• 보건교육건강증진학회지
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• 제29권3호
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• pp.103-114
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• 2012

Objectives: The purpose of this study was to investigate the relationship between mental health status, stress, coping ability, and coping strategies of college students. Methods: The questionnaires were handed out to 162 college students in the Gyeonggi province. Data was collected using the Symptom Checklist-90-Revised (SCL-90-R) scale of the 90 items, the 'Person in the Rain' drawing test, and the 20-item coping strategies questions. Results: 17.3% of the respondents were belonged to the groups of abnormal or abnormal tendency in the mental health status according to the Global Severity Index (GSI) scores. The clinical/border groups were more commonly used in the 'emotion-focused' coping strategies compared to the normal group. This difference was also statistically significant. Both coping resource and coping ability were significantly associated with the mental health status. Conclusions: These findings suggest that future intervention for effective coping strategies should be carefully designed to promote better mental health among college students. It is also important to detect problematic and weak student's behaviors in the early stages.

• 한국직업건강간호학회지
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• 제24권2호
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• pp.57-66
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• 2015

Purpose: The purpose of this study was to identify correlations among emotional labor, servant leadership, and communication competence in hospital nurses. Methods: A self-administrated survey was conducted with a convenient sample of 210 nurses, using a structured questionnaire. The data were analyzed by descriptive statistics, t-test, ANOVA, and Pearson's correlation coefficient using SPSS/WIN 20.0 program. Results: The mean emotional labor score was $3.4{\pm}0.60$. There was very strong and negative correlation between emotional labor and servant leadership (r=-.896, p<.001). Communication competence was positively correlated with servant leadership (r=.298, p<.001) and moderately and negatively correlated with both frequency of emotional labor (r=-.166, p=.016) and the degree of attention to emotional expression (r=-.143, p=.039). Conclusion: As a strategy to reduce emotional labor of hospital nurses, the findings suggest training programs for nurses to enhance servant leadership and communication competence.

• 대한수의학회지
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• 제32권3호
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• pp.389-398
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• 1992

Molecular cloning was carried out on the Danish strain of bovine viral diarrhea virus(BVDV) to construct strategy for the diagnostic tools and effective vaccine of BVD afterwards. A recombinant DNA clone(No. 29) was established successfully from cDNA for viral RNA tailed with adenine homopolymer at 3'-end. $^{32}P$-labeled DNA probes of 300~1,800bp fragments, originating from the clone 29, directed specific DNA-RNA hybridization results with BVDV RNA. Recombinant DNA of the clone 29 was about 5,200bp representing 41.6% of the full length of Danish strain's RNA, and restriction sites were recognized for EcoR I, Sst I, Hin d III and Pst I restriction enzymes in the DNA fragment.

• 항공우주시스템공학회지
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• 제17권4호
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• pp.58-66
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• 2023

최근 글로벌 이슈는 우주경제 및 저궤도 우주통신이다. 3GPP의 2022년 Release 17 표준화에 따라 미국은 2023년 3월, 국가 차원의 저궤도 5G-NTN 우주산업 경쟁력 제고와 생태계 조성 전략을 마련하였다. 글로벌 스마트폰 반도체 제조사들은 표준기반 칩(Chip) 기술의 개발 및 검증 결과를 발표하고, 위성통신 사업자들은 지상통신망 간의 융합으로 저궤도 5G-NTN 우주통신 서비스 및 요금상품을 출시하고 있다. 본 연구는 한국의 저궤도 5G-NTN 우주통신 생태계 현황을 진단한다. 그리고 우리의 생태계 조성 전략을 시장의 공정경쟁, 서비스 법제도, 국가 R&D 거버넌스 체계 측면에서 제시한다.

• The Journal of Advanced Prosthodontics
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• 제12권5호
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• pp.291-298
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• 2020

PURPOSE. The aim of this study is to evaluate the influence of repeated surface treatments on wettability and surface roughness for zirconia surface and bond strength of zirconia-based ceramics to resin cement. MATERIALS AND METHODS. Seventy blocks (10 × 10 × 3 mm) of zirconia-based ceramics were fabricated and divided into two groups according to the surface treatments: (A) 110 ㎛ Al₂O₃ airborne-particle abrasion and (R) 110 ㎛ silica modified Al₂O₃ airborne-particle abrasion. At stage 2, each group was subdivided into 5 groups according to the surface retreatments: (a) 110 ㎛ Al₂O₃ airborne-particle abrasion, (r) 110 ㎛ silica modified Al₂O₃ airborne-particle abrasion, (D) diamond bur, (Da) diamond bur + 110 ㎛ Al₂O₃ airborne-particle abrasion, and (Dr) diamond bur + 110 ㎛ silica modified Al₂O₃ airborne-particle abrasion. Cylinders of self-adhesive resin cement were cemented onto each treated ceramic surface and subjected to micro-shear bond strength test. Additional specimens were prepared for roughness and wettability analyses. The data were subjected to t-test and One-way ANOVA followed by Tukey's post hoc test (α=.05). RESULTS. At stage 1, group R presented higher bond strength values than group A (P=.000). There was a statistically significant increase of bond strength at stage 2 for group A (P=.003). The diamond bur influenced the surface roughness, increasing the values (P=.023). Group R provided better wettability. Regardless of the applied surface treatment, most of failures were adhesive. CONCLUSION. The combination of application and reapplication of Rocatec Plus showed the best results of bond strength. Surface retreatment and recementation might be an indicated clinical strategy.

• 산업융합연구
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• 제18권4호
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• pp.33-40
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• 2020

본 연구는 정신약물을 복용하는 정신질환자의 진정, 섬망 및 낙상의 관계를 파악하기 위한 서술적 조사 연구이다. 2019년 3월10일부터 2019년 11월10까지 D시에 위치한 정신병원 2곳을 대상으로 정신과 간호사 4인이 정신질환자 총 149명에 대한 평가를 실시하였다. 수집된 자료는 SPSS 22.0를 이용하여 서술적 통계, t-test, ANOVA, Pearson's correlation coefficient로 분석하였다. 정신질환자의 진정과 섬망(r=.587 p=<.001), 진정과 낙상(r=.273 p=.001), 섬망과 낙상(r=.390 p=<.001)은 모두 유의한 양의 상관관계로 나타났다. 이에 본 연구는 정신약물을 복용하는 정신질환자의 진정, 낙상, 섬망의 정도를 파악하고 진정과 낙상 및 섬망간의 관계를 확인함으로써 정신약물 복용시 발생할 수 있는 낙상과 섬망을 예방하고 간호중재 전략을 마련하는 기초자료를 제공할 수 있을 것으로 생각된다.

• 마케팅과학연구
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• 제17권3호
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• pp.39-59
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• 2007

기업 환경의 국제화에 따라 설립초기에 국제화를 시도하는 벤처 기업이 증가하고 있고 이러한 현상은 기존의 기업 국제화의 단계적인 모델로는 설명에 한계를 가진다. 소위 태생적 글로벌 벤처(born global venture; BGV)은 R&D 밀집도와 경쟁밀집도가 높은 하이테크 산업에서 많이 나타나며 기존의 실증 연구에서 BGV의 환경 및 기업의 역량 특성과 국제화에 따른 기업 성과에 대한 연구가 진행되어 왔다. 그러나 기업의 성과의 경우 실증적인 연구에서 상호 다른 결과를 보이고 있으며 기업의 성과에 중요한 영향을 미치는 마케팅 전략에 대한 논의가 부족했다고 판단된다. 이에 본 연구에서는 BGV에 포함되지 않는 기업(Non_BGV)에 비하여 BGV가 보유하고 있는 기업 역량과 마케팅 전략의 차이 및 BGV의 기업 성과를 성장성, 수익성, 시장 성과 측면에서 분석해 보았다. 결과적으로 BGV는 Non_BGV에 비하여 기업의 지식을 활용하는 능력 및 해외 경험에서 차이를 보였으며 두 기업군이 추구하는 마케팅 전략에서도 차이가 있음을 보였다. 또한 기업의 성과 측면에서는 성장성과 시장 성과에서는 BGV가 더 나은 성과를 보였으나 수익성 측면에서는 차이가 없는 것으로 분석되었다.

• Journal of Korean Neurosurgical Society
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• 제62권2호
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• pp.153-165
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• 2019

Objective : Spinal cord injury (SCI) is a very serious health problem, usually caused by a trauma and accompanied by elevated levels of inflammation indicators. Stem cell-based therapy is promising some valuable strategies for its functional recovery. Nestin-positive progenitor and/or stem cells (SC) isolated from pancreatic islets (PI) show mesenchymal stem cell (MSC) characteristics. For this reason, we aimed to analyze the effects of rat pancreatic islet derived stem cell (rPI-SC) delivery on functional recovery, as well as the levels of inflammation factors following SCI. Methods : rPI-SCs were isolated, cultured and their MSC characteristics were determined through flow cytometry and immunofluorescence analysis. The experimental rat population was divided into three groups : 1) laminectomy & trauma, 2) laminectomy & trauma & phosphate-buffered saline (PBS), and 3) laminectomy+trauma+SCs. Green fluorescent protein (GFP) labelled rPI-SCs were transplanted into the injured rat spinal cord. Their motilities were evaluated with Basso, Beattie and Bresnahan (BBB) Score. After 4-weeks, spinal cord sections were analyzed for GFP labeled SCs and stained for vimentin, $S100{\beta}$, brain derived neurotrophic factor (BDNF), 2',3'-cyclic-nucleotide 3'-phosphodiesterase (CNPase), vascular endothelial growth factor (VEGF) and proinflammatory (interleukin [IL]-6, transforming growth factor $[TGF]-{\beta}$, macrophage inflammatory protein [MIP]-2, myeloperoxidase [MPO]) and anti-inflammatory (IL-1 receptor antagonis) factors. Results : rPI-SCs were revealed to display MSC characteristics and express neural and glial cell markers including BDNF, glial fibrillary acidic protein (GFAP), fibronectin, microtubule associated protein-2a,b (MAP2a,b), ${\beta}3$-tubulin and nestin as well as anti-inflammatory prostaglandin E2 receptor, EP3. The BBB scores showed significant motor recovery in group 3. GFP-labelled cells were localized on the injury site. In addition, decreased proinflammatory factor levels and increased intensity of anti-inflammatory factors were determined. Conclusion : Transplantation of PI-SCs might be an effective strategy to improve functional recovery following spinal cord trauma.

• 대한화학회지
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• 제58권6호
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• pp.649-657
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• 2014

과학 글쓰기가 학생들의 문제해결력 향상에 영향을 주는지 알기 위해서 과학글쓰기 수업 모형(REWS 모형)을 개발하였다. REWS 모형은 네 단계로 이루어져 있으며 R단계는 읽기를 통해 과학적 문제를 인식하는 단계이며 E단계는 문제를 탐색하는 단계, W단계는 글쓰기를 통해 과학적 이해를 증명하는 단계이고 S단계는 통합적 문제해결 단계이다. 135명의 고등학교 1학년 학생들을 실험반과 비교반으로 나누고 실험반은 REWS 모형으로 수업을 하였고 비교반은 강의식 수업을 실시하였다. 수업은 34차시동안 진행하였다. 연구 결과를 보면 실험반과 비교반의 문제해결에 필요한 비판적 사고력 점수 차이가 통계적으로 유의미하였다(p<.05). 즉 과학 글쓰기를 강조한 수업 전략은 학생들의 문제해결력에 긍정적인 영향을 준다는 것을 알 수 있다.

• International Journal of Automotive Technology
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• 제7권3호
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• pp.377-383
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• 2006

This paper presents evaluation and comparisons of manual driving and driving with intelligent cruise control(ICC) systems. An intelligent vehicle cruise control strategy has been designed to achieve natural vehicle behavior of the controlled vehicle that would make human driver feel comfortable and therefore would increase driver acceptance. The evaluation and comparisons of the ICC and manual driving have been conducted using real-world vehicle driving data and an ICC vehicle simulator.