The symptoms of restricted joint mobility can present considerable challenges and adversely impact an individual's quality of life. Physical therapy rehabilitation is a commonly employed intervention to alleviate this issue. In this study, a passive motion device specifically designed for forearm supination and pronation was developed. The paper describes the structural analysis, design, fabrication, and evaluation of the apparatus. The device was constructed utilizing a pneumatic soft actuator that applies direct pressure to the affected region. The actuator comprises an aluminum laminated film and an air supply tube. The mechanism functions by exerting direct pressure on the wrist and executing actions on the forearm. The structure and the soft actuator underwent preliminary examination, and its design and fabrication were predicated on the study's findings. A force evaluation trial was performed, and a questionnaire was disseminated to ten participants to evaluate the device's efficacy. The outcomes demonstrated that the participants were capable of executing passive movements of internal and external rotation, and the apparatus facilitated other movements within 60% to 80% of the reference range of motion.

In order to prevent global warming, there is a need to reduce emissions of carbon dioxide, a greenhouse gas, and compressors for refrigeration and air conditioning are required to improve their efficiency and reliability. This paper focuses on scroll compressors and examines weld deformation, which affects both efficiency and reliability. A scroll compressor consists of a cylindrical casing with a lid cap and bottom cap welded circumferentially to both ends of the casing, in which the compression element and electric motor are hermetically sealed and mounted. The frame and bottom frame, which comprise the bearings, are rivet-welded to the casing, and deterioration of the coaxiality of these two parts is a problem that directly affects the performance and reliability of the compressor. Experimental and analytical investigations of weld deformation in scroll compressors have revealed the following. When the casing and frame/lower frame are positioned coaxially, the change in coaxiality due to weld deformation is about 2 to 7 × 10^-5 rad, and excessive weld deformation does not occur.