Batman University

About: Batman University is a education organization based out in Batman, Turkey. It is known for research contribution in the topics: Diesel fuel & Diesel engine. The organization has 300 authors who have published 810 publications receiving 10346 citations. The organization is also known as: Batman Üniversitesi.

A Robust Data-Driven Approach for Fault Detection in Photovoltaic Arrays

Abstract: n this paper, a robust data-driven method for fault detectionin photovoltaic (PV) arrays is proposed. Our method is based onthe random vector functional-link networks (RVFLN) which has theadvantage of randomly assigning hidden layer parameters with no tuning. To eliminate the effect of measurement noise and overfitting in thetraining process which reduce the fault detection accuracy, the sparseregularization method is utilized which uses l2−norm with loss weighting factor to compute the output weights. To attain a strong robustnessagainst the outlier samples, the non-parametric kernel density estimationis employed to assign a loss weighting factor. Through rigorous simulation studies, we validate the performance of our proposed method in detectingthe short and open circuit faults based on only the output current andvoltage measurements of PV arrays. In addition to a stronger robustnesscomparing with the least square-support vector machine, we also showthat our proposed method provides 80% and 100% average detection accuracy for short circuit and open circuit, respectively.

A Review of Genus Dysgonia Hübner (Lepidoptera, Erebidae, Erebinae) from Turkey with Distinctive External and Genital Morphological Characters and a New Species for the Turkish Fauna

Abstract: The genus Dysgonia Hubner, [1823] from Turkey is reviewed and one newly recorded species, D. rogenhoferi (Bohatsch, 1880) is reported. The generic and distinctive morphological characters, based on all species in Turkey, are summarized. Illustrations of external features and genitalia are presented.

Miniature Centrifuge Modeling for Conventional Consolidation Test

Abstract: Consolidation parameters are usually determined in the laboratory with oedometer tests in earth gravity conditions (1 g). However, performing the test is very time-consuming. Although dynamic approaches in which higher accelerations are applied have been developed as an alternative to the static approaches to reduce the duration of consolidation tests, these methods are expensive and require huge centrifuges. Moreover, the focus for these centrifuges is more on research than on practical applications. This study discusses the applicability of a small-sized centrifuge device in consolidation tests. The particular device developed for this study is a very small centrifuge compared to other examples around the world. The results revealed that employing this device in the tests reduced test duration to a couple of hours. Identical soil samples with a zero disturbance were prepared in the laboratory and used in the experiments. A new parameter, equivalent centrifuge load (Wce), was defined to correlate the results from the proposed approach with the conventional consolidation-test results. An empirical relationship was developed to transform the axial strain (ϵ)–equivalent centrifuge load (Wce) dataset obtained from the centrifuge tests to ϵ–effective stress (σ′) data pairs. The empirical relationship could predict the virgin compression line with a high level of accuracy while it predicts the preconsolidation stress (σ′p) with moderate accuracy. These relationships were applied to natural soil samples, and the findings are very promising.

Gas hydrate potential of the Sea of Marmara

Abstract: In this study, the gas hydrate potential of the Sea of Marmara was analyzed in detail in terms of energy resource potential and environmental geohazards. Initially, GHSZ thickness maps for different gas compositions in the Sea of Marmara were drawn according to the estimations made by using HEP simulator and an algorithm developed in this study. Pure/nearly pure CH4 hydrate is not stable in the conditions of the Sea of Marmara, but thermogenic gas hydrates were recovered in the Sea of Marmara. It was shown that when C3H8, CO2, and H2S concentration in gas compositions increases, the thickness of GHSZ also increases. For the best scenario, GHSZ thickness is nearly 287.2 m below the seafloor. Technically recoverable natural gas hydrate potential in the Sea of Marmara is up to 125.8 bcm (billion cubic meters). In this study, it was proposed that the importance of gas hydrates in the Sea of Marmara is higher in terms of environmental perspectives rather than its energy resource potential. Up to 1820.2 bcm of natural gas might be stored in sII gas hydrates of the Sea of Marmara. In terms of environmental perspectives, free gas sections in the bottom of gas hydrates at the bottom boundary of GHSZ are risky because the possible connection of the free gas section with the seafloor due to tectonic activities might cause catastrophic results for the environment. Overall, gas seeps through the atmosphere are possible in the Sea of Marmara, where is crossed lengthwise by the Northern branch of the North Anatolian Fault (NAF).

Kelebek Gözlemciliği ve Türkiye nin Kelebek Turizm Potansiyeli

Abstract: Butterfly watching is an important wildlife watching and special interest tourism activity in recent years. Turkey has a rich fauna in butterfly species and host to the many endemic species but a comprehensive review of the literature research about the ties between the butterfly watching and tourism interests in Turkey is not yet complete. The purpose of this study is to reveal that there is another tourism type in point of alternative tourism activities of Turkey by considering the tourism potential of butterfly watching in Turkey. For this purpose, developments in butterfly watching and Turkey's butterfly diversity are investigated by literature review. In this research, it has been determined that butterflies also have an important potential in destination development and diversification such as other wildlife tourism values. However, it can also be contributed to rural development by determining important butterfly areas and organizing guided tours. Also, it is thought that nature-based alternative tourism types, away from crowded masses and made with small groups in natural areas such as butterfly watching and photography, will become more popular.