In this paper, we first split the biharmonic equation !2u = f with nonhomogeneous essential boundary conditions into a system of two second order equations by introducing an auxiliary variable v = !u and then apply an hp-mixed discontinuous Galerkin method to the resulting system. The unknown approximation vh of v can easily be eliminated to reduce the discrete problem to a Schur complement sys...

A time-spectral and adjoint-based optimization procedure that is particularly efficient for the analysis and shape design of helicopter rotors is developed. The time-spectral method is a fast and accurate algorithm to simulate periodic, unsteady flows by transforming them to a steady-state analysis using a Fourier spectral derivative temporal operator. An accompanying steady-state adjoint formu...

Blade section normal force and pitching moment were investigated for six rotors operating at transition and high speeds: H-34 in flight and wind tunnel, SA 330 (research Puma), SA 349/2, UH-60A full-scale and BO105 model (HART-I). The measured data from flight and wind tunnel tests were compared with calculations obtained using the comprehensive analysis CAMRAD II. The calculations were made us...

To ensure robust, reliable, retrievable and sharable metadata, the University of Houston (UH) Libraries initiated a Metadata Upgrade Project in 2013 to systematically audit and refine the quality of the metadata in the University of Houston Digital Library (UHDL). Still in progress, the Metadata Upgrade Project has already produced significant discoverability improvements in the UHDL’s legacy m...

where gh is an approximation of g and V 0 h ⊂ H 1 0 (Ω) is a finite element subspace. In practice, gh is considered to be a nodal interpolation of g in Vh|∂Ω, where Vh ⊂ H(Ω) is a finite element subspace. However it is shown in [4] that the error estimates for (3) are better when gh is chosen to be the L2-projection of g onto Vh|∂Ω. In particular when gh is chosen to be a nodal interpolation, t...

In this study, we investigate cross-linguistic patterns in the alternation between UM, a hesitation marker consisting of a neutral vowel followed by a final labial nasal, and UH, a hesitation marker consisting of a neutral vowel in an open syllable. Based on a quantitative analysis of a range of spoken and written corpora, we identify clear and consistent patterns of change in the use of these ...

Back-channel feedback, responses such as uh-uh from a listener, is a pervasive feature of conversation. It has long been thought that the production of back-channel feedback depends to a large extent on the actions of the other conversation partner, not just on the volition of the one who produces them. In particular, prosodic cues from the speaker have long been thought to play a role, but hav...

In this work we describe the system built for the three English subtasks of the SemEval 2016 Task 3 by the Department of Computer Science of the University of Houston (UH) and the Pattern Recognition and Human Language Technology (PRHLT) research center Universitat Politècnica de València: UH-PRHLT. Our system represents instances by using both lexical and semantic-based similarity measures bet...

Speakers often repeat the first word of major constituents, as in, "I uh I wouldn't be surprised at that." Repeats like this divide into four stages: an initial commitment to the constituent (with "I"); the suspension of speech; a hiatus in speaking (filled with "uh"); and a restart of the constituent ("I wouldn't."). An analysis of all repeated articles and pronouns in two large corpora of spo...

This paper presents a comparative analysis of two hydrological models in the Storm Water Management Model (SWMM) software, namely, non-linear reservoir (N-LR) and unit hydrograph (UH), on urban catchment Cascina Scala, Pavia Italy. The were applied for simulation rainfall-runoff transformation 42 sub-catchments while flow routing underground channels was simulated by means De Saint-Venant equat...