5,066 research outputs found
Bibliographics for the 983 eprints in the live archives of E-LIS : trends and status report up to 7th July 2004, based on author-self-archiving metadata
No full textThe priority for ideas and philosophy related to "Network Theory" have been traced back and documented by Braun(2004),and credit goes to Karinthy(1929).The IT has empowered to realise it, as the most practical phenomena and it is no more a humour. The OAI (Open Archives Initiatives)and ACIS (Academic Contributor Information System)are progressive in the direction ,which may lead to realise the "Collective Genius" at global level. Focus of present study is on Author-Self-Archiving (A-S-A)Metadata of the 983 Eprints in the Live Archives of the E-LIS (EPrints of Library and Information Science),which were approved till 7th July 2004.The A-S-A Metadata was used for librametric analysis. Self-explanatory bibliographics are illustrated.The highlights include: Conference papers (34%); highest approval, June 2004 (28%); published archives (76%);not refereed (52%); not in public domain (60%); highest self-archiving-author (De Robbio, Antonella).The Nos. of EPrints having single JITA domain specifications were: Theoretical and general aspects of libraries and information(27); Information use and sociology of information(80);Users,literacy and reading(13);Libraries as physical collections(30);Publishing and legal issues(57);Management(13);Industry, profession and education(36);Information sources, supports, channels(113) ; Information treatment for information services, Information functions and techniques (101); Technical services libraries, archives and museums(25); Housing technologies(1); Information technology and library technology(92); and Inter-domainery (395) i.e. having specifications of two or more than two JITA classes
Scientometric Portrait of Homi Jehangir Bhabha: The Father of Indian Nuclear Research Programme
No full textQuantitative and qualitative analysis with graphic representation of the publication productivity of a scientist facilitates easy and clear perception about the work of a scientist. Bhabha’s scientific work spanned over more than three decades (1933-1967) during which he published 104 publications, which could be classified into nine fields: Interaction of Radiation with Matter (4), Quantum Electrodynamics (5), Mathematical Physics (2), Cosmic Ray Physics (18), Elementary Particle Physics (14), Field Theory (15), General Physics (2), Nuclear Physics (4) and General (40). The highest number of publications (6) were published in 1941, 1945 and 1964 respectively. The average number of publications published per year was 3.05. His productivity coefficient was 0.05 which is a clear indicates that his publication productivity was quite consistent throughout his scientific career. He was single author in 79 of his publications and the main author in 24 publications indicates that he always preferred to work himself and lead the team as ‘mentor’. Bhabha had 22 collaborators during the period. Team of research collaborators working with a successful scientist documents the sociological aspect of history of science while generating knowledge by a leader in a domain.
Bhabha became a citable author in 1937. Bhabha received 1211 citations to his 30 publications out of 104 publications. Out of 104, 74 publications did not receive any citations. Out of 74 publications, 40 publications dealt subjects mainly of general interest. Bhabha’s 86.66 percent of cited publications received their first citations within four years of their publication indicates that his publications were noticed immediately and had direct impact among the fellow researchers working all over the world. His overall citation rate was 11.64 per cited publication. The highest citations 389 were received to the domain ‘Cosmic ray physics’. The highest number of citations received were 45 in 1938. His self-citations were only 24 (1.98%) and citations by others were 1187 (98.02%). The highest self citations were six in 1946. Bhabha’s mean diachronous self-citation rate was 1.98. The highest citation rate 28.4 was to the domain ‘Quantum electrodynamics. His single authored publications have received the highest number 863 (71.26%) of citations. Bhabha’s five publications have been cited more than 100 times each. His publications have been cited by the authors working in various diverse fields like nuclear physics, mathematical physics, instrumentation, optics, geophysics and geochemistry, condensed matter physics, applied physics, electrical and electronic engineering, mechanical engineering etc., indicating a very diverse influence and impact of Bhabha’s publications. Bhabha’s publications have also been cited by the Nobel laureates like V. L. Ginzberg, Wolfgang Pauli, H. A. Bethe, M. Born, W. Bothe, E. P. Wigner, H. Yukawa, P. M. S. Blackett and C. N. Yang which is an indication of his originality of ideas and high quality of publications
Locally Recoverable Streaming Codes for Packet-Erasure Recovery
No full textStreaming codes are a class of packet-level erasure codes that are designed with the goal of ensuring recovery in low-latency fashion, of erased packets over a communication network. It is well-known in the streaming code literature, that diagonally embedding codewords of a [τ+1,τ+1-a] Maximum Distance Separable (MDS) code within the packet stream, leads to rate-optimal streaming codes capable of recovering from a arbitrary packet erasures, under a strict decoding delay constraint τ. Thus MDS codes are geared towards the efficient handling of the worst-case scenario corresponding to the occurrence of a erasures. In the present paper, we have an increased focus on the efficient handling of the most-frequent erasure patterns. We study streaming codes which in addition to recovering from a>1 arbitrary packet erasures under a decoding delay τ, have the ability to handle the more common occurrence of a single-packet erasure, while incurring smaller delay r<τ. We term these codes as (a,τ,r) locally recoverable streaming codes (LRSCs), since our single-erasure recovery requirement is similar to the requirement of locality in a coded distributed storage system. We characterize the maximum possible rate of an LRSC by presenting rate-optimal constructions for all possible parameters {a,τ,r}. Although the rate-optimal LRSC construction provided in this paper requires large field size, the construction is explicit. It is also shown that our (a,τ=a(r+1)-1,r) LRSC construction provides the additional guarantee of recovery from the erasure of h, 1 ≤ h ≤ a, packets, with delay h(r+1)-1. The construction thus offers graceful degradation in decoding delay with increasing number of erasures
sj-docx-2-spo-10.1177_17479541221131650 - Supplemental material for Sex-based differences in concussion incidence and its underlying injury mechanism in team bat/stick sports: A systematic review and meta-analysis
No full textSupplemental material, sj-docx-2-spo-10.1177_17479541221131650 for Sex-based differences in concussion incidence and its underlying injury mechanism in team bat/stick sports: A systematic review and meta-analysis by Vasanth Sundaram, Akhilesh Kumar Ramachandran, Utkarsh Singh and Alan J Pearce in International Journal of Sports Science & Coaching</p
sj-docx-1-spo-10.1177_17479541221131650 - Supplemental material for Sex-based differences in concussion incidence and its underlying injury mechanism in team bat/stick sports: A systematic review and meta-analysis
No full textSupplemental material, sj-docx-1-spo-10.1177_17479541221131650 for Sex-based differences in concussion incidence and its underlying injury mechanism in team bat/stick sports: A systematic review and meta-analysis by Vasanth Sundaram, Akhilesh Kumar Ramachandran, Utkarsh Singh and Alan J Pearce in International Journal of Sports Science & Coaching</p
Anil Kumar Lala (1950–2004)
No full textAnil Kumar Lala, Professor of Chemistry at the Indian Institute of Technology (IIT), Bombay died on 17 July 2004, following a stroke that he suffered three weeks earlier. Born on 13 January 1950, Lala did his B Sc from Delhi University and obtained his Ph D in 1974,working under the supervision of A. B. Kulkarni at Bombay University. His doctoral work was in the area of steroid chemistry, introducing him to the areas of NMR spectroscopy and mass spectrometry. Following a year at the Central Drug Research Institute in Lucknow, Lala moved to the State University of Ghent, Belgium,to work with Marc Anteunis. I first saw his name in a scientific publication,when the conformational analysis of methionine enkephalin, then recently discovered as the endogeneous ligand for the opioid receptor, was described by the French and Belgian groups, with Lala as a co-author (Roques, B. P. et al., Nature,1976, 262, 778). In 1976, he moved to Harvard University to work with Konrad Bloch and it is this period, which sparked his lifelong interest in membranes, specifically lipid–protein interactions. Lala joined the chemistry department at IIT,Mumbai in 1979 and it was here that he spent the remaining 25 years of his scientific career
Kudakrumia rangnekari Kumar & Lelej & Das & Raveendran & Loktionov 2019, sp. nov.
No full text<i>Kudakrumia rangnekari</i> Girish Kumar & Lelej, sp. nov. <p>(Figs. 1–10)</p> <p> <b>Type material.</b> Holotype ♂, mounted on card stock, <b>India</b>: Goa, South Goa district, Kotigao Wildlife Sanctuary (14°58’36’’N 74°12’22’’E, 108 m), 18.v.2018, Coll. P. Girish Kumar, ZSIK Regd. No. ZSI/ WGRC /IR/INV.12178. Paratype ♂, <b>India</b>: Kerala, Kasaragod district, Ranipuram Hill (12°24’56’’N 75°21’11’’E, 901 m), 21.i.2018, Coll. P.M. Rajan, ZSIK Regd. No. ZSI/ WGRC /IR/INV.12179.</p> <p> <b>Diagnosis</b>. Male. This new species is characterized by the following combination of characters: metasomal sternum 1 basally with distinct, long process (Fig. 1); metapleuron uniformly punctured, except median small smooth area (Fig. 5); propodeum punctate laterally (near metapleuron) (Fig. 5); propodeum strongly punctate without microsculptures (Fig. 5); parapenial lobe of basiparamere apically not modified, simple (Fig. 10). Female unknown.</p> <p> <b>Description</b>. Holotype male. Length: 3.28 mm. Body black but mandible except base, scape, pedicel and flagellum beneath brownish red; palpi, tegulae and legs testaceous except mesocoxa partially, metacoxa, apical half of mesofemur, metafemur almost entirely, meso- and metatibia except base, protarsomere 2–5, meso- and metatarsomere 1–5 black. Vestiture short and silvery, moderately dense and appressed on most of body, sparse erect setae also present between punctures. Wings hyaline, veins testaceous.</p> <p> <i>Head.</i> Sculpture dense, fine, at higher magnification polygonal in shape (Fig. 2); eye setae length about half frons setae length; apical clypeus margin not emarginated; mandible with three teeth; POL 0.605 × OOL; POL 1.619 × LOL; POL 2.44 diameter of posterior ocellus; scape (Fig. 3) 1.59 × as long as wide, inner lateral margin carinate, inner surface of flagellomeres 2–10 with few shorter, stouter setae.</p> <p> <i>Mesosoma</i>. Notauli almost touching anterior border of mesoscutum, parapsidal lines two-thirds of mesoscutum length, dorsum with slightly larger, more separated punctures, with microsculpture similar to that of head (Fig. 4); propodeum strongly punctate without microsculptures; metapleuron uniformly punctured, except median small area smooth. Forewing as in Fig. 6; basal part of medial vein of hindwing curved but not angulate (Fig. 7).</p> <p> <i>Metasoma</i>. First two metasomal terga with fine, subcontiguous punctures, with microsculpture almost similar to that of mesosomal dorsum, remaining terga with finer, slightly separated punctures (Fig. 8); sternum 1 basally with distinct long process (Fig. 1); second sternum with larger subcontiguous punctures, remaining sterna with small subcontiguous punctures (Fig. 9). Genitalia as in Fig. 10. Parapenial lobe of basiparamere apically not modified, simple.</p> <p>Female. Unknown.</p> <p> <b>Etymology</b>. The species is named after Mr. Parag Rangnekar, a well-known butterfly and dragonfly specialist from Goa who helped the first author to conduct a collection tour in Goa state during which the holotype was collected.</p> <p> <b>Distribution</b>. India: Goa, Kerala.</p> <p> <b>Remark</b>. The differences between the male of this new species and <i>Kudakrumia mirabilis</i> are given in the key below.</p>Published as part of <i>Kumar, Girish P., Lelej, Arkady S., Das, Dipanwita, Raveendran, Hanima K. P. & Loktionov, Valery M., 2019, Discovery of the genus Kudakrumia Krombein, 1979 (Hymenoptera: Mutillidae) in India and description of a new species, pp. 260-266 in Zootaxa 4612 (2)</i> on pages 261-264, DOI: 10.11646/zootaxa.4612.2.8, <a href="http://zenodo.org/record/3234350">http://zenodo.org/record/3234350</a>
Reactions of (PCP)Ir complexes with small molecules:
No full textIridium pincer complexes (R4PCP)IrHn (PCP=[k3-2,6-C6H3(CH2PR2)]) are effective catalysts for the dehydrogenation of alkanes. We wished to design pincer ligands in which the set of phosphinoalkyl groups would offer (a) maximal steric "protection" against cluster-formation (b) minimal hindrance to C-H addition, and (c) resistance to decomposition and self-dehydrogenation (unlike iPr groups). Thus, we have synthesized iridium complexes of ligands tBu3MePCP ([C6H3(CH2PtBuMe)(CH2PtBu2]). (tBu3MePCP)IrH4 (1) shows more efficiency in dehydrogenation of alkanes than either
(tBu4PCP)IrHn or (iPr4MePCP)IrHn. (tBu3MePCP)IrH4 was also found to be a very effective catalyst in alkane metathesis.
Although isocyanides are important building blocks in organic synthesis, their commercial availability is limited compared to other chemicals. (PCP)Ir complexes react with different secondary methyl amines and at ambient temperature to form
corresponding iridium isocyanide complexes (PCP)Ir(H)(H)(CNR), 3-1 (a-e) which react with CO forming (PCP)Ir(CO) to liberate the corresponding isocyanide.
The addition of PhCCH to highly stable complexes, (PCP)IrL (L = CO, CNR), is challenging. (PCP)IrL (L = CO, CNR) complexes react with PhCCH in presence of acid to form complex (PCP)Ir(CO)(H)(CCPh) (5-3) and (PCP)Ir(CNBz)(H)(CCPh) (5-1), respectively, in which hydride and acetylide group are trans to each other. The reaction proceeds via the cationic intermediate [(PCP)Ir(CO)(H)]+. Solid-supported catalysts have significant advantages over homogeneous systems, particularly with respect to product-catalyst separation. We have investigated several routes to the development of supported pincer-ligated iridium catalysts. The p-dimethylamino- substituted PCP complex is found to bind strongly to alumina while maintaining the same high activity (or even slightly greater) for alkane-dehydrogenation as found in the solution phase.
A broad range of (PCP)Ir complexes with widely varying steric and electronic effects have been synthesized and studied including (PCP)IrL, (PCP)Ir(H)(H)L and PCP)Ir(H)(Cl)L, (L = various P- and N-donors, N2, various olefins). The relative thermodynamics of these adducts have been detected by equilibrium measurements and calculated using DFT. Precursors of "(PCP)Ir" cleaves sp3 C--O bonds of various esters (RCO2R1, R1= alkyl) to give (PCP)Ir(R1)(O2CR) or, in cases where R1 has a b-hydrogen, (PCP)Ir(H)(O2CR) plus the corresponding alkene derived from R1.Ph.D.Includes bibliographical referencesby Sabuj Kumar Kund
Ionic Liquid-Assisted Fabrication of Bioactive Heterogeneous Magnetic Nanocatalyst with Antioxidant and Antibacterial Activities for the Synthesis of Polyhydroquinoline Derivatives
No full textAntibacterial materials have obtained much attention in recent years due to the presence of hazardous agents causing oxidative stress and observation of pathogens. However, materials with antioxidant and antibacterial activities can cause toxicity due to their low biocompatibility and safety profile, urging scientists to follow new ways in the synthesis of such materials. Ionic liquids have been employed as a green and environmentally solvent for the fabrication of electrically conductive polymers. In the present study, an antibacterial poly(p-phenylenediamine)@Fe3O4 (PpPDA@Fe3O4) nanocomposite was fabricated using [HPy][HSO4] ionic liquid. The chemical preparation of PpPDA@Fe3O4 nanocomposite was initiated through the oxidative polymerization of p-phenylenediamine by ammonium persulfate in the presence of [HPy][HSO4]. The PpPDA@Fe3O4 nanocomposite exhibited antibacterial properties against Gram-negative (Escherichia coli) and Gram-positive (Bacillus subtilis) bacteria. The PpPDA@Fe3O4 nanocomposite was employed as a heterogeneous nanocatalysis for one-pot synthesis of polyhydroquinoline derivatives using aromatic aldehyde, dimedone, benzyl acetoacetate, and ammonium acetate. Polyhydroquinoline derivatives were synthesized in significant yields (90–97%) without a difficult work-up procedure in short reaction times. Additionally, PpPDA@Fe3O4 nanocatalyst was recycled for at least five consecutive catalytic runs with a minor decrease in the catalytic activity. In this case, 11 derivatives of polyhydroquinoline showed in vitro antioxidant activity between 70–98%
FIGURE 7. A–C in Conidae (Mollusca, Gastropoda) of Lakshadweep, India
No full textFIGURE 7. A–C, Conus miles Linnaeus, 38x22 mm. Minicoy. (DABFUK, No. 92). D–F, C. milneedwardsi Jousseaume, 128x35 mm. Minicoy. (DABFUK, No. 93). G–I, C. nussatella Linnaeus, 66x24 mm. Minicoy. (DABFUK, No. 94). J–L, C. parvatus Walls, 18x9 mm. Minicoy. (DABFUK, No. 95). M–O, C. pennaceus Born, 52x29 mm. Bitra. (DABFUK, No. 98). P– R, C. rattus Hwass in Bruguière, 22x13 mm. Bitra. (DABFUK, No. 99).Published as part of Ravinesh, Raveendhiran, Kumar, Appukuttannair Biju & Kohn, Alan J., 2018, Conidae (Mollusca, Gastropoda) of Lakshadweep, India, pp. 467-494 in Zootaxa 4441 (3) on page 486, DOI: 10.11646/zootaxa.4441.3.3, http://zenodo.org/record/130152
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