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Convergence of a Kind of Partial Upwind Finite
Element Method for Compressible Flow of Contamination from Nuclear Waste in
Porous Media
Abbas Al-Bayati,
Saad A. Manaa,
Ekhlass Saadallah
Abstract
A non-linear parabolic system is derived to describe compressible nuclear
waste disposal contamination in porous media . Galerkin method is applied
for the pressure equation and a kind of partial upwind finite element
scheme is constructed for the concentration of the brine of the fluid, the
trace concentration of the ith radionuclide and the temperature of the
fluid. This methods satisfies the discrete maximum principle and converges
to the solution in norm
.
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A New Video Segmentation Technique and Evaluation
Khalid A.
Kaabneh
Hamed S. Al-Bdour
Abstract
This paper introduces a new
segmentation technique that takes motion into consideration. The technique
works by dividing each frame into blocks of a certain size; starting from a
reference frame, each block is compared with all the blocks in a region
surrounding the corresponding block in the next frame. To measure the
similarity between frames, a technique combining mean square error and
hit-ratio is used; the mean square error is used to measure the similarity
between blocks, and the percentage (hit-ratio) of blocks passing that
similarity test that must exceed a preset threshold. Different values of
block sizes, motion displacement, and hit-ratios are considered in this
paper to optimize segmentation. A block size of 16, a displacement of 6 and
a hit-ratio of 70% are found to be the best. Our segmentation technique has
advantages over others such as motion sensitivity, adjustable segmentation
granularity, and close agreement with subjective notion of visual segments.
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Exchange anisotropy in Cobalt films
A. Al-Sharif
Abstract
The magnetic behavior of Co/ CoO bilayers prepared by rf
sputtering was studied for Co layer thickness ranging between 100 and 290
A. X-ray diffraction results indicated that the films are composed of hcp
Co and fcc CoO. Magnetic measurements showed that the coercivity of the
films decreases with increasing the temperature and, film thickness. The
field cooled films showed a shift in the hysteresis loops. The hysteresis
shift was found to decrease with increasing temperature and film thickness.
No shift was observed at temperatures above 250 K.
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Lattice Green’s Function of Perturbed Body Centered Cubic Lattice, Revisited
R. S. Hijjawi
Abstract
An expression for the Green’s function of Body Centered
Cubic (BCC) lattice is evaluated analytically and numerically for one and
two impurities interacting with the first nearest-neighboring host atoms.
The density of states (DOS), phase shift and scattering cross section are
expressed in terms of complete elliptic integrals of the first kind.
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Energy Levels and Transition Probabilities for Fe XI
Mohamad. R.
Issa
Mozah. M. Al –Rabban
Abstract
Theoretical calculations of transition energies, electric dipole oscillator strengths and transition probabilities for the Fe XI ion are presented. These calculations are based on the relativistic Hartree-plus statistical exchange model using Cowan’s program. The data represents the 48 fine-structure levels belonging to the configurations (1s2 2s2 2p6) 3s2 3p4, 3p6, 3s1 3p5, 3s2 3p3 3d1.
Comparison with different theoretical models is made. The average percentage difference between the theoretical calculations and the experimental results for the energy levels is 3.4%. For the dipole oscillator strengths and the transition probabilities, the agreement between the different models for strong lines is very good while the difference between the models for the weaker lines vary up to 50%.
The 3p6 configuration has a strong effect on the lower levels,
while the configurations that include excitations to n= 5 and 6 are not
important to the lower levels under study.
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Mineralogy, Geochemistry And Diagenesis Of Kaolin Minerals In The Wadi Araba Area: Jordan.
Majdi O. Barjous
Abstract
Kaolinite and dickite have been recognized within the Disi Sandstone Formation in the Wadi Araba area. Scanning Electron (SEM) and Transmission Electron Microscopic (TEM) data indicated that both kaolinite and dickite are characterised by a high degree of crystallinity with pseudohexagonal forms, such features indicate an autochthonous genesis (diagenetic) primary-type. Dickite crystals were concentrated in the coarse silt size (up to 60 microns), and were mostly formed during late diagenesis by transformation of pre-existing kaolinite or fine dickite minerals, and are considered as secondary-type minerals (sedimentary origin). The genesis of kaolin deposits within the Disi sandstone in the Wadi Araba area can be considered as a combination of the residual and sedimentary processes. The residual (primary-type) kaolin is the most dominant within the sandstones of the investigated area.
The quantitative results of the
Disi sandstone indicated that -20 microns and -63 microns size fractions
comprise 80% and 60% kaolin minerals. Kaolin forms about 10% of the exposed
rocks of Disi sandstone in the Wadi Araba area. The quantity and quality of
the kaolin minerals as well as the geological and geomorphological setting
of the source rock suggest a possible economical value.
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Evaluation of Tectonically Crushed Granite from Southern Jordan as a Source for Feldspars
Majdi O. Barjous
Abstract
Representative samples from the crushed plutonic igneous rocks that are exposed east of the Aqaba region (southern Jordan) were collected and studied for evaluation as source for industrial feldspars. The plutonic igneous rocks from Wadi Al Jeshiah are highly deformed and crushed as a result of the Neogene tectonic regime of the Dead Sea Transform fault system. The intensity of crushing in the investigated area is directly related to the distance of the igneous rocks from the boundary faults and the shear zones.
The
mineralogical, chemical and physical characteristics of the tectonically
crushed granite suggest their economical importance as a good source of
commercial feldspar. The results provide a database for future
investigations on feldspars.
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An Assessment Study to show a Geostatistical Model for Spatial Distribution for Soil Salinity in the Dead Sea Region in Jordan
Q. Y. Tarawneh
O.A. Al-Khashman
Abstract
This study is concerned with the spatial variability of some soil properties such as pH and electric conductivity (EC). Besides that, the study depicts the spatial variability of some ions (cation and anions) of the Dead Sea (DS) soil namely, Na+, Cl‑, Ca2+, K+, Mg2+, HCO3_, NO3_ and SO4‑- . The geostatistical techniques show similarities among the semivariogram models.
All semivariogram models are
constructed in this study in order to understand the behaviors of spatial
distribution. The spatial distributions of soil properties show differences
from site to site which is expressed in terms of angles, where the larger
the angle the weaker the correlation. The semivariograms show two regions,
each one represents different type of soil. The first region starts from the
DS till 80 m; except Mg semivariogram model which is extended up to 60 m.
This region is characterized by larger correlation angles, which
consequently reflects lower correlations among the samples of each
semivariogram model in this region. The second region started from 80 m up
to 1000 m. The angles of correlation in this region are closed to each other
that reflect better correlation among the samples of this region in each
model. An estimation of pH at pivot site shows good correlation. The result
is calculated with relative error of about 2%. The standard regional
dependence function (SRDF) and the radius of influence figures are
constructed in this study in order to understand the interrelations among
the distance and the variation of soil salinity.
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Land Valuation Practices in Jordan: Survey Study
Nedal
Al-Hanbali
Ihsan Al-Qudah
Abstract
The appraisal of real estate is one of the most critical topics in human’s daily life. It earns its significance from the many implications, which have a wide range of people, owners, buyers, credit agencies and tax assessors. In Jordan, real estate appraisal is used for the purpose of taxation, loans, and transfer of ownership, construction and other land use.
The objectives of this study was to evaluate the appraisal method of real state used in Jordan and to figure out the extent to meet the international standards by identifying the valuation procedures and techniques used by the appraisers of properties. For this objective, the Jordanian literature that deals with these procedures used for estimating the market value and some specified ownership interests have been reviewed.
A survey was conducted to study and evaluate the current
practices via a questionnaire form distributed and filled by evaluators from
government and private sectors. The data have been analyzed and the results
of the statistical analysis revealed that majority of valuators (84.5%) were
still using the conventional method, the comparison approach. About 50% of
the evaluators were ignorant with valuation methods such as the income and
the cost approaches, and 70% believe that valuation process is moody and not
based on scientific rules.. The results concluded that at least double of
the previous efforts have to be conducted by the Department of Lands and
Surveys and other societies to uplift our valuation society to follow the
international standards. In addition to that DLS has to enforce this through
proper legislation.
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Improving the Reliability of DTMs Generated from High Resolution Satellite Imagery by Enhancing the Automatic Stereoscopic Matching**
Mahmoud M. S. Albattah
Abstract
This paper presents a simplified method of epipolar resampling and a matching algorithm for automatic generation of Digital Terrain Model (DTM) from high-resolution satellite imagery. Instead of the very complicated or very simplistic models for the epipolarity, the “quasi-epipolar lines” are calculated as simple circular arcs which leads to great simplification in the resampling process, reduction of time consuming and to an increase in reliability.
The matching algorithm severely reduces the problems of matching and provides dense, accurate and reliable results. It leads to an impressive improvement of all accuracy indicators. Using the method proposed in this paper, we could achieve high accuracy and minimize time execution in the process of the DTM extraction.
The results of an extensive
test using a stereo SPOT model over South France are reported. A strict
sensor mathematical modeling is used here for accurate generation of
epipolar images. DTMs derived from the automatic matching with different
options and the qualitative comparison of the results based on a sufficient
number of check points and a reference DTM is presented.
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