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Yayın Sustainability via extended warranty contracts: design for a consumer electronics retailer(MDPI, 2024-01) Aksezer, Sezgin ÇağlarWarranty is one of the most important attributes of any product, from both manufacturer and consumer points of view. Although the retailers connect manufacturers to customers by selling goods, traditionally, they have isolated themselves from warranty-related matters such as customer complaints and maintenance costs. However, recent trends in consumer behavior toward extended warranty contracts have changed this approach. While retailers have started to generate considerable revenue from the sale of these contracts, sustainability is also achieved by longer product life cycles. This study analyzed the failure behavior of different classes of cell phone products and their related costs through a chain of consumer electronics retailer operating in Türkiye. To compete on pricing and customer service, a novel policy was designed for the retailer to honor the contracts in house rather than underwriting to a third party insurer as the industry standard. The maintenance records of 328 previous failures were analyzed to plot a failure model. Failure mode and effects analysis was carried out to identify failure classes and the respective costs for extended warranty design for cell phones. The expected warranty costs for coverage of the third, fourth, and fifth years of operation were determined. The results show that the retailer may achieve the same level of profit by increasing customer satisfaction along with the sustainability of the product through repair actions.Yayın Space, time, and iconicity in Turkish sign language (TID)(Estonian Academy Publishers, 2012) Arik, EnginMuch evidence points to the conclusion that temporal concepts are drawn primarily from the conceptualization of space. Sign languages provide a particularly suitable area for observing such a relationship since they employ a three-dimensional signing space as a major building block for articulation. This paper addresses spatial and temporal language in Turkish Sign Language (TID), which has a full-fledged grammar and a natural language used by the deaf community in Turkey. It investigates descriptions of static and dynamic spatial situations and expressions of time. Results showed mismatches between the axial information in the stimuli and the use of left-right and front-back axes in the signing space. Furthermore, results also showed that the temporal language did not always correlate with the deictic use of the front-back axis. Thus, these findings suggest that temporal language may only partially be derived from spatial language.Yayın Landscape ecological evaluation of cultural patterns for the Istanbul urban landscape(MDPI, 2022-12) Aksu, Gül Aslı; Tağıl, Şermin; Musaoğlu, Nebiye; Seyek Canatanoğlu, Emel; Uzun, AdnanWith the widespread population growth in cities, anthropogenic influences inevitably lead to natural disturbances. The metropolitan area of Istanbul, with its rapid urbanization rate, has faced intense pressure regarding the sustainability of urban habitats. In this context, landscapes comprising patches affected by various disturbances and undergoing temporal changes must be analyzed, in order to assess city-related disturbances. In this study, the main objective was to understand how urbanization changed the function of the spatial distribution of the urban mosaic and, more specifically, its relationship with the size, shape, and connection among land-use classes. For this purpose, we took Besiktas, a district of Istanbul, as the study area. We evaluated the landscape pattern of the urban environment in two stages. First, we used medium-resolution satellite imagery to reveal the general interactions in the urbanization process. Landscape- and class-level landscape metrics were selected to quantify the landscape connectivity, and the distances between classes (green areas and artificial surfaces), patterns, and processes, using five satellite images representing a time span of 51 years (1963, 1984, 1997, 2005, and 2014). The general landscape structure was examined by looking at the temporal–spatial processes of artificial surface and green areas obtained from these medium-resolution satellite images. The trends in selected landscape-level metrics were specified and discussed through the use of a moving window analysis. We then used Pleiades high-resolution satellite imagery (2015) to analyze the landscape structure in more detail. This high-resolution base image allows us to recognize the possibility of classifying basic cultural landscape classes. The findings regarding the spatial arrangement of each class in the areas allocated to 14 cultural landscape classes were interpreted by associating them with the landscape functions. Finally, particulate matter (PM10) concentration data were collected and evaluated as an ecological indicator, in order to reveal the relationships between landscape structure and landscape function. In short, we first evaluated the whole landscape structure using medium-resolution data, followed by the classification of cultural landscapes using high-resolution satellite imagery, providing a time-effective—and, therefore, essential—auxiliary method for landscape evaluation. This two-stage evaluation method enables inferences to be made that can shed light on the landscape functions in an urban environment based on the landscape structure.Yayın Türkiye’nin Kürt sorunu: Arap Baharı ile değişen yurtiçi ve bölgesel dinamikler(Uluslararası İlişkiler Konseyi Derneği, 2014-06) Kayhan Pusane, ÖzlemTürkiye’nin PKK ile mücadelesi ve daha genel olarak Kürt sorunu, 1980’lerden itibaren uluslararası gelişmelerden etkilenen konular olmuştur. 2010’da Tunus’ta başlayan ve kısa zamanda çeşitli Kuzey Afrika ve Orta Doğu ülkelerine yayılan Arap Baharı da son yıllarda Kürdistan İşçi Partisi’nin (PKK) aldığı çeşitli kararları ve örgütün davranışlarını önemli ölçüde şekillendirmiştir. Bu çalışma, Arap Baharının PKK ve Kürt sorunu ile ilgili bölgesel ve Türkiye içi dinamikleri nasıl etkilediğini, PKK’nın karar alma süreçleri çerçevesinde incelemektedir. Makalede öncelikle Arap Baharı’nın Kürt sorununu kavramsal olarak nasıl etkilediği üzerinde durulmakta, daha sonra Suriye’de yaşanan iç çatışmaların, PKK’da ve daha genel olarak Kürt sorunu üzerinde neden olduğu değişiklikler tartışılmaktadır. Son olarak, Türkiye’de Kürt sorununun çözüm süreci ile ilgili hız kazanan gelişmeler, Arap Baharı çerçevesinde değerlendirilmektedir.Yayın Ontological insecurity, anxiety, and hubris: an affective account of Turkey-KRG relations(International Relations Council of Turkey, 2022-03-10) Kayhan Pusane, Özlem; Ilgıt, AslıGiven Iraqi Kurds’ special place in Turkey’s ‘biographical narrative’, Turkey-Iraqi Kurdish Regional Government (KRG) relations are not simply strategic or economic but also highly affectively charged. These relations involve emotional encounters filled with anxiety, pride, anger, and disappointment that generate concerns for not only Turkey’s physical security but also its ontological security. This paper traces the emotional context of Turkey-KRG relationship. It suggests that a combination of Turkey’s deep-rooted ‘anxiety’ and ‘hubris’ toward the Iraqi Kurds prevented the emergence of a close partnership between these two actors and fostered merely a ‘fragile rapprochement’ since 2008.Yayın On the online coalition structure generation problem(AI Access Foundationusc Information Sciences Inst, 2021) Flammini, Michele; Monaco, Gianpiero; Moscardelli, Luca; Shalom, Mordechai; Zaks, ShmuelWe consider the online version of the coalition structure generation problem, in which agents, corresponding to the vertices of a graph, appear in an online fashion and have to be partitioned into coalitions by an authority (i.e., an online algorithm). When an agent appears, the algorithm has to decide whether to put the agent into an existing coalition or to create a new one containing, at this moment, only her. The decision is irrevocable. The objective is partitioning agents into coalitions so as to maximize the resulting social welfare that is the sum of all coalition values. We consider two cases for the value of a coalition: (1) the sum of the weights of its edges, and (2) the sum of the weights of its edges divided by its size. Coalition structures appear in a variety of application in AI, multi-agent systems, networks, as well as in social networks, data analysis, computational biology, game theory, and scheduling. For each of the coalition value functions we consider the bounded and unbounded cases depending on whether or not the size of a coalition can exceed a given value alpha. Furthermore, we consider the case of a limited number of coalitions and various weight functions for the edges, i.e., unrestricted, positive and constant weights. We show tight or nearly tight bounds for the competitive ratio in each case.Yayın Impact of climate change on natural snow reliability, snowmaking capacities, and wind conditions of ski Resorts in Northeast Turkey: a dynamical downscaling approach(Mdpi Ag, 2016-04) Demiroğlu, Osman Cenk; Turp, Mustafa Tufan; Öztürk, Tuğba; Kurnaz, Mehmet LeventMany ski resorts worldwide are going through deteriorating snow cover conditions due to anthropogenic warming trends. As the natural and the artificially supported, i.e., technical, snow reliability of ski resorts diminish, the industry approaches a deadlock. For this reason, impact assessment studies have become vital for understanding vulnerability of ski tourism. This study considers three resorts at one of the rapidly emerging ski destinations, Northeast Turkey, for snow reliability analyses. Initially one global circulation model is dynamically downscaled by using the regional climate model RegCM4.4 for 1971-2000 and 2021-2050 periods along the RCP4.5 greenhouse gas concentration pathway. Next, the projected climate outputs are converted into indicators of natural snow reliability, snowmaking capacity, and wind conditions. The results show an overall decline in the frequencies of naturally snow reliable days and snowmaking capacities between the two periods. Despite the decrease, only the lower altitudes of one ski resort would face the risk of losing natural snow reliability and snowmaking could still compensate for forming the base layer before the critical New Year's week. On the other hand, adverse high wind conditions improve as to reduce the number of lift closure days at all resorts. Overall, this particular region seems to be relatively resilient against climate change.Yayın Anti-tobacco control industry strategies in Turkey(BioMed Central Ltd, 2018-02-26) Keklik, Seda; Gültekin Karakas, DeryaBackground: Transnational tobacco companies (TTCs) penetrated the Turkish cigarette market due to trade and investment liberalization in the post-1980 period and eventually secured full control. Despite tobacco control policies put in place in reaction to accelerating consumption, TTCs reinforced their market power through a variety of strategies. This paper explores industry strategies that counteract tobacco control policies in Turkey. Methods: The study employs both qualitative and quantitative analyses to explore industry strategies in Turkey. Besides the content analyses of industry and market reports, descriptive analyses were conducted for the sub-periods of 1999-2015. The analyses focus on the market strategies of product innovation, advertisement-promotion, cost management and pricing. Results: Rising sales of low tar, ultra-low tar, slim, super-slim and flavoured cigarettes indicate that product innovation served to sustain consumption. Besides, the tobacco industry, using its strong distribution channels, the Internet, and CSR projects, were found to have promoted smoking indirectly. The industry also rationalized manufacturing facilities and reduced the cost of tobacco, making Turkey a cigarette-manufacturing base. Tobacco manufacturers, moreover, offered cigarettes in different price segments and adjusted net prices both up and down according to price categories and market conditions. In response to the successful effect of shifts in price margins, the market share of mid-priced cigarettes expanded while those within the economy category maintained the highest market share. As a result of pricing strategies, net sales revenues increased. Aside from official cigarette sales, the upward trends in the registered and unregistered sales of cigarette substitutes indicate that the demand-side tobacco control efforts remain inadequate. Conclusions: The Turkish case reveals that the resilience of the tobacco industry vis-a-vis mainstream tobacco control efforts necessitates a new policy perspective. Rising market concentration by TTCs and the global nature of industry strategies require that the highly profitable manufacturing and trade of tobacco products should be discouraged on a basis of international collaboration. To reduce and eventually eradicate tobacco consumption, supply-side tobacco control measures are needed along with demand-side policies.Yayın Etnik ve ulusal kimlikler ile dış grup tutumları ilişkisinde çatışma algısı ve dış gruba sorumluluk yükleme(Turkish Psychological Association, 2017-12) Bağcı Hemşinlioğlu, Sabahat Çiğdem; Çelebi, ElifBu araştırmada etnik ve ulusal kimliklerle özdeşim ile dış grup tutumları arasındaki ilişki, algılanan çatışma düzeyi ve dış gruba sorumluluk yükleme değişkenlerinin aracı rolü incelenerek değerlendirilmiştir. Sosyal kimlik teorisi ışığında, etnik kimliklerin olumlu dış grup tutumlarıyla negatif yönde ilişkili olacağı ve bu ilişkinin artan çatışma algısı ve dış gruba sorumluluk yükleme seviyeleri ile açıklanacağı; ortak iç grup kimlik teorisi ışığında ise ulusal kimliklerin olumlu dış grup tutumlarıyla pozitif yönde ilişkili olacağı ve bu ilişkinin azalan çatışma algısı ve dış gruba sorumluluk yükleme seviyeleri ile açıklanacağı öne sürülmüştür. Veriler Türkiye'nin değişik illerindeki üniversite kampüslerinde toplanmış, toplamda 320 Türk ve 153 Kürt üniversite öğrencisi arasında sınanmıştır. Yol analizleri sonuçlarına göre, her iki kimlikle özdeşim dış grup tutumlarıyla önerilen yönlerde ilişkili iken, algılanan çatışma seviyesi ve dış grup sorumluluk yükleme seviyesi bu ilişkilerde kısmi aracılar olarak rol almıştır. Ayrıca, Türk ve Kürt gruplar arasında dış grup tutumları ve algılanan çatışma seviyeleri arasında anlamlı farklılıklar gözlenmiştir. Türklerle karşılaştırıldığında Kürtler daha yüksek çatışma algısı ve dış gruba sorumluluk yükleme seviyeleri belirtmiştir. Aynı şekilde, Kürtler Türklere göre dış gruba karşı daha negatif tutumlar sergilemiştir. Türkiye'deki Türk-Kürt etnik gruplar arasındaki ilişkiler sosyal kimlik ve ortak iç grup kimlik teorileri göz önüne alınarak tartışılmıştır.Yayın Economic impacts of increased U.S. exports of natural gas: An energy system perspective(MDPI AG, 2016-05-25) Sarıca, Kemal; Tyner, Wallace E.With the recent shale gas boom, the U.S. is expected to have very large natural gas resources. In this respect, the key question is would it be better to rely completely on free market resource allocations which would lead to large exports of natural gas or to limit natural gas exports so that more could be used in the U.S.. After accounting for the cost of liquefying the natural gas and shipping it to foreign markets, the current price difference leaves room for considerable profit to producers from exports. In addition, there is a large domestic demand for natural gas from various sectors such as electricity generation, industrial applications, and the transportation sector etc. A hybrid modeling approach has been carried out using our version of the well-known MARket ALlocation (MARKAL)-Macro model to keep bottom-up model richness with macro effects to incorporate price and gross domestic product (GDP) feedbacks. One of the conclusion of this study is that permitting higher natural gas export levels leads to a small reduction in GDP (0.04%-0.17%). Higher exports also increases U.S. greenhouse gas (GHG) emissions and electricity prices (1.1%-7.2%). We also evaluate the impacts of natural gas exports in the presence of a Clean Energy Standard (CES) for electricity. In this case, the GDP impacts are similar, but the electricity and transport sector impacts are different.
