TR-Dizin İndeksli Yayınlar Koleksiyonu

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A bibliometric analysis of extended reality research trends in communication studies written in English Mapping the increasing adoption of extended reality technologies
(ISTANBUL UNIV FAC COMMUNICATION, 2024-07-12) Simge Ugurluer; Mert Seven
With the development of communication technologies extended reality technologies and applications are increasingly favoured because of their potential to contribute to interactive digital experiences. In addition to providing information about objects the integration of extended reality offers an enriched experience through a virtual layer that includes various interactions. This paper offers a quantitative and systematic review of studies published in the Web of Science Science Citation Index Expanded (SCI-EXPANDED) Social Sciences Citation Index (SSCI) Emerging Sources Citation Index (ESCI) and Arts & Humanities Citation Index (AHCI) on extended reality technology in communication studies in English between 1992 and 2023. Within the scope of this research studies on the concepts of mixed reality augmented reality virtual reality and extended reality in journals indexed in the Web of Science (WOS) database were searched. A total of 209 publications were included in the scope of the bibliometric analysis with filters for publication type language open access category and subject. Bibliometric tools were employed to identify trends in extended reality and communication studies including primary research topics and clusters interdisciplinary distribution productivity and collaboration at the country level keyword and citation networks and co-occurrence networks. These findings contribute to the understanding of the evolution of extended reality research in communication studies and lay a foundation for further research.
Citation - WoS: 3
Citation - Scopus: 3
A COMPARATIVE STUDY ON THE EXERGOECONOMIC ANALYSIS OF TEXTILE DRYERS USING SPECO METHOD
(EGE UNIV, 2012) Ahmet Cay; Isik Tarakcioglu; Arif Hepbasli; Hepbaşlı, Arif; Çay, Ahmet; Tarakçıoğlu, Işık
This study reveals the exergoeconomic analysis of stenters by using Specific Exergy Costing (SPECO) method. The cost balances and auxiliary thermoeconomic relations were developed for direct gas heated (DGHS) and hot oil heated (HOHS) stenters by the application of the control volume models. The exergy cost of the evaporation of water was selected to be the main parameter. It was shown that the falling-rate period of drying led to the highest exergy costs while exergy costs varied between 0.19 US$/GJ and 0.59 US$/GJ depending on the drying periods. Increasing the exhaust air humidity ratio and the residual moisture content of the fabric outlet decreased the exergy costs linearly.
A Comprehensive Overview of Foreign Language Teachers' Professional Development: Self-directed and Institutional Professional Development Activities of English Teachers in Turkey
(Turkish Education Association, 2024-07-30) Çaǧri Özköse-Biyik; Oner Uslu; Bıyık, Çağrı Özköse; Uslu, Öner
When the literature on the professional development of English as a foreign language (EFL) teachers is examined professional development predominantly encompasses institutional activities. This study critically examines conventional definitions and practices related to the professional development of EFL teachers arguing that in line with the demands of the era teachers' professional development should also include self-directed individual activities. However for professional development activities to contribute to the ultimate goal of student learning it is important for the organizational culture in which teachers are situated to be supportive of their professional development. To seek answers to research questions about how the institutional and self-directed activities carried out by EFL teachers in Türkiye and the organizational culture influence these activities an exploratory sequential strategy was employed in the research. First qualitative data were collected and then quantitative data were collected through a survey tool developed based on the qualitative data. Comprehensive individual interviews were conducted with a total of 28 teachers across Turkey and survey data were collected from 819 teachers. The findings are presented as self-directed (unstructured) professional development activities (e.g. use of search engines reading news websites watching videos/series etc.) and institutional (structured) professional development activities (participation in national and international conferences etc.). The necessity of foreign language teachers being involved in many individual activities through self-direction beyond their participation in activities planned by institutions for the professional development of a foreign language teacher is discussed. The study proposes a comprehensive perspective on the concept of professional development related to EFL teachers and offers recommendations for the field of foreign language teacher education. © 2024 Elsevier B.V. All rights reserved.
A Demand for Narrative: Reading Sabahattin Ali's Novel Kuyucaklı Yusuf as a Quest for Identity
(SELCUK UNIV FAC LETTERS, 2024-06-30) Murat Baran Akkus
Sabahattin Ali's first novel Kuyucakl & imath, Yusuf published in 1937 is a historically significant text within Turkish literature, it is the first realistic novel about Anatolian life and is a critique of the social system. However the novel remained incomplete due to Ali's murder in 1948 amid a rising tide of authoritarianism and nationalism that he consistently critiqued. This study examines the novel's demand for narrative identity in the context of its creator's untimely death. The study reveals three obstacles: the silent language of victimhood the extreme experience of loneliness and the finality of the author's death all of which function as barriers to realizing personal narratives. This exploration is also an attempt at an act of sepulcher as defined by Paul Ricoeur which means mourning the author's death by revising the incompleteness of Yusuf's identity. Ali's novel is an example of an ethical mode of authoring that requires giving up authoritative control over real or fictional life stories. Acknowledging the existence of untold stories alongside the potential for new narratives attests to the power of storytelling through the vulnerability of a life story.
Citation - Scopus: 10
A genetic algorithm to solve the multidimensional Knapsack problem
(Association for Scientific Research membranes@mdpi.com, 2013-12-01) Murat Erşen Berberler; Asli Guler; Urfat Nuriyev; Berberler, Murat Ersen; Guler, Asli; Nuriyev, Urfat G.
In this paper The Multidimensional Knapsack Problem (MKP) which occurs in many different applications is studied and a genetic algorithm to solve the MKP is proposed. Unlike the technique of the classical genetic algorithm initial population is not randomly generated in the proposed algorithm thus the solution space is scanned more efficiently. Moreover the algorithm is written in C programming language and is tested on randomly generated instances. It is seen that the algorithm yields optimal solutions for all instances. © 2020 Elsevier B.V. All rights reserved.
A novel square-root domain realization of first order all-pass filter
(Tubitak Scientific & Technological Research Council Turkey, 2010-01-01) Sinem Olmez; Ugur Cam
In this paper a new square-root domain first order all-pass filter based on the MOSFET square law is presented The proposed filter is designed by using nonlinear mapping on the state variables of a state space description of the transfer function To the best knowledge of the authors the filter is the first square-root domain first order all-pass structure designed by using state space synthesis method in the literature The center frequency of the all-pass filter is not only attainable at megahertz frequencies but also tunable by an external bias current The proposed filter operated 2 5 V supply voltage is constructed by current mirrors geometric mean circuits a linear transconductor circuit and a capacitor SPICE simulations are given to approve the theoretical analysis
A proposed model for candidate selection process in political parties based on fuzzy logic methodology
(Association for Scientific Research membranes@mdpi.com, 2012-08-01) Yılmaz Gökşen; Onur Doǧan; Mete Eminaǧaoǧlu
Classical logic and classical set theorems are not sufficient enough when it is necessary to deal with complex decision making problems which also involve human experiences. Some researches suggest that senior management usually makes intuitive decisions in the process of selecting the candidates in political parties which brings out the need to derive a new efficient robust and applicable method. In this study the qualitative characteristics and their significance level which could be used for the candidate selection process in political parties are determined. The candidate selection process consisting vague inputs is analyzed by fuzzy logic methodology and a quantitative final score has been determined for the candidate. It has been shown that the model provided some realistic and promising results which could enable further studies to derive more optimized and enhanced models for similar purposes. © 2020 Elsevier B.V. All rights reserved.
A Spatial Reflection of Social Transformation: Taksim Municipal Gazino 1939
(ISTANBUL UNIV RESEARCH INST TURKOLOGY DEPT ART HISTORY, 2024-01-31) Begum Sena Onal Ozmalatyalilar; Meltem O. Gurel; Gurel, Meltem O.; Önal, Begüm Sena; Ozmalatyalilar, Begum Sena Onal; Gürel, Havva Meltem; Önal Özmalatyalilar, Begüm Sena
Taksim Municipal Gazino which hosted its visitors inside the Inonu Promenade between 1939 and 1967 was one of the leading examples of gazinos (an entertainment venue) built with the support of the state in the early republican era in Turkey. Designed by the municipality architect Ruknettin Guney within the scope of French city planner Henri Prost's Istanbul Master Plan the edifice was a quintessential example of modern architecture that epitomized the state's Westernization ideology. This article examines the gazino practice as a spatial reflection of social transformation by presenting a historical and spatial reading of the Taksim Municipal Gazino. The study analyzes the gazino structure as a power mechanism that produces secular identities by focusing on the dialectic between the spaces in the building and the experiences of its patrons. The analysis of architectural drawings photographs and literary works associated with the building on the one hand reveals how the architect operating as a cultural leader utilized architectural creation to present the Western lifestyle to society. On the other hand it indicates that Taksim Municipal Gazino served as a platform for individuals to display their modernity. Moreover the study propounds that the building contributed to the modernization process of the newly established nation-state and it has served as a spatial tool that notably strengthened the position of female regulars in the public sphere.
A Symmetrical-Asymmetrical Fault Characteristics Analysis within Cogeneration Power Plant in Izmir Turkey: An Experimental Assessment
(Gazi Universitesi, 2022-06-01) Hacer Sekerci Öztura; Sezai Polat
The analysis of the short circuit should be understood very well in order to make correct designs in the power systems such as the safety of the personnel and the equipment the selection of the safety relays the circuit breaker selection and the selection of the appropriate conductor section. In this study the parameters about the short circuit and the techniques of calculating the faults in system and the necessary theoretical knowledge for the short circuit fault to be understood better have been given. The effect on the distributed generation and the grid which is caused by the possible short circuit faults have been simulated by being modeled in PSS/Sincal and by using the real grid parameters with cogeneration power plant in Izmir Turkey. The real short circuit fault results measured from the power plant and the grid and the results obtained from the software program have been compared and it has been determined that there is not a significant difference between them. Thus it has been emphasized that it is correct to simulate before investing in a power system in for the purpose of restrain the faults during the designing and working before the application. It allows the designer to design new power plant as good as plan expansion of existing power plants with higher degree of precision. Considering the prices of protection equipment which has a large part in system design this way would allow designer to reduce the cost of the protective equipment and remaining stability. © 2023 Elsevier B.V. All rights reserved.
African studies in Turkey, Türkiye’de Afrika çalışmaları
(Forsnet bilgi@uidergisi.com.tr, 2016-08-24) Elem Eyrice Tepeciklioğlu
This article aims at providing an analysis of African studies as a recently emerging field of study in Turkish academia. For many years African issues had low priority in both policy and academic circles. The article argues that the recent scholarly interest in African issues is largely a product of the increasing political interest towards the continent. Although the existing literature mostly concentrates on Turkish-African relations and the study of particular African issues remain limited in number African studies in Turkey has made progress and is still evolving with an expanding and diversifying literature. © 2020 Elsevier B.V. All rights reserved.
Citation - WoS: 1
Citation - Scopus: 1
An Empirical Evaluation of Feature Selection Stability and Classification Accuracy
(GAZI UNIV, 2024-06-01) Mustafa Buyukkececi; Mehmet Cudi Okur; Büyükkeçeci, Mustafa; Okur, Mehmet
The performance of inductive learners can be negatively affected by high -dimensional datasets. To address this issue feature selection methods are used. Selecting relevant features and reducing data dimensions is essential for having accurate machine learning models. Stability is an important criterion in feature selection. Stable feature selection algorithms maintain their feature preferences even when small variations exist in the training set. Studies have emphasized the importance of stable feature selection particularly in cases where the number of samples is small and the dimensionality is high. In this study we evaluated the relationship between stability measures as well as feature selection stability and classification accuracy using the Pearson 's Correlation Coefficient (also known as Pearson 's Product -Moment Correlation Coefficient or simply Pearson's r ). We conducted an extensive series of experiments using five filter and two wrapper feature selection methods three classifiers for subset and classification performance evaluation and eight real -world datasets taken from two different data repositories. We measured the stability of feature selection methods using a total of twelve stability metrics. Based on the results of correlation analyses we have found that there is a lack of substantial evidence supporting a linear relationship between feature selection stability and classification accuracy. However a strong positive correlation has been observed among several stability metrics.
Citation - WoS: 33
Citation - Scopus: 36
Antecedents to supply chain innovation
(EMERALD GROUP PUBLISHING LTD, 2020-02-10) Fatma Nur Karaman Kabadurmus; Kabadurmus, Ozgur; Karaman Kabadurmus, Fatma Nur; Kabadurmuş, Fatma Nur Karaman
Purpose The purpose of this study is to examine organizational and environmental (competition capital scarcity and organization of labor) factors that affect firms' innovation activities within the supply chain. Design/methodology/approach This study empirically examines the factors that affect firms' innovation activities using firm-level data from the last round of Business Environment Enterprise Performance Surveys (BEEPS). The analysis covers major supply chain functions: production delivery and support systems. Findings The study shows that drivers of innovation vary with the type of innovation activity, as such innovation efforts across supply chain functions should prioritize strategic resources that will create competitive advantages. Our results also reveal that sustainability efforts in the Eastern Europe and Central Asia (EECA) region should prioritize labor market reforms over capital market reforms. Originality/value Current research on innovation and supply chain issues does not explicitly analyze innovations that occur in different sustainable supply chain functions and empirical studies that focus on the determinants of innovations in the supply chain network are very limited. The data used in this study cover 30 economies in EECA many of which are low- and middle-income countries and thus contribute to the implementation of sustainable practices in developing countries.
Architectural References within Emile Zola's Novel The Ladies' Paradise
(ISTANBUL UNIV FAC LETTERS, 2022-12-21) Layal Alsahli; Zeynep Tuna Ultav; Muge Sever
The depiction of space in literature is crucial to every story as it guides the reader's imagination regarding the story's location and the characters' surroundings. This paper studies the relationship between architecture interiors and literary spaces by using a methodology that draws on architectural literary analysis a methodology that uses literature as a medium to define and analyze architectural spaces and cues. Specifically it investigates the connections between architectural and spatial references and their influences on societal concerns in literature - the literary space within The Ladies' Paradise (1883) a novel by Emile Zola (1840-1902). The retail space portrayed within the novel dominates the narrative. Thus the architectural spaces are described to support the storyline. These spatial cues indicate a specific overall theme namely capitalism - an important issue to discuss within architectural discourse. Zola reveals a new perspective on the social and architectural impacts on society under capitalism through the public interior space of Ladies'Paradise. The research also indicates the correlation between architecture public space and retailing culture through the birth of the department store thus forever altering society's ideology on retail culture. Although the novel is categorized as fictitious the representation of 19th-century retailing culture women's role within society and the significance of architecture are shown to be realistic to that time. In conclusion this paper reveals the dialogue between architecture societal gender issues and the evolvement of retail culture through the medium of literature and derives lessons from this dialogue.
Barriers in Sustainable Lean Supply Chain Management: Implementation in SMEs
(EGE UNIV FAC ECONOMICS & ADMIN SCIENCES, 2025-02-04) Ebru Takci; Erhan Ada; Yigit Kazancoglu; Takci, Ebru; Ada, Erhan; Kazancoglu, Yigit
As the world undergoes significant transformations in various domains including technology energy supply and communication the idea of sustainability has become a significant issue. This study investigates the barriers to Sustainable Lean Supply Chain (SLSC) management within Small and Medium-Sized Enterprises (SMEs) and explores the structural interrelationships among these barriers. A comprehensive literature review was carried out to recognize critical elements relevant to the research topic resulting in the identification of fifteen specific elements that account for 85% of the barriers in SLSC management. The DEMATEL method was used to evaluate the significance and influence levels of these factors. Furthermore structured in-depth interviews were conducted with ten experts representing sectors that constitute 85% of the SMEs operating in Kayseri Organized Industrial Zone (OIZ) Turkey including metal products furniture plastic packaging construction materials textiles and food. The findings reveal that strategies represent the most significant barrier to SLSC management in SMEs. The barriers were analyzed in two dimensions: influencing and influenced factors. The primary influencing factor identified was laws standards regulations and legislation while the most significant influenced factor was found supply and suppliers. The study concludes with findings and actionable recommendations for practitioners and decision-makers.
Biophilic dimensions of products and their effects on user preferences
(Istanbul Teknik Universitesi Faculty of Architecture, 2022) Miray Boğa; Gülname Turan; Hakan Çetinkaya
Biophilia is hypothesized as one of the defining concepts guiding human preferences of everyday life. Although “biophilia” has been well integrated as a design approach in Architectural and Urban Design it is yet to develop in industrial design. Employing a two-staged approach we aimed to define the biophilic characteristics of a product multidimensionally and examine their effects on the users’ preferences. The first stage consisted of empirical studies to describe the biophilic dimensions. This endeavor yielded a word set (N=78) that qualifies the biophilic dimensions (N=6). The words obtained consisted of biophilic design values and the hypothetical biophilic product dimensions that were proposed by researchers. Also we obtained a set of product images (N=18) to be used throughout the study. The second stage was designed to explore the effects of biophilia on user preferences. An expert group (N=120) assessed the associations between the words and product sets. Also a user group (N=1.206) rated how much they preferred these products. The data obtained from the experts and the users were analyzed to examine how the biophilic dimensions predicted the user preferences by regression analyses conducted on SPSS 27. The results revealed that the functional dimension has a significant effect on user preferences in both biophilic and non-biophilic/biophobic cases while the psychological dimension has a significantly negative effect on user preferences just in non-biophilic/biophobic cases. © 2022 Elsevier B.V. All rights reserved.
⊕-Co-coatomically supplemented and co-coatomically semiperfect modules
(Hacettepe University, 2015-12-01) Refail Alizade; Serpil Güngör
In this paper it is shown that a factor module of an ⊕-co-coatomically supplemented module is not in general ⊕-co-coatomically supplemented. If M is ⊕-co-coatomically supplemented and U is a fully invariant submodule of M then M/U is ⊕-co-coatomically supplemented. A ring R is left perfect if and only if R(N) is an ⊕-co-coatomically supplemented R-module. A projective module M is co-coatomically semiperfect if and only if M is ⊕-co-coatomically supplemented. A ring is semiperfect if and only if every finitely generated free R-module is co-coatomically semiperfect. © 2020 Elsevier B.V. All rights reserved.
Citation - Scopus: 1
Compact dual-band rectangular TE10 mode to circular TM01 mode converter for telemetry/telecommand applications in satellite communication: design equivalent circuit modeling mode level measurement technique and 3d printed manufacturing
(Turkiye Klinikleri, 2022-11-01) Esra Alkın; Ceyhan Türkmen; Mustafa Seçmen; Secmen, Mustafa; Türkmen, Ceyhan; Alkın, Esra
In this study the design of a dual-band mode converter which provides transition from rectangular waveguide TE10 mode to circular waveguide TM01 mode and operates simultaneously in telemetry/telecommand (TT&C) frequencies is presented along with its equivalent circuit and a mode level measurement technique. This dual-band converter is designed to uniformly excite TT&C slot antennas used in satellite communication with symmetric circular TM01 mode. The structure can work as a transceiver due to having one common rectangular waveguide feed. As a Ku-band application a converter giving high purity TM01 mode at circular waveguide at 11.75 GHz/TX and 13.75 GHz/RX center frequencies is designed and manufactured with 3D printing technology. Approximate equivalent circuit models of the designed structure are extracted by using lumped elements from simulated S-parameter results. In addition a measurement technique to detect the normalized power levels of different propagation modes in dual-band mode converter is applied on the manufactured structures to obtain transmission levels of circular TM01 mode and suppression levels of circular TE11 mode. It is revealed from the measurement results that while the designed structure gives more than 17.5 dB return loss and suppression of TE11 mode and less than 0.6 dB insertion loss of TM01 mode within 500 MHz bandwidth at TX band it gives more than 23 dB return loss and suppression of TE11 mode and less than 0.3 dB insertion loss of TM01 mode within 900 MHz bandwidth at RX band. © 2023 Elsevier B.V. All rights reserved.
Comparison of Substance Use and Personality Characteristics and Psychiatric Symptoms of Individuals Using Cannabis and Synthetic Cannabinoids with Healthy Controls
(TURKISH GREEN CRESCENT SOC, 2022-12-21) Hande Celikay Soyler; Ayse Ender Altintoprak
In this study substance use personality traits and psychiatric symptoms of individuals using cannabis and synthetic cannabinoid were examined and compared with healthy controls. A total of 52 participants who applied to Ege University Faculty of Medicine Department of Mental Health and Diseases Substance Addiction Treatment Center between March 2015 and June 2017 who used cannabis for at least 1 year in the past and 51 participants who used synthetic cannabinoids for at least 1 year in the past constituted the participant group with a history of substance use and 57 Ege University employees/students without any substance use history constituted the control group participants. The age range was determined as 18-54. Hacettepe Personality Inventory was used to evaluate the personality traits of the participants and the Symptom Screening Test-90 was used to examine the psychopathological symptom levels. Participants with a history of synthetic cannabinoid use evaluated by Hacettepe Personality Inventory had a significantly lower score on general adjustment personal adjustment social adjustment self-actualization emotional stability neurotic tendencies psychotic symptoms family relations social relations social norms antisocial tendencies sub-dimensions and they scored significantly higher in all Symptom Screening Test 90 sub-dimensions. The study suggests that adding social adaptation and psychoeducational programs to medical and psychosocial improvement studies in the field of addiction will increase success.
Citation - WoS: 3
Citation - Scopus: 4
Damping wide-area oscillations in power systems: A model predictive control design
(Turkiye Klinikleri Journal of Medical Sciences Talapapa Bulvary no. 102 Hamammonu 1 06230, 2018) Emrah Biyik; Munir Aminu Husein; Bıyık, Emrah; Huseın, Munir
Electromechanical oscillations in power systems have been observed ever since synchronous generators were interconnected to provide reliability and higher generation capacity and they have become a severe threat for the safe and economic operation of modern interconnected power grids. To dampen these oscillations wide-area damping controllers (WADCs) have been introduced by utilizing wide-area measurement systems and synchronized phasor measurement units. In this paper we present a systematic approach for designing WADCs using a model predictive control (MPC) technique to damp interarea oscillations in the power system. The MPC controller computes optimal control signals for the excitation system of a remote generator where it will supplement the local power system stabilizers that are used as damping controllers. The performance of the proposed approach has been assessed on the IEEE 16-generator 68-bus test system and it is shown that the interarea oscillations can be effectively and robustly damped under varying operation conditions. © 2018 Elsevier B.V. All rights reserved.
Discriminant-based bistability analysis of a TMG-induced lac operon model supported with boundedness and local stability results
(Turkiye Klinikleri Journal of Medical Sciences Talapapa Bulvary no. 102 Hamammonu 1 06230, 2016) Neslihan Avcu; Güleser Kalayci Demir; Ferhan Pekergin; Hakan Alyuruk; Levent Çavaş; Cüneyt Güzeliş
This paper presents the results of a theoretical and numerical study on the analysis of bistable behavior of the most studied gene regulatory network the lac operon in terms of the model parameters. The boundedness of the state variables for the considered model are demonstrated the parameter values providing the existence of the multiple equilibria and thus the bistable behavior are determined and a local stability analysis of the equilibria is performed. The parameter region yielding the existence of multiple equilibria is determined in an algebraic way based on discriminants. The model given in the state equation form is defined by the ordinary differential equations with the rational right-hand sides constituted within Hill and Michaelis-Menten approaches based on enzyme kinetics. The presented method can also be used in the parametric studies of other gene regulatory and metabolic networks given by state equations with rational right hand sides. © 2016 Elsevier B.V. All rights reserved.

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