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Articles 6361 - 6390 of 107102
Full-Text Articles in Entire DC Network
Mapping Lclu Using Python Scripting, Oday Jasim, Khalid Hasoon, Noor Sadiqe
Mapping Lclu Using Python Scripting, Oday Jasim, Khalid Hasoon, Noor Sadiqe
Engineering and Technology Journal
Land cover land use changes constantly with the time at local, regional, and global scales, therefore, remote sensing provides wide, and broad information for quantifying the location, extent, and variability of change; the reason and processes of change; and the responses to and consequences of change. And considering to the importance of mapping of (LCLU). For that reason this study will focus on the problems arising from the traditional classification (LCLU) that based on spatial resolution only which leads to prediction a thematic map with noisy classes, and using a new method that depend on spectral and spatial resolution to …
E-Learning Applications In Engineering And The Project-Based Learning Vs Problem-Based Learning Styles: A Critical & Comparative Study, Hatim Abood
Engineering and Technology Journal
The paper aims to critically review the learning styles and teaching methods of engineering curricula and to compare it with the requirements of engineering profession. Present engineers need to response effectively to the increasingly complex systems. The engineer has to deal with vector and scaler quantities, complex numbers, imaginary parts, electromagnetic fields, and complex constructions are designed and implemented in 3-Dimensions environment. This should be reflected in engineering education styles, where lecturers try to convey many aspects of complex systems. The purpose of engineering education is that to graduate engineers who can design and solve technical problems, and that design …
The Extraction Of Alumina From Kaolin, Alaa Ali, Mohammed Al-Taie, Ihab Ayoob
The Extraction Of Alumina From Kaolin, Alaa Ali, Mohammed Al-Taie, Ihab Ayoob
Engineering and Technology Journal
Alumina has wide industrial and technological applications that can be extracted from different locations, different methods and materials. Kaolin from Iraq Alduikhla astrologer has used as a raw material source for alumina production. The alumina concentration in the Iraqi kaolin is more than 34% which considered as a good replacement for bauxite rack. Crushing andground is the first process to reduce the kaolin particle size to the micron level which increases the surface area of kaolin.The kaolin is heat treated at different temperatures (600, 650, 700 and 750) ̊C for 2 hours to remove some of ithe mpurity like organic …
Experimental Study Of 3d Printing Density Effect On The Mechanical Properties Of The Carbon-Fiber And Polylactic Acid Specimens, Wafa Soud, Ihsan Baqer, Mohammed Ahmed
Experimental Study Of 3d Printing Density Effect On The Mechanical Properties Of The Carbon-Fiber And Polylactic Acid Specimens, Wafa Soud, Ihsan Baqer, Mohammed Ahmed
Engineering and Technology Journal
Two 3D printed materials (Polylactic Acid and Carbon fiber) with variable printing density have been investigated due to their practical uses in the engineering utilization. The effect of printing density composites was studied by the tensile test. The used materials stress-strain curves were analyzed to find modulus of elasticity and ultimate tensile strength of the mentioned materials. The results manifested that the carbon fiber has the highest strength-weight ratio. On the other hand, the carbon fiber showed more ductility than the Polylactic Acid. The results of this paper will be aiding the researchers or engineering students to decide which material …
Development The Physical Properties Of Polymeric Blend (Sr/ Pmma) By Adding Various Types Of Nanoparticles, Used For Maxillofacial Prosthesis Applications, Sihama Salih, Jawad Oleiwi, Hajir Ali
Development The Physical Properties Of Polymeric Blend (Sr/ Pmma) By Adding Various Types Of Nanoparticles, Used For Maxillofacial Prosthesis Applications, Sihama Salih, Jawad Oleiwi, Hajir Ali
Engineering and Technology Journal
As maxillofacial defects increased due to cancer; it became necessary to select high-quality prosthetic materials in this field. Silicone rubber is widely used in damaged maxillofacial affected areas replacement surgery as bio material. The aim of this research, prepared a nano composites materials, from polymer blend (silicone rubber: 5% PMMA) reinforced by different types of nano-powders; pomegranate Peels Powder (PPP), Seeds powder of dates Ajwa (SPDA) and TiO2 nano-powders with loading level (0.0, 0.1, 0.2, 0.3 and 0.4%). Some physical properties such as density, water absorption, and Thermo-Physical test, FTIR analysis, as well as, FTIR, antibacterial tests were done on …
Study The Microstructure And Mechanical Properties Of High Chromium White Cast Iron (Hcwci) Under Different Martempering Quenching Mediums, Ali Ataiwi, Zainab Betti
Study The Microstructure And Mechanical Properties Of High Chromium White Cast Iron (Hcwci) Under Different Martempering Quenching Mediums, Ali Ataiwi, Zainab Betti
Engineering and Technology Journal
The aim of this study is to find an alternative quenching medium for the ordinary nitrate mixture that is cheaper and more available in Iraqi markets. So to obtain the suitable medium , the effect of different quenching mediums used in martempering treatment on the microstructure and mechanical properties of high chromium white cast iron was studied . This type of cast iron is used in mining ,crushing and cement plants as mill liners so it is subjected to extreme conditions of wear and impact that eventually cause failure . In this study, two types of quenching mediums were used …
Assessment Of The Desalinationeffect On Shatal-Arab, Mohammed Al-Hashimi, Falah Alnedawy
Assessment Of The Desalinationeffect On Shatal-Arab, Mohammed Al-Hashimi, Falah Alnedawy
Engineering and Technology Journal
The resource of the dulcet water decreasing on our plant. Obstacles and problems that face water resources are the pollution and increasing of industrial wastes because of the human activities, lack of water resources in a place is considered dryness on well as unacceptable quality and quantity. The effect of outstretch and tide in estuaries of rivers increase the concentration of the salt in surface water. The city of Basra suffers from the lack of water discharge and high concentration of salt , wastewater, and the salt wedge ascending from downstream of Shat al – Arab river. The water decrease …
Environmental Impact Assessment For Modern Brick Factory In Baghdad, Iraq, Saadi Al-Nuzal, Salih Al-Bakri, Sarah Zankana
Environmental Impact Assessment For Modern Brick Factory In Baghdad, Iraq, Saadi Al-Nuzal, Salih Al-Bakri, Sarah Zankana
Engineering and Technology Journal
The environmental and social impacts of a bricks factory was evaluated and the information's have been collected from a community questionnaire, as well as the analysis quadrilateral (SOWT) strategic for default modern bricks factory. The results devolve toward the manufacture of bricks with a modern and environment friend technology showed the extent of the community's awareness about contaminants posed by traditional brick plants. The analysis of the strategic quadrilateral project gave positive results in terms of overcome strength elements and of weakness in the internal environment and opportunities to overcome threats in the external environment for the modern factory. The …
Rubber Pad Sheet Metal Forming Of Round Metal Blanks Into Multi Shape Axisymmetric Cups By Fea And Experimental Methods, Karem Younis, Adnan Mohammed, Jalil Shukur
Rubber Pad Sheet Metal Forming Of Round Metal Blanks Into Multi Shape Axisymmetric Cups By Fea And Experimental Methods, Karem Younis, Adnan Mohammed, Jalil Shukur
Engineering and Technology Journal
Rubber-pad forming process of round sheet blanks into axisymmetric cups is studied by numerical and experimental approaches. In the experiments, round metal sheets are formed into the axisymmetric cups by pressing them between a rubber pad and a former block with desirable shape. To investigate influences of different parameters on the forming load, three former blocks with different shapes, blank material of low carbon steel (ST12) with thickness 0.5 mm ,three polyurethane rubber with different hardness (50,60 and 70) shore A and rubber pad having three different thickness (40,60 and 80) mm . ANSYS Workbench utilized to perform the numerical …
Seasonal Variations Of Air Pollutants Concentrations Within Baghdad City, Layla Alwan, Sedik Al-Hiyaly, Ayat Mahdi
Seasonal Variations Of Air Pollutants Concentrations Within Baghdad City, Layla Alwan, Sedik Al-Hiyaly, Ayat Mahdi
Engineering and Technology Journal
Air pollution is increased significantly nowadays due to variousindustrial activities and car combustion emissions. In this work, data have beencollected from Al-Jadrya Monitoring Station (JMS). The effects of seasonalvariation on the pollutants concentration were examined. Furthermore,relations of nitrogen oxides concentrations (NOx) were assessed during the firsthours of the working days. Three randomly days from each of January,February, July and August have been taken to represent winter and summerseasons, respectively. It has been found that concentrations of all examinedpollutants have not exceeded the acceptable limits. However, nitrogen oxides(NOx) seem to be effected by seasonal variation where its concentration hasincreased in June …
Phytoremediation Of Heavy Metals(Cd, Cu, Fe, And Pb) By Using Aquatic Plants In Shatt Al-Arab River, Taha Al-Edani, Hayfaa Al-Tameemi, Zainab Jasim
Phytoremediation Of Heavy Metals(Cd, Cu, Fe, And Pb) By Using Aquatic Plants In Shatt Al-Arab River, Taha Al-Edani, Hayfaa Al-Tameemi, Zainab Jasim
Engineering and Technology Journal
The study conducted to evaluate the ability of some aquatic plants in absorption and accumulate some heavy metals (Cd, Cu, Fe, and Pb) in their tissues from contaminated water in two sites of Shatt Al-Arab River, Province of Basrah/Iraq. Water samples were collected from two sites one of them north of Basrah (Gurna) and the other from Sindbad island middle site of Shatt Al-Arab river. The chemical analysis had been performed to find out water quality. A laboratory experiment had been conducted by using three types of aquatic plants which were; Common Hornwort (Ceratophyllum demersum L., Common Reed (Phragmites australis …
Heavy Metals Accumulation In Two Types Of Tree Leaves From Baghdad Urban Areas, Maha Mahmood, Athmar Al-Mashhady, Ali Ali
Heavy Metals Accumulation In Two Types Of Tree Leaves From Baghdad Urban Areas, Maha Mahmood, Athmar Al-Mashhady, Ali Ali
Engineering and Technology Journal
It is well known that environmental pollution by many heavymetals is a serious problem to the natural ecosystem due to their toxiceffects. Most heavy metals such as Cu, Mn, Fe, and Zn are needed byvarious organisms but at certain concentrations is very necessary forboth plants and animals. However, it has been suggested that ever greenplant trees can assist in controlling such pollution via various methodswhere one method is the ability of these plant trees to absorb heavymetals from contaminated soils. The current work was designed to assessCd, Mn and Pb plant content in two tree species (Eucalyptus sp. andAlbizia sp.) …
Dna Fingerprints Of Two Tilapia Fish Species Of Euphrates River At Governorate Ofal-Muthanna Using Rapd Markers, Taha Al-Khafaji, Mustafa Ziyadi, Marwa Musad
Dna Fingerprints Of Two Tilapia Fish Species Of Euphrates River At Governorate Ofal-Muthanna Using Rapd Markers, Taha Al-Khafaji, Mustafa Ziyadi, Marwa Musad
Engineering and Technology Journal
During the last decade, tilapia species (Cichlidae: Teleostei) becamemembers of Iraqi fish fauna. They characterized with morphological similarity amonggenera and species. That makes species differentiation not easily. Molecular methodsfollowed to differentiate between redbelly tilapia Coptodon zillii (Gervais, 1848) andblue tilapia Oreochromis aureus (Steindachner, 1864) of the Euphrates River sectorat Al-Samawah city. RAPD-PCR method used to create the genetic fingerprints of twotilapia fish species. Seven decamer primers (OPA08, OPA10, OPA13, OPA17,OPA19, OPB08 and OPC02) used to amplify DNA fragments using PCR-RAPDtechnique. Forty-four bands scored after electrophoresis on 2% agarose gel alongwith molecular marker fragmented to each 100 base pair. The molecular …
Behavior Of Recycled Aggregate Fibrous Reinforced Beams Under Flexural And Shear Loading, Eyad Sayhood, Ali Resheq, Farah Raoof
Behavior Of Recycled Aggregate Fibrous Reinforced Beams Under Flexural And Shear Loading, Eyad Sayhood, Ali Resheq, Farah Raoof
Engineering and Technology Journal
The use of recycled concrete aggregates (RCA) to replace part or all of the natural coarse aggregates (NCA) in the production of concrete has been on the increase. Such use helps in the protection of the natural resources and in the reduction in the use o f landfills. The experimental work consists of casting and testing ten rectangular simply supported reinforced concrete beams of dimensions (1500*150*240) mm with concentric point load at mid span as well as tests for control specimens to determine the mechanical prope rties of the concert. Five beams of these ten beams were designed to fail …
Study The Performance Of Dissolved Air Flotation As Industrial Wastewater Treatment Method, Thamer Mohammed, Mohammed Albarazanje
Study The Performance Of Dissolved Air Flotation As Industrial Wastewater Treatment Method, Thamer Mohammed, Mohammed Albarazanje
Engineering and Technology Journal
This research aimed to study the removal efficiency of oilpollutant from industrial wastewater by dissolved-air flotation (DAF)with and without chemical coagulants. The sample test of wastewater isdischarged from Daura Refinery. The performance of dissolved airflotation for example saturation pressure and recycle ratio were studied.The industrial wastewater treated by DAF is carried out with two typesof chemical coagulants: Alum and Polyacrylamid. The treatment methodof wastewater by DAF with and without chemical coagulants and theireffect on the removal efficiency of oil, results were obtained at differentparameters such as saturation pressure (2,5-5.5atm) and recycle ratio(20-50). It has been found the oil removal efficiency …
Removal Of Nitrate From Contaminated Groundwater Using Solar Membrane Distillation, Alaa Al-Fatlawi, Mohsen Karrabi, Ghassan Abukhanafer, Ahmed Al Samlan Al Samlan
Removal Of Nitrate From Contaminated Groundwater Using Solar Membrane Distillation, Alaa Al-Fatlawi, Mohsen Karrabi, Ghassan Abukhanafer, Ahmed Al Samlan Al Samlan
Engineering and Technology Journal
Nitrate contamination is worldwide water pollution posing a majorhealth hazard to human and animal life. Challenges are being faced to get freshwater for the areas having a low amount of usable water. This study aims toasses and evaluates the feasibility of removing nitrate from groundwater byusing cheap approaches. A pilot-scale solar distillation membrane filter, wasdesigned and constructed for this study, the set up was designed into twopartitions: i) water heater and ii) membrane distillation. The effect of severaloperating parameters such as feed and distillate temperature, nitrateconcentration, and pH, on water flux and nitrate removal efficiency, wasinvestigated. The results showed that …
Isolation And Identification Of Ureolytic Bacteria Isolated From Livestock Soil To Improve The Strength Of Cement Mortar, Hussein Khadhim, Saad Ammar, Shahlaa Ebrahim
Isolation And Identification Of Ureolytic Bacteria Isolated From Livestock Soil To Improve The Strength Of Cement Mortar, Hussein Khadhim, Saad Ammar, Shahlaa Ebrahim
Engineering and Technology Journal
The aim of the present study is to isolate and recognize calciumcarbonate-producing bacteria and to check these bacterial strains for use incement mortar to improve its properties such as strength and water absorption.Bacteria were isolated from livestock soils were examined for urease producingactivity, the possibility to precipitate calcite and its activity to improve thecompressive strength. Based on the results, four isolates were selected andidentified. They were characterized as B. atrophaeus, B. subtilis, B. aryabhattaiand B. amyloliquefaciens. Experimental work was performed to evaluate theeffect of bacterial concentration in term of optical density (OD) on thecompressive strength. Bacterial cement mortar samples revealed …
Recycling Of Sewage Sludge Ash In Polymer Structures, Mohamad Alsaadi, Aseel Al-Zubaidi, Mukhallad Haider, Hasanain Hashim Hashim
Recycling Of Sewage Sludge Ash In Polymer Structures, Mohamad Alsaadi, Aseel Al-Zubaidi, Mukhallad Haider, Hasanain Hashim Hashim
Engineering and Technology Journal
In this study sewage sludge ash (SSA) particles were used as filler in the polyester resin to fabricate particulate composites with various filler contents of 0, 1, 2, 3, 4, 5, 6 and 7 wt%. The tensile, flexural, impact, hardness, chemical composition and scanning electron microscope tests wear done on the samples in accordance with ASTM standards. The results were improved at the particle content of 5 wt% for the tensile and flexural strength and then showed reducing trend with extra particle addition. Tensile and flexural modulus values of the particulate polyester composites significantly enhanced compared with the unfilled polyester …
Hydrogeologic Sustainability And Mitigation Of Shallow Groundwater Against High Saline And Chemical Pollutants, Najah Al Maimuri, Arkan Ali, Abdulhadi Al-Sa’Adi, Mohammed Abed Abed
Hydrogeologic Sustainability And Mitigation Of Shallow Groundwater Against High Saline And Chemical Pollutants, Najah Al Maimuri, Arkan Ali, Abdulhadi Al-Sa’Adi, Mohammed Abed Abed
Engineering and Technology Journal
A hydrogeologic study has been adopted to conceptualize the concepts of groundwater levels lowering in swamped area of Tyass, middle of Iraq. 2D dimensional groundwater model and, mitigation model has been used to mitigate the aquifer against high salinity and chemical pollutants by the mitigation theory of heterogeneous subsurface media, which depends upon physical and mathematical derivation, evaluation of chemical pollutants and total dissolved salts (TDS) of subsurface water before and after mitigation process. The water table level was lowered up to 2.43m at the center of a pumping well of abstraction discharge (400m3/day) obtained after 2755days in steady state. …
Effect Of Hashimoto Disease In Diabetic Patients In National Center For Diabetes, Aufaira Nsaif, Wafaa Alfatlawi, Abdulnasser Algobori
Effect Of Hashimoto Disease In Diabetic Patients In National Center For Diabetes, Aufaira Nsaif, Wafaa Alfatlawi, Abdulnasser Algobori
Engineering and Technology Journal
The most two common autoimmune disease in endocrinology was Diabetes mellitus (DM) and thyroid dysfunction (TD). This study aimed to investigate the prevalence of TD in DM patients of type 1. The current study is carried out in the National Center for Diabetes of Endocrine and Genetic (NCDEG), AL- Mustansiriyah University, Baghdad. This study comprised of (36) patients with hypothyroidism diagnosed clinically under supervision of specialist physician in endocrinology. Their ages ranged between (30-40) years, among them there were 17 males (48%) and 19 females (52%). In addition there were (36) healthy control their age ranged between (28-42) years, among …
Weathering Effect On Surface Characteristics Of Superhydrophobic/ Hydrophobic Nanocomposites Coating, Hassan Jaafar, Balqees Aldabbagh
Weathering Effect On Surface Characteristics Of Superhydrophobic/ Hydrophobic Nanocomposites Coating, Hassan Jaafar, Balqees Aldabbagh
Engineering and Technology Journal
Superhydrophobic and hydrophobic nanocomposites coating synthesized by electrospinning, polymer solution of (PS/DMF, PMMA/THF and Si/Th) were prepared in different wt% of composition for each solutions and also prepared with addition of TiO2 nanoparticles. Coated specimens were exposed to accelerated weathering test for 6 months. The aim of this research is to study weathering changes and physical properties of these superhydrophobic and hydrophobic nanocomposites coating to demonstrate these coatings in which can keeps their hydrophobicity properties for long period of time. Viscosity, surface tension, contact angle, roughness surface and hardness tests were calculated for all specimens before and after submitted to …
Design Analysis Of A Compensation Technique In Fso Communication System To Mitigate Atmospheric Turbulence Effect, Jenan Kalati, Shehab Kadhim
Design Analysis Of A Compensation Technique In Fso Communication System To Mitigate Atmospheric Turbulence Effect, Jenan Kalati, Shehab Kadhim
Engineering and Technology Journal
Free-space laser communication systems usually experience strong channel fading caused by atmospheric turbulence. To mitigate the impact of atmospheric turbulence on free-space optical links using compensation techniques including adaptive optical (AO) system as advanced technique. Its three main components have remained constant: a wave front sensor to measure distortion, a wave front corrector to compensate for the distortion and a control system to calculate the required correction and necessary shape to apply to the corrector. Optical communication schemes utilizing adaptive optical at the transmitter are proposed. Numerical simulations show that the proposed schemes can significantly reduce the channel fading. The …
A Modified Matrices Approach In Advanced Encryption Standard Algorithm, Abdul Monem Rahma, Atheer Abbas
A Modified Matrices Approach In Advanced Encryption Standard Algorithm, Abdul Monem Rahma, Atheer Abbas
Engineering and Technology Journal
The cryptographic algorithms became the main proceeding for protection of very important data from unauthorized access. There are several cryptographic algorithms to ensure the data, but algorithms must be selected according to speed, strength and the implementation. Thus, choosing the advance encryption standard (AES) for encryption and decryption data because its speed and strength of encryption, flexible, complex processing and its resistance to Brute-force attack. This paper presents enhancement of the AES algorithm to increase the security of the encrypted documents by using different sizes data matrices based on multiple irreducible polynomials with order 2, 4, and 8. The proposed …
Synthesis And Fabrication Of Zno Nanorods On Silicon For Methanol Gas Sensor, Abdulqader Faisal, Mofeed Jaleel, Fahad Kamal
Synthesis And Fabrication Of Zno Nanorods On Silicon For Methanol Gas Sensor, Abdulqader Faisal, Mofeed Jaleel, Fahad Kamal
Engineering and Technology Journal
Zinc Oxide nanorods (ZnO NRs) were successfully synthesized via hydrothermal method. The growth process was conducted with seed layer concentration of 30 mM. The as-synthesized nanostructures were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and ultraviolet-visible (UV-VIS) spectrophotometer. The analysis results revealed a pure Wurtzite ZnO hexagonal nanostructures with preferred orientation (002) along c-direction. The calculated band gap and crystallite size are 3.2 eV and 53.18 nm respectively. A methanol gas sensor was fabricated based on the annealed ZnO NRs on the silicon substrate. Optimized sensitivity at 250 ppm methanol vapor with fast response …
Security Improve In Zigbee Protocol Based On Rsa Public Algorithm In Wsn, Nabaa Hasan, Alaa Farhan
Security Improve In Zigbee Protocol Based On Rsa Public Algorithm In Wsn, Nabaa Hasan, Alaa Farhan
Engineering and Technology Journal
ZigBee is consuming low energy and providing the protection in Wireless Sensor Networks. ZigBee pro is supporting most applications. In spite of improved the security, ZigBee pro weak in key administration. In this paper, we depend on Logistic Map Diffie Hellman (LMDH) and SubMAC for Wireless Sensor Networks by ZigBee. In addition, we will improve the security in ZigBee by using the Rivest-ShamirAdleman (RSA) algorithm instead of Advanced Encryption Standard (AES). LMDH used for improved key administration schema (protect key distribution) and SubMAC used for providing authentication and prevented Man-In-The-Middle (MITM) and Replay attacks, LMHD did not provide this service, …
Analysing Some Mechanical Properties Of Cinnamon Powder Reinforced With Polymeric Materials Used In Dental Application, Ahamed Alghabban, Reem Mohammed, Jumaah Mahmood
Analysing Some Mechanical Properties Of Cinnamon Powder Reinforced With Polymeric Materials Used In Dental Application, Ahamed Alghabban, Reem Mohammed, Jumaah Mahmood
Engineering and Technology Journal
In the dentures industry, materials must be chosen to have good mechanical properties in order to resist the conditions that may occur in the mouth. A study was conducted to assess tensile strength, elasticity coefficient, elongation, flexural strength, flexural modulus with impact properties of poly methyl methacrylate resin as matrix strengthened with cinnamon powder and also analysing these mechanical properties by using (OriginLab) software program. The samples of Poly Methyl methacrylate bio composites which containing 2%, 4%, 6%, and 8% weight fractions of cinnamon powder and an unfilled as control sample were fabricated using “hand lay up” method. The results …
Design Of N-Bit Adder Without Applying Binary To Quaternary Conversion, Walaa Khalaf, Dhafer Zaghar, Kadhum Al-Majdi
Design Of N-Bit Adder Without Applying Binary To Quaternary Conversion, Walaa Khalaf, Dhafer Zaghar, Kadhum Al-Majdi
Engineering and Technology Journal
Microprocessor has been considered as most important part in ICs manufacturing and making progress since more than 50 years, so increasing microprocessor speed is paid attention in all technologies. ALU is known as the slowest part in microprocessor because of the ripple carry, nowadays microprocessor uses 8-uints as pipeline, each one has 8-bits for implementing 64-bit, working in this form has been captured the microprocessor development and limited its speed for all its computations. Parallel processing and high speed ICs always trying to increase this speed but unfortunately it remains limited. The contemporary solution for increasing microprocessors speed is the …
A Survey On Deceptive Detection Systems And Technologies, Harith Thannoon, Wissam Ali, Ivan Hashim
A Survey On Deceptive Detection Systems And Technologies, Harith Thannoon, Wissam Ali, Ivan Hashim
Engineering and Technology Journal
There are many types of indicators that have been proven to be useful clues for deceptive detection techniques, and most of this indicators that have been presented and proven by psychology to be signs of lying. This paper presents a survey of most popular deceptive detection systems. Many techniques for lie detection have been presented by researchers; most of them are reviewed in this paper. This study focus on the algorithms, which are presented in some pervious work, and how the database has been collected for each technique, furthermore explain the adopted cues for each deception detection technique. The accuracy …
Design Of Double Notch Band Half-Elliptical Shape Reconfigurable Antenna For Uwb Applications, Haydar Al-Tamimi, Salah O.
Design Of Double Notch Band Half-Elliptical Shape Reconfigurable Antenna For Uwb Applications, Haydar Al-Tamimi, Salah O.
Engineering and Technology Journal
A compact ultra-wideband (UWB) reconfigurable antenna with dual band-notched properties is presented in this paper. The dual notch band half – elliptical reconfigurable antenna is fed by (50 Ω) microstrip feed lines and it is printed above an FR-4 substrates (32 × 32.6) mm2 dimensions. This dual band notched characteristic is accomplished by embedding two crossing U-shaped slot in the half-elliptical radiating patch of the proposed reconfigurable antenna. The modeling procedure and performance evaluation of the presented antenna was achieved by using the electromagnetic simulator software, (CST) Computer Simulation Technology. The measured bandwidth of the presented antenna for (VSWR < 2) spans 2.6 GHz to 12 GHz, which covers the entire UWB band of 3.1 GHz to 10.6 GHz, with a controlling dual notched band (VSWR > 2) …
Performance Of Geopolymer Concrete Exposed To Freezing And Thawing Cycles, Mohammed Shamsa, Basil Al-Shathr, Tareq Al-Attar
Performance Of Geopolymer Concrete Exposed To Freezing And Thawing Cycles, Mohammed Shamsa, Basil Al-Shathr, Tareq Al-Attar
Engineering and Technology Journal
In this study, the effect of rapid freezing and thawing (ASTM C666 – procedure A) on three different types of Geopolymer concrete studied using three types of pozzolanic material: fly ash, metakaolin and ground granulated blast furnace slag (GGBFS). The Geopolymer concrete was prepared using 400 kg of the pozzolanic material with alkaline liquid prepared at 8 molar concentration with normal fine and coarse aggregates. The ratio of alkaline to fly ash and GGBFS was 1.5: 1 and for metakaolin was 2: 1 for workability and compressive strength requirements. Specimens (100 × 100 × 400) mm were exposed to 100, …