Bioresorbable screws Essay Example | Topics and Well Written Essays - 1000 words

Bioresorbable screws - Essay Example It is necessary to examine the three stages of the process and anticipate probable flaws in the final product resulting from decisions made at each stage. The melting phase of injection molding is essential to achieve the most even blending possible of the injected material. Too low a temperature may prevent the material from blending into a homogeneous mixture. If the temperature is too high there is a possibility that some material will be lost through evaporation, or combustion under the right circumstances. In any event, excess temperature would result in an inefficient process where energy is wasted, thus raising costs unnecessarily. The speed of the injection of the melt represents a danger as well, too slow and there is a possibility that a portion of the melt may partially solidify before the mixture is sealed into the pressure. Still there is the question of how fast the process absolutely needs to be for industrial efficiency. When the desired mixture is achieved, the press ure inside the injection mold must be intense enough to allow solidification while an optimum distribution of molecules is present, to ensure homogeneity. One possible experimental design is to locate the melting point of hydroxyapatite and then deliver five samples into separate heating elements at ascending 10Â ° increments above that melting point. ... ptimal temperature is determined in this method, material samples heated to the same temperature can be injected into new samples at five different speeds in progressively faster increments which are then sealed prior to hardening. Using the same stress testing, the optimal temperature at the optimal injection speed could then be used in a third experiment involving five samples at different increments of pressure. The stress tests can be repeated. In terms of power analysis, this design allows adjustability and the potential for precision. Five samples for each phase of testing create an experiment that permits the investigator to pinpoint the optimal conditions most conducive to the structural outcome desired. Five samples in 2Â ° increments allow inference of the optimal conditions without redundancy. If at either of these experimental phases there are inconclusive findings in stress testing, then the increment requiring the least amount of energy should be recommended. This prop osed experimental design could be evaluated using logistic regression. If the goal is to assess whether the product will break at a certain level of pressure, then whether breakage occurs is a categorical dependent variable, but this experiment proposes continuous data based upon temperature, injection speed, and mold pressure. This statistical method should provide insights concerning the optimal combination of factors to inform an attempt at reliability testing. For the purposes of this experiment, the continuous gradations in terms of temperature, injection speed, and mold pressure are necessary to provide a range of information that optimizes the probability of finding the most advantageous method. A repetition of these tests can be used to reduce the probability of anomalies and

Anthropology of tourism Essay Example | Topics and Well Written Essays - 750 words

Anthropology of tourism - Essay Example on that the more people have to connect, the more reasons arise as to why people would appear to become desperate to unplug.1 It thus leads to the thesis; tourism remains to be a complex phenomenon that can be understood fully through adopting a multidisciplinary approach. The paper is thus going to justify on this these in relation to Pico Iyers concept of tourism. Right from the start of the book, Pico is explaining as to why he starts thinking of how going slow could be more exhilarating in the age of speed. More, Pico claims that he could feel more luxurious through paying attention in an age of distraction. When it comes to the age of constant movement, Pico argues that it is more fascinating when one sits still in a specific location. Pico acknowledges that one is bound to experience a tremendous time by going on a vacation to Paris, Hawaii or New Orleans.2 However, he goes ahead to justify on his idea that in case one wants to feel new, feel alive, feel full of fresh hope, and to fall in love with world, then the best place for an individual to visit if by going nowhere. Pico in such concepts is trying to explain and justify the reason why being present remains to be more beneficial than compared to jet-setting across the world. The question that one might ask is; how could a traveler like Pico Iyer, being an individual that has journeyed in many areas like Easter Island to Ethiopia and from Cuba to Kathmandu, goes about saying that sitting quite in a room could be the ultimate adventure? Part of the reason as to why Pico presents this view is that people are living in a madly accelerating world, whereby their lives are crowded, very chaotic and noisy. It is by this reason that Pico goes ahead to explain that there is a greater need for slowing down, be able to tune out and give self permission of sitting still for the purpose of achieving the ultimate goal of feeling new, feeling alive, feeling full of fresh hope, and to falling in love with world. The