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.

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).

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.

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.

중환자실 간호사의 생애말 간호수행에 미치는 영향요인

김미정,장희경,Kim, Mi Jung,Chang, Hee Kyung 국제문화기술진흥원 2021 The Journal of the Convergence on Culture Technolo Vol.7 No.3

본 연구는 중환자실 간호사의 도덕적 고뇌, 윤리적 환경, 생애말 간호 어려움 및 긍정심리자본이 생애말 간호수행에 미치는 영향을 파악하기 위한 서술적 상관관계 연구이다. 대상자는 G도의 J시와 C시에 위치한 G대학병원 중환자실에서 근무하는 간호사 144명으로, 2020년 10월부터 11월까지 설문조사를 통해 자료수집하였다. 자료분석은 SPSS/WIN 21.0 프로그램을 이용하여 통계 분석하였다. 본 연구결과 대상자의 생애말 간호수행은 결혼상태, 생애말 간호 교육경험에 따라 유의한 차이가 있는 것으로 나타났다. 중환자실 간호사의 생애말 간호수행에 유의한 영향을 미치는 변인은 긍정심리자본, 생애말 간호 어려움으로 설명력은 24.8%였다. 이러한 결과를 바탕으로 중환자실 간호사의 생애말 간호수행을 향상시키기 위해서는 생애말 간호 어려움을 감소시키고, 긍정심리자본을 향상시킬 수 있는 교육과 중재 프로그램 개발이 요구된다. This study is a descriptive research study to identify the relationship between the performance of end-of-Life care of ICU nurses, moral distress, ethical climate, difficulties in end-of-life care, and positive psychological capital. Data were collected with structured questionnaires from 144 ICU nurses at a university hospital in J city, Gyeongnam, from October to November in 2020, and analyzed using SPSS/WIN 21.0. The subjects' performance of end-of-life care of ICU nurses is significantly different depending on marital status, experiences of end-of-life care education. The variables that had a significant effect on the performance of end-of-life care among ICU nurses were positive psychological capital and difficulties in end-of-life care. The explanatory power was 24.8%. Based on these results, it is necessary to intervention program and education to reduce difficulties in end-of-life care and increase positive psychological capital for ICU nurses.

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 ($T1-O=2.96(4){\AA}$).

영아에서 경련을 동반한 저칼슘혈증에 관한 연구

김미정,고철우,구자훈,Kim Mi-Jung,Ko Cheol-Woo,Koo Ja-Hoon 대한소아신장학회 1998 Childhood kidney diseases Vol.2 No.1

목적 : 최근 6개월 이하의 영아에서 저칼슘혈증의 임상 경험의 예가 증가하여 이의 원인, 증세, 치료 및 임상 경과를 알아보기 위하여 본 연구를 시행하였다. 방법 : 1994년 2월 부터 1991년 4월까지 경북대학교 병원 소아과에 경련을 주소로 내원하였던 환아 중 그 원인이 저칼슘혈증으로 확인되었던 11예를 대상으로 하였다. 이들은 모두 6개월 이하였으며 평균 $2.2{\pm}1.1$개월이었다. 이들 환아의 병력지를 통하여 후향적으로 각종 검사를 분석하였다. 결과 : 이 환아들의 저칼슘혈증의 원인으로는 비타민 D 결핍이 8예였고, 무기인의 과다한 섭취가 3예였다. 경련의 양상은 전신성 간-근대성이 9예였고 부분 근대성이 2례였다. 경련의 지속시간은 30초에서 20분까지 다양하였으며, 경련의 횟수는 평균 6.5회였다. $Bonky^{(R)}$, 칼슘 단독 또는 병합 요법 후 혈청 칼슘은 치료 전 $6.3{\pm}0.9$ mg/dL서 치료 후 $9.9{\pm}1.7$ mg/dL로 통계학적으로 의미있게 증가하였고(P=0.0008), 혈청 ALP는 치료 전 $1,418{\pm}864$ U/L에서 치료후 $772{\pm}503$ UL로 통계학적으로 의미있게 감소하였다(P=0.0112). 입원 당시 iPTH은 $176.7{\pm}129$ pg/mL로 증가되어 있었고 3명의 환아에서 치료 이후 추후 검사상 정상 범위로 회복 되었다. 모든 환아에서 치료 전$25(OH)D_3$는 감소되어 있었으며 평균 $3.9{\pm}2.7$ ng/mL였고, 치료 후 1예에서 정상으로 회복되었다. $1,25(OH)_{2}D_{3}$는 6예 중 2예에서 감소되어 있었다. 결론 : 최근 비타민 D가 보강된 것으로 알려진 조제 분유 영양아에서 발생된 경련을 동반한 저칼슘혈증의 원인은 상당수에서 비타민 D 결핍이었으며 $1,25(OH)_{2}D_{3}$의 단기간 투여로 성공적으로 치료되었으며, 조제 분유 영양아에서도 저칼슘혈증의 원인으로 비타민 D 결핍을 반드시 생각해야 한다고 사료 된다. Purpose : Hypocalcemia is one of the major causes of convulsion in infants. The causes of hypocalcemia are hypoparathyroidism, deficiency and metabolic abnormalities of vitamin D, or increased uptake of inorganic phosphorous, etc. We analyzed the causes, symptoms and signs, treatment, and clinical courses of hypocalcemia as, recently, there were many clinical experiences of hypocalcemic infants under age of 6 months in the department of pediatrics, Kyungpook University Hospital. Objects and Methods : The authors observed 11 infants with hypocalcemia who had been admitted to the department of pediatrics, Kyungpook University Hospital, during the period of February 1992 to April 1997. Various clinical and laboratory data concerning causes, clinical courses and treatment of hypocalcemia were analyzed retrospectively Results : (1) The sex incidence revealed male predominance with male to female ratio 4.5 : 1. The mean age at onset of symptoms was $2.2{\pm}1.1$ months old. (2) The causes of hypocalcemia were vitamin D deficiency in 8 cases and excessive inorganic phosphate intake in 3 cases. (3) All eleven patients manifestated convulsion which was generalized tonic-clonic in 9, and focal clonic in 2 cases. (4) Serum calcium concentrarion increased from $6.3{\pm}0.9$ mg/dL to $9.9{\pm}1.7$ mg/dL after therapy of $1,25(OH)_{2}D_{3}$ with or without calcium(P=0.0008), and serum ALP concentration decreased from $1,418{\pm}864$ U/L to $772{\pm}503$ U/L (P=0.0112). Serum iPTH levels were high in all 11 patients initially. All showed decreased $25(OH)D_3$ levels initially. (5) All patients were treated successfully with $1,25(OH)_{2}D_{3}$ and/or calcium supplement. Conclusions : Vitamin D deficiency should be considered as one of the causes of hypocalcemia even in formula(known as vitamin fortified) feeding infants. Fortunately, they were successfully treated with $1,25(OH)_{2}D_{3}$.