The aim of this research was to compare the level of digital competence of future pedagogical staff (students of pedagogical faculties) in Italy and Poland. The research was conducted using original measurement tools and knowledge tests. The triangulation of techniques and research tools made possible the determination of the level of knowledge of the positive and negative features of the development of the information society, as well as the proficiency and frequency of use of the most popular websites and software. The research was conducted in the first half of 2022 using stratified sampling in both countries (N = 1209, IT = 604, PL = 605). Based on the data collected, it was noted that: (1) Pre-service teachers most often use software such as word processors and presentation creation tools; (2) This group very rarely uses software to create web pages, create visual material, or edit video; (3) The least problematic software that students use are word processors and multimedia presentations; (4) Among the typical ICT mediated activities that cause problems are: searching for and installing freeware (PL), installing and configuring parental control software (PL, IT), creating websites (PL, IT), searching for freely licensed images, and identifying plagiarism (PL); (5) Polish students have more theoretical knowledge about e-risks and the possibilities of the digital world than their Italian counterparts; (6) In most domains, the Italian future teachers rate their competences higher; (7) 53.81% of the respondents in IT and 38.68% in PL received lower results in competence tests, and handling ICT in selected areas causes problems for these students; (8) Both in PL and IT the frequency of ICT use and its seamless integration are predictors for assessing the effectiveness of ICT use in education.
The study investigates the impact of pore structure parameters of three chemically non-active filtration materials on the auto-activation time and the height of the filtration zone for manganese removal from groundwater. At a technical scale, the activation is a long process which may require a period of up to three months. The process can be shortened by the use of porous filtration materials. In this study, three filtration materials (silica sand, chalcedonite sand, GAC—granulated activated carbon) were investigated using subcritical nitrogen adsorption and mercury injection capillary pressure measurements. These methods provide a comprehensive evaluation of pore structure parameters, including specific surface area (SSA), micro- and mesopore volumes, and an extended range of pore size distribution (PSD). The studied materials provided a wide range of micro- and mesopore volumes as well as SSA. In order to investigate the auto-activation time of filtration material—the time required to achieve the requested quality of the filtrate—and the height of the filtration zone, a pilot experiment was conducted for 1950 h. The pilot installation consisted of three-meters-high (10 cm diameter) filtration columns filled with the tested filtration materials. The results indicate that the internal pore structure and the investigated auto-activation parameters are correlated. Both auto-activation time and the size of the filtration zone were influenced by the mesopore volume and the associated SSA of the tested materials. The micropore volume was less effective in improving the autoactivation parameters. The research results indicated the importance of pore structure characteristics which should be considered prior to time-consuming pilot and technological tests.
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