The design and development of an L-band printed dipole antenna.
optimized for wide-band applications near first resonance, is reported.
This design has achieved more than 48% impedance bandwidth
(VSWR 2:1), without degrading its overall radiation efficiency
Sarin, V P; Nisha, Nassar; Deepu, V; Aanandan,C K; Mohanan, P; Vasudevan, K(Antennas and Wireless Propagation Letters, IEEE, 2009)
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Abstract:
A simple electromagnetically coupled wideband printed microstrip antenna having a 2:1 VSWR bandwidth of 38% covering the 5.2/5.8-GHz WLAN, HIPERLAN2, and HiSWANa communication bands is presented. The large bandwidth is obtained by adding a rectangular metal strip on a slotted square microstrip antenna. The antenna occupies an overall dimension of 42 times 55 times 3.2 mm3 when printed on a substrate of dielectric constant 4. It exhibits good radiation characteristics and moderate gain in the entire operating band. Details of the design along with experimental and simulation results are presented and discussed.
Suma,M N; Bybi, P C; Mohanan, P(Wiely, May , 2006)
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Abstract:
A planar monopole antenna suitable for broadband wireless communication is designed and developed. With the use of a truncated ground plane, the proposed printed monopole antenna offers nearly 60% 2:1 VSWR bandwidth and good radiation characteristics for the frequencies across the operating band. A parametric study of the antenna is performed based on the optimized design, and a prototype of the antenna suitable for 2.4-GHz WLAN application is presented. The antenna can be easily integrated into wireless circuitry and is convenient for application in laptop computers.
Lethakumary,B; Sreedevi, Menon K; Aanandan,C K; Mohanan, P(Microwave and Optical Technology Letters, April 5, 2003)
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Abstract:
An electromagnetically coupled T-shaped microstrip feed
used to enhance the impedance bandwidth of a rectangular microstrip
antenna is reported. The proposed antenna offers a 2:1 VSWR bandwidth
of -36% with an increase in gain of 0.8 dB
Sreedevi, Menon K; Lethakumary,B; Vasudevan, K(Microwave and Optical Technology Letters, November 5, 2002)
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Abstract:
Bandwidth enhancement of a rectangular microstrip
antenna using a T-shaped microstrip feed is explored in this paper.
A 2:1 VSWR impedance bandwidth of 23% is achieved by employing
this technique. The far-field patterns are stable across the pass band.
The proposed antenna can be used conveniently in broadband communications
Mathew, K T; Stephen,D S; Aanandan,C K; Mohanan, P; K G Nair(Department of Electronics, May 12, 1994)
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Abstract:
A trapezoidal strip grating surface that eliminates specular
reflections almost over the entire X -band frequency range for TM
polarization is reported This new grating structure overcomes the
bandwidth limitation of conventional rectangular strip grating surfaces
Poulose Jacob,K; Santhosh, Simon(International Journal of Modern Engineering Research, 2012)
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Abstract:
The evolution of wireless sensor network technology has enabled us to develop advanced systems for real time monitoring. In the present scenario wireless sensor networks are increasingly being used for precision agriculture. The advantages of using wireless sensor networks in agriculture are distributed data collection and monitoring, monitor and control of climate, irrigation and nutrient supply. Hence decreasing the cost of production and increasing the efficiency of production.This paper describes the application of wireless sensor network for crop monitoring in the paddy fields of kuttand, a region of Kerala, the southern state of India.
Description:
International Journal of Modern Engineering Research (IJMER)
www.ijmer.com Vol.2, Issue.4, July-Aug 2012 pp-2017-2020
Smijin, Soman K; Dr. Paulose, C S(Cochin University of Science and Technology, July 2, 2012)
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Abstract:
The onset of spontaneous seizures triggers a cascade of molecular and cellular events that eventually leads to neuronal injury and cognitive decline. The present study investigated the effect of Withania somnifera (WS) root extract and Withanolide A (WA) in restoring behavioural deficit by inhibiting oxidative stress induced alteration in glutamergic neurotransmission. The subdued performance in
behavioural tests shows impaired motor coordination and memory. Histopathological investigations revealed significant neuronal loss in hippocampus of epileptic rats indicating glutamate mediated excitotoxicity. The treatment with WS and WA restored behavioural deficit and ameliorated neuronal loss. An altered redox homeostasis leading to oxidative stress is a hallmark of TLE. The antioxidant potential was afflicted in epileptic rats, evident from altered activity of SOD and CAT, down regulation of SOD and GPX expression and enhanced lipid peroxidation. The antioxidant property of WS and WA restored altered antioxidant capacity. Alteration in GDH activity and down regulation of GLAST expression resulted in enhanced glutamate content in the brain regions. The metabolism of glutamate was altered in the form of down regulated GAD expression. The alteration in synthesis, transport and metabolism resulted in further increase of the glutamate concentration at the synapse leading to glutamate mediated excitotoxicity. The decreased NMDA and AMPA receptor binding and down
regulated NMDA R1, NMDA 2B and AMPA (GluR2) mRNA expression indicated altered glutamergic receptor function. The treatment with WS and WA reversed altered glutamergic receptor function, synthesis, transport and metabolism. The enhanced levels of second messenger IP3 responsible for Ca2+ mediated toxicity was reversed after treatment with WS and WA. Neurotoxics concentration of glutamate resulted in up regulation of pro apoptotic factors Bax and Caspase 8 and down regulation of anti apoptotic factor Akt resulting in neuronal death. The treatment with WS and WA resulted in activation of Akt and down regulation of Bax and caspase 8 leading to blocking of apoptotic pathway.
The treatment with WS and WA resulted in reduced seizure frequency and amelioration of associated alterations suggesting the therapeutic role of Withania somnifera in temporal lobe epilepsy
Description:
Department of Biotechnology, Cochin University of Science and Technology
Celine, Scaria K; Dr.George, C M(Cochin University of Science And Technology, July , 1985)
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Abstract:
The corporate views on wives roles and their subsequent involvement in their husbands career seem to be quiet surprising .Even though the corporate magnates are aware of wives influence on husbands professional advancements they seldom give credit to this factor. Again it may be an eye opener for the corporations which hardly take note of the executives wives their likes or dislikes, their expectations or frustrations. They are to understand that man in his totality and decisions affecting his family have to be taken seriously. More over they should respect the right of the wives by understanding the exact role played by them. Thus this study is to understand the roles and contributions of executives wives to the success of their husbands in their professions. The study tries to minimize the gap between the corporations and the wives ,and also to make the wives aware of their peculiar role in the career advancement of their executive husbands.
Description:
School of management studies, Cochin University of Science And Technology
Kochuthressia, M M; Dr.Payyapilly, J T(Cochin University of Science And Technology, October , 1994)
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Abstract:
even after 45 years of independence, it is seen that
women are still left cum the periphery cnf the political process.
Effective and meaningful participation of women in politics
remains elusive for most of them. The representation of women in the state legislatures and in both Houses of Parliament has
been very marginal. The percentage of women members in the LokSabha to the total membership of the body has never touched a two-digit figure so far. Within these 45 years, India could field only five women as Union Cabinet Ministers. In the case of the various states also, the position of women's participation in political activities is not very different. On the whole, it is seen that in independent India the role played by women in the electoral politics of the country or in the day to day activities of the different political parties is very" ineffective and insignificant.
The present study was undertaken to make an assessment of
women's involvement in the political process of Kerala since independence. This small state in the southernmost part of India claims ‘that it possesses certain. unique features in its social fabric that makes it different from the rest of the country as far as the place of women in society is concerned.
Description:
School of management studies, Cochin University of Science And Technology
Anna,V; Dr.Chandrasekharan Pillai, N(Cochin University of Science and Technology, January , 1989)
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Abstract:
This study was on women's industries programme in Kerala, to assess the involvement of manpower in this field and to analyse the difficulties and problems faced by the women entrepreneurs which impede the growth and smooth functioning of units. It was supported by the views of 275 women entrepreneurs of Kerala. Census method was adopted and only 58 per cent of units responded by supplying necessary details. Details were collected from these: units through mailed questionnaires designed for the purpose. The study highlights the profile of workers in the women's industrial units, but the profile of the entrepreneurs is neglected. Problems faced by women entrepreneurs are analysed under the following major heads viz., capital, raw materials, marketing, competition from other units and availability of power. But the conclusions drawn from the survey are not on proper empirical support. It also includes suggestions of entrepreneurs. The major findings of the study are as follows : Nearly 82 per cent of the women's industrial units are functioning throughout the year. Proprietory concerns and co—operative societies are the popular ones. Majority of the units are running on profit. Women's units are still in their infancy and so the problems faced by them are many. The characteristics of having other business or sister concerns is lacking among women entrepreneurs. Nearly 94 per cent of the employees are permanent. About four-fifth (81%) of the workers are full time employees. Only a very small proportion of the employees (1%) get a reasonable income that is above Rs.50O per month. The workers are very young and 63 per cent
workers have no experience at all.
Description:
Department of Applied Economics,
Cochin University of Science and Technology
Padmini,C; Sukumaran Nair,M K(Department of Applied Economics, 2003)
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Abstract:
In the present study made an attempt to analyse the structure, performance and growth of women industrial cooperatives in kannur district, Kerala. The study encompasses all women industrial cooperatives registered at the district industries center, kannur and that currently exist. The women industrial cooperatives are classified into two ie; group with network and another group without network. In Kannur there are 54 units working as women industrial cooperatives. One of the main problems the women cooperatives face is the lack of working capital followed marketing problem. The competition between cooperatives and private traders is very high. The variables examined to analyse the performance of women industrial cooperatives in Kannur showed that there exists inter unit differences in almost all the variables. The financial structure structure shows that the short term liquidity of women cooperatives in Kannur favour more the units which have political networks; but the long term financial coverage is seen to be highly geared in this group, not because of a decline is net worth but due to highly proportionate increase in financial liabilities in the form of borrowings. The encouragement given by the government through financial stake and other incentives has been the major factor in the formation and growth of women cooperatives. As a result both productivity and efficiency improves in the cooperatives. In short the present study helped to capture the impact, role and dynamics of networking in general and socio political network in particular in relation to intra and inter unit differences on the structure, growth and performance of women industrial cooperatives societies in Kannur district