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Search Results: 1 - 10 of 371620 matches for " D. R. Peshwe "
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Effect of austenitization temperature on microstructure and mechanical properties of low-carbon-equivalent carbidic austempered ductile iron
Vinayak Dakre,D. R. Peshwe,S. U. Pathak,Ajay Likhite
- , 2018, DOI: https://doi.org/10.1007/s12613-018-1625-4
Abstract: The wear resistances of austempered ductile iron (ADI) were improved through introduction of a new phase (carbide) into the matrix by addition of chromium. In the present investigation, low-carbon-equivalent ductile iron (LCEDI) (CE = 3.06%, and CE represents carbon- equivalent) with 2.42% chromium was selected. LCEDI was austenitized at two different temperatures (900 and 975°C) and soaked for 1 h and then quenched in a salt bath at 325°C for 0 to 10 h. Samples were analyzed using optical microscopy and X-ray diffraction. Wear tests were carried out on a pin-on-disk-type machine. The effect of austenization temperature on the wear resistance, impact strength, and the microstructure was evaluated. A structure–property correlation based on the observations is established.
Indian Streams Research Journal , 2012,
Abstract: Electronic Customer Relationship Management (E-CRM) has become the latestparadigm in the world of Customer Relationship Management. E-CRM is becomingmore and more necessary as businesses take to the web. This paper promotes the value ofE-CRM, explores its benefits, outlines the focal points to address prior toimplementation, outlines potential pitfalls during implementation and ways to avoid,takes a look at recent trends and presents a proven E-CRM success story. ElectronicCustomer Relationship Management (E-CRM) has attracted the attention of managersand academic researchers for the past several years. Issues of E-CRM have varied frommarketing to information technology.
Farming nickel from non-ore deposits, combined with CO2 sequestration  [PDF]
R. D. Schuiling
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.54057

A new way is described to recover nickel from common rock-types, by the use of nickel hyperaccumulator plants. The idea of phytomining nickel was suggested earlier, but never implemented. This situation may soon change, because the mining sector suffers from a poor image on account of the impact of mining on the environment, and would like to reduce the pollution and high energy consumption associated with metal extraction. Once phytomining is established as a viable way of nickel production, it is likely that governments will impose nickel mines to realize part of their nickel production by this method. This will lead to a considerable decrease of CO2 emissions. Phytomining from rocks rich in olivine or serpentine is CO2-negative. When metal extraction goes hand in hand with CO2 sequestration, it will improve the image of the mining sector. Other advantages include that unproductive soils can serve to grow nickel hyperaccumulator plants and recover nickel. The extensive mining technology can provide employment to many poor farmers/miners. Countries that want to be self-sufficient in strategic materials, and avoid spending foreign currency on importing them can switch to phytomining. This paper treats different aspects of future nickel farming.

Detection of Fronts from Ocean Colour Monitor Images Using Entropic Technique: A Case Study of Meso- and Micro-Scale Chlorophyll Mapping in Bay of Bengal, India  [PDF]
R. Vinuchandran, D. Ramakrishnan
Advances in Remote Sensing (ARS) , 2013, DOI: 10.4236/ars.2013.22010

This paper discusses a robust technique using entropy-based detection for delineating edges in ocean colour images. The detection process relies on Jhensen-Shannon divergence based image segmentation, which has been found to be the most suitable for noisy ocean colour images. In the attempted technique, partial removal of the noise in the images is performed and the edges are detected using entropic method. In our approach, Jhensen-Shannon divergence for the images is calculated, and the divergence image is arrived at after applying an appropriate threshold and filter to estimate the gradients. An attempted case study on retrieving chlorophyll front edges using this technique indicates that entropic method is far superior to conventional edge-enhancement tools, in terms of its insensitivity to impulsive noises and, capability in detecting meso- and micro-scale changes. This procedure would largely decrease the ambiguities associated with the ocean colour edges and hence has promising application potential in targeting fishing zones, sediment dispersion modeling and climate related studies.

Serpentinite Slurries against Forest Fires  [PDF]
R. D. Schuiling
Open Journal of Forestry (OJF) , 2015, DOI: 10.4236/ojf.2015.53022
Abstract: Forest fires are one of the commonest natural hazards. Forest fires make the largest contribution to CO2 emissions after the burning of fossil fuels. Here a new technology is proposed to extinguish forest fires not with water, but with a slurry of serpentine. Serpentinites are abundantly available in many countries on every continent. If serpentine is calcined, it weathers very fast and captures CO2. Calcination, however, requires a lot of heat, which makes it counterproductive to produce calcined serpentine for CO2 capture. In cases, however, where heat is the problem, like in forest fires, one can extinguish them to greater advantage by using serpentinite slurries instead of plain water. The calcined residue that is left as a thin cake on the burning material prevents oxygen to reach the burning material. It also prevents the escape of inflammable gases, and the calcination itself withdraws large quantities of heat from the fire. After the fire is extinguished, the calcined material in contact with the atmosphere will rapidly weather and capture CO2. This compensates part of the CO2 that is produced by the fire. In tests, where the efficacy of quenching fires with serpentine slurries was compared to the effect of water, it turned out that serpentinite slurries performed far better.
Multi-Machine Power Stabilization Controller (MMPSC) for Power Quality Applications  [PDF]
D. Sabapathi, R. Anita
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.710250
Abstract: Power system stability control is a challenging task in power generation, transmission and distributions based applications and in many fields. Multi-machine power compensation control can achieve system stabilization within a prescribed time in conventional controller. However, limited time control cannot guarantee the system convergence within particular time independent on the initial condition, which makes illegal application into the practical system if the initial condition is unknown in advance. The proposed Multi-Machine Power System Compensation (MMPSC) control overcomes the issues in existing systems and limited time stability controller. Due to this attractive solution, multi-machine power compensation control stability has found applications in uniform exact differentiator design for the multi-agent system. The proposed multi-machine power compensation control reduces damping oscillation and improves the power system stability control. The main objective of proposed controller is to improve the stability of MMPSC limited time system stabilization independent of the initial state and ensure fast convergence both far away from and at a close range of the power monitoring system. This feature can reduce the loss caused by unwanted oscillation and avoid voltage collapse. To overcome the linearity problem of terminal mode control, saturation function is introduced to limit the amplitude of power input. In comparison with the existing results on stability control, the proposed MMPSC applies a simpler method to overcome stability problem and achieves higher efficiency.
The Art of Estimating a Moving Parameter and Reducing Bias Introduced by Inflated Measurements in Student Assessments  [PDF]
R. D. Wooten, D. Jelsovsky, R. Back, J. D’Andrea
American Journal of Computational Mathematics (AJCM) , 2018, DOI: 10.4236/ajcm.2018.81003
Abstract: In this paper, we discuss the art of estimating the greatest level of understanding obtained by a student based on five assessment types ranked based on their correlation between the set maximum levels of understanding. The results show a weighting system yields a point estimate that has a stronger correlation between the preset levels of understanding than a simple point system.
Grounded and Floating Inductance Simulation Circuits Using VDTAs  [PDF]
Dinesh Prasad, D. R. Bhaskar
Circuits and Systems (CS) , 2012, DOI: 10.4236/cs.2012.34048
Abstract: New electronically-controllable lossless grounded and floating inductance simulation circuits have been proposed employing Voltage Differencing Transconductance Amplifiers (VDTA). The proposed grounded inductance (GI) circuit employs a single VDTA and one grounded capacitor whereas the floating inductance (FI) circuit employs two VDTAs and one grounded capacitor. The workability of the new circuits has been verified using SPICE simulation with TSMC CMOS 0.18 μm process parameters.
Linkage between India Implied Volatility Index and Stock Index Returns  [PDF]
Palamalai Srinivasan, R. D. Vasudevan
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.74063
Abstract: The present study examines the linkage between the change in implied volatility index and the underlying stock index return in the Indian stock market. The empirical results revealed that the contemporaneous return is the most important factor that determines the changes in the current India implied volatility. Besides, the empirical evidences confirm the negative asymmetry volatility-return relation, supporting the behavioral explanations (the affect and representativeness heuristics) rather than financial leverage hypothesis.
Synergistic Influence of Pre-Harvest Calcium Sprays and Postharvest Hot Water Treatment on Fruit Firmness, Decay, Bitter Pit Incidence and Postharvest Quality of Royal Delicious Apples (Malus x domestica Borkh)  [PDF]
R. R. Sharma, D. Singh, R. K. Pal
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.41020
Abstract: Experiments were conducted to observe the effect of pre-harvest calcium (Ca) applied as calcium chloride (1% W/V) and postharvest hot water treatment (HWT) on Royal Delicious apples. For this, apples were divided in 4 lots viz., untreated (neither Ca nor HWT), Ca alone (pre-harvest 3 sprays of CaCl2 (1.0% w/v) in the orchard), HWT (42℃ for 2 h). Apples of all four lots were stored in cold storage maintained at 0℃ ± 1℃ and 90% - 95% relative humidity for 6 months. After storage, fruits were removed to ambient conditions for 5 days, and then observations on decay area and incidence, bitter pit incidence, fruit Ca content, lipoxygenase (LOX) and antioxidant (AOX) activity, fruit firmness and fruit quality parameters were recorded. After 6 months in cold storage plus 5 day at 22℃ ± 2℃ and 70% + 4% RH, apples, which received Ca as pre-harvest spray or those which received postharvest hot water treatment or Ca + HWT had significantly lesser decay area (decay lesions) caused by Penicillium expansum or Botrytis cinerea than untreated ones (control). Ca + HWT treatment was significantly more effective on B. cinerea than P. expansum. Untreated apples exhibited higher incidence of bitter pit (18.2%) than those treated with Ca or HWT or both. Fruit Ca content
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