Materials Tribotechnolgy and Surface Engineering Assignment

Materials Tribotechnolgy and Surface Engineering - Assignment Example Double shear is prominent within pin-and-clevis connections possess the merit of being balanced because of the symmetry. Load P is normally transferred over two cross-sections. Therefore, whilst the bolt transfers the same force P, the corresponding maximum shear stress is half that of the bolt of the single shear. The two-phase field at steady temperature consists of the mixture of copper and Sb, with the composition of the phases at the saturation limits the values on the prevailing boundaries at the end of the tie line. Different compositions at this temperature contain diverse proportions of every phase that the entire fractions of the two elements. The underlying proportions of every phase by weight within the two-phase region such that the weight fractions are mainly fixed by the demand that the matter is conserved. The alloy contains 95 wt% copper and the first is austenitized, and the alloy cools slowly at room temperature at 650 degrees. At 650 degrees the alloy is liquid and it melts to 500 degrees. At the temperature of 450 degrees, the alloy is pure Sb. A detailed view of the arrangement of the atoms around a left-hand screw dislocation has two planes of atoms. The lattice is perfect and the filled circles are directly below the open circles. Within the lower portion of the figure, atom 1 is within the lower level, and atom 2 is above. A Ceramics materials are normally extremely hard and do not deform plastically under tensile stress. Nevertheless, they break suddenly after elastic deformation. Moreover, ceramics materials possess small cracks due to their prevailing processing. Compression stress normally exerts a lot of pressure on the ceramics making it be compact and stronger to forces. Nevertheless, tensile stress leads to the development of cracks on the ceramics due to dislocations and slip of the molecules making it be weak. Since ceramics are brittle in nature, tension load leads to small cracks.

Sleep health Research Paper Example | Topics and Well Written Essays - 1500 words

Sleep health - Research Paper Example planned sleep is associated with various health deficiencies, which include loss of memory, distorted learning abilities and mood problems (Bonnet, 2011). Additionally, without enough sleep, it is naturally difficult for an individual to concentrate or focus. According to a research published in the Southern Medical Journal, sleep deprivation is one of the causes of the cardiovascular diseases, because sleep is essential for giving the heart and the vascular system the much needed rest (Brannon, Feist, & Updegraff, 2013). Sufficient sleep is especially important for adults, considering that they form the bulk of the productive workforce, thus requires being healthy and free of such sleep disorders that may hamper their productivity and effective duty performance. Therefore, increasing the percentage of adults who are able to get sufficient sleep on a daily basis is an important aspect of improving the general health and welfare of the society. Thus, the objective of this discussion is to seek ‘increasing the proportion of adults who get sufficient sleep’. The discussion will focus on female college students as the target community population. The proposed health promotion and disease prevention program is the combination of a wellness support program with prophylactic naps. According to the data from the National Institute of Health (NHI) that has been published in the Journal of Sleep medicine, 29% of the adult American population sleeps for less than 7 hours in a day (Schoenberg& Adams, 2009). Additionally, a study by the institute of medicine has indicated that between 50 and 70 million adults within the USA are suffering from diverse sleep and wakefulness disorders (Institute of medicine, 2006). Another data from the Center for Disease Control (CDC) has indicated that 10.1% of the whole adult population in the USA has reported having insufficient sleep annually (CDC, 2008). The study by the CDC indicated that among the 403,981 respondents that were