The First Design and Application of Floating Photovoltaic (FPV) Energy Generation Systems in Turkey with Structural and Electrical Performance

Mustafa Kemal Kaymak,Ahmet Duran Sahin 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.3

Greenhouse gas (GHG) emissions are primarily due to the exploitation of fossil fuel as an energy source, and one of the energy alternatives for the reduction of emissions is the use of renewable energy sources; one of these is solar irradiation conversion to useable clean energy. In the city of Istanbul, floating photovoltaic (FPV) installation started in 2017, on one of the lakes with an extensive surface area, Buyukcekmece, which supplies water to the city. To reduce evaporation losses and to generate electricity, two FPV prototypes were installed, with capacities of 9 and 90 kWp. Due to the location and climate of Buyukcekmece Lake, all system components including steel construction, metal sheet, maintenance way, connecting parts, and pontoons must resist extreme weather conditions, especially harsh waves and high wind loads. This paper is focused on a survey of the survival performance of the FPV system under real weather conditions without blockage of evaporation, just the reduction of it. Stress and strain tests were also applied to pontoons, one of the vital components for floating systems. The elasticity module, yield limit and tensile strength were evaluated as 0.42 GPA, 11.5 mPA, and 19 mPA, respectively. The wave height was calculated by means of four practical relationships, taking the lake’s distinctive characteristics into consideration. The electricity generation of 90 kWp FPV measured for June 2017 was 5189 kWh. The structural and electrical performance results from these systems in the city of Istanbul could be applied further to large scale FPV applications in water reservoirs nationally and internationally.

Poster Session : PS 0160 ; Diabetes : Qt Dispersion: Comparison Between Type 2 Diabetic with Microalbuminuria Positive and Negative Patients

( Esma Altunoglu ),( Mustafa Boz ),( Cuneyt Muderrisoglu ),( Fusun Erdenen ),( Ender Ulgen ),( Mustafa Duran ),( Nurcan Ozbas ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: It is shown that the variability of distance between QT derivations in twelve derivation ECG; is risk factor for sudden death as a predictor of cardiovascular mortality in both diabetic and general population. Diabetic nephropathy is one of the most common complication of diabetes. The purpose was to investigate the relationship between QT parameters and microalbumin/creatinine ratio; as an indicator of endothelial function and a cardiovascular risk factor. Methods: 100 patients were included our study who were follow up Istanbul Education and Research Hospital Diabetes Outpatient Clinic. 50 patients whose microalbumin/ creatinine ratio less than 30 mg/dl and ages between 36 and 77 years were chosen as control group; 50 patients whose microalbumin/ creatinine ratio between 30- 300 mg/dl and ages between 36 and 79 years were chosen as patient group. The QT interval was measured on the 12-lead resting ECG. QTd was calculated automatically using special software. Results: In patients group QTC min median value was higher; 380,63(361,44-397,30), (p=0,042),QTC max median value was significantly higher; 439,63(420,17-460,22), (p=0,005) and microalbumin/creatinine value 82(60-300), (p=0,0001) was very signifi cantly higher than control group. There was no signifi cant difference QTC dispersion median value 61,25(49,91-81,70, (p=0,066) in both groups. Also a good correlation in positive direction between QTC dispersion values and microalbumin/creatinine value was determined. Conclusions: We researched the relation between microalbumin/creatinine ratio and QTd levels in type 2 diabetic patients. QTc max period was determined signifi cantly high in the group with microalbumin/creatinine between 30-300 mg/dl (p<0,05). As a result of this correlation QT prolongation can be use as a contributory parameter for prediction of cardiovascular risk. This study make us that QTd can be used as early indicator of cardiovascular risk in diabetic patients who aren`t in microalbuminuric stage yet.

Separation and preconcentration of lead, chromium and copper by using with the combination coprecipitation-flame atomic absorption spectrometric determination

Zekeriyya Bahadır,Mustafa Soylak,Volkan Numan Bulut,Duygu Ozdes,Celal Duran,Hakan Bektas 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3

A coprecipitation method was developed for the quantitative separation and preconcentration of Pb(II),Cr(III) and Cu(II) ions. Analytes were coprecipitated using a triazole derivative (2-{4-[2-(1H-indol-3-yl)ethyl]-3-(4-chlorobenzyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl}-N-aryl methylidene acetohydrazid). The analytes were analyzed by flame atomic absorption spectrometry. The parameters suchas sample pH, amount of reagent, sample volume, matrix effects etc. were investigated. The enrichmentfactor for the analyzed metal ions was obtained as 50. The relative standard deviations (RSD) were in therange of 2.8–4.1%. The accuracy of the proposed procedure was checked by the analysis of the CRM-CSandySoil C. The method was successfully applied to real samples.

Asymptomatic Accessory Mitral Valve Tissue Diagnosed by Echocardiography

Onur Kadir Uysal,Mustafa Duran,Bugra Ozkan,Kamuran Tekin,Zafer Elbasan 대한심장학회 2012 Korean Circulation Journal Vol.42 No.11

Analysis of C-Reactive Protein and Biochemical Parameters in Pericardial Fluid

Turan Ege,Melih Hulusi US,Mustafa Cikirikcioglu,Cavidan Arar,Enver Duran 연세대학교의과대학 2006 Yonsei medical journal Vol.47 No.3

This study was designed to examine the relationship between pericardial fluid and plasma CRP levels, and to alterations in other biochemical parameters in patients undergoing Coronary Artery Bypass Grafting (CABG). The study group consisted of 96 Coronary Artery Disease (CAD) patients who were referred to our clinic for a CABG procedure and from whom sufficient amount of pericardial fluid could be collected. The patients were classified into 3 groups: Stable Angina Pectoris (SAP) (n=27), Unstable Angina Pectoris (USAP) (n=36), and Post-Myocardial Infarction (PMI) (n=33). Levels of CRP, glucose, albumin, total protein, Creatine Kinase (CK), Creatine Kinase-MB (CK- MB), and Lactate Dehydrogenase (LDH) were determined in pericardial fluid samples and in simultaneously collected blood samples from radial artery. The pericardial CRP and LDH levels in the PMI group were higher than in the SAP (p=0.015 and p=0.000, respectively) and USAP (p=0.011, p=0.047) groups. Serum CRP levels in USAP (p=0.014) and PMI (p= 0.000) groups were higher than those in the SAP group. Pericardial albumin levels in the PMI group were higher than in the USAP group (p=0.038). In all groups, the pericardial fluid/serum protein ratio was > 0.5, the LDL ratio was >0.6, and pericardial fluid LDH concentrations were >300mg/dl. CRP level of pericardial fluid was significantly higher in the PMI group than in other groups. However, pericardial fluid LDH levels were higher than blood LDH levels in this group and were also higher than pericardial fluid LDH levels of other groups.

Positive Effects of Oral β-Glucan on Mucositis and Leukopenia in Colorectal Cancer Patients Receiving Adjuvant FOLFOX-4 Combination Chemotherapy

Karaca, Halit,Bozkurt, Oktay,Ozaslan, Ersin,Baldane, Suleyman,Berk, Veli,Inanc, Mevlude,Duran, Ayse Ocak,Dikilitas, Mustafa,Er, Ozlem,Ozkan, Metin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.8

The present study aimed to determine the effect of oral ${\beta}$-glucan on mucositis and leukopenia in 62 consecutive patients with colorectal cancer treated with an adjuvant FOLFOX-4 regimen. The patients were retrospectively evaluated in 2 groups: one group received ${\beta}$-glucan and the other did not (control group). Leucocytes, neutrophils, and platelets were evaluated before and 1 week after chemotherapy and oral mucositis and diarrhea were noted. Leucocyte and neutrophil counts after chemotherapy in the ${\beta}$-glucan group were $7,300/mm^3$ and $3,800/mm^3$, respectively, and the reductions, as compared to baseline, were not significant (p=0.673 and 0.784). The median platelet count was $264,000/mm^3$ after chemotherapy in the ${\beta}$-glucan group and the reduction, as compared to baseline, was borderline significant (p=0.048). In the control group, reduction in leucocyte, neutrophil, and platelet counts was statistically significant. Oral mucositis and diarrhea were less common in the ${\beta}$-glucan group. We conclude that ${\beta}$-glucan can be used to reduce the adverse effects of chemotherapy.