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자바리 (Epinephelus moara)와 대왕자바리 (E. moara ♀× E. lanceolatus ♂)에 대한 MS-222의 마취효과
박종연 ( Jong Yeon Park ),김강래 ( Kang-rae Kim ),방인철 ( In-chul Bang ) 한국어류학회 2019 韓國魚類學會誌 Vol.31 No.4
자바리와 대왕자바리 2종을 대상으로 MS-222 농도 및 수온에 따른 마취효과 실험을 수행하였다. 농도는 100, 150, 200 그리고 250 ppm을, 수온은 18, 22, 26 그리고 30℃에서 마취 및 회복시간을 조사하였다. MS-222 농도와 수온이 높아질수록 마취시간이 짧아지는 경향을 보였으며, 회복시간은 농도와는 비례하지만 수온과는 반비례하는 경향을 보였다. 회복시간은 22℃ 이하에서는 큰 차이가 없었다. 자바리의 최적 마취조건은 회복시간이 가장 짧은 30℃와 100 ppm, 대왕자바리의 경우 30℃ 150 ppm이 회복시간이 100 ppm과 유의적으로 차이가 없으면서 마취시간은 유의하게 짧아 가장 적합했다. 이원배치분산분석 결과 자바리와 대왕자바리의 종 간 유의한 차이가 있었으나, 종과 농도 그리고 종, 농도, 수온에 대한 상호작용 효과는 없었다. The anaesthetic effect of tricaine methanesulfonate (MS-222) concentrations and water temperatures for longtooth grouper (Epinephelus moara) and hybrid grouper (E. moara ♀× E. lanceolatus ♂) were investigated. Anesthetic induction and recovery time were measured at 18, 22, 26 and 30°C of Cwater temperature and 100, 150, 200 and 250 ppm of anesthetic concentrations. Anesthetic induction time tended to decrease with increasing concentration and water temperature. Recovery time was proportional to concentration, but inversely proportional to water temperature. However, there was no significant differences in recovery time at 22°C or lower. The optimal anesthesia condition was 30°C and 100 ppm, which was the shortest recovery time for longtooth grouper, and 150 ppm at 30°C in the case of hybrid grouper because anesthetic time is significantly different with 100 ppm in spite of no significant differences with 100 ppm for recovery time. As a results of two-way ANOVA test, there was a significant difference between the species of longtooth and hybrid grouper. On the other hand, there was no interaction effect between concentration and species. Also, there was no interaction effect among species, concentration, and water temperature.
제한된 파형을 이용한 향상된 RSA-CRT 부채널 분석
박종연 ( Jong-yeon Park ),한동국 ( Dong-guk Han ),이옥연 ( Okyeon Yi ),최두호 ( Dooho Choi ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1
RSA-CRT 알고리즘은 RSA 의 지수승 연산의 효율성을 향상시키기 위해 널리 사용되고 있으며, CRT 를 적용한 알고리즘은 다양한 방법의 부채널 분석(Side Channel Analysis)으로부터 약점이 노출되어 왔다. 그 중 Boer 등에 의해 발표된 MRED 분석 방법은, 등 간격의 데이터(Equidistant Data)를 이용하여 CRT 의 모듈러 리덕션 연산(Modular Reduction)결과로부터의 약점을 활용하여 일반적인 DPA 분석 법을 적용시킨 방법이다. 우리는 리덕션 결과의 데이터에 의존한 분석에서 벗어나, 리덕션 알고리즘 중간 연산 과정을 공격하는 새로운 공격 방법을 개발하였으며, 새로운 공격은 오직 “256×n개”의 파형만으로 키 공간을 상당히 줄일 수 있기 때문에, 제한된 평문 수에서 이전에 알려져 있던 일반적인 MRED 분석 방법보다 향상된 분석 성능을 제공한다. 본 논문은 리더션 연산과정을 이용한 새로운 전력 분석 방법을 실제 MCU Chip 을 이용한 분석 결과를 제안한다.
릴레이 구동회로 및 수동필터를 이용한 단상 전원의 부하 적응형 고조파 전류 제거 기법
朴鍾演(Jong-Yeon Park),李厚燦(Hu-Chan Lee),李奉振(Bong-Jin Lee),崔源豪(Won-Ho Choi) 대한전기학회 2006 전기학회논문지 B Vol.55 No.6
Because of the high cost for the active power filter, passive filters have been widly used to eliminate harmonic currents of nonlinear load and can also improve the power factor. They are not often optimal filters because the passive filters are designed under the fixed load conditions. In this paper we proposed the method which only the necessary harmonic filters are operated by detecting the various harmonic current components. We presents the new control method of passive filter selection type with the relay control circuit which is consist of analog GIC, comparater, flip-flop and etc. By the experimental results using the proposed system for the rectifier load, we concluded that the researched method is cost effective and the performance is better than the passive filter.
논문(論文) : 조선(朝鮮) 초기(初期) 중국어(中國語) 통역(通譯) 발전(發展) 배경(背景)에 관한 연구(硏究) -≪조선왕조실록(朝鮮王朝實錄)≫의 기록(記錄)을 중심(中心)으로-
박종연 ( Jong Yeon Park ) 영남중국어문학회 2015 중국어문학 Vol.0 No.70
This has been studied on the meaning of Chinese translation history in the early era of the Joseon Dynasty in the synchronic perspectives of the Annals of the Joseon Dynasty. Translation of the Chinese Language was well developed by the situations of politics, economy and culture in the early Joseon Dynasty. Therefore, three (3) main aspects has been considered in the thesis. In politics, the Joseon Dynasty was one of the very important to the Ming Dynasty. Since the Joseon Dynasty’s destiny was dependent upon the relationship with the Ming Dynasty which was a strong nation, it wanted to achieve political purpose through the translation. In addition, the Joseon Dynasty made profits throughout tributary and unofficial trade with the Ming Dynasty in economy. Translators in the official delegates from the Joseon Dynasty played an important roles in making revenues with the Ming Dynasty. And culturally, they contributed to importing the developed medicine and technology and books from the Ming Dynasty. In order to meet the needs of the times in translation, Training Center for Translation was established, and it also resulted in educating and producing the translators of the Chinese Language and the development of translation in the history of translation.
박종연,최규현,Park, Jong-Yeon,Choe, Gyu-Hyeon 대한전자공학회 2000 電子工學會論文誌-TC (Telecommunications) Vol.37 No.4
통신을 위한 채널로써 전력선을 활용하기 위해서, 전력선상에서 존재하는 잡음을 측정하여 잡음 데이터를 획득하고, 망구조에 따른 단위길이(100m당)에 따른 신호 감쇄량을 측정했다. 본 논문에서 구분한 3종류의 전력선 구조에 따른 신호 감쇄와 잡음의 최대, 최소값을 이용해서 채널 용량식에 대입한 후 통신 채널로써 전력선이 가지는 채널용량을 계산하였다. 건물내 전력선이 가지는 채널용량은 전력선에 있어서 송,수신기 사이의 거리와 전력선 망구조에 영향을 크게 받는 것으로 나타났다. To use the power line as the communication channel, we have analyzed channel characteristics with the noise data and signal attenuation levels measured on power lines per loom. In this paper, channel capacities are calculated in the best or the worst case noise states and signal attenuations on power lines for three kinds of network-topologies. Analyzed the channel capacity by the best and worst conditions, we concluded that the serious factors influenceing on the channel capacity are the length from a transmitter to a receiver and the network topology.
RSA에 대한 향상된 등간격 선택 평문 전력 분석 방법
박종연(Jong-Yeon Park),최지선(Ji-Sun Choi),한동국(Dong-Guk Han),이옥연(Okyeon Yi) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6
Several Side Channel Analysis (SCA) techniques on RSA-CRT have been published. Especially, Boer at al. proposed a novel power analysis attack against modular reduction step at RSA-CRT by using equidistant chosen message as input, called as ECMPA. Based on this analysis, an attacker can get the secret primes in RSA algorithm. In this paper, we show that ECMPA has different analysis pattern compared to the general Differential Power Analysis and Correlation Power analysis. Therefore, to make ECMPA be more practical analysis we propose an enhanced ECMPA which includes how to select the result of decision function and how the ghost keys work.
Zn - 22wt%Al 합금의 진동감쇠특성에 미치는 냉간가공과 온도의 영향
김종연(Jong Yeon Kim),박희석(Hee Seok Park),나형용(Hyun Yong Ra) 대한금속재료학회(구 대한금속학회) 1996 대한금속·재료학회지 Vol.34 No.9
This study was conducted on the specific damping capacity(SDC) of rolled Zn-22Al alloy(Superplastic Zinc, SPZ). SDC is found to increase with increasing reduction ratio, because of the microstructure change from network to particle type. SDC is very sensitive to the change of frequency, so that the variation of frequency with reduction ratio was investigated. Frequency is almost constant with reduction ratio. But the frequency is decreased when the specimen is heat treated. SDC of both as-rolled and heat treated sheets are increased largely with increasing temperature. That is, SDC is about 11~14% at room temperature, but 50% at 130℃. This reason is considered as follows. Relaxation time τ subjects to thermal activation process and SDC becomes a maximum(has a peak) when ωτ is equals to 1 in SDC =△0ωτ/ (l +ω2τ2).