• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.709-711
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• 2004

본 논문은 3차원 상에서 사용자의 동작을 관성센서로 입력받아 제스처를 인식하는 시스템을 소개한다. 사용자가 취한 제스처 동작은 관성 센서를 통하여 각속도 및 가속도 신호열로 변환된다. 궤적 추정 알고리즘은 이를 2차원 상의 동작 궤적으로 변환한다. 인식 알고리즘은 이 동작 궤적을 입력받아 베이지안 네트웍에 기반한 제스처 모델들로부터의 likelihood를 계산한 후, 최대 likelihood를 갖는 모델을 선택하여 인식을 수행한다. 16명의 필자로부터 13개의 제스처 동작을 각 24회씩 수집하여 실험한 결과 평균 99.4%의 인식률을 얻었다.

• Horticultural Science & Technology
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• v.30 no.1
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• pp.6-12
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• 2012

Early growth, pigmentation, protein content, and phenylalanine ammonia-lyase (PAL) activity of red curly lettuces (Lactuca sativa L.) grown under different lighting conditions were investigated. Fluorescent lamps (control), blue, red, and blue plus red light-emitting diodes (LEDs) were used as light sources for 10 days. An equal proportion (1:1) of blue and red LEDs was used in the mixed radiation condition. Compared with the control, monochromic red or blue lighting increased fresh and dry weights of 'Ttuksum' and 'Jaju' lettuces. Anthocyanin synthesis was also significantly promoted by the mixed radiation of blue and red LEDs. The mixed radiation also increased the protein content and PAL enzyme activity of 'Ttuksum' leaves by about 200% compared to other treatments. Anthocyanin content was the highest in lettuces subjected to the mixture radiation of blue and red light treatment, while anthocyanin synthesis was inhibited by monochromic red light. The results of the present study indicate that growth and pigment synthesis in lettuces are significantly enhanced by exposure to mixed radiation from blue and red LEDs.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.38 no.3
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• pp.237-245
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• 2012

Coumestrol is one of phytoalexins synthesized in response to environmental stress, and commonly found in natural foods such as alfalfa sprouts, clovers, and soybean. In the present study, we investigated the mechanism underlying protective effect of coumestrol against UVB-induced photoaging in human dermal fibroblasts. We found that pretreatment with coumestrol enhanced the UVB-suppressed mitochondrial biogenesis through regulation of Sirt1 expression and activity, and its downstream gene regulation such as PGC-$1{\alpha}$, NRF1, and TFAM. Moreover, the ATP and ROS production was restored to normal status and the formation of advanced glycation endproducts leading to skin photoaging in skin fibroblasts was blocked by coumestrol pretreatment before UVB irradiation. These findings indicate that coumestrol might potentially prevent skin photoaging induced by mitochondrial damage and glycated protein production in dermal fibroblasts.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.684-691
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• 2006

As many functionalities such as cameras and MP3 players are converged to mobile phones, more intuitive and interesting interaction methods are essential. In this paper, we present applications and their enabling technologies for gesture interactive cell phones. They employ gesture recognition and real-time shake detection algorithm for supporting motion-based user interface and entertainment applications respectively. The gesture recognition algorithm classifies users' movement into one of predefined gestures by modeling basic components of acceleration signals and their relationships. The recognition performance is further enhanced by discriminating frequently confusing classes with support vector machines. The shake detection algorithm detects in real time the exact motion moment when the phone is shaken significantly by utilizing variance and mean of acceleration signals. The gesture interaction algorithms show reliable performance for commercialization; with 100 novice users, the average recognition rate was 96.9% on 11 gestures (digits 1-9, O, X) and users' movements were detected in real time. We have applied the motion understanding technologies to Samsung cell phones in Korean, American, Chinese and European markets since May 2005.

• Journal of Digital Contents Society
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• v.9 no.1
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• pp.101-107
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• 2008

The level of transference of NGN is beginning as the operation of Access Gateway in korea at present, but NGN will keep developing continuously to the NGN integrated network until 2010. This research is finding the meaning and assignment of NGN QoS to deduct how to manage the control system and presenting the QoS control process and trial framework. The trial framework is the modeling of the QoS measurement metrics, the measurement time schedule, the section, hierarchy, instrument, equipment and method of measurement and the series of cycle & the methodology about analysis of the result of measurement. The objective standard of quality in communication service is guaranteed not by itself but by controlling and measuring continuously. Especially it's very important time to maintain the research about NGN QoS measurement and control because the big conversion of new network technology paradigm is now spreading.

• Journal of Digital Convergence
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• v.10 no.2
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• pp.47-53
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• 2012

Economic crisis, efforts to overcome the digital content industry development at home and abroad have been racing in the country's future lies in the digital content industry. Therefore, the digital content industry through vision, model identification knowledge-based global digital content market-based deployment is required. For research purposes the digital content industry to derive an alternative to national industrial development that will lay the groundwork. The deployment order for the first digital content industry, SWOT analysis performed to derive the Korean-specific model. As a result, measures based on the advancement of digital content industry as a long-term vision and specific goals are presented as staged. The age of convergence of the u-media content markets in government, corporations, consumers, and these form the structure of a virtuous cycle distribution systems for energy by being active, synergistic effects are obtained. Above all, based on the content industry to secure internal and external growth is key. Vision of the digital content, the growth momentum of the national social development policies to be used as a role model by changing the way a series of courses is required.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.37 no.2
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• pp.68-78
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• 2000

This paper suggests a new map-matching algorithm for matching traveling trace of vehicle, which is measured by GPS receiver, to the road of a digital map This eventually brings the Improvement of positioning accuracy of the vehicle with GPS receiver After representing the travelling vehicle's motion by state equations using Singer's model, the proposed map-matching algorithm places the position of a vehicle right on the road and also improves the positioning accuracy of the vehicle using a Kalman filter In the crossroad, since it is difficult to determine precisely a current travelling road, we take linear regression to the estimated values from Kalman filtering This gives the direction angle of turning vehicle, then we can determine the correct route direction after comparing with each route-direction angle at the intersection.

• Journal of the Microelectronics and Packaging Society
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• v.11 no.3 s.32
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• pp.77-82
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• 2004

In this paper, warpages of heterogeneous LTCC substrates comprised of high K/low K hi-layered structure were investigated. The effect of glass content in high K LTCC layer on the warpage of substrate during co-firing process was examined. Shrinkage and dielectric properties of high K and low K green sheets were measured. In-situ camber observation by hot stage microscopy showed different camber development of heterogeneous LTCC substrates according to glass content in high K green sheet. High K green sheet containing $50\%$ glass was matched to low K green sheet in the shrinkage. Therefore, LTCC substrate of Low K/High K+$50\%$ glass structure showed flat surface after sintering.

• Journal of The Korean Association For Science Education
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• v.24 no.2
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• pp.343-356
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• 2004

The study aimed to assess the effectiveness of Korea-Israel science teachers inservice program. Thirty science teachers who participated in the inservice program responded to pre- and post tests of the survey instrument on (a) their perceptions to creativity fostering science education and understandings of current education status and reform movement, (b) degrees of changes about understanding of creativity and implementing teaching methods for fostering creativity before and after the program, and (c) their evaluative opinions on the program. Suggestions for improving the program were proposed as follows: First, a pre-service workshop for the program should be provided in order to clearly realize the essential purpose of the program through increase of participating teachers' understanding of facing conditions of education, school policy, reform movement toward science education fostering creativity. Second, for the content of the program, creativity is more emphasized. Appropriate content and sufficient time arrangement for creativity will develop teachers' conceptual understanding of creativity in depth. Third, classroom observation of exemplary science teaching for fostering creativity should be sufficiently arranged. Fourth, amount of content and time allotment to Israel culture, religion, and education system should be reduced.

• Korean Journal of Medicinal Crop Science
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• v.23 no.6
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• pp.480-488
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• 2015

Background : In order to determine the effects of planting methods on root growth of ginseng varieties, two different methods, direct seed sowing and transplanting were compared in terms of their effects on different root growth characteristics. Methods and Results : Higher fresh root weight was observed in ginseng grown by direct seed sowing. Direct seed sowing of three cultivars (Sunhyang, Chungsun and K-1) resulted in higher yield, whereas no difference was observed in the yield of one cultivar (Chungsun). Gumpoong was highly tolerant to physiological stress, as it showed fewer symptoms of rusty and rough skin root diseases in both direct seed sowing and transplanting. The average main root length per total root length of ginseng grown by direct seed sowing was 33.6%, whereas that of ginseng grown by the average of those by transplanting was 22.4%. Other root growth characteristics, including root length, main root diameter, and number of side roots, improved when the direct seed sowing method was used. Conclusions : To our knowledge, this is the first study reporting the differences in root growth parameters of ginseng varieties grown by direct seed sowing or transplanting at the same planting density. Because of the advantages of direct sowing during ginseng planting, developing new varieties and improving cultivation methods are imperative.