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유튜브 데이터 마이닝을 통한 영상 소비자들의 관심주제 분석 : 유아동 콘텐츠의 사례
박영준,송용백,이승윤,이준송,윤장혁 대한산업공학회 2019 대한산업공학회 추계학술대회논문집 Vol.2019 No.11
Customer analysis has had a significant impact on a variety of business areas. Especially, it plays a key role in the Digital Media field. According to recent studies, various analysis based on social data from popular Digital Media, such as YouTube, is in progress. However, few studies use a customer’s actual response, “user’s sentiment”. Thus, we study how to understand their reactions by using Deep-Learning Sentimental Analysis and Time Series Analysis to catch the megatrends of Digital Media and predict intellectual trends soon. In this study, our theme only focuses on Youtube kids’ channel contents. We extract megatrends which we define as a ‘Subjects of user’s interest’ using Weighted Term-Frequency Matrix from related video title and description. As the following step, we use both Sentimental Analysis and Time Series Analysis to discover potential trends. We expect this study to contribute to Multi-Channel Network(MCN) business and help creators to make popular content considering real consumer interests.
박영준,백영준 한국세라믹학회 1999 한국세라믹학회지 Vol.36 No.4
Laser lapping of diamond films is performed with focused beam of copper vapor laser. Both spherical and rod-shape laser beam are used. Diamond surface is scanned at various scan speeds(0,125, 0.5, 0.75 mm/sec) and baem shifts (5, 10, 20, 40, 100$\mu\textrm{m}$) At 0.125 mm/sec 10$\mu\textrm{m}$ scan condition the level difference of di-amond surface of about 700$\mu\textrm{m}$ over 20 mm is reduced to 200$\mu\textrm{m}$ In addition surface roughness is also im-proved from 3.53$\mu\textrm{m}$ to 2.47$\mu\textrm{m}$ at 5$\mu\textrm{m}$ beam shift. But at higher beam shift than 10$\mu\textrm{m}$ laser scan makes the surface rougher which is considered to be due to the non uniform spatial distribution of laser en-ergy. It is concluded that homogenized laser beam with high average power is needed for large area laser lapping of diamond films at appreciable rates.
박영준,서태경,김신혜,백무진 대한이비인후과학회 부산,울산,경남 지부회 2020 임상이비인후과 Vol.31 No.2
Bilateral facial palsy is a rare disease which accounts for 0.3~2.0% of the facial palsy cases. Bilateral facial palsy is defined as simultaneous onset of facial palsy which means the involvement of the opposite side within 4 weeks of the onset of the first side. The underlying etiology of bilateral facial palsy can be extensive - neurological, infectious, neoplastic, traumatic, metabolic or degenerative disorders are included. Although it can be a diagnostic challenge, rapid diagnosis is essential for proper treatment. Hearin, we report our experiences of two cases with bilateral facial palsies of different causes; one with bilateral Bell’s palsy, and the other with GuillainBarre syndrome with bilateral facial palsy.