Periodicals of Engineering and Natural Sciences (PEN - International University of Sarajevo)
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A New Architecture for monitoring Land use and land cover change based on remote sensing and GIS: A Data mining Approach
Get PDFThe issue of land use (LU) and land cover change (LCC) has become crucial around the world in recent years, not only for researchers, but also for urban planners and environmentalists who advocate sustainable land use in the future. In Morocco, this phenomenon affects large areas and is all the more pronounced because the climate is arid with cycles of increasing drought and soils are poor and highly vulnerable to erosion. In addition, the precarious living conditions of rural populations pushes them to over exploit natural resources to meet their growing needs, which further amplifies environmental degradation. In this LU/LCC monitoring context, this paper aims on one hand at giving a clear survey of classical methods and techniques used to monitor LU/LCC, on other hand the authors propose a new architecture whose objective is to integer data mining techniques to the LU/LCC monitoring in order to automatically and efficiently improve the monitoring, control and asset management in LU/LCC
A cascaded H-bridge multilevel inverter with photovoltaic MPPT control
Get PDFThis article presents the five levels H-Bridge cascaded multilevel inverter with photovoltaic MPPT control. The power source is composed of photovoltaic panels used as DC inputs for the cascaded H-Bridge Multilevel Inverter. The present work aims to present a control strategy to produce the best output quality possible. The algorithm P&O extract from the panels the maximum power while the supervision system tends to control the DC levels in the CHMLI inputs. Each panel possesses its own MPPT module and the cascaded H-Bridge Multi-Level Inverter uses the modules as entries to produce a staircase waveform output. A simulation using matlab/simulink is realized to verify the system performance
Development of Computer-Aided Industrial Design Technology
Get PDFWith the development of science and technology, industrial design industry also in development, and at the same time, the industrial market in the design of the products of industry, the species diversity of interest requirement also become increasingly strict. In order to ensure that the industrial design in terms of quality and quantity can better development, computer aided design of the industry establish human-computer interaction, become the key factors of industry design. This paper puts forward based on computer aided the origin of the industrial design, and then puts forward computer-aided industrial design of man-machine interaction of the concept and characteristic, and human-computer interaction application in industrial design, and finally to the future development of human-computer interaction made planning and prospected
Comparative Life Cycle Costing Analysis of Green Roofs: The Regional Aspect
Get PDFThe increasing environmental concerns and poor practices force construction industry to take some remedial measures for green and sustainable built environment. Especially in urban areas, one of these measures is to build green roofs for minimizing the environmental pollution. In fact, green roofs present a number of economic, environmental, and social benefits. However, compared with traditional roofs, green roof investments have high capital and maintenance costs and this makes potential investors hesitant about their applications. Therefore, in the present study, benefits and life cycle costing parameters of green roofs were evaluated through a literature review. In this context, numerical inputs and findings of past studies were utilized. In doing this, a special emphasis was placed on the regional characteristic of such investments as it is a natural feature of any life cycle costing analysis. In conclusion, the majority of benefits and life cycle costing parameters was found to be highly variable, and thus, any life cycle costing assessment that will be performed in the future should be case-sensitive instead of using some generalized or raw data. Therefore, based on findings and results of this study, industrial practitioners and potential customers may have a useful source of economic, environmental, and social information about green roofs while researchers may be encouraged for more region-specific studies
Production of Dye from Green and Brown Walnut Shells for Leather Coloration
Get PDFNowadays, it is observed that there is an increasing approach to the use of natural substances instead of synthetic ones. As the synthetic materials and products are more complex in comparison to natural substances, it will take a long time to complete their natural cycles and return to nature, thus, causing a lot of environmental pollution. Green and brown shells of walnuts that are not only valuable crops but also important components of the Mediterranean diet are by-products of the walnut production, having scarce use (especially green shell). Thus, using shells as a source of dye will increase the value of the walnut production, as well as offering utilization for a by-product, which is produced in large quantities. The purpose of this study is to produce dye from waste green and brown walnut shells, compare quality of these dyes and apply them separately in untreated leather. Before chemical processes, the walnut shells were chopped in a grinding mill. They were dried in an oven to eliminate the humidity and extracted in Soxhlet apparatus by using ethanol solution. Then, the ethanol solution was evaporated in controlled way and the produced dyes were mordanted by using potassium aluminium sulphate (PAS). The dyes were analysed by TLC and UV-Vis, whereas dyed leathers were analysed by colorfastness test. The present study showed that brown walnut shell dye having higher color values was better for yield, dye penetration and fastness properties compared to green walnut shell dye. Luminous effect was observed when these dyes were applied in leather. It is interesting, uncommon and economically valuable for leather industry. This study would be a positive step to meet the need of leather industry in Turkey and a good example for cleaner production
A Proof of Concept for Home Automation System with Implementation of the Internet of Things Standards
Get PDFWho does not want a home having comfortability, security, safety, and reliability? Asystem of interconnected devices and sensors with internet of things standards cancommunicate independently with less or no human interaction. With such a system,everyday tasks (e.g., control of light, heat, humidity, air flow, and etc.) in and aroundour living units can be simplified. It also adds a list of desirable states, e.g., economy,peace of mind, comfortability, convenience, logistics, security, safety, and reliability.In this paper, an approach for home automation system that brings miscellaneous tasksin our living units into one centralized action point and functions with remotely controlled devices (e.g., smartphone, iPad, laptop, and etc.) has been implemented. Thenecessity to visit individual device involved in corresponding task has been perished.The proposed model is free of construction impediments as it deems to be developinga system alongside the architecture of the household. It is a proof of concept. So itspotential serviceability for many real world applications is extremely high
Classification and Detection of Various Geographical Features from Satellite Imagery
Get PDFThis paper presents the method of creating Expert system for decision support on the Android platform. The system knowledge base for the given area of expertise is generated by inductive learning methods based on examples from the WEKA data research system. The system was realized using the Expert System shell for the e2gDroid lite mobile device, based on the application area and a set of training examples, specifically based on the Covertype DataSet qualification problem
Validation of Stresses with Numerical Method and Analytical
Get PDFIn this study, the goal is to confirm stresses under kind of loads, with analytical and numerical methods. But each material is drawn in SolidWorks 3D design software, and exported to ANSYS. Also the other purpose is to give information about type of stresses and formulation of each stress with different loads
A Review on Superalloys and IN718 Nickel-Based INCONEL Superalloy
Get PDFIn this study superalloys, their processing and application areas have been researched. The superalloys arewidely used in the industrial production fields such as aircraft, nucleer, space industry and so on due to superiorproperties at high temperature and resistance to metallurgical and structural variations. The most important groupsof the superalloys is Ni, Fe and Co-based superalloys. Also processing of the superalloys are investigated and anothergoal of the present paper is to investigate microstructure and mechanical properties of IN718 nickel-based inconelsuperalloy subjected to strengthening heat treatment. 
Ultrasonic welding of dissimilar materials: A review
Get PDFDuring the last few years ultrasonic welding has become significant attention regarding itssuitable applications in comparison to traditional welding techniques. Bonding of dissimilarmaterials has always been a challenging task due to poor control on grain size and sensitivemechanical properties that could have been made by joining with traditional weldingtechniques. Moreover, joining dissimilar materials such as Aluminum/steel, metal/glass,Aluminum/copper had not been achieved without the usage of ultrasonic welding technique.This work presents a review of literature regarding the usage of ultrasonic welding techniquein many applications. Additionally, this paper provides different examples and applications ofultrasonic welding technique and its application. Main advantages of this technique are,clean and undamaged exterior parts of weld, power savings, stable and strong bond, timeefficiency