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International Journal of Ophthalmology(English edition) 2013年第5期6卷 666-670页

作者： Guzin Iskeleli yunus karakoc Ahmet Ozkok Ceyhun Arici Omer Ozcan Osman Ipcioglu Department of Ophthalmology Cerrahpasa School of MedicineIstanbul University Department of Biophysics Inonu University Department of Biochemistry Gata Haydarpasa Training Hospital

AIM:To compare the effects of first and second generation silicone hydrogel(SiH) contact lens wear on tear film ***:The healthy subjects who have never used contact lenses before were enrolled in the *** film osmolarity values of 16 eyes(group 1) who wore first generation SiH contact lenses were compared with those of 18 eyes(group 2) who wore second generation SiH contact lenses after three months ***:Beforecontactlenswear,tearfilmosmolarity of groups 1 and 2 were 305.02±49.08 milliosmole(mOsm) and 284.66±30.18mOsm,*** three months of contact lens wear,osmolarity values were found 317.74±60.23mOsm in group 1 and 298.40±37.77mOsm in group *** osmolarity values for both groups of SiH contact lens wear after three months periods were slightly higher than before the contact lens wear,the difference was not statistically significant. CONCLUSION:Contact lens wear may cause evaporation from the tear film and can increase tear film osmolarity leading to symptoms of dry eye *** the current study,there is a tendency to increase tear film osmolarity for both groups of SiH contact lens wear,but the difference is not statistically significant.

关键词： dry eye silicone hydrogel contact lens contact lens related dry eye tear film osmolarity

Health awareness and lifestyle toward healthcare-seeking behavior among students in Universitas Advent Indonesia

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Frontiers of Nursing 2024年第3期11卷 337-342页

作者： Alvin Salim Natasha Ulima Sianturi Evi Martha Suryani yunus Elon Nursing Department Riau Andalan Pulp&PaperRiauIndonesia Faculty of Nursing Binawan UniversityJakartaIndonesia Nursing Department UNAI ClinicBandungIndonesia Faculty of Nursing Universitas Advent IndonesiaBandungIndonesia

Objective:Healthcare-seeking behavior(HSB)would affect the prevalence of morbidity and *** are various factors that affect one's *** study aimed to determine if health awareness and lifestyle might relate to ***:A cross-sectional study was applied by using three questionnaires to determine par ticipants'health awareness,lifestyle,and *** study took place in Universitas Advent Indonesia and the students were recruited to be par ***:There were 39 par ticipants joined in this *** of the par ticipants were females,third-year students,and from Accounting *** all participants were aware of their low risk of health issues,had a fine lifestyle,and had moderate ***:One's urge to seek health care facilities was not related to their health awareness and *** was no fur ther study to contradict with this finding at this moment.

关键词： health awareness healthcare-seeking behavior healthcare service utilization lifestyle public health

An Improvement of the Asymptotic Iteration Method for Exactly Solvable Eigenvalue Problems

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Chinese Physics Letters 2007年第11期24卷 3028-3031页

作者： I. Boztosun M. karakoc Faculty of Arts and Sciences Department of Physics Erciyes University Kayseri Turkey

We derive a formula that simplifies the original asymptotic iteration method formulation to find the energy eigenvalues for the analytically solvable cases. We then show that there is a connection between the asymptotic iteration and the Nikiforo-Uvarov methods, which both solve the second order linear ordinary differential equations analytically.

关键词： coated conductor buffer layer self-epitaxy CeO2

Effect of Y addition on microstructure and corrosion behavior of extruded Mg-Zn-Nd-Zr alloy

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Journal of Magnesium and Alloys 2020年第3期8卷 640-653页

作者： Huseyin Zengin yunus Turen Department of Metallurgical and Materials Engineering Karabuk University78050 KarabukTurkey

In this study,the effect of Y addition(0,0.5,1 and 2 wt%)on microstructure and corrosion properties of Mg-6Zn-0.5Zr-1 Nd(wt%)alloy was *** alloys were produced by low-pressure die casting method and extruded at 300℃and 400℃after homogenization treatment at 400℃for 24 *** results showed that the as-cast microstructure of the alloy with no Y addition consisted ofα-Mg,Mg-Zn binary and Mg-Zn-Nd ternary *** increasing Y additions,the average grain size showed a substantial decrease and two kinds of ternary Mg-Zn-Y ternary phases,designated as I-phase(Mg3Zn6Y)and W-phase(Mg3Zn3Y2)were *** treatment resulted in a partial dissolution of second phase *** process gave rise to a remarkable grain refinement due to the DRX *** extruded alloys with no Y addition exhibited poor corrosion resistance due to the strong micro galvanic coupling effect.Y additions up to 1 wt%improved the corrosion resistance due to the formation of finer grains,fine and uniform distribution of second phase particles and more stable oxide film.

关键词： ZK60 magnesium alloys Rare earth Yttrium Extrusion Microstructure Corrosion

Grobner-Shirshov Basis of Twisted Generic Composition Algebras of Affine Type

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Algebra Colloquium 2017年第1期24卷 109-122页

作者： Gulshadam yunus Abdukadir Obul College of Mathematics and System Sciences Xinjiang University Urumqi 830046 China

In this paper, by using PBW bases for the twisted generic composition algebras of affine type, we prove that the set of the skew-commutator relations of the iso-classes of indecomposable representations forms a minima... 详细信息

关键词： Ringel-Hall algebra indecomposable modules Grobner-Shirshov basis skew-commutator relations

Grbner-Shirshov Basis of Quantum Group of Type D_4

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Chinese Annals of Mathematics,Series B 2011年第4期32卷 581-592页

作者： Gulshadam yunus Abdukadir OBUL College of Mathematics and System Sciences Xinjiang University

The authors take all isomorphism classes of indecomposable representations as new generators, and obtain all skew-commutators between these generators by using the Ringel-Hall algebra method. Then they prove that the ... 详细信息

关键词： Ringel-Hall algebra Indecomposable modules GrSbner-Shirshov basis Compositions

Effect of surfactant on the dielectric and electrorheological properties of zinc borate/silicone oil dispersions

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International Journal of Minerals,Metallurgy and Materials 2019年第12期26卷 1523-1530页

作者： Omer yunus Gumus Halil Ibrahim Unal Bursa Technical University Engineering and Natural Sciences FacultyFiber and Polymer Engineering DepartmentBursa 16310Turkey Gazi University Science FacultyChemistry DepartmentSmart Materials Research Lab.Ankara 06500Turkey

Zinc borate(ZB)particles dispersed in silicone oil(SO)at concentrations of φ=5vol%-20vol% were subjected to dielectric analysis to elucidate their polarization strength,time,and *** revealed that all virgin dispersions lacked *** X-100,a non-ionic surfactant,was added to ZB/SO dispersions to enhance the polarizability of ZB *** addition of 1vol% Triton X-100 enhanced the polarizability of ZB/SO dispersions,and the 15vol% ZB/SO system provided the highest dielectric difference Δε′(the difference in ε′values at zero and infinite frequency,Δε′=ε0–ε∝)of *** electrorheological(ER)activities of the ZB/SO/Triton-X dispersion system were determined through the ER response test,and viscoelastic behaviors were investigated via oscillation tests.A recoverable deformation of 36% under an applied electrical field strength of 1.5 kV/mm was detected through creep and creep recovery tests.

关键词： zinc borate electrorheological fluids dielectric analysis surfactant

Modeling, Analysis and Simulation of a High-Efficiency Battery Control System

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Computer Modeling in Engineering & Sciences 2023年第7期136卷 709-732页

作者： Mohammed Ayad Alkhafaji yunus Uzun College of Engineering Technology National University of Science and TechnologyDhi QarIraq Aksaray University Faculty of EngineeringDepartment of Electrical and Electronics EngineeringAksarayTurkey

This paper explains step-by-step modeling and simulation of the full circuits of a battery control system and connected together starting from the AC input source to the battery control and storage *** three-phase half-controlled rectifier has been designed to control and convert the AC power into DC *** addition,two types of direct current converters have been used in this paper which are a buck and bidirectional DC/DC *** systems adjust the output voltage to be lower or higher than the input *** the buck converters,the main switch operates in conduction or cut-off mode and is triggered by a Pulse-Width Modulated(PWM)*** output and input voltage levels ratio are used to calculate thePWMsignal’s duty ***,the duty cycle indicates the operation mode of the converter in steady-state *** this study,we analyze and control of a buck converter with the PWM ***,the bidirectional DC/DC converter has been achieved and optimized by PI control methods to control the battery charging and discharging *** simulation has been applied via the Matlab/Simulink *** results show the activity of each part of the designed circuits starting from the converters and the battery control system in charge and discharge modes.

关键词： Rectifier buck converter bidirectional DC/DC converter PI controller Pulse-WidthModulation(PWM) battery controller

A numerical technique based on collocation method for solving modified Kawahara equation

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Journal of Ocean Engineering and Science 2018年第1期3卷 67-75页

作者： Turgut Ak S.Battal Gazi karakoc Department of Transportation Engineering Yalova UniversityYalova77200 Turkey Department of Mathematics Faculty of Science and ArtNevsehir Haci Bektas Veli UniversityNevsehir50300 Turkey

In this article,a numerical solution of the modified Kawahara equation is presented by septic B-spline collocation *** the von-Neumann stability analysis,the present method is shown to be unconditionally stable.L 2 and L∞error norms and conserved quantities are given at selected *** accuracy of the proposed method is checked by test problems including motion of the single solitary wave,interaction of solitary waves and evolution of solitons.

关键词： Modified Kawahara equation Finite element method Collocation Solitary waves B-spline

Hybrid NOMA Based MIMO Offloading for Mobile Edge Computing in 6G Networks

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China Communications 2022年第10期19卷 12-20页

作者： yunus Dursun Fang Fang Zhiguo Ding School of Electrical and Electronic Engineering University of ManchesterManchesterUK Department of Electrical and Computer Engineering and the Department of Computer Science Western UniversityLondonCanada

Non-orthogonal multiple access (NOMA), multiple-input multiple-output (MIMO) and mobile edge computing (MEC) are prominent technologies to meet high data rate demand in the sixth generation (6G) communication networks. In this paper, we aim to minimize the transmission delay in the MIMO-MEC in order to improve the spectral efficiency, energy efficiency, and data rate of MEC offloading. Dinkelbach transform and generalized singular value decomposition (GSVD) method are used to solve the delay minimization problem. Analytical results are provided to evaluate the performance of the proposed Hybrid-NOMA-MIMO-MEC system. Simulation results reveal that the H-NOMA-MIMO-MEC system can achieve better delay performance and lower energy consumption compared to OMA.

关键词： NOMA MEC MIMO Generalized sin-gular value decomposition sixth generation networks(6G) delay minimization