Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14517/19

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Citation Count: 2
Your neun career: E-learning process manager
(2004) Yamamoto,G.T.
Because e-learning necessitates working with many disciplines, it forms a new ground for training, requiring the cooperation of people with different capabilities and qualifications. The work starts with creating the demand. To break any resistance, identify the organization's opinion leaders and set them into action to spread the word that e-learning is beneficial and necessary in a world transforming to an information society. Those opinion leaders are called e-learning challengers, and their job is to be knowledgeable about e-learning and make others believe. To help pave the road to e-learning with the least resistance, e-learning balancers ensure that information and technology are provided in harmony. Challengers and balancers work in concert with the creative design team, who handle the technical aspects. Acting as a separate research group, the e-learning market research team should be in contact with learners worldwide, any time - sending questions and discussing issues. The receivers of e-learning, the e-learning knowledge incomers, are in contact with the research group and the creative design team to help construct appropriate programs. As manager, you provide technical, personal, and marketing solutions; a human relations approach; and an open mind to innovation and creativity.
Citation Count: 20
Impacts of divorce on the behavior and adjustment problems, parenting styles, and attachment styles of children: Literature review including Turkish studies
(2005) Sirvanli-Ozen,D.
In recent years, the most dramatic change in family life has been observed in the rising rate of divorce. Especially in Western countries, more than one million children experience parental divorce and this has given rise to studies that seek answers to the questions of what the possible long-term and short-term effects of divorce on children may be and how they can be coped with. In this study, studies in the Western countries and the restricted number of studies in Turkey, which has a very different cultural background, on the possible adverse effects of divorce on children are reviewed with a view to introducing the existing findings to the relevant literature in Turkey. Within this framework, the impact of divorce on children's behaviour and adjustment problems, the parenting styles they perceive and the attachment styles they develop in the different periods of their lives are examined in the given order. While investigating into the possible effects of divorce on children during their childhood and in the later stages of their lives, the possible interaction of divorce with the variables of age, sex, and perceived social support is taken into consideration. As a result, in the light of the research findings of studies conducted both in the Western countries and in Turkey, it is observed that divorce may have detrimental effects on the levels of behaviour and adjustment problems of children, the parenting styles they perceive and the attachment styles they develop, and that these effects may vary depending on the children's sex. age, and the social support they perceive from their environment. On the other hand, another finding obtained from the study indicates that the possible negative impacts of divorce on children may be alleviated provided that favourable conditions are offered to them in the post-divorce period. © 2005 by The Haworth Press. Inc. All rights reserved.
Citation Count: 2
Measuring credit risk of a bank’s corporate loan portfolio using advanced internal ratings base approach
(2006) Teker,S.; Akçay,B.; Turan,M.
The use of technical and advanced approaches in the measurement of credit risk of banks’ portfolios has nowadays become a very hot issue. The most recent technical report issued by the Basel Committee in May 2003 has concentrated heavily on the measurement of credit risk using either foundation or advanced Internal Ratings Base (IRB) approaches. This empirical research study attempts to measure credit risk of a bank’s corporate loan portfolio, including firms from 10 different Turkish sectors. The monthly observations of the total amount of corporate loans and the total amount of corporate loans at default across various sectors are downloaded from the web page of Central Bank of Turkey (CBT) in a period of 1999-2002. This period covers 47 monthly observations since CBT has captured sectoral corporate loans beginning of 1999. Therefore, the observed sectoral default rates are needed to be simulated to obtain a nicely shaped distribution. Monte Carlo simulation is applied for 1,000 times. Based on the simulated default rates, the expected sec-toral default rates are computed. Next, a credit quality rating scale is fitted into sectoral default rates distributions. Finally, the sectoral weights in the whole loan portfolio are multiplied by the expected sectoral default rates matrix, considering cross-sectoral correlations to get the total amount of the bank’s credit risk and capital requirement. It is assumed that sectoral monthly default rates are a good representative of the default risk of a sample bank’s corporate loan portfolio since no publicly available data on any particular bank’s corporate loan portfolio composition exists. Nevertheless, this research may be a good application for measuring the credit risk of banks’ corporate loan portfolios using advanced IRB approach. © 2006, Taylor & Francis Group, LLC. All rights reserved.
Citation Count: 31
The end results of general relativity theory via just energy conservation and quantum mechanics
(Springer/plenum Publishers, 2006) Yarman, Tolga; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
Herein we present a whole new approach that leads to the end results of the general theory of relativity via just the law of conservation of energy (broadened to embody the mass and energy equivalence of the special theory of relativity) and quantum mechanics. We start with the following postulate. Postulate: The rest mass of an object bound to a celestial body amounts less than its rest mass measured in empty space, and this, as much as its binding energy vis-a-vis the gravitational field of concern. The decreased rest mass is further dilated by the Lorentz factor if the object in hand is in motion in the gravitational field of concern. The overall relativistic energy must be constant on a stationary trajectory. This yields the equation of motion driven by the celestial body of concern, via the relationship e(-alpha)/root 1-nu(2)(o)/c(o)(2) = constant, along with the definition alpha = GM/rc(o)(2); here M is the mass of the celestial body creating the gravitational field of concern; G is the universal gravitational. constant, measured in empty space it comes into play in Newton's law of gravitation, which is assumed though to be valid for static masses only; r points to the location picked on the trajectory of the motion, the center of M being the origin of coordinates, as assessed by the distant observer; v(o) is the tangential velocity of the object at r; c(o) is the ceiling of the speed of light in empty space; v(o) and c(o) remain the same for both the local observer and the distant observer, just the same way as that framed by the special theory of relativity. The differentiation of the above relationship leads to GM/r(2)(1 - v(o)(2)/c(o)(2)) = v(o) dv(o)/dr or, via v(o) = dr/dt, GM/r(2) (1- v(o)(2)/c(o)(2)) r//r = d (v) under bar (o)/dt; (r) under bar is the outward looking unit vector along r; the latter differential equation is the classical Newton's Equation of Motion, were v(o), negligible as compared to c(o); this equation is valid for any object, including a light photon. Taking into account the quantum mechanical stretching of lengths due to the rest mass decrease in the gravitational field, the above equation can be transformed into an equation written in terms of the proper lengths, yielding well the end results of the general theory of relativity, though through a completely different set up.
Citation Count: 38
University evaluation-selection: a Turkish case
(Emerald Group Publishing Ltd, 2006) Yamamoto, Gonca
Purpose - The purpose of this study is to examine the university selection criteria of students for better university management with the use of marketing tools. Design/methodology/approach - This study consists of a survey on students attending a foundation university in Turkey. The questionnaire method has been chosen in order to determine the important criteria having an impact on the student views towards university selection. The students had been admitted to a foundation university in the 2005-2006 period when within the same universities various departments were included in the study. Findings - The results indicate student evaluation and selection criteria in this period of time. Practical implications - This paper examines the criteria that affects the selection of students and, in detail the students' point of view towards the university evaluation and selection in Turkey. This will help the university manager's decision making on the marketing tools they use. Originality/value - Selecting a university is a long-term commitment and a very important decision for the high school students and/or graduates. Academic, social, physical factors and facilities are some important criteria for university selection. This study concerns the importance of these criteria in detail.
Citation Count: 0
Virtual environments, virtual works, virtual lives?
(2006) Yamamoto,G.T.; Telli,A.; Featherstone,M.; Borstoff,P.
Technological advances mostly in Internet and mobile technologies affect our lives in myriad ways. Globally, these technologies are used in many environments; the usage of these technologies also creates virtual environments. The concepts of time, place, language and boundaries disappear; many people from different countries and cultures can communicate with each other and work together. However, besides its benefits, working with many different people brings many problems to be solved such as time synchronization, language gaps, and cultural differences. To observe the problems of virtual environments as a case study, a virtual study group has been established between Turkish and American student groups. In this paper, the observations of this group study will be presented. (c) 2006 PICMET.
Citation Count: 9
The relationship between the adolescents' exposure to peer victimization and their age, parental style and self-image;
(2006) Özen,D.Ş.
The objective of this study is to determine whether the age, the perceived parenting style and the self-image of the individual contribute to his/her exposure peer victimization as well as to the prediction of the different types of peer victimization for both girls and boys. The sample of the study consists of 805 students: 381 girls and 484 boys, all of whom study at the second level of private primary education schools and high school's 6th, 7 th, 8th and 10th grades in Istanbul. However, as some of the scales were not filled out properly, hence the sample size decreased to 314 and to 308 for boys and girls respectively. In the study, 'The Peer Victimization Scale' to determine the level of their exposure to peer victimization, 'The Parenting Style Scale' to identify the perceived parenting styles of the subjects and 'The Offer Self-Image Scale' to reveal the self-images of the participants, were used as instruments for data assessing. Results show that the peer victimization both girls and boys encounter at school is significantly influenced by the age, the perceived parenting styles and the self-image of the individual. Findings are discussed within the framework of the related literature.
Citation Count: 1
Business ethics and technology in Turkey: An emerging country at the crossroad of civilizations
(IGI Global, 2006) Yamamoto,G.T.; Karaman,F.
IT ethics cannot be analyzed without assessing business ethics in general and the cultural environment. This study is based on the Turkish case. Turkey lies at the crossroads of civilizations, making it hard to define a generally accepted set of ethical principles. Western, Islamic, and Turkish cultures are in competition with each of them, and a synthesis has not yet been achieved. Therefore, a common identity and common ethical standards cannot be acquired. In fact, such a synthesis could be categorized as a new civilization. This disagreement causes proliferation of unethical behaviors such as the illegal copying of software. The majority of highly educated technical people in Turkey approves of the illegal copying of software, if it is necessitated by the interests of the country. This shows that we have a long way to go to reach global ethical standards, and country-specific differences cannot be eliminated in the short term. © 2007, Idea Group Inc.
Citation Count: 1
Intrusive autobiographical memory and its depressive theme on high depressive symptomatology;
(2006) Tosun,A.
The research investigates the intrusion and depressive content of the autobiographical memory (AM) that associated with depressive self cognition. 493 students from different universities in 2004-2005 academic years participated in the study. Cognition Check List, Depressive Content Evaluation Form, Impact of Event Scale and Beck Depression Inventory were applied. Results showed that, depressives evaluated their own self at the event as more 'worthless', 'unlovable' and 'inefficient'. They evaluated the others at the event as more 'distrustful, 'rejective' and 'unsupportive' and the event as more 'unchangeable' in future than non-depressives. Concerning AM associated with depressive cognition, depressives reported more intrusion of the AM than non-depressives. It is considered that depressive persons ' AM associated with depressive cognition may be a self defining memory. As a result, it is suggested that AM is an important material and context in changing procedure of depressive cognitions in CBT.
Citation Count: 2
Relativistic transformation of force: resolution of apparent paradoxes
(Iop Publishing Ltd, 2007) Kholmetskii, A. L.; Yarman, T.; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
In this paper, we present a resolution of apparent paradoxes formulated in [2] and deal with the relativistic transformation of force.
Citation Count: 6
Apparent paradoxes in classical electrodynamics: relativistic transformation of force
(Iop Publishing Ltd, 2007) Kholmetskii, A. L.; Yarman, T.; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
In this paper, we analyse a number of paradoxical teaching problems of classical electrodynamics, dealing with the relativistic transformation of force for complex macro systems, consisting of a number of subsystems with nonzero relative velocities such as electric circuits that change their shape in the course of time.
Citation Count: 2
Barriers to e-procurement adoption: The Turkish case
(IGI Global, 2007) Yamamoto,G.T.; Karaman,F.
E-procurement practice is not well-established in emerging countries. There are barriers in terms of transportation, financial, telecommunication, and legal infrastructures. Also, a lack of a qualified workforce, cultural barriers, and security problems hinder the development of e-procurement activities. These are not such significant problems in the developed countries. In this study, we examined the Turkish practice. We gave country background information including macroeconomic data and Internet penetration data, and we gave a picture of the current situation of Turkey. We then discussed how these barriers can be overcome in Turkey. Finally, we gave predictions about how m-procurement may alter the situation and its potential for the Turkish market. © 2007, Idea Group Inc.
Citation Count: 38
Integrating Hoshin Kanri and the Balanced Scorecard for strategic management: The case of higher education
(Routledge Journals, Taylor & Francis Ltd, 2007) Asan, Seyda Serdar; Tanyas, Mehmet
This paper suggests a methodology that focuses on the vision and the deployment of strategies throughout the organization by merging Balanced Scorecard and Hoshin Kanri. The authors believe that combining a performance-oriented approach like the Balanced Scorecard with a process-oriented approach like Hoshin Kanri creates synergy. The proposed methodology begins with the selection of strategic objectives according to the Balanced Scorecard perspectives, which is followed by the generation of the strategy map. The developed strategies are then deployed down to implementation plans which are reviewed by Hoshin Kanri, and the outcomes are evaluated by utilizing both. tools. The implementation of the proposed methodology is illustrated based on an Engineering Management Graduate Program (EngMan). Finally, using the proposed methodology, implementation plans for the management of EngMan are realized, facilitating EngMan to attain its vision in the long term.
Citation Count: 2
Fourier-Galerkin domain truncation method for Stokes' first problem with Oldroyd four-constant liquid
(Pergamon-elsevier Science Ltd, 2008) Akyildiz, F. Talay; Vajravelu, K.; Ozekes, H.
Using the Fourier-Galerkin method with domain truncation strategy, Stokes' first problem for Oldroyd four-constant liquid on a semi-infinite interval is studied. It is shown that the Fourier-Galerkin approximations are convergent on the bounded interval. Moreover, an efficient and accurate algorithm based on the Fourier-Galerkin approximations is developed and implemented in solving the differential equations related to the present problem. Also, the effects of non-Newtonian parameters on the flow characteristics are obtained and analyzed. The method developed here is so general that it can be used to study the mathematical models that involve the flow of viscous fluids with shear rate-dependent properties: For example, models dealing with polymer processing, tribology & lubrication, and food processing. (C) 2007 Elsevier Ltd. All rights reserved.
Citation Count: 5
Energy flow in a bound electromagnetic field: resolution of apparent paradoxes
(Iop Publishing Ltd, 2008) Kholmetskii, A. L.; Yarman, T.; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
In this paper, we present a resolution of apparent paradoxes formulated in (Kholmetskii A L 2006 Apparent paradoxes in classical electrodynamics: the energy-momentum conservation law for a bound electromagnetic field Eur. J. Phys. 27 825-38; Kholmetskii A L and Yarman T 2008 Apparent paradoxes in classical electrodynamics: a fluid medium in an electromagnetic field Eur. J. Phys. 29 1127) and dealing with the energy flux in a bound electromagnetic field.
Citation Count: 0
The financial feasibility of the phytoremediation technology: Assessment of remediation by sideritis galatica, poplar and willow
(2008) Sahmurova,A.; Teker,D.
Phytoremediation is a process which uses several plants to remove the pollutants from water and soil to reduce, completely extract, control or immobilize them. The plants used for this reason are referred to as the hyperaccumulators. Metal accumulation can occur in several different families from small annual grass to perennial bushes and trees. For remediation or cleaning of the soils polluted with heavy metals, the ideal plant species are the ones which can produce high amounts of biomass and can accumulate and tolerate the pollutants. In this research, Cd and Zn metals which occurred because of industrial wastes are observed in the roots of Phragmites Australis, Cyperace carex, Sideritis galatica and Compositae cardueae plants in Kucukcekmece region. Among these, Sideritis galatica was found to be the most beneficial plant for remediation. Furthermore, it was observed that the Kucukcekmece region is also suitable for growth of willow and poplar trees. This study includes a financial feasibility analysis that determines the monetary benefit of phytoremediation as well as the environmental advantages. The financial outputs are compared by the net present value model and internal rate of return approaches. © 2008 DEStech Publications, Inc.
Citation Count: 2
The investigation of ground vibration measurements at an agregate quarry in Istanbul-Turkey
(2008) Ozer,U.; Kahriman,A.; Karadogan,A.; Kaya,E.; Acikel,G.; Bicer,S.; Makine / Machinery
In this study, the vibration and air shock measurement results are given in order to evaluate the environmental results of excavation works with explosions executed in the agrega quarry by İlkdal Mining Industry Ltd. Corp. which is working in the borders of Kemerburgaz region of Eyüp county in İstanbul city on producing agrega. The blasting pattern, explosive material charge parameters and vibration measurement results of each blastings are recorded. In the research, the frequency and particle velocity quantities of 31 events of overall 6 different blastings which are take place all in the area which is in question in different times are determined with recording devices. Then, in order to determine particle velocity, scaled distance and particle velocity data are analysed fort he area in question. During this analysis, distance equality with square root and scale which is widely used in literature is used. In the end of evaluation, for the area in question, between the scaled distance and particle velocity, with a prediction tolerance of 95%, an empirical connection with a good correlation (r=0,75) is obtained and recommended. By using this connection, the highest particle velocity, tables which cotain the prediction of the maximum charge quantities per delay are given and some suggestions which should be taken in care in the next works are put forward and these will provide practical easines in usage in future blastings. To compare and estimate the impact levels of the results obtained from the area in question on the surrounding buildings and institutions; with taking frequencies of particle velocity components in consideration, are evaluated according to universally accepted German DIN 4150 Norm, USBM Norm and T.C. Ministry of Environment and Forest's Regulation of Management and Evaluation of Noise.
Citation Count: 10
Evaluating radio frequency identification investments using fuzzy cognitive maps
(2008) Üstündag̈,A.; Tanyaş,M.
RFID (Radio Frequency Identification) is an Auto-ID technology which uses radio waves to automatically identify the individual items. Using RFID systems for identifying and tracking objects, it is possible to improve the performance of a supply chain process in terms of operational efficiency, accuracy and security. RFID systems can be implemented in different levels like item, case or pallet. These various applications create different impacts in supply chain processes. RFID investments are very important strategic decisions so they require a comprehensive evaluation process. The tangible and intangible benefits should be integrated to evaluate them. The fuzzy cognitive mapping (FCM) is a suitable tool to model causal relations in a non-hierarchical manner for an RFID investment evaluation. In this paper, the FCM method is used to measure the impact of RFID investment in a supply chain process. © 2008 Old City Publishing, Inc.
Citation Count: 2
Note on Faraday's law and Maxwell's equations
(Iop Publishing Ltd, 2008) Kholmetskii, Alexander L.; Missevitch, Oleg V.; Yarman, Tolga; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
We generalize the approach developed by us for the evaluation of the total time derivative of circular integral (Kholmetskii A L et al 2008 Eur. J. Phys. 29 L1-4) and derive an explicit expression for the total time derivative of the area integral for a differentiable vector field. On the basis of this expression, we prove for the first time that Faraday's law can be directly obtained from the Maxwell equations del x E = -delta B/delta t, del center dot B = 0 and the Lorentz force law.
Citation Count: 0
The analysis of ground vibration blast induced on Istanbul Kavacik-Beykoz waste water tunnel
(2008) Ozer,U.; Kahriman,A.; Aksoy,M.; Karadogan,A.; Adiguzel,D.; Makine / Machinery
This paper presents the results of ground vibration measurements and environmental issues occurred on tunnel blasting activities during Kavaci{dotless}k-Beykoz waste water tunnel construction under a residential area in Istanbul, Turkey. Within the scope of the study, the blasting pattern of tunnel was engineered by using Tunnel 2000 design software. 5 events in 5 shots at S2 shaft tunnels, 6 events in 6 shots at S4 shaft tunnels, 32 events in 32 shots at S6-shaft tunnels and, 7 events in 7 shots at S7 shaft tunnels were recorded. The particle velocities and frequencies associated with 50 shots during the advancement of the tunnels were monitored and analyzed by vibration monitors at the test site. Scaled distance and peak particle velocity data pairs were analyzed statistically. During the statistical analysis, three different predictor equations widely used in the literature were used to predict peak particle velocity (PPV) and the results and comparison of the predictor equations are presented in this paper. As a result of this analysis, empirical relationships between Scaled distance and peak particle velocity for these regions were established with higher correlation coefficients. Finally, the particle velocities and frequency values of all blast events were evaluated according to T.C. Ministry of Environment and Forest's Regulation of Management and Evaluation of Noise, The United States Bureau of Mines (USBM) and German DIN 4150 Norms in order to predict, and compare the influence grades to the neighboring buildings, and structures.

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