• Journal of Electrochemical Science and Technology
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• 제11권4호
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• pp.336-345
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• 2020

Nickel-doped lanthanum cobalt oxide (LaCo_1-xNi_xO_3-δ, LCN) was investigated as an alternative anode material for solid oxide fuel cells. To improve its catalytic activity for steam methane reforming (SMR) reaction, Ni²⁺ was substituted into Co³⁺ lattice in LaCoO₃. LCN anode, synthesized using the Pechini method, reacts with yttria-stabilized zirconia (YSZ) electrolyte at high temperatures to form an electrochemically inactive phase such as La₂Zr₂O₇. To minimize the interlayer by-products, the LCN was coated via a double-tape casting method on the Ni/YSZ anode as a catalytic functional layer. By increasing the Ni doping amount, oxygen vacancies in the LCN increased and the cell performance improved. CH₄ fuel decomposed to H₂ and CO via SMR reaction in the LCN functional layer. Hence, the LCN-coated Ni/YSZ anode exhibited better cell performance than the Ni/YSZ anode under H₂ and CH₄ fuels. LCN with 12 mol% of Ni (LCN12)-modified Ni/YSZ anode showed excellent long-term stability under H₂ and CH₄ conditions.

• 한국의류학회지
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• 제20권1호
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• pp.170-182
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• 1996

The purpose of this study is to classify the upper body of women into several kind.; of somatotypes, using the method of Surgical Tape and making their shells. The subjects are 50 females 20 to 29 years-old. Fifty-one anthropometric data are measured per shell of body surface : eight somatotype factors are obtained through principal component analysis and orthogonal rotation by the method of Varimax, Somatotype of women's upper body is achieved by cluster analysis, using the standardized factor score a.: an independent variable and the FASTCLUS of SAS by Kmeans. The results are as follows : 1. The number of the factors which explain the somatotype is eight and these factors comprise 81.63 percent of total variance. Factor 1 related to the degree of fatness in the front of upper body Factor 2 related to the degree of fatness in the back of upper body Factor 3 . related to the length of the upper body Factor 4 : related to the type of the upper chest over the chest circmference line Factor 5 : related to the armhole and neck Factor 6 : related to the type of lower chest under the chest circumference line Factor 7: related to the part of the back shoulder Factor 8: related to the depth of front neck and side dart of front independently 2. Cluster analysis results in classification of upper body into five clusters. Cluster 1 : the of circumference i.: lager and that of length is longer than the average The louver part of chest is the lagest and widest among surface areas. Cluster 2 : the circumference is the smallest , the length and surface area are small. The upper and lower chest is small Cluster 3 : the length and surface area are the smallest , the circumference is average. The body line (silhouette) from chest to waist is curved slightly.

• 한국과학교육학회지
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• 제13권1호
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• pp.31-47
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• 1993

This study was intended to find the characteristics of the middle school students' thinking processes and problem spaces when they solved the physics problems. Ten ninth grade students in Chon-Buk Do, Korea were participated in this study. The researcher investigated their thinking processes in solving 5 physics problems on electric circuit. "Thinking aloud" method was used as a research method. The students' thinking processes were recorded using an audio tape recorder and transfered into protocols. The protocols were analyzed by problem solving process coding system which was developed by Lee(1987) on the basis of Larkin's problem solving process model. The results are as follows : (1) On the average 2.85 items were solved among 5 test items, and only one person could solve all of the items correctly. (2) Problems were solved in sequence of understanding the problem, planning, carrying out the plan, and evaluating steps regardless of the problem difficulty. (3) In regard to the thinking process steps, there was no difference between the good solvers and the poor ones. But in the detail performance of problem solving, the former was different from the latter in respect with using the design of general solving procedure. (4) The basic problem spaces by the item analysis were divided into two classes. One was the problem space by using Qualitative approach in problem solving, and the other was one by using Quantitative approach. As novices in physics problem solving, most of the students used the problem space by using the Quantitative approach.

• 대한간호학회지
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• 제29권6호
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• pp.1263-1272
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• 1999

This study was alone to identify the meaning and the essence of the menopause experience by means of the Colaizzi’s phenomenological method. The participants were eight women, 48-60 years old, who were experiencing perimenopause or postmenopause. They were selected using a theoretical sampling technique. Data were collected through in-depth interviews from April 6 to May 20, 1999. The interviews took from 40 to 90 minutes. Interviews were tape- recorded and analyzed using the constant comparative method. Significant statements from data were extracted. From these formulated meanings, 18 themes, 8 clusters of themes and 3 catagories were constructed. Final descriptions were found to be valid through the interviewee validation process. Essential themes of the menopausal experience which emerged were “coming of change”, “inclined to deny the in mind”, and “adapted life”. Menopause, as coming of change was the turning point in the women’s life cycle acompaning changes, in body and mind and marital life changes. Especially, the unpredictable menopausal changes were an opportunity to hide the fact of menopause and not to talk with anybody. Such a phenomenon reflected on the psychological attributes of menopausal woman such as an inclination to deny in the mind. Their experiences of menopause as adapted life were generally regarded as signalling the end of fertility and were interpreted as a natural developmental process that indicates a life transition. In conclusion, participants depicted the menopause as a natural stage in the life cycle. In order to help women have a positive life change and self accomplishment, nurses need to understand the essential themes of the menopausal experience. Thus, the importance of an open approach in eliciting the phenomena of menopause cannot be overemphasized. In conclusion, the results of this study suggest that exercise program is one of the effective interventions to improve the self-efficacy and also to lower the fatigue in the sample of female college students.

• 한국임상수의학회지
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• 제30권4호
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• pp.283-287
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• 2013

Canine skin is a highly dynamic organ that is constantly adapted to changes in its environment. It provides structural, sensory, immunologic, and physiologic functions and contributes an essential barrier function against potential environmental insults. We assessed the changes of canine skin hydration, pH, and protein contents by noninvasive method according to the frequency of application with canine commercial shampoo. Canine commercial shampoo was applied topically every other day, 5 days, and 8 days on different sites, respectively in 8 dogs. Saline-applied site was as a control. Skin hydration was increased and skin surface pH was decreased significantly in canine commercial shampoo-applied site every other day (p < 0.05). Also, skin protein concentration measured by D-squame$^{(R)}$ tape stripping method was increased significantly in canine commercial shampoo-applied site every other day (p < 0.05). There were alterations on every 5 days and 8 days, but not significantly. These results may be recognized that the frequent use of canine commercial shampoo cause abnormalities of the skin barrier function and alteration of stratum corneum integrity/cohesion. Consequently it was suggested that bathing the dog with canine commercial shampoo was appropriate every 5 or 8 days.

• 여성건강간호학회지
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• 제10권1호
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• pp.32-41
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• 2004

Purpose: The purpose of this study was to explore and describe the process of life adaptation in women with cervical cancer. Method: A grounded theory method with guided data collection and analysis was used. Fifteen women with cervical cancer who had some kind of treatment at the hospital were asked open-ended and descriptive questions with a guideline. All interviews were tape-recorded and transcribed verbatim. Result: The core category that emerged from the comparative analysis was "overcoming cancer" named as a process of life adaptation in the participants. The process of overcoming cancer evolved three stages - "admitting reality", "attempting health-care" and "continuing health-care". Depending on the paradigm model, the central phenomena of the experiences was "powerlessness". The internal factors motivating women to overcome cancer were "denial of cancer" and "desire for life". Strategies of overcoming cancer included "living as a cancer patient," "selective food eating," "steady exercising," "getting rid of stress," and "preparing for death". The intervening conditions, "supportive system," "forms of life," and "burden on family," influenced overcoming cancer. Conclusion: The results of this study could help clinical nurses to understand life adaptation in cervical cancer patients and establish efficient coping strategies in dealing with the problems they face.

• 한국초전도ㆍ저온공학회논문지
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• 제16권2호
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• pp.42-46
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• 2014

In this study we investigated ac transport current losses in the face to face stack for the anti-parallel current flow, and compared the electromagnetic properties with those of the single SC tape as well as those of the same stack for the parallel current path. The gap between the SC tapes in the stack varied in order to verify the electromagnetic influence of the neighbors when current flows in opposite direction, and the model was implemented in the finite element method program by the commercial software, COMSOL Multiphysics 4.2a. Conclusively speaking, the loss was remarkably decreased for the anti-parallel current case, which is attributed the magnetic flux compensation between the SC layers due to the opposite direction of the current flows. As the gap between SC tapes was increased, the loss mitigation became less effective. Besides, the current density distribution is very flat cross the sample width for the narrower gap case, which is believed to be benefit for the power electric system. These results are all in good agreement with those predicted theoretically for an infinite bifilar stack.

• Nuclear Engineering and Technology
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• 제54권7호
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• pp.2592-2598
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• 2022

Research groups in the field of PET instrumentation are studying time-of-flight(TOF) technology to improve the signal-to-noise ratio of PET images. Scintillation light transport and collection plays an important role in improving the coincidence resolving time(CRT) of PET detector based on a pixelated crystal array. Four crystal arrays were designed by the different optical reflection configuration such as external reflectors and surface treatment on the CRT and compared with the light output, energy resolution and CRT. The design proposed in the study was composed of 8 × 8 LYSO crystal array consisted of 3 × 3 × 15 mm³ pixels. The entrance side was roughened while the other five surfaces were polished. Four sides of all crystal pixels were wrapped with ESR-film, and the entrance surface was covered by Teflon-tape. The design provided an excellent timing resolution of 210 ps and improved the CRT by 16% compared to the conventional method using a polishing treatment and ESR-film. This study provided a method for improving the light output and CRT of a pixelated scintillation crystal-based brain TOF PET detector. The proposed configuration might be an attractive detector design for TOF brain PET requiring fast timing performance with high cost-effectiveness.

• 한국재난정보학회 논문집
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• 제20권1호
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• pp.213-221
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• 2024

연구목적: 유해화학물질인 염산수용액 운송 탱크로리 누출사고 발생 시 신속하게 누출을 차단하고, 효과적으로 방재작업을 진행하여 누출로 인한 피해를 최소화하는 최적의 방안을 찾고자 하는 데 있다. 연구방법: 염산에 대한 전반적인 특성과 운송 도중 발생했었던 사고사례를 사고 유형별, 원인별로 정리하고, 염산 탱크로리의 누출 상황을 가정하여 실험할 수 있는 소형 탱크를 만들어 누출 상황과 비슷한 환경을 구성하여 여러 가지 방법으로 누출 차단 방법을 실험하여 정리하고자 한다. 연구결과: 실험을 통하여 효과적인 누출 차단 방법을 확인하였다. 누출사고 발생 시 신속하게 차단하는 방안을 정리하여, 사고현장에서 적용할 수 있는 최적의 방재방안을 제시하고자 한다. 결론: 누출 차단은 접착테이프와 자석을 조합하여 사용하는 편이 차단에 효과적인 것으로 확인됐다. 사업장 비상 출동팀 및 제품 운송기사들에게 누출 차단 장비를 적절하게 선택하여 대응하도록 반복 훈련하면 신속한 대응이 가능하다. 향후 다양한 누출 차단 방안에 관한 추가적인 연구의 진행이 필요하다.

• 디지털정책학회지
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• 제3권1호
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• pp.21-25
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• 2024

본 연구는 엉치엉덩관절의 불안정성에 초점을 맞춘 테이핑 방법이 요통에 도움이 될 수 있는 잠재 중재 방법인지에 대해 고려해 보고자 한 사례연구이다. 해당 사례는 58세 과거 디스크탈출증 및 협착증으로 인해 허리 수술 병력이 있는 남성이 지속적인 통증 감소를 위해 참여한 테이핑 교육 세션에서 나타난 주목할 만한 결과를 사례로 정리하였다. 중재 방법으로 테잎을 엉치뼈 2~4사이에 가시결절로부터 양쪽으로 80%< 장력으로 늘려 엉치엉덩관절을 지나게 붙이고 이후 끝 쪽은 양쪽 약 45° 방향으로 올려 중간볼기근(gluteus medius m.) 쪽으로 향하게 붙였다. 그 다음 엉덩뼈능선(iliac crest)로부터 척추기립근을 따라 10번째 갈비뼈 수준까지 이르는 양쪽 테이핑 방법이 적용되었다. 해당 중재를 통해 VAS와 ODI 두 검사도구로부터 VAS는 5에서 0, 장애지수는 13에서 0으로 각각 기록되는 긍정적 사례 결과를 관찰할 수 있었다.