نتایج جستجو برای: annual solar fraction

تعداد نتایج: 375499  

2009
M. Lockwood M. Owens A. P. Rouillard

[1] We investigate the ‘‘flux excess’’ effect, whereby open solar flux estimates from spacecraft increase with increasing heliocentric distance. We analyze the kinematic effect on these open solar flux estimates of large-scale longitudinal structure in the solar wind flow, with particular emphasis on correcting estimates made using data from nearEarth satellites. We show that scatter, but no ne...

2015
Gang He Daniel M. Kammen

Integrating variable energy resources, notably solar and wind, requires better understanding of where, when and how much of variable resources are available. China's ambitious solar energy development goal will be greatly facilitated by the resources assessment at higher spatial and temporal resolution. We utilized 10-year hourly solar irradiation data from 2001 to 2010 from 200 representative ...

2014
Edward Valachovic Igor Zurbenko

variability only to a long term increasingly upward trend. To isolate and properly investigates the seasonal component and possible relationships with the sources of variation in skin cancer incidence it is necessary to separate uncorrelated obscuring time scales such as random noise and the long term trend [7]. Separation is achieved using a combination of low pass Kolmogorov-Zurbenko Filters ...

2015
J. S. Halekas R. J. Lillis D. L. Mitchell T. E. Cravens C. Mazelle J. E. P. Connerney J. R. Espley P. R. Mahaffy M. Benna B. M. Jakosky J. G. Luhmann J. P. McFadden D. E. Larson S. Ruhunusiri

Mars Atmosphere and Volatile EvolutioN mission (MAVEN) observes a tenuous but ubiquitous flux of protons with the same energy as the solar wind in the Martian atmosphere. During high flux intervals, we observe a corresponding negative hydrogen population. The correlation between penetrating and solar wind fluxes, the constant energy, and the lack of a corresponding charged population at interme...

2010
Michal SOKOLSKÝ Július CIRÁK

The dye-sensitized solar cell (DSSC) has been proven to have a good chance to become a notable competitor for solar cells based on today technology of p-n junction. The principle of operation of DSSC solar cells in comparison with conventional semiconductor solar cells where light absorption and charge carrier transport are done by the semiconductor is different. In DSSC these two tasks are sep...

2016
M. ANDERSEN

The assessment of the solar potential in urban areas relies on a geometrical model that can be defined at different levels of detail (LOD). In this work we compare the solar irradiation simulated on the surfaces of four sample buildings, which were modeled at three different LODs as defined by the CityGML standard. Results indicate a general overestimation of the solar irradiation when using LO...

2015
James Norwood Stefanie Milam Matthew Tiscareno

The James Webb Space Telescope will enable a wealth of new scientific investigations in the nearand midinfrared, with sensitivity and spatial/spectral resolution greatly surpassing its predecessors. In this paper, we focus upon Solar System science facilitated by JWST, discussing the most current information available concerning JWST instrument properties and observing techniques relevant to pl...

2012
Juraj Beták Marcel Šúri Tomáš Cebecauer Artur Skoczek

The study offers updated and more accurate information about long-term annual solar resource in the most countries of Europe, Middle East and North Africa (EU-MENA) and evaluates PV power production potential. The underlying solar radiation and PV electricity output values are calculated form the solar and meteo database SolarGIS, which covers a history of recent 18 years. Direct Normal Irradia...

2012

A hybrid Photovoltaic/Thermal (PV/T) solar system integrates photovoltaic and solar thermal technologies into one single solar energy device, with dual generation of electricity and heat energy. The aim of the present study is to evaluate the potential for introduction of the PV/T technology into Northern China. For this purpose, outdoor experiments were conducted on a prototype of a PV/T water...

Journal: :Health physics 2004
Tetsuya Mizoue

Geographic observation of the increased mortality of some cancers at higher latitudes has led to a hypothesis that vitamin D produced after exposure to solar radiation has anti-carcinogenic effects. However, it is unclear whether such association would be observed in countries like Japan, where fish consumption, and therefore dietary vitamin D intake, is high. Pearson correlation coefficients w...

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