Operational Costs
Mostrando 37-48 de 269 artigos, teses e dissertações.
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37. The NoBLOCK Technology A Major Breakthrough in Wet High Intensity Magnetic Separation (WHIMS)
Since its introduction in 1963 by G.H. “Jones”, WHIMS MS has proven to be, worldwide, a major technology for separating several types of ore fines from their contaminants. Unfortunately, despite its superb characteristics, even if the best operational procedures are followed, one main issue lasts. It is the blocking of the matrix gaps by oversized partic
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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38. Biodiesel production through non-catalytic supercritical transesterification: current state and perspectives
The inconveniences of the conventional method for biodiesel production by alkaline catalysis suggests research towards alternative methods, with the non-catalytic transesterification using an alcohol at supercritical conditions proposed as a promising technique for biodiesel production. The so-called supercritical method (SCM) has powerful advantages over co
Braz. J. Chem. Eng.. Publicado em: 2014-06
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39. Superando el síndrome del "enemigo externo" en una firma autopartista a través del kaizen
Two problems in an autoparts firm are initially attributed to uncontrollable external factors ("external enemy" syndrome). This situation motivates the design of a methodology to guide kaizen event practices, supported by kaizen philosophy and methodology. The methodology consist of three steps: the first step, initiate, is designed to acquire employee commi
Prod.. Publicado em: 03/09/2013
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40. Improving the extraction conditions of endoglucanase produced by Aspergillus niger under solid-state fermentation
Production of cellulases under solid-state fermentation (SSF) is a promising technique that can help to reduce costs. Besides optimizing the production process, it is also important to consider enzyme recovery during the extraction step. Here, an experimental design methodology was used to investigate the effects of the operational parameters solid to liquid
Braz. J. Chem. Eng.. Publicado em: 2013-03
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41. Uma proposta de protocolo de codificação de libras para sistemas de tv digital.
Nowadays, the digital television systems do not have specific standards for sign languages (SL). The solution used in TV is to transmit a window with a SL interpreter over the video program. This solution is ineffective in several aspects: it has high operational costs, is dependent of a interpreter, and distract nondeaf viewers. In addition, it does not res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2012
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42. Otimização na alocação dinâmica de veículos no transporte rodoviário de cargas completas entre terminais
The domain of logistics is concerned with providing customers with the right product in the right place at the right time. In our modern economy, the faster pace and wider scope of logistic operations has led to complex management problems that have drawn the attention of both industry and the academic world Optimizing the number of vehicles for a determined
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2012
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43. Avaliação dos pontos de apoio (ecopontos) na gestão dos resíduos sólidos urbanos: estudo de caso de São José do Rio Preto - SP
The use of Support Points (AP), also known as Eco points, the integrated management of municipal solid waste (MSW) has occurred in different cities of the world and in Brazil, such practice is spreading, albeit slowly. The prospect is that such use contributes to a better management of MSW. It is necessary, however, to monitor and evaluate these procedures t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/05/2012
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44. Proposta de um modelo em programação linear para a solução de problemas de sistemas produtivos job shop com setup dependentes da sequência / Proposal of a linear programming model for solving problem systems job shop production with setup times sequence-dependent
Sequencing problems are very common, they happen every time there is a choice regarding the order in which several tasks can be performed. The business can be an airline, a hotel, a computer manufacturer or a university; these issues are part of their routine. The application of the sequencing techniques allows, for example, reducing the costs and fastening
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
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45. Compromisso com o graduar-se, com a instituição e com o curso : estrutura fatorial e relação com a evasão / Goal, institutional and course commitment : factor structural and dropout relation
Vincent Tinto, in his theoretical model of dropout from higher education, proposes that the student not integrated in the academic and social systems in college environment could have a level of goal and institutional commitments affected, which may lead to the dropout decision. The commitments represent an analyze that the students perform about the costs a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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46. Micro-turbine design point definition using optimization techniques
During a gas turbine development phase an important engineer task is to find the appropriate engine design point that meet all required specifications. This task can be very arduous because all possible operating points in the gas turbine operational envelope need to be analyzed, for the sake of verification of whether or not the established performance migh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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47. Alternativas de tratamento da água de lastro em portos exportadores de minério de ferro. / Ballast water treatment alternatives in the iron ore ports exporting.
This thesis aims at making a technical and economic analysis of the ballast water treatment in Brazilian iron ore ports. Three distinct treatment alternatives were studied: (1) onshore ballast water treatment; (2) water desalination plant to ballast water treatment; (3) onboard ballast water treatment in shuttle tanker vessels operating in the mooring, where
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/03/2012
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48. Ultraviolet radiation disinfection: study of process performance and economic evaluation / Desinfecção por radiação ultravioleta: estudo do desempenho do processo e avaliação econômica
This work studied UV disinfection process performance and economic costs for facultative stabilization ponds effluent pos treated in constructed wetland and another effluents with similar characteristic. The experimental work consisted of batch disinfection tests using UV reactor, evaluating variables that may affect performance and process costs in order to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012