Journal of Engineering

This work deals with the determination of contact stress distribution during symmetrical rolling
processes using the finite element method ( FEM).
The results give a clear idea for the type of distribution of the normal and shear stresses along the
arc of contact , for the rollers with a radial depth ratio (r/R) equal to ( 1,0.7, 0.4) .
A study ot the deformation induced in the region of maximum shear stress together with the
location of stress concentration and the maximum stress was achieved.

The world witnesses, a revolution of scientific and technological breakthroughs and the scientific
progress in the field of materials, the launching on the market of new technolory for manufacturing
and employing new elements in buildings, like transparent or opaque diaphragms and with all the sound and heat requirements. This new technology is characterized by substanceless, after it was for
a long time consort with substantial, like information and communication technology and other
developments, which indicate so many factors that pvzzle the architects when reviewing the style of
designing buildings. and making use of these possibilities and transforming them to develop the
expressional force of architecture and improve its performance within its private environment. The
main issue is not that about transforming and import of shapes, materials and techniques, but it is a
matter of education and civilization which opens the way to the future with great care to culture\\\\\\\\\\\\\\\\'s
individuality, because there is no effective education without civilized identity and there is no
identity without intellectual production.

The architectural hospital field can not be empty in its lowermost boundaries of dealing from
capabilities of intemal integration for the hospitals; because they are coherent system of
relationships which depending on changes which affects them through the steps of design,
construction and occupying, which create tools of dealing with methodology whicir participate in
drawing general logical analytic plan.
The main goal of this research is finding a method through which the changes included under
heading constrains can be explained according to the main members which forms the model in its
lowest most levels and system in high level, according to the hierarchy research headings.
In This research we try to deal with determination of general characteristics, which can form the
whole-system- for design and physical system through which the internal relationships of the
system can be organized. First with qualitative technique for system analysis and the method of
balancing which can constrict functional obsolescence and locational obsolescence in system;
which make the subject of change easy in hospital system design according to the tbur objects of
systems which are; purpose or goal. elvironment, hierarchy and operational processes. By these
four objects we can make abase which is controlled by theory explaining the living system and
organic structure.

To study the nonlinear response of composite concrete beams, a finite element analysis is presented.
Material nonlinearities as a result of nonlinear response of concrete in compression, crushing and
cracking of concrete, strain softening and stiffening after cracking, yielding of reinforcement, bond slip,
shear-slip, and dowel action between the precast concrete beams and the cast-in-situ slabs are
considered.
A biaxial concrete model is adopted. Concrete is treated as an orthotropic material with smeared
rotating crack model. The steel reinforcement is assumed to be in a uniaxial stress state and is
modeled as a bilinear material.
A two-dimensional plane stress finite element type is used to model the concrete. Reinforcement is
represented by one-dimensional bar elements. Bond-slip and dowel action is modeled by using
fictitious linkage elements with two springs at right angles. Shear-slip is modeled by using shear
transfer in, face elements with appropriate stiffness values.
Comparison between the results obtained by the finite element and available experimental results of
composite concrete beams is made. The results compare satisfactorily with the experimental ones.

The behaviour of batter piles under inclined compressive loads is of considerable importance,
yet, not enough information is available in literature on the subject. The tests canied out in
this paper were performed on a single inclined pile under various load inclinations in sand.
The results indicate that the highest ultimate compressive load for vertical pile occurs at (30)
load inclination. At small load inclinations, a positive batter pile has greater ultimate
compressive load than that of a negative batter pile. The trend changes at higher Ioad
inclinations. The slip surface analysis is recognised to be too complicated to have a definite
solution.

Simulation of naturally fractured reservoirs is a laborious techniques, because there are two
different porous media in which fluids exist and flow. The porous media exhibit wide variations in
their physical properties. The matrix usually represents the major storage capacity while the
fractures system provides the main paths of the flowing fluids.
Several simulators have been constructed by specialist companies. One is the SimBestII, which is
the product of Scientific Software- Intercomp. In order to simulate a reservoir properly by such
simulator, one should have an idea about the equations and the procedures encountered in it.
In the present study, an attempt has been made to understand the general structure of SimBestll. The
flow equations that are employed in SimBestII are investigated and some of the calculation
procedures are clarified. The exchange term in the flow equations is discussed comprehensively and
the justifications to reduce or magnify the imbibition rate are explored

A new systematic approach is introduced and used to define and study the basic concepts of the
anti-virus system. These basic concepts include definitions, design and analysis criteria, and
classifications. Also, the characteristics of the ideal anti-virus system are defined. To understand
how the proposed design and analysis criteria can be used in practice, the currently available antivirus
products are analyzed using the proposed criteria to see whether they meet the requirements of
the ideal anti-virus system or not.

The steady-state injection into a semiconductor region was studied by many authors and various
solutions were achieved.
The solutions gave the distribution of carriers inside such a region to aid in understanding devices
operation. But extending this problem to a lightly doped semiconductor region was tackled by only
few authors, and the solutions achieved were either numerical or analytical however, the analytical
solution were sufiering from crude approximations,. This paper gives a realistic analytical solution,
which considers both monomolecular and bimolecular recombination factors

In this work, a protocol converter had been designed using formal methods in order to make a
controlling station that supports ADLP 80 (ASEA) protocol stanclard able to communicate with a
controlled station that utilizls another communication protocol called IEC 870 protocol standard, in
a central control system. The two protocols are modeled using communicating finite state machine
(CFSM) models. For simplicity, a converter is constructed for each application function using a conversion
algorithm. This algorithm adopts a protocol data unit approach to derive the converter
machine.

This paper presents a procedure for the free vibration analysis of stiffened conical shell by the finite
element method. The element used is a modified eight-node superparametric shell element. The
effects of the number and cross-section area of stiffeners on the conical shells were analyzed. The
results showed that increasing the number of stiffeners and their cross-'i'ectional area tend to
increase the natural frequency of the conical shell. These results are compared with available
research results and those obtained from MSC\NASTRAN .

This paper presents the development of a flexible, modular, and cost-effective PC-Based CNC
machine controller. Software is designed and developed to perform most of the standard CNC
machines control functions. This software is capable of accepting and inteqpreting the standard
CNC (G-Code) programs. [t also performs the most important CNC machine controller
functions; namely, interpolation and feed rate control. The software has been developed using
the Visual C++ programming language operating under WINDOWS environment. It has high
flexibility and expandability that makes the task of future development easier. System
performance has been evaluated by applying the developed software to control an X-Y recorder,
simulating a CNC machine.

The cost of the FIR filter depends on the cost of its components that are classified into three types
namely buffer, multiplier and adder/subtractor.
The adder/subtractor cover the most FIF. rilter components and any reduction in its cost means high
reduction in the total cost of FIR filter. tn addition, FIR filters with pipeline multiplier the speed of
FIR depends on the speed of adder/subtractor and any improvement in speed will result to
increasing in the total speed of such filter.
This paper shows a proposed method to increase the speed and reduce the cost of the
adder/subtractor by neglecting the rotated carry output. This method reduces the accuracy of FIR
filter, in other words it adds small noise to the output of the filter, but the level of this noise is
inversely proportional with the number of bits in data bus of FIR filter. Therefore this method will
be used with midum noise output filters or with wide data bus (12-bits or more) FIR filter.