• Title/Summary/Keyword: 수리형태학

Search Result 162, Processing Time 0.022 seconds

A STUDY REPAIRED JOINT STRENGTH OF COMPLETE DENTURE (의치수리(義齒修理)에 있어 파절접합부(破折接合部)의 조작형태(造作形態)가 의치(義齒)의 결합력(結合力)에 미치는 영향(影響)에 관(關)한 연구(硏究))

  • Lee Woo-Hyun;Heo Seong-Joo;Cho In-Ho
    • The Journal of Korean Academy of Prosthodontics
    • /
    • v.29 no.3
    • /
    • pp.101-110
    • /
    • 1991
  • The purpose of this study was to compare the repaired joint strength among several edge profiles after denture repair. For this study, eight edge profiles were used for repair methods and five self-curing resin brands were used for repair materials. Break away loads were tested after 1 hr., 24 hrs. and 1 week. Instron was used for testing the transverse strength of repaired specimen. The results were as follows. 1. Repaired joint strength was about 35-65% of that of original specimen. 2. Joint strengths of round, inverse knife, inverse rabbit, lap ogee joint were higher tnan that of traditional simple butt joint 3. Joint strength of the simple butt joint was low significant. 4. Joint strengths after 1 hr. specimen were lower than those of 24 hrs. and 1 week specimens in joint strengths. 5. There were no significant differences between 24 hrs. and 1 week specimens in joint strengths. 6. It look more than 24 hours to gain satisfactory physical property after repairing the fractured denture base when self-curing resin was used for repair.

  • PDF

동서 농산물 협력체계 구축 방안

  • Lee, Sang-Hak
    • Journal of Global Scholars of Marketing Science
    • /
    • v.2
    • /
    • pp.1-16
    • /
    • 1998
  • 경남 및 전남지방은 산업에 있어서 농업의 비중이 상대적으로 큰 지역이다. 두 지방의 농업의 특성은 큰 차이는 없으나, 전남 지역이 농가인구, 호당 경지면적이 넓다. 영농 형태별로는 전남 지역이 수도, 전작의 비중이 크며, 경남지역은 과수, 채소, 화훼, 축산 등 소득작목의 비중이 높다. 농업기반에 대하여 보면, 농업진흥 지역비율은 경남 53.7%, 전남 64.8%이며 수리답율은 81.9% 76.1%, 경지정리율은 76.1%, 68.4%로 경남지역이 유리한 기반을 갖고 있다. 작목별 특화도를 보면 경남 지역은 맥류, 서류, 앙파, 마늘, 감, 화훼류 등이 높으며, 전남 지역은 맥류,두류, 마늘, 양파, 감, 참깨 등이 높게 나타나고 있다. 지역내 수급현황을 보면 경남지역은 미곡, 두류, 무, 배추, 고추, 사과, 포도, 복숭아 등이 부족하며, 서류, 마늘, 양파, 배 등이 과잉이고, 전남지역은 대부분이 과잉이며 사과, 포도, 복숭아 등이 부족하다. 지역간 농업협력은 상호 과부족인 농산물의 교역이나 비교우위가 있는 작목에 특화함으로써 서로 이익을 누리는 방안과 타 지역이나 해외 진출에 있어서 공동보조를 취하는 것으로 생각할 수 있다. 이에 대한 구체적 빙안으로서는 무엇보다 양 지역농업 및 농민에 대한 상호 이해가 이뤄져야 하며, 이를 전제로, 지역별 비교우위가 분명한 품목에 대하여 상호 우선적으로 구매할 수 있도록 하는 등 상호 교역을 지원하며, 농산물 수급 불균형으로 인한 가격파동을 예방하기 위하여 계획생산, 계획 유통이 불가피한 만큼 농협, 농민단체, 지방정부간의 농업정보의 공유와 조정 채널을 구축하고, 지역간 직거래 활성화하고 서로의 이해를 돕기 위한 농산물 장터 등 장소와 기회를 제공하며, 해외수출 시장 개척을 위한 공동 노력, 농업기술의 상호 교류 등이 필요하다.

  • PDF

Search Heuristics for Capacitated Refuse Collection Network Design in Reverse Logistics (역방향 로지스틱스에서 용량제약을 고려한 수거망 설계문제에 관한 탐색기법)

  • Kim, Ji-Su;Choi, Hyun-Seon;Lee, Dong-Ho
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.33 no.1
    • /
    • pp.41-50
    • /
    • 2010
  • 본 논문에서는 수명이 다한 제품이나 소비자가 더 이상 사용하지 않는 폐기품을 다시 재사용하거나 폐기하는데 필요한 일련의 활동을 위한 역방향 로지스틱스에서의 수거망 설계 문제를 다루고 있다. 수거망 설계 문제는 수거지점의 위치와 수요지의 폐기품을 수거 지점에 할당하는 것을 결정하는 문제로 정의할 수 있으며 수거지점은 재활용품이나 폐기품이 위치한 지점 근처에 위치하고 주어진 잠재적인 위치를 중에서 결정하게 된다. 여기서, 각 수거지점은 용량제약이 있어 수거 지점에 할당되는 폐기품의 양에는 제한이 있다. 본 논문에서 다루는 수거망 설계문제에서는 수거지점을 설치하는데 필요한 고정비용과 수요지와 수거지점간의 수송비용의 합을 최소화하는 것을 목적으로 한다. 또한 대상문제를 보다 명확히 설명하기 위하여 징수계획법을 이용한 수리적 모형을 제안하였으며 문제의 복잡도 인하여 타부 서치와 시뮬레이티드 어닐링 두 가지 형태의 탐색기법을 제안하였다. 이들 탐색기법에 대하여 최대 500개의 잠재적 위치를 가지는 문제에 대하여 실험을 수행하였고 실험결과를 제시하였다.

Morphometric Study of Achyranthes bidentata Complex Using Numerical Taxonomy (수리분류를 이용한 쇠무릎 분류군의 외부형태 연구)

  • Ahn, Young Sup;Kim, Kwan Su;Kim, Hui
    • Korean Journal of Medicinal Crop Science
    • /
    • v.20 no.6
    • /
    • pp.466-471
    • /
    • 2012
  • 'Usul' is a traditional medicinal herb, which has anti-inflammatory activities is distributed in India, Nepal, China, Korea, Japan. Korea pharmacopeia listed 'Usul' as either a species of Achyranthes japonica (Miq.) Nakai or A. bidentata Blume. Recent taxonomic studies in China and Japan delimited these taxa as two varieties, A. bidentata Blume var. bidentata and var. japonica Miq. A multivariate morphometric study of Achyranthes bidentata complex was undertaken to assess the entities of taxa that usefully could be recognized. Five quantitative characters were reviewed and analyzed with 293 specimens from Korea. The univariate analysis of inflorescence length, interval between florets, angle between floret and floral axis indicated that ranges among all taxa were continuous. However, quantitative characters of membrane size and the number of hairs within 4 were useful to identify two varieties. In PCA, the first three principal components accounted for 89.4% of the total variance. PCA revealed that var. bidentata showed distinctions in morphological attributes from var. japonica entity. Therefore, continued recognition at the infraspecifc level for these taxa is supported.

A Study on the Roof Components of the Traditional Single-Room Square Type Pavilion (한칸형 전통 사각정자의 지붕부 연구)

  • Jeong, Da-In;Kim, Choong-Sik
    • Journal of the Korean Institute of Traditional Landscape Architecture
    • /
    • v.39 no.3
    • /
    • pp.56-64
    • /
    • 2021
  • Pavilion is an important landscape installation in the traditional landscaping and a representative facility that organizes space. To interpret and succeed the traditional landscape space, researches on the shape and structure of the traditional pavilion are also needed. However, researches on the style and structure of the traditional pavilion are difficult to be found. Accordingly this study aimed to identify the structural characteristics of roof part that occupied the largest portion in determining the shape of pavilion. Our research findings are as follows. As a result of analyzing 15 traditional Single-room square pavilions whose structure could be identified, it was found that the main building elements that distinguished the type of roof part in the Single-room square were crossbeam, ridge pole, and baluster. Depending on the presence of roofing members, pavilion was classified into five types: crossbeam, crossbeam+ridge pole, crossbeam+baluster, ridge pole, and baluster. In addition, as a result of analyzing the load and joint that worked on crossbeam based on the shape classification of roof part, it was found that in the traditional Single-room square pavilion, crossbeam was designed to play a balancing role between pillar and load. This study is significant in that it attempted to make a close interpretation of the shape of roof part in the pavilion and the role and function of building elements in terms of size, ratio, and load.

Classification of Domestic Freight Data and Application for Network Models in the Era of 'Government 3.0' ('정부 3.0' 시대를 맞이한 국내 화물 자료의 집계 수준에 따른 분류체계 구축 및 네트워크 모형 적용방안)

  • YOO, Han Sol;KIM, Nam Seok
    • Journal of Korean Society of Transportation
    • /
    • v.33 no.4
    • /
    • pp.379-392
    • /
    • 2015
  • Freight flow data in Korea has been collected for a variety of purposes by various organizations. However, since the representation and format of the data varies, it has not been substantially used for freight analyses and furthermore for freight policies. In order to increase the applicability of those data sets, it is required to bring them in a table and compare for finding the differences. Then, it is shown that the raw data can be aggregated by a particular criterion such as mode, origin and destination, and type commodity. This study aims to examine the freight data issue in terms of three different points of view. First, we investigated various freight volume data sets which are released by several organizations. Second, we tried to develop formulations for freight volume data. Third, we discussed how to apply the formulations to network models in which particular OR (Operations Research) techniques are used. The results emphasized that some data might be useless for modeling once they are aggregated. As a result of examining the freight volume data, this study found that 14 organizations share their data sets at various aggregation levels. This study is not an ordinary research article, which normally includes data analysis, because it seems to be impossible to conduct extensive case studies. The reason is that the data dealt in this study are diverse. Nevertheless, this study might guide the research direction in the freight transport research society in terms of data issue. Especially, it can be concluded that this study is a timely research because the governmemt has emphasized the importance of sharing data to public throughout 'government 3.0' for research purpose.

2-Dimensional Moisture Migration Modeling in Drip-Irrigated Root Zone (점적관개(點滴灌漑)에서 토양수분 이동 현상에 대한 2차원 모델 개발 연구)

  • Ro, Hee-Myong;Kim, Seung-Hyun
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.30 no.4
    • /
    • pp.314-327
    • /
    • 1997
  • A 2-dimensional soil water flow model was developed to describe the migration of soil moisture in drip-irrigated root zone employing cylindrical coordinate system. Several natural phenomena were incorporated into the model such as transpiration, various types of evaporation, and ponding due to the increase in irrigation rate. Model was solved numerically by finite difference method. The model was verified in several ways leading to the conclusion that it can describe the soil moisture migration in drip-irrigated root zone fairly well. From sensitivity analysis, vertical migration of soil moisture was found to move faster than the horizontal one, which indicates the vertical location just under the dripping point are adequate for measuring points of soil moisture. The pot shape of soil moisture in irrigated zone was proved to be caused by evaporation at the soil surface. Also, it was found that the hydraulic conductivity has greatly influential to the soil moisture migration, and that the soil moisture continues to migrate vertically after irrigation stops.

  • PDF

Development of a System for Hybrid Environmental Control in the Multi-Greenhouses (다동온실의 복합환경 제어를 위한 시스템 개발)

  • 고학균;이대원;최창현;김채웅;김재민;권영삼
    • Journal of Bio-Environment Control
    • /
    • v.7 no.1
    • /
    • pp.1-8
    • /
    • 1998
  • A Hardware system of hybrid environmental control was developed for using it in the multi-greenhouse. Now, an on/off control system is most utilized in protected cultivation, but a hybrid environmental control system is not yet. This system consists of a hardware to be devided by physical elements and a software for the hardware a personal computer, a hybrid environmental control and a communication Program for modules. The hardware was made of several independent modules with independent CPU. Each module was made to slots. which are very convenient to mount and take off. Also, they are managed easily to repair, add, remove, and change of their function and expansion. The software for a personal computer was a menu driven program written in visual basic within a Windows environment for easy applications by a user. The hybrid environmental control software have operating factors operate continuously with temperature, humidity and others in greenhouse. Communication programs were used both 485 communication method for long distance communication between modules and CRC communication method for making easy to program, and less errors between personal computer and modules.

  • PDF

Numerical taxonomic study of Najas L. (Hydrocharitaceae) in Korea (한국산 나자스말속(Najas L.)의 수리분류학적 연구)

  • Na, Hye Ryun;Choi, Hong-Keun
    • Korean Journal of Plant Taxonomy
    • /
    • v.42 no.2
    • /
    • pp.126-140
    • /
    • 2012
  • We conducted principal component analyses using the thirty two quantitative characteristics of Najas from South Korea to examine the morphological variation and diagnostic characteristics. As a result of our investigation and the morphometric analyses, each taxon could be identified using the leaf width, shape of the leaf sheath, number of teeth on the leaf margin, number of anther cells, number of areoles in each longitudinal row of seeds, and the ratio of the areole width to the length. Dioecious Najas marina was clearly distinguished from the other monoecious taxa (N. graminea, N. gracillima, N. minor, N. oguraensis, and N. orientalis) by the larger size of the stem, the leaf, the flower and the fruit. The monoecious taxa could be identified using vegetative characteristics except for N. minor and N. oguraensis, which were distinct from each other according to the locule number in the staminate flower.

Development of Automatic Crack Detection System for Concrete Structure Using Image Processing Method (이미지 분석기법을 이용한 콘크리트 구조물의 균열 검출 시스템 개발)

  • Lee, Ho Beom;Kim, Jong Woo;Jang, Il Young
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.16 no.1
    • /
    • pp.64-77
    • /
    • 2012
  • In this study, the crack detecting system with digital image processing techniques based on the mathematical morphology method was developed to detect cracks in concrete structures. In the developed system, the image combining technique of reconstructing multiple images as an entire single image considering efficient management of analysis results was applied as an additional module. The developed system was verified through a field test with the cracked concrete culvert and the crack width of 0.2 mm was able to be detected in the 40m span. In the image analysis, the difference between calculated crack width and actual crack width were less than 0.08mm. For image combination in the stitching test of pattern images, the stitched image was identical with the original picture of entire subject in the visual perception level.