Ce 3+ /Tb 3+ ‐coactived NaMgBO 3 phosphors towards versatile applications in white LED, FED and optical anti‐counterfeiting

2021 ◽  
Author(s):  
Junpeng Xue ◽  
Zhongkai Yu ◽  
Hyeon Mi Noh ◽  
Jung Hyun Jeong ◽  
Byung Chun Choi ◽  
...  
Keyword(s):  
White Led

A Study of Optical Properties of a Glass Composition of a ZnO-Bi2O3-P2O5 Glass/Phosphor Composite for a White LED

2015 ◽  
Vol 48 (6) ◽  
pp. 145-150
Author(s):  
Bong-Ki Ryu ◽  
Il-Gu Kim ◽  
Young-Seok Kim ◽  
Jong-Hwan Kim ◽  
Jae-Yeop Jung ◽  
...  
Keyword(s):  
Optical Properties ◽  
Glass Composition ◽  
White Led ◽  
Glass Phosphor

A transient macro model of GGNMOS used in white LED driver ESD protection simulation

2014 ◽  
Author(s):  
Yu-xi Jiang ◽  
Mao-ze Li ◽  
Jiao Li ◽  
Gao-chuang Bai ◽  
Yuan-zhang Guo ◽  
...  
Keyword(s):  
White Led ◽  
Led Driver ◽  
Macro Model ◽  
Esd Protection ◽  
White Led Driver

Tuning luminescence of Ba3Si6O12N2:Eu2+ phosphor for full-spectrum warm white LED lighting

2021 ◽  
pp. 159377
Author(s):  
Lili Liu ◽  
Lei Chen ◽  
Ruixiang Wang ◽  
Yanfei Xiao ◽  
Fengli Yang ◽  
...  
Keyword(s):  
White Led ◽  
Full Spectrum ◽  
Led Lighting

It’s Deeper Than That!: Restorative Justice and the Challenge of Racial Reflexivity in White-led Schools

2021 ◽  
pp. 004208592199841
Author(s):  
Arthur Romano ◽  
Rochelle Arms Almengor
Keyword(s):  
Black Women ◽  
Critical Race Theory ◽  
Restorative Justice ◽  
Case Studies ◽  
Students Of Color ◽  
White Privilege ◽  
Critical Reflection ◽  
White Led ◽  
Race Theory ◽  
Systemic Racism

This paper uses critical race theory to analyze several case studies focused on the experiences of two restorative justice coordinators (RJCs), both Black women and how they understood and responded to perceived racial injustices in urban schools with white leadership. These schools were attempting to address unequal disciplinary practices toward students of color through restorative justice and the RJCs adapted their approaches to addressing racialized dynamics while also developing school-wide networks to foster broader critical reflection on race. They navigated the risks of challenging white privilege and systemic racism both of which at times limited their attempts at influencing change.

scholarly journals Antarctic krill (Euphausia superba) exhibit positive phototaxis to white LED light

Polar Biology ◽  
2021 ◽  
Vol 44 (3) ◽  
pp. 483-489
Author(s):  
Bjørn A. Krafft ◽  
Ludvig A. Krag
Keyword(s):  
Antarctic Krill ◽  
Light Exposure ◽  
Euphausia Superba ◽  
Marine Species ◽  
Artificial Light ◽  
White Led ◽  
Light Emitting ◽  
Positive Phototaxis ◽  
Led Light ◽  
Exposure Experiment

AbstractThe use of light-emitting diodes (LEDs) is increasingly used in fishing gears and its application is known to trigger negative or positive phototaxis (i.e., swimming away or toward the light source, respectively) for some marine species. However, our understanding of how artificial light influences behavior is poorly understood for many species and most studies can be characterized as trial and error experiments. In this study, we tested whether exposure to white LED light could initiate a phototactic response in Antarctic krill (Euphausia superba). Trawl-caught krill were used in a controlled artificial light exposure experiment conducted onboard a vessel in the Southern Ocean. The experiment was conducted in chambers with dark and light zones in which krill could move freely. Results showed that krill displayed a significant positive phototaxis. Understanding this behavioral response is relevant to development of krill fishing technology to improve scientific sampling gear, improve harvest efficiency, and reduce potential unwanted bycatch.

Bismuth Activated Narrow‐Band Cyan Garnet Phosphor Ca 3 Y 2 Ge 3 O 12 :Bi 3+ for NUV‐Pumped White LED Application

2021 ◽  
Author(s):  
Yongwang Li ◽  
Yanqun Shao ◽  
Weibin Zhang ◽  
ShanShan Ye ◽  
Jiangcong Zhou ◽  
...  
Keyword(s):  
Narrow Band ◽  
White Led

scholarly journals LED Illumination Spectrum Manipulation for Increasing the Yield of Sweet Basil (Ocimum basilicum L.)

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 344
Author(s):  
Md Momtazur Rahman ◽  
Mikhail Vasiliev ◽  
Kamal Alameh
Keyword(s):  
Growth Rate ◽  
Fold Increase ◽  
Photosynthetic Photon Flux Density ◽  
Ocimum Basilicum ◽  
Photon Flux ◽  
Photon Flux Density ◽  
White Led ◽  
Experimental Conditions ◽  
Sweet Basil ◽  
Optimal Illumination

Manipulation of the LED illumination spectrum can enhance plant growth rate and development in grow tents. We report on the identification of the illumination spectrum required to significantly enhance the growth rate of sweet basil (Ocimum basilicum L.) plants in grow tent environments by controlling the LED wavebands illuminating the plants. Since the optimal illumination spectrum depends on the plant type, this work focuses on identifying the illumination spectrum that achieves significant basil biomass improvement compared to improvements reported in prior studies. To be able to optimize the illumination spectrum, several steps must be achieved, namely, understanding plant biology, conducting several trial-and-error experiments, iteratively refining experimental conditions, and undertaking accurate statistical analyses. In this study, basil plants are grown in three grow tents with three LED illumination treatments, namely, only white LED illumination (denoted W*), the combination of red (R) and blue (B) LED illumination (denoted BR*) (relative red (R) and blue (B) intensities are 84% and 16%, respectively) and a combination of red (R), blue (B) and far-red (F) LED illumination (denoted BRF*) (relative red (R), blue (B) and far-red (F) intensities are 79%, 11%, and 10%, respectively). The photosynthetic photon flux density (PPFD) was set at 155 µmol m−2 s−1 for all illumination treatments, and the photoperiod was 20 h per day. Experimental results show that a combination of blue (B), red (R), and far-red (F) LED illumination leads to a one-fold increase in the yield of a sweet basil plant in comparison with only white LED illumination (W*). On the other hand, the use of blue (B) and red (R) LED illumination results in a half-fold increase in plant yield. Understanding the effects of LED illumination spectrum on the growth of plant sweet basil plants through basic horticulture research enables farmers to significantly improve their production yield, thus food security and profitability.

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