TR-Dizin İndeksli Yayınlar Koleksiyonu
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Browsing TR-Dizin İndeksli Yayınlar Koleksiyonu by Publication Index "Scopus"
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Article 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.Article Citation - WoS: 2Citation - Scopus: 13D self-assemble formation of molybdenum disulfide (MoS2)-doped polyacrylamide (PAAm) composite hydrogels(Tubitak Scientific & Technological Research Council Turkey, 2022) Durmaz, Sumeyye; Yildiz, Ekrem; Uysal, Bengu Ozugur; Pekcan, OnderPolyacrylamide (PAAm), a renowned member of the hydrogel class, has many uses throughout a wide range of industrial processes, including water absorbed diapers, contact lenses, wastewater treatment, biomedical applications such as drug delivery vehicles and tissue engineering because of its physical stability, durability, flexibility easier shaping, and so on. PAAm also provides new functionalities after the incorporation of inorganic structures such as molybdenum disulfide (MoS2). During the copolymerization process, the transmittance of all samples reduced significantly after a particular time, referred to as the gel point. Microgels form a tree above the gel point as projected by Flory-Stockmayer classical theory. Because of microgels positioned at the junction points of the Cayley tree, the addition of MoS2 results in strong intramolecular crosslinking and looser composites. Moreover, fractal geometry provides a quantitative measure of randomness and thus permits characterization of random systems such as polymers. Fractal dimension of these polymer composites is calculated from power-law-dependent scattered intensity. It was also confirmed that a hydrogel rapidly formed within a few seconds, indicating a 3D network formation inside the gel. These materials may have a great potential for application in wearable and implantable electronics due to this highly desired 3D self-assemble feature.Article Citation - WoS: 4Citation - Scopus: 8Accurate Indoor Positioning With Ultra-Wide Band Sensors(Tubitak, 2020) Arsan, TanerUltra-wide band is one of the emerging indoor positioning technologies. In the application phase, accuracy and interference are important criteria of indoor positioning systems. Not only the method used in positioning, but also the algorithms used in improving the accuracy is a key factor. In this paper, we tried to eliminate the effects of off-set and noise in the data of the ultra-wide band sensor-based indoor positioning system. For this purpose, optimization algorithms and filters have been applied to the raw data, and the accuracy has been improved. A test bed with the dimensions of 7.35 m x 5.41 m and 50 cm x 50 cm grids has been selected, and a total of 27,000 measurements have been collected from 180 test points. The average positioning error of this test bed is calculated as 16.34 cm. Then, several combinations of algorithms are applied to raw data. The combination of Big Bang-Big Crunch algorithm for optimization, and then the Kalman Filter have yielded the most accurate results. Briefly, the average positioning error has been reduced from 16.34 cm to 7.43 cm.Article Citation - Scopus: 1An Alternative Approach To Design Lumped Element Delay Equalizers(Istanbul Univ Fac Engineering, 2015) Şengül, Metin Y.In this paper an algorithm has been proposed to design lumped element delay equalizers which is considered as a single block as opposed to the existing methods in literature. Then after obtaining the desired delay performance the designed delay equalizer is divided and realized as cascaded first-order and/or second-order all-pass circuits. An example is given to illustrate the utilization of the proposed algorithm.Article Citation - Scopus: 1Aluminum 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, MehmetHerein, 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.Article Citation - WoS: 1Citation - Scopus: 1Assesment of soft error sensitivity of power flow analysis(Gazi Univ, Fac Engineering Architecture, 2023) Yetkin, Emrullah FatihToday's power systems are large and interconnected to each other with many buses, lines, loads, and generators. Even the solution of a single snapshot of the system for specific conditions requires the solution of systems of equations with large sizes. Thus, to obtain the results in a reasonable time for large problems like electrical power flow simulations, modern large computational environments should be employed. However, because of the increasing number of components in the modern computational environment, the possibility of soft errors also increases. Soft errors can be defined as failures arising from several fluctuations due to x-rays, cosmic particle effects, etc. These types of errors usually appear at any time of computation as a bit-flip in any floating-point operations. In this paper, we will investigate the soft-error effects on large-scale power flow simulations. Generally, power flow calculations are performed by using Newton Raphson Method. The system is modeled by nonlinear equations and the solution process requires a linear solver is employed to take the inverse of the Jacobian matrix at each iteration. In this study, the soft-error sensitivity of the numerical methods used in load flow was examined, and the problems that may be encountered were revealed.Article Citation - WoS: 1Citation - Scopus: 1Bayesian Estimation of Discrete-Time Cellular Neural Network Coefficients(TUBITAK Scientific & Technical Research Council Turkey, 2017) Özer, Hakan Metin; Özmen, Atilla; Şenol, HabibA new method for finding the network coefficients of a discrete-time cellular neural network (DTCNN) is proposed. This new method uses a probabilistic approach that itself uses Bayesian learning to estimate the network coefficients. A posterior probability density function (PDF) is composed using the likelihood and prior PDFs derived from the system model and prior information respectively. This posterior PDF is used to draw samples with the help of the Metropolis algorithm a special case of the Metropolis--Hastings algorithm where the proposal distribution function is symmetric and resulting samples are then averaged to find the minimum mean square error (MMSE) estimate of the network coefficients. A couple of image processing applications are performed using these estimated parameters and the results are compared with those of some well-known methods.Article Broadband Double-Matching Via Lossless Unsymmetrical Lattice Networks(Istanbul University, 2012) Şengül, Metin Y.In this paper a broadband double-matching network design algorithm has been presented. In the network an unsymmetrical lattice network has been used. The branch impedances of the lattice network are composed of singly terminated lossless LC networks. After giving the procedure its usage has been illustrated via an example.Article Broadband Matching Via Reflection Coefficient Modeling(AVES YAYINCILIK, 2016) Şengül, Metin Y.[Abstract Not Available]Article Çağının Mimarlık Ortamına Katkılarıyla Diyarbakır Artuklu Sultanı Nâsırüddin Melik Salih Mahmud (1200-1222)(Istanbul Univ, Research Inst. Turkology, Dept Art History, 2025) Alper, MehmetNâsırüddin Melik Salih Mahmud (M 1200-1222), Diyarbakır ve Mardin Bölgesinde 1102-1409 yılları arasında üç kol hâlinde hüküm sürmüş Artuklu Beyliği'nin Hasankeyf ve Diyarbakır kolunun sultanıdır. Hükümdarlığı süresince imar faaliyetlerine önem veren Nâsırüddin Melik Salih Mahmud’un siyasi kimliğinin ötesinde çağının önemli yapılarının hem banisi hem de mimarı olduğu yapıların inşa kitabelerinden açıkça anlaşılmaktadır. Yedi Kardeş Burcu (M 1208-1209) ve Devegeçidi Köprüsü, Nâsırüddin Melik Salih Mahmud’un planları doğrultusunda inşa edildikleri kitabelerindeki tersim (tasarımı yapan) ifadeleriyle belirtilen iki mimari eseridir. Her ne kadar inşa kitabelerinde belirtilmemiş olsa da Ulu Beden Burcu ve Artuklu Sarayı’nın mimari özellikleri ile Nâsırüddin Melik Salih Mahmud’u simgelediği düşünülen çift başlı kartal armalı süslemeleri göz önünde bulundurulduğunda yine onun tasarımıyla inşa edildiği kabul edilmektedir. 1200 – 1222 yılları arasında hüküm sürmüş Artuklu Sultanı Nâsırüddin Melik Salih Mahmud dönemi imar faaliyetle- rinin ele alındığı bu çalışmada, bu dönemde Diyarbakır’da inşa edilen yapılar incelenmiştir. Literatür çalışmalarıyla edinilen bilgiler, “Diyarbakır Surları Koruma Projesi” kapsamında gerçekleştirilen restorasyon çalışmaları sırasında elde edilen bulgularla birlikte değerlendirilerek, Nâsırüddin Melik Salih Mahmud dönemi çok yönlü olarak irdele- nerek bani-mimar ilişkisi ve yöneticinin tasarım sürecine katkısı ortaya konulmaya çalışılmıştır. Ayrıca, Diyarbakır’ın en eski kilisesi olduğu kabul edilen ve MS 3 yüzyıla tarihlendirilen St. George Kilisesi’nin Artuklu Dönemi eki olan avlu bölümünü tarihlendirmeye ve inşa edildiği dönemdeki işlevi konusuna açıklık getirmesi amaçlanmıştır.Article Citation - Scopus: 1Changing the Identity of a Place by Changing Street Names: the Process of Renaming the Streets of Üsküdar Between 1927-1934(Istanbul Teknik Universitesi, Faculty of Architecture, 2023) Dalgiç, E.N.; Yildirim Okta, B.Street names are part of our everyday lives. People constantly encounter street signs during their daily practices. Their visible position in the urban landscape makes street names suitable to use as visual/linguistic signifiers of cultures, histories, values, and ideologies. Renaming streets is one of the first actions of the new regimes to create their ideological hegemony in the territories they rule. It is essential to resolve the conflicts between urban memory and the sovereign’s history to legitimize their geographical claims by changing anything that does not match with their mental constructs in the urban landscape. This article provides a critical discourse analysis of the relationship between space, place, identity, urban memory, and street names by examining the alteration of street names in Üsküdar, a district of Istanbul, between 1927 and 1934. Even though Üsküdar was one of the regions where the minorities lived exceedingly in the Ottoman period, in the current Üsküdar identity, there are only a few traces left of its former inhabitants. Hence, in terms of redefining identity, Üsküdar can be considered a prominent example compared to the other regions the minorities lived in Istanbul. The primary source for this inquiry is Osman Nuri Ergin’s İstanbul Şehri Rehberi (Istanbul City Guide), which was published in 1934. Archival documents and newspaper articles about street name changes are also used in this research. The relationship between socio-political transformation in Üsküdar and changes in urban toponymy is investigated in this study. © 2023, Istanbul Teknik Universitesi, Faculty of Architecture. All rights reserved.Article Citation - WoS: 3Citation - Scopus: 4Comparative Classification Performances of Filter Model Feature Selection Algorithms in Eeg Based Brain Computer Interface System(Gazi Univ, Fac Engineering Architecture, 2023) Bulut, Cem; Balli, Tugce; Yetkin, E. FatihBrain-computer interface (BCI) systems enable individuals to use a computer or assistive technologies such as a neuroprosthetic arm by translating their brain electrical activity into control commands. In this study, the use of filter-based feature selection methods for design of BCI systems is investigated. EEG recordings obtained from a BCI system designed for the control of a neuroprosthetic device are analyzed. Two feature sets were created; the first set was band power features from six main frequency bands (delta (1.0-4 Hz), theta (4-8 Hz), alpha (8-12 Hz), beta (12-25 Hz), high-beta (25-30Hz) and gamma (30-50 Hz)) and the second set was band power features from ten frequency sub-bands (delta (1-4 Hz), theta (4-8 Hz), alpha1 (8-10 Hz), alpha2 (10-12 Hz), beta1 (12-15 Hz), beta2 (15-18 Hz), beta3 (18-25 Hz), gamma1 (30-35 Hz), gamma2 (35-40 Hz), gamma3 (40-50 Hz)). Ten filter-based feature selection methods are investigated along with linear discriminant analysis, random forests, decision tree and support vector machines algorithms. The results indicate that feature selection methods leads to a higher classification accuracy and eigen value centrality (Ecfs) and infinite feature selection (Inffs) methods have consistently provided higher accuracy rates as compared to rest of the feature selection methods.Article Citation - Scopus: 4A Comparative Study on Denoising from Facial Images Using Convolutional Autoencoder(Gazi Univ, 2023) Darici, Muazzez Buket; Erdem, ZekiDenoising is one of the most important preprocesses in image processing. Noises in images can prevent extracting some important information stored in images. Therefore, before some implementations such as image classification, segmentation, etc., image denoising is a necessity to obtain good results. The purpose of this study is to compare the deep learning techniques and traditional techniques on denoising facial images considering two different types of noise (Gaussian and Salt&Pepper). Gaussian, Median, and Mean filters have been specified as traditional methods. For deep learning methods, deep convolutional denoising autoencoders (CDAE) structured on three different optimizers have been proposed. Both accuracy metrics and computational times have been considered to evaluate the denoising performance of proposed autoencoders, and traditional methods. The utilized standard evaluation metrics are the peak signal to noise ratio (PSNR) and structural similarity index measure (SSIM). It has been observed that overall, while the traditional methods gave results in shorter times in terms of computation times, the autoencoders performed better concerning the evaluation metrics. The CDAE based on the Adam optimizer has been shown the best results in terms of PSNR and SSIM metrics on removing both types of noise.Article Citation - WoS: 8Computational International Relations What Can Programming, Coding and Internet Research Do for the Discipline?(Dış Politika ve Barış Araştırmaları Merkezi, İhsan Doğramacı Barış Vakfı, 2019) Ünver, Hamid AkınComputational Social Science emerged as a highly technical and popular discipline in the last few years, owing to the substantial advances in communication technology and daily production of vast quantities of personal data. As per capita data production significantly increased in the last decade, both in terms of its size (bytes) as well as its detail (heartrate monitors, internet-connected appliances, smartphones), social scientists’ ability to extract meaningful social, political and demographic information from digital data also increased. A vast methodological gap exists in ‘computational international relations’, which refers to the use of one or a combination of tools such as data mining, natural language processing, automated text analysis, web scraping, geospatial analysis and machine learning to provide larger and better organized data to test more advanced theories of IR. After providing an overview of the potentials of computational IR and how an IR scholar can establish technical proficiency in computer science (such as starting with Python, R, QGis, ArcGis or Github), this paper will focus on some of the author’s works in providing an idea for IR students on how to think about computational IR. The paper argues that computational methods transcend the methodological schism between qualitative and quantitative approaches and form a solid foundation in building truly multi-method research design.Article Citation - Scopus: 1Concept of Legal Aid in Civil Litigation in Accordance With the Decisions of the European Court of Human Rights(Istanbul University Press, 2023) Yardim, M.E.Access to a fair trial is a fundamental human right that has been addressed both in international law and in the context of the European Convention on Human Rights (ECHR). Legal aid (free or affordable legal support/assistance/service) is evaluated as one of the elements of a fair trial. The well-known sixth article of the ECHR refers directly to legal aid. However, the third paragraph of ECHR art. 6 issues only criminal offenses. The European Court of Human Rights (ECtHR) implies the right to free legal assistance (legal aid) in civil cases. In our study, we will focus on the term of legal aid, types of legal aid and main legal aid systems, features of legal aid in civil matters, subject of legal aid and litigation costs and the procedure of legal aid application and who will be granted by legal aid in civil litigation. © Istanbul University Press. All Rights Reserved.Article Considerations and Confusions About Theregulatory Focus Theory and a Future Agendafor Researchers in Marketing(Boğaziçi Üniversitesi, İktisadi ve İdari Bilimler Fakültesi, 2017) Merdin-Uygur, EzgiThe regulatory focus theory is the mark of a paradigm shift away from a unidimensional hedonism towards a multiplicity of regulatory foci. It possesses great explanatory power; however a lot remains unresolved despite a promising body of empirical work. This paper highlights various considerations concerning the conceptual and comparative qualities of the regulatory focus theory. The discussion moves into the intersection of regulatory focus and consumer behavior literature, briefly summarizing the findings and followed by a number of propositions to be tested for future research.Article Citation - WoS: 1Citation - Scopus: 1Covid-19 Modeling Based on Real Geographic and Population Data(Tubitak Scientific & Technological Research Council Turkey, 2023) Baysazan, Emir; Berker, A. Nihat; Mandal, Hasan; Kaygusuz, HakanBackground/aim: Intercity travel is one of the most important parameters for combating a pandemic. The ongoing COVID-19 pandemic has resulted in different computational studies involving intercity connections. In this study, the effects of intercity connections during an epidemic such as COVID-19 are evaluated using a new network model. Materials and methods: This model considers the actual geographic neighborhood and population density data. This new model is applied to actual Turkish data by means of provincial connections and populations. A Monte Carlo algorithm with a hybrid lattice model is applied to a lattice with 8802 data points. Results: Around Monte Carlo step 70, the number of active cases in Turkiye reaches up to 8.0% of the total population, which is followed by a second wave at around Monte Carlo step 100. The number of active cases vanishes around Monte Carlo step 160. Starting with Istanbul, the epidemic quickly expands between steps 60 and 100. Simulation results fit the actual mortality data in Turkiye. Conclusion: This model is quantitatively very efficient in modeling real-world COVID-19 epidemic data based on populations and geographical intercity connections, by means of estimating the number of deaths, disease spread, and epidemic termination.Article Critically Queer yet Politically Affirmative Engagements with Human Rights(Istanbul University Press, 2024) Güner, Remzi OrkunConsidering recent queer engagements with international human rights, this article argues that emerging attempts at queering rights have often resulted in framing queer critique into the normativity of human rights. This article critiques this tendency, suggesting that queer engagement with rights can be critical yet (potentially) affirmative. It shows that queer critique, understood as non-essentialist politics, can contribute to contemporary critical human rights studies and their analyses of identity-producing functions of rights. In this way, the paper engages not only with the subject paradox of the rights discourse but also with queer responses to identity-based rights claims. I argue that queer critiques, shifting the focus from ontology to politics, encourage an affirmative engagement with framings of rights by considering identities as political claims, understanding rights not in ontological terms but as instruments for shifting temporary strategies in practice. The arena of rights, a site where debates about the definitions of human are contested, is a crucial space for deploying non-essentialist politics. In this context, the article refers to queer as a critical method in deploying rights to reduce the disciplinary effects of identities, helping us to free ourselves, our engagements with others, and politics from the eyes of the Normative.Article Citation - WoS: 9Citation - Scopus: 12Debating Eurasia: Political Travels of a Geographical Concept in Turkey(Uluslararası İlişkiler Konseyi Derneği, 2019) Yanık, Lerna K.This article reviews the ways in which various actors in Turkey have used the terms 'Eurasia' and 'Eurasianism' since the end of the Cold War. It presents two arguments. First, compared to Russian Eurasianism, it is difficult to talk about the existence of a 'Turkish Eurasianism'. Yet, the article employs the term Turkish Eurasianism as a shorthand to describe the ways in which Eurasia and Eurasianism are employed in Turkey. Second, Turkish Eurasianism is nothing but the use or instrumentalization of Eurasia to create a geopolitical identity for Turkey that legitimizes its political, economic, and strategic interests primarily in the post-Soviet space, but, from time to time, also in the Balkans and Africa. Various Turkish state and non-state actors have used Eurasia to mean different things and justify different goals: reaching out to Turkic Republics, being pro-Russian, creating a sphere of influence in former Ottoman lands, or, recently, cloaking anti-Western currents.Article Citation - WoS: 4Citation - Scopus: 5Development of a Supervised Classification Method To Construct 2d Mineral Maps on Backscattered Electron Images(Tubitak, 2020) Camalan, Mahmut; Çavur, MahmutThe Mineral Liberation Analyzer (MLA) can be used to obtain mineral maps from backscattered electron (BSE) images of particles. This paper proposes an alternative methodology that includes random forest classification, a prospective machine learning algorithm, to develop mineral maps from BSE images. The results show that the overall accuracy and kappa statistic of the proposed method are 97% and 0.94, respectively, proving that random forest classification is accurate. The accuracy indicators also suggest that the proposed method may be applied to classify minerals with similar appearances under BSE imaging. Meanwhile, random forest predicts fewer middling particles with binary and ternary composition, but the MLA predicts more middling particles only with ternary composition. These discrepancies may arise because the MLA, unlike random forest, may also measure the elemental compositions of mineral surfaces below the polished section.
