• Title/Summary/Keyword: 건조시설

Search Result 254, Processing Time 0.028 seconds

A Cost Model for an Activity in Ship Production (선박 건조의 생산단위에 대한 Cost Model)

  • Jeong-Je Kim
    • Journal of the Society of Naval Architects of Korea
    • /
    • v.28 no.1
    • /
    • pp.197-205
    • /
    • 1991
  • A methodology of constructions a mathematical cost model for an activity constituting ship hull assembly process is proposed. The relationship between number of workers and processing time required for an activity can be formulated using an work study method, then manhours and shop floor area-hours required are calculated accordingly. The costs for unit manhour and unit shop floor area-hour respectively are calculated by distributing the overall annual cost of the company to the overall production resources consummed during the year. A general procedure of implementing the methodology has been demonstrated through a test on an exampled activity drawn from a real process.

  • PDF

Structural response monitoring system of large floating structures (대형 부유구조물의 구조응답 모니터링 시스템)

  • 김재동
    • Bulletin of the Society of Naval Architects of Korea
    • /
    • v.33 no.4
    • /
    • pp.67-75
    • /
    • 1996
  • 일찌기 20세기 초반부터 지구의 마지막 남은 자원의 보고로서 또한 미래의 생화공간으로서 해양에 대한 관심이 고조되어 왔다. 해양의 에너지/광물 자원의 개발을 위한 노력은 이미 1950년대 부터 시작되어 상당한 가시적인 성과를 얻고 있다. 최근에는 특히 환경보존에 대한 관심이 고조됨에 따라 육상기피시설물(공항, 폐기물 처리시설, 원자력 발전설비 등)들의 부지확보 문제를 해결하기 위하여 해양공간을 활용하는 방안이 선진각국에서 연구되고 있으며, 그중 가장 타당성이 높은 방안의 하난로서 각종 생산활동을 위한 플랜트를 대형 부유구조물 위에 설치하는 해상플랜트(Barge Mounted Plant, BMP)가 제안되고 있다. 원자력 발전설비를 비롯한 대형 프랜트를 부유구조물 위에 설치할 경우, 지진의 영향을 극소화 할 수 있다는 장점이 있으나 해상의 파도, 조류, 바람, 일사에 의한 갑판의 열변형 등 불규칙적인 환경하중에 노출되므로 이러한 환경조건하에서 구조물이 설계 수명 동안 안전하게 기능을 다할 수 있는지를 세심하게 검토할 필요가 있다. 따라서 BMP의 안전성 평가방법에 대한 신뢰도를 높이고 평가결과에 대한 합리성을 제고하는 한편, 이를 바타응로 현재까지는 설계/건조 경험이 전무한 초대형 부유구조물의 구조설계와 관련된 기초기술 및 응용기술을 확보하는 문제는 가장 시급히 해결되어야 할 부분이다.

  • PDF

Development of LTE based Agent for Shipyard USN Service (조선소 USN 서비스를 위한 LTE 기반 에이전트 개발)

  • Kim, Tae Yong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2013.10a
    • /
    • pp.69-70
    • /
    • 2013
  • Through shipbuilding industry and IT convergence, high effiency of production facilities and process will be achieved. Using LTE based communicator, variable sensing data obtained from shipyard cabe be transmitted to central server. This agent system can be applied to total monitoring, sail test, and accident prevention, etc.

  • PDF

A Study on the Affordence of Built Environment and the Life Satisfaction of the Elderly Residents at Welfare Facilities (양로시설 입소노인의 생활만족도 향상을 위한 건조환경의 지원성에 관한 연구)

  • Kim, Gab-Dong;Park, Jae-Seung
    • Journal of The Korea Institute of Healthcare Architecture
    • /
    • v.6 no.10
    • /
    • pp.7-14
    • /
    • 2000
  • The aim of this study is to derive design guidelines which improve the life satisfaction of elderly residents at welfare facilities. There are many factors affecting on satisfaction with life of the institutionized elderly, but this study focuses on architectural factors. So, two factors are derived, the first factor is the behavier facilitation and the second is the social-interaction. In this study, the behavier facilitation, which was considerd by elderly's physical feature, means safety, discrimination and adaptability. The social interaction, which was considerd by elderly's psychological feature, was supported by homogeneous, approximate, privacy, territoriality, personalization, and control.

  • PDF

Evaluation of storage effects for hydrologic design of sand dam (모래저장형댐의 수문학적 설계를 위한 저류효과 평가)

  • Chung, Il-Moon;Lee, Jeongwoo
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2019.05a
    • /
    • pp.219-219
    • /
    • 2019
  • 모래저장형댐(sand dam)은 계곡이나 하천을 가로질러 보를 설치하고 확보된 공간을 모래와 같은 공극이 큰 투수성 재료로 채운 후 그 채움재 안에 물을 저장하는 구조물로서 증발량이 큰 건조지역에서 수자원 확보 수단으로 널리 이용되고 있다(Hanson and Nilsson, 1986). 국내에서는 차수 및 저류를 위한 제체를 지하 땅속에 설치한 지하수댐을 운영하거나 사방댐을 소규모 수자원공급시설로 개조하여 활용한 일부 사례가 있으나, 전형적인 모래저장형댐의 설계, 시공, 운영 사례가 전무하다. 본 연구에서는 A지역을 대상으로 모래저장형댐의 저류용량을 설계하고 수자원 확보효과를 분석하기 위해서 유역수문모형 SWAT으로 모의한 장기유출량과 방류구, 위어 등을 고려한 저수지 유출추적을 수행하였다. 모래저장형댐의 형태, 규모, 취수량, 지형조건, 수문학적 조건 등에 따른 댐내 수위, 저류량, 방류량 등의 변화를 분석하여 설치 부지에 대한 적정 설계 인자를 도출하였다. 또한 평시 및 가뭄시 물공급 효과와 유황개선 효과를 정량적으로 분석, 제시하였다.

  • PDF

Studies on the Kiln Drying Characteristics of Several Commercial Woods of Korea (국산 유용 수종재의 인공건조 특성에 관한 연구)

  • Chung, Byung-Jae
    • Journal of the Korean Wood Science and Technology
    • /
    • v.2 no.2
    • /
    • pp.8-12
    • /
    • 1974
  • 1. If one unity is given to the prongs whose ends touch each other for estimating the internal stresses occuring in it, the internal stresses which are developed in the open prongs can be evaluated by the ratio to the unity. In accordance with the above statement, an equation was derived as follows. For employing this equation, the prongs should be made as shown in Fig. I, and be measured A and B' as indicated in Fig. l. A more precise value will result as the angle (J becomes smaller. $CH=\frac{(A-B') (4W+A) (4W-A)}{2A[(2W+(A-B')][2W-(A-B')]}{\times}100%$ where A is thickness of the prong, B' is the distance between the two prongs shown in Fig. 1 and CH is the value of internal stress expressed by percentage. It precision is not required, the equation can be simplified as follows. $CH=\frac{A-B'}{A}{\times}200%$ 2. Under scheduled drying condition III the kiln, when the weight of a sample board is constant, the moisture content of the shell of a sample board in the case of a normal casehardening is lower than that of the equilibrium moisture content which is indicated by the Forest Products Laboratory, U. S. Department of Agriculture. This result is usually true, especially in a thin sample board. A thick unseasoned or reverse casehardened sample does not follow in the above statement. 3. The results in the comparison of drying rate with five different kinds of wood given in Table 1 show that the these drying rates, i.e., the quantity of water evaporated from the surface area of I centimeter square per hour, are graded by the order of their magnitude as follows. (1) Ginkgo biloba Linne (2) Diospyros Kaki Thumberg. (3) Pinus densiflora Sieb. et Zucc. (4) Larix kaempheri Sargent (5) Castanea crenata Sieb. et Zucc. It is shown, for example, that at the moisture content of 20 percent the highest value revealed by the Ginkgo biloba is in the order of 3.8 times as great as that for Castanea crenata Sieb. & Zucc. which has the lowest value. Especially below the moisture content of 26 percent, the drying rate, i.e., the function of moisture content in percentage, is represented by the linear equation. All of these linear equations are highly significant in testing the confficient of X i. e., moisture content in percentage. In the Table 2, the symbols are expressed as follows; Y is the quantity of water evaporated from the surface area of 1 centimeter square per hour, and X is the moisture content of the percentage. The drying rate is plotted against the moisture content of the percentage as in Fig. 2. 4. One hundred times the ratio(P%) of the number of samples occuring in the CH 4 class (from 76 to 100% of CH ratio) within the total number of saplmes tested to those of the total which underlie the given SR ratio is measured in Table 3. (The 9% indicated above is assumed as the danger probability in percentage). In summarizing above results, the conclusion is in Table 4. NOTE: In Table 4, the column numbers such as 1. 2 and 3 imply as follows, respectively. 1) The minimum SR ratio which does not reveal the CH 4, class is indicated as in the column 1. 2) The extent of SR ratio which is confined in the safety allowance of 30 percent is shown in the column 2. 3) The lowest limitation of SR ratio which gives the most danger probability of 100 percent is shown in column 3. In analyzing above results, it is clear that chestnut and larch easly form internal stress in comparison with persimmon and pine. However, in considering the fact that the revers, casehardening occured in fir and ginkgo, under the same drying condition with the others, it is deduced that fir and ginkgo form normal casehardening with difficulty in comparison with the other species tested. 5. All kinds of drying defects except casehardening are developed when the internal stresses are in excess of the ultimate strength of material in the case of long-lime loading. Under the drying condition at temperature of $170^{\circ}F$ and the lower humidity. the drying defects are not so severe. However, under the same conditions at $200^{\circ}F$, the lower humidity and not end coated, all sample boards develop severe drying defects. Especially the chestnut was very prone to form the drying defects such as casehardening and splitting.

  • PDF

Methods of Incorporating Design for Production Considerations into Concept Design Investigations (개념설계 단계에서 총 건조비를 최소로 하는 생산지향적 설계 적용 방법)

  • H.S.,Bong
    • Bulletin of the Society of Naval Architects of Korea
    • /
    • v.27 no.3
    • /
    • pp.131-136
    • /
    • 1990
  • 여러해 전부터 선박의 생산실적이나 생산성 관련 자료를 기록하고 보완하는 작업을 꾸준히 개선토록 노력해온 결과중 중요한 것 하나는, 선박의 여러 가지 설계 검토과정에서 충분히 활용할 수 있는 함축성 있고 믿을만한 형태의 생산정보를 제공해줄 수 있게 되었다는 것이라고 말 할 수 있겠다. 이러한 자료들은 생산계획상 각 단계(stage)에서의 작업량, 예상재료비와 인건비의 산출등이 포함될 수 있으며, 선박이나 해상구조물의 전반적인 설계방법론(design methodology)을 개선코자 한다면 ''생산지향적 설계(Design for Production)''의 근간이 되는 선박건조전략(build strategy), 구매정책(purchasing policy)과 생산기술(production technology)에 대한 폭넓은 지식이 한데 어우러져야 한다. 최근에는 CIMS의 일부분에서 보는 바와 같은 경영관리, 설계 및 생산지원 시스템의 도입으로 이와 같은 설계 프로세스의 추진을 가능케하고 있다. 이와 병행하여 설계를 지원하기 위한 전산기술, 특히 대화형 화상처리기술(interactive graphics)의 발달은 설계자가 선박의 형상이나 구조 배치를 여러 가지로 변화시켜 가면서 눈으로 즉시 확인할 수 있도록 설계자의 능력을 배가시키는데 크게 기여하고 있다. 여러 가지의 설계안(alternative design arrangement)을 신속히 만들어내고 이를 즉시 검토 평가할 수 있는 능력을 초기설계 단계에서 가질 수 있다면 이는 분명히 큰 장점일 것이며, 더구나 설계초기 단계에 생산관련인자를 설계에서 고려할 수 있다면 이는 더욱 두드러진 발전일 것이다. 생산공법과 관련생산 비용을 정확히 반영한 각 가지의 설계안을 짧은 시간내에 검토하고 생산소요 비용을 산출하여 비교함으로써, 수주계약단계에서 실제적인 생산공법과 신뢰성있는 생산실적자료를 기준으로 하여 총 건조비(total production cost)를 최소로 하는 최적의 설계를 선택할 수 있도록 해 줄 것이다. 이제 이와 같은 새로운 설계도구(design tool)를 제공해 주므로써 초기설계에 각종 생산관련 정보나 지식 및 실적자료가 반영가능토록 발전되었다. 본 논문은 영국의 뉴카슬대학교(Univ. of Newcastle upon Type)에서 위에 언급한 특징들을 반영하여 새로운 선박구조 설계 방법을 개발한 연구결과를 보여주고 있다. 본 선계연구는 5단계로 구분되는데; (1) 컴퓨터 그라픽스를 이용하고 생산정보 데이타베이스와 연결시켜 구조형상(geometry)을 정의하고 구조부재 칫수(scantling) 계산/결정 (2) 블럭 분할(block division) 및 강재 배치(panel arrangement)의 확정을 위해 생산기술 및 건조방식에 대한 정보 제공 (3) 상기 (1) 및 (2)를 활용하여 아래 각 생산 단계에서의 생산작업 분석(work content assessment) a) 생산 준비 단계(Preparation) b) 가공 조립 단계(Fabrication/Assembly) c) 탑재 단계(Erection) (4) 각각의 설계(안)에 대하여 재료비(material cost), 인건비(labour cost) 및 오버헤드 비용(overhead cost)을 산출키 위한 조선소의 생산시설 및 각종 품셈 정보 (5) 총 건조 비용(total production cost)을 산출하여 각각의 설계안을 비교 검토. 본 설계 방식을 산적화물선(Bulk Carrier) 설계에 적용하여 구조배치(structural geometry), 표준화의 정도(levels of standardisation), 구조생산공법(structural topology) 등의 변화에 따른 설계 결과의 민감도를 분석(sensitivity studies)하였다. 전산장비는 설계자의 대화형 접근을 용이하도록 하기 위해 VAX의 화상 처리장치를 이용하여 각 설계안에 대한 구조형상과 작업분석, 건조비 현황 등을 제시할 수 있도록 하였다. 결론적으로 본 연구는 설계초기 단계에서 상세한 건조비 모델(detailed production cost model)을 대화형 화상 처리방법에 접합시켜 이를 이용하여 여러가지 설계안의 도출과 비교검토를 신속히 처리할 수 있도록 함은 물론, 각종 생산 실적정보를 초기설계에 반영하는 최초의 시도라고 믿으며, 생산지향적(Design for Production) 최적설계분야의 발전에 많은 도움이 되기를 기대해 마지 않는다. 참고로 본 시스템의 설계 적용결과를 부록에 요약 소개하며, 상세한 내용은 참고문헌 [4] 또는 [7]을 참조 요망한다.

  • PDF

Comparison of Climatic Conditions of Sweet Pepper's Greenhouse between Korea and the Netherlands (한국과 네덜란드의 파프리카 재배온실의 시설 내.외부 기상환경 비교)

  • Jeong, Won-Ju;Myoung, Dong-Ju;Lee, Jeong-Hyun
    • Journal of Bio-Environment Control
    • /
    • v.18 no.3
    • /
    • pp.244-252
    • /
    • 2009
  • This research aims at comparison of climatic conditions of sweet pepper's greenhouse between Korea (KOR) and the Netherlands (NL) to find out the reason of much lower yield in KOR than NL focus-ing on greenhouse climatic conditions. Hence, greenhouse climate data were obtained from each one commercial glasshouse in both countries. The crops (cv. 'Derby') were grown on rockwool slab with two stems per plant with 3.75plants/$m^2$ in KOR and three stems per plant with 2.5plants/$m^2$ or four stems per plant with 1.875plants/$m^2$ in NL. Even though plant density was differed but stem density was on the same to 7.5stems/$m^2$. There was no significantly difference on weekly growth of sweet pepper plant both countries, whereas harvested nodes to whole nodes of NL's plant was more than two times higher compared to KOR. The averaged daily global radiation during the whole growing periods was 14.5MJ/$m^2$/day in KOR and l2.1MJ/$m^2$/day in NL. Averaged 24h temperature was similar to both glasshouse as $21.6^{\circ}C$ in KOR and $21.2^{\circ}C$ in NL during the whole growing periods, however the variance was higher in KOR than NL. Humidity deficit (HD) was observed higher in KOR during the whole growing periods. Averaged day $CO_2$ concentration was measured contrary pattern in both countries because of heating to greenhouse on NL winter season. Averaged 24h temperature and day $CO_2$ concentration to daily global radiation was regular pattern in NL, whereas there are large scatter in KOR. Consequently, more irregular greenhouse climate condition in KOR could be induced irregularly crop growth.

Oral health-related quality of life in social welfare workers according to oral health status (일부 사회복지시설 종사자의 구강건강상태에 따른 구강건강관련 삶의 질)

  • Song, Ae-Hee;Youn, Hye-Jeong;Lim, Sun-A
    • Journal of Korean society of Dental Hygiene
    • /
    • v.16 no.2
    • /
    • pp.277-284
    • /
    • 2016
  • Objectives: The purpose of the study was to investigate the influencing factors of oral health-related quality of life in social workers. Methods: A self-reported questionnaire was completed by 240 social workers in Gwangju by convenience sampling method. The questionnaire consisted of general characteristics of the subjects(age, monthly salary, smoking, alcohol consumption) and systemic health condition(systemic diseases, medication, oral health status, and stress). The factors associated with oral health-related quality of life included skin dryness, eye dryness, lip dryness, and nasal dryness. The subjective dry mouth consisted of 6 questions measured by visual analogue scale(VAS). Cronbach's alpha was 0.868 in the study. The data were analyzed for t-test, one-way ANOVA and multiple regression analysis using SPSS 18.0 program. Results: The oral health-related quality of life in social workers varied by age, oral health status, stress status, and halitosis. The oral health-related quality of life had positive correlations with the subjective perception of dry mouth and whole body dry symptoms. The health status(${\beta}=-0.410$) had the influence on the oral health-related quality of life, nasal dryness(${\beta}=0.230$), age(${\beta}=0.189$), and halitosis (${\beta}=0.162) in order. Conclusions: The oral health-related quality of life was closely related to the health status and nasal dryness. It is necessary to develop the quality of life improvement programs including oral health prevention and care program in the social workers.

A Study on Indoor Air Quality in new Ship (새로 건조된 선박의 실내공기환경 조사 연구)

  • Doe, Geun-Young;Lee, Han-Seok;Lee, Yun-Gyu;Lee, Hyong-Ki
    • Journal of Navigation and Port Research
    • /
    • v.31 no.5 s.121
    • /
    • pp.427-434
    • /
    • 2007
  • Indoor air pollution has been a critical issue as a new environmental problem and a significant amount of research has been performed on the indoor air pollution in buildings as well us those in mean of transport such as automobiles, subways, and buses. The actual condition of indoor air pollution in ships, however, was not investigated. Because airtightness of a ship is very higher than a general building and the crew spend almost all the time in indoor space of the ship during underway, indoor air quality(IAQ) of the ship is very important for their comfortableness and health. In this paper, indoor air quality of a new ship is measured and analyzed for the improvement of IAQ in ships.