Analytical And Experimental Investigation Of Overtesting During Assembly Level Shock Testing

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Analytical and Experimental Investigation of Overtesting During Assembly-level Shock Testing

Author : Jean-Philippe Deblois
Publisher :
ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Analytical and Experimental Investigation of Overtesting During Assembly-level Shock Testing by : Jean-Philippe Deblois

Download or read book Analytical and Experimental Investigation of Overtesting During Assembly-level Shock Testing written by Jean-Philippe Deblois and published by . This book was released on 2009 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical shocks induced by the detonation of pyrotechnics ordnances are known to be highly detrimental to the integrity of spacecraft components. As a result, it is desirable to qualify these components as early as possible to prevent failures during launch. Assembly-level shock tests are usually performed on these components. However, these tests are suspected to be the cause of several failures that would not occur during flight. The knowledge acquired in vibration testing suggests that the overtesting is mainly due to the rigidity of the mounting interface between the component and the testing device. Consequently, the test configuration lacks the dynamic absorber effect which should naturally occur in flight configuration. While the Force Limited Vibration (FLV) technique has been developed to reduce the overtesting occurring in vibration testing, no systematic methodology have been proposed to measure and to reduce the shock overtesting to this date. The objective of this study is to conduct systematic analytical and experimental sensitivity investigation on the overtesting occurring in the assembly-level shock testing. A reconfigurable prototype of an electronic box and a mounting structure have been designed and modeled using the finite element method. The prototype is then fabricated and tested to demonstrate the occurrence of overtesting experimentally. The vibration overtesting and the C 2 coefficients of the semi-empirical method are evaluated using FLV technique. The shock overtesting is evaluated similarly using an acceleration excitation generated for the shaker test. The results show that no significant correlation between the vibration and the shock overtesting exist. Finally, a method to reduce the shock overtesting is proposed in which the shock specification is notched at the main frequencies to limit the response of the structure.

Analytical and Experimental Investigation of Overtesting During Assembly-level Shock Testing Jean-Philippe Deblois

Author : Jean-Philippe Deblois
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Analytical and Experimental Investigation of Overtesting During Assembly-level Shock Testing Jean-Philippe Deblois by : Jean-Philippe Deblois

Download or read book Analytical and Experimental Investigation of Overtesting During Assembly-level Shock Testing Jean-Philippe Deblois written by Jean-Philippe Deblois and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Analytical and Experimental Investigation of Testing Time in a Shock Tube

Author : Glenn Raymond Parker
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (2 download)

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Book Synopsis An Analytical and Experimental Investigation of Testing Time in a Shock Tube by : Glenn Raymond Parker

Download or read book An Analytical and Experimental Investigation of Testing Time in a Shock Tube written by Glenn Raymond Parker and published by . This book was released on 1965 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 1206 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1967 with total page 1206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Topics in Modal Analysis & Testing, Volume 9

Author : Michael Mains
Publisher : Springer
ISBN 13 : 3319747002
Total Pages : 384 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Topics in Modal Analysis & Testing, Volume 9 by : Michael Mains

Download or read book Topics in Modal Analysis & Testing, Volume 9 written by Michael Mains and published by Springer. This book was released on 2018-07-04 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics in Modal Analysis & Testing, Volume 9: Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics, 2018, the ninth volume of nine from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Modal Analysis, including papers on: Operational Modal & Modal Analysis Applications Experimental Techniques Modal Analysis, Measurements & Parameter Estimation Modal Vectors & Modeling Basics of Modal Analysis Additive Manufacturing & Modal Testing of Printed Parts

The Shock and Vibration Bulletin

Author :
Publisher :
ISBN 13 :
Total Pages : 442 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis The Shock and Vibration Bulletin by :

Download or read book The Shock and Vibration Bulletin written by and published by . This book was released on 1967 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Improving Diagnosis in Health Care

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309377722
Total Pages : 473 pages
Book Rating : 4.3/5 (93 download)

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Book Synopsis Improving Diagnosis in Health Care by : National Academies of Sciences, Engineering, and Medicine

Download or read book Improving Diagnosis in Health Care written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2015-12-29 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Getting the right diagnosis is a key aspect of health care - it provides an explanation of a patient's health problem and informs subsequent health care decisions. The diagnostic process is a complex, collaborative activity that involves clinical reasoning and information gathering to determine a patient's health problem. According to Improving Diagnosis in Health Care, diagnostic errors-inaccurate or delayed diagnoses-persist throughout all settings of care and continue to harm an unacceptable number of patients. It is likely that most people will experience at least one diagnostic error in their lifetime, sometimes with devastating consequences. Diagnostic errors may cause harm to patients by preventing or delaying appropriate treatment, providing unnecessary or harmful treatment, or resulting in psychological or financial repercussions. The committee concluded that improving the diagnostic process is not only possible, but also represents a moral, professional, and public health imperative. Improving Diagnosis in Health Care, a continuation of the landmark Institute of Medicine reports To Err Is Human (2000) and Crossing the Quality Chasm (2001), finds that diagnosis-and, in particular, the occurrence of diagnostic errorsâ€"has been largely unappreciated in efforts to improve the quality and safety of health care. Without a dedicated focus on improving diagnosis, diagnostic errors will likely worsen as the delivery of health care and the diagnostic process continue to increase in complexity. Just as the diagnostic process is a collaborative activity, improving diagnosis will require collaboration and a widespread commitment to change among health care professionals, health care organizations, patients and their families, researchers, and policy makers. The recommendations of Improving Diagnosis in Health Care contribute to the growing momentum for change in this crucial area of health care quality and safety.

Animal Models of Cognitive Impairment

Author : Edward D. Levin
Publisher : CRC Press
ISBN 13 : 1420004336
Total Pages : 395 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Animal Models of Cognitive Impairment by : Edward D. Levin

Download or read book Animal Models of Cognitive Impairment written by Edward D. Levin and published by CRC Press. This book was released on 2006-06-22 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: The costs associated with a drug's clinical trials are so significant that it has become necessary to validate both its safety and efficacy in animal models prior to the continued study of the drug in humans. Featuring contributions from distinguished researchers in the field of cognitive therapy research, Animal Models of Cognitive Impairmen

Assessing Genetic Risks

Author : Institute of Medicine
Publisher : National Academies Press
ISBN 13 : 0309047986
Total Pages : 353 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Assessing Genetic Risks by : Institute of Medicine

Download or read book Assessing Genetic Risks written by Institute of Medicine and published by National Academies Press. This book was released on 1994-01-01 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raising hopes for disease treatment and prevention, but also the specter of discrimination and "designer genes," genetic testing is potentially one of the most socially explosive developments of our time. This book presents a current assessment of this rapidly evolving field, offering principles for actions and research and recommendations on key issues in genetic testing and screening. Advantages of early genetic knowledge are balanced with issues associated with such knowledge: availability of treatment, privacy and discrimination, personal decision-making, public health objectives, cost, and more. Among the important issues covered: Quality control in genetic testing. Appropriate roles for public agencies, private health practitioners, and laboratories. Value-neutral education and counseling for persons considering testing. Use of test results in insurance, employment, and other settings.

Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting & Dynamic Environments Testing, Volume 7

Author : Chad Walber
Publisher : Springer
ISBN 13 : 3030126765
Total Pages : 417 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting & Dynamic Environments Testing, Volume 7 by : Chad Walber

Download or read book Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting & Dynamic Environments Testing, Volume 7 written by Chad Walber and published by Springer. This book was released on 2019-05-03 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sensors and Instrumentation, Aircraft/Aerospace and Energy Harvesting, Volume 7: Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019, the seventh volume of eight from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Shock & Vibration, Aircraft/Aerospace, Energy Harvesting & Dynamic Environments Testing including papers on: Alternative Sensing & Acquisition Active Controls Instrumentation Aircraft/Aerospace & Aerospace Testing Techniques Energy Harvesting

The Unintended Consequences of High-Stakes Testing

Author : Gail M. Jones
Publisher : Rowman & Littlefield Publishers
ISBN 13 : 1461715474
Total Pages : 189 pages
Book Rating : 4.4/5 (617 download)

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Book Synopsis The Unintended Consequences of High-Stakes Testing by : Gail M. Jones

Download or read book The Unintended Consequences of High-Stakes Testing written by Gail M. Jones and published by Rowman & Littlefield Publishers. This book was released on 2003-04-09 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: To better understand how high-stakes accountability has influenced teaching and learning, this book takes an in-depth look at the myriad consequences that high-stakes tests hold for students, teachers, administrators, and the public. By focusing on these tests and spending large amounts of time on test preparation and driving teachers to teach low-level, rote memorization, schools are essentially wiping out non-tested subjects such as science, social studies, physical education, and the arts. Although testing is promoted as a strategy for improving education for all, research shows that testing has differential effects on students with special needs, minority students, students living in poverty, and those for whom English is a second language. The Unintended Consequences of High Stakes Testing unpacks the assumptions and philosophical foundations on which testing policies are based. The authors' arguments are grounded in extensive interviews and research. Through an examination of research, these authors show that high-stakes testing promotes students' dependence on extrinsic motivation at the cost of intrinsic motivation and the associated love of learning—which has tangible impacts on their education and lives. Features: -Examines how high stakes testing from the perspectives of teachers, students, and adminstrators. -Considers how testing impacts the curriculum including tested subjects such as reading, writing, and mathematics as well as non-tested subjects such as science, social studies, physical education, and the arts. -Documents how teachers and administrators engage in test preparation and discusses ethical and unethical test preparation practices. -Reviews the evolution of testing through history and how it mpacts the curriculum. -Examines the differential effects of testing on students with special needs, minority students, students living in poverty, and those for whom English is a second language.

Taking Action Against Clinician Burnout

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309495474
Total Pages : 335 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Taking Action Against Clinician Burnout by : National Academies of Sciences, Engineering, and Medicine

Download or read book Taking Action Against Clinician Burnout written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-01-02 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Patient-centered, high-quality health care relies on the well-being, health, and safety of health care clinicians. However, alarmingly high rates of clinician burnout in the United States are detrimental to the quality of care being provided, harmful to individuals in the workforce, and costly. It is important to take a systemic approach to address burnout that focuses on the structure, organization, and culture of health care. Taking Action Against Clinician Burnout: A Systems Approach to Professional Well-Being builds upon two groundbreaking reports from the past twenty years, To Err Is Human: Building a Safer Health System and Crossing the Quality Chasm: A New Health System for the 21st Century, which both called attention to the issues around patient safety and quality of care. This report explores the extent, consequences, and contributing factors of clinician burnout and provides a framework for a systems approach to clinician burnout and professional well-being, a research agenda to advance clinician well-being, and recommendations for the field.

Report of the Presidential Commission on the Space Shuttle Challenger Accident

Author : DIANE Publishing Company
Publisher : DIANE Publishing
ISBN 13 : 0788119125
Total Pages : 267 pages
Book Rating : 4.7/5 (881 download)

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Book Synopsis Report of the Presidential Commission on the Space Shuttle Challenger Accident by : DIANE Publishing Company

Download or read book Report of the Presidential Commission on the Space Shuttle Challenger Accident written by DIANE Publishing Company and published by DIANE Publishing. This book was released on 1995-07 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Vibration Testing

Author : Kenneth G. McConnell
Publisher : John Wiley & Sons
ISBN 13 : 9780471304357
Total Pages : 634 pages
Book Rating : 4.3/5 (43 download)

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Book Synopsis Vibration Testing by : Kenneth G. McConnell

Download or read book Vibration Testing written by Kenneth G. McConnell and published by John Wiley & Sons. This book was released on 1995-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consequently, the user of this equipment can be the dominant influence on the quality of test results.

Materials and Processes

Author : Barrie D. Dunn
Publisher : Springer
ISBN 13 : 3319233629
Total Pages : 677 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Materials and Processes by : Barrie D. Dunn

Download or read book Materials and Processes written by Barrie D. Dunn and published by Springer. This book was released on 2015-12-29 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to assist scientists and engineers select the ideal material or manufacturing process for particular applications; these could cover a wide range of fields, from light-weight structures to electronic hardware. The book will help in problem solving as it also presents more than 100 case studies and failure investigations from the space sector that can, by analogy, be applied to other industries. Difficult-to-find material data is included for reference. The sciences of metallic (primarily) and organic materials presented throughout the book demonstrate how they can be applied as an integral part of spacecraft product assurance schemes, which involve quality, material and processes evaluations, and the selection of mechanical and component parts. In this successor edition, which has been revised and updated, engineering problems associated with critical spacecraft hardware and the space environment are highlighted by over 500 illustrations including micrographs and fractographs. Space hardware captured by astronauts and returned to Earth from long durations in space are examined. Information detailed in the Handbook is applicable to general terrestrial applications including consumer electronics as well as high reliability systems associated with aeronautics, medical equipment and ground transportation. This Handbook is also directed to those involved in maximizing the relia bility of new materials and processes for space technology and space engineering. It will be invaluable to engineers concerned with the construction of advanced structures or mechanical and electronic sub-systems.

Laboratory Diagnosis of Urinary Tract Infections

Author : Jill E. Clarridge
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (17 download)

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Book Synopsis Laboratory Diagnosis of Urinary Tract Infections by : Jill E. Clarridge

Download or read book Laboratory Diagnosis of Urinary Tract Infections written by Jill E. Clarridge and published by . This book was released on 1998 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Making Sense of Test-Based Accountability in Education

Author : Laura S. Hamilton
Publisher : Rand Corporation
ISBN 13 : 0833033980
Total Pages : 193 pages
Book Rating : 4.8/5 (33 download)

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Book Synopsis Making Sense of Test-Based Accountability in Education by : Laura S. Hamilton

Download or read book Making Sense of Test-Based Accountability in Education written by Laura S. Hamilton and published by Rand Corporation. This book was released on 2002-07-31 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Test-based accountability systems that attach high stakes to standardized test results have raised a number of issues on educational assessment and accountability. Do these high-stakes tests measure student achievement accurately? How can policymakers and educators attach the right consequences to the results of these tests? And what kinds of tradeoffs do these testing policies introduce? This book responds to the growing emphasis on high-stakes testing and offers recommendations for more-effective test-based accountability systems.