scholarly journals Miniaturized, light-adaptive, wireless dosimeters autonomously monitor exposure to electromagnetic radiation

2019 ◽  
Vol 5 (12) ◽  
pp. eaay2462
Author(s):  
Kyeongha Kwon ◽  
Seung Yun Heo ◽  
Injae Yoo ◽  
Anthony Banks ◽  
Michelle Chan ◽  
...  
Keyword(s):  
Electromagnetic Radiation ◽  
Field Studies ◽  
Skin Aging ◽  
The Sun ◽  
Power Circuit ◽  
Multiple Wavelengths ◽  
Mode Of Detection ◽  
Ultralow Power ◽  
Lighting Systems ◽  
Wireless Dosimeters

Exposure to electromagnetic radiation (EMR) from the sun and from artificial lighting systems represents a modifiable risk factor for a broad range of health conditions including skin cancer, skin aging, sleep and mood disorders, and retinal damage. Technologies for personalized EMR dosimetry could guide lifestyles toward behaviors that ensure healthy levels of exposure. Here, we report a millimeter-scale, ultralow-power digital dosimeter platform that provides continuous EMR dosimetry in an autonomous mode at one or multiple wavelengths simultaneously, with time-managed wireless, long-range communication to standard consumer devices. A single, small button cell battery supports a multiyear life span, enabled by the combined use of a light-powered, accumulation mode of detection and a light-adaptive, ultralow-power circuit design. Field studies demonstrate single- and multimodal dosimetry platforms of this type, with a focus on monitoring short-wavelength blue light from indoor lighting and display systems and ultraviolet/visible/infrared radiation from the sun.

Ultraviolet Radiation Exposure: Public Health Concerns

2006 ◽  
Vol 10 (3_suppl) ◽  
pp. S8-S13 ◽  
Author(s):  
Jason K. Rivers ◽  
Beatrice Wang ◽  
Danielle Marcoux
Keyword(s):  
Ultraviolet Radiation ◽  
Prolonged Exposure ◽  
Sun Exposure ◽  
Skin Aging ◽  
The Sun ◽  
Solar Insolation ◽  
Health Concerns ◽  
The Public ◽  
The North ◽  
Ultraviolet Radiation Exposure

The North American public maintains an attitude that equates the acquisition of a suntan with health. However, prolonged exposure to ultraviolet radiation from the sun can lead to sunburn, premature skin aging, immunosuppression, and skin cancer. Misconceptions about the risks of tanning beds and the effectiveness of sunscreens are common. The public must be better informed about the importance of and the need for effective sun protection by means of clothing and hats, the proper use of sunscreen, and the avoidance of prolonged sun exposure during the time of maximal solar insolation.

1.5-V-Operation Ultralow Power Circuit of Poly-Si TFTs Fabricated Using the NAOS Method

2012 ◽  
Vol 59 (2) ◽  
pp. 385-392 ◽  
Author(s):  
Yasushi Kubota ◽  
Taketoshi Matsumoto ◽  
Hiroshi Tsuji ◽  
Nobuhiko Suzuki ◽  
Shigeki Imai ◽  
...  
Keyword(s):  
Power Circuit ◽  
Ultralow Power

Ultralow Power Circuit Design With Subthreshold/Near-Threshold 3-D IC Technologies

2015 ◽  
Vol 5 (7) ◽  
pp. 980-990 ◽  
Author(s):  
Sandeep Kumar Samal ◽  
Yarui Peng ◽  
Mohit Pathak ◽  
Sung Kyu Lim
Keyword(s):  
Circuit Design ◽  
Power Circuit ◽  
Ultralow Power ◽  
Near Threshold

scholarly journals Feasibility and acute alerting effects of a daylight-supplementing in-vehicle lighting system – Results from two randomised controlled field studies during dawn and dusk

2021 ◽  
pp. 147715352098237
Author(s):  
M Canazei ◽  
S Staggl ◽  
W Pohl ◽  
S Schüler ◽  
D Betz ◽  
...  
Keyword(s):  
Positive Impact ◽  
Vigilance Task ◽  
Field Studies ◽  
Lighting System ◽  
Experimental Conditions ◽  
Psychomotor Vigilance Task ◽  
Subjective Sleepiness ◽  
Lighting Systems ◽  
Randomised Controlled ◽  
Psychomotor Vigilance

The present studies examined the feasibility and acute alerting effects of additional in-vehicle lighting within a passenger car. These factors were examined during morning driving (Study 1) and evening driving (Study 2). In a balanced within-subjects design, 37 participants drove a test car two times in the morning or in the evening. The test vehicle was equipped with either a daylight-supplementing interior lighting system or a placebo system, which participants were told would refresh the air. Both studies used identical protocols, and participants participated either in Study 1 ( n = 18) or Study 2 ( n = 19). In both studies, corneal illuminance levels were recorded while driving. Feasibility of the systems was assessed using subjective ratings. Efficacy outcomes were spindle rates in the alpha bandwidth of electroencephalogram recordings, performance on a psychomotor vigilance task and subjective sleepiness ratings. In both studies, daylight-supplementing significantly increased corneal illuminances while driving and did not cause any negative visual side-effects. Study 1 revealed lower spindle rates while driving under daylight-supplementing lighting, indicating that drivers had higher physiological alertness when exposed to additional light in the morning. This alerting effect of daylight-supplementing lighting, however, was not observed in Study 2. In both studies, performance on the psychomotor vigilance task as well as subjective sleepiness ratings did not significantly differ between the experimental conditions. The present studies provide novel evidence for the feasibility and positive impact of daylight-supplementing in-vehicle lighting systems on the physiological alertness of drivers under naturalistic driving conditions. Further studies are warranted to evaluate carry-over effects of increased alertness on road safety measures.

scholarly journals Effect of solar activity on electromagnetic fields and seismicity of the Earth

2021 ◽  
Vol 929 (1) ◽  
pp. 012019
Author(s):  
N.T. Tarasov
Keyword(s):  
Solar Activity ◽  
Ionizing Radiation ◽  
Total Energy ◽  
Electromagnetic Radiation ◽  
Electromagnetic Fields ◽  
Geomagnetic Storms ◽  
The Sun ◽  
Strong Earthquakes ◽  
Probability Of Occurrence ◽  
The Earth

Abstract It is shown that bursts of intensity of ionizing electromagnetic radiation from the Sun, as well as geomagnetic storms, cause a statistically significant decrease in the total number of earthquakes on Earth. After bursts of ionizing radiation from the Sun, a statistically significant decrease in the total energy of earthquakes occurs, and after geomagnetic storms, its increase is observed. This is mainly due to an increase in the number of the strongest earthquakes with MS > 7 after geomagnetic storms and a decrease in the number of such earthquakes after bursts of ionizing electromagnetic radiation from the Sun. During geomagnetic storms and for several days after them, the probability of occurrence of strong earthquakes increases more than two times, and after bursts of ionizing electromagnetic radiation from the Sun, this probability decreases almost twice.

scholarly journals Natural Moisturizer Based on Green Grass Jelly (Cyclea Barbata Miers) with Stevia Leaf Addition (Stevia Rebaudiana Bertoni)

2020 ◽  
Vol 17 (1) ◽  
pp. 1
Author(s):  
Ahmad Thoriq Mubarok ◽  
Kun Harismah
Keyword(s):  
Specific Gravity ◽  
Stevia Rebaudiana ◽  
Skin Aging ◽  
Ph Measurement ◽  
The Sun ◽  
Homogeneity Analysis ◽  
Stevia Rebaudiana Bertoni

Skin moisturizer is a chemical that can protect the skin from the sun. Natural ingredients that can be used as a moisturizer are Green Grass Jelly. Green Grass Jelly leaves contain antioxidants that can prevent skin aging. The purpose of this study was to analyze the application of Green Grass Jelly and Stevia as a facial moisturizing ingredient. The variables used in this study were Green Grass Jelly consentration of 2.5%, 5%, 7.5%, and 10%. And stevia benefits 0%, 5%, 7.5%, 10% and 12.5%. the method used is Green Grass Jelly extraction, stevia extraction and moisturizing preparations. The test used were homogeneity analysis, pH measurement, specific gravity, dispersion, emulsion reliability, and organoleptic. Based on SNI-16-4399-1996 all samples that have been made meet the existing standards and also suitable sample formulations are F(D) ie 2.5% Green Grass Jelly composition and 5% stevia.

Performance-enhanced solar-blind photodetector based on a CH3NH3PbI3/β-Ga2O3 hybrid structure

2019 ◽  
Vol 7 (45) ◽  
pp. 14205-14211 ◽  
Author(s):  
Linpeng Dong ◽  
Tiqiang Pang ◽  
Jiangang Yu ◽  
Yucheng Wang ◽  
Wenguo Zhu ◽  
...  
Keyword(s):  
Electromagnetic Radiation ◽  
Hybrid Structure ◽  
The Sun ◽  
Accuracy And Precision ◽  
Solar Blind ◽  
Excellent Accuracy

Solar-blind photodetectors have drawn great attention due to their excellent accuracy and precision ignoring the electromagnetic radiation interference from the sun.

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