Kazimierz Wielki University in Bydgoszcz

About: Kazimierz Wielki University in Bydgoszcz is a education organization based out in Bydgoszcz, Poland. It is known for research contribution in the topics: Population & Luminescence. The organization has 1109 authors who have published 2923 publications receiving 19548 citations. The organization is also known as: Casimir the Great University & Uniwersytet Kazimierza Wielkiego w Bydgoszczy.

Concurrent validity and reliability of proprietary and open-source jump mat systems for the assessment of vertical jumps in sport sciences.

Abstract: PURPOSE Vertical jump tests are used to assess lower-limb power of athletes in sport sciences. Flight time measurement with jump-mat systems is the most common procedure for this purpose. The aim of this study was to analyze the concurrent validity and reliability of two proprietary systems (Globus and Axon) and an open-source system (Chronojump). METHODS A conditioning electric circuit governed by a controlled wave generator is designed to substitute athletes jumping on a physical mat. In order to look for possible differences associated to timekeeping by each microcontroller device, all three systems are fed by the circuit simultaneously. RESULTS Concurrent validity was high for the three systems. Standarized typical error of estimate (TEE) was trivial, according to MBI interpretation as well as perfect Pearson correlation coefficient. Reliability was assessed based on the coefficient of variation of flight time measure, resulting in 0.17-0.63% (0.05-0.12 cm) for Globus, 0.01% (0.09 cm) for Chronojump and 5.65-9.38% (2.15-3.53 cm) for Axon. These results show that all jump-mat system produced nearly identical measures of flight time so they can be considered valid and reliable for practical purposes. In comparison, Chronojump showed the best performance whereas Axon showed enough variability and disagreement to pose a problem in testing elite athletes. CONCLUSIONS These experiments show that open-source jump mats are as valid and reliable as their proprietary counterparts at a lower cost. Therefore, practitioners can be confident in using Globus or Chronojump systems to test athletes' jump height because of their negligible errors and Axon system to monitor general population.

New proposed implementation of ABC method to optimization of Water Capsule Flight

Abstract: The physical model of Water Capsule Flight is relatively simple but analytically unsolvable. The input data includes the mass of the capsule, velocity, altitude, aerodynamic coefficients of the capsule, and horizontal and vertical winds. The ABC optimization is focused on those attributes. This article is a part of the series dedicated to Inspired by Nature Methods of AI and their implementation in the mechatronic systems. A bag filled with water is an excellent source of explosion-produced water spray which can be used for extinguishing large fires or for other purposes. The paper presents theoretical models of flight of a bag filled with water, dropped from an aircraft moving horizontally. Results of numerical computations based on this model are compared with results of measurements for the trajectory of a bag dropped from a helicopter. A description of the experimental and numerical setup for this experiment are also discussed.

Estimation of fungal contamination and mycotoxin production at workplaces in composting plants, tanneries, archives and libraries

Abstract: The aim of this research was to estimate fungal contamination at workplaces in composting plants, tanneries, libraries and archives. The influence of raw material processed or stored at these workplaces (compost, leather, cellulose) on the toxigenicity and cytotoxicity of fungi was also investigated. Qualitative and quantitative mycological analysis confirmed a high contamination in composting plants and tanneries, while materials in archives and libraries were less contaminated. Among the 74 fungal species present in the studied work environments, 15 species were identified as useful indicators of microbial contamination based on their presence at the workplace, frequency of occurrence and harmfulness to health. For nine Aspergillus and Penicillium isolates, identification was confirmed on the basis of molecular techniques, i.e. internal transcribed spacer region and β-tubulin gene sequencing, and the obtained nucleotide sequences were deposited into the NCBI GenBank Database. Five strains were cytotoxic...