Engineering and Technology Journal

The objective of the present work is to realize the kinetic modeling regarding
deactivation of Pt-HY zeolite and monitor the isomerization reaction of n-hexane. The
catalyst has been prepared with o.4% Pt and evaluated during the isomerization reaction
of n-hexane. Based on the results of catalytic investigation, a kinetic model was proposed
to deactivate the catalyst by coke formation. The present method provides information on
apparent overall kinetics as well as deactivation parameters and would seem to provide a
rapid method for screening of reaction/deactivation behavior. Accordingly the
deactivation order was found to be 3.72. The obtained correlation of deactivation predicts
the activity pattern under the applied reaction conditions, closely mimics those observed
experimentally, and spans those obtained from empirical correlations

For semigroups of linear bounded operators on Hilbert spaces, the problem of
being in Cp , 0

developed some new results of a composite semigroups , T(t), 0 < t <¥ which
defined on a Banach space of linear bounded operators on Hilbert space to be in
the Schatten class Cp in strong operator topology.

The research work covers a study of the feasibility of producing
lightweight ceramic thermal insulation bodies used for lining the furnaces
by adding saw dust and AlF3 to the Dewechla clay (Kaolinite).AlF3 is a
chemical waste materials in the Akashat–factories in Rutba to the
Dewechla clay (kaolinite). Finely distributed Saw dust and ALF3 were
added to clay with different weight percentages (0, 15, 25, 35 & 40) Wt%.
Cylindrical shape samples (30mm diameter and 30 mm height) were
prepared by using the semi–dry method, moulding pressure was
(500Kg/cm²). After drying at (110C◦), the samples were burnt at (900, 950,
1000, 1050&1100) C◦. The fired samples were investigated to obtain their
properties, bulk density, porosity ,compressive strength and thermal
conductivity. It was possible to produce ligh-weight ceramic thermal
insulators with bulk density between (700 and 1300) Kg/m³ compressive
strength not less than (25) Kg/cm² and thermal conductivity between (0.2
and 0.4) Kcal/m.h.c

The present work is aimed to investigate the effect of heat treatment on corrosion
resistance of Al-alloy 7020-T6 in sea water, the specimens which manufactured by
(1.5*1.5*0.2) cm, according to ASTM (G31-72) [1] The heat treatment was carried out
at 480°C and water quench after that artificial aging are implemented at temperature
150°C for (1, 4) hours. Microstructure and phase properties after heat treatment and
corrosion test were investigated by optical microscope; X-ray diffraction and
computer potentiodynamic polarization technique have been used to study corrosion
behavior in 3.5% NaCl. The results of corrosion resistance 7020-T6 decrease by
solution heat treatment and, increase the holding time from 1- 4 hour would increase
the corrosion rate, Intermetallics compounds containing zinc represent as the
sacrificial anode and control pitting corrosion in 7020-T6 alloy also, the artificial
ageing time increase the precipitation of zinc and decrease pitting corrosion at 1 hour.

The aim of this work is to give a simple description of a cyclic polytope and a new
approach for finding the coefficient of its Ehrhart polynomials using Pascal triangles.
Theorem for concluding that the roots of a cyclic polytopes are negative is also
given.

In this paper the local existence and uniqueness of the mild solution to some operator
semi-linear initial value control problem were studied and developed by using the
theory of perturbation, composite, admissibility and "Banach contraction principle", in
arbitrary Hilbert space H via perturbation composite semigroup approach.

Fatigue tests were done to determine the S-N curves for Cu 65400 alloy
specimens .The effect of laser shotting on the fatigue properties were investigated
with stress ratio R=-1 at room temperature. Laser shotting of this alloy increases
the life, endurance limits and compressive residual stresses. The largest increase in
compressive residual stresses were observed at stress level 350 MPa

The aim of this work is to determine the residual compressive strength and
splitting tensile strength after exposure to an elevated temperature (between100 to
500 C ◌ْ ) of plain and polypropylene fiber reinforced concrete (PPFRC) in
comparison with specimens exposed to ordinary temperature 25C ◌ْ . High –
performance concrete mixes were produced by using high rang reducing agent
superplasticizer (SP) and 10% high reactivity metakaoline (HRM) as a partial
replacement by weight of cement (350)Kg/m3 . A single concrete mix with HRM,
SP and four PPF contents of (0.25, o.5, o.75 and 1%) by volume were adopted. The
workability of the concrete was kept constant ( slump 100 ± 5mm ).Each group of
specimens ( plain and PPFRC ) was heated to a specified temperature and kept at
the temperature for one hour before being gradually cooled to room temperature
and then they were tested .
The results show at ordinary temperatures 25 C ◌ْ, the addition of fiber volume
fraction (VF%) of (0.25%) increases the compressive ( 20.6% ) comparable to HPC
without fiber . While the addition of ( 0.5 , 0.75 and 1% ) of polymer fibers , the
compressive strength decreased (12.6 , 19 and 33%) respectively comparable to
HPC without fiber . On the other hand the addition of (VF%) of (0.25) increased
splitting tensile strength ( 15%) comparable to HPC without fiber . while the
addition of fiber volume fraction (VF%) of (0.5 ) increased splitting tensile
strength by a percentage which is lower than that in specimens with VF% of 0.25 ,
the increase in splitting tensile strength was ( 6%) comparable to HPC without
fiber at ordinary temperatures
The results also shows that , when (1% ) fibers was used , the splitting tensile
strength decreased ( 10.8%) in comparable to HPC without fiber
At elevated temperature the results show an appreciable decrease in
compressive strength and splitting tensile strength after exposure to temperature
higher than 300 C ◌ْ of both plain and PPFRC
Specimens containing PPF ( 0.25 , 0.5 , and 0.75 %) the percentage of
reduction in splitting tensile strength is lower than that in HPC specimens ( without
fibers ) after exposure to a temperature ( 500 ,300 and 100 C ◌ْ ) comparable to
normal temperature 25C◌ْ .While specimen containing PPF ( 1% ) the percentage
of reduction in splitting tensile strength was higher than specimen without PPF
after exposure to a similar temperature .
On the other hand , specimens containing PPF ( 0.25 , 0.5 , 0.75 and 1 %) the
percentage of reduction in compressive strength is higher than that in HPC
specimens ( without fibers ) after exposure to a temperature (500 ,300 and 100
C ◌ْ). comparable to normal temperature 25C◌ْ

In this paper CdO thin films were prepared by using chemical bath deposition
method. Three different thicknesses of CdO films (84.1nm, 165.1nm, 194.23nm) were
used .x-ray diffraction technique has confirmed the formation of cadmium oxide,
where reveals the changes in films structure with thickness increase. Many structural
properties and constants have been studied and calculated by using the formation from
XRD patterns and ASTM chart such as grain size, FWHM, integral breadth, shape
factor, texture coefficient, and number of layers .These structural constants were
plotted as a function of the films thicknesses. The results indicate that the high grain
size (21.557nm) which was calculated for crystalline plane (111) was corresponding to
the high film thickness (194.23nm), while larger number of layer obtained for the film
thickness 165.2nm

It is well established that the properties of cast metals are greatly improved by
refinement of their grain size. The method employed in this study for the refinement of
grain size of commercially pure aluminum and zinc castings is inoculation of naphthalene
in powder form to the mould prior to pouring the molten metal. The results show that the
addition of naphthalene remarkably suppresses the formation of columnar grains and
refines the structure. Increasing the amount of naphthalene addition also minimizes and
may eliminate the formation of the shrinkage cavity. Furthermore, the ability of castings
for mechanical working increases as the naphthalene addition increases

Submerged arc welding is carried out and efficient metal- joining process widely
used in great importance in many industrial applications, structures of ships, storage
tanks and agriculture equipments. Low alloy steel used under welding conditions
which are, (560 Amp) welding current, (42cm/min) welding speed, (3.25mm) wire
diameter, direct current straight polarity (DCSP) with the joint geometry of single -Vbutt
joint and weld one pass are used for plate of thickness 16mm. After welding, the
components have be submitted to a normalization heat treatment in order to recover
the original mechanical properties of the welds. In this work two different filer metals
both in the as welded condition and after normalizing heat treatment have been studied.
Optical microscopy was used to observe the weld microstructure. Tensile and Charpy
V toughness testing and microhardness measurements were used to evaluate the
mechanical properties of joint. Results show that normalizing reduces the original
columnar structure in the as welded condition to an equiaxial structure. It was observed
a high decrease in the tensile properties specially the yield strength after normalizing.
In respect of toughness, the normalizing heat treatment was observed to increase the
Charpy V energy

The aerodynamic force coefficients of five linear cascade of existing film cooling
turbine blades are evaluated numerically. The blade is geometrically identical to the
first rotor blades of the high pressure (HP) turbine of the F-100-PW-220 military
turbofan. Cascade turbine blade test rig has been designed, constructed, and calibrated
to introduce experimental work for the same flow conditions of the numerical solution
to validate correctness of the numerical results. The numerical simulation shows
acceptable agreement with experimental. Also it was found experimentally that both
lift and drag coefficients are increased slightly with add of film cooling.
The local Mach number distributions outside the boundary layer on both blade
sides of the cascade blade are evaluated numerically and compared with the results of
well known CFD code (Fine/Turbo) for existing gas turbine rotor stage of identical
blade. The computational results obtained for both cases show that the Mach number
distributions trend along both blade sides for rotor stage and cascade are approximately
the same, and the values of Mach number of rotor stage are higher than that for the
corresponded cascade. Also it was found that the Mach number distributions on both
blade sides are reduced in values by the addition of air cooling, and the local Mach
numbers for the cascade case is reduced in values among the rotor stage for the two
cases with and without film cooling on both blade sides

The noise of satellite broadcasting images was statistically analyzed as a
function of values of resistant put in video signal transmission cable in images
adopted in the study. This was made by using a new method includes
mathematically separating of the two noisy effects (additive and multiplicative) by
adopting the mathematical models of noise. We have made an algorithm that
includes effects separation process and finding the site statistical distribution of
them for each band in the used images. In this study the contrast and edges points
of the satellite images were calculated. We can note the increase resistant which
put in video signal transmission cable leads to decrease in contrast and rates of
edge and increase in noise.

This work presents a simulation methodology applied to a human arm. It is
aimed to allow the human-assisting manipulators to perform complex movement
based on electromyography (EMG) signal for patient person in Virtual Reality
(VR). This work achieves better classification with multiple parameters based KNearest
Neighbor for different movements of a prosthetic arm. A K- Nearest
Neighbor (K-NN) rule is one of the simplest and the most important methods in
pattern recognition. The method implements in the 3D space and uses the
MATLAB Ver.2009a approach. This methodology can be used with different
robots to test the behavior of system and the different motion.

The research aims to study the effect of laser surface treatment on mechanical
properties of CK45 steel which is widely used in Bolts, Axles Various,
Connecting Rods and Hydraulic clamps.
Trails of laser hardening were carried out by using CW Nd: YAG laser with
different powers 2.7, 3.3, and 4.3 Watt.
Mechanical tests were done for the specimens who were used in the
research before and after treated by laser such as: Tensile test, Micro hardness.
Also grain size measurement and microstructural evaluation were done by using
computerized optical microscope. The results show that improvement in
mechanical properties at laser power 4.3 watt obviously when compared with
other laser powers.
From tensile test we show that increasing in yield strength, ultimate tensile
strength Poisson's ratio and plasticity constant (k). Also decreasing in Young
modulus, Rigidity of modulus and strain hardening coefficient (n). While
microhardness results show that the highest value was obtained at laser with 4.3
watt power and decreased far from the surface. Metallographic of the specimen
show that refining in grains size after the treatment with laser

This paper deals with the interaction between cavities and adjacent axially loaded
pile in clayey soil using the three dimensional finite element program (ANSYS
11.0).Three dimensional SOLID45 and SOLID65 elements were used to model the soil
and the reinforced concrete pile respectively. Druger- Prager model is chosen to simulate
the non-linear elastic-plastic clayey soil, concrete model is used to simulate the nonlinear
behavior of concrete pile, the steel bars are assumed to be embedded in concrete
section.
A comparison of the behavior of load-settlement curve, shear stress on pile (τxy) and
lateral soil stress on pile (σx) is made for cases of the variation in the cavity positions in
the vertical direction (Z-direction) with case of no cavity. It has been found that the effect
of the cavity on the shear stress along pile length (τxy) and on the lateral soil stress on pile
(σx) is ignored to the depth greater than (20%) of the pile length from the ground level.
Furthermore, the load-settlement curves are quite difference if compared with reference
case of no cavity due to the cavity position near the face of

The present study deals with the prediction and distribution of temperature
of air that is contained in an enclosure (test room). The test room is equipped with a
concrete thermo storage wall (Trombe wall). All walls of the room are thermally
insulated except the one that is facing the sun light. The latter is composed of an
external layer of glass followed by an air gap and the Trombe wall. Temperature
readings were taken on 21st and 22nd of December 2009.
The theoretical investigation of this study is done by solving continuity,
momentum and energy equations using Finite Volume method. The solution
includes the use of the algebraic expressions of turbulent viscosity and diffusion
coefficient using (k - e) turbulent model. A FORTRAN computer program is
built and used to obtain the temperature and its distribution inside the room and
across the wall. The variation of the temperature with time during the two days,
mentioned above, has marked a highest temperature of 40oC at one clock pm . The
comparison between theoretical and experimental results indicated that the rate of
rising of the mean room temperature observed experimentally is higher than that
observed theoretically. However, the latter has faster rate of drop and the wall
keeps the heat for longer time. The comparison is considered acceptable despite of
the observed discrepancies

This study was performed to investigate the effect of addition the toluene
solvent to prepare polymeric blends that are used in the tile manufacture. The first
blend was prepared by adding the toluene solvent to epoxy resin at a weighted ratio
50%. While the second blend was prepared by adding a fixed weighted ratio of
toluene solvent to varied weighted ratio of epoxy and polystyrene resins.
The mechanical (hardness), thermal (thermal conductivity) and electrical
(electrical isolation) properties were applied to find the optimum weighted ratios of
prepared blends when compared with untreated samples of toluene solvent. The
experimental results showed that the properties of hardness, thermal conductivity
and electrical isolation for both of blends were improved by (0,2.5,5,10%), down
each of the hardness (27,21,20,28%) and thermal conductivity (42,20,25,27%) and
the dielectric constant (69,62,61,61%) on respectively compared with those
properties of untreated samples. The improvement of mechanical, thermal and
electrical properties for the second blend was predominant

This study includes preparation of polymer blend consisting of epoxy resin with
NBR (Natural Butadiene Rubber) with70:30 percentage respectively, and this
blend is used as a matrix in a composite material together with short glass fiber Eglass
and carbon fiber HST type as hybrid reinforcement.
Composite material specimens were prepared with a volume fraction
Vf =35 %. SiO2 with particle size 50-75 μm was added in a percentage 3% to
improve mechanical properties, (Impact, tensile strength, hardness) and diffusion
coefficient in water and basic solution. The effect of U.V. radiation was also
studied for different intervals of exposure, for the previously mentioned properties
The results showed that KOH solution had a noticeable effect on the
properties and the radiation affects negatively on the properties more than the water
.The composite material reinforced with carbon fibers had better properties when
considering its resistance to radiation, water, and alkaline solution.

The Architectural movements have adopted many strategies to create
architectural outcomes reflecting their thoughts, goals, concepts, and their special
trends. Among these strategies is Erosen which has been tackled by different
fields of study (artistic and architectural) to describe the characteristics of their
physical outcomes, but it has not received sufficient investigation and analysis in
the different architectural trends and this has triggered the need to carry out the
current research.
The research problem discusses the issue that there is no sufficient theoretical
knowledge concerning the strategy of Erosen, the mechanisms of embodying it, the
degree of its realization in the architectural outcome of both the modern and postmodern
trends, and the nature of variance between them in the way of achieving
Erosen .Thus, the present research aims at investigating and explaining this
variance in details. As to the methodology the research, it has been represented by
a number of steps: First, the research tried to build up a theoretical framework for
Erosen in architecture that clarifies its variables and detailed indicators, Second,
built he research hypotheses have been stated and the samples have been selected
for both the modern and post-modern trends for the purpose of application and
finally the results have been analyzed and the final conclusion have identified