957 research outputs found
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)
Some existence and uniqueness results for a solution of a system of equations
No full text[EN] This paper presents some existence and uniqueness results for a solution of a system of equations. Our results extend and generalize the well-known and celebrated results of Boyd and Wong [Proc. Amer. Math. Soc. 20 (1969)], Matkowski [Dissertations Math.(Rozprawy Mat.) 127 (1975)], Proinov [Nonlinear Anal. 64 (2006)], Ri [Indag. Math. (N. S.) 27 (2016)] and many others. We also present some illustrative examples to validate our results.The first author acknowledges the support from the URC/FRC fellowship, University of Johannesburg, South Africa.Khantwal, D.; Pant, R. (2024). Some existence and uniqueness results for a solution of a system of equations. Applied General Topology. 25(1):159-174. https://doi.org/10.4995/agt.2024.19798OJS15917425
Broadband signal reconstruction for SHM: An experimental and numerical time reversal methodology
No full textStructural Health Monitoring (SHM) aims to shift aircraft maintenance from a time-based to a condition-based approach. Within all the SHM techniques, Acoustic Emission (AE) allows for the monitoring of large areas by analyzing Lamb waves propagating in plate like structures. In this study, the authors proposed a Time Reversal (TR) methodology with the aim of reconstructing an original and unaltered signal from an AE event. Although the TR method has been applied in Narrow-Band (NwB) signal reconstruction, it fails when a Broad-Band (BdB) signal, such as a real AE event, is present. Therefore, a novel methodology based on the use of a Frequencies Compensation Transfer Function (FCTF), which is capable of reconstructing both NwB and real BdB signals, is presented. The study was carried out experimentally using several sensor layouts and materials with two different AE sources: (i) a Numerically Built Broadband (NBB) signal, (ii) a Pencil Lead Break (PLB). The results were validated numerically using Abaqus/CAETM with the implementation of absorbing boundaries to minimize edge reflections.Structural Integrity & Composite
Lost in Transmission: Contextual Variation in Chimpanzee Pant Hoots and its Implications for Referential Communication presented at the Animal Behaviour Society 45th Annual Meeting in Snowbird Resort, UT, August 16-20, 2008
No full textI attended the 45th annual meeting of the Animal Behavior Society in Snowbird, Utah, from 16-20 August 2008. The meetings included 4 plenary speakers, a symposium on evolutionary polyphenisms, contributed talks and posters. As is typical of ABS meetings, presentations covered a broad range of research topics on a variety of taxa, but all presenters converged on themes that are topical and cutting edge in the field of animal behaviour. As a primatologist, I have found attending meetings with a broad taxonomic focus invaluable for gaining insights into comparative approaches to studying different domains of behaviour in primates.
My contributions consisted of a paper on my work in chimpanzee communication, of which I was first author and presenter, as well as a paper on structural-function relationships in baboon vocalizations, on which I was second author (the first author was presenter). Both papers were well received and they generated positive commentary from attendees, particularly those involved in the field of animal communication. I was encouraged to continue to apply my theoretical approach to the study of animal vocalizations.
At present, I am starting a new primate research program on New World monkeys in Belize, CA. In future meetings I hope to present data generated by this endeavour, as soon as they become available. International meetings such as those hosted by ABS offer excellent opportunities for Athabasca University to showcase the work of its faculty and to build the university’s reputation as a leader in innovative research.There have been several previous studies of the loud, long-distance calls of chimpanzees, termed ‘pant hoots’. Some have explored the possibility that there are acoustically distinct subtypes of pant hoots that communicate to distant listeners different information about the caller’s behaviour, or ecological and social circumstances. However, research aimed at assessing the degree to which pant hoots constitute ‘referential’ animal signals have thus far been either inconclusive or conflicting. To help resolve these issues, we undertook research on pant hoots produced by wild chimpanzees (Pan troglodytes schwienfurthii) living in the Budongo Forest, Uganda. In this paper, we report the results of acoustic analysis of 201 pant hoot series produced by seven adult males. Our results show that individual variation exceeds those differences observed between production contexts. In addition, what contextual variation we did observe occurred in acoustic features that are expected to vary with arousal and/or as by-products of physical activities associated with call production. We propose that pant hoots function primarily to transmit information about caller identity to dispersed group members, and that receivers might infer the situational context of the caller via associated auditory cues, such as caller location, direction of travel and social circumstance, that are independent of call structure.Academic & Professional Development Fund (A&PDF
Corporate Governance, Competition and Firm Performance: Evidence from India.
No full textThe aim of this paper is to show the interaction effect of product market competition and corporate governance variables on firm performance. While the linkage between internal governance mechanism and firm performance is well established in several studies, the interaction between internal and external governance mechanism has received scanty attention in emerging market economies. Here we have shown the independent and interaction effect of ownership and competition variable on firm productivity. Contrary to conventional wisdom, we document that competition has in reality become a discernible force in developing economies. The econometric modelling result shows while the standalone effect of ownership variable on productivity is mostly insignificant, there is a strong positive interaction effect with competition variables.
Membrane remodeling by novel regulators of the recycling endosome: the RME-1 and AMPH-1 partnership
No full textEndocytic recycling is the process where by molecules traffic from endosomes back to the plasma membrane. This process is crucial for the maintenance of cellular homeostasis and cell polarity. C. elegans RME-1 and its mammalian homolog mRme-1/EHD1 are required for exit of cargo from the recycling endosome. The mechanism by which they control cargo exit has led to a proposal that they may function in formation of carrier tubules that break off from the recycling endosome. Recent studies suggested parallels of EHD family to the Dynamin GTPase superfamily of mechanoenzymes which function in membrane fission at the clathrin coated pit. Through a bioinformatics based screen we identified an interaction between RME-1 and AMPH-1, the only C. elegans member of Amphiphysin/BIN1 family of BAR-domain proteins. In mammalian neuronal synapses, Amphiphysin family proteins regulate the recruitment and activity of Dynamin for formation of vesicles. We established that AMPH-1 co localizes with RME-1 on recycling endosomes in vivo, amph-1 deletion mutants are defective in recycling endosome morphology and function and that AMPH-1 and RME-1 cooperatively promote the recycling of transmembrane cargo. in vitro we found that purified recombinant AMPH-1/RME-1 co-assemble on membranes to produce short, coated tubules which are qualitatively distinct from those produced by either protein alone. We have established that AMPH-1 and RME-1 serve as a novel membrane tubulation and possibly fission machinery at the recycling endosome, an interaction that is conserved in mammals.
We also investigated the function of a serine/threonine kinase of the germinal center kinase family (GCK-2) which is known to bind two Rabs, RAB-10 and RAB-8, which function in endocytic recycling. We established that GCK-2 is a novel effector of RAB-8 in regulating RME-1 labeled recycling endosomes. In select functions, it may serve as a RAB-10 effector. This may be an example of RABs being sequentially activated by binding the same effector. This study identifies a novel function for a germinal center kinase proteins whose only known function relates to the MAPK signaling cascade.
We recently established an interaction between GCK-2 and AMPH-1. We hypothesize that this interaction could serve as a hub which ties together the major recycling endosome interactions mapped for RME-1/AMPH-1 as well as with RAB-8/RAB-10.Ph.D.Includes bibliographical references (p. 292-304)by Saumya Pan
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