2,175 research outputs found
Analisis Kesiapan Sumber Daya Manusia Pada Kontraktor Di Surabaya Menghadapi Masyarakat Ekonomi ASEAN
Penelitian ini dilakukan untuk mengetahui kesiapan sumber daya manusia pada kontraktor di Surabaya dalam menghadapi Masyarakat Ekonomi ASEAN (MEA), terutama para tenaga kerja yang berada di Surabaya. Ketersediaan jumlah sumber daya manusia yang cukup banyak di Indonesia membuat aspek tersebut merupakan salah satu bagian yang perlu diperhatikan dalam menghadapi MEA. Dengan berlangsungnya MEA di negara-negara ASEAN maka aliran bebas tenaga kerja antar negara ASEAN akan semakin mudah dikarenakan dibebaskannya biaya pembuatan visa dan employment pass. Akibatnya, hal tersebut dapat memunculkan persaingan antara tenaga kerja lokal dengan tenaga kerja asing untuk mendapatkan lapangan pekerjaan di Indonesia.Hasil penelitian menunjukkan bahwa 75% tenaga kerja belum siap secara administratif untuk menghadapi MEA yang akan berlaku mulai pada akhir tahun 2015 ini. Ketidaksiapan tersebut berupa ketidaklulusan syarat untuk mendaftar sebagai anggota ASEAN Chartered Professional Engineer (ACPE) sesuai dengan MRA on Engineering Services. Selain itu unit kompetensi yang perlu ditingkatkan bagi para tenaga kerja kontraktor di Surabaya adalah Manajemen Keselamatan Kesehatan Kerja dan Manajemen Lingkungan
Search for Sterile Neutrinos with a Radioactive Source at Daya Bay
The far site detector complex of the Daya Bay reactor experiment is proposed
as a location to search for sterile neutrinos with > eV mass. Antineutrinos
from a 500 kCi 144Ce-144Pr beta-decay source (DeltaQ=2.996 MeV) would be
detected by four identical 20-ton antineutrino targets. The site layout allows
flexible source placement; several specific source locations are discussed. In
one year, the 3+1 sterile neutrino hypothesis can be tested at essentially the
full suggested range of the parameters Delta m^2_{new} and sin^22theta_{new}
(90% C.L.). The backgrounds from six nuclear reactors at >1.6 km distance are
shown to be manageable. Advantages of performing the experiment at the Daya Bay
far site are described
Two-Dimensional Spectroscopy of Extended Molecular Systems: Applications to Energy Transport and Relaxation in an α-Helix
A simulation study of the coupled dynamics of amide I and amide II vibrations in an α-helix dissolved in water shows that two-dimensional (2D) infrared spectroscopy may be used to disentangle the energy transport along the helix through each of these modes from the energy relaxation between them. Time scales for both types of processes are obtained. Using polarization-dependent 2D spectroscopy is an important ingredient in the method we propose. The method may also be applied to other two-band systems, both in the infrared (collective vibrations) and the visible (excitons) parts of the spectrum.
Neutral Higgs bosons in the MNMSSM with explicit CP violation
Within the framework of the minimal non-minimal supersymmetric standard model
(MNMSSM) with tadpole terms, CP violation effects in the Higgs sector are
investigated at the one-loop level, where the radiative corrections from the
loops of the quark and squarks of the third generation are taken into account.
Assuming that the squark masses are not degenerate, the radiative corrections
due to the stop and sbottom quarks give rise to CP phases, which trigger the CP
violation explicitly in the Higgs sector of the MNMSSM. The masses, the
branching ratios for dominant decay channels, and the total decay widths of the
five neutral Higgs bosons in the MNMSSM are calculated in the presence of the
explicit CP violation. The dependence of these quantities on the CP phases is
quite recognizable, for given parameter values.Comment: 25 pages, 8 figure
Not Just Fun and Games: A Review of College Drinking Games Research From 2004 to 2013
Drinking games are a high-risk social drinking activity consisting of rules and guidelines that determine when and how much to drink (Polizzotto et al., 2007). Borsari\u27s (2004) seminal review paper on drinking games in the college environment succinctly captured the published literature as of February 2004. However, research on college drinking games has grown exponentially during the last decade, necessitating an updated review of the literature. This review provides an in-depth summary and synthesis of current drinking games research (e.g., characteristics of drinking games, and behavioral, demographic, social, and psychological influences on participation) and suggests several promising areas for future drinking games research. This review is intended to foster a better understanding of drinking game behaviors among college students and improve efforts to reduce the negative impact of this practice on college campuses
Trim17, novel E3 ubiquitin-ligase, initiates neuronal apoptosis
Accumulating data indicate that the ubiquitin-proteasome system controls apoptosis by regulating the level and the function of key regulatory proteins. In this study, we identified Trim17, a member of the TRIM/RBCC protein family, as one of the critical E3 ubiquitin ligases involved in the control of neuronal apoptosis upstream of mitochondria. We show that expression of Trim17 is increased both at the mRNA and protein level in several in vitro models of transcription-dependent neuronal apoptosis. Expression of Trim17 is controlled by the PI3K/Akt/GSK3 pathway in cerebellar granule neurons (CGN). Moreover, the Trim17 protein is expressed in vivo, in apoptotic neurons that naturally die during post-natal cerebellar development. Overexpression of active Trim17 in primary CGN was sufficient to induce the intrinsic pathway of apoptosis in survival conditions. This pro-apoptotic effect was abolished in Bax(-/-) neurons and depended on the E3 activity of Trim17 conferred by its RING domain. Furthermore, knock-down of endogenous Trim17 and overexpression of dominant-negative mutants of Trim17 blocked trophic factor withdrawal-induced apoptosis both in CGN and in sympathetic neurons. Collectively, our data are the first to assign a cellular function to Trim17 by showing that its E3 activity is both necessary and sufficient for the initiation of neuronal apoptosis. Cell Death and Differentiation (2010) 17, 1928-1941; doi: 10.1038/cdd.2010.73; published online 18 June 201
Experimental manifestations of the Nb^{4+}-O^{-} polaronic excitons in KTa_{0.988}Nb_{0.012}O_{3}
The formation of the photo-polaronic excitons in ABO_{3} perovskite type
oxides has been detected experimentally by means of the photoinduced electron
paramagnetic resonance studies of KTa_{0.998}Nb_{0.012}O_{3} crystals. The
corresponding microwave X-band spectrum at T < 10 K consists of a narrow,
nearly isotropic signal located at g ~ 2 and a strongly anisotropic component.
The first signal, which has a rich structure due to hyperfine interactions with
the lattice nuclei, is attributed to the single trapped charge carriers: the
electrons and/or the holes. The anisotropic spectrum is caused by the axial
centers oriented along the C_{4} pseudo-cubic principal crystalline axes. The
spectrum angular dependence can be described well by an axial center with S =
1, g_{\parallel) = 0.82, g_{\perp} = 0.52 and D = 0.44 cm^{-1}. The anisotropic
spectrum is attributed to the Nb^{4+}-O^{-} polaronic excitons. The temperature
dependence of the anisotropic component is characterized by two activation
energies: the internal dynamics activation E_{a1} = 3.7\pm0.5 meV, which makes
the EPR spectrum unobservable above 10 K, and the destruction energy E_{a2} =
52\pm4 meV. By comparing the anisotropic photo-EPR spectrum and the
photoinduced optical absorption temperature dependencies, we found that the
Nb^{4+}-O^{-} polaronic excitons also manifested themselves via the ~0.7 eV
wide absorption band arising under UV light excitation in the weakly
concentrated KTaO_{3}:Nb crystals.Comment: PDF, 15 pages, 6 figures (submitted to Physical review B
Narrowing of EIT resonance in a Doppler Broadened Medium
We derive an analytic expression for the linewidth of EIT resonance in a
Doppler broadened system. It is shown here that for relatively low intensity of
the driving field the EIT linewidth is proportional to the square root of
intensity and is independent of the Doppler width, similar to the laser induced
line narrowing effect by Feld and Javan. In the limit of high intensity we
recover the usual power broadening case where EIT linewidth is proportional to
the intensity and inversely proportional to the Doppler width.Comment: 4 pages, 2 figure
TGF-b2 induction regulates invasiveness of theileria-transformed leukocytes and disease susceptibility
Theileria parasites invade and transform bovine leukocytes causing either East Coast fever (T. parva), or tropical theileriosis (T. annulata). Susceptible animals usually die within weeks of infection, but indigenous infected cattle show markedly reduced pathology, suggesting that host genetic factors may cause disease susceptibility. Attenuated live vaccines are widely used to control tropical theileriosis and attenuation is associated with reduced invasiveness of infected macrophages in vitro. Disease pathogenesis is therefore linked to aggressive invasiveness, rather than uncontrolled proliferation of Theileria-infected leukocytes. We show that the invasive potential of Theileria-transformed leukocytes involves TGF-b signalling. Attenuated live vaccine lines express reduced TGF-b2 and their invasiveness can be rescued with exogenous TGF-b. Importantly, infected macrophages from disease susceptible Holstein-Friesian (HF) cows express more TGF-b2 and traverse Matrigel with great efficiency compared to those from disease-resistant Sahiwal cattle. Thus, TGF-b2 levels correlate with disease susceptibility. Using fluorescence and time-lapse video microscopy we show that Theileria-infected, disease-susceptible HF macrophages exhibit increased actin dynamics in their lamellipodia and podosomal adhesion structures and develop more membrane blebs. TGF-b2-associated invasiveness in HF macrophages has a transcription-independent element that relies on cytoskeleton remodelling via activation of Rho kinase (ROCK). We propose that a TGF-b autocrine loop confers an amoeboid-like motility on Theileria-infected leukocytes, which combines with MMP-dependent motility to drive invasiveness and virulence
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