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Citation - WoS: 21
Citation - Scopus: 27
Vacillation in Turkey's Popular Global Tv Exports: Toward a More Complex Understanding of Distribution
(USC Annenberg Press, 2016) Alankuş, Sevda; Yanardağoğlu, Eylem
Audience demand for Turkey's TV series has increased their strength in the regional market and beyond. By mid-2014 more than 70 Turkish TV dramas reached audiences in 75 countries. Some experts have characterized this as neo-Ottoman cool, referring to Turkey's growing "soft power" role in successfully combining Islam with democracy. However, survey data from 16 Arab countries, previous audience studies, and our in-depth interviews with Istanbul-based producers and distributors refute this. Neo-Ottoman cool does not register the full dynamics of contingent relations between economy, politics, ideology, and media flows. Our research underscores the region's glocal flexibility and the market articulations overarching Turkey's soft power ambitions, how the drama genre attracts women cross-culturally, and the limits of notions of cultural proximity.
Citation - WoS: 1
Citation - Scopus: 1
The Role of Pyranine in Characterization of Paam-Kappa C Composites by Using Fluorescence Technique
(Springer/Plenum Publishers, 2011) Evingür, Gülşen Akın; Pekcan, Önder
Polyacrylamide (PAAm) doped by kappa-carrageenan (kappa C) gels were prepared with various amounts of kappa C varying in the range between 0 wt.% and 3 wt.%. Steady-state fluorescence (SSF) technique was employed for studying sol-gel transition and swelling of PAAm-kappa C composite gels which were prepared by free-radical crosslinking copolymerization. Pyranine was introduced as a fluorescence probe. Pyranine molecules start to bind to acrylamide polymer chains upon the initiation of the polymerization thus the spectra of the bonded pyranines shift to the shorter wavelengths. Fluorescence spectra from the bonded pyranines allow one to monitor the sol-gel transition and to test the universality of the sol-gel transition as a function of some kinetic parameters like polymer concentration. Observations around the gel point t (c) for PAAm-kappa C composite gels showed that the gel fraction exponent beta obeyed the percolation result for low kappa C (< 2.0 wt. %) however classical results were produced at higher kappa C (> 2.0 wt.%). On the other hand fluorescence intensity of pyranine was measured during in situ swelling process at various amounts of kappa C and it was observed that fluorescence intensity values decreased as swelling is proceeded. Li-Tanaka equation was used to determine the swelling time constants tau and cooperative diffusion coefficients D.
Citation - WoS: 25
Citation - Scopus: 28
Low-Complexity Map-Based Successive Data Detection for Coded Ofdm Systems Over Highly Mobile Wireless Channels
(IEEE-INST Electrical Electronics Engineers Inc, 2011) Panayırcı, Erdal; Dogan, Hakan; Poor, H. Vincent
This paper is concerned with the challenging and timely problem of data detection for coded orthogonal frequency-division multiplexing (OFDM) systems in the presence of frequency-selective and very rapidly time varying channels. New low-complexity maximum a posteriori probability (MAP) data detection algorithms are proposed based on sequential detection with optimal ordering (SDOO) and sequential detection with successive cancellation (SDSC). The received signal vector is optimally decomposed into reduced dimensional subobservations by exploiting the banded structure of the frequency-domain channel matrix whose bandwidth is a parameter to be adjusted according to the speed of the mobile terminal. The data symbols are then detected by the proposed algorithms in a computationally efficient way by means of the Markov chain Monte Carlo (MCMC) technique with Gibbs sampling. The impact of the imperfect channel state information (CSI) on the bit error rate (BER) performance of these algorithms is investigated analytically and by computer simulations. A detailed computational complexity investigation and simulation results indicate that particularly the algorithm based on SDSC has significant performance and complexity advantages and is very robust against channel estimation errors compared with existing suboptimal detection and equalization algorithms proposed earlier in the literature.
The Relationship Between Firm Size and Export Sales: Sector or Size What Matters?
(Physica-Verlag, 2017) Berk, Niyazi; Öztürkkal, Belma
This paper examines the performance of export focused companies listed on the Borsa Istanbul trading in the emerging market of Turkey. Using the panel data of stock market prices (1995–2011) we study the performance of companies in different sectors and their return performance in the volatile exchange rate environment and devaluation periods of 1996 1997 1998 1999 2001 and 2008. The paper investigates sales market capitalization or asset performances’ statistical significance level with regard to these companies’ export level. We review the performance of these operational measures in an environment of changing foreign exchange rates. Regression analysis is used to measure the effects of currency devaluation on the companies analyzed. Finally the study analyzes the export sales of companies by sector following a period of sharp devaluation. © Springer International Publishing AG 2017.
Citation - WoS: 3
Energy Security in South East Europe
(Palgrave, 2013) Cehulic, Lidija; Kuznetsov, Alexey V.; Çelikpala, Mitat; Gleason, Gregory
[Abstract Not Available]
On the Selection of Interpolation Points for Rational Krylov Methods
(Springer-Verlag Berlin, 2012) Yetkin, E. Fatih; Dağ, Hasan
We suggest a simple and an efficient way of selecting a suitable set of interpolation points for the well-known rational Krylov based model order reduction techniques. To do this some sampling points from the frequency response of the transfer function are taken. These points correspond to the places where the sign of the numerical derivation of transfer function changes. The suggested method requires a set of linear system's solutions several times. But they can be computed concurrently by different processors in a parallel computing environment. Serial performance of the method is compared to the well-known H-2 optimal method for several benchmark examples. The method achieves acceptable accuracies (the same order of magnitude) compared to that of H-2 optimal methods and has a better performance than the common selection procedures such as linearly distributed points.
Citation - WoS: 19
Citation - Scopus: 17
Efficiency Analysis of Black Sea Container Seaports: Application of an Integrated Mcdm Approach
(Routledge, 2020) Ömer Faruk, Görçün
The current paper carries out an examination about the selection of the proper container seaport, which in the Black sea region. This paper focuses on a research question. Is it possible to apply multi-criteria decision-making methods that can be applied more easily than the DEA technique for decision-makers? In order to determine the best performance analysis technique that can give successful results, two-hybrid multi-criteria decision-making models were selected and operational performances of the container ports in the Black Sea region were analyzed with the help of these integrated approaches. While the first MCDM model consists of the entropy and OCRA technique, the second hybrid model consists of the Entropy and EATWIOS method. The main aim of this paper is to discuss whether these proposed hybrid models can be implemented to make an effective performance analysis for the maritime industry. The second aim of this paper is to evaluate the Black sea container seaports with the help of this suggested model. The study reveals that the proposed MCDM models can be implemented for container port selection successfully and easily and both of them have given very closer results to each other in aspects of the evaluation of the criteria and options.
Citation - WoS: 2
Traditional Folklore Forms in Temasa-I Dunya Ve Cefakar U Cefakes
(Milli Folklor Dergisi, 2016) Şişmanoğlu Şimşek, Şehnaz
Temasa-i Dunya ve Cefakar u Cefakes written by Evangelinos Misailidis in 1871-1872 has widely been considered to be an adaptation of the Greek novel O Polipathis (1839) and its originality has not been adequately emphasized in past studies. This article suggests that Temasa-i Dunya should be considered an original novel since it incorporates traditional folklore forms peculiar to Ottoman literature which are absent in Polipathis. This study first of all describes the variety and the origins of the traditional folklore forms in Temasa-i Dunya and delineates the literary tools by the help of which they were included in the text. Furthermore it analyzes how these elements affect the narrative discourse and the author's purposes in employing them. The analysis demonstrates that in Temasa-i Dunya oral and print culture materials of both Muslim and non-Muslim origins are embedded in the text primarily in the form of narrative digressions and digressions from the frame story. These digressions carry the marks of the traditional story teller both in terms of functionality and at the discursive level. In other words Misailidis' narrator being an active subject similar to the story teller in the oral culture chooses and manipulates the appropriate traditional story in accordance with the messages he conveys to the Karamanli readership. It can also be said that unrealistic features of traditional stories are eliminated and the stories are presented in a realistic style and content. Moreover the aforementioned narratives help to overcome the limited perspective of the first person narrative and to portray a variety of experiences. Temasa-i Dunya also presents a folkloric panorama of 19th century Istanbul through numerous idioms and proverbs.
Citation - WoS: 1
Citation - Scopus: 2
The Maximum Surplus in a Finite-Time Interval for a Discrete-Time Risk Model With Exchangeable Dependent Claim Occurrences
(John Wiley and Sons Ltd, 2019) Gebizlioğlu, Ömer Lütfi; Eryilmaz, Serkan
This paper investigates a discrete-time risk model that involves exchangeable dependent loss generating claim occurrences and compound binomially distributed aggregate loss amounts. First a general framework is presented to derive the distribution of a surplus sequence using the model. This framework is then applied to obtain the distribution of any function of a surplus sequence in a finite-time interval. Specifically the distribution of the maximum surplus is obtained under nonruin conditions. Based on this distribution the computation of the minimum surplus distribution is given. Asset and risk management–oriented implications are discussed for the obtained distributions based on numerical evaluations. In addition comparisons are made involving the corresponding results of the classical discrete-time compound binomial risk model for which claim occurrences are independent and identically distributed. © 2018 John Wiley & Sons Ltd.
Citation - Scopus: 11
Turkey's Dilemmas
(2011) Özel, Soli; Özcan, Gencer
Turkey’s ruling Justice and Development Party (AKP), which prides itself on serving as a regional model of democratic governance, often pays lip service to human rights and democratic principles in its foreign policy. Yet when dealing with politically less than attractive regional partners, the AKP will frequently maintain public silence rather than risk harm to Turkish interests, particularly economic ones. Will the more robust human-rights policy that Turkey has begun to apply in the Middle East be extended to Ankara’s dealings with other parts of the world? This remains unclear, yet it seems obvious that the principles which the present AKP government has laid down as markers for future foreign-policy activities will tend to make it increasingly costly for Turkey to turn a blind eye to human-rights abuses abroad.
Paul Bowles as I Knew Him
(Brill Academic Publishers, 2014) Sawyer-Lauçanno, Christopher
[Abstract Not Available]
Citation - WoS: 5
Citation - Scopus: 6
Determinants of Corporate Cash Holdings: Firm Level Evidence From Emerging Markets
(Springer, 2017) Akben Selçuk, Elif; Altiok-Yilmaz, Ayse
The objective of this chapter is to investigate the factors affecting corporate cash holdings in five emerging markets namely Brazil Indonesia Mexico Russia and Turkey. The sample consists of 1991 firms listed on the major stock exchange of their countries and covers the period between 2009 and 2015. The model is estimated by Arellano–Bond dynamic generalized method of moments. Results show that firms which use higher leverage in their capital structure hold more cash. More profitable firms are shown to have higher levels of cash holdings. Another variable which has a positive effect on the level of cash holdings in any given period is the level of cash holdings in the previous period as shown by the positive and significant coefficient of the lagged dependent variable in the model. Liquidity and firm size have a negative and statistically significant impact on the level of corporate cash holdings. Firms with higher level of capital expenditures are also shown to hold less cash. Finally growth opportunities do not have a significant impact on the level of cash holdings for the firms in the emerging markets analyzed. © Springer International Publishing AG 2017.
Citation - WoS: 7
Citation - Scopus: 11
Turkish Efforts in Peacekeeping and the Introduction of the Tubakov Dataset: an Exploratory Analysis
(Routledge Journals Taylor & Francis Ltd, 2018) Yalçınkaya, Haldun; Hatipoğlu, Emre; Acar, Dilaver Arikan; Çelikpala, Mitat
This study introduces the TUBAKOV dataset which offers extensive data on 57 peacekeeping operations (PKOs) that Turkey has contributed to between the years 1988-2015. TUBAKOV improves existing data in several ways. First it draws data from governmental resources that have not been previously used. Second Turkey's contributions for each PKO are presented both at the levels of PKO and PKO-contribution year format. The website of the dataset also allows access to qualitative data such as primary text sources hence facilitating qualitative and multi-method research on peacekeeping. Preliminary analyses indicate that the frequency nature and the geographic focus of Turkey's contributions to peacekeeping operations demonstrate a significant shift with the new millennium. Preliminary findings offer interesting insights to the changing characteristics of Turkey's PKO involvements relating to the content geography and timing of these contributions over the time period covered by this dataset.
Citation - WoS: 36
Citation - Scopus: 46
Evaluation of Water Supply Alternatives for Istanbul Using Forecasting and Multi-Criteria Decision Making Methods
(Elsevier Ltd, 2020) Savun Hekimoğlu, Başak; Erbay, Barbaros; Hekimoğlu, Mustafa; Burak, Selmin
Water scarcity is one of the most serious problems of the future due to increasing urbanization and water demand. Urban water planners need to balance increasing water demand with water resources that are under increasing pressure due to climate change and water pollution. Decision makers are forced to select the most appropriate water management alternative with respect to multiple, conflicting criteria based on short and long term projections of water demand in the future. In this paper, we consider water management in Istanbul, a megacity with a population of 15 million. Purpose: The purpose of this paper is to develop a method combining demand forecasting with multi-criteria decision making (MCDM) methods to evaluate five different water supply alternatives with respect to seven criteria using opinions of experts and stakeholders from different sectors. Methodology: To combine forecasting with MCDM, we design a data collection method in which we share our demand forecasts with our experts. For demand forecasting, we compare Holt-Winters, Seasonal Autoregressive Integrated Moving Average (S-ARIMA), and feedforward Artificial Neural Network (ANN) models and select S-ARIMA as the best forecasting model for monthly water consumption data. Generated demand projections are shared with experts from different sectors and collected data is evaluated with Fuzzy Theory using two distinct MCDM models: Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) and Preference Ranking Organization Method for Enrichment Evaluations (PROMETHEE). Also our analyses are complemented with two sensitivity analyses. Findings: Our results indicate that greywater reuse is the best alternative to satisfy the growing water demand of the city whereas all experts find desalination and inter-basin water transfer as the least attractive solutions. In addition, we adopt the PROMETHEE GDSS procedure to obtain a GAIA plane indicating consensus among experts. Furthermore, we find that our results are moderately sensitive to the number of experts and they are insensitive to changes in experts’ evaluations. Novelty: To the best of our knowledge, our study is the first one incorporating water demand and supply management concepts into the evaluation of alternatives. From a methodological perspective, water demand projections have never been used in an MCDM study in the literature. Also, this paper contributes to the literature with a mathematical construction of consensus and Monte Carlo simulations for the sufficiency of experts consulted in a study.
Citation - WoS: 54
Citation - Scopus: 66
Synthesis Molecular Modeling in Vivo Study and Anticancer Activity of 124-Triazole Containing Hydrazide-Hydrazones Derived From (s)-Naproxen
(Wiley-VCH Verlag GmbH, 2019) Han, Muhammed İhsan; Bekçi, Hatice; Uba, Abdullahi İbrahim; Yıldırım, Yeliz; Karasulu, Ercüment; Cumaoğlu, Ahmet; Karasulu, Hatice Y.; Yelekçi, Kemal; Yılmaz, Ozguer; Küçükgüzel, Şükriye Güniz
A new series of 124-triazole containing hydrazide-hydrazones derived from (S)-naproxen (7a-m) was synthesized in this study. The structures of these compounds were characterized by spectral (Fourier-transform infrared spectroscopy H-1-nuclear magnetic resonance (NMR) C-13-NMR and high-resolution electron ionization mass spectrometry) methods. Furthermore molecular modeling of these compounds was studied on human methionine aminopeptidase-2. All synthesized compounds were screened for anticancer activity against three prostate cancer cell lines (PC3 DU-145 and LNCaP) using the 3-(45-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium colorimetric method. Compound 7a showed the best activity against the PC3 DU-145 and LNCaP cancer cell lines with IC50 values of 26.0 34.5 and 48.8 mu M respectively. Compounds 7b 7k and 7m showed anticancer activity against cancer cell lines PC3 and DU-145 with IC50 values of 43.0 36.5 29.3 mu M and 49.8 49.1 31.6 mu M respectively. Compounds 7f and 7g showed anticancer activity against PC3 cells with IC50 values of 43.4 and 34.5 mu M respectively. To assess the biodistribution in mice of IRDye800 dye-labeled compound 7a or 100 mu M of free dye was injected intravenously into the mice's tail. In vivo images were taken with in vivo imaging system spectrum device at 60 120 180 240 300 and 360 min after injection. At the end of 360 min ex vivo studies were carried out to determine in which organs the dye was accumulated in the urogenital system. Ex vivo studies showed that the accumulation of compound 7a in the prostate is greater than that of the free dye and it is concluded that compound 7a may be promising for the treatment of prostate cancer..
Citation - WoS: 11
Citation - Scopus: 13
Holocene Climate Forcings and Lacustrine Regime Shifts in the Indian Summer Monsoon Realm
(Wıley, 2020) Prasad, Sushma; Marwan, Norbert; Eroğlu, Deniz; Goswami, Bedartha; Mishra, Praveen Kuma; Gaye, Birgit; Anoop, Akhil; Stebich, Martina; Jehangir, Arshid; Basavaiah, Nathani
Extreme climate events have been identified both in meteorological and long-term proxy records from the Indian summer monsoon (ISM) realm. However, the potential of palaeoclimate data for understanding mechanisms triggering climate extremes over long time scales has not been fully exploited. A distinction between proxies indicating climate change, environment, and ecosystem shift is crucial for enabling a comparison with forcing mechanisms (e.g. El-Nino Southern Oscillation). In this study we decouple these factors using data analysis techniques [multiplex recurrence network (MRN) and principal component analyses (PCA)] on multiproxy data from two lakes located in different climate regions - Lonar Lake (ISM dominated) and the high-altitude Tso Moriri Lake (ISM and westerlies influenced). Our results indicate that (i) MRN analysis, an indicator of changing environmental conditions, is associated with droughts in regions with a single climate driver but provides ambiguous results in regions with multiple climate/environmental drivers; (ii) the lacustrine ecosystem was 'less sensitive' to forcings during the early Holocene wetter periods; (iii) archives in climate zones with a single climate driver were most sensitive to regime shifts; (iv) data analyses are successful in identifying the timing of onset of climate change, and distinguishing between extrinsic and intrinsic (lacustrine) regime shifts by comparison with forcing mechanisms. Our results enable development of conceptual models to explain links between forcings and regional climate change that can be tested in climate models to provide an improved understanding of the ISM dynamics and their impact on ecosystems. (c) 2020 John Wiley & Sons, Ltd.
London 2012 Olympic and Paralympic Games-Acoustic Design Aspects of Temporary Venues
(European Acoustics Association EAA, 2014) Şaher, Konca; Cahill, Ben
This paper concentrates on the acoustic design aspects of the Temporary Venues at London 2012 Olympic and Paralympic Games. The project needed integration of individuals from various different client groups consultants and contractors into one team to work in a multi-disciplinary way. Atkins-Acoustics Noise and Vibration Consultancy worked with venue design team project managers sustainability consultants from London Organizing Committee of the Olympic and Paralympic Games (LOCOG) and architects. The keywords for Temporary Venues are absence of legacy and sustainability. There are over 120 of Temporary Venues spread throughout London and other parts of UK. The acoustic analysis strategy had two main components: Noise to the environment and noise to the venue. Noise to the environment included baseline noise survey of the site in comparison to the 3D modelling of the venue for construction games and demolition phases. Noise to the venue included setting acoustic criteria for each component sound insulation reverberation time calculations public address and voice evacuation design and mechanical plant noise control.
Joint Data Detection and Channel Estimation for Uplink Mc-Cdma Systems Over Frequency Selective Channels
(Springer, 2007) Panayırcı, Erdal; Doğan, Hakan; Çırpan, Hakan Ali; Fleury, Bernard Henri
This paper is concerned with joint channel estimation and data detection for uplink multicarrier code-division multiple-access (MC-CDMA) systems ill the presence of frequency fading channel. The detection and estimation implemented at the receiver are based on a version of the expectation maximization (EM) algorithm which is very suitable for the the multicarrier signal formats. Application of the EM-based algorithm to the problem of iterative data detection and channel estimation leads to a receiver structure that also incorporates a partial interference cancelation. Computer simulations show that the proposed algorithm has excellent BER end estimation performance.
Citation - WoS: 3
Citation - Scopus: 4
Gelation of Paam-Pvp Composites: a Fluorescence Study
(World Scientific, 2014) Evingür, Gülşen Akin; Kaygusuz, Hakan; Erim, F. Bedia; Pekcan, Önder
Hybrid hydrogels are a new class of composite materials. Polyacrylamide (PAAm) hydrogels are mainly produced by free radical crosslinking copolymerization (FCC) of AAm in the presence of N N'-methylene bis (acrylamide) (BIS) as the crosslinker. Pyranine doped PAAm-poly (N-vinyl pyrrolidone) (PVP) composite were prepared with different amounts of PVP varying in the range between 0.0015 and 0.1 gr. It was observed that pyranine molecules as a fluoroprobe bind to AAm and PVP chains upon the initiation of the polymerization causing the fluorescence spectra of the bonded pyranines shift to the shorter wavelengths. The sol-gel phase transition and its universality were monitored and tested as a function of PVP contents. Observations around the critical point show that the gel fraction exponent beta agreed with the percolation result for below 0.025 gr PVP contents. However classical result was observed above 0.0125 gr PVP content.
BİRLEŞME VE SATIN ALMA İŞLEMLERİNİN ŞİRKET VE SEKTÖR DÜZEYİNDE ETKİLERİ
(2016) Akben Selçuk, Elif; Köksal, Emin; Altıok Yılmaz, Ayşe Dilara
[Abstract Not Available]

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