The Spectrum of the Night Sky Over Kitt Peak: Changes Over Two Decades
نویسندگان
چکیده
منابع مشابه
Changes in Earth's reflectance over the past two decades.
We correlate an overlapping period of earthshine measurements of Earth's reflectance (from 1999 through mid-2001) with satellite observations of global cloud properties to construct from the latter a proxy measure of Earth's global shortwave reflectance. This proxy shows a steady decrease in Earth's reflectance from 1984 to 2000, with a strong climatologically significant drop after 1995. From ...
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The 21st century has witnessed vast amounts of research into blended learning since the conception of online learning formed the possibility of blended learning in the early 1990s. The theme of this paper is blended learning in mainstream disciplinary communities. In particular, the paper reports on findings from the last two decades which looked at origination, development and future of blende...
متن کاملRevisiting youthful sexuality: continuities and changes over two decades
Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. 1 Revisiting youthful sexuality – continuities and changes over two decades
متن کاملRevisiting youthful sexuality: continuities and changes over two decades
Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. 1 Revisiting youthful sexuality – continuities and changes over two decades
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 2010
ISSN: 0004-6280,1538-3873
DOI: 10.1086/656425