| 1. | Markovskyi A., Rosiak M., Vitalii G., Fedorov A., Ciezko M., Szczepański Z., Yuriy Z., Kaczmarek M., Litniewski J., Pakuła M., Acoustic microscopy study on elasto-mechanical properties of Lu 3 Al 5 O 12 :Ce single crystalline films, CrystEngComm , ISSN: 1466-8033, DOI: 10.1039/D5CE00068H, pp.1-13, 2025 Markovskyi A., Rosiak M., Vitalii G., Fedorov A., Ciezko M., Szczepański Z., Yuriy Z., Kaczmarek M., Litniewski J., Pakuła M., Acoustic microscopy study on elasto-mechanical properties of Lu 3 Al 5 O 12 :Ce single crystalline films, CrystEngComm , ISSN: 1466-8033, DOI: 10.1039/D5CE00068H, pp.1-13, 2025Abstract:
This article presents experimental, theoretical, and numerical studies of the propagation of guided ultrasonic waves in a layered epitaxial structure of garnet compounds. A microscopic model, which yields dispersion equations based on material and geometrical properties, is developed. Acoustic microscopy experiments on a YAG:Ce crystal substrate and an epitaxial structure containing LuAG:Ce single crystalline films, grown using the liquid phase epitaxy growth method onto a YAG:Ce crystal substrate, reveal distinct phase velocity behaviors. The YAG substrate exhibits consistent velocities, minimally influenced by frequency, while the epitaxial structure shows dispersion, indicating frequency-dependent phase velocities. Experimental results are compared with numerically calculated dispersion curves, showing high agreement in the low-frequency range and minor deviations at higher frequencies. An optimization procedure is developed and applied, starting with the YAG substrate and extending to the LuAG:Ce film/YAG:Ce crystal epitaxial structure. The procedure allows for the extraction of material properties, offering valuable insights into the mechanical characteristics of the all-solid-state LuAG:Ce film/YAG:Ce crystal structure. This research represents a significant advancement in understanding ultrasonic wave dynamics in layered structures, particularly unveiling previously unexplored elastic properties of LuAG:Ce single crystalline films as a well-known scintillation material. |  |
| 2. | Piotrzkowska-Wróblewska H. E., Bajkowski J. M., Dyniewicz B., Bajer C. I., Identification of a spatially distributed diffusion model for simulation of temporal cellular growth, JOURNAL OF BIOMECHANICS, ISSN: 0021-9290, DOI: 10.1016/j.jbiomech.2025.112581, Vol.182, pp.1-7, 2025Piotrzkowska-Wróblewska H. E., Bajkowski J. M., Dyniewicz B., Bajer C. I., Identification of a spatially distributed diffusion model for simulation of temporal cellular growth, JOURNAL OF BIOMECHANICS, ISSN: 0021-9290, DOI: 10.1016/j.jbiomech.2025.112581, Vol.182, pp.1-7, 2025Abstract:
This study introduces a spatially distributed diffusion model based on a Navier–Stokes formulation with a pseudo-velocity field, providing a framework for modelling cellular growth dynamics within diseased tissues. Five coupled partial differential equations describe diseased cell development within a two-dimensional spatial domain over time. A pseudo-velocity field mimics biomarker concentration increasing over time and space, influencing tumour growth dynamics. An Keywords:
Tumour growth, Cellular growth, Cancer, Navier–stokes, Diffusion, Finite element method | |
| 3. | Żołek N.S., Pawłowska A., Comment on 'CAM-QUS guided self-tuning modular CNNs with multi-loss functions for fully automated breast lesion classification in ultrasound images', PHYSICS IN MEDICINE AND BIOLOGY, ISSN: 0031-9155, DOI: 10.1088/1361-6560/ada7bc, Vol.70, No.3, pp.038001-038001, 2025 |  |
