The study area lies to the south of El-Dakhla Oasis in the central part of the Western Desert, Egypt. It is limited by the latitudes 24°-25°N and the longitudes 28°- 30°E. The main purpose of this work is the investigation of the subsurface structure and the delineation of the main structural elements at different subsurface levels. This study aims also to estimate the basement depth, the basement relief and consequently the thickness of the sedimentary cover. The study is based on acquired aeromagnetic data prepared by "La Compagnie General De Géophysique" for the Egyptian General Petroleum Company (EGPC) and CONOCO (1977), geological information and results of the previous studies in the region.
The study involves the analysis for the aeromagnetic data and generating of reduced to pole magnetic map from which different magnetic maps are calculated. The calculated maps are first vertical derivative map and downward continuation map at depth level 400 m. Trend analysis technique used to define the fault pattern affecting the studied area at different subsurface levels. It is applied to the reduced to pole magnetic map, the first vertical derivative map and the downward continuation map at depth level 400 m of the study area. All results obtained from the interpretation process were combined together to draw the general view of the subsurface structures of the area. The NE-SW, the E-W and the N-S trends are important surface and subsurface (basement) structural trends. This is attributed to that there is a rejuvenation of movements on these old (basement) tectonic trends after the deposition of the sedimentary cover
Basement depth calculation from the aeromagnetic data is achieved using different techniques. The applied techniques included; natural spectral analysis and Euler Deconvolution. The depth values obtained vary from 400 m to 1700 m.

Few studies have addressed racial differences in prostate cancer (PCa) detection between Western and Arabian countries, although PCa has a significantly lower prevalence in Arabic populations compared to Western populations. Therefore, an explanation of this difference is lacking. Serum prostate-specific antigen (PSA) is a valuable marker used to select patients who should undergo prostate biopsies, although the manner in which it is used may require adjustments based on the ethnic population in question. We investigated racial differences in the PCa detection rate between Canadian and Saudi populations. A retrospective analysis was performed of data collected prospectively over 5 consecutive years in urology clinics at the McGill University Health Center (MUHC) and King Saud University Hospital (KSUH). Men who had high (>4 ng/mL) or rising PSA levels and a negative digital rectal examination were eligible. A total of 1403 Canadian and 414 Saudi patients were evaluated for the study; 717 and 158 men, median age 64 and 68 years, were included in the MUHC and KSUH cohorts, respectively, P<0.0001). Median serum PSA, prostate volume, and PSA density values were 6.1 ng/mL, 47.3 g, and 0.12 ng·mL-1·g-1, respectively, for MUHC patients and 5.2 ng/mL, 64.5 g, and 0.08 ng·mL-1·g-1, respectively, for KSUH patients (P<0.0001, t-test followed by one-way ANOVA). In addition, the KSUH group had a significantly lower PCa detection rate among patients younger than 60 years of age and with PSA values <10 ng/mL.

The aim of this paper is to define and study the Legendre matrix polynomials. An explicit representation, a three-term matrix recurrence relation, Rodrigues's formula, hypergeometric matrix representations and Christoffel formula for the Legendre matrix polynomials are given, and the Legendre matrix differential equations of second order are established.

This paper deals with the study of a new hypergeometric matrix function, say, the α-hypergeometric matrix function of the single complex matrix X. Several new results on this function are established. Also, we define and study the composite α-hypergeometric matrix function, and the effect of differential operator on this function is investigated.

This paper deals with the study of the composite Humbert matrix function with matrix arguments . The convergence and integral form this function is established. An operational relation between a Humbert matrix function and Kummer matrix function is studied. Also, integral expressions of this relation are deduced. Finally, we define and study of the composite Humbert Kummer matrix functions.

Water from bedrock frequently contains higher concentrations of natural radionuclides than water from other 22
sources. Groundwater from Assalamia-Alhomira and Juban areas (southeast of Sana'a) and hot spring water 23
from Dempt area (south Sana'a) in Yemen were analyzed for 226Ra, 232Th and 40 K activity concentrations. 24
The average activity concentrations for groundwater from Assalamia–Alhomira area were 4.04 Bql−1 and 25
1.81 Bql−1 for 226Ra and 232Th, respectively, while 40 K was not detectable, while that for groundwater sam- 26
ples from Juban area were 2.95 Bql−1, 0.72 Bql−1 and 34.9 Bql−1 for 226Ra, 232Th and 40 K, respectively. On 27
the other hand, the activity concentrations for hot spring water from Dempt area were 3.48 Bql−1, 1.01 28
Bql−1 and 16.05 Bql−1 for 226Ra, 232Th and 40K, respectively. Also annual effective dose equivalent of ingestion 29
of these waters was calculated. The results showed that the annual dose equivalent obtained in the present 30
study was much higher than the recommended value (0.1 mSv year−1) as reported by WHO. The results 31
were compared with those for drinking water.

This study aims to investigate the floristic composition, biological spectrum, chorological affinities, and describes the vegetation inhabiting the main channel and the deltaic part of Wadi Kid as one of the principal coastal wadis in South Sinai. The life-form spectrum in the present study is characteristic of an arid desert region with the dominance of therophytes (30.43% of the total) and chamaephtyes (26.09%), followed by hemicryptophytes (26.09%), phanerophytes (14.49%), geophytes (1.45%) and parasites (1.45%). Phytogeographically, the Saharo-Arabian element forms the major component of the floristic structure. The investigation revealed that Wadi. Kid is potential shelters of 5 vegetation groups. Detrended Correspondence Analysis (DCA) represented the distribution of the recognized groups along the first two axes. Canonical Correspondence Analysis (CCA) indicated that clay, coarse sand, electric conductivity, chlorides, magnesium and calcium were the main soil parameters which determined the distribution of vegetation in the study area.

A hybrid method for modeling marine controlledsource
electromagnetics, simplified integral equation (IE) (SIE)
modeling, has shown very promising results in 2-D. The computational
gain of SIE is very large for large problems in 3-D.We assess
the accuracy and range of validity of SIE modeling in 3-D through
order-of-magnitude analysis and through an extensive numerical
comparison with rigorous IE modeling. A previously proposed
order-of-magnitude analysis results in a dimensionless parameter
which is easy to use as an a priori indicator for when SIE is valid.
Unfortunately, this parameter is found to be sometimes inconsistent
with our numerical results. Order-of-magnitude analysis for
Maxwell’s equations is then reassessed in an attempt to rectify the
shortcomings of the parameter adapted from the work “Electrical
Impedance Tomography” by Cheney et al. The dimensionless
parameter resulting from the novel order-of-magnitude analysis is
found to have generally good predictive capability. Unfortunately,
this parameter is not suitable for deciding a priori if the use of
SIE is justified for a particular case, since it depends on numerical
results from IE modeling. For future use of SIE, it is therefore
recommended to compare the problem characteristics of the case
at hand with those covered by the extensive numerical comparison
in this paper. From the numerical investigation, it is found that the
accuracy of SIE is very good for resistive targets and for frequencies
lower than about 10 Hz. For conductive targets, the accuracy
is mostly very good for frequencies lower than about 5 Hz but
somewhat more dependent also on other problem characteristics.

Optical potentials for the scattering of K+ from the 12C nucleus are calculated using the folding model. Angular distributions of the elastic and inelastic scattering differential cross sections at 635, 715, and 800 MeV/c are successfully described using these potentials. Good fits with data are obtained without modifying any of the potential parameters. The extracted deformation
parameters and reaction and total cross sections are also considered.

π±–Nucleus scattering cross sections are calculated applying the Watanabe superposition
model with a phenomenological Woods–Saxon potential. The phenomenological potential parameters
are searched for π± scattering from 6Li and 12C to reproduce not only differential elastic cross sections
but also inelastic and total and reaction cross sections at pion kinetic energies from 50 to 672 MeV. The optical potentials of 6Li and 12C are calculated in terms of the alpha particle and deuteron optical potentials.
Inelastic scattering has been analyzed using the distorted waves from elastic-scattering data. The values
of deformation lengths thus obtained compare very well with the ones reported earlier.