The role of life skills in developing an authentic leadership attitude in public health students: a multicenter cross-sectional study in Poland.

BACKGROUND: Decision-making skills are considered crucial life skills that condition proper social functioning within groups (i.e., support authentic leadership skills and increasing one's chances of success and wellbeing in life). Nonetheless, the number of scientific papers addressing the role of life skills in developing authentic leadership skills in public health students is limited. The aim of the present study was to develop a theoretical model to determine the role of selected life skills in developing authentic leadership skills in public health students. METHODS: The study was conducted from January 16 through February 28, 2018. In total, 653 students undertaking in-service training in Master's degree programs qualified for the study, and complete data sets were obtained from 329 students (response rate 50.38%). The data were collected by means of a paper questionnaire. Four research tools were used in the study: The Authentic Leadership Self-Assessment Questionnaire, The Moral Foundations Questionnaire, The General Self-Efficacy Scale, and The Youth Leadership Life Skills Development Scale. RESULTS: Two subgroups were identified among the public health students in the study: 1) the extra life skills training group (N = 113) and 2) the no extra life skills training group (N = 216). Both groups of study participants did not differ significantly in terms of age (M (SD): 25.0 (3.89) vs. 25.0 (3.66); t = 0.068, P = 0.946). On the other hand, clear differences were observed in the case of the respondents' participation in voluntary service. The respondents from the extra life skills training group declared participation in voluntary activities less frequently than the respondents from the second identified group (48.7 vs. 31.9%). CONCLUSIONS: A verified theoretical model showed that course aimed at strengthening authentic leadership competences should be modular, should focus on self-improvement and critical reflection, and should be spread over time to enable and encourage each participant to grow and flourish at their own pace.

[Mechanical pressure dependencies of the concentration boundary layers for polymeric membrane]. / Cisnieniowe zaleznosci grubosci stezeniowych warstw granicznych dla membran polimerowych.

On a basis of the Kedem-Katchalsky formalism, the mathematical model enabling the calculation of mechanical pressure estimation characteristic of the concentration boundary layers thicknesses (delta) in a single-membrane system containing binary solutions was obtained. This model contains transport membrane, solution parameters and volume osmotic flux. These values were determined in a series of independent experiments. Calculated values delta are nonlinearly dependent on mechanical pressure difference for the same concentration of investigated solutions and membrane system configuration. These nonlinearities are an effect of a competition between spontaneously occurring diffusion, convection processes and modification of concentration field by mechanical pressure.

Mathematical model equation of the volume flows through polymeric membrane of heterogeneous non-ionic solutions.

Formalism leading to more general form of the Kedem-Katchalsky equation describing osmotic membrane transport, considering local unhomogenity of solutions called concentration boundary layers and influence of gravitational factor on membrane transport kinetics was presented. In order to test this formalism, osmotic volume flux was calculated, on the basis of experimental membrane transport parameters and aqueous glucose solutions in isothermal conditions. Obtained calculation's results are conformable to adequate experimental results presented in previous paper for flat polymeric membrane used in medicine (Biophys. Chem. 1986, 24, 173).

A model equations for voltage concentration boundary layers effect in a single polymeric membrane electrochemical cell.

The model equation for voltage concentration boundary layers effect (vCBLE) across an isotropic polymeric membrane is presented for cases in which the membrane separates unstirred electrolytic solutions at different concentrations. This model equation for binary electrolyte solutions and cell with a horizontally mounted membrane was tested. The vCBLE as a function of ratio solution concentrations and gravitational configuration was calculated. Calculations were made for the case when on a one side of the membrane aqueous solution of NaCl at steady concentration 10(-3) mol x l(-1) (Cl) was placed and on the other aqueous solutions of NaCl at concentrations from 10(-3) mol x l(-1) to 2.5 x 10(-3) mol x l(-1) (Ch). Their density was greater than NaCl solution's at 10(-3) mol x l(-1). It was shown that voltage concentration boundary layers effect depends on hydrodynamic state of a complex concentration boundary layer-membrane-concentration boundary layer, what is controlled by Rayleigh number and that with a increase of value of this number the type of characteristic is changing v(CBLE) = f(Ch/Cl)RC=const.