• Title/Summary/Keyword: SURVIVAL STRATEGY

검색결과 517건 처리시간 0.023초

융합기업의 기업가정신이 학습지향성에 미치는 영향 (The Entrepreneurship of Convergence Companies Affect Learning Orientation)

  • 최승일;김동일
    • 디지털융복합연구
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    • 제15권4호
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    • pp.243-250
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    • 2017
  • 2008년 글로벌 금융위기 이후 세계 각국은 생존하기 위한 필수전략으로 창업 및 기업가 정신의 활성화를 강조하고 있다. 선진국의 사례를 살펴보면 우선 미국, 유럽연합, 중국 등이 창업 및 기업가정신 활성화를 적극적으로 추진하고 있으며 이는 큰 성과로 나타나고 있다. 한편 우리나라의 경우 기업의 성장이 정체되고 그 해결책으로 기업내 또는 기업간 융합을 통한 경쟁력 강화에 힘쓰면서 기업가정신의 중요성은 더욱 강조되고 있는 실정이다. 따라서 본 연구에서는 우리나라기업의 경쟁력 제고를 위하여 기업가정신과 학습지향성간의 영향관계를 살펴보고 이를 기반으로 한 융합기업의 성장을 위한 경영전략의 기초가 되고자 하였다. 본 연구의 진행을 위해서는 융합기업을 대상으로 하였으며, 설문지조사를 통하여 통계프로그램을 통하여 가설을 검증하였다. 연구결과 첫째, 혁신성은 학습지향성에 영향을 미치는 것으로 나타났다. 둘째, 진취성은 학습지향성에 영향을 미치는 것으로 나타났다. 마지막으로 위험감수성은 학습지향성에 영향을 미치지 않는 것으로 나타났다.

The analysis of cost-effectiveness of implant and conventional fixed dental prosthesis

  • Chun, June Sang;Har, Alix;Lim, Hyun-Pil;Lim, Hoi-Jeong
    • The Journal of Advanced Prosthodontics
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    • 제8권1호
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    • pp.53-61
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    • 2016
  • PURPOSE. This study conducted an analysis of cost-effectiveness of the implant and conventional fixed dental prosthesis (CFDP) from a single treatment perspective. MATERIALS AND METHODS. The Markov model for cost-effectiveness analysis of the implant and CFDP was carried out over maximum 50 years. The probabilistic sensitivity analysis was performed by the 10,000 Monte-Carlo simulations, and cost-effectiveness acceptability curves (CEAC) were also presented. The results from meta-analysis studies were used to determine the survival rates and complication rates of the implant and CFDP. Data regarding the cost of each treatment method were collected from University Dental Hospital and Statistics Korea for 2013. Using the results of the patient satisfaction survey study, quality-adjusted prosthesis year (QAPY) of the implant and CFDP strategy was evaluated with annual discount rate. RESULTS. When only the direct cost was considered, implants were more cost-effective when the willingness to pay (WTP) was more than 10,000 won at $10^{th}$ year after the treatment, and more cost-effective regardless of the WTP from $20^{th}$ year after the prosthodontic treatment. When the indirect cost was added to the direct cost, implants were more cost-effective only when the WTP was more than 75,000 won at the $10^{th}$ year after the prosthodontic treatment, more than 35,000 won at the $20^{th}$ year after prosthodontic treatment. CONCLUSION. The CFDP was more cost-effective unless the WTP was more than 75,000 won at the $10^{th}$ year after prosthodontic treatment. But the cost-effectivenss tendency changed from CFDP to implant as time passed.

Overexpression of microRNA-612 Restrains the Growth, Invasion, and Tumorigenesis of Melanoma Cells by Targeting Espin

  • Zhu, Ying;Zhang, Hao-liang;Wang, Qi-ying;Chen, Min-jing;Liu, Lin-bo
    • Molecules and Cells
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    • 제41권2호
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    • pp.119-126
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    • 2018
  • microRNA (miR)-612 shows anticancer activity in several types of cancers, yet its function in melanoma is still unclear. This study was undertaken to investigate the expression of miR-612 and its biological relevance in melanoma cell growth, invasion, and tumorigenesis. The expression and prognostic significance of miR-612 in melanoma were examined. The effects of miR-612 overexpression on cell proliferation, colony formation, tumorigenesis, and invasion were determined. Rescue experiments were conducted to identify the functional target gene(s) of miR-612. miR-612 was significantly downregulated in melanoma tissues compared to adjacent normal tissues. Low miR-612 expression was significantly associated with melanoma thickness, lymph node metastasis, and shorter overall, and disease-free survival of patients. Overexpression of miR-612 significantly decreased cell proliferation, colony formation, and invasion of SK-MEL-28 and A375 melanoma cells. In vivo tumorigenic studies confirmed that miR-612 overexpression retarded the growth of A375 xenograft tumors, which was coupled with a decline in the percentage of Ki-67-positive proliferating cells. Mechanistically, miR-612 targeted Espin in melanoma cells. Overexpression of Espin counteracted the suppressive effects of miR-612 on melanoma cell proliferation, invasion, and tumorigenesis. A significant inverse correlation (r = -0.376, P = 0.018) was observed between miR-612 and Espin protein expression in melanoma tissues. In addition, overexpression of miR-612 and knockdown of Espin significantly increased the sensitivity of melanoma cells to doxorubicin. Collectively, miR-612 suppresses the aggressive phenotype of melanoma cells through downregulation of Espin. Delivery of miR-612 may represent a novel therapeutic strategy against melanoma.

바람길을 활용한 국가중요지역 안전대책 강구에 관한 연구 (Study on security measures for protecting major national facilities using the wind corridor)

  • 최기남
    • 융합보안논문지
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    • 제11권5호
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    • pp.109-120
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    • 2011
  • 기상상황은 고금을 통해 인간의 생활이나 병법의 중요한 요소로 생존전략의 핵심적 역할을 해왔다. 현대 도시의 과밀집중현상은 여러 가지 문제를 야기하고 있으며, 고층화와 토지피복의 변화는 기상의 이상 현상을 일으키는 작용을 하고, 특히 도심지역의 바람길은 주변의 지배적인 기상여건과 다른 흐름이 나타나고 있다. 따라서 바람길은 도심지역에 위치한 국가 중요시설 등에 대한 위기관리를 위한 방어계획에 중요한 고려 요인이 될 수 있다. 특히 대기 중에 유출된 유독물질의 유해성은 비람길이 핵심적인 변인이 된다. 본 논문은 도심지역의 바람길의 산출과 이를 통한 국가 중요시설 및 지역에 대한 위기관리에 유용성을 논의하고, 방어계획의 수립에 활용하기 위한 방안을 도출하고자 하였다. 이는 화생방테러리즘이나 폭력적 집회 시위에 대한 방어계획의 수립, 대형 사고나 자연재난 시 주민대피계획의 수립에 유용할 것으로 사료된다.

Some Aspects of Laying, Incubation and Hatching in the Great Reed-Warbler

  • Yoo, Jeong-Chil;Choi, Yu-Seong
    • The Korean Journal of Ecology
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    • 제25권4호
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    • pp.241-245
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    • 2002
  • During the breeding season of 1998, breeding ecology of the Great Reed-Warbler (Acrocephalus arundinaceus orientalis) was studied at Yangsoo-ri and Yongdam-ri of the Yangpyung-gun, Kyunggi province, Korea. Egg-weight (CV: 6.25) was more variable than either length or breadth, and breadth was the least variable of the measures. Significant variations in overall egg-weight occurred between clutches, and that more of the total variation in egg-weight and shape are due to inter-clutch variation as to intra-clutch variation when the data were pooled. The last egg tends to be larger than the remaining eggs in the clutch of the Great Reed-Warbler, suggesting the Great Reed-Warbler may adopt the brood-survival strategy. When method 3 was used, the most common incubation period is 12 days. In the Great Reed-Warbler, the length of the incubation period was related to clutch-size when method 1 (r=0.485, p<0.05) and method 2 (r=0.621, p<0.01) were employed, but not related to egg weight. The averagee number of days of hatching asynchrony was 2.5, raging 0.5~2.5. Asynchronous hatching was related to the clutch size (r=0.66, p<0.01). Hatching sequence was closely related to the laying sequence (r=0.93, p<0.001), suggesting Great Reed-Warblers incubate their eggs before clutch completion. The effect of egg weight on hatching asynchrony was found in Great Reed-Warblers (t-test, p<0.01).

PBIL을 이용한 소형 스테레오 정합 및 대안 알고리즘 (A Simple Stereo Matching Algorithm using PBIL and its Alternative)

  • 한규필
    • 정보처리학회논문지B
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    • 제12B권4호
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    • pp.429-436
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    • 2005
  • 본 논문에서는 유전자 알고리즘의 일반적인 문제점인 과도한 저장공간의 소모와 탐색의 비효율성을 줄이기 위해 PBIL을 이용한 단순한 스테레오 정합 기법을 제안한다. PBIL은 확률벡터에 기반해서 통계적 탐색과 경쟁학습을 이용하는 변종 유전자 알고리즘이며 확률벡터의 사용으로 인해 직렬 및 병렬 유전자 알고리즘군에 비해 단순한 구조를 가진다. 본 논문에서는 이 PBIL을 스테레오 정합 환경에 맞게 변형 및 단순화시켜 정합 알고리즘을 개발한다. 높은 적응성을 갖는 염색체는 생존 확률 또한 높다는 진화 법칙을 보존하면서 유전자 풀, 염색체 교차 및 유전자 돌연변이를 제거할 수 있으며 그 결과 저장공간을 줄이고 정합 규칙을 간소화하여 계산 비용을 감소시킬 수 있다. 추가적으로 다해상도 정합 기법처럼 넓은 영역의 변이 일관성을 획득하기 위해 변이 연속성에 대한 이웃들의 거리를 제어하는 방식을 추가하여 고정된 작은 정합창을 사용하면서 안정된 결과를 얻을 수 있게 한다. 마지막으로 단순한 시스템에 적용될 수 있게 하기 위해서 확률벡터를 사용하지 않는 제안한 알고리즘의 소형 대안 기법을 제시한다.

DCS mesh 네트워크에서 다중 선로 장애와 노드 장애를 복구하기 위한 다중 계층 복구 전략 (Multi-layer restoration strategy to restore the multi-link and node failures in DCS mesh networks)

  • 김호진;조규섭;이원문
    • 한국통신학회논문지
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    • 제22권12호
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    • pp.2744-2754
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    • 1997
  • 회선분배시스템(DCS: Digital Cross-connet System)을 이용한 mesh 구조의 동기식 전송망에서 망의 장애를 효과적으로 복구하기 위한 망 복구 방식 중 최근에 제안된 다중 계층 복구(MLR: Multi-Layer Restoration) 방식은 선계획(Pre-planned) 복구 방식과 다이나믹(Dynamic) 복구 방식을 단계별로 구성하여 보다 효율적인 망복구를 수행하기 위한 망 복구 전략으로 B.T(British Telecom)에서 제안되었다[1,2]. 이 망 복구 전략은 단일 선로 장애에 대해 효율적인 성능을 발휘할 수 있으나, 다중 선로 장애와 노드 장애의 경우 선계획 복구 단계에서 복구되지 못하고 다이나믹 복구 단계에서 복구됨으로 인해서 선계획 복구의 장점을 최대한 활용하지 못하여 복구 성능 감쇠를 초래한다. 본 논문에서는 기존의 다중 계층 복구 방식에서 사용되는 선계획 복구 단계에 선계획 Multi-chooser 복구 단계를 추가한 새로운 다중 계충 복구 방식을 제안하였으며, 이 방식은 다중 선로와 노드 장애에 대하여 빠른 복구 시간과 높은 복구율을 갖고 있다. 또한, 제안한 복구 알고리즘을 모델링하여 OPNET(OPtimized Network Enginnering Tool)을 이용한 시뮬레이션을 통해 이의 성능을 분석, 검증하였다.

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Autogenous fat grafting for mild-to-moderate postoperative temporal hollowing after decompressive craniectomy: One-year follow-up

  • Choi, Jaemin;Choi, Hyungon;Shin, Donghyeok;Kim, Jeenam;Lee, Myungchul;Kim, Soonheum;Jo, Dongin;Kim, Cheolkeun
    • Archives of Plastic Surgery
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    • 제45권1호
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    • pp.69-73
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    • 2018
  • Background Temporal hollowing is inevitable after decompressive craniectomy. This complication affects self-perception and quality of life, and various techniques and materials have therefore been used to restore patients' confidence. Autologous fat grafting in postoperative scar tissue has been considered challenging because of the hostile tissue environment. However, in this study, we demonstrate that autologous fat grafting can be a simple and safe treatment of choice, even for postoperative depressed temporal scar tissue. Methods Autologous fat grafting was performed in 13 patients from 2011 to 2016. Fat was harvested according to Coleman's strategy, using a tumescent technique. Patient-reported outcomes were collected preoperatively and at 1-month and 1-year follow-ups. Photographs were taken at each visit. Results The thighs were the donor site in all cases for the first procedure. The median final volume of harvested fat was 29.4 mL (interquartile range [IQR], 24.0-32.8 mL). The median final volume of fat transferred into the temporal area was 4.9 mL on the right side (IQR, 2.5-7.1 mL) and 4.6 mL on the left side (IQR, 3.7-5.9 mL). There were no major complications. The patient-reported outcomes showed significantly improved self-perceptions at 1 month and at 1 year. Conclusions Despite concerns about the survival of grafted fat in scar tissue, we advise autologous fat grafting for patients with temporal hollowing resulting from a previous craniectomy.

Prognostic Significance of Claudin 4 in Completely Resected Adenocarcinoma of the Lung

  • Chae, Min Cheol;Park, Chang Kwon;Keum, Dong Yoon;Hwang, Ilseon;Kwon, Kun Young;Jang, Byeong Churl
    • Journal of Chest Surgery
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    • 제47권3호
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    • pp.262-268
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    • 2014
  • Background: The development of diagnostic techniques and an awareness of health examinations can bring about an early diagnosis of lung cancer. However, appropriate postoperative management and adjuvant chemotherapy remain under debate in postoperative therapeutic strategy. The present study was conducted to assess the clinicopathologic factors that influence recurrence and prognosis after complete resection of lung cancer. Methods: The present study analyzed 62 patients with lung cancer who underwent complete resection of diagnosed adenocarcinoma between 1994 and 2007. In addition to conventional factors, which include staging factor and histological evaluation, the present study also performed univariate and multivariate analyses to consider claudin, a cell adhesion molecule, as a prognostic factor by immunohistochemical staining. Results: There was no correlation between conventional factors, including lymphatic and vascular invasion, and recurrence. However, there was a significant correlation between high expression of claudin 4 and cancer recurrence. In particular, there was a correlation between high expressions of claudin 1, 4, and 5 and a reduction of disease-free survival. Conclusion: Increased expressions of claudin 4 were negative prognostic factors in adenocarcinoma of the lung and thus could be used to identify high-risk patients for adjuvant chemotherapy, even if they had early-stage lung cancer. The present findings collectively suggest that consideration of claudin as a prognostic factor in the active postoperative treatment in patients at high risk will lead to better therapeutic outcomes with fewer side effects.

배나무잎검은점병 무독수의 선발 및 품종 저항성 (Selection of Pear Trees Free from Pear Black Leaf Spot Disease and Resistant Test for Pear Tree Cultivars)

  • 오중환;남기웅;미쯔타니 푸사오
    • 원예과학기술지
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    • 제19권1호
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    • pp.43-47
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    • 2001
  • 배나무잎검은점병에 대한 종합방제 대책을 수립하고자 시험을 수행하였다. 배 생산단지로부터 무독모수를 선발하기 위해서 본 병에 대한 감염 여부를 검정한 결과, 배나무잎검은점병이 발생하지 않는 6주를 확인하였다. 본 바이러스는 $40/32^{\circ}C$에서 3주간, $37/30^{\circ}C$에서 4주간 변온처리에 의해서 무독화가 가능하였으나 신초의 활착률이 매우 낮았다. 본 바이러스를 접종하여 병징이 발현하는 품종은 신고 등 7품종이었고, 발현하지 않는 품종은 수황배등 11종이었다. 품질이 우수한 저항성 품종인 수황배를 배나무잎검은점병이 발생하고 있는 신고 배나무에 고접한 결과 배나무잎검은점병이 전혀 발생하지 않았다.

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