Material Science Essay Example for Free

Material Science Essay Abstract In this assignment I will be defining the 3 essential properties of every material and describing those. I would also be describing how silicon-based semiconductors revolutionized computing. I will also define what microchips are and how they relate to integrate circuits. Since the pressing questions about the increasing ability of computers to quickly process large amounts of information is whether a computer can be built that is considered â€Å"alive† or â€Å"conscious.† I will also be defining artificial intelligence and telling the difference between the human brain and the central processing unit of a computer. Material Science There are three essential properties of every material that scientists use as a foundation for most every study. First it is the kind of atoms that is made up from the material. There are the neutral elements and the compound elements. The neutral elements would have the identical amount of protons and electrons; this would essentially terminate one another, which would leave the protons and electrons neutral. The compound element is when there is a combination of more than one element. The atoms are second in the way that they are arranged. A great way to explain this is by relating atoms of liquid and atoms of solids. For example the atoms of liquids move around allowing the atoms of solids which are packed together. The way that atoms are attached together is number three. These are the key properties when understanding the study of materials. The strong point of the material, this is the capability to endure forces being useful to it without breaking, this is first. The materials elasticity is second, which is the capability to flex while returning to its original form. Number three is the materials plasticity; this is the ability to change its shape forever. Thanks to the starter of semiconductors, computers have developed over a billion times faster than one of the first built in 1946 (ENIAC). Describe how silicon-based semiconductors revolutionized computing. Since silicone semiconductors are capable to move easily through the solid component it is more proficient than copper based conductors. Silicone based conductor’s makes holes which produces and fills a space constantly. This means electrons jump from one atom to another. This will also change the silicon through a process called doping by adding either phosphorus or aluminum the desired effect is achieved. When adding phosphorus to silicon it develops n-type which is negative-semiconductor. When adding aluminum to silicone it develops p-type semiconductors. These are both essential parts functions efficient electrical devices microchips, which are used in computers. Microchips are positive and negative type semiconductors. Microchips do a detailed function. A microchip is individual diodes and transistors will play a big part of the essential function in modern electronics, although these strategies have been mainly replaced by much more complex arrays of P- and N- kind semiconductors, known as microchips. Microchips may join hundreds or thousands of transistors in one integrated circuit, particularly intended to do a specific role. They are related to integrated circuits this is why. Combined circuits (microchips) are the main component in devices such as microwave calculators, and other devices. An integrated circuit microprocessor lies on modern technology. Modern technology is occupied with electrical integrated circuits. Such as, Televisions, MP3 players and computers all contain integrated circuit which allows them to perform specific functions. Also known as microchips or microprocessors, these circuits keep track of all the information being transferred within the device, in essence giving it life. Jack Kilby and Robert Noyce are both who take credit with inventing the integrated circuit, both coming up with the idea within a year of each other while working for separate companies. Artificial Intelligence is a division of science which deals with helping machines and finds explanations to complex problems in a more human like manner. This normally contains borrowing features from human intelligence, and applying them as procedures in a computer friendly way. A more or less well-organized approach can be taken depending on the necessities recognized, which impacts how artificial the intelligent performance seems. (http://ai-depot.com/Intro.html) The 2 essential differences between human brains and the central processing unit of a computer is the brain-computer metaphor has served intellectual psychology well, research in intellectual neuroscience has revealed many significant changes between brains and computers. Escalating these differences may be crucial to understanding the mechanisms of neural information processing, and eventually for the creation of artificial intelligence. (http://scienceblogs.com/developingintelligence/2007/03/27/why-the-brain-is-not-like-a-co/) One difference is that brains are analogue and computers are digital. For instance one of the primary devices of information communication appears to be the amount at which neurons fire a fundamentally unbroken variable. Likewise, networks of neurons can fire in relative synchrony or in relative confusion; the coherence affects the strength of the signals received by downstream neurons. Lastly, inside each and every neuron is a leaky integrator circuit, composed of a diversity of ion channels and endlessly changing membrane potentials. (http://scienceblogs.com/developingintelligence/2007/03/27/why-the-brain-is-not-like-a-co/) Another difference is short-term memory is not like RAM. While the superficial similarities between RAM and short-term memory encouraged many early intellectual psychologists, a closer examination reveals strikingly important differences. Although RAM and short-term memory both seem to required power, short-term seems to hold only to long-term memory however. RAM holds data that is Isomorphic which is having similar appearance but different ancestry. Not like RAM, the capacity limit of short-term memory is not fixed, the capacity of short-term memory seems to vary with differences in processing speed as well as with expertise and understanding. (http://scienceblogs.com/developingintelligence/2007/03/27/why-the-brain-is-not-like-a-co/)

Understanding ADD and ADHD Essay -- Attention Deficit Hyperactivity Di

Understanding ADD and ADHD First, it is important to understand ADD and ADHD and how they can be identified. Within the classroom, a teacher may encounter a student who constantly squirms in their seat, stares out the window, and has a desk that is a complete mess. These are not poor students who do not care about school and learning. Often these students may be undiagnosed cases of Attention Deficit Disorder or Attention Deficit Hyperactivity Disorder. These students can often be disruptive to themselves and the students around them, which causes serious educational problems. For this reason it is important for these students to be identified and to have their condition treated. Also, if untreated for a long period of time, the student?s self esteem and feeling of competence may be severely damaged (D?Alonzo, 1996). Untreated cases of attention disorders can be spotted through certain symptoms. These symptoms include short attention span, daydreaming, low frustration tolerance, poor planning ability, disorganization, constantly displaying inappropriate behavior, and a multitude of others (Copeland & Love, 1992). If a teacher encounters a student in their classroom and feel that he or she may have an attention disorder, there are certain steps one should follow to initiate effective and appropriate treatment of the student. First, one should take time to organize a list of behaviors and problems of the student that cause concern. Next one should gather information about the student?s behavior by observing them. These observations should be recorded and kept for future reference. Then gather information on the student including previous test scores, medical reports, past teacher?s remarks, and so on. After this... ...ers and how to manage them in the classroom. Dowdy, C., Patton, J., Smith, T., & Polloway, E. (1998). Attention-Deficit/Hyperactivity Disorder in the classroom. Austin, Texas: PRO-ED, Inc. This book covers a multitude of areas addressing ADD and ADHD, including but not limited to managing the classroom, accommodating instructional needs, and student-regulated strategies. Slavin, R. (2000). Educational Psychology: theory and practice. Needham Heights, MA: Allyn & Bacon. This book is an educational psychology textbook. I found a section on ADD and ADHD that provided information on the problems the child faces and it also addressed the role of the teacher with ADD or ADHD students. Online Medical Dictionary, (1998). Retrieved from the World Wide Web on September 20, 2014. This source is an online dictionary of medical terms and conditions.

Strengthening Federal Clean Air Standards

For Californians, not a day goes by without hearing some remark referring to smog or the quality of the air they breathe. One becomes accustom to shrugging such remarks off without a second thought after a while. Sure the air is getting cleaner, manufactures and people alike seem to be doing all they can do to clean up the air they breathe. Clean air folks are starting to be labeled as reactionaries. As with every organized group there are those among them that deserve such labels, but when it comes down to the air which people have to breathe very day, extra emphasis is a good thing. Federal and local regulations along with public support are responsible for substantial gains in air quality in the last ten years. â€Å"Air quality in Southern California continues to improve, with 1995 registering some of the lowest levels in decades. Yet Southern California still experiences the worst air quality in the nation requiring continued diligence to meet air quality standards† These improvements provide the grounds for continuing the battle for air quality instead of grounds for a pat on the back and job well done. Federal clean air standards should be strengthened. The Environmental Protection Agency (EPA) along with an arsenal of reputable agencies have drafted a plan known as the 1997 Air Quality Management Plan (AQMP) in which detailed summaries regarding current and future air quality measures are brought forward for critics and supporters alike to discern. It is in this plan along with supporting facts regarding beneficial economic gains and support from the medical community that make the case for continuous and stricter air quality standards. The 1997 AQMP sets fourth the guidelines in which the Federal government should set standards for state and local governments along with private agencies to impose and enforce. The focus of the plan comes as a result of new understanding regarding pollutants known as ozone and M10. This new information flows from countless scientific studies. For example, â€Å"Use of the most current air quality information (1995), including special particulate matter data from the PM10 Technical Enhancement Program† . There findings show direct links in ozone and the PM10 pollutants. In chapter three of the plan one can find the scientific data based on base year emission levels dating back to 1987 as they relate to current and future emission levels. Data clearly show's improvement in Southern California's quality of air in the ten year period between 1987 and 1997. The data also provides needed understanding of the major contributors to smog and other ozone depleting pollutants. Overall, total mobile source emissions account for 61 percent of the VOC and 88 percent of the Nox emissions for these two pollutants† The knowledge of this information has been a major factor in the control of these pollutants produced by the vehicles driven by millions everyday weather on the job or just tooling around town with the top down. While the information in this plan requires a good deal of scientific knowledge to understand the general message is clear. Populations are increasing which increases the demands placed on the environment. Without continual improvement regarding air quality there will be massive amounts of ozone depleting emissions created and unchecked in the environment. This plan should be imposed by the Federal government. It provides the method for promising futures not only for the environment but the economy as well. Along with the benefits in improved air quality that will result form the implementation of the 1997 AQMP substantial gains in technology will be achieved in the areas of zero emission vehicles and the development of alternative fuels. On-road motor vehicles which include passenger cars, light duty trucks, medium duty vehicles, heavy duty vehicles, and motorcycles, currently number approximately 10 million in the South Coast Air Basin. † If this seems an alarming number of vehicles of which contribute 61 percent of the VOC and 88 percent of the Nox emissions in the air; you better sit down. â€Å"In 1995 these vehicles traveled more than 300 million miles per day, and by the year 2010, vehicle miles traveled is projected to be about 380 million miles per day† . This is an alarming number of vehicles along with an alarming number of miles to boot. The implementation of the 1997 plan will require the sale of zero-emission vehicles beginning in 2003. This demand places immense pressure on the automotive industry to come up with suitable alternatives for the combustion engine. The technology gains from this industrial effort have already begun to show themselves at car shows throughout the country. All manufactures will benefit from this new technology, from those who produce the batteries that run them to manufacturers of the lightweight materials needed to produce such automobiles. The public reaps immediate gains from this technology such as the cell phone's carried by thousands of people every day in Southern California. Some of the most notable technologies include nickel metal-hydride, lithium-ion, and sodium-nickel chloride. Nickel metal-hydride batteries are responsible for the ability to constantly charge ones cell phone battery without it developing a memory position resulting in limited to no use of the battery at all. Lithium-ion batteries provide extended use of many battery operated items used in every day life such as flash lights, cameras, radios†¦ Honda and Toyota have announced they will introduce pilot fleets of electric vehicles with nickel metal-hydride batteries in 1988 . The examples in technological advancements that result from stricter air quality controls are endless and cannot be fully realized without implementation of the controls described in the 1997 AQMP. As if the available information thus far were not enough to support the EPA's plans for air quality, the medical community has stepped forward to support efforts for cleaner air as well. The proposed plan clearly benefits air quality and the economy through advances in technology. Support from the medical community will convince the stragglers that don't feel air quality and technology will directly benefit themselves. â€Å"Dr. Barry S. Levy, American Public Health Association president and an environmental health physician, called today for the adoption of EPA's proposed regulations to lower levels of particulate (soot) matter and ozone (a chemical that helps cause smog) in the air. This effort will protect children and adults from illness, disability and death, and reduce health care costs by billions of dollars† . Public health is of major concern when it comes to the environment. The air people breath daily is vital to their existence and the quality of that air is one of the major factors to their quality of life. According to DR. Levy, â€Å"The proposed EPA standard are based on well-designed scientific studies that link adverse health effect to the fine particulate matter and ozone† . The American Public Health Association (APA) is considered on of the oldest and largest organizations devoted to public health. The APA credits itself with some of the top professionals in the field of public health. They have conducted more studies and published more information regarding public health than any other organization of its kind in the world so when they support the EPA's findings for stricter air quality control measures they speak for a vast majority of health professionals. Common sense requires one to feel a sense of dread at the possibility of death as a result of poor air quality. The EPA has built a sound case for enacting stricter air qualities and they have a great plan for its enactment. It is clearer now that the adoption of the 1997 AQMP has far reaching benefits for all. Scientifically sound evidence points to the reality of cleaner air from the plans enactment. Increases in technology will create economic growth and business opportunity. And finally health risks resulting from poor air quality can be substantially reduced for both children and adults. The 1997 AQMP also provides measures for meeting the standards proposed in its regulations. Through, â€Å"Intercredit Trading Program, Air Quality Investment Program and Promotion of Catalyst-Surface Coating Technology Programs for Air Conditioning Units. These measures are designed to enhance compliance flexibility, to facilitate the implementation of the command and control measures† . The command and control measures of the plan are simply implementation and enforcement policies which incorporate assistance and rewards for complying to regulations. Most of these programs are already successfully being operated at the present time. There is also an Air Quality Assistance Fund which has been enacted to help small businesses comply with stricter emission regulations. The plan provides a â€Å"loan guarantee for up to 90 percent of the loan amount, ranging from a minimum of $15,000 to a maximum of $250,000† . Money can be used for retrofitting operations to the point of complying with any portion of the AQMP. A study conducted buy Dr. Steven Meyer, director of the Massachusetts Institute of Technology's Project on Environmental Politics and Policy says, â€Å"‘Job growth–not job loss– is associated with stronger environmental policies. The 10 states with the strongest environmental policies appear to have experienced annual employment growth rates almost . 6 percent higher than those of the 10 states with the weakest environmental policies'†. Opponents of Federal regulations often rely on job scare tactics to kill a useful initiative such as the one proposed by the EPA but the facts are, jobs are created when improvements in technology are made. The plan provides a complete package from reasons for change through benefits of such changes right down to the actual implementation of its policy's. It provides areas of assistance for those who have trouble with compliance and places adequate emphasis on continued improvement in all areas regarding air quality. With regard to the health of the planet and the there is little reason remaining for the Federal government not to enforce stricter air quality measures.

Revolutionizing Cancer Treatment - 917 Words

The iKnife: Revolutionizing Cancer Treatment According to the American Society of Clinical Oncology, in a little over a decade, cancer will become the leading cause of death in the United States. The rate of new cases is expected to increase by 45% by 2030. (Wilson, 2014) Undoubtedly, this comes as no surprise to a populace that has seen an increasing number of their friends and family diagnosed with cancer. It seems to have become an epidemic, affecting both young and old, male and female, and rich and poor. For this reason alone, there is a growing interest in new and more effective treatments in the battle against this disease. Cancer research has vastly improved treatments and outcomes over the previous 50 years, starting with only a handful of treatments half a decade ago, to more than 170 FDA-approved anti-cancer drugs today. (Wilson, 2014) Still, new and better treatments that reduce recovery time and increase success rates are constantly pursued. There is promise for new technology called the iKnife, a cancer â€Å"sn iffing† surgical scalpel; which is said to identify all of a the cancerous parts of a tumor so that it is removed with 100% accuracy. Should the iKnife prove to be what it is promised to be, not only will it improve overall outcomes for patients, it will also revolutionize the treatment of cancer entirely. What is it that makes this tool so revolutionary? The iKnife reportedly â€Å"sniffs† out cancer cells. This is accomplished by mass spectrometry analysis ofShow MoreRelatedCar T Cell Therapy : A Revolutionary Treatment From The Area Of Immuno Oncology1664 Words   |  7 PagesCAR-T Cell Therapy CAR-T cell therapy is a revolutionary treatment from the area of immuno-oncology. It is the most recent form of therapy to be hailed as a ‘miracle cure’ for cancer and is one of the most impressive forms of immunotherapy to date. 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