|
ARPN Journal of Engineering and
Applied Sciences November 2017 | Vol. 12 No. 21 |
|
|
Title: |
Critical study of sub-surface aquifer layer for groundwater availability
based on electrical resistivity survey: A part of Dhalai Tripura, India |
Author (s): |
Jayanta Debbarma, Sanchaita Das, Chandra Debbarma, Malabika Biswas Roy
and Pankaj Kumar Roy |
Abstract: |
In Tripura, there are many rivers and most of the rivers are almost dry
due to high amount of silt carries from higher altitude and deposits as
well at river bed. Thus quantitative as well qualitative results of
surface water is not the sustainable resource for supplying for the
different stakeholder and thus groundwater has the alternative source to
meet the demand for the high density population in the state like
Tripura. Dhalai Tripura located in the north east state of India has a
good amount of coarse sand for groundwater development dependent. A
critical study is undertaken to assess the groundwater availability in
the sub-surface aquifer using vertical electrical sounding (VES) survey
at nineteen locations with a total of thirty eight points spread over
the area. The study results depict resistivity values ranging between 30
ohm and 150 ohm are found to be good aquifer zone with the thickness
varied between 36 m and 44 m. Thus it concludes VES survey could be an
alternative method to assess the groundwater potential at present and
future scenario by reducing the overall project cost and also to reduce
the chances of failure for making bore well in the same or nearby
critical areas for all stakeholders. |
|
|
Full Text |
|
|
Title: |
Distributed Environment: Security mechanism design structure and
security implementation for data distribution |
Author (s): |
Jai Pratap Dixit, Neelendra Badal and Syed Qamar Abbas |
Abstract: |
Distributed Environment is that can evolve their different behaviors
based on their changes in data distribution area. In this paper, we
discuss security mechanism design issues and propose security metrics
issues also in the context of distributed environment. A key premise
with design layouts of distributed environment is that in order to
detect their changes, authentication and information must be collected
by different approaches of monitoring in environment. How design
approaches should be done, what steps should be monitored, and the
impact of monitoring may have on the security mechanism of the design
issues in target system need for carefully considered. Conversely, the
impact of security mechanism design layouts on the securing of data
distribution environment. We propose a different design issues in
security metrics that can be used to quantify the impact of different
monitoring on the distributed security mechanism issues of the target
distributed environment. |
|
|
Full Text |
|
|
Title: |
Study of Dimple Texture wear characteristics by experimental method
|
Author (s): |
Shiva Rahul Tummala and Arasu |
Abstract: |
Various approaches has been proposed in order to improve tribological
behavior, some of which are lubrication, coating, and surface
modification such as texturing, which is the center of attention of this
work. Dimple Texture Forming is the proposed area of study. Dimple
Texture Forming in friction pairs is one of the wear reduction
techniques. In most of the contact mechanisms, the materials chosen for
two contacting parts are different; the reason behind this is wear
happens on both the parts since they are of same material. For example,
in case of shaft and bearing, it is difficult to replace the shaft since
it is cost effective, whereas bearing can be replaced easily; so shaft
is made of different material compared to bearing. But if we can use
dimples texturing on any of the mating parts, same material can be used
for both the contacting parts, and this is the main area of study in
this work. By texturing the surface with Dimples, the value of surface
roughness throughout the surface remains constant at peak; this
eliminates the surface roughness variations on the surface of an
un-textured surface, since it will be peak only at some places and
varies throughout. In this work, different geometries of the Spherical
and Elliptical Dimple Textures were formed using Laser Surface
Texturing. The tribological performance of the sliding pair mainly
depends on shape geometry and density of the patterned micro-texture
features (dimples). The effect of these micro-dimples on friction
properties were experimented by using Pin on Disc Tribometer ASTM G99
for a Brass disc mated with Brass pin (same material for both pin and
disc). Concurrently, Un-textured surface frictional properties were also
tested using Pin on Disc Tribometer ASTM G99. Compared to a smooth
surface without texturing, some textured surfaces successfully indicated
the Reduction of coefficient of Friction. Spherical dimples with 150
microns diameter and 75 micron depth provided the minimum coefficient of
friction from the experiments. There was valid evidence proving that
dimple shape and geometry was the optimum texturing solution to increase
tribological properties. Results also indicted that optimum texture
density might exist at which the surface shows the best Friction and
Wear behavior. |
|
|
Full Text |
|
|
Title: |
Electronic and optical properties of Bi2Se3 topological insulator:
A
promising absorbing layer for broadband photodetection |
Author (s): |
Abdullahi Lawal, A. Shaari R. Ahmed and Norshila Jarkoni |
Abstract: |
Bismuth selenide (Bi2Se3) is a van der Waals compound which has been
excellently reported as thermoelectric material. Linear dispersion near
Fermi energy level is an exciting feature to consider, a promising
candidate for photonic device within broadband wavelengths. For this
application, detailed knowledge of its structural, electronic and
optical properties is very essential. The electronic properties were
determined by density functional theory (DFT) calculations implemented
in Quantum-Espresso simulation package which uses plane wave basis and
pseudopotential for the core electrons. Optical properties are computed
by solving Bethe-Salpeter equation of many-body perturbation theory (MBPT)
as implemented in Yambo code. The band structure results show the semi
conducting behavior of Bi2Se3. Taken into account the effects of
electron-hole interaction by solving Bethe-Salpeter equation, the
calculated optical properties are in better agreement with available
experimental results. The exciton energy shows that the title material
can absorb light within infrared region. |
|
|
Full Text |
|
|
Title: |
Investigation of process parameters on electrochemical micro machining
of Cu-Zn-Sn alloy |
Author (s): |
N. Jayakumar, R. Rajavel, A. R. Sivaram, P. Ramanathan and K. Srividhya |
Abstract: |
Electrochemical micro machining (EMM) is one among the advanced
manufacturing techniques to drill holes of minute sizes, especially
drilling holes with a diameter of below 1 mm. EMM offers quite a few
advantages that include superior machining rate, enhanced precision and
control and a wider group of materials that can be machined. These are
pretty tough to accomplish through conventional machining process. In
this investigation, parametric study of EMM was conducted to congregate
the requirements of proficient micromachining. Machining voltage,
Electrolyte concentration, and Pulse on time are the key process
parameters that are significant for EMM. Performance of micro machining
was observed during material removal rate (MRR) and over cut. The outcome
of this examination illustrated that machining voltage and electrolyte
concentrations are very important in affecting the performance
characteristics. |
|
|
Full Text |
|
|
Title: |
Optimal speed control based on adaptive second order sliding mode and
modified HSC MPPT algorithm for wind turbines |
Author (s): |
Morad Hafiane, Jalal Sabor and Mohammed Taleb |
Abstract: |
Accurate control of the wind turbine at its optimal rotational speed for
a given wind speed is required to extract maximum power from the wind
turbine generator system in the absence of aerodynamic pitch control.
Due to inherent wind turbine nonlinearities and unpredictable wind speed
fluctuations, precise control is a difficult task to undertake. This
paper presents a command strategy of doubly fed induction generator (DFIG)
which based on a maximum power point tracking (MPPT) algorithm with a
modified Hill Climb Searching (HCS) and a sliding mode controller with
adaptive twisting algorithm in order to achieve accurate tracking under
the wind turbine’s nonlinear dynamics and fast wind changes. Simulation
results for different situations highlight the performance of the
proposed strategy under various wind speed operating conditions. |
|
|
Full Text |
|
|
Title: |
The role of TiC on the hardness and wear resistance of AA 7075 using GTA |
Author (s): |
R. Prashanth, A. Shanmugasundaram, J. Abhinavaram, S. Jagadeesh, Sanjivi
Arul and R. Sellamuthu |
Abstract: |
The main objective of this study is to improve the hardness and wear
resistance of AA 7075 by reinforcing Titanium Carbide (TiC) particles
onto the aluminium alloy surface using Gas Tungsten Arc (GTA) as a heat
source. Based on the number of trails, optimum GTA heat source
parameters are finalized with reference to the proper fusion of base
metal. After TiC is deposited onto the surface, three step post-weld
heat treatment (PWHT) was employed to improve the hardness and wear
resistance. The material was solution treated followed by water
quenching and artificially aged. The Dry sliding wear tests were
conducted using a pin on disc wear testing equipment and the wear rates
were calculated by using weight loss method. An inverse relationship was
found between wear rate and hardness. The increase in the microhardness
was found to be 33 %. The wear rate increased with increase in the load
but reduced with respect to increasing sliding velocity. The variation
of COF with hardness was found to be almost constant. A detailed
material characterization of as received AA 7075, after TiC
reinforcement and after heat treating AA 7075 substrate was done using
Scanning Electron Microscope (SEM), line - Energy dispersive X - ray
spectrometry (Line-EDX) and X-ray diffraction (XRD) techniques. |
|
|
Full Text |
|
|
Title: |
Experimental studies on Sisal Fibre Reinforced concrete with
Groundnut
Shell Ash |
Author (s): |
Kanchidurai S., Nanthini T. and Jai Shankar P. |
Abstract: |
Fibre reinforcement usually increases the performance of the concrete in
many aspects, this paper deal addition of Sisal Fibre Reinforcement
(SFR) in concrete to improve the performance at the same time reducing
cement consumption by replacing with Groundnut Shell Ash (GSA). These
materials not just lessen the emanation of carbon dioxide gas in the
climate additionally utilized as a substitute for the bond to take care
without bounds demand. In the present work, GSA replacement for cement
is 0, 5, 10, 15 and 20%; SFR is added for each set percentage of GSA as
1, 2 and 3% by its weight. Na2CO3 treatment was carried out to reduce
the potential deterioration of SF. The compressive strength, flexural
bending strength, deflection of the beam and economic consideration for
M25 concrete specimen was done. Totally 120 numbers concrete 150 x150 mm
cube and 9 number of 100 x 150 x 800mm flexural member cast and tested.
It is recommended up to 10% of replacement of cement by GSA and 2 %
addition of SF provide optimum values from investigation and economic
consideration. |
|
|
Full Text |
|
|
Title: |
ICI cancellation using normalized minimum mean square error in MIMO-OFDM
systems |
Author (s): |
R. Santhakumar and N. Amutha Prabha |
Abstract: |
Today’s world emerges with wireless communication technology. The
network performance can be improved by using efficient signalling and
receiver techniques to increases the data rate. As the data rate
increases, the occurrence off channel interference is high. The channel
estimator is preferred to detect and reduce the interference. Multi
Input Multi Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM)
is implemented to enhance the high speed data transmission and to
achieve high spectral efficiency. During signal transmission, the
performance degradation caused due to inter carrier interference (ICI).
To overcome the ICI, Normalized Minimum Mean Square Error (NMMSE)
channel estimator provides high signal receiver rate and low bit error
rate with less delay. The performance achievable rate increases and
reduces channel attenuation. It also proved that the channel overhead is
low due to high bandwidth at receiving end compared with the
conventional estimators. |
|
|
Full Text |
|
|
Title: |
Transverse slab reinforcement design of concrete bridge deck: A review |
Author (s): |
Najiyu abubakar, Redzuan Bin Abdullah, Ahmad Beng Hong Kueh and Mohamad
Salleh Yassin |
Abstract: |
This paper reviews the current design practices of transverse slab
reinforcement design in concrete bridge deck, which consist of concrete
deck slab on wide concrete T-beam. The conventional bridge design method
results in the provision of excessive transvers steel reinforcement in
the concrete bridge deck slab due to the fact that, the slab is assumed
to bear the applied vehicular loadings alone without considering the
contribution of the wide T-beam flanges. Thus, the design which is based
on bending and failure proved to be too conservative. Through critical
review, issues regarding some design approaches were discussed. It has
been found that, designing the deck slab in transverse direction would
enable the vehicle wheel loads to be supported by the wide T- beam
flange and performance enhancement can be achieved by compressive
membrane action resulted from the natural stiffness of the wide girder
flanges. The presence of this membrane forces provides a punching shear
capacity, which is far beyond the flexural design capacity for the new
bridge deck system. This capacity would result in substantial reduction
of the transverse reinforcement within the slab. |
|
|
Full Text |
|
|
Title: |
Integrating SSSC with variable structure observer based optimal
controller for damping frequency oscillations of deregulated power
system |
Author (s): |
A. Ganga Dinesh Kumar and N. V. Ramana |
Abstract: |
In this paper design of integrated static synchronous series capacitor (SSSC)
and variable structure system observer (VSSO) based optimal controller
for damping of frequency oscillations in Multi Area Power System (MAPS)
under deregulated environment is presented. A Thermal-Thermal power
system is considered for simulation study. SSSC is a series connecting
device which is connected with tie line of the system. The low frequency
oscillations of system are minimized by designing the gain of SSSC. The
high frequency oscillations are minimized by designing observer based
optimal controller. The design of VSSO matrix is a function of
transformed System matrix obtained from optimal sliding mode control
law. The performance of deregulated system with integrated control
strategy (SSSC+ VSSO based Controller) is tested and simulation results
are presented and compared to Neuro Fuzzy Sliding Mode Controller (NFSMC)
and PI controller. |
|
|
Full Text |
|
|
Title: |
Antibacterial activity and the hydrophobicity of silver nanoparticles
loaded fabrics of nylon |
Author (s): |
Eli Rohaeti and Anna Rakhmawati |
Abstract: |
The objective of this research is to study antibacterial and
hidrophobicity properties of nylon 6, 6 which coated nanoparticles -
silver and hexadecyltrimetoxcysilane (HDTMS). The nanoparticle - silver
was prepared with chemical reduction method by using tri-sodium citrate
as reducing agent and PVA as stabilizer. Nanoparticle - silver is
deposited on fabrics of nylon 6, 6 as antibacterial agent and HDTMS is
coated on those as hydrophobic agent. The fabrics of nylon 6, 6 are
characterized by analyzing the functional groups using ATR-FTIR,
hydrophobic properties by measuring contact angle, and antibacteria
properties by measuring clear zone. The addition of HDTMS compound can
decrease intensity of absorption bands of functional groups but increase
hydrophobicity property of nylon 6, 6. Nylon 6, 6 which coated
nanoparticle silver and HDTMS has the highest antibacterial properties.
The antibacterial properties of nylon 6, 6 before and after modification
against Staphylococcus aureus ATCC 25923 and Eschericia coli 32518 are
different. All samples have demonstrated a clear zone in inhibiting of
growing bacteria Staphylococcus aureus ATCC 25923 and Escherichia coli
ATCC 35218 at all the incubation time. |
|
|
Full Text |
|
|
Title: |
Design and development of an oil preheating system to study the
performance of a diesel engine |
Author (s): |
Rajesh Nayak, Indrajith and Chandrakant R. Kini |
Abstract: |
When a diesel engine is cranked while the engine is cold, there is
surface to surface contact between the moving parts of the engine such
as the crank shaft and its journal bearings, the crank pin and the big
end journal bearing of the connecting rod etc. The lubricating oil in
the sump requires some time to absorb heat from the combustion process
of the engine and reach its optimum operating temperature and viscosity
and form a complete lubrication film between all the moving and contact
surfaces of the engine. There is high friction and wear between the
moving components of the engine until the lubrication film has been
formed .It is estimated that approximately 40% of the total wear in an
engine during its operating lifespan occurs when the engine is idling to
reach its optimum operating temperature. Therefore if oil can be pre
heated to its optimum operating temperature before cranking the engine,
the oil will form a complete lubrication film in a shorter period of
time and it would be possible to reduce idling time, wear and tear
between components, fuel consumption, emissions and save time and money
in terms of running costs of the engine during the long term operation
of the engine. The objectives of this project are to fabricate an oil
pre heating system to suit the operating requirements of a 2 cylinder
4stroke Kirloskar diesel engine and to conduct performance tests on the
Kirloskar engine equipped with the oil pre heating system to study and
analyze the effect of pre heating oil its efficiency parameters. |
|
|
Full Text |
|
|
Title: |
Optimal placement of Unified Power Quality
Conditioner using Particle
Swarm Optimization method |
Author (s): |
M. Laxmidevi Ramanaiah and M. Damodar Reddy |
Abstract: |
This paper elucidates a Particle Swarm Optimization method (PSO) for
optimal placement of Unifed Power Quality Conditioner (UPQC) for loss
reduction and voltage profile improvement in the radial distribution
systems. UPQC comprises of a series and a shunt compensator. The shunt
compensator delivers reactive power to meet the load reactive power
demand. The series compensator takes part in voltage compensation. This
paper gives an insight into the usefulness of UPQC in which the series
compensator also shares part of the reactive power in steady state
conditions such that the UPQC is utilized optimally. PSO is utilized to
decide the optimal location and rating of UPQC. The proposed
optimization method is applied to standard distribution systems. |
|
|
Full Text |
|
|
Title: |
Excess molar volumes, speeds of sound and viscosities for binary
mixtures of 2-methylaniline with selected di- and tri – chloro
substituted benzene at various temperatures - Comparison with
Prigogine-Flory-Patterson theory |
Author (s): |
Muvva Raghavendra, A. Venkatesulu, K.
Sambasiva Rao, K. Ravindhranath |
Abstract: |
The densities (p), speeds of sound (u),
and viscosities (?)are reported for binary mixtures of 2-methylaniline with di- and tri- chloro substituted benzenenamely,1,2-dichlorobenzene,
1,3-dichlorobenzene and 1,2,4-trichlorobenzene over the entire
composition range at T = (303.15 - 318.15) K and at atmospheric
pressure 0.1 MPa. The excess properties such as excess molar volume,
excess isentropic compressibility and deviation in viscosity are
calculated from the densities, speeds of sound and viscosities. The
excess functionsare correlated by the Redlich – Kister equation. The
partial molar volumes, partial molar isentropic compressibilities,
excess partial molar volumes and excess partial molar isentropic
compressibilities are calculated for all the binary systems throughout
the composition range and at infinity dilutions. The VE results are
analyzed in the light of Prigogine-Flory-Patterson theory. Analysis of
each of the three contributions namely, interactional, free volume and
P*contribution to VE has shown that the interactional contribution is
positive for all systems and the free volume and P* contributions are
negative for all the mixtures. The variations of these parameters with
composition and temperature are discussed in terms of intermolecular
interactions prevailing in these mixtures. |
|
|
Full Text |
|
|
Title: |
Analysis of departure from nucleate boiling in bundle using a subchannel
analysis code |
Author (s): |
Taewan Kim |
Abstract: |
The accurate prediction of the departure from nuclear boiling is
critical in securing the safety of boiling systems. Especially, the
departure from nucleate boiling has a particular importance in reactor
core of a nuclear power plant system since the phenomenon itself can
indicate the soundness of the nuclear fuel cladding against the failure.
The departure from nucleate boiling in the core has been analyzed by
means of subchannel analysis codes. Thus, it is of importance to assess
the prediction capability of subchannel analysis codes for departure
from nucleate boiling against experimental data. In this study, the
subchannel analysis code, FLICA4, has been assessed against bundle
experiments conducted at NUPEC experimental facility. The assessment has
been conducted for steady-state cases and the results indicate that
FLICA4 predicts slightly lower departure from nucleate boiling power.
Considering the accuracy of Groeneveld look-up table and the
uncertainties in the experimental data, it is concluded that the
prediction by FLICA4 is conservative and acceptable. An assessment of
the critical heat flux models of FLICA4 has been carried out. The
Groeneveld look-up table and the W3 correlation have been examined. The
results reveal that the Groeneveld look-up table predicts more
conservative departure from nucleate boiling power with better accuracy
than the W3 correlation. Therefore, it is recommended to employ the
Groeneveld look-up table to estimate the critical heat flux. |
|
|
Full Text |
|
|
Title: |
Designing a building integrated photovoltaic system (BIPV) for
residential façade: Case study in Egypt |
Author (s): |
Nermin Mokhtar Farrag and Shaimaa Omran |
Abstract: |
Residential buildings consume more than 40% of the electricity in Egypt.
Limited energy resources impact critically the energy usage in
buildings. Moreover, there is an increasing demand for development of
sustainable buildings. Incorporating solar photovoltaic (PV) systems
into buildings which are referred to as building integrated
photovoltaics (BIPV) systems is an attractive solution to alleviate the
energy problem. It is considered a good alternative to centrally located
utility and at the same time replaces conventional building elements.
This paper investigates the implementation of a BIPV system for a
residential villa in Egypt, highlighting the energy produced by such
system and accordingly the reduction in emissions. |
|
|
Full Text |
|
|
Title: |
Enhancement of security related to ATM installations to detect
misbehavior activity of unknown person using video analytics |
Author (s): |
K. Kajendran and A. Pravin |
Abstract: |
Almost everyone in the world use Automated Teller Machine (ATM) to
either withdraw or deposit money from the bank account. However, most
ATM Machines are prone to security risk, security breach, even though
every ATM is equipped with CCTV installation. Some of security risk
involves at ATM centre includes damaging ATM machine and decamping with
cash, damaging CCTV camera to erase the identity of who involved in the
crime, installing skimmer machine to capture debit card details and PIN
number to create fake debit card, attacking ATM users and looting their
valuable money withdrawn from ATM machine, murdering security guard for
the purpose of looting ATM, withdrawing money by using fake ATM card.
ATM crime is on the raise in the recent years due to its remote
location. To enhance ATM security and to protect ATM centre form
untoward incidents, new form of security framework needs to be
identified. This paper presents a solution to identify unusual
activities at ATM premises. For efficient detection of unusual activity
in the ATM premises, this paper proposes a new mechanism of different
window size to capture action rich frame that helps us to identify
unusual activity and alert anticrime cell to avert ATM crime. This paper
also proposes idea of recognizing unusual sounds such as breaking ATM
machine with rod, screaming sound of customer, bursting sound of pistol
within ATM centre which generates high decibels than decibels generated
by normal human conversation and alert bank personal about ongoing crime
that helps to catch culprit red handed. This mechanism allows the system
to send notification message to bank authorities about ongoing
troublesome activities, even CCTV camera damaged by criminal. |
|
|
Full Text |
|
|
Title: |
EEG based diagnosis of Autism Spectrum Disorder using
Static and Dynamic
Neural Networks |
Author (s): |
Laxmi Raja and M. Mohana Priya |
Abstract: |
Electroencephalography (EEG) signals can be used to monitor the brain
activities of all human beings. As a result, it can be used to detect
abnormalities in the brain functioning. In this study, using Artificial
Neural Network (ANN) EEG signals of children with Autism Spectrum
Disorder (ASD) and non-ASD children were classified. Two neural network
models namely Pattern Recognition Neural Network (Pattern Net) and
Layered Recurrent Neural Network (LRN) were used. Auto regressive (AR)
Burg and LRN combination were found to have the highest classification
accuracy rate of 94.62%. Moreover, Bit Transfer Rate (BTR) of the
signals were calculated for each network in order to evaluate the Human
Machine Interface system performance. Maximum BTR of 6.08 bit/sec was
achieved for AR Burg and LRN combination. The proposed method has
obtained promising results. For the study, real-time dataset which was
obtained from ASD children of various special schools in Coimbatore has
been used. |
|
|
Full Text |
|
|
Title: |
Modeling the behavior of the CPU and the GPU versus the clusters number
variation for sequential and parallel implementations of BCFCM algorithm |
Author (s): |
Noureddine Ait Ali, Bouchaib Cherradi, Ahmed El Abbassi, Omar Bouattane and
Mohamed Youssfi |
Abstract: |
Image segmentation plays a crucial role in the medical imaging analysis
to diagnosis diseases. The FCM algorithm is a widely used technique in
this field and still being under improvement by researchers either at
accuracy or at time execution. BCFCM (bias field correction FCM) is a
robust variant of FCM that segment and corrects the intensity in
homogeneity artifact on medical images. However the algorithm is always
a time consuming problem because of the powerful treatment requirement.
GPU-based parallelism is one of the used solutions to enhance his
efficiency in terms of execution time. In this paper we have studied and
modeled the behavior of CPU and GPU hardware against the sequential
BCFCM and the parallel PBCFCM implementations. The modeled results for
i7 3.5 Ghz CPU and GTX 760 GPU considering the clusters number variation
show interesting behaviors and are in good accordance to experimental
ones. |
|
|
Full Text |
|
|
Title: |
Interior climate control of MIMO greenhouse model using PI & IP
controllers |
Author (s): |
Lammari K., Bounaama F. and Draoui B. |
Abstract: |
Climate control techniques in greenhouses are to improve plants
requirements and prevent unnecessary power consumption. Several
parameters may affect the growing of plants: internal air temperature,
inside vapor pressure and Co2 concentration. The equilibrium of these
settings is obtained by choosing the appropriate monitoring actions.
Here we developed a dynamic and complex nonlinear coupled (MIMO) system
of a horticultural greenhouse by using the MATLAB/SIMULINK environment.
In this paper the most widely used proportional -integral (PI)
controller was compared to the new integral -proportional (IP)
controller. |
|
|
Full Text |
|
|
Title: |
Project estimation of development of complex technical systems at the
designing stage under conditions of interval uncertainty using genetic
algorithm |
Author (s): |
A. E. Kolodenkova, V. V. Korobkin and E. A. Khalikova |
Abstract: |
Existing R & D advancements are accompanied by increase in complexity of
developed engineering systems and facilities, involved in major critical
industries, such as nuclear plant industry, oil and gas production,
aircraft and defense industry, transport, and so on. At current stage
the development of complex engineering systems (CES) is a labor
consuming process, since it is related with significant expenditures of
material and financial resources under risks stipulated by uncertainty
of internal and external factors of project environment, it involves
scientific researches, designing and experimental activities, field
tests, and development of documentation. Increase in CES complexity
results in increased designing times, decreased quality of CES,
violation of CES designing terms, or just in project failure. Thus, high
quality designing of CES under conditions of uncertainty is an urgent
and significant problem for numerous modern enterprises. This work,
aiming at elimination of risks, decrease in managerial errors adopted by
project directors under conditions of interval uncertainty of initial
data, proposes to apply estimation of time and cost of CES designing on
the basis of genetic algorithm comprised of analysis of possible
designing alternatives. |
|
|
Full Text |
|
|
Title: |
Least makespan scheduling algorithm for the hierarchical combined jobs
with jobshop characteristics |
Author (s): |
Y. -J. Lee |
Abstract: |
This paper aims to present the scheduling algorithm to minimize the
makespan for the combined systems which has jobshop characteristics.
Given the flow and hierarchy structure and the deterministic operation
time of each job are given respectively, we derive the extended
scheduling algorithm by modifying an existing jobshop algorithm. In
addition, we present the algorithm application procedure to satisfying
several different operation cases. Our proposed algorithm can be used to
build the scheduling policy for the assembly industries with different
flow structure and jobshop characteristics. |
|
|
Full Text |
|
|
Title: |
Consistent and energy competent routing protocol for mobile Ad Hoc
networks |
Author (s): |
M. Udhayamoorthi, P. Manimegalai and S. Karthik |
Abstract: |
The intention is to focus on the most thriving network i.e. the mobile
ad hoc networks. The autonomous nature and the restricted energy
capabilities of nodes regular path breakages occur which create improved
energy indulgences. The aim of the design is a dependable and energy
competent routing with nodes with improved energy levels. The scheme
focuses on the minimization of energy utilization during path breakages
by adapting an on demand local path revival scheme through a collection
of supporting nodes termed as holdup nodes. The collaboration of the
holdup nodes will minimize the energy utilization and considerably
improves the consistency. The behavior of the designed scheme is
estimated in terms of energy utilization, packet delivery ratio and end
to end delays over the contradictory node and its packet size. The
energy optimization and consistency is accomplished based on the
designed scheme which offers an ultimate solution to the upcoming
transmissions in mobile ad hoc network for a prolonged time. |
|
|
Full Text |
|
|
Title: |
Software for monitoring and control of
Enzymatic extracts: A tool for
research |
Author (s): |
Fernando Gonzalez-Fernandez, Claudia Lorena Garzon-Castro and Erlide
Prieto |
Abstract: |
A key aspect in bioprocesses is the monitoring and control of the
physical variables that affect it. Hence, the tailor-made software
development, capable of: reading, storing and graphing information of
process variables is of vital importance to users. This article presents
the development of SICOAVENZ (Automatic Variable Control System for
Enzymatic Reactions), an application that communicates with a data
acquisition board, to which sensors and actuators that allow interaction
with a bioreactor are connected, in which an enzymatic extract is
obtained. The software was developed under object-oriented programming
using C # (C Sharp). Where it is shown that implementing low-cost
systems using efficient, easy-to-manage and potentially scalable
software architectures, is possible. It was also possible to develop a
software that allows: 1) control pH and temperature variables, 2) keep a
constant record of the behavior of these variables, 3) generate reports
in Microsoft Excel, 4) handle information according to the role
(Administrator or User) and 5) to observe through a video camera the
experiment in progress. This development is characterized because it
can: 1) have a wide range of application in different fields of action,
2) ensure reproducibility of the process and 3) give independence to
scientific personnel. |
|
|
Full Text |
|
|
Title: |
An efficient Sheep Flock Heredity Algorithm for the cell formation
problem |
Author (s): |
K. V. Durga Rajesh, P. V. Chalapathi, M. Nageswara Rao, Eshwar
Krishna, K. Anoop and Y. Neeraj |
Abstract: |
CM (Cellular Manufacturing) is an essential GT (Group Technology)
application that has been used in several real-world industrial
applications. The problem of cell formation is considered as the first
most important criteria in the design CMS (Cellular Manufacturing
Systems) in order to minimize lead time and setup time to maximize
productivity. In this paper, an efficient SFHA (Sheep Flock Heredity
algorithm) is suggested for problem solving where the number of cells is
not fixed a priori. To assess the effectiveness of the proposed
algorithm, a set of 10 benchmark problems is used; the results are then
compared with other methods by considering Grouping Efficacy parameter.
From the results we can say that algorithm which is proposed has
performed well on the standard problems. |
|
|
Full Text |
|
|
Title: |
Mobile aided improved trilateral localization by adopting random way
point pattern |
Author (s): |
P. Saleem Akram and T. V. Ramana |
Abstract: |
Localization plays a prominent in WSNs. It is essential because if one
node contains information collected from physical entity to transfer and
the location of other node which is meant to receive is not known then
the information gathered becomes useless. The basic idea in localization
involves placing GPS in each and every node in the network to know its
location. It results in increase of cost. Moreover the efficiency of GPS
is not Satisfactory in monitoring indoor applications. In localization,
the distance between nodes is essential which will be calculated by
using RSSI method. RSSI is adopted in many of the localization
algorithms because of its low cost and simplicity. In ranging, Classical
Trilateral algorithm is considered but it results distance errors due to
instability in equations. The proposed mobile aided Trilateral method
results in increasing the network lifetime, reducing the time of
estimation, improving the signal strength besides minimizing the energy
consumption of nodes. In this method the mobile node moving in random
manner gathers the information of neighbouring nodes which will be
further useful in Trilateral minimum condition method to localize the
unknown nodes position. In this method the distance calculations are
performed by mobile node resulting in the minimization of energy usage
and distance error associated with neighbouring nodes. As a result the
proposed mobile aided method produces the best results in case of signal
strength and life time of network when compared to previous Classical
Trilateral methods. |
|
|
Full Text |
|
|
Title: |
Manually controlled enhanced wireless intelligent fire fighting robot |
Author (s): |
Sandip Gupta Farogh Ahmad S. Sundar and Shanmugasundaram M. |
Abstract: |
Expanding human populace and innovative improvement has prompt increment
in flame mishaps and dangers. Unavoidable conditions and physical
constraints of person make fire extinguishing a testing and demanding
assignment. Fire extinguishing is an exceptionally unsafe undertaking
and it might likewise include death toll. Robotics is the rising answer
to ensure the safety of the surroundings and human lives. Fire
extinguishing robot is an equipment model which can be utilized for
extinguishing the fire amid flame mischances. It can decrease the
blunders and constraints confronted by the people during the
extinguishing process. Our outlined robot can seek the zone, find the
fire and extinguish it before it turns out to be out of control. It can
explore the building while effectively checking for fire. It can be
operated remotely by any individual from anyplace on the planet using
mobile phone or a laptop. With the assistance of Internet of Things and
machine talking application, it can alert and notify the client about
the status of the situation at that particular location. The robot which
we have proposed in this paper has discovered its application in flame
dousing operations amid flame mishaps where the likelihood of the
servicemen to enter the fire inclined region is less. |
|
|
Full Text |
|
|
Title: |
A novel scheme for optical millimeter wave generation using MZM |
Author (s): |
Poomari S. and Arvind Chakrapani |
Abstract: |
This paper proposes a radio-over-fiber system which employs a frequency
multiplier scheme to generate optical millimetre wave (MMW) based on
external modulation performed using two cascaded Mach-Zehnder
modulators. By adjusting the direct current bias voltages of intensity
modulator, modulation voltage and phase, the frequency quadrupling
optical MMW signal is generated. The performance of the scheme is
verified by transmitting the signal along the fiber over a distance of
40 km in terms of bit error rate (BER) performance and received power.
The eye diagram is wide open and BER values are low for a data rate of
2.5 Gbps. |
|
|
Full Text |
|
|
Title: |
Review of solar thermal storage techniques |
Author (s): |
Ali Mohammed Hayder, Azwan Bin Sapit and Qahtan Adnan Abed |
Abstract: |
For
some time, solar energy has occupied ranked prime position in the
renewable energy research field, due to the fact that it is an
inexhaustible energy source. However, the main problem of solar energy
is that it is an ?intermittent source, due to it ??dependence on the
period of solar radiation. Consequently, ?thermal energy storage is
considered a ?perfect ?option to solve this problem. A thermal ?energy
storage unit works to enhance the ?conservation of energy and hence,
improve the ?performance of the solar heating system. This paper reviews
the literature concerning the ?usefulness of using the most important
two core components in solar heat applications: thermal solar collectors
and thermal energy storage systems. It includes a ?review and discussion
of the different kinds of thermal solar collectors and thermal energy
storage systems, including a latent ?heat storage system, a sensible
heat storage system, ?and a hybrid ?heat storage system. The thermal
energy storage systems are studied in terms of ?efficiency, thermal
losses, the thermal conductivity of the material used for ?storage, and
?output temperature. The conclusions in this work suggest that latent
?heat storage through phase change material (?PCMs) is better than
sensible heat storage, due to the higher ?thermal energy storage density
?of PCMs. The conclusions also indicate that the use of paraffin wax as
a PCM gives ?a better ?performance compared to other phase change
materials. In addition, the ?thermal performance of the solar heating
system can also be enhanced by increasing the thermal conductivity of
?paraffin wax by adding other materials.? |
|
|
Full Text |
|
|
Title: |
Mitigation of interferences in LTE systems |
Author (s): |
Amutha Prabha N., Abhishek Gudipalli and Vidhya Sagar G. |
Abstract: |
A channel independent pre-coding for MIMO-OFDM systems with insufficient
cyclic prefix (CP) is proposed by using the notion of interference
nulling. The proposed pre-coding is more bandwidth efficient than the
conventional zero-padded (ZP) or CP added MIMO systems, such as, ZP-only
and CP-OFDM, when the number of receiver antennas is not more than the
number of transmitting antennas. OFDM is an enticing modulation
technique for transmitting large amounts of digital data over radio
waves. Peak to Average Power Ratio (PAPR) for MIMO-OFDM system is still
a demanding area and a difficult issue. A novel phase offset scheme to
reduce PAPR in Alamouti coded OFDM systems without side information (SI)
is by multiplying different phase rotation sequences by their
corresponding phase offsets at the transmitter. Moreover, at the
receiver, a MED decoder is also proposed, and the phase offset with the
minimum Euclidian distance is selected as the sign of phase rotation
sequence used at the transmitter. In this way, the SI can be obtained by
estimating the phase offset, since they are one-to-one correspondence.
Therefore, the proposed scheme does not need to reserve bits for the
transmission of the SI, resulting in an increased data rate. |
|
|
Full Text |
|
|
Title: |
The variations of the 13c and 18o in the middle Permian rocks, Volga
river outcrops, Russia |
Author (s): |
N. G. Nurgalieva, M. P. Arefiev and V. V. Silantiev |
Abstract: |
Data on stable isotopes of carbon and oxygen of the Permian carbonate
rocks play an important role to create geochemical frame of the Permian
formations. The stable isotopes records reflect changes in chemical
composition of carbonate rocks in dependence on regional and global
factors in history of the Permian period. Variations of stable isotopes
across the Middle Permian rocks correlate with the stratigraphic
boundaries and paleo environmental changes. |
|
|
Full Text |
|
|
Title: |
Effect of double fuzzy logic controller (DFLC) based on power system
stabilizer (PSS) on a tie- line two generators system |
Author (s): |
Hayfaa Mohammed Hussein, Marizan Sulaiman, Rosli Omar and Mohd. Shahrieel
Mohd Aras |
Abstract: |
This research was proposed a new type of power system stabilizer based
on fuzzy set theory, to improve the dynamic performance of a
multi-machine power system. To have good damping characteristics over a
wide range of operating conditions, speed deviation and it is derivative
of a machine are chosen as the input signals to the fuzzy stabilizer on
that particular machine. Fuzzy logic controller (FLC) Two area
symmetrical systems connected via tie-line are measured to show via
performance of these controllers. This research presents the analysis of
change of speed (??), change of angle position (?d) and tie - line power
flow (?p). In tie-line system two generators control arrangement single
fuzzy logic controller (SFLC) have been used as a primary controller,
whereas double fuzzy logic controller (DFLC) used as a secondary
controller. In addition to this, the system shows comparative between
two controller single and double fuzzy controller has been used for the
system to achieve the best results using Simulink/MATLAB. Double fuzzy
controller has a greater effect on the tie-line system and become more
smoothing than single fuzzy controller because has increased the damping
of the speed ??, angle rotor ?d and power ?p. |
|
|
Full Text |
|
|
Title: |
Evaluating damage to reinforced concrete during mechanical compression
and bending tests |
Author (s): |
Denis D. Dann, Tatyana V. Fursa, Konstantin Yu. Osipov and Maxim V.
Petrov |
Abstract: |
The article proposes a method for evaluating damage to reinforced
concrete subjected to uniaxial compression and four-point bending. The
method is based on measuring and analyzing the parameters of electric
and acoustic emissions and electric response to impact. It is
established that the main signs marking the start of the cracking
process are: the appearance of high-amplitude acoustic and
electromagnetic emission signals changes in the spectral composition of
the electrical signal, and the increased attenuation coefficient of the
electric response's energy. Continuous or recurrent monitoring can be
used to assess deterioration processes in reinforced concrete subjected
to mechanical stress. |
|
|
Full Text |
|
|
Title: |
Design and analysis of pre mixed and non premixed combustion of FBC
gasifier using wooden chips blended with waste transformer oil |
Author (s): |
Sriram V., Vemula Kishore Kumar, Ramakrishna and Britto Joseph G. |
Abstract: |
Gasification is seen as an important technology for expanding the use of
biomass and waste oil as an alternate fuel. The Fluidized Bed Combustion
is used to efficiently combusts low-grade solid fuels, significantly
reduces NOX and SOX emissions, and increases the heat recovery
efficiency between solids and gases discharged from the process. The
blending ratio was calculated by using practical analysis method. The
FBC Gasifier of capacity 4 kg has been designed, and fabricated. Locally
available wood chips blended with waste oil and used for gasification
with proper blending ratio. Then the proximity and ultimate analysis of
fuel has carried out for the fuel. The fuel was filled in the FBC
gasifier then the fuel was burnt by supplying air from the air blower
and it produces the smokes. This smokes are contains the producer gases.
Finally composition of producer gas was analysed and temperature profile
of reactor was also analysed under this study. |
|
|
Full Text |
|
|
Title: |
Grid computing for distributed neural networks: An approach |
Author (s): |
Abhishek Gudipalli and M. Saravanan |
Abstract: |
In this paper, we report the first evaluation of cooperation computing
for artificial neural networks in distributed environment. Several
performance-relevant factors are considered, including architecture of
computing service, workflow and cooperation strategy. Evidence on basic
processes and performance of such strategies of cooperation computing
are reviewed. We also present a theoretical analysis of
distributed-training strategies of neural networks for
structure-distributed and data-distributed. We prove a strategy of
distributed computing based on data-distributed is more feasibility for
distributed neural networks, which makes training the neural networks
more efficient. In the final, we concluded the evaluation by briefly
considering selected open questions and emerging directions in
construction of grid computing for distributed neural networks. |
|
|
Full Text |
|
|
Title: |
Application of artificial intelligence in energy efficient HVAC
system design: A case study |
Author (s): |
Priyabrata Adhikary, Sumit Bandyopadhyay and Susmita Kundu |
Abstract: |
Artificial intelligence (Artificial Neural Network-ANN, Fuzzy Expert
System - FES, Genetic Algorithm - GA etc.) are widely accepted as a
technology offering an alternative way to tackle complex and ill-defined
problems. They can learn from examples, are fault tolerant in the sense
that they can handle noisy and incomplete data are able to deal with
non-linear problems and, once trained, can perform prediction and
generalization at high speed. They have been used in diverse
applications in control, robotics, pattern recognition, forecasting,
medicine, power systems, manufacturing, optimization, signal processing
and social/psychological sciences. They are particularly useful in
system modelling, such as in implementing complex mappings and system
identification. This study presents application of ANN in HVAC system
design problem. It can also be used for the estimation of cooling or
heating loads of buildings. In all those models, multiple hidden layer
architecture has been used. Errors reported in these models are well
within acceptable limits, which clearly suggest that artificial
intelligence (ANN) can be used for modelling other fields of energy too.
To the best of the author’s knowledge these novel approaches for
application of Artificial Intelligence or Artificial Neural Network
(ANN) in energy efficient HVAC system design is absent in thermal
engineering or fluid mechanics literature due to its assessment
complexity. |
|
|
Full Text |
|
|
Title: |
Harmonic reduction using hybrid power filter for three phase four wire
system |
Author (s): |
Mohit Singh Ahlawat R. Balasubramanian and K. Parkavi Kathirvelu |
Abstract: |
In this paper a hybrid filter which is a combination of series active
filter and shunt passive filter is designed to mitigate the harmonics
present the distribution system feeding unbalanced load. The control
scheme is established on the PQ theory which is also knows as
instantaneous theory. The control strategy is applied to eliminate the
harmonics present in the load current of balanced and the unbalanced
loads. The conventional PI controller has been implemented in the
voltage and current loop of active power filter. In this topology, the
passive filter compensation performance has been improved by series
active filter. The proposed control strategy with the designed hybrid
power filter is simulated in MATLAB simulink software and the results
are presented. |
|
|
Full Text |
|
|
Title: |
Modelling and analysis of water heating
using recovered waste heat from hot flue gases of Chulha |
Author (s): |
Saravanna J. Y., Rahul Kantamnen, Nizvan
Fasil, Seralathan Sivamani, Hariram V., Micha Premkumar T. and Mohan T. |
Abstract: |
The
study on heating water for domestic applications by using low grade
waste heat recovered from the exhaust flue gas of Chulha is analyzed
theoretically as well experimentally. Two different material
combinations are considered for the hot fluid domain (shell) and cold
fluid domain (pipe). Theoretical analysis is carried out to estimate the
time required to heat the water from its room temperature to 75oC by
transfer of heat energy. Numerical investigations are carried out to
validate the findings obtained theoretically. Time required in raising
the water temperature from its room temperature of 27oC to 75oC is 8 hr
for a stainless steel shell - stainless steel pipe combination WHRS.
This heating time is reduced by around 4 hr using stainless steel shell
- copper pipe combination WHRS. Using biogas as a fuel for the Chulha,
the cost of heating the water is reduced to 1.90 Paisa per kg and the
cost saved per year on biogas by a typical Indian household is estimated
to be 3580 in Indian rupees. Numerical simulation showed a good
agreement between the simulation results and theoretical analysis. This
WHRS can be used to recover the low grade waste heat released through
chimney exhaust flue gas by domestic applications like fireplace,
domestic water heating boiler thereby reducing the conventional energy
consumption as well as minimizing the environmental degradation. |
|
|
Full Text |
|
|
Title: |
Survey by Airborne Laser Scanner of open
large structure: A case study of Pompeii Amphitheatre |
Author (s): |
Massimiliano Pepe |
Abstract: |
The
purpose of this paper is to show the potential of Airborne Laser Scanner
(ALS) in the survey of large and open structures in the Cultural
Heritage field. Nowadays, this technology is becoming spread in the
field of Cultural Heritage thanks to the possibility to obtain a large
number of points in a short time. In fact, the latest generation of ALS
sensors are able to acquire up to several million measurements per
second and to generate an elevated point density. In addition, if this
sensor is combined with digital camera, it is possible to obtain even
RGB colour information. In this paper are described the features,
methods and techniques for acquisition by ALS system. In particular, it
is presented a wide analyse of the three dataset (calibration, laser
distance measurements and Position-Orientation System data). The
assembly of these datasets allows obtaining the correct georeferncing of
the point clouds. A case study of a survey carried out by ALS system on
the archaeological site of Pompeii (Italy) is presented. In this case,
all the steps necessary to realize the survey are described (planning,
acquisition and post-processing task). Also, starting from the point
clouds, in CAD environment a classic representation (in a suitable
scale) of Roman amphitheatre is showed. |
|
|
Full Text |
|
|
Title: |
Three-coding test compression technique
for SoC based design |
Author (s): |
Chakrapani K., Saravanan and S. Muthaiah
R. |
Abstract: |
Testing a system-on-chip (SoC) result in serious challenges due to the
growth of volume and test power consumption of test data sets. Several
compression techniques for test data came into light for reducing volume
of the test data and its scan power. This paper mainly concentrates on
increasing the compression ratio and power consumption for scan vectors
through new three coding compression technique. This encoding scheme
includes block merging along with three types of coding techniques to
obtain efficient compression of scan test sets. This paper review the
impact of compressed test data on consumption of power and test
application time are also considerable. The actual test data is decoded
with Simple decoder architecture. Experimental Results on ISCAS89
benchmark circuit shows the effective ratio of proposed method compared
with prior works. |
|
|
Full Text |
|
|
Title: |
Specifics of calculating the stability of
mine workings when applying drilling and blasting |
Author (s): |
Aleksandr Evgenyevich Sudarikov and
Viktoriya Anatolyevna Merkulova |
Abstract: |
The
article describes the aspects of mine workings when there are cracks in
the rock massif of several systems. The research is intended to
determine the massif stability around rocks. A methodology to determine
strength parameters of rocks in the presence of cracks was proposed. The
undertaken studies allowed developing reasonable data sheets for
supporting mine workings in various mining and geological conditions.
Processing of mathematical modeling results by using statistical methods
allows significantly facilitating the calculation of maximum load acting
on the support without resorting to direct modeling within the specified
range of rock strength parameters. In this manner, it becomes possible
to use this approach in a mining company without complex preparation of
initial data to accompany the mathematic modeling. |
|
|
Full Text |
|
|
Title: |
Meta material inspired Tri-Band antenna
with SRR and shorting stub |
Author (s): |
B. L. Prakash, B. T. P. Madhav, T. Lokesh,
Y. Rajitha Sri, N. V. D. S. Aditya and M. Venkateswara Rao |
Abstract: |
Two
novel meta-material inspired antennas are proposed in this paper which
can be applied for Mobile Satellite Services (MSS), Airport surveillance
radars, WIMAX and S - Band applications. Antenna 1 has two triangular
split ring resonators and fed by Co-planar Wave Guide (CPW). After
Modelling and Simulating antenna1, three frequency bands 2.1~2.3GHz,
3.0~3.4GHz and 6.5~6.7GHz are obtained. To improve the characteristics,
antenna 2 is proposed whose shape is modified by adding two
Complementary rectangular shaped split ring resonators in the ground of
antenna1. After Modelling and simulating antenna 2 it is observed that
it enhances the properties of antenna 1 with improved characteristics.
Antenna 2 has radiation efficiency of 0.998, front to back ratio of
1.0049 and peak directivity is 1.17. |
|
|
Full Text |
|
|
Title: |
Evaluating the effect of crumb rubber and
super plasticizer on the properties of roller compacted concrete using
response surface methodology |
Author (s): |
Musa Adamu, Bashar S. Mohammed and Nasir
Shafiq |
Abstract: |
In
this study, the effect of partial replacement of fine aggregate with
crumb rubber, and the addition of super plasticizer by weight of cement
in roller compacted concrete (RCC) pavement was studied and analyzed
using response surface methodology (RSM). Roller Compacted Rubber Crete
(RCR) is used as the terminology for RCC where fine aggregate is
partially replaced with crumb rubber. Before testing, the mixes
(experimental work) were designed using RSM with the central composite
design applied. After executing the experimental works, regression
analysis was used to obtain the model equations for Vebe time,
compressive strength, and flexural strength. The RSM regression analysis
showed that Vebe time decreases addition of crumb rubber and super
plasticizer, compressive and flexural strength decreases with increase
in crumb rubber and increases with the addition of super plasticizer.
Therefore, the addition of super plasticizer can be used to mitigate the
negative effect of crumb rubber on the compressive and flexural strength
of RCR. The RSM regression analysis also showed that there is a good
correlation between the predicted models and the experimental results.
Then, multi-objective optimization was achieved when Vebe time is
minimized, compressive and flexural strengths maximize. Based on the
results of optimization, an optimum mixture can be achieved with a 10%
volume replacement of fine aggregate with crumb rubber, and 1.51%
addition of super plasticizer by weight. |
|
|
Full Text |
|
|
Title: |
Review on energy efficient green
communication networks for wireless and mobile communication |
Author (s): |
T. Kalyani, Anuradha Thotakuri and
Mahendra Vucha |
Abstract: |
Recent advancements in Personal Digital Assistant (PDA), such as smart
phones, smart watches, smart glasses, personal wearable communication
and healthcare devices, have changed us to move towards the smart
society. By strengthening the mobile and wireless networks, two or more
devices can communicate with each other and exchange information and
display necessary information anytime anywhere. However, the rapid
development in wireless communication technology leads to imbalance of
the resource utilization and also increases the unnecessary energy
consumption of the PDA’s greatly. The emerging technologies are
efficient only when they are consistent and compatible with our living
planet nature. So, the environment should be utmost priority while
developing technologies for communication system in wireless
communication which is the most creative and arising field for PDA’s.
Green communication helps in balancing the resources, sharing
information, routing adaption and spectrum efficiency. Thus, green
communication had become emerging research area for future mobile and
wireless networks. So this article demonstrates the review of various
green communication techniques adopted in wireless communication. This
article also describes energy efficient methodologies used in wireless
communication. |
|
|
Full Text |
|
|
Title: |
Biosugar production from oil palm mesocarp
fiber (OPMF) using viscozyme |
Author (s): |
Abdulkarim Ali Deba, Nor Azimah Mohd Zain
and Madihah Salleh |
Abstract: |
In
this study, the performance of HNO3 and NaOHpretreatmentson oil palm
mesocarp fiber (OPMF) was evaluated based on the residual carbohydrate.
The best pretreatment condition was ascertained for reducing sugar and
biosugar produced after saccharafication with viscozyme. The
pretreatment with 2 % (v/v) HNO3 improved cellulose concentration from
33.14 % to 60.0 %, while hemicellulose, lignin and ash were reduced by
25.59 %, 10.0 % and 25.9 % to 10.0 %, 5.33 % and 3.0 %, respectively.
Enzymatic treatment using 1g solid loading, produce highest production
in terms of arabinose 10.5 g/l, glucose (1.1 g/L) and xylose (0.42 g/L)
was obtained under agitation. Whilefor 10 grams solid loading, highest
level of bio-sugar was obtained with arabinose (0.8 g/L) and glucose
(1.6 g/L). FESEM-EDX and FTIR images before and after saccharification
successfully showed the effect of enzymatic treatment on the mesocarp
fiber. |
|
|
Full Text |
|
|
Title: |
UAV 3D formation flight using the relative
state space method |
Author (s): |
Tagir Z. Muslimov, Rustem A. Munasypov |
Abstract: |
In
this paper the problem of fixed-wing unmanned aerial vehicles (UAVs) 3D
formation flight was solved using the relative state space method. Using
this method, the UAVs formation becomes an autonomous decentralized
multi-agent system since the system functional order is generated by the
interaction of its agents. The solution was tested in MATLAB/Simulink
using full dynamic models of the vehicles. |
|
|
Full Text |
|
|
Title: |
Saturation dynamics of aluminum alloys
with hydrogen |
Author (s): |
Belyaev Sergey V., Baranov Vladimir N.,
Gubanov Ivan Y., Kulikov Boris P., Lisiv Elena M., Bezrukikh Alexander
I., Leonov Victor V., Kirko Vladimir and Koptseva Natalia P. |
Abstract: |
This
work presents research results on the dynamics of the saturation of
aluminum and its alloys with hydrogen in a flow chart for preparing
melts in the manufacture of flat-shaped ingots at UC RUSAL. It is
demonstrated that one of the main sources of the saturation of an
aluminum melt with hydrogen is its interaction with atmospheric moisture
during open metal pouring in the course of its transportation from an
electrolyzer to a mixer. According to the results of the conducted
works, new technical solutions have been proposed whose introduction
will ensure, in the long term, a considerable decrease in hydrogen
content in aluminum ingots and low-alloyed aluminum alloys. |
|
|
Full Text |
|
|
Title: |
Design and implementation of hybrid
cascaded energy efficient Kogge Stone adder |
Author (s): |
J. Vignesh, E. Gajendran, Sameeruddin
Khan, N. Balakumar and S. R. Boselin Prabhu |
Abstract: |
Addition plays a vital role in all arithmetic operations. It is used
widely in many VLSI systems such as application specific DSP
architecture and microprocessor architecture. The energy efficient
designs have gained more recent attention and for highly employed
functional units, especially for the adders. The energy consumption of
an adder depends on the circuit minimizing, the addition procedure, the
recurrence structure and the wiring complexity. Weinberger and Ling are
the two most commonly used binary addition algorithms that are used in
adders. This paper gives the performance evaluation of addition
algorithms on Kogge-Stone arrangement and have been observed to save
energy by the proper selection of addition algorithms in 16-bit adders.
The design of Kogge-Stone adder has been carried out by using TANNER EDA
tool. The efficiency of the adder design can be improved by prefix
selection, the algorithm, computational sum and logic depth. When
compared to Weinberger algorithm, the number of gates used is less in
case of the proposed ling recurrence algorithm. |
|
|
Full Text |
|
|
Title: |
Petrographic investigations and reservoir
potential of shallow marine sandstone: A case study from Nyalau
Formation, Sarawak Basin, Malaysia |
Author (s): |
Muhammad Atif Iqbal, Ahmed Mohamed Ahmed
Salim, Numair A. Siddiqui, Hassan Baioumy and Syed Haroon Ali |
Abstract: |
Reservoir potential and heterogeneity are critical important factors for
exploring shallow marine sandstone reservoirs. Shallow marine sandstones
are crucial hydrocarbon bearing reservoirs around the globe and in
Southeast Asia. The integrated analysis consisting of petrographic
characteristics and reservoir properties for Nyalau Formation from
Bintulu area have been discussed in this case study. The field
observations, helium porosimetry on core plugs, thin sections study and
petrographic approach provides insight into the factors responsible for
variations in porosity and permeability in shallow marine sandstone. The
results indicate that Nyalau Formation is comprised of five different
facies well exposed in Bintulu area, Sarawak basin, Malaysia. The
identified facies based on sedimentary structures and lithology are,
trough cross-bedded sandstone, laminated sandstone, bioturbated
sandstone and massive sandstone facies. It is analyzed that total clay
content, grain size, grain shape and grain sorting impact the reservoir
in different ways. The trough cross-bedded and massive sandstone facies
have low clay content and medium grained, subrounded and well sorted
having porosity around 20-25 % and permeability 15-20 millidarcies. The
laminated and heterolithic sandstone facies are fine grained, poor to
moderately sorted, high clay amount and subangular are comprised of low
porosity (8-12 %) and low permeability (0.5-2 millidarcies). The
bioturbated sandstone facies is highly disturbed due to burrow activity
and having very low porosity (5 %) and low permeability (0.5-1
millidarcies). By integrating these parameters, it is concluded that
trough cross bedded and massive sandstone facies have best reservoir
quality among all facies of Nyalau Formation. |
|
|
Full Text |
|
|
|
|
|