1,884 research outputs found
Comparison of several author indices for gauging academic productivity
No full textBackground
Many author indices exist to gauge academic productivity. Several of these indices are calculated based upon an author's scholarly publication record, but the measurement methodology to calculate each index varies considerably, and the precise function being used, as well as the end result, is often complex and difficult to assess.
Method
Two straightforward methods to weigh author productivity from the publication and citation record were evaluated as possible means for providing a clearer assessment of scholarly activity. The author characteristic index (termed c-index) assigns author rank for each publication based upon author position. The characteristic prime (c') -index normalizes author rank from author position, so that the total weight per publication is unity. The top 10 scholars with keyword 'celiac disease' in the Google Scholar database were then assessed using these metrics. Rankings according to total number of publications, h-index, and c- and c'-indices were compared, then tabulated along with total papers included for assessment, and mean values per paper for author position, number of authors, citations, and year of publication.
Results
The order of the top ten authors with keyword 'celiac disease' varied substantially depending upon whether the h-index, c-index, or c'-index was used as a gauge. The characteristic indices assign credit to authors according to their position in an author list. The affiliated metrics provided a more complete picture of scholarly activity.
Conclusions
Academic achievement by scholars, based upon quantitative publication characteristics, has recently become of interest for evaluating job candidates, for determining work performance, and for bestowing awards and honors. The characteristic indices as described herein are readily calculated and interpreted, and may improve the assessment of scholarly activity
Myristica pushpangadaniana Govind, nom. nov.
No full textMyristica pushpangadaniana Govind & M.Dan, nom. nov. (Figs 2, 3) Type:— INDIA. Tamil Nadu: Thirunelveli, 1976, Kostermans 26276 (holotype: L, online image!; isotype: K!) Replaced name: M. beddomei subsp. spherocarpa W.J.deWilde, non Myristica sphaerocarpa Wallich (1830: 79) Evergreen, dioecious trees, 20–35 m tall, branching usually whorled, main trunk 90–120 cm in diameter; bark rough, brown; exudate orange-red, viscous. Leaves alternate, petiolate; petiole 3.5–4.2 cm long, round to shallowly grooved, glabrous; lamina 8–10 × 4–6 cm, broadly lanceolate, apex acute to acuminate, margin undulate, base rounded, adaxially dark green, gland-dotted, abaxially glaucous, glabrous; midvein prominent, lateral veins not prominent, 8- 13 paired. Male inflorescence 2–3-flowered, axillary umbel; peduncle erect, 2 cm long, cylindrical, scurfy tomentose. Flowers caducous, urceolate, longer than broad, 4.1-4.3 × 2.3–3.0 mm, brownish yellow, pedicellate; pedicel 7–10 mm long, pubescent; bracteole 2.1–3.0 × 2.2–3.1 mm, ovate, acute at apex, appressed to the base of male flower, dorsally convex, brownish yellow, densely pubescent outside, persistent. Perianth trilobed, equal, acute, curved outward, brownish yellow, densely pubescent outside; staminal column 3–5 mm long, cylindrical, pilose up to anthers from base; anthers 12–13. Female inflorescence 2-flowered, axillary umbel; peduncle erect, 3 mm long, cylindrical, puberulous; flowers urceolate, 4.2–6.1 × 4.0–5.0 mm, yellow, persistent, pedicellate; pedicel up to 5 mm long, pubescent; perianth trilobed, equal, acute, curved outward, scabrid outside; stigma bilobed; ovary ovate, 2–3 mm, densely tomentose. Fruits usually solitary, rarely in pairs, dehiscent, 2.5–4.0 × 3.5–5.0 cm, subglobose to globose, brown, apex obtuse, base round, longitudinal suture on both sides, scurfy pubescent; rind 7–10 mm thick, brown; seed 2.0–3.6 × 2.5–4.0 cm, oblong, black, arillate; aril partially covering seed, yellow turning orange-red, lacerate. Distribution:— Endemic to the southern Western Ghats at 900-1100 m. Phenology:— Flowering August–November, fruiting March–June. Etymology:— Named in honour of Padma Shri Dr. P. Pushpangadan, former Director of JNTBGRI, Palode and CSIR-NBRI, Lucknow, India, a renowned Indian ethnobotanist. Notes:— Based on detailed morphological evaluation and comparison with M. beddomei, this subspecies differs in key characters, smaller leaves (7–10 × 3–5.5 cm), fewer lateral veins (8–13 pairs), more anthers (13), globose fruits and seeds partially covered by aril (Figs 2, 3, 4; Table 1). The chemical profile of essential oils isolated from rind, aril, seed and leaf of M. beddomei subsp. beddomei and M. beddomei subsp. ustulata was found to be similar, whereas that of M. beddomei subsp. spherocarpa was different. In M. beddomei subsp. spherocarpa , monoterpenes, phenyl propanoids and aliphatic hydrocarbons were absent in the leaf and seed essential oil, whereas these compounds were present in M. beddomei subsp. beddomei and M. beddomei subsp. ustulata. In the rind essential oil of M. beddomei subsp. beddomei and M. beddomei subsp. ustulata , E-caryophyellene and α-terpineol were the major compounds, whereas in M. beddomei subsp. spherocarpa, E-nerolidol and linalool were the major compounds. Likewise, in the arils of M beddomei subsp. beddomei and M. beddomei subsp. ustulata , α-humulene was the major compound followed by trans-α-bergamotene, to the contrary, E-caryophyellene and αhumulene were the major compounds in M. beddomei subsp. spherocarpa giving it a distinct chemical profile. The dissimilarities of chemical profile in M. beddomei subsp. spherocarpa combined with the morphological differences are supporting evidence for its elevation to species level. Petiole cross sections of M. beddomei subsp. beddomei and M. beddomei subsp. ustulata were grooved and glabrous. That of M. beddomei subsp. spherocarpa was round to shallowly grooved and had epidermal trichomes. Five vascular bundles were observed in M. beddomei subsp. beddomei and M. beddomei subsp. ustulata , two at adaxial side, one at abaxial side and one each on each side. A lunar type of arrangement of phloem patches occurs in the pith region. The anatomical features of the petiole of M. beddomei subsp. spherocarpa were found different from the other two subspecies. The petiole was almost circular in outline with shallow groove. Three vascular bundles are enclosed in separate sclerenchyma patches, one large in the pith region and a small vascular bundle on each side. The anatomical characters in the petiole of M. beddomei ssp. spherocarpa are distinct from that of M. beddomei ssp. beddomei and ssp. ustulata (Fig. 5). Other specimens examined:— INDIA. Near Agasthyarkoodam, Thirunelveli district, May 2019, Govind 91047 (TBGT). Kerala: Chemunji hills, Bonaccadu, Thiruvananthapuram, Apr 2019, Govind 91046 (TBGT).Published as part of Govind, Murugan Govindakurup & Dan, Mathew, 2022, Status of the subspecies of Myristica beddomei (Myristicaceae), endemic to the Western Ghats, India, pp. 261-269 in Phytotaxa 541 (3) on pages 262-263, DOI: 10.11646/phytotaxa.541.3.5, http://zenodo.org/record/639264
GOVIND SWARUP - Bibliography from GOVIND SWARUP. 23 March 1929 — 7 September 2020
No full textProfessor Govind Swarup was a distinguished radio astronomer who drove the development of the field in India. Over a long career he built the Ooty Radio Telescope (ORT) and the Giant Metrewave Radio Telescope (GMRT), which are world-class facilities. Swarup was born in North India, had his undergraduate and post-graduate education at the University of Allahabad and then joined the National Physical Laboratory at New Delhi. He then travelled on a fellowship to Australia, to work on radio astronomy under J. L. Pawsey (FRS 1954). Later, in the USA, he completed his PhD with Ronald N. Bracewell at Stanford. Govind then accepted an offer made by Homi Bhabha FRS to begin radio astronomy work at the Tata Institute of Fundamental Research (TFIR). At TIFR, Govind conceived and built a novel, low cost, equatorially mounted cylindrical radio telescope, the ORT. The ORT was a versatile instrument and fuelled the growth of radio astronomy in India. In the late 1980s he conceived and led the construction of the GMRT, which again was based on a pioneering design. The GMRT is a remarkably successful instrument used by radio astronomers across the world. Govind Swarup has left behind a large group of radio astronomers who have continued his work and are finding new directions
Spintronics and quantum computation
No full textAn effort has been made to discuss a new class of devices based on electron spin. In the present review, several proposed spintronic devices have been studied which can help in providing new functions and an improvement over the existing electronic devices.Author Affiliation: Govind and S K Joshi
Theory Group, National Physical Laboratory,
Dr. K. S. Krishnan Marg, New Delhi-110 012, India
E-mail : [email protected] Group, National Physical Laboratory,
Dr. K. S. Krishnan Marg, New Delhi-110 012, Indi
Influence of the substitution pattern on exciton localisation in centro-symmetric quadrupolar dyes
No full textData presented in: 'Influence of the substitution pattern on exciton localisation in centro-symmetric quadrupolar dyes', C. Govind, K. Skonieczny, D. T. Gryko and E. Vauthey, Phys. Chem. Chem. Phys. 2026, 28,https://doi.org/10.1039/D6CP00121
Importance of Glutamate Dehydrogenase (GDH) in Clostridium difficile Colonization In Vivo
No full textCitation: Girinathan, B. P., Braun, S., Sirigireddy, A. R., Lopez, J. E., & Govind, R. (2016). Importance of Glutamate Dehydrogenase (GDH) in Clostridium difficile Colonization In Vivo. Plos One, 11(7), 18. doi:10.1371/journal.pone.0160107Clostridium difficile is the principal cause of antibiotic-associated diarrhea. Major metabolic requirements for colonization and expansion of C. difficile after microbiota disturbance have not been fully determined. In this study, we show that glutamate utilization is important for C. difficile to establish itself in the animal gut. When the gluD gene, which codes for glutamate dehydrogenase (GDH), was disrupted, the mutant C. difficile was unable to colonize and cause disease in a hamster model. Further, from the complementation experiment it appears that extracellular GDH may be playing a role in promoting C. difficile colonization and disease progression. Quantification of free amino acids in the hamster gut during C. difficile infection showed that glutamate is among preferred amino acids utilized by C. difficile during its expansion. This study provides evidence of the importance of glutamate metabolism for C. difficile pathogenesis
Myristica beddomei King 1891
No full textMyristica beddomei King (1891: 291). (Fig. 1) Type:— INDIA. Karnataka, 20 Nov 1882, Talbot s.n. (holotype: K000880079, online image K!). Heterotypic synonym: Myristica beddomei subsp. ustulata de Wilde (Fig. 1). Type:— INDIA. Tamil Nadu: Anamalais, 29 Oct 1974, Kostermans 25825 (holotype: L, online image!; isotypes: K, BM, online images!). Evergreen, dioecious trees, 20–35 m tall, branching usually whorled, main trunk 90–120cm in diameter; bark rough, brown; exudate orange-red, viscous. Leaves alternate, petiolate; petiole 3.5–4.2 cm long, deeply grooved, glabrous; lamina 15–20 × 6–10 cm, broadly lanceolate, apex acute to acuminate, margin undulate, base rounded, adaxially dark green, gland-dotted, abaxially glaucous, glabrous; midvein prominent, lateral veins adaxially prominent, 16-20 paired. Male inflorescence 3–4-flowered, axillary umbel; peduncle erect, 2 cm long, cylindrical, scurfy tomentose; flowers caducous, urceolate, 3.1–4.3 × 2.3–3.0 mm, brownish yellow, pedicellate; pedicel 7–10 mm long, pubescent; bracteole 2.1–3.0 × 2.2–3.1 mm, ovate, acute at apex, appressed to the base of male flower, dorsally convex, brownish yellow, densely pubescent outside, persistent; perianth trilobed, equal, acute, curved outward, brownish yellow, densely pubescent outside; staminal column 3–5 mm long, cylindrical, pilose up to anthers from base; anthers 9–10. Female inflorescence 2–3-flowered, axillary umbel; peduncle erect, 3 mm long, stout, cylindrical, puberulous; flowers urceolate, 4.2–6.1 × 4.0–5.0 mm, yellow, persistent, pedicellate; pedicel up to 5 mm long, pubescent; perianth trilobed, equal, acute, re-curved outward, scabrid outside; stigma short, bilobed; ovary ovate, 2–3 mm, densely tomentose. Fruits usually solitary, rarely in pairs, dehiscent, 4.0–6.0 × 3.5–4.0 cm, ovoid to subovoid, brown, apex obtuse, base round, longitudinal suture on both sides, scurfy pubescent; rind 7–10 mm thick, brown; seed 3.0–4.5 × 2.5–4.0 cm, oblong, black; arillate, aril completely covering seed, yellow turning orange-red, lacerate. Distribution:— Endemic to the southern Western Ghats at 700–1100 m. Phenology:— Flowering September–November and fruiting July–August. Notes:— Based on extensive field studies and detailed morphological studies on live specimens from type localities, it was clear that the key characters used by De Wilde to delimit M. beddomei subsp. ustulata from M. beddomei subsp. beddomei viz. 3–4 mm thick dry pericarp; 0.3–0.5 mm long, blackish brown hairs on male flowers and persistent bracteole could not be demonstrated. De Wilde did not describe female flowers of M. beddomei subsp. ustulata in the protologue. In this study, features of the female flowers of M. beddomei subsp. beddomei and M. beddomei subsp. ustulata were identical. Other specimens examined:— INDIA. Kudermukh, Aug 2018, Govind 93694 (TBGT); Tamil Nadu, Courtallum hills, 1873, Beddome s.n. (K, K000880077, online image); Thirunelveli, Kostermans s.n. (K000880916, online image K);Thirunelveli, Beddome s.n. (BM000950851, online image BM); Kothayar, KMTR,Anamali Hills, Feb 2019, Govind 93647 (TBGT); Malakkapara-Valpaarai, Feb 2018, Govind 91042 (TBGT); Kerala, Kurichiyarmala, Wayanadu, Jan 2019, Govind 93644 (TBGT); Pooncholamala, Wayanadu, March 2019, Govind 93690 (TBGT); Kothayar, KMTR, Anamali hills, Mar 2019, Govind 91044 (TBGT); Thirunelveli, Mar 2019, Govind & Anto 91045 (TBGT).Published as part of Govind, Murugan Govindakurup & Dan, Mathew, 2022, Status of the subspecies of Myristica beddomei (Myristicaceae), endemic to the Western Ghats, India, pp. 261-269 in Phytotaxa 541 (3) on pages 261-262, DOI: 10.11646/phytotaxa.541.3.5, http://zenodo.org/record/639264
Anti-Factor is FPT Parameterized by Treewidth and List Size (but Counting is Hard)
No full textIn the general AntiFactor problem, a graph is given with a set
of forbidden degrees for every vertex and the
task is to find a set of edges such that the degree of in is not in
the set . Standard techniques (dynamic programming + fast convolution) can
be used to show that if is the largest forbidden degree, then the problem
can be solved in time if a tree decomposition of width
is given. However, significantly faster algorithms are possible if the sets
are sparse: our main algorithmic result shows that if every vertex has at
most forbidden degrees (we call this special case AntiFactor), then the
problem can be solved in time . That is, the
AntiFactor is fixed-parameter tractable parameterized by treewidth and
the maximum number of excluded degrees.
Our algorithm uses the technique of representative sets, which can be
generalized to the optimization version, but (as expected) not to the counting
version of the problem. In fact, we show that #AntiFactor is already
#W[1]-hard parameterized by the width of the given decomposition. Moreover, we
show that, unlike for the decision version, the standard dynamic programming
algorithm is essentially optimal for the counting version. Formally, for a
fixed nonempty set , we denote by -AntiFactor the special case where
every vertex has the same set of forbidden degrees. We show the
following lower bound for every fixed set : if there is an such
that #-AntiFactor can be solved in time on a tree decomposition of width , then the Counting Strong
Exponential-Time Hypothesis (#SETH) fails.Comment: v2: Proof of Lemma 7.1 in Section 7.1 revised by adding more
intermediate steps, minor correction
Scientometric Insights into Research Contributions of Govind Ballabh Pant University of Agriculture and Technology
No full textThis study evaluates the research productivity and impact of Govind Ballabh Pant University of Agriculture and Technology using Scopus data (2001–2021). A total of 4,897 publications receiving 53,059 citations were analyzed with scientometric indicators including AGR, RGR, DT, collaboration measures, authorship, citations, and keywords. Results show a gradual growth in research output, with peak productivity during 2017–2021 and Kumar, A. as the most prolific author (165 publications)
Myristica pushpangadaniana M. G. Govind & Dan 2022
No full text<p> <i>Myristica pushpangadaniana</i> M.G.Govind & Dan in Kottaim., <i>nom. nov.</i></p> <p> Replaced name: <i>Myristica beddomei</i> King (1891: 291) subsp. <i>sphaerocarpa</i> W.J. de Wilde (1997: 152).</p> <p> <i>Myristica pushpangadaniana</i> M.G. Govind & Dan (2022: 262), <i>nom. inval.</i></p> <p> Type:— INDIA. Tamil Nadu, Tinnevely District (now Tirunelveli), 11 Jul 1976, 1110 m, Eastern slopes of Western Ghats, Walaiyar Cardamom estate, <i>Kostermans 26276a</i> (holotype: L, digital image with barcode L0037563!; isotype: K, digital image with barcode K000880916!; US, digital image with barcode US00516998!).</p> <p>Distribution: — INDIA (Karnataka, Kerala & Tamil Nadu), Endemic.</p>Published as part of <i>Kottaimuthu, Ramalingam, 2023, Validation of Myristica pushpangadaniana (Myristicaceae), pp. 133-134 in Phytotaxa 584 (2)</i> on page 133, DOI: 10.11646/phytotaxa.584.2.7, <a href="http://zenodo.org/record/7639441">http://zenodo.org/record/7639441</a>
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