Results 21 to 30 of about 3,368 (119)
SISTEMAS MECANIZADOS PARA IMPLANTAÇÃO DE FLORESTA. I. GRADE ARADORA E ARADO DE DISCOS
Revista do Instituto Florestal, 1999 Em solo Podzólico Vermelho Amarelo do campus da Universidade Federal de Santa Maria, Estado do Rio Grande do Sul, contendo 41,2% de areia fina, 23,8% de areia grossa, 6,6% de argila e 2,5% de matéria orgânica, instalou-se um experimento com o objetivo ...
Jair Rosas da Silva, Nilson Salvador
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Compactação de um latossolo vermelho causada pelo tráfego do "forwarder" [PDF]
Revista Árvore, 2003 A mecanização tem sido, atualmente, um poderoso instrumento para suprimento das necessidades da indústria agroflorestal, estando presente nos processos de produção, colheita e transporte florestal.
Haroldo Carlos Fernandes +1 more
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Application of Some Artificial Intelligence Techniques in Induction Motor Fault Diagnosis
Eletrônica de Potência, 2011 In spite of the advantages of the use of the induction motor in a large number industrial applications, various stresses natures like thermal, electrical, mechanical or environmental could affect the life span of this induction motor drive.
Edison R. C. da Silva +4 more
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Ac Drive Systems Using Reduced Four-leg Converter Supplying Independently Two Induction Machines
Eletrônica de Potência, 2007 This paper presents six reduced switch count ac drive systems. These configurations have been conceived to operate with a four-phase and a three-phase or with a four-phase and a two-phase induction machines in a series-connected scheme.
Euzeli C. dos Santos Jr. +2 more
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Finite Element Error Analysis of a Viscoelastic Timoshenko Beam with Thermodiffusion Effects
Mathematics, 2023 In this paper, a thermomechanical problem involving a viscoelastic Timoshenko beam is analyzed from a numerical point of view. The so-called thermodiffusion effects are also included in the model. The problem is written as a linear system composed of two
Jacobo G. Baldonedo +3 more
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A STEADY-STATE APPROACH TO PREVENT VOLTAGE COLLAPSE IN POWER SYSTEM
Ingeniería, 2013 This paper presents a steady state approach to prevent voltage collapse in a power system. The power system operation close to stability boundaries is an important factor which may lead to voltage instability conditions.
Jairo Quirós Tortós +1 more
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Clean Technologies, 2022 The seasonal performance of a heat pump indicates its average performance during the heating and/or cooling season, taking into account the different energy demands and their variability over time.
Jaime Sieres +4 more
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Renaissance Studies, EarlyView.ABSTRACT During the fifteenth and sixteenth centuries, there was no statutory difference between cartography, drawing and painting. These activities were performed then by craftsmen who were part of a vast group under the umbrella of ‘mechanical arts’ and fell under the ‘artifex’ category. Artifex were experts in any particular art, whether a craftsman,
Vasco Medeiros
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INCREMENTO DEL MARGEN DE CARGABILIDAD DEL SISTEMA ELÉCTRICO NACIONAL
Ingeniería, 2011 Esta publicación presenta la aplicación de una metodología para incrementar el margen de cargabilidad del sistema eléctrico nacional, bajo la restricción de un colapso de tensión de largo alcance.
Jairo Quirós Tortós +1 more
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“The Future Is Ancestral”: The Environmental Cuir Utopias of Gabriela Cabezón Cámara
Future Humanities, Volume 4, Issue 1, May 2026.ABSTRACT Argentinian author Gabriela Cabezón Cámara identifies as a “socio‐environmentalist and writer” and has been actively involved in the feminist movement #NiUnaMenos since 2015, alongside her growing engagement with environmental activism. She advocates for Indigenous land rights, water accessibility, and challenges offshore petroleum extraction ...
Victoria Jara
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