Susy Susmartini

Mismatch analysis of elementary school desk and chair key characteristics in Indonesia

In this research we analyze the mismatch between desk and chair key characteristics and the respective pupil’s anthropometric data. Sample is taken from11 public elementary schools in six regions in Central Java Indonesia. Mismatch comparisons are made among existing desk and chair, Indonesia National Standard (SNI) dimensions of desk and chair, and dimensions from pupil’s anthropometric data. From the results of the analysis, seat height and desk height have the highest mismatch, while seat width and under desk clearance have the lowest mismatch. In general, four key characteristics dimensions from pupil’s anthropometric data are considered to have better match compared to existing and SNI key characteristics dimensions. A redesign is needed due to the results of the analysis.

Review of intelligent wheelchair technology control development in the last 12 years

The number of disability in several countries is high and continues to rise. This attracts researching to conduct more research in disability. The limitation of mobility is an important issue to be considered for disabled people so it does not rely on others to do their daily activities. Wheelchair is one of assistive technology which aims to help people who suffered in mobility. Nowdays, wheelchair development is not only limited to manual wheelchairs that need to be driven by its users, but also there is an intelligent wheelchair that is designed to be move automatically making it easier for the user. This paper aims to review of wheelchair technology control development in the last 12 years so that it could give some vision about further research to develop a wheelchair.

Improving the work position of worker based on manual material handling in rice mill industry

In traditional industries still using manual material handling to weight lifting. Worker at the rice mill, especially in rice filtering activity has wrong ergonomic posture to enforce the body bends and carried loads too heavy cause of injury for lower back and waist. The work attitude is unnatural posture. This study aimed to determine the severity of the workload, the level of risk posed to the rice taking activities and suggested as an improvement to it. Identify the operator complaints used Nordic Body Map method. Rapid Entire Body Assessment (REBA) method is used to provide an assessment of the working posture of the operator. Assessment of the working posture on rice filtering process shows that REBA score is 12 with an explanation very high level of risk and action level is 4 which means the action needs to be repaired immediately. Biomechanics calculation shows result 6713.21 N, the result of the calculation of the biomechanics of worker in the rice filtering activities indicates that the activiti...

Conceptual design of wearpack with physiology detector feature based on wearable instrumentation

Every company in Indonesia is responsible for their worker health and safety condition as mentioned in UU No I year 1970. In manufacturing industries, there are many manual tasks dealing with high work load and risk, so that they require excellent concentration and physical condition. There is no ideal way to guarantee worker safety without a real time physiological monitoring. This paper reports our ongoing study in conceptual design development of worker’s clothing which is equipped with a wearable instrumentation system. The system is designed to detect and measure body temperature and pulse in real time. Some electrical components such as, LCD (liquid crystal display), LEDs (light emitting diode), batteries, and physiological sensors were assembled. All components are controlled by a wearable on board controller. LEDs is used as alert which can indicate abnormal physical conditions. The LCD was added to provide more detail information. TMP 36 and XD-58C were selected as the physiological sensors. Fina...

A proposed power assisted system of manual wheelchair based on universal design for eldery

Difficulties in walking is high percentage case in the limitations mobility of the elderly. An assisted technology commonly used to help the elderly who have walking difficulty is a manual wheelchair. However, the elderly frequently experiences difficulties in operating manual wheelchair due to gradually degradation of their physical condition. Preliminary study results showed that the average grip strength of the hands of seven elderly subjects was 13.8 ± 6.96 kg and the value is relatively weak. In addition, the mean maximum speed of 7 elderly subjects when doing to round the wheelchair is 0.6 ± 0.2m / s. This value is only 56.4% compared with an average speed of 20-23-year age group (8 males), which is 1.1 ± 0.1 m / s. This shows that the elderly who have walking difficulty have low grip strength and speed in operating a wheelchair. On the other hand, manual wheelchairs suffer an inadequate technology solution to solve the problem. Therefore, an assistive technology is proposed to create mobility aid to accommodate the elderly needs. One approach used is Universal Design. This paper proposes a system of intervention in the manual wheelchair through the 7 principles of Universal Design approach. The preliminary principle has not been able to accommodate the needs of the elderly will become a reference in the proposed design of this study.Difficulties in walking is high percentage case in the limitations mobility of the elderly. An assisted technology commonly used to help the elderly who have walking difficulty is a manual wheelchair. However, the elderly frequently experiences difficulties in operating manual wheelchair due to gradually degradation of their physical condition. Preliminary study results showed that the average grip strength of the hands of seven elderly subjects was 13.8 ± 6.96 kg and the value is relatively weak. In addition, the mean maximum speed of 7 elderly subjects when doing to round the wheelchair is 0.6 ± 0.2m / s. This value is only 56.4% compared with an average speed of 20-23-year age group (8 males), which is 1.1 ± 0.1 m / s. This shows that the elderly who have walking difficulty have low grip strength and speed in operating a wheelchair. On the other hand, manual wheelchairs suffer an inadequate technology solution to solve the problem. Therefore, an assistive technology is proposed to create mobility aid t...

Manual wheelchair intervention on transmission system by assistive technology to increase user mobility

Mobility is an individuals ability to be able to move freely, easily, and organized with the aim to meet the needs of the activity in order to maintain health. Individuals who have limited runs require walking aids, one of these tools is a manual wheelchair. The need for technology applied to these tools, so as to improve the quality of life of individuals who have limited runs. The goal of this research is to intervene in problems hub to improve the mobility of the manual wheelchairs user, as efforts to implement assistive technology to increase the mobility of users. To find out the needs of users, we design questionnaires based on seven key principles of universal design. Results of the questionnaire showed that wheelchairs users are fatigue when using a manual wheelchair. Preliminary studies indicate that the location of the hub effect is not significant to the speed of the wheelchair so that the suggestions given to improve the speed of the wheelchair is by change the type of hub. Then this design also uses TRIZ method, where there are some contradictions against the expected technical needs. Based on TRIZ methods, the inventive solution obtained is parameter changes, mechanical substitution, and self-service. So use internal gear 3-speed hub as a solution to the problems of transmission in a manual wheelchair.

Mismatch Analysis of Elementary School Furniture in Several Regions of Central Java, Indonesia, and Redesign Recommendations

The aim of this article was to determine the mismatch between the existing desks and chairs in elementary schools and the anthropometric measurements of students in several regions of Central Java, Indonesia. Based on the mismatch, recommendations are given to improve the fit of the desks and chairs with the students’ anthropometry. Five critical dimensions of desk and chair were included in the analysis: seat height (SH), seat depth (SD), seat width (SW), desk height (DH), and under-desk clearance (DC). The analysis provided three critical chair dimensions and two critical desk dimensions with a high degree of mismatch. ANOVA and Tukey tests were performed to determine the grouping of students’ anthropometric data. Four sizes of chair and three sizes of desk are proposed based on the results of the analysis. The proposed dimensions lower mismatch more than the existing dimensions.

Visualization and verification for conceptual design of UNS LPPD hand using CAD/CAE

This paper presents a visualization and verification for conceptual design of UNS LPPD hand based on previous studies. LPPD conducted and focused some researches on providing the low-cost prosthetic hand to respond the need of affordable prosthetic hand in Indonesia. Based on previous research, the new conceptual prototype is designed. The design must consider mechanical criteria by using simple electronic and mechanical properties for control and low energy consumption. This research focused on making the low-friction prosthetic hand design on finger and drive function mechanism. The conceptual prototype was realized into physique prototype and need to be tested for making sure the system is running well. The first step of this research visualizes the concept to detailed design using CAD and prototyping method to bring on the conceptual design of UNS LPPD hand. The end of this research is verifying the design by calculation and testing using engineering analysis techniques.

Mismatch Analysis of Elementary School Desk and Chair Using Monte Carlo Simulation

In this paper, we analyze the mismatch between the desk and chair key characteristics and pupil’s anthropometric data. Samples were taken from public elementary schools in six regions (Surakarta, Sukoharjo, Sragen, Karanganyar, Boyolali, and Klaten) of Central Java Indonesia. Mismatch comparisons are made among existing desk and chair, Indonesia National Standard (SNI) dimensions, and the dimensions from pupil’s anthropometric data. Monte Carlo simulation method is used to find the smallest mismatch among the anthropometric percentiles data. From the analysis of simulation result using Crystal Ball software, seat width and under desk clearance have the lowest mismatch. The seat height and desk height from desk and chair dimensions from pupil’s anthropometric data have the lowest mismatch comparing to the existing and SNI desk and chair dimensions.

Redesigning Manual Wheelchair for Disabled Children Using Anthropometry Data and Biomechanical Analysis

Wheelchair is an important equipment to assist people with lower body disability to move from one place to another. The aim of this research is to redesigning manual wheelchair for disabled children using anthropometry data and biomechanical analysis. Anthropometry data is used to determine the dimensions of the wheelchair, while the biomechanical analysis is used to compare the performance of the existing and proposed design. This research resulted a new design which gives more comfort to the users and used a lever mechanism to move the wheelchair. The results of biomechanical analysis show that the force to move the proposed wheelchair is larger than the existing one. It makes more loads are given to the elbow and shoulder of the users. Better performance is shown by the proposed design in the reaction force in neck and lumbar which will reduce the complaining pain of the users in their back.