• 한국융합학회논문지
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• 제11권3호
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• pp.181-186
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• 2020

본 연구는 온라인동영상서비스 OTT(Over-the-Top) 이용자의 몰아보기(Binge-watching) 시청행위에 영향을 미치는 요인을 실증적으로 탐색하였다. 이를 위해 2018년 한국언론진흥재단 미디어연구센터의 'OTT 서비스 이용자 인식조사'에 참여한 OTT 이용 경험자 1,000명의 자료를 수집하여 분석하였다. 종속변수는 OTT 서비스 몰아보기로 설정하였으며, 독립변수는 성별, 연령, OTT 서비스 이용 빈도, OTT 콘텐츠 프로그램 추천 알고리즘 만족도, OTT에서 주로 이용하는 콘텐츠 유형을 포함하였다. OTT 몰아보기 시청행위의 예측 요인은 다층 퍼셉트론(MLP) 인공신경망 알고리즘을 이용하여 분석하였다. 연구결과, 연령, OTT 콘텐츠 프로그램 추천 알고리즘 만족도, OTT 서비스 이용 빈도, OTT에서 주로 이용하는 콘텐츠 유형 중 국내드라마, 국내영화, 해외드라마 등이 OTT 몰아보기 시청행위에 중요도가 높은 요인으로 밝혀졌다.

• 문화기술의 융합
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• 제10권3호
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• pp.851-860
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• 2024

디지털 시대의 도래와 함께 전 세계적으로 확산한 온라인 스트리밍 서비스, 특히 OTT(Over The Top) 서비스는 소비자들에게 주요 콘텐츠 소비 매체로 자리매김하여 그 경쟁이 치열해지고 있다. 이에 본 연구는 OTT 서비스를 소비자 관점에서 미디어 소비 패턴에 미치는 영향을 분석하였다. 소비자 중심의 서비스 가치가 OTT 플랫폼 선택, 소비자 만족도, 브랜드 충성도에 어떤 영향을 미치는지에 대해 연구하였으며, 콘텐츠의 다양성, 사용 용이성, 가격성, 브랜드 인지도, 개인화 서비스 등 다양한 요소들을 분석하였다. 연구 결과, 콘텐츠의 다양성, 사용 용이성, 가격성은 소비자 만족도와 브랜드 충성도에 긍정적인 영향을 미치는 주요 요인으로 나타났으며, 이는 OTT 플랫폼 선택에도 중요한 동기가 됨을 보여준다. 반면, 개인화 서비스는 예상과 달리 유의미한 영향을 미치지 않았다. 이 연구는 OTT 서비스 제공자들이 소비자 중심의 가치를 강화하고 경쟁력 있는 서비스를 제공하기 위한 전략 수립에 중요한 통찰을 제공한다.

• 한국정보과학회논문지:데이타베이스
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• 제33권5호
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• pp.538-550
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• 2006

XML 문서에 대한 키워드 검색은 사용자로 하여금 XML 문서의 복잡한 구조에 관한 지식 없이 쉽게 정보를 검색할 수 있게 해준다. 또한 사용자의 정보 요구에 대해 해당 정보를 포함하는 문서 전체를 반환하는 기존의 정보 검색 시스템과 달리 문서 내의 해당 정보를 포함하는 문서 조각을 결과로 반환함으로써 보다 빠르게 원하는 정보를 얻을 수 있도록 도와준다. 이러한 특징은 XML 문서 검색 시스템이 XML 문서를 문서 단위가 아닌 세부적인 엘리먼트 단위로 처리함으로써 가능하다. 하지만 이로 인해 대용량 문서들에 대한 질의 처리 부담 역시 가중되었다. 본 논문에서는 엘리먼트 단위 질의 처리의 비용을 줄이기 위해 XML 문서에 대한 문서 단위 순위화 기법을 제안하는데, 이는 결과물의 점수에 영향을 미치는 질의 키워드들의 문서 내에서의 근접도를 경로 노드 집합 정보와 이에 대한 유사도를 통해 구함으로써 엘리먼트 단위 질의 처리 결과를 예측하고 문서 단위 점수를 계산한다. 이러한 문서 중심의 뷰는 대용량 문서에 대한 순위화 혹은 필터링을 가능하게 해주며, 우리는 문서 단위 인덱스를 통해 순위가 높은 문서를 우선적으로 처리함으로써 Top-k 질의에 대해 검색 성능을 높였으며, 실험을 통해 해당 기법의 유효성과 성능 향상을 검증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 G
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• pp.2309-2311
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• 1998

The attitude control of a double inverted pendulum with a periodical disturbance at link top is dealt in this paper. The proposed system is consisted of the double inverted pendulum and a disturbance link. The lower link is hinged on the plate to free for rotation in the vertical plane. The upper link is connected to the lower link through a DC motor. The DC motor is used to control the posture of the pendulum by adjusting the position of the upper link. The periodical disturbance can be generated by the additional link attached at the end of link 2 through another DC motor, which is the modeling of a posture for a biped supporting with one leg. The motor for the joint simulates the knee joint(or hip joint) and the disturbance for the legs moving in air. The algorithm for controlling a proposed inverted pendulum is consisted of a state feedback control and a fuzzy logic controller. The fuzzy controller keeps the center of gravity of the biped within the specified range through the nonlinear feedback compensator. The state feedback control takes over the role to maintain a desired posture regardless the disturbance at the link top. In these case, the change of the angle and COG of an upper link is compensated with on-line. Simulations with a mathematical model are conducted to show the validity of the proposed controller.

• 한국지구과학회지
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• 제23권1호
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• pp.59-71
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• 2002

Theoretical models of radiative transfer are developed to simulate the 85 GHz brightness temperature (T85) observed by the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) radiometer as a function of rain rate. These simulations are performed separately over regions of the convective and stratiform rain. TRMM Precipitation Radar (PR) observations are utilized to construct vertical profiles of hydrometeors in the regions. For a given rain rate, the extinction in 85 GHz due to hydrometeors above the freezing level is found to be relatively weak in the convective regions compared to that in the stratiform. The hydrometeor profile above the freezing level responsible for the weak extinction in convective regions is inferred from theoretical considerations to contain two layers: 1) a mixed (or mixed-phase) layer of 2 km thickness with mixed-phase particles, liquid drops and graupel above the freezing level, and 2) a layer of graupel extending from the top of the mixed layer to the cloud top. Strong extinction in the stratiform regions is inferred to result from slowly-falling, low-density ice aggregates (snow) above the freezing level. These theoretical results are consistent with the T85 measured by TMI, and with the rain rate deduced from PR for the convective and stratiform rain regions. On the basis of this study, the accuracy of the rain rate sensed by TMI is inferred to depend critically on the specification of the convective or stratiform nature of the rain.

• Journal of Astronomy and Space Sciences
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• 제28권1호
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• pp.79-91
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• 2011

Ongnu (Jade Clepsydra; also called Heumgyeonggaknu) is a water clock was made by Jang Yeong-sil in 1438. It is not only an automatic water clock that makes the sound at every hour on the hour by striking bell, drum and gong, but also an astronomical clock that shows the sun's movement over time. Ongnu's power mechanism used is a water-hammering method applied to automatic time-signal device. The appearance of Ongnu is modeled by Gasan (pasted-paper imitation mountain) and Binpungdo (landscape of farming work scene) is drawn at the foot of the mountain. The structure of Ongnu is divided into the top of the mountain, the foot of the mountain and the flatland. There located are sun-movement device, Ongnyeo (jade female immortal; I) and Four gods (shaped of animal-like immortals) at the top of the mountain, Sasin (jack hour) and Musa (warrior) at the foot of the mountain, and Twelve gods, Ongnyeo (II) and Gwanin on the flatland. In this study, we clearly and systematically understood the time-announcing mechanism of each puppet. Also, we showed the working mechanism of the sun-movement device. Finally, we completely established the 3D model of Ongnu based on this study.

• 지식경영연구
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• 제17권2호
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• pp.165-185
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• 2016

Though Korea has received attention through an exceptional economic growth and the big K-POP fever all over the world, its happiness level is not so high. Therefore, this research aims to find not only the Korean' s condition of the happiness and unhappiness, but also the way to enhance their happiness. We collected various web data(89,127 cases from 2013/01 to 2014/12) through searching our own 26 keywords based on Alderfer's ERG Theory. Also, we tried to analyze the subjects related to happiness and unhappiness by using LDA topic modeling. As the result, the condition of happiness and unhappiness were the top topics extracted from each field. We conducted the second detailed analysis based on the data of condition of the happiness and unhappiness which are the top topics of the previous analysis. From the second analysis result, we proposed several ways to enhance happiness from the perspective of government, corporate, family, education, social welfare.This paper is meaningful because it catches the condition of happiness and unhappiness based on a real web data as well as transform the data into the knowledge. Also, this paper provides the practical methods from the view from all walks of life that may enhance happiness and relieve unhappiness.

• 패션비즈니스
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• 제17권3호
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• pp.99-108
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• 2013

The purpose of this study is to do a detailed analysis of the layouts and components of the main pages of the SOHO malls, which serve as its display window, and in turn, find a successful strategy for SOHO malls in the over saturated Internet shopping mall market. To analyze the components and layout of the main page of the SOHO Internet apparel shopping malls, top 50 Internet apparel shopping malls for woman and top 50 Internet apparel shopping malls for man, ranked within Internet shopping mall were selected. Data were collected from the coding sheets surveyed on the Internet apparel shopping malls for one month (September 2012). The result showed different patterns in various aspects between women's and men's malls. 1) The men's malls used product pictures more frequently in their main pages than the women's malls 2) The sections for jewelry and beauties were usually included in men's apparel shopping malls. 3) Men's malls usually had a rather crowded layout with numerous banners in order to expose their promotional items to the fullest. 4) men's malls provided a more detailed promotional and product information regarding the display items on its main pages. 5) Women's malls had a wider range of price distribution and generally higher prices.

• Agribusiness and Information Management
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• 제4권1호
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• pp.1-12
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• 2012

Cameroon, with her numerous resources, still depends on foreign aid while the rate of poverty remains high. Thus, even though historical evidence gives impetus to the impasse over role of developmental aid, from the top down approach through to development as a springboard raising states from the doldrums of poverty, it is still very difficult to draw a substantial relationship between developmental aid and poverty reduction. Against this backdrop of controversy, I find it apt to put Cameroon on a balance scale. Therefore, the purpose of this research is to critically assess the implications of developmental aid on poverty reduction and agro-rural development in Cameroon, using the RUMPI Area Development Project in the South West region of Cameroon as a case study. The study will situate and contextualize the top-down and bottom-up approaches to development within the basis of a Cameroonian perspective, using the Sachs-Easterly debate. The RUMPI Project was introduced with the objective of improving agriculture and empowering the rural woman; thereby fighting poverty within the South West region of Cameroon. Despite its criticism of the barriers to development created by corruption, political pressure and limited use of local and grass-root partnerships, the study, in assessing these failures also tries to outline vital ways in which the project can be improved upon.

• International Journal of Advanced Culture Technology
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• 제10권4호
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• pp.19-27
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• 2022

The purpose of this study is to investigate the incidence rate, surgery tendency, and risk factors of cataracts among the elderly in Korea. The subjects were 40-95 years old men and women using the National Health Services' surgical statistics. Among the 33 major surgeries, which increased by 1.1% per year for the last 20years (1.6 million), the most operated surgery in 2020 was cataract surgery (454,000), the number of which was 858.8 per 100,000 people. Among the surgical patients, cataract patients (7.9% increased) was the third largest among the top (2016-2020) constantly with annually 2.2% increasing for 20 years (19.95 million). The medical expenses of major surgeries (excluding non-benefit) increased by an average rate of 9.3% per year over the 20 years (7,204 billion won) out of a total medical expenses of 7.2 trillion won, and the cataract surgery (813.2 billion won) was the second largest among the medical expenses in 2020 (top 3). This study showed that there was a high correlation between cataract and smoking, low income, and low-educated, whereas being no concentration of cataract patient in tertiary hospitals.