Propellers
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. A Oligarquia Desvendada: Organização e Estrutura dos Partidos Políticos Brasileiros
RESUMO O presente artigo foca na organização e estrutura interna dos partidos políticos brasileiros, a partir de uma abordagem institucionalista tradicional, uma vez que se busca compreender como um conjunto específico de regras (estatutos partidários) pode afetar a comunidade de atores (partidos, lideranças partidárias, filiados) e as relações entr
Dados. Publicado em: 09/09/2019
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2. Nanoestrutura de CdS: propriedades estruturais, eletrônicas e oxidação
CdS nanostructures form different shapes, with potential applications in solar cells, optical and mechanical devices. The presence of oxygen in nanostructures of these materials can be useful for obtaining new forms such as propellers, as well as for the construction of high performance devices as regards grinding. In this work, we made initially a comparati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/08/2012
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3. Proposta e aplicação do método das hélices na identificação de estudantes talentosos
The issue of identification is the major factor in an enrichment program to gifted students, because it determines which students will be attended and the criteria used in the identification process. The objective was to develop a method capable of providing a probabilistic interpretation to identify talented students from Renzullis three rings conception. T
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2012
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4. Análise de desempenho e ruído de hélices de mínima perda de energia / Analysis of performance and noise of propellers minimum energy loss
Revisa os métodos para cálculo de desempenho e ruído de hélices. Apresenta um método para determinação de desempenho de hélices com mínima perda de energia usando a teoria dos vórtices. Faz uso das tabelas de Goldstein que criam automaticamente a geometria da hélice através do acesso a um banco de dados aerodinâmico. Avalia o ruído harmônico c
Publicado em: 2009
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5. Controle por modos deslizantes aplicado a sistema de posicionamento dinâmico. / Sliding mode control applied to dynamic positioning systems.
This paper presents the application of the robust and nonlinear sliding mode control theory to the dynamic positioning systems for floating vessel, with experimental validation. The objective of the control system designed is to keep the vessel next a specific position (set-point) or follow a pre-defined trajectory (pathfollowing) through the action of prope
Publicado em: 2009
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6. Dynamic analysis of a cantilever beam excited by a non ideal source / Análise dinâmica de uma viga engastada excitada por uma fonte não ideal
Studies about the dynamic behaviour of nonlinear structures have been to this date subject of extensive research all around the world. Since the beginning of the development of the nonlinear oscillation theory one has tried to understand the basic mechanisms, like disruptions that would cause complex answers on flexible structures. This paper presents a theo
Publicado em: 2009
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7. Mestres e seus aprendizes: um estudo de caso sobre a aprendizagem individual de operários da área de produção de uma indústria química
This dissertation had the objective of studying individual learning at organizations. The aim was to investigate how the learning processes of the shop floor activities are at the company where the research was carried out. The general objective was related to the comprehension of the learning process and the professional paths of a group of employees in the
Publicado em: 2009
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8. Effect of mixing mode on the behavior of an ASBBR with immobilized biomass in the treatment of cheese whey
A hydrodynamic study of a mechanically stirred anaerobic sequencing batch biofilm reactor (ASBBR) containing immobilized biomass on polyurethane foam was performed with the aim to determine homogeneity of the reactor based on total mixing time. Turbine or helix propellers were used for stirring at rotor speeds of 100, 200, 300 and 500 rpm. Experimental value
Brazilian Journal of Chemical Engineering. Publicado em: 2008-06
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9. Desenvolvimento de sistema de sensoriamento de posição e atuação para posicionamento dinâmico de modelos reduzidos em tanque de provas. / Development of both sensing and actuation infra-structure for the performance evaluation of Dynamic Positioning Systems for reduced scale model of ships in towing tanks or offshore tanks.
The main objective of this work is the development of both sensing and actuation infra-structure for the performance evaluation of Dynamic Positioning Systems for reduced scale model of ships in towing tanks or offshore tanks. It describes the conception, design, implementation and tests of a range and orientation sensor system, as well as the hardware of th
Publicado em: 2005
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10. Aplicação de resultados de escala real no projeto de hélices de embarcações fluviais. / Full scale measurements results applied on propeller design for inland ships.
This work shows the results of a series of measurements of propulsive performance of a push-tow in the Araguaia river, with a 448kW twin-screw pusher and two 530t barges. During the measurements the pusher was fitted with two different types of propellers: firstly with a more conventional B-Troost one and later with a Kaplan ducted propeller. The full scale
Publicado em: 1997
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11. Effect of Aluminium and Alumina on the Lung in Grinders of Duralumin Aeroplane Propellers
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12. Peptide-in-groove interactions link target proteins to the β-propeller of clathrin
The “WD40” domain is a widespread recognition module for linking partner proteins in intracellular networks of signaling and sorting. The clathrin amino-terminal domain, which directs incorporation of cargo into coated pits, is a β-propeller closely related in structure to WD40 modules. The crystallographically determined structures of complexes of the
The National Academy of Sciences.