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Articles 5251 - 5280 of 5154623
Full-Text Articles in Entire DC Network
The Effects Of Cyanobactrum Chroococcus Minor And Oscillatoria Amonea On Seed Germination Of Plant Vigna Radiate, Ghaidaa Alrubaie
The Effects Of Cyanobactrum Chroococcus Minor And Oscillatoria Amonea On Seed Germination Of Plant Vigna Radiate, Ghaidaa Alrubaie
Engineering and Technology Journal
Cyanobacteria are prokaryotic photosynthesis algae able to produce toxins and that cause problems in water quality, agriculture and aquatic organisms As well as concerns about the public health for humans. Among the cyanobacterial toxins, microcystins (MC) are the most common. In this study, Identification and Isolation of blue green algae Chroococcus minor and Oscillatoria amonea Belonging to the cyanobacteria division, BG-11 media were used to cultivation. In suitable laboratory conditions (25 ±2C°, 260μE/m2/sec) for 16:8 hrs. Light: dark. The culture was harvested after 30 days and determine the effects of the extracellular of both algae on seed germination for Vigna …
Determination Of Radon Concentrations In Soil Around Al-Tuwaitha Site Using Cr-39 Detector, Khalid Mahdi, Auday Subhi, Najlaa Sharif, Ghuzlan Ahmed Ahmed
Determination Of Radon Concentrations In Soil Around Al-Tuwaitha Site Using Cr-39 Detector, Khalid Mahdi, Auday Subhi, Najlaa Sharif, Ghuzlan Ahmed Ahmed
Engineering and Technology Journal
In this work radon concentration in 37 soil samples collected from 17 regions surround the (Al Tuwaitha) were measured by using solid-state nuclear track detector (SSNTD.s) CR-39 with natural exposure of one month, and by comparison with standard samples. The radon concentration in the soil samples was about (9.583 ± 0.36928.029 ± 0.631) Bq/m3 in locations one (Rotate Salman) and eight (An area agricultural near high-voltage towers) respectively, with rate of (20.939 ± 0.541) Bq/m3. The specific activity of radium (Ra) dissolved during generate radon were ranging between (9.857 – 3.37) Bq.kg-1, with rate of (7.393) Bq.kg-1, surface emission of …
Effect Of Temperature And Concentration On The Optical Properties Of Pvc Solutions, Esam Tawfiq, Shams. Abdul Kareem
Effect Of Temperature And Concentration On The Optical Properties Of Pvc Solutions, Esam Tawfiq, Shams. Abdul Kareem
Engineering and Technology Journal
In this paper, effects of temperature and concentration on theabsorption spectra for Polyvinyl chloride solutions are studied at wavelengthsfrom 200 to 400 nm and with the range of temperature 20, 30, 40, 50, and 60degrees (Co). Electronic absorption spectra were examined over thewavelength range 200-400 nm by different concentrations (1x10-3, 8x10-4,6.5x10-4, 5x10-4 and 3x10-4)[M]. The UV spectra shifted slightly towardslarge wavelength with increasing the temperature. The values of the energygap of polyvinyl chloride are decreasing as concentration and temperatureincreased. The data shows that the refractive index of the polymer decreaseswith increasing the wavelength and temperature. The relationship between theabsorption coefficient …
A Proposed Alzheimer's Disease Diagnosing System Based On Clustering And Segmentation Techniques, Sarah Mohammed
A Proposed Alzheimer's Disease Diagnosing System Based On Clustering And Segmentation Techniques, Sarah Mohammed
Engineering and Technology Journal
Alzheimer's-disease (AD) is one of the prevalent diseases that afflict theelderly. The medical field defines Alzheimer is the destruction of brain cells sothat the person loses knowledge and perception, afflict both sexes and is calleddementia. The medical field often suffers from accurate diagnosis and detection ofthe disease in the early stages. This paper presents a diagnostic approach ofAlzheimer based on K-mean clustering algorithm with Markov random fieldsegmentation on Magnetic Reasoning Images (MRI) to build software able to helpthe medical staff identifying and diagnosis the disease. The experimental resultshows that 91% accuracy is achieved, which demonstrate the system's reliabilityin the medical …
Comparison Between The Biological Activity Of Agaricus Bisporus Fruiting Bodies And Albizzia Lebbeck Leaves Extract Against Different Pathogenic Microoganisms, Israa Al-Temimay
Comparison Between The Biological Activity Of Agaricus Bisporus Fruiting Bodies And Albizzia Lebbeck Leaves Extract Against Different Pathogenic Microoganisms, Israa Al-Temimay
Engineering and Technology Journal
In this study, antibacterial activity of ethyl acetate extracts of Agaricusbisporus fruiting bodies and ethyl acetate extracts of Albizzia lebbeck leaves wereexamined in-vitro with (2) two pathogenic bacteria (Escherichia coli and Proteus)and yeast (Candida albicanus), following agar well diffusion method usingdifferent concentrations (25, 50, and 100μl). The extracts of Agaricus bisporus andAlbizzia lebbeck were showed potent antimicrobial activity against tested bacteriaand yeast. Agaricus bisporus fruiting bodies extract was showed the highestinhibitory effect versus growth of bacteria and yeast were tested in this study. TheE. coli and Proteus were found to show large sensitivity to the extracts of Agaricusbisporus with 12 …
Evaluation Of Purified Urease Activity From Proteus Mirabilis Using Iron Oxide Nanoparticles And Measurement Of Urea Concentration In Blood, Hadeel Dawud, Entesar Ali
Evaluation Of Purified Urease Activity From Proteus Mirabilis Using Iron Oxide Nanoparticles And Measurement Of Urea Concentration In Blood, Hadeel Dawud, Entesar Ali
Engineering and Technology Journal
The activity of urease purified from Proteus mirabilis bacteria wasestimated using gamma iron oxide nanoparticles (γ-Fe2O3) which were obtained asstandard in size (20- 40)nm, purity 99%. The enzyme activity was estimated byincubating the pure enzyme with various concentrations of nanoparticles rangedbetween (1- 6) μg/ml. The results indicates a decrease in enzymatic activity withincreasing of nanoparticles concentration. After that, the concentration of bloodurea was measured using urease obtained from a standard kit, urease purified fromProteus mirabilis and the urease- gamma iron nanoparticles solution. Thecomparison was then made among the results of urea concentrations by statisticalanalysis using T-test. The results showed that …
Optical Characterizations Of Rf-Magnetron Sputtered Nanocrystalline Tio2 Thin Film, Azhar Sadkhan
Optical Characterizations Of Rf-Magnetron Sputtered Nanocrystalline Tio2 Thin Film, Azhar Sadkhan
Engineering and Technology Journal
TiO2 nanocrystalline thin films are widely used as antireflection coatingin solar cell, in this paper, RF magnetron sputtering technique is used to prepareTiO2 thin film on glass substrates, TiO2 thin films deposited under differentpowers (75,100,125 and 150) Watt for (1.5) hour resulted in different layerthickness (62.5,88,118 and 132.6) nm respectively. The optical propertiesexamined by UV-VIS spectroscopy. TiO2 thin films exhibit a high transparency inthe region from about 350 nm above, we suggest that these results indicate themost suitable growing conditions for obtaining high quality sputtered TiO2 thinfilms with higher transparence performance for solar cell application. the opticalabsorbance coefficient for all …
Levels Of Lead And Chromium Ions In Different Brands Of Lipstick Sold At Local Markets In Iraq, Shaymaa Khazaal, Khalida Al-Azawi, Hamsa Eessa, Abdulnasser Al-Gebori Al-Gebori, Hasan Obayes, Abeer Khasraghi
Levels Of Lead And Chromium Ions In Different Brands Of Lipstick Sold At Local Markets In Iraq, Shaymaa Khazaal, Khalida Al-Azawi, Hamsa Eessa, Abdulnasser Al-Gebori Al-Gebori, Hasan Obayes, Abeer Khasraghi
Engineering and Technology Journal
Lead and Chromium ion samples of five commercial samplesof each of twenty brands of lipstick sold at locally markets in Iraq weredetermined by atomic absorption spectrophotometer. Samples ofdigested Lipstick were used, acid digestion method using acids HCl:HNO3 in ratio 1:3 were used before analysis. Average for analyzedsamples were Pb, 0.10-4.85 ppm; Cr, 0.18-5.2 ppm. Samples No.9 andNo.4 showed the least concentrations of Pb and Cr respectively. Thesevalues are not expected to be toxic to humans. However, exposure overlong periods might cause accumulation of the elements in the body andeven at low concentration; some metals could initiate allergic reactions.
Hydraulic Parameters Of Groundwater Aquifers In Khan-Al-Baghdadi Area, Hussein Al-Sudani
Hydraulic Parameters Of Groundwater Aquifers In Khan-Al-Baghdadi Area, Hussein Al-Sudani
Engineering and Technology Journal
The mainly objective of groundwater studies is assessment the physicalcharacterizations of water-bearing layers. Conducting and analyzing aquifertests is one of the most efficient ways to assessment these characterizations. Theaim of this research is to carry out hydrogeological investigation in Khan Al-Baghdadi area within Anbar Governorate in the west of Iraq to evaluatehydraulic properties of the most important groundwater aquifers in order toachieve optimum use of groundwater in term of sustainable water management byusing Cooper-Jacob and Theis Recovery Test methods to calculate transmissivityand storage coefficient after field investigation of aquifers extended in the areawhere geographical position, elevations, static water levels, depths, …
The Growth Characteristics Of Rf-Magnetron Sputtered Nanocrystalline Tio2 Thin Films, Azhar Sadkhan, Suaad Mohammed, Mohammed Khalaf
The Growth Characteristics Of Rf-Magnetron Sputtered Nanocrystalline Tio2 Thin Films, Azhar Sadkhan, Suaad Mohammed, Mohammed Khalaf
Engineering and Technology Journal
In this paper, RF Magnetron sputtered TiO2 thin films deposited onglass slices at various powers (75,100,125 and 150) Watt for (1.5) hour anddifferent thickness (62.5-88-118 and 132.6) nm, the TiO2 thin films annealed with400°C for 2 hour and the morphology and structure of these films are describedby X-ray diffraction XRD and atomic force microscopy AFM to show the phasestructure. X-ray diffraction investigation uncovered that the crystalline size of theTiO2 thin films displays an expanding pattern with increasing the sputteringpower. The preferred orientation of (101) was watched for the films depositedwith sputtering power of (75,100,125 and 150) Watt.
Easy And New Chemical Synthesis Of Stable Nano Sliver Using Propylene Glycol And Glycerin As Reducing Agents, Abdulah Mohammed, Sarab Mahmood
Easy And New Chemical Synthesis Of Stable Nano Sliver Using Propylene Glycol And Glycerin As Reducing Agents, Abdulah Mohammed, Sarab Mahmood
Engineering and Technology Journal
In this present work we have synthesized stable silvernanoparticles (Ag-NPs) by chemical reduction with aqueous solutions ofsilver nitrate (i) propylene glycol (ii) glycerin as reducing agents and guargum as a stabilizer. The reaction were done at room temperature and atpH=8. Systematic characterizations of the Ag-NPs were done using UV-Vis,zeta potential analysis, X-Ray diffraction (XRD), AFM and SEM whichreveal stable Ag-NPs. These measurements indicate that the particles aremostly spherical in shape. The UV-Vis spectra of the result solution of Ag-NPs show an absorption peak at 412 nm and 424 nm for using propyleneglycol and for using glycerin respectively. These color occurring …
Studying The Effect Of Annealing Temperature On Some Physical Properties Of In2o3 Thin Films, Duaa Mohammed, Muslim Jawad
Studying The Effect Of Annealing Temperature On Some Physical Properties Of In2o3 Thin Films, Duaa Mohammed, Muslim Jawad
Engineering and Technology Journal
In this study, In2O3 thin films were deposited on quartz substrates bypulsed laser deposition technique at room temperature and followed bythermally annealing at 300℃, 400℃ and 500℃ for 1 hour. The optical bandgap was found to increase with the annealing temperature from 3.5 to 3.85 eVand the transmittance was observed above 90%. XRD results show that the filmsare polycrystalline in nature and crystallizes with preferred orientation (222).SEM images show that the films are
The Approximate Solution Of The Fornberg-Whitham Equation By A Semi-Analytical Iterative Technique, Sinan Abd Almjeed
The Approximate Solution Of The Fornberg-Whitham Equation By A Semi-Analytical Iterative Technique, Sinan Abd Almjeed
Engineering and Technology Journal
In this work, two semi-analytical methods are introduced inorder to handle the solution of the Fornberg-Whitham equation. Thefirst one method has been proposed by Temimi and Ansari, namely theTAM. The second method is the Banach contraction method which isbriefly called the BCM. Both methods do not require using anyadditional assumptions. Our calculations are distinguished by anefficiency and rapidity of obtaining the results, in comparison with theprevious studies for solving the same problem.
Intrusion Detection System Based On Data Mining Techniques To Reduce False Alarm Rate, Sarah Shareef, Soukeana Hashim
Intrusion Detection System Based On Data Mining Techniques To Reduce False Alarm Rate, Sarah Shareef, Soukeana Hashim
Engineering and Technology Journal
Nowadays, Security of network traffic is becoming a major issue ofcomputer network system according to the huge development of internet.Intrusion detection system has been used for discovering intrusion and tomaintain the security information from attacks. In this paper, produced twolevels of mining algorithms to construct Network Intrusion Detection System(NIDS) and to reduce false alarm rate, in the first level Naïve Bayes algorithmis used to classify abnormal activity into the main four attack types fromnormal behavior. In the second level ID3 decision tree algorithm is used toclassify four attack types into (22) children of attacks from normal behavior.To evaluate the performance …
The Influence Of Immersion In Different Chemical Solutions On The Mechanical And Physical Properties Of (Epoxy/Styrene-Butadiene Rubber) Blend Reinforced With Nano Copper Oxide, Rana Salih
Engineering and Technology Journal
The aim of this work was to evaluate some mechanical and physicalproperties of a composite material which consists of (epoxy/styrene-butadienerubber) blend as a matrix, reinforced with copper oxide (CuO) with a weightfraction 3%, and the composite material was manufactured by hand lay-up.The optimum mixing ratio was (75:25) % of epoxy and (SBR) was chosen toaccomplish the work due to its highest impact strength (2.1KJ/m2). The teststhat were performed on the material were: tensile test, impact test, thermalconductivity test, and the absorption test, in addition to the microscopicimaging using scanning electron microscope (SEM), to determine the surfacemorphology of the specimens. Sodium …
Influence Of Spirals On The Behavior Of Short Rc Columns Strengthened By External Cfrp, Kaiss Sarsam, Raid Khalel, Mohammed Hadi
Influence Of Spirals On The Behavior Of Short Rc Columns Strengthened By External Cfrp, Kaiss Sarsam, Raid Khalel, Mohammed Hadi
Engineering and Technology Journal
An experimental study was carried out to investigate the behavior of normal strength reinforced concrete (RC) circular short columns strengthened by carbon fiber reinforced polymer (CFRP) sheets. Three series comprising total of (15) specimens were loaded to failure under axial concentric compression load. Strengthening was varied by changing CFRP strips number, spacing and wrapping methods. The finding of this research can be summarized as follows; for the columns without CFRP, the influence of the spiral pitch was significant: compared with 100 mm spiral pitch, dropping the spacing to 65 mm and 30 mm increased the load carrying capacity by 25% …
Corrosion Inhibition Of Mild Steel In Hydrochloric Acid Solution By An Isatin-Aniline Compound, Khalida Al-Azawi
Corrosion Inhibition Of Mild Steel In Hydrochloric Acid Solution By An Isatin-Aniline Compound, Khalida Al-Azawi
Engineering and Technology Journal
Recently the researchers go to the eco-friendly corrosion inhibitors.In the present investigation, isatin which found in many plants, Isatis tinctoria,Calanthe discolor and Couroupita guianensis has been used as corrosioninhibitor. An isatin-aniline compound, namely ethyl 4-amino-N-(3-isatinyl)benzoate (AIB), was successfully synthesized in high yield and its inhibitionimpact on corrosion of MS (mild steel) in hydrochloric acid as corrosivesolution was examined via weight loss and Scanning electron microscopetechniques. The results acquired appeared that AIB has employ perfect as acorrosion inhibitor at low concentrations towards mild steel in HCl bath. Theimpact of temperature on the corrosion behavior of MS in corrosive bath withpresence of …
Sensor Network Based Animals Feeding And Milk Production Management System, Zena Faris, Muayad Croock
Sensor Network Based Animals Feeding And Milk Production Management System, Zena Faris, Muayad Croock
Engineering and Technology Journal
In general, the animals’ feeding requires a lot of time and efforts spent by the cattlemen. Part of the feeding amount is consumed by the animal to save its life and the other part is considered for instrumental milk production. The type of food in addition to the number of feeding frequents are important factors in changing the amount of produced milk as well as the weight of an animal. In this paper, we propose a control system that manage the forage process and the amount of produced milk by determining the quantity and number of feeding animals using sensor …
Entropy Generation Minimization Theoretical Analysis For External Flow Around Horizontal Cylinder At Low Reynold Number, Louay Mahdi
Engineering and Technology Journal
The minimization of entropy generation is a helpful method to design optimum thermal system, and find an expression for entropy generation at several ranges of Reynolds number for heat transfer and friction flow irreversibility is a good way to achieve this goal. This study deal with several ranges of Reynolds number that cover 0.1< Re< 40000 divided into four groups. A relation between optimum Reynolds number, entropy generation number, irreversibility distribution ratio, and Began number was obtained. In addition, a relation between the optimum Reynolds number and the duty parameter was obtained for all Reynolds number ranges.
New Strategies For Associative Memories, Azad Kareem, Saja Talib
New Strategies For Associative Memories, Azad Kareem, Saja Talib
Engineering and Technology Journal
Associative memory is a neural network used to save collection of input and output data at its layers. Each output data is produced coincide with a given input. It can be useful as an artificial memory in many applications like (military, medical, data security systems, error detection and correction systems …etc.). There are two matters which limit the uses of associative memory; the limited storage capacity, and the error occurred in the reading of output data. A modified strategy is suggested to overcome these limitations by introducing a new algorithm to the design of the associative memory. This method provides …
Stress Intensity Factor In Hollow Square Sections Using Extended Finite Element Method, Qusai Abdulwaha
Stress Intensity Factor In Hollow Square Sections Using Extended Finite Element Method, Qusai Abdulwaha
Engineering and Technology Journal
Hollow sections are extensively used in structural applications due to its good mechanical properties relative to weight. The presence of cracks in structural member may lead to catastrophic failure under different loading conditions. The presence of central crack in one side under tensile load is studied for different crack sizes (a/w) ranging from 0.1 to 0.8. The section is then investigated under bending moment for same crack size and geometry. The values of stress intensity factor (KI) were evaluated using Extended Finite Element Method (XFEM) and found very close between tensile and bending for same crack sizes but there was …
Experimental Study For The Effects Of Crystalline Agents On Properties Of Glass-Ceramic Coating, Ibtihal Mhmood, Ahmed Zainulabdeen, Jabbar Mohmmed
Experimental Study For The Effects Of Crystalline Agents On Properties Of Glass-Ceramic Coating, Ibtihal Mhmood, Ahmed Zainulabdeen, Jabbar Mohmmed
Engineering and Technology Journal
In this work, four series of glass-ceramic coatings were developed and applied by using the dipping technique to cast iron sheets. The influence of different types of crystallization agents (Li2O, TiO2, ZrSiO4, and CaO.Al2O3.2SiO2) was investigated in relation to the mechanical features of the coatings. The resultant coating is characterized using X-ray diffraction analysis. The properties of micro-hardness and adhesion strength are evaluated using suitable standard tests. The X-ray analysis of resultant coatings showed the existence of some of crystalline phases formed depending on the type of the crystallization agent. The results also indicated that the coating properties were strongly …
Frequency Reconfigurable Monopole Antenna Using Switchable Slotted Triangular Radiators, Fayyadh Ahmed, Bayez Al-Sulaifanie
Frequency Reconfigurable Monopole Antenna Using Switchable Slotted Triangular Radiators, Fayyadh Ahmed, Bayez Al-Sulaifanie
Engineering and Technology Journal
A new configuration of multi-state switchable wideband /multi-narrowband is demonstrated. The proposed antenna is based on a printed rectangular monopole antenna (PRMA) that covers wideband 3.3 GHz WiMAX frequency range. To generate a multi-state switchable antenna, center part of PRMA has been removed without distorting the PRMA behavior. Three PIN diode switches are used to control different operating modes. Eight-operating modes, 2n modes (n is number of switches) are achieved by setting the switches ON or OFF. Initial results were obtained by using short and open circuits instead of implanting PIN diode. The merit of the antenna design is that …
Design And Analysis Of American Sign Language Classifier Based On N-Tuple Technique, Mahmuod Al-Muifraje, Thamir Saeed, Mosab Hassan
Design And Analysis Of American Sign Language Classifier Based On N-Tuple Technique, Mahmuod Al-Muifraje, Thamir Saeed, Mosab Hassan
Engineering and Technology Journal
This work consists of three stages: the first stage is the collection of data (images) for 26 letters alphabet, which is 1040 images, 40 for each class (letter). The second stage is the Preprocessing (segmentation, filtering, crop, convert to a binary image and feature extraction) and the last stage is the classy one. Two filters have been used median and wiener2 to treatment two types of noise; the salt and pepper and Gaussian noise respectively. The classification has been satisfied by using an n-tuple classifier algorithm is 93.8462%, while it is 93.2692% with salt and pepper noise. In this context, …
Experimental Behavior Of Hybrid Steel And Polypropylene Fiber Reinforced Concrete Deep Beam Containing Openings, Nabeel Al-Bayati, Noor Hadi
Experimental Behavior Of Hybrid Steel And Polypropylene Fiber Reinforced Concrete Deep Beam Containing Openings, Nabeel Al-Bayati, Noor Hadi
Engineering and Technology Journal
Twelve simple span reinforced concrete deep beams were tested under symmetrically two points top load to examine the effect of steel fiber and polypropylene fiber and influence of the transverse circular openings on their behavior. The variables investigated involve beams with and without openings, the volume fraction of fibers, shear span to effective ratio a/d, and inclined reinforcement around the openings. All the beams had the same overall dimensions, flexural reinforcement and opening size. Many mixes have been used by combination between steel fibers and polypropylene fibers with different percentages of (1%SF-0%PPF), (0.75%SF-0.25%PPF), (0.5%SF-0.5%PPF), (0.25%SF-0.75%PPF), (0%SF-1%PPF) in addition to mix …
Experimental Behavior Of Self Compacting Concrete Corbels Strengthened With External Cfrp, Sarmad Abdulqader, Basil Al-Shathr, Ali Hasan
Experimental Behavior Of Self Compacting Concrete Corbels Strengthened With External Cfrp, Sarmad Abdulqader, Basil Al-Shathr, Ali Hasan
Engineering and Technology Journal
This research aims to study the influence of using Carbon Fiber Reinforced Polymer (CFRP) strips as an external strengthened and repairing material on the behavior of self-compacting concrete (SCC) Corbels. The experimental work involved testing twenty self-compacting concrete corbels specimens. The experimental work is divided into two parts; the first part consists of three groups to investigate the most effective direction, position, bonding type and amount of CFRP strips on the behavior of corbels and utilized it in practice, also to strengthen new variables that are investigated in the second part. Two groups in part one are strengthened with different …
Shear Strength Of Concrete Deep Beam Subjected To Uniformly Distributed Load, Eyal Sayhood, Ali Resheq, Ayad Habeeb
Shear Strength Of Concrete Deep Beam Subjected To Uniformly Distributed Load, Eyal Sayhood, Ali Resheq, Ayad Habeeb
Engineering and Technology Journal
In this paper, result of tests on 20 simply supported concrete deep beams are presented. All tested beams have dimensions of (150 x 400 x 1100) mm and tested under (1, 2, 4 and 8) point loads. The considered parameters are shear span to effective depth ratio (a/d), concrete compressive strength (fʹc) and longitudinal reinforcement ratio (ρw).The influence of these parameters on cracking and ultimate load, load versus deflection response and concrete strain are investigated.The results showed that the decrease in the (a/d) ratio from 1.373 to 0.412 leads to a decrease in cracking and ultimate shear strengths by average …
Robust Visual Lips Feature Extraction Method For Improved Visual Speech Recognition System, Mahmuod Mahmmed, Thamir Saeed, Wissam Ali
Robust Visual Lips Feature Extraction Method For Improved Visual Speech Recognition System, Mahmuod Mahmmed, Thamir Saeed, Wissam Ali
Engineering and Technology Journal
Recently, automatic lips reading ALR acquired a significant interest among many researchers due to its adoption in many applications. One such application is in speech recognition system in noisy environment, where visual cue that contain some integral information added to the audio signal, as well as the way that person merges audio-visual stimulus to identify utterance. The unsolved part of this problem is the utterance classification using only the visual cues without the availability of acoustic signal of the talker's speech. By taking into considerations a set of frames from recorded video for a person uttering a word; a robust …
Relationships Between Actual Compressive Strength, Modulus Of Elasticity And Non-Destructive Tests Of High Strength Concrete, Jasim Abd
Engineering and Technology Journal
The present research investigate with Nondestructive testing (NDT) of high strength concrete (HSC). An experiential work was carried out including both destructive and nondestructive test methods utilized to various concrete mixes with compressive strength ranged from 44 to 84.4MPa.Correlation curves were derived as pulse velocity and modulus of elasticity vs. compressive strength for high strength concrete. Two empirical relations were proposed for foretelling the modulus of elasticity Ec = 0.4141f`c + 8.6077, and compressive strengths fcu = 320.85ln (V) – 467.73 with a good coefficient of determination R2 for these equations 0.94and 0.90 respectively. Obtained from cubic and cylinders using …
Workability Of Hybrid Fiber Reinforced Self-Compacting Concrete, Tareq Al-Attar, Samer Daoud, Anmar Dhaher
Workability Of Hybrid Fiber Reinforced Self-Compacting Concrete, Tareq Al-Attar, Samer Daoud, Anmar Dhaher
Engineering and Technology Journal
The aim of this work is to evaluate the effect of adding different types of fibers on the fresh properties of the self-compacting concrete, SCC. The used types of fibers were steel (with volume ratios of 0.75, 1.0 and 1.25 %) and polypropylene fibers (0.10 and 0.15 %) and a hybrid system of these fibers (0.65 % steel and 0.10 % polypropylene). The conducted tests in the fresh state were slump flow, T500, V-funnel and L-box. It was noticed that increasing the volume fraction of fibers would lead to decrease in the workability of SCC. According to EFNARC requirements for …