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Dynamic Responses of Block Type Quay Walls Under Cyclic Loading

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China Ocean Engineering 2021年第2期35卷 281-290页

作者： Hulya Karakus cihan Kubilay cihan Yuksel Project 06610 CankayaAnkaraTurkey Civil Engineering Department Hydraulics DivisionKırıkkale UniversityKırıkkaleTurkey

The purpose of this research is to study the dynamic responses of gravity quay walls with block type consisting of“three blocks”*** this purpose,1g shaking table tests were conducted under different cyclic loadings for two different saturated granular backfill materials(Soil 1 and Soil 2).In this study,D_(n50) of Soil 1 and Soil 2 are selected as 2.2 cm and 1.0 cm,*** the experiments,accelerations,soil pressures and displacements were measured for each *** results pointed out that Soil 2 caused more damage on *** measurements for displacement and tilting of each block were discussed in view of“acceptable level of damage in performance-based design”given in PIANC(2001).The result of the study showed that the definitions of damaged levels given in PIANC(2001)were reliable for using in performance-based methods for seismic design of block type quay walls.

关键词： block type quay walls 1g shaking table tests damage level dynamic response

The Effect of the Propeller Jet on Pile Groups

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China Ocean Engineering 2014年第1期28卷 17-30页

作者： Kubilay cihan Department of Civil Engineering Yildiz Technical University

The objective of this study is to determine the effect of jet propeller on the damage of berthing structures combined of armoured slope with pile groups. For this purpose, scour measurements were performed for four types berthing structures, which were armoured slope with tandem arrangements of piles for two and three piles and with side by side arrangements of piles for two and three piles. The effect of gap between piles on damage was investigated. The damage level induced by propeller jet between piles was determined. The gaps were 1, 2, 3, and 4 times the pile diameter. Three different values of Rpm （690, 820, and 950） were chosen for the tests. The diameter of circular piles is 40 mm. The slope ratio was 1/3 and the diameter of propeller was 10 cm.

关键词： erosion propeller jet, armoured slope pile groups

Epidemiology of pulmonary hypertension in the elderly

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Journal of Geriatric Cardiology 2017年第1期14卷 11-16页

作者： cihan Orem Departments of Cardiology Faculty of Medicine Karadeniz Technical University KTU Tip Fakultesi Kardiyoloji ABD Trabzon 61080 Turkey.

1 Introduction Pulmonary hypertension （PH） is a haemodynamic and pathophysiological condition defined as increase in mean pulmonary arterial pressure≥ 25 mmHg at rest as assessed by right heart catheterization （... 详细信息

关键词： Epidemiology Pulmonary hypertension The elderly

Advances in quantitative analysis of astrocytes using machine learning

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Neural Regeneration Research 2023年第2期18卷 313-314页

作者： Demetrio Labate cihan Kayasandik Department of Mathematics University of HoustonHoustonTXUSA Department of Computer Istanbul Medipol University IstanbulTurkey

Astrocytes,a subtype of glial cells,are star-shaped cells that are involved in the homeostasis and blood flow control of the central nervous system(CNS).They are known to provide structural and functional support to neurons,including the regulation of neuronal activation through extracellular ion concentrations,the regulation of energy dynamics in the brain through the transfer of lactate to neurons,and the modulation of synaptic transmission via the release of neurotransmitters such as glutamate and adenosine *** addition,astrocytes play a critical role in neuronal reconstruction after brain injury,including neurogenesis,synaptogenesis,angiogenesis,repair of the blood-brain barrier,and glial scar formation after traumatic brain injury(Zhou et al.,2020).

关键词： homeostasis astrocytes shaped

Analyses of energy use and greenhouse gas emissions(GHG)in watermelon production

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International Journal of Agricultural and Biological Engineering 2023年第5期16卷 221-225页

作者： cihan Demir Department of Mechanical and Metal Technologies Vocational School of Technical SciencesUniversity of KırklareliKırklareliTurkey

The aim of this research is to conduct an energy use efficiency and greenhouse gas(GHG)emission analysis in watermelon production that took place in Kırklareli Province of Turkey during the 2021 production *** research contains calculations of Energy use efficiency,specific energy,energy productivity and net energy,energy input types,GHG emissions and GHG ***,observation and data calculations are related to the 2021 production *** data used in the research were collected from 30 different(accessible)farms through face-to-face surveys with full count *** and EO were calculated as 15698.99 MJ/hm^(2)and 104784.91 MJ/hm^(2),*** relation to production inputs,24.29%of the energy inputs consisted of chemical fertilizers energy(3813.34 MJ/hm^(2)),20.04%consisted of transportation energy(3146.19 MJ/hm^(2)),10.63%consisted of diesel fuel energy(1668.52 MJ/hm^(2)),7.44%consisted of human labour energy(1168.09 MJ/hm^(2)),6.50%consisted of plant energy(1021.02 MJ/hm^(2)),5.76%consisted of electricity energy(904.50 MJ/hm^(2)),5.18%consisted of machinery energy(813.44 MJ/hm^(2)),3.36%consisted of irrigation water energy(527.63 MJ/hm^(2)),2.85%consisted of organic fertilizer energy(446.72 MJ/hm^(2)),2.40%consisted of farmyard manure energy(376.62 MJ/hm^(2))and 0.67%consisted of chemicals energy(105.67 MJ/hm^(2)).Energy use efficiency,specific energy,energy productivity and net energy were calculated as 6.67,0.28 MJ/kg,3.51 kg/MJ and 89085.91 MJ/hm^(2),*** utilized total energy input in production was grouped as 27.19%direct energy,72.81%indirect energy,22.55%renewable energy and 77.45%*** GHG emissions and GHG ratio were determined as 492.82 kg CO_(2)-eq/hm^(2),0.01 kg CO_(2)-eq/kg,respectively.

关键词： energy use GHG analysis GHG ratio Turkey watermelon

Prediction of wear loss quantities of ferro-alloy coating using different machine learning algorithms

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Friction 2020年第1期8卷 107-114页

作者： Osman ALTAY Turan GURGENC Mustafa ULAS cihan OZEL Software Engineering Firat UniversityElazig 23119Turkey Automotive Engineering Firat UniversityElazig 23119Turkey Mechanical Engineering Firat UniversityElazig 23119Turkey

In this study,experimental wear losses under different loads and sliding distances of AISI 1020 steel surfaces coated with(wt.%)50FeCrC‐20FeW‐30FeB and 70FeCrC‐30FeB powder mixtures by plasma transfer arc welding were *** dataset comprised 99 different wear amount measurements obtained experimentally in the *** linear regression(LR),support vector machine(SVM),and Gaussian process regression(GPR)algorithms are used for predicting wear quantities.A success rate of 0.93 was obtained from the LR algorithm and 0.96 from the SVM and GPR algorithms.

关键词： surface coating plasma transfer arc(PTA)welding wear prediction machine learning algorithms

An adult case of medulloblastoma in the cerebellopontine angle extending to the supratentorial area

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Neural Regeneration Research 2010年第21期5卷 1678-1680页

作者： Yasemin Benderli cihan Department of Radiation Oncology Kayseri Training and Research Hospital

Medulloblastoma is an undifferentiated embryonic neuroepithelial tumor. It is a rare tumor in the central nervous system, with an even rarer occurrence during adulthood. It may develop at an atypical and uncommon site, such as the cerebellopontine angle （CPA）, and such tumors rarely present with supratentorial extension. The present study reports an adult case of medulloblastoma in the CPA extending to the supratentorial area. The patient presented with complaints of headache, vertigo, hearing difficulty in the left ear, nausea/vomiting, and unsteady gait. Disequilibrium began 4 weeks earlier. Examination revealed normal cranial nerves, and computed tomography showed a hyperdense lesion, with a heterogeneously enhancing mass, in the left CPA region. The patient underwent a nearly total excision of the lesion in the CPA region. Histopathological examination confirmed medulloblastoma, WHO grade IV. Postoperatively, the patient received radiotherapy and remained asymptomatic for 30 months. However, he received two more surgeries for relapse and progression of medulloblastoma and eventually died. A CPA medulloblastoma with supratentorial extension is relatively rare in the clinic.

关键词： medulloblastoma adult cerebellopontine angle supratentorial extension

A new approach for prediction of the wear loss of PTA surface coatings using artificial neural network and basic,kernel-based,and weighted extreme learning machine

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Friction 2020年第6期8卷 1102-1116页

作者： Mustafa ULAS Osman ALTAY Turan GURGENC cihan OZEL Department of the Software Engineering Firat UniversityElazig 23119Turkey Department of the Automotive Engineering Firat UniversityElazig 23119Turkey Department of the Mechanical Engineering Firat UniversityElazig 23119Turkey

Wear tests are essential in the design of parts intended to work in environments that subject a part to high *** tests involve high cost and lengthy experiments,and require special test *** use of machine learning algorithms for wear loss quantity predictions is a potentially effective means to eliminate the disadvantages of experimental methods such as cost,labor,and *** this study,wear loss data of AISI 1020 steel coated by using a plasma transfer arc welding(PTAW)method with FeCrC,FeW,and FeB powders mixed in different ratios were obtained experimentally by some of the researchers in our *** mechanical properties of the coating layers were detected by microhardness measurements and dry sliding wear *** wear tests were performed at three different loads(19.62,39.24,and 58.86 N)over a sliding distance of 900 *** this study,models have been developed by using four different machine learning algorithms(an artificial neural network(ANN),extreme learning machine(ELM),kernel-based extreme learning machine(KELM),and weighted extreme learning machine(WELM))on the data set obtained from the wear test *** R2 value was calculated as 0.9729 in the model designed with WELM,which obtained the best performance among the models evaluated.

关键词： wear loss prediction surface coating plasma transferred arc welding artificial neural network extreme learning machine

Determination of energy use efficiency and greenhouse gas emissions in peach production

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International Journal of Agricultural and Biological Engineering 2023年第2期16卷 165-170页

作者： cihan Demir Osman Gokdogan Department of Mechanical and Metal Technologies Vocational School of Technical SciencesUniversity of KırklareliKırklareliTurkey Department of Agricultural Machinery and Technologies Engineering Faculty of AgricultureIsparta University of Applied SciencesIspartaTurkey

The purpose of this study was to determine the energy use efficiency and greenhouse gas(GHG)emissions in peach production that took place in Kırklareli province of Turkey during the 2020-2021 production *** study included calculations of energy input,energy output,energy use efficiency,specific energy,energy productivity,net energy,energy input types,GHG emissions and GHG ***,observation and data calculations are related to the 2020-2021 production *** data obtained from the study were collected from 16 different farms(reachable)through face-to-face surveys with full count *** input and energy output were calculated as 19570.58 MJ/hm^(2) and 19471.94 MJ/hm^(2),*** regards to production inputs,55.70% of the energy inputs consisted of chemical fertilizers energy(10900.03 MJ/hm^(2)),9.46% consisted of chemicals energy(1852.10 MJ/hm^(2)),9.32% consisted of human labour energy(1823.13 MJ/hm^(2)),7.65% consisted of electricity energy(1497.28 MJ/hm^(2)),6.91% consisted of diesel fuel energy(1351.52 MJ/hm^(2)),4.73% consisted of irrigation water energy(926.10 MJ/hm^(2)),3.43% consisted of machinery energy(671.98 MJ/hm^(2)),1.88% consisted of transportation energy(367.72 MJ/hm^(2)),0.88% consisted of farmyard manure energy(171.80 MJ/hm^(2))and 0.05%consisted of lime energy(8.94 MJ/hm^(2)).Energy use efficiency,specific energy,energy productivity and net energy were calculated as 0.99,1.91 MJ/kg,0.52 kg/MJ and-98.64 MJ/hm^(2),*** consumed total energy input in production was classified as 28.60% direct energy,71.40% indirect energy,14.93% renewable energy and 85.07% *** GHG emissions and GHG ratio were calculated as 1683.24 kgCO_(2)-eq/hm^(2) and 0.16 kg CO_(2)-eq/kg,respectively.

关键词： energy use efficiency greenhouse gas emissions greenhouse gas ratio peach Turkey