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Institution

Georgia State University

EducationAtlanta, Georgia, United States
About: Georgia State University is a education organization based out in Atlanta, Georgia, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 13988 authors who have published 35895 publications receiving 1164332 citations. The organization is also known as: GSU & Georgia State.


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Journal ArticleDOI
TL;DR: In this article, the authors argue that developing countries contain millions of people who lack access to resources such as clean water, adequate housing, and education for satisfying basic human needs, and that many people in developing countries lack the freedom to make choices in their own lives.
Abstract: The developing countries account for the majority of the world’s population, and are important for this reason alone. In addition, developing countries contain millions of people who lack access to resources such as clean water, adequate housing, and education for satisfying basic human needs. Moreover, many people in developing countries lack the freedom to make choices in their own lives (Sen 1999). These conditions present a moral issue with which we should all be concerned. A further reason to take seriously the “majority world,” from a business and policy perspective, is that the world is becoming increasingly interconnected in economic, social, and cultural terms. Whatever view one takes of trends toward globalization, global business, or global outsourcing, there is agreement that these present important issues and problems, even if one lives in the richer countries. There was at one time some debate as to whether information and communication technologies (ICTs) were relevant to the developing countries, but this debate has been resolved with a clear “yes” answer. The question has now become not whether, but how ICTs can benefit development. ICTs have high potential value across both public and private enterprises; and at multiple levels, for example from software businesses in urban areas to health delivery in rural villages. The application of ICTs to development goals has not always succeeded to date, and indeed there are many examples of partial or complete failure (e.g., Avgerou and Walsham 2000). One particular issue concerns the need to bridge the so-called “digital divide” between those people with the ability to access and use technologies effectively, and those without. The challenge remains to tackle such difficulties and to resolve them.

262 citations

Journal ArticleDOI
TL;DR: In this article, the inclination of active galactic nuclei (AGNs) is determined by mapping the kinematics of their narrow-line regions (NLRs), which are often easily resolved with Hubble Space Telescope [O III] imaging and long-slit spectra from the Space Telescope Imaging Spectrograph.
Abstract: Active galactic nuclei (AGNs) are axisymmetric systems to first order; their observed properties are likely strong functions of inclination with respect to our line of sight (LOS). However, except for a few special cases, the specific inclinations of individual AGNs are unknown. We have developed a promising technique for determining the inclinations of nearby AGNs by mapping the kinematics of their narrow-line regions (NLRs), which are often easily resolved with Hubble Space Telescope [O III] imaging and long-slit spectra from the Space Telescope Imaging Spectrograph. Our studies indicate that NLR kinematics dominated by radial outflow can be fit with simple biconical outflow models that can be used to determine the inclination of the bicone axis, and hence the obscuring torus, with respect to our LOS. We present NLR analysis of 53 Seyfert galaxies and the resulting inclinations from models of 17 individual AGNs with clear signatures of biconical outflows. Our model results agree with the unified model in that Seyfert 1 AGNs have NLRs inclined further toward our LOS than Seyfert 2 AGNs. Knowing the inclinations of these AGN NLRs, and thus their accretion disk and/or torus axes, will allow us to determine how their observed properties vary as a function of polar angle. We find no correlation between the inclinations of the AGN NLRs and the disks of their host galaxies, indicating that the orientation of the gas in the torus is independent of that of the host disk.

262 citations

Journal ArticleDOI
TL;DR: In this paper, an all-sky catalog of 2970 nearby (d. 50 pc), bright (J < 9) M- or late K-type dwarf stars, 86% of which have been confirmed by spectroscopy, is presented.
Abstract: We present an all-sky catalog of 2970 nearby (d . 50 pc), bright (J < 9) M- or late Ktype dwarf stars, 86% of which have been confirmed by spectroscopy. This catalog will be useful for searches for Earth-size and possibly Earth-like planets by future spacebased transit missions and ground-based infrared Doppler radial velocity surveys. Stars were selected from the SUPERBLINK proper motion catalog according to absolute magnitudes, spectra, or a combination of reduced proper motions and photometric colors. From our spectra we determined gravity-sensitive indices, and identified and removed 0.2% of these as interloping hotter or evolved stars. Thirteen percent of the stars exhibit Hα emission, an indication of stellar magnetic activity and possible youth. The mean metallicity is [Fe/H] = -0.07 with a standard deviation of 0.22 dex, similar to nearby solar-type stars. We determined stellar effective temperatures by least-squares fitting of spectra to model predictions calibrated by fits to stars with established bolometric temperatures, and estimated radii, luminosities, and masses using empirical relations. Six percent of stars with images from integral field spectra are resolved doubles. We inferred the planet population around M dwarfs using Kepler data and applied this to our catalog to predict detections by future exoplanet surveys.

262 citations

Journal ArticleDOI
TL;DR: In this article, the discovery of T dwarf companions to the nearby stars HN Peg (G0 V, 18.4 pc, τ ~ 0.3 Gyr) and HD 3651 (K 0 V, 11.1pc, τ~ 7 Gyr).
Abstract: We report the discovery of T dwarf companions to the nearby stars HN Peg (G0 V, 18.4 pc, τ ~ 0.3 Gyr) and HD 3651 (K0 V, 11.1 pc, τ ~ 7 Gyr). During an ongoing survey of 5' × 5' fields surrounding stars in the solar neighborhood with the Infrared Array Camera aboard the Spitzer Space Telescope, we identified these companions as candidate T dwarfs based on their mid-infrared colors. Using near-infrared spectra obtained with SpeX at the NASA Infrared Telescope Facility, we confirm the presence of methane absorption that characterizes T dwarfs and measure spectral types of T2.5 ± 0.5 and T7.5 ± 0.5 for HN Peg B and HD 3651B, respectively. By comparing our Spitzer data to images from the Two Micron All Sky Survey obtained several years earlier, we find that the proper motions of HN Peg B and HD 3651B are consistent with those of the primaries, confirming their companionship. A comparison of their luminosities to the values predicted by theoretical evolutionary models implies masses of 0.021 ± 0.009 and 0.051 ± 0.014 M_⊙ for HN Peg B and HD 3651B, respectively. In addition, the models imply an effective temperature for HN Peg B that is significantly lower than the values derived for other T dwarfs at similar spectral types, which is the same behavior reported by Metchev & Hillenbrand for the young late L dwarf HD 203030B. Thus, the temperature of the L/T transition appears to depend on surface gravity. Meanwhile, HD 3651B is the first substellar companion directly imaged around a star that is known to harbor a close-in planet from radial velocity surveys. The discovery of this companion supports the notion that the high eccentricities of close-in planets like that near HD 3651 may be the result of perturbations by low-mass companions at wide separations.

261 citations

Journal ArticleDOI
TL;DR: The relationship between life satisfaction, social interest, and participation in extracurricular activities was assessed among adolescent students as discussed by the authors, finding that higher social interest was associated with higher levels of overall satisfaction, as well as satisfaction with friends and family.
Abstract: The relationship between life satisfaction, social interest, and participation in extracurricular activities was assessed among adolescent students. A total of 321 high school adolescents (Grades 9–12) were administered a multidimensional measure of life satisfaction and a scale that assessed social interest. Adolescents were also asked to list the number of extracurricular activities that they participated in since their enrollment in high school. Higher social interest was significantly related to higher levels of overall satisfaction, as well as satisfaction with friends and family. Significant race differences were noted. Adolescents who participated in greater numbers of structured extracurricular activities reported higher school satisfaction. The relationship between social interest and actual participation in extracurricular activities was negligible. Implications of these findings, as well as suggestions for future research are provided.

261 citations


Authors

Showing all 14161 results

NameH-indexPapersCitations
Paul M. Thompson1832271146736
Michael Tomasello15579793361
Han Zhang13097058863
David B. Audretsch12667172456
Ian O. Ellis126105175435
John R. Perfect11957352325
Vince D. Calhoun117123462205
Timothy E. Hewett11653149310
Kenta Shigaki11357042914
Eric Courchesne10724041200
Cynthia M. Bulik10771441562
Shaker A. Zahra10429363532
Robin G. Morris9851932080
Richard H. Myers9731654203
Walter H. Kaye9640330915
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202353
2022291
20212,013
20201,977
20191,744
20181,663