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(1) Background: The study was aimed at a better understanding of the factors determining making a decision to become a potential bone marrow donor, in a Polish research sample; (2) Methods: The data was collected using a self-report questionnaire among persons who voluntarily participated in the study concerning donation, conducted on a sample of the Polish population via Internet. The study included 533 respondents (345 females and 188 males), aged 18–49. Relationships between the decision about registration as potential bone marrow donor and psycho-socio-demographic factors were estimated using the machine learning methods (binary logistic regression and classification & regression tree); (3) Results. The applied methods coherently emphasized the crucial role of personal experiences in making the decision about willingness for potential donation, f.e. familiarity with the potential donor. They also indicated religious issues and negative health state assessment as main decision-making destimulators; (4) Conclusions. The results of the study may contribute to an increase in the effectiveness of recruitment actions by more precise personalization of popularizing-recruitment actions addressed to the potential donors. It was found that selected machine learning methods are interesting set of analyses, increasing the prognostic accuracy and quality of the proposed model.

Based on the concepts of Pargament’s adaptational functions of religiosity, Huber’s centrality of religiosity, and Block’s conceptualisation of ego-resiliency as psychosocial resources, a nonexperimental, moderated mediation project was designed for a group of 175 women and 57 men who voluntarily participated in an online study to determine whether and to what extent religiosity mediated or moderated the relationship between ego-resiliency and the severity of PTSD and depression during the COVID-19 epidemic. The analyses carried out showed that the studied variables, ego-resiliency and centrality of religiosity, were predictors of the intensity of some psychopathological reactions caused by the COVID-19 pandemic but were not connected via a mediation relationship. Therefore, one question remains open: what is the role of ego-resiliency and the nature of the stated immunogenic effect of the centrality of religiosity in dealing with the critical threat to mental health that is the COVID-19 pandemic?

The innovative Eye Movement Modelling Examples (EMMEs) method can be used in medicine as an educational training tool for the assessment and verification of students and professionals. Our work was intended to analyse the possibility of using eye tracking tools to verify the skills and training of people engaged in laboratory medicine on the example of parasitological diagnostics. Professionally active laboratory diagnosticians working in a multi-profile laboratory (non-parasitological) (n = 16), laboratory diagnosticians no longer working in this profession (n = 10), and medical analyst students (n = 56), participated in the study. The studied group analysed microscopic images of parasitological preparations made with the cellSens Dimension Software (Olympus) system. Eye activity parameters were obtained using a stationary, video-based eye tracker Tobii TX300 which has a 3-ms temporal resolution. Eye movement activity parameters were analysed along with time parameters. The results of our studies have shown that the eye tracking method is a valuable tool for the analysis of parasitological preparations. Detailed quantitative and qualitative analysis confirmed that the EMMEs method may facilitate learning of the correct microscopic image scanning path. The analysis of the results of our studies allows us to conclude that the EMMEs method may be a valuable tool in the preparation of teaching materials in virtual microscopy. These teaching materials generated with the use of eye tracking, prepared by experienced professionals in the field of laboratory medicine, can be used during various training, simulations and courses in medical parasitology and contribute to the verification of education results, professional skills, and elimination of errors in parasitological diagnostics.

Nursing graduates are required to have both excellent theoretical and practical skills that should be used during stressful emergency interventions. Since the received knowledge should be practiced to gain skills and trained to achieve competences, simulation exercises can be beneficial to even reduce the stress that each individual may face during emergency management of patients. A total of 146 first-year nursing students participated in the study, including 124 women and 22 men aged between 19 and 50 years, with a mean age of 32 years. The objective method estimated psychophysiological parameters (serum cortisol). Objective and subjective methods were used. The subjective method assessed stress experienced by students based on the standardized Stress Appraisal Questionnaire Version B for dispositional assessment. The study was conducted in the Monoprofile Medical Simulation Centre at the University of Economics and Innovation in Lublin, Poland and was approved by the University Research Ethics Committee. Both participants under and over 25 years of age showed increased levels of stress after low and high-fidelity simulations, with statistically significantly higher stress levels found for the low fidelity method. Low-fidelity simulation methods generated a greater increase in cortisol levels, indicating a higher stress level than the high-fidelity methods. The analysis of the scores obtained in the Stress Appraisal Questionnaire (KOS-B) showed that higher cortisol levels after the low-fidelity simulation reduced the subjective perception of a threat, while higher cortisol levels before the high-fidelity simulation promoted higher intellectual activity among the students. Levels of stress in the education of nursing students using low and high-fidelity methods can limit the sense of threat and activate professional task performance. The use of low and high-fidelity simulation does not generate destructive stress levels.

Measurements for determining the effect of chemically enhanced primary treatment (CEPT) on the efficiency of pollutant removal from wastewater were carried out using conventional inorganic coagulants PIX113 with polymer A110 (Kemipol, Police, Poland) and unconventional cationic organic coagulants Cofloc (Attana, Coalville, UK) C29510 (Kemipol, Police, Poland) and Sedifloc 575 (3F Chimica, Sandrigo, Italy). The average removal efficiency in the 2-hour sedimentation process was 46%, 34%, 8%, 12% for the total suspended solids, organic matter (COD), total nitrogen, and total phosphorus, respectively. The use of organic coagulants contributed to 14&ndash, 81% increase of pollutant removal efficiency. Substantial discrepancies in biological nutrient removal processes were not discovered in two-phase (anaerobic-anoxic) experiments without and with the addition of the organic coagulants. The increase in organic matter removal efficiency as a result of the CEPT process may contribute to a 65&ndash, 80% increase in biogas production. The conducted research confirms the possibility of using organic coagulants in the primary precipitation process in wastewater treatment plants (WWTPs) in accordance with the principles of maximum energy recovery, thereby promoting renewable energy sources. Additionally, organic coagulants, as opposed to inorganic ones, do not cause a significant increase of chloride and sulfate ion concentrations, which facilitates the use of treated wastewater in the water reuse systems, such as irrigation of agricultural crops.

Based on the concepts of Huber’s centrality of religiosity as psychosocial resource, a non-experimental, moderated mediation project was designed in a group of 176 women and 84 men, who voluntarily participated in an online study, analysing the relationship between the prayer and the fears (for health, economy/finances, social life and family relations) during the COVID-19 pandemic. Multiple regression analysis was used to determine the general tendency in dependencies between variables. Among the assessed components of religiousness crucial for alleviating the fears of the COVID-19 pandemic, two forms of prayer—Private Practice and Public Practice—turned out to be the most important. Private Practice seemed to appease the fears of threats to family and social relationships of persons assessed, while Public Practice was revealed as the predictor of intensifying of the general, summed up level of fears. The areas of health (illness threat) and financial security fears were not associated neither with prayer nor any other components of religiousness. It means a selective predictive associating of prayer with the appeasing of only specific types of fears, namely those of a social nature. The results obtained point to the importance of the addressed topic in the context of searching for psycho resources in coping with difficult situations and determining their impact.

Based on Huber’s centrality of religiosity concept, a non-experimental research project was designed in a group of 178 women and 72 men, voluntary participants in online studies, quarantined at home during the first weeks (the first wave) of the pandemic, to determine whether and to what extent religiosity, understood as a multidimensional construct, was a predictor of the worsening of PTSD and depression symptoms in the conditions of the COVID-19 pandemic. The study made use of CRS Huber’s scale to study the centrality of religiosity, Spitzer’s PHQ-9 to determine the severity of depression, and Weiss and Marmar’s IES-R to measure the symptoms of PTSD. Our study, which provided interesting and non-obvious insights into the relationship between the studied variables, did not fully explain the protective nature of religiosity in dealing with pandemic stress. Out of five components of religiosity understood in accordance with Huber’s concept (interest in religious issues, religious beliefs, prayer, religious experience, and cult), two turned out to contribute to modifications in the severity of psychopathological reactions of the respondents to stress caused by the pandemic during its first wave. A protective role was played by prayer, which inhibited the worsening of PTSD symptoms, whereas religious experience aggravated them. This means that in order to interpret the effect of religiosity on the mental functioning of the respondents in a time of crisis (the COVID-19 pandemic), we should not try to explain this effect in a simple and linear way, because religious life may not only bring security and solace, but also be a source of stress and an inner struggle.