• Title/Summary/Keyword: Work Origin

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A Study of Rivulet Flow on Inclined Surface (경사면에서의 리뷸릿 유동에 관한 연구)

  • Kim, Jin-Ho;Kim, Ho-Young;Lee, Jae-Heon
    • Proceedings of the KSME Conference
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    • 2001.06e
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    • pp.576-581
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    • 2001
  • When a liquid is supplied through a nozzle onto a relatively nonwetting inclined solid surface, a narrow rivulet forms. This work provides novel physical insights into the following phenomena in the rivulet flow that have not been well understood to date. Firstly, the fundamental mechanism behind the transition of a linear rivulet to a droplet flow is investigated. The experiments show that the droplet flow emerges due to the necking of a liquid thread near the nozzle. Based on the observation, it is argued that when the retraction velocity of a liquid thread exceeds its axial velocity, the bifurcation of the liquid thread occurs, and this argument is experimentally verified. Secondly, a discussion on the curved motion of a meandering rivulet is given. This study proposes the contact angle hysteresis as a primary origin of the centripetal force that enables the rivulet's curved motion A simple scaling analysis based on this assumption predicts a radius of curvature which agrees with the experimental observation.

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A study on the environment of waste shell and its recycling method (패각의 부존환경 및 재활용에 관한 연구)

  • 이인곤
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.10 no.2
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    • pp.159-165
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    • 2000
  • This study was investigated the environment of waste shells such as oyster, cockle and paphia on southern shore in korea and established the recycling method to prevent the environmental pollution, etc. The waste shells were reclaimed at public shore illegally or leaved on the surroundings of shore. The origin mechanism, XRD and TG-DTA analyses were performed to effective recycling of waste shells, and the optimal recycling method was preparation of the calcium carbonate. In this work, calcium carbonate and lime fertilizer of granular shape were prepared using the waste shell.

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A Case of Ovarian Serous Cystadenocarcinoma Diagnosed by Cervicovaginal Smear (자궁경부.질도말로 진단된 난소의 장액성 낭성암종 1예)

  • Park, Hye-Rim;Nam, Joo-Hyun;Park, Young-Euy
    • The Korean Journal of Cytopathology
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    • v.3 no.2
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    • pp.104-110
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    • 1992
  • Although there have been a few reports of cases in which cancer cells of extrauterine origin were observed in vaginal smears, such findings are relatively uncommon. We recently experienced a case of ovarian serous cystadenocarcinoma diagnosed by cervicovaginal smear in a 56-year-old woman in routine work-up of carcinoma peritonei. The cellular features were several scattered cellular clusters of adenocarcinoma cells in clear background without tumor diathesis. Psammoma body was not present. Exploratory laparotomy confirmed the diagnosis of bilateral ovarian serous cystadenocarcinoma with multiple metastases.

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The present condition and problem of Architectural Stained glass decoration in Korea - Focused on the Acceptance of the technique and the present state of the studios - (국내 건축 스테인드글라스의 현황과 과제 - 기법의 수용과정과 공방현황을 중심으로 -)

  • Kim, Jung-Shin
    • Korean Institute of Interior Design Journal
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    • no.34
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    • pp.140-148
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    • 2002
  • This Study is concerned with the present condition and prospect of architectural stained glass in Korea. Stained glass had been architectural art from the origin. But it had declined since the Renaissance era, and began to revive in the early 20th century. The stained glass inflowed with church architecture occasionally by the western missionaries. And it has been developed actively since 1980' with the boom in church building. There are about 30 studios which are making stained glass in Korea, but very few studio work true architectural stained glass. Stained glass is still treated as simple decoration or 2-dimensional mosaic. Architect and interior designer even have little understanding of architectural character of stained glass.I have considered the problems and prospected architectural stained glass which inspire modern architecture with human sensitivity in Korea.

Preparation of YBCO thin films by MOD-TFA process (MOD-TFA법에 의한 YBCO 박막의 제조)

  • 김영국;유재무;고재웅;허순영;이동철
    • Progress in Superconductivity
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    • v.5 no.1
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    • pp.80-83
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    • 2003
  • Superconducting YBCO thin films are fabricated on single-crystalline substrates by Metallo-organic Depostion process employing Trifluoroacetic acid as a chelating agent (MOD-TFA). (100)-oriented single crystalline LaAlO$_3$ substrates were employed to grow superconducting film with high crystallinity. The fully processed YBCO thin films were characterized with XRD, SEM, EDS, etc. The microstructures of YBCO thin films show labyrinth-like patterns. The origin of this microstructure was delineated by compositional inhomogeneity during the MOD process and it was shown that the microstructure may be modified by additives. In this work, effects of additives on the microstructures and electrical properties of YBCO thin films have been investigated.

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A Study on Characteristics of Design Concept and Interior Design Projects of Uchida Shigeru (우치다 시게루의 디자인 개념과 실내공간 표현 특성에 관한 연구)

  • 김은주
    • Korean Institute of Interior Design Journal
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    • v.13 no.4
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    • pp.3-11
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    • 2004
  • The origin of Uchida is strictly avant-garde and carries a social dimension. The work is a challenge to consumption-oriented mass production, a revolt against intrusive one-way communication, and an aversion to oppressive politics. Such a spirit led to a rare communication design that was created in collabolation with the user and designer, both relating to each other's senses of touch and in the same familiar plane. He first began by focusing on the physical movements of objects in order to achieve maximum comfort and lightness. From the beginning, He avoided strong, sturdy solids, and favored the faint, transitory and vulnerable. He choose the pursue "furniture with delicate lines", "to create darkness by layering shadows", all of which are extremely unique and resulted in designs that have a profound presence. Uchida gives various meanings and functions to the grid. This activities and philosophy of Uchida Shigeru influenced on the interior design.the interior design.

Technical Roadmap Building in Traditional Oriental Medicine Field - Focused on Jeju Region - (한방식품 개발 분야 기술로드맵 구축 - 제주지역을 중심으로 -)

  • Kim, Min-Cheol;Bu, Chang-San;Kim, Jae-Il
    • Proceedings of the Korea Technology Innovation Society Conference
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    • 2006.11b
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    • pp.155-166
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    • 2006
  • Application of industry roadmap is to propose the vision on the future through correction and supplement of various environment change(nation competition power uplift, origin technology development, long and short-term vision establishment, R&D investment improvement, co-work increase etc). Now, in Jeju region, Roles of traditional medicine is needed by environmental needs(competition loss of Jeju industry, limitation of tourism industry etc). Thus, the purpose of this study is to contribute to region economy activity by building the TRM of foods field in traditional oriental medicine industry through the analysis of earlier TRM paper and materials.

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Position Estimation of an Underground Acoustic Source by a Passive Sonar System

  • Jarng, Soon-Suck
    • Proceedings of the Acoustical Society of Korea Conference
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    • 1998.06e
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    • pp.133-136
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    • 1998
  • The aim of the work described in this paper is to develop a complex underground acoustic system which detects and locates the origin of an underground hammering sound using an array of six hydrophones located about 100m underground. Two different methods for the sound localization will be presented, a time-delay method and a power-attenuation method. In the time-delay method, the cross correlation of the signals received from the array of sensor sis used to calculate the time delays between those signals. In the power-attenuation method, the powers of the received signals provide a measure f the distances of the source from the sensors.

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Characteristics of Polycrystalline Silicon TFT with Stress-Bias (스트레스에 따른 다결정 실리콘 TFT의 영향)

  • Baek, Do-Hyun;Lee, Yong-Jae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.05b
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    • pp.233-236
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    • 2000
  • Polycrystalline Silicon Thin Film Transistors(Poly-Si TFT's), fabricated at temperature lower than $600^{\circ}C$ are now largely used in many applications, particularly in large area electrons. In this work, electrical stress effects on Poly-Si TFT's fabricated by Solid Phase Crystal(SPC) was investigated by measuring electric properities such as transfer and output characteristics, and channel conductance. Consequently, It is turned out that it should be noted the output characteristics, drain current and channel conductance, strongly degrade around origin.

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The research of the Control Work Position for developing ATC (항공관제시스템 개발을 위한 현시시스템 연구)

  • Na, Sang-Il;Lee, Jun-Woo;Won, In-Su;Choi, Sang-Bang;Park, Hyo-Dal;Jeong, Dong-Seok
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.1197-1198
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    • 2008
  • The purpose of the Air Traffic Control(ATC) system is to provide a safe, efficient flow of air traffic from origin to destination. Therefor, it is important to reduce the operational errors. Most of errors occurs from controllers. So, we suggest the human machine interface scheme for Air Traffic Control system.

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