Pb(Mn_1/3Nb_2/3)O₃-PbZrO₃-PbTiO₃ 세라믹스의 압전특성에 미치는 Al₂O₃의 영향

김미정,김재창,김영민,어순철,김일호,Kim Mi-Jung,Kim Jae-Chang,Kim Young-Min,Ur Soon-Chul,Kim Il-Ho 한국재료학회 2005 한국재료학회지 Vol.15 No.7

Piezoelectric properties of $Pb(Mn_{1/3}Nb_{2/3})O_3-PbZrO_3-PbTiO_3$ ceramics were investigated with $Al_2O_3$ content $(0.0-1.0 wt\%)$. The constituent phases, microstructure, electromechanical coupling factor, dielectric constant, piezoelectric charge and voltage constants were analyzed. Diffraction peaks for (002) and (200) planes were identified by X-ray diffractometer for all the specimens doped with $Al_2O_3$, indicating the MPB (morphotropic phase boundary) composition of tetragonal structures. The highest sintered density of $7.8 g/cm^3$ was obtained for $0.2wt\%\;Al_2O_3-doped$ specimen. Grain size increased by doping $Al_2O_3$ up to $0.3 wt\%$, and it decreased by more doping. Electromechanical coupling factor, dielectric constant, piezoelectric charge and voltage constants increased by doping $Al_2O_3$ up to $0.2wt\%$, and it decreased by more doping. This might result from the formation of oxygen vacancies due to defects in $O^{2-}$ ion sites and the substitution of $Al^{3+}$ ions.

재현의 곤경, 설득의 서사 넘기 ― 5월 광주 서사의 현재와 과제 ―

김미정 ( Kim¸ Mi-jung ) 현대문학이론학회 2020 現代文學理論硏究 Vol.0 No.83

오늘날 재현을 질문하는 과정 자체가 아이러니하게도, 백래쉬와 경합하는 장이 되기도 한다. 재현에 대한 문제의식이 궁극적으로 어떤 언설과 연결될지 가늠하는 것도 중요해졌다. 본 논문은, 오늘날 재현의 윤리에 대한 질문이, 대중적 백래쉬의 정동과 교착하는 장면들에 대한 문제의식에서 출발했다. 최근 빈번히 발견되는 설득의 서사구조에서도 이런 우려를 생각해볼 수 있다. 이러한 서사구조는 백래쉬와 부정의 언설 앞에서 스스로를 증명해야 하는 강박과 관련될 것이다. 그런데 그 설득의 과정 자체가 재현에 대한 오인을 발생시키곤 한다.. 오늘날 서사 속 5월 광주 재현이 처한 곤경도 이러한 재현 일반의 문제와 연동한다. 1990년대 이후 제도화, 공식화한 언어와 상상력을 공회전하면서 5월 광주 재현은 부정, 백래쉬 앞에서 무력해지곤 한다. 이것은 같은 언어를 공유, 활용하고 있는 조건과 장의 문제이기도 하다. 이 글은, 영화 <김군>(2018), 최윤 소설 「저기 소리 없이 한 점 꽃잎이 지고」(1988)를 재독해하면서 이러한 5월 광주 서사의 현재와 과제를 가늠하고자 했다. This study started with the problem of the scenes where the question about the ethics of representation today intersects with the affect of popular backlash. Ironically, the process of questioning representation itself becomes a field to compete with opposing forces. Therefore, it is also necessary to carefully assess what kind of discourse will ultimately lead to the problem about representation today. This concern can also be considered in the narrative structure of persuasion, which is frequently discovered recently. This narrative structure will be related to the intention to prove oneself in front of backlash and denial. However, the process of persuasion itself causes misconceptions about representation. In today's narrative, the predicament of the May Gwangju uprising representation is also linked to this problem. Since the 1990s, the institutionalized and formalized language and imagination have been lethargy. This is also a matter of foundation and field sharing the same language. This article attempted to assess the present and tasks of the May Gwangju uprising narrative by reading the movie < Kim-Gun > (2018) and Choi Yoon's novel(1988).

파종시기별 유효적산온도(GDD)가 옥수수의 생육 및 수량변화에 미치는 영향

김미정,정건호,김성국,이재은,전원태,심강보,김민태,우관식,권영업,허성기,Kim, Mi Jung,Jung, Gun Ho,Kim, Sung Kook,Lee, Jae Eun,Jeon, Weon Tai,Shim, Kang Bo,Kim, Min Tai,Woo, Koan Sik,Kwon, Yong Up,Heu, Sunggi 한국작물학회 2017 한국작물학회지 Vol.62 No.3

A total of 15 different corn hybrids, Kwangpyeongok, Gangdaok, Yanganok, Singwangok, Jangdaok, Cheonganok, Cheongdaok, Andaok, Dapyeongok, Pyeongkangok, Pyeonganok, Daanok, Sunwon 184, Gangilok, and P3394 was used to investigate the growth and yield depending on the sowing date. The sowing dates were April 5, June 25, and July 5 and each experiments was performed in triplicste. The growth of Gangdaok was the highest. However, although the growth of Kwangpyeongok, was lower thanthar of Gangdaok, its stem height to ear height ratio was lower than that of Gangdaok, thus, Kwangpyeongok may be more suitable for stable cultivation. Both growth and yield of Daanok were low, regardless of planting date, but yield and ear shape of Pyeongkangok and Dapyeongok were for fresh corn. Growth and yield of the 15 different corn hybrids varied depending on the planting date, However, the growth degree days (GDD) was the most important factor governing the maturity of corn. More than $1500^{\circ}C$ of GDD was sufficient to harvest mature corn hybrids in the central region of Korea. Besides yield and growth, other characteristics, such as sweetness and taste of the hybrids, should be investigated further the selection of the best corn hybrid.

유방 부분 절제술 후 방사선 치료 시 TOMO Direct를 이용한 접선 조사의 선량적 유용성에 관한 고찰

김미정,김주호,김훈겸,조강철,전병철,조정희,Kim, Mi-Jung,Kim, Joo-Ho,Kim, Hun-Kyum,Cho, Kang-Chul,Chun, Byeong-Chul,Cho, Jeong-Hee 대한방사선치료학회 2011 대한방사선치료학회지 Vol.23 No.1

Purpose: Investigation of the clinical use of tangential fields technique using TOMO direct in comparison to conventional LINAC based radiation therapy after breast partial mastectomy. Materials and Methods: Treatment plans were created for 3 left-sided breast cancer patients who had radiation therapy after breast partial mastectomy by using wedged tangential fields technique, field in field technique (FIF), TOMO Direct, TOMO Direct intensity modulated radiation therapy (IMRT) under the normalized prescription condition ($D_{90%}$: 50.4 Gy/28 fx within CTV). Dose volume histogram (DVH) and isodose curve were used to evaluate the dose to the clinical target volume (CTV), organ at risk (OAR). We compared and analyzed dosimetric parameters of CTV and OAR. Dosimetric parameters of CTV are $D_{99}$, $D_{95}$, Dose homogeneity index (DHI: $D_{10}/D_{90}$) and $V_{105}$, $V_{110}$. And dosimetric parameters of OAR are $V_{10}$, $V_{20}$, $V_{30}$, $V_{40}$ of the heart and $V_{10}$, $V_{20}$, $V_{30}$ of left lung. Results: Dosimetric results of CTV, the average value of $D_{99}$, $D_{95}$ were $47.7{\pm}1.1Gy$, $49.4{\pm}0.1Gy$ from wedged tangential fields technique (W) and FIF (F) were $47.1{\pm}0.6Gy$, $49.2{\pm}0.4Gy$. And it was $49.2{\pm}0.4$ vs. $48.6{\pm}0.8Gy$, $49.9{\pm}0.4$ vs. $49.5{\pm}0.3Gy$ Gy for the TOMO Direct (D) and TOMO Direct IMRT (I). The average value of dose homogeneity index was W: $1.1{\pm}0.02$, F: $1.07{\pm}0.02$, D: $1.03{\pm}0.001$, I: $1.05{\pm}0.02$. When we compared the average value of $V_{105}$, $V_{110}$ using each technique, it was the highest as $34.6{\pm}9.3%$, $7.5{\pm}7.9%$ for wedged tangential fields technique and the value dropped for FIF as $16.5{\pm}14.8%$, $2.1{\pm}3.5%$, TOMO direct IMRT as $7.5{\pm}8.3%$, $0.1{\pm}0.1%$ and the TOMO direct showed the lowest values for both as 0%. Dosimetric results of OAR was no significant difference among each technique. Conclusion: TOMO direct provides improved target dose homogeneity over wedged tangential field technique. It is no increase the amount of normal tissue volumes receiving low doses, as oppose to IMRT or Helical TOMO IMRT. Also, it simply performs treatment plan procedure than FIF. TOMO Direct is a clinical useful technique for breast cancer patients after partial mastectomy.

AHP를 이용한 사서교사의 북큐레이션 서비스 제공에 대한 우선순위 분석

김미정,이병기,임정훈,Kim, Mi-Jung,Lee, Byeong-Kee,Lim, Jeong-Hoon 한국도서관정보학회 2020 한국도서관정보학회지 Vol.51 No.3

This study aims to identify priorities in book curation service that the teacher librarians perceive important through the AHP (Analytic Hierarchy Progress) method by comparing the jobs of teacher librarians with those of curators and selecting the contents and areas of book curation service provided by school libraries. For the purpose, this study categorized the book curation service areas by class and analyzed the priorities in the book curation service areas in the school libraries by applying the AHP method on the teacher librarians who are the personnel in school libraries. As a result, the priorities in the upper-tier class were turned out to be information services, improvement of expertise, information resources, management, and promotion & marketing in that order. The priorities in the lower-tier evaluation areas were shown in the order of survey & research, Q&A, self-development, exhibition, budget allocation, connecting with experts, trend analysis, reading education, human resources, planning, collaboration class, marketing services, book status, online promotion, offline promotion, and facilities & environment. Based on the results, this study suggested the following plans to provide effective book curation services in school libraries: grasping characteristics of school library users, setting classification criteria for book curation, and finding reader participation-oriented book curation service. 본 연구는 큐레이터와 사서교사의 직무를 상호 비교·분석하여 학교도서관에서 제공하는 북큐레이션 서비스의 내용과 영역을 설정한 후, AHP(Analytic Hierarchy Progress) 방법을 통해 사서교사가 중요하게 인식하는 북큐레이션 서비스의 우선순위를 밝히는 데 목적이 있다. 이를 위해 북큐레이션 서비스 영역을 계층별로 나누고, 학교도서관 전담인력인 사서교사들을 대상으로 AHP 방법을 적용하여 학교도서관 북큐레이션 서비스 영역의 우선순위를 분석하였다. 분석결과 상위계층의 우선순위는 정보서비스, 전문성 신장, 정보 자원, 경영, 홍보 및 마케팅 순으로 나타났고, 하위계층의 우선순위는 조사 및 연구, 질의응답, 자기계발, 전시, 예산편성, 전문가 연계, 트렌드 분석, 독서교육, 인적자원, 기획, 협력수업, 마케팅 서비스, 소장, 온라인 홍보, 오프라인 홍보, 시설 및 환경 순으로 나타났다. 이를 토대로 학교도서관 북큐레이션 서비스를 효과적으로 제공하기 위한 방안으로 학교도서관 이용자의 특성 파악, 북큐레이션을 위한 분류기준의 설정, 독자 참여형 북큐레이션 서비스 모색의 필요성을 제시하였다.

소아 아토피 피부염에 대한 문헌적 고찰(최근 중의잡지를 중심으로)

김미정,이승연,Kim Mi-Jung,Lee Seung-Yeon 대한한방소아과학회 2000 대한한방소아과학회지 Vol.14 No.2

A literature study was progressed for oriental medical treatment for atopic dermatitis. Atopic dermatitis is a chronic or chronically relapsing, pruritic dermatitis. In oriental medical treatment is classified into the treatment of inside(herb tea), treatment of outside(medicine for external application), treatment of inside & outside. The method of inside treatment is improving in health for the spleen and clearing wetness(健脾利濕), extinguishing wind and refreshing fever(消風淸熱), nourishing blood and making dryness gloss(養血潤燥). The method of outside treatment is refreshing fever and removing wetness(淸熱燥濕), counteracting the poison and getting rid of itch(解毒止痒), removing the boil and forming proud flesh(消腫生肌). The method of inside & outside is improving in health for the spleen and clearing wetness(健脾利濕), refreshing fever and getting rid of itch(淸熱止痒). refreshing blood and extinguishing wind(凉血祛風).

다범주 자료의 다항로짓 모형과 로지스틱 회귀모형 비교;장애연금 특성분석 중심으로

김미정,Kim, Mi-Jung 한국통계학회 2008 응용통계연구 Vol.21 No.4

This article studies on disability pensioners' characteristic with multinomial logit and logistic regression model. Seven factors are examined on whether each factor is reflected in degree of disability in the disability pension. By incorporating multinomial logit and logistic regression model, effectiveness and characteristic of the seven factors are investigated on the degree of disability. Result shows all the seven factors are significant on the degree of disability, while among the seven, five factors, age, sex, type of coverage, type of category, insured duration show a trend in degree of disability and the other two, cause of disability and class of standard monthly income are not effective on trend in degree of disability. Results from analyses might be useful for disability pension management. 순위형 다범주 자료에 있어서 범주값의 증감에 대한 설명변수의 특성분석을 위하여 다항로짓모형을 적합하여 분석하고 로지스틱 회귀모형을 적합하여 분석한 결과와 비교하였다. 이를 통하여 장애연금 수급자자료의 재정추계를 위해 필요한 일곱 가지 요인인 성별, 수급나이, 가입기간, 가입종별, 소득활동여부, 소득수준, 장애원인이 장애등급에 미치는 영향을 파악하였다. 일곱 요인 모두 장애응급에 대한 연관성이 있음을 확인하였고 이 가운데 다섯 요인은 장애등급의 증감에 있어서도 일정한 추세를 보였으나, 장애원인과 소득수준은 장애등급의 증감에는 일정한 추세를 보이지 않음을 확인하였다. 본 연구의 결과는 장애연금 관리방안을 모색하는데 있어서 장애등급에 따른 설명 요인의 특성을 반영하는데 필요한 가이드라인을 제공할 수 있을 것으로 기대한다. 장애등급 분류에 있어서 다중분류의 정분류율은 각각 42.56%와 42.43%로 로지스틱 회귀모형의 경우 다중로짓 모형의 경우보다 다소 높았지만 거의 비슷한 정확도를 보였다.

부분적으로 스트론튬이온으로 교환되고 탈수된, 제올라이트 X의 결정구조

김미정,김양,칼세프,Kim Mi Jung,Kim Yang,Seff Karl Korea Crystallographic Association 1997 韓國結晶學會誌 Vol.8 No.1

제올라이트 X에 $Sr^{2+}$와 $K^+$ 이온이 교환된 $Sr_{31}K_{30}-X$와 $Sr^{2+}$와 $Tl^+$ 이온이 교환된 $Sr_{8.5}Tl_{75}$의 결정구조를 공간군 Fd3로 $21(1)^{\circ}C$에서 단결정 X선 결정학적 방법으로 해석하였다. 각각의 결정은 $Sr(ClO_4)_2$와 (K 혹은 Tl)$NO_3$의 몰 비가 1 : 5인 용액을 사용해서 흐름 법으로 5일 동안 이온 교환시키고 $360^{\circ}C$에서 진공탈수 시켜 두 결정을 얻었다. 이들 결정은 회절강도가 $I>2{\sigma}(I)$인 293개와 351개의 회절반사를 사용하여 최종오차인자가 $R_1=0.072,\;R_w=0.057$과 $R_l= 0.058,\;R_w=0.044$까지 각각 정밀화하였다. $Sr_{31}K_{30}-X$결정에서 $Sr^{2+}$ 이온과 $K^+$ 이온은 모두 다섯 개의 서로 다른 결정학적 자리에 존재하였다. 단위세포당 16개의 $Sr^{2+}$ 이온은 결정학적 자리 I인 D6R의 중심에 각각 위치하고 D6R 모두를 채우고 있다. 나머지 15개의 $Sr^{2+}$ 이온과 17개의 $K^+$ 이온은 큰 동공 속에 있는 결정학적 자리II에 위치하고 세 개의 산소이온이 이루는 평면에서 각각 $0.45{\AA},\;1.06{\AA}$ 큰 동공속으로 이동하여 위치하고 골조산소와 결합거리는 각각 $2.45(1){\AA},\;2.64(1){\AA}$이다. 13개의 $K^+$ 이온은 두 개의 다른 결정학적자리 III'에 위치하며 인접한 산소와의 결합거리는 각각 $2.88(7){\AA}$와 $3.11(10){\AA}$이다. $Sr_{8.5}Tl_{75}-X$에서는 $Sr^{2+}$이온과 $Tl^+$ 이온이 역시 다섯 개의 서로 다른 결정학적 자리에 위치한다. 약 8.5개의 $Sr^{2+}$ 이온은 결정학적 자리 I에 있으며, 15개의 $Tl^+$ 이온은 D6R의 3회 전축상의 소다라이트내에 있는 결정학적 자리 I'에 있다. 이 $Tl^+$ 이온은 골조산소와의 결합거리가 $2.70(2){\AA}$이며 세 개의 산소가 이루는 평면에서 $1.68{\AA}$ 소다라이트내로 이동하여 위치한다. 32개의 $Tl^{+}$ 이온은 결정학적 자리 II에 존재하고 있으며 산소와의 결합거리를 $2.70(1){\AA}$을 유지하면서 큰 동공속으로 $1.48{\AA}$ 이동하여 위치한다. 약 18개의 $Tl^+$ 이온은 결정학적 자리III에, 또 다른 10개의 $Tl^+$ 이온은 결정학적 자리III'에 존재하고 골조 산소와 각각 $2.86(2){\AA},\;2.96(4){\AA}$의 결합거리를 이룬다. The crystal structures of $Sr_{31}K_{30}-X\;(Sr_{31}K_{30}Si_{100}A1_{92}O_{384};\;a=25.169(5) {\AA}$) and $Sr_{8.5}Tl_{75}-X (Sr_{8.5}Tl_{75}Si_{100}A1_{92}O_{384};\;a=25.041(5) {\AA}$) have been determined by single-crystal X-ray diffraction techniques in the cubic space group $\=F{d3}\;at\;21(1)^{\circ}C$. Each crystal was prepared by ion exchange in a flowing stream of aqueous $Sr(ClO_4)_2\;and\;(K\;or\;T1)NO_3$ whose mole ratio was 1 : 5 for five days. Vacuum dehydration was done at $360^{\circ}C$ for 2d. Their structures were refined to the final error indices $R_1=0.072\;and\;R_w=0.057$ with 293 reflections, and $R_1= 0.058\;and\;R_w=0.044$ with 351 reflections, for which $I>2{\sigma}(I)$, respectively. In dehydrated $Sr_{31}K_{30}-X,\;all\;Sr^{2+}$ ions and $K^+$ ions are located at five different crystallographic sites. Six-teen $Sr^{2+}$ ions per unit cell are at the centers of the double six-rings (site I), filling that position. The remaining 15 $Sr^{2+}$ ions and 17 $K^+$ ions fill site II in the supercage. These $Sr^{2+}$ and $K^+$ ions are recessed ca $0.45{\AA}\;and\;1.06{\AA}$ into the supercage, respectively, from the plane of three oxygens to which each is bound. ($Sr-O=2.45(1){\AA}\;and\;K-O=2.64(1){\AA}$) Eight $K^+$ ons occupy site III'($K-O=3.09(7){\AA}\;and\;3.11(10){\AA}$) and the remaining five $K^+$ ions occupy another site III'($K-O=2.88(7){\AA}\;and\;2.76(7){\AA}$). In $Sr_{8.5}Tl_{75}-X,\;Sr^{2+}\;and\;Tl^+$ ions also occupy five different crystallographic sites. About 8.5 $Sr^{2+}$ ions are at site I. Fifteen $Tl^+$ ions are at site I' in the sodalite cavities on threefold axes opposite double six-rings: each is $1.68{\AA}$ from the plane of its three oxygens ($T1-O=2.70(2){\AA}$). Together these fill the double six-rings. Another 32 $Tl^+$ ions fill site II opposite single six-rings in the supercage, each being $1.48{\AA}$ from the plane of three oxygens ($T1-O=2.70(1){\AA}$). About 18 $Tl^+$ ions occupy site III in the supercage ($T1-O=2.86(2){\AA}$), and the remaining 10 are found at site III' in the supercage ($T1-O=2.96(4){\AA}$).

체험경제이론에 의한 북큐레이션 교육 프로그램이 지각된 가치와 지속적 참여 의도에 미치는 영향에 관한 연구

김미정,이병기,Kim, Mi-Jung,Lee, Byeong-Kee 한국도서관정보학회 2022 한국도서관정보학회지 Vol.53 No.3

By developing and implementing a book curation education program that reflects the experiential economy theory, this study aims to verify the effect that experience perception of the program has on continuous participation intention and perceived value of the program. Teaching and learning activities of book curation education programs were organized so that practitioners can experience activities for 4 experience element, entertainment experience, educational experience, escapist experience, esthetic experience according to experience economic theory. This study surveyed 195 peoples who participated in the program to measure the effectiveness of the program. As a result of analysis, research hypothesis 1 (the perception of experiences in the book curation education program affects the perceived value of the program) revealed that aesthetic and entertainment experiences were significant, and research hypothesis 2 (the perception of experience in the book curation education program affects the intention to continue participating in the program) showed that all other factors except educational experiences were significant.

팔찌자석 3개를 삼킨 후 동반된 위궤양 1례

김미정,곽애정,최광해,Kim, Mi-Jung,Kwak, Ae-Jung,Choi, Kwang-Hae 대한소아소화기영양학회 2002 Pediatric gastroenterology, hepatology & nutrition Vol.5 No.1

비록 크기가 크지 않고, 가장자리가 뾰족하거나 날카롭지 않지만, 1개 이상의 자석을 삼킨 경우나 혹은 자석과 금속류를 함께 삼킨 경우에는 장의궤양, 천공, 누공 등의 합병증을 일으킬 수 있으므로 신속한 제거가 필요할 것으로 생각되며, 저자들은 3개의 팔찌자석을 삼킨 후 동반된 위궤양 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. The accidental swallowing of foreign body is a common problem in the children. We describe the case of 37-month-old girl in whom a gastric ulcer was caused by the ingestion of three magnets. This case report demonstrates that if more than one magnet were swallowed, they should be removed even if there are no sharp edges and small size. Because the magnets will attract each other and hold the intestinal walls between them, causing necrosis and resulting in intestinal perforation or a fistula.