Finite element analysis of artificial hip joint movement during human activities

The range of motion of artificial hip joint during human activities, measured from the postoperative total hip arthroplasty patients, has been reported previously. There were two human activities discussed, i.e. Western-style and Japanese-style. This paper analyzes the hip joint movement during human activities, based on the measured range of motion, using finite element simulation. The Western-style activities consist of picking up, getting up and sitting, while the Japanese-style activities consist of sitting on legs with fully flexed at the knee (seiza), squatting and sitting on legs with fully flexed at the knee (zarei). The aim of this study is to investigate the probability of prosthetic impingement to occur and to calculate the von Mises stress during the activities. A three-dimensional nonlinear finite element (FE) method was used in the simulation. The acetabular liner cup positions were varied. Results show that in the Western-style activities, the picking up activity induces prosthetic impingement in a certain acetabular liner cup position, whereas in the Japanese-style activities there is no prosthetic impingement observed. However, the Japanese's Zarei activity has a critical value in the range of motion. The von Mises stresses during the prosthetic impingement have been shown and the value is higher than the yield stress of the material

PELATIHAN KETERAMPILAN BAHASA INGGRIS ANAK-ANAK DI PANTI ASUHAN GAYATRI WIDYA MANDALA, KABUPATEN TABANAN-BALI

Gayatri Widya Mandala Orphanage is an orphanage that prioritizes education based on the Belief in God whose activities are related to religion, such as making ceremonial facilities (banten) and other activities that preserve local cultural wisdom. In addition, this orphanage prioritizes formal education in schools and non-formal education related to improving children's ability to communicate in English. The problem faced by this orphanage is how to make English lessons more enjoyable and not frightening. The solution given is to provide English training for the children in a fun way, namely with games and adding vocabulary, as well as correct pronunciation. The implementation method used is a survey in the field, determining the schedule of activities, preparation, explanation, training, and ending with an evaluation. The result is that the children really enjoy the training provided and actively interact with the team and it is proven that the results of the evaluation given in writing have obtained good results.

Numerical simulation of artificical hip joint movement for western and japanse-style activities

A numerical simulation model for observing the artificial hip joint movement with respect to the range of motion during human activities is presented in this paper. There were two human activities discussed, i.e. Western-style and Japanese-style. Previous investigation has reported the range of motion on the artificial hip joint for Western-style and Japanese-style, measured from the postoperative total hip arthroplasty patients. The aim of this investigation is to observe the probability of prosthetic impingement and to calculate the von Mises stress during these activities using finite element analysis (FEA). The Western-style activities consist of picking up, getting up and sitting, while the Japanese-style activities consist of sitting on legs with fully flexed at the knee (seiza), squatting and sitting on legs with fully flexed at the knee (zarei). The FEA uses a three-dimensional nonlinear model and considers the variation of the acetabular liner cup positions. Result shows that a prosthetic impingement is found in the Western’s picking up activity. This activity induces a prosthetic impingement in a certain the acetabular liner cup position. In the Japanese-style activities there is no prosthetic impingement observed. However, a critical value in the range of motion was observed for the Japanese’s Zarei activity for certain the acetabular liner cup position. The acetabular liner cup positions influences the probability of prosthetic impingem