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ARPN Journal of Engineering and
Applied Sciences November 2020 | Vol. 15 No.
22 |
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Title: |
Cross Flow Kinetic Turbine performance using computer fluid dynamic
simulation |
Author (s): |
Rudy Soenoko and Erwin Sulistyo |
Abstract: |
The purpose of this research is to observe a kinetic turbine with a new
design. Kinetic turbine with this new design adopts a cross flow turbine
design. As with kinetic turbines in general, kinetic turbines with this
new design also only rely on the water flow rate to drive the turbine,
which is then converted into electrical energy by utilizing a generator.
It is hoped that this Cross Flow Kinetic Turbine can improve the
performance of kinetic turbines, which are known to have a low
efficiency. The research system conducted is a simulation that utilizes
CFD software. This simulation activity is comparing water behavior in a
kinetic turbine by observing the water trajectory between the turbine
blades. The kinetic turbine that will be compared with the cross flow
kinetic turbine (CFKT) is a Curve Bladed Kinetic Turbine (CBKT). The
reason for comparing with CBKT, is because the CBKT has been tested
experimentally in the fluid mechanics laboratory. So by comparing the
water behavior in this case is the water line trajectory, then the CFKT
as a turbine with a new design can be predicted whether it has a better
performance than the CBKT or not. In this modeling activity, the focus
of the observation is on the movement of water velocity in the blade
chamber which will produce momentum or thrust. From the results of this
test in general, the Cross Flow Kinetic Turbine has a good performance,
because the push of water flow occurs on four blades. Namely the push on
two blades on the first stage and push on the two blades on the second
stage. Whereas on the Curve Bladed Kinetic Turbine only two blades get a
boost. Keep in mind that a push on the blade by the speed of the water
will produce momentum that represents the thrust on the turbine blade.
From the prototype test results for the 5? runner position the water
velocity that produces a boost at CFKT is equal to 3,151 m/s in area a,
4,051 m/s in area f, 2,701 m/s in area b and 4,051 m/s in area e.
Whereas for the CBKT the water flow velocity is 2.233 in the area a and
the water flow velocity in area b is equal to 2.233 m/s. From this
result, it can be seen that the CFKT has a better performance than the
CBKT. Overall at each runner's position, the momentum generated at the
CFKT is greater than the momentum generated at the CBKT. |
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Title: |
Double nitrogen-doped carbon to support Fe-N-C catalyst in
electrochemical and physical properties |
Author (s): |
Vuri Ayu Setyowati, Diah Susanti, Lukman Noerochim, Chen-Hao Wang and
Fauzan Abdul Aziz |
Abstract: |
The aims of this study is to analyze the new material substitute for
Pt/C catalyst with the main material Fe as a metal precursor, graphite
as carbon, and variations of nitrogen derived from organic compounds.
The homogenous mixing generated a nitrogen-coated carbon surface after
pyrolysis. Nitrogen and carbon were fixed in the ratio of 1:1 and mixed
with the compound FeCl3.6H2O dissolved with ethanol. The percentage of
Fe was 7wt%. Pyrolysis was carried out at 700°C for 2 hours under N2
atmosphere. The formation of new compounds after pyrolysis, such as FeS
and Fe2O3, has a role to increase catalytic activity. The Fe-N (urea +
PVP) -C catalyst has the largest CV and current density area compared to
the Fe-N (urea) -C and Fe-C catalysts. These results are caused by the
largest surface area of 7.239 m²/g of Fe-N (urea + PVP) -C and have a
uniform distribution of nitrogen on the carbon surface as shown by the
SEM observation image. In addition, the good electrochemical properties
of the Fe-N (urea + PVP) -C catalyst due to the high nitrogen content of
the EDX analysis of 2.97 wt% demonstrate it is possible to form nitrogen
functional groups after pyrolysis. |
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Title: |
Investigation on effect of dynamic loads on multistoried car parking
structure and parked vehicles |
Author (s): |
Tafazul Azim Reshi and G. Augustine Maniraj Pandian |
Abstract: |
In a typical developing country like India where urbanization is taking
place at a rapid pace, multistory parking structures have started
mushrooming in almost every city landscape. Firstly, the structure has
to be made earthquake resistant. Secondly, the parked vehicles have also
to be protected from damage during an earthquake. The safety of parked
vehicles is seldom factored into the design. During extreme lateral
loading the vehicles themselves will be subjected to excessive
displacements which will make them collide with each other leading to
considerable damage especially to sensitive electronic / digital
controls. Normally the parked vehicles are modelled as mass objects in a
structure. However, if one has to understand the behaviour of parked
vehicles, the same have to be modelled as dynamic objects with mass and
stiffness. This work has precisely considered this important aspect,
which is rarely addressed, and herein lies the uniqueness of this
research work. This work envisages analysis of a G+11 car parking
structure with moment resistant frame as the structural system. The
analyses consisted of essentially two procedures; one to model the
parked cars as mass objects, treating them as point loads; second, to
treat them as dynamic objects, treating each car as single storey portal
frame with mass, stiffness and supports. In order to model the car as
dynamic object, a typical automobile was considered and its mass and
stiffness were found out and from these values, an equivalent frame
model was arrived at. Further the analyses included considering mass
regularities vertically across the floors as well as horizontally within
the floors. Overall 11 models were analyzed five with cars as mass
objects and five with cars as dynamic objects. The results studied were
base shear, time period, displacement of structure as a whole and
displacement of individual cars. It is seen that modelling of the parked
vehicles as dynamic objects increases the rigidity of the structure
resulting in higher base shear with the percentage difference ranging
from 4.58% to 4.75% in comparison with the structures in which parked
objects are treated as mass objects. Therefore, from safety point of
view modelling of parked vehicles as dynamic objects is required. Car
displacement varies from 3.48 mm in ground floor for model Ms2 to 24.74
mm in 11th floor for model Ms5 whereas corresponding floor displacements
varies from 2.81 mm to 23.84 mm, indicating the cars do not collide
during an earthquake. |
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Title: |
The influence of annealing temperature on variation of physicomechanical
properties of wall ceramic tiles based on loess loam modified by oil
sludge |
Author (s): |
Muratbai Zhanaidarovich Ryskaliyev, Sabit Muratovich Zharylgapov, Nargul
Amanovna Saktaganova, Ulbossyn Zhangabilkyzy Sarabekova and Uliya
Baktybaevna Abdikerova |
Abstract: |
This work is aimed at investigation into oil sludges and their
application in the composition of ceramic pastes as energy-efficient and
modifying component for production of ceramic bricks. The article
discusses the results of experimental study of oil sludges. Innovative
engineering approaches to conversion of oil sludge into organ mineral
conglomerate state have been developed. It has been established that
addition of organ mineral conglomerate mixture with oil sludge converts
ceramic paste based on loess loam from high-sensitive matters into
low-sensitive ones. Combustion of oil sludge in the composition of
organ mineral conglomerate mixture makes it possible to increase
temperature in furnace and accelerates baking of ceramic bodies. This is
evidenced by reduction in baking time of samples from 9 to 7.5 hours.
This process provides decrease in energy consumption at the stage of
article baking. Moreover, the weight of final product decreases by 15-20
%, which simplifies labor procedures and increases labor efficiency upon
brick laying. Herewith, the load on building foundation decreases, thus
reducing material consumption upon construction by nearly 10-12%. |
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Title: |
Comparison of machining performance using self-developed portable vacuum
clamping system |
Author (s): |
N. Ab Wahab, N. S. Apandi and Mohamad Nor Iqbal Bin Samsul Mafrizal |
Abstract: |
Usually instruments or holding equipment such as vise are used to clamp
the piece of job. Due to the low stiffness of the workpiece during
machining, thin wall components have always been a challenge to clamp.
This study aims to compare the effect of machining performance using
self-developed portable vacuum clamping system (SPVCS). SPVCS had been
developed at laboratory. This study is to evaluate the work-ability of
SPVCS; two process of machining process had been tested. Experiments
were conducted on acrylic to end mill machining and engrave machining
with parameters selected to cut. To analyses the result for end mill
process, systematic measurement of process response parameters in terms
of surface roughness had been conducted. The surface roughness was
analyzed to observe the influence of process parameters on the suction
vacuum clamp during machining. While for engrave process Coordinate
Measurement Machine (CMM) had been used to check and verify the result
of thickness at 13 points that been selected. For each machining process
two condition of machining condition had been observed. Firstly,
continuously vacuum pressure method and secondly, remain vacuum pressure
method. The result showed that vacuum clamping contributed in better
surface roughness with average value of 0.585µm for continuously
pressure method and 0.663µm for remain pressure method for end mill
process. On the other hand, the result also showed that vacuum clamping
contributed in better dimension accuracy with average value of 14µm for
continuously pressure method and 8µm for maintain pressure method for
engrave process. As a conclusion, it was proofed that the vacuum
clamping can improve the machining performances of acrylic plate in term
of surface finishing and surface roughness quality. |
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Title: |
Mathematical model for valuing options |
Author (s): |
Alvaro Javier Cangrejo Esquivel, José Rafael Tovar Cuevas and Faiber
Robayo Betancourt |
Abstract: |
In this article, the classical theory leading to the Black-Scholes
equation, widely used in the market model for valuing financial options
developed. In this sense, the mathematical development from a stochastic
differential equation leads to the equation, Black Scholes; therefore,
the model’s solution is presented. Initially, the model is transformed
into the heat equation, and then it is combined with the inverse Fourier
transformation, supported in the performance of the separation of
variables method and the description of the solution according to the
nature of the root of the characteristic polynomial. A solution of the
call option is achieved. From this, through the parity relation, the
value of a put option is also found. Finally, the volatility parameter
associated with the model is estimated through the classic and Bayesian
approach, where it was shown that when evaluating the premium or price
of the option from the volatility estimate from the Bayesian approach,
it presents a lower proportion of risk to what happens in the financial
market. |
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Title: |
Sustainable about the need of parking systems at the
Mall RDS Bogor |
Author (s): |
Syaiful Syaiful, Heru Prayoga and Juang Akbardin |
Abstract: |
Mall is currently in great demand from Indonesian people to meet daily
needs and is part of the modern lifestyle. The more the number of Mall
in the city of Bogor, the more attract consumers to come shopping. In
attracting customers to come is to improve facilities at the study site
of Mall Ramayana Department Store/Mall RDS in Bogor Square. The location
of Mall RDS Bogor is very strategic and located in the heart of the
city. Beginning in 2017 in the construction of the BORR Toll Road
Session IIA, directly affected the parking facilities. Reduced parking
spaces about 40% of the original affect the overall parking performance.
Reduced parking lots led the research team to examine the deductions.
The research team conducted a study on static capacity and dynamic
capacity. From the results of the study, parking capacity of off street
passenger cars in Mall RDS shows static capacity of off street parking
space of passenger cars based on effective floor area has not fulfilled
the requirement of 225 Units of Parking Space/URP. While off street
parking space passenger cars have a dynamic capacity of 393 vehicles and
can meet the needs. |
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Title: |
A comparison study of biotic factor’s effect on photosynthesis processes
of soybean by using MultispeQ device on photosynq.org platform |
Author (s): |
Y. Dutbayev, N. Sultanova, V. Tsygankov, R. Islam and N. Kuldybayev |
Abstract: |
One of the modern devices for monitoring photosynthesis is MultispeQ
that is the open-source scientific instruments designed to collect
high-quality data for in situ plant studies. Soybean (Glycine max (L.)
Merr) is an important oilseed crop in Kazakhstan, but in recent years
its production affected by widespread soil-borne diseases especially
root rot by Fusarium spp in Western Kazakhstan. Monitoring plant
physiological responses to biotic vectors are unique to evaluate the
effects of different vectors on host processes involved in plant growth
and yield. The aim of the study was comparison study of biotic factors (Fusarium
infection and genotype). Soybean physiology was studied with the
MultispeQ device on photosyng.org platform to test 12 different
genotypes. R software was used to identify the most important
physiological parameters in selecting the most adaptive varieties of
soybean. Results showed that soil infection of F. equiseti significantly
impacted and increased to linear electron flow (LEF) chlorophyl fraction
indexes on Samer-1, Samer-2, Toury, Anastasya, Samer-3, Samer- 5, Belor,
Swapa and Cheremosh soybean genotypes with respect to non-inoculated
genotypes. The general distribution of LEF chlorophyl fraction indexes
before inoculation decreased as compared to ones after experiment. Our
results suggested that soil infection affected LEF chlorophyll fraction. |
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Title: |
Validation of an experimental method for peak temperatures evaluation on
a RR Merlin XX head |
Author (s): |
Luca Piancastelli, Federico Calzini and Stefano Cassani |
Abstract: |
Aluminum alloy properties are hugely influenced by temperatures and
stress gradients. In piston engines, temperatures vary slowly when
compared to operating pressure and stress. Therefore, averaging the
temperature values is a valid assumption. This paper compares the
experimental head temperatures of a Rolls-Royce-Merlin-XX-head with the
ones of a NACA paper on a very similar Merlin-Packard-V-1650-7. This
experimental method in based on residual hardness measurement on a head
of a RR Merlin that crashed in Italy during WWII. The first part is to
define the “working life” in hours of the engine. A few samples from a
“cool” part of the head give the initial “thermally intact” hardness.
Then the hardness of a few samples from a known temperature part is
measured. In our case, it is the part of the head that is directly
exposed to coolant. The time interval that gives a residual hardness
equal to the one of the part of the head that is directly exposed to
coolant gives the engine working life. For this purpose, a set of “cool
part” samples are kept in at the maximum constant temperature of the
coolant (135 degrees C). Then, a few specimens are kept at higher
temperatures and are extracted from the oven at regular time intervals.
The residual hardness is measured on these specimens. A further set of
specimens is subjected to random thermal cycling to verify that the
alloy hardness reduction is influenced by the time at high temperature
and not by the thermal cycle history. In this way, a correlation between
residual hardness and temperature is obtained for the specific engine
alloy. It is then possible to measure the residual hardness of various
points of the head and to obtain the maximum temperature reached in a
specific point. In general, experimental tests have confirmed the
cost-effectiveness of this approach. The NACA TM 2069 data and the ones
measured with this method show an extremely good correlation. It is then
possible to affirm that, also for the alloy used for the Merlin head, a
modified Hiduminium RR50, this method of test is valid. Other positive
tests were performed in the past with the much more common AlSi9 alloy
used for the head of FIAT-1900jtd-8V automotive engine. The method of
the residual hardness is old and has met several critics in the
scientific community. This paper demonstrates that, for at least a few
aluminum alloys, it is still valid. It is a very inexpensive method to
evaluate temperatures in new engines using disposed units with a known
load history and time. The results are precious to verify that the
simulation results used in the head design led to reasonable results. In
this way, the development time of new engines can be significantly
reduced. |
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Title: |
Combination of electrocoagulation and flotation technologies in
apparatus for treatment of electroplating wastewater |
Author (s): |
Melnyk O., Kovalenko V., Kotok V. and Kovalenko I. |
Abstract: |
Despite global problems that can affect the world economy (COVID-19,
military conflicts, migration, etc), the world's manufacturing capacity
continues to grow. Inefficient water usage production schemes, an
unacceptable state of water treatment facilities, outdated
material-hungry wastewater processing methods lead to the worsening of
Ukraine's ecological situation. Electroplating manufacturing is among
the biggest industrial water consumers. One of the most dangerous
contaminant is chromium electroplating line. Hexavalent chromium
compounds are classified as Category 1 health hazard. Among numerous
methods for treatment of chromium-containing electroplating waters the
electrochemical method was chosen as the most appropriate. A
fundamentally new technological scheme for the treatment of wastewater
of chromium electroplating manufacturing line, with the underlying
principle of creating closed-circuit resource circulation was developed.
The design of the electrocoagulator was improved by equipping with
special floatation device that helps to prevent the formation of
channels and cavities in the near anode. The ectrofloatocoagulator,
which combines galvanic and electrochemical dissolution of anode and
floatation was tested. The generalized schematic of the advanced
electrochemical process was showed. The proposed scheme includes
electrocoagulation and flotation technologies and allows for water
treatment down to regulated values with minimal power consumption, while
output mud sludge with stable structural characteristics. Laboratory
analysis of obtained precipitate samples, allowed to conclude that based
on chemical inertness of layered double hide oxides, they can be used as
landfill material, secondary raw materials: pellets in metallurgy,
ceramic tiles, bricks, etc. |
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Title: |
Calculation of reactivity with recursive dependence on feedback
temperature |
Author (s): |
Daniel Suescún-Díaz, Geraldyne Ule-Duque and Gilberto Espinosa-Paredes |
Abstract: |
The objective of this work is to calculate the reactivity with feedback
temperature effects by means of the inverse equation of deterministic
point kinetics using the first Bernoulli number in the Euler-Maclaurin
series approximation. The Doppler effect with feedback temperature is
considered, which is recursively calculated from an initial value. To
validate the proposed method, several numerical experiments are carried
out with different time steps, simulation times and forms for the
density of neutron population. |
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Title: |
Study of biogas during fermentation of cattle manure using a stimulating
additive in form of vegetable oil sediment |
Author (s): |
Rogovskii I. L., Polishchuk V. M., Titova L. L., Sivak I. M., Vyhovskyi A. Yu.,
Drahnev S. V. and Voinash S. A. |
Abstract: |
This article presents the design and implementation of an experimental
biogas plant, which consists of a digester with a useful volume of 30 l
and a wet gas tank. The main contribution of this work is the provision
of a new tool in the field of biogas production by controlling the
loading of the substrate into the digester. The substrate is prepared by
mixing a measured amount of cattle manure with water and a
vegetable oil sediment. As a result of the experimental study, it was
established that the rational cycle of the fermentation of cattle manure
is 13-14 days, a mixture of cattle manure and orhanat - 9-10 days.
Biogas output increases with increasing fermentation temperature. For 14
days of fermentation, the average accumulated output of biogas during
the fermentation of cattle manure at a fermentation temperature of 55 °C
is 336 l/kg of dry organic matter (DOM), at a fermentation temperature
of 50 °C is 283 l/kg DOM, 45 °C is 257 l/kg DOM, 40 °C is 184 l/kg DOM.
Cattle manure after feeding livestock with silage and concentrated feed
generates a slightly higher output of biogas compared to cattle manure
after feeding livestock with straw based feed. The total volume of
biogas obtained during the fermentation of the mixture of cattle manure
and orhanat is higher than when the pure cattle manure is fermented. At
the same time, a unit of DOM of pure cattle manure gives a greater
output of biogas compared with a unit of DOM of a mixture of cattle
manure and orhanat. When fermenting a mixture of cattle manure and
orhanat at a temperature of 45 °C, it turns out 195.7 l/kg DOM of
biogas, 45 °C - 175.7 l/kg DOM of biogas. The average calorific value of
biogas obtained during the fermentation of cattle manure is in the range
of 12-17 MJ/m3. The biogas obtained during the fermentation of a mixture
of cattle manure and orhanat does not burn at all at the initial stage
of fermentation (2-5 days). In the next few days, the burning of biogas
is very weak. At the same time in atmosphere of the laboratory room,
there is a persistent smell of hydrogen sulfide. Subsequently,
combustion is normalized and the calorific value of biogas approaches
standard values. |
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Title: |
Conversion of agro-wastes into bio-fertilizer by
Anaerobic digestion for
soil fertility enhancement |
Author (s): |
Majolagbe O. N., Ayandele A., Adebayo E. A. and Omomowo I. O. |
Abstract: |
There is a continuous demand for bio-fertilizer to improve the soil
fertility and increase food production. Wastes were collected from
eateries, food canteens, domestic houses and agricultural outlets. Five
experimental set-ups were made using different combinations of digested
wastes as follows: pig waste (Pw), cassava wastes (Cw), food wastes (Fw);
pig waste + cassava waste (Pw+Cw), pig waste + Food wastes (Pw+Fw). The
slurry of each category of bio-product were prepared by addition of
appropriate volume of water, incubated for 70days with intermittent
agitation at regular intervals in the digester. The principal bacteria
which took the most active role in the bioconversion process were
identified to P. aeruginosa and Bacillus spp. Comparative evaluation of
each of the digested category of slurry combinations showed variations
in their nitrogen content as follows: Pw(1.70± 0.03 mg/100g), Cw
(0.61±0.02mg/100g), Fw (1.96±0.03mg/100g), Pw+Cw (1.20±0.01mg/100g),
Pw+Fw (2.10± 0.02mg/100g). Pw+Fw showed highest K, P and Mg
concentrations as 66.72± 2.36 mg/100g, 143.36± 2.36 mg/100g and
53.34±2.36 mg/100g respectively. The elemental composition in the
increasing order in each of the slurry waste as follows: Cw<Fw< Pw <Pw+Cw<Pw+Fw
There were shifts in the pH which could be due to metabolic activities
and microbial interaction between the soil, other its component and
added digested waste. The best performance in mineral content and plant
growth noticed in Pw+Fw could be due to the nearness to neutrality of
its pH. |
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Title: |
Four-bar mechanism’s rotation center determination using natural
coordinates |
Author (s): |
Neider Nadid Romero, Edwin B. Rua Ramírez and Gonzalo G. Moreno
Contreras |
Abstract: |
In this paper the use of natural coordinates for the analytical
determination of the center of rotation of four-bar mechanisms is
proposed. The natural coordinates are mostly Cartesian coordinates
located in the kinematic pairs or in points of interest of the
mechanism, where the main advantage of their use is that angular
parameters and trigonometric functions can be disregarded, which
facilitates the understanding of the modeling, in addition it is not
necessary to use trigonometric functions. This technique allow to reduce
the computational cost in a great way, optimizing problems where the
rotation center has to be calculated many times. To achieve this goal,
the problem is described and formulated in a robust way using natural
coordinates and operating within the body of complex numbers. Then, to
deal with the present problem, the mechanism’s kinematics position in
natural coordinates is modeled and computing and with the obtained
equations, a program is implemented in MATLAB® to show the curve
described by the rotation centers of links, which is fundamental for the
optimal design of polycentric mechanisms. |
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Title: |
Synthesis polymer styrene butadiene hybrid latex with laponite
organoclay as filler via emulsion polymerization technique for
application in paper coating |
Author (s): |
Bambang Soegijono, Johannes Chanra, Zheng Zhongwu and Puke Mi |
Abstract: |
Synthesis of styrene butadiene hybrid latex was performed via emulsion
polymerization technique using various amount of laponite clay as
filler. Laponite clay was modified with cationic surfactant methyl
triphenylphosphonium bromide (MTPB) with ion exchange technique prior to
polymerization process. The main objective of the modification is to
render the surface of the clay layers to more organophilic. Emulsion
polymerization was performed under semi batch process using 2 L
laboratory stainless steel reactor with temperature 85°C to 90°C for 8
hours. Polymer hybrid styrene butadiene latex was characterized for its
physical and chemical properties with standard ASTM Methods.
Characterization of its binding and printing properties were carried out
with standard testing method (TAPPI Methods) using single coating
formulation on 80 gsm woodfree paper. Polymer hybrid latex based on
styrene and butadiene monomers with laponite clay enhanced binding and
printing properties of coated paper, addition of laponite clay to 6.0wt%
increased the binding resistance of the coated paper two times higher
than pure latex. Reducing binder level become possible for cost saving. |
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Title: |
Research into thermobaric processes of methane gas hydrates formation |
Author (s): |
Volodymyr Bondarenko, Olena Svietkina, Kateryna Sai and Mykhailo
Petlovanyi |
Abstract: |
Based on experimental studies, the paper deals with the dynamics of the
methane gas hydrates formation, influenced by the organized media, such
as surface-active agents (surfactants, SAA), namely, dibutylphenol
treated with ethylene oxide, as well as ethoxylated alcohols. The
stalagmometric method with automatic photoelectronic drops counting, a
conductometric method, a Wheatstone bridge, potentiometer, as well as
laboratory setup with varying thermobaric parameters of the hydrate
formation process are used. The molecular dynamics method and the Monte
Carlo method are applied to the process of methane gas hydrates
formation. New experimental dependences of the gas hydrates formation
have been determined on thermobaric conditions with and without of
organized media. It has been set that under normal conditions of hydrate
formation, the hydrate formation thermobaric curve consists of two
identical dependences, which is caused by formation of the KS-II
structure hydrates with different degrees of filling the crystal lattice
cavities: from 275.0 to 279.2 K - small cavities, and above - larger
ones. When applying a surfactant, water structuring with formation of
immediately large cavities in the gas hydrate crystal lattice are
observed, due to which the methane content in the hydrate increases. It
has been revealed that the gas hydrates formation process occurs
stepwise, by replacing old bonds with new ones with a gradual change in
the coordination number of reacting surface atoms. It has been found
that surface clustering in the presence of organized media facilitates
the gas hydrate formation process by means of micellar catalysis. The
dependences have been determined of the gaseous methane amount contained
in the cluster upon the temperature in the dissociation of obtained gas
hydrate samples. The amount of methane in a unit volume of gas hydrate
has been determined: without adding the surfactant at a maximum pressure
of 18 MPa – 120 m3; by adding the surfactant with the same thermobaric
parameters – 160 m3. |
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Title: |
Virtual environment for smart robotic applications |
Author (s): |
Javier Pinzon-Arenas, Robinson Jimenez-Moreno and Astrid Rubiano |
Abstract: |
This article presents the development of a virtual environment for
testing industrial-type robotic applications, using artificial
intelligence techniques through convolutional neural networks. The
developed environment is made up of two RGB-D cameras for capturing
information from the workspace in which the robot operates, a conveyor
belt and a work table. A ResNet-50 model within a Faster R-CNN is used
to detect a tool, in order to indicate to the robot the position of it,
to generate a pick and place application, from the table to the conveyor
belt, as a method for validating the environment, reaching an average
precision of detection of the object of interest greater than 82% and an
84% success rate on the pick and place task. |
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Title: |
Environmental assessment of the impact of technogenic factors on the
soil mesofauna of the south-east of Kazakhstan and development
bioindicative and indicative factors |
Author (s): |
Z. Tukenova, T. Akylbekova, M. Alimzhanova, K. Ashimuly and A. Saparov |
Abstract: |
A lot of research is devoted to soil fauna, which is especially harmful
on cultivated lands, and its changes with different methods of
cultivating cultivated plants. The patterns of changes in the mesofauna
on the dry and irrigated lands were studied. The experiment, in contrast
to the available works in the scientific literature, will be based on
the study of the impact of technogenic factors on the mesofauna of soils
in southeast Kazakhstan. Studying the soil mesofauna will make it
possible to solve many cardinal problems of systematics, phylogeny,
evolutionary patterns, and other issues of soil zoology. The abundance
and distribution of individual groups of the soil population is
significantly affected by such indicators of the soil environment as the
thickness of the litter and the content of humus in the soil. There is a
tendency to positively correlate the characteristics of soil zoocenosis
with soil moisture. pH and soil temperature, but their influence is
significant only for certain groups of mesofauna, such as earthworms of
the genus Lumbricus, larvae of dessert beetles, weevils and clickers.
The significance of all factors considered is different for different
representatives of soil invertebrates. The results showed accumulation
of heavy metals (Zn, Pb, Cd, Cu) in the soil of southeastern Kazakhstan
(Saimasai village) that cadmium representatives of the soil mesofauna
accumulate in these quantities in the smallest amounts. The revealed
features of the accumulation of HM in soil in the territory of the
village of Saimasai indicate that the lead-zinc association is
characteristic of the residential area, and the lead-cadmium association
is characteristic of Sadovaya and Rysbekov streets, Pb (residential and
Rysbekov) and Cd (Sadovaya) occupy a leading position. The geochemical
series (Kc) of the accumulation of toxic elements of hazard classes 1
and 2 in the soil of the Saimasai village was established: Pb30> Cd20>
Zn15.8> Cu1.7. Thus, the conclusion is made that the absence of the
overall Saimasai soil pollution coefficient (64.5) reflects a high level
of pollution in accordance with the generally accepted gradation of
urban pollution, that is, dangerous levels of pollutants, in particular
heavy metals. |
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Title: |
Fuzzy temperature controller based on Bluetooth low energy for indoor
pet dogs |
Author (s): |
Aaron Don M. Africa and Phil Fredric D. Hermosa |
Abstract: |
Indoor pet dogs have greatly affected our daily lives primarily as our
companions, friends, and a source of entertainment. Ownership of these
pets imposes diligent, consistent, and cognizant of responsibility as
they have rights and needs like human beings. A worrying problem
nowadays is the negligence of regular maintenance and check-ups to
veterinarians that results in the rise of illnesses among pet dogs.
Common ailments by dogs include yeast infection, skin allergies, and a
high fever that can be easily prevented and monitored. This research
paper proposes a methodology to regulate, control, and monitor the
temperature inside a doghouse. The system will be equipped with
temperature, humidity, and proximity sensors as well as a 12VDC fan and
heating element. A fuzzy logic controller will also be implemented to
produce better output response and minimize error rates within the
system. NodeMCU ESP8266 will be utilized as the microcontroller of the
system and is responsible for processing the data and control commands.
Matlab R2019b is used to design and program the fuzzy logic controller.
The proposed research will significantly support the necessary
maintenance and control of the dog’s environment. |
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Title: |
Reflectivity in C-band meteorological radars analyzed with data mining
and neural networks, case study: Radar El Tablazo (Subachoque,
Cundinamarca, Colombia) |
Author (s): |
Julián R. Camargo L., Ernesto Gómez Vargas and César A. Perdomo Ch. |
Abstract: |
This paper shows the analysis of reflectivity data measured by a C-band
weather radar located on El Tablazohill, Subachoque, Cundinamarca
(Colombia), using data mining and fuzzy logic. A decoding of the data
measured by the weather radar was done, and then an analysis of these
data was made using neural networks that are trained with 10 and 20
neurons. In each case, the effectiveness of these networks is tested,
hoping that the neural networks will allow the elimination of the
erroneous information and then normalize it to the scale used according
to the standard. |
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Title: |
Investigation of aerodynamic characteristics of a wind-driven power
plant |
Author (s): |
A. B. Kabanbayev, S. A. Orynbayev and M. Bekmuratov |
Abstract: |
From geographical and meteorological point of view, Kazakhstan is a
favorable country for the use of wind energy, the prospects for the use
of which are determined by the availability of appropriate wind energy
resources. About 50% of the territory of Kazakhstan has an average
annual wind speed of 4-5 m/s, and a number of regions have a wind speed
of 6 m/s or more, which predetermines good opportunities for using wind
energy. The Concept of transition of the Republic of Kazakhstan to
sustainable development for 2007-2024 years suggests that the share of
alternative energy sources should be 5% in the country’s total energy
balance by 2024 [1]. The wind energy is considered not only as an
ecologically “clean” source of energy – the wind energy also supports
socio-economic development, energy security and reduces the dependence
of electricity on fuel prices. Currently, the most widespread are
turbine wind power plants, the working body of which are turbine rotor
blades moving under the action of lifting forces. It is known that
turbine wind power plants have a number of disadvantages, including low
efficiency [2]. Another type of wind power plant is a wind power plant
with a sail in the form of a toroidal shape with an aerodynamic profile.
The aim of this work is to study the characteristics of a wind power
plant with a blade in the form of a toroidal shape in an aerodynamic
tube. |
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Title: |
Available bandwidth estimation metrics as tools to evaluate network
trunk links |
Author (s): |
Dixon Salcedo, Angel Cabajal, Eduardo Gutierrez, Oscar Castro Ernesto
Esmeral, Jesús Urueta, Miguel Rico, Carlos Henriquez, Diana Suarez,
Johan Mardini, Daniel Ortíz, Daniel Bernal and Albeiro Cortes |
Abstract: |
Nowadays the platform par excellence for the development of all
telecommunication activities is the Internet; and its infrastructure is
facing new challenges every day due to the growth in demand for more
content, such as streaming video, storage, and cloud processing. Also,
to maintain optimal levels of service quality, network applications
demand more telecommunication resources. Similarly, the network
infrastructures that support these applications have evolved, and demand
greater and more efficient management of the trunk links, which play a
primary role in sustaining services. Therefore, this paper presents the
performance evaluation of trunk, wired and wireless links in a
heterogeneous computer network infrastructure, using available bandwidth
estimation tools such as IGI, Pathload, and Traceband. Thus, for the
experimental evaluation of the trunk links, two real network scenarios
were implemented, where cross traffic was generated in a synthetic way
using the Mgen tool. Consequently, this study allowed to verify in other
aspects; that the metrics of the estimation tools can be used to
evaluate and know the performance of wired and wireless trunk links,
which can be reliable up to 96% for network administrative tasks. |
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Title: |
Auto-tuning multi-loop digital PID controller using PSoC5LP |
Author (s): |
Julián R. Camargo L., César A. Perdomo Ch. and Oscar D. Flórez C. |
Abstract: |
This paper presents the design and implementation of a multi-loop
digital PID controller that operates with different types of variables,
allowing to centralize the processes in a smaller number of devices
offering better management of them. In addition to having manual tuning,
the digital device includes an independent auto-tuning mode for each
loop, which allows it to be affordable to a greater number of users, all
this making use of a PSoC5LP. |
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Title: |
Quantitative assessment of yield strength
of carbon and low-alloy steels by structure parameters |
Author (s): |
Amangeldy Kanayev and Duman Orynbekov |
Abstract: |
Based
on the analysis of literature data and our own experimental studies, the
contribution of various strengthening mechanisms to the yield strength
of carbon, wheel and low-alloy steels has been quantified. It is
established that for normalized steel (St5ps) the greatest contribution
to the yield strength is made by hard-solution and grain boundary
hardening (37.0 % and 28.0 %), and for low-alloy steel 16G2AF, along
with these hardening components, the role of dispersion hardening (21.4
%) is noticeable. It is shown that thermomechanical treatment of St.5ps
steel leads to the growth of dislocation hardening up to 27.6 % due to
the growth of dislocation density and preservation of most dislocations
in the rolled products at accelerated cooling of hot-deformed austenite.
In wheel steels heat-treated using conventional technology (intermittent
hardening and tempering), grain boundary hardening and dislocation
hardening (31.5; 23.4%, respectively) make a major contribution to the
yield strength. In the same steel, which is treated with surface plasma
hardening, the share of grain boundary hardening in the total yield
strength increases significantly (54.7%) due to strong structure
refinement. |
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Title: |
Pressure and pressure derivative analysis
with inter-reservoir cross flow rate between adjacent reservoir layers |
Author (s): |
Freddy H. Escobar, Daniel Suescún-Díaz and
José Miguel Galindo |
Abstract: |
An
appropriate characterization of a two-layer interconnected system is of
vital importance for reservoir appraisal and administration. In this
work, the TDS Technique is used for the interpretation of transient
pressure test of a two-layer system separated by a low-permeable stratum
so its specific permeability and the permeability of the adjacent layer
can be estimated. The new developed expressions were applied to one
synthetic example when the flow capacity of layer 1 is higher than layer
2. Another simulated example was devoted to the inverted flow capacity
case. The average absolute deviation errors for specific permeability is
lower than 1.2 % and for layer 2 permeability is lower than 0.1 %
demonstrating the accuracy and convenience of the methodology. |
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Title: |
A simulative comparison of BB84 with B92
quantum cryptography protocol |
Author (s): |
Hasanain Abdulhasan Alsreeh, Duaa Hakem
Alabeedy and Saif Uldun Mostfa Kamal |
Abstract: |
Quantum cryptography is a novel technology in which two parties can
secure network communication by applying the phenomena of quantum
physics. In this research, a comparison between BB84 and B92 protocols
will be explained. The simulation results indicate that the B92 protocol
is half efficient the BB84 protocol in the key rate produce with and
without eavesdropping. |
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