Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
EFFECT OF SUPERPLASTICZER ON SILICA FUME POZZOLANIC CEMENT
883
893
EN
Magdy A.
Abd El.Aziz
Associate Prof. of Structural Eng., Faculty of Eng., Fayoum University
10.21608/jesaun.2010.125545
<span>Silica fume is a by-product in the production of silicon or its alloys. It is very fine material and has a surface area = 20 m2 /gm. It is a siliceous material and contains (85-95) % SiO2 in an amorphous state. It reacts with lime in the presence of moisture at normal temperature to form calcium silicate. The aim of the present work is to study the effect of silica fume substitution on the characteristics of ordinary Portland cement. Different mixes of OPC and various proportions of silica fume with and without superplasticizer were prepared in tap water and hydrated up to 90 days. The hydration behavior was followed by measuring the free lime and porosity. Also, the physico-mechanical properties of each mix were measured such as water of consistency, setting times compressive and splitting strengths. The results have shown that, the water of consistency increases with silica fume content which adversely affects the mechanical properties, especially at a high content (above 8.0 Wt., %). In order to improve the physico-mechanical properties of OPC-silica fume pozzolanic cement, superplasticizer must be added. The free lime content of blended cement pastes decreases with curing time and silica fume contents. Useful conclusions and recommendations concerning the use of silica fume with OPC in the production of blended cements were obtained.</span>
Silica fume (SF),Ordinary Portland cement (OPC),Hydration behavior,Physico mechanical properties
https://jesaun.journals.ekb.eg/article_125545.html
https://jesaun.journals.ekb.eg/article_125545_9b0125ef8145a4ce6920ae5550bcc67e.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
ANALYSIS AND MODELING OF TRAFFIC ACCIDENTS CAUSES FOR MAIN RURAL ROADS IN EGYPT
895
909
EN
Ahmed M.
Ismail
Civil engineering department, Assiut University, Assiut, Egypt
Hassan Y.
Ahmed
Civil engineering department, Assiut University, Assiut, Egypt
Mohamed Ahmed
Owais
Civil engineering department, Assiut University, Assiut, Egypt
10.21608/jesaun.2010.125546
<span>The purpose of this research is to investigate traffic accidents causes and major factors that would be the main reasons for accidents, and to develop a model for accidents on Main National Egyptian Rural Roads. Accidents models would help decision makers to develop the road network to be more safe and minimize the accidents rate. Models were calibrated using accidents records data collected from 19 rural roads from previous studies, and 7 rural roads from filed surveys in Assiut region, "General Authority for Roads & Bridges". The data was splittied in two different types of road sections in location and engineering properties, namely; "Agriculture roads undivided sections", "Desert roads undivided sections”. Simple, Stepwise, and multiple regression analysis have been used to find the effect of each parameter on the accident rate value. Several functional forms are explored and tested in the calibration process. Before proceeding to the development of models, ANOVA statistical tests are conducted to establish whether there are any significant differences in the data used for models’ calibration as a result of differences among the considered roads. The results indicated that exponential model formula represents the highest correlation for all road types .Average daily traffic (ADT), Shoulder width, pedestrian crossing and percentage of trucks have highest effects of traffic accidents on agriculture roads undivided sections, Shoulder width, Radius of horizontal curves and percentage of trucks have the highest effects of traffic accidents on desert roads undivided sections.</span>
accident,modeling,analysis,Road Safety,Rural road
https://jesaun.journals.ekb.eg/article_125546.html
https://jesaun.journals.ekb.eg/article_125546_5b14d251d54055f0b642ce4d07dd0048.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
INFLUENCE OF STRUCTURAL IRREGULARITY IN PLAN FLOOR SHAPE ON SEISMIC RESPONSE OF BUILDINGS
911
928
EN
Hamdy H. A.
Abd-el-rahim
Associate Professor, Civil engineering department, Assiut University
Ahmed AbdElRaheem
Farghaly
Lecturer, Faculty of Industrial Education, Sohag University
10.21608/jesaun.2010.125548
<span>Buildings with irregularity in plan floors appears to be more susceptible to large deformations and damage when they are subjected to strong ground motion than those with regular plan floors due to the additional accidental torsional forces resulting from the existing eccentricity between the center of mass and center of rigidity of the resisting elements. The evaluation of seismic response of irregular buildings in plan is required in order to determine the seismic level of protection afforded to these buildings by new design provisions which have been introduced to Egyptian code (ECOL201)[15]. Therefore it is intended in the present study to evaluate the performance of gravity loaded irregular buildings in plan under earthquake excitation. The structural irregularities in plan were represented by ten irregular configurations to cover and model the torsional effects. A time history analysis with a peak ground acceleration of 0.25g was carried out for these ten models using finite element program SAP2000[16]. The numerical studies for different configurations of irregularity effect were clear in T- plan shape than others. The base shear induced in the perpendicular direction ranged between 40% and 80% of the base shear in the direction of the motion. The results declared the necessity of executing structural separation in these irregular buildings in plan to minimize the induced perpendicular base shear. Many conclusions are deduced and they are believed to be very helpful to the structural engineer in order to improve the knowledge of the subject and to avoid unintended consequences of ECOL.</span>
seismic response - irregularities,floor plan,Top Displacement,base shear-time history analysis,torsional effect
https://jesaun.journals.ekb.eg/article_125548.html
https://jesaun.journals.ekb.eg/article_125548_4319632d55e7d3c77ad069d63e0e9ca9.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
EFFICIENCY OF INTERNAL STRENGTHENING R.C BEAMS WITH RECTANGULAR OPENINGS IN SHEAR ZONE BY USING STEEL PLATES
929
947
EN
Nageh M.
Ali
Demonstrator, Civil Eng. Dept., Assiut University
Mohamed M.
Ahmed
Associate Professor of Structural Eng., Civil Eng. Dept., Assiut University
Mohamed Farag
A.
Professor of Structural Eng., Civil Eng. Dept., Assiut University
Abd Elrahman
Megahid
Professor of Structural Eng, Civil Eng. Dept., Assiut University.
10.21608/jesaun.2010.125549
<span>The provision of transverse openings in floor beams to facilitate the passage of utility pipes and service ducts results not only in a more systematic layout of pipes and ducts; but also translates into substantial economic savings in the construction of a multi-storey building. Over the past several decades, many researchers exerted great efforts to predict and interpret the behavior of beams with web openings [3-9]. They recommended convenient methods for the design of such beams. External strengthening by using external steel plates or external CFRP laminates will be a satisfactory method in the case if it is required to provide new opening in existing beams. In this research it was suggested to use internal steel plates to improve the efficiency of beams with opening. Therefore, twelve R.C beams were tested under static loading up to failure; eleven of them were fabricated with rectangular opening through the web in shear zone while the remaining beam had a solid web. Internal steel plates around the opening were used in strengthening them. The effect of internal steel plate's thickness, and configuration, horizontal steel plate length and concrete grade is investigated. The pattern of cracks and modes of failure were observed. The mid span deflection, the inner edge of opening deflection and the difference between deflections of the two opening edges were measured. The crack and ultimate load were recorded. The results were studied and given in shape of plates, tables and curves.</span>
perforated R.C Beams,Concrete Strength,pattern of cracks,Deflections,steel plates and strengthening of web openings
https://jesaun.journals.ekb.eg/article_125549.html
https://jesaun.journals.ekb.eg/article_125549_e6c1fc3872c2dc0ff412607fee161f2e.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
OPTIMAL ARRANGEMENT OF TEMPORARY FACILITIES IN CONSTRUCTION SITES
949
960
EN
K.M.
Shawki
Assistant Prof., College of Engineering and Technology, AASTMT, Alexandria, Egypt
M.E.
Abd EL-Razek
Prof., College of Engineering and Technology, AASTMT, Cairo, Egypt.
S.A.
Maqboly
M.Sc. Student, College of Engineering and Technology, AASTMT, Alexandria, Egypt
10.21608/jesaun.2010.125553
<span>Site layout planning requires decision makers to identify the planned location of each temporary construction facility on site. These temporary facilities include site offices, workshops and storage facilities. Their planned locations on site have a direct impact on productivity, cost, and duration of construction. This paper presents a computer model called “GASITE” helps construction decision makers to carefully evaluate all feasible locations for these temporary facilities and select an optimal layout that minimize the cost and travel distance between facilities. The optimization problem has been solved using genetic algorithms as an optimization technique .Application of the model is illustrated using an example .The proposed model is efficient and easy to apply and as such should be of interest to construction engineers and practitioners.</span>
Construction,site layout,Genetic Algorithm
https://jesaun.journals.ekb.eg/article_125553.html
https://jesaun.journals.ekb.eg/article_125553_d671f6887a3becb2d91d36e330187996.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
THERMODYNAMIC ANALYSIS FOR COMBINED BRAYTON / RANKINE POWER PLANT
961
977
EN
M.
Abd–El-Halim
Faculty of Industrial Education, Suez Canal Univ., Egypt
W.M.
El-Maghlany
Faculty of Engineering, Ismailia, Suez Canal Univ., Egypt
10.21608/jesaun.2010.125555
<span>This paper deals with parametric of thermodynamic analysis of a gas power plant has 165.1 MW rated power capacity. This plant established as a gas power plant in Mosrata, (Libya) to feed an iron and steel factory. The thermodynamic analysis energy and exergy analysis indicate how much power has been rejected in the exhaust gases in case of gas power plant only. In order to enhance the exergy and energy efficiencies, this study propose a steam unit as a (combined power plant). The gas plant was designed to work under different part load of 0.2, 0.4, 0.6, 0.8, and at full load. Then, the thermodynamic energy and exergy analysis of the plant has been carried out. The energy and exergy efficiencies were calculated according to the first and the second laws of thermodynamics. It is concluded that the overall thermal efficiency can be improved by 9.835% and the exergy can be enhanced by 9.34% at full load.</span>
energy,Exergy,Second law analysis,Power Plant,Combined cycle,Pitch point
https://jesaun.journals.ekb.eg/article_125555.html
https://jesaun.journals.ekb.eg/article_125555_49a0a324d8fbbf2dcd674b8d8ca13ad3.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
TUNING PID CONTROLLERS USING HYBRID GENETIC AND NELDER-MEAD ALGORITHM
979
987
EN
A. A.
Lasheen
Engineer of automatic control, Faculty of Eng. Helwan University, Helwan, Egypt
A. M.
El-Garhy
Faculty of Eng. Helwan University, Egypt
E. M.
Saad
Faculty of Eng. Helwan University, Egypt
elsayedmos@hotmail.com
S.M.
Eid
Faculty of Eng. Cairo University, Cairo, Egypt
10.21608/jesaun.2010.125556
<span>This Paper presents a hybrid genetic and Nelder-Mead algorithm (HGNMA) to determine the optimal proportional-integral-derivative (PID) controller parameters. PID controller exhibits good features, including easy implementation, stable convergence characteristic and good computational efficiency. The HGNMA algorithm is implemented in MATLAB, the results obtained from this hybrid technique is compared with that obtained from Genetic Algorithm (GA) and the conventional PID which is tuned via the Ziegler-Nichols frequency response method. The proposed method is more efficient in improving the step response characteristics such as, reducing rise time, settling time and maximum overshoot.</span>
PID controller parameter,Hybrid Genetic Nelder-Mead (HGNMA)
https://jesaun.journals.ekb.eg/article_125556.html
https://jesaun.journals.ekb.eg/article_125556_3b488e724d60eed5b48235fd02604891.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
SEMANTIC WEB BASED SEARCH AGENT SYSTEM
989
1000
EN
Majid A.
Askar
Computer Science Department, Faculty of Computer and Information, Assiut University, Egypt.
Hesham A.
Hassan
Computer Science Department, Faculty of Computer and Information, Cairo University, Egypt.
Samhaa R.
El-Beltagy
Computer Science Department, Faculty of Computer and Information, Cairo University, Egypt.
10.21608/jesaun.2010.125558
<span>The term "search engine” is traditionally used to refer to crawler based search engines, manually maintained directories, and hybrid search engines. However, current search engines do not fully satisfy the users' needs especially in terms of accuracy and specificity of the results. This paper proposes an approach to build an intelligent search agent system on top of the Semantic Web. The presented system consists of five main parts: the Annotator, the Ontology Parser, the Indexer, the Search Agent, and the Data Repository. Two kinds of search are implemented: keyword based and concept based search. The keyword based search matches a user’s query terms to concepts while concept based search allows a user to choose the concept that s/he want to search for together with some attributes for this concept.</span>
Information Retrieval,Semantic Search
https://jesaun.journals.ekb.eg/article_125558.html
https://jesaun.journals.ekb.eg/article_125558_96ec41c7e61106776ac6cb5adccb6de9.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
DATA MINING TECHNIQUES FOR MISSING VALUE IMPUTATION
1001
1012
EN
Marghny H.
Mohamed
Faculty of computers and Information, Assiut University, Egypt
marghny@aun.edu.eg
Abdel-Rahiem A.
Hashem
Faculty of Science Assiut University, Egypt
hashem_aer2@yahoo.com
M. M.
AbdelSamea
Faculty of Science Assiut University, Egypt
10.21608/jesaun.2010.125559
<span>Imputation is a class of procedures that aims to fill the values which are missed with estimated ones. These methods involve replacing missing values with estimated ones based on some information available in the data set. K-means has been successful in finding missing values for several data sets available such as Bupa, Breast Cancer, Pima, etc. In this paper, we introduce an efficient imputation methods based K-means to treat missing data. Our proposed methods give higher accuracy than the one on given by classical K-means. Experimental results hold on a variety class of data sets.</span>
Imputation,Clustering,K-mean
https://jesaun.journals.ekb.eg/article_125559.html
https://jesaun.journals.ekb.eg/article_125559_23efbf036e2d53069d6413a28265c908.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
WORM DETECTION USING HONEYPOTS FOR WINDOWS ENVIRONMENT
1013
1025
EN
Mansour Ali H
Alqubati
Student from Yemen NIAS
Yousef B
Mahdy
Vice Dean of Faculty of Computers & Information
Hosny M.
Ibrahim
Dean of Faculty of Computers & Information
10.21608/jesaun.2010.125560
<span>Recent cybersecurity incidents suggest that internet worms can spread so fast that in-time human-mediated reaction is not possible, and therefore initial response to cyberattacks has to be automated. In this paper we present a system for detecting known and unknown worms using honeypots. The proposed system detects worms by monitoring connection activity and watching for patterns of traffic that are expressions of some of the essential characteristics of worm behavior. The implementation is a signature-based detection as a first tier and an anomaly-based as a second tier in the detection process. At a network's gateway, the proposed system runs a vantage point from which all traffic into and out of the network is visible. The system employs a honeypot to capture traffic, after discarding whitelisted patterns; as it automatically generates worm signatures which are matched with the signatures of the known worms stored in original database. When a signature is matched, the system reports it by issuing an alert that also includes the IP addresses involved in the transaction. Otherwise, the system monitors the changes in the performance of CPU, RAM and changes in files in the gateway which are considered as indicators to the presence of worms. The proposed system was evaluated using a dataset collected from internet for several days, and potentially showed good results for detecting and collecting information about worms from local network. It was noticed that the performance was increased up to 23% more than other systems that uses honeypots.</span>
honeypot,Worm,Network Security
https://jesaun.journals.ekb.eg/article_125560.html
https://jesaun.journals.ekb.eg/article_125560_5048a9ab30f2cca08ae1a06593278233.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
EVALUATING AND IMPROVING BLASTING RESULTS AT TOURAH LIMESTONE QUARRY- HELWAN, EGYPT.
1027
1045
EN
SAEED S.
ABD EL HAFIZ
Department of Mining and Metallurgical Engineering, Assiut University, Assiut, (State ZIP/Zone), Egypt
MOSTAFA
TANTAWY
Department of Mining and Metallurgical Engineering, Assiut University, Assiut, (State ZIP/Zone), Egypt
ELSEMAN
ABDEL-RASOUL
Department of Mining and Metallurgical Engineering, Assiut University, Assiut, (State ZIP/Zone), Egypt
M. ABDEL TAWAB
ELGENDI
Department of Mining Engineering, Suez Canal University, Suez, (State ZIP/Zone), Egypt
M.M.
El-BEBLAWY
Department of Mining and Metallurgical Engineering, Assiut University, Assiut, (State ZIP/Zone), Egypt
10.21608/jesaun.2010.125561
<span>Evaluation of blast performance is considered of high interest for mine operators to improve blasting results. Within the scope of this study, the aim is to determine the optimum blasting conditions in Tourah-quarry, Helwan, Egypt. Guidelines have been suggested for a step-by-step trial blasts to evaluate blasting results in Tourah quarry. Thirty full scale production blasting events in Tourah quarry have been conducted and the results have been recorded. Two design parameters have been investigated. These parameters are initiation point and primer location inside the blast hole. The objective has been achieving optimum blast results: adequately displaced and swelled muck pile; desired fragmentation degree; less uneven rock face and minimum environmental problems such as ground vibrations, and flying rock.</span>
https://jesaun.journals.ekb.eg/article_125561.html
https://jesaun.journals.ekb.eg/article_125561_88b01d1e80412502c312aa4c822c7f25.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
STATISTICAL DESIGN APPLICATION AND ANALYSIS OF SEPARATION EFFICIENCY IN DAVIS TUBE TESTER
1047
1058
EN
Mahmoud M.
Ahmed
Mining and Metallurgical Engineering Department, Faculty of Engineering, Assiut University, Assiut 71516, Egypt
mamoah@aun.edu.eg
10.21608/jesaun.2010.125562
<span>Wet low intensity magnetic separation studies for a synthetic binary mixture of magnetite and quartz were carried out. The variables studied were particle size, magnetic field intensity, and wash water rate. Experiments were carried out using 23 full factorial designs. The main and interaction effects on the separation efficiency were evaluated using Yates' analysis. The optimum magnetic separation conditions were calculated by the method of steepest ascent. A concentrate with 98.9% magnetite at 87.2% component recovery and 86.3% separation efficiency was obtained at following optimum conditions: 200 µm particle size, 3190 Gauss magnetic field intensity, and 402 cm3/min wash water rate.</span>
Davis Tube,Separation Efficiency,Yates' Analysis,Interaction Effects,T-TEST
https://jesaun.journals.ekb.eg/article_125562.html
https://jesaun.journals.ekb.eg/article_125562_94f2859d616c3016bdab917f7741a37f.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
ACTIVATING THE ROLE OF THE ARCHITECTURAL EDUCATION AS A CATALYST TO PRESERVE THE RESPONSIVENESS OF THE URBAN HERITAGE JEDDAH HISTORICAL AREA
1059
1076
EN
Nabil
Al Kassar
Assistant Professor, Department of Architecture Faculty of Environmental Design, King Abdul Aziz University Jeddah – Saudi Arabia
10.21608/jesaun.2010.125563
<span>The goal of this research is to examine a methodology in Architectural Education to test the responsiveness of the Urban Heritage environment. The problem was that the historical area in old Jeddah city was not properly covered in both the urban or the architectural academic studies, some efforts were done but they were not enough to fill the gap,. Furthermore there was a full absence of any image that should be given to the students to preserve or develop the local historical precedent. The author tried through an organized study to raise the awareness of his students about this part of knowledge. A tool was designed to help students understanding the local historical environment with a sound architectural and urban study that can reveal its urban and architectural problems and then in turn suggest specific and clear solutions that can be applied in the real world The research sample was designed in a multi level system that can be examined practically in the specified location. Seven levels were examined permeability, variety, legibility, robustness, visual appropriateness, richness and personalization. All data were collected through site surveys, the urban reports that were saved by the Faculty of Environmental Design, and other data from previous workshops held by Jeddah Municipality about historical Jeddah. Some questionnaires were designed as a demand for some qualities examined in the study. The research proves the success of the examined methodology to specify the key problems of the environment and then in turn to suggest and recommend the proper solutions for them.</span>
Permeability,Variety,legibility,Robustness,visual appropriateness,Richness,personalization and historical Jeddah
https://jesaun.journals.ekb.eg/article_125563.html
https://jesaun.journals.ekb.eg/article_125563_5dd07939178ec29a070285e5591f9cad.pdf
Assiut University, Faculty of Engineering
JES. Journal of Engineering Sciences
1687-0530
2356-8550
38
No 4
2010
07
01
TYPICAL AND ATYPICAL CHARACTERISTICS OF YEMENI ARCHITECTURE
1077
1100
EN
Sabri Awad
Al-Tarimi
Assistant lecturer at the Department of Architecture - Faculty of Engineering, Hadramout University
arch.sabri@yahoo.com
Magdy Mohamed Radwan
Hamed
Head Architectural Engineering Department - Faculty of Engineering, Assiut University
mradwan@yahoo.com
Shawkat
Elkady
Associated Professor, Architectural Engineering Department - Faculty of Engineering, Assiut University
shawkat12@gmail.com
Mamdouh Ali Yusuf
Ali
Lecturer, Architectural Engineering Department - Faculty of Engineering, Assiut University
mamdaliy@yahoo.com
10.21608/jesaun.2010.125564
<span>Yemen has a great variety of climatic and topographic characteristics, and the building materials, too. This led to the emergence of various types of building architecture and city planning in the various geographic regions. This calls for the necessity of gathering, tabulating, and classifying these works in terms of time and place in order to draw the characteristics of each region, and every era.. The problem of the research is that there are no previous rules or studies which addressed the classification and tabulation of architectural characteristics, particularly in Yemeni cities, the thing that requires gathering and classifying these works. This paper aims to analyze the Yemeni architectural products, tabulate it, and draw its constant typical characteristics and the growing atypical ones - over time and under the influence of human and environmental parameters. The research addressed introduction consisting of (the problem, the aim, the methodology). The discussion also to the historical stages of Yemeni architecture, and a theoretical method for classifying the architectural characteristics of the Yemeni architecture. The paper ended by confirming the existence of constant architectural characteristics in all buildings of Yemeni cities and regions. Despite the variance in climatic and topographic conditions, they may be named the typical characteristics. There are architectural characteristics that differed from one region to another, in spite of the similar customs and traditions and the similarity of climatic conditions. These were named the atypical characteristics.</span>
Architecture characteristics,Typical & atypical,Yemen architecture
https://jesaun.journals.ekb.eg/article_125564.html
https://jesaun.journals.ekb.eg/article_125564_0be254b495493f4cec4de889598d2316.pdf