세계 M&A 시장 새 강자로 떠오른 인도 ; 인도 기업들이 해외 M&A에서 두각을 나타내는 이유 -풍부한 자본조달, 높은 기업평가, 강한 협상기술 이점-

Harish H. V. 포스코경영연구원 2007 CHINDIA Plus Vol.8 No.-

Effect of clay as deleterious material on properties of normal-strength concrete

Harish R. Choudhary,Saha Dauji,Arham Siddiqui 아시아콘크리트학회 2020 Journal of Asian Concrete Federation Vol.6 No.1

Sustainability concerns prompted use of crushed aggregates in concrete, wherein deleterious materials might get inadvertently included. Some deleterious materials are allowed up to limiting values by most standards, which, however, are silent about the quantification of their effects on properties of concrete – which would be site specific. For an important Indian infrastructure, this study quantifies effects of clay fines as deleterious material in concrete, on workability (slump) and strength (cube compression; split tensile; flexural tensile tests) around the limit (1% of fine aggregates by weight) stipulated by the Indian standard. The novelty of the study is that, contrary to the literature in this domain, the effects are studied without alteration of the mix proportions – a different practical scenario. The limit of clay fines in concrete allowed by Indian standard was found to be adequate considering strength parameters, but for maintaining target workability, the limit would be revised to 0.5% of the fine aggregates. Generally, the variations of concrete properties with the increasing clay fines were: (1) the workability and split tensile strength reduced monotonically, in non-linear fashion; (2) compressive strength (beyond 7 days) and the flexural tensile strength (modulus of rupture) reduced monotonically in linear manner.

Effect of nano additives (titanium and zirconium oxides) and diethyl ether on biodiesel-ethanol fuelled CI engine

Harish Venu,Venkataramanan Madhavan 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.5

The present work is dedicated to the comparative experimental study of biodiesel-ethanol blends in a compression ignition engine using TiO 2 (Titanium oxide) nanoparticle, ZrO 2 (Zirconium oxide) nanoparticle and DEE (Diethyl ether) additives. The test fuels used are a blend of biodiesel (80%) -ethanol (20%) (denoted as BE), a blend of BE with 25ppm Titanium oxide nanoparticle (denoted as BE-Ti), a blend of BE with 25ppm Zirconium oxide nanoparticle (denoted as BE-Zr) and a blend of BE with 50 ml Diethyl ether (denoted as BEDEE). Addition of nanoparticles increases the oxidation rate, reduces the light-off temperature and creates large contact surface area with the base fuel thereby enhancing the combustion with minimal emissions. Experimental results shown that addition of Titanium nanoparticles increased NOx, HC and smoke with lowered BSFC and CO. Whereas addition of Zirconium nanoparticles increases BSFC and HC emissions with lowered CO, CO 2 and smoke emissions in comparison with BE blends. DEE addition to BE blends improved the heat release rate and increased HC, CO emissions were observed with lowered BSFC, NOx and smoke. Simultaneous reduction of NOx and smoke indicates the effect of DEE on Low temperature combustion (LTC).

Antioxidant Potentials of Skin, Pulp, and Seed Fractions of Commercially Important Tomato Cultivars

Harish Mani Chandra,Sathishkumar Ramalingam 한국식품과학회 2011 Food Science and Biotechnology Vol.20 No.1

The rationale of this study is to compare the levels of different antioxidants present in commercially important tomato cultivars of India, specifically developed to grow in high altitude and plain regions. Major antioxidant components like lycopene, ascorbic acid, phenolics, and quenching capacity of free radicals were analysed in different fractions of tomato fruit, i.e., skin, pulp, and seed fractions. Significant differences in antioxidant components were observed among the fractions of the different cultivars studied. Lycopene content was found to be more in high altitude cultivars (‘Sindhu’ and ‘Shalimar’); however,ascorbic acid and phenolic content were found to be higher in plain region cultivars (‘PKM1’ and ‘CO3’). To evaluate the antioxidant capacity, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing/antioxidant power (FRAP)assays were performed. High altitude cultivars showed 10-15% higher DPPH free radical scavenging activity and 20-30% increase in FRAP than the plain region cultivars. Among the different fruit fractions analysed, skin showed the highest level of antioxidants levels and free radical scavenging activities in all the cultivars tested. The difference in the antioxidants level and activity may be attributed to the genetic variability of the cultivars.

Effect of diethyl ether and Al2O3 nano additives in diesel-biodiesel-ethanol blends: Performance, combustion and emission characteristics

Harish Venu,Venkataramanan Madhavan 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.1

The present experimental work is focused on improving the performance and emission characteristics of biofuel blend (diesel (40 %)-biodiesel (40 %)-ethanol (20 %)) (denoted as BE). Comparative analysis was done for addition of Diethyl ether (DEE) and alumina nanoparticle (Al 2 O 3 ) at various concentrations. The test fuels used are BE, BE with 25 ppm Al 2 O 3 (denoted as BN-1), BE with 50 ppm Al 2 O 3(denoted as BN-2), BE with 5 % DEE (denoted as BE-1) and BE with 10 % DEE (denoted as BE-2). Experimental results indicate that, DEE addition in BE results in increased HC (Hydrocarbon), CO (Carbon monoxide), CO 2 (Carbon dioxide) and BSFC (Brake specific fuel consumption) with lowered NOx (Oxides of nitrogen) and smoke emission. This is attributed to high latent heat evaporation of mixture and Low temperature combustion (LTC). Al 2 O 3 addition in BE resulted in increase in NOx and smoke with lowered HC, CO, CO 2and BSFC. This could be attributed to enhanced surface area to volume ratio of mixture during rapid combustion process, higher catalytic combustion and reduced evaporation. At higher engine loads, the peak pressure of BE-1 is highest and that of BE-2 is lowest. Peak heat release rate of BE is highest and BN-1 is lowest. BE blends with additives (Al 2 O 3 and DEE) resulted in higher Particulate matter (PM) formation, however BN-1 blend showed lowered PM at engine loads of 75 % and 100 %. Overall, BE-1 and BN-1 reflects better engine performance, combustion and emission characteristics.

A novel generalized parametric directed divergence measure of intuitionistic fuzzy sets with its application

Harish Garg,Nikunj Aggarwal,Alka Tripathi 원광대학교 기초자연과학연구소 2017 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.13 No.6

The theme of this work is to investigate a new generalized parametric directed divergence measure for intuitionistic fuzzy sets. For it, the entire paper is divided into two folds. Firstly, a new measure has been presented by incorporating the idea of convex linear combinations of the degree of their membership functions. Some desirable properties of the proposed measure have been also investigated. Secondly, divergence measure based method for solving the decision making problem has been presented. A ranking of the different attributes is based on the proposed generalized divergence measure and the sensitivity analysis on the ranking of the system has been done based on the decision-making parameters. An illustrative examples have been studied to show that the proposed function is more reasonable in the decision-making process than other existing functions.

Electrochemical oxidation-reduction and determination of urea at enzyme free PPY-GO electrode

Harish Mudila,Parteek Prasher,Sweta Rana,Beena Khati,M.G.H. Zaidi 한국탄소학회 2018 Carbon Letters Vol.26 No.-

This manuscript explains the effective determination of urea by redox cyclic voltammetric analysis, for which a modified polypyrrole-graphene oxide (PPY-GO, GO 20% w/w of PPY) nanocomposite electrode was developed. Cyclic voltammetry measurements revealed an effective electron transfer in 0.1 M KOH electrolytic solution in the potential window range of 0 to 0.6 V. This PPY-GO modified electrode exhibited a moderate electrocatalytic effect towards urea oxidation, thereby allowing its determination in an electrolytic solution. The linear dependence of the current vs. urea concentration was reached using square-wave voltammetry in the concentration range of urea between 0.5 to 3.0 μM with a relatively low limit of detection of 0.27 μM. The scanning electron microscopy was used to characterize the morphologies and properties of the nanocomposite layer, along with Fourier transform infrared spectroscopy. The results indicated that the nanocomposite film modified electrode exhibited a synergistic effect, including high conductivity, a fast electron-transfer rate, and an inherent catalytic ability.

Effective adsorption of lead and copper from aqueous solution by samaneasaman and banana stem

Harish, Narayana,Janardhan, Prashanth,Sangami, Sanjeev Techno-Press 2018 Advances in environmental research Vol.7 No.3

The sorption of metal ions with low-cost adsorbents plays an important role in sustainable development. In the present study, the efficacy of sugarcane bagasse, rain tree fruits (samaneasaman), banana stem and their mixtures, used as bio-sorbents, in the removal of Cu(II) and Pb(II) ions from aqueous solution is evaluated. Batch studies are conducted, and residual ions were measured using Inductively Coupled Plasma (ICP)-atomic spectrometer. Effect of pH, initial metal ion concentration, reaction time and adsorbent dosage are studied. The Pb(II) removal efficiency was observed to be 97.88%, 98.60% and 91.74% for rain tree fruits, banana stem and a mixture of adsorbents respectively. The highest Cu(II) ion removal was observed for sugarcane bagasse sorbent with an efficiency of 82.10% with a pH of 4.5 and a reaction time of 90 min. Finally, desorption studies were carried out to study the leaching potential of adsorbent, and it was found that the adsorbent is stable in water than the other leaching agents such as HCl, ammonium acetate, Sodium EDTA. Hence, these adsorbents can be effectively used for the removal of these heavy metals.

Comparative electrochemical study of sulphonated polysulphone binded graphene oxide supercapacitor in two electrolytes

Harish Mudila,M.G.H. Zaidi,Sweta Rana,S. Alam 한국탄소학회 2016 Carbon Letters Vol.18 No.-

Sulphonated polysulphone (SPS) has been synthesized and subsequently applied as binder for graphene oxide (GO)-based electrodes for development of electrochemical supercapacitors. Electrochemical performance of the electrode was investigated using cyclic voltammetry in 1M Na2SO4 and 1M KOH solution. The fabricated supercapacitors gave a specific capacitance of 161.6 and 216.8 F/g with 215.4 W/kg and 450 W/kg of power density, in 1M Na2SO4 and 1M KOH solutions, respectively. This suggests that KOH is a better electrolyte than Na2SO4 for studying the electrochemical behavior of electroactive material, and also suggests SPS is a good binder for fabrication of a GO based electrode.

Preparation and Characterization of Molecular Sieving Carbon by Methane and Benzene Cracking over Activated Carbon Shperes

Harish Chandra Joshi,Rajesh Kumar,Rohitashaw Kumar Singh,Darshan Lal 한국탄소학회 2007 Carbon Letters Vol.8 No.1

Molecular sieving carbon (MSC) for separating O2-N2 and CO2-CH4 has been prepared through chemical vapor deposition(CVD) of methane and benzene on activated carbon spheres (ACS) derived from polystyrene sulfonate beads. The validity ofthe material for assesment of molecular sieving behavior for O2-N2 and CO2-CH4 pair of gases was assessed by the kineticadsorption of the corresponding gases at 25oC. It was observed that methane cracking on ACS lead to deposition of carbonmostly in whole length of pores rather than in pore entrance, resulting in a reduction in adsorption capacity. MSC showinggood selectivity for CO2-CH4 and O2-N2 separation was obtained through benzene cracking on ACS with benzene entrantmentof 0.40×104 g/ml at cracking temperature of 725oC for a period of 90 minutes resulting in a selectivity of 3.31:1.00 for O2-N2and 8.00:1.00 for CO2-CH4 pair of gases respectively.