Open Access Method Article

Simulation of High-Current Intersecting Plasma Beams by MHD and Monte Carlo Methods

Luping Zhang, Sayf Elgriw, Emmanuel Boafo, Daniel Bondarenko, Hossam A. Gabbar

Current Journal of Applied Science and Technology, Page 1-12
DOI: 10.9734/BJAST/2015/20264

This paper deals with the 3D time-dependent intersecting plasma beams model using Magnetohydrodynamics and Monte Carlo methods under the conditions of high pressures (from 0.01 MPa up to 0.1 MPa) and high current (100 kA). After the detailed presentation of model, two methods have been fully analyzed in terms of intersecting plasma beams properties in the focal region. Here, we have compared the results of MHD time-dependent numerical simulation with MC stochastic and statistical particles simulation. Through success of these comparisons, we have demonstrated that MHD and MC methods provide practical tools to capture essential physics of intersecting plasma beams.

Open Access Short Communication

Characterization of Radiation Exposure Dose Rate from Waste Dumpsites within Owerri, Nigeria: An Atmospheric Concern

Ugochukwu K. Okoro, Ijeoma Dike, Chidiezie Chineke, Christiana Godwin, Chiamaka Chukwunyere

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/BJAST/2015/16360

This work evaluated the exposure dose rates emanating from five (5) selected waste dumpsites within the Owerri metropolis, Nigeria. The objectives are to measure the dose rates emanating from the selected dumpsites, evaluate the rates at which the radiation exposures diminished with distance at each dumpsite, show the relationship between the emissions emanating from each dumpsite within the metropolis and identify “Safety Zone”, which defined safe regions that can mitigate increased exposure dose rates. The data were acquired by a portable radiation survey meter (Radalert-100) and analyzed using descriptive statistics. The results show that all the waste dumpsites emit radiation that exceeds the ICRP recommended maximum permissible limit of 11.4 μR hr-1 for members of the public. However the radiation exposure dose rate obeying the inverse square law were observed to diminish with varying distance from the linear regression equation of the trends having rate values of -0.398 µR hr-1 m-1, -0.266 µ R hr-1 m-1, -0.348 µR hr-1m-1, -0.369 µR hr-1 m-1, -0.237 µR hr-1 m-1 and -0.323 µR hr-1 m-1 for dumpsites 1 to 5 and the areal average respectively. The exposure dose rate at each of the dumpsites significantly correlated to one another and to the areal average at 95% confidence level, then the attributes of one waste dumpsite stands for the other. The “Safety Zone” from all waste dumpsites was computed from the linear regression equation of the trends. This study is imperative as it point at a way in mitigating radiation exposure dose rates from waste dumpsites in developing cities around the world with similar attributes to Owerri metropolis, Nigeria.

Open Access Original Research Article

Drainage Network Analysis and Incidence of Flooding In Bonny Island, Nigeria

Ify L. Nwaogazie, O. Levi Uba, C. Charles Dike

Current Journal of Applied Science and Technology, Page 1-13
DOI: 10.9734/BJAST/2015/19376

The incidence of occasional flooding of an estate, a tank farm in Bonny Island, Niger Delta was investigated. The study was carried out to identify the remote causes of flooding and in turn proffer a solution. Detail field investigation involved identification of thirty one road side drains of rectangular cross-section; measurement of drains inverts (spot heights) at selected locations yielded estimates of longitudinal slopes (0.000416 – 0.0074 m/m), a case of very mild slopes. The invert profiles of 15 road side drains indicated a case of inconsistent slopes, a mix of positive and negative slopes over short intervals, the observation accounts for siltation and ponding in the drains. The redesigns of the existing drains were actualized via the use of MODRAIN code, based on the principle of best hydraulic section with input data options for rectangular or trapezoidal channels; constant or variable bottom slopes and runoff coefficient(s). A comparison of the existing and newly designed drains with respect to cross-sectional areas confirmed that 80% of the existing drains are oversized, in what is captioned “Bigger existing drains”. Apparently, the issue of occasional flooding of the Estate cannot be all blamed on inadequate drain size but on existing bottom slopes (very mild slopes) of the drains.

Open Access Original Research Article

Dynamic Biplot. Evolution of the Economic Freedom in the European Union

Jaime Egido, Purificación Galindo

Current Journal of Applied Science and Technology, Page 1-13
DOI: 10.9734/BJAST/2015/20289

This paper presents a new method called ‘Dynamic Biplot’ that applies to the representation of 3-way data. The Dynamic Biplot method is undertaken in two stages: First, it carries out a biplot analysis of the situation that is considered more representative in our analysis, the reference situation (static analysis); in the second stage, the rest of the situations are represented onto the analysis (dynamic analysis), obtaining trajectories of individuals and variables. The Dynamic Biplot method is used to analyse the evolution of the economic freedom in the European Union. The main results are that the countries outside the euro zone enjoy greater economic freedom and the Rule of law area (Property Rights and Freedom from Corruption) are the ones that better discriminate EU countries. To provide operational support to the Dynamic Biplot, it has developed a package in R and it has been applied to describe the evolution of the economic freedom in the EU.

Open Access Original Research Article

Physicochemical and Functional Quality of Tigernut Tubers (Cyperus esculentus) Composite Flour

L. Amoakoah Twum, A. A. Okyere, I. K. Asare, D. Duah-Bisiw, W. Torgby- Tetteh, E. A. Ayeh

Current Journal of Applied Science and Technology, Page 1-9
DOI: 10.9734/BJAST/2015/19972

Aims: To develop composite flour from Ghana’s underutilized tigernut and evaluate its physicochemical and functional properties.

Place and Duration of Study: Samples for the tigernut composite flour were obtained from the Madina market in Accra, Ghana, in May, 2014. Laboratory and data analyses were done at the Biotechnology and Nuclear Agriculture Research Institution of the Ghana Atomic Energy Commission, Accra- Ghana.

Methodology: Tigernut samples were obtained and dried using a hot air oven, soy bean samples were blanched for 30 mins and dehulled before drying with a hot air oven. Soy bean for germination were socked, drained and spread on a moist cotton cloth and allowed to germinate. Maize samples were roasted in a hot air oven till they became golden brown. All samples were subsequently milled into flour using a hammer mill. Tigernut, soy bean and maize flour were mixed into composite flour in seven different percentage ratios. Physicochemical and functional qualities of tigernut tuber composite flour were analyzed using appropriate protocols.

Results: There were significant differences in the physicochemical properties of all seven samples of tigernut composite flour. The highest mean value of moisture content recorded was 6.31±0.29% however it was within the acceptable range for flour. The highest mean values of total ash, pH and protein content recorded were 2.47±0.08%, 6.57±0.01 and 11.37±0.02% respectively. The functional properties had TMS1 recording the highest water absorption capacity mean value of 14.33±0.58% and TMS6 recording the highest bulk density and swelling power mean values of  0.86±0.03 g/cm3 and 5.40±0.14 g/g respectively. TMS4 recorded the highest solubility index mean values 27.00±2.00%.

Conclusion: Different percentage combination of tigernut, soy bean and maize significantly affect the physicochemical and functional properties of its composite flour. Utilization of tigernut in product development can cater for its underutilization and hence reduce its post harvest loses. Further work is however needed to establish its nutritional quality and shelf stability to determine the appropriate percentage combination.

Open Access Original Research Article

Home Care Security (HOCAS): A Telemedicine Project to Monitor Patients with Heart Failure and Atrial Fibrillation under Anticoagulation at Home

Emmanuel Andrès, Samy Talha, Mohamed Hajjam, Jawad Hajjam, Sylvie Ervé, Amir Hajjam

Current Journal of Applied Science and Technology, Page 1-7
DOI: 10.9734/BJAST/2015/19746

Monitoring patients with heart failure, atrial fibrillation and under anticoagulant agent by using telemedicine systems is a potential means for optimizing the management of these patients. The HOCAS project is developing an “intelligent” communicative platform enabling the home monitoring of patients with heart failure, arrhythmias and anticoagulation drugs using non-invasive sensors, electronic pillbox to promote therapy adherence, a questionnaire to monitor patients’ hygiene and diet, a questionnaire to monitor patients’ therapy adherence together with additional contextual information and patients’ profile. As a result, this platform will assist health care professionals by providing an automated processing of these sensors’ transmitted data in order to detect and report signs of cardiac decompensation early or wrong adherence to therapy.

Open Access Original Research Article

Effect of Aspergillus niger and Trichoderma viride on the Nutritional Composition of Alkali Pretreated Groundnut Husk

N. Aliyu, H. M. Inuwa

Current Journal of Applied Science and Technology, Page 1-7
DOI: 10.9734/BJAST/2015/15889

The effects of Aspergillus niger and Trichoderma viride on the nutritional composition of 2 M NaOH pre-treated groundnut husk (GH) were studied. The pre-treated groundnut husk (GH) was subjected to monoculture fermentation using A. niger and T. viride. The lignin and cellulose contents, proximate nutrient composition, anti-nutrients, minerals and amino acid contents were evaluated. The proximate composition of GH differed from one monoculture treatment to another. T. viride treatment gave the best as a result of 73% increase in protein with significant (p<0.05) decrease in anti-nutritional content such as phytate (51.22 g/100 g) and alkaloid (7 g/100 g). Significantly (p<0.05) higher values of phosphorous (774 ppm), zinc (20.42 ppm) and magnesium (6.94 ppm) were observed for all fermented GH compared to untreated GH (control), while significantly (p<0.05) lower values of copper (0.02 ppm), sodium (30 ppm) and iron (0.11 ppm) were observed for all fermented GH compared to control. Except for aspartate, there was general decrease in amino acid content of all cultured with T. viride and A. niger GH compared to the standard feed protein used to standardize the amino acid analyser. The amino acid contents of CGH A. niger were slightly higher than CGH T. viride. The results of this study indicate that T. viride is a potentially viable microorganism for the production of enriched and safe GH as an animal feed alternative.

Open Access Original Research Article

Department of Mathematics and Computer Science, Faculty of Science, Beirut Arab University, Lebanon.

Toufic El-Arwadi, Ali El-Zaart

Current Journal of Applied Science and Technology, Page 1-10
DOI: 10.9734/cjast/2015/v11i36899

Background: Blood vessel appearance is an important indicator for many diagnoses, including diabetes, hypertension, and arteriosclerosis.

Aims: Blood Vessel edge detection in retinal images is very important in medical image processing. A lot of algorithms have been suggested for extracting medical image edges.

Methodology: In this paper a new 5x5 edge detection masks are proposed based on the finite difference method.

Results: The proposed method is applied on a set of blood vessel images and we obtained good results in comparison with 5x5 Sobel mask.

 

 

Open Access Original Research Article

A Novel 5x5 Edge Detection Operator for Blood Vessel Images

Toufic El-Arwadi, Ali El-Zaart

Current Journal of Applied Science and Technology,
DOI: 10.9734/BJAST/2015/19967

Background: Blood vessel appearance is an important indicator for many diagnoses, including diabetes, hypertension, and arteriosclerosis.

Aims: Blood Vessel edge detection in retinal images is very important in medical image processing. A lot of algorithms have been suggested for extracting medical image edges.

Methodology: In this paper a new 5x5 edge detection masks are proposed based on the finite difference method.

Results: The proposed method is applied on a set of blood vessel images and we obtained good results in comparison with 5x5 Sobel mask.

Open Access Original Research Article

Kingdom of Bahrain Long Term Load Estimation Modeling

Isa S. Qamber, Mohammed Ismail, Yusuf Isa Khalifa, Abdul Razzaq Ismail

Current Journal of Applied Science and Technology, Page 1-18
DOI: 10.9734/BJAST/2015/20317

his paper highlights on different models of load estimating and the factors affecting the load. Various methods were discussed on forecasting the minimum and maximum load demand for the Kingdom of Bahrain; these methods are linear, exponential and polynomial. Using the three methods help to find the suitable models. Under the calculation of the load forecast, it has been mentioned some important parameters affecting the estimated loads which are mainly minimum and maximum loads, and their variation with the population. The article is prepared on the basis of data collection in the Kingdom of Bahrain. It concludes that the linear is the most suitable and efficient one in the research.

Open Access Review Article

The Edge Effect on the EEDF Measurements of Magnetized DC Plasma

A. R. Galaly, M. A. Khedr

Current Journal of Applied Science and Technology, Page 1-14
DOI: 10.9734/BJAST/2015/17663

The localized plasma parameters at the edge of the discharge electrodes cell have been investigated for axial distribution, such as the electric field distribution, the electron energy distribution functions (EEDF), the electron temperature (Te) and the electron density (Ne), all have been determined with and without the applications of external magnetic field using Langmuir single probe in the three regions of the discharge. The EEDF was investigated using two different methods e.g. the graphical method and the electron current second derivative method. The electron energy distribution functions are maxwellian only in the positive column region (P.C.) and non- maxwellian in the cathode fall (C.F) and the negative glow (N.G.) regions, where two groups of electrons were observed. The diffusion coefficients and the electron temperatures are lower in the presence of the magnetic field, where Te decreased from 6.5 to 3 eV for C.F, from 5.18 to 2.6 eV for N.G., and from 4.2 to 1.1 eV for P.C. Furthermore, sharp axial increments for potential distribution and electron density in the presence of the magnetic field were measured, whereas in the border between C.F and N.G regions, Ne increased from 4 x109 to 9.5 x109 cm-3 and 4.97 x109 to 11.6 x109 cm-3, respectively. In contrast, an axial decrement of the electron density in P.C. region due to the electron capture by the anode in P.C. region was also found.