نتایج جستجو برای: iesna
تعداد نتایج: 31 فیلتر نتایج به سال:
Background & Objective: Recommended illumination Engineering Society of North America (IESNA) methods were used to measure the illumination in regular geometric areas such as square or rectangular form areas. It seems that with using the GIS method which is used to save, manage and spatial data analysis and processing them by computer we would be able to examine the illumination in many situati...
The healthcare sector of today has very precise requirement with regard to interior lighting. To fulfill these needs, international standards which specify the strict requirement for each health care facility have come up. Hospital lighting is in particular complex because of the sensitive nature of various patients as well as requirement of high performance from its employees. Hence this makes...
background: daylight availability data are essential for designing effectively day lighted buildings. in respect to no available daylight availability data in iran, illuminance data on the south facing vertical surfaces were estimated using a proper method. methods: an illuminance measuring set was designed for measuring vertical illuminances for standard times over 15 days at one hour interval...
چکیده زمینه وهدف: برای اندازه گیری روشنایی از روش الگو های پیشنهادیiesna (انجمن مهندسان روشنایی آمریکای شمالی) استفاده می شود، لیکن این روش در مکان هایی با اَشکال هندسی منظم که به شکل مربع یا مستطیل است، کاربرد دارد. به نظر می رسد بتوان با کاربرد سیستم اطلاعات مکانی (gis) که برای ذخیره، مدیریت و تجزیه وتحلیل داده هایی با وابستگی مکانی و توصیفی استفاده می شود و با پردازش بر روی داده ها توسط رایان...
Describing the light intensity over the hemisphere using a goniometric diagram is a common practice in the lighting industry and is prescribed for instance by IESNA (Illuminating Engineering Society of North America) standards. Goniometric diagram specifies the spatial distribution of the emitted power via a hemispherical surface subdivided by meridians and parallels. Similar tabulated represen...
ANSI/ASHRAE/IESNA 90.1 Energy Standard for Buildings except Low-Rise Residential Buildings is the benchmark code of U.S. local regulations. In addition to provide a set of minimum mandatory requirements for energy-using components (prescriptive approach), the standard includes in the Appendix G a more flexible path to attest performances significantly better than code minimum (performance-based...
This paper presents a thermal analysis and experimental validation of natural convective heat transfer of a high-brightness light-emitting diode (LED) package assembly. The substrate materials used in the LED package assembly were filled and doped using boron nitride (BN) filler. The thermal conductivity of the BN-filled substrate was measured. The temperature distribution and heat flow of the ...
Background and aims: Adequate lighting in work environments can increase productivity and concentration and reduce fatigue. Light and illumination studies have been done mainly in industrial environments, and public or administrative environments were less under consideration. The aim of this study was to evaluate the ultraviolet radiation and illumination level at Kerman Medical Sciences Uni...
مقدمه: روشنایی یک فاکتور فیزیکی مهم و اصلاحپذیر در محیط کار میباشد. مطالعه حاضر با هدف تعیین شدت روشنایی طبیعی و توأم و همچنین میزان مواجهه با تابش فرابنفش در کتابخانهها و سایت های رایانه دانشگاههای شهر ایلام در بهار 1390 انجام گرفت. روش‌ها: در این مطالعه مقطعی تعداد 10 کتابخانه، 16 سالن مطالعه و 7 سایت کامپیوتر انتخاب شدند. از فرم ارزیابی روشنایی جهت جمعآوری اطلاعات ا...
Introduction: Visual comfort is an important and influential factor on safety, mental health, sleep quality, and musculoskeletal disorders of employees in the workplace. This study aimed to design and develop a questionnaire to assess the visual comfort of employees in the workplace. Methods: The study was performed on 101 participants (88 men and 13 women) in the food industry. First, the a...
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