| 1. | Lisowski P., Bochenek K., Osial M., Denis P., Gawlicki M., Glinicki M. A., Power ultrasound treatment for a sustainable production of diatomite-containing cement-based materials, Journal of Building Engineering, ISSN: 2352-7102, DOI: 10.1016/j.jobe.2025.114989, Vol.118, No.114989, pp.1-20, 2026 Lisowski P., Bochenek K., Osial M., Denis P., Gawlicki M., Glinicki M. A., Power ultrasound treatment for a sustainable production of diatomite-containing cement-based materials, Journal of Building Engineering, ISSN: 2352-7102, DOI: 10.1016/j.jobe.2025.114989, Vol.118, No.114989, pp.1-20, 2026Abstract:
The paper presents a laboratory investigation into the influence of power ultrasound treatment on the reactivity of diatomite in cement-based materials. Diatomite powder was used as a partial replacement of Portland cement in paste and mortar produced using power ultrasound with acoustic energy up to 61 J. The effects of sonication were evaluated in terms of diatomite pozzolanic reactivity, cement hydration kinetics, mechanical properties, and microstructural features of hardened cement paste and mortar. The sonofragmentation of diatomite particles increased with increasing sonication exposure time. The modified Chappelle test revealed that the sonication of diatomite increased Ca(OH)2 consumption by up to 1984 mg/g. As a result of sonication for 10 min. the best-performing diatomite + cement paste exhibited a considerably increased early compressive and flexural strength, by 180 % and 34 %, respectively, also an increased specific surface area (by 69 %), and reduced substitute setting times (by about 35–40 %). The strength activity index of diatomite increased from 57-65 % to 84–90 % due to sonication, showing its efficiency in improving both the early and late strength of diatomite + cement mortar. Such effectiveness is linked to the sonofragmentation and diatomite particle breakage induced by power ultrasound. Results of the study contribute to the development of sonication-assisted manufacturing of low-carbon cement-based materials Keywords:
Diatomite, Early strength development, Power ultrasound treatment, Portland cement, Pozzolanic activity, Sonofragmentation, Ultrasound mediated particle breakage |  |
| 2. | Prakash Dubey V., Przygucka D., Pawlik M., Kowalewski Z. L., Wood P., Kopeć M., Microstructural studies on early-stage deformation in thin-walled LPBF-manufactured SS316L considering its printing orientation, Materials Today Communications, ISSN: 2352-4928, DOI: 10.1016/j.mtcomm.2025.114531, Vol.50, No.114531, pp.1-8, 2026Prakash Dubey V., Przygucka D., Pawlik M., Kowalewski Z. L., Wood P., Kopeć M., Microstructural studies on early-stage deformation in thin-walled LPBF-manufactured SS316L considering its printing orientation, Materials Today Communications, ISSN: 2352-4928, DOI: 10.1016/j.mtcomm.2025.114531, Vol.50, No.114531, pp.1-8, 2026Abstract:
This study investigates the influence of build orientation on the microstructure and early-stage deformation behaviour of austenitic stainless steel 316 L (SS316L) produced via laser powder bed fusion (LPBF). Three LPBF specimen orientations: horizontal (XY), inclined at 45° (ZX), and vertical (Z) were compared to conventionally produced wrought SS316L. Mechanical testing was conducted under uniaxial tension to fracture and to a controlled axial strain of 1 % to capture the onset of plasticity. Electron backscatter diffraction (EBSD) was performed before and after deformation to quantify grain boundary character, misorientation distribution, and grain morphology evolution. The LPBF material exhibited notable differences in yield strength and strain hardening, with the Z-oriented specimens exhibiting the lowest mechanical performance due to insufficient interlayer bonding and elongated melt pool boundaries aligned with the build direction. In contrast, the XY and ZX orientations showed relatively higher strength and more uniform deformation behaviour. EBSD revealed that early-stage plastic deformation led to the intragranular misorientation accumulation but the degree of it varied significantly with orientation. Wrought SS316L displayed the highest overall mechanical properties and more homogeneous deformation due to its equiaxed, recrystallized microstructure. Keywords:
Stainless steel, Microstructure, Additive manufacturing, Laser Powder Bed Fusion Melting (LPBF-M) |  |
| 3. | Kleiber M., Wirtualna niesmiertelność, NAUKA, ISSN: 1231-8515, DOI: 10.24425nauka.20025.156374, Vol.2025, No.3, pp.123-126, 2026Kleiber M., Wirtualna niesmiertelność, NAUKA, ISSN: 1231-8515, DOI: 10.24425nauka.20025.156374, Vol.2025, No.3, pp.123-126, 2026Abstract:
Sztuczna inteligencja potrafi zapewniać nam wirtualną nieśmiertelność, ale budzi też związane z tym olbrzymie kontrowersje. Automatycznie generowane na podstawie dostępnych tekstowych i wizualnych danych wypowiedzi i wizerunki osób dawno już nieżyjących stają się coraz powszechniejsze, a niedawno opublikowane badania ekspertów wręcz sugerują, że w nieodległej przyszłości liczba nieżyjących, ale cyfrowo ożywionych osób może przewyższyć liczbę osób żyjących. Niezależnie od już potwierdzonej satysfakcji kontaktu ze zmarłą osobą ze strony np. jej rodziny i bliskich, nieograniczone są możliwości tendencyjnych manipulacji mogących całkowicie zniekształcać rzeczywistość. Problem wirtualnej nieśmiertelności staje się olbrzymim wyzwaniem dla regulatorów cyfrowego świata. Keywords:
cyfrowe odtwarzanie nieżyjących, możliwości manipulacji, niezbędne ale trudne regulacje | |
| 4. | Kędziorski P., Kobaka J., Katzer J., Tysiąc P., Jagoda M., Zawidzki M., Spatial Dataset for Comparing 3D Measurement Techniques on Lunar Regolith Simulant Cones, Data, ISSN: 2306-5729, DOI: 10.3390/data11010010, Vol.11, No.1, pp.1-8, 2026Kędziorski P., Kobaka J., Katzer J., Tysiąc P., Jagoda M., Zawidzki M., Spatial Dataset for Comparing 3D Measurement Techniques on Lunar Regolith Simulant Cones, Data, ISSN: 2306-5729, DOI: 10.3390/data11010010, Vol.11, No.1, pp.1-8, 2026Abstract:
The presented dataset contains spatial models of cones formed from lunar soil simulants. The cones were formed in a laboratory by allowing the soil to fall freely through a funnel. Then, the cones were measured using three methods: a high-precision handheld laser scanner (HLS), photogrammetry, and a low-cost LiDAR system integrated into an iPad Pro. The dataset consists of two groups. The first group contains raw measurement data, and the second group contains the geometry of the cones themselves, excluding their surroundings. This second group was prepared to support the calculation of the cones’ volume. All data are provided in standard 3D file format (.STL). The dataset enables direct comparison of resolution and geometric reconstruction performance across the three techniques and can be reused for benchmarking 3D processing workflows, segmentation algorithms, and shape reconstruction methods. It provides complete geometric information suitable for validating automated extraction procedures for parameters such as cone height, base diameter, and angle of repose, as well as for further research into planetary soil and granular material morphology. Keywords:
handheld laser scanning, photogrammetry, low-cost LiDAR, 3D modeling, regolith simulants, cone geometry, laboratory measurement | |
| 5. | Sequeira A., Węglewski W., Bochenek K., Hutsch T., Jarząbek D., Weissgaerber T., Basista M., Effect of SiC and Al2O3 reinforcements on the thermal conductivity of functionally graded AlSi12 matrix composites, CERAMICS INTERNATIONAL, ISSN: 0272-8842, DOI: 10.1016/j.ceramint.2025.12.394, pp.1-17, 2025Sequeira A., Węglewski W., Bochenek K., Hutsch T., Jarząbek D., Weissgaerber T., Basista M., Effect of SiC and Al2O3 reinforcements on the thermal conductivity of functionally graded AlSi12 matrix composites, CERAMICS INTERNATIONAL, ISSN: 0272-8842, DOI: 10.1016/j.ceramint.2025.12.394, pp.1-17, 2025Abstract:
Functionally Graded Materials (FGMs) are characterized by their gradual spatial variation in composition and properties, which lead to enhanced performance under various operating conditions. Thermal conductivity plays a crucial role in the design of engineering systems where temperature regulation is crucial. This study examines the thermal conductivity of AlSi12 matrix FGMs reinforced with two types of ceramics: silicon carbide (SiC) and aluminum oxide (Al2O3). The powder metallurgy route employing two consolidation techniques (hot pressing, HP and spark plasma sintering, SPS) was utilized to produce ungraded composites and three-layer FGMs with ceramic content of 10, 20, and 30 vol%. The influence of reinforcement type and processing method (HP vs. SPS) on the thermal conductivity was analyzed from room temperature up to 300 °C. It was found that, in composites with a lower ceramic content the aluminum matrix predominantly governs the overall thermal conductivity. In contrast, porosity and interfacial compounds become the controlling factors at higher ceramic contents, particularly in the AlSi12-SiC system. Processing techniques played a crucial role in the evolution of the matrix microstructure in the considered temperature range. For AlSi12-Al2O3 composites and FGMs, HP samples exhibited higher thermal conductivity than SPS samples, due to Al grain growth and lower porosity. For AlSi12-SiC composites produced by HP and SPS, TEM analysis revealed interfacial oxide layer formation around the Al and SiC grains. These oxide layers contributed to a significant decrease in thermal conductivity of AlSi12-SiC composites at elevated temperatures. Samples fabricated via HP had higher relative densities than those produced by SPS. This is an unusual result, as the opposite is typically reported in the literature. The pivotal role of ceramic particle type and interfacial characteristics in shaping the thermal performance of AlSi matrix FGMs was confirmed. Keywords:
sintering, composites, thermal conductivity, Al2O3, SiC | |
