For other universities with a similar name, see Southwest University .University of the Southwest is a private inter-denominational four-year educational institution located in Hobbs, New Mexico. It was incorporated under its current name in 1962, although the college existed several years prior to that as a two-year Baptist institution.The college offers baccalaureate degrees in education, business administration, sport management, criminal justice, psychology, and others. In addition, the college awards the master's degree in a variety of educational disciplines including business, counseling, special education, and bilingual education.In March 2008 school's Board of Trustees voted to change the official name of the college from College of the Southwest to "University of the Southwest" to better convey what the college has become and where the trustees see it going. The change will be implemented in phases over the coming year. Wikipedia.
Pithon M.M.,University of the Southwest |
Pithon M.M.,Federal University of Rio de Janeiro |
Figueiredo D.S.F.,Pontifical Catholic University of Rio de Janeiro |
Oliveira D.D.,Pontifical Catholic University of Rio de Janeiro
Journal of Oral and Maxillofacial Surgery | Year: 2013
Purpose: The current study sought to evaluate the influence of the length of the mini-implant on its mechanical properties. Materials and Methods: A total of 405 mini-implants from the same manufacturer were divided into 3 groups (n = 135) according to whether they were 6, 8, or 10 mm in length. An insertion torque test was performed using minipig osseous tissue of different cortical thicknesses (1 mm to 6 mm). To assess the maximum fracture torque during insertion, the mini-implants were inserted into swine femoral cortical bone. A digital torque gauge was positioned perpendicularly to the bone surface to measure this parameter. To evaluate the deformation and subsequent fracture due to a bending force, the mini-implants were subjected to loading orthogonal to their length at a speed of 0.5 mm per minute. Results: The insertion torque increased with increasing screw length and increasing cortical bone thickness. There were no statistically significant differences between the different implant lengths with respect to the insertion torque force required for fracture (P >.05) or the forces required for deformation (P > .05) and fracture (P >.05) when submitted to flexion. Conclusions: Increasing the length of the screw does not increase its mechanical strength, but can efficiently reinforce the initial stability of mini-implants.© 2013 American Association of Oral and Maxillofacial Surgeons.
Li X.,Guangxi University |
Yin G.,Chongqing University |
Yin G.,University of the Southwest
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2011
Tests of microscopic characteristics and seepage properties were done respectively, using different coals from the typical coal mines. The results show that specific surface area and adsorption/desorption capacity of outburst coal is higher than those of delay outburst coal and non-outburst coal, and delay outburst coal at intermediate between the two others. Adsorption capacity of outburst coal is strong, desorption velocity is very fast too. It can form very high gas pressure which enhance destructiveness of coal-rock. Permeability of non- outburst coal is about 4 times higher than those of other coals at the largest department. If coal's seepage properties are excellent, methane moves very easy in the coal seam in which gas storage condition is very poor and methane detaches very easy from it. Conversely, the outburst risk may increase. It is shown that the seepage property is an important index of the outburst risk of the coal seam. In a word, the seepage property and microscopic characteristics of coal are closely related to which the coal has strong adsorption/desorption characteristics, relatively poor seepage property, rather low strength, and is easy to fail. So it has very high outburst risk.
Willison J.H.M.,Dalhousie University |
Li R.,Chongqing Normal University |
Yuan X.,Chongqing University |
Yuan X.,University of the Southwest
Environmental Science and Pollution Research | Year: 2013
The Three Gorges Dam on the Yangtze River in China has created a major reservoir in which the water level fluctuates annually by about 30 m, generating a drawdown zone of up to 350 km2 in summer. Since construction of the dam, there has been scientific and public interest in how to use the drawdown zone resources in environmentally sustainable ways. To this end, and with government support, an international conference was held in Chongqing Municipality (China) in October 2011 on the subject of conservation and ecofriendly utilization of wetlands in the Three Gorges Reservoir. The conference proceedings were subsequently published in the Journal of Chongqing Normal University. The proceedings reports are reviewed here in the context of other relevant literature. The proceedings included papers on ecology, ecodesign and ecological engineering, erosion control, plant production and carbon sequestration, phytoremediation of pollution, hydrosystem management, and others. Several of the reports derive from experimental work conducted at a research field station on the Three Gorges Reservoir situated in Kaixian County, Chongqing Municipality. Plant communities in the drawdown zone are declining in diversity and evolving. Experimental plantings of flood-tolerant edible hydrophytes in a dike-pond system reveal their potential to provide economic returns for farmers, and flooding-tolerant trees, such as cypresses, also show promising results for stabilizing soils in the drawdown zone. Flood-tolerant natural plant communities vary strongly with depth and their composition provides useful indicators for revegetation strategies. In the region surrounding the reservoir, remnant natural broad-leaved evergreen forests are most effective in sequestering carbon, and within the drawdown zone, carbon is mostly stored below ground. There is strong interest in the potential of aquatic plants for removal of pollutants, notably N and P, from the reservoir water by means of floating beds. Other examples of applying ecodesign and ecological engineering strategies for restoration and management of rivers and lakes are also given. Scientific studies have provided valuable advice for ecofriendly utilization of the reservoir drawdown zone and further studies of the evolving condition of the reservoir can be expected to pay additional practical dividends. © 2012 Springer-Verlag Berlin Heidelberg.
Pithon M.M.,University of the Southwest
Orthodontics : the art and practice of dentofacial enhancement | Year: 2011
To assess the fluoride release from adhesives used for bonding in orthodontics. Six bonding agents were evaluated: five adhesives (Biofix, Fill Magic Orthodontic, EagleBond, Orthobond, and Transbond XT) and one resin-reinforced glass-ionomer cement (Fuji Ortho LC), the latter serving as a control. Ten samples of each adhesive were stored in containers with 5 mL of deionized distilled water at 37°C. Fluoride release was measured with an ion-specific electrode. Readings were taken periodically for a total of 33 days. On day 28, all samples were immersed in a 0.221% sodium fluoride solution for 5 minutes to assess their recharge potential. Descriptive statistics were calculated for the fluoride release rates of each material. ANOVA with multiple comparisons and the Kruskal-Wallis tests (P < .05) were used to assess differences between the groups. All adhesives released significant amounts of fluoride (P < .05). During the first day, Biofix released the highest amount of fluoride, followed by Fuji Ortho LC, which also showed the highest fluoride release from day 7 to day 33. The fluoride release from Biofix and Fuji Ortho LC decreased by the third day to 40% of its original value. All other adhesives maintained their fluoride release with only small fluctuations. All the materials released significant amounts of fluoride, with Biofix having the highest release in the first 3 days and Fuji Ortho LC over the total length of the experiment.
Yin G.,University of the Southwest
Chongqing Daxue Xuebao/Journal of Chongqing University | Year: 2010
Based on the elastic contact finite element method(FEM), three-dimensional static contact model of high-contact-ratio gears is established. The Newton-Raphson(NR) method is used to get the contact stress. Load distribution factor of gear teeth and the influence of different friction coefficients were achieved by the FEA. Comparison with Hertz contact stress, the maximum contact stress is less than Hertz stress. Natural frequencies and major modes of the gear are calculated by the Lanc20s method, and the results provided theoretical basis for the design and application of helical involute gear.