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  • 1
    Language: English
    In: Journal of Hydrology, June 11, 2012, Vol.444-445, p.199(10)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jhydrol.2012.04.019 Byline: Sinan Sahin Keywords: Aridity index; Specific humidity; Precipitation; Turkey Abstract: a* A new aridity index was defined. a* The relationship with specific humidity (S.sub.h) and aridity was showed. a* The I.sub.q index can be calculated with the most readily available variables. a* It was shown that there is no drawback in using the computed S.sub.h . a* I.sub.q index can be used for monitoring climate change and the distribution of aridity. Author Affiliation: Namik Kemal University, Engineering Faculty, Civil Engineering Department, 59860 Tekirdag, Turkey Article History: Received 8 July 2011; Revised 5 April 2012; Accepted 9 April 2012 Article Note: (miscellaneous) This manuscript was handled by Andras Bardossy, Editor-in-Chief, with the assistance of Martin Beniston, Associate Editor
    Keywords: Precipitation (Meteorology) ; Climate Change ; Humidity
    ISSN: 0022-1694
    Source: Cengage Learning, Inc.
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  • 2
    Language: English
    In: Journal of Hydrology, July 11, 2012, Vol.450-451, p.180(10)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jhydrol.2012.04.062 Byline: Sinan Sahin (a), H. Kerem Cigizoglu (b) Keywords: Climate regions; Precipitation regime regions; Hierarchical cluster analysis; Neuro-fuzzy clustering; Turkey Abstract: a* A new neuro fuzzy clustering method were developed. a* A matrix created from the correlation coefficients of the meteorological data was used as input. a* Unlike the studies conducted in Turkey, relative humidity data was employed for cluster analysis. a* Sub-precipitation regime regions of Turkey has been demonstrated for the first time. a* Sub-climate regions of Turkey has been demonstrated for the first time. Author Affiliation: (a) Namik Kemal University, Engineering Faculty, Civil Engineering Department, 59860 Corlu/Tekirdag, Turkey (b) Istanbul Technical University, Faculty of Civil Engineering, Hydraulics Division, 34469 Istanbul, Turkey Article History: Received 23 December 2011; Revised 16 April 2012; Accepted 25 April 2012 Article Note: (miscellaneous) This manuscript was handled by Andras Bardossy, Editor-in-Chief, with the assistance of Martin Beniston, Associate Editor
    Keywords: Precipitation (Meteorology) -- Analysis ; Humidity -- Analysis ; Universities And Colleges -- Analysis
    ISSN: 0022-1694
    Source: Cengage Learning, Inc.
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  • 3
    Language: English
    In: Journal of Hydrology, 11 June 2012, Vol.444-445, pp.199-208
    Description: ► A new aridity index was defined. ► The relationship with specific humidity ( ) and aridity was showed. ► The index can be calculated with the most readily available variables. ► It was shown that there is no drawback in using the computed . ► index can be used for monitoring climate change and the distribution of aridity. The United Nations Environmental Programme (UNEP), defined an aridity index ( ) by the ratio of the annual precipitation and potential evapotranspiration (PET) totals. In this work, specific humidity was used instead of PET and a new aridity index ( ) has been defined using the ratio of annual precipitation totals and annual mean specific humidity ( ). As shown in this study, can be easily computed with very high accuracy (3.569% error rate) with mean temperature, relative humidity and local pressure which are most commonly and widely measured meteorological data. The single point correlation graph of which shows the entrance of aridity through the South Eastern Anatolia Region into Turkey and the distribution of the aridity over Turkey explains the relationship with and aridity. According to the common and different aspects of arid zones found with , and Erinç aridity index ( ), found to be applicable for monitoring climate change and distribution of arid zones.
    Keywords: Aridity Index ; Specific Humidity ; Precipitation ; Turkey ; Geography
    ISSN: 0022-1694
    E-ISSN: 1879-2707
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  • 4
    Language: English
    In: Journal of the American College of Cardiology, 29 October 2013, Vol.62(18), pp.C218-C219
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jacc.2013.08.616 Byline: Sinan Sahin, Murat Ziyrek, Muammer Bilici, Levent Korkmaz, Zeydin Acar Author Affiliation: (1) Trabzon Kanuni Training and Research Hospital, Trabzon (2) Ahi Evren Thorasic and Cardiovascular Surgery Training and Research Hospital, Trabzon (3) Orhangazi Government Hospital, Bursa Article Note: (miscellaneous) PP-343
    Keywords: Medicine
    ISSN: 0735-1097
    E-ISSN: 1558-3597
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  • 5
    Language: English
    In: Journal of Hydrology, November 2018, Vol.566, pp.616-626
    Description: The associations between the seasonal moisture budget (precipitation minus evaporation) and atmospheric and oceanic teleconnections related with dry and wet conditions in the greater Mediterranean Basin are investigated. The driest and wettest Mediterranean winters are selected according to the Standardized Precipitation Index (SPI), and the differences in the moisture budget among them and average conditions (i.e. climatology) are investigated. The analysis focuses on the role of major teleconnection indices for the conditions of the driest/wettest winters. According to the results, the Arctic Oscillation (AO) index is the best indicator of variability in the driest/wettest conditions, which are conventionally associated with the North Atlantic Oscillation (NAO). Large-scale climate variability over the Mediterranean Basin is strongly linked with significant changes of the moisture fluxes in the Gulf of Mexico region and partially in the east coast region of the United States (US), especially for wet years in the Western Mediterranean. The displacement of the prevailing atmospheric centres of action located over the subtropical mid-east Atlantic (Azores high) to the Northwest Atlantic determines the wet conditions over the Western and Eastern Mediterranean Basins, respectively. It is speculated that the relative strengths and positions of these large-scale systems control the Eastern and Western patterns of the Mediterranean climate variability.
    Keywords: Atmospheric Moisture Budget ; Convergence ; Regional and Year to Year Variability ; Teleconnections ; Mediterranean Basin ; Standardized Precipitation Index ; Geography
    ISSN: 0022-1694
    E-ISSN: 1879-2707
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  • 6
    Language: English
    In: Journal of the American College of Cardiology, 29 October 2013, Vol.62(18), pp.C209-C209
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jacc.2013.08.592 Byline: Sinan Sahin, Murat Ziyrek, Zeydin Acar, Muammer Bilici, Mustafa Tarik Agac Author Affiliation: (1) Trabzon Kanuni Training and Research Hospital, Trabzon (2) Ahi Evren Thorasic and Cardiovascular Surgery Training and Research Hospital, Trabzon (3) Orhangazi Government Hospital, Bursa Article Note: (miscellaneous) PP-319
    Keywords: Medicine
    ISSN: 0735-1097
    E-ISSN: 1558-3597
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  • 7
    Language: English
    In: Journal of Hydrology, 11 July 2012, Vol.450-451, pp.180-189
    Description: ► A new neuro fuzzy clustering method were developed. ► A matrix created from the correlation coefficients of the meteorological data was used as input. ► Unlike the studies conducted in Turkey, relative humidity data was employed for cluster analysis. ► Sub-precipitation regime regions of Turkey has been demonstrated for the first time. ► Sub-climate regions of Turkey has been demonstrated for the first time. A matrix created from the correlation coefficients of the meteorological data was used as input for cluster analysis and this application yielded much better results in high cluster solutions as compared to classical approaches. Climate transition regions were observed in high cluster solutions when the matrix created from the correlation coefficients was used as input. Consequently, “sub-precipitation regime regions” and “sub-climate regions” of Turkey were demonstrated for the first time. Unlike the studies conducted in Turkey, relative humidity data was employed for cluster analysis in this study. According to the results, Turkey is composed of seven main precipitation regime regions and 16 “sub-precipitation regime regions” and seven main climate regions and 15 “sub-climate regions”. For the determination of sub-precipitation regime regions and sub-climate regions in Turkey, cluster analysis methods including Ward’s Method and a neuro-fuzzy method (NFM) developed for this study were applied. The NFM was applied on iris data which is commonly used in the literature to test the performance of the cluster analysis methods. With a performance of 95.33%, the method proved to be applicable to cluster analysis problems. Moreover, stability tests performed with different number of stations revealed that the NFM developed in this study is applicable for the cluster analysis.
    Keywords: Climate Regions ; Precipitation Regime Regions ; Hierarchical Cluster Analysis ; Neuro-Fuzzy Clustering ; Turkey ; Geography
    ISSN: 0022-1694
    E-ISSN: 1879-2707
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  • 8
    Language: English
    In: Journal of the American College of Cardiology, 29 October 2013, Vol.62(18), pp.C31-C32
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jacc.2013.08.097 Byline: Murat Ziyrek, Fatma Can, Murat Civan, Sukran Erdem, Zeydin Acar, Sinan Sahin, Cavlan Ciftci Author Affiliation: (1) Istanbul Bilim University Faculty of Medicine (2) Ahi Evren Thoracic and Cardiovascular Surgery Training and Research Hospital, Trabzon Article Note: (miscellaneous) OP-074
    Keywords: Medicine
    ISSN: 0735-1097
    E-ISSN: 1558-3597
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  • 9
    Language: English
    In: The Annals of Thoracic Surgery, July 2018, Vol.106(1), pp.e41-e41
    Keywords: Cardiomegaly -- Complications ; Heart Atria -- Pathology ; Heart Failure -- Etiology;
    ISSN: 0003-4975
    E-ISSN: 1552-6259
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  • 10
    Language: English
    In: Environmental Processes, 2014, Vol.1(3), pp.277-285
    Description: Determination of the longitudinal dispersion coefficient (LDC) of a river is needed in studies regarding cleaning the water and protecting its quality when nuclear, chemical or biological contaminants are discharged into the river. This study presents the development of an empirical equation for predicting the longitudinal dispersion coefficient in natural streams. Factors affecting the uniformity of the flow directly affect the LDC. Therefore, the hydraulic radius, defined as the ratio of the wetted area to the wetted perimeter, was considered as an important factor in determining the LDC. The presented equation relates the dispersion coefficient to hydraulic and geometric parameters of the flow, and was derived using dimensional and least squares analysis. The comparison of the predictions using 128 field data sets measured in 41 rivers in the USA has indicated that the proposed equation is reliable in predicting longitudinal dispersion coefficients in natural streams.
    Keywords: Longitudinal dispersion coefficient ; Rivers ; Contamination ; Empirical equation ; Hydraulic radius
    ISSN: 2198-7491
    E-ISSN: 2198-7505
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