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Academic literature on the topic 'Lighting characteristics'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Lighting characteristics"

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Van Kemenade, Ir Johan, and Jan Reker. "Beam Characteristics for Accent Lighting." Journal of the Illuminating Engineering Society 17, no. 2 (July 1988): 118–30. http://dx.doi.org/10.1080/00994480.1988.10748732.

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Zeng, Xiang Zhi, Chao Fang Xu, and Gang Liu. "Study on the Application of Regional Risk Assessment of Lightning in Electrical Equipment Insulation." Advanced Materials Research 433-440 (January 2012): 1092–98. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.1092.

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With the rapid development of urbanization and the power system, the damages for the power system and electrical equipments which due to lighting strike are increasing. As the distributions of lighting activity are regional and random, the requirements for electrical and electronic equipment, voltage and insulation level are varied from lighting activity in different regions. This paper adopts the Lightning Location Data on the Pearl River Delta in the last 10 years, and uses the method of probability statistics to analyze the regional ground flash density, the probability of lightning strike accident, the damages of the lightning strikes accidents and other risk factors. It takes the topography, regional features, population density and other factors into account, and uses the weighted scores to establish the risk assessment model for the lightning strikes, programs to achieve the automatic calculation in allusion to the risk of lightning strikes in different types of buildings and insulation levels of the electrical and electronic equipment, and assess the risk of lightning strikes on the electrical and electronic equipment. And based on the risk assessment result, it incorporates the installation location, characteristics, importance and other factors to study the electronic equipment withstand voltage and insulation level.
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Goh, Hui Hwang, Sy yi Sim, Jamil Shaari, Noor Atiqah Azali, Chin Wan Ling, Qing Shi Chua, and Kai Chen Goh. "A Review of Lightning Protection System - Risk Assessment and Application." Indonesian Journal of Electrical Engineering and Computer Science 8, no. 1 (October 1, 2017): 221. http://dx.doi.org/10.11591/ijeecs.v8.i1.pp221-229.

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<p> A lightning strike could bring thousands mega-ampere of current in a blink of eyes. As a result, a failure of grounding the strike may cause serious damage to the home and industrial appliances and gadgets. Hence, a lightning protection system is essential to the current transmission system. Lighting is a natural phenomenon that is unavoidable. Hence, the study of the properties and characteristics of lightning is a must in designing lighting protection system. Every application has different criteria to be fulfilled. The type of lighting protection system is categorized based on the location and user. The different of location is a public area, transportation system, power system transmission and generation system which include renewable energy source. Each area can conclude different level of protection. This paper is assessing the possibility and probability of transient impact on all applications including, public area, power system line, and generating system. The review includes countermeasure which addressed few steps to determine the effect of lightning and countermeasure of protection.</p>
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Chen, Han. "Lighting design method of museum exhibition hall based on Internet of Things and deep learning." Journal of Computational Methods in Sciences and Engineering 22, no. 2 (March 28, 2022): 411–23. http://dx.doi.org/10.3233/jcm-215717.

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In order to improve the lighting effect of the museum exhibition hall, clearly express the exhibition content of the museum exhibition hall, a lighting design method of museum exhibition hall based on Internet of Things and deep learning is proposed. According to the characteristics and functions of light sources and lamps, select appropriate light sources and lamps, and establish a convolutional neural network to evaluate the performance of lighting characteristic network model through computing accuracy, precision, recall and F1 score. Because the illumination of museum exhibition hall cannot be too high, the light projection method is designed to realize the lighting design of museum exhibition hall from two aspects: lighting mode and lighting characteristics, environmental lighting and light source form. The experimental results show that the lighting design method of the museum exhibition hall based on the Internet of Things and deep learning can achieve more than 70%, which has a good lighting effect and can clearly express the display content of the museum exhibition hall.
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Shelford, Timothy J., and Arend-Jan Both. "On the Technical Performance Characteristics of Horticultural Lamps." AgriEngineering 3, no. 4 (September 28, 2021): 716–27. http://dx.doi.org/10.3390/agriengineering3040046.

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Recent advances in light emitting diode (LED) technology have provided exciting opportunities for plant lighting applications, and it is expected that LED lighting will soon overtake the still common use of high-intensity discharge (HID) lighting technology. Because LED lighting offers novel capabilities, extensive research is needed to identify optimal lighting practices for the large number of crops grown by commercial greenhouse growers. Plant scientists and growers facing decisions about plant lighting systems do not always have sufficient information about lamp performance characteristics. In this paper, we reported on various technical performance characteristics for 18 lamp types commonly used for plant production, and compared these characteristics with the characteristics of sunlight. The results showed a substantial range of performance characteristics, highlighting the importance of a careful assessment before selecting a light source for horticultural applications. The data presented in this paper can be used to assess the suitability of a specific light source for a particular horticultural application.
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Kwon, Sook-Youn, Kyoung-Mi Im, and Jae-Hyun Lim. "LED Context Lighting System in Residential Areas." Scientific World Journal 2014 (2014): 1–16. http://dx.doi.org/10.1155/2014/851930.

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As issues of environment and energy draw keen interest around the globe due to such problems as global warming and the energy crisis, LED with high optical efficiency is brought to the fore as the next generation lighting. In addition, as the national income level gets higher and life expectancy is extended, interest in the enhancement of life quality is increasing. Accordingly, the trend of lightings is changing from mere adjustment of light intensity to system lighting in order to enhance the quality of one’s life as well as reduce energy consumption. Thus, this study aims to design LED context lighting system that automatically recognizes the location and acts of a user in residential areas and creates an appropriate lighting environment. The proposed system designed in this study includes three types of processing: first, the creation of a lighting environment index suitable for the user’s surroundings and lighting control scenarios and second, it measures and analyzes the optical characteristics that change depending on the dimming control of lighting and applies them to the index. Lastly, it adopts PIR, piezoelectric, and power sensor to grasp the location and acts of the user and create a lighting environment suitable for the current context.
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LIU, Jingyi, and Zongyi YIN. "The Experience of China’s LED Lighting Industry’s Development." Volume 26, Number 4, 2018, no. 04-2018 (December 2018): 57–62. http://dx.doi.org/10.33383/2018-122.

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As a big country with the production and sale of lighting products in the world, LED lighting products are widely used in China, and the LED lighting industry is playing an important role in the whole national economy. To analyze the characteristics and experience of the development of China’s LED lighting industry, the development history of China’s LED lighting industry was reviewed, the characteristics of the development of China’s LED lighting industry were summarized, and the development prospect of China’s LED lighting industry was forecasted. Results show that the development of LED lighting industry in China is divided into three stages, which show the characteristics of industrial policy support, core technology leap breakthrough and industrial agglomeration effect. The conclusion has guidance and reference for the development of LED lighting industry in developing countries.
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Tkachuk, A. E., O. A. Sotnikova, and A. N. Goykalov. "THE METHOD FOR EVALUATION THE CHARACTERISTICS OF ARCHITECTURAL LIGHTING OF BUILDINGS." Engineering and Construction Bulletin of the Caspian Region 112 (2021): 47–53. http://dx.doi.org/10.52684/2312-3702-2021-36-2-47-53.

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The variety of modern technologies and the versatility of lighting solutions in architectural structures necessitate a method for evaluating such solutions. In this article, a method for assessing the characteristics of architectural lighting of buildings is graphically demonstrated, based on the example of architectural lighting of a public building in the city of Voronezh. The proposed method involves the identification of qualitative indicators of the expressiveness of architectural lighting of facades and their quantitative assessment using an integrated approach from the standpoint of the selected characteristics and criteria. Thanks to this method, the strengths and weaknesses of the studied architectural lighting of the building are clearly identified for its subsequent modernization or the creation of promising conclusions for the design of new construction objects.
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Kim, Kyeong-Mi, Young-Won Kim, Seung-Taek Oh, and Jae-Hyun Lim. "Development of a natural light reproduction system for maintaining the circadian rhythm." Indoor and Built Environment 29, no. 1 (June 11, 2019): 132–44. http://dx.doi.org/10.1177/1420326x19855421.

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Circadian rhythm is linked to sleep, arousal and human health overall, affecting body temperature and heart rate. A 24-h natural-light cycle provides optimum lighting environment for humans. However, as people increasingly stay indoors with artificial lighting, lacking periodic characteristics, imbalance in the circadian rhythm ensues. Previous lighting-related studies to resolve such problem partially provided the colour temperatures of natural light but failed to reproduce the 24-h periodic characteristics of it. This study proposes a natural light-reproducing system that provides the daylight cycle characteristics of natural light in order to maintain the circadian rhythm. Natural light was measured through an optical measurement equipment, while the characteristics (colour temperature and short-wavelength ratio) of natural light by season and time were analysed. Subsequently, the control indicator of seasonal and hourly lighting was extracted and applied to the light-emitting diode lighting to provide lighting service, executing a daylight cycle that reflects the characteristics of natural light. After the sunset, especially, the circadian rhythm was maintained by minimizing the short-wavelength ratio of the lighting while maintaining indoor illumination.
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Xu, Jing Feng, De Xin Zong, and Yi Hua Yin. "Applications of Light Guide Lighting Technology in Tunnel Lighting." Advanced Materials Research 461 (February 2012): 521–25. http://dx.doi.org/10.4028/www.scientific.net/amr.461.521.

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As a new lighting technology, light guide lighting technology has been paid more attention and applied in the indoor lighting widely. However, it is rarely applied to tunnel lighting recently. This paper analyzes the characteristics of light guide lighting system and tunnel lighting, and discusses the feasibility of application of light guide lighting technology in tunnel lighting. Finally, it proposes some light guide lighting technologies suitable for tunnel lighting, and provides the ideas and references to application and promotion of light guide lighting technology in tunnel lighting in the future.
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Dissertations / Theses on the topic "Lighting characteristics"

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Fernandes, Luis Lomelino. "From lighting performance goals to the optical characteristics of fenestration." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3207697.

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Anderson, David Ewart. "An investigation into the thermal performance of high temperature theatre luminaires, and the development of a mathematical model to predict and improve critical thermal operating characteristics." Thesis, Edinburgh Napier University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365202.

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Gonzalez-Velez, Enrique. "Safety Evaluation of Roadway Lighting Illuminance Levels and its Relationship with Nighttime Crash Injury Severity for West Central Florida Region." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3122.

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The main role of roadway lighting is to produce quick, accurate and comfortable visibility during nighttime conditions. It is commonly known that good lighting levels enable motorists, pedestrians and bicyclists to obtain necessary visual information in an effective and efficient manner. Many previous studies also proved that roadway lighting minimizes the likelihood of crashes by providing better visibility for roadway users. Appropriate and adequate roadway lighting illuminance levels for each roadway classification and pedestrian areas are essential to provide safe and comfortable usage. These levels are usually provided by national, or local standards and guidelines. The Florida Department of Transportation (FDOT) Plan Preparation Manual recommends a roadway lighting illuminance level average standard of 1.0 horizontal foot candle (fc) for all the roadway segments used in this research. The FDOT Plan Preparation Manual also states that this value should be considered standard, but should be increased if necessary to maintain an acceptable uniformity illuminance ratio. This study aimed to find the relationship between nighttime crash injury severity and roadway lighting illuminance. To accomplish this, the research team analyzed crash data and roadway lighting illuminance measured in roadway segments within the West Central Florida Region. An Ordered Probit Model was developed to understand the relationship between roadway lighting illuminance levels and crash injury severity. Additionally, a Negative Binomial Model was used to determine which roadway lighting illuminance levels can be more beneficial in reducing the counts of crashes resulting in injuries. A comprehensive literature review was conducted using longitudinal studies with and without roadway lighting. Results showed that on the same roadways there was a significant decrease in the number of nighttime crashes with the presence of roadway lighting. In this research, roadway lighting illuminance was measured every 40 feet using an Advanced Lighting Measurement System (ALMS) on a total of 245 centerline miles of roadway segments within the West Central Florida Region. The data were mapped and then analyzed using the existing mile post. During the process of crash data analysis, it was observed that rear-end collisions were the most common first harmful event observed in all crashes, regardless of the lighting conditions. Meanwhile, the average injury severity for all crashes, was found to be possible injury regardless of the lighting conditions (day, dark, dusk, and dawn). Finally, this research presented an Ordered Probit Model, developed to understand the existing relationship between roadway lighting illuminance levels and injury severity within the West Central Florida Region. It was observed that having a roadway lighting average moving illuminance range between 0.4 to 0.6 foot candles (fc) was more likely to have a positive effect in reducing the probability of injury severity during a nighttime crash. A Negative Binomial Model was conducted to determine if the roadway lighting average moving illuminance level, found on the Ordered Probit Model was beneficial in reducing crash injury severity during nighttime, would also be beneficial in reducing the counts of crashes resulting in injuries. It was observed that a roadway lighting average moving illuminance, range between 0.4 to 0.6 fc, was more likely to reduce the count of crashes resulting in injuries during nighttime conditions, thus increasing roadway safety. It was also observed that other factors such as pavement condition, site location (intersection or no intersection), number of lanes, and traffic volume can affect the severity and counts of nighttime crashes. The results of this study suggest that simply adding more roadway lighting does not make the roadway safer. The fact is that a reduction in the amount of roadway lighting illuminance can produce savings in energy consumption and help the environment by reducing light pollution. Moreover, these results show that designing roadway lighting systems go beyond the initial design process, it also requires continuous maintenance. Furthermore, regulations for new developments and the introduction of additional lighting sources near roadway facilities (that are not created with the intent of being used for roadway users) need to be created.
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Engholm, Cynthia Dorothy Kidder. "Positive lightning and bipolar lightning patterns : observational characteristics." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/52900.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
Includes bibliographical references (leaves 211-214).
by Cynthia Dorothy Kidder Engholm.
M.S.
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Драч, Юрій Олександрович. "Підвищення точності вимірювання геометричних розмірів мікрометричного діапазону шляхом вдосконалення вузла освітлення оптико-електронної системи." Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/38419.

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В даній магістерській дисертаційній роботі проведено аналітичне дослідження будови оптико-електронної вимірювальної системи, її складових вузлів та особливостей налаштування. З самої теми дисертації «Підвищення точності вимірювання геометричних розмірів мікрометричного діапазону шляхом вдосконалення вузла освітлення оптико-електронної системи» видно, що шляхом підвищення точності вимірювання геометричних розмірів у мікрометричному діапазону є вдосконалення джерела освітлення. Ми визначили основні відомі методи визначення світло-технічних характеристик джерел освітлення у другому розділі дисертації. В розділі нами проаналізовано методи «інтегруючої сфери» та «гоніофотометричний» для визначення світлового потоку освітлювальних систем з різним типом світлового розподілу. Звісно, ми розглядали методи світового досвіду визначення цих характеристик та вітчизняного досвіду, адже ми планували проведення експериментальних досліджень власного джерела випромінювання, що відповідало б світовому рівню. У третьому розділі ми навели приклади трьох джерел освітлення з зазначенням світлотехнічних характеристик. Ми зазначили спектральні характеристики для кожного джерела освітлення. У четвертому розділі ми навели матеріали, щодо побудови нами оптико- електронної вимірювальної системи. Свою вимірювальну систему для визначення геометричних розмірів мікрометричного діапазону, ми спроектували на базі оптичного мікроскопу, телевізійної камери, що закріплювалась до тіла оптичного мікроскопу з застосуванням перехідників (тубусів). Отримане, CCD матрицею телевізійної камери, випромінювання від об’єкту дослідження геометричних розмірів, надходило до персонального комп’ютеру з необхідним програмним забезпеченням, що дозволило нам за випромінюванням визначати розміри об’єкту або дефекту об’єкту. Хочемо зазначити, що програмне забезпечення ми в магістерській дисертації не розробляли, а користувались готовим програмним продуктом. Адже такого завдання перед нами не стояло. Більшість наших зусиль було спрямовано на дослідження джерела освітлення. Проте, хочемо зазначити, що після отриманих результатів щодо дослідження світло-технічних характеристик нового джерела освітлення, ми провели ряд вимірювань геометричних розмірів у мікрометричному діапазоні. Щоб порівняти точність вимірювання мікрометричних геометричних розмірів. Для цього ми проводили вимірювання на еталонному зразку лінійних геометричних розмірів ГОСТ 15114-78 Даний комплект мір використовують встановлення роздільної здатності телескопічних систем, кутові геометричні розміри ми не вимірювали. Хочемо зазначити, що ми обрали у якості нового джерела освітлення світлодіодну лампу та порівнювали отримані результати світлотехнічних характеристик з джерелом, що є стандартним (базовим) для моделі оптичного мікроскопу. Отже нами проведено ряд експериментальних досліджень світлотехнічних характеристик найпопулярнішого джерела освітлення - світлодіодної ламп. Аналіз результатів дослідження показав, що перед тим як застосовувати лампу масового виробництва виготовлену за будь-якою технологією у вимірювальній системі (оптико-електронна система) необхідно після спеціалізованого дослідження у центрах випробувань і діагностики надпровідникових джерел світла та освітлювальних систем. Адже зазначені світлотехнічні характеристики від виробників не відповідають тим, що визначено дослідним шляхом.
In this master's dissertation an analytical study of the structure of the optoelectronic measuring system, its components and features of the setting. From the topic of the dissertation "Improving the accuracy of measuring the geometric dimensions of the micrometric range by improving the lighting unit of the optoelectronic system" it is clear that by improving the accuracy of measuring geometric dimensions in the micrometric range is improving the light source. We have identified the main known methods for determining the lighting characteristics of light sources in the second section of the dissertation. In this section we analyze the methods of "integrating sphere" and "goniophometric" to determine the luminous flux of lighting systems with different types of light distribution. Of course, we considered the methods of world experience in determining these characteristics and domestic experience, because we planned to conduct experimental studies of our own radiation source, which would correspond to the world level. In the third section, we gave examples of three light sources with lighting characteristics. We noted the spectral characteristics for each light source. In the fourth section, we presented materials on the construction of our optoelectronic measuring system. We designed our measuring system to determine the geometric dimensions of the micrometric range on the basis of an optical microscope, a television camera, which was attached to the body of the optical microscope using adapters (tubes). The radiation received from the geometric dimensions object by the CCD matrix of the television camera was sent to a personal computer with the necessary software, which allowed us to determine the dimensions of the object or the defect of the object by the radiation. We would like to note that we did not develop the software in the master's dissertation, but used the finished software product. After all, we did not face such a task. Most of our efforts have been focused on researching the light source. However, we would like to note that after the results obtained on the study of lighting characteristics of the new light source, we conducted a series of measurements of geometric dimensions in the micrometric range. To compare the accuracy of measuring micrometric geometric dimensions. To do this, we performed measurements on a reference sample of linear geometric dimensions GOST 15114-78 This set of measures uses the establishment of the resolution of telescopic systems, we did not measure the angular geometric dimensions. We would like to note that we chose an LED lamp as a new light source and compared the obtained results of lighting characteristics with a source that is standard (basic) for the optical microscope model. Therefore, we conducted a number of experimental studies of the lighting characteristics of the most popular light source - LED lamps. Analysis of the results of the study showed that before using a mass-produced lamp made by any technology in a measuring system (optoelectronic system) it is necessary after a specialized study in the centers of testing and diagnostics of superconducting light sources and lighting systems. After all, these lighting characteristics from the manufacturers do not correspond to those determined experimentally. Although the characteristics of the LED lamp were not significantly different from the halogen lamp. The impact on the measurement accuracy of the optoelectronic measuring system of these light sources, we determined using a bar measure of absolute contrast and concluded that the efficiency of LED lighting is four times higher than halogen lighting when building a measuring system as described in dissertation.
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Motley, Shane Michael. "Total lightning characteristics of ordinary convection." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1735.

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Steiger, Scott Michael. "Thunderstorm lightning and radar characteristics: insights on electrification and severe weather forecasting." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4684.

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Total lightning mapping, along with radar and NLDN cloud-to-ground lightning data, can be used to diagnose the severity of a storm. Analysis of the 13 October 2001 supercell event (Dallas-Fort Worth, Texas), some supercells of which were tornadic, shows that LDAR II lightning source heights (quartile, median, and 95th percentile heights) increased as the storms intensified. Most of the total lightning occurred where reflectivity cores extended upwards and within regions of reflectivity gradient rather than in reflectivity cores. A total lightning hole was associated with an intense, nontornadic supercell on 6 April 2003. This feature was nonexistent from all supercells analyzed during the 13 October case. During tornadogenesis, the radar and LDAR II data indicated updraft weakening. The height of the 30 dBZ radar top began to descend approximately 10 minutes (2 volume scans) before tornado touchdown in one storm. Total lightning and CG flash rates decreased by up to a factor of 5 to a minimum during an F2 tornado touchdown associated with this storm. LDAR II source heights all showed descent by 2-4 km during a 25 minute period prior to and during this tornado touchdown. This drastic trend of decreasing source heights was observed in two tornadic storms prior to and during tornado touchdown, but did not occur in non-tornadic supercells, suggesting that these parameters can be useful to forecasters. These observations agree with tornadogenesis theory that an updraft weakens and the mesocyclone can become divided (composed of both updraft and downdraft) when a storm becomes tornadic. LDAR II source density contours were comma-shaped in association with severe wind events within mesoscale convective systems (MCSs) on 13 October 2001 and 27 May 2002. This signature is similar to the radar reflectivity bow echo. Consistent relationships between severe weather, radar and lightning storm characteristics (i.e., lightning heights) were not found for cells within MCSs as was the case for supercells. Cell interactions within MCSs are believed to weaken these relationships as reflectivity and lightning from nearby storms contaminate the cells of interest. It is also more difficult to clearly define a cell within an MCS.
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Teschan, Paul Erhard. "Determination of lightning characteristics through the use of electromagnetic field data." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277252.

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In this thesis we determine the electromagnetic fields of a current distribution located, in free space, above a perfectly conducting plane earth. Then we consider the inverse problem of determining the source distribution from the fields. Formulae are obtained for the volume integral (dipole moment) of the current density of a small current source in terms of the fields and known functions. If field data are measured (from lightning over sea water for example) the dipole moment of the current density producing the fields may be found. The validity of the small source approximation used in this work is also established. Finally, a method is developed for determining the average current at points on a vertical line current source, a common model for a lightning return stroke. We treat the source as a string of dipoles and apply a method of constrained inversion.
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Bailey, Matthew A. "Investigating Characteristics of Lightning-Induced Transient Luminous Events Over South America." DigitalCommons@USU, 2010. http://digitalcommons.usu.edu/etd/667.

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Sprites, halos, and elves are members of a family of short-lived, luminous phenomena known as Transient Luminous Events (TLEs), which occur in the middle atmosphere. Sprites are vertical glows occurring at altitudes typically ranging from ~40 to 90 km. In video imagery they exhibit a red color at their top, with blue tendril-like structure at low altitudes. Elves are disk-like glows that occur at the base of the ionosphere, with diameters of ~100-300 km, and have very short lifetimes (~2-3 ms). Halos are diffuse glows that occur at low altitudes, have diameters <100 km, and have a duration that may last up to 10s of ms. A majority of the studies of TLEs have taken place over the Midwestern U.S. where they were first discovered. This area produces large thunderstorms, which in turn generate large lightning discharges that have been associated with the formation of TLEs. Studies have used the low frequency radiation that initiates with these strokes to study characteristics of these events. This low frequency radiation has been used to determine where large numbers of TLEs may occur. Extreme southern Brazil is a region of the globe believed to have many TLEs, but few studies on these phenomena. Two collaborative campaigns involving Utah State University proceeded in 2002-2003, and in 2006. Multiple TLE images were made, proving this is, indeed, a region of the globe where these types of events are prominent. In particular, one storm in February 2003 produced over 440 TLEs imaged by USU video cameras. Of these events, over 100 of them had associated halos. Statistical studies for halos previously had been performed in the U.S., but never abroad. Also, several events from the February storm have been associated with negative cloud to ground lightning, a surprising occurrence, as to date, less than a handful of such events have ever been witnessed or published. In analyzing the TLEs from this campaign, we have shown the halos are similar to those seen in the U.S., even though the storms may be somewhat different. Also, detailed analyses of the negative events show both temporal and spatial morphology heretofore never reported on.
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Barnum, Benjamin Heath. "Electromagnetic and optical characteristics of lightning measured in the earth's ionosphere /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/6843.

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Books on the topic "Lighting characteristics"

1

Illumination, International Commission on. Methods of characterizing illuminance meters and luminance meters: Performance, characteristics and specifications. Vienna: Central Bureau of The CIE, 1987.

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Lighting out for the territory: Reflections on Mark Twain and American culture. New York: Oxford University Press, 1996.

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Latham, Don J. Characteristics of long vertical DC arc discharges. [Ogden, Utah]: U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1989.

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Latham, Don J. Characteristics of long vertical DC arc discharges. 0gden, UT: U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1989.

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Latham, Don J. Characteristics of long vertical DC arc discharges. 0gden, UT: U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1989.

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Fishkin, Shelley Fisher. Lighting Out for the Territory: Reflections on Mark Twain and American Culture. Oxford University Press, USA, 1998.

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Elkin, Paul R. Analysis of the spatial, temporal, and electrical characteristics of lightning in portions of the Northwestern United States for 1985 and 1986. 1988, 1988.

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Kaplan, Gisela. Tawny Frogmouth. CSIRO Publishing, 2007. http://dx.doi.org/10.1071/9780643095090.

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The tawny frogmouth is both intriguing and endearing. In this new book, well-known author Gisela Kaplan presents us with an easy-to-read account of these unique nocturnal birds of the Australian bush. This detailed account of life, behaviour and biology of tawny frogmouths is based on the most comprehensive single study ever conducted on tawny frogmouths, including wild and hand-raised birds. It combines ten years of systematic observation with published research to take us across a surprising range of characteristics and special features of this unusual bird. This book also notes insights derived from specific regional bird fauna surveys across Australia. We are shown this captivating Australian species in completely new and even unexpected ways. We learn that tawny frogmouths are very affectionate, have close bonds with lifelong partners, scream like prowling tomcats when distressed, fight with lightning speed and defend nest sites from reptilian predators by mobbing and spraying pungent faeces at these dangerous opponents. Uncompromising male fights are contrasted with a touching gentleness of males as fathers. We also learn how resilient and unusual tawny frogmouths are in the way they cope with heat and cold, sit out danger, do without drinking for most of their lives, and can use a large variety of food items. The developmental stages of nestlings and juveniles are illustrated with a number of stunning visual images accompanying the text, most of which have never before been described or seen.
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Book chapters on the topic "Lighting characteristics"

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Mercatelli, L., and A. Giannini. "Characteristics of Light Sources." In Sustainable Indoor Lighting, 65–76. London: Springer London, 2014. http://dx.doi.org/10.1007/978-1-4471-6633-7_4.

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Goto, Eiji. "Measurement of Photonmetric and Radiometric Characteristics of LEDs for Plant Cultivation." In LED Lighting for Urban Agriculture, 395–402. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1848-0_28.

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Davis, J. L., R. Yaga, M. Lamvik, K. Mills, and B. Fletcher. "The Influence of Phosphor and Binder Chemistry on the Aging Characteristics of Remote Phosphor Products." In Solid State Lighting Reliability Part 2, 141–57. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58175-0_6.

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Tsao, Jeff Y., Jonathan J. Wierer, Lauren E. S. Rohwer, Michael E. Coltrin, Mary H. Crawford, Jerry A. Simmons, Po-Chieh Hung, et al. "Ultra-Efficient Solid-State Lighting: Likely Characteristics, Economic Benefits, Technological Approaches." In Topics in Applied Physics, 11–28. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3755-9_2.

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Tsao, Jeff Y., Jonathan J. Wierer, Lauren E. S. Rohwer, Michael E. Coltrin, Mary H. Crawford, Jerry A. Simmons, Po-Chieh Hung, et al. "Introduction Part B. Ultra-efficient Solid-State Lighting: Likely Characteristics, Economic Benefits, Technological Approaches." In Topics in Applied Physics, 11–26. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5863-6_2.

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Matsuhiro, Keiji, Keiichiro Watanabe, Tsuneaki Ohashi, and Tomokatsu Hayakawa. "Engineering Approach to Improve the Solid State Lighting Characteristics with Translucent Poly Crystalline Alumina." In Ceramic Transactions Series, 69–81. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119236016.ch7.

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Ma, Liangdong, Yiying Xu, Yugen Qin, and Jili Zhang. "Identifying Abnormal Energy Consumption Data of Lighting and Socket Based on Energy Consumption Characteristics." In Advances in Intelligent Systems and Computing, 59–72. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6733-5_6.

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Suwignyo, Bambang, Bambang Suhartanto, Cuk Tri Noviandi, Nafiatul Umami, Nilo Suseno, Hermanto, and Bambang Waluyo Hadi Eko Prasetiyono. "Generative Plant Characteristics Alfalfa (Medicago sativa L.) on Different Levels of Dolomite and Lighting Duration." In Proceeding of the 1st International Conference on Tropical Agriculture, 353–61. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60363-6_34.

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van Mil, Imke Wies, Olga Popovic Larsen, Karina Mose, and Anne Iversen. "Design with Knowledge—Light in Learning Environments." In Teacher Transition into Innovative Learning Environments, 203–13. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7497-9_17.

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AbstractA range of artificial lighting characteristics have been found to influence our visual and cognitive capabilities, mood, motivation and/or (social) behaviour—all affecting how we (academically) perform. One such influential characteristic is spatial contrast, or the way light is distributed in space causing a pattern of light and darkness. This study looks at if and how spatial contrast influences pupil behaviour, and specifically their ability to concentrate. We first explored whether variances in pupil noise, physical activity and mood, which have been found to affect concentration, occur when exposed to either a high or a low spatial contrast in their learning environment. Preliminary data from field experiments in a primary school indicates towards decreased noise levels and improved environmental satisfaction when a high spatial contrast condition is present. This implies improved environmental circumstances to concentrate. Further research to confirm this assumption will be undertaken.
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Singh, Jyoti, Dirk Poelman, Vikas Dubey, and Vinay Gautam. "Synthesis and Luminescence Characteristics of Europium Doped Gadolinium Based Oxide Phosphors for Display and Lighting Applications." In Luminescent Materials in Display and Biomedical Applications, 163–85. First. | Boca Raton : CRC Press, Taylor & Francis Group, [2021]: CRC Press, 2020. http://dx.doi.org/10.1201/9780429025334-9.

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Conference papers on the topic "Lighting characteristics"

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Tsankov, Plamen, Milko Yovchev, Hristo Ibrishimov, and Teodor Todorov. "Study of the photometric and the colorimetric characteristics of the optical systems of LED domestic lamps." In 2020 Fifth Junior Conference on Lighting (Lighting). IEEE, 2020. http://dx.doi.org/10.1109/lighting47792.2020.9240577.

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Tsankov, Plamen, Emil Stanev, and Ivaylo Stoyanov. "Analysis of the Influence of Mechanical Damages of Thin Layer Cadmium Telluride Photovoltaic Panels on Their Electrical Characteristics." In 2021 Sixth Junior Conference on Lighting (Lighting). IEEE, 2021. http://dx.doi.org/10.1109/lighting49406.2021.9599001.

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Qu, Wanying, Wei Cheng, and Fang Wang. "Lighting Characteristics Analysis on Sunshine Underground Garage." In 2017 2nd International Conference on Electrical, Automation and Mechanical Engineering (EAME 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/eame-17.2017.74.

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Sakuma, Y., A. Teramura, T. Saito, K. Kasahara, T. Otsuka, and N. Miura. "Transient Characteristics of CBP:Ir(ppy)3-Based Organic Light Emitting Diodes under High Voltages." In Solid-State and Organic Lighting. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/soled.2010.jwa8.

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Salters, Bart, Michael Murdoch, Dragan Sekulovksi, Shih-Han Chen, and Pieter Seuntiens. "An evaluation of different setups for simulating lighting characteristics." In IS&T/SPIE Electronic Imaging. SPIE, 2012. http://dx.doi.org/10.1117/12.912107.

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Uchida, Yuji, Tatsumi Setomoto, Tsunemasa Taguchi, Yoshinori Nakagawa, and Kazuto Miyazaki. "Characteristics of high-efficiency InGaN-based white LED lighting." In Photonics Taiwan, edited by I.-Wei Wu and Heiju Uchiike. SPIE, 2000. http://dx.doi.org/10.1117/12.389397.

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Chernyak, A. Sh, M. A. Fedorishchev, and A. B. Kuznetsova. "OPTIMISATION OF A MOBILE METHOD FOR MEASURING ROAD LIGHTING CHARACTERISTICS (LUMINANCE AND ILLUMINANCE)." In CIE 2021 Conference. International Commission on Illumination, CIE, 2021. http://dx.doi.org/10.25039/x48.2021.po34.

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In today's urban environment it is extremely difficult to perform road lighting measurements using standard stationary methods. The mobile measurement method remains, in fact, the only possible way of assessing the quality of outdoor lighting. The presented work is aimed at improving the existing measurement methods in terms of quality, speed of measurement and safety of personnel.
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Kirsch, Raphael, and Marian Leifert. "AUTOMATED MEASUREMENT OF LED DIMMING CHARACTERISTICS." In CIE 2017 Midterm Meetings and Conference on Smarter Lighting for Better Life. International Commission on Illumination, CIE, 2018. http://dx.doi.org/10.25039/x44.2017.po39.

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Tsankov, Plamen, and Milko Yovchev. "Study of the Electrical Characteristics of Light-Emitting Diode Luminaires at Amendment of the Supply Voltage." In 2018 Seventh Balkan Conference on Lighting (BalkanLight). IEEE, 2018. http://dx.doi.org/10.1109/balkanlight.2018.8546890.

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Lee, Z. S., Z. C. Feng, H. Tsai, J. Yang, A. G. Li, L. C. Chen, K. H. Chen, Y. F. Chen, I. T. Ferguson, and W. Lu. "Optical and structural characteristics of high-performance InGaN/GaN multiple quantum well light-emitting diodes: effects of nano-structural features." In Manufacturing LEDs for Lighting and Display, edited by Thomas P. Pearsall. SPIE, 2007. http://dx.doi.org/10.1117/12.758980.

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Reports on the topic "Lighting characteristics"

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Kramer, Robert. LED Street Lighting Implementation Research, Support, and Testing. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317274.

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This report describes the results of technical analysis, field tests, and laboratory tests that were performed for LED highway lighting options by the Energy Efficiency and Reliability Center (EERC) at Purdue University Northwest for the Indiana Department of Transportation (INDOT). This effort was conducted over the past 3 years to evaluate and test the technology and viability of using modern highway lighting technology to enhance energy efficiency, safety, security, and economic development of communities and roadways. During the testing period there was a continuous discussion between INDOT and EERC regarding the laboratory and field testing of INDOT approved luminaires submitted by vendors. There were multiple discussions with INDOT and vendors regarding the individual details and issues for the 29 luminaires that were tested. A comparison study was conducted by EERC of the various alternatives and comparison to currently installed luminaires. Data was collected for field tests of the luminaires by EERC and INDOT personnel for the luminaires. Field data was evaluated and compared to lighting models using vendor supplied ies data files. Multiple presentations were made at 3 separate Purdue Road Schools regarding the results and procedures of the testing program by EERC in conjunction with INDOT. A total of 22 final reports, considered confidential by INDOT, for individual vendor luminaires have been prepared as part of this effort. These reports were submitted sequentially to INDOT as testing was completed during the course of this effort. A total of 29 luminaires were tested. Some luminaire testing was terminated during testing due to design issues or vendor requests. All testing was summarized in the INDOT specification sheet attached to each report. Observations regarding the consistency of the supplied test luminaire with the requirements of Section 7.2 of the INDOT test procedure “Procedure for evaluation and approval list requirements for solid state ballasted luminaires ITM 957-17P” is provided in the Appendix to the report for each luminaire. Details regarding how these tests were performed and the respective associated evaluation of performance and reliability are provided in the report. This effort included: consideration of published and vendor information; appraisal of products consistent with national industry standards; review of physical design, thermal performance; laboratory testing of photopic performance, reliability, life cycle data and characteristics, and power characteristics; technical and probabilistic risk studies; and field testing and analysis of LED light sources including comparison to currently installed conventional light sources. Assistance in preparing INDOT standards for highway lighting was provided on multiple occasions.
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Kersh, Steve. “Catastrophic Hail Storm & Lightning Characteristics From It”. Office of Scientific and Technical Information (OSTI), August 2020. http://dx.doi.org/10.2172/1777980.

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Warne, Larry Kevin, Edward Bystrom, Roy Eberhardt Jorgenson, Sandra L. Montoya, Kimball O. Merewether, Rebecca Sue Coats, Leonard E. Martinez, and John M. Jojola. Protection characteristics of a Faraday cage compromised by lightning burnthrough. Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1038196.

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MacGorman, Donald R. Retrieval and Assimilation of Storm Characteristics from Both In-Cloud and Cloud-to-Ground Lightning Data to Improve Mesoscale Model Forecasts. Fort Belvoir, VA: Defense Technical Information Center, September 2005. http://dx.doi.org/10.21236/ada438544.

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