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Gurun, Turkey

Istanbul Bilgi University is a private university in Istanbul, Turkey. According to the university webpage, The Bilgi Education and Culture Foundation was founded on 31 October 1994 in Istanbul in accordance with the following provision of the Turkish Civil Law: “To found and operate educational institutions and foundation based higher education institutions of every degree and quality and provide teaching in foreign languages, social science, science, and technology, to conduct scientific and cultural research, to found and operate museums that aim to protect the country’s cultural heritage, to conduct seminars, briefings, conferences, and similar gatherings to develop the country’s cultural position, and to provide aid or financial aid to people and corporations that conduct cultural activities.” In 1994, a precursor to the University was the Istanbul School of International Studies, operated in partnership with Portsmouth University and the London School of Economics offering courses in Business Administration, International Relations, Economics, and LSE Economics programs. Istanbul Bilgi University opened in earnest in 1996. The university is recognized as a pioneer in providing a liberal arts-oriented curriculum in Turkey. Istanbul Bilgi University joined Laureate International Universities in 2006 and is one of the largest private universities in the country.Istanbul Bilgi University ranks third among private foundation universities in Turkey for its undergraduate placement according to the 2011 National Student Selection and Placement Center and is ranked among the top 10 institutions of higher education in Turkey, according to Webometrics. Its law school is ranked one of the nation's top three. Bilgi faculty and alumni have been honored with World Bank and OECD Global Development Learning Network recognition, American Academy of Achievement Award, Cannes Lions Young Entrepreneurs Award, and Restfest Film and Digital Arts Festival Award. BILGI's Dolapdere campus received the 2002 "Structure and Life Architecture Award" and the 2005 "European Award for Steel Structure."On February 10, 2009, Istanbul Bilgi University announced that it would join the Laureate International Universities network. In Turkish, Bilgi means knowledge. Wikipedia.

Schmidbauer H.,Istanbul Bilgi University | Rosch A.,Munich University of Applied Sciences
Energy Economics | Year: 2012

Several times a year, OPEC hosts conferences among its members to agree on further oil production policies. Prior to OPEC conferences, there is usually rampant speculation about which decision concerning world oil production levels (no change, increase, or cut) will be announced. The purpose of our investigation is to assess the impact of OPEC announcements on expectation and volatility of daily oil price changes (returns).We modify dummy variables indicating the day of an OPEC announcement to reflect a certain pattern of impact on return expectation and volatility. A combination of regression and GARCH models can then differentiate between pre- and post-announcement effects, and distinguish between the three kinds of OPEC decisions. We find evidence for a post-announcement effect on expectation, which is negative in the case of a cut decision and positive in case of an increase or maintain decision, while there is a positive pre-announcement effect on volatility, which is strongest in the case of a cut decision. © 2012 Elsevier B.V. Source

Erdil D.C.,Istanbul Bilgi University
Peer-to-Peer Networking and Applications | Year: 2012

Resource scheduling in large-scale distributed systems, such as grids and clouds, is difficult due to the size, dynamism, and volatility of resources. These resources are eclectic and autonomous, and may exhibit different usage policies, levels of participation, capabilities, local load, and reliability. Moreover, applications are likely to exhibit various patterns and levels, and distributed resources may organize into various different overlay topologies for information and query dissemination. Researchers have proposed a wide variety of approaches and policies for mapping offered load onto resources and for solving the various component parts of the scheduling problem. However, production clouds and grids may be underutilized, and may not exhibit the load to effectively characterize all of the scheduling system inputs. The composition of large-scale systems is also changing, potentially to include more individual and peer-to-peer resources. These factors will influence the effectiveness of proposed scheduling solutions. Therefore, a simulation environment is necessary to study different approaches under different scenarios, especially those that are expected, but that are not currently characteristic of existing systems. This article describes a general-purpose peer-to-peer simulation environment that allows a wide variety of parameters, protocols, strategies and policies to be varied and studied. To provide a proof of concept, utilization of the simulation environment is presented in a large-scale distributed system problem that includes a core model and related mechanisms. In particular, this article presents a definition and possible peer-to-peer solutions for the large-scale scheduling problem. Moreover, this article describes a general simulation model, some policies that can be varied, an implementation, and some sample results. © 2011 Springer Science + Business Media, LLC. Source

Erdil D.C.,Istanbul Bilgi University
Future Generation Computer Systems | Year: 2013

Recent advances in information technology make remote collaboration and resource sharing easier for next generation distributed systems, such as grids and clouds. One common model of study is the convergence of these systems, along with interclouds to a unified global computing resource. Despite similarities between grids and clouds, there are a number of fundamental differences that make this convergence process harder. For example, clouds have inherent administrative boundaries, something which the grid computing paradigm avoided from the early stages of research. Such administrative boundaries primarily affect capabilities of clouds to be interoperable. Moreover, they also negatively affect the possibility of a seamless intercloud federation on the path to convergence. Resource sharing in general and related communication methodologies, such as information dissemination and matchmaking are also integral elements in this convergence process. To help improve the success of distributed cloud resource schedulers, we propose proxies that disseminate information as agent s of dissemination sources. Such proxies can then make information about resource states available at 'distant' clouds, where there may be no direct, or even no indirect control. Moreover, they can make this resource state available more efficiently than where no proxies are used. In particular, with proxies, dissemination overhead is reduced by up to 65% under different scenarios, where existing solutions may not even produce efficient protocols. In addition, proxies help reduce dissemination overhead by 19% on average. Our results also show that randomly selecting proxy nodes perform comparably to other strategies that may select proxies based on particular criteria. © 2012 Elsevier B.V. All rights reserved. Source

Alpaslan Parlakc M.N.,Istanbul Bilgi University
International Journal of Robust and Nonlinear Control | Year: 2010

In this paper, the problem of robust delay-dependent guaranteed cost control for uncertain nonlinear neutral systems with time-varying state delay is investigated. The control law is chosen to be a memoryless type one. Neither any model transformation nor bounding of any cross terms are utilized. The system under consideration may be subjected to both norm-bounded uncertainties and nonlinear parameter perturbations. A delay-dependent sufficient condition is obtained in terms of a matrix inequality for which a cone complementarity problem is introduced to provide a feasible solution set. Two numerical examples have been demonstrated to show the effective application of the proposed method. Copyright © 2009 John Wiley & Sons, Ltd. Source

Parlakci M.N.A.,Istanbul Bilgi University
Asian Journal of Control | Year: 2012

In this paper, a novel delay-dependent bounded real criterion and an improved sufficient condition are derived for the design of an H ∞ state-feedback controller for linear neutral time-delay systems. On the basis of an augmented Lyapunov-Krasovskii functional, a new bounded real lemma is introduced in terms of a convex linear matrix inequality (LMI) condition that can be solved using interior point algorithms. The bounded real lemma is extended to obtain a sufficient condition for the existence of a delay-dependent H ∞ memoryless state-feedback controller. Neither any model transformation nor bounding of any of the cross terms are utilized while deriving the bounded real lemma. Moreover, the use of any free slack matrix variable approach is avoided to a certain extent in order not to increase the complexity of the synthesis problem. A cone complementary nonlinear minimization algorithm is employed to achieve a feasible solution set for the synthesis conditions. Finally, seven numerical examples are given to illustrate the effectiveness of the proposed method. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society. Source

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