• 대한한방내과학회지
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• 제38권6호
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• pp.1000-1006
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• 2017

Objectives: Head symptoms, such as headache and dizziness, are commonly presented in clinical practice. Although Donguibogam, the representative book of Korean medicine, contains many prescriptions for head symptoms, they are difficult to learn and apply because of the vast numbers. The aim of this study was to simplify and visualize the vast contents of Donguibogam by network analysis. Methods: 127 prescriptions for head symptoms, found in Donguibogam, were entered into a Microsoft office Excel 2013 file. This was used as a database for network analysis using the NetMiner 4 program. Results: Through network analysis, six networks for prescriptions for head symptoms in Donguibogam were established. The first network is similar to the herb composition of Cheongsangsahwa-tang (prescriptions for hwa-yeol syndrome). The second network is similar to the herb composition of Yanghyulgupung-tang (prescriptions for hyul-heo syndrome). The third network is similar to the herb composition of Sangcheongbaekbuja-hwan (prescriptions for dam-eum syndrome). The fourth network is similar to the herb composition of Heukseok-dan (prescriptions for yang-heo syndrome). The fifth network is similar to the herb composition of Boheo-eum (prescriptions for chil-jeong syndrome). The sixth network is similar to the herb composition of Bangpungtongseong-san (prescriptions for hwa-yeol syndrome). Conclusions: The results of the network analysis of 127 prescriptions for head symptoms in Donguibogam suggest that there are five major causes of head symptoms (hwa-yeol, hyul-heo, dam-eum, yang-heo, and chil-jeong), and that it is possible to prescribe Cheongsangsahwa-tang, Bangpungtongseong-san, Yanghyulgupung-tang, Sangcheongbaekbuja-hwan, Heukseok-dan, or Boheo-eum depending on the major causes.

• 대한한방내과학회지
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• 제44권1호
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• pp.35-52
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• 2023

Objective: Internal injuries and consumptive disease have different causes, yet they can affect each other. The relationship and combination of prescription drugs in the clinical practice of internal injuries and consumptive disease were analyzed for various diseases of "Donguibogam" through network analysis. Methods: The prescriptions used in consumptive disease and internal injury were established by conducting a full survey on the papers extracted from Donguibogam. The R version 4.0.3 (2020-10-10) and the igraph and arules package were used to perform network analysis and association rule relationship mining analysis in the first and second prescription compositions. Results: The herb frequently used for internal injury was Glycyrrhizae Radix, while the herb combination frequently used was Citri Pericarpium-Glycyrrhizae Radix. For centrality, the main factor was generally Glycyrrhizae Radix. In the case of consumptive disease, the herb most frequently used was Angelicae Gigantis Radix, and the combination most frequently used was Rehmanniae Radix Preparata-Angelicae Gigantis Radix. In terms of centrality, it was Angelicae Gigantis Radix. As a result of the network analysis of herbal prescription frequency, each group was divided into three. Conclusion: The interrelationship between internal injury and consumptive disease prescription drugs may reveal the differences and similarities between internal injury and consumptive disease and may serve as a basis for the development of new drugs or materials that can enhance mutual effectiveness in the treatment of internal injury and consumptive diseases.

• 대한한방내과학회지
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• 제38권6호
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• pp.1007-1020
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• 2017

Objectives: This study was carried out to investigate whether a prescription's composition varies according to the disease being caused by wind, which is one of the migratory pathogenic factors. Methods: An initial database and binary matrix of Pungmun in Dongui-Bogam, including its herbs and prescription, was constructed. With this data, a network map about wind stroke, arthralgia, acute arthritis, and tetanus in Dongui-Bogam was constructed. Results: Analysis of the network map about Pungmun in Dongui-Bogam revealed that the complete prescription network has more isolated nodes than does each disease's network map. Conclusions: The composition of prescriptions in Dongui-Bogam Pungmun differ according to the disease being caused by wind.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.638-640
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• 2021

망분리 환경은 내부 업무망과 외부 인터넷망을 분리하는 네트워크 보안 설계시스템으로 인터넷이 연결된 네트워크와 연결되지 않은 업무용 네트워크로 분리하여 내부 업무망과 외부 인터넷망이 분리되어 보안적 측면에서 단일망에 비해 비교적 안전한 네트워크 구조이다. 하지만 내부 시스템, 네트워크 장비, 보안장비의 취약점을 이용하여 내부망을 감염시키는 사례가 빈번하게 발생하고 있다. 본 논문에서는 이러한 망분리 환경의 IT보안 위협 취약점을 분석하고 효과적인 보안관제를 위한 기술적인 방안을 제안한다.

• 한국통신학회논문지
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• 제36권1B호
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• pp.43-50
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• 2011

최근 공격기술은 네트워크의 진화와 함께 다양한 형태로 나타나고 있으며, 대부분의 네트워크에서는 다양한 보안장치들을 통해 대응하고 있다. 또한 외부 공격으로부터 내부 네트워크의 정보자산을 보호하지 위해 기존 네트워크에 필요한 보안시스템들을 추가 배치하고 있다. 그러나 이와 같은 네트워크 구축방법 및 보안시스템의 사용은 내부 네트워크의 성능과 보안에 큰 영향을 미친다. 따라서 본 논문은 내부 네트워크의 보안시스템 사용 및 구축에 따른 성능저하요인을 분석함으로써, 향후 내부 네트워크의 성능 및 보안성 향상을 위한 자료로 활용될 것으로 기대한다.

• 한국IT서비스학회지
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• 제14권3호
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• pp.49-65
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• 2015

As South Korean large business groups, also known as Chaebol, have broadened their influence in the domestic economy, it is important to analyze the influence of internal transactions among Chaebol affiliates on their performance. In this paper, relationship between internal transactions and efficiency of Chaebol affiliates has been analyzed. Top five Chaebol groups in South Korea are selected; they include Samsung, Hyundai Motors, LG, SK, and Lotte group. Based on internal transactions among affiliates, social networks are constructed for each Chaebol group to analyze centrality, network structures and cliques. Data Envelopment Analysis (DEA) was conducted to examine the efficiency of the Chaebol affiliates. Then, correlations between the degree centrality and the efficiency of Chaebol affiliates were analyzed, and the network structures of Chaebol groups are presented. The result shows that positive correlations between degree centrality and efficiency are observed among four Chaebol Groups. This paper shows that the Social Network Analysis (SNA) techniques can be used in the empirical research for the analysis of internal transactions of Chaebol groups.

• 융합보안논문지
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• 제24권1호
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• pp.3-9
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• 2024

현재 사이버 공격과 보안 위협은 지속적으로 진화하고 있으며, 조직은 신속하고 효율적인 보안 대응 방법을 필요로 한다. 본 논문은 Unified Threat Management (UTM) 장비를 활용하여 네트워크 보안을 향상시키고, 이러한 장비를 통해 수집되는 내부망의 로그 데이터를 Elastic Stack (Elasticsearch, Logstash, Kibana, 이하 ELK Stack)을 활용하여 효과적으로 관리하고 분석하는 내부망 보안 강화방안을 제안하고자 한다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.158-161
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• 1999

This Paper proposes the architecture of WDM(wavelength division multiplexed) based large scale photonic packet switch network, which is composed of the FC(frequency converter) and OM (output module). The features of the proposed WDM based photonic packet switch network are 2-stage switch network, and WDM based internal optical link that is connected between FC and OM. This paper evaluates the internal call blocking characteristics of the photonic packet switch network. In results, we confirmed that the proposed WDM based photonic packet switch network has the potentiality in the practical implementation.

• 한국인터넷방송통신학회논문지
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• 제24권2호
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• pp.1-6
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• 2024

본 논문에서는 내부망과 VPN망을 유연하게 사용할 수 있는 보안망 NVR 시스템을 설계하고 구현하였다. 일반적으로 내부망만을 사용하는 NVR 시스템은 외부에서 접속이 불가능하여 불필요한 점검이 필요하고 외부에서 접속이 불가능하다는 단점이 있다. VPN 보안망을 이용하여 외부 접속이 가능하도록 하였으며, 기존 내부망을 그대로 사용할 수 있도록 NVR 시스템 소프트웨어를 설계, 구현하였다. 클라이언트와 NVR 시스템을 통해 내부 네트워크에서의 NVR 시스템 사용 환경을 비교해 보았다. 또한, 모바일 APP을 통해 VPN망과 함께 사용 환경을 구현하였으며, 동일한 NVR이 동일한 기능으로 정상적으로 동작하고 있음을 확인하였다. 또한 VPN 시스템 기반의 폐쇄 루프 네트워크를 통한 유연한 액세스를 위한 IP 기반 NVR에 대해서도 연구하였다.

• Journal of Korea Trade
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• 제25권2호
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• pp.134-151
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• 2021

Purpose - This study empirically analyzes the impact of the internal and external network embeddedness of foreign subsidiaries and local market characteristics of the host country on the CEO selection whether or not to appoint an expatriate as the CEO of a foreign subsidiary. Design/methodology - To conduct an empirical analysis, we obtained a list of the headquarters of Korean MNCs from the Korea Chamber of Commerce and Industry. Based on the list of HQs, we identified a final list of overseas subsidiaries of Korean MNCs that have entered the world from KOTRA (Trade-Investment Promotion Agency for Korea). Then we conducted an empirical analysis based on the results of 391 questionnaires by employing logistic regression analysis. Findings - The results of empirical analysis are as follows. First, the higher the subsidiary's internal network embeddedness, the higher the tendency appoint an expatriate as the CEO. Second, the higher the volatility of the local market, the higher the tendency to appoint an expatriate as the CEO. Third, the stronger the competition in the local market, the lower the tendency to appoint a PCN. Originality/value - This study has significant theoretical implications in that it examines the link between the internal and external embeddedness of overseas subsidiaries and the appointment of parent country nationals (PCNs) as the CEO that prior research has not examined.