We develop a general method for computing logarithmic and log-gamma expectations of distributions. As a result, we derive series expansions and integral representations of the entropy for several fundamental distributions, including the Poisson, binomial, beta-binomial, and negative binomial distributions. Our results also establish connections between the entropy functions and to the Riemann z...

background : time to donating blood plays a major role in a regular donor to becoming continues one. the aim of this study was to determine the effective factors on the interval between the blood donations. methods : in a longitudinal study in 2008, 864 samples of first-time donors in shahrekord blood transfusion center,  capital city of chaharmahal and bakhtiari province, iran were selected by...

The suitability of 4 theoretical distributions (normal, lognormal, negative binomial, and gamma) to predict the observed distribution of ochratoxin A (OTA) in green coffee was investigated. One symmetrical and 3 positively skewed theoretical distributions were each fitted to 25 empirical distributions of OTA test results for green coffee beans. Parameters of each theoretical distribution were c...

This paper discusses minimum mean-square error quantization for symmetric distributions. If the distribution satisfies a logconcavity condition, the optimal quantizer is itself symmetric. For the gamma distribution often used to model speech signals, the log-concavity condition is not satisfied. It is shown that for this distribution both the uniformly spaced and the nonuniformly spaced optimal...

As a world superpower, the United States has very stable exchange rate and big impact on currencies of other countries, like Indonesia. Probability modeling is therefore essential for analyzing change in rates between Indonesian rupiah (IDR) US dollar (USD). In addition to comparing distributions two parameters, this study also discusses use several mixture 2 3 component distribution probabilit...

The technology of free-space optical communication (FSOC) systems has some distinctive merits compared to other technologies. Its use is extremely beneficial meet the exigencies telecommunications and wireless networks (OTWNs). However, since OTWNs transport a lot data, choice reliable modulation scheme highly crucial. To this end, focus paper an in-depth study Point-to-Point Optical Link (P2P-...