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تعداد نتایج: 16896028 فیلتر نتایج به سال:
in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
This paper investigates the gendered dynamics of informal recycling in Buenos Aires, Argentina at a moment transition governance this work. I argue that there is strong gender binary apparent type work, and public nature can exacerbate crisis social reproduction experienced by many women recyclers through inviting interventions into their research based on an extensive survey series interviews ...
How wages and non labor income affect the decisions to work and hours of work are critical for understanding the work disincentive effects of taxes and transfers, and the attendant design of optimal income tax and transfer schemes. I use data from the Current Population Survey and variation induced by fundamental reforms to the U.S. tax and welfare systems in recent decades to estimate the labo...
Significant declines in seagrass coverage have occurred in many parts of the world. In recent decades, transplanting projects for seagrass restoration at die-off areas have been attempted, but most current seagrass transplanting techniques are cost and labor intensive. We have developed a new seagrass transplanting method in which oyster shells are used as an anchoring device, and does not requ...
Migrant farm workers play an essential role in the planting and harvesting of crops in our agricultural production system. In the United States today, about 6 percent of the paid farm labor force "follow the crops" across the nation. This article reports on the economic and health care needs of migrant farm workers who travel from the border areas of Texas to Wisconsin each year. Surveys conduc...
teachers beliefs have usually been left unattended in the realm of educational research in iranian context. one of those beliefs which seems to impact teachers performance in the classroom is their sense of self-efficacy, which refers to teachers belief in their ability to enhance student achievement and in bringing about positive learning outcomes. the present study aimed to investigate the pr...
this study aimed to investigate the effects of listening strategy training on iranian efl learners listening comprehension and use of such strategies. this work, employing an experimental methodology, was conducted among 60 adult efl learners from a language institute in isfahan, iran, as participants. the participants, who were selected based on the results of a placement test, were assigned t...
abstract over the past two decades, applied linguists and language teachers have shown a great deal of interest in genre-centered approaches , mainly because of pedagogic concerns . this has been due to the need to help non-native readers enhance their ability to understand academic and scientific texts. following swales’ (1981) works on genre analysis, studies of different sections of resear...
Case Description- Umbilical hernia is occasionally seen with different levels of complexity in animals This emergency condition requires quick diagnosis and is corrected with various surgical approaches. The aim of this paper is to report the surgical correction of an eviscerated umbilical hernia with extensive adhesion in a bovine calf. Twenty days old indigenous male bovine c...
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