An acoustic stress increases the metastatic spread of polyoma virus-induced tumors in syrian Hamsters. To try to elucidate the mechanism of this action, we studied the effect of stress on the protection afforded by the virus against tumour challenge. Exposure to ultrasonics during the immunization period markedly decreased the protective effect of the virus.
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This paper proposes a high-performance fiber optic interferometric hydrophone based on composite structure. Based on the air-backed push-pull fiber optic hydrophone structure, the inner elastic tube is replaced by a thick hollow column, introducing axial acoustic pressure sensing to improve the detection sensitivity of the fiber optic hydrophone. The influence of axial stress on the deformation of the composite structure is investigated by theoretical analysis and numerical simulation, and the structural design of fiber optic hydrophone with high acoustic pressure sensitivity and wide frequency response range is realized.
View Article and Find Full Text PDFThe study of mechanical properties and fracture evolution of coal-rock masses under hard roof-soft floor conditions.
Sci Rep
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School of Mechanical and Engineering, Liaoning Technical University, Fuxin, 123000, China.
As the depth of coal mining in China continues to increase, the fracturing of coal rock masses has an increasingly complex impact on the surrounding rock roadways. The majority of the mine's roadways run through coal rock masses with hard roofs and soft bottoms, which typically exhibit complex dynamic behaviour. To further research the mechanical behaviour and fracture evolution of coal rock masses under hard-roof and soft-floor conditions, the study is based on the majority of working faces in a mine, which have hard roofs and soft floors.
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View Article and Find Full Text PDFRecruitment Challenges and Strategies in a Technology-Based Intervention for Dementia Caregivers: Descriptive Study.
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Venn Research Association for the Promotion of Virtual Fencing in Tyrol and the Alpine region. Brixnerstraße 1, 6020 Innsbruck, Austria.
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