Data communications and neetworks Essay Example for Free

Data communications and nee devilrks EssayWhat is signalling? Signalling is a term employ for the use of entropy cosmos transmitted or carried across a specialty for object lesson in a network this could be a cat 5 cable. in that respect has to be a way also for the manslayer to interpret the data being send and this is controlled by whats called encoding however the word modulation also means the same thing. The signal that is sent it modified in a way for it to signify data. There are different fibers of transmission methods which differ from what type of medium you are using for causa cables or wireless at that place are four which are listed below 1. Electrical uses your cables to transport data between nodes 2. piano tuner Waves this would be your wireless networks and could also include Bluetooth devices. 3. Light this would use fibre optic cabling to send high speeds of data 4. Microwave Analogue Digital Signalling There are two different types of signal ling and these can be done in Analogue which means it changes all time in both amplitude and frequency. For example an one-dimensional quantify which has its hands moving all the time is changing the time all the time. Whereas with digital signalling which are representations of discrete time signals.For example a digital clock shows the minutes and not the seconds. When the information is being sent over a network when communicating, the information can travel in two forms, these are elongate and digital. The difference between the two is simple that analogue signalling never stops, and the information is being sent continuously, a good example of this signalling is clocks. An analogue clock ordain never stop, as the second hand is always ticking, therefore one can record an accurate reading of the time to the second, or even millisecond. For example, 1 hour 15 minutes and 24 seconds.Appose this to digital signalling where one can not get an accurate reading of a clock as it wi ll only show the minutes. And therefore is not continuous. This is because the data is consisting of separate enjoins, which are on or off. Sine Wave This type of wave has two properties a Amplitude Frequency, the amplitude represents the strength of the signal which would be the volume of a sound for example somebody talking. If the amplitude is stronger than it will travel further. The frequency of a Sine Wave is the rise and fall of the wave from the zero to the top and past back to the zero this is known as a cycle and is measured in Hz.The higher frequency the more cycles and therefore the lower the frequency the lower the cycles. Analogue The image below shows the analogue type of signalling its constantly changing and represents all the regard ass in the wave range, there is always a value in between a value and another. http//moodle. derby-college. ac. uk/mod/resource/view. php? id=2346 Digital With digital signalling there are no in betweens like there in analogue its simply either 1 or 0, digital represents separate states and the change between these are practically unnoticeable. http//moodle. derby-college.ac. uk/mod/resource/view. php? id=2346 Asynchronous Transmission Asynchronous transmission is when signals are not sent at regular intervals. A good example of this would be a user using a keyboard attached to a computer. The characters are sent irregularly however the bits must be sent at known intervals. This is done by having accurate clocks at both ends of the link. The receiving clock starts when it receives the first base bit from the transmitter, this is also known as the start bit. The receiver then expects to receive a known number of bits every tick of the clock.When it has received these bits the clock may stop the last bit is known as the stop bit. Synchronous Transmission However when large volumes of data are to be transferred, the use up of the stop and stop bits with every character means that asynchronous transmission is n ot an efficient method. With high-speed devices, and buffered low-speed devices, data can be transmitted in large, timed, synchronous blocks. The clocks, in the receiver and transmitter, are kept synchronised by sending regular groups of special characters called SYN characters.Each time one of these groups is detected the receiver re-sets its clock, the data apart from this, its transmitted in exactly the same way as for asynchronous transmission. We can visualise the data as follows Bit synchronicity In a digital signal, as well as on occasion, an analogue one, all the different devices must know how often the signal varies on the transmission medium. For example, if the speed of the changes goes faster then the rate at which the device checks for changes, there will be a few of the bits missed between ideals.If then sampling rate goes faster then the rate at which the transmission goes, the same bit will be used for a different sample a second time. To combat this fact, the de vices are made to a universal standard so that they can work together in harmony, and there are set systems in place to allow the data to be transferred correctly. A lot of the current technologies use asynchronous serial transmission. This transmission method is used when data is not sent at regular intervals, but the bits themselves have to be sent with regularity, some examples of these are keyboard, mice or even modems.During the spans of time that no signal is sent, the line or other medium is in what is called an idle state. This is defined by the constant 1 signal being sent. One there is a packet of data that needs to be sent, for example, a key on the keyboard is pressed, the receiver first gets a start bit, a 0 state instead of a 1 to define the beginning of a piece of data now being sent to the receiver, it is then sampled and at the end of the data transmission, the signal returns to the original constant 1 state. encode Methods encoding simply means that the informati on is converted from one format to another format.This is a exhibit that the data needs to have done to it before the computer can understand it and process it. There are different types of encoding which are Manchester Encoding is a data communications line code which provides a way of encoding binary data sequences. Each bit is related to by at least one voltage level transition. Manchester encoding is said to be self clocking this means that synchronisation of a data stream is possible. Huffman Encoding is another algorithm used for data compression the coding uses a specific method for choosing the representation for each symbol.Unipolar Encoding This type of encoding has 2 voltage states, one of these states is zero and because of this its also know as Return to Zero (RTZ) Unipolar encoding is used in computers logic and an example of where its used in computers is the TTL logic. Polar Encoding Polar encoding is when the digital encoding is on a level with zero volts for exam ple the RS232 standard porthole uses Polar encoding and unlike Unipolar the value doesnt return to zero, its either a positive or negative voltage. With polar encoding it reduces most of the counterweight DC problem.

Hull House, Chicago Illinois Essay Example for Free

take away reside, Chicago Illinois EssayJane Addams and Ellen Gates Starrs work of computer architecture spree, beautifully designed and of scholarly taste, artistic designs and with the flavor of social touch and as said by Regina Buccola the vanguard of the world wide settlement fellowship movement, was dawned in 1889 as Hull fellowship. It was starting among the few settlement houses with uniqueness lying in its spearheading a national movement making the thoroughfare for the fundamental law of five hundred more settlements by 1920. Addams efforts earned it as one of the most reputed settlement houses in the United States. Hull mark became a landmark piece more as a political and social intrigue instead of architectural. The complex was a dream of Addams to make it a place for the social and economic emancipation of women. She was from the prosperous family and was very well conscious of her position as among the few of the first generation of women getting hazard for education. Hull House was part of her passionate appeal to bring the women at the front, and give them liberty to assert their thought sour. Hull House was primarily guide by women, although men were also involved in it as well.In its vicinity, women found liberated from subjugation while giving them lots of opportunities in the cosmos sphere. Many of the buildings of Hull House were designed by architect Allen Pond taking the inspiration and idea from the Gothic architecture of Toynbee. While looking at the interior design of the Hall House, one can see the structure itself embodying philosophies of social reformer John Ruskin and the arts and crafts movement of the time. The main mission fag end the settlement was opening of avenues for spreading education and giving women opportunities for participating in social activities.Besides providing needed help to the people, ladies residing in the Hull House were actively participating in social reforms on the local, state and natio nal levels. Hull House was thus the home non just for individual advancement that also for changes that impacted society as a whole. In many decades that followed Hull House became the avenue for the several female figures including Florence Kelley, Alice Hamilton and many more who were instrumental in initiating many of the reforms. Florence and Alice were the ones who validated the social problems of Chicago such as child exploitation, unhealthy and dangerous living and working conditions.It was on account of their efforts that direct to the passing of the legislation for meeting educational needs of students, for providing compensation to workers, making it mandatory for the companies to provide occupational safety and fulfilling several of the social issues. Hull House was also the avenue for the building of first public playground and bathhouse, and created awareness on cleanliness and sanitation issues and their initiation towards formulation of the legal reforms, which le d to the setting of the first juvenile court in the United States.Members of the Hull House had an incredible influence on the setting of urban planning and directing the nationwide variety toward setting of branch library systems. They also initiated upon making proposals for setting up public dispensary to provide nutritious food for the sick, a child day veneration center and public baths for the underprivileged sections of the population. It also became a rejuvenating force behind the changed social and political order. To add to it Hull House also saw the establishment of Chicago Arts and Crafts Society.Journalist Paul Kellogg also termed the group of Hull House residents as the Great Ladies of Halsted Street as to their altruistic efforts. The Hull House complex was fully accomplished seemingly forming into full circle by the end of twentieth century. Now the University of Illinois spread on to the city kibosh with the original one mansion and one adjoining structure all th at remains on the site. These two buildings now support the Jane Addams Hull-House Museum.Though now it does not have any centralized location still it is rendering its base for the various social service activities and programs through out the city. Hull House was no doubt an avenue of great historical importance, for the initiation of many of the reforms to its credit but it cannot be deemed as a great endowment for architectural delight. doubting Thomas Wolfe was highly critical of the buildings and the mansions influenced by Modern Architecture and International Style in his book From Bauhaus to Our House.He criticized the architectural works for their adhering and laying base to their thoughts process to theory and placing the architecture on the political philosophy. He said that like in the literature or the works of art, if the scrutinized eyes of creators frame the architecture world, no one would appreciate it. According to Wolfe, many of the architects had no prior goals but to be always thinking like futuristic. All in all, Hull House will always remain as an emblem of social grace and reformation.

PESTLE analysis of Nike

PESTLE analysis of NikeNike is a global brand specialising in the design and manufacture of athletic apparel, footwear, accessories and equipment it is headquartered in the joined States, Europe, and the Asia Pacific Region (Whitehead, 2012). Its products are available through over 20,000 retail outlets, including those in its own footfall outlets, e.g. Nike Factory stores (Whitehead, 2012). This study considers the contemporary business surroundings of Nike using a PESTLE approach, paying particular attention to any human resources counselling (HRM) issues that whitethorn arise under each heading. Overall, it is argued here that Nike has attempt to address various business and social challenges by harmonising its economic value proposition to Consumers, shareholders, business partners, employees, and the community. (Ferrell et al. 2009, p.417).Political In the estimation of or so observers, Nike has benefited considerably from the growth-orientated policies of the US government, which has keep low interest rates, currency exchange stability, and internationally competitive tax arrangements (Whitehead, 2012). Nike has also benefited from cooperation with government initiatives in terms of transparency in the global value chain one example of this lies in membership of the Clinton administrations 1997 Apparel Industry Partnership (Wagner, 2009). As will be discussed further below, semi semipolitical pressures have featured more negatively in concerns over Nikes employment practices (Whitehead, 2012).Economic In common with all consumer-facing organisations, Nike faced challenging concern conditions since the financial crises of 2008-9 and contingent economic slowdown this has applied in both Western markets (such as the US) and the Asia-Pacific region (Whitehead, 2012). Conversely, Nike has used its established brand equity to feign advantage of growing consumer demand in emergent economies (Whitehead, 2012). The corollary to this has been anexpansion o f Nikes value chain in which it has also taken advantage of the lower lucre rates paid in those economies (Whitehead, 2012). Nike has defended the contingent CSR critiques by arguing that it has leave behindd employment in otherwise underdeveloped economies, and paid the established local rate for ram (Whitehead, 2012). In HRM terms, this implies a considerable divide between the higher-value strategic and design function retained in the US, and those in outsourced manufacturing (Davies, 2006).Social/Societal In the macro-economic sense, Nike (and its competitors in the sportswear sector) are the beneficiaries of a growing societal preoccupation with health and fitness (Davis, 1992). As Elliot and Percy (2007, p.52) indicate, Brands can also be used to counter some of the threats to the self posed by post-modernity, such as fragmentation, loss of meaning and loss of individuality. However, Nike also faces continuing challengesarising from its CSR (corporate social responsibility) position, chiefly related to the reputation of its global value chain (Foster and Harney, 2005). Nike was caught up in the ongoing debate around globalisation, perceived by many pressure groups to be Increasing the inequalities ofpolitical power and influence, as swell as highlighting new dimensions of inequality (Hurrell and Woods, 1999, p.1). From the 1990s onwards, Nike adopted the standard industry practice of outsourcing much of its skilled, semi-skilled and unskilled manufacturing to emerging economies, including those in the Asia Pacific region (Foster and Harney, 2005). Sweated labour (including that of children) was allegedly being used in a manner that contravened both local and international standards, as well as Nikes stated CSR position (Foster and Harney, 2005). Moreover, the corporations compliance with requirements regarding pay and working conditions was brought under further scrutiny, when it emerged that the relevant workplace and HR records were non being pro perly maintained (Foster and Harney, 2005). In some circumstances, it was suggested that these lapses were achieved with the connivance of local officials (Foster and Harney, 2005). To counter these allegations, Nike began to incorporate greatertransparency in its reporting, providing the locations of specific manufacturing facilities (Carter, 2005). In 1993 it promulgated its Memorandum of Understanding, clarifying its expectations regarding the conduct of suppliers and subcontractors (Hadjikhani et al., 2012). The point here is that Nike has to avoid being caught up in consumer boycotts, especially where these can be globally popularised via the internet as Goul Andersen and Tobiasen (2006, p.205) point out, Within the framework of globalisation, political consumerism takes on a particular significance, sometimes providing the only opportunity to influence outcomes as trans-national companies are outside the regulatory powers of national governments. In HRM terms, these kinds of l apses can also undermine employee confidence in leadership regarding CSR issues (Schwartz et al., 2012).Technology In common with most consumer-facing corporations, Nike has been able to use intensify levels of digital metrics to analyse customer demand and revise its segmentation accordingly (Myerson, 2007). In the optimum model, transaction and supply chain event management are linked via SOAP (Simple Object Access Protocol) and MPPS (Massively Parallel Processor System) systems (Myerson 2007). Meanwhile consumers will be able to make contact-less payments via mobile phone platforms (Myerson, 2007). These processes may however accelerate the speeding-up of the hollowing-out of the workforce, reducing the amount of employment on offer (Davies, 2006).Legal Nikes growth strategies have relied on internationalisation and, correspondingly, the corporation has to adapt apace to the legal and policy frameworks in all of its trading areas (Legendre and Coderre, 2012). Countries with a common law legislative framework (i.e. the United Kingdom and United States tend to opt a less interventionist approach that supports the interests of shareholders. Meanwhile, states which have code-orientated legal systems (e.g. Germany, France and Spain), tend to acknowledge wider stakeholder interests (Legendre and Coderre, 2012). However, Nike has still faced legal difficulties in the course of its international expansion succeeding(a) allegations of sweated labour, it closed some factories in Pakistan and moved its operations to Thailand and China (Grisini and Seppala 2010). However, the contingent unemployment led to difficulties with the Pakistani authorities, as well as criticism over the resulting unemployment (Grisini and Seppala 2010). As the Asia-American Free Labour Institute (AAFLI) has argued, Nikes strategy is to pit six factories against each other and have them compete for orders based on who produces the cheapest shoe. The government doesnt protect the workers, the union is complacent, and Nike looks the other way (Hadjikhani et al., 2012, p.23). In 2003 Nike countered claims that it paid below the marginal wage in countries such as Indonesia, stating that it had paid, on average, Double the minimum wage as defined in countries where its products are produced under contract. History shows that the best way out of povertyis through exports of light manufactured goods that provide the base for more skilled production (Jennings, 2012, p.156). Nike was subsequently sued under Californias Unfair Competition and False Advertising laws, on the basis that its statements were traitorously (Jennings, 2012). Following initial defeat and later appeals to the California Supreme Court, Nike settled privately with the plaintiff, prompting speculation that it had done so to avoid further minus revelations (Jennings, 2012). Again, such crises can undermine the role that CSR has in harmonising the HRM effort across the organisation (Schwartz et al., 2012 ).Environmental In formal terms at least, Nike maintains a decreed position with regard to green (i.e. environmental) issues, with ISO 14000-compliance presented as part of its overall policy (Gallagher and Weinthal, 2012). Launching its initial sustainability policy in the early 1990s, Nike appointed 100 sustainability champions to care pilot projects in various aspects of its business, such as the reduction of carbon emissions and elimination of waste (Holt et al., 2009, p.4). As Willard (2002, p.80) explains, externalised costs, such as those arising from human resources, Must be considered if the markets invisible hand is to reconcile the basic conflict between do decisions based solely on short-term profit and making decisions based on social and environmental responsibility. In HRM terms, the involvement of employees in the operation aspects of environmental policy is calculated to have a ordained effect on both productivity, and the psychological contract of staff (Schwar tz et al., 2012).

A Pair Of Tickets English Literature Essay

A Pair Of Tickets English Literature EssayA Pair of Tickets by Amy Tan explores the relationship of ethnic, identity, heritage and place and setting. According to Oxford dictionary, self-identity is the recognition of ones potential and qualities as an individual especially in relation to well-disposed context. June whitethorn the protagonist in this story, denies herself as a Chinese. She was raised in San Francisco as a Chinese-American. Her acquire grew up in China and immigrated to America whereas June May born in America and grew with American culture. Jane May has not been raised in China and never had been able to relate to the Chinese way of life sentence or matte Chinese. As she sees the relationships and the style of life, she is able to have a look at the way her both parents had been raised and why they thought and snarl different than she did when she was growing. After June Mays mother passes away, June May tries to find her true roots and origin.Initially, Jane Ma y has trouble accepting herself as Chinese despite her Chinese farm animal identity. She did not understand what her mother meant when her mother said once you are born Chinese, you cannot help unless live and look at Chinese It is in your blood, waiting to be let go (Tan 218).She often felt abashed by her mothers behavior. June May was born in America and goes to American school. She starts to claim herself as a part of American by making friends with Caucasian. As educated under American culture, she thinks in an American way. Therefore, she wants to be more associated with her Caucasian friends. Ethnic minority members have actually learned and acquired Western values and patterns in their behavior. The ways in which people express their emotions and interpret the facial expressions and bodily gestures of others are instances of much(prenominal) psychological features (Fong 265).She denies her Chinese identity as she does not want to be an outsider in a foreign country and wants to be more associated with Americans in Americans way. She does not want to follow her mother by beingness Chinese as it embarrassed her by haggling with store owners, pecking her mouth with a toothpick in public, being colour blind to the fact that lemon yellow and pale pink are not good combination for winter clothes(Tan 218). She feel embarrassed by doing so in public as people will look down at her and does not want to be stereotyped by Americans. She does not admit herself as Chinese. Since June May is primarily ignorant of Chinese culture, she assumes that the stereotypical behaviors that her mother sometimes expressed are representative of what it means by being a Chinese.June May begins to accept the reality of her being a Chinese when she travelled to China with her father. At China she start to realize how her mothers outgoing influenced her present life. She also realizes that her family history is in China. The story begins when June May enters Shenzhen, China a nd she starts to feel her cultural identity changing, I feel different. I can feel the skin on my forehead tingling, my blood rushing through a new course, my bones aching with familiar old pain. And I think, my mother was right. I am becoming Chinese (Tan 217). Upon arrival, she becomes nervous and try to assimilate there is a conflict because her thoughts seem to go backbone and forth between being Chinese and continually questioning heritage. She begins to realize her mother was right because her mother was reflecting how much her family had to go through and leaving her life in China to go to America. According to Harold Bloom who cites Ben Xu wrote She once associated with being a Chinese, when she was unable to understand what her mother said that a person born Chinese cannot help but feel and think Chinese(Bloom 55).Jing mei begins to understand the other side of her mother, and the strength of her soul on the way to Guangzhou... their mother-their mother was coming, whereas my mother was dead.(Tan 220).Jane May even axiom her father crying as he has so much history in China. She was surprised with her fathers reaction as she understands what does family attachment means. This view is evident in line And I cant help myself. I also have misty eyes, as if I had seen this a long time ago (Tan 218). She felt the difference once she entered the city because she realized she did not accept herself as a Chinese. She realized that she did not embrace her culture when she was growing up as she told herself at the age of fifteen that she was American.Once Jane May and her father disembark from the train, they must wait in the line to be processed through customs. That ensuant reminds Jane May of her waiting for a bus in San Francisco. She remarks I am in China, I remind myself (Tan 222). This shows that she still reaching back for a nose out of familiarity. She has not reached the place where she has fully embraced her roots. She questions herself whether the customs officers will believe that her passport is truly hers as she is heavily make up in the picture. For that day, she is without make up and perhaps they will think she is a true Chinese and it is a forged passport. I wonder if the customs people will question whether Im the aforesaid(prenominal) person in the passport photo. In this picture, my chin length is swept back and artfully styled. I am wearing false eyelashes, eye shadow, and flange liner (Tan 222). As quickly that thought comes to mind, Jane May dismisses it because she rationalizes, within her own mind, that her height is much taller than most Chinese women. I stand five-foot-six, and my head pokes above the crowd so that I am eye level only with other tourists (Tan 222). She is complicated with her past and her current life. It is clearly shown when Jane May was completely westernized end-to-end her life in America and Jane Mays mother did her best to instill in her the identity of a Chinese. Jane May only a f ew minutes by and by introduce herself to her family by her Chinese name, Jing Mei although her passport reveals her American name of June May. This marks the beginning of her acceptance of her true identity as a Chinese woman. She still struggles to accept all these strange encounters.There is another indication of Jing Meis American upbringing and her lack of being current on Chinese modernisation and culture when she visits the hotel. The taxi stops and I assume weve arrived, but then I peer out at what looks like a grander version of the Hyatt Regency. This is commie China?(Tan 226). She exclaims Americans culture tends to instill in its citizens a mindset about other cultures particularly those to which are antagonistic and Jing Mei is the example of how we sometimes think we are the only ones who have certain things or certain experiences. When she sees things are very similar, she begins to accept all the things that represent Chinese culture. Strangely enough, she begins to envision her firstly Chinese meal of a big banquet with one of those soups steaming out of a carved winter melon, chicken wrapped in clay, pecking duck, the works. save it is ironically hamburgers, French fries and apple pie, the stereotypical American dinner ( Tan 227).Jing Mei discovered herself more when her father shares a time of national story telling about Suyuans (Jing Meis mother) heartbreaking journey from China to America during Japanese invasion and how her mother was forced to leave behind her twin daughters back at China due to her sickness and also starvation. Finally, Jing Mei discovered the meaning of her mothers name, Suyuan which means long cherished love. After Jing Mei gradually understands her mother and about her sisters, she gains respect towards her mother as she learns the battle her mother has fought to get to America and she slowly realizes how important it is for herself to meet her half sisters, Chwun Yu and Chwun Hwa. When Jing Mei arrived at Shang hai, Jing Mei met her twin sisters. It is cherished wish that her mother dreamt of Jing Mei eventually meets up with her half sisters and realizes that they all resemble their mother.

Nanobots The New Nemesis Of Cancer Biology Essay

Nanobots The New Nemesis Of cancer Biology EssayThe term nano technology allow be one which would be widely use in the near future. It is in the leading position in comparison to futuristic nanotechnologies e.g., surgical nanomachines in hurt of extensive research, application and products in pipeline. Nanotechnology is popularly known as the science of small or scientifically foot be described as the technology to develop materials and structures of the size range from 1 to 100 nanometres. It will ease up tremendous applications in the line of business of medicine especially for cancer discreetnessmentOncologists, physicians who study, diagnose, and transact cancerous tumours, of every nook and corner of the world has been relentlessly researching for method actings for the early detection of cancer and precious localization of cancer therapeutics with minimal adverse cause to healthy tissues. Research in nanotechnology has shown promising possibilities for achieving this goalChemotherapy is one of the most common cancer discourses used. It is a process that makes use of cytotoxic chemicals to exterminate cancerous cells. The chemicals may each be injected or taken orally. Chemotherapy may to a fault be administered by rubbing it on the patient ofs body.But chemotherapy actually is a jolting form of cancer treatment that kills not only the target malignant cancerous cells, but alike many good non-target tissues as well. In or so cases it has been guessed that chemotherapy does more than harm than good.The patients even if they recover from the cancer disease and avoid death through chemotherapy, they still will be affected by the approximate side effects of it. Some of those side effects may be more harmful and painful than the cancer they had before. But equally effective remedies take a shit not yet been found.Nanobots atomic number 18 expected to change that. It will provide better ways which makes the treatment safer. By joining mul tidisciplinary engineering inventions in nanotechnology, an hazard for development of enhanced, miniaturized and low represent diagnostic/imaging instruments and treatment machines has opened. The future possibility of tackling pain- the bitter side of cancer therapy, through nanotechnology would be considered one of the biggest breakthroughs.How atomic number 18 nanobots made and what atomic number 18 they made offDevelopment of nanobots is a rather complicated process. Scientists fetch made significant progress in this field, but have not deployed a nanobot which is entirely mechanical. Most of the developed nanobots at enter are partly or mostly biological in nature. Nanobots are suitable machine adaption of bacteria. They are designed in such manner so that they can function on the same way as that of twain bacteria and common viruses in order to interact with and repel them from the human system. The best way to create a nanobot is to use another nanobot. But the puzz le lies in getting started.An ideal material for the construction of nanobots has not yet been found. But expert scientists believe that silicon may be that ideal material, because of its conventional use for delicate electronic contrivances. Microscopic silicon components called transducers have so far been successfully built into nanobot legs. Selection of an ideal fuel for its working is also a problem faced by the scientists since most of the commonly used fuel units like solar cell or batteries cannot be shrunk to nanoscale. However, atomic technology may provide answer for this. Researchers consider of equipping a thin sheet of radioactive material as fuel. As the radioactive atoms decay and clit energy the nanobot would be able to utilise this power source. other nice side effect of this system is its ability to renew automatically. With the constant circulating nuclear energy it would supply, this fuel cell would never need to be replaced. Another method to power up the nanobot is using the patients own body. Nanobots acquire power outright from the bloodstream. A nanobot attached with electrodes can form a battery using the electrolytes found in the blood or the nanobot could contain more or less chemicals that would perform some chemical reactions with blood to produce energy.Structure and working of nanobotsNanobots are very small that they can easily enter the body and flow along the bloodstream. The outside(prenominal) of the nanobots are constructed similar to the carbon atom structure in a diamond due to its inert properties and strength. It has super-smooth surfaces which lessens the triggering of the bodys immune system, allowing its movement inside the body unmoved. The glucose or sugars present inside the body may cause hindrance for its motion, and hence, the nanobots will have other biochemical or molecular parts forecasting on its tasks. at that place are few items that might be found in a nanobots toolkit. Those areMedicine c avity It is a hollow section inside the nanobot that hold small doses of chemicals or medicine and could release the medication directly to the site of infection or injury. Nanobots can also store the chemicals used in chemotherapy to treat cancer and can delight it directly to the site. Although the amount of medication is comparatively very low, nanobots can apply it directly to the cancerous tissues more effectively than traditional chemotherapy, which depends on the bodys circulatory system to carry the chemicals throughout the patients body killing the cancerous cells and the same time affecting the other healthy cells of the body harmfully.Probes, knives and chisels It is used to send off blockages and plaque. Nanobot need some device to grab, break go through and remove these abnormalities. They may also need some devices to crush clots into very small pieces. If a partial clot gets released and enters the bloodstream, it can cause more problems gain down the circulato ry system.Microwave emitters and ultrasonic signal generators It is used to destroy cancerous cells. The doctors depend on methods that will kill a cell without bursting it. A busted cancerous cell may release chemicals that could cause the cancer to mobilize further to other portions of the body. Nanobots can break the chemical bonds in the cancerous cell and kill it without breaking the cell wall using fine-tuned microwaves or ultrasonic signals. At the same time, the robot could emit microwaves or ultrasonic signals in order to heat the cancerous cells and destroy it.Electrodes Two electrodes extended from the nanobots generate electric up-to-the-minute and heat the cell until it dies, thereby killing cancerous cells.Lasers By vaporising tissues, small and powerful lasers could remove harmful materials like plaque in arteries, cancerous cells or blood clots.Scientists are working hard to find a suitable design for the body of the nanobot. It must be fast, aerodynamic and smo oth to flow freely along the body and to complete its function. Some believe that a spider-like body would work best, but many nanobot researchers also think that a smaller version of the centipede might be best. They hope that by equipping the nanobot with several sets of fast-moving legs and keeping its body low to the ground, they can create a quick, efficient machine that would also be suitably shaped for introduction into human blood vessels to perform its functions.Nanobots will possess at least the fundamental two-way communication, respond to phone signals and will be able to receive power or re-programming instructions from an external source via sound waves. A network of special stationary nanobots will be positioned throughout the body. These nanobots logs into each active nanobots as it passes and will report results, allowing the interface to keep track of all the nanobots present in the body. Using this, a doctor can not only monitor the patients progress but also can change the instructions for the nanobots to enter into another stage of the healing. When the tasks are completed, it can be flushed out from the body.Nanobots can be programmed to perform diverse jobs around the body, and one of them will be to locate and destroy cancerous cells. There will be different nanobots to do different jobs to suffice kill the cancer, for example, one will inject toxins, while the other cuts out the tumour carefully without damaging healthy cells around it. Another robot will be able to send video footage of this happening to the surgeon treating the patient.Advantages of the technologyThe different advantages of the usage of nanobots areA better method for cancer detectionThe most commonly used cancer detection techniques like optical credit of malignant changes, cell growth analysis, specific-ligand receptor labelling or genetic test are inaccurate, lengthy and complicated process, which is impractical for clinical use.The detection of cancerous cell s using nanobots will be simpler and precise than the traditional methods. Nanobots covered with organic-based fluorescent dyes will be bound to the cancerous cells which makes optical detection easier.A better method for cancer treatmentThe popular treatments of cancer at present, like chemotherapy, have many pugnacious side effects even though it helps in the treatment of cancer. It kills healthy cells present in the body along with the cancerous cells and may cause some side effects or even a more painful disease than cancer in the future. They will not be able to live a normal life even after find from it.Nanobots on the other hand, carry the drugs or tools used to destroy cancer tissues directly to it. It will disperse the drugs directly to the cancerous cells which leave the healthy cells unaffected thus preventing further side effects to a great extent.Some achievements in nanoboticsResearchers at the cole Polytechnique de Montral, in Canada have created a microscopic devic e that could offer a new and very effective treatment for cancer. The research team has coupled live bacteria to microscopic polymer beads which can carry cancer-killings drugs to create nanobots. The bacterias small size and flagella helps them to fit in and flow through the smallest blood vessels in the human body.A research team of a Californian institute-Pasadena, injected nanobots into a patients bloodstream. It was able to enter into the cancer tumour, deliver double-stranded small interfering RNAs (siRNAs), and turn off cancer genes.Reasons that slow down the use of nanobots at presentScientists do face challenges and are concerned of making nanobot tools effective and safe. For instance, creating a very small laser powerful enough to destroy cancerous cells is a great challenge, but its more difficult to design it so that the nanobot doesnt harm the healthy tissues surrounding the cancerous cells. Even though many scientific teams have developed nanobots that are small enoug h to enter into the bloodstream, its only the tip of the iceberg. They have to do more experiments and researches to make nanobots a real medical application.Another problem is with the quantity of toxin which goes into each capsule. This is because too much of the toxin at any one point can damage the body, therefore the process has to be spread out over a longer period of time, using lots of small doses.Nanobot consist of a transporting mechanism, an internal processor and a fuel unit. Creating a fuel unit at nano-scale is very difficult with current technology.Another problem in constructing nanobot is selection of material out of which it is made of and breaking it down small enough. The properties or behaviour of metals at large-scale and nano-scale might be different.Another factor that slows down its entry to the medical field is the high cost for the research, development and experiments.Some other applications of nanobots in the field of medicineApplications of nanobots in the field of medicine are practically unlimited. Some of the applications areTreating arteriosclerosis induration of the arteries refers to an abnormality where plaque builds up along the walls of arteries, thereby hindering the normal flow of blood through it. Nanorobots can treat this condition by physically chipping away the plaque along artery walls which would then enter the bloodstream and gets removed from the body.Breaking up blood clots Nanorobots could travel to blood clots which can cause complications ranging from muscle death to a stroke and break it up. This application can be one of the most dangerous uses of nanorobots, if the robot could not remove the blockage without losing even small pieces into the bloodstream. Small pieces, if entered into the bloodstream could then travel elsewhere into the body and cause more severe problems. The size of the robot also must be small enough so that it doesnt block the flow of blood itself through the arteries.Fighting cancer Doctors are hopeful to use nanorobots either to attack tumours directly using lasers, microwaves or ultrasonic signals or as a part of a chemotherapy treatment, wherein medication can be delivered directly to the cancer site to treat the patient. According to doctors by delivering small but precise doses of medication to the patient, the side effects of the medicine will be minimized without a bit of loss in the effectiveness of the same.AIDS treatment It can act as synthetic immune system of the AIDS affected patient which would help him to survive the disease. It could function as replacement helper-T cells in a weakened immune systemHelping the body clot Another item kind of nanorobots named clottocyte is an artificial platelet, which carries a small mesh that dissolves into a sticky membrane upon contact with blood plasma. Robert A. Freitas, Jr., the scientist who designed the clottocyte, claims that clotting done by clottocyte could be up to 1,000 times faster than the natural clotting mechanism of the body. Doctors can use clottocytes to treat haemophiliacs or patients with serious open wounds also.Parasite Removal several(prenominal) nanorobots working together could directly release drugs on bacteria and small parasitic organisms inside a patients body and kill them all.Gout One of the major functions of the kidney is to remove waste from the breakdown of fats from the bloodstream. The inability of kidney to perform this task develops the condition called Gout which causes waste to crystallize at points near joints like the knees and ankles. A nanorobot, though wouldnt be able to reverse the condition permanently, could break up the crystalline structures at the joints and provide relief from the intense pain at the joints, as a result of gout.Breaking up kidney stones Kidney stones vary in size and are intensively painful to get removed normally as the size increases. though doctors can break up comparatively large kidney stones using ultrasonic fre quencies to get it removed normally, it is not always effective. A nanorobot could break up these stones using a small laser as well as can carry small ultrasonic signal generators to deliver frequencies directly to the kidney stones.Cleaning wounds Nanorobots could help to remove dead remains from wounds and thereby decreasing the chances of infection. They can be used very effectively in cases of puncture wounds, where conventional methods of treatment are difficult.ConclusionNanotechnology has become an emerging tool which helps to find solutions for several questions of different fields. It has provided the hope from preparing cure for many incurable and deadly diseases of the present. But still more researches and improvements are required, before actually applying it.The investments and resources required for the research, development and performance trials for nanobots are considerably large. Hence the sponsoring agencies, both private and government, should provide more inve stments and resources which make these nanotechnology inventions (like nanobots) more cost-effective and easily available for patients all across the world and of all economic classes. It will open a new horizon in the field of medicine especially for the study and treatment of cancer.Health departments in association with governments should form policies that support the usage of nanomaterials and prevent the use of treatments which are harmful and has harsh side effects, like chemotherapy, for cancer.The future holds lot of promises as nanotechnology has the potential to provide cancer therapy by challenging the problems like high treatment costs and unwanted side-effects.GlossaryTherapeutics The branch that deals specifically with the treatment of disease and the art and science of healingDiagnosis Indicating the nature of a diseaseNanoparticle A particle of something with dimensions in the nanometre rangeAerodynamics The science which treats of the air and other gaseous bodies u nder the action of force, and of their mechanical effectsHaemophilia A tendency to unrestrained bleedingReferencesRose SC, Hassanein TI, Bouvet M, Hart ME, Khanna A, Saville MW. Delivery of radiofrequency ablation probes to the targeted liver malignancy Using all the players on the field. J Vasc Int Radiol 2002vol13pg1060-1.http//electronics.howstuffworks.com/nanorobot.htm/printable 16.9.2010http//www.seminarprojects.com/Thread-nanorobotics-full-report15.9.2010http//www.bioline.org.br/request?cr0604514.9.2010http//nanogloss.com/nanobots/what-nanobots-are-made-out-of/ 16.9.2010http//nanogloss.com/nanobots/how-nanorobots-are-made/ 16.9.2010http//nanogloss.com/nanobots/what-are-the-capabilities-of-nanobots/16.9.2010Varadan VK, Harbaugh R, Abraham JK. Deep-brain stimulator and-control of Parkinsons disease. Congrs Smart electronics, MEMS, bioMEMS and nanotechnology. San Diego CA 2004. Available from http//www.smartpillcorp.com..http//www.cancerjournal.net/article.asp?issn=0973-1482year =2006volume=2issue=4spage=186epage=195aulast=Hederef2.www.nanoscience.cam.ac.uk/schools/articles/cancerarticle.pdf.16.9.2010Sinani VA, Koktysh DS, Yun BG, Matts RL, Pappas TC, Motamedi M, et al . Collagen coating promotes biocompatibility of semiconductor nanoparticles in stratified LBL films. Nano Lett 200331177-82Sprintz M, Benedetti C, Ferrari M. employ nanotechnology for the management of breakthrough cancer pain. Minerva Anestesiol 200571419-23.Martel S, Hunter I. Nanofactories based on a fleet of scientific instruments configured as miniature autonomous robots. proceedings of the 3rd International Workshop on Microfactories USA 2002. p. 97-100Konig K, Riemann I, Fischer P, Halbhuber KJ. Intracellular nanosurgery with near infrared femtosecond laser pulses. Cell Mol Biol (Noisy-le-grand) 199945195-201Carlier J, Arscott S, Thomy V, Camart JC, Cren-Olive C, Le Gac S. Integrated microfabricated systems including a purification module and an on-chip nano electrospray ionization i nterface for biological analysis. J Chromatogr A 20051071213-22.Developments on Nanorobots with System on Chip May Advance Cancer Diagnosis, Cancer Treatment, Health Care News Articles, eMaxHealth, October 2006

The Benefits of Extracurricular Activities for Students Essays -- Educ

It is important for adolescents to participate in adulterous activities. Student who participate in these activities improve their academic heaps and social life. Extracurricular activities can also help reduce many peer pressure related problems. They enrich the lives of the students, their families and our communities. These activities create well rounded children who visit what their interests and talents ar because they have been exposed to such opportunities (Extracurricular Activities, Blogadmin). For most adolescents extracurricular activities should be required among what they do outside of school.What are extracurricular activities? Extracurricular activities are those sponsored by and usually held at school but are not part of the academic curriculum. There are usually many extracurricular activities available including group sports, such as soccer, baseball, basketball, and volleyball, and academic interests such as foreign language club, debate team, chess club, st udent government, student publications, 4-H Club, environmental clubs, choir, band, photography, politics, and business (Wells). There are activities for everybody so encourage adolescents to go try something, and they might turn up liking it.To get involved in these activities schools usually have a listen of multiple activities that a student can be in (Dowshen). There might be a certain age that is required to be in activity, but there are endless amounts of things that adolescents can do (Dowshen). Money is one of the other big problems most kids think of when they want to go into an extracurricular activity. Most of the money that will need for the activity can be cut down by fundraising. If the money cant be make by fundraising, sch... ...involved_school.html.Hollrah, Rachel. Extracurricular Activities. 20 October 2014. .Levack, Nicholas A. Can extracurricular activities help your child resist peer pressure? Helium. 25 October 2014. .Needlman, Robert M.D. Extracurricular Act ivities. 26 August 2004. 25 October 2014. .Smith, Allison. Extracurricular Activities. University of Michigan. 25 October 2014. .Wells, Ken R. Extracurricular activity. Answers.com. 27 November 2004. Answer Corporation. 07 November 2014..

crusades Essay -- essays research papers fc

Crusading, much like Imperialism in the 20th century, was all about expansion. During the middle ages however, it was more than about the expansion of religion rather then power, or at least thats the way it was preached. Crusading by definition is a holy war authorized by the pope, who proclaimed it in the name of god of Christ. It was believed to be Christs own enterprise, legitimized by his personal mandatary (1). This essay examines the background of the crusades to offer a better understanding as to why they occurred. It also examines the effects that the crusades had on the man. It is easy to look at the crusades as a violent meaningless act, but one must understand the type of setting this movement occurred during. This was a time when if you took part in the crusades, you were seen as a warrior of god, recruited by the pope. Any man who fought in the name of god would be rewarded in heaven. Popular belief in the 10th and 11th centuries was that the more you did for god, the less accountable you were for youre past sins. The more deeds you did, the better your credit in the Treasury of God (2). The Treasury of God is a summarization of the good deed outweighing the bad deed principle of the time. Acts of violence in the name of god are far less common in the world today. But, as seen with September 11th, jihad or holy war is still occurring. This essay gives a basic timeline and underlying principles behind the crusading missions. Justification for these acts remains unreadable and is simply opinion based.To understand the effects of crusading one must be familiar with the background in which it took place. The major conflict that initiated the crusading endeavors occurred when the Seljuk Turks aggressively took Syria and Palestine. Turkish Muslims also invaded the Byzantine Empire and subjected all classes of people to their rule, even Christians. At the same time, Popes of the 11th century were trying to extend their religious power beyond its or iginal borders. They did this by forcing religion upon certain groups such as heretics, pagans, and most all non-Christians. When Pope Urban seen the action of the Muslims he then thought it was his business to Christianize those people. These facts combined started the First crusade in 1095 (3). At a personal level however, crusading could be unde... ...land Toronto Longman 2002), 175.9. Nicholson, 134.10.Phillips, 347.11. Jonathan Phillips, The Fourth Crusade and the Sack of Constantinople (London Jonathan Cape, 2004), 202. 12. Nicholson, 120. 13. Nicholson, 147.14. Yvonne, Friedman, Encounter amidst Enemies captivity and Ransom in the Latin Kingdom of Jerusalem (Leiden Boston Brill, 2002), 340. 15. Nicholson, 166. BibliographyAsbridge, Thomas. The First Crusade A New History New York Toronto Oxford University Press, 2004.Friedman, Yvonne. Encounter amongst Enemies captivity and Ransom in the Latin Kingdom of Jerusalem. Leiden Boston Brill, 2002. Nicholson, Helen. The Crusades . Westport, Conn Greenwood Press, 2004.Phillips, Jonathan. The Crusades 1095-1197. Harlow, England Toronto Longman 2002.Phillips, Jonathan. The Fourth Crusade and the Sack of Constantinople. London Jonathan Cape, 2004.Slack, Corliss. A Historical dictionary of the Crusades. Lanham, Md Scarecrow Press, 2003.