Phlogiston Theory According to the phlogiston theory‚ propounded in the 17th century‚ every combustible substance consisted of a hypothetical principle of fire known as phlogiston‚ which was liberated through burning‚ and a residue. The word phlogiston was first used early in the 18th century by the German chemist Georg Ernst Stahl. Stahl declared that the rusting of iron was also a form of burning in which phlogiston was freed and the metal reduced to an ash or calx. The theory was superseded
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Charles Darwin 1809-1882 Darwin was an English naturalist‚ who developed the theory of evolution through natural selection‚ to explain how the millions of species that inhabit the earth originally came into being. He published “On the origin of species” in 1859‚ in which he described his theory of evolution through natural selection. Darwin studied and observed a variation of plants‚ fossils and animals on the Galapagos islands and found they resembled modern species‚ and that most the animals
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Scientific Theory A scientific theory is a well-substantiated explanation of some aspects of the natural world‚ based on a body of knowledge that has been repeatedly confirmed through observation and experiment. Scientist creates scientific theories from hypothesis that have been corroborated through the scientific method‚ then gather evidence to test their accuracy. The strength of a scientific theory is related to the diversity of phenomena it can explain‚ which is measured by its ability to make
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Over time‚ many theories have been developed to explain crime. Some are more effective and feasible in explaining crime than others. This can be seen in the cases of Rational Theories and the Labeling Theory‚ Rational Theories being the better explanation. To prove this point‚ we will first examine the Labeling theory and its policy implication. The Labeling theory works on the basis that when dealing with crime‚ the behavior is not as important as the reaction to said behavior (the label). This
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differ on the situations that they are into and people have to “fit in” to those situations. There are a number of theories that attempt to account for our personalities and explain how we come to be the way we are. Theories of Personality Theories of personality are explored in order to have a better understanding about different personalities that people exhibit. 1. Trait theories According to the Diagnostic and Statistical Manual of the American Psychiatric Association (DSM-IV-TR)‚ personality
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made much advancement in the field of psychology with their theories‚ clinical evidence‚ and expertise. Some views they shared‚ others they did not. However‚ both psychologists theorized that people have a hidden’ personality within them‚ one which they are not aware of. Although both theories were developed through many years of clinical experience‚ they are each based on their own‚ inherently different assumptions; although both theories include a hidden personality’‚ the concept of human nature
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media as an academic discipline C. DEFINING THEORY Theory – system of law-like propositions THEORY – helps make sense of phenomena THEORY – helps in guiding action THEORY – helps predict consequence/behavior of reality THEORY – propositions to understand reality KINDS OF MEDIA THEORY * Social Scientific * based on systematic and objective observation of media and other relevant factors * quantitative * the dominant theory * Normative * concerned with prescribing
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“Foundations of Portfolio Theory” by. H.M. Markowitz (1991) Foundations of Portfolio Theory by H.M. Markowitz is based on a two part lesson of microeconomics of capital markets. Part one being that taught by Markowitz‚ which is solely geared toward portfolio theory and how an optimizing investor would behave‚ whereas part two focuses on the Capital Asset Pricing Model (CAPM) which is the work done by Sharpe and Lintner. In this article Markowitz speaks strictly on portfolio theory. He states that there
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What is interesting about these five contributions is how Rawls’ speculative thought has been used by scholars across disciplinary lines‚ influencing such diverse academic disciplines as economics‚ law‚ political science‚ sociology‚ and theology. A theory of justice... Rawls’ most famous work‚ A Theory of Justice (1971)‚ provides an introduction to this body of thought as well as some of its implications for ethics. Like many philosophers before him‚ Rawls focused upon justice because of its substantive
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The research is based on two major theories: Multiculturalism theory and Islamic banking theory. Multiculturalism theory‚ as a part of political philosophy focuses on appropriate understanding and responding to issues derived from cultural and religious diversity. Scholars recognize the existence of barriers that minorities are struggling with in order to pursuit their social practices (Song‚ 2017‚ para.1-2). Song (2010)‚ suggests that a proper response is to tackle cultural diversity with group-differentiated
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