Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12294/1672

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Internet Addiction Research in the School of Vocational Studies: Evidence from Turkey
(Int Scientific Conference SGEM, 2008) Kurt, Dogus; Tekin, Abdulkadir; Yildirim, Osman
As a growing trend in the world, internet-based remote education both in governmental and private education institutes is getting popular in Turkey as it is to be all over the world. Internet-based education models give learners the chance to interact with the system. The aim of this research is to examine the relationship between personality and internet addiction of the students of Vocational school in a few of private University in Istanbul, Turkey. There is a significant correlation between the student personality which are depicted via adjective checklist and the student' internet addiction. Adjective Check List (ACL) items consist of adjectives which are words and/or phrases used for daily descriptions in Turkish Language. The scale composed of 25 items is examined for psychometric properties and internal consistency. In this research, Internet Addiction Inventory and ACL were conducted at the same time to a sample of 254 students of School of Vocational Studies. Internet addiction and personality correlates of ACL are of interest oil two counts. It is important to know what variables may be confounded with tendency of internet, usage.
Relationship between Emotional Intelligence and Foreign Language Learning
(Int Scientific Conference Sgem, 2008) Tekin, Abdulkadir; Yildirim, Halil; Yildirim, Osman
The increasing number of recent researches indicates that emotional intelligence is more important than IQ in many fields. In literature, many quantitative findings indicate that there is a significant relationship between academic achievement and emotional intelligence skills. In other words, analysis indicates that emotional intelligence skills can serve as a indicator of academic achievement and effective learning. The main focus of this research is to discuss the relationship between emotional intelligence skills and academic achievement in foreign language and explore how their relationship may influence language learning. The sample data for this research is 372 School of Vocational Studies students in Istanbul. Thus, this research aimed at exploring the relationship between academic achievement (effective learning) and emotional intelligence skills. In the research, participants emotional intelligence was assessed by the Emotional Competence Inventory (ECI, 2nd Version) developed by Boyatzis and Goleman. According to the results, a strong relationship (r>0,40) was found between academic achievement and emotional intelligence skills.
The Effects of Doubling-Slurring on Grey Balance and Dot Tone Value Increase in Offset Printing
(2009) Aydemir, C.; Ünal, H.; Özsoy, S.A.
Being in connection with the developing science and technology there have been great developments during the recent years in the area of printing and the same developments still go on. One of the most important ones of these is the technological advances accomplished in the quality controls during the printings. Together with the technological developments, quality-control in the printing can be implemented more objectively and with the same standard. Especially, the developments in the measurement devices such as spectrophotometer provide the achievement of correct measurements in color and density assessments. However, it is not possible to have the measurement of quality on the printed surface by only using these devices. Because, after proceeding to the clean printing, first doubling-slurring area must be viewed with the eyes on the control strips. If doubling-slurring problem is encountered in this area, there must not be a second measurement to follow unless the possible causes are eliminated. Because, even though the density of the ink, trapping values, etc., could be normal, there is the possibility to observe the artificial increase in tram tone values (dot gain out of tolerance) and then this situation is perceived as the printing is carried out with the ink having more density. The entire balances and force values of the machine must be done mechanically with Altona Test Suite or with the similar scale during the first installation. If these adjustments are not done during the installation or if they are deteriorated afterwards, doubling-slurring occurs. Having the printing force more than normal, blanket errors, rheological features of the ink, etc., L*a*b*, solid tone, trapping values must be measured with spectrophotometer after resolving doubling-slurring errors and the data must be interpreted according to ISO 12647-2:2004 and FOGRA standards. In general, dot tone value increase and grey balance problems are thought by the printing applicators to be caused by dot tone value increase and the problems of grey balance and by the printing pressure. Intensity values of the ink is firstly tried to be controlled in order to have the controls of dot tone increase and grey balance in the printing. Whereas, this is a wrong way of thinking on it's own. Because, dot tone value increase and grey balance problems causes is not only the abundance of the ink or the printing pressure. It is also required that the other effects causing this problems must also be examined. The study is done on the effects of doubling-slurring on grey balance and dot tone value increase. First the measurements of CMYK colors L *a*b*, dot tone value increase between 10%-100% and solid tone density values are measured on the test printing originals that are printed with standard conditions and having and not having doubling-slurring from UGRA 82 printing control scales. In the study, the effects of doubling-slurring problem on the grey balance and dot tone value increase are researched visually and numerically and obtained data are put forward with the graphics.
Citation - WoS: 2
Citation - Scopus: 7
Art, Desire, and Death in Orhan Pamuk's My Name Is Red
(Taylor & Francis Ltd, 2009) Lekesizalin, Ferma
Orhan Pamuk's 1998 novel, My Name is Red, features the field of art as torn with the ambiguities and the paradoxes of desire and the Ottoman miniaturist as tom with the dilemmas of East/West, reality/representation, tradition/innovation, and pleasure/pain. Except for the evident preoccupation with the differences of aesthetic concepts between the East and the West, My Name is Red further penetrates into the nature of representation and reality and explores the desire for perfection in art. Connected with the desire for immortality, the desire for perfection is projected onto the Western Other by the Ottoman artist and emerges as the unattainable object as well as the main drive for artistic creativity in the novel. In Pamuk's novel, art can be a pleasurable experience so far as it supports the fantasies of completeness and perfection and so far as it forecloses the realization of perfection which does not necessarily bring full satisfaction. The mysterious allure of art is rather consisted in its reproduction of desire as such.
Citation - WoS: 3
Citation - Scopus: 4
Colon Segmentation and Colonic Polyp Detection Using Cellular Neural Networks and Three-Dimensional Template Matching
(Wiley, 2009) Kilic, Niyazi; Ucan, Osman N.; Osman, Onur
In this study, an automatic three-dimensional computer-aided detection system for colonic polyps was developed. Computer-aided detection for computed tomography colonography aims at facilitating the detection of colonic polyps. First, the colon regions of whole computed tomography images were carefully segmented to reduce computational burden and prevent false positive detection. In this process, the colon regions were extracted by using a cellular neural network and then the regions of interest were determined. In order to improve the segmentation performance of the study, weights in the cellular neural network were calculated by three heuristic optimization techniques, namely genetic algorithm, differential evaluation and artificial immune system. Afterwards, a three-dimensional polyp template model was constructed to detect polyps on the segmented regions of interest. At the end of the template matching process, the volumes geometrically similar to the template were emhanced.
Citation - WoS: 6
Citation - Scopus: 5
Stress Analysis of Ceramic Insulation Coating on Cu/MgB2 Wires for W&R MgB2 Coils
(Elsevier Science SA, 2009) Arda, L.; Ataoğlu, S.; Abdulaliyev, Z.; Saçlı, Ömer Asım; Arda, L.; Ataoglu, S.; Abdulaliyev, Z.; Sacli, O. A.
Ceramic insulation coatings were produced on Cu/MgB2 wires, which were fabricated by Hyper Tech Research Inc., using Continuous Tube Forming and Filling (CTFF) process, from the solution of Zr, and Y based organometalic compounds, solvent and chelating agent using reel-to-reel sol-gel technique for MgB2 Coils. Y2O3-ZrO2/Cu/MgB2 wires were annealed at 700 degrees C for 30 min with 5.8 degrees C/min heating rate under 4% H-2-Ar gas flow. Residual stresses were examined for Cu/MgB2 wire and YSZ coatings with varying thicknesses. It was observed that displacement values are independent from YSZ thicknesses and the maximum effective stress value is in the Cu region. The surface morphologies and microstructure of samples were characterized using SEM. SEM micrographs of the insulation coatings revealed cracks, pinholes and mosaic structure. (C) 2008 Elsevier B.V. All rights reserved.
Citation - WoS: 3
Citation - Scopus: 7
Hotel Employees' Beliefs on Unethical Behavior
(Emerald Group Publishing Ltd, 2010) Guler, Emel Gonenc; Yukselen, Cemal
Purpose - The purpose of this study is to explore the beliefs of employees who work in different positions in the hotels in Edirne, Turkey regarding unethical applications. Design/methodology/approach - The survey method was used to determine the hotel personnel's unethical behaviors in the process of the service operation in hotels. The questionnaire was mainly developed from a Varinli study which was applied to the employees' job-related ethics. Findings - The findings have been evaluated and analyzed using the SPSS 11.5. The mean value and the t-test were applied for the analysis. It was aimed to determine the beliefs of the hotel personnel's about unethical behaviors according to the 20 statements related to the topic. It was understood that the respondents significantly did not accept unethical behaviors that were scaled with 20 statements. Research limitations/implications - Some statements in the questionnaire were either changed or extended, considering all the hotels in Edirne. The questionnaire was applied in 15 hotels from 9-13 March in 2009 and excluded employees who were not on the premises during the process. After a week 160 valid questionnaires were either collected from or posted by those concerned. Practical implications - The research aims to investigate the job-related unethical beliefs of hotel employees. The housekeeping, food and beverage, and front-office departments are mainly studied from the perspecive of the unethical applications. Nevertheless, the answers represented only the personnel's ethical beliefs. Whether they would "actually perform in such a way'' in real life is difficult to verify. It is not possible to verify the employees' actual behavior compared with their answers in the questionnaire. Originality/value - The paper is based on a Varinli study which was applied to the employees' job-related ethics. In 2004 Varinli studied the hotel employees' beliefs regarding unethical applications in 3-and 4-star hotels in Capadocia.
Citation - WoS: 2
Citation - Scopus: 2
The Determination on the Effects of the Sewing Parameters to the Seam Strenght of the Tencel Fabrics
(2010) Çitoǧlu, F.; Onur, N.
The most important quality problems in garments of the ready-made industry is the seam strength. Beside the garment quality and its performances, the seam strength, slippage of the seam, seam pucker etc. are also various factors that may effect. in this study, 4 different tencel fabrics with 6 different sewing yarns were used for the different weights and structures of fabrics were tested for their seam strengths and elongations with using different types of sewing yarns and seam densities. The results were analysed by using the SPSS software programme. it was observed that Tencel fabric's with basic structure have shown higher seam strength than the rib fabrics. As the sewing yarns get coarser the seam strength in weft, warp and and diagonal direction increases. As the sewing yarn gets finer the seam strength decreases and the highest strength was observed on the diagonal direction and the least strength was obtained on the warp direction of the fabric. Also as the seam density increases the strength and elongation were increased.
Citation - WoS: 1
Citation - Scopus: 13
Overlapping Clusters Algorithm in Ad hoc Networks
(IEEE, 2010) Aydin, Nevin; Nait-Abdesselam, Farid; Pryyma, Volodymyr; Turgut, Damla
Clustering allows efficient data routing and multi-hop communication among the nodes. In this paper, we propose Overlapping Clusters Algorithm (OCA) for mobile ad hoc networks. The goal of OCA is to achieve network reliability and load balancing. The algorithm consists of two discrete phases. The start-up phase takes battery and bandwidth capacity, transmission range, density, mobility, and buffer occupancy as input parameters to perform initial clustering for the entire network. The maintenance phase monitors the status of the network and keeps the network topology updated through local and global re-clustering. We compare the performance of OCA with Lowest ID, Highest Degree, WCA, and LCC algorithms in YAES simulator. The simulation results show that OCA outperforms all the compared algorithms in terms of network reliability and load distribution. The average numbers of global re-clusterings and reaffiliations were much lower in OCA than the other algorithms. However, OCA generates a larger number of clusters, which is expected considering that the nodes are allowed to be members of multiple clusters at the same time.
Citation - Scopus: 1
A Multivariate Comparison of Foreign-Owned versus Domestically-Owned Private Firms: The Case of Top 500 Industrial Enterprises in Turkey
(2010) Erdogan, A.I.
This paper examines the major aspects of conduct and performance that distinguish foreign-owned firms that operate in Turkey from domestically-owned firms. The firms that are analyzed are among the top 500 industrial enterprises in Turkey. We conduct repeated measures logistic regression on 77 foreign-owned firms and 215 domestically-owned firms for the period 2004-2008. The results show that domestically-owned firms have higher capital productivity than foreign-owned firms. Foreign-owned firms and domestic firms do not differ in terms of our other performance variables which are pretax profit margin, return on equity and labor productivity. Moreover, the two group of firms do not differ in terms of size, capital intensity, export intensity, patent intensity and trademark intensity. Domestically-owned firms also have higher capital productivity than majority foreignowned firms. On the other hand, majority foreign-owned firms are larger in size than domestically-owned firms. These two type of firms do not differ in terms of our other discriminating variable candidates. © EuroJournals Publishing, Inc. 2010.
Is Psychology a Social Science?
(Common Ground Research Networks, 2010) Özakpinar, Yilmaz
This presentation explicates the rationale for the claim that, contrary to the general opinion, psychology is not a social science. Sociology, the typical social science to represent all the others, starts from observing human behavior in the context of human relationships and abstracts from the samples of such behaviors the social rules governing those relationships which do not belong to any concrete individual. Psychology starts from the base of individual behaviors performed in response to physical and social stimuli and by using certain procedures of investigation and the logic of experimental reasoning tries to discover the rules governing the workings of the mind. The mind belongs to an individual biological organism and it is the instrument of social perception and social action as well as the instrument of perception of and behavioral responses to the physical environment. If that is so, then even social psychology is a branch of general psychology in virtue of its studying how an individual mental mechanism perceives and processes social stimuli and decides what kind of actions to take and what sort of attitudes to hold. It is concluded that although humans are social beings, psychology is not a social science; in fact, it belongs to the realm of biological sciences because behavior is a means of adaptation of an individual to the physical and social environment. © Common Ground, Brian Willis.
Citation - Scopus: 4
Personality from the Standpoint of Social Psychology
(Common Ground Research Networks, 2010) Özakpinar, Yilmaz
Social psychology studies individual behavior in social situations and aims at discovering the mental processes producing the kind of behaviors observed in them. The concept of personality does not designate a special category of responses. It represents a recognizable behavioral style reflected in responses observed not only in social situations but also in all kinds of responses related to perception, learning, attending, remembering, problem-solving, and expressing emotions. In the present study, personality is envisaged as the product of the integration of four components: Temperament, character, cognitive capacity, and perceived social situation. It is argued that the personality of any individual may appear to others as having changed, but in fact there is only a strategic attempt at trying to adapt to differing demands of varied situations. © Common Ground, Yilmaz Özakpinar, All Rights Reserved.
İletim Ağlarındaki Tıkanıklığın Güç Akışı Çözümleri ile Saptanması
(2010) Güner, Sıtkı; Bilir, Bülent
Transmission congestion has become a new challenge in an open-access environment of electric power systems. In today's world, electric transmission networks have been so much loaded that such a case has never been observed before. It is mainly because of deregulation in the electricity industry and utilization of renewable energy resources for power generation. Under these circumstances, management of transmission congestion is a crucial task to successfully operate power systems and to plan new additions to the current power grid. The first objective of this study is to determine maximum amount of possible power transfer between a load bus and a generator bus of interest in the running system. The second objective is to detect load centers that are not congested for power transmission from a newlybuilt power plant such as a wind farm, a solar power plant, and a small size hydro dam. In order to identify congestion in transmission networks, power-flow solutions have been examined for various load and generation levels. Under the condition that additional generation is supplied and the corresponding load is demanded, the power-flow program developed by the authors of the paper has been run. After a base case solution of the power flow is obtained, a load bus and a generator bus have been selected to apply incremental changes in real power and reactive power. The scenarios for simulations of this research work are based on applying equal amount of power as load and generation for the selected buses. To assess the real and reactive power capacities of a selected bus, the P-V curve and the Q-V curve for the selected bus have been plotted by running the power-flow program to get bus voltages versus real and reactive power. As a result of this process, the real and reactive power capacities of the selected bus and information about the congested parts of the power network have been obtained. Therefore, such information is provided for power utilities to manage power efficiently and for power marketers to sell power economically.
Citation - Scopus: 2
The Long-Run Performance of Initial Public Offerings: The Case of Turkey
(2010) Erdogan, A.I.
The purpose of this paper is to investigate the long run stock price behavior of initial public offerings (IPOs) in Turkey. Our sample consists of 126 IPOs for the period from 1995 to 2000. We use four different methodologies to analyze the relative performance of IPOs for up to five years after listing. The sample displays evidence of underperformance when we use wealth relatives as a measure of long-run performance. Using equally weighted BHARs as an abnormal performance measure, we find that IPOs significantly underperform the Istanbul Stock Exchange 100 Index after two years, after three years and after five years. Significant underperformance is found for value weighted BHARs after two years and after five years. The sample displays evidence of no underperformance or overperformance when we use cumulative abnormal returns. A calendar-time analysis also provides no evidence of underperformance or overperformance. Eventually, the results show that the performance of IPOs in Turkey depends on the method of return measurement used. Our findings provide support for Fama (1998) who argues that long-term return anomalies can be due to methodology and most anomalies tend to disappear with the use of different methods. © EuroJournals, Inc. 2010.
Citation - Scopus: 3
Informatics Education in Different Disciplines at University Level: Case Study: A Survey of Students' Attitude Toward Informatics Technologies
(2011) Tingöy, O.; Güllüoǧlu, S.S.
This article presents a quantitative study on attitudes toward the usage of Information Technology related tools and applications. The study was conducted at a private university, Turkey, with 97 female and 113 male students involved as participants. They were each presented with a questionnaire to relate their attitudes toward IT and after undergoing a discrete IT course for the duration of one semester (15 weeks). The attitudes of the respondents were measured in terms of three dimensions, namely, usefulness, confidence and learning. Both genders exhibited the same levels of attitudes after undergoing the comprehensive IT course. The largest improvement for females and males was in the learning dimension which showed that their initial dislike toward IT was greatly reduced at the end of the course. In terms of confidence, female and male participants exhibited an enhanced confidence level after the course. One area of information technology quickly becoming ultimate is the field of Informatics. Information technology is the area of managing technology and spans wide variety of areas that include but are not limited to things such as processes, computer software, information systems, computer hardware, programming languages, and data constructs. To meet this growing need universities are beginning to develop degree programs with the integration of Informatics. In response to the widespread use of and ever-changing nature of Informatics, various investigations were carried out regarding attitudes toward informatics. Employing people who understand Informatics is a top priority for industries, business, government, education and the military sectors. Informatics can be defined as the multidimensional use of technology to support knowledge discovery assisting the decision maker to achieve the organizational goals. Informatics incorporates the way data is collected, organized, analyzed, represented, filtered and managed. Totally this paper attempted to investigate university student attitudes toward the integration of Informatics Technology in their departments and factors contributing to their attitudes so as to provide some constructive information and suggestions for the adoption of technology in informatics education. © The Turkish Online Journal of Educational Technology.
Citation - WoS: 5
Citation - Scopus: 6
A New Approach to Prediction of SO2 and PM10 Concentrations in Istanbul, Turkey: Cellular Neural Network (CNN)
(Taylor & Francis Ltd, 2011) Sahin, Ulku Alver; Ucan, Osman Nuri; Bayat, Cuma; Tolluoglu, Orhan
This article describes the application of a cellular neural network (CNN) to model air pollutants. In this study, forthcoming daily and hourly values of particulate matter (PM10) and sulphur dioxide (SO2) were predicted. These air pollutant concentrations were measured at four different locations (Yenibosna, Sarachane, Umraniye and Kadikoy) in Istanbul between 2002 and 2003. Eight different meteorological parameters (temperature, wind speed and direction, humidity, pressure, sunshine, cloudiness, rainfall) recorded at Florya and Goztepe meteorological stations were used to model inputs. First, the results of CNN prediction and statistical persistence method (PER) were compared. Then, CNN and PER outputs were correlated with real time values by using statistical performance indices. The indices of agreement (d) for daily mean concentrations were found using CNN and PER prediction models: 0.71-0.80 and 0.71-0.78 for PM10, and 0.81-0.84 and 0.77-0.82 for SO2 in all air quality measurement stations, respectively. From these values, CNN prediction model are concluded to be more accurate than PER, which is used for comparison. In hourly prediction of mean concentrations with CNN, d value is found as 0.78 and 0.92 for PM10 and SO2, respectively. Thus, it was concluded that CNN-based approaches could be promising for air pollutant prediction.
Citation - Scopus: 4
Modelling of Swelling by the Fluorescence Technique in Kappa Carrageenan Gels
(Amer Inst Physics, 2011) Tari, Ozlem; Pekcan, Onder
Kappa (-kappa) carrageenan gels prepared with various carrageenan concentrations in pure water were completely dried and then swelled in water vapor. Steady state fluorescence measurements were performed using a spectrometer equipped with temperature controller. Pyranine was embedded in kappa-carrageenan gels as a fluorescence probe during gel preparation. The fluorescence intensity, I, increased exponentially as swelling time is increased for all gel samples. The increase in I was modelled using Li-Tanaka equation from which swelling time constants, tau(c) and cooperative diffusion coefficients, D-c were determined. It was observed that D-c increased as the swelling temperature was increased. On the other hand at each temperature, it was seen that D-c decreased as kappa carrageenan concentration was increased. Activation energies for swelling were obtained and found to be 57.4, 58.3 and 62.73kJ mol(-1) for the gels with increasing amount of kappa-carrageenan content.
Citation - WoS: 20
Citation - Scopus: 22
Insiders’ Views of Their Role: Toward Their Training
(Univ Toronto Press Inc, 2011) Krespi Boothby, Margorit Rita; Boothby, Margorit Rita Krespi
Research on peer-led support programs in prisons suggests that these programs are beneficial. One such program is the Insiders Scheme. Preliminary reports on its effectiveness suggest that it has a positive impact on prisoners as well as on the Insiders themselves. Nevertheless, there is no detailed information on the ways in which the Insiders perceive their role. Information may help to set targets for training of Insiders. Therefore, in the present qualitative study, focus group meetings were undertaken with all three Insiders in a male prison, using an interview-guide approach to describe the ways in which the Insiders perceived their role. The anonymized transcripts of these meetings were analysed inductively by following established conventions to ground analysis in the data. Insiders evaluated their role in terms of the different aspects of their role, the strategies that they used to help other prisoners, the personal impact of their role, the difficulties that they experienced during the course of their work, and possible ways of improving their role. The present findings contribute to an evidence-base for peer-centred training for the Insiders Scheme and therefore highlight the value of undertaking qualitative research among Insiders to identify specific targets for their training.
Belief and Knowledge: Types of Knowledge and Degrees of Belief
(Common Ground Research Networks aaron.clark@commongroundpublishing.com, 2011) Özakpinar, Y.
Human knowledge, such as: experience; opinion; impression; inference; intuition; insight; feeling; introspective awareness; reasoned conclusion; ideology; plan of an engineering construction; scientifc theory, is essentially belief since one cannot be certain about its validity or correspondence to reality or truth. There are degrees of belief regarding empirically based knowledge. In this context, belief is equivalent to probability. There are potentially limitless ways of obtaining new evidence for or against a belief about the empirical world. When someone has faith in the truth of a religious tenet or of an ideology, that means he is not interested in testing it, and this provides for this person a subjective certainty. In everyday life we implicitly try to test our opinions and beliefs about the events in the empirical world although it is not always possible due to the pressure of time or our biases. In those areas of knowledge where a person professes faith, on the other hand, it is either impossible to test, as it is the case in having faith in a religious tenet, or there is refusal to test as it is the case with believing in an ideology. It is argued that the confict of religion and science on any matter is philosophically absurd although it is an historical fact, because knowledge based on faith and scientifc knowledge are not alternatives of each other: the frst is not testable by the observations in the empirical world and held to be certain, and the second is testable and held to be only probable. © Common Ground, Yilmaz Özakpinar, Al.
Citation - Scopus: 6
Bifurcation Mechanism of Low-Frequency Oscillations in Power Systems with Long Transmission Lines
(2011) Bilir, B.
Low-frequency oscillations have long been observed in power systems with long transmission lines. However, the underlying mechanism that leads to these oscillations has not been identified clearly so far; that is, the close connection between transmission distance and occurrence of oscillations has not been verified. As known by power engineers, low-frequency oscillations are the heart flutters of the power grid. Accordingly, fundamental understanding of the mechanism of these oscillations is of crucial importance. Our work addresses the bifurcation mechanism of the low-frequency oscillations that results from long-distance transmission. Analyzing the dynamical model of a sample two-machine power system with transfer conductance under changing the length of transmission lines via simulations by MATLAB and SIMULINK, we have come up with the mechanism of subcritical Hopf bifurcation, which results in low-frequency oscillations growing in amplitude. In this paper, we present our results regarding these oscillations. © 2011 Chamber of Turkish Electric.

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