ndnSIM 기반 NDN 네트워크 구현 및 성능 평가

박상현,임헌국,Park, Sanghyeon,Lim, Huhnkuk 한국정보통신학회 2022 한국정보통신학회논문지 Vol.26 No.5

Named Data Networking (NDN) is a representative technology of ICN that realizes the future Internet architecture. NDN searches for data by its content and not by its host IP address. The consumer generates an interest packet and sends it to the NDN network. The NDN network uses three tables such as CS, FIB, and PIT and forwards the received interest packet to the next hop. The producer transmits the data packet to the consumer through a name-based forwarding scheme. In this paper, we design and implement an ndnSIM-based NDN network and perform performance evaluation. We analyze the ndnSIM structure and develop a 6-node congested NDN network and a 9-node grid NDN network using ndnSIM. In the simulation, the performance of latency and throughput of the interest packet rate are measured. We analyze the effect of congestion on the latency and throughput of the NDN network. This approach will help researchers in the future.

철강 산업 기업의 스마트팩토리 도입 운영 형태가 품질 안정화에 미치는 관계

박상현 ( Park Sanghyeon ),이경구 ( Rhee Kyong-gu ) KNU기업경영연구소 2021 기업경영리뷰 Vol.12 No.1

The deceleration in competitiveness of the manufacturing industry that used to drive the Korean economy in the past has not only led to an overall crisis of the manufacturing industry but has also increased to the point where it is a threat on a national level. Therefore, the small and large manufacturing corporations within the industry have been grappling to find measures to secure manufacturing competitiveness. Meanwhile, corporations have been displaying trends of trying to strengthen corporate manufacturing competitiveness through introducing the smart factory operations as an effort to secure manufacturing competitiveness in the recent times. Such strategitc ventures of the corporate manufacturing industry is also a positive result for the excellence of smart factory operations. Hence, there are many researches related to smart factory, including in the fields of engineering and humanities and social science, which are being actively conducted. Based on this background, this study was performed to demonstrate the effectiveness of the superiority of smart factory operations of manufacturing corporations. As for the scope of study, the study was conducted on subjects of manufacturing corporations in the steel industry and it was was attempted to analyze the influencing relationship between the initial operation forms of corporate smart factories on the quality stabilization of corporations. For the purpose of this study, programs SPSS18 and AMOS21 were utilized and the structural equation model was applied for the analysis. As a result of the study, the influencing relationship between the initial operation factor of smart factories and corporate quality stabilization was partially adopted.

블록체인 기반 거버넌스 시뮬레이터

박상현(Sanghyeon Park),박민서(Minseo Park),구명완(Myoungwan Koo) 한국정보과학회 2018 한국정보과학회 학술발표논문집 Vol.2018 No.12

잡음 섞인 이미지 업샘플링을 위한 적응적 최소자승법

박상현(Sanghyeon Park),정재훈(Jaehun Jeong),이준석(Junseok Lee),이세영(Seyeong Lee),정병선(Byeongseon Jeong) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

In this paper, we propose a noisy image upsampling algorithm that produce a denoised image with improved visual quality from a noisy, low-resolution input. The proposed algorithm updates old values of image pixels and inserts new ones between them by using the weighted leastsquares method adaptively. We construct the weights based on the distance between two image pixels and the error between two image patches. The experimental results demonstrate that the proposed algorithm considerably reduces the staircase effect.

Material Point Method를 이용한 컴플라이언스와 응력 기반 위상 최적 설계

박상현(Sanghyeon Park),박준혁(Junhyeok Park),정하영(Hayoung Chung) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

텍스트마이닝 기법을 활용한 한국인의 행복과 불행 탐색연구

박상현(Sanghyeon Park),도강혁(Kanghyuk Do),김학영(Hakyeong Kim),박가은(Gaeun Park),윤진혁(Jinhyeok Yun),김경일(Kyungil Kim) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.7

본 연구에서는 텍스트 마이닝 분석을 통해 한국 사회에서 행복과 불행이 갖는 의미를 탐색하였다. 자료수집 및 분석을 위하여 온라인 뉴스 포털에서 Word2Vec과 TF-IDF 방법을 사용하여 ‘행복’ 및 ‘불행’ 키워드와 유사한 단어를 추출했다. 또한 K-LIWC 사전을 사용하여 행복 및 불행과 연관된 단어들의 감성 속성에 대해 알아보았다. TF-IDF 분석 결과, 행복과 불행은 사회적 요인과 해당 년도의 사회적 이슈들과 각각 높은 관련성이 있는 것으로 관찰됐다. Word2Vec 분석에서는 ‘희망’이 6년 연속으로 행복과 유사성이 높은 단어로 나타났다. K-LIWC 분석에서 ‘돈재정적이슈’, ‘학교’, ‘의사소통’은 행복 및 불행과 모두 관련성이 높았다. 그밖에 ‘몸 상태와 증상’이 불행과 높은 관련성이 있는 범주로 나타났다. 이러한 결과를 바탕으로 본 연구의 의의, 제한점 및 후속연구에 대한 필요성을 논의하였다. The purpose of this study is to explore the meaning of happiness and unhappiness in Korean society through text mining analysis. Similar words with keywords(happiness/unhappiness) from online news portal are extracted using Word2Vec and TF-IDF method. We also use the K-LIWC dictionary to perform the sentiment analysis of words associated with happiness and unhappiness. In TF-IDF analysis, happiness and unhappiness are highly related to social factors and social issues of the year. In Word2Vec analysis, Hope has been similar with happiness for six years. In K-LIWC analysis, ‘money/financial issues’, school, communication is highly related with happiness and unhappiness. In addition, physical condition and symptom is highly related to unhappiness. Implications, limitations, and suggestions for future research are also discussed.

부하가 불규칙하게 분포된 배전선로의 전압추정 방법

박상현(Sanghyeon Park),임성일(Seongil Lim) 대한전기학회 2018 전기학회논문지 Vol.67 No.4

Most of the applications for distribution system operation highly rely on the voltage and current managements from the field devices. Voltage from the remote controlled switch contains unacceptably large measurement error due to the nonlinear characteristics of the bushing potential transformer. This paper proposes a new voltage magnitude estimation method by calculating voltage drop using current measurement, line impedance and loads deployment data. Contract demand power and pole transformer capacity managed by NDIS are used as a key element to improve accuracy of the proposed method. Various case studies using Matlab simulation have been performed to verify feasibility of the propose voltage estimation method.

음식축제 품질, 지각된 가치, 만족도, 행동의도의 관계 : 지역주민과 관광객의 조절효과를 중심으로

박상현(Park, Sanghyeon),이경여(Lee, Kyungyur),최기종(Choi, Gijong) 대한관광경영학회 2020 觀光硏究 Vol.35 No.2

Many cultural tourism festivals are food-themed, and food is also an important factor in other-themed festivals. However, due to the disadvantage of most festivals being held outdoors for short periods of time, it is difficult to maintain quality. The tourists spending time and money attending festivals decide the value of visiting, depending on the quality of festivals. Since the perceived value affects visitor satisfaction, word of mouth, and revisit intention, it needs to be well planed and managed. This study aims to analyze the structural relationship of quality, perceived value, satisfaction, and behavioral intention of food festivals, and analyze the moderating effects of local residents and tourists. The data were collected from the visitors to the 2019 Chuncheon Makgooksoo Dak-galbi festival. The results of the structural model reveal that food quality had significant influences on emotional, price, and social values with regard to the relationship between festival quality and perceived value. The content quality of the festivals had significant influences on emotional and social values. However, the quality of the festival facilities did not significantly affect the perceived value. In relation to the perceived value of the festival, satisfaction and behavioral intention, the emotional, price, and social values of the festival had significant effects on satisfaction and behavioral intention. The moderating effect of local residents was greater in relation to social values, satisfaction and behavioral intention than that of tourists. The scholarly contribution of this study is analysis of the moderating effects of local residents and tourists in relation to quality, perceived value, satisfaction, and behavioral intention. It also offers practical implications that could help in planning and managing other food festivals. 문화관광축제의 상당수가 음식을 주제로 한 축제이고 일반 축제도 음식이 중요 요소이다. 그러나 축제가 단기간에 야외에서 개최되는 특성상 적절한 품질이 유지되기 어려운 것이 현실이다. 많은 시간과 비용을 할애해서 축제를 방문한 관광객에게 방문할 만한 가치가 있었는지에 대한 판단은 축제의 품질에 달려있다. 이것은 방문객의 만족도와 구전 그리고 재방문 의도에 영향을 미치기 때문에 철저한 점검과 관리가 필요하다. 본 연구는 2019 춘천막국수닭갈비 축제 방문객을 대상으로 음식축제의 품질, 지각된 가치 그리고 만족도 및 행동의도에 관한 구조적 관계를 분석하고 지역주민과 관광객의 조절효과를 분석하였다. 분석결과 축제의 품질과 지각된 가치의 관계에서는 음식 품질이 감정적 가치, 가격 가치, 사회적 가치에 유의한 영향을 미쳤고 축제의 내용 품질은 감정적 가치, 사회적 가치에 유의한 영향을 미치는 것으로 나타났다. 그러나 축제 시설 품질은 지각된 가치에 유의한 영향을 미치지 않았다. 축제의 지각된 가치와 만족도 및 행동의도와의 관계에서는 축제의 감정적 가치, 가격가치, 사회적 가치 모두 만족도 및 행동의도에 유의한 영향을 미쳤다. 지역주민과 관광객의 조절효과는 지역주민이 관광객보다 사회적 가치와 만족도 및 행동의도 간에 더 크게 나타났다. 본 연구는 기존 연구의 품질, 지각된 가치, 만족도 및 행동의도의 관계에서 지역주민과 관광객의 조절효과를 분석했다는 점에서 학문적 기여를 하였으며 다른 음식축제를 기획하고 운영하는데 도움이 될 수 있는 실무적 시사점을 제공하였다.

O2O 품질이 고객만족도 및 재구매의도에 미치는 영향 : 중국 서비스 경험자를 중심으로

박상현(Sanghyeon Park),장휘(Zhanghui) 한국통상정보학회 2021 통상정보연구 Vol.23 No.4

본 연구는 중국 경험자를 중심으로 O2O 서비스품질이 고객만족 및 재구매 의도에 미치는 영향관계 여부를 실증하고자 하였다. 본 연구에 대한 설문 방식으로는 편의표본추출 방법을 적용하였으며, 2021년 3월 22일부터 4월 17일 기간에 걸쳐 설문을 진행하였다. 분석방법으로는 구조방정식 모형에 기초하여 단계별 실증분석을 하였다. 연구결과, O2O 품질 편리성은 고객만족에 유의한 영향관계가 있었다. 또한 고객만족과 재구매 의도 관계 결과를 실증한 결과, 유의한 결과를 나타냈다. 반면, O2O 품질 신뢰성은 유의하지 못한 결과를 나타내고 있어 연구모형에 대한 결과를 부분 채택되었다. 이러한 관점에 소비자 트렌드 환경에 대한 이해와 속성을 기준하여 비즈니스 모델을 발전해 나가는 점이 중요하며, 직간접적으로 지지해 줄 수 있는 편리성이 뒷받침돼야 한다. 따라서 소비자를 만족시켜 나갈 수 있는 기초 특성에 기초하여 세부 발전 계획을 수립해 나가야 한다. This study tried to prove whether O2O service quality had an effect on customer satisfaction and repurchase intention, centering on those with experience in China. The convenience sampling method was applied as the survey method for this study, and the survey was conducted from March 22, 2021 to April 17, 2021. As an analysis method, empirical analysis was performed in stages based on the structural equation model.As a result of the study, O2O quality and convenience had a significant influence on customer satisfaction. In addition, as a result of demonstrating the relationship between customer satisfaction and repurchase intention, significant results were shown. On the other hand, O2O quality reliability showed insignificant results, so the results for the research model were partially adopted. Moreover, From this perspective, it is important to develop a business model focused on an understanding and attributes of the consumer trend environment, and convenience that can be directly or indirectly supported must be supported. Therefore, it is necessary to establish a detailed development plan based on the basic characteristics that can satisfy consumers.

Material Point Method를 이용한 컴플라이언스와 응력 기반 위상 최적 설계

박상현(Sanghyeon Park),박준혁(Junhyeok Park),정하영(Hayoung Chung) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11