Cellular and corrugated cross-sectioned thin-walled steel bridge-piers/columns

Ucak, Alper,Tsopelas, Panos Techno-Press 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.24 No.3

Thin walled steel bridge-piers/columns are vulnerable to damage, when subjected to earthquake excitations. Local buckling, global buckling or interaction between local and global buckling usually is the cause of this damage, which results in significant strength reduction of the member. In this study new innovative design concepts, "thin-walled corrugated steel columns" and "thin-walled cellular steel columns" are presented, which allow the column to undergo large plastic deformations without significant strength reduction; hence dissipate energy under cyclic loading. It is shown that, compared with the conventional designs, circular and stiffened box sections, these new innovative concepts might results in cost-effective designs, with improved buckling and ductility properties. Using a finite element model, that takes the non-linear material properties into consideration, it is shown that the corrugations will act like longitudinal stiffeners that are supporting each other, thus improving the buckling behavior and allowing for reduction of the overall wall thickness of the column.

CASE REPORT : Acute Generalized Exanthematous Pustulosis Associatedwith Tigecycline

( Savas Ozturk ),( Cemal Ustun ),( Sultan Pehlivan ),( Haydar Ucak ) 대한피부과학회 2014 Annals of Dermatology Vol.26 No.2

Acute generalized exanthematous pustulosis (AGEP) is a severe and rare eruption that develops mostly from factors related to drugs. It is characterized by a fever and a pustular eruption on the erythematous skin with an acute onset and without follicular localization. Etiopathogenesis has not yet been fully explained. Although it is similar to pustular psoriasis, its clinical, historical and histopathological characteristics are different. In this article, we present a case of AGEP associated with tigecycline that developed in a patient followed up in the intensive care unit for three months with an intra-abdominal injury after a trauma and Acinetobacter baumannii infection.

RetroTRAE: Retrosynthetic Translation of \\ Atomic Environments with Transformer

Juyong Lee(이주용),Umit V. Ucak,Islambek Ashyrmamatov,Junsu Ko 한국고분자학회 2022 한국고분자학회 학술대회 연구논문 초록집 Vol.47 No.1

A giant choledochal cyst in infancy: a case report

Nursel Yurttutan,Suleyman Cuneyt Karakus,Naim Koku,Mustafa Demirci,Ramazan Ucak 대한소아청소년과학회 2016 Clinical and Experimental Pediatrics (CEP) Vol.59 No.5

Choledochal cyst is a dilation that encloses the intrahepatic or both extra- and intrahepatic portions of the biliary ducts. Postnatally, ultrasonography is the initial diagnostic modality of choice, allowing for precise measurements of intra- or extrahepatic duct dilatation and identification of stones and sludge. Symptoms depend on the age at presentation. Common bile duct malformations should be considered as a differential diagnosis of a cystic mass regardless of the cyst’s size or patient’s age, especially in children presenting with abdominal pain, jaundice, and palpable mass. To the best of our knowledge, we report the largest choledochal cyst in infancy.

A giant choledochal cyst in infancy: a case report

Yurttutan, Nursel,Karakus, Suleyman Cuneyt,Koku, Naim,Demirci, Mustafa,Ucak, Ramazan The Korean Pediatric Society 2016 Clinical and Experimental Pediatrics (CEP) Vol.59 No.5

Choledochal cyst is a dilation that encloses the intrahepatic or both extra- and intrahepatic portions of the biliary ducts. Postnatally, ultrasonography is the initial diagnostic modality of choice, allowing for precise measurements of intra- or extrahepatic duct dilatation and identification of stones and sludge. Symptoms depend on the age at presentation. Common bile duct malformations should be considered as a differential diagnosis of a cystic mass regardless of the cyst's size or patient's age, especially in children presenting with abdominal pain, jaundice, and palpable mass. To the best of our knowledge, we report the largest choledochal cyst in infancy.

Slide Session : OS-END-20 ; Endocrinology : Hemorheological Approach for Early Detection of Diabetic NephropathyCardiovascular Risk Rates in Metabolic Syndrome and Atherosclerotic Marker Serum MatrIx MetalloproteIn-ase-9 Levels

( Sibel Serin ),( Yildiz Okuturlar ),( Asuman Gedikbasi ),( Esra Demir ),( Sema Ucak Basat ),( Ozlem Harmankaya ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Introduction: Metabolic syndrome (MS) is associated with increased cardiovascular risk. There are a lot of study that is releated with the correlation between metabolic syndrome and low grade inflammation. We have attempted to compare Framingham Risk Score(FRS) that calculates cardiovascular risc rates and Matrix Metalloproteinase- 9 levels that is an aterosclerotic proinflammatory marker, on metabolic syndrome`s between other healties. Method: We included 86 patients that contains 51 MS and 35 healties to this study..In both groups, age, length, weight, BMI, waist circumference, familial hearth disease and HT on family was registered. Framingham risk score (FRS) was calculated. Insulin, glucose, HOMA-IR, total cholesterol, LDL, HDL, Triglyceride levels saved. Blood samples for MMP -9 levels were taken and stored at -80 ℃. MMP-9 levels measured by the way of solid phase platinium ELISA (BIOSOURCE). Results: This case contained 86 patients, 51 of them is MS (%59.3) and the others are called as control group (%40.7). Ages of patients are changed between 20-55 years and the mean age is 38.52±10.02. FRS of MS patients were calculated statistically high compaired to control group (p=0.017). MMP-9 levels of MS patients were calculated statistically high compaired to control group (p=0.001).In both goups, there is no statistically significant relationship between MMP-9 levels and FRS (p>0.05) Conclusion: MMP-9 changes between the groups of MS young aged of 20-55 and health group may show us early atherosclerosis. At the group of high MMP-9 levels, even age releated cardiovasculary hearth disease risks are lower, risk was statistically calculated high compared to the other healthy populations. This situation is important in order to control risk factors as MS at early ages.

Poster Session:PS 0191 ; Endocrinology : In Circulation Increased Antithyroid Peroxidase Antibody and Matrix Metalloproteinase-9 Levels at Patients with Metabolic Syndrome

( Sibel Serin ),( Yildiz Okuturlar ),( Asuman Gedikbasi ),( Irem Kilic Utku ),( Sema Ucak Basat ),( Ozlem Harmankaya ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Objective: Frequent changes in parameters like blood pressure, plasma lipid changes, waist circumference which are accepted as a metabolic syndrome (MS) are observed in thyroid patients with hypothyroid. In this study we investigated serum levels of TPO which is the diagnosis of hypothyroid and prognosis criteria antithyroid peroxidase antibody (Anti-TPO) in patients with MS and we analysed the correlation with matrix metalloproteinases-9 (MMP-9) which is accepted as an indicator of infl ammation in MS. Method: 51 patients with MS and 35 controls were enrolled in the study. Age, body mass index (BMI), waist circumference and hypertension (HT) values of both group were recorded in the beginning. Medical records of HT were noted and cardiovascular diseases in their family were queried. Insulin, glucose, HOMA-IR, total cholesterol, LDL, HDL, TG, TSH and Anti-TPO levels were measured. Blood samples for measuring MMP- 9 were stored at -80°C. Measurement of MMP-9 was performed by using solid phase platinum ELISA kits (Biosource). Results: Study was performed with 51(59,3%) MS group and 35(40,7%) control group. Both Anti-TPO and MMP-9 levels of patients with MS were statistically and signifi cantly higher than the levels of control group (p<0.01 for both group). There is a statistically signifi cant correlation (positive, 83.2%) between MMP-9 and TPO in patients with MS (p<0.01). There is a statistically signifi cant correlation (positive, 37.5%) between MMP-9 and TPO in controls (p<0.05). Discussion: Researching Anti-TPO in patients with MS might be an indicator of higher rate of both hypothyroid and MS. High levels of both MMP-9 (>76 mg/ml) and TPO show that TPO can be used as a cheaper and more easily provided marker in patients with MS without acute thyroid. Anti-TPO follow-up might be necessary in MS diagnosis and monitoring.

Poster Session : PS 0453 ; Infectious Disease ; Infective Endocarditis Case Presented with Endogenous Endophtalmitis

( Kevser Kutlu Tatar ),( Sibel Serin ),( Ece Yigit Taskin ),( Betul Ayaz ),( Sema Ucak Basat ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Endogenous endophtalmitis (EE), a sight-threating emergency,has been reported as the 2-8% of all endophthalmitis cases. EE is most often associated with a diagnosed underlying medical condition, including DM, liver disease, cardiac disease, malignancy, in-dwelling catheters and intravenous drug abuse (IVDU). A woman, 69 year-old, diagnosed with EE was followed up in the ophthalmology clinic for vitrectomy, consulted due to abdominal pain, pyuria and high levels of cholestasis enzymes. The patient had DM, hypertension, and ischemic heart disease for the last decade and severe heart failure for the last month. She had femoral catheter for ultrafi ltration two weeks ago. She was transferred to the internal medicine clinic with the differential diagnosis of heart failure, acute cholecystitis and urinary tract infection. In the MRCP imaging following an abdominal US, a signal differentiation due to possible metastasis or abscess was identifi ed in the liver. Multiple calculus in the neck of the bile cyst and cystic duct, sludge in gallbladder, expansion in choledoch diameter and multiple calculus at the distal part of choledoch were detected. A bilobular and fi at contoured, 85x140mm lesion was found at the left adnexa. A third echocardiography in a month was performed for her recently diagnosed cardiac failure and 2/6 systolic murmur, which was detectable best from the mitral point. The last echocardiography showed %50 EF, intermediate-advanced mitral insufficiency and a mass-vegetation on mitral valve. TEE, performed afterwards, showed vegetation on mitral valve and the possibility of valve perforation. Due to the continuation of decompensation and total obstruction in circumfi ex artery seen on the coronary angiography, coronary bypass and vegetation removal operations were performed. In this case, we present a case which has almost all the etiological reasons together except IVDU and which was diagnosed as IE based upon the EE diagnosis.