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Pratiwi, Niniek, and Abdi Gunawan Djafar. "Lighting Optimization of Karawo Production House." International Journal of Built Environment and Scientific Research 6, no. 1 (2022): 33. http://dx.doi.org/10.24853/ijbesr.6.1.33-44.
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Karawo embroidery processes are carried out without using machine technology. This research aims to optimize the lighting of the Gorontalo karawo fabric production house. The method used is by surveying, conducting direct measurements, and distributing questionnaires. A simulation is carried out using Dialux Evo 9.0 in existing conditions and after the addition of lights. Simulation measurement shows an average lighting value of 461.3 lux from 07.00 to 17.00. The result does not meet the SNI 16-7062-2004 for fine work, which is a minimum of 1000-2000 lux. Based on the measurements on the field, it was found that the lighting level only ranged from 22.19 lux to 30.78 lux. According to the karawo craftsmen, 33% had headaches and eye pain during the production process, and 33% had eye pain. Moreover, based on the simulation with the light on, the average intensity is 1107.4 lux and reached the specified standard.
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Rojanasiri, Panwadee, and Nuanwan Tuaycharoen. "EFFECT OF LIGHTING LEVELS AND LAMP TYPES FOR CRIME PREVENTION IN THAI PEDESTRIAN WALKWAYS." Suranaree Journal of Science and Technology 30, no. 6 (2024): 010259(1–9). http://dx.doi.org/10.55766/sujst-2023-06-e0129.
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The effects of illuminance level and lamp type were investigated for crime prevention in Thai pedestrian walkways aimed to examine the effects of illuminance on perceived safety, pedestrian behaviour, and criminal identification as part of crime prevention. Laboratory tests were carried out at the Faculty of Architecture, Kasetsart University. Five levels of illuminance: 10, 20, 50, 100, and 200 lux, and the types of lamps—HPS, LED Daylight and LED Warm White were investigated. Experimental tests were performed using a 3D model with DIALux simulation. Results showed that each lamp type required a different illuminance to optimize crime prevention. The HPS lamp with an illuminance of 200 lux was found to be the most suitable level for perceived safety, while 10 lux was suitable for pedestrian behaviour and 10 lux was suitable for criminal identification. For the LED Daylight lamp, the illuminance of 200 lux was the most appropriate level for perceived safety, while 20 lux was suitable for pedestrian behaviour and 10-20 lux was enough for criminal identification. For the LED Warm-white lamp, the illuminance of 10 lux was the most appropriate level for perceived safety, with 20 lux for pedestrian behaviour, and 10-20 lux for criminal identification.
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Pinthoko Nugroho. "Effect of the Reflective Interior Elements on the Illuminance Level in Classrooms". Journal of Artificial Intelligence in Architecture 1, № 2 (2022): 42–49. http://dx.doi.org/10.24002/jarina.v1i2.6127.
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Lighting is one of the essential aspects of architectural design because it is crucial for room ambiance. Artificial and natural lighting affect the architectural element and the furniture. Using simulation tools is beneficial for measuring the reflective level of furniture elements to the room's lighting. DIALux Evo3 is computer software to support artificial and natural lighting simulation for interior spaces up to a particular room standard. This study uses the DIALux Evo3 software to conduct the trial-anderror process. The level of reflection on an interior element affects the lux value. This study will focus on the aspects of the ceiling, chairs, and table furniture using the trial and error method by simulating until a difference looms. The focus simulation focuses on setting the reflective coating in the DIALux Evo3 software on ceiling elements, chairs, and tables. The literature method examines aspects of DIALux Evo3 and the points measured in the simulation process. This simulation uses 15 lamps. This study aims to prove that the choice of paint finishing affects the results produced by the vertical illuminance (adaptive) parameter and utilizes technology in architecture. The conclusion is that interior elements such as ceilings, chairs, and tables with reflective elements affect the artificial light. The aspect with low reflectivity requires a high lux value compared to architectural and interior components with high reflectance
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Satrio, Yogi Waliy, Muhammad Fahreza, and Amani Darma Tarigan. "ANALISIS PENCAHAYAAN LAMPU PENERANGAN JALAN UMUM (LPJU) PADA JALAN TOL SEMAYANG." Power Elektronik : Jurnal Orang Elektro 13, no. 2 (2024): 275–79. http://dx.doi.org/10.30591/polektro.v13i2.6628.
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Several issues with public street lighting are often found and do not meet the Indonesian National Standard (SNI). Common problems include uneven spacing between streetlight poles, improper pole heights, poorly organized streetlight installations, and incorrect selection of lamp types and wattages according to the SNI standards. The lack of streetlights on busy road sections results in inefficient operation and discomfort for road users due to inadequate light intensity at the streetlight locations caused by various factors. To address these issues, solutions are needed to improve the existing situation, including energy-saving measures for public street lighting. Some necessary actions include replacing non-compliant streetlights and conducting evaluations by relevant authorities after installation works are completed. The existing condition of streetlights along the Semayang Toll Road shows an average illumination level produced by 150W SON-T lamps of 3.1 lux with light uniformity of 0.0, which does not comply with SNI 7391:2008. Simulation results using Dialux 4.13 software indicate that the average illumination level produced by Philips LED luminaires of 150W is 11 lux with a light uniformity of 0.106 lux, meeting SNI 7391:2008 requirements. Similarly, for Philips LED luminaires of 120W, the average illumination level is 11 lux with a light uniformity of 0.114 lux, thus meeting the standards. Based on the simulation results using Dialux 4.13 software, the use of 120W LED lamps for public street lighting on the Semayang Toll Road can lead to a 20% reduction in electricity consumption.
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Bhandary, Shashank Kishore, Rohit Dhakal, Vishwa Sanghavi, and Pavan Kumar Verkicharla. "Ambient light level varies with different locations and environmental conditions: Potential to impact myopia." PLOS ONE 16, no. 7 (2021): e0254027. http://dx.doi.org/10.1371/journal.pone.0254027.
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Purpose Considering that time spent outdoors is protective for myopia, we investigated how ambient light levels reaching the eye varies across 9 outdoor and 4 indoor locations in 5 different environmental conditions. Methods Illuminance (lux) was recorded using a lux meter under conditions of weather (sunny/cloudy), time of a day (7:00,10:00,13:00, and 16:00 hours), seasons (summer/winter), and sun protection (hat and cap) in outdoor and indoor locations. Nine outdoor locations were “open playground”, “under a translucent artificial-shade”, “under a porch facing east”, “under a porch facing south”, “under a big tree”, “between three buildings”, “within 4 buildings”, and “canopy”. As a ninth outdoor location, “Under a glass bowl” in the outdoor location was used as a simulation for “glass classroom model” and measurement was taken at the floor level only to determine in overall the illuminance conditions with glass covered on all sides. The 4 indoor locations included “room with multiple large windows”, “room with combination light source”, “room with multiple artificial lights”, and “room with single artificial light”. Results The overall median illuminance level (median; Q1-Q3) recorded in 9 outdoor locations was 8 times higher than that of all indoor locations (1175;197–5400 lux vs. 179;50–333 lux). Highest illuminance in outdoor locations was recorded in “open playground” (9300;4100–16825 lux), followed by “under a translucent artificial shade (8180;4200–13300 lux) and the lowest in “within 4 buildings” (11;6–20 lux). Illuminance under ‘Canopy’, ‘between three buildings’ and ‘within four buildings’ was similar to that of indoor locations (<1000 lux). Time of the day, weather, season, sensor position and using sun protection did not alter illuminance to change from high to low level (>1000 to <1000 lux). Among indoor locations, illuminance in “room with multiple large windows” crossed 1000 lux at a specific time points on both sunny and cloudy days. Conclusions Illuminance levels in outdoors and indoors varied with location type, but not with other conditions. Given the variation in illuminance in different locations, and the impact it may have on myopia control, appropriate detailed recommendations seems necessary while suggesting time outdoors as an anti-myopia strategy to ensure desired outcomes.
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Ardyanny, Yuninda Mukty. "DAYLIGHT OPTIMIZATION IN A CAFÉ THROUGH WINDOW TO WALL RATIO AND ILLUMINANCE ANALYSIS: A CASE STUDY OF BREW AND CHEW CAFÉ IN BANDUNG, INDONESIA." MODUL 23, no. 2 (2023): 110–15. http://dx.doi.org/10.14710/mdl.23.2.2023.110-115.
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Daylighting is essential for enhancing the lighting ambiance and ensuring occupants' visual comfort in a café. Nowadays, a café is not only a leisure destination, but also becomes a preferred place for people working remotely. Consequently, the necessity for proper daylighting in a café becomes crucial to achieve customers' visual comfort. Regarding daylighting, windows play a pivotal role in bringing natural light into a building. Thus, the Window-to-Wall Ratio (WWR) percentage has a significant impact on the illuminance level within the building. To prevent visual discomfort, the Leadership in Energy and Environmental Design (LEED) v4.1 Standard for daylight measurement will serve as the parameter to achieve an acceptable level of illuminance, ranging between 300 lux and 3,000 lux at both 9 AM and 3 PM. The objective of this research is to determine the optimal WWR percentage in a case study café to achieve an acceptable illuminance level based on the LEED v4.1 standard, using Velux as the simulation software. The research methodology involves measuring the existing illuminance level of the case study café using a lux meter to validate the building simulation results. Subsequently, the 3D model of the café will be simulated in Velux with varying Window-to-Wall Ratios (WWR) to identify the optimal WWR that aligns with the LEED v4.1 standard for daylight measurement.
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Chandra, Tiffany, and Abd Rachmad Zahrial Amin. "SIMULASI PENCAHAYAAN ALAMI DAN BUATAN DENGAN ECOTECT RADIANCE PADA STUDIO GAMBAR; KASUS STUDI: STUDIO GAMBAR SEKOLAH TINGGI TEKNIK MUSI PALEMBANG." Jurnal Arsitektur KOMPOSISI 10, no. 3 (2017): 171. http://dx.doi.org/10.24002/jars.v10i3.1112.
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Abstract: Natural lighting comes from the sun, while the artificial lighting comes from artificial light (lamp). Lighting is needed to do the activities in a room, whether it is natural or artificial lighting. The amount of natural lighting depends on the location and the dimension of windows as well as the direction of the trajectory of the sun. Window, which has a larger opening, will allow much sun light. Artificial lighting depends on the types of lamp and the power of light transmission (watts). If the power of light transmission is greater, the light will be brighter. Certain activities will need different illumination level. The standard of illumination level for the studio of drawing is 750 lux because the activities require high precision. In the initial study to determine whether the lighting conditions in the studio has already met the requirement of illumination level, luxmeter is used to measure the illumination level for three days. The result of the measurement indicates that the natural lighting, which is available today, has not reached 750 lux. This study uses Ecotect Radiance Simulation Program to improve natural and artificial lighting in the studio of drawing. To achieve the actual results of the simulation of artificial lighting, the simulation uses Erco lights series LED White 72689.000 Opton which is placed 2.5 meters from the floor. The simulation shows that the average value of random samples is 1749, 7 lux. Simulation of the natural lighting uses the climate of Palembang city. Therefore, it is advisable to replace the existing artificial lighting with the lights.Keywords: natural lighting, artificial lighting, architectural drawing studioAbstrak: Pencahayaan alami adalah pencahayaan yang bersumber dari sinar matahari, sedangkan sumber pencahayaan buatan berasal dari sinar buatan (lampu). Sebuah ruang dengan segala aktivitas didalamnya membutuhkan pencahayaan, baik itu alami maupun buatan. Pencahayaan alami yang masuk ke dalam ruangan dipengaruhi oleh letak dan ukuran jendela, serta arah lintasan matahari. Semakin besar bukaan pada jendela, maka cahaya yang masuk akan semakin besar pula. Pencahayaan buatan yang maksimal dipengaruhi oleh jenis lampu dan kekuatan daya pancar (watt). Semakin besar daya yang digunakan, maka lampu tersebut akan semakin terang. Fungsi ruang yang berbeda akan membutuhkan tingkat iluminasi yang berbeda. Tingkat iluminasi standar untuk ruang studio gambar adalah 750 lux karena termasuk aktivitas yang membutuhkan ketelitian tinggi. Pada penelitian awal, yang dilakukan untuk mengetahui apakah kondisi pencahayaan pada ruang studio gambar telah memenuhi standar, dilakukan pengukuran dengan menggunakan luxmeter selama tiga hari. Hasil dari pengukuran tersebut menunjukkan bahwa pencahayaan alami yang ada saat ini belum mencapai 750 lux. Pada penelitian ini dilakukan simulasi dengan program Ecotect Radiance untuk memperbaiki pencahayaan alami dan buatan pada ruang studio gambar. Untuk mendekati hasil sebenarnya dalam simulasi pencahayaan buatan, digunakan lampu Erco seri Opton LED White 72689.000 yang diletakkan setinggi 2,5 meter dari lantai. Dari simulasi ini, diperoleh nilai rata-rata dari sampel acak sebesar 1749,7 lux. Simulasi pencahayaan alami menggunakan iklim kota Palembang. Oleh karena itu, disarankan untuk mengganti pencahayaan buatan yang ada saat ini dengan lampu tersebut.Kata kunci: pencahayaan alami, pencahayaan buatan, studio gambar
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Angelica, Felicia Ranita, Liliany Sigit Arifin, and Feny Elsiana. "Daylight Performance of Fiber Optic Daylighting in Deep Plan Office Room." DIMENSI (Journal of Architecture and Built Environment) 50, no. 2 (2023): 81–98. http://dx.doi.org/10.9744/dimensi.50.2.81-98.
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Most buildings have spaces far from the windows that require artificial lighting for illumination throughout the day. In fact, artificial lighting contributes to the second highest electrical energy consumption, especially in educational institutions that require more lighting. One of the appropriate solutions to illuminate areas far from windows is using a fiber optic daylighting system. FOD is used to distribute sunlight into the spaces away from the window. This research tested the lighting levels produced by alternative collector and diffuser models of FOD systems to meet the lighting level standards (lux) in discussion room P. 06. 05. Petra Christian University. This research uses experimental methods under actual weather exposure and simulation with DIALux software. Simulation results show that the room requires 6 collectors and 2 diffusers, arranged centrally and symmetrically. It produces 365 lux and a uniformity ratio of 0.59, which meets the standard. The lighting level data used was at 10:30 AM during partially cloudy conditions.
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Wing Siong Lee, Asiah Ismam, Faris Kamaruzaman, Yi Leang Lim, and Keng Wai Chan. "Simulation Study of a Smart Factory Lighting and Shading System." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 98, no. 1 (2022): 116–24. http://dx.doi.org/10.37934/arfmts.98.1.116124.
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Insufficient and uneven light distribution in the workplace affect the quality of work that requires high precision. In addition, inadequate lighting not only affects the health of workers but is also linked with a condition called 'Sick Building Syndrome'. The artificial light in factories is commonly manually controlled, resulting in energy wastage. Hence this paper presents a smart lighting and shading system to create both comfort lighting and energy-efficient factory environment. Three-dimensional modelling simulations were built using Tinkercad and Revit. The control system built utilizes the motorized skylight solar shades and the artificial high LED Bay, which able to adapt with the fluctuating factory lighting condition. If the light enters the factory through the motorized shade on the factory ceiling is insufficient or uneven, the artificial light will be switched on. The implementation of both mechanisms managed to improve the light distribution evenness and keep the light intensity level in the factory in the range between 885 lux and 1306 Lux from 9am to 6pm, while from 6pm onwards at average of about 900 lux. Furthermore, the electrical energy consumption is reduced significantly during the daytime as the control system has utilized the sunlight as part of the light source for the factory. The smart system can save as much as 22.39%, or 55.2128kWh from 9am to 7pm. In conclusion, the smart lighting and shading control system has proven the effectiveness theoretically, and the objectives were achieved.
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Filea Martha Budiarti, Popi Puspitasari, and Khotijah Lahji. "NATURAL LIGHTING’S CONTOUR, CASE: CLASSROOM-STUDIO, FLOOR 6th BUILDING C, UNIVERSITAS TRISAKTI." International Journal on Livable Space 7, no. 1 (2023): 19–23. http://dx.doi.org/10.25105/livas.v7i1.16751.
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The room requires specific lighting according to its function. One way to achieve the room's optimal comfort is to adjust the natural or artificial lighting to the required standards. This research aims to study daylight intensity in the architectural classroom studio on the sixth floor of Building C Universitas Trisakti and compare it with the illuminance level requirements stipulated in SNI 6197: 2011. This study hypothesizes that the natural intensity of the room, which also functions as an architectural drawing studio, is incompatible with conventional lectures. The measuring instrument was the Lutron LM 8000A Light Lux Meter, while the natural lighting contour simulation used Dialux Evo 9. The results show that the measured natural lighting intensity is unevenly distributed. There are bright zones in the room that exceed the standard value of the illuminance level (> 350-750 lux) and dark zones that are below the standard of illuminance (<350-750 lux), with a distance of 0.5 m - 3m from a row of window openings as a source of lighting.
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Manyurang, Agityawan Ranga, and Bambang Sudibya. "Evaluasi Sistem Pencahayaan dan Penggunaan Energi Listrik pada Lampu Sorot di Gelanggang Olah Raga Kridosono Yogyakarta." AVITEC 4, no. 1 (2022): 13. http://dx.doi.org/10.28989/avitec.v4i1.1128.
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Kridosono Yogyakarta sports building is one of the sports facilities in the Kotabaru Yogyakarta. As the function of the exercise routine for this sports building is basketball and volleyball, the use at night of course uses an artificial lighting system. Artificial lighting, especially spotlights that have been installed based on information from the sports building manager, is still lacking in the sense of lack of light. For this reason, this study aims to evaluate the lighting system and calculate the use of floodlight electrical energy after and before the evaluation. The results showed that the average lighting level in the Kridosono Sports Building Yogyakarta did not meet the minimum standard of 200 Lux. Recommendations through the calculation of lighting levels obtained results of 211.2 lux and 202.75 lux. For the DIALux 4.13 simulation using a Philips BVP130 1xLED210/740 spotlight and a Philips BVP130 1 xLED172/830 spotlight, the results are 240 lux and 230 lux. The total electrical energy consumption of the floodlights before the evaluation was 752 kWh/month and after being re-planned by replacing the spotlights using Philips BVP130 1xLED172/830 of 678.3 kWh/month so as to save electrical energy by 9.8% and using Philips BVP130 spotlights 1xLED210/740 electricity consumption is 670kWh/month so that it saves electrical energy by 10.9%.
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Puspita, Wieke Oksi, Zidanendra Fidel Abidin, Nabilla Febriani Khairunisya, and Beta Paramita. "ANALYSIS OF NATURAL DAYLIGHTING AT GPIB BETHEL BANDUNG USING DIALUX EVO 10.1 SIMULATION." Journal of Development and Integrated Engineering 3, no. 1 (2023): 53–64. http://dx.doi.org/10.17509/jodie.v3i1.67518.
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Natural daylighting comes from sunlight that is reflected from outside into the building and plays an important role for the building. One of the buildings that must have good natural lighting is the Church. Natural lighting is needed to support religious activities in the Church from a functional and architectural point of view by giving a certain meaning or aesthetic value. Based on the applicable standards, the church as a place of worship has a minimum requirement of 200 lux lighting (SNI) 03-6197-2000. This study aims to determine the suitability level of natural lighting in the church with applicable standards. The method used in this study is a quantitative method with data acquisition through direct observation and simulated using DIALux Evo 10.1 software. Simulation results data in the form of lux calculations and lighting distribution. Based on the simulation results, it was found that natural lighting at GPIB Bethel Bandung did not meet the applicable standards for two effective times. Therefore, a response is needed to overcome this by increasing the number and width of window openings.
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Park, Doo-Yong, Hyun-Je Lee, Su-In Yun, and Sang-Min Choi. "Simulation Analysis of Daylight Characteristics and Cooling Load Based on Performance Test of Covering Materials Used in Smart Farms." Energies 14, no. 19 (2021): 6331. http://dx.doi.org/10.3390/en14196331.
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In this study, seven of the most commonly applied covering materials in smart farms are selected as the representative samples for analysis, namely, glass, soft film (polyethylene, PE), soft film (polyolefin, PO), rigid plastic film (ethylene tetra fluoro ethylene, ETFE), rigid plastic sheet (poly methyl methacrylate, PMMA), rigid plastic sheet (polycarbonate, PC double layer), and woven film. For each covering material, visible light transmittance and reflectivity, solar radiation transmittance and reflectivity, thickness, solar heat gain coefficient, and the coefficient of heat transmission are measured according to the test methods in the Korean Industrial Standards (KS) to derive input data for the respective materials. In addition, using the optical and thermal input data as derived above, simulations are performed on the cooling load and daylight characteristics of smart farms to derive basic reference data for the selection of adequate covering materials for the design. Based on the analysis result of the daylight characteristics for each covering material, for a shading rate of 60%, the average values of indoor illuminance were 19,879 lux, 20,012 lux, 19,393 lux, 19,555 lux, 16,560 lux, 16,228 lux, and 11,173 lux for glass, PE film, PO film, ETFE, woven film, PMMA, and PC double layer, respectively, between 6 a.m. and 8 p.m., which correspond to the hours when daylight enters indoor spaces. Considering the target light intensity for strawberry growth at 10,000–40,000 lux, the above results confirm that all the sample covering materials had an indoor illuminance level above the lower limit range of the target light intensity. For the cooling load evaluation, the PC double layer had the lowest value of 482.8 W/m2, and PO film had the highest value of 633.8 W/m2. The difference between the cooling loads of the PC double layer and the PO film is 151 W/m2, which amounts to 23.8%, thus indicating that the selected covering material significantly impacts the cooling load. The cooling load exhibited a pattern similar to that of the coefficient of heat transmission and solar heat gain coefficient, which are key influencing factors for most of the sample materials. However, for PMMA, the cooling load was low because it had a higher coefficient of heat transmission than other materials, but its solar heat gain coefficient was relatively low. Another possible reason for the difference is that the solar heat gain coefficient impacts the cooling load. When the cooling set temperature was controlled from Case 1-1 to Case 1-2, the cooling load decreased by 10.7% on average. In addition, when the cooling set temperature changed from Case 1-1 to Case 1-3, the cooling load decreased by 26.1% on average. For cooling set temperature control, maintaining the temperature around the lower temperature range of the optimal growth temperature of the plants increases the yield, but it also incurs increased cooling load and cost. In terms of cost only, while maintaining the cooling temperature for 24 h at 30 °C, which is the upper limit of the optimal growth temperature, would be advantageous, it will lead to a deterioration of the quality and reductions in yield. Therefore, as follow-up studies for further investigation of the findings of this research, there is the need for an evaluation of the yield and quality with respect to the range of cooling set temperatures. When the internal shading rate was increased to 40% (Case 2-2) with reference to Case 2-1, which was a greenhouse without the application of internal shading, the cooling load decreased by 27.4% on average. Furthermore, when the internal shading rate increased to 50% (Case 2-3) with reference to Case 2-1, the cooling load decreased by 29.3% on average. When the internal shading rate increased to 60% (Case 2-4), the cooling load decreased by 31.5% on average.
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Apriliandy, M. Tesar, and Achmad Budiman. "Reliability Evaluation of Electric Power Generation PLTS System on Public Street Lighting Tarakan City." Journal of Emerging Supply Chain, Clean Energy, and Process Engineering 3, no. 1 (2024): 57–67. http://dx.doi.org/10.57102/jescee.v3i1.75.
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Public street lighting (PJU) is a lighting lamp that is public (for the common good) and is usually installed on the road. Solar Public Street Lighting (PJU-TS) is a public street lighting where the electrical power for the lights is supplied by a Stand Alone system that uses solar energy. In this study, measurements of sunlight, lamplight intensity, and lamppost height were carried out on 24 PJU-TS units spread across 4 sub-districts in Tarakan city. Furthermore, simulating PJU-TS using Matlab Simulink to determine the level of reliability based on the use or usage of batteries in PJU-TS. Based on the regulation of the Minister of Transportation of the Republic of Indonesia Number PM 27/2018 concerning Street Lighting Equipment that the lighting level of PJU-TS lamps is 3-6 lux and based on recommendations from the Reliability Standard Power Plant that the reliability value is at least 80%. The results of this research simulation that PJU-TS that meets the standards of the Minister of Transportation of the Republic of Indonesia Number PM 27/2018 amounted to 3 units of 3-6 lux, 40 W lamps, lamp working hours 11 hours 14 minutes, 300 WP solar modules, solar charge controller current 15.72 A, 40 Ah batteries, battery working hours 13.72-18.68 hours, percentage of Ah battery usage 46.42% - 95%. In addition to meeting the standards of the Minister of Transportation of the Republic of Indonesia Number PM 27/2018, the results of this simulation also meet the Reliability Standard Power Plant recommendations with reliability exceeding 80%, namely 81.27% - 100%. Meanwhile, 21 units of PJU-TS do not meet the standards of the Minister of Transportation of the Republic of Indonesia Number PM 27/2018 concerning Street Lighting Equipment and Reliability Standard Power Plant recommendations.
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Ghonimi, Islam. "Assessing Daylight Performance of Single vs. Double Skin Façade in Educational Buildings: A Comparative Analysis of Two Case Studies." Journal of Sustainable Development 10, no. 3 (2017): 133. http://dx.doi.org/10.5539/jsd.v10n3p133.
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The bulk of research on the performance of double skin facade is carried out in moderate climate with concern to ventilation and thermal performance. This research concerns day-light performance of double skin facades in hot arid zones, in Educational Buildings. This investigation adopts an inductive method using comparative analytical approach to convert general intuitions on the daylight performance of a double skin facade, in hot arid areas, into the grounds of understanding its performance based on research.Based on two case studies of lecture halls; the first with Single Skin Façade (SSF) and the second with Double Skin Façade (DSF); the impact of double skin façade on lighting performance is examined. The Protocol was applied to south facing models under overcast sky conditions to test significant effects of double skin façade on illumance values inside the lecture halls. Simulation results indicate that a double skin facade can achieve high lighting performance with better energy savings than a single skin façade; also the basic characteristics of width and distance of two walls are examined. It was expected that DSF fail to meet the acceptable standard indoor illuminance requirement of 200 to 300 lux. Comparing the single and double skin facade, the area percentage of the lecture hall, which covered with acceptable illumination level of 200 to 300 lux, are found in range of 10%, 50% respectively. In addition, the area percentage of the lecture hall, which covered with acceptable illumination level of 100 to 300 lux, is found in range of 30%, 80% respectively.
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Udhwani, Lokesh, Archana Soni, Erdem Cuce, and Sudhakar Kumarasamy. "Optical Fiber Technology for Efficient Daylighting and Thermal Control: A Sustainable Approach for Buildings." Eng 5, no. 4 (2024): 2680–94. http://dx.doi.org/10.3390/eng5040140.
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Different direct solar harvesting systems for daylighting are being explored to achieve high uniform illumination deep within buildings at minimal cost. A promising solution to make these systems cost-effective is the use of plastic optical fibers (POFs). However, heat-related issues with low-cost POFs need to be addressed for the widespread adoption of efficient daylighting technologies. Previous studies have explored solutions for this overheating problem, but their effectiveness remains uncertain. This study proposes a low-cost fiber optic daylighting system integrated with a newly patented mechanical component designed to secure the fiber optic bundle at the focal point, providing three levels of heat filtration while ensuring uniform illumination. Our methodology involves selecting a small area, installing the setup, and measuring both heat and light readings, followed by validation through software simulations. The operational principle of this technology is explained, and experimental tests using lux meters and infrared thermometers were conducted to investigate the system’s characteristics. The three-level heat filtration device reduces temperature by approximately 35 °C at the surface of the optical fiber, and the average illumination of the room is around 400 lux. These results were further verified using RELUX simulation software. The findings demonstrate the promising potential of this new device in solar heat filtration and achieving uniform illumination. Recommendations for mitigating overheating damage and exploring heat filtering possibilities in new parabolic solar daylighting systems for further research are also provided.
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OYELEYE, M.O.1 &. ALE T.O 2. "COMPARATIVE EVALUATION OF LIGHTING DESIGN SOFTWARES AND EXCEL LUMEN COMPUTATIONAL (ELC) METHOD." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 8, no. 8 (2019): 107–15. https://doi.org/10.5281/zenodo.3377416.
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This research focus on multipurpose-hall interior lighting design, using two lighting design softwares and Excel Lumen Computational (ELC) method of lighting design without considering day-light. This is to ascertain the overall benefits of lighting design software as compared to ELC method. AutoCAD architectural drawings of the building was obtained for floor plan dimensions. The building was categorized into seven different spaces and the lux level of the spaces considered varies. The used softwares were downloaded. Utilization factor is not visible for the user and maintenance factor is fixed (0.85) in Dialux while it is 0.6 and 0.8 respectively in Relux which is variable. The utilization and maintenance factor used in the ELC method is 0.7 and 0.8 respectively. AutoCAD was used to measure irregular shapes. 2018/2019 catalogue of a reputable manufacturer was used for lamp selection. None of the selected lamp was accessible in the softwares. All the selected lamps were accessible in ELC method. The former is characterized with difficulty to access selected lamp specifications, a lot of time and energy were devoted for searching and downloading the softwares without any useful result. These softwares are monetary. ELC method overrides these shortcomings thus recommends in this work.
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Bora, Rous, Nuanwan Tuaycharoen, and Ratchot Chompunich. "The Effect of Light Shelf and Translucent Ceiling on Daylighting Performance in Office Building in Thailand." International Journal of Building, Urban, Interior and Landscape Technology (BUILT) 21, no. 2 (2023): 51–60. http://dx.doi.org/10.56261/built.v21.251701.
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Daylight control strategies were a challenge for a high-rise building in terms of savingenergy consumption. Light shelf was one of the daylight control systems which was usuallyhorizontal or inclined surfaces, placed on the inner and/or the outer side of windows toreflect sunlight to ceiling and distribute the light deeper into the room. This study aimedto investigate the performance of daylight control strategies in office rooms using alight-self with translucent ceiling. The light shelf, which is typically horizontal or inclined,was placed on the inner or outer side of windows to reflect sunlight and distribute itdeeper into the room. The study investigated the effect of type of daylight techniqueswhich are a combination of different light shelves and translucent ceiling on daylightingperformance. The illuminance level in an office room was calculated using DIALux 4.13 andwas performed for working hours in Bangkok, Thailand. The simulation was performedunder clear sky conditions and using real climatic data from four orientations. Fivetypes of daylight techniques, including the existing room, were investigated in terms ofilluminance level and uniformity of daylight in the office room. The CIBSE (2015) and IESNA(2011) standards indicate that offices room should have uniformity of at least 0.8 andan illuminance level of 500 lux. Thus, the objective of this research was to determine thebest combination of light shelves and translucent ceilings for achieving illuminance anduniformity standards. The results showed that the external light shelf with a translucentceiling and static louver at 90o (option 4) was the best solution for office rooms, providingaverage illuminance level 776 lux (above the standard) and uniformity 0.4 (nearly thestandard). This conclusion suggests that a light-shelf with a translucent ceiling guidesdaylight deep into the room but less uniformity.
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Castaño, Fernando, Stanisław Strzelczak, Alberto Villalonga, Rodolfo E. Haber, and Joanna Kossakowska. "Sensor Reliability in Cyber-Physical Systems Using Internet-of-Things Data: A Review and Case Study." Remote Sensing 11, no. 19 (2019): 2252. http://dx.doi.org/10.3390/rs11192252.
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Nowadays, reliability of sensors is one of the most important challenges for widespread application of Internet-of-things data in key emerging fields such as the automotive and manufacturing sectors. This paper presents a brief review of the main research and innovation actions at the European level, as well as some on-going research related to sensor reliability in cyber-physical systems (CPS). The research reported in this paper is also focused on the design of a procedure for evaluating the reliability of Internet-of-Things sensors in a cyber-physical system. The results of a case study of sensor reliability assessment in an autonomous driving scenario for the automotive sector are also shown. A co-simulation framework is designed in order to enable real-time interaction between virtual and real sensors. The case study consists of an IoT LiDAR-based collaborative map in order to assess the CPS-based co-simulation framework. Specifically, the sensor chosen is the Ibeo Lux 4-layer LiDAR sensor with IoT added capabilities. The modeling library for predicting error with machine learning methods is implemented at a local level, and a self-learning-procedure for decision-making based on Q-learning runs at a global level. The study supporting the experimental evaluation of the co-simulation framework is presented using simulated and real data. The results demonstrate the effectiveness of the proposed method for increasing sensor reliability in cyber-physical systems using Internet-of-Things data.
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Karyono, Karyono, Badr Abdullah, Alison Cotgrave, and Ana Bras. "A Novel Adaptive Lighting System Which Considers Behavioral Adaptation Aspects for Visually Impaired People." Buildings 10, no. 9 (2020): 168. http://dx.doi.org/10.3390/buildings10090168.
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The number of visually impaired people and elderly people groups are significant, but the current lighting system used in buildings, which is based on the current standard, cannot provide the necessary lighting comfort for them. The lighting system should provide the correct illuminance for every activity and even pattern of light. This research presents the work in progress in developing the novel adaptive lighting system tailored for visually impaired people, which becomes the solution to the problem. The behavioral adaptation aspects and the experience and memory principle are taken into account in the system design. It also makes use of the latest independent adjustable artificial light (LED) technology, to get an even pattern of lighting, while still considering efficient energy usage. The proposed system structure uses a wireless sensor network (WSN), big data processing, and the Artificial Intelligence (AI) sub-system, which can predict and adaptively regulate the illumination level based on the occupant’s needs and routines. The initial simulation of the lighting model is presented in this paper. The simulation uses five scenarios in different seasons and daylight. The simulation shows satisfactory results for illuminance values 200, 250, 300, 500, and 750 lux, needed by the occupants.
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Hakim, Bhanu Rizfa, Ayu Asvitasari, and Feliksdinata Pangasih. "Optimasi Pencahayaan Alami pada Masjid Konsep Terbuka di Samarinda." ARSITEKTURA 22, no. 1 (2024): 55. http://dx.doi.org/10.20961/arst.v22i1.80066.
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<p><em>The mosque serves as a place of worship for the Muslim community and is imperative to possess an optimal level of comfort. Mosque design has evolved not only in terms of functionality but also in considering the comfort level through the utilization of natural lighting. The utilization of Natural Lighting emerges as a significant choice, particularly for mosques with expansive areas, facilitating energy conservation. Challenges in implementing natural lighting in mosque design, especially in open concepts, include temperature rise and glare effects that may disrupt worship comfort. Research methodology involves measuring the incoming light values using a lux meter and conducting thermal envelope measurements using a thermal camera (FLIR) within the spaces of the open-concept mosque, followed by simulation to devise a design for sunshade fins. The design of sunshade fins aids in temperature reduction while maintaining natural light penetration and mitigating glare issues in open-concept mosques.</em></p>
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Saputri, Fahmy Rinanda, Johanes Dimas Paramasatya, and Linus Gregorius Radithya. "APPLICATION OF SOFTWARE SIMULATION FOR LIGHTING ANALYSIS IN THE LAB. OF HOTEL OPERATIONS DEPARTMENT UMN." Jurnal Ilmiah Informatika Global 15, no. 2 (2024): 82–86. http://dx.doi.org/10.36982/jiig.v15i2.4395.
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In this study, an analysis of lighting in campus buildings was conducted, specifically for the in the Laboratory of Hotel Operations Department Universitas Multimedia Nusantara (UMN). The main issue identified is visual comfort for occupants in a room, which must comply with the Indonesian National Standard (SNI) 6197-2020. Ensuring proper lighting is crucial for both functionality and occupant comfort, particularly in educational settings where tasks require adequate illumination. The lighting analysis was performed through simulation using Dialux and SketchUp software. The process involved designing a detailed building model based on the room layout, including all relevant architectural and interior features. Once the model was completed, the lighting simulation was executed using Dialux. This simulation entailed determining the optimal position of furniture within the room, selecting appropriate types of luminaires, and strategically placing these luminaires to achieve the desired lighting levels. The results of the simulation indicated that the current lighting levels in the laboratory were below the standards set by the SNI. Specifically, the minimum illumination level required by SNI 6197-2020 for a room functioning as a restaurant kitchen, which is analogous to the that Laboratory, is an average of at least 250 lux. The findings highlight the need for redesigning the lighting system in the laboratory to meet the prescribed standards and ensure adequate visual comfort and functionality for its users.
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Hasan, Md, Md Ashikujjaman, Sayma Khandaker, Norizam Sulaiman, and Hadi Manap. "Enhancing energy efficiency: A case study of lighting retrofit systems in Malaysian university environments." Facta universitatis - series: Electronics and Energetics 37, no. 3 (2024): 455–74. https://doi.org/10.2298/fuee2403455h.
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With an enormous potential for demand reduction, lighting is one of the main variables influencing demand of electricity in the building energy industry. In this work, laboratory lighting systems for a Malaysian university are used as a case study to discuss the challenges of designing an efficient lighting system for educational spaces. Experimental results indicate that the university laboratories receive more than 300 lux of light from the present lighting system and natural light during the day, under clear, average, cloudy, and night circumstances, respectively, for instructional purposes. The illuminance requirement is exceeded by the presently installed lighting system. This exceeding illuminance level was discovered to be mostly caused by the excessive amount of installed light. Based on simulation results, it is possible to save a significant amount of energy, money, and greenhouse gas emissions by installing well-arranged light emitting diode (LED) tube lights with a 0.8 maintenance factor.
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Demydov, Oleksandr, Leonid Kosenko, Olena Koval, and Euhenii Yurchenko. "Research and simulation of an office lighting." Ventilation, Illumination and Heat Gas Supply 49 (July 25, 2024): 7–15. http://dx.doi.org/10.32347/2409-2606.2024.49.7-15.
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This research thoroughly examines the evaluation and optimization methods of office lighting aimed at improving energy efficiency and the working environment through the implementation of advanced lighting technologies. Including a comprehensive technical survey of existing lighting conditions, the development of scientifically substantiated recommendations takes into account regulatory requirements and contemporary practices in the field of lighting technology. An analysis of lighting efficiency, selection of optimal light sources, calculation of their placement for maximum efficiency, and assessment of the impact on energy savings are performed, with the goal of achieving better working conditions and reducing energy consumption. The study includes the following steps: illuminance as a critical factor affecting employee productivity and comfort; technical survey of the lighting system in the office space; methodology for conducting the technical survey – measurements of illuminance in different areas of the space using a lux meter; assesment of the need for luminous flux according to norms and standards for office spaces; selection of the type and power of LED lamps for the new lighting system; calculation of the number and placement of LED lamps to provide the necessary level of illuminance in the automated system DIALux Evo Pro; assessment of the expected results in the context of energy savings and improvement of working conditions; calculation of energy expenditures for the new lighting system; potential impact of the research results on energy management and energy audit in the construction sector. The research conclusions suggest strategies for the implementation of an innovative lighting system, which leads to the optimization of energy consumption and significant improvement of lighting quality. These strategies are expected not only to improve the working environment but also to lead to substantial energy resource savings in offices, thereby promoting ecological sustainability and financial efficiency.
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Hajji, Apif M., Shidiq Y. Satria, and Imam Alfianto. "The Analysis of Natural Lighting-based Visual Comfort for Classrooms Building by Using Velux Daylight Visualizer." E3S Web of Conferences 576 (2024): 05002. http://dx.doi.org/10.1051/e3sconf/202457605002.
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This study aims to determine the level of natural lighting at a school building carried out with the use of the Velux Daylight Visualizer (VDV) software. VDV is a software for analysing natural lighting on building model. The output is Daylight Factor (DF) or Daylight Natural Lighting Factor and Illumination (E). E value is the main indicator of the level lighting and visual comfort in the room by referring to simulation results referring Indonesian’s Standard of SNI 03-2396-2001 for visual comfort. Results shown the existing conditions in the classroom have a low level of lighting with majority measurement points having average lighting level below 250 lux. To improve the natural lighting quality in the classrooms, variations of walls-to-windows ratio (WWR) applied the model. The variation of WWR is conduct an experiment to substitute its value in regression equation. With the increasing size of the opening at WWR 30%, the distribution of DF values at measurement distance 1 meter and 2 meters increases compared to WWR 20%. Trend also continues to occur at WWR 40% to WWR 60%, the DF value has increased quite significantly, especially at several points blocked by walls or meeting points between light from 2 adjacent windows.
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Khoirunnisa, Arju, Adi Safyan, and Fidyati Fidyati. "Analisa Pencahayaan Alami Ruang Kelas pada Sekolah SMA N-1 Tanjung Pura Menggunakan Dialux Evo 11.1." ETNIK: Jurnal Ekonomi dan Teknik 2, no. 11 (2023): 996–1004. http://dx.doi.org/10.54543/etnik.v2i11.261.
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Natural lighting (Daylighting) is the use of natural light as the main source of sunlight for lighting. In an educational environment, the classroom is the space that is most frequently used compared to other spaces. Therefore, adequate lighting is needed to support teaching and learning activities inside. Based on observations at SMA N-1 Tanjung Pura, classrooms tend to have low lighting levels, which are influenced by factors such as vegetation, surrounding buildings and limited land. This research aims to analyze the effectiveness of natural lighting, especially the natural lighting factor (daylight factor), in the classrooms of SMA N-1 Tanjung Pura in accordance with the SNI standard SNI 03-6197-2020, which sets a lighting level of 350 Lux. The research method uses computer simulation with Dialux Evo 11.1 software. The research results show that some classrooms do not meet the standards because they have lighting levels that are lower or higher than those specified in the standards.
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Rabner, A., E. Martinez, R. Pedhazur, T. Elad, S. Belkin, and Y. Shacham. "Mathematical Modeling of a Bioluminescent E. Coli Based Biosensor." Nonlinear Analysis: Modelling and Control 14, no. 4 (2009): 505–29. http://dx.doi.org/10.15388/na.2009.14.4.14471.
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In this work we present a mathematical model for the bioreporter activity of an E. coli based bioluminescent bioreporter. This bioreporter is based on a genetically modified E. coli which harbors the recA promoter, a member of the bacterial SOS response, fused to the bacterial luminescence (lux) genes. This bioreporter responds to the presence of DNA damaging agents such as heavy metals, H2O2 and Nalidixic Acid (NA) that activate the SOS response. In our mathematical model we implemented basic physiological mechanisms such as: the penetration of the NA into the biosensor; gyrase enzyme inhibition by the NA; gyrase level regulation; creation of chromosomal DNA damage; DNA repair and release of ssDNA into the cytoplasm; SOS induction and chromosomal DNA repair; activation of lux genes by the fused recA promoter carried on a plasmidal DNA; transcription and translation of the luminescence responsible enzymes; luminescence cycle; energy molecules level regulation and the regulation of the O2 consumption.
 The mathematical model was defined using a set of ordinary differential equations (ODE) and solved numerically. We simulated the system for different concentrations of NA in water for specific biosensors concentration, and under limited O2 conditions. The simulated results were compared to experimental data and satisfactory matching was obtained. This manuscript presents a proof of concept showing that real biosensors can be modeled and simulated. This sets the ground to the next stage of implementing a comprehensive physiological model using experimentally extracted parameters. Following the completion of the next stage, it will be possible to construct a “Computer Aided Design” tool for the simulation of the genetically engineered biosensors. We define a term “bioCAD” for a Biological System Computer Aided Design. The specific bioCAD that is described here is aimed towards whole cell biosensors which are under investigation today for functional sensing. Usage of the bioCAD will improve the biosensors design process and boost their performance. It will also reduce Non Recurring Engineering (NRE) cost and time. Finally, using a parameterized solution will allow fair and quick evaluation of whole cell biosensors for various applications.
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Shabaev, Evgeniy A., and Mikhail M. Romanovets. "Computer Simulation of a Digital System of Automatic Lighting Control." Engineering Technologies and Systems 34, no. 2 (2024): 295–317. http://dx.doi.org/10.15507/2658-4123.034.202402.295-317.
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Introduction. In the poultry industry, the use of local LED lighting systems with changeable light and correlated color temperature of the luminaire optical radiation during the photoperiod is promising. To maintain light intensity accurately at a specified level, the use of an automatic control system (ACS) of lighting is required. Aim of the Study. The study at aimed at determining the parameters for the PI controller of the digital ACS of lighting in all-age cages, providing the required quality indicators of the regulatory process. Materials and Methods. For the study there were used the elements of mathematical statistics, experimental research design theory, correlation and regression analysis, automatic control theory and computer simulation. Real experiments were carried out on a laboratory sample of a digital dynamic local lighting system. Computer simulation was performed in the SimInTech program. Results. A computer model for a digital ACS of lighting has been developed. The tunings of the PI controller were calculated using the CHR, VTI, and Kopelovich methods. A comparative estimation of the control process quality was carried out using graphs of transient processes obtained by computer simulation. The reliability of the results of computer simulation of ACS lighting has been confirmed experimentally. Discussion and Conclusion. High regulator performance indicators for the digital ACS of lighting were ensured by a PI controller with kP = 14.027∙10−3 and TI = 145.72 ms calculated using the Kopelovitch method. A comparative assessment of transient processes in a real ACS and in a computer model of this system allows concluding that the developed model is highly accurate and the choice of simulation parameters in the SimInTech program is correct. It has been experimentally established that the required quality of the control process of ACS is ensured for a wide range of specified lighting: from 1 to 25 lux.
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Rahmi, Putriaz. "Tranformation and Needs Room Layout Design that Determine the Footwear Industry Function in Residential Jakarta." ARTEKS : Jurnal Teknik Arsitektur 1, no. 1 (2016): 49–68. http://dx.doi.org/10.30822/arteks.v1i1.25.
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The purpose of this reserach is to provide design ideas of shoes home industry by designing the layout that can acommodate the transformation and space needed working & living area. The research’s method based on the phenomenon in the shoes home industry starting from surveying the object which is Perkampungan Industri Kecil (PIK) Penggilingan and understanding the fundamentals points of shoes home industry in terms of transformation, space requirements, and natural lighting & ventilation. The pattern of object’s transformation used for determine the organization of space that can be considered for designing the layout. Space requirement analyzed according to the standard of space. Lighting & natural ventilation analyzed with ecotect simulation according to the standard of health’s minister. The research concluded that the pattern of transformation on the object by level of transformation should be done by extension. In spatial transformation, the design should adapt to makes change of space requirement, especially for the expansion of flexible and residential area. In configurational transformation, service area should be considered in layout design because its fixed position. Some of residential area can be combined with production area in the very small home industry. In the small home industry, some of space can be multifunctional, but there should have a separation between residential and production area. Space on the object needs some adjustments based on standard of space requirements. Some of space can be multifunctional and used portable furniture depends on activity and time-used. Working maps of production area should be arrange using spatial patterns based on the flow of production process. Natural lighting and ventilation should be adjusted to the lighting standard (1000 lux for upper area, 300 lux for bottom area) and thermal comfort (21-30°C).
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Rahmi, Putriaz. "TRANSFORMASI DAN KEBUTUHAN RUANG YANG MENENTUKAN DESAIN LAYOUT PADA FUNGSI INDUSTRI SEPATU DALAM HUNIAN DKI JAKARTA." ARTEKS, Jurnal Teknik Arsitektur 1, no. 1 (2016): 49. http://dx.doi.org/10.30822/artk.v1i1.82.
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Title: Tranformation and Needs Room Layout Design that Determine the Footwear Industry Function in Residential JakartaThe purpose of this reserach is to provide design ideas of shoes home industry by designing the layout that can acommodate the transformation and space needed working & living area. The research’s method based on the phenomenon in the shoes home industry starting from surveying the object which is Perkampungan Industri Kecil (PIK) Penggilingan and understanding the fundamentals points of shoes home industry in terms of transformation, space requirements, and natural lighting & ventilation. The pattern of object’s transformation used for determine the organization of space that can be considered for designing the layout. Space requirement analyzed according to the standard of space. Lighting & natural ventilation analyzed with ecotect simulation according to the standard of health’s minister. The research concluded that the pattern of transformation on the object by level of transformation should be done by extension. In spatial transformation, the design should adapt to makes change of space requirement, especially for the expansion of flexible and residential area. In configurational transformation, service area should be considered in layout design because its fixed position. Some of residential area can be combined with production area in the very small home industry. In the small home industry, some of space can be multifunctional, but there should have a separation between residential and production area. Space on the object needs some adjustments based on standard of space requirements. Some of space can be multifunctional and used portable furniture depends on activity and time-used. Working maps of production area should be arrange using spatial patterns based on the flow of production process. Natural lighting and ventilation should be adjusted to the lighting standard (1000 lux for upper area, 300 lux for bottom area) and thermal comfort (21-30°C).Keywords: Shoes home industry, transformation, space requirement.
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Nurlis, Aulia Ghifari, Damar Rastri Adhika, Ahmad Nuruddin, Yulian Aska, and Arfat Pradana. "Fabrication and Characterization of Nano-Structured ZnS:Cu LED." Journal of Metastable and Nanocrystalline Materials 38 (January 15, 2024): 43–50. http://dx.doi.org/10.4028/p-oyfoh4.
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A wide range of Light Emitting Diodes (LEDs) applications, from general lighting to transmission sources of the Visual Light Communication (VLC) system, makes the LEDs very important to be developed. This research focuses on comparing LED performance due to the variation in surface size and shape of the LED. The research method is carried out with a simulation and an experimental approach. Before the experiment, the LED was simulated with nanopattern variations to determine the best fabrication parameter. The simulation method is carried out using Ansys Lumerical FDTD 2021. The experiment method used to fabricate nanopatterns on the surface of a semiconductor LED layer uses the nanoimprint lithography method. Stamps for nanoimprint lithography are made using Polydimethylsiloxane (PDMS), and the nanopattern sources are obtained from DVD and Blu-ray grating patterns. The characterization of nanoscale patterns was carried out using a Scanning Electron Microscope (SEM). The light emission intensity is measured using a lux meter at a series of emission angles. The results obtained from this research are that the smaller the width and the periodicity of the grating nanopattern, the light produced will be distributed at a wider angle, but the light intensity will decrease; conversely, for a planar surface without a grating nanopattern, level of focus and intensity of light will be higher. In addition, the thicker the ZnS:Cu layer, the better the intensity of the light produced.
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Setyaningsih, Endah, Yohanes Calvinus, Joni Fat, and Fransisca Iriani Roesmaladewi. "INTERVENSI ILUMINANSI DAN OTOMATISASI ON/OFF LAMPU RUANG KELAS UNTUK MENCAPAI KENYAMANAN VISUAL DAN HEMAT ENERGI." Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan 6, no. 2 (2022): 263–70. http://dx.doi.org/10.24912/jmstkik.v6i2.22721.
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the quality of room lighting are the level of lighting/illuminance, light color, and glare. The classroom as a place for learning and teaching requires quality lighting. This study uses a classroom for case studies, namely at Perti Tomang Islamic Vocational School, West Jakarta, but is limited in terms of illuminance. Based on measurements, the illuminance of this classroom does not meet SNI room lighting standards. For this reason, illumination interventions are needed in the classroom, in the form of increased lighting. Improved lighting has an impact on increasing the use of electric power, for this reason efforts are needed to save energy. The problem is how to increase lighting and save energy at the same time. The purpose of this study was to determine the number of classroom lamps so that they achieve illuminance according to SNI, but still achieve energy saving. The research method is to make a classroom model with lighting that meets SNI and there are automation on/off room lights. The step is in the form of a simulation using dialux software, so that the number of lights that must be added can be known. The method for saving energy is by installing an on/off automation system for classroom lights. The results obtained from this study are an increase in average illuminance from 213.8 lux to 350 lux and is in accordance with SNI, so that visual comfort can be achieved. The on/off automation intervention was carried out by installing 3 motion sensors with the Doppler effect microwave sensor type in the classroom. The lights will turn on if there is movement of students or teachers entering the room, and the lights will turn off if there are no students or teachers. Thus, the lamp is not continuously lit for 10 hours. Based on this intervention, 14,004 KWH of electrical energy can be saved for 1 (one) month. Keywords: intervention; illuminance; light on/off automation; visual comfort; energy saving Abstrak Kenyamanan visual adalah rasa nyaman dari indra penglihatan seseorang terhadap pencahayaan ruangan yang berkualitas. Parameter yang menentukan pencahayaan ruang berkualitas yaitu tingkat pencahayaan/iluminansi, warna cahaya, dan kesilauan. Ruang kelas sebagai tempat belajar, memerlukan pencahayaan yang berkualitas. Penelitian ini menggunakan ruang kelas untuk studi kasus, yaitu di SMK Islam Perti Tomang Jakarta Barat, namun dibatasi tentang iluminansi. Berdasarkan hasil pengukuran, iluminansi rata-rata ruangan kelas ini, belum memenuhi standar pencahayaan ruang sesuai SNI. Untuk itu diperlukan intervensi iluminansi pada ruang kelas, berupa peningkatan pencahayaan. Peningkatan pencahayaan berdampak pada peningkatan penggunaan daya listrik, untuk itu diperlukan usaha penghematan energi. Permasalahannya adalah bagaimana melakukan peningkatan pencahayaan dan sekaligus hemat energi. Tujuan penelitian ini adalah menentukan jumlah lampu ruang kelas sehingga mencapai iluminansi sesuai SNI, namun hemat energi. Metoda penelitian adalah membuat model ruang kelas dengan pencahayaan yang memenuhi SNI dan ada otomatisasi on/off lampu ruang. Langkahnya berupa simulasi dengan menggunakan software dialux, sehingga dapat diketahui jumlah lampu yang harus ditambahkan. Metode untuk penghematan energi berupa pemasangan sistem otomatisasi on/off lampu ruang kelas. Hasil penelitian adalah adanya peningkatan iluminansi rata-rata dari 213,8 lux menjadi 350 lux yang telah sesuai SNI, sehingga kenyamanan visual dapat tercapai. Intervensi otomatisasi on/off, dilakukan dengan pemasangan berupa 3 sensor gerak dengan tipe sensor gelombang mikro efek Doppler pada ruangaan kelas. Lampu akan menyala jika ada gerakan siswa atau guru yang memasuki ruangan, dan lampu akan mati jika tidak ada siswa atau guru. Jadi lampu tidak terus menerus menyala selama 10 jam. Adanya intervensi ini, terjadi penghematan energi listrik sebesar 14,004 KWH selama 1 (satu) bulan.
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Bai, Jinzhou, Yonglin Bai, Xun Hou, et al. "The analysis of electron scattering among multiplying layer in EBAPS using optimized Monte Carlo method." Modern Physics Letters B 34, no. 34 (2020): 2050398. http://dx.doi.org/10.1142/s0217984920503984.
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Electron bombarded Active Pixel Sensor (EBAPS) is well known for its low noise in low-light level imaging, high mechanical integration, and a relatively low cost. It plays an important role in areas of the industrial process as well as the fundamental scientific research. However, the performance of EBAPS is intensively influenced by the structural parameters (i.e. the acceleration voltage between cathode and anode, thickness of the passivation layer, etc.). Due to the influence of these factors mentioned above, the performance of EBAPS is restricted to achieve its best condition. Herein, a model based on the optimized Monte Carlo method was proposed for effectively analyzing the scattering behavior of electrons within the electron multiplier layer. Unlike traditional simulation, which only deals with the electron scattering in longitudinal, in this paper, we simulate the electron scattering character not only in horizontal but also vertical among the multiplier layer, which would react to the influence induced by structural parameters more complete and more precise. Based on the proposed model, an experimental prototype of EBAPS is built and its detection sensitivity achieves [Formula: see text] lux under spectral response of ultraviolet (UV) spectroscopy, which improved a lot from our former design. The proposed model can be used for analyzing the influence induced by structural parameters, which exhibit enormous potential for exploring the high-gain EBAPS.
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Gbologah, Franklin E., Angshuman Guin, Roger Purcell, and Michael O. Rodgers. "Benefit-to-Cost Analysis Framework for Intersection Illumination: A Case Study of Rural Conventional Intersections in Georgia." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 9 (2019): 83–93. http://dx.doi.org/10.1177/0361198119843262.
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Lighting provides one of the most effective night-time intersection safety countermeasures. However, lighting is also one of the main contributors to intersection maintenance and operation costs. For a public transportation agency with jurisdiction over many intersections, the system-wide lighting costs can significantly deplete already limited funds for other important maintenance projects. A sound framework for conducting benefit-to-cost trade-off analysis would be beneficial to transportation agencies. Unfortunately, published works on the benefit-to-cost analysis are few and mostly dated. This paper outlines a detailed framework for conducting benefit-to-cost analysis for rural intersection lighting. The framework uses intersection lighting simulation models to generate annualized operating and maintenance cost data for different lighting levels. The intersection lighting models were developed with DIALux® professional lighting software. This study used the framework to conduct a case study of rural conventional three-leg and four-leg intersections with at least an annual average daily traffic (AADT) of 500 from Georgia. Based on the available Georgia case study data, this paper finds that for rural intersection locations that require no electrification, basically any illumination level, including those less than the recommended minimum of 8 lux, is likely to be cost-effective for any entering AADT. However, locations that require electrification need to be evaluated based on the overall costs, entering AADT, existing crash rate, and a target benefit-to-cost ratio that signifies the level of cost-effectiveness required by the state Department of Transport (DOT). Consequently, a companion spreadsheet benefit-to-cost model has been developed to facilitate the cost-effectiveness analysis at any rural uncontrolled or stop-controlled intersection.
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Ruiz, Alejandro, Miguel Ángel Campano, Ignacio Acosta, and Óscar Luque. "Partial Daylight Autonomy (DAp): A New Lighting Dynamic Metric to Optimize the Design of Windows for Seasonal Use Spaces." Applied Sciences 11, no. 17 (2021): 8228. http://dx.doi.org/10.3390/app11178228.
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Nowadays, daylight dynamic metrics are the most useful indicators to quantify the use of natural light, with daylight autonomy (DA) being one of the most widespread among all of them. This metric represents the percentage of the occupied time throughout the year in an indoor space when daylight reaches the minimum illuminance level to develop a specific task. Accordingly, the higher the percentage of DA, the shorter the switching on time of electric lighting. However, this metric considers for its calculations all business days of a whole standard year, and is thus not an accurate indicator for seasonal use spaces such as school classrooms. In this context, a variant of this metric is proposed, namely partial daylight autonomy (DAp), which is a non-lineal derivation of DA that considers those seasonal use spaces, helping to define the real percentage of indoor daylight use in order to properly quantify the accurate switching on time of electric lighting and therefore its energy consumption. As deduced from the analysis, the more precise results provided by DAp reach divergences close to 10% in comparison with the original conception of DA. Thus, this metric serves to estimate more accurately the impact on energy consumption if an electric lighting control system is implemented through lux meters. This new proposal has been monitored under real sky conditions in a test cell, providing converging results with those observed in the simulation process.
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Dovlatov, Igor M., Leonid Y. Yuferev, Dmitriy Y. Pavkin, Vladimir A. Panchenko, Vadim E. Bolshev, and Igor V. Yudaev. "Rationale for Parameters of Energy-Saving Illumination inside Agricultural Premises and Method of Its Values Calculation." Energies 16, no. 4 (2023): 1837. http://dx.doi.org/10.3390/en16041837.
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High-quality lighting of premises in the cultivation of farm animals is an important condition for the successful development of the agro-industrial complex. Sufficient lighting with the simulation of sunrise and sunset which increases daylight hours to 15–16 h can raise the level of production by 8–15%. The most innovative, economical and efficient light source for livestock, poultry and greenhouse buildings are LED lamps allowing for a short payback period. The difference between the models developed by the authors and the traditional point method is taking into account lamp length o, lamp suspension height, location of the illuminated area under the lamp at displacement and observation angles, and luminous flux of light source, and the most important thing is body angle of the light source. This paper presents the method for calculating illumination under the LED lamp due to the large error in the values obtained by theoretical methods due to the lack of a correction factor for changing the illumination of the lamp (0.8). Prediction of crystal heating was carried out by verification calculation in the ANSYS/CFX software package. Forecasting the illumination of the fodder table was carried out by calculation in the DIALux evo software package. The main parameters of an energy-saving LED lamp (power consumption, luminous flux, color temperature and color) were selected. The consumption of electrical energy decreased by 85%; the average level of illumination increased and amounted to 123.1 lux. The developed method for calculating the illumination under the LED lamp can be considered satisfactory, the Student and Fisher criteria do not exceed tabular values and the correlation coefficient showed a close relationship. To comply with electrical safety standards in the premises, a resonant power supply system for LED lamps is offered.
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Ghina Soraya, Popi Puspitasari, and Khotijah Lahji. "NATURAL LIGHT INTENSITY AND VISUAL COMFORT THROUGH ADJUSTING THE HEIGHT OF THE CURTAIN OPENING." International Journal on Livable Space 7, no. 2 (2023): 64–70. http://dx.doi.org/10.25105/livas.v7i2.16725.
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The type of activity, room area, and light intensity influence the visual comfort level of room users. In educational buildings, visual comfort influences the level of performance during the teaching and learning process of students. Students of the Bachelor of Architecture Study Program, FTSP, Trisakti University, use the Studio on the 6th floor (C.608-609) with 85% curtained glass window walls on the North and West, and 10% uncurtained bouvenlight windows on the South. It is estimated that the availability of natural light sources with such capacity is sufficient for the Studio learning process, but in fact users still turn on artificial lighting when working during the day. The hope is that by using curtained windows, students can regulate natural lighting needs to reduce the use of artificial lighting. Until this research was conducted, it was not known how high curtains met visual comfort standards. This research aims to create contour simulation of room’s natural light intensity C.608-609 using dialux kw06-288 software, in relation to adjust of curtains on windows with heights of 30 cm, 60 cm, 90 cm and 120 cm, and their impact on the user's feelings of visual comfort or discomfort. The results show that the distribution of natural light entering the room is not even and varied. According to SNI 03-6575-2001, the light intensity for a studio is 500-750 lux, but the measurement results show that at a curtain opening height of 120 cm, the light reach to the room with the furthest depth of 16.8m is not reached, so to achieve visual comfort the assistance of artificial lighting is needed, especially in the east-south of studio. Meanwhile, the area around the light source causes glare. Keywords: Light Intensity, Visual Comfort, Curtain Opening Height
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Yeh, Chia Hung, Liang Gie Huang, and Man Yee Chan. "Optimal Lighting of Optical Devices for Oral Cavity." International Journal of Optics 2020 (January 30, 2020): 1–13. http://dx.doi.org/10.1155/2020/1370917.
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Oral surgery mainly provides surgical scope illumination by doctors wearing headlamps, but there are still clinical restrictions on use. The limitations are (1) due to the angle of the head swing and the shadow of the visual field during the operation and (2) due to projection of the light source being worn on the doctor’s head and the length of the wire, and the fiber-optic wire will affect the relative position of the surgical instrument and limit the scope of the doctor’s activity. This study will focus on the development of oral lighting optical microstructure devices to solve and improve the abovementioned clinical use limitations. The production method is to make an oral lighting mold by 3D printing technology and use the polydimethylsiloxane (PDMS) of liquid silicone material to make an oral lighting device with mold casting technology. The results show that the optical simulation achieves the target light distribution by optimizing the three geometric reflection surfaces combined with the lens design by the optimization method, and the maximum illumination value can reach 5102 lux. According to the measurement results of mold casting technology, the average errors of the profile of the 3D printing finished product and the PDMS finished product of the oral device structure are about 1.4% and 16.9%, respectively. Because the contour of the PDMS finished product’s error caused the light to shift by 0.5∼3 mm distance, the light is still concentrated in the range of the tonsils, so this study can be defined as within the acceptable range of within 16.9% of the intra lighting error. The development of oral lighting devices in this study will reduce the burden on physicians in nonprofessional fields, reduce the time of surgery for patients to maintain the health of doctors, and rise the level of medical equipment to increase surgical safety.
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Wen, Longbo, Hong Liu, Zhao Chen, et al. "Effect of mount location on the quantification of light intensity in myopia study." BMJ Open Ophthalmology 8, no. 1 (2023): e001409. http://dx.doi.org/10.1136/bmjophth-2023-001409.
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PurposeTo investigate how the mounting location of wearable devices affects the measurement of light intensity.MethodsTwo commercially available wearable devices, HOBO and Clouclip, were used to compare the effects of different mount locations on light intensity measurement. We assessed the consistency of the measurements of the two devices by placing a HOBO and a Clouclip simultaneously in 26 different light environments and measuring the light intensity. To simulate the real-life usage scenarios of the two devices, we had 29 participants wear two HOBOs—one on the wrist and the other on the chest—along with a Clouclip on their spectacles for 1 day; meanwhile, the light intensity was measured and analysed.ResultsWhen under the same light environments, the light intensity measured by the Clouclip was 1.09 times higher than that by the HOBO, with an additional 82.62 units (r2=1.00, p<0.001). When simulating the real-life scenarios, the mean light intensity at the eye-level position was significantly lower than that at the chest position (189.13±665.78 lux vs 490.75±1684.29 lux, p<0.001) and the wrist position (189.13±665.78 lux vs 483.87±1605.50 lux, p<0.001). However, there was no significant difference in light intensity between the wrist and chest positions (483.87±1605.50 lux vs 490.75±1684.29 lux, p=1.00). Using a threshold of 1000 lux for outdoor exposure, the estimated light exposure at the eye-level position was significantly lower than that at the chest position (3.9% vs 7.8%, χ2=266.14, p<0.001) and the wrist position (3.9% vs 7.7%, χ2=254.25, p<0.001).ConclusionsOur findings revealed significant variations in light exposure among the wrist, chest and eye position. Therefore, caution must be exercised when comparing results obtained from different wearable devices.
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Rachman, H. H., R. Hendarti, and B. Sakina. "Natural lighting optimization through configuration of shading device for library in East Jakarta." IOP Conference Series: Earth and Environmental Science 1169, no. 1 (2023): 012071. http://dx.doi.org/10.1088/1755-1315/1169/1/012071.
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Abstract Visual comfort is an important thing to consider in designing a library. The quality of lighting in reading rooms in public libraries in Jakarta is still below the SNI lighting standard of 300 lux. This study will discuss about optimizing and utilizing natural lighting for the reading room by using a combination of several types of shading devices. The method used is performing simulations and comparisons. A total of 138 types of shading devices were simulated with the VELUX Daylight Visualizer software and compared to find the best results. The results of the comparative analysis show that the GH1-19 shading device provides the most optimal results with an average illumination level of 548 lux and a uniformity ratio of 0.81 simulated in different seasons, times, and orientations.
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Natalia, S., and G. Suharjanto. "The Openings and Lighting Design Strategies of Primary School in Jakarta." IOP Conference Series: Earth and Environmental Science 998, no. 1 (2022): 012036. http://dx.doi.org/10.1088/1755-1315/998/1/012036.
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Abstract The level of illumination in a room is very important to support the activities that are being carried out in the room. The width of the openings and the side lighting design strategy are things that need to be analyzed to maximize the natural lighting that enters the room without dazzling the eyes, especially in the classroom. This study aims to determine the width of the opening and the side lighting design strategy of an elementary school in Jakarta that can maximize natural lighting without dazzling the eyes based on the level of illumination so that visual comfort standards can be achieved. The method used is to build a building using FormIt software to determine which side of the building gets sun exposure and makes several simulations of the area of openings and several simulations of side lighting design strategies using the Velux Daylight Visualizer 3 software to determine the level of lighting in the room according to the standard lux requirements for educational institutions. From the research results, it can be seen that the width of the opening and the side lighting design strategy of a room affects the level of natural lighting obtained.
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Garcia-Prada, Clara Diaz, Lena Carmes, Ali Parach, et al. "Abstract P009: Gadolinium-based nanoparticles sensitize ovarian peritoneal carcinomatosis to targeted radionuclide therapy." Clinical Cancer Research 31, no. 2_Supplement (2025): P009. https://doi.org/10.1158/1557-3265.targetedtherap-p009.
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Abstract In 2024, around 13,000 women are expected to die from Ovarian Cancer (OC) in the US. Masked disease progression leads to late-stage diagnosis after the disease has spread to the peritoneal cavity (peritoneal carcinomatosis, PC). Treatments do not show substantial curative benefits, as disease will reoccur in 70-90% of patients. Targeted Radionuclide Therapy (TRT) specifically irradiates tumors sparing the surrounding healthy tissues, offering an attractive therapeutic option for metastatic spread. Here, we investigated the radiosensitizing effects of Gadolinium-based nanoparticles (Gd-NPs) combined with [177Lu]Lu-DOTA-trastuzumab. [177Lu]Lu-DOTA-trastuzumab injected activity (IA) combined or not with Gd-NPs was investigated in athymic female mice bearing intraperitoneal (IP) SKOV3 HER2+ tumor xenografts. The therapeutic efficacy and toxicity of 5 MBq [177Lu]Lu-DOTA-trastuzumab with Gd-NPs administered in different fractionated regimens were evaluated. NaCl, trastuzumab plus Gd-NPs and [177Lu]Lu-DOTA-trastuzumab were used as controls. Biodistribution and dosimetry were determined, and Monte Carlo simulation of energy deposits was performed. Gd-NPs’ subcellular localization and uptake, cytotoxic effects of the combination and underlying radiosensitization mechanisms were investigated in 3 OC cell lines (SKOV3, OVCAR3, A431). Optimal therapeutic response was obtained with 2 injections of 5 mg Gd-NPs at 24 and 72 h after injection of [177Lu]Lu-DOTA-trastuzumab. The combination delayed tumor growth and significantly increased mice's median survival compared to all controls. SPECT/CT imaging on recovered tumor nodules highlighted specific targeting of both compounds after IP injection. In vitro experiments support the preclinical data, showing increased cytotoxicity of the drug combination. Fluorescence and Transmission Electron Microscopy (TEM) imaging showed co-localization of the NPs with the lysosomal compartment. Combination with Gd-NPs increased Reactive Oxygen Species (ROS) production and lipid peroxidation, suggesting a potential role of ferroptosis in the NPs-mediated toxicity. Fewer lysosomes were observed associated with cytoplasmic pH decrease, suggesting lysosomal disruption. Cytoplasmic vacuolization, mitochondrial depolarization, apoptosis, and micronuclei formation were noted and reversed by iron chelation. Dosimetry calculations revealed that exposure of Gd-NPs to 177Lu increased the Auger electron yield, but not the absorbed dose. We provide strong evidence in vivo of Gd-NPs radiosensitizing effect when combined, for the first time, with a radiolabeled antibody. At a cellular level, we report a high dependence on iron-derived hydroxyl radical production, leading to a lysosomal–mediated cell disruption. The radiosensitization effect allows reduction of the IA in mice, keeping a high therapeutic efficacy while decreasing treatment-related toxicities. As Gd-NPs are already combined with EBRT in clinical trials, the present study opens perspectives to optimize and translate this theranostic strategy for the treatment of OC-derived PC. Citation Format: Clara Diaz Garcia-Prada, Lena Carmes, Ali Parach, Alejandro Bertolet, Sophie Poty, Jan Schuemann, Olivier Tillement, François Lux, Julie Constanzo, Jean-Pierre Pouget.Gadolinium-based nanoparticles sensitize ovarian peritoneal carcinomatosis to targeted radionuclide therapy.[abstract]. In: Proceedings of the AACR Special Conference in Cancer Research: Translating Targeted Therapies in Combination with Radiotherapy; 2025 Jan 26-29; San Diego, CA. Philadelphia (PA): AACR; Clin Cancer Res 2025;31(2_Suppl):Abstract nr P009
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Alonso-Montesinos, Joaquín, Rafael Monterreal, Jesus Fernandez-Reche, et al. "Nowcasting System Based on Sky Camera Images to Predict the Solar Flux on the Receiver of a Concentrated Solar Plant." Remote Sensing 14, no. 7 (2022): 1602. http://dx.doi.org/10.3390/rs14071602.
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As part of the research for techniques to control the final energy reaching the receivers of central solar power plants, this work combines two contrasting methods in a novel way as a first step towards integrating such systems in solar plants. To determine the effective power reaching the receiver, the direct normal irradiance was predicted at ground level using a total sky camera, TSI-880 model. Subsequently, these DNI values were used as the inputs for a heliostat model (Fiat-Lux) to trace the sunlight’s path according to the mirror features. The predicted valuex of flux, obtained from these simulations, differ of less than 20% from the real values. This represents a significant advance in integrating different technologies to quantify the losses produced in the path from the heliostats to the central receiver, which are normally caused by the presence of atmospheric attenuation factors.
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Matusiak, Barbara Szybinska, Filomena Russo, Mandana Sarey Khanie, et al. "Methods for Quality Assessment of Window View." Land 13, no. 12 (2024): 2090. https://doi.org/10.3390/land13122090.
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This paper summarises findings from two workshops evaluating a series of views in various settings by an interdisciplinary group of experts. In the first one (Trondheim, June 2022), ten experts visited and assessed views from nine rooms. In the second one (Lausanne, June 2023), eleven experts assessed window views from four spaces. The workshops’ main objective was to develop and test multi-method assessments of window views. During both workshops, participants completed a survey that included close and open-ended questions about the perceived quality of the room and the view. Participants also measured lux level, took photographs, made hand drawings of the view, and answered a questionnaire about their mood and the environmental conditions in the room. After the workshop, point-in-time daylight simulations were performed for the visited rooms. The paper describes, compares, and recommends the use of the aforementioned methods depending on the type and complexity of the view, and the space, the evaluators’ professional background, and the type of collected data. It also discusses the overlap of the methods and estimates the preparation time, time spent on site, and the amount of work after the visit. Finally, it recommends the use of the tested methods depending on the application.
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Busono, Suryo, and Edi Hilmawan. "PEMANFAATAN REMOTE SOURCE SOLAR LIGHTING (RSSL) UNTUK PENGHEMATAN ENERGI DI GEDUNG KOMERSIAL." Jurnal Energi dan Lingkungan (Enerlink) 11, no. 2 (2015). http://dx.doi.org/10.29122/elk.v11i2.1581.
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Remote Source Solar Lighting (RSSL) is an innovation in lighting technology in the building to transfernatural light into areas which are not covered by conventional natural lighting techniques. In this study,RSSL applications in an Office Building in the Puspiptek Area Tangsel has been examined.Measurement and simulation are used evaluate the effectiveness of the use of RSSL in illuminatingareas that do not have access to outside light. Advanced simulation was conducted to compare theuse of artificial light to produce the same illumination level. The measurement results show that theSolar Light Collector combined with Light Tube is able to transfer light from the outside into the roomwith a level of efficiency of 39.48%. Utilization of light focusing module can improve the efficiency oflight distribution with an efficiency of up to 56.1%.The simulation results show that RSSL with light tubediameter of 35 cm, capable of illuminating an area that does not have access to the outside withillumination level up to 219 Lux at the zenith ilumination of 89000 Lux. However, RSSL is no longereffective when the zenith illumination down to 26000 Lux. Comparison between CFL bulbs with RSSL,with the same lighting point, when the zenith illumination levelis average or higher, RSSL providelighting levels on par with CFL bulbs, but still lower than the LED lights. When the zenith illumination islow / minimal then 14 points RSSL only able to provide lighting equivalent to 8 points CFL.Key Words: Energy conservation in commercial building, smart building, natural lighting, RemoteSource Solar Lighting
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Saddami, Khairun, Yudha Nurdin, Fina Noviantika, Maulisa Oktiana, and Sayed Muchallil. "Water Level Detection for Flood Disaster Management Based on Real-time Color Object Detection." Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control, March 17, 2023. http://dx.doi.org/10.22219/kinetik.v8i1.1635.
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Currently, the water level monitoring system for a river uses instruments installed on the banks of the river and must be checked continuously and manually. This study proposes a real-time water level detection system based on a computer vision algorithm. In the proposed system, we use color object tracking technique with a bar indicator as a reference’s level. We set three bar indicators to determine the status of the water level, namely NORMAL, ALERT and DANGER. A camera was installed across the bar level indicators to capture bar indicator and monitoring the water level. In the simulation, the monitoring system was installed in 5-100 lux lighting conditions. For experimental purposes, we set various distances of the camera, which is set of 40-80 centimeters and the camera angle is set of 30-60 degrees. The experiment results showed that this system has an accuracy of 94% at camera distance is in range 50-80 centimeters and camera angle is 60o. Based on these results, it can be concluded that this proposed system can determine the water level well in varying lighting conditions.
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Burke, M., A. Rajan, D. Perschbacher, D. Mahajan, and K. Herrmann. "Does optimized daytime/nighttime programming reduce insertable cardiac monitor event burden?" Europace 25, Supplement_1 (2023). http://dx.doi.org/10.1093/europace/euad122.249.
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Abstract Funding Acknowledgements Type of funding sources: Private company. Main funding source(s): Boston Scientific. Background Insertable Cardiac Monitors (ICM) are widely used for long term cardiac arrhythmia monitoring and diagnosis. ICMs can generate episodes (and associated alerts) that are non-actionable from a clinical standpoint leading to alert fatigue. In particular, non-actionable bradycardia and pause events may occur at nighttime due to reduced sympathetic tone during sleep. We have used stored auto-detected events to better understand optimal programming with nighttime settings to eliminate potentially clinically non-actionable episodes and improve clinic workflow. Objective Evaluate the reduction in clinic episode review burden in bradycardia (brady) and pause episodes with a new daytime/nighttime programming optimization in LUX-Dx ICM. Methods We analyzed data from 2,555 patients implanted with LUX-Dx ICM that included 132,928 detected brady and pause episodes stored remotely. We evaluated optimized settings with separately programmed nocturnal (11p-7a) and nominal daytime (7a-11p) rates and durations as compared to full-time nominal settings (24-hour nominal). Optimized nocturnal programming was set to trigger event storage on a heart rate setting of ≤30 bpm as well as a duration setting of ≥5s for nocturnal brady and pause episodes. The nominal day time and 24-hour settings for brady and pause episodes were HR ≤40bpm and duration ≥3s. The episode burden was analyzed retrospectively using stored episodes comparing optimized versus full-time nominal programming. Results A simulation using the optimized settings showed that 98% and 90% of the nocturnal bradycardia (n = 1909) and pause episodes (n = 1198) had a HR &gt;30bpm, and duration &lt;5s respectively. As a result, the optimized settings for nocturnal episodes reduced 75% and 56% of bradycardia and pause episodes, respectively. (See Figure 1). At a patient level, 63% and 25% of patients had a substantial reduction (&gt;=50%) in brady and pause episodes, respectively. Conclusion The optimized programming settings, which simply adjusts for nocturnal physiology, may substantially improve clinical workflow by reducing potentially clinically non-actionable episodes and associated alerts detected by the LUX-Dx ICM. More clinical correlative studies are needed to understand patient risk.
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MOHAMMED SA’AD YELWA and MURTALA MUHAMMED SALIHU. "EXPLORING THE IMPACT OF DAYLIGHT STRATEGIES: A CASE STUDY OF YANKARI MUSEUM, BAUCHI-NIGERIA." Journal of Environmental Management and Construction Research, March 31, 2025. https://doi.org/10.70382/bejemcr.v7i4.007.
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The primary function of museum is preservation and display of museum collections for educational, entertainment and research purposes. However, these could only be achieved through careful use of daylight for preservation and display of the artifacts which will reduce use of artificial lighting and energy consumption in the gallery. Therefore, it is very important to integrate passive techniques and their application in contemporary design and construction of museum galleries. Daylight strategies is specifically known for providing natural and diffused methods of attaining visual light level into the buildings. the study is based on data obtained through computer aided daylight simulation by Design Builder version (6.1.0.006) software using radiance for calculations and real weather data for Bauchi Yankari. A physical observation and survey on the artifacts were conducted as sensitive artifacts may be subjected to damage cause by light exposure. Various condition and state of artifacts in relation to intensity of daylight fenestration into the gallery and on the surface of the artifacts using Benetech digital lux metre GM1020 version in Yankari museum were studied.
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Mohd Husini, Elina, Fadli Arabi, Liyana Shamri, Azhani Abdul Manaf, Madihah Mat Idris, and Juliza Jamaludin. "RESILLIENT LIVING BY OPTIMIZING THE BUILDING FAÇADE IN DESIGNING POST-COVID HOUSING." PLANNING MALAYSIA 20 (July 26, 2022). http://dx.doi.org/10.21837/pm.v20i21.1094.
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The living performance in sustainable development outline contributing factors towards efficiency, such as ecological, economic, health, and social integration. The performance of facade design must be emphasised to describe resilient living and access to mitigate the design of post-coronavirus disease (COVID-19) housing. The spread of the pandemic underlines the importance of providing quality of life and wellbeing in the building environment, hence highlighting a crucial need to improve indoor air quality and passive building performance to minimise the transmission of COVID-19 and indoor airborne diseases as a result of poor ventilation. The passive building performance and facade complement the energy demand and reduce heat gain. Currently, passive design and health are emphasised to link the environmental design approach and architecture and highlight the quality-of-life post-pandemic. The study aims to provide important healthy indoor strategies and passive building performance for open-plan home-office design, to investigate the open-plan home design with optimum thermal performance based on the passive indoor environment, and to examine the bioclimatic response and energy efficiency of home-office design during the pandemic. The responsiveness of bioclimatic and modular construction incorporated with the new home-office design aim to save energy through sustainable material. The Integrated Environmental Solutions Virtual Environment (IESVE) computer software was utilised using simulations involving ranges of illuminance levels in daylight and revealed the acceptable levels of between 300 lux to 500 lux for the home office area. The results demonstrated that the optimum range of solar heat gain coefficient (SHGC) of 0.46 and a U-value of 0.04 W/m2 K reduced the indoor temperature by 5 degrees Celsius during peak time and maintained the air-condition at 28 degrees Celsius, which was within thermal comfort level.
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Zhang, Yuanhao. "An Attempt to Evaluate the Lighting Quantity Indexes of Museum Lighting for Specimen Protection." Biodiversity Information Science and Standards 8 (September 18, 2024). https://doi.org/10.3897/biss.8.137384.
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Museums need to meet the visual comfort of and ensure the exhibition performance for the visitors. Meanwhile, illumination of the collections needs to be carefully managed from the risk management and preventive conservation perspective. Illumination from light-emitting diode (LED) outshines traditional lamps because LED is more sustainable and cost-effective, it also generally gives off less infrared and ultraviolet radiation, thus causing less radiation-induced damage to the collections. Museums have multiple choices for professional practical references on lighting, published by institutions and commissions on illumination at the international or national level. In many of the lighting guidelines, specimens are only roughly classified by light sensitivity categories—either "low responsivity" or nothing—despite the fact that specimens are very different in material and construction. For conservation, it is common to keep the light intensity under 50 lux (lux is the unit for illuminance and the symbol is lx) for low-responsivity exhibited materials. However, this standard could be disputed or even contrary to curators’ expertise and career experience: some specimens fade suddenly and faster within a shorter time while others don’t appear to fade at all. For instance, specimens with structural colour are theoretically less prone to fading than those with pigment colour. Few research cases and research data on specimen samples have demonstrated this theoretical difference in light sensitivity. This means it can be difficult for curators to decide the exhibition time for specimens, or even whether to bring them to the public at all. Thus lacking research and well-developed methodologies about natural history collections in conservation science in Japan, the management of exhibited collections in many natural history exhibition cases tends to be based on standards of cultural collections, especially in small-scale museums and those without natural history curators. The focus of this work is an attempt to evaluate the photon-induced damage and lighting quantity indexes for natural history specimens based on experimental data. Further, interviews with three major natural history museums were conducted to generate collective ideas about lighting management. Experimental specimens The experiment used specimens representing four insect species: Colias eratey, Ruspolia dubia, Favonius orientalis and Phelotrupes laevistriatus. Five specimens of each species with similar initial conditions were selected from Hokkaido University Museum collections for experimental groups and one control group. Colias eratey and Ruspolia dubia represent the pigment colour group while Phelotrupes laevistriatus and Favonius orientalis represent the structural colour group. Illumination parameters The light source was a typical intensity-adjustable LED designed for museums and galleries. Illumination for the experimental groups was set at 50 lx, 100 lx, 150 lx and 200 lx, separately. The control group was set in a completely dark environment. The spectral distribution under each illumination showed no significant differences. Time and evaluation parameters The specimens were irradiated consistently over 180 days for a total of 4320 hours on a measurement cycle of 30 days. A total of seven measurements of the colour space defined by the International Commission on Illumination (CIE L*a*b*Commission Internationale de l’Eclairage 2004), including the initial state, were taken using a colourimeter (3nh NR100). The magnitude of the color difference was measured and compared according to these three values using the following equation: Multiple measuring points were selected for each type of specimen and the average value was calculated. Colour differences with respect to the initial state of each specimen were calculated. These differences were evaluated based on the numerical value: &lt;5 as unnoticeable change; 5&lt;15 as noticeable change; and 15&lt;30 as significant change. In addition, for the structural group, data was also collected with a polarizing filter attached to the colourimeter in an attempt to evaluate the colour difference of the pigment colour layers underlying the structural layer. Data analysis According to CIE (Commission Internationale de l’Eclairage 2004), the limiting annual exposure (illuminance × time) for natural history objects is 150,000 lx⋅h per year in the museum exhibits. In this experiment, the total exposure for four of the experimental groups reached 1.44, 2.88, 4.32 and 5.76 times the recommended limit, simulating the exhibited equivalent exhibition period. Greater illumination resulted in great changes in CIE L*a*b* colour for all experimental groups. Changes in CIE L*a*b* space colour for the control group were also observed. This suggests the potential for the systematic measurement errors, fading due to non-lighting factors and applicability of the measurement method for unevenly coloured natural objects. Colias eratey showed noticeable changes in CIE L*a*b* for all four groups, and the colour difference reached 16 under 200 lx irradiation conditions, while Favonius orientalis showed noticeable changes with all colour differences under three. However, Ruspolia dubia showed no noticeable changes during the experiment, likely because they fade sooner once made into specimens. Data collected from Phelotrupes laevistriatus were not statistically significant because of the colourimeter is designed for measuring flat surfaces, large measuring errors occurred when measuring the semicircular surface of Coleoptera. It is necessary to establish an appropriate experiment methodology for irradiation experiments according to the material characteristics of each natural history object. Doing so enables curators to make accurate conservation plans, especially for precious specimens. In addition, well-designed experiments provide evidence that can be generalized into convenient operational guidelines for museums to use on a daily management basis, and within a limited budget. From the interview research, curators showed a proactive attitude towards carefully considering the aesthetic and conservation aspects of LED as a new light source and growing interest in the conservation and deterioration of exhibited specimens. The management of lighting for natural history materials lacks systematic and unified standards. Curators rely on their own knowledge and experience, sometimes including intuitive sense. In some cases, natural history objects are considered to be expendable, thus less important for keeping long-term conservation in mind. On the other hand, some precious collections are being stored permanently without scientifically proven safe exposure limits. In addition, lack of standards also leads to complex problems. Some museums failed to predict how fast their specimens would fade in the permanent exhibition and failed to prepare replacement for the unsatisfying faded exhibition. On the other hand, some museums prepared a large amount of specimens with strong fading resistance for the replacement, resulting in budget waste and a storage burden.