Institution
San Francisco State University
Education•San Francisco, California, United States•
About: San Francisco State University is a education organization based out in San Francisco, California, United States. It is known for research contribution in the topics: Population & Planet. The organization has 5669 authors who have published 11433 publications receiving 408075 citations. The organization is also known as: San Francisco State & San Francisco State Normal School.
Topics: Population, Planet, Context (language use), Poison control, Politics
Papers published on a yearly basis
Papers
More filters
••
TL;DR: Conference sur les affinites entre les Champignons Secotioides et les Agaricaceae et leurs voies evolutives.
Abstract: Conference sur les affinites entre les Champignons Secotioides et les Agaricaceae et leurs voies evolutives
145 citations
••
San Diego State University1, University of Texas at Austin2, University of Hawaii at Manoa3, Harvard University4, University of Copenhagen5, Principia College6, Search for extraterrestrial intelligence7, University of Chicago8, Armagh Observatory9, Korea Astronomy and Space Science Institute10, San Francisco State University11, Johns Hopkins University12, Tel Aviv University13, University of Tübingen14, Ames Research Center15, Georgia State University16, Florida Institute of Technology17, California Institute of Technology18, Northwestern University19
TL;DR: The discovery of Kepler-453 b, a 6.2 R⊕ planet in a low-eccentricity, 240.5 day orbit about an eclipsing binary, was reported in this article.
Abstract: We present the discovery of Kepler-453 b, a 6.2 R⊕ planet in a low-eccentricity, 240.5 day orbit about an eclipsing binary. The binary itself consists of a 0.94 and 0.195 M⊙ pair of stars with an orbital period of 27.32 days. The plane of the planet's orbit is rapidly precessing, and its inclination only becomes sufficiently aligned with the primary star in the latter portion of the Kepler data. Thus three transits are present in the second half of the light curve, but none of the three conjunctions that occurred during the first half of the light curve produced observable transits. The precession period is ~103 years, and during that cycle, transits are visible only ~8.9% of the time. This has the important implication that for every system like Kepler-453 that we detect, there are ~11.5 circumbinary systems that exist but are not currently exhibiting transits. The planet's mass is too small to noticeably perturb the binary, and consequently its mass is not measurable with these data; however, our photodynamical model places a 1σ upper limit of 16 M⊕. With a period 8.8 times that of the binary, the planet is well outside the dynamical instability zone. It does, however, lie within the habitable zone of the binary, making it the third of 10 Kepler circumbinary planets to do so.
145 citations
••
Michigan State University1, San Francisco State University2, Academia Sinica3, Jet Propulsion Laboratory4, Heidelberg University5, Spanish National Research Council6, University of the Basque Country7, Johns Hopkins University8, University of California, Irvine9, INAF10, University of Copenhagen11, Pontifical Catholic University of Chile12, Carnegie Learning13, University College London14, Ohio State University15, Siena College16, University of Ferrara17, California Institute of Technology18, Max Planck Society19
TL;DR: In this paper, the authors compare measurements derived from XMM and Chandra observations with one another and compare both to gravitational lensing mass profiles derived with CLASH Hubble Space Telescope and Subaru Telescope lensing data.
Abstract: We present profiles of temperature, gas mass, and hydrostatic mass estimated from new and archival X-ray observations of CLASH clusters. We compare measurements derived from XMM and Chandra observations with one another and compare both to gravitational lensing mass profiles derived with CLASH Hubble Space Telescope and Subaru Telescope lensing data. Radial profiles of Chandra and XMM measurements of electron density and enclosed gas mass are nearly identical, indicating that differences in hydrostatic masses inferred from X-ray observations arise from differences in gas-temperature measurements. Encouragingly, gas temperatures measured in clusters by XMM and Chandra are consistent with one another at ~100–200 kpc radii, but XMM temperatures systematically decline relative to Chandra temperatures at larger radii. The angular dependence of the discrepancy suggests that additional investigation on systematics such as the XMM point-spread function correction, vignetting, and off-axis responses is yet required. We present the CLASH-X mass-profile comparisons in the form of cosmology-independent and redshift-independent circular-velocity profiles. We argue that comparisons of circular-velocity profiles are the most robust way to assess mass bias. Ratios of Chandra hydrostatic equilibrium (HSE) mass profiles to CLASH lensing profiles show no obvious radial dependence in the 0.3–0.8 Mpc range. However, the mean mass biases inferred from the weak-lensing (WL) and SaWLens data are different. As an example, the weighted-mean value at 0.5 Mpc is 〈b〉 = 0.12 for the WL comparison and 〈b〉 = −0.11 for the SaWLens comparison. The ratios of XMM HSE mass profiles to CLASH lensing profiles show a pronounced radial dependence in the 0.3–1.0 Mpc range, with a weighted mean mass bias value rising to 〈b〉 gsim 0.3 at ~1 Mpc for the WL comparison and 〈b〉 ≈ 0.25 for the SaWLens comparison. The enclosed gas mass profiles from both Chandra and XMM rise to a value ≈1/8 times the total-mass profiles inferred from lensing at ≈0.5 Mpc and remain constant outside of that radius, suggesting that M_gas × 8 profiles may be an excellent proxy for total-mass profiles at ≳ 0.5 Mpc in massive galaxy clusters.
145 citations
••
TL;DR: It is shown that the peak beam intensity can be delivered to any desired location along the trajectory as well as repositioned to a given target after displacement due to propagation through disordered or turbulent media.
Abstract: We demonstrate the projectile motion of two-dimensional truncated Airy beams in a general ballistic trajectory with controllable range and height. We show that the peak beam intensity can be delivered to any desired location along the trajectory as well as repositioned to a given target after displacement due to propagation through disordered or turbulent media.
145 citations
••
TL;DR: Heavy alcohol drinking and use of drugs remain a significant public health problem in this population of Latino gay and bisexual men and transgender persons and drug use was more closely linked to HIV sexual risk behaviors than was heavy drinking.
Abstract: Objectives. We examined HIV prevalence and the socioeconomic correlates of HIV infection, sexual risk behaviors, and substance use among Latino gay and bisexual men and transgender persons in Chicago and San Francisco.Methods. Data were collected from a sample of 643 individuals (Chicago: n=320; San Francisco: n=323) through respondent-driven sampling and computer-assisted self-administered interviews.Results. HIV prevalence in San Francisco (0.325; 95% confidence interval [CI]=0.260, 0.393) was higher than in Chicago (0.112; 95% CI=0.079, 0.163). In San Francisco, HIV prevalence was higher among US-born residents than among those born outside the country; in Chicago, the opposite was true. Heavy use of alcohol was prevalent, especially in Chicago (0.368; 95% CI=0.309, 0.432; San Francisco: 0.154; 95% CI=0.116, 0.192). Drug use and more education were positively correlated and greater age was negatively correlated with unprotected anal intercourse.Conclusions. Heavy alcohol drinking and use of drugs remai...
145 citations
Authors
Showing all 5744 results
Name | H-index | Papers | Citations |
---|---|---|---|
Yuri S. Kivshar | 126 | 1845 | 79415 |
Debra A. Fischer | 121 | 567 | 54902 |
Sandro Galea | 115 | 1129 | 58396 |
Vijay S. Pande | 104 | 445 | 41204 |
Howard Isaacson | 103 | 575 | 42963 |
Paul Ekman | 99 | 235 | 84678 |
Russ B. Altman | 91 | 611 | 39591 |
John Kim | 90 | 406 | 41986 |
Santi Cassisi | 89 | 471 | 30757 |
Peng Zhang | 88 | 1578 | 33705 |
Michael D. Fayer | 84 | 537 | 26445 |
Raymond G. Carlberg | 84 | 316 | 28674 |
Geoffrey W. Marcy | 83 | 550 | 82309 |
Ten Feizi | 82 | 381 | 23988 |
John W. Eaton | 82 | 298 | 26403 |