The ratio of the rate of excretion of urea to the concentration of urea in the plasma, that is, the urea clearance, has been known for many years to increase with the flow of urine (1). The quantative relation between the urea clearance and urine flow has been represented by numerous equations, each adequate for restricted ranges of urine flow. The most common of these equations, in this countr...

Some Experimental Errors in Calculating Regional Cerebral Blood Flow From the Intracarotid Xe Clearance Curve • A digital model study has been developed for quantitative assessment of experimental errors in the analysis of Xe clearance curve from the brain. A small Computer synthesized a model of the clearance curve, varying combinations of fast and slow components. The curves were convoluted w...

Finite field spreading scheme is proposed for a synchronous multiple-access channel with Gaussian noise and equal-power users. For each user, s information bits are spread jointly into a length-sL vector by L multiplications on GF(2s). Thus, each information bit is dispersed into sL transmitted symbols, and the finite field despreading (FF-DES) of each bit can take advantage of sL independent r...

Some Experimental Errors in Calculating Regional Cerebral Blood Flow From the Intracarotid Xe Clearance Curve • A digital model study has been developed for quantitative assessment of experimental errors in the analysis of Xe clearance curve from the brain. A small Computer synthesized a model of the clearance curve, varying combinations of fast and slow components. The curves were convoluted w...

We present near-infrared observations of the proposed counterpart of GRB 000301c. The K’ filter (2.1μm) light curve shows a well-sampled break in the decay slope at t ≈ 3.5 days post-burst. The early time slope is very shallow (∼ −0.1), while the late time slope is steep (−2.2). Comparison with the optical (R band) light curve shows significant differences, especially in the early time decay sl...

finding a minimum allowable radius length of a circle horizontal curve is essential to reduce earthwork cost or damage to the forest ecosystem, as well as make driving more comfortable. the present study is conducted i) to analyze different radius lengths of circle horizontal curves using an integrated approach consists of a civil3d in concert with the field surveys, and ii) to propose a set of...

The UV radiation survival curve of exponentially growing cultures of Escherichia coli B/r WP2 trpE65 was modified by pretreatment for short incubation periods (up to 20 min) with chloramphenicol such that an extended exponential section of intermediate slope appeared between the shoulder and the final exponential slope. Surges of mutation to tryptophan independence occurred with each increase i...

a flow-duration curve (fdc) illustrates the relationship between the frequency and magnitude of streamflow. applications of fdc are of interest for many hydrological problems related to hydropower generation, river and reservoir sedimentation, water quality assessment, water-use assessment, water allocation and habitat suitability. this study was carried out in 11 selected watersheds with commo...

Electrical stimulation of the skin using a needle-electrode specifically activates nociceptive nerve fibres. The detection of such stimuli by subjects depends on the activation of subsequent nociceptive mechanisms. Activation of these mechanisms depends on the temporal stimulus properties, such as the pulse-width, number of pulses, and inter-pulse interval. This different activation of nocicept...