82,593 research outputs found
Universal Statistical Properties of Inertial-particle Trajectories in Three-dimensional, Homogeneous, Isotropic, Fluid Turbulence
No full textWe obtain new universal statistical properties of heavy-particle trajectories in three-dimensional, statistically steady, homogeneous, and isotropic turbulent flows by direct numerical simulations. We show that the probability distribution functions (PDFs) P(Φ), of the angle Φ between the Eulerian velocity u and the particle velocity v, at a point and time, scales as P(Φ) ∼Φ−, with a new universal exponent ≃ 4
Study of microstructure of chill cast aluminium bronzes (Cu-AI-Fe-Mn)
No full textSUBSTANTIAL information is available on the microstru-ctures of high tensile aluminium -bronzes but most of
the literature is pertaining to the alloys containing nickel. Exhaustive amount of work was carried out by Gupta et al. at the National Metallurgical Laboratory
to study the mechanical properties of aluminium-bronze alloys in the chill-cast condition without nickel addition, the results of which have already been reported in an earlier paper. The present paper relates
to the study of microstructures of these chill-cast aluminium-bronze alloys. A few microstructures of
Cu-Al-Fe system have been given by Copper Development Association in their recent publication on aluminium-bronzes.
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Integrating R&D and marketing in new product development
No full textR&D - marketing integration is considered to be a critical activity within New Product Development (NPD). A theoretical framework for the study of R&D - marketing integration levels developed by Gupta et al (1986) is one of the most widely cited R&D - marketing integration frameworks in scientific literature. It is based on the presumption that strategy, environmental, organizational and individual factors are those determining R&D - marketing integration levels and consequently NPD success. Several empirical studies have been conducted to test this framework, however most of them have dealt only with portions of Gupta et al (1986)'s model. This paper is an attempt to put forward and test an integrated research protocol for the study of R&D - marketing integration, based on this theoretical framework. Empirical evidence gained from a questionnaire survey and two company case studies show, that people active within the R&D - marketing interface perceive the studied constructs as relevant for R&D - marketing integration, thus giving confirmation to Gupta et al (1986)’s model. The presented research protocol can therefore be considered as a valid start into R&D - marketing integration research within an integrated framework
Supplementary Materials: Kuo et al., How Students Blend Conceptual and Formal Mathematical Reasoning in Solving Physics Problems, accepted for publication in Science Education on 08/08/2012
No full textThis is supplemental material pertaining to the qualitative data presented in the manuscript:
Kuo. E., Hull, M. M., Gupta, A., & Elby, A., How Students Blend Conceptual and Formal Mathematical Reasoning in Solving Physics Problems, accepted for publication in Science Education on 08/08/2012.
The following material consists of 4 parts:
A. The context of the study (p. 2)
B. The question protocol that students were asked to answer. (pp. 3-4)
C. The transcript of Alex’s interview (pp. 5-17)
D. The transcript of Pat’s interview (pp. 18-31
Extracting Boer-Mulders functions from p+D Drell-Yan processes
No full textWe extract the Boer- Mulders functions of valence and sea quarks in the proton from unpolarized p + D Drell- Yan data measured by the FNAL E866 Collaboration. Using these Boer- Mulders functions, we calculate the cos2 phi asymmetries in unpolarized pp Drell- Yan processes, both for the FNAL E866/ NuSea and the BNL Relativistic Heavy Ion Collider experiments. We also estimate the cos2 phi asymmetries in the unpolarized p (P) over bar Drell- Yan processes at GSI.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)37ARTICLE5null7
Phanerotoma andamanensis Gupta
No full textPhanerotoma andamanensis Gupta & van Achterberg sp. nov. (Figs A–N) Measurements: Length of body in dorsal view 4.0 mm (holotype, Fig. A); 3.7 (paratype, Fig. G); 3.2 mm (paratype, male, Fig. J); antenna 3.1 mm (paratype, female) and fore wing 2.9 (holotype) or 2.5 mm (paratype, female). Female. Colour: Yellowish brown. Basal five segments and pedicel of antenna yellowish, remainder of antenna brown. Eyes and stemmaticum black. Pronotum pale testaceous; T 1 and T 2 pale testaceous; T 3 yellowish brown laterally, but medio-longitudinal third black; T 1 with H shaped mark medially. Tip of mandible dark brown. Pterostigma dark brown without distinct pale basal spot, only somewhat paler basally than medially; ocelli yellow; hind tibia medially pale yellow. Head (Fig. B): Width 1.3 times median length in frontal; antenna with 23 segments and 1.1 times as long as fore wing; area of stemmaticum punctate (Fig. D); OOL: diameter of posterior ocellus: POL= 6: 2: 1; vertex transversely rugose with fine granulate background anteriorly, setose; temple rugose; face rugose with median ridge and setose; clypeus smooth medially, shiny and setose; malar space rugose, lower tooth of mandible 0.25 times as long as apical tooth (Fig. C). Mesosoma (Fig. E): 1.4 times as long as wide; sides of pronotum coarsely crenulate with median depression dorsally; mesoscutum granulose-reticulate, setose; notauli distinct and foveate anteriorly, absent posteriorly; scutellar sulcus wide and with 9 crenulae; scutellum finely punctate and setose; metanotum with median ridge; propodeum coarsely reticulate rugose with distinct transverse carina below the median line, median carina absent, median areola just above transverse carina (open anteriorly). Fore wing 3.2 times as long as wide; length of 1 -R 1 1.5 times pterostigma; r issued much beyond middle of pterostigma; 2 -SR slightly sinuate; 3 -SR and SR 1 slightly curved; 2 -SR+M longitudinal; parastigma large and dark brown pigmented; m-cu interstitial; vein 1 -CU 1 0.8 times as long as vein 2 -CU 1; 3 -SR = 0.35 times as long as 1 -R 1 and 5.6 times r; r = 0.3 times as long as width of pterostigma; pterostigma 3 times longer than wide; 1 -R 1 = 1.5 times longer than pterostigma; inner mid tibial spur 0.6 times mid basitarsus; hind coxa finely punctate; hind femur 3.7 times its width. Metasoma (Fig. F): Oval in dorsal view and 1.8 times as long as wide, 1.2 times as long as mesosoma; first –second tergites longitudinally spaced rugose with some interconnections, second suture sinuate dorsally; third tergite longitudinally reticulate-rugose and truncate medio-posteriorly, its medial length 1.6 times medial length of second tergite, lateral lamella not protruding latero-apically; ovipositor exerted (0.16 mm in lateral view) and setose; exerted part of sheath 0.14 times as long as hind tibia. Male (Fig. J ): Similar to female except for smaller size and T 3 completely black (Fig. M). Note. The new species differs from all described Oriental species by the combination of the dark brown vein 1 - M and 1 -R 1 of the fore wing, the median third of the third tergite of female dark brown and contrasting with yellowish brown lateral parts and the rather long vein 1 -CU 1 of the fore wing. In the key to Indian species by Sheeba & Narendran (2008) the new species runs to P. buchneri Fahringer, 1932, from NE. India because of its size and the venation and to P. agarwali Varshney & Shujauddin, 1999, from N. India. P. buchneri has a rather pale 1 - R 1 (darkened in P. andamanensis), the pterostigma largely pale brown (dark brown), vein 1 -CU 1 of the fore wing about 0.7 times vein 2 -CU 1 (0.8 times), the hind tibia with dark brown subbasal patch (absent), the propodeum darkened (brownish yellow), the third tergite apically dark brown and anteriorly yellowish brown (laterally brownish yellow and medially dark brown) and T 1 posteriorly and T 2 medially distinctly brownish yellow pigmented (largely unpigmented). P. agarwali Varshney & Shujauddin, 1999 (a junior synonym of P. s y l ep t ae Zettel, 1990, syn. nov.) differs by having the third tergite medio-apically concave and lateral lamella somewhat protruding (truncate and lamella not protruding); vein 1 -CU 1 about 0.5 times as long as vein 2 -CU 1 (incorrectly depicted in original description of P. agarwali; 0.7 times in P. andamanensis); the pterostigma brown (dark brown) and the third tergite yellowish brown (median third dark brown and remainder yellowish brown). Type material. Holotype, female on card, INDIA, Andaman Islands, Jirkatong, 11.36620 N 92.850 E; 10.iii. 2012; hovering on inflorescence of Cassia sp., leg. Ankita Gupta. Paratypes, one female and two males on card, with same data as holotype. Deposited in the National Bureau of Agriculturally Important Insects (NBAII), Bangalore, India. Code NBAII /Brac/Phan/ 10312. Two males are deposited in Naturalis Biodiversity Center, Leiden, the Netherlands. PLATE I. Phanerotoma andamanensis sp. nov. (Holotype)—A. Female in habitus; B. Head in frontal view; C. Head with full sight on mandibles; D. Vertex; E. Mesosoma; F. Metasoma. PLATE II. Phanerotoma andamanensis sp. nov. (Paratype, female)—G. Profile view; H. Lateral view of head and mesopleuron; I. Fore wing. PLATE III. Phanerotoma andamanensis sp. nov. (Paratype, male)—J. Male in habitus; K. Mesosma; L. Vertex; M. Metasoma; N. Fore wing.Published as part of Gupta, Ankita & Achterberg, Cornelis Van, 2014, A new species of Phanerotoma Wesmael (Hymenoptera: Braconidae: Cheloninae) from the Andaman Islands, India, pp. 595-600 in Zootaxa 3856 (4) on pages 595-599, DOI: 10.11646/zootaxa.3856.4.8, http://zenodo.org/record/23149
New to the fauna of India ladybird beetles (Coleoptera: Coccinellidae)
No full textDas, P., Saha, G.K., Chandra, K., Gupta, D. (2022): New to the fauna of India ladybird beetles (Coleoptera: Coccinellidae). Far Eastern Entomologist 449: 9-17, DOI: 10.25221/fee.449.2, URL: http://dx.doi.org/10.25221/fee.449.
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Early Buddhist architecture of Bengal: morphological study on the vihāra of c. 3rd to 8th centuries
No full textThis dissertation examines the evolution of early Buddhist architectural forms of Bengal, specifically its vihāra and shrine structures. In general, this research explores Gupta and post-Gupta (c. third to eighth centuries AD) vihāra architecture of Bengal, where the primary focus is on the Buddhist shrine architecture constructed during this period. There is a preconception amongst historians that the period between the Gupta and the Pāla periods was characterized by disorder and chaos, commonly known as the period of Matsyanyayam. This is the reason why discussions on the architectural history of Bengal have generally commenced from the Pāla period (c. 750 AD onwards). Analyzing extant and new evidences this study argues that the Buddhist architecture of Bengal thrived during the intervening period, albeit under the patronage of local kings and rulers. In the field of art and sculpture it is accepted that Buddhist Pāla art was a continuation of previous Gupta art forms, where post-Gupta period acted as the transition or a bridge. Following this general pattern, as this thesis argues, the rectangular Gupta shrine plan takes a mature cruciform shape during the Pāla period through a complex morphological development. The nature of Buddhist shrine architecture in Bengal during the early Gupta, later Gupta, and post-Gupta periods is described in the light of analyzed archaeological findings and architectural trends
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