다양한 조건의 저압 공정 모니터링을 위한 입자 집속 장치 개발

김명준,김동빈,강상우,김태성,Kim, Myungjoon,Kim, Dongbin,Kang, Sang-Woo,Kim, Taesung 한국입자에어로졸학회 2017 Particle and Aerosol Research Vol.13 No.2

As semiconductor process was highly integrated, particle contamination became a major issue. Because particle contamination is related with process yields directly, particles with a diameter larger than half pitch of gate should be controlled. PBMS (Particle beam mass spectrometry) is one of powerful nano particle measurement device. It can measure 5~500 nm particles at ~ 100 mtorr condition in real time by in-situ method. However its usage is restricted to research filed only, due to its big device volume and high price. Therefore aperture changeable aerodynamic lenses (ACALs) which can control particle focusing characteristics by changing its aperture diameter was proposed in this study. Unlike conventional aerodynamic lenses which changes particle focusing efficiency when operating condition is changed, ACALs can maintain particle focusing efficiency. Therefore, it can be used for a multi-monitoring system that connects one PBMS and several process chambers, which greatly improves the commercialization possibility of the PBMS. ACALs was designed based on Stokes number and evaluated by numerical method. Numerical analysis results showed aperture diameter changeable aerodynamic lenses can focus 5 to 100 nm standard particles at 0.1 to 10 torr upstream pressure.

지하역사 공기조화기 전처리 필터용 축류형 사이클론의 수치해석 및 실험적 평가 연구

김명준(Myungjoon Kim),김호중(Hojoong Kim),김진관(Jin-Kwan Kim),김세영,권순박(Soon-Bark Kwon),김태성(Taesung Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6

Typical Korean subway HVAC (heating, ventilation and air-conditioning) system uses three types of filter(auto suction filter, electrostatic precipitator, auto cleaning demister) as pre-filter. These kinds of filters require high maintenance and effort. To reduce such disadvantages, here we suggest axial-flow cyclone as a new type of pre-filter which has low maintenance, low effort and constant performance which is favorable. Numerical and experimental study are progressed for its evaluation.

『고려사』 『악지』 소재 당악과 속악의 영향론적 탐구와 속악가사의 독자성

김명준(Myungjoon Kim) 한국동서비교문학학회 2015 동서 비교문학저널 Vol.0 No.32

The Sokak article in “Akji” of Goryeosa was illustrated being aware of the Dangak article, which was a result that Goryeo Sokak was changed by an influence of Dangak. The similar number of the Goryeo Sokak article was registered as much as that of Jungjae’s Changsha and Gasa in response to Daegok and Sa of Dangak. Sokak Jungjae was recorded in Holgi like Daegok of Dangak was illustrated as Mudoholgi, and such a trace could be found in a part of Sokak because melody and lyrics of Dangak had various corresponding aspects. Some contents of Dangak and Sokak had ‘political’ songs like blessing because they were both songs of ‘royal court.’ As such, it was confirmed that the Sokak and Dangak articles in Akji of Goryeosa kept close relations between them. Even though Goryeo Sokak was changed by influence of Dangak, independent character of Goryeo could be noticed. The first one is that different from Dangak Gasa, Goryeo Sokak had a free poetic form and chorus·refrain phrase. A song, even a short term one, did not have the same poetic form, and there was no song with same verse in the case of extended style. And, chorus·refrain phrase which played a role to heighten the interest was the formal characteristics retained by Sokak. This was the result of efficient utilization of our mother language [or poetic grammar] and folk songs subject to flexibility of Sokak. The second one is there were many songs forming balance between lord and vassal as well as mutual tension rather than only singing one-sided blessing to the lord. This shows feast songs did not limited to the objective of momentary entertainment but had characteristics of court literature for continuous savor. Like this, Goryeo Sokak maintained its own identity without leaning to Dangak; and, Goryeo and Joseon maximized the effective value from the diplomatic and cultural aspect utilizing Dangak fully.

MBTI Form M의 자가채점과 컴퓨터채점 비교

김명준 ( Myungjoon Kim ),강새하늘 ( Saehaneul Kang ),남한 ( Han Nam ) 한국심리유형학회 2021 심리유형과 인간발달 Vol.22 No.2

본 연구는 MBTI에 관심을 지닌 연구자들 및 MBTI 사용자들을 위하여 이들 두 채점체계의 특징을 비교·소개하고자 하는 목적으로 수행되었다. MBTI Form M은 두 가지 채점 방식을 가지고 있다. 즉 문항반응이론(IRT)에 기반한 컴퓨터 채점과 단일 배점 방식에 기반한 자가채점 방식이다. 구체적 연구내용으로 첫째, 자가채점 방식의 일반적 특징과 선호문자 산출 과정을 기술하고 해당 방식으로 산출한 문항의 양호도와 검사의 신뢰도를 확인하였다. 둘째, 컴퓨터채점 방식의 일반적 특징과 선호문자 산출 과정을 기술하고 해당 방식으로 산출한 문항의 양호도와 검사의 신뢰도를 확인하였다. 특히 MBTI 사용자 및 연구자에게 생소할 수 있는 문항반응이론을 컴퓨터채점 방식에 적용하고 해석하는 방법을 자세히 기술하였다. 셋째, 두 채점체계로 산출한 선호문자의 일치율을 계산하여 지표별 선호를 구분하는 가장 정확한 중간점을 기술하였다. 이와 같은 연구를 위하여 2012년부터 2020년까지 어세스타에 누적된 자료 중 대한민국 인구 분포와 맞게 비례층화 방식으로 표집한 19,070명을 분석에 사용하였다. 주요연구 결과는 다음과 같다. 첫째, 문항의 양호도를 나타내는 자가채점 방식의 선호문자 예언율이 E, I, S, T, J 문자에서 Form G와 비교해 개선된 것으로 나타났으며, 4개 지표의 문항내적합치도 또한 .90 수준으로 나타났다. 둘째, 문항반응이론으로 산출한 3모수를 통해 문항의 양호도를 확인한 결과 변별도 기준으로는 E-I 지표가, 난이도 기준으로는 E-I, S-N 지표가, 추측도 기준으로는 E-I, T-F 지표가 매우 좋은 수준으로 나타났다. 추가로 문항반응이론에서 신뢰도를 의미하는 검사정보함수를 그래프로 산출한 결과 선호도 추정치인 세타(θ)의 중간점 부근에서 가장 많은 정보를 포함하여 선호도가 뚜렷하지 않은 사람들의 유형을 정확히 분류해주는 것으로 나타났다. 셋째, 자가채점과 컴퓨터채점의 선호문자를 비교한 선호지표별 일치율은 96.3%~98.1%로 나타났으며, 자가채점 지표별 문항의 절반을 기준으로 선호지표를 결정할 때 일치율이 가장 높았다. 마지막으로 두 채점절차의 차이로 인해 발생하는 선호문자의 불일치는 대부분 중간범위에서 발생되는 것을 확인하였다. 끝으로 본 연구의 의의와 후속연구 제언을 구분하여 논의하였다. There are two scoring methods in MBTI Form M. One is Item Response Theory (IRT)-based computer scoring method, and the other one is unit-weight based self-scoring method. This study introduces and compares the unique characteristics of those two different scoring methods and summarizes the findings for MBTI users and researchers. In this study, there are three main contributions. First, authors addressed the aspects of self-scoring method and the process of obtaining preference types, and then examined the quality of items. Additionally, the overall reliability of assessment was described. Second, the characteristics of computer scoring method and the process of obtaining preference type were discussed, and the item’s quality and reliability of the assessment were examined. In particular, authors elaborated the details of IRT application to MBTI scoring for audiences, including MBTI users and researchers. Lastly, the preference types’ concordance rate from the two scoring methods was calculated to see the most accurate middle point, which identifies the preference indicator. In total, 19,070 samples were used in this study. The samples were collected from Assesta’s server that contained archived data from 2012 to 2020, and proportional stratified sampling method was used to obtain the final samples. There are three main findings in this study. First, the predictive rate was advanced from E, I, S, T, and J indicators. The predictive rate of preference type (self-scoring method) is an indicator of item’s quality, which was improved in comparison with the same rate from Form G. Additionally, internal consistency of four indicators were found to be .90 or above. Second, each item’s quality was examined by using three parameters from IRT model. Specifically, in terms of the good item indices, item discrimination index was good in E-I indicator, item difficulty index was good in E-I and S-N indicators, and item guessing index was good in E-I and T-F indicators. In addition, test information function, which is the indicator of reliability in IRT, was computed with a graph. The result showed that the majority of information was found near the middle point of theta (θ; preference estimate), which helps in identifying people who do not have a clear preference. Third, the preference type’s concordance rate was 96.3~98.1%, which was compared with the preference results from the computer and self-scoring methods, and the concordance rate was highest when people decided their preference types in the middle of self-scoring items. Lastly, the inconsistencies of preference types due to the differences of two scoring methods was mostly found in the middle range. At the end, the implications of this study and the future research directions were discussed.

공기조화기 장착용 축상유입식 싸이클론의 입자제거효율에 대한 실험적 연구

김세영(Seyoung Kim),권순박(Soon-Bark Kwon),박덕신(Duck-Shin Park),조영민(Youngmin Cho),김진호(Jinho Kim),김명준(Myungjoon Kim),김태성(Taesung Kim) 한국대기환경학회 2011 한국대기환경학회지 Vol.27 No.3

2단 실린더형 싸이클론의 물 및 오일 액적 제거 성능 분석 연구

김수민,김학준,김명준,한방우,우창규,김용진,Kim, Sumin,Kim, Hak-Joon,Kim, Myungjoon,Han, Bangwoo,Woo, Chang Gyu,Kim, Yong-Jin 한국입자에어로졸학회 2017 Particle and Aerosol Research Vol.13 No.3

A novel two stage cylindrical cyclone was developed for a 3 phase separator in shale oil production industry. The cyclone performance was compared with a cone type cyclone and multi cyclone at the same experimental condition using water and oil mists generated by a humidifier and atomizer at the flow rate 1 to $2m^3/min$. The removal efficiency of total suspended water droplets by the novel cyclone, calculated using inlet and outlet concentrations measured by an optical particle counter, was 99% which is higher than 90% of oil droplet removal efficiency at $2m^3/min$. It might be due to the evaporation of small water droplets during the tests. The water and oil droplet removal performance of the novel cyclone based on the quality factor which is a function of pressure drop and removal efficiency was the highest among three cyclones. The results indicate that the cyclone could be an economical device to remove water and oil mists from shale gas generation processes where a huge three phase separator is commonly used.

LiDAR 기반의 딥러닝을 이용한 차량 분류 알고리즘

김수연(Suyeon Kim),권순웅(Sunwoong Kwon),김명준(Myungjoon Kim),김정하(Jungha Kim) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

Autonomous vehicles requires quick and accurate perception of the surrounding environment. Thus many researches on perception system for autonomous vehicles using various sensors such as LiDAR, RADAR, and Camera are being conducted. In this paper, we propose a LiDAR based vehicle classification method using deep learning for autonomous vehicles. The proposed classification method firstly eliminates the ground data of the raw point cloud to reduce the amount of data. After that, an squeezeseg v2 algorithm is conducted for the classification of vehicle and euclidean clustering is applied to robustly correct the classified vehicle data. As a result, we have classified the vehicles robustly using this algorithm, and it can be used in the situation such as highway.

전국 지하역사 공기조화기 에어필터 현황 및 현장 성능평가 방법 개발

김세영(Se-Young Kim),권순박(Soon-Bark Kwon),김명준(Myungjoon Kim),김태성(Taesung Kim),신창헌(Chang-Heon Shin) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6

Management of indoor air quality of underground subway station is an important issue. The air handling unit (AHU) installed in the underground subway station is the main facility determining the air quality of station. Especially for removing particulate matters, it is important to operate the appropriate air filter. However, there is no quantitative test method for existing air filter in site. It is rarely known that the collection efficiency of air filter can satisfy the designed criteria or not. In this study, we surveyed the particle removal systems and we set the reference method using the mini-volume air sampler inside the AHU to evaluate the collection efficiency of different types of air filters. In addition, we applied the portable instrument based on the light-scattering method to the efficiency test. The method we applied in this study can be used in the evaluation of air filter in site.

MIDAS-Ⅱ에서 3차 저장 장치를 위한 볼륨 구조의 설계 및 구현

김영성(YoungSung Kim),강현철(Hyunchul Kang),김명준(MyungJoon Kim) 한국정보과학회 1999 정보과학회 컴퓨팅의 실제 논문지 Vol.5 No.6

MIDAS-Ⅱ는 한국전자통신연구원에서 개발한 바다 DBMS의 저장 시스템이다. MIDAS-Ⅱ 볼륨(volume)은 데이타의 논리적 저장 단위인 화일을 저장하는 영역을 가리킨다. 본 논문에서는, MIDAS-Ⅱ가 대용량 멀티미디어 데이타 서버의 저장 시스템으로 기능하도록 광 디스크 쥬크박스 또는 테이프 라이브러리와 같이 복수 개의 저장 매체 (pltter, 예를 들어 디스크 또는 카트리지 테이프)로 구성된 Tera 바이트 급의 3차 저장 장치를 장착할 경우 이를 위한 볼륨 구조의 설계 및 구현에 대해 기술한다. 본 논문에서 제안한 볼륨 구조는 3차 저장 장치 접근 시 성능 제고를 위하여 디스크 캐쉬 영역을 두고 있으며, 3차 저장 장치의 저장 매체별 관리 기능을 제공한다. MIDAS-Ⅱ is the storage system for BADA DBMS developed at ETRI A volume of MIDAS-Ⅱ is the area where the files, the logical unit for storing data, are stored. This paper describes the design and implementation of a new MIDAS-Ⅱ volume structure for the tertiary storage device such as an optical disk Juke box or a tape library equipped with multiple platters(disks or cartridge tapes, for example). Incorporating the tertiary storage device of the order of tera bytes into MIDAS-Ⅱ enables it to function as a storage system for a massive amount of multimedia data server. The volume structure for the tertiary storage device proposed in this paper features disk caching for performance improvement and direct control of the individual platter.

도심지역 데이터센터의 폐열활용에 관한 연구 - 공동주택 급탕설비 적용성 및 효과 분석 -

장승민(Jang, Seungmin),김명준(Kim, Myungjoon),박세현(Park, Saehyun),박홍열(Park, Hongyeol),전유민(Jeon Yumin),조진균(Cho, Jinkyun) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.2