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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Ergonomics Society of Korea
Journal Basic Information
Journal DOI :
The Ergonomics Society of Korea
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Volume & Issues
Volume 26, Issue 4 - Nov 2007
Volume 26, Issue 3 - Aug 2007
Volume 26, Issue 2 - May 2007
Volume 26, Issue 1 - Feb 2007
Selecting the target year
The Study of Job Stress in Occupational Therapist
Yang, Young-Ae ; Hur, Jin-Gang ; Noh, Young-Man ; Lee, Gyu-Chang ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 1~9
DOI : 10.5143/JESK.2007.26.3.001
The purpose of this study was going to research relation of job stress and society psychologic stress according to general characteristic, work characteristic, health characteristic and personality characteristic for the occupational therapist in the working domestic rehabilitation therapy with hospital and welfare center occupational therapist. The research was 91 of withdrawal questionnaire among 102 occupational therapist from 1. November 2005 to 31. December 2005. In the result of analysis the given question for the ninety one occupational therapist showed just normal group 25% 23 person, potential stress group 47% 43 person, and the rest 28% 25 person high risk group. The result shows significance different in general characteristic of job stress about age, final scholarship and marriage. Job stress was included income, working time, office form and working position etc. Health special job stress was significance different according to sleep time. So we have to know a fact of job stress of occupational therapist and prevent of loss of business services. And we have to endeavoring removals factor of stress and good office culture fixation.
Distortion in Visual Memory for Wide-angle Image
Jang, Phil-Sik ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 11~16
DOI : 10.5143/JESK.2007.26.3.011
Viewers remember seeing more of the scene than was present in the physical input: an illusion known as boundary extension. This study examined the aspects of the distortion by presenting 69 subjects with wide-angle views of four scenes. Results of recognition and reproduction test showed that the boundary extension is not a unidirectional phenomenon. On the contrary, boundary restriction and foreground extension were observed with extreme wide-angle views of scenes. Results support the hypothesis that boundary restriction and foreground extension were mediated by the activation of a memory schema during picture perception.
A Study on the Meaning of Sensibility and Vocabulary System for Sensibility Evaluation
Jung, Hyun-Won ; Nah, Ken ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 17~25
DOI : 10.5143/JESK.2007.26.3.017
'Emotional value' has been a buzz word for design and ergonomics in the era of business innovation. However, the complication of 'emotion' in terms of literal and practical meaning has made it a challenging but confusing task for designers to develop a new product with emotional value. 'Sensibility' and 'emotion' are interchangeable terms to describe human feeling ('gamsung' in Korean). The confusion reached at its peak with Korean terms. Even scholars in Korean language, psychologists, ergonomists, and designers are bewildered at the choice of proper expression for human feeling in both Korean and English. The difficulty could explain the problems in 'sensibility ergonomics' in Korea. The purpose of this paper is to provide both fundamental and satisfying information with people in the area of 'sensibility ergonomics'. Therefore, in this paper, a number of articles and books on sensibility, psychology, sensibility ergonomics, and design were reviewed to clarify the meaning of sensibility and relationship among similar words that have been used with unintentional misunderstanding. Also many adjectives on human sensibility were collected and complied for the use of sensibility evaluation.
Effects of Wrist Position on Electromyographic Activities of Flexor Digitorum Superficials and Extensor Digitorum during Drilling and Pinch Grip
Choi, Ji-Woo ; Jeon, Hye-Seon ; Oh, Yun-Kwon ; Yi, Chung-Hwi ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 27~33
DOI : 10.5143/JESK.2007.26.3.027
The purpose of this study was to investigate influence of wrist position on the electromyographic(EMG) activities of the flexor digitorum superficialis (FDS) and extensor digitorum (ED) during drilling and pinch grip. Eighteen healthy subjects had been recruited and each subject performed two tasks (drilling and pinch grip) at three different wrist positions (
extension). The EMG amplitude of each muscle was normalized to the amplitude in the maximal voluntary contraction (MVC). Repeated one-way ANOVA was used to compare the differences of EMG across wrist positions. The FDS EMG activity in both drilling and pinch grip was lowest at
wrist extension and the highest at
wrist flexion. The ED EMG activity was lowest when the wrist was neutral in both tasks. From the results of this study, we can conclude that the desirable wrist positions for drilling and pinch grip tasks are slightly extended or neutral position. Therefore, flexed wrist position should be avoided to reduce the excessive work load on the finger muscles during the tasks.
The Effects of Work-Related Stress on Workers who are Engaged in the Medium Enterprises
Park, Keun-Sang ; Yeo, Jong-Goo ; Kim, Chang-Han ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 35~43
DOI : 10.5143/JESK.2007.26.3.035
This study aims at providing some basic material to be made use of for establishing plans through which one can reduce job-related stress, through conducting a survey on the sources of stress and then distinguishing its symptoms by the sources. As the methods of the study, we conducted a questionnaire survey of some selected medium enterprises' employees in the National Capital region and analysed the results. The questionnaire was designed by using the dynamic stress model of Cooper and Eaker and consisted of 85 questions to examine the sources of stress, the characteristics of personalities, and symptoms by each type of stress. The total valid respondents were 392 persons indicating 65.3% of the response rate. For analysing the results, a rating scale was used, and the reliability and validity were tested by using Cronbach's alpha coefficient. As the result of the study, those workers in medium enterprises were found to be put under much stress by responsibility, physical environment factors and career development factors and so on. As physical symptoms of job-related stress, eye fatigue, stiffness in their shoulders, headache, worry or anxiety, and waist ache presented most in the respondents. In addition, as behavioral symptoms, chronic fatigue was most indicated. In organizational symptoms, dissatisfaction about the company and lack of self-motivation for the job performance were found to show most. Moreover, the results indicated that the closer personalities to those appearing in persons mostly of type A they had, the more they were put under intensive stress by the vagueness of their roles and responsibility among all the job characteristics.
An Implementation Case of Ergonomics Program at a Shipbuilding Company
Pyo, Yeon ; Jeong, Byung-Yong ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 45~52
DOI : 10.5143/JESK.2007.26.3.045
Shipbuilding workers are potentially exposed to ergonomic hazards in the manufacturing process. The purpose of this study is to describe the impact of an ergonomic intervention and the implementation effect of ergonomics program at a shipbuilding company. This study portrays an implementation procedure of ergonomics program over a period of two years concerning ergonomic hazard analysis and improvement, along with medical management. After implementation of the ergonomics program, the productivity improved, and the rate of accidental incidents decreased, also the loss of workdays decreased largely. The implementation effect of ergonomics program presented in this study can be used to provide baseline information for the prevention of musculoskeletal disorders in the shipbuilding industry.
User Interface Management - Qualitative Analysis Based on Mobile Phone User Interface Applications -
Kweon, O-Seong ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 53~57
DOI : 10.5143/JESK.2007.26.3.053
The User Interface (UI) in the company is more important than ever. But the application of UI for the industry use is restricted by various constraints such as delivery, technical limitation, etc. User Interface designers in the company have thought how to set up the UI organization, how to define identity and goal, how to communicate with other teams, what is the best UI process, and many other issues. In this paper, the author discuss the practical issues arisen when User Interface organization is formed and managed based on the mobile phone manufacture's perspective. The pros and cons of location of UI organization, advanced UI organization, UI member formation, UI role, UI output, UI evaluation, and understanding of UI in the society and company are discussed. This discussion will help UI designers in industry to set up and manage UI organization.
Evaluation of Individual Finger Force to Grip Strength in Various Grip Spans and Hand Sizes
Jung, Myung-Chul ; Kim, Dae-Min ; Kong, Yong-Ku ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 59~65
DOI : 10.5143/JESK.2007.26.3.059
In this study, six grip spans (45mm-65mm) were tested to evaluate the effects of handle grip span and user's hand size on maximum grip strength, individual finger force, and subjective ratings of comfort using a digital dynamometer with individual force sensors. Forty-six males were assigned into three hand size groups according to their hand lengths. Results showed that overall 55mm and 50mm grip spans were the most comfortable sizes and associated with the highest grip strength in the maximum grip force exertions, whereas 65mm grip span was rated as the least comfortable size as well as the lowest grip strength. In the interaction effect of grip span and hand size, small and middle hand sized participants rated the best preference and the least preference grip spans differently with large hand sized participants. With respect to the analysis of individual finger force, the middle finger force was the strongest and the highest contribution to the total finger force, followed by ring, index and little fingers. In addition, it was noted that each finger had a different optimal grip span for exerting maximum force resulting in a bowed contoured shaped handle for two-handle hand tools. Thus, the grip spans for two-handle hand tools might be designed according to the users' hand and finger anthropometrics to maximize performance and subjective perception of comfort.
Interruption in Digital Convergence: Focused on Multi-Modality and Multi-Tasking
Lee, Ki-Ho ; Jung, Seung-Ki ; Kim, Hye-Jin ; Lee, In-Seong ; Kim, Jin-Woo ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 67~80
DOI : 10.5143/JESK.2007.26.3.067
Digital convergence, defined as the creative fusion of once-independent technologies and service, is getting more attention recently. Interruptions among internal functions happen frequently in digital convergence products because many functions that were in separate products are merged into a single product. Multi-tasking and multi-modality are two distinctive features of interruption in digital convergence products, but their impacts to the user have not been investigated yet. This study conducted a controlled experiment to investigate the impacts of multi-tasking and multi-modality on the subjective satisfaction and objective performance of digital convergent products. The study results indicate that multi-tasking and multi-modality have substantial effects individually as well as together. The paper ends with practical and theoretical implications of study results as well as research limits and future research.
Development of Data Base and Interface for Sofa Design Considering Consumer Sensibility
Song, Mi-Jin ; Sim, Joung-Hoon ; Heo, Chun-Wook ; Yoon, Hoon-Yong ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 81~89
DOI : 10.5143/JESK.2007.26.3.081
The purpose of this study is to develop data base and interface for sofa consumers and sofa designers. The human sensibility ergonomics method was used to find the consumer needs and Quality Function Deployment (QFD) method was used to extract the designing characteristics required for sofa production. About 200 words and 100 images were gathered from sofa and furniture related catalogs and internet sites to find the best emotional words and images that can express the various sofa aspect. Among the collected words and images, 34 emotional words were selected for sensibility experiment according to the opinions of experts, relations of closeness and frequency of use, and 50 images were selected for the experiment by the diversity. Selected words and images were used for the semantic differential method with 94 subjects, and sensibility characteristics of sofas were defined through various statistical analysis methods including basic statistical analysis, factor analysis and multi-dimensional scale. In reflecting design characteristics of sofas, design factors of sofas were divided into backrest, seat, armrest, neck support and leg, and relative importance of each factor for design was determined with analytic hierarchy process (AHP) by utilizing the experts' opinions. Based on the results above, relationship analysis between emotional evaluation results and design factors was performed. Also, as various sofa images are presented diagrammatically through multidimensional scaling method, it can be used as an important tool for the development of sofa design. This study will contribute improving the product quality of sofas as it enables applying consumer needs into the sofa design.
A Result of Field Survey for Ergonomic Work Risk Factors in General Hospital
Kim, Jin-Young ; Kim, Yeong-Mee ; Kim, Day-Sung ; Im, Heung-Jae ; Kim, Jeung-Ho ; Kang, Seong-Kyu ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 91~100
DOI : 10.5143/JESK.2007.26.3.091
The purposes of this research are to survey work-related risk factors of musculoskeletal disorders(MSDs) in various departments and tasks at general hospitals in non-manufacturing sectors, and to use basic data derived from the survey results in preventing work-related MSDs in hospital workers. Investigation started in March of 2006 and continued for 6 months in 220 general hospitals at Seoul, Incheon, Kyeongi, and Kangwon area. Investigators visited and interviewed workers in hospitals to identify the presence of tasks of musculoskeletal burden, the investigation results of ergonomic risk factors required by the Occupational Safety and Health Law, statistical analysis from questionnaire for musculoskeletal symptoms, and major departments and tasks that have such risk factors. Twenty-seven percents of hospitals finished the investigation of ergonomic risk factors, and 69% did not do the investigation while remained 4% did not have such factors in their hospitals. The rank order of major departments that had such musculoskeletal burdens was kitchen rooms of 143, managing departments/computer rooms/dispensaries of 137, physical treatment rooms of 109, nursing departments of 96, radiological and clinical laboratories of 63. Eighteen hospitals that did not hold legal duties by the section 148 of labor minister decree practiced prevention programs of MSDs according to the labor-management cooperation. Nursing departments ranked in the first place for the numbers of musculoskeletal symptoms of 438. Managing departments/computer rooms/dispensaries, kitchen rooms, and medical treatment departments held 127, 52 and 45 symptoms, respectively. The magnitude order of physical symptom areas followed shoulder of 185, backs and waist of 166, hand wrists of 120, necks of 110, and legs/feet of 106. The departments and jobs that had major work-related ergonomic risks were patient transporting, central supplying, patient nursing (moving patients into wheel-chairs, changing of patient posture and sheet alteration), manual transporting, operation, and managing/computer departments.
A Study on Usability Evaluation with QFD on Customers' Sensation of Dishwasher
Jin, Beom-Suk ; Cho, Kye-Youn ; Ji, Yong-Gu ; Cho, Gil-Soo ; Kim, Gyoung-Rok ; Lee, Chang-Hui ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 101~109
DOI : 10.5143/JESK.2007.26.3.101
This research is for developing a usability evaluation model based on customer sensation using Quality Function Deployment, which evaluates the relationship between consumer sensation and usability among the physical design factors of dishwashers. Four aspects of the evaluation model; overall sensation factors, detail sensation factors, usability evaluation factors and physical design factors of products were analyzed in three sequential processes of QFD. The sensation evaluation factors and the usability evaluation factors were created from regression analysis of the results of the sensation and usability test. Moreover, thirty-one physical design factors selected through group discussion of ergonomist and manufacturers. Among them, 19 physical design factors according to priority were applied to evaluation model using QFD. With the evaluation model using four aspects, physical design factors influencing user sensation were generated. These factors were 'alarm sound', 'dishwasher size', 'button size' and 'display size'. Consequently, the degree of influences was tested. Design guidelines for dishwashers were derived from finally generated physical design factors.
An Anthropometric Product Design Approach Using Design Structure Matrix (DSM): Application to Computer Workstation Design
Jung, Ki-Hyo ; Kwon, O-Chae ; You, Hee-Cheon ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 111~115
DOI : 10.5143/JESK.2007.26.3.111
Design equations for anthropometric product design are developed by considering the geometrical relationships of design dimensions and anthropometric dimensions. The present study applied the design structure matrix (DSM) method to the development of design equations for a computer workstation, and compared design values from the design equations with corresponding design values of ergonomic recommendations and existing products. The relationships between design dimensions (e.g., legroom and worktable) were analyzed by a DSM, and then the application order of design equations (e.g., seatpan, backrest, armrest, legroom, and worktable in descending order) was determined. Next, design equations were developed by analyzing the geometric relationships between computer workstation design dimensions and anthropometric dimensions. Finally, design values for a computer workstation were determined by considering a standard posture defined and representative human models (5th, 50th, 95th %ile). The design values calculated using the design equations were similar with those of ergonomic recommendations found in literature and two commercial products measured in the study; however, some design values (e.g., seatpan height) were different due to discrepancy in standard posture. The DSM method would be utilized to systematically analyze the relationships between design dimensions for anthropometric product design.
Universal Design of Hangul Input Method for Mobile Phones
Hong, Seung-Kweon ;
Journal of the Ergonomics Society of Korea, volume 26, issue 3, 2007, Pages 117~124
DOI : 10.5143/JESK.2007.26.3.117
A few people are frequently using Korean text entry function in the mobile phone. To make matters worse, too many kinds of Korean text entry methods exist in the market, compelling mobile phone users to learn how to input texts all over again, whenever they purchase a new mobile phone. The purpose of this study is to propose a universal design of Korean text entry method for mobile phones. Several experiments and several questionnaire surveys were conducted in order to induce design factors for the universal design. Participants were mobile phone users with the diverse levels of text entry expertise and with the diverse ages. The results of this investigation were identical, irrespective of participants' age and expertise. The efficiency of the text entry method was not more important factor than memorability. The layout of vowels to keypad was preferred to map just 3 strokes to the 3 buttons so that users can make for themselves vowels that they want to input. The preference on the consonants layout was different according to investigation methods. According to the survey, it was preferred that consonants were arranged by alphabet order. However, the result of text entry speed measurement was that the arrangement by alphabet order was not superior to the typical arrangement. Such results may be used to design mobile phones for diverse users.