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Work-related temporary hearing loss and associated factors among textile industry workers in Amhara region, Ethiopia: a cross-sectional study.
BMJ Open
December 2024
Department of Environmental and Occupational Health and Safety, College of Medicine and Health Science, Institute of Public Health, University of Gondar, Gondar, Ethiopia.
Objectives: This study was designed to assess occupational noise exposure levels, prevalence of temporary hearing loss and associated factors among textile industry workers in Amhara region, Ethiopia.
Design: An institution-based, cross-sectional study was conducted between June and July 2022. Participants were selected via a simple random sampling technique.
Enhanced second harmonic generation in a 2 polymorph of CHNOZn for UV nonlinear optical applications.
Dalton Trans
January 2025
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China.
The quest for novel nonlinear optical (NLO) polymorphs is pivotal for advancing laser technology and frequency conversion applications. We present a detailed study on the synthesis and properties of the 2 polymorph of CHNOZn, which exhibits an enhanced second harmonic generation (SHG) effect, 0.3 times that of KDP, nearly 8-fold higher than the 422 phase.
View Article and Find Full Text PDFInvestigation of the Sensitivity of Acoustic Emission to the Differentiation Between Mode I, II, and III Fracture in Bulk Polymer Materials.
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Department of Mechanics of Materials and Constructions (MeMC), Vrije Universiteit Brussel, B-1050 Brussels, Belgium.
There is very limited research in the literature investigating the way acoustic emission signals change when polymer materials are undergoing different fracture modes. This study investigates the capability of acoustic emission to recognize the fracture mode through acoustic emission parameter analysis, and can be considered the first-ever study which examines the impact of different loading conditions, i.e.
View Article and Find Full Text PDFComparison of the Influence of Polypropylene (PP) or Polybutylene Terephthalate (PBT)-Based Meltblown and Polyester/Polyamide-Based Hydroentangled Inner Layers on the Sound and Thermal Insulation Properties of Layered Nonwoven Composite Structures.
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Department of Textile Engineering, Faculty of Engineering, Erciyes University, 38039 Kayseri, Türkiye.
Thermal and sound insulation play a vital role in today's world, and nonwoven composite structures including microfiber layers provide efficient solutions for addressing these demands. In this study, the sound and thermal insulation properties of nonwoven composite structures, including single-layer meltblown, multilayer meltblown, hydroentangled, and nanofiber nonwoven inner layers, were compared statistically by using Design Expert 13 software. The inner layer type and outer layer type of the composite structures were considered as independent variables, and thickness, bulk density, air permeability, sound absorption coefficient, and thermal resistance of composite structures were evaluated as dependent variables during statistical analyses.
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