9,325 research outputs found
An Improved Method for Obtaining Small Pressed Powder Pellets for the Analysis by XRF
A rapid, very low cost of instrumentation and simple approach to specimen preparation for the analysis by X-ray fluorescence spectrometry is presented. This technique requires a few mg of powdered samples, which are compressed to produce pellets. This procedure is employed for determining major, minor and trace elements in muscovites and K-feldspars. Factors affecting measured intensities, such as particle size and distribution, surface texture, pelletizing pressure, etc, are considered. A description of the new sample preparation device, including technical characteristics, is also given. It is demonstrated that suitable specimen presentation to the X-ray beam is obtained by using our procedure.Fil: D`angelo, JosĂ© Alejandro. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - San Luis. Instituto de QuĂmica de San Luis. Universidad Nacional de San Luis. Facultad de QuĂmica, BioquĂmica y Farmacia. Instituto de QuĂmica de San Luis; ArgentinaFil: Strasser, Edgardo. Universidad Nacional de San Luis. Facultad de QuĂmica, BioquĂmica y Farmacia; ArgentinaFil: Marchevsky, Eduardo Jorge. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - San Luis. Instituto de QuĂmica de San Luis. Universidad Nacional de San Luis. Facultad de QuĂmica, BioquĂmica y Farmacia. Instituto de QuĂmica de San Luis; ArgentinaFil: Perino, Ernesto. Universidad Nacional de San Luis. Facultad de QuĂmica, BioquĂmica y Farmacia; Argentin
Thermal analysis of induction and synchronous reluctance motors
In this paper, the thermal behavior of two induction motors (2.2 and 4 kW, four poles) and two synchronous reluctance motors [(SynRMs) transverse-laminated] are investigated and compared. Both motor types use the same stator but have different rotors. Using a lumped-parameter simulation program, a thermal analysis has been also carried out, and the obtained results have been compared with the experimental ones. A direct comparison of the thermal behavior of the two motor types has thus been made for constant load and constant average copper temperature conditions. Inasmuch as the SynRM has negligible rotor losses compared with the induction motor, it is capable of a larger rated torque, from 10% to more than 20%, depending on the relative size of end connections and motor lengt
Heideggers Kunstwerkaufsatz in mehrstimmiger Perspektive
Review to: David Espinet, Tobias Keiling (Hrsg.), Heideggers Ursprung des Kunstwerks. Ein Kooperativer Kommentar, Frankfurt am Main: Klostermann Verlag, 201
LA EXPERIENCIA DE LA CORPORALIDAD EN IMĂGENES. PERCEPCIĂN DEL MUNDO, PRODUCCIĂN DE SENTIDOS Y SUBJETIVIDAD
Este artĂculo parte de la doble dimensiĂłn que desde la antropologĂa y la sociologĂa se reconoce al cuerpo como receptor y productor de significados culturales. El interĂ©s del mismo es reflexionar sobre el efecto de las imĂĄgenes mediĂĄticas en la corporalidad en las sociedades contemporĂĄneas. La doble dimensiĂłn se traslada, para el anĂĄlisis que aquĂ nos interesa, al cuerpo representado y al cuerpo perceptor de su propia imagen, espejada en otros cuerpos. A los fines de este trabajo, considerarĂ© los modos en que se asienta la relaciĂłn de los sujetos con la corporalidad a partir de y a travĂ©s de la imagen: a) el cuerpo como lugar de la experiencia perceptiva del mundo; b) el cuerpo como lugar de producciĂłn de sentidos sobre las imĂĄgenes de otros cuerpos; y c) el sujeto frente a las imĂĄgenes de su propio cuerpo
Exploring Partnerships Between Embedded Providers and Faculty-Led Study Abroad Program Directors
This research reveals the sentiments of faculty about the perceived support structures and barriers in place for them to develop new international education outbound student mobility programs on US campuses with third party providers embedded within the education abroad office. This increasingly attractive partnership model is unique in the field for the multitudinous collaboration that it employs. Data was collected through three separate surveys and a series of interviews. The sample totaled 26 faculty and over 330 students responding to the surveys and an additional fifteen faculty interviewees, the research suggests establishing some tools and venues for faculty and international education staff to better engage cooperatively in the process of campus internationalization.
Keywords: faculty engagement, education abroad, collaboration, internationalizatio
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