1,427 research outputs found

    Efficiency of low power audio amplifiers and loudspeakers

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    Perceptions of student affairs and services practitioners in Ontario’s post-secondary institutions: An examination of colleges and universities

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    Student affairs and services divisions and the partnerships and collaborations in which they engage with faculty, students, and the community form the structural centre of institutions’ approaches to student support. Although past research has identified areas typically associated with the student affairs and services portfolio and factors that influence the organizational structure, little is known about how staff perceive their institutions’ organizational structures relative to supporting student success. The purpose of this study was to understand student affairs and services staff members’ perceptions of the role organizational structure plays in their day-to-day work supporting student success in colleges and universities in Ontario. Although staff commented on their institutions’ formal organizational structures (referring to titles, reporting lines, and breadth of portfolio), their comments focused more specifically on how they saw the nature of their work and changes they have experienced in supporting student success as student bodies become more diverse.  Les divisions des services aux Ă©tudiants et des affaires Ă©tudiantes, de mĂȘme que les partenariats et collaborations qu’elles forment avec la facultĂ©, les Ă©tudiants et la communautĂ© façonnent le centre structurel des approches des Ă©tablissements envers le soutien des Ă©tudiants. Bien qu’une prĂ©cĂ©dente recherche ait identifiĂ© des domaines typiquement associĂ©s au dossier des affaires Ă©tudiantes et des services aux Ă©tudiants, ainsi qu’à des facteurs qui influencent la structure organisationnelle, on n’en sait pas beaucoup quant Ă  la perception du personnel de ces Ă©tablissements envers les structures organisationnelles de leur Ă©tablissement et leur façon d’appuyer la rĂ©ussite des Ă©tudiants. L’objet de cette Ă©tude Ă©tait de comprendre les perceptions du personnel des affaires Ă©tudiantes et des services aux Ă©tudiants envers le rĂŽle de la structure organisationnelle dans leur travail quotidien de soutien Ă  la rĂ©ussite des Ă©tudiant(e)s des collĂšges et universitĂ©s de l’Ontario. Bien que le personnel ait formulĂ© des remarques sur les structures organisationnelles de leur Ă©tablissement (les titres, les liens hiĂ©rarchiques et l’ampleur des services offerts), leurs commentaires ont ciblĂ© plus prĂ©cisĂ©ment leur perception quant Ă  la nature de leur travail et les changements qu’ils ont subi en appuyant la rĂ©ussite des Ă©tudiants en raison d’une population Ă©tudiante de plus en plus diversifiĂ©e

    An optimized tuned mass damper/harvester device

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    Much work has been conducted on vibration absorbers, such as tuned mass dampers (TMD), where significant energy is extracted from a structure. Traditionally, this energy is dissipated through the devices as heat. In this paper, the concept of recovering some of this energy electrically and reuse it for structural control or health monitoring is investigated. The energy-dissipating damper of a TMD is replaced with an electromagnetic device in order to transform mechanical vibration into electrical energy. That gives the possibility of controlled damping force whilst generating useful electrical energy. Both analytical and experimental results from an adaptive and a semi-active tuned mass damper/harvester are presented. The obtained results suggest that sufficient energy might be harvested for the device to tune itself to optimise vibration suppression

    Reply to “Comment on ‘Electron-induced bond breaking at low energies in HCOOH and glycine: The role of very short-lived σ anion states’ ”

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    Rescigno et al. [Phys. Rev. A 80, 046701 (2009)] criticized our theoretical treatment of dissociative electron attachment in formic acid in which we show that this process can be explained by electron attachment into the temporary negative ion state formed by occupation of the σ*(OH) orbital. We argue that their objections do not hold up to scrutiny

    Reply to “Comment on ‘Electron-induced bond breaking at low energies in HCOOH and glycine: The role of very short-lived σ anion states’ ”

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    Rescigno et al. [Phys. Rev. A 80, 046701 (2009)] criticized our theoretical treatment of dissociative electron attachment in formic acid in which we show that this process can be explained by electron attachment into the temporary negative ion state formed by occupation of the σ*(OH) orbital. We argue that their objections do not hold up to scrutiny

    Meth­yl(phen­yl)phosphinic acid

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    The crystal structure of the title compound, C7H9O2P, displays O—H⋯O hydrogen bonding , which links individual mol­ecules related via the c-glide plane and translational symmetry along the crystallographic b-axis direction into continuous chains

    An experimental and theoretical study of transient negative ions in Mg, Zn, Cd and Hg

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    A range of experimental and theoretical techniques have been applied to the study of transient negative ions (resonances) formed in electron scattering from the Group II metals Mg, Zn, Cd, and Hg at incident electron energies below the first ionization potential. A wealth of resonance structures have been observed and from the experimental observations and theoretical information, classifications are proposed for some of these negative ion states
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