• Journal of Korean society of Dental Hygiene
• /
• v.15 no.3
• /
• pp.451-459
• /
• 2015

Objectives: The objective of this study is to investigate oral health behavior, PHP index and OHIP, awareness, attitude and behavior toward oral health in the foreign factory workers. Thsi study will provide the basic data for the improvement of the foreigners' quality of life. Methods: A self-reported questionnaire was completed by 126 Sri Lankans and 76 Chinese over 20 years old in Daegu and Gyeongbuk from January to April, 2012 through man to man interview after receiving informed consent. The questionnaire included oral health status, PHP index and OHIP. Results: OHIP was closely related to sex, marital status, and medical expense burden. PHP index was closely related to religion and income. The averages of OHP and PHP were 4.36 and 3.7, respectively and very bad. OHIP was influenced by number of toothbrushing, time of toothbrushing, use of oral hygiene device, and dental visit within a year. PHP index was influenced by the area of toothbrushing, time of toothbrushing, and the dental visit within a year. Regression analysis of PHP index according to OHIP and oral care conditions showed the equation. Y(OHIP)=2.999+0.103(area of toothbrushing)+0.346(the use of oral hygiene article)+ 0.077(visiting to the dentist during the past one year)-0.173(PHP index)(p<0.05). Conclusions: Low PHP index in the foreign workers affected quality of life. So the company must provide the continuing oral health care for the foreign workers every year. The concern for the health care for the foreigners will improve oral health behavior in the future.

• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.45 no.6
• /
• pp.18-26
• /
• 2008

In this paper, dynamic GTS scheduling method based on IEEE 802.15.4 is proposed for wireless control system considering reliability and real-time property. The proposed methods can guarantee a transmission of real-time periodic and sporadic data within the limited time frame in factory environment. The superframe of IEEE 802.15.4 is used for the dynamic transmission method of real-time mixed traffic (periodic data, sporadic data, and non real-time message). By separating CFP and CAP properly, the periodic, sporadic, and non real-time messages are transmitted effectively and guarantee real-time transmission within a deadline. The simulation results show the improvement of real-time performance of periodic and sporadic data at the same time.

• Journal of Fashion Business
• /
• v.6 no.5
• /
• pp.72-86
• /
• 2002

Recently the fashion design has been expressed mixing trend of antipodal concept. There are shown disorganization of existing standard with eclectism, pursued more sensational fashion by the sense of unease. And there are spreaded body exposure in producing on a commercial scale for sex, are shown the phenomenon by wearing innovation inner-wear in private area are exposed out. The purpose of this study are to consider preponderantly the fashion design using corset, shown up as the motive of costume design from 1990's to 2002's, define the character of molding. and extend the width of understanding of modern fashion. The results of the study are as follows: 1. The trend of deconstructionism as one line of fashion world in the 1990's make into outer garment of inner-wear, corset has been using the main item of infra costume. The past corset was existed innerwear, but it is revived various forms by transforming outer garment of body expression consciously. 2. Corset look is shown double faced factory of the beauty of tradition and decadence, vulgarity and nobility, concealment and exposure, and are expressed boldly the free consciousness outer about woman's sex with the improvement of woman's social position. 3. The molding character of Corset look divided Eroticism, Fetishism, Deconstructionism. Futurism. The trend of Corset look design is the emphasized sexual part of lace-up and cutting line of corset, and various details of see-through, kitsch, glitter look. Therefore, the trend of Corset look will be applied the modern fashion and used as motif of new design, affected the inspiration of more developed design with grafting of up-to-date fabrics and processing technique.

• Journal of Korean Society of Rural Planning
• /
• v.19 no.1
• /
• pp.23-32
• /
• 2013

In the traditional subsistence farming era in Korea, most of small farmer's housing plots in the rural villages had their boundary barriers of which materials being the natural ones provided from nearby places. However, during the rapid industrialization period from 1960s, a traditional type of boundary barriers in the rural villages had been replaced mostly by low-cost factory-made ones, which means absolute loss of their amenity values as a linear part of villagescape. In spite of many study efforts on boundary barriers of traditional rural houses, detailed historical dating on them after 1960s have not tried up to now, which provoked to try this study. Through the direct and in-depth interviews to rural villagers sampled from 21 case villages, it was found that original boundary barriers structure in most of farm houses was made of natural materials like stone, soil, trees and bamboo, but, replaced by cement block structures mostly during Saemaeul Project period. However, although being relatively minority, traditional ones have been preserved up to now mainly in remote mountainous and seashore villages, but was in very low condition. In the overall view, for more than half a century, boundary barriers of farm houses had been left without public or private improvement efforts. In order to enhance their amenity values, more research works should be carried out on positive reassessment of the traditional ones harmonized with multifunctionalities for modern village life.

• Land and Housing Review
• /
• v.5 no.4
• /
• pp.305-314
• /
• 2014

The technology-intensive unit modular method of factory production method is attracting attention by the limit of the labor-intensive and field centered wet construction method. In recent years, the unit modular method has been applied to the construction of schoolhouse and BOQ(bachelor offices' quarters), dormitories, etc. But the modular method still is not used in housing construction by the lack of verification of resident performance and construction cost. Therefore, this study analyzed the economics of modular house to vitalize the constructed residential building by modular method and to develop the modular method. According to the study results, the construction cost of the modular house was analysed more about 6.2% expensive than that of the existing housing. However, if the construction duration of modular house is shortened or the productivity of modular house is increased, the construction cost of modular house will be similar to the that of the existing house.

• Journal of Engineering Education Research
• /
• v.3 no.2
• /
• pp.3-13
• /
• 2000

The paper has analyzed and summarized about the theoretical problem occurred in the CAQC, and has developed the learning model focused on the histogram as a case study. The range of study is to systematize the basic method of histogram generally used, and to make step by step procedures under the interactive relation with the improvement of the theory that must be added in case of the calculation by the aided of MS-Excel software. A histogram is the theory to understand the population distribution from which samples are extracted, so alternative methods are presented to estimate the population shape through an experiment and a practice. In order to enlarge the application area of the histogram in the factory, the theory of normal test, the criteria of process capability index and the probability calculation of PPM are added to the histogram. The learning model of CAQC education is proposed that is consistent with the target of histogram to control and search the cause of item defectives fast and correctly.

• Journal of Engineering Education Research
• /
• v.11 no.3
• /
• pp.33-43
• /
• 2008

In this paper, mechatronics education in South Korea is analyzed and its improvement is proposed. For this purpose, discussion on the definition and evolution of mechatronics in South Korea, USA and EU is deployed first. It is revealed that most of the mechatronics education in USA and EU is remained in cross-disciplinary stage or curriculum stage, whereas that in South Korea is evolved to curriculum stage or organizational stage. The comparison of mechatronics curriculum between Korea and other countries and the problems of mechatronics education are included. The automation of machinery and factory plays one of major roles in mechatronics education in Korea, while mechatronics curriculum in USA and EU does not emphasize the automation. Mechatronics experiment in South Korea is organized to meet the National Qualification Test on mechatronics, and it is recommended to be more inventive. The way of improving the National Qualification Test of South Korea on mechatronics field is proposed. And, finally, efficient way of linking technical high school and university in mechatronics education is also proposed.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.43 no.1
• /
• pp.143-150
• /
• 2020

To enhance the effectiveness of the FMS (flexible manufacturing system), it is necessary for the manufacturing control system to be upgraded by integrating the cyber and the physical manufacturing systems. Using the CPPS (Cyber-Physical Production System) concept, this study proposes a 4-stage vertical integration and control framework for an aircraft parts manufacturing plant. In the proposed framework, the process controller prepares the operations schedule for processing work orders generated from the APS (advanced planning & scheduling) system. The scheduled operations and the related control commands are assigned to equipments by the dispatcher of the line controller. The line monitor is responsible for monitoring the overall status of the FMS including work orders and equipments. Finally the process monitor uses the simulation model to check the performance of the production plan using real time plant status data. The W-FMCS (Wing rib-Flexible Manufacturing Control & Simulation) are developed to implement the proposed 4-stage CPPS based FMS control architecture. The effectiveness of the proposed control architecture is examined by the real plant's operational data such as utilization and throughput. The performance improvement examined shows the usefulness of the framework in managing the smart factory's operation by providing a practical approach to integrate cyber and physical production systems.

• Management & Information Systems Review
• /
• v.6
• /
• pp.227-266
• /
• 2001

These days the use of personal computer has become generalized at factory, office, house, etc and this fact indicates that visual display terminal work became popular in every field of our society. The use of computer improves work efficiency, productivity & qualify but in addition, it also generated the physical and mental diseases or defects so called VDT syndrome to workers. The purpose of this paper is to analyse the computer-work-related anti-physical, anti-psychogenic symptoms & side effects through the data drawn from workers who use computers on their works, and to find out methods of improvement & humanization of computer works. The follows are the results of questions about personal sensibility of VDT syndrome. 1. Female workers are more sensitive to the side effects of computer labor than males. 2. Workers aged twenties feel more severe symptoms of VDT syndrome than thirties or fourties, but there are no level of significance. 3. Middle managements workers are the most sensitive group to VDT syndrome, on the other hand tow managements are less sensitive than operators. 4. The result of questions indicates that a phone conductress show more severe VDT syndrome symptoms than business affairs or an engineer workers, with level of significance. 5. The longer computer work engagement period, the more evident VDT syndrome symptoms appear. For instance, workers who have more than 2 year engagement period complain more severe symptoms, compared workers who have less than 2 year engagement period. 6. Long computer working time per day also increases VDT syndrome severity specially people who have more than 2 hours in working time in a day have much less severe symptoms, compared people whose daily working time exceeds 2 hours. 7. Specific body part which shows VDT syndrome symptoms is shoulder, wrist, neck, finger, eye, waist, arm in the order of severity. 8. Sensibility of VDT syndrome symptoms have effect on degree of vocational satisfaction.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.18 no.9
• /
• pp.2313-2321
• /
• 2014

A concentration meter is widely used at purification plants, sewage treatment plants and waste water treatment plants to sort and transfer high concentration sludge and to control the amount of chemical input. This study has been prepared for improving efficiency of operation on sludge processes and to establish a basic for factory automation by accuracy improvement and problem solution of sludge concentration meter. The concentration meter's accuracy and stability is improved by applying multi-beam sensors and minimum deviation linear average filtering. Furthermore maintenance without cut-off of water in sludge operation is possible by detachable sensors. The performance of multi-beam concentration meter has been variously verified by the pilot plant experiment.