Pedicle screw insertion technique has made revolution in the surgical treatment of spinal fractures and spinal disorders. Although X- ray fluoroscopy based navigation is popular, there is risk of prolonged exposure to X- ray radiation. Systems that have lower radiation risk are generally quite expensive. The position and orientation of the drill is clinically very important in pedicle screw fixation. In this paper, the position and orientation of the marker on the drill is determined using pattern recognition based methods, using geometric features, obtained from the input video sequence taken from CCD camera. A search is then performed on the video frames after preprocessing, to obtain the exact position and orientation of the drill. An animated graphics, showing the instantaneous position and orientation of the drill is then overlaid on the processed video for real time drill control and navigation
Poulose Jacob,K; Preetha Theresa, Joy(IEEE, February 16, 2014)
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Abstract:
Cache look up is an integral part of cooperative
caching in ad hoc networks. In this paper, we discuss a
cooperative caching architecture with a distributed cache look up
protocol which relies on a virtual backbone for locating and
accessing data within a cooperate cache. Our proposal consists of
two phases: (i) formation of a virtual backbone and (ii) the cache
look up phase. The nodes in a Connected Dominating Set (CDS)
form the virtual backbone. The cache look up protocol makes use
of the nodes in the virtual backbone for effective data
dissemination and discovery. The idea in this scheme is to reduce
the number of nodes involved in cache look up process, by
constructing a CDS that contains a small number of nodes, still
having full coverage of the network. We evaluated the effect of
various parameter settings on the performance metrics such as
message overhead, cache hit ratio and average query delay.
Compared to the previous schemes the proposed scheme not only
reduces message overhead, but also improves the cache hit ratio
and reduces the average delay
Description:
Advanced Communication Technology (ICACT), 2014 16th International Conference on
Bright Singh, I S; Rosamma, Philip; Sreedharan, K(SBM, January 16, 2012)
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Abstract:
Aeromonas spp. are ubiquitous aquatic organisms, associated with multitude of diseases in several species of
animals, including fishes and humans. In the present study, water samples from two ornamental fish culture
systems were analyzed for the presence of Aeromonas. Nutrient agar was used for Aeromonas isolation, and
colonies (60 No) were identified through biochemical characterization. Seven clusters could be generated
based on phenotypic characters, analyzed by the programme NTSYSpc, Version 2.02i, and identified as:
Aeromonas caviae (33.3%), A. jandaei (38.3%) and A. veronii biovar sobria (28.3%). The strains isolated
produced highly active hydrolytic enzymes, haemolytic activity and slime formation in varying proportions.
The isolates were also tested for the enterotoxin genes (act, alt and ast), haemolytic toxins (hlyA and aerA),
involved in type 3 secretion system (TTSS: ascV, aexT, aopP, aopO, ascF–ascG, and aopH), and
glycerophospholipid-cholesterol acyltransferase (gcat). All isolates were found to be associated with at least
one virulent gene. Moreover, they were resistant to frequently used antibiotics for human infections. The
study demonstrates the pathogenic potential of Aeromonas, associated with ornamental fish culture systems
suggesting the emerging threat to public health
Nampoori, V P N; Litty, Irimpan; Radhakrishnan, P(Journal of Applied Physics, American Institute of Physics,, 2008)
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Abstract:
We describe the structure of luminescence spectrum in the visible region in nano-ZnO in colloidal
and thin film forms under weak confinement regime by modeling the transition from excited state
energy levels of excitons to their ground state. Measurements on nanocrystallites indicate the
presence of luminescence due to excitonic emissions when excited with 255 nm. The relevant
energy levels showing the transitions corresponding to the observed peaks in the emission spectrum
of ZnO of particle size 18 nm are identified.
Anil Kumar, R; Dr.George, Varghese K(Cochin University Of Science And Technology, November , 2012)
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Abstract:
This study analyses the socio-economic backgrounds and entrepreneurial
profiles of the students and pass outs of the Vocational Higher Secondary
Education in Kerala and the academic achievements of the Vocational Higher
Secondary students and pass outs in Kerala in terms of their performance in the
examinations. The study also analyses the quality and availability of the various
training and support facilities of the Vocational Higher Secondary Schools in
Kerala, nature and rate of employment and higher studies among the pass outs
of the Vocational Higher Secondary Education in Kerala and the awareness of
students, pass outs, teachers and principals regarding the goals and objectives,
mode of implementation, apprenticeship training and higher study and
employment opportunities of the programme of the Vocational Higher
Secondary Education in Kerala.
Description:
School of Management Studies,
Cochin University of Science and Technology
Laina, A L; Dr.Girish Kumar, K(Cochin University Of Science And Technology, April , 2013)
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Abstract:
Electrochemical sensors are increasingly being investigated to perform
measurements for single or multiple analytes. Demanded by modern medical
diagnosis, advances in microfabrication technology have led to the development
of fast, sensitive and selective electrochemical sensors for drug analysis.
Electrochemical sensors for the measurement of analytes of interest in clinical
chemistry are ideally suited for these applications, due to their high sensitivity
and selectivity, simple-to-operate, rapid response time and low-cost.
As part of the present investigations eight voltammetric sensors have been
fabricated for six drugs such as PAM Chloride, Tamsulosin Hydrochloride,
Hesperidin Methyl Chalcone, Guaiphenesin, Cephalexin and Amoxicillin
trihydrate. The modification techniques adopted as part of the present work
include multiwalled carbon nanotube (MWNT) based modifications,
electropolymerization, gold nanoparticle (AuNP) based modifications and
platinum nanoparticle (PtNP) based modifications.
The thesis is divided into nine chapters
Description:
Department of Applied Chemistry
Cochin University of Science and Technology
Rajan, Varghese K E; Dr.Chandrasekharan, N S(Cochin University of Science And Technology, November , 1985)
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Abstract:
India is on the threshold of industrial and economic
development. The growth would be retarded if harmonious
employer-employee relations are not maintained. 'Wages'
plays a fundamental role in establishing this relationship.
However, much controversy in the industrial sphere revolves
round the question of wages. Though formerly the laissez
faire doctrine prevailed, with the emergence of the welfare
state ideology, notions of national economy and social
justice gained prominence. The problem of wages has became
one with social, political, economic, psychological and
legal dimensions.
Formulation of a proper wage policy is thus a riddle.
Realities of the present have to be fused with perspectives
about the future. With due recognition of all significant
factors, a proper balance has to be struck, which should
be the hard core of any wage policy. This study emphasises
the need for a wage policy which may meet the requirements
of rapid economic growth and stable industrial relations.
The study also indicates the proper bases for the promotien
of such a policy.
Description:
School of Legal Studies, Cochin University of Science And Technology
The present study investigates the benefits of
stabilizing the stone mastic asphalt (SMA) mixture in
flexible pavement with shredded waste plastic.
Conventional (without plastic) and the stabilized SMA
mixtures were subjected to performance tests including
Marshall Stability, tensile strength and compressive
strength tests. Triaxial tests were also conducted with
varying percentage bitumen by weight of mineral
aggregate (6% to 8%) and by varying percentage plastic
by weight of mix (6% to 12% with an increment of 1%).
Plastic content of 10% by weight of bitumen is
recommended for the improvement of the performance
of Stone Mastic Asphalt mixtures. 10% plastic content
gives an increase in the stability, split tensile strength
and compressive strength of about 64%, 18% and 75%
respectively compared to the conventional SMA mix.
Triaxial test results show a 44% increase in cohesion
and 3% decrease in angle of shearing resistance
showing an increase in the shear strength. The drain
down value decreases with an increase in plastic content
and the value is only 0.09 % at 10% plastic content and
proves to be an effective stabilizing additive in SMA
mixtures
Description:
International Journal of Engineering and Technology Vol.2 (6), 2010, 379-387
Ushakumary, E R; Dr.Madhu, G(Cochin University Of Science And Technology, April , 2013)
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Abstract:
Heavy metals are major toxic pollutants with severe health effects on
humans. They are released into the environment from a variety of industrial
activities. Cadmium, lead, zinc, chromium and copper are the most toxic
metals of widespread use in industries such as tanning, electroplating,
electronic equipment manufacturing and chemical processing plants. Heavy
metals contribute to a variety of adverse health environmental effects due to
their acute and chronic exposure through air, water and food chain.
Conventional treatment methods of metal removal are often limited by their
cost and ineffectiveness at low concentrations. Adsorption, the use of
inactivated biomass as adsorbents offers an attractive potential alternative to
their conventional methods. Mango peel and Alisma plantago aquatica are
naturally occurring and abundant biomass can offer an economical solution for
metal removal.The Cd(II), Pb(II), Zn(II), Cr(III) and Cu(II) adsorption by milled
adsorbents of mango peel and Alisma plantago aquatica were evaluated in
batches.
Description:
School of
Engineering, Cochin University of Science and Technology
Madhusoodanan,P; Dr.Sharma,G S(Cochin University of Science and Technology, October , 1985)
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Abstract:
At intermediate depths of the Arabian Sea, the circulation and characteristics of water are more
influenced by the high saline waters from the north and low saline waters from the south of equator. The interaction of these waters which greatly differ in characteristics is less understood compared to that at the upper layers. An understanding of the nature of the intermediate waters is of vital importance not only because of the unusual characteristics of the waters but also due to the influx of the different water masses from the neighbouring Red Sea and Persian Gulf. Hence, in the present investigation, it is proposed to study the water characteristics and current structure of the intermediate waters in the Arabian Sea through the distribution of the water properties on the isanosteric surfaces of 100, 80, 60 and 4O—cl/t, vertical sections, and scatter diagrams An attempt is also made to present the potential vorticity between different steric levels to understand the circulation and mixing processes. Data collected during and subsequent to International Indian Ocean Expedition (IIOE) are used for this study. The thesis has been divided into six chapters with further sub divisions
The water quality and primary productivity of Valanthakad backwater (9° 55 10. 24 N latitude and 76° 20 01. 23 E
longitude) was monitored from June to November 2007. Significant spatial and temporal variations in temperature,
transparency, salinity, pH, dissolved oxygen, sulphides, carbon dioxide, alkalinity, biochemical oxygen demand, phosphatephosphorus,
nitrate-nitrogen, nitrite-nitrogen as well as primary productivity could be observed from the study. Transparency
was low (53.75 cm to 159 cm) during the active monsoon months when the intensity of solar radiation was minimum, which
together with the run off from the land resulted in turbid waters in the study sites. The salinity in both the stations was low (0.10
‰ to 4.69 ‰) except in August and November 2007. The presence of total sulphide (0.08 mg/ l to 1.84 mg/ l) and higher
carbon dioxide (3 mg/ l to 17 mg/ l) could be due to hospital discharges and decaying slaughter house wastes in Station 1 and
also from the mangrove vegetation in Station 2. Nitrate-nitrogen and phosphate-phosphorus depicted higher values and
pronounced variations in the monsoon season. Maximum net primary production was seen in November (0.87 gC/ m3/ day) and
was reported nil in September. The chlorophyll pigments showed higher values in July, August and November with a negative
correlation with phosphate-phosphorus and nitrite-nitrogen. The study indicated that the water quality and productivity of
Valanthakad backwater is impacted and is the first report from the region
Description:
Indian Journal of Marine Sciences
Vol. 39(1), March 2010, pp. 105-113