1,363,476 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.
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
CIM automation in a semiconductor industry - The virtual factory system
No full textThis thesis describes the implementation of computer integrated manufacturing (CIM) automation in a Semiconductor Assembly and Test facility. The focus is on the enterprise vision of a Virtual Factory System (VFS) namely factory wide equipment SEMI Equipment Communication Standard/Generic Equipment Model (SECS/GEM) system connectivity and factory wide Automated Material Handling System (AMHS) implementation. (Professor Sivakumar)Master of Science (Computer Integrated Manufacturing
Soft-MS and computational mapping of oleuropein
No full textOlive oil and table olives are rich sources of biophenols, which provides a unique taste, aroma and potential health benefits. Specifically, green olive drupes are enriched with oleuropein, a bioactive biophenol secoiridoid. Olive oil contains hydrolytic derivatives such as hydroxytyrosol, oleacein and elenolate from oleuropein as well as tyrosol and oleocanthal from ligstroside. Biophenol secoiridoids are categorized by the presence of elenoic acid or its derivatives in their molecular structure. Medical studies suggest that olive biophenol secoiridoids could prevent cancer, obesity, osteoporosis, and neurodegeneration. Therefore, understanding the biomolecular dynamics of oleuropein can potentially improve olive-based functional foods and nutraceuticals. This review provides a critical assessment of oleuropein biomolecular mechanism and computational mapping that could contribute to nutrigenomics
Plant Cell Wall Integrity Perturbations and Priming for Defense
No full textA plant cell wall is a highly complex structure consisting of networks of polysaccharides, proteins, and polyphenols that dynamically change during growth and development in various tissues. The cell wall not only acts as a physical barrier but also dynamically responds to disturbances caused by biotic and abiotic stresses. Plants have well-established surveillance mechanisms to detect any cell wall perturbations. Specific immune signaling pathways are triggered to contrast biotic or abiotic forces, including cascades dedicated to reinforcing the cell wall structure. This review summarizes the recent developments in molecular mechanisms underlying maintenance of cell wall integrity in plant–pathogen and parasitic interactions. Subjects such as the effect of altered expression of endogenous plant cell-wall-related genes or apoplastic expression of microbial cell-wall-modifying enzymes on cell wall integrity are covered. Targeted genetic modifications as a tool to study the potential of cell wall elicitors, priming of signaling pathways, and the outcome of disease resistance phenotypes are also discussed. The prime importance of understanding the intricate details and complete picture of plant immunity emerges, ultimately to engineer new strategies to improve crop productivity and sustainability
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
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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