1,095 research outputs found
Electrical technology students in vocational colleges: are they healthy mentally?
Distraction such as depression, anxiety, and stress in mental health problem can influence academic achievement to students, including vocational colleges’ students. Hence, the main purpose of this study was to determine the mental health profiles of Electrical Course students in Vocational Colleges. The difference in mental health level in terms of gender, hometown, and years of study were also be investigated. Besides, the level of mental health elements implementation by teachers in teaching and learning was also determined. This study was employed a survey method as research design that involved of 132 respondents from three vocational colleges in the southern zone. The respondents were selected using strata sampling technique. The instrument of this study was Malay version DASS-21 item inventory. This inventory measures three elements of mental health problem, namely depression, anxiety, and stress through 21 items. Questionnaires for level of mental health elements implementation by teachers in teaching and learning from student perception consists of 21 items. The collected data were analyzed using frequency, percentage, Spearman Rho test, Mann Whitney U test, and Kruskal Wallis test. The findings of this study showed that students' mental health level and the level of mental health elements implementation by teachers in teaching and learning were at the moderate level. The findings also found that there was a significant relationship between each element of mental health with students’ academic achievement level, as well as the level of mental health elements implementation by teachers in teaching and learning. In addition, the results also shows that there were no significant difference in the mental health level among the students from the aspects of gender, hometown, and years of study. In short, an intervention program needs to be implemented to overwhelm students’ mental health problems, because prevention was better than cure
Optical Absorption Enhancement by Mechanical Twins Grown Using Low Temperature Silicon Epitaxy
AbstractThis paper presents the results of thin film silicon (Si) solar cells with in-situ doped epitaxial emitter deposited on Si substrate by rapid thermal chemical vapor deposition (CVD). High resolution transmission electron microscopy (HRTEM) images reveal that low temperature Si epitaxy growth induces mechanical twins at the junction interface. The presence of the twins alters the orientation of the crystal planes, increases the optical path length of light within the epitaxy film and improves the optical absorption. On the other hand, these twins appear to be the main cause for material-induced shunting at the p-n junction. Photoluminescence (PL) mapping indicate that lower growth temperature results in better interface quality
Socioeconomic determinants of multimorbidity: a population-based household survey of Hong Kong Chinese
<b>Introduction</b> Multimorbidity has been well researched in terms of consequences and healthcare implications. Nevertheless, its risk factors and determinants, especially in the Asian context, remain understudied. We tested the hypothesis of a negative relationship between socioeconomic status and multimorbidity, with contextually different patterns from those observed in the West.<p></p>
<b>Methods</b> We conducted our study in the general Hong Kong (HK) population. Data on current health conditions, health behaviours, socio-demographic and socioeconomic characteristics was obtained from HK Government’s Thematic Household Survey. 25,780 individuals aged 15 or above were sampled. Binary logistic and negative binomial regression analyses were conducted to identify risk factors for presence of multimorbidity and number of chronic conditions, respectively. Sub-analysis of possible mediation effect through financial burden borne by private housing residents on multimorbidity was also conducted.<p></p>
<b>Results</b> Unadjusted and adjusted models showed that being female, being 25 years or above, having an education level of primary schooling or below, having less than HK$15,000 monthly household income, being jobless or retired, and being past daily smoker were significant risk factors for the presence of multimorbidity and increased number of chronic diseases. Living in private housing was significantly associated with higher chance of multimorbidity and increased number of chronic diseases only after adjustments.<p></p>
<b>Conclusions</b>Less advantaged people tend to have higher risks of multimorbidity and utilize healthcare from the public sector with poorer primary healthcare experience. Moreover, middle-class people who are not eligible for government subsidized public housing may be of higher risk of multimorbidity due to psychosocial stress from paying for the severely unaffordable private housing
Large Hadroproduction of as a Probe of Gluon Distribution inside Proton
The transverse momentum distribution of single vector boson production at
hadron colliders provides useful ways of testing the Standard Model and
searching new physics beyond the Standard Model. We study large
hadroproduction of -boson as a probe of gluon distributions inside proton.
We investigate how to get initial gluon-involving contributions, or how to
subtract quark-quark (or -antiquark) contributions from total cross section. We
also investigated the simultaneous measurement of the rapidity and the
transverse momentum of the produced boson, to obtain momentum fractions of
initial partons. And we extracted relevant uncertainties involving in
experimental and theoretical analyses. This large hadroproduction of
can be used as constraints on analyses of global parton (gluon and quarks)
distribution functions inside proton.Comment: (a) 13 pages(LaTeX) + 1 figure ps file(3 pages):compressed, uuencoded
(b) accepted by Phys.Lett.B. (c) some figures are combined and one is
omitted. (d) conclusion part is included into abstrac
Scanning electrochemical cell microscopy : a versatile technique for nanoscale electrochemistry and functional imaging
Scanning electrochemical cell microscopy (SECCM) is a new pipette-based imaging technique purposely designed to allow simultaneous electrochemical, conductance, and topographical visualization of surfaces and interfaces. SECCM uses a tiny meniscus or droplet, confined between the probe and the surface, for high-resolution functional imaging and nanoscale electrochemical measurements. Here we introduce this technique and provide an overview of its principles, instrumentation, and theory. We discuss the power of SECCM in resolving complex structure-activity problems and provide considerable new information on electrode processes by referring to key example systems, including graphene, graphite, carbon nanotubes, nanoparticles, and conducting diamond. The many longstanding questions that SECCM has been able to answer during its short existence demonstrate its potential to become a major technique in electrochemistry and interfacial science
The flux pinning force and vortex phase diagram of single crystal FeTe0.60Se0.40
The flux pinning force density (Fp) of the single crystalline FeTe0.60Se0.40
superconductor has been calculated from the magnetization measurements. The
normalized Fp versus h (=H/Hirr) curves are scaled using the Dew-Hughes formula
to underline the pinning mechanism in the compound. The obtained values of
pinning parameters p and q indicate the vortex pinning by the mixing of the
surface and the point core pinning of the normal centers. The vortex phase
diagram has also been drawn for the first time for the FeTe0.60Se0.40, which
has very high values of critical current density Jc ~ 1.10(5) Amp/cm2 and the
upper critical field Hc2(0) = 65T, with a reasonably high transition
temperature Tc =14.5K.Comment: 12 pages, 4 figure
Virtual SUSY Threshold Effects and CDF large Anomaly
Recent CDF data of the inclusive jet cross section shows threshold-like
structured deviation, around transverse momentum
GeV. If this data is real, not just some statistical fluctuation, is it
possible to interpret the anomaly in terms of virtual SUSY effects? The purpose
of this note is to address this question. However, we find that virtual SUSY
loop interference effects [near the threshold] are too small to explain the CDF
data. Our main conclusion seems to be on the right track if we assume that the
recent global analysis of improved parton distributions by Lai et al. is
correct. PACS number(s): 14.65.Ha, 12.38.Bx, 12.60.Jv, 13.85.-tComment: 10 pages, RevTex, 1 Tex file and 5-page postscript together, To
appear in Phys.Lett.
Validity of numerical trajectories in the synchronization transition of complex systems
We investigate the relationship between the loss of synchronization and the
onset of shadowing breakdown {\it via} unstable dimension variability in
complex systems. In the neighborhood of the critical transition to strongly
non-hyperbolic behavior, the system undergoes on-off intermittency with respect
to the synchronization state. There are potentially severe consequences of
these facts on the validity of the computer-generated trajectories obtained
from dynamical systems whose synchronization manifolds share the same
non-hyperbolic properties.Comment: 4 pages, 4 figure
Loop effects and non-decoupling property of SUSY QCD in
One-loop SUSY QCD radiative correction to cross section is
calculated in the Minimal Supersymmetric Standard Model. We found that SUSY QCD
is non-decoupling if the gluino mass and the parameter , or
are at the same order and get large. The non-decoupling contribution can be
enhanced by large and therefore large corrections to the hadronic
production rates at the Tevatron and LHC are expected in the large
limit. The fundamental reason for such non-decoupling behavior is found to be
some couplings in the loops being proportional to SUSY mass parameters.Comment: 15 pages, 5 PS figures. A proof of non-decouplings of SUSY-QCD,
Comments on corresponding QCD correction and references adde
A small open economy New Keynesian model for a foreign exchange constrained economy
Firms in many low income countries depend entirely on imported capital and intermediate inputs. As a result, in these countries economic activity is considerably influenced by the capacity of the economy to import these inputs which, in turn, depends on the availability
and cost of foreign exchange. In this study we introduce foreign exchange availability as an additional constraint faced by firms into an otherwise standard small open economy New Keynesian DSGE model. The model is then calibrated for a typical Sub Saharan African economy and the behaviour of the model in response to both domestic and external shocks is compared with the standard model. The impulse responses of the two models show that the modified model generates more variability in most of the variables considered than the standard model. This behaviour of the modified model seems to correspond to the stylized
facts of low income countries
- …