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Colorado Springs, CO, United States

The University of Colorado Colorado Springs is a campus of the University of Colorado system, the state university system of Colorado.As of Fall 2014, UCCS has 11,000 undergraduate and 1,700 graduate students, with 26% ethnic minority students.In 2006, the U.S. News & World Report college and university rankings put the UCCS College of Engineering and Applied Science as ranking the fourth-best among public universities and the 16th best overall among bachelor and master's degree engineering schools. U.S. News ranked UCCS as the 32nd in regional universities in the West for the 2011 rankings. For public universities in the Master's Universities-West category it was ranked 6th. It has been ranked in the top ten on that list each year since 2002. For the 2015 rankings released by U.S. News, UCCS was tied 51st overall in the west for all private and public schools. Among public, private and for-profit universities, the UCCS undergraduate engineering program ranked 14th in the nation. Wikipedia.

Pinchuk A.O.,University of Colorado at Colorado Springs
Journal of Physical Chemistry C | Year: 2012

The nonretarded size-dependent Hamaker constant for spherical silver nanoparticles was calculated by using the Lifshitz theory. The size dependence of the Hamaker constant was taken into account based on the size effect of the dielectric permittivity of silver nanoparticles. The experimental data for bulk silver dielectric permittivity was modified to include the intrinsic size effect of the scattering of the conduction electrons by the surface of the nanoparticles. The intrinsic size effect leads to a substantial increase of the Hamaker constant for nanoparticles with radii of the order 1 nm, when the mean free path of conducting electrons in the nanoparticles is limited by the particles' boundaries. © 2012 American Chemical Society. Source

Saha S.K.,University of Colorado at Colorado Springs
IEEE Design and Test of Computers | Year: 2010

Editor's note: Process variability has become a critical issue in scaled CMOS design. This article provides a comprehensive view on the predominant variation sources in sub-90-nm devices, their impact on device and circuit performance, and various modeling approaches for statistical circuit analysis. © 2010 IEEE. Source

Havlick D.G.,University of Colorado at Colorado Springs
Progress in Physical Geography | Year: 2014

Recent military base closures and realignments in the United States have opened dozens of former training and testing sites to new uses and priorities. One common transition is to designate these lands as national wildlife refuges. This presents conservation opportunities on hundreds of thousands of hectares previously under military control, but the ecological restoration and subsequent reuse of these lands is complex and fraught with challenges. Unexploded ordnance, soil and water contamination, reinforced structures, and other military remainders exist on many of these sites, and wildlife refuge managers typically receive little funding or training to contend with such relicts. This paper acknowledges some of the real conservation opportunities provided by military-to-wildlife (M2W) refuges, but emphasizes that restoration and conservation measures at these sites remain bounded by physical and sociopolitical constraints. One outcome of these constraints is 'opportunistic conservation', where habitat and wildlife goals are shaped or constrained by the lingering presence of prior military uses. Working from case studies and interviews conducted at M2W sites in the United States, this research suggests that opportunistic conservation represents a limited vision for restoration and conservation at these places that also potentially obscures these limitations. At many of these same sites, however, more affirmative opportunistic conservation efforts exhibit creative responses given the conditions that exist. © The Author(s) 2014. Source

Plett G.L.,University of Colorado at Colorado Springs
Journal of Power Sources | Year: 2011

Abstract: Battery cell total capacity refers to the total amount of charge that can be extracted from a fully charged cell. Knowledge of the present total capacity value is important to being able to calculate the maximum energy storage capability of a battery pack, the remaining energy in a battery pack, and as an indicator of the battery's state of health. We show that traditional methods of estimating battery cell total capacity, which consider noises only in the accumulated ampere hour measurement, are biased. Battery cell total capacity must be estimated with knowledge of both the noises on the state of charge estimates and on the accumulated ampere hour measurements used to compute the total capacity estimate. We demonstrate how total least squares gives better results than traditional methods, and derive an approximate weighted total least squares algorithm that is suitable for implementation in an embedded battery management system. © 2010 Elsevier B.V. Source

Stevens J.W.,University of Colorado at Colorado Springs
Energy Conversion and Management | Year: 2013

The daily variation in air temperature is large compared with the temperature changes a short distance below the surface of the ground. In theory, a heat engine can be arranged to produce electricity from this temperature difference. In practice, the thermal efficiency of such a device will be low because of the small temperature differences involved. One example of such an energy harvesting device that can produce a small amount of electrical power uses a thermoelectric generator operating between the air and ground temperatures. The low thermal efficiency means that accurately predicting thermal resistances throughout the device and at the air-side and ground-side heat exchangers is critical to the creation of a useful device. Advantages of this device include high reliability, no acoustic emissions, low visibility, significant night-time power production, ruggedness, and long life. With appropriate external power conditioning components, the device could be used to power remote sensors and communications systems. The design of a pair of milliwatt-scale ground source heat engines is described. The devices were fabricated using custom heat exchangers and off-the-shelf thermoelectric modules and other supplies. Both systems were tested over an extended period in order to quantitatively assess effects of sunlight and precipitation on system performance and life. Exhaustive analysis of air-side average heat transfer coefficients, system thermal resistances, and ground-side thermal resistances provides quantitative design information for future applications. Finned and unfinned versions of otherwise identical prototypes permits assessment of fin performance on both ground-side and air-side heat transfer. © 2013 Elsevier Ltd. All rights reserved. Source

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