A minimal integer automaton behind crystal plasticity

Power law fluctuations and scale free spatial patterns are known to characterize steady state plastic flow in crystalline materials. In this Letter we study the emergence of correlations in a simple Frenkel-Kontorova (FK) type model of 2D plasticity which is largely free of arbitrariness, amenable to analytical study and is capable of generating critical exponents matching experiments. Our main observation concerns the possibility to reduce continuum plasticity to an integer valued automaton revealing inherent discreteness of the plastic flow.Comment: 4 pages, 5 figure

Climbing depth-bounded adjacent discrepancy search for solving hybrid flow shop scheduling problems with multiprocessor tasks

This paper considers multiprocessor task scheduling in a multistage hybrid flow-shop environment. The problem even in its simplest form is NP-hard in the strong sense. The great deal of interest for this problem, besides its theoretical complexity, is animated by needs of various manufacturing and computing systems. We propose a new approach based on limited discrepancy search to solve the problem. Our method is tested with reference to a proposed lower bound as well as the best-known solutions in literature. Computational results show that the developed approach is efficient in particular for large-size problems

Nonisocyanate based polyurethane/silica nanocomposites and their coating performance

A series of silica nano-particles with different size were prepared by sol–gel technique, then surface modification by using cyclic carbonate functional organoalkoxysilane (CPS) was performed. Various amounts of carbonated silica particles directly added into carbonated soybean oil (CSBO) and carbonated polypropylene glycol (CPPG) resin mixture to prepare polyurethane–silica nanocomposite coating compositions by nonisocyanate route using an aliphatic diamine as a curing agent. Cupping, gloss, impact, and taber abrasion tests were performed on aluminum panels coated with those nano-composite formulations and tensile tests, thermogravimetric and SEM analyses were conducted on the free films prepared from the same coating formulations. An increase in abrasion resistance of CSBO-CPPG resin combination with the addition of silica was observed. In addition, the maximum weight loss of CSBO-CPPG resin combination was shifted to higher temperatures with incorporation of silica nano-particles The positive effect of modified silica particles on thermal stability of CSBO-CPPG system could be explained in such a way that PPG chains are able to disperse particles in the medium throughout the interactions between ether linkages and silanol groups

Surface-charge-induced freezing of colloidal suspensions

Using grand-canonical Monte Carlo simulations we investigate the impact of charged walls on the crystallization properties of charged colloidal suspensions confined between these walls. The investigations are based on an effective model focussing on the colloids alone. Our results demonstrate that the fluid-wall interaction stemming from charged walls has a crucial impact on the fluid's high-density behavior as compared to the case of uncharged walls. In particular, based on an analysis of in-plane bond order parameters we find surface-charge-induced freezing and melting transitions

Sizing, design, and installation of an isolated wind–photovoltaic hybrid power system with battery storage for laboratory general illumination in Afyonkarahisar, Turkey

power generation system of a size able to meet the electric power requirement for general illumination of the electric laboratory at Afyon Kocatepe University was dimensioned and installed. While determining the installation power of the hybrid wind–solar power generation system, the regional wind–solar energy potential and the magnitude of demanded power were the most important factors. It was decided to supply 400 W of the total 500 W of electric power required by the lamp group used for illumination of the electric laboratory from solar panels and 100 W from a wind turbine according to the wind–solar energy potential of the region and the cost analysis. For the hybrid energy-generation system that was designed and installed, by considering the data for the annual mean sunshine period and wind speed, the most suitable system components and thus the installation cost were determined. The electric power generated by the hybrid wind–solar power generation system and the electric power consumed by the laboratory illumination elements supplied with this system during one year were compared. According to the 12-month measurement results for power generation and consumption in the installed system, it was observed that the generated electric power was higher than the consumed electric power. Consequently, by not paying the total electric bill for electric power consumed by the general illumination elements, use of it for other education expenses was made possible. Besides, the installation costs in Turkey were compared with those in the countries of Denmark, Germany, Spain, and Portugal, where two important components of the dimensioned and installed hybrid wind–solar power generation system – wind and solar energy – are used effectively

BACK TO THE YEAR WHEN IT ALL STARTED: LOCAL DETERMINANTS OF PARTY PREFERENCES IN 2002 TURKISH ELECTIONS

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Gyrodactylus scardiniensis ve Gyrodactylus prostae (Platyhelminthes) türlerinin anatomik ve morfolojik özellikleri üzerine bir araştırma

Bu çalışmada, Nisan 2010 ile Mayıs 2011 tarihleri arasında Taşoluk Baraj Gölü’nden temin edilen 150 Leuciscus cephalus bireyinin Gyrodactylus parazitleri üzerinde incelemeler yapılmış ve iki Gyrodactylus türü tanımlanmıştır. 272 adet Gyrodactylus scardiniensis (%21.3, 6.6±4.1) konak balıkların solungaç lameli ve yüzgeçlerinde, 64 adet Gyrodactylus prostae (%5.3, 6.6±4.1) solungaç yaylarında kaydedilmiştir. Bu türler Türkiye parazit faunası için yeni kayıt özelliği taşımaktadır. Bu çalışmada söz konusu iki Gyrodactylus türünün anatomik ve morfolojik özellikleri ayrıntılı olarak belirlenmiştir.In this study, the presence of Gyrodactylus parasites on 150 Leuciscus cephalus specimens from Taşoluk Dam Lake, Turkey were investigated between April 2010 and May 2011, and two Gyrodactylus species were identified: 272 Gyrodactylus scardiniensis (%21.3, 6.6±4.1) was found on gill branches and fins of the host fish specimens; 64 Gyrodactylus prostae (%5.3, 6.6±4.1) on gill arches. These species are new records for parasite fauna of Turkey. In this study, anatomic and morphological features of these two Gyrodactylus species were determined in detail

How high is the inter-observer reproducibility in the LIRADS reporting system?

Purpose: To investigate the reproducibility of LIRADS v2014 and contribute to its widespread use in clinical practice. Material and methods: This retrospective, single-centre study was conducted between January 2010 and October 2015. A total of 132 patients who had dynamic magnetic resonance imaging (MRI)/computed tomography (CT) images in the Picture Archiving and Communication Systems (PACS) with liver nodule were included in the study, 37 of whom had histopathology results. Five radiologists who participated in the study, interpreted liver nodules independently on different PACS stations according to the LIRADS reporting system and its main parameters. Results: We determined that level of inter-observer agreement in the LR-1, LR-5, and LR-5V categories was higher than in the LR-2, LR-3, and LR-4 categories (κ = 0.522, 0.442, and 0.600 in the LR-1, LR-5, and LR-5V categories, respectively; κ = 0.082, 0.298, and 0.143 in the LR-2, LR-3, and LR-4 categories, respectively). The parameter that we observed to have the highest level of inter-observer agreement was venous thrombus (κ = 0.600). Conclusions: Our study showed that LIRADS achieves an acceptable inter-observer reproducibility in terms of clinical practice although it is insufficient at intermediate risk levels. We think that the prevalence of its use will be further increased with training related to the subject and the assignment of numerical values that express the probability of malignancy for each category and including the ancillary features in the algorithm according to clearer rules

Potential of cottonseed oil as fish oil replacer in European Sea Bass feed formulation

Triplicate groups of 20 European sea bass (35 g) were fed five diets in which the added lipid was 100% fish oil (FO), 40% (CSO40), 60% (CSO60), 80% (CSO80) and 100% (CSO100) refined cottonseed oil (CSO), for a period of 120 days. Overall fish growth, feed conversion ratio and protein utilization were unaffected by dietary treatment, but hepatosomatic and visceral fat indexes increased with increasing dietary CSO. Fillet fatty acid composition of total lipids reflected the fatty acids in the test diets. The monounsaturated fatty acids were significantly higher in fillet of fish fed diet FO, CSO40 and CSO60 compared to other treatments while saturated and polyunsaturated fatty acids (PUFA) were not affected by the dietary treatment. Some fatty acids (18:0, 18:1n-9, 20:5n-3 and 22:6n-3) were present in higher concentration in fillet lipid than in the CSO100 dietary lipid indicating accumulation in fillet relative to test diets. Retention of n-3 LC-PUFA within the fillet was increasingly inefficient among fish fed increasing levels of FO. Thus, this study suggests that CSO can be considered as a relatively effective substitute for fish oil in European sea bass (35 g) in terms of growth performances and feed efficiency as far as fish meal is present in the diet

Oral liken planus (OLP)’lu bireylerde kortizol, anksiyete ve depresyon düzeylerinin değerlendirilmesi

Oral liken planus (OLP)’lu bireylerde kortizol, anksiyete ve depresyon düzeylerinin değerlendirilmesi Amaç: Bu çalışmanın amacı; oral liken planus’lu bireylerde kortizol ve anksiyete/ depresyon düzeylerini değerlendirmek ve psikolojik faktörlerin oral liken planus (OLP)’un etyolojisindeki etkilerini saptamaktır. Yöntem: Marmara Üniversitesi Dişhekimliği Fakültesi Oral Diagnoz ve Radyoloji Anabilim Dalı Kliniği’ne başvuran, OLP klinik ön tanısı konmuş 30 birey hasta grubunu, sağlıklı 30 birey ise kontrol grubunu oluşturmuştur. OLP ön tanılı bireylerden kliniğimizde biyopsi materyali alınarak tanı histopatolojik olarak da desteklenmiştir. Hem çalışma hem de kontrol grubunun periferik kan kortizol düzeyleri değerlendirilmiş ve “Spielberger Durumluluk Kaygı Testi (DKT) – Süreklilik Kaygı Testi (SKT)” ile “Zung Depresyon Ölçeği (ZDP)” uygulanmıştır. Bulgular: Çalışma ve kontrol grubundaki hastaların kortizol, DKT ve ZDP değerleri ortalaması arasında anlamlı bir farklılık bulunmazken (p>0.05), çalışma grubunun SKT değerleri ortalaması kontrol grubundan istatistiksel olarak anlamlı düzeyde yüksektir (p<0.05). Sonuç: Oral Liken Planus’lu bireylerde süreklilik kaygı düzeyinin yüksek olması anksiyetenin bu hastalığın etyolojisinde önemli bir faktör olabileceğini ortaya koymaktadı