MyMedR

Displaying all 11 publications

Abstract:

Sort:

Fulltext A comparison study for the road condition with hand grip force and muscle fatigue

Seri Rahayu, Mohammad Firdaus, Mohd Fa’iz

Malaysian Journal of Public Health Medicine, 2016;16(10):0-0.
MyJurnal

The purpose of this study is to compare the road conditions (straight road, winding road and hill road) with the hand grip pressure force and muscle fatigue for male and female drivers. Ten subjects were participated in this study. The force measurement and electromyography (EMG) responses were taken and evaluated by using the tactile grip and pressure measurement (Grip System) and Electromyography (EMG) device. The result indicated that the winding road produced more muscle fatigue and high hand grip pressure force compared than downhill road, hill up road, and straight road for both male and female subjects. The result compared the muscle fatigue and hand grip pressure force between the first 15 minutes and last 15 minutes of driving activity. The muscle fatigue increasingly high for the last 15 minutes compared to first 15 minutes. However, the hand grip pressure forces become high during the winding road for first 15 minutes of driving session. The muscle fatigue become high as the hand grip pressure force value is high. Furthermore, the male drivers exert higher hand grip pressure force and higher muscle fatigue compared to female drivers. This study can be used as a guideline for the future studies, primarily in solving the driving fatigue problem among the Malaysian’s drivers. The method of this study could also be used for early detection of driver fatigue issues. Indirectly, the findings could reduce the number of car accidents in Malaysia.
Fulltext Validity and reliability of Vicon™ motion capture camera over the traditional anthropometric method

Muhammad Fikri, Z., Ruzy Haryati, H., Seri Rahayu, K.

Malaysian Journal of Public Health Medicine, 2018;18(102):142-151.
MyJurnal

Anthropometric study is one of the oldest branches of study in ergonomics where it serves a purpose in study of
proportion and size for human body. One of the common methods used in anthropometric measurement is traditional
measurement or direct measurement. However, Malaysia is still left behind other countries in development of national
anthropometric database. Researchers in Malaysia are still relying on the traditional anthropometric (TA)
measurement. There are several important factors that contribute to problems in TA such as accuracy, time, posture,
identification of landmarks, instrument positions and orientations, and pressure exerted due to measuring equipment. In
view of the fact that the difficulties of obtaining human anthropometry, it becomes necessary to propose a method which
has less contact executed to respondent. This study aims to propose a new anthropometric measurement method using
motion capture camera (MCC) method, later to develop the database for youth male population. A pilot test was done
in order to confirm the measuring procedure as well as the flow of the study. Next, the Minitab statistical software used
to check the validity and reliability of data using the tests of a) Accuracy-Pearson/Spearman Correlation b) BiasPaired
T-Test c) Test-Retest Reliability-Pearson/Spearman Correlation d) Precision-Mean Absolute Difference and
Relative Error Measurement. Results showed that the validity and reliability of this motion camera has successfully
obtained and the anthropometric data for youth male respondents has successfully constructed. These findings can be
used and expended to the national anthropometric database to be utilised in ergonomics design.
Fulltext Manual handling process on concrete panel lifting using ergonomic approach

Hussein Md Zan, Shapie, Sinatu Sadiah, Rahim Ishak, Md Saifuddin Yusop, Seri Rahayu Kama

Journal of Occupational Safety and Health, 2019;16(2):31-39.
MyJurnal

Precast concrete panel is one of the Industrial Building System (IBS) components currently used in modern construction industry, especially, in a highly populated urban area in Malaysia, owing to its cost and time efficiency in a project completion. However, the constraints lie in Musculoskeletal Disorders (MSDs) when IBS workers manually lift the concrete panel repeatedly. The aim of this study is to analyze the recommended weight limit (RWL), lifting index (LI) and physiological experience among workers while lifting precast concrete panel with 3300mm x 600mm size and compressive strength of 40MPa. The methods involved include a survey through the Nordic questionnaires, interview sessions, NIOSH lifting index calculation, recommended work limit calculation, Rapid Upper Limb Assessment (RULA) and video recording. The results yielded the MSDs problem. The guidelines of recommended weight limit and lifting index are produced. They benefit workers and increase their awareness on the MSDs issues.
Fulltext A survey on working postures among Malaysian industrial workers

Raemy Md. Zein, Noorul Azreen Azis, Isa Halim, Adi Saptari, Seri Rahayu Kamat

Journal of Occupational Safety and Health, 2015;12(1):125-131.
MyJurnal

Working in a safe working posture is a necessity to enhance occupational health of industrial workers. Poor
working posture may lead to injuries, discomfort and fatigue to the workers. The objective of this study is to survey the
postures practised by the Malaysian industrial workers. A questionnaire survey was performed among 282 Malaysian
industrial workers in 10 different industries. From the answered questionnaire, it was observed that shoulder at chest
level (30.1%), back in a bent forward (33.3%) and lifting heavy load (44.7%) are the major work postures practised by
most of industrial workers. This survey identifies that working with shoulder and hand at chest level and back region
moderately bent forward is the main working posture practice by worker. Workers also reported lifting load below 5 kg
at the workstation. This survey recommended for industrial workers to be aware of the comfortable working posture
to avoid injury.
Fulltext A study of psychophysical factor (heart rate) for driver fatigue using regression model

Mohammad Firdaus, A., Mohamad, M., Ruzy Haryati, H., Kalthom Husain, Seri Rahayu, K.

Malaysian Journal of Public Health Medicine, 2018;18(102):1-9.
MyJurnal

Driving activity has become more important as this medium being practical, it is also cheaper and faster in
connecting human from one to another place. However, in some occurrence, it can cause accidents as they become
fatigued while driving. Driver fatigue is one of the top contributors to the road accidents and can be dangerous as
other road safety issues such as drink driving. Worst is, there are no laws regulating driver fatigue. Therefore, the
main purpose of this study is to develop the regression model of apsychophysical factor for drivers’ fatigue which can
predict the relationship between the process input parameters and output responses. The study was participated by
ten subjects. The heart rate was taken and recorded using heart rate monitor. Design Expert 8.0.6 software was used
for the regression analysis. The modeling validation runs werewithin the 90% prediction intervals of the developed
model and the residual errors were less than 10%. The R
2
value is 0.9400 whichmeans that the linear regression line
passed exactly through all points. The significant parameters that influenced the heart rate were also identified.The
parameters are time exposure, type of road, and gender.
Fulltext Analysis on the effect of personalised insole for prolonged standing industrial workers

Siti Khadijah, K., Ruzy Haryati, H., Seri Rahayu, K., Muhamad Fauzie, A., Norhazirah, L.

Malaysian Journal of Public Health Medicine, 2018;18(102):24-31.
MyJurnal

Working in prolonged standing position among industrial workers has been shown to be associated with different
potentially serious health outcomes, namely lower back pain, leg pain, fatigue, discomfort, and other health issues.
Personalisation of insole offers a solution that will provide a perfect fit and comfort to the shoes wearer based on
the ergonomic considerations. It works in a way that it alters the pressure away from painful areas by increasing the
surface area that supports the weight of the body and evenly distributes it to the whole plantar area. Survey was
conducted among workers at a manufacturing industry company to study on the level of pain experienced by them
together with their foot anthropometry. Then, the foot pressure of each of the workers was collected by using
pressure measurement device (F-scan). Combination of these data was used to design the customized insole that is
fit for the worker. The personalised insoles were fabricated by using Additive Manufacturing technology. After that,
the insoles were validated by using the F-scan and Electromyogram (EMG) to ensure their effectiveness in reducing
pressures on the foot and muscle activity hence improving the comfort of the shoe wearer. At the end of the
experiment, it was found that the insole is able to reduce the peak pressure of four out of five areas of the worker’s
foot with the reduction of pressure percentage ranging from 6% to 28%.
Fulltext Level of indoor air quality among Malaysian commuter users: a case study

Wan Hasrulnizzam, W.M., Fatimah, A., Seri Rahayu, K., Ruzy Haryati, H., Noor Amira, M.R.

Malaysian Journal of Public Health Medicine, 2018;18(102):79-88.
MyJurnal

Research on environmental ergonomics of train/commuter is very limited. Thus, this study was conducted with aims
to determine the environmental ergonomic of public transport, whether it is in accordance to indoor air quality
standard inside women coach cabin train during operations. Although the number of passengers is increasing, some
claimed that the indoor air quality for the Malaysian commuter train is uncertain, especially at peak times.
Unsatisfactory feedback from some respondents—especially female passengers—will affect other passengers to
remain loyal to use this facility as one of the main transportation to reduce the traffic congestion that will be faced
if using private vehicles. The study conducted during peak hours on the weekends and the trip took exactly two hours
and covered 18 main stations. The measurement devices placed at the centre of the cabin Komuter using Air Quality
Meter (AIRFLOW Instrument Model TA465). The main parameters measured were temperature, humidity, and carbon
dioxide (CO2). This study also counts the number of passengers riding the train. The results showed that the indoor
air quality (AIQ) level of the morning hour will affect passengers’ health more compared to the evening hour (this is
due to the CO2 level that has exceeded the safety standard). Morning hour gave higher reading of CO2 (43.8%) and
relative humidity (17%) compared to evening hour. Evening hours also showed greater temperature at 3%. The
findings can give awareness to the train company to improve the IAQ by installing a suitable ventilation system and
can give comfort to the passengers when travelling using Malaysian commuter train.
Fulltext Preliminary study on visual technology in human anthropometry measurement for automotive design

Mohd Fa'iz Wahid, Seri Rahayu Kamat, Syamimi Shamsuddin, Dian Darina Indah Daruis

Malaysian Journal of Public Health Medicine, 2018;18(102):97-103.
MyJurnal

This paper reviews various papers since the year 2000 until 2016 regarding visual technology in human anthropometry
study, and discusses three major points; (1) the methods and objectives of the research, (2) the subjects of the
experiments and (3) body parts involved in the anthropometrical measurements. Measurement using visual
technology is claimed to be more accurate in obtaining anthropometrical data compared to the conventional method
using manual tools. However, commercial visual technology system can be very costly. Based on the reviewed
studies, a significant amount of research has adopted various visual processing methods to predict the human’s body
measurement. All of the studies utilized the applications of enhanced technologies that are able to reduce time and
human errors that normally occur during traditional hand-operated measurement. Usually, in order to prove that
their result is promising, the studies compared their results with the results gained from manual measurement. The
finding from this review is a preliminary step towards developing a camera-based system in anthropometry
measurement for the use in automotive ergonomics design.
Fulltext Analysis the influence of heart rate and muscle activity towards muscle fatique in layup workers

Noor'Ain Azizan, Seri Rahayu Kamat, Nur Syafiqah Rayme, Ruzy Haryati Hambali

Journal of Advanced Research in Applied Sciences and Engineering Technology, 2018;11(1):99-107.
MyJurnal

Repetitive movement can lead to the pain muscle, nerves, and tendons that cause by
repetitive overuse of working task. The muscle will fatigue due to; repetitive
movement, force that been applied, posture during working and duration of working.
The stress level during working can influent the energy performance usage during
working. The aim of this paper is to analyse the influence of heart rate and muscle
activity of workers in composite manufacturing towards muscle fatigue. The data was
collected for a worker in hand layup department and the Qualitative method was used
in a way to investigate the working load and level of pain received by their body. Then,
the Qualitative data was sorted and the respondent proceeded for a Quantitative
method which involves muscle activity analysis and heart rate analysis. The tools that
were used to conduct these experiments were surface electromyography (sEMG),
Wristwatch with chest strap and perceived stress scale (PSS). The experimentation
used to calculate the average reading of heart rate and muscle activity during working
and detect the duration the muscle to start fatigue. Moreover, this paper analysed the
relationship between heart rate and muscle activity through the duration of working.
As an overall finding of this research, it was shown that the heart rate of the workers
influence the muscle activity of workers and has high potential relationship to the
fatigue of muscles of the workers in the layup department.
Fulltext Conceptual framework of lean ergonomics for assembly process: PDCA approach

Ahmad Nawawi Mohd Amin, Wan Hasrulnizzam Wan Mahmood, Seri Rahayu Kamat, Ilyana Abdullah

Journal of Engineering and Science Research, 2018;2(1):51-62.
MyJurnal

The purpose of this paper is to prepare a conceptual framework of hybrid lean and ergonomics for assembly manufacturing process based. The research used PDCA approach as a basis in linking the relationship between lean manufacturing and ergonomics. Comprehensive literature review identify the lean ergonomics issues, best practices, and also the way to improve the ergonomic conditions in the workplace, especially those impacting employees on the assembly process. The findings show that the job design strategies for reducing extreme injuries influence by repetitive tasks. Selections of lean tools and technique, human factors analysis and lean performance measure are the key point on the stages of the PDCA conceptual framework for lean ergonomics in working assembly process. This paper also demonstrates by continuous improvement applied between the elimination of waste and increased productivity and the impacts on the ergonomic conditions to carry out operations and consequently by improving the productivity and well-being of its employees based on implementation of PDCA conceptual frameworks.
Fulltext Development of a decision support system for analysis and solutions of prolonged standing in the workplace

Halim I, Arep H, Kamat SR, Abdullah R, Omar AR, Ismail AR

Saf Health Work, 2014 Jun;5(2):97-105.
PMID: 25180141 DOI: 10.1016/j.shaw.2014.04.002

BACKGROUND: Prolonged standing has been hypothesized as a vital contributor to discomfort and muscle fatigue in the workplace. The objective of this study was to develop a decision support system that could provide systematic analysis and solutions to minimize the discomfort and muscle fatigue associated with prolonged standing.
METHODS: The integration of object-oriented programming and a Model Oriented Simultaneous Engineering System were used to design the architecture of the decision support system.
RESULTS: Validation of the decision support system was carried out in two manufacturing companies. The validation process showed that the decision support system produced reliable results.
CONCLUSION: The decision support system is a reliable advisory tool for providing analysis and solutions to problems related to the discomfort and muscle fatigue associated with prolonged standing. Further testing of the decision support system is suggested before it is used commercially.

Filters

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links