DIYALA JOURNAL OF ENGINEERING SCIENCES

In this investigation,sustainableHigh Performance Lightweight Aggregate Concrete (HPLWAC) containing recycled crushed clay brick from construction and demolition waste as coarse lightweight aggregate (LWA) and reinforced with mono fiber, double and triplehybrid fibers in different typesand aspect ratioswere produced.High Performance crushed brick lightweight aggregate concrete mix with compressive strength of 41.2MPa,oven dry density of 1930kg/m3at 28 days were prepared. The Fibers used including, macro hooked steel fiber with aspect ratio 60 (type S1),macrocrimped plastic fiber (P) with aspect ratio 63, micro steel fiber with aspect ratio 65 (type S),and micro polypropylene fiber (PP)with aspect ratio 667. Six HPLWAC mixes were prepared including, one plain concrete mix (without fiber), two mono fiber reinforced concrete mixes (reinforced with either steel fiber type S orplastic fiber with0.75% volume fraction), two double hybrid fiber reinforced concrete mixes (0.5%steel fiber type S +0.25%polypropylenefiber and 0.5% plastic fiber +0.25% steel fiber type S),and one mix with triple hybrid fiber (0.25%steel fiber type S1+0.25%polypropylenefiber +0.25% steel fiber type S). Fresh (workability and fresh density) and hardened concreteproperties (oven dry density, compressive strength, splitting tensile strength, flexural strength and absorption)were studied. In general mono and hybrid (double and triple) fiber reinforced HPLWAC specimens give significant increases in splitting tensile strength and flexuralstrengthcompared withplain HPLWAC specimens.The percentagesincrease in splitting tensile strength for specimens with mono steel fiber are55.8%, 65.9%, 82% and 91.9%,while for specimens with mono plastic fiber the percentages increase are 34%, 45.5%, 61.5%and 71.2% at 7, 28, 60, 90 days age respectively relative to the plain concrete. The maximum splitting tensileand flexurestrengths wererecorded for triple hybridfiberreinforced HPLWAC specimens.The percentagesincrease in splitting tensile strength for triple hybrid fiberreinforced specimens are57.2%, 68.6%, 87.5%and 101.8%, while the percentages increase in flexure strengthare 84%, 95.6%, 6665% and 7.67% at7, 28, 60 and 90 days age respectively relative to the plain concrete specimens

Reinforced concrete wide beams (WBS) have been used in structural buildings to reduce floor heights, reinforcement congestion and facilitate the run of services under the floor. This paper presents the test results of four full-scale simply supported wide RC beams of (30 MPa) concrete strength under four-point bending up to failurein which their flexural behavior was studied. One of these was un-strengthened with carbon fiberreinforced polymer sheets (CFRPs), the three other beams were strengthened by using externally (CFRPs) bonded with epoxy with deferent width in flexural zone: beam strengthened with (30%) of cross-section width of beam, beam with (60%b) and beam strengthened with (100%b), The performances of the tested beams were measured as deflection, crack patterns, ultimate load, steel and concrete strains,and modes of failure. All beams with the same dimensions, reinforcement ratio and designedas under reinforced concrete (flexural failure). The test results showed that the strengthened beam with (60%b) provided the best flexural capacity as compared with the other strengthened beams. This beam increasing flexural capacity up to (29%) as compared with the control beam.

This researchpresents an experimental study to investigate the shear behavior of high strength self-compactingconcrete slender beams. The experimental program includestesting seven beamswithconstant size of (150mm height ×125mm width×1000mm length) to study the effect of shear span to effective depth ratio (a/d), longitudinal reinforcement ratio (ρw) and shear reinforcement ratio (ρv) on shear behaviorfor these beams. The experimental results showedthat, increase shear span to effective depth ratio (a/d) has pronounced effect on decreasing diagonal cracking loadandultimate shear strength andincreasingthe ductility ratio, as (a/d) increase from 2.5 to 3.0, the decreases indiagonal cracking load and ultimate shear strength arewith percentagesof 17.8% , 21.6% respectively, while the ductility ratioincrease with percentage of 16.7%. Also the results showedthat the longitudinal reinforcement ratio (ρw) has significant effect on the gain in shear bearing capacity and ductility ratio, as increasing of longitudinal reinforcement ratio from 3.191% to 6.383% the increases in diagonal cracking load, ultimate shear strength and ductility ratio arewith percentages of 43.8%, 46.6% and 37.0%respectively.Furthermore the results revealed that the vertical shear reinforcement has the major effect in improvement the shear behavior of thesebeams, however, using shear reinforcement (ρv) with percentage of 0.502% results in increase diagonal cracking load, ultimate shear strength and ductility ratio with percentages 50.7%, 63.6% and 48.1% respectively as compared with beam without shear reinforcement. Also presence of vertical shear reinforcement changedthe mode of failure from the brittle to ductile

n the lastyear, with a hugeusage of wireless enforcementand where nearly everything which was controlled by humans is being automated by using robots. In this paper a control system of the mobile robotic arm was built by using a PS2 joystick and the microcontroller (Arduino UNO) and sends the command by the master Bluetooth (HC-05) that represents the transmitter part. Where the receiver receives the data by the slave Bluetooth (HC_05) to generate the specific motion by take the command from Arduino UNO. The purpose of this paper is to design and implement a mobile arm robot for dangerous and difficult places that humans can't reach it and make the specific tasks.

The main idea is to insert the secret message (one to eight texts or one to eight gray images) in the three LSB of the cover image (colorimage). The color cover image RGB model(R channel, G channel and B channel) is separated into three cover images(the red cover, green cover, and blue cover). Each one of these three cover images is used to hide secret messages (gray image (two secret images in R channel, three secret images in G channel and three secret images in B channel) or text). The experiments and comparative studies show that the algorithms are characterized by many features of the ability of hiding huge data, and then the ability of extractingsecret message without errors. Beside the reconstructed image, has efficacies (to human acquaintance) according to peak signal to noise ratio (PSNR) and mean square error (MSE), also retain both the explicitness and the characteristics of the both secret message and cover image

The selected mapping (SLM) is an effective technique for peak-to-average power reduction (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. SLM has high computational complexity due to the computation of multiple IFFTs. In this paper,lowcomplexity SLM is proposed based on a novel simplified IDFT algorithm developed such that it does not involve any complex arithmetic. The proposed SLM, with Ucandidate signals, achieves a computational complexity reduction ratio of (1−1????)%with respect totraditional SLM. This reduction is at the expense of using limited memory and negligible degradation in PAPR reduction performance. The computational core of the proposed SLM is implemented on the Spartan 3E XC3S500E FPGA platform to highlight its hardware implementation issues and to verify its effectiveness.

Ingist, e-learning ispedagogic tool in a computer system or a framework that cement you to impart anywhere and at any time. Today e-learning is particularly convey though the internet, although at past it was delivered using a mixture of computer-based methods like CD-ROM. The development of technology has the geographical gap is bridged by using a way that can imagine you inside the classroom. E-learning show the strength to participate articles in all types of formats such as word, videos, slideshows, and PDFs. Conducting webinars(Online courses)and communicating with professors via chat and message forums it isachoice obtainable to users.This paper presents idea of e-learning system based on Computer Science Departmentthrough it listed all the common subjects of these departmentwith a many types of media of teaching that deliver text, audio, image, animation, streaming video and includes discussion forums, Chat rooms, Wiki spaces, Online Messaging, Journals. It can be assessed on an ongoing basis through Onlineand offline assignments Quizzes Collaborative activities which may make use of some of theinteractive communication tools.The Software used in this representation is Moodlesoftware. Moodle is an Open Source web software package in LMS (Learning Management System) for producing internet-based educational and training courses within the web environment.The prepared System is called ELCSD(E-Learning for Computer Science Department).This ELCSD will help users and students improve their grades, better understand concepts from class, and prepare for tests. Most video lessons are 10 minutes or less, so they get the needed information in a fast and fun format.

The Quantum Dot Infrared Photo Detectors(QDIPs)become the leading technology in semiconductor detectors. This attraction comes from the properties of these devices that overpowers over the currently available detectorslike Quantum Well Infrared Photo Detectors (QWIPs). In this paper, different Z-length dimensions are used to investigate the behavior of energy levels inside the quantum dots.The Z-length is also applied to investigate the shift of the operating wavelength and adjust the quantum dot performanceby multiband Schroedinger-Poisson simulation. The generated electrons in the detection process areone of the most important properties of these dots. A software program is used to simulate the wave function, energy state, and absorption for different Z-dimensions.Results showed that the bandgap decreases and the absorption response shifts with increasing Z-dimension

Voice commands recognition is a way of understanding human speech and converting it to a communication input of computer. Based on the data used to feed the voice recognition system, systems could be classified asdependent or independent systems. In this paper, a dependent voice commands selective system is presented. The system uses the spectral subtraction algorithm for noise cancellation. A newalgorithm is named Select Matching Command Algorithm SMCA is used for matching voice command identification. Six different users (3 male and 3 female) are used to test the system. Each user tests the system two times,one by using twenty four voice commands samples previously selected and other time by using another twenty four voice commands out of the twenty four preselected samples. The proposed system is able to correctly identify the matching voice commands 90.97% of the time when testing the system with the predefined voice commands. Testing the system with voice commands out of the predefined commands shows92.36% of no matching identification.According to the results noted from the six users, overall percent of selective accuracy of thesuggestedsystem is 91.67%

Electrochemical machining (ECM) is a one of non-traditional machining process belonging to electrochemical type. ECM is one of the commonly used advanced machining processes particularly employed for manufacturing complicatedor complex geometry on difficult-to-machine materials. In today’s manufacturing era, electrochemical-machining process provides good surface finish due to its controlled atomic dissolution of work material involving chemical reactions during machining. To enhance the machining performance, precise selection of machining parameters is still a demanding job in ECM process as it is very complex process involving so many unpredictable chemical reactions while machining. In this work,material removal rate (MRR) has been investigated. Aluminium alloy was used as work material and sodium chloride (NaCl) solution was selected as electrolyte. The effect of three parameters namely (voltage, flow rate of electrolyte and electrolyte concentration) on the material removal rate (MRR) has been considered. Thirty-five experiments were carried out. Three various values for each parameter were selectedto carry out this studyfor voltage (10, 15, 20) V, for flow rate (8, 10, 12) l/min, and for concentration (50,75, 100) g/l. The results indicated that the higher values of MRR were (0.1598,0.1216, and 0.1485) g/min when value of each parameter voltage, flow rate and concentration was20 V, 12 l/min, and 100 g/l respectively.In addition, the MRR generally increased with increase of the voltage, flow rate, and concentration of electrolyte as the trend might be different in each condition. However, the voltage was theprominent factor that affectsthe MRR significantly.

Sulfate attack is a serious factor play important role in the degradation of structural capacity of reinforced concrete structures members especially those members exposure with ground water or sea water. This paper study the effect of external sulfate attack on mechanical properties of hybrid fiber reactive powder concrete (HFRPC) containing (polypropylene fiber and steel fiber) and normal strength concrete (NSC) after specimens have been casted, directly and continuously cured, and full immersed in saline solution containing magnesium sulfate, the concentration of the sulfate ion used in this study was equal to upper limit defined in ACI318M building code (10000 ppm), other specimens have been direct and continuously cured and fully immersed in tap water,prepare 108 cylinder, 36 cube and 36 prism for this purpose. The mechanical properties such as compressive strength, splitting tensile strength (measured splitting resistance and tensile strength), modulus of rupture (measured tensile strength) and modulus of elasticity (measured flexural strength) tests were investigated for HFRPC and NSC at different exposure periods (28, 90 and 180) days. Test results showed continuous development with time in mechanical properties for HFRPC when cured in sulfate water but test results for NSC showed significant deterioration when cured in sulfate water. An analytical equations have been derived by curve fitting to derive the relationships between the mechanical properties and compressive strength for HFRPC and NSC and its validation with ACI predicted. The ACI expression for the mechanical properties may result in underestimation of HFRPC and good accuracy of NSC under tap water and sulfate water curing condition

Contamination of the soil residues of various kinds, starting from sewage to industrial wastewater from the many problems that affect soil properties and their uses in general and on the engineering properties, in particular the study of the effect of these contaminants and methods of treatment effects on the soil of the priorities of researchers in this area . This thesis includes the Study of the effect of industrial waste (industrial water) on the engineering properties of the soil clay as well as the study of the effect of wetting and drying cycles on the engineering properties of the soil clay treated by industrial water, where the soil has been brought from Lylanin the province of Kirkuk. Tests have shown that the properties of the soil are medium swelling and the soil classification has been according to the Unified Classification (CL). Soil has been treated by two types of industrial water that have been brought in from the factories of Kirkuk . For the purpose of studying the effect of wetting and drying cycles engineering properties of the treated soil, samples of treated soil by industrial water have been exposed to (12) cycle of wetting and drying cycles after the compaction of soil private templates . The results showed that moisturizing and drying cycles lead to a reduction of the value of liquidity limit by (14%) soil type (A) and (14.3%) of the soil type (B),and reduction plastic limit andplasticity index. It also increases maximum dry density and the reduction of the optimum moisture content and also increase in both the effective cohesion (C'), the effective angle of internal friction (Ф') of the soil and the unconfined compression of soil.The effect of wetting and drying cycles on the consolidation characteristics have led to a decline of the coefficient of consolidation (Cv), compression index (Cc) and swelling index (Cs). As for the swelling properties, the wetting and drying cycles lead to reduction of the swelling percentage by (29%) soil type (A) and (28.3%) of the soil type (B) and swelling pressure by (37.4%) soil type (A) and (36.4%) of the soil type (B) . Chemical tests also showed that the proportion of organic matter and the proportion of total soluble salts do not change and there is a slight reduction of the proportion of sulfates in the soil and an increase in the pH with the exposure of soil to wetting and drying cycles