• 한국건축시공학회지
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• 제9권3호
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• pp.95-101
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• 2009

Constructing large-scale mat foundation mass concrete is increasing for the stability of building structure, because a lot of high rise building are being built in order to make full use of limited space. However, It is of increasing concerns that because limited placing equipments, available job-site and systems for mass concete placement in construction field do not allow to place great quantity of concrete at the same time in large scale mat foundation, consistency between placement lift can not be secured. And also, it is likely to crack due to stress caused by the difference of hydration heat generation time. To find out the solution against above problems, this study is to reconfirm the performance of normal concrete designed by mix proportion and super retarding concrete. The Fundamental test shows what happens if low heat proportioning and control method of setting time are applied at the job-site of newly constructed high rise building. The test result show that slump flow of concrete has been somewhat increased as the target retarding time gets longer, while the air content has been slightly decreased but this is no great difference from normal concrete. The setting time shows to be retarded as target retarding time gets longer, the range of retarding time increases. It is necessary to increase the amount of mix of super retarding agent in the proportion ration by setting curing temperature high since outdoor curing is about 6 hours faster than standard curing, which means the temperature of the concrete will be higher than the temperature of the surrounding environment, due to its high hydration heat when applying in a construction site. The compressive strength of super retarding concrete appears to be lower than normal concrete due to the retarding action in the early stage. However, as the time goes by, the compressive strength gets higher, and by the 28th day the strength becomes the same or higher than normal concrete.

• 한국멀티미디어학회논문지
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• 제3권4호
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• pp.407-415
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• 2000

설비 집약적이며 복잡한 생산 시스템중의 하나인 반도체 FAB 공정은 제품의 흐름시간과 대기시간, 공정 중 재고를 줄이는 것이 흐름제어의 가장 중요한 목표이다. 이에 본 연구에서는 소품종 다랑 생산 시스템에서 발생하는 비경제성을 줄이고 생산성을 향상시키기 위하여 현재 반도체 양산 회사에서 주로 채택하고 있는 In-Line Layout을 분석하고 새로운 제안 방식인 그룹테크놀로지를 이용한 Job Shop 형태의 Stand Alone Layout과 함께 각각의 모델로 구축하고 시뮬레이션 함으로써 일별 생산 계획상의 회수 변화에 따른 각Layout의 특성을 비교, 분석하였다. 이 때 사용한 시뮬레이션 툴은 모델 구축 및 시뮬레이션이 용이하고 범용적인 (이산형 제조 시스템용) ProSys를 사용하였다. 연구 결과로는 일별 생산 계획상의 회수 초기에는 In-Line Layout이 Stand Alone Layout보다 대체로 생산량 측면에서 우세하지만 일별 생산계획상의 회수가 증가된 14회부터는 Stand Alone Layout이 더 우세한 것으로 나타났다

• 디지털융복합연구
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• 제19권4호
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• pp.33-38
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• 2021

'데이터 경제(Data Economy)'의 기폭제 역할을 한 코로나시대를 맞이하여 모든 일상은 디지털 형태로 급속하게 전환되고 있다. 디지털 데이터의 양과 질적은 급속하게 증가하고 있다. 국내 데이터 산업은 다양한 데이터 인력이 필요하지만, 양질의 데이터 인력은 여전히 부족한 실정이다. 수요가 많은 데이터 인력은 개발 인력이지만, 데이터 산업의 부가가치를 높이기 위해서 데이터 비즈니스 인력이 필요하다. 데이터 비즈니스 인력 중에서 높은 핵심적인 가치를 창출하는 데이터 트레이드 매니저의 역할이 주목받고 있다. 본 연구는 데이터 트레이드 메니저의 직무 정의, 필요한 지식 및 기술, 양성 교육 과정에 필요한 교육 내용 등을 델파이 연구를 통해서 도출한다. 연구 결과의 유효성을 파악하기 위하여 전문가와 직업 수요자를 대상으로 데이터 트레이드 메니저의 직업 안착 가능성을 검증한다. 본 연구는 데이터 인력 양성에 근거가 되는 교육 모델의 이론적 근거로 활용될 수 있고, 향후 인력 양성 정책 수립에 활용될 수 있다.

• 패션비즈니스
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• 제12권1호
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• pp.1-15
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• 2008

This study aims to consolidate the qualitative growth of knit design thru the creation of high value-added brand and design, in the state of active trend for competitive promotion of professional knit brand, by collapsing the border line between the knitwear market and the woven one. In accordance with the market situation of increasing a demand of knitwear products, I wish to awaken the importance of knit design thru this study, to survey domestic knit brand products and their planning directions and to plan for the high value-added knitwear products, thru presenting the problems of knit industry and developing knitwear design. This study is focused on showing process of planning and items developed personally by me in charge of developing products practically at the job site of knit industry. From the stage of planning for goods, I suggested the 2007 s/s goods of M company as a strategy of distinctiveness caused by the problems with rival companies, and also proposed a method conducted by the actual business. Setting up M company's s/s concept of the year 2007, I suggested a plan of quantity, time of forwarding, color, fabrics, etc. as well as the process and schedule thru order, and based on the above result, I made a planning for 2007 s/s knitwear for middle-aged women.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.335-343
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• 2021

Profit generation is one of the main goals of small- and medium-sized enterprises (SMEs). SMEs have deployed a number of solutions to increase profits, including solutions to improve their financial advantage. The question is how to help SMEs make better and more effective decisions to improve their competitive advantage in order to improve their financial performance. The aim of this research is to examine the impact of competitive advantage on financial performance in small- and medium-sized enterprises (SMEs) in Hanoi. A survey of 120 accountants, sales staff and boards of directors of SMEs was conducted to collect data. Through quantity methodology, we used Cronbach's Alpha, EFA and correlation analysis to determine the relationship between competitive advantage and dependent variable - financial performance. The results showed that the competitive advantage had a positive relationship with financial performance. There is not, statistically, significant difference in the level of financial performance in SMEs in Hanoi in terms of genders and between the mentioned three groups of job descriptions. From the findings, this study suggests several recommendations to improve financial performance such as increase sales and increase profits. The results are considered as a useful reference for establishing policies to attract customers toward sustainable development of firms.

• 한국병원경영학회지
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• 제spc호
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• pp.1-13
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• 2016

In a situation where competition becomes intense, health care organizations constantly strive to provide more services with given personnel and time. While not only the 'quantity' of the services but also the 'quality' becomes increasingly important, various problems that can occur during the 'process' of service provision can be effectively managed by applying the methods of management science. In this study, we introduce the cases where the methods of management science can be applied for the management of health care organizations in Korea and abroad. There are many cases where various scenarios for improving the patients' accessibility to the services and for maximizing the efficient use of limited resources are established, and simulation or basic statistical analysis methods are used to solve the problems more systematically or to develop improvement plans. In this study, several exemplary cases, such as no-show of patients, crowding in the emergency room, prediction of the number of available beds in the intensive care units, nurse scheduling, delay of arrival of patients, and ordering of the proper amount of therapeutic materials, are introduced and discussed. From the perspective of administrators or clinicians, however, it may not be easy to master the methodology that requires considerable mathematical background or apply the theories to practice directly. Therefore, it is suggested that more practical and relatively simple analytical methods should be applied. Also, having a more positive attitude toward improving the current performance (e.g., a belief that 'we can always be better than now'), and paying attention to improving the job satisfaction by addressing problems, with experimental spirit and data-driven decision management.

• The Journal of Asian Finance, Economics and Business
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• 제7권3호
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• pp.235-243
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• 2020

The research aims to examine the impact of leadership style on accountants' commitment with FDI firms in Vietnam based on theory of Bass and Avolio (2004). A survey with 110 accountants in FDI firms was conducted. The total of 110 respondents with full information were used for data entry and analysis. Through quantity methodology, we used Cronbach's Alpha, EFA and correlation analysis to determine the relationship between leadership style and three dependent variables including affective, normative and continuance commitment. The results showed that the leadership style had positive relationships with accountants' commitments. In particular, normative commitment with FDI firms of accountants is the most strongest. In addition, there is no statistically difference in the level of three commitments with FDI firms of accountants for three groups of job description. From the findings, this study suggests several recommendations to improve accountants' commitments such as intellectually stimulating, individualized consideration, inspirational motivation, idealized influence, and idealized influence behavior. The results are considered as a useful reference for establishing policies to attract talent personnel toward to sustainable development of firms. Commitment with the organization is a crucial factor to gain a competitive advantage and guide the success of organizations by satisfying customers, maintaining productivity and efficiency.

• 인간식물환경학회지
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• 제22권5호
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• pp.467-480
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• 2019

Standard estimates are the numerical data of a unit quantity required for construction work such as the amount of materials, manpower, and the use of equipment required and are also a basis to calculate construction costs. Unfortunately, standard estimates for construction have also been used for garden construction these days as no standard estimates for garden construction have been developed or documented until now. As a result, many problems have arisen at garden construction sites since landscape construction and garden construction differ in terms of scope, size, design and construction methods. The purpose of this study was to develop standard estimates for garden construction for proper calculation of the cost of garden construction and to ensure gardens are created following appropriate construction processes. In order to develop standard estimates for garden construction, a preliminary survey was conducted on experts to understand current issues at first. After that, a questionnaire survey was done to examine problems of construction processes and ways of improvement, and on-site inspections were conducted utilizing CCTVs at construction sites to identify the actual amount of manpower required on site. Based on the results of the surveys and on-site inspections, a draft version of standard estimates for 5 types of planting work for garden construction was developed. Developing standard estimates for garden construction will serve as a stepping stone for the transparent and proper compensation for garden construction work, which will not only contribute to addressing issues between consumers and construction companies, but also to the stabilization of market economy and job creation.

• Advances in concrete construction
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• 제6권5호
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• pp.545-560
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• 2018

The ever-increasing cost of natural sand and the environmental impacts of extracting manufactured sand (quarry sand) calls for exploring the potential to use alternative materials as fine aggregates in concrete. Copper slag and ferrous slag are industrial by products obtained from the smelting process of copper and iron respectively. A large quantity of copper slag and ferrous slag end up being disposed as waste in landfills and this poses a serious threat to the environment. Copper slag and ferrous slag have similar physical and chemical properties as natural sand and also exhibit pozzolanic activity. This paper studies the technical feasibility of industrial by-products such as copper slag and ferrous slag to replace the fine aggregate in concrete by evaluating the workability, strength and durability characteristics of concrete. The test results indicate that the strength properties are not affected by 40% or 100% replacement of quarry sand with iron slag or copper slag. However, 40% replacement of quarry sand with iron slag or copper slag in concrete is recommended considering the durability aspects of concrete.

• Journal of Biosystems Engineering
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• 제29권6호
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• pp.487-494
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• 2004

This study was conducted to develope a fertilizer-soil incorporation band tiller for the walking cultivator. Because the mixing of soil and fertilizer in the furrow of dry-field has been done manually, several time, heavy labor and much man power were required for the job. This rotary type implement is developed to substitute this manual operation for soil-fertilizer incorporation. The results of this study are summarized as follows : 1) This implement was composed of tilling device, fertilizer application device, frame and tail wheel device. 2) The revolution of driving wheel was $11\~28\;rpm$, that of application roller was $13\~14\;rpm$ the application rate range per revolution of driving wheel was $4.43\~11.80\;g$g and the application rate range by the working speed and the opening quantity was $84.12\~557.20\;g/min$. 3) The adequate working speed was $0.20\~0.40\;m/s$ and the required minimum width of open furrow was 250 mm.