6,797 research outputs found
Electron-Hole Asymmetry in the Electron-phonon Coupling in Top-gated Phosphorene Transistor
Using in-situ Raman scattering from phosphorene channel in an
electrochemically top-gated field effect transistor, we show that its phonons
with A symmetry depend much more strongly on concentration of electrons
than that of holes, while the phonons with B symmetry are insensitive to
doping. With first-principles theoretical analysis, we show that the observed
electon-hole asymmetry arises from the radically different constitution of its
conduction and valence bands involving and bonding states
respectively, whose symmetry permits coupling with only the phonons that
preserve the lattice symmetry. Thus, Raman spectroscopy is a non-invasive tool
for measuring electron concentration in phosphorene-based nanoelectronic
devices
An empirical analysis of market discipline imposed by stakeholders in the Indonesian banking sector
Financial sector authorities have incorporated market discipline as an integral part of their banking regulatory frameworks. Accordingly, in Indonesia, the Basel II Capital Accord has institutionalized the market discipline as Pillar 3 to complement requirements under Pillar 1 (risk-based calculation of capital) and Pillar 2 (supervisory review process). In addition, the provision of a financial safety net (FSN) has been a key element of the policy response to recent financial crises. This provision, however, might potentially lead to moral hazard outcomes that could impair the incentives for market players to monitor and discipline financial institutions. In turn, this could incite more risky bank activities and increase the likelihood of a financial crisis. Therefore, a further investigation of the presence of market discipline and the impact of a FSN is imperative to develop a more credible policy to safeguard financial system stability, especially in developing economies such as Indonesia.
This study investigates the presence of market discipline in the Indonesian banking sector as imposed by depositors, bond holders, and equity holders. The discipline by depositors is measured through the impact of bank fundamentals on the changes in the amount of deposits. Whereas, discipline by bond and equity holders is measured through the impact of bank fundamentals on bond yield spreads and equity returns, respectively. Bank fundamentals, in this study, are associated with the Capital Asset Management Earning and Liquidity (CAMEL) financial indicators that are commonly used by banking authorities to assess bank soundness. This study employs a dynamic panel data model using a sample of 95 banks, 70 bonds, and 11 equities.
Regardless of the lack of ideal conditions for an effective market discipline in a developing market, the present study has identified the presence of market discipline imposed by depositors and bond holders, but no significant evidence of discipline by equity holders. Moreover, this study identified moral hazard implications of the provision of a FSN. These include the lessening of discipline by large and institutional depositors and the existence of the “too big to fail” (TBTF) perception among stakeholders
Attitude towards diabetes and social and family support among type 2 diabetes patients attending a tertiary-care hospital in Bangladesh: a cross-sectional study
Background: Bangladesh has been suffering from an epidemiological transition from infectious and maternal diseases to non-communicable lifestyle-related diseases like diabetes, cardiovascular diseases, cancers etc. The burden of diabetes has been increasing rapidly due to high incidence as well as poor glycemic control leading to various macro and micro-vascular complications. In this study, we aim to assess the attitude towards diabetes and social and family support among the Bangladeshi type 2 diabetic mellitus (T2DM) patients. Methods: This was a cross-sectional study among 144 patients with T2DM at the medicine outpatient department of Dhaka Medical College Hospital (DMCH) in Dhaka, Bangladesh between 1 July and 31 July 2014. Data collection was done by interviewing patients using structured questionnaire. Understanding diabetes, education/advice received, attitude towards diabetes, family and friend support were measured by validated scales adapted from diabetes care profile. Results: This study includes a total of 144 patients (101 males and 43 females) with type 2 diabetes aged between 20 and 84 years. 87 % of the patients had inadequate blood glucose control (fasting blood sugar >7.2 mmol/L or >130 mg/dl). Statistically significant differences were observed in the mean scores of various attitude scales (i.e. positive, negative, care ability and self-care adherence scale) among patients with adequate and inadequate blood glucose control (p < 0.05). Statistically significant positive correlations were found between these three categories of social and family support. Self-satisfaction with diabetic care was significantly associated with adequate blood glucose control (p = 0.05). Conclusions: Positive attitude towards diabetes management and support from friends and family were associated with adequate diabetes management. Appropriate public health interventions should be designed to educate and motivate the family members to offer greater support to the diabetes patients
Black Hole Thermodynamics: Entropy, Information and Beyond
We review some recent advances in black hole thermodynamics, including
statistical mechanical origins of black hole entropy and its leading order
corrections, from the viewpoints of various quantum gravity theories. We then
examine the information loss problem and some possible approaches to its
resolution. Finally, we study some proposed experiments which may be able to
provide experimental signatures of black holes.Comment: Plenary talk given at the Fifth International Conference on
Gravitation and Cosmology, Cochin, 7 January 2004. 13 pages, Revte
X-ray Raman scattering study of aligned polyfluorene
We present a non-resonant inelastic x-ray scattering study at the carbon
K-edge on aligned poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl] and show that
the x-ray Raman scattering technique can be used as a practical alternative to
x-ray absorption measurements. We demonstrate that this novel method can be
applied to studies on aligned -conjugated polymers complementing
diffraction and optical studies. Combining the experimental data and a very
recently proposed theoretical scheme we demonstrate a unique property of x-ray
Raman scattering by performing the symmetry decomposition on the density of
unoccupied electronic states into - and -type symmetry contributions.Comment: 19 pages, 8 figure
Neutrino Phenomenology, Dark Energy and Leptogenesis from pseudo-Nambu-Goldstone Bosons
We consider a model of dynamical neutrino masses via the see-saw mechanism.
Nambu-Goldstone bosons (majorons) arise associated with the formation of the
heavy right-handed majorana masses. These bosons then acquire naturally soft
masses (become pNGB's) at loop level via the Higgs-Yukawa mass terms. These
models, like the original neutrino pNGB quintessence schemes of the 1980's that
proceed through the Dirac masses, are natural, have cosmological implications
through mass varying neutrinos, long range forces, and provide a soft potential
for dark energy. We further argue that these models can explain leptogenesis
naturally through the decays of the right-handed neutrinos.Comment: 15 pages, 2 figure
Glassy Phase Transition and Stability in Black Holes
Black hole thermodynamics, confined to the semi-classical regime, cannot
address the thermodynamic stability of a black hole in flat space. Here we show
that inclusion of correction beyond the semi-classical approximation makes a
black hole thermodynamically stable. This stability is reached through a phase
transition. By using Ehrenfest's scheme we further prove that this is a glassy
phase transition with a Prigogine-Defay ratio close to 3. This value is well
placed within the desired bound (2 to 5) for a glassy phase transition. Thus
our analysis indicates a very close connection between the phase transition
phenomena of a black hole and glass forming systems. Finally, we discuss the
robustness of our results by considering different normalisations for the
correction term.Comment: v3, minor changes over v2, references added, LaTeX-2e, 18 pages, 3 ps
figures, to appear in Eour. Phys. Jour.
Basic kinetic wealth-exchange models: common features and open problems
We review the basic kinetic wealth-exchange models of Angle [J. Angle, Social
Forces 65 (1986) 293; J. Math. Sociol. 26 (2002) 217], Bennati [E. Bennati,
Rivista Internazionale di Scienze Economiche e Commerciali 35 (1988) 735],
Chakraborti and Chakrabarti [A. Chakraborti, B. K. Chakrabarti, Eur. Phys. J. B
17 (2000) 167], and of Dragulescu and Yakovenko [A. Dragulescu, V. M.
Yakovenko, Eur. Phys. J. B 17 (2000) 723]. Analytical fitting forms for the
equilibrium wealth distributions are proposed. The influence of heterogeneity
is investigated, the appearance of the fat tail in the wealth distribution and
the relaxation to equilibrium are discussed. A unified reformulation of the
models considered is suggested.Comment: Updated version; 9 pages, 5 figures, 2 table
Performance of Indian Manufacturing in the Post Reform Period
Many emerging countries in recent decades have relied on a development strategy that focused primarily on promoting the manufacturing sector and the exports of manufactured goods. However, an acceleration of growth of output and employment in manufacturing has eluded India. This is despite the fact that the central focus of the reforms in the 1980s and 1990s was to unshackle the manufacturing sector. Instead it is the services sector which has grown rapidly, contributing about two-third of GDP growth in recent years. This paper discusses the reasons behind the modest performance of the manufacturing sector in India post reforms. It argues that there are many factors that have inhibited the growth of industrial sector in India. One major factor is the rigid and strict labor laws which have affected the industrial performance in a number of ways, by keeping the size of the establishments small, by not encouraging the production of labor intensive goods, by pushing activities to the unorganized sector, and by keeping the Indian industry uncompetitive. Besides the labor laws other factors that are responsible for the modest performance of the manufacturing sector include difficulty in the acquisition of land for industrial use, inadequate financing and infrastructure, and cumbersome business climate. The paper presents arguments and evidence which shows the importance of these factors
Measurement of pion, kaon and proton production in proton-proton collisions at TeV
The measurement of primary , K, p and
production at mid-rapidity ( 0.5) in proton-proton collisions at
TeV performed with ALICE (A Large Ion Collider Experiment) at
the Large Hadron Collider (LHC) is reported. Particle identification is
performed using the specific ionization energy loss and time-of-flight
information, the ring-imaging Cherenkov technique and the kink-topology
identification of weak decays of charged kaons. Transverse momentum spectra are
measured from 0.1 up to 3 GeV/ for pions, from 0.2 up to 6 GeV/ for kaons
and from 0.3 up to 6 GeV/ for protons. The measured spectra and particle
ratios are compared with QCD-inspired models, tuned to reproduce also the
earlier measurements performed at the LHC. Furthermore, the integrated particle
yields and ratios as well as the average transverse momenta are compared with
results at lower collision energies.Comment: 33 pages, 19 captioned figures, 3 tables, authors from page 28,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/156
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