http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Generation of ray class fields of imaginary quadratic fields
정호윤(Ho Yun Jung) 충청수학회 2021 충청수학회지 Vol.34 No.4
Let K be an imaginary quadratic field other than Q(sqrt(-1)) and Q(sqrt(-3)), and let O_k be its ring of integers. Let N be a positive integer such that N=5 or N≥7. In this paper, we generate the ray class field modulo NO_K over K by using a single x-coordinate of an elliptic curve with complex multiplication by O_K.
정호윤(Ho-Yun Jung),이연원(Yeon-Won Lee),김영덕(Young-Duk Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
The wind turbine system is divided by two types. One is horizontal axis wind turbine and the other is vertical axis wind turbine. Typical types of vertical wind turbine are Darrieus type and Savonius type, etc. The Darrieus type is driven by lift force and Savonius type is driven by drag force. The objective of this study is to investigate the aerodynamic characteristics of a new type vertical axis wind turbine blade as the basic study of a design of a vertical axis wind turbine and to estimate the efficiency of wind turbine.
정호윤(Jung, Ho-Yun) 영남대학교 인문과학연구소 2017 人文硏究 Vol.- No.79
이 연구는 중국 문화대혁명 시기인 1966년부터 1970년 사이에 연변에서의 문화대혁명이 민족갈등으로 나아가는 과정과 당시 북한과 중국의 외교상황(1966~ 1970년)을 연결지어봄으로써 소수민족지역 문화대혁명의 다양한 양상을 검토하였다. 문혁 초기인 1966년 연변에서는 문혁 이전에 발생했던 반우파투쟁의 결과로 역사문제에 대한 조반을 일으켜 계층, 신분적 변화를 희망한 조반파와 보수파인 홍위병이 등장하게 된다. 1967년 이후 연변 문혁에서의 민족갈등이 첨예화되는 과정에 있어 당시 북한과 중국과의 관계는 중공당국의 문혁이라는 혼란한 상황의 정리과정이 ‘민족’ 문제로 진행되는 모습을 보여준다. 이는 다른 방법보다 더 강한 일체화이론의 계기를 타의적으로 마련해주었고, 결국 이로 인해 소수민족자치주인 연변에서는 중공당국에 반하는 인사들이나 대중들이 특무, 반역자, 매국역적 등의 죄로 덧씌어져 탄압당하는 결과를 초래하게 되었다. 문혁과정에서 변경지역을 제외한 다른 지역은 계급투쟁과 중공중앙에 대한 비판이 뚜렷이 드러나는 데 반해, 소수민족에서의 문혁은 계급투쟁과 중공중앙에 대한 비판적 사고가 민족문제로 모두 흡수되어버리는 과정을 보인다. 이러한 중국 문혁시기 연변을 포함한 소수민족 지역은 타자(他者)적 이미지를 거치면서 이들 지역에 대한 신중국의 영토적 통합력이 대폭 제고되는 과정을 겪게 되었다. In this Study, I examined the process of the Chinese Cultural Revolution in Yanbian from 1966 to 1970, and the diplomatic situation between North Korea and China(1966-1970). I’m doing so, I reviewed various aspects of the Cultural Revolution in a minority race area. In particular, people’s historical problems about the result of the anti-right struggle that occurred before the Cultural Revolution. They had were divided in to two groups: rebel groups who hoped for a change in class, and the Red Guards who appeard to uphold conservative values. In the process of the rising national conflict since 1967, the relationship between North Korea and Chin a at that time shows the resolution of the "national" problem in the chaotic circumstances facing the Chinese authorities. This resulted in a stronger unification of the integration as compared with other methods. As a result, in the Yanbian, a minority self- governing state, the people and the public opposed to the Chinese authorities were trapped and repressed by the crimes of specialism, traitors. The Cultural Revolution in a minority race area shows the process of class struggle and critical thinking about the Chinese Communist Party being absorbed by the national problem.
원심 오일 정화기의 유동 특성 및 여과효율 증대를 위한 개선연구
정호윤(Ho-Yun Jung),최윤환(Yoon-Hwan Choi),이연원(Yeon-Won Lee),도덕희(Deog-Hee Doh) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
The centrifugal oil purifier is used in ships for purifying the engine lubrication oil. The momentum needed for the rotation of the cylindrical chamber is obtained by jet injections. The dust particles in the oil are separated by the centrifugal forces moving to the inner wall of the rotating cylindrical chamber body. The dust particles are eliminated when the particles are adsorbed onto the surface of the inner wall of the chamber body. the flow characteristics and the physical behaviours of particles in this centrifugal oil purifier have been investigated numerically and the filtration efficiencies have been evaluated. For the calculations, a commercial code has been used and the SST k-ω turbulence model has been adopted. the MRF(Multiple Reference Frame) method has been introduced to consider the rotating effect of the flows.
정호윤(Ho-Yun Jung),박재성(Jae-Sung Park),강진수(Jin-Soo Kang),윤희철(Hee-Chul Yun),이연원(Yeon-Won Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Recently, we have many problems on the process of the sludge. In past, the sewage sludge was treated by reclaimed land or thrown away in the sea. But these methods caused environmental pollution. Today, many researchers are studying various methods for reducing its volume. One of these method, this study is to reduce the moisture of sewage sludge and to solidify it using a dryer and curing equipment. In this research, we investigated about design parameter and operation condition of the equipment The curing equipment reduces the percentage of water content from 30% of dryer to 10%. So, we have to study the curing characteristics and performance of curing equipment. For example, there are internal flow characteristics and change of the percentage of water content. And we investigated the change of data at outlet along the initial condition, temperature, humidity and air flow. Using this data, we achieve the experimental results of curing efficiency by each geometry and operating condition. And we also investigated numerical analysis of internal flow using CFD code. This research is basic study for optimal design of the curing equipment.
MnO2 부착 방식에 따른 3D 프린팅 광합성 전극의 특성 및 성능 분석 연구
정호윤(Ho Yun Jung),김용재(Yong Jae Kim),김선일(Seon Il Kim),윤재형(JaeHyoung Yun),류원형(WonHyoung Ryu) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Despite the harvesting of photosynthetic electrons (PEs) directly from thylakoid membrane has been studied for decades, practical usage of photosynthetic energy has been limited. One of the challenges is insufficient photosynthetic electrons harvesting due to small surface area of electrodes and inefficient charge storage performance. Here, we 3D printed electrodes with graphene oxide ink and modified its surface with MnO₂ deposition to enhance the extraction of PEs from thylakoids and capacitance of supercapacitors. Deposited MnO₂ layers served as a pseudocapacitive material and modify surface properties of electrode. The structure and surface property of the deposited manganese oxide were investigated by X-ray diffraction analysis and scanning electron microscopy (SEM). The capacitive characteristics of the electrode were studied by cyclic voltammetry and current charge-discharge test. Both capacitive and surface characteristics were influenced by the deposition method of MnO₂. As a result of performance test, highest specific capacitance value of 370F/g and 600 ∕ ㎠ photosynthetic current density were obtained at potentiodynamic deposition at 400mV/s condition. This suggests the excellent supercapacitor and bioanode performance of 3D printed electrode with MnO₂ deposition.
정호윤(Ho-Yun Jung),이연원(Yeon-Won Lee),김영덕(Young-Duk Kim) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
The wind turbine system is divided by two types. One is horizontal axis wind turbine and the other is vertical axis wind turbine. Typical types of vertical wind turbine are Darrieus type and Savonius type, etc. The Darrieus type is driven by lift force and Savonius type is driven by drag force. The objective of this study is to investigate the aerodynamic characteristics of a new type vertical axis wind turbine blade as the basic study of a design of a vertical axis wind turbine and to estimate the efficiency of wind turbine.