Sunday, February 23, 2020
Looking back over the span of American history since 1607, what Essay
Looking back over the span of American history since 1607, what historical evidence supports Kinzer's assertion - Essay Example They vary in heritage and their ancestors came from different coasts. However, they share commonalities in valuing enjoyment of rights, liberty, fairness, and equal treatment of people which serves as purposive guide in their way of life. It is from this context that America has been historically intervening in varied nations in the name of freedom. Itââ¬â¢s also from this political purview that Stephen Kinzer, prominent writer author of Kinzer, Overthrow: Americaââ¬â¢s Century of Regime Change from Hawaii to Iraq, pointed that America perceived itself as ââ¬Ëa peculiar, chosen people, the Israel of our times.ââ¬â¢ Kinzer (2006), a political analyst, perceived that most of the intervention done my American government in other sovereign nations is motivated to protect its business interests from possible restriction and regulations-- such as demands for taxation, labor laws and environmental protection, through geopolitical strategies. Kinzer (2006) pointed that these rest rictions imposed by nations, where American multinational companies are operating, are perceived anti-American, repressive or probably dictatorial. When conflict is heightened, the intervention could either be considered economic, political or an operation for liberation from perceived tyrannical governments. He cited that US lead-participation in overthrowing governments was evident in Hawaii in1893 to Iraq in 2003. Kinzer (2006) also contended that American-led or supported coups d'etat in Hawaii, Cuba, Puerto Rico, Philippines, Nicaragua, Honduras, Iran, Guatemala, South Vietnam, Chile, Grenada, Panama, Afghanistan, and Iraq was a result of similar causes and motivation. Critical of its view, Kinzer argued that in 1898, US helped local rebels in Cuba to overthrow the Cuban government. Is this messianic political view of America indeed evident in the anal of its history? In the 16th century, under Colonial America, it was reckoned that Europeans traversed to America for economic r easons, to escape religious persecution and they settled at what they called the New World. Many of them lived with the assistance of Native Americans and started farming to produce corn grains and tobacco. They also engaged themselves in mercantilism to increase political power and wealthââ¬âthus, the extraction of gold and silver from North America and subsequently brought to London market. Mercantilism was protected by government through tradesââ¬â¢ regulation and by providing subsidies for emerging industries to develop exports and control imports. The period was however characterized with smuggling, an American way to dodge out trading restrictions of European nations. Conflict rose as pirates launched several attacks. Conflict heightened until Seminoles from Georgia killed the remaining Indian residents at Florida. The regions of New Mexico, Arizona, Colorado, Oklahoma, California and Kansas were also explored by Spanish conquestadores. Missionaries were sent in these a reas to propagate Christianity and to declare historic claims. American conquered and recovered the sites
Friday, February 7, 2020
Recycled Rubber Tyres as Aggregate in Concrete Essay
Recycled Rubber Tyres as Aggregate in Concrete - Essay Example The paper tells that the ability to change the levels of consumption in the UK is one which is essential to the needs to create a sustainable world and to alter the pollutants which are coming from different resources. A technology which is being created is with the use of recycled rubber tyres. There is the option of allowing this to work as an aggregate in concrete, specifically to begin changing the consumption in the UK and to begin lowering the number of toxins with the tyre production that occurs every year. While there is a large amount of consumption and changes with the tyres, there is also a question of whether the aggregate in the concrete is able to create the same substance and material responses as other forms of technology for concrete. This is able to alter and change the way in which the aggregate can be used while determining if the tyres can be recycled into a different substance for other needs. The first question which is associated with the recycled rubber parti cles is based on the understanding of cement paste and how it responds and reacts to the rubber tyre particles being added as a part of it. In a study of Segre Joekes, there was a modification to the cement by adding in rubber tyre powder to the aggregate. The study looked at the cement paste and the way that the surface began to change after a period of 20 minutes. The substance was examined in terms of absorption, density, flexural strength, compressive strength, abrasion resistance, elasticity and fracture energy measurements. The measurement then looked at the level of Sodium Hydroxide (NaOH) with the rubber. It was found that the rubber not only assisted with the mix of the materials in the cement but also increased the level of flexibility, durability, toughness and compressive strength. The conclusion was not only with the improvement of quality with the cement. It was noted that by using the rubber tyres as a part of the cement, different formats for roads and other road con struction areas could be used. The substance which was created from the recycled rubber tyres is one which is not as course, meaning that the use on road construction can help with more durability and sustainability with the recycled rubber (Segre, Joekes, 2000: 1421). The overall changes which were made with the concrete also refer to the rubber tyres changing the properties of the cement to create different levels of substance to be used in different areas. The association with tyres is one which is able to automatically change and assist with the overall needs and properties for strength, specifically with roads and areas which have continuous use and fluctuation. The changes with the cement also show that the use of magnesium oxychloride, a natural property found in rubber, is able to provide more functioning for the cement. This particular substance is able to work to bind the concrete mixtures in a way that improves the strength and durability of the substance. The rubberized concrete not only has the ability to directly impact and improves the concrete which is used. The magnesium oxychloride as a binding substance can help in changing the way in which concrete is used and allows the mixture to provide even more solutions to the substance. The substance differs with the types of tyres which are used, amount that is mixed with the concrete and is dependent on factors such as unit weight, air content and slump. Incorporating these into the mixture is then noted as essential for creating the correct mixture and alternatives with the rubber tyres and concrete mix that is used (Siddique, Naik, 2004: 563). 2.2 Compressive Strength The additional alternatives which are a part of the rubber tyres used in aggregate
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