17,316 research outputs found
The Empowerment of the Rumah Belajar CSR PT. Antam Tbk. in Improving Education to the Community
This devotion aimed to improve the service of CSR PT. Antam Ltd. by empowering Rumah Belajar Masyarakat (Home Learning Communities) in the village Hakatutobu, Kecamatan Pomalaa. The issue was raised based on observations made on the activities of Rumah Belajar Masyarakat contributed by the CSR PT. Antam Ltd. which found lack of activity and learning process seemed less maximal for empowerment as its function as a house of learning for communities. This devotion covered four phases of activities, namely: (1) a common approach that takes the form of a preliminary study, (2) determination of the partners and participants of research, (3) the type, data collection procedures, and (4) scale activities. Outputs generated in this devotion are the services, methods, and product
Persistence in the zero-temperature dynamics of the -states Potts model on undirected-directed Barab\'asi-Albert networks and Erd\"os-R\'enyi random graphs
The zero-temperature Glauber dynamics is used to investigate the persistence
probability in the Potts model with , ,..., states on {\it directed} and {\it
undirected} Barab\'asi-Albert networks and Erd\"os-R\'enyi random graphs. In
this model it is found that decays exponentially to zero in short times
for {\it directed} and {\it undirected} Erd\"os-R\'enyi random graphs. For {\it
directed} and {\it undirected} Barab\'asi-Albert networks, in contrast it
decays exponentially to a constant value for long times, i.e, is
different from zero for all values (here studied) from ; this shows "blocking" for all these values. Except that for
in the {\it undirected} case tends exponentially to zero;
this could be just a finite-size effect since in the other "blocking" cases you
may have only a few unchanged spins.Comment: 14 pages, 8 figures for IJM
Probing the ejecta of evolved massive stars in transition: A VLT/SINFONI K-band survey
Massive evolved stars in transition phases, such as Luminous Blue Variables
(LBVs), B[e] Supergiants (B[e]SGs), and Yellow Hypergiants (YHGs), are not well
understood, and yet crucial steps in determining accurate stellar and galactic
evolution models. The circumstellar environments of these stars reveal their
mass-loss history, identifying clues to both their individual evolutionary
status and the connection between objects of different phases. Here we present
a survey of 25 such evolved massive stars (16 B[e]SGs, 6 LBVs, 2 YHGs, and 1
Peculiar Oe star), observed in the K-band with the Spectrograph for INtegral
Field Observation in the Near-Infrared (SINFONI; R = 4500) on the ESO VLT UT4 8
m telescope. The sample can be split into two categories based on spectral
morphology: one group includes all of the B[e]SGs, the Peculiar Oe star, and
two of the LBVs, while the other includes the YHGs and the rest of the LBVs.
The difference in LBV spectral appearance is due to some objects being in a
quiescent phase and some objects being in an active or outburst phase. CO
emission features are found in 13 of our targets, with first time detections
for MWC 137, LHA 120-S 35, and LHA 115-S 65. From model fits to the CO band
heads, the emitting regions appear to be detached from the stellar surface.
Each star with ^12CO features also shows ^13CO emission, signaling an evolved
nature. Based on the level of ^13C enrichment, we conclude that many of the
B[e]SGs are likely in a pre-Red Supergiant phase of their evolution. There
appears to be a lower luminosity limit of log L/L_solar = 5.0 below which CO is
not detected. The lack of CO features in several high luminosity B[e]SGs and
variability in others suggests that they may in fact be LBV candidates,
strengthening the connection between these two very similar transition phases.Comment: 20 pages, 13 figures, 7 tables. Accepted for publication in A&
Validation of Blood Gas Analysis in Arteriovenous Fistula for Hemodialysis
Introduction: Arterial blood gas analysis is a minimally invasive technique used in our daily practice but is not a complication free technique. The aim of this study was to validate results from blood gas analysis obtained from the arteriovenous fistula (AVF)/graft as a surrogate marker of the arterial blood gas analysis.
Methods: A prospective observational study was made in 45 patients. We performed arterial and AVF/graft blood gas analysis and results were compared by a paired sample t Student test.
Results: Most of our subjects was male (68.9%) and the mean age was 67 years (±14). Hemodialysis vintage was 63 months (±66), and vascular access age was 62 months (±56). The more prevalent vascular access was left radiocephalic AVF (n = 16; 35.6%) and the main puncture artery was right radial artery (n = 27; 60.0%). There were no statistically significant differences between the samples collected.
Conclusions: Our results suggest a possible alternative of arterial blood gas analysis in AVF/graft for hemodialysis patients. This could result in making an uncomfortable procedure almost painless and reducing complications. Future research should take place to include anatomical characteristics of the AVF or the circulation of recirculation.info:eu-repo/semantics/publishedVersio
Optical and Near Infrared Study of the Cepheus E outflow, a very low excitation object
We present images and spectra of the Cepheus E (Cep E) region at both optical
and infrared wavelengths. Only the brightest region of the southern lobe of the
Cep E outflow reveals optical emission, suggesting that the extinction close to
the outflow source plays an important r\^ole in the observed difference between
the optical and IR morphologies. Cep E is a unique object since it provides a
link between the spectroscopic properties of the optical Herbig-Haro (HH)
objects and those of deeply embedded outflows.Comment: Accepted Astron. J., 8 files: paper, tables plus 6 figure
Effects of roughing, finishing, and aggressive machining conditions on the milling performance of AISI 1045 steel using TiAlN coated inserts
The objective of the present study is to develop a better understanding of machining performance of TiAlN coated tools
during face milling of AISI 1045 medium carbon steel. The influences of three different cutting conditions (roughing, finishing,
and aggressive conditions) were investigated on cutting forces, chip temperature, tool wear, surface roughness,
and chip characteristics. The highest cutting forces were obtained under roughing condition, while, aggressive mode of
machining (high values of cutting speed, feed, and depth of cuts) resulted in the highest chip temperature, crater, and
flank wear. Material adhesion and coating delamination were predominant under roughing condition. On the other hand,
aggressive condition exhibited diffusion wear causing large depth of crater and severe thermal cracks leading to fracture
of the cutting edge. Attrition and abrasion wear were also evident. The results of cutting forces, chip temperature, surface
roughness, and chip characteristics were correlated with those of tool wear. Results were found to be beneficial in
recommending appropriate criteria for choosing different cutting conditions in face milling of AISI 1045 steel using TiAlN
coated insert.info:eu-repo/semantics/publishedVersio
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