نتایج جستجو برای: فرآیند ecap
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Submit Manuscript | http://medcraveonline.com Abbreviations: CI, Cochlear implant; OR, Operating room; EI, electrode impedance; ECAP, electrically evoked compound action potential; SOE, spread of excitation; CT, computed tomography; DSP, digital signal processing; RF, radiofrequency transmitter; PC, personal computer; IR, Intra-operative; ESRTs, Electrical stapedil reflex thresholds, ECoh G, El...
Equal Channel Angular Pressing (ECAP) is currently one of the most popular methods for fabricating Ultra-Fine Grained (UFG) materials. In this study, mechanical properties of the 60-40 two phase brass processed were evaluated by ECAP. The samples were repeatedly ECAP-ed to strains as high as 2 at a temperature of 350 ◦C using route C. The microstructure of the samples showed that small grains w...
در این مقاله، تاثیر فرایند پرس با کانال های همسان زاویه دار (ecap1) بر ساختار و خواص مکانیکی آلیاژ am30 منیزیم مورد مطالعه قرار گرفته است. نتایج، تأثیر قابل توجه فرایند ecap را در ایجاد ساختار ریز دانه نشان می دهد. تصاویر میکروسکوپ الکترونی روبشی نشان داد که اندازه دانه ها از 4/20 میکرومتردر حالت اکسترود شده به 2/7 میکرومتردر پاس اول و 9/3 میکرومتردر پاس چهارم کاهش یافت. نتایج پاس چهارم افزایش ...
In this study, single pass rolling (SPR) with varied reductions was conducted on pre-homogenized AZ91 alloys (H alloys) and ECAP-processed (HE alloys). The effects of reduction the microstructures mechanical properties HR (pre-homogenized rolled) HER (ECAP-processed were investigated. results showed that possessed much finer superior than alloys, which significantly influenced by reduction. bec...
BACKGROUND Hyperhomocysteinemia is a cardiovascular disease (CVD) risk factor. We determined plasma homocysteine (Hcy) reference values at optimized vitamin status and investigated their influence on the prevalence of hyperhomocysteinemia in healthy adults. Results were compared with those obtained using European Concerted Action Project (ECAP) cutoff values. METHODS Healthy adults (n = 101) ...
Naively one might have expected an early division between phosphate monoesterases and diesterases of the alkaline phosphatase (AP) superfamily. On the contrary, prior results and our structural and biochemical analyses of phosphate monoesterase PafA, from Chryseobacterium meningosepticum, indicate similarities to a superfamily phosphate diesterase [Xanthomonas citri nucleotide pyrophosphatase/p...
Nowadays, equal channel angular pressing, known as the ECAP process, is one of the most popular methods for manufacturing ultra-fine grained (UFG) materials. In this paper, Ecap process has been carried out on pure copper and 6012 aluminum alloy up to six passes by route . Principal attention was paid to the influence of parameters such as diameter, material, and the height of billet on mechani...
OBJECTIVE To compare temporal aspects of peripheral neural responses and central auditory perception between groups of younger adult and elderly cochlear implant users. STUDY DESIGN Cohort study. SETTING Academic hospital and cochlear implant center. PATIENTS Adult cochlear implant users aged 28 to 57 years in the younger group (n = 5) and 61 to 89 years (n = 9) in the elderly group. All ...
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