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박찬익,Park, Chanik 디지털산업정보학회 2017 디지털산업정보학회논문지 Vol.13 No.2
In this study, we learned about the emergence of on-line communications originating from peoseuteol Computer Communications, the limitations of online communication, and the definition, traits and development of emoticons that serve as complementary roles, such as emotion and status. After analyzing various literacture and references, it was found that the emoticons functioned as a function of communicating the visual language of the digital era and communicating more sensitively to emotional factors. In a multimedia environment, emoticons are developed at a more advanced stage as the users' own icons due to a stronger tendency to pursue particularity and uniqueness. It is expected that eomotions added with multimedia functions will be more popular and vary in type. However, although the diversification of emotions as a commercial tool is already actively progressing, there appears a reverse effect in which an excessive use of emoticons is considered insincere in online communications. In such a background, research should be conducted that can support a systematic and effective development of emoticons through visual research rather than producing multimedia emoticons indiscreetly.
웹툰에서 영화로의 매체전환 성공 사례 연구 - 영화 <신과함께-죄와 벌>을 중심으로 -
박찬익,Park, Chanik 디지털산업정보학회 2018 디지털산업정보학회논문지 Vol.14 No.2
This media conversion in which webtoons are remediated to movies and dramas has taken off since the mid-2000s. Webtoons may be favorable for media conversion into movies and dramas as the story as finished and has proven to be fun with a fixed readership: however, only a small number of webtoon were successful box office hits or received high viewer ratings. Then in 2017, the movie <Along with the God: The Two Worlds> based on the webtoon, succeed in attracting more more then 10 million viewers. In this regard, this study derived the success factors by comparing and analyzing the narrative structure and visual elements of <Along with the God: The Two Worlds>, which was the biggest hit movie, with the original webtoon. The case analysis showed that there are two necessary elements for success: a text configuration of strategy optimized for media conversion, which is based on understanding the different media characteristics of webtoon and movie; and a configuration strategy that exaggerates the personalities of the characters and compresses the story of a webtoon which features various events and many characters in a long series, in consideration of the characteristics of movie which needs to give a big impact in 2 hours.
서울시 ‘~리단길’ 골목상권 상가거래가격에 영향을 미치는 요인 분석
박찬익(ChanIk Park),김현정(Hyunjung Kim),정창무(Chang Mu Jung) 한국감정원 연구개발실 2021 부동산분석 Vol.7 No.3
본 연구는 서울시 ‘~리단길’ 상권의 상가거래가격에 영향을 미치는 요인들을 실증 분석하는 것을 목표로 한다. 연구의 방법론으로서 다중회귀분석을 이용하여 서울시소재 5개 ‘~리단길’ 상권의 상가매매가격 결정요인에 대한 분석을 수행했다. 분석 결과, ‘인터넷 검색 빈도’, ‘200m 내 버스정류장 수’, ‘200m 내 지하철역 수’, ‘연면적’, ‘200m 내 유동인구’, ‘건물 연식’, ‘가로형 상권 더미’는 ’~리단길’ 상권의 상가거래가격과 양(+)의 관계를 보였고, ‘필지접면도로 넓이 1~8m 더미’, ‘상인주도형 더미’는 음(–)의 관계를 보이는 것으로 나타났다. 본 연구의 결과를 통해 ‘~리단길’ 상권은 해당 상권 간 공통적으로 나타나는 공간 ․ 사회적 특성에 의해 상가매매가격이 결정되지만, 접근성과 보행성 차원에서는 그 고유 특성이 다른 상권과 비슷한 경향을 갖고 있다는 점을 확인할 수 있다. ‘~Ridan-gil’ is a similarly named commercial streets which has developed into a brand through social media. Though it is one of the benchmarking elements of street revitalization projects, such streets are indeed declining due to gentrification. Accordingly, the purpose of this study is to identify the factors that affect the commercial property price of ‘~Ridan-gil’ side streets in Seoul. As a methodology, this study conducted a multiple regression analysis on the physical and social determinants of commercial property price shared between ‘~Ridan-gil’ side streets in Seoul. As the result, factors with positive correlation include ‘internet search frequency’, ‘the number of bus stops in range’, ‘the number of subway stations in range’, ‘floor area’, ‘floating population in range’, ‘building age’ and ‘main street oriented dummy’. Factors with negative correlation were ‘third-class small road dummy’ and ‘merchant-led dummy’. This study empirically analyzed how the characteristics shared between ‘~Ridan-gil’ side streets affected the commercial property price of the area. As the shared features between ‘~Ridan-gil’ do significantly affect the commercial property price, it is empirically proven that the similarly-named street do act as a brand. However, in terms of accessibility, there is few difference with other types of commercial districts or streets.
플래쉬 메모리 SSD 기반 해쉬 조인 알고리즘의 성능 평가
박장우(JangWoo Park),박상신(SangShin Park),이상원(SangWon Lee),박찬익(ChanIk Park) 한국정보과학회 2010 정보과학회 컴퓨팅의 실제 논문지 Vol.16 No.11
데이터베이스 관리 시스템의 핵심 알고리즘인 해쉬 조인은 해싱을 위한 메모리가 부족한 경우(즉, 해쉬 테이블 오버플로우) 디스크 입출력를 유발하게 된다. 하드디스크를 임시 저장공간으로 사용할 경우, 해쉬 조인의 probing 단계에서 과도한 임의 읽기로 인해 I/O 시간이 성능을 저하시키게 된다. 한편, 플래시메모리 SSD가 저장장치로 각광을 받고 있으며, 머지않아 엔터프라이즈 환경에서 하드디스크를 대체할 것으로 예상 된다. 하드디스크와 달리, 기계적인 동작 장치가 없는 플래시메모리 SSD의 경우 임의 읽기에서 빠른 성능을 보이기 때문에 해쉬 조인의 성능을 크게 향상시킬 수 있다. 본 논문에서는 플래시 메모리 SSD를 해쉬 조인을 위한 임시 저장공간으로 사용할 경우의 몇 가지 중요하고 현실적인 이슈들을 다룬다. 우선, 해쉬 조인의 I/O 패턴을 자세히 설명하고, 하드디스크에 비해 플래시메모리 SSD가 수십 배에 가까운 성능 향상을 보이는 이유를 설명한다. 다음으로, 클러스터 크기(즉, 해쉬 조인 알고리즘에서 사용하는 I/O 단위)가 성능에 미치는 영향을 제시하고 분석한다. 마지막으로, 하드디스크의 경우, DBMS의 질의 최적화기가 산출하는 비용이 실 수행시간과 편차가 클 수 있는데 반해, 플래시메모리 SSD의 경우 비용 산출을 정확히 하게 됨을 실험적으로 보인다. 결론적으로, 플래시메모리 SSD를 해쉬 조인을 위한 임시 저장공간으로 사용할 경우, 빠른 성능과 더불어 질의 최적화기의 비용 산출이 훨씬 더 신뢰할 수 있음을 보인다. Hash join is one of the core algorithms in databases management systems. If a hash join cannot complete in one-pass because the available memory is insufficient (i.e., hash table overflow), however, it may incur a few sequential writes and excessive random reads. With harddisk as the tempoary storage for hash joins, the I/O time would be dominated by slow random reads in its probing phase. Meanwhile, flash memory based SSDs (flash SSDs) are becoming popular, and we will witness in the foreseeable future that flash SSDs replace harddisks in enterprise databases. In contrast to harddisk, flash SSD without any mechanical component has fast latency in random reads, and thus it can boost hash join performance. In this paper, we investigate several important and practical issues when flash SSD is used as tempoary storage for hash join. First, we reveal the I/O patterns of hash join in detail and explain why flash SSD can outperform harddisk by more than an order of magnitude. Second, we present and analyze the impact of cluster size (i.e., I/O unit in hash join) on performance. Finally, we emperically demonstrate that, while a commerical query optimizer is error-prone in predicting the execution time with harddisk as temporary storage, it can precisely estimate the execution time with flash SSD. In summary, we show that, when used as temporary storage for hash join, flash SSD will provide more reliable cost estimation as well as fast performance.
이기종 저장장치를 위한 제거 비용 평가 기반 캐시 관리 기법
박세진,박찬익,Park, SeJin,Park, ChanIk 대한임베디드공학회 2012 대한임베디드공학회논문지 Vol.7 No.3
The objective of cache is to reduce I/O access of physical storage device so that user accesses their data faster. Traditionally, the most important metric to measure the performance of cache is hitratio. Thus, when the cache maintains hitratio high, it is regarded as a good cache replacement policy. However, the cache miss latency is different when the storages are heterogeneous. Though the cache hitratio is high, if the cache often misses with low performance disk, then the user experiences low performance. To address this problem we proposed eviction cost estimation based cache management. In our result, the eviction cost estimation based cache management has 10~30% throughput improvement compared with LRU cache management.