간호대생들의 임상실습 스트레스, 학업적 자기효능감 및 진로정체감에 대한 연구

최유빈,최민지,이은형,이연우,우소연,하희주,허예지,박수현,허미래,이가현 이화여자대학교 간호과학대학 2015 이화간호학회지 Vol.- No.49

Purpose: The purpose of this study was to investigate clinical practice stress, academic self-efficacy, and career identity among undergraduate students in nursing practicum. Method: This study was a descriptive correlational design using the survey method. The study included 267 undergraduate students attending to 5 college in Seoul. The data was gathered from August 2014 to October 2014 and the data were analyzed using IBM SPSS statistics version 22.0 Program with descriptive statistics, t-test, analysis of variance with Scheffe test, and Pearson’s correlation coefficient. Results: Situational characteristics of Clinical Practice Stress(CPP) was significantly different with regards to task difficulties and efficacy self-confidence of academic self-efficacy(ASE) (r= .179, p= .003; r= .166, p= .006). Statistically significant positive relationship was founded between Personal characteristics of CPP and self-confidence of ASE (r= .239, p< .01). External regulators of CPP was significantly different according to self-confidence and task difficulties (r= .175, p= .003; r= .132, p= .028). The self-confidence and efficacy for self-confidence of ASE were a significantly correlated with Career Identity; The Career identity also was a significantly correlated with all sub-categories of CSS scale(r= -0.208, p< 0.01; r= -0.369, p< 0.01; r= -0.153, p< .011) Conclusion: This study showed positive statistical relationships associated with clinical practice stress, academic self-efficacy, and career identity as a preliminary evidence-based study for guiding education in nursing curriculum. Further research should be need for students’ future as a professional nurse.

Mirror pattern of cerebral artery atherosclerosis in patients with ischaemic stroke

Kim, Y. D.,Choi, H. Y.,Jung, Y. H.,Nam, C. M.,Yang, J. H.,Cho, H. J.,Nam, H. S.,Lee, K-Y.,Heo, J. H. Blackwell Publishing Ltd 2009 European Journal of Neurology Vol.16 No.10

<P>Background and purpose: </P><P>Although it has been suggested that bilateral symmetry of atherosclerosis can be found in paired arteries, including external carotid arteries and femoral arteries, it has remained unknown in intracranial arteries. We determined whether bilateral symmetry (a mirror pattern) of atherosclerosis presents in the entire cerebral arterial system.</P><P>Methods: </P><P>Angiographic findings of 795 consecutive patients with ischaemic stroke, after excluding those with cardiac sources of embolism or other causes of stroke, were reviewed retrospectively. The presence (location) and severity (the degree of stenosis) of atherosclerosis were compared between left and right sides at 26 predetermined arteries/segments.</P><P>Results: </P><P>We found 2230 lesions in predetermined segments/arteries from 669 patients. Amongst 509 patients with atherosclerotic lesions at two or more arteries/segments, mirror patterns were observed in 312 patients (61.3%). The mirror pattern increased steeply as the number of atherosclerotic arteries increased and was most frequently found in the carotid bulb (C1, 26.7%), followed by the middle cerebral artery (M1, 14.1%). The severity of stenosis was also correlated between left and right sides, and the correlation was highest in the C1 (<I>r</I> = 0.40, <I>P </I>< 0.001). Multiple logistic regression analyses revealed that the mirror patterns of atherosclerosis were more obvious in C1 and associated with a past history of ischaemic stroke and the number of stenotic lesions.</P><P>Conclusion: </P><P>Atherosclerosis in cerebral arteries may develop and progress in a mirror pattern. In patients with cerebral artery atherosclerosis, the occurrence and progression of atherosclerosis in the contralateral cerebral artery should be considered during follow-up examination.</P>

플랜지가 있는 제품에서 부분패드의 영향에 관한 연구

고관영,허주환,문정효,장재석,김동윤,정민섭,김주찬,박기용,이강연,조명우,이권진,조영호,이효걸,김주호,이경희 울산과학대학 2000 연구논문집 Vol.27 No.1

본 논문에서는 기존의 Motion-JPEG 기반 감시시스템에서 낮은 동영상 압축성능 문제를 해결하기 위한 새로운 동영상 압축기법을 제안하였다. 제안된 방법에서는 현재 프레임의 JPEG 데이터 중 변화된 압축 데이터만이 실시간으로 추출하고 저장된다. 제안된 방법에 의해 저장된 데이터는 기존의 JPEG과는 다른 고유의 포맷을 가지기 때문에, 동영상 데이터는 더욱 안전하게 유지될 수 있다. 실험을 통해, 제안된 동영상 압축기법의 압축률이 기존의 Motion-JPEG 기반 감시시스템에 비해 3배정도 높다는 것을 확인할 수 있었다.

자유드로잉 제품과 패드를 설치한 드로잉 제품의 특성

고관영,명노훈,하종성,이창수,최창권,최병용,허기영,김광수,김동수,장종훈,장윤철,김세환,오정민,하민정,박향자 울산과학대학 2000 연구논문집 Vol.27 No.1

본 연구는 자체 제작한 전체 패드가 부착된 드로잉 금형을 이용하여 SUS, 연강, AI, 6:4황동 판재를 드로잉 가공하여 생산된 제품의 특성을 자유드로잉 하여 얻은 제품의 특성과 비교 분석하였다. SUS 판재의 경우 제품에 발생하는 현상은 벽 주름, 구변주름, 수직 파단, 드로잉상처, 이어링이 발생하였으며 길이변화는 펀치어깨부분에서 가장 많이 늘어남을 볼 수 있었고 벽 주름 부분에 있어서 접혀진 부분은 상대적으로 적게 늘어남을 볼 수 있었다. 연강 판재는 SUS 판재에서 보여준 현상을 나타내었으나 SUS 판재에 비해 수직 파단은 적게 일어난 반면 이어링이 더 크게 일어났다. AI 판재의 경우 수직 파단은 일어나지 않았으나 플랜지 주름과 밑면터짐이 발생하였다. 6:4황동의 경우는 전체패드의 AI 판재 드로잉에서와 같이 밑면터짐과 플랜지 주름의 발생이 일어났다.

F-free Y & Cu 전구용액 적용에 의한 YBCO coated conductors의 MOD 공정 개선

김영국,유재무,정국채,고재웅,조윤숙,허은옥,Kim, Y.K.,Yoo, J.M.,Chung, K.C.,Ko, J.W.,Cho, Y.S.,Heo, E.O. 한국초전도학회 2006 Progress in superconductivity Vol.8 No.1

Total Fluorine content in the precursor solution for MOD processing of YBCO coated conductors can be significantly reduced by synthesizing precursor solution with F-free Y & Cu precursor and Barium trifluoroacetate(TFA). It was shown that crack-free and uniform precursor films were formed after calcinations in humidified oxygen atmosphere. Less than 2 hours are required to finish the calcination process, and XRD measurement shows that $BaF_2,\;CuO,\;and\;Y_2O_3$ are major constituent of calcined precursor films. Film thickness after calcination was measured to be ${\sim}2.8$ um by applying slot-die coating method. In particular, addition of Samarium shows critical current of Ic=226 A/cm-w($Jc=3.4\;MA/cm^2$). Also discussed are recent developments in the reel-to-reel processing using F-free Y & Cu precursor solutions. It is shown that uniform and fast processing route to YBCO coated conductor with high Ic can be provided by employing F-free Y & Cu precursor solutions in MOD process.

50μm급 마이크로렌즈 적용 2인치 휴대폰 LCD-BLU 금형 개발 : 광학패턴의 세장비 영향

김종선,고영배,민인기,유재원,허영무,윤경환,황철진,Kim, J.S.,Ko, Y.B.,Min, I.K.,Yu, J.W.,Heo, Y.M.,Yoon, K.H.,Hwang, C.J. 한국소성가공학회 2007 소성가공 : 한국소성가공학회지 Vol.16 No.1

LCD-BLU(Liquid Crystal Display - Back Light Unit) consists of several optical sheets: LGP(Light Guiding Plate), light source and mold frame. The LGP of LCD-BLU is usually manufactured by etching process and forming numerous dots with $50{\mu}m$ in diameter on the surface. But the surface roughness of LGP with etched dots is very high, so there is much loss of light. In order to overcome the limit of current etched dot patterned LGP, optical pattern design with microlens of $50{\mu}m$ diameter was applied in the present study. The microlens pattern fabricated by modified LiGA with thermal reflow process was applied to the optical design of LGP and optical simulation was carried out to know tendency of microlens patterned LGP simultaneously. The attention was paid to the effects of different aspect ratio(i.e. $0.2\sim0.5$) of optical pattern conditions to the brightness distribution of BLU with microlens patterned LGP. Finally, high aspect ratio microlens patterned LGP showed superior results to the one made by low aspect ratio in average luminance.

대학생의 취침 전 스마트폰 사용과 수면의 질 간의 관계

김보민,김지은,김희진,문소연,문재민,송지원,양다경,이서연,정유담,허혜빈,배성희 이화여자대학교간호학회 2020 이화간호학회지 Vol.- No.54

Purpose: This study's main objectives are to examine the relationship of smartphone use at bedtime and sleep quality among college students. Methods: A sample 189 Korean college students(20-26 years old( participated in a survey about smartphone use in bed time and sleep quality. Self-reported sleep quality, daytime fatigue and insomnia were measured using the Pittsburgh Sleep Quality Index Korean version (PSQI-K). There are 3 sections of the questionnaire; 1) general information 2) sleep quality using PSQI-K 3) smartphone usage before bedtime. Data was analyzed using cross tabulation, one-way ANOVA, and independent T-Test. Results: 1. There was a difference whether they suffer from daily life due to the use of smartphones before bedtime between college student‘s sex and majors. 2. There was a difference in the main purpose of using smartphone before bedtime by age. 3. Respondents who used their smartphones before bedtime everyday showed prolonged sleep latency than those who used smartphones before bedtime less frequently. 4. There was no significant difference in the quality of sleep according to usage time and recognition on smartphone usage before bedtime and its disturbance of daily life. 5. The quality of sleep according to the purpose of smartphone usage before bedtime showed no significant difference. Conclusion: Based on the study results, there is the necessity of self-management among college students to enhance their sleep quality. Additionally, further research on the smartphone usage before bedtime is necessary due to the absence of the precedent studies and gender imbalance in the collected data.

Biomarker analysis in stage III–IV (M0) gastric cancer patients who received curative surgery followed by adjuvant 5-fluorouracil and cisplatin chemotherapy: epidermal growth factor receptor ( <i>EGFR</i> ) associated with favourable survival

Kim, J-S,Kim, M-A,Kim, T M,Lee, S-H,Kim, D-W,Im, S-A,Kim, T-Y,Kim, W H,Yang, H-K,Heo, D S,Bang, Y-J,Lee, K-U,Choe, K-J,Kim, N K Nature Publishing Group 2009 The British journal of cancer Vol.100 No.5

<P>The aim of this study was to analyse the impact of epidermal growth factor receptor (<I>EGFR</I>), thymidylate synthase (<I>TS</I>), dihydropyrimidine dehydrogenase (<I>DPD</I>), thymidine phosphorylase (<I>TP</I>), aurora kinase (ARK) A/B, and excision repair cross-complementing gene 1 (<I>ERCC1</I>) on the efficacy of adjuvant chemotherapy with 5-fluorouracil and cisplatin (FP) after curative gastric resection. Normal and cancer tissue were separately obtained from gastrectomy samples of 153 patients with AJCC stage III–IV (M0) who subsequently treated with adjuvant FP chemotherapy. <I>TS</I>, <I>DPD</I>, <I>TP</I>, <I>ERCC1</I>, and ARK proteins were measured by immunohistochemistry (IHC). <I>EGFR</I> expression was investigated using a standardized IHC with the <I>EGFR</I> PharmDx assay. Amplification of <I>EGFR</I> gene was analysed using fluorescent <I>in situ</I> hybridisation (FISH). In multivariate analysis, stage, ratio of positive to removed lymph nodes, and <I>EGFR</I> expression were significant prognostic factors for overall survival. Patients with higher <I>EGFR</I> expression had better overall survival than those with lower expression (relative risk: 0.475 (95% confidence interval, 0.282–0.791, <I>P</I>=0.005). Low <I>EGFR</I> expression might be a predictive marker for relapse in curative resected stage III–IV (M0) gastric cancer patients who received adjuvant FP chemotherapy.</P>

Ag가 첨가된 Fe계 초미세결정립 박막의 자기적 특성

허정섭,민복기,김현식,송재성,오영우 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

본 연구에서는 MHz영역에서 사용가능한 Fe계 연자성 재료를 비정질과 초미세 결정립이 혼재되어 있는 복합상을 가진 합금을 제조하기 위해 Fe-Zr-B계 조성에 Fe와 비고용원소인 Ag를 첨가시킨 Fe□□Zr□B□Ag□ 박막을 DC 마그네트론 스퍼터링법으로 제조하였다. 그리고 다양한 온도에서 1시간동안 열처리한 후 fan을 이용하여 냉각한 후 자기적 특성 및 미세구조의 변화를 열처리 온도에 따라 조사하였다. Fe□□Zr□Ag□박막의 경우 500℃에서 1시간 열처리하였을 때, 보자력은 1.1 Oe, 포화자화는 2.2 T, 투자율은 주파수 50 ㎒대역에서 5400으로 우수한 연자기특성을 나타냈다. Fe□□Zr□B□Ag□ 박막의 손실은 1 ㎒에서 0.7 W/cc로 매우 낮은 값은 가지며, 이는 초미세결정립의 형성으로 인한 투자율의 증가와 Ag 첨가에 의한 자구 미세화로 인해 와전류 손실이 감소하였기 때문이라 생각되며, 고주파 영역에서 우수한 연자기 특성을 나타내었다. The magnetic properties of sputtered Fe□□Zr□B□Ag□ amorphous thin films, which contains an additional insoluble element Ag, have been investigated as a function of non field annealing temperature in order to know its potential application as a core materials of thin film magnetic devices at MHz. The amorphous Fe□□Zr□B□Ag□ thin fims produced by relatively low temperature annealing at 500℃ for 1 hour was found to have high initial permeability of 5400 at 50 MHz, 0.2 mOe, low coercivity of 1.1 Oe and very low core loss of 0.7 W/cc at 1 MHz, 0.1 T, respectively. It is notable that the permeability and core loss values for various kinds of the soft magnetic thin films reported up to now. The reason for the appearance for the good soft magnetic properties is presumably due to the homogeneous formation of very fine bcc α-Fe clusters with the size of 8 nm in the amorphous Fe□□Zr□B□Ag□ thin films matrix, which can be deduced from the XRD results.

20대 성인의 페이스북 이용행태에 따른 사회비교 경향성, 우울,자아존중감

김지원,남궁빈,안해정,권햇살,한예슬,허진성,김고은,김수진,김미혜,이수인 이화여자대학교 간호과학대학 2015 이화간호학회지 Vol.- No.49

Purpose: The purpose of this study was to explore the differences among social comparison orientation, depression, and self-esteem by patterns of using Facebook among Facebook users’ in their 20s. Methods: The participants in this descriptive study were 332 Facebook users in their 20s. Data collection took place between August 21 and 27, 2014. Questionnaires were the Iowa–Netherlands Comparison Orientation Measure (revised), Center for Epidemiologic Studies Depression Scale, and Rosenberg Self-Esteem Scale. Data were statistically analyzed using t-tests and ANOVAs. Result: Each mean score of social comparison, depression, and self-esteem was 26.04±6.82, 31.39±8.99 and 38.05±6.19. Significant differences emerged between the degree of social comparison and the following Facebook usage variables: average single-connection time to Facebook (F=3.570, p=.007) and self-evaluation of Facebook usage behavior (F=6.203, p<.001). Conclusion: The results of this study suggested that Facebook users in their 20s who access Facebook for long periods and assess themselves as using it more often had a high score of comparison orientation. This result can be used in Nursing by developing the theoretical basis for education and campaign related to Facebook usage. In-depth studies are needed for research on the effect social comparison has on Facebook users and relationships between social comparison and emotions.