In this paper, we build a novel well-proved model for describing the combined error due to clock jitter and quantization noise on the performance of bandpass sigma delta (Σ∆) analog to digital converters (ADCs). The clock jitter is modeled as a timing variation of the sampling process which follows the characteristic of the Wiener process. Computer simulations as well as theoretical calculation...

Coordinated observations of the galactic center region using the imaging SIGMA instrument and the high-sensitivity OSSE instrument were performed to separate the compact source contributions from the di use component. The resulting compact-source corrected spectrum of the galactic center region is found to be similar in both intensity and spectral index to the spectra obtained from OSSE observa...

By evaluating "user satisfaction index" for provided services, libraries are now collecting data which can be a basis for library management. This promotes research on reasonable and efficient evaluation tools for "user satisfaction" and "performance measurement." LibQUAL+ usage is currently increasing, which can be found in many documents. This study set out to draw and implement scientific an...

| The nonlinear recursive di erence equations of second order bandpass Delta-Sigma modulator with sinusoidal inputs are solved. The results indicate that quantization error is neither uniformly distributed nor white. The autocorrelation of quantization error is symmetric but does not vanish as correlation index increased. The study of crosscorrelation between quantization error and sinusoidal i...

By a quantitative Western immunoblot analysis, the intracellular levels of two principal sigma subunits, sigma 70 (sigma D, the rpoD gene product) and sigma 38 (sigma S, the rpoS gene product), and of two minor sigma subunits, sigma 54 (sigma N, the rpoN gene product) and sigma 28 (sigma F, the rpoF gene product), were determined in two Escherichia coli strains, W3110 and MC4100. The results in...

Thirteen newly isolated monoclonal antibodies (MAbs) were used to study relationships between reovirus outer capsid proteins sigma 3, mu 1c, and lambda 2 (core spike) and the cell attachment protein sigma 1. We focused on sigma 1-associated properties of serotype specificity and hemagglutination (HA). Competition between MAbs revealed two surface epitopes on mu 1c that were highly conserved bet...