Sangyun Lim,† Nan Li,‡ Fang Fang,‡ Mathieu Pinault,§ Codruta Zoican,‡ Chuan Wang,‡ Tarek Fadel,| Lisa D. Pfefferle,‡ and Gary L. Haller*,‡ CheVron Phillips Chemical Company, 1862 Kingwood DriVe, Kingwood, Texas 77339, Department of Chemical Engineering, Yale UniVersity, P.O. Box 208286, New HaVen, Connecticut 06520-8286, CEA Saclay, DSM/ DRECAM/SPAM, Laboratoire Francis Perrin, Bât. 522, P. 249...

Numerically minimizing a continuous free-energy functional which yields several modulated phases, we obtain the order-parameter profiles and interfacial free energies of symmetric and nonsymmetric tilt boundaries within the lamellar phase, and of interfaces between coexisting lamellar, hexagonal, and disordered phases. Our findings agree well with chevron, omega, and T-junction tilt-boundary mo...

We describe non-standard techniques for optical studies of electrocon-vection structures in nematics. The time-resolved textures in the high frequency oscillatory regime are analyzed and compared with results of optical simulations. Conclusions on the relation between director pattern and optical texture are drawn. Using an additional phase plate in the optical setup , we monitor director twist...

Horizontal curves have been recognized as a significant safety issue for many years, a more important factor than road width or sight distance. The research literature suggests that driver errors associated with horizontal curves result from three inter-related problems: failures of driver attention, misperceptions of speed and curvature, and poor lane positioning. To examine the roles of atten...

Noise from commercial high-bypass ratio turbofan engines is generated by turbulent mixing of the hot jet exhaust, fan stream, and ambient air. Serrated aerodynamic devices, known as chevrons, along the trailing edges of a jet engine primary and secondary exhaust nozzle have been shown to reduce jet noise at takeoff and shock-cell noise at cruise conditions. Their optimum shape is a finely tuned...

BACKGROUND The aims of this study were to identify risk factors for the recurrence of hallux valgus deformity and to clarify whether recurrence after surgery to treat hallux valgus can be predicted using radiographic parameters assessed on immediate postoperative non-weight-bearing radiographs. METHODS A proximal chevron osteotomy combined with a distal soft-tissue procedure was performed by ...

AIM To determine the surgically induced astigmatism (SIA) in Straight, Frown and Inverted V shape (Chevron) incisions in manual small incision cataract surgery (SICS). METHODS A prospective cross sectional study was done on a total of 75 patients aged 40y and above with senile cataract. The patients were randomly divided into three groups (25 each). Each group received a particular type of in...

Conventional cooperative protein folding invokes discrete ensembles of native and denatured state structures in separate free-energy wells. Unimodal noncooperative ("downhill") folding, however, proposes an ensemble of states occupying a single free-energy well for proteins folding at >/=4 x 10(4) s(-1) at 298 K. It is difficult to falsify unimodal mechanisms for such fast folding proteins by s...

1 Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, TX 78712, USA 2 Chevron ETC, San Ramon, CA 94583, USA 3 ConocoPhillips, Houston, TX 77252, USA 4 Institute for Computational Engineering and Sciences, Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712, USA 5 Department of Petroleum a...