Sunday, January 26, 2020

Linear Variable Differential Transformer and Strain Gauge Transducer

Linear Variable Differential Transformer and Strain Gauge Transducer There are many types of transducers displacement measurements, Linear variable differential transformer (LVDT), capacitive transducer, potentiometer transducer, resistive transducer, optical transducer, etc. For our experiments purpose we use the LVDT, since its able to produce high output for relatively small displacement and for strain measurement we use the strain gauge transducer. Linear Variable Differential Transformer(LVDT): The linear variable differential transformer (LVDT) is a type of electrical transformer used for measuring linear displacement. The transformer has three solenoid coils placed end-to-end around a tube. The centre coil is the primary, and the two outer coils are the secondarys. A cylindrical ferromagnetic core, attached to the object whose position is to be measured, slides along the axis of the tube, the figure below shows the construction of the LVDT. When an alternative current is applied into the primary coil, a voltage is induced in each secondary core; those voltages are directly proportional to the mutual inductance induced with the primary. As the core moves, these mutual inductances change, causing the voltages induced in the secondarys to change. The coils are connected in reverse series, so that the output voltage is the difference between the two secondary voltages. When the core is in its central position,the distance between the two secondarys is equal ,hence equal but opposite voltages are induced in these two coils, so the output voltage is zero. When the core is displaced in one direction, the voltage in one coil increases as the other decreases, causing the output voltage0 to increase from zero to a maximum. This voltage is in phase with the primary voltage. When the core moves in the other direction, the output voltage also increases from zero to a maximum, but its phase is opposite to that of the primary. The magnitude of the output voltage is proportional to the distance moved by the core (up to its limit of travel), which is why the device is described as linear. The phase of the voltage indicates the direction of the displacement. Because the sliding core does not touch the inside of the tube, it can move with little friction, making the LVDT a highly reliable device. LVDTs are commonly used for position feedback in servo-mechanisms, and for automated measurement in machine tools, control systems, robots, and many other industrial and mechanical systems. Strain Gauge: Strain gauge transducers are kind of sensors that transduce(convert) strain applied into an electrical signal ( usually voltage) for the purpose of pressure sensors applications, force and torque measurements. It was invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. A strain gauge is simply a resistor, whose value varies with strain in the material to which it is bonded. They can be used in various fields when a readable value needed to be modeled from a force or strain applications. The construction of the strain gauge sensor is as shown in the following figure. As seen in the figure it has a fine resistance wire, sensitive for load weights. Objectives: To obtain a characteristics of the LVDT and Strain gauge sensor. To obtain a mathematical equation for the sensors response. To obtain distance measurement using LVDT and Strain Gauge sensor and convert it to a Human readable form. Objectives: To obtain a characteristics of the LVDT and Strain gauge sensor. To obtain a mathematical equation for the sensors response. To obtain distance measurement using LVDT and Strain Gauge sensor and convert it to a Human readable form Significance of the problem: By doing this experiments, the functions of LVDT can be learnt. The LVDT advantages might be useful for lots of project such as measurement process, silent process, and any process that needs fast output generation. The disadvantages of LVDT also can be observed by doing this experiment, which are important to be learnt. By knowing the disadvantage, students can take these matters into consideration during system designing process. The importance of Strain gauge also can be learnt in this lab topic. In robotic system, force measurement is very important. The voltage used must be relevant depending to the load given. Energy wasting will happen if relation between load and voltage is ignored. Nowadays many companies want to produce something that saves energy and environmental friendly, so strain gauge can help to achieve that objectives. 1.3 Background and Literature Review LVDT Linear variable differential transformer is popularly known as LVDT. The LVDT contains one primary winding, and two secondary windings connected to each other in series opposing manner as shown in the figure below. The body whose displacement is to be measured is connected to the iron core. According to Haresh Khemani in Jan 28, 2010, graduate of Mechanical Engineering from University of Pune, India, LVDT comprises of the differential transformer that provides the AC voltage output proportional to the displacement of the core passing through the windings.. According to him too, LVDT is basically a differential transformer, whose voltage output is linear to the displacement of the object hence it is given the name linear variable differential transformer. Meanwhile, according to Measurement Specialties Incorporation.,a leading global designer and manufacturer of sensors and sensor-based systems, An LVDT, or Linear Variable Differential Transformer, is a transducer that converts a linear displacement or position from a mechanical reference (or zero) into a proportional electrical signal containing phase (for direction) and amplitude information (for distance).. According to this company, the operation does not require electrical contact between the moving part (probe or core rod assembly) and the transformer, but rather relies on electromagnetic coupling; this and the fact that they operate without any built-in electronic circuitry are the primary reasons why LVDTs have been widely used in applications where long life and high reliability under severe environments are a required, such Military/Aerospace applications. LVDT have been used widely in many applications. Companies such as Trans-Tek Inc. had done so many applications on LVDT such as LVDT use in ATM to Sense Dollar Bills by using miniature transducers, such as the Series 230 AC-AC LVDT. The low mass core is ideal for systems with low driving forces or high acceleration and, therefore, will not adversely influence the delicate nature of these applications. One application requiring a miniature LVDT is the multiple bill detector of an automated teller machine, or ATM. This mechanism is capable of detecting single, double and triple bills, as well as folded, taped, overlapping and soiled bills. Combining an AC-AC LVDT with the necessary electrical components will result in a relatively low-cost system with high-end performance. AimRite Holdings Corporation is a pioneer in the field of computer controlled suspension technology for the automotive industry. Targeting mainly sports utility vehicles (SUV) trucks, buses and RV.s, AimRite.s trademark product the COAST system uses the Model 0283-0000 AC-AC LVDT for continuous position feedback. This advanced suspension design offers numerous benefits including: luxury car ride with sports car performance, on-road and off-road application, replacement of sway bars and shock absorbers, simultaneous control of all vehicle dynamics, compatibility with conventional or air springs, reliability and flexibility at a minimal cost, and robust construction. Strain Gauge According to National Instrument, Strain is the amount of deformation of a body due to an applied force. More specifically, it is defined as the fractional change in length, As shown below it can be seen that strain can be positive (tensile) or negative(compressive) depending on the direction of force given. The strain gauge is one of the commonly used strain measurement sensors. It is a resistive elastic unit that changes in resistance is a function of applied strain. Where R is the resistance,  Ã‚ ¥ is the strain, and S is the strain sensitivity factor of the gage material (gage factor in some books). The majority of strain gauges are foil types, available in a wide choice of shapes and sizes to suit a variety of applications. They consist of a pattern of resistive foil which is mounted on a backing material. They operate on the principle that as the foil is subjected to stress, the resistance of the foil changes in a defined way. According to University of Massachusetts Lowell, strain gauge is a sensor used to transfer a mechanical strain to a quantifiable output. The strain gauge has a resistance which changes as a function of mechanical strain. Although the change in resistance can be quantified using an ohm meter, signal conditioning is used to convert the change in resistance to a voltage. The voltage may then be amplified, thus reducing quantization errors. The relationship between the input strain and the output voltage may be determined using the system sensitivity. In practice, strain measurement involves quantities larger than few milistrain, Therefore, to measure the strain; it requires accurate measurement of very small changes in resistance. To measure such small change, strain gauges are always used in a bridge configuration with voltage excitation source just like the Wheatstone bridge shown below From the equation, when R1/R2=R3/R4, output will be zero. Under this condition, bridge is in balance state. Any change of resistance will give value to output voltage. So if R4 is to be change into active strain gauge, any changes in the gauge resistance will unbalance the bridge and produce nonzero output voltage. In 1992, a patent on Strain gauge for medical applications by Bowman, Bruce R. (Eden Prairie, MN) is published. It is a strain gauge for use in certain medical applications, such as sensing the occurrence of an apnea event. The device is also applicable to monitoring mechanical motion associated with other medical conditions. The strain gauge actually measures the change in DC resistance produced by stretching and compression of a number of carbon deposits coupled in series on a longitudinally extendible substrate. This extendibility is produced by suitably die cutting a flexible but inherently inelastic insulative substrate. The easily produced device may be used externally or encapsulated for implantation. Meanwhile in 1987, Strain gauge scale for weighing fish patented by Reder, Lawrence H. It is a portable scale particularly for weighing fish and normally hand held and which includes a strain gauge for sensing the weight of a fish and the strain gauge providing a leg of a Wheatstone Bridge to provide the measuring of the strain placed upon a member to which the fish is attached. The unit includes battery sources for the required power and includes an LED display unit for reading of the weight of the fish. A zero set may be incorporated in the circuitry or a reset to zero reading may be provided. The unit provides a portable, accurate scale for weighing of fish and the unit may also include selective sensing circuitry for reading of other inputs such as temperature of water. 2.0 Methodology: In this experiment we are using the DIGIAC 1750,Digital-multimeter and oscilloscope. LDVT: Its intended to measure the rectified output voltage using a digital multimeter set on the range of 20V DC. The analog multimeter also used to compare the results when using it against a digital multimeter. The procedure for conducting this experiment are as follows: The circuit is connected as in Figure 6 with the digital multi-meter on the 2V DC range to monitor the output of the Full-Wave Rectifier. The power supply is switched ON. AC Amplifier gain is set to 1000. Gain Coarse and Gain Fine control of Amplifier #1 is set to 100 and 0.2 respectively for and adjusted to produce zero output with zero input. The core position is adjusted by rotating the operating screw to the neutral position to give minimum output voltage (voltage from the digital multi-meter). The result is recorded as in Table 1 below Table 1 The core control screw is rotated in steps of 1 turn for 4 turns in the clockwise direction and the result is recorded. Then the control screw is turned in the counter clockwise direction and the result is recorded. The graph of output voltage from the analog meter readings against core position is plotted. Strain Gauge: The circuit is connected as in Figure 7 below. Amplifier#1 coarse gain is set to 100 The power supply is switched on and the offset control of Amplifier#1 is set to produce zero voltage output under no load condition. Figure 10 : electrical connection of strain gauge Ten coins with similar weights(10 cent coins) are placed on the gauge and the gain fine control is adjusted to produce 7.0 voltage output One coin is placed on the load platform and the value is recorded in table 2 Table2 Step #5 is repeated and all values are noted in the table The graph of output voltage against number of coins is plotted. Another set of ten coins (20 cents) are placed on the load platform and the steps from 4 to 7 are repeated. Results and Analysis: Linear Variable Differential Transformer (LVDT) : The data shown in the following table shows the reading of both the analog and digital multi-meter for 4 turns in the clockwise and anti-clockwise directions after calibrating the core position into the initial neutral position. The results recorded in the table above then plotted on the graph in figure 11, showing the relationship between the output voltage for every respected trun of the core position. The result transformed from the table into the graph resembles the theoretical graph. The maximum negative and positive turn generate maximum voltage. When the turn is at neutral position, the voltage is almost zero indicate that both secondary coils have slightly same value. The graph is not perfectly a straight line due to external disturbance such as electromagnetic field source came from hand phone and other devices Strain Gauge: For this experiment we used two different types of loads with different weights, one with 10 cent coins and the other using 20 cent coins. The purpose of using those two different loads is to ensure accuracy and precision since the output should be the same as long the threshold values are set to be the same for both types.   The plot graph in figure 12 shows number of loads (10 cent) vs. output voltage is a transformation of the readable data into realistic form, which show linearity between the output voltage and the weight of a load. When no load is applied on the strain gauge, the voltage measured is 0V indicated that there is no resistance on the device. Using 10 cent coin, the graph generated is as expected, a linear graph To test the consistency, we used 20 cent coin and the graph generated is almost same as 10 cent coin experiment. 4.0 Discussion: 4.1 LVDT: The outputs produced are actually small, like can be seen in the data record for Digital multi-meter. So amplifiers are used to amplify the output so that the pattern of the output can be observed more clearly. Then, mathematical expression can be obtained. Let say, 9V is the highest output voltage that can be obtained. By using linear equation y = mx + c y is the output voltage x is the number of turns m is the sensitivity c is the displacement/offset For Expected Output: c = 0 because the values touches y axis at 0V. m= (9-0) / (4-0) = 2..25 V/turn So the mathematical expression is: y = 2.25|x|, since for -ve turn, the output is same for +ve turn. For Experimental Output: c = 0.5 For +ve turn, averagely, m = (9-0.5) / (4-0) = 2.125 V/turn So the mathematical expression is: y = 2.125x + 0.5; for positive turn For -ve turn, averagely, m = -(8-0.5) / (4-0) = -1.875 V/turn So the mathematical expression is: y = -1.875x + 0.5; for negative turn Even though the output generated is increasing as the number of turns increases, but the pattern of output readings are not smooth just like the expected output. It can be seen in figure below that the experimental values are not totally linear because the increasing rate is not consistent. This might happen because of LVDT disadvantage which is sensitive to stray magnet field. So, during the experiment, any electronic devices that produces magnetic field such as cell phone and notebook must be avoided to be close to the LVDT In term of waveform generated, it can be seen as in figure 15 that during the zero turn, the output voltage is in same phase as input, except the amplitude is lower. Meanwhile during positive turns, the output is lagging the input and the voltage amplitude is higher. As for the negative turn, the output is leading the output and the amplitude is higher. Strain Gauge Same like the LVDT experiments, the output produced by strain gauge is small, so it is amplified by the amplifier to make the observation more clearly. As illustrated in figure 16, it can be seen that the value of output increase as the number of load increases. By doing this experiment using two types of load, the consistency of the system can be tested. By using 10 cent and 20 cent coins as load, two data sets obtained. There are some differences in the values of the output of these two data. It suppose to give the same value no matter what type of load is used since the value of offset and maximum output have already been set at the beginning of the experiment. This might happen because of the external force as example, from the hand when putting the load on the platform and also from the pressure of the room that are not consistent. Even a small change in pressure of environment can affect the output because output from the strain gauge is amplified by 100. For the mathematical expression for this experiment can be obtain by using the same method as LVDT. By using linear equation y = mx + c y is the output voltage x is the number of load m is the sensitivity c is the displacement/offset For Expected Output: c = 0 because the values touches y axis at 0V. m= (7-0) / (10-0) = 0.7 V/turn So the mathematical expression is: y = 0.7x For Experimental Output: c = 0 because the values touches y axis at 0V. For 10 cent, averagely, m = (7.25-0) / (10-0) = 0.725 V/turn So the mathematical expression is: y = 0.725x; for 10 cent For -ve turn, averagely, m = (7.13-0.) / (10-0) = 0.713 V/turn So the mathematical expression is: y = 0.713x; for 20 cent

Friday, January 17, 2020

Human Use of Animals

Human Use of Animals: Summary and Critique Charles Hall Ivy Bridge College In his interviews with both The Open University and The Colbert Report, Dr. Peter Singer discusses the unethical human use of animals. Most of his claims are highly controversial and are not taken well by most people. Human Use of Animals: Summary and Critique The use of animals in modern civilization has been a controversial subject for the past few decades.Author and Philosopher Peter Singer has made his standpoint clear on this particular subject. In his interviews with The Open University and Stephen Colbert he explains why he believes in what he does and gives his reasoning behind it. Singer’s idea of what defines a person is, â€Å"a person is someone who is aware of their own existence over time, and who is aware enough to realize that they are the same being who lived previously and who can expect to keep living into the future. (Singer 2008) he goes on to give details of what constitutes perso nhood by stating that infants are not persons because they have not yet become self-aware, but a chimpanzee is a person because it can recognize itself in a mirror. He also states that humans with severe brain damage or someone who is intellectually impaired may have once been a person but is no longer a person. Dr.Singer believes that this is an important argument to the wrongness of killing as he clearly states, â€Å"I do think the idea of a being who can envisage his or her own future is morally significant, because if you compare the wrongness of killing a being who is capable of having some anticipation of the future, some desires for the future, perhaps even some projects to complete in the future, and you kill such a person who wants to go on living, you’re doing something wrong to that person which is something you’re not doing if you kill a being who is fully not a person and who can have no wishes or hopes for the future, and therefore you can’t cut off or thwart or frustrate those wishes for the future. So I think the concept of the person points to something that is relevant in the specific context of the wrongness of killing. † (Singer 2008) I disagree wholeheartedly with nearly all of his statements.He seems to state that in a life threatening situation he would put the interests of a chimpanzee before he would a new-born child, when as far as he knows the human child could grow up to be a great leader or scientist, but just because that child is not yet aware that it is not a person and therefore is not as important as the chimpanzee. Singer states that, â€Å"a person is someone who is capable of suffering and therefore it would be wrong to kill them. † If an infant is not a person and therefore is not capable of suffering, then why do they scream and cry when they are injured? Dr. Singer also states his view on the consumption of meat, saying that â€Å"Someone that eats meat is a speciesist because they do not take into account the feelings of the animal which they are eating. (Singer 2008) Could we not say that every species on this planet is the same way? Wolves do not eat other wolves, though they kill prey animals like deer. Does the wolf think about the deer not living anymore? Of course it does not. The wolf is designed to kill other animals to survive. Human beings may not possess the natural tools for hunting but we evolved to a point where we could make our own tools for that job. One could also argue that human beings are natural omnivores, which means that we evolved to eat plants as well as meat. From the archeological records, humans have been omnivorous as far back as science can tell. As soon as the domestication of food sources began, meat was part of humanity’s diet.Our teeth are designed to eat multiple types of food, and our digestive system has enzymes to break down meat that herbivores do not have. Dr. Singer give his view on why we treat animals different ly than human beings. â€Å"The point about speciesism is that we give less weight to the interests of beings who are not members of our species, simply because they are not members of our species; not looking at their individual characteristics, not looking at their capacities, or what’s good for them, or bad for them. But we just say, ‘well they’re not members of the species Homo sapiens, therefore we can use them for our purposes, for our own ends, we don’t have to treat them as if their ends mattered. Whereas if we have a human being, no matter what the mental level of that human being, that human being’s life is sacred, we must respect the dignity of that human being and so on. That’s speciesism, to just take the species in itself as determinative of moral status. † (Singer 2008) It is only natural to look out for the well-being of other members of our species before we think about the well-being of a member of another species. Wo uld you not save a human that is drowning before you tried to save a cow? In his interview with Stephen Colbert, Dr. Singer discusses the rights that animals should have. He talks about how we â€Å"imprison chimpanzees without trial but we do not do the same to humans without proper cause, in most cases. (Singer 2006) When you look at the fact that a Chimpanzee, even a small one is ten times stronger than a human being why would we just allow them to run free around our cities. Could you imagine going to the mall and having a rowdy group of chimpanzees running around the food court? Also, what if animals, which have no understanding of humanity, much less, politics are given the right to vote. That idea in itself is absurd because there are no other creatures on this planet mentally capable of voting in a civilized way other than humans. In Conclusion I would like to say that while I may not agree with Dr. Singer on his ideas of what constitute personhood, I am an animal lover and I do not wish for any animals to be mistreated.I grew up on a farm where we raised cattle, pigs, and chickens. I grew to care for some of these animals. I was also raised to believe that it was only natural for these animals to become food for my family. Humanity has raised, and cared for animals since ancient times. It is one of the things that defines us as a species. Hunting and gathering is encoded in the DNA of the species Homo sapiens. Why would we stop doing something that has been done for millennia? The ethics of the human use of animals is a question that only came to light in the past 100 or so years. What sparked that idea that animals should have the same rights as an intellectual human being?Our minds and the ability to ask the question why is what makes us persons, not just the fact that we can feel pain. The same question why, is what could inevitably be what destroys us as a civilization before all is said and done. References Singer. (Writer) (2008, January 28). H uman use of animals. Ethics Bites. [Audio podcast]. Retrieved from http://www. open. edu/openlearn/history-the-arts/culture/philosophy/human-use-animals Singer, P. S. (2006). Peter singer [Television series episode]. In Colbert, S. (Executive Producer), the Colbert report. New York, NY: Comedy Central. Retrieved from http://www. colbertnation. com/the-colbert-report-videos/79412/december-11-2006/peter-singer

Thursday, January 9, 2020

The Civil Rights Movement And The Movement Of The 1960s

The civil rights movement was a well known movement in which the blacks are entitled to reach Civil Rights and are treated the same in all primary rights for U.S citizenship like possibility of employment, housing, education and right to vote. However, the beginnings of the movement go back to the 19th century, but it raised in the 1950s and 1960s. African American people, with accompany of particular numbers of whites, planned and led the movement at national and local levels. They followed their aims through legitimate means, discussions, petitions, and manipulate demonstrations which were free of violence. The civil rights movement had the most widespread reputation among all social movement of the 20th century in the United States. It had huge impact on the modern women s rights movement and the student movement of the 1960s. The civil rights movement occurred on the American South area considerably. That was where the African American colony was settled and where racial discrimination in education, economic occasion, and political issues was most unconcealed. In the late 19th century, state and local governments made segregation in to the laws, known as Jim Crow laws; they also put restrictions on voting situations that decreased the black population’s authority economically and politically. The movement eventually could influence three areas of favoritism: education, social segregation, and voting rights. In 1954, Brown v. Board of Education of Topeka with accordanceShow MoreRelatedThe Civil Rights Movement And The Movement Of The 1960s1513 Words   |  7 PagesThe civil rights movement was a large and very popular movement that secured African Americans equal access and opened doors for the essential benefits and rights of U.S. citizenship. In spite of the fact that the foundations of the movement go back to the nineteenth century, it crested in the 1960s. African American men and ladies, alongside whites, sorted out and drove the movement at national and neighborhood levels. They sought after their objectives through lawful means, arrangements, petitionsRead MoreThe Civil Rights Movement Of The 1960s And 1960954 Words   |  4 Pagesovercome racial prejudice, truly we have come a long way from the civil rights moment. The history of the United States is a series of many current social changes that have occurred. The Civil Rights Movement of the 1950s and 1960’s was one of the most significant and important for the equality of all people. Because of the abolition of slavery in 1863, many continuous conflict between races of people that live in the United States, rights were violated on a consistent basis, mainly because of the colorRead MoreThe Civil Rights Movement Of The 1960s1654 Words   |  7 PagesThe Civil Rights movement of the 1960s sought to end racial segregation and discrimination and give African American citizens better and equal legal rights. As a result of countless protests and civil rights parties pressing for their constitutional and civil rights day after day, the African American community was able to obtain many of the ideas they were striving for. The Voting Rights Act of 1965 restored and protected their voting rights, while the Civil Rights Act of 1964 banned any d iscriminationRead MoreThe Civil Rights Movement of the 1960’s974 Words   |  4 Pagesof the 1960s, the goal of the Civil Rights Movement, led by Martin Luther King, Jr., was to end legal segregation and to integrate society. His strategy to achieve these goals was non-violent protest. By the end of the 1960s, the Civil Rights Movement moved from integration to black separatism, and the strategy of the movement changed from non-violent methods to a militant style of protest. This change in strategy had a deep impact in the opinions and support of white people for the Civil RightsRead MoreThe Civil Rights Movement Of The 1950s And 1960s1183 Words   |  5 Pagesthe impact of the Civil Rights movement of the 1950s and 1960s on the lives of African-Americans in that period. The Civil Rights movement refers to the movement which aimed to remove racial discrimination and segregation and improve the social, political, legal, and economic rights of black people in America . Alt hough slavery had been abolished with the end of the Civil War , the â€Å"Jim Crow† laws kept black people and white people segregated from each other and the voting rights of African-AmericansRead MoreThe Civil Rights Movement Of The 1960 S1077 Words   |  5 Pagesmany social changes that have occurred. The Civil Rights Movement of the 1960’s was one of the most significant and important for the equality of all people. Since the abolition of slavery in 1863, there had been a continuous conflict between the races of people who live in the United States. African Americans have a history of struggles because of racism and prejudices. Ever since the end of the Civil War, they struggled to benefit from their full rights that the Constitution promised. Jim Crow wasRead MoreThe Civil Rights Movement During The 1960 S1224 Words   |  5 Pagesand negative effects on the people of the US.   During the 1960’s there were a lot of changes and one of these major cha nges was know as The Civil Rights Movement.   The civil rights movement was a movement created by African Americans to achieve rights equal to white people and have equal opportunity in housing, employment, education, the right to vote, and to not be segregated.   This movement had many important leaders that helped get rights for African Americans.   The book â€Å"Tambourines To Glory† isRead MoreThe Civil Rights Movement During The 1960 S1368 Words   |  6 PagesThe American South in the 1960 s and Ancient Thebes both had a rigid social and legal system that did not effectively and legitimately represent the majority of its citizens. In both eras, an antihero rose up to defy the establish system. Dr. King, in the 1960 s, protested unjust laws and was jailed and viewed as an antagonist. Similarly, in Ancient Thebes, Antigone is sentenced to death for doing what she believes is right, regardless of the law. If Dr. King failed, he stood to lose, in additionRead MoreT he Civil Rights Movement in the 1960’s Essay1269 Words   |  6 Pageshave been struggling for equality for many decades. It only seems that during the 1960?s is when there were actual significant advances made. This was about the same time that civil rights came into the political scene. Throughout the South, Blacks were still in the majority, but had no political power what so ever. The Civil Rights Movement gave African Americans a voice and a chance to make a difference. The 1960s helped open up hope and expectations for Black Americans. One of the mostRead MoreThe Civil Rights Movement in the 1960’s Essay1796 Words   |  8 Pages The 1960’s were one of the most significant decades in the twentieth century. The sixties were filled with new music, clothes, and an overall change in the way people acted, but most importantly it was a decade filled with civil rights movements. On February 1, 1960, four black freshmen from North Carolina Agriculture and Technical College in Greensboro went to a Woolworth’s lunch counter and sat down politely and asked for service. The waitress refused to serve them and the students remained

Wednesday, January 1, 2020

The Fundamental Logic behind Intelligent Design - 1150 Words

â€Å"Where did that come from?† Is an innocuous enough question in mundane circumstances, but when applied to something as complex as the human race – and by proxy, to all life – the issue becomes incredibly clouded. The argument that humans and the material universe they inhabit resulted from the conscious and deliberate actions of an outside entity can sound at least passably convincing, even if one is determined to accept biological evolution as an established fact. It is fairly easy to dismiss literal Biblical creationism as irrelevant and/or inappropriate for the discussion of science, but it is harder to object to the formulation of a more sophisticated view that the universe’s form and structure shows signs of having been designed. To†¦show more content†¦Behe also noted that, â€Å"An irreducibly complex system cannot be produced †¦ by slight, successive modifications of a precursor system, because any precursor to an irreducibly co mplex system that is missing a part is by definition nonfunctional†¦. Since natural selection can only choose systems that are already working, if a biological system cannot be produced gradually it would have to arise as an integrated unit, in one fell swoop, for natural selection to have anything to act on.† Harkening back to Bob and his lottery winnings, the probability that irreducibly complex systems would just happen to evolve along Darwinian lines is sufficiently small that we can rationally rule it out as an explanation for irreducible biological complexity [2]. One of the main poster children for human origins is the ape: The theory being that humans and apes evolved from a shared common ancestor. As rational and tempting as it may be to cite the fossil record as evidence that humans evolved over a long period of time, the fossil record is hardly incompatible with intelligent design theory. Complex designs – such as the body of a primate – by their nature contain large amounts of specified and multifarious information. In regards to the creation of life, this means that the intelligent agent behind the design can quickly imbue the biosphere with large amounts of malleable genetic information. If this took place in theShow MoreRelatedDoes God Exist? : A Philosophical Argument For The Existence Of God1370 Words   |  6 PagesIf it is derived from another there must be a being that exists, whose necessity is not derived, that is, an absolutely necessary being. And of course that absolutely necessary being is God. Additionally, something must have had to design the universe. The Design Argument (also known as the teleological argument), suggests we live in a universe that unquestionably had to be designed. The universe, goes the argument, exhibits orderliness and obvious purpose. For example, everything within the universeRead MoreAnalysis Of The Article Blue Collar Brilliance By Mike Rose886 Words   |  4 Pageseducational background. Intellect is spawned from within based on an individual’s experience and desire for additional knowledge. In the article, Blue-Collar Brilliance, Mike rose contends the egocentric notion regarding what makes an individual intelligent; western civilization has drug on their fascistic opinions since earlier times. Everything including one s intellectual capabilities has been measured by a hierarchy designed by the white man in order to oppress non-white civilization. Our intellectualRead MoreGood Strategy And Bad Strategy By Richard Rumelt1652 Words   |  7 Pagescompany’s objective versus their objectives overall. Rumelt divides his book into numerous chapters such as what it takes to develop a good strategy, how bad strategy is formed over time and why it happens so often, chain-link systems, the science behind good strategy, and much more. A good strategy, according to Rumelt, is the first advantage because â€Å"other organizations do not have a strategy†. Most companies have unfortunately been misguided by poor strategy, and they focus on performance objectivesRead MoreEssay on The Fallacy in Teaching Macroevolution as Scientific Theory2237 Words   |  9 Pagesevolutionary theory in classrooms, particularly in communities where religion plays a prominent role in community life. Some church leaders, teachers and school board members argue that alternate explanations provided by creationists or proponents of intelligent design should be taught alongside those of evolutionary theorists in science classrooms. People who are proponents of evolutionary theory are quick to offer a retort, usually suggesting that evolution is a proven fact; while denouncing the two aforementionedRead MoreSeminar Report on Fuzzy Logic6250 Words   |  25 PagesABSTARCT Fuzzy logic  has rapidly become one of the most successful of todays technologies for developing sophisticated control systems. The reason for which is very simple.  Fuzzy logic  addresses such  applications  perfectly as it resembles human decision making with an ability to generate precise solutions from certain or approximate information. While other approaches require accurate equations to model real-world behaviors, fuzzy design can accommodate the ambiguities of real-world in human languageRead MoreCalvins Epistemology Essay1591 Words   |  7 Pagesâ€Å"How is it possible to know anything at all?† John Calvin gives his answer to this timeless question in Chapters 1-3 of his Institutes. His theory of epistemology is based on his belief that humans are naturally aware of God. He also asserts two fundamental knowledges- God and self- and he elaborates upon the relationship between the two. I. Biography of John Calvin A. Birth and childhood B. Schooling and further education C. Early works and accomplishments II. How is it possible to know anythingRead MoreArtificial Intelligence And Human Intelligence3752 Words   |  16 Pagesterm Artificial Intelligence agent is designed is completely dependent on the accepted definition of the concept of Artificial Intelligence. Ergo, it stands to reason that a solid definition may hold the key to the successful development of an intelligent artefact. There are a number of avenues that can be used to define artificial intelligence. As earlier mentioned, there are two dimensions that boast of successful definitions: to begin with, whether it relates to human thought (reasoning) or actionRead MoreCritical Analysis of Efficiency Market Hypothesis2590 Words   |  11 Pagesand selling decisions.’(With respect to Technical Fundamental Analysis). In this essay, firstly, the Efficient Market Hypothesis (EMH) is given an appraisal in relation to random walk, as well as its definition, revealing theories in context of empirical evidence. A brief explanation of the 3 forms of EMH is highlighted alongside a brief description of its tests for validity. The main focus of discussion is whether or not Technical Fundamental Analysis can determine abnormal returns by investorsRead MoreThe Application Of Expert Systems Essay1962 Words   |  8 Pagesprogressed and artificial intelligence has evolved, the use of the term â€Å"expert system† has decreased, as has the application of standalone artificial intelligence systems, and integrated business applications suites that use expert system frameworks behind the scenes have gained traction. This paper discusses the types of expert systems and their role in integrating with decision support systems to provide efficient managerial support tools. Furthermore, this paper will touch upon the evolution ofRead MoreMy Training At Finetech Controls Pvt10703 Words   |  43 Pagesin manufacturing, quality control, or material handling processes. During this period I was made aware about the fundamentals and components involved in the field of automation, from manual switches to sophisticated sensors, along with their operating principles, powering circuits and application based installation. Training was also provided on the operation of Programmable Logic Controllers (PLCs) in order to control each of the various components involved in a process with a purpose to remotely