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Numerical investigation of seismic performance of high modulus columns under earthquake loading

Earthquake Engineering and Engineering Vibration 2019年第4期18卷 811-822页

作者： selcuk demir Pelin Ozener Abant Izzet Baysal University Bolu 14030 Turkey Yildiz Technical University Istanbul 34210 Turkey

This paper presents the result of two-dimensional fi nite element modeling studies in order to investigate the seismic behavior of high modulus columns in liquefi able soil. Particular attention was paid to the shear stress reduction mechanism of the high modulus columns and the shear strain distribution between soil and columns during earthquake motion. Numerical analyses were performed using a nonlinear elasto-plastic model in Plaxis 2016. The reliability of the numerical simulations was verifi ed through the results of a centrifuge test model designed to investigate the contribution of high modulus columns in liquefaction mitigation. The capability of numerical simulations was assessed primarily through comparison of predicted acceleration-time histories, pore water pressures, and displacements with the measured counterparts. The results of the numerical analysis showed that the presence of the columns did not reduce seismic shear stresses in the soil when compared to the unimproved soil condition and pure shear behavior between soil and column did not develop as expected in the current design methodology.

关键词： liquefaction high modulus column soil improvement UBC3D-PLM

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Microstructure,mechanical properties,and corrosion resistance of an explosively welded Mg-Al composite

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Journal of Magnesium and Alloys 2022年第4期10卷 1086-1095页

作者： Mustafa Acarer Bilge demir Burak Dikici Emin Salur Department of Metallurgical and Materials Engineering Technology FacultySelcuk UniversityKonya 42075Turkey Department of Mechanical Engineering Karabuk UniversityKarabuk 78100Turkey Department of Metallurgical and Materials Engineering Atatürk UniversityErzurum 25240Turkey

In this study,an attempt was made to manufacture an AZ31–Al5005 laminated composite by explosive welding.A mixture of ammonium nitrate(90%),fuel oil(5%),and TNT(5%)was used as the *** detonation velocity of the explosive material was approximately 3100 m•s^(−1).The microstructure and mechanical and corrosion properties of the joint were comparatively *** characterisation of the joint was conducted by optical microscopy(OM),scanning electron microscopy with energy-dispersive spectroscopy(SEM-EDS),high-resolution transmission electron microscopy(HR-TEM),and X-ray diffraction(XRD).The mechanical properties were determined using micro-Vickers hardness,tensile,and Charpy impact *** addition,electrochemical tests were conducted on the AZ31–Al5005 laminated composite and the individual components to determine their corrosion *** corrosion behaviours of the structures were determined in a 3.5%NaCl solution at room temperature using potentiodynamic scanning(PDS).The metallurgical structure and mechanical properties of the joints were within the acceptable limits.

关键词： corrosion welded Microstructure

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Frequency and safety of COVID-19 vaccination in children with multisystem inflammatory syndrome:a telephonic interview-based analysis

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World Journal of Pediatrics 2022年第10期18卷 700-705页

作者： Kubra Aykac Kubra Ozturk Osman Oguz demir Dilan demir Gumus Sevgi Aslan Ela Cem Miray Yilmaz Celebi Mustafa Dogan Karabacak Gulsum Alkan Fatma Dilsad Aksoy Burcu Ceylan Cura Yayla Eda Kepenekli Solmaz Celebi Melike Emiroglu Ilker Devrim Ali Bulent Cengiz Mehmet Ceyhan Yasemin Ozsurekci Faculty of Medicine Department of Pediatric Infectious DiseasesHacettepe UniversityAnkaraTurkey Goztepe Prof.Dr.Suleyman Department of Pediatric RheumatologyYalcın City HospitalIstanbulTurkey Faculty of Medicine Department of Pediatric DiseasesHacettepe UniversityAnkaraTurkey Department of Pediatric Infectious Diseases Marmara University School of MedicineIstanbulTurkey Department of Pediatric Infectious Diseases Dr.Behçet Uz Children’s HospitalízmirTurkey Faculty of Medicine Department of Pediatric Infectious DiseasesSelcuk UniversityKonyaTurkey Faculty of Medicine Department of Pediatric Infectious DiseasesUludag UniversityBursaTurkey Department of Pediatric Infectious Diseases University of Health Science Ankara Training and Research HospitalAnkaraTurkey

Coronavirus disease 2019(COVID-19)vaccines are currently approved or authorized to prevent serious outcomes,such as severe disease,hospitalization,and *** Pfizer-BioNTech vaccine is recommended for everyone aged five and older in the United States(US)to prevent severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection[1,2].However,it is unclear whether children with a history of multisystem,inflammatory syndrome in children(MIS-C)may be at risk for a MIS-like response following COVID-19 vaccination or SARS-CoV-2 reinfection[2].Therefore,physicians remain uncertain about vaccinating children with a history of *** study investigates the occurrence of severe,systemic side effects of COVID-19 vaccines and the recurrence of the MIS-C symptoms in children with a history of MIS-C to overcome vaccine hesitancy.

关键词： vaccination vaccine Pfizer

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1型糖尿病儿童及青少年患者血清瘦素和胰岛素样生长因子1水平与颈总动脉内中膜厚度和功能之间的相关性

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世界核心医学期刊文摘（儿科学分册） 2005年第3期1卷 10-11页

作者： Atabek M.E. Kurtoglu S. demir F. Baykara M. 李开 selcuk Universitesi Meram Tip F. Hastaliklari Anabilim Dali TR-42080 KonyaTurkey

研究背景和目的:研究显示,血清瘦素和胰岛素样生长因子1(IGF-1)水平可能参与动脉粥样硬化的发病机制。因此,本研究以1型糖尿病的儿童及青少年患者为对象,检测颈动脉内中膜厚度(IMT)及颈总动脉(CCA)功能与此两种血清成分的相关性。材料... 详细信息

研究背景和目的:研究显示,血清瘦素和胰岛素样生长因子1(IGF-1)水平可能参与动脉粥样硬化的发病机制。因此,本研究以1型糖尿病的儿童及青少年患者为对象,检测颈动脉内中膜厚度(IMT)及颈总动脉(CCA)功能与此两种血清成分的相关性。材料和方法: 测定45例糖尿病患儿(女性组23例,男性组22例),检测其血清内瘦素和IGF-1浓度。对比男女患儿的年龄、糖尿病病程和主要心血管发病风险因素。

关键词：内中膜厚度颈总动脉血清瘦素发病机制发病风险代谢指标舒张期心壁男性患儿人体测量学

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Efficacy of ankaferd blood stopper application on nonvariceal upper gastrointestinal bleeding

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World Journal of Gastrointestinal Endoscopy 2012年第12期4卷 556-560页

作者： Gokhan Gungor M Hakan Goktepe Murat Biyik Ilker Polat Tuncer Tuna Huseyin Ataseven Ali demir selcuk University Meram School of MedicineGastroenterology Department selcuk University Meram Faculty of Medicine Internal Medicine Konya selcuk University Meram Faculty of Medicine Gastroenterology

AIM:To prospectively assess the hemostatic efficacy of the endoscopic topical use of ankaferd blood stopper(ABS) in active non-variceal upper gastrointestinal system(GIS) ***:Endoscopy was performed on 220 patients under suspiciency of GIS *** with active non-variceal upper gastrointestinal bleeding(NVUGIB) with a spurting or oozing type were ***,8-10 cc of isotonic saline was sprayed to bleeding ***,8 cc of ABS was applied on lesions in which bleeding continued after isotonic saline *** other endoscopic therapeutic methods were applied on the lesions in which the bleeding did not stop after ***:Twenty-seven patients had an active NVUGIB with a spurting or oozing type and 193 patients were excluded from the study since they did not have non-variceal active bleeding.8 cc of ABS was sprayed on to the lesions of 26 patients whose bleeding continued after isotonic saline and in 19 of them,bleeding stopped after *** endoscopic treatment methods were applied to the remaining patients and the bleeding was stopped with these interventions in 6 of 7 ***:ABS is an effective method on NVUGIB,particularly on young patients with no *** may be considered as part of a combination treatment with other endoscopic methods.

关键词： Ankaferd blood stopper Non-variceal upper gastrointestinal bleeding Endoscopic treatment

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A candidate identification questionnaire for postmenopausal osteoporosis patients switched from daily or weekly bisphosphonate to once-monthly ibandronate: An open, prospective, multicenter study—BONCURE study

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Health 2013年第7期5卷 30-40页

作者： Yesim Gokce Kutsal Nurten Eskiyurt Jale Irdesel Vesile Sepici Hatice Ugurlu Yesim Kirazli Fusun Ardic Mirko Korsic Tonko Vlak Mane Grlickov Snezana Markovic Temelkova Miroslav Lazarov Nada Pilipovic Vera Popovic Aleksandar Dimic Branka Kovacev Dorina Ruci Argjend Tafaj Elma Kucukalic-Selimovic Dijana Avdic Hajrija Seleskovic Snjezana Pejicic Bulent Butun Gulseren Akyuz Lale Cerrahoglu Omer Faruk Sendur Peyman Yalcin Sema Oncel Merih Saridogan Tunay Sarpel Mehmet Tosun Kazim Senel Savas Gursoy Ferhan Canturk Huseyin demir Blazenka Miskic Dalibor Krpan Franjo Skreb Simeon Grazio Zeljka Crncevic-Orlic Fatih Ozdener Hakan Oncel Clinic for Orthopaedic Surgery Clinical Centre Vodnjansk Skopje Macedonia Clinic of Endocrinology Diabetes and Metabolic Disorders Skopje Macedonia Clinic of Rheumatology Clinical Centre Skopje Macedonia Clinical Center of Vojvodina Novi Sad Serbia Clinical Center Banja Luka Bosnia and Herzegovina Clinical Hospital Centre Split Croatia Department of PMR Cerrahpasa School of Medicine Istanbul University Istanbul Turkey Department of PMR Clinical Hospital Center Rijeka Rijeka Croatia Department of PMR Dr. Josip Bencevic General Hospital Slavonski Brod Croatia Department of PMR Istanbul School of Medicine Istanbul University Istanbul Turkey Department of PMR Polyclinic for Internal Medicine Zagreb Croatia Department of PMR School of Medicine Adnan Menderes University Aydin Turkey Department of PMR School of Medicine Akdeniz University Ankara Turkey Department of PMR School of Medicine Ankara University Ankara Turkey Department of PMR School of Medicine Ataturk University Erzurum Turkey Department of PMR School of Medicine Celal Bayar University Manisa Turkey Department of PMR School of Medicine Cukurova University Adana Turkey Department of PMR School of Medicine Dokuz Eylul University Izmir Turkey Department of PMR School of Medicine Ege University Izmir Turkey Department of PMR School of Medicine Erciyes University Kayseri Turkey Department of PMR School of Medicine Gazi University Ankara Turkey Department of PMR School of Medicine Gaziantep University Gaziantep Turkey Department of PMR School of Medicine Hacettepe University Ankara Turkey Department of PMR School of Medicine Karadeniz Technical University Trabzon Turkey Department of PMR School of Medicine Marmara University Istanbul Turkey Department of PMR School of Medicine Ondokuz Mayis University Samsun Turkey Department of PMR School of Medicine Pamukkale University Denizli Turkey Department of PMR School of Medicine Selcuk University Konya Turkey Department

A candidate identification questionnaire (CIQ) was tested to determine its predictive value for patient-reported satisfaction in patients switched from once-weekly or once-daily treatment with a bisphosphonate to once-monthly dosing. This was a prospective, open-label, multicenter international study in patients with postmenopausal osteoporosis who had been receiving once-daily or once-weekly alendronate or risendronate for at least 3 months. Patients completed a CIQ, then commenced 150 mg monthly ibandronate for 6 months. Patients completed the Osteoporosis Patient Satisfaction Questionnaire (OPSAT-QTM) at baseline for 6 months. Scores were converted to composite satisfaction scores (CSS, scale 0-100). Totally 677 patients completed a CIQ, 645 were enrolled in the treatment phase and comprised the intent-to-treat (ITT) population, and 630 completed the study. In the ITT population, 68.1% patients answered “yes” to one or more CIQ questions. OPSAT-Q scores increased for the convenience, quality of life and overall satisfaction domains (p scores for the side effects domains were significant (p < 0.001) in the CIQ “yes” group, but not for the degree of bother (decrease in mean of 0.1 points, p = 0.50) or duration (no change, p = 0.84) of non-gastrointestinal side effects. Of 638 patients who completed the preference questionnaire, 93.0% of patients preferred the once-monthly dosing schedule and 563 patients (90.7%) found it more convenient. The most common adverse events were dyspepsia (1.9%), nausea (1.1%), and upper abdominal pain (0.9%). Patients are likely to prefer treatment with monthly ibandronate to a weekly or monthly bisphosphonate irrespective of their stated preference before switching treatment.

关键词： Bisphosphonate Compliance Ibandronate Postmenopausal Osteoporosis

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