Muscat, Oman

Middle East College

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We have performed the numerical simulation of the perturbed relativistic torus around the black hole by solving the general relativistic hydrodynamics equations on the equatorial plane. We have monitored the different simple models by applying the radial and angular velocity perturbations to the steady state torus around the black hole. The instabilities are triggered by adding the subsonic velocity fields over the radial and angular velocities of the stable torus. We have found the disk instability so-called the Papaloizou-Pringle instability and excited modes of the Quasi-Periodic Oscillations (QPOs) in the thin disk approximation case. The significant oscillations and oscillation modes in the mass accretion rates are observed around the rotating black hole with a radial velocity perturbation. The angular velocity perturbation can not create the significant variations and QPOs in the nonselfgravitating relativistic torus around the nonrotating and rotating black holes. The results observed from the radial velocity perturbation might be used to explain the Papaloizou-Pringle instability observed in NGC 1068. © 2017 Tübitak.


Kuzey C.,Murray State University | Uyar A.,Middle East College
Journal of Cleaner Production | Year: 2017

The purpose of this study is to investigate the factors that impact (1) Global Reporting Initiative-based sustainability reporting, (2) the adoption of assurance statements in sustainability reports, and (3) the application levels of sustainability reports. Moreover, (4) the paper examines whether sustainability reporting is value relevant or not based upon the sample provided by 297 Turkish publicly traded companies at the Borsa Istanbul. The findings revealed a growing awareness of Global Reporting Initiative -based sustainability reporting among the investigated corporations, and an improving trend in report quality; however, having sustainability reports assured by an independent verifier is not widespread among them. Using the basis of ten formulated hypotheses, the empirical evidence yielded significant results, which explain the driving factors behind sustainability reporting. Moreover, the results confirmed that sustainability reporting is value relevant. © 2016 Elsevier Ltd


Senthilkumar R.D.,Middle East College
IEEE Global Engineering Education Conference, EDUCON | Year: 2017

An attempt has been made to study the effectiveness of concept maps in physics education through quasi-experimental design. The post-test is used as a measuring instrument and the post-test scores are statistically analysed. The results of Levene's test and t-test reveal that mean of post-test scores of the experimental and control groups are statistically significant. This confirms the Alternate Hypothesis that students who studied using concept maps (experimental group) attained higher learning compared to the students who did not use the concept maps (control group). The learner achievement score reveals that 17.7 % higher learning has been attained by experimental group compared with control group. Questionnaires were used to know the students perceptions on the use of concept maps. The results of questionnaire analysis showed that students find concept maps are useful in teaching and learning. Further details of this study are discussed in the article. © 2017 IEEE.


In this paper, a numerical study of the dynamic of the non-self-gravitating, unmagnetized, non-axisymmetric, and rotating the torus around the non-rotating black hole is presented. We investigate the instability of the rotating torus subject to perturbations presented by increasing or decreasing the angular velocity of the stable torus. We have done, for the first time, an extensive analysis of the torus dynamic response to the perturbation of the angular velocity of the stable torus. We show how the high, moderate, and low values of the perturbations affect the torus dynamic and help us to understand the properties of the instability and quasi-periodic oscillation (QPO). Our numerical simulations indicate the presence of Papaloizou-Pringle instability (PPI) with global m = 1 mode and QPOs for the moderate and lower values of the perturbations on the angular velocity of the stable torus. Furthermore, with the lower values of the perturbations, the torus can lead to a wiggling initially and then PPI is produced in it. Finally, the matter of the torus would be dissipated due to the presence of a strong torque. © 2017 World Scientific Publishing Company.


Keceli Y.,Middle East College
Maritime Policy and Management | Year: 2016

A multi-purpose cargo terminal in a seaport contains necessary infrastructure to handle different types of cargo, such as container, dry bulk, general bulk, and Ro-Ro. Since such terminals generally have dedicated areas and equipment for different types of cargo, berth, and yard operations for each type of cargo can be considered separate. On the other hand, trucks that carry all types of cargo use the same gate structure to enter and leave the terminal. Therefore, a method to superimpose the traffic that is caused by different types of cargo is needed for the planning of gate investments and operations. Consequently, this paper has developed a simulation model for a multi-purpose terminal to estimate the gate traffic and determine the necessary gate infrastructure, so that it can be used as a decision support tool for terminal planners and operational managers. © 2016 Informa UK Limited, trading as Taylor & Francis Group


Asdemir K.,Middle East College
Information Technology and Management | Year: 2011

We develop an infinite horizon alternative-move model of the unique second-price sponsored search auction. We use this model to explain two distinguishable bidding patterns observed in our bidding data: bidding war cycle and stable bid. With examples, we show that only a small portion of the value generated may be extracted by search engines, if advertisers are engaged in bidding war cycles. Finally, we show the impact of auction design on advertiser bids and search engine revenue. © 2010 Springer Science+Business Media, LLC.


Meier D.,Middle East College
British Journal of Middle Eastern Studies | Year: 2014

How did the Palestinian Resistance build the key transnational figure of the fidâ'i and why did South Lebanon play a major role in this process? Assessing the hypothesis of the 'Lebanonisation' of this symbol of the Palestinian national struggle, this article will examine the role and the symbol of the fidâ'i in the context of Lebanon in the 1970s, through an analysis of the actions of the fidâ'iyyn and the values and ethics that fidâ'iyyn were supposed to embody. Drawing on interviews with former fidâ'iyyn and previous research on the topic, I will consider the two dimensions of the presence of the fidâ'iyyn: first, their location in South Lebanon and how this borderland became a significant part of their struggle in the political consciousness of the marginalised local population; and second, the nature of the symbol they began to represent for Lebanese groups, especially those who became involved in Resistance groups like the student brigade (al-katibe al-tullabiyya). © 2014 British Society for Middle Eastern Studies.


Dawood M.H.,Middle East College
2016 3rd MEC International Conference on Big Data and Smart City, ICBDSC 2016 | Year: 2016

Sustainable buildings with minimum energy consumption and with less negative impact to environment becomes an important goal of public and private organization all over the world. On the other hand, energy cost has a high contribution with the building Life Cycle Cost (LCC) for the owners. Subsequently, reducing energy consumption by selecting the best design options during the initial stages of any residential project is one of the key factors to that issue. The target of the proposed framework is to find the optimal design that gives a minimum life cycle cost over the building life span. The integration between Building Information Modeling (BIM) and Genetic Algorithm (GA) is used to reach the near-optimal solution. BIM is the simulation tool to generate the building design and dynamically analysis for the energy consumption of the house. The role of GA is to reach the solution by setting the effective variables and use a measurable objective function with proper constraints. The proposed model automatically identifies the most suitable house components to reach the minimum LCC during the design stage. Parametric programming language is used to facilitate interoperability between BIM and the other components of the model. © 2016 IEEE.


Ismail A.,Middle East College
2016 3rd MEC International Conference on Big Data and Smart City, ICBDSC 2016 | Year: 2016

Cities generate huge volumes of data that are diverse in nature and are generated on a daily basis. These data types involve environment, energy, transport and economic data. This includes structured and unstructured data which needs to be processed and understood to become valuable. By managing and analyzing big data, smart cities will be able to tackle formidable problems and ascend to a state where better and more informed decisions will be taken resulting in enhanced economic and environment outcomes leading to better quality of life. This paper reviews utilizing big data in cities by using big data analytics as a solution for smart cities and conceiving related issues being faced. © 2016 IEEE.


Samuel S.S.I.,Middle East College
2016 3rd MEC International Conference on Big Data and Smart City, ICBDSC 2016 | Year: 2016

The Internet of Things with its enormous growth widens its applications to the living environment of the people by changing a home to smart home. Smart home is a connected home that connects all type of digital devices to communicate each other through the internet. These devices form a home area network where communications are enabled by different protocols. As these devices are designed by different companies with different standards and technologies there is a problem exists in their connectivity. This paper aims at describing the wireless standards used in home network and how these protocols face the connectivity challenges in the smart home network. © 2016 IEEE.

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