Monday, 1 January 2018

Engineering Journal: December 2017

Engineering Journal: published its volume-3, Issue-11, November 2017 with AD Publications

Theoretical and Experimental Studies on Piezoelectric Thermal Fire Annunciator

Abstract The paper presents theoretical and experimental studies on testing the possibility of using piezoelectric converters as a signaling device in fire protection systems. The advantage of this process is the absence of the necessity to connect electrical lines, which in most cases they themselves cause fire.

Keywords Piezoelectric converter, transformer mode, depolarization, signaling device, fire security.

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Language and Didactic potential of Ukrainian for Specific Purposes Teaching forms in Developing Future Navigators’ Text Formation Competency

Abstract The article is devoted to determining the peculiarities of the organization of future navigators ’text formation competence development during various forms of training on the basis of the analysis of scientific literature on language teaching methods. On the basis of analysis, generalization and systematization of scientific sources, we elucidated the forms of organization of language teaching (lectures, practical classes, seminars), which enable to improve the future navigators’ ability to summarize, review and an notate texts that ensures the development of their textual competency. The conclusions drawn in the article can be used during theoretical justification and practical development of a methodology for developing future navigators’ and marine educational institution scadets (students)’ text formation competency.

Keywords language teaching material, methods of development, teaching methods, text formation competency, lecture, practical class, seminar, speech skills, future navigators.

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Research of image registration algorithm based on template matching

AbstractIn order to provide support for image registration, the application of template matching in image registration is studied. This paper sums up four types, introduces the principle of each algorithm, and compares their advantages and disadvantages through simulation experiments: Based on the gray information of the algorithm is simple and real-time, but for complex image and low gray contrast images, cross matching results; mathematical transform based on the complex, large amount of calculation; mutual information does not require preprocessing, registration effect is good, is the research hotspot at present, but ignores the spatial relationship between pixels.

KeywordsImage registration, Image matching, Template matching.

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Role of the Cluster Analysis in Logfacies and Depositional Environments Recognition from Well Log Response for Mishrif Formation in Southeast Iraq.

AbstractThe recognition of depositional environments from well logs is based on the principle that well log responses are related to changes in thickness, texture, grain size and lithology along the well path. The variations in sedimentary rock response are due to reservoir heterogeneity. A similar set of log responses that characterizes a specific rock type and allows it to be distinguished from others, have defined an electrofacies.Cluster analysis includes a broad suite of techniques designed to find groups of similar items within a data set. Partitioning methods divide the data set into a number of groups predesignated by the user. Hierarchical cluster methods produce a hierarchy of clusters from small clusters of very similar items to large clusters that include more dissimilar items. Hierarchical methods usually produce a graphical output known as a dendrogram or tree that shows this hierarchical clustering structure.The method has tested on a 398.5 m thick interval of Carbonate deposits in a vertical well from Amara field, located in southeast Iraq. Modal data have collected from both core and cutting samples. Cluster analysis and electrofacies classification have performed using advance interpretation in Interactive Petrophysics software version 3.6.Carbonate microfacies and marine depositional environments studied for Mishrif Formation depended on the available thin sections though they were not enough to cover all the depositional environments of Mishrif Formation. Therefore, previous studies and well logs were also depended in this study.Correlation of determined logfacies with those defined from cores and cuttings is fundamental to check the reliability of used methods and to define a meaningful cut off level for wells from which no cores or cuttings are available.

KeywordsCluster analysis, Mishrif Formation, Logfacies, Well Logs response.

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Experimental study on treatment of municipal sludge by electro-osmotic method

Abstract The main purpose of the electro-osmosis method in engineering is to reinforce the foundation. The electro-osmosis method has a lot of research on the foundation reinforcement. The most application is the experiment of electro-osmotic combined loading. The experiment on treatment of heavy metals in municipal sludge by electro-osmotic method is still in a blank state. In this paper, the changes of basic physical properties of sludge before and after electro-osmosis and the changes of heavy metals in sludge before and after electro-osmosis were analyzed. The feasibility of electro-osmotic treatment of heavy metals in sludge was verified by comparing the content of heavy metals in the sludge with the standard value of soil environmental quality after electro-osmotic treatment.

Keywords Electro-osmotic method, Physical properties of sludge, Heavy metal, Experimental research.

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Experimental Investigation of Thermal Performance of Photovoltaic Thermal (PVT) Systems

Abstract The phenomenon of photovoltaic systems is based on the principals of semiconductor physics and they operate with a semiconductor element, such as silicon. Photovoltaic cells can generate electricity only when they receive a certain amount of photon energy and thus they convert only a fraction of the solar irradiance, which is received from the sun in the form of electromagnetic radiation in the electromagnetic spectrum, into electrical energy. The remaining radiation is stored as heat in photovoltaic systems, causing some irreversibilities in the system.

In general, the experimental setup, the accumulated heat, which reduces the efficiency of the photovoltaic systems, is aimed to be removed from the system and turned it into useful energy. By employing some heat transfer enhancement systems, the photovoltaic cell temperature decreased to the range of 40-60 °C, the temperature range at which a photovoltaic system runs optimal, whereby an approximate improvement of 20% in electrical efficiency of the PV system achieved. Aluminum and copper cylindrical fins or some refrigerant fluids used as heat transfer enhancement elements in the systems.

In this operating conditions, the electrical efficiency of the system decreases to around 6.5% down from the nominal electrical efficiency of 12% under optimal operating temperature. The fin surface temperature and ambient temperature of the control volume decreased in direct proportion to the air velocity. At about 5 m/s air velocity, the fins bodies and ambient air were cooled down by about 50%, accordingly, the electrical efficiency decreased from 12% to only 9.5%.

Keywords Thermal efficiency of PV cells; electrical efficiency; copper fins; aluminum fins; pv/t systems.

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Material structure particularity of polyethylene-terephtalate (PET) and poly-lactic (PLA)

Abstract - The huge amount of synthetic plastics are used in the packaging area, especially in food packaging, because there have great effects in the environmental and alternative, more ecologic materials are being required. Poly-lactic acid (PLA) is one of the most significant biodegradable thermoplastic polymers. It is compostable and made it from renewable sources. The mechanical and optical property of PLA is very similar to the Polyethylene, but is more fragile, less heat-resistant and offer low resistance to oxygen permeation. In this work, two commercial PLA foils and one commercial PET foil properties were examined. The correlations between the mechanical, thermal and barrier properties were analyzed. From these measurements we can understand the PLA is a usable for packing applications, especially in the sweet manufacturing. Films were studied by tensile testing, differential scanning calorimetry and thermally simulated discharge analysis.

Keywords— PET, PLA, stretching, mechanical properties, TSD, DSC, crystal structure.

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The Impact of Different Electric Connection Types in Thermoelectric Generator Modules on Power

Abstract Recently, there is a need for increase in energy efficiency and more energy due to increase in the human population and increased production with the development of technology. This pushes scientists to search for alternative energy. In this respect, interest in renewable energy sources is increasing day by day due to the fact that it is clean energy. Thermal sources have some advantages when compared to other sources, which is why they are at the forefront of renewable energy sources. Today we make use of thermal sources in many fields ranging from greenhouse, fish breeding, thermal facilities, city heating and electricity production. When generating electricity from geothermal electricity conventional methods such as steam turbine-generator cycle are used as well as innovative methods such as semiconductor thermoelectric modules. In the light of developing technologies and researches, we know that we can produce electricity using the heat that the thermal energy gives out while it is being transmitted from one place to another. In this study, in order to shed light on the technological developments in electricity generation using thermal sources, Thermoelectric Coolers (TEC) which convert heat energy into electricity have been used. Two different TEC1-12706 and TEC1-12710 materials from the market were used. The effects of the serial and parallel connections of these materials on the generated power have been observed. Following the experimental studies, the reactions of the different connection types of the TECs to the load were examined. It was observed that the power values obtained from different TECs used varied according to the connection types, both loaded and unloaded.

Keywords Electricity generation, Output power and efficiency, Renewable energy sources, Thermoelectric generator, Thermoelectric modules.

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Categorizing software vulnerabilities using overlapping self-organizing map

Abstract Software has always been vulnerable to various vulnerably issues. Increasing the number of vulnerabilities and their complexity in the software area has made it more important to categorize them. In this research work, by selecting the MoSCoW prioritization method and by combining it with the SOM self-organizing mapping algorithm, we present a new categorization for the frequent software vulnerabilities. We implemented the proposed method in MATLAB using the relevant tool boxes. The experimental results were evaluated using in-class and out-of-class distance measurements. Classification of software vulnerabilities using OSOM algorithms gives us better results than conventional clustering methods. It can be inferred that the classification of software vulnerabilities is of particular importance in improving the security of a software application. The proposed algorithm can provide an appropriate categorization by taking advantage from the existing overlapping feature.

Keywords Overlapping, Overlapping Self-Organizing Map, Software Vulnerability, Vulnerability Categorization.

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Engineering Journal: January 2018

Two-Dimensional Numerical Simulation of Bed Level Variation around Vertical Wall Bridge Abutments Abstract— An accurate prediction of bed ...