1,335 research outputs found
Phase change and cooling characteristics of microjets measured using microcantilever heaters
No full textThis paper reports novel microcantilever metrology tools to investigate free microjets emanating from a micromachined nozzle of diameter 10 mu m. Microcantilevers with an integrated resistive heater-thermometer were used to study microjet cooling and phase change characteristics. While the microcantilever heater was aligned to and impinged upon by hydrocarbon microjets, the heater temperature was modulated by a constant voltage source. Successive heating and cooling cycles captured the microjet phase change hysteresis properties. When the microcantilever heater temperature was controlled, it was possible to construct a full boiling curve. Measurements were made on microjets of butane, hexane, and octane. The convective heat fluxes accompanied by microjet impingement boiling were 2.9-7.6 kW/cm(2) for heater temperatures of 25-350 degrees C. Overall, the techniques reported herein show promise for characterizing microscale jet flows. (C) 2008 Elsevier B.V. All rights reserved.
Ari naiz y ari dut
No full textSignificaciones del verbo "ari" en sus dos conjugaciones con "izan" y "ukan". Sugiere sustituír algunas locuciones incorrectas por "ari"Meanings of the verb "ari " in both its conjugations with "izan" and "ukan". The author suggests using some wrong expressions by "ari
Uma proposta de ensino de literatura a partir da obra do escritor alagoano Ari Denisson
No full textThis research is based on a qualitative investigation, of the action research type, which suggests that literature classes should study the life and work of the author Ari Denisson, a poet and short story writer from Maceió, with the aim of valuing talents from Alagoas and encouraging a taste for reading and literary production. The actions of this project took place in a public school in a first-year high school class in 2024 and focused on the poetic work “baroque.doc” and the narrative work “Contos Periféricos”. A six-hour teaching sequence culminated in the author's visit to the school and a round of questions from the students. The interview was preceded by analyses of the selected texts and a presentation of the author's biography. The expected result is a way of rescuing the culture of Alagoas and Maceió and a greater appreciation of literature in Portuguese language classes. The authors who are references for this research range from Cosson, Boal, Freire, Rojo, to Antunes, among others.A presente pesquisa baseia-se em uma investigação de cunho qualitativo, do tipo pesquisa-ação que sugere para as aulas de literatura o estudo da vida e obra do autor Ari Denisson, poeta e contista maceioense, no intuito de valorizar os talentos alagoanos e incentivar o gosto pela leitura e produção literária. As ações desse projeto se deram em uma escola pública numa turma do primeiro ano do ensino médio no ano de 2024 e focaram na obra poética “baroque.doc” e na obra narrativa “Contos Periféricos”. Uma sequência didática de seis horas-aula teve como culminância a visita do autor na escola e uma rodada de perguntas dos alunos. A entrevista foi precedida por análises dos textos selecionados e apresentação da biografia do autor. Espera-se como resultado uma forma de resgate da cultura alagoana e maceioense e uma maior valorização da literatura dentro das aulas de língua portuguesa. Os autores que são referências para esta pesquisa vão desde Cosson, Boal, passando por Freire, Rojo, até Antunes, dentre outros
The Afterlife of Ari Nohem
No full textThis chapter traces the circulation of Ari Nohem in manuscript, from its composition through its first appearance in print. The different stages in the reception of Ari Nohem in manuscript offer an alternative history of Kabbalah in the seventeenth and eighteenth centuries, one that has largely been told through the histories of Sabbatianism and Hasidism. The manuscript transmission of Ari Nohem was typical rather than aberrant for texts written by early modern Jewish intellectuals on a variety of subjects: polemical writings on Christianity, esoteric kabbalistic treatises, and epistolary campaigns against the mystical messiah Sabbatai Zevi and his followers. The evidence of these manuscripts, combined with repeated citation of and allusion to Ari Nohem in letters, diaries, treatises, responsa, and compendia composed between 1639 and 1840, indicate that Jews and Christians continued to read Modena's text in nearly every generation between the death of the author and the printing of his book.</p
Recommended from our members
Fluid velocity measurement by processing images of neutrally-buoyant, phosphorescent tracer particles
No full textA technique for measuring fluid velocities by means of neutrally-buoyant, phophorescent particles was investigated in a small-scale water jet facility. A nitrogen laser briefly illuminated the flow, exciting only those particles resident within the pulsed beam. The particles luminesce for a short while following excitation, during which time they also move with the flow. This creates a visible particle streak, the intensity of which decays along the direction of motion. A strobe illuminates the particles again a known time following the laser pulse. The magnitude and direction of a particle's velocity in the plane of view are deduced from an image of it streak captured by a video camera and recorded by a digital image processing system
Health consultation, Ari-Zonolite (aka Buster's School of Street Rods facility), Glendale, Maricopa County, Arizona
No full textabstract: This report evaluates the potential exposure pathways associated with vermiculite concentrate processing activities at the Ari-Zonolite facility. The site is located in the near downtown area of Glendale, approximately ½ mile from the city hall, downtown shops, and other buildings. The former Ari-Zonolite facility received vermiculite from the Libby, Montana, mine. From 1951 to 1964, the site was leased the site to the Ari-Zonolite Company. Following the removal of the vermiculite concentrate processing equipment in 1964, several businesses have occupied the site. None of these businesses were involved in vermiculite processing activities. The last occupant of the former vermiculite processing building was an automotive restoration business, which vacated the site in 2002.Under cooperative agreement with the Agency for Toxic Substances and Disease Registry, U.S. Department of Health and Human Services.Includes bibliographical references (p. 17-19)
Recommended from our members
Manipulation of a rectangular air jet using piezoelectric actuators
No full textAn air jet emanating from a rectangular conduit with exit plane dimensions 7.62 cm x 1.27 cm (aspect ratio 6:1) is forced using four piezoelectric actuators mounted along the long sides of the jet opening. Excitation is effected via amplitude modulation of the resonant carrier waveform. Although the flow is not normally receptive to excitation at the actuator resonance frequency, if the excitation amplitude is high enough, spreading of the forced segments of the jet shear layer can lead to a significant deflection of the jet column. When the amplitude modulated excitation is high enough, the input waveform is effectively demodulated by a nonlinear process related to the formation and coalescence of nominally spanwise vortices. The resulting effect is the spatial amplification and attenuation of the modulation and resonant wavetrains, respectively. The choice of different spatial/temporal wavetrains can result in the excitation of spanwise and streamwise instabilities of the jet column
The manipulation of instabilities in a natural convection boundary layer along a heated, inclined plate
No full textPh.D
Power Generation Using Buoyancy-induced Vortices
No full textVarious systems and methods are provided for power generation using buoyancy-induced vortices. In one embodiment, among others, a vortex generation system includes a nucleating obstruction; an array of vanes distributed about the nucleating obstruction, the array of vanes configured to impart an angular momentum on air drawn through the array of vanes to form a columnar vortex over the nucleating obstruction; and a set of turbine blades positioned over the nucleating obstruction, the set of turbine blades configured to extract power from the columnar vortex. In another embodiment, a method for power extraction from a buoyancy-induced vortex includes establishing a thermal plume; imparting angular momentum to boundary layer air entrained by the thermal plume to form a stationary columnar vortex; and extracting power from the stationary columnar vortex through turbine blades positioned within the stationary columnar vortex.Georgia Tech Research Corporatio
- …
