5,916 research outputs found
Effect of pyridoxine treatment of a homocystinuric patient on the urinary excretion of some sulfur-containing amino acids
The effect of pyridoxine treatment of a homocystinuric
patient on the urinary excretion of some sulfur-containing amino acids was studied and the following results were obtained. As a result of pyridoxine treatment, urinary homocystine decreased to a fairly great extent, and its unusual metabolites S.(3-hydroxy-3-carboxyn- propylthio) homocysteine (HCPTHC) and S-C8-carboxyethylthio homocysteine (j3-CETHC) increased to some extent. But its oxidation product (homocysteic acid) showed a tendency to decrease slightly. Urinary methionine and cystine increased to some extent, but cysteinehomocysteine mixed disulfide showed no remarkable change.</p
Biomechanical Analysis of Body Movement During Skiing Over Bumps
Maintenance of balance of the skier's body is one of the most important and basic techniques in skiing on slopes of various conditions. However, skiers, especially beginners are likely to lose their balance on an uneven terrain with dips and swells. In order to keep his balance during skiing on an uneven terrain, it seems to be important for a skier to avoid receiving impulse from the snow surface.
Some investigations have been conducted about maintenance of balance of body during skiing over artificially constructed bumps by means of electromyography (Miyashita and Sakurai, 1979), electrogoniometry
(Iizuka and Miyashita, 1979) and cinematography (Miyashita and Sakurai, 1979, Iizuka and Miyashita, 1979, Sodeyama et al., 1979 and Ikegami et al. 1985). However, there is no research to try to measure force or acceleration acting on the skier's body during running over bumps.
Therefore the purpose of this study is to measure force acting on skier's body by analyzing the movement of skier's body mechanically as well as kinematically, and to find out essential motions to maintain the balance of skier's body against rapid change of force acting from snow surface while skiing over bumps on a straight downhill run
Antenatal infection/inflammation and postnatal lung maturation and injury
Chorioamnionitis is frequently associated with preterm deliveries before 30 weeks gestation. Chorioamnionitis correlates both with an increased risk of bronchopulmonary dysplasia and with a decreased risk of respiratory distress syndrome. Both interleukin-1α and endotoxin can induce inflammation in the fetal lungs and lung maturation after preterm birth when given by intra-amniotic injection. Inflammation can also result in an arrest of alveolarization, and this lung developmental abnormality is prominent in the lungs of preterm infants that die of bronchopulmonary dysplasia. The mechanisms by which infection/inflammation can have both beneficial and injurious effects on the preterm lung remain to be characterized
A NEW VALID SHOCK ABSORBENCY TEST FOR THIRD GENERATION ARTIFICIAL TURF
This study aims to re-examine how much the current mechanical testing procedure is valid to evaluate the shock absorbency of third generation artificial turf (3-g turf) and to establish a new testing procedure which precisely reflects the acute load by human sports action. The standard DIN test was conducted for the 3-g turfs with different infill rubber size and the number of layers. The baseline of the load of acute sports action was obtained from the ground reaction force of landing of 50 cm height with minimal shock attenuation. For reproducing the force similar to such hard landing, a testing rig was developed and several types of the 3-g turf with different infill and depth: sand 40 mm, rubber 40 mm, rubber 15 mm and sand/rubber 40 mm were tested. The standard test was found to be inappropriate to evaluate the shock absorbency of the 3-g turf, in particular for likely acute, high loading by human sports action. In contrast, the newly developed testing rig succeeded in illustrating the differences of shock attenuation properties between the 3-g turfs. The need of replicate high loading test using an alternative testing procedure was highlighted
Electronic structure of periodic curved surfaces -- continuous surface versus graphitic sponge
We investigate the band structure of electrons bound on periodic curved
surfaces. We have formulated Schr\"{o}dinger's equation with the Weierstrass
representation when the surface is minimal, which is numerically solved. Bands
and the Bloch wavefunctions are basically determined by the way in which the
``pipes'' are connected into a network, where the Bonnet(conformal)-transformed
surfaces have related electronic strucutres. We then examine, as a realisation
of periodic surfaces, the tight-binding model for atomic networks
(``sponges''), where the low-energy spectrum coincides with those for
continuous curved surfaces.Comment: 4 page
Electronic structure of periodic curved surfaces -- topological band structure
Electronic band structure for electrons bound on periodic minimal surfaces is
differential-geometrically formulated and numerically calculated. We focus on
minimal surfaces because they are not only mathematically elegant (with the
surface characterized completely in terms of "navels") but represent the
topology of real systems such as zeolites and negative-curvature fullerene. The
band structure turns out to be primarily determined by the topology of the
surface, i.e., how the wavefunction interferes on a multiply-connected surface,
so that the bands are little affected by the way in which we confine the
electrons on the surface (thin-slab limit or zero thickness from the outset).
Another curiosity is that different minimal surfaces connected by the Bonnet
transformation (such as Schwarz's P- and D-surfaces) possess one-to-one
correspondence in their band energies at Brillouin zone boundaries.Comment: 6 pages, 8 figures, eps files will be sent on request to
[email protected]
Real time Power Capping with Smart Circuit Breaker to maximize Power Utilization of Local Generator
Effective energy management and control is an
important and urgent issue in the emerging and developing
countries, so as to achieve their sustainable growth, because of
poor quality of power supply by their electric power companies.
In order to come up with the frequent electric power outage
by the power company, most of buildings in developing and
emerging countries install a power generator. Although because of
poor control system in the premises, utilization factor of output
capability of power generators is typically low except at peak
periods. To improve the utilization factor of power generator,
we propose a system, which can manage power segments in the
building using SCB (Smart Circuit Breaker). SCBs are connected
by wireless technologies with battery backup, and set their power
capping based on the indication issued by central manager. The
central manager computes power capping threshold of each SCB
using the proposed algorithm, in real-time fashion. Experimental
results show that the proposed algorithm can optimize the
required capacity of the local power generator and that we need
a feedback-looped adaptive threshold calculation algorithm
Search for Short-Lived Neutron-Rich Nuclei Produced by Charged-Particle- Induced Fission of 238U with IGISOL
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