R. C. Jain

Electrical Research and Development Association | ERDA · Technical Development Centre

The effect of variations in the input voltage and in the temperature of electrical components of a domestic microwave oven are discussed. The methods used to achieve uniform heating in a microwave oven are described. This is followed by a discussion on the dielectric and microwave heating properties of a special category of high loss materials whic...

Various existing, emerging and proposed applications of microwave energy are given. The need for measurements to estimate the permittivity of a dielectric material in the absence of a simple and well established microscopic theory is briefly discussed. Most dielectric measurement methods used in the frequency range from 100 MHz to 10 GHz are descri...

Entropy, relative entropy and mutual information which are three fundamental quantities in information theory are discussed. The difference between entropy of an information source and thermodynamic entropy is given. The meaning of the term information source is discussed in detail. Two applications of information theory: data compression and data...

The broadcast technology is undergoing a phenomenal change in recent times. The advent of digital technology, with possibility of non-linear editing, virtual studios, disk-based storage, signal processing, multichannel transmission, multiple delivery systems, etc points to a very fascinating era. Research is also ongoing to devise a consumer receip...

Multilevel association rules provide the more precise and specific information. Apriori algorithm is an established algorithm for finding association rules. Fast Apriori implementation is modified to develop new algorithm for finding frequent item sets and mining multilevel association rules. MAFIA is another established algorithm for finding frequ...

Organophilic nanoclay that was prepared by surface modification of Montmorillonite clay with quaternary ammonium compound was further treated with a surface modifier (silane). Subsequently, different composites were obtained by blending 5 wt % of clay, nanoclay, or silane-treated nanoclay with high-density polyethylene (HDPE) using Brabender Plasti...

Multilevel association rules explore the concept hierarchy at multiple levels which provides more specific information. Apriori algorithm explores the single level association rules. Many implementations are available of Apriori algorithm. Fast Apriori implementation is modified to develop new algorithm for finding multilevel association rules. In...

The copolymers of acrylamide–maleic anhydride and acrylamide–diallyl dimethyl ammonium chloride of different ionicities were used for the removal of color, solids, etc., from effluent generated from textile industry. The studies have been carried out to remove color generated in the effluent. To estimate dye content, we prepared standard curve usin...

The copolymers of functionalized polydimethylsiloxane (PDMS) and epoxy resin were prepared by varying the concentration of PDMS with an objective to produce the products with high performance properties. These copolymers were cured using polyamide as curing agent and characterized by FT-IR. The thermal properties and completion of curing were check...

Different Medium access control (MAC) protocols have been devised for different type of architectures, applications and media. A medium access control (MAC) protocol moderates access to the shared medium by defining rules that allow devices to communicate with each other in an orderly and efficient manner. There are many MAC protocols for conventio...

The rapid technological advances and innovations of the past few decades have pushed wireless communication from concept to reality. The popularity of wireless communication systems can be seen almost everywhere in the form of cellular networks, WLANs, and WPANs. Packet-switched technology has been demonstrated as effective in cellular radio system...

Cycloaromatic polyamines based on aniline, 4,4′-diaminodiphenylmethane and formaldehyde have been synthesized varying the molar ratio of aniline and formaldehyde keeping the amount of 4,4′-diaminodiphenylmethane constant via a single-step process, coded as PO1, PO2 and PO3. The resinous material of polyamines has been employed for curing studies of...

Semi-arid Gujarat has clocked high and steady growth at 9.6% per year in agricultural state domestic product since 1999-2000. What has driven this growth? The Gujarat government has aggressively pursued an innovative agriculture development programme by liberalising markets, inviting private capital, reinventing agricultural extension, improving ro...

Indigenous Montmorillonite clay available from Kutchh region in western part of India was modified by Hexadecyl trimethyl ammonium bromide, a quaternary ammonium compound to make it organophilic. It was blended with high density polyethylene (HDPE) in a Brabender Plasticoder. The condition for blending was optimized and sheets were prepared for eva...

High density polyethylene (HDPE)/Nylon-6 blends of varying concentrations and compatibilized with Na-neutralized ethylene-methacrylic acid ionomer were prepared and characterized. Specimens in sheet form were prepared and tensile strength, elongation, Izod impact resistance, hardness, insulation resistance, arc resistance, dielectric strength, and...

Alkyd resin based on jatropha and rapeseed oils using glycerol, phthalic, and maleic anhydride were synthesized to obtain the resins suitable for electrical applications. These resins were characterized for the physical and electrical properties. Varnishes were prepared using these resins and characterized as per standard methods. In general, both...

Graft copolymerization of polypropylene copolymer (PCP) with maleic anhydride (MA) was studied in melt in Brabender Plasticorder, Twin Screw Extruder by using peroxide initiators, such as benzoyl peroxide (BPO), lauryl peroxide (LPO), luperox-101 (LPU), and dicumyl peroxide (DCP). The variation of MA and initiator concentrations on percent grafting...

Polyesters based on poly(alkyl anhydride), aromatic anhydrides, and polyglycols were synthesized by thermal and catalytic condensation polymerization techniques. The polymerization conditions were optimized by the variation of the monomer concentration, reaction temperature, and so on to achieve the desired properties. The reaction was monitored by...

N-vinyl pyrrolidone (NVP) was grafted onto a polypropylene copolymer (PP) in melt in a Brabender Plasticorder and single screw extruder. The effect of variation of dicumyl peroxide (DCP) and lupersol (LUP) concentrations alone and with 20 wt % NVP concentration in the Brabender Plasticorder on Melt Flow Index (MFI) and final torque values was studi...

In the present work, the concept of ‘Max Code’ approach is used for establishing identification code of planetary gear spur trains. Such a representation provides an expression rather than an unique number. An attempt is made here to establish these expressions for distinct single and two degrees of freedom planetary gear trains. The concept of max...

Solid-phase grafting of 4-vinyl pyridine onto isotactic polypropylene (IPP) resulted in 12.7% grafting at optimized conditions. The chain transfer mechanism with solvent for termination of the growing chain resulted in a decreased percentage of grafting with increased concentration of the interfacial agent. Graft copolymers were characterized by sp...

Neodymium chloride tripentanolate catalysts of the general formula NdCl3 × nL with n = 3, L = 1-pentanol (II), 2-pentanol (III), and 3-pentanol (IV) were prepared by an alcohol interchange reaction between neodymium chloride n isopropanolate (I) with pentanols. These NdCl3 tripentanolates (II–IV) were characterized by gravimetric and elemental anal...

Neodymium chloride tripentanolate catalysts of the general formula NdCl3 X nL with n = 3, L = 1-pentanol (II), 2-pentanol (III), and 3-pentanol (IV) were prepared by an alcohol interchange reaction between neodymium chloride n isopropanolate (I) with pentanols. These NdCl3 tripentanolates (II-IV) were characterized by gravimetric and elemental anal...

Grafting of 2-hydroxyethyl methacrylate (2-HEMA) on isotactic polypropylene (IPP) and in situ chlorinated polypropylene (CPP) by free radical process was carried out at 110°C using toluene as solvent. Various conditions for grafting were optimized. The maximum percent of grafting of 2-HEMA achieved on IPP was 3.6%, whereas that on in situ CPP was 8...

Grafting of 2-hydroxyethyl methacrylate (2-HEMA) on isotactic polypropylene (IPP) and in situ chlorinated polypropylene (CPP) by free radical process was carried out at 100°C using toluene as solvent. Various conditions for grafting were optimized. The maximum percent of grafting of 2-HEMA achieved on IPP was 3.6%, whereas that on in situ CPP was 8...

The resistance of majority ofM. tuberculosis strains to rifampicin a key drug in the tuberculosis therapy, has been cause of major alarm world-wide. Such an association of strain with the drug takes a long time i.e. 2-3 months. We have modified a method for rapid detection of rifampicin resistant strains by screening them through PCR-SSCP.We have i...

Neodymium chloride 2-ethylhexanolates of the general formula NdCl3·nL were prepared by ligand exchange reaction between neodymium chloride ispropanolate (I) and 2-ethylhexanol (EH). These hexanolates, NdCl3·1.5 EH (II) and NdCl3·2.5 EH (III), were characterized by elemental analysis and gravimetry. The catalytic activity of these hexanolates in com...

Objective: To study the effect of garlic on hyperlipidemia in immune complex disease in rabbits. Methods: Experimental induced immune complex disease was produced in 22 albino male rabbits (1.0-1.5 kg) by injecting horse serum proteins at a dose of 175 mg/kg body weight, every 72 hours i.v., and divided into two groups. Twelve rabbits were treated...

The influence of reaction pressure on rate of polymerization and intrinsic viscosity in acrylonitrile (AN), methyl acrylate (MA) and itaconic acid (IA) ternary suspension polymerization system has been studied using free radical forming potassium persulphate and sodium metabisulphite water soluble redox initiator pair. The resulting polymers synthe...

The present study proposes to include farmers' appraisal (eye estimate) as one of the variables in the models alongwith plant characters. This will reduce the number of plant character in the model, thus reducing the cost on data collection. This has been demonstrated through regression and probability models.

A total of 130 Vibrio cholerae strains isolated during November 1989 to December 1992 from the rural population of Loni areas--Ahmednagar district of Maharashtra were characterised. Of these isolates, 124 were El tor vibrios serotype Ogawa, and 6 were El tor vibrios serotype Inaba. One hundred twenty two strains belonging to T4 phage, while 8 strai...

Nine thousand four hundred thirty three pyrexial cases were screened for the evidence of Malaria and Glucose-6-phosphate dehydrogenase deficiency among the rural tribal population of seven primary health centres in the malarial endemic areas of Udaipur District in Southern Rajasthan. One thousand four hundred five (P. Falciparum 831 and P. Vivax 57...

Three hundred and fifty three subjects among the rural population of Loni area admitted in the hospital, and 188 medical staff members working in the Rural Medical College and Hospital, Loni, were screened for the presence of HBsAg. Reveresed passive haemagglutination assay was used for screening; it showed an HBsAg positivity rate of 21.8% and 15....

Logistic growth model can be used to forcast total dry matter at maturity about one month before harvest in wheat and rice whereas forecast of head/panicle weight can be made about 15 days advance of harvest. Total dry matter as well as head weight at maturity were over estimated in general when partial data were used. Modified growth model worked...

Markov chain approach has been adopted to forecast sugarcane yield. Two years data (1977–78 and 1978–79) on biometrical characters and yield collected by IASRI, New Delhi under the pilot study on pre-harvest forecasting of sugarcane yield in Meerut district (U.P.) were utilised for the study. Yield forecasts at 7–8 months after planting (about 2–3...

The present paper deals with interval estimation of variance components in two way nested unbalanced random model. Employing a suitable transformation a statistic has been developed and its distribution is well approximated by chi-square. The confidence intervals for variance components and the simultaneous confidence interval for their ratios have...

The alterations in serum/plasma levels of total haemolytic complement activity (CH50), complement components C3 and C3d, and circulating immune complexes (CICs) in patients with pulmonary tuberculosis were analysed in relation to the severity of disease and treatment status. The mean levels of CH50, C3, C3d and CICs were significantly higher in unt...

Rock phosphate was leached with dilute sulphuric acid in an ejector—contactor. The effect of parameters such as leaching temperature, particle size,

Various models to study the effects of weather variables on rice yield at different stages of crop growth and to forecast its yield for Puri district have been attempted. The results indicated that above average maximum daily temperature had beneficial effects during ripening stage; detrimental effects during reproductive stage of the crop while in...

An electrophoretic study of haemolysates from 1350 subjects from the indigenous population of Libya was carried out to find the incidence of abnormal haemoglobins and thalassaemia. Sickle cell disease was detected in five (0.37%), sickle cell trait in 61 (4.51%), sickle cell thalassaemia in three (0.21%), homozygous betathalassaemia in 16 (1.20%),...

A model has been developed for forecasting of crop yields in which growth indices of biometrical characters based on two or more periods simultaneously have been utilised. The growth indices are obtained as weighted accumulations of observations on biometrical characters in different periods, weights being respective correlation coefficients betwee...

An attempt has been made to study the joint effect of climatic variables on rice yield at different stages of crop growth. Beneficial effects of above average maximum temperature on yield increased with rise in humidity during active vegetative phase while detrimental effects decreased in other phase of crop growth. The rise in humidity had small b...

Chalcopyrite concentrate has been roasted in a mullite tube furnace and the optimum temperature of roasting determined. The roasted concentrate has been leached with dilute sulphuric acid in a jet contactor. Optimum performance data for leaching, namely temperature, particle size, slurry concentration, acid concentration, nozzle diameter and effect...

The average diet consumed by Libyans resembles that in developed Western countries in being high in calories and containing a substantial amount of animal protein and fat. Total serum cholesterol and betalipoprotein cholesterol were determined in a section of the population of Benghazi and the figures were compared with those from other countries....

An attempt has been made in this paper to study the effect of climatic variables on rice yield at different stages of crop growth as also to forecast rice yield using climatic variables. The results show that the crop reacts differently to climatic parameters during different stages of its growth. Above average maximum daily temperature is benefici...

Electrophoretic study of haemolysates from five hundred and forty-five subjects from the University of Garyounis, Benghazi, was carried out to find out the incidence of abnormal haemoglobins in Libya. Abnormal haemoglobins were encountered in 23 subjects of unrelated families, giving an overall incidence of 4.2 per cent. Sixteen of these subjects h...

A comparative, double blind, clinical study with pipothiazine palmitate and fluphenazine enanthate was conducted in 30 chronically hospitalized schizophrenic patients. Both treatment groups showed statistically significant improvement in the total scores, all four factors, and 11 of the 18 items of the BPRS; and no significant differences between t...

An unusual case of tuberculosis of the intercostal lymph nodes with intrathoracic extrapleural cold abscess almost encircling the hemithorax and presenting with respiratory symptoms is reported.RésuméLes auteurs rapportent un cas inhabituel de tuberculose des ganglions intercostaux avec un abcès froid intrathoracique extra pleural encerclant presqu...

Results of the detailed investigations of a case of pulmonary cryptococcosis are presented. The diagnosis is based on the isolation of Cryptococcus neoformans from sputum and resected lung tissue and the presence of fungal elements in the serial sections of the tissue.

A case of anterior mediastinal dermoid cyst which had ruptured into the bronchial tree and had its vascular pedicle attached to the pericardium is reported in an 18 yr old man.

Twelve cases of toxic psychosis were treated with benztropine mesylate, which has been found useful in the control of extrapyramidal signs occurring in the course of neuroleptic therapy. Patients of all age groups are susceptible to toxic psychosis - the average age of these patients was 37.6 yr. All patients were on therapeutic doses of benztropin...

Eleven cases of nocardiosis were detected in a series of 639 patients of bronchopulmonary diseases investigated, giving an overall prevalence of 1.7%. Of the various categories of bronchopulmonary diseases examined, the clinical group of pulmonary tuberculosis not responding to antituberculous therapy and found to be negative for acid fast bacilli...

Proliferation in groundwater withdrawal in Gujarat has led to development of water stress in the near surface shallow aquifer, which sustains major component of groundwater draft for irrigation and domestic requirements. This is clearly evident from the seven-fold increase in numbers of critical and over-exploited assessment units, which have incre...