Experimental Analysis of Crack Effect on Stresses in Pipes
Sakhi Jan, Rafiullah khan , Sajjad Ahmad, Muhammad Amjad, Saeed badshah
Sch J Eng Tech | 61-65
DOI : 10.36347/sjet
Abstract
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This paper experimentally investigates the effect of crack size on the stresses in pipes. Tensile test specimens
with and without cracks were tested in universal testing machine. The load and the displacement were monitored during
testing. The results show that the strength of the pipe was decreased w.r.t crack size with a power trend. The elongation
until failure also shows a similar trend. The failure of the specimens with cracks occurs at the crack position.
Design of Transmitter and Receiver to Reduce ISI in Multi-Carrier CDMA System
Suman, E.r. Rishipal, Arun Kumar, Manisha Gupta
Sch J Eng Tech | 5-8
DOI : 10.36347/sjet
Abstract
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In this paper we have consider a MC-CDMA where Inter-symbol interference is one of the biggest problem
when the system is subjected in Awgn and Rayleigh Channel. Here we have considered the efficient Transmitter and
Receiver to reduce the inter-symbol Interference without considering the use of equalizer. When the number of users gets
large, each user tends to choose more than one carrier, which do not suffer deep fading, while interference suppression is
performed across the chosen carriers by the corresponding receiver. Results have shown that with efficient equalizer the
inter-symbol interference can be reduced.
Effects of Pre-Treatment on Drying Rate and Protein Content of Yam Slices
T. W. Owa, L A S Agbetoye, R O Akinbamowo
Sch J Eng Tech | 1-4
DOI : 10.36347/sjet
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An experiment to evaluate the drying rate of pretreated yam slices at varying temperatures was conducted at
the Federal University of Technology, Akure. The yam slices were subjected to blanching by soaking in hot water at
temperatures of 800C, 900C and 1000C for 10 minutes and later dried in a cabinet type dryer fitted with an electric heater.
The drying process was done at three levels of temperatures (1000C, 1100C, 1200C) and time (4hrs, 5hrs and 6hrs). The
experimental results show that the blanching temperature have significant effect on both the drying rate and protein
content at 5 level of significance It was also observed from the result of the analysis that samples blanched at 800C had
the highest rate of water loss and protein content when compared to other treatments. The least values of drying rate was
obtained at the 900 C blanching temperature.
Utilization of Waste Plastic Materials as Bitumen-Blends for Road Construction in Oman
Sukaina Kazmi, Dubasi Govardhana Rao
Sch J Eng Tech | 9-13
DOI : 10.36347/sjet
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Studies are reported in the present work to focus on blending of waste plastic materials (in the form of
shredded polyethylene bags) being used as a binding agent in asphalt for road construction. This study compared the
results with the standards set by Oman as per MOTC (Ministry of Transportation & Communications) guidelines for
asphalt as a road laying material. Polyethylene was used as a binding agent along with bitumen (60/70) grade and dolerite
as the aggregate material. The studies showed that not only did the road become a receptacle for plastic waste, but it also
had a better strength and durability which were verified by determining the bulk density, stability test, flow test and the
density and voids analysis. The experiments have showed that 9 % of low density polyethylene to be an effective binder
proportion of polyethylene by weight of bitumen which were in agreement with previous studies. With a stability value
of 1590.2 kg, it was 32.5% greater than the standard of a minimum 1200kg; and a flow value of 2.9-3.0 mm was well
within the required range. The specific gravity of the material was 2.446. The VMA (voids in mineral aggregate) was 5%
while the given range was 4-7%, and the air voids were up to 66.7% showing that it was well within the standard range
of 50-70% as per MOTC standards.
The Effects of Iron-Ore Tailings on Setting Times of Some Commercial Cement
Bolarinwa Gabriel. Oladeji, Aniki AbimbolaOlorunsogo, Farounbi Joan Ajibike, Aduloju Sunday Christopher
Sch J Eng Tech | 14-20
DOI : 10.36347/sjet
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This work assessed three types of cement available commercially in terms of strength, porosity, setting and so
on to prevent dangers waste of resources and to minimize cost of construction and if such similar commercial cements
are mixed with iron-ore tailings. Burham, Dangote and Elephant cement were investigated to ascertain their setting times
(both final and initial) using the Vicat apparatus. Iron-ores tailings which is amounting to several tonnes in piles which
can in the future, lead to disposal problems was used as additives on these cements. The result shows that the tailings
have positive effect on the setting times of the tested cements. Future work will address the contents of tailings which
when added would provide the maximum benefit and also the effect on the compressive strength.
Optimal Cross-Layer Routing in 802.16 Mesh Networks With Different Classes of Service
Yevsyeyeva Oksana, Al-AzzawiEssaMohammed
Sch J Eng Tech | 21-32
DOI : 10.36347/sjet
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Permanent interest in wireless mesh networks can be explained by their fast and easy deployment, selfconfiguring, self-healing, and large covered area. Substantially the advantages are related to possibility of every meshstation to work as end- terminal and as transit node at same time. In turn the capability gives rise to set of problems one
from which is routing. In order to improve network efficiency and in compliance with next generation network’s concept
routing must be optimal, adaptive, QoS-based and take into account underlying link layer. Whereas IEEE 802.16mesh
networks are based on TDMA/OFDM the routing problem must be solved jointly with slot allocation. The article offers
dynamic mathematical model of IEEE 802.16 mesh network in space of state that allows to formulate cross-layer routing
as constrained optimization problem taking into account requirements to bandwidth and delay of traffic delivery. Model
is aimed at slot reuse and multipath forwarding. As a result it allow to improve network productivity up on 30-100%
legacy single path delivering.
Applying Clustering Technique into the Earthquake Analysis at Taiwan
I-ChingYang, Chun-Nan Lin, Wen-Kuei Hung, Jann-Yenq Liu, Kun-Lin Hsieh
Sch J Eng Tech | 33-36
DOI : 10.36347/sjet
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As we known, earthquake (EQs) prediction had been mentioned as an important issue to many countries. In
this paper, we proposed an approach to find out the events of large earthquakes from the time series data of GPS total
electron content (GPS TEC) by using clustering analysis. To search for possible precursors before earthquake occurring
in a large area, the GPS TEC of the global ionosphere map (GIM), which is routinely published in a 2hr time interval for
monitoring global ionospheric weather, reported at the Center for Orbit Determination in Europe (CODE) is used in this
study. And, an illustrative case at Taiwan is also used to denote the feasiblilty of the proposed approach.
Curbing Truancy and Impersonation in an Educational Institution Using Fingerprint Biometric: A Study of Ogun State Institute of Technology, Igbesa.
Ojo, Abosede Ibironke, Ojo, Matthias Olufemi Dada, Oladejo Rachel Adefunke
Sch J Eng Tech | 37-41
DOI : 10.36347/sjet
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This study applied the use of biometric (finger print) in curbing truancy and impersonation among the staff of
an Educational Tertiary Institution. It implements an UML-Use Case Diagram. Goal of the content, Scope of the
System, the Actors, the Staff, Register, Staff Enrolment, Log In, Finger print Page and the Administrator were the
components in the System, implemented. It also explained the principle involved in the implementation of Biometrics.
The study concluded that truancy and implementation affects the rate of productivity and created unnecessary
irregularities in the work place. The application of finger print Biometrics would, undoubtedly, curb the problems of
truancy and impersonation in work place. It is recommended that every Nigerian Organization i.e. Manufacturing
Industries, Companies, and Government Ministries should begin to apply finger print Biometric to curb the problems of
truancy and impersonation in their places of work.
Improved approximation of PERT activity parameters and validation
V. Sireesha, N.Ravi Shankar
Sch J Eng Tech | 55-60
DOI : 10.36347/sjet
Abstract
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In Project Evaluation and Review Technique (PERT) , the activity mean and variance are very useful to find
the expected project duration and variance of the critical path. Project duration makes a large difference in the economic
aspects of the project. Assuming activity durations in a project are beta distributed, new estimates of mean and variance
of activity duration are derived. It is observed that the estimated mean is more moderate and the estimated variance is
more conservative compared to other estimates of beta distribution. It is observed that, the new time estimates overcomes
the problem of optimistic planning.
Voice Activated Electronic Devices Control System For Home Appliances
Khaled Mahmud, Dr. Md. Mahbubul Alam Joarder, Anal Kanti Roy
Sch J Eng Tech | 66-70
DOI : 10.36347/sjet
Abstract
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Peripheral is the electronic equipment connected by cable to the CPU of a computer. Today the art of
computer science lies in connecting computers with peripherals. In many circumstances, it looks more like magic than
art. Due to the rapid technological development in computer, the speed and capacity of computer system have increased
very much. So, it is possible to connect many peripherals with computer system and can satisfy the most computing
needs. Now-a-days Computers are widely used in home, offices, institutions and many other different places. People
have started to use computer to control their home appliances like television, fan, refrigerator etc. One can also view the
status of these devices from remote places with the help of computer system. It is possible to design many methodologies
to control the home appliances for comfortable use of these electronics. In this paper, we have designed and implemented
an idea of controlling home appliances using voice command. We developed a control system by means of natural voice
technology for advanced electrical and other household electronic instruments such as safety and comfort systems (light,
fan), entertainment and leisure items (television) and the services associated with them.
Opinion Mining and Sentiment Analysis in Data Mining
Pragati Vaidya
Sch J Eng Tech | 71-75
DOI : 10.36347/sjet
Abstract
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An essential part of our information-gathering behavior has constantly been to discover ―what other people
think‖. With the explosion of Web 2.0 platforms such as blogs, discussion forums, peer-to-peer networks, and various
other types of social media and actively use information technologies to find and appreciate the opinions of others. This
paper covers techniques that ability to directly facilitate opinion-oriented information-seeking systems and complete
workflow of Opinion mining and sentiment analysis in which those techniques can be implement and also discusses
about the application of opinion mining and sentiment analysis and discuss about tools through which are used to track
the opinion or polarity from the user generated contents.
Variable Rotational Speed Influence to Internal Flow Field of Electric Submersible Pump with CFD
Hui-bin GU, Ye YUAN, Huan-huan DING
Sch J Eng Tech | 76-79
DOI : 10.36347/sjet
Abstract
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To study the impact of variable speed operation to electric submersible pump internal flow field, the fluid
dynamics numerical simulation for impeller passages is accomplished under five kinds of rotational speed. The results
show that: with the rotational speed increased, the fluid static pressure is gradually increased from inlet to outlet of
impeller flow passages. The impeller flow passages internal fluid flows to the periphery under the action of centrifugal
force, so impeller center pressure decreased. When the fluid just flows into the flow passages, the relative velocity is
small, the fluid relative velocity along radial direction of the impeller is gradually increased, reaching the maximum at
impeller outlet, and the outlet flow velocity is also increased with the increased rotational speed. The revealed of the
impact of variable speed operation on electric submersible pump internal flow rule, and provides theoretical basis for
pump retrofit optimal design.
Usage of PZTs for Damage Evaluation of Steel Reinforcing Bar
Costas P. Providakis, Chris G. Karayannis, Constantin E. Chalioris, Maria J. Favvata, Georgia M. Angeli, Nikos A. Papadopoulos
Sch J Eng Tech | 80-93
DOI : 10.36347/sjet
Abstract
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This study presents an effort for the damage assessment of reinforcing bars using bonded piezoelectric
transducers and the implementation of an integration approach based on the electromechanical admittance method. The
damage is the result of excessive elongation of the bar due to yielding caused by flexural deformation of are in forced
concrete element or by local steel corrosion and it is simulated considering reduced bar diameter along the damaged part
of its length. Test measurements of healthy and artificially damaged steel bars have been conducted using the developed
monitoring system. The experimental program comprises data acquisition of current density curves for healthy and
damaged bars as detected by the test instrumentation and implementation of the adopted admittance-based procedure to
evaluate damages at different levels. Analytical simulations of the same healthy and damaged bars have also been carried
out using the finite element software COMSOL. It was found that the sensitivity of the piezoelectric transducers greatly
depends on the selection of the excitation frequencies. Current density and admittance curves demonstrated discrepancies
between the response of the healthy and the damage states. Admittance signatures showed a clear gradation of the
examined damage levels.
Encryption Method of Gray Image Based on BP Neural Network
Lili Wang, Xincheng Gao
Sch J Eng Tech | 94-97
DOI : 10.36347/sjet
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At present, the problem that exists in the gray image encryption is easy to be cracked. Aiming at it, this paper
proposes a kind of encryption method based on BP neural network. This method uses the very strong nonlinear transform
ability of neural network to improve the security of image information. This paper detailed describes the specific
implementation process of encryption method based on BP neural network. Through the simulation experiment, good
results have been achieved
Hydrochemical characterization of Katana thermals waters, Lake Kivu watershed
Bagalwa M. L, Bagalwa M. J. J, Karume K
Sch J Eng Tech | 98-103
DOI : 10.36347/sjet
Abstract
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Thermal water springs are considered to be important natural sources. Studies was done in the region
concerning the geology, geophysics, hydrochemistry but no was concentrated on the hydro-chemical characteristics of
thermal water in Katana region. A large number of chemical analysis of Katana thermal spring waters were evaluated in
order to identify the major chemical characteristics and investigate the origin of thermal waters. This could demonstrate
the hydrochemical homogeneity or diversity at the scale of the region and the possibilities of deep the same flows waters.
Water sample was collected from the different thermal springs of Katana region for 3 years (July 2006, July 2008 and
July 2010) and analyzed for temperature and pH in situ, Total Suspended Sediment, Alkalinity, Total hardness, Calcium
hardness, magnesium hardness, bicarbonate, sulfate, chloride, Total phosphorus, total nitrogen, ammonia and nitrate.
Piper Diagram, in which major cations and major anions was plotted on ternary diagrams in order to illustrate which
cations and anions dominate. The physic-chemical parameters of the thermal water in Katana region varied from one
spring to another. The variation of temperature of the springs was not significant (F= 0.1902; p = 0.833) during the study
period. The high values when until to 70 °C in same springs at Kankule.
