The Influence of the Addition of Basalt Powder on the Properties of Foamed Geopolymers.

Geopolymers are binder materials that are produced by a chemical reaction between silica or aluminum compounds with an alkaline activating solution. Foamed geopolymer materials are increasingly being cited as a viable alternative to popular organic insulation materials. Since the foaming process of geopolymers is difficult to control, and any achievements in improving the performance of such materials are extremely beneficial, this paper presents the effect of the addition of basalt powder on the properties of foamed geopolymers. This paper presents the results of physicochemical studies of fly ash and basalt, as well as mechanical properties, thermal properties, and structure analysis of the finished foams. The scope of the tests included density tests, compressive strength tests, tests of the thermal conductivity coefficient using a plating apparatus, as well as microstructure tests through observations using light and scanning microscopy. Ground basalt was introduced in amounts ranging from 0 to 20% by mass. It was observed that the addition of basalt powder contributes to a reduction in and spheroidization of pores, which directly affect the density and pore morphology of the materials tested. The highest density of 357.3 kg/m3 was characterized by samples with a 5 wt.% basalt powder addition. Their density was 14% higher than the reference sample without basalt powder addition. Samples with 20 wt.% basalt addition had the lowest density, and the density averaged 307.4 kg/m3. Additionally, for the sample containing 5 wt.% basalt powder, the compressive strength exceeded 1.4 MPa, and the thermal conductivity coefficient was 0.1108 W/m × K. The effect of basalt powder in geopolymer foams can vary depending on many factors, such as its chemical composition, grain size, content, and physical properties. The addition of basalt above 10% causes a decrease in the significant properties of the geopolymer.

Preliminary assessment of the psychometric properties of the Polish version of the Questionnaire to Assess Affective and Cognitive Empathy (QAACE) in Children.

BACKGROUND: This article reports the Polish adaptation of the Questionnaire to Assess Affective and Cognitive Empathy (QAACE) by Zoll and Enz - a multidimensional self-report questionnaire used to measure empathy in children aged 8-14. The QAACE is based on a two-factor cognitive-emotional model of empathy. It has a number of international adaptations and offers a convenient Polish-language tool for use with young children and adolescents. PARTICIPANTS AND PROCEDURE: The sample consisted of 677 children aged 8-13. The survey was conducted on school premises, during classes, by an appropriately prepared researcher. RESULTS: Confirmatory factor analysis revealed a good fitting measurement model representing the original underlying factor structure of the QAACE among Polish children. The reliability of the questionnaire as measured by Cronbach's α and McDonald's ω was good. The reliability of the scale as assessed by the test-retest method (after four weeks) was .80. We assessed the validity of the tool by analyzing the correlation of empathy with love and sadism. General empathy, as well as cognitive and affective empathy, is positively related to love. The hypothesis that sadism is significantly related to empathy was also partially confirmed. General empathy and affective empathy are negatively correlated with sadism, while there was no relationship between sadism and cognitive empathy. CONCLUSIONS: The questionnaire is the first widely available tool of this type to examine empathy and its components appropriate for children and adolescents in Poland. The questionnaire can be a useful screening test for detecting children's level of empathy.

Beyond HIV shame: the role of self-forgiveness and acceptance in living with HIV.

Research is developing regarding the beneficial association of spirituality with numerous health outcomes in people living with HIV (PLWH); however, little attention has been paid to the association of these variables with forgiveness and acceptance of HIV status. This cross-sectional study used a sample of 648 PLWH from the United States aged 18-61 to test the mediating effects of forgiveness and acceptance of HIV status on the relationship of spirituality and life satisfaction. As expected, self-forgiveness and acceptance straightforwardly and serially explained the links between spirituality and life satisfaction, while forgiveness of others was not a significant mediator for this relationship. The data obtained suggest that spirituality and self-forgiveness are two important targets for future experimental research, and therapeutic interventions on these variables may have a synergistic effect of increasing acceptance and improving well-being in PLWH.

The mediating effects of anxiety on the relationships between persistent thinking and life satisfaction: A two-wave longitudinal study in patients with anxiety disorders.

OBJECTIVE: According to cognitive theories, anxiety disorders may result from distorted beliefs, sensations, feelings, and decisions, leading to an overestimation of the danger presented by various stimuli. METHODS: In this two-wave longitudinal study of 435 German patients with anxiety disorders, we assessed the association of negative persistent thinking, anxiety, and life satisfaction. RESULTS & CONCLUSION: Structural equation modeling results suggest that persistent thinking may initiate the occurrence of anxiety, which in turn influences a decrease in life satisfaction. The convergence of the evidence from this longitudinal study with earlier results of evidence-based trials fortifies the case supporting the need to identify and reduce cognitive distortions in therapeutic interventions to improve health in people with anxiety disorders.

The Relationship Between Forgiveness and Health Outcomes Among People Living with HIV: A Cross-Sectional Study in France.

Research to date has shown that HIV infection is a highly stressful experience for individuals, and one of the key adaptive resources after such painful experiences may be forgiveness. The aim of the present study was to examine the associations between dispositional forgiveness (assessed using Mullet's Forgivingness Questionnaire and Toussaint's Forgiveness Scale), perceived stress (single-item measure of stress symptoms), health perception (EuroQol visual analogue version of the scale) and life satisfaction (Satisfaction With Life Scale) in people living with HIV (PLWH) in France. Paper surveys were completed by 222 PLWH aged 18-78 (57% male). Multiple regression analysis revealed that sensitivity to circumstances, unconditional forgiveness, self-forgiveness, and forgiveness of others were significant predictors of health and happiness. Mediation analysis showed that these relationships are completely mediated by perceived stress. The present findings suggest that forgiveness and perceived stress may be important variables for healing in PLWH. Interventions designed to improve forgiveness and self-forgiveness may result in improved health and life satisfaction in PLWH.

Positive religious coping acts through perception of nature and silence in its association with well-being and life satisfaction among Polish Catholics.

Previous studies indicate that perceptions of nature and thought-provoking silence can have positive consequences for individual functioning. The purpose of the present study was to assess the relationships between religious coping (assessed with the Brief RCOPE), perceptions of nature and silence (a subscale of the Perception of Change Questionnaire), well-being (the World Health Organization's five-item Well-Being Index) and life satisfaction (the Brief Multidimensional Life Satisfaction Scale). An online questionnaire was completed between 2021-2022 by 1,010 Polish Catholics ages 18 to 73, 61% of whom were women. Structural equation modeling showed that positive religious coping was positively related to well-being (ß = 0.08, p = 0.011) and life satisfaction (ß = 0.22, p < 0.001). In contrast, negative religious coping was related to reduced well-being (ß = -0.07, p = 0.040) and life satisfaction (ß = -0.25). In addition, more frequent perceptions of nature and reflective times of silence partially mediated the associations of positive religious coping with well-being (ß = 0.04, p = 0.011) and life satisfaction (ß = 0.04, p = 0.008). The data might suggest that interventions that help people develop an ability or awareness for nature as an exceptional encounter and may help to strengthen the ways they can utilize their religiosity as a resource and thus contribute to well-being and life satisfaction among Catholics.

3D Printing of Concrete-Geopolymer Hybrids.

In recent years, 3D concrete printing technology has been developing dynamically. Intensive research is still being carried out on the composition of the materials dedicated to innovative 3D printing solutions. Here, for the first time, concrete-geopolymer hybrids produced with 3D printing technology and dedicated environmentally friendly building construction are presented. The concrete-geopolymer hybrids consisting of 95% concrete and 5% geopolymer based on fly ash or metakaolin were compared to standard concrete. Moreover, 3D printed samples were compared with the samples of the same composition but prepared by the conventional method of casting into molds. The phase composition, water leachability, compressive, and flexural strength in the parallel and perpendicular directions to the printing direction, and fire resistance followed by compressive strength were evaluated. Concrete-geopolymer hybrids were shown to contain a lower content of hazardous compounds in leaches than concrete samples. The concentration of toxic metals did not exceed the limit values indicated in the Council Decision 2003/33/EC; therefore, the materials were classified as environmentally neutral. The different forms of Si/Al in fly ash and metakaolin resulted in the various potentials for geopolymerization processes, and finally influenced the densification of the hybrids and the potential for immobilization of toxic elements. Although the compressive strength of concrete was approximately 40% higher for cast samples than for 3D printed ones, for the hybrids, the trend was the opposite. The addition of fly ash to concrete resulted in a 20% higher compressive strength compared to an analogous hybrid containing the addition of metakaolin. The compressive strength was 7-10% higher provided the samples were tested in the parallel direction to the Z-axis of the printout. The sample compressive strength of 24-43 MPa decreased to 8-19 MPa after the fire resistance tests as a result of moisture evaporation, weight loss, thermal deformation, and crack development. Importantly, the residual compressive strength of the hybrid samples was 1.5- to 2- fold higher than the concrete samples. Therefore, it can be concluded that the addition of geopolymer to the concrete improved the fire resistance of the samples.