1,347,811 research outputs found

    Presenting Schur superalgebras

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    We provide a presentation of the Schur superalgebra and its quantum analogue which generalizes the work of Doty and Giaquinto for Schur algebras. Our results include a basis for these algebras and a presentation using weight idempotents in the spirit of Lusztig's modified quantum groups.Comment: 28 pages, to appear in the Pacific Journal of Mathematic

    Turkey

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    A model for characterising the collective dynamic behaviour of evolutionary algorithms

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    Exploration and exploitation are considered essential notions in evolutionary algorithms. However, a precise interpretation of what constitutes exploration or exploitation is clearly lacking and so are specific measures for characterising such notions. In this paper, we start addressing this issue by presenting new measures that can be used as indicators of the exploitation behaviour of an algorithm. These work by characterising the extent to which available information guides the search. More precisely, they quantify the dependency of a population's activity on the observed fitness values and genetic material, utilising an empirical model that uses a coarse-grained representation of population dynamics and records information about it. The model uses the k-means clustering algorithm to identify the population's "basins of activity". The exploitation behaviour is then captured by an entropy-based measure based on the model that quantifies the strength of the association between a population's activity distribution and the observed fitness landscape information. In experiments, we analysed the effects of the search operators and their parameter settings on the collective dynamic behaviour of populations. We also analysed the effect of using different problems on algorithm behaviours.We define a behavioural landscape for each problem to identify the appropriate behaviour to achieve good results and point out possible applications for the proposed model

    Private Supplementary Tutoring in Turkey Recent Evidence on Its Various Aspects

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    This paper first describes the educational system in Turkey and the two national examinations for advancing upper levels of schooling which give raise to the demand for private tutoring called “dersane” in Turkish. Second, the evolution of the Private tutoring Centers (PTC) are described and compared with the high schools in the country. Third, geographical distribution of the PTC, general high schools and the proportion of high school age population are compared over the provinces to give an idea about special equity issues. Other topics addressed include gender and PTC students, disruption of mainstream education, determinants of the demand for services of the PTCs, cost of PTCs and evidence on the effectiveness of PTCsPrivate Tutoring, Education, Demand for Education

    Suctorian ciliates (Ciliophora, Suctorea) as epibionts of stream-dwelling aquatic beetles (Coleoptera) and water mites (Acari: Hydrachnidia) in the southwestern Palaearctic region

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    Based on original data from recent research, numerous new records of the suctorian species living as epibionts on streamdwelling aquatic beetles (Coleoptera) and water mites (Acari, Hydrachnidia) in the southwestern Palaearctic area are given. The following species are reported for the first time for the national faunas: Setodiscophrya deplanata (Matthes, 1954) (Bosnia and Hercegovina, Montenegro, Serbia, Bulgaria, Turkey), Discophrya helmidis Matthes, 1954 (Montenegro, Turkey), Elatodiscophrya hochi (Matthes, 1954) (Bosnia and Hercegovina, Turkey), Periacineta buckei (Kent, 1881) (Montenegro, Greece), Discophrya lichtensteinii (Claparede & Lachmann, 1859) (Turkey, Iran). The characteristics of the suctorians as epibionts of stream-dwelling arthropods are briefly outlined

    The determinants of foreign direct investment in Turkey: an empirical analysis

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    This study examines the determinants of foreign direct investment (FDI) and the effect of FDI on trade in a panel of bilateral outward FDI stocks of 19 OECD countries in Turkey between 1982 and 2007. Employing a knowledge-capital model, this study finds that joint national incomes, per capita difference, investment liberalisation and the cost of exporting to Turkey have significant effects on FDI in Turkey. In addition, the prospect of European Union membership, government stability, infrastructure, bilateral exchange rate, exchange rate volatility and openness to trade play an important role in determining the amount of FDI in Turkey. Moreover, this study finds that high relative unit labour costs and corruption provide stimuli to FDI. Using an augmented gravity model to investigate the relationship between FDI and imports, this study finds that outward FDI stocks are positively related to the exports. Overall, the empirical results indicate that FDI in Turkey is mainly motivated by market access and sensitive to the quality of institutions

    Export Price Stability and Compatibility of Euro under the Export- Biased Productivity Growth in Turkey: A Criticism against the Maastricht Inflation Criterion

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    In this work, we analyzed the export- biased productivity, wage growth and the ULCP in Turkey. Then, by using input- output methods , we could show that Turkey has an economy which is able to be a part of the Euro system and Euro is compatible under the export- biased productivity growth in Turkey though its relatively high inflation. That means Maastricht inflation criterion should be revised in terms of countries’ economic performance

    FEUTURE EU 28 Country Report. Estonia

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    Relations between Estonia and Turkey received renewed impetus after 2004, when Estonia joined the European Union (EU) (while Turkey was in the process of securing the official candidate status) and NATO, of which Turkey has been a member since 1952. Since its accession, Estonia has played a generally constructive role at the EU level when it comes to both its institutional future and enlargement policy. Its key tenets, thereby, seem in line with the principled open-door approach advocated by the fellow Nordic countries
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