Chapter 36 The Parting of the Ways

Dumbledore stood up. He stared down at Barty Crouch for a moment with disgust on his face. Then he raised his wand once more and ropes flew out of it, ropes that twisted themselves around Barty Crouch, binding him tightly. He turned to Professor McGonagall. â€Å"Minerva, could I ask you to stand guard here while I take Harry upstairs?† â€Å"Of course,† said Professor McGonagall. She looked slightly nauseous, as though she had just watched someone being sick. However, when she drew out her wand and pointed it at Barty Crouch, her hand was quite steady. â€Å"Severus† – Dumbledore turned to Snape – â€Å"please tell Madam Pomfrey to come down here; we need to get Alastor Moody into the hospital wing. Then go down into the grounds, find Cornelius Fudge, and bring him up to this office. He will undoubtedly want to question Crouch himself. Tell him I will be in the hospital wing in half an hour's time if he needs me.† Snape nodded silently and swept out of the room. â€Å"Harry?† Dumbledore said gently. Harry got up and swayed again; the pain in his leg, which he had not noticed all the time he had been listening to Crouch, now returned in full measure. He also realized that he was shaking. Dumbledore gripped his arm and helped him out into the dark corridor. â€Å"I want you to come up to my office first. Harry,† he said quiedy as they headed up the passageway. â€Å"Sirius is waiting for us there.† Harry nodded. A kind of numbness and a sense of complete unreality were upon him, but he did not care; he was even glad of it. He didn't want to have to think about anything that had happened since he had first touched the Triwizard Cup. He didn't want to have to examine the memories, fresh and sharp as photographs, which kept flashing across his mind. Mad-Eye Moody, inside the trunk. Wormtail, slumped on the ground, cradling his stump of an arm. Voldemort, rising from the steaming cauldron. Cedric†¦dead†¦Cedric, asking to be returned to his parents†¦. â€Å"Professor,† Harry mumbled, â€Å"where are Mr. and Mrs. Diggory?† â€Å"They are with Professor Sprout,† said Dumbledore. His voice, which had been so calm throughout the interrogation of Barty Crouch, shook very slightly for the first time. â€Å"She was Head of Cedric's house, and knew him best.† They had reached the stone gargoyle. Dumbledore gave the password, it sprang aside, and he and Harry went up the moving spiral staircase to the oak door. Dumbledore pushed it open. Sirius was standing there. His face was white and gaunt as it had been when he had escaped Azkaban. In one swift moment, he had crossed the room. â€Å"Harry, are you all right? I knew it – I knew something like this – what happened?† His hands shook as he helped Harry into a chair in front of the desk. â€Å"What happened?† he asked more urgently. Dumbledore began to tell Sirius everything Barty Crouch had said. Harry was only half listening. So tired every bone in his body was aching, he wanted nothing more than to sit here, undisturbed, for hours and hours, until he fell asleep and didn't have to think or feel anymore. There was a soft rush of wings. Fawkes the phoenix had left his perch, flown across the office, and landed on Harry's knee. â€Å"‘Lo, Fawkes,† said Harry quietly. He stroked the phoenix's beautiful scarlet-and-gold plumage. Fawkes blinked peacefully up at him. There was something comforting about his warm weight. Dumbledore stopped talking. He sat down opposite Harry, behind his desk. He was looking at Harry, who avoided his eyes. Dumbledore was going to question him. He was going to make Harry relive everything. â€Å"I need to know what happened after you touched the Portkey in the maze. Harry,† said Dumbledore. â€Å"We can leave that till morning, can't we, Dumbledore?† said Sirius harshly. He had put a hand on Harry's shoulder. â€Å"Let him have a sleep. Let him rest.† Harry felt a rush of gratitude toward Sirius, but Dumbledore took no notice of Sirius's words. He leaned forward toward Harry. Very unwillingly, Harry raised his head and looked into those blue eyes. â€Å"If I thought I could help you,† Dumbledore said gently, â€Å"by putting you into an enchanted sleep and allowing you to postpone the moment when you would have to think about what has happened tonight, I would do it. But I know better. Numbing the pain for a while will make it worse when you finally feel it. You have shown bravery beyond anything I could have expected of you. I ask you to demonstrate your courage one more time. I ask you to tell us what happened.† The phoenix let out one soft, quavering note. It shivered in the air, and Harry felt as though a drop of hot liquid had slipped down his throat into his stomach, warming him, and strengthening him. He took a deep breath and began to tell them. As he spoke, visions of everything that had passed that night seemed to rise before his eyes; he saw the sparkling surface of the potion that had revived Voldemort; he saw the Death Eaters Apparating between the graves around them; he saw Cedric's body, lying on the ground beside the cup. Once or twice, Sirius made a noise as though about to say something, his hand still tight on Harry's shoulder, but Dumbledore raised his hand to stop him, and Harry was glad of this, because it was easier to keep going now he had started. It was even a relief; he felt almost as though something poisonous were being extracted from him. It was costing him every bit of determination he had to keep talking, yet he sensed that once he had finished, he would feel better. When Harry told of Wormtail piercing his arm with the dagger, however, Sirius let out a vehement exclamation and Dumbledore stood up so quickly that Harry started. Dumbledore walked around the desk and told Harry to stretch out his arm. Harry showed them both the place where his robes were torn and the cut beneath them. â€Å"He said my blood would make him stronger than if he'd used someone else's,† Harry told Dumbledore. â€Å"He said the protection my – my mother left in me – he'd have it too. And he was right – he could touch me without hurting himself, he touched my face.† For a fleeting instant, Harry thought he saw a gleam of something like triumph in Dumbledore's eyes. But next second. Harry was sure he had imagined it, for when Dumbledore had returned to his seat behind the desk, he looked as old and weary as Harry had ever seen him. â€Å"Very well,† he said, sitting down again. â€Å"Voldemort has overcome that particular barrier. Harry, continue, please.† Harry went on; he explained how Voldemort had emerged from the cauldron, and told them all he could remember of Voldemort's speech to the Death Eaters. Then he told how Voldemort had untied him, returned his wand to him, and prepared to duel. But when he reached the part where the golden beam of light had connected his and Voldemort's wands, he found his throat obstructed. He tried to keep talking, but the memories of what had come out of Voldemort's wand were flooding into his mind. He could see Cedric emerging, see the old man, Bertha Jorkins†¦his father†¦his mother†¦ He was glad when Sirius broke the silence. â€Å"The wands connected?† he said, looking from Harry to Dumbledore. â€Å"Why?† Harry looked up at Dumbledore again, on whose face there was an arrested look. â€Å"Priori Incantatem,† he muttered. His eyes gazed into Harry's and it was almost as though an invisible beam of understanding shot between them. â€Å"The Reverse Spell effect?† said Sirius sharply. â€Å"Exactly,† said Dumbledore. â€Å"Harry's wand and Voldemort's wand share cores. Each of them contains a feather from the tail of the same phoenix. This phoenix, in fact,† he added, and he pointed at the scarlet-and-gold bird, perching peacefully on Harry's knee. â€Å"My wand's feather came from Fawkes?† Harry said, amazed. â€Å"Yes,† said Dumbledore. â€Å"Mr. Ollivander wrote to tell me you had bought the second wand, the moment you left his shop four years ago.† â€Å"So what happens when a wand meets its brother?† said Sirius. â€Å"They will not work properly against each other,† said Dumbledore. â€Å"If, however, the owners of the wands force the wands to do battle†¦a very rare effect will take place. One of the wands will force the other to regurgitate spells it has performed – in reverse. The most recent first†¦and then those which preceded it†¦.† He looked interrogatively at Harry, and Harry nodded. â€Å"Which means,† said Dumbledore slowly, his eyes upon Harry's face, â€Å"that some form of Cedric must have reappeared.† Harry nodded again. â€Å"Diggory came back to life?† said Sirius sharply. â€Å"No spell can reawaken the dead,† said Dumbledore heavily. â€Å"All that would have happened is a kind of reverse echo. A shadow of the living Cedric would have emerged from the wand†¦am I correct, Harry?† â€Å"He spoke to me,† Harry said. He was suddenly shaking again. â€Å"The†¦the ghost Cedric, or whatever he was, spoke.† â€Å"An echo,† said Dumbledore, â€Å"which retained Cedric's appearance and character. I am guessing other such forms appeared†¦less recent victims of Voldemort's wand†¦.† â€Å"An old man,† Harry said, his throat still constricted. â€Å"Bertha Jorkins. And†¦Ã¢â‚¬  â€Å"Your parents?† said Dumbledore quietly. â€Å"Yes,† said Harry. Sirius's grip on Harry's shoulder was now so tight it was painful. â€Å"The last murders the wand performed,† said Dumbledore, nodding. â€Å"In reverse order. More would have appeared, of course, had you maintained the connection. Very well, Harry, these echoes, these shadows†¦what did they do?† Harry described how the figures that had emerged from the wand had prowled the edges of the golden web, how Voldemort had seemed to fear them, how the shadow of Harry's mother had told him what to do, how Cedric's had made its final request. At this point. Harry found he could not continue. He looked around at Sirius and saw that he had his face in his hands. Harry suddenly became aware that Fawkes had left his knee. The phoenix had fluttered to the floor. It was resting its beautiful head against Harry's injured leg, and thick, pearly tears were falling from its eyes onto the wound left by the spider. The pain vanished. The skin mended. His leg was repaired. â€Å"I will say it again,† said Dumbledore as the phoenix rose into the air and resettled itself upon the perch beside the door. â€Å"You have shown bravery beyond anything I could have expected of you tonight. Harry. You have shown bravery equal to those who died fighting Voldemort at the height of his powers. You have shouldered a grown wizard's burden and found yourself equal to it – and you have now given us all we have a right to expect. You will come with me to the hospital wing. I do not want you returning to the dormitory tonight. A Sleeping Potion, and some peace†¦Sirius, would you like to stay with him?† Sirius nodded and stood up. He transformed back into the great black dog and walked with Harry and Dumbledore out of the office, accompanying them down a flight of stairs to the hospital wing. When Dumbledore pushed open the door. Harry saw Mrs. Weasley, Bill, Ron, and Hermione grouped around a harassed-looking Madam Pomfrey. They appeared to be demanding to know where Harry was and what had happened to him. All of them whipped around as Harry, Dumbledore, and the black dog entered, and Mrs. Weasley let out a kind of muffled scream. â€Å"Harry! Oh Harry!† She started to hurry toward him, but Dumbledore moved between them. â€Å"Molly,† he said, holding up a hand, â€Å"please listen to me for a moment. Harry has been through a terrible ordeal tonight. He has just had to relive it for me. What he needs now is sleep, and peace, and quiet. If he would like you all to stay with him,† he added, looking around at Ron, Hermione, and Bill too, â€Å"you may do so. But I do not want you questioning him until he is ready to answer, and certainly not this evening.† Mrs. Weasley nodded. She was very white. She rounded on Ron, Hermione, and Bill as though they were being noisy, and hissed, â€Å"Did you hear? He needs quiet!† â€Å"Headmaster,† said Madam Pomfrey, staring at the great black dog that was Sirius, â€Å"may I ask what – ?† â€Å"This dog will be remaining with Harry for a while,† said Dumbledore simply. â€Å"I assure you, he is extremely well trained. Harry – I will wait while you get into bed.† Harry felt an inexpressible sense of gratitude to Dumbledore for asking the others not to question him. It wasn't as though he didn't want them there; but the thought of explaining it all over again, the idea of reliving it one more time, was more than he could stand. â€Å"I will be back to see you as soon as I have met with Fudge, Harry,† said Dumbledore. â€Å"I would like you to remain here tomorrow until I have spoken to the school.† He left. As Madam Pomfrey led Harry to a nearby bed, he caught sight of the real Moody lying motionless in a bed at the far end of the room. His wooden leg and magical eye were lying on the bedside table. â€Å"Is he okay?† Harry asked. â€Å"He'll be fine,† said Madam Pomfrey, giving Harry some pajamas and pulling screens around him. He took off his robes, pulled on the pajamas, and got into bed. Ron, Hermione, Bill, Mrs. Weasley, and the black dog came around the screen and settled themselves in chairs on either side of him. Ron and Hermione were looking at him almost cautiously, as though scared of him. â€Å"I'm all right,† he told them. â€Å"Just tired.† Mrs. Weasley's eyes filled with tears as she smoothed his bed-covers unnecessarily. Madam Pomfrey, who had bustled off to her office, returned holding a small bottle of some purple potion and a goblet. â€Å"You'll need to drink all of this. Harry,† she said. â€Å"It's a potion for dreamless sleep.† Harry took the goblet and drank a few mouthfuls. He felt himself becoming drowsy at once. Everything around him became hazy; the lamps around the hospital wing seemed to be winking at him in a friendly way through the screen around his bed; his body felt as though it was sinking deeper into the warmth of the feather matress. Before he could finish the potion, before he could say another word, his exhaustion had carried him off to sleep. Harry woke up, so warm, so very sleepy, that he didn't open his eyes, wanting to drop off again. The room was still dimly lit; he was sure it was still nighttime and had a feeling that he couldn't have been asleep very long. Then he heard whispering around him. â€Å"They'll wake him if they don't shut up!† â€Å"What are they shouting about? Nothing else can have happened, can it?† Harry opened his eyes blearily. Someone had removed his glasses. He could see the fuzzy outlines of Mrs. Weasley and Bill close by. Mrs. Weasley was on her feet. â€Å"That's Fudge's voice,† she whispered. â€Å"And that's Minerva McGonagall's, isn't it? But what are they arguing about?† Now Harry could hear them too: people shouting and running toward the hospital wing. â€Å"Regrettable, but all the same, Minerva -† Cornelius Fudge was saying loudly. â€Å"You should never have brought it inside the castle!† yelled Professor McGonagall. â€Å"When Dumbledore finds out -â€Å" Harry heard the hospital doors burst open. Unnoticed by any of the people around his bed, all of whom were staring at the door as Bill pulled back the screens, Harry sat up and put his glasses back on. Fudge came striding up the ward. Professors McGonagall and Snape were at his heels. â€Å"Where's Dumbledore?† Fudge demanded of Mrs. Weasley. â€Å"He's not here,† said Mrs. Weasley angrily. â€Å"This is a hospital wing. Minister, don't you think you'd do better to -â€Å" But the door opened, and Dumbledore came sweeping up the ward. â€Å"What has happened?† said Dumbledore sharply, looking from Fudge to Professor McGonagall. â€Å"Why are you disturbing these people? Minerva, I'm surprised at you – I asked you to stand guard over Barty Crouch -â€Å" â€Å"There is no need to stand guard over him anymore, Dumbledore!† she shrieked. â€Å"The Minister has seen to that!† Harry had never seen Professor McGonagall lose control like this. There were angry blotches of color in her cheeks, and a hands were balled into fists; she was trembling with fury.- â€Å"When we told Mr. Fudge that we had caught the Death Eater responsible for tonight's events,† said Snape, in a low voice; he seemed to feel his personal safety was in question. He insisted on summoning a dementor to accompany him into the castle. He brought it up to the office where Barty Crouch -â€Å" â€Å"I told him you would not agree, Dumbledore!† McGonagall fumed. â€Å"I told him you would never allow dementors to set foot inside the castle, but -â€Å" â€Å"My dear woman!† roared Fudge, who likewise looked angrier than Harry had ever seen him, â€Å"as Minister of Magic, it is my decision whether I wish to bring protection with me when interviewing a possibly dangerous -â€Å" But Professor McGonagall's voice drowned Fudge's. â€Å"The moment that – that thing entered the room,† she screamed, pointing at Fudge, trembling all over, â€Å"it swooped down on Crouch and – and -â€Å" Harry felt a chill in his stomach as Professor McGonagall struggled to find words to describe what had happened. He did not need her to finish her sentence. He knew what the dementor must have done. It had administered its fatal kiss to Barty Crouch. It had sucked his soul out through his mouth. He was worse than dead. â€Å"By all accounts, he is no loss!† blustered Fudge. â€Å"It seems he has been responsible for several deaths'.† â€Å"But he cannot now give testimony, Cornelius,† said Dumbledore. He was staring hard at Fudge, as though seeing him plainly for the first time. â€Å"He cannot give evidence about why he killed those people.† â€Å"Why he killed them? Well, that's no mystery, is it?† blustered Fudge. â€Å"He was a raving lunatic! From what Minerva and Severus have told me, he seems to have thought he was doing it all on You-Know-Who's instructions!† â€Å"Lord Voldemort was giving him instructions, Cornelius,† Dumbledore said. â€Å"Those peoples deaths were mere by-products of a plan to restore Voldemort to full strength again. The plan succeeded. Voldemort has been restored to his body.† Fudge looked as though someone had just swung a heavy weight into his face. Dazed and blinking, he stared back at Dumbledore as if he couldn't quite believe what he had just heard. He began to sputter, still goggling at Dumbledore. â€Å"You-Know-Who†¦returned? Preposterous. Come now, Dumbledore†¦Ã¢â‚¬  â€Å"As Minerva and Severus have doubtless told you,† said Dumbledore, â€Å"we heard Barty Crouch confess. Under the influence of Veritaserum, he told us how he was smuggled out of Azkaban, and how Voldemort – learning of his continued existence from Bertha Jorkins – went to free him from his father and used him to capture Harry. The plan worked, I tell you. Crouch has helped Voldemort to return.† â€Å"See here, Dumbledore,† said Fudge, and Harry was astonished to see a slight smile dawning on his face, â€Å"you – you can't seriously believe that You-Know-Who – back? Come now, come now†¦certainly, Crouch may have believed himself to be acting upon You-Know-Who's orders – but to take the word of a lunatic like that, Dumbledore†¦Ã¢â‚¬  â€Å"When Harry touched the Triwizard Cup tonight, he was transported straight to Voldemort,† said Dumbledore steadily. â€Å"He witnessed Lord Voldemort's rebirth. I will explain it all to you if you will step up to my office.† Dumbledore glanced around at Harry and saw that he was awake, but shook his head and said, â€Å"I am afraid I cannot permit you to question Harry tonight.† Fudge's curious smile lingered. He too glanced at Harry, then looked back at Dumbledore, and said, â€Å"You are – er – prepared to take Harry's word on this, are you, Dumbledore?† There was a moment's silence, which was broken by Sirius growling. His hackles were raised, and he was baring his teeth at Fudge. â€Å"Certainly, I believe Harry,† said Dumbledore. His eyes were blazing now. â€Å"I heard Crouch's confession, and I heard Harry's account of what happened after he touched the Triwizard Cup; the two stories make sense, they explain everything that has happened since Bertha Jorkins disappeared last summer.† Fudge still had that strange smile on his face. Once again, he glanced at Harry before answering. â€Å"You are prepared to believe that Lord Voldemort has returned, on the word of a lunatic murderer, and a boy who†¦well†¦Ã¢â‚¬  Fudge shot Harry another look, and Harry suddenly understood. â€Å"You've been reading Rita Skeeter, Mr. Fudge,† he said quietly. Ron, Hermione, Mrs. Weasley, and Bill all jumped. None of them had realized that Harry was awake. Fudge reddened slightly, but a defiant and obstinate look came over his face. â€Å"And if I have?† he said, looking at Dumbledore. â€Å"If I have discovered that you've been keeping certain facts about the boy very quiet? A Parselmouth, eh? And having funny turns all over the place -â€Å" â€Å"I assume that you are referring to the pains Harry has been experiencing in his scar?† said Dumbledore coolly. â€Å"You admit that he has been having these pains, then?† said Fudge quickly. â€Å"Headaches? Nightmares? Possibly – hallucinations?† â€Å"Listen to me, Cornelius,† said Dumbledore, taking a step toward Fudge, and once again, he seemed to radiate that indefinable sense of power that Harry had felt after Dumbledore had Stunned young Crouch. â€Å"Harry is as sane as you or I. That scar upon his forehead has not addled his brains. I believe it hurts him when Lord Voldemort is close by, or feeling particularly murderous.† Fudge had taken half a step back from Dumbledore, but he looked no less stubborn. â€Å"You'll forgive me, Dumbledore, but I've never heard of a curse scar acting as an alarm bell before†¦.† â€Å"Look, I saw Voldemort come back!† Harry shouted. He tried to get out of bed again, but Mrs. Weasley forced him back. â€Å"I saw the Death Eaters! I can give you their names! Lucius Malfoy -â€Å" Snape made a sudden movement, but as Harry looked at him, Snape's eyes flew back to Fudge. â€Å"Malfoy was cleared!† said Fudge, visibly affronted. â€Å"A very old family – donations to excellent causes -â€Å" â€Å"Macnair!† Harry continued. â€Å"Also cleared! Now working for the Ministry!† â€Å"Avery – Nott – Crabbe – Goyle -â€Å" â€Å"You are merely repeating the names of those who were acquitted of being Death Eaters thirteen years ago!† said Fudge angrily. â€Å"You could have found those names in old reports of the trials! For heavens sake, Dumbledore – the boy was full of some crackpot story at the end of last year too – his tales are getting taller, and you're still swallowing them – the boy can talk to snakes. Dumbledore, and you still think he's trustworthy?† â€Å"You fool!† Professor McGonagall cried. â€Å"Cedric Diggory! Mr. Crouch! These deaths were not the random work of a lunatic!† â€Å"I see no evidence to the contrary!† shouted Fudge, now matching her anger, his face purpling. â€Å"It seems to me that you are all determined to start a panic that will destabilize everything we have worked for these last thirteen years!† Harry couldn't believe what he was hearing. He had always thought of Fudge as a kindly figure, a little blustering, a little pompous, but essentially good-natured. But now a short, angry wizard stood before him, refusing, point-blank, to accept the prospect of disruption in his comfortable and ordered world – to believe that Voldemort could have risen. â€Å"Voldemort has returned,† Dumbledore repeated. â€Å"If you accept that fact straightaway. Fudge, and take the necessary measures, we may still be able to save the situation. The first and most essential step is to remove Azkaban from the control of the dementors -â€Å" â€Å"Preposterous!† shouted Fudge again. â€Å"Remove the dementors? I'd be kicked out of office for suggesting it! Half of us only feel safe in our beds at night because we know the dementors are standing guard at Azkaban!† â€Å"The rest of us sleep less soundly in our beds, Cornelius, knowing that you have put Lord Voldemort's most dangerous supporters in the care of creatures who will join him the instant he asks them!† said Dumbledore. â€Å"They will not remain loyal to you, Fudge! Voldemort can offer them much more scope for their powers and their pleasures than you can! With the dementors behind him, and his old supporters returned to him, you will be hard-pressed to stop him regaining the sort of power he had thirteen years ago!† Fudge was opening and closing his mouth as though no words could express his outrage. â€Å"The second step you must take – and at once,† Dumbledore pressed on, â€Å"is to send envoys to the giants.† â€Å"Envoys to the giants?† Fudge shrieked, finding his tongue again. â€Å"What madness is this?† â€Å"Extend them the hand of friendship, now, before it is too late,† said Dumbledore, â€Å"or Voldemort will persuade them, as he did before, that he alone among wizards will give them their rights and their freedom!† â€Å"You – you cannot be serious!† Fudge gasped, shaking his head and retreating further from Dumbledore. â€Å"If the magical community got wind that I had approached the giants – people hate them, Dumbledore – end of my career -â€Å" â€Å"You are blinded,† said Dumbledore, his voice rising now, the aura of power around him palpable, his eyes blazing once more, â€Å"by the love of the office you hold, Cornelius! You place too much importance, and you always have done, on the so-called purity of blood! You fail to recognize that it matters not what someone is born, but what they grow to be! Your dementor has just destroyed the last remaining member of a pure-blood family as old as any – and see what that man chose to make of his life! I tell you now- take the steps I have suggested, and you will be remembered, in office or out, as one of the bravest and greatest Ministers of Magic we have ever known. Fail to act – and history will remember you as the man who stepped aside and allowed Voldemort a second chance to destroy the world we have tried to rebuild!† â€Å"Insane,† whispered Fudge, still backing away. â€Å"Mad†¦Ã¢â‚¬  And then there was silence. Madam Pomfrey was standing frozen at the foot of Harry's bed, her hands over her mouth. Mrs.Weasley was still standing over Harry, her hand on his shoulder to prevent him from rising. Bill, Ron, and Hermione were staring at Fudge. â€Å"If your determination to shut your eyes will carry you as far as this, Cornelius,† said Dumbledore, â€Å"we have reached a parting of the ways. You must act as you see fit. And I – I shall act as I see fit.† Dumbledore's voice carried no hint of a threat; it sounded like a mere statement, but Fudge bristled as though Dumbledore were advancing upon him with a wand. â€Å"Now, see here, Dumbledore,† he said, waving a threatening finger. â€Å"I've given you free rein, always. I've had a lot of respect for you. I might not have agreed with some of your decisions, but I've kept quiet. There aren't many who'd have let you hire werewolves, or keep Hagrid, or decide what to teach your students without reference to the Ministry. But if you're going to work against me -â€Å" â€Å"The only one against whom I intend to work,† said Dumbledore, â€Å"is Lord Voldemort. If you are against him, then we remain, Cornelius, on the same side.† It seemed Fudge could think of no answer to this. He rocked backward and forward on his small feet for a moment and spun his bowler hat in his hands. Finally, he said, with a hint of a plea in his voice, â€Å"He can't be back, Dumbledore, he just can't be†¦Ã¢â‚¬  Snape strode forward, past Dumbledore, pulling up the left sleeve of his robes as he went. He stuck out his forearm and showed it to Fudge, who recoiled. â€Å"There,† said Snape harshly. â€Å"There. The Dark Mark. It is not as clear as it was an hour or so ago, when it burned black, but you can still see it. Every Death Eater had the sign burned into him by the Dark Lord. It was a means of distinguishing one another, and his means of summoning us to him. When he touched the Mark of any Death Eater, we were to Disapparate, and Apparate, instantly, at his side. This Mark has been growing clearer all year. Karkaroff's too. Why do you think Karkaroff fled tonight? We both felt the Mark burn. We both knew he had returned. Karkaroff fears the Dark Lord's vengeance. He betrayed too many of his fellow Death Eaters to be sure of a welcome back into the fold.† Fudge stepped back from Snape too. He was shaking his head. He did not seem to have taken in a word Snape had said. He stared, apparently repelled by the ugly mark on Snape's arm, then looked up at Dumbledore and whispered, â€Å"I don't know what you and your staff are playing at, Dumbledore, but I have heard enough. I have no more to add. I will be in touch with you tomorrow, Dumbledore, to discuss the running of this school. I must return to the Ministry.† He had almost reached the door when he paused. He turned around, strode back down the dormitory, and stopped at Harry's bed. â€Å"Your winnings,† he said shortly, taking a large bag of gold out of his pocket and dropping it onto Harry's bedside table. â€Å"One thousand Galleons. There should have been a presentation ceremony, but under the circumstances†¦Ã¢â‚¬  He crammed his bowler hat onto his head and walked out of the room, slamming the door behind him. The moment he had disappeared, Dumbledore turned to look at the group around Harry's bed. â€Å"There is work to be done,† he said. â€Å"Molly†¦am I right in thinking that I can count on you and Arthur?† â€Å"Of course you can,† said Mrs. Weasley. She was white to the lips, but she looked resolute. â€Å"We know what Fudge is. It's Arthur's fondness for Muggles that has held him back at the Ministry all these years. Fudge thinks he lacks proper wizarding pride.† â€Å"Then I need to send a message to Arthur,† said Dumbledore. â€Å"All those that we can persuade of the truth must be notified immediately, and he is well placed to contact those at the Ministry who are not as shortsighted as Cornelius.† â€Å"I'll go to Dad,† said Bill, standing up. â€Å"I'll go now.† â€Å"Excellent,† said Dumbledore. â€Å"Tell him what has happened. Tell him I will be in direct contact with him shortly. He will need to be discreet, however. If Fudge thinks I am interfering at the Ministry -â€Å" â€Å"Leave it to me,† said Bill. He clapped a hand on Harry's shoulder, kissed his mother on the cheek, pulled on his cloak, and strode quickly from the room. â€Å"Minerva,† said Dumbledore, turning to Professor McGonagall, â€Å"I want to see Hagrid in my office as soon as possible. Also – if she will consent to come – Madame Maxime.† Professor McGonagall nodded and left without a word. â€Å"Poppy,† Dumbledore said to Madam Pomfrey, â€Å"would you be very kind and go down to Professor Moody's office, where I think you will find a house-elf called Winky in considerable distress? Do what you can for her, and take her back to the kitchens. I think Dobby will look after her for us.† â€Å"Very – very well,† said Madam Pomfrey, looking startled, and she too left. Dumbledore made sure that the door was closed, and that Madam Pomfrey's footsteps had died away, before he spoke again. â€Å"And now,† he said, â€Å"it is time for two of our number to recognize each other for what they are. Sirius†¦if you could resume your usual form.† The great black dog looked up at Dumbledore, then, in an instant, turned back into a man. Mrs. Weasley screamed and leapt back from the bed. â€Å"Sirius Black!† she shrieked, pointing at him. â€Å"Mum, shut up!† Ron yelled. â€Å"It's okay!† Snape had not yelled or jumped backward, but the look on his face was one of mingled fury and horror. â€Å"Him!† he snarled, staring at Sirius, whose face showed equal dislike. â€Å"What is he doing here?† â€Å"He is here at my invitation,† said Dumbledore, looking between them, â€Å"as are you, Severus. I trust you both. It is time for you to lay aside your old differences and trust each other.† Harry thought Dumbledore was asking for a near miracle. Sirius and Snape were eyeing each other with the utmost loathing. â€Å"I will settle, in the short term,† said Dumbledore, with a bite of impatience in his voice, â€Å"for a lack of open hostility. You will shake hands. You are on the same side now. Time is short, and unless the few of us who know the truth do not stand united, there is no hope for any us. Very slowly – but still glaring at each other as though each wished the other nothing but ill – Sirius and Snape moved toward each other and shook hands. They let go extremely quickly. â€Å"That will do to be going on with,† said Dumbledore, stepping between them once more. â€Å"Now I have work for each of you. Fudge's attitude, though not unexpected, changes everything. Sirius, I need you to set off at once. You are to alert Remus Lupin, Arabella Figg, Mundungus Fletcher – the old crowd. Lie low at Lupin's for a while; I will contact you there.† â€Å"But -† said Harry. He wanted Sirius to stay. He did not want to have to say goodbye again so quickly. â€Å"You'll see me very soon. Harry,† said Sirius, turning to him. â€Å"I promise you. But I must do what I can, you understand, don't you?† â€Å"Yeah,† said Harry. â€Å"Yeah†¦of course I do.† Sirius grasped his hand briefly, nodded to Dumbledore, transformed again into the black dog, and ran the length of the room to the door, whose handle he turned with a paw. Then he was gone. â€Å"Severus,† said Dumbledore, turning to Snape, â€Å"you know what I must ask you to do. If you are ready†¦if you are prepared†¦Ã¢â‚¬  â€Å"I am,† said Snape. He looked slightly paler than usual, and his cold, black eyes glittered strangely. â€Å"Then good luck,† said Dumbledore, and he watched, with a trace of apprehension on his face, as Snape swept wordlessly after Sirius. It was several minutes before Dumbledore spoke again. â€Å"I must go downstairs,† he said finally. â€Å"I must see the Diggory's. Harry – take the rest of your potion. I will see all of you later.† Harry slumped back against his pillows as Dumbledore disappeared. Hermione, Ron, and Mrs. Weasley were all looking at him. None of them spoke for a very long time. â€Å"You've got to take the rest of your potion. Harry,† Mrs. Weasley said at last. Her hand nudged the sack of gold on his bedside cabinet as she reached for the bottle and the goblet. â€Å"You have a good long sleep. Try and think about something else for a while†¦think about what you're going to buy with your winnings!† â€Å"I don't want that gold,† said Harry in an expressionless voice. â€Å"You have it. Anyone can have it. I shouldn't have won it. It should've been Cedric's.† The thing against which he had been fighting on and off ever since he had come out of the maze was threatening to overpower him. He could feel a burning, prickling feeling in the inner corners of his eyes. He blinked and stared up at the ceiling. â€Å"It wasn't your fault. Harry,† Mrs. Weasley whispered. â€Å"I told him to take the cup with me,† said Harry. Now the burning feeling was in his throat too. He wished Ron would look away. Mrs. Weasley set the potion down on the bedside cabinet, bent down, and put her arms around Harry. He had no memory of ever being hugged like this, as though by a mother. The full weight of everything he had seen that night seemed to fall in upon him as Mrs. Weasley held him to her. His mother's face, his father's voice, the sight of Cedric, dead on the ground all started spinning in his head until he could hardly bear it, until he was screwing up his face against the howl of misery fighting to get out of him. There was a loud slamming noise, and Mrs. Weasley and Harry broke apart. Hermione was standing by the window. She was holding something tight in her hand. â€Å"Sorry,† she whispered. â€Å"Your potion, Harry,† said Mrs. Weasley quickly, wiping her eyes on the back of her hand. Harry drank it in one gulp. The effect was instantaneous. Heavy, irresistible waves of dreamless sleep broke over him; he fell back onto his pillows and thought no more.

How is the national and international tourism helping Spain overcome Essay

Spain is one of the countries in the world that has been severely affected by the global economic crisis originated in 2008. It is the country with the greatest number of unemployed citizens in all Europe. Its rate of unemployment reached an all time high of 26. 9% in May 2013. The European Union is worried about this situation, and has therefore forced the Spanish Government to apply some strict cut backs to their economy in order to decrease its high public deficit. These measures are mostly affecting public labor force, who realized they don’t have sufficient income to last them through the month. In addition, college students, mainly those who study architecture, engineering and medicine, have realized that there is not a promising professional career that can be developed in Spain. Since the beginning of the economic crisis, more than 300,000 young Spanish citizens have left the country in order to find a job in markets overseas. All these negative aspects of the country’s critical situation are bringing Spain forward to be a candidate of receiving a bailout from the European Union. Despite being in this delicate position, it is not all about negative figures in Spain. There is one sector of the Spanish economy that is helping the country to come back on track: tourism. The purpose of this report is to find out how tourism is helping Spain to recover from the economic decline. I have divided the findings into two sections: First, I will explain the importance of tourism in Spain. Second, I will describe the general changes in both international and national tourism, without analyzing the monetary effects in the economy. Third, I will provide information about the economical consequences that these changes are having in the reactivation of the Spanish economy. Findings 1- Importance of Tourism in the Spanish Economy Spain, behind France, the United States and China, is one of the top world destinations to go on vacation. Its 7,876 kilometers of beautiful beaches, pleasant weather and 44 world heritage monuments, position the country as the 4th country in the world to receive the highest number of international tourists. In terms of revenues, the country is ranked in second position right after the United States (Butler, 2013). According to the World Travel and Tourism Council (WTTC), tourism represented a total contribution of 15. 2 % of Spain’s Gross Domestic Product in 2012. In other developed countries, such as the United States, France and China, tourism represented a 8. 6%, 9. 7% and 9. 3% of their respective 2012 GDP (2013). This shows that, despite receiving more tourists than Spain, these countries’ economic lives are less affected and determined by the changes that might take place in the tourism sector. The Government of Spain knows how crucial tourism is for the performance of the country’s economy and gives this sector high importance. As a touristic oriented country, Spain has 47 airports, 2,000 km of commuter rail trains and 2,900 km of high-speed rail network (Butler, 2013). These elements make Spain one of the countries with the best transportation system in the world. This advantage of Spain facilitates the arrival of international tourists and the transportation of national tourists all over the country. In addition, as I mentioned before, one of Spain’s biggest problems is its increasing rate of unemployment. The WTTC published that travel and tourism directly supported 894,000 jobs in Spain. This means that 5. 2% of workers were related to this specific sector of the economy (2013). All the figures I just pointed out reflect the positive and remarkable impact of tourism in Spain’s economy. Now, I am going to present some more detailed information about the changes in the national and international tourism, and the consequences of these changes relating them to the fact that tourism is the main force that is helping Spain to overcome this fragile situation. 2- Changes in Tourism in Spain Since the beginning of the global economic crisis, tourism in Spain has changed in many ways. Not only has it influenced the amount of foreigners’ visits to Spain, but it has also affected the domestic conception of going on vacation. Changes in International Tourism As I said in the Introduction, Spain received more than 57 million tourists during 2012, which means it had a year-over-year growth of 2. 7%. The countries that contributed the most to this growth are France, Germany and Russia. In addition, some Nordic and Asiatic countries also collaborated on it (Institute of Touristic Studies of Spain [ITE], 2013). The main positive elements of the Spanish economy come from the foreign sector. It is important to point out that the total nights international tourists stayed in Spain increased by 2. 3% in 2012. Looking at the low rates of unemployment in France, Germany, United Kingdom and Russia, it can be deduced that these countries are performing economically better than Spain. This means that foreigners, who have not been as affected as the Spaniards by the economic crisis, have enough income and are willing to go on vacation outside of their home countries. The Institute of Touristic Studies from Spain, assures that Spanish tourism has become more competitive in the last few years. By analyzing the changes in prices and the value of the currency compared to other countries, this Institute has used the Competitiveness Trend in Tourism Ratio to measure the performance of the country. It has arrived to the conclusion that, due to the low prices compared with other countries from the European Union, Spain has achieved a beneficial position to attract international tourists to the country (2013). Changes in National Tourism As well as the international, national tourism has experienced many changes during the past few years. National tourism in Spain closed the year 2012 with 158,9 millions domestic trips. It is important to highlight that 9 out of 10 of Spanish citizens’ trips were effectuated inside the country. Due to the difficult economic situation that many Spaniards are experiencing, travelling to other countries decreased by 4. 8% in 2012 (ITE, 2013). This new setting where saving money is the main concern for Spanish citizens, has helped new forms of travelling to arise in the Spanish touristic sector. Even thought Spain has always been seen as a â€Å"sun and beach† destination, Antonio Villanueva Cuevas, Doctor at the Castilla-La Mancha University, explains that news forms of travelling such as rural, cultural and natural tourism are becoming popular between Spaniards that are looking to travel with minimum expenses (2012). In addition, those who still prefer going to the beach have found their way to get cheap options by either going during low season or taking last minute deals. 3- How are These Changes Having a Positive Impact in the Spanish Economy? Since tourism in Spain represents a large part of its Gross Domestic Product, this sector of the economy will have a considerable impact on the country’s economy performance. The growths of international and national tourism have helped the country to stay â€Å"economically alive† (Barreira, 2013). Positive Impact from International Tourism In relation to the international tourism, Spain is the 4th country in the world to receive the highest number of tourists. More than 57 million tourists visited Spain in 2012. Moreover, there was a high new record of 56 billion Euros reached in spent by international tourists in Spain. The growth of the number of international tourists that visited Spain in 2012 helped the country’s economy by contributing â‚ ¬57. 1 billion to the GDP (ITE, 2013). Even though Spain’s GDP fell by 1. 3% in 2012, the growth of the international tourism made the GDP experience a shorter descent. Another positive impact of the international tourism is the fact that the number of workers hired in the tourism sector increased by 0. 6% in 2012 (World Travel and Tourism Council [WTTC], 2013). It might be seen as an insignificant growth, but, taking into account that the general rate of unemployment increased to 26% in 2013, any contribution has an important meaning for the reactivation of the country’s economy. International tourism also caused the growth of capital investment by 7. 4% to â‚ ¬14. 8 billion in 2012 (WTTC, 2013). In addition, the fact that prices in Spain are low compared to other countries in the European Union, makes Spain more attractive to receive investments and be chosen as a holiday destination. All these positive consequences of the international tourism in the Spanish economy are helping the country to achieve the goal of not seeing Spain as a burden for the European Union. The recuperation of the country’s economy will be determined by the growth of GDP, decrease of unemployment rate and increase in foreign investments in the country. All these aspects are represented by the good performance of Spain’s international tourism. Positive Impact from National Tourism Even though national tourism has not shown as many positive figures as the international one, it is helping the country to improve economically. As I explained before, a large number of Spaniards can’t afford to travel to another country during vacation. They decide to stay in the country, and look for new cheap ways of travelling. Spaniards are starting to purchase last minute deals, and to travel during low season periods. Even thought the number of national trips decreased by 1. 2% in 2012, Spain registered a growth of 22% in national tourism from 2008 to 2012 from 130 to 158. 9 million national trips (ITE, 2013). It can be deduced from this, that national tourism has had an overall positive performance during the Spanish recession. The fact that Spaniards choose national rather than international destinations makes them invest money in their own country’s economy. Moreover, even thought national tourism slightly decreased in 2012, new sectors of the Spanish national tourism have showed positive figures during the last few years. Juan Pulido and Pablo Garcia, members of the economics department at University of Jaen in Spain, explain that the rural sector of the Spanish national tourism has increased by 7. 5% in the last 10 years. Since Spaniards don’t want to spend too much money during vacation, they decide to stay in the country and look for new attractions. Spaniards spent a total of â‚ ¬18,046 million in rural destinations during 2011 (2011). Rural tourism is affecting positively the economy by activating some unusual tourism destinations, and giving them the opportunity to create a new emerging business in Spain. The increasing importance of this new way of tourism creates jobs and activates the economy of certain domestic areas. These new ways of doing tourism are making Spaniards stay in their country during their holidays, invest money in the national market, and contribute to the reactivation of the country’s economy. Key Points Spain is one of the countries that have been affected the most by the global economic crisis originated in 2008. However, there are several facts that explain how tourism is helping Spain to overcome this situation: Tourism represented a total contribution of 15. 2 % of Spain’s Gross Domestic Product in 2012. Tourism has a great impact in the performance of the Spanish economy. Spain has received more than 57 million international tourists during 2012, which mean it had a year-over-year growth of 2. 7%. There was a high new record of 56 billion Euros reached in spent by these international tourists that visited Spain in 2012. The number of workers hired in the Spanish tourism sector increased by 0. 6% in 2012. International tourism has also caused the growth of capital investment by 7. 4% to â‚ ¬14. 8 billion in Spain during 2012. Spain registered a growth of 22% in national tourism from 2008 to 2012, from 130 to 158. 9 million national trips. The fact that Spaniards are choosing national rather than international destinations makes Spaniards invest more money in the domestic economy. The rural sector of the Spanish national tourism has increased by 7. 5% in the last 10 years. This has created a new sector of tourism that creates jobs and gives opportunities to local areas to develop an emerging business. Conclusion The overall situation is perfectly described in an article written by Victor Barreira (2013), a journalist who works for El Pais, the most sold newspaper in Spain, which says: The national GDP fell by 1. 3% in 2012, unemployment raised to 26%, the bailout petition to the European Union was still active†¦ however, tourism is staying as a life-jacket to which Spain can keep held in order to ride out of the storm. It points out that the economic situation of Spain has affected the country in an extremely negative way. However, tourism has been the most important sector of the economy that has shown positive figures and has helped the country to better deal with the economic situation. It is important for the Spanish Government to keep working on the improvement of the country’s touristic attractions and promote Spain as a holiday destination. References Barreira, V. (2013, January 16). Espana registro en 2012 el tercer mejor ano de la historia en llegada de turistas [Spain registered in 2012 the third best year in history in arrival of tourists]. El Pais. Butler, M. (2013, February 27). Spain as an international tourist destination [Electronic version]. Atlas of the brands. Institute of Touristic Studies of Spain. (2013). Balance del turismo ano 2012 [Tourism balance year 2012]. Retrieved October 13, 2013, from www. iet. tourspain. es Pulido, P. , & Cardenas,P. (2011). El Turismo rural en Espana [The rural Tourism in Spain]. Asociacion de Geografos Espanoles. Villanueva, A. (2012). Las nuevas formas de turismo como instrumento para lograr un desarrollo sostenible e integrador [The new forms of tourism as a tool to reach a sostenible and integrative development]. Universidad de Castilla-La Mancha. World Travel and Tourism Council. (2013). Travel and Tourism, the economic impact 2013 in Spain. Scowsill, D.

A Man In The Middle Attack Computer Science Essay

A Man In The Middle Attack Computer Science Essay Today computer networks are used to transmit large amounts of data which may or may not contain sensitive information. Within this document I will be discussing ways in which your networks may become venerable to attacks. Man in the middle attacks, spanning tree attacks, security issues related to trunking, and security issues relating to identity spoofing. What is a Man in the middle attack? Man in the middle attack is a name given to a type of attack where the person intercepts communication being sent across a data network. This type of attack is also known as a Bucket-brigade attack, Fire brigade attack, Monkey-in-the-middle attack, Session hijacking, TCP hijacking, TCP session hijacking etc. Man in the middle attack is an attack that is usually performed on a internal network. Man in the middle attacks are where hackers introduce a rouge device onto the network then intercept communication between two network devices. This is done by sending out a series of ARP requests and ARP responses to two devices making them think that they are talking to each other. An example of a man in the middle attack would consist of two hosts, host one and host two. The hacker would connect a rouge device, host three, most likely on the same switch that both host one and two are connected to. Once that he is able to communicate on the network he would then send out ARP requests and responses to both host one and two making them believe that he is the other host. This will make host one and two re-route there connection through host three. once host one and host two are communicating between each other via the new connection established by host three, the hacker will now be able to capture packets sent between them. Once an attacker has performed a man in the middle attack, they can use this in a number of ways for example Public Key Exchanging, Command Injection, Malicious Code Injection, Downgrade Attacks etc. There are many tools available that network managers will use in order to monitor their networks. These tools can also be used from a hackers point of view as they allow the hacker to capture packets that are being sent across the network. This essentially allows the hacker to see what you are doing. The following tools are commonly used for capturing and analysing network traffic by an attacker WiresharkÂÂ ® is a network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It has a rich and powerful feature set and is world’s most popular tool of its kind. It runs on most computing platforms including Windows, OS X, Linux, and UNIX. Network professionals, security experts, developers, and educators around the world use it regularly. It is freely available as open source, and is released under the GNU General Public License version 2. http://wireshark.com Ettercap is a comprehensive suite for man in the middle attacks. It features sniffing of live connections, content filtering on the fly and many other interesting tricks. It supports active and passive dissection of many protocols and includes many features for network and host analysis.

'John Lewis' PORTERS FIVE SOURCES Essay Example | Topics and Well Written Essays - 500 words

'John Lewis' PORTERS FIVE SOURCES - Essay Example This is in consequence encompassed in an exceedingly enormous market hare that has not stopped to grow due to continuous demand. Alongside such factors, there are current global trends that have totaled up to the crisis; this is the fact that the recent global recession has grossly affected the market. In effect this has seen other players advance based on their competitive edge over the company. This has stiffened the competition and it is evident in the market shares trend. However, the consumer’s behavior in regards to priority over commodities may regulate this stiff competition. This is a force that is considered strong. Due to rigid competition, the force is intensified and hence strong. However, the corporation has within its structure stern measures to avert such competition. This includes high quality products which come with fair pricing strategy. In as much as there is a wide range of products that can be used as substitutes, this is however controlled by the competitive edge the current market has already established. This acts as one of the major strategies of the corporation for its expansion. This is one of the analytic forces which may be considered insignificant and hence weak. In this regard it is believed that the entry of a new force into the market may have meager consequences on te general effect to the market, especially if the forces already in the market are major ones. This is due to the fact that when there is a new force in the market, what they need is financial and human capital; sufficient enough to enable it grasp a considerable share of the market. However, recent developments like the recession may be thought of as reverting the expected trends. Generally, this is a force that is considered weak and also limiting. In this regard, it means that suppliers are always consistent in their attempts to identify with big companies that have wide market shares. This is to ensure that they have

Delve into the concept of the benefits in human development and Research Paper

Delve into the concept of the benefits in human development and leadership - Research Paper Example Therefore it is essential for all organizations to have a structured leadership and development program for the employees. The prosperity of any organization depends on how well the leadership qualities are instilled and how the skills can be developed. Research question How the development of leadership qualities among the employees is essential for the growth of the organization? Thesis Statement Incorporation of leadership training skills enhances the performance of the employees and thereby the progress of the organization. Overview This essay first makes a review of the various past researches and studies that have been conducted on this topic. Then a secondary research has been done to analyze the ways in which this development of the leadership skill is undertaken. Finally the research question has been addressed to provide an insight into the different kinds of issues that come up in the course of the study. Literature Review Various studies indicate that there are several es sential qualities that the leaders of any organization must possess. There are mainly eight of these qualities that contribute to the making of a successful leader. A leader must have the qualities of being communicative with the colleagues and the subordinates (Bartram, 2005). He must have the capability to support and cooperate with the other employees. Along with that he must have the skills of analyzing the situations and interpret them to the people concerned. A leader must have skills for organizing and carrying out the plans that he has formulated. For this a lot of creativity and enterprising ability is also required. Since an individual may not have all these qualities in the early stages of his career, a continuous development and training is necessary to groom these professionals into a successful leader. A leader cannot deliver his duties unless these qualities are inculcated into him in the right manner. If any opportunity for learning arises for the top or the middle l evel management the human resources department needs to find out the areas where the improvement of these individuals is essential. On the other hand according to some researchers it is indispensible for all organizations to run on a definite model of leadership competency (Hollenbeck, McCall and Silzer, 2006). Thus according to them a more comprehensive approach needs to be taken for pursuing effective leadership where the dimensions under various circumstances and in cases of personal behavior has to be taken. Thus under different situations leaders would take the path of different leadership styles. In most of the cases of limited communication between the top management and the junior management, the autocratic style of leadership would be adopted. On the other hand sometimes leaders prefer to be democratic or participative where the decision making power rests on the hands of the employees as much as it remains with the leader or the top officials. Thus specific continuum has b een provided for the different dimensions of leadership so that the leaders of a specific organization can be fit into a definite type. Hence a ideal leader should have a balance of all these qualities. Byrne and Rees in their study have provided and insight practical aspect of the development of leadership in any organization. They provided different

BHM 443 Legal Aspects of Health Care (Module 2CBT) Essay

BHM 443 Legal Aspects of Health Care (Module 2CBT) - Essay Example Care should be taken to review the details like filling time period, exclusivity, retaining medical records for defined period of time, and similar clauses. This section includes details of the period of the contract. Generally, the managed care contracts lock the parties for multiple years with consistent increase of charges each year. However, other terms and termination clauses may also be recorded in the managed care contract. Other details like address of health care provider, laws and regulations to be used in case of arbitration, rights of both parties in case of legal proceeding, etc. are documented in general provision section. It may also state other clauses like severability clause. This phase include gathering information about the plan, its scope, general market sentiments, and its applicability in provider's area. This assists in deciding if the provider wants to enter into a relationship with health plan; and also assist in contract formulation stage where bargaining power can increase if the parties have sufficient information about each other. This flows from information gathering phase. It is always good to know one's strengths and weaknesses. For example, if a health plan is new to an area, the provider can leverage this information to negotiate a better deal; as oppose to negotiating the same prices if the health plan is widely known and popular in the locality. Alternatively, if the health plan is in existence for years, the health provider may find it difficult to get any negotiating power while dealing with the health plan. The balance would thus be shifted towards health plan. Finances This is a sensitive area and warrants careful analysis before locking oneself up in a contract. This includes an assessment of health plan's fee schedule, capitation and other items that require both parties to jointly manage the risk. Some of the concern areas include capitation as per age, gender, employer specific capitation, financial incentives, etc. Financial evaluation may be termed as one of the most critical factors during contract negotiation stage and may be the showstopper if not carried out carefully. Contract A contract is the underlying legal document that defines the responsibilities, rights and obligations, termination clauses, etc. The final stage of contract negotiation is signing the contract. Care should be taken while reviewing contractual terms for both parties to determine if the contract is skewed towards one party. Additionally, all legally unenforceable clauses should be removed prior to signing the contract. What if a contract contains provisions for performing illegal activities If a contract contains provisions to allow illegal activities, then this contract is not enforceable by law. Thus, neither of the party is bound to do as obligated by the contract.

A Critique on the Kyoto Protocols Research Paper

A Critique on the Kyoto Protocols - Research Paper Example In the discourse, global warming was specifically defined as â€Å"climate change that causes an increase in the average temperature of the lower atmosphere.   Global warming can have many different causes, but it is most commonly associated with human interference, specifically the release of excessive amounts of greenhouse gases† (ibid.). With the alarming levels of greenhouse gases continuing to increase at an unprecedented pace, scientists all over the world drastically made efforts to inform the international organizations in charge of environmental protection. An international treaty, the United Nations Framework Convention on Climate Change (UNFCCC) deemed it of primary importance to address global warming issues through its governance and with the assistance of another international agreement, the Kyoto Protocol. According to the official website of UNFCCC, the Kyoto Protocol â€Å"sets binding targets for 37 industrialized countries and the European community for reducing greenhouse gas (GHG) emissions. These amount to an average of five percent against 1990 levels over the five-year period 2008-2012† (UNFCCC, 2010, par. 1). In this regard, the essay aims to proffer one’s personal opinion as to  what world leaders and the Intergovernmental Panel on Climate Change (IPCC) should agree on. Likewise, the essay seeks to address the following concerns, to wit: (1) is there a solution that they should commit to? If so, what is it? If not, then what should they do? (2) Why haven't the Kyoto Protocols worked? What has not worked and why? What has worked and why? (3) What should be the role of the US? And (4) what should be the role of China?   Diverse articles and publications on UNFCCC and Kyoto Protocol reveal that their primary thrust is â€Å"to stabilize greenhouse gas concentrations in the atmosphere at a level that will  prevent dangerous human interference with the climate system.  

Term paper Essay Example | Topics and Well Written Essays - 1750 words

Term paper - Essay Example It is not a simple task to sum up the framework of present day’s consumer in a singularly described procedure. Not just do consumers' personal requirements show a discrepancy on a case-by-case basis, but also as a collective whole, customers' requirements are growing and have turn out to be a lot more intricate and challenging as compared to previous generations. Businesses are always trying to find techniques to not just meet these high hopes, but also go beyond them. Customers want not only personalized answers to their queries, but are as well trying to find personalization in terms of the approach company and its representatives adopt to take care of them. 2. How do other businesses provide this? Personalized customer service is one of the single most essential factors most organizations fail to notice, although it is the single factor that can in fact create trust with their customers at every step. From the instant they approach the company’s outlet or representat ive to the instant they take delivery of their order, giving personalized customer service will let one’s clients make out that they are the most essential business asset (Barnes, 2000). It does not actually take a lot of creativity to offer this level of service to the clients. Simply think about their opinion. What are their expectations from the company? How do they want to be treated by the company’s representatives? When it is known what is expected from the company, the company should go ahead of it. Do not provide only the smallest levels of service; surpass them on every level of the customer experience. Some of the methods by which other companies are providing personalized customer services are: Computerizing to the extent that is feasible and make it simple to get information regarding the products or services they offer. Offering clients the ability to â€Å"help themselves† gets a lot of the sales stress off and let them come to a decision in their own time. Maintaining stability in customer service from the minute customer places the order to the final follow up, sending them a note following the sale, asking them how they like the performance of the company and if they are happy with the level of service. Offering â€Å"added value† services, for instance, complimentary upgrades or guides. Keeping the clients up to date even after the sale as well as keeping lines of communication open, although not including all the sales publicity every time. Applying a ‘customer first’ environment between the workers and checking that they are following all the way through. Making sure that the staff quickly deals with the complaints. Giving incentive to workers who go that extra mile to think about the customers. This produces an atmosphere of personalized customer service. 3. How have other businesses profited from this? Other businesses are getting profits from personalized customer service in the following ways: Co mpanies start to gain profit from personalized customer service the instant they give their sales team members the power to take decisions on the shop floor. Clients will

Strengths, Weaknesses and Plan of Action of an Analysis Essay

Strengths, Weaknesses and Plan of Action of an Analysis - Essay Example I have also been able to use a variety of sentence structures like simple, compound and complex sentence structures which help articulate my thoughts in a proper manner. Very short paragraphs keep the reader interested. I am also able to, as it shows by my draft, discuss both the sides of the issue so that the reader may be able to get a better idea about the positive and negative aspects of the issue at hand. It seems that I am very efficient in the presentation of my draft as the tone remains the same and all textual evidence is properly cited. It seems that I have been unable to specify a specific audience for my text. This may have led to some confusion for the reader as to for whom the text is really intended for. The text is not confusing in itself, but still, there should have been audience specification. I have not used any metaphors. The text seems to be less literary and more philosophical, which is something that many readers who are looking for some scholarly text might get disappointed about. Also, I have not used any external source which may have been necessary to back up my opinion. I have generalized the issue according to my own opinion, and there is no external source to support my argument. Other than these points, I have not come to know any noticeable weakness in the structure, layout and presentation in my text by way of my instructor’s and peer’s feedback. The first thing I need to revise is that I should incorporate some external sources in my text to back up my argument. I think it is very important as one is able to give more evidence to support one’s point of view. This involves research, and I must be able to do this by looking up for literary sources in the library and over the internet. I must, however, first consult my instructor to determine whether an external source is actually required in the first place. The second thing that I need to think upon is specifying my audience.

My Head and My Hear by Maria Cosway Article Example | Topics and Well Written Essays - 500 words

My Head and My Hear by Maria Cosway - Article Example From this discussion it is clear that  the heart admits that it is in grief and regrets all the actions t has done before. The counter argument is presented in a genius way by the heart implying that the heart can correct all the past mistakes. The head claims that the heart condemns others but still goes back to embrace and welcome them. On defense part, the hearts admits the mistakes and asks the head to provide any solution if any exists. The head fails to provide this demanded solution and it marks a failure on the part of the head.This essay stresses that another argument is raised relating to the moment when the head and the heart visited Legrand and Molinos. The head claims that it preferred the hearts opinion was not present when making decisions implying that the heart provided a wrong opinion contributing to a wrong decision. The head also claims that it was busy concentrating on constructive ideas while the heart was busy making friends and not contributing to meaningful development. The head claims that many friends took advantage of the hearts weakness to lie and pretend before the heart. The heart takes a chance to mock the events of the day that the head claimed to have done meaningful activities. In its mockery, the heart mocks the beautiful cities and the beautiful sceneries they both witnessed. According to the heart, the head did not do anything meaningful for that day.

Business Plan for a Real Estate Business in Bangladesh Essay Example for Free

Business Plan for a Real Estate Business in Bangladesh Essay It will make good quality flats for clients to live and enjoy lot more exclusive facilities. All these will be available at a very reasonable price. Since we believe in economies of scale. Slogan: â€Å"feel like living on heaven in every moment† Financing: To start up the business, Tk. 20 crores will be required, some additional needs to be financed by the bank. The loan will be repaid by five years. Confidentiality: This Business Plan is strictly confidential and is the property of the co-owners mentioned above. Any reproduction of the material inside will result is strictly prohibited. There has always been a good demand in the real estate market, and as the income level of the people of Bangladesh grows, that demand is surging even further. People want to buy unique, good-looking and attractive flats, but they want a good value for their money as well. That’s where we come in. We offer excellent quality flats, at reasonable prices. Another uniqueness of our business is that we have a separate line of apartments for office/bank use only. There is currently no such real estate companies in Bangladesh that offers an exclusive line of apartments. Therefore, in this segment, we can enjoy the benefits of being an oligopolist. On the other hand, we have the business-to-business prospect. Due to good economic growth, apartments are on the rise. Raihan with share of profit and loss according to ratio of equity invested. Together, we have gathered the necessary expertise required to run a real estate business. Initially, we will of course incur losses, but we plan to make profits in the fourth or fifth year. Real Estate Industry Analysis Industry Analysis: Real estate is a fixed, tangible and immovable asset in form of houses or commercial property. Real estate market involves developing, renting, selling/purchasing and renovating of these assets (houses). Market participants includes o Developers (contractors, engineers, and so on), o Facilitators (mortgage companies, real estate brokers, banks, anagement agents and so on), owners, renters (leasers) Each product (house) is unique in terms of buildings, location, and financing thus market has heterogeneous products. Transaction costs are high and the process is usually long. Though there are mobile homes, but the land underneath is till immobile, real estate is an immovable asset. Market Segmentations: The main factor that affects demand in real estate industry is demographic features. The demographic variables include population size and growth, cultural background, beliefs. However, other factors like income, price of housing, cost and availability of funds, consumer preference, supplier’s preference, price of substitutes and compliments. Future Outlook: One of the most startling statistics regarding real estate in this country, and a fact few people even realize, is that big portion of land in the Bangladesh is held either by the Government or is being used for agricultural purposes. The total farm area comprises about 62% of the total geographical area, forest area accounts for 15%, Perennial water 11% and urban area only 01%. The physical landscape is characterized by small arable fields. There are over 11 million farm holdings with more than 65 million fragments. The pattern of land ownership is highly skewed. 5% for the families having land above 7. 2 acres own 26% of the land and 70% of the families having land below 2. 5 acres own only 29% of the land. The per capita availability of crop land is at present only 0. 24 acre. Land utilization statistics indicate that 54% of the net cropped area is single cropped and area under double and triple cropping account for 72% of the gross cropped area. 20% of the total cropped areas have irrigation facilities. Yield is low i. e. rice -0. 703 metric ton per acre. Annual food deficit ranges between 1. 5 2. 0 million metric tons. Frequent natural calamities like cyclone, flood, drought, tidal bore etc. add to the shortfall of crops and livestock. What this means is that only few portion of the country is available to support all residential and commercial uses. This equates to nearly 1800 people per square mile of land by 2020. Despite the mortgage crisis and resulting financial meltdown of the last several years, these statistics seem to indicate that owning real estate in Bangladesh will continue to be a wise investment. In the very basic economic sense, there is no more land being created (limited supply) and more population density every day (increased demand). ? Economy: Growth in FY2010 was better than expected in April 2010 in Bangladesh, as a pickup in domestic demand neutralized the impact of weak expansion in exports. Inflation came in below the April projection, and the current account surplus was higher. For FY2011, this Update retains the outlook of a moderate uptick in growth, but with a slightly lower forecast for inflation and a larger fall in the current account surplus. To raise growth prospects, power and gas shortages need to be eliminated and reforms accelerated. More fundamentally, political stability will be critical to boosting growth. The bank’s Monetary Policy Statement (MPS), issued in July 2010, indicated that there may have been some diversion of private credit into consumer spending and into speculative investments in the stock market and real estate. . So we are expecting that, the economic condition in Bangladesh will be much better for business. If we also consider the given figures the scenario will be clear more.

Early Childhood Special Education Roots Essay Example for Free

Early Childhood Special Education Roots Essay Early childhood special education that is practiced today has a varied and sometimes hard won history. Its roots are entangled in cultural, economic, and idealistic influences; each facet tinged by the colored lens of the times and adding a little glint to modern day practices. The conglomeration of historical theories and practices, political actions and enacted laws has paved the way to modern early childhood special education practices and programming. Just like a child learns and builds on his knowledge and understanding of his environment, so too does the practice of early childhood special education. In its infancy ECSE was not labeled as such, and in fact was simply teaching. Throughout history, many educators have had differing perspectives and opinions on how best to educate children. Many of those ideas and practices have popularly endured, and some have become very small portions of our current systems, or faded into obscurity altogether. One of the earliest models on early childhood education was the Montessori model. The Montessori methods and tools are prevalent in classrooms today, from individualized and sensory programming to didactic learning materials. Other early educators realized that even very young children benefit from instruction. Jean Piaget identified stages of development from birth to adolescence that still assist educators in identifying appropriate modes of teaching. Others like Robert Owen, John Locke and Lev Semenovich Vygotsky theorized that a child’s environment had a profound influence on his/her development and education, giving a foundation for current early intervention strategies in impoverished, urban areas. Vygotsky also gifted to forward generations the theories of the Zone of Proximal Development, scaffolding and ideas about special needs students working in least restrictive environments. All the way from these LRE’s, are the ideas of institutions. The residential school model however is still useful in some ways today. Samuel Gridley Howe and Dorothea Dix implemented supportive, residential schools for children with disabilities, but when the First World War had its grips on the country, the schools deteriorated into holding cells that pervaded until throughout the depression era. Politics and societal situations have always been instigators of change for education. Post World War II, many war veterans returned home with disabilities changing the attitudes and urgency in servicing individuals with special needs, spurring a profusion of financial and program support. Moving into the mid-20th Century, civil rights opened a consciousness about not only race, but also a socioeconomic dichotomy. Project Head Start was federally funded compensatory program, with a focus on aiding the impoverished; it would later evolve into a more comprehensive program for seeking and aiding special needs children and families. Many other programs and studies aimed at supporting young children with disabilities and their families began to appear, including Early Head Start, the Carolina Abecedarian Project and the Perry Preschool Project, among others. These programs and research studies aimed at aiding and reinforcing the importance of early intervention for at risk children. Supporting and preemptively averting the struggles brought on by environmental disadvantages made the transition to special education support logical. With the social climate changing and an awareness of human rights, legislation regarding special needs populations was ripe. Perhaps the greatest catalyst to change was the enactment of PL 94-142 the Individuals with Disabilities Education Act of 1975. The foundations of this public law and the following amendments are the backbone of all special education as we know it today. This law has 6 main areas of concern. First, the right to a free and appropriate public education is bestowed. Throughout the coming decades, interpretation of FAPE comes up in many court cases, each ruling setting precedence for the future. Second, children with disabilities are given the right to learn in the least restrictive environment (LRE) a practice from centuries prior, but with legal backing, changed the model of public schools in this country. An Individualized Education Plan was written into the body of the IDEA, giving specific protocol for supporting the learning of each individual student. This item is the true workhorse of special education classrooms, bringing the student’s goals, objectives and educational plan, the educators, parents and the other support staff together in one document. The fourth premise of the IDEA is the guarantee to guardians of procedural due process, retaining the guardian’s rights regarding notices, evaluations, placements and other educational plans. Unbiased and multiple assessment criteria is the 5th area addressed in the IDEA. Lastly, part of the legislation includes the parents of special needs students, by affording them access to related services that would benefit the student. Related services was and is an area for interpretation, and again, many court cases have been tried and decided creating standards for what qualifies as a related service. Aside from these six main points, the IDEA has outlined much more. IDEA has given us a universal structure for classifying disabilities, and in a 1991 amendment, ruled that an umbrella classification for preschool aged children was acceptable and malleable state to state. This meant that children would not have to be prematurely labeled or stigmatized, when proper assessment was yet to be exacted. This law gave rise to the term â€Å"developmentally delayed†. A preschooler and his/her family could receive services under the classification of developmentally delayed. IDEA has also given individual states the leeway to define and exact methods of determining what developmentally delayed means. While culturally and regionally more specific, this leaves a large range of differences in qualifications across the country. Since its inception, individuals with special needs have reaped many benefits from the laws and boundaries set by the IDEA, but it wasn’t until October 1986 that very young special needs children and their families could be guaranteed services. While grants and incentives for states to serve the preschool population were available, participation in those programs were completely voluntary. The Education of the Handicapped Act Amendments, or PL 99-457, passed in October 1986, mandated that all special needs preschoolers between the ages of three and five be provided with a FAPE . This law was enacted with the purpose of enabling early intervention and a cost effective preventative strategy to serving special populations. Part C of this law also makes services for infants, birth to age two voluntary. Adding preschoolers to the population of compulsory service made the use of IFSP or Individualized Family Service Plans prevalent. These plans are similar to IEP’s except that they comprehensively include the family and give leeway to assigning the role of the service provider, enabling professionals who are most capable of assisting each family to act. Unlike and IEP, the IFSP must be reviewed at least every 6 months, ensuring relevancy with a quickly growing and changing child. Related services including counseling and classes are now extended to family members. By sharing the process and improvement with the preschoolers’ guardians, we are able to see much greater progress with cooperative engagement. Along with the IFSP, PL 99-457 saw the requirement of an Individualized Transition Plan, aiding young adults in making the change into adulthood. Fast forward to 1997, and PL 105-17 made some important amendments to the IDEA. Related services are expanded, developmentally delayed category can be applied up until age nine, parameters and process around discipline is set. Functional Behavior Assessments or Behavior Intervention Plans must be enacted when providing discipline to special education children. Also, assessments for qualifying for special education are expanded, and Child Find reaches into private schools to deliver services to more children. Along with these changes also came a change in funding based on census data versus enrollment data. The percentages served translated to a fixed amount of funding, averting a glut of over qualifying students. Lack of English Language proficiency is excluded as an area of qualification for services. This is important with the rising populations of English language learners. With the number of children from non-english speaking families on the rise, achievement gaps were widening. The No Child Left Behind Act in 2001 was drawn to support impoverished, special needs and English language learners. This act is directly responsible for the Amendments to IDEA that came in 2004. One of the most important changes made was that of aligning the standards of highly qualified special education teachers to the standards of the No Child Left Behind Act. Inclusion of ECE teachers is yet to be enacted, however. The field and study of Early Childhood Special Education is a deeply diverse and ever evolving practice. Past experience has dictated that social climates, politics, events and laws all contribute to the programming of ECSE. The gains have been great, with dramatic increases in the numbers of children and families found and served, but as a nation, we certainly have some more distance to travel. With current legislation and social issues ranging from secure schools to better serving working families, subsidized healthcare, immigration policies or revamping teacher evaluations, the future of Early Childhood Education is unwritten and open to influence.

Definitions of Multiprocessors in Computing

Definitions of Multiprocessors in Computing A multiprocessor can be defined as the computer which uses two or more processing units under the integrated control. Multi-processing is also defined as the way of using two or more than two CPUs within a single computer. As we all know that there are processors inside the computers, the multi processors, as the name indicates, have the ability to support more than one processor at a same time. Usually in multi-processing the processors are organized in the parallel form and hence a large number of the executions can be brought at the same time i.e. multi-processing helps in executing the same instructions a number of time at a particular time. Some other related definition of the multi processors are that multi-processing is the sharing of the execution process by the interconnection of more than one microprocessor using tightly or loosely couples technology. Usually multi-processing tasks carries two simultaneous steps. One is the performing the task of editing and the other is th e handling the data processing. A multi-processor device comprising, over a single semiconductor chip a plurality of processors including a first group of processors and a second group of processors; a first bus to which the first group of processors is coupled; a second bus to which the second group of processors is coupled; a first external bus interface to which the first bus is coupled; and a second external bus interface to which the second bus is coupled. The term multiprocessing is also used to refer to a computer that has many independent processing elements. The processing elements are almost full computers in their own right. The main difference is that they have been freed from the encumbrance of communication with peripherals. MULTIPROCESSORS IN THE TERMS OF ARCHITECTURE The processors are usually made up of the small and medium scale ICs which usually contains a less or large number of the transistors. The multi processors involves a computer architecture Most common multiprocessor systems today use an SMP architecture. In the case of multi-core processors, the SMP architecture applies to the cores, treating them as separate processors. SMP systems allow any processor to work on any task no matter where the data for that task are located in memory; with proper operating system support, SMP systems can easily move tasks between processors to balance the workload efficiently. Benefits Increased processing power Scale resource use to application requirements Additional operating system responsibilities All processors remain busy Even distribution of processes throughout the system All processors work on consistent copies of shared data Execution of related processes synchronized Mutual exclusion enforced Multiprocessing is a type of processing in which two or more processors work together to process more than one program simultaneously. Multi processor systems have more than one processor thats why known as multi processor systems. In multiprocessor system there is one master processor and other are the Slave. If one processor fails then master can assign the task to other slave processor. But if Master will be fail than entire system will fail. Central part of Multiprocessor is the Master. All of them share the hard disk and Memory and other memory devices. Examples of multiprocessors 1. Quad-Processor Pentium Pro SMP, bus interconnection. 4 x 200 MHz Intel Pentium Pro processors. 8 + 8 Kb L1 cache per processor. 512 Kb L2 cache per processor. Snoopy cache coherence. Compaq, HP, IBM, NetPower. Windows NT, Solaris, Linux, etc. 2. SGI Origin 2000 NUMA, hypercube interconnection. Up to 128 (64 x 2) MIPS R 10000 processors. 32 + 32 Kb L1 cache per processor. 4 Mb L2 cache per processor. Distributed directory-based cache coherence. Automatic page migration/replication. SGI IRIX with Pthreads Classifications of multiprocessor architecture Nature of data path Interconnection scheme How processors share resources Message-Passing Architectures Separate address space for each processor. Processors communicate via message passing. B) Shared-Memory Architectures Single address space shared by all processors. Processors communicate by memory read/write. SMP or NUMA. Cache coherence is important issue. 1. Classifying Sequential and Parallel Architectures(DATA PATH) Stream: sequence of bytes Data stream Instruction stream Flynns classifications: MISD multiprocessing: MISD multiprocessing offers mainly the advantage of redundancy, since multiple processing units perform the same tasks on the same data, reducing the chances of incorrect results if one of the units fails. MISD architectures may involve comparisons between processing units to detect failures. Apart from the redundant and fail-safe character of this type of multiprocessing, it has few advantages, and it is very expensive. It does not improve performance. It can be implemented in a way that is transparent to software. It is used inarray processorsand is implemented in fault tolerant machines. MIMD multiprocessing: MIMD multiprocessing architecture is suitable for a wide variety of tasks in which completely independent and parallel execution of instructions touching different sets of data can be put to productive use. For this reason, and because it is easy to implement, MIMD predominates in multiprocessing. Processing is divided into multiplethreads, each with its own hardware processor state, within a single software-defined process or within multiple processes. Insofar as a system has multiple threads awaiting dispatch (either system or user threads), this architecture makes good use of hardware resources. MIMD does raise issues of deadlock and resource contention, however, since threads may collide in their access to resources in an unpredictable way that is difficult to manage efficiently. MIMD requires special coding in the operating system of a computer but does not require application changes unless the programs themselves use multiple threads (MIMD is transparent to single-threaded programs under most operating systems, if the programs do not voluntarily relinquish control to the OS). Both system and user software may need to use software constructs such assemaphores(also called locksorgates) to prevent one thread from interfering with another if they should happen to cross paths in referencing the same data. This gating or locking process increases code complexity, lowers performance, and greatly increases the amount of testing required, although not usually enough to negate the advantages of multiprocessing. Similar conflicts can arise at the hardware level between processors (cache contention and corruption, for example), and must usually be resolved in hardware, or with a combination of software and hardware (e.g.,cache-clear instructions). SISD multiprocessing: In asingle instruction stream, single data streamcomputer one processor sequentially processes instructions, each instruction processes one data item. SIMD multiprocessing: In asingle instruction stream, multiple data streamcomputer one processor handles a stream of instructions, each one of which can perform calculations in parallel on multiple data locations. SIMD multiprocessing is well suited toparallel or vector processing, in which a very large set of data can be divided into parts that are individually subjected to identical but independent operations. A single instruction stream directs the operation of multiple processing units to perform the same manipulations simultaneously on potentially large amounts of data. For certain types of computing applications, this type of architecture can produce enormous increases in performance, in terms of the elapsed time required to complete a given task. However, a drawback to this architecture is that a large part of the system falls idle when programs or system tasks are executed that cannot be divided into units that can be processed in parallel. 2. Interconnection scheme Describes how the systems components, such as processors and memory modules, are connected Consists of nodes (components or switches) and links (connections) Parameters used to evaluate interconnection schemes Node degree Bisection width Network diameter Cost of the interconnection scheme Shared bus Single communication path between all nodes Contention can build up for shared bus Fast for small multiprocessors Form supernodes by connecting several components with a shared bus; use a more scalable interconnection scheme to connect supernodes Dual-processor Intel Pentium Shared bus multiprocessor organization. Crossbar-switch matrix Separate path from every processor to every memory module (or from every to every other node when nodes consist of both processors and memory modules) High fault tolerance, performance and cost Sun UltraSPARC-III Crossbar-s witch matrix multiprocessor organization. Hypercube n -dimensional hypercube has 2 nodes in which each node is n connected to n neighbor nodes Faster, more fault tolerant, but more expensive than a 2-D mesh network n CUBE (up to 8192 processors) Multistage network Switch nodes act as hubs routing messages between nodes Cheaper, less fault tolerant, worse performance compared to a crossbar-switch matrix IBM POWER4 COUPLING of PROCESSORS Tightly coupled systems Processors share most resources including memory Communicate over shared buses using shared physical memory Tasks and/or processors communicate in a highly synchronized fashion Communicates through a common shared memory Shared memory system Loosely coupled systems Processors do not share most resources Most communication through explicit messages or shared virtual memory (although not shared physical memory) Tasks or processors do not communicate in a synchronized fashion Communicates by message passing packets Overhead for data exchange is high Distributed memory system Comparison between them Loosely coupled systems: more flexible, fault tolerant, scalable Tightly coupled systems: more efficient, less burden to operating system programmers Multiprocessor Operating System Organizations Classify systems based on how processors share operating system responsibilities Types: Master/slave Separate kernels Symmetrical organization 1) Master/slave organization Master processor executes the operating system Slaves execute only user processors Hardware asymmetry Low fault tolerance Good for computationally intensive jobs 2) Separate kernels organization Each processor executes its own operating system Some globally shared operating system data Loosely coupled Catastrophic failure unlikely, but failure of one processor results in termination of processes on that processor Little contention over resources Example: Tandem system 3) Symmetrical organization Operating system manages a pool of identical processors High amount of resource sharing Need for mutual exclusion Highest degree of fault tolerance of any organization Some contention for resources Example: BBN Butterfly Memory Access Architectures Can classify multiprocessors based on how processors share memory Goal: Fast memory access from all processors to all memory Contention in large systems makes this impractical 1) Uniform memory access (UMA) multiprocessor All processors share all memory Access to any memory page is nearly the same for all processors and all memory modules (disregarding cache hits) Typically uses shared bus or crossbar-switch matrix Also called symmetric multiprocessing (SMP) Small multiprocessors (typically two to eight processors) 2) Nonuniform memory access (NUMA) multiprocessor Each node contains a few processors and a portion of system memory, which is local to that node Access to local memory faster than access to global memory (rest of memory) More scalable than UMA (fewer bus collisions) 3) Cache-only memory architecture (COMA) multiprocessor Physically interconnected as a NUMA is Local memory vs. global memory Main memory is viewed as a cache and called an attraction memory (AM) Allows system to migrate data to node that most often accesses it at granularity of a memory line (more efficient than a memory page) Reduces the number of cache misses serviced remotely Overhead Duplicated data items Complex protocol to ensure all updates are received at all processors 4) No-remote-memory-access (NORMA) multiprocessor Does not share physical memory Some implement the illusion of shared physical memory shared virtual memory (SVM) Loosely coupled Communication through explicit messages Distributed systems Not networked system Features of the multiprocessors Many multiprocessors share one address space They conceptually share memory. Sometimes it is often implemented just like a multicomputer In it the communication is implicit. It reads and writes access to the shared memories. Usually the multi processors are characterized by the complex behaviour. The MPU handles high-level tasks, including axis profile generation, host/controller communication, user-program execution, and safety event handling. Advanced real time algorithm and special filter execution Digital encoder input up to 20 million counts per second Analog Sin-Cos encoder input and interpolation up to a multiplication factor of 65,536 Fast, high-rate Position Event Generator (PEG) to trigger external devices Fast position registration (Mark) to capture position on input event High resolution analog or PWM command generation to the drive High Speed Synchronous Interface channel (HSSI) to manage fast communication with remote axes or I/O expansion modules Advantages of Multiprocessor Systems Some advantages of multiprocessor system are as follows: Reduced Cost: Multiple processors share the same resources. Separate power supply or mother board for each chip is not required. This reduces the cost. Increased Reliability: The reliability of system is also increased. The failure of one processor does not affect the other processors though it will slow down the machine. Several mechanisms are required to achieve increased reliability. If a processor fails, a job running on that processor also fails. The system must be able to reschedule the failed job or to alert the user that the job was not successfully completed. More work: As we increase the number of processors then it means that more work can be done in less time. Id more than one processor cooperates on a task then they will take less time to complete it. If we divide functions among several processors, then if one processor fails then it will not affect the system or we can say it will not halt the system, but it will effect on the work speed. Suppose I have five processors and one of them fails due to some reasons then each of the remaining four processors will share the work of failed processor. So it means that system will not fail but definitely failed processor will effect on its speed. If you pay attention on the matter of which save much money among multi-processor systems and multiple single-processor systems then you will know that multiprocessor systems save moremoneythan multiple single-processor systems because they can share power supplies, memory and peripherals. Increased Throughput: An increase in the number of processes completes the work in less time. It is important to note that doubling the number of processors does not halve the time to complete a job. It is due to the overhead in communication between processors and contention for shared resources etc. Reference BOOKS Referred: Morris Mano, Computer System Architecture, Prentice Hall, 2007