1,507 research outputs found
THE INFLUENCE OF BACKPACK CARRIAGE ON TRUNK POSTURE IN CHILDREN DURING UNPLANNED GAIT TERMINATION
This study aimed to examine the trunk posture in children with different backpack loads during unplanned gait termination. Twelve school boys aged 9–10 years completed unplanned and planned gait termination with a backpack load of 0%, 10%, and 15% of their body weight (BW) while level walking. Trunk inclination angle and trunk range of motion at sagittal plane and spinal angle at frontal plane were examined. In comparison
with 0% BW load condition, the spinal angle increased significantly at 10% and 15% BW load condition during gait termination (
Numerical Analysis of Stress Intensity Factors of a Crack in the Composite Patch Repair
The composite patch repair technology can be utilized to provide upgrades, such as higher design requirements and life extensions. However, in this case, failures easily happen on the edge interface between the substrate material and the restorative material, because of the incompatible of different properties. Failures such as flaws or cracks lying along the interface reduce the strength of the structure significantly. In this paper, the numerical solutions of hypersingular integro-differential equations are discussed in the analysis of three dimensional interfacial cracks subjected to general internal pressure,and the problem is formulated on the basis of the body force method.The stress intensity factors are given with varying material combinations. It is found that the stress intensity factors and are determined by the bi-materials constant alone, independent of elastic modulus ratio and Poisson\u27s ratio.25th International Ocean and Polar Engineering Conference (ISOPE-2015), Kona, Big Island, Hawaii, USA, June 21-26, 201
Tooth-shaped plasmonic waveguide filters with nanometeric sizes
A novel nanometeric plasmonic filter in a tooth-shaped Metal-Insulator-Metal
waveguide is proposed and demonstrated numerically. An analytic model based on
the scattering matrix method is given. The result reveals that the single
tooth-shaped filter has a wavelength filtering characteristic and an
ultra-compact size in the length of a few hundred nanometers, compared to
grating-like SPPs filters. Both analytic and simulation results show that the
wavelength of the trough of the transmission has linear and nonlinear
relationships with the tooth depth and the tooth width, respectively. The
waveguide filter could be utilized to develop ultra-compact photonic filters
for high integration.Comment: 16 pages, 5 figure
4,6-Bis[4-(benzylÂsulfanÂyl)styrÂyl]-2-(methylÂsulfanÂyl)pyrimidine
The title compound, C35H30N2S3, has been synthesized by a solvent-free reaction. The molÂecule exhibits an E,E configuration, the benzene rings and pyrimidine rings being located on the opposite sides of the C=C bonds. The centroid–centroid separation of 3.5808 (17) Å indicates the existence of π–π stacking between nearly parallel pyrimidine and benzene rings of adjacent molÂecules
Expanded CURB-65: A new score system predicts severity of community-acquired pneumonia with superior efficiency
Aim of this study was to develop a new simpler and more effective severity score for communityacquired pneumonia (CAP) patients. A total of 1640 consecutive hospitalized CAP patients in Second
Affiliated Hospital of Zhejiang University were included. The effectiveness of different pneumonia
severity scores to predict mortality was compared, and the performance of the new score was validated
on an external cohort of 1164 patients with pneumonia admitted to a teaching hospital in Italy.
Using age≥ 65 years, LDH>230u/L, albumin<3.5g/dL, platelet count<100×109/L, confusion,
urea>7mmol/L, respiratory rate≥30/min, low blood pressure, we assembled a new severity score
named as expanded-CURB-65. The 30-day mortality and length of stay were increased along with
increased risk score. The AUCs in the prediction of 30-day mortality in the main cohort were 0.826
(95%CI, 0.807–0.844), 0.801 (95%CI, 0.781–0.820), 0.756 (95%CI, 0.735–0.777), 0.793 (95%CI,
0.773–0.813) and 0.759 (95%CI, 0.737–0.779) for the expanded-CURB-65, PSI, CURB-65, SMART-COP
and A-DROP, respectively. The performance of this bedside score was confirmed in CAP patients of
the validation cohort although calibration was not successful in patients with health care-associated
pneumonia (HCAP). The expanded CURB-65 is objective, simpler and more accurate scoring system for
evaluation of CAP severity, and the predictive efficiency was better than other score systems
Experimental test of high-dimensional quantum contextuality based on contextuality concentration
Contextuality is a distinctive feature of quantum theory and a fundamental
resource for quantum computation. However, existing examples of contextuality
in high-dimensional systems lack the necessary robustness required in
experiments. Here we address this problem by identifying a family of
noncontextuality inequalities whose maximum quantum violation grows with the
dimension of the system. At first glance, this contextuality is the
single-system version of an extreme form of multipartite Bell nonlocality. What
is interesting is that the single-system version achieves the same degree of
contextuality but using a Hilbert space of {\em lower} dimension. That is,
contextualize "concentrates" as the degree of contextuality per dimension
increases. We demonstrate the usefulness of this result by showing the
experimental observation of contextuality in a single system of dimension
seven. By simulating sequences of quantum ideal measurements in an all-optical
setup using projective measurements on structured light, we report a violation
of 68.7 standard deviations of the simplest of the noncontextuality
inequalities identified. Our results advance the investigation of
high-dimensional contextuality, its connection to the Clifford algebra, and its
role in quantum computation.Comment: 7+5 pages, 4+2 figures. Comments are welcom
{6,6′-DimethÂoxy-2,2′-[4-bromo-o-phenylÂenebis(nitriloÂmethylÂidyne)]diphenolato}nickel(II) methanol solvate
In the title compound, [Ni(C22H17BrN2O4)]·CH3OH, the NiII ion is in a slightly distorted square-planar geometry involving an N2O2 atom set of the tetraÂdentate Schiff base ligand. The asymmetric unit contains one nickel complex and one methanol solvent molÂecule. The dihedral angle between the aromatic ring planes of the central aromatic ring and other two aromatic rings are 10.8 (3) and 6.0 (2)°. The crystal structure is stabilized by interÂmolecular C—H⋯O and C—H⋯Br and by intraÂmolecular O—H⋯O hydrogen bonds
Limiting Magnitudes of the Wide Field Survey Telescope (WFST)
Expected to be of the highest survey power telescope in the northern
hemisphere, the Wide Field Survey Telescope (WFST) will begin its routine
observations of the northern sky since 2023. WFST will produce a lot of
scientific data to support the researches of time-domain astronomy, asteroids
and the solar system, galaxy formation and cosmology and so on. We estimated
that the 5 limiting magnitudes of WFST with 30 second exposure are
mag, mag, mag, mag, mag,
mag. The above values are calculated for the conditions of
, seeing = 0.75 arcsec, precipitable water vapour (PWV) = 2.5 mm
and Moon-object separation = at the darkest New Moon night of the
Lenghu site (V=22.30 mag, Moon phase ). The limiting
magnitudes in different Moon phase conditions are also calculated. The
calculations are based on the empirical transmittance data of WFST optics, the
vendor provided CCD quantum efficiency, the atmospherical model transmittance
and spectrum of the site. In the absence of measurement data such as sky
transmittance and spectrum, we use model data.Comment: 12 pages, 5 figures, accepted by RAA (Research in Astronomy and
Astrophysics
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