|
ARPN Journal of Engineering and
Applied Sciences September 2021 | Vol. 16 No. 18 |
|
|
Title: |
Assessment of current generated in a
photo-electrochemical cell using N-TiO2/Cu2O electrodes and stainless
steel as working electrode |
Author (s): |
Álvaro Realpe, Breanda Chamorro and María
T. Acevedo |
Abstract: |
N-doped TiO2 and Cu2O nanoparticles were synthesized through a chemical
reduction of the titanium (IV) isopropoxide and copper (II) sulfate
5-hydrate, respectively. TiO2 nanoparticles were doped with N at
different concentrations (10, 20 and 30% wt.) to modify its optical
properties. The photoactivity of the elaborated photoelectrode was
analyzed by means of photocurrent generation and UV-Vis spectroscopy.
The bandgap energy of the N-doped TiO2photoelectrode decreased with
increasing N concentration and the Cu2O photoelectrode has the energy
value of the lowest bandgap, 2.1 eV. Furthermore, Cu2O photoelectrode
generates higher photocurrent than N-doped TiO2 electrodes. |
|
|
Full Text |
|
|
Title: |
Characterization of bentonite in Karaçeva
deposit |
Author (s): |
Mehush Aliu, Milaim Sadiku, Mensur
Kelmendi and Sadija Kadriu |
Abstract: |
The
objective of this paper is to research the reserves, lithological and
chemical composition, percentage of montmorillonite and ion exchange
capacity of bentonite in the Karaçeva deposit. Based on the calculations
results of the geological reserves of the Karaçeva bentonite for
different surface and thickness of the blocks, the total volume of
bentonite reserves at the Karaçeva deposit is 832595.26 m3. The chemical
composition values of bentonite components vary for different
composites. Based on the obtained results, Karaçeva bentonite is
characterized by high SiO2 content. The percentage of montmorillonite
for different drilling depths ranges from (47.3-75) %. The value of
ion-exchange capacity for different drilling depths ranges from (46 mmol
M/100g) to (95 mmol M/100g). |
|
|
Full Text |
|
|
Title: |
A robust CT scan application for prior
stage liver disorder prediction with GoogleNet deeplearning technique |
Author (s): |
Venkateswarlu Gavini, G. R. Jothi Lakshmi
and Md Zia Ur Rahman |
Abstract: |
Recent technologies mainly concentrate on medical applications based on
image processing tools. The medical image processing has recognized the
different diseases with fast diagnoses, such as lung, heart, brain
tumour and liver. The earlier stage of disease diagnosis helps to
identify appropriate disease treatment. In this investigation, CT scan
based liver disease or disorders have been predicted and classified
based on the GoogleNet CNN (Convolutional nueral networks) deep learning
algorithm. At the initial stage, the local threshold (LT) segmentation
model and at the classification stage Improved GoogleNet CNN deep
learning model applied on selected real CT liver images. This work
mainly focuses on liver disorders prediction and disease identification
using CT liver medical images. The proposed LT-GoogleNet CNN deep
learning model diagnosis the liver diseases with real and accurate
manner. Here we used the two different algorithms to identify the black
and white pixels on the given data set CT images to remove noise on the
practical image to get proper and good accurate results. The performance
measures such as precession, accuracy, PSNR, CC and time of diagnosis
has been improved. At final implemented LT-GoogleNet CNN deep learning
model compared with existed methods, conclude that this mechanism is
efficient. After doing the practical values we got using the mentioned
proposed method Google Net CNN prediction probability is good accuracy
as 98 and precession 98.6, Recall 98.3, F1 score 98.4, PSNR 59.8, CC
99.83predection of liver disease is verified using the different
database ANDI-1 and ANDI-2. |
|
|
Full Text |
|
|
Title: |
Soret and Dufour effects on MHD transient
flow over an exponentially accelerated plate with ramped temperature |
Author (s): |
S. Jayaprasad, Siva Reddy Sheri, D.
Mahendar and Anjan Kumar Suram |
Abstract: |
This
article deals with the effects of Soret and Dufour on MHD transient flow
over an exponentially accelerated plate with ramped temperature. The
dimensional flow governing equations associated with boundary conditions
are converted to non-dimensional form. These converted equations are
solved for numerical solutions by using Finite element technique. To
understand the influence of individual emerging flow pertinent
parameters, obtained results are depicted and illustrated in depth with
the aid of graphs. Tabulated representation is used to exemplify the
variations in skin frictions, Nusselt number and Sherwood number against
different parameters. In a special case acquired computational results
are compared with the existing literature and a satisfactory
coordination is achieved. |
|
|
Full Text |
|
|
Title: |
Undoped and manganese doped iron oxide
nanoparticles for environmental applications |
Author (s): |
Erwin Amiruddin, Heri Hadianto, Martha
Riana, Salomo Sinuraya, Mohammad Deri Noverdi and Ainun Syarifatul Fitri |
Abstract: |
Iron
oxide nanoparticles of undoped and manganese doped were prepared from
natural sand of Logas District Kuansing Regency Riau Province using ball
milling method. Structural and morphological properties of these undoped
and manganese doped iron oxide nanoparticles in the range of 0%-20%.
were studied. Crystalline size, interplanar spacing and surface
morphologies of the samples were estimated and the results are
discussed. The X-Ray Diffractometer (XRD) analysis reveals that
diffraction peaks shift to slightly smaller angles as compared with
undoped samples due to bigger atomic radii of manganese (161 pm) as
compared to that of iron (156 pm). The average crystalline size of the
manganese doped iron oxide nanoparticles increases with increasing
manganese content up to 10%. Further increase in manganese content to
15% reduces the average grain size, which might be because of the
presence of more manganese atoms at the grain boundaries. Moreover,
peaks corresponding to manganese oxide or metal manganese could not be
observed in the diffraction patterns. Some other diffraction peaks from
other crystalline forms such as silicon (Si) and titanium (Ti) were
observed. Morphology of undoped and doped manganese iron oxide
nanoparticles is irregular, agglomerated and non-homogenous distribution
visualized through scanning electron microscopy (SEM). |
|
|
Full Text |
|
|
Title: |
Composite catalysts based on fly ash of
thermal power plants and natural zeolite for purification of gas
emissions and catalytic cracking of fuel oil |
Author (s): |
T. V. Shakiyeva, L. R. Sassykova, A. A.
Khamlenko, B. T. Dossumova, A. R. Sassykova, A. A. Batyrbayeva, Zh. M.
Zhaxibayeva, M. A. Kozhaisakova, R. N. Azhigulova and S. Sendilvelan |
Abstract: |
In
this research the hollow microspheres based on fly ash from the
Ekibastuz coal deposit (Kazakhstan), produced as a result of the
operation of TPP-2 (Almaty, Kazakhstan) were used for investigation of
two processes. The composite on the base of cenisheres was applied in
the technology of SO2 oxidation with oxygen in aqueous solution at
T=40-60°C. Conditions of selective oxidation of SO2 (100%) to obtain
sulfuric acid as a product were optimized. Specific surface of the
catalyst calculated according to full isotherms of low-temperature
adsorption of nitrogen by BET method makes 12.6 m2/g. Integral volume of
pores makes 0.57 ml/g. The results showed that the degree of SO2 removal
was up to 94.9%. The catalysts based on fly ash cenospheres with
addition of natural zeolite from Tayzhuzgen field (Kazakhstan) were also
tested in the process of catalytic cracking of fuel oil (with
preliminary electromagnetic excitation of hydrocarbon molecules) to
obtain light carbon fractions. On the optimal catalyst in the products
of oxidative cracking of fuel oil, the fraction of light gas oil is the
main part. Determination of the individual composition of the
hydrocarbons included in this fraction showed that the formation of
C7-C12 hydrocarbons happened exclusively due to the symmetric
decomposition of C14-C24 paraffins, since the products of this reaction
are the corresponding a-olefins and n-alkanes. |
|
|
Full Text |
|
|
Title: |
Energy saving in resonant wireless charger
using self-oscillating resonant inverter with P&O algorithm |
Author (s): |
Ramón Álvarez-López, José López-Prado and
José Araque-Gallardo |
Abstract: |
The
wireless charging of electronic devices, such as electric vehicles, is
an alternative that promises comfort and convenience to the user. The
resonant converters are an important alternative for the implementation
of power conditioning circuits with an excellent density/power ratio,
this backed by high efficiency and the possibility of switching the
transistors to low currents and voltages. A limitation of the wireless
charging systems of a resonant nature is the dependence between the
parameters of the resonant filter and the power delivered to the load.
In this work, a control alternative for a resonant DC-DC converter is
presented. The simulation results validate the proposed hypothesis, in
which the possibility of obtaining a DC-DC resonant converter operating
at the maximum power predicted by the tank before variations in its
parameters is manifested. |
|
|
Full Text |
|
|
Title: |
Development and implementation of
technical and economic model of the potential of operation schedules of
coal mines |
Author (s): |
Andrii Khorolskyi, Oleksandr Mamaikin,
Volodymyr Medianyk, Victor Lapko and Viktorii Sushko |
Abstract: |
Purpose is to determine parameters concerning development of the
perspective time program to extract reserves providing complete
predictability of the progress of mining operations within the sequent
areas of a mine field. The conditions are those under which any mine can
provide rather stable mining of the intended coal volumes; labour
productivity increases within the prescribed limits as a result of its
production and economic activities the mine raises the amount of money
required to provide resource potential. Methods. Algorithm, relying upon
economic and mathematical model to determine values of basic parameters
within the coordinate system of technical and economic potential of a
mine, is the basis to form such an algorithm for the determination of a
potential of operation schedule of a mine as well as strategic
parameters of its implementation. The priority obviousness of the basic
parameters, identifying a level of operation schedule, depends upon
their closeness to the factors being arguments of lower orders. That is
why optimization process involved the development of a system of
additional restrictions reflecting interconnections between factors of
the first order and lower orders. Findings. Analysis of functional
relationships and correlation relationships between variables in the
context of corresponding equations has helped determine new analytical
dependences which, together with the available functional dependences
between production characteristics of a mine, make it possible to
develop a model to determine values of basic parameters of operation
schedule of a mine. In this context, the obtained model is completed
with additional restrictions, certain meanings of each variables and the
problem solving is limited by Pareto set for the selected variables.
Scientific novelty. As for the mines, which standing is characterized by
the optimization indices, priority of effect on strategic parameters of
their production activities, should be as follows: first, effect on the
parameters which actual values excess their critical value, determined
in terms of zero value of economic added value under formation,
corresponds to relative deviation of the parameter actual value from its
critical value (maximum to minimum); second, effect on the parameters,
which values do not excess their critical values but differ from their
optimum ones, determined for the reference economic potential, should be
performed in accordance with a coefficient of the parameter elasticity
as for such integral index as “economic added value” (greater to
lesser). Practical relevance. Implementation of the model, intended to
determine technical and economic potential of mines with the development
of Pareto sets, has made it possible to obtain both minimum and maximum
values of longwall advance for a group of anthracite mines in Shakhtarsk
and Dolzhansk-Rovenky regions to be analyzed. Selection of a reference
level of technical and economic potential of a mine, which is less than
zero, makes it possible to make a decision concerning closing of certain
mines based upon economic expediency, i.e. added value creation. Owing
to the abovementioned, two groups of Ukrainian anthracite mines have
been identified which are determined as profitable or unprofitable
relying upon objective indices. That also helped specify a status of
“depressive territories” where underdevelopment in social and economic
sphere takes place. |
|
|
Full Text |
|
|
Title: |
Geometric planning of Toll Roads on Ringroad road development |
Author (s): |
Syaiful Syaiful and Fery Syahrulloh |
Abstract: |
Geometric planning of Toll Roads for Section IIIA Bogor Ring Road. Bogor
City and Bogor District are part of the Jakarta, Depok, Tangerang and
Bekasi regions which have become a buffer for the Indonesian capital
city, Jakarta. This resulted in very rapid regional growth. Bogor City
and Bogor District are functioned as development areas that will be able
to accommodate various types of activities such as housing, industry,
agriculture, tourism and others. The problem of traffic in the city of
Bogor, especially at this time is the traffic congestion at several
nodes prone to traffic jams caused by delays in traffic flow. One
alternative that is expected to provide a solution is to build the Bogor
Ring Road Toll Road. The construction of the Bogor Ring Road Toll Road
is divided into 3 sections; section I of segment Sentul Selatan-Kedung
Halang, section II is divided into IIA; section IIA of segment Kedung
Halang-Kedung Badak, section IIB of segment Kedung Badak-Simpang Yasmin
segment are already in operation and section IIIA of the segment Yasmin
Simpang-Salabenda intersection segment are in the planning stage. In the
geometric planning of toll roads, horizontal alignment is calculated so
that the horizontal alignment curve type is obtained and the horizontal
alignment arch length is in accordance with the road geomertic standard.
From the calculation results obtained 4 types of horizontal alignment
arches and the length of horizontal alignment arches; the first
horizontal alignment arc-circle-spiral length 707,831m, the second
full-circle horizontal alignment arc length 264,913m, third the
horizontal full-circle alignment arc length 311.01m, the fourth
horizontal-arc-circle-spiral alignment arc length 464,985m. |
|
|
Full Text |
|
|
Title: |
Determination of functional dependences of
technological modes and parameters in induction surface |
Author (s): |
Masanskii O. A., Tokmin A. M., Pochekutov
S. I., Kazakov V. S., Larionova N. V., Lytkina S. I., Khudonogov S. A.,
Stankeev V. V. and Marchenkova S. G. |
Abstract: |
One of
the practical ways to increase the wear resistance of products operating
under various wear conditions: shock, shock-abrasive and abrasive - is
the surfacing of the working parts that are most susceptible to this
effect. The use of induction surfacing with the use of modern transistor
generators makes it possible to form a given set of properties of the
resulting composite material, which allows to significantly increase the
resource of the product and, as a result, to increase the technical and
economic indicators. High-energy impact makes it possible to control the
rates of heating and cooling, which leads to the creation of maximum
non-equilibrium structures, which, under certain conditions, can provide
the required complex of physical, mechanical and operational properties.
The control of the structure formation of materials of a given
composition, under conditions far from thermodynamic equilibrium, makes
it possible to provide the required durability of the working zone of
the product, taking into account the nature of wear. The purpose of this
work is to establish functional dependencies of technological modes and
parameters for induction surfacing. In the course of the experimental
studies, data were obtained characterizing the relationship between the
following parameters - the deposition rate, the deposited layer
thickness, the magnitude of the increase in wear resistance and the
hardness of the material. The obtained functional dependencies between
these parameters made it possible to determine the required deposition
rate and the thickness of the deposited layer ensuring the formation of
a given set of physical and mechanical properties of the composite
material, taking into account the nature, which is of high practical
importance. |
|
|
Full Text |
|
|
Title: |
Development of algorithm to simulate
effect of moving loads to pontoon bridge |
Author (s): |
Tram Bui Van, Hoang Nguyen Huy and Cuong
Le Van |
Abstract: |
The
paper presents a approach and development of an algorithm to simulate
the impact of moving loads move through pontoon bridge. The dynamic
model of ribbon pontoon bridge is built by finite element method, the
bridge is impacted of external force including: hydrodynamic force of
water current is considered as unevenly distributed force along the
bridge and the vehicles cross over the bridge. These vehicles are
considered as masses of moving load which move on the space frame
elements, therefore weight of them is considered as external forces
change position over time and cause oscillation with for the bridge.
Building an algorithm for to determine the position and value of the
force acting on the elements is an important issue when to research the
effect of weight, speed, deviation of vehicle to the working of pontoon
bridge. |
|
|
Full Text |
|
|
Title: |
The implementation of the AgroRed
component in Bogota: A perception of rural implications |
Author (s): |
Jaime Ussa-Garzón, Omar Patiño and Wilson
Gordillo |
Abstract: |
This
research aims to resolve the doubts raised by the identification of the
perception of the actors of the rural area of the locality of Usme in
Bogotá, who have historically lived in this territory before the
adoption of the AgroRed component and its involvement as an agent of
change that contributes to rural development in the locality, based on
the analysis of the strategies so far developed by the food security
policy and the master plan for food supply and food security, supported
by the theory of sustainable development with a descriptive
methodological approach of interrelation of primary and secondary
sources focused on the case study with information triangulation
techniques to structure a plan of recommendations that includes the
actions to be deployed to achieve a strategy to strengthen rural
development in the locality. |
|
|
Full Text |
|
|
Title: |
Analysis of the overturning of heavy
vehicles in the “the Adioses” curve of the highway Pamplona-Cúcuta |
Author (s): |
Gonzalo Guillermo Moreno Contreras, Albert
Miyer Suarez, Cesar Peña, Faustino Moreno Gamboa and William Aperador
Chaparro |
Abstract: |
Over
time, it has been observed that accidents due to vehicle overturning in
the “The Adioses” curve of the Pamplona - Cúcuta road are a fairly
frequent problem due to several factors such as: high speeds, absence of
traffic signs, driver maneuvers, among others. This is why this section
of the road has been classified as a critical accident point. The
vehicles that are most affected are heavy vehicles (truck tractors),
which due to their large size have a high gravity center, which hinders
their stability compared to other vehicles. Another important aspect
that it is taken into account is the characteristics of the road that
can modify the load distribution in the vehicle. All these aspects are
evaluated through a case study which allows calculating the stability
factor for a particular heavy vehicle and calculating the safe traffic
speed for this vehicle in the specified sector. |
|
|
Full Text |
|
|
Title: |
Intelligent system for the recognition of
facial emotions: A tool for people with autism spectrum disorder |
Author (s): |
Ferley Medina Rojas, Juan A. Castro Silva
and Faiber Robayo Betancourt |
Abstract: |
Autism
spectrum disorder (ASD) is a neuropsychological disorder that begins at
an early age in people and prevails throughout life. It affects the
ability to communicate and interact with other people; they do not
interpret facial emotions (Scared, Disgusted, Happy, Sad, Angry,
Surprised, Contempt, and Neutral) like other people, resulting in
isolation. Emotions help communicate to understand what other people
feel. This paper presents a model for the recognition of emotions
through facial expressions. It makes use of convolutional neural
networks based on the VGG-Face architecture, trained to recognize faces
and predict 8 emotions. The dataset used contains 13,000 images of
people around the world. The precision obtained from the model was 84%,
a value that will help people with ASD to recognize emotions so that
they can interact in society. |
|
|
Full Text |
|
|
Title: |
Low-cost temperature control system for
classroom |
Author (s): |
Julián Guillermo Ortiz-Trujillo, Christian
Mateo Guevara-Puentes and Diego F. Sendoya-Losada |
Abstract: |
This
document presents the design and implementation of a low-cost and
easy-to-handle temperature control system. The system allows to
manipulate the power and luminosity of an incandescent lamp and in this
way control the temperature, by varying the firing angle of a TRIAC.
Both the user interface and PI control are implemented with the Arduino
UNO board. This document is intended to serve as a guide for the
application of power systems, without having extensive knowledge in the
control area. |
|
|
Full Text |
|
|
Title: |
Durability analysis of concrete with
partial cement replacement with flyash and MWCNT incorporation |
Author (s): |
B. Ashwini and B. Vidivelli |
Abstract: |
The
concrete incorporated with Multi-Walled Carbon Nanotube (MWCNT) with
partial cement replacement with flyash was researched for its durability
properties. In this research the concrete was cement replaced with
flyash at 20%. The incorporation of the MWCNT were done at 0.025%, 0.05%
and 0.075% of the weight of the cement. The incorporation of MWCNT was
done with the proper dispersion process and the Poly Carboxylic Ether
was used as the dispersant.. The durability properties of the concrete
were analysed by conducting the acid resistance, chloride resistance and
sulphate resistance tests. It was observed a significant improvement in
the durability properties of the concrete after the partial replacement
of cement with flyash and the incorporation of MWCNTs. The six numbers
concrete cubes of size 150 mm x 150 mm x 150 mm were casted for each mix
for each tests. |
|
|
Full Text |
|
|
|
|
|