1,954 research outputs found
Gendered Science: Trends and analysis of contributions of Indian Women Scientists
No full textAll the major world organizations have recognized the vital role that a woman plays in educating the entire family & also in maintaining its health in a developing country. Indian women have excelled in almost all fields they are storming Information and Technology field , the number of women in computing and internet industries has registered a sharp rise. While presenting the hardcore figures about the women’s enrollment in higher education system in different faculties; relative presence of women as scientific and technical staff in various institutions; recognition by various reputed national agencies; motivation and constraints to opt for science are also focused in this study. As an output Indicator, Publication analysis of Women scientist has also been presented
The review of studies of Divya cave: the longest cave in Perm region (Russia)
No full textAbstract The work presented is a review of modern research conducted in Divya Cave—the longest cave in Perm Region, the first mention of which dates back to the 70’s of the eighteenth century. The cave provides the richest material for geologists, karstologists and speleologists, since it is a relic of an ancient aquifer, in which almost all types of secondary calcite formations found in caves are collected. The remote location of the cave from roads and settlements has never been an obstacle for explorers. The first plan of Divya cave was drawn up in 1949. Subsequently, a lot of speleologists kept exploring the cave, but not all passages were marked on the latest maps. Hydrogeological and hydrochemical research was done for the first time in 1948, 1956, 1962 and 1967. Numerous springs between the village of Divya and Divya cave were surveyed, water temperature and flow rates were measured and the hydrochemical indicators of water in the cave lakes were studied. Findings of cryogenic calcite in 1968 prompted further research related to the study of cave deposits, using isotopic analysis methods, taking into account their dating, to determine the migration of permafrost boundaries. From 2016 to 2020 the authors of this article conducted a number of studies in Divya cave itself and in the surrounding area, namely, they carried out instrumental and semi-instrumental topographic surveys of the cave and the surface, followed by the creation of a combined plan, and also determined the absolute marks of the earth’s surface, the entrance, the roof and the base of the cave and the new data on the length of the cave were obtained. For the first time, isotopic studies of atmospheric precipitation, surface channel runoff (the Kolva river) and groundwater emerging to the surface near Divya cave were carried out, and their relationship was determined. Data on the chemical composition of waters were supplemented. Samples of speleothems, including cryogenic calcite, were selected, their isotopic composition was studied and dating was carried out, which made it possible to obtain completely new information about interglacial periods. The modern data obtained allowed us to supplement previously known information about Divya cave
Brachinus (Brachynolomus) devagiriensis Akhil & Divya & Sabu 2020, sp. nov.
No full textBrachinus (Brachynolomus) devagiriensis sp. nov. Fig. 4 Type material. Holotype (male) labelled: “ Male; India: Kerala: Pattambi (KAU Campus, 10°48’42.9”N 76°11’25.7”E), ‘Light’, 14.XI.2016, coll. and det. S. V. Akhil ”, deposited in ZSIC; Paratypes labelled “ Female, India: Kerala: Pattambi (KAU Campus, 10°48’42.9”N 76°11’25.7”E), ‘ Light’, 14.XI.2016, coll. and det. S. V. Akhil ”, deposited in ZSIC; labelled: “ Male; India: Kerala: Peruvannamoozhi (IISR station, 11°36’26.0”N 75°49’24.9”E), 02.ii.2017, coll. V. A. Jithmon, det. S. V. Akhil ” deposited in ZSIC. Description: Length (TLA) 5.8–6.1 mm. Head, pronotum, scutellum and region around scutellum dark reddish brown; first two segments of antennae, palpi and legs pale reddish yellow (apical segments of palpi darker); femur, apex of tibiae and tarsi dark brown; antennal segments 3–4 dark reddish yellow, rest of the antennal segments reddish brown; lateral margin of pronotum and elytra black; eyes pitch black; genae, gula and prosternum dark reddish yellow; mesosternum, metasternum and abdominal ventrites brownish yellow. Head broad, wider than long, sparsely pubescent, smooth, with very faint wrinkles; frons with frontal foveae setose, shallow, densely punctated (mid region finely punctated, with short setae), smooth; vertex very faintly wrinkled, glabrous; neck rough, densely punctated, pubescent; labrum rectangular, transverse, anterior margin straight, apical angles almost at right angle, having six setae at anterior margin with two long setae at the corners, four (2 long, 2 intermediate) setae in the middle, rest glabrous. Clypeus sub-rectangular, anterior angles obtuse, with one long setae on each lateral edge, minute setae in the anterior margin; fronto-clypeal suture well impressed, deep, intended. Mentum transverse with two triangular, large lateral lobes which are toothed laterally, a single long seta present at the apex of lateral tooth, rest of the mentum glabrous; lateral lobes pointed apically; mentum without median tooth. Submentum very narrow, glabrous. Antennae long, slender, reaching beyond the middle of elytra; segment 1 longest, segment 2 elongate oval, all the segments densely pubescent with a ring of long setae in the apex of the segments. Palpi with segment 2 longest, wide, rectangular; the entire segment pubescent, penultimate segment long, slender, in the shape of an inverted cone, apical segment conical, tapering towards apex. Mandibles stout, scrobe plurisetose, tip pointed, arcuate, not crossing. Eyes highly protruding, prominent. Genae evidently wrinkled except at the base, a few setae present below eyes, rest of the genae glabrous. Gula large, widening towards pronotum, gular suture divergent, well impressed. Pronotum shiny, as long as wide, disc punctated, sparsely pubescent, smooth without wrinkles; disc apically sinuate without forward projection on lateral region of apical margin, disc straight at base, hind angles rounded, blunt, right angled; disc broad, laterally with anterior two-thirds convex and posterior third narrowed, with parallel sides; surface of disc convex; median groove deep, reaching both apical and basal margin; lateral bead narrow, widest near apical region. Elytra subparallel, slightly narrowed towards base, shiny, densely punctated and densely pubescent with short yellow setae; humerus prominent, corners rounded; apex obliquely truncate without any re-entrant angle; scutellum long, narrow, pointed, glabrous; striations well marked, deep, carinate; intervals broad, convex/ carinate; suture not completely closed apically; setae present on striations as well as on intervals. Hind wings well developed. Legs strong, densely pubescent; protibial comb rounded with spur at the basal end of the comb. Two tibial spurs pointing inwards. Tarsi with article 1 longest, article 4 shortest. Ventrally, pronotum smooth, pubescent, punctate. Prosternal process prominent, pubescent, extending beyond procoxae, apex pointing downwards. Ventral region densely punctate, pubescent with golden brown setae; hind coxae contiguous; abdomen rounded till apex, apex pointed; mesepisternum prominent, long and broad. Sexual dimorphism. Symmetrically and diagonally arranged adhesive pads on male pro-tarsomeres 1, 2 and 3. Male genitalia. Median lobe (in lateral view) straight in the basal half, sharply curving downwards towards the apex, with apex blunt, pointing straight rather than downwards. Measurements. Holotype (male), TLA = 6.08 mm, TLB = 5.74 mm, PL = 1.10 mm, PW = 1.16 mm, EL = 3.60 mm, EW = 2.39 mm; Paratype (female), TLA = 5.81 mm, TLB = 5.74 mm, PL = 1.10 mm, PW = 1.18 mm, EL = 3.52 mm, EW = 2.48 mm. Distribution. INDIA: Kerala: Pattambi, Peruvannamoozhi. Collecting circumstances. Light-attracted, collected using low-intensity UV light trap. Etymology. Named after the host institution of the authors. Remarks. This new species is similar to B. dryas but differs in having rounded, obliquely truncate elytral apex without re-entrant angle, deeply impressed elytral striations, hind angle of pronotum right angled, blunt, not projecting laterally and strongly protruding eyes.Published as part of Akhil, S. V., Divya, M. & Sabu, K. Thomas, 2020, Bombardier beetles of genus Brachinus Weber, 1801 (Carabidae: Brachininae Brachinini) from India, pp. 576-600 in Zootaxa 4816 (4) on pages 595-598, DOI: 10.11646/zootaxa.4816.4.7, http://zenodo.org/record/395468
Merchants of Virtue
No full textMerchants of Virtue explores the question of what it meant to be Hindu in precolonial South Asia. Divya Cherian presents a fine-grained study of everyday life and local politics in the kingdom of Marwar in eighteenth-century western India to uncover how merchants enforced their caste ideals of vegetarianism and bodily austerity as universal markers of Hindu identity. Using legal strategies and alliances with elites, these merchants successfully remade the category of “Hindu,” setting it in contrast to “Untouchable” in a process that reconfigured Hinduism in caste terms. In a history pertinent to understanding India today, Cherian establishes the centrality of caste to the early-modern Hindu self and to its imagination of inadmissible others.
“A refreshingly different perspective on the history of caste and untouchability in India, enlarging the field of scholarship from its focus on the colonial era by telling us how precolonial configurations of power in the locality shaped the everyday experience of caste.” — GOPAL GURU, coauthor of The Cracked Mirror and Experience, Caste, and the Everyday Social
“This provocative and empirically rich study offers a plenitude of fascinating insights into aspects of western Indian history ca. 1800, from kingship and caste hierarchy to abortion and alcohol consumption. Particularly innovative is its focus on the critical role played by merchants in articulating social identities that became widespread in modern times.” — CYNTHIA TALBOT, author of The Last Hindu Emperor
“A pathbreaking book that explodes essentialist views of the construction of Hindu and Muslim identities in precolonial India. Divya Cherian provocatively argues that the category of ‘Hindu’ was the primary locus for a system of radical othering that excluded Untouchables (and Muslims as Untouchables) through mechanisms of state, law, and everyday life.” — CHRISTIAN LEE NOVETZKE, Professor of South Asian and Religious Studies, University of Washingto
Merchants of Virtue
No full textMerchants of Virtue explores the question of what it meant to be Hindu in precolonial South Asia. Divya Cherian presents a fine-grained study of everyday life and local politics in the kingdom of Marwar in eighteenth-century western India to uncover how merchants enforced their caste ideals of vegetarianism and bodily austerity as universal markers of Hindu identity. Using legal strategies and alliances with elites, these merchants successfully remade the category of “Hindu,” setting it in contrast to “Untouchable” in a process that reconfigured Hinduism in caste terms. In a history pertinent to understanding India today, Cherian establishes the centrality of caste to the early-modern Hindu self and to its imagination of inadmissible others.
“A refreshingly different perspective on the history of caste and untouchability in India, enlarging the field of scholarship from its focus on the colonial era by telling us how precolonial configurations of power in the locality shaped the everyday experience of caste.” — GOPAL GURU, coauthor of The Cracked Mirror and Experience, Caste, and the Everyday Social
“This provocative and empirically rich study offers a plenitude of fascinating insights into aspects of western Indian history ca. 1800, from kingship and caste hierarchy to abortion and alcohol consumption. Particularly innovative is its focus on the critical role played by merchants in articulating social identities that became widespread in modern times.” — CYNTHIA TALBOT, author of The Last Hindu Emperor
“A pathbreaking book that explodes essentialist views of the construction of Hindu and Muslim identities in precolonial India. Divya Cherian provocatively argues that the category of ‘Hindu’ was the primary locus for a system of radical othering that excluded Untouchables (and Muslims as Untouchables) through mechanisms of state, law, and everyday life.” — CHRISTIAN LEE NOVETZKE, Professor of South Asian and Religious Studies, University of Washingto
Improved collision detection in StarLogo Nova
No full textThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (page 65).StarLogo Nova is blocks-based educational software that allows students to write and play their own 3D games online. It is the online version of StarLogo TNG. This thesis explores the problem of needing more accurate collision detection in StarLogo Nova while maintaining reasonable performance. Three new collision detection systems for StarLogo Nova are developed and evaluated. Compared to the spheres used to perform collision checks in the current system, the first new system, called the TightestFitCollider, introduces a variety of bounding spheres, bounding boxes, and bounding capsules as bounding structures that may fit the models in StarLogo Nova more closely. The second system, called the HierarchicalCollider, uses hierarchies of bounding boxes to perform even more precise collision detection than the TightestFitCollider. Finally, the third system combines the first two systems, so that the advantages of each can be used as appropriate. The three systems are evaluated for their accuracy and performance within the StarLogo Nova framework.by Divya Bajekal.M. Eng
Brachinus (Cnecostolus) geiseri Hrdlicka 2019
No full textBrachinus (Cnecostolus) geiseri Hrdlička, 2019 Brachinus geiseri Hrdlička, 2019: 80. Type locality. India: Pune; coll. P. V. Joshi Type depository. BMNH Specimen examined. No specimens seen, description summarized from Hrdlička (2019). Description. Length: 9.8 mm. Head, pronotum and mandibles rusty red; antennomeres 1–4 yellow, 5–11 yellow brown; elytra black with four yellow spots; legs yellow. Head longer than wide, frons (anteriorly), neck (entirely) punctuate, sparsely pubescent. Pronotum longer than wide; apical margin straight with lateral region projecting forward, basal margin sinuate; disc convex, slightly matt, punctated pubescent, laterally with anterior three-fourths convex, posterior fourth divergent; median groove uniformly deep, reaching the apical and basal margins. Elytral disc matte, punctate, pubescent; base narrowed, apex wide, widest just before apex; humerus with corners rounded; apex without re-entrant angle. Distribution. INDIA: Maharashtra: Pune. Remarks. This species is close to B. illotus Chaudoir, 1876 among the described Indian Brachinus. Brachinus illotus differs by having a smaller form, elytra having lateral reddish yellow margins, elytral apex straightly truncate, reddish yellow spot near to elytral apex smaller, and flattened pronotal disc. For further description of the species see Hrdlička (2019).Published as part of Akhil, S. V., Divya, M. & Sabu, K. Thomas, 2020, Bombardier beetles of genus Brachinus Weber, 1801 (Carabidae: Brachininae Brachinini) from India, pp. 576-600 in Zootaxa 4816 (4) on page 582, DOI: 10.11646/zootaxa.4816.4.7, http://zenodo.org/record/395468
Extremal probability bounds in combinatorial optimization
No full textIn this paper, we compute the tightest possible bounds on the probability that the optimal value of a combinatorial optimization problem in maximization form with a random objective exceeds a given number, assuming only knowledge of the marginal distributions of the objective coefficient vector. The bounds are 'extremal' since they are valid across all joint distributions with the given marginals. We analyze the complexity of computing the bounds, assuming discrete marginals, and identify instances when the bounds are computable in polynomial time. For compact 0/1 V-polytopes, we show that the tightest upper bound is weakly NP-hard to compute by providing a pseudopolynomial time algorithm. On the other hand, the tightest lower bound is shown to be strongly NP-hard to compute for compact 0/1 V-polytopes by restricting our attention to Bernoulli random variables. For compact 0/1 H-polytopes, for the special case of PERT networks arising in project management, we show that the tightest upper bound is weakly NP-hard to compute by providing a pseudopolynomial time algorithm. The results in the paper complement existing results in the literature for computing the probability with independent random variables.</p
Mixed ligand complex equilibria and coordination tendencies of CoII, NiII, Cull and ZnII with L-glutamine/L-citrulline and uracil
No full textDepartment of Chemistry, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India
United Institute of Technology, Naini, Allahabad-211 002, Uttar Pradesh, India
E-mail : [email protected]
Manuscript received online 27 October 2012, revised 16 November 2012, accepted 30 November 2012
The speciation, plausible equilibrium and solution structural study of mixed-ligand complexes of L-glutamine/ L-citrulline and uracil has been investigated by potentiometry involving CuII, ZnII , Nill and CoII metal ions. The overall stability constants of ternary complexes have been determined in biologically relevant conditions and at ionic strength of 0.1 M NaNO3. The models containing different numbers of species were refined by using the computer program SCOGS. The stability constants and complexation equilibria for the best-fit chemical models were arrived at based on statistical parameters. The trend in variation of stability constants of 1 : 1 : 1 L-Gln/L-Cit(A) : MII : uracii(B) evidenced as ACuIIB > AZnIIB > ANiIIB > ACoIIB; is attributed to the electrostatic and non-electrostatic forces
Posterior chamber phakic intraocular lenses in refractive surgery: Preoperative profile and postoperative outcomes
No full textObjective: To assess the pre operative visual, refractive and topographic profile and to analyse postoperative vision, contrast and complications of patients undergoing phakic intraocular lens implantation. Methods: This prospective study enrolled patients that underwent phakic intraocular lens implantation after refractive surgery work up. The corrected pre op and uncorrected post op distance visual acuity, pachymetry, keratometry, topography, white to white, anterior chamber depth, and specular microscopy, along with postoperative anterior chamber angles, corneal and lens status and vaulting of the phakic IOL were recorded at 1 month. Results: 59 eyes of 32 patients with myopia, simple and compound myopic astigmatism underwent posterior chamber phakic IOL. The average sphere corrected was -8.4 D and the average cylinder was -1.5 D with 45.8 +/- 2.2 being the average steep k values. The mean central corneal thickness, WTW and ACD in these patients were 511.9 +/-42,11.44 +/- 0.65 mm, 3.24 +/- 0.33 mm respectively. The average post op UCDVA was 0.1 logmar with most eyes gaining more lines than preop CDVA. The average post op phakic IOL vault wrt the natural lens was 455 micron and average IOP 13.74 +/- 2.8 mmHg. Conclusion: Posterior chamber phakic IOLs are a safe and predictable means of providing good vision especially in high myopes with borderline corneae. Accurate preoperative sizing of the lens is key to optimum results
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