Study of Gas Turbine Blade Cooling

The main focus of this project is to study the heat transfer and temperature profile along the turbine blade surface while the blade is cooled internally (impingement cooling). To observe the cooling process in the gas turbine, a turbine blade geometry model has been created using preprocessor software called GAMBIT. FLUENT software is used to simulate the cooling process of the turbine blade. The simulation result is finally being validated by using published data

The preparation and characteristics of chicken feather / epoxy composites / Ahmad Zafir

The uses of the natural fibre in the fabrication of the composites are being studied all over the world. Most of the fibre used comes from trees. In this research, the fibre or filler used is obtained from chicken feather. The chicken feather was washed and pulverised to obtain a shorter and uniform fibre. Few tests were carried out as to ensure the processed chicken feather will not degrade due to the washing and drying

More Restrictive than Necessary: A Police Review of Secure Housing Units

When almost seven thousand Pelican Bay inmates refused food for weeks on end, California took notice of the unacceptable living conditions in its Secure Housing Units (or SHUs). SHU residents live for months and years with almost no human contact, and succumb to serious mental illness as a result. Despite the attention that the hunger strikes brought to the issue, however, meaningful improvement to California\u27s SHUs does not appear to be on the horizon. This note begins with the history of isolation in American prisons and its use as a means of long-term punishment and control. It then depicts the day-to-day life of SHU residents and the criteria by which prisoners are sent to and released from the SHU. The note moves on to focus on the effects of isolation on prisoners. An evaluation of the SHU and its effectiveness in achieving its stated goals follows. The note then proposes reforms, and concludes by recommending an Eighth Amendment suit claiming that prolonged solitary confinement is cruel and unusual punishment

Influence of Rough and Smooth Walls on Macroscale Flows in Tumblers

Walls in discrete element method simulations of granular flows are sometimes modeled as a closely packed monolayer of fixed particles, resulting in a rough wall rather than a geometrically smooth wall. An implicit assumption is that the resulting rough wall differs from a smooth wall only locally at the particle scale. Here we test this assumption by considering the impact of the wall roughness at the periphery of the flowing layer on the flow of monodisperse particles in a rotating spherical tumbler. We find that varying the wall roughness significantly alters average particle trajectories even far from the wall. Rough walls induce greater poleward axial drift of particles near the flowing layer surface, but decrease the curvature of the trajectories. Increasing the volume fill level in the tumbler has little effect on the axial drift for rough walls, but increases the drift while reducing curvature of the particle trajectories for smooth walls. The mechanism for these effects is related to the degree of local slip at the bounding wall, which alters the flowing layer thickness near the walls, affecting the particle trajectories even far from the walls near the equator of the tumbler. Thus, the proper choice of wall conditions is important in the accurate simulation of granular flows, even far from the bounding wall.Comment: 32 pages, 19 figures, regular article, accepted for publication in Physical Review E 200

Minimum Required Length for Geotechnical Lateral Stability of RockSocketed Pile Shafts

The original strong-rock (SR) p-y curves for rock-socketed shafts exhibit a brittle response where the post-peak resistance drops to approximately zero. This brittle response could result in a progressive failure of the rock p-y curves which, in turn, results in excessive pile lengths. This paper proposes a modification to the strong-rock (SR) p-y curves where the post-peak residual strength is equal to 20% of the ultimate resistance (0.2*pult). This residual resistance is proposed based on the assumption that the lateral resistance of cracked rock (after the peak point) should not be smaller than the lateral resistance of heavily weathered rock estimated from the weak-rock (WR) and Liang et al. p-y curves. The effectiveness of the modified SR curves is evaluated against the results of a lateral load test. The modified SR curves are compared against back-calculated p-y curves from the lateral load test

Examination on determinants of customer satisfaction in student food services

Customer satisfaction plays a pivotal role in success of every business organization whether it is meant for a product or a service. The increasing numbers of higher education students on university campuses ensured the expansion of demand for food service availability and quality on campus. This research conducted to examine impact of service quality, food quality, price, ambience and sustainability practices on customer satisfaction in student's food services. This study also will analyze the mediating effect of perceived value between service quality, food quality, price, ambience, sustainability practices and customer satisfaction. Questionnaires had distributed to 310 respondents which are students who experienced dine at sustainability cafeterias in UTM Skudai. Finding of this study shows that service quality, food quality and sustainability practices positively impact customer satisfaction. Finding also indicated that food quality, ambience, sustainability practices positively impact on perceived value. In addition, results indicated that perceived value mediate relationship between service quality, food quality, and ambience and sustainability practices with customer's satisfaction as independent variable. Practical implication of this study can be utilized by food service to improve customer satisfaction efficiently

Sanguines et Fusains:poemes

Taha Toros Arşivi, Dosya No: 33-Naciye Tevfik ve Kızı Meliha Zafirİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Slow axial drift in three-dimensional granular tumbler flow

Models of monodisperse particle flow in partially filled three-dimensional tumblers often assume that flow along the axis of rotation is negligible. We test this assumption, for spherical and double cone tumblers, using experiments and discrete element method simulations. Cross sections through the particle bed of a spherical tumbler show that, after a few rotations, a colored band of particles initially perpendicular to the axis of rotation deforms: particles near the surface drift toward the pole, while particles deeper in the flowing layer drift toward the equator. Tracking of mm-sized surface particles in tumblers with diameters of 8-14 cm shows particle axial displacements of one to two particle diameters, corresponding to axial drift that is 1-3% of the tumbler diameter, per pass through the flowing layer. The surface axial drift in both double cone and spherical tumblers is zero at the equator, increases moving away from the equator, and then decreases near the poles. Comparing results for the two tumbler geometries shows that wall slope causes axial drift, while drift speed increases with equatorial diameter. The dependence of axial drift on axial position for each tumbler geometry is similar when both are normalized by their respective maximum values

Aluminide Coatings on Titanium-based Alloy IMI-834 for High Temperature Oxidation Protection

Microstructural aspects and cyclic oxidation behaviour of plain aluminide and Pt-aluminide coatings on the near-a Ti-alloy IMI-834 have been studied. Both the coatings provide good oxidation resistance to the above alloy at 650 °C, 750 °C, and 850 °C. However, significant cracking develops in the coatings during coating formation as well as during cyclic oxidation exposure. The extent of cracking during oxidation is found to increase with the exposure temperature. Presence of through-thickness cracks in the coatings leads to localised oxidation damage of the underlying substrate at all the three temperatures. At 850 °C, such localised oxidation generates enough TiO2 so that this oxide phase grows through the cracks and emerges at the sample surface forming a clearly identifiable mud-crack pattern. The extent of such oxidation damage is comparatively much lower at 750 °C and 650 °C.Defence Science Journal, 2011, 61(2), pp.180-190, DOI:http://dx.doi.org/10.14429/dsj.61.47

Amalan pengambilan dan pemilihan pekerja: Tinjauan ke atas firma terpilih di sektor perkilangan

This survey was conducted to understand the employee recruitment and selection practice at selected firms in the manufacturing sector in Selangor. This study also looked at the importance of several criteria that have been identified at the managerial level employee selection in order to get high quality employee. A total of 57 sets of questionnaires have been returned from 150 that were mailed to the firms all over Selangor. The respondent was either a manager or an officer of the Human Resource Department at every selected firm. From the data analysis that had been done descriptively, a superficial view on the employee recruitment and selection practice in the manufacturing sector was given. This survey’s findings also revealed that the experience criterion is the utmost important element in the employee selection at the managerial level. In addition to that, appearance, demography (gender and academic qualification), and personality factors were among the criteria that are taken into consideration at the employee selection at the managerial level