• 대한조선학회논문집
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• 제52권2호
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• pp.119-124
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• 2015

The purpose of this research is a verification of the current equation for calculating equipment number and a suggesting a method for development of a rational new equation. The equation for calculating equipment number consists of total surface area of a ship that fluid resistance act on. Equipment number determines the specification of anchoring and mooring equipment such as anchor weight, anchor chains length and diameter, the number, length and breaking load of tow lines and mooring lines. The equation for equipment number calculation is basically derived considering x, y components of a wind and current force acting on a ship. But this equation is only based on a tanker, which was main type of ships when the equation was derived. Therefore, verification of the equation is required for other types of ships, such as container carrier, LNG carrier, etc. Therefore, in this research, we find out the equation for equipment number calculation should be revised for other types of ships especially the container carrier, by comparing wind and current force acting on a ship to holding force of an anchor and anchor chains, which are selected based on the equipment number.

• 한국도로학회논문집
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• 제16권4호
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• pp.35-43
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• 2014

PURPOSES: This study provides a methodology for estimating proper number of equipment for ordinary road management works. METHODS: Utilizing a computerized data of record systems (KAMIS) in 18 regional offices, two evaluation indicators were calculated and then normalized for objective comparison. Applied magnifying factor to the outputs, the proper number of equipment can be estimated. RESULTS: As a result, proper number of equipment by regional offices were required 28% more than current conditions. CONCLUSIONS: Using the proposed a methodology, fundamental data for scientific and reasonable strategies can be stored as well as be used for the future plan for budget allocation.

• 경영과학
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• 제34권2호
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• pp.103-113
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• 2017

The artillery is a key element of the ground forces operation during wartime, and the military engineers support the artillery position development operation to support the smooth operation of the artillery. In establishing the artillery position development operation plan, the commander requires more than his intuition to find the best option reflecting a number of elements of the battlefield situation which changes every minute. Moreover, the number of available equipment is smaller than the number of required position developments, and the effective equipment operation becomes essential element of this issue. This study quantified the capability of the available engineering equipment, organized a number of teams enabling equipment to put out the maximum capacity based on the quantified figures, and formed the model which allocates the team to the developing points to minimize the developing time. The goal programming method was applied to resolve the problem. The developed model was applied to compare the total mission duration following the number of teams, the variable for commander's decision, and the result of this study can be used as the quantitative data for commander's decision making process in establishing the artillery position development support operation through effective equipment management.

• 한국정밀공학회지
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• 제20권5호
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• pp.39-39
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• 2003

As the design rules in semiconductor manufacturing process become more and more stringent, the higher degree of planarization of device surface is required for a following lithography process. Also, it is great challenge for chemical mechanical polishing to achieve global planarization of 12” wafer or beyond. To meet such requirements, it is essential to understand the CMP equipment and process itself. In this paper, authors suggest the velocity distribution on the wafer, direction of friction force and the uniformity of velocity distribution of conventional rotary CMP equipment in an analytical method for an intuitive understanding of variation of kinematic variables. To this end, a novel dimensionless variable defined as “kinematic number” is derived. Also, it is shown that the kinematic number could consistently express the velocity distribution and other kinematic characteristics of rotary CMP equipment.

• 한국정밀공학회지
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• 제20권5호
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• pp.29-38
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• 2003

As the design rules in semiconductor manufacturing process become more and more stringent, the higher degree of planarization of device surface is required for a following lithography process. Also, it is great challenge for chemical mechanical polishing to achieve global planarization of 12” wafer or beyond. To meet such requirements, it is essential to understand the CMP equipment and process itself. In this paper, authors suggest the velocity distribution on the wafer, direction of friction force and the uniformity of velocity distribution of conventional rotary CMP equipment in an analytical method for an intuitive understanding of variation of kinematic variables. To this end, a novel dimensionless variable defined as “kinematic number” is derived. Also, it is shown that the kinematic number could consistently express the velocity distribution and other kinematic characteristics of rotary CMP equipment.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제23권2호
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• pp.27-35
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• 2017

Purpose: This study analyzed the status of general hospitals as an expanded concept of medical resources including medical staff and equipment. The purpose of this study is to provide a basic for the feasibility study of the scale and establishment of facility guidelines at the planning stage of general hospitals. Methods: The subjects of this study were limited to general hospitals. The status of medical resources was based on the data of the Health Insurance Review and Assessment Service. The number of beds, doctors, nursing grades and major medical equipment were surveyed in 335 general hospitals. Results: 1) The characteristic of general hospitals varies depending on the number of inpatient beds. To be concrete, there were differences in the number of medical staffs and equipments in general hospitals based on 300 500 800 1,000 beds. 2) As the number of hospital beds increases, the number of medical staff increases more than medical equipment and facilities. Medical equipment and facilities remain constant, even when the number of beds increases. On the other hand, the number of medical staff increased about 1.5 times in each level. Implications: Architectural plans for medical staff should be considered differently depending on the number of beds. In particular, architectural planning and facility guidelines should be applied differently based on 300 and 500 beds.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.39-42
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• 2012

Pusher-Loaded Scrapers are important construction equipment for large earthmoving operations. Production rates of a Pusher-Loaded Scraper vary greatly in accordance with the temperature or elevation, the equipment performance, haul speed, haul-road conditions, the method of loading, and Number of scrapers per one pusher. Determining of most economical scrapers fleet regarding the size of equipment, model name, and number of scrapers demands time-consuming calculation because it needs to reference of varied performance charts or tables and repeat complicated calculation. In this study, decision-making support system for the Optimal Pusher-loaded Scrapers Fleet is suggested for the purpose of calculating easily and handling effectively variables which are changed depend of the work conditions. The prototype of this program is developed using MATLAB. And the Database of Pusher-loaded Scraper embodies Performance chart & Retarder chart, soil properties, and calculation-support table.

• 한국콘텐츠학회논문지
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• 제19권8호
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• pp.79-92
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• 2019

기존의 전산 장비 관리 시스템은 전산실에서 문서로만 관리되던 장비 정보들을 전산화하여 관리할 수 있도록 만들어졌다. 하지만 문서로 정리된 장비들을 전산화하는 것에만 중점을 두다 보니 등록할 수 있는 장비에 한계가 발생하고 필요한 장비를 찾는데 어려움을 겪고 있다. 또한, 등록된 장비가 현재 사용하고 있는 장비인지 확인하는데 불편함을 초래하였다. 본 논문에서는 이와 같은 문제를 해결하기 위해 전산 장비 관리 시스템을 재설계하고 구현한다. 이를 위해 기존 전산 장비 관리 시스템을 전반에 걸쳐 면밀히 분석하였으며 시스템을 사용하는 공무원과 관리업체들의 의견을 반영하여 시스템을 개선할 수 있도록 설계 및 구현하였다. 성능평가에서는 기존 시스템의 장비 등록 수와 장비 검색 정확도를 비교하여 개선된 시스템의 효율성을 입증하였다.

• International Journal of Air-Conditioning and Refrigeration
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• 제11권4호
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• pp.209-217
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• 2003

The term “energy saving is economical” is appropriate for the national view point and for design and assessment of one system, but not appropriate when choosing the system by comparing alternative systems in the early design step. Sometimes, non-energy saving system is more economical than energy saving system because of the price of electricity, gas or oil, which are used for operating the air conditioning system. Therefore, when designing a system, we should consider the efficient alternatives through economic assessment of energy saving method. However, research on non-operating number control of the system is not sufficient because it is more common to use operating number control of the system for most economic assessment of air conditioning systems. For this reason, this research can provide the economic operating number control method as basic design data. The data obtained through analysis of life cycle cost based on amount of yearly energy use, are produced by system simulation of HASP/ACLD/8501 and HASP/ACSS/8502 for six alternative heating$.$cooling systems based on seasonal air conditioning system, which is widely used for medium and large size office buildings in Busan.

• 한국산학기술학회논문지
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• 제20권5호
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• pp.322-333
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• 2019

본 연구의 목적은 과거 14년간 한국 정부가 투자한 연구시설 장비의 구축정보를 기반으로 제조국가별로 기초 분석과학 분야의 연구시설 장비 구축 수와 구축금액 차이를 비교 분석하여 국산연구장비의 시장규모와 시장점유의 수준을 알아보고자 하였다. 2019년 1월 1일을 기준으로 2005년부터 2018년까지 국내에 구축되고, 기초 분석과학 분야에 활용되는 연구시설 장비(구축금액이 3천만원 이상인 주장비 기준) 20,687점의 구성, 장비표준분류, 구축 수, 그리고 구축금액을 제조국가별로 분석하였다. 제조국가별 연구시설 장비 구축 수 차이를 비교 분석하기 위하여 단일표본 카이제곱검정 방법을, 구축금액 차이를 비교 분석하기 위하여 일요인 분산분석 방법과 본페로니 사후검정 분석을 사용하였다. 본 연구결과, 각 제조국가별로 연구시설 장비 구축 수(p<.001)와 구축금액(p<.05)은 통계학적으로 유의하게 차이가 있었으며 특히, 장비표준분류에 따라 국내 기업의 연구시설 장비 점유 규모가 통계학적으로 유의하게 상이하였다(p<.05). 따라서 기초 분석과학 분야에 대한 연구장비 국산화 정책 지원 시, 장비유형 및 구축금액별로 정부의 차별화된 전략과 함께 상이한 정책연구 기획이 필요할 것으로 사료된다.