نتایج جستجو برای: rejection coefficient
تعداد نتایج: 203427 فیلتر نتایج به سال:
background: correlations between bone marrow, heart, kidney, liver, skin and lung transplant rejection or survival with human cytokine gene polymorphisms have been described. there are also reports about the role of cytokines and tumor necrosis factors-alpha (tnf-α) on corneal transplant in animal models. further studies are needed to clarify the role of cytokines in corneal allograft rejection...
By adopting the technique of pre-regulator, a high PSRR and low temperature coefficient piecewise-linear bandgap reference (BGR) is designed for analog and mixed-signal application in this paper. The piecewise-linear BGR with pre-regulator, which is analyzed and simulated in SMIC 0.18μm CMOS process, has simple circuit architecture. Simulation results show that piecewise-linear BGR with pre-reg...
A low-power CMOS voltage reference was developed using a 0.35 m standard CMOS process technology. The device consists of MOSFET circuits operated in the subthreshold region and uses no resistors. It generates two voltages having opposite temperature coefficients and adds them to produce an output voltage with a near-zero temperature coefficient. The resulting voltage is equal to the extrapolate...
A piecewise-linear bandagp reference (BGR) with high power supply rejection ratio (PSRR) and low temperature coefficient is designed for analogue and mixed signal systems in this paper. By adopting LDO regulator, the designed high PSRR piecewise-linear BGR achieves well performances and has a simple architecture. Simulation results show that the PSRR of the designed piecewise-linear BGR with LD...
— An extreme low power voltage reference generator operating with a supply voltage ranging from 0.9 to 4 V has been implemented in AMS 0.35 μm CMOS process. The maximum supply current measured at the maximum supply voltage and at 80 °C is 70 nA. A temperature coefficient of 10 ppm/°C is achieved by means of a perfect suppression of the temperature dependence of the mobility, the compensation o...
An extreme low power voltage reference generator operating with a supply voltage ranging from 0.9 to 4 V has been implemented in AMS 0.35m CMOS process. The maximum supply current measured at the maximum supply voltage and at 80 C is 70 nA. A temperature coefficient of 10 ppm C is achieved as the combined effect of 1) a perfect suppression of the temperature dependence of mobility; 2) the compe...
Background and Objectives: Serum amylase increases and its excretion fraction decreases in patients with renal failure. Excretion fraction can be used as a diagnostic way in individuals with acute renal transplant rejection. In this study, the association between amylase excretion fraction and acute renal transplant rejection, was investigated in pediatrics. Methods: in this case - control s...
Dynamic low-coherence interferometry was used to measure Brownian motion of submicrometer particles within highly scattering media. Strong rejection of multiply scattered light was obtained by combination of a coherence gate with a confocal microscope, thus allowing particle characterization methods generally reserved for optically dilute materials to be applied to optically concentrated suspen...
We demonstrate predictable resonance wavelength shifts in silicon micro-resonators by varying their perimeters using high-resolution lithography. The linear coefficient between the resonance wavelength shifts and the perimeter changes is determined with detailed experiments, and found to be nearly constant across the C and L bands in telecommunications. This empirical coefficient is also compar...
BACKGROUND Gene expression profiling test scores have primarily been used to identify heart transplant recipients who have a low probability of rejection at the time of surveillance testing. We hypothesized that the variability of gene expression profiling test scores within a patient may predict risk of future events of allograft dysfunction or death. METHOD Patients from the IMAGE study wit...
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