COVID-19, caused by the coronavirus (SARS-CoV-2), emerged in China December 2019 and quickly spread all over world; deeply affected people's health life. In early 2020, an effort to reduce risk of COVID-19 prevent spread, schools around world essentially suspended in-person education then began distance education. However, is not a method that particularly applicable field applied addition, it ...

The paper proposes a new ergonomic and electronic solution for the muscle stimulator. The device is programmable. It can be easily adjusted by the doctor, as well as by the patient. The design solution of this muscle stimulator has the improved interface. The device is safe to use and has determined ergonomic improvements. This muscle stimulator has small dimensions and light weight. The propos...

Using a toothbrush to clean the teeth for pet dog is best way maintain pet’s oral health. Meanwhile, angle of neck can influence posture and brushing strength caretaker, thereby affecting cleaning efficiency. In order compare efficiency toothbrushes with varied types, 20 volunteers caring experience were selected. A medium-sized tooth model coated water soluble pigment was provided each volunte...