O Uso Do Gps Como Instrumento De Controle De Deslocamentos Din Micos De Obras Civis Aplica O Na Rea De Transportes
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O Uso Do Gps Como Instrumento De Controle De Deslocamentos Din Micos De Obras Civis Aplica O Na Rea De Transportes
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Author :
language : pt-BR
Publisher:
Release Date : 2004
O Uso Do Gps Como Instrumento De Controle De Deslocamentos Din Micos De Obras Civis Aplica O Na Rea De Transportes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Este trabalho apresenta o desenvolvimento de metodologia para avaliar a utilização do Sistema de Posicionamento Global (GPS) como ferramenta de pesquisa no estudo do comportamento dinâmico de obras viárias. Para ser caracterizado como um instrumento de medição, foi estudada a potencialidade de um método, que se fundamenta numa forma específica de coleta e processamento de dados GPS; análise dos resíduos resultantes do processamento da dupla diferença de fase e aplicação de análise espectral para filtragem de informações indesejáveis (multicaminhamento dos sinais GPS). A coleta envolve um oscilador eletro-mecânico, especialmente projetado, que permite calibrar as medidas de amplitude e freqüência das oscilações mensuráveis pela obra sob teste. Inúmeros experimentos foram realizados em ambientes de reflexões e difrações variáveis e com diversos tipos de receptores e antenas GPS. Alguns ensaios foram realizados utilizando, simultaneamente, equipamentos como transdutores de deslocamento, acelerômetros e estações totais. Comparando os resultados obtidos, mesmo com valores prescritos em normas e códigos, afirma-se que o GPS, sob o método de coleta de dados testado, é um instrumento confiável para detecção e caracterização do comportamento dinâmico de estruturas, apresentado confiabilidade para as medições realizadas, da ordem de décimos de milímetro. Quanto à detecção das freqüências, as mais baixas ficam comprometidas pela presença do multicaminhamento e as mais elevadas têm a detecção limitada pela máxima taxa de coleta dos receptores (Lei de Nyquist).
Medi Es De Deslocamentos Em Obras Civis De Grande Porte Com Gps
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Author : Ricardo Ernesto Schaal
language : pt-BR
Publisher:
Release Date : 1998
Medi Es De Deslocamentos Em Obras Civis De Grande Porte Com Gps written by Ricardo Ernesto Schaal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Este trabalho apresenta inicialmente a determinação de valores mais realísticos dos desvios padrão das coordenadas obtidas com a observação, em distâncias curtas, dos sinais da fase da portadora L1 do GPS. A partir de dezenas de observações foi possível introduzir uma metodologia que permite qualificar os resultados de uma observação GPS e é proposto um processo para minimizar os desvios sistemáticos nas medidas decorrentes do multicaminhamento. A determinação dos desvios padrão foi realizada mediante a realização de dezenas de observações em duas bases, dotadas de pilares com centragem forçada. Os resultados mostraram a viabilidade do uso do GPS no controle de deslocamentos horizontais, medidas de distâncias e, em condições adequadas de visibilidade da constelação de satélites, nas medidas de controle de alturas. A introdução de um parâmetro de análise dos resíduos do processamento permite qualificar os resultados de uma observação isolada e constatar o grau das interferências causadas pelo multicaminhamento dos sinais. A proposta de modificação dos dados originais de fase mostrou a viabilidade de recuperar observações realizadas em condições adversas. Os dados obtidos nos testes de carga do Viaduto Armênia mostraram que as edificações nas vizinhanças introduziram elevado grau de interferências e somente os resultados na ponte rodo-ferroviária foram mais consistentes com os resultados obtidos pelos métodos convencionais.
Shaping Technology Building Society
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Author : Wiebe E. Bijker
language : en
Publisher: MIT Press
Release Date : 1994-09-29
Shaping Technology Building Society written by Wiebe E. Bijker and has been published by MIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-09-29 with Science categories.
Building on the influential book The Social Construction of Technological Systems, this volume carries forward the project of creating a theory of technological development and implementation that is strongly grounded in both sociology and history. Technology is everywhere, yet a theory of technology and its social dimension remains to be fully developed. Building on the influential book The Social Construction of Technological Systems, this volume carries forward the project of creating a theory of technological development and implementation that is strongly grounded in both sociology and history. The 12 essays address the central question of how technologies become stabilized, how they attain a final form and use that is generally accepted. The essays are tied together by a general introduction, part introductions, and a theoretical conclusion. The first part of the book examines and criticizes the idea that technologies have common life cycles; three case studies cover the history of a successful but never produced British jet fighter, the manipulation of patents by a French R&D company to gain a market foothold, and the managed development of high-intensity fluorescent lighting to serve the interests of electricity suppliers as well as the producing company. The second part looks at broader interactions shaping technology and its social context: the question of who was to define "steel," the determination of what constitutes radioactive waste and its proper disposal, and the social construction of motion pictures as exemplified by Thomas Edison's successful development of the medium and its commercial failure. The last part offers theoretical studies suggesting alternative approaches to sociotechnologies; two studies argue for a strong sociotechnology in which artifact and social context are viewed as a single seamless web, while the third looks at the ways in which a social program is a technology.
Contemporary Linear Algebra
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Author : Howard Anton
language : en
Publisher: John Wiley & Sons
Release Date : 2002-09-02
Contemporary Linear Algebra written by Howard Anton and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-09-02 with Mathematics categories.
From one of the premier authors in higher education comes a new linear algebra textbook that fosters mathematical thinking, problem-solving abilities, and exposure to real-world applications. Without sacrificing mathematical precision, Anton and Busby focus on the aspects of linear algebra that are most likely to have practical value to the student while not compromising the intrinsic mathematical form of the subject. Throughout Contemporary Linear Algebra, students are encouraged to look at ideas and problems from multiple points of view.
Transit Capacity And Quality Of Service Manual
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Author : Transit Cooperative Research Program
language : en
Publisher: Transportation Research Board
Release Date : 2003
Transit Capacity And Quality Of Service Manual written by Transit Cooperative Research Program and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with History categories.
Accompanying CD-ROM contains full text of the manual, Microsoft Excel spreadsheets, and a library of related documents.
Urban Sustainable Mobility
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Author : Elisabetta Venezia
language : en
Publisher: FrancoAngeli
Release Date : 2011
Urban Sustainable Mobility written by Elisabetta Venezia and has been published by FrancoAngeli this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Political Science categories.
World Development Report 2018
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Author : World Bank Group
language : en
Publisher: World Bank Publications
Release Date : 2017-10-16
World Development Report 2018 written by World Bank Group and has been published by World Bank Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-16 with Education categories.
Every year, the World Bank’s World Development Report (WDR) features a topic of central importance to global development. The 2018 WDR—LEARNING to Realize Education’s Promise—is the first ever devoted entirely to education. And the time is right: education has long been critical to human welfare, but it is even more so in a time of rapid economic and social change. The best way to equip children and youth for the future is to make their learning the center of all efforts to promote education. The 2018 WDR explores four main themes: First, education’s promise: education is a powerful instrument for eradicating poverty and promoting shared prosperity, but fulfilling its potential requires better policies—both within and outside the education system. Second, the need to shine a light on learning: despite gains in access to education, recent learning assessments reveal that many young people around the world, especially those who are poor or marginalized, are leaving school unequipped with even the foundational skills they need for life. At the same time, internationally comparable learning assessments show that skills in many middle-income countries lag far behind what those countries aspire to. And too often these shortcomings are hidden—so as a first step to tackling this learning crisis, it is essential to shine a light on it by assessing student learning better. Third, how to make schools work for all learners: research on areas such as brain science, pedagogical innovations, and school management has identified interventions that promote learning by ensuring that learners are prepared, teachers are both skilled and motivated, and other inputs support the teacher-learner relationship. Fourth, how to make systems work for learning: achieving learning throughout an education system requires more than just scaling up effective interventions. Countries must also overcome technical and political barriers by deploying salient metrics for mobilizing actors and tracking progress, building coalitions for learning, and taking an adaptive approach to reform.
Urban Transit
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Author : Vukan R. Vuchic
language : en
Publisher: John Wiley & Sons
Release Date : 2017-11-13
Urban Transit written by Vukan R. Vuchic and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-13 with Technology & Engineering categories.
The only modern text to cover all aspects of urban transit operations, planning, and economics Global in scope, up-to-date with current practice, and written by an internationally renowned expert, Urban Transit: Operations, Planning, and Economics is a unique volume covering the full range of issues involved in the operation, planning, and financing of transit systems. Presenting both theoretical concepts and practical, real-world methodologies for operations, planning and analyses of transit systems, this book is a comprehensive single-volume text and reference for students as well as professionals. The thorough examination of technical fundamentals and management principles in this book enables readers to address projects across the globe despite nuances in regulations and laws. Dozens of worked problems and end-of-chapter exercises help familiarize the reader with the formulae and analytical techniques presented in the book's three convenient sections: Transit System Operations and Networks Transit Agency Operations, Economics, and Organization Transit System Planning Visually enhanced with nearly 250 illustrations, Urban Transit: Operations, Planning, and Economics is a reliable source of the latest information for transit planners and operators in transit agencies, metropolitan planning organizations, city governments, consulting firms as well as students of transportation engineering and city planning at universities and in professional courses.
A First Course In Finite Elements
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Author : Jacob Fish
language : en
Publisher: Wiley-Blackwell
Release Date : 2007-06-12
A First Course In Finite Elements written by Jacob Fish and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-12 with Computers categories.
Developed from the authors, combined total of 50 years undergraduate and graduate teaching experience, this book presents the finite element method formulated as a general-purpose numerical procedure for solving engineering problems governed by partial differential equations. Focusing on the formulation and application of the finite element method through the integration of finite element theory, code development, and software application, the book is both introductory and self-contained, as well as being a hands-on experience for any student. This authoritative text on Finite Elements: Adopts a generic approach to the subject, and is not application specific In conjunction with a web-based chapter, it integrates code development, theory, and application in one book Provides an accompanying Web site that includes ABAQUS Student Edition, Matlab data and programs, and instructor resources Contains a comprehensive set of homework problems at the end of each chapter Produces a practical, meaningful course for both lecturers, planning a finite element module, and for students using the text in private study. Accompanied by a book companion website housing supplementary material that can be found at http://www.wileyeurope.com/college/Fish A First Course in Finite Elements is the ideal practical introductory course for junior and senior undergraduate students from a variety of science and engineering disciplines. The accompanying advanced topics at the end of each chapter also make it suitable for courses at graduate level, as well as for practitioners who need to attain or refresh their knowledge of finite elements through private study.
Recommendation Of The Council On Regulatory Policy And Governance
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Author : OECD
language : en
Publisher: OECD Publishing
Release Date : 2012-11-02
Recommendation Of The Council On Regulatory Policy And Governance written by OECD and has been published by OECD Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-02 with categories.
This set of guidelines provides the measures by which governments can implement or advance regulatory reform.