In addition to existing evidence that postoperative orthogeriatric collaboration improves mortality and functional outcomes in older patients with hip fractures, this study suggests that allowing preoperative geriatric input in this model of care can produce even more superior results.

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These Water resource projects and hydraulic engineering works have been developing rapidly throughout the world, thus prediction of water roughness coefficient is becoming an importance criteria for the designs of hydraulic related structure like open channel, and dam structure. The purposes of this research are to determine the effect of roughness on discharge and study on the factors that affect roughness coefficient. The roughness coefficient for this study is expressed in terms of Manning’s n. Experimental works were carried out to study the effect of roughness by using flumes (8m x 0.3m x 0.4m) with different types of roughened bed such as 2mm grain size plate and 5mm grain size plate. The experiments were being tested with various flow rates for slope equal to 1:300, 1:600 and 1:900 to determine the effect of slope on roughness coefficient. The results of the experimental study were presented and shown that the effect of surface roughness, material grain size, channel slope, and Manning’s roughness coefficient on flow rate. For the range of conditions tested, the discharge was found to be decreased as roughness coefficient increase. From the experiments, it shows smoother surface is having lower roughness coefficient and less retarding effect on the water flow, higher flow rate is produced. As conclusion, flow rate and roughness coefficient were influenced by bed roughness and slope.

We investigate the conservation properties of the centered DG formulation for Maxwell equations. In particular, we state the problem and derive the criteria for charge conservation. It is shown that the centered scheme guarantees strict charge conservation for Cartesian discretizations with tensor product basis functions of arbitrary order. On unstructured grids, however, the conservation of charge is inherently violated. The reasons for this are of purely topological nature.

The Japanese lesson study (JLS) model for curriculum development has seen limited application to middle school science classrooms. The JLS model was used to develop and refine three hands-on activities focused on four major eighth grade science topics from the California curriculum. Prior assessments of these topics showed limited understanding by students at a suburban school with a predominanty underrepresented population in science. Quantitative assessment of student understanding along with observations of the students’ capacity to conduct careful investigations found a large, gender-independent increase in understanding, as well as improved state-mandated test scores. Informal “local proof” assessment resulted in expansion of the JLS model into other grade levels and disciplinary subjects. This led to multiyear school-site reform and recognition outcomes.

In this contribution two novel time integration methods designed for the solution of Maxwell's equations in the time domain using the Finite Integration Theory (FIT) are presented. This work was motivated by the need for simulating particle beams in electrically long structures, e.g., Linear Particle Accelerators. The extension of such a structure along the beam propagation axis is much larger than the transversal dimensions. The simulation of this structures is usually performed by the Staggered Leap-Frog (SLF) time integration within the framework of the FIT spatial discretization. Unfortunately, the numerical dispersion error of this algorithm is large along the beam propagation axis. Contrary to this, the proposed methods have a minimal error, vanishing for the Courant time step, along this direction. This property allows for a longer simulation time and for more accurate field solutions in accelerator structures.The two sets of equations are coupled through the total charge and current q j , which are carried in time and space by the system of charged particles. Frequenz 59 (2005) 9-10 Brought to you by | University of Arizona Authenticated Download Date | 5/30/15 8:34 AM

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We find a manifestly N=3 supersymmetric generalization of the four-dimensional Euler-Heisenberg (four-derivative, or F 4 ) part of the Born-Infeld action in light-cone gauge, by using N=3 light-cone superspace.