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Berna Yavuz Pehlivanli
Ankara University
7Publications
1H-index
3Citations
Publications 7
Newest
Berna Yavuz Pehlivanli1
Estimated H-index: 1
,
Sukru Koc1
Estimated H-index: 1
,
AliSARI4
Estimated H-index: 4
Feature selection provides model extraction by using the necessary / related features and improves classification. Feature selection is a desired process at eliminating irrelevant and redundant features in data. Classification is used to distribute the data in a balanced way among the various classes defined in the data as a result of the feature selection. In this paper, we investigated the feature selected classification performance in cancer data of recently proposed Artificial Bee Colony Pro...
Şükrü Koç3
Estimated H-index: 3
(Ankara University),
AliSARI4
Estimated H-index: 4
(Ankara University),
Berna Yavuz Pehlivanli1
Estimated H-index: 1
(Ankara University)
Abstract In this study trace element and radioactive element contents of the Hatildag oil shale (HOS) in Turkey and geochemical processes controlling the deposition of these elements are investigated. Ratios of redox-sensitive elements show that HOS were formed in mostly dioxic-anoxic and partly euxinic conditions. Element contents of shales in the northern part are associated mostly with clays and slightly with organic material. It was determined that uranium in southern part is derived from ph...
Orhan Ozcelik4
Estimated H-index: 4
(Akdeniz University),
Berna Yavuz Pehlivanli1
Estimated H-index: 1
(Ankara University)
+ 3 AuthorsNeslihan Unal (Akdeniz University)
ABSTRACTIn this study, geochemical behavior of elements is investigated in 25 coal samples collected at 10 locations of Şahinli coaliferous units at southeast of Aydin, Turkey. In all the samples, X-ray powder diffraction and inductively coupled plasma mass spectrometry analyses were performed and element and mineral compositions were determined. Total organic carbon (TOC) values of coals are between 14.6 and 37.7 wt% with average of 28.5 wt%. Samples are composed of quartz, calcite, feldspar, d...
Published on Nov 1, 2014in Fuel5.13
Berna Yavuz Pehlivanli1
Estimated H-index: 1
(Ankara University),
Şükrü Koç3
Estimated H-index: 3
(Ankara University),
AliSARI4
Estimated H-index: 4
(Ankara University)
Abstract Cayirhan oil shales situated 100 km NW of Ankara were formed in the Hirka formation of the middle Miocene age. This formation is a volcanosedimentary sequence and represented by a high content of organic material (TOC 2.08–23.29%, average 9.53%). Paleoecological and paleoclimate conditions during the formation of these shales were outlined by geochemical proxies. Results of the organic geochemical studies determined high Total Organic Carbon (TOC) contents and S 2 values and kerogen is ...
Published on Feb 1, 2014in Acta Geologica Sinica-english Edition
Berna Yavuz Pehlivanli1
Estimated H-index: 1
,
Çükrü Koç1
Estimated H-index: 1
(Ankara University)
+ 1 AuthorsHilal Engin1
Estimated H-index: 1
(Ankara University)
In this study uranium and thorium contents and depositional characteristics of Cayirhan bituminous shales (CBS), west of Ankara (central Anatolia), are investigated. Samples used were collected from boreholes opened by Park Holding Ltd. A total of 25 samples were taken from bituminous shale levels in boreholes drilled at 6 different locations in the study area. The Hirka formation which hosts bituminous shale deposits is a volcano sedimentary sequence and all lithofacies indicate that a lacustri...
Published on Jan 1, 2012in Turkish Journal of Botany1.09
Berna Yavuz Pehlivanli1
Estimated H-index: 1
,
Şükrü Koç3
Estimated H-index: 3
+ 3 AuthorsMecit Vural12
Estimated H-index: 12
Oil shales are exposed in wide areas around the town of Cayirhan (Beypazari-Ankara). It is known that some elements are enriched in oil shales and similar organic-material rich rocks. The purpose of this study was to understand the possible relations between the element abundances found at the Cayirhan oil shales (COS) and those of some plant types growing on these rocks. The results of chemical analysis of selected plants (8 species) were compared with each other and with element abundances fro...
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