• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제3권1호
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• pp.7-14
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• 2014

스마트 폰, 스마트 패드 등 다양한 모바일 기기의 등장으로 언제, 어디서나 이동 중에도 끊김없는 멀티미디어 서비스의 필요성이 증대하고 있다. 현재 4G 모바일 기기들은 4G (LTE)와 WLAN (WiFi) 인터페이스를 동시에 가지고 있으며, 이동 통신사업자들은 커버리지가 넓은 4G망 뿐만 아니라 WiFi zone을 통하여 무선 인터넷 서비스를 지원하고 있다. 일반적으로 사용자들은 WLAN 커버리지내에서는 LTE를 통한 서비스 보다도 데이터 사용량에 제한이 없는 WLAN을 통한 서비스를 선호하고 있다. 그러나 WLAN은 L2 핸드오버 지연이 매우 크기 때문에 핸드오버를 수행하는 동안에 끊김없는 서비스가 어려운 문제가 있다. 본 논문에서는 flow mobility를 기반으로 WLAN 간에 핸드오버를 수행하는 동안 서비스 반경이 넓은 4G망을 활용하여 끊김없는 서비스를 지원할 수 있는 방안을 제안하였으며, 테스트베드 구현을 통하여 제안 방안의 우수성을 검증하였다.

• 한국정보통신학회논문지
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• 제17권5호
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• pp.1113-1118
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• 2013

오늘날 HTML5와 JavaScript를 활용한 하이브리드 웹 기반의 실시간 화상통신 기술이 대두되고 있다. 이에 본 논문에서는 HTML5를 지원하는 웹 브라우저를 이용한 실시간 화상통신 기술에 대해 연구하였다. HTML5와 JavaScript를 기반으로 시스템을 설계 및 구현하였으며, 서로 상이한 웹 브라우저들 간의 웹서버를 통해 RTC API와 HTTP/WebSockets 등을 사용하여 웹 브라우저를 활용한 실시간 화상통신을 가능하게 하였다. 이는 PC 및 노트북, 스마트패드, 스마트폰 등 모든 웹 브라우저의 사용 가능한 단말 기기로 사용 가능으로 별도의 회원가입이나 플러그인 등의 설치 없이 이용 가능하다. 이는 네트워크가 연결된 모든 환경에서 웹 브라우저의 이용이 가능한 모든 단말에서 사용가능하며, 제한적인 환경에서의 화상통신분야에 활용될 것이다.

• 감성과학
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• 제20권2호
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• pp.171-178
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• 2017

캥거루 케어의 특징을 반영하여 신생아의 감성에 긍정적인 영향을 미치는 스마트 감성 매트(SSM; Smart Sensibility Mat)를 개발, 제작하였다. 청감 자극의 경우 사전에 녹음된 어머니의 심장박동소리와 목소리를 30dB로 제공할 수 있는 블루투스 스피커를 매트에 삽입하였다. 촉감 자극의 경우 $32^{\circ}C$의 일정한 온도를 제공하기 위해 실리콘 소재의 온수 튜브를 매트의 표면에 삽입하고 자동온도조절장치와 연결하였다. 매트의 전체에 균일한 온도 제공을 위해 열전도성 실을 삽입한 직물을 매트 표면에 부착하였다. 면 패드로 매트를 감싼 후 피부 접촉과 비슷한 촉감 자극을 주기 위해 폴리우레탄 폼을 매트 표면에 접착하였다. SSM이 신생아의 감성에 미치는 효과를 보기 위해 생후 2주 이내의 건강한 신생아 10명을 대상으로 일반 매트(GM; General Mat) 및 SSM에 있을 때 생리신호인 심박수, 호흡수와 체온을 10분 간격으로 2회씩 측정하였다. 이를 3일에 걸쳐 1일 1회씩 측정한 후 대응표본 t검정을 실시하였다. 그 결과, GM에 있을 때 보다 SSM에 있을 때 심박수(t=8.131, p<.001)와 호흡수(t=7.227, p<.001)가 정상범위 안에서 유의적으로 감소하였다. 이는 SSM의 감각 자극이 신생아의 심리적 안정에 긍정적인 영향을 미쳐 GM보다 빠른 시간 내에 심리적 안정을 주는데 기여한 것으로 볼 수 있다.

• IEIE Transactions on Smart Processing and Computing
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• 제4권5호
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• pp.297-304
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• 2015

A multilayer gaseous detector has been developed for fast dose-verification measurements of raster-scan-mode therapeutic beams in particle therapy. The detector, which was constructed with eight thin parallel-plate ionization chambers (PPICs) and polymethyl methacrylate (PMMA) absorber plates, is closely tissue-equivalent in a beam's eye view. The gas-electron signals, collected on the strips and pad arrays of each PPIC, were amplified and processed with a continuous charge.integration mode. The detector was tested with 190-MeV raster-scan-mode beams that were provided by the Proton Therapy Facility at Samsung Medical Center, Seoul, South Korea. The detector responses of the PPICs for a 190-MeV raster-scan-mode proton beam agreed well with the dose data, measured using a 2D ionization chamber array (Octavius model, PTW). Furthermore, in this study it was confirmed that the detector simultaneously tracked the doses induced at the PPICs by the fast-oscillating beam, with a scanning speed of 2 m s-1. Thus, it is anticipated that the present detector, composed of thin PPICs and operating in charge.integration mode, will allow medical scientists to perform reliable fast dose-verification measurements for typical dynamic mode therapeutic beams.

• 전기학회논문지P
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• 제65권4호
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• pp.326-334
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• 2016

In this paper for developing and implementing the realtime HD level video streaming transmitter which is operated on the multi-platform in all network and client environment compared to the exist video live streaming transmitter. We design the realtime HD level video streaming transmitter supporting the multi-platform using the TMS320DM386 video processor of T.I company and then porting the Linux kernel 2.6.29 and implementing the RTSP(Real Time Streaming Protocol)/RTP(Real Time Transport Protocol), HLS(Http Live Streaming), RTMP(Real Time Messaging Protocol) that can support the multi-platform of video stream protocol of the received equipments (smart phone, tablet PC, notebook etc.). For proving the performance of developed video streaming transmitter, we make the testing environment for testing the performance of streaming transmitter using the notebook, iPad, android Phone, and then analysis the received video in the client displayer. In this paper, we suggest the developed the Realtime HD(High Definition) level Video Streaming transmitter performance data values higher than the exist products.

• 한국의류학회지
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• 제41권5호
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• pp.901-913
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• 2017

This study analyzed the current state of art by investigating related patents of cycling wear, and suggested fundamental data to develop clothing - originated in Korea. Patent trends were then analyzed after the related patents applied in Korea, USA, and Japan from 1975 to 2015 were extracted using WIPS ON, classified as nation, applicant, technology, use, and technological maturity of the applicant country. The number of patent applications has steadily increased since the 1990s, and has steeply grown since the 2000s. The USA accounted for 55.6% of all collected patents in the study, Japan for 30.6%, and Korea for 13.7%. Technologies related to patterns and functional materials have been dominated by the USA and Japan; however, smart technologies have been actively developed in Korea. According to use, USA focused on functionality, Korea concentrated on safety, and Japan uniformly combined functionality, safety, and convenience. According to the positioning of technology by application, water repellency, stretchability, muscle strengthening, pad, panel, finishing, and weaving technologies were positioned in the functionality.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2016년도 추계학술발표대회
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• pp.566-567
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• 2016

최근 스마트기기가 발전함에 따라 종이책이 아닌 다양한 전자책뷰어가 등장하고 있다. 애플의 아이패드(iPad), 아마존의 킨들(kindle)과 같은 태블릿, 전자책 또는 스마트폰이 대표적인 예이며 스마트기기의 사용자 증가로 전용 단말기가 아닌 스마트폰 중심의 전자책 시장도 크게 성장하고 있다. 하지만 시니어 또는 스마트기기 사용을 어려워하는 사용자들이 전자책을 사용하는데 어려움을 느끼기 때문에, 전자책은 종이책에 비해 여전히 낮은 이용률을 나타내고 있다. 본 논문에서는 얼굴 표정에 따라서 전자책 설정을 자동으로 변경해 주는 방법을 제안한다. 제안한 방법은 표정감지를 위하여 OpenCV 라이브러리를 이용하여 얼굴을 검출하고, Haar-Like 피처 기법으로 사용자의 눈 모양을 검출한다. 눈이 감겨있는 경우와 찌푸린 경우를 감지하여 이에 맞게 글자크기와 화면을 자동으로 설정해 준다.

• 한국IT서비스학회지
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• 제13권3호
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• pp.309-321
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• 2014

Recently, due to the advent of ubiquitous computing and the spread of intelligent portable device such as smart phone, iPad and PDA has been amplified, a variety of services and the amount of information has also increased fastly. It is becoming a part of our common life style that the demands for enjoying the wireless internet are increasing anytime or anyplace without any restriction of time and place. And also, the demands for e-commerce and many different items on e-commerce and interesting of associated items are increasing. Existing collaborative filtering (CF), explicit method, can not only reflect exact attributes of item, but also still has the problem of sparsity and scalability, though it has been practically used to improve these defects. In this paper, using a implicit method without onerous question and answer to the users, not used user's profile for rating to reduce customers' searching effort to find out the items with high purchasability, it is necessary for us to analyse the segmentation of customer and item based on customer data and purchase history data, which is able to reflect the attributes of the item in order to improve the accuracy of recommendation. We propose the method of recommendation system using association rule and weighted preference so as to consider many different items on e-commerce and to refect the profit/weight/importance of attributed of a item. To verify improved performance of proposing system, we make experiments with dataset collected in a cosmetic internet shopping mall.

• 대한산업공학회지
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• 제36권3호
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• pp.146-153
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• 2010

The purposes of this are (1) to present representative five hand dimensions by measurement year, (2) to investigate hand characteristics based on relative ratios of varying hand dimensions and (3) to compare Korean hand dimensions to other countries' data. Comparing to those of 1979, statures of 2004 increased by 3.0~3.5%, while males' hand dimensions of hand length, medius finger length, hand circumference, hand breadth and hand thickness decreased by 2.0~5.0%. Ratios of hand dimensions to those of medius finger were not significantly different depending upon age group and gender, but were significantly different depending upon races of Korean and American. Hand lengths of Koreans were shorter by about 4.0% than those of Japanese irrespective of gender, while the other compared dimensions for Koreans were larger than those of Japanese. Hand dimensions used in this study of Koreans were generally smaller that those of Americans. It is recommended from this study that when designing hand relevant things including glove, computer keyboard, smart phone key pad, etc., the different hand characteristics found in this study be fully reflected to develop competitive products.

• 패션비즈니스
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• 제25권4호
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• pp.151-160
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• 2021

The purpose of this study was to investigate whether there were improvements on balance when both ankle-jointed calf muscles and hip muscles, which affect balance capabilities, were activated through taping techniques and EMS. In this study, the One Leg Standing Test, a static balance test, was conducted by experimenting on a flat floor, foam pad, and a stretching board with a gradient of 20 degrees, respectively, to study static balance capabilities in different situations. Nine healthy men in their 20s were measured five times every five minutes considering muscle fatigue, and the difference between each variable was analyzed through post-test using nonparametric statistical analysis. Our results showed an equal increase in static balance capability was similar when EMS was applied only to calf muscles and only to hip muscles. Notably most improvements were seen when wearing calf supporters and taping technology pants, and applying EMS together. It was also found that the difference between EMS electric stimulation and balance capability was greater when wearing and applying supporters and taping technology pants. Based on the results of the present study, a muscle support band and EMS of taping techniques can improve balance capabilities. These findings are expected to form a basis for solutions Improving the balance capabilities