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 novel clustering method built on random weight artificial neural networks and differential evolution

Abstract: Clustering is the process of partition of samples, which have not got any labels, into groups. The main aim of clustering was to achieve the lowest distance between samples in each cluster and to achieve the highest distance between the samples in a cluster with the samples in other clusters. In this paper, a novel clustering approach was proposed. This novel approach was built on the differential evolution, which is a meta-heuristic method that searches for the optimum solution, and the randomized artificial neural network, which is a kind of artificial neural network that has a single hidden layer. To evaluate and validate the proposed approach, 48 datasets were employed. Achieved results by the proposed approach were compared with the obtained results by k-means, hierarchical, k-centers clustering, and some other versions of the proposed approach, which are built on ANN and particle swarm optimization, and harmony search methods. It was found that the proposed approach is successful enough to be employed for clustering in terms of achieved inner and outer distance.

Beden eği̇ti̇mi̇ ve spor öğretmenleri̇ni̇n örgütsel si̇ni̇zme i̇li̇şki̇n algilarinin örgütsel bağliliklari üzeri̇ndeki̇ etki̇si̇

Abstract: Bu arastirmanin amaci beden egitimi ve spor ogretmenlerinin orgutsel sinizme iliskin algilarinin orgutsel bagliliklari uzerindeki etkisini tespit etmektir. Arastirma iliskisel tarama modelinde yapilmistir. Arastirmanin evrenini, Siirt il ve ilce merkezlerindeki ortaokul ve liselerde gorev yapan 162 beden egitimi ve spor ogretmeni olusturmaktadir. Arastirmada ogretmenlerin orgutsel sinizm duzeylerini belirlemek icin Sagir ve Oguz (2012) tarafindan gelistirilen orgutsel sinizm olcegi ve orgutsel baglilik duzeylerini belirlemek amaciyla Balay (2000) tarafindan gelistirilen orgutsel baglilik olcegi kullanilmistir. Arastirma sonucunda beden egitimi ve spor ogretmenlerinin okullarina en fazla icsellestirme boyutunda baglilik duyduklari (iyi duzeyde), bunu ozdeslesmeye dayali boyutun izledigi (orta duzeyde) ve uyum boyutunun ise en dusuk duzeyde (cok az katiliyorum) gerceklestigi tespit edilmistir. Beden egitimi ve spor ogretmenlerinin genel olarak orta duzeyde orgutsel sinizm yasadiklari belirlenmistir. Orgut bagliligin icsellestirme alt boyutu ile orgutsel sinizmin performansi dusuren etkenler, calistigi kurumdan uzaklasma ve okula karsi olumsuz tutum alt boyutlari arasinda negatif yonde ve dusuk duzeyde, calistigi kurumda uygulamalara katilma alt boyutu arasinda ise pozitif yonde ve orta duzeyde bir iliski oldugu belirlenmistir. Orgut bagliligin ozdeslesme alt boyutu ile orgutsel sinizmin performansi dusuren etkenler alt boyutu arasinda anlamli bir iliski olmadigi, calistigi kurumdan uzaklasma alt boyutu arasinda negatif yonde ve orta duzeyde, okula karsi olumsuz tutum alt boyutu arasinda ise negatif yonde ve dusuk duzeyde iliski oldugu, calistigi kurumda uygulamalara katilma alt boyutu arasinda ise pozitif yonde ve dusuk duzeyde bir iliski oldugu goze carpmaktadir. Orgut bagliligin uyum alt boyutu ile orgutsel sinizmin performansi dusuren etkenler, calistigi kurumdan uzaklasma ve okula karsi olumsuz tutum alt boyutlari arasinda pozitif yonde ve dusuk duzeyde, calistigi kurumda uygulamalara katilma alt boyutu arasinda ise anlamli bir iliski olmadigi saptanmistir. Bununla birlikte yapilan regresyon analizi sonucunda beden egitimi ve spor ogretmenlerinin orgutsel sinizme iliskin algilarinin orgutsel bagliliklarini anlamli bir sekilde yordadigi tespit edilmistir. Bu sonuclar dogrultusunda calismanin amaci dikkate alinarak oneriler sunulmustur

Investigation of influence of approach angle and chip slenderness ratio on vibration, chip formation and surface quality in turning of AISI 1050 steel

Abstract: Machining method and its outcomes are significant in manufacturing operations, but determined vibrations in the process, quite hard to solve, rising from the natural mechanism of the process. Numerous parameters affect the machinability outcomes, such as surface roughness, chip morphology, tool wear, and fluctuations in the process. In this paper, 15°, 30°, and 45° approach angles, 1, 3, 5, 10, and 15 chip slenderness ratios (CSR), selected as the ratio of the cutting depth to the feed rate, were selected. Therefore, the effects of the cutting edge approach angle and CSR on the conclusions were investigated. At 15° approach angle, the severe and unstable vibrations were recorded, including the cracks, the chip serration with high pitch size, hard distortion cracks, and the largest tool wear areas which were observed on-chip morphology, but only at low CSR values and 45° approach angle. The highest fluctuations were taken place in the direction of cutting depth (X), for all selected parameters. The optimum results were recorded at 30° approach angle and 15 CSR, but the hardest deformation cracks seemed at 1 CSR. Additionally, Co, involved in the structure of the cutting tool as a binder, transfer to the removed chip, while Fe, from the workpiece to the cutting tool, during the process.

Gaseous emission comparison of a compression–ignition engine fueled with different biodiesels

Abstract: In this study, it was performed a comparison of the performance and emissions of two methyl ester fuels: one obtained from animal fat and the other from crude canola oil, in a compression-ignition engine against diesel fuel. The experimental results compared with diesel fuel showed that significant reductions could be obtained by biodiesel derived from animal fat in carbon monoxide and oxides of nitrogen emissions. Carbon dioxide emissions showed a trend of decreasing with the biodiesel fuels. An increase in brake specific fuel consumption was observed for different biodiesel fuels when compared with diesel fuel. It was concluded that animal tallow methyl ester performed better than canola oil methyl ester, whereas slightly higher brake torque is observed with canola oil methyl ester.

Performance of Pressuremeter Tests to Estimate the Position of the Sliding Surface: A Case Study in Zonguldak, Turkey

Abstract: Landslides along the Black Sea region in Turkey are frequent. The rapid increase in population and the consequent increased scarcity of land has been forcing the utilization of problematic areas for urbanization. These areas must be observed continuously and probable landslides must be determined beforehand. The use of inclinometers is the most commonly accepted and reliable monitoring method for assessing areas at risk of landslides. However, this method has the drawback of requiring demanding and long-term measurements. In this study, comprehensive investigations were carried out to determine the performance of the pressuremeter test for in situ measurement methods to expeditiously estimate the position of the slip surface. A sliding area on the Karadon Formation in Kozlu County, Zonguldak, Turkey was chosen for investigations. Observations and topographic measurements performed to assess the failure mechanism, and the obtained results specified that the movement type was a circular sliding. The in situ test results revealed that, the failure zone determined using the pressuremeter tests was in good agreement with the failure depths determined by inclinometer measurements.