Download or read book Effect of Vibration Duration on Human Discomfort Technical Paper written by S. A. Clevenson and published by . This book was released on 1978 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Vibration Duration on Human Discomfort written by Sherman A. Clevenson and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Vibration Duration on Human Discomfort written by Sherman A. Clevenson and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Human Response to Vibration written by Neil J. Mansfield and published by CRC Press. This book was released on 2004-10-28 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through continued collaboration and the sharing of ideas, data, and results, the international community of researchers and practitioners has developed an understanding of many facets of the human response to vibration. At a time when the EU is preparing to adopt a directive on health risks arising from occupational exposure to vibration, Human Response to Vibration offers authoritative guidance on this complex subject. Individual chapters in the book examine issues relating to whole-body vibration, hand-arm vibration, and motion sickness. Vibration measurements and standards are also addressed. This book meets the needs of those requiring knowledge of human response to vibration in order to make practical improvements to the physical working environment. Written with the consultant, practitioner, researcher, and student in mind, the text is designed to be an educational tool, a reference, and a stimulus for new ideas for the next generation of specialists.

Download or read book Handbook of Human Vibration written by M. J. Griffin and published by Academic Press. This book was released on 2012-12-02 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today the human body is exposed to vibration not only while traveling but also during leisure and domestic activities and in many occupations. This volume summarizes the current understanding of the many human responses to vibration. Divided into two parts, this book deals with whole-body vibrations and hand-transmitted vibration. In each part the experimental data and appropriate models are presented in detail so that readers can address practical problems. An extensive guide to national and international standards is provided, and a large multidisciplinary glossary of terms assists in understanding the relevant technical and medical jargon. This comprehensive reference volume is accessible to all those interested in human vibration: medical doctors, engineers, lawyers, scientists, and health and safety officials and administrators. LK uses the following bulleted list_ This new text features: An up-to-date statement of current knowledge on human responses to vibration A comprehensive glossary of terms in current use in the fields of vibration and human response An extensive bibliography and guide to national and international standards

Download or read book Effect of vibration exposure duration on discomfort written by Cedric Gallais and published by . This book was released on 2008 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The comfort of a seated person exposed to vibration is known to depend on the magnitude, frequency content, and direction of the excitation. A review of the literature showed that very little is known about the effects of the duration of exposure to vibration on comfort. This thesis investigates the effects of body support, frequency, waveform, and direction of excitation on the Subjective Discomfort Time-Dependency (SDTD) during vibration so as to improve understanding of the mechanisms involved (e.g. the biodynamic responses of the body and muscle activity) and elaborate a model predicting how discomfort evolves with exposure duration. To achieve these objectives, a new method of measuring the discomfort time-dependency was developed and tested. The Subjective Discomfort Time-Dependency has been investigated in 27 experimental sessions, each with twelve subjects seated on a conventional car seat. In each session, subjects were exposed to one stimulus. The new developed method requires the subjects to adjust the magnitude of the vibration in order to keep constant their discomfort. The SDTD was obtained by measuring the platform acceleration over the exposure duration. At specific time-intervals, subjects were also asked to indicate the locations of their discomfort and provide discomfort ratings for these locations. Results showed that the amount of vibration to achieve a constant level of discomfort decreased over time (mainly during the first 15 minutes of exposure). This implies that the sensitivity of vibration increases with duration. Fore-and-aft excitations generated a greater SDTD for most stimuli. For 1-Hz lateral sinusoidal motion, the sensitivity of vibration increased at a greater rate with a harness than without. Stimuli at 1 Hz produced SDTD that were less dependent on the duration of exposure than stimuli at higher frequencies. The waveforms of the vibration had little effect on the SDTD. The discomfort rating showed that prolonged exposure to vibration produced discomfort mainly at the neck. Because discomfort was mainly felt at the neck and that the SDTD depended on the frequency, it was hypothesised that the type of neck muscle activity produced during exposure to vibration depends on the frequency. Neck muscle activity was measured with 12 seated subjects during 10 minutes of fore-and-aft sinusoidal vibration. The r.m.s. magnitudes of the raw EMG and of the phasic and tonic components of the EMG were calculated (it was assumed that phasic muscle activity arose from the periodic vibration whereas the tonic muscle activity was needed to respond to a static load). Results showed that the frequency of vibration had no effect on the EMG r.m.s values but affected the phasic and tonic components of the EMG. Phasic activity was greatest at 1 Hz and decreased as the frequency increased. Tonic activity showed the opposite tendency. As for the SDTD studies, the frequency of excitation seems to have an effect on the phasic and tonic components of the neck muscle activity. Phasic and tonic neck muscle activities represent different types of head motions. Because the content of phasic and tonic activities of the EMG signal seems to be linked with the effects of vibration exposure duration on discomfort, it was hypothesised that predicting the head motions may help estimating the comfort timedependency. A three degree-of-freedom lumped parameter model was developed to predict floor-to-head transmissibility. The model was then calibrated to estimate the head motions using the floor-to-head, seat-tohead, and seat transmissibility measured with 12 subjects, exposed to fore-and-aft sinusoidal, narrow-band random, and broad-band random vibration. Results showed that the model can estimate the head motions around the frequencies of resonances (mode shapes), but requires improvement to be accurate at the other frequencies. The estimated mode shapes showed three types of head motions: at 1.4 Hz the head and neck moved in phase; at 3.5 Hz, there was a resonance of the backrest and the head and neck moved in phase, but with a greater head motion than neck motion; and at 6.9 Hz the head and neck moved out of phase. The subjective, physiological, and biodynamic studies suggest that the SDTD increases when the neck muscles attempt to control head motions by producing greater tonic, and less phasic, activity. The lumped parameter model identified through the mode shapes three types of head motions corresponding to different comfort time-dependencies. It was hypothesized that the phase and modulus of the seat-to-head transmissibility may indicate the amount of phasic and tonic activity produced. Through neck muscle activity, a model predicting seat-to-head transmissibility may also predict the time-dependency of discomfort. This thesis proposes a new method for determining the time-dependency of discomfort caused by whole-body vibration. Discomfort time-dependencies have been shown to depend on the frequency of vibration, direction of excitation, and body support. Mechanisms responsible for the discomfort time-dependency have been proposed.

Download or read book The Effects of Whole Body Vibration written by Heinrich Dupuis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: The observations made by Paracelsus concerning the dose-effect relationship of poison are generally just as applicable to health threatening vibration. With regard to kind, intensity, and duration of the vibration, the "dose" is decisive as to whether the conse quences are detrimental, unmeaningful, or tolerable with respect to health. This law of nature determines the tasks and goals of those whose aim is to safeguard health. Researchers worldwide have been occupying themselves with this many-faceted question for some time: how mechanical vibration affects the human organism and at what point damage occurs. If prevention in occupational medicine is to succeed, it is most important that the gaps in our present knowledge be closed, for if technical preventive measures are to be effective and preventive means in occupational medicine successful, they must be based on reliable and complete findings. Whenever many independent researchers have worked in a given field for a long period, a comprehensive intermediate as sessment is appropriate to evaluate the level achieved and the direction the research is going. In the area of hand-arm vibration, this evaluation has already been carried out, and the response aroused by this particular research report had led to a demand for a comparable evaluation of the research results on whole-body vibration. This report presents clearly and exhaustively the current status of international knowledge, as well as the questions that remain to be answered.

Download or read book Evaluation of Human Response to Structural Vibrations Induced by Sonic Booms written by Louis C. Sutherland and published by . This book was released on 1992 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Studies for Determining Human Discomfort Response to Vertical Sinusoidal Vibration written by Thomas K. Dempsey and published by . This book was released on 1975 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Summary of Current Bureau Research Into the Effects of Whole body Vibration and Shock on Operators of Underground Mobile Equipment written by Arnold C. Love and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Encyclopedia of Ergonomics and Human Factors written by Waldemar Karwowski and published by CRC Press. This book was released on 2001 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Human Factors in Transport Research User factors comfort the environment and behaviour written by David J. Oborne and published by . This book was released on 1980 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Artificial Intelligence Medicine Biology Chemistry Financial Games Engineering written by Nenad Filipovic and published by Springer Nature. This book was released on 2023-04-04 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is covering knowledge and results in theory, methodology, and applications of artificial intelligence and machine learning in academia and industry. Nowadays, artificial intelligence has been used in every company where intelligence elements are embedded inside sensors, devices, machines, computers and networks. The chapters in this book integrated approach toward global exchange of information on technological advances, scientific innovations, and the effectiveness of various regulatory programs toward AI application in medicine, biology, chemistry, financial, games, law, and engineering. Readers can find AI application in industrial workplace safety, manufacturing systems, medical imaging, biomedical engineering application, different computational paradigm, COVID-19, liver tracking, drug delivery system, and cost-effectiveness analysis. Real examples from academia and industry give beyond state of the art for application of AI and ML in different areas. These chapters are extended papers from the First Serbian International Conference on Applied Artificial Intelligence (SICAAI), which was held in Kragujevac, Serbia, on May 19–20, 2022.

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1979 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Encyclopedia of Ergonomics and Human Factors Second Edition 3 Volume Set written by Waldemar Karwowski and published by CRC Press. This book was released on 2006-03-15 with total page 1154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The previous edition of the International Encyclopedia of Ergonomics and Human Factors made history as the first unified source of reliable information drawn from many realms of science and technology and created specifically with ergonomics professionals in mind. It was also a winner of the Best Reference Award 2002 from the Engineering Libraries Division, American Society of Engineering Education, USA, and the Outstanding Academic Title 2002 from Choice Magazine. Not content to rest on his laurels, human factors and ergonomics expert Professor Waldemar Karwowski has overhauled his standard-setting resource, incorporating coverage of tried and true methods, fundamental principles, and major paradigm shifts in philosophy, thought, and design. Demonstrating the truly interdisciplinary nature of this field, these changes make the second edition even more comprehensive, more informative, more, in a word, encyclopedic. Keeping the format popularized by the first edition, the new edition has been completely revised and updated. Divided into 13 sections and organized alphabetically within each section, the entries provide a clear and simple outline of the topics as well as precise and practical information. The book reviews applications, tools, and innovative concepts related to ergonomic research. Technical terms are defined (where possible) within entries as well as in a glossary. Students and professionals will find this format invaluable, whether they have ergonomics, engineering, computing, or psychology backgrounds. Experts and researchers will also find it an excellent source of information on areas beyond the range of their direct interests.

Download or read book Human Factors for Naval Marine Vehicle Design and Operation written by Jonathan M. Ross and published by CRC Press. This book was released on 2017-03-02 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a driving need for naval professionals to focus on human factors issues. The number of maritime accidents is increasing and the chief cause is human error, both by the designer and the operator. Decreasing crew size, lack of experienced operators, operations in higher sea states and fatigue worsen the situation. Automation can be a partial solution, but flawed automated systems actually contribute to accidents at sea. Up to now, there has been no overarching resource available to naval marine vehicle designers and human factors professionals which bridges the gap between the human and the machine in this context. Designers understand the marine vehicle; human factors professionals understand how a particular environment affects people. Yet neither has a practical understanding of the other's field, and thus communicating requirements and solutions is difficult. This book integrates knowledge from numerous sources as well as the advice of a panel of eight recognized experts in the fields of related research, development and operation. The result is a reference that bridges the communications gap, and stands to help enhance the design and operation of all naval marine vehicles.