A Rose for Emily Summary

Faulkner beautifully illustrates the morbid parallelism between Emily’s father and the house that imprisoned her. Both were controlled and manipulated by the very being that would eventually destroy them. Faulkner strategically places the home of the Grierson’s, on what was once consider a prestigious street in the crumbling, overcrowded town of Jefferson. Here, both monuments of the past are forced to maintain a dignified facade of sanity among an ever-changing society. There are two interpretations to be made in understanding the motive and meaning behind Emily murdering Homer Barron, in â€Å"A Rose for Emily†. The first motive deals with the personal revenge Emily seeks towards her father, the second being towards the town of Jefferson who scrutinized her and critically analyzed everything she did. The death of Emily’s father set in motion a diabolically evil scheme to seek the ultimate revenge on the patriarchal society of Jefferson, which controlled and ultimately claimed her sanity. Her revenge began with her father whom she hated for denying her the privilege of having a normal and successful woman’s life. Emily’s hatred began to fester within the depths of her soul as a young child, dominated by a father who concluded that no male figure was good enough to inherit the status of courting or marrying a Grierson. Emily became emotionally tormented by the very thought of being a spinster and having no other male figure to love, besides her controlling father. The growing resentment continued as she became older and perspective suitor’s appeared at the front door, ultimately to be chased away with a horsewhip. Although the violence is apparently outward-the upraised horsewhip against the would be suitor- the real object of it is the woman-daughter, forced into the background and dominated by the phallic figure of the spraddled father whose back is turned on her and who prevents her from getting out at the same time that he prevents them, suitors, from getting in. † (560). Emily was a caged animal, imprisoned by her controlling father, in a circus whose master manipulate s all of the animals’ movements, emotions, and physical appearance by a carefully illustrated system of rewards and punishments. Emily’s’ rewards, according to her father, was that she be portrayed to the towns people as â€Å"a slender figure in white† too pure for the stains of any human being to corrupt what he, the father, masterfully created. Emily’s punishment was that she would eventually be revered as an untouchable figure who’s every action or movement would be analyzed by the town of Jefferson. It wasn’t until that fateful day, the death of her father, when Emily was finally able to outwardly express her revenge upon the very first male who suppressed her emotionally and physically, by not giving him the proper burial a Grierson deserved. Instead, she was able to experience, first hand, the feeling of triumph over watching her so-called beloved father rot before her very eyes, the sweet revenge of a twisted character. Emily cleverly denied to the town’s people that her father died in order to secretly express her future intention of revenge towards the town of Jefferson by not letting them, the residents, immediately dispose of his decrypted and decaying body. â€Å"She told them that her father was not dead. She did that for three days, with the minister calling on her, and the doctors, trying to persuade her to let them dispose of the body. Just as they were about to resort to law and force, she broke down, and they buried her father quickly. †(27). â€Å"Because she is Miss Emily Grierson, the town invests her with that communal significance which makes her the object of their obsession and subject of their incessant scrutiny†¦ the town is able to impose a particular code of behavior and to see her in failure to live up to that code an excuse for interfering in her life. (560). The result of the towns interfering adds fuel to her fire to seek the revenge for interfering in her life and being so critical of every movement that she makes. The most significant diabolically evil plan Emily sought was the revenge on the patriarchy society of Jefferson, which no one would be able to comprehend the magnitude of the murder of Homer Barron. After the death of her father, the townsme n felt pity for her and claimed that leaving her the decrypted; decaying housing structure was a way of knocking her off the pedestal and becoming more humanized. The patriarchal society outwardly expressed their need to watch over and care for the lonely spinster who they concluded incapable of providing for her financially. Colonel Satoris, the eldest patriarch of Jefferson, fabricated a story to justify why the town remitted her taxes, claiming that it was from a financial loan her father provided for the town many years ago. The motive for the murder of Homer Barron was for Emily, on her deathbed, to gain the last laugh at a town that scrutinized and critiqued her yet never came to understand why she acted and lived as she did. Another motive for the murder of Homer Barron was to prove to the patriarchal society of Jefferson that even though she, Emily, could not â€Å"persuade him to marry her† (535). Due to his perversions, she may still succeed in controlling Homer if her were dead. No one would be able to take that secret love she had for Homer away even though he would never reciprocate it the same way because of his alternative lifestyle. Homo Homer was an embarrassment to Emily, because for the first time ever she was free love someone, and he turned out to love young men more than women. This humanizes Emily even more and in turn it helps explode the decades of manipulation and control she receives at the hands of her father. She had a perfect plan; no one in the town of Jefferson would ever believe that Emily, being a real lady â€Å"to forget noblesse oblige—without calling it noblesse oblige† (535). â€Å"Emily is exempted from general indictment because she is a real lady-that is, eccentric, slightly crazy, obsolete, a â€Å"stubborn and coquettish decay†, absurd but indulged; â€Å"dear, inescapable, impervious, tranquil, and perverse†; indeed, anything and everything but human. (561). Who would believe she would have murdered someone in order to have their love. â€Å"A Rose for Emily† is taken from a morbidly crepitated point of view where an author obviously is hiding many deep dark secrets within his past without bluntly coming out and exposing it to the rest of society. Faulkner disguises his own tragedies from his past t hrough the story to give himself a sense of personal release from his own personal bondage. â€Å"A Rose for Emily† is utilized as a clever way for William Faulkner to disguise his own slide from sanity.

Berkeley in the Sixties

The movie Berkeley in the 60's archives how an extremely minute set of undergraduates who sought to discover politics going into the Open Speech and Anti-War activities. Opening early on in the decade as the Management of the Institution of higher education of California at Berkeley makes a decision to forbid tables where associations approved out flyers, the Liberated Speech Movement was a minute grouping of citizens concerned in protecting the first amendment of the Constitution.The Academy Management took this as an insult to their power, and as the Management tried to warm up their muscles, their events just appeared to support the fire of the association. The point is that if the Management hadn't completed this core of a very little angry group is enough to stand up for their rights, the huge level communal transformation that happened in the United States and one could dispute in western society, most likely wouldn't have occurred for fairly an extended time perhaps not at all .These dispute showed what a grass roots group could do. It assisted the civil rights association and initiated the Women’s and Anti-War movements. This happened all because the Head of the University of California couldn't accept a little thing. People who were actually instrumental in the movements performed most of the film narration. They emerge to be extremely open about what was sensible and what was not. Not everybody who took part was of a solitary mind. Several were more fundamental than others.Some saw the progress demeaning into a useless mob and left to get concerned in the major remains of American politics. If each and every movie has characters the faction itself was one. It started out very alert. The public concerned was by and large upper middle class white kids. They were very naive. When they complained, they advanced the protest from a position of principles. Any limit on speech was objection. Afterward, as more people came together, the impracticality st arted to demean.Not everyone in the crowd was basically there to protect the original amendment. Some decided they had the authority to re-organize the world to their fondness. Problem like People's Park had nothing to do with open speech, but where more of loosen of the demonstrator's own opinionated influence. As this happens we see the quality of the movie transform. It's simple to get after someone who was thrown in a police car for conversing; it's harder when you notice them whirling over cars and basically stealing land.This deterioration from the interior principles into a mob appears to shade many of the current protests. People like to maintain the tag â€Å"Grass Roots† without essentially making it. What is absent from the movie is the other point of view, the view of the management. Anybody in a place of power counting Governor Ronald Regan is highlighted as an adversary of democratic system. The filmmakers bringing the picture as one 25 years after the faction, emerges to not have completed the effort to discuss the conflict.If they had, they did, they made no cite of it. Still, as a documentary of a point of analysis of a period, Berkeley in the 60's accomplishes something. Even If you were not there, you would at least recognize the students' point of view. This perhaps is biased in the students' support, but it is educational, and does keep your concentration the whole time. This is a huge way to educate history. Bibliography ? Yahoo Movies, Berkeley in the Sixties. Retrieved on Friday February 16, 2007 from http://movies. yahoo. com/shop? d=hv&cf=info&id=1800178336

Philosophical problems for people with religious beliefs Essay

* In what ways might evil and suffering create philosophical problems for people with religious beliefs? Outline two solutions to these problems( 21 ) * To what extent are these solutions successful?( 9 ) 1. Suffering can cause all sorts of problems that can shake people’s religious beliefs. Evil and suffering create problems in people’s faith because they have lost someone or they have suffered particular hardship in their life and they wish to blame someone or something for their personal suffering and this is normally God. If someone close to a person dies and that person is religious or has been brought up in a faith even if they have lapsed it will make them doubt their faith even though we know that everyone has to die someday but it is never the right time to loose someone you love. And because of this people blame God or if they have a faith it may make them feel that god is not there. This is the issue of the inconsistent triad. The triad says that god is all loving all powerful and all knowing. If this is true would an all loving God let innocent people suffer at the hands of illness and natural disasters. And if he is all loving and he wouldn’t want us to suffer like this he might not know it was happening and so the second angle of the triangle is disproved and finally if he is both all loving and all-knowing he would not want people to get hurt and he knew it was happening so maybe it is the fact that he simply wants to help but he cannot as he is not all powerful. The inconsistent triad is a very big philosophical problem as it is a very logical series of suggestions and seems perfectly logical that if you love someone you wouldn’t want them to be hurt if you knew it was happening and more importantly you had the power to stop it why wouldn’t you especially if you loved that person. This is then used to say that if God is not all of these things then he is not God. This sums up nicely the flaw in all religion. If you say your God loves you and they are all powerful then why do they allow people, innocent people to suffer. Also the second problem with the morality of evil and suffering that can hurt religious beliefs is the issue of unanswered prayers. If someone is praying that their friend or relative won’t die of an illness or something along those lines if they do people often turn away from god because they feel he is not listening because what they asked for had not been granted. And again this relates back to the inconsistent triad as if he can hear the prayers and if he loves the people who ask him and plead him for help and he ignores them and lets people die maybe he isn’t all powerful or isn’t all loving. Some theists respond that a perfect being may still allow some evil, asserting that it will enable certain greater goods, such as free will, which can not be achieved without allowing some evils. A theodicy, on the other hand, is an attempt to provide such justifications for the existence of evil. Richard Swinburne maintains that it does not make sense to assume there are such greater goods, unless we know what they are, i.e., we have a successful theodicy. Many contemporary philosophers disagree. Skeptical theism, which is based on the theological position that humans can never expect to understand the divine, is perhaps the most popular response to the problem of evil among contemporary philosophers of religion. But how do we truly explain the problem of evil and suffering especially in relation to the existence and power of god. Swinburne also once said â€Å"in a cool moment we must provide a satisfactory answer for atheists.† I believe that this concept could also be applied to the theists who are suffering or are questioning god as a result of evil and suffering. To deal with the issue of theist faith suffering as the result of suffering we must address the objections to the problem. These are many and varied; for example Christian scientists often say that God cannot exist due to the logical problem of the inconsistent triad whereby the two claims negatives the third and therefore the existence of a perfect god. The existence of evil is of course the strongest objection and causes the most problems for faith. But there are many types of evil there is natural evil, god created a flawed and imperfect world. There is also moral evil why did god create people capable of doing such terrible things but this comes down to the issue of free will in mankind. But overall evil is the min reason for philosophical problems in beliefs. This is often countered by some theists saying that maybe god is making us suffer out of love. In irenaean theodicy it is considered and based upon the fact that our god is a personal god unlike in the Augustinian theodicy where god seems more disinterested and distant. It is implied that god loved his creation. † god looked upon what he had done and he saw it was very good†( the book of genesis).and because he loved us so much he wanted us to have the chance to create our perfect soul through an imperfect world with challenges to receive the ultimate reward of a perfect soul. So we suffer for a positive purpose or outcome. Professor John Hick developed the soul making theodicy. John Hick believes that in order for moral growth to take place it is important that human beings are created at a knowledge distance from God. This knowledge means that human beings do not know whether God exists and so this knowledge gap means that human beings are genuinely free and have space to grow and mature through making their own moral choices. Irenaeus, a Church Father. Believed that human beings have a two stage process of moral development, having been created in â€Å"the image and likeness of God.† (Genesis 1:26). Created in the image of God, human beings have potential, which they may achieve in this world as they attempt to grow into the likeness of God, thus fulfilling their potential. This two stage process of moral development is compared to growing from a child into an adult through our moral choices. St irenaues also suggested that evil could be tracked back to human free will.he differed from Augustine by saying that god did not make a perfect world and that evil has a valuable part to play in god’s plans for humanity. Irenaeus said that god was partially responsible for evil. In the sense that god created humans imperfectly in order that they could develop into perfection. His own image but with the intention of letting them develop into his likeness or perfection of character later. Being in gods image means that you have intelligence, morality, personality, but perfection would only be accomplished as humanity was changed into god’s likeness developing over time. God couldn’t have created humans in perfection because attaining the likeness of god needed the willing cooperation of human individuals. Moreover freedom requires the possibility of choosing well instead of evil and therefore god had to permit evil and suffering to occur. St Augustine lived in the fifth century and it was his concept that god was perfect the world was perfect and it was mans evil that caused this to break. God brought the world into existence from nothing (ex nihilo) the fall itself is chapter three of genesis. Augustine taught that following the fall the devil tempted Adam and eve to eat the fruit from the tree of knowledge the fruit from the knowledge tree. The fruit which god had forbidden Adam and eve to eat. Sin is the definition of the will of a rational being away from god which is motivated by pride hubris. Augustine believed that original sin was passed down through the act of sexual intercourse so that every human being, as descendants of Adam and eve suffer from original sin. Humanity has a tendency towards sin. Man wants to sin. â€Å"The good that I would I cannot.† Evil is a privation of goodness. Evil doesn’t exist as a substance of his own right. Augustine described sin as a falling short or missing the mark of that which god intends. Augustine believed that the â€Å"ugliness of sin is never without the beauty of punishment In the scientific age of the twenty-first century people no longer believe in angels. The whole idea of the fall is nonsensical and is only fit for a pre-scientific view of the world. Similarly people no longer believe in the devil. Augustine’s theodicy depends on his assumption that the world was made perfect. This is contradicted by Charles Darwin’s theory of evolution and natural selection. The story of Adam and Eve is not historically true, it is a myth. The teaching of Original Sin is not Biblical, but comes from St Augustine. The idea that the human race is fallen, as we inherit Original Sin from Adam and Eve is both Scientifically nonsensical and Even if it were true it is highly unfair to punish the offspring (the human race) for a sin committed by their parents, i.e. Adam and Eve. 2. As we see pain and suffering around us in the so called â€Å"perfect world that God created and we feel a need to justify why this is happening and more importantly who fault it is. This is where god comes into the equation, the designer of the earth and an all knowing being who loves us all no mater who we are. The mere idea of pain in this world with this being calls into question the very existence of what our existence is and how it came to be. The definition of a theology is to prove the divine attributes of god and when one sees death in ones family; could one ever possibly see a vindication of evils existence? In analysis both theodicy’s one must take into consideration the historical context in which both were conceived and written. With modern scientific knowledge we have com to believe that the universe came into existence through the big bang. Consequently many have discredited the possibility of the genesis version of creation. The Augustine theodicy is therefore open to much modern day speculation and criticism, as it is based on the belief that man established evil due to a conscious decision made by Adam and eve under temptation from Lucifer. This is the fall and when human existence supposedly turned away from the grace of God. In today’s more logical and pragmatic society the idea of man’s creation through such events is considered to be nothing more than mythological farce. Where the text should not simply be discredited but is more of a symbol in this case to Christianity. In discrediting the source of the theodicy therefore one considers what remains of Augustine theodicy ineffective due to our lack of belief in the first premise. The point to consider is if one is a traditional catholic and believes that this is the word of God or weather one takes a more modern stance on the issue and learns from scientific growth of the modern era. However scientist still struggle to provide a true explanation for the cause of the big bang, had Augustine been able to see these modern times he may have argued the point that when the fall happened (the expulsion of Adam and eve from the garden.) the big bang would have occurred. This is very open to interpretation as it is now a certainty that the story of Adam and eve is a metaphorical device to explain the beginning of the world to people who were simpler than today’s standards. What is clear is that the Augustine theodicy is a very traditionalist approach to the idea of evil. Whereas the irenaean theodicy was written before the Augustine theodicy it is actually a more modern in its approach to the problem of evil and suffering. In these modern times under newer scientific evidence such as the theory of evolution and the big bang theory St Iranian’s theodicy was cast into new philosophical light. It was shown to be a document before its time as it draws from an original state of imperfection in the universe. Which then has to work towards perfection? Her is so much evil in today’s society we can see many natural evil. In contrast to natural evil one cannot but help agree that the world is not perfect. In contrast to natural evil occurring due to a delicate balance being lost in the world the idea of an imperfect world working towards perfection appears far more feasible. To conclude one must draw to the evident change in sociological and intellectual factors from the time of Irenaeus and Augustine. Although both when written may have proved strong vindification for moral and natural evil in the case of the existence of god mans growth appears to change the significance of each thing in the universe.

Modernization Theory and Classical Dependency Theory Essay

Modernization theory is the process of transforming from a traditional or underdeveloped society to a modern Western societies way of life. Basically, Modernization theory became the foundation stone of this evolutionary prescription for development. The theory is not homogeneous—numerous proponents disagreed on several key features. But in broad outline, the theory focused on deficiencies in the poorer countries and speculated about ways to overcome these deficiencies. It viewed traditional society as a series of negatives: stagnant and unchanging, not innovative, not profit-making, not progressing, not growing. Modernization is the economic growth within societies and the third world did not undergo these economic or political transformations; it was ‘left behind’. So the task of the Third World is to transform itself from tradition to modernity. That is, to follow the footsteps of the Western world. In fact, because the path is now charted, these countries can avoid the mistakes made by the West. On the other hand, Dependency is also not a homogeneous, unified theory—serious analytical differences persist within the school. Economic growth in advanced countries created Third World poverty in its wake: not simply that the Third World is poor in comparison with the industrialised world; rather that it is poor because development of the industrial system in Western Europe and North America changed and impoverished many societies of Asia, Africa and Latin America, through colonialism, imperialism and extractive terms of trade. When capitalism began to spread, the ceaseless search for profit began: through the production of agricultural goods in colonies or other lands, and Western Europe’s ability to drive unequal bargains. This fundamentally changed the social structures of the Third World. The term dependency comes from this link: Some say the exploitation of various regions for their raw materials and labour impoverished them and made them depend on the West. Others point out that in fact it is the other way around: that the West has been dependent on the Third World though history in order to be able to grow and prosper. Modernization theory sees capitalism as a creative force, causing growth and progress. Dependency sees international capitalism as the ruin of the Third World. Modernization sees rich countries as helpers of poor countries; dependency sees them as the main obstacle to the well-being of the poorer countries. Not all of dependency theorists’ prescriptions are anti-capitalism however: some see  some good in using capitalism and protectionism to enhance national economies. Both theories have point in terms on how develop these third world countries and address poverty. According to modernization perspective the causes of poverty are due to structural restraints placed on the third world by European powers. It describes the structural restraints as unequal exchange. The declining â€Å"terms of trade† as the price of exports from the third world are decreasing, while prices from developed countries are increasing. This effect creates a circular trap as wages in third world countries are low, which declines the export prices, while wages in richer countries a re increasing, which cause increases in the price of industrial goods. This means underdeveloped countries need to constantly increase their yields and exports for their profits to stay the same. On the other hand, dependency perspective argues that the causes of poverty in third world countries are due to their traditional cultures and values. These theories believe that in order to solve this problem poor countries can succeed through following the footsteps of developed countries. These would include invading other countries to. However, this is quite unachievable because we are now in modern time. In the case of the Philippines, I believe that we can achieve and become one of the develop countries. For example, iphone has a metal cover and iron to its internal body; the metal was produced through mining and exported to some countries. When it goes back it becomes iphone and it cost more expensive. In other words, the countries that produced metal and have limited technology are making those developed countries richer. Instead of exporting those products, utilized it within the country and profit more from it. Lack of technology is not the reason to depend in the western countries, impatient and being contented for what they have. They don’t think of the better things that they can have. The real essence of democr acy was turned off and forgot that it is the rule of the mob. If these theories are really applicable how come third world countries are still crapping and suffering from poverty. But it is very applicable it’s just happen that the attitude and the thinking of the people are different. Like what I have learned from Cuban people, people must change their way of thinking.

Importance of Being Earnest and the U.S. Government Essay

Importance of Being Earnest and the U.S. Government - Essay Example He was born in 1854 and died in 1900. He had particular aspirations when it came to the writing of short stories and he is known to have written one novel. Wilde was later in his life arrested and imprisoned for being involved in homosexuality and indecency. After his release, he moved away from Ireland and he never returned. "Importance of Being Earnest" is a playwright written by Wilde in the year 1895. The concept of the play is vested in England. The play consists of humor and lies and is based on two men who escape their obligations. The first scene of the play is centered in the house of Algernon Moncrieff who is depicted as an upper-class refined young man with a male servant known as Lane. It is tea time in London and Algernon has just entered the room where Lane is preparing the table for tea. (Wilde, Pg 8) Algernon plays the piano and then starts a conversation with Lane asking him whether or not he liked how he played the piano. Lane says that he is sorry because he had not been very attentive. This first part of the play if compared with the government in the United States depicts the aristocratic kind of life that is led by the government. The government is sophisticated and their lies are surrounded by servants who undertake all kinds of duties left right and center. As the play coAs the play continues, Algernon requests his male servant to make mushroom sandwiches specifically for his aunt who is coming in with his cousin Gwendolyn. The scene takes a twist when Algernon asks Lane what he thinks about marriage and Lane says that he has no much experience on the field since he is a divorcee. The servant's casual answer surprises the boss. Their conversation is disrupted by the door bell which the servant responds to. Algernon is left in the room eating the Mushroom sandwiches. (Wilde, Pg 13) Lane comes back to the room announcing the presence of Ernest Worthing. Ernest is Algernon's friend. Ernest is from the country side but he often comes to visit London. Ernest in their conversation reveals to Algernon about his intention to propose to Gwendolyn, Algernon's cousin. Algernon is not happy about this and he tells Ernest that he would not allow him to propose to his cousin until he explains the incision that he had collected written from a certain Cecily. At first, Ernest says that he does not know of any Cecily. At this point in the play, a light is shed on the United States government. The government is always in a position to lay down its virtues earnestly but is always in denial. This is clear from the situation in Iraq where innocent individuals have been killed but the government of the United States continues to deny this. This leaves Ernest to explain to his friend that he leads a double life. In the country side, he is known as Jack. In addition, he feeds lies to the people in the country that he has a brother in the city known as Ernest Worthing. He uses this excuse as an attempt to escape his responsibility in the country. Therefore, Cecily is his ward in the country and the granddaughter of the man who had adopted him. (Wilde, Pg 15) In the process of the conversation, Algernon also reveals that he lives a double life since he also lies that he has another invalid friend in the country known as Bunbury who he goes to see

The Structure of Biological Membrane Essay Example | Topics and Well Written Essays - 2000 words

The Structure of Biological Membrane - Essay Example However, membranes are not only passive barriers. They include a set of proteins specialized for promoting or catalyzing various cellular processes (Nelson & Cox 2004, p.369). Molecular transportation is the most important function of membranes facilitated by carrier and channel proteins (McKee 2004, p.62). General questions of transportation and channeling across biologic membranes are well considered in the encompassing textbooks of Lodish (2003, p.245-300), Nelson & Cox (2004, p.369-420), Kuchel & Ralston (1997, p.171-184), McKee (2004, p.353-366), Garrett & Grisham (1999, p.259-326), etc., in special monographs, e.g. Keizer (2000) and also in a variety of articles. All cells acquire from its environs the raw materials for biosynthesis and for energy production, and also release to its environment the byproducts of metabolism. Only some nonpolar compounds can cross the membrane unassisted. However, for polar or charged compounds or ions, a membrane protein is essential for transmembrane movement. Membrane transport mechanisms are vital to living organisms. Ions and molecules constantly move across cell plasma membranes and across the membranes of organelles. This flux must be regulated to meet each cell's metabolic needs. For example, a cell's plasma membrane regulates the entrance of nutrient molecules and the exit of waste products. Additionally, it regulates intracellular ion concentrations. Because lipid bilayers of membranes are generally impenetrable to ions and polar substances, specific transport components must be inserted into cellular membranes (McKee 2004, p.372). In the simplest cases a membrane protein facilitates the diffusion of a solute down its concentration gradient. However, transportation often occurs against a gradient of concentration, electrical charge, or both. In such cases, solutes must be "pumped" that requires energy. The necessary energy may come from ATP hydrolysis (i.e. directly), or may be supplied indirectly, e.g. in the form of movement of another solute down its electrochemical gradient with enough energy to carry another solute up its gradient (Nelson & Cox 2004, p.389; Garrett & Grisham 1999, p.296). Ions may also move across membranes via ion channels formed by proteins, or they may be carried across by ionophores, small molecules that mask the charge of the ions and allow them to diffuse through the lipid bilayer of membrane. With very few exceptions, the traffic of small molecules across the plasma membrane is mediated by proteins such as transmembrane channels, carriers, or pumps (Nelson & Cox 2004, p.391). So, ions cannot pass freely through the cell's phospholipid membrane. Instead, most ions flow through special channels built from multiple protein subunits. These subunits together form a pore across the membrane. Some channels are gated, fitted with proteins that act "as hinged doors, blocking the opening until

Recent Advances in Mechanical Micromachining Essay

Recent Advances in Mechanical Micromachining - Essay Example There are much considerations to be taken when machining small pieces due to the imperfections per unit volume that are due to the size effect of the work piece and the strain effect that is caused by the size effect during machining of the small pieces of work pieces (Dornfeld & Takeuchi, 2006). An example is energy dissipation that has been neglected or along time in micro machining that resulted to significant subsurface plastic flow to the shear zone under the machined surface. 2. One of the micro geometries created through micromachining is the fabrication of multi level mold inserts for micro molding of a microwave system. This involved combination of micromachining with deep etches X-ray lithography that resulted to creation of micro molds with features in the range of 60Â µm in height and 50Â µm wide. This portrayed the possibility of stacking several mold so high aspect ratio parts (Dornfeld & Takeuchi, 2006). 3. Micro tooling refers to using the correct tools in micromachining. The cutting edge of radius of a crystal sharpened diamond for example is on the order of 10nm and the depth of such a tool is in the submicron range. Micro tools are fabricated by ion beam process. An example is the gallium focused ion beam that generates a number of cutting edges and tool end clearance and machined surface with the same as eh diameter of the tool. The use of wire electric discharge grinding (WEDG) (Dornfeld & Takeuchi, 2006) is also common in tool fabrication. WEDG involves a sacrificial wire that replaces the turning tool in conventional turning. Material is then eroded from the rotating tool with electrical discharges. The sacrificial wire in this case is fed around a reel and takes up system that would prevent discharges from worn out regions and this increases the accuracy of the tool shape (Dornfeld & Takeuchi, 2006). Micro tools are usually made from tungsten wire due to