<abstract xmlns="http://www.w3.org/1999/xhtml"> A failure mode and effects analysis (FMEA) is the most often used (and required by customers) tool for quality planning. The FMEA examines possible errors with their consequences for customers as well as their possible causes. This analysis can be realized on several levels (structure or process), and thus it may become a subject of various teams, from engineers of whole parts to those dealing with individual units, from workers preparing the manufacturing processes as a whole to those who prepare (or control or even perform) individual operations. The aim of this work is the analysis of risks using the FMEA for a selected production process and proposal of measures to eliminate risks.</abstract>

Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Quality and Engineering Technologies, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovak Republic

Slovak University of Agriculture in Nitra, Slovakia

Risk Analysis of Production Process for Automotive and Electrical Engineering Industry using FMEA

<abstract xmlns="http://www.w3.org/1999/xhtml"> This article deals with thermal properties of selected biodiesel and bioethanol samples (biodiesel No 1, No 2 and bioethanol No 1, No 2). Biodiesel is renewable fuel that can be manufactured from vegetable oils, animal fats, or recycled restaurant grease for use in diesel vehicles. Biodiesel‘s physical properties are similar to those of petroleum diesel, but it is a cleaner-burning alternative fuel. Ethanol (CH3CH2OH) is a clear liquid. Also known as ethyl alcohol, grain alcohol, and EtOH, the molecules in this fuel contain a hydroxyl group (OH-) bonded to a carbon atom. Ethanol is made of the same chemical compound regardless of whether it is produced from starch and sugar-based feedstocks, such as corn grain, sugar cane, etc. The hot wire method was used for thermal parameters measurements. The experiment is based on measuring the temperature rise vs. time evaluation of an electrically heated wire embedded in the tested material. Thermal conductivity is derived from the resulting change in temperature over a known time interval. For two samples of biodiesel and two samples of bioethanol, there were determined basic thermophysical parameters - thermal conductivity and thermal diffusivity. Two series of measurements were made for each sample of biodiesel and bioethanol. In the first series, there were measured the thermal conductivity and thermal diffusivity at constant room temperature 20 °C. Every thermophysical parameter was measured 10 times for each sample. The results were statistically processed. In the second series of measurements, there were measured the relations of thermal conductivity and thermal diffusivity to temperature in temperature range 20-29 °C. It was evident from results that all measured dependencies are nonlinear. Polynomial functions described by polynomial coefficients were obtained for both thermophysical parameters. The type of function was selected according to statistical evaluation based on the coefficient of determination for every thermophysical parameter graphical dependency. All obtained results are presented in Figures 1-4 and in Tables 1-4. The results of thermophysical parameters measurements of biodiesel and bioethanol could be compared with the values presented in literature.</abstract>

Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Physics, Tr. A. Hlinku 2, 949 76 Nitra, Slovak Republic

Thermal Conductivity and Thermal Diffusivity of Biodiesel And Bioethanol Samples

<abstract xmlns="http://www.w3.org/1999/xhtml"> In this article, there are compared the types of opening structures in terms of their size and in terms of covering of opening structures with curtains or blinds. Two windows were used in the first case and three windows in the second case. In the third case, the window was divided into three parts, and in the fourth case, the window was divided into three parts covered with curtains. The size of opening structures in the first half of the room, near the windows, has the greatest impact on lighting. In the rear part of the room, the difference is not so great. If the windows are covered with curtains or blinds, the difference in room lighting is significant.</abstract>

Assessing of Daylight Factor Values Depending on Window Opening Structures in Model Room

<abstract xmlns="http://www.w3.org/1999/xhtml"> The welding of alloy steels in practice is a difficult process in order to achieve mechanically or chemically resistant high-quality welds. In some cases, the weldability of many materials can be difficult or is not recommended because of poor and unsuitable properties of welded joints. In our research work, we investigate the selection of an appropriate welding method for welding the manganese steel HS 20 used at dynamically strained components in the car industry. The welding methods have been selected from accessible methods of the KARRER, s.r.o. Tovarníky industrial plant. Based on the comparable welding technologies MMA, MIG/ MAG and TIG, we tested and verified the quality of welds by means of selected weld tests. The quality of these welds, obtained by the abovementioned methods, was evaluated by weld tests in laboratory conditions of the Department of Quality and Engineering Technologies (Slovak University of Agriculture in Nitra) in cooperation with NDB, s.r.o. Bratislava and SES Tlmače, a.s. The aim of the research work is to set the most suitable and effective method of welding for given components from all the technologies available in the mentioned industrial plant. Based on relevant information, we also want to enrich the scope of knowledge about welding of manganese materials in order to make the welding process more effective.</abstract>

Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Quality and Engineering Technologies, Tr. A. Hlinku 2, 949 76 Nitra, Slovak Republic

Assessing the Weld Quality of Manganese Steel

<abstract xmlns="http://www.w3.org/1999/xhtml"> A full factor experiment (FFE33) of transporting bulk materials by a tubular scraper conveyor on a curved track was conducted. There were derived the regression equation dependencies of production and torque on pipe diameter, fill factor and linear velocity. The graphical dependence of production and torque on the above-mentioned factors was constructed, and regression coefficients for different materials were determined.</abstract>

Department of Automated Control of Technological Processes, Faculty of Computer Technologies, Ternopil Ivan Pul‘uj National Technical University, Ruska str., 56, 46000 Ternopil, Ukraine

Ternopil Ivan Pul‘uj National Technical University, Ukraine

Ternopil Volodymyr Hnatyuk National Pedagogical University, Ukraine

Results of Experimental Research of Granular Materials Transportation by Tubular Scraper Conveyors

<abstract xmlns="http://www.w3.org/1999/xhtml"> In the work, there was a method of problems examination presented in the certified quality management system according to the ISO 9001 standard. The own method of problems examination was suggested on the basis of reports from audits of the third party. There are method assumptions as well as practical application presented for the examination of nonconformities and weaknesses on a sample of 892 organizations certified by a chosen certifying body. Different types of compilations of obtained results are showed. Different possibilities of their application for the examination of relations of identified problems were indicated, depending on the size and profile of examined organizations. Different types of statistical tests were used in the method together with their possibilities. Concrete examples of uses of the method and statistical tests were provided for examining the relations between the size as well as profile of the organization and the number as well as type of nonconformities and weaknesses. It was attempted to determine what possibilities the method provides and to give the examples of its practical use. Additionally, an attention was paid to potential difficulties when applying the method.</abstract>

Problems Examination in Quality Management System

AHEAD OF PRINT

Volume 27 (2024): Issue 1 (March 2024)

Volume 26 (2023): Issue 4 (December 2023)

Volume 26 (2023): Issue 3 (September 2023)

Volume 26 (2023): Issue 2 (June 2023)

Volume 26 (2023): Issue 1 (March 2023)

Volume 25 (2022): Issue 4 (December 2022)

Volume 25 (2022): Issue 3 (September 2022)

Volume 25 (2022): Issue 2 (June 2022)

Volume 25 (2022): Issue 1 (March 2022)

Volume 24 (2021): Issue 4 (December 2021)

Volume 24 (2021): Issue 3 (September 2021)

Volume 24 (2021): Issue 2 (June 2021)

Volume 24 (2021): Issue 1 (March 2021)

Volume 23 (2020): Issue 4 (December 2020)

Volume 23 (2020): Issue 3 (September 2020)

Volume 23 (2020): Issue 2 (June 2020)

Volume 23 (2020): Issue 1 (March 2020)

Volume 22 (2019): Issue 4 (December 2019)

Volume 22 (2019): Issue 3 (September 2019)

Volume 22 (2019): Issue 2 (June 2019)

Volume 22 (2019): Issue 1 (March 2019)

Volume 21 (2018): Issue 4 (December 2018)

Volume 21 (2018): Issue 3 (September 2018)

Volume 21 (2018): Issue 2 (June 2018)

Volume 21 (2018): Issue 1 (March 2018)

Volume 20 (2017): Issue 4 (December 2017)

Volume 20 (2017): Issue 3 (September 2017)

Volume 20 (2017): Issue 2 (June 2017)

Volume 20 (2017): Issue 1 (March 2017)

Volume 19 (2016): Issue 4 (December 2016)

Volume 19 (2016): Issue 3 (September 2016)

Volume 19 (2016): Issue 2 (June 2016)

Volume 19 (2016): Issue 1 (March 2016)

Volume 18 (2015): Issue 4 (December 2015)

Volume 18 (2015): Issue 3 (September 2015)

Volume 18 (2015): Issue 2 (June 2015)

Volume 18 (2015): Issue 1 (March 2015)

Volume 17 (2014): Issue 4 (December 2014)

Volume 17 (2014): Issue 3 (September 2014)

Volume 17 (2014): Issue 2 (June 2014)

Volume 17 (2014): Issue 1 (March 2014)

Volume 16 (2013): Issue 4 (December 2013)

Volume 16 (2013): Issue 3 (September 2013)

Volume 16 (2013): Issue 2 (June 2013)

Volume 16 (2013): Issue 1 (March 2013)

Acta Technologica Agriculturae

 Acta Technologica Agriculturae (ATA) is an international scientific journal focused on agricultural engineering. The journal is multidisciplinary and publishes a wide range of original research and review articles in engineering, agricultural and biological sciences, and materials science. All submitted articles considered suitable for ATA are subjected to rigorous double-blind peer review to ensure the highest levels of quality.  The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas and encourages submissions which contribute novel and innovative insights to the field of agricultural engineering. Original papers which provide an important contribution to the development of agricultural engineering and report on significant developments in the field are encouraged.  Aims and Scope  ATA aims to advance the understanding of agricultural engineering by providing a platform for the publication of unique contributions in the field of agricultural engineering across a variety of topics, including, but not limited to:   agricultural and biosystems engineering;  machines and mechanization of agricultural production;  information and electrical technologies;  agro-product and food processing engineering;  physical, chemical and biological changes in the soil caused by tillage and field traffic, soil working machinery and terramechanics;  renewable energy sources and bioenergy;  rural buildings;  agricultural waste management and disposal;  related issues from applied physics and chemistry, ecology, economy and energy.    Rejection Rate   40 %   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 