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Author Ngadiman, N. F., Shariff, N. N. M., & Hamidi, Z. S. url  doi
openurl 
  Title Sensor Technology for Night Sky Brightness Measurements in Malaysia Type Journal Article
  Year 2020 Publication International Journal of Recent Technology and Engineering (IJRTE) Abbreviated Journal  
  Volume 8 Issue 6 Pages  
  Keywords Instrumentation  
  Abstract Artificial light at night is apparently showing to be a major contributor to the increase of sky brightness at night. The natural darkness in large regions of the world including Malaysia currently is at risk. Hence, some Night Sky Brightness (NSB) measurements in Malaysia were conducted by using several types of light sensors in order to serve quantitative data and spread awareness on this issue. This paper aims to analyze the sensor technology that have been used in night sky brightness measurement in Malaysia as well as to identify recent or significant advances and discoveries in this field of study. In this paper, the author adopted qualitative method through literature review from numerous conducted studies by other researchers in order to perceive better understanding on the use of dedicated light sensor in NSB related research. Starting from 2005 until now, it is noticeable that most of the light sensor used in the NSB studies in Malaysia was Sky Quality Meter (SQM) photometer, equipped with TSL237 sensor which has high irradiance responsivity 2.3kHz/(µW/cm2) @ λp = 524nm and 5 Milion:1 input dynamic range as well as able to sense down to 0.00002 Lux and has typical dark frequency down to 0.1 Hz. The result indicates the relative frequency of the SQM usage in NSB studies was 76% compared to PBM, APC, PMT and CDD of only 4% respectively. SQM has always been the choice of researchers in Malaysia to carry out their sky brightness measurements due to user-friendly implementation besides its reliable data obtained from TSL237 sensor which capable to convert the light directly to frequency without an amplifier or data converter. Thus, the nonlinearities and voltage offsets in the data can be circumvented. A fairly good development of sensor that have been utilized in NSB studies can be discerned patently besides NSB studies will always look forward for a better sensor to further enhance the efforts to map sky brightness for preserving the potential dark sky areas for the sake of astronomy.  
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  Call Number IDA @ intern @ Serial (down) 2968  
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Author Kernbach, M. E., Cassone, V. M., Unnasch, T. R., & Martin, L. B. url  doi
openurl 
  Title Broad-spectrum light pollution suppresses melatonin and increases West Nile virus–induced mortality in House Sparrows (Passer domesticus) Type Journal Article
  Year 2020 Publication The Condor Abbreviated Journal  
  Volume Issue Pages  
  Keywords Animals  
  Abstract Artificial light at night (ALAN) has become a pervasive anthropogenic stressor for both humans and wildlife. Although many negative impacts of ALAN on human health have been identified, the consequences for infectious disease dynamics are largely unexplored. With the increase in popularity of energy efficient light-emitting diodes (LEDs), the effects of spectral composition of ALAN have also come into question. Previous studies showed that exposure to low levels of incandescent ALAN extended the infectious period of House Sparrows (Passer domesticus) infected with West Nile virus (WNV) without affecting mortality rates, thus increasing the pathogen initial reproductive rate (R0) by ~41%. Here, we asked whether exposure to broad-spectrum (3000 K [Kelvin; unit of color temperature]) ALAN suppressed melatonin, a hormone implicated in ALAN-induced physiological consequences, in House Sparrows. We then asked whether amber-hue bulbs (1800 K) could ameliorate the effects of WNV on individual sparrows, and whether broad-spectrum or blue-rich bulbs (3000 K and 5000 K, respectively) could exacerbate them. We found that exposure to low intensity (~5 lux) broad-spectrum (3000 K) ALAN significantly suppressed melatonin levels throughout the night. Second, we found that exposure to broad-spectrum and blue-rich (3000 + 5000 K) lights did not affect WNV viremia but did increase WNV-induced mortality. Conversely, birds exposed to amber-hue (1800 K) ALAN had lower viremia and mortality rates similar to controls (i.e. natural light conditions). This study demonstrates that ALAN affects melatonin regulation in birds, but this effect, as well as ALAN influences on infectious disease responses, can be ameliorated by particular lighting technologies.  
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  Call Number IDA @ intern @ Serial (down) 2967  
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Author Pritchard, S. B., & Le Gallic, S. url  openurl
  Title Light(s) and Darkness(es): Looking Back, Looking Forward Type Journal Article
  Year 2019 Publication Journal of Energy History/Revue d’histoire de l’énergie Abbreviated Journal  
  Volume Issue Pages  
  Keywords Society; Art; History  
  Abstract In this special issue, we argue that light(s) and darkness(es) should be understood in their multiplicity, and that they constitute two aspects of the same phenomenon. They should, therefore, be studied in relation to each other. The complex dynamics of light and dark are more integral to the history of art than other fields, thus offering models for a relational approach to empirical studies beyond this discipline. Drawing on this work, this special issue aims to challenge reductionist frameworks that focus on light alone, without reference to darkness. It explores some of the nuances of light/darkness created by candle, kerosene, oil, gas, and electricity, teasing out the diverse, sometimes contradictory meanings and experiences of light(s) and darkness(es) in the past. It thus aims to study the juxtaposition of light and dark, placing this seeming contrast in dialogue with broader conversations in the history of energy, environmental history, the history of science and technology, as well as the history of representations.  
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  Notes Approved no  
  Call Number IDA @ intern @ Serial (down) 2966  
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Author Beyer, R., Chhabra, E., Galdo, V., & Rama M. url  openurl
  Title Measuring Districts’ Monthly Economic Activity from Outer Space Type Journal Article
  Year 2018 Publication The World Bank Abbreviated Journal  
  Volume Issue Pages  
  Keywords Remote Sensing  
  Abstract Evening-hour luminosity observed using satellites is a good proxy for economic activity. The strengths of measuring economic activity using nightlight measurements include that the data capture informal activity, are available in near real-time, are cheap to obtain, and can be used to conduct very spatially granular analysis. This paper presents a measure of monthly economic activity at the district level based on cleaned Visible Infrared Imaging Radiometer Suite nightlight and rural population. The paper demonstrates that this new method can shed light on recent episodes in South Asia: first, the 2015 earthquake in Nepal; second, demonetization in India; and, third, violent conflict outbreaks in Afghanistan.  
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  Notes Approved no  
  Call Number IDA @ intern @ Serial (down) 2965  
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Author Gălăţanu, C. D., Ashraf, M., Lucache, D. D., Beu, D., & Ciugudeanu, C. url  openurl
  Title OPTICAL UTILIZATION FACTOR FOR ARCHITECTURAL LIGHTING. Type Journal Article
  Year 2019 Publication Light & Engineering Abbreviated Journal  
  Volume 27 Issue 6 Pages 49-57  
  Keywords Lighting  
  Abstract Optical utilization factor (OUF) is applied to architectural lighting, searching to obtain low light pollution. It is demonstrated that OUF could not be used for the assessment of light pollution, because the inter-reflections could not be neglected. DIALUX simulations and MATLAB original functions are used. Onsite measurements for illuminance and luminance are performed. It is demonstrated that OUF could be greater than one for the facade. For the small scale inter-reflections, a luminance gain is demonstrated. Due to this, the floodlighting could be reduced. The understanding about the light pollution assessment is changed, which is a major achievement. It means that a greater OUF don't represent a lower light pollution, and also a facade could be more “visible” on lower level of floodlighting.  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ intern @ Serial (down) 2964  
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