TORSIONAL STRENGTH OF STEEL FIBER REINFORCED CONCRETE
Muhammad
I. Rjoub
Civil Engineering Department, Faculty of Engineering Technology, Al-Balqa' Applied
University. Amman 11134, P.O. Box 15008, Jordan
author
Mazen
A. Musmar
Civil Engineering Department, Faculty of Engineering Technology, Al-Balqa' Applied
University Amman 11134, P.O. Box 15008, Jordan
author
text
article
2007
eng
The addition of steel fibers in reinforced concrete improves the toughness and the tensile strength of the obtained steel fiber reinforced concrete (SFRC). The latter property enhances the shear strength and the torque moment capacity of SFRC which mainly depend on the tensile strength. The current study is targeted towards developing an expression that is based on the thin walled tube (space truss) analogy adopted by American concrete Institute (ACI). In the proposed expression, the effective tensile strength of concrete in pure torsion in addition to parameters that are in accordance with thin walled tube (space truss) analogy are introduced as independent input parameters. Literature survey is carried out to collect experimental data pertinent to the torsional strength of SFRC beams. Based on regression analysis a new mathematical relationship that predicts the torsional moment for fiber reinforced concrete is derived.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
1
8
https://jesaun.journals.ekb.eg/article_111368_61d16384f0e0159e607adc7aedffd52f.pdf
dx.doi.org/10.21608/jesaun.2007.111368
THREE-DIMENSIONAL MODELLING FOR REINFORCED CONCRETE BEAMS WITH OPENINGS BASED ON NONLINEAR ELASTIC-DAMAGE THEORY
H.
Madkour
Civil Engineering Dept., South Valley University, EGYPT, 81542, Aswan
author
K.
AHMED
Civil Engineering Dept., University of Assiut, EGYPT, Assiut
author
text
article
2007
eng
The objective of this paper is presenting a new three-dimensional nonlinear elastic damage theory for simulating reinforced concrete elements. More attention was devoted for simulating of the nonlinear behaviour of the reinforced concrete beams with opening based on rigorous thermodynamic basis. The new developed theoretical approach takes into consideration the nonlinear elastic behaviour and the deteriorated state of the concrete materials. Finally, the introduced nonlinear concrete model is verified by various numerical simulation of experiments carried out in order to analyze the proposed behaviour of reinforced concrete beams under monotonic static loading. A comparison with experimental results available in literature is performed in order to validate the proposed model. A very good agreement was achieved.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
9
27
https://jesaun.journals.ekb.eg/article_111370_c8ec345cedd9b92689814db18d6893f9.pdf
dx.doi.org/10.21608/jesaun.2007.111370
PREDICTION OF SHEAR STRENGTH OF HIGH STRENGTH REINFORCED CONCRETE TEE BEAMS
Eng. Khaled
Abdelsamee
Engineer, Sohage building house organization
author
Dr. Mhamoud
Hosni
Lecturer of Structural Eng., Civil eng. Dept, Assiut University.
author
Yehia. A.
Hassanean
Civil Department, Faculty of Engineering, Assiut University, Egypt.
author
Prof. Housni
M. Sogier
Professor of Reinforced concrete structures, Civil eng. Dept,
Assiut University
author
text
article
2007
eng
Results of an theoretical investigation of the shear strength of reinforced concrete tee beams made from high strength concrete are summarized in this paper. In addition to the effect of both flange to web width ratio of tee beams and compressive strength of the concrete, the effect of other variables such as shear span to depth ratio, percentage of both tension steel and web reinforcement were taken into consideration in predicting shear strength of high strength reinforced concrete tee beams. Finite element method was used to analyze twenty six beams subjected to two point static loading. Proposed equation to estimate the shear strength of the analyzed beams was developed. The predicated shear strengths by the proposed equation were compared with Zustty, ACI code, Egyptian code.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
29
52
https://jesaun.journals.ekb.eg/article_111371_47a2c1c81beb368b707db775bb3af7db.pdf
dx.doi.org/10.21608/jesaun.2007.111371
BEHAVIOR AND BONDING CHARACTERISTICS OF SELF-COMPACTING CONCRETE
Ashraf
M. Heniegal
Civil structures dept., faculty of industrial education, Suez Canal univ.,
Suez, Egypt
author
Walid
S. Elsayed
Civil structures dept., faculty of industrial education, Suez Canal univ.,
Suez, Egypt
author
text
article
2007
eng
Self-compacting concrete, also referred to as self-consolidating concrete, is able to flow and consolidate under its own weight and is deaerated almost completely while flowing in the formwork. It is cohesive enough to fill the spaces of almost any size and shape without segregation or bleeding. This makes SCC particularly useful wherever placing is difficult, such as in heavily-reinforced concrete members or in complicated formworks. Considering the economy and the durability of our present concrete structures, the quality and the density of the concrete cover, as well as the compaction of the concrete are main parameters [1]. The objectives of this research were to compare the Splitting Tensile Strength and Compressive Strength values of self-compacting and normal concrete specimens and to examine the bonding between the coarse aggregate and the cement paste using the Scanning Electron Microscope. Cylinder specimens (8″ by 4″) were tested for Splitting Tensile and Compressive Strength after 28 days of standard curing, in order to find out if self-compacting concrete would show an increase in these strengths and a better bonding between aggregate and cement paste, compared to normal concrete. The mix design used for making the concrete specimens was based on previous research works from literature. The water – cement ratios varied from 0.3 to 0.6 while the rest of the components were kept the same, except the chemical admixtures, which were adjusted for obtaining the self-compactability of the concrete. All SCC mixtures exhibited greater values in both splitting tensile and compressive strength after being tested, compared to normal concrete. The splitting tensile strength increased by approximately 30%, whilst the compressive strength was around 60% greater. In addition, the SCC tensile strengths after 7 days were almost as high as those obtained after 28 days for normal concrete. This was possible due to the use of mineral and chemical admixtures, which usually improve the bonding between aggregate and cement paste, thus increasing the strength of concrete. Images taken from concrete samples having water-cement ratios of 0.3, 0.4, and 0.6, using the Scanning Electron Microscope, have shown that the widths of the physical interface micro cracks were greater for normal concrete than for self-compacting concrete, which implies that the aggregate-cement bonds were better for SCC than for normal concrete.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
53
69
https://jesaun.journals.ekb.eg/article_111401_3f3866f915fd721d6594134305968a2b.pdf
dx.doi.org/10.21608/jesaun.2007.111401
ENERGY BALANCE MODEL FOR NATURAL VENTILATION OF GREENHOUSES
Ahmed M.
Abdel-Ghany
Mechanical Power Engineering Department, High Institute of Energy,
South Valley University, Aswan, Egypt
author
text
article
2007
eng
Energy balance methods currently used to estimate the natural ventilation rate of greenhouses ( ma ) assume that the input energy to the greenhouse is the transmitted solar radiation. An average value for the cover transmittance ( c ) is usually used to estimate this energy. However, this estimate includes a large error due to the spatial variation of c in the greenhouse. These methods also give negative values of ma at low solar radiation levels (e.g. in the morning and afternoon). The purpose of this study was to develop a simplified energy balance model to estimate the value of ma precisely. In this model, all modes of energy were treated at the outer surface of the cover to avoid the error caused by using an average value of c . Required environmental parameters to be used in the model were measured inside and outside a single-span glass-covered greenhouse with a floor area of 26 m2 located in the Tokyo area, Japan during four sunny days (Sept. 29 to Oct. 2., 2005) The greenhouse was naturally ventilated using two roof ventilators (0.6 m 5 m). Diurnal variations of ma were estimated and compared with the results of other models and showed the necessity of applying the present model. The estimated value of ma was in the range between 0.11 kg s -1 and 2.25 kg s-1 and these results were in accordance with those measured and reported in the literature. The results also confirmed that outside wind at a speed less than 2.5 m s-1 has no significant effect on the value of ma and the value of ma resulting from the greenhouse thermal balance depends mainly on temperature difference of air between inside and outside the greenhouse ( T ). A linear correlation between ma and T was provided that can be used to estimate the required ventilation rate to maintain the air temperature in the greenhouse at a desired level.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
71
92
https://jesaun.journals.ekb.eg/article_111422_7a71cbd5626f6695e23f6369824a41fd.pdf
dx.doi.org/10.21608/jesaun.2007.111422
MODELING OF A TURBOCHARGER WITH THE DIESEL ENGINE AND CONTROL OF COMPRESSOR SURGE
Ahmed
Sayed Hassan
Mechanical Engineering Department, Assiut, University, Assiut, Egypt.
author
text
article
2007
eng
The main target for the present work is to study how to prevent the turbocharged diesel engine from the very dangerous problem of compressor surge. Different controllers to broaden the region of stable operation of the compressor, and thus, improve diesel engine performance were investigated. In the first, a simple model for the turbocharger with the diesel engine is created out. This model includes nine states, which represents the different subsystem components: air filter, intake manifold, intercooler, exhaust manifold, exhaust system, exhaust gas recirculation, compressor and turbine. Effects of each system components on the engine performance have been investigated. The second part, investigates the compressor surge phenomenon, its dangerous on the diesel engine stability and range of stable flow operation. Also, different techniques to suppress or for controlling the surge phenomenon and increase of the range of stable operation of the compressor were carried out. These techniques are the changes of engine intake manifold volume, throttle gain, auxiliary plenum, closed coupled valve and bleed valves. Comparisons of the present theoretical results with the available previous experimental and theoretical results were carried out. The results show that the required power for the compressor was increased by increasing the losses through the air filter and the intake manifold. The engine volumetric efficiency and the output power are increased by increasing the intake manifold pressure. With increasing the residual gas fraction, both the exhaust manifold temperature and the engine output power decrease. Decreasing the volume of the engine intake manifold increases the engine stability. The throttle valve with new gain as a controller improved the compressor range of stable operation by about 33% and about 15.4% improvement in pressure coefficient at low flow rate. Use the closed-coupled control valve as a controller for compressor surge gives an enhancement in compressor stable flow range of about 25 %, and 10.8% in pressure coefficient. While, the auxiliary plenum and the bleed valves give improvement in surge point about 20% and 16% respectively. The present work shows good agreement in comparison of available experimental data from the previous investigations
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
93
116
https://jesaun.journals.ekb.eg/article_111423_8a79bbcd8c945cd2613cf9a5ed5c03b1.pdf
dx.doi.org/10.21608/jesaun.2007.111423
THEORETICAL ANALYSIS OF TRANSCRITICAL CARBON DIOXIDE VAPOR COMPRESSION CYCLE
B.
Saleh
Mechanical Engineering Department, Faculty of Engineering,
Assiut University, Assiut, Egypt.
author
text
article
2007
eng
In the transcritical carbon dioxide vapor compression cycle heat is rejected in a gas cooler at supercritical pressure. At supercritical heat rejection the refrigerant temperature and pressure are independent on each other and one of the most important parameters affect on cycle performance is the pressure on the heat rejection side called the high pressure. A theoretical analysis shows the effect of high pressure, superheat, evaporator and gas cooler exit temperature, and gas cooler exit temperature approach on performance of a transcritical carbon dioxide vapor compression cycle was investigated in this study. The study defines an optimal high pressure which gives a maximum coefficient of performance and suggests that the cycle should operate at or near its optimal high pressure in order to keep its maximum coefficient of performance. The high pressure will also affect the cooling capacity and this effect can be used for boosting capacity at high ambient temperatures. The effect of gas cooler exit temperature and compressor inlet temperature on the optimal high pressure also was investigated. The study shows that the optimum high pressure is mainly a function of gas cooler exit temperature and compressor inlet temperature, while the value of the maximum coefficient of performance is dependent on the gas cooler exit and evaporating temperature. The study also indicates that the superheat of the gas at compressor inlet will have a positive effect on the coefficient of performance when operating with high heat rejection pressure at high ambient temperatures with high evaporating temperatures.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
117
130
https://jesaun.journals.ekb.eg/article_111424_d0c275a6b00b1e7e73d843c6b32d991e.pdf
dx.doi.org/10.21608/jesaun.2007.111424
BANDWIDTH RESERVATION ALGORITHM FOR WIRELESS CELLULAR NETWORKS
Ibrahim
Ismail Ibrahim
Faculty of Engineering, Helwan University , Cairo, Egypt
author
A. S.
Ali
Faculty of Engineering , Helwan University , Cairo, Egypt
author
A. F.
Ghanim
Telecom Egypt , Wireless net. Planning Dept , Cairo, Egypt
author
text
article
2007
eng
This paper presents an advanced bandwidth reservation technique to improve Quality of Service (QoS) by reducing the forced call termination during handoff. One solution to ensure continuity of on-going calls and reduce the forced call termination during handoff is to predict Mobile Station (MS) trajectory and do resource reservation in advance. So, we propose a new scheme that uses an accurate mobility prediction algorithm to predict MS next location and uses this data in bandwidth reservation scheme to improve QoS. The performance of the algorithm is evaluated via simulations. The simulation results show that our algorithm reduces handoff call drop rate without over reserving the resources hence it improves bandwidth utilization and reduces new call blocking rate.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
131
143
https://jesaun.journals.ekb.eg/article_111408_d12358b8f07f66dd125b121d3cd233ef.pdf
dx.doi.org/10.21608/jesaun.2007.111408
OPTIMIZATION OF ROUTING PROTOCOLS FOR SUPPORTING QOS OVER MOBILE AD HOC NETWORKS (MANET)
M. K.
Ahmed
Helwan University, Electronics & Communications and Computer
Engineering Department, Cairo, Egypt.
author
Hedia
Ramadan
Helwan University, Electronics & Communications and Computer
Engineering Department, Cairo, Egypt.
author
Dr. Osama
El Ghandour
Electronics & Communications and Computer Engineering
Department, Helwan University, Cairo, Egypt
author
text
article
2007
eng
Wireless Ad Hoc networks are relatively new and are gaining ground in research due to promises they offer. Wireless Ad hoc networks do not require predefined configuration and have no fixed infrastructure. They are selforganizing and self-configuring networks. Several protocols have been developed that vary in the performance and complexity. Most routing protocols for mobile ad hoc networks, such as: Ad Hoc On Demand Distance Vector Protocol (AODV), Dynamic Source Routing (DSR) are designed without explicitly considering quality of service of the generated route. These routing protocols provide the capability for establishing minimum hop paths between nodes on a best effort basis regardless of QoS. There is a new proposed scheme named Hierarchical Dynamic Source Routing (HDSR) supporting Qos over mobile ad hoc network (MANET) has been attracting significant current research interest. In our work, we evaluate the aspects of Qos concerning this protocol compared to the other schemes. The performance aspects we study are fraction of routing overhead, end-to-end delay, total capacity, MAC control packet capacity and throughput. We have shown that distribution of Forward Nodes (FN) in the network is important for optimization of the performance figures. We present an efficient and adaptive FN selection mechanism for HDSR as well as optimization of number of FNs in a given scenario.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
145
161
https://jesaun.journals.ekb.eg/article_111411_7b0a52d3865aadf5fbc5a5f6c34e6c76.pdf
dx.doi.org/10.21608/jesaun.2007.111411
STATIC TOOL ENVIRONMENT FOR RULE TERMINATION ANALYSIS BY REFINED EVOLUTION GRAPHS
Hany
Harb
Faculty of Engineering, El-Azhar University, Egypt
author
Hamdy
Kelash
Faculty of Electronic Engineering, Menouf, 32952, Egypt
author
Ahmed
Shehata
Faculty of Electronic Engineering, Menouf, 32952, Egypt
author
text
article
2007
eng
A new algorithm for static rule termination analysis within active databases is introduced. This algorithm uses evolution graphs which simulating rule processing statically and considering both rule activation and deactivation. This algorithm has been refined for some cases that cannot be assured of termination this refinement by using Refined Evolution Graphs and analyzing transactions and triggers. A Static Tool Environment is proposed that can be used in termination analysis algorithm. The Static tool proposed is suitable for this algorithm where its component can execute the proposed algorithm. We show that several termination analysis algorithms are captured with our algorithm. The proposed algorithm tests rule termination is presented considering deferred and detached executions. The proposed algorithm turns out to be practical and general with respect to various rules languages and thus it may be applied to many databases
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
163
176
https://jesaun.journals.ekb.eg/article_111412_50a624200ecd6ccba802e66e35d8ad7e.pdf
dx.doi.org/10.21608/jesaun.2007.111412
AN EFFICIENT RATE ALLOCATION SCHEME FOR TRANSMISSION OF IMAGE STREAMS OVER BINARY SYMMETRIC CHANNELS
Usama
Sayed Mohammed
Electrical Engineering Department,Faculty of Engineering,Assiut University,
Assiut, Egypt
author
Safwat
M. Ramzy
Electrical Engineering Department, Faculty of Engineering,Assiut University,
Assiut, Egypt
author
text
article
2007
eng
In this paper, a novel image transmission scheme for the transmission of SPIHT image coding streams over the binary symmetric channel (BSC) is proposed. The main idea behind this scheme is that the output of the SPIHT image coding will be sent related to its significant information. The modified SPIHT coder will generate three groups of bitstream. The significant bits, the sign bits, and the refinement bits are transmitted in three different groups. The optimal unequal error protection (UEP) of these groups is proposed. The RS codes and the RCPC codes are used to test the effectiveness of the proposed scheme in each case. The simulation results indicate that the proposed scheme provides significantly better PSNR performance in comparison to well-known robust coding schemes.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
177
188
https://jesaun.journals.ekb.eg/article_111414_19f833c5c78b50e465aa1d80f30854cb.pdf
dx.doi.org/10.21608/jesaun.2007.111414
C0MPREHENSIVE NEWTON-RAPHSON MODEL FOR INCORPORATING UNIFIED POWER FLOW CONTROLLER IN LOAD FLOW STUDIES
M. Z.
EL-Sadek
Electrical Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt.
author
M.
Abo-Zahhad
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
A.
Ahmed
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
H.E.
Zidan
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
text
article
2007
eng
Flexible AC Transmission Systems FACTS include unified power flow controllers (UPFC). Incorporation of a UPFC by a comprehensive Newton-Raphson power flow model into an existing MATLAB NewtonRaphson power flow algorithm is the subject of this paper. Unlike existing UPFC models available in open literature, this UPFC power flow model is modified to set control of active and reactive powers and voltage magnitude in any combination or to not control all of them. A set of analytical equations has been derived to provide better UPFC initial conditions. Their solution algorithm exhibits quadratic or near quadratic convergence characteristics. Based on this model, it is possible to estimate the UPFC control variables and the UPFC converters ratings. Also the effects of the UPFC coupling transformers impedances on the UPFC control variables and converters ratings are clarified and highlighted.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
189
205
https://jesaun.journals.ekb.eg/article_111418_53d6ff73cf82136248c3c4a97b639fd2.pdf
dx.doi.org/10.21608/jesaun.2007.111418
INJECTION POWER UPFC MODEL FOR INCORPORATION OF UNIFIED POWER FLOW CONTROLLER IN LOAD FLOW STUDIES
A.
Ahmed
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
M. Z.
EL-Sadek
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
M.
Abo-Zahhad
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
H.E.
Zidan
Electrical Engineering Department, Faculty of Engineering, Assiut
University, Assiut, Egypt.
author
text
article
2007
eng
This paper is devoted to the incorporation of the steady-state model of the unified power flow controller (UPFC) in power flow programs using a UPFC injection model. The adopted UPFC injection model is based on the representation of UPFC in steady-state conditions by two voltage sources in series with certain reactances. Using this UPFC power flow model, the effects of UPFC control variables on system voltage magnitude, line active and reactive power flow, total system losses, slack bus generated active and reactive power and the injected reactive power from voltage controlled buses are illustrated. Also, the effects of the UPFC location and the UPFC series converter coupling transformer reactance on power flows and on total system real power loss are studied. It is found that using this UPFC power flow model it is possible to show the power flow characteristics inside the UPFC converters, themselves.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
207
224
https://jesaun.journals.ekb.eg/article_111420_b2ef7c7bc262ddbcf6f21442b61bc8b1.pdf
dx.doi.org/10.21608/jesaun.2007.111420
CALCULATION METHODOLOGY OF ENGINEERING RISK FACTOR AS A FUNCTION OFTIME AS A CONSTRAINT VARIABLE
Zohair
Khalaf Ismail
Department of Chemical Engineering; Faculty of Engineering Technology
Al-Balqa Applied University; Marka-Amman, Box: 15008, Jordan
author
Subhi
K. Abderrezaq
City University-Tricities, WA 99352 USA
author
text
article
2007
eng
Approach and implementation to access the risk factor associated with complex activities is the purpose of conducting analysis through "p,t" type tests. Complex activities, stiff opposition and inhospitable environment could be associated with increasing the risk factor. A driving simulator model was taken as a four cylinder type car with some more additional equipments fitted into it to simulate a realistic driving environment with a cell-phone as a distracter. The distracter was accomplished by the driving activity while using cell-phone, but the risk that drivers take upon the cell phone was unclear. The performance of drivers proved to be affected badly by a number of distracters that could lead easily to be evolved in crash. Also, the relationship between the difficulty level of a phone conversation and the resulting distraction use to be unclear. The study showed the effect that easy and difficulty cell phone conversations have on driving performance . Participants engaged in a cell phone conversations showed to have higher variations in accelerator pedal position, slower driving with more variations in speed, and a higher level of workload regardless of the difficulty level of the conversation. It is found that the risk factors were 0.86 and 0.79 according to "p" and "t" tests (tables 3 and 4). Also, results constraints variables of same types of tests " t, p" showed that certain increment from 0.68 to 0.80 suggesting that the additional stress reduced the variables leading to higher performance and increasing those towards higher risk factors.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
225
235
https://jesaun.journals.ekb.eg/article_111425_e5d252314e1d51e4557517cc27b3c029.pdf
dx.doi.org/10.21608/jesaun.2007.111425
IMPACT OF TECHNOLOGICAL DEVELOPMENTS AND MARKET REQUIREMENTS ON TEACHING OF ARCHITECTURAL ENGINEERING
Dr. M. A. Sallam
AL-Madhaji
رئيس قسم الهندسة المعمارية
کلية الهندسة ـ جامعة صنعاء ـ اليمن
author
text
article
2007
eng
Many engineering concepts, hypothesis, principals, and teaching programs have been changed in many countries as a result of recent technological developments. The new technologies offer many resources and facilities for teaching and practicing architectural engineering leading to great savings in time and efforts. Architects need to acquire new knowledge and qualifications to utilize such resources and to deal with the new market requirements for better benefits and incomes. However, many questions may be raised about responses of The Arabic and Islamic Universities to such issues and their plans for updating teaching programs and other subjects to enable their graduates to follow up the new market and technology requirements. This paper aiming at studying the suitability of current teaching programs in different Arabic-Islamic universities for meeting the new technology and market requirements. To achieve such aim this research follows the following methodology: Analysis study for engineering teaching goals and how they influenced by the new technological developments. Comparative studies for teaching programs of architectural engineering departments in Arabic-Islamic universities. Analysis study for possibility of teaching programs in Department of Architectural Engineering at University of Sana’a (case study) to meet the new technology and market requirements.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
237
256
https://jesaun.journals.ekb.eg/article_111426_47405a49d532222e937c52bdf82fd759.pdf
dx.doi.org/10.21608/jesaun.2007.111426
THE CONTINUOUS URBAN DEVELOPMENT AS A NECESSITY FOR THE PREVENTION AT ENVIRONMENTAL POLLUTION
Dr. Mohamed
Masoud Abd El-Allh
Faculty of Architecture and Planning – University of King Fesal Damam – Kingdom of
Saudi Arabia
author
text
article
2007
eng
The operation of interaction between the human environment with the natural environment throughout the ages in order to find a creative environment is what we name as the science of environment and its relation to man or what is called “ Ecology”, this expression is ancient in existence to some extents, by intermingling the two Greek words together : Oikos which means housing and Logos which means the science of teaching the relation between humans and their surrounding . It is not easy to realize in our societies our close environmental relation to the rest of humanity, even if this connection is not shown clearly nowadays, but we began to realize that we do from “ Urban Development “ might lead to great consequences in the future. In reality, the results of these consequences has been felt all over the world. Therefore society has to apply one manner for environmental development since we have knowledge and technology to treat the several environmental problems which face us. We really need now most is the strong will to cause change. This change should be strengthened by the co-operation of all specialists who prepare and apply environmental policies. We need the help and co-operation between people in order to spread out the sustainable development not only in the field of construction, but in all developing areas on earth.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
257
284
https://jesaun.journals.ekb.eg/article_111427_273b55d19c1b8b1d98513863c3aed5c8.pdf
dx.doi.org/10.21608/jesaun.2007.111427
ANALYTICAL STUDY OF THE SAFETY ISSUES FOR CHILDREN IN THE LOW INCOME NEIGHBORHOOD STREETS IN RIYADH, SAUDI ARABIA
Dr. Omar
S. BaHammam
College of Architecture and Planning King Saud Univeristy
author
text
article
2007
eng
Cities give serious attentions to designing their streets and lay them out to provide for the safety of pedestrians on the road especially children. Existing street situation does not encourage pedestrians nor does it provide for the safety of users especially children. The study looks at the existing situation of neighborhood streets with an analytical eye in regard to children safety and trying to determine the existing obstacles in relation to safety of children and the design of streetscape. To address this issue, a fieldwork survey was conducted assess the existing situation in the randomly selected neighborhoods in the city and determine the safety challenges facing children in streets. The main benefit of this research is to pull the attention to the issue and to set a new methodology for studying the issue of children safety and open a new frontier that is in urgent needs in our daily life.
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
285
298
https://jesaun.journals.ekb.eg/article_111428_4bd7fe695135ab95464a6f1e2795c341.pdf
dx.doi.org/10.21608/jesaun.2007.111428
THE MODERN ARCHITECTURAL ENVIRONMENT AND ITS EFFECTS ON THE TOWN PANORAMA VIEW (CASE STUDY ON THE SANA'A CITY OUTSIDE THE OLD SANA'A TOWN WALL )
Dr. Mohammed
M. Al Olofi
Assistant Professor Dept. of Architecture College of Engineering University of
Sana'a
author
text
article
2007
eng
Environment to those interesting community, scholars and prior to that architects' engineers could be classified into three parts . The natural environment, the social and of course the industrial. All that we mean in this study is the last . We mean by that the group entire of components related to man's activity, and man surroundings as a whole. This would contain the buildings, parks , the squares , the open recreational centers , roads , highways , bridges and industries etc. In additional to that comes the factor of the environmental effects. Hence the modern architectural environmental in tremendous many towns have been affected by a lot of the factors that caused towns to lose the optimal ideal properties , despite all efforts and attempts exerted in aims of enhancements and developing. This could be due to several reasons. The significant reason is the focusing ,mainly on the solely abstract economical prospective dimension without taking under consideration the other important factors. .Thus consequently and throughout time the reflect of that had worked to affect nature of the architectural environment as a whole. An effect of that also is negatively affects man's livelihood, guanine needs and related convenience . For instance towns were and still the favorite rendezvous centers for people to meet in , to arrange their various interests. Hence within towns there took place the different man's activities such the cultural, the political and the commercial exchanges, a thing objectively expresses the real wholeness of the urban life activities. Whereas in fact any town could never ever be just seen and deemed as a consistent of just several number of buildings , businesses neighboring each other without taking under serious consideration the fact for the material constructional architectural components besides the behaviors of the co workers on.(1) Another r factor is that the sound smoothness eye can not realize at seeing beauty serenity in absence of the intact sound planning art - craft and esthetic architecture besides the safety and the structural erecting and architectural environment which influences the users as a whole feeling of impressiveness such as love and terror , desire and pleasure. Hence the most important constructional architectural environment in favor of Sana'a city is the absence of sound planning that could smoothly cope with and be in a harmony with the modern development whether that in the eco social dimensions or in the non full exploitation of the optimal chances of the private sector participation or due to the non exploitation of the local , Arab or foreign investments in concern.. These factors besides several others had effected nature of the architectural environment on Sana'a city . It affected the general view of Sana'a city , similar effects are on its inhabitants and even on its visitors. This research rises as a responsive for the discussion effects of the architectural environment prospects, on its inhabitants, The research at the same time tackles the periodically intervals transitions in history witnessed by Sana'a, together with the related range of the of that responses on the city and on its people In addition tackles the significance of the architectural environment, the functions related that determine the architectural environment and the development and renaissance of architecture movements , their effects and results on cities promote and enhancement as a whole and in particular on Sana'a city The research concludes to a group of outcomes associated by comments and recommendations
JES. Journal of Engineering Sciences
Assiut University, Faculty of Engineering
1687-0530
35
v.
No 1
no.
2007
300
315
https://jesaun.journals.ekb.eg/article_111429_39c21110daf97f72a9010d0857ebe5b1.pdf
dx.doi.org/10.21608/jesaun.2007.111429