Extrasolar planets and brown dwarfs around AF-type stars - IX. The HARPS southern sample
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DOI: 10.1051/0004-6361/201628805
Abstract: Context. Massive, main-sequence (MS) AF-type stars have so far remained unexplored in past radial velocities (RV) surveys due to their small number of spectral lines and high rotational velocities that prevent the classic RV computation… read more here.
Keywords: occurrence; day period; type stars; day ... See more keywords
A Geo-Tagged COVID-19 Twitter Dataset for 10 North American Metropolitan Areas over a 255-Day Period
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DOI: 10.3390/data6060064
Abstract: One of the unfortunate findings from the ongoing COVID-19 crisis is the disproportionate impact the crisis has had on people and communities who were already socioeconomically disadvantaged. It has, however, been difficult to study this… read more here.
Keywords: day period; 255 day; covid twitter; metropolitan areas ... See more keywords
An In Vivo Study on the Development of Bacterial Microbiome on Clear Orthodontic Retainer
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DOI: 10.3390/dj10120239
Abstract: Objectives: The objective of this study was to see how the bacterial composition changes on clear orthodontic retainer over a 14-day period. Methods: Saliva and plaque samples collected from a clear retainer surface were obtained… read more here.
Keywords: retainer; clear retainer; orthodontic retainer; study ... See more keywords
Relationship between Coronavirus (COVID-19) and Social Factors: Evidence from 24 Countries Over the World During 88-Day Period from Jan 31 to April 27, 2020
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DOI: 10.37506/mlu.v21i1.2351
Abstract: The paper investigates the relationship among social and demographic factors and a new case of spreadingcoronavirus in 24 countries over 88-day period from Jan 31, 2020 to April 27, 2020. This study collectedsecond data from… read more here.
Keywords: april 2020; day period; world; period jan ... See more keywords