Traditions and Values in American Education :: Learning Schooling College Papers

Traditions and Values in American Education The question of whether colleges and universities serve to pass on to students the great traditions and values of Western culture is one of many issues that I would like to discuss as it pertains to my high school teaching. The Presence of Others has given me the opportunity to read the opinions of several educational thinkers on this subject, and from them I have formed a clearer idea about the value of a broad education which would necessarily include the traditions and values of Western culture. To begin with, I should like to discuss Cardinal Newman, who in the 19th century argues for liberal studies because he felt that education is preparation for life. Its purpose is to train the mind for whatever problems arise in an individual's future by grounding him in cultural traditions and values. He describes a liberal education in the following way: "A habit of mind is formed which lasts through life, of which the attributes are, freedom, equitableness, calmness, or what in a former Discourse I have ventured to call a philosophical habit."(Lunsford & Ruszkiewicz 48). I very much agree with this idea. In my opinion a student should be educated broadly, not like me, for instance, who was very well trained in math but not prepared for anything else, and now I am finding it hard to fill in the empty spaces, but the need to know more and learn more is strong in me, so I keep trying. But the point is that even though I am educated, I feel ignorant . That's my reason for saying that students in high school and university should get a broad education. And I am happy that my children have not been trapped by a special talent as I was, and that they are interested in the every area of their education equally. They will be getting the education that I was denied; and they will learn the traditions and values through their history and literature classes, for example, which will better prepare them for life here in the United States especially, where citizens must be able t o participate in the democratic process. I will use as an example my son Gagik, who was enrolled in the magnet law program at Monroe High School. But even though he wasn't in a mth program, neverthless, he was able to take higher math up through calculus.

The Mind-Body Connection Essay -- essays research papers fc

Overview This paper will discuss the mind-body connection and it's relevance to health care professionals and to the public. It will explore the history of the mind-body connection, as well as state research that has been done on the subject. The reader will gain an understanding of the various techniques used in mind-body therapy, as well as their effectiveness. What is the Mind-Body Connection? It is the idea that the mind and body are not separate entities. Rather, they are intricately connected, interacting with each other in many ways. The body's three main regulatory systems are the central nervous system (which includes the brain), the endocrine system (which produces hormones), and the immune system. These three systems work together and affect one another. Researchers who study the mind-body connection examine these interactions, and are particularly interested in the effects of emotions and thoughts on physical health. History of the Mind-Body Connection The concept of the interconnection between the brain and body has been around for quite a while. Ancient healing practices, such as Traditional Chinese Medicine and Ayurvedic medicine emphasized important links between the mind and body. Hippocrates once wrote: "The natural healing force within each one of us is the greatest force in getting well." This statement reflects the belief of ancient philosophers that emotions and health are deeply connected. In later centuries, however, this belief was cast aside. Medical professionals focused on identifying and treating symptoms through physical means such as drugs and surgery, and mostly ignored the role of mental states in the prevention and treatment of disease. To most doctors, the immune system was regarded as an autonomous entity, operating independently of the mind and behavior. Since the 1960's, however, researchers have realized that these ideas are incorrect, and have since been looking at the mind-body connection more closely and with more respect. In 1964, George Solomon, a psychiatrist, noticed that rheumatoid arthritis worsened when people were depressed. He was fascinated by this connection, and began to investigate the impact of emotions on inflammation and immune function in general. His studies were the beginning of the new field of psychoneuroimmunology, which examines the relationships between the mind (psyche), bra... ...f good health in both areas, and learn to take care of their bodies and brains by keeping active, sleeping properly, eating nutritiously, and taking time to relax. Furthermore, people should understand that moods matter, not just to mental health, but to phsyical health as well. If someone is suffering from and emotional illness such as depression or anxiety, they should seek treatment, since evidence is mounting that these conditions can lead to physical illness and a shorter life. Bibliography Books: Martin, P. (1997). The Healing Mind. St. Martin's Press. Mate, G. (2003). When the Body Says No. Hoboken, NJ: John Wiley & Sons, Inc. Websites: http://www.ajc.com/health/altmed/shared/health/alt_medicine/ConsModalities/MindBody http://www.healthyroads.com/myhealth/content/mindbody/articles/art_MindBodyTherapyOverviewOfHealingMethods.asp Journals: Latorre, M. (2000). A Holistic View of Psychotherapy: Connecting Mind, Body, and Spirit. Perspectives in Psychiatric Care, 36:2, 67-68. Simon, D. (2004). Practicing Mind-Body-Soul Medicine. Alternative Therapies, 10:6, 62-68. Wolsko et al. (2004). Mind-Body Medical Therapies. Journal of General Internal Medicine, 19, 43-49.

Chapter 33 The Death Eaters

Voldemort looked away from Harry and began examining his own body. His hands were like large, pale spiders; his long white fingers caressed his own chest, his arms, his face; the red eyes, whose pupils were slits, like a cats, gleamed still more brightly through the darkness. He held up his hands and flexed the fingers, his expression rapt and exultant. He took not the slightest notice of Wormtail, who lay twitching and bleeding on the ground, nor of the great snake, which had slithered back into sight and was circling Harry again, hissing. Voldemort slipped one of those unnaturally long-fingered hands into a deep pocket and drew out a wand. He caressed it gently too; and then he raised it, and pointed it at Wormtail, who was lifted off the ground and thrown against the headstone where Harry was tied; he fell to the foot of it and lay there, crumpled up and crying. Voldemort turned his scarlet eyes upon Harry, laughing a high, cold, mirthless laugh. Wormtail's robes were shining with blood now; he had wrapped the stump of his arm in them. â€Å"My Lord†¦Ã¢â‚¬  he choked, â€Å"my Lord†¦you promised†¦you did promise†¦Ã¢â‚¬  â€Å"Hold out your arm,† said Voldemort lazily. â€Å"Oh Master†¦thank you, Master†¦Ã¢â‚¬  He extended the bleeding stump, but Voldemort laughed again. â€Å"The other arm, Wormtail.† â€Å"Master, please†¦please†¦Ã¢â‚¬  Voldemort bent down and pulled out Wormtail's left arm; he forced the sleeve of Wormtail's robes up past his elbow, and Harry saw something upon the skin there, something like a vivid red tattoo – a skull with a snake protruding from its mouth – the image that had appeared in the sky at the Quidditch World Cup: the Dark Mark. Voldemort examined it carefully, ignoring Wormtail's uncontrollable weeping. â€Å"It is back,† he said softly, â€Å"they will all have noticed it†¦and now, we shall see†¦now we shall know†¦Ã¢â‚¬  He pressed his long white forefinger to the brand on Wormtail's arm. The scar on Harry's forehead seared with a sharp pain again, and Wormtail let out a fresh howl; Voldemort removed his fingers from Wormtail's mark, and Harry saw that it had turned jet black. A look of cruel satisfaction on his face, Voldemort straightened up, threw back his head, and stared around at the dark graveyard. â€Å"How many will be brave enough to return when they feel it?† he whispered, his gleaming red eyes fixed upon the stars. â€Å"And how many will be foolish enough to stay away?† He began to pace up and down before Harry and Wormtail, eyes sweeping the graveyard all the while. After a minute or so, he looked down at Harry again, a cruel smile twisting his snakelike face. â€Å"You stand, Harry Potter, upon the remains of my late father,† he hissed softly. â€Å"A Muggle and a fool†¦very like your dear mother. But they both had their uses, did they not? Your mother died to defend you as a child†¦and I killed my father, and see how useful he has proved himself, in death†¦.† Voldemort laughed again. Up and down he paced, looking all around him as he walked, and the snake continued to circle in the grass. â€Å"You see that house upon the hillside, Potter? My father lived there. My mother, a witch who lived here in this village, fell in love with him. But he abandoned her when she told him what she was†¦.He didn't like magic, my father†¦ â€Å"He left her and returned to his Muggle parents before I was even born. Potter, and she died giving birth to me, leaving me to be raised in a Muggle orphanage†¦but I vowed to find him†¦I revenged myself upon him, that fool who gave me his name†¦Tom Riddle†¦.† Still he paced, his red eyes darting from grave to grave. â€Å"Listen to me, reliving family history†¦Ã¢â‚¬  he said quietly, â€Å"why, I am growing quite sentimental†¦.But look, Harry! My true family returns†¦.† The air was suddenly full of the swishing of cloaks. Between graves, behind the yew tree, in every shadowy space, wizards were Apparating. All of them were hooded and masked. And one by one they moved forward†¦slowly, cautiously, as though they could hardly believe their eyes Voldemort stood in silence, waiting for them. Then one of the Death Eaters fell to his knees, crawled toward Voldemort and kissed the hem of his black robes. â€Å"Master†¦Master†¦Ã¢â‚¬  he murmured. The Death Eaters behind him did the same; each of them approaching Voldemort on his knees and kissing his robes, before backing away and standing up, forming a silent circle, which enclosed Tom Riddle's grave, Harry, Voldemort, and the sobbing and twitching heap that was Wormtail. Yet they left gaps in the circle, as though waiting for more people. Voldemort, however, did not seem to expect more. He looked around at the hooded faces, and though there was no wind rustling seemed to run around the circle, as though it had shivered. â€Å"Welcome, Death Eaters,† said Voldemort quietly. â€Å"Thirteen years†¦thirteen years since last we met. Yet you answer my call as though it were yesterday, we are still united under the Dark Mark, then! Or are we?† He put back his terrible face and sniffed, his slit-like nostrils widening. â€Å"I smell guilt,† he said. â€Å"There is a stench or guilt upon the air. A second shiver ran around the circle, as though each member of it longed, but did not dare to step back from him. â€Å"I see you all, whole and healthy, with your powers intact – such prompt appearances! and I ask myself†¦why did this band of wizards never come to the aid of their master, to whom they swore eternal loyalty?† No one spoke. No one moved except Wormtail, who was upon the ground, still sobbing over his bleeding arm. â€Å"And I answer myself,† whispered Voldemort, â€Å"they must have believed me broken, they thought I was gone. They slipped back among my enemies, and they pleaded innocence, and ignorance, and bewitchment †¦. â€Å"And then I ask myself, but how could they have believed I would not rise again? They, who knew the steps I took, long ago, to guard myself against mortal death? They, who had seen proofs of the immensity of my power in the times when I was mightier than any wizard living? â€Å"And I answer myself, perhaps they believed a still greater power could exist, one that could vanquish even Lord Voldemort†¦perhaps they now pay allegiance to another†¦perhaps that champion of commoners, of Mudbloods and Muggles, Albus Dumbledore?† At the mention of Dumbledore's name, the members of the circle stirred, and some muttered and shook their heads. Voldemort ignored them. â€Å"It is a disappointment to me†¦I confess myself disappointed†¦.† One of the men suddenly flung himself forward, breaking the circle. Trembling from head to foot, he collapsed at Voldemort's feet. â€Å"Master!† he shrieked, â€Å"Master, forgive me! Forgive us all!† Voldemort began to laugh. He raised his wand. â€Å"Crucio!† The Death Eater on the ground writhed and shrieked; Harry was sure the sound must carry to the houses around†¦.Let the police come, he thought desperately†¦anyone†¦anything†¦ Voldemort raised his wand. The tortured Death Eater lay flat upon the ground, gasping. â€Å"Get up, Avery,† said Voldemort softly. â€Å"Stand up. You ask for forgiveness? I do not forgive. I do not forget. Thirteen long years†¦I want thirteen years' repayment before I forgive you. Wormtail here has paid some of his debt already, have you not, Wormtail?† He looked down at Wormtail, who continued to sob. â€Å"You returned to me, not out of loyalty, but out of fear of your old friends. You deserve this pain, Wormtail. You know that, don't you?† â€Å"Yes, Master,† moaned Wormtail, â€Å"please. Master†¦please†¦Ã¢â‚¬  â€Å"Yet you helped return me to my body,† said Voldemort coolly, watching Wormtail sob on the ground. â€Å"Worthless and traitorous as you are, you helped me†¦and Lord Voldemort rewards his helpers†¦.† Voldemort raised his wand again and whirled it through the air. A streak of what looked like molten silver hung shining in the wand's wake. Momentarily shapeless, it writhed and then formed itself into a gleaming replica of a human hand, bright as moonlight, which soared downward and fixed itself upon Wormtail's bleeding wrist. Wormtail's sobbing stopped abruptly. His breathing harsh and ragged, he raised his head and stared in disbelief at the silver hand, now attached seamlessly to his arm, as though he were wearing a dazzling glove. He flexed the shining fingers, then, trembling, picked up a small twig on the ground and crushed it into powder. â€Å"My Lord,† he whispered. â€Å"Master†¦it is beautiful†¦thank you†¦thank you†¦.† He scrambled forward on his knees and kissed the hem of Voldemort's robes. â€Å"May your loyalty never waver again, Wormtail,† said Voldemort. â€Å"No, my Lord†¦never, my Lord†¦Ã¢â‚¬  Wormtail stood up and took his place in the circle, staring at his powerful new hand, his face still shining with tears. Voldemort now approached the man on Wormtail's right. â€Å"Lucius, my slippery friend,† he whispered, halting before him. â€Å"I am told that you have not renounced the old ways, though to the world you present a respectable face. You are still ready to take the lead in a spot of Muggle-torture, I believe? Yet you never tried to find me, Lucius†¦.Your exploits at the Quidditch World Cup were fun, I daresay†¦but might not your energies have been better directed toward finding and aiding your master?† â€Å"My Lord, I was constantly on the alert,† came Lucius Malfoy's voice swiftly from beneath the hood. â€Å"Had there been any sign from you, any whisper of your whereabouts, I would have been at your side immediately, nothing could have prevented me -â€Å" â€Å"And yet you ran from my Mark, when a faithful Death Eater sent it into the sky last summer?† said Voldemort lazily, and Mr. Malfoy stopped talking abruptly. â€Å"Yes, I know all about that, Lucius†¦.You have disappointed me†¦.I expect more faithful service in the future.† â€Å"Of course, my Lord, of course†¦.You are merciful, thank you†¦.† Voldemort moved on, and stopped, staring at the space – large enough for two people – that separated Malfoy and the next man. â€Å"The Lestranges should stand here,† said Voldemort quietly. â€Å"But they are entombed in Azkaban. They were faithful. They went to Azkaban rather than renounce me†¦.When Azkaban is broken open, the Lestranges will be honored beyond their dreams. The dementors will join us†¦they are our natural allies†¦we will recall the banished giants†¦I shall have all my devoted servants returned to me, and an army of creatures whom all fear†¦.† He walked on. Some of the Death Eaters he passed in silence, but he paused before others and spoke to them. â€Å"Macnair†¦destroying dangerous beasts for the Ministry of Magic now, Wormtail tells me? You shall have better victims than that soon, Macnair. Lord Voldemort will provide†¦.† â€Å"Thank you, Master†¦thank you,† murmured Macnair. â€Å"And here† – Voldemort moved on to the two largest hooded figures – â€Å"we have Crabbe†¦you will do better this time, will you not, Crabbe? And you, Goyle?† They bowed clumsily, muttering dully. â€Å"Yes, Master†¦Ã¢â‚¬  â€Å"We will, Master†¦.† â€Å"The same goes for you, Nott,† said Voldemort quietly as he walked past a stooped figure in Mr. Goyles shadow. â€Å"My Lord, I prostrate myself before you, I am your most faithful -â€Å" â€Å"That will do,† said Voldemort. He had reached the largest gap of all, and he stood surveying it with his blank, red eyes, as though he could see people standing there. â€Å"And here we have six missing Death Eaters†¦three dead in my service. One, too cowardly to return†¦he will pay. One, who I believe has left me forever†¦he will be killed, of course†¦and one, who remains my most faithful servant, and who has already reentered my service.† The Death Eaters stirred, and Harry saw their eyes dart sideways at one another through their masks. â€Å"He is at Hogwarts, that faithful servant, and it was through his efforts that our young friend arrived here tonight†¦. â€Å"Yes,† said Voldemort, a grin curling his lipless mouth as the eyes of the circle flashed in Harry's direction. â€Å"Harry Potter has kindly joined us for my rebirthing party. One might go so far as to call him my guest of honor.† There was a silence. Then the Death Eater to the right of Wormtail stepped forward, and Lucius Malfoy's voice spoke from under the mask. â€Å"Master, we crave to know†¦we beg you to tell us†¦how you have achieved this†¦this miracle†¦how you managed to return to us†¦.† â€Å"Ah, what a story it is, Lucius,† said Voldemort. â€Å"And it begins – and ends – with my young friend here.† He walked lazily over to stand next to Harry, so that the eyes of the whole circle were upon the two of them. The snake continued to circle. â€Å"You know, of course, that they have called this boy my downfall?† Voldemort said softly, his red eyes upon Harry, whose scar began to burn so fiercely that he almost screamed in agony. â€Å"You all know that on the night I lost my powers and my body, I tried to kill him. His mother died in the attempt to save him – and unwittingly provided him with a protection I admit I had not foreseen†¦.I could not touch the boy.† Voldemort raised one of his long white fingers and put it very close to Harry's cheek. â€Å"His mother left upon him the traces other sacrifice†¦.This is old magic, I should have remembered it, I was foolish to overlook it†¦but no matter. I can touch him now.† Harry felt the cold tip of the long white finger touch him, and thought his head would burst with the pain. Voldemort laughed softly in his ear, then took the finger away and continued addressing the Death Eaters. â€Å"I miscalculated, my friends, I admit it. My curse was deflected by the woman's foolish sacrifice, and it rebounded upon myself. Aaah†¦pain beyond pain, my friends; nothing could have prepared me for it. I was ripped from my body, I was less than spirit, less than the meanest ghost†¦but still, I was alive. What I was, even I do not know†¦I, who have gone further than anybody along the path that leads to immortality. You know my goal – to conquer death. And now, I was tested, and it appeared that one or more of my experiments had worked†¦for I had not been killed, though the curse should have done it. Nevertheless, I was as powerless as the weakest creature alive, and without the means to help myself†¦for I had no body, and every spell that might have helped me required the use of a wand†¦. â€Å"I remember only forcing myself, sleeplessly, endlessly, second by second, to exist†¦.I settled in a faraway place, in a forest, and I waited†¦.Surely, one of my faithful Death Eaters would try and find me†¦one of them would come and perform the magic I could not, to restore me to a body†¦, but I waited in vain†¦.† The shiver ran once more around the circle of listening Death Eaters. Voldemort let the silence spiral horribly before continuing. â€Å"Only one power remained to me. I could possess the bodies of others. But I dared not go where other humans were plentiful, for I knew that the Aurors were still abroad and searching for me. I sometimes inhabited animals – snakes, of course, being my preference – but I was little better off inside them than as pure spirit, for their bodies were ill adapted to perform magic†¦and my possession of them shortened their lives; none of them lasted long†¦. â€Å"Then†¦four years ago†¦the means for my return seemed assured. A wizard – young, foolish, and gullible – wandered across my path in the forest I had made my home. Oh, he seemed the very chance I had been dreaming of†¦for he was a teacher at Dumbledore's school†¦he was easy to bend to my will†¦he brought me back to this country, and after a while, I took possession of his body, to supervise him closely as he carried out my orders. But my plan failed. I did not manage to steal the Sorcerer's Stone. I was not to be assured immortal life. I was thwarted†¦thwarted, once again, by Harry Potter†¦.† Silence once more; nothing was stirring, not even the leaves on the yew tree. The Death Eaters were quite motionless, the glittering eyes in their masks fixed upon Voldemort, and upon Harry. â€Å"The servant died when I left his body, and I was left as weak as ever I had been,† Voldemort continued. â€Å"I returned to my hiding place far away, and I will not pretend to you that I didn't then fear that I might never regain my powers†¦.Yes, that was perhaps my darkest hour†¦I could not hope that I would be sent another wizard to possess†¦and I had given up hope, now, that any of my Death Eaters cared what had become of me†¦.† One or two of the masked wizards in the circle moved uncomfortably, but Voldemort took no notice. â€Å"And then, not even a year ago, when I had almost abandoned hope, it happened at last†¦a servant returned to me. Wormtail here, who had faked his own death to escape justice, was driven out of hiding by those he had once counted friends, and decided to return to his master. He sought me in the country where it had long been rumored I was hiding†¦helped, of course, by the rats he met along the way. Wormtail has a curious affinity with rats, do you not, Wormtail? His filthy little friends told him there was a place, deep in an Albanian forest, that they avoided, where small animals like themselves had met their deaths by a dark shadow that possessed them†¦. â€Å"But his journey back to me was not smooth, was it, Wormtail? For, hungry one night, on the edge of the very forest where he had hoped to find me, he foolishly stopped at an inn for some food†¦and who should he meet there, but one Bertha Jorkins, a witch from the Ministry of Magic. â€Å"Now see the way that fate favors Lord Voldemort. This might have been the end of Wormtail, and of my last hope for regeneration. But Wormtail – displaying a presence of mind I would never have expected from him – convinced Bertha Jorkins to accompany him on a nighttime stroll. He overpowered her†¦he brought her to me. And Bertha Jorkins, who might have ruined all, proved instead to be a gift beyond my wildest dreams†¦for – with a little persuasion – she became a veritable mine of information. â€Å"She told me that the Triwizard Tournament would be played at Hogwarts this year. She told me that she knew of a faithful Death Eater who would be only too willing to help me, if I could only contact him. She told me many things†¦but the means I used to break the Memory Charm upon her were powerful, and when I had extracted all useful information from her, her mind and body were both damaged beyond repair. She had now served her purpose. I could not possess her. I disposed of her.† Voldemort smiled his terrible smile, his red eyes blank and pitiless. â€Å"Wormtail's body, of course, was ill adapted for possession, as all assumed him dead, and would attract far too much attention if noticed. However, he was the able-bodied servant I needed, and, poor wizard though he is, Wormtail was able to follow the instructions I gave him, which would return me to a rudimentary, weak body of my own, a body I would be able to inhabit while awaiting the essential ingredients for true rebirth†¦a spell or two of my own invention†¦a little help from my dear Nagini,† Voldemort's red eyes fell upon the continually circling snake, â€Å"a potion concocted from unicorn blood, and the snake venom Nagini provided†¦I was soon returned to an almost human form, and strong enough to travel. â€Å"There was no hope of stealing the Sorcerer's Stone anymore, for I knew that Dumbledore would have seen to it that it was destroyed. But I was willing to embrace mortal life again, before chasing immortality. I set my sights lower†¦I would settle for my old body back again, and my old strength. â€Å"I knew that to achieve this – it is an old piece of Dark Magic, the potion that revived me tonight – I would need three powerful ingredients. Well, one of them was already at hand, was it not, Wormtail? Flesh given by a servant†¦. â€Å"My father's bone, naturally, meant that we would have to come here, where he was buried. But the blood of a foe†¦Wormtail would have had me use any wizard, would you not, Wormtail? Any wizard who had hated me†¦as so many of them still do. But I knew the one I must use, if I was to rise again, more powerful than I had been when I had fallen. I wanted Harry Potters blood. I wanted the blood of the one who had stripped me of power thirteen years ago†¦for the lingering protection his mother once gave him would then reside in my veins too†¦. â€Å"But how to get at Harry Potter? For he has been better protected than I think even he knows, protected in ways devised by Dumbledore long ago, when it fell to him to arrange the boy's future. Dumbledore invoked an ancient magic, to ensure the boy's protection as long as he is in his relations' care. Not even I can touch him there†¦.Then, of course, there was the Quidditch World Cup†¦.I thought his protection might be weaker there, away from his relations and Dumbledore, but I was not yet strong enough to attempt kidnap in the midst of a horde of Ministry wizards. And then, the boy would return to Hogwarts, where he is under the crooked nose of that Muggle-loving fool from morning until night. So how could I take him? â€Å"Why†¦by using Bertha Jorkins's information, of course. Use my one faithful Death Eater, stationed at Hogwarts, to ensure that the boy's name was entered into the Goblet of Fire. Use my Death Eater to ensure that the boy won the tournament – that he touched the Triwizard Cup first – the cup which my Death Eater had turned into a Portkey, which would bring him here, beyond the reach of Dumbledore's help and protection, and into my waiting arms. And here he is†¦the boy you all believed had been my downfall†¦.† Voldemort moved slowly forward and turned to face Harry. He raised his wand. â€Å"Crucio!† It was pain beyond anything Harry had ever experienced; his very bones were on fire; his head was surely splitting along his scar; his eyes were rolling madly in his head; he wanted it to end†¦to black out†¦to die†¦ And then it was gone. He was hanging limply in the ropes binding him to the headstone of Voldemort's father, looking up into those bright red eyes through a kind of mist. The night was ringing with the sound of the Death Eaters' laughter. â€Å"You see, I think, how foolish it was to suppose that this boy could ever have been stronger than me,† said Voldemort. â€Å"But I want there to be no mistake in anybody's mind. Harry Potter escaped me by a lucky chance. And I am now going to prove my power by killing him, here and now, in front of you all, when there is no Dumbledore to help him, and no mother to die for him. I will give him his chance. He will be allowed to fight, and you will be left in no doubt which of us is the stronger. Just a little longer, Nagini,† he whispered, and the snake glided away through the grass to where the Death Eaters stood watching. â€Å"Now untie him, Wormtail, and give him back his wand.†

Tutorial answers

If the system already exists, different scenarios can be tried using he model before tests being carried out on the real system. Alternatively if the system does not exist, the model can be used to help decide on the final design of a system. Often there are constraints on the design that need to be investigated e. G. Constraints on cost, space, etc. Modification to systems once they exist can be expensive hence it is important to try and get design of systems ‘right-first-time' and this is where modeling and simulation can be useful engineering tools.Example: see lecture notes weekly under section Why is modeling important ?. 2 See notes 3. Components of system Inputs Outputs States Environment Tank Valve Pipes Inlet Flows of A and B Liquid level Level change in tank Upstream of inlet to tank and downstream of outlet valve 4. See notes 5. See notes 6. Bookwork (as coursework 1) TUTORIAL ANSWERS 2 El . A proportional relationship for a component is here considered to be an unch anging relationship (and is often referred to in modeling terms as a constitutive or physical relationship).These are the natural physical laws which the individual components of the system obey e. G. For an electrical system, the relationship between voltage and current and in the special case of an ideal resistor – Ohm's Law FRR. I E. Kerchiefs Current Law : algebraic summation of all currents flowing into a junction of a network is zero. Kerchiefs Voltage Law: algebraic summation of all voltages acting around a loop of a circuit is zero. Examples – see section 2. 2. Of lecture notes. E. The impedance of an element is its voltage:current ratio.Multiple Choice: Electrical Systems El(b) E(C) Problems: Electrical Systems El . 3. 3 0, Ohm's Law is obeyed since the resistance is constant as the voltage varies Q. 40 A E. IV E. (a) 4. 4 0 (b) 16 (c) 4. 4 E. (a) 0. 68 V (b) 0. 47 V (c) 0. 34 V E. (a) 0. 2 V, 205 ma (b) 1. 03 V, 52 ma (c) 1. 16 V, 193 ma E. = 30/84 v = 0. 357 *12 volts = 4. Volts E. VI = 366/191 = 1. 92 V, TUTORIAL ANSWERS 3 MI . (I) spring f = xx= k(XSL -xx) where x is the displacement (or extension) and k is the proportionality constant called the spring constant with units of force/displacement e. . N/m. Damper f = BE k(FL – vi) where v is the velocity and B is the proportionality constant called a viscous friction coefficient or constant. Its dimension is force/velocity e. G. NSA/m. MM. See lecture notes. The force balance law demands that (a the acceleration). Analogies: This is analogous to Kerchiefs voltage law, particularly if one treats the inertia acceleration as an equivalent force. Note: In order to model a mechanical system, the usual practice is to form a free body diagram around each inertia (mass) component.One will then end up with a set of simultaneous differential equations, the solution of which dictates the dynamics and constitutes the system model. In the case where there are no mass components, then ensure a force balance at selected points in the system. That is the net force acting on any point must be zero, I. E. Multiple Choice: Mechanical Systems MI . G) MM. (a,b) Problems: Mechanical Systems MI. O. AN MM. 0. 05 arms Question/ Variable (NSA/m) 812 834 Biota I 2 1217 24/19= 1 . 263 4 15/8 60/47 = 1 . 276 Questions: Thermal and Fluid Systems TFH .A system is said to be in equilibrium when its behavior is steady I. E its output and inputs are unchanging. For the liquid level system with an inlet and outlet flow, this corresponds to the inlet and outlet flows being the same. Multiple Choice: Thermal and Fluid Systems TFH. (b) TFH. (c) Problems: Thermal and Fluid Systems TFH . The flow cannot be assumed to be laminar as the proportionality constant is not inner as the flow increases through the pipe I. E. I/R resistance (Pa. s/mm) 3 TUTORIAL ANSWERS 4 IQ .Methods that can be used to determine the gradient of the straight line at t=2 sec are: (I) plot a graph and determine where t=2 or (it) differentiate x(t) with respect to t and substitute t=2. Q. (a) Q. See lecture notes Q. Completing the table gives: Electrical Component Equation Mechanical Component Rotational Component Inductor Inertia Rotating inertia Resistor Damper Capacitor Spring Torsion's spring Q. (a) Using free body diagram on the mass-damper system of Fig. 5. 1, the mass and ampere can be considered to be in parallel.Force balance gives: where: Hence: (b) Similarly for the spring-damper system of Fig. 5. 2 Force balance gives: where: , (c) For the rotational pulley of Fig. 5. 3, a torque balance is required: Torque balance gives:and where:, , Q. (a) For a resistor and capacitor in series of Fig. 6. 1 Apply Kerchiefs Voltage Law gives: (b) For a resistor and inductor in series of Fig. 6. 2 where: , , (c) For a 5 resistors and a capacitor system of Fig. 6. 3, observe that this is nearly the same system as shown in Tutorial Sheet 2 Problem E but with the addition of the opacity.Hence: where: with and H ence as in Qua. : Q. Q. Material balance on tank: rate of change of mass floodwater = mass flow in – mass flow out assume constant density 0 and area: Given: , A = 7 mm, R = 0. 14 her/mm and Sin = 100 mm/her substituting gives: Tutorial Answers 5, 6 IQ Bookwork straight from notes: Ask in a tutorial if stuck and/or use MENTAL to generate solutions and check against you work. E. G. For 1st of these t=alliances(O,2,100); ext=subs(x,t); fugue(l reset Q: Throughout Q assume a model of the form Steady-state is 0. 6. Initial value is -1. Rise is given as 1. . 63% of rise is given by which implies x(t) has this value at about t=O. 25 sec and therefore T=O. 25, Steady-state is 30. Initial value is 2. Rise is given as 28. 63% of rise is given by 0. 63*28=17. 64 which implies x(t)=19. 64. X(t) has this value at about t=5 sec and therefore T=5, k=30. Steady-state is 50. Initial value is 20. Rise is given as 30. 63% of rise is given by 0. 63*30=18. 9 which implies x(t)=38. 9. X(t) has th is value at about t=50 sec and therefore T=50, k=50. Q: Maximum current is at t=O and given as V/R: Therefore R=V/I = 5/0. 004 = mashes.Time constant is given by ARC, so T=ms implies that C=. 005/1250 = 4 micro. Q: Parameters give a time constant of cosec so after 30 sec aircraft at 95% of steady-state land speed. 1 MPH is the same as mutterer pH or (1609/3600)m/s MPH is the same as mom/s Steady-state is given as f/B. Therefore min f required is BIB [ scaled by (11. 95) to be precise]. Q: Model is Bad/dot +xx=f or (B/k) DXL/dot +x =f/k Desired time constant is about 0. Sec, therefore (B/k)=O. 8 so k=NON/m Steady-state displacement is given as (1 /k)f = 0. 04, and therefore f=AN is required. Tutorial Answers 7 1 .Find the Lovelace transform of the following signals: Students should use MENTAL to check their working here, e. G. Ray the command: 2. Use partial fractions, a lookup table and inverse Lovelace to find the underlying signals with the following transforms. Students should us e MAT to check their working, e. G. 3. What is the final value for signals with the following transforms? Use the Pit but note that: (I) there is no final value if the signal is divergent which is the case for 5th (obvious from negative sign) and (it) for convergent signals, the final value must be zero if there is no integrator.Hence only 2nd and 6th have a non-zero values which must be 4 and 0. 5 respectively. 4. Which of the following transforms has the fastest settling time? What are the settling times to within 5% of steady-state? Time constants are negative inverses of poles. One can estimate time to 5% error as approximately three times slowest time constant (exact for 1st order but no strict generalization when many poles due to uncertainty about partial fractions). Time constant is the negative inverse of the pole. So pole at -0. 25 gives T=4, etc. 5. Sketch the poles and zeros of the following transforms on an Regard diagram.By marking the LAP and RAP clearly, hence determ ine which represent stable and unstable behavior. Students should use MENTAL to check their working for his, for example, doing 4th as follows will produce a fugue with poles marked in Y and zeros in ‘o': Systems are stable if and only if all the poles are in the LAP – the origin is counted as being in the LAP. The positions of the zeros do not affect stability. Tutorial Answers 8 1 . The inverse Lovelace transform of a transfer function is called the â€Å"impulse response function†. If a system has an impulse response function given by g(t) t(l-sin(t)).Compute its transfer function, G(s). 2. Use Lovelace methods to solve the following ODE equations. 3. Give examples of type O, type 1 and type 2 systems. Has does this affect the expected behavior? Bookwork 4. Which of the following transforms for 1st order ODES has the highest gain? What are the gains? What are the time constants? Determine and sketch the step responses for each of these. Gains are 4, 3, 1. 5 an d 1. 125 respectively. Time constants are 4, 0. 2, 1. 25, 0. 5 respectively. As these are 1st order, sketching step response follows same procedures as tutorial 5,6.Tutorial Answers 9, 10 1 . Bookwork – read some control text books to broaden your views on the uses and potential of control. 2. This is also straight from the notes but your understanding will also be improved by some wider reading. Don't Just stick to your main discipline, but look at examples from chemical, aerospace, automotive, medical, electrical, biological, etc. 3. Straightforward application of the Pit. 2nd set has an integrator and hence the offset is known to be zero. Otherwise, use formula. Confirm this with MENTAL, I. E. Plot is seen to settle at 0. 52 4. The 1st part is taken direct from the lecture slides so not repeated here. The closed-loop time constant and rise time are: Time constant +AKA), closed-loop game = AKA/(I+AKA), where A=4/5, -r=o. 2 Hence 0. 2/(1 +K/5)O. 8 which gives K >4+3. K or 0. K>4 or K>5. Confirm this using MENTAL, ii. Use G=TFH(4,[1 %% plot in a figure It is clear that the time closed loop pole polynomial is (s+ [1 +AKA]/T) and hence the pole is in the LAP for all positive K which implies closed-loop stability. Discussion of large K is bookwork – read some text books. 5.This question is designed to make a student think and experiment. To meet specifications, the closed-loop is given as Clearly the steady-state gain is unity as expected so the offset requirement is met. The closed-loop poles are determined from the roots of the denominator and we want the poles to be to the left of -2. 5 ‘e. (s+2. 5) is equivalent to (0. As+1). Both roots can be placed at 2. 5 if In the future students will recognize that lower values of K will give a slower pole and higher values of K will give rise to oscillation. 6. Standard question.Form closed-loop transfer function and find characteristic polynomial for all 3 cases. You will need to do the partial frac tions for all 3 and sketch, but you can use MENTAL to check your answers. E. G form the three closed-loop transfer functions and then type feedback(GO,GO,GO) to see all 3 together. N.B.: 63 is seem 2 content. Clearly Just proportional is fastest, but gives a large offset. GIG is smooth (2 real poles) ND no offset. But poles are well spaced so this is conservative. 63 has similar response time to GIG (same slowest time constant), but has complex poles and thus oscillation.Conclusion, PI is best! Typical exam type question outline answer a) Let the internal temperature be given as T degrees. The rate of heat supplied is given as: The heat loss OHIO(T+50) Hence the temperature is given by: In steady-state we desire T=20 which implies that b) If the external temperature drops by 10 degrees, then the model becomes: which implies the new steady-state temperature will be 6 degrees! The time constant is clearly 1000 sec. Students should sketch a graph showing the temperature moving from 20 to 6 with the appropriate time constant. ) If the heat input from the passengers is increased, the model becomes In the case, the change in temperature is negligible which suggests that for this scenario the key factor is the external temperature and heaters rather than any heat coming from the passengers. D) Clearly the open-loop choice of voltage does not maintain the temperature correctly in general and so some control is needed. It is known that the correct steady-state can only be achieved in the presence of uncertainty if integral action is included.The steady-state error too change in desired temperature is given by because K(O) is infinite, irrespective of changes in the gain of G or disturbances such as changes in external temperature! Students should first put the equations for the model and integral control law into Lovelace transforms about the steady-state: Hence The closed-loop transfer function is given as Students should validate that the time constants are reasonabl e and that the closed- loop is stable! The time constants are given from the roots of the closed-loop denominator. Students should note that these are similar to the original time constant and thus satisfactory.

Apple Organization Structure Essay

Each team will present a case during the course. The presentation will take between 15- 20 minutes. It should provide 1. summary of the case including information on who the main actors are, what the internal and external environment for this company is and what the key challenges are. You should also try to go beyond the case and make links to the themes in the book on corporate entrepreneurship. Again, presentations should also involve the audience with discussion points and other interactive elements. In addition to the presentation, teams hand in a written report on the case. Teams are graded on the basis of the presentation, the written document and their ability to answer questions and to raise discussion in class. Apple Organizational Structures Apple’s New Organizational Structure Could Help It Move Faster This cartoon has been floating around the Internet for a few years. It’s supposed to be a humorous take on how all the biggest tech companies are organized. It might have to be updated to account for changes at Apple. When Steve Jobs was in charge, everything flowed through him. Now that he’s dead, the company is taking on a more collaborative approach, according to various reports. The latest, from Adam Satarino at Bloomberg, says Jony Ive is encouraging Apple’s software and hardware teams to collaborate, something that never happened under Jobs. Ive was given control over Apple’s software look and feel in November. Previously, he was only in charge of the look of the hardware. This new collaborative approach is causing Apple to be more deliberate than in the past, says Satarino. This could lead to delays, he says. Because this is Ive’s first crack at Apple’s software, ità ¢â‚¬â„¢s understandable that there are going to be delays. He’s spent six months on a project that normally takes a year. In the long run it will be interesting to see how this collaborative approach works. As the org chart above demonstrates, Apple was always a company with one guy making all the calls. This made product decisions easier. But it also made them slower at times. We heard from a source that Apple often faced bottlenecks because everything had to flow through Jobs. And Jobs was the kind of person who would get intensely focused on one thing, leading to him ignoring other products at the company. Former Apple employee David Sobotta told us, â€Å"If we saw Steve Jobs come into a briefing, he couldn’t talk about anything else, other than the thing he was working on †¦ He came into an enterprise sales briefing, and at the time he was working on iMovie. So, we’d be talking about home movies in the enterprise briefing.† In theory, the new organizational structure should help certain divisions make decisions more quickly. But, collaboration has its downside. If everyone is trying to reach consensus on a decision it could lead to big delays. http://www.businessinsider.com/apples-new-organizational-structure-could-help-it-move-faster-2013-5#ixzz2eiKk1VKI

Analysis of Problems Facing PETRONAS Corporation Research Paper

Analysis of Problems Facing PETRONAS Corporation - Research Paper Example This essay aims at identifying and analyzing the challenges faced by organizations in the public sector. The specific challenge that will be discussed is the poor management of the Malaysian state-owned multinational corporation, PETRONAS. The current state of the organizations are also analyzed by the researcher in the essay after reviewing various resources on the organization selected. Recommendations are also provided by the researcher on the topic of how the organization can improve its performance and be effective in modern world. The public sector organization selected and analyzed in the essay is the Petroliam Nasional Berhad (PETRONAS) Corporation. In conclusion, the researcher sums up the study and states that government-owned organizations receive high consideration and support from the government to effectively operate and achieve their goals. Similarly, PETRONAS Corporation is a Malaysian government-owned corporation that receives support from the government and enables the corporation effectively to exploit oil and gas fields in Malaysia and in other countries. Although PETRONAS is a government-owned company, it is a profit-based entity owned by the Malaysian government rather than a public utility organization. Currently, the corporation is among the top five best companies producing Liquefied Natural Gas in the world. It is stated by the researcher of the essay that the success attained by the corporation is dependent on the support of the Malaysian government.

Operations management Essay Example | Topics and Well Written Essays - 250 words - 3

Operations management - Essay Example It will be situated next to the road, railway and airport terminals. The design of the warehouse will also consider variability factor. This implies that it will be segmented into different sections such as shipping, reception, and stock and returned stock areas so as to store all the products (Kumar 174). The segmentation of the warehouse into different sectors will play as significant role in storing all types of tea brands, qualities supplied by the company. In conclusion, these Vs will help it to create a risk-free environment and safety storage for products, it will enable the staff to keep inventory of all the stock (Cannella and Ciancimino 175). Through this, the company will win the confidence of the clients and emerge as the best alternative regardless of the stiff competition from established companies like Nescafe, Lipton and Twinings, that enjoy a dominant share of this lucrative tea business. Cannella, S. and Ciancimino E. ‘Up-to-date Supply Chain Management: the Coordinated.’ In Dangelmaier, W. et al. Advanced Manufacturing and Sustainable Logistics. Springer-Verlag Berlin Heidelberg, Germany. 2009.