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Isolated dorsal approach for the treatment of neglected volar metacarpophalangeal joint dislocations

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World Journal of Orthopedics 2014年第1期5卷 62-66页

作者： Hakan Ba?ar Mustafa erkan ?nanmaz Kamil ?a?r? K?se Cihangir tetik Department of Orthopaedic and Traumatology Sakarya Training and Research Hospital Department of Orthopaedics and Traumatology Acibadem Maslak Hospital

Here, we present the clinical and radiological results of three neglected volar metacarpophalangeal dislocations in 2 patients, which were treated with open reductions 10 and 24 mo after the dislocations. There was a mean of a 20°(range 10°-30°) limitation of extension and a 53.3°(range 30°-70°) limitation of flexion preoperatively. Postoperatively, there was no limitation of extension(at 8 and 12 mo) in any of the fingers. In terms of flexion, one finger had full function, one had a 10° and the last one had a 30° limitation of flexion. Two of the fingers presented anesthesia preoperatively, which improved to hypesthesia postoperatively. One finger had hypesthesia, which improved postoperatively. During surgery, a ruptured dorsal capsule was found to have interposed into the joint, making closed reduction impossible. Our experience with these two patients demonstrated that, even in neglected cases, open reduction using an isolated dorsal approach may result in satisfactory clinical andradiological outcomes.

关键词： metacarpophalangeal dislocation Neglected dislocation Surgical treatment Dorsal surgical approach metacarpophalangeal dislocation rehabilitation

Enhancing the efficiency of cabin heaters in emergency shelters after earthquakes through an optimized fuzzy controller

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Building Simulation 2023年第9期16卷 1759-1776页

作者： erkan Duman Dila Seckin Computer Engineering Department Engineering FacultyFirat UniversityElazig 23119Turkey

In just one and half minutes,more than fifty thousand died due to the 7.7 and 7.6 magnitude earthquakes that struck Turkey’s southeast on February 6,2023;thousands of families who barely escaped struggled to survive in the freezing weather.A warm shelter was the most basic requirement of these *** buildings are a rapid and easy solution to this ***,there is a need for a more effective and safe heating option than a wood fire for these *** this study,cabin heaters,which allow truck drivers to warm up when they park their vehicles to sleep,are specially optimized for emergency shelters after an *** optimized fuzzy controller was developed to use in such buildings,which allows an air–fuel ratio in the combustion chamber of the cabin heater to be controlled adaptively based on system dynamics to get lower carbon emissions and fuel *** TRNSYS software was used to establish the transient simulation model of a cabin heater with a capacity of 4 kW for a typical 21 m^(2) shelter building in Turkey’s cold *** developed fuzzy controller carried out the heating process of this shelter from the 15th of November to the 15th of *** of using expert knowledge,the Gray Wolf Optimization(GWO)method was applied to optimize the fuzzy controller parameters developed for the cabin *** the optimized fuzzy controller,the fuel consumption at the end of the heating season was reduced by an average of 0.2 L/h,and the cabin heater’s efficiency increased by more than 13%.Our simulation results show that the intelligent controller we developed could improve diesel fuel combustion efficiency by up to 85%.

关键词： parking heater cabin heater emergency shelters fuzzy controller gray wolf optimization TRNSYS simulation

Palliation of malignant esophageal obstruction and fistulas with self expandable metallic stents

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World Journal of Gastroenterology 2010年第45期16卷 5739-5745页

作者： Ahmet Dobrucali erkan Caglar Division of Gastroenterology Department of Internal MedicineCerrahpasa Medical FacultyIstanbul UniversityIstanbul 34300Turkey

AIM: To evaluate the efficacy of self expandable metallic stents (SEMS) in patients with malignant esophageal obstruction and fistulas. METHODS: SEMS were implanted in the presence of fluoroscopic guidance in patients suffering from advanced and non-resectable esophageal, cardiac and invasive lung cancer between 2002 and 2009. All procedures were performed under conscious sedation. All patients had esophagus obstruction and/or fistula. In all patients who required reintervention, recurrence of dysphagia, hemorrhage, and fistula formation were indications for further endoscopy. Patients' files were scanned retrospectively and the obtained data were analyzed using SPSS 13.0 for Windows. The χ 2 test was used for categorical data and was analysis of variance for noncategorical data. Patients' long-term survival was assessed using the Kaplan-Meier method. RESULTS: Stents were successfully implanted in 90 patients using fluoroscopic guidance. Reasons for stent implantation in these patients were esophageal stricture (77/90, 85.5%), external pressure (8/90, 8.8%) and tracheo-esophageal fistula (5/90, 5.5%). Dysphagia scores (mean ± SD) were 3.37 ± 0.52 before and 0.90 ± 0.43 after stent implantation (P = 0.002). Intermittent, nonmassive hemorrhage due to the erosion caused by the distal end of the stent in the stomach occurred in only one patient who received implementation at cardioesophageal junction. Mean survival following stenting was 134.14 d (95% confidence interval: 94.06-174.21).CONCLUSION: SEMS placement is safe and effective in the palliation of dysphagia in selected patients with malignant esophageal strictures.

关键词： Esophagus cancer Stenosis Stents Complication Dysphagia

A New Metaheuristic Approach to Solving Benchmark Problems: Hybrid Salp Swarm Jaya Algorithm

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Computers, Materials & Continua 2022年第5期71卷 2923-2941页

作者： erkan Erdemir Adem Alpaslan Altun Department of Information Technologies Tokat Vocational and Technical Anatolian High SchoolMerkez/Tokat60030Turkey Department of Computer Engineering Faculty of TechnologyKonya Selcuk UniversitySelcuklu/Konya42130Turkey

Metaheuristic algorithms are one of the methods used to solve optimization problems and find global or close to optimal solutions at a reasonable computational *** with other types of algorithms,in metaheuristic algorithms,one of the methods used to improve performance and achieve results closer to the target result is the hybridization of *** this study,a hybrid algorithm(HSSJAYA)consisting of salp swarm algorithm(SSA)and jaya algorithm(JAYA)is *** speed of achieving the global optimum of SSA,its simplicity,easy hybridization and JAYA’s success in achieving the best solution have given us the idea of creating a powerful hybrid algorithm from these two *** hybrid algorithm is based on SSA’s leader and follower salp system and JAYA’s best and worst solution *** works according to the best and worst food source *** this way,it is thought that the leader-follower salps will find the best solution to reach the food *** hybrid algorithm has been tested in 14 unimodal and 21 multimodal benchmark *** results were compared with SSA,JAYA,cuckoo search algorithm(CS),firefly algorithm(FFA)and genetic algorithm(GA).As a result,a hybrid algorithm that provided results closer to the desired fitness value in benchmark functions was *** addition,these results were statistically compared using wilcoxon rank sum test with other *** to the statistical results obtained from the results of the benchmark functions,it was determined that HSSJAYA creates a statistically significant difference in most of the problems compared to other algorithms.

关键词： Metaheuristic optimization benchmark algorithm swarm hybrid

Illumination of parameter contributions on uneven break： phenomenon in underground stoping mines

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International Journal of Mining Science and Technology 2016年第6期26卷 1095-1100页

作者： Jang Hyongdoo Topal erkan Kawamura Youhei Department of Mining Engineering and Metallurgical Engineering Western Australian School of Mines Curtin University Perth 6102 Australia Division of Intelligent Interaction Technologies Faculty of Engineering Information and Systems University of Tsukuba Tsukuba 3058555 Japan

One of the most serious conundrum facing the stope production in underground metalliferous mining is uneven break （UB： unplanned dilution and ore-loss）. Although the UB has a huge economic fallout to the entire mining process, it is practically unavoidable due to the complex causing mechanism. In this study, the contribution of ten major UB causative parameters ha,; been scrutinised based on a published UB predicting artificial neuron network （ANN） model to put UB under the engineering management. Two typical ANN sensitivity analysis methods, i.e., connection weight algorithm （CWA） and profile method （PM） have been applied. As a result of CWA and PM applications, adjusted Qrate （AQ） revealed as the most influential parameter to UB with contribution of 22,40% in CWA and 20,48% in PM respectively. The findings of this study can be used as an important reference in stope design, production, and reconciliation stages on underground stoping mine.

关键词： Unplanned dilution Ore-loss Underground metalliferous mining Uneven break Artificial neuron network

A State-Based Peridynamic Formulation for Functionally Graded Euler-Bernoulli Beams

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Computer Modeling in Engineering & Sciences 2020年第8期124卷 527-544页

作者： Zhenghao Yang erkan Oterkus Selda Oterkus PeriDynamics Research Centre Department of Naval ArchitectureOcean and Marine EngineeringUniversity of StrathclydeGlasgowG40LZUK

In this study,a new state-based peridynamic formulation is developed for functionally graded Euler-Bernoulli *** equation of motion is developed by using Lagrange’s equation and Taylor *** axial and transverse displacements are taken into account as degrees of *** different boundary conditions are considered including pinned support-roller support,pinned support-pinned support,clamped-clamped and *** results are compared against finite element analysis results for transverse and axial deformations and a very good agreement is observed for all different types of boundary conditions.

关键词： Peridynamics Euler-Bernoulli beam functionally graded state-based

Ti3C2Tx MXene-functionalized Hydroxyapatite/Halloysite nanotube filled poly-(lactic acid)coatings on magnesium:In vitro and antibacterial applications

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Journal of Magnesium and Alloys 2024年第9期12卷 3758-3771页

作者： Mehmet Topuz Yuksel Akinay erkan Karatas Tayfun Cetin Department of Mechanical Engineering Van Yuzuncu Yil UniversityVan 65080Turkey Department of Mining Engineering Van Yuzuncu Yil UniversityVan65080Turkey Department of Molecular Biology and Genetics Erzurum Technical UniversityErzurum 25100Turkey Yuksekova Vocational High School Hakkari UniversityHakkari 30110Turkey

Magnesium(Mg)stands out in temporary biomaterial applications due to its biocompatibility,biodegradability,and low Young’s ***,controlling its corrosion through next-generation polymer-based functional coatings is crucial due to the rapid degradation behavior of *** this study,the function of 2D lamellar Ti_(3)C_(2)T_(x)(MXene)in Hydroxyapatite(HA)and Halloysite nanotube(HNT)hybrid coatings in biodegradable poly-(lactic acid)(PLA)was *** morphological and structural characterizations of the coatings on Mg were revealed through HRTEM,XPS,SEM-EDX,XRD,FTIR,and contact angle analyses/*** in vitro corrosion tests(OCP,PDS,and EIS-Nyquist)were conducted for evaluate corrosion resistance under simulated body fluid(SBF)*** bioactivity of the coatings in SBF have been revealed in accordance with the ISO 23,317 ***,antibacterial disk diffusion tests were conducted to investigate the functional effect of MXene in *** has been determined that the presence of MXene in the coating increased not only surface wettability(131°,85°,77°,and 74°for uncoated,pH,PHH,and PHH/MXene coatings,respectively)but also increased corrosion resistance(1857.850,42.357,1.593,and 0.085×10^(-6),A/cm^(2) for uncoated,pH,PHH,and PHH/MXene coatings,respectively).It has been proven that the in vitro bioactivity of PLA-HA coatings is further enhanced by adding HNT and MXene,along with SEM morphologies after ***,2D lamellar MXene-filled coating exhibits antibacterial behavior against both *** and *** bacteria.

关键词： Magnesium Pla coating Ti3c2tx mxene In-vitro bioactivity Disk diffusion

Anatomic and functional results of idiopathic macular epiretinal membrane surgery

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International Journal of Ophthalmology(English edition) 2020年第4期13卷 614-619页

作者： Mehmet Ozgur Cubuk erkan Unsal Department of Ophthalmology Istanbul Research and Education HospitalIstanbul 34025Turkey

AIM: To assess the impact of macular surgery on the functional and anatomic outcomes in patients with grade 2 epiretinal membrane(ERM), and the effect of internal limiting membrane(ILM) peeling on visual acuity and to analyze the long-term effect of pars plana vitrectomy(PPV) on intraocular pressure(IOP).METHODS: Pseudophakic eyes(62 eyes) diagnosed as idiopathic grade 2 ERM with at least 6 mo postoperative follow-up were included in this retrospective study. The fellow eye was nonvitrectomized. Patients were divided into two groups: group 1(29 eyes) treated with ERM and ILM peeling and group 2(33 eyes) with only ERM peeling. Preoperative and postoperative best corrected visual acuity(BCVA), slit-lamp, and a dilated fundus examination was performed. IOP was measured with Goldman applanation tonometer before, day 1 and first week and each visit after surgery. The incidence of significant IOP elevation was compared between vitrectomized eyes and nonvitrectomized fellow ***: Visual improvement was statistically significant and similar in both groups(P=0.008 in group 1, P=0.002 in group 2, P=0.09 inter-group). The amount of decrease in central macular thickness was statistically significant and similar in both groups(P=0.005 group 1, P=0.008 group 2, P=0.37 intergroup). At the final follow-up(14.1±9.6 mo) the incidence of significant IOP elevation was 4% in vitrectomized eyes(three eyes) and 3%(two eyes) in the nonvitrectomized fellow eyes(P=0.12). Four eyes(12.1%) had recurrent ERM after a mean follow-up of 8.6±1.1 mo in group 2, there was no recurrence in group 1(P=0.01).CONCLUSION: Recurrence of ERM may be decreased by ILM peeling during ERM surgery. However, it seems that ILM peeling do not affect the functional outcome and 23-gauge PPV alone do not have a significant effect on IOP.

关键词： epiretinal membrane internal limiting membrane peeling pars plana vitrectomy intraocular pressure

The Way Forward with Historic Urban Landscape Approach Towards Sustainable Urban Development

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Built Heritage 2018年第4期2卷 82-89页

作者： Yonca erkan Faculty of Art and Design Kadir Has UniversityIstanbulTurkey

The pace of urbanisation,with the increase in the number of metropolitan areas,has been paralleled with the heritage discourse of past generations that valorises monuments in isolation,and has pushed the appreciation of urban heritage to a grim corner in the face of *** the turn of the millennium there are international efforts to reverse this trend by placing culture and people-centred approaches into the heritage discourse in order to allow inclusive policies that see culture and cultural heritage as an asset and driving force for sustainable urban *** one of such instruments,the UNESCO Recommendation on the Historic Urban Landscape,as an integrated management model,is considered in this article to have potentials to bridge existing divides to achieve sustainable urban *** this belief,the paper looks into the future,with supporting arguments that come from discussions as a result of the WHITRAP International Expert Meeting on the Implementation of the HUL approach which took place in 2018,Shanghai,China.

关键词： Historic Urban Landscape approach civic engagement urban heritage people-centred culture sustainable development