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- 저자 : Dharmadhikari (검색결과 4 건)
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Compelling therapy of LVH: straight (and not-so-straight) inferences from evidence
Ravi Tejraj Mehta,Anil Pareek,Shruti Dharmadhikari 대한고혈압학회 2020 Clinical Hypertension Vol.26 No.1
We have read with interest the Korean Society of Hypertension guidelines for the management of hypertension and congratulate the Society for an extensive review of literature while drafting the guidelines. The guidelines indicate preferring ACE-I and CCB over diuretics in patients with left ventricle hypertrophy. However, in landmark head-to-head comparison trials, the thiazide-like diuretic chlorthalidone has been shown to be superior to ACE-I and CCB in decreasing left ventricle mass and preventing heart failure in hypertensive patients. Also, we put forth the paradoxical finding that mere regression of LVH may not always translate into reduction in risk of HF; and that the pleiotropic effects of chlorthalidone may be the explanation behind its beneficial action in HF.
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Optimization of GMAW Process Parameters to Improve the Length of Penetration in EN 10025 S 235 Grade
Deshpande, M.U.,Kshirsagar, J.M.,Dharmadhikari, Dr. H.M. The Korean Welding and Joining Society 2017 대한용접·접합학회지 Vol.35 No.1
In auto ancillary fabrication industry, GMAW is a very useful & important welding process and EN10025 S 235 Grade is common material used for manufacturing of two wheeler chassis. This research gives the detail influence of welding process parameters such as welding current, welding voltage, wire speed on the penetration in EN10025 S 235 Grade mild steel material. The experimentation of this research has been carried out by using three factors, three level Taguchi DOE method. To analyze & optimize the welding parameters & characteristics, analysis of variance, L9 orthogonal array & signal to noise ratio are used. Length of Penetration in addition to the depth of penetration is major concern in fillet welded joints, as the penetration decides the strength of the welded joint. After analysis of penetration in all 9 welded samples, optimize parameters readings verified & found probability value within 0.05.From this research it is come to know that welding current & welding voltage is major parameters which affects the penetration in welded joints.
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Sadhu Kolekar,Shashikant P. Patole,Ji‑Beom Yoo,Chandrakant V. Dharmadhikari 대한금속·재료학회 2018 ELECTRONIC MATERIALS LETTERS Vol.14 No.2
Field emission from nanostructured films is known to be dominated by only small number of localized spots which varieswith the voltage, electric field and heat treatment. It is important to develop processing methods which will produce stableand uniform emitting sites. In this paper we report a novel approach which involves analysis of Proximity Field EmissionMicroscopic (PFEM) images using Scanning Probe Image Processing technique. Vertically aligned carbon nanotube emittershave been deposited on tungsten foil by water assisted chemical vapor deposition. Prior to the field electron emission studies,these films were characterized by scanning electron microscopy, transmission electron microscopy, and Atomic ForceMicroscopy (AFM). AFM images of the samples show bristle like structure, the size of bristle varying from 80 to 300 nm. The topography images were found to exhibit strong correlation with current images. Current–Voltage (I–V) measurementsboth from Scanning Tunneling Microscopy and Conducting-AFM mode suggest that electron transport mechanism in imagingvertically grown CNTs is ballistic rather than usual tunneling or field emission with a junction resistance of ~10 kΩ. It wasfound that I–V curves for field emission mode in PFEM geometry vary initially with number of I–V cycles until reproducibleI–V curves are obtained. Even for reasonably stable I–V behavior the number of spots was found to increase with the voltageleading to a modified Fowler–Nordheim (F–N) behavior. A plot of ln(I/V3) versus 1/V was found to be linear. Currentversus time data exhibit large fluctuation with the power spectral density obeying 1/f2 law. It is suggested that an analogueof F–N equation of the form ln(I/Vα) versus 1/V may be used for the analysis of field emission data, where α may depend onnanostructure configuration and can be determined from the dependence of emitting spots on the voltage.
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Optimization of GMAW Process Parameters to Improve the Length of Penetration in EN 10025 S 235 Grade
M. U. Deshpande,J. M. Kshirsagar,H. M. Dharmadhikari 대한용접·접합학회 2017 대한용접·접합학회지 Vol.35 No.1
In auto ancillary fabrication industry, GMAW is a very useful & important welding process and EN10025 S 235 Grade is common material used for manufacturing of two wheeler chassis. This research gives the detail influence of welding process parameters such as welding current, welding voltage, wire speed on the penetration in EN10025 S 235 Grade mild steel material. The experimentation of this research has been carried out by using three factors, three level Taguchi DOE method. To analyze & optimize the welding parameters & characteristics, analysis of variance, L9 orthogonal array & signal to noise ratio are used. Length of Penetration in addition to the depth of penetration is major concern in fillet welded joints, as the penetration decides the strength of the welded joint. After analysis of penetration in all 9 welded samples, optimize parameters readings verified & found probability value within 0.05.From this research it is come to know that welding current & welding voltage is major parameters which affects the penetration in welded joints.
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