3상 전압인가형 중첩방전 오존발생기의 오존생성 상승효과

이병준,이상근,송현직,김영훈,박원주,이광식,Lee, Byeong-Jun,Lee, Sang-Geun,Song, Hyeon-Jik,Kim, Yeong-Hun,Park, Won-Ju,Lee, Gwang-Sik 대한전기학회 2000 전기학회논문지C Vol.54 No.12

Nowadays, ozone is mainly utilized for water treatment and home equipments. Although the demand for ozone is increasing, the ozone yield of silent discharge type ozonizer is low. Therefore, it is expected to improve the energy efficiency and ozone yield of an ozonizer. In this paper, a new ozone generation system is proposed. The 60[Hz] three-phase voltage is applied to three-phase superposed discharge type ozonizer(3PSDO) which has three electrodes(central, internal and external electrodes). There is no discharge pause time when three-phase voltage is applied due to 120-degree phase difference of applied voltage. The synergy effect of the three-phase superposed discharge type ozonizer is investigated by comparing with the three sort of single-phase discharge type ozonizer(1PDO). So, three-phase superposed discharge type ozonizer is able to obtain high ozone yield, and optimize discharge space, because this can increase the discharge power at low applied voltage.

수도권 소재 일부 의료기관의 인턴물리치료사 관련 실태

이병준,윤미정,이경숙,이황재,이완희,Lee, Byung-Joon,Yun, Mi-Jung,Lee, Kyoung-Suk,Lee, Hwang-Jae,Lee, Wan-Hee 대한물리치료학회 2013 대한물리치료학회지 Vol.25 No.2

Purpose: The purpose of this study was to provide information and suggestions for improvement of the intern physical therapist. Methods: I used 'intern physical therapist' as a keyword, and searched using the Google Search Appliance. Hospitals in the Seoul metropolitan region were selected. Twenty six hospitals that operate the intern physical therapist system were selected. A survey was conducted using questionnaires from August 20, 2012 to August 30, 2012. Among the 26 submitted questionnaires, 24 responded, and the results were analyzed using IBM SPSS Statistics 19.0. Results: 1. Education: (1) Sexual harassment prevention training, infection control training was lower at the rehabilitation hospital and semi hospital than at the university hospital and general hospital. (2) The rehabilitation hospital provided more education for intern physical therapists than the university hospital. (3) University hospital practice location was more diverse than that of the rehabilitation hospital. (4) In the rehabilitation hospital, education of practical skill was somewhat higher. 2. The employment rate of people who have completed an internship was higher in the rehabilitation hospital than the university hospital. Conclusion: Trial employment is more reasonable than intern physical therapist at the semi general hospital and rehabilitation hospital. Council is needed for decisions regarding internship training curriculum.

레이저유도 형광법을 이용한 화염내 OH 농도분포 계측

이병준,길용석,정석호,Lee, Byeong-Jun,Gil, Yong-Seok,Jeong, Seok-Ho 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.2

Laser applied combustion diagnostic techniques-laser induced fluorescence (LIF) and coherent anti-Stokes Ramann spectroscopy (CARS)-are demonstrated. The profiles of hydroxyl radical (OH) and temperature in the counterflow burner are measured and compared with the numerical results. OH radical is excited on the Q$_1$(6) line of the $A^2$$\sum^+$$\leftarrow$$X^2{\prod}$(1, 0) band transition (281.1 nm) and LIF signal is measured at the the bands of (0, 0) and (1, 1) transition (306~326 nm). Absolute OH radical is obtained by using the laser absorption technique. The quenching effects are considered. Temperature is measured using broadband CARS system. Two dimensional OH radical profile is also obtained. The profiles of OH radical and temperature are found to agree well with those of numerical calculation.

덤프형 가스터빈 연소기에서의 화염 불안정성의 사전 감지 인자

이병준,Lee, Byeong-Jun,Santavicca, D.A. 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.5

The effect of equivalence ratio and velocity on the stability of flame in dump combustor was studied in an atmospheric pressure, laboratory scathe dump combustor operating natural gas. Traditionally, peak-to-peak pressure, fluctuation of the heat release rate and Rayleigh index were used to find and control the combustion instability. Cross correlation coefficients, Ci,j which is defined as the normalized value of the integration of the product of two of the mixer pressure, dump plane pressure and heat release rate, are introduced to see whether the flame is stable or not. Ci,j shows more sensitive to combustion status than Rayleigh index in steadily burning flame. Also, the result indicates that the amplitude of Ci,j between heat release and mixer pressure goes up before the flame at the rich de-stabilizing equivalence ratio near $\psi$=0.85. t means Ci:j at this case has a potential to detect the de-stablizing moment in prior to becoming unstable in dump combustor.

알루미늄 AC4CH 합금주물의 냉각속도 변화에 따른 기계적 물성 예측 및 전산모사 적용

이병준,조인성,Lee, Byoung-Jun,Cho, In-Sung 한국주조공학회 2018 한국주조공학회지 Vol.38 No.2

In a numerical study, equations relating the mechanical properties and cooling rate in a casting process have been applied to an AC4CH cast aluminum alloy. Good agreement was found between the measured and predicted material properties. Step-shaped steel blocks were made to comprise a casting mold with a Y-shaped cavity. Thermometers were inserted into each step of the mold to investigate temperature changes. The microstructure and mechanical properties, such as hardness and tensile stress were measured for each cut of piece. The correlation between the cooling rate and SDAS was found by curved fitting. Moreover, both the solidification time and the temperature were simulated using a commercial package, ZCast. The simulation results for yield strength, tensile strength, elongation, and hardness were compared with experimental results. Using the estimated K and n values, the hardness values of a ship propeller were simulated, and the results were similar to those obtained for actual castings.

공간보간법을 이용한 농촌마을 미세먼지 농도 추정 연구

이병준,윤성수,Lee, Byeong-Jun,Yun, Seong-Su 한국농공학회 2020 韓國農工學會誌 : 전원과 자원 Vol.62 No.2

정보 중심 네트워킹 연구동향

이병준,전홍석,송호영,Lee, B.J.,Jeon, H.S.,Song, H.Y. 한국전자통신연구원 2012 전자통신동향분석 Vol.27 No.2

정보 중심 네트워킹(Information Centric Networking)은 단대단(end-to-end)으로 통신을 수행하는 기존의 인터넷 통신 패러다임을 정보 중심적으로 재편하려는 시도이다. 이 방법론에 따르면, 통신을 원하는 개체는 통신 대상 호스트(host)의 주소를 명시하는 대신, 통신 대상 정보의 식별자(identifier)를 명시하여 통신을 시작한다. 네트워크는 해당 식별자를 통해 어떤 정보를 서비스하여야 하는지 알아낸 뒤 해당 정보를 전송한다. 정보 중심 네트워킹 패러다임을 지지하는 연구자들은 이러한 통신 메커니즘이 기존의 IP 중심적 네트워킹 구조가 갖는 여러 가지 이슈들에 대한 본질적인 해결책이 될 수 있을 것이라 믿는다. 본고에서는 정보 중심 네트워킹에 관한 연구 동향 및 대표적 연구 프로젝트들을 살펴보고, 앞으로 해결되어야 하는 이슈들을 점검한다.

공진화 분석기반 기술 인텔리전스 : 반도체 패키지공정 사례

이병준,신준석,Lee, Byungjoon,Shin, Juneseuk 기술경영경제학회 2020 Journal of Technology Innovation Vol.28 No.4

We suggest a new way of specifying the co-evolution of product and process technologies, and integrating it into one of the well-received technology intelligence tools - a technology radar. Cross impact analysis enables us to identify the core technologies of product-process co-evolution. Combining expert judgment with its results, we can clarify the technological co-evolution trajectory with mainstream as well as emerging core technologies. Reflecting these in the assessment process of a technology radar, we could improve reliance of the technology assessment process and technology portfolio. From the academic perspective, our research provides a point where the co-evolution theory encouners technology intelligence methods. Practically, strategic capability of future-preparedness and strategic management could improve by adopting our method based on our example of co-evolution of semiconductor product and process technologies. 본 연구는 반도체 제품과 설비기술을 대상으로 제품-공정기술 공진화를 교차영향분석(cross impact analysis)을 통해 구체화하고, 공진화 관계를 기술 인텔리전스의 대표적 도구 중 하나인 기술레이더에 통합하는 방법을 제시한다. 교차영향분석을 통해 공정기술 발전과 제품특성 개선이 반복되는 공진화 경로와 축이 되는 세부기술들을 파악했다. 또한 공진화 관계를 기술레이더의 기술가치평가 프로세스에 반영해 가치평가와 연구개발 포트폴리오의 신뢰성을 제고했다. 학술적 측면에서 기술간 공진화를 세부기술 단위에서 구체화했으며, 기술 공진화 이론과 기술 인텔리전스의 접점을 제시했다는 의미가 있다. 실무적 측면에서는 반도체 관통전극-하이브리드 패키지 제품과 주요 후공정 기술간 공진화 및 기술레이더 분석 실례를 제시하고, 이를 통해 기술간 공진화 관계를 기존 기술전략 및 기획도구에 반영해 기업의 미래준비역량과 전략기획의 신뢰성을 제고하는 방법을 구체화했다는 점에서 가치가 있다.

수표교(水標橋)칼럼 - Synchro-Phasor 기술을 이용한 전력망 고도화

이병준,Lee, Byeong-Jun 대한전기협회 2012 전기저널 Vol.- No.421

평면 레이저유도 형광법을 이용한 부상화염의 특성 연구

이병준,정석호,한재원,Lee, Byeong-Jun,Jeong, Seok-Ho,Han, Jae-Won 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.11

Characteristics of the lifted flame which is generated by issuing of the fuel through the miniature nozzle, d = 0.164 mm, are studied using the planar laser induced fluorescence technique. OH radical is excited on the $Q_{1}$(8) line of the $A^{2}$.SIGMA.$^{+.leq.X2}$ .PI.(1, 0) band transition (283.55 nm) and LIF signals are captured at the bands of (0, 0) and (1, 1) transition (306 ~ 326 nm) using the filters and ICCD camera. Hydroxyl radical (OH) profile for nozzle attached flame shows that OH radical populations at the flame sides and flame tip are larger than those at the base. But for the lifted flame (tribrachial flame) case, those are larger at the flame base than at the flame tip and flame sides. The OH radical is more dense near the center line of flame base at the blowing out. This fact proves the Chung and Lee's blowout theory-blowout occurs when the flame is anchored at the flame axis. axis.