oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Search Results: 1 - 10 of 399 matches for " Mala Abba-Aji "
All listed articles are free for downloading (OA Articles)
Page 1 /399
Display every page Item
Simulation Using Sensitivity Analysis of a Product Production Rate Optimization Model of a Plastic Industry  [PDF]
Mala Abba-Aji, Vincent Ogwagwu, Bukar Umar Musa
Open Journal of Energy Efficiency (OJEE) , 2013, DOI: 10.4236/ojee.2013.23018
Abstract:

This study analyzes the sensitivity analysis using shadow price of plastic products. This is based on a research carried out to study optimization problem of BOPLAS, a plastic industry in Maiduguri, North eastern Nigeria. Simplex method of Linear programming is employed to formulate the equations which were solved by using costenbol software. Sensitivity analysis using shadow price reveals that the price of wash hand bowls is critical to the net benefit (profit) of the company.

KINETIC MODEL FOR GLUCOSE PRODUCTION FROM WHEAT STRAW MATERIAL USING ASPERGILLUS NIGER
B.K. HIGHINA,O.A.J. OLADOKUN,M.A. ABBA AJI
Journal of Applied Phytotechnology in Environmental Sanitation , 2012,
Abstract: The purpose of this paper is to develop a kinetic model for the production of glucose from wheat straw material using Aspergillus niger. The enzymatic hydrolysis of wheat- straw was investigated at the optimum conditions of hydrolysis. Kinetic parameters such as maximum rate of reaction, rmax, and Michealis Menten’s constant km, were determined to be 1.723*10-4 g.L-1.s-1 and 36.83 g.L-1 respectively. The model was developed and its reliability was tested with the experimental data and a mean standard deviation of 0.2 was obtained. This shows that the model is reliable and can be used in the design and analysis of a bioreactor for glucose syrup production from wheat- straw.
The Structure and the Electrical Properties of Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3 Ferroelectric Ceramics  [PDF]
Malika Abba, Ahmed Boutarfaia
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.29162
Abstract: The structural, the dielectric, and the piezoelectric properties of new ferroelectric Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3(0.46 ≤ x ≤ 0.55) ceramics have been investigated. All the samples were being sintered at a temperature ranging from 1000 to 1180℃ after being compacted in circular discs. The detailed structural and ferroelectric properties were carried out for sintered specimens. The results of X-ray diffraction showed that all the ceramics specimens have a perovskite phase. The phase structure of Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3 ceramics was transformed from the tetragonal to the rhombohedral, with an increase in the ratio of Zr/Ti in system. In the present system the MPB that coexists with the tetragonal and rhombohedral phases is a narrow composition region of x = 0.50 – 0.51. The scanning Electron Microscopy (SEM) showed an increase of the mean grain size when the sintering temperature was increased. The dielectric constant ε and the coupling factor Kp reached the maximum values, while the mechanical quality factor Qm and the loss tangent reached the lowest values when x = 0.50. For the composition where x = 0.50, these properties include ε = 5414 (at the Curie temperature), tangδ = 0.039, Kp = 0.67, Qm = 20 and a Curie temperature of 335℃.
An Efficient Approach for Segmentation, Feature Extraction and Classification of Audio Signals  [PDF]
Muthumari Arumugam, Mala Kaliappan
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.74024
Abstract: Due to the presence of non-stationarities and discontinuities in the audio signal, segmentation and classification of audio signal is a really challenging task. Automatic music classification and annotation is still considered as a challenging task due to the difficulty of extracting and selecting the optimal audio features. Hence, this paper proposes an efficient approach for segmentation, feature?extraction and classification of audio signals. Enhanced Mel Frequency Cepstral Coefficient?(EMFCC)-Enhanced Power Normalized Cepstral Coefficients (EPNCC) based feature extraction is applied for the extraction of features from the audio signal. Then, multi-level classification is done to classify the audio signal as a musical or non-musical signal. The proposed approach achieves better performance in terms of precision, Normalized Mutual Information (NMI), F-score and entropy. The PNN classifier shows high False Rejection Rate (FRR), False Acceptance Rate (FAR), Genuine Acceptance rate (GAR), sensitivity, specificity and accuracy with respect to the number of classes.
Exhaled nitric oxide in diagnosis and management of respiratory diseases
Abba Abdullah
Annals of Thoracic Medicine , 2009,
Abstract: The analysis of biomarkers in exhaled breath constituents has recently become of great interest in the diagnosis, treatment and monitoring of many respiratory conditions. Of particular interest is the measurement of fractional exhaled nitric oxide (FENO) in breath. Its measurement is noninvasive, easy and reproducible. The technique has recently been standardized by both American Thoracic Society and European Respiratory Society. The availability of cheap, portable and reliable equipment has made the assay possible in clinics by general physicians and, in the near future, at home by patients. The concentration of exhaled nitric oxide is markedly elevated in bronchial asthma and is positively related to the degree of esinophilic inflammation. Its measurement can be used in the diagnosis of bronchial asthma and titration of dose of steroids as well as to identify steroid responsive patients in chronic obstructive pulmonary disease. In primary ciliary dyskinesia, nasal NO is diagnostically low and of considerable value in diagnosis. Among lung transplant recipients, FENO can be of great value in the early detection of infection, bronchioloitis obliterans syndrome and rejection. This review discusses the biology, factors affecting measurement, and clinical application of FENO in the diagnosis and management of respiratory diseases.
Fixed point problems in Banach spaces
Abba Auwalu
Mathematics , 2015, DOI: 10.1186/1687-1812-2013-202
Abstract: We prove strong convergence theorems of some iterative algorithms in a real uniformly smooth Banach space. The results presented extend, generalize and improve the corresponding results recently announced by many authors.
Aware Time in Bug Fix—A Novel Automatic Test Case Selection for Prioritization of Version Control  [PDF]
G. Parkavi, D. Jeya Mala
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.77098
Abstract: The supreme goal of the Automatic Test case selection techniques is to guarantee systematic coverage, to recognize the usual error forms and to lessen the test of redundancy. It is unfeasible to carry out all the test cases consistently. For this reason, the test cases are picked and prioritize it. The major goal of test case prioritization is to prioritize the test case sequence and finds faults as early as possible to improve the efficiency. Regression testing is used to ensure the validity and the enhancement part of the changed software. In this paper, we propose a new path compression technique (PCUA) for both old version and new version of BPEL dataset. In order to analyze the enhancement part of an application and to find an error in an enhancement part of an application, center of the tree has been calculated. Moreover in the comparative analysis, our proposed PCUA- COT technique is compared with the existing XPFG technique in terms of time consuming and error detection in the path of an enhancement part of BPEL dataset. The experimental results have been shown that our proposed work is better than the existing technique in terms of time consuming and error detection.
Analysis of Land Use/Cover Dynamics in a Rapidly Urbanizing City: The Case of Gombe Metropolitan Area, Nigeria  [PDF]
Bulus L. Gadiga, Mala Galtima
Journal of Geographic Information System (JGIS) , 2017, DOI: 10.4236/jgis.2017.96040
Abstract: The study examines the dynamics of land use/cover in a rapidly urbanizing city of Gombe in Northeast Nigeria. The objective was to apply geospatial techniques in mapping and characterization of the pattern of land use changes in the metropolis that occurred between 1984 and 2015, and assess its’ implications on the socio-economic development of the city. The Landsat satellite images of the area were acquired and classified using maximum likelihood algorithm in identifying the historical trend in the land use changes. The application of Multi-Layer Perception (MLP) neutral network in the prediction of land use changes in the area reveals that Gombe metropolis has witnessed a phenomenal growth in size (133%) between 1991 and 2003. This growth was largely brought by changes in political status of the city that reflected in the socio-economic functions it performs. A 10-year trend in the growth forecast (2015-2055) reveals lack of abatement in the rapidity of this growth pattern. The consequences of this growth include the aggravation of the existing slumps, problems of infrastructure and housing among others. It is recommended that zonal-based planning approach be adopted within the framework of a master plan to tackle the existing and future development needs of the city. The implications of the findings are further discussed.
Temporal jurisdiction of international judicial and arbitral courts
aji? Sanja
Zbornik Matice Srpske za Drustvene Nauke , 2011, DOI: 10.2298/zmsdn1135011d
Abstract: Author explores different temporal aspects of jurisdiction of International Court of Justice, European Court for Human Rights and international investment arbitrations. Temporal limitations are two-fold: non-retroactivity of international acts, on one hand, and ratione temporis conditions for each and every international forum, on the other. Despite differences courts tend to conceptualize common elements across the borders of different jurisdictional rules. The rule of non-retroactivity will find its application before different fora, but discrepancies will emerge with respect to concepts of continuous and composite acts which potentially may overcome temporal limitations. This article explores intertemporal rule and non-retroactivity within the meaning of Article 28 of the Vienna Convention on the Law of Treaties and Articles 13-15 of ILC Articles on State Responsibility.
Adler-Bell-Jackiw anomaly in Weyl semi-metals: Application to Pyrochlore Iridates
Vivek Aji
Physics , 2011, DOI: 10.1103/PhysRevB.85.241101
Abstract: Weyl semimetals are three dimensional analogs of graphene where the energy of the excitations are a linear function of their momentum. Pyrochlore Iridates $(A_{2}Ir_{2}O_{7})$ with A =yttrium or lanthanide element) are conjectured to be examples of such a system, with the low energy physics described by twenty four Weyl nodes. An intriguing possibility is that these materials provide a physical realization of the Adler-Bell-Jackiw anomaly. In this letter we investigate the properties of pyrochlore iridates in an applied magnetic field. We find that the dispersion of the lowest landau level depends on the direction of the applied magnetic field. As a consequence the magneto-conductivity in an electric field, applied parallel to the magnetic field is highly anisotropic, providing a detectable signature of the semi-metallic state.
Page 1 /399
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.