In this study, a drifting test using a experimental vessel (2,966 tons) in the northern waters of Jeju was carried out for the first time in order to obtain the fundamental data for drift. During the test, it was shown that the average leeway speed and direction by GPS position were 0.362 m/s and 155.54° respectively and the leeway rate for wind speed was 8.80%. The analysis of linear regression modes about leeway speed and direction of the experimental vessel indicated that wind or current (i.e. explanatory variable) had a greater influence upon response variable (e.g. leeway speed or direction) with the speed of the wind and current rather than their directions. On the other hand, the result of multiple regression model analysis was able to predict that the direction was negative, and it was demonstrated that predicted values of leeway speed and direction using an experimental vessel is to be more influential by current than wind while the leeway speed through variance and covariance was positive. In terms of the leeway direction of the experimental vessel, the same result of the leeway speed appeared except for a possibility of the existence of multi-collinearity. Then, it can be interpreted that the explanatory variables were less descriptive in the predicted values of the leeway direction. As a result, the prediction of leeway speed and direction can be demonstrated as following equations. However, many drift tests using actual vessels and various drifting objects will provide reasonable estimations, so that they can help search and rescue fishing gears as well.

Marine accidents caused by ships are very diverse, such as collision, sinking, stranding, grounding and fire. In particular, persons on passenger ship are unspecified and not trained, so it makes evacuation harder. For this reason, an evacuation plan that considers diverse situation in ship is needed. Effective evacuation planning requires training in consideration of various evacuation situations. In this paper, we investigated the time elapsed on evacuation in various situations from “HANMIR,” the fishery training ship of the Korean Institute of Maritime and Fisheries Technology, using a Ship Evacuation Analysis Program (SEA-Pro) which is introduced to the society. We assumed a situation that has not only inconveniences for real training but also the possibilities of happening. Not all trainees are resting in their cabin, so we assumed positions such as they are in the bridge or engine room and applied fire and flooding situations. We assumed that the time for alerting the situation would be short, so we applied only elapsed time of movement. Those analyses could be helpful in three ways. The first is predicting the consequence of possible accidents. There are some conditions that can be appliable to this model, such as the decreased area of sight in those situations. The second is concluding the optimal limit of carriage and placement of safety instruments on building a new ship. The third is to be a base data for ships to make a new effective evacuation plan based on these analyses.

본 연구에서는 국내 시판되고 있는 진피차 10종을 무작위로 구매하여 외관 및 기본 정보와, 각 티백을 80oC의 열수 100 mL에서 5분간 침출한 용액의 당도, pH, 적정 산도, 환원당 함량, Vitamin C 함량, 총 폴리페놀 함량, 총 플라보노이드 함량을 분석하였다. 진피차 10종은 모두 100% 진피를 사용했으며 첨가물이 들어있지 않았다. 당도와 산도는 진피를 많이 함유한 T10에서 가장 높게 나타났으며 동일한 제조사 제품의 경우 외관상 입자크기가 큰 제품에서 당도값이 높게 나타났다. pH는 일정한 경향이 나타나지 않았으며 이는 원료 및 제조공정의 차이로 인한 것으로 생각된다. 환원당 함량과 Vitamic C 함량은 진피 함유량이 증가할수록 함량이 높아지는 경향을 나타냈다. 총 폴리페놀 함량은 8.69-33.42 mg GAE/100 mL의 범위에서 진피 함유량이 높을수록 총 폴리페놀 함량이 높게 나타났다. 총 플라보노이드 함량은 T10에서 가장 높은 값을 보였고, T1이 가장 낮은 값을 나타냈으며 총 폴리페놀 함량 결과와 유사한 경향 을 보였다. 본 연구에서 진피차는 중량, 입자크기에 따라 이화학 특성이 달라진다는 것을 확인하였으며 이외에도 원료나 제조공정에 따른 차이가 있을 것으로 판단된다. 이를 바탕으로 진피차의 품질향상 및 신제품 개발 시기초정보로 활용하는 데 도움이 될 것으로 생각된다. 본 연구는 시판 진피차를 시료로 이용했기 때문에 명시된 정보 이외에 품질 특성에 관여하는 건조방법, 귤 품종, 재배지역에 관한 정보는 알 수 없었다. 따라서 이러한 조건에 따른 진피차의 품질특성에 관한 추가적인 연구가 필요할 것으로 생각된다.

구조물을 지진 위험으로부터 완화시키기 위한 마찰면진장치의 상용화된 마찰재료 중 폴리테트라플루오로에틸렌(polytetrafluoroethylene, PTFE)은 내화학성과 마찰성능이 우수하다. 그러나 PTFE는 상대적으로 낮은 내마모성을 가지므로 경제적인 마찰재료이며 산화마그네슘(oxide magnesium, MgO)으로 내마모성을 증가시킨 개선된 폴리비닐리덴 플루오라이드(polyvinylidene fluoride, PVDF)를 PTFE 의 대안으로 제안하였다. 개발된 PVDF/MgO 마찰재를 이용하여 실험을 통해 마찰성능을 측정하였으며 PTFE의 마찰성능과 비교하였다. 그리고 측정된 마찰계수를 이용하여 마찰면진장치를 설계하였다. 마찰면진장치의 성능은 교량의 비선형 시간이력 해석을 통해 확인하였고, 이를 통해 마찰면진장치의 마찰재료로 PTFE를 대체하여 PVDF/MgO를 사용하는 것에 대한 타당성을 평가하였다.

The research was analyzed the catch data of the five years (2016-2020) for six joint venture company tuna purse seiners in the Atlantic Ocean, with the aim of suggesting improvement measures for responsible and sustainable fishing according to changes of recommendation by International Commission for the Conservation of Atlantic Tuna (ICCAT) on the tropical tunas. In the last five years, the average catch of six tuna purse seiner gradually increased to 7,745 tons, 8,364 tons and 9,053 tons from 2016 to 2018, but decreased to 7,761 tons in 2019 and 6,214 tons in 2020. The reason for the decrease in fishing volume in 2019 and 2020 was the fluctuation of the formation of the cold water zone (22-23℃), and the total ICCAT convention area of FAD closure in January and February due to the expansion of the FAD closure area and poor free school catching during two months period, respectively. The analysis on fishing area showed that the percentage of fishing in the high sea was about 85% although the FAD closure area included the EEZ zone in coastal countries; the rise of the fishing license in coastal countries is also believed to be a factor. In order to overcome such situations and improve catching volume, it will be possible if excellent manpower is secured, school fishing is expanded, and the production of high value-added catch (purse seine special: PS).

본 연구의 목적은 북한이 2016년 5월 3일 유엔여성차별철폐위원회에 제출한 유엔여성 차별철폐협약 2·3·4차 국가이행보고서를 놓고, 동 보고서의 보건 인프라 조항을 분석·평가 하는 것이다. 이에 따라 본 연구의 주요 분석대상은 북한이 공식적으로 유엔에 제출한 ① 북한의 여성차별철폐협약 2·3·4차 국가이행보고서, ② 유엔여성차별철폐위원회가 추가로 요청한 쟁점, ③ 이에 대한 북한의 추가 답변서, ④ 유엔여성차별철폐위원회의 최종 견해를 표명한 보고서에 나타난 보건 인프라 부문 조항들이다. 또한 본 연구의 연구방법은 문헌조사기법에서 주로 활용하는 질적 연구방법을 분석기제로 사용하고자 한다. 분석결과, 첫째, 북한의 국가 이행보고서상의 보건 인프라의 경우 보고 내용은 일부 정량적인 보고가 있지만 다수가 정성적인 내용 중심의 보고이다. 이는 기존의 보고 행태와 거의 동일한 패턴이다. 둘째, 유엔여성차별철폐위원회의 추가 쟁점은 협약 이행 점검의 필수 사안인 여성 보건 현실에 대한 자료를 요청하였다. 무엇보다 이러한 유엔여성차별철폐위원회의 추가 요청은 본 보고서의 미진한 보고 행태에 기인한다. 셋째, 북한의 추가 쟁점에 대한 답변서의 경우 내용적으로 접근하면 일부 누락된 보고와 추상적 수준의 초점을 벗어난 답변 이 주류를 이루고 있다. 이러한 보고 행태는 북한의 심각한 오류이고 결과적으로 이는 사실 상의 북한 스스로 마지막 소명 기회를 놓친 셈이다. 넷째, 유엔여성차별철폐위원회의 최종 견해의 경우 보건 인프라에 대한 지적과 경고보다는 보건 현실에 대한 문제제기이다. 즉, 유엔여성차별철폐위원회는 심의와 평가에 전제되는 문제를 제기하였는데, 이는 북한이 당면한 해결과제이자 여성 보건의 선결과제이다.

농업의 지속가능성을 확보하기 위해서 농업인들의 직업에 대한 만족은 필수조건이다. 본 연구의 목적은 농업인의 직업만족도에 영향을 미치는 요인을 제시하는데 있다. 분석을 위해 경상북도농업기술원에서 2016년부터 2018년까지 실시한 생산자 패널 농업경영성과와 농촌생활만족도 설문조사 자료를 활용하였다. 분석모형은 자료의 특성을 고려하여 패널 순위 프로빗 모형을 이용하였다. 분석결과 농업인의 직업만족도에 영향을 미치는 요인은 농업소득, 가격경쟁력, 정책만족도, 영농기술만족도 등으로 나타났다. 농업소득이 높을수록, 가격경쟁력, 정책만족도, 영농기술만족도가 높을 수록 농업인의 직업만족도가 높아지는 것으로 분석되었다. 본 연구의 분석결과는 농업인 직업만족도 제고 방안 수립에 기초자료로 활용될 것으로 기대된다.

이 연구의 목적은 「산림총서」 및 언론보도, 북한과학기술네트워크(http://www.nktech.net/) 등의 문헌자료를 이용하여 1960년부터 2019년까지 북한 산불의 시공간적 발생경향과 산불 분야 연구동향을 파악하는 것이다. 북한의 산불 발생이력은 2000년대를 기점으로 대외적으로 보고되기 시작하였으며, 산불 보도건수는 산림율과 정의 상관관계를, 인구밀도 및 산림황폐화율과는 부의 상관관계를 보였다. 시기적으로는 봄과 가을, 지역적으로는 동해안 지역에 산불이 집중되는 경향을 보였다. 동해안 지역에 산불 발생이 집중되는 이유는 높은 산림율과 낮은 인구밀도로 인해 감시와 통제에 자유로운 방화가 북한지역 산불의 주원인이 될 수 있음을 시사하였다. 산불 관련 논문은 2000년대를 기점으로 다수 발행되었으며, 김정은 집권시기에 가장 많은 논문이 발행되었다. 연도별 논문 발행편수는 산불 보도건수(n-3년 및 n-5년 이동평균)와 정의 상관관계를 보였으며, 산불 발생빈도가 증가함에 따라 산불이 사회적 문제로 확대되면서 관련 연구가 수행되었던 것으로 확인할 수 있었다. 이 연구의 결과는 향후 산불 분야의 남북 교류협력에 있어 산불 공동 관리·대응 역량 및 상호 협력체계를 발전시킬 수 있는 기초정보를 제공할 수 있을 것으로 기대된다.

Purpose: The purpose of this study was to clarify the definition of ‘death attitude’ reflecting the passage of time and socio-cultural context through conceptual analysis . Method: The concept of ‘death attitude’ was analyzed using a hybrid model to clarify the concept's properties and definition. For theoretical analysis, literature published from 2016 to 2021 was searched and a total of 33 articles including 25 domestic and 8 foreign studies were analysed. For a field study, seven adults were interviewed in May-June, 2021. Result: The domain of ‘death attitude’ concept were deduced into positive, neutral, and negative domains. At the field research stage, 'how to relieve the burden on those left behind' under the 'escape' attribute, 'no time to think about death' under the 'avoidance' attribute, and 'anxiety about unexpected death' under the 'anxiety' attribute were newly discovered. Conclusions: ‘Death attitude’ is a positive, neutral, or negative attitude toward death according to multuple characteristics such as demographics, spiritual well-being, direct or indirect experiences of death, or death-related educational experiences. Death attitude affects quality of life, meaning of life, and end-of-life care. It is important for nurses to be aware of their own death attitudes in order to provide quality end-of-life care to patients and their families.

We have analyzed 42 research papers regarding on the solar astronomy written by North Korea scientists to investigate the current status of astronomical activities in North Korea. The papers are surveyed from the ‘Bulletin of Astronomy’, the ‘Physics’, the ‘Bulletin of Academy of Science’, and the ‘Natural Science’ in North Korea, and SCI journals. In addition, we refer to the presentation material announced in the 2015 IAU by director of Pyongyang Astronomical Observatory (PAO) and the 2013 OAD/IAU reports. We have analyzed the papers statistically according to three criteria such as research subject, research field, and research members. The main research subjects are the sunspot (28%), observation system (21%), and space environments (19%). The research fields are distributed with data analysis (50%), numerical method (29%), and instrument development (21%). There have been 25 and 9 researchers in the solar astronomy and space environment, respectively since 1995. North Korea’s solar research activities were also investigated in three area: instrument, solar physics, and international research linkage. PAO has operated two of sunspot telescope and solar horizontal telescope for spectroscopy and polarimetry, but there is no specific information on solar radio telescopes. North Korea has cooperated in solar research with Europe and China. We expect that the results of this study will be used as useful resource in supporting astronomical cooperation between South and North Korea in the future.

본 연구는 기술혁신형 중소기업의 연구개발 활동 효율성을 산업 간 비교하여 개선방안을 제시한다. 연구표본은 2008년부터 2011년까지 기술보증기금의 기술평가보증을 받은 6,708개 기업이다. 투입변수는 기술인력수준과 연구개발투자, 산출변수는 특허출원과 시제품제작실적이다. 효율성은 DEA 모형으로 측정하며, 산업별 개별측정하는 간접비교를 수행한다. 그 결과로 최적의 규모수익을 판단하는 기술효율성(CCR)은 0.19, 최적의 투입분배 를 판단하는 순수기술효율성(BCC)은 0.70, 최적의 산출규모를 판단하는 규모효율성(SE)은 0.30으로 나타났다. 산업유형으로 살펴보면, 중·저급기술산업군은 규모효율성이 낮아서 연구 성과 확대가 요구되고, 고급·첨단기술산업은 순수기술효율성이 낮아서 투입요소 관리가 필요 하다. 산업 전반에 규모의 비효율이 크므로 연구성과 관리를 통한 규모의 확대가 이뤄져야 하며, 이를 위한 연구인력과 투자비의 분배가 병행되어야 효율성이 향상될 것이다. 본 연구 는 우리나라 기술혁신형 중소기업에서 연구개발의 비효율성 원인이 규모에 있다는 것을 기 술보증기금의 기술평가자료로 규명한 것이 특징이다.

Nurses in an intensive care unit (ICU) often play key roles to improve the quality of end-of-life care. During those times, many nurses report they feel ambivalent in the caring between life and death. The purpose of this study was to analyze the concept of ambivalence that ICU nurses often experienced in end-of-life care. As a method, this study was conducted with the concept analysis using the hybrid model Schwartz-Barcott and Kim (1986) presented, naming the complex and dual feelings nurses experience during end-of-life care in ICU as ambivalence. In the theoretical phase and from the literature review, characteristics of ambivalence were identified. During the fieldwork phase, in-depth interviews were conducted with five nurses. In the final phases, a theoretical description was extracted of ambivalence in ICU nurses during end-of-life care. In terms of results, external factors (i.e., realistic context, contradictions in nursing activities themselves) and internal factors (i.e., personal tendencies, conflicting perceptions of dying, occupational awareness of nurses, role conflicts) were derived as antecedents of ICU nurses’ ambivalence during end-of-life care. Attributes were divided into intrinsic and existential dimensions. Intrinsic dimensions resulted in "coexistence of opposing equivalent values," "uncertainty," "hiddenization," "value confrontation may occur sequentially," and "absence of willingness to resolve." In existential dimensions, the following conflicts were derived: "pressure on work versus sympathy about family grief," "helplessness due to failure of medical care versus sadness for patient death" and "role as a nurse versus sadness felt during end-of-life care.” The results are organized into negative assessments of oneself and adaptations to ambivalence. In conclusion, through this concept analysis, the hope is that ICU nurses will be able to prevent progressing to burnout by accurately and actively facing and managing their own feelings during end-of-life care. Furthermore, this research is expected to serve as the cornerstone of developing theories for clinicians who provide end-of-life care.

PURPOSES : In this study, an ASR-reducing (alkali-silica reaction) cement was developed to prevent the blow-up of concrete pavements. To develop ASR-reducing cement, various amounts of ground granulated blast furnace slag (GGBFS), and fly ash (FA) were substituted with Portland cement, and the ASR reduction effect was verified through various experiments. METHODS : The physical properties of ASR-reducing cement, varying with the substitution amounts of GGBFS and FA, were verified through compressive strength tests. In addition, the ASR reduction effect was examined using accelerated mortar bar tests. Furthermore, the reasons for the ASR reduction were investigated using microstructural analysis techniques, such as XRD and TG/DTG. RESULTS : There was a difference in the compressive strength results according to the amount of GGBFS and FA substitution. In addition, the samples with GGBFS and FA exhibited relatively lower compressive strengths at 3 days, than OPC samples, but the compressive strength at 28 days was higher than that of the OPC samples. The samples with GGBFS and FA had higher compressive strength at 28 days than OPC samples, because the substituted GGBFS and FA induced pozzolanic reaction. Through XRD and TG/DTG analyses, various degrees of pozzolanic reaction occurring in the samples were examined, and a more active pozzolanic reaction occurred in the samples with FA than in the samples with GGBFS. Therefore, it appeared that the ASR reduction effect occurred because of the induced pozzolanic reaction. CONCLUSIONS : GGBFS and FA substituting Portland cement indicated an ASR reduction effect, which was owing to the pozzolanic reaction. In addition, FA indicated a greater ASR reduction effect than GGBFS, which suggested that FA induced a more active pozzolanic reaction than GGBFS.

This study aimed to explore research trends of nursing ethics in Korea applying text network analysis and topic modelling. 306 articles published in KCI journals from 1998 to 2021 were identified and 516 author-provided keywords were collected. A co-occurrence matrix with 123 keywords, which appeared at least in two articles, were developed based on the Jaccard coefficient. Degree centrality and betweenness centrality were calculated and LDA topic modelling were performed using NetMiner software. The largest number of the articles (70, 23%) were published in Korean Journal of Medical Ethics. The most critical core-keywords, defined as the top 30 keywords in degree centrality and betweenness centrality, were ‘nursing students’ and ‘moral sensitivity’. The other core-keywords included ‘attitude,’ ‘awareness,’ ‘professionalism,’ ‘knowledge,’ and ‘critical thinking.’ related to ethical competence, ‘death,’ ‘hospice,’ ‘euthanasia,’ and ‘research ethics’ related to bioethical issues, and ‘job satisfaction,’ ‘burn out,’ ‘stress,’ ‘organizational culture,’ ‘ethical leadership,’ and ‘ethical climate’ related to organization and leadership. Five topics were identified and named as a) bioethics education for nursing students, b) knowledge and attitudes for bioethical issues, c) awareness and values of bioethics, d) ethical conflicts of RNs, and e) nursing ethics education. This study found that bioethics was the main topics in Korean nursing ethics research and suggested nursing research should focus on ethical issues RNs frequently experience in patient care. Also, research gaps were inferred in multiple topics including nurse-to-nurse relationships, theoretical perspectives of virtue ethics and care ethics, or witnessing healthcare professionals’ unethical behavior.

본 연구를 실시하는 목적은 자기성찰과 정신건강 간에서 나타나는 5요인 마음챙김 경로 및 간접효과유의성을 검증하고자 하는데 있다. 본 연구대상은 익산시와 평택시의 애견훈련센터에 방문하는 성인남녀 140명에게 설문조사를 한 후 표기가 불분명한 자료를 제외한 129명의 자료를 토대로 분석하였다. 분석에 사용된 측정도구로는 자기성찰, 5요인 마음챙김, 정신건강에 관한 설문지였다. 본 연구의 자료분석을 위하여 M-Plus 6.12를 활용해 분석하였다. 본 연구의 매개효과에 대한 결과분석에서 자기성찰은 5요인 마음챙김(β=.358, t=4.187, p <.001)에 유의한 정적 영향을 미치는 것으로 나타났다. 그리고 5요인 마음챙김은 정신건강(β=.264, t=2.445, p <.01) 영향을 미치는 것으로 나타났다. 더불어 간접효과유의성검증결과에서 자기성찰이 5요인 마음챙김을 경유하여 정신건강에 이르는 경로의 경우의 간접효과(β=0.123, CI[0.014 ~ 0.319])는 유의한 것으로 나타났다. 이러한 과정을 통하여 자기성찰과 정신건강과 5요인 마음챙김의 관계성 검증분석을 토대로 한 경로 및 간접효과유의성검증을 확인할 수 있었다

As interest in the sustainable fashion industry continues to increase along with climate issues, it is necessary to identify research trends in sustainable fashion and seek new development directions. Therefore, this study aims to analyze research trends on sustainable fashion. For this purpose, related papers were collected from the KCI (Korean Citation Index) and Scopus, and 340 articles were used for the study. The collected data went through data transformation, data preprocessing, topic modeling analysis, core topic derivation, and visualization through a Python algorithm. A total of eight topics were obtained from the comprehensive analysis: consumer clothing consumption behavior and environment, upcycle product development, product types by environmental approach, ESG business activities, materials and material development, process-based approach, lifestyle and consumer experience, and brand strategy. Topics were related to consumption, production, and education of sustainable fashion, respectively. KCI analysis results and Scopus analysis results derived eight topics but showed differences from the comprehensive analysis results. This study provides primary data for exploring various themes of sustainable fashion. It is significant in that the data were analyzed based on probability using a research method that excluded the subjective value of the researcher. It is recommended that follow-up studies be conducted to examine social trends.