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ARPN Journal of Engineering and Applied
Sciences
August 2013 | Vol. 8 No.
8 |
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Title: |
The design of
waiting and storage areas to improve the efficiency of the
marine intermodal terminals |
Author (s): |
Ferdinando
Corriere and Marco Guerrieri |
Abstract: |
The correct sizing of storage areas in the port
areas is aimed to optimizing the management of intermodal
transport and to ensure efficiency and functionality to the
entire port system. In this paper is proposed a simulation
model for design the port storage areas taking into account
many parameters like: the service time, the randomness of the
arrivals process, the storage capacity in terms of TEU that
can be stored (and handled) in the unit of time. The capacity
of the terminal warehouse is determined by the interrelation
between fixed and static parameters in the short period which
are: i) the extension of the storage area; ii)
the height of the overlapping batteries of container (defined
also like number of “shooting”); iii) the means of
movements; iv) a series of parameters that can vary the
efficiency degree according to the operativity conditions of
the terminal. The optimal level of use is achieved when it is
employed approximately the 60-65% of the maximum storage
capacity; it is kept in account, therefore, a tolerance
necessary in order to make forehead to eventual peaks of
traffic. |
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Title: |
Circular-slotted CPW antenna for WiMAX/C band applications |
Author (s): |
M. Samsuzzaman, M. T. Islam and
M. R. I. Faruque |
Abstract: |
In this article, a circular-slot dual band
antenna fed by a coplanar waveguide (CPW) for WiMAX/C band
applications is presented. The antenna mainly encompasses a
ground with a wide circular slot in the centre, a rectangular
feeding strip and two pairs of asymmetric planar inverted L (APIL)
strips connecting with the slotted ground. By introducing the
two pairs of APIL's, two resonant frequencies, 3.70 for WiMAX,
and 6.75 GHz for C band applications are agitated. The
simulated results show that the proposed antenna has two good
impedance bandwidths (VSWR less than 2) of and 1250MHz which
make it easily cover the required bandwidths for WiMAX
(3.4-3.6GHz) and 4-8 GHz C band applications. Moreover, the
obtained radiation patterns demonstrate that the proposed
antenna has significantly directional and Omni directional
patterns in both E-plane and H-plane. |
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Title: |
Investigating the effect of different
three-phase transformer configurations in single
power source |
Author (s): |
Ahmad Rizal
Sultan, Mohd. Wazir Mustafa and Makmur
Saini |
Abstract: |
This paper investigates the effect of different three-phase
transformer configurations in single power source. New
investigating simulation models for single power source are
presented.
The models of transformer configuration for each side (primary
and secondary) used were Y (wye), Yn (wye-grounded) and D
(delta). The effect of ground fault is determined by
generating station arrangements and transformer
configurations. The simulation of single power source showed
the performance generator within the SLG fault at various
three-phase transformer configurations. Simulation was
conducted in PSCAD/EMTDC 4.2.0 and the results were analyzed,
presenting comparison of the fault impact at different
three-phase transformer configurations. It was clearly shown
that the SLG fault current at the single power source was
highly dependent upon the type of the three-phase transformer
configurations used during the ground fault at the secondary
side of the transformer. |
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Title: |
Bandwidth enhancement of a microstrip
antenna for x-band applications |
Author (s): |
Md. Moinul
Islam, Mohammad Tariqul Islam and Mohammad Rashed Iqbal Faruque |
Abstract: |
An X-band microstrip antenna for bandwidth enhancement is
presented in this paper. The proposed antenna is comprised of
circular and rectangular slots fed by a 50 Ω microstrip line.
It is designed on 40 mm×40 mm printed circuit board using FR4
substrate material. Commercially available high frequency
electromagnetic solver HFSS based on the finite element method
(FEM) is taken into account in this study. The impedance
bandwidth (VSWR≤2) of the proposed antenna is 2.10 GHz (9.75
to 11.85 GHz). 1.85 GHz is the average gain where maximum gain
is 2.3 GHz. The antenna exhibits stable Omni-directional and
bidirectional radiation patterns. |
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Title: |
Review on various studies of composite
laminates with ply drop-off |
Author (s): |
Priyanka
Dhurvey and N. D. Mittal |
Abstract: |
A review on various studies of composite laminates with ply
drop-off is presented in this study. Tapered laminated
structures, which are formed by dropping of some of the plies
at discrete positions over the laminate, have received much
attention from researchers because of their structural
tailoring capabilities, damage tolerance, and their potential
for creating significant weight savings in engineering
applications. This study is a comprehensive review, devoted to
static and dynamics analysis, buckling analysis, Vibration
analysis, delamination and interlaminar stress analysis of
laminated composite plates and beams, tapered laminated
structure with ply drop-off. Overall remarks drawn from the
reviewed works are given in the final section of the paper. |
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Title: |
Characterization and evaluation of
magnesite tailings for their potential utilization: A case study
of Nyala magnesite mine, Limpopo Province of South Africa |
Author (s): |
Sibanda Z., Amponsah-Dacosta A and Mhlongo S.E |
Abstract: |
Magnesite has many uses and these include the preparation of
cement, decolouring agents, fertiser, animal feed, and its use
in refractory and refractory products. Extraction of magnesite
generates huge amount of waste such as tailings and spoil
materials. These magnesite tailings are generally inert and
therefore their possible uses can be identified and evaluated.
The main objective of this study was to characterize and
evaluate the tailings of the derelict Nyala Magnesite Mine for
their potential uses. This involved physical and chemical
characterization of the materials and determining general
geometry, volume, and area coverage of the waste dumps. These
tailings dumps were found to be highly eroded and the total
volume and area coverage were 953862 m3 and 102713
m2 respectively. Based on laboratory analyses the
tailings were classified as well-graded sand with Cu ≥6
and 1≥ Cc ≤3. The physic
al properties of the tailings were compared with those of the
soils used as fill material in foundation and/or road
construction and river-sand used for different engineering
purposes. The filling material possessed the same properties
as tailings and was also classified as well-graded sand whilst
the river sand was classified as poorly-graded with Cu ≤
6 and/or < 3. In addition, the tailings material has the
plastic index of 19 and composed of high silica level (±43.32%
SiO2). Based on the determined engineering
properties of tailings and the fact that they are
characterized by high SiO2 content, it was
concluded that they are suitable for use in different
engineering works requiring well-graded soils with medium
plasticity, medium dry strength and medium swelling potential.
It was recommended that the local community use this material
for different engineering applications as it will contribute
in cleaning up the environmental impacts of the historic Nyala
Mine. This will also have socio-economic benefits as it will
improve the aesthetic appearance of the landscape, convert
mine tailings into useful resources and provide an alternative
for river-sand used in various construction works. Moreover,
it will eliminate or reduce the environmental and
socio-economic impacts of excavating construction soils from
borrowed pits. |
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Title: |
Estimating the optimum operating parameters
of olefin metathesis reactive distillation process |
Author (s): |
Abdulwahab
GIWA and Saidat Olanipekun GIWA |
Abstract: |
This work has been carried out to apply Fletcher Reeves,
Quasi-Newton, BOX, SQP, and Mixed algorithms to estimate the
optimum operating parameters required for the achievement of
high purities of trans-2-butene and trans-2-hexene as the top
and the bottom products respectively using olefin metathesis
process occurring in a reactive packed distillation column.
The process was modeled and optimized with the aid of Aspen
HYSYS. The model had a trans-2-pentene feed stream containing
1 ppm each of trans-2-butene and trans-2-hexene flowing at the
rate of 35 mL/min into the column at a temperature of 298.15 K
and a pressure of 1.125 bar. The results obtained from the
optimizations of the process revealed that the constrained
optimization was better than the unconstrained one for this
process because, in the single objective function
optimizations that was carried out, the top and the bottom
products were desired. It was discovered from the constrained
optimizations carried out that Mixed algorithm was the best
among the algorithms considered because it was able to give
optimum reflux ratio of 2.50, optimum feed flow rate of 43.75
mL/min and optimum reboiler duty of 0.28 kW that gave
trans-2-butene of mole fraction value of 1.0000 and
trans-2-hexene of mole fraction of
0.9422 as the top and the bottom products, respectively. |
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Title: |
Effect of extending the radial superposition
function to other flow regimes |
Author (s): |
Freddy
Humberto Escobar, Hernan Dario Alzate and Leonardo Moreno |
Abstract: |
Nowadays, the oil industry is
focusing its effort and interest on gas shale reservoirs. Gas
shale wells are normally tested by recording the flow rate
values under constant pressure conditions. Therefore, time
superposition is required in order to conduct transient-rate
analysis which normally uses the radial solution of the
constant-rate diffusivity equation. This superposition
function is also applied indiscriminately to other flow
regimes without considering the possibility of an existing
error. The literature only reports a case where this situation
is dealt with. However, the analysis is performed using
curve-decline matching.
This study
presents the analysis of the effects generated by extending
the superposition time function generated with the
constant-rate radial solution of the diffusivity equation to
other well-known flow regimes. The work consists of performing
simulations for the following scenarios: variable rate under
constant well-flowing pressure, uncontrolled changes in flow
rate, isochronal uncontrolled changes in flow rate, isochronal
increasingly changes in flow rate and isochronal decreasingly
changes in flow rate. Superposition time functions were
generated for each scenario to compare each flow regime
(linear, bilinear, elliptical, spherical and pseudo steady
state) superposition function to the radial flow superposition
function. In general terms, it was found that the generated
effects of using the radial time superposition function are
negligible. Even, good values of the average reservoir
pressure with the radial flow superposition function were
obtained. However, it was noted a notorious deviation of the
linear and bilinear flow regime tendencies for
hydraulically-fractured wells. This leads to erroneous
estimation of the fracture parameters. |
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Title: |
Braille glove vibration system for diabetic
affected disabled persons |
Author (s): |
B.L. Shivakumar and M. Rajasenathipathi |
Abstract: |
All over the world, persons who are visually impaired have
used Braille as the primary means of accessing information.
Also, the concept of Braille has been accepted as a universal
approach that works across the boundaries of the world.
Different countries of the world have adapted the system of
Braille to suit their languages. As people age, many of them
are forced to stop reading Braille because of losing the
sensation in their fingertips, a common effect of diabetes and
other diseases. In this paper, Braille glove vibration method
is a device for the benefit of deaf-blind people having losing
sensation in their fingertips, it proposes a new approach to
blind persons to know about computer oriented technologies. |
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Title: |
Environmental pollution and mitigation-
An
overview |
Author (s): |
Eyu D.G.
and Aliu A. O. |
Abstract: |
The environment is man’s immediate surrounding which he
manipulates for his living. These include the air, water,
land, natural resources, flora and fauna, and human beings.
The wrong use of these elements introduces hazards that make
the environment unsafe for living things especially man. The
consciousness of the environmental challenges of our time is a
vital tool for engineers and scientist to take the charge on
how to manipulate the environment to protect, preserve and
improve our natural resources by promoting green technologies
for sustainability and innovations in materials. In recent
years, much emphasis has been on environmental issues,
especially in the developed countries. However, many
developing countries seem to be unconcerned about the impact
of environmental pollution and the importance of appropriate
control measures. Therefore, this paper elaborates on
environmental pollution; types, effect, design for the
environment and waste management as pollution mitigation
approaches for clean environment. The awareness of pollution
hazard and adequate knowledge of mitigation strategies is a
sure way to guarantee a tremendous improvement in our global
environment. |
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Title: |
Efficient cluster centers by using enhanced
k-means with median unique vector optimization algorithm (MUVO) |
Author (s): |
R.
Ranga Raj
and M. Punithavalli |
Abstract: |
Clustering is
the task of grouping a set of objects in such a way that
objects in the same group or cluster are more similar to each
other than to those in other groups. Clustering
can be formulated as the multi objective optimization problem.
The k-means algorithm is used to give a formal solution for
optimization problem by assigning objects to the nearest
cluster centers. But the main drawback is that, it depends on
the initial starting condition of the cluster centers. Thus
the quality of clustering is mainly depends on the
initialization of clusters. To solve this problem this paper
proposed a system named Median Unique Vector Optimization
Algorithm. By using this algorithm it is used to sort out the
correct selection of initial cluster centers for K-Means which
is possibly used to avoid the local optimum problem and may
reduce the number of iterations throughout the clustering
process. |
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Title: |
Finite element analysis of forming limits
for stretch forming of perforated aluminium sheet metals |
Author (s): |
Venkatachalam G., Veer Kumar and Narayanan S. |
Abstract: |
Stretch forming is one of the sheet metal forming process in
which sheets are stretched to get the required shape.
Formability of sheet metal is its ability to form when it is
subjected to cold working process. Formability of a sheet
metal is measured by Forming Limit Diagram (FLD/FLC). The
limiting or failure strains in sheet metal forming are best
represented by a forming limit curve which indicates the onset
of necking over all possible combinations of strains in the
plane. An attempt is made here to simulate the stretch forming
of perforated sheet metals thereby studying its limiting
strain. The uniaxial stretching and biaxial stretching are
performed to get forming limit diagram. The influence of open
area, and hole shape on FLD are studied. Perforated sheet is
modelled with finite element method by using commercial FEA
software ANSYS to calculate the major strain, minor strain and
failure load for both uniaxial stretching and biaxial
stretching of perforated sheet metal. It has been found that
increasing in open area reduces the limiting major and minor
strain. It has also been studied the influence of hole shape
and punch shape on limiting major and minor strain. |
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Title: |
Modeling of the corrosion rate of stainless
steel in marine oil environment |
Author (s): |
Akpa
Jackson. G. |
Abstract: |
Experimental corrosion rate data of two stainless steel grades
(430 and 316) when subjected to a typical oil bearing marine
environment have been generated. Empirical model equations for
predicting the corrosion rates of the two steel grades were
developed using the dimensional analysis of Bukinham-Pi
method. Regression analysis was used to curve fit the
experimental data, thus obtain the correlation factor in the
model equations developed. The model equations were used to
predict the corrosion rates for the two steel grades and the
predicted rates were found to match the experimental rates
perfectly in the time interval investigated. |
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Title: |
Managing
queue stability using ART2 in active queue management for
congestion control |
Author (s): |
G. Maria
Priscilla and C.P. Sumathi |
Abstract: |
Congestion occurs on a link when the traffic is
exceeding the maximum capacity of that link which is a major
problem in today’s world of internet. If the incoming link is
larger than that of the outgoing link, it leads to congestion.
Active Queue Management (AQM) schemes allow router to
proactively respond to congestion by increasing the average
length of its queue. Random Early Detection (RED) AQM
algorithm a solution for congestion has difficulties in
setting the parameters for bursty traffic. Hence an
intelligent AQM technique is needed to reduce the packet loss
by stabilizing the queue. The proposed Adaptive Resonance
Theory 2 (ART 2) RED based AQM an unsupervised intelligent
neural network stabilizes the queue and reduces the queue
oscillations. The results are tested using network simulator
ns 2 and prove that the proposed ART 2 RED AQM best suits for
maintaining the queue stability by reducing the packet loss. |
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Title: |
Estimation of
pollutant emissions from road traffic by image processing
techniques a case study in a suburban area |
Author (s): |
Marco
Guerrieri, Ferdinando Corriere, Giuseppe Parla and
Dario Ticali |
Abstract: |
This paper suggests a methodology based on the
image processing technique able to automatically calculate the
vehicle traffic and its components (light vehicles, heavy
vehicles and motorcycles). The method also allows to evaluate
instant vehicle speeds and, where necessary, to rebuild
vehicle trajectories. Traffic data obtained through the
procedure described below (capacities and speeds) can be also
usefully applied to estimate pollutant emissions from vehicle
traffic per year; therefore, the suggested method employs the
algorithms defined with CORINAIR procedures, implemented in
Copert 4 software. In order to evaluate how effective is the
methodology, an experiment has been carried out in a suburban
area, more precisely in a motorway section approaching the
International airport “Falcone e Borsellino” of Palermo in
Italy. |
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Title: |
Design and
implementation of a prototype for neonatal intensive care
incubator with fuzzy controller |
Author (s): |
Agustín Soto
Otalora, Carlos Andrés Quintero Molano and Oscar Mauricio Losada
Tovar |
Abstract: |
The project involves the design and
implementation of an intensive care incubator prototype
that has a control system embedded in a microcontroller based
on the technique of fuzzy logic, capable of maintaining the
temperature of the newborn through two operation ways:
baby and air. Similarly, it controls the humidity of the
chamber according to the gestational age of the patient. The
prototype also come with a piece of software developed in Lab
View 2010, with which vital variables of the patient are
monitored in real-time, that is to say, skin temperature,
ambient temperature, humidity, oxygen saturation in the
blood and heart rate, using for this, the Zig
Bee communication protocol, chosen for its easy
implementation and connectivity, and communicates
wirelessly with the incubator station. The system has a set of
alarms displayed in the main panel of the computer and
monitoring software, which works visually and will sound in
the event of failures as disconnection of sensor, over
temperature, controller failure or supply failure. |
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