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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 163-169页

作者： Kürşat Tanriöven ferhat Daldaban Mahmut Erkut Cebeci Osman Bülent Tör Saeed Teimourzadeh Kayseri Electric Distribution Co. KayseriTurkey Erciyes University KayseriTurkey EPRA Electric Energy AnkaraTurkey

Consecutive charging and discharging of storage devices(SDs)might deem beneficial from the perspective of short-term ***,it highly impacts the life span of the embedded battery and render restrictions on energy storage *** investigate short-term and long-term constraints of SDs through a three-stage price-elastic approach to the optimal operation of small-scale SDs in smart *** first stage deals with data and scenario characterization where the data for determining short-term and long-term operation constraints of SD are *** number of scenarios are generated to represent uncertain parameters such as long-term demand forecasting,daily load profile,electricity price,and photovoltaic(PV)*** second stage optimizes the long-term operation of SD using the envisioned scenarios subject to the long-term operation constraints and the installment costs of *** outputs of this stage are two indicators referred to as price elasticity and price offset coefficients,which are used as the inputs for the third *** third stage is responsible for decision-making on short-term operation of *** outputs of the second stage along with short-term forecasting for daily electricity price,daily load and daily PV generation are *** on the acquired data,proper price elasticity and price offset are determined for optimal *** simulations are performed for different demand forecasting and electricity *** results confirm the effectiveness of the proposed approach.

关键词： Storage device depth-of-discharge life span smart house

Effects of stand types on recreational preferences of society in the Sub-Alpine Zone,northern Turkey

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Journal of Mountain Science 2022年第11期19卷 3246-3256页

作者： Tuğrul VAROL Halil BarışÖZEL ferhat KARA İlkimÇAVUŞKARA Sezgin AYAN Bartın University Faculty of ForestryDepartment of Forest EngineeringBartın 74100Turkey Kastamonu University Faculty of ForestryDepartment of Forest EngineeringKastamonu 37150Turkey Kastamonu-Ilgaz Mountain National Park Directorate Kastamonu 37100Turkey

The main objective of this study was to examine how different stand types influenced the tendency of visitors for varying recreational activities(i.e.,hiking,trekking,camping and hunting)from 1993 to 2018 in the surrounding areas of Uluyayla Natural Recreation Site in Bart1n,northern Turkey.A total of 627 visitors were selected on a voluntary basis,and questioned in the form of *** of the participants were in the age of 21-40 years old,and they were mostly(62.4%)*** of the participants(82.7%)lived in cities,while 62.8%of them were tourists when visiting the *** determining the preferences of the visitors regarding the stand types for different recreational activities,several images of each stand were shared with them,and they were asked which stand type they would prefer for a given recreation activity(i.e.,hiking,tracking,camping and hunting).A range of options from 1 to 5 in Likert's scale was used in evaluating the given *** degree of positive and negative effects was examined via trend *** was found that stand type had influence on the preferences of visitors regarding the recreational *** general,unmanaged and moderately treated stands were more preferred by visitors for the recreational purposes,compared to the previously managed *** the other hand,visitors'preference for the activities were different during two periods(i.e.,1993-2005 and 2006-2018).For each recreational activity,there was an increasing trend from 1993 to *** had been a continuous increase for hunting since 1996,and for trekking and camping after *** increases between 1993-1996 and 1996-1999 were likely due to the increasing awareness of the society as a result of the training and consciousness raising activities for nature *** demand on the recreational activities continuously increased in unmanaged and moderately treated stands,while no significant changes were examined in the previously managed *** st

关键词： Camping Hunting National Park Recreation Subalpine Silviculture

A new device for paravalvular leak closure

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Journal of Geriatric Cardiology 2015年第2期12卷 187-188页

作者： Ertugrul Ercan Istemihan Tengiz Ugur Turk ferhat Ozyurtlu Emin Alioglu Department of Cardiology &mir University Yeni Girne Bulvari 1825 Sok. No.12 Karsiyaka lzmir Turkey Department qf Cardiology Central Hospital 1644 Sok. No:2 Bayrakli Izmir Turkey

Percutaneous closure of a prosthetic paravalvular leak （PVL） is a challenging procedure. Operators must use devices constructed for other applications. We present the use of a device which is specifically designed f... 详细信息

关键词： Device Paravalvular leak Percutaneous intervention Prosthetic valve

Spin symmetric solutions of Dirac equation with Pschl-Teller potential

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Chinese Physics B 2011年第7期20卷 52-56页

作者： ferhat Taskin Gkhan Koak Department of Physics Erciyes UniversityKayseri 38039Turkey

The approximate analytical solutions of the Dirac equation with the Poeschl-Teller potential is presented for arbitrary spin-orbit quantum number κ within the framework of the spin symmetry concept. The energy eigenvalues and the corresponding two Dirac spinors are obtained approximately in closed forms. The limiting cases of the energy eigenvalues and the two Dirac spinors are briefly discussed.

关键词： Dirac equation Poeschl-Teller potential spin symmetry

Microbial profile and antibiotic sensitivity pattern in bile cultures from endoscopic retrograde cholangiography patients

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World Journal of Gastroenterology 2012年第27期18卷 3585-3589页

作者： Muhsin Kaya Remzi Bestas Fatma Bacalan ferhat Bacaksz Esma Gülsun Arslan Mehmet Ali Kaplan Department of Gastroenterology School of MedicineDicle UniversityDiyarbakr 21280Turkey Department of Clinical Microbiology School of MedicineDicle UniversityDiyarbakr 21280Turkey Department of Internal Medicine School of MedicineDicle UniversityDiyarbakr 21280Turkey

AIM： To identify the frequency of bacterial growth, the most commonly grown bacteria and their antibiotic susceptibility, and risk factors for bacterial colonization in bile collected from patients with different biliary dis- eases. METHODS： This prospective study was conducted be- tween April 2010 and August 2011. Patients with vari- ous biliary disorders were included. Bile was aspirated by placing a single-use, 5F, standard sphincterotome catheter into the bile duct before the injection of con- trast agent during endoscopic retrograde cholangio- pancreaticography （ERCP）. Bile specimens were trans- ported to the microbiology laboratory in blood culture bottles within an anaerobic transport system. Bacteria were cultured and identified according to the standard protocol used in our clinical microbiology laboratory. The susceptibilities of the organisms recovered were identified using antimicrobial disks, chosen according tothe initial gram stain of the positive cultures RESULTS： Ninety-one patients （27% male, mean age 53.7 4- 17.5 years, range： 17-86 years） were included in the study. The main indication for ERCP was benign biliary disease in 79 patients and malignant disease in 12 patients. The bile culture was positive for bacterial growth in 46 out of 91 （50.5%） patients. The most frequently encountered organisms were Gram-negative bacteria including Escherich/a coli （28.2%）, Pseudo- monas （17.3%） and Stenotrophomonas rnaltophilia （15.2%）. There were no significant differences between patients with malignant and benign disease （58% vs 49%, P = 0.474）, patients with acute cholangitis and without acute cholangitis （52.9% vs 50%, P = 0.827）, patients who were empirically administered antibiotics before intervention and not administered （51.4% vs 60.7%, P = 0.384）, with regard to the bacteriobilia. We observed a large covering spectrum or low resistance to meropenem, amikacin and imipenem. CONCLUSION： We did not find a significant risk fac- tor for bacteriobilia in

关键词： Cholangitis Endoscopic retrograde cholan-giopancreaticography Bacteriobilia Bile culture

以天然沥青岩为原料制备高压缩强度的泡沫炭(英文)

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新型炭材料 2013年第2期28卷 127-133页

作者： Deniz Baran Mehmet ferhat Yardim Hüsnü Atakül Ekrem Ekinci AKSA Denizcah Koyu Yalova Turkey lstanbu Technical University Maslak 34469 Istanbul Turkey Tdinamik Energy Industry & Foreign Trade Co. Bulgurlu Uskudar 34696 lstanbul Turkey

以安纳托利亚东南部的天然沥青岩为原料制备泡沫炭。所制泡沫炭的平均孔径和密度分别为150μm和800 kg/m3。主要研究了压力、温度、泄压时间及在最高温度时的停留时间对泡沫形成的影响,同时还评价了炭化过程对泡沫结构的影响。主要研究... 详细信息

以安纳托利亚东南部的天然沥青岩为原料制备泡沫炭。所制泡沫炭的平均孔径和密度分别为150μm和800 kg/m3。主要研究了压力、温度、泄压时间及在最高温度时的停留时间对泡沫形成的影响,同时还评价了炭化过程对泡沫结构的影响。主要研究了压力、温度、泄压时间及在最高温度时的停留时间对泡沫炭进行了表征,并进行了密度及抗压强度分析。结果表明,1 323 K炭化后,泡沫炭压缩强度由10 MPa增加到18.7 MPa。沥青的灰分含量(41.76%)对泡沫炭的密度和压缩强度起重要作用。

关键词：泡沫炭沥青岩压缩强度

Simulation Topographical Surfaces Geographical and Geological Using Differential Geometry

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International Journal of Geosciences 2011年第4期2卷 689-694页

作者： Mohammedi ferhat Bensaada Said 不详

By applying differential geometry to analogue models developed such a model is calculated for the geometrical shape. Dip measurements are critical data for geologists, and in particular for structural studies. They enable quantifying geologic features observed across the surface in order to model the sub-surface. Dip measurements are provided by direct or indirect sources: geological maps, fieldwork data, Digital Elevation Model (DEM). This quantification then allows for comparison of such models to measured field data and supplants the use interferometry Radar describes and compares 3-D deformations. This example supplements and is based on the material found in L.S.S.I.T. Theory as well as some of the experimental results with the new method are delineated.

关键词： Structural Geology Topography Surfaces Differential Geometry Modeling Images Optically

Mechanical memory operations in piezotransistive GaN microcantilevers using Au nanoparticleenhanced photoacoustic excitation

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Microsystems & Nanoengineering 2022年第1期8卷 161-174页

作者： ferhat Bayram Durga Gajula Digangana Khan Goutam Koley Holcombe Department of Electrical and Computer Engineering Clemson UniversityClemsonSC 29634USA School of Electrical and Computer Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Nonlinear oscillations in micro-and nanoelectromechanical systems have emerged as an exciting research area in recent years due to their promise in realizing low-power,scalable,and reconfigurable mechanical memory and logic ***,we report ultralow-power mechanical memory operations utilizing the nonlinear oscillation regime of GaN microcantilevers with embedded piezotransistive AlGaN/GaN heterostructure field effect transistors as highly sensitive deflection *** between the high and low oscillatory states of the nonlinear oscillation regime was demonstrated using a novel phase-controlled opto-mechanical excitation setup,utilizing a piezo actuator and a pulsed laser as the primary and secondary excitation sources,***-based photoacoustic excitation was amplified through plasmonic absorption in Au nanoparticles deposited on a ***,the minimum switching energy required for reliable memory operations was reduced to less than a picojoule(pJ),which translates to one of the lowest ever reported,when normalized for mass.

关键词： excitation operations cantilever

Global Existence and Asymptotic Behavior for a Coupled System of Viscoelastic Wave Equations with a Delay Term

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Journal of Partial Differential Equations 2014年第4期27卷 293-317页

作者： ferhat Mohamed HAKEM Ali Department of Mathematics Oran University USTO 31000 ALGERIA. Computer Science Department Sidi Bel Abbes University 22000 ALGERIA.

We are interested in the study of a coupled system of viscoelastic wave equa- tions with a delay term. Firstly global existence of the solutions is proved. The asymp- totic behavior is obtained by using multiplier technique proved by A. Guessmia [1], however in the unstable set for certain initial data bolstered with some conditions, we obtain the blow up of the solutions for various sign of initial energy negative, positive or null. We use the same technique in [2] with a necessary modification imposed by our problem. This improves the earlier results in the literature

关键词： Global existence energy decay nonlinear damping

The Effects of Dimension Ratio and Horizon Length in the Micropolar Peridynamic Model

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Engineering（科研） 2011年第6期3卷 594-601页

作者： Y. ferhat I. Ozkol Istanbul Technical University Faculty of Aeronautics and Astronautics Aeronautical Eng. Dept

The aim of this study is to investigate the effects of horizon selection on the elastic behaviour of plate type structures in the micropolar peridynamic theory. Plates with various lengths and widths have been investi-gated using micropolar peridynamic model for different horizon selections. The mathematical model of plates has been provided applying the micropolar peridynamic theory and solution of this model has been obtained by finite element methods. The displacement fields have been computed for the different horizons and dimension ratios of plates. To compute the displacement field a program code has been developed by using the software package MATHEMATICA. The results obtained have been compared with the analytical solution of the classical elasticity theory and with the solution of displacement based finite element methods. For displacement based finite element method solution the software package ANSYS has been used. Ac-cording to results it has been observed that the displacement fields of the plates are strongly affected by ho-rizon selection. Therefore a question raises that which horizon length should be used with the problem in hand or is there any method to find the appropriate/best horizon length.

关键词： Peridynamics Micropolar Peridynamics Non-Local Continuum Mechanics Horizon