Nify, Benny; Dr.Sujatha, C H(Cochin University of Science and Technology, June , 2009)
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Abstract:
The thesis deals with a benchmark study of dissolved and sedimentary sulphur
compounds which play prominent roles in the prevailing redox conditions in the
selected sites of Cochin estuarine system. Sulphur and its analogues play prominent
roles in estuarine biochemical processes. A complete knowledge on the sulphur
involvement in these processes is restricted due to the lacking of data on the organic
sulphur compounds. Sulphate and sulphide in surface and bottom water and
Sulphate, acid volatile sulphide and total sulphur in sediments were studied and
correlated to know their interrelations in determining the redox condition of the
environment. It also characterises the sediments of the sites on the basis of total
organic carbon: total sulphur ratio. The study had attempted to decrease the
concentration levels of sulphur in the sedimentary environment by the application of
a remedial measure. Knowledge of sulphur uptake by plants from prior literatures
has prompted to use phytoremediation for decreasing the sulphur concentration.
Phytoremediation is an emerging technology that uses plants to clean up or remediate
contaminated soil, sludges, sediments, and ground water through contaminant
removal, degradation or containment. The plant selected was wheat grass since
earlier studies have shown that wheat grass is effective in remediating pollutants
particularly trace metals. So reduction in the concentration of selected trace metals
was also focussed.
Description:
Department of Chemical Oceanography, Cochin University of Science and Technology
Louis, Godfrey; Santhosh Kumar, A(Society of Photo-Optical Instrumentation Engineers, 2008)
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Abstract:
The red cells found in the red rain in Kerala, India are now considered as a possible case of extraterrestrial life form.
These cells can undergo rapid replication even at an extreme high temperature of 300 deg C. They can also be cultured in
diverse unconventional chemical substrates. The molecular composition of these cells is yet to be identified. This paper
reports the unusual autofluorescence characteristic of the cultured red rain cells. A spectrofluorimetric study has been
performed to investigate this, which shows a systematic shift of the fluorescence emission peak wavelength as the
excitation wavelength is increased. Conventional biomolecules are not known to have this property. Details of this
investigation and the results are discussed.
Anantharaman, M R; Al-Harthi, S H; Mohammed, Elzain; Muataz, Al-Barwani; Amal, Kora'a; Thomas, Hysen; Myo, Tay Zar Myint(Springer, 2012)
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Abstract:
Roughness and defects induced on few-layer graphene (FLG) irradiated by Ar+ ions at different energies were
investigated using X-ray photoemission spectroscopy (XPS) and atomic force microscopy techniques. The results
provide direct experimental evidence of ripple formation, sp2 to sp3 hybridized carbon transformation, electronic
damage, Ar+ implantation, unusual defects and edge reconstructions in FLG, which depend on the irradiation
energy. In addition, shadowing effects similar to those found in oblique-angle growth of thin films were seen.
Reliable quantification of the transition from the sp2-bonding to sp3-hybridized state as a result of Ar+ ion irradiation
is achieved from the deconvolution of the XPS C (1s) peak. Although the ion irradiation effect is demonstrated
through the shape of the derivative of the Auger transition C KVV spectra, we show that the D parameter values
obtained from these spectra which are normally used in the literature fail to account for the sp2 to sp3 hybridization
transition. In contrast to what is known, it is revealed that using ion irradiation at large FLG sample tilt angles can
lead to edge reconstructions. Furthermore, FLG irradiation by low energy of 0.25 keV can be a plausible way of
peeling graphene layers without the need of Joule heating reported previously
Description:
Al-Harthi et al. Nanoscale Research Letters 2012, 7:466
Radhakrishnan, N; Dr.Meera Bai,M(Cochin University of Science and Technology, November 20, 2003)
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Abstract:
Studies in urban water supply system are few in the state of Kerala.
It is a little researched area. In the case of water pricing a number of studies are
available. In Kerala state, exception to Jacob John’s study on “Economics of
Public Water Supply System”, which is a case study of Trivandrum Water Supply
System in 1997, no exhaustive research work has so far come out in this field.
loreover no indepth research study has come up, so far, relating to household
ater demand analysis and the distribution system of urban piped water supply.
he proposed study is first of its kind, which focuses on the distributional and
Iailability problems of piped water supply in an urban centre in Kerala state.
Hence there is a felt need for enquiring into the sufficiency of
)table water supplied to people in urban areas and the efficiency maintained in
roviding the scarce resource and preventing its misuse by the consumers. It is in
llS backdrop that this study was undertaken and its empirical part was conducted
|Calicut city in the state of Kerala. Study is confined to the water supply system
ithe city of Calicut
Description:
Department of Applied Economics,
Cochin University of Science and Technology
Rani, Joseph(OPA (Overseas Publishers Association), May 28, 1995)
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Abstract:
Amine Terminated Liquid Natural Rubber (ATNR) was used as a plasticiser in filled NR and NBR
compounds replacing oil/DOP. The scorch time and cure time were found to be lowered when ATNR
was used as the plasticiser. ATNR was found to improve the mechanical properties like tensile strength,
tear strength and modulus of the vulcanizates . The ageing resistance of the vulcanizates containing ATNR
was superior compared to the vulcanizates containing oil/DOP.
Girijavallabhan, C P; Radhakrishnan, P; Nampoori, V P N; Nibu, A George; George, A K(Applied Physics B Lasers and Optics, July 18, 2001)
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Abstract:
In this paper, we describe the use of an open cell
photoacoustic configuration for the evaluation of the thermal
effusivity of liquid crystals. The feasibility, precision and reliability
of the method are initially established by measuring
the thermal effusivities of water and glycerol, for which the
effusivity values are known accurately. In order to demonstrate
the use of the present method in the thermal characterization
of liquid crystals, we have measured the thermal
effusivity values in various mesophases of 4-cyano-4 -
octyloxybiphenyl (8OCB) and 4-cyano-4 -heptyloxybiphenyl
(7OCB) liquid crystals using a variable temperature open
photoacoustic cell. A comparison of the measured values for
the two liquid crystals shows that the thermal effusivities of
7OCB in the nematic and isotropic phases are slightly less
than those of 8OCB in the corresponding phases
Radhakrishnan, P; Nampoori, V P N; Girijavallabhan, C P; Nibu, A George; George, A K(Applied Physics B Lasers and Optics, July 18, 2001)
[+]
[-]
Abstract:
In this paper, we describe the use of an open cell
photoacoustic configuration for the evaluation of the thermal
effusivity of liquid crystals. The feasibility, precision and reliability
of the method are initially established by measuring
the thermal effusivities of water and glycerol, for which the
effusivity values are known accurately. In order to demonstrate
the use of the present method in the thermal characterization
of liquid crystals, we have measured the thermal
effusivity values in various mesophases of 4-cyano-4 -
octyloxybiphenyl (8OCB) and 4-cyano-4 -heptyloxybiphenyl
(7OCB) liquid crystals using a variable temperature open
photoacoustic cell. A comparison of the measured values for
the two liquid crystals shows that the thermal effusivities of
7OCB in the nematic and isotropic phases are slightly less
than those of 8OCB in the corresponding phases
V P N Nampoori; Radhakrishnan, P; Girijavallabhan, C P; Nibu, A George; George, A K(Applied Physics B Lasers and Optics, June 18, 2001)
[+]
[-]
Abstract:
In this paper, we describe the use of an open cell
photoacoustic configuration for the evaluation of the thermal
effusivity of liquid crystals. The feasibility, precision and reliability
of the method are initially established by measuring
the thermal effusivities of water and glycerol, for which the
effusivity values are known accurately. In order to demonstrate
the use of the present method in the thermal characterization
of liquid crystals, we have measured the thermal
effusivity values in various mesophases of 4-cyano-4 -
octyloxybiphenyl (8OCB) and 4-cyano-4 -heptyloxybiphenyl
(7OCB) liquid crystals using a variable temperature open
photoacoustic cell. A comparison of the measured values for
the two liquid crystals shows that the thermal effusivities of
7OCB in the nematic and isotropic phases are slightly less
than those of 8OCB in the corresponding phases
Carboxy Terminated Liquid Natural Rubber (CTNR) was
prepared by photochemical reaction using maleic anhydride and masticated
natural rubber (NR). The use of CTNR as an adhesive in bonding rubber to
rubber and rubber to metal was studied. The peel strengths and lap shear
strengths of the adherends which were bonded using CTNR were determined.
The effect of using a tri isocyanate with CTNR in rubber to metal bonding was
also studied. It is found that CTNR can effectively be used in bonding rubber to
rubber and rubber to mild steel.
This paper studies the use of E•rescurces by the faculty and research
scholars of Cochin University of Science and TechnologytI'he: use of E resources
under INDEST.consortinm;_UGC.lnfonet :project,.and the
databases.subscribed.to.in theCUSAT Library are.studied.in the.survey,
The:survey•covers various aspects jike.awareness-of the .users, user
satisfaction, use pattem of Eoresources,preferenee.for print or electronic
version.etc. The problems-faced-are stressed :and possible solutions are
suggested
Bright Singh, I S; Rosamma, Philip(Central ^Aarine Fisheries Research Institute, November , 2002)
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Description:
Winter School on
'RECENT ADVANCES IN
DIAGNOSIS AND
MANAGEMENT OF DISEASES
IN MARICULTURE'
7-27 November, 2002
Course Manual Indian Council of Agricultural Research
Central ^Aarine Fisheries Research Institute
Nampoori, V P N; Vallabhan, C P G; George, A K; Radhakrishnan, P; Rajasree, K; Vidyalal, V(Elsevier, July , 1998)
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[-]
Abstract:
he phenomenon of single beam mirage effect, otherwise known as photothermal deflection (PTD) effect using a He–Ne laser beam has been employed to detect phase transitions in some liquid crystals. It has been observed that anomalous changes in amplitude occur in the PTD signal level near the transition temperature. The experimental details and the results of measurements made in liquid crystals E8, M21 and M24 are given in this paper.
Rajasree, K; Vidyalal, V; Radhakrishnan, P; Nampoori, V P N; Vallabhan, C P G(IOP, 1993)
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[-]
Abstract:
The phenomenon of mirage effect suffered by a He-Ne laser beam has been utilized to detect phase transitions in solids. It has been observed that anomalous fluctuations of large amplitude occur in the signal level near the transition temperature. The mean square value of the fluctuation is found to exhibit a well-defined peak at this point. Results of measurements made in the case of crystals of TGS ((NH2CH2COOH)3.H2SO4) and a ceramic sample (BaTiO3) are given to illustrate this technique.
Sheena, Mathew; Poulose Jacob,K(International Journal of Computer and Information Engineering, 2008)
[+]
[-]
Abstract:
Extensive use of the Internet coupled with the
marvelous growth in e-commerce and m-commerce has created a
huge demand for information security. The Secure Socket Layer
(SSL) protocol is the most widely used security protocol in the
Internet which meets this demand. It provides protection against
eaves droppings, tampering and forgery. The cryptographic
algorithms RC4 and HMAC have been in use for achieving security
services like confidentiality and authentication in the SSL. But recent
attacks against RC4 and HMAC have raised questions in the
confidence on these algorithms. Hence two novel cryptographic
algorithms MAJE4 and MACJER-320 have been proposed as
substitutes for them. The focus of this work is to demonstrate the
performance of these new algorithms and suggest them as dependable
alternatives to satisfy the need of security services in SSL. The
performance evaluation has been done by using practical
implementation method.
Poulose Jacob,K; Sheena, Mathew(International Journal of Computer, Information & Systems Science & Engineering, September 1, 2008)
[+]
[-]
Abstract:
Extensive use of the Internet coupled with the
marvelous growth in e-commerce and m-commerce has created a
huge demand for information security. The Secure Socket Layer
(SSL) protocol is the most widely used security protocol in the
Internet which meets this demand. It provides protection against
eaves droppings, tampering and forgery. The cryptographic
algorithms RC4 and HMAC have been in use for achieving security
services like confidentiality and authentication in the SSL. But recent
attacks against RC4 and HMAC have raised questions in the
confidence on these algorithms. Hence two novel cryptographic
algorithms MAJE4 and MACJER-320 have been proposed as
substitutes for them. The focus of this work is to demonstrate the
performance of these new algorithms and suggest them as dependable
alternatives to satisfy the need of security services in SSL. The
performance evaluation has been done by using practical
implementation method.
Description:
World Academy of Science, Engineering and Technology
Vol:2 2008-03-28