Print ISSN: 1681-6900

Online ISSN: 2412-0758

Volume 25, Issue 3

Volume 25, Issue 3, May 2007, Page 76-406


Study of Spectroscopy and Thermodynamic Properties for CHCl3 Molecular and Influence Its of Bonds (C-H) and (C-Cl) on Spectroscopy Properties

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 98-110

In This research studies spectroscopy and thermodynamic properties of
Chloroform molecule CHCl3, Also the study includes plot of molecule potential
energy curve of (C-H) and (C-Cl) bonds, Then the dissociated energy which was
(2.65 eV) for (C-H) and (1.88eV) for (C-Cl), And study covers the vibration modes
of CHCl3 and frequencies which were active in Raman and IR spectra due to the
change of polarization and dipole moment at molecule. Orbit energy Homo was (-
10.879 eV) for higher orbit energy occupied and (0.7972 eV) for Lumo lower orbit
energy unoccupied. Also total charge density and electrostatic potential were
calculated from the diagrams in two and three dimensions. Thermodynamic
properties such as Heat of Formation (ΔH˚f) kcal/mol, Enthalpy (H) cal/mol, Heat
Capacity (Cp) cal/k/mol, Entropy (S) cal/k/mol, and Gebb's energy (G) kcal/mol
were calculated at room temperature and were (-20.874, 3502.104, 16.339, 77.974,
-19.734)respectively.

Artistic Articulation of Interior lighting for Hotels Lobby

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 111-130

Many studies concentrated on the lighting subject in interior spaces.
Some of these studies considered lighting as an artistic factor in the public
interior space, but it didn’t present a clear picture about achieving artistic
articulation of interior lighting in public reception spaces specifically hotels
lobby. This study is trying to explore building principles of artistic
articulation of interior lighting in public reception spaces (hotel lobby).
The research hypothesis that an artistic articulation building
influenced by structural and meaningful principles of interior lighting in
public reception spaces of hotels lobby.
To tackle research problem, it crystallized a conceptual model,
represented by lighting elements, art, and articulation in public reception
spaces in hotels lobby, secondary and main assumption types have been built,
included four major types of Artistic assumption modes to the lighting which
are as follows:
Dramatic, spacious or restful, dramatic spacious and spacious
dramatic type.
The semi-empirical research depended on surveying descriptive method and
observational check list as experimental tool. Intentional sample was selected,
including (5) interior spaces as research settings. Perspective shot was used as
analytical unit. Data was gathered through 4 surveying phases that lasted for
(3) months approximately. T-test and was used to treat data statistically using
(SPSS) program.
The results proved, the importance and activity of artistic articulation
types which are represented by restful dramatic, spacious or restful dramatic
restful, and dramatic in public reception spaces of hotels lobby.
Final conclusion revealed that potentiality of varied usage of artistic
articulation representing by dramatic, spacious and others being result out
from the reaction of there two types represented by spacious dramatic and
dramatic spacious in public reception spaces in hotel lobby. Finally,
recommendation was discussed.

Assessing The Dead Loads Effect on the Dynamic Behavior of Plates by Using Finite Elements Method

Abbas Abdel-Majid Allawi

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 328-333

In this research, a rectangular plate element for the finite elements
method, which takes into consideration the effect of dead loads, is proposed.
The element stiffness matrix that includes the effect of dead loads is derived. It
is shown that the stiffness of plate increases when the effect of dead loads is
included in the calculations. The validity of the proposed method is confirmed
by numerical example and the results show a good agreement when compared
with that obtained from the closed-form solutions. The proposed method
based on a finite elements formulation is more easily applied to plate’s
structures under different support conditions and various types of dead loads

Artificial Neural Network Model for Predicting Nonlinear Response of Uniformly Loaded Fixed Plates

Ayad Amjad Abdul-Razzak; Salim T. Yousif

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 334-348

An artificial neural network (ANN) model has been developed for the
prediction of nonlinear response for plates with built-in edges and different
sizes, thickness and uniform loads. The model is based on a six-layer neural
network with back propagation learning algorithm. The learning data were
performed using a nonlinear finite element program, the set of 1500x16
represent the deflection response of load. Incremental stages of the nonlinear
finite element analysis was generated by using 25 schemes of built-in
rectangular plates with different thickness and uniform distributed loads.
The neural network model has four input nodes representing the uniform
distributed load, thickness, length of plate and length to width ratio, four
hidden layers and sixteen output nodes representing the deflection response.
Regression analysis between finite element results and values predicted by the
neural network model shows the least error. This approach helps in the
reduction of the effort and time required determining the load-deflection
response of plate as the FE methods usually deal with only a single problem
for each run while ANN methods can solve simultaneously for a patch of
problems

Evaluation of Sediment Transport In Kirkuk Irrigation Channel

Muhanned J.Al-Kizwini; Saleh Issa Khassaf; Ahmed Najat Bahjat

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 349-357

In this research, the sediments transport and how to compute their amount
have been studied in Kirkuk irrigation channel. Empirical methods for
computing sediments discharge in the channel have been discussed
emphasizing on six methods (Blench, Graf, Laursen, Yang, Inglis- Lasey and
Engelurd–Hansen). The applications of these methods required the selection
of (24) sections along the channel in order to measure the hydraulic
parameters of the different cross sections in addition to the slope along
the channel. Samples of water sediments have been taken at each section in
addition to bed samples.
The research introduces an equation for computing sediment load in
Kirkuk irrigation channel depending on the data of (14) sections in the
channel using statistic- MS program.
The validity of this equation has been verified with the application to
the remaining (10) sections data in the channel and the results are very close
to the field measurements .

Load-Slip Relationship in Modified Push-Out Test (Experimental Work)

Mukhallad A. Z. Al-Sa; ady

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 358-369

In this work, a modified push-out test is proposed to study the load-slip
relationship in steel-concrete-steel sandwich beams. This relation is one of the
most important factors that are required in the analysis and design of steelconcrete-
steel sandwich beams with partial interaction. The diameter of the
connector is assumed to be variable while the other parameters are kept
constants. The modification in this test in comparison with the standard test
concentrated on the use of steel tube- concrete slab- steel tube instead of concrete
slab- steel (I-Section)- concrete slab (in Standard Test) in order to be more
compatible than the standard test in modelling the steel-concrete-steel sandwich
or double-skin beams. The stud is suggested to be threaded along the whole
length, connected to the tube by a nut (the separation between the layers is
eliminated and only interlayer slip is assumed to exist) and the connector passes
to the other tube through the concrete slab (thus the connector is subjected to
double shear force). These cases maximize the function of this stud. Five dial
gages are used; one at the base, and two at each side in order to measure the slip
at each stud. An experimental relationship of load-slip is carried out to simulate
the behaviour of this type of connection in steel-concrete-steel sandwich
construction.

Investigation of Contact Interface Between the Punch and Blank in Deep Drawing Process

Waleed Khalid Jawad

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 370-382

In this work a commercially finite element program code (ANSYS 5.4), is used
to perform the numerical simulation of the deep drawing operation.
A simplified axisymmetric model of cylindrical cup of (44mm) outer diameter,
(28mm) height and (0.5mm) sheet thickness of annealed mild steel of 0.15%
carbon content, has been developed, and the numerical results are compared
with the experimental work. Six types of punches of (43mm) diameter with
punch profile (nose) radius of {P=3,6,9,15,18, & 21.5 mm}have been
constructed and used, and the value of die profile (nose) radius is kept
constant to (d=6mm).
This work aims to study the effect of punch profile radius on the interfacial
contact between the punch and the blank, punch load, thickness variation over
the produced cup wall, localized strains and stresses distribution across the
inner and outer wall of the drawn part, the height and amount of spring back
of the drawn part.
The results show that ;
The length of contact distance between the blank and the punch increases as
the punch nose increases and its value approximately is equal to punch nose
radius. Increasing the punch profile radius leads to increasing the cup height
about (20 % for FESimulation & 18 % for experimental work), and
increasing the value of springback to about (1.75 % for FE Simulation &1.25
% for experimental work)) for punch nose radius ranging from (3 to 21.5mm).
The greatest thinning is seen to occur with spherical punch due to great
stretching of the blank over the punch head. The punch load decrease slightly
with increasing punch nose radius .The more generous punch radius
(spherical nose), the more gradual rise of the punch load and larger the
punch travel. The stress and strain distributions for all geometries chosen are
similar in shape, and have the same trend and approximately the same values
for both inner and outer wall of the drawn part.

Improvement of Marshall Properties of the Asphalt Concrete Mixtures Using the Polyethylene as Additive

Lamia A. Ahmed

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 383-394

In order to increase the durability of highway pavement specific requirements
are needed to control the quality of pavement materials. Therefore, the aim of
this study is to make and test laboratory specimens in order to characterize
asphalt-polymer and aggregate mixtures by using results from conventional
test procedures. The research work covers six percentages of polymer content
those are (2%, 4%, 6%, 8%, 10%, and 12%) percent by weight of asphalt
content. The polymer modified mixes were designed in accordance with
Marshall method and the engineering properties of these mixes were
determined. The engineering properties of the control and polymer modified
mixes (stability, flow, bulk density, percent of voids in total mix, and percent
of voids filled with asphalt) were evaluated by conventional test (Marshall
test).The test results show that the engineering properties of polymer modified
mixes meet the requirements of the S.O.R.B. specification for the asphalt mix
used in the construction of surface course. The Marshall stability for modified
mixes is higher than of control mixes.

On-Line Current-Based Condition Monitoring and Fault Diagnosis of Three-Phase Induction Motor

K. S. Krikor; Ali H.Numan

Engineering and Technology Journal, 2007, Volume 25, Issue 3, Pages 395-406

A stator current measurement has an important role in condition monitoring
and fault diagnosis of induction motors. For instance, the eccentricity, rotor
bars and end ring breaks, shorted stator windings can be detected by analyses
based on stator current measurement. This paper addresses the application of
stator current spectral analysis technique for the detection and localization of
abnormal electrical and mechanical conditions that indicate, or may lead to, a
failure of the induction motors. The effects of stator current spectrum are
described and the related frequencies are determined. In the present
investigation, the frequency signatures of some asymmetrical motor faults are
well-identified using signal processing techniques, such as Welch method for
spectral density estimation. In fact, experimental results clearly illustrate that
stator current spectral analysis using Welch method is a very good tool to
detect faults in induction motors. These faults are shaft speed oscillation,
eccentricity, broken rotor bar, and end ring cracked.