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ARPN Journal of Engineering and
Applied Sciences
February 2017 | Vol. 12 No. 4 |
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Title: |
The effects of particle size and
pressure on the combustion characteristics of Cerbera Manghas leaf
briquettes |
Author (s): |
Sutrisno, Willyanto Anggono, Fandi Dwi
Suprianto, Andreas Wijaya Kasrun and Ian Hardianto Siahaan |
Abstract: |
Cerbera Manghas is a plant that is often used as urban greening so that
this plant has the potential to be developed into a source of
alternative fuel in Indonesia. The material of solid fuel briquette is
waste leaves of Cerbera Manghas tree and tapioca flour are used as
binder material. The composition of this briquette is 10% mass of
tapioca flour and 90% mass of Cerbera Manghaswaste leaves. The highest
heating value (HHV) of this briquette is 4167 Kcal/kg. The particle size
of this briquette affects the physical and burning characteristics. This
optimizes research particle size and pressure of the press machine during
the briquette forming process. The two parameters were evaluated for the
combustion characteristics include Flame temperature, Ignition timing,
Burning time, and Combustion rate. The higher value of flame
temperature, ignition time and burning time are caused by the greater
the hydraulic pressure. Besides better the briquettes’quality are
obtained the smaller of combustion rate, so that the briquettes are more
durable and required the ignition time length. The best briquettes of
Cerbera Manghas leaves are those with particle size of 60 mesh and
forming pressure of 2 MPa, which have a flame temperature of 522°C, an
ignition time 268 second, a burning time of 7293 second, and a
combustion rate of 0.0026 gr/s. |
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Title: |
Comparison of selected methods for
measurement of the concrete electrical resistance to chloride
penetration |
Author (s): |
Petr Lehner, Martina Turicova and Petr
Konecny |
Abstract: |
The
paper compares selected experimental measurement techniques for
evaluation of concrete ability to resist chloride penetration. There are
three procedures of evaluation of concrete diffusion coefficient
compared. The paper is aimed at the comparison of diffusion coefficient
based on the chloride profiling and electrical properties of concrete,
namely electrical conductivity and resistivity. There are discussed
methods of rapid chloride penetration test as well as surface
measurement of electrical resistivity using Wenner probe. The comparison
aim is to obtain input data for a finite element numerical model for
probabilistic calculation of durability of reinforced concrete bridge
deck exposed to the chloride laden environment. |
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Title: |
Simulation model of traffic operations on
single carriageway roads: Model calibration and validation |
Author (s): |
Zamri Bujang and Othman Che Puan |
Abstract: |
The
current Malaysian procedure for a detailed evaluation of the capacity
and effects of various road and traffic characteristics for single
carriageway roads, which is adopted directly from the American Highway
Capacity Manual, is inadequate and inaccurate since several aspects used
in the method such as the consideration of the recreational vehicles and
trucks are not directly applicable to the Malaysian traffic
characteristics. The validity of the analysis is debatable since the way
in which the effect of motorcycles on overall performance of the
roadways is considered is not clear. The existing simulation models of
traffic operations on single carriageway roads also suffer from a
similar weakness. Therefore, there is a need to develop a comprehensive
traffic simulation model to carry out this task. Such a model must be
capable of simulating traffic behavior for a range of road layout and
geometry, at junctions and compositions of traffic which include
motorcycles. This paper describes the development of a simulation model
of traffic operations on single carriageway roads to assess and evaluate
the speed/flow relationships and hence the road capacity from the
simulation model for a given road geometry and traffic demand. |
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Title: |
Spectrum occupancy measurement: A case for
cognitive radio network in Lagos, Nigeria |
Author (s): |
Paulson E. N., Adedeji K. B., Kamaludin M.
Y., Popoola J. J., Jafri B. Din and Sharifah Kamilah S. Y. |
Abstract: |
The
proliferation in technologies and with the recent introduction of new
paradigm for wireless communication, the demand for wireless devices has
increased drastically in recent years. This therefore, posed a major
threat on the available frequency spectrum and as a result, an efficient
method for the utilization of the limited frequency spectrum is
required. As the scarcity of frequency spectrum is a major problem in
the telecommunication field, cognitive radio technology has been
identified as a promising solution to this problem. Cognitive radio
allows the opportunistic access of licensed bands by unlicensed users
without causing harmful interference to the licensed user. There is a
need to evaluate the utilization level of the licensed bands in order to
identify which frequency bands can be used for cognitive radio
implementation. Nevertheless, spectrum measurement campaigns have been
conducted mostly in USA and a few other locations around the world. In
this paper, the results of the measurement campaign conducted in Ikeja,
the capital city of Lagos, Nigeria covering the range of frequency 700
MHz up to 2.2 GHz is presented. The measurement results are analyzed and
compared to the frequency allocation table published by the Nigerian
Communications Commission. The results obtained show that the frequency
spectrum is underutilized and therefore a significant amount of spectrum
is available for the future implementation of cognitive radio networks. |
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Title: |
Performance evaluation of beginners
creative industry using Balanced Scorecard method |
Author (s): |
Wiwik Sudarwati, Meri Prasetyawati and
Anwar Ilmar Ramadhan |
Abstract: |
Succeed and grow in the competitive Ners Collection needs to have a good
management system and measured. Collection Ners have gradually improved
the management system among other marketing strategies. Which had been
traditional marketing is now online. The impacts of their online
marketing are increasing the number of sales. The need for evaluation of
the performance of the company to determine whether the increase has
been as expected. To know that we need a measurement of overall
performance, using the Balanced Scorecard has four perspectives:
financial, customer, internal business process and learning and growth.
From the results of performance measurements have to be got creative
industries beginner's performance on the customer's perspective is 3.00,
which means quite. Performance beginner's creative industry on internal
business process perspective is 2.9147 which means very pretty.
Performance beginner's creative industries on the learning and growth
perspective are 3.7698, which mean enough. The overall performance of
the company is 3.1958. This indicates the company has enough
performance. |
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Title: |
Prediction of electrical production from
wind energy in the Moroccan south |
Author (s): |
Elyaqouti Mustapha, Ezzaidi Asma, Bouhouch
Lahoussine and Ihlal Ahmed |
Abstract: |
In
this paper, we present the analysis and the statistical modeling of wind
speed, during 6 years (2009-2014), in Ait Aiaaza region of the Taroudant
province in southern Morocco. Furthermore, we estimate the power and the
electrical energy, produced by the wind turbine, ATB.500.54 that we have
proposed as electrical aerogenerator for the site under study. In fact,
the modeling of wind resources consists of using two methods: first, we
use the direct statistical processing of wind data, afterward; we apply
a mathematical approach to frequency distributions of wind speed. As for
the estimation of the power and the produced electrical energy by the
wind turbine under test, we have modeled the power curve using
polynomial interpolation of Lagrange. |
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Title: |
Quality assessment and correlation
coefficients study of chemical data of well waters in the north eastern
part of prishtina (Kosova) |
Author (s): |
Fatbardh Gashi, Teuta Selimi, Jeton
Shabani, Lafie Latifi and Anile Gashi |
Abstract: |
The
reaction between ground water and aquifer minerals affects ground water
quality significantly, but is also useful to understand the genesis of
ground water. Chemical contamination of groundwater has several
implications for human health. In this study the assessment of water
quality after chemical treatment and correlation coefficients between
different pairs of variables of 6 well water samples in the north
eastern part of Prishtina were investigated. Statistical studies have
been carried out by calculating of basic statistical parameters,
anomalies (extremes and outliers) and correlation coefficients between
different pairs of variables. The statistical regression analysis has
been found a moderately high positive correlation relationship between
EC with Dry residue, TDS and NO2-. Consumption of KMnO4 showed a high
positive correlation relationship with NO2- and Cl- and a moderately
high positive correlation relationship with HCO3-, CO32- and NO3-. From
the results of field work and laboratory analyses it was found out that
well water not fulfill the criteria set by the World Health Organization
and the distribution of pollutants indicated anthropogenic sources of
pollutants; mainly from septic tanks, waste waters, using of chemical
fertilizers and using of water purification which are extensively used
in this area. |
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Title: |
The origin and distribution of silica
mineral on the Recent Surface Sediment area, northern coastline of Rupat
Island, Indonesia |
Author (s): |
Husnul Kausarian, Josaphat Tetuko Sri
Sumantyo, Hiroaki Kuze, Detri Karya and Sugeng Wiyono |
Abstract: |
Rupat
Island is a part of Bengkalis district, Riau province, Indonesia with
the total area is 1,500 km2. The main formations in this island are
Older Surface Sediment (Qp) and Recent Surface Sediment (Qh) with the
recent age of both. Silica sand distributes only on the northern
coastline of Rupat Island from Tanjung Mumbul until Pasir Putih area.
Samples were collected and measured from five locations, which are
Beting Aceh (BA) Tanjung Api (TAp), Teluk Rhu (TRh), Tanjung Punai (TPn)
and Tanjung Lapin (TLp). From these locations, homogeneous
characteristic of silica sand can be found as a white color. Silica sand
source on Rupat Island came from sediment that carried by the sea-flow
of Malacca Strait as the sediment transport agent, it was shown by the
characteristic of the grain which is the round-shape and same size that
were conducted by using microscopic photograph testing. Laboratory tests
using the XRF (X-Ray Fluorescence) and XRD (X-Ray Diffraction) showed
the silica compound (SiO2) has a high percentage above 95%. |
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Title: |
Consistency of the semivariogram-fitting
error on ordinary kriging prediction |
Author (s): |
Nur Ali Amri, Abdul Aziz Jemain and Ahmad
Fudholi |
Abstract: |
Kriging is a construction method that is primarily built based on the
structure of experimental semivariograms and the power of fitting. The
two functions, i.e., classical and robust semivariograms, are used in
the current study. The emivariograms are fitted using two approaches,
namely, ordinary least squares and weighted least squares, whereas the
spherical and exponential functions are utilized for the theoretical
model. The estimation precision is calculated using the root mean square
error. The error use of the root mean squares for predictions was tested
using the mean absolute deviation. |
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Title: |
Coconut fronds as adsorbent in the removal
of malachite green dye |
Author (s): |
Rosmawani Mohammad, Aswinee Tangga Rajoo
and Mardawani Mohamad |
Abstract: |
This
study represents the used of coconut frond (CF) to remove malachite
green dye. This dye is toxic and will cause severe problems to
environment. To investigate the potential of CF as adsorbent, a few
parameters were studied such as adsorbent size, adsorbent dosage,
initial dye concentration, contact time and pH. The results showed that
the CF has the highest percentage of dye removal which is up to 99.91 %
under optimum condition. The experimental data was analyzed with the
Langmuir and Freundlich adsorption isotherm equations. The Langmuir
isotherm model has given a better conformity than the Freundlich model
with adsorption capacity of 18.98 mg/g. This study indicates that CF
could be employed as a low cost adsorbent for the removal of malachite
green dye. |
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Title: |
Flow fields for underwater laying
hydrodynamic structure and its environmental aspects |
Author (s): |
Biprodip Mukherjee and Rathin Biswas |
Abstract: |
The
study was carried out to examine, probe and approximate the flow fields
around a submerged hydrodynamic structure, using an acoustic Doppler
velocimeter. In the experimental setup a cylinder of 5 cm diameter was
placed at a distance of about 5.5 cm away from another bluff body or a
hydrodynamic structure, that is a vertical plate of 5 cm width, both
acting as obstructions to the flow. To carry out the experiment in a
recirculating flume, water flow of 52 lps and flow depth of 20 cm were
maintained. The study was carried out in turbulent flow conditions and
vortex formation was expected around the cylinder. The ADV helped to
determine the velocity and its direction while vortices were being
created around the cylinder and in its wake, and also to record the
velocity and observe its characteristics in the boundary layer. With the
determination of flow fields of the underwater composite hydrodynamic
structures various other environmental issues come into play. This types
of under-laying structures not only helps in dispersion of sediment
decomposition in the river bed but also in this juncture help to get a
free passage and movement area for aquatic fauna for a shallow type of
water channel. Seeing so many advantages of this type of study could
really boost to maintain aquatic ecological balance in addition to the
territorial environment and socio-economic development. |
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Title: |
Transonic flow in a channel with a central
body |
Author (s): |
A. N. Ryabinin and A. F. Suleymanov |
Abstract: |
2D
transonic flow in two channels of variable cross-section with a central
body is studied numerically using solvers based on the Euler and
Reynolds-averaged Navier-Stokes equations. Ansys CFX and SU2 packages
are used. The flow velocity is supersonic at inlets and outlets of
channels. At small inflow Mach number between the supersonic regions,
there is a local subsonic region. The increase in the Mach number leads
to arising and expansion of supersonic regions and rapprochement. At the
moment of coalescence of two regions the shock position abruptly
changes. Computations reveal a hysteresis in the shock position versus
the inflow Mach number. In the certain range of inlet Mach number, there
are asymmetrical solutions of the equations. |
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Title: |
A Cuckoo Search optimization scheme for
non-convex economic load dispatch |
Author (s): |
Mohd. Wazir Mustafa and Abdirahman Mohamed
Abdilahi |
Abstract: |
This
paper presents a Cuckoo Search (CS) based algorithm to solve constrained
economic load dispatch (ELD) problems. The proposed methodology easily
deals with non-smoothness of cost function arising due to the use of
valve point effects. The performance of the algorithm has been tested on
systems possessing 13 and 40 generating units involving varying degrees
of complexity. The findings affirm that the method outperforms the
existing techniques can be a promising alternative approach for solving
the ELD problems in practical power system. |
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Title: |
Removal of iron organic forms from
underground water with application of reagents and electric field |
Author (s): |
Boris M. Grishin, Marina V. Bikunova,
Sergey Yu. Andreev, Nikolay N. Laskov, Aleksandr I. Shein and Olga N.
Zubareva |
Abstract: |
Experimental data on removal of iron organic forms from underground
water with application of coagulation, aeration and imposition of
electric field are presented. Conditions of mixing of coagulating agent
with processed water in electro-hydrodynamic device (EHDD) are shown to
influence the subsequent water purification by filtering through sand
bed. Magnitudes of specific electrical energy consumed for maximum
saving of coagulating agent are defined. Water electric treatment in
region of the Camp criterion magnitudes (2,8-3,4)•104 at specific
electrical energy consumption of (6,7-8,0)•10-2 ?·h/m3 in
electro-hydrodynamic device (EHDD) allows by 27-33% decrease in
polyaluminium chloride (PACl) consumption as compared with reagent
treatment without application of electric field at the same degree of
organic iron removal. |
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Title: |
Two-dimensional model of calculation of
reinforced-concrete composite beams by the method of concentrated
deformations |
Author (s): |
Abdivap M. Zulpuev and Kadanbay Baktygulov |
Abstract: |
The
article offers the construction of slab casts over precast joists with
the use of steel profiled flooring and formation of two-dimensional
model of calculation of reinforced-concrete composite beams with
flexible ties by the method of concentrated deformations, the results of
experimental and theoretical research, and comparison of the results.
The method of concentrated deformations is the most precise to describe
the work of combined beams with ties on linear and non-linear work,
non-linear work of components, and has possibilities for accounting of
real diagram of ties operation and deformation of components’ materials. |
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Title: |
CPW-FED triangular serrated slot antenna
for wideband applications |
Author (s): |
K. V. L. Bhavani, Habibulla Khan and B. T. P. Madhav |
Abstract: |
A
serrated square slot antenna for wideband operations is proposed in this
paper. Coplanar waveguide feeding is used in this design with a wideband
tuning stub. The proposed serrated square slot antenna is operating
between 1 to 20 GHz with huge bandwidth. The serrated antenna is
constructed from square slot antenna which is operating at multibands.
By placing serrated tuning stub, an ordinary rectangular slot multiband
antenna is converted to wideband antenna. Detailed study of design and
analysis are presented in this article. |
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Title: |
Temperature distribution of R-134a through
aluminum and PTFE expansion valve on automotive air conditioning
applications |
Author (s): |
Muji Setiyo, Saifudin, Bagiyo Condro
Purnomo, Budi Waluyo, and Anwar Ilmar Ramadhan |
Abstract: |
Generally, parameters for measuring the performance of air conditioning
system is COP. In a thermodynamic analysis of air conditioning system,
the losses that occur in the expansion valve is not considerable. In
reality, the ice formation layer phenomenon is formed around the
expansion valve during air conditioning system operation. Therefore,
this paper presents a study of PTFE as expansion valve materials to
reduce heat loss. The temperature distribution of R-134a refrigerant
before and after the expansion valve was observed to determine its
effect in comparison with expansion valve made of aluminum alloy. The AC
system used in this study is a car air conditioning system that is
removed from the car and driven by an electric motor. From the test
results with the same refrigerant mass flow, the expansion valve made of
PTFE generates potential heat absorption greater than the expansion
valve made of aluminum. In conclusion, PTFE is promising to be developed
as an expansion valve on car air conditioning system applications. |
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Title: |
Automatic welding speed control by
monitoring image of weld pool using vision sensor |
Author (s): |
Ario Sunar Baskoro, Achmad Zaki Rahman and
Haikal |
Abstract: |
This
paper presents a study on automatic welding speed control by monitoring
of weld pool image using vision sensor to create a welding control
system that able to produce good weld bead appearance and quality. The
monitoring performs on autogenous Tungsten Inert Gas (TIG) welding with
constant-current. In this experiment, welding torch set to be stationary
while stainless steel SS-304 as work-piece placed on moving-table driven
by electric stepper motor. CCD camera captured images of weld pool that
formed during the welding process to be extracted by image processing
algorithm. The pool geometry values that have extracted will be applied
to the real time welding speed control system using Artificial Neural
Network (ANN) system. The result showed that the system developed had
succeeded to produce good weld bead appearance on several current
values. |
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Title: |
Frequency domain based spectroface
representation for face recognition |
Author (s): |
Rahma M. K. Ataherand Shahrel Azmin Suandi |
Abstract: |
This
paper develops a 2-D face recognition system through a combination of
Wavelet transform and Fourier transform with some image enhancement
techniques to the face image. We attempt to find the best enhancement
technique through investigation of several image enhancement procedures
such as normalization followed by histogram equalization, normalization
followed by histogram equalization and then subsequently median filter,
normalization followed by histogram equalization and then Homomorphic
filtering and finally, image enhancement by Homomorphic filtering only.
We further investigate the effect of changing both wavelet functions and
the resolution level of wavelet decomposition. The results reveal that
97% accuracy is achieved using either Daubechies wavelet function or
Symlet wavelet function when the image has been enhanced by Homomorphic
filtering. The change of wavelet function and resolution level shows a
significant impact on the practical performance of the proposed
recognition system. |
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Title: |
Designs and development of Russian
scientific schools in the field of cross-country ground vehicles
building |
Author (s): |
George O. Kotiev, Boris V. Padalkin,
Alexander B. Kartashov and Alex S. Diakov |
Abstract: |
In
the paper reviewed the main development trends of Russian scientific
schools in the field of all-terrain vehicles development. Presents
original designs of all-terrain vehicles, created by domestic
enterprises. The tendencies of Russian all-terrain vehicles development
are considered. |
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Title: |
The rheological properties of the
finishing lime composition with additive based on synthetic
aluminosilicates |
Author (s): |
V. I. Loganina, M. A. Sadovnikova and
Yu. P. Skachkov |
Abstract: |
The
information about the patterns of structure formation of lime
compositions with the additive based on synthetic aluminosilicate . It
is shown that the introduction of additives based on synthetic
aluminosilicate helps to speed dial plastic strength. |
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Title: |
Calibration of zmpt101b voltage sensor
module using polynomial regression for accurate load monitoring |
Author (s): |
I. Abubakar, S. N. Khalid, M. W. Mustafa,
Hussain Shareef and M. Mustapha |
Abstract: |
Smart
Electricity is quickly developing as the results of advancements in
sensor technology. The accuracy of a sensing device is the backbone of
every measurement and the fundamental of every electrical quantity
measurement is the voltage and current sensing. The sensor calibration
in the context of this research means the marking or scaling of the
voltage sensor so that it can present accurate sampled voltage from the
ADC output using appropriate algorithm. The peak-peak input voltage
(measured with a standard FLUKE 115 meter) to the sensor is correlated
with the peak-peak ADC output of the sensor using 1 to 5th order
polynomial regression, in order to determine the best fitting
relationship between them. The arduino microcontroller is used to
receive the ADC conversion and is also programmed to calculate the root
mean square value of the supply voltage. The analysis of the polynomials
shows that the third order polynomial gives the best relationship
between the analog input and ADC output. The accuracy of the algorithm
is tested in measuring the root mean square values of the supply voltage
using instantaneous voltage calculation and peak-peak voltage methods.
The error in the measurement is less than 1% in the peak-peak method and
less than 2.5% in the instantaneous method for voltage measurements
above 50V AC, which is very good for measurements in utility. Therefore,
the proposed calibration method will facilitate more accurate voltage
and power computing for researchers and designers especially in load
monitoring where the applied voltage is 240V or 120V ranges. |
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Title: |
MAC address based smart parking prototype
using solar cell |
Author (s): |
Giva Andriana Mutiara, Anak Agung Gde
Agung and Rini Handayani |
Abstract: |
When
entering a parking building, parking management cannot guarantee a
parking space to a driver. Many times a driver must wasting his time to
find one free space. This leads to waste of fuel, congestion, and
frustration for driver. This paper presents a prototype of a parking
system that enables a driver to reserve a parking space using an
application. MAC Address from driver’s device used as an identifier and
extracted using Airodump-ng. Parallax PING sensor is used at the parking
space to detect the presence of car. An Arduino is used as
microcontroller to control the system. Solar panels are used to provide
power for the system. This system helps a driver to reserve a parking
space before he enters the building, provide certainty to the driver and
eliminating time needed to find a space. |
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Title: |
Risk assessment for entering enclosed
spaces on board ships |
Author (s): |
Mohana Krishnan G. and Manu Menon |
Abstract: |
The
present work provides a systematic and objective approach to assessing
hazards and their associated risks that will provide an objective
measure of an identified hazard as well as provide a method to control a
risk involving enclosed spaces on board ships. An enclosed space is a
space with poor or no natural ventilation which is not designed for
continuous occupancy, where access is limited and which may contain a
dangerous atmosphere. The atmosphere may be oxygen-deficient or
oxygen-enriched and/or contain flammable and/or toxic gases or vapours.
Seafarers or other personnel entering enclosed spaces should be made
aware about the dangers involved, take the necessary safety precautions
and most importantly, ensure that risk assessment on the particular
enclosed space has been carried out. Risk assessment is the process of
gathering data and synthesizing information to develop an understanding
of the risk of a particular work environment. To obtain the risk levels,
a risk assessment process is applied whereby it consist of the hazards
identification, likelihood of it happening and its severity. This is
followed by risk control whereby the hazard is either eliminated or
inactivated in a manner such that the hazard does not pose a risk to
workers who have to enter into an enclosed area. The qualitative method
was to used carry out risk assessment whereby the likelihood of an
incident taking place and the level of severity of hazard were
considered in calculating the risk arising. Results obtained from the
risk matrix can then be used as a guide to reduce or eliminate the
hazards within the enclosed space. |
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Title: |
QFD design methodology and construction of a
type Rover Mobile Robotic platform |
Author (s): |
German Efrain Castaneda Jimenez, David
Julian Monroy Cardenas, Jorge Alexander Aponte, Oscar Fernando Aviles
Sanchez and Mauricio Felipe Mauledoux Monroy |
Abstract: |
This
document describes the process that took place for the realization of a
platform Mobile Robotics Rover type. Details how the methodology Quality
Function Development (QFD) for choosing a suitable Rover prototype was
used and that meets the specifications of the customers surveyed, then
information about the design process used by aid of CAD type is
provided, and completion by the construction process. The results
obtained are collected and achievements that it has fulfilled the
platform. The purpose of the prototype is to meet the specifications
required by customers and design specifications raised for exploration
both structured and unstructured surfaces. |
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Title: |
Novel foodstuff conveyor belts compound
for energy saving: the effect of microwave pre-heating and mixed
fillers on mechanical properties |
Author (s): |
Limhengha S., Limnararat S., Jangchud and
Sriseubsai W. |
Abstract: |
This
research presents an effect of microwave power being utilized in
preheating of a foodstuff conveyor belts compound (FCBc), with or
without mixed fillers, and sulfur at different volumes of 1.0, 1.5 and
2.0 phr respectively. Prior to hydraulic molding press at 150oC, an FCBc
is preheated for one minute through an industrial microwave system at a
frequency of 2.45 GHz along with microwave power of 340, 850 and 1,700
watts whereas the cure time is a time 50%. The result shows that the FCBc
with mixed fillers and 1.0 phr sulfur with microwave power at 340 watts
demonstrates an effective crosslink between the rubber and the fillers
which subsequently produces the FCBc that contains better mechanical
properties, not only at the lower cost on raw material but also the
curing time reduces to 40.20 % per production round. |
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Title: |
Prototype of bracelet detection alarm
sounds for deaf and hearing loss |
Author (s): |
Agustin Soto Otalora, Nicolas Charry
Moreno, David Eduardo Clavijo Osorio and Luz Adriana Guzman Trujillo |
Abstract: |
Currently all technological progress should go in search of satisfying a
need of society, in all contexts: health, work, study, etc. in this
article we plan a prototype bracelet in the field of assistive
technologies specifically for deaf or hearing loss people. the
development of this prototype is able to discriminate sounds an alert or
emergency, in addition to managing a user Interface quite friendly with
additional features like Clock, alarm, among others. For the process of
discrimination of sounds and alert detection system was used as a
training tool, the Artificial Neural Networks (ANN). Was implemented for
the microcontroller DSPIC33EP512GP502 microcontrollers. Previous tests
demonstrate greater efficiency of 75% in identifying three types of
sounds of emergency (ambulance, police, fire). |
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Title: |
Fault detection and isolation in target
tracking and control system using fuzzy control |
Author (s): |
Jafar Khalilpour |
Abstract: |
One
of the important applications of Kalman filter, using its radar systems
to detect and estimate the positions of moving objects. For fixed
targets, targeting a weapons based on how the projectile in the air. But
it is necessary that in addition to moving targets Furthermore, the
prophecies also be used. So for anti-aircraft cannon ballistics both the
problem and obtain the predictive path review Are. Need to calculate
predictive vector estimation of position, velocity and acceleration of
the target. In this paper, fuzzy method to analyze factors that Due to
an error in estimating the impact point, especially when the target is
maneuvering targets are provided. |
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Title: |
Data mining based approach for routing
anomaly detection in MANET |
Author (s): |
S. B. Ninu and S. Behin Sam |
Abstract: |
An ad
hoc routing protocol is a convention, or standard, that controls how
nodes decide which way to route packets between computing devices in a
mobile ad-hoc network. Anomalous route request and route reply will
cause severe damage in the communication process. In order to identify
these types of anomalies, MANETs require the use of data mining to
extract information and patterns derived by the knowledge in routing
process. In this paper we present a data mining based anomaly detection
system which will identify two types of routing anomalies or attacks.
The first one is false route request attack and the second one is false
route reply attack. We show that the proposed method provides
significant prediction accuracy. |
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Title: |
Preparation of aerospace grade carbon
fibrous laminated composite panels with improved performance and reduced
fabrication process defects and flaws |
Author (s): |
Umar Farooq and Peter Myler |
Abstract: |
This
work is concerned with the fabrication of carbon fibre-reinforced epoxy
composite panels with reduced flaws and defects induced by fabrication
process. Sample preparation and mechanical testing of samples are
conducted to ensure quality for their design and development. Many
different methods can be used to fabricate composite samples.
Inexpensive methods are preferred in academic setting to produce samples
having qualities similar to the industrial fabrication processes.
Fabricated samples are inspected and checked with an inspection report
consisting of rejection notice. Despite repeatable fabrication process
rejection rate of fabricated sample is relatively higher and little
literature is available on corrective actions taken to reduce the number
of repetitive errors and defects in the fabrication process. The present
study proposed corrective actions to prevent and reduce recurrence rate
of flaws and defects detrimental to safety and performance of the
product by correcting the root cause. Instant problems, gathered quality
data, information correlation to determine causes, trends, and solutions
have been described. Samples preparations method using press-clave is
described and validity of samples’ quality was checked using visual and
ultrasonic C-scan damage detection techniques. On the basis of
corrective actions the rejection rate reduced up to 50%. This suggests
that the corrective measures and techniques described are adequate for
the assessment of sample quality for both development and fabrication
purposes. |
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Title: |
Vibration analysis of a cantilever beam
for oblique cracks |
Author (s): |
V. Khalkar and S. Ramachandran |
Abstract: |
Due
to limited fatigue strength, the fatigue cracks ours in the material
under service conditions. Cracks are also found inside the material due
to poor manufacturing processes. Single sided cracks are produced in the
material as a result of fluctuating loads. Crack generally may be of two
types, transverse cracks and oblique cracks. The magnitude and
orientation of the manufacturing defect decides the origin of either
transverse cracks or oblique cracks in the beam. Hence it is very
essential to study the effect of top side and bottom side oblique cracks
on the beam. Out of two cracks i.e. top side or bottom side cracks, one
crack will be comparatively more critical, hence it requires much
attention. Crack get propagated in the material due to the action of
fatigue load and at the end, it gives catastrophic failure.
Understanding the dynamics of the cracked beam is of most importance
because various vibration parameters like natural frequency, resonant
amplitude of uncracked and cracked cases of a beam used as a basic
criteria in the crack detection by vibration methods. In this study,
most practical spring steel material (EN 47) is considered for the
cantilever beam. ANSYS software used to find the natural frequency and
zero frequency deflection of cracked cases of beams. Stiffness of
defective beams is calculated by a conventional formula (Load /
deflection). In this study, it is found that the value of stiffness and
natural frequencies for top side cracked cases are comparatively on
lower side than bottom side cracked cases when crack angle equal to 200.
It is also found that up to 100 crack angle, the algebraic sum of
stiffness of top side cracked cases is equal to the algebraic sum of
stiffness of bottom side cracked cases. This condition is true also for
natural frequency. It is also observed that, when crack angle is 200,
then presence of top side crack and bottom side crack of the same
configuration in the cantilever beam is a function of natural frequency,
when cantilever beam is of a square cross section. |
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Title: |
Experiment on sawdust gasification using
open top downdraft gasifier incorporated with internal combustion engine |
Author (s): |
Fajri Vidian, Hasan Basri and Adi
Surjosatyo |
Abstract: |
An
increase in world energy demand leads to a scarcity of fossil fuels.
Producer gas from biomass sawdust gasification is one of the energy
alternatives for the replacement of fossil fuels. The stability of
producer gas from gasification is required for an application on
internal combustion engine. The aim of the research is to develop and
experiment on sawdust gasification system using open top downdraft
gasifier incorporated with internal combustion engine to generate
small-scale electricity. The gasifier feed was sawdust. The capacity of
gasifier was about 2.5 kg per batch, and about 5 kg of sawdust was
consumed per hour. The result of the study showed that combustible gas
was produced after being in operation for 20 minutes. The application of
producer gas on diesel engine could save about 50% on diesel oil. |
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Title: |
Behavior of Bio-Concrete thick slab under
repeated loading |
Author (s): |
Ahmed Sultan Ali and Saba Taher Ojamy |
Abstract: |
Bio-concrete or “Bacterial Concrete” which can be produced by embedding
bacteria in the concrete that are capable to precipitate calcite
constantly and investigate its ability of remedy the network of cracks
formed under repeated loads , its ability to reduce cracks impact on the
concrete performance and improve its mechanical properties. Slabs are
one of the most important parts of the structural construction, in which
the thickness is small compared with the other dimensions and they
sustain loads normal to their planes so in this study eight one way
thick slabs with dimensions (1450*500*120) mm have been casted with two
ways of bacteria addition (direct addition with mixing water and
encapsulated bacteria in breaking bricks stone LWA particles) , six of
them was tested in two stages to find out the effectiveness of bacteria
in repairing the cracks and regain the performance of concrete. The
experimental result showed that the bacterial direct addition specimen
increase the compressive strength by about (11.8%) for bacterial direct
addition, slabs were tested first under repeated loads up to eight
cycles all the slabs with bacterial addition showed improvement in
performance in varying degrees reached (4.85%) for first cracking load
and (4.89%) for load of the eight cycle , and the specimen has been
lifted in water for 28 days, than the second stage was started which was
monotonic test , the main purpose is to investigate the bio-concrete
ability of regain its performance beside its ability of healing the
crack and increase the concrete sustainability, all specimen with both
types of bacterial addition showed improvement in performance that’s
reached (111%) for first crack loading and (5.63%)for ultimate load,
Three-dimensional nonlinear finite element analysis has been used to
conduct the numerical investigation of the general behavior of thick
slabs. ANSYS (Version 15.0) computer software was used in this work, the
comparison between the experimental and numerical results showed a
reasonable agreement (to cycle eight), and the solution of slab under
repeated load until failure has been completed by using numerical
solution. |
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Title: |
Nonlinear control for grid connected wind
energy system with multilevel inverter |
Author (s): |
Hamid Ouadi, Adil Barra and Khalid El
Majdoub |
Abstract: |
This
paper deals with the problem of interfacing a wind turbine generator
with an electrical three phase grid in the presence of nonlinear loads.
Wind systems are generally connected to the grid through an AC/DC
inverter in the generator side, followed by a DC/AC converter in the
grid side. In this work, the considered DC/AC converter is based on
multilevel neutral point clamped topology, and will operates
simultaneously as an interfacing system and as an active power filter.
The control objective is threefold: (i) transferring the extracted
active power from the wind turbine generator to the power grid; (ii)
cancelling harmonic currents and reactive power absorbed by the
nonlinear load; (iii) balancing capacitor voltages and regulating the DC
link voltage. The first and second control aims will be achieved using
the backstepping design technique. The third objective dealing with the
DC link voltage regulator will be achieved with a sliding mode technical
design. The performances of the proposed control system are formally
analyzed using tools from Lyapunov's stability. Simulations show that
the proposed controller achieved the listed objectives under widely
varying load and wind speed profiles. |
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Title: |
0.1-10 THz single port log periodic
antenna design based on hilbert graphene artificial magnetic conductor |
Author (s): |
Hussein A. Abdulnabi, Refat T. Hussein and
Raad S. Fyath |
Abstract: |
In
this work, a single port toothed log periodic antenna (TLPA) based on
Hilbert curve graphene artificial magnetic conductor (AMC) is proposed
for frequency band (0.1–10) THz operation. The bandwidth and resonance
frequency of the proposed antenna can be tuned by changing the connected
DC voltage which leads to variation in the chemical potential of graphene.
The radiating element of the TLPA is gold patch placed on Hilbert curve
graphene AMC. Exponential taper is used to satisfy impedance matching
between the antenna and the feeder over the required frequency range.
The simulation results reveal that 100 % of the frequency range
satisfies s_11<-10 dB when chemical potential is1eV. |
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Title: |
Improving quality of service in wireless
sensor networks using neighbor constraint transmission centric
distributed sink hole detection and network simulator II |
Author (s): |
K. Karthigadevi, S. Balamurali and
M. Venkatesulu |
Abstract: |
With
the advances in technology, there has been an increasing interest in the
use of wireless sensor networks (WSNs). WSNs are vulnerable to a wide
class of attacks among which sinkhole attack puts severe threats to the
security of such networks. The problems of sinkhole detection and
mitigation have been studied through various methods, but suffer with
the problems of high complex detection and overhead introduced by
detection process. The quality of service has been degraded greatly by
the impact of sinkhole attack because the malicious node can read much
information about the source or the communications; this helps malicious
nodes to perform various kinds of attacks. In order to overcome such
drawbacks of network security, we propose a novel approach for sinkhole
detection to support Quality of Service (QOS) development of wireless
sensor networks. The method acts as a distributed one where the sinkhole
detection is performed in all the nodes of the network. The node
collects the neighbor information about the location and other
transmission details. From the collected neighbor information, the node
which presents in many nodes neighbor matrix is identified. The problem
of multiple identification is resolved by verifying the transmission
performed through other neighbors of the malicious node. From the
traffic incurred in the neighbor of malicious node is used to verify the
location or traffic sent by the malicious node. The method produces
efficient results in sinkhole detection and increases the throughput.
Also the method reduces the packet drop ratio and reduces the frequency
of sinkhole detection. |
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Title: |
Study on strength and durability
parameters of geo polymer concrete with GGBS for 12m and 14m alkali
activators |
Author (s): |
Md. Ishaq Jaffery, Y. Himath Kumar and B.
Sarath Chandra Kumar |
Abstract: |
Concrete is a mixture of cement, fine aggregate, coarse aggregate and
water. Concrete plays a vital role in the development of infrastructure
leading to second most consumed material next to water in the world. As
concrete being a versatile material used for wide varieties under
various conditions, ordinary concrete may fail to exhibit the desired
quality, performance, and durability. And also to reduce the cost of
construction and increase the performance of concrete without losing its
original properties is achieved by replacing with suitable pozzalonic
material. This paper deals with complete replacement of cement with
ground granulated blast furnace slag (GGBS). The main objective of this
study is to investigate the strength and durability parameters of
geopolymer concrete for 12M and 14M .For each mix standard sizes of
cubes, cylinders and prisms were casted and tested. For strength at a
age of 3,7,28 days and for durability at a age of 30 days chemical
curing 30 days The obtained results are then compared to conserve the
natural resources along with development of desired characteristics.
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Title: |
Geotechnical characterization of local
materials used in road construction in the Brazzaville Area, Congo |
Author (s): |
David Bilembi, Hilaire Elenga, Timothee
Nsongo, Bernard Mabiala and Adolphe Kimpena |
Abstract: |
The
survey of the road construction materials within the Brazzaville Area in
the Congo was conducted on the geotechnical data of materials collected
from different sites in order to establish a correlation with the norms
of their use in Civil Engineering fields. These data include grading
curves, consistency limits for the fine fraction, modified Proctor test
results and CBR tests. Those data were subjected to classical statistic
processing (characterization of every geotechnical parameter
variability, study of correlations between parameters). The survey
concludes that the material samples analyzed present so close physical
properties that they cannot be clearly distinguished through statistical
analysis. The overall analysis of the CBR index values varies depending
on the materials used. As a consequence. These variations cause the
deterioration of the pavement structure. The constituents that comply
with the above defined physical properties can be used as materials of a
pavement structural layer. The deterioration effects and the granular
fragmentation from the Inkisi formations help appreciate the Micro-Deval
coefficient and the Los Angeles coefficient, for the figures of both
coefficients and result in high figures which mean better basic
mechanical properties of the foundation and structural layers. |
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Title: |
On designing a computational experiment
system for various engineering interpretations of a global optimization
problem |
Author (s): |
A. G. Pevneva, G. M. Penkov and M. D. Bakiev |
Abstract: |
This
article proposes a software system design to achieve a numerical
solution of a global optimization problem. A key part of it is the
classification of global search algorithms by a methodological
criterion, which enables a systematic comparative analysis of specific
implementations of each method within the scope of engineering
interpretations of a global optimization problem. The proposed
architecture accommodates modular extensions of the system, which allows
designing algorithmic modifications of global search methods of various
classes, taking into account the impact of parameter numerical values on
computation performance. |
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Title: |
Neuro-PID control for nonlinear plants
with variable parameters |
Author (s): |
M. V. Burakov and V. G. Kurbanov |
Abstract: |
The
synthesis technique of neuro-PID controller as three-channel structure
in which each channel has piecewise-and-linear activation function which
settings are configured by means of a genetic algorithm is considered in
the article. The given examples of modeling show that the offered option
of the organization of the controller can be successfully used in
control of nonlinear objects with variable parameters for which linear
PID-regulators cannot provide acceptable quality of control. |
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Title: |
Phasor diagram analysis for non-salient
pole synchronous generator |
Author (s): |
Mohd. Zaifulrizal Zainol, Mohd. Adib Hakimin
Ab.Halim Mohd Rohaimi Mohd Dahalan, Fadzrul Izzudin Abd Aziz, Azhar
Othman and Atzroulnizam Abu |
Abstract: |
This
paper presents the analysis of non-salient pole synchronous generator
using phasor diagram. The design of non-salient pole synchronous are
developed by using MATLAB software. From the design of the non-salient
pole synchronous generator, the output characteristic of the generator
can be determined. From the output of the generator, the performance of
the generator such as speed, current, voltage and power can be analyzed. |
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Title: |
Effect of aluminum phosphate on structural
and flame retardant properties of composites fiberglass |
Author (s): |
Asmalina Mohamed Saat, Asmawi Abd Malik,
Adila Azmi, Mohamad Fadzil Abd Latif, Nur Ermadiana Ramlee and Mohd.
Rafie Johan |
Abstract: |
Composite fiberglass boats are basically constructed with three broad
groups of resin, reinforcement and core material. The combination of
these material forms high strength, low density, economic and easy to
manufacture structure for boat construction. In the composite system,
resin is one of components that has high flammability properties.
Phosphate types of fire retardants are well known can increase the fire
retardance properties by the higher retention due to the char formation.
This study was conducted to analyse the interaction of modified
polyester resin and composites fiberglass with aluminum phosphate as new
fire retardance. The interaction mechanism of aluminum phosphate (AlPO4)
was investigated in seven layers composite fiberglass system. The
Fourier Transform Infrared (FTIR) spectroscopy of modified polyester
resin and composite fiberglass showed an improved of reaction bonding
stability at 5wt% of AlPO4 respectively. Flammability properties of
composite obtained using vertical burning (UL 94) test method produced a
similar finding. |
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Title: |
Research on the ship propeller blade to
determine changes in the mechanical properties based on the forces
projection |
Author (s): |
M. A. Ishak, Sulaiman S., Baharudin
B. T. H. T. and Syajaratunnur Y. |
Abstract: |
The
ship propeller is a key component in producing the propulsion force of
the ship motion. Therefore the stability of structure strength is
required to ensure the effectiveness of propulsion force generation.
This research examines the existing ship propeller and the effects of
casted specimen on the changes of mechanical properties of the propeller
structure. The specimen prepared is referred to ASTM E8 2008 standard
and including two projections is Longitude and Latitude projected,
according to the forces analysis exerted on blade structure. The
experiments perform on the used propeller by cutting into pieces of
specimen and casted specimen of copper alloy of Nickel Aluminium Bronze
(Ni-Al-Br). The mechanical testing is conducted on tensile test, tensile
strength and hardness test. The results show strong influence of the
mechanical properties of existing propeller are lower from the standard
requirement and different in each specimen projection of Yield Strength
is 23.67% to 31.84% and the Tensile Strength is 12.20% to 20.17%, and
the elongation percentage is 28.19% to 35%, respectively. The latitude
projection shows greater compared to longitude projection. An
experimental result for the casted specimen showed a reading of
mechanical properties is 3% to 5% difference compared to the cutting
specimen. From the results of these experiments have found that fixing
projections in this study are reasonable and can be used in subsequent
studies and mechanical properties of the material are not homogenous
across the blade structure. Therefore, a comprehensive study should be
undertaken to overcome this problem in the future. |
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Title: |
A CFD RANS cavitation prediction for
propellers |
Author (s): |
Iwan Mustaffa Kamal and Tuan Muhammad Amier
Tuan Mohd. Yusof |
Abstract: |
Cavitation is a general fluid mechanics phenomenon which can occur
whenever a liquid is used in a machine which induces pressure and
velocity fluctuations in the fluid. The analysis of the cavitation of a
screw propeller normally done in a cavitation tunnel is highly complex,
difficult and time consuming. With the advances of the computer, the
numerical prediction of cavitations can be done quite faster compared to
the tedious manual experimentation in a cavitation tunnel. Nowadays new
orientations in analysis of propeller in steady and unsteady flow are
Computational Fluid Dynamics (CFD) method: using Reynolds Averaged
Navier-Stokes (RANS) solver. The flow around propeller can be derived
from the equations of motions using boundary conditions. Therefore the
inception of the cavitation can be predicted. Therefore this paper main
aim is to present the application of CFD in simulating the cavitation
behavior of ship propellers. The propeller chosen for this study is the
Gawn KCA series. The code selected for the CFD in this project is FINETM/TURBO.
The results of the simulated cavitation in CFD were validated with
existing experimental data. The sheet cavitations at the suction side of
the propeller blade modelled by the CFD were found to be in close
agreement with the existing experimental results. It was found that the
CFD somehow failed to model the tip vortex cavitation occurring at the
tip of the propeller blades. |
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Title: |
Investigation on the effect of bulbous bow
shape to the wave-making resistance of an ultra large container carrier
(ULCC) |
Author (s): |
Hamdan Nuruddin, Iwan Mustaffa Kamal,
Muhammad Nasuha Mansor and Nik Muhammad Hafidz |
Abstract: |
The
bulbous bow of a ship reduce the wave-making resistance of the vessel by
adding another wave system which is created by the bulb and this
interfere with the wave system created by the bow of the vessel. These
two wave system partially cancel out each other and reduce the wave
elevation and the wave making resistance. The main aim of this project
was to evaluate the effect of fore-body shape particularly the bulbous
bow to the wave-making resistance of an ultra large container carrier.
It was also the aim of this project to identify the optimized form of
the bulbous bow design. The general idea is a set of bulbous bows is
systematically created based on the bulb parameters. A commercial CFD
code SHIPFLOW computes the flow and the pressure distribution around the
hull. With these results the wave-making resistance of systematically
varied were analyzed. An optimized bulbous bow design was chosen over
other 27 bulbous designs. It was found that the wave resistance can be
reduced by lengthening the bulb protruding length, widening the bulb
breadth and increasing the bulb height. |
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Title: |
A smart trolley with RFID implementation:
A survey among customers |
Author (s): |
Ismila Che Ishak, Muhammad Munawwir
Muslim, Shaiful Bakri Ismail, Muhammad Abdul Mun’aim Mohd. Idrus and
Maziah Mat Ali |
Abstract: |
Smart
trolley with Innovative RFID is proposed to facilitate users while
shopping. It provides several benefits such as to facilitate users to
search for things quickly without looking for assistants from promoter
for the location of the items, to inform customers the amount of goods
purchased and to allow customers to control financial budget while
shopping. The main objective of this research is to identify the results
of a market survey on a smart trolley with innovative RFID
implementation among the users. The scope of the research is conducted
among staff, customers and suppliers in Giant Hypermarket, Bandar Seri
Manjung, Perak. A total of 250 questionnaires has been distributed to
customers, staffs and suppliers. 200 questionnaires were collected which
consists copies from 140 customers, 50 Giant Hypermarket staff and 10
suppliers. Three elements tested in the research covers on spending
time, budget control and product layout. These elements are selected as
an indicator from customers to enhance the importance of smart trolley
implementation. Based on the mean, it shows that the highest element
feedback from customers is budget control, it is because this new smart
trolley could assist customers in purchasing expenses while shopping,
thus it will help their money flow. |
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Title: |
Crawling ROV for irregular terrain
seafloor discovery |
Author (s): |
A. A. Makarimi, G. M. Fadli, R. R. Hafidz, A. M.
Ibrahim, A. Atzrounizam, M. S. Noorazlina, A. J. K. Arieff and N. A. A. Azfar |
Abstract: |
Underwater Remotely Operated Vehicle (ROVs) have a significant support
role and play a dominant underwater robotics which has very high demand
in marine and offshore field. A bottom founded-ROV give an additional
value from normal ROV to expand research and survey on seafloors. Known
as UniKL Amphibious Research Crawler I (UARC I) is designed to operate
underwater and in the surface zone up to a depth of 15 meters and it
equipped with the video camera. This vehicle is controlled by a
controlled cable from the beach or boat up to the distance of 15 meters
for inspection and seafloor discovery. This vehicle specially design to
withstand with the Malaysia irregular terrain seafloor. The simulations
of the dynamic motion for climbing over a hump and the slip
characteristics shows the vehicle can work very well, and it reveals the
physics of the crawler-type ROV’s motion. Capable of carrying the load
up to 15 kg with the body weight of 13.5 kg it can allows the
enhancement with the robotic grips or additional accessories in the
future. It is good start to fabricating the light weight crawling ROV
with effective cost and can works at any asymmetrical terrain and sand.
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Title: |
CFD analysis on the effects of exhaust
backpressure generated by four-stroke marine diesel generator after
modification of silencer and exhaust flow design |
Author (s): |
Ridwan Saputra Nursal, Abdul Hadi Hashim,
Nor Isha Nordin, Mohd. Afandi Abdul Hamid and Mohd. Redzuwan Danuri |
Abstract: |
This
study is to analyze the exhaust backpressure of older and new exhaust
piping design and silencer or muffler position after modification of the
exhaust system of a 4-stroke marine diesel generator which operates at
Marine Generator Workshop, Ungku Omar Polytechnic, Malaysia. The purpose
of the exhaust system modification is to collect the exhaust gases
produced inside combustion chamber of the engine cylinders and discharge
them as quickly and silently as possible to atmosphere. Generally the
better a silencer or muffler is at attenuating sound the more
backpressure is generated. In a reactive silencer where good attenuation
is achieved, the exhaust gases are forced to pass through numerous
geometry changes of exhaust system and a fair amount of backpressure may
be generated, which reduces the power output of the engine slightly.
However, too much backpressure generated may led the power losses,
weakening the engine performance and increased the fuel consumption.
Henceforth, the study is aims to find the relationship between the
exhaust backpressure levels occurred in exhaust flow design as well as
silencer position and yet propose the best design to ensure the
optimization of engine performance. The actual dimensions of the exhaust
system is used to perform the computational fluid dynamic (CFD)
simulation and analysis. The performance of an exhaust system is based
on velocity and exhaust backpressure. Investigation in CFD was performed
on four parameters comprises manifold temperature, manifold pressure,
exhaust piping system temperature and atmosphere pressure. Results of
CFD simulation was showed in the form of pressure and velocity contours
and streamline. This study found the modification of exhaust piping
design of the 4-stroke marine diesel generator increased the
backpressure up to 94.7%. |
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Title: |
A solution of an improper integral
equation of ship wave resistance |
Author (s): |
Md. Salim Kamil and Mazlan Muslim |
Abstract: |
Ship
wave resistance had been a subject of continuous in depth study since
the late 1800. The pioneer work on ship wave resistance was by Michell
(1898) and followed by many studies thereafter. The ship wave equation
derived and used by Michell is an improper integral form. Wigley
(1926-1948) carried out further works extensively, improvised and solved
the Michell ship wave resistance equation theoretically and
experimentally using mathematical hull forms of thin ships. Wigley
solved the equation with the assumption that the integral is convergent
and errors in the remainders were appreciably negligible. Nevertheless
the tendency of the ship wave resistance becoming divergent is obvious
for hulls of larger angles of entrance. The objective of the paper is to
present a solution for a divergent or an improper integral equation of
ship wave resistance. The results matched closely with experimental
results and of better accuracy as compared with theoretical results
obtained from different methods performed by several other authors. This
method of solution would be practical and useful engineering tool for
the prediction of ship hull performance and optimization in terms of the
wave resistance and hence the total resistance with the ultimate aim for
application in ship powering estimates. |
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Title: |
Ultrasonic transducer attenuation behavior
of fiber glass composite laminates (FGCL) through signal filtering
approach |
Author (s): |
M. F. Mahmod, Elmi Abu Bakar and M. Z.
Mohamed Pauzi |
Abstract: |
In
ultrasonic non-destructive tests, transducer is one of the most part
need to determine carefully. The attenuation behavior of transducer
will impact overall ultrasonic measurement accuracy base on signal
processing analysis. In normal applications, ultrasonic inspector relies
on transducer calibration result produced by the manufacturer where
there are no doubts to question the accuracy of measurement results.
However, the attenuation behavior of transducer can be defined based on
signal-to-noise ratio (SNR) value. In this paper, the attenuation
behavior of ultrasonic transducer was investigated based on SNR value
through signal filtering approach. Since the detection of flaw in
composite laminates using ultrasonic non-destructive testing (NDT)
approach is highly complex due to noise occurrences, several types of
filter were applied and compared each other in order to propose the
suggested filter base on SNR result. A 2.25 MHz single crystal immersion
transducer is used to perform ultrasonic scanning for composite
laminates material which is thickness up to 7.4 mm with scanning rate
7.50 mm/sec under lab condition. As a comparison result, when applying
discrete wavelet transform (DWT) de-noising approach, SNR was enhanced
and caused defect detection was easily identified. |
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Title: |
Vision mobile robot system with color
optical sensor |
Author (s): |
Mohd. Daud bin Isa, Ahmad Rakimi bin
Mohammad and Muhammad Zubir Bin Mohd. Hanifah |
Abstract: |
A
basic design and configuration of Vision Mobile Robot System (VMRS)
using a camera with color optical sensor for FIRA event in RoboSot
challenge is presented. As a result, VMRS called Color Optic Sensor
Robot (COSBot) had been produced. A Pixy CMUCam5 with capabilities of
remember seven different color signatures, find hundreds of objects at
the same time, super-fast processing at 50 frames a second, and can
synchronous serial data used by microcontrollers for communicating with
quickly over short distances is adopted in this system as a color sensor
and main device used in this system. The other hardware and software of
the devices used in the VMRS are also explained. By carefully design and
configure the optical part and electrical part with adopting a simple
algorithm for color identification and image processing using C++
programming and Pixy Mon application software the COSBot realized with
relatively high accuracy and reasonable speed. The results show that
COSBot can be upgraded in term of model and material. Consequently it
can be used as part of the color vision in intelligent robots and it may
can be applied to color quality monitoring in many industrial fields
such services robotic application and others. |
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Title: |
Effects of post weld heat treatment on
hardness value of A36 carbon steel welded joints by Shielded Metal Arc
Welding |
Author (s): |
Puteri Zirwatul Nadila Megat Zamanhuri,
Norfadhlina Khalid and Ahmad Azfar Daud |
Abstract: |
This
study is conducted to assess the influence of post weld heat treatment
on hardness value. The purpose of this study is to measure and analyze
the hardness value before and after post weld heat treatment (PWHT) with
three different soaking temperatures and three ASTM A36 carbon steel
specimens. The specimen is welded by using Shielded Metal Arc Welding (SMAW)
process and the AWS E6013 electrode is used with welding current range
from 90A-100A. All the specimens were inspected using Ultrasonic Testing
(UT) before and after post weld heat treatment (PWHT) process. The
specimens in PWHT process were subjected to three different soaking
temperatures which are 490°C, 540°C, and 610°C. The Brinell hardness
testing process is the last process where the result is observed from
hardness value and it can be concluded that by decreasing the hardness
value of the welded structure, the brittle fracture risk and improve the
ductility will be minimized. |
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Title: |
Low velocity impact properties of
polypropylene (pp) honeycomb core sandwich structure with glass fiber
reinforced plastic (GFRP) laminated facesheet |
Author (s): |
Nurashikin Sawal, Muhammad Hanif Abd
Rahman, M. Sabri and Hazizan M. A. |
Abstract: |
The
low velocity impact response of thermoplastic honeycomb core from
polypropylene (PP) laminated with non-metallic facesheet made from glass
fiber reinforced plastic (GFRP) has been investigated by conducting drop
weight impact test characterize with different drop heights
displacement. Drop weight test was performed and average data was
collected for each specimen, which is also included maximum impact
force, impact energy, impact damage area, and time were evaluated and
compared. The experimental result found that the energy absorbing
effectiveness factor increases with the increasing of the impact energy.
Same goes to the increasing of the impact force, it were also increasing
the impact energy, respectively. A consequent damage was inspected
visually and obvious when the impact energy is high, the energy absorbed
by the specimen also high and hence, propagation of the impact damage
area was also increased. Therefore, the significant mark of indented
will be displayed clearly on the damage area mostly on upper facesheet. |
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Title: |
The effect of N550 carbon black in
polyester resin for fire-retardant application in marine composite
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Author (s): |
Asmawi A. M., Syarmela Allauldin,
Nurshahnawal Yaacob, Asmalina Saat, Azura Ahmad Radzi, Mohd. Zamani Ahmad
and Ahmad Faizal Ahmad Fuad |
Abstract: |
This
paper presents the experimental investigation on the influence of N550
carbon black (CBN550) series in polyester resin (wax and non –wax type).
The CBN550 was added into polyester resin at different weight
percentages with a curing agent. The investigation is mainly to study the
effect on fire retardance application in marine composite structure. The
fire-resistant structural composites samples of 1000 mm by 1000 mm
prepared which consist of 10 of composite mats layer in combination of
CSM 450 g/m² and Woven Roving 600 g/m². The carbon black (CB) volume
fraction range from/with 0% to 20% volume fractions. Optical observation
revealed the most suitable fraction of CBN550 in wax polyester resin is
at 10% and non-wax polyester resin is also at 10%. The fire resistance
behavior of this CBN550 - CSM 450 g/m² - Woven Roving 600 g/m² composite
(polyester wax) and polyester non wax was investigated by Fire Test
Procedure Code-Resolution A.653 [1]. Though smaller filler size
escalates the rheological behavior and values outstandingly at initial
reading compare to large particles but it slow down the curing
processdue to its small particle size, large surface area and high
dispersion rate. Experimental data showed the retardance level has been
increased up to 56.66% in non-wax type polyester resin (10%/CBN550) and
30.14% in wax polyester resin (10%/CBN550). The improvement in fire
resistance points are due to the presence of CBN550 which acts as a
positive additive in both polyester resin wax and non-wax. Filling
CBN550 in polyester resin also reduces the cost of the end products. The
preliminary results suggested that CBN550should attend to next level of
experiment investigation such as oxygen content, TG value,
microstructure as well as mechanical destructive test. The CBN550 could
be a suitable candidate for fire retardance application in marine
composite structure. In conclusion, crystallinity of polyester resin
increases with additional of CB particles. |
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Title: |
The development of subsystem of
accommodation to faults for dead reckoning system of autonomous
underwater vehicles |
Author (s): |
Vladimir Filaretov, Alexey Zhirabok,
Alexander Zuev and Alexander Procenko |
Abstract: |
This
paper is dedicated to developing of new method of synthesis of subsystem
of accommodation to continuous faults for dead reckoning system (DRS) of
autonomous underwater vehicles (AUV). Proposed method consists of three
basic stages. On the first step, the problem of detection and
localization of faults through the use of kinematic model of AUV and
special data fusion from its navigation sensors is solved. On the second
stage, the task of identification of fault values is solved by the
introduction of additional observers with feedback by residual signals.
In the third stage additional signals, compensating the faults are
formed in the respective control channels of AUV. The advantage of
proposed method is simplicity of realization and high precision of
compensation of the revealed faults in the conditions of uncertainty and
essential variability of parameters of environment. The results of
mathematical simulation is fully confirmed the efficiency and high
performance of the proposed method. |
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Title: |
Effect of aluminum
phosphate on mechanical and flame retardant properties of composites
fiberglass |
Author (s): |
Asmalina Mohamed Saat,
Asmawi Abd Malik, Adila Azmi, Mohamad Fadzil Abd Latif, Nur Ermadiana
Ramlee and Mohd. Rafie Johan |
Abstract: |
In marine industries
especially in fiberglass boat making, material selection is instrumental
for optimal product performance and economy. Mechanical properties of
laminated fiberglass composite containing polyester resin, fiberglass
and new fire retardant additive fabricated by Hand lay-up technique were
investigated. The fire retardancy mechanism and mechanical properties of
aluminum phosphate (AlPO4) were investigated in seven layers composite
fiberglass system. E-glass / Polyester composite of AlPO4 was prepared
with various different ratio of Aluminum Phosphates. Composite system
with addition of 5wt% AlPO4 observed maximum strength in tensile,
flexural and impact test. Fire retardant test also showed an optimized
performance in similar ratio. |
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Title: |
Carbonization CBN550 effect on tensile
properties of composite for marine structure application |
Author (s): |
Nurshahnawal Yaacob, Asmawi A. M., Asmalina
Saat, Ahmad Faizal Ahmad Fuad, Mohd. Zamani Ahmad and Azura Ahmad Radzi |
Abstract: |
The
composites have gained commercial success, where strength, stiffness,
durability and light weight are required as well as retardant capacity.
Improvement has been made such new series of resin such as vinyl ester
and epoxy type[1, 2]. However 95% of pleasure vessels and boats under 60
feet today are still made with polyester resin. The main consideration
for most composite builders is cost, with performance and more
importantly value for money often being a secondary consideration.
Therefore, this study investigate the tensile – mechanical effects of
mixing carbon black CBN550 with wax and non-wax type resin and
manufactured according to fiber orientation of [0o] and [90o]. The 10%
CBN550 exhibit highest reading for stress under [90o] fiber orientation
and the lowest reading when arranged at [0o] fiber orientation. The
preliminary study on CBN550 flammability has indicated the suitability
for this study to pursue in. The structural composites samples of 1000
mm by 1000 mm prepared which consist of 10 of composite mats layer in
combination of CSM 450 g/m² and Woven Roving 600 g/m². The carbon black
(CB) volume fraction range from/with 0% to 20% volume fractions. Optical
observation revealed the most suitable fraction of CBN550 in wax
polyester resin is at 10% and non-wax polyester resin is also at 10%.
The fire resistance behavior of this CBN550 - CSM 450 g/m² - Woven
Roving 600 g/m² composite (polyester wax) and polyester non wax was
investigated previously as per[3]. This results are in line with the
finding of the maximum load where the highest reading was recorded by
the 10%CBN550 specimen. This study showed that the introduction of
carbon black into the resin mixture helps reinforce the matrix
materials. The results suggested that CBN550 mixture should attend to
next level of experiment investigation such as oxygen content, TG value,
microstructure and other mechanical destructive test. The CBN550 could
be a suitable candidate for fire retardance application in marine
composite structure. |
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Title: |
Analysis of acoustic emission on surface
roughness during end milling |
Author (s): |
Nazrin Mokhtar, Intan Yasmin Ismail,
Mebrahitom Asmelash, Hafizi Zohari and Azmir Azhari |
Abstract: |
This
paper discusses the findings on the analysis of surface roughness with
the acoustic emission (AE) produced during end milling process.
Different
parameters were chosen for each experiment, namely cutting speed, feed
rate and depth of cut. All data collected from the AE sensor were
captured using AEWin software and later analyzed in MATLAB software.
Fast
Fourier Transform (FFT) method was used for data analysis to convert
time domain into frequency domain signal, allowing the RMS, amplitude
and frequency to be calculated. The results indicate that the most
influential parameter to the surface roughness are firstly feed
rate, followed by cutting speed, and finally depth of cut. It is found
that as cutting speed increases, the surface roughness decreases with a
higher amplitude of RMS signal. In case of increasing feed rate, the
surface roughness increases with a higher amplitude of RMS signal.
Lastly, increasing the depth of cut shows negligible effect towards the
surface roughness and amplitude of RMS. The result have shown that the
AE components responded effectively to the changes of occurrences in
milling process with respect to specimen’s surface roughness. |
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Title: |
Spray characteristics of a multi-circular
jet plate in an air-assisted atomizer using Schlieren photography |
Author (s): |
Shahrin Hisham Amirnordin, Amir Khalid,
Azwan Sapit, Bukhari Manshoor, Muhammad Firdaus Sahari and Mas Fawzi |
Abstract: |
This
study investigates the effects of a multi-circular jet plate on the
spray characteristics of an air-assisted atomizer in a burner system.
Schlieren photography is used to capture spray images, and different
parameters, such as spray tip penetration, spray angle, and spray area,
are analyzed. Three types of plates with different geometries and open
area ratios are studied at equivalence ratios of 0.5 to 0.9 (lean
condition) and 1.0 (stoichiometric condition). Results show that a high
fuel flow rate increases the spray penetration and spray area but
reduces the spray angle. Application of the multi-circular jet plate in
the burner system affects spray behavior and contributes to the
combustion performance and emission of the burner system. |
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Title: |
Investigation on resistance effects
through towing test and CFD analysis on catamaran boat hull form |
Author (s): |
Ridwan Saputra Nursal, Nor Isha Nordin,
Marzuki Mohammad, Mohd. Afandi Abd Hamid, Mohd. Naim Awang and Ahmad
Azrizal Mohd. Ariffin |
Abstract: |
In
recent years, high speed vessel received additional attention and being
developed intentionally for catamaran boat race, passenger vessel,
military vessel and recreational purposes. Most of hull forms used in
these high speed boat types is multi-hull. Whilst the twin hull type
vessel is the most popular among the multi-hulls because of their
inherent features such as large deck area, better stability, lower
wave-making resistance at high speeds and better safety. Since the
propulsive power of any marine vehicle depends mainly on its resistance
characteristics, it is required to predict the resistance of the vessel
either in theoretically, experimentally and numerical study. In the
present study, an attempt has been made to carry out both experimental
and numerical investigations on the resistance characteristics as well
as the comparison of an existing twin hull without tunnel used in
developed of human powered hydrofoil. This study is expected to minimize
the variation of resistance in range of 10% or les between both methods. |
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Title: |
Seawater fluid structure interaction
analysis through bearing liner structural modification approach |
Author (s): |
Saw C. L., Syed Amear S. A., Choong C. G.
and Shahril J. |
Abstract: |
Wide
replacement of oil lubrication for marine journal bearing to seawater
lubricated is to protect marine aquatic from rapid oil leak and
intentionally oil waste pollution. The cause of bearing liner and
propeller shaft wear and eroded are the low viscosity of seawater,
marine growth, seawater flow and start up friction that disrupt the
hydrodynamics film of lubricant. 3D journal bearing model has been
developed with 10, 15, 20 grooves liner structural modification and
inclusive of dimple instead of plain journal bearing. The Fluid
Structure Interaction simulation shows that 20 grooves liner with
dimples has the least deformation with von mises stress 717.37 Pa due to
lubrication by dimples lubricant. The more grooves and dimples shows
that more cooling effect by seawater flowing through the bearing by
reducing the friction wear and increase the hydrodynamic pressure.
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Title: |
Analysis on temperature setting for
extruding polylactic acid using open-source 3D printer |
Author (s): |
Nor Aiman Bin Sukindar, Mohd. Khairol Anuar
Bin Mohd. Ariffin, B. T. Hang Tuah Bin Baharudin, Che Nor Aiza Binti Jaafar
and Mohd. Idris Shah Bin Ismail |
Abstract: |
The
Rapid Prototyping (RP) technology has been developed since its original
introduction, leading to a significant improvement in the manufacture of
high-quality finished products. Fused deposition modeling (FDM) is a RP
technology that has been widely used because of the flexibility of the
FDM process. Despite the popularity of the FDM machines, cost remains a
major issue, motivating the development of low-cost open-source 3D
printing. However, the system and process of open-source 3D printing
needs to be investigated, particularly along the highly complex
liquefier; observation of the material flow inside the liquefier is
essential for this purpose. This paper examines the temperature
distribution of the liquefier and the flow behavior of the material
inside the liquefier using finite element analysis (FEA). The liquefier
temperature must be at 190°C because higher temperatures cause the
material to burn and lower temperatures may be detrimental for the
extrusion process. Therefore, this study focuses on identifying the
optimum printing temperature for the widely used polylactic acid (PLA)
filaments. A new cylindrical liquefier design has been proposed to
achieve a better heat distribution, and an optimum printing temperature
of 190°C (463.15K) has been suggested for extruding PLA material using
open-source 3D printing. |
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Title: |
Low-level processing approach using GUI
for ultrasonic C-scan defects determination of composite material |
Author (s): |
M. F. Mahmod, Elmi Abu Bakar, Raiminor
Ramzi and M. F. Zainal Abidin |
Abstract: |
Ultrasonic testing (UT) are the most common technique used for composite
laminated non-destructive (NDT) inspection. In the current practice, the
dependency of human interpretation during perform UT resulted in
inequality detection issues on inspection process step. This paper
presents an improvement of UT approach using graphical user interface
(GUI) to provide defect percentage of C-scan image. Several of composite
laminated C-scan defect image was identified before the defect
percentage being calculated. The intensity difference between defect and
non-defect image was calculated in this GUI. Base on this experimental
results shows that the result of defect calculation was reliable which
is proved by calibrated image. The different between an ideal and actual
defect calculation is 0.69 % are considered insignificant and
negligible. The average execution time for three test series is between
7.35 sec to 8.52 sec while the longest time is 9.52 sec. Since the
execution time is not exceed 10 sec and acceptable. Instead of
application, this GUI, however, able to operate only in offline and flat
surface condition. |
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Title: |
Development of model for controlling
Contract Change Order in pier project (Case Study in North Sulawesi,
Indonesia) |
Author (s): |
Estrellita Y. V. Waney, Mycle M. Wala and Harson Kapoh |
Abstract: |
This
paper focuses on the change in the work construction contract which is
commonly called work change order or Contract Change Order. This change
can alter the cost of the contract specifications and the project
schedule. The purposes of this study are to identify factors that cause
contract change order and to design a model for controlling contract
change order (CCO) in term of cost performance at the government pier
project implementation, particularly in North Sulawesi, Indonesia. The
study methods are primary data collection by running questionnaires and
secondary data from the office of the Department of Transportation and
contractor companies document. For designing an application model, the
methods used include waterfall method, architecture method, system
performance method and brainstorming by focus group discussion. The
dependent variable in this study is the Cost Performance (Y) and the
independent variables are Construction Factor (X1), Administrative
Factor (X2), and Resources Factor (X3). Statistical analysis results
showed that partially Construction Factor, Administration Factor and
Resources Factor significantly influence the cost performance.
Simultaneously, these three factors also significantly influence and
have a very strong positive correlation with the Cost Performance. The
application model developed for controlling CCO can present the
prediction of CCO by rating the percentage of CCO probability. Black-box
test method used for trial stage produces what is expected by presenting
the prediction percentage of 100%, 75%, 50%, 25% and not CCO. All
results displayed are designed flowchart. |
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