A Design Method Reducing the Effect of Zeros of a Cascaded Three-Parameters Controller : The Characteristic Ratio Assignment Approach

金麗花,李灌浩(Kwan-Ho Lee),金永喆(Young-Chol Kim),Li-Hua Jin 대한전기학회 2006 전기학회논문지 D Vol.55 No.1

This paper presents a new approach to the problem of designing a cascaded three-parameters controller for a given linear time invariant (LTI) plant in unity feedback system. We consider a proportional-integral-derivative (PID) and a first-order controller with the specified overshoot and settling time. This problem is difficult to solve because there may be no analytical solution due to the use of low-order controller. Furthermore, the zeros of controller just appear in the zeros of feedback system. The key idea of our method is to impose a constraint on the controller parameters so that the zeros of resulting controller are distant from the dominant pole of closed-loop system to the left as far as the given interval. Two methods realizing the idea are suggested. We have employed the characteristic ratio assignment (CRA) in order to deal with the time response specifications. It is noted that the proposed methods are accomplished only in parameter space. Several illustrative examples are given.

A Design Method Reducing the Effect of Zeros of a Cascaded Three-Parameters Controller : The Characteristic Ratio Assignment Approach

김려화(Jin Li Hua),이관호(Kwan Ho Lee),김영철(Young Chol Kim) 대한전기학회 2005 대한전기학회 학술대회 논문집 Vol.2005 No.10

조선후기 역관 李容肅의 행적과 작품 개관

金麗華(Jin, li-hua) 한국고전번역원 2017 民族文化 Vol.49 No.-

본고는 조선후기 역관 李容肅(1818-1890 이후)의 주요 행적과 교유 상황을 연대별로 정리하고 그의 문학작품에 대해 개관하였다. 이용숙은 역관 집안에서 태어났고 초년기 시절 李尙迪(1804-1865) 문하에서 수학하였다. 이 시기에 남긴 한시작품에는 그의 일상이 담겨 있으며 긍정적인 삶의 태도가 구현되어 있다. 이용숙은 1858년에 『全州李氏族譜』를 편찬하기도 하였다. 1860연대 이용숙은 朝 · 淸 문인들의 교유의 장에서 적극적으로 ‘중개인’ 역할을 수행하였으며 자신도 많은 조선 사대부와 역관, 그리고 청나라 문사들과 교분을 맺었다. 그는 조선 문인과 그들의 문집을 청나라 문인들에게 소개하고 또한 적극적으로 그들 사이에서 서찰을 전달하였다. 그리고 수차례 연행 길에서 연행사 사대부들과 시문으로 교류하였고 청나라 문인들과도 시를 주고받았으며 우정을 쌓았다. 이 시기에 남긴 한시작품들은 주로 酬唱詩와 交遊詩였다. 1870연대는 이용숙이 역관에서 외교관으로 발돋움했던 시기다. 그는 장기간의 외교활동을 통해 경력을 축적하고 식견을 넓히면서 점차 조선의 외교 사무에서 활약상을 보였다. 이용숙은 연경에서 베트남 사신과 수창을 하였지만 아쉽게도 이번 만남에서 지은 그의 한시작품은 전하지 않았다. 1870연대 후반부터 1880년대 초까지 이용숙은 빈번히 청나라와 일본을 왕래하며 근대적 외교관의 역할을 수행하였다. 이 시기에 조선, 청나라, 일본 삼국은 복잡한 외교문제와 국제적인 사건들로 얽혀있었는데 이용숙은 조선 외교 사무를 담당했던 관원 중의 한 사람으로서 그 생생한 역사현장에서 자신의 역할을 충실히 수행하였다. Lee Yongsuk(1818- after 1890) was a translator in the late Chosŏn Dynasty. And this paper is a study on his main deeds, his companies and his literary works. Lee Yongsuk was born in a translator family. As a youngster, he learned from Lee Shangjeok(李尙迪, 1804-1865) who was a well-known translator in the Chosŏn. In this period, his poems reflected his daily life and showed a positive attitude towards life. In 1858, Lee Yongsuk compiled Genealogy of Chŏnju Lee Family(『全州李氏族譜』). In 1860s he played an intermediary role between the Qing literati and the Chosŏn literati. Lee Yongsuk also made friends with scholar-officials of the Chosŏn and Qing scholars. He was very active in the introduction of the Chosŏn literatis’ work to Qing, and he helped them to convey the letters to each other. Lee Yongsuk went to Beijing many times in this period. He wrote and replied poems not only to the scholar-officials of the Chosŏn on the way, but also to the Qing literati. In 1860s, he mainly wrote poems such as suchang poetry(酬唱詩) and association poetry(交遊詩) as the main. Lee Yongsuk developed from a translator to a diplomat in 1870s. He accumulated a wealth of experience and opened his eyes through long diplomatic activities, and then he gradually played a role in Foreign Affairs of the Chosŏn. He met the Vietnamese envoys in Beijing. They wrote poetry to each other, but un fortunately, I haven’t found Lee Yongsuk’s works about this meeting in this paper. From the latter half of the 1870s to early 1880s, he frequently went between the Chosŏn and Qing, he had also been to Japan two times. During this period, the relationship with Chosŏn, Qing and Japan was very complex because of diplomatic issues and international events. As one of the officials in charge of Foreign Affairs, Lee Yongsuk gave full play to his part in the historical stage.

일부 농촌여성들의 골다공증 유병률과 그 관련요인

김려화 ( Li Hua Jin ),김기순 ( Ki Soon Kim ),강명근 ( Myung Guen Kang ),류소연 ( So Yeon Ryu ),이철갑 ( Chul Gab Lee ),박종구 ( Jong Ku Park ),고상백 ( Sang Baek Koh ),임애용 ( Ae Yong Eom ) 한국모자보건학회 2007 한국모자보건학회지 Vol.11 No.1

Objectives: This study was conducted to find the prevalence of osteoporosis and its related factors among rural women as basic data to develope educational materials to prevent and for longitudinal observatory study. Methods: Toward 596 40~70 year old women living in Bongwhang Township, Naju City, Chollanamdo, examinations including quantitative ultrasound (QUS) bone densitometry, questionnaire survey for life-style, anthropologic measurements and blood tests were performed for 45 days from January 9th, 2006. Osteoporosis was defined as T score -2.5 or below and T score -1.0 or above was nominated as normal group. Odds ratios (OR) with 95% confidence interval of osteoporosis group versus normal group were calculated by potential risk factors. Multiple logistic regression analysis was performed to find significant and dependent related factors. Results: The prevalence of osteoporosis among the subjects was 19.0%. The multiple logistic regression analysis showed that the OR of osteoporosis among elementary educated group compared to non-educated group was 0.34 (95%CI: 0.16~0.73). The OR of osteoporosis among subjects whose body mass index (BMI) were 25 kg/m² or more against lower than 25 kg/m2 was 0.32 (95%CI: 0.15~0.70). The OR of osteoporosis among subjects who had started menarche later than 20 years old as compared to subjects who had started menarche before 15 years old was 4.73 (95%CI: 1.27~17.7). Conclusions: Late menarche age was the risk factor toward osteoporosis, while high education and high BMI were the protective factors against osteoporosis in study population.

Analysis of the proteomic response in Agrobacterium sp. ATCC31750 with the change of fermentation time

Li-Hua Jin(김려화),Jung-Heon Lee(이중헌) 한국생물공학회 2004 한국생물공학회 학술대회 Vol.2004 No.10

선택적 에탄올 흡착을 활용한 에탄올 농축공정개발

김려화(Li-Hua Jin),이중헌(Jung-Heon Lee) 한국생물공학회 2010 KSBB Journal Vol.25 No.5

본 연구에서는 자석으로 분리가 가능한 polyaniline nanofiber (PAMP)를 개발하여 선택적인 에탄올 흡착 및 탈착공정을 활용하여 에탄올을 농축하였다. 개발된 PAMP는 용액 중에 있는 에탄올을 80%이상 흡착하였다. 자석을 활용하여 PAMP에 흡착된 에탄올의 회수가 가능하였으며, 물리적인 힘을 통하여 에탄올 탈착이 가능하여 에탄올의 회수가 용이하였다. 본 연구에 개발된 PAMP는 지속적인 재활용이 가능하였다. 본 연구에서 PAMP를 10회 반복 사용하였을 때 PAMP의 에탄올 흡착율은 최초 사용한 경우의 92%를 유지하여 PAMP를 지속적으로 활용할 수 가능성을 확인하였다. 본 연구에서 개발된 PAMP를 사용하여 46 g/L 의 저농도 에탄올을 197.6 g/L의 고농도 에탄올로 농축이 가능하였다. In this study, we developed simple process for ethanol concentration. We developed magnetically separable polyanilline nanofiber (PAMP) for selective ethanol adsorption. PAMP can adsorbed 80% of ethanol in the solution. After adsorption, the ethanol was recovered with simple magnetic separation and centrifugation process. After 10 times recycle of PAMP, the ethanol adsorption maintained 92% of its initial adsorption capacity. Using ethanol concentration process, the ethanol concentration increased up to 197.6 g/L from 46 g/L which was 4.3 folds increase.

일제 강점기 여성 간호인의 독립운동에 관한 역사연구

김려화(Li Hua Jin),김미영(Mi Young Kim) 한국간호행정학회 2014 간호행정학회지 Vol.20 No.4

The purpose of this study was to elucidate the role of Korean women nurses in the independence movement and to examine their activities during the Japanese occupation from 1910 to 1945. Methods: Nurses studied were women nurses referred to as Ganhowon, Ganhobu, Gyeonseupganhobu, Sanpa, and Josanbu at that time. Five participants such as descendents or relatives of nurses who participated in independence movements, were selected for interview to provide oral historical materials. An historical research approach was used and all of the data were analyzed according to period, region, and pattern of the independence movement. Results: Throughout the historical literature and oral historical materials, it was found that from 1914 to 1945, thirty-eight women nurses actively participated in various types of independence activities such as mass hurrah demonstrations, raise the spirit of war, red cross activities, enlightenment movement and armed struggle to encourage the public to stand up against Japanese imperialism locally and abroad. Conclusion: The findings indicate that women nurses, as enlightened women, endeavored to solve social issues with their autonomous volition, and these action can serve as meaningful evidence for enhancing the social status of nurses.

Effect of Uracil Addition on Proteomic Profiles and 1,3-Beta-Glucan Production in Agrobacterium sp.

Li Hua Jin(김려화),Jung Heon Lee(이중헌) 한국생물공학회 2005 한국생물공학회 학술대회 Vol.2005 No.10

Change of Protein Contents in Agrobacterium sp. ATCC 31750 with the Change of Nitrogen Concentration

Li Hua Jin(김려화),Yang Ho Park(박양호),Jung Heon Lee(이중헌) 한국생물공학회 2004 한국생물공학회 학술대회 Vol.2004 No.4

간호사의 심폐소생술의 의미

박진아(Park Jin Ah),박금주(Park Kuem Ju),김려화(Jin Li Hua) 질적연구학회 2010 질적연구 Vol.11 No.2

Purpose: The purpose of this study was to explore the meaning of cardiopulmonary resuscitation experienced by nurses. Methods: The phenomenological method developed by Giorgi was used for this study. The participants were 8 nurses who had experienced cardiopulmonary resuscitation. The data were collected between July, 2010 and September, 2010 by face-to-face interviews. The interview was recorded and then transcribed. Results: The constituents associated with the meaning of the Nurses' experiences on cardiopulmonary resuscitation were as followings: "nurses still felt embarrassed in the situation of cardiopulmonary resuscitation," "nurses found life worth and sense of satisfaction after cardiopulmonary resuscitation," "bad results of cardiopulmonary resuscitation caused nurses' emotional distress," "nurses felt sorry for patient who had no chance of being resuscitated," "nurses helped patient who had been determined to do-not-resuscitate with all their hearts." Conclusion: The results of this study may contribute to a deeper understanding of the meaning of the cardiopulmonary resuscitation experienced by nurses. Our results highlight the need to perform more studies on comfortable experiences of patients who were recipients of do-not-resuscitate and to develop support systems for nurses working at general wards.