• Title/Summary/Keyword: arrangement of patterns

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Wake Patterns of Two Oscillating Cylinders

  • Lee, Dae-Sung;Ha, Man-Yeong;Yoon, Hyun-Sik
    • 한국가시화정보학회:학술대회논문집
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    • 2006.12a
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    • pp.78-85
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    • 2006
  • Flows around two oscillating cylinders in side-by-side arrangement at Re=185 are simulated using immersed boundary method. The cylinders oscillate vertically with prescribed sinusoidal function in opposite directions in uniform cross-flow. Flow patterns and drag & lift forces are described by varying distance between two cylinders and oscillating frequency. Time series of flow patterns are investigated along with corresponding drag k lift coefficients.

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Taxonomic Considerations on the Bast Fibres in the Genus Sida L. (Malvaceae) in Nigeria

  • Oladele, F.A.
    • Journal of Plant Biology
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    • v.29 no.2
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    • pp.135-143
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    • 1986
  • The distributional pattern of the bast fibres strands or bundles in the stems of Sida species represented in Nigeria is studied. Three major patterns of arrangement are recognized, namely aggregation of fibre strands into units with wedge-shaped, or triangular, rectangular, rhomboidal, square and trapezoid outlines; serial arrangement of fibre strands into rings or circular, ovoid, semi-circular or crescentic rows; and intermediate pattern in which both fibre strands-aggregates and serial rows of strands patterns are combined. The first pattern is found in S. linifolia, S. urens and S. scabrida, the second in S. cordifolia, S. pilosa, S. ovata, S. rhombifolia and S. spinosa, and the third in S. garckeana, and S. acuta. A dichotomous key based on these features is presented. Dimensional characteristics of the bast fibre cells are also given.

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Flow-pattern identification around two rectangular cylinders with aspect ratio of 0.5 in tandem arrangement

  • Yang, Letian;Gu, Zhifu;Zhao, Xuejun;Zhang, Weimin
    • Wind and Structures
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    • v.16 no.2
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    • pp.179-192
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    • 2013
  • The flow around two rectangular cylinders with aspect ratio of 0.5 in a tandem arrangement, was investigated using pressure measurements (in a wind tunnel) and flow visualizations (in a water tunnel) in the range of P/h from 0.6 to 4.0. Four flow patterns were identified, and processes of shear layers wrapping around, the shear layer reattachment, vortices wrapping around and vortices impingement, were observed. Mean and rms pressure distributions, flow visualizations and Strouhal numbers were presented and discussed. The paper revealed that the variations of Strouhal numbers were associated with the shear layers or vortex interference around two cylinders.

Flue analysis of indoor air by furniture arrangement pattern in bedroom (침실의 가구배치 패턴별 실내 기류 분석)

  • 유복희
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2001.11a
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    • pp.113-117
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    • 2001
  • This study aims to analyze the relation between furniture arrangement and ventilation. In this study, the furniture layout of students'bedroom have been classified three kinds of patterns so that the air flue of the rooms can be analyzed. According to the results of the study, it is showed that the furniture arrangements have influenced the ventilation efficiency and it has been recognized that space plan needs the applicable study.

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Numerical Study on Laminar Flow over Three Side-by-Side Cylinders

  • Kang, Sangmo
    • Journal of Mechanical Science and Technology
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    • v.18 no.10
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    • pp.1869-1879
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    • 2004
  • The present study has numerically investigated two-dimensional flow over three circular cylinders in an equidistant side-by-side arrangement at a low Reynolds number. For the study, numerical simulations are performed, using the immersed boundary method, in the range of g* < 5 at Re= 100, where g* is the spacing between two adjacent cylinder surfaces divided by the cylinder diameter. Results show that the flow characteristics significantly depend on the gap spacing and a total of five kinds of wake patterns are observed over the range: modulation-synchronized (g* (equation omitted) 2), inphase-synchronized (g* (equation omitted) 1.5) , flip-flopping (0.3 < g* (equation omitted) 1.2) , deflected (g* (equation omitted) 0.3), and single bluff-body patterns (g* < 0.3). Moreover, the parallel and symmetric modes are also observed depending on g* in the regime of the flip-flopping pattern. The corresponding flow fields and statistics are presented to verify the observations.

A Study on the Visual Interaction of Workers under the Effect of Office Layout (사무공간 레이아웃에 따른 근무자의 시각적 교류에 관한 연구)

  • Yoo Uoo-Sang;Choi Yoon-Kyung
    • Korean Institute of Interior Design Journal
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    • v.14 no.5 s.52
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    • pp.35-43
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    • 2005
  • This study aims to explore the relationship between the spontaneous interactions of office workers and their workspace layout. The spontaneous interactions are captured by the measures regarding the 'visual interaction' between workers in their desk layouts. The measures of visual interaction then are examined by means of the office layout or desk arrangement and the properties of work patterns according to the departments, such as general affairs, sales, research and development, and planning. The study finds four types of office layout ; Type 1 with low visual interaction between workers and high intensity of visual interaction, Type 2 with high visual interaction between workers and high intensity of visual interaction, Type 3 with low visual interaction between workers and low intensity of visual interaction, and Type 4 with high visual interaction between workers and high intensity of visual interaction. The study shows that the patterns of unintentional interaction between workers varies according to the property of work and office arrangement and it also argues that the patterns of office layout are different according to properties of work.

A Study on the Dwelling Behavior Patterns and Space Planning of Koreans in the Unite States - Focused on Columbia, Missouri - (한국인 거주 미국주택의 공간별 주생활행위와 공간구성 및 사용행태 - 미주리 주 콜롬비아 시를 중심으로-)

  • Lee, Jee-Heon;Shin, Kyung-Joo;Jang, Sang-Ock
    • Korean Institute of Interior Design Journal
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    • v.18 no.5
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    • pp.119-127
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    • 2009
  • The main goal of this research was to understand housing environment as well as the living behaviors of Korean people who reside in foreign countries. This study includes examination of dwelling units, especially focusing on dwelling behaviors by space types, arrangement and use of the space, and the according residence patterns of the Koreans in the United States. Focus group interview method and survey method were conducted; photography were taken as a visual evidence; and results were analyzed by researchers. This study strongly indicates that most of Koreans try to keep their own way of living in foreign cultures and rather readjust the housing spaces and living patterns to their own culture. The results from this study have limitations in generalizing all Korean families living in foreign cultures, because a convenience sample was used. Although studies of Korean families in Columbia, MO may not provide information that can be generalized to the entire population of Koreans overseas, we expect that this study provides useful insight in understanding and estimating the future trends in residential planning for Koreans.

Organizational patterns for serial management (연속간행물 관리에 적용되는 업무조직 구조의 유형)

  • Koo Jayoung
    • Journal of the Korean Society for Library and Information Science
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    • v.12
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    • pp.87-120
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    • 1985
  • The present study aims at identifying the nature of the organizational patterns for serial management and thus providing an assitance for decision-making in regards to how the serials in an individual library be processed. The premise of the paper is that effective management is ensued from adopting proper organizational arrangement. In the first part. attempts are made to bring to the fore the problems inherent in serial management and the efforts made for possible solutions. The main portion of the paper eximines the two outstanding patterns; namely, the decentralized arrangement patterned after the traditional functions of a library and the centralized one integrating such functions as acquisition, cataloging and information service. Both are examined in light of nature, development, applicability, strengths and weeknesses. Automation is viewed as a strong force for a change in organizing serial work as it has already brought about organizational change in some large libraries. The general conclusion is that a large collection(5,000 active titles or more) has much to benefit from a separate, specialized department. which integrates the related functions; and the smaller collection can be effectively treated like the rest of the library materials, assigning a specific unit responsible for serial work and promoting an informal communication activities which would bring about coordination and coorperation for the free flow of serial work.

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A Study on Authentication Protocol for Secure RFID Tag (RFID Tag 보안을 위한 인증 프로토콜에 관한 연구)

  • Jung, Yong-Hoon;Kim, Jung-Jae;Jun, Moon-Seog
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.8B
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    • pp.805-811
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    • 2009
  • Firstly, this dissertation suggests the tag ID transfer method using two-dimensional arrangement. Secondly, provide better and stable security system compare to existing one by transferring tag; ID using established two-dimensional arrangement. Thirdly, provide operating module, which possible to descramble two-dimensional arrangement, with a character set when descrambling in a tag and a server. Lastly, suggest safe key transfer using a character set and two-dimensional arrangement. In order to embody suggested system and assess, transferred two-dimensional arrangement several times to carry out the experiment. Confirmed that it is impossible for suggested system to decode key patterns compare to existing RFID systems.

Content analysis of embroidery patterns of Korean traditional Beoseonbongips (한국 전통 버선본집 자수문양 콘텐츠 분석)

  • Hong, Heesook
    • The Research Journal of the Costume Culture
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    • v.23 no.4
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    • pp.705-725
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    • 2015
  • A Beoseonbongip is a pouch that holds patterns for making Beoseons. This study aimed to identify the aesthetic and symbolic contents of the embroidery patterns by analyzing the kind, combination types, expression and arrangement types of patterns. In total, 140 Beoseonbongip artifacts, which were mostly made in the Joseon Dynasty, were quantitatively and qualitatively analyzed. The results indicated that about 83% of the total had flower patterns. Various kinds of embroidery patterns used for Beoseonbongips were newly identified. About 73% of the total had different kinds of patterns. Pattern combination types were identified by the kinds of patterns, the number of paired patterns, and the traditional painting styles used. The patterns of Beoseonbongips were expressed schematically more than realistically or abstractly. Beoseonbongips with different patterns on the four triangle tips of the front face and Beoseonbongips with the same/similar patterns on two opposite tips of the front face were observed more than the other types. On the back face, the embroidery patterns were symmetrically arranged, showing various division structures. It was inferred that wishes (e.g., marital harmony, fertility, good health and longevity, happiness, and wealth and fame) were expressed through the symbolic patterns embroidered on the Beoseonbongips. In terms of Korean traditional beauty, the union with nature, the harmony of yin and yang, symmetric balance, and neatness were also emphasized as a esthetic characteristics of Beoseonbongips.