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1A review:Past,present and future of grain refining of magnesium castings显示文摘Magnesium is the lightest constructional metal,which makes it an important material for different applications like automotive,transportation,aviation and aerospace.There are several studies about developing properties of existing Mg alloys and introducing new alloy systems to industrial producers.An important way to improve properties of metallic materials is to decrease grain size that results almost in increasing all kind of properties of the material.This review paper aims to summarize the literature about grain refining of magnesium alloys.The text is consisting of three sections,which focused on the(1)grain refining methods used in the past,which are not used today,(2)grain refining methods currently being used in the industry and(3)novel and newly developed methods that may find usage in the industry in future.Before explaining grain refining methods of magnesium alloys a general summary about grain refinement of metals is also provided.Erdem Karakulak 2019Journal of Magnesium and Alloys2019,7,3:22
2铜添加对近共晶Al-Si-xCu合金的微观组织和硬度的影响(英文)显示文摘研究铜含量对Al-Si-xCu(x=2%,3%,4%and5%)合金的微观组织和硬度的影响。不同铜含量的铝合金经熔炼后于690°C铸造成湿砂模并固化,于500°C保温7h进行固溶处理后对样品进行水冷。随后于190°C进行时效处理,分别保温5,10和15h,研究时效时间对基体硬度的影响。采用差热分析法,在冷却速度30K/min下确定平衡相的转变温度,并研究铜含量对四元共晶合金的形成和α(Al)+Si熔点的影响。结果表明,随着铜含量的增加,发生析出硬化从而导致基体硬度增加,α(Al)+Si的熔点降低,共晶相的含量增加。当铜含量超过2%时,生成熔点为507°C的四元共晶相。MUZAFFER ZEREN ERDEM KARAKULAK SERAP GüMü 2011Transactions of Nonferrous Metals Society of China2011,21,8:8
3Intraoperative acidosis is a new predictor for postoperative pancreatic fistula after pancreaticoduodenectomy显示文摘BACKGROUND:Early diagnosis of postoperative pancreatic fistula(POPF) is important for proper interventions.The preoperative,intraoperative and early postoperative biochemical markers have predictive value of POPF.The present study was to evaluate several simple biochemical parameters in the prediction of POPF.METHODS:Patients who underwent pancreaticoduodenectomy in our center between 2006 and 2015 were reviewed retrospectively.Preoperative and early postoperative biochemical parameters were evaluated.Additionally,the relationship between POPF and p H and lactate level at the end of surgery were analyzed,and neutrophil-to-lymphocyte ratio(NLR),plateletto-lymphocyte ratio(PLR),and red cell distribution widthto-platelet ratio(RPR) were calculated for postoperative days(PODs) 1 and 3.Diagnosis and grading of POPF were performed according to the standards of the International Study Group on Pancreatic Fistula.The patients were divided into two groups:Group 1 with no fistula or grade-A fistula; group 2 with grade-B or-C fistula.These simple biochemical markers were then compared between the two groups.RESULTS:Serum amylase level was significantly higher at POD3,and p H level was significantly lower at the end of operation in group 2 compared with those in group 1.However,the serum amylase was below the upper limit of normal serum level and therefore,the difference was not significant in clinical practice.Receiver operating charecteristic curve analysis showed that p H level was a reliable predictor of POPF(area under the curve:0.713; 95% CI:0.573-0.853).CONCLUSIONS:A low p H level at the end of pancreaticoduodenectomy was a risk factor of POPF.NLR,PLR,and RPR had no predictive value of POPF after pancreaticoduodenectomy.Erdem Kinaci Mert Mahsuni Sevinc Abdulkerim Ozakay Savas Bayrak Ekrem Cakar Serkan Sari 2016Hepatobiliary & Pancreatic Diseases International2016,15,3:7
4Tribological Properties of CrN Coated H13 Grade Tool Steel显示文摘The characteristics of CrN coated martensitic H13 grade tool steels were studied.CrN coatings were deposited by the arc physical vapor deposition(PVD)before and after the pulse plasma nitriding of the samples.The PVD and plasma nitriding techniques were applied in relevant workshops by following the commercial practice parameters.Experimental results showed that CrN coating deposited on the nitrided surfaces exhibited superior scratch and wear resistances as compared to that deposited on the original martensitic surface.Erdem Atar zgür Alpaslan zgür elik Hüseyin imenoglu 2014Journal of Iron and Steel Research(International)2014,21,2:5
5Robotic radical prostatectomy in high-risk prostate -ancer: current perspectives显示文摘Abdullah Erdem Canda Mevlana Derya Balbay 2015Asian Journal of Andrology2015,17,6:5
6Hepatic cystic echinococcosis:Percutaneous treatment as an outpatient procedure显示文摘Objective:To demonstrate utility and safety of the puncture aspiration injection and reospiration(PAIR)technique for outpatients.Methods:Percutaneous treatment with US guidance was applied to 33 patients for 44 cysts.Patients treated with the PAIR technique,were outpatients.PAIR and catheterization technique were evaluated for efficacy and safety of procedure and complication rates.Results:Thirty-five of 44 cysts were treated with the PAIR and 9 of 44 were treated with the catheterization technique.The success rate of the cysts Gharbi type 1(CEI)and type 2(Ct3a)treated with the PAIR technique was 1009.hi the follow up of 9 cysts treated with the catheterization technique,2 of them(22%)developed cyst infection and 1(11%)developed a biliary fistula.Conclusions:The PAIR technique was found to be an effective and safe approach in order to treat Gharbi type 1 and type 2 cysts percutaneously for outpatients.It has a very low complication rate in comparison with the catheterization technique.So every effort should be mode to finish the treatment with PAIR technique.Mert Kroglu Bekir Erol Cemil Gürses Baris Türkbey Cem Yunus Bas Ahmet Sükrü Alparslan Banu Kale Kroglu Iclal Erdem Toslak Bülent eki Okan Akhan 2014Asian Pacific Journal of Tropical Medicine2014,7,3:4
7Association between Helicobacter pylori and liver-to-spleen ratio: a randomized-controlled single-blind study显示文摘Zeynal Do?an Levent Filik Bilal Ergül Murat Sarikaya Erdem Akbal 2013European Journal of Gastroenterology & Hepatology2013,,1:3
8A Model Predictive Control for Microgrids Considering Battery Aging显示文摘The increasing number of distributed energy resources(DERs),advancing communication and computation technologies,and reliability concerns of the customers have caused an intense interest in the concept of microgrid.Although DERs are the biggest motivation of the microgrids due to their intermittent generation characteristics,they constitute a risk for system reliability.Battery storage systems(BSSs)stand as one of the most effective solutions for this reliability problem.However,the inappropriate use of BSS creates other operational problems in power systems.In order to deal with these concerns explicitly in microgrids,an optimized microgrid central controller(MGCC)is the key factor,which controls the realtime operation of a microgrid.This work proposes a model predictive control(MPC)based MGCC that will provide optimal control of the microgrid,considering economic and operational constraints.The proposed system will minimize the energy cost of the microgrid by utilizing mixed-integer linear programming(MILP)assuming the presence of DERs and BSS as well as the bi-directional grid connection.Moreover,the aging effect of BSS will be considered in the proposed optimization problem which will provide an up-to-date system model.The proposed method is evaluated using real load and photovoltaic(PV)generation data.Ugur Can Yilmaz Mustafa Erdem Sezgin Murat Gol 2020Journal of Modern Power Systems and Clean Energy2020,8,2:3
9Anti-pancreatic antibody in Turkish patients with inflammatory bowel disease and first-degree relatives显示文摘AIM: To identify the role of anti-pancreatic antibody (PAB) in the diagnosis of inflammatory bowel diseases (IBD) among Turkish patients, and its frequency in firstdegree relatives.METHODS: PAB and anti-Saccharomyces cerevisiae (ASCA) were examined in serum samples of 214 subjects including patients with Crohn's disease (CD, n = 64), ulcerative colitis (UC, n = 63), first-degree relatives of patients with CD (n = 25), first-degree relatives of patients with UC (n = 28),and a control group with gastrointestinal symptoms other than (IBD) (n = 34) by indirect immunofluorescence Positivity of PAB and ASCA was compared in terms of Vienna classification, disease activity and medications used.RESULTS: In terms of PAB positivity, no difference was found between patients with CD (14.1%) and UC (7.9%) however, significant difference was observed between patients with CD and subjects in the control group (P < 0.05). No difference was found between patients with CD and their relatives in terms of ASCA positivity, whereas a significant difference was found between other groups (P < 0.001). Compared to ASCA, the sensitivity of the PAB was 19% (7/37), its specificity was 93% (25/27), positive predictive value was 77% (7/9) and negative predictive value was 45% (25/55). ASCA was found with significantly higher prevalence in patients with CD activity index > 150 (P < 0.05).CONCLUSION: PAB is valuable in the diagnosis of IBD rather than CD, but cannot be used alone for diagnostic purposes. PAB is not superior to ASCA in CD diagnosis and in detecting CD among relatives of patients with CD.Huseyin Demirsoy Kamil Ozdil Ozdal Ersoy Besir Kesici Cetin Karaca Canan Alkim Nihat Akbayir Levent Kamil Erdem Mehmet Derya Onuk Hulya Tugrul Beyzadeoglu 2010World Journal of Gastroenterology2010,16,45:3
10Clinical outcomes of lung metastasectomy in patients with colorectal cancer显示文摘AIM:To investigate prognostic factors of survival following curative,non-palliative surgical removal of lung metastases secondary to colorectal cancer (CRC).METHODS:Between 1999 and 2009,a radical metastasectomy with curative intent was performed on lung metastases in 21 patients with CRC (15 male and 6 female;mean age:57.4 ± 11.8 years;age range:29-74 years) who had already undergone primary tumour resection.RESULTS:The mean number of lung metastases ranged from one to five.The mean overall survival was 71 ± 35 mo (median:25 mo).After adjusting for potential confounders,multivariable Cox regression analyses predicted only the number of lung metastases (1 vs ≥ 2;hazard ratio:7.60,95% confidence interval:1.18-17.2,P=0.03) as an independent predictor of poor survival following lung resection for metastatic CRC.CONCLUSION:Resection of lung metastases is a safe and effective treatment in selected CRC patients with single lung metastases.Omer Fatih Olmez Erdem Cubukcu Ahmet Sami Bayram Unsal Akcali Turkkan Evrensel Cengiz Gebitekin 2012World Journal of Gastroenterology2012,18,7:3
11Extraordinary cause of acute gastric dilatation and hepatic portal venous gas: Chronic use of synthetic cannabinoid显示文摘Addiction to synthetic cannabinoids(SCs) is a growing social and health problem worldwide. Chronic use of SCs may cause adverse effects in the gastrointestinal system. We describe a very rare case of acute gastric dilatation(AGD) and hepatic portal venous gas(HPVG),with findings of acute abdomen resulting from chronic use of a SC, Bonzai. AGD and HPVG were detected by computerized tomography examination. Patchy mucosal ischemia was seen in endoscopic examination. Despite the findings of an acute abdomen, a non-surgical approach with nasogastric decompression, antibiotic therapy, and close radiologic and endoscopic followup was preferred in the presented case. Clinical and radiologic findings decreased dramatically on the first day, and endoscopic findings gradually disappeared over 7 d. In conclusion, this case shows that chronic use of a SC may cause AGD and accompanying HPVG,which can be managed non-surgically despite the findings of acute abdomen.Mert Mahsuni Sevinc Erdem Kinaci Savas Bayrak Aytul Hande Yardimci Ekrem Cakar Hasan Bektas 2015World Journal of Gastroenterology2015,21,37:3
12Brand Equity as a Signaling Phenomenon显示文摘Tülin Erdem Joffre Swait 1998Journal of Consumer Psychology1998,,2:2
13Plexiform fibromyxoma:Review of rare mesenchymal gastric neoplasm and its differential diagnosis显示文摘Plexiform fibromyxoma(PF)is a very rare mesenchymal neoplasm of the stomach that was first described in 2007 and was officially recognized as a subtype of gastric mesenchymal neoplasm by World Health Organization(WHO)in 2010.Histologically,PF is characterized by a plexiform growth of bland spindle to ovoid cells embedded in a myxoid stroma that is rich in small vessels.The lesion is usually paucicellular.While mucosal and vascular invasion have been documented,no metastasis or malignant transformation has been reported.Its pathogenesis is largely unknown and defining molecular alterations are not currently available.There are other mesenchymal tumors arising in the gastrointestinal tract that need to be differentiated from PF given their differing biologic behaviors and malignant potential.Histologic mimics with spindle cells include gastrointestinal stromal tumor,smooth muscle tumor,and nerve sheath tumor.Histologic mimics with myxoid stroma include myxoma and aggressive angiomyxoma.Molecular alterations that have been described in a subset of PF may be seen in gastroblastoma and malignant epithelioid tumor with gliomaassociated oncogene homologue 1(GLI1)rearrangement.The recent increase in publications on PF reflects growing recognition of this entity with expansion of clinical and pathologic findings in these cases.Herein we provide a review of PF in comparison to other mesenchymal tumors with histologic and molecular resemblance to raise the awareness of this enigmatic neoplasm.Also,we highlight the challenges pathologists face when the sample is small,or such rare entity is encountered intraoperatively.Mustafa Erdem Arslan Hua Li Zhiyan Fu Timothy A Jennings Hwajeong Lee 2021World Journal of Gastrointestinal Oncology2021,13,5:2
14Glucagon-like peptide-2 exhibits protective effect on hepatic ischemia-reperfusion injury in rats显示文摘象 Glucagon 一样 peptide-2 (GLP-2 ) 有有势力反煽动性完成并且免于试验性的 ischemia/reperfusion (I/R ) 在肺、肠、心肌的织物的损害。然而,它对在肝的 I/R 损害的保护的能力是未知的。我们在老鼠在肝的 I/R 损害上调查了 GLP-2 预告的处理的潜在的角色。24 只老鼠的一个总数随机被划分成三个组(n = 8 ) 。第一个组是控制组;第二个组是对待车辆的肝的 ischemia/reperfusion (HIR,车辆盐对待) 组;并且第三个组是 GLP-2 pretreated I/R (GLP2 红外) 组。在第三个组的每只老鼠 intraperitoneally 被管理 5 ?????  ???? 溜吗??Naci Topaloglu Adem Kucuk Sule Yildirm Mustafa Tekin Havva Erdem Mustafa Deniz 2015Frontiers of Medicine2015,9,3:2
15Prevalence of microscopic colitis in patients with diarrhea of unknown etiology in Turkey显示文摘AIM: To investigate the prevalence and demography of microscopic colitis in patients with diarrhea of unknown etiology and normal colonoscopy in Turkey. METHODS: Between March, 1998 to July, 2005, 129 patients with chronic non-bloody diarrhea of unexplained etiology who had undergone full colonoscopy with no obvious abnormalities were included in the study. Two biopsies were obtained from all colonic segments and terminal ileum for diagnosis of microscopic colitis. On histopathologic examination, criteria for lymphocytic colitis (intraepithelial lymphocyte ≥ 20 per 100 intercryptal epithelial cells, change in surface epithelium, mononuclear infiltration of the lamina propria) and collagenous colitis (subepithelial collagen band thickness ≥ 10 μm) were explored. RESULTS: Lymphocytic colitis was diagnosed in 12 (9%) patients (Female/Male: 7/5, mean age: 45 year, range: 27-63) and collagenous colitis was diagnosed in only 3 (2.5%) patients (all female, mean age: 60 years, range: 54-65).CONCLUSION: Biopsy of Turkish patients with the diagnosis of chronic non-bloody diarrhea of unexplained etiology and normal colonoscopic findings will reveal microscopic colitis in approximately 10% of the patients. Lymphocytic colitis is 4 times more frequent than collagenous colitis in these patients.Levent Erdem Sadιk Yιldιrιm Nihat Akbayιr Banu Yιlmaz Necati Yenice Orhan Sami Gültekin nder Peker 2008World Journal of Gastroenterology2008,14,27:2
16No significant association between halitosis and upper gastrointestinal endoscopic findings: a prospective study显示文摘以前的研究在在口臭之间的关系上集中了的背景, gastroesophageal 倒流疾病和 Helicobacter pylori.In 我们试图调查在口臭和以前有消化不良并且经历了内视镜的检查的上面的胃肠的内视镜的 findings.Methods 病人之间的相互作用的这研究在消化不良的 study.Symptoms 被包括借助于调查了 halitosis.PatientsAdnan Tas Seyfettin Koklu Ilhami Yuksel Omer Basar Erdem Akbal Ahmet Cimbek 2011Chinese Medical Journal2011,,22:2
17Decision-Making Under Uncertainty: Capturing Dynamic Brand Choice Processes in Turbulent Consumer Goods Markets显示文摘Tülin Erdem Michael P. Keane 1996Marketing Science1996,,:2
18Covid-19疫情期间寒地室内病毒扩散分析及通风建议显示文摘本文针对哈尔滨某生鲜超市,利用COMSOL仿真软件,模拟分析了五种自然通风方式下病毒扩散规律,得出了开门通风和门窗同开通风排污效果最好,并分析了其排污特性。在降低一定热舒适性的前提下,提出了每小时门窗同开通风1-2分钟,或者开门通风2-3分钟,能够快速降低超市内部空气的病毒浓度,明显降低室内人员交叉感染风险。张英博 沈朝 段骁健 Erdem Cuce 2021建筑热能通风空调2021,40,10:2
19Alvarado, Eskelinen, Ohhmann and Raja Isteri Pengiran Anak Saleha Appendicitis scores for diagnosis of acute appendicitis显示文摘AIM:To assess the reliability and practical applicability of the widely used Alvarado,Eskelinen,Ohhmann and Raja Isteri Pengiran Anak Saleha Appendicitis(RIPASA)scoring systems in patients with suspected acute appendicitis.METHODS:Patients admitted to our tertiary center due to suspected acute appendicitis constituted the study group.Patients were divided into two groups.appendicitis group(Group A)consisted of patients who underwent appendectomy and were histopathologically diagnosed with acute appendicitis,and non-appendicitis group(Group N-A)consisted of patients who underwent negative appendectomy and were diagnosed with pathologies other than appendicitis and patients that were followed non-operatively.The operative findings for the patients,the additional analyses from follow up of the patients and the results of those analyses were recorded using the follow-up forms.RESULTS:One hundred and thirteen patients with suspected acute appendicitis were included in the study.Of the 113 patients(62 males,51 females),the mean age was 30.2±10.1(range 18-67)years.Of the 113patients,94 patients underwent surgery,while the rest were followed non-operatively.Of the 94 patients,77patients were histopathologically diagnosed with acute appendicitis.Our study showed a sensitivity level of81%for the Alvarado system when a cut-off value of 6.5was used,a sensitivity level of 83.1%for the Ohmann system when a cut-off value of 13.75 was used,a sensitivity level of 80.5%for the Eskelinen system when a cut-off value of 63.72 was used,and a sensitivity level of 83.1%for the RIPASA system when a cut-off value of 10.25 was used.CONCLUSION:The Ohmann and RIPASA scoring systems had the highest specificity for the diagnosis of acute appendicitis.Hasan Erdem Süleyman etinkünar Koray Das Enver Reyhan Cumhur Deger Mehmet Aziret Hilmi Bozkurt Seluk Uzun Selim Szen Oktay rkrücü 2013World Journal of Gastroenterology2013,19,47:2
20Clinical evaluation of submucosal colonic lipomas: Decision making显示文摘甚至脂肪瘤是胃肠道的最普通的间充质的良性瘤,征兆的结肠的表示是稀罕的。此处,我们评估了受不了结肠的脂肪瘤的各种各样的尺寸的四个病人并且由不同治疗学的形式来临了。Oge Tascilar Güldeniz Karadeniz Cakmak Banu Dogan Gün Bülent Hamdi U(?)an Hakan Balbaloglu Ali Cesur Ali Ugur Emre Mustafa Comert Lütfü Oktay Erdem Selim Aydemir 2006World Journal of Gastroenterology2006,12,31:2
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