Relevant bibliographies by topics / Sunlight radiation

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Sunlight radiation'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Sunlight radiation"

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Del Giudice, Stephen M., and James K. Gerstley. "Sunlight-Induced Radiation Recall." International Journal of Dermatology 27, no. 6 (July 1988): 415–16. http://dx.doi.org/10.1111/j.1365-4362.1988.tb02393.x.

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Leigh, Andrea, John D. Close, Marilyn C. Ball, Katharina Siebke, and Adrienne B. Nicotra. "Research note: Leaf cooling curves: measuring leaf temperature in sunlight." Functional Plant Biology 33, no. 5 (2006): 515. http://dx.doi.org/10.1071/fp05300.

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Despite the obvious benefits of using thermography under field conditions, most infrared studies at the leaf level are generally conducted in the laboratory. One reason for this bias is that accuracy can potentially be compromised in sunlight because reflected radiation from the leaf might affect the calculation of the temperature measurement. We have developed a method for measuring leaf temperature in sunlight by using thermal imagery to generate cooling curves from which the time constant for cooling, τ, can be calculated. The original temperature of the sunlit leaf may be determined by extrapolating backwards in time. In the absence of specular reflection, there is close agreement between the extrapolated sunlit temperature and the sunlit temperature recorded by the camera. However, when reflected radiation is high, the difference between the initial (incorrect) temperature determined from the sunlit image and the temperature extrapolated from the cooling curve can be > 2°C. Notably, our results demonstrate a close agreement between the extrapolated sunlit temperature and the temperature of the leaf approximately 1 s after being shaded, suggesting that this shaded image provides a good estimate of the original sunlit temperature. Thus, our technique provides two means for measuring leaf surface temperature in sunlight.
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Hu, Wei Tong, Yu Xuan Zhang, Liang Yu, Wang Sheng Liu, and Li Guo Fan. "Temperature Sensor Anti-Sunlight Radiation Shield Material." Advanced Materials Research 557-559 (July 2012): 324–28. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.324.

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During the day, the air absorption of solar radiation is weaker than either of the temperature sensing element. At night, the infrared radiation of the air capacity and weaker than either of the temperature on the surface of the sensing element.The measured values of the components of any direct exposure to the air temperature during the day the system is higher than the actual temperature at night is lower than the actual temperature. To avoid this radiation error of temperature measurement devices to take effective radiation shielding measures. The thermometer screen is one of them, widely installed in the meteorological observation field.However, the weight of conventional thermometer screen, bulky and not suitable as a portable device and automotive equipment.Small temperature sensor anti-sunlight radiation shield is widely used in a variety of surface weather measurement occasions. This paper describes the developed by the Changchun Meteorological Instrument Research Institute, the temperature sensor anti-solar radiation shield (Model: DZQ03C-X) surface chemical composition.And detailed description of the DZQ03C-X and standard thermometer screen data of the temperature contrast in the same observation locations. Measurement of air temperatures of over 50 civil airports in China are using this DZQ03C-X temperature sensor anti-sunlight radiation shield.
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Perovich, Donald K. "Sunlight, clouds, sea ice, albedo, and the radiative budget: the umbrella versus the blanket." Cryosphere 12, no. 6 (June 27, 2018): 2159–65. http://dx.doi.org/10.5194/tc-12-2159-2018.

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Abstract. The surface radiation budget of the Arctic Ocean plays a central role in summer ice melt and is governed by clouds and surface albedo. I calculated the net radiation flux for a range of albedos under sunny and cloudy skies and determined the break-even value, where the net radiation is the same for cloudy and sunny skies. Break-even albedos range from 0.30 in September to 0.58 in July. For snow-covered or bare ice, sunny skies always result in less radiative heat input. In contrast, leads always have, and ponds usually have, more radiative input under sunny skies than cloudy skies. Snow-covered ice has a net radiation flux that is negative or near zero under sunny skies, resulting in radiative cooling. Areally averaged albedos for sea ice in July result in a smaller net radiation flux under cloudy skies. For May, June, August, and September, the net radiation is smaller under sunny skies.
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Yang, Wen Xiong, and Xiao Zhi Wang. "Radiation and Sunlight Greenhouse Light Environment Model." Applied Mechanics and Materials 716-717 (December 2014): 479–83. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.479.

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This paper outlines the research status of solar radiation at home and abroad, it discusses the weather cloud, greenhouse covering materials and other factors on the effect of light greenhouse environment, at the same time it summarizes the initial results of light greenhouse environment model simulation research, it also points out the research direction of unsolved problems and future on the light greenhouse environment, we consider the sunlight greenhouse with guidance and reference from the angle of light environmental.
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Austin, Craig N., and Wayne F. Wilcox. "Effects of Sunlight Exposure on Grapevine Powdery Mildew Development." Phytopathology® 102, no. 9 (September 2012): 857–66. http://dx.doi.org/10.1094/phyto-07-11-0205.

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Natural and artificially induced shade increased grapevine powdery mildew (Erysiphe necator) severity in the vineyard, with foliar disease severity 49 to 75% higher relative to leaves in full sun, depending on the level of natural shading experienced and the individual experiment. Cluster disease severities increased by 20 to 40% relative to those on check vines when ultraviolet (UV) radiation was filtered from sunlight reaching vines in artificial shading experiments. Surface temperatures of leaves in full sunlight averaged 5 to 8°C higher than those in natural shade, and in one experiment, filtering 80% of all wavelengths of solar radiation, including longer wavelengths responsible for heating irradiated tissues, increased disease more than filtering UV alone. In controlled environment experiments, UV-B radiation reduced germination of E. necator conidia and inhibited both colony establishment (hyphal formation and elongation) and maturity (latent period). Inhibitory effects of UV-B radiation were significantly greater at 30°C than at 20 or 25°C. Thus, sunlight appears to inhibit powdery mildew development through at least two mechanisms, i.e., (i) UV radiation's damaging effects on exposed conidia and thalli of the pathogen; and (ii) elevating temperatures of irradiated tissues to a level supraoptimal or inhibitory for pathogen development. Furthermore, these effects are synergistic at temperatures near the upper threshold for disease development.
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Chen, Cheng, Xi Min Ji, Guang Xian Zhang, Feng Xiu Zhang, and Hui Zheng. "Preparing Gambiered Guangdong Silk with Ultraviolet Radiation and Normal Mud/Fe2+." Advanced Materials Research 690-693 (May 2013): 1358–61. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1358.

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in order that Gambiered Guangdong Silk can be made in normal area with modern technology, the ultraviolet radiation light was instead of sunlight, normal mud/Fe2+ was instead of Pearl River mud. The Gambiered Guangdong Silk was prepared by ultraviolet radiation light and normal mud/Fe2+. The result showed that ultraviolet radiation light and normal mud/Fe2+ could produce Gambiered Guangdong Silk. The color of silk fabric made by ultraviolet radiation light and normal mud/Fe2+ was almost same as that of silk fabric made by sunlight and Pearl River mud. The thickness of silk fabric made by ultraviolet radiation light and normal mud/Fe2+was approximate to that of ilk fabric made by sunlight and Pearl River mud. These means the Gambiered Guangdong Silk can be made in normal area.
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Mohammed, Forqan, and Khalid M. Mousa. "Comparative Studied of Degradation of Textile Brilliant Reactive Red Dye Using H2O2, TiO2, UV and Sunlight." Al-Nahrain Journal for Engineering Sciences 22, no. 1 (March 24, 2019): 31–36. http://dx.doi.org/10.29194/njes.22010031.

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In this study sunlight and UV radiation were used to compare the efficiency of decolorization of textile wastewater containing brilliant reactive red dye K-2BP (λmax = 534 nm) by the advanced oxidation process (AOP) using (H2O2/sunlight, H2O2/UV, H2O2/TiO2/sunlight, and H2O2/TiO2/UV). The results studied the effect of solution pH, applied H2O2 concentration, TiO2 concentration (nanoparticle), and initial dye concentration were studied. The experimental results showed that decolorization percentage with H2O2/sunlight and TiO2/H2O2/sunlight under the following conditions: - reaction time 150 of minutes, [ 500 ppm] H2O2, [100 ppm] TiO2, pH=3, initial dye concentration =15 ppm and at ambient temperature were 95.7% and 98.42% respectively. For the same conditions using H2O2/UV, H2O2/TiO2 /UV, the percentage of decolorization were 97.85% and 96.33% respectively. The results also indicated that the sunlight is more economic and cost-effective than UV radiation.
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Prado, Rhaíssa, Filipe Soares Bertges, Sônia Aparecida Figueiredo, Maria José Vieira Fonseca, Guilherme Diniz Tavares, and Fernanda Maria Vilela. "Photostability of commercial sunscreens upon sunlight exposure." HU Revista 46 (August 17, 2020): 1–9. http://dx.doi.org/10.34019/1982-8047.2020.v46.28819.

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Introduction: The use of sunscreens is recommended to reduce skin damage and prevent skin cancer. However, evidence has shown that sunscreen can undergo degradation processes induced by ultraviolet (UV) radiation which can lead to reduction or loss of photoprotective capacity, generation of free radicals and toxic intermediates which react with skin structures generating biological damage. Objective: To evaluate the photostability of four sunscreen formulations with Sun Protection Factor (SPF) 30 added by different chemical and physical UV filters. Material and Methods: Each product was exposed to solar radiation from 10 a.m. to 15 p.m. (UV index: 6.0). The areas under the curves (AUC) of the absorbance spectrum of the formulations before and after radiation exposure were used to calculate the ratio between the AUC before and after the solar radiation (AUCI). Results: Only two formulations, which presented the AUCI higher than 0.8, were considered photostable. Despite having the same SPF 30, formulations showed different absorption spectrum in regions of UVA1, UVA2 and UVB and the photostability of the products tested varied considerably. Conclusion: The development of photostable formulations is critical because degradation products of UV filters can act as photo-oxidants. Furthermore, increased exposure to UV radiation due to the reduction of the photoprotective capacity of unstable products increases the risk of burns and skin cancer.
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Nowicka, Grażyna. "Promieniowanie słoneczne a witamina D i nowotwory skóry." Studia Ecologiae et Bioethicae 6, no. 1 (December 31, 2008): 6–14. http://dx.doi.org/10.21697/seb.2008.6.1.01.

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Solar radiation is a part of the environment of man. Ultraviolet В radiation in required for the biosynthesis of vitamin D, which is generally associated with calcium metabolism and significantly influences a wide range of metabolic systems, therefore, has a strong influence on human health. However, exposure to sunlight carries potential risks to human health. Ultraviolet radiation is a known carcinogen and excessive sunlight exposure significantly increases risk of skin cancer.
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Dissertations / Theses on the topic "Sunlight radiation"

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Malallah, Yousef Abdalaziz. "A study of the effect of ultraviolet radiation on normal human skin." Thesis, University of Dundee, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364698.

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Mulroy, Louise. "Pulsed radiation studies of photo-protective systems." Thesis, Keele University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388948.

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Felton, Sarah Jane. "The risks and benefits of cutaneous sunlight exposure." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/the-risks-and-benefits-of-cutaneous-sunlight-exposure(846e7001-9c7b-497d-963a-85ebb035b00a).html.

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Background: Recommendations to restrict summer sunlight exposure to prevent skin cancer apparently conflict with requirements to protect bone health through adequate 25-hydroxyvitamin D (25[OH]D) levels, as provided by cutaneous ultraviolet (UV)B exposure. Furthermore, sunlight exposure promotes a feeling of euphoria that is felt to drive further sun-seeking behaviour. Objectives: My principal objective was to examine health risk (DNA damage) and health benefits (25[OH]D gain, and potential cutaneous photoprotection) following low-level summer sunlight exposures in people of light (phototype II) and darker (phototype V) skin. A further objective was to evaluate serum endocannabinoid levels, potential drivers of mood elevation, following these exposures, and to assess for evidence of tanning addiction in a cross-section of psoriasis patients who had received similar low dose UV exposures, as medical phototherapy. Methods: During wintertime, 10 white Caucasians and 6 South Asians aged 18 to 60 years, from Greater Manchester, UK, received a simulated summer's sunlight exposures, specifically 1.3 standard erythemal dose, thrice weekly for 6 weeks, whilst casually dressed. Serum and urine samples and skin colour measurements were taken at baseline, Monday, Wednesday and Friday of week 1 and then weekly, and buttock skin that had received differential UVR exposures was biopsied for immunohistochemical analysis. Phototype II individuals, who are at higher risk of sunburn, were subsequently challenged with 2X minimal erythema dose (MED) UVB on small areas of simulated summer-exposed and photoprotected skin. Separately, a link to an online tanning questionnaire survey was sent to all members of the National Psoriasis Foundation (USA) during my USA field trip. Results: The simulated summer resulted in 50% gain in 25(OH)D for both phototype groups, but significantly more cutaneous DNA damage (cyclobutane pyrimidine dimers, CPD) in phototype II than V (p<0.0001). There was no accumulation of cutaneous CPD after 6 weeks compared with a single UVR exposure in either group, while phototype V individuals had repaired a greater proportion of their CPD 24 hours after final UVR exposure (p<0.0001). Urinary oxidative DNA damage was higher in phototype II throughout the simulated summer (p=0.002) and unaffected by UVR. All individuals had significant skin darkening, and in phototype II, stratum corneum thickness increased significantly (p<0.05). This tanning response provided significant photoprotection against a pro-inflammatory UVB (2X MED) challenge, as shown by reduced erythema and neutrophil influx in skin exposed to the simulated summer than in photoprotected skin (p<0.05 for both). Serum endocannabinoid (2-arachidonoyl glycerol) levels increased significantly during the simulated summer in both phototype groups (p<0.01), peaking at week 2-3. The cross-sectional study of 1,832 psoriasis patients revealed 34% had used sunbeds; 11% of current users fulfilled diagnostic criteria for addictive-like tanning behaviour: female sex, younger age, younger age at psoriasis diagnosis, severe disease and prior phototherapy were significant risk factors for addiction. Discussion: These findings should assist public health guidance on safe sunlight exposure and highlight the need for distinct guidance targeted to different phototype groups. Furthermore, individuals with psoriasis, in particular those who previously received regular UVR exposure, are at high risk of tanning addiction that may be driven by the endocannabinoid system.
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Opitz, Christoph. "Natural Rhythms and Temporal Perception - Visualization of Sunlight Patterns with Energy Monitoring." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/82556.

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In his book Ritual House, Ralph Knowles states, "The houses we inhabit, the cities surrounding our houses, even the clothes we wear - all are shelters we erect against the elements. But they are also manifestations of ancient rituals, developed in response to nature's rhythms" (2006). Implicit within this quote is the importance of nature's rhythms in our lives, particularly those related to the movement of the sun. Many built environments have no connection to the exterior. Those who work in these spaces are disconnected from these natural rhythms and often experience detrimental physiological effects. However, technology has the potential to reintroduce aspects of natural rhythms into built environments. This research crossed disciplinary boundaries separating architecture, engineering, psychology, and building science during the design of an architectural intervention for an interior workspace known as the Sandbox, at Virginia Tech. The design proposal includes skylights that combine Photovoltaic-integrated glazing with LED lighting to create conditions that stimulate the occupants while connecting inside to out. To reestablish a connection to natural rhythms the BIPV energy monitoring is used during the day to record variations in solar radiation which at night are played back through intensity and color variations of LED lighting. The effect of the LED lighting was compared with the sunlight entering through the skylights using quantitative analysis methods and qualitative visual comparison tools including time lapse photos and videos. The research merges architectural design, lighting technology and BIPV to demonstrate a proof-of-concept for the reintroduction of natural rhythms into built environments.
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Farina, Gabriele. "Evaluation of leaf removal strategies and cluster radiation protection on Cabernet Sauvignon grape and wine quality." Master's thesis, ISA-UL, 2016. http://hdl.handle.net/10400.5/13354.

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Mestrado em Viticultura e Enologia - Instituto Superior de Agronomia - UL
With the goal to improve the characteristics of the grapes, a Cabernet sauvignon vineyard in Maule valley (Chile) was subjected to 5 different typologies of defoliation compared with a control not defoliated. Different timing and quality of defoliation were analysed. It was also compared a kaolin based product to reduce the warming effect of the direct light on the clusters. The study of the canopy, through the point quadrat and the leaf area analyses, gave objective parameters and enabled to have a repeatibility on the years. The amount of light in the canopy and the temperature of the clusters were registered for each treatment in three different occasions. At the harvest the berries were counted and divided according the dehydration to understand the damage done by the sun. The influence of the light and the temperature was studied on the chemical composition of the musts of the vintage 2016 and on the wines of the vintage 2015 to find the best correlation between the solar exposition and the quality parameters of the grapes as the flavonoids. The 2015 wine resulted from the same trial was also sensory analysed by a panel to find additional differences between the treatments. If on one hand, the solar light allows to diminish the quantity of green aromas and to improve the chemical characteristics, an over-exposition could be dangerous for the grape. The aim of this study was to find the right compromise to have the benefit of the light without the damage of the heat. According to this research a total defoliation of the cluster zone during the veraison could be a damage for the yield and the sensory characteristics of the wine. On the other hand the “no act” philosophy of the control doesn’t seem a valid solution because it has the worst sensory results. Seems that in this South American context, the best solution could be a treatment that allow the exposition to the light of the cluster avoiding the hottest hours of the day and limiting the warming of the berries
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Verma, Navni. "Modeling Radiation Transport in Biomimetic Configuration of Solar Cells for Enhanced Sunlight Capture Using the Monte Carlo Method." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397213192.

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Maboshe, Wakunyambo. "Investigating the effects of dietary-derived and sunlight-derived vitamin D3 on markers of immune function." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=237073.

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Primarily synthesised via cutaneous exposure to solar ultraviolet B (UVB) radiation, serum vitamin D concentrations, measured as 25-hydroxyvitamin D (25(OH)D), fluctuate according to solar availability. Seasonal variations in vitamin D are common in areas of high or low latitude determined by the distance from the sun. Seasonal variations in blood pressure, immune markers and some diseases including influenza, have also been reported. However, the contributions of UVB light or vitamin D on the immune markers have not been fully determined. Against this background, the purpose of this research was to investigate the effects of UVB light therapy and dietary vitamin D supplementation on markers of immune function. The D SIRe1 study aimed to assess whether dietary-derived 25(OH)D could have similar effects on immune function as light-derived 25(OH)D. The study was an 8-week comparative intervention trial in healthy adults randomised to receive either 3 times weekly UVB radiation (equivalent to doses received during a Grampian-summer) for 4 weeks; or oral vitamin D3 (1000 IU a day for 8 weeks). Total 25(OH)D was measured by dual tandem mass spectrometry of serum samples following removal of protein and de-lipidation, whilst regulatory T cells (Tregs), known for maintaining immune system homeostasis, by flow cytometry. The study showed similar short-term effects between oral vitamin D and UVB exposure on measured outcomes. However, study interpretation was limited by the lack of a placebo group, yet, to our knowledge, this was the first study to directly compare dose-matched UVB therapy and vitamin D supplementation in healthy participants. Using similar laboratory techniques, the D-SIRe2 study, a placebo-controlled trial, assessed short-term (12 weeks) and long-term (43 weeks) effects of vitamin D supplementation on immune markers. Commencing in spring (March) and finishing in winter (January) 2015/2016, the study showed seasonal fluctuations in most immune markers. The fluctuations did not change according to variations in 25(OH)D concentrations nor were they correlated with solar UVB doses, with the exception of T cell proliferative responses, which were positively correlated with daily solar UVB doses. An interesting finding from this study was the prevention of increases in pro-inflammatory IFN-γ cytokine concentrations in the spring and summer time in the vitamin D3 supplemental group versus placebo. IFN-γ concentrations were raised from 7940 pg/mL at baseline in March, to roughly 12400 pg/mL at week 4 and to 13909 pg/mL at week 12 in the placebo group. The concentrations were roughly 1.3 times the mean concentrations measured in the vitamin D group at the timepoints following baseline concentrations of 10678 pg/mL, and 10013 pg/mL and 10233 pg/mL at weeks 4 and 12, respectively. The interactions between solar light or seasonal effects and oral vitamin D supplementation, as well as their individual and combined effects on immune function, are yet to be fully determined. Moreover, the metabolic and physiological implications of seasonal variation in serum 25(OH)D concentration and markers of immune function are currently unknown, requiring further investigation.
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Mwanza, Patrick. "Determination of the effects of sunlight and UV irradiation on the structure, viability and reapplication frequency of the biopesticide cryptophlebia leucotreta granulovirus in the protection against false codling moth infestation of citrus crops." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/6346.

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Cryptophlebia leucotreta granulovirus (CrleGV-SA) is a baculovirus specifically pathogenic to the citrus pest false codling moth, Thaumatotibia leucotreta. CrleGV- SA is formulated as a commercial biopesticide, Cryptogran® (River Bioscience, South Africa). The virus has a stable, proteinaceous crystalline occlusion body (OB) that protects the nucleocapsid. The major limitation to the use of baculoviruses is their susceptibility to the ultraviolet (UV) component of sunlight, which rapidly and greatly reduces their efficacy as biopesticides. The UVA and UVB components are the most destructive to biological organisms. To date no publication has reported the effect of UV on the structure and virulence of CrleGV, or the effectiveness of the OB as a UV protectant. In this study the effect of UV irradiation on the structure and infectivity of pure CrleGV-SA and Cryptogran® was investigated using scanning electron microscopy (SEM), Raman spectroscopy, qPCR, and bioassays. The project included laboratory and field studies. In the laboratory, CrleGV-SA and Cryptogran® were exposed to either UVA or UVB for periods of 24 hours to 7 days before analysis. In the field, Cryptogran® was applied to trees in a citrus orchard with young fruit. The fruit were collected from 24 hours to 28 days after application and bioassays conducted to assess the effect of sunlight over time on virus structure and efficacy when applied to the northern or southern sides of the trees. No surface morphological changes to the virus were detected using SEM. However, small compositional changes were detected by Raman spectroscopy. qPCR and bioassays demonstrated that UV irradiation damaged the viral DNA, greatly reducing the infectivity of pure CrleGV-SA and Cryptogran®. Exposure to UVB reduced the virulence of the virus more than UVA. The field studies revealed that the activity of CrleGV-SA decreased more on the northern side of the trees than on the southern side.
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Hatfield, David Brooke. "The effect of solar radiation on molecular nitrogen emissions originating in the sunlit thermosphere of Earth." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186984.

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The vibrational distribution of N₂ triplet states in the sunlit upper thermosphere of Earth is measured and modeled for the first time. A comparison is made between measured and theoretical limb column emission rates for bands originating from each upper vibrational level of C³Πᵤ(v) and A³Σ⁺ᵤ(v). The measured column emission rates for the Second Positive (2PG) bands are 3.2 (± 0.2), 3.2 (± 0.2) and 0.6 (+0.0, -0.4) kRayleighs for bands originating from C³Πᵤ(0 ≤ v ≤ 2) and 13.3 (± 0.2), 10.0 (± 0.2), 3 (+0, -2) and 2 (+0, -2) kRayleighs for Vegard-Kaplan (VK) bands originating from A³Σ⁺ᵤ (0 ≤ v ≤ 2). Predicted limb column emission rates for C³Πᵤ(v) are in excellent agreement with the measured 2PG intensities, but comparisons of predicted A³Σ⁺ᵤ(v) column emissions to measured VK intensities are poor. Despite this discrepancy, the predicted sum of all A³Σ⁺ᵤ(v) emission rates over all v compared well to the sum of measured VK intensities. This implies that the excitation rate into the N₂ triplet states is well understood, but that the cascade mechanisms are not as yet understood sufficiently to use dayglow N₂ band emissions as remote sensing probes of the sunlit thermosphere. The dayglow N₂ emissions are modeled by extending the existing auroral model to include resonance scattering of sunlight and replacing the precipitating auroral electrons with photoelectrons. The effects of solar resonance scattering on the X¹Σ⁺(g), A³Σ⁺ᵤ and B³Π(g) states are presented as a function of A³Σ⁺ᵤ quenching rate. These theoretical predictions have important implications for the analysis of dayglow and auroral emissions. The effect of resonance scattering on the A³Σ⁺ᵤ state is small, and will not be measurable under auroral conditions. This implies that the measured auroral vibrational population of the A³Σ⁺ᵤ state is valid for sunlit aurora. The population B³Π(g)(v = O) relative to other B³Π(g)(v) states is predicted to be enhanced by sunlight. A novel set of computer variables based on tree structures was created to manage the information used. These variables are described in detail and were found to be useful tools for the creation and extension of computer models treating diatomic species.
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Tapachès, Émeric. "Estimation du potentiel de la technologie solaire thermodynamique à concentration en climat non désertique - Application à La Réunion." Thesis, La Réunion, 2015. http://www.theses.fr/2015LARE0011/document.

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Le travail de recherche présenté s'inscrit pleinement dans les préoccupations énergétiques de la Réunion, en proposant d'évaluer le potentiel de la technologie solaire thermodynamique avec ou sans système à concentration en zone tropicale et les réseaux électriques non interconnectés. Le solaire thermodynamique désigne la production d'électricité à partir du rayonnement solaire via un cycle thermodynamique. En soumettant le cycle thermodynamique à une source « froide » (eau ou air ambiant) et une source « chaude » générée par des capteurs solaires l'on obtient un travail mécanique en sortie de turbine. En couplant la turbine à un alternateur de l'électricité est produite. Utilisation de capteurs à faible ou sans concentration permettent de diminuer le seuil de rentabilité des installations solaires thermodynamiques. Dans ce cas, ce type de technologie n'est plus réservé aux climats désertiques ou méditerranéens. Une étude préliminaire montre qu'elles sont exploitables en zone tropical. De plus, le couplage de l'installation à des systèmes de stockage thermique ou à des installations d'appoint utilisant de la biomasse par exemple permet de produire une énergie électrique de façon continue. Ce projet de recherche à pour but de définir les technologies adéquates, étudier finement les microclimats locaux propices à ces technologies et de réaliser un modèle numérique pour l'étude des conditions d'opération des installations solaires thermodynamiques. Ce projet permettra d'explorer une filière énergétique d'avenir et développer une expertise locale qui contribuera au rayonnement de la Réunion dans la zone océan Indien
This thesis focuses on the study of the direct solar resource received in Reunion and numerical modeling of a solar power plant consists of: 1 / a field of linear Fresnel collectors in which circulates synthetic oil; 2 / two sensible heat storage tanks; 3 / an organic Rankine cycle. The main goal is to evaluate the performance of such power plant in the island area identified as suitable.To meet this goal, several studies have been conducted: (i) a beam solar radiation map of Reunion was made from satellite images of MeteoSat 7. This map was used to assess the availability of this resource; (ii) a new global-to-diffuse irradiance decomposition model was made from based-ground measurements at Saint-Pierre. This model is based on the representation of higher probabilities of occurrence of the diffuse fraction; (iii) the geometry of the solar collector and beam solar irradiance were modeled from an existing ray-tracing code. This code has been used, firstly, to dimension the collector using an optimization method. And secondly, to develop a fast method in order to simulate absorbed flux distribution on the linear receiver elements; (iv) unsteady-state heat transfers within the solar collector was modeled with a nodal approach; (v) annual electricity production of the power plant running in the south of the island was simulated with a monitoring and control strategy relevant for the demand of the local electricity grid.The models that have been developed during this thesis are design support tools and allow the study of control strategies control of solar power plants with linear Fresnel collector
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Books on the topic "Sunlight radiation"

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Lillyquist, Michael J. Sunlight and health. New York: Dodd, Mead, 1985.

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Reflecting sunlight: The ethics of solar radiation management. Lanham, Md: Lexington Books, 2012.

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Burton, Jane. The nature and science of sunlight. Milwaukee: Gareth Stevens Pub., 1997.

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4

Patrias, Karen. Sunlight, ultraviolet radiation, and the skin: January 1984 through April 1989 : 521 citations. Bethesda, Md: U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, National Library of Medicine, Reference Section, 1989.

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Lillyquist, Michael J. Sunlight & health: the positive and negative effects of the sun on you. New York: Dodd, Mead & Co., 1985.

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Stanley, Tomm. Going solar: Understanding and using the warmth in sunlight. Christchurch, N.Z: Stonefield Pub., 2004.

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M, Gourley Gail, ed. Protect your life in the sun: How to minimize your exposure to ultraviolet sunlight and prevent skin cancer and eye disorders. Albuquerque, NM: High Light Pub., 1993.

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Stamatas, Georgios N. Photobiology of infant skin. Hauppauge, N.Y: Nova Science, 2010.

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Marks, Ronald. Sun-damaged skin. London: Dunitz, 1992.

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Stamatas, Georgios N. Photobiology of infant skin. New York: Nova Biomedical Press, 2010.

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Book chapters on the topic "Sunlight radiation"

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Moan, Johan Emilian, Zivile Baturaite, Arne Dahlback, and Alina Carmen Porojnicu. "Ultraviolet Radiation and Cutaneous Malignant Melanoma." In Sunlight, Vitamin D and Skin Cancer, 359–74. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0437-2_20.

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Gálvez García, A. M. "Preventive Suggestions to Avoid Excessive Sunlight Exposure." In Skin Cancer and UV Radiation, 920–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60771-4_110.

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Holick, Michael F. "Sunlight, Ultraviolet Radiation, Vitamin D and Skin Cancer." In Sunlight, Vitamin D and Skin Cancer, 1–16. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0437-2_1.

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Holick, Michael F. "Sunlight, UV Radiation, Vitamin D, and Skin Cancer: How Much Sunlight Do We Need?" In Sunlight, Vitamin D and Skin Cancer, 19–36. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46227-7_2.

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Reichrath, Jörg. "Solar Ultraviolet Radiation, Vitamin D and Skin Cancer Surveillance in Organ Transplant Recipients (OTRS)." In Sunlight, Vitamin D and Skin Cancer, 253–71. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0437-2_14.

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Saternus, Roman, Thomas Vogt, and Jörg Reichrath. "Update: Solar UV Radiation, Vitamin D, and Skin Cancer Surveillance in Organ Transplant Recipients (OTRs)." In Sunlight, Vitamin D and Skin Cancer, 335–53. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46227-7_17.

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Kesavan, Jana S., and Jose-Luis Sagripanti. "Disinfection of Airborne Organisms by Ultraviolet-C Radiation and Sunlight." In Aerosol Science, 417–39. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118682555.ch17.

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Reichrath, Jörg. "Lessons Learned from Paleolithic Models and Evolution for Human Health: A Snap Shot on Beneficial Effects and Risks of Solar Radiation." In Sunlight, Vitamin D and Skin Cancer, 3–15. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46227-7_1.

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Preto, Sandra, and Cristina Caramelo Gomes. "Ultraviolet Radiation in Sunlight and Artificial Lighting Systems: Are They Alike?" In Advances in Intelligent Systems and Computing, 287–98. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60825-9_32.

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Ullrich, Stephen E. "Mechanisms by Which UV Radiation, a Natural Component of Sunlight, Suppresses the Immune Response." In Environmental Influences on the Immune System, 155–79. Vienna: Springer Vienna, 2016. http://dx.doi.org/10.1007/978-3-7091-1890-0_7.

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Conference papers on the topic "Sunlight radiation"

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Perera, Sharmila C., and Anthony P. Cullen. "Sunlight and human conjunctival action spectrum." In Ultraviolet Radiation Hazards. SPIE, 1994. http://dx.doi.org/10.1117/12.180814.

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Sule, A. H. "Consequence of sunlight radiation exposure on desktop computer keyboard." In 2016 Third International Conference on Electrical, Electronics, Computer Engineering and their Applications (EECEA). IEEE, 2016. http://dx.doi.org/10.1109/eecea.2016.7470762.

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Yu, Zhongfu. "Light Trapping for Managing Broadband Radiation: Sunlight and Thermal Emission." In Laser Science. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/ls.2012.lw5h.4.

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Verma, Navni N., and Sandip Mazumder. "An Investigation of Solar Trees for Effective Sunlight Capture Using Monte Carlo Simulations of Solar Radiation Transport." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36085.

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Solar photovoltaic cells arranged in complex three-dimensional leaf-like configurations — referred to as a solar tree — can potentially collect more sunlight than traditionally used flat configurations. It is hypothesized that this could be because of two reasons. First, the three-dimensional space can be utilized to increase the overall surface area over which the sunlight may be captured. Second, as opposed to traditional flat panel configurations where the capture efficiency decreases dramatically for shallow angles of incidence, the capture efficiency of a solar tree is hampered little by shallow angles of incidence due to the three-dimensional orientation of the solar leaves. In this paper, high fidelity Monte Carlo simulation of radiation transport is conducted to gain insight into whether the above hypotheses are true. The Monte Carlo simulations provide local radiation flux distributions in addition to global radiation flux summaries. The studies show that except for near-normal solar incidence angles, solar trees capture sunlight more effectively than flat panels — often by more than a factor of 5. The Monte Carlo results were also interpolated to construct a daily sunlight capture profile both for mid-winter and mid-summer for a typical North American city. During winter, the solar tree improved sunlight capture by 227%, while in summer the improvement manifested was 54%.
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Cetiner, Matt, P. Singh, J. Abes, and A. Gilroy-Scott. "UV Degradation of Fusion Bonded Epoxy Coating in Stockpiled Pipes." In 2000 3rd International Pipeline Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/ipc2000-181.

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Sunlight exposure is known to cause degradation in polymer coatings. However, quantitative data relating exposure to mechanical and corrosion properties is missing. Thus, it is very difficult for pipeline operators to make fair assessment of the impact of stockpiling coated pipe on project economics and pipeline integrity. As a result, a study was undertaken to quantify the effects of sunlight exposure on Fusion Bonded Epoxy (FBE) coating on stockpiled pipe. Sections of production pipe stockpiled in the southern Alberta area for the Alliance Pipeline project was selected, and a plan to evaluate the coating properties at periodic exposure intervals, to a total duration of approximately 2 years was implemented. The coating was tested at both full sunlight exposure condition (12 o’clock position) and with minimal exposure condition (6 o’clock position). The properties evaluated include residual coating thickness, cathodic disbondment, adhesion, flexibility, and impact. These tests were carried out following procedures in CSA Z245.20–98 standard. Results after 15–21 months of aging indicate that the coating with full sunlight exposure, had a reduction in thickness, flexibility and loss of gloss with chalking due to degradation of the FBE coating by the UV radiation. However, there were no significant differences for cathodic disbondment, adhesion, and impact properties compared to the 6 o’clock position.
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Phelan, P. E., R. Taylor, R. Adrian, R. S. Prasher, and T. Otanicar. "Photothermal Energy Conversion in Liquid Nanoparticle Suspensions." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30172.

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Liquid nanoparticle suspensions, popularly termed “nanofluids,” have been the subject of numerous investigations because of their interesting thermal transport properties. Their propensity to scatter and absorb electromagnetic radiation enables other applications that can take advantage of both their radiative and thermal transport properties. In particular, we are working to develop direct-absorption solar thermal collectors in which nanofluids serve to absorb incident sunlight, thus heating the fluid directly and more efficiently than conventional solar collectors. Our experimental results, in which we irradiate nanofluids with a continuous-wave laser, demonstrate that boiling can be induced at lower incident light fluxes compared to a thin layer of pure water in front of a black absorptive backing. These findings suggest that improved solar energy conversion systems can be developed, including solar-driven direct-steam generators.
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Gonome, Hiroki, Mehdi Baneshi, Atsuki Komiya, and Shigenao Maruyama. "Control of Radiative Properties of Coatings Pigmented With Fe2O3 Nanoparticles." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44622.

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This study describes nanoparticles pigmented coatings used in controlling the radiative properties of surfaces exposed to sunlight. An optimization method that embraces both thermal and aesthetic requirements has been proposed. The proposed coatings maximize the reflectivity of the near infrared (NIR) region to reduce thermal heating, while for aesthetic appeal they minimize the visible (VIS) reflected energy. This spectral behavior can be achieved by controlling the size and concentration of pigment particles and coating thickness. In this study, both experimental and numerical approaches are applied on Fe2O3 pigmented coating samples with 0.2 μm and 1 μm of average particle size and different particle concentrations and coating thicknesses. For numerical part the radiation analysis using the Radiation Element Method by Ray Emission Model (REM2) in a one dimensional parallel plane model is conducted. From the numerical results, it is shown that the optimum size of Fe2O3 particles for our desired spectral behavior is about 0.8 μm. The experimental results also show that the samples made from 1 μm particles have better performance for our objective.
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Whitaker, T., and G. Bekov. "Field ionization of alkali-metal Rydberg states formed by resonance absorption of sunlight: Application as an ultraviolet radiation detector." In The 7th international symposium: Resonance ionization spectroscopy 1994. AIP, 1995. http://dx.doi.org/10.1063/1.47542.

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Verma, Navni N., and Sandip Mazumder. "ARE SOLAR TREES A BETTER WAY TO CAPTURE SUNLIGHT? A FEASIBILITY STUDY USING MONTE CARLO SIMULATIONS OF SOLAR RADIATION TRANSPORT." In Proceedings of CHT-15. 6th International Symposium on ADVANCES IN COMPUTATIONAL HEAT TRANSFER , May 25-29, 2015, Rutgers University, New Brunswick, NJ, USA. Connecticut: Begellhouse, 2015. http://dx.doi.org/10.1615/ichmt.2015.intsympadvcomputheattransf.480.

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DeVore, John, A. T. Stair, Thomas Humpherys, Valery Sinelshchikov, Ilya Schiller, Victor Misnik, Vladimir Ivanov, et al. "U.S.-Russian cooperation in experimental studies to measure polarization of sunlight scattered from clouds and propagation of radiation through clouds." In Remote Sensing, edited by Klaus Schäfer, Adolfo Comerón, James R. Slusser, Richard H. Picard, Michel R. Carleer, and Nicolaos I. Sifakis. SPIE, 2005. http://dx.doi.org/10.1117/12.627692.

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Reports on the topic "Sunlight radiation"

1

Kesavan, Jana, and Jose-Luis Sagripanti. Disinfection of Airborne Organisms by Ultraviolet-C Radiation and Sunlight. Fort Belvoir, VA: Defense Technical Information Center, July 2012. http://dx.doi.org/10.21236/ada566495.

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