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ARPN Journal of Engineering and
Applied Sciences December 2018 | Vol. 13 No.
24 |
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Title: |
Rubber seed shells (Hevea Brasiliensis):
An adsorbent used for the removal of Rhodamine B dye |
Author (s): |
Rachel Yvonne Nadarajah, Rosmawani
Mohammad and Mardawani Mohamad |
Abstract: |
Rubber seed shells (RSS) are seemingly useless and rapidly becoming an
agricultural waste. As the industrial world is rapidly developing and
becoming technologically advanced in making products, the environment is
getting more polluted. The most polluted is the main source of water
supply. Waste water treatments are expensive. Rhodamine B (RB) dye is
used in all types of industries such as textile, leather, paint, paper,
plastics, and etc. Therefore, this project aims to reveal the use of RSS
(agricultural waste) as adsorbents for the removal of RB dye. The effect
of various parameters such as adsorbent size, adsorbent dosage, initial
dye concentration, contact time, and pH were studied. The study showed
that up to 99.52% of RB removal can be achieved under optimum conditions
(adsorbent size: 0.063 mm, adsorbent dosage: 3.0 g, initial dye
concentration: 100 mg/L, contact time: 24 hours and pH 3). The
experimental data were analysed with the Langmuir and Freundlich
adsorption isotherm models. The equilibrium data were best described in
the Langmuir model with a maximum adsorption capacity of 3.185 mg/g. In
conclusion, this study indicated that RSS have the potential to become
low-cost adsorbents for the removal of RB dye in waste water treatment. |
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Title: |
Optimal operation of renewable energy
irrigation system using particle swarm optimization |
Author (s): |
Ahmed Moubarak, Gaber El-Saady and El-Noby
A. Ibrahim |
Abstract: |
In
rural areas which are located far from the electrical grid, renewable
energy systems such as photovoltaic (PV) energy are investigated. The
most popular PV application is solar water pumping for irrigation. DC-DC
converter and maximum power point tracking are used because the PV
modules output varies widely due to varying weather conditions. The
water pump is driven by a three phase induction motor through a voltage
source inverter (VSI). However, the control of induction motor is known
to be difficult because it's highly non-linear and time variant. One
method to mitigate this is by using vector control techniques to control
the VSI as they offer a number of benefits including speed control and
regulation over a wide range and fast dynamic response. The proportional
- integral (PI) controller is most commonly used in the speed control
loop of vector control. This paper deals with the design of the speed PI
controller parameters (gains) using particle swarm optimization (PSO)
technique and compares it with the conventional Ziegler-Nichols (ZN)
method. Different objective functions have been proposed which are used
to evaluate the optimization algorithm. The optimum solution mainly
converges to a minimum error which affects the control parameters such
as the maximum overshoot, rise time and settling time of the system.
Simulation results are obtained using Matlab/Simulink program for
photovoltaic pump application during load variation (pump head and flow
rate variation). The results show the advantage of the PSO-based
optimization approach. |
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Title: |
Structural behavior of sustainable Hollow
Core Slabs reinforced with hybrid fibers |
Author (s): |
Zainab M. Hussein, Wasan Ismail Khalil and
Hisham Khalid Ahmed |
Abstract: |
Concrete Hollow Core Slabs (HCS) is one type of roofing that are widely
used in all the world in residential and industrial buildings due to,
the reduction of self-weight, and the economic and thermal insulation of
these building units. The recycling of waste from construction and
demolition of old buildings minimizes the environmental problems and
encourages sustainability. The aim of this study is to produce
sustainable HCS specimens reinforced with mono or hybrid (triple) fibers
of different types and dimensions and studying their structural
behavior. Fibers used include, hooked end steel fiber with aspect ratio
of 60 (type S1), micro-steel fiber with aspect ratio of 65 (type S), and
polypropylene fiber (PP) with aspect ratio of 667. Five hollow core
slabs (HCS) were casted including, three HCS specimens containing
crushed clay brick as coarse Lightweight Aggregate (LWA), the first one
is plain HCS specimen (without fibers), the second is HCS with mono
fiber (macro-steel fiber type S1 with volume fraction of 0.75%), and the
third is HCS specimens reinforced with triple hybrid fiber (0.25% steel
fiber type S1+ 0.25% polypropylene fiber + 0.25% steel fiber type S),
two HCS specimens with artificial LWA, one is plain HCS specimen
(without fibers) and the other is one HCS specimens reinforced with
triple hybrid fiber (0.25% steel fiber type S1+ 0.25% polypropylene
fiber + 0.25% steel fiber type S) were prepared. Load-deflection
relationship, first crack and ultimate loads, and ductility ratio of HCS
specimens were studied. Hollow core slab specimens reinforced with
fibers show considerable improvement in ductility ratio in ductility
ratio relative to plain specimens. The percentages of increase in
ductility ratio of HCS specimen containing crushed clay brick LWA
reinforced with mono steel fiber and specimen reinforced with triple
hybrid fiber are 297.4% and 351.3% respectively, while for HCS specimen
with artificial LWA reinforced with triple hybrid fiber is 386.5%
relative to the corresponding reference HCS specimen. Generally, the
experimental results indicate that HCS specimens containing produced LWA
have better properties than specimens containing crushed clay brick LWA.
Generally, the results indicate that sustainable HCS reinforced with
fibers can be used as roofing system in buildings. |
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Title: |
Kinetic study of Nano-Magnesium oxalate
precipitated from bittern |
Author (s): |
Hanem A. Sibak, Shadia A. El-Rafie,
Shakinaz A. El-Sherbini, Randa M. Osman, Marwa Said and Rania Ramadan |
Abstract: |
One
of the methods to prepare nano-crystals metal oxide (MgO) is by using a
precipitation method. Magnesium oxalate as a valuable chemical almost
produced in pure grade from seawater bittern by precipitation process.
In this paper, kinetics of magnesium oxalate precipitation from sea
bittern was studied. The rate constants determined at different
temperatures, Molar ratios and pH. The activation parameters were also
calculated. Sea bittern from salt production unit of El-Mex saline
company is containing about 85.7 g.L-1 Mg2+. Detailed characterization
involving XRD, TEM and TGA was investigated. The results show that The
precipitation of magnesium oxalate from sea bittern is first order with
respect to the concentration of magnesium oxalate at pH=4, MR=1:1 and
temp.=25°C Also, The rate constant doesn't strongly affected by
increasing temperature so the optimum operating reaction temperature is
25°C. The spherical Magnesium oxalate with uniform diameter of about 0.5
µm was obtained with purity higher than 98%. |
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Title: |
The effects of vortex shedding on the
aerodynamic performance of airfoils |
Author (s): |
Esther Rami Sikien, Aslam Abdullah, Mohd.
Fadhli Zulkafli and Mohammad Zulafif Rahim |
Abstract: |
This
is a comparative study involving various National Advisory Committee for
Aeronautics (NACA) airfoils NACA 0012, NACA 0024, NACA 4412 and NACA
4424. The numerical simulation involves the air flow passing these
models at high Reynolds number and various angles of attack. The study
focuses mainly on the aerodynamic performance as represented by lift and
drag coefficients. The Computational Fluid Dynamics simulation has been
carried out in order to understand the phenomena of vortex shedding. The
aim is to investigate the effects of vortex shedding on the aerodynamic
performance of airfoils which has still been widely discussed over the
years. The methodology has been validated; by using Spalart-Allmaras,
K-epsilon and inviscid models, the first with the turbulence intensity
and backflow of 0.10% contributed to relatively accurate result. The
outcome reveals that there are few aspects that need to be considered in
order to control or delay vortex shedding phenomena such as
thickness-to-chord ratio, airfoil types, Reynolds number and whether or
not it involves transient flow. |
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Title: |
Synthesis of palmitoyl-ethanolamide from
palmitic acid and monoethanolamine: Analysis of variance and surfactant
characteristics |
Author (s): |
Zuhrina Masyithah, Muhammad Ashari, Nur
Annisa, Erwin and Armansyah Ginting |
Abstract: |
Analysis of variance and characteristics of surfactant
palmitoyl-ethanolamide was observed in this study. Palm oil fraction,
palmitic acid (PA), is reacted with monoethanolamine (MEA) to produce
palmitoyl-ethanolamide using ZrCl4 catalyst and a mixed solvent of
isopropanol-hexane. The observed effect of substrate mole ratio
(1/6.6-1/13.4 PA/MEA), catalyst concentration (1.6-8.4 w/w PA) and
solvent ratio (0.32/1-3.7/1 v/w PA) to the conversion of palmitic acid
was arrange by Central Composite Design (CCD) and performed using
Response Surface Methodology (RSM). In the analysis of variance,
observed the assumptions of normality, homoscedasticity, and
independence to ensure the significance of the regression model that is
compiled. The results of analysis of variance indicate that the required
assumptions have been met and the regression model made is appropriate
and usable. The characteristic test of surfactant palmitoyl-ethanolamide
showed that the value of HLB palmitoyl-ethanolamide was 12.857 with the
decrease of the surface tension of 32.61 dyne/cm. |
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Title: |
Contribution of geostatistical analysis
for the assessment of RMR and geomechanical parameters |
Author (s): |
Amine Soufi, Lahcen Bahi, Latifa Ouadif |
Abstract: |
Geotechnical and engineering geology practitioners are always looking
out for tools which can help understand and reduce the large uncertainty
and variations in rock masses after complex geological processes.
Relying on traditional interpolation techniques for geotechnical
variables may lead to large uncertainty and major stability risk in the
mining phase. The present paper proposes a direct and indirect
methodology based on geostatistical estimation and simulation techniques
to determine the expected Rock Mass Rating (RMR) and its underlying
parameters, each geostatistical model identifies potential risk-prone
areas in which failures could be experienced, superposing the different
resulting maps allowed us to define low-risk conservative RMR model. A
total of 115 underground rock blocks samples from five mining openings
were examined for the rock mass quality using the RMR, Q and RMi
characterization systems. Cross-validation and jack-knifing techniques
showed that the proposed indirect estimation and simulation methods
outperformed the more frequently used direct approach and shows a more
accurate map with a low error coefficient which makes them adequate for
RMR modeling. The resulting map of the indirect approach allowed taking
into account the nonlinear nature, directional behavior of the RMR and
its constitutive parameters which can be used to assist engineers in
proposing suitable excavation techniques and an appropriate support
system. The developed model help to assess different geomechanical
parameters that can use to develop numerical models that explicitly
consider the rock mass heterogeneity. |
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Title: |
Cross-platform recognisation of unknown
identical users in multiple Social Media Networks |
Author (s): |
N. Naga Priyanka, N. Geetha and A. Viji
Amutha Mary |
Abstract: |
From
very recent past years have witnessed the requirement and evolution of a
vibrant research Crew on a large variation of online Social Media
Network (SMN) platforms. Recognizing anonymous, same yet identical users
among multiple SMNs is still a major problem. Clearly, saying that
cross-platform exploration may help solve too many problems in social
computing in both theory and applications. Up to now public profiles can
be duplicated and easily impersonated by users with different purposes,
most current user identification resolutions, which mainly focus on text
mining of users ‘public profiles, fragile. Some studies have attempted
to match users based on the location and timing of user content as well
as writing style. However, the locations are sparse in the majority of
SMNs, and writing style is difficult to discern from the short sentences
of leading SMNs such as, Sina Micro blog and Twitter. Moreover, up to
now online SMNs are quite symmetric, existing user identification
schemes based on network structure are not effective. The real-world
friend cycle is highly individual and virtually no two users share a
congruent friend cycle. So that, it is more accurate to use a friendship
structure to analyze cross-platform SMNs. Up to now anonymous users were
influenced to set up similar friendship structures in the different SMNs,
here they proposed the Friend Relationship-Based User Identification (FRUI)
algorithm. FRUI Algorithm calculates a match degree for all candidate
User Matched Pairs (UMPs) only, UMP with top ranks are considered as
identical users. We also developed two propositions to improve the
efficiency of the algorithm. The Results of these extensive experiments
demonstrate that FRUI performs much better than current network
structure-based algorithms. |
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Title: |
Chalcogenide semiconductor nanoparticles
embedded in polymer matrix: Critical approach |
Author (s): |
Manoj Kumar |
Abstract: |
Nanocomposites of polymer electrolyte are prepared by embedding cupper
sulfide or bismuth sulfide chalcogenide semiconductor particles in
polymer electrolyte (PEO:NH4ClO4). The process of preparation is
established by passing the hydrogen sulphide (H2S) through the polymer
complex (PEO:NH4ClO4+ x wt.% copper sulphate/bismuth nitrate). Total
conductivity is measured by semicircled cole-cole plots which indicated
one order of increase of bulk conductivity (10-6 S/cm to 10-5 S/cm) with
the dispersal of chalcogenide semiconductor particles (Bi2S3/CuS) in the
complex. Contribution of electronic conductivity or ionic conductivity
to the total conductivity is measured the Wagner’s polarisation plots.
SEM studies showed the non-uniform distribution of the chalcogenide
particles ranging from in the composites ranging from micro to nano
sizes, TEM studies showed chain type structure for the interconnected
(Bi2S3/CuS) dispersoid. The band gap of different colored composite
films are measured by optical absorption studies which showed change in
the band gap with change of size of dispersoid from micro to nano size. |
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Title: |
Indirect measurement of free-stream
turbulence level in wind tunnels |
Author (s): |
Ercan Erturk and Orhan Gokcol |
Abstract: |
In this
study we investigate the possibility of predicting the free stream
turbulence levels by an indirect measurement. The main motivation for
this is that in some wind tunnels direct hot wire measurements are not
possible and there is a need to measure the turbulence levels in these
wind tunnels. We constructed a flat-plate model with a 6:1 ellipse as a
leading edge and place it inside a wind tunnel. Inside the wind tunnel
the turbulence was produced by one of three different perforated grids,
with different holes and mesh sizes. The free-stream turbulence
conditions were documented for the three grids in terms of the total
r.m.s. and spectra of stream wise velocity fluctuations. The response of
the boundary layer near the leading edge was then measured through
wall-normal profiles of the mean and r.m.s. velocity fluctuations. We
find a linear input-output response of the Klebanoff mode amplitude with
the free-stream turbulence level. |
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Title: |
A review: Mechanism, materials and
properties of self-curing concrete |
Author (s): |
Ruhal Pervez Memon, Abdul Rahman Bin Mohd.
Sam, Abdullah Zawawi Awang, Ghasan Fahim Huseien and Uroosa Memon |
Abstract: |
Concrete is most widely used material in the construction industry, it
also needs a lot of water for its production, so it is an urgent need of
research to minimize the use water to produce concrete. This paper
review about the materials used as self-curing agents, mechanism of
self-curing and the properties of different type of concrete when
subjected to self-curing method. Self-curing technology is the process
which hydrate the cement internally in concrete, no external source
needed for curing such as water curing. Mostly concrete goes under
extensive self-desiccation, autogenous shrinkage and other properties of
concrete can be affected due to improper curing. Different researchers
have used different materials such as porous lightweight aggregates,
chemicals admixtures, polymers, natural fibers and pozzolanic as
self-curing agents in different ways, which have ability to withstand
high amount of water. Thesis self-curing agents used as replacement with
aggregates and used as infill material. Physical, mechanical, durability
and microstructure properties has been carried out by researchers to
evaluate the efficiency of self-curing in concrete. Results indicate
that by adopting self-curing process in concrete improve properties of
concrete. Most of self-curing research carried out in high-performance
concrete to solve the shrinkage problem due to low water cement ratio. |
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Title: |
Design and implementation of embedded true
parallelism jammer system using FPGA-SoC for low design complexity |
Author (s): |
Hussein Ibrahim and Muataz H. Salih |
Abstract: |
The
condition that drives a system to complete the processing of a number of
functions within a given amount of time is called the real-time system.
A projective missile system’s processing platforms face two major
issues: high cost and structural complexity. The system structure’s
complexity is a result of various reasons that include the mechanism
utilized in the system in order to perform the system functionality.
This mechanism can lead to delays in data processing because various
factors, such as the synchronisation of the system modules’ signals, the
processing unit’s architecture, and the unit’s computational power. In
order to lessen system complexity and system cost, true parallelism
mechanism is applied over the embedded system, along with a concurrent
structure. The FPGA platform (DE1-SoC) was used as the implementation
environment for this system. This led to an enriched implemented system
that had low costs. Furthermore, the system complexity is lessened since
the system uses a concurrent structure. Some of the modules that are
closely related to the system are implemented to support main processing
module. In this system, the signals covered were in four directions. The
total logic element was (5032) and total registers was (5180). The Phase
Locked Loop up to (1.6) GHz was manipulated in order to allow the system
cover a wide spectrum of signals with high accuracy of computing
process. Furthermore, the laser projective frequency jamming system is
capable of processing multiple frequencies at a time. The implementation
was able to obtain acceptable levels of throughput and it also lowered
the complexity. Furthermore, the structural design methodology also
makes it possible for the embedded concurrent computing architecture to
be scalable while the entire system grows. |
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Title: |
Effects of different dose of zeolite (clinoptilolite)
in improving water quality and growth performance of Red Hybrid Tilapia
(Oreochromis Niloticus) |
Author (s): |
Rabiatul Adawiyah Meor Mohamad Zain, Nur
Farrah IzzatyShaari, Mohamad Faiz Mohd Amin and Musfiroh Jani |
Abstract: |
The
optimum fish production is totally dependent on the physical, chemical
and biological qualities of water. Optimal water quality varies by
species and must be monitored to ensure fish growth and survival. The
effects of different dose of zeolite to improve the water quality and
growth performance of Red Hybrid Tilapia (Oreochromis Niloticus) were
investigated in the present study. Twenty tilapia fry were placed in an
aquarium with capacity of 30 liter of water. Natural zeolite (clinoptilolite)
with different dose of 0 (control), 5, 10, 15, 20 g/L added into the
water and the experiment was carried out in 60 days. The obtained result
showed that ammonia, nitrite, and nitrite levels were significantly
reduced in treated water compared with control. The lowest ammonia
levels recorded in 15 g/L treatment of zeolite, consistent with nitrite
and nitrate. However for total phosphorus and organic phosphorus
(orthophosphates), the lowest concentration obtained was from addition
of 10 g/L of zeolite. At the end of study, the growth performance of
fish treated with addition of 20 g/L and 15 g/L of zeolite were
significantly more compared to other groups. According to the results,
it showed that optimum growth of fish can be obtained with a good water
quality. In conclusion, the addition of zeolite is significant for the
improvement of water quality and growth performance of Red Hybrid
Tilapia (Oreochromisniloticus). |
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Title: |
A new method of location estimation for
fingerprinting localization technique of indoor positioning system |
Author (s): |
Rhowel Dellosa, Arnel Fajardo and Ruji
Medina |
Abstract: |
The
conventional way of finding the closest pair of points is the use of
brute force method that simply compute the distances of all pair of
points in the plane and find the points with the minimum distance. An
improved version of this method was the use of divide and conquer
algorithm. However, the expedition for improving the computational cost
of this problem continue to grow because of potential applications in
location estimation and sequence matching. This paper attempted to
develop and analyze a new method called closest coordinate scheme to
determine the estimated position for indoor positioning system. The
enhanced fingerprint localization technique was linked with the closest
coordinate scheme to test its value in terms of accuracy and efficiency.
Results showed that the closest coordinate scheme is efficient and
accurate. Future endeavor may focus on the time and space complexities
of closest coordinate scheme and find out similar applications. |
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Title: |
Shear strength assessment of
self-compacting concrete beams using lasso regression technique |
Author (s): |
Jack Banahene Osei, Oklu Joshua and Mark
Adom-Asamoah |
Abstract: |
Existing code provisions for shear strength prediction of
self-compacting concrete (SCC) beams have often fallen short of its
degree of predictability in relation to experimental responses. The
research study seeks to develop a model that better predicts the shear
capacity of self-compacted concrete beams without shear reinforcement.
In addition, the critical parameters that influence the shear strength
of an SCC beam was also investigated by using varying regression
techniques (Linear, Stepwise, Lasso, Ridge and Elastic Net regressions).
A pooled database having a total of 179 SCC beams without shear
reinforcement was compiled for the analysis. The Lasso regression was
the most effective from statistical analysis having the least relative
and mean squared errors. In comparison with existing codes: ACI 318-08,
AASHTOLRFD Bridge Design Specification-2007, Eurocode 2 and BS8110, the
Lasso model performed better with least mean percentage error (12.23%),
least average safety factor(1.1012) and the least coefficient of
variation(0.159). The Lasso model also showed that compressive strength,
height, breadth, depth of beam, shear span to depth ratio, longitudinal
reinforcement ratio, maximum aggregate size and fine to coarse aggregate
ratio were all relevant parameters in shear strength prediction of SCC
beams without stirrups. |
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Title: |
Calculation of absorption and emission of
thermal radiation by clouds cover |
Author (s): |
Zainab M. Abbood and Osama T. Al-Taai |
Abstract: |
A
clouds are one of the most principal elements in the energy balance
which are played a significant role in the absorption and emission of
thermal radiation. Data are taken by temperature, dew point, atmospheric
pressure and height from satellites recorded by the European Centre for
Medium- Range Weather Forecasts (ECMWF) for height (32-26509.7) meter
the levels of pressure (1000-20) hpa, the choice of the characteristic
day (12/2, 12/8, 12/14, 12/19, 12/22, 1/2, 1/8, 1/14, 1/19, 1/22, 2/2,
2/8, 2/14, 2/19, 2/22) of year 2016 over Baghdad station
(33.375°N-44.375°E). Otherwise, we have studied long-wave radiation
absorbed and emitted by clouds within certain wavelengths during hourly
mean 00-12 times and a cycle in temperature variation. So, classified
the clouds according to the cloud thickness and pressure levels as well
as we studied the relationship between the cloud water content and the
absorbance and relationship between the saturated vapor density and the
emissivity. The results showed that absorption and emission depend on
the cloud thickness, the cloud water content, saturated vapor density,
cloud location and wavelengths, where the higher clouds absorption lead
to clouds emission higher during hourly mean 00-12 time. |
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Title: |
Investigation of factors influence on post
web buckling of castellated beams with intermediates plate |
Author (s): |
Jaffar Ahmed Kadim |
Abstract: |
This
paper focuses with the investigation of the factors affecting the post
web buckling of castellated beams with intermediate plate in which the
analytical results of thirty castellated beams cases were summarized for
this purposes study. This research aims to find the effect of main
factors that controlled the buckling behavior of castellated beams.
These factors include the cutting angle (45°, 60°, 90°), the increment
plate height (0,50,100,150,200) mm, the element formulation (thin and
thick shell), and finally the loading conditions (shear force, bending
moment). The SAP 2000 software was applied to find the buckling load
factor by using four nodes shell element to represent the castellated
beam sections web and flange. The obtained results showed that the thick
element type formulation gave higher values by range 10% to 15%
according to the cutting angle and the ultimate buckling shear and
moment forces decrease with increasing the intermediate plate height by
a nonlinear amount so that the cutting angle 60 ° gives the higher shear
section shear capacity and values 90° gives higher section moment
capacity. Also, 12 regression models had been developed between the
reduction buckling section capacity and the intermediate plate height
ratio. In addition, the effect of the intermediate plate height changes
the mode of buckling failure from combined tee-web failure to web
portion. Finally, the plate height increases causing shifting down the
domain of interaction diagram of shear force and bending moment without
changing its shape. |
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Title: |
Tropical climate effect of hydrophobicity
and surface leakage current on electrical insulation materials (Silicone
Rubber and Fly Ash) |
Author (s): |
Salama Manjang, Ikhlas Kitta, Gassing,
Stephie Walukow Christiono and Riski Pratama |
Abstract: |
Based
on research conducted by I. Kitta, et al. (2016), it has been known that
the addition of fly ash filler in silicone rubber can increase the
dielectric and mechanical strength of the material. In this paper, we
are doing further study about the feasibility of the composite material
in terms of use in tropical climate. The purpose of this study is to
investigate the influence of tropical climate and high voltage on
changes in the contact angle and leakage current of composite silicone
rubber (silicone rubber and fly ash). The results obtained showed that
the largest decline in the contact angles occurred in silicone rubber
material that is not given filler fly ash, the smallest decrease in the
contact angle occurred in silicone rubber with high levels of fly ash as
much as 30%. In observation of surface leakage current similar things
happen, namely an increase in leakage current is highest in the silicone
rubber material without filler, with increased surface leakage current
is lowest at silicone rubber material with fly ash content of 30%. |
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Title: |
Study of strata movement based upon
developed Roof Fall Warning Index during final extractions in
underground coal mining under easily cavable roof formations |
Author (s): |
Jena S. K., Lokhande R. D., Pradhan M. and
Kumar N. |
Abstract: |
Roof
strata tend to have sagging effect due to gravity loading, in the zone
of extraction under bord and pillar underground coal mining with caving,
with subsequent development of mining induced stress which keeps on
increasing gradually with extractions. Such induced stress may influence
workings as dynamic loading effect, posing as a threat to stability of
working geometries. In general, when the cavable roof strata are
considerably weak in formations, such loading effect remains within the
goaved out area, resulting to a safer caving scenario. But, under such
situation, presence of any weaker working geometries nearby, such as rib
extraction zone, geologically disturbed places etc. may attract the
dynamic load to get released with possibilities of sudden premature
strata failures. The effective preventive measure for such adverse
situation is to go for proper study of strata movement to predict /
apprehend the peak limits, so that suitable control measures including
roof & side support actions may be actuated. This is a study for
analysis of strata behavior under weak roof formations during
depillaring with caving and predicting / apprehending the safe limits of
strata movement by working over the ‘Roof Fall Warning Index’, already
developed by the principal author. For the study, information were used
on different main falls from the depillaring panels of two different
underground coal mines with weak and easily cavable roof strata. |
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Title: |
Development of a real-time
microcomputer-based data acquisition system for a very low frequency (VLF)
monitor for space weather studies |
Author (s): |
April Jem H. Saccuan, Reynalin B. Deveza,
Shawn Michael L. Lamod, Jocelyn F. Villaverde and Ernest P. Macalalad |
Abstract: |
Ionosphere is the region in the atmosphere where ionization takes place.
Its structure varies by altitude, time, and other solar or cosmic
activities that affect the propagation of radio signals. Variations in
the signal strengths of very low frequency signals as a result of
ionospheric changes is a way to measure changes and disturbances in the
ionosphere. Stanford University developed a VLF based monitor called
SuperSID for monitoring changes within the ionosphere. In this project,
an enhanced version of the SuperSID software was introduced, which
includes a real-time visualization of signal strength versus time plot
for the current day; and a plot function for a quiet day curve. The
constructed microcomputer-based data acquisition system was validated
using another SuperSID monitor from Stanford. Both are stationed in
Manila, Philippines and are configured to monitor NWC (19.8 kHz) and NDT
(22.2 kHz) transmitters. A statistical test was performed to validate
the association between the monitors and resulted with an average
correlation coefficient of 0.958 and 0.948 for NWC and NDT transmitters.
Also, a successful characterization of solar flare and thunderstorm was
done using an enhancement algorithm. |
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Title: |
Current follower approach based PI and
fuzzy logic controllers for BLDC motor drive system fed from CUK
converter |
Author (s): |
N. Mohanraj and R. Sankaran |
Abstract: |
This
paper presents two controllers for implementing the current multiplier
approach over a wide range of speed control of a Brushless DC (BLDC)
Motor drive system as a cost effective low-power solution. A CUK
converter at the front end feeds the DC bus of the Voltage Source
Inverter (VSI), where, closed loop duty ratio control of the converter
results in variable DC bus voltage, enabling close matching of the
reference speed setting. Two alternate controller configurations viz. PI
controller and fuzzy controller are introduced for generating gate
trigger signals for the power MOSFET switch of the converter. Comparison
of performance covering a over a wide range of operating speed of the
entire system using PI/FUZZY controllers is carried out by simulation in
MATLAB/Simulink platform. |
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Title: |
Comparison of derived indices and
unsupervised classification for AL-Razaza Lake dehydration extent using
multi-temporal satellite data and remote sensing analysis |
Author (s): |
Hayder Dibs |
Abstract: |
Al-Razaza
Lake is one of the biggest lake in Iraq, and it is considered as a
sources of wealth of fish, and flood water retention. The lake suffered
from dehydration extent in during the last three decades. In this study;
we propose a method to monitor and detect the changes of AL-Razaza Lake
in the course of the time between 1992–2018 using time series of Land
sat satellite images. In this study different stages of processing and
analyzing, noise removal were performed. In doing so, the applicability
of different satellite derived indices including normalized difference
water index and normalized difference vegetation index were investigated
for the extraction of Lake surface water. An unsupervised (K-Means)
classification was applied. The results showed that AL-Razaza Lake has
been changed rapidly. Two noticeable results show the rapidly decreasing
in the Lake area using NDWIs and NDVIs by81.17%and 79.69% with area
about 1187.40km2and 1189.24 km2 respectively. Unfortunately all the
dehydration extended areas were replaced by soil, threat the
biodiversity and wildlife in this Lake, and left the Lake suffering more
for near future. |
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Title: |
Relevance of constant intensity
distribution to contouring reflecting plates with Intensity Integration
Technique |
Author (s): |
A. Vijaya and G. Subramanian |
Abstract: |
Intensity Integration Technique (IIT) is an image correlation technique
to contour mirror-like reflective surfaces. In the case of
one-dimensional surfaces, curvature at any point on it can be expressed
in terms of the ratio of reflected intensities from it from two (load,
unload) states of the surface. As a consequence, it is shown, that if
and when one of the reflected intensity distributions is uniform
(constant), the reflected intensity value of the other at every point
represents curvature to some scale. For now, as constant intensity
distributions are not feasible, a viable equivalent is proposed and the
hypothesis verified experimentally. |
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Title: |
Control of dissolved oxygen in water for
intensive tilapia culture using IoT |
Author (s): |
Jesus D. Quintero-Polanco, Martin D.
Bravo-Obando and Julian Molina-Mosquera |
Abstract: |
This
article presents the design of a prototype for the monitoring, recording
and control of the most representative physicochemical variables in fish
farming such as dissolved oxygen, temperature and pH in a tilapia
culture. This in order to optimize the living conditions of this fish
species and counteract the negative effects such as increased mortality
in the production process. For this, the system has a temperature sensor
DS18B20, a commercial sensor for pH measurement SEN0161 and a dissolved
oxygen detector of the company Atlas Scientific. These will be
responsible for obtaining the respective values in real time of each of
the physicochemical variables. The system also has a control stage
managed by a simple plate computer or commonly known as Raspberry Pi,
which fulfills the task of acquiring all the information. The prototype
also has a local application developed in Qt Designer whose objective is
to act as a graphical interface for the visualization and constant
monitoring of the measurements made by each of the sensors. Also it has
a server that stores and organizes remotely on a page web all the
information obtained so that the user has easy access and can monitor in
real time the tanks with tilapia. |
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Title: |
Optimization of the meteorological station
in the experimental farm of the Surcolombiana University |
Author (s): |
Ervin Aranda-Aranda, Diego F.
Sendoya-Losada and Jesus D. Quintero-Polanco |
Abstract: |
The
article presents the construction of an electronic system for the
experimental farm of the Surcolombiana University, which allows the
capture, transmission and processing of the following variables:
temperature, atmospheric pressure, relative humidity, soil moisture,
precipitation, radiation, speed and direction of the wind; in real time
regardless of the distance where the weather station is located, which
allows detailed access of all the variables through a web page (http://estacionusco.xyz/)
and which can be seen by anyone for the development of statistical
studies related to climate and new projects. The system is the basis for
making a mobile station in order to have global information in different
points or desired areas. |
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Title: |
A wide bandwidth element of solar
reflectarray antenna with scanning ability |
Author (s): |
A. Selamat, M. Ramli, N. Misran, M. F.
Mansor and S. H. Zaidi |
Abstract: |
A
simple solar cell integrated with a triangular loop shape element of
reflectarray antenna is presented in this paper. The triangular loop
shape element is varied in size to get the required phase range and
bandwidth. A wide bandwidth range over 15% has been achieved.
Furthermore, a 3 x 3 element reflectarray is then formed with 20°
scattering angle. A prototype of the solar reflectarray cell was
fabricated and measured. The measured results show good agreement with
simulation. The element is designed to be operated at Ku-band frequency
and formed a solar reflectarray antenna used for terrestrial
applications. |
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Title: |
An efficient FBMC based modulation for
future wireless communications |
Author (s): |
Kommabatla Mahender, Tipparti Anil Kumar
and K. S. Ramesh |
Abstract: |
This
paper proposes of implementing a diminished DFT (d-DFT) precoded Filter
bank multicarrier (FBMC). We develop an efficient precoding method using
d-DFT by combining with one-tap scaling. This technique has advantages
of both FBMC-Offset Quadrature amplitude modulation (OQAM) and Single
carrier Frequency division multiple accesses (SC-FDMA). Proposed
technique has same PAPR as SC-FDMA and has very low out-of-band
emissions and does not need cyclic-prefix. This method reduces latency
and complex orthogonality is restored at a considerable computational
complexity. A comparative performance is also evaluated between d-DFT-FBMC
and other multicarrier schemes and we observe that d-DFT is better than
other schemes. Simulation is performed by using Matlab. |
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Title: |
Quantification the effect of mangrove
coverage on the production of Red Snapper (Lutjanus malabaricus) in the
coastal area Central Java |
Author (s): |
Sri Puryono, Muhammad Zainuri, Suryanti
Suryanti, Rini Budi Hastuti and Sakina Rosellasari |
Abstract: |
Mangrove is an important ecosystem which supports fish resources
diversity and abundance. However, it’s impact on the economically
important fish such as Red Snapper is not well understood. This research
aimed to study the fluctuation of Red Snapper yields, study the dynamic
of mangrove coverage and its condition, and analyze the effect of
mangrove dynamic to the yield of red snapper in the northern coastal
area of Central Java. The research was conducted from November 2017 to
February 2018, while the northern coastal area of central java was
selected as the area of interest. Data collection was conducted by
literature study in the Fisheries and Marine Services of Central Java to
obtain data of mangrove condition (good, moderate, poor) and coverage
and catch of Red Snapper. The primary data utilized in this research
were obtained from the Statistics Book of Marine, Coastal and Small
Islands and the Statistic Book of Capture Fisheries between 2009 and
2016. Data analysis was conducted by regression through weighting of
mangrove condition. The result showed that the yield of Red Snapper was
fluctuated ranging from 508.5 tons to 4,242.9 tons. There were also
fluctuations on the mangrove coverage's based on its conditions ranging
from 9,844.8 to 12,877.0 ha. Regression analysis showed that weighted
mangrove coverage has significant negative impact on the yield of Red
Snapper in the northern coastal area of Central Java. The best estimator
for the relationship was power regression model, with the equation ln(y)
= 4.08.e40 - 9.58.ln(x) and determination coefficient of 61.3%. |
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Title: |
DFT study on electronic structure and band
decomposed charge density of the small rings zigzag boron nitride
nanotubes |
Author (s): |
Riri Jonuarti, Triati Dewi Kencana Wungu,
Freddy Haryanto and Suprijadi |
Abstract: |
The
small ring zigzag boron nitride nanotubes (BNNTs) which have a diameter
less than 1 nm, possess the different characteristics from other BNNTs
that make the small rings zigzag BNNTs are an interesting topic to be
investigated. So that, in this study, we report the electronic structure
of zigzag BNNTs consisted the stability and the band structure of zigzag
forms under various chirality. We also verify the band decomposed charge
density around the Fermi level to visualize the partially occupied
valence bands and unoccupied conduction bands. The local density
approximation (LDA) within the density functional theory (DFT) has been
applied in our calculations. We find that the stability of nanotubes
will increase as the diameter increases. We found that the increasing
integer of n in chiral vectors for zigzag (n, 0) will increase the
zigzag BNNTs band gap. The band decomposed charge density depicts that
valence maximum band (VMB) is mainly located at the nitrogen atoms.
While, conduction minimum band (CMB) is uniformly located at nitrogen
and boron atoms. The band decomposed charge density also shows an
overlapping occurred inside nanotube. The results confirm that a BNNT
narrow band gap can be generated by the small rings zigzag form. |
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Title: |
Damage detection using Laplacian operator
on interpolated mode shape curvature |
Author (s): |
Fawazi N., Hasrizam C. M. and Hafiz Amran |
Abstract: |
In
this paper, a mode shape curvature based damage detection algorithm for
estimating damage location in a beam is presented. The computational
modal analysis is used to obtain the natural frequencies and the mode
shapes for both undamaged and damaged structure. The Laplacian
difference equation is used to estimate the difference of the calculated
mode shapes. Considering the limited number of possible measured points
during the modal analysis, Akima’s interpolation is used. This is to
estimate the mode shape displacements at the unmeasured positions which
are a challenging problem for crack detection using mode shape data. The
Gaussian wavelet for one-dimensional problem is used in this study which
leads to a clear visualization of the position of the damaged structure.
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Title: |
Aes-Present: A new secure Iot-based scheme
for telemedicine and E-health systems |
Author (s): |
Abdellaoui Abderrahim, Fdili Ibtissam,
Chaoui Habiba, El Achgar Hicham and Hmina Nabil |
Abstract: |
Over
the last few years, the Internet of things has gained more and more
space in various activities sectors, including the health sector. In
fact, the Telemedicine has benefited from this new concept by using its
various kinds of special devices and tools which facilitate to provide
distance healthcare services, and thus, solve many problems notably for
the elderly or person in remote areas. However, the transfer of
sensitive medical data is threatened by falsification, while its
security and privacy are crucial in healthcare. The main contribution of
this paper is to propose a secure telemedicine scheme that supports
different types of medical data. The scheme ensures, on the one hand,
communication confidentiality by means of a combination between
heavyweight and lightweight cryptography, and on the other hand, data
integrity by using network steganography and the cryptographic hash
function RIPMD160. |
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Title: |
The performance of power control method on
macrocell-femtocell LTE heterogeneous
networks |
Author (s): |
Azita Laily Yusof, Nurnasihah Md Wazali,
Norsuzila Ya’acob and Darmawaty Mohd Ali |
Abstract: |
In
telecommunications, femtocell technology has been introduced to improve
indoor coverage and capacity. Femtocell is a small, low-power cellular
base station deployed to offer better good services with low cost as it
reduces the transmitted power. It is also designed to offload the
traffic in macrocell to the femtocell network. However, the unplanned
deployment of femtocells and their uncoordinated operations may result
severe interference conditions among the femtocells and between
macrocells and femtocells. In this paper, power control techniques has
been proposed at the base stations to mitigate interference and increase
the network capacity. Power control equation is applied at the base
stations for both outdoor macrocell users and indoor femtocell users,
and a framework is developed by using the MATLAB software to analyze the
signal performance. From the results obtained, this proposed technique
has increased number of successful handover and hence, can effectively
eliminates co-channel interferences between macrocells and and
femtocells in urban and busy area. |
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Title: |
Improvement of bus voltages and line
losses in power system network through the placement of capacitor and DG
using PSO |
Author (s): |
Naji Eltawil, Meysam Shamshiri, Marizan
Sulaiman, Zulkiflie Bin Ibrahim and Noor Ropidah |
Abstract: |
The
optimum allocation of capacitor banks and Distributed Generation (DG)
units are one of the challenges of power network planner and operators
in transmission and distribution levels. Capacitors and DG are
compensators that can help to power network to reduce the total power
losses and improve the voltage profile, but non-optimal allocation of
compensators can lead to inverse power flow. This can be caused to raise
the voltage at busses out of the statutory limits as well as increasing
the system losses due to reverse power flow. The capacitors in power
system are generally utilized to supply real reactive power for reducing
real power, then as the results improving the voltage profile.
Therefore, the appropriate placement and sizing of capacitors are
essential to ensure that system can mitigate power loss and improve the
voltage profile with respect to all the technical constraints and limits
which takes into account as penalty factor and added the objective
function of optimum allocation of DG and capacitors. To minimize the
obtained objective function, this paper hasutilized Particle Swarm
Optimization (PSO) technique to find the optimum location and the size
of the units to ensure that can achieve minimum power losses and bets
voltage profile. The OpenDSS engine is utilized for performing power
flow calculation in an iterative manner for PSO algorithm. The IEEE 14
bus system has been used as a case study in this paper for executing the
proposed method and finding the optimum solution for DG and capacitor
allocation. The results of this paper show that proposed method was
successful to achieve the target of the objective function and allocate
the DG and capacitors into the best optimum location with appropriate
size. This paper highlighted that how the existing power network can be
improved to be functional in future long-term load growth without the
huge investments of the network reinforcement. The results show that by
allocating the DG units and capacitors the existing network can supply
the good power quality to the end receiving buses, even with a better
voltage profile and less total power losses in the overall network. |
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Title: |
Evaluation of thermal phase shift from the
curve of temperature of a kapok-platter material in dynamic frequential
regime |
Author (s): |
Dame Diao, M. S. Ould Brahim, Hawa Ly
Diallo, Youssou Traore, Pape Touty Traore, Seydou Faye, Issa Diagne and
Gregoire Sissoko |
Abstract: |
In
this article, we study the thermal phase shift of a thermal insulating
material based on kapok-plaster in dynamic frequency regime. The method
of determining this phase shift consists in evaluating the delay of the
signal of the temperature between the front and rear faces of the
material for a given excitation pulse as a function of time. The study
of the influence of the pulse is also evaluated. |
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Title: |
Arduino utilized for dynamic automatic
security locker system |
Author (s): |
Bahaa Hussein Taher, Muhanad Mohammed
Kadum and Mohammed Abdulraheem Fadhel |
Abstract: |
Benefit Due to the pressing demand for the safe storage in public areas,
Increase the number of people applying these services in substantial
life, such as the Holy shrines, Institutions, Airports and building
office, In view of the traditional methods of the lockers to save a
package, which relies on regular keys that can be stolen or lost, the
higher cost is also used specifically for one user only, This work to
solve problems from regular keys and gives a dynamically works multiple
usages at the different times, includes electronic locks depends on, a
password that create by a user with a lower cost, flexible and easiness,
the idea of splitting the password into two parts gives a strong
protection in this application, the simulation using some of the
electronic parts of the Arduino device to design a dynamic automated
digital security system to Apply for Multi cabinet’s lockers. It can
accept multi-users each period of time while there are some of the
cabinets are empty, The cabinet will only unlock if the password
matches, and will be erased from the memory automatically to use again;
otherwise, the alarm is on. |
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Title: |
IA-FEC: Interleaved adaptive forward error
correction scheme with efficient packet loss recovery system in cloud
computing |
Author (s): |
Benjamin Franklin I. and Ravi T. N. |
Abstract: |
Cloud
computing plays an important role in next generation of business
enterprises. In traditional method of IT services maintained their data
under suitable physical, logical and personnel controls, but in cloud
computing large data centers consisting application software and
databases, where the organizational data and services may not be fully
reliable. This paper focuses on data storage security against packet
loss which is most important quality of services for the cloud users.
Some existing techniques have been introduced in recent years against
packet loss either by associate with retransmission request my cloud
users or adding redundant Forward Error Correction (FEC) data. This
paper proposes an efficient data encoding method of Interleaving
Adaptive-FEC (IA-FEC) method for time sensitivity of data recovery named
as Interleaving-A-FEC has been introduced. By use of interleaving
technique, the opportunity to recover lost packets can be much improved
due to the interleaving characteristics to separate the effect of packet
losses. Adaptive–FEC (A-FEC) has the advantages of high redundancy rate
with respect to the packet loss, based on the request messages received
from the cloud users. This method combined both the advantage of A-FEC
and interleaving techniques. The simulation results demonstrate that the
proposed IA-FEC method has produced higher recovery rate than
traditional FEC method, which is widely being used for internet phone
services. The proposed approaches will be more suitable for bursty
packet losses with various loss environments. |
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Title: |
A critical survey on approximate computing
with CMOS and memristors |
Author (s): |
S. Muthulakshmi, A. Sivasubramanian and S.
R. S. Prabaharan |
Abstract: |
In
the nanoscale era, enhancing the performance of digital circuits and
systems becomes increasingly cumbersome. As a result, computing becomes
increasingly heavy with multimedia processing. Approximate computing is
regarded as one of the emerging technologies that could produce
less-than-optimal results which are sufficient enough in user’s
perspective. This is accomplished by minimizing energy consumption as
well as hardware area. The slight compromise in output quality is
acceptable for inherent error resilient applications. This paper reviews
different types of existing CMOS based approximate circuits designed by
various functional approximation techniques. Further, this survey
focuses on analyzing the existing approximate arithmetic circuits based
on various error metrics such as error rate, error distance, mean error
distance, normalized error distance, and minimum acceptable accuracy.
The impact of approximation on circuit characteristics for instance,
delay, power consumption and throughput are also presented. This paper
critically reviews the progress made in the context of approximate
computing by using CMOS architecture and its impact on replacing with
RRAMs (Memristor). The latter is reportedly found to be energy efficient
due to its nano-scale dimension. Although memristor based approximation
is still in its infancy, it is high time to understand its emerging
importance in nanoscale computing in general and approximate computing
in particular. |
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Title: |
E-congkak: The development of an
electronic congkak board game to promote traditional board game to
younger Malaysian generation |
Author (s): |
Amir Faqihuddin Hafizan, Amar Faiz Zainal
Abidin, Nik Zulfiqar Nik Suhaimi, Muhammad Muzamil Mustam, Firdaus
Sukarman, Kamaru Adzha Kadiran, Siti Aliyah Saleh and Rozi Rifin |
Abstract: |
Congkak board game has been a traditional board game played among
Malaysian. Unfortunately, like any other traditional games, there is a
great decline of interest among younger Malaysia generation due to
popularity of multimedia-based games. The objective of this project is
to improvise the traditional board game by developing an electronic
based board game that gives the interactive element that most
multimedia-based games, yet keep the traditional kinesthetic and human
to human element. The project uses Arduino Mega as controller, seven
segment displays to indicates number of marbles in each hole, and push
button for the user to select which hole to select. A survey consists of
six questions was done among the young Malaysians to verify whether the
electronic board game is better than the traditional board game. The
result indicates that the electronic board game proved to be popular
among the young generation. |
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Title: |
A hybrid framework for brain TUMOR
detection and classification using neural network |
Author (s): |
Shijin Kumar P. S. and Sudhan M. B. |
Abstract: |
Magnetic Resonance Imaging (MRI) has been a robust tool for the
diagnosis of brain tumors. MRI is an imaging technique that provides
detailed information about brain anatomy. This paper announces a novel
method for efficient and accurate MRI analysis. The images are
pre-processed to increase the contrast and to remove the skull region. A
novel algorithm is used to check whether the given image is normal or
not. This algorithm reduces the computational complexity and increase
the speed of proposed classification system by selecting abnormal images
alone for further processing. Segmentation is performed on abnormal
images to find the tumor region. Segmentation is based on a hybrid
algorithm using K-means clustering and Texture Pattern Matrix. Texture
Features and shape features are separately extracted from the segmented
binary image using Gray Level Co-occurrence Matrix (GLCM) and connected
regions. The features thus obtained are used to train the neural network
using Back Propagation Algorithm defined by Levenberg-Marquardt (LM)
algorithm. Feed Forward Neural Network (FFNN) is used for the
classification of MR images. While using the proposed method, accuracy
is 98.06%, specificity is 97.77% and sensitivity is 98.34%. Speed,
Robustness and computational complexity are the major advantages of the
proposed system. |
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Title: |
New design for dynamic pressure
calibration system |
Author (s): |
Shaker A. Gelany, T. A. Osman, A. M.
Abouel-Fotouh, Alaaeldin A. Eltawil and Bassam A. Hussein |
Abstract: |
Dynamic pressure sensors calibration and their traceability is a new
metrology field. Since such dynamic measurements are essential in the
design and development of modern engines, and many industrial
applications. It is necessary to establish national Egyptian standard
for dynamic pressure measurements which can provide traceability to the
industry. This paper presents a new design for dynamic pressure
calibration machine. The main idea of this machine depends on generating
an impulse pressure signal applied to both the sensors under calibration
and a reference sensor. The machine is fully automated using LabVIEW
software; the machine linearity and the repeatability are tested. |
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Title: |
Hydrate: Real menace to flow assurance |
Author (s): |
Anyadiegwu Charley Iyke C., Ohia N. P. and
Muonagor Chukwuemeka M. |
Abstract: |
The
effect of hydrate formation on flow was evaluated. Orifice Flow equation
was applied to compute the flow rates of Gas Stream A through the
orifice before hydrate formation and after hydrate formation. From the
computations and Figure-3.1, it is seen that hydrate formation reduces
the amount of flow through the orifice. The flow rate through the
orifice before hydrate formation was 2465829.4scf/hr but after hydrate
of about 2.25’’ thickness was formed the flow rate reduced to
668146.4scf/hr. Also, from Figure-3.1, as the thickness of the hydrate
increases, the flow rate of gas through the orifice decreases. |
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Title: |
Synthesis of NI(II)-TI(IV) layered double
hydroxides using coprecipitation at high supersaturation method |
Author (s): |
Solovov V. A., Nikolenko
N. V., Kovalenko V. L., Kotok V. A., Burkov A.?.4, Kondrat’ev D. A.,
Chernova O. V. and Zhukovin S. V. |
Abstract: |
The
aim of the work was to prepare Ni(II)-Ti(IV) layered double hydroxides
using coprecipitation at high supersaturation method, which has not been
reported yet. The samples were prepared using coprecipitation at high
supersaturation, by adding mixed salt (Ni2++Ti4+) solution to
NaOH+Na2CO3 solution. The prepared samples were characterized using
X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM),
Thermogravimetric analysis(TG) and Differential Scanning Calorimetry.
The results of XRD analysis has confirmed that prepared samples have
hydrotalcite-like structure, isomorphous to a-Ni(OH)2. Separate titanium
oxide or hydroxide phase was not observed. The influence of synthesis
temperature and hydrothermal treatment on phase composition, morphology,
and thermal stability has been studied using TG, DSC, and SEM. It has
been established that elevated synthesis temperature and hydrothermal
affect crystallinity, thermal stability and morphology, but no effect on
phase composition was observed. A formation mechanism of Ni(II)-Ti(IV)
layered double hydroxide during coprecipitation at high supersaturation
have been proposed. |
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Title: |
Methods of ECG-Signal transmission system
development |
Author (s): |
Viktor Ivel, Yuliya Gerasimova, Sayat
Moldakhmetov and Pavel Petrov |
Abstract: |
The
article concerns the concept of medical cardiodiagnostical automated
systems based on wireless technologies, Matlab application package and
ECS PhysioBank ATM database. This article considers the principles of
Holter monitoring systems to be used at home. It describes the methods
of application of electrocardiographic signals archive for debugging and
setting up of the system developed. The undertaken study showed that the
proposed methods shall create effective systems of daily cardiac
activity monitoring characterized by high speed and low energy
consumption. |
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Title: |
Prosthetic hand control using wearable
gesture armband based on surface electromyography |
Author (s): |
Abd Al-Sahib N. Kadhim, Muhammed
Abdulsattar and Abu shanah R. Waleed |
Abstract: |
Surface electromyography is a technology that provides detection of
electrical activity produced by the physiological contractions of
muscles; the sEMG is widely applied in medical assistive applications
such as gesture control for upper limb prosthetics. Nowadays, there are
many useful devices for innovative and new medical technologies in
health care. Myo armband is an example for these devices which can be
used for many applications in computer, mobiles and gaming system. In
this paper the control of prosthetic hand of 3DOF in each finger via
wearable MYO armband communicates wireless with the Arduino
microcontroller via Bluetooth piece. The MYO armband has eight
electromyography (EMG) sensors for collecting bioelectric signals from
different parts of the forearm muscle; Myo armband is a wearable gesture
and motion control device that uses a set of electromyography sensors,
combined with a gyroscope, accelerometer and magnetometer to detect
movements and gestures, the test was done on a healthy person and an
amputee person .In this work another sensor was used the FSR sensor to
make the prosthetic hand smart when touching specific object this
feature made the prosthetic hand intelligent. |
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Title: |
Risks response failure in construction
projects |
Author (s): |
Hafeth I. Naji, Ehsan Ali Al-Zubaidi and
Rouwaida Hussein Ali |
Abstract: |
This
paper aims to identify the risk response failure in a construction
project in the periods in the periods between 2006 t0 2013 and identify
the techniques that use to predict the failure in the construction
projects in the periods of 2014 to 2016 and select the technique with
high accuracy. The methodology of the paper include two part,
questionnaire and the use of data mining techniques. The questionnaire
was distributed to the owners, the contractor and other parties involved
in the project, 41 projects were taken and the questionnaire was
distributed to 15 people who work in the project. The questionnaire
includes the strategies for each risk and five measurements were used
which are too low, low, medium, high and too high The second stage
include the use of data mining techniques which are decision tree,
neural network and support vector machine ,the period from 2006-2013 as
training set to predict the failure of 2014-2016 projects. The program
that use is KNIME (pronounced /naIm/), the Konstanz
Information Miner, is data analytics with an open source, reporting and
integration platform. All the project face failure in construction
projects, at this stage doesn't receive much attention in the projects
that lead to the failure. The decision tree shows the highest accuracy
and that because it considers the
best algorithm in prediction of nominal class. This study is the only
one made in identifying the risk response failure in construction
projects First, we have identified the risk in the construction project
in different periods, the identified the risk response for each risk,
finally we determine the risk response failure in construction projects. |
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Title: |
Effect of evaporation time on physical and
chemical properties of aloe vera gel extract (Aloe Chinensis Baker) |
Author (s): |
Tri Yuni Hendrawati, Ratri Ariatmi
Nugrahani, Suratmin Utomo and Anwar Ilmar Ramadhan |
Abstract: |
Aloe
vera gel can be used as raw material for medicine and pharmaceutical
preparations by reducing the water content. By reducing the water
content is expected to increase the levels of beneficial substances.
Evaporation used is vacuum evaporator with maximum temperature 60oC. The
purpose of this research is to estimate the time of evaporation to the
properties of the Aloe vera extract gel. Evaporation of Aloe vera gel is
done at 60oC and pressure 72 mbar. Evaporation time is varied at 30, 60,
90 and 120 minutes. At each evaporation time pH, density, refractive
index and vitamin C. Vitamin C analysis using HPLC method with ascorbic
acid standard. In the pH test, pH ranges from 4.5 to 4.3 at 120 minutes.
The refractive index increases because of the longer evaporation time
the higher the viscosity and the color closer to the yellow green. The
density values ranged from 0.945 g / ml at 30 minutes and 1.0056 g / ml
at 120 minutes. For the best vitamin C levels obtained at evaporation
time of 120 minutes at 4.1 ppm. In this evaporation condition means
vitamin C can be maintained. |
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Title: |
Using a statistic approach: An application
for assessing concentrations of air pollutants |
Author (s): |
Souad Laaroussi, Taoufik Cherradi, Soulhi
Aziz and Rabiae Saidi |
Abstract: |
In
today's cities management, the primary challenges facing local
decision-makers are climate change, population growth, pollution and the
rising costs of energy. It must be noted that air pollution is one of
the most complex ecological problems that the aformationed
decision-makers have to deal with nowadays. Given the limited financial
means of most municipalities, the primary objective of this paper is to
provide a less costly decision support model for the assessment of air
pollutant concentrations, particularly SO2. The Six Sigma approach, in
its "analysis" section, allows the evaluation of the daily average of
SO2 concentrations measured during the period of one year in the city of
Kenitra / Morocco. The application of statistical tests helps assess the
conformity of this pollutant with the value limit required by the
Moroccan standards for the protection of the environment. |
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Title: |
A systematic mapping study of high
performance computing and the Cloud |
Author (s): |
Isaac Odun-Ayo, Rowland Goddy-Worlu,
Olasupo O. Ajayi and Emanuel Grant |
Abstract: |
Cloud
computing is a paradigm that provides resources in an almost limitless
way to users. High Performance Computing (HPC) involves performing
computationally intense processes rapidly. Cloud computing being
scalable and comparatively cheaper has the capacity to offer such
processing speed, hence HPC are often deployed in the Cloud. However,
determining a focus of research in a particular field of study is
sometimes challenging especially in the area of HPC and the cloud. A
systematic mapping study examines the various research work carried out
in given area, summarizes these work and provides a visual
representation of the results in form of maps. The method utilized in
this study involved analysis on three categories namely, topics,
research and contribution facets. Topics were extracted from primary
studies, while research type such as evaluation and contribution such as
tool were utilized in the analysis. The objective of this paper
therefore was to conduct a systematic mapping study of HPC and the
Cloud. The results showed that there were more publications in terms of
performances in the aspect of metric with 2.88%, and more publications
on applications relating to tool, model and method with 26.73%, 18.27%
and 12.5% respectively. Furthermore, there were more publications on
optimization in terms of process with 5.77%. In addition, there were
more articles on applications based on evaluation and validation
research with 18.1% and 6.9% respectively. Publications on optimization
in terms of solution research accounted for 6.9%, while articles on
design and implementation that relates to philosophical research were
3.45%. The outcome of this study identified several gaps that will be of
benefit to researchers, practitioners and providers. |
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Title: |
Byte-invert transmission for flicker
prevention and illumination control for visible light communication |
Author (s): |
Seong-Ho Lee |
Abstract: |
In
this paper, we introduce a new method, byte-invert transmission, for
preventing LED flicker and controlling illumination in visible light
communication (VLC). In byte-invert transmission, each data byte is sent
in sequence with its inverted version. The inverted byte is an eight-bit
data whose bits have been changed to the opposite state of their
original value. In this configuration, the average power of the LED
light is kept constant regardless of data change, keeping it
flicker-free, and the illumination is controlled by changing the duty
factor of the return-to-zero (RZ) data waveform. In experiments, the LED
optical power was varied from 4.5% to 45% of its DC value by changing
the duty factor from 10% to 100%. |
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Title: |
Preparation bio-lubricant from Catfish fat |
Author (s): |
Hong Thi Tran, Phuoc Vinh Truong and Tan
Minh Phan |
Abstract: |
Catfish fat treated to refined Catfish oil (RCfO) by degum, dewax and
neutralize. Catfish fat was chemical conversion to ester Catfish oil (ECfO)
for the purpose of enhancing the oxidation stability of Catfish fat.
Blending bio-lubricant from ECfO and RCfO was constructed base on the
20W-50 engine lubricants formula, replacing mineral base oil asmixture
of ECfO and RCfO. The characteristics of material and products were
determined by TCVN standard and ASTM standard. Thermo gravimetric
analysis (TGA) measurements and Rancimat test were used in determination
the oxidation resistance. The biodegradability of samples was analyzed
by COD test and BOD test. From the analysis results show that, ECfO and
RCfO can used as biobase oil. Blend of ECfO and RCfO in ratio (wt/wt)
75/25was not only able to meet the characteristics of 20W-50 engine
lubricant but also high biodegradability. The preparation of
bio-lubricant from Catfish fat can develop sustainably because of using
alternative materials and environmentally friendly products. |
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Title: |
Mathematical model of the viscous fluid
motion caused by the oscillation of a flat porous surface |
Author (s): |
Nikolay Grigoryevich Taktarov, Olga
Aleksandrovna Runova and Nadezhda Aleksandrovna Khramova |
Abstract: |
This
paper proposes and studies a mathematical model of the motion of a
viscous fluid caused by the oscillation of a plane porous surface. The
motion of liquid inside and outside of a porous medium is considered in
a fixed coordinate system. The porous medium performs harmonic
translational-oscillatory motion parallel to an impenetrable flat
surface, which limits the porous medium from below and moves with its
velocity. Exact analytical solutions of the nonstationary Brinkman
equation describing the motion of a liquid in a porous medium and the
Navier-Stokes equation describing the motion of a liquid outside of a
porous medium are found. A numerical analysis of the proposed
mathematical model is carried out. The profiles of filtration rates in a
porous medium and free liquid are constructed for different values of
the model parameters. It is shown that, in special cases, the previously
obtained solutions of problems of the motion of a viscous fluid caused
by the vibration of a solid impermeable flat surface follow from the
results obtained. |
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Title: |
Reduction of environmental optical noise
in visible light communication using a Cds cell |
Author (s): |
Seong-Ho Lee |
Abstract: |
In
this paper, we introduce a new method to reduce the 120Hz noise arising
from other lighting lamps adjacent to the visible light communication (VLC)
system. A Cds cell was installed near the photodiode in the VLC
receiver, and the Cds cell voltage was subtracted from the photodiode
voltage using a differential amplifier. The Cds cell has a receiving
bandwidth much lower than the photodiode, and detects the 120 Hz noise,
but it does not respond to the high frequency signal light. Thus the
differential output of the photodiode with the Cds cell becomes an
amplified signal with the noise reduced. The signal-to-noise voltage
ratio was improved by about 17.5 dB using a Cds cell in the VLC
receiver. |
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Title: |
Nonlinearity mitigation in IM/DD optical
OFDM using new SLM scheme |
Author (s): |
Chhavi Sharma, Arvind Kumar and S. K.
Tomar |
Abstract: |
Optical orthogonal frequency-division multiplexing (O-OFDM) systems have
received a great deal of attention as a transmission technology for
high-capacity long-haul optical transport networks. However, it is also
very sensitive to nonlinear effects due to high peak to average power
ratio (PAPR) problem as conventional OFDM system. This paper proposes
Fast Hartley based selective mapping with Riemann Sequence for PAPR
reduction in IM/DD Optical OFDM system. Results show that the proposed
method performs better in terms of PAPR and bit error rate performance
and it is less complex than other conventional methods. |
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Title: |
Thermal degradation mechanism of Sewage
Sludge |
Author (s): |
B. Kamal Batcha and V. Kirubakaran |
Abstract: |
Disposing of Sewage Sludge is the major concern in waste management.
Several studies has already been carried out on thermal degradation.
Thermogravimetric studies on sewage sludge reveals that the sewage
sludge is an ideal bio-residue for gasification process. This paper
attempts in arriving mechanism of thermal degradation of sewage sludge.
A batch type rector has been developed and heated externally using an
muffle furnace. The product gas has been continuously analyzed and
reported. From the gas evolved the rate reaction is arrived and
verified. |
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Title: |
Characterization and electrical
conductivity of ionic oxide Nano films by DC and AC methods |
Author (s): |
S. N. Padhi, K. S. Raghu Ram, A. Sai Neel
Kamal, Siva Rama Krishna and B. N. Dhanunjaya Rao |
Abstract: |
We
report here the ionic conductivity characteristics of single crystal of
Yttria Stabilized Zirconia (YSZ)<100>. The targets of YSZ of one-inch
diameter and about 2-3 mm thickness were palletized and sintered in the
range of 1000-15000 C for 2-4 hours in air. These targets were polished
up to 1000 emery paper cleaned in an ultrasonic bath containing
methanol. The ionic conductivity was measured using both AC impedance
spectroscopy and DC four probe technique. An idealized plot for the
spectrum of a ceramic oxide specimen with particularly blocking
electrodes has been studied. The ionic conductivity of ceramic oxide was
compared with YSZ <100>.The investigation showed that the advantage of
AC method is to separate the bulk, grain boundary and electrode
resistance which is not possible by DC method. A single crystal of YSZ<100>
was experimented for ionic conductivity. The ionic conductivity and
activation energy of YSZ<100> at 973 K were found to be almost same in
both DC and AC method which seems to be because of absence of grain
boundary. |
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Title: |
Oxidation of beverage cans in the
temperature range 400-610oc |
Author (s): |
Nukman, Irsyadi Yani, Amir Arifin, Firdaus
M. S. and Roberto |
Abstract: |
Thermogravimetric Analyzer (TGA) is a device for carrying out thermal
analysis where the mass of the test material will be inversely
proportional to or directly proportional to the increased temperature
rate and time function. TGA is usually used to determine material
characteristics. The increasing mass curve of the element of aluminum
material can be used to determine oxidation. The point of rising
material mass can be used to calculate activation energy. This study has
used a Thermogravimetric Analyzer with aluminum test materials from used
beverage cans which are melted directly and indirectly with used
lubricating fuels. The test results show that the activation energy for
direct furnace casting (DF) is 186.2 J/mol and this is greater than
indirect furnace casting (IF) which has an E value 92.17 J/mol.
Activation energy for CAN cans is 318.8 J/mol, and for used cans without
Ink and Varnish Cw/oIV the activation energy is 350 J/mol. |
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Title: |
Novice retroaction report |
Author (s): |
R. Shiva Shankar, L. V. Srinivas, D.
Ravibabu and Raminaidu |
Abstract: |
The
Online Student Feedback Analysis System is a web based system which
collects the feedback from every individual student and provides an
automatic generation of a collective feedback which has been used to
collect feedback from the students on the main aspects of course such as
preparations, contents, delivery methods, punctual, skills,
appreciation, and learning experience. We have developed a feedback
system to provide the feedback in an easy and quick manner to any
particular department in a college or an educational institute. The
feedback is collected in terms of qualitative scores. Recent approaches
for feedback mining use manual methods and its focus mostly on the
qualitative comments. So the evaluation cannot be made through deeper
analysis. Student feedback mining system (SFMS) which applies text
analytics and sentiment analysis approach to provide instructors a
quantified and deeper analysis of the qualitative feedback from students
that will improve the students learning experience. We have collected
feedback from the students and then text processing is done to clean the
data. Feedback comments about each topic are collected and made as a
cluster. Classify the comments using sentiment classifier and apply the
visualization techniques to represent the views of students. This
proposed system is an efficient approach for providing qualitative
feedback for the instructor that enriches the students learning. With
the help of this application, we can give feedback through the online
system much faster than the existing paper feedback system. The existing
system takes more time to get the feedback from the students, thus the
online feedback system is implemented. Students will fill online
feedback using a standard form provided online. Special care has been
taken to provide the security in the proposed system as only the
authentic user is able to see the collective feedback of a batch of the
students and can also get to know about the collective opinion. The
application of giving the feedback is not only objectively (i.e. rating
out of a fixed constant value) but also in subjective manner by leaving
their comments and reviews about any particular field or subject. The
main objectives of feedback analysis system are the conventional
objective analysis as well as Subjective analysis with the help of
Sentiment Analysis. |
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Title: |
Design and analysis of a SEPIC converter
for PV applications |
Author (s): |
D. Vinodini, S. Hema, S. R. Akshaya and K.
Fathima |
Abstract: |
This
paper presents analysis and design of a SEPIC Converter. Operation of
the single ended primary inductor converter (SEPIC) is analyzed, leading
to mathematical expressions that can be used to design the converter.
The SEPIC converter allows a range of dc voltage to be adjusted to
maintain a constant voltage output. SEPIC converter is used to overcome
the limitation of conventional buck boost converter like inverted
output, pulsating input current, high voltage stress make it unreliable
for wide range of operation. MATLAB simulation is being used to validate
the method and show the effectiveness of the design. |
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Title: |
Microwave attenuation and phase rotation
in sand and dust storms - Part I |
Author (s): |
Abdulwaheed Musa and B. S. Paul |
Abstract: |
Microwave signal propagation may suffer attenuation and phase rotation
by suspended particles during sand and dust storms (SDS) in arid and
semi-arid regions of Africa and Asia. This development has received
considerable interest in recent time. Thus, attenuation and phase
rotation induced by SDS were investigated and models for estimating
these propagation parameters are presented in this paper. Using Rayleigh
method, the models were premised on the complex forward scattering
amplitude of dust particles with spherical shape. Three different
conditions were tested to proof the suitability of the method used. The
results show that the Rayleigh approximation method is suitable and
valid in determining scattering effects of dust particles with spherical
shape for frequency range and dust particle sizes considered. The
microwave (MW) attenuation and phase rotation expressions are proposed
as functions of visibility, complex permittivity and wavelength. It was
found that attenuation and phase rotation increase with increase in
severity of SDS. Also, attenuation in dry dust is only influential at
frequency of lower millimetric wave range or when the visibility becomes
severe. |
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Title: |
Mathematical model of a hydrodynamic
cavitation device used for treatment of food materials |
Author (s): |
Lubov Prokhasko, Oksana Zinina, Maksim
Rebezov, Rustem Zalilov, Zhanibek Yessimbekov, Irina Dolmatova, Yuliya
Somova, Aleksey Peryatinskiy, Sergey Zotov and Ekaterina Tumbasova |
Abstract: |
The
article analyzes the physicochemical effects during cavitation action on
the liquid medium. The characteristic of ultrasonic and hydrodynamic
cavitation is presented. Particular attention is paid to the use of
cavitation technology in the food industry. A review of the latest
research is presented showing that hydrodynamic cavitation is not only
an alternative to acoustic cavitation for the management of chemical,
biochemical, physical processes, but also a priority in the processing
of large volumes of liquid process media, which determines its
industrial application. A hydrodynamic cavitation device is proposed,
the working process of which is fundamentally different from traditional
cavitation devices, namely: the formation in the cavitation area of a
supersonic flow in a homogeneous two-phase medium, which under
conditions of friction of the working chamber (throat) passes into a
subsonic flow through a pressure jump. Thus, the cavitation effect on
the flow is amplified by the shock action of the pressure jump when the
supersonic flow transfers into subsonic flow, which is a powerful
intensifying factor at an energetically higher level when the liquid
medium is transformed. The working process of a hydrodynamic jet
cavitation device and a cavitation device with a hydrodynamic grid is
described in detail. A mathematical model is developed for calculating
the transverse and longitudinal dimensions of cavitation devices, in the
compilation of which, the fundamental laws of conservation of mass and
energy, the basic equations of hydrogasdynamics in their generally
accepted mathematical form, and reliable semi empirical data are used. |
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