American History Since 1900 Essay Example | Topics and Well Written Essays - 1250 words

American History Since 1900 - Essay Example This paper discusses the work of Harriet Jacobs, Incidents of a Slave Girl, as contrasted with the American Pageant (Kennedy et al, 2001). Harriet Jacobs was a slave in America during the slavery period. She wrote her narrative depicting the difficulty the slaves had. She focused her narrative on the impact of slavery on the black community domestic set-up. Her main focus was sexual exploitation in the plantation since she was sexually exploited, and focused on how slavery tore up the family set-up. There was a lot of brutality in how the whites handled the blacks who were their slaves. There was arbitrary rule which was engulfed with violence that ensured the slaves were denied any form of opportunity for personal development. In the book American Pageant, she focuses on the economic impact of slave trade and states either directly or by implication that the slavery system was ‘democratic’ and ‘fair’ as compared to other slaves systems around the world. He delicately applies euphemisms to mask the plight and nature of the black community in the society. The two sources have only one similarity: they both feature the history of American Slavery. However, the authors of the books also have clear cut racial disparities that informed their perspectives of expression. The narrative is written by a black woman who seeks to give a voice to the plight of the women slaves in her society, expressing the agony of uncertainty of the future. However, it has been contended that the incidents narratives were written under a pseudonym and, thus, could have been fiction. There has been evidence in forms of letters from respectable people of Jacobs’ times that validates the authenticity of the book. It then acts like as a platform of self expression and self realization and even as a means of resisting the slavery rule and white supremacy, just like other black narratives. It also serves a personal account of what transpired and the effects the slavery had on the writer. Narratives were written to invoke sympathy to the white community so that they would free their slaves (Kennedy et al, 2001). The book, on the other hand, covers a wider scope from the political arrangements of the time. Further, legislation that legalized slave trade and the positive effects the slaves had in the economy is also covered. Written by white authors who lacked firsthand experience of what really happened, the book fails to show an appreciation of what it means to be a slave and the effects it had on the individuals concerned. It has no platform of self expression, liberalization or supremacy but acts to narrow the thinking perspectives of young Americans, which are a form of undermining their freedom of true and accurate information. The book enhances white supremacy since it euphemizes the plight of the slaves and magnitude of their suffering. The book was written in pursuit of advancing academic in the United States and also for fiduciary b enefits arising from its sale. In her narrative, Harriet Jacobs shows the productive nature of the black people on the plantations of the white men. The labor they provided was unpaid meaning that the profits obtained from the trading of the agricultural products were quite significant. Further, the slaves lived in a squalid environment because their source of income showed that they could not afford a decent abode. Basic human rights that the world witnesses today were not in

Non-Verbal Communication Across Cultures Essay Example | Topics and Well Written Essays - 1250 words

Non-Verbal Communication Across Cultures - Essay Example In this paper, the proponent tries to define the concept and relevance of non-verbal communication in business settings. In particular the differences are compared and contrasted as observed using specific cultures of Japan, and the UK. Furthermore, the proponent also discussed the business etiquette and the possible consequences of not being familiar with the correct etiquette. Other variables such as power, status, or gender are also included especially on their impacts on non-verbal communication. Silence The absence of words or specific level of reaction does not mean there is something totally void or emptiness about it. Not with the Japanese culture because silence or chinmoku says more than a word. In Japan silence does not mean to be a specific level of insult or something else because it is a communicative skill (Davies & Ikeno, 2002). In this country, silence is derived from the Japanese values and it is the main reason how it is significantly viewed important today in ever y walk of life and in different circumstances. It is considered as a virtue. Compared in the western culture, silence in the midst of communication in Japan on a daily basis stands in a longer duration and this is due to two most important factors: historical and dominance of group consciousness (Davies & Ikeno, 2002). ... UK on the other hand has strong individualistic culture which emphasizes strong level that is contained within individual competition (Brown & MacBean, 2005). Thus, it would appear that people in the UK are more dynamic in their response especially in the context of achieving competitive advantage. Eye contact In the UK, eye contact signifies respect, honesty and listening (Moore & Woodrow, 2009). This means how important it is to have eye contact when one is in the midst of a conversation in the UK. However, a bit of contrast happens in Japan. Eye contact may mean an insult because Japanese show politeness by not having direct eye contact for it is associated with aggression, insensitiveness, negative boldness, and other related emotional manifestation (Plotnik & Kouyoumdjian, 2010). Gestures There are deep vocabularies associated with gestures (Samovar, Porter, & McDaniel, 2009). In Japan, pointing to objects and at people require the entire hand which at some certain reasons would mean an insult to use a finger in doing so. In the UK, this would bring out different meaning knowing the fact that hand gestures for instance are associated with culture and thus they would convey contradictory meaning across different culture (Thakur & Srivastava, 1997). In other words, specific bodily movements have varying meaning across different cultures, which at some point if not properly used will result to different level of conflicts. Business etiquette The above non-verbal communications are applicable within the business etiquette in the cultural context of Japan and UK. As stated earlier, silence is associated with Japan’s highly collectivist culture while being proactive is in line with UK’s individualist culture. Thus, in the UK an

Discuss the major problem involoved in the develpoment of anticancer Essay

Discuss the major problem involoved in the develpoment of anticancer agents today include in ur answer some discussion what step might be taken to get around so - Essay Example Surgical treatment involves surgical excision of a tumor or an entire organ but the propensity of cancer cells to microscopically metastases makes it effective only in localized small cancers such as breast and prostate tumors. Radiation therapy can come in the form of radiotherapy, X-ray therapy and irradiation and uses ionizing radiation to kill cancer cells. Chemotherapy involves the treatment of cancer with cytotoxic drugs that can have many effects specifically geared towards the elimination of cancer cells. One of the effects of the drugs is to interfere with cell division by hindering the duplication of DNA and the separation of chromosomes. The anticancer drugs travel through the bloodstream making it useful for cancers that have spread. Monoclonal antibody therapy involves the administration of antibodies that bind to a protein on the surface of the cancer cells. Cancer treatment depends on factors such as location, degree of severity, grade of tumor and the general state of the patient. In essence, the goal of cancer treatment is to remove or destroy the malignant cells without excessive damage to the body. This is easier said than done. Indeed, the treatments mentioned are far from being the panacea for cancer as they are severely limited not only by financial challenges but also of scientific obstacles that makes it very hard for scientists to make a breakthrough in the field of cancer research. The aim of this paper is to determine the challenges facing the development of a cure of cancer. While a discussion on financial constraints would be provided, I will be focusing more on the theoretical and scientific aspects that inhibit the development of cancer cure. Possible solutions for overcoming developing cancer cure that are based on studies will then be discussed and explored to determine the principles of how it would work. 2.0 The Current State of Cancer Research 2.1 Development Processes in Clinical Studies Developing a new drug is an expensive, time-consuming process that usually takes ten years to push through. Development and determination of effectiveness of possible cancer treatment usually comes in the form clinical trials. Clinicaltrials areresearch studies wherein the treatment is applied to human patients to determine if it is effective. Regulating bodies such as the Food and Drug Administration (FDA) oversee medical and ethical panels that review the research methods and ethics of the clinical trial to be undertaken and monitor the trial phases. The standard phases are the following (Coleman, 1998): Synthesis and Purification (1st and 2nd year) - researchers identify a substance that may be useful as a drug. Animal Testing (1st and 2nd year) - the substance is tested on animals to obtain preliminary information on whether the drug is safe and how it is metabolized in the body. Phase 1 Clinical trials (3rd year) - patients who have advanced cancer and are not helped by any other known treatments are recruited for the trial. They would be subjected to an analysis for the best dosage and delivery method of a new drug treatment. Phase 2 Clinical trials (4th and 5th year) - the drug is tested with groups of patients each having a different type of cancer. This is done to determine what types of cancer can the

The Development and Applications of the Zoom Lens in Cinematography Essay Example for Free

The Development and Applications of the Zoom Lens in Cinematography Essay With the birth of cinema just over a hundred years ago, the progresses made between now and then on the techniques of cinematography have never ceased to amaze audiences. Certainly, many of us could remount moments in our lives when we have felt awed by the movies and satisfied that our money’s worth was redeemed in a flurry of special effects; however, very few of us would be inclined to understand just how much effort was put into designing a very necessary part of any film production: the lens. Not only is a properly designed lens crucial to the quality of picture, but it could also save valuable time and money for the DP and Producer, respectively. This is especially true for the zoom lens, and serves as a main initiator for the constant research that is going into the instrument. Unlike fixed focus lenses, zoom lenses are image-forming optical systems which are capable of producing images of different sizes of an object from any definite distance (Clark, 4) How it achieves this effect is by moving groups of lenses within the system in a carefully coordinated fashion, using the lenses to appropriately bend the light and focus for our viewing purposes. As simple as it may sound, the science of zoom lens design is an extremely complicated subject that involves rigorous mathematical calculations that are beyond the scopes of this term paper. The zoom lens has always been essential and existent all-throughout the history of film and cinematography and it has been used it so many films that can help depict various elements such as character emotion and setting tones. However, in order to provide a general understanding of key aspects in zoom lens design, an attempt will be made to summarize one hundred years of technological advancements. Perhaps the very first hints of a zoom lens may be spotted in an 1834 article from the Proceedings of the Royal Society, by Peter Barlow (Clark, 3). Barlow noticed that by combining a negative lens (bi-concave lens) with a telescope, which contained positive lenses (bi-convex lens), he could vary the magnification of the viewed object in any proportion while never having to lose sight of the object. Although interesting, this was a discovery made only for applications on a visual instrument, and not one which could be used in combination with the photographic camera. In the 1890’s, the development of the varifocal telephoto lenses produced the first camera-associated zoom-like lenses (Kingslake, 4). These lenses used a similar two-lens system when compared to Barlow’s, yet they provided more readily varied focal lengths by utilizing a rack and pinion mechanism to control the distance of separation between the two lenses. Unfortunately, these lenses proved to be extremely cumbersome to operate, a possible attribution to its lack in popularity at that time. Not only was the image quality inadequate due to the focusing limitations of the photographic plate, a large bellows extension was required to compensate for the varying image distance during zooms (Clark, 4) At around the same period in 1902, C. C. Allen took a different approach towards creating a variable-focus lens (Clark, 4). The â€Å"Allen lens†, as it came to be known, utilized a three-lens system that contained an axially movable middle lens and two stationary outer lenses. This system was unlike the telephoto lens in that it did not require a bellows extension as its image distance remained identical for two positions of the middle lens. While there was the presence of focus defects with lens movement beyond these two positions, they were usually tolerable over a narrow range of focal lengths. This narrow focal range inevitably placed great limitations on this system’s zooming capacity. The stage has been set for the two major types of zoom lens that shall remain in constant competition with each other over the next 100 years: Machinally compensated and optically compensated zoom lenses. The telephoto lens could be thought of as the ancestor of all mechanically compensated lenses (Clark, 5). These lenses are heavily dependent on the use of cams to produce an independent, non-linear relationship between the movements of its zoom elements, which in turn achieve the change in power of the lens and maintain the image at some fixed plane (Clark, 12). On the other hand, the Allens lens could be thought to be the originator of all optically compensated lenses (Clark, 5). These lenses maintained a fixed, linear relationship between the movements of its zoom elements, often though means that directly connect the elements together. Like the Allen lens, all optically compensated zoom lens inescapably produces focus defects, resulting in a final image which oscillates around a mean focusing position (Clark, 30). With the above designs nowhere near perfect, subsequent improvements in lens design all worked to improve both the zoom range and the correction of lens aberrations. In 1932, the Bell Howell Cooke â€Å"Varo† zoom lens became the first ever true zoom lens developed for 35mm cinematography (Warmisham and Mitchell 339). The â€Å"Varo† was a mechanically compensated zoom lens which used cams to operate a variable three-element system, and provided a maximum 3:1 zoom (40 to 12 mm); however, the design was flawed in that with an increasing focal length, the aperture would decrease, creating difficulties in maintaining corrections (Clark, 6). It was still too early and too ambitious of a move for mechanically compensated zoom lenses to be wielding three elements at a time, and lens designers soon reverted back to using only two zoom elements at a time (Clark, 26). After a slow start in the 1930’s, optically compensated zoom lenses came zooming back with the announcement of the â€Å"Zoomar† lens in 1946, developed by F. G. Back for Zoomar Incorporated (Clark, 8). This lens, made for motion-picture cameras, was in improved optically compensated zoom lens that had five positive-component optical elements, the second and fourth being coupled to move together axially. This arrangement allowed the decrease of image shift that is typical of optically compensated zoom lenses (Kingslake, 5). Unfortunately, with as many as twenty-two optical elements altogether, the Zoomar lens suffered from an inability to correct for the Petzval sum, a lens aberration which results in a severely curved image plane. As if to answer for this flaw, in 1949 the SOM-Berthiot â€Å"Pan-Cinor† lens was introduced (Kingslake, 5). Developed by R. H. R. Cuvillier, this was yet another optically compensated zoom lens; however, it differed from the Zoomar in that instead of using an all-positive lens system, the Pan-Cinor lens coupled a pair of positive components with a negative component in between them (Kingslake, 5). This simple addition of a negative component provided the necessary correction to lens aberration such as the Petzval sum, and ultimately made the Pan-Cinor lens far superior to the Zoomar lens (Clark, 9). Meanwhile, led by H. Hopkins, the mechanically compensated zoom lenses had their share of progress from 1945-1950 (Clark, 9). H. Hopkins was able to design a system that was basically symmetrical, with two negative middle units which mirrored one another’s movements and two identical, fixed positive outer units, this symmetry greatly aided in the correction of lens aberrations (Clark, 24). One of the most renowned advances in the field of optically compensated zoom lens was made in 1953 by L. Reymond (Clark, 9). By reversing the powers of the Pan-Cinor lens, he created a system comprised of two coupled negative elements moving with a positive stationary element between them; in addition, Reymond added another stationary positive element to the front of the unit, making it a four-lens optically compensated zoom unit. What this setup was able to achieve was a drastically reduced image plan oscillation as well as four points of correct focus throughout the zoom range instead of the traditional three points (Clark, 9). This was truly a breakthrough for optically compensated zoom lenses. For the mechanically compensated zoom lens, it had to wait until 1971 for its next breakthrough (Clark, 26). In response to the demands made for a zoom lens optimized with a wider angle of view and shorter working distance, G. H. Cook and F. R. Laurent introduced a three-zoom-element system. This lens was capable of covering the most frequently used focal lengths of the fixed-focus lenses in 35 mm cinematography, and produced comparable image quality to fixed-focus lenses (Clark, 27). This brings us to the end of a period in zoom lens development in which there is a clear-cut difference between one class of lens versus the other. Although many cinematographers may prefer the sharp focus of the mechanically compensated lens over the simplistic operation of the optically compensated lens, a merging of their best qualities was inevitable in pursuit of perfection (Clark, 28). As the complexity of zoom lens design increased with higher expectations for performance, manual design would no longer suffice. Soon, lens designers found the perfect solution: the computer. With the progression of zoom lens development into the 1970’s, computer optimization programs became a standard tool for lens designers (Kienholz, 1443). These programs increased the efficiency of lens design drastically, as observed when Kienholz re-designed a 1956 lens using the Grey program on a CDC 6600 computer in 1970. Post-optimization, it was shown that the final lens had 11. 8%, 4. 9% and 9. 7% reduction in lens distortion for the wide-angle, intermediate, and telephoto positions of the zoom lens (Kienholz, 1451). In addition, there were improvements in almost all parameters including lateral color and image quality throughout the zoom range. Computer optimization programs can also be seen to work in tandem with other technological advancements. In the early 1990’s, â€Å"aspherical lens† became hot research item due to its exceptional ability to correct aberrations that were commonly associated with conventional spherical lens (Betansky, 657). The use of aspherics would therefore provide ways to decrease the number of lens elements originally used for the purposes of aberration correction, making a zoom system more compact (Yatsu, Deguchi and Maruyama, 663). At the same time, the design of zoom lenses containing aspherical components became even more complicated due to an increased in design parameters. Here, computer optimization programs were used to analyze the parameters one by one and generate a proper design solution (Yatsu, Deguchi and Maruyama, 663). Today, computer programs have become so powerful that precise prediction of various aberrations is possible (Usui et al. , 389) These new simulation programs allow DP’s to give input as to what â€Å"look† they think the perfect zoom lens should produce while allowing researchers to translate their expectations into technical designs. We have truly arrived at a new era for the design of zoom lens, where lens designers, with help from DP’s, can create very practical technical masterpieces that convey artistic ideas from the director’s mind into the audience’s eyes. Now the a general history of the zoom lens has been provided, now we will be looking at how the zoom lens has been used in film productions. With its varifocal properties, the original purpose of a zoom lens was to allow cinematographers to use one lens only throughout the entire shooting process, thereby generating more efficiency. However, the ability of the lens to zoom during shots and the visual effects generated in such shots became much more valuable tools for creative directors. Film makers often choose to employ zoom lens due to its ability to relay a sense of realism to the audiences- by zooming in from a distance, it is possible to simulate the effect of watching someone or some act in secrecy. One example of a film that used this effect extensively is Steven Spielberg’s Munich (2005), which depicted the trauma that hits an Israeli assassin who was seeking revenge from the terrorists responsible from the 1972 Munich massacre. Spielberg and his DP not only used the zoom effect to depict a more realistic fitting sense of espionage, but they also wanted to make the film feel as if it were really taking place in the 70’s. This gave the setting of the film a more authentic feel to the audience. A similar usage of the zoom lens can be seen in Alan Rudolph’s Afterglow (1997). Being a film with a plot that revolves around adultery and emotions, Rudolph wanted to give his shots a voyeuristic feeling (A Luminous Afterglow). By combining long takes with well-choreographed zoom shots, Rudolph was able to guide the audience through performances developed during the course of a shot and allow them to â€Å"watch† the actors, exploring the scenes in ways they would never dare. Perhaps one of the most well-known zoom effects is the â€Å"dolly zoom†, or alternatively called the â€Å"Vertigo zoom†. This technique was pioneered by Alfred Hitchhock in his classic film Vertigo (1958). This effect basically stimulates the dizzying sensation of vertigo by zooming in one direction and dollying in another direction (Ashcer and Pincus, 98). In Vertigo, the main character John â€Å"Scottie† Ferguson develops a severe case of altophobia. The dolly zoom is used to show an altophobic reaction in Scottie’s point of view to show the audience what the character is experiencing due to his case of vertigo. Thus far, this same effect has been widely popularized in features from the Thriller or Horror genres, commonly used to express extreme emotions of the subjects (Valluri). Another example is a film again by Steven Spielberg. In Spielberg’s thriller film Jaws (1975), he was able to re-popularize the â€Å"Vertigo zoom† in a memorable shot of a dolly zoom into a character’s stunned reaction at the climax of a shark attack on a beach (after a suspenseful build-up). With the widespread application of zoom lenses in the film industry today, it is hard to imagine that even just thirty years ago, it was considered impossible to produce a zoom lens whose image quality is comparable to ones generated by fixed focus lenses (Clark, 2). Indeed, the application of zoom lens has always been essential and existent all-throughout the history of film and cinematography and it has been used it so many films that can help depict various elements such as character emotion and setting tones. Zoom lenses have come a long way in over a hundred years, and it is without a doubt that with the progression of cinematic technology, even more picture-perfect zoom lenses would be developed to fit the needs of the motion picture production communities. Works Cited Ascher, Steven, and Edward Pincus. The Filmmaker’s Handbook. New York: Plume, 1999 B, Benjamin. â€Å"The Price of Revenge. † American Cinematographer 87. 2 (2006) 1-3. 6 April 2010 http://www. theasc. com/magazine/feb06/munich/page1. html. Clark, A. D.. Zoom Lenses, Monographs in Applied Optics Vol. 7. New York: American Elsevier Publishing Company Inc. , 1973. Fumiaki, Usui, Jun Osaya, Ken Ito, And Laurence Thorpe. â€Å"A New HD Cine Zoom Lens For Digital Motion Pictures. † SMPTE Motion Imaging Journal. Oct/Nov (2005): 383-395 Kienholz, D. F.. â€Å"The Design of a Zoom Lens with a Large Computer. † Applied Optics. 9(6)(1970): 1443-1452. Kingslake, Rudolf. â€Å"The Development of the Zoom Lens. † Journal of the SMPTE. 69(1960): 534-544.

Ulysses meaning Odysseus Essay Example for Free

Ulysses meaning Odysseus Essay â€Å"Ulysses† is a dramatic monologue written by one of the most famous poet Alfred Lord Tennyson in 1883. â€Å"Ulysses† meaning Odysseus in Greek mythology was the king of Ithaca. Odysseus was the leader of the Greek army. His wife was Penelope and his son was Telemechus. Ulysses is characterized as not only very intelligent, heroic and eloquent but also very arrogant. Odysseus and his men sailed into Troy to fight what turned out to be a lengthy battle. Later, Odysseus and the Greek army conquered Troy and set out on their voyage home. On their journey they encountered a series of adventures. Odysseus shares some grievances including dissatisfaction, desire for change, nostalgia and age concern. Tennyson’s characterization of Ulysses with grief, feelings, expressions and misfortunes are reflected in the poem. Odysseus shared beauty and success during his youth. He had an extremely successful past life. He was a handsome man in his prime and endured many exciting adventures. Ulysses describes how he â€Å"drunk delight of battle† (Tennyson 16) with his peers. He talks of â€Å"souls that have toil’d, and wrought, and thought with me† (Tennyson line 46) and the use of rhyme suggests the harmony of his relationship with his peers. This explains that he had endured much suffering and the use of the word ‘thought’ introduces the point that he was a great thinker; he was not only practical with his hands, but also good on his mind. His nostalgia and desire to return to his active past is expressed when he parallels himself to a sword and says, â€Å"how dull it is to pause, to make an end, to rust unburnished, not to shine in use! † (Tennyson lines 22 23) Ulysses is able to dream of one last, glorious adventure within the potential to go out and recapture former self. Ulysses is a poem which explores multiple interactions in which the themes vary on mortality. Motivation and age concern are the part of the poem’s themes as Tennyson explain in the lines â€Å"but every hour is saved from eternal silence† (Tennyson lines 26 27) which portrays the death in eternal silence and he is almost preventing it by making the most of his time. â€Å"For always roaming with a hungry heart† (Tennyson line 12) shows his motivation and also indicates his loss of love as he describes â€Å"match’d with an aged wife† (Kincaid) an ironic image of describing his wife who had been loyal to him during the vast amount of time while he was away on adventure. He also states that the people of his island are a â€Å"savage race† (Kincaid) and says that they â€Å"hoard, and sleep, and feed† (Kincaid). He goes on to say that they â€Å"know not me† (Kincaid) drawing barriers between him and them, as though he is superior. When he says â€Å"I am become a name† (Tennyson 11) shows clear pity as well. The poem is also like a speech given by Odysseus to his sailors, rebelling against his life and conformity, after he reclaimed the throne in Ithaca and explains why he wants to leave Ithaca forever. Ulysses believes that his son ‘Telemechus’ is better for Ithaca than he would be and placed him in charge as the King of Ithaca. Ulysses says â€Å"There lies the port; the vessel puffs her sail† (Tennyson line 44) which means he also feels the ocean his boat calling him for one more adventure. He tries to inspire his men by saying â€Å"Come, my friends, T is not too late to seek a newer world† (Tennyson lines 56 57). The poem is ended by Ulysses telling his men â€Å"not to yield† (Tennyson 70) but to rebel and never conform to society. Tennyson is very successful in creating a very powerful image of Ulysses. The poem celebrates the indomitable spirit of a man. Ulysses loves travelling by sea and he is used to a life of adventure and change. The life of a family man with his responsibilities of a king is dull for him. He yearns to recover the glory of the past by returning to Ithaca. He tries to persuade his earlier fellow men to join him in his new adventure. He wants to break free of his monotonous life and return to a life of excitement. At the end Ulysses placed his son in charge as the King of Ithaca and set his sails west to an untold adventure. Works Cited James R, Kincaid. â€Å"Ulysses† Victotianweb. org 28 March 2001. 29 March 2009 http://www. victorianweb. org/authors/tennyson/kincaid/ch3d. html Tennyson, Alfred. â€Å"Ulysses† Readprint. com 29 March 2009 http://www. readprint. com/work-1426/Lord-Alfred-Tennyson

Ant Colony Optimization Algorithm

Ant Colony Optimization Algorithm To solve the planning problem, we proposed an ACO algorithm with further designed. ACO builds solutions in a step-by-step manner and enables the use of problem-based heuristics to guide the ants to search the way; it is possible to design heuristics are useful to direct the ants to schedule the critical tasks as early as possible and to assign the project tasks to suitable employees with required skills. The Ant Colony Optimization promises to give solution with fast and perform well on the given problem. In consideration of the previous experiments, the proposed approach is compared with four other approaches on three real projects with randomly generated instances. Ant Colony Optimization algorithm can be described as the repeated execution of the following three main procedures: Solution construction Pheromone management Daemon actions The solution construction strategy in the proposed algorithm has two steps: 1) Construction of the task list 2) Construction of the matrix for employee allocation. The pheromone values are to be updated by the local and the global updating rules. 6.2 Software Environment 6.2.1 Features of .Net Microsoft .NET is a set of Microsoft software technologies for rapidly building and integrating XML Web services with Windows-based applications, and Web Application solutions. The .NET Framework is a language-neutral platform for writing programs that can easily and securely interoperate. There’s no language barrier with .NET: there are numerous languages available to the developer including Managed C++, C#, Visual Basic and Java Script. The .NET framework provides the foundation for components seamless interaction locally or remotely on various platforms. Net mainly standardizes the common data types of various languages and communication protocols so that components created in different languages can easily interoperate. â€Å".NET† is also the collective name given to various software components built upon the .NET platform. The .Net platform will provide to develop both products and services (like .NET My Services, Passport and so on). 6.2.2 The .Net Framework The .NET Framework has two main parts: The Common Language Runtime (CLR). A hierarchical set of class libraries. The CLR is the key feature of .net that described as the â€Å"execution engine† of .NET. It provides the common execution environment to execute programs which will be implemented in different languages. The main features .Net is Converting a low-level assembly-style language which is called as Intermediate Language (IL), into a native code (0’s and 1’s) to the platform being executed on. The new feature garbage collection that manages the memory efficiently. Verifying and also enforcing security restrictions on the code when it is running. Contains version control feature that maintains different versions of the programs and other such features. The following some other features of the .NET framework are described: Managed Code The programming language code which targets .NET framework is called managed code. Both managed and unmanaged code can be running at the runtime, but only the managed code contains the information that allows the CLR to make guarantee and execute, for any instance, the safe execution and interoperability. Managed Data Managed Code comes with the Managed Data. Common Language Runtime provides allocation of memory and dealing location facilities, and also garbage collection. Some .NET languages use Managed Data by default; those are like C#, VB .NET and JScript.NET. Targeting Common Language Runtime will be depending on the languages are using; make certain constraints on the available features. With the managed code and unmanaged code, one can have both the managed data and the unmanaged data in .NET application development the data that doesn’t get garbage collected but instead is looked after by unmanaged code. Common Type System The CLR uses something called the Common Type System (CTS) to strictly enforce type-safety for different languages supported by .Net. This will ensure that all classes which are implementing should be compatible with each other class, describing these types in a common way. Common Type System that defines how types (classes, interfaces, structures†¦) work at the runtime, which also enables these types in one language that interoperate with the types(classes, interfaces,..) in any other language, including with cross-language exception handling. CTS will ensure that the types are only used in a particular way; the runtime environment also ensures that the code does not make attempt to access any memory that is not allocated to it. Common Language Specification The Common Language Specification provides built-in rules and specifications that support for different languages interoperability. It also ensures that can be developed managed code is fully used by different developers using various programming languages, a set of language features and specifications has been defined in Common Language Specification (CLS). The components which follow these specifications and expose only Common Language Specification features are considered as CLS-compliant code. 6.2.3 The Class Library .NET provides one more special feature called base class library contains hierarchy of classes that are in built. Base class library defines more than 1000 types of inbuilt classes. Each and every class that defined in special construct called the namespace. The root namespace defined System or System.Object. System namespace contains basic types like Int16, Byte, Double, and String, etc. as well as Object. Objects of any class that derived from the System.Object. All the types have been differentiated into two types, Value types and Reference. Value types can be allocated in the stack memory that can provide more flexibility. Also having features called boxing and unboxing, boxing means of converting value types to reference types and vice versa. The base class library (BCL) is a library of classes that are pretty comprehensive. BCL providing generic collections, network I/O, Security, threading, and so on, which provides also XML and database connectivity using ADO .Net. The base class library is subdivided into groups of related namespaces; each namespace provides variety of classes that are related logically. 6.2.4 Languages Supported By .Net The multi-language capability of the .NET Framework and Visual Studio .NET tool enables the programmers to use their programming skills to develop different types of applications like standalone applications, Web services, and web applications. The .NET framework also supports different versions of languages like Visual Basic, C++, VB.NET, and Managed C++, and so on. C# is an object oriented programming language used to develop the various applications like web, windows, web services,†¦there is no standard library for C# on its own but it has been designed with the help of using the .NET libraries. Fig. 6.1 Net Framework C#.NET is also compliant with Common Languages Specification and that supports structured exception handling with System Exception namespace. Common Language Specification is a set of rules that are followed by the Common Language Runtime. CLR is the execution engine provided by the .NET and it performs the execution of the code, makes the development process very easy. The objects or components that created by C# able to use in other CLS-compliant languages. Can be use objects and components created in any other CLS-compliant languages in C#.NET. The CLS ensure that complete interoperability between applications, regardless of the different languages used to design the application. 6.3 Features of SQL-Server SQL-Server is a Microsoft’s official data base server which will use to maintain large number of tables with relations. The OLAP Services feature available in SQL Server version 7.0 is now called SQL Server 2005 Analysis Services. The term OLAP Services has been replaced with the term Analysis Services. Analysis Services also includes a new data mining component. The Repository component available in SQL Server version 7.0 is now called Microsoft SQL Server 2005 Meta Data Services. References to the component now use the term Meta Data Services. The term repository is used only in reference to the repository engine within Meta Data Services. SQL-SERVER database consist of six type of objects. They are, Table Query Form Report Macro

Do Cleaning Chemicals Clean As Well After They Have Been Frozen :: essays research papers

Do Cleaning Chemicals Clean As Well After They Have Been Frozen Problem:   Ã‚  Ã‚  Ã‚  Ã‚  The researcher is trying to determine whether or not cleaning materials will clean as well if they have been frozen solid and subsequently thawed out until they have returned to a liquid state of matter.   Ã‚  Ã‚  Ã‚  Ã‚  The researcher will use Dial Antibacterial Kitchen Cleaner, Clorox Bleach, and Parson's Ammonia, applied to simple bacon grease, to determine which chemical is least affected by the glaciation. Hypothesis:   Ã‚  Ã‚  Ã‚  Ã‚  The researcher feels that the process of glaciation will degrade the ability of these three household cleaning chemicals to breakdown the most common kitchen cleaning problem - grease.   Ã‚  Ã‚  Ã‚  Ã‚  For example, the freezing, thawing, and then freezing again of ice cream puts the substance through the freezing process. The result is a separation of heavy and light substances which breaks down the food. The researcher feels that the same end result may happen with the cleaning materials. Experimentation Test Concept:   Ã‚  Ã‚  Ã‚  Ã‚  In order to determine weather the glaciation process affected the cleaning chemicals, it is first important to establish its potency prior to freezing. Accordingly, two test sets were created by the researcher. The purpose of the test was to determine how well the chemicals could break down household grease before and after the substances were frozen. The first test set would focus on unfrozen chemicals, while the second was set up for previously frozen chemicals. The Test:   Ã‚  Ã‚  Ã‚  Ã‚  To start the experiment the researcher fried four pieces of bacon until there was enough grease in the skillet to perform the test. He then put a quarter teaspoon of the grease onto two nine by thirteen casserole dishes. Each casserole dish was set up for three frozen and three unfrozen chemical cleaners. A measured amount of cleaner (both frozen and unfrozen) was added to each spot of grease. After approximately two minutes of breaking down the grease, the dishes were raised to a uniform height at one end and the broken down grease was allowed to run. By measuring how far the grease ran, the researcher could then determine how much the cleaner broke down and therefore which cleaner was