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: Luminescence & Population. 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.

Movement Coordination: Factor Structure of Development in 5th-7th Grade Girls

Abstract: The study objective is to determine the structure of coordination abilities development in 5th-7th grade girls. Materials and methods. The participants in the study were 5th grade girls (n = 20), 6th grade girls (n = 23), 7th grade girls (n = 19). The study used the following methods: analysis and collation of scientific and methodological literature, general scientific methods of theoretical level, such as analogy, analysis, synthesis, abstraction, induction, as well as general scientific methods of empirical level: observation, testing, experiment. To evaluate motor preparedness, the study recorded the results of motor tests, body height and weight. The IBM SPSS 20 statistical analysis software was used to process the study materials. A factor analysis was performed, for which the study used principal component analysis with the rotation method: Variamax with Kaiser Normalization. Results. The analysis of similarities shows that the most informative tests in the structure of motor preparedness of the 5th grade girls are the following: test 11 “Evaluation of the ability for vestibular (statokinetic) stability. Running with turns” (.884), test 9 “Static equilibrium evaluation by E. Ya. Bondarevsky’s method” (.826), test 6 “Evaluation of the sense of movement speed in sprinting” (.824); of the 6th grade girls — test 11 “Evaluation of the ability for vestibular (statokinetic) stability. Running with turns” (0.884), test 9 “Static equilibrium evaluation by E. Ya. Bondarevsky’s method” (.826), test 6 “Evaluation of the sense of movement speed in sprinting” (.824); of the 7th grade girls — test 8 “Evaluation of the ability to differentiate movement speed (reproduction accuracy of running speed at 90% intensity of maximum)” (.902), test 11 “Evaluation of the ability for vestibular (statokinetic) stability. Running with turns” (.900), test 1 “30 m running (s)” (.869). Conclusions. In the structure of coordination abilities of the 5th-7th grade girls, the most informative components are the sense and differentiation of running speed, vestibular stability in exercises that require static and dynamic equilibrium. To carry out pedagogical control of coordination preparedness of 5th-7th grade girls, the study recommends using the following tests: test 11 “Evaluation of the ability for vestibular (statokinetic) stability. Running with turns”, test 9 “Static equilibrium evaluation by E. Ya. Bondarevsky’s method”, test 6 “Evaluation of the sense of movement speed in sprinting”.

Geographical differentiation of Dryas octopetala in Europe based on morphological features.

Abstract: Dryas octopetala is an important arctic alpine species, but its morphological analyses are scarce. The study deals with present European biogeographical structure based on morphology and its relations to the phylogenetic structure and the climate. Characters of leaves from 23 isolated populations were meas- ured, statistically characterized and analyzed with the use of ANOVA and the discriminant analysis. All the features differentiated the tested samples significantly. Differences between plants representing regions were greater than between the samples within regions with regard to the four characters. The most visible division ran between the samples coming from the southern and the northern parts of the range, with the sample from the Western Scandinavia occupying the central position. Correlations between characters and climactic factors were shown, and the size of the leaf was associated mainly with the minimum tem- peratures of spring months, while the leaf shape with the rainfall during the summer months. Characters differentiating the regions and discriminating populations strongly were mostly dependent on the influence of the climate. The results of the present study were not fully consistent with the outcomes of the biogeo- graphic molecular analyses of the researched species. Some parallels can be drawn when comparing the present analyses with the geographic differentiation of two other arctic-alpine shrubs Salix herbacea and S. reticulata. Although morphological diversity of Dryas octopetala showed a geographic structure, it was most probably shaped mainly by the influence of the environmental and climatic factors.

Death Zone Weather Extremes Mountaineers Have Experienced in Successful Ascents.

Abstract: (1) Background: Few data are available on mountaineers’ survival prospects in extreme weather above 8000 m (the Death Zone). We aimed to assess Death Zone weather extremes experienced in climbing-season ascents of Everest and K2, all winter ascents of 8000 m peaks (8K) in the Himalayas and Karakoram, environmental records of human survival, and weather extremes experienced with and without oxygen support. (2) Material and Methods: We analyzed 528 ascents of 8K peaks: 423 non-winter ascents without supplemental oxygen (Everest–210, K2–213), 76 ascents in winter without oxygen, and 29 in winter with oxygen. We assessed environmental conditions using the ERA5 dataset (1978–2021): barometric pressure (BP), temperature (Temp), wind speed (Wind), wind chill equivalent temperature (WCT), and facial frostbite time (FFT). (3) Results: The most extreme conditions that climbers have experienced with and without supplemental oxygen were: BP 320 hPA (winter Everest) vs 329 hPa (non-winter Everest); Temp –41 °C (winter Everest) vs –45 °C (winter Nanga Parbat); Wind 46 m·s−1 (winter Everest) vs 48 m·s−1 (winter Kangchenjunga). The most extreme combined conditions of BP ≤ 333 hPa, Temp ≤ − 30 °C, Wind ≥ 25 m·s−1, WCT ≤ − 54 °C and FFT ≤ 3 min were encountered in 14 ascents of Everest, two without oxygen (late autumn and winter) and 12 oxygen-supported in winter. The average extreme conditions experienced in ascents with and without oxygen were: BP 326 ± 3 hPA (winter Everest) vs 335 ± 2 hPa (non-winter Everest); Temp – 40 ± 0 °C (winter K2) vs – 38 ± 5 °C (winter low Karakoram 8K peaks); Wind 36 ± 7 m·s−1 (winter Everest) vs 41 ± 9 m·s−1 (winter high Himalayan 8K peaks). (4) Conclusions: 1. The most extreme combined environmental BP, Temp and Wind were experienced in winter and off-season ascents of Everest. 2. Mountaineers using supplemental oxygen endured more extreme conditions than climbers without oxygen. 3. Climbing-season weather extremes in the Death Zone were more severe on Everest than on K2. 4. Extreme wind speed characterized winter ascents of Himalayan peaks, but severely low temperatures marked winter climbs in Karakoram.

Hepatitis E virus in wild boar in northwest Poland: sensitivity of methods of detection.

Abstract: In northwest Poland, 163 blood and 53 fecal samples of wild boars were collected in winter 2012/13 and 2013/14. All blood samples were tested for the presence of hepatitis E virus (HEV) ribonucleic acid (RNA) by two reverse transcription-polymerase chain reaction (RT-PCR) based methods and by anti-HEV IgG enzyme-linked immunosorbent assay (ELISA). About 17.2% of blood samples were seropositive. One-step nested RT-PCR turned out to be too insensitive (11.6% were positive). Therefore a two-step nested RT-PCR was applied where 25.8% of the blood samples were tested positive for HEV RNA. About 50.0% of blood samples positive in ELISA were also positive in two-step nested RT-PCR. The prevalence of HEV RNA in feces was 9.4%. Based on the results of blood (ELISA, PCR) and fecal (PCR) tests, the overall prevalence of HEV in wild boars in northwest Poland was 36.8%. There was no correlation between the ELISA results and the presence of HEV RNA in plasma or in feces. According to the sequencing results of 348 bp PCR products of HEV, there were four different subtypes identified. Reports on the prevalence of HEV in wild boar populations are varying due to different sensitivities of the detection methods. However, this study reveals based on a highly sensitive method that HEV is widely spread in wild boar populations in the northwestern region of Poland and posing a potential risk to the consumer of game meat.