Chasing the Identification of ASCA Galactic Objects (ChIcAGO) - An X-ray Survey of Unidentified Sources in the Galactic Plane I: Source Sample and Initial Results

We present the Chasing the Identification of ASCA Galactic Objects (ChIcAGO) survey, which is designed to identify the unknown X-ray sources discovered during the ASCA Galactic Plane Survey (AGPS). Little is known about most of the AGPS sources, especially those that emit primarily in hard X-rays (2-10 keV) within the Fx ~ 10–13 to 10–11 erg cm–2 s–1 X-ray flux range. In ChIcAGO, the subarcsecond localization capabilities of Chandra have been combined with a detailed multiwavelength follow-up program, with the ultimate goal of classifying the >100 unidentified sources in the AGPS. Overall to date, 93 unidentified AGPS sources have been observed with Chandra as part of the ChIcAGO survey. A total of 253 X-ray point sources have been detected in these Chandra observations within 3' of the original ASCA positions. We have identified infrared and optical counterparts to the majority of these sources, using both new observations and catalogs from existing Galactic plane surveys. X-ray and infrared population statistics for the X-ray point sources detected in the Chandra observations reveal that the primary populations of Galactic plane X-ray sources that emit in the Fx ~ 10–13 to 10–11 erg cm–2 s–1 flux range are active stellar coronae, massive stars with strong stellar winds that are possibly in colliding wind binaries, X-ray binaries, and magnetars. There is also another primary population that is still unidentified but, on the basis of its X-ray and infrared properties, likely comprises partly Galactic sources and partly active galactic nuclei.Astronom

Chasing the Identification of ASCA Galactic Objects (ChIcAGO): An X-Ray Survey of Unidentified Sources in the Galactic Plane. I. Source Sample and Initial Results

We present the Chasing the Identification of ASCA Galactic Objects (ChIcAGO) survey, which is designed to identify the unknown X-ray sources discovered during the ASCA Galactic Plane Survey (AGPS). Little is known about most of the AGPS sources, especially those that emit primarily in hard X-rays (2-10 keV) within the F_x ~ 10^(–13) to 10^(–11) erg cm^(–2) s^(–1) X-ray flux range. In ChIcAGO, the subarcsecond localization capabilities of Chandra have been combined with a detailed multiwavelength follow-up program, with the ultimate goal of classifying the >100 unidentified sources in the AGPS. Overall to date, 93 unidentified AGPS sources have been observed with Chandra as part of the ChIcAGO survey. A total of 253 X-ray point sources have been detected in these Chandra observations within 3' of the original ASCA positions. We have identified infrared and optical counterparts to the majority of these sources, using both new observations and catalogs from existing Galactic plane surveys. X-ray and infrared population statistics for the X-ray point sources detected in the Chandra observations reveal that the primary populations of Galactic plane X-ray sources that emit in the F_x ~ 10^(–13) to 10^(–11) erg cm^(–2) s^(–1) flux range are active stellar coronae, massive stars with strong stellar winds that are possibly in colliding wind binaries, X-ray binaries, and magnetars. There is also another primary population that is still unidentified but, on the basis of its X-ray and infrared properties, likely comprises partly Galactic sources and partly active galactic nuclei

Perceptual Dynamics of Pluralistic Ignorance and Social Distance: Public Relations Practitioners and Journalists in South Korea

This study examines the social and professional distance characterizing the source-reporter relationship and provides an opportunity to develop a theoretical and methodological model integrating coorientation measures with third-person perceptions. A web survey of 206 public relations practitioners and journalists in South Korea showed both false dissensus and social distance among each professional group as enacted through the source-reporter relationship. Public relations professionals and journalists disagreed with each other and inaccurately predicted responses of the other. Their inaccurate projection of the views of the other profession was greater than their disagreement on two dimensions of conflict and strategy. This study illuminates dimensions of the third-person perception of public relations professionals and journalists, insofar as both journalists and public relations professionals suggested social distance from the other profession similar to the distance they perceived from the general public

A Contingency Explanation of Public Relations Practitioner Leadership Styles: Situation and Culture

Public relations practitioners from the U.S. and South Korea identified preferred leadership styles in routine and non-routine situations. Results of discriminant function analysis suggested that U.S. professionals place greater importance on strategic communication or problem-solving activities than do Korean practitioners. Public relations practitioners prefer leadership characteristics and functions associated with practical and resourceful capabilities in non-routine situations. This preference is most obvious among Korean public relations practitioners. Findings are best explained by cultural and situational contingency perspective of public relations leadership

Cost-efficient nickel-based thermo-electrochemical cells for utilizing low-grade thermal energy

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Past, Present and Future Public Relations In South Korea: Issues, Work Environments, and Leadership

This chapter reports on the issues and concerns of public relations leadership in South Korean contexts. It describes the developmental history of Korean public relations and presents an interview study that explores important current and future leadership issues and values, work environments, and practices in Korean public relations. Many professional and academic associations have focused on public relations. The public relations interview study and the associated survey were conducted as part of a 23-country global-scale investigation of leadership in public relations and communication management sponsored by the Plank Center for Leadership in Public Relations at the University of Alabama. The first area of inquiry in the interviews concerned the two most important issues in current communication and public relations practices in South Korea. Analysis of the findings suggested that the most important issue is social media. The second most important issue was employee communication

Direct Conversion of Low-Grade Waste Heat into Electricity Using Cu-Based Thermoelectrochemical Cells

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Harvesting Low-Grade Waste Heat to Electrical Power Using a Thermoelectrochemical Cell Based on a Titanium Carbide Electrode

Thermoelectrochemical cells (TECs) are efficient energy harvesting devices that convert low-grade waste heat into electricity. However, TECs based on hexacyanoferrate (Fe(CN)(6)(4-)/ Fe(CN)(6)(3-), HCF) require high-cost metal electrodes such as platinum (Pt), hindering their commercialization. Herein, we introduce titanium carbide (TiC) electrodes formed via the thermal decomposition of CH4 as an alternative to Pt electrodes for TECs. Titanium is difficult to be used in TECs, whereas TiC is a promising non-noble metal electrode that can be used in various electrochemical systems because of its excellent stability and reaction kinetics. In this study, the power output of TiC-based TECs was measured to be 397.20 mW.m(-2), which was almost the same as that achieved with Pt. Furthermore, we confirmed that TiC demonstrated long-term stability in the electrolyte cell under operation conditions. The results strongly indicate that TiC can replace Pt as an electrode, paving the way for the commercialization of TECs.11Nsciescopu

Direct Conversion of Low-Grade Waste Heat into Electricity Using Cu-Based Thermoelectrochemical Cells

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arvesting low-grade waste heat to electrical power using a thermo-electrochemical cell based on titanium carbide electrode

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