During moderate exercise breathing a low inspired O(2) fraction (F(I)O(2)), arterial O(2) desaturation may depend on the fitness level. Seven trained (TM) and seven untrained men (UTM) cycled in normoxia and in hypoxia (F(I)O(2)=0.187, 0.173, 0.154, 0.13 and 0.117). We compared TM and UTM at submaximal intensities below the ventilatory threshold. Ventilatory variables were monitored and arteria...

DNA looping and aggregation induced by restriction endonuclease BspMI are studied by atomic force microscopy (AFM) and magnetic tweezers (MT). With Ca(2+) substituted for the normal enzyme cofactor Mg(2+) and enzyme concentration below the critical concentration of 6 units/mL, AFM images of DNA-BspMI complex show that the number of binding and looping events increases with enzyme concentration....

this study was conducted to investigate the effects of applying methods andamount of ammonium polyphosphate (0, 2 and 4 wt%) on fire retardancy andmechanical properties of wood flour/polypropylene composites. the resultsshowed that addition of fire retardant improved the mechanical properties such astensile and flexural strengths and fire retardancy of composites. but by increasingof fire retar...

Flash (ultra-rapid) sintering of powder materials is a Multiphysics phenomenon which has potential for the quasi-instantaneous fabrication various components. However, intrinsic instability flash makes it difficult to apply complex shapes and large specimens. Here, we circumvent this problem by use an interface-controlled approach impose stable very fast heating samples become fully dense in ma...

In this paper, a fixed-time distributed cooperative control under actuator faults with input saturation scheme is designed for multiple surface vessels (MSVs). Firstly, disturbance observer (FxDO) introduced to observe unknown environmental disturbances and (AF). Secondly, deal the saturation, an improved nonlinear antiwindup compensator compensate effect of actuator. Thirdly, fault-tolerant ev...

PURPOSE To determine whether radicular enhancement occurs in asymptomatic persons and, if so, to provide insight into the mechanism of such enhancement. METHODS Thirty asymptomatic volunteers were studied with gadolinium-enhanced MR (0.1 mmol/kg) of the lumbar spine. The precontrast axial T1-weighted sequences were reviewed for the entry section phenomenon of flow-related enhancement. If pres...

In this paper we investigate the learning of an unlearnable problem and how this relates to the premature saturation of hidden neu-rons in error backpropagation learning. General aspects of our model are discussed. A sketch of the derivation of equations for the development of the signiicant weights in time is given. 1. Introduction The phenomenon of premature saturation of hidden neurons in fe...

Transport of carriers in two-dimensional graphene at high electric fields is investigated by combining semianalytical and Monte Carlo methods. A semianalytical high-field transport model based on the high rate of optical phonon emission provides useful estimates of the saturation currents in graphene. For developing a more accurate picture, the nonequilibrium (hot) phonon effect and the role of...

OBJECTIVE We have already reported that A1C is elevated because of iron deficiency in late pregnancy among nondiabetic pregnant women. This report examined whether the same phenomenon is observed in pregnant women with diabetes. RESEARCH DESIGN AND METHODS This longitudinal study was conducted in 17 pregnant women with diabetes (20-35 weeks of pregnancy). A1C, serum glycated albumin, erythrocyt...

We consider the production of open charm in heavy ion collisions in the framework of the Color Glass Condensate. In the central rapidity region at RHIC, for the charm quark yield we expect Ncoll (number of collisions) scaling in the absence of final–state effects. At higher energies, or forward rapidities at RHIC, the saturation scale exceeds the charm quark mass; we find that this results in t...