Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - Scopus: 2The European Union and Turkey: a Review of Their Commonalities and Disparities Using Cluster Analysis(Vilnius Gediminas Technical University, 2014) Yıldız, TürkayTurkey has enjoyed considerable economic growth over the past decade and has a positive economic outlook and strong growth prospects. The country benefits from being located between Europe and the major energy producers in the Middle East in the so-called strategic energy corridor. The issue of Turkey's accession to the EU has long been on the political agenda in Europe. Indeed, Turkey has made considerable efforts to become a full EU member state. However, the accession negotiations for EU membership continue, while Turkey has recently refused to open new accession chapters with the EU and instead has turned its attention to other regional developments. Turkey has strengthened its swtrategic ties with a wide range of countries including those in Europe and the Middle East. It also plays an influential role in a geography that stretches across the former Soviet Union nations. In this paper, the path of Turkey's accession issues is reviewed and the direction of its economy based on the measure of GDP per capita is forecast using an autoregressive integrated moving average model. In addition, the cluster analysis technique is adopted in order to measure the possible standing of Turkey among EU members, the similarities between EU members, and the current path to becoming an EU member state.Article Citation - WoS: 9Citation - Scopus: 11Variant Concept of Transportation-Disadvantaged: Evidence From Aydın, Turkey, and Yamaga, Japan(American Society of Civil Engineers (ASCE), 2011) Duvarcı, Yavuz; Yiğitcanlar, Tan; Alver, Yalçın; Mizokami, ShoshiTransportation-disadvantaged groups have been defined in previous studies as those who are low income earners, are family dependent, have limited access to private motor vehicles and public transport services, and are obliged to spend relatively more time and money on their trips. Additionally the disabled, young, and elderly are commonly considered to be among the transportation-disadvantaged. Although generally this definition seems correct, it is not specific enough to become a universal definition that could apply to all urban contexts. This paper investigates whether perceptions of travel difficulty vary as does the definition of transportation-disadvantaged in socioculturally different urban contexts. For this investigation, the writers undertake a series of statistical analyses in a case study of Yamaga, Japan, and compare the findings with a previous case study, in which the same methodology, hypothesis, and assumptions were applied to a culturally and demographically different settlement in Aydin, Turkey. After comparing the findings observed in Aydin with the statistical analysis results in Yamaga, this paper reveals that there can be no detailed, universal definition of the transportation-disadvantaged. The writers conclude that the characteristics of the transportation-disadvantaged are not globally identical, and policies and solutions that work in one locality may not have the same results in another sociocultural context.Conference Object Citation - Scopus: 6Geodesic Distances for Web Document Clustering(Institute of Electrical and Electronics Engineers Inc., 2011) Tekir, Selma; Mansmann, Florian; Keim, DanielWhile traditional distance measures are often capable of properly describing similarity between objects, in some application areas there is still potential to fine-tune these measures with additional information provided in the data sets. In this work we combine such traditional distance measures for document analysis with link information between documents to improve clustering results. In particular, we test the effectiveness of geodesic distances as similarity measures under the space assumption of spherical geometry in a 0-sphere. Our proposed distance measure is thus a combination of the cosine distance of the term-document matrix and some curvature values in the geodesic distance formula. To estimate these curvature values, we calculate clustering coefficient values for every document from the link graph of the data set and increase their distinctiveness by means of a heuristic as these clustering coefficient values are rough estimates of the curvatures. To evaluate our work, we perform clustering tests with the k-means algorithm on the English Wikipedia hyperlinked data set with both traditional cosine distance and our proposed geodesic distance. The effectiveness of our approach is measured by computing micro-precision values of the clusters based on the provided categorical information of each article. © 2011 IEEE.Conference Object Citation - WoS: 6Citation - Scopus: 8A Cluster-Based Dynamic Load Balancing Middleware Protocol for Grids(Springer Verlag, 2005) Erciyeş, Kayhan; Payli, Reşat ÜmitWe describe a hierarchical dynamic load balancing protocol for Grids. The Grid consists of clusters and each cluster is represented by a coordinator. Each coordinator first attempts to balance the load in its cluster and if this fails, communicates with the other coordinators to perform transfer or reception of load. This process is repetaed periodically. We show the implementation and analyze the performance and scalability of the proposed protocol.