Ludhiana, India
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Jain C.,Guru Nanak Institutions
2016 IEEE International Conference on Recent Trends in Electronics, Information and Communication Technology, RTEICT 2016 - Proceedings | Year: 2016

This paper presents the design and experimental investigation of a compact Spiralled Swastika Slotted antenna for the frequency range 2-6 GHz. By means of full wave method of moments, this geometry has been designed with overall dimensions of 0.24λ0X0.24λ0X 0.02λ0.The characteristic performance criteria like reflection coefficient, VSWR, radiation patterns for the designed antenna are studied. The numerical simulations exhibit that the antenna operates over the frequencies 2.37 GHz, 3.17 GHz, 3.83 GHz, 5.94 GHz suitable for Wi-Max, WLAN and other modern space applications with an impedance bandwidth of 185 MHz. Experimental verification for the prototype has been done using Rohde and Schwarz VNA. Good agreement is observed between simulated and experimented results. © 2016 IEEE.

Singh K.,Guru Nanak Institutions | Padhy N.P.,Indian Institute of Technology Roorkee | Sharma J.,Indian Institute of Technology Roorkee
IEEE Transactions on Power Systems | Year: 2011

This paper investigates the influence of price responsive demand shifting bidding on congestion and locational marginal prices in pool-based day-ahead electricity markets. The market dispatch problem of the pool-based day-ahead electricity market is formulated as to maximize the social welfare of market participants subject to operational constraints given by real and reactive power balance equations, and security constraints in the form of apparent power flow limits over the congested lines. The social welfare objective function of the day-ahead market dispatch problem maximizes the benefit of distribution companies and other bulk consumers based on their price responsive demand shifting bids and minimizes the real and reactive power generation cost of generation companies. The price responsive demand shifting bidding mechanism, which has been recently introduced in the literature, is able to shift the price responsive demand from the periods of high price to the periods of low price in day-ahead electricity markets. The comparisons of the price responsive demand shifting bids with conventional price responsive and price taking bids are presented by solving hourly market dispatch problems on five-bus, IEEE 30-bus, realistic UP 75-bus Indian, and IEEE 118-bus systems for 24-h scheduling period. It has been demonstrated that the proposed approach leads to reduction in congestion and locational marginal prices as compared to price responsive and price taking bids and meets the energy consumption targets of distribution companies/bulk consumers. © 2010 IEEE.

Chhabra M.,Moradabad Institute of Technology | Singh R.,Guru Nanak Institutions
Rapid Prototyping Journal | Year: 2011

Purpose: This paper seeks to review the industrial applications of state-of-the-art additive manufacturing (AM) techniques in metal casting technology. An extensive survey of concepts, techniques, approaches and suitability of various commercialised rapid casting (RC) solutions with traditional casting methods is presented. Design/methodology/approach: The tooling required for producing metal casting such as fabrication of patterns, cores and moulds with RC directly by using different approaches are presented and evaluated. Relevant case studies and examples explaining the suitability and problems of using RC solutions by various manufacturers and researchers are also presented. Findings: Latest research to optimize the current RC solutions, and new inventions in processing techniques and materials in RC performed by researchers worldwide are also discussed. The discussion regarding the benefits of RC solutions to foundrymen, and challenges to produce accurate and cost-effective RC amongst AM manufacturers concludes this paper. Research limitations/implications: The research related to this survey is limited to the applicability of RC solutions to sand casting and investment casting processes. There is practically no implication in industrial application of RC technology. Originality/value: This review presents the information regarding potential AM application - RC, which facilitates the fabrication of patterns, cores and moulds directly using the computer-aided design data. The information available in this paper serves the purpose of researchers and academicians to explore the new options in the field of RC and especially users, manufacturers and service industries to produce casting in relatively much shorter time and at low cost and even to cast complex design components which otherwise was impossible by using traditional casting processes and CNC technology. © Emerald Group Publishing Limited.

Kumar P.,Guru Nanak Institutions
Chinese Journal of Chemistry | Year: 2010

Synthesis of bis-1,3-{6'-arylimidazo[2,1-b][1,3,4]thiadiazol-2-yl}-1,2,2-trimethylcyclopentane (3), bis-1,3-{thiadiazolo[2',3':2,1]imidazo[4,5-b]quinoxalinyl}-1,2,2-trimethylcyclopentane (5) has been achieved by the reaction of bis-(5'-amino-1',3',4'-thiadiazolyl)-1,2,2-trimethylcyclopentane with α-haloketones, 2,3-dichloroquinoxaline respectively. Bromination of compound 3 furnished bis-1,3-{5'-bromo-6'-arylimidazo[2,1-b][1,3,4]thiadiazol-2-yl}-1,2,2-trimethylcyclopentane (4). The structural assignment of these compounds was supported by IR, 1H NMR and elemental analysis data. The antimicrobial, anti-inflammatory and antifungal activities of some of the compounds have also been evaluated. © 2010 SIOC, CAS, Shanghai, & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Singh R.,Guru Nanak Institutions
Rapid Prototyping Journal | Year: 2013

Purpose - Fused deposition modeling (FDM) is an additive manufacturing technology commonly used for modelling, prototyping, and batch production applications. The purpose of this paper is to investigate properties of plastic replicas, fabricated as small-sized product moulds with FDM. Design/methodology/approach - From the identification of component, prototypes of ABS plastic material were prepared for commercial end-user applications, such as vacuum moulding, vacuum casting, investment casting, etc. Findings - The study highlighted the best settings of orientation and support material quantity for the selected component on FDM machine, from the dimensional accuracy and economic points of view. Originality/value - Final replicas prepared are acceptable as per DIN 16901 and ISO (UNI EN 20286-I-1995) standard for industrial applications. The results are also supported by SEM analysis. © Emerald Group Publishing Limited.

Singh R.,Guru Nanak Institutions
Journal of Mechanical Science and Technology | Year: 2010

The purpose of the present investigations is to study the effect of moulding sand on decreasing shell wall thickness of mould cavities for economical and statistically controlled hybrid rapid casting solutions (combination of three dimensional printing and conventional sand casting) for zinc alloys. Starting from the identification of component/ benchmark, technological prototypes were produced at different shell wall thicknesses supported by three different types of sands (namely: dry, green and molasses). Prototypes prepared by the proposed process are for assembly check purpose and not for functional validation of the parts. The study suggested that a shell wall with a less than recommended thickness (12mm) is more suitable for dimensional accuracy. The best dimensional accuracy was obtained at 3mm shell wall thickness with green sand. The process was found to be under statistical control. © 2010 The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.

Singh R.,Guru Nanak Institutions
Journal of Mechanical Science and Technology | Year: 2013

The purpose of the present investigation is to study the effect of molding sand properties on investment casting (IC) for process capability analysis. Starting from the identification of component/benchmark, ICs were produced with different grades of silica slurry layers (coarse, medium and fine) over the patterns (in the form of a tree). Measurements on a coordinate measuring machine (CMM) helped in calculating the dimensional tolerances of the castings produced. Some important mechanical properties were also compared to verify the suitability of the castings. The study suggested the long-term performance level of the IC process after it has been brought under statistical control as casting solution for plain carbon steel. The provided data from the experimentation highlights the ability of the IC process to produce a product that will consistently meet the design requirements and the customer expectation. © 2013 The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.

Singh U.,Guru Nanak Institutions | Kamal T.S.,DIET
IET Microwaves, Antennas and Propagation | Year: 2011

Biogeography-based optimisation (BBO) is employed for the optimisation of non-uniform circular antenna arrays. In BBO, the problem solutions are represented as islands and the sharing of features between solutions corresponds to immigration and emigration between the islands. The scheme of BBO is employed to find out an optimal set of weights and antenna element separations to provide a radiation pattern with maximum side lobe level (SLL) reduction with the constraint of a fixed major lobe beam width. The capability of BBO is demonstrated by taking different sizes of antennas. The results show that the design of non-uniform circular antenna arrays using the BBO algorithm offers a SLL reduction better than that obtained using genetic algorithms, particle swarm optimisation and simulated annealing.© 2011 The Institution of Engineering and Technology.

An easy, safe, effective and handy method for oxidative aromatization of Hantzsch 1,4-dihydropyridines catalyzed by hypervalent iodine (iodosobenzene) and potassium bromide to corresponding pyridine derivatives in high-yields and within short span of time was described. Dealkylation in case of 4-n-alkyl substituted 1,4-dihydropyridines was not obtained. © 2010 HeteroCorporation.

Choudhary A.K.,National Institute of Technology Jamshedpur | Jha J.N.,Guru Nanak Institutions | Gill K.S.,Guru Nanak Institutions
Geotextiles and Geomembranes | Year: 2010

The paper presents the results of laboratory model tests on bearing capacity behaviour of a strip footing resting on the top of a geogrid reinforced flyash slope. A series of model footing tests covering a wide range of boundary conditions, including unreinforced cases were conducted by varying parameters such as location and depth of embedment of single geogrid layer, number of geogrid layers, location of footing relative to the slope crest, slope angles and width of footing. The results of the investigation indicate that both the pressure-settlement behaviour and the ultimate bearing capacity of footing resting on the top of a flyash slope can be enhanced by the presence of reinforcing layers. However the efficiency of flyash geogrid system increases with the increasing number of geogrid layers and edge distance of footing from the slope. Based on experimental results critical values of geogrid parameters for maximum reinforcing effects are established. Experimental results obtained from a series of model tests have been presented and discussed in the paper. © 2009 Elsevier Ltd.

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