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Steady State Heat Transfer of Ladle Furnace During Steel Production Process

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Journal of Iron and Steel Research International 2006年第3期13卷 18-20,25页

作者： unal Camdali murat.Tun Development Bank of Turkey Ankara 06100Turkey Engineering Faculty Yeditepe UniversityIstanbul 81120 KayιsdagιTurkey

The heat transfer analysis was performed for an industrial ladle furnace （LF） with a capacity of 55-57 t in Turkey. The heat losses by conduction, convection and radiation from outer and bottom surfaces, top and ele... 详细信息

关键词： heat transfer ladle furnace refining liquid steel

Evaluation of periglacial landforms and formation of soil properties on the Mount Honaz,SW Türkiye

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Journal of Mountain Science 2024年第9期21卷 3047-3067页

作者： SERİN Soner UNCU Levent DEDE volkan TÜRKEŞmurat Institute of Social Sciences İstanbul Universityİstanbul 34119Türkiye Department of Geography BilecikŞeyh Edebali UniversityBilecik 11234Türkiye Department of Geography Ardahan UniversityArdahan 75002Türkiye Center for Climate Change and Policy Studies Boğaziçi Universityİstanbul 34342Türkiye

The main aim of this study is to explain periglacial processes on the summits of Mount Honaz(2571 m a.s.l.),define periglacial landforms,and determine the relationships between morphometric features and topographic *** circles,stony earth circles,non sorted steps,and non sorted stripes were identified on the summits of Mount ***'s correlation coefficient(r)and linear regression analyses were performed by taking metric measurements from 125 periglacial landforms to describe their morphometric features(length,width,height)of periglacial landforms and explain the relationships between them and topographic factors(elevation,slope).To explain the relationships between periglacial landforms and soil properties,soil samples from 11 periglacial landforms were taken and *** landforms,which continue to develop on the summits of Mount Honaz today,have been evaluated with present climate *** of soil samples indicates a notable impact of parent material on the genesis of periglacial *** high ratio of organic matter in mud circle and non sorted step landforms and the high lime ratio in stony earth circle landforms prove a strong relationship between the formation mechanisms of landforms and the soil ***,it is consistent with the findings obtained from the analysis that severe periglacial processes and washing and scavenging events are experienced more on the northern slopes.

关键词： Periglacial processes and geomorphology Soil analysis Morphometric analysis Mount Honaz Türkiye

Clinical significance of low transaminase levels in children with inflammatory bowel disease

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World Journal of Pediatrics 2019年第2期15卷 143-147页

作者： murat Cakir Elif Sag Guzide Dogan Fatih unal Erhun Kasirga Department of Pediatric Gastroenterology Hepatology and Nutrition Faculty of MedicineKaradeniz Technical UniversityTrabzonTurkey Department of Pediatric Gastroenterology Hepatology and Nutrition Faculty of MedicineManisa Celal Bayar UniversityManisaTurkey Department of Pediatric Gastroenterology Hepatology and Nutrition BursaTurkey

Background Low alanine aminotransaminase (LALT) levels may be seen in patients with inflammatory bowel disease (IBD),but there has been no study about the frequency and its clinical *** aimed to analyze the frequency of LALT,and its clinical significance in children with *** The study included the 89 patients with IBD without hepatobiliary *** was defined as ALT levels < 5 U/*** and clinical findings and outcome of the patients with and without LALT were *** LALT was found 47.1% of the *** initial examination,it was more common in female patients (92.3 vs.41.3%,P < 0.001) and patients with CD (57.7 vs.30.2%,P=0.01).75% of the patients with penetrating Crohn's disease (CD) had LALT (P=0.002).Hemoglobin (10.4±2.1 vs.11.7± 1.9 g/dL,P=0.01),folic acid (5.2±3.3 vs.8.6±5.9 ng/mL,P =0.02) and serum albumin levels (3.6 ± 0.8 vs.4.7 ± 5 g/dL,P =0.002) were significantly low in patients with *** was associted with the disease relapse within 2 weeks in 12 of the 16 patients with LALT whereas it was seen in 16 of the 73 patients without LALT during the follow-up (75 vs.21.9%,P < 0.001).Additionally,steroid dependency was more common in patients with LALT during the follow-up (62.5 vs.12.3%,P<0.001).Conclusions LALT is common in children with IBD especially in CD and associated with low hemoglobin,albumin and folic acid *** may be a marker of relapse and steroid dependency.

关键词： Children Inflammatory bowel disease Low transaminase levels Vitamin B6

Isotherm,kinetic and thermodynamic investigations of boron phosphide to remove methylene blue from aqueous solution

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Journal of Central South University 2024年第9期31卷 3034-3049页

作者： YILDIRIM Furkan murat ISIK Birol UGRASKAN volkan Department of Chemistry Faculty of Arts&SciencesYildiz Technical UniversityEsenlerIstanbul 34220Turkey

In this work,the boron phosphide(BP)was synthesized and used for the adsorptive removal of methylene blue(MB)dye from aqueous *** determine the optimum adsorption conditions,studies were performed by varying parameters of temperature(298–328 K),pH(2–12),contact time(0–120 min),adsorbent dose(0.01–0.20 g/50 mL),and dye concentration(10–50 mg/L).Different isotherm and kinetic models were applied to the adsorption *** linear correlations coefficient showed that the Langmuir isotherm best fits(R^(2)=0.9996).The maximum adsorption capacity of BP was obtained as 555.56 mg/g at 55℃and the removal rate reached up to 84.11%.Additionally,the pseudo-second-order kinetic model described the adsorption process best(R^(2)=0.9998).The thermodynamic studies represented that the adsorption occurred spontaneously(ΔG_(A)^(Θ)=−24.90 kJ/mol)and endothermically(ΔH_(A)^(Θ)=16.67 kJ/mol).The results showed that BP is an efficient adsorbent for removing cationic dyes from aqueous solutions.

关键词： adsorption boron phosphide methylene blue

Capturing Plateau-Rayleigh instability in silver nanowires via ultrafast electron microscopy

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Nano Research 2024年第9期17卷 8402-8407页

作者： Shuai Jiang volkan Ortalan Department of Materials Science and Engineering University of ConnecticutStorrsCT 06269USA

Understanding the structural stability of nanomaterials such as nanowires is imperative for their practical ***,using single-shot ultrafast transmission electron microscopy,we captured the Plateau-Rayleigh instability behavior of silver nanowires decomposing into silver nanoparticles upon laser irradiation on nanosecond time *** found that this dynamic process can be accelerated by a factor of 10 through increasing the peak laser fluence from 6.03 to 14.60 mJ/cm^(2).Moreover,by comparing the laser fluence required to initiate the Plateau-Rayleigh instability in silver nanowires on carbon and Formvar membranes,it was found that the main driving force for the Plateau-Rayleigh instability in this study was substrate *** element analysis and molecular dynamics simulations are also applied to estimate the temperature jump of the nanowires and atomistic behavior,*** addition,the complex motions of silver nanowires under laser irradiation were systematically investigated by combining the results of ultrafast transmission electron microscopy with scanning electron microscopy characterizations and were determined to be related to nanowire-membrane interactions or pre-existing stresses on the nanowires,which in turn demonstrated the potential of ultrafast transmission electron microscopy for the characterization of nanomaterials and devices under extreme conditions.

关键词： silver nanowire Plateau-Rayleigh instability ultrafast transmission electron microscopy molecular dynamics simulation

Effects of intraocular rifampicin on retinal ganglion cell structure:a stereological and histopathological study

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 596-599页

作者： zgür Cakici Selina Aksak Deniz unal Sare Sipal Sadullah Keles Talha Dumlu murat Karamese Department of Ophthalmology Erzurum Research and Education Hospital Department of Cytology and Histology Faculty of MedicineAtaturk University Department of Pathology Faculty of SciencesAtaturk University Department of Ophthalmology Faculty of MedicineAtaturk University Department of Chest Diseases Horasan Government Hospital Department of Microbiology Faculty of MedicineAtaturk University

AIM:To determine the histopathological changes of rifampicin applied intravitreally on retinal ganglion cells by means of stereological and histopathological ***:For this study twenty-four New Zealand adult rabbits were divided into four groups(n=6 for each group).50μg/0.1mL(group 1),100μg/0.1mL(group 2),150μg/0.1mL(group 3) and 200μg/0.1mL(group 4),rifampicin were injected into the vitreous of the right eyes of animals,their left eyes were used as control(group 5).After the 28thday of application,animals were anesthetised with xylazine(8mg/kg,IM) and then their eyes were enucleated *** were taken away and eyes were prepared for both stereological and electromicroscopic ***:Depending on the high dose of rifampicin,some histopathological changes such as cytoplasmic dilatation and damaged membrane were observed on the electromicroscopic *** quantitative examination,which was done at the light microscopic level,it was shown that the number of neurons decreased linearly as rifampicin dose increased when compared with the control ***:Based on these findings,low-dose rifampicin(50μg/0.1mL) may be useful for treatment of the ocular diseases.

关键词： rifampicin stereology histopathology ganglion cells

Human Gait Recognition Based on Kernel PCA Using Projections

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Journal of Computer Science & Technology 2007年第6期22卷 867-876页

作者： murat Ekinci murat Aykut Computer Vision Lab Department of Computer EngineeringKaradeniz Technical University61080 TrabzonTurkey

This paper presents a novel approach for human identification at a distance using gait recognition. Recognition of a person from their gait is a biometric of increasing interest. The proposed work introduces a nonlinear machine learning method, kernel Principal Component Analysis （PCA）, to extract gait features from silhouettes for individual recognition. Binarized silhouette of a motion object is first represented by four 1-D signals which are the basic image features called the distance vectors. Fourier transform is performed to achieve translation invariant for the gait patterns accumulated from silhouette sequences which are extracted from different circumstances. Kernel PCA is then used to extract higher order relations among the gait patterns for future recognition. A fusion strategy is finally executed to produce a final decision. The experiments are carried out on the CMU and the USF gait databases and presented based on the different training gait cycles.

关键词： biometrics gait recognition gait representation kernel PCA pattern recognition

Palmprint Recognition by Applying Wavelet-Based Kernel PCA

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Journal of Computer Science & Technology 2008年第5期23卷 851-861页

作者： murat Ekinci murat Aykut Computer Vision Lab Department of Computer Engineering Karadeniz Technical University

This paper presents a wavelet-based kernel Principal Component Analysis （PCA） method by integrating the Daubechies wavelet representation of palm images and the kernel PCA method for palmprint recognition. Kernel PCA is a technique for nonlinear dimension reduction of data with an underlying nonlinear spatial structure. The intensity values of the palmprint image are first normalized by using mean and standard deviation. The palmprint is then transformed into the wavelet domain to decompose palm images and the lowest resolution subband coefficients are chosen for palm representation. The kernel PCA method is then applied to extract non-linear features from the subband coefficients. Finally, similarity measurement is accomplished by using weighted Euclidean linear distance-based nearest neighbor classifier. Experimental results on PolyU Palmprint Databases demonstrate that the proposed approach achieves highly competitive performance with respect to the published palmprint recognition approaches.

关键词： palmprint recognition kernel PCA wavelet transform biometrics pattern recognition

Aluminum Toxicity:A Case Study on Tobacco(Nicotiana tabacum L.)

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Phyton-International Journal of Experimental Botany 2023年第1期92卷 165-192页

作者： Munir Ozturk Mert Metin volkan Altay Tomonori Kawano Alvina Gul Bengu Turkyilmaz unal Dilek unal Rouf Ahmad Bhat Moonisa Aslam Dervash Kristina Toderich Esra Koc Pedro Garcia Caparros Andleeb Shahzadi Department of Botany and Centre for Environmental Studies Ege UniversityIzmir35100Turkiye Graduate School of Environmental Engineering The University of KitakyushuFukuoka808-0135Japan Department of Biology Faculty of Science and ArtsHatay Mustafa Kemal UniversityHatay31060Turkiye Atta-ur-Rahman School of Applied Biosciences National University of Sciences&TechnologyIslamabad44000Pakistan Department of Biotechnology Faculty of Science and ArtsNigde Omer Halisdemir UniversityNigde51240Turkiye Department of Molecular Biology and Genetics Faculty of Science and ArtsUniversity of Bilecik Seyh EdebaliBilecik11230Turkiye Department of Environmental Science Sri Pratap CollegeCluster University SrinagarKashmir190008India Division of Environmental Sciences Sher-e-Kashmir University of Agricultural Sciences and TechnologyKashmir190025India International Platform for Dryland Research and Education Tottori UniversityTottori680-0001Japan Department of Biology Faculty of ScienceAnkara UniversityAnkara06100Turkiye Department of Superior School Engineering University of AlmeríaAlmería04120Spain Department of Medical Pharmacology Cerrahpasa Medicine FacultyIstanbul University-CerrahpasaIstanbul34096Turkiye

Aluminum is an abundant metal in the earth’s crust that turns out to be toxic in acidic *** plants are affected by the presence of aluminum at the whole plant level,at the organ level,and at the cellular *** as a cash crop(Nicotiana tabacum L.)is a widely cultivated plant worldwide and is also a good model organism for *** there are many articles on Al-phytotoxicity in the literature,reviews on a single species that are economically and scientifically important are *** this article,we not only provide the biology associated with tobacco Al-toxicity,but also some essential information regarding the effects of this metal on other plant species(even animals).This review provides information on aluminum localization and uptake process by different staining techniques,as well as the effects of its toxicity at different compartment levels and the physiological consequences derived from *** addition,molecular studies in recent years have reported specific responses to Al toxicity,such as overexpression of various protective ***,this review discusses data on various organelle-based responses,cell death,and other mechanisms,data on tobacco plants and other kingdoms relevant to these studies.

关键词： Aluminum oxidative stress protective proteins ROS tobacco toxicity