When identifying the conditions required for the sustainable and long-term exploitation of geothermal resources it is very important to assess the dynamics of processes linked to the formation, migration and deposition of particles in geothermal systems. Such particles often cause clogging and damage to the boreholes and source reservoirs. Solid particles: products of corrosion processes, secondary precipitation from geothermal water or particles from the rock formations holding the source reservoir, may settle in the surface installations and lead to clogging of the injection wells. The paper proposes a mathematical model for changes in the absorbance index and the water injection pressure required over time. This was determined from the operating conditions for a model system consisting of a doublet of geothermal wells (extraction and injection well) and using the water occurring in Liassic sandstone structures in the Polish Lowland. Calculations were based on real data and conditions found in the Skierniewice GT-2 source reservoir intake. The main product of secondary mineral precipitation is calcium carbonate in the form of aragonite and calcite. It has been demonstrated that clogging of the active zone causes a particularly high surge in injection pressure during the fi rst 24 hours of pumping. In subsequent hours, pressure increases are close to linear and gradually grow to a level of ~2.2 MPa after 120 hours. The absorbance index decreases at a particularly fast rate during the fi rst six hours (Figure 4). Over the period of time analysed, its value decreases from over 42 to approximately 18 m3/h/MPa after 120 hours from initiation of the injection. These estimated results have been confi rmed in practice by real-life investigation of an injection well. The absorbance index recorded during the hydrodynamic tests decreased to approximately 20 m3/h/MPa after 120 hours.

The present study focused on relationships between personality traits, self-efficacy, self-esteem and basic trust, and well-being in context of entrepreneurial activity. Participants were 301 unemployed people, 157 of whom had received a grant from an employment agency to start their own business. Participants completed measures of personality traits, self-efficacy, self-esteem, basic trust, satisfaction with life, positive and negative affect. To verify if beliefs about the self and about the world mediated relationships between personality traits and well-being we conducted a multiple-sample SEM. The study results confirm that the beliefs mediate relationships between personality traits and well-being. They also show that different types of beliefs serve a different function, depending on an individual’s circumstances. Among grant acceptors, self-efficacy did not impact well-being, while self-esteem and basic trust had similar functions in both groups.

The purpose of this article is to present a new bell type water well construction with circulating treatment and its application. The construction of the water well has been developed and research has been conducted using physical and electrical modelling as well as in the practical field. Researches in this work are of analytical and experimental character. As the results of the research, optimal physical parameters of the constructions have been found and analytical  empirical formulae have been derived to calculate hydraulic parameters. Recommendation for application has been presented. The results received in this work can be used for the application of well construction. Further research is required to improve the physical and the hydraulic parameters of the proposed construction. The work has scientific and practical interest.

This paper describes the results of a study that examined if psychological entitlement and hedonic well-being mediated relationships between counterproductive work behaviors (CWB) and grandiose narcissism. More specifically, the mediation effects of both types of narcissism on CWB via psychological entitlement and hedonistic subjective well-being (SWB) were examined. This study is based on self-reported, cross-sectional study on 119 working adults. Agentic and communal narcissism were positively related to CWB in parallel way, while simultaneously and indirectly decreasing CWB levels via higher SWB. Current paper is the first attempt to include agentic-communal narcissism model to explain the levels of CWB. The theoretical and practical implications of presented findings are discussed here in terms of the agency-communion model of narcissism and the “mixed blessing” effects of grandiose narcissism on subjective well-being.

In integrated approaches to personality (McAdams & Pals, 2006; McCrae & Costa, 1999), it is possible to examine relationships between personality traits, beliefs as characteristic adaptations, and subjective well-being. This research aimed to verify if implicit self-theories (belief about stability of human nature) proposed by Dweck (2000) and life-engagement proposed by Scheier et al. (2006) play a mediating role in relationships between personality traits and satisfaction with life. The relationships were examined with respect to infertility problem. A sample of 120 adults (aged 26–48; M = 36.60; SD = 4.82; 50% women) participated in the research. The mediation hypotheses were examined, and furthermore, four groups of couples were compared in terms of measured variables. The groups were: couples with (1) cured and (2) uncured infertility and couples who were not infertile and (3) have and (4) do not have children. Life-engagement mediated the relationship between Conscientiousness and satisfaction with life in the whole sample. The belief about stability of human nature mediated relationships between subjective well-being and Conscientiousness, Agreeableness, Neuroticism, and Extraversion only among couples with an infertility problem.

Participants in the study were recreational runners who completed measures of their orientation to exercise, the Five Factor Model of personality, self-efficacy as a specific adaptation (a socio-cognitive construct of personality) and measures of subjective well-being (life satisfaction) and eudaimonic well-being (life engagement). Consistent with previous research, task-oriented (internally focused) motivation to exercise was positively related to extraversion and to conscientiousness, and ego-oriented (externally focused) motivation was positively related to extraversion. Also consistent with previous research, self-efficacy and measures of well-being were positively related to extraversion and conscientiousness. Mediational analyses found that well-being mediated relationships between task-oriented motives and both extraversion and conscientiousness. Self-efficacy mediated the relationship between ego-oriented motives and extraversion. The implications of these results for the study individual differences in exercise motivation are discussed.

Uranium concentrations in groundwater taken from private drilled wells have been never determined in Poland, implying a lack of available data to quantify the human exposure to U through drinking water consumption, especially in rural areas influenced by mining activities. The main aim of the study was the assessment of human health risk related to the consumption of well waters containing U, collected from selected rural areas of the Lower Silesian region (Poland). The random daytime (RDT) sampling method was applied to the collection of well waters from three control study areas (CSA): Mniszków (CSA-A), Stara Kamienica/M. Kamienica/Kopaniec (CSA-B) and Kletno (CSA-C). The analyses of RDT samples were performed by validated method based on inductively coupled plasma mass spectrometry (ICP-MS). Uranium concentration ranges in well waters and the estimated geometric means for individual control study areas were: 0.005-1.03 μg/L and 0.052 μg/L (CSA-A), 0.027-10.6 μg/L and 0.40 μg/L (CSA-B), and 0.006-27.1 μg/L and 0.38 μg/L (CSA-C). The average and individual chronic daily intakes (CDI) of U by drinking water pathway (adults/children) were in the ranges of: 0.0017-0.013/0.0052-0.040 μg · kg-1 · day-1 and 0.0002-0.90/0.0005-2.71 μg · kg-1 · day-1. The average %TDI and ranges of individual %TDI (adults/children) were: 0.17%/0.52% and 0.02-3.4%/0.05-10.3% (CSA-A), 1.3%/4.0% and 0.09-35%/0.27-106% (CSA-B), and 1.3%/3.8% and 0.02-90%/0.06-271% (CSA-C). The estimated average CDI values of U through well water are significantly lower than the TDI (1 μg · kg-1 · day-1), while for individual CDI values the contribution to the TDI can reach even 90% (adults) and 271% (children), indicating essential human health risk for children consuming well water from private drilled wells located in CSA-B and CSA-C (5.3% of total number of samples collected).

The research was conducted at the Kwiatków site,1 in the Koło Basin (Central Poland). It included a fragment of a low terrace and the valley floor of the Warta river valley. The archaeological investigation documented over 100 wells that archaeological material indicates are associated with the Przeworsk culture. Geomorphological, lithological and geochemical studies were carried out at the archaeological sites and their surroundings. Selected for the presentation were two wells whose fillings were carefully tested and subjected to geochemical and lithological analyses. The wells showed a slightly different content of artifacts, as well as differences in their grain-size distributions, the structure of their filling deposits, and their geochemistry. This allows us to conclude that the two wells were used differently, but also probably about a different course for how each well was filled after the end of its operation.