Abstract:In the implementation of specialized services a large attention is paid to the flow of information between cells which determine the proper execution of the task. In engineering services related to dentistry there appears to be a significant discrepancy connected with knowledge awareness. The article presents three areas of knowledge (in the range and possession of the required knowledge) and information flow between the patient, dentist and dental technician. A technical solution to increase the possibilities of obtaining information at the design stage of the restoration has also been proposed, by introducing a system of material selection and engineering techniques in dentistry.
Abstract:In this study, the work of the dentist and the identification of musculoskeletal disorders have been characterized. The analysis and compatibility with literature on the identification of musculoskeletal disorders resulting from professional work of dentists have been presented. The authors assessed the occupational risks associated with static load on the position of the dentist by means of the OWAS method.
Abstract:The determination of the material fatigue limit is important with regard to the determination of safe service life of structural materials. Depending on the type of treatment and the type and size of introduced stresses, technological procedures can affect negatively or positively the fatigue properties of steel. Based on literature research and our own research, the article presents the influence of selected technological factors on fatigue properties. Our own studies were performed with the use of load high frequencies of 20 kHz in the ultra-high-cyclic area.
Abstract:Project planning is an especially important and difficult part of a project preparation. Errors made at these stages usually cause accumulation of difficulties in the implementation phase, causing for example the need to introduce a number of changes in the schedule or the budget, and may even lead to the failure of the project. This article attempts to outline the characteristics of a selected quality management tool used in the project planning phase. The Product Flow Diagram was presented as one of the elements of product-based planning on the example of a project on developing a prototype system for identifying people.
Abstract:Changes in technology, availability of video casts and the general increase of information and knowledge value result in the advent of educational technology. As the first step toward validation of the effectiveness of e-learning in engineering education, a research on a group of students was carried out. The open-source and free software educational platform Moodle was used to conduct a selected course in the form of blended e-learning. The course was prepared and presented to the students during one semester time period. The effects of learning were verified through knowledge tests and their results were collected for analysis. Students in the test group achieved results equal or even better than other groups, validating the effectiveness of e-learning in engineering education. During the experiment also other positive aspects of e-learning were noted: students appreciated freedom of time and place where they learn and for the teacher high effort connected with course preparation could be rewarded by multiple use of the developed course at a later time.
Abstract:This study presents the findings concerning the effect of remelting on microstructure and selected properties of sintered duplex steel. It was demonstrated that the methods of processing lead to homogenization and elimination of porosity in the surface layer of sinters, which substantially affects their properties (surface roughness, microhardness and resistance to friction wear). It was found that the degree of tribological wear in the steel used in the study depends primarily on the microstructure and phase composition and less on porosity.
Abstract:Super duplex stainless steels present excellent corrosion resistance of austenite steel and a high mechanical behaviour of ferrite steel. However, performance presented by super duplex stainless steels can be drastically reduced if undesirable phases, such as sigma phase, chi phase, secondary austenite and a lot of rich chromium and carbides precipitate. The purpose of this work was to ascertain how 30-minutes isothermal heat treatments at 530°C and corrosion time effect the relative mass loss and profile roughness parameters of the X2CrNiMoN25-7-4 super duplex stainless steel. The influence of boiling nitric acid on the steel corrosion resistance was investigated using weight loss and roughness parameters.
Abstract:The results of the assessment of visual control (VC) types in 10 enterprises from the Silesian province which operate in the automotive industry were presented in this article. These enterprises specialize in production for the automotive industry and constitute companies from Tier 1 and Tier 2 groups in the supply chain. The meaning of visual control was presented in TPS, research methodology and research results. Importance series were used as the basic tool of data analysis. A comparison of importance series was made for the purpose of stating characteristic relations in the scope of importance of the analyses types of VC.
Abstract:The paper discusses and presents a hyperelastic incompressible material described by Zahorski potential. The numerical example comparing effective stresses in a cylinder made of Zahorski and Mooney-Rivlin materials was included. The analysis was made in the ADINA software. Conclusions summarize numerical calculations and demonstrate the differences that suggest the use of Zahorski material for rubber and rubber-like materials subjected to large deformations.