Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12469/1248

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The 1921 Constitution and Beyond: Any Inspiration After 100 Years?
(Istanbul University Press, 2022) Arat, N.; Topukçu, A.
The 1921 Constitution has mostly been considered as a unique piece of legal document in Turkish Legal History with regard to the time it was written, the conditions under it was created, the necessity it touched and the era it changed. The 1921 Constitution had been assessed by scholars, bureaucrats, politicians and lawyers in different times from distinct perspectives. It has got special attention lately as regards to the discussions on constitution-making processes. Even after 100 years, many of its features inspire today's constitutional discussions as the 1921 Constitution touches even today's sociological, political and legal needs. In this context, this paper aims to assess the 1921 Constitution first by pointing out the unique features; then, gives try to answer a question posed whether the 1921 Constitution is a constitution itself, or not. This trial is done under the double constitution period discussions and by pulling out the deficiencies of the 1921 Constitution. Subsequently, the box of inspirational touches of the 1921 Constitution to 100 years beyond is opened. In that sense, it has been found that the understanding of sovereignty that brings it down to its origin “earth/humankind”, the idea of local democracy and the vision on fundamental rights and freedoms that open the door to modern understanding of rights on this part of the world, could be drawn/inherited for today's constitutional making processes. © 2022 Istanbul University Press. All Rights Reserved.
Citation - WoS: 12
Citation - Scopus: 15
Accurate Refinement of Docked Protein Complexes Using Evolutionary Information and Deep Learning
(Imperıal College Press, 2016) Akbal-Delibas, Bahar; Farhoodi, Roshanak; Pomplun, Marc; Haspel, Nurit
One of the major challenges for protein docking methods is to accurately discriminate native-like structures from false positives. Docking methods are often inaccurate and the results have to be refined and re-ranked to obtain native-like complexes and remove outliers. In a previous work we introduced AccuRefiner a machine learning based tool for refining protein-protein complexes. Given a docked complex the refinement tool produces a small set of refined versions of the input complex with lower root-mean-square-deviation (RMSD) of atomic positions with respect to the native structure. The method employs a unique ranking tool that accurately predicts the RMSD of docked complexes with respect to the native structure. In this work we use a deep learning network with a similar set of features and five layers. We show that a properly trained deep learning network can accurately predict the RMSD of a docked complex with 1.40 angstrom error margin on average by approximating the complex relationship between a wide set of scoring function terms and the RMSD of a docked structure. The network was trained on 35000 unbound docking complexes generated by RosettaDock. We tested our method on 25 different putative docked complexes produced also by RosettaDock for five proteins that were not included in the training data. The results demonstrate that the high accuracy of the ranking tool enables AccuRefiner to consistently choose the refinement candidates with lower RMSD values compared to the coarsely docked input structures.
Acoustic Design Guidelines for Adults With Intellectual Disability
(European Acoustics Association EAA, 2014) Şaher, Konca; Nijs, Lau; Hordijk, Truus
This paper concentrates on the acoustic design aspects of the living rooms in institutions for adults with intellectually disability. In the living rooms for adults with ID there is even a higher stress on the acoustics since they are more dependent on the acoustical environment compared to normal population. Moreover prevalence of hearing impairment among adults with ID is around 30% and in most cases it is not even recognised. Therefore the rooms for adults with ID need to be designed by taking into account the requirements of the hearing impaired. They need more favourable room acoustics to improve their communication and participation. This paper investigates three main themes: 1) Investigation of impact of building design tools on acoustical quality parameters and determination of most appropriate acoustical quality indicator that translates best into architectural practice for living rooms for adults with ID. 2) Investigation of the relation between user satisfaction and absorption amount in rooms for adults with ID by listening tests prepared from auralizations. 3) Development of architectural/acoustical design guidelines to provide optimal absorption amount for living rooms for adults with ID.
ACOUSTIC TRANSFORMATION OF ROCK-CUT CAVES INTO PERFORMANCE SPACES
(European Acoustics Association, EAA, 2023) Aslan,A.; Saher,K.; Tozoglu,A.E.
Cappadocia Region in Turkey is a center of attention as a tourism destination with its rock-cut caves, some of which are being used as performance spaces for concerts, festivals and local entertainment activities. However, these spaces are not fully investigated for their acoustic performance before being transformed into performance venues. This paper reports on the findings of an initial survey which presents a systematic mapping of the rock-cut caves used as performance spaces to locate, explore and document a sample of structures scattered in this historic district. A typological classification based on volume, size, type of tuff rock material and historical original use has been proposed and an acoustic analysis of some selected rock-cut caves has been carried out. The acoustic analysis included reverberation time calculations and simulations based on apparent volume, and tuff stone absorption characteristics, which were studied by other researchers in the area. © 2023 Aslan et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Adaptation To Nocturnal Intermittent Hypoxia in Sleep-Disordered Breathing: 2,3 Diphosphoglycerate Levels: a Preliminary Study
(2002) Öztürk, Levent Mukadder; Mansour, Banu; Pelin, Zerrin; Çelikoğlu, Firuz; Gökhan, Nuran
An inexpensive method for determining significant sleep-related hypoxemia would be beneficial for patients being investigated and treated for sleep-disordered breathing in order to distinguish hypoxic patients from those without nocturnal hypoxemia. Since 2,3 diphosphoglycerate (DPG) which profoundly affects dissociation of O2 from hemoglobin is an instrumental substance in determining the O2 affinity of blood it becomes important to consider in what extent the nocturnal intermittent hypoxemia may change the levels of 2,3 DPG. In this study we tested the hypothesis that 2,3 DPG levels of hypoxic SDB patients may be higher than that of nonhypoxic SDB patients and normal controls. Fourteen SDB patients were participated the study seven with hypoxia (hypoxic group) who spent more than 10 minutes during sleep with SaO2<90% (mean 71 minutes) and seven SDB patients (nonhypoxic group) who spent less than 10 minutes during sleep with SaO2<90% (mean 6 minutes). Seven healthy non-smoking subjects were included as a control group. After giving informed consent all participants underwent a venous blood sampling performed between 07:00 and 08:00 a.m. Blood 2,3 DPG levels were measured by using spectrophotometry. 2,3 DPG levels were 1.84±0.44 1.68±0.18 and 1.71±0.11 mmol/mL in hypoxic nonhypoxic and control groups respectively (p>0.05). In conclusion to our knowledge this is the first study that has evaluated 2,3 DPG levels in hypoxic and nonhypoxic types of SDB patients. Chronic intermittent hypoxia which is entirely a different entity from sustained hypoxia did not lead to increases in 2,3 DPG levels in both hypoxic and nonhypoxic SDB patients.
Citation - Scopus: 12
Affective Modulation of Working Memory Maintenance: the Role of Positive and Negative Emotions
(University of Economics and Human Sciences in Warsaw, 2021) Gokce,A.; Zinchenko,A.; Annac,E.; Conci,M.; Geyer,T.
The present study investigated the impact of task-irrelevant emotional images on the retention of information in spatial working memory (WM). Two experiments employed a delayed matching-to-sample task where participants had to maintain the locations of four briefly presented squares. After a short retention interval, a probe item appeared and participants were required to indicate whether the probe position matched one of the previously occupied square positions. During the retention interval, task-irrelevant negative, positive, or neutral emotional pictures were presented. The results revealed a dissociation between negative and positive affect on the participants’ ability to hold spatial locations in WM. While negative affective pictures reduced WM capacity, positive pictures increased WM capacity relative to the neutral images. Moreover, the specific valence and arousal of a given emotional picture was also related to WM performance: While higher valence enhanced WM capacity, higher levels of arousal in turn reduced WM capacity. Together, our findings suggest that emotions up- or down-regulate attention to items in WM and thus modulate the short-term storage of visual information in memory. © 2021 University of Finance and Management in Warsaw. All rights reserved.
Citation - Scopus: 1
Aluminum accumulation in treatment using submerged membrane electro-bioreactor of young landfill leachate: Statistical analysis
(Environmental Research & Technology (Online), 2020) Kurtoğlu Akkaya, Gülizar; Ayvaz Çavdaroğlu, Nur; Bilgili, Mehmet
Herein, landfill leachate containing high amount of organic matter, which is quite difficult to treat, was first treated using the new submerged membrane electro-bioreactor (SMEBR) system. Aluminum (Al) electrode was used for the treatment of leachate in the SMEBR and Al accumulation was detected. This study aims to examine Al accumulation in the treatment of leachate with high organic content in the SMEBR system. The Al values obtained were plotted on a graph using MS Excel, and Mann–Whitney U test was used to determine whether there is a statistical difference between the observed Al values. Also, correlations between Al accumulations and conductivity and TOC in SMEBR and SMBR were evaluated. Resultantly, it was found that relationship between Al and conductivity is very weak, correlation between Al and TOC% is a weak-moderate, the Al accumulation in the SEMBR has a linear relationship with time and there is a very strong correlation between the two variables (R2= 0.7591). Its correlation with time in the SMBR is moderate (R2= 0.3316). MS Excel 2016 and Minitab 16.0 programs were utilized in the statistical analyses.
Citation - Scopus: 2
Analyses of Literary Texts by Using Statistical Inference Methods
(CEUR-WS, 2019) Yavuz, Mehmet Can
If a road map had to be drawn for Computational Criticism and subsequent Artificial Literature, it would have certainly considered Shakespearean plays. Demonstration of these structures through text analysis can be seen as both a naive effort and a scientific view of the characteristics of the texts. In this study, the textual analysis of Shakespeare plays was carried out for this purpose. Methodologically, we consecutively use Latent Dirichlet Allocation (LDA) and Singular Value Decomposition (SVD) in order to extract topics and then reduce topic distribution over documents into two-dimensional space. The first question asks if there is a genre called Romance between Comedy and Tragedy plays. The second question is, if each character’s speech is taken as a text, whether the dramatic relationship between them can be revealed. Consequently, we find relationships between genres, also verified by literary theory and the main characters follow the antagonisms within the play as the length of speech increases. Although the results of the classification of the side characters in the plays are not always what one would have expected based on the reading of the plays, there are observations on dramatic fiction, which is also verified by literary theory. Tragedies and revenge dramas have different character groupings.
Citation - WoS: 1
Citation - Scopus: 2
Analysis of Local and Centralized Control of Pv Inverters for Voltage Support in Distribution Feeders
(IEEE, 2021) Ceylan, Oguzhan; Paudyal, Sumit; Pisica, Ioana
Higher photovoltaic penetration on distribution system brings operational challenges including overvoltage issues. With smart inverters, efficient voltage control can be achieved through adjusting active/reactive powers of inverters. However, reactive power may not be as effective as active power in regulating voltage due to high R/X ratio of distribution networks. Thus, active power curtailment (APC) techniques in coordination with reactive power control are required in distribution networks. In this study, we aim to evaluate the performances of a sensitivity based method and an optimal power flow (OPF) based centralized method of reactive power control (in coordination with APC) from inverters in managing voltage profile on distribution networks. We performed simulations on a 730-node MV/LV system upto 100% PV penetration. Based on the case studies using different penetration levels of PVs, we observed that: a) sensitivity based method is not always able to solve overvoltage issues and energy curtailments are high, and b) OPF-based method can ensure that voltage remains within the operational bound with significantly less energy curtailment.
Citation - Scopus: 4
Analysis of the Effects of Intermodal Terminals for the Solutions of Urban Logistics Problems in Istanbul City
(Springer Science and Business Media B.V., 2016) Görçün,Ö.F.
We analyzed the urban logistics problems in Istanbul City, and we tried to show the solutions of these problems thanks to intermodal freight terminals. Istanbul is a center of trade, tourism, and industry; 60 % of total logistics activities take place in Istanbul. At the same time, capacities, infrastructures, and performance of logistics system are affecting the logistics systems and industries of European countries and neighborhoods. However, solving the urban logistics problems have become regional and global ones and especially European countries, industries, and their commercial actors cannot ignore these problems. In addition to urban freight flows, high volume of international and domestic cargo flows causes different problems related to urban logistics. On the other hand, Istanbul has the different logistics nodes as airports, organized industrial zones, business centers, whereas logistics networks and links between nodes are not required level. This study focuses on the logistics nodes, relationships, opportunities and facilities of transportation, and effects of intermodal freight terminals to solving problems of the insufficient connections between these nodes. © Springer International Publishing Switzerland 2016.
Analyzing the Structure of Groupoids of Order 3, 4, and 5 Using PCA
(Springer Science and Business Media Deutschland GmbH, 2025) Mollakuqe, E.; Daǧ, H.; Mollakuqe, V.; Dimitrova, V.
Groupoids are algebraic structures, which generalize groups by allowing partial symmetries, and are useful in various fields, including topology, category theory, and algebraic geometry. Understanding the variance explained by Principal Component Analysis (PCA) components and the correlations among variables within groupoids can provide valuable insights into their structures and relationships. This study aims to explore the use of PCA as a dimensionality reduction technique to understand the variance explained by different components in the context of groupoids. Additionally, we examine the interrelationships among variables through a color-coded correlation matrix, facilitating insights into the structure and dependencies within groupoid datasets. The findings contribute to the broader understanding of data representation and analysis in mathematical and computational frameworks. © 2025 Elsevier B.V., All rights reserved.
Citation - WoS: 7
Citation - Scopus: 7
Anytime. Everywhere. Mobile Learning in Higher Education: Creating a Gis Course
(Springer-Verlag Berlin, 2012) Erkollar, Alptekin; Oberer, Birgit
The course concepts introduced in this contribution were implemented in 2011 in a university in Turkey and show an approach for integrating mobile learning modules in higher education. The results of the course show the advantages as well as potential for improvement of the system and the use of it in higher education.
The Applicable Law to Proprietary Issues on Digital Assets Considering Recent Developments: Lex Rei Sitae or Not?
(Istanbul University Press, 2025) Ömeroglu, E.
The legal nature of digital assets and the applicable law for digital assets have been debated in recent years in many legal systems, including Turkish law. The inability to reach a definite conclusion on evaluating the legal nature of digital assets in Turkish law makes it difficult to determine the applicable law to proprietary issues on digital assets in private international law. In the context of conflict of laws rules, determining the applicable law for rights over digital assets depends more on the medium in which the asset is recorded than its function. National legislators and legal institutions are seeking new connecting factors beyond the traditional lex rei sitae principle, given that digital assets predominantly exist in electronic environments. Therefore, our study aims to address how to bridge the gap in Turkish private international law concerning the applicable law for digital asset proprietary issues by drawing on comparative law developments. © 2025 Elsevier B.V., All rights reserved.
Apprenticeship-Type Learning in the Local: Insights from a Cooperative Weaving Practice for Design Education
(Springer Nature, 2023) Öz, G.; Timur, Ş.
A growing area in design research concerns learning from local practices and diversifying design’s knowledge space. By understanding and documenting how women in a village in Turkey learn the craft of weaving, this paper reformulates the relationship between the design field and the local context as learning from the local and aims to contributes to the design education field. During the summers of 2017, 2018, and 2019, fieldwork using the participant observation method was conducted in the village. The detailed account of the learning process in this local weaving practice allows us to define this learning as “apprenticeship type learning in the local.” The practice consists of a process in which the forms of learning and teaching are inseparably interwoven with socio-spatial elements. It draws together flexible learning processes where the teaching moments blur and students learn in action in a dialogical exchange through observing and making. During these interactions, the importance of considering the cooperative and social aspects of the learning arises: not only technical knowledge, but also social values and beliefs are transferred in an interdependent process. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Atomic Collisions and Free Lepton Pair Production
(2005) Güçlü, Mehmet Cem; Yılmaz, Melek
In this work we have calculated the total cross sections of electron-positron pair production for the collisions of fully stripped gold ions for various energies. We have also compared our calculation with other methods.
Citation - Scopus: 7
Autonomous Robots and Utilization in Logistics Process
(Springer Nature, 2022) Görçün, Ö.F.
The autonomous robots are required in our logistics operations? It is one of the crucial questions that asked to him by logistics managers. Depending on technological developments, some requirements, which can be defined as speed, lower cost, and high quality, have become more important to stay in a highly competitive environment for companies and supply chains compared with the past. Autonomous robotic systems can help to reach these aims. They can provide a more safe working environment in warehouses, distribution centers, and other logistics facilities. İn addition to that, they can provide opportunities for carrying out lower costly, speedy, and quality logistics operations. Furthermore, robotic systems continue to improve, and creating more specific robotics that will be used in the field of logistics will be possible in the near future. Moreover, robotic systems becoming smart and autonomous thanks to artificial intelligence, developed sensors, and trainability. In the future, requirements for human force may reduce in logistics operations since robotics may carry out logistics activities autonomously depending on these technological improvements. Finally, autonomous robots can provide opportunities for carrying out more quality and excellent logistics operations to logistics managers and staff in the near future. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Citation - WoS: 5
Citation - Scopus: 5
Block Elimination Distance
(Springer Japan Kk, 2022) Diner, Oznur Yasar; Giannopoulou, Archontia C.; Stamoulis, Giannos; Thilikos, Dimitrios M.
We introduce the parameter of block elimination distance as a measure of how close a graph is to some particular graph class. Formally, given a graph class g, the class B(G) contains all graphs whose blocks belong to G and the class A(G) contains all graphs where the removal of a vertex creates a graph in G. Given a hereditary graph class G, we recursively define G((k)) so that G((0)) = B(G) and, if k >= 1 G((k)) B(A(G((k-1))) ) N We show that, for every nontrivial hereditary class g, the problem of deciding whether G is an element of G((k)) is NP-complete. We focus on the case where G is minor-closed and we study the minor obstruction set of G((k)) i.e., the minor-minimal graphs not in G((k)). We prove that the size of the obstructions of G((k)) is upper bounded by some explicit function ofk and the maximum size of a minor obstruction of G. This implies that the problem of deciding whether G is an element of G((k)) is constructively fixed parameter tractable, when parameterized by k. Finally, we give two graph operations that generate members of G((k)) from members of G((k -1)) and we prove that this set of operations is complete for the class O of outerplanar graphs.Please check and confirm if the authors Given and Family names have been correctly identified for author znur YaYar Diner. All authors names have been identified conectly. Please confirm if the corresponding author is correctly identified. Amend if necessary.This is correct
Citation - Scopus: 1
Block Elimination Distance
(Springer Science and Business Media Deutschland GmbH, 2021) Diner, Ö.Y.; Giannopoulou, A.C.; Stamoulis, G.; Thilikos, D.M.
We introduce the parameter of block elimination distance as a measure of how close a graph is to some particular graph class. Formally, given a graph class G, the class B(G) contains all graphs whose blocks belong to G and the class A(G) contains all graphs where the removal of a vertex creates a graph in G. Given a hereditary graph class G, we recursively define G( k ) so that G(0 )= B(G) and, if k? 1, G( k )= B(A(G( k - 1 )) ). The block elimination distance of a graph G to a graph class G is the minimum k such that G? G( k ) and can be seen as an analog of the elimination distance parameter, defined in [J. Bulian & A. Dawar. Algorithmica, 75(2):363–382, 2016], with the difference that connectivity is now replaced by biconnectivity. We show that, for every non-trivial hereditary class G, the problem of deciding whether G? G( k ) is NP-complete. We focus on the case where G is minor-closed and we study the minor obstruction set of G( k ) i.e., the minor-minimal graphs not in G( k ). We prove that the size of the obstructions of G( k ) is upper bounded by some explicit function of k and the maximum size of a minor obstruction of G. This implies that the problem of deciding whether G? G( k ) is constructively fixed parameter tractable, when parameterized by k. Our results are based on a structural characterization of the obstructions of B(G), relatively to the obstructions of G. Finally, we give two graph operations that generate members of G( k ) from members of G( k - 1 ) and we prove that this set of operations is complete for the class O of outerplanar graphs. This yields the identification of all members O? G( k ), for every k? N and every non-trivial minor-closed graph class G. © 2021, Springer Nature Switzerland AG.
Citation - WoS: 4
Citation - Scopus: 5
Broadband Equalizer Design With Commensurate Transmission Lines Via Reflectance Modeling
(IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, 2008) Şengül, Metin Y.; Yarman, Sıddık Binboğa
In this paper an alternative approach is presented to design equalizers (or matching networks) with commensurate (or equal length) transmission lines. The new method automatically yields the matching network topology with characteristic impedances of the commensurate lines. In the implementation process of the new technique first the driving point impedance data of the matching network is generated by tracing a pre-selected transducer power gain shape without optimization. Then it is modelled its it realizable bounded-real input reflection coefficient in Richard domain which ill turn yields the desired equalizer topology with line characteristic impedances. This process results in an excellent initial design for the commercially available computer aided design (CAD) packages to generate final circuit layout for fabrication. An example is given to illustrate the utilization of the new method. It is expected that the proposed design technique is employed as it front-end to commercially available computer aided design (CAD) packages which generate the actual equalizer circuit layout with physical dimensions for mass production.
C# Based Media Center
(2013) Arsan, Taner; Sen, Rasim; Ersoy, Barkan; Devri, Kadir Kadirhan
In this paper, we design and implement a novel all-in-one Media Center that can be directly connected to a high-definition television (HDTV). C# programming is used for developing modular structured media center for home entertainment. Therefore it is possible and easy to add new limitless number of modules and software components. The most importantly, user interface is designed by considering two important factors; simplicity and tidiness. Proposed media center provides opportunities to users to have an experience on listening to music/radio, watching TV, connecting to Internet, online Internet videos, editing videos, Internet connection to pharmacy on duty, checking weather conditions, song lyrics, CD/DVD burning, connecting to Wikipedia. All the modules and design steps are explained in details for user friendly cost effective all-in-one media center.

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