September 2015

Adaptive Pixel-Selection Fractional Chaotic Map Lattices for image cryptography

Chaotic theory has been employed in cryptography application for establishing a sequence of data closest to pseudorandom number. Image cryptography with Chaotic Map Lattices (CML) uses the chaos parameters, the number of iterations and the number of cycles for encryption as secret keys. Amount of secret keys has a great impact on security in cryptography. Adaptive Pixel-Selection Fractional Chaotic Map Lattices (APFCML)...

Author(s): Jirasak Sittigorn and Kitti Paithoonwattanakij

September 2015

Evolutionary role of seed oils in plants: The case of Jatropha curcas L.

Seed oils in higher plants function as an energy source for germination, emergence and establishing as a new plant. Then, the seed oil must be a trait subjected to natural selection. In this work we revise the evolutionary function of seed oils in angiosperms, analyzing the patterns of seed oil accumulation and their fatty acids composition among species differing in habit, habitat and relatedness. We review some...

Author(s): Isidro Ovando-Medina, Miguel Salvador-Figueroa and María de Lourdes Adriano-Anaya

September 2015

Identification of the damage model parameters of thrust ball bearings under variable operating regime

Bearing is an important component of a rotating machine; however, under normal operating conditions, it is subjected to fatigue which results in a defect called spalling. This work presents a monitoring fatigue of a thrust ball bearing on a bearing fatigue test bench. Spalling is artificially initiated on a bearing raceway. Vibration analysis is the method used to characterize the defect. The experimental procedure used...

Author(s): O. Djebili and F. Bolaers

September 2015

Maritime continent winter circulation as a predictor of El Niño-Southern Oscillation (ENSO) influence on Ethiopia summer rainfall

Summer rainfall over the cropping region of Ethiopia is related to the precursor winter circulation around the Maritime Continent and El Niño–Southern Oscillation (ENSO) development and influence. Investigation of this link reveals that sea surface temperature (SST) in the north Indian Ocean and China Sea are anomalously cold and there are low level north-westerly wind anomalies around the Maritime...

Author(s): Mark R. Jury

September 2015

Predicting the permeability of pervious concrete pavement using artificial neural networks modeling

Pervious concrete (PC) pavement is a sustainable type of concrete pavement that can protect and restore natural ecosystem. The permeability coefficient is the most important characteristic of PC. The purpose of this experimental study was to investigate the effect of mixture design parameters, particularly water-to-cement ratio (W/C) and size of aggregate on the permeability coefficient of PC. The thirty six mixtures...

Author(s): Hassan Tajik Ghashghaei and Abolfazl Hassani