Title: |
Buckling behavior of
partially embedded reinforced concrete piles in sand |
Author (s): |
P. Senthil Kumar, K.
Babu Karuppaiah and P. Parameswaran |
Abstract: |
This paper aims to
unify the structural and geotechnical aspects of the partially embedded
slender reinforced concrete pile-soil system together, specifically
under eccentric loading, where eccentricity is inevitable in actual
practice. Seven reinforced concrete specimens partially embedded in sand
as foundation medium were tested with the various critical combinations
of unsupported length, loading eccentricity and coefficient of
horizontal subgrade modulus of the sand medium. In this study, a simple
approach to predict the buckling capacity of an eccentrically loaded
partially embedded reinforced concrete pile in sand is formulated using
the conventional Davisson and Robinson method combined with the ACI’s
flexural stiffness equation of the slender reinforced concrete column
and also, introducing a reduction factor to account eccentricity.
Comparison was also made between the theoretical predictions and the
test results. |
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Title: |
A simulation software
development for performance analysis of DVS algorithm for low power
embedded system |
Author (s): |
A. Chilambuchelvan, S.
Saravanan and J. Raja Paul Perinbam |
Abstract: |
Energy efficiency is an
important property of mobile and pervasive computing devices. Dynamic
voltage scaling (DVS) is an energy saving technique, achieve this
property by reducing energy dissipation of the core by lowering the
supply voltage and operating frequency. In this paper a simulation
environment for testing of different DVS algorithms under EDF and RM
have been discussed- as there are no standard simulators readily
available in market. The simulator environment provides a framework for
objective performance evaluations of different DVS algorithms. Several
key DVS algorithms recently proposed for hard real-time periodic task
sets have been compared; analyzed for their energy efficiency and
discussed the performance differences quantitatively. It is shown
through simulations that the real time DVS algorithms closely approach
the theoretical lower bound on energy consumption and can easily reduce
energy consumption (15-20%) in an embedded real-time system. |
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Title: |
A novel topology of EMI
filter to suppress common mode and differential mode noises of electro
magnetic interference in switching power supplies |
Author (s): |
P. Ram Mohan, M. Vijaya
Kumar and O.V. Raghava Reddy |
Abstract: |
This paper deals with
Electro Magnetic Interference (EMI) in switching power supplies. The EMI
consists of mainly common mode and differential mode noises. Due to
interference, the efficiency of the equipment reduces and some times the
equipment may be damaged. A procedure to design a novel topology of EMI
filter to suppress these two noises is presented in this paper. |
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Title: |
Settlement and load
distribution analysis of underreamed piles |
Author (s): |
C. Y. Lee |
Abstract: |
This paper presents the
elastic behaviour of underreamed piles in homogeneous soils. The
modified boundary element method is used to obtain parametric solutions
of underreamed piles under axial loading. Consideration is given to the
effect of pile slenderness ratio, pile-soil relative stiffness,
underreamed diameter and bearing stratum on response of underreamed
piles. The characteristic of load distribution along the pile length is
also studied. |
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