Volume 4 Number 1 (January 2018)
http://ijaems.com/
Open Access international Journal to publish research paperen-usJanuary 2018Numerical simulation of biodiversity: comparison of changing initial conditions and fixed length of growing seasonThis study examined the effect of varying the initial value of industrialization for a fixed length of growing season on the prediction of biodiversity loss. We have found that when the initial value of industrialization is 0.1 under a shorter length of growing season, a relative low due of biodiversity loss can be maintained. The biodiversity loss value can be further lowered by maintaining the same length of growing season but with a reduced initial value of industrialization to 0.01 or 0.02. We would expect this alternative result to provide a further insight into our fight against biodiversity loss which has both human and sustainable development devastating effects.
http://ijaems.com/detail/numerical-simulation-of-biodiversity-comparison-of-changing-initial-conditions-and-fixed-length-of-growing-season/
Atsu J. U., Ekaka-a E.N.http://ijaems.com/upload_images/issue_files/1 IJAEMS-JAN-2018-1-Numerical simulation of.pdfNumerical and Statistical Quantifications of Biodiversity: Two-At-A-Time Equal VariationsThe ecological concept of biodiversity is a challenging environmental problem that requires a sound mathematical reasoning. We have used the method of a numerical simulation that is indexed by a numerical scheme to predict biodiversity loss and biodiversity gain due to a decreasing and increasing variations of the intrinsic growth rates together. The novel results that we have obtained that we have not seen elsewhere, but do complement other similar numerical predictions of biodiversity are presented and discussed quantitatively.
http://ijaems.com/detail/numerical-and-statistical-quantifications-of-biodiversity-two-at-a-time-equal-variations/
Ekaka-a E.N., Osahogulu D.J., Atsu J. U., Isibor L. A.http://ijaems.com/upload_images/issue_files/2 IJAEMS-JAN-2018-2-Numerical and Statistical.pdfModelling the effects of decreasing the inter–competition coefficients on biodiversity lossThe notion of a biodiversity loss has been identified as a major devastating biological phenomenon which needs to be mitigated against. In the short term, we have utilised a Matlab numerical scheme to quantify the effects of decreasing and increasing the inter – competition coefficients on biodiversity loss and biodiversity gain. On the simplifying assumption of a fixed initial condition(4,10), two enhancing factors of intrinsic growth rates, two inhibiting growth rates of intra – competition coefficients and two inhibiting growth rates of inter – competition coefficients. The novel results that we have obtained; which we have not seen elsewhere complement our recent contribution to knowledge in the context of applying a numerical scheme to predict both biodiversity loss and biodiversity gain.
http://ijaems.com/detail/modelling-the-effects-of-decreasing-the-inter-competition-coefficients-on-biodiversity-loss/
Ekaka-a E. N., Eke Nwagrabe, Atsu J. U.http://ijaems.com/upload_images/issue_files/3 IJAEMS-JAN-2018-3-Modelling the effects of decreasing.pdfSimulation modelling of the effect of a random disturbance on biodiversity of a mathematical model of mutualism between two interacting yeast speciesThe effect of a random disturbance on the ecosystem is one of the oldest scientific observations of which its effect on biodiversity is no exception. We have used ODE 45 numerical scheme to tackle this problem. The novel results that we have obtained have not been seen elsewhere; these are presented and fully discussed quantitatively.
http://ijaems.com/detail/simulation-modelling-of-the-effect-of-a-random-disturbance-on-biodiversity-of-a-mathematical-model-of-mutualism-between-two-interacting-yeast-species/
Eke Nwagrabe, Atsu J. U., Ekaka-a E. Nhttp://ijaems.com/upload_images/issue_files/4 IJAEMS-JAN-2018-4-Simulation modelling of the.pdfStudy of a Laboratory-based Gamma Spectrometry for Food and Environmental SamplesA comprehensive study on a laboratory-based Gamma Spectrometry has been presented in this paper for food and environmental samples. The system comprises of HPGe detector with proper cooling for minimizing thermal generation of charge-carriers and appropriate shielding to reduce background emission; associated processing electronics and acquisition as well as analysis software. The choice of HPGe detector for laboratory-based Gamma Spectrometry, its radiation interaction mechanism and system optimization have been presented.
http://ijaems.com/detail/study-of-a-laboratory-based-gamma-spectrometry-for-food-and-environmental-samples/
M. N. Islam, H. Akhter, M. Begum, Y. Mawla, M. Kamalhttp://ijaems.com/upload_images/issue_files/5 IJAEMS-JUL-2017-1-Study of a Laboratory-based.pdfDeterministic Stabilization of a Dynamical System using a Computational ApproachThe qualitative behavior of a multi-parameter dynamical system has been investigated. It is shown that changes in the initial data of a dynamical system will affect the stabilization of the steady-state solution which is originally unstable. It is further shown that the stabilization of a five-dimensional dynamical system can be used as an alternative method of verifying qualitatively the concept of the stability of a unique positive steady-state solution. These novel contributions have not been seen elsewhere; these are presented and discussed in this paper.
http://ijaems.com/detail/deterministic-stabilization-of-a-dynamical-system-using-a-computational-approach/
Isobeye George, Jeremiah U. Atsu, Enu-Obari N. Ekaka-ahttp://ijaems.com/upload_images/issue_files/6 IJAEMS-JAN-2018-6-Deterministic stabilization.pdfSimulation modeling of the sensitivity analysis of differential effects of the intrinsic growth rate of a fish population: its implication for the selection of a local minimumThe vulnerability of the differential effects of the intrinsic growth rates of the fish population on the uncertainty analysis can only be controlled by using the mathematical technique of a sensitivity analysis that is called a local minimum selection method based on a Matlab numerical scheme of ordinary differential equations of order 45 (ODE 45). The quantification of the p-norms sensitivity analysis depends on the application of the 1-norm, 2-norm, 3-norm, 4-norm, 5-norm, 6-norm and infinity-norm. In the context of this study, the best-fit intrinsic growth rate of fish population with a small error has occurred when its value is 0.303 which minimizes the bigger sensitivity values previously obtained irrespective of the p-norm sensitivity values. The novel results which we have obtained have not been seen elsewhere. These results are fully presented and discussed in this study.
http://ijaems.com/detail/simulation-modeling-of-the-sensitivity-analysis-of-differential-effects-of-the-intrinsic-growth-rate-of-a-fish-population-its-implication-for-the-selection-of-a-local-minimum/
Nwachukwu Eucharia C., Ekaka-a Enu-Obari N., Atsu Jeremiah U.http://ijaems.com/upload_images/issue_files/7 IJAEMS-JAN-2018-7-Simulation modeling of the.pdfRates of Soft Ground Tunneling in Vicinity of Existing StructuresSoft ground tunneling in the vicinity of existing structures is a major challenge to tunneling engineers. Tunneling works cause inevitable ground movements that may lead to unrecoverable damages to adjacent structures. Tunneling rates significantly affect such risks. However, a guideline that determines appropriate tunneling rates and accounts for the effects of tunneling on the structures existing in the vicinity is not available. Tunneling records in terms of TBM advance speed (AS), utilization factor (U), and advance rate (AR) for tunnels constructed without causing significant risks on the existing structures are presented in the paper.These records are discussed for different types of existing structures.Ranges of these records for tunneling without causing detrimental effects on different types existing structures are recommended.Useful observations are also made on the variation of these records with the ground type and composition and the precautions to be adopted to mitigate the tunneling risks on existing structures.
http://ijaems.com/detail/rates-of-soft-ground-tunneling-in-vicinity-of-existing-structures/
Ayman S. Shehata, Adel M. El-Kelesh, Al-Sayed E. El-kasaby, Mustafa Mansourhttp://ijaems.com/upload_images/issue_files/8 IJAEMS-JAN-2018-11-Rates of Soft Ground Tunneling.pdfPacking Improvement by using of Quality Function Deployment Method: A Case Study in Spare Part Automotive Industry in IndonesiaSales for automotive in Indonesia especially for 4-wheels vehicles and 2-wheels production is increase every year. Increase sales in Indonesia will be related to the needs of Spare Parts of the vehicle. Based on that, sector spare part need improvement to increase the sales and quality of spare part to gain trust of customer for buy spare part original and not buy spare part not original. Improvement will focus for packing this is because packing is one of element which can be increased sales and the difficulty to make improvements in a short time and with low investment in the field of production. QFD will be used to find best improvements for packing. Planning improvement for packing such as change material carton box (flute), redesigning, adding barcodes and hologram stickers. Results Use QFD for packaging repair. Customers are more focused on unboxing easy packing with a value of 249.5 points from 40% and substitute solid material packaging with 135 pints with 22% of QFD Technical priorities. With the following results customers prefer secure packing compared with interesting packing.
http://ijaems.com/detail/packing-improvement-by-using-of-quality-function-deployment-method-a-case-study-in-spare-part-automotive-industry-in-indonesia/
Humiras Hardi Purba, Adi Fitra , Gidionton Saritua Siagian, Widodo Dumadihttp://ijaems.com/upload_images/issue_files/9 IJAEMS-JAN-2018-5-Packing Improvement.pdfGravitational Model to Predict the Megalopolis Mobility of the Center of MexicoSince 1950, Mexico has presented an accelerated migration process to the country’s capital, Mexico City. Here is where new settlements emerged increasing its population, and as a positive consequence, employment improved together with provisions. This growth occurred until the 1980s, when a conurbation happened with some municipalities of the State of Mexico, creating the Metropolitan Area of the Valley of Mexico. In the beginning of the 21st century, new challenges arose with the integration of more metropolitan areas in the states of Mexico (Valley of Toluca), Hidalgo, Morelos, Puebla, Tlaxcala and Queretaro.
This document is the result of two extensive research projects that took place from 2008 to 2016, along with the population institutions of the states that were integrated. The objective was to demonstrate the existence of the Megalopolis and its operation, based on a socio-demographic model to understand its composition and characteristics. However, when limited to demographic variables, it was difficult to analyze its operation. Therefore, the Gravitational Model was designed to establish the great diversity of mobility relationships to account for the functional composition. Thus, the population mobility that commutes daily to the interior of the Megalopolis will be the fundamental factor to explain its operation.
http://ijaems.com/detail/gravitational-model-to-predict-the-megalopolis-mobility-of-the-center-of-mexico/
Juan Bacilio Guerrero Escamilla, Sócrates López Pérez, Yamile Rangel Martínez, Silvia Mendoza Mendozahttp://ijaems.com/upload_images/issue_files/10 IJAEMS-JAN-2018-8-Gravitational Model to Predict.pdfArtificial Neural Network Controller for Reducing the Total Harmonic Distortion (THD) in HVDCA neural network based space vector modulation (SVM) of voltage source inverter is proposed. The voltage source converter (VSC) is highly used in high voltage direct current (HVDC) transmission so that a detailed analysis and transmission of this system is carried out. In addition, a non-linear neural network controller is proposed to control the space vector pulse width modulation (SVPWM) to reduce the total harmonic distortion (THD) of the converter (inverter) output voltage. The inverter outputcurrent is analyzed with two switching frequency 1050Hz and1450Hz with and without proposed ANN controller. The results show a THD enhancement about 0.74 % for 1050Hz and 0.68 % for 1450Hz.
http://ijaems.com/detail/artificial-neural-network-controller-for-reducing-the-total-harmonic-distortion-thd-in-hvdc/
Dr. Ali Nathem Hamoodi, Rasha Abdul-nafaa Mohammedhttp://ijaems.com/upload_images/issue_files/11 IJAEMS-DEC-2017-10-Artificial Neural Network Controller.pdfQuantic Analysis of Formation of a Biomaterial of Latex, Retinol, and Chitosan for Biomedical ApplicationsThe present work shows the quantum theoretical analysis and practical tests for the formation of a homogeneous mixture with Latex (Lx), Chitosan (Qn) and Retinol (Rl), which work as possible biomaterial for regeneration of epithelial tissue. Lx, Qn, and Rl compounds molecules were designed through Hyperchem to get the coefficient of electrostatic potential calculations. The amounts used to create the biomaterial are minimum depending on the quantities of molecules used in chemical design. A positive calculation was obtained for the reaction of these three compounds and the formation of the biomaterial in physical checking theory etc.
http://ijaems.com/detail/quantic-analysis-of-formation-of-a-biomaterial-of-latex-retinol-and-chitosan-for-biomedical-applications/
Karina García-Aguilar, Iliana Herrera-Cantú, Erick Pedraza-Gress, Lillhian Arely Flores-Gonzalez, Manuel Aparicio-Razo, Oscar Sánchez-Parada, Emmanuel Vázquez-López, Juan Jesús García-Mar, Manuel González-Pérezhttp://ijaems.com/upload_images/issue_files/12 IJAEMS-JAN-2018-15-Quantic Analysis of Formation.pdf