2.4.1 Van Leeuwen’s Sociosemantic Inventory Sociosemantic inventory is one of model analyses carried by Theo Van Leeuwen which aims at detecting and analyzing how a person or group is marginalized in discourse. Leeuwen (2008) proposed this theory based on the consideration that language cannot be defined only from its literal meaning or the structure because language has to be balanced with the reality. Another consideration is based on consideration that culture determines a meaning. It is meant
With the development of modern technologies, people enjoy their lives with higher level of quality. This results in the extension of average humane life time and the rapid changes of age structure of the population in the world. There are increasing demands for replacing the failed tissues on aged people. For example, if injury occurs on knees, the ability to flex the knee will be restricted due to pain. Deterioration of the knee joint would make it difficult to perform everyday activities. Even
By the third millennium, mankind is actively studying and exploring space. The number of space flights is increasing and they are constantly running into a number of problems. One of these is a question of the increasing contamination of space with objects from our explorations. These objects are better known as space debris or simply said – space junk. Space debris is man-made objects in Earth’s orbit or objects that reenter the atmosphere, including parts that have finished their active existence
Examining the Effects of pH Level on Lead Concentration Dr. Couper Azzara Nincevic 5 October INTRODUCTION PURPOSE The purpose of this experiment is to investigate how the pH of a solution affects the lead concentration of that solution after a lead sinker is submerged for 24 hours. The independent variable is the pH of each solution group; the dependent variable is the lead concentration of the solution after 24 hours. BACKGROUND RESEARCH The element lead has atomic symbol Pb
strength and ductility, and high chromium content characterize stainless steels. They are called stainless because in the presence of oxygen (air) they develop a thin, hard adherent film of chromium oxide that protects the metal from corrosion (passivation). This protective film builds up again in the event that the surface is scratched. QUALITATIVE PROBLEMS 5.20. Explain why continuous casting has been such an important technological advancement. The inefficiencies and the problems involved in
the combination of 270 different minerals. Previously it was produced in 1924 for the first time. Bauxite is the chief ore of aluminum. Aluminum is famous because of its low density and its ability to resist corrosion by using the phenomena of passivation. Alumina is an integral part of an aerospace industry, electrical engineering, and transportation with its other alloys. It is also used in building and window
In 1830 Michael Faraday predicted a relationship between the charge passed and the amount of a substance oxidized or reduced at an electrode. His proposal was based on two main arguments related to electrolytic processes: i) The amount of chemical change produced by an electrical current is proportional to the quantity of electricity passed. ii) The amounts of various substances liberated by a given quantity of electricity are inversely proportional to their chemical equivalent weights. These principles
grown on N+ Si substrate are reported. The most intriguing electronic property of silicon carbide is that it is the only semiconductor material other than silicon that can have electronically passivated surface to industrial standards. The surface passivation is the main reason for the dominance of silicon but, in addition to that, silicon carbide has superior bulk properties. This combination of factors raises the question whether silicon carbide can play a role in main stream electronics (integrated-circuit
Photoluminescence is the emission of light from any form of matter after the absorption of photons (electromagnetic radiation). It is a form of luminescence (light emission) and is initiated by photoexcitation (excitation by photons), thus the prefix photo. After excitation various relaxation processes typically occur in which other photons are once again radiated. The time periods between absorption and emission may vary: ranging from short femto seconds to milliseconds for phosphorescent processes