1,996 research outputs found
New Dimensions of Management Education: Issues & Imperatives
Management education has gained importance due to the emergence of professionalism in the corporate sector. In the meantime, the competitive business environment has paved the way for increased demand for management graduates in the employment market. This has led to a significant expansion of management education across the world. Today, business schools have the challenging task of developing the competency level of students to meet corporate expectations. Given the developments in today’s business environment, preparing our students for their future will require significant change in the curriculum and pedagogy. In this background, this paper attempts to explore a mechanism to stimulate development of new curricular elements and methods in management education. It also describes the emerging strategy to make teaching methodology in management education more vibrant and in sync with the changes in the business and economic environment
A detailed analysis of structure growth in theories of gravity
We investigate the connection between dark energy and fourth order gravity by
analyzing the behavior of scalar perturbations around a
Friedmann-Robertson-Walker background. The evolution equations for scalar
perturbation are derived using the covariant and gauge invariant approach and
applied to two widely studied gravity models. The structure of the
general fourth order perturbation equations and the analysis of scalar
perturbations lead to the discovery of a characteristic signature of fourth
order gravity in the matter power spectrum, the details of which have not seen
before in other works in this area. This could provide a crucial test for
fourth order gravity on cosmological scales.Comment: 27 pages and 35 figure
The cosmological gravitational wave background from primordial density perturbations
We discuss the gravitational wave background generated by primordial density
perturbations evolving during the radiation era. At second-order in a
perturbative expansion, density fluctuations produce gravitational waves. We
calculate the power spectra of gravitational waves from this mechanism, and
show that, in principle, future gravitational wave detectors could be used to
constrain the primordial power spectrum on scales vastly different from those
currently being probed by large-scale structure. As examples we compute the
gravitational wave background generated by both a power-law spectrum on all
scales, and a delta-function power spectrum on a single scale.Comment: 8 Page
Magnetic and transport properties of Pr2Pt3Si5
We have investigated the magnetic and transport properties of a
polycrystalline Pr2Pt3Si5 sample through the dc and ac magnetic
susceptibilities, electrical resistivity, and specific heat measurements. The
Rietveld refinement of the powder X-ray diffraction data reveals that Pr2Pt3Si5
crystallizes in the U2Co3Si5-type orthorhombic structure (space group Ibam).
Both the dc and ac magnetic susceptibility data measured at low fields exhibit
sharp anomaly near 15 K. In contrast, the specific heat data exhibit only a
broad anomaly implying no long range magnetic order down to 2 K. The broad
Schottky-type anomaly in low temperature specific heat data is interpreted in
terms of crystal electric field (CEF) effect, and a CEF-split singlet ground
state is inferred. The absence of the long range order is attributed to the
presence of nonmagnetic singlet ground state of the Pr3+ ion. The electrical
resistivity data exhibit metallic behavior and are well described by the
Bloch-Gr\"uniesen-Mott relation.Comment: 6 pages, 8 figure
Secure Message Dissemination with QoS Guaranteed Routing in Internet of Vehicles
Internet of Vehicles (IoV) is a variant of vehicular adhoc network (VANET) where vehicles can communicate with other vehicles, infrastructure devices, parking lots and even pedestrians. Communication to other entities is facilitates through various services like DSRC, C2C-CC. Fake messages can be propagated by attackers for various selfish needs. Complex authentication procedures can affect the propagation of emergency messages. Thus a light weight mechanism to ensure the trust of messages without affecting the delivery deadlines for emergency messages. Addressing this problem, this work proposes a clustering based network topology for IoV where routing is optimized for message dissemination of various classes using hybrid meta-heuristics. In addition, two stage message authentication technique combining collaborative authentication with Bayesian filtering is proposed to verify the authenticity of message. Through simulation analysis, the proposed solution is found to detect fake messages with an accuracy of 96% with 10% lower processing delay compared to existing works
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