산란을 고려한 수중 프로펠러 소음해석

김종도(Kim, Jong-Do),홍석윤(Hong, Suk-Yoon),송지훈(Song, Jee-Hun) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.5

Underwater radiated noises from marine vehicles are mostly due to the propulsion systems. Recently, the propeller noise problems are becoming crucial issues in terms of habitability of passenger ships. Especially in military area, propeller noise is directly related to the survivability of submarines and warships, and thus propeller noise analysis and reductions are very important. Generally, propeller noise can be classified into non-cavitating noise and cavitating noise which is dominant. In this paper the methodology of propeller noise analysis is announced and new approach to consider scattering effect is proposed. Unsteady blade surface pressure and sheet cavity volume analyzed with potential based panel method are used as noise source.

자동차 배기가스 중 입자상 탄소성분 내 PAHs의 정성적 비율 추정

김종범(Jong Bum Kim),이경빈(Kyoung Bin Lee),김진식(Jin Sik Kim),김창환(Chang Hwan Kim),차용호(Yong Ho Cha),권순박(Soon Bark Kwon),배귀남(Gwi Nam Bae),김신도(Shin-do Kim) 한국대기환경학회 2014 한국대기환경학회지 Vol.30 No.5

무방향성 적층 전기강판의 펄스 Nd:YAG레이저 용접특성

김종도(Jong-Do Kim),이창제(Chang-Je Lee),김영식(Young-Sik Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.6

Manufacture of motor by laser has been studying realization that was demands on market for lightening and miniaturization. Moreover, early in the 1980s, manufacture of parts for automobiles by laser welding was already successfully introduced. The purpose of this study was to develop production technology of the high quality laminated stator core for motor by pulsed Nd:YAG laser heat source. In the event of adjusting defocus and voltage to control humping in laser welding of the laminated core, sound bead could be obtained, but deep penetration was not. Therefore, explosive evaporating plasma was controlled by adjustment of peak power on pulse width. Particularly, because explosive evaporating plasma induced high peak power, made molten metal in keyhole scatter, a suitable adjustment of peak power was required to obtain sound bead. As a results of experiment, sound bead and deep penetration could be obtained.

대형 컨테이너선의 거주구 위치에 따른 선원 안락성 평가

김종도(Jong-Do Kim),김태영(Tae-Young Kim),김봉재(Bong-Jae Kim) 한국소음진동공학회 2017 한국소음진동공학회 논문집 Vol.27 No.3

외부 가진력의 주파수에 따른 강제진동시스템의 특성

김종도,윤문철,Kim, Jong-Do,Yoon, Moon-Chul 중소기업융합학회 2021 융합정보논문지 Vol.11 No.9

주파수를 갖는 외부 가진력에 의하여 강제 진동의 특성을 가진력의 진폭과 주파수에 따라 그 특성을 분석하였다. 변위, 속도 및 가속도를 얻기 위해 수치해석을 수행하여 주파수 응답을 얻었고 특히 주파수 영역에서 시스템 고유진동수와 가진 주파수의 발생 위치를 밝히고자 각각의 FRF의 분석을 하였다. 외부 가진에 의한 진동모델에서 변위, 속도 및 가속도의 거동과 주파수 응답함수에서 고유진동 주파수와 주변의 가진 모드 분포도 파워 스펙트럼과 실수부와 허수부의 FRF 에서 나타났으며 각 모드 특성도 구하였다. 진동의 응답은 가진 신호의 크기와 주파수를 주어 정현파의 가진력으로 외부 가진력을 근사화 하였고 이런 가진력에 의하여 발생하는 모드를 구별할 수 있었다. 상당 질량, 감쇠 및 강성을 변화시켜 수치 분석 후 외부 가진력에 의한 강제 진동 응답 특성을 체계적으로 분석하였다. The characteristics of forced vibration by an external excitation force having a frequency were analyzed according to the amplitude and frequency of the excitation force. To obtain displacement, velocity, and acceleration, numerical analysis was performed to obtain the frequency response, and in particular, each FRF(Frequency Response Function) was analyzed to reveal the location of the system natural frequency and excitation frequency in the frequency domain. In the vibration model caused by external excitation, the natural frequency and distribution of the surrounding excitation mode in displacement, velocity and acceleration FRF. The FRF was also shown in the power spectrum and FRF of real and imaginary parts. The external excitation force was approximated with the excitation force of a sine wave by giving the amplitude and frequency, the mode generated by this excitation force could be distinguished. After numerical analysis by changing the equivalent mass, damping and stiffness, the forced vibration response characteristics by external excitation force were systematically analyzed.

API강재의 파이버레이저 용접시 유기하는 플라즈마의 방사특성 (IV) - 키홀의 주기운동과 FFT분석의 상관성 -

김종도,이창제,서정,Kim, Jong-Do,Lee, Chang-Je,Suh, Jeong 대한용접접합학회 2013 대한용접·접합학회지 Vol.31 No.4

The effects of laser welding beam quality is very large. However, not an analysing case was found for the difference on the plasma emission signal during laser welding according to the beam quality. Therefore, in this study, we compared and evaluated penetration and signal change according to the beam quality at the a similar wavelength band by using a fiber laser and Nd:YAG laser. In addition, we took high speed videography in order to make sure that FFT analysis reflects the actual motion period of keyhole and found the period of video analysis and FFT mostly matched. As a result, it is expected to secure higher reliability than evaluating signal intensity when appling FFT to monitoring.

A Web-based 'Patterns of Care Study' System f or Clinical Radiation Oncology in Korea

김일한(Il Han Kim),지의규(Eui Kyu Chie),오도훈(Do Hoon Oh),서창욱(Chang-Ok Suh),김종훈(Jong Hoon Kim),안용찬(Yong Chan Ahn),허원주(Won-Joo Hur),정웅기(Woong Ki Chung),최두호(Doo Ho Choi),이재원(Jae Won Lee) 대한방사선종양학회 2003 Radiation Oncology Journal Vol.21 No.4

목 적: PCS 연구의 목적은 임상 방사선치료 QA의 표준 연구수단을 구축하고,방사선치료과 정의 기본요소를 결정하고, 협동 임상시험의 기반을 제공하고,외국과의 비교 연구를 위한 기본자료의 구축에 있다.우리나라 임상 방사선종양학의 PCS 연구기법으로서 구축한 웹 기반의 PCS시스템의 개발 및 특성을 보고하고자 한다. 대상 및 방법 : 본 시스템은 메인서버와 외부에 구축한 2중 백업서버로 구성되어 있다. 리눅스 운영 체제 및 MySQL 데이터베이스를 이용하여 프로그램을 완성하였다. PCS 대상이 되는 종양으로서의 개발 우선 순위는 1989년부터 1999년 사이에서 우리나라 전국의 방사선종양학과에서 치료빈도가 많은 순서를 근거로 결정하였다. 결 과: 2003년 초반에 웹 기반의 임상 PCS시스템이 구축되었다. 웹 주소는 www.pcs.re.kr이며, 우 선 유방암,직장암,식 도암, 후두암, 폐암 및 전이성 뇌종양을 대상으로 하였다. 완성된 개발 항목의 수는 1,000항목을 상회하였다.구축된 시스템은 사용자 편의성 충족, 기입 내용 중복 확인, 자료 기밀성, 자료 보존 및 사본 작성,이중 백업,통계 분석 지원 등 을 구현하였다. 문자화된 자료 외에 영상자료도 입력되도록 시스템을 구축하였다.아울러,임상시험승인 관련양식 지원, 무작위 자료 추출,방사선종양학과의 구조적 요소 파악 기능도 갖추었다. 결 론: 본 시스템은 PCS분야에서는 최초로 구축되고 작동되는 웹 기반 시스템이다.구축한 시스템을 통해서 단시간 내에 표본 자료의 수집이 가능하여 시간 및 비용을 절약할 수 있게 되었으나 구축자료의 신뢰도 확인을 별도의 검증과정은 필수적이다. 본 연구팀이 개발한 본 웹기반시스템은 향후 PCS 연구 또는 자료수집이 필요한 유사연구상황에 응용될 수 있는 표준적인 기법으로서의 활용되기를 희망한다. Purpose We report upon a web-based system for Patterns of Care Study (PCS) devised for Korean radiation oncology. This PCS was designed to establish standard tools for clinical quality assurance, to determine basic parameters for radiation oncology processes, to offer a solid system for cooperative clinical studies and a useful standard database for comparisons with other national databases. Materials and Methods: The system consisted of a main server with two back-ups in other locations. The program uses a Linux operating system and a MySQL database. Cancers with high frequencies in radiotherapy departments in Korea from 1998 to 1999 were chosen to have a developmental priority. Results: The web-based clinical PCS system for radiotherapy in www.pcs.re.kr was developed in early 2003 for cancers of the breast, rectum, esophagus, larynx and lung, and for brain metastasis. The total number of PCS study items exceeded one thousand. Our PCS system features user-friendliness, double entry checking, data security, encryption, hard disc mirroring, double back-up, and statistical analysis. Alphanumeric data can be input as well as image data. In addition, programs were constructed for IRB submission, random sampling of data, and departmental structure. Conclusion: For the first time in the field of PCS, we have developed a web-based system and associated working programs. With this system, we can gather sampled at a in a short period and thus save, cost, effort and time. Data audits should be performed to validate input data. We propose that this system should be considered as a standard method for PCS or similar types of data collection systems.

영상도식변형 연구

김종도(Kim Jong do) 현대문법학회 1998 현대문법연구 Vol.12 No.-

This paper is designed to show an appropriate way to analyse polysemie phenomena by taking a process morpheme. -er as an example. And it emphnsises that their appropriate analysis could be achieved when it is based on the schemathic network categorization model. The model is thought to be able to avoid the problems posed by the traditional categorization and the prototype model. -er is thought to have there contextual meanings: agent, instrument and setting. These meanings can be connected through image-schema transformations. Three schemas which represent their respective meanings can be united through the superschema. On the other hand, the present tense is thought to be polysemous. But its polysemy is caused by transformations applied on another grammatical category aspect. In this point the present tense is not polysemous. This paper also shows that image-schma transformations work on all the grammatical levels, for they are not the superficial grammatical gimmics, but mental activities. Thus all the grammatical phenomena should be analysed ultimately on the base of cognitive activities.

세계화에 대응하는 사우디아라비아의 역동성에 관한 연구

김종도(Kim, Jong-Do),정영규(Jeong, Young-Kyu) 명지대학교 중동문제연구소 2012 중동문제연구 Vol.11 No.4

Saudi Arabia (Saudi Arabia) as well as oil discoveries in terms of the energy industry in the 20th century until now formed the large axis of the world economy. In particular, Saudi Arab countries through free trade of goods, services, capital and human resources of economically important. To participate in a variety of organizations, including the international community in Saudi Arabia as a result of these open economy in terms of economic structure system are built. Saudi Arabia through the rich oil resources and an open economic system, and laying the foundation of the knowledge-based society. The oil boom of modern education in the United States and Europe as study abroad, the first generation to take a leadership role in the society began. On the other hand, look at the status of Saudi Arabia's economy, FY 2012 Compared in 2011, and 6,900 billion Riyal to 7,020 billion Riyal and appropriations, and is forecast revenues by 30%, appropriations increased by 19%. 1,680 billion Riyal to the maximum of the budget sector, which accounts for the middle of the education and training sector budget, which occupied 23.3% of the entire government of Saudi Arabia is a glimpse of the passion for the education sector. Effectively respond to external shocks of the global financial crisis, the Saudi economy through competitiveness in the financial industry, including by ‘globalization’ in the well-adapted to. First, Saudi Arabia's competitiveness in the banking industry, such as the characteristics of the economic system of the Saudi Arabia Monetary Authority (SAMA) in the role of financial markets. Second, the development of the Saudi banking system is well presented. Especially during the past half-century, the Saudi banks and SAMA, Saudi Arabia has played an important role in the growth of the financial system. Saudi characterized by the growth of the financial industry has emerged. In this regard, the times separated by generator early years, growing up in the 1970s, 1980s, and the beginning of the golden era of the 1990s, such as the development of the Saudi financial industry can be divided into four parts. In this paper, a step-by-step look at the characteristics of the process of growth of the financial industry in Saudi.

어학 : 쿠르드어 연구 -소라니 방언을 중심으로-

김종도 ( Jong Do Kim ) 한국아랍어아랍문학회 2005 아랍어와 아랍문학 Vol.9 No.1