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ARPN Journal of Engineering and
Applied Sciences December 2017 | Vol. 12 No. 23 |
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Title: |
Strength of palm kernel oil-based
polyurethane foam/resin as alternative method for ground improvement |
Author (s): |
Nastasa Abdul Samat, Ismacahyadi Bagus
Mohamed Jais, Diana Che Lat, Bahardin Baharom and Mohd. Azwan Salleh |
Abstract: |
Polyurethane has widely been used as a ground improvement for several
years. The advantages of using polyurethane in ground improvement cannot
be denied. Polyurethane foam is a very flexible and lightweight material
which is so useful to increase the strength of soil. Polyurethane are
used as grouting material in order to remediate settlement and uplifting
the effected structure especially foundation to initial position.
However polyol that used for polyurethane production are derived from
petrochemical based. Concerns over petrochemical raw material volatility
and non-sustainable material have caused the interest in substitutes the
use of chemical based polyurethane to palm kernel oil-based
polyurethane. This study perhaps can contribute to overcome those
issues. Particularly, this study involves experimental work to evaluate
the strength characteristic for different ratios of palm kernel oil
based polyol to isocynate to form palm kernel oil based polyurethane (PKO-PU).
The strength was tested using Unconfined Compression Test (UCT) for
sample size of 50mm diameter and 100mm height. During mixing, expansions
for every ratio were monitored. Stiffness and behavior for every ratio
was then being analyzed using stress-strain curve. It is shown that,
increasing in amount of polyol result in increasing the expansion but
reduction in strength. PKO-PU shows rigid characteristics at the maximum
strength which produce strong material, able to resist deformation but
brittle beyond the maximum stress. Further increasing amount of polyol,
PKO-PU shows flexible characteristic whereby it undergoes deformation
but tend to elongate beyond the maximum stress. Higher stiffness and
density recorded for rigid PKO-PU compared to flexible type PKO-PU. |
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Title: |
Processing and materials efficiency in
fused deposition modeling: A comparative study on parts making using ABS
and PLA polymers |
Author (s): |
Yopi Yusuf Tanoto, Juliana Anggono and
Wesley Budiman |
Abstract: |
There
are a lot of materials available on market to make a 3D printing part,
such as ABS, PLA, HIPS, PETG and others. On 3D printing product there
are some responses that could be observe. Some of responses are
processing time, mechanical properties dimension accuracy and others.
This research is conducted to compare the ABS and PLA efficiency on
fused deposition modeling process. Processing time and material
consumption are the factor that used in this research to compare the
efficiency between ABS and PLA. Processing time, and material
consumption were the responses that were measured. The study reports
that both of processing time and material consumption using ABS as a
printing material was found more efficient compared with using PLA.
Printing process using ABS was 2661 seconds, which was faster than using
the PLA was 2808 seconds. For the material consumption, show that the
average mass of ABS was 7, 33 grams compared with using PLA was 8, 17
grams. The estimated value of the Axon is always greater than the value
of the time recording process and measurement of the mass printing
result. |
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Title: |
Regional validation of retracked sea
levels from SARAL/AltiKa over the South China sea and adjacent seas |
Author (s): |
Noor Nabilah Abdullah, Nurul Hazrina Idris,
Nurul Hawani Idris, Muhammad Zulkarnain Abdul Rahman and Wan Hazli Wan
Kadir |
Abstract: |
This
paper focuses on assessing the quality of sea level anomaly (SLA) data
from the new generation of Ka-band SARAL/AltiKa satellite altimetry over
the continental shelf of the South China Sea. The region consists of
peninsulas, shallow seas, and small islands that produce complicated
altimetric waveform patterns. The improved-accuracy of SLAs data from
the MLE4, Ice1 and Ice2 retrackers which are provided in the AVISO-Sensor
Geophysical Data Records (SGDR) were optimized in this study. The
quality of retracked SLAs is assessed by making comparison with tide
gauge data from six stations. In general, the percentage of data
availability of Ice-1 retracker is superior (>68%) to those of MLE-4 and
Ice-2 retrackers. The improvement of percentage (IMP) also shows that
Ice-1 retracker improves the standard deviation >12% better than those
of Ice-2 retracker. Over complex areas of Lubang and Ko Taphao Noi, the
temporal correlation of Ice-1 retracker is superior (r>0.80) to those of
MLE4 and Ice-2 retrackers (r<0.84). The root mean square error (RMS)
error of Ice-1 retracker is the smallest (<10 cm) when compared to the
other two retrackers over both regions. On the other hand, over Vung Tau,
Geting and Bintulu, Ice-2 and MLE-4 retrackers have better correlations
(r>5.8) and lower RMS error (<34 cm) than those of Ice-1 retracker. It
can be concluded that the Ice-1 and Ice-2 retrackers were superior for
the coastal region of Maritime Continent. |
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Title: |
Preventing data collision by enhanced
safety or alert message broadcasting strategy in vehicular Ad-Hoc
network (VANET) |
Author (s): |
R. Thenmozhi and S. Govindarajan |
Abstract: |
A
vehicular Ad-Hoc network (VANET) is a mobile Ad-Hoc network in which
moving road vehicles are network nodes. The major problem faced in VANET
is transmitting the safety message or an ALERT message between the
vehicles to avoid collisions. The large number of vehicles moving in a
particular area will cause the data congestion that results in a long
delay on delivering the messages. Clustering the vehicles into groups is
an efficient approach to broadcast the messages with a less delay and
high delivering ratio. The performance of the clusters is greatly
influenced by the selection of Cluster Heads (CHs). In this paper, the
formation of clusters and cluster head selection is formulated as
optimization problem in order to maximize the efficiency of the network
energy and link quality. The formulated problem has been solved using
two approaches: Density based Clustering and the cluster heads selection
using Differential Evolution (DE) Algorithm. By combining these
approaches the safety or Alert messages will be transmitted easily to
all the vehicles by dynamically adapting transmission power and
contention window size. The performance of the proposed ESMBS protocol
is compared and evaluated against the existing AdvB and CBAPA protocols.
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Title: |
Obtaining of Nb-16Si spherical powders
alloy for additive technologies by mechanical alloying and
spheroidization in electric arc discharge thermal plasma |
Author (s): |
Aleksei V. Grigoriev, Nikolay G. Razumov,
Anatoly A. Popovich and Andrey V. Samokhin |
Abstract: |
Nb-16Si (at. %) powder alloy was prepared by mechanical alloying (MA) in
a planetary ball mill (Fritsch Pulverisette-4) from pure elemental
powders. For the process of Nb-16Si powder spheroidization an
experimental plasma generator based on thermal plasma arc generator with
vortex discharge stabilization was used. Experimental results show that
Nb-16Si spherical powder with a high degree of spheronization using
starting powder fractions of +45-71 µm and +71- 100 µm can be prepared
in a stream of argon thermal plasma with hydrogen additives generated in
plasmatron. It is shown that the main peaks in the X-ray graph after MA
correspond to a solid solution of niobium with a cubic lattice and the
parameter a = 0.333 nm, as well as niobium silicide Nb5Si3 with a
hexagonal lattice (P63/m) a = 0.7536 nm and c =
0.5249 nm. After spheroidization the hexagonal lattice of niobium
silicide Nb5Si3 is transformed into a tetragonal lattice (I4/m) with the
parameter a = 0.6557 nm and c = 1.186 nm. The other phase
components remain unchanged. |
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Title: |
Study on the effect of a variation types
of gas, pressures and coupling sleeves on the performance of monopole
plasma antenna |
Author (s): |
Ahmad Nazri Dagang, Chan Xin Lei and Hajar
Jaafar |
Abstract: |
Plasma antenna is an antenna using ionized gas instead of metal as its
conducting element. Plasma can be formed by energizing glass tubes which
are filled with neutral gases. The main objective of this study is to
investigate the effect of different gases, pressures and materials of
coupling sleeve on antenna parameters of plasma antenna. Previous
studies concentrate on using commercial fluorescent tube with unknown
pressure as plasma antenna, and plasma ionization method using
electroded discharge. This study investigates the parameters of plasma
antenna with 4 different gases (neon, argon, argon-nitrogen and
argon-mercury (fluorescent lamp)), 3 different pressures (1, 5, 10 Torr)
and 2 different materials (copper and aluminium) for coupling sleeve. In
this research, the simulation approach was conducted. The plasma tubes
with constant length and diameter but different gas, pressures and
coupling sleeve were designed. Actual tubes were used and energized
using Dielectric Barrier Discharge (DBD) method in order to calculate
plasma parameters. DBD was used as it can improve discharge lifetime.
Antenna parameters were simulated using Computer Simulation Technology
(CST) software with the resonance frequency is design in a ranged from 1
GHz to 10 GHz. Simulation results show that Ar (5 Torr) with aluminium
coupling sleeve has the best performance in term of return loss by
having the best value at -43.69894 dB. In terms of directivity and and
parameters, fluorescent tube with copper coupling sleeve has the highest
value compared to others, which is 3.376 dBi and 3.3 dB, respectively.
The variation type of gas, pressure and coupling sleeve material gives
different performance of plasma antenna. |
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Title: |
Laser induced forward transfer of
In2O3:ZnO: Au nanocomposite thin film for gas sensitivity application |
Author (s): |
Farah T. M. Noori, N. D. Hamza and A.
Kadhim |
Abstract: |
Indium Oxide(In2O3) and Zinc Oxide (ZnO) nanoparticles were mixed
carefully with gold nanoparticles which was synthesis by turkevich
method with particles size ranged of (73.74 nm ).Different concentration
from these chemical compounds were used to preformed nanocomposite thin
films of thickness of (250-300) nm by using spray pyrolysis method. The
morphlogical properties were studied for all nanocomposite thin film
samples with different concentrations. SEM results showed that all
characteristics of samples in the nano scale. This work has been
extended to study the FTIR properties, which included the transmission
spectrum for all samples, the result showed two main broad metal oxygen
bands. Finally the measurements of the gas sensor showed that the
sensitivity increased when the gold nanoparticles concentration
increasing. |
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Title: |
Optimal power allocation to minimize ser
for multi-relay decode-and-forward cooperative communication systems
using EMA algorithm |
Author (s): |
Rahmanian Koushkaki |
Abstract: |
In
the wireless environment, data transfer suffers from several problems
such as the Multipath propagation, fading and limited range of
transmitters. To solve these problems, a number of solutions have been
developed that one of the newest and most efficient of them is
cooperative communication techniques. In cooperative communications, one
can gain a benefit from numerous advantages such as compensation or
coverage of range limitation effects transmitters, overcoming fading and
creating spatial diversity. Since most mobile units are fed by power
limited batteries, optimal control and allocation of power in these
networks is of particular importance. In this paper, a method for
allocating a limited power the amount of which is determined by
constraints is proposed in a cooperative system of multiple relay Decode
and Forward to minimize the symbol error rate with M-QAM modulation
using two methods EMA algorithm and Lagrange multiplier. Simulation
results show that the symbol error rate performance is the same with
both methods. Since the computational complexity of power allocation
through Lagrange method, especially when there are a large number of
relays, is high, EMA algorithm is an effective method for power
allocation in cooperative networks. |
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Title: |
Evaluate the image quality and the optimum
aberration balance of the optical system with different apertures |
Author (s): |
Ali H. Al-Hamadan, Ghada S. Karam and
Abbas S. Al-Saedi |
Abstract: |
The
image of incoherently illuminated point object (point Spread Function)
will be analyzed theoretically for imaging system with different
apertures. Both free and defocused systems were considered. A new
formula has been derived for determination of the PSF by integration
over different square size pupil apertures. Our studies show that the
optimum balance for square aperture with half diagonal =1 gives a best
Strehl ratio, while the resolution of square aperture with area =p have
a higher resolution, and the tolerance of the different aperture solved
analytically. |
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Title: |
Intelligent estimation of NOx emissions by
flame monitoring in power station using Internet of Things |
Author (s): |
Nallamilli P. G. Bhavani and K. Sujatha |
Abstract: |
The
scrutiny of combustion quality and its equivalent NOx emissions from
flame images in thermal and gas turbine power plants is of immense
significance in the realm of image processing. The principal goal is in
detection, recognition and understanding of combustion conditions
ensuring low NOx emissions. In this work, soft sensors using feed
forward neural network trained with Back Propagation Algorithm (BPA) and
Ant Colony Optimization (ACO) are used for flame image classification.
The scheme uses the information from the color of the flame images as
fundamental which is dependent on the combustion quality and NOx
emissions. The initial gait is to describe a facet vector for each flame
image including 10 feature elements. The distinctive attributes of the
captured images is enhanced using curvelet transform. The perception of
object (flame feature) recognition and classification of the flame image
is conceded out to measure the flame temperature, combustion quality and
NOx emissions from the flame color. The samples including 51 flame
images, parts of which are used to train and test the model. Finally,
the entire samples are recognized and classified. Experiments prove this
method to be effective for classification of flame images. The solution
includes the Internet of Things (IoT) where the intelligent sensors are
connected to the embedded computing system to monitor the fluctuation of
parameters relating to combustion quality. This form is flexible and
dispensable for the infrastructural environment that needs continuous
monitoring, controlling and behavior analysis in power plants. The
working performance of the proposed model is evaluated using prototype
implementation, consisting of Arduino UNO board, intelligent sensors and
MATLAB with Arduino hardware support package. The implementation is
tested for monitoring the combustion quality with respect to the normal
operating conditions which provide a feed control for NOx emissions
monitoring to make the environment smart. |
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Title: |
Analyzing object dimensions and
controlling articulated robot system using 3D visionary sensor |
Author (s): |
Wael R. Abdulmajeed and Alaa A. Hajr |
Abstract: |
Visionary system has been played a significant role in industrial
environment especially in controlling the movement of industrial robot
from objects to targets. In this paper implemented visionary system for
articulated robot system has been build 3D KINECT camera as visionary
sensor linked with controller of articulated robot system (lab-volt
robot model 5250). This work involves constructing integrated in MATLAB
program automatically. It depends on a new approach in analyzing the
robotic environment by a KINECT camera. The approach uses colors to
detect and recognize the locations object and target. Dimensional
properties of object and target (length and center) have been analyzed
and calibrated location and orientations for object and target have been
conducted. The visionary system shows agreed capability for detecting
the location and controlling movement of the articulated robot from
object to target with Minimizing errors. |
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Title: |
Energy optimization in wireless sensor
network using NSGA-II |
Author (s): |
N. Lavanya and T. Shankar |
Abstract: |
The
rapid growth in wireless technology is enabling the variety of advances
in wireless sensor networks (WSNs). By providing the sensing
capabilities and efficient wireless communication, WSNs are becoming
important factor in day to day life. WSNs have many commercial,
industrial and telecommunication applications. The efficient use of
available energy is one of the major issues in wireless sensor network.
The battery life of sensor nodes should be long enough to decrease the
maintenance cost. The multi objective evolutionary algorithms (MOEAs)
are used for solving two or more objective problems. In this paper, we
suggest nondominated sorting of solutions of multi objective problems
using multi objective evolutionary algorithm (MOEA), called as
nondominated sorting genetic algorithm II (NSGA-II). The primary
objective of this paper is prolonging the lifetime of wireless sensor
networks. The energy consumption in the network is optimized such that
lifetime of network is increased. The simulation results show that NSGA-II
provides better solution to select cluster head. The comparison of NSGA-II
with well-known energy efficient algorithm LEACH shows, the proposed
system can increase the network lifetime four to five times more than
LEACH. |
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Title: |
An improvised Power Quality of power grid
using UPGC based on modified neural network |
Author (s): |
Surya Srivastava and Jyoti Shrivastava |
Abstract: |
The
utility of synthetic intelligence is growing fast within the region of
energy electronics and drives. The artificial neural Network (ANN) is
considered as a brand new device to layout manipulates circuitry for
Power Quality (PQ) gadgets. On this paper, the ANN-primarily based
controller is designed for the cutting-edge control of the shunt active
energy clear out and skilled offline the use of records from the
traditional proportional-crucial controller. A
digital-sign-processor-based totally microcontroller is used for the
actual-time simulation and implementation of the control set of rules.
An exhaustive simulation have a look at is executed to investigate the
overall performance of the ANN controller and compare its performance
with the traditional PI controller effects. The machine overall
performance is also verified experimentally on a prototype version
developed inside the laboratory. |
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Title: |
Ezlaki Transform Homotopy perturbation
method for temperature field of a fluid over a stretching
sheet with uniform heat flux |
Author (s): |
Vennila B. |
Abstract: |
In
this paper, the temperature distribution in the flow of a viscous
incompressible fluid caused by the stretching sheet with uniform heat
flux has been discussed. The combination of Elzaki Transform and
Homotopy perturbation method is applied for finding the solutions.
Series solutions for velocity and temperature distribution are achieved
by this method, series solutions are obtained for the non linear
equations caused by temperature field over a stretching sheet and the
results are compared with the exact solutions, this method is seen as a
better alternative method to some existing techniques for such realistic
problems. |
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Title: |
Adaptive video transmission over hybrid
MIMO systems based on the PARAFAC model |
Author (s): |
Martin D. Bravo Obando, Jesus D. Quintero
Polanco and Jose de Jesus Salgado Patron |
Abstract: |
A
hybrid MIMO scheme for video transmission based on the PARAFAC model is
presented. This hybrid scheme is built by modelling the received signal
as a 3D array, or tensor, and the tensor decomposition known as PARAFAC
is used for the recovery of the information in the receiver and the
channel estimation. Additionally, two algorithms for video transmission
that make use of the presented scheme are developed. The proposed
algorithms were built based on the H.264/AVC and H.265/HEVC standards. |
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Title: |
Design and implementation of embedded
tracking system using spatial parallelism on FPGA for robotics |
Author (s): |
Noor Aldeen A. Khalid and Muataz H. Salih |
Abstract: |
The
robot tracking system is one type of utilization system on a mobile
robot and generally utilized as a part of numerous perspectives, for
example, security or military. In this project, we implemented an active
robot tracking system used FPGA platform. The robot can identify and
track objects by using Infrared long range (IR). Perception approach and
motion planning is the most essential part in this project. We used Two
long range IR sensors for the tracking process and to distinguish any
moving object while, the DE0-Nano board is the project platform and the
characteristic of FPGA offer programmability and makes it easier to
implement on different mobile robot platforms. We integrated Sensors
with the DE0-Nano board. In our project a structure VHDL coding is used
for design the robot tracking system and Quartus II 13.0sp1 as a
development CAD tool. The implementation of complex tracking system with
FPGA platform (DE0-Nano) was possible because of the rich logic
elements, a specific sensors characteristics testing and robot stability
was carried out to master those sensors and robot. The result for this
project that already got, shown the frequency for DE0-nano achieved up
to 1.3 GHz, also the total logic elements we used for this project is
4,022 and shown the output reading voltage of the IR sensor is high
reflectivity for the white color object compared to another colors like
blue and black, also the long detection distance. |
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Title: |
upgrading experimental technological lines
for obtaining bio-fertilizers from poultry biowaste |
Author (s): |
Lyubov Sergeevna Dyshlyuk, Svetlana
Yurievna Noskova, Lyudmila Konstantinovna Asyakina and Olga Olegovna
Babich |
Abstract: |
At
this stage of work, a pilot line has been prepared for bioconversion of
poultry waste with the optimum process parameters of temperature of
37°C, pH of 7.5 and duration of 12.0 hours, which includes the
following: A conveyor for poultry waste; a disperser; a sterilizer; a
nutrient medium mixer; a column for continuous sterilization of the
nutrient medium flow; a holder heat exchanger; seed tanks; and an
experimental fermentation reactor. The configuration of the process
areas of the pilot line for biofertilizer production from poultry waste
has been optimized, and three experimental batches of biofertilizers
have been obtained in implementation of three equipment configurations.
It has been found that all tested equipment configurations in the pilot
line are capable of obtaining biofertilizers from poultry waste that
meet the requirements of current normative documents in terms of physico-chemical,
microbiological and safety criteria. |
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Title: |
Fem modelling of human eye for
investigating the thermal effects of tumour on the ocular surface
temperature |
Author (s): |
Sreethul Das and Monica Subashini M. |
Abstract: |
Choroidal Melanoma is a type of eye tumor found in the Choroidal tissue.
Tumor has a very high metabolic activity which raises the temperature of
the tissues in its surrounding. The heat generated by tumor would tend
to increase the temperature on the corneal surface of eye. This
resulting thermal asymmetry and increase in temperature maybe used in
the detection of tumour. The proposed method aims to find out the
variation in temperature distribution on cornea's surface due to the
presence of tumor. A 3D eye model had been developed for this study.
Tumors of various sizes are introduced at different locations in the eye
model. The effects on the corneal temperature with reference to a normal
eye have been studied. The results indicate that the presence of tumors
T2, T3 (maximum in size) can be detected by the proposed method, whereas
the temperature variation in the corneal surface produced by T1 tumour
(least in size) is not significant enough to be detected. This analysis
proved that thermal imaging of the human eye is a promising method in
the detection of Choroidal melanoma compared to the existing diagnostic
techniques. |
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Title: |
Multi-hop chain routing algorithm using a
dynamic coordinator in Wireless Sensor Networks for minimum energy
consumption |
Author (s): |
Sukanya Varshini K., C. Jothi Kumar and P.
John Paul |
Abstract: |
Wireless Sensor Networks (WSN) comprise of a large number of sensor
nodes that have very limited energy in them. The sensor nodes are
deployed in certain places in order to monitor Temperature, Pressure,
Sound and other environmental conditions also. Wireless Sensor Networks
are widely used in various fields such as medical, industrial
monitoring, military surveillance and much more. The nodes in the
network need to transfer data continuously to the Base Station and they
have very limited energy in them. As a result of which the energy of the
nodes decreases as the data gets transferred. It is not an easy task to
replace the batteries of the nodes at all times, hence energy efficiency
plays a very important role in Wireless Sensor Networks in order to
increase the lifetime of the nodes present in the network. This paper
deals with the energy efficiency in Wireless Sensor Networks to minimize
energy consumption of the nodes. The Multi-hop Chain Routing Algorithm
using a Dynamic Coordinator (MCRA-DC) considers various factors like
transmission distance, data volume that needs to be transmitted and the
energy residue of the nodes to select the path for transferring data
from the nodes to reach the Base Station (BS). This algorithm also
ensures that the network is available for a longer time by a frequent
update of the Cluster Head (CH) and the path to reach the BS. The
proposed technique thus increases the entire performance of the network
in aspects of increasing the lifetime of sensor nodes. |
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Title: |
The hybrid method of path planning in
non-determined environments based on potential fields |
Author (s): |
Beloglazov D., Shapovalov I., Soloviev V.
and Zargaryan E. |
Abstract: |
In
this paper, we describe the results of research on the planning of
vehicle paths using a modified method of potential fields. A number of
structural solutions for the modification of this method are proposed.
In order to choose the most suitable solution, we carried out an
analysis of the influence of various parameters of the method on its
functionality. The concept of a local minimum of a virtual field is
given as the main factor limiting the scope of using of artificial
potential fields. Here we describe in detail and analyze the types of
areas of local minima in which the path planning task cant be solved
without modifying the method of potential fields. Based on the analysis
results, an algorithm was developed for the getting vehicles out such
areas using the ant optimization algorithm and virtual goals. The
efficiency of this algorithm is confirmed by simulation of the process
of vehicle motion in nondeterministic environments with extended
obstacles of non-convex form. |
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Title: |
Optimization of performance improvement of
container crane at containers terminal using Genetic Algorithm |
Author (s): |
Andi Hidayat Rizal, Harnen Sulistio,
Achmad Wicaksono and Ludfi Djakfar |
Abstract: |
This
paper is describe as an effort to answer the performance improvement of
container crane (CC) equipment in order to improve the performance of
container terminals. One of the most important determinates of container
handling efficiency is the productivity of container cranes.
Optimization is done with the intention to find solutions to the
performance of container crane equipment in container terminal
operations. The research location is Surabaya Container Terminal and
analysis is performed using Genetic Algorithms (GA). Optimization with
randomize patterns is done through crossover and mutation in the GA
method gives a value which fluctuates in each iteration. From the
results of the analysis carried out, there are three (3) simultaneous
suggestions to improve container crane performance so that the device
operational service on the wharf can be optimized, namely a long wharf,
the number of equipment in operation and coefficient of equipment. The
decision to choose one of the options on the optimal iteration process
needs to consider the conditions on container terminal today. |
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Title: |
Back propagating tree to produce an
optimal path to transmit data in a Wireless Sensor Networks |
Author (s): |
K. Vimal Kumar Stephen and Mathivanan V. |
Abstract: |
Wireless Sensor Networks (WSN) raises number of the challenges with
regard to scalability and energy efficacy. Implemented of Huffman
approaches one of the key variable length in the wireless sensor network
is prolonging network lifetimes. To improve the lifetime of the sensor,
static and movable mobile sinks are deployed. Movable sinks are used to
receive sensed data from the sensor where it is located. Assigning prime
number as the sensor node identity can be easily guessed by the
intruder. Reusing the same identity in the cluster leads to compromising
of nodes. The energy is retained when computation is reduced in cluster
head thereby increases the life time of the particular cluster. Variable
length gives variable length identity and avoids reusing of same
identity hence it avoid network attacks such as random number length of
nodes are not possible (No sensors are allowed inside the network
without the knowledge of Cluster head). Increasing transmission range
future will consume more battery power. |
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Title: |
Gain doubling technique for multi-recycled
folded cascode Op amp in deep submicron CMOS technology |
Author (s): |
Mayur T. Kalkote and Ananiah Durai S. |
Abstract: |
Many
analog design techniques and methodology have been devised for better
performance of amplifier. Now a day operational amplifier is the
backbone of the analog and mixed signal device. It is fundamental block
of the many design circuit that utilize high gain, high bandwidth, fast
settling time. Op amp is one of the basic building block of analog
circuit which has wide range of application such as biomedical
application, ADC converter, switched capacitor filter. This paper
presents the novel structure of folded cascode amplifier for enhancing
the gain. In this quadruple-recycling folded cascode (QRFC) operational
transconductance (OTA) amplifier is used to improve the performance over
the conventional folded cascode (FC), double recycle, and improved
recycle folded structures. The proposed structure uses positive
feedback, cross coupled transistors which significantly improve its
unity gain bandwidth, DC gain and slew rate as compared to others OTA
structures. Circuit level simulations and analysis results done with
180nm CMOS technology validate the improved gain of 95dB for single
stage fully differential mode and enhance bandwidth of 185.2 MHz. |
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Title: |
Optimization of spectrum sensing in
Cognitive Radio by demand based adaptive genetic algorithm |
Author (s): |
Subhajit Chatterjee and Jibendu Sekhar Roy |
Abstract: |
Contemporary wireless communication is administered by spectrum
assignment policy and different measurement studies have proved it to be
incompetent. In cognitive radio network, to enhance the utilization of
radio spectrum, unused spectrum slots of licensed or primary users are
sensed and used by secondary users. In Cognitive Radio spectrum sensing
performance is more important. The most intelligent aptitude of a
cognitive network is to alter the quality of service (QoS) parameters in
the tune of the sensed parameters which is varying with time and
geographical locations. In this paper, the QoS parameters of cognitive
radio, like, bandwidth, signal to noise ratio (SNR), bit error
probability (BEP), are optimized using multi-objective genetic algorithm
(GA). This is adaptive and demand based optimization of cognitive radio
parameters which adapts with the varying nature of available spectrum
holes. Probability of detection and probability of false alarm over a
set of optimized SNR values are also optimized. The simulation results
show that the proposed method gives better real life performance of the
cognitive radio network than the generalized genetic algorithm approach. |
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Title: |
Rotational oscillation of a cylinder in
air flow |
Author (s): |
A. N. Ryabinin and N. A. Kiselev |
Abstract: |
The
paper describes the experimental study of shielding effects of the disk
placed coaxially upstream of a cylinder. It not only reduces the drag of
the cylinder. The disk changes the dynamic characteristics of the
cylinder. Without a disk, an elastically fixed cylinder in the airflow
performs rotational oscillations with constant amplitude. A disk of
small diameter, located near the cylinder, reduces the amplitude of
rotational oscillation. Increasing the distance between the disk and the
cylinder causes the damped rotational oscillations. The influence of the
aerodynamic force on the damping of the oscillations depends on the disk
diameter and the gap between disk and cylinder. A mathematical model is
proposed for describing the rotational steady and damped oscillation of
a cylinder with a disk. |
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Title: |
Design and implementation an effective
energy transfer system for powering the remote implantable biomedical
devices |
Author (s): |
Saad Mutashar, Bassam H. Abed, Jaber H.
Majeed and Jawad K. Ali |
Abstract: |
This
paper deals with the design and implementation of an efficient
sub-electronic circuit to power and transfer data to the remote
bio-implanted devices. The proposed system is designed and implemented
using ASK modulation techniques at 10 MHz operated frequency with
modulation index 11.6 %. The system consists of a modified ASK
modulator, a proposed self-tuning Class-E coil driver with 92.13% of
efficiency and self-threshold cancellation voltage-doubling rectifier to
generate a constant 1.8 DC voltage to power the implanted remote
electronic circuits. The OrCADPspice 16.2 software using specter
simulation with edit 0.35um CMOS process is used to validate the design.
Whereas, the simulation results of the self-tuning Class-E coil driver
is simulated with NI MULTISIM 11. For further testing and validation, an
experimental hardware simulation is also presented using National
Instruments NI circuits design suit (Virtual ELVIS 11) compatible with
NILabVIEW. |
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Title: |
Optimization of palmyra palm sap
fermentation using co-culture of Saccharomyces cerevisiae and Pichia
stipitis |
Author (s): |
Tri Widjaja, Toto Iswanto, Elly Agustiani,
Ali Altway, Belli Martha Judika Silaban and Li Felix Yuwono |
Abstract: |
Palmyra palm sap whose main sugar components can be used for the food
grade ethanol feedstock is potential to increase economic value.
Therefore, its production process needs to be improved especially in
fermentation process. This study aims to investigate the best condition
of the fermentation of palmyra palm sap to be ethanol using co-culture
of Saccharomyces cerevisiae and Pichia stipitisin different variables
such as pH, initial inoculums and sugar concentration to get the best
ethanol fermentation yield. The experiment was designed using
statistical method which is Response Surface Methodology (RSM) and
carried out in batch-wise with a working volume of 100 mL for 80 hours.
The coefficient of pH and inoculum as a linear form and all quadratic
coefficients have remarkable effect on the ethanol yield (P value <
0.05). The fit of model gave high value of R2 of 0.983, indicated that
98.3% of the variability in the response could be explained by the
model. The highest ethanol yield was obtained 0.32 (g ethanol/g total
sugar) with efficiency = 65.42% at pH 5.28, inoculums concentration of
6658612(cell.ml-1)/(g.l-1), and sugar concentration of 120 g/l. |
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Title: |
Designing and modeling of compact
microstrip antennas using new nanocomposite materials |
Author (s): |
Mahdi Sharifi and Pejman Rezaei |
Abstract: |
This
paper is the first applied study on the designing and modeling of
compact microstrip antennas using new polymer nanocomposite magneto
materials. New materials used in designing and modeling process of
compact microstrip antenna are iron oxide polymer nanocomposite magnetic
materials. Polymeric nanoparticles materials are created by iron oxide
nanocomposite materials based on polydimethylsiloxane (PDMS). Nowadays,
several researchers have been proposed magneto materials for minimizing
and increasing the antennas bandwidth. Nevertheless, properties such as
high loss and decreasing control in magnetic properties prevent the
optimal performance of antennas. In addition, the incompatibility and
high complexity prevents integration of conventional magnetic materials
with antennas and standard fabrication processes at printed circuit
boards and wafer levels. Additionally, low losses in magnetic
nanoparticles accompany by the ease of integration of polymer
nanocomposites in standard fabrication processes, suggests solutions to
resolve any of the complications and concerns. So the present paper aim
was designing and modeling of multilayer compact microstrip antenna
using new polymer nanocomposite materials. In this paper, one multilayer
antenna was created using new polymer nanocomposite materials based on
PDMS with two similar microstrip antennas with different iron oxide
nanoparticle concentrations of 80% and 30% by weight. The results showed
that the polymer nanocomposite magnetic antenna performance not only in
the antennas with different operating frequencies were achieved but the
use of new polymer nanocomposite materials related with factors such as
bandwidth and antenna performance and miniaturization. |
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Title: |
Boundary dominated flow in low
permeability reservoir with threshold pressure gradient |
Author (s): |
Jing Lu, Fu Dai and Freddy Humberto
Escobar |
Abstract: |
Due
to the extremely complicated pore structures and strong fluid-rock
interaction, fluid flow in low permeability reservoir does not obey
Darcy’s law. It is non-Darcy flow associated with threshold pressure
gradient. Threshold pressure gradient (TPG) is the level of pressure
gradient that has to be attained to enable fluid to overcome the viscous
forces and start flowing. So, applying traditional well-testing theory
in low permeability reservoir will lead to incorrect understanding of
reservoir behavior; then, a new mathematical model for describing fluid
flow in low permeability reservoir should be established. In non-Darcy
flow in low permeability reservoirs, the fluid flow boundary is
controlled by threshold pressure gradient and extended outward
continuously as production goes on, while reservoir outside this
boundary remains to original conditions. Once the moving boundary
reaches physical reservoir boundary, it is called boundary dominated
flow. This paper presents new mathematical models for boundary dominated
flow under two different conditions: constant pressure boundary and
closed boundary. Analytical solutions are obtained by using Greens’
function with a numerical approximation. It is concluded that, during
transient flow, the pressure derivative is not a horizontal line but a
concave curve which goes upwards. The bigger threshold pressure gradient
brings bigger flow resistance, so the slower pressure wave propagates,
and the later boundary dominated flow starts. During boundary dominated
flow, the pressure derivative is independent of threshold pressure
gradient. A numerical simulation is carried out to validate the
analytical solution and approves the validity of the analytical
solution. The solution proposed in this paper provides a suggestive tool
for well-testing in low permeability reservoir with threshold pressure
gradient. |
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Title: |
A pro-active fault tolerant Deadline Hit
Count based scheduling in computational grid |
Author (s): |
Gokuldev S., Sneha Jayabalan and Harshitha
C. H. |
Abstract: |
In
grid systems, as the number of heterogeneous components increases in the
networks, the chance of failure of resources increases. Identifying the
various faults that occurs and imparting tolerance to those faults has
become the principal area of concern. Many of the existing fault
tolerant algorithms concentrate on increasing throughput and reducing
the response time but consider less on increasing user satisfaction. The
proposed fault-tolerant check-pointing based Deadline Hit Count (DHC)
scheduling algorithm concentrates on increasing the efficiency of the
resource through identifying the faults and reducing the turn-around
time. It also increases the user satisfaction as it combines both the
dynamic check pointing approach and fault tolerant scheduling. In the
proposed technique, a DHC scheduling algorithm with check-pointing is
implemented to identify and pro-actively tolerate faults to select the
appropriate resources. Experiments are performed to assess the
performance of the proposed approach using GridSim tool and have shown
better performance. |
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Title: |
Recent developments in durability of
natural fibre cement/cementitious composites: A review |
Author (s): |
S. Priyadharshini and G. Ramakrishna |
Abstract: |
Natural fibre cement/cementitious (NFC) composites has been gaining
popularity worldwide due to its potential applications in low cost
construction activities. Though there is wide range of opening for NFC
Composite, their long term performance (i.e. durability) under various
exposure conditions is still a question with unsound answer. Many of the
researchers have been working since several decades to overcome this
particular issue by providing a right technology for making NFC
composites, a really potential product under various applications. This
critical review shows a torch on various mechanism of degradability of
natural fibres (NF) and NFC composites under different exposure
conditions, evaluation of durability of natural fibres and NFC
composites, techniques adopted for enhancing durability of NF and NFC
composites. The durability improvement is found to be superior with the
composites containing cementitious material than in the plain fibre
cement composites. Moreover, incorporation/use of modified fibres in the
modified matrix shows better performance under durability testing.
However, many more studies need to be progressed to confirm the present
developments on durability of NFC composites. |
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Title: |
Finite element analysis of the behavior of
rc beams during fires |
Author (s): |
Mazen Musmar, Anis Shatnawi and Nasim
Shatarat |
Abstract: |
A
detailed 3-Dimensional time domain transient thermal stress finite
element analysis was carried out to study the performance of reinforced
concrete beams exposed to fire attack. A FE model that represented a
reinforced concrete beam continuous over one support was developed. The
beam was subjected to ASTM E119 standard fire exposure to the bottom and
side surfaces, in the form of transient temperatures versus time, while
maintaining constant transverse loading on top surface. Material
nonlinearity was taken into account because of the changes in material
properties experienced in fire. The more complicated aspects of
structural behavior in fire conditions, such as thermal dilation,
cracking or crushing of concrete, and yielding of steel were modeled.
The validation of the applicability of the FE model was illustrated by
comparing the finite element solution with the results of experimental
testing carried out for similar RC beams within the same boundary
conditions. The FE analysis showed that a reinforced concrete flexural
member properly designed to fail in flexure at ambient conditions, would
experience the same mode of failure when exposed to realistic fire
exposures. |
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Title: |
Latency aware IPv6 packet delivery scheme
based battery-free WSN |
Author (s): |
S. Pradeep, Atluri Ramakrishna and Kakarla
Vamsikrishna |
Abstract: |
This
working environment gives a diagram of the present best in class of the
RFID innovation in the Tuner Sensor Network (WSN) field. The distinctive
RFID decisions are depicted with their advantages and disadvantages. The
advantage and limitation of electric battery - free individuals radio
collector detecting component in light of RFID innovation are displayed.
In this way, the paper portrays the outline of an UHF RFID incorporated
circuit intended to gather and store the power from an entrance RF
motion in requesting to arrangement Low power simple or advanced
locator. Without battery radio correspondence, surgical process for
mechanical observing gadget utilizing the planned IC has been exhibited
by actualizing two remote sensors that screen both temperature,
utilizing a thermistor, and weight, utilizing a business computerized
sensor. This work gives a diagram of the present best in class of the
RFID connected science in the Receiving set Sensor Network (WSN) field.
The advantages and impediments of siege - free radio set detecting
components in view of RFID innovation are displayed. In this manner, the
paper portrays the development of an UHF RFID incorporated boundary
intended to reap and stores the power from an approaching RF motion all
together of extent to supply low power simple or advanced finders. The
National Intelligence Community has been executed utilizing a minimal
effort 0.35µm CMOS technique and it joins a serial production fringe
gadget interface (SPI) keeping in mind the end goal to speak with the
sensor. Without battery, remote operation for mechanical checking
utilizing the planned IC has been shown by executing two remote sensors
that screen both temperature, utilizing a thermistor, and weight
utilizing a business advanced sensor. |
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Title: |
An overview of existing evaluation metrics
for 3D mesh segmentation |
Author (s): |
Khadija Arhid, Mohcine Bouksim, Fatima
Rafii Zakani, Mohamed Aboulfatah and Taoufiq Gadi |
Abstract: |
The
evaluation of mesh segmentation has received a great deal of attention
since 3D mesh segmentation is an essential step in many mesh operations.
For this reason, notable efforts have been made towards a better
evaluation of mesh segmentation methods, and one of the most popular
works is the benchmark of Chen et al., which allows a quantitative
evaluation of mesh segmentation algorithms. Based on the given data
sets, which comprise manual and automatic segmentations, many evaluation
metrics have been proposed recently. In this context, we present in this
study an overview of the existing similarity metrics and new ones
proposed in our previous works addressing the problem of evaluating 3D
mesh segmentation by describing each method and giving an extensive
study and experimental comparison of them. |
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Title: |
Linear and nonlinear predictive control
algorithms applied to a heated tank system |
Author (s): |
Diego F. Sendoya-Losada and Johan Julian
Molina Mosquera |
Abstract: |
In
this work a number of model based predictive controllers have been
designed in order to regulate a (nonlinear) heated tank system. First,
two controllers according to the EPSAC algorithm were designed, one with
fixed and one with variable time delay. This algorithm requires a linear
model, so the model was linearized around a certain equilibrium point.
This gives bad results when the set point lies far from the equilibrium
output temperature. The results obtained with a variable delay are
better than when the time delay is assumed to be constant. Secondly, a
NEPSAC controller was designed. A big advantage is that no linearization
is required. Consequently, a correct model is available at each point.
This explains why NEPSAC gives the best results of all controllers: a
low settling time, no overshoot and equally good results for all set
points. The influence of the prediction horizon was also investigated. A
higher value for the prediction horizon results in a calmer system
because the controller takes into account more future values. There are
less fluctuations in the input and the output converges with less
overshoot, but slower. Finally, the NEPSAC controller was tested on the
real heated tank system. The tests show that despite a faulty model and
a high sensitivity to noise, the controller still gives surprisingly
good results. These are comparable to the simulation results. It can be
concluded that the NEPSAC controller is very robust. |
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Title: |
Developing a new features approach for
color food image segmentation |
Author (s): |
Salwa Khalid Abdulateef, Massudi Mahmuddin
and Nor Hazlyna Harun |
Abstract: |
Image
segmentation technique was widely used in pattern recognition to
estimate calories. However, the process of segmentation multi-food
images is more difficult. In this paper, segmentation of color food
images for segmenting food images is proposed. The segmentation
technique segments food image into two regions: foreground and
background. In addition, it can separate between food items in the
plate. In this article, a new features based on k-means algorithm are
developed for food image segmentation. The results show that the
proposed segmentation technique based on A, B and neighbors features has
been achieved successfully segmented food images with preserving
significant features and removing the background. |
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Title: |
Identification, assessment and improvement
of collapsible soils: Case of tufas soils of Casablanca- Morocco |
Author (s): |
K. Ouatiki, L. Bahi, L. Ouadif, A. Bahi
and S. Amgaad |
Abstract: |
Collapsible soils correspond to metastable soils that can exhibit a
large change of volume due to wetting with or without extra loading.
Consequently, they are susceptible to cause significant deformations at
their saturated state, which represent real challenges to geotechnical
professions. In fact, numerous soils can fall in the category of
collapsible soils but contrariwise, they can show at the same time high
degree of stability and can support heavy loads under their natural
water content. The present research aims to suggest a method to conduct
when collapsing behavior is detected in materials used during
geotechnical projects, based on three parameters: potential of collapse,
thickness of layers and stress level. To do so, we conducted
experimental work included Atterberg limits, Particle size analysis
(sieving and sedimentation) and Value of Methylene blue to a group of
five undisturbed specimens obtained in the city of Casablanca. They have
approximately similar characteristics: tend to vary from slightly
plastic to medium plastic, mostly made of fine grains with a wide
distribution of particles and have a small value of fineness modulus.
The low dry density, and the high void ratio and stiffness
characterizing the five undisturbed tufas samples Had lead us to
elaborate an oedometric test without changing the initial water content,
and then we had recorded the settlement once the equilibrium reached
when the soils were wetted till saturation under a stress of 60 KPa, 100
kPa, 140 kPa, 200 kPa and 240 KPa. Assuming that every infrastructure
work has its critical collapse potential that can be admitted, and in
light of the oedometric test results, we can improve the serviceability
and reduce the cost and the frequency of rehabilitation by either
reducing the support section without making any change to the thickness
of the layer or deepen the tread with maintaining the one dimensional
compression. |
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Title: |
Development of an Expert System Algorithm
for diagnosing cardiovascular disease using Rough Set Theory implemented
in MATLAB |
Author (s): |
Aaron Don M. Africa |
Abstract: |
Cardiovascular disease refers to conditions that involve narrow or
blocked blood vessels. This disease when remained untreated may lead to
a heart attack. When a person has a cardiovascular disease, the heart
may not be able to pump enough blood to the body. When there is
insufficient blood the brain or other organs may become damaged.
Cardiovascular disease is challenging to diagnose because its symptoms
may be mistaken for other diseases. Early detection, if a person has
cardiovascular disease is a big advantage in combating the ailment. This
is because diagnosing the disease early may reduce the complications it
may bring. This research will develop an Expert System Algorithm for the
diagnosis of cardiovascular disease. This research will guide the person
diagnosing the disease to provide the appropriate recommendation. The
Rough Set Theory will be used to reduce the rules so it can be easily
diagnosed. This research will utilize the Statlog Heart Data Set of the
UCI machine learning repository. Matrix Laboratory or MATLAB will be
used to implement the system. |
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Title: |
Variational iteration transform method for
solving burger and coupled burger’s equations |
Author (s): |
Ali Al-Fayadh and Hasan Ali Khawwan |
Abstract: |
In
this paper, Variational iteration transform method is employed to
determine the exact solution of the Burger equation which 1-dimensional
and coupled Burger’s equations nonlinear partial differential equation.
This method is combined form of the Laplace transforms and Variational
iteration method. The explicit solutions obtained were compared the
exact solutions. The method finds the solution without any restrictive
assumptions and free from round-off errors and therefore reduce the
numerical computation to a great extent. The method is tested on two
examples and coupled Burger’s equations. The results show that new
method is more effective and convenient to use and high accuracy of it
is evident. |
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Title: |
Using GIS and SWAT model for hydrological
modelling of Oued Laou Watershed (Morocco) |
Author (s): |
Ilias Semlali, Latifa Ouadif, Khadija
Baba, Ahmed Akhssas and Lahcen Bahi |
Abstract: |
In
Morocco, study and water resources management in a watershed faces
several challenges that make it more and more difficult. These
challenges are mainly linked to the topography of the area, climate
change and poor land use. In order to meet these challenges and to
ensure the rational and efficient management of water, it is Necessary
to use and develop spacial and physical hydrologic models to allow as
easily and realistically as possible a simulation of the functioning of
watershed systems. This study consists in using a Geographic Information
System (GIS) for Hydrological Modeling based on a GIS model (SWAT Model)
in order to perform an overview of the study area (Watershed of Oued
Laou), and also to demonstrate the impact of climat change on soil
geology, its proporties and on the watershed's water resources. Our
study area covers a surface of 930 km² stretching over the Haut Rif
mountains. This area is characterized by zones of steep slopes and
different climates, which makes the soil favorable for landslides and
erosion phenomena. This study has allowed us to come up with a water
balance of the study area and to model water circulation while based on
climate data, soil types and land-use in the study area. |
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Title: |
Iterative parallel genetic algorithm for
detecting communities in social networks |
Author (s): |
Nikhil K. S., Ambika B. and M. V. Judy |
Abstract: |
A
social network is basically a graph where nodes or vertices represent
users/actors and links or edges represent the relationship among the
actors. Analysis of social networks, especially community detection, is
a continuously evolving research area. Genetic algorithms have been
proven to be a fruitful method for detection of communities in social
networks but the user time taken to detect these communities in large
scale networks is quite considerable. In this paper, we enhance a simple
genetic algorithm with optimum population size, mutation rate and
selection strategy by parallelizing with MapReduce architecture for
detecting quality community structures in a shortened time frame. We
have used an enhanced framework for MapReduce which increases the
performance of the genetic algorithm in a distributed environment. The
result shows that the iterative parallel genetic algorithm (IPGA)
converges to the optimized solution faster than the traditional method. |
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Title: |
Sustainable vest -pocket parks as an
effective tool in sustainable urban design-Egypt |
Author (s): |
Farrag Nermin Mokhtar and Ibrahim Vitta
Abdel Rehim |
Abstract: |
With
the rapid increase in population and the enlarged accumulation of
buildings in Egypt, green areas shrunk, to reduce the share per person
much less than in developed countries which led to appearance of several
environmental and social complications. In view of the current existing
design of the small spaces between residential units, they suffer from
poor design and high cost, making them less popular. The research
purposes to achieve sustainability in designing spaces between
residential units (vest -pocket parks) and to recognize remarkable local
and international experiences to comprehend and discover the advantages
and disadvantages, as well as comparing the cost of construction with
traditional materials and methods and the use of some methods that
decrease the cost in the long term and achieve sustainability. The
research furthermore seeks the participation of users and the Designers
throughout constructing and implementing a questionnaire. The research
ends with the selection of an open space between residential units (Zahraa
Al Helmiya City- Helmiya El Zatoon-Cairo) as a case study to acquire a
sustainable design as an effective tool in sustainable urban design. |
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Title: |
A new equivalent circuit of the
three-phase induction motor: A case study on current and power factor of
the motor |
Author (s): |
Zuriman Anthony, Erhaneli Erhaneli and
Busran Busran |
Abstract: |
Characteristics of the three-phase induction motors can be analized by
using a conventional equivalent circuit. The parameters of the circuit
can be obtained through of several experiment's results in the
laboratory such as dc test, no-load test, and blocked-rotor test. All
data must be gotten accurately if they are used for predicting the
characteristics of the three-phase induction motor. If one data is not
gotten accurately, the characteristics of the motor can not be predicted
accurately. This study is purposed to give a simple equivalent circuit
for analyzing the characteristics of the 3-phase induction motors by
using only the nameplate and the no-load test data of the motor. So, the
blocked-rotor test and dc test of the motor are not required for the
purposed circuit. This study is focused to discuss about the line
current and power factor of the three-phase induction motor. The object
used in this study was the 3-phase induction motor of 1.5 HP, 380/220V,
Y/?, 2.7/4.7 A, 4 poles, 50 Hz, 1400 RPM. The results of this study show
that the equivalent circuit proposed in this study can be used to
predict the characteristics of the three-phase induction motor,
especially the input current and power factor of the motor with an
accurate rate above 90%. |
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Title: |
Pneumatic actuator as vertical dynamic
load simulator on the suspension mechanism of a quarter vehicle wheels |
Author (s): |
Simon Ka’ka, Syukri Himran, Ilyas Renreng
and Onny Sutresman |
Abstract: |
Most
of all road damage can be caused by dynamic loads of vehicles that
fluctuate according to the type of vehicle that passes. This study aims
to calculate the vertical dynamic load of the vehicle actually which
occurs on road construction after through the vehicle wheel suspension
mechanism. The Pneumatic cylinder that was driven by pressurized air
directly weighs on the Spring and Shock Absorber that contained on the
wheels of the vehicle. The load fluctuations of the medium weight
category vehicle are determined by the regulation of the amount of
pressurized air entering into the pneumatic cylinder chamber pushing the
piston and connecting rods. The deviation that occurs during compression
on the spring and Shock Absorber is substituted into the vehicle dynamic
load equation by taking also the magnitude of the spring stiffness
constant, and the fluid or gas coefficient of the damper. The results
showed that the magnitude of the displacement when the compression force
worked has significantly influenced the amount of vertical dynamic load
of the vehicle that overlies the road construction. Experimental results
using pneumatic actuators instead of real dynamic vehicle loads
illustrate the characteristics of the relationship between work pressure
and dynamic load. If the working pressure of P2 (bar) is given great,
the vertical dynamic load Ft (N) which overloads the structure of the
road is also greater. From the graph shows that shock absorbers have
greater ability to reduce dynamic load vertically when compared to
spring ability. |
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Title: |
An effective fault tolerance method for
collaborative editing with fickle operations |
Author (s): |
G. Sekar and V. Vasanthraj |
Abstract: |
Collaborative editing refers to the editing groups which produce work
products as the collection of individual contribution. We present an
implementation model on how to increase fault tolerance for
collaborative editing systems with fickle operations. Some of the recent
research revealed that collaborative editing systems were constructed by
the Conflict free Replicated Data Types (CRDT). This new approach is
shown to avoid the fault on the every user’s replicas updates that
should not affect the owner’s document. Every user can update their own
document with some updates. At the end, all the updates were transferred
to the owner’s original document. In some case some of the user’s
replica can update with some mismatch updates that can also be reflected
on the owner’s document. So these updates badly reduce the reliability
and integrity of the collaborative systems. The mismatch updates and the
faults cause the whole document lead to lessen its integrity and
quality. In this paper, we carefully analyze, find the mismatch updates
and the replica’s faults towards this type of systems and reduce the
fault tolerance. We define algorithms to find such fault mismatch and
remove that fault replica. Then we produce the original document without
any fault updates. |
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Title: |
Energy balance cascaded multilevel
inverter for photovoltaic application |
Author (s): |
A. Santhi Mary Antony, D. Ramya and D.
Godwin Immanuel |
Abstract: |
Energy balance cascaded multilevel inverter for photovoltaic
application. It is used for less no of power switches, losses,
installation area, voltage stress and converter cost. It is also used
for solar energy that is connected to the micro grid system. It reduces
the transformerless operation and improves the power quality. Ability to
operate in both symmetrical and asymmetrical mode is analyzed. The
results are done with cascaded H bridge (CHB) and flying capacitor (FC)
multilevel inverters. The simulation is done with Matlab Simulink. |
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Title: |
Power quality improvement for wind power
system with DFIG using Predictive Direct Power Control scheme |
Author (s): |
Chellammai C. T. and Mohamed Ghouse S. |
Abstract: |
A new
control technique is proposed in this work for efficient operation of
DFIG (Doubly Fed Induction Generator) operating in unbalanced condition
of grid voltage using Model Predictive Direct Power Control (MPDPC)
along with a power compensator. In MPDPC method, a controlled system
model predicts the imminent behavior of the system over a long range to
regulate the direct reactive and active powers in the stator
instantaneously. Also, MPDPC selects the appropriate rotor voltage
vector which has least ripples using an optimization cost function.
Then, power compensation scheme generates power references to MPDPC
without the amputation of negative sequence components of the stator
current. The proposed method reduces the distortions in the stator
currents and eliminates the electromagnetic torque oscillations. The
effectiveness of the proposed control algorithm is realized in Matlab/Simulink
and the dynamic response of the controller in improving the power
quality is studied. |
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Title: |
Investigation of the Dielectrophoresis
effect on the electrical performance of dielectric liquid |
Author (s): |
M. H. S. Zainoddin, H. Zainuddin and A.
Aman |
Abstract: |
This
paper addresses the effect of the contaminant presence in the power
transformer oil. This transformer oil has been used as liquid insulation
as well as heat dissipation in high voltage transformer. Recent,
researchers have found that ester oil which vegetable-based oil are
capable of outshining the disadvantages of mineral oil such as
non-biodegradable and future scarcity as a potential replacement as
liquid insulation. However, the performance of ester oil is still
arguably, especially in DC energization case. In this present paper,
bridging experiment has been conducted in order to study the performance
of ester oil with the presence of contaminant under the influenced of DC
electric field. This approach will show the effect of polarization and
Dielectrophoresis (DEP) that create a conduction path between two
different potential paths in the electric field and producing motion in
the particles. As an effect of DEP, the contaminant tends to move
towards the higher region electric field and may lead to a more serious
problem, transformer failures. In total, Cellulose particle with two
different conditions, i.e. stirred and unstirred were investigated. A
complete cellulose bridge is observed between two 13 mm sphere
electrodes with 10 mm distance between them. The performance of
dielectric properties is analyzed by correlating the formation time and
breakdown voltage results. |
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Title: |
A study on performance of 11 KV overhead
polymeric and porcelain insulators under contaminated conditions |
Author (s): |
Rajamohan Jayabal and Vijayarekha K. |
Abstract: |
In
recent decades, overhead insulators play a major role in electrical
distribution system for transmitting power through transmission line
over long distances owing to its high insulation strength. Nonetheless
under contaminated conditions, insulation strength decreases due to rise
in pollution levels of environment. Hence, it is required to check the
ability of the insulator by artificial test approaches in polluted
situations. This paper deals with the performance on high voltage 11 kV
rated overhead insulators of polymer and porcelain type under
contaminated conditions based on IEC 60805. Insulators are contaminated
with suitable proportions of NaCl and applied uniformly on the surface.
In this study, tests are carried out on insulators under power frequency
to check for the withstand voltage test, lightning and switching impulse
withstand voltage tests with negative impulses. It is clear from the
experiments done on the insulators that flashover occurs at lesser
voltages when the pollution level is high which in turn increases
conductivity. The relation between leakage current and applied voltage,
under different fixed levels of pollution is observed. |
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