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Human factors product design for a prototype of hair loss prevention machine for cancer patients during chemotherapy treatments
(2020-01-01)
Yodpijit, Nantakrit
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Jongprasithporn, Manutchanok
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Treeviriyakijja, Benjama
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Lai-Ngam, Phalinnart
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Boonyarit, Siritip
Hair loss is one of the most troubling aspects of chemotherapy to cancer patients. Studies indicate that hair loss affects the cancer patients’ quality of life and becomes a growing concern among women during Chemotherapy treatments. This research project applies Human Factors Product Design principles for building a prototype of low-cost hair loss prevention machine for cancer patients who are undergoing chemotherapy. The five-step product design and development process is used in this research project including (1) identifying customer needs, (2) determining product specifications, (3) creating concept generation, (4) making concept selection, and (5) concept testing. Preliminary results from this research project indicate that the new product design of hair loss prevention machine has a great potential for launching new products to the market. However, this prototype of hair loss prevention machine still needs some technical improvements for a better product budget preparation. Limitations and future work on product design and development of hair loss prevention machine are also presented.
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Effects of Industry 4.0 on Human Factors/Ergonomics Design in 21st Century
(2020-01-01)
Jongprasithporn, Manutchanok
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Yodpijit, Nantakrit
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Phaisanthanaphark, Chanakamon
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Buranasing, Yotsuda
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Sittiwanchai, Teppakorn
The fourth industrial revolution as known as Industry 4.0 becomes a big part of the digitized economy in the 21st century. Industry 4.0 considerably drives the entire supply chain through digital infrastructures and significantly changes work systems. There are many new jobs and work opportunities available for workers with different skill levels due to society and technological changes. Understanding user needs and new technologies is a key factor for the design and development of products and systems where human exists. It is to ensure that the operation and maintenance of such systems are compatible with human abilities and limitations. The purposes of this paper are to explore theoretical and empirical concepts of Industry 4.0 influencing the design of work systems and present factors affecting human factors/ergonomics design in terms of physical, cognitive and organizational perspectives.
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Human Factors Design of Digital Information Systems for Inspection Body (IB) in Industry 4.0 Era
(2020-01-01)
Jongprasithporn, Manutchanok
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Yodpijit, Nantakrit
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Tontoh, Danitar
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Sittiwanchai, Teppakorn
Industry 4.0 highly considers new industrial products and services platforms where various emerging technologies are combining to implement for digital solutions. Digital transformation plays a significant role in the disruption of the traditional information systems and drives the business to digitalization. The Inspection Body (IB) conducts technical assessments, generally by providing factory/business inspection services on behalf of private customers or their parent organizations to provide them with industrial product certification and/or information on compliance with legislation, standards, specifications, and contractual commitments. Importantly, data accuracy, traceability, and confidentiality controls are critical for IB operations where the digital information systems can significantly enhance the planning, managing, and monitoring of the IB’s Management Information System (MIS). This paper presents both theoretical and practical applications of human factors product design and development to make a useful and easy to use digital information systems for IB. Major methods for human factors design includes the focus of potential users, the empirical measurement of usage, and the iterative design where the simulated, prototype, and real models are created. Limitations and future work for human factors design for digital information systems in other industrial businesses are also discussed.
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Designing and developing a prototype of parents and teachers communication application for early childhood
(2019-01-01)
Jongprasithporn, Manutchanok
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Yodpijit, Nantakrit
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Halligan, Kristin
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Sittiwanchai, Teppakorn
The purpose of this project is to develop Parents and Teachers Communication (PTC) application for early childhood. An application development process has three phases. The first phase is application design phase: the questionnaire had been used to investigate the main requirements from the users (teachers and parents). The application’s function comparison was another method which had been applied in design phase. Five school communication applications had been compared to find for strong features in each application. Human factors engineering was used for designing PTC application’s user interfaces in order to understand user capabilities and limitations. The second phase was application coding phase: PTC application was developed under IOS operation system by using the X-CODE program. The third phase was application usability study phase: in this phase, the usability study test was measured in two steps. First, the System Usability Scale (SUS) was distributed to 10 volunteers during application development. Second, another usability test was done by an adopted SUS questionnaire. It was distributed to 6 volunteers after they had experience with PTC application about two week period. Results showed that PTC application had high usability scale during application development (SUS, 85) and after four weeks experience (adopted SUS, 80). SUS during application development showed that PTC application was in excellent usability scale. The adopted SUS questionnaire can be interpreted that users have a great experience with PTC application. Parent-Teacher communication application for early childhood could assist to decrease cap of communication between home and school efficiently.
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Biomechanical models of computerized prosthetic leg
(2019-01-01)
Yodpijit, Nantakrit
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Jongprasithporn, Manutchanok
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Maneewong, Penpetch
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Faksang, Nanthanit
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Sittiwanchai, Teppakorn
Computer-controlled prosthetic devices are becoming more popular among people of all ages from all over the world suffer amputations. Only 5% of them in need have access to assistive products. This paper presents an analysis and an assessment of biomechanics of physiological gait and the construction of prosthetic leg. The normal gait patterns are performed to develop dynamic biomechanical models of the computerized prosthetic leg for productive simulation of a transfemoral amputee’s gait under different conditions. The purposes of the current research project are to provide and modify biomechanical models for a better understanding of amputee gait and make changes on prosthetic leg components for improving the ambulatory performance. Three-dimensional finite element analysis and Solidworks Simulation are used to investigate kinetic and kinematic characteristics of gait in patients with limb loss. Findings from the current study reveal that most people with lower limb amputations prefer computerized prosthetic leg to passive prosthetic leg.
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Human-centered design of computerized prosthetic leg: A questionnaire survey for user needs assessment
(2019-01-01)
Yodpijit, Nantakrit
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Jongprasithporn, Manutchanok
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Khawnuan, Uttapon
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Sittiwanchai, Teppakorn
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Siriwatsopon, Juthamas
In Thailand, there are approximately 2 million people with disabilities and nearly 50,000 people living with lower limb loss. Previous research investigates the quality of life and factors affecting quality of life of transfemoral and transtibial amputees after receiving prosthesis using a method of WHOQOL – BREF – THAI. However, the WHOQOL – BREF – THAI is a questionnaire that is used to investigate quality of life for normal people not for people living with lower limb loss. Recent records show a lack of satisfaction with the traditional passive prosthetic leg and needs of new active prosthesis with different motor functions. The objective of this research is to design and develop a questionnaire, using human-centered design principles for investigating and improving the quality of life of transfemoral and transtibial amputees after receiving prostheses. The new questionnaire is created based upon both prosthesis evaluation questionnaire (PEQ) and trinity amputation and prosthesis experience scales (TAPES). This questionnaire survey explores user’s satisfaction, usability study, product appearance, comfort and pain, and cleansing and handling the prosthesis. A total of 24 subjects are randomly selected. Data collection and analysis are made from a list of patients in Sirindhorn School of Prosthetics and Orthotics and Veterans General Hospital in Thailand. From the amputees’ point of view, defining their needs is one of the most critical factors in the first step for prosthesis design. Veterans has asked for modern prostheses and they believe that modern prostheses can help them feel more comfortable and natural while performing activities of daily living and improve their quality of life. As a result, this research project provides a list of needs of people living with lower limb loss in Thailand. Findings have indicated that user needs assessment is necessary and critical to make a better computerized lower limb prosthesis design and improve user’s satisfaction.
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The performance improvement of look-alike sound-alike drug pre-dispensing
(2018-08-14)
Jongprasithporn, Manutchanok
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Sunkarat, Wichai
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Homsai, Thanakorn
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Sittiwanchai, Teppakorn
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Yodpijit, Nantakrit
Medical dispensing errors are common and classic human errors in the hospitals. Look-alike, Sound-alike (LASA) drug is one of the main issues in pre-dispensing and dispensing processes. The data in this study were observed from one middle size hospital in Thailand. In 2017, there were two months that the medication errors KPI (0.065 and 0.061) were greater than the accepted error threshold (0.06). The SBAR (Situation, Background, Assessment, and Recommendation) solution and HOSxP software were applied for three months in the pre-dispensing process to reduce the medical dispensing errors. The results showed that the medication errors KPI (0.04, 0.03, and 0.02, respectively) were reduced dramatically. Therefore, implementation of the SBAR and HOSxP software is recommended as a fast and easy solution for medical dispensing errors.
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Human Factors Approach for Powered Transfemoral Prostheses Conceptual Design
(2018-07-02)
Jongprasithporn, Manutchanok
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Yodpijit, Nantakrit
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Pinitlertsakun, Jutamat
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Siriwatsopon, Juthamas
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Guerra, Gary
Prostheses are designed to replace the missing parts of body, and to increase abilities to perform daily activities. Research suggests that using powered prostheses will help improve the quality of life for the end users. Many powered prostheses have focused on only technical approaches, resulting on a lack of user acceptance. The major purpose of this research project is to provide the design of powered transfemoral prosthesis based upon human factors engineering and ergonomics approach for product design and development. Results from this study indicate that this method can be utilized to aid in the design of a microprocessor-controlled powered transfemoral prosthesis and play a significant role for product development.
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Design and Development of a Prototype for Measuring Range of Motion
(2018-07-02)
Jongprasithporn, Manutchanok
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Yodpijit, Nantakrit
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Chanaroon, Thachamaporn
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Paiboonrattanakorn, Thunjira
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Sittiwanchai, Teppakorn
The ability to perform range of motion can help human maintain mobility and flexibility. The transitional device for measuring range of motion is Goniometer, a manual method. This method is depended on users' experience and skill which could lead to wrong interpretation and results. The purpose of this project is to design and develop a prototype for measuring Range of Motion (ROM) by using Inertial Measurement Units (IMUs). The prototype, called ROMie, is including hardware and software. ROMie had been validated for accuracy and sensitivity at 45, 60, 90 and 180 degrees. ROMie was tested for forty times at each angle,. The results showed that ROMie has the overall accuracy greater than 95 percent. Sensitivity is equal 1 at 95 percent confidence interval and greater than 0.875 at 99 percent confidence interval.
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A low-cost portable 3D human motion analysis system: An application of gait analysis
(2017-07-02)
Yodpijit, Nantakrit
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Jongprasithporn, Manutchanok
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Pongmit, Kengkaj
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Sittiwanchai, Teppakorn
Human movement is fast and complicated. Human movement analysis systems are used in occupational biomechanics to have a better understanding of the kinematics of human movement. The purpose of the current research project is to create a low-cost portable human movement analysis system that can be used to investigate human movement for three-dimensional (3D) kinematics analysis using two cameras in an application of gait analysis. This gait analysis system performs image analysis with MATLAB. The design and development method has five major steps, which include (1) the design and calculation of XYZ coordinates (body segment), (2) the design and development of human movement analysis system, (3) the design and development of system calibration, (4) the determination of a 3D Cartesian system, and (5) the design and development of human movement tracking and recording systems. Findings indicate that the total costs of a human movement analysis systems are currently less than 1,500 USD. In addition, this human movement analysis system has many practical uses for outdoor research projects.

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