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Pectoral muscular twitching： a rare manifestation of spontaneous twiddler syndrome

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Journal of Geriatric Cardiology 2017年第8期14卷 532-533页

作者： serdar Bozyel Tolga Aksu Tumer Erdem Guler Kaznn Serhan Ozcan Mujdat Aktas Derince Training and Research Hospital Department of Cardiology Kocaeli Turkey Eregli State Hospital Department of Cardiology Zonguldak Turkey

The twiddler syndrome is maker malfunction, in which vice in its pocket results in an uncommon cause of pace-twisting or rotating of the delead retraction or coiling and subsequent malfunction of an implanted devices such as a pacemaker, an implantable cardioverter-defibrillator （ICD）, cardiac resynchronization therapy （CRT）.

关键词： Pacemaker Twiddler

A Variant of Fermat’s Diophantine Equation

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Advances in Pure Mathematics 2021年第12期11卷 929-936页

作者： serdar Beji Faculty of Naval Architecture and Ocean Engineering Istanbul Technical University Istanbul Turkey

A variant of Fermat’s last Diophantine equation is proposed by adjusting the number of terms in accord with the power of terms and a theorem describing the solubility conditions is stated. Numerically obtained primitive solutions are presented for several cases with number of terms equal to or greater than powers. Further, geometric representations of solutions for the second and third power equations are devised by recasting the general equation in a form with rational solutions less than unity. Finally, it is suggested to consider negative and complex integers in seeking solutions to Diophantine forms in general.

关键词： Variant of Fermat’s Last Equation Positive Integer Solutions of New Fermat-Type Equations Geometric Representations for Solutions of New Diophantine Equations

A Geometric Formulation and a Series Approach for Estimating π with Remarks on a Sumerian Tablet

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Advances in Pure Mathematics 2022年第11期12卷 587-599页

作者： serdar Beji Faculty of Naval Architecture and Ocean Engineering Istanbul Technical University Istanbul Turkey

A recursive method based on successive computations of perimeters of inscribed regular polygons for estimating π is formulated by employing the Pythagorean theorem alone without resorting to any trigonometric calculations. The approach is classical but the formulation of coupled recursion relations is new. Further, use of infinite series for computing π is explored by an improved version of Leibniz’s series expansion. Finally, some remarks with reference to π are made on a relatively recently rediscovered Sumerian tablet depicting geometric figures.

关键词： π from Recursive Formulas for Polygonal Perimeters Arayabatha’s Method of Estimating π Improved Leibniz Series for Computing π Sumerian Tablet of Geometric Figures

Serum Irisin:Pathogenesis and Clinical Research in Cardiovascular Diseases

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Cardiovascular Innovations and Applications 2020年第1期4卷 195-200页

作者： Lutfu Askin Kader Eliz Uze Okan Tanriverdi serdar Turkmen Department of Cardiology Adiyaman Education and Research HospitalAdiyamanTurkey

Recently,muscular function/dysfunction has gained importance in the maintenance of metabolic homeostasis in cardiovascular *** muscle plays a vital role in coordinating the activity and metabolism of endocrine organs by secreting many myokines,especially *** is a polypeptide hormone consisting of 112 amino acids secreted into the blood from muscle and adipose *** irisin levels are associated with cardiometabolic risk factors such as obesity and insulin resistance as defi ned by homeostatic model *** reduces endothelial damage by inhibiting infl ammation and oxidative stress,thus playing a key role in maintaining endothelial cell ***,low irisin levels cause endothelial dysfunction and increase the incidence of *** aimed to summarize the studies on this issue since we have not found any review in the literature on the role of serum irisin levels in the process of atherosclerosis and other cardiovascular events in cardiovascular diseases.

关键词： insulin resistance irisin cardiovascular diseases body mass index

Is the neutrophil to lymphocyte ratio associated with liver fibrosis in patients with chronic hepatitis B?

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World Journal of Gastroenterology 2015年第18期21卷 5575-5581页

作者： Murat Kekilli Alpaslan Tanoglu Yusuf serdar Sakin Mevlut Kurt Serkan Ocal Sait Bagci Department of Gastroenterology Hitit University Corum Training and Research Hospital Department of Gastroenterology GATA Haydarpasa Training Hospital Department of Gastroenterology Gulhane Military Medical Academy School of Medicine Department of Gastroenterology Abant ?zzet Baysal Faculty of Medicine Training and Research Hospital

AIM: To determine the association between the neutrophil to lymphocyte(N/L) ratio and the degree of liver fibrosis in patients with chronic hepatitis B(CHB) infection. METHODS: Between December 2011 and February 2013, 129 consecutive CHB patients who were admitted to the study hospitals for histological evaluation of chronic hepatitis B-related liver fibrosis were included in this retrospective study. The patients were divided into two groups based on the fibrosis score: individuals with a fibrosis score of F0 or F1 were included in the "no/minimal liver fibrosis" group, whereas patients with a fibrosis score of F2, F3, or F4 were included in the "advanced liver fibrosis" group. The Statistical Package for Social Sciences 18.0 for Windows was used to analyze the data. A P value of < 0.05 was accepted as statistically ***: Three experienced and blinded pathologists evaluated the fibrotic status and inflammatory activity of 129 liver biopsy samples from the CHB patients. Following histopathological examination, the "no/minimal fibrosis" group included 79 individuals, while the "advanced fibrosis" group included 50 individuals. Mean(N/L) ratio levels were notably lower in patients with advanced fibrosis when compared with patients with no/minimal fibrosis. The mean value of the aspartate aminotransferase-platelet ratio index was markedly higher in cases with advanced fibrosis compared to those with no/minimal ***: Reduced levels of the peripheral blood N/L ratio were found to give high sensitivity, specificity and predictive values in CHB patients with significant fibrosis. The prominent finding of our research suggests that the N/L ratio can be used as a novel noninvasive marker of fibrosis in patients with CHB.

关键词： Chronic hepatitis B Liver fibrosis Neutrophil to lymphocyte ratio Fibrotic stage Inflammatory activity Non-invasive marker

Estimating Sums of Convergent Series via Rational Polynomials

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Advances in Pure Mathematics 2023年第4期13卷 187-197页

作者： serdar Beji Faculty of Naval Architecture and Ocean Engineering Istanbul Technical University Istanbul Turkey

Sums of convergent series for any desired number of terms, which may be infinite, are estimated very accurately by establishing definite rational polynomials. For infinite number of terms the sum infinite is obtained by taking the asymptotic limit of the rational polynomial. A rational function with second-degree polynomials both in the numerator and denominator is found to produce excellent results. Sums of series with different characteristics such as alternating signs are considered for testing the performance of the proposed approach.

关键词： Sums of Series Rational Polynomials Extrapolation to Limit Asymptotic Value

Modified Elite Opposition-Based Artificial Hummingbird Algorithm for Designing FOPID Controlled Cruise Control System

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Intelligent Automation & Soft Computing 2023年第11期38卷 169-183页

作者： Laith Abualigah serdar Ekinci Davut Izci Raed Abu Zitar Computer Science Department Prince Hussein Bin Abdullah Faculty for Information TechnologyAl al-Bayt UniversityMafraq25113Jordan Department of Electrical and Computer Engineering Lebanese American UniversityByblos13-5053Lebanon Hourani Center for Applied Scientific Research Al-Ahliyya Amman UniversityAmman19328Jordan Applied Science Research Center Applied Science Private UniversityAmman11931Jordan School of Computer Sciences Universiti Sains MalaysiaPulau Pinang11800Malaysia School of Engineering and Technology Sunway University MalaysiaPetaling Jaya27500Malaysia Department of Computer Engineering Batman UniversityBatman72100Turkey MEU Research Unit Middle East UniversityAmmanJordan Sorbonne Center of Artificial Intelligence Sorbonne University-Abu DhabiAbu DhabiUnited Arab Emirates

Efficient speed controllers for dynamic driving tasks in autonomous vehicles are crucial for ensuring safety and *** study proposes a novel approach for designing a fractional order proportional-integral-derivative(FOPID)controller that utilizes a modified elite opposition-based artificial hummingbird algorithm(m-AHA)for optimal parameter *** approach outperforms existing optimization techniques on benchmark functions,and we demonstrate its effectiveness in controlling cruise control systems with increased flexibility and *** study contributes to the advancement of autonomous vehicle technology by introducing a novel and efficient method for FOPID controller design that can enhance the driving experience while ensuring safety and *** highlight the significance of our findings by demonstrating how our approach can improve the performance,safety,and reliability of autonomous *** study’s contributions are particularly relevant in the context of the growing demand for autonomous vehicles and the need for advanced control techniques to ensure their safe *** research provides a promising avenue for further research and development in this area.

关键词： Cruise control system FOPID controller artificial hummingbird algorithm elite opposition-based learning

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微生物对混凝土的侵蚀(英文)

硅酸盐学报 2010年第9期38卷 1741-1745页

作者： DUBRAVKA Bjegovic MARIJANA serdar IGOR Cigrovski Faculty of Civil Engineering University of Zagreb Zagreb 10000 Croatia Institut IGH Zagreb 10000 Croatia

微生物侵蚀会导致混凝土的严重破坏,尤其导致了城市污水收集和处理系统的过早破坏,使其需要提前修复。世界范围内的研究结果表明:处于污水和下水道污泥中的混凝土会遭受由硫酸盐、酸、CO2等导致的严重破坏。评述了混凝土处于利于细菌生... 详细信息

微生物侵蚀会导致混凝土的严重破坏,尤其导致了城市污水收集和处理系统的过早破坏,使其需要提前修复。世界范围内的研究结果表明:处于污水和下水道污泥中的混凝土会遭受由硫酸盐、酸、CO2等导致的严重破坏。评述了混凝土处于利于细菌生长和生物降解环境中时的细菌、微生物侵蚀破坏过程。此外还分析了硫酸产生的机理(硫循环)、用于污水管道系统和农用工业的混凝土的受侵蚀破坏机理以及评价混凝土抵抗微生物侵蚀的方法。

关键词：混凝土的微生物侵蚀混凝土的破坏微生物细菌废水硫酸盐

Utilization of leather fibrous wastes for the production of reconstituted fibric materials:heavy metal determination and removal

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Waste Disposal and Sustainable Energy 2022年第1期4卷 29-37页

作者： Rethinam Senthil serdar Batıkan Kavukcu A.Wilson Aruni Urana Dandar Bahri Basaran Vijayan Sumathi Graduate School of Natural and Applied Science Ege University35100 BornovaIzmirTurkey School of Bio and Chemical Engineering Sathyabama UniversityChennaiTamilnadu 600199India Department of Chemistry Ege University35100 BornovaIzmirTurkey California University of Science and Medicine 217 E Club Centre Dr suite aSan BernardinoCA 92408USA Department of Leather Engineering Ege University35100 BornovaIzmirTurkey School of Electrical Engineering and Centre for Automation VIT Chennai CampusChennaiTamilnadu 600127India

Incomprehension concerning heavy metal containing finished solid leather wastes leads to environmental *** of these solid leather waste into energy and resource efficient products proves to be ***,leather microfibres(LMF)were isolated from these heavy metal containing finished solid leather *** heavy metal contain LMF further processed into metal reduction *** metal reduction LMF were investigated for their heavy metal removal efficiency and toxicity *** Cr(III)and Cr(VI)content of LMF was<1000μg/mL and<800μg/mL,*** estimation was proved that the LMF had less than 1%.The study attempt to prepare reconstituted fibric materials(RFM)from metal reduction LMF and cellulose nanofibres(CNF).RFM were characterized for their physicochemical and mechanical ***,the study has proved a novel concept of RFM production which is recyclable,environmental friendly and cost effective.

关键词： Leather fibres Metal recovery Leather wastes Reconstituted fibric material Recyling