1,735,118 research outputs found
A Novel Narrow Band Red‐Emitting Phosphor for White Light Emitting Diodes
No full textResearch on down conversion phosphor materials is the key for the development of solid-state lighting (SSL). Especially finding alternative red phosphor for white light emitting diodes (LEDs) based on blue or near ultraviolet (NUV) LEDs is important research task. In this view, we have synthesized a series of Eu(3+)-substituted La(2)W(2-x)Mo(x)O(9) (x = 0-2, in step of 0.3) red phosphor and characterized by X-ray diffraction (XRD) and photoluminescence. XRD results reveal a phase transition from triclinic to cubic structure for x > 0.2. All the compositions show broad charge transfer (CT) band due to CT from oxygen to tungsten/molybdenum and red emission due to Eu(3+) ions. Select compositions show high red emission intensity compared with the commercial red phosphor under NUV/blue ray excitation. Hence, this candidate can be a possible red phosphor for white LEDs.V. Sivakumar acknowledges the Brian Korea 21
(BK 21) program for research fellowship
Climatic classification: a consultants' meeting at ICRISAT Patancheru, Andhra Pradesh, India, 14-16 Apr 1980
No full textThis proceedings consists of the following papers: welcome address ( Swindale, L.D.); need, relevance, and objectives of the consultants' meeting on climatic classification (Virmani, S.M.); first session: current concepts and approaches; climatic classification: concepts for dry tropical environments (Grove, A.T.); classification of semi-arid tropics: climatic and phytogeographic approaches (Meher-Homji, V.M.); use of principal component analysis in rational classification of climates (Gadgil, S; J oshi, N.V.); second session: a practical classification system for agriculture in the SAT: climatic classification of semi -arid tropics in relation to farming systems research (Vi rmani, S.M. ; Sivakumar, M.V.K.; Reddy, S.J.); climatic classification, agroclimatic resource assessment, and possibilities for application in the semi -arid tropics ( Williams, G.D.V.; Masterton, J.); agroclimatic classification methods and their application to India (Krishnan, A.); agroclimatic classification for assessment of crop potential and its application to and dry farming tract s of India ( Sarker, R.P.; Biswas, B.C.
Assessing growth in teaching and learning using [new] technologies
No full textSivakumar Alagumalaihttp://www.geocities.com/drwanrani/ICMEEPMrelayFullProg.pd
Comment on a paper by Rindani and Sivakumar
No full textIn a recent work Rindani and Sivakumar claim to have found a new spin-3/2 theory with novel properties. It is shown here that the system which they consider is equivalent to the conventional Rarita-Schwinger equation. Their approach therefore appears unlikely to succeed in eliminating any of the long-standing problems associated with the interacting spin-3/2 field
Reevaluating the perception of Space:Is Space Truly Black or colorless?
No full textThis research explores a fundamental question in astrophysics: Is space truly black, or does it only appear so due to the absence of light? Challenging the conventional view that space is inherently black, the author proposes that space is actually colorless, and the perception of blackness is a result of the lack of light particles reaching the observer’s eye. The paper evaluates the nature of natural light, including that from stars and the Sun, and argues that no natural source emits black as part of its spectrum. This independent research is authored by Sivakumar, an original thinker based in India, and aims to stimulate deeper inquiry into cosmic perception, light behavior, and the limitations of human visual understanding in interpreting space
Reevaluating the perception of Space:Is Space Truly Black or Colorless?
No full textThis research explores a fundamental question in astrophysics: Is space truly black, or does it only appear so due to the absence of light? Challenging the conventional view that space is inherently black, the author proposes that space is actually colorless, and the perception of blackness is a result of the lack of light particles reaching the observer’s eye. The paper evaluates the nature of natural light, including that from stars and the Sun, and argues that no natural source emits black as part of its spectrum. This independent research is authored by Sivakumar, an original thinker based in India, and aims to stimulate deeper inquiry into cosmic perception, light behavior, and the limitations of human visual understanding in interpreting space. The paper has been submitted to OSF to ensure transparent sharing, open feedback, and archival of this work for the scientific community
Jayashree Sivakumar ’20 receives this year’s South Asian Bar Association (SABA) Student Recognition Award
No full textCongratulations to SABA award winner Jayashree Sivakumar who graduated from Osgoode in June and is currently articling at Waddell Phillips, a boutique litigation firm in downtown Toronto
Microsoft Word - Prof. Sivakumar
No full textAbstract Internet Traffic has grown exponentially over last few years due to provision of multiple class services through Internet backbone. With the explosive use of Internet, contemporary Internet routers are susceptible to overloads and their services deteriorate drastically and often cause denial of services. In this paper, an analysis is made how forecasting technique, routing algorithm and Genetic algorithm can be simultaneously applied for solving a multi-constrained routing problem in Quality of service (QoS) traffic in Internet. Also, a model is suggested for solving the above-mentioned problem. Simulation results show that the throughput of the given network is enhanced by implementing the model. It can also be seen that the average delay of packets flowing through the network comes down when the proposed model is employed for the network
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