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The efficiency of direct integration methods in elastic contact-impact problems

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Acta Mechanica Sinica 2005年第4期21卷 395-401页

作者： Ibrahim H.Guzelbey Ahmet Erklig bahattin kanber University of Gaziantep Mechanical Engineering DepartmentGaziantep-Turkey

A comparison of direct integration methods is madeand their efficiency is investigated for impact ***-mark,Wilson-θ,Central Difference and Houbolt Methodsare used as direct integration *** analysisincludes that of elastic and large deformation based uponupdated Lagrangian including buckling *** resultsshow that the direct integration methods give differentresults in different contact-impact cases.

关键词： Elastic impact,Direct integration methods,Finite strain Contact

Customized scaffolds for large bone defects using 3D‑printed modular blocks from 2D‑medical images

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Bio-Design and Manufacturing 2024年第1期7卷 74-87页

作者： Anil AAcar Evangelos Daskalakis Paulo Bartolo Andrew Weightman Glen Cooper Gordon Blunn bahattin Koc Faculty of Engineering and Natural Sciences Sabanci UniversityIstanbul 34956Türkiye D Bioprinting Laboratory Sabanci University Nanotechnology Research and Application CenterIstanbul 34956Türkiye School of Mechanical Aerospace and Civil EngineeringManchester Institute of BiotechnologyUniversity of ManchesterManchester M139PLUK Singapore Centre for 3D Printing School of Mechanical and Aerospace EngineeringNanyang Technological UniversitySingapore 639798Singapore School of Pharmacy and Biomedical Sciences University of PortsmouthPortsmouth PO12UPUK

Additive manufacturing(AM)has revolutionized the design and manufacturing of patient-specific,three-dimensional(3D),complex porous structures known as scaffolds for tissue engineering *** use of advanced image acquisition techniques,image processing,and computer-aided design methods has enabled the precise design and additive manufacturing of anatomically correct and patient-specific implants and ***,these sophisticated techniques can be timeconsuming,labor-intensive,and ***,the necessary imaging and manufacturing equipment may not be readily available when urgent treatment is needed for trauma *** this study,a novel design and AM methods are proposed for the development of modular and customizable scaffold blocks that can be adapted to fit the bone defect area of a *** modular scaffold blocks can be combined to quickly form any patient-specific scaffold directly from two-dimensional(2D)medical images when the surgeon lacks access to a 3D printer or cannot wait for lengthy 3D imaging,modeling,and 3D printing during *** proposed method begins with developing a bone surface-modeling algorithm that reconstructs a model of the patient’s bone from 2D medical image measurements without the need for expensive 3D medical imaging or *** algorithm can generate both patient-specific and average bone ***,a biomimetic continuous path planning method is developed for the additive manufacturing of scaffolds,allowing porous scaffold blocks with the desired biomechanical properties to be manufactured directly from 2D data or *** algorithms are implemented,and the designed scaffold blocks are 3D printed using an extrusion-based AM *** and instructions are also provided to assist surgeons in assembling scaffold blocks for the self-repair of patient-specific large bone defects.

关键词： Additive manufacturing Modular scaffolds Large bone defect Customized scaffold design Patient-specific scaffolds

Synthesis, Spectroscopic and Electrochemical Investigations of Two vic-Dioximes and Their Mononuclear Ni（Ⅱ）, Cu（Ⅱ） and Co（Ⅱ） Metal Complexes Containing Morpholine Group

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Chinese Journal of Chemistry 2006年第11期24卷 1599-1604页

作者： KILIC, Ahmet TAS, Esref GUMGUM, bahattin YILMAZ, Ismail Department of Chemistry Harran University Sanliurfa 63510 Turkey Department of Chemistry Dicle University Diyarbakir 21280 Turkey Department of Chemistry Technical University oflstanbul Istanbul Maslak 34469 Turkey

Two vic-dioxime ligands （LxH2） containing morpholine group have been synthesized from 4-[2-（dimethylaminoethyl）] morpholine with anti-phenylchloroglyoxime or anti-monochloroglyoxime in absolute THF at -15 ℃. Reaction of two vic-dioxime ligands with MCl2·nH2O （M： Ni, Cu or Co and n=2 or 6） salts in 1 ： 2 molar ratio afforded metal complexes of type [M（LxH）2] or [M（LxH）2·2H2O]. All of metal complexes are non-electrolytes as shown by their molar conductivities （Am） in DMF （dimethyl formamide） at 10^-3 mol·L^-1. Structures of the ligands and metal complexes have been solved by elemental analyses, FT-IR, UV-Vis, ^1H NMR and ^13C NMR, magnetic susceptibility measurements, molar conductivity measurements. Furthermore, redox properties of the metal complexes were investigated by cyclic voltammetry.

关键词： morpholine electrochemistry dioxime structure metal complex cyclic voltammetry

Fatigue Life Prediction of Solder Joints in Electronic Packages with Ansys® 1

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Total estimated effective doses from radiologic imaging modalities of children with cancer:a single center experience

丛书名： The Springer International Series in Engineering and Computer Science

2003年

作者： Erdogan Madenci Ibrahim Guven bahattin Kilic

ISBN: (数字)9781461502555

ISBN: (纸本)9781402073304;9781461349891

describes the method in great detail starting from the theoretical basis. The reader is supplied with an add-on software package to ANSYS® that is designed for solder joint fatigue reliability analysis of electronic packages. Specific steps of the analysis method are discussed through examples without leaving any room for confusion. The add-on package along with the examples make it possible for an engineer with a working knowledge of ANSYS® to perform solder joint reliability analysis.;allows the engineers to conduct fatigue reliability analysis of solder joints in electronic packages.

关键词： Machines, Tools, Processes Optical Materials Electrical and Electronic Engineering

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World Journal of Pediatrics 2017年第3期13卷 242-247页

作者： Derya Ozyorük Suna Emir HacιAhmet Demir Gülsah Bayram Kabacam bahattin Tunc Division of Pediatric Oncology Ankara Children's Hematology and Oncology Education and Research HospitalAnkaraTurkey Division of Radiology Ankara Children's Hematology and Oncology Education and Research HospitalAnkaraTurkey

Background:Recently,awareness of the cumulative radiation exposure for pediatric oncology patients has been increasing,together with increased survival rates and longer life *** aim of our study was to quantify the amount of ionising radiation from imaging modalities of pediatric oncology ***:Eighty-eight patients who were diagnosed with childhood cancer and followed up for 5 years between 2004-2014 in our center were included in the ***' medical files were reviewed retrospectively for imaging history in the first 5 years after *** estimated effective doses from radiologic imaging modalities were ***,the basic demographic data,histologic type,stage,and outcomes of disease were collected for all ***:The individual total estimated effective doses ranged from 8.73 to 167 mSv,with a median of 62.92 *** tomography was the greatest contributor of total effective *** doses ranged 21.45-113.20 mSv (median:62.92 mSv) in Hodgkin lymphoma,12.53-167.10 mSv (median:52 mSv) in non-Hodgkin lymphoma,4.13-172.98 mSv (median:52 mSv) in neuroblastoma,31-149.89 mSv (median:63.10 mSv) in Wilms' tumor,11.50-73.72 mSv (median:36.90 mSv) in germ cell tumor,26.46-125.86 mSv (median:80.90 mSv) in other solid tumor and 0.02-13.31 mSv (5.25 mSv) in brain tumor ***-two children (25%) died with progressive disease during the 5-year follow-up ***:Similar to previous studies,the total estimated effective doses in children with cancer have been found various according to diagnosis,stage and clinical *** clarify the harmfull effects of radiation burden,prospective studies should be conducted in children with cancer.

关键词： children effective dose ionizing radiation

Turkish Van Cat and Turkish Angora Cat： A Review

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Journal of Agricultural Science and Technology(A) 2017年第3期7卷 151-159页

作者： bahattin Cak Department of Animal Science Faculty of Veterinary Science University of Yuzuncu Yil 65080 Van Turkey

Turkish Van and Angora cats are one of most important genetic resources in Turkey. The study aimed to evaluate some morphological properties and also behavioural characteristics in both Turkish Van and Angora cats. This research used both literature and the records from the Van Cat Home at Van Cats Research Centre of Yuzuncu Yil University for Turkish Van cats, as well as literature information for Turkish Angora cat. Van cats which have a special place among world cat races have gained appreciation of people with their original eye colors, long white hair and affectionate attitudes. Origin of Turkish Angora cat breeding in Turkey is Ankara province. Angora cat is strong, energetic, kind, known as a moderately long silky haired cat. According to the results of this study and literature, withers height and body length of Turkish Van cat are higher than the Turkish Angora cat, while tale length and breast girth of Turkish Angora cat are higher than the Turkish Van cat. Body weight （g） of female Turkish Angora cat is heavier than the Turkish Van cat, but male Turkish Van cat is heavier than Turkish Angora cat.

关键词： Turkish Van cat Turkish Angora cat morphological traits.

Short term protective effect of digitoxin in sepsis-induced acute lung injury

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BIOCELL 2022年第2期46卷 433-439页

作者： EJDER SAYLAV BORA MÜMIN ALPER ERDOĞAN bahattinÖZKUL İBRAHIM HALIL SEVER İBRAHIM SÖĞÜT CANAN HÜRDAĞ OYTUN ERBAŞ İzmir Atatürk Research and Training Hospital Emergency Medicine IzmirTurkey Department of Physiology İzmir KatipÇelebi UniversityIzmirTurkey Department of Radiology Istanbul Atlas UniversityIstanbulTurkey Department of Radiology Demiroğlu Bilim UniversityIstanbulTurkey Department of Biochemistry Demiroğlu Bilim UniversityIstanbulTurkey Department of Histology and Embryology Demiroğlu Bilim UniversityIstanbulTurkey Department of Physiology Demiroğlu Bilim UniversityIstanbulTurkey

Purpose:Digitoxin is a cardiac glycoside used in the treatment of heart *** by its known antiinflammatory effect,this study aims to investigate the effect of digoxin in a sepsis model and to bring to light its effect and underlying mechanism in acute lung injury(ALI).Method:28 wistar albino rats were divided into 4 *** model is performed by the feces intraperitoneal-injection procedure(FIP).Results:TNF-a,CRP,IL-6,IL 1-Beta,lactic acid,and MDA values were significantly decreased in the FIP+digitoxin group compared to the FIP+Saline *** the same groups were examined,histological improvements such as decrease in alveolar inflammation and decrease in septal thickening in the digitoxin group and thorax CT were found to be significantly higher in the Hounsfield unit digitoxin group compared to the Saline ***:Digitoxin has shown biochemical improvement in sepsis with all known mechanisms of action,and healing effects in both computerized tomography and histology in the lung.

关键词： Digitoxin Animal model Sepsis Acute lung injury

Gallbladder function and dynamics of bile flow in asymptomatic gallstone disease

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World Journal of Gastroenterology 2009年第22期15卷 2763-2767页

作者： Sevim Süreyya eri Feride Meltem zbek Celal eri bahattin Baykal Hasan Erol Eroglu Zeynep Baykal Mustafa Yildiz Semahat Saglam Ahmet Yesildag Nuclear Medicine University of Suleyman Demirel Hospital General Surgery University of Suleyman Demirel Hospital Radiology University of Suleyman Demirel Hospital Internal Medicine State Hospital Isparta

AIM： To investigate the effects of gallbladder stones on motor functions of the gallbladder and the dynamics of bile flow in asymptomatic gallstone disease. METHODS： Quantitative hepatobiliary scintigraphy was performed to detect the parameters of gallbladder motor function [gallbladder ejection fraction （GBEF）, gallbladder visualization time （GBVT）, gallbladder time to peak activity （GBTmax）, gallbladder half emptying time （GBT1/2）, and transit time of bile to duodenum （TTBD）] in 24 patients with asymptomatic cholelithiasis who were diagnosed incidentally during routine abdominal ultrasonographic examination and 20 healthy subjects with normal gallbladder. RESULTS： Even though there was no significant difference in the clinical and laboratory parameters between the patient and control groups, all parameters of gallbladder function except TTBD were found to differ significantly between the two groups. GBEF in the patient group was decreased （P = 0.000） and GBVT, GBT GBT1/2 in the patient group were longer （P = 0.000, P = 0.015, P = 0.001, respectively）.there were not any clinical and laboratory findings, gallbladder filling and emptying could be impaired in patients with gallstone disease.

关键词： Asymptomatic gallstone disease Hepatobiliary scintigraphy Gallbladder function

Manganese-Doped Calcium Silicate Nanowire Composite Hydrogels for Melanoma Treatment and Wound Healing

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Research 2021年第1期2021卷 789-800页

作者： Zhongcao Wu Hui Zhuang Bing Ma Yin Xiao bahattin Koc Yufang Zhu Chengtie Wu State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Institute of Health and Biomedical Innovation Queensland University of Technology7 Brisbane 4059Australia Integrated Manufacturing Technologies Research and Application Center Sabanci UniversityTuzla 34956 IstanbulTurkey SUNUM Nanotechnology Research Center Sabanci UniversityTuzla 34956 IstanbulTurkey Faculty of Engineering and Natural Sciences Sabanci UniversityTuzla 34956 IstanbulTurkey

Melanoma is a serious malignant skin *** eliminating melanoma and healing after-surgical wounds are always challenges in clinical *** address these problems,we propose manganese-doped calcium silicate nanowire-incorporated alginate hydrogels(named MCSA hydrogels)for in situ photothermal ablation of melanoma followed by the wound healing *** proposed MCSA hydrogel had controllable gelation properties,reasonable strength,and excellent bioactivity due to the incorporated calcium silicate nanowires as the in situ cross-linking agents and bioactive *** doping of manganese into calcium silicate nanowires gave them excellent photothermal effects for eradicating melanoma effectively under near infrared(NIR)***,the synergistic effect of manganese and silicon in the MCSA hydrogel effectively promotes migration and proliferation of vascular endothelial cells and promotes ***,such bifunctional bioactive hydrogels could achieve combined functions of photothermal therapy and wound healing,showing great promise for melanoma therapy and tissue regeneration.

关键词： healing wound manganese