• 복식
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• 제41권
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• pp.185-206
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• 1998

The purpose of this study was to improve productivity for maximum effects with the present equipments and staff. This study compared and analyzed the mea-sured time by using stop watch method and MTM, which was the new measuring method. The flow and results of this study were as follows: 1. This study investigated the theoretical background the efficiency for production management, and the way of productivity improvement through documentary research. 2. Setting up the standard flow on the experi-mental company production, making out a process chart and measuring the actual working hour. 3. The study measured the allowance time applying work sampling. 4. Each process of the movement analysis was filmed by video to use basic data. 5. MTM analysis was taken by choosing 10 processes from front bodice according to the basic movement of MTM. Through the results, this study exclude unneccesary movements and suggest a method for working ways. 6. Using the actual working hour measured by a stop watch calculated the pitch time and presumed the amount of daily productivity. 7. The result of the work sampling came out as 38% of allowance rate. It was 13% higher than the standard amount of woman's jacket allowance rate, which was 25%. The most influencing factor was work discussion. That was because there were commuication problem of the work way between the operator and leader. More adequate use of flow table and level passing table was needed. There were the problems that inappropriate places and sizes made the distance of movements longer and often needed more adjustment of works and surroundings. To prevent breakdowns equipments check ups were necessary before works. 8. The results of MTM analysis were as follow : the time was reduced 40% than the actual measured time by a stop watch. This was because the leveling of the operator was included in the real calculation. Also, leveling was included in MTM analysis and all the conditions were standarized. Therefore MTM method was a scientidic measuring way of establishing the standard time. The presented method of this study, suggested an ideal method eliminating unneccesary motions, and presented standardization of works. Improvement of working methods, work condition and simplifying motions in each 10 processes reduced the working time from total 656 seconds to 301 seconds. 9. The way and time of working was linked together in the MTM analysis methods. Thus data from MTM help suggest not only establishing standard time but also establishing stan-dard work. Plus it includes various ability for improvements of working ways. So it is an objective method which can be widely used in other work studies. 10. The function of a time study is to determine the amount of work produced with a given method. The work rate is used to establish the cost of labor. The wage of worker must be calculated per unit time which is deter-mined before the time study is made. This study tried to introduce the incentive rule for deciding wages according to the standard time by MTM method.

• 한국산학기술학회논문지
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• 제19권1호
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• pp.136-145
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• 2018

심각한 인력난을 겪은 기업들은 공장을 해결이 쉬운 해외로 이전하거나, 외국인근로자의 고용을 증가시켜 인력난을 해결하고 있다. 건설현장 역시, 그들을 노동자로 고용하여 부족한 인력을 보충하고 있는 등, 외국인근로자에 대한 수요는 시간이 지날수록 점차 더 증가하고 있는 실정이다. 최근 외국인근로자의 국내 건설현장 투입과 관련된 정책은 외국인근로자 투입여부에 대한 논의에서 실질적인 투입실태 및 효율적인 관리방안을 모색하는 방향으로 전환되고 있다. 본 연구는 대상지역 건설현장에 참여하고 있는 외국인근로자의 현황과 투입실태 및 관리자 입장에서 외국인근로자의 문제점을 조사하고, 외국인근로자의 효율적 활용을 위한 개선 방법을 도출하고자 하였다. 본 연구의 진행을 위해서는 사례조사 대상 건설 현장을 찾아 외국인근로자와 내국인근로자(관리자)를 중심으로 외국인 근로자에 대한 실태 관련 설문조사를 실시하였고, 설문대상자를 중심으로 1:1 인터뷰를 추가 진행함으로써 설문의 신뢰성을 확보하고자 하였다. 실태조사를 시행하여 얻어진 자료는 SPSS 분석프로그램을 이용하여 각 항목에 응답 비율을 분석한 후, 분석 기준 항목에 따라 그래프화하여 표현하였다. 그 결과 문제점으로 제도적 차원의 문제, 의사소통의 문제, 기능미숙으로 인한 품질저하와 같은 문제점들이 많이 나타났다. 따라서 본 연구는 외국인근로자의 효율적 활용을 위한 개선방안을 언어 교육, 임금, 고용과 관련된 제도적 차원의 개선 등으로 도출하였다.

• 한국식생활문화학회지
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• 제7권2호
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• pp.97-103
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• 1992

This research was conducted to survey the feeding methods of Korean women. The survey was executed for 355 mothers bringing up a child below 24 months in some part of Seoul in Korea from April to May, 1990. Incidence of breast feeding was 29.1% of the interviewed mothers in Seoul, which showed lower percentages than those of previous surveys. This research proved the major influencing factor generally depended on its mother rather than babies or labor condition. For example, the higher income and the higher educational degree of its mothers, they tended to prefer the bottle feeding to the others. Generally mothers knew the informations of infant nutrition very well, 84.5% of the interviewed mothers in Seoul had the opinion of 'breast feeding is better', but their knowledge actually didn't work. The source of mothers‘ informations on the infant nutrition showed the books and magazines, friend and relatives, grandmother were many by the order. But there were some discrepancies between the actual and needed source of information; i.e. mothers in Seoul mostly(44.8%) wanted to acquire their informations from mass communications. The reason of breast feeding showed 'for baby's health' was the greatest, and then 'immunity of breast milk' and 'baby's emotion' were great by the order, and the reason of bottle feeding showed 'not enough breast milk' was the greatest. There were no problems in feeding attitude and position of breast feeding, but there were problems in feeding volume, consistency of formula milk and feeding position of bottle feeding.

• 대한치과기공학회지
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• 제13권1호
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• pp.79-97
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• 1991

To improve the management of dental laboratory through the research on the actual condition, this study posed questions on 36 dental laboratories. The results are as follows : 1. The establishment of dental laboratory in Chunbuk was increased between in 1980 and 1986. Especially it has been more increased since 1989. According to the proportion of population the number of the dental laboratories in Chunbuk was much more than that of other provinces and took the first place in september 1990. 2. The ratio between the unlicensed dental technician and the licensed was 24.83% and 67.11% each . The former must be replaced by the licensed. And the latter ought to try to improve their culture and technique. 3. Overtime payment must be paid for those who work above eight hours. 4. It takes 5 days at a minimum for the production of dental prosthesis with both stability and esthetics. 5. Every Saturday afternoon, Sunday and national holiday must be free. 6. Bonus must be paid 600% a year at a minimum. The system of retirement allowance should be active. All dental technicians ought to be affliated with their labor union and medica insurance. 7. Such dental restoration as porcelain and crown and bridge prosthesis must by increased to a degree between 30% and 50% at a minimum and the reduction system of charge for a dental technique has to be abolished. 8. The general working conditions of dental laboratory, especially pay and working hour must be improved. 9. To advance the service improvement of dental treatment and the banishment of illegal one, the medical insurance of crown and bridge prosthesis must be generally practised. 10. Ill case of the staff cull:lloyulent of dental laboratory, minimem wage system must be observed. 11. Directing dentist system on the ertablisment of dental laboratory must be abelished or wholly improved.

• Structural Engineering and Mechanics
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• 제86권6호
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• pp.715-730
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• 2023

Broad studies have addressed the issue of structural element damage identification, however, rubber bearing, as a key component of load transmission between the superstructure and substructure, is essential to the operational safety of a bridge, which should be paid more attention to its health condition. However, regarding the limitations of the traditional bearing damage detection methods as well as few studies have been conducted on this topic, in this paper, inspired by the model updating-based structural damage identification, a two-stage bearing damage identification method has been proposed. In the first stage, we deduce a novel bearing damage localization indicator, called element relative MSE, to accurately determine the bearing damage location. In the second one, the prior knowledge of bearing damage localization is combined with sailfish optimization (SFO) to perform the bearing damage estimation. In order to validate the feasibility, a numerical example of a 5-span continuous beam is introduced, also the noise robustness has been investigated. Meanwhile, the effectiveness and engineering applicability are further verified based on an experimental simply supported beam and actual engineering of the I-40 Bridge. The obtained results are good, which indicate that the proposed method is not only suitable for simple structures but also can accurately locate the bearing damage site and identify its severity for complex structure. To summarize, the proposed method provides a good guideline for the issue of bridge bearing detection, which could be used to reduce the difficulty of the traditional bearing failure detection approach, further saving labor costs and economic expenses.

• 한국포장학회지
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• 제26권2호
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• pp.61-69
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• 2020

As post-harvest processes of onions are carried by a 20 kg-net package which results in high-cost and low-efficiency, especially, the insufficient drying and physical damage of onions after harvesting leads to a huge second loss in storage, we had developed a low-cost, high-efficiency post-harvest bulk handling machinery system by collecting onions on a farm using ton-bags, drying with forced air circulation, and sorting/packaging. The post-harvest bulk handling machinery system consisted of 6 devices, and this study designed an automatic feed hopper with a feeding rate control device, an inclined belt conveyor with a two-step chute, and an automatic pallet unloading device for feeding onions into the sorting/packing line. This study also analyzed the performance and control of the total system. The device had 1-ton handling capacity, but the operational condition was set to increase the capacity. The three-step filling method of pallet by the velocity control of the inclined belt conveyor was applied in the post-harvest bulk handling machinery system for the prevention of physical damage. If one worker was set to operate the total system, the time required to complete one palletized load was approximately 5 minutes and 5 seconds. The calculated daily handling capacity was approximately 94 tons, when the daily actual working time was 8 hours. When the developed system was applied to the managerial size of 2,000 ton, the processing cost per ton of the system was decreased by 19.5%, compared with the existing 20 kg-net package-based handling. The developed post-harvest bulk handling machinery system would be a good substitute for the rapid decline and aging of rural labor.

• 대한안전경영과학회지
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• 제18권3호
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• pp.25-31
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• 2016

Occupational Safety and Health Expenses Law in construction industry was enacted in 1988 by the notification of Ministry of Employment and Labor and 22 revisions have been made since. The fact that revisions have been made almost every year since the first enactment shows that Occupational Safety and Health Expenses can effectively prevent construction accidents and the need for revisions to fit the reality has been raised continuously. Despite the construction industry has undergone various internal and external environmental changes, (such as the changes in the safety and health management techniques and the increase in the construction employees' desire for safety) the appropriation standard of Occupational Safety and Health Expenses has been calculated based on the contract price. The construction industry has constantly suggested that the Occupational Safety and Health Expenses be calculated based on the estimated construction expenses since applying the current method doesn't provide enough money to secure the safety. Also because it has become mandatory to hire a health manager since 2015, the lack of Occupational Safety and Health Expenses is expected to get worse. In this study, we will analyze the usage of Occupational Safety and Health Expenses and propose a more practical and realistic change in setting the appropriation standard of Occupational Safety and Health Expenses.

• 한국안전학회지
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• 제32권4호
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• pp.59-65
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• 2017

This study examined the stakeholder cognition of the safety certification marking system by surveying manufacturers, lessors, and users. In addition, among various issues about safety certification marking systems, the improvement of safety certification marking contents was suggested in order to guarantee quality of temporary equipments. The results by statistical method show that it is necessary to increase of users' understanding about the safety certification marking system. In addition, the quality management system of temporary equipments should be introduced to control the actual condition that temporary equipments of various product companies are mixed in a site during removal and reuse processes. For detailed marking contents, it is recommended that a certification mark, an identification number, and the production year should be displayed and the manufacturer name could be selectively presented. Detail informations such as a safety certification number, a product company, a model type or name, a specification, a weight, a product number, and the location of a certification mark should be identified by the identification number.

• 한국콘텐츠학회논문지
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• 제15권4호
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• pp.188-196
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• 2015

경찰에게 과학수사는 수사, 형사, 조사 등 범죄수사의 여러 분야에 도구로서 활용 인식되어 왔기 때문에 지금까지 필요함에도 불구하고 중심적인 역할과 위치를 차지하지 못한 것이 사실이다. 이에 본 연구는 경찰의 과학수사 활동에 대한 중요성을 인식하고, 현재 과학수사에 있어서 관련 현황과 과학수사를 위한 지원수준을 살펴보고 문제점을 검토하였다. 이를 토대로 현실적 한계 속에서 어떠한 방식으로 과학수사 활동의 효율성을 향상시킬 수 있을 것인가를 모색하기 위해 근무제도의 발전방안을 논의하고자 하였다. 현재 경찰의 과학수사 활동이 직면하고 있는 문제점으로는 무엇보다 검거중심의 인력 운영에 따른 만성적인 인력부족 현상이었다. 이에 현실적인 제약 내에서 과학수사요원의 활동을 효율적으로 변화시킬 수 있는 방안을 모색하였다. 첫째, 근무체제의 변화가 필요하며, 중 장기적인 관점에서 지휘체제의 개편으로 광역 과학수사체제의 시행이 필요하다. 둘째, 과학수사의 전문성을 확보할 수 있도록 과학수사 경과의 신설이다. 셋째, 과학수사 특기제도가 개선되어야 한다. 넷째, 과학수사의 역량 강화를 위하여 R&D 조직이 구축되어야 할 것이다.

• 디지털융복합연구
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• 제9권6호
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• pp.295-311
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• 2011

정부는 벤처 인증을 통하여 벤처 기업의 발전을 도모하고 있다. 이를 달성하기 위하여 매 년 '벤처 기업 정밀 실태 조사'를 실시하고 있다. 본 연구는 이 자료를 이용하여 벤처 정책의 효과를 파악하기 위한 목적으로 시작하였다. '벤처 기업 정밀 실태 조사'에 나타난 지원의 효과는 창업활성화, 기술 혁신 도모, 마케팅 능력의 향상, 기업 이미지의 개선, 자금 조달 및 투자, 조세 감면의 이익 등으로 벤처 기업 인증의 효과를 인정하고 있는 것으로 보인다. 그러나 자본과 노동을 기본으로 사용하는 생산 함수를 추정하고, 이를 이용한 매출 함수를 이용하여 벤처 지원의 효과를 보면 실제로 생산과 매출의 증대를 가져오는 것은 자금 조달 및 투자의 용이성만 통계적으로 유의하게 효과를 주는 것으로 나타났다. 또한 기술적 비효율성의 제거에 도움이 되는가를 살펴보았더니 벤처 지원으로 추정된 각 효과는 실제로 기술적 비효율성을 제거하는 것으로 나타났으나 창업의 용이성은 반대로 기술적 비효율성을 오히려 증가시키는 것으로 나타났다.