Paul S.,Muscat College
Proceedings of the World Congress on Engineering 2011, WCE 2011 | Year: 2011
Cluster based architecture is an effective architecture for data collection in wireless sensor network. However if network consists of some mobile nodes, it becomes difficult to design an energy efficient routing protocol because of frequent changes in topology. In this paper we consider mobility of nodes while constructing clusters. We have used modulo based technique for electing cluster heads. We identify the nodes which give redundant coverage in a round and put them into sleep to conserve energy, without affecting network coverage and connectivity. This is followed by selecting node far away from cluster head to sleep with higher probability. We analyze the energy consumption and the functional lifetime of network of the proposed scheme and compared with some of the established sleep scheduling schemes. Simulation results show that our scheme yields better and balanced energy savings while maintaining an equivalent sensing coverage and connectivity.
Akram M.,Muscat College
IEEE Transactions on Fuzzy Systems | Year: 2013
This study describes a new approach, i.e., the intuitionistic fuzzy success index method, for human reliability estimation using intuitionistic fuzzy sets. In our study, two offshore platform muster scenarios, i.e., "man overboard" and "gas release," were considered as an assessing and a reference task, respectively. Herein,we aggregated the weightings and ratings of various performance shaping factors concerned with "man overboard" to obtain the intuitionistic fuzzy success index (IFSI) of the assessing task. Thereafter, we considered the pooled discrete intuitionistic fuzzy subset of the IFSI as the causal event and the known human reliability as the resultant event.Using this,we generate an intuitionistic fuzzy relation between the two events of the concerned task. The composition of the discrete intuitionistic fuzzy subset of the IFSI and the intuitionistic fuzzy relation gave the human reliability in the assessing task man overboard.© 2013 IEEE.
Tahir M.,Muscat College |
Mahmood K.,University of Punjab |
Shafique F.,Islamia University of Bahawalpur
Electronic Library | Year: 2010
Purpose - The purpose of this paper is to assess the use of electronic information resources and facilities by humanities scholars at the University of the Punjab, Lahore, Pakistan. Design/methodology/approach - A questionnaire survey of faculty from arts and humanities departments at the University of the Punjab was conducted. In total, 62 faculty and research staff participated. Findings - The results correspond with previous studies conducted in other countries. The humanists still stick to the printed information sources but they pay good attention to electronic resources. Most of them have access to computer and internet at office and home. They are regular users of a variety of electronic technologies. Although faced with many problems, the humanists perceive that modern technology made their work easier. Research limitations/implications - The study is based only on the humanities faculty in a large university of Pakistan. The survey should be replicated on a larger sample for generalization. Practical implications - Keeping in view the positive trend of humanists towards modern technology, universities and libraries should give more funding to provide electronic resources and facilities in the arts and humanities discipline. Special training programmes for humanists should be organized. Originality/value - This is the first study on this topic in Pakistan. The results can be useful to design services and facilities in humanities libraries and information centres in Pakistan and other developing countries. © Emerald Group Publishing Limited 0264-0473.
Sherif M.,United Arab Emirates University |
Kacimov A.,Muscat College |
Javadi A.,University of Exeter |
Ebraheem A.A.,Water and Dams Section
Water Resources Management | Year: 2012
Groundwater pumping from Kalbha and Fujairah coastal aquifer of the United Arab Emirates (UAE) has increased significantly during the last two decades to meet the agriculture water demands. Due to the lack of natural replenishment from rainfall and the excessive pumping, groundwater levels have declined significantly causing an intrusion of seawater in the coastal aquifer of Wadi Ham. As a result, many pumping wells in the coastal zone have been terminated and a number of farms have been abandoned. In this paper, MODFLOW was used to simulate the groundwater flow and assess the seawater intrusion in the coastal aquifer of Wadi Ham. The model was calibrated against a five-year dataset of historical groundwater levels and validated against another eleven-year dataset. The effects of pumping on groundwater levels and seawater intrusion were investigated. Results showed that reducing the pumping from Khalbha well field will help to reduce the seawater intrusion into the southeastern part of the aquifer. Under the current groundwater pumping rates, the seawater will continue to migrate inland. © 2011 Springer Science+Business Media B.V.
D'Souza M.S.,Sultan Qaboos University |
Karkada S.N.,Muscat College |
Somayaji G.,Goa University
Health and Quality of Life Outcomes | Year: 2013
Background: Women facing social and economic disadvantage in stressed communities of developing countries are at greater risk due to health problems. This paper investigates the relationships between structural, health and psychosocial predictors among women in mining and agricultural communities. This paper is a report of a study of the predictors of the health-related quality of life among Indian women in mining and agricultural communities.Methods: A descriptive cross-sectional research design was used. The instruments used are SF-36 Health Survey and Coping Strategy Checklist. ANOVA, MANOVA and GLM were used in the analysis. The study was conducted between January-September 2008 with randomly selected women in a mining (145) and an agricultural community (133) in India.Results: Women in the agricultural community had significantly increased Physical Health, Mental Health and SF36 scores compared with those in the mining community. Years of stay, education and employment were significant predictors among women in the agricultural community. 39% (33%) and 40% (26%) of the variance in Physical and Mental health respectively among women in agricultural and mining communities are predicted by the structural, health and psychosocial variables.Conclusion: Perceived health status should be recognised as an important assessment of Physical and Mental Health among women in rural stressed communities. Cognitive, emotional and behavioural coping strategies are significant predictors of health related quality of life. Implications. Nurses should use the SF-36 as a diagnostic tool for assessing health related quality of life among women and discuss coping strategies, so that these can target women's adaptive behaviour. This should be an essential part of the nursing process for facilitating adaptive process for improved health related quality of life. © 2013 D'Souza et al.; licensee BioMed Central Ltd.
Shermina J.,Muscat College
2011 IEEE GCC Conference and Exhibition, GCC 2011 | Year: 2011
Face recognition technology has evolved as an enchanting solution to perform identification and the verification of identity claims. By advancing the feature extraction methods and dimensionality reduction techniques in the pattern recognition applications, number of facial recognition systems has been produced with distinctive degrees of success. In this paper, we have presented the biometric face recognition approach based on Multilinear Principal Component Analysis (MPCA) and Locality Preserving Projection (LPP) which enhance performance of face recognition. The methodology of the approach consists of face image preprocessing, dimensionality reduction using MPCA, feature Extraction using LPP and face recognition using L2 similarity distance measure. The proposed approach is validated with FERET and AT&T database of faces and compared with the existing MPCA and LDA approach in performance. Experimental results show the effectiveness of the proposed approach for face recognition with good recognition accuracy. © 2011 IEEE.
Shermina J.,Muscat College
2011 International Conference on Emerging Trends in Electrical and Computer Technology, ICETECT 2011 | Year: 2011
Face recognition technology has evolved as a popular identification technique to perform verification of human identity. By using the feature extraction methods and dimensionality reduction techniques in the pattern recognition applications, a number of facial recognition systems has been produced with distinct measure of success. Various face recognition algorithms and their extensions, have been proposed in the past three decades. However, face recognition faces challenging problems in real life applications because of the variation in the illumination of the face images. In the recent years, the research is focused towards Illumination-invariant face recognition system and many approaches have been proposed. But, there are several issues in face recognition across illumination variation which still remains unsolved. This paper provides a research on an efficient illumination-invariant face recognition system using Discrete Cosine Transform (DCT) and Principal Component Analysis (PCA). For processing the illumination invariant image, low frequency components of DCT are used to normalize the illuminated image, odd and even components of DCT is used for compensation in illumination variation and PCA is used for recognition of face images. The existing approaches in illumination Invariant face recognition are comprehensively reviewed and discussed. The proposed approach is validated with Yale Face Database B. Experimental results demonstrate the effectiveness of this approach in the performance of face recognition. © 2011 IEEE.
Singun A.P.,Muscat College
2016 International Conference on Industrial Informatics and Computer Systems, CIICS 2016 | Year: 2016
Usability Evaluation is one of the techniques used in the field of Human-Computer Interaction (HCI) in order to evaluate the extent of usability and level of acceptability of an Information System (IS) such as Web-Based Test Blueprint. A user-centered approach to development i.e. Interaction Design Model is encouraged in the design of computing interactive systems. First of its kind to carry out a usability evaluation for an educational assessment artefact such as the Web-based Test Blueprint, focusing on two (2) categories: the User Interface Heuristic Evaluation and the Test Blueprint Heuristic Evaluation. The User Interface Heuristics include the following: (a) Visibility of System Status, (b) Match Between the System and the Real World, (c) User Control and Freedom, (d) Consistency and Adherence to Standards, (e) Error Prevention, (f) Recognition Rather than Recall, (g) Flexibility and Efficiency of Use, (h) Authenticity and Minimalism in Design, (i) Recognition, Diagnosis, and Recovery from Errors, and (j) Help and Documentation. On the other hand, the Test Blueprint Heuristics include the following: (a) Content Validity, (b) Fairness and Comprehensiveness, (c) Accountability, and (d) Flexibility. In addition to these heuristics used in the evaluation are usability goals such as (a) Learnability, (b) Memorability, (c) Efficiency, (d) Effectiveness, and (e) Satisfaction of end users on the use of the Web-based Test Blueprint. The test case of this study is a website curtly called 'Test Prep e-ToolKit' which is readily accessible online. © 2016 IEEE.
Alkindi S.,Muscat College |
Dennison D.,Sultan Qaboos University
Sultan Qaboos University Medical Journal | Year: 2011
It is more than 20 years since the first cord blood transplant (CBT) was performed, following the realization that cord blood (CB), which is normally wasted, is rich in progenitor cells and capable of rescuing haematopoiesis. Since then it has been appreciated that CB is rich in stem cells, and has many other features not the least of which is its ability to rescue the transplanted patient without a rigid need for full human lymphocyte antigen (HLA) compatibility. Also it is easily accessible, relatively free from infections and poses no medical risk to the donor. However, the quantity of the stem cells is rather small, thus predominantly restricting its use to children or adults requiring double units. In Oman, we have taken a keen interest in stem cell research and also CBT. We see such activities as an avenue for our patients, for whom a compatible bone marrow (BM) or a peripheral blood donor cannot be found, to have an alternative in the form of CBT. This has encouraged us to establish a national voluntary cord blood bank (CBB) which is a valuable option open to a selected group of patients, as compared to the controversial private CBB. This national CBB will have a better representation of HLA-types common in the region, an improvement on relying on banks in other countries. Considering the need for stem cell transplant/therapy in this country, it is only appropriate that this sort of bank is established to cater for some of these requirements.
Khan M.M.,Muscat College
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2010
Reactions of [N12] macrocyclic ligand, L 2HClO4, with RuCl 3, PdCl2, K2[PtCl6], [K 2PtCl4] as well as [M(Ph3P)2Cl 2] (M = Pd or Pt), and [Ru(Ph3P)3Cl 2] produces bimetallic complexes whose analytical data are consistent with the molecular formulae as Ru2LCl4(ClO 4)2 (I), Pd2LCl2(ClO4)2 (II), Pt2LCl6(ClO4)2 (III), Pt 2LCl2(ClO4)2 (IV) and Ru 2LCl2(ClO4)2 (V). Reactions of the ligand with the precursors [M(Ph3P)2Cl2] (M = Pd or Pt), and [Ru(Ph3P)3Cl2], has released all the Ph3P ancillary ligand in solution. Magnetic moment, IR and UV-visible spectroscopic data confirms the encapsulation of metal ions in the macrocyclic cavities through chelation from aza groups of the unsymmetrical imine (CN) and amine (CNHC) functions. The macrocyclic moiety has accommodated both the lower as well as higher oxidation states of metal ions, i.e., Ru(II), Ru(III), Pd(II), Pt(II), and Pt(IV), which shows its flexible nature and capability to form stable complexes.