Bayesian stable mixture model of state densities of generalized Chua's circuit

In this paper, the probability density functions (PDFs) of the states of Generalized Chua's Circuit (GCC) have been modeled by Finite Mixture α-Stable (FMαS) distributions which is a Bayesian mixture model of α-stable distributions and it provides semiparametric characterization for the distributions of multiscroll chaotic attractors. Fully Bayesian approach has been applied to estimate the mixture parameters of multimodal distributions corresponding to the multiscroll chaotic attractors

Basin stability of single machine infinite bus power systems with Levy type load fluctuations

10th International Conference on Electrical and Electronics Engineering, ELECO 2017; Bursa; Turkey; 29 November 2017 through 2 December 2017In this paper, the basin stability of single machine infinite bus power systems with alpha-stable Levy type load fluctuations are investigated over the parameter space of mechanical power and damping parameter. The probabilities of returning to the stable equilibrium point are calculated for different characteristic exponent and skewness parameters of alpha-stable Levy noise to see the effect of impulsive and asymmetric load fluctuations

Does pelvic injury trigger erectile dysfunction in men?

WOS: 000442089500008PubMed ID: 26764545Purpose: Pelvic ring fractures constitute 3%-8% of all fractures of the skeletal system and are generally related with high energy trauma. Sexual dysfunction following pelvic fracture has a high incidence, and affects the male patients both physically and psychologically. In this study, we aimed to investigate the impact and frequencies of comorbidities such as erectile dysfunction (ED) with adverse sociocultural and psychological consequences for the patient who had a pelvic ring fracture. Methods: This study included 26 men who corresponded to the inclusion criteria and agreed to participate our study. Results: According to fracture types, most of our cases were Tile type A1 and type A2. Severe and moderate ED were detected in 46.1% (12/26) of these patients via the International Index of Erectile Function-5 questionnaire. Conclusion: ED develops following pelvic fractures, especially in Tile type B and C pelvic fractures

Is There a Relationship between Maxillary Sinus Findings and Skeletal Malocclusion?

Objective:No study has investigated the relationship between maxillary sinus findings and skeletal malocclusion based on conebeam computed tomography (CBCT). The aim of the present study was to determine the relationship between the frequency of sinus findings and patients’ skeletal malocclusion classification.Objective: No study has investigated the relationship between maxillary sinus findings and skeletal malocclusion based on conebeam computed tomography (CBCT). The aim of the present study was to determine the relationship between the frequency of sinus findings and patients’ skeletal malocclusion classification.Methods:A total of 105 CBCT scans were examined and divided into three groups according to skeletal classification. Two experienced observers reviewed the CBCT images and recorded all the maxillary sinus findings. The patients’ skeletal malocclusion, thickness of the Schneiderian membrane, and pathological sinus findings were evaluated.Results:The sinus findings were classified into four groups: 0=no finding, 1=mucosal thickening, 2=partial opacification with liquid accumulation, and 3=total opacification. Statistical analysis showed that there was no correlation between the skeletal malocclusion and pathological sinus findings. However, there were significant differences in the Schneiderian membrane thickness between the groups.Conclusion:The Schneiderian membrane thickness was significantly different in Class II and Class III patients. There was no relationship between pathological sinus findings and skeletal malocclusions

Identification of resistance to Eurygaster integriceps Put. on some bread wheat genotypes

Sunn pest (Eurygaster integriceps Put.) is one of the most important pests of wheat in Eastern Europe including Turkey, West and Cen-tral Asia. Its damage on leaves, stems, spikes and grains reduce the baking quality of flour made from damaged grains. In this study, some wheat genotypes from Turkey and ICARDA were evaluated for the pest resistance. The genotypes were planted in a randomized block design using hill plots in nylon mesh screening cages in wheat growing season of 2011-2012 and 2012-2013. Sunn pest population was collected from Çanakkale province, where the pest was intensely found in recent years. The plants of each hill plots were infested with one male and one female Sunn pest adults. The results with 12.5% sucking damage showed that the genotypes from ICARDA had higher resistance than the landraces from Turkey to Sunn pest. Especially, the genotypes IC3 and IC4 from ICARDA and TR7 from Turkey with respect to their SED and DSED values were found the most promising genotypes resistant to Sunn pest for future breeding programs

Doğu Akdeniz'de mevcut farklı ekosistemlerin - upwelling bölgeleri, açık deniz ve kıta sahanlığı suları - dinamikleri, bakteriyel ve birincil üretim potansiyelleri, üst trofik seviyelere yansımaları

TÜBİTAK ÇAYDAG15.10.2014Türkiye denizleri, su bütçesi, atmosferik ve karasal girdiler, taban topoğrafyası, iklimsel evrim gibi temel etkenlerin belirlediği fiziksel, kimyasal, biyolojik özellikler bakımından büyük farklılıklar içeren zengin ve değişken deniz ekosistemlerini barındırmaktadır. Birincil üretim potansiyelleri açısından Karadeniz’in özellikle kuzeybatı kıta sahanlığı ötrofik, Marmara Denizi ve körfezleri ileri derecede ötrofik, Ege Denizi ve Doğu Akdeniz oligotrofik yapı sergilemektedir. Özgün bir dinamiği olan Doğu Akdeniz, genelde bir uç oligotrofik sistem olarak tanımlansa da, kendi içinde önemli bölgesel farklılıklar göstermektedir. Özellikle karasal tatlı su ve besin girdilerinden etkilenen kuzeydoğu kıta sahanlığı (Mersin ve İskenderun Körfezleri) ve ‘upwelling’ dinamiğinden etkilenen Rodos döngüsünde önemli düzeylerde birincil üretim potansiyeline sahiptirler ve daha yoksul olan açık denizden farklıdırlar. Aktif dinamik yapıya ve zengin biyolojik çeşitliliğe sahip kıyısal denizlerimizin sürekli gözlem, analiz ve model öngörüleri aracılığıyla araştırılmasının sürdürülmesi, büyük stratejik önemi haizdir. Çalışma O.D.T.Ü. Deniz Bilimleri Enstitüsü Araştırma Gemisi Bilim-2 ile anılan sahalarda ve istasyonlarda mevsimsel bazda gerçekleştirilmiştir. Bu çalışma ile fonksiyonel olarak üç farklı ekosistemi teşkil eden alanlarda bakteriden balıklara uzanan besin zincirinde olası yapısal farklılıklar, üretim potansiyelleri, dinamikleri karşılaştırılmış, toplanan diğer çevre faktörleri ile etkileşimleri irdelenmiştir.Turkish seas accommodate rich and varied marine ecosystems which are diverse in their physical, chemical, biological characteristics as a result of differences in basic driving factors such as the water budget, atmospheric and land-based inputs, bottom topography, climatic evolution. In terms of primary production potential, the Black Sea especially the northwestern continental shelf exhibits eutrophic characteristics, while Marmara Sea and its bays are highly eutrophic, and Aegean and Eastern Mediterranean Seas display oligotrophic structure. Although the Eastern Mediterranean with its rather unique characteristics is often defined as an ultra-oligotrophic system, there are significant regional differences within the system. The northeastern continental shelf (Mersin and İskenderun Bays) influenced by land-based fresh water and nutrient sources and the Rhodes Gyre influenced by ‘upwelling’ dynamics have potential for high primary production, while the open sea is relatively poor. Continued research through continuous observations, analyses and model predictions have immense strategic importance for the well being of our coastal seas possessing energetic dynamics and rich biological diversity. It is proposed that the physical-biochemical variability of the diverse northern Levantine Sea ecosystems be investigated through systematic observations during oceanographic cruises, as well as model-based predictions. Study has been conducted seasonally aboard Research Vessel Bilim-2 of the Institute of Marine Sciences of Middle East Technical University in the referred areas and stations. Throughout the study, in areas that represent the three different functional ecosystems, possible structural differences, productivity potential, and dynamics were compared in the food chain spanning bacteria to fish, and their interactions with the other environmental factors were investigated

Stochastic bifurcation in generalized chua's circuit through alpha-stable levy noise

24th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2017; Hilton BatumiBatumi; Georgia; 5 December 2017 through 8 December 2017In this study, we investigate the changes in the dynamics of generalized Chua's circuit through a-stable Levy noise in the framework of stochastic bifurcation concept. By choosing the noise intensity, characteristic exponent (impulsiveness parameter) and the skewness parameter of the a-stable Levy noise as the bifurcation parameters we have observed the qualitative changes in the stationary probability distributions and in the structures of the stochastic attractors

Optimization of thermal insulation material and thickness for building energy efficiency in Mediterranean climates based on life cycle perspective

Çetintaş, Kemal Ferit (Arel Author)Optimizing thermal insulation thickness to save energy and reduce carbon emissions in Mediterranean climates is important. Many standards and regulations on energy efficiency or thermal insulation focus insulation thickness without considering life cycle energy efficiency or environmental impacts. This may lead to unexpected and undesirable results. A new approach for identifying the optimal insulation material and thickness has been applied to a multi-storey residential building in a Mediterranean climate in Turkey. The approach considers life cycle energy consumption, carbon emissions and cost. Energy performance is calculated with details of occupancy, lighting system and internal gains. Results are compared with those of the same building in a cold climate region to show how climate affects life cycle energy and carbon performance. The results of the study show that if insulation thickness is not optimized for a material’s entire life cycle, it may end up being less efficient, more expensive, and have greater carbon emissions than expected, especially in Mediterranean climates. © 2017, Istanbul Teknik Universitesi, Faculty of Architecture. All rights reserved

A new approach to determine insulation material and thickness from a life-cycle perspective

#nofulltext# --- Çetintaş, Kemal Ferit (Arel Author), Yılmaz, Zerrin (Arel Author)Energy-efficient retrofitting of buildings is an important topic for the future world. Adding thermal insulation to the building envelope is the most common and well-known measure, but existing strategies for energy-efficient retrofits do not consider the life-cycle energy consumption and carbon dioxide (CO2) emissions of the insulation materials. This paper introduces a new approach for selecting the optimum insulation material and thickness based on life-cycle energy consumption and carbon dioxide emissions. The approach was applied to a multi-storey residential building located in I. zmir, Turkey, which has a Mediterranean climate, and the results are compared with the same building in Erzurum, Turkey, which has a cold climate. The comparison reveals the effect of thermal insulation on energy consumption and carbon dioxide emissions. The results show that increasing thermal insulation thickness provides less energy efficiency in the Mediterranean climate than in the cold climate. In addition, if the thickness is not optimised according to the insulation material, the life-cycle carbon dioxide emissions and energy consumption may increase contrary to expectations. Extruded polystyrene insulation with 3 cm thickness for the Mediterranean climate and rock wool insulation with 9 cm thickness in cold climate have the optimum life-cycle energy and carbon dioxide emission performance for the case-study building

Basin stability of single machine infinite bus power systems with Levy type load fluctuations

10th International Conference on Electrical and Electronics Engineering, ELECO 2017; Bursa; Turkey; 29 November 2017 through 2 December 2017In this paper, the basin stability of single machine infinite bus power systems with alpha-stable Levy type load fluctuations are investigated over the parameter space of mechanical power and damping parameter. The probabilities of returning to the stable equilibrium point are calculated for different characteristic exponent and skewness parameters of alpha-stable Levy noise to see the effect of impulsive and asymmetric load fluctuations