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Fifth Street, TX, United States

The University of Houston–Downtown is a four-year state university, and is a separate and distinct component institution of the University of Houston System. Its campus spans 20 acres in Downtown Houston, with a satellite location in northwestern Harris County. Founded in 1974, UHD is the second-largest university in the Houston area with nearly 14,000 students.The university serves students in four academic colleges. UHD offers over 50 degree programs: 45 bachelors and seven masters. Awarding more than 2,400 degrees annually, the university's alumni base exceeds 30,000. Wikipedia.


Simeonov P.,University of Houston-Downtown | Goldman R.,Rice University
BIT Numerical Mathematics | Year: 2013

Quantum splines are piecewise polynomials whose quantum derivatives (i. e. certain discrete derivatives or equivalently certain divided differences) agree up to some order at the joins. Just like classical splines, quantum splines admit a canonical basis with compact support: the quantum B-splines. These quantum B-splines are the q-analogues of classical B-splines. Here quantum B-spline bases and quantum B-spline curves are investigated, using a new variant of the blossom: the q (quantum)-blossom. The q-blossom of a degree d polynomial is the unique symmetric, multiaffine function in d variables that reduces to the polynomial along the q-diagonal. By applying the q-blossom, algorithms and identities for quantum B-spline bases and quantum B-spline curves are developed, including quantum variants of the de Boor algorithms for recursive evaluation and quantum differentiation, knot insertion procedures for converting from quantum B-spline to piecewise quantum Bézier form, and a quantum variant of Marsden's identity. © 2012 Springer Science + Business Media B.V. Source


Turski J.,University of Houston-Downtown
Vision Research | Year: 2016

We study geometric properties of horopters defined by the criterion of equality of angle. Our primary goal is to derive the precise geometry for anatomically correct horopters. When eyes fixate on points along a curve in the horizontal visual plane for which the vergence remains constant, this curve is the larger arc of a circle connecting the eyes' rotation centers. This isovergence circle is known as the Vieth-Müller circle. We show that, along the isovergence circular arc, there is an infinite family of horizontal horopters formed by circular arcs connecting the nodal points. These horopters intersect at the point of symmetric convergence. We prove that the family of 3D geometric horopters consists of two perpendicular components. The first component consists of the horizontal horopters parametrized by vergence, the point of the isovergence circle, and the choice of the nodal point location. The second component is formed by straight lines parametrized by vergence. Each of these straight lines is perpendicular to the visual plane and passes through the point of symmetric convergence. Finally, we evaluate the difference between the geometric horopter and the Vieth-Müller circle for typical near fixation distances and discuss its possible significance for depth discrimination and other related functions of vision that make use of disparity processing. © 2015 Elsevier Ltd. Source


Bose U.,University of Houston-Downtown
Computers in Human Behavior | Year: 2015

It is commonplace to have teams of employees working together in the workplace based on the belief that the exchange and leveraging of ideas can result in superior performance. Teams are typically comprised of individuals who come from different backgrounds, have varied experiences, knowledge and values, which they can use to address the tasks at hand. Such differences, however, can also result in conflicts within the team which can be detrimental to team performance. Among the different types of conflict, cognitive conflict is not the outcome of conflict of interest; rather the team members view a task from different perspectives even when they have similar interests in achieving an outcome. We propose and test a group judgment making process architecture supported by group support system (GSS) that we argue will reduce cognitive conflicts and result in solutions that the group members can understand and agree on. It utilizes the multi-attribute utility (MAU) multicriteria decision making technique to structure information and also includes a mechanism for incorporating participant feedback at various stages of the process that should contribute to participants being better able to share values, experiences, and information and obtain a better understanding of the trade-offs that need to be made. When we compared our group judgment making process to a conventional face-to-face group meeting approach as well as a GSS supported process without any required structured decision making process, we found it to be more effective based on four measures of attitude towards the formed group judgment. © 2015 Elsevier Ltd. All rights reserved. Source


Wright K.,University of Houston-Downtown
Communications of the ACM | Year: 2010

When Edgster Dijkstra wrote his paper Go To Statements Considered Harmful, programmers were lost in millions of lines of spaghetti code. Now programmers have lost their way again-this time amidst thousands of unread resumes. Between 2000 and 2004, the percentage of incoming computer science freshmen fell by 60%. Drop rates of 30-50% are common. Results are similar for the other computing related fields including Information Systems, Software Engineering, and Information Technology. Many of these degree programs, which H.A. Simon referred to collectively as the Artificial Sciences, have failed or are about to fail. This loss of student interest in artificial sciences has been blamed in part on the impression that they require extraordinary programming skills. Computing journals perpetuate these notions. For example, in capstone (senior level) computer science courses, students should design and code a 'real world' application. This article is an opposing viewpoint. © 2010 ACM. Source


Jovanovic V.,Schlumberger | Koshkin S.,University of Houston-Downtown
Journal of Sound and Vibration | Year: 2012

We study two models of connected pendulum clocks synchronizing their oscillations, a phenomenon originally observed by Huygens. The oscillation angles are assumed to be small so that the pendulums are modeled by harmonic oscillators, clock escapements are modeled by the van der Pol terms. The mass ratio of the pendulum bobs to their casings is taken as a small parameter. Analytic conditions for existence and stability of synchronization regimes, and analytic expressions for their stable amplitudes and period corrections are derived using the Poincaré theorem on existence of periodic solutions in autonomous quasi-linear systems. The anti-phase regime always exists and is stable under variation of the system parameters. The in-phase regime may exist and be stable, exist and be unstable, or not exist at all depending on parameter values. As the damping in the frame connecting the clocks is increased the in-phase stable amplitude and period are decreasing until the regime first destabilizes and then disappears. The results are most complete for the traditional three degrees of freedom model, where the clock casings and the frame are consolidated into a single mass. © 2012 Elsevier Ltd. All rights reserved. Source

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