In this review the application of deep learning for medical diagnosis is addressed. A thorough analysis of various scientific articles in the domain of deep neural networks application in the medical ...field has been conducted. More than 300 research articles were obtained, and after several selection steps, 46 articles were presented in more detail. The results indicate that convolutional neural networks (CNN) are the most widely represented when it comes to deep learning and medical image analysis. Furthermore, based on the findings of this article, it can be noted that the application of deep learning technology is widespread, but the majority of applications are focused on bioinformatics, medical diagnosis and other similar fields.
This work presents Combined Heat and Power (CHP) gas engine factory as one of the possible solutions for cogeneration in the industry which has high values of electrical and total efficiency, and the ...electrical efficiency relatively changes little with the change in power of the plant. The cost‐effectiveness of such a plant is significant to the supply of industrial consumer electricity from the grid, and heat from the factory boiler. A problem in assessing the cost‐effectiveness of using such a plant is that it uses more fuel here than in the case of energy supply from the boiler room factory and electrical distribution networks. In this case, the price of fuel and electricity as well as the level of placement of thermal energy, as shown here, determines the cost‐effectiveness of the plant. The final decision on the application of the CHP plant must be preceded by a careful technical analysis of the plant and energy system as well as a financial analysis of the selected case. Due to errors that occurred in practice, this paper aimed to point out the basic problems in choosing the power and mode of operation of these plants.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
The folowing article considers the process of determining the working temperature of the workpiece in the cutting zone when machining the machine plastic on the lathe. Maintenance of the processing ...temperature of the workpiece in the limits of less than 100 °C is possible with the application and programming of the fuzzy logic controller (FLC) for the required processing conditions.
Programming is established for three inputs and one output and the experimental results refer to generating the value of the acceptable temperature value for the polytetrafluoroethylene (PTFE) processed material, better known as teflon.
Fuzzy logic controller adaptation based on Mamdani rules in this paper is supposed to regulate the number of revolutions of the main CNC machine spindle so that the workpiece temperature could be kept below 100 °C without using a coolant to avoid chemical reactions between the coolant and the base material.
The input parameters for the fuzzy controller are the temperature of the machined material, feed speed and depth of cut and the output is the number of revolutions of the main spindle. Acceptable temperature of the workpiece ranges between ∼20 °C and 100 °C, of the feed speed between 0,05 and 0,089 mm/rev and of depth of cut between 1 and 5 mm.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
This paper analyses the level of knowledge management implementation in organizations and the impact of control variables on knowledge management dimensions. In addition, the importance of knowledge ...management influence on the competitive sustainability of an organization is addressed. The idea of the research is to highlight key factors that affect the effectiveness and efficiency of knowledge management applications in transition conditions. Data for the study were obtained by surveying 520 respondents—managers of all levels from manufacturing enterprises in Serbia. A t-test was conducted in several variations. More precisely, the t-test analysis was conducted on the average assessments of knowledge management dimensions and with specific control variables. The findings indicate that knowledge management dimensions differ in domestic enterprises and foreign enterprises as well as that their impact differs across organizational levels. Financial performance (profitability, sales growth, asset growth, market share, competitive position in a specific industry, productivity, and salaries) was found to be a reliable indicator of knowledge management success. It can be concluded that knowledge management dimensions have an important role in transition countries, and it is evident that effective knowledge management is imperative for the competitive sustainability of an organization.
The need to encourage the use of renewable resources exists in all developed countries. This enables the saving of non-renewable resources, security and independence in energy supply, preservation of ...the environment, increasing the competitiveness of the economy, and socially responsible business. Modern living conditions imply the increasing application of ICT technologies in all spheres of life. The application of sensor stations within smart technologies such as smart cities, smart agriculture, etc. implies the installation of sensor stations in places without infrastructure, which is why batteries with limited capacity are mainly used to power them. This problem can be overcome by using photovoltaic cells to transform solar energy into electricity, which would ensure their energy independence, which would allow their even greater application. In this paper, a study of the possibility of supplying sensor stations with electricity using PV cells was conducted.
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IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
The basis of every hydraulic system is based on energy transformations, which are realized through hydraulic working fluid. Hydraulic oils are certainly subject to changes within their structure, ...meaning the basic characteristics and parameters of hydraulic oil, such as density, viscosity, humidity. The oils that are exploited are exposed to the process of degradation, which largely leads to significantly poorer quality of hydraulic fluid. The paper deals with the influence of changes in the characteristics of the hydraulic fluid on the hydraulic operating parameters of the gear pump installed on the hydraulic press. The parameters refer to pressure, flow, and temperature, as well as the quality of hydraulic oil, which affects the volumetric efficiency of the pump, and the results presented in the conclusion are based on the measured values of parameters before and after corrective measures. The control of parameters aims to increase the efficiency and reliability of the hydraulic system, a way of modern detection of deviations of parameters from standard, required values.
The paper presents a procedure for determining the optimal amount of thermal energy for the profitable operation of a biogas plant. The temperature at which anaerobic fermentation takes place ...shortens the time of fermentation and biogas production, but also the provision of higher temperatures requires a certain amount of thermal energy, whose consumption reduces the energy effects of the biogas production system. In this paper the results of the average outdoor temperature and the temperature of inlet mass in fermenter are shown by months, the thermal energy is calculated so as the heat losses of primary and secondary fermenter, and the total required thermal energy to heat the fermenter by months is determined. The required thermal energy for heating the fermenter is presented in percentages, on average 16 % in relation to the total produced thermal energy. Careful analysis determined that the temperature for most profitable anaerobic fermentation process (mesophilic temperature is 40.5 °C), so that the fermentation rate would be optimal with the use of minimum amount of thermal energy to heat the fermenter.
This paper presents research with the basic goal of establishing the structure of informal computer use among adolescents in the Republic of Serbia, and of verifying the existence of a statistically ...significant correlation between this and their expectations regarding the implementation of ICT in the teaching process. This research was conducted by examining the opinions of 14–18 year-old adolescents regarding their computer use, Internet and social networks, and their expectations related to ICT in teaching. The results were obtained from 318 questionnaires consisting of 32 questions distributed among a representative, focused sample of adolescents: seventh and eighth grade primary, grammar and high school pupils in the Republic of Serbia. The research was carried out during the 2013/2014 school year. Data processing included a descriptive and correlative analysis which showed that Serbian adolescents are very active when it comes to informal computer use, and that there is a statistically significant correlation between the dimensions of computer use among adolescents and their expectations regarding ICT in teaching. The obtained results provide a foundation for the prediction of educational strategies regarding mandatory ICT integration in teaching courses, and the implementation of ICT in realizing teaching content.
•Basic goal was establishing the structure of informal computer use among adolescents.•We examined adolescent's expectations regarding ICT use in the teaching.•Participants were recruited from primary, vocational and grammar schools in Serbia.•Data processing included a descriptive and correlative analysis.•ICT usage has an influence on expectations regarding ICT use in teaching.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Achieving sustainable development requires strategic efforts involving the entire organization. Maintenance efforts also play an important role. Company management needs to understand and develop an ...appropriate strategy to achieve sustainable development by applying maintenance performance measurements. The aim of this paper is to present possible ways of analyzing and ranking the impact of certain criteria with respect to achieving sustainability. The paper uses the method of Structural Equation Modeling—SEM in order to determine the most influential variable on the sustainability of maintenance of technical systems. Based on the set theoretical system model, for all its variables in the model, statements were made that describe them, on which 136 respondents gave their views (from 1 to 5, Likert scale) in the territory of the Republic of Serbia. An intuitive F-DEMATEL method was also used to prioritize variables. A team of 10 experts in the field of maintenance of technical systems was compared the criteria A—Application of technical diagnostics, B—Management of maintenance resources, C—Maintenance process planning, and the dependent variable D—Sustainability of maintenance of technical systems. According to experts, the importance of the criteria coincides with the results obtained by a survey with 136 respondents.
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