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New York Science Journal
(N Y Sci J)
ISSN 1554-0200 (print); ISSN 2375-723X (online),
doi prefix: 10.7537, Monthly
Volume 14 -
Number 6 (Cumulated No. 148); June 25, 2021
Cover
(jpg),
Cover
(pdf),
Introduction,
Contents,
Call for
Papers,
ny1406
The following manuscripts are presented as online first for peer-review, starting from May 28, 2021.
All comments are welcome; you may email us at editor@sciencepub.net, or contact the authors directly.
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CONTENTS
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No.
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Titles /
Authors /Abstracts
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Full Text
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No.
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1
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Temperature Control
of a Steam Condenser using NARMA-L2 Controller
Mustefa Jibril, Messay Tadese,
Nuriye Hassen
Msc, School of Electrical &
Computer Engineering, Dire Dawa Institute of Technology, Dire
Dawa, Ethiopia
mustefa.jibril@ddu.edu.et
Abstract:
This paper investigates the
outlet temperature control for the design of steam condenser.
The comparison has been made for a step drop in the steam
condenser temperature set point using MATLAB/Simulink
environment for the steam condenser with NARMA-L2 using
Levenberg-Marquardt Algorithm and NARMA-L2 using Resilient
Backpropagation Algorithm controllers. The steam condenser with
NARMA-L2 using Levenberg-Marquardt Algorithm controller
presented excellent and superior dynamic performance in response
to the temperature drop in settling time. The overall simulation
results demonstrated that the steam condenser with NARMA-L2
using Levenberg-Marquardt Algorithm controller can be an
efficient alternative to the steam condenser with NARMA-L2 using
Resilient Backpropagation Algorithm controller.
[Kharkwal G, Mehrotra P, Rawat YS.
Taxonomic Diversity of Understorey Vegetation in Kumaun
Himalayan Forests.
N Y Sci J
2021;14(6):1-6].
ISSN
1554-0200 (print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
1.
doi:10.7537/marsnys140621.01.
Keywords:
Steam condenser, NARMA-L2, Levenberg-Marquardt, Resilient
Backpropagation |
Full Text |
1
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2
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Comparison of a
Nonlinear Magnetic Levitation Train Parameters using
Mixed H 2 /H∞ and
Model Reference Controllers
Mustefa Jibril,
Mesay Tadese, Nuriye Hassen
Msc, School of Electrical &
Computer Engineering, Dire Dawa Institute of Technology, Dire
Dawa, Ethiopia
mustefa.jibril@ddu.edu.et
Abstract：To
improve the riding performance and levitation stability of a
high-speed magnetic levitation (maglev) train, a control
strategy based on mixed H 2 /H∞ with regional pole placement and
model-reference controllers are proposed. First, the nonlinear
maglev train model is established, then the proposed system is
designed to observe the movement of a suspension frame, and a
control strategy based on mixed H 2 /H∞ with regional pole
placement and model-reference control method are proposed. Test
and analysis of the proposed system has been done using MATLAB
toolbox for train levitation height, velocity and current
consume. Comparative simulation results show that the mixed H 2
/H∞ with regional pole placement control strategy has a better
performance under the condition of step and random train
levitation height.
[Mustefa
Jibril, Mesay Tadese,
Nuriye Hassen.
Comparison of a
Nonlinear Magnetic Levitation Train Parameters using
Mixed H 2 /H∞ and
Model Reference Controllers.
N Y Sci J
2021;14(6):7-15].
ISSN 1554-0200
(print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
2. doi:10.7537/marsnys140621.02.
Keywords:
Maglev train, Mixed H 2 /H∞ with regional pole placement, Model
reference |
Full Text |
2
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3
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The
Investigation of New Age
Solar Absorption Air-Conditioner Systems
Ehsan Mehrabi
Gohari
Department of
Mechanics Engineering, Iran
mehrabigohariehsan@yahoo.com
Abstract:
Many researchers have studied
the solar absorption air conditioning system in order to make it
economically and technically viable. An Air-Conditioner system
utilizing solar energy would generally be more efficient, cost
wise, if it was used to provide both heating and cooling
requirements in the building it serves. But still, much more
research in this area is needed. This paper will help many
researchers working in this area and provide them with
fundamental science on absorption systems, and a detailed review
on the past efforts in the field of solar absorption cooling
systems with the absorption pair of lithium-bromide and water.
Various solar powered heating systems have been tested
extensively, but solar powered air conditioning systems have
received very little attention. Solar powered absorption cooling
systems can serve both heating and cooling requirements in the
building it serves. This science will help them to start the
parametric study in order to investigate the effect of key
parameters on the overall system performance.
[Ehsan
Mehrabi Gohar.
The
Investigation of New Age
Solar Absorption Air-Conditioner Systems.
N Y Sci J
2021;14(6):16-21].
ISSN
1554-0200 (print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
3.
doi:10.7537/marsnys140621.03.
Keywords:
solar absorption, Air-Conditioner systems, cooling systems,
lithium-bromide |
Full Text |
3
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4
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Soft
Skills:
A Professional Development
Curriculum
to Enhance the Employability
of Engineering Students
Ezhilan S1,
Renuga M2
1.
Professor of English, Jayam College of Engineering and
Technology, Dharmapuri 636 813, TN, India
Tel:+91
9443563888, E-Mail:
profezhilan@gmail.com
2.
Professor of English and Head of Languages and Sciences, Sona
College of Technology, Salem, TN, India
Tel:+91 9843682314, E-Mail:
mrenuravi@gmail.com
Abstract:
The issue of employability of engineering students has become
very serious in many countries including India. Employers are
demanding employees that are able to transform knowledge and
skills learnt in successful workplace and they are concerned
about soft skills. Though the standard of academia has been
steadily moving ahead, the updating process of
curriculum
with respect to soft skills is not as fast as expected by the
industries.
The authors survey
the essential features of soft skills that need to be modified
in the curricula of engineering, pedagogy,
role of the teachers and evaluation with the perspective of the
industries.
[Ezhilan
S, Renuga M. Soft Skills:
A Professional Development
Curriculum
to Enhance the Employability
of Engineering Students.
Life Sci J
2021.14(6):22-39](ISSN: 1097-8135).
http://www.lifesciencesite.com.
4.
doi:10.7537/marsnys140621.04.
Keywords:
soft
skills,
employability, curriculum, training, evaluation |
Full Text |
4
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5
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Sheet fracture prediction in
multi-point deep drawing process using ductile fracture criteria
1Babak
Beglarzadeh, 2Behnam Davoodi
1Department of Mechanical of
Engineering ,Science and Research branch, Islamic Azad
university, Tehran, Iran
2Department of Manufacturing
Engineering, Faculty of Mechanical Engineering, University of
Tabriz, Tabriz, Iran.
Abstract：Multi-point
forming is a flexible manufacturing method for 3-D surfaces.
It’s basic idea is to divide an entire die into many punches
which can be arranged and adjusted precisely. These punches
constitute a “configurable multi-point die”. due to the deep
drawing process of sheet metal forming methods most used in
various industries, In this paper the procedure of multi-point
forming for deep drawing of sheet metal parts has been studied
and the forming mechanism proposed in the experimental and
finite element simulation has been reviewed. In view of the
widespread use of aluminum alloy AA2024 in the Aerospace
Industry, this alloy sheet material has been used for testing
and forming parts in various conditions. Common flaws with the
process suggested by conventional deep drawing process and those
of this specific method potential has been identified and
appropriate strategies to address these deficiencies has been
provided. Ductile fracture criteria are used for predicting the
tearing of sheet. In addition, the influence of forming
parameters such as the material and the thickness of the elastic
layer, Sheet material etc, on the process, defects and the final
quality of the formed parts will be studied. The results show
that deep drawing process with multi-point die is a flexibale
procedure compared with conventional deep drawing process. This
method can be formed more complex profiles with multiple pins
and elastic layer while it is not possible in conventional deep
drawing. In this procedure, by increasing the stiffness of the
polyurethane layer, blank-holder force increases and the amount
of dimples reduced. In general, in this method, with increasing
of polyurethane layer stiffness, drawing depth of the
workpiece increases. Based on the ductile fracture criteria such
as Cockroft - Lathm and Clift, the elements that related to the
Clift criteria, rupture earlier.
[Babak
Beglarzadeh, Behnam Davoodi.
Sheet fracture prediction in
multi-point deep drawing process using ductile
fracture criteria.
Life Sci J
2021.14(6):40-46]
(ISSN:1097-8135).
http://www.lifesciencesite.com.
5.
doi:10.7537/marsnys140621.05.
Keywords:
finite element simulation, deep drawing, sheet parts, multi
point forming, ductile fracture criteria. |
Full Text |
5
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6
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Spatial and Structural Features of Domes in the Iranian
Architecture
Alireza Sahraeian,
Arsalan Korooni
Master of Architecture, Bam Branch, Islamic Azad University,
Bam, Iran
Abstract：Dome is an Iranian
construct to which various issues such as their emergence and
distinction from domes constructed in other countries, forms
difference, process and structural systems, construct
resistance, and theoretical bases pertaining to the origin of
magnificence and beauty have been allocated. This paper aims at
investigating briefly the physical form and its effect on
recognition of different domes and studying Iranian domes in
terms of structure and presenting case examples among
traditional domes in Iran and the impact of developments on
construct design and implementation in the Iranian domes. In the
end, it regards domes as an example of Iranian Islamic art in
the Iranian traditional architecture arena and it has endeavored
to take a stride, even short, in preserving and introducing the
embodiment of magnificence and preventing it from
fading into oblivion.
[Alireza
Sahraeian,
Arsalan Korooni.
Spatial and
Structural Features of Domes in the Iranian Architecture.
Life Sci J
2021.14(6):47-58] (ISSN:1097-8135).
10.7537/marsnys140621.06.
6. doi：http://www.lifesciencesite.com.
Key words: Iranian
architecture, dome, physical form, domes structure. |
Full Text |
6
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7
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Water Quality and Macroinvertebrates Assessment of Hadejia–Nguru
Wetlands in Jigawa and Yobe States, Nigeria.
*1Bate,
Garba Barde and 2George Ubong Uwem
*1
Department of Environmental Science, Federal University Dutse,
Jigawa state, Nigeria
2Department
of Fisheries & Aquaculture, Akwa Ibom State University, Obio
Akpa Campus, Akwa Ibom State, Nigeria
Email:
bategarba@yahoo.com
Abstract：Arithmetic water
quality index and Macroinvertebrates’ family biotic index of
Hadejia–Nguru wetlands in Jigawa and Yobe states of Nigeria were
determined. Four sampling locations labeled L1, L2,
L3 and L4 and a control location labeled LC
were chosen.
Water samples were collected using
plastic containers that were washed with water and detergent,
soaked in 10%
HNO3 while Macroinvertebrates were
collected using a Van Veen grab sampler. Temperature, pH, DO and
Electrical conductivity were measured in–situ using a Seabird
Scientific Hydrocycle (DS5X) portable meter
while total suspended solids,
total dissolved solids,
BOD5,
Sulphate, Nitrates, Ca and Mg were determined using standard
methods. Macroinvertebrates were identified to the lowest
possible taxonomic level using identification keys. Analysis of
variance was used to compute the differences in physicochemical
parameters and macroinvertebrates’ values among sampling
locations. The results obtained for physicochemical parameters
showed highest and lowest pH as 6.63±0.41and 5.08 ± 0.76 in LC
and L1 respectively, DO levels were
lowest (4.50 ± 0.51 mg/l) in L1 and highest
(5.28±0.37 mg/l) in LC while highest and
lowest BOD levels were 7.64 ± 1.67 mg/l and 5.85±1.59 in L4
and LC respectively. The physicochemical
parameters generally exceeded the WHO limits with control
location having lower measurements though there was no
significant difference (P>0.05). A total of 329 individual
macroinvertebrates were identified in all the sampling locations
belonging to three phyla, five classes, 10 orders and 13
families with different pollution tolerance levels. The weighted
Arithmetic water quality index showed an order: L1>L2>L3>L4>LC
with the highest and lowest being
6507.15 and 936.96 respectively
while the macroinvertebrates’ family biotic index followed same
pattern with the highest (5.56) in L1 and lowest
(4.49) in LC indicating high degree of organic
contamination making the water unfit for human use.
[Bate, Garba Barde and George Ubong
Uwem, Water Quality and Macroinvertebrates Assessment of
Hadejia–Nguru Wetlands in Jigawa and Yobe States, Nigeria. N
Y Sci J
2021;14(6):59-66].
ISSN 1554-0200 (print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
7.
doi:10.7537/marsnys140621.07.
Keywords:
Hadejia–Nguru wetlands, Water quality index, Ramsar site,
Macroinvertebrates, Family biotic index, Physicochemical
parameters |
Full Text |
7
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The manuscripts in
this issue were presented as online first for peer-review,
starting from May 28, 2021.
All comments are
welcome: newyorksci@sciencepub.net.
For back issues of the
New York
Science Journal, click
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