• Journal of the Society of Disaster Information
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• v.15 no.4
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• pp.459-468
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• 2019

Purpose: The cavity exploration of the lower part of the road is carried out to prevent ground-sinking. However, the detected communities cannot be identified by the cavity location and history information, such as repackaging the pavement. Therefore, the field applicability of RFID systems was evaluated in this study to enable anyone to accurately identify information. Method: During temporary recovery, tag recognition distance and recognition rate were measured according to underground burial materials and telecommunication tubes using RFID systems with electronic tag chips attached to the bottom of the rubber cap. Result: The perceived distance and perceived rate of depth for each position of the electron tag did not significantly affect the depth up to 15cm, but it did have some effect if the depth was 20cm. In addition, water effects from nearby underground facilities and rainfall are relatively small, and the effects of wind will need to be considered during the weather conditions of the road. Conclusion: The RFID tags for field application of the pavement management system store various information such as location and size of cavity, identification date, cause of occurrence, and surrounding underground facilities to maximize cavity management effect with a system that can be computerized and mobile utilization.

• The Journal of Korean Institute of Information Technology
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• v.16 no.11
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• pp.43-49
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• 2018

Computer simulation was performed using the SIMION program to develop an electron gun for MCP cleaning. The target, MCP, is located 180mm from the source of the electron gun, and the diameter of the MCP is approximately 20mm. Therefore, we tried to find the condition that the beam diameter of electrons reaching the MCP is to be 20mm using four variables such as E, ${\phi}$, d1, d2, where the E is the energy of the electron reaching the MCP, the ${\phi}$ is the diameter of the extractor, and the d1 and the d2 are the distance from the electron source to the end of the extractor tube, and to the wall of chamber, respectively. As a result of simulation, we figuried out that the E and the d2 have little effect on the beam diameter. On the other hand, we also found that the beam diameters were very sensitive to the d1 and varied relatively large with respect to the ${\phi}$, and the d1 was the secondary order function of the ${\phi}$. Therefore we found that this function will allow us to design electron guns that are suitable for the purposes of this study.

• Journal of Sensor Science and Technology
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• v.30 no.1
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• pp.25-29
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• 2021

In this study, we successfully developed a highly reliable ultrasonic sediment sensor to detect the sediment levels in sewer pipes in harsh environments. The ultrasonic transducer employed in the ultrasonic sediment sensor was designed so as to possess a simple structure. The developed sensor was carefully optimized by simulating the electromechanical characteristics, radiated sound wave pressures, and directivity via finite element analysis. It was also designed to possess a simple mounting structure minimizing the flow disturbance in a 400-mm sewer pipe; additionally, eight ultrasonic transducers were arranged in a four-channel mode, allowing for measurement of the sediment height in five easy steps. Through experimental evaluations, we verified the performance of the ultrasonic sediment-level sensor and its industrial applicability. The results suggested that although the precision value was notably low at 15 mm, the sediment detection performance was adequate; therefore, the developed sensor can potentially be used in industrial applications.

• Applied Microscopy
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• v.38 no.2
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• pp.89-96
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• 2008

Dolomedes spiders of the family Pisauridae are one of free wandering spiders with semi-aquatic habitation. They do not build web for prey-hunting but build a nursery web for spiderlings. This paper describes the fine structure of the silkspinning spigots of the fishing spider Dolomedes sulfureus revealed by the field emission scanning electron microscope (FESEM). The fishing spider Dolomedes sulfureus possesses only three types of silk glands which connected through the typical spinning tubes on the spinnerets. The silk spigots of this spider were identified as three groups: ampullates, pyriforms and aciniforms. Two pairs of major ampullate glands send secretory ductules to the anterior spinnerets, and another two pairs (or $1{\sim}2$ pairs in males) of minor ampullate glands supply the middle spinnerets. In addition, the pyriform glands feed silk into the anterior spinnerets ($62{\sim}68$ pairs in females and $45{\sim}50$ pairs in males), and the aciniforms send ductules to the middle ($33{\sim}40$ pairs in females and $18{\sim}25$ pairs in males) and the posterior spinnerets ($42{\sim}50$ pairs in females and $24{\sim}28$ pairs in males). Among these, the ampullate one is the most predominate gland in both sexes.

• (The)Study of the Eastern Classic
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• no.57
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• pp.437-466
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• 2014

This paper, is in the focus of the fact that was popular in the Joseon Dynasty, was clearly private background and fashionable aspects of its creation. In Section 2, as the background of the epidemic of of the Joseon Dynasty, and was derived creative situation of . is the "left Order live music" relationship center rather, was that it was created by the Academy belongs is highlighted "Hanlin year". As a result, collapses the relationship between the order raw Korea early left, in conjunction with the boast to debauchery and evaluated surface Shinyoung of successor Geibun of this academy, be epidemic in the Joseon Dynasty it is the could be. In Chapter 3, and two to the original, it was examined the epidemic surface of of the Joseon Dynasty. The epidemic of surface, in the conventional research and are relatively detailed, but in this paper, while accommodating the existing research results, of consideration "Hanlim feast" has led to Geibun of Korea "immune new Feast" was observed a trend surface is placed around the fact. As a result, , the Joseon is that it has been singing on the occasion official four-kan and Geibun center, first Nara are exempt new feast bonds back to the four Hall again in Geibun, usually it can be seen that it is spread in the Scholar-official and gisaeng's. Lower limit has been singing can be up to around the late 17th century it has been speculated through the time of Gimumanjun.

• (The)Study of the Eastern Classic
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• no.72
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• pp.217-264
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• 2018

The purpose of this research is to understand the view on people(百姓) and Lee Won-ik(李元翼)'s view on politics, comparing with Seonjo(宣祖)'s view on them. They as political actors sufficiently cognized the condition of life of people had been very desperate. Seonjo had approached from politics to the life of people, while Lee from the life of people to politics. The former has the precariousness of transformation and instrumentalisation of the life of people. The latter has the possibility of the life of people to lead the politics. Lee's stance was on the latter aspect. He had tried to conceive the people as they are, in other words as reality, not as they should be, in other words as idea. He refrained the elucidation of people from confining it within dichotomy structure of ruling-ruled. He had tried to conceive the organic relationship between people and other existences within community. He did not give knowledge-centered question of what is the life of people, but gave situation-phenomenon-centered question of how people has been living. This approach eulciates Lee's focus on the problems of Gongyi(工役), military service(軍役), Labour service(?役), the reduction and exemption of the tax, and the appointment of provincial officer(守令). As for Lee Won-ik, the best form of life of people is to make people have mind to deserve to live, to economize their power(寬民力), to make them savor their life(樂民生), and to make their life easy(安民).

• The Optical Journal
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• s.118
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• pp.72-80
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• 2008

사진영상분야에서 세계 최대 규모를 자랑하는 '2008 포토키나'가 지난 9월 23일부터 28일까지 독일 쾰른 국제전시장에서 화려하게 펼쳐졌다. 그 어느 해보다 디지털 영상기기쪽과 관련하여 '이슈'가 많았던 올해 전시회에는 전 세계 49개국에서 1,523개 업체가 참가하고 전시기간동안 16만 여명의 관람객이 다녀갔다. 올해 전시회에는 국내에서 삼성전자. 삼성테크원을 비롯하여 관련 중소전문업체들이 대거 참가하면서 더욱 관심이 집중되었다. 중소기업들의 해외판로 개척을 지원하고자 한국광학기기협회에서는 올해도 22개 국내 업체들과 공동관으로 참가하여 알찬 결실을 맺고 돌아왔다. 본 고에서는 디지털영상기기를 중심으로 한 올해 주요 전시경향을 집어보고 국내 참가업체들의 성과를 소개하고자 한다.

• 정보화사회
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• s.23
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• pp.22-28
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• 1989

협회는 최근 국가전산망 기능규격 작성을 위한 첫단계로 "OSI 기능표준에 관한 공청회"를 개최했다. 그동안 당 협회, 전자통신연구소, 개방형컴퓨터통신연구회, 통신기술협회 등 관련기관에서 진행해 오던 전산망 표준화연구의 결과에 대한 산.학.연.관의 자문과 의견수렴을 위해 개최된 이날 공청회에서는 개방시스템 프로파일(안),MHS 기능표준(안).FTAM기능표준(안),하위계층 기능표준(안)등에 관한 설명과 심도깊은 의견개진이 폭넓게 논의됐다. 본지에서는 이날 발표된 각 기능표준(안) 내용을 요약, 정리한다. 자세한 내용을 원하시는 분은 "정보화사회" 담당자에게 연락하면 된다.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.11 s.188
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• pp.17-23
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• 2006

• Digital Contents
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• no.1 s.116
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• pp.37-37
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• 2003

제 3회 디지털도서관 컨퍼런스 및 전시회가 지난달 7일 전국 도서관 및 업게 관계자 450여명이 참석한 가운데 성황리에 막을 내렸다. 한국소프트웨어진흥원, 한국데이터베이스진흥센터, 전자신문 등이 주최한 이번 디지털도서관컨퍼런스 및 전시회는 '디지털도서관 구축과 운영'이라는 주제로 지난달 6일에서 7일까지 이틀간에 걸쳐 삼성동 코엑스 오디토리움과 대서양관에서 진행됐다. 특히 이번행사에는 전국 도서관 관장(책임자)들이 200명이나 참석해 빠르게 확산될 것으로 전망되는 디지털 도서관 구축사업에 대한 업계의 뜨거운 관심을 보여줬다. 디지털도서관컨퍼런스 및 전시회의 이모저모를 살펴봤다.