Anantharaman, M R; Vinayasree, S; Soloman, M A; Vijutha, Sunny; Mohanan, P; Philip, Kurian(Elsevier, April 21, 2013)
[+]
[-]
Abstract:
Flexible and thin single layer microwave absorbers based on strontium ferrite–carbon black–nitrile rubber
composites have been fabricated employing a specific recipe and their reflection loss characteristics
were studied in the S (2–4 GHz) and X-bands (8–12 GHz). The incorporation of carbon black not only
reinforces the rubber by improving the mechanical properties of the composite but also modifies the
dielectric permittivity of the composite. Strontium ferrite when impregnated into a rubber matrix
imparts the required magnetic permeability to the composite. The combination of strontium ferrite
and carbon black can then be employed to tune the microwave absorption characteristics of the resulting
composite. The complex dielectric permittivity and permeability were measured by employing a cavity
perturbation technique. The microwave absorption characteristics of composites were modelled in that
an electromagnetic wave incident normally on the metal terminated single layer absorber. The influence
of filler volume fraction, frequency, absorber thickness on the bandwidth of absorption are discussed and
correlated
Gopalakrishnan Nayar, K; Dr.Parameswaran, Nair N(Cochin University Of Science And Technology, January 3, 1987)
[+]
[-]
Abstract:
The main objective of the study has been to
analyse the marketing problems of Indian cardamom at home
and abroad and examine possible courses of action which
would lead to increased consumption of cardamom, both
within India and abroad. This has been done in the context
of the anticipated increases in the Indian and world
supply of cardamom. Field studies were undertaken to understand
the cost of production of cardamom and cost of export.
This study was also directed at examining how
far price fluctuations in cardamom can be controlled in
the Indian context, so as to have a reasonable and stable
income for primary producers which will ensure adequate
encouragement for higher production and better export
earnings.
Description:
School of Management Studies, Cochin University
of Science and Technology