solar ultraviolet
Recently Published Documents


TOTAL DOCUMENTS

1009
(FIVE YEARS 120)

H-INDEX

81
(FIVE YEARS 7)

2022 ◽  
pp. 129-146
Author(s):  
Sachchidanand Singh ◽  
Amit Kumar Mishra ◽  
Sandhya Jose ◽  
Neelesh K. Lodhi

2021 ◽  
Vol 922 (2) ◽  
pp. 218
Author(s):  
Larisza D. Krista ◽  
Matthew Chih

Abstract Solar flares have been linked to some of the most significant space weather hazards at Earth. These hazards, including radio blackouts and energetic particle events, can start just minutes after the flare onset. Therefore, it is of great importance to identify and predict flare events. In this paper we introduce the Detection and EUV Flare Tracking (DEFT) tool, which allows us to identify flare signatures and their precursors using high spatial and temporal resolution extreme-ultraviolet (EUV) solar observations. The unique advantage of DEFT is its ability to identify small but significant EUV intensity changes that may lead to solar eruptions. Furthermore, the tool can identify the location of the disturbances and distinguish events occurring at the same time in multiple locations. The algorithm analyzes high temporal cadence observations obtained from the Solar Ultraviolet Imager instrument aboard the GOES-R satellite. In a study of 61 flares of various magnitudes observed in 2017, the “main” EUV flare signatures (those closest in time to the X-ray start time) were identified on average 6 minutes early. The “precursor” EUV signatures (second-closest EUV signatures to the X-ray start time) appeared on average 14 minutes early. Our next goal is to develop an operational version of DEFT and to simulate and test its real-time use. A fully operational DEFT has the potential to significantly improve space weather forecast times.


2021 ◽  
Vol 9 ◽  
Author(s):  
Alberto Modenese ◽  
Tom Loney ◽  
Marc Rocholl ◽  
Cara Symanzik ◽  
Fabriziomaria Gobba ◽  
...  

Background: Solar UltraViolet Radiation (UVR) is considered the most relevant occupational carcinogenic exposure in terms of the number of workers exposed (i.e., outdoor workers) and UVR-induced skin cancers are among the most frequent types of occupational cancers worldwide. This review aims to collect and evaluate all the available preventive interventions conducted on outdoor workers to reduce their solar UVR related risk, with the final purpose of reducing the burden of occupational skin cancers for outdoor workers.Methods: We will search the following databases for peer-reviewed original research published: MEDLINE (through PubMed), Scopus, and EMBASE. We will include only interventional studies, both randomized and non-randomized, with an adequate comparison group, therefore excluding cross-sectional studies, as well as case-reports/series, reviews, and letters/comments. The systematic review will adhere to the “Preferred Reporting Items for Systematic reviews and Meta-Analyses” (PRISMA) guidelines for reporting systematic reviews. After the literature search, studies to be included will be independently reviewed by two Authors, first based on title and abstract, then based on the full text, according to the inclusion criteria. Conflicts will be solved by a third Author. Two authors will independently extract the required data from included studies and perform quality assessment according to the relevant domain for Risk of Bias assessment proposed by the Cochrane collaboration group. In case of sufficient homogeneity of interventions and outcomes evaluated, results from subgroups of studies will be pooled together in a meta-analysis.Discussion: Following the principles for the evaluation of interventions for cancer prevention established by the International Agency for Research on Cancer, this systematic review will investigate the effectiveness of the interventions, and consequently it will provide reliable indications for the actual reduction of skin cancer incidence in outdoor workers.


2021 ◽  
Vol 46 (10) ◽  
pp. 711-715
Author(s):  
A. A. Nusinov ◽  
P. S. Zavertkin ◽  
D. V. Ivlyushkin ◽  
Yu. M. Kachanovsky ◽  
A. S. Kirichenko ◽  
...  

2021 ◽  
pp. 100055
Author(s):  
Zhi-Ming Mai ◽  
Scott N. Byrne ◽  
Mark P. Little ◽  
Michael R. Sargen ◽  
Elizabeth K. Cahoon

Author(s):  
Claudine Strehl ◽  
Timo Heepenstrick ◽  
Peter Knuschke ◽  
Marc Wittlich

(1) Measuring personal exposure to solar ultraviolet radiation (UVR) poses a major challenges for researchers. Often, the study design determines the measuring devices that can be used, be it the duration of measurements or size restrictions on different body parts. It is therefore of great importance that measuring devices produce comparable results despite technical differences and modes of operation. Particularly when measurement results from different studies dealing with personal UV exposure are to be compared with each other, the need for intercomparability and intercalibration factors between different measurement systems becomes significant. (2) Three commonly used dosimeter types—(polysulphone film (PSF), biological, and electronic dosimeters)—were selected to perform intercalibration measurements. They differ in measurement principle and sensitivity, measurement accuracy, and susceptibility to inaccuracies. The aim was to derive intercalibration factors for these dosimeter types. (3) While a calibration factor between PSF and electronic dosimeters of about 1.3 could be derived for direct irradiation of the dosimeters, this was not the case for larger angles of incidence of solar radiation with increasing fractions of diffuse irradiation. Electronic dosimeters show small standard deviation across all measurements. For biological dosimeters, no intercalibration factor could be found with respect to PSF and electronic dosimeters. In a use case, the relation between steady-state measurements and personal measurements was studied. On average, persons acquired only a small fraction of the ambient radiation.


2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Cheryl E. Peters ◽  
Thomas Tenkate ◽  
Emily Heer ◽  
Rachel O'Reilly ◽  
Sunil Kalia ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document