Yanbu Journal of Engineering and Science (YJES)
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SYNTHESIS AND CHARACTERIZATION OF NEW AZO-SCHIFF BASES AND THEIR BIOLOGICAL ACTIVITY
No full textThis work focused on the synthesis of new azo Schiff bases which were prepared by condensation of 3-formyl-4-hydroxy phenylazo benzene with both 1,3-diamino xylylene, 2,6-diamino Pyridine, 1,5-diamino-2-methyl pentane respectively. The Schiff bases were checked by different spectral technique (LC-MS, GC-MS, 1H-NMR, IR). The new azo Schiff Bases were studied for antibacterial activities against (Bacillus subtilis and Staphylococcus aureus) are Gram positive and (Salmonella typhi and Escherichia coli) is Gram negative. The azo compound ligand were exhibited a vari-able activity of inhibition on the growth of the bacteria
CORROSION INHIBITION OF ZINC METAL IN 4M HYDROCHLORIC ACID SOLUTION BY USING NAPROXEN DRUG (2-(6-METHOXYNAPHTHALEN-2-YL) ACETIC ACID) AS AN INHIBITOR
No full textThe inhibition of the corrosion of zinc in 4 M HCl by Naproxen has been investigated at room temperature using weight loss measurements. Results obtained showed that Naproxen is a good inhibitor and its inhibition efficiency (IE %) increased with the increase of inhibitor concentration since it was 82%. The surface coverage was 0.82 at 300 ppm inhibitor concentration, hence the optimum concentration was 300 ppm
THE EFFECT OF ILLUMINATION, NOISE AND TEXT BACKGROUND COLOUR COMBINATION ON READABILITY OF WEBPAGES
No full textInternet and the World Wide Web have had a great development and have become an inseparable part of human life. Several studies have reported investigations regarding the use of visual displays. However, it is generally recognized that there is a need to find the levels of environmental factors and text-background colour combination which may create comfort/discomfort to the users. Therefore, this study investigates the effects of ambient illumination, equivalent noise and text-background colour combination on reading performance of two groups of subjects between age 20 and 31 years; one group having exposure to Internet of less than 2 hours/ day and the second group having more than 2 hours of net exposure per day. Results showed that reading time performance was not significantly affected by ambient illumination (150 lx - 525 lx) for both groups of users. On the contrary, reading time for both groups of users was significantly affected by both equivalent noise and text - background colour combination
ARTIFICIAL NEURAL NETWORK APPROACH: AN APPLICATION TO HARMONIC LOAD FLOW FOR RADIAL SYSTEMS
No full textRadial Distribution Systems (RDS) require special load flow methods to solve power flow equations owing to their high R/X ratio. Increasing use of power electronic devices and effect of magnetic saturation cause harmonics in RDS. This paper reports a multi-layer feed forward ANN with error back propagation learning algorithm for the calculation of bus voltages and power loss for different harmonic components. The proposed method is tested upon a 33-bus RDS and the results are reported for various harmonics. Extensive testing of the proposed ANN based approach indicates its viability for harmonic load flow assessment for radial systems
FACTORS AFFECTING COPPER SORPTION AND MOBILITY THROUGH A AND B HORIZON SOILS FROM THE EASTERN SHORE OF VIRGINIA
No full textIn this research the copper mobility through the A- and B-horizon of Bojac sandy loam was studied. This study included both batch and column processes. The effects of pH, total organic carbon (TOC) and humic substances were investigated. The mobility of copper was found to be higher through A-horizon soil. The pH was found to have a considerable effect on the mobility of copper and TOC. The highest mobility of copper was achieved at pH 6.24 and its mobility through both soil horizons was associated with the mobility of TOC. A study of the humic substances indicated that fulvic acids had 4 times higher sorption capacity for copper than humic acids. The association between fulvic acids and copper, coupled with the mobility of TOC and fulvic acids in the soil, accounted for transport of copper through soil columns
FAILURE ANALYSES OF TOWER CRANE USING FEM AND THEORETICAL STUDIES
No full textThis paper describes the technique to explicitly increase the tower crane’s stability during cyclones through modal analysis in FEM. For this, modal analyses of a boom, mast, and tower crane are carried out individually to minimize the tuning effect of natural frequencies. The study explains the methodology to increase the stiffness using bracings in the mast expressed in modal parameters. In FEM analysis, bracings are applied in fixed support along the vertical mast of the tower crane. For this purpose, a 1/10 scale model of “Potain MCi85 A/B” tower crane was modelled in Nx-Unigraphics. Theoretical analysis of the boom’s natural frequencies and its counterweight is assumed as cantilever beam and mast in form column. The values of natural frequencies of tower cranes under different boundary conditions are obtained through Galerkin and Dunkerley’s mathematical expressions. Theoretical and FEM results established similar trends of increasing stability as revealed in terms of natural frequencies of the tower crane
DECENTRALIZED TREATMENT OF HARVESTED RAINWATER FROM ROOFTOPS IN BURAIDAH CITY, SAUDI ARABIA
No full textWater scarcity is one of the most sensitive issues of this century. Several countries are posed with the same problem of water scarcity in the Kingdom of Saudi Arabia (KSA). Thus, an optimal use of various water resources, including rainwater, is extremely crucial. However, the quality of water needs to be assessed before any usage. The present study investigated the quality of rainwater in the Qassim region of KSA. The building of Civil Engineering Department, College of Engineering, Qassim University, Buraidah was selected as the experimental site. The rainwater from the roof of the department was periodically collected in from October 2011 to July 2012. The harvested rainwater was assessed for the quality and accordingly treated physically and chemically. First, the collected water was pumped onto a filter paper column, type POSI-FLO II, to remove the large particles. Subsequently, four cartridge filters with different filter media, followed by reverse osmosis unit, were used for the treatment. The experimental results demonstrated that the characteristics of the harvested and treated rainwater from the rooftops of building in Buraidah could be used for drinking
Movie Genre Classification from RGB Movie Poster Image Using Deep Feed-forward Network
No full textA movie poster image is one of the important media in the filmmaking process, providing valuable information about the movie, such as movie titles, characters, and genres. Identifying a movie genre from a poster can be a daunting task, as it can relate to multiple genres. To solve this problem, this paper uses a deep feedforward neural network to classify movie genres from movie poster images. In this regard, we used and trained a state-of-the-art InceptionV3 deep neural network. The network is trained on our dataset consisting of 36,423 movie poster images taken from the IMDB website, which is categorized into 28 genres. The model predicts the top three classes with the highest probability of a particular movie poster
Mechanical Characteristics of Hardened Concrete with Different Types of Cement and Aggregate Available in Bangladesh
No full textThis paper presents the results of an investigation on the influence of aggregate and binding material type on the mechanical properties of hardened concrete. To perform this investigation, four different types of coarse aggregate (Brick Aggregate, Recycled Brick Aggregate, Black Stone and Shingles) and eight types of binding material [Ordinary Portland Cement (OPC), CEM Type II B-M, CEM Type II B-M-SL, 40% OPC – 60% Slag CEM IIIA, 80% OPC – 20% Slag(CEM II/A-S), 70% OPC – 30% Slag(CEM II/B-S), 30% OPC –70% Slag(CEM-IIIB), 15% OPC –85% Slag(CEM-IIIC)] have been used. Aggregates were collected and prepared according to grading requirements of ASTM C33-03. Several tests as specific gravity, absorption capacity, unit weight and abrasion resistance were performed for coarse aggregate. Cylindrical concrete specimens of diameter 100 mm and length 200 mm were made with different W/C ratio (0.45 and 0.5) and cement content (340 kg/m3 and 400 kg/m3). A total of 42 different cases were considered for testing. The specimens were tested for compressive strength, stress-strain curve and Young’s modulus at the age of 28 days. Non-destructive test as Ultrasonic Pulse Velocity (UPV) were also performed. To conduct UPV test Portable Ultrasonic Non-destructive Digital Indicating Tester (PUNDIT) were used. The major objective of this study was to investigate the mechanical characteristics of concrete for different types of aggregate and binding materials. The significance of those results is discussed here
STRESS, EQUIVALENT STRAIN AND DEFORMATION FOR MACHINING OPERATION UTILIZING EXPLICIT DYNAMIC ANALYSIS FOR VARIOUS MATERIALS
No full textSubtractive and additive manufacturing methods constitute the two main categories of modern manufacturing technology used in the manufacturing sector. The subtractive method is used for material removal and is performed in (Brass, Aluminum and Teflon), the machining process is achieved using CNC (Computer Numerical Method) turn machine. The main objective of the paper is to perform FEA (Finite Element Analysis) over the three material (Brass, Aluminum and Teflon). The CNC machine is used to perform a machining over the three-material stated above, but within the CNC machine there is no provision for achieving the various values of (stress, strain and deformation) during the machining operation. During the machining process, it’s very difficult to get and accurate value of stress for the tool and raw (test) material, so Ansys FEA analysis method is adopted to predict the parameter like stress, strain and total deformation. The analysis part is achieved by the developing the CAD model using Solid work and FEA analysis using Ansys and thereby the output will be helpful to understand the various stress parameters. The results highlight that Teflon has a higher value for total deformation followed by aluminum and brass. The equivalent strain for the Teflon is higher and followed by brass and aluminum. The stress is acting in axial and compressive direction, so brass have a higher value followed by aluminum and Teflon. This method and analysis procedure can be adopted for understanding the deformation, stress and stain acting on any material, which will be highly useful for material of higher with a higher hardness value