• Asia pacific journal of information systems
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• 제20권4호
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• pp.25-51
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• 2010

This study compares and contrasts the intellectual development of the MIS field in Korea from 2005 to 2009 to that of international trends by using a keyword co-occurrence network analysis of the two flagship journals: APJIS and MIS Quarterly. From 316 research articles in these two journals, 132 unique and most frequently co-occurred keywords were put into analysis. The results of structural equivalence show a mild correlation between APJIS and MIS Quarterly. The e-commerce, trust, and technology adoption are the high frequency keywords in both journals. In Korea e-learning, purchasing, and recommendation systems turn out to be important keywords while outsourcing, research method, quantitative method, design research, information theory, and empirical research are in average international journals. This connotes that the Korean scholarship tends to focus more on practically oriented topics, but the clustering and relational mapping of research topics in each journal show a mild level of overlap with distinctive orientations due to intrinsic disparities depending on the concerned journals' geographical scopes, namely domestic or global.

• 지식경영연구
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• 제21권4호
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• pp.129-156
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• 2020

공유경제가 디지털 서비스 플랫폼을 기반으로 한 새로운 경제체계로 인식되고 있지만, 국내에서는 사회적인 인식과 이해의 부족으로 공유경제가 아직 자리잡지 못하고 있다. 해외 경제 선진국과 같이 새로운 비즈니스를 창출하고, 이를 통해 신규 시장을 개척하기 위해 공유경제를 긍정적 관점에서 바라보고 이해할 필요성이 있다. 이에 본 연구에서는 전 세계 각 학문 분야에서 진행된 지난 10년간 공유경제 연구를 수집하여 학술적 관점에서 공유경제 연구의 현황을 살펴보고, 더 나아가 이 중에서 MIS 영역의 연구를 선별하여, 공유경제 내 MIS 영역 연구의 동향도 분석해 보았다. 본 연구를 통해 공유경제와 MIS 연구의 연구 흐름을 확인하였고, 공유경제에서의 MIS 연구 중요도와 연관성을 살펴봄으로써 두 연구 간 학제적 연구의 필요성도 도출하였다. 따라서 다양한 학문적 접점을 가진 공유경제가 인접 학문의 활발한 연구를 독려하고, 더 나아가 사회, 경제, 산업적으로 보다 긍정적으로 한국에 자리매김하는데 본 연구가 기여할 수 있기를 기대한다.

• 한국통신학회논문지
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• 제35권12C호
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• pp.971-976
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• 2010

본 논문은 홀로그래픽 저장장치를 위한 오류 정정 4/6 변조 부호에 대해서 알아보고, 어긋남이 존재하는 상황에서 성능을 알아보았다. 홀로그래픽 저장장치는 2차원 인접 심볼간 간섭이 생기는 채널로, 읽기 성능을 높이기 위해 변조 부호를 사용해야 한다. 이러한 변조 부호에 길쌈 구조가 더해지면 오류 정정 능력을 가지게 된다. 오류 정정 4/6 변조 부호는 기존의 변조 부호보다 성능이 우수하였고, 어긋남에 대해서도 강인한 성능을 보여준다.

• 한국인터넷방송통신학회논문지
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• 제14권5호
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• pp.263-269
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• 2014

본 논문은 지금까지 미해결 문제로 알려진 정점 색칠 문제에 대한 Hadwiger 추측의 반증을 제시하였다. Hadwiger 추측은 "모든 $K_k$-minor free 그래프는 k-1개의 색으로 칠할 수 있다. 즉, $K_k$-마이너를 얻으면 ${\chi}(G)=k$이다." Hadwiger 추측을 적용하여 정점 색칠을 할 경우, 먼저 NP-완전 (NP-complete)인 $K_k$-마이너를 구하여 ${\chi}(G)=k$를 결정하고, 다시 NP-완전인 정점 색칠 문제를 풀어야 한다. Hadwiger 추측을 반증하기 위해 본 논문은 정점 색칠의 정확한 해를 O(V)의 선형시간으로 구하는 알고리즘을 제시하였다. 제안된 알고리즘은 그래프의 최소 차수를 가진 정점을 최대독립집합 (MIS)으로 하고, MIS 정점의 인접 정점 간선을 삭제한 축소된 그래프에 대해 이 과정을 반복하면서 하나의 색을 가진 MIS를 얻는다. 다음으로 MIS 정점의 간선을 삭제한 축소된 그래프에 대해 동일한 과정을 수행하여 MIS의 개수가 정점 채색수 ${\chi}(G)=k$가 되는 해를 얻는다. 제안된 알고리즘을 적용하여 NP-완전 문제인 완전 색칠 (total coloring) 채색수 ${\chi}^{{\prime}{\prime}}(G)$의 해를 구하는 알고리즘을 제안하였다. 제안된 알고리즘을 $K_4$-마이너 그래프에 적용한 결과 ${\chi}(G)=4$가 아닌 ${\chi}(G)=3$을 얻었다. 결국, Hadwiger 추측은 모든 그래프에 대해 적용되지 않음을 알 수 있다. 제안된 알고리즘은 마이너를 구하지 않으며, 주어진 그래프에 대해 직접 ${\chi}(G)=k$인 독립집합 마이너를 구하여 각 독립집합 정점들에 동일한 색을 배정하는 단순한 방법이다.

• Journal of Gastric Cancer
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• 제24권2호
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• pp.210-219
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• 2024

Purpose: The study aimed to investigate real-world surgical outcomes of minimally invasive surgery (MIS) for advanced gastric cancer using Korean Gastric Cancer Association (KGCA)-led nationwide data. Materials and Methods: A nationwide survey of patients who underwent surgical treatment for gastric cancer in 2019 was conducted by the KGCA. A total of 14,076 patients from 68 institutions underwent surgery, and 4,953 patients diagnosed with pathological stages IB-III gastric cancer were included. Among them, 1,689 patients who underwent MIS (MIS group) and 1,689 who underwent the open approach (open group) were matched using propensity score in a 1:1 ratio. Surgical outcomes were compared, and multivariate analysis was performed to identify the independent factors for overall morbidity. Results: The MIS group had a lower proportion of D2 lymphadenectomy, total omentectomy, and combined resection. However, the number of harvested lymph nodes was higher in the MIS group. Better surgical outcomes, including less blood loss and shorter hospital stay, were observed in the MIS group, and the overall morbidity rate was significantly lower in the MIS group (17.5% vs. 21.9%, P=0.001). The mortality rates did not differ significantly between the 2 groups. In the multivariate analysis, the minimally invasive approach was a significant protective factor against overall morbidity (odds ratio, 0.799; P=0.006). Conclusions: Based on the Korean nationwide data, MIS for stage IB-III gastric cancer had better short-term outcomes than the open approach, including lower rates of wound complications, intra-abdominal abscesses, and cardiac problems.

• 한국지형학회지
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• 제24권4호
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• pp.43-55
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• 2017

This study tries to examine papers on coastal terrace in the East Coast of South Korea and to summarize formative age and elevation of the terrace. Spatial and temporal variations of uplift rate in the Coast based on absolute age published are also reviewed. The terrace in the middle part in the Coast from Goseong to Samcheok distributes in an elevation of 10-20 m and its formative age is MIS 5a. The terraces during MIS 5e and 7 develop on an elevation of 20-35 m and 60-80 m, respectively. The mid-southern part in the Coast from Uljin to Yeongil Bay has the terraces with elevations of 10-25 m and 25-45 m and their ages are MIS 5a or 5c and 5e, respectively. The terraces with elevations of 10-25 m and 30-45 m correspond to MIS 5a and 5e, respectively, in the southern part in the Coast from Homigot to Busan. Assuming that elevation of sea level during the formation of each terrace is the same as in the present time, uplift rates in the Coast range from 0.05 to 1.36 m/ky with an average of approximately 0.33 m/ky. The highest and lowest rates since MIS 5 are found in the Gyeongju (approximately 0.39 m/ky) and Pohang (approximately 0.19 m/ky) areas. With a consideration of elevation of sea level at that time, however, the middle, midsouthern and southern parts in the Coast show uplift rates of 0.16-0.28 m/ky, 0.20-0.36 m/ky and 0.24- 0.36 m/ky since MIS 5, respectively, suggesting that the southern part in the Coast has experienced relatively higher uplift rate.

• 경영과정보연구
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• 제3권
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• pp.399-417
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• 1999

The purpose of this paper id to study the factors influencing MIS user satisfaction. For this purpose. I have reviewed the results of past studies on the performance factor of MIS, and introduced a new model associated with small & Medium Business. On the basis of this model, I have hypothesized that the following variables influence user satisfaction : (gender, age), individual characteristics(user attitude, training for user), managerial characteristic(top management involvement, organizational support) and task characteristics(task structure). There were 195 participants surveyed using questionnaires from 25 different small & medium Business in Pusan. The research model and associated hypotheses were tested by following statistical techniques: reliability test, regression, t-test and ANOVA. The findings of this study are follows; 1. It was found that gender and age are not correlated user satisfaction. 2. Among individual characteristics, only user attitude influence user satisfaction significantly. 3. While organizational supports influence positively user satisfaction, top management involvement do not influence it. 4. Task structure is highly correlated with user satisfaction. In spite of many factors affecting MIS success, this study did not consider all variables affect on user satisfaction. We need integrated model including more various factors.

• 대한치과교정학회지
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• 제46권2호
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• pp.111-126
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• 2016

Objective: To systematically review previous studies and to assess, via a subgroup meta-analysis, the combined odds ratio (OR) of prognostic factors affecting the success of miniscrew implants (MIs) inserted into the buccal posterior region. Methods: Three electronic searches that were limited to articles on clinical human studies using MIs that were published in English prior to March 2015 were conducted. The outcome measure was the success of MIs. Patient factors included age, sex, and jaw of insertion (maxilla vs. mandible), while the MI factors included length and diameter. A meta-analysis was performed on 17 individual studies. The quality of each study was assessed for non-randomized studies and quantified using the Newcastle-Ottawa Scale. The meta-analysis outcome was a combined OR. Subgroup and sensitivity analyses based on the study design, study quality, and sample size of miniscrews implanted were performed. Results: Significantly higher success rates were revealed for MIs inserted in the maxilla, for patients ${\geq}20$ years of age, and for long MIs (${\geq}8mm$) and MIs with a large diameter (> 1.4 mm). All subgroups acquired homogeneity, and the combined OR of the prospective studies (OR, 3.67; 95% confidence interval [CI], 2.10-6.44) was significantly higher in the maxilla than that in the retrospective studies (OR, 2.10; 95% CI, 1.60-2.74). Conclusions: When a treatment plan is made, these risk factors, i.e. jaw of insertion, age, MI length, and MI diameter, should be taken into account, while sex is not critical to the success of MIs.

• 한국항만경제학회지
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• 제29권2호
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• pp.211-238
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• 2013

본 연구는 2010년 4월부터 웹기반의 새로운 플랫폼으로 서비스되고 있는 WEB Port-MIS의 서비스 품질 측정에 대한 연구는 전무하여 처음으로 WEB Port-MIS 서비스 품질 평가에 관한 연구를 하는 것에 의의가 있다. 설문 문항은 공공기관 웹사이트 평가지표를 기초로 개발하였고 요인분석을 통해 품질측정척도를 개발하였다. 개발된 측정 척도를 바탕으로 AHP 분석을 실시하여 항목별 중요도를 평가하였고 설문조사와 AHP 분석을 통해 도출된 결과를 바탕으로 중요도-성과분석법을 활용하여 서비스 품질 관리 전략을 수립하였다. 중요도 만족도 분석결과 WEB Port-MIS의 세부항목 별로 가장 중요하게 평가 된 컨텐츠(정보의 다양성, 유용성)항목에 대한 개선이 필요하며 행정정보의 제공 및 운영 항목도 컨텐츠 항목과 함께 집중 개선 영역에 위치하여 개선활동이 필요하다. 이를 위해 최신 기술을 활용하여 최적의 민원서비스를 구축하는 것이 필요하며 실시간 정보제공 체계, 민원처리시스템의 다양화, 최적의 민원서비스를 제공하기 위한 대안 마련이 필요하다. 특히 컨텐츠 항목의 개선을 위해서는 주를 이루는 항만민원신고 서비스에 대해 향후에는 웹기반 민원처리의 고도화, 관련 기관 간 정보 공동 활용 확대, 이용자 중심의 신고절차 간소화 구현을 단계적으로 추진하여 해운항만물류정보의 글로벌 통합정보서비스의 역할이 되도록 고려하여야 한다.

• Clinical and Experimental Pediatrics
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• 제65권4호
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• pp.153-166
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• 2022

During the coronavirus disease 2019 (COVID-19) pandemic, a novel multisystem inflammatory syndrome in children (MIS-C) has been reported worldwide since the first cases were reported in Europe in April 2020. MIS-C is temporally associated with severe acute respiratory syndrome coronavirus 2 infection and shows Kawasaki disease (KD)-like features. The epidemiological and clinical characteristics in COVID-19, KD, and MIS-C differ, but severe cases of each disease share similar clinical and laboratory findings such as a protracted clinical course, multiorgan involvement, and similar activated biomarkers. These findings suggest that a common control system of the host may act against severe disease insult. To solve the enigmas, we proposed the protein-homeostasis-system hypothesis in that every disease involves etiological substances and the host's immune system controls them by their size and biochemical properties. Also, it is proposed that the etiological agents of KD and MIS-C might be certain strains in the microbiota of human species and etiological substances in severe COVID-19, KD, and MIS-C originate from pathogen-infected cells. Since disease severity depends on the amounts of inflammation-inducing substances and corresponding immune activation in the early stage of the disease, an early proper dose of corticosteroids and/or intravenous immunoglobulin (IVIG) may help reduce morbidity and possibly mortality among patients with these diseases. Corticosteroids are low cost and an analogue of host-origin cortisol among immune modulators. This study's findings will help clinicians treating severe COVID-19, KD, and MIS-C, especially in developing countries, where IVIG and biologics supplies are insufficient.