Physical Sciences and Engineering

For further understanding optical secure communication, we study chaos synchronization modeled by the nonlinear Schrödinger equation with Kerr law nonlinearity. By Melnikov method, we get the chaos signal which generated from rupturing of homoclinic orbits. By using feedback control technology and Lyapunov stability theory, we obtain the sufficient criteria of of chaos synchronization. Finally, we analysis the effects of all parameters on synchronization.

This article focuses on the research associated to the benefits of the e-learning in the smart cities. A theoretical analysis is explored in this paper. Emergent technology such as IoT is rapidly developing in the computing and digital world. Creation of the smart cities is growing with the concept of the IoT in parallel. E-citizens as one of the main elements have a vital role in the community and building the smart cities. It is self-evident that a new form of the citizen (e-citizen) in the smart cities can play a vital role if it receives adequate e-education.

The purpose of this study is to examine mood profiles of Tennis Coaches by using "Brunel Mood Scale". The method of the study, the definition and description of an existing situation have been stated in the research. Therefore, this can be identified as a cross-sectional study in the screening model of quantitative research methods. The study group is composed of the existing coaches affiliated to the Turkish Tennis Federation. "Brunel Mood Scale (BRUMS)" and personal information form have been used as data collection tools.

The soil sample was screened for isolating amylase producing soil bacteria. The isolates were observed for microscopic and selected biochemical tests for characterization. The results of gram staining reveal that the strains VO1, VO2 and VO3 were gram positive rods. The initial amylase production was confirmed by inoculating the isolates in Berg’s broth. The organisms were acclimatized to higher temperatures to evolve thermal stable enzyme by inoculating g the colonies at 400, 450 and 500C.

The research considers questions of chemical and mechanical denudation on the north-east slope of Lesser Caucasus. Thus according to data on tractional, suspended and soluble substances and considering their approximate theoretical relationship we have defined the total amount of substances which were transferred from the specified slope for one year. Considering the catchment area of this slope, we have defined the approximate value of denudation cutoff for 1000 years: ≈ 280 mm/1000 years. This value is compared with a number of data on river basins of Europe.

Bianchi Type VI0 massive string cosmological models with magnetic field and time dependent vacuum energy density following the technique used by Leterlier [18], are investigated. The conservation equation is satisfied for both the models where  is time dependent vacuum energy density. It is observed that the first model satisfies dominant and weak energy conditions given by Hawking and Ellis [51] while the second model satisfies weak energy conditions. Both the models represent decelerating phase of universe and anisotropy is maintained.

Background: The prevalence of anemia in pregnant women is 68% globally. In Africa its prevalence is estimated to be 66.8%. In Ethiopia, anemia is the severe public health problem affecting 62.7% of pregnant mothers and 52.3% non-pregnant women. Objective: To fit an appropriate statistical model and identify potential factors of anemic status among pregnant women in Ethiopia Methods: A cross-sectional study design carried out based on the secondary data of the Ethiopia Demographic Health Survey. Pregnant women of reproductive age (15-49) were included in the analysis.

Individual knowledge is the primary asset in the software industry and can lead its companies to achieve competitive advantage through Knowledge Management (KM) processes. One of the KM processes that stimulate innovation is the knowledge creation. However, this process needs monitoring to assess whether software industry companies are on the innovation way. An assessment is only possible through indicators which measure the KM processes performance.

Fourth-generation wireless communication system focus on two techniques which are, MIMO (Multiple Input and Multiple Output) and OFDM (Orthogonal Frequency Division Multiplexing) this paper demonstrates performance of BER of OFDM system using convolution code which used to encrypt the data stream that can be sent over communication channels, for different digital modulation schemes (8QAM, 16QAM, 32QAM and 64QAM) simulations in Matlab has been done for three different channels (AWGN , Racian and Rayleigh) , The obtained results show that 8QAM has good performance compared to other digital mo

This study aimed to evaluate the physical, chemical, microbiological and sensory characteristics of jelly obtained of green (GFJ) and ripe fruits (RFJ) of canjiqueira (Byrsonima cydoniifolia A. Juss), and verify changes during storage. Common-type jellies were made, sensorial characterized and later stored at room temperature (30°C), being analyzed just after processing and every 45 days for 135 days for pH, soluble solids, titratable acidity, color and microbiological parameters (mesophilic bacteria, yeasts and molds, and Salmonella spp.).