Spiders in Space on Skylab 3

Spiders in Space on Skylab 3 Anita and Arabella, two female cross spiders (Araneus diadematus) went into orbit in 1973 for the Skylab 3 space station. Like the STS-107 experiment, the Skylab experiment was a student project. Judy Miles, from Lexington, Massachusetts, wanted to know if spiders could spin webs in near-weightlessness. The experiment was set up so that a spider, released by an astronaut (Owen Garriot) into a box similar to a window frame, would be able to build a web. A camera was positioned to take photos and videos of the webs and spider activities. Three days before the launch, each spider was fed a house fly. They were provided with a water-soaked sponge in their storage vials. The launch took place on July 28, 1973. Both Arabella and Anita needed some time to adapt to near-weightlessness. Neither spider, kept in holding vials, voluntarily entered the experiment cage. Both Arabella and Anita made what has been described as erratic swimming motions upon ejection into the experiment cage. After a day in the spider box, Arabella produced her first rudimentary web in a corner of the frame. The next day, she produced a complete web. These results prompted the crewmembers to extend the initial protocol. They fed the spiders bits of rare filet mignon and provided additional water (note: A. diadematus can survive up to three weeks without food if an adequate water supply is available.) On August 13th, half of Arabellas web was removed, to prompt her to build another. Although she ingested the remainder of the web, she did not build a new one. The spider was provided with water and proceeded to build a new web. This second complete web was more symmetrical than the first full web. Both spiders died during the mission. They both showed evidence of dehydration. When the returned web samples were examined, it was determined that the thread spun in flight was finer than that spun preflight. Although the web patterns made in orbit were not significantly different from those that were built on Earth (aside from a possible unusual distribution of radial angles), there were differences in the characteristics of the thread. In addition to being thinner overall, the silk spun in orbit exhibited variations in thickness, where it was thin in some places and thick in others (on Earth it has a uniform width). The start and stop nature of the silk appeared to be an adaptation of the spider to control the elasticity of the silk and resulting web. Spiders in Space Since Skylab After the Skylab experiment, Space Technology and Research Students (STARS) conducted a study on spiders planned for STS-93 and STS-107. This was an Australian experiment designed and conducted by students from Glen Waverley Secondary College to test the reaction garden orb weaver spiders to near-weightlessness. Unfortunately, STS-107 was the ill-fated, catastrophic launch of the Space Shuttle Columbia. CSI-01 started on ISS Expedition 14 and was completed on ISS Expedition 15. CSI-02 was performed on ISS Expeditions 15 through 17. The International Space Station (ISS) conducted two well-publicized experiments on spiders . The first investigation was Commercial Bioprocessing Apparatus Science Insert Number 3 or CSI-03. CSI-03 launched to the ISS on the Space Shuttle Endeavour on November 14, 2008. The habitat included two orb weaver spiders (Larinioides patagiatus or genus Metepeira), which students could view from Earth to compare the feeding and web-building of the spiders in space against those housed in classrooms. The orb weaver species were selected based on the symmetrical webs they weave on Earth. The spiders appeared to thrive in near-weightlessness. The second experiment to house spiders on the ISS was CSI-05. The goal of the spider experiment was to examine the changes in web construction over time (45 days). Again, students had the opportunity to compare the activities of spiders in space with those in classrooms. CSI-05 used golden orb weaver spiders (Nephila claviceps), which produce golden yellow silk and different webs from the orb weavers on CSI-03. Again, the spiders constructed webs and also successfully caught fruit flies as prey. Golden orb weaver spiders were selected for CSI-05. Joe Raedle / Getty Images Sources Witt, P. N., M. B. Scarboro, D. B. Peakall, and R. Gause. (1977) Spider web-building in outer space: Evaluation of records from the Skylab spider experiment. Am. J. Arachnol. 4:115.

Analyzing a play Essay Example | Topics and Well Written Essays - 500 words

Analyzing a play - Essay Example In addition, the play introduces the elocution of Chicanos, composing of code switching linking Spanish and English. The main conflict displayed in the play is racism. It is shown by distinguishing the Mexican and American stereotype. Miss. Jimenez arrives from the office of the governor to buy a brown skinned robot for the operation because it will look good to own a Mexican type on the staff. Later, Honest Sancho promotes all his models by explaining the characteristics of each model. Secretary comments, â€Å"You still do not understand what is required. It is true we need Mexican models, such as these, but it is more crucial that he be American.† However, the secretary rejects all the models since they did not fit her needs. To solve the case of racism, while facing pressure from the Americans, Mexican-Americans should determine whether they are going to have Mexican American origins. They talk both Spanish and English and this shows that they still have the Chicano origin, but they do not have to disrespect their heritage or ignore the ethnicity. Americans require the Mexican-Americans to be well educated, well-mannered and very hard working, (Huerta 274). Sancho and Miss Jimenez are deviant figures that may be contemplated as role models for Chicanos in the eyes of Anglo-American community. The conflict of social culture that is overcome by Mexicans who exist in the United States is keeping the loyalty toward their own group the external impulsions to turn opposing their own. Miss Jimenez is the one who cannot keep her own discernment so that she loses her ethical identity as Mexican since she contemplates being American. It is exhibited in the play that Miss Jimenez tries to create a new social origin as an American. Secretary, â€Å"No, thank you. The governor possesses a luncheon this afternoon, and we require a brown face in the throng. How do I drive him?† Sancho is the main protagonist; in the play, he is portrayed as a

A accounting calculations Essay Example | Topics and Well Written Essays - 500 words

A accounting calculations - Essay Example According to Caplan (2006) suitable methods like value engineering and value analysis could contribute to reducing the cost of the three products. It helps in sorting additional overhead components like cooperative marketing, high levels of customer service, and product return handling to identify profitable customers. The approach enables the organization to put more emphasis on clients who earn large profits for the company while turning away unprofitable customers (Caplan, 2006). Distribution of product is a major undertaking for all enterprises. Most companies employ different channels of product distribution like email, distributors, the Internet, retails shops, and order catalogue. Reducing distribution cost is the primary function of ABC. Structural components that maintain the distribution falls under overhead. Therefore, ABC helps in deciding efficient delivery systems with lower costs or dropping unprofitable channels (Caplan, 2006). ABC helps the management decide on whether to buy or make a product. It does this by highlighting costs associated with product manufacturing. Such is the basis that guides one to either outsource or carry out in-house manufacture. Using ABC makes it easier to allocate overhead costs appropriately. Such allocation assists in determining margins of product lines, products, and their subsidiaries. The information guides the personnel to identify areas that would give maximum return margins (Caplan, 2006). The model assists marketing managers decide on the minimum price for the product. ABC model guides the marketing personnel to select particular overhead costs for inclusion in the minimum cost. The approach eradicates the possibility of selling a product at a loss or overpricing (Caplan, 2006). Using ABC model increases the cost pool volume, which increases the cost incurred to manage the system. A reduction in cost pool involves running a system that analyses and maintains the cost

Cultural Diversity in Criminal Justice Paper Essay

Cultural Diversity in Criminal Justice Paper - Essay Example Racial disparity in sentencing has become a problematic issue. There are many people who believe that this disparity does not exist. But there is substantial proof to prove that it does exist. According to Marc Mauer, there has been an "unprecedented rise in the prison population over the past three decades a six fold increase, leading to the incarceration of nearly two million Americans† and that â€Å"One of every eight black males in the 25-34 age groups is locked up on any given day and 32% of black males born today can expect to spend time in a state or federal prisons if the current trends continue." (Mauer 2004) Racial disparity in sentencing in courtrooms today is a very real issue and needs be addressed with measures that will fundamentally change the judicial system and the structure of sentencing in such a way that racial disparity in sentencing can be eliminated. According to The Sentencing Project (2000) â€Å"Racial disparity in the criminal justice system exists when â€Å"the proportion of a racial/ethnic group within the control of the system is greater than the proportion of such groups in the general population† and that â€Å"Illegitimate or unwarranted racial disparity results from the dissimilar treatment by the criminal justice system of similarly situated people based on race. In some instances this may involve overt racial bias, while in others it may reflect the influence of factors that are only indirectly associated with race. † (The Sentencing Project, 2000, p. 2) The general consensus is that disparity is seen in all stages of the judicial process. This includes biases in policing, prosecution and sentencing. Studies have shown that racial disparity is a growing problem. especially so in cases of arrests or sentencing in connection with drugs .The minorities that includes African Americans , Native Americans and Hispanics, when they are arrested or sentenced for a drug crime have far more to fear from

Discussion Questions Essay Example | Topics and Well Written Essays - 500 words - 37

Discussion Questions - Essay Example seven general principles applied by Steve Jobs which resembles the innovation and creativity are do things which people love, aspire which can help to change the world, reset brain, sell dreams to people, neglect unnecessary, create insanely and finally mastering the way of delivering message to the customers. Thomas Edison is another creative thinker. Thomas Edison is regarded as the most famous inventor and creative. Ideas of Thomas Edison on application of creativity and innovation are to focus on creative mind power and work on the ideas which have been previously worked by others. Something that occurs within the organization is referred to as internal driver of innovation. The forces outside the organization motivate and enables Company to trigger the mode of innovation for betterment is knows as external forces of innovation (Luke, 2013). External factors are changing economy, market, social changes, government policy, new trend, introduction of new technology. Internal driver of innovation is cost reduction, new product, changes in structure of organization, advance level of technology and innovation camps for brainstorming. The application of innovation is done by companies by reinventing the core business process. Effective organizational structure, ethical cultural background and processes that are designed in an organization can lead to innovation. These divers are applied in an organization by maintaining effective workplace and installing collaboration and partnering in business organization. There is no specific instance for production of positive result. The implementation of innovation in organization can produce result by the help of trial and error experiment. The active implementation of vision and strategy can help to produce positive result. The introduction of new services, products and technologies in an organization to gain competitive advantage over other competitors

Functional languages vs. imperative languages Essay

Functional languages vs. imperative languages - Essay Example Imperative languages are greatly influenced by the von Neumann architecture due to their high dependency on an instruction counter and a store. They have control structures, like for loops and while loops, which make incremental changes to the memory while iterating over instructions. Programs written in imperative languages are statement oriented, and their principle operation is the assignment of values to variables; in other words, computation is performed with side-effects (Lee 118). Unlike imperative languages, functional languages do not rely on the Von-Neumann architecture as they do not have any concern with variables but only data objects and values. The principle operation of functional languages is function application, and they treat functions as first-class objects that may be stored in data structures, passed as parameters, and returned as function results. Programs written in functional languages contain no variables, loop statements, and assignment statements, and use parameters and return values to communicate values; in other words, computation is performed with no side-effects (Lee 119). Imperative languages heavily rely on side-effects to implement their state and perform their operations. On the other hand, functional languages lack side-effects which allow them to always produce the same result when given with the same parameters. This characteristic of functional languages is called ‘referential transparency’ which makes the semantics of these languages far simpler than the semantics of imperative languages (Kedar and Thakare 6-4). In functional languages, the return value of the function can be of any data type including function type. But this is not possible in imperative languages; functions defined in imperative languages are restricted to return values of specific data types (Kedar and Thakare 6-4). Programs written

Discussion Questions Essay Example | Topics and Well Written Essays - 500 words - 37

Discussion Questions - Essay Example seven general principles applied by Steve Jobs which resembles the innovation and creativity are do things which people love, aspire which can help to change the world, reset brain, sell dreams to people, neglect unnecessary, create insanely and finally mastering the way of delivering message to the customers. Thomas Edison is another creative thinker. Thomas Edison is regarded as the most famous inventor and creative. Ideas of Thomas Edison on application of creativity and innovation are to focus on creative mind power and work on the ideas which have been previously worked by others. Something that occurs within the organization is referred to as internal driver of innovation. The forces outside the organization motivate and enables Company to trigger the mode of innovation for betterment is knows as external forces of innovation (Luke, 2013). External factors are changing economy, market, social changes, government policy, new trend, introduction of new technology. Internal driver of innovation is cost reduction, new product, changes in structure of organization, advance level of technology and innovation camps for brainstorming. The application of innovation is done by companies by reinventing the core business process. Effective organizational structure, ethical cultural background and processes that are designed in an organization can lead to innovation. These divers are applied in an organization by maintaining effective workplace and installing collaboration and partnering in business organization. There is no specific instance for production of positive result. The implementation of innovation in organization can produce result by the help of trial and error experiment. The active implementation of vision and strategy can help to produce positive result. The introduction of new services, products and technologies in an organization to gain competitive advantage over other competitors