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Additive Manufacturing of a Frost-Detection Resistive Sensor for Optimizing Demand Defrost in Refrigeration Systems.
Sensors (Basel)
December 2024
Department of Electromechanical Engineering, University of Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal.
This article presents the development of a resistive frost-detection sensor fabricated using Fused Filament Fabrication (FFF) with a conductive filament. This sensor was designed to enhance demand-defrost control in industrial refrigeration systems. Frost accumulation on evaporator surfaces blocks airflow and creates a thermal insulating barrier that reduces heat exchange efficiency, increasing energy consumption and operational costs.
View Article and Find Full Text PDFExperimental investigation the effect of bamboo micro filler on performance of bamboo-sisal-E-glass fiber-reinforced epoxy matrix hybrid composites.
Heliyon
November 2024
Department of Mechanical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia.
The numerous advantages of natural fiber reinforced hybrid composites, such as their light weight, biodegradability, recyclability, availability, and low cost, have brought them to the forefront for various structural applications in the automotive and aerospace industries. Aim of this study was to evaluate the impact of varying the weight fractions of bamboo micro filler on the tensile, flexural, impact, and water absorption properties of the Sisal-Bamboo-E-glass fiber reinforced epoxy matrix hybrid composite prepared by manual hand layup method. To enhance the bond between natural and synthetic fibers and reduce the hydrophilic nature of natural fibers, bamboo and sisal fibers were treated with 5 % NaOH for 6 and 8 h, respectively.
View Article and Find Full Text PDFA low-cost, open-source cylindrical Couette rheometer.
Sci Rep
December 2024
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
Rheology describes the flow of fluids from food and plastics, to coatings, adhesives, and 3D printing inks, and is commonly denoted by viscosity alone as a simplification. While viscometers adequately probe Newtonian (constant) viscosity, most fluids have complex viscosity, requiring tests over multiple shear rates, and transient measurements. As a result, rheometers are typically large, expensive, and require additional infrastructure (e.
View Article and Find Full Text PDFArticle Synopsis
- In Germany, around 950-1200 laryngectomies are performed each year due to serious throat cancers, which lead to major changes in voice and communication abilities, impacting mental health and social interactions.
- A multidisciplinary rehabilitation team is essential to help patients regain their communication skills through various methods like pseudowhispering, esophageal speech, and tracheoesophageal speech prostheses.
- Tracheoesophageal speech prostheses are considered the best option for clear voice production, but they require regular healthcare visits for maintenance, and educating patients on these methods is crucial for their social reintegration.
Effectiveness of Robotic Devices for Medical Rehabilitation: An Umbrella Review.
J Clin Med
November 2024
Department of Rehabilitation Medicine, School of Medicine, Fujita Health University, Toyoake 470-1192, Aichi, Japan.
Clinical trials have investigated the efficacy of rehabilitation robotics for various pathological conditions, but the overall impact on rehabilitation practice remains unclear. We comprehensively examined and analyzed systematic reviews (SRs) of randomized controlled trials (RCTs) investigating rehabilitative interventions with robotic devices. Four databases were searched using term combinations of keywords related to robotic devices, rehabilitation, and SRs.
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