Periodicals of Engineering and Natural Sciences (PEN - International University of Sarajevo)
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Mathematical simulation of memristive for classification in machine learning
Get PDFOver the last few years, neuromorphic computation has been a widely researched topic. One of the neuromorphic computation elements is the memristor. The memristor is a high density, analogue memory storage, and compliance with Ohm\u27s law for minor potential changes. Memristive behaviour imitates synaptic behaviour. It is a nanotechnology that can reduce power consumption, improve synaptic modeling, and reduce data transmission processes. The purpose of this paper is to investigate a customized mathematical model for machine learning algorithms. This model uses a computing paradigm that differs from standard Von-Neumann architectures, and it has the potential to reduce power consumption and increasing performance while doing specialized jobs when compared to regular computers. Classification is one of the most interesting fields in machine learning to classify features patterns by using a specific algorithm. In this study, a classifier based memristive is used with an adaptive spike encoder for input data. We run this algorithm based on Anti-Hebbian and Hebbian learning rules. These investigations employed two of datasets, including breast cancer Wisconsin and Gaussian mixture model datasets. The results indicate that the performance of our algorithm that has been used based on memristive is reasonably close to the optimal solution
Cloud computing and IoT integration for health checking system
Get PDFWith the raise of technologies in the fourth industry revolution, Internet of things appeared as an emerging technology, especially, in the healthcare industry. The cloud computing as a main section of IoT structure can be a great integration to get more benefits to provide healthcare for our society. In this paper, researchers more concentrated on individuals and autonomous extension of solitary strategies, with less emphasis on patient monitoring. While the main aim of technology management of healthcare information systems has been accomplished throughout the proposed combination of Internet of Things and Cloud Computing in the context of medical profession. A low-cost, secure, and trusted healthcare tracking system that offers real-time monitoring dashboard for biological indicator has been proposed. The utilization of this integration to track and control health system was applied, thus, a remotely controlled platform based on the cloud computing design paradigm has been developed in the field of health information, while an efficient algorithm in future hospital cloud service and monitoring system implementations have examine and evaluate this design. A CloudSim simulation results showed that the proposed algorithm revealed better results from analogue anneals algorithm and ant colony optimal design with an improvement of 40% in the system efficiency. Therefore, the integrated proposed algorithm is of an importance to be developed and could be applied to non-coordinate system to improve solutions to the optimization and scattering
Analysis of multivariate time series for some linear models by using multi-dimensional wavelet shrinkage
Get PDFThe wavelet transform for multivariate time-series analysis and prediction is performed using an automatic slow distribution model and the prediction accuracy is compared with the normal method through the use of statistical criteria. By taking the variables represented by the gross domestic product as a response variable and air pollutants as explanatory variables represented by the emissions of nitrous oxide and carbon dioxide in Iraq. The study showed that there is an inverse relationship between the emissions of carbon dioxide and gross domestic product, while a positive relationship between the emissions of nitrous oxide and gross domestic product. And that the variables analysis and prediction after performing the wavelet transform of the data is the best because it contains the lowest values of the mean square error criterion and the mean criterion of absolute error
Influences of modernism in urban development of Sarajevo in the period 1945-1980
Get PDFIn accordance with the state strategy oriented to the industrialization and urbanization many of Yugoslav cities had strong and rapid development that was visible in appearance of new parts of the city or even totally new cities in surrounding of new established industrial areas. On the example of Sarajevo, we can observe implementation of ideas related to modernist architecture and urbanism promoted in many European countries during bigger part of 20th century. From wandering in treatment, beginning ignorance and latter acceptance of authentic heritage from Ottoman and Austro-Hungarian period to the Modernist era of massive construction of new parts of the city. Direction of work and thinking of domestic architects leaded by Juraj Neidhardt created specific way of considering Bosnian traditional architecture as inspiration and base for development of authentic modernism related to the wide range of contextual premises that in theory of architecture was recognized as “Sarajevo school of architecture”. At the same time massive construction of new urban areas was searching for efficient solutions of industrial and prefabricated systems that were developed and widely used in all Yugoslavia. Design of all new settlements strived to planed and built into consideration to principles of Athens charter with accent to sun oriented and functional residential units, with enough greenery and open public zones, with regulated and distribution of educational, service and commercial facilities in every new established neighborhood. Despite to social, urban and construction quality issues that appeared in new developed urban areas from the period of socialist Yugoslavia, we can talk about relevant and innovative concepts promoted by modernist architecture and urbanism that was under constant and comprehensive improvement process which reach high range of quality very relevant from the perspective of European modernism
Some new results of completion t^ω- Normed approach space
Get PDFIn this paper, the completion of t^ω-approach spaces, isometric in t^ω-approach space and equivalent sequences are defined. Every t^ω-approach normed space can be embedded in t^ω-approach Banach space is proved, χ ̃ and an isometry ψ from χ onto the subspace F of χ ̃ which is dense in χ ̃ are introduced, as well as, the completion is shown an uniquely up to an isometry. In addition, to what is mentioned above, some essential definitions, examples, and important theorems are included to illustrate some of our work
Experimental study on repair of cracked pipe under internal pressure
Get PDFRepair of cracked pipeline under internal pressure has been investigated in the present study. To this aim, an experimental test has been done on the cracked pipeline to find failure pressure. A longitudinal crack that cut 65% thickness of pipe has been applied on the external surface. Carbon fiber reinforced polymer has been used to repair the system. Additionally, a finite element model has been developed to estimate failure pressure of the unrepaired pipes. The results show that the failure pressure in unrepaired pipes is identical to the failure pressure predicted by the standards for corroded pipes, however, the failure pressure of repaired system is lower than the predicted results of standard for corroded pipelines. 
Estimation of nonparametric regression function using shrinkage wavelet and different mother functions
Get PDFWavelet reduction is one of the most widely used methods for removing noise from the signal, primarily financial and banking data, and building a non-parametric regression model that enables us to study the phenomenon accurately. The appropriate choice of the wavelet mother, which results in concentrating the bulk of the signal strength on a few wavelet coefficients, is one of the most determining factors in noise removal and obtaining accurate regression function estimates. Given the importance of studying the price index in Iraq, many mother functions within the wavelet transformation have been studied. To determine which of them is more suitable for such a type of data, which gives accurate estimates of the relationship between trading volume as an independent variable and the Iraq market index as a dependent variable, the best or most appropriate functions were determined through the estimates that have less (MSE). It became clear that the best or relevant parts are (Coif1, Coif5, and rbio1.3).
The study was applied to real data represented by the trading volume and price index data for the Iraqi market for the period from (2008) to April (2022). It became clear that the trading volume significantly affects the price index, but other variables must be studied
Histological and immunohistochemical study of thyroid gland in Caucasian squirrel (Sciurus anamalus) (Gmelin, 1778) by using marker (Anti-Thyroglobulin, Code IR5090)
Get PDFThe current study is designed to investigate the histological and immunohistochemical characteristics of the thyroid gland in adult male Sciurus anamalus. This study found that the thyroid gland of the Caucasian squirrel is located in the neck area, below the larynx, on both sides of the trachea. It has two lobes (right and left) with cylindrical shape. The histological studies revealed that the thyroid gland is surrounded by a capsule which consists of connective tissue and forming of two layers which are outer layer and inner layer, and a layer of adipose tissue appears overlapping the outer layer. The inner tissue of the gland consists of follicles with different shapes and sizes, and is lined with simple cuboidal epithelial tissue (follicular cells). Sometimes it appears in the form of high or low cuboidal epithelial tissue, in dependent on the functional activity state of the gland, and the follicles cavities are filled with colloid. In addition, there are two kinds of cells spread in the gland tissue, follicular cells and parafollicular cells, and they are fewer in number and larger in size than follicular cells and appear either singly or in the form of clusters and occupy two sites between the follicles or within the follicle. Immunologically, the results observed an immune response to thyroglobulin antibodies to detect the protein secreted by the follicular cells, which in turn secreted it to the colloid. Moreover, the immune response appeared clear in the cell membrane of the follicular cells and the colloid through the appearance of the brown color which is specific to the immune reaction
Solving multi-objective supply chain management using non-dominated sorting genetic algorithm
Get PDFFocusing on production processes is the decisive factor in managing an efficient supply chain that leads to the company\u27s success. The objective constraints in the model include all the goals the company seeks to achieve and the level to achieve for each. In addition to clarifying the contribution of each decision variable in achieving the specified levels of the different goals, the conclusions reached are the results that prove the possibility of solving a problem. Applying the mathematical model according to the demand for parts (derived from the demand for the final product) contributed significantly to saving the stock of raw materials, as (100) refers to the quantity that is kept as a regular stock for the first week and varies from one week to another according to the change in demand. As a result of reducing the stock of materials, the costs associated with it will decrease, and the difference can be seen in the total costs of storing raw materials and semi-manufactured parts, which is estimated at (47929.1) Iraqi dinars) for the storage of materials and parts for all weeks, according to the planning periods established by the company. By applying the genetic algorithm, the total storage costs were calculated, and it was (13024.8) Iraqi dinars, which is the most critical indicator of success in improving the supply chain performance
Effect of shielding gas on microstructure and mechanical properties in AA6061-T6 alloy MIG welding
Get PDFDue to its properties such as high strength/weight ratio, enhanced corrosion resistance, low density, AA6061-T6 aluminum alloy welding is widely used in structural, automotive and rail industry. In this study, AA6061-T6 alloy was welded with robotic metal inert gas technique using ER5356 filler wire. The effects of different shielding gas composition ratios (argon/helyum) on the macro / microstructre, mechanical properties (hardness, tensile strength) of the weld joint were investigated. Welding porosity decreased with the addition of helium gas to argon gas. Accordingly, the tensile strength of welded joints increased from 190 MPa to 221 MPa with the addition of helium gas. The strength of the welded joints (190-221 MPa) was obtained lower than that of the base material (290 MPa) due to the changes in the microstructure as a result of the weld thermal cycle and grain coarsening in the heat affected zone. Dentritic, columnar and coarse shaped grains were observed along the weld section, respectively in the weld bead, partially melted zone and heat affected zone. The differentiation of the shielding gas composition did not cause these regions to change, but the heat affected zone expanded with the increase in the helium content. The change in hardness of the cross section of welded joint has increased from around 60 HV to 90 HV from the welding area to the base material. 25% Argon-75% Helium gas mixtures provided optimum combination in terms of microstructure, mechanical properties and cost