Operation Research
Mostrando 1-12 de 605 artigos, teses e dissertações.
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1. The environment in Petrobrás magazine (1961-1979): Meaning mobilized by corporate discourse
Abstract Purpose This study analyzes the ideological constructions of Petrobras’ corporate environmental discourse during the period from 1961 to 1979. Theoretical framework The paper uses Thompson’s (2011) critical conception of ideology, specifically its modes of operation and strategies of symbolic construction. Design/methodology/approach The stud
Revista Brasileira de Gestão de Negócios. Publicado em: 2023
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2. Operating Model and Estimation of the Insurance Premium for an Energy Futures Clearing House in Brazil
Abstract Purpose We propose and analyze a new operating model for an energy futures exchange that could be implemented in Brazil, where there is low liquidity for these contracts. The clearing house temporarily assumes the position of customers who fail to answer the margin call, instead of closing the position, as would normally be done under normal condit
Revista Brasileira de Gestão de Negócios. Publicado em: 2023
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3. DESIGN AND EXPERIMENT OF SELF-PROPELLED SYSTEM FOR PADDY FIELD WEEDER BASED ON THE INTERACTION MECHANISM OF WHEEL-SOIL
ABSTRACT Aiming at the low mechanization of paddy field weeding and lack of dedicated agricultural machinery for paddy field weeding in China, a self-propelled system of paddy field weeding machine was designed. The overall structure and working principle of self-propelled system were illustrated and analyzed. The interaction mechanism of wheel-soil during w
Engenharia Agrícola. Publicado em: 2022
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4. TEST OF THE SCREENING AND PARAMETER OPTIMIZATION OF SWING SEPARATION SIEVE IN FIELD OPERATION
ABSTRACT The need for clarity regarding the sieving characteristics of the potato-soil mixture, as provided by the swing separating sieve of a potato digger, as well as the derived problems of low potato transportation efficiency, a high potato damage rate and low potato unearthing rate, are the main reasons for this study. Dynamic tracking technology is pro
Engenharia Agrícola. Publicado em: 2022
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5. Editorial Comment: Combination therapy in overactive bladder-untapped research opportunities: A systematic review of the literature
ABSTRACT Purpose: To describe our experience in the management of retained encrusted ureteral stents using a single session combined endourological approach. Materials and Methods: Patients with retained encrusted ureteral stents who had been submitted to a single session combined endourological approach from June 2010 to June 2018 were prospectively evalu
Int. braz j urol.. Publicado em: 2021-06
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6. EFFECT OF THE DOWNWASH FLOW FIELD OF A SINGLE-ROTOR UAV ON DROPLET VELOCITY IN SUGARCANE PLANT PROTECTION
ABSTRACT Protecting against the main sugarcane diseases and insect pests requires good control at the base of the plant; therefore, higher droplet penetration is required during plant protection. The objectives of this research were to explore the movement mechanism of droplets in a sugarcane protection operation using a single-rotor unmanned aerial vehicle
Eng. Agríc.. Publicado em: 2021-04
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7. Escalonamento de tecnologias: desenvolvimento de produto e processo do laboratório à escala piloto conectado ao mercado (parte 1)
In this article, it is described the main aspects to be considered during the process of scaling up hard sciences technologies developed in the Science and Technology Institutes aiming at industrial application. Based on the experience of our group in scaling up, pre-acceleration, and acceleration of different technologies, a methodology was developed and di
Quím. Nova. Publicado em: 2021-03
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8. Reforming theory of planned behavior to measure money management intention: a validation study among student debtors
Abstract Purpose This study aims to validate the money management intention screening questionnaire under the framework of theory of planned behavior, which includes attitude, subjective norms, perceived behavioral control and intention. Design/methodology/approach A total of 919 undergraduate students with loans were randomly selected and grouped into fou
RAUSP Manag. J.. Publicado em: 2021-03
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9. Efficiency of credit unions in Brazil: an analysis of the evolution in financial intermediation and banking service
Abstract Purpose The purpose of this paper is to evaluate the efficiency in financial intermediation and the cost efficiency in banking service of credit unions in Brazil, based on essentially accounting variables, and to analyze the temporal evolution of the efficiency of these cooperatives. Design/methodology/approach With a sample of 315 cooperatives ov
RAUSP Manag. J.. Publicado em: 2020-09
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10. Erratum
Abstract Bauxite mining has been carried out around Poços de Caldas, Minas Gerais, since the 1940s. Companies operating in the region pioneered land rehabilitation in Brazil, conducted since the early 1980s. Different procedures of recontouring, runoff drainage, soil preparation and vegetation planting were employed. This research aims to evaluate current e
REM, Int. Eng. J.. Publicado em: 2020-06
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11. Evaluation of environmental rehabilitation practices in bauxite mining at the plateau of Poços de Caldas
Abstract Bauxite mining has been carried out around Poços de Caldas, Minas Gerais, since the 1940s. Companies operating in the region pioneered land rehabilitation in Brazil, conducted since the early 1980s. Different procedures of recontouring, runoff drainage, soil preparation and vegetation planting were employed. This research aims to evaluate current e
REM, Int. Eng. J.. Publicado em: 2020-06
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12. The discourse and coordination among advocacy coalitions: the case of Belo Monte
Abstract Purpose This study aims to analyze the use of discourse to solve issues related to coordination between advocacy coalitions in processes of gradual and transformative institutional change related to public policies. Design/methodology/approach Theoretical background is based on the advocacy coalition framework (ACF), new discursive institutionalis
RAUSP Manag. J.. Publicado em: 2020-03