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INTI INTERNATIONAL UNIVERSITY

LIST OF RESEARCH PAPERS

 

 

 

 

·         FOBCAL

 

FACULTY OF SCIENCE, TECHNOLOGY, ENGINEERING AND MATHEMATICS - FOSTEM

 

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Akel, M., Al-Hawat, S., & Lee, S. (2010). “Pinch current and soft X-ray yield limitations by numerical experiments on nitrogen plasma focus”. Journal of fusion energy, 29(1), 94-99.

 

Akel, M., Al-Hawat, S., Saw, S. H., & Lee, S. (2010). Numerical experiments on oxygen soft X-ray emissions from low energy plasma focus using Lee model. Journal of Fusion Energy, 29(3), 223-231.

 

Ang, W. T., & Park, Y. S. (1996). “Stresses around a periodic array of planar cracks in an

anisotropic biomaterial”. International journal of engineering science, 34(13), 1457-1466.

 

Carver,Andy, Halpin,Terry. (2013). “Reference Scheme Reduction on Subtypes in ORM.” OTM 2013 Workshop, LNCS 8186 : 457-466

 

Choong,Chieh Wean, Choong,S.M., Thong,Weng Hing. (2013). “A defined culture medium suitable for sensitive Phalaenopsis species seedlings.” Biotechnology (Advance online publication), Vol.12, Issue 3 : 163-167

 

Fat, L. T., Mahadi, W., & Soin, N. (2009). “The performance of tapered feed network and quarter-wavelength transformer feed network at KU-Band. In 2009 International Conference for Technical Postgraduates (TECHPOS).

 

Foong, K. C., Chee, C. T., & Wei, L. S. (2009). Adaptive network fuzzy inference system (ANFIS) handoff algorithm. In Future Computer and Communication, 2009. ICFCC 2009. International Conference on (pp. 195-198). IEEE.

                                   

Fuller, A., McFarlane, P., & Lam, K. (2002). “Remote collaborative teaching for computer Science”.

 

Halpin, T. (2009).”Predicate Reference and Navigation in ORM. In On the Move to Meaningful Internet Systems: OTM 2009 Workshops (pp. 723-734). Springer Berlin Heidelberg.

 

Halpin, T., & Wijbenga, J. P. (2010). “FORML 2. In Enterprise, Business-Process and Information Systems Modeling (pp. 247-260). Springer Berlin Heidelberg

 

Halpin, T. (2010). “Object-role modeling: principles and benefits. International Journal of Information System Modeling and Design (IJISMD), 1(1), 33-57.

 

Halpin, T., Curland, M., Stirewalt, K., Viswanath, N., McGill, M., & Beck, S. (2010). Mapping ORM to datalog: An overview. In On the Move to Meaningful Internet Systems: OTM 2010 Workshops (pp. 504-513). Springer Berlin Heidelberg.

 

Halpin, T. (2011). Structural aspects of data modeling languages. In Enterprise, Business-Process and Information Systems Modeling (pp. 428-442). Springer Berlin Heidelberg.

 

Idrus, N.Knowledge capacity building through quality management of education and  institutions  of higher learning”.

         Nirwan Idrus PhDMonashIQALondon, 4(1), 111.

 

Lee, J., Hong, N. L., & Ling, N. L. (2001). “An analysis of students' preparation for the virtual  learning environment”.

           The internet and higher education, 4(3), 231-242.

 

Lee, S., & Saw, S. H. (2008). “Pinch current limitation effect in plasma focus”. Applied Physics Letters, 92(2), 021503.

 

Lee, S., Saw, S. H., Lee, P. C. K., Rawat, R. S., & Schmidt, H. (2008). “Computing plasma focus pinch current from total current measurement.” Applied Physics Letters, 92(11), 111501-111501.

 

Lee, S., Lee, P., Saw, S. H., & Rawat, R. S. (2008). “Numerical experiments on plasma focus  pinch current limitation”. 

 Plasma Physics and Controlled Fusion,50(6), 065012

 

Lee, S., & Saw, S. H. (2010). Numerical experiments providing new insights into plasma focus fusion devices. Energies, 3(4), 711-737.

 

Morgan, T. (2010). A proposal for folding in ORM diagrams. In On the Move to Meaningful Internet Systems: OTM 2010 Workshops (pp. 474-483). Springer Berlin Heidelberg.

 

Sannasi, P., Kader, J., Ismail, B. S., & Salmijah, S. (2006). “Sorption of Cr (VI), Cu (II) and Pb (II) by growing and non-

growing cells of a bacterial consortium”. Bioresource technology, 97(5), 740-747.

 

Sannasi, P., Kader, J., Othman, O., & Salmijah, S. (2006). “Single and MultiMetal Removal by an Environmental Mixed

Bacterial Isolate”. Modern Multidisciplinary Applied Microbiology:   Exploiting Microbes and Their Interactions,

         136-141.

 

Saw, S. H., Lee, S., Roy, F., Chong, P. L., Vengadeswaran, V., Sidik, A. S. M.,& Singh, A.(2010).In situ determination of the static inductance and resistance of a plasma focus capacitor bank. Review of Scientific Instruments, 81(5), 053505.

 

Soh, S. C., & Abdullah, M. P. (2007). “Determination of volatile organic compounds pollution sources in Malaysian

drinking water using multivariate analysis. Environmental monitoring and assessment”, 124(1-3), 39-50.

 

Srinivasan, M., & Praslad, S. M. (2005). “Advanced thermoelectric energy recovery system in light duty and heavy duty

vehicles: Analysis on technical and marketing challenges”. In Power Electronics and Drives Systems, 2005. PEDS

     2005. International Conference on (Vol. 2, pp.977-982). IEEE.

 

Subbarayan, S., & Ramanathan, S. K. (2009). “Effective Watermarking of Digital Audio and Image Using Matlab Technique. In Machine Vision, 2009. ICMV'09. Second International Conference on (pp. 317-319). IEEE

Suresh, G. R., Sudha, S., & Sukanesh, R. (2009). “Performance evaluation of shape adaptive discrete wavelet transform based magnetic resonance images coding. In Future Computer and Communication, 2009. ICFCC 2009. International Conference on (pp. 182- 186). IEEE.

 

Wong,Ling Shing, Lee,Yook Heng, Surif,Salmijah. (2013). “Performance of a cyanobacteria whole cell-based fluorescence biosensor for heavy metal and pesticide detection.” Sensors, Vol.13, Issue 5 : 6394

 

Wong,Ling Shing, Lee,Yook Heng, Surif,Salmijah. (2013). “Whole cell biosensor using Anabaena torulosa with optical transduction for environmental toxicity evaluation.” Journal of Sensors, Vol.2013, Article ID 567272

 

Yee-Loong Chong, A., & Ooi, K. B. (2008). “Adoption of interorganizational system standards in supply chains: an   empirical analysis of RosettaNet standards”. Industrial Management & Data Systems, 108(4), 529-547.

 

 

 

 

 

 

 

 

Abstract

 

Stresses around a periodic array of planar cracks in an anisotropic biomaterial

 Ang, W.T., Park, Y.S. (1996)

 

The problem of calculating the stress distribution around a periodic array of planar cracks in an anisotropic elastic half-space which adhere perfectly to another anisotropic half-space is considered. It is formulated in terms of a system of hypersingular integral equations with the crack-opening displacements as unknown functions. For a specific case involving transversely-isotropic materials, the integral equations are solved numerically through the use of a collocation technique and numerical values of useful quantities, such as the crack tip stress intensity factors, are computed.

 

Document type : Article

Source type : Journal

Sources :  Sciencedirect

Link: http://www.sciencedirect.com/science/article/pii/0020722596000651

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A defined culture medium suitable for sensitive Phalaenopsis species seedlings

Choong,Chieh Wean, Choong,S.M., Thong,Weng Hing. 2013

 

Half strength MS medium supplemented with peptone was found to inhibit growth of considerable number of Phalaenopsis species seedlings and this hamper conservation effort. It is therefore important to design a reproducible defined medium that is not selective and could support a wide range of genotypes. This could be achieved by adjusting the macronutrient concentrations. A new defined medium was designed with nitrate-nitrogen (NO3-N) to ammonium-nitrogen (NH4-N) ratio of 5 and N to S ratio of 15, buffered with 800 mg dm-3 KH2PO4 andNPK ratio of 2.0:0.8:3.1. Mean fresh weight, dry weight and root to shoot ratio was compared with control medium. In contrary to control medium that stunted growth of significant number of Phalaenopsis aphrodite, Phalaenopsis bellina and Phalaenopsis violacea seedlings, the new medium was found to significantly support growth of the seedlings and improved root development. In addition, the new medium was not selective against sensitive seedlings as the data from new medium pass normality test while data from control medium was skewed in P. bellina. This new medium is recommended for maintaining genetic diversity in conservation programs by improving seedling survival and growth in vitro.

 

Source : Biotechnology

Document type : Article

Source type : Journal

Keywords: Moth orchid, germination, germinated seedlings, nitrate nutrition

Link : http://docsdrive.com/pdfs/ansinet/biotech/0000/54975-54975.pdf

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Performance of a cyanobacteria whole cell-based fluorescence biosensor for heavy metal and pesticide detection

Wong,Ling Shing, Lee,Yook Heng, Surif,Salmijah. 2013

 

Whole cell biosensors always face the challenge of low stability of biological components and short storage life. This paper reports the effects of poly(2-hydroxyethyl methacrylate) (pHEMA) immobilization on a whole cell fluorescence biosensor for the detection of heavy metals (Cu, Pb, Cd), and pesticides (dichlorophenoxyacetic acid (2,4-D), and chlorpyrifos). The biosensor was produced by entrapping the cyanobacterium Anabaena torulosa on a cellulose membrane, followed by applying a layer of pHEMA, and attaching it to a well. The well was then fixed to an optical probe which was connected to a fluorescence spectrophotometer and an electronic reader. The optimization of the biosensor using several factors such as amount of HEMA and drying temperature were undertaken. The detection limits of biosensor without pHEMA for Cu, Cd, Pb, 2,4-D and chlorpyrifos were 1.195, 0.027, 0.0100, 0.025 and 0.025 μg/L respectively. The presence of pHEMA increased the limits of detection to 1.410, 0.250, 0.500, 0.235 and 0.117 μg/L respectively. pHEMA is known to enhance the reproducibility of the biosensor with average relative standard deviation (RSD) of ±1.76% for all the pollutants tested, 48% better than the biosensor without pHEMA (RSD = ±3.73%). In storability test with Cu 5 μg/L, the biosensor with pHEMA performed 11.5% better than the test without pHEMA on day-10 and 5.2% better on day-25. pHEMA is therefore a good candidate to be used in whole cell biosensors as it increases reproducibility and enhances biosensor storability.

 

Source : SENSORS

Document type : Article

Source type : Journal

Keywords: Biosensors; Cyanobacteria; Bacterial cells; Fluorescence; Heavy metals; Pesticides – Testing; Polymethacrylates

Link : http://www.mdpi.com/1424-8220/13/5/6394/pdf 

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Reference Scheme Reduction on Subtypes in ORM

Carver,Andy, Halpin,Terry. 2013

 

Object-Role Modeling (ORM) allows composite reference schemes for object types to be portrayed using either objectification (in the sense of situational nominalization) or coreference (as defined in ORM rather than linguistics). In practical modeling, cases can arise where a subtype of a compositely identified object type has a natural reference scheme that utilizes only some components of the supertype’s reference scheme. Using the supertype’s reference scheme to verbalize facts for the subtype then leads to redundancy or other irrelevance in the verbalization. Moreover, if such cases are input directly to the ORM’s standard relational mapping procedure (Rmap), this can lead to table schemes that are not fully normalized. The paper identifies ways in which such problems can arise, and proposes ways to avoid these problems, partly by extending earlier work on reference scheme reduction, role redirection, and disjunctive reference, illustrating the approach with some practical examples.

 

Source : OTM 2013 WORKSHOPS

Document type : Conference paper

Source type : Book series

Keywords: Object-role modeling, Practical model, Relational mapping, Supertype; Artificial intelligence

Link : http://link.springer.com/chapter/10.1007/978-3-642-41033-8_59

 

 

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Whole cell biosensor using Anabaena torulosa with optical transduction for environmental toxicity evaluation

Wong,Ling Shing, Lee,Yook Heng, Surif,Salmijah. 2013

 

A whole cell-based biosensor using Anabaena torulosa for the detection of heavy metals (Cu, Pb, and Cd), 2,4-dichlorophenoxyacetate (2,4-D), and chlorpyrifos was constructed. The cyanobacteria were entrapped on a cellulose membrane through filtration. Then, the membrane was dried and fixed into a cylindrical well, which was designed to be attached to an optical probe. The probe was connected to fluorescence spectrometer with optical fibre. The presence of the toxicants was indicated by the change of fluorescence emission, before and after the exposure. The linear detection ranges for Cu, Pb, and Cd were 2.5–10.0 µg/L, 0.5–5.0 µg/L, and 0.5–10.0 µg/L, respectively, while 2,4-D and chlorpyrifos shared similar linear ranges of 0.05–0.75 µg/L. The biosensor showed good sensitivity with the lowest limits of detection (LLD) for Cu, Pb, Cd, 2,4-D and chlorpyrifos determined at 1.195 µg/L, 0.100 µg/L, 0.027 µg/L, 0.025 µg/L, and 0.025 µg/L, respectively. The overall reproducibility of the biosensor () was <±6.35%. The biosensor had been tested with different combinations of toxicants, with the results showing predominantly antagonistic responses. The results confirmed that the biosensor constructed in this report is suitable to be used in quantitative and qualitative detections of heavy metals and pesticides.

 

Source : Journal of Sensors

Document type : Article

Source type : Journal

Keywords: Whole cell; biosensor; heavy metals; environment toxicants

Link : http://www.hindawi.com/journals/js/2013/567272/

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An analysis of students' preparation for the virtual learning environment, Lee, J., Hong, N.L., Ling, N.L. (2001)

While improving quality, reducing costs, and increasing access are the key issues being discussed by administrators and academics of higher education, the advances in the information and communication technologies (ICT) have been perceived as the solution to problems relating to these issues. The literature on the uses of ICT in higher education has provided much information describing the design and development of a technical framework for supporting the virtual learning environment (e.g., Kostopoulos [Internet Res.: Electron. Networking Appl. Policy 8 (1998) 257.]; Jafari [WebNet J. (1999).]; Chia et al. [Paper presented at the International Conference on the Emerging Trends in Electronic Commerce 2000, Kuala Lumpur (2000).]). Many studies have examined the designs of online courses (e.g., Human & Kilbourne [J. Manage. Educ. 23 (1999).]; St. Pierre [WebNet J. (1999, July–September).]; Chuang [Interact. Multimedia Electron. J. Comput.-Enhanced Learn. 1 (1999).]; Thompson & McGrath [J. Asynchronous Learn. Networks 3 (1999).]; Leon & Parr [Am. Stat. 54 (2000).]; Kaynama & Keesling [J. Mark. Educ. 22 (2000).]). Some studies have compared students' learning experiences in online courses (e.g., Hiltz et al. [J. Asynchronous Learn. Networks 4 (2000).]; Wegner et al. [J. Asynchronous Learn. Networks 3 (1999).]; Ernest & Federico [J. Asynchronous Learn. Networks 4 (2000).]; Fallah & Ubell [ALN Mag. 4 (2000).]; Watters [J. Educ. Bus. 75 (2000).]). The processes of collaboration and communication between learners and teachers are increasingly computer-mediated, such as via the Internet. From the learner's perspective, perhaps the most significant and detrimental factors to the success of a virtual learning environment are stress, association with technology use, and dissatisfaction towards the technology itself. It is suggested, conceivably, that the success of any virtual learning environment depends on the adequate skills and attitudes of learners. This proposition is evidenced by the popularity of online course delivery at postgraduate level when compared with undergraduate degree courses; as it is commonly believed that postgraduate students are mature and motivated to undertake self-study as required in most virtual learning environments. The authors present a study with the purpose to access preparation of learners. A questionnaire, comprised of adoptions of several existing instruments (Teo & Lim [Women Manage. Rev. 11 (1996).]; Stone & Arunachalam [Issues Account. Educ. 11 (1996).]; Chau [J. Manage. Inf. Syst. 13 (1996).]; Compeau & Higgings [MIS Q. 23 (1999).]; McMahon et al. [J. Comput. Assisted Learn. 15 (1999).]; Shaw & Peter [J. Asynchronous Learn. Networks 4 (2000).]; Venkatesh & Morris [MIS Q. 24 (2000).]), was administered to appraise experiences with computers and attitudes toward computers of students enrolled in a private college offering tertiary education in Malaysia. Awareness of information available on the Internet, access to the Internet, age, perceived effectiveness, and usefulness of ICT in study are suggested to be important factors in determining learners' use of the Internet in a virtual learning environment. The aim of this study is to identify factors that address the requirements of learners to enable appropriate use of ICT in their learning.

Source : Sciencedirect

Document type : Article

Source type : Journal

Keywords : Virtual learning; Online education; Learner preparations; Perceptions

Link:  http://www.sciencedirect.com/science/article/pii/S109675160100063X

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Remote collaborative teaching for computer science,  Fuller, A., McFarlane, P., Lam, K. (2002)

 

Like many western universities, the University of Wollongong (Australia) is offering degrees to an increasing number of offshore students. Their usual offshore teaching model involves intensive delivery of course material. Disadvantages of this model include the apparent secondary nature of the offshore academic's role and its unsuitability for technical subjects. In this paper, the authors discuss experiments using Internet technologies to overcome those disadvantages

 

Document type : Article

Source type : Journal

Keyword: Computer aided instruction, computer science education, distance learning, teaching, remote collaborative teaching.

Link: http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1009&context=infopapers

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Advanced Thermoelectric Energy Recovery System in Light Duty and Heavy Duty Vehicles: Analysis on Technical and Marketing Challenges, Srinivasan, M., Praslad, S.M. 2005

Thermoelectric materials - materials that exploit a phenomenon in which the application of heat to combination of certain metals induces an electric current- are emerging as potentially important systems for increasing fuel efficiency and decreasing emissions in future automotive vehicles. The issue of thermoelectric efficiency for automotive application is examined from the standpoint of what material figures of merit (FOMs) enables solid-state devices to compete with conventional electricity generator or vapor compression refrigerators. It is estimated that FOMs of (ZT) equal to or greater than 8 is required. Some of the emerging new bulk materials may eventually reach that level of performance. The goal is to use that excess heat to create electricity that would support many of the existing vehicle system and to deliver the sufficient power to be able to replace mechanical system with electrical system. In this paper many of the automotive marketing issues and technical challenges are taken for discussion, like development of TE generator in light and heavy-duty vehicles, what type TE material, what are all the optimum design parameters like exhaust gas flow rate, its temperature, and suitable location in the vehicle are discussed. Apart from above, how the same TE material can be used in vehicular cooling/heating/climate control also discussed.

Source: IEEE

Document type: Article

Source type: Journal

Link: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1619829

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Sorption of Cr(VI), Cu(II) and Pb(II) by growing and non-growing cells of a bacterial consortium, Sannasi, P., Kader, J., Ismail, B.S., Salmijah, S. 2005

This paper reports the sorption of three metallic ions, namely Cr(VI), Cu(II) and Pb(II) in aqueous solution by a consortium culture (CC) comprising an acclimatised mixed bacterial culture collected from point and non-point sources. Metal sorption capability of growing and non-growing cells at initial pH of between 3 and 8 in the 1–100 mg/L concentration range were studied based on Qmax and Kf values of the Langmuir and linearised Freundlich isotherm models, respectively. Maximal metal loading was generally observed to be dependent on the initial pH. Growing cells displayed significant maximal loading (Qmax) for Pb(II) (238.09 mg/g) and Cu(II) (178.87 mg/g) at pH 6 and at pH 7 for Cr(VI) (90.91 mg/g) compared to non-growing cells (p < 0.05). At the pH range of 6–8, growing cells showed higher loading capacity compared to non-growing cells i.e. 38–52% for Cr, 17–28% for Cu and 3–17% for Pb. At lower metal concentrations and at more acidic pH (3–4) however, non-growing cells had higher metal loading capacity than growing cells. The metal sorption capacity for both populations were as follows: Pb(II) > Cu(II) > Cr(VI).

Source :  Sciencedirect

Document type: Article

Source type : Journal

Keywords : Bacterial consortium; Sorption; Metal loading; Heavy metal

Link: http://www.sciencedirect.com/science/article/pii/S0960852405002129

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Knowledge capacity building through quality management of education and institutions of higher learning, Nirwan Idrus.  2006

The globalization of knowledge or information is multidirectional. It only makes sense when the provider and recipient of the knowledge or information are capable of both providing and receiving. The fact currently is that this is not the case, especially when it involves developing countries. While the expectations are that developing countries should at least be able to receive, if not provide, the education infrastructure is normally not present to allow that to happen. This paper proposes an exploration into effective learning, a move away from current pedagogical thinking and delivery and instilling innovative management of institutions of higher learning, so that we could catch up with the rest of the world and hence join them in globalizing knowledge and information. In particular, this paper discusses the demise of rote learning in this technological and globalised world and challenges the Asian values concept of acceptance. In combating these educational drawbacks, this paper advocates a fundamental change in the requirements of teachers in the broadest sense of the word (i.e. including lecturers and professors). At the same time this paper also discusses the need for a conducive environment to allow the above to occur. This leads to a quality-based management of higher education institutions. This requirement has become a given in many developed countries.

Source: Seaair

Document type : Article

Source type : Journal

Link: http://www.seaair.au.edu/journal/JIRSEA%20v4%20n1%202006%20Papers.pdf#page=111

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Determination of volatile organic compounds pollution sources in Malaysian drinking water using multivariate analysis, Soh, S.-C., Abdullah, P. 2007

A field investigation was conducted at all water treatment plants throughout 11 states and Federal Territory in Peninsular Malaysia. The sampling points in this study include treatment plant operation, service reservoir outlet and auxiliary outlet point at the water pipelines. Analysis was performed by solid phase micro-extraction technique with a 100 μm polydimethylsiloxane fibre using gas chromatography with mass spectrometry detection to analyse 54 volatile organic compounds (VOCs) of different chemical families in drinking water. The concentration of VOCs ranged from undetectable to 230.2 μg/l. Among all of the VOCs species, chloroform has the highest concentration and was detected in all drinking water samples. Average concentrations of total trihalomethanes (THMs) were almost similar among all states which were in the range of 28.4--33.0 μg/l. Apart from THMs, other abundant compounds detected were cis and trans-1,2-dichloroethylene, trichloroethylene, 1,2-dibromoethane, benzene, toluene, ethylbenzene, chlorobenzene, 1,4-dichlorobenzene and 1,2-dichloro - benzene. Principal component analysis (PCA) with the aid of varimax rotation, and parallel factor analysis (PARAFAC) method were used to statistically verify the correlation between VOCs and the source of pollution. The multivariate analysis pointed out that the maintenance of auxiliary pipelines in the distribution systems is vital as it can become significant point source pollution to Malaysian drinking water.

Source: Springer.com

Document type : Article

Source type : Journal

Keywords: Volatile organic compounds, Drinking water, PCA, Parafac

Link: http://link.springer.com/article/10.1007/s10661-006-9207-8#page-1

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Pinch current limitation effect in plasma focus, Lee, S., Saw, S.H.  2008

The Lee model couples the electrical circuit with plasma focusdynamics, thermodynamics, and radiation. It is used to design and simulate experiments. A beam-target mechanism is incorporated, resulting in realistic neutron yield scaling with pinch current and increasing its versatility for investigating all Mather-type machines. Recent runs indicate a previously unsuspected “pinch current limitation” effect. The pinch current does not increase beyond a certain value however low the static inductance is reduced to. The results indicate that decreasing the present static inductance of the PF1000 machine will neither increase the pinch current nor the neutron yield, contrary to expectations.

Source: Scitation.aip

Document type : Article

Source type : Journal

Link:  http://scitation.aip.org/content/aip/journal/apl/92/2/10.1063/1.2827579

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Single and Multi-Metal Removal by an Environmental Mixed Bacterial Isolate, Sannasi, P., Kader, J., Othman, O., Salmijah, S. 2006

This paper reports the removal of metals from aqueous solution containing Cd(II), Cr(VI), Cu(II), Ni(II) and Pb(II) by a consortia culture (CC) comprising of environmental mixed bacterial culture. The metal removal capability of growing (active) and non-growing (inactive) cell populations at initial total metal concentrations of 100 mg/l in single and multi-metal systems were examined by determining percentage metal removal and specific metal uptakes (q0). The removal and uptake performance of consortia culture in the multi-metal system was 23-58% lower compared to the single metal system (p < 0.05). The efficiency of metal removal in the single metal systems were in the order of : Pb > Cu > Ni > Cd > Cr. Growing cells displayed higher metal removal and uptake capability compared to non-growing cells for all metals tested except for Ni. For both growing and non-growing populations, the order of metal removal was Pb > Cu > Ni > Cd > Cr. TEM studies showed that metals were deposited both intracellularly and extracellularly for the two cell populations. XRF analysis confirmed the identities of the sorbed metals.

Source: Wiley.com

Document type : Paper report

Source type : Book series

Keywords: bacteria, biomass, heavy metal, metal removal, biosorption, bioaccumulation

Link:  http://onlinelibrary.wiley.com/doi/10.1002/9783527611904.ch24/summary

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Computing plasma focus pinch current from total current measurement, Lee, S., Saw, S.H., Lee, P.C.K., Rawat, R.S., Schmidt, H. 2008

The total current Itotal waveform in a plasma focus discharge is the most commonly measured quantity, contrasting with the difficult measurement of Ipinch. However, yield laws should be scaled to focus pinch current Ipinch rather than the peak Itotal. This paper describes how Ipinch may be computed from the Itotal trace by fitting a computed current trace to the measured current trace using the Lee model. The method is applied to an experiment in which both the Itotal trace and the plasma sheath current trace were measured. The result shows good agreement between the values of computed and measured Ipinch.

Source: INTIMAL.edu

Document type : Article

Source type : Journal

Link:http://www.intimal.edu.my/school/fas/UFLF/Papers/PP4Published%20APPLAB9211111501_1.pdf

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Adoption of interorganizational system standards in supply chains: An empirical analysis of RosettaNet standards, Alain, C.Y.L., Ooi, K.-B. 2008

This study aims to empirically examine the factors that affect the adoption of RosettaNet standards. The four factors examined in this study are partners’ power, trust, products’ characteristics, and government influence.

Source: Emeraldinsight

Document type : Research paper

Source type : Book series

Keywords:  Standards, Data analysis, Electronic commerce, Malaysia

Link: http://www.emeraldinsight.com/doi/pdfplus/10.1108/02635570810868371

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Numerical experiments on plasma focus pinch current limitation, Lee, S., Lee, P., Saw, S.H., Rawat, R.S. 2008

Contrary to the general expectation that performance of a plasma focus would progressively improve with progressive reduction of its static inductance Lo, a recent paper suggests that there is in fact an optimum Lo below which although the peak total current increases progressively the pinch current and consequently the neutron yield of that plasma focus would not increase, but instead decreases. This paper describes the numerical experiments and results that led to this conclusion.

Sources: IOPscience

Document type : Research paper

Source type : Book series

Link: http://iopscience.iop.org/0741-3335/50/6/065012/pdf/0741-3335_50_6_065012.pdf

 

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Adaptive network fuzzy inference system (ANFIS) handoff algorithm

Foong, K.C., Chee, C.T., Wei, L.S. 2009

 

Mobility management in the heterogeneous environment demands different design approach, especially in the handoff decision. This is to fulfill the different requirements of different segments especially in the hybrid satellite and terrestrial scenario. There are many works done to replace the traditional handoff algorithm such as hysteresis and fuzzy logic based handoff algorithm. The fuzzy handoff algorithm proposed by earlier work is not optimized and required constant attention from the human experts. This paper proposes a newer approach using adaptive network fuzzy inference system (ANFIS) where the training element is incorporated into the existing fuzzy handoff algorithm

 

Source: IEEE

Document type: Article

Source type: Journal

Keywords: Computer and communication

Link:  http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5189770

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Performance evaluation of shape adaptive discrete wavelet transform based magnetic resonance images coding

Suresh, G.R., Sudha, S., Sukanesh, R. 2009

 

Region based coding is an important feature in todaypsilas image coding techniques as it follows different regions of the image will be encoded at different bit rates and hence at different qualities rather than encoding the entire image with a single quality constraints. This paper evaluates the features of using shape adaptive wavelet transform for the region based coding of the brain magnetic resonance images, in which the brain part will be encoded with more importance than the background. Shape adaptive discrete wavelet transform (SA-DWT) can transform the regions of interest and the background on the images independently and the coefficients can be encoded by using the SPIHT coding at different levels. This algorithm was compared with the existing wavelet based coding techniques and a better PSNR was achieved for the same bit rate by reconstructing the region of interest with high quality than the background

 

Source: IEEE

Document type: Proceeding

Source type: Conference paper

Keywords: SPIHT, Computer and communication

Link: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5189767

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The performance of tapered feed network and quarter-wavelength transformer feed network at KU-Band

Fat, L.T., Mahadi, W.N.L., Soin, N. (2009)

 

Abstract: This paper presents the performance of 4??4 array tapered microstrip feed network and quarter-wavelength transformer feed network at KU-Band. The paper shows the comparison of S11 and VSWR parameters between two feed networks at 15 GHz. ADS2008 simulation software was used to present the useful results on both the networks at 15 GHz.

 

Keywords: microwave spectraantenna feedsmicrostrip antenna arraysfrequency 15 GHztapered feed network

Document type: Conference paper

Sources type: Book series

Sources: IEEE

Link: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5412089

______________________________________________________________________________________________________

 

Effective watermarking of digital audio and image using matlab technique

Subbarayan, S., Ramanathan, S.K. (2009)

 

Abstract: Watermarking is a technique which allows an individual to add hidden copyright notices or other verification messages to digital audio, video, or image signals and documents. In our proposal, for Audio Watermarking, a Watermark is encrypted using RSA Algorithm and is embedded on the audio file using LSB technique. LSB technique is an old technique which is not very robust against attacks. Here, in audio watermarking we have embedded the encrypted watermark on the audio file, due to which removal of the watermark becomes least probable. This would give the technique a very high robustness. In the retrieval, the embedded watermark is retrieved and then decrypted. This method combines the robustness of Transform domain and simplicity of spatial domain methods. For image Watermarking, DWT technique is used. DWT technique is used in Image watermarking. Here, we have embedded the watermark in the image as a pseudo-noise sequence. This gives a remarkable security to the image file as only if the exact watermark is known can the embedded watermark be removed from the watermarked image.

 

Keywords: Cryptography, Data mining, Discrete wavelet transforms, Educational institutions

Machine vision, Pixel, Protection, Public key, Robustness, Watermarking

Document type: Conference paper

Sources type: Book series

Sources: IEEE

Link: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5381136

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Predicate reference and navigation in ORM

Halpin, T. (2009)

 

Abstract: A conceptual schema of an information system specifies the fact structures of interest as well as related business rules that are either constraints or derivation rules. The sole data structure used in fact-oriented modeling approaches is the fact type, which may be understood as a set of typed predicates. In spite of the central role played by predicates in fact-orientation, several issues need to be resolved before their full potential can be fully realized. This paper identifies a number of these issues relating to predicate reference and navigation, and proposes some solutions. Specific issues addressed include predicate disambiguation and formalization, role navigation, and automated verbalization of predicate paths. While the discussion focuses largely on Object-Role Modeling (ORM), many of the issues discussed are also relevant to other fact-oriented approaches, such as Cognition enhanced Natural Information Analysis Method (CogNIAM) and the Semantics of Business Vocabulary and Business Rules approach (SBVR), as well as attribute-based approaches like Entity Relationship modeling and the Unified Modeling Language.

 

Keywords: Electronics, Telecommunications, IT & Software

Document type: Article

Sources type: Book series

Sources: Springer.com

Link: http://link.springer.com/chapter/10.1007/978-3-642-05290-3_88

______________________________________________________________________________________________________

 

FORML 2

Halpin, T., Wijbenga, J.P. (2010)

 

Abstract: A conceptual schema of an information system specifies the fact structures of interest as well as the business rules that apply to the business domain being modeled. These rules, which may be complex, are best validated with subject matter experts, since they best understand the business domain. In practice, business domain experts often lack expertise in the technical languages used by modelers to capture or query the information model. Controlled natural languages offer a potential solution to this problem, by allowing business experts to validate models and queries expressed in language they understand, while still being executable, with automated generation of implementation code. This paper describes FORML 2, a controlled natural language based on ORM 2 (second generation Object-Role Modeling), featuring rich expressive power, intelligibility, and semantic stability. Design guidelines are discussed, as well as a prototype implemented as an extension to the open source NORMA (Natural ORM Architect) tool.

 

Keywords: Finance, Business, Banking

Document type: Conference paper

Sources type: Book series

Sources: Springer.com

Link: http://link.springer.com/chapter/10.1007/978-3-642-13051-9_21#page-1

______________________________________________________________________________________________________

 

Object-role modeling: Principles and benefits

Halpin, T. (2010)

 

Abstract: Object-Role Modeling (ORM) is an approach for modeling and querying information at the conceptual level, and for transforming ORM models and queries to or from other representations. Unlike attribute-based approaches such as Entity-Relationship (ER) modeling and class modeling within the Unified Modeling Language (UML), ORM is fact-oriented, where all facts and rules are modeled in terms of natural sentences easily understood and validated by nontechnical business users. ORM’s modeling procedure facilitates validation by verbalization and population with concrete examples. ORM’s graphical notation is far more expressive than that of ER diagrams or UML class diagrams, and its attribute-free nature makes it more stable and adaptable to changing business requirements. This article explains the fundamentals of ORM, illustrates some of its advantages as a data modeling approach, and outlines some recent research to extend ORM, with special attention to mappings to deductive databases.

 

Keywords: Information system

Document type: Article

Sources type: Journal

Sources: Igi-global

Link:  http://www.igi-global.com/article/object-role-modeling/40952#article-list

______________________________________________________________________________________________________

 

Pinch current and soft x-ray yield limitations by numerical experiments on nitrogen plasma focus

Akel, M., Al-Hawat, S., Lee, S. (2010)

 

Abstract: The modified version of the Lee model code RADPF5-15a is used to run numerical experiments with nitrogen gas, for optimizing the nitrogen soft X-ray yield on PF-SY1. The static inductance L 0 of the capacitor bank is progressively reduced to assess the effect on pinch current I pinch. The experiments confirm the I pinch, limitation effect in plasma focus, where there is an optimum L 0 below which although the peak total current, I peak, continues to increase progressively with progressively reduced inductance L 0, the I pinch and consequently the soft X-ray yield, Ysxr, of that plasma focus would not increase, but instead decreases. For the PF-SY1 with capacitance of 25 μF, the optimum L 0 = 5 nH, at which I pinch = 254 kA, Ysxr = 5 J; reducing L 0 further increases neither I pinch nor nitrogen Ysxr. The obtained results indicate that reducing the present L 0 of the PF-SY1 device will increase the nitrogen soft X-ray yield.

 

Keywords: Plasma focus SY1, Pinch current limitation, Soft X-ray, Nitrogen gas, Lee model RADPF5.15a

Document type: Article

Sources type: Journal

Sources: Springer.com

Link:  http://link.springer.com/article/10.1007/s10894-009-9238-6

__________________________________________________________________________________________________________________

 

Numerical experiments providing new insights into plasma focus fusion devices

Lee, S., Saw, S.H. (2010)

 

Abstract: Recent extensive and systematic numerical experiments have uncovered new insights into plasma focus fusion devices including the following: (1) a plasma current limitation effect, as device static inductance is reduced towards very small values; (2) scaling laws of neutron yield and soft x-ray yield as functions of storage energies and currents; (3) a global scaling law for neutron yield as a function of storage energy combining experimental and numerical data showing that scaling deterioration has probably been interpreted as neutron ‘saturation’; and (4) a fundamental cause of neutron ‘saturation’. The ground-breaking insights thus gained may completely change the directions of plasma focus fusion research.

 

Keywords: Plasma focus; numerical experiments; scaling laws; neutron saturation

Document type: Article

Sources type: Journal

Sources: Energies

Link: http://www.mdpi.com/1996-1073/3/4/711

__________________________________________________________________________________________________________________

 

In situ determination of the static inductance and resistance of a plasma focus capacitor bank

Saw, S.H., Lee, S., Roy, F., Chong, P.L., Vengadeswaran, V., Sidik, A.S.M., Leong, Y.W., Singh, A. (2010)

 

 

Abstract:
The static (unloaded) electrical parameters of a capacitor bank are of utmost importance for the purpose of modeling the system as a whole when the capacitor bank is discharged into its dynamic electromagnetic load. Using a physical short circuit across the electromagnetic load is usually technically difficult and is unnecessary. The discharge can be operated at the highest pressure permissible in order to minimize current sheet motion, thus simulating zero dynamic load, to enable bank parameters, static inductanceL0, and resistancer0 to be obtained using lightly damped sinusoid equations given the bank capacitanceC0. However, for a plasma focus, even at the highest permissible pressure it is found that there is significant residual motion, so that the assumption of a zero dynamic load introduces unacceptable errors into the determination of the circuit parameters. To overcome this problem, the Lee model code is used to fit the computed current trace to the measured current waveform. Hence the dynamics is incorporated into the solution and the capacitor bank parameters are computed using the Lee model code, and more accurate static bank parameters are obtained.

 

Keywords: Electric measurements, Inductance, High pressure, Capacitors, Plasma focus

Document type: Article

Sources type: Journal

Sources: scitation.aip

Link: http://scitation.aip.org/content/aip/journal/rsi/81/5/10.1063/1.3429207

______________________________________________________________________________________________________

 

Numerical experiments on oxygen soft X-ray emissions from low energy plasma focus using Lee model

Akel, M., Al-Hawat, Sh., Saw, S.H., Lee, S. (2010)

 

Abstract: The X-ray emission properties of oxygen plasmas are numerically investigated using corona plasma equilibrium model. The Lee model is here modified to include oxygen in addition to other gases. It is then applied to characterize the Rico Plasma Focus (1 kJ), finding a oxygen soft X-ray yield (Ysxr) of 0.04 mJ in its typical operation. Keeping the bank parameters and operational voltage unchanged but systematically changing other parameters, numerical experiments were performed finding the optimum combination of pressure = 3 Torr, anode length = 1.5 cm and anode radius = 1.29 cm. The optimum Ysxr was 43 mJ. Thus we expect to increase the oxygen Ysxr of PF-1 kJ thousand-fold from its present typical operation; without changing the capacitor bank, merely by changing the electrode configuration and operating pressure. The modified version of the Lee model code is also used to run numerical experiments with oxygen gas, for optimizing the oxygen soft X-ray yield on the new plasma focus device PF-SY2 (2.8 kJ). The static inductance L0 of the capacitor bank is progressively reduced to assess the effect on pinch current Ipinch. The experiments confirm the Ipinch, limitation effect in plasma focus, where there is an optimum L0 below which although the peak total current, Ipeak, continues to increase progressively with progressively reduced inductance L0, the Ipinch and consequently the soft X-ray yield, Ysxr, of that plasma focus would not increase, but instead decreases. The obtained results indicate that reducing the present L0 of the PF-SY2 device will increase the oxygen soft X-ray yield till the maximum value after that the Ysxr will decrease with Ipinch decreasing.

 

Keywords: Low energy plasma focus, Soft X-ray, Oxygen gas, Lee Model RADPF5.15 K

Document type: Article

Sources type: Journal

Sources: springer.com

Link: http://link.springer.com/article/10.1007/s10894-009-9262-6

______________________________________________________________________________________________________

 

Mapping ORM to datalog: An overview

Halpin, T., Curland, M., Stirewalt, K., Viswanath, N., McGill, M., Beck, S. (2010)

 

Abstract: Optimization of modern businesses is becoming increasingly dependent on business intelligence and rule-based software to perform predictive analytics over massive data sets and enforce complex business rules. This has led to a resurgence of interest in datalog, because of its powerful capability for processing complex rules, especially those involving recursion, and the exploitation of novel data structures that provide performance advantages over relational database systems. ORM 2 is a conceptual approach for fact oriented modeling that provides a high level graphical and textual syntax to facilitate validation of data models and complex rules with nontechnical domain experts. DatalogLB is an extended form of typed datalog that exploits fact-oriented data structures to provide deep and highly performant support for complex rules with guaranteed decidability. This paper provides an overview of recent research and development efforts to extend the Natural ORM Architect (NORMA) software tool to map ORM models to DatalogLB.

 

Keywords: Computer Communication Networks, Information Systems Applications (incl.Internet), Software Engineering, Information Storage and Retrieval, Artificial Intelligence (incl. Robotics), Programming Techniques

Document type: Article

Sources type: Book series

Sources: Springer.com

Link: http://link.springer.com/chapter/10.1007%2F978-3-642-16961-8_72

______________________________________________________________________________________________________

 

A proposal for folding in ORM diagrams

Morgan, T. (2010)

 

Abstract: Object Role Modeling (ORM) can be used to produce conceptual models of any scale. Although small examples are often used to illustrate specific points, it is equally possible to produce large models covering extensive business domains. To help users navigate around a large model, the ORM diagram is typically split over several virtual pages. This gives a fairly coarse granularity and it is difficult for users to change the page structure to meet some temporary viewing need. This paper describes an alternative approach that allows objects of lesser interest to be temporarily ’folded’ away and ’unfolded’ when required. The folding and unfolding can be dynamically controlled by the user, but operates under the control of specific algorithms. Some possible algorithms are discussed and illustrated with examples, and a number of usability issues are raised.

 

Keywords: Computer Communication Networks, Information Systems Applications (incl.Internet), Software Engineering, Information Storage and Retrieval, Artificial Intelligence (incl. Robotics), Programming Techniques

Document type: Article

Sources type: Book series

Sources: Springer.com

Link: http://link.springer.com/chapter/10.1007/978-3-642-16961-8_69

____________________________________________________________________________________________________

 

Structural aspects of data modeling languages

Halpin, T. (2011)

 

Abstract: A conceptual data model for an information system specifies the fact structures of interest as well as the constraints and derivation rules that apply to the business domain being modeled. The languages for specifying these models may be graphical or textual, and may be based upon approaches such as Entity Relationship modeling, class diagramming in the Unified Modeling Language, fact orientation (e.g. Object-Role Modeling), Semantic Web modeling (e.g. the Web Ontology Language), or deductive databases (e.g. datalog). Although sharing many aspects in common, these languages also differ in fundamental ways which impact not only how, but which, aspects of a business domain may be specified. This paper provides a logical analysis and critical comparison of how such modeling languages deal with three main structural aspects: the entity/value distinction; existential facts; and entity reference schemes. The analysis has practical implications for modeling within a specific language and for transforming between languages.

 

Keywords: Finance, Business & Banking

Document type: Article

Sources type: Book series

Sources: Springer.com

Link: http://link.springer.com/chapter/10.1007/978-3-642-21759-3_31

 

 

 

 

 

 

 

 

 

 

 

 

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