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.

Models for Better Environmental Intelligent Management within Water Supply Systems

Abstract: The paper presents models for better environmental intelligent management within water supply systems. The following computer models were developed: supervising parameters (pressure and flow) of water supply network (classification models in the form of neural networks, hybrid neural networks, decision trees and multiple decision trees), forecasting of water supply network load in different intervals of time (prediction models in the form of neural networks and hybrid neural networks), preferences for network operator and consumer in the form of decision rules and decision trees, classification of exceptions, typical examples and preferences for controlling water flow, controlling of pumps in the water supply network in the form of decision and activity rules and controlling of pumps for filling up retention tanks in the form of decision and action rules. These models were compared with a view to obtaining optimal models to control the parameters of water supply networks. The models are embedded in intelligent decision support system with a knowledge acquisition module. The research was done for Municipal Water Supply and Sewage Company in Rzeszow, Poland.

Point defects as a test ground for the local density approximation +U theory: Mn, Fe, and V(Ga) in GaN.

Abstract: Electronic structure of the Mn and Fe ions and of the gallium vacancy V(Ga) in GaN was analysed within the GGA + U approach. First, the +U term was treated as a free parameter, and applied to p(N), d(Mn), and d(Fe). The band gap of GaN is reproduced for U(N) ≈ 4 eV. The electronic structure of defect states was found to be more sensitive to the value of U than that of the bulk states. Both the magnitude and the sign of the U-induced energy shifts of levels depend on occupancies, and thus on the defect charge state. The energy shifts also depend on the hybridization between defect and host states, and thus are different for different level symmetries. In the case of V(Ga), these effects lead to stabilization of spin polarization and the "negative-U(eff)" behavior. The values of Us were also calculated using the linear response approach, which gives U(Fe) ≈ U(Mn) ≈ 4 eV. This reproduces well the results of previous hybrid functionals calculations. However, the best agreement with the experimental data is obtained for vanishing or even negative U(Fe) and U(Mn).

Intensity of Health Behaviors in People Who Practice Combat Sports and Martial Arts.

Abstract: Background: Health behaviors are associated with a healthy lifestyle, in which relative possibilities of choice play an important part Athletes are a group of people who should particularly endeavor to have a health-oriented lifestyle It is believed that combat sports (CS) and martial arts (MA) have an especially significant educational potential, connected with several desirable values which provide positive patterns of health behaviors The aim of the work was to assess the intensity of health behaviors in athletes who practiced CS and MA in relation to the length of their training history, their age, sex, place of residence, education level, and financial situation Methods: The research involved 441 men and women who practiced boxing (B), Brazilian ju-jitsu (BJJ), karate (K), mixed martial arts (MMA) and Muay Thai (MT) The average age of the subjects was 2468 ± 824 years The standardized Health Behavior Inventory (HBI) questionnaire and another questionnaire for a lifestyle survey were applied Individual behaviors covered four areas: Correct eating habits (CEH), preventive behaviors (PB), positive mental attitude (PMA), and health practices (HP) The one-way analysis of variance (F-test) for independent groups was used (ANOVA) The effect size was calculated with Hedge's g for Student's t-test, and with Cramer's V for the χ2 test The value of p ≤ 005 was assumed to be statistically significant Results: CS and MA athletes presented a moderate level of health behaviors The greater intensity of health behaviors (HBI and its categories) was found among B, K and MMA athletes, and the smaller among those who practiced MT Correct eating habits (CEH) were characteristic of subjects who practiced every day and whose length of training history was 4-8 years Greater intensity of preventive behaviors (PB) was observed among individuals aged under-19 years, who still studied Greater intensity of health practices (HP) was found among those who exercised every day Influence of financial situation was observed in relations to PMA Conclusions: It seems that the existing educational potential of CS and MA was not fully realized in the studied population Determining the place of health in the system of values of CS and MA athletes may be the basis for predicting health behaviors and developing health education programs

Topological structure of solution sets for impulsive differential inclusions in Fréchet spaces

Abstract: In this paper, we consider the existence of solutions as well as the topological and geometric structure of solution sets for first-order impulsive differential inclusions in some Frechet spaces. Both the initial and terminal problems are considered. Using ingredients from topology and homology, the topological structures of solution sets (closedness and compactness) as well as some geometric properties (contractibility, acyclicity, A R and R δ ) are investigated. Some of our existence results are obtained via the method of taking the inverse system limit on noncompact intervals.