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Search Results: 1 - 10 of 198952 matches for " N. Tariq "
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Two-machine flowshop scheduling problem to minimize makespan or total completion time with random and bounded setup times
Ali Allahverdi,Tariq Aldowaisan,Yuri N. Sotskov
International Journal of Mathematics and Mathematical Sciences , 2003, DOI: 10.1155/s016117120321019x
Abstract: This paper addresses the two-machine flowshop scheduling problem with separate setup times to minimize makespan or total completion time (TCT). Setup times are relaxed to be random variables rather than deterministic as commonly used in the OR literature. Moreover, distribution-free setup times are used where only the lower and upper bounds are given. Global and local dominance relations are developed for the considered flowshops and an illustrative numerical example is given.
General solutions of Einstein's spherically symmetric gravitational equations with junction conditions
A. Das,A. DeBenedictis,N. Tariq
Physics , 2003, DOI: 10.1063/1.1621056
Abstract: Einstein's spherically symmetric interior gravitational equations are investigated. Following Synge's procedure, the most general solution of the equations is furnished in case $T^{1}_{1}$ and $T^{4}_{4}$ are prescribed. The existence of a total mass function, $M(r,t)$, is rigorously proved. Under suitable restrictions on the total mass function, the Schwarzschild mass $M(r,t)=m$, implicitly defines the boundary of the spherical body as $r=B(t)$. Both Synge's junction conditions as well as the continuity of the second fundamental form are examined and solved in a general manner. The weak energy conditions for an \emph{arbitrary boost} are also considered. The most general solution of the spherically symmetric anisotropic fluid model satisfying both junction conditions is furnished. In the final section, various exotic solutions are explored using the developed scheme including gravitational instantons, interior $T$-domains and $D$-dimensional generalizations.
A Study of CAPTCHAs for Securing Web Services
M. Tariq Banday,N. A. Shah
Computer Science , 2011,
Abstract: Atomizing various Web activities by replacing human to human interactions on the Internet has been made indispensable due to its enormous growth. However, bots also known as Web-bots which have a malicious intend and pretending to be humans pose a severe threat to various services on the Internet that implicitly assume a human interaction. Accordingly, Web service providers before allowing access to such services use various Human Interaction Proof's (HIPs) to authenticate that the user is a human and not a bot. Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a class of HIPs tests and are based on Artificial Intelligence. These tests are easier for humans to qualify and tough for bots to simulate. Several Web services use CAPTCHAs as a defensive mechanism against automated Web-bots. In this paper, we review the existing CAPTCHA schemes that have been proposed or are being used to protect various Web services. We classify them in groups and compare them with each other in terms of security and usability. We present general method used to generate and break text-based and image-based CAPTCHAs. Further, we discuss various security and usability issues in CAPTCHA design and provide guidelines for improving their robustness and usability.
Early fault prediction and detection of hydrocephalus shunting system  [PDF]
Abdel Rahman Alkharabsheh, Lina Momani, Waleed Al-Nuaimy, Jafar Ababneh, Tariq Alwada’n, Abeer Hawatmeh
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.63036
Abstract:

Trends of various intracranial pressure (ICP) parameters for high pressure hydrocephalus patients are utilized to detect various shunt faults in their early stages, as well as, to monitor the effect of such faults on shunt performance. A method was proposed to predict the time required for ICP to be abnormal and for the valve to reach full blockage condition. Furthermore, an auto valve schedule updating method is proposed and used to temporarily deal with detected faults until the patient is checked up by his/her physician. The proposed algorithms were evaluated using numerical simulation.

Beyond “Methodological Islamism”? A Thematic Discussion of Muslim Minorities in Europe  [PDF]
Nasar Meer, Tariq Modood
Advances in Applied Sociology (AASoci) , 2013, DOI: 10.4236/aasoci.2013.37039
Abstract: In this discussion we offer an overview of the place of Muslim actors in European scholarship. We especially focus on the second and subsequent generations of European Muslims, and how future research agendas could conceptualise the relationship between contemporary Muslim identity and citizenship regimes in Europe. We explore the way in which our understanding is formed by a concern with socio- economic processes, cultural adaptations and civic status. We include questions of citizenship and “difference”, and the extent to which there has been a re-imagining and re-forming of national collectivities in the face of Muslim claims-making. By claims-making we invoke a further register which centres on the creation of a Muslim infrastructure, perhaps through modes of religious pluralism (or opposition to it), and how this interacts with prevailing ideas that to greater and lesser extents inform public policies e.g., multiculturalism, interculturalism, cohesion, secularism, or Leitkulture, amongst others. While the latter register focuses more on nation-state politics, there is a further transnational dimension in the Muslim experience in Europe, and this assumes an important trajectory in the ways discussed. It is argued that Muslim identities in Europe contain many social layers that are often independent of scriptural texts; such that the appellation of “Muslim” can be appropriated without any unanimity on Islamic matters. We conclude by observing how this point is understudied, and as a consequence the dynamic features of Muslims’ leadership in Europe remain unexplored.a
No-Wait Flowshops to Minimize Total Tardiness with Setup Times  [PDF]
Tariq Aldowaisan, Ali Allahverdi
Intelligent Control and Automation (ICA) , 2015, DOI: 10.4236/ica.2015.61005
Abstract: The m-machine no-wait flowshop scheduling problem is addressed where setup times are treated as separate from processing times. The objective is to minimize total tardiness. Different dispatching rules have been investigated and three were found to be superior. Two heuristics, a simulated annealing (SA) and a genetic algorithm (GA), have been proposed by using the best performing dispatching rule as the initial solution for SA, and the three superior dispatching rules as part of the initial population for GA. Moreover, improved versions of SA and GA are proposed using an insertion algorithm. Extensive computational experiments reveal that the improved versions of SA and GA perform about 95% better than SA and GA. The improved version of GA outperforms the improved version of SA by about 3.5%.
Impact of the Fermeuse Wind Farm on Newfoundland Grid  [PDF]
Seyedali Meghdadi, Tariq Iqbal
Energy and Power Engineering (EPE) , 2015, DOI: 10.4236/epe.2015.76025
Abstract: This paper aims to study the impact of the Fermeuse wind farm (46°58'42\"N 52°57'18\"W) through simulation of wind turbines driven by doubly fed induction generator which feed AC power to the isolated utility grid of Newfoundland. The focus is on the determination of both voltage and system stability constraints. The complete system is modeled and simulated in Matlab Simulink environment.
A Comparison of Saudi Building Code with 1997 UBC for Provisions of Modal Response Spectrum Analysis Using a Real Building  [PDF]
Tariq M. Nahhas
Open Journal of Earthquake Research (OJER) , 2017, DOI: 10.4236/ojer.2017.62006
Abstract: The study uses an actual building to compare the modal response spectrum analysis results of Saudi Building Code (SBC) and the 1997 Uniform Building Code (UBC) used in Saudi Arabia before the introduction of SBC. A sample of four buildings with reported analysis of comparison between IBC and UBC is taken for confirming the comparison. Eight sample places from SBC map for Saudi Arabia together with two sample places of high seismic activity in USA were taken for the comparisons. The study used software package ETABS in this study for modeling and analysis. The results are dissimilar from the comparisons reported for test places of USA. It is concluded that at most places SBC base shear is higher for both ELFP and MRSA. However, the results cannot be generalized and considered always right. The same is factual for overturning moments. Consequently, we cannot report that SBC is more conservative than UBC for all scenarios.
Stabilization of Bilateral Progressive Rheumatoid Corneal Melt with Infliximab
Sheelah F. Antao,Tariq Ayoub,Hasan Tahir,Dipak N. Parmar
Case Reports in Ophthalmological Medicine , 2012, DOI: 10.1155/2012/173793
Abstract: Purpose. To report the use of infliximab in the rapid stabilization of a case of progressive, bilateral rheumatoid peripheral ulcerative keratitis (PUK) that failed to respond to conventional immunosuppressive therapy.Methods. A single interventional case report.Results. A patient with rheumatoid arthritis presented with bilateral PUK following a 2-month history of ocular discomfort and redness. His systemic prednisolone (PDN) and methotrexate (MTX) were increased and, despite an initial favorable response, bilateral recurrent corneal perforations ensued. Both eyes underwent cyanoacrylate glue repair, amniotic membrane transplantation (AMT), and penetrating keratoplasty (PKP). Recurrence of the disease and bilateral perforations of the second PKP in both eyes prompted administration of intravenous infliximab immediately after the fourth PKP. The disease activity rapidly settled in both eyes, and at eighteen-month followup, after 12 infliximab infusions, the PUK remains quiescent with no further graft thinning or perforation. Conclusion. Infliximab can be used to arrest the progression of severe bilateral rheumatoid PUK in cases that are refractory to conventional treatment.
Detection of Some Active Compounds in Aqueous and Ethanolic Extracts of Iraqi Propolis and Examine Their Antibacterial Effects
Tariq N. Musa,Nidhal M. Salih,Wisam S. Ulaiwi
Pakistan Journal of Nutrition , 2012,
Abstract: The crude Iraqi propolis has been collected from an area surrounding by eucalyptus trees at the west of Baghdad city. The aqueous and ethanolic total soluble solids of crude Iraqi propolis were found to be 13.9 and 34.5% respectively. The quantitatively detection of propolis extract refer to the presence of phenolic compounds (such as flavonoids) as the mainly active components. Spectrophotometric analysis was used to determine flavonoids in the local propolis extracts. Flavones and flavonols were determined using aluminum chloride and expressed as quercetin equivalent and were found 2.1 and 6.71% in aqueous and ethanolic extracts respectively. The flavanones were determined using 2, 4-dinitrophenyl hydrazine and expressed as naringenin and found to represent 4.27 and 13.65% of aqueous and ethanolic extracts. Total phenolic, free phenolic and tannin compounds were determined in crude propolis using Lowenthal-Proctor method and were found 9.98, 8.32 and 1.66% by using aqueous extraction and 24.80, 22.72 and 2.08% by ethanol extraction respectively. The inhibitory action of aqueous and ethanolic extract with concentrations 120, 240…to 1200 and 2000, 2500…to 4000 ppm were examined against gram-positive bacteria (Staphylococcus aureus, Bacillus cereus and Bacillus stearothermophilus) and gram-negative bacteria (Escherichia coli, Salmonella enteritidis and Pseudomonas fluorescens). The ethanolic extract of local propolis showed highly inhibitory percentages (up to 83.80% against gram-negative and 87.80% against gram-positive) as compared with aqueous extract (70.58% against gram-negative and 59.59% against gram-positive).
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