Effective connectivity during working memory and resting states: A DCM study

Jung, Kyesam,Friston, Karl J.,Pae, Chongwon,Choi, Hanseul H.,Tak, Sungho,Choi, Yoon Kyoung,Park, Bumhee,Park, Chan-A,Cheong, Chaejoon,Park, Hae-Jeong Elsevier 2018 NeuroImage Vol.169 No.-

<P><B>Abstract</B></P> <P>Although the relationship between resting-state <I>functional</I> connectivity and task-related activity has been addressed, the relationship between task and resting-state directed or <I>effective</I> connectivity – and its behavioral concomitants – remains elusive. We evaluated effective connectivity under an N-back working memory task in 24 participants using stochastic dynamic causal modelling (DCM) of 7 T fMRI data. We repeated the analysis using resting-state data, from the same subjects, to model connectivity among the same brain regions engaged by the N-back task. This allowed us to: (i) examine the relationship between intrinsic (task-independent) effective connectivity during resting (A<SUB>rest</SUB>) and task states (A<SUB>task</SUB>), (ii) cluster phenotypes of task-related changes in effective connectivity (B<SUB>task</SUB>) across participants, (iii) identify edges (B<SUB>task</SUB>) showing high inter-individual effective connectivity differences and (iv) associate reaction times with the similarity between B<SUB>task</SUB> and A<SUB>rest</SUB> in these edges. We found a strong correlation between A<SUB>rest</SUB> and A<SUB>task</SUB> over subjects but a marked difference between B<SUB>task</SUB> and A<SUB>rest</SUB>. We further observed a strong clustering of individuals in terms of B<SUB>task</SUB>, which was not apparent in A<SUB>rest</SUB>. The task-related effective connectivity B<SUB>task</SUB> varied highly in the edges from the parietal to the frontal lobes across individuals, so the three groups were clustered mainly by the effective connectivity within these networks. The similarity between B<SUB>task</SUB> and A<SUB>rest</SUB> at the edges from the parietal to the frontal lobes was positively correlated with 2-back reaction times. This result implies that a greater change in context-sensitive coupling – from resting-state connectivity – is associated with faster reaction times. In summary, task-dependent connectivity endows resting-state connectivity with a context sensitivity, which predicts the speed of information processing during the N-back task.</P>

최정희의 <녹색의 문>에 나타난 여성 정체성 탐구 양상

최정아(Jung A Choi) 한국현대소설학회 2010 현대소설연구 Vol.- No.44

This thesis examines the process of women`s subjectivity developing as a historical subject, shown in <Green Door>, and studies the self-recognition as a female that is revealed during the process and the issue of feminine reality. Chapter 2 looks into the issue of women`s reemergence as the victim of `Imperialism` and `Ethnicity`, through the history of women`s suffering symbolized by Do Young-Hye and Yoo Bo-Hwa`s life. Do Young-Hye and Yoo Bo-Hwa both live a life of tragic suffering and ordeal after falling in love with and then parting with student activist Kim Yeong-Seo. The true nature of their tragedy is fully accounted for after the liberation, as Do Young-Hye is charged of being a female spy after the defection to North Korea of the communist man whom she dated, and as Yoo Bo-Hwa is burdened with all kinds of hardships of life ever since Lee Seong-Bae who raped her and forced her into marriage is killed after being revealed to be one of the pro-Japanese groups that cooperated with the Japanese Empire. While Yoo Bo-Hwa`s tragedy is caused by Japanese imperialism, Do Young-Hye`s tragedy is caused by ideology conflict between the left and right wing. However, the most fundamental cause that drives Do Young-Hye and Yoo Bo-Hwa`s life into tragedy is Kim Yeong-Seo. As Kim Yeong-Seo is a student thinker and a young nationalist, both Do Young-Hye and Yoo Bo-Hwa admire his patriotic aspect and falls in love with him. However, Kim Yeong-Seo deems Do Young-Hye as a mere object of sexual desire, and not only does he repudiate her harshly but also judges her as a prosecutor when Do Young-Hye is on trial charged of being a spy. Such duality of Kim Yeong-Seo can be seen as criticism towards the fact that the immense discourse of `Ethnicity`, which is an important factor that forms women`s identity of the colonial era, carries aspects of oppression against women. Furthermore this implies that during the colonial era, in which the carrying of `Ethnicity` was inevitable, the reemergence of women`s identity would have been established under the state of such oppressive conditions internalized. For example, the meaning of the `Maternity` discourse can be reconsidered by the fact that the emphasis on maternity in Choi Jung-Hee`s novel published during the colonial era is a strategy to establish feminine subjectivity through embracing the identity as a mother that `Ethnicity` demands. In this perspective, <Green Door> evidently shows a critical point of view that decomposes the `Ethnicity` discourse from a female`s standpoint as a post-colonial feminism text. Additionally in chapter 2, we can discover the significance as a female novel from the fact that through Yoo Bo-Hwa`s self-awakening it is perceived that all ideologies such as nationalism, imperialism, communism are ideologies of men, and the prospect of overcoming this through bondage of women is presented. Especially, Do Young-Hye accusing the contradiction within men`s ideology represented by Kim Yeong-Seo during the trial, and inversely changing the trial stage into a stage of judgment of men`s sins toward the history of women`s suffering can be evaluated as acquiring a symbolic figure about women as a historical subject. In chapter 3, we examined the process of self-recognition as a women being revealed, from the perspective of intensification of feminine reality exposed through the method in which Yoo Bo-Hwa`s inner consciousness is formed, this is to say through such as mirror, wind, sky, and color images. For the various phases of development that Yoo Bo-Hwa shows, for example body, love, parting, violence, marriage, childbirth and etc, in each point of transition Yoo Bo-Hwa`s inner world is expressed through various objective correlatives such as mirror, wind, sky, color images, and this appears as Choi Jung-Hee`s unique way of constructing feminine reality. <Green Door> which charges `Imperialism` and `Ethnicity` as oppressive male ideologies, is a work that embodies the pu

청가시덩굴 추출물의 기능성 원료 표준화를 위한 지표성분 Resveratrol, trans-Scirpusin A의 분석법 개발 및 검증

권진관(Jin Gwan Kwon),정연우(Yeon Woo Jung),최윤혁(Yun-Hyeok Choi),이지은(Ji Eun Lee),정원식(Wonsik Jeong),이정아(Jung A Lee),최춘환(Chun Whan Choi),안은경(Eun-Kyung Ahn),최용문(Yongmun Choi),홍성수(Seong Su Hong) 한국식품영양과학회 2022 한국식품영양과학회지 Vol.51 No.11

본 연구는 HPLC를 이용하여 청가시덩굴 추출물을 개별인정형 건강기능식품의 기능성 원료로 개발하기 위한 원료 표준화의 일환으로, 청가시덩굴 추출물의 지표성분을 resveratrol과 trans-scirpusin A로 설정하고 이에 대한 HPLC 분석법을 확립하여 유효성의 검증을 실시하였다. 분석법 유효성 검증은 특이성, 직선성, 정확도, 정밀도, 검출한계 및 정량한계 등을 통해 분석법의 신뢰성을 검증하였으며, 그 결과 표준용액과 청가시덩굴 추출물 간의 HPLC 크로마토그램 및 UV spectrum의 일치 여부 등의 비교를 통해 다른 물질과 간섭 없이 피크가 분리된 것으로 특이성을 확인하였다. 또한 표준용액 검량선의 상관계수(R²)는 0.9999로 매우 우수한 직선성으로 관찰되어 분석에 적합한 것으로 확인되었으며, 검량선의 기울기 및 표준편차를 이용한 검출한계는 resveratrol이 0.98 μg/mL, trans-scirpusin A는 0.49 μg/mL였고 정량한계는 resveratrol이 2.98 μg/mL, trans-scirpusin A는 1.48 μg/mL로 각각 확인되었다. 청가시덩굴 추출물에 표준물질을 3개 농도 첨가하고 분석한 회수율은 resveratrol이 98.77~99.24%, trans-scirpusin A는 98.45~99.45%로 나타나 정확성이 있는 것을 확인할 수 있었다. 청가시덩굴 추출물의 조제 농도 2.2, 4.4 및 6.6 mg/mL에서 반복성은 resveratrol이 0.99~1.22%, trans-scirpusin A는 1.12~1.32%를, 실험실 내 정밀성에서는 일내 정밀성은 resveratrol이 0.67~0.87%, trans-scirpusin A는 1.18~1.33%로 나타났고 일간 정밀성은 resveratrol이 0.93~1.22%, trans-scirpusin A는 1.33~2.27%로 확인되어 본 분석법은 정밀성이 있음을 확인할 수 있었다. 이상의 분석결과를 통해 확립된 청가시덩굴 추출물의 지표성분인 resveratrol과 trans-scirpusin A의 HPLC 분석법은 적합한 시험법으로 검증되었으며, 본 시험법은 향후 청가시덩굴 추출물의 건강기능식품 기능성 원료 개발과 표준화를 위한 기초자료로 활용될 것으로 사료된다. This study was undertaken to establish an analytical method using high-performance liquid chromatography (HPLC). HPLC for the standard determination of resveratrol and trans-scirpusin A as functional ingredients in Smilax sieboldii extract. We evaluated the specificity, linearity, accuracy, precision, limit of detection (LOD), and limit of quantitation (LOQ) of various analytical methods for detecting resveratrol and trans-scirpusin A using HPLC. The specificity was confirmed by the chromatogram obtained using the HPLC analytical method. Also, the results of UV and the coefficient of correlation (R²) obtained was 0.999, which confirmed that this was a suitable analysis with high linearity. The LOD was 0.98, 0.49 μg/mL, and LOQ was 2.98, 1.48 μg/mL, which was confirmed as a suitable limit level for the analysis of resveratrol and trans-scirpusin A content in the S. sieboldii extract. The recovery of resveratrol and trans-scirpusin A content was determined to be 98.77±0.73∼99.24±1.47% and 98.45±1.18∼99.45±1.66%, respectively, indicating high accuracy. The intra-day repeatability and the intra-laboratory precision of the daily repetition were confirmed to be 0.67∼0.87%, 1.18∼1.33% and 0.93∼1.22%, 1.33∼2.27%, respectively, for trans-scirpusin A, for the relative standard deviation. These results indicate that the reported HPLC method is simple, reliable, and reproducible for the detection of resveratrol and trans-scirpusin A in S. sieboldii extract.

Human coagulation factor VIII domain-specific recombinant polypeptide expression

Choi, Su Jin,Jang, Ki Jung,Lim, Jeong-A,Kim, Hye Sun Korean Society of Hematology; Korean Society of Bl 2015 Blood Research Vol.50 No.2

<P><B>Background</B></P><P>Hemophilia A is caused by heterogeneous mutations in <I>F8</I>. Coagulation factor VIII (FVIII), the product of <I>F8</I>, is composed of multiple domains designated A1-A2-B-A3-C1-C2. FVIII is known to interact with diverse proteins, and this characteristic may be important for hemostasis. However, little is known about domain-specific functions or their specific binding partners.</P><P><B>Methods</B></P><P>To determine <I>F8</I> domain-specific functions during blood coagulation, the FVIII domains A1, A2, A3, and C were cloned from Hep3B hepatocytes. Domain-specific recombinant polypeptides were glutathione S-transferase (GST)- or polyhistidine (His)-tagged, over-expressed in bacteria, and purified by specific affinity chromatography.</P><P><B>Results</B></P><P>Recombinant polypeptides of predicted sizes were obtained. The GST-tagged A2 polypeptide interacted with coagulation factor IX, which is known to bind the A2 domain of activated FVIII.</P><P><B>Conclusion</B></P><P>Recombinant, domain-specific polypeptides are useful tools to study the domain-specific functions of FVIII during the coagulation process, and they may be used for production of domain-specific antibodies.</P>

간호대생과 의대생의 간호사 이미지 비교

구민진,김수영,방정민,서아영,양희진,윤소람,이윤재,이재은,이지연,정윤경,최수정 이화여자대학교 간호과학대학 2014 이화간호학회지 Vol.- No.48

Purpose: This study aims to analyze the difference in the perception that nursing students and medical students have regarding the image of nurses. Method: The sampling group for this study was made up of 111 nursing students and 117 medicine students, conducted from the 19th August 2013 to 3rd September 2013. The tool used for this study is the “Nurse Image Scale”. The data is analyzed using the SPSS 21.0 program, technical stats, t-test and ANOVA with Scheffe test. Result: There was a notable difference in the results(t=6.94, p<001), with the average image perception score of nurses at 3.84±0.34 amongst nursing students being higher than the 3.50±0.38 amongst Medicine students. The average score of the 4 areas tested, “Qualification of a Nurse”, “Role of a Nurse”, “Social Participation of a Nurse” and “Interpersonal Skills of a Nurse” were all marked higher by the nursing students than the medicine students. The average score became notably higher as the period of practice became shorter with nursing students (F=4.21, p=.043). Furthermore, the average score for the “Qualification of a Nurse” was notably higher as the period of practice became shorter (F=3.98, p=.049). Medical students gave an average score for the “Qualification of a Nurse”(F=3.72, p=.027) and the “Interpersonal Skills of a Nurse”(F=4.11, p=.019) which was relative to the development of a nurse’s image, while the average score for the “Role of a Nurse” was notably higher with a longer period of practice(F=6.65, p=.011). Conclusion: The results of this study suggest that the image perception of a nurse can vary depending on the experience in period of practice. Therefore, together with this study conducted with nursing students and medicine students, there is a need for further studies conducted on image perception of nurses with various experience in period of practice.

지역불균형 시각에서 인천경제자유구역과 원도심과의 상호작용 분석: 인천시 중구, 연수구 및 서구를 중심으로

정진원(Jung, Jin-Won),최민아(Choi, Min-A) 인천발전연구원 2021 도시연구 Vol.- No.19

본 연구는 지역불균형 시각에서 인천경제자유구역과 각 자치구 원도심과의 상호작용 분석을 실시하였다. 지역의 경제성장과정에서 불균형 발전을 논한 A. Hirschman과 G. Myrdal은 경제발전 초기에는 성장 잠재력이 높은 거점지역이 주변지역의 많은 경제활동들을 흡수하는 분극화(역류) 효과 이후 누적(파급)효과가 나타는데 A. Hirschman은 불균형 발전의 완화를 가져온다고 주장하는 반면, G. Myrdal은 불균형 발전의 누적적 가속화가 진행된다고 주장한다. 2003년 인천경제자유구역 지정이후 18년 가량 지난 시점에서 각 자치구와의 경제요소간 상호작용 분석 결과, 인천경제자유구역 각 지구와 자치구 원도심간의 불균형 발전이 심화되는 것으로 나타났다. 이러한 불균형 발전을 완화하기 위해, 중구 원도심 활성화, 서구 및 연수구 원도심의 정주성 제고, 보행친화적 연계를 위한 공간계획 수립 및 IFEZ에서 원도심으로 파급효과를 야기할 수 있는 산업경제정책 마련 등이 필요함을 제시하였다. This study analyzed the interaction between the Incheon Free Economic Zone (IFEZ) and the old downtown of each autonomous district from a perspective of regional imbalance. In discussing uneven development in the economic growth process of a region, Hirschman and Myrdal argue that in the early stages of economic development, a regional base with high growth potential has a trickle-down (spread) effect after the polarized (back-wash) effect in that it absorbs a lot of economic activities from surrounding areas. However, while Hirschman argues that this mitigates uneven development, Myrdal argues that cumulative acceleration of uneven development continues. About 18 years after the designation of the IFEZ in 2003, this analysis of the interaction between economic factors of each autonomous district revealed that uneven development between each district of the IFEZ and the old downtowns of autonomous districts has been deepening. To alleviate this uneven development, this study suggested the necessity to revitalize the old downtown of Jung-gu, enhance the settlement of the old downtowns of Seo-gu and Yeonsu-gu, establish a space plan for pedestrian-friendly connections, and prepare industrial economic policies that can bring trickle-down effects from IFEZ to old downtowns, and so on.

Human coagulation factor VIII domain-specific recombinant polypeptide expression

Su Jin Choi,Ki Jung Jang,Jeong-A Lim,Hye Sun Kim 대한혈액학회 2015 Blood Research Vol.50 No.2

BackgroundHemophilia A is caused by heterogeneous mutations in F8. Coagulation factor VIII (FVIII),the product of F8, is composed of multiple domains designated A1-A2-B-A3-C1-C2. FVIIIis known to interact with diverse proteins, and this characteristic may be important forhemostasis. However, little is known about domain-specific functions or their specificbinding partners. MethodsTo determine F8 domain-specific functions during blood coagulation, the FVIII domainsA1, A2, A3, and C were cloned from Hep3B hepatocytes. Domain-specific recombinantpolypeptides were glutathione S-transferase (GST)- or polyhistidine (His)-tagged,over-expressed in bacteria, and purified by specific affinity chromatography. ResultsRecombinant polypeptides of predicted sizes were obtained. The GST-tagged A2 polypeptideinteracted with coagulation factor IX, which is known to bind the A2 domain of activatedFVIII. ConclusionRecombinant, domain-specific polypeptides are useful tools to study the domain-specificfunctions of FVIII during the coagulation process, and they may be used for productionof domain-specific antibodies.

DACUM 기법에 의한 병원 임상영양사의 직무기술서 개발

차진아 ( Jin A Cha ),김강은 ( Kang Eun Kim ),김은미 ( Eun Mi Kim ),박미선 ( Mi Sun Park ),박유경 ( Yoo Kyoung Park ),백희준 ( Hee Joon Baek ),이송미 ( Song Mi Lee ),최수경 ( Soo Kyong Choi ),서정숙 ( Jung Sook Seo ) 대한영양사협회 2013 대한영양사협회 학술지 Vol.19 No.3

본 연구에서는 DACUM 기법을 통해 국내 병원 임상영양사의 직무를 조사 및 분석하고 그 결과를 바탕으로 도출된 임상영양사의 직무기술서를 평가함으로써 병원 임상영양사를 위한 직무기술서를 개발하고자 하였다. 2011년 7월초에 DACUM 워크숍을 통해 1차적으로 직무기술서를 도출하고 전문가 집단의 자문회의와 Delphi 조사 방법을 적용한 표적집단 면접을 통해 수정 및 보완 작업을 거쳐 직무기 술서를 도출하였다. DACUM 위원회의 패널로는 3차 의료기관에 종사하고 있는 현직 임상영양사 9인과 임상영양학을 전공하는 교수 4인, 직무분석을 담당하는 교수 1인 등 총 14명이 참여하였다. 전문가 자문단을 별도로 구성하였으며, 의사 1인, 간호사 1인, 임상영양분야 실무자 및 교수 5인이 포함된 전문가의 의견을 추가적으로 수렴하였다. 도출된 직무기술서는 2011년 7∼8월까지 전국 500병상 이상의 종합 병원 90개 중 설문조사에 응답한 46개 병원에서 각각 임상영양 실무책임자 1인으로부터 수집한 자료를 분석하여 현장 적합성을 평가하였다. 본 연구의 결과를 요약하면 다음과 같다. 1. 본 연구에서 DACUM 기법에 의해 처음 도출된 직무는 총 8개의 직무, 33개의 과업, 114개의 과업요소였으나 수정 보완작업을 거쳐 총 7개의 직무, 27개의 과업과 93개의 과업요소로 재분류되었다. 최종적으로 병원 임상영양사의 직무는 영양판정(A), 영양진단(B), 영양중재(C), 영양모니터링ㆍ평가(D), 자문ㆍ협력(E), 영양연구(F), 자기계발(G)로 도출되었다. 2. 각 직무영역별로 세부내용을 보면, (A) 영양판정은 A1. 영양 초기평가하기, A2. 식품영양관련 자료 수집·평가하기, A3. 의학적 자료 점검하기, A4. 신체계측 자료 수집·평가하기, A5. 신체증상 자료 점검하기, A6. 개인력 및 과거력 점검하기, A7. 영양 요구량 결정하기, A8. 영양판정 기록하기의 8개의 과업으로 구분하였다. (B) 영양진단은 B1. 영양진단 도출하기, B2. 우선순위 정하기, B3. 영양진단 기록하기로 나뉘었고, (C) 영양 중재는 C1. 영양중재 계획하기, C2. 영양처방 관리하기, C3. 영양상담하기, C4. 영양교육하기, C5. 영양집중지원하기, C6. 영양중재 기록하기로 구분 하였다. (D) 영양모니터링·평가는 4개의 과업으로 D1. 영양상태 모니터하기, D2. 영양중재과정 모니터하기, D3. 영양중재 결과 평가하기, D4. 영양모니터링·평가 기록하기로 구분하였다. (E) 자문·협력은 E1. 영양자문하기, E2. 협력관계 구축 및 유지하기로 (F) 영양연구는 F1. 질 향상 활동하기, F2. 연구 활동하기로 분류하였다. 마지막으로 (G) 자기계발은 G1. 전문성 향상, G2. 자기관리가 포함되었다. 3. 도출된 임상영양 직무기술서에 대한 평가를 위해 설문조사에 참여한 대상 병원의 유형은 상급종합 병원이 65.2%를 차지하였으며, 종합병원은 34.8%였다. 병원의 재원일수는 8.0±1.5일이었으며 병원 조직에서 영양부서는 6곳을 제외한 39개의 병원에서 진료부서 또는 진료지원부서에 속하였다. 또한 병원에서 영양부서가 단독으로 편제되어 있는 경우가 93%로 높은 비율을 보였다. 병원 임상 영양사의 성별은 여자가 100%로 나타났으며, 연령별 분포는 40∼49세가 가장 높은 비율을 보였다. 근무경력은 10년 이상인 경우가 50% 이상을 차지하였고 최종학력은 석사졸업이 가장 높은 것으로 나타났다. 4. 전체 과업요소의 인지된 중요도를 비교하면 6개의 과업요소를 제외한 대부분의 과업요소들이 4.0점 이상이었고 총 7개 직무영역에 대한 중요도는 ‘영양중재’가 4.6±0.6점으로 가장 중요도가 높게 나타났으며, ‘영양진단’과 ‘영양모니터링·평가’의 직무가 4.5점 이상으로 비교적 높게 조사 되었다. 전체 과업요소 중 수행도가 4.5점 이상으로 매우 자주 수행되는 과업요소가 13개, 4.0점 이상의 자주 수행되는 과업도 29개의 과업요소로 나타났으며, 직무영역 중 ‘영양중재’가 4.2±1.0점으로 높게 나타났다. 직무영역별 난이도를 조사한 결과에서는 ‘영양연구’ 업무가 4.1±0.9점으로 가장 높게 조사되었다. ‘영양진단’과 ‘자문·협력’은 각각 3.8±1.0점, 3.7±0.9점으로 비교적 어렵게 인식되는 직무로 나타났다. 직무영역별 과업요소 전체의 중요도, 수행도, 난이도의 평균은 각각 4.5±0.8점, 3.7±1.3점, 3.5±1.0점으로 나타났으며 유의적인 차이가 나타났다(P<0.001). 5. 임상영양사 업무의 중요도와 수행도 사이의 관계를 나타낸 격자도 분석에서 영양 초기평가하기, 영양요구량 결정하기, 영양판정 기록하기, 영양진단 도출하기, 영양중재 계획하기, 영양처방 관리하기, 영양교육하기, 영양집중지원하기, 영양중재 기록하기, 영양상태 모니터하기, 영양중재 과정 모니터하기는 중요도와 수행도가 모두 높은 영역(doing great)에, 식품영양관련 자료수집·평가하기, 의학적 자료 점검하기, 신체계측 자료수집·평가하기, 신체증상 자료 점검하기, 개인력 및 과거력 자료 점검하기, 영양진단의 우선순위 정하기, 영양진단 기록하기, 영양상담하기, 영양 모니터링·평가 기록하기는 수행도는 높으나 중요도가 낮은 영역(overdone)에 속하였다. 중요도가 높으나 수행도가 낮은 영역(focus here)에는 협력관계 구축 및 유지하기, 질 향상 활동하기가 속하였고, 중요도와 수행도가 모두 낮은 영역(low priority)은 영양중재 평가하기, 영양 자문 활동하기, 연구 활동하기, 전문성 향상하기, 자기관리하기가 속하는 것으로 나타났다. 이상의 결과를 볼 때, 본 연구에서 DACUM 기법에 의해 개발된 병원 임상영양사의 직무기술서는 현장에서 임상영양서비스를 수행하는데 가이드라인으로 사용될 수 있을 것으로 여겨지며, 인지된 중요도가 평균 이상으로 높지만 그에 비해 수행도가 미흡한 과업들에 대하여는 임상영양사에 대한 교육 실시, 업무 분담, 적정인원 배치 등 제도적인 뒷받침을 마련하여 수행도를 높일 수 있는 방안이 강구 되어야 할 것이다. 또한 질병별 맞춤형 임상영양 업무에 관한 후속연구를 통하여 보다 전문적인 환자 영양치료가 가능할 것으로 여겨진다. The present study was conducted to develop a standardized job description for clinical dietitians working in hospitals. A developing curriculum (DACUM) method was used for the job analysis of clinical dietitians. Based on DACUM analysis with 14 members, including clinical dietitians and professors majoring in clinical nutrition and job analysis, information on the duties, tasks, and task elements of clinical dietitians was determined. To verify the job descriptions derived from DACUM analysis, a total of 46 tertiary and general hospitals with over 500 beds were recruited for the survey. The final developed job description for clinical dietitians included 7 duties, 27 tasks, and 93 task elements. The duties consisted of nutritional assessment, nutrition diagnosis, nutrition intervention, nutrition monitoring·evaluation, consultation·cooperation, nutrition research, and self-development. The mean scores of perceived importance, performance, and difficulty on the clinical dietitian`s task elements (out of a maximum score of 5.0) were 4.5, 3.7, and 3.5, respectively, with significant differences between the items (P<0.001). The perceived importance and performance grid of clinical dietitian`s tasks showed that “construction and maintenance of collaboration” (E2) and “activity of quality improvement” (F1) received relatively low scores for performance despite their high importance scores; thus the performance of these tasks requires significant improvement. In conclusion, the job descriptions of clinical dietitians developed from this study are useful for the qualitative improvement of clinical nutrition services in hospitals.

CMOS Transistors with a 70-nm Gate Length for 0.13-μm-Node High-Performance Applications

Kyoung-Seok Rha,Dong-Hun Lee,Eun-Seung Jung,Hae-Kyung Kong,Hyae-Ryoung Lee,Jeong-Ho Lyu,Jeong-Hwan Yang,Jin-Suk Jung,Jung-A Choi,Kwang-Pyuk Suh,Young-Wug Kim 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.1

Conventional CMOS transistors for high performance with a 70-nm physical gate length were fabricated to evaluate the 130-nm-technology node. In this work, we enhanced the performance of transistors by using high-dose P+ implantation, a plasma-nitridation gas oxide, a hydrogen prebake (HPB), and a mechanical stress layer. We also reduced the overlap capacitances by using an oset spacer. The NMOS and PMOS have drive currents equal to 880 A/m and 420 A/m, respectively, with Ioff = 10 nA/m at Vdd = 1.2 V. The unit delay of the ring oscillator (1 fan-out) was 11.5 ps.

Clostridium difficile에 의한 설사의 예후인자

김준형,김희정,구남수,김영근,최준용,신소연,박윤선,김연아,김명수,정수진,최희경,송영구,이경원,김준명 대한감염학회 2007 감염과 화학요법 Vol.39 No.2

배경 : Clostridium difficile에 의한 설사(Clostridium difficile associated diarrhea; CDAD)는 임상 경과가 다양하다. 최근에 유럽과 북미에서 C. difficile 감염의 발생률이 증가하고 고전적 치료에 잘 반응하지 않으며 이환률이 증가하였고, 이러한 원인이 새로운 균주의 탄생에 기인한다고 보고되었다. CDAD의 예후에 영향을 미치는 세균성 요인과 숙주 요인을 확인하기 위해 본 연구를 진행하였다. 재료 및 방법 : 2002년 8월부터 2003년 12월까지 CDAD가 진단된 20세 이상인 환자들을 대상으로 후향적 Cohort 연구를 하였다. 세균성 요인을 확인하기 위해 cdt A, cdtB, tcd A, tcd A rep 그리고 tcd B 유전자(binary toxin)를 확인하였다. 설사가 치료 시작 후 11일 이상 지속되거나, 2달 이내에 재발하거나, 수술 혹은 다른 시술이 필요한 경우, 사망한 경우 예후가 좋지 않은 것으로 정의하였다. 결과 : 총 115예에서 toxin을 생성하는 C. difficile가 동정되었으며, Toxin A와 toxin B 모두 양성인 균이 91예, toxin B만 양성인 균이 24예였다. Toxin A 생성 여부가 예후에 영향을 미치지 않았지만, 제산제를 사용한 환자에서 그렇지 않은 환자에 비해 toxin B만 양성인 균이 많이 동정되었다(P<0.05). 예후가 좋지 않은 경우는 39예(33.9%)였고 76예(66.1%)에서 예후는 양호하였다. 단변량 분석에서 70세 이상의 고령, 남성, 증상 발현 후 사용한 항생제의 개수 사용, 증상 발현 후 carbapenem, aminoglycoside, glycopeptide 사용, 당뇨 및 뇌졸중 병력이 있는 경우, 그리고 높은 Charlson index가 불량한 예후 인자로 확인되었다. 그러나 독립적인 예후 인자를 조사했을 때에는70세 이상의 고령(odds ratio=3.378, P=0.009), 증상 발현후 carbapenem 사용(odds ratio 7.210, P<0.001)이 예후에 중요한 영향을 미치는 요소로 확인되었다. 결론 : 70세 이상의 고령과 증상 발현 후 carbapenem 사용이 CDAD 독립적인 불량한 예후인자이다. Background : Clostridium difficile associated diarrhea (CDAD) has a wide range of clinical manifestations. The prognostic factors of CDAD are not fully understood. Materialsand Methods : A retrospective cohort study of 115 patients with CDAD from Aug. 2002 to Dec. 2003 was conducted to evaluate prognostic factors of CDAD. Bacteriologic factors were determined by detecting the binary toxin gene, tcd A, tcd A rep and tcd B gene. Poor prognosis was defined as diarrhea more than 10 days even with classic treatment, recurrence, death, and moribund discharge. Results : Approximately 79% of isolated strains were toxin A+/B+ strains and 21% were toxin A-/B+ strains. There was no difference in prognosis between toxin A+ and toxin A- strains. 39 (33.9%) cases showed poor prognosis and 76 (66.1%) cases showed good prognosis. Univariate analyses revealed that the poor prognostic factors were old age over 70 years old, male, the number of antibiotics used after onset of symptom, the administration of carbapenems, aminoglycosides, glycopeptides after onset of symptom, history of DM and stroke, and high Charlson comorbidity index. Multiple logistic regression analysis identified old age over 70 years old (odds ratio=3.378, P=0.009) and the administration of carbapenems after onset of symptom (odds ratio 7.210, P<0.001) as the independent poor prognostic factors. Conclusion : Old age over 70 and the administration of carbapenems after onset of symptom were the poor prognostic factors for CDAD caused by none-binary toxin producing strains.