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임수빈,김동환,강진구,당정증,이필수,김기현,정경재,황용석 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.2
In this study, we developed a neutron time-of-flight (nTOF) measurement system for a 1.7-MV tandemproton accelerator with a target covered with 300-nm-thick lithium (Li) layer. With implementation ofbeam chopping module after its ion source, the accelerator is configured to operate in pulsed-beammode with a pulse width <50 ns at 20-kHz repetition rate. This enables the gamma flash-type nTOFmeasurement system to identify the neutron generated with 3-MeV proton beam energy. The nTOFsystem consists of a 300 cylindrical NaI(Tl) and four stilbene scintillation detectors. The NaI(Tl) scintillatoris placed 50 cm from the Li target to measure the time of beam irradiation on the target, and the stilbenedetectors are placed 2 and 2.4 m away to measure nTOF at each location. The nTOF system successfullymeasured the generated neutron energy at irradiated proton energies of 2.6 and 3.0 MeV with an averageenergy resolution of 15%.
임수빈,박성욱 대한전자공학회 2023 전자공학회논문지 Vol.60 No.4
This paper investigated a method to produce sound data from virtual environment, which is essential for data-driven development of gas leak detectors. The produced data were compared with a previous research, where the envelope of sound pressure level along frequency were largely similar. The virtual environment utilized LES model for fluid dynamics and the Lighthill’s model for acoustics. The production was performed with various geometries, leaked gas speeds and orifice shapes. 음향 기반의 가스 누출 감지기 개발에 필요한 가스 누출 음향을, 가상환경에서 생산하는 방법에 대하여 고찰하였다. 그리고 이렇게 만들어진 가상환경이 기존의 연구와 비교하였을 때 유사한 경향을 보임을 확인할 수 있었다. 가상환경에서는 Navier-Stokes equation을 LES (Large Eddy Simulation) 난류 모형을 기반으로 풀이하고, 그 결과로 얻은 유체속도를 이용하여 Lighthill 의 aero-acoustic model 의 해를 구하는 방식을 사용하였다. 이러한 방식으로 특정 위치에서, 누출 환경(기하학적 구조), 누출되는 가스 속도, 그리고 누출구(orifice)의 모양 등을 바꾸어 가면서 음압 크기(sound pressure level)을 얻을 수 있었다.
A 10-Year-Old Girl’s Overcoming the Negative Mother Complex and Its Relationship to Ego Development
임수빈 담화·인지언어학회 2017 담화와 인지 Vol.24 No.4
This paper explores the generic features of fact-checking articles, a new genre in newspaper discourse, by examining 40 fact-checking articles from The Fact Checker of the Washington Post and PolitiFact of the Tampa Bay Times. The study centers on the qualitative and quantitative analysis on the move structure, rhetorical structure, and linguistic strategies of these articles. The analysis on the move structure reveals that the communicative purpose of examining the truth value of political statements is achieved through six obligatory and three optional move components and that the move structure of these articles is realized in various forms. With regard to the rhetorical structure, the analysis demonstrates that the journalists present their arguments more persuasively through various semantic and pragmatic relations. Fact-checking articles have linguistic characteristics as well, especially in terms of direct quotes, tense, modal auxiliary verbs, exclusive we, and appraisal. The analysis finds that the use and function of these linguistic features are related with the property of the move component in which they occur. Based on these findings, this study suggests that fact-checking articles have a hybrid nature of straight news and editorials but are more similar to editorials than to straight news.
임수빈,윤일규,이경석,배학근,변박장 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.9
The author investigated whether there were clear seasonal variations in the incidence of both spontaneous intracerebral hemorrhages(SICH) and subarachnoid hemorrhage(SSAH), and which climatic factor affected on the occurrence rate. From January 1988 to December 1994, 787 patients with SICHs and 556 patients with SSAHs were admitted to our hospital. The author compared the occurrence rate of spontaneous cerebral hemorrhages and the meteorological data on each date, such as daily temperatures(average, maximum, and minimum), temperature change(intradiurnal and daily), precipitation, average wind speed, average relative humidity, duration of sunshine, mean sea level barometric pressure, daily barometric pressure difference and wind-chilling effect. There was a clear seasonal variation in the occurrence rate of SICHs. It was high in early spring(February, March, and Aprll) and early winter(October and December)(P<0.05). In SSAHs, there was no statistically significant differences in the occurrence rate, however. Daily temperatures(average, maximum, and minimum) and mean sea-level barometric pressure were the important climatic factors influencing the occurrence rate of SICHs(P<0.05). The lower daily temperatures(average, maximum, and minimum), and the higher mean sea-level barometric pressure, the more SICHs occurred. In SSAHs, daily average temperature and intradiurnal temperature affected on the occurrence rate(P<0.05), however, there was no climatic factors with a statistically significant correlation. These results suggested that SSAHs differed from SICHs in its pathogenic mechanism. In any events, the dry(high barometric pressure)and cold(low temperature) weather might be a risk factor for the hypertensive patients. To reduce or prevent SICHs, such a hypertensive patient should not go out in dry and cold weather.