285 research outputs found
Pelaksanaan Kebijaksanaan Pelayanan Kesehatan Gratis Bagi Keluarga Miskin (Gakin) di Rumah Sakit Pemerintahan Provinsi Nusa Tenggara Timur (NTT): Studi Kasus di RSUD Prof Dr Wz Johannes Kupang dan RSUD Kabupaten Timor Tengah Selatan
In accordance to the prompt 100 days Program of the "Kabinet Bersatu" government as to improve the quantity and quality of medical staffs, to develop health insurance for poor families, and to improve basic health services; this study aimed to determme free health services for poor families at class 3 public hospitals. It was a survei conducted in 2 public hospitals, Province Hospital Prof. Dr WZ Johannes in Kupang District and District Hospital of Timor Tengah Selatan (TTS) District in SoE in Nusa Tenggara Timur (NTT) Province. Data were collected by interview to poor and non poor families who ever or bemg seeking treatment to and poor families who never seeking treatment to the public hospttals and also by depth interview to the director and staffs of the hospitals. Depth interview on health or poor cards were done in two health centers in Kupang and TTS Districts, respectively. Results showed that there were still lack of medical doctors, no difference satisfaction for class III patients either who used poor or non poor facilities in both public hospitals, budget for free services in the hospitals was largely deficit so the medic and paramedic staffs did not receive medical fees, and also presence poor families who did not know the advantages of healthy cards to receive free health services at class III public hospitals. For optimal services, it is a need to develop new policy on recruitment and placement of medic and paramedic staffs, including to determine district capabilities in providing insentives, and also community demands for health staffs. And it is a need to provide medical fees for service to poor families to maintain quality of health services in long period
A Very Large Array 3.6cm continuum survey of Galactic Wolf-Rayet stars
We report the results of a survey of radio continuum emission of Galactic
Wolf-Rayet stars north of declination -46 degrees. The observations were
obtained at 8.46 GHz (3.6cm) using the Very Large Array (VLA), with an angular
resolution of about 6 x 9 arcsec and typical rms noise of 0.04 mJy/beam. Our
survey of 34 WR stars resulted in 15 definite and 5 probable detections, 13 of
these for the first time at radio wavelengths. All detections are unresolved.
Time variations in flux are confirmed in the cases of WR98a, WR104, WR105 and
WR125. WR79a and WR89 are also variable in flux and we suspect they are also
non-thermal emitters. Thus, of our sample 20-30% of the detected stars are
non-thermal emiters. Average mass loss rates determinations obtained excluding
definite and suspected non-thermal cases give similar values for WN (all
subtypes) and WC5-7 stars, while a lower value was obtained for WC8-9 stars.
Uncertainties in stellar distances largely contribute to the observed scatter
in mass loss rates. Upper limits to the mass loss rates were obtained in cases
of undetected sources or for sources which probably show additional non-thermal
emission.Comment: 21 pages, Latex, 21 postscript figures, to be published in The
Astronomical Journal, May 200
Grouping behavior of Sumatran orangutans (Pongo abelii) and Tapanuli orangutans (Pongo tapanuliensis) living in forest with low fruit abundance
In contrast to the African great apes, orangutans (Pongo spp.) are semisolitary: Individuals are often on their own, but form aggregations more often than expected by chance. These temporary aggregations provide social benefits such as mating opportunities. When fruit availability is high, costs of aggregating should be lower, because competition is less pronounced. Therefore, average party size is expected to be higher when fruit availability is high. This hypothesis would also explain why orangutans in highly fruit‐productive habitats on Sumatra are more gregarious than in the usually less productive habitats of Borneo. Here, we describe the aggregation behavior of orangutans in less productive Sumatran habitats (Sikundur and Batang Toru), and compare results with those of previously surveyed field sites. Orangutans in Sikundur were more likely to form parties when fruit availability was higher, but the size of daily parties was not significantly affected by fruit availability. With regard to between‐site comparisons, average party sizes of females and alone time of parous females in Sikundur and Batang Toru were substantially lower than those for two previously surveyed Sumatran sites, and both fall in the range of values for Bornean sites. Our results indicate that the assessment of orangutans on Sumatra as being more social than those on Borneo needs revision. Instead, between‐site differences in sociality seem to reflect differences in average fruit availability
OpenFermion: The Electronic Structure Package for Quantum Computers
Quantum simulation of chemistry and materials is predicted to be an important
application for both near-term and fault-tolerant quantum devices. However, at
present, developing and studying algorithms for these problems can be difficult
due to the prohibitive amount of domain knowledge required in both the area of
chemistry and quantum algorithms. To help bridge this gap and open the field to
more researchers, we have developed the OpenFermion software package
(www.openfermion.org). OpenFermion is an open-source software library written
largely in Python under an Apache 2.0 license, aimed at enabling the simulation
of fermionic models and quantum chemistry problems on quantum hardware.
Beginning with an interface to common electronic structure packages, it
simplifies the translation between a molecular specification and a quantum
circuit for solving or studying the electronic structure problem on a quantum
computer, minimizing the amount of domain expertise required to enter the
field. The package is designed to be extensible and robust, maintaining high
software standards in documentation and testing. This release paper outlines
the key motivations behind design choices in OpenFermion and discusses some
basic OpenFermion functionality which we believe will aid the community in the
development of better quantum algorithms and tools for this exciting area of
research.Comment: 22 page
Radio continuum and near-infrared study of the MGRO J2019+37 region
(abridged) MGRO J2019+37 is an unidentified extended source of VHE gamma-rays
originally reported by the Milagro Collaboration as the brightest TeV source in
the Cygnus region. Its extended emission could be powered by either a single or
several sources. The GeV pulsar AGL J2020.5+3653, discovered by AGILE and
associated with PSR J2021+3651, could contribute to the emission from MGRO
J2019+37, although extrapolation of the GeV spectrum does not explain the
detected multi-TeV flux. Our aim is to identify radio and NIR sources in the
field of the extended TeV source MGRO J2019+37, and study potential
counterparts that could contribute to its emission. We surveyed a region of
about 6 square degrees with the Giant Metrewave Radio Telescope (GMRT) at the
frequency 610 MHz. We also observed the central square degree of this survey in
the NIR Ks-band using the 3.5 m telescope in Calar Alto. Archival X-ray
observations of some specific fields are included. VLBI observations of an
interesting radio source were performed. We explored possible scenarios to
produce the multi-TeV emission from MGRO J2019+37 and studied which of the
sources could be the main particle accelerator. We present a catalogue of 362
radio sources detected with the GMRT in the field of MGRO J2019+37, and the
results of a cross-correlation of this catalog with one obtained at NIR
wavelengths, as well as with available X-ray observations of the region. Some
peculiar sources inside the ~1 degree uncertainty region of the TeV emission
from MGRO J2019+37 are discussed in detail, including the pulsar PSR J2021+3651
and its pulsar wind nebula PWN G75.2+0.1, two new radio-jet sources, the HII
region Sh 2-104 containing two star clusters, and the radio source NVSS
J202032+363158.Comment: 10 pages, 6 figures, 2 tables, accepted for publication in Astronomy
and Astrophysic
Radio continuum and near-infrared study of the MGRO J2019+37 region
(abridged) MGRO J2019+37 is an unidentified extended source of VHE gamma-rays
originally reported by the Milagro Collaboration as the brightest TeV source in
the Cygnus region. Its extended emission could be powered by either a single or
several sources. The GeV pulsar AGL J2020.5+3653, discovered by AGILE and
associated with PSR J2021+3651, could contribute to the emission from MGRO
J2019+37, although extrapolation of the GeV spectrum does not explain the
detected multi-TeV flux. Our aim is to identify radio and NIR sources in the
field of the extended TeV source MGRO J2019+37, and study potential
counterparts that could contribute to its emission. We surveyed a region of
about 6 square degrees with the Giant Metrewave Radio Telescope (GMRT) at the
frequency 610 MHz. We also observed the central square degree of this survey in
the NIR Ks-band using the 3.5 m telescope in Calar Alto. Archival X-ray
observations of some specific fields are included. VLBI observations of an
interesting radio source were performed. We explored possible scenarios to
produce the multi-TeV emission from MGRO J2019+37 and studied which of the
sources could be the main particle accelerator. We present a catalogue of 362
radio sources detected with the GMRT in the field of MGRO J2019+37, and the
results of a cross-correlation of this catalog with one obtained at NIR
wavelengths, as well as with available X-ray observations of the region. Some
peculiar sources inside the ~1 degree uncertainty region of the TeV emission
from MGRO J2019+37 are discussed in detail, including the pulsar PSR J2021+3651
and its pulsar wind nebula PWN G75.2+0.1, two new radio-jet sources, the HII
region Sh 2-104 containing two star clusters, and the radio source NVSS
J202032+363158.Comment: 10 pages, 6 figures, 2 tables, accepted for publication in Astronomy
and Astrophysic
Non-thermal emission processes in massive binaries
In this paper, I present a general discussion of several astrophysical
processes likely to play a role in the production of non-thermal emission in
massive stars, with emphasis on massive binaries. Even though the discussion
will start in the radio domain where the non-thermal emission was first
detected, the census of physical processes involved in the non-thermal emission
from massive stars shows that many spectral domains are concerned, from the
radio to the very high energies.
First, the theoretical aspects of the non-thermal emission from early-type
stars will be addressed. The main topics that will be discussed are
respectively the physics of individual stellar winds and their interaction in
binary systems, the acceleration of relativistic electrons, the magnetic field
of massive stars, and finally the non-thermal emission processes relevant to
the case of massive stars. Second, this general qualitative discussion will be
followed by a more quantitative one, devoted to the most probable scenario
where non-thermal radio emitters are massive binaries. I will show how several
stellar, wind and orbital parameters can be combined in order to make some
semi-quantitative predictions on the high-energy counterpart to the non-thermal
emission detected in the radio domain.
These theoretical considerations will be followed by a census of results
obtained so far, and related to this topic... (see paper for full abstract)Comment: 47 pages, 5 postscript figures, accepted for publication in Astronomy
and Astrophysics Review. Astronomy and Astrophysics Review, in pres
Massive stars exploding in a He-rich circumstellar medium. I. Type Ibn (SN 2006jc-like) events
We present new spectroscopic and photometric data of the type Ibn supernovae
2006jc, 2000er and 2002ao. We discuss the general properties of this recently
proposed supernova family, which also includes SN 1999cq. The early-time
monitoring of SN 2000er traces the evolution of this class of objects during
the first few days after the shock breakout. An overall similarity in the
photometric and spectroscopic evolution is found among the members of this
group, which would be unexpected if the energy in these core-collapse events
was dominated by the interaction between supernova ejecta and circumstellar
medium. Type Ibn supernovae appear to be rather normal type Ib/c supernova
explosions which occur within a He-rich circumstellar environment. SNe Ibn are
therefore likely produced by the explosion of Wolf-Rayet progenitors still
embedded in the He-rich material lost by the star in recent mass-loss episodes,
which resemble known luminous blue variable eruptions. The evolved Wolf-Rayet
star could either result from the evolution of a very massive star or be the
more evolved member of a massive binary system. We also suggest that there are
a number of arguments in favour of a type Ibn classification for the historical
SN 1885A (S-Andromedae), previously considered as an anomalous type Ia event
with some resemblance to SN 1991bg.Comment: 17 pages including 12 figures and 4 tables. Slightly revised version,
conclusions unchanged, 1 figure added. Accepted for publication in MNRA
Determinant Factors of Dividend Payments in Brazil
This study identifies factors that shaped cash disbursement distribution policies employed by Brazilian public companies listed on the Brazilian Securities, Commodities and Futures Exchange (BM&FBOVESPA) from 1995 to 2011. Relationships between Dividends/Total Assets and potential determinants discussed in the literature, including firm size, corporate governance, profitability, leverage, market to book, liquidity, investment, risk, profit growth, information asymmetry and agency conflict, are examined. The following econometric methods are employed: (1) Tobit, given the nature of the dividend data, and (2) the Generalized Method of Moments (GMM) to control for endogenous regressors. Significant positive variables found include size, return on assets (ROA), market to book, liquidity and profit growth. It can thus be inferred that larger firm size, profitability, market value, liquidity and profit growth correlate with greater firm pro pensity to distribute money to shareholders, thus supporting the theory of corporate finance. Significant negative variables found include leverage, liquidity squared, capex, beta and tag along 100%. It is thus inferred that more significantly leveraged companies that invest more heavily in fixed assets and that exhibit high liquidity, higher risk and less conflict between controlling and minority shareholders will be less likely to pay dividends to shareholders.</p
Spatially resolved STIS spectra of WR+OB binaries with colliding winds
We present spatially resolved spectra of the visual WR+OB massive binaries
WR86, WR146, and WR147, obtained with the Space Telescope Imaging Spectrograph
on board the Hubble Space Telescope. The systems are classified as follows:
WR86 = WC7 + B0 III, WR146 = WC6 + O8 I-IIf, WR147 = WN8 + O5-7 I-II(f). Both
WR146 and WR147 are known to have strong non-thermal radio emission arising in
a wind-wind collision shock zone between the WR and OB components. We find that
the spectra of their O companions show Halpha profiles in emission, indicative
of large mass-loss rates, and consistent with the colliding-wind model. Our
spectra indicate that the B component in WR86 has a low mass-loss rate, which
possibly explains the fact that WR86, despite being a long period WR+OB binary,
was not found to be a strong non-thermal radio emitter. Because of the small
mass-loss rate of the B star component in WR86, the wind collision region must
be closer to the B star and smaller in effective area, hence generating smaller
amounts of non-thermal radio emission. Absolute magnitudes for all the stars
are estimated based on the spectral types of the components (based on the
tables by Schmidt-Kaler for OB stars, and van der Hucht for WR stars), and
compared with actual, observed magnitude differences. While the derived
luminosities for the WC7 and B0 III stars in WR86 are consistent with the
observed magnitude difference, we find a discrepancy of at least 1.5 magnitudes
between the observed luminosities of the components in each of WR146 and WR147
and the absolute magnitudes expected from their spectral types. In both cases,
it looks as though either the WR components are about 2 magnitudes too bright
for their spectral types, or that the O components are about 2 magnitudes too
faint. We discuss possible explanations for this apparent discrepancy.Comment: Accepted for publication in the Astronomical Journa
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