• 제목/요약/키워드: Slender body

검색결과 190건 처리시간 0.026초

측벽근방을 항해하는 대형선박에 미치는 측벽의 영향 (The Interaction Effect Acting on a Ship Hull in the Proximity of Bank Wall)

  • 이춘기;박한일
    • 한국항해항만학회지
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    • 제28권5호
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    • pp.333-337
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    • 2004
  • 측벽과 선박간의 상호 간섭력이 선박 조종 운동에 상당히 크게 작용하는 것은 잘 알려셔 있다. 이 논문에서 측벽 부근을 항해하는 선박에 미치는 측벽의 간섭 영향에 대해서 다루어지고, 선박과 측벽간의 간섭력 추정을 위해 세장체 이론을 토대로 학 계산 방법이 적용되며, 선박 조종 운동에 미치는 측벽의 영향을 파악하기 위하여 선박과 돌제(반원)형상을 하고 있는 측벽간의 간섭력을 수치 계산하였다. 이 논문에서 사용되어진 계산 방법은 제한수역에서의 충돌 회피를 위한 선박의 자동 세어 시스템과 해상 교통 제어 시스템 및 항만 건설 등을 위한 초기 설계 단계에서 선박 조종성의 예측에 상당히 유용할 것이다

방파제 형상 연직구조물 부근을 항행하는 대형선박에 미치는 간섭력에 관한 연구 (A Study on the Hydrodynamic Force Acting on a Large Vessel in the Proximity of Breakwater)

  • 이춘기
    • 한국항해항만학회지
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    • 제37권4호
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    • pp.345-350
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    • 2013
  • 제한수역에서 측벽부근을 대형선박이 항행할 경우, 측벽으로 인하여 발생하는 유체력이 대형선박의 조종운동에 상당히 크게 영향을 미친다는 것은 잘 알려져 있다. 이 논문에서는 방파제형상을 하고 있는 측벽 부근을 대형선박이 항행하는 경우, 선박과 방파제 형상간의 간섭력 추정을 위해 세장체 이론을 토대로 한 계산 방법을 적용하였으며, 선박에 미치는 측벽의 영향을 파악하기 위하여 방파제길이, 방파제와 선박간의 거리 및 수심을 변수로 하여 선박과 측벽과의 간섭력을 수치 계산하였다.

Numerical study of hydrodynamic interaction on a vessel in restricted waterways

  • Lee, Chun-Ki
    • International Journal of Naval Architecture and Ocean Engineering
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    • 제4권1호
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    • pp.1-8
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    • 2012
  • The hydrodynamic interaction between ship and bank can't be neglected when a vessel is app- roached toward the tip of a wedge-shaped bank in restricted waterways, such as in a harbor, near some fixed obstacles, or in a narrow channel. In this paper, the characteristic features of the hydrodynamic interaction acting on a slowly moving vessel in the proximity of a wedge-shaped bank are described and illustrated, and the effects of water depth and the spacing between ship and wedge-shaped bank are summarized and discussed based on the slender body theory. From the theoretical results, it indicated that the hydrodynamic interactions decrease as wedge-shaped bank of angle ${\beta}$ in-creases. For water depth to draft ratio less than about 2.0, the hydrodynamic interactions between ship and bank in-crease sharply as h/d decreases, regardless of the wedge-shaped bank of angle ${\beta}$. Also, for lateral separation more than about 0.2L between ship and wedge-shaped bank, it can be concluded that the bank effects decrease largely as the separation increases.

동해의 털담치(이매패류)에 공생하는 요각류 1신종, Modiolicola avdeevi (Modiolicola avadeevi, a New Sabelliphilid Copepod (Poecilostomatoida) from a Bivalve in the Sea of Japan)

  • Kim, Il-Hoi
    • Animal Systematics, Evolution and Diversity
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    • 제11권3호
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    • pp.315-321
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    • 1995
  • 동해에 서식하는 이매패류인 털담치(Modiolus difficilis)에 공생하는 요각류 1신종 Modiolicola avdeevi를 기재하였다. 이 종은 외견상diolicola bifidus와 매우 유사하나 두 종의 대촉각, 꼬리돌기, 다섯째 다리의 형태를 비교하면 이들은 명백히 다른 종이다.

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Newly recorded sea star Henricia hayashii(Asteroidea: Spinulosida: Echinasteridae) in the East Sea, Korea

  • Ubagan, Michael Dadole;Shin, Sook
    • 환경생물
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    • 제39권3호
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    • pp.289-292
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    • 2021
  • Henricia specimen was collected from the East Sea of Korea using fishing nets. The specimen was identified as Henricia hayashii (Djakonov 1961), belonging to the family Echinasteridae of the order Spinulosida. This species can be distinguished from other Henricia species by slender arms (R/r=7.4), constricted arm base, six to thirty-five slender spinelets, open-meshed, reticulated abactinal skeleton comprising semi-triangular, rod-like form, and small ossicles present inside the papular areas. This species superficially resembles H. reniossa in terms of its body size but differs in the shape and arrangement of the abactinal and actinal plates. To date, two genera of Echinasteridae, Aleutihenricia and Henricia, including a total of 14 species, have been reported in Korea. Herein, the morphological characteristics of H. hayashii are described, and photographs are provided.

아코디언 플리츠 스커트의 주름너비와 스커트길이 변화에 따른 시각적 효과 (A Study on the Visual Effects According to Changes in Width of Pleats and Skirt Length of Accordion Pleats Skirt)

  • 이정순
    • 한국의상디자인학회지
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    • 제12권1호
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    • pp.77-88
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    • 2010
  • The purpose of this study is to evaluate the differences of visual effects by variations in the width of pleats and the length of the accordion pleats skirt. The stimuli are 21 samples: 7 variations of the width of pleats and 3 variations of the length of skirt. The data has been obtained from 43 fashion design majors. The data has been analyzed by Factor Analysis, Anova, Scheffe's Test and the MCA method. The results of the study are as follows: The visual effects by the number of pleats and the length of skirt are composed of 2 factors: verticality and thickness of lower body, shape of abdomen. In these factors, verticality and thickness of lower body factor is estimated by the most important factor. The accordion pleats skirt makes the lower body look longer when the width of the pleats is wider, and helps the calf and leg look thinner. Also, the waist looks more slender and thin. As the skirt gets longer, one looks taller, and legs look longer and thinner. The shape of abdomen is no difference according to the width of pleats. As the skirt gets longer, the waist looks more slender and thinner. The interaction of visual effect according to the changes in width of pleats and skirt length of accordion pleats skirt is not shown, and the skirt length has more effect than the width of pleats does in verticality and width of lower body factor. The width of pleats has more effect than the skirt length does in shape of abdomen factor.

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투라치, Trachipterus ishikawae Jordan & Snyder, 1901의 형태 및 골격 (Description of Morphology and Osteology of the Slender Ribbonfish, Trachipterus ishikawae Jordan & Snyder, 1901)

  • 한경호;이성훈;김춘철;유태식
    • 한국어류학회지
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    • 제32권3호
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    • pp.136-142
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    • 2020
  • 이 연구는 투라치의 형태 및 골격 관찰을 위해 2017년에 여수시 돌산도와 부산에서 채집한 3개체를 대상으로 외부형태를 관찰하고 내부 골격을 삶아 채골하여 관찰하였다. 형태적 특징은 다음과 같다. 몸은 길고 측편되어 있었고, 위턱은 앞으로 돌출됐다. 체색은 은백색을 띠고 있었고, 눈은 크며, 가슴지느러미와 꼬리지느러미는 등쪽으로 향해 있었다. 작은 돌기들이 배쪽에 머리 뒤부터 꼬리까지 있었다. 새파 수는 (3~4)+(7~8)개였다. 등지느러미 줄기는 185~190개였고, 가슴지느러미는 12~13개, 꼬리지느러미에는 9개의 연조와, 5+2개의 짧은 극조가 있었다. 골격 특징은 다음과 같다. 주상악골은 길고 4개의 이빨이 있었다. 치골은 삼각형 모양이었고, 간새개골과 하새개골은 크고 넓었으며, 5개의 새조골이 있었다. 후쇄골은 가늘고 길게 발달 되어있었다. 척추골은 79~80개였고, 후방 추골은 길었으며, 미부봉상골에는 5~6개의 돌기가 있었다.

14~16세 여자 청소년 하반신 체형 유형화 및 특징 분석 (Body Type Classification and Characteristic Analysis of the Lower Body of 14-16 Years Old Female Adolescents)

  • 박세영;김동은
    • 한국의류학회지
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    • 제46권4호
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    • pp.672-686
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    • 2022
  • The study classifies and analyzes the lower-body-shape types of female adolescents aged 14 to 16 years to provide meaningful information for making ready-to-wear patterns that are suitable for various female adolescent body types. The body-size data of 830 females aged 14 to 16 years were analyzed from 6th Size Korea anthropometric study. A factor analysis of 27 measurement items related to the lower body extracted 3 factors: waist/upper legs, height of the lower body, and hip area. A cluster analysis classified the female adolescent lower-body types into four clusters: the skinny body type with the shortest lower-body length, the most obese body type with the largest girth, the normal body type with the longest hip length, and the slender body type with the longest lower-body length. The discriminant analysis determined that nine measurement items had the most influence on classifying lower-body-shape types, and discriminant functions were derived. These results are meaningful because they provide more precise information about lower-body-shape types.

지수치를 이용한 노년여성 체형유형화에 관한 연구 (A Study of Body Form Classification on Eldlerly Women Using Body Indices)

  • 이경희;최혜섭
    • 한국의류학회지
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    • 제18권4호
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    • pp.560-565
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    • 1994
  • The purpose of this study was to extract information of body form's classification on elderly women. We measured 242 subjects from 55 to 75 years of age, using 27 direct measurement items and 25 body indices. We analyzed these indices with factor analysis, cluster analysis We obtained these following results 1) Through factor analysis, 4 factors (obesity of torso, location of upper torso items, length of upper torso, location of lower torso items & shoulder length) were extracted from body indices. 2) Through culster analysis, we categorized 4 clusters. Namely, type 1, characterized the best slender type, type 2; characterized obesity type, type 3: characterized middle sized type ; type 4: characterized by fat type less than type 2. We considered that type 3 is the typical type on elderly women. Since analysis using indices is very profitable, it may be necessary to design dummies and patterns for clothing manufacture.

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BMI지수에 의한 신체유형별 신체만족도와 의복적합성에 관한 연구: 20~50대 여성을 중심으로 (A Study on Body Satisfaction and Fitness Apparel Based on Body Type by Body Mass Index: In Women 20-50's Years of Age)

  • 권수애;손부현
    • 대한가정학회지
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    • 제48권6호
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    • pp.1-8
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    • 2010
  • The purpose of this study is to classify body type by BMI and to inquire about body satisfaction and fitness apparel depending on body type among women 20-50years of age. As a result, body types are classified into three groups: lean, normal, and obese figures. On front silhouette, the normal type occupies most in women belonged to lean figure group, the obese lower part of the bodytype in normal figure group, and the obese upper part of the body type in obese figure group. On the other, in side silhouette, the slender type is prevalent in lean figure group, hip obesity in normal figure group, and trunk obesity in obese figure group. In particular, women in the obese figure group were distributed among the various body types. The obese figure group had a lower fitness apparel in the measurement of circumference(e.g., chest, waist, and hip) related to obesity in comparison with measurement of length. Therefore, the development of an optimal sizing system in response to the various body types in the obese figure group is needed to provide more diversity in aesthetic design and continuity among various sizing systems.