476 research outputs found
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
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
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