scholarly journals The Design and Comparison of Central and Distributed Light Sensored Smart LED Lighting Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Mehmet Ali Özçelik
Keyword(s):  
Cost Effective ◽  
Test Results ◽  
Electrical Measurements ◽  
Central System ◽  
Led Lighting ◽  
Illumination System ◽  
Light Sensor ◽  
Lighting Systems ◽  
Sufficient Test ◽  
Made In

There is a lack of published peer-reviewed research comparing the efficiencies of distributed versus central sensor-controlled LED lighting systems. This research proposes improving the smart illumination of a room with external fenestration using central and distributed light sensors. The optical and electrical measurements of the daylight have been made in the case where the light was not distributed evenly and not sufficient. Test results show that the proposed distributed light sensor illumination system has increased the efficiency by 28% when compared to the proposed central system. It has also been shown that the two tested systems are more cost-effective than common smart illumination systems.

scholarly journals Disturbances Generated by Lighting Systems with LED Lamps and the Reduction in Their Impacts

2019 ◽  
Vol 9 (22) ◽  
pp. 4894 ◽  
Author(s):  
Putz ◽  
Bednarek ◽  
Nawrowski
Keyword(s):  
Power Supply ◽  
Final Part ◽  
Test Results ◽  
Two Stage ◽  
Higher Harmonics ◽  
Led Lighting ◽  
Electrical Systems ◽  
Lighting Systems ◽  
Electromagnetic Disturbances

The paper deals with electromagnetic disturbances in the form of current higher harmonics, which are generated by LED lighting elements. It presents the problems related to the formation and impact of higher harmonics in the electrical systems of commercial facilities. The results of tests and analyses of current distortions for two different LED lamps are included, and these are in reference to the parameters set out in the normal applicable standards. A system was then proposed to improve the quality of energy in the mains of commercial facilities in the form of a two-stage power supply. Tests of the systems with the aforementioned LED lamps were conducted and commented upon after introduction of the two-stage power supply. The final part of the paper contains a summary of the obtained test results.

scholarly journals Design of a phosphor-converted LED based lighting system considering both the lighting and color uniformity

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Jinren Yan
Keyword(s):  
Optical Model ◽  
Color Temperature ◽  
Lighting System ◽  
Target Region ◽  
Led Lighting ◽  
Illumination System ◽  
Color Uniformity ◽  
Lighting Systems ◽  
Freeform Lens ◽  
Better Than

AbstractIn this work, a scheme of combining an aspheric reflector and a primary packaging freeform lens in phosphor-converted lighting-emitting diode (pc-LED) based lighting system design was developed. In contrast to most of previous works in which the color and illumination uniformity of the pc-LED lighting systems were improved one by one, the developed scheme can improve both indicators simultaneously. To demonstrate the feasibility of the developed design scheme, an initially designed pc-LED optical model, with an average correlated color temperature (CCT) of about 5000 K, was constructed as the light source of the illumination system. The key ingredient to the color uniformity of the illumination system was investigated at first, and then several instances with the cut-off angle ranging from 40 to 60 degrees were further discussed. Detailed analysis shows: for each case, the CCT variation decreases from over 4000 K to smaller than 300 K and the illumination uniformity increases from a very low level to better than 80% on the target region.

ЦИФРОВОЙ ИЗОЛЯТОР В СПЕЦИАЛИЗИРОВАННОМ КОРПУСЕ, ВЫПОЛНЕННОМ ПО ТЕХНОЛОГИИ LTCC

2020 ◽  
Vol 96 (3s) ◽  
pp. 392-395
Author(s):  
В.А. Бутузов ◽  
А.Е. Назаренко ◽  
Н.Ю. Дмитриев ◽  
В.А. Трофимов ◽  
В.А. Косевский ◽  
...  
Keyword(s):  
Low Temperature ◽  
Data Rate ◽  
Test Results ◽  
Made In

Представлены результаты разработки цифрового изолятора на основе интегрального микротрансформатора в специализированном корпусе, выполненном по технологии низкотемпературной совместно обжигаемой керамики (LTCC). Согласно результатам измерений тестовых образцов максимальная скорость передачи данных разработанного цифрового изолятора - не менее 30 Мбит/с. The paper presents the results of the development of a digital insulator based on an integral microtransformer in a specialized package made in technology of low-temperature co-fired ceramics. The isolator is a microassembly consisting of a transceiver chip and an integrated transformer. According to the test results, the maximum data rate speed of the developed digital insulator is not less than 30 Mbit/s.

scholarly journals NOD: a web server to predict New use of Old Drugs to facilitate drug repurposing

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tarun Jairaj Narwani ◽  
Narayanaswamy Srinivasan ◽  
Sohini Chakraborti
Keyword(s):  
Chemical Space ◽  
Web Server ◽  
Drug Repurposing ◽  
Cost Effective ◽  
Evolutionary Information ◽  
Cost Effective Alternative ◽  
Similarity Searches ◽  
Old Drugs ◽  
Control Study ◽  
Made In

AbstractComputational methods accelerate the drug repurposing pipelines that are a quicker and cost-effective alternative to discovering new molecules. However, there is a paucity of web servers to conduct fast, focussed, and customized investigations for identifying new uses of old drugs. We present the NOD web server, which has the mentioned characteristics. NOD uses a sensitive sequence-guided approach to identify close and distant homologs of a protein of interest. NOD then exploits this evolutionary information to suggest potential compounds from the DrugBank database that can be repurposed against the input protein. NOD also allows expansion of the chemical space of the potential candidates through similarity searches. We have validated the performance of NOD against available experimental and/or clinical reports. In 65.6% of the investigated cases in a control study, NOD is able to identify drugs more effectively than the searches made in DrugBank. NOD is freely-available at http://pauling.mbu.iisc.ac.in/NOD/NOD/.

An Extended Design Methodology for LED Lighting Systems Including Lifetime Estimation

2016 ◽  
Vol 63 (12) ◽  
pp. 4852-4859 ◽  
Author(s):  
Ronaldo Antonio Guisso ◽  
Matheus Farencena Righi ◽  
Edilson Mineiro Sa ◽  
Rafael Adaime Pinto ◽  
Vitor Cristiano Bender ◽  
...  
Keyword(s):  
Design Methodology ◽  
Lifetime Estimation ◽  
Led Lighting ◽  
Lighting Systems

IoT Based Bus Tracking System

2021 ◽  
Vol 9 (VI) ◽  
pp. 2889-2893
Author(s):  
Miss Payal W. Paratpure
Keyword(s):  
Tracking System ◽  
Cost Effective ◽  
Raspberry Pi ◽  
Accurate Estimation ◽  
Time Of Arrival ◽  
Test Results ◽  
Cloud Server ◽  
Bus Operator ◽  
Gps Device

Tracking of public bus location requires a GPS device to be installed, and lots of bus operators in developing countries don't have such an answer in situ to supply an accurate estimation of bus time of arrival (ETA). Without ETA information, it's very difficult for the overall public to plan their journey effectively. In this paper, implementation of an innovative IOT solution to trace the real time location of buses without requiring the deployment of a GPS device is discussed. It uses Bluetooth Low Energy (BLE) proximity beacon to trace the journey of a bus by deploying an Estimate location beacon on the bus. BLE detection devices (Raspberry Pi 4) are installed at selected bus stops along the path to detect the arrival of buses. Once detected, the situation of the bus is submitted to a cloud server to compute the bus ETAs. A field trial is currently being conducted in Johor, Malaysia together with an area bus operator on one single path. Our test results showed that the detection of BLE beacons is extremely accurate and it's feasible to trace the situation of buses without employing a GPS device during a cost-effective way.

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