적외선흡수기를 위한 AI 다층박막의 적외선 반사특성

趙南仁(Nam-Ihn Cho) 대한전기학회 1998 전기학회논문지 Vol.47 No.2

한국어의 발음 지각 능력 평가가 갖는 타당성과 효용성에 관한 연구

조남인 ( Nam-min Cho ) 한국언어문화교육학회 2011 언어와 문화 Vol.7 No.3

This research points out the necessity to introduce and enhance the evaluation of pronunciation ability in Korean language education. Pronunciation education and evaluation has not been sufficient in Korean language education. One of the reasons for this insufficient pronunciation education is that pronunciation test is not included in official Korean language tests or in-house tests, and, even when it is included, the methodology is not consistent and the portion is relatively small. Therefore, to develop pronunciation education in Korean, we need to include pronunciation test not only in a language institution but also in a representative Korean proficiency test like TOPIK. So far, pronunciation test in Korean language has been a part of speaking test, and has been dependent on speaking test. However, this research proves the possibility evaluating language learners’ pronunciation capability through the perception test. In this research, the survey of phonetic production and perception tests was conducted on Chinese native students who learn Korean. This research would show the possibility of utilizing pronunciation test as a pre-phase before introducing ‘pronunciation test as a part of speaking test'. Also, considering various factors including reliability, objectivity, validity, and economics of the tests, this would be a method with reasonable practicability and validity. (EwhaWomansUniversity)

서울시 일부 노인요양기관 종사자의 구강보건지식 및 행태

조남인 ( Nam In Cho ),박소영 ( So Young Park ),이흥수 ( Heung Soo Lee ),오효원 ( Hyo Won Oh ) 대한예방치과·구강보건학회 2013 大韓口腔保健學會誌 Vol.37 No.1

Objectives: The aim of this study was to analyze the level of knowledge on oral health and oral health behavior among nursing home employees. Methods: A self-reported survey was conducted for 480 workers in nursing care and residential care facilities for the elderly in Seoul, Korea. Results: The results showed that nursing home employees had more knowledge about denture management than about periodontal diseases. The perception of their own oral health and their level of concern about oral health were different among employees depending on their marital status, job tenure, and income. The average frequency of tooth brushing was 3.05 times per day. Employees with higher income visited the dentist more often. Conclusions: Oral health education should be improved so that nursing home employees have the desirable level of knowledge about oral health and exhibit appropriate oral health behavior.

실리콘과 코발트 박막의 계면구조에서 발생하는 l/f 잡음현상 연구

조남인(Nam-Ihn Cho),남형진(Hyoung Gin Nam),박종윤(J. Y. Park) 한국진공학회(ASCT) 1996 Applied Science and Convergence Technology Vol.5 No.1

실리콘 모재 위에 증착된 코발트 박막의 l/f 잡음 발생 메카니즘을 미시적 관점에서 살펴보았다. 코발트 박막은 p형 (100) 실리콘 위에 고진공에서 전자빔 증착기술에 의해 준비되었으며, 코발트 박막에 대한 표면저항 측정 및 전자회절 패턴 관찰과 더불어 l/f잡음전력 스펙트럼밀도를 액체질소 온도에서 측정하였다. 측정된 잡음전력 스펙트럼 밀도는 계면박막의 구조적인 전환 영역과 금속성 성질로의 전환 영역에서 가장 큰 값을 나타냈으며, 다결정의 코발트 실리사이드가 핵생성된 후 잡음밀도의 크기는 10^(-4)배 이하로 급격히 감소하였다. 이 잡음변수는 계면박막의 구조적 불안정성을 나타냄을 알 수 있었다. We present a microscopic description for generation of l/f noise in interfaces between cobalt thin film and silicon substrate. Along with surface resistance measurements and transmission electron diffraction observations, l/f noise power spectral density has been measured for the interfacial structures at the liquid nitrogen temperature. The cobalt films have been deposited by the electron-beam evaporation technique onto p-type (100) silicon in the high vacuum condition. The measured noise power spectral density shows highest magnitude near the structural transition and metallization transition region. The noise magnitude rapidly decreased after the cobalt silicide nucleation. The noise parameter is concluded to be originated from the structural fluctuations.

증착조건에 따른 undoped ZnO 박막의 특성 변화

남형진,이규항,조남인,Nam, Hyoung-Gin,Lee, Kyu-Hwang,Cho, Nam-Ihn 한국반도체디스플레이기술학회 2008 반도체디스플레이기술학회지 Vol.7 No.3

In this study, we investigated variations in undoped ZnO thin film properties with working pressure, $O_2$/Ar ratio, and annealing ambient. Higher vacuum pressure during deposition was observed to bring about slower growth rate resulting in samples with better crystallinity as well as hole generation efficiency through formation of shallower oxygen interstitial. Given that $O_2$/Ar ratio is greater than unity, O provided from the ambient to ZnO during annealing was found to preferably situate at interstitial sites. When He was used for the second annealing, significant changes were not observed. On the other hand, O ambient caused increased density of oxygen interstitial, thereby making the film more intrinsic-like high resistivity ZnO.

일부 노인요양원 종사자의 재원노인에 대한 구강건강관리행태

박소영 ( So Young Park ),조남인 ( Nam In Cho ),주현정 ( Hyun Jeong Ju ),이선호 ( Sun Ho Lee ),오효원 ( Hyo Won Oh ),이흥수 ( Heung Soo Lee ) 대한예방치과·구강보건학회 2013 大韓口腔保健學會誌 Vol.37 No.4

Objectives: The objective of this study was to investigate the oral health care behavior of nursing home employees caring for elderly residents. Methods: Subjects were 480 nursing home workers living in Seoul recruited using convenience sampling. They completed a self-report survey. Results: Results showed that 84.6% of respondents reporting having brushed the teeth of the elderly residents, while 81.7% brushed their dentures. Further, 62.3% reported having received at least one session of oral health care training. When asked to identify the problem with oral health care for the elderly residents, the most common answer was “lack of knowledge on oral health care.” Further, respondents most frequently found “proper way of brushing teeth” followed by “methods to prevent periodontal diseases” the oral care topics on which they needed information. Conclusions: It is necessary to develop an oral health care education program for employees of nursing homes for elderly adults.

IR Sensor에 응용되는 다층 박막의 반사 특성

오순영(Soon-Young Oh),조남인(Nam-Ihn Cho) 대한전자공학회 1997 대한전자공학회 학술대회 Vol.1997 No.6

청색 유기발광층 두께에 따른 2-파장 방식의 백색 유기발광 소자의 광학적 특성

박찬준(Chan-Jun Park),조남인(Nam-Ihn Cho),송영욱(Young-Wook Song) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.6

2-wavelength type white OLEO devices have been made consisted of two layers; a layer with blue light emitting DPVBi host and other EML layer with yellow emitting rubrene dopant. New method to get white emitting device has been suggested by varying thicknesses of the DPVBi layer. The ITO/2-TNATA(150A)/NPB(350A)/DPVBi(35A)/DPVBi:rubrene (2wt%,200A)/DPVBi(100A)/Alq3(50A)/LiF(5A)/Al(1000A) structure has showed optimum results in CIE coordinates of (0.3233, 0.33). OLED devices with this structure has properties of 1.2d/㎡ at turn-on voltage of 3.9V and 1037cd/㎡ at 7.9V. This structure has advantages of simple fabrication and easy to emit the white color.

초고집적회로를 위한 구리박막의 화학적 형성기술

박동일(Dong Il Park),조남인(Nam-Ihn Cho) 한국진공학회(ASCT) 1997 Applied Science and Convergence Technology Vol.6 No.1

0.25 ㎛ 이하의 최소선폭을 갖는 초고집적회로에 사용할 수 있는 구리박막의 형성기술을 조사하였다. 본 실험에서는 측면박막 형성에 적합한 화학적 증착을 시도하였으며 (hfac)Cu(VTMS) (hexafluoroacetylacetonate vinyltrimethylsilane copper(Ⅰ))로 명명된 금속유기 화합물을 원료로 사용하였다. 구리박막의 형성은 TiN와 SiO₂ 모재 위에 이루어 졌으며, 형성 중에 모재의 온도와 증착용기 내 압력의 함수로서 집적회로 공정상 주요 변수인 박막의 비저항, 박막의 증착선택도를 측정하였다. 구리박막은 모재온도 180℃와 증착용기의 압력 0.6 Torr의 조건에서 가장 좋은 전기적 성질을 보여 주었다. 이 조건에서 형성된 구리박막은 다결정 구조를 나타내었으며 구리박막의 증착속도는 120 ㎚/min, 비저항은 2.5 μΩㆍ㎝, 평균 거칠기는 15.5 ㎚로서 0.25 ㎛ 이하 선폭의 집적회로에서 요구되는 전기적, 재료적 사양에 근접한 구리박막을 얻었다. 또한 140-250℃의 모재 온도 범위에서 TiN 모재와 SiO₂ 모재 사이에 뚜렷한 증착선택성이 관측되었다. We have investigated the formation techniques of copper thin films which would be useful for sub-quarter-micron integrated circuits. A chemical vapor deposition technology has been tried for the better side wall formation of the thin films, and a metal organic compound, named (hfac)Cu(VTMS) (hexafluoroacetylacetonate vinyltrimethylsilane copper(Ⅰ)) was used as the precursors. We have deposited the copper thin films on TiN and SiO₂ substrates. The film resistivity and deposition selectivity have been measured as functions of substrate temperature and chamber pressure. Best electrical properties were obtained at 180℃ of substrate temperature and 0.6 Torr of chamber pressure. Under the optimun deposition conditions, polycrystalline copper structures were observed to be grown, and the deposition rate of 120 ㎚/min was measured. The electrical resistivity as low as 2.5 μΩㆍ㎝, and the surface roughness of 15.5 ㎚ were also measured. These are the suitable electrical and material properties required in the sub-quarter-micron device fabrication. Also, in the substrate temperature range of 140-250℃, high deposition selectivity was observed between TiN and SiO₂.

ZnO/Si SIS 이종접합의 전기적 성질

왕진석(Jin Suk Wang),조남인(Nam In Cho) 대한공업교육학회 1983 대한공업교육학회지 Vol.8 No.2

It is shown that efficient solar cells using oxide ZnO on single crystal silicon can be made by rf sputtering, The optical transparancy and ease of preparation of these films is excellent and the conductivity can easily be brought within the appropriate range of solar cell use by heat treatment in H₂. The transmission is typically 80 percent averaged over visible range. The open circuit voltage and fill factor is decreased, and the short circuit current is increased with increasing heat treatment temperature. The maximum conversion efficiency can be obtained when ZnO/Si device is heated at 350(℃) in H₂, 10 min and ZnO thickness is 5,000(Å).