WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12469/4465

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Citation - Scopus: 1
3d Self-Assemble Formation of Molybdenum Disulfide $(mos_2 )-Doped$ Polyacrylamide (paam) Composite Hydrogels
(Tubitak, 2022) Durmaz, Sümeyye; Yıldız, Ekrem; Uysal, Bengü Özuğur; Pekcan, Önder
Polyacrylamide (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 $(MoS_2 )$. 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 $MoS_2$ 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.
Citation - WoS: 2
Citation - Scopus: 1
3D 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, Onder
Polyacrylamide (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.
5403 Sayılı Kanun Çerçevesinde Terekedeki Tarım Arazilerinin Devredilmesi Karşısında Muris Muvazaası
(Istanbul Univ, 2020) Senol, A. Nilay; Kazmacı, Özge Uzun; Şenol, Nilay
The Law on Protection of Soil and Land Use, numbered 5403, aims to protect the unity of agricultural lands, and to prevent the division of the soil with inheritance. This law stipulates first, the possibility regarding the giving over of the agricultural land in succession to one or more heirs, to a family partnership, to a limited liability company or to a third person with the consensus of the heirs and second, in case of disagreement, the judge shall decide whether to leave the agricultural land to a competent heir or to sell the land. Furthermore, according to this law, the competent heir to whom the agricultural land will be left can be determined by means of testamentary disposition. It is possible and also valid within the legal constraints that the testator can also transfer the agricultural land to one of the heirs while he is alive. It is arguable whether this transaction can be considered as the testator’s simulation or not, if this transaction has also been made with a simulated transaction. Some principles are set out by the Supreme Court in terms of the simulation of the testator, and although these principles and decisions are criticized by the doctrine, such cases are held by these principles. The purpose and the regulations of the Law numbered 5403 shall be taken into consideration in determining testator’s simulation
Ab Hukuk Düzeni ve Emca’da Anonim Ortaklıklarda Çoğunluğun Kötüye Kullanımının Etkilerinin Azaltılması: İzole ve Halka Kapalı Türk Anonim Ortaklıklarında Azınlığın Korunması İçin Esinlenmek Mümkün Mü?
(Istanbul Univ, Fac Law, 2024) Görmez, Onur; Goermez, Onur
AB mevzuatında, çoğunluğun kötüye kullanılması hususunu düzenleyen genel bir hüküm bulunmamaktadır. Üye devletlerde ise konuya dair iki ayrı yaklaşım bulunmaktadır. Bunlardan Fransa’da kabul gören çift eşikli yaklaşım olarak adlandırılabilecek ilki hem azınlığın hem de ortaklığın çıkarının zedelenmesini aramaktadır. Almanya ve İskandinav ülkeleri gibi bazı ülkelerde kabul gören tek aşamalı yaklaşım olarak adlandırılabilecek diğer yaklaşımda yalnızca azınlığın çıkarının zedelenmesi yeterli görülmektedir. AB düzenlemeleri de dikkate alınarak akademisyenler tarafından hazırlanan bir model yasa çalışması olan EMCA’da da kendisine yer bulan ikinci yaklaşım azınlık pay sahipleri için daha iyi bir koruma sunmaktadır; özellikle izole ve halka kapalı anonim ortaklıkların azınlık pay sahipleri yönünden. Adalet Divanı’nın Audiolux kararıyla da ortaya konduğu üzere AB Hukuku’nda pay sahipleri yönünden uygulama alanı bulacak genel geçer bir eşit işlem ilkesi söz konusu değildir. EMCA’da olduğuna benzer şekilde TTK m.357’de ise eşit şartlardaki pay sahiplerinin eşit işleme tabi tutulması gerekliliğini öngören hüküm uyarınca, Türk hukukunda da ortaklıkta çoğunluğun kötüye kullanılmasının tartışma konusu olduğu hallerde, kötüye kullanmayı tespit için tek eşikli yaklaşım yeterli olmalıdır. İzole ve halka açık olmayan anonim ortaklıklarda azınlık pay sahiplerinin etkin bir şekilde korunması için uygulanabilecek yöntemler bakımından ise, sınır aşan tür değiştirme, birleşme ve bölünmeler yönünden 2017/1132 sayılı Yönerge seviyesinde de öngörülen azınlığa ortaklıktan çıkma hakkı tanıyan bir düzenlemenin getirilmesi yerinde olacaktır. Haklı nedenle feshi düzenleyen TTK m.531’in değiştirilmesi suretiyle azınlık pay sahiplerine, paylarını satarak ortaklıktan çıkmayı doğrudan mahkemeden talep edebilecekleri bir düzenleme getirilmesi de düşünülmelidir. EMCA Bölüm 11.35 ve Bölüm 11.37’deki pay sahiplerinin paylarını satarak ortaklıktan çıkması ile payların satın alınmasını talep etme veya paylarını satmaya zorlama hususlarında öngörülen hükümlerden TTK için de esinlenilebilir.
Abd’nin Levant Hengamesinde Süreklenen Politikaları
(Uluslararasi Iliskiler Konseyi Dernegi, 2018) Görmüş, Evrim; Özel, Soli
Levant bölgesi, İkinci Dünya Savaşı’ndan bu yana ABD dış politikasının öncelikli çıkar alanlarından birini oluşturmaktadır. Bu makalenin amacı, ABD’nin, bilhassa da son iki Amerikan yönetiminin, Levant’a yönelik politikalarını açıklığa kavuşturmayı, bölgede ve Amerikan siyasetindeki değişimlerin Washington’un Levant’a yönelik politikasının nasıl yanlı, zaman zaman beceriksiz ve daha da önemlisi tutarsız görünmesine neden olduğunu anlamayı hedeflemektedir. Makale, bir yönetimden diğerine İsrail’in egemenliğinin korunması, dostane rejimlerin desteklenmesi, terörizmle mücadele ve İran’ın kontrol altına alınması gibi konularda ve genel itibariyle bölgeye yönelik yaklaşımdaki değişiklikleri incelemektedir. Suriye’ye yönelik politikadaki tereddütler ve değişimler daha detaylı ele alınmıştır. Nitekim bu konular Amerika’nın Levant’a yönelik politikasının henüz son halini almadığının, daha da ötesinde gelişmeler karşısında ABD’nin nasıl yön değiştirdiğini ve Esad’ı yerinden etme hedefinden uzaklaşarak İran’ı kontrol altına alma ve eğer mümkünse boyun eğdirmeye odaklandığına işaret etmektedir.
Citation - WoS: 4
Citation - Scopus: 8
Accurate Indoor Positioning With Ultra-Wide Band Sensors
(Tubitak, 2020) Arsan, Taner
Ultra-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.
An Alternative Approach To Design Lumped Element Delay Equalizers
(Istanbul Univ, FAC Engineering, 2015) Şengül, Metin
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 secondorder all-pass circuits. An example is given to illustrate the utilization of the proposed algorithm
Citation - Scopus: 1
An 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.
Citation - Scopus: 10
An Analysis of International Relations Academics in Turkey and Their Approaches To the Field: Trip 2014 Faculty Survey Results;
(International Relations Council of Turkey, 2016) Aydin,M.; Hisarlioğlu,F.; Yazgan,K.
Despite the increasing interest in the studies inquiring the limits, autonomous character of and the interactions between the International Relations (IR) discipline and other academic fields, the scope and scale of empirical research on these issues are relatively small. In order to contribute to the discussion on the limits and peculiarities of the IR discipline and to shed light on the development, current status and major characteristics of the IR studies in Turkey, its place in the global IR discipline and the views of IR scholars on major issues on the global, regional and national agenda, two surveys were conducted by the International Relations Council of Turkey (IRCT) in 2007 and 2009. Later on, the IRTC collaborated with the Institute for the Theory and Practice of International Relations at the College of William and Mary to conduct further surveys in 2011 and 2014. This paper presents findings of the last survey on Turkey, based on the worldwide research simultaneously conducted in 31 different countries in September 2014. © 2016, International Relations Council of Turkey. All rights reserved.
Citation - WoS: 1
An Analysis of Social Media Content Shared by Right-Wing Extremist Groups in the United States, the Great Britain and Australia
(Kadir Has Üniversitesi, 2020) Masalha, Oday; Baş, Özen; Baş, Özen
Literature on extremism online is mostly focused on the activities of jihadist and extremist groups such as al-Qaeda and ISIS. There is also research related to extreme right activities on social media, however their focus is on the analysis of shared memes and examination of populism on the Internet. With the New Zealand attack, the El Paso incident, and Britain's exit from the European Union, extreme right movements have emerged strongly on the Internet, especially on Facebook and Twitter. This thesis attempts to understand how extreme right groups are using Facebook and Twitter platforms to advance their extremist ideologies. In order to do so, a qualitative content analysis of posts shared by public Facebook groups and Twitter accounts of extreme right groups in Britain, the United States and Australia has been conducted. The social media posts shared by extreme right groups in the US, Australia and the Great Britain on Facebook and Twitter between the dates of March 15, 2019 to February 5, 2020 were coded according to a coding instrument. The coding instrument consisted of categories and subcategories which were derived from existing studies in the field and examined the prevalence of the extremist ideologies present in the social media posts shared by these groups and accounts. Findings suggest that the most prevalent extremist ideologies present in the posts shared by extremist groups on Facebook and Twitter were anti-elitist populist and protection of western values. Also, extremist groups rely heavily on texts and photo combined to publish their ideologies, with the aim of reaching a wide audience through the getting high number of likes and comments.
Citation - WoS: 1
An analysis of social media content shared by right-wing extremist groups in the United States, the Great Britain and Australia
(Istanbul Univ, Fac Communication, 2023) Masalha, Oday; Bas, Ozen
The extreme right movements have increasingly appeared on social media, especially on Twitter and Facebook, coinciding with the 2019 New Zealand attack, the 2019 El Paso incident, and Britain's exit from the European Union in 2020. This study examines the content and the form of extreme right-wing activities on Facebook and Twitter to promote their ideologies. A qualitative content analysis was conducted on posts shared by extreme-right groups on public Facebook and Twitter accounts in Great Britain, the United States and Australia. The sample spans from March 15, 2019 to February 5, 2020. The posts were coded according to a coding instrument developed based on the existing literature spreading extremist ideologies on social media. The coding instrument consisted of categories and subcategories such as 'the protection of western values', 'anti-LGBT activism', 'anti-feminism', 'anti-Islam', 'anti-immigrant sentiments', 'fostering the white race', and 'anti-elitist populism'. Findings suggest that the most prevalent extremist ideologies on Facebook and Twitter posts were 'anti-elitist populism' and 'the protection of western values'. Also, extremist groups heavily shared posts that combined texts and images to spread their ideologies on social media.
Analysis of the Theater Boxes in the Housing Designs of Loos in Terms of Visual Interaction Abstract
(Anadolu Univ, 2022) Acırlı, Zeynep
Adolf Loos, one of the pioneers of modern architecture, has been the subject of many discussions within the scope of visual interaction thanks to the theater boxes used in the spatial setup of the residences he designed. Accordingly, it is important to reveal the see-and-be seen relation that Loos created in space with the fiction of the theatre boxes, which leads the scope of the study to be covered by the Houses of Moller, Josephine Baker and Muller, as key examples of Loos' theatre boxes fiction. In line with this purpose, the see-and-be seen relation of selected residential buildings was examined using visibility graph analysis and peer field of view analysis, which are methods of space sequencing. Since the peer field of view analyses are performed with the users' perspectives, the study focused on understanding perceptions and movements of users in space. Correspondingly, visual interaction data of selected locations was obtained through the analysis method used. With the acquired data, interaction of seeing and being seen and its patterns are determined as the focal point of the study.
Citation - WoS: 2
Citation - Scopus: 3
Aryl Butenoic Acid Derivatives as a New Class of Histone Deacetylase Inhibitors: Synthesis in Vitro Evaluation and Molecular Docking Studies
(Scientific Technical Research Council Turkey-Tubitak, 2014) Esiyok, Peruze Ayhan; Seven, özlem; Eymur, Guluzar; Tatar, Gamze Bora; Erden, Didem Dayangaç; Yelekçi, Kemal; Yurter, Hayat; Demir, Ayhan S.; Ayhan, Peruze Eşıyok
New aryl butenoic acid derivatives have been synthesized by combining hydroxy- or methoxy-substituted phenyl rings as the capping group with a double bond in the short linker as well as metal binding groups enoic ester and salts bearing either methyl or morpholine. These compounds have been shown to possess promising histone deacetylase inhibition activities via in vitro fluorometric assay and molecular docking studies.
Citation - WoS: 1
Citation - Scopus: 1
Assesment of soft error sensitivity of power flow analysis
(Gazi Univ, Fac Engineering Architecture, 2023) Yetkin, Emrullah Fatih
Today'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.
Citation - WoS: 2
Asymmetric Cost Behavior and Acquirer Returns: Evidence From U.s. Mergers
(Ege Univ, 2019) Uğurlu, Mine; Öztürk Danışman, Gamze; Bilyay-Erdoğan, Seda; Vural-Yavaş, Çiğdem; Danisman, Gamze Ozturk; Yavaş, Çiğdem Vural; Erdogan, Seda Bilyay
This paper investigates the asymmetric behavior of the selling, general and administrative (SG&A) costs of acquirers, and reveals its effects on mergers & acquisitions (M&A) performance in a one-year event window. It is based on a sample of 6888 M&As completed in the U.S. during the 2003-2015 period and employs panel data regressions. The results show that 73% of the acquirers display asymmetric cost behavior. A significant negative relation is found between cost stickiness and acquirers' abnormal returns following the merger announcement. Competition in the market for corporate control is positively related with acquirer returns but exacerbates the negative effects of cost-stickiness on abnormal returns of acquirers. The acquirers' risk of default is significantly negatively related to the abnormal returns they generate. This adverse effect of default risk on returns is stronger for acquirers with anti-sticky costs. Acquirer risk offsets the positive effects of competition on returns. Acquirers with sticky costs have lower abnormal returns than those with anti-sticky costs in a one-year window. The present study contributes to the literature by revealing the asymmetric cost behavior of acquirers involved in merger activity during the last decade, and provides evidence for an alternative explanation for the lower abnormal returns of the acquiring firms.
Citation - WoS: 2
Attentional Control Scale-Turkish Version: Psychometric Qualities, Factor Structure and Its Comparison with Behavioral Measures of Executive Attention
(ODTU-AYNA Klinik Psikoloji Destek Unitesi, 2024) Altan-Atalay, Ayse; Cinli, Dilem; Aksungur, Sebla Umay; Turkakin, Esin; Aksungur, Umay
Attentional control refers to the capacity to voluntarily control attentional resources in a flexible manner. Attentional control was reported to play a fundamental role in self-regulation, emotion regulation, delay of gratification, and psychological distress. The Attentional Control Scale (ACS) was developed to measure perceived attentional control based on shifting and focusing dimensions. The present studies aimed to adapt the Turkish version of ACS and asses its psychometric characteristics. Study 1 aimed to explore the psychometric qualities of the Turkish version with a group of Turkish individuals (N = 428, 306 women) between the ages of 18 and 68 and supported the two-factor model of ACS consisting of 17 items in total. The results supported that shifting, focusing, and total ACS showed adequate internal consistency, test-retest reliability, and convergent validity evidence based on its significant correlations with measures of anxiety, depression, and repetitive negative thinking, signifying its proper psychometric characteristics. In Study 2 (N = 97, 65 women), the association of ACS with behavioral attentional control measures was examined, and non-significant associations between self-report and behavioral measures of attentional control were denoted. These findings signified that rather than indicating the individual's actual attentional control capacity, ACS assessed how the individual perceives their own attention control capacities. Taken together, the results suggest that the Turkish form of ACS is a valid and reliable scale that can be used to assess perceived attentional control capacity based on shifting and focusing domains, particularly in the research setting.
Citation - WoS: 4
Batı Anadolu Grabenlerinin Gelişim Süreci İçinde Selçuk Grabeni’nin Morfotektonik Evrimi
(TMMOB Jeoloji Muhendisleri Odasi, 2023) Yılmaz, Yücel; Gürer, Ömer Feyzi; Erbay, Yücel; Erbay, Ayşe Yücel
Küçük Menderes Grabeni’nin batı ucunda yer alan ancak ondan sol yönlü doğrultu atımlı faylarla kesilip güneybatıya atılmış olan grabene bu çalışmada Selçuk Grabeni adı verilmiştir. Çünkü bu graben ana grabenden ileri evrelerde önemli farklılıklar geçirmiştir. Grabeni sınırlayan horstlarda metamorfik temel kayaları mostra vermektedir. Dolgusu ise Küçük Menderes Nehri’nin alüvyonundan oluşmaktadır. Selçuk Grabeni asimetrik bir grabendir. Güney kanat morfolojik nitelikleriyle belirgin ve aktif kenardır. Normal faylar bu kanatta birkaç fay basamağı halindedir. Kuzey kanat, aktif kenarı oluşturan kürek biçimli ana fayın tavan blokunda gelişmiş, antitetik faylar olarak yorumlanabilir. Grabeni az çok uzanımına verev birçok doğrultu atımlı fay kesmiştir. Genç yapısal ögeler graben ve yakın çevrenin morfolojisindeki izleriyle tanınmaktadır. Batı Anadolu’nun morfotektonik gelişim süreci içinde Selçuk Grabeni en geç gelişen grabenlerdendir. Küçük Menderes Grabeni, üzerinde yer aldığı horstun, Kuvaterner’de önce yükselip daha sonra çökmesi döneminde açılmıştır. Bu dönemde Selçuk Grabeni ana grabenin batıdaki uzanımında yer almıştır. Daha sonra özellikle sahil bölgelerinin morfotektoniğini büyük ölçüde değiştiren KKB doğrultulu sol yönlü doğrultu atımlı faylar ve bunlarla eşzamanlı fay çiftlerinin gelişmesiyle Küçük Menderes Grabeni’nden ayrılarak güneybatı yönünde ötelenmiş ve Küçük Menderes’le olan doğrudan bağlantısı kopmuştur. Geç Kuvaterner’de gelişmiş olan bu evreden sonra gelişimini bağımsız bir graben olarak sürdürmektedir.
Citation - WoS: 1
Citation - Scopus: 1
Bayesian Estimation of Discrete-Time Cellular Neural Network Coefficients
(TUBITAK Scientific & Technical Research Council Turkey, 2017) Özer, Hakan Metin; Özmen, Atilla; Şenol, Habib; Metin Özer, Hakan
A 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.
Citation - WoS: 1
Citation - Scopus: 4
Broadband Impedance Matching Via Lossless Unsymmetrical Lattice Networks
(Elsevier GMBH Urban & Fischer Verlag, 2012) Şengül, Metin Y.
In this paper a broadband impedance matching network (equalizer) design algorithm has been proposed. In the equalizer a lossless unsymmetrical lattice network has been utilized. The branch impedances of the lattice network are considered as singly terminated lossless LC networks since it is not desired to dissipate power in the equalizer. After giving the algorithm its usage has been illustrated via an example. (C) 2011 Elsevier GmbH. All rights reserved.
Broadband Matching Via Reflection Coefficient Modeling
(AVES YAYINCILIK, 2016) Şengül, Metin Y.
[Abstract Not Available]

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