The aim of this study is to optimize performance functions of turbofan engines considering the off-design model of turbofan engine as well as employing multi-objective genetic algorithm. The design variables including high-pressure compressor pressure ratio, low-pressure compressor pressure ratio, fan pressure ratio and bypass ratio are calculated in such a way that the corresponding functions ...

Prior literature documents that the Sharpe ratio (SR) generates biases in performance evaluation if returns distribution deviates from normal because SR is derived under mean-variance model with strict assumption of either quadratic preferences or customarily distributed returns. When return distributions deviate normality, it may lead to unreasonable results. Therefore, this study examines whi...

An experiment was conducted to assess the optimum nutrient requirement and ideal mating ratios for Alabio ducks for production of fertile eggs and hatchability under rural feeding management. A total of 135 forty weeks old females and 27 males were used in the study. They were fed on low (17.5%), medium (19.5%) and high (21.5%) crude protein (CP) in diets containing approximately 3050 kcal of m...

Background Genetic impacts on handwriting legibility and speed, especially in early childhood, are not well understood. The present study used a 2D:4D ratio as a biological marker to investigate the associations between genetic factors with quality and speed of handwriting among the elementary school children. Ma...

One of the simplest heuristics for obtaining a proper coloring of a graph is the Fii-Fit algorithm: Fix an arbitrary ordering of the vertices and, using the positive integers as the color set, assign to each successive vertex the least integer possible (keeping the coloring proper). This is an example of an on-line algorithm for graph coloring. In the on-line model, a graph is presented one ver...

Conventionally, maximum average signal-to-noise ratio beamforming (Max-ASNR BF) and maximal-ratio combining (MRC) are applied to antenna array systems. A recently-proposed combining approach based on the Karhunen-Loève Transform (KLT) followed by MRC of the strongest resultant signals, denoted herein as maximal-ratio eigen-beamforming (MREC), was claimed to be superior and flexible compared to ...

The U.S. stock market enters the new millennium with five consecutive years of exceptional gains. The S&P 500 index has gained more than 18 percent each of these five years and its value has tripled since 1995. Whether these hefty gains will continue is an important question for many people. Investors obviously care because stock price movements directly affect their wealth. More generally, lar...