Download or read book Effects of Surround Illumination on Visual Performance written by Fred H. Ireland and published by . This book was released on 1967 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A common human factors recommendation states that, for good target visibility, the area surrounding a display should not be brighter than the background area within the display. However, this recommendation must often be violated in applications where the surround brightness cannot be adequately controlled (e.g. in an airplane cockpit) and/or display technique limitations prevent use of high brightness backgrounds (e.g. with cathode ray tubes). This literature review was undertaken to see what has been discovered thus far concerning the effects on target visibility of specific parameters of a surround-to-background. Well over 100 documents were reviewed. Seventy-five annotated references to the more pertinent documents are contained in this report. Quantitative effects of pertinent parameters have been studied by numerous investigators. Results of studies using extended surrounds, rather than point sources, have not been sufficiently comprehensive or consistent to support quantitative generalizations in this area. Attempts have been made by Holladay and by Moon and Spencer to make quantitative predictions for the extended surround case on the basis of the more extensive body of data dealing with point source effects. However, several of the findings upon which their formulas are based have been contradicted by other findings cited in this report. (Author).

Download or read book Experimental Study of the Effects of Surround Brightness and Size on Visual Performance written by Fred H. Ireland and published by . This book was released on 1967 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A visual display must often be used in a setting where the surrounding visual field is brighter than the background area within the display. Such use violates a common human factors recommendation that the brightness of the display surround should be equal to, or slightly less than, that of the background in the display itself. The purpose of this experiment was to determine, quantitatively, the degradation in visibility due to high surround brightness and thus to provide useful data for the display system designer. Measurements were made of the target-to-background contrast required for each of 5 Ss to determine, with 50% accuracy, the orientation of a light Landolt ring target centered on a darker circular background. The target gap subtended 1.93 minutes of arc. Background angular subtense was varied from 5° to 45°, background brightness from 0.17 to 18.43 millilamberts and surround-to-background brightness ratio from 0:1 to 100:1. A uniform surround, independently variable in brightness with respect to the background, filled the rest of the visual field. The scene was viewed monocularly with natural pupil. The contrast limen was found to vary directly with surround-to-background brightness ratio for ratios greater than one. The variation with background size was smaller than predicted by an equation for integrating the effects of point sources of glare. An apparent tendency for a slight increase in limen as the surround-to-background ratio decreased from 1:1 to 0:1 was not statistically significant. Results are described by equations, and a procedure for their practical application is illustrated.

Download or read book Annotated Bibliography on Visual Performance at Low Photopic Illumination Levels written by Milton L. Rock and published by . This book was released on 1949 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1968 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Visual and Non Visual Effects of Light written by Agnieszka Wolska and published by CRC Press. This book was released on 2020-07-29 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction of artificial lighting extends the time of wakefulness after dark and enables work at night, thus disturbing the human circadian rhythm. The understanding of the physiological mechanisms of visual and non-visual systems may be important for the development and use of proper light infrastructure and light interventions for different workplace settings, especially for shift work conditions. Visual and Non-Visual Effects of Light: Working Environment and Well-Being presents the impact of lighting in the working environment on human health, well-being and visual performance. The physiological explanation of the visual and non-visual effects of light on humans which discusses the biological bases of image and non-image forming vision at the cellular level may be of particular interest to any professional in the field of medicine, physiology, and biology. It is one of the intentions of this book to put forward some recommendations and examples of lighting design which take into account both the visual and non-visual effects of light on humans. These may be of particular interest to any professional in the field of lighting, occupational safety and health, and interior design. "What effects on health can a light ‘overdose’ or light deficiency have? What is bad light? The authors of the monograph provide answers to these questions. Just as for a physicist, the dual nature of light comprises an electromagnetic wave and a photon, the duality of light for a physician comprises visual and non-visual effects." --------------------------------------------------------Prof Jacek Przybylski, Medical University of Warsaw "This is a unique publication in the field of lighting technology. The authors have skillfully combined both the technical and biomedical aspects involved, which is unprecedented in the literature available. As a result, an important study has been created for many professional groups, with a significant impact on the assessment of risks associated with LED sources." --------------------------------------------Prof Andrzej Zając, Military University of Technology, Warsaw

Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AMRL TR written by and published by . This book was released on 1968 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Security Lighting for Nuclear Weapons Storage Sites written by Patrick G. Meguire and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Special Publication written by and published by . This book was released on 1977 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cumulated Index Medicus written by and published by . This book was released on 1968 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1968 with total page 1492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Human Factors and Ergonomics in Health Care and Patient Safety written by Pascale Carayon and published by CRC Press. This book was released on 2016-04-19 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of Handbook of Human Factors and Ergonomics in Health Care and Patient Safety took the medical and ergonomics communities by storm with in-depth coverage of human factors and ergonomics research, concepts, theories, models, methods, and interventions and how they can be applied in health care. Other books focus on particular human

Download or read book Human Factors in Lighting written by Peter Robert Boyce and published by CRC Press. This book was released on 2014-04-07 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: The availability of electric lighting has changed the lives of people the world over, yet as a major user of electricity it has come under increasing scrutiny in recent years. This scrutiny has focused largely on the environmental consequences, with little consideration of the benefits of lighting. Human Factors in Lighting, Third Edition restores

Download or read book Report on an Investigation of the High Speed Hazards of Steel Belted Radial Tires on Police Cars written by Jared J. Collard and published by . This book was released on 1977 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Force Research Resum s written by and published by . This book was released on with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Human Centric Integrative Lighting written by Tran Quoc Khanh and published by John Wiley & Sons. This book was released on 2023-08-01 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human Centric Integrative Lighting Detailed presentation of the technical and non-technical aspects of modern lighting and its effect on humans Human Centric Integrative Lighting provides a highly comprehensive overview of the subject, also referred to as human-centered indoor lighting technology; taking a practice-oriented approach, scientific findings in the field are condensed into models that can be directly used by developers. Written by leading scientists in the field of lighting technology, Human Centric Integrative Lighting includes detailed information on: Fundamentals of lighting technology as it interacts with human perception and the current state of interior lighting today Basic principles of human centric integrative lighting and its various aspects, such as visual performance, color quality, emotional impact, and correlation of relevant parameters Comprehensive lighting quality models and subsequently derived recommendations for the practical implementation of concepts Relevant research findings from journals, patent specifications, and standards to provide a unified outlook on the field Providing a comprehensive overview of the current state of development in the field, Human Centric Integrative Lighting discusses validated physiological and psychological perceptual models on which manufacturers of lighting products and suppliers of lighting technology solutions can base key design and development decisions. lighting products; lighting technology solutions; lighting design; lighting development; human-centered indoor lighting technology; lighting color quality; lighting principles; lighting emotional impact; lighting quality; lighting research

Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1968 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt: