Slot/pole Combinations Choice for Concentrated Multiphase Machines dedicated to Mild-Hybrid Applications

Version de l'éditeur à l'adresse suivante : http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6119910&isnumber=6119266This paper presents multiphase permanent magnet machines with concentrated non-overlapped winding as a good candidate for automotive low voltage mild-hybrid applications. These machines often require a trade-off between low speed performances such as high torque density and high speed performances like flux weakening capabilities. This paper describes how to choose a key design parameter to ease this compromise, the slots/poles combination, according to three parameters: winding factor including harmonics factor, rotor losses amount thanks to a comparison factor and radial forces balancing. The comparison criterion are based on both analytical formula and Finite Element Analysis.Projet MHYGALE/ ADEM

REVISION OF THE MALES OF THE Hydrospyche scalaris GROUP IN NORTH AMERICA (TRICHOPTERA: HYDROPSYCHIDAE)

The genus Hydrospsyche Pictet sensu stricto in North America is divided into three species groups, the Hydrospyche cuanis Ross Group Ross, the Hydropsyche depravata Hagen Group Ross, and the Hydropsyche scalaris Hagen Group Banks. Thirty-one of thirty-six described species are recognized in the Hydropsyche scalaris Group. Examination of adult males resulted in 5 junior subjective synonyms and one possible new species based on a single exemplar from Sevier County, Utah. Hydropsyche bidens Ross 1938, H. orris Ross 1938, and H. alvata Denning 1949 are junior synonyms of Hydropsyche incommoda Hagen 1861. Hydrospyche rossi Flint, Voshell and Parker, 1979 and H. fenestra Lago and Harris 2006 are junior synonyms of H. simulans Ross 1938. A key to the adult males is provided and intraspecific variation illustrated. Scanning electron microscopy, cross-sectioned material, careful hand dissections, and a summary of relevant literature were used to formulate a revised description of phallic morphology. The phallobase forms the copulatory organ with the endotheca indistinguishable. The sclerotized, non-eversible, internal atrium of Hydropsyche s.s. is considered phallicata based on the presence of internal longitudinal muscle and its attachment points. Parameres and endophallus are absent. Conflicting and supporting evidence for alternative interpretations of the phallic apparatus is considered

On 2 February 2012, the commercial plant producing radiopharmaceuticals in Poland, developed by Synektik SA, was officially opened at Świętokrzyskie Center of Oncology in Kielce

On 2 February 2012, Synektik SA Group officially launched theradiopharmaceuticals production in a facility which will serve thecommercial market. The project finished the two-years’ investmentby the Company which cost PLN 19 million

Inspired Design: Using Interdisciplinarity And Biomimicry For Software Innovation

This thesis presents research and proposes a framework for increasing the breadth and depth of interdisciplinary knowledge in the field of computer science. The intent is to address an increasing problem of complexity in software and computing systems. The approach is to equip software developers and computer scientists with a contextual perspective and a set of strategies for injecting innovation and creativity into the solutions they design by leveraging knowledge and models outside the traditional realm of computer science. A review of current and historical forms of interdisciplinarity and biomimicry are presented to build that context. The strategies presented include interdisciplinary education, interdisciplinary collaboration, interdisciplinary tools, biomimetic design, and the creation of new pattern languages based on nature\u27s design solutions. Each of these strategies stems from and leads to an open exchange of knowledge across disciplinary boundaries. When taken together, the knowledge and strategies presented are intended to inspire and foster a paradigm that recognizes the value of human and natural diversity as a source of innovation

Effects of a Cued Break and Stretch Program On Computer Use Productivity and Hand Or Wrist Pain

Problem Computer usage is commonplace in today\u27s workplace environment. Over time, employees who use computer keyboards greater than six hours per day, five days per week risk developing a repetitive motion injury of the hands or wrists (U.S. Department of Labor, 2009). Could a computer program that cues a break and stretch activity every two hours increase stretching at the workstation, create a workplace environment of positive productivity and ultimately decrease hand or wrist pain? The population understudy is computer users, using an intervention a break and stretch computer program, for one month, with outcomes measured through pre and post questionnaires using the same group for comparison. Purpose The purpose of the capstone project was to examine the effects as defined above of an audio and visual computer program intervention that reminded employees using keyboards more than six hours per day, five days per week to break and stretch every two hours

Felt with the Heart: A Domestic Student’s Journey with International Students

No matter the country of destination, international students are well documented for their extra challenges they face as university students. Over the years both successful students and challenged students have been studied as to why they struggle. This Honors thesis is meant to document the perspective of a domestic student who lived and worked with mostly undergraduate international students for over three years

Strong Effects of Cation Vacancies on the Electronic and Dynamical Properties of FeO

We report pronounced modifications of electronic and vibrational properties induced in FeO by cation vacancies, obtained within density functional theory incorporating strong local Coulomb interactions at Fe atoms. The insulating gap of FeO is reduced by about 50% due to unoccupied electronic bands introduced by trivalent Fe ions stabilized by cation vacancies. The changes in the electronic structure along with atomic displacements induced by cation vacancies affect strongly phonon dispersions via modified force constants, including those at atoms beyond nearest neighbors of defects. We demonstrate that theoretical phonon dispersions and their densities of states reproduce the results of inelastic neutron and nuclear resonant x-ray scattering experiments \emph{only} when Fe vacancies and Coulomb interaction $U$ are both included explicitly in \emph{ab initio} simulations, which also suggests that the electron-phonon coupling in FeO is strong.Comment: 5 pages, 4 figure

Grid-enhanced X-ray coded aperture microscopy with polycapillary optics

Polycapillary devices focus X-rays by means of multiple reflections of X-rays in arrays of bent glass capillaries. The size of the focal spot (typically 10–100 $\mu$ m) limits the resolution of scanning, absorption and phase-contrast X-ray imaging using these devices. At the expense of a moderate resolution, polycapillary elements provide high intensity and are frequently used for X-ray micro-imaging with both synchrotrons and X-ray tubes. Recent studies have shown that the internal microstructure of such an optics can be used as a coded aperture that encodes high-resolution information about objects located inside the focal spot. However, further improvements to this variant of X-ray microscopy will require the challenging fabrication of tailored devices with a well-defined capillary microstructure. Here, we show that submicron coded aperture microscopy can be realized using a periodic grid that is placed at the output surface of a polycapillary optics. Grid-enhanced X-ray coded aperture microscopy with polycapillary optics does not rely on the specific microstructure of the optics but rather takes advantage only of its focusing properties. Hence, submicron X-ray imaging can be realized with standard polycapillary devices and existing set-ups for micro X-ray fluorescence spectroscopy

Balancing Selfishness and Efficiency in Mobile Ad-hoc Networks:An Agent-based Simulation

We study wireless ad-hoc networks from an agent-based perspective. In our model agents with different strategies such as being selfish, tit-for-tat or battery-based compete and cooperate. If only different levels of selfishness are allowed then being selfish is clearly the dominant strategy. However, introduction of more advanced strategies allows to some extent to combat selfishness. In particular we present a battery-based approach and a hybrid of battery-based and tit-for-tat approaches. The findings give hope that the introduction of widely available ad-hoc networks might at some point be possible. Even when users are given full control of their devices, effective strategies allow for the networks overall to be effective and feasible