360 research outputs found
Discoveries of 3 K-shell Lines of Iron and a Coherent Pulsation of 593-sec from SAX J1748.2-2808
SAX J1748.22808 is a unique X-ray object with a flat spectrum and strong
emission lines at 6.4--7.0 keV. The Suzaku satellite resolved the emission
lines into 3 K-shell lines from neutral and highly ionized irons. A clear
coherent pulsation with a period of 593-sec was found from the Suzaku and
XMM-Newton archives. These facts favor that SAX J1748.22808 isan
intermediate polar, a subclass of magnetized white dwarf binary (cataclysmic
variable: CV). This paper reports on details of the findings and discusses the
origin of this source.Comment: 7 pages, 8 figures, Submitted to PASJ on 2008, May 19, Accepted on
2008, June 2
Hybrid system of communication and radio determination using two geostationary satellites
A new hybrid satellite system which can provide both communications and positioning services in one system using two geostationary satellites is discussed. The distinctive feature is that location information can be provided by transmitting and receiving ranging signals over the same channel as communications through two geostationary satellites
Global Distribution of Fe K alpha Lines in the Galactic Center Region Observed with the Suzaku Satellite
We have surveyed spatial profiles of the Fe K lines in the Galactic
center diffuse X-rays (GCDX), including the transient region from the GCDX to
the Galactic ridge X-ray emission (GRXE), with the Suzaku satellite. We
resolved Fe K line complex into three lines of Fe \emissiontype{I}, Fe
\emissiontype{XXV} and Fe \emissiontype{XXVI} K, and obtained their
spatial intensity profiles with the resolution of \sim \timeform{0D.1}. We
compared the Fe \emissiontype{XXV} K profile with a stellar mass
distribution (SMD) model made from near infrared observations. The intensity
profile of Fe \emissiontype{XXV} K is nicely fitted with the SMD model
in the GRXE region, while that in the GCDX region shows
(\timeform{0D.2}<|l|<\timeform{1D.5}) or (|l|<\timeform{0D.2})
times excess over the best-fit SMD model in the GRXE region. Thus Fe
\emissiontype{XXV} K in the GCDX is hardly explained by the same origin
of the GRXE. In the case of point source origin, a new population with the
extremely strong Fe \emissiontype{XXV} K line is required. An
alternative possibility is that the majority of the GCDX is truly diffuse
optically thin thermal plasma.Comment: Accepted by PAS
Narrative-based research and psychosocial practices in Japan
The aim of this study was to investigate how the narrative mode of thinking creates therapeutic meaning in psychosocial practice in Japan. The main question of research guide was how the narrative mode of thinking can facilitate reconstructing the self. The idea of the Japanese psychologist Hayao Kawai was reviewed. It was indicated that his idea was examined according to the movement of the narrative turn in the field of the practice of human science. The methodology of this study was based on the analysis on the clinical vignette in the field of psychological counseling and the social support for delinquents by group music therapy. Next, the personal life story of a Teacher was analyzed in this study. The point of analysis was focused on the act of meaning making and the semiotic activity of the narrative process. In this point, the Japanese cultural concept of ma was examined, the boundary transitive zone. The concluding remark was that the semiotic activity of meaning was generated and forms the dynamism of tension around opposites. Personal narratives were created in the boundary transitive zone
X-Ray Reflection Nebulae with Large Equivalent Widths of Neutral Iron Ka Line in the Sgr C Region
This paper reports on the first results of the Suzaku observation in the Sgr
C region. We detected four diffuse clumps with strong line emission at 6.4keV,
Ka from neutral or low-ionized Fe. One of them, M359.38-0.00, is newly
discovered with Suzaku. The X-ray spectra of the two bright clumps,
M359.43-0.07 and M359.47-0.15, after subtracting the Galactic center diffuse
X-ray emission (GCDX), exhibit strong Ka line from FeI with large equivalent
widths (EWs) of 2.0-2.2keV and clear Kb of FeI. The GCDX in the Sgr C region is
composed of the 6.4keV- and 6.7keV-associated components. These are
phenomenologically decomposed by taking relations between EWs of the 6.4keV and
6.7keV lines. Then the former EWs against the associated continuum in the
bright clump regions are estimated to be 2.4(+2.3_-0.7)keV. Since the two
different approaches give similar large EWs of 2keV, we strongly suggest that
the 6.4keV clumps in the Sgr C region are due to X-ray reflection/fluorescence
(the X-ray reflection nebulae).Comment: Accepted for publication in PAS
Comparison of Sustained Hemodiafiltration with Acetate-Free Dialysate and Continuous Venovenous Hemodiafiltration for the Treatment of Critically Ill Patients with Acute Kidney Injury
We conducted a prospective, randomized study to compare conventional continuous venovenous hemodiafiltration (CVVHDF) with sustained hemodiafiltration (SHDF) using an acetate-free dialysate. Fifty critically ill patients with acute kidney injury (AKI) who required renal replacement therapy were treated with either CVVHDF or SHDF. CVVDHF was performed using a conventional dialysate with an effluent rate of 25 mL·kg−1 · h−1, and SHDF was performed using an acetate-free dialysate with a flow rate of 300−500 mL/min. The primary study outcome, 30 d survival rate was 76.0% in the CVVHDF arm and 88.0% in the SHDF arm (NS). Both the number of patients who showed renal recovery (40.0% and 68.0%, CVVHDF and SHDF, resp.; P < .05), and the hospital stay length (42.3 days and 33.7 days, CVVHDF and SHDF, resp.; P < .05), significantly differed between the two treatments. Although the total convective volumes did not significantly differ, the dialysate flow rate was higher and mean duration of daily treatment was shorter in the SHDF treatment arm. Our results suggest that compared with conventional CVVHDF, more intensive renal support in the form of post-dilution SHDF with acetate-free dialysate may accelerate renal recovery in critically ill patients with AKI
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