Title: An Empirical Study about the Impact of Local and Global functions on Student’s Behavior | ||
Author(s): Said Taan El-Hajjar | ||
Pages: 1-18 | Paper ID: 111501-4242 IJBAS-IJENS | Published: February, 2011 |
Abstract: This study identifies the generalities on the real functions of a real variable (local study) and
generalities on functions (global study). In this study we will see abstract proofs for the notions
of limit and continuity. A geometrical study of a polynomial and a rational function is going to be
developed through abstract proofs in this study. These abstract proofs are being refused by most
students throughout the world. Moreover, they are getting afraid of them. Although
mathematicians insist on these proofs to initiate logic and critical thinking among pupils, they
are still difficult and complex to be absorbed by the student’s mind. A survey study is done in two
universities to explore the reasons behind the pupils’ fears and to develop a model that releases
them.
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Keywords: Limit, continuity, rational, inversion, composite, functions, interval, monotone, bounded, power, maximum, and minimum. | ||
Full Text (.pdf) | 736 KB |
Title: Radial Vibration of Wave Propagation in an Elastic Medium of a non-Homogeneous Orthotropic Material Under Influence of Rotation | ||
Author(s): G. A. Yahya, A. M. Abd-Alla | ||
Pages: 19-26 | Paper ID: 102006-1101-4242 IJBAS-IJENS | Published: February, 2011 |
Abstract: In this paper, the non-homogeneous elastic medium in an orthotropic
infinite circular cylinder subjectedto a certain boundary conditions is
studied under influence of rotation.Closed-form stress solutions are
obtained for the rotating orthotropic cylinder with a constant thickness for
different cases (1) solid cylinder, (2) a cylinder mounted on a circular rigid
shaft, and (3) a cylinder with a circularhole at the center. Numerical results
are given and illustrated graphically for each case considered. The results
indicate that the effect of rotation and non-homogeneity are very
pronounced. Comparison made with the results predicted by the theory of
elasticity in the absence of rotation.
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Keywords: Elasticity, orthotropic material, Rotating cylinder, non-homogeneous material. | ||
Full Text (.pdf) | 209 KB |
Title: Micropropagation of Aglaonema using axillary shoot explants | ||
Author(s): Totik Sri Mariani, Any Fitriani, Jaime A. Teixeira da Silva Adhityo Wicaksono, Tet Fatt Chia | ||
Pages: 27-30 | Paper ID: 111601-9393 IJBAS-IJENS | Published: February, 2011 |
Abstract: Micropropagation of Aglaonemavar. Cochin was performed using axillary shoots as
explants. Shoots could be induced on the bulb region on Murashige and Skoog (MS) medium
supplemented with 1.5 mg/l thidiazuron (TDZ).For shoot proliferation, small shoots were
multiplied on MS medium supplemented by 1.5 mg/l TDZ and 3 mg/l benzylamino purine
(BAP), whose addition was important to avoid callus growth. The highest multiplication rate of
Aglaonemashoots was achieved at the 5
th
subculture. After the 5th
subculture (10 weeks) 1000
shoots could be obtained from two initial axillaryshoots. Plantlets rooted and developed on MS
medium containing 3 mg/l indole-3-butyric acid. Acclimatization was performed successfully
with 100% survival rate on sphagnum moss followed by transfer to soil.
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Keywords: Aglaonema, axillary shoot, multiplication rate, plantlet, thidiazuron. | ||
Full Text (.pdf) | 330 KB |
Title: Recrystallization Phenomena in Melt-Spun (Fe100-xVx)75P15C10 Alloys | ||
Author(s): M. A. S. Karal, K. Bärner, M. Kamruzzaman, D. K. Saha, F. A. Khan | ||
Pages: 31-35 | Paper ID: 112601-7878 IJBAS-IJENS | Published: February, 2011 |
Abstract: (Fe100-xVx)75P15C10(x=0, 5, 10 and 15) semi-amorphous
alloys were prepared by the melt spinning technique and their
structural, thermal and magnetic properties were investigated. The
structure of the alloys was studied by X-ray diffraction (XRD) for
annealing temperatures of 400 ºC to 650 ºC within a 30 minute
annealing time. The XRD patterns show that the samples contain a
BCC structure for temperatures between 400 ºC to 450 ºC and a
hexagonal structure for the temperatures between 500 ºC to 650 ºC.
The lattice parameter of the BCC structure changes from 2.854 to
2.870 Å with the temperature. The lattice parameters a and c for the
hexagonal structure are (5.011- 5.045) Å and (13.676-13.822) Å,
respectively. The grain size is found to vary from 10 to 60 nm. The
recrystallization temperatures of the amorphous phase volume and
weight changes were measured by differential thermal analysis
(DTA) and thermo gravimetry (TG), respectively. The saturation
magnetization gradually decreases with the increase of the
substitution of Fe by V at room temperature (RT).
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Keywords: Amorphous alloys; Recrystallization; XRD; DTA; Magnetization. | ||
Full Text (.pdf) | 594 KB |
Title: Fabrication of Pllulan/Silver Nanoparticle Composite Nanospheres Using Electrospray Technique for Antibacterial Applications | ||
Author(s): Md. Shahidul Islama, Md. Ashraful Islam Molla, Mithun Sarker, Mohammad Mainul Karim, Shah Md. Masuma, Jeong Hyun Yeum | ||
Pages: 36-40 | Paper ID: 115501-8989 IJBAS-IJENS | Published: February, 2011 |
Abstract: Pullulan (PULL)/silver (Ag) nanoparticlecomposite nanospheres were prepared out of
aqueous solutionsusing electrospray technique by controlling the concentration of PULL
solution. Since pullulan is a water soluble and interesting natural polymer for many of its merits
and good properties, it is one of the best materials for preparation of antibacterial material.
Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray
diffraction (XRD), thermal gravimetric analysis (TGA), and antibacterial activity testwere done
to characterize the PULL/Ag composite nanospheres morphology and properties. XRD data and
TEM images support the coexistence of Ag and PULL matrix where Ag nanoparticles were well
dispersed. In preservation test, aforementioned composite nanospheres confirm an excellent
antibacterial performance, elucidating for practical uses as a new preservative. Moreover, the
addition of Ag nanoparticles enhances thermal stability of PULL/Ag composite nanospheres.
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Keywords: Electrospray, Pullulan, Silver nanoparticles,Nanospheres, Antibacterial performance. | ||
Full Text (.pdf) | 284 KB |
Title: CPW FED DOUBLE BOWTIE MICROSTRIP SLOT ANTENNA 3 ARRAY FR4 SUBSTRATE FOR 2.4 GHz COMMUNICATION | ||
Author(s): Bualkar Abdullah, Yono Hadi Pramono, Eddy Yahya | ||
Pages: 41-44 | Paper ID: 116101-8585 IJBAS-IJENS | Published: February, 2011 |
Abstract: Prototype of double Bow-Tie microstrip slot antenna triple array
using input of coplanar waveguide have
been fabricated and characterized. Design
of microstrip with the dielectric constant is
4.3 from FR4 substrate. The calculation
was carried out form the existing data to
obtain the form and dimension of antenna
which can put hand to the frequency 2,4
GHz. However to fabricate of antenna
where antenna picture have been made at
PCB to etching by using condensation
FeClO3. Microstrip slot antenna to different
of wide slot and array used. The
characterisation of antenna is measured
by using Network Analyzer with Return
Loss - 38.28 dB, -15 dB and -32.25 dB,
VSWR 1.09, 1.15 and 1.10 and Bandwidth
0.68 GHz, 0.2 GHz and 0.16 GHz for wide
slot 1.2 mm, 2.0 mm and single array
respectively. The results indicate that the
proposed microstrip structure be at to
span the wideband and applicable to use
in 2.4GHz wireless communication called
as panel antenna.
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Keywords: Panel Antenna, Microstrip, Return Loss, VSWR, Double Bow-Tie and Multi array. | ||
Full Text (.pdf) | 361 KB |
Title: The Exploratory Study of Industrial Engineering Students’ Perceived Quality Dimension | ||
Author(s): Bualkar Abdullah, Yono Hadi Pramono, Eddy Yahya | ||
Pages: 45-51 | Paper ID: 116401-0808 IJBAS-IJENS | Published: February, 2011 |
Abstract: This research aims to investigate the dimensions
of Industrial Engineering students’ perceived service quality
at Indonesia public higher education institution context. The
research used a quantitative approach. The data was carried
out through survey to 89 industrial engineering higher
education students. The data analysis was using factor analysis
and reliability test with cronbach alpha approach. The
research result shows that the industrial engineering students’
perceived service quality is consist of five dimensions which
are academic content and knowledge center, supporting
facilities, lecture responsibilities,social activities, and class
program and facilities.
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Keywords: Perceived Service Quality Dimension, Industrial Engineering, Student. | ||
Full Text (.pdf) | 232 KB |
Title: The Collective Behavior ofMulti-Agents System for Tracking a Desired Path | ||
Author(s): Miswantoa, I. Pranoto, H. Muhammad, D. Mahayana | ||
Pages: 52-54 | Paper ID: 116701-3838 IJBAS-IJENS | Published: February, 2011 |
Abstract: The formation of movement in a colony of animals in nature is as important as the
movement itself. In transportation world or multi-agents system (swarm), like in military world,
the formation of aircrafts or ships is also vital. This paper addresses the tracking situation of multi
agents system that models swarming behavior moving along a desired path. This paper tries to
model the movement of the swarm agents to follow the desired path ina bounded 2-dimensional
region. In this paper, we also study the dynamics of the center of swarm relative to the desired
path. We find that the distance between the center of swarm path and the desired path is
exponentially stable. Numerical simulations shows that the agents will aggregate then move
together around the desired path.
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Keywords: Multi-agents systems, swarm center, tracking, numerical simulation. | ||
Full Text (.pdf) | 314 KB |
Title: Injection Mould Analysis in Reducing Warpageof Nylon PA66 Side ArmsUsing Taguchi Method and ANOVA | ||
Author(s): M. F. Ghazali, Z. Shayfull, N. A. Shuaib, S. M. Nasir, M. Mat Salleh | ||
Pages: 55-60 | Paper ID: 117501-6363 IJBAS-IJENS | Published: February, 2011 |
Abstract: Side arm is used as a mould in a latex-dipping process
of manufacturing urinary catheters. A research previously found
that a new side arm can be made from Nylon PA66 using an
injection moulding process which was much more cost effective.
However, there is an unwanted warpage issue that
frequentlyoccurred on each of the Nylon PA66 side arms after the
process takes place. Therefore,thispaper discusses effects of a
number of parameters involved in producing Nylon PA66 side arms
that lead to this warpage issueby means of an injection moulding
process. The parameters concerned are melt temperature, filling
time, packing pressure and packing time. A model of side arm is
designed and simulated using simulation software to imitate the
real operation of an injection moulding process. These parameters
are then analyzed with respect to the deflections occurred using
Taguchi method and further verified by using Analysis of Variance
(ANOVA) technique. At the end of this study, it is found that melt
temperature and packing time play the most significant role to the
existence of warpage.
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Keywords: Side Arms, Nylon PA66, Catheters, Injection moulding,Taguchi Method and ANOVA. | ||
Full Text (.pdf) | 352 KB |
Title: Structural Control for Bitumen Seepages in Imeri, South-Western Nigeria | ||
Author(s): Akinmosin, A, Omosanya, K. O, Ariyo, S. O, Folorunsho, A. F, Aiyeola, S. O | ||
Pages: 61-67 | Paper ID: 118601-4949 IJBAS-IJENS | Published: February, 2011 |
Abstract: Electrical resistivity survey was done to investigate the role of fault as barrier or
conduit for bitumen seepages found inImeri, Southwestern Nigeria.
Two (2) Vertical electrical sounding (1D) with a maximum electrode spacing(AB)
of 700m using schlumberger array, and an electrical resistivity imaging (ERI)
along the same profile using wenner array were used in this research work; the
results were interpreted using WINKLINK and DIPROWIN respectively.
The bitumen horizon was encountered atdepth of ~34.56mand ~20.99m with
resistivity value of 2206 and 4398?m in VES1 and 2. The resultant lithological
logs shows that layers are displaced relative to one another, with younger
lithological units placed on top of older ones, this suggests the presence of a
Normal fault; the fault has an estimated throw of ~28.1m. The 2D survey did not
probe as deep as the VES but the resultidentified the bitumen horizon and
possible fault zones.
The bitumen seepages in Imeri were influenced by the presence of a fault and
absence of a good cap rock. The fault is thought to serve as a conduit for the
migration of the bitumen to the surface. Further fault seal analyses may
incorporate the determination of the Shale Gouge Ratio (SGR) along the fault
zones.
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Keywords: Resistivity, Bitumen, Seepages, Fault, Conduit. | ||
Full Text (.pdf) | 626 KB |
Title: Characterization and Sensing Properties of ZnO Film In FG-FET Sensor System for NO2 Detection | ||
Author(s): W. Widanarto, C. Senft, O. Senftleben, W. Hansch, I. Eisele | ||
Pages: 68-72 | Paper ID: 118901-7676 IJBAS-IJENS | Published: February, 2011 |
Abstract: A new type of NO2gas sensor has been made using the Floating Gate Field Effect Transistor (FG-FET) sensor system. 200 nm ZnO
films were deposited on Si/Ti/Pt electrodes, which are mounted onFG-FET chips. SEM and EDX characterization methods were employed to
study the surface of these films. The change in the work function of the film due to their interaction with NO2
has been measured at various
temperatures and relative humidities. The sensor exhibits high sensitivity and selectivity to 1-20 ppm NO2
at a temperature range between room
temperature and 165°C. With t
50
~10 s, the response time is quite fast.
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Keywords: Gas Sensor, Floating Gate Field Effect Transistor (FG-FET), Zinc Oxide, Nitrogen Dioxide. | ||
Full Text (.pdf) | 591 KB |
Title: Soil Bacterial Response toIntroduced Metal Stress | ||
Author(s): Anyanwu, C. U., Nwankwo, S. C., Moneke, A. N. | ||
Pages: 73-76 | Paper ID: 116501-4343 IJBAS-IJENS | Published: February, 2011 |
Abstract: The responses of aerobic heterotrophic soil bacteria community to different concentrations
of different metals, namely, mercury, zinc and nickel were investigated. The heavy metals
were added to soil at the levels of 50, 100, 200, 300 and 500 µg/g of soil, respectively. The
soil samples were incubated for 28 days during which total aerobic heterotrophic bacterial
counts were taken periodically. The results demonstrated that the growth of bacteria
exhibited responses which were dependent upon the type of metal and level of
concentrations. Mercury at the concentration of 300 and 500 µg/g soil, inhibited growth of
the bacteria by the 28th
day of the study while for nickel, growth inhibition on the 28th
day
occurred for the 500 µg/g. However, for zinc, there was nocomplete inhibition of growth
throughout the experimental period at all metal concentrations. Reduction in microbial
population and loss of microbial diversity is evident as metal concentration increased.
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Keywords: Heavy metals, Soil bacteria, Growth response. | ||
Full Text (.pdf) | 195 KB |
Title: Preparation of Chitosan from Shrimp Shell and Investigation of Its Properties | ||
Author(s): Md. Monarul Islam, Shah Md. Masum, M. Mahbubur Rahman, Md. Ashraful Islam Molla, A. A. Shaikh, S. K. Roy | ||
Pages: 77-80 | Paper ID: 110201-8484 IJBAS-IJENS | Published: February, 2011 |
Abstract: Chitosan was prepared from shrimp processing waste (shell) using the same
chemical process as described for the other crustacean species with minor
modification in the treatment condition. The physicochemical properties,
molecular weight (165394g/mole), degree of deacetylation (75%), ash content as
well as yield (15%) of prepared chitosan indicated that shrimp processing waste
(shell) are a good source of chitosan. The water binding capacity (502%) and fat
binding capacity (370%) of prepared chitosan are good agreement with the
commercial chitosan. FT-IR spectra gave characteristics bands of –NH2at
3443cm
-1
and carbonyl at 1733cm
-1
. X-ray diffraction (XRD) patterns also
indicated two characteristics crystalline peaks approximately at 10° and 20°
(2?).The surface morphology was examined using scanning electron microscopy
(SEM).
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Keywords: Heavy metals, Soil bacteria, Growth response. | ||
Full Text (.pdf) | 296 KB |
Title: Perturbation Technique for Analytical Solution of Fourth Order Near Critically Damped Nonlinear Systems | ||
Author(s): Md. Asraful Alom, Md. Habibur Rahman, B. M. Ikramul Haque, M. Ali Akbar | ||
Pages: 81-88 | Paper ID: 1112701-4646 IJBAS-IJENS | Published: February, 2011 |
Abstract: A technique is developed in this article based on the Krylov-Bogoliubov-Mitroplskii method to investigate the solution of fourth order near critically nonlinear system in the case of and. The method is illustrated by an example and the solutions obtained by this method agree nicely with those obtained by numerical method.
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Keywords: | ||
Full Text (.pdf) | 311 KB |
Title: Effect of Transient Non-Thermal Mobility of CO for CO-NO Surface Catalytic Reaction on Hexagonal Lattice: A computer Simulation Study | ||
Author(s): A. U. Qaisrani, M. Khalid, Samina Naz | ||
Pages: 89-92 | Paper ID: 1112302-5858 IJBAS-IJENS | Published: February, 2011 |
Abstract: Monte Carlo simulation has been used to study the effectof precursor mechanism on a hexagonal lattice for CO-NO
heterogeneous catalytic reaction. The reactive window gets enhanced due to the precursor mechanism. It is observed
that whenever precursor mechanism is introduced in the third environment, the production of CO2and N2starts as soon
as the CO partial pressure (yCO) departs from zero, which verifies the experimental observation. The reactive window
even increases by increasing the range of precursor mobility.
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Keywords: Monte Carlo Simulation, Precursor mechanism, Nitrogen oxides, Carbon monoxide. | ||
Full Text (.pdf) | 179 KB |
Title: Fit Generalized Linear Models by Using of Different Likelihoods | ||
Author(s): Hoda Rashidi Nejad | ||
Pages: 93-97 | Paper ID: 100505-1101-7373 IJBAS-IJENS | Published: February, 2011 |
Abstract: Regression models have wide applications in analysis of data with continues and normal distributed responses. Extended of these
models happens when these distribution of responses are not normalbut they belong to the distribution of exponential family. It is
called generalized linear model(GLM). Statistical inference of glm usually is done based on full likelihood, however computing of full
likelihood is hard in some complex models, that needs using of replacement other likelihoods such as: profile likelihood, conditional or
marginal likelihoods, empirical likelihood and quasi likelihood. There for using these likelihoods is more applicable than full
likelihood. In this research, various likelihood functions for prediction of variables in models are proposed. The main objective of this
research project is to overcome the difficulties of using the full likelihood and its related calculations which has been done by
application of other likelihoods. Also we work on tentative data of productivity of bulldozer and fit models and compare the error of
three models.
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Keywords: Link function, nuisance parameter, quasi likelihood, sufficient statistics. | ||
Full Text (.pdf) | 389 KB |