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Istanbul, Turkey

Maltepe University is a private university located in Maltepe district of Istanbul, Turkey. It was established on July 9, 1997 by "Istanbul Marmara Education Foundation" . The institution has a broad scope of education starting from the elementary level to university. The first students graduated in June 2001. Wikipedia.

Ceriba S.,Maltepe University
Mechanics of Advanced Materials and Structures | Year: 2012

Elastic and functionally graded (FGM) Kirchhoff plates are investigated in this study. Meshless approximate methods are employed for solution of plate equations. For static analysis, uniformly distributed load and clamped boundaries are assumed. Galerkin's method is used to solve the partial differential equation of plates. In addition, vibration characteristics of simply supported FGM plates are studied by using the Ritz method. The Poisson's ratios of plates are assumed to be constant, but Young's modulus varies functionally. The effective Young's modulus of the plates, made of isotropic ceramic and metal constituents with volume contents varying only in the thickness direction, is computed using the Mori-Tanaka homogenization technique. The objective here is to investigate the influence of volume fractions and the component materials on mechanical behavior of super elliptical plates. © Taylor and Francis Group, LLC.

Aim To define and assess the short-term clinical feasibility of fill and aspirate foam sclerotherapy (FAFS) for treating large superficial varicose veins concomitant to endovenous laser ablation (EVLA).Materials and methods Twenty-seven patients who refused to have phlebectomies with great saphenous vein reflux and large superficial varicosities were included in the study. Both EVLA and FAFS were performed concomitantly. FAFS is a technique in which all or most of the bubbles and blood-foam mixture are removed from the targeted large varicose veins immediately after the foam has caused sufficient damage to the endothelial cells. Patients were reviewed 1 month and 6 months after the treatment. Improvement in the clinical, aetiological, anatomical, and pathological classification (CEAP), and clinical severity was graded using the revised venous clinical severity score (rVCSS) and cosmetic results were investigated at the 6 month visit.Results Ablation of GSV was performed in 27 limbs in 27 patients (19 males, 70.3%; mean age 44 years; range 21-69 years). All patients had a technically successful FAFS treatment. The CEAP classification score, the rVCSS values, and the cosmetic results showed prominent improvement 6 months after the treatment. There were no significant complications, such as stroke, skin burns, necrosis, paresthesia, deep-vein thrombosis, or allergic reaction. None of the patients experienced neurological events.Conclusion FAFS is a promising safe and effective technique for treating large superficial varicosities concomitant to EVLA of the truncal veins with excellent clinical results. Randomized prospective studies with larger series are required to compare the FAFS with ambulatory phlebectomy and standard foam sclerotherapy. © 2014 The Royal College of Radiologists.

Atasoy M.M.,Maltepe University
Journal of Vascular and Interventional Radiology | Year: 2015

Purpose To investigate the efficacy and safety of endovenous laser ablation (EVLA) with high energy delivery in large great saphenous veins (GSVs) at 1-year sonographic follow-up. Materials and Methods Retrospective review of 385 patients who underwent EVLA between August 2011 and September 2013 was conducted, and 44 consecutive patients (21 women [47%]; mean age, 41 y; range, 23-66 y) with 49 large GSVs were included. Vein size and clinical follow-up results were recorded. A 600-μm bare-tipped 1,470-nm laser fiber was used for the EVLA procedure. Intended energy delivery was 150 J/cm (10 sessions at 15 W) for proximal GSV segments less than 20 mm in diameter and 195 J/cm (13 sessions at 15 W) for larger veins. Improvements in clinical and quality-of-life scores at 6 months were assessed with three validated scoring systems. Results Mean GSV diameter was 16.95 mm (range, 15-26 mm). Five patients had GSVs at least 20 mm in diameter. Technical success was observed in 48 GSVs (97.9%) at 1-month follow-up. A second EVLA treatment was performed in one case and achieved closure, for a GSV occlusion rate of 100% at 6 months. All patients showed significant clinical improvement on all three scoring systems (P <.001). One-year follow-up was completed in 48 of 49 cases (98%). No recanalization was observed at 1-year follow-up, and there were no major complications. Conclusions Sonographic follow-up at 1 year shows that EVLA is an effective and safe procedure with excellent technical success rates in the treatment of large GSVs. © 2015 SIR.

Cakalli H.,Maltepe University
Mathematical and Computer Modelling | Year: 2011

A subset E of a metric space (X,d) is totally bounded if and only if any sequence of points in E has a Cauchy subsequence. We call a sequence (xn) statistically quasi-Cauchy if st-limn→∞d(xn+1,xn)=0, and lacunary statistically quasi-Cauchy if Sθ-limn→∞d(xn+1,xn)=0. We prove that a subset E of a metric space is totally bounded if and only if any sequence of points in E has a subsequence which is any type of the following: statistically quasi-Cauchy, lacunary statistically quasi-Cauchy, quasi-Cauchy, and slowly oscillating. It turns out that a function defined on a connected subset E of a metric space is uniformly continuous if and only if it preserves either quasi-Cauchy sequences or slowly oscillating sequences of points in E. © 2011 Elsevier Ltd.

Cakalli H.,Maltepe University
Mathematical and Computer Modelling | Year: 2011

Recently, it has been proved that a real-valued function defined on a subset E of R, the set of real numbers, is uniformly continuous on E if and only if it is defined on E and preserves quasi-Cauchy sequences of points in E where a sequence is called quasi-Cauchy if (δxn) is a null sequence. In this paper we call a real-valued function defined on a subset E of Rδ-ward continuous if it preserves δ-quasi-Cauchy sequences where a sequence x=(xn) is defined to be δ-quasi-Cauchy if the sequence (δxn) is quasi-Cauchy. It turns out that δ-ward continuity implies uniform continuity, but there are uniformly continuous functions which are not δ-ward continuous. A new type of compactness in terms of δ-quasi-Cauchy sequences, namely δ-ward compactness is also introduced, and some theorems related to δ-ward continuity and δ-ward compactness are obtained. © 2010 Elsevier Ltd.

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