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1

Closure of municipal solid waste dumps. Site rating for odor impact

Kumar A., Datta M., Nema A. K., Singh R. K., Gurjar B. R.

Environment Protection Engineering

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2018

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Vol. 44, nr 2

37--56

EN

More than 60% of the waste dumps in India are within 500 m from the communities. The odor impact from these sites may be the sole criterion to prioritize these sites for closure/remediation. The existing rating systems do not consider odor impact in their assessment. A new system, proposed in the study, employs seven parameters derived from the literature review and selects their ratings based on data obtained from a survey of waste dumps in Indian cities having population more than one million and expert judgment. Application of the new system to the waste sites with continuously varying characteristics shows that the scores are spread over the full range of 0–1000 and have minimum clustering. The sensitivity analysis of the new system shows that the system exhibits medium to high sensitivity to five out of seven parameters employed in the system. The odor impact ratings for the fifteen waste dumps from the new system prioritize these dumps into three categories for remedial action and help suggesting a particular cover alternative for these dumps.

2

Simulation & Performance Comparison between DSR, FSR & HSR Routing Protocols in MANET Using NS2

Singh Kuber, Singh R. K., Bisht Sanjeev Singh, Bartwal Monika

Annals of Computer Science and Information Systems

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2017

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Vol. 10

83--88

EN

Mobile Ad-hoc Networks (MANETs) are a combination of various mobile nodes where these mobile nodes are communicate to each other. These mobile nodes are controlled by without any central node. Mobile ad-hoc networks have various set of applications such as- it is diverse, ranging from small, mobility, high bandwidth and highly static \& dynamic networks. A mobile ad-hoc network has some basic needs such as -- a distributed algorithm to establish a structure \& organization of a network, link scheduling between mobile nodes, and packet switching technique. Author proposed a comparison simulation work of different types of routing protocols such as Dynamic state routing(DSR), Fisheye State Routing(FSR) and Hierarchical State Routing(HSR) protocols by a network simulator (NS-2). In this paper, routing protocols (DSR, HSR \& FSR) are discussed and compared in different points such as packets delivery technique, average routing head and throughput.

3

Kaiser effect observation in reinforced concrete structures and its use for damage assessment

Vidya Sagar R., Raghu Prasad B. K., Singh R. K.

Archives of Civil and Mechanical Engineering

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2015

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Vol. 15, no. 2

548--557

EN

Reinforced concrete (RC) beams of span 3 m were tested under incremental cyclic load at different loading rates and simultaneously during the fracture process in the RC beams acoustic emissions (AE) were recorded. An attempt has been made to study the Kaiser effect as a measure of damage in RC beams. It was observed that RC beams made with high strength concrete under incremental cyclic loading showed an obvious Kaiser effect before the failure load. The results may be useful to study the damage in concrete structures and provide a reference for the application of Kaiser effect in engineering practice.

4

Geographical considerations in the design of an off-grid power system in remote South Australia

Singh R. K., Göl Ö., Nafalski A.

Maszyny Elektryczne : zeszyty problemowe

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2011

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Nr 3(91)

55-59

EN

Remote communities suffer from geographical isolation in many regards which include logistics of supply of commodities and, particularly, supply of electricity. This is particularly serious in countries with vast expanses between settlements such as Australia. The time-honoured solution to supplying power to remote communities has been by means of generator sets with internal combustion engine prime movers, which is costly, both in financial and environmental terms. This paper addresses the power supply needs of a remote community in South Australia and proposes a hybrid system integrating renewable energy with existing internal combustion engine driven generators, taking into account the geographical peculiarities of the site.

5

A standalone hybrid power system for the outback community of Oodnadatta in South Australia

Singh R. K., Göl Ö., Nafalski A.

Maszyny Elektryczne : zeszyty problemowe

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2011

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Nr 5(93)

185-190

EN

Hybrid electrical power systems consisting of a combination fossil fuels powered generators and renewable energy sources in standalone grid-off configurations are gaining prominence in remote communities where grid extension are difficult and often very costly. This paper focuses on the design of a hybrid power system in an outback community of South Australia - Oodnadatta. An optimal standalone hybrid power system comprising photovoltaics, diesel and propane is proposed with the lowest levelised Cost of Electricity (COE) with at least 10% solar contribution. The proposed hybrid system is designed with the HOMER software utilising average daily solar radiation values for the years 2007-2009 and estimated power consumption data. The existing conventional power system in Oodnadatta is also modelled to compare and contrast with the proposed hybrid system to assess its impact on COE and greenhouse gas emissions.

6

Acoustical investigations of uranium chalcogenides

Singh R. K., Pandey K. K., Singh M. P., Singh R. P.

Materials Science Poland

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2009

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Vol. 27, No. 4/1

1041--1053

EN

Ultrasonic attenuation due to phonon-phonon interaction and thermoelastic loss was evaluated in uranium chalcogenides viz. UX, X= S, Se, Te in fcc phase in the temperature range 50-600 K for longitudinal and shear waves along the <100>, <110> and <111> directions of propagation. Electrostatic and Born-Mayer repulsive potentials were used to obtain second and third order elastic constants, taking the nearest neighbour distance and hardness parameter as the input data. Second and third order elastic constants (obtained at various temperatures) were used to obtain the Gruneisen parameters and non-linearity or anisotropy parameters, which in turn were used to evaluate the ultrasonic attenuation coefficient over the frequency square due to phonon-phonon interaction, (?/f 2)p-p in the Akhiezer regime. It has been found that at lower temperatures ?/f 2 increases rapidly with temperature, and at higher temperatures the rate of increase becomes small. Contribution to the total attenuation due to thermoelastic loss is negligible in comparison with that of phonon-phonon interaction, i.e. a major part of the energy from the sound wave is removed, due to interaction of acoustic phonons with thermal phonons (lattice vibrations).