• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.22 no.1
• /
• pp.38-46
• /
• 2011

In this paper, we propose a calculation methodology of the service distance to assure the satisfactory quality of service for analogue and digital TV receivers. Using the field strength formulation for TV receiver based upon Rec. ITU-R P.1546, computational results are presented and discussed for both systems, and some important factors are reviewed in terms of the equivalent level of service, which must be kept due to ATV to DTV conversion. The presented method provides the predicted values of field strength at receiver areas to check whether transmission quality can be satisfied or not, and it can be also used for obtaining the protection ratio or separated distance from co-channel or adjacent interference signal.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.23 no.8
• /
• pp.923-933
• /
• 2012

In this paper, we propose the technical considerations for the rules on television white space(TVWS), that becomes a center of public notice, in terms of incumbent services protection, technical requirements of television band devices (TVBDs) and administration of TV band databases. The basic idea behind the proposed method is based on the perfect protection of incumbent services such as digital television and wireless microphone. It has been found that FCC's approach has the advantage that a list of available channels and transmission power are provided for TVBDs faster than Ofcom's approach that requires DB to perform the algorithm for determining frequencies and transmission power for TVBDs everytime DB is asked from TVBDs.

• Journal of Broadcast Engineering
• /
• v.23 no.6
• /
• pp.824-835
• /
• 2018

In this study, the impact on the number of cable TV subscribers as well as the profit of cable TV has been examined, and the impact on enlarging the digital broadcast viewing rights of cable TV subscribers and viewers' welfare has also been examined. We investigated the trends in the number of analog and 8VSB subscribers and revenue of cable TV operators by region and analyzed based on changes in the number of channels provided by each operator. The results show that analog subscribers and digital subscribers are delaying their departure through 8VSB conversion, and VOD subscription fees and home shopping transmission fees have a significant impact on operating profit. Subscribers, as they switched over to 8VSB, have become able to view channels of various genres with clear picture quality for a same subscription fee, and the program providers could offer programs to more customers. The government's deregulation policy due to the changes in broadcasting environment led to the facilitation of digital conversion of Pay-TV and improvement of viewers' welfare.

• Journal of the Korean Wood Science and Technology
• /
• v.50 no.3
• /
• pp.159-166
• /
• 2022

CO₂ emissions are the primary reason for global warming; hence, biological and chemical technologies for converting CO₂ into useful compounds are being actively studied. Biological methods using enzymes can convert CO₂ under mild conditions. Formate dehydrogenase (FDH) is a representative CO₂ conversion enzyme. Its function was revealed after isolation from bacteria, yeast, and plants. In this study, we evaluated the CO₂ conversion potential of FDH isolated from wood-rotting fungi. After isolating the FDH gene (TvFDH) from Trametes versicolor, we cloned the full-length FDH from T. versicolor and expressed it in a cell-free expression system. The gene encoding TvFDH was identified as 1,200 bp open reading frame (ORF) and the expected molecular weight of the protein was approximately 42 kDa. Overexpression of the recombinant crude protein including TvFDH was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Enzyme activities and metabolite analyses confirmed the efficiency of TvFDH for CO₂ reduction.

• Annual Conference of KIPS
• /
• 2011.11a
• /
• pp.161-164
• /
• 2011

무선인터넷의 발달과 스마트 디바이스의 보급이 유비쿼터스 시대를 앞당기고 있다. 스마트 TV와 스마트 에어컨 등 네트워크 기반의 가전 기기들이 등장 하면서 모든 제품들을 네트워크 환경으로 묶어 사용하는 시대가 열린 것이다. 이러한 스마트 기기들이 등장함과 동시에 스마트 폰을 활용하여 유비쿼터스 디바이스를 제어하는 어플리케이션들도 많이 등장하였다. PC를 제어하거나 스마트 TV를 제어하는 어플리케이션은 안드로이드 마켓이나 애플 스토어에서 킬러 앱으로 각광 받고 있다. 그러나 이러한 스마트 디바이스들이 아직은 많이 보급되지 않았다. 아직도 각 가정에서는 스마트 TV가 아닌 보통 TV를 사용하는 경우가 많고, 에어컨의 경우 수명이 더 길어 스마트 에어컨 등이 보급되기 까지는 더욱 더 시간이 걸릴 것으로 보인다. 본 논문에서는 증강현실과 적외선 모듈을 이용하여 유비쿼터스 환경에 포함되지 못한 디바이스들을 스마트 폰으로 제어할 수 있는 AR Remote System을 제안한다.

• Biomedical Science Letters
• /
• v.11 no.1
• /
• pp.15-22
• /
• 2005

Trichomoniasis is a sexually transmitted disease induced by Trichomonas vaginalis, a parasitic protozoan. The symptoms of trichomoniasis are rarely appeared that the infections are distributed worldwide from underdeveloped to developed countries. The diagnosis of trichomoniasis is mainly taken by wet smear following microscopic examination, of which the diagnostic accuracies are poor and varies with the clinicians' experiences. Therefore, more exact and convenient diagnostic methods for T. vaginalis are required. Here, we cloned and expressed recombinant T. vaginalis adhesion protein 33 (rTvAP33) using an E. coli expression system. rTvAP33 was then immunized to rabbit and BALB/c mice for the production of anti-rTvAP33 antibodies. Sandwich ELISA using these antibodies detected T. vaginalis cultured in TYM broth supplemented with ferrous ions. Vagina-parasitizing microorganisms showed low cross-reactivities in this system. These results suggest that Tv AP33 is a good diagnostic target for the detection of TvAP33-expressing T. vaginalis.

• International Journal of Stem Cells
• /
• v.16 no.1
• /
• pp.66-77
• /
• 2023

Background and Objectives: We compared the efficacy and safety of human bone marrow-derived mesenchymal stem cells (hBMSC), delivered at different doses and via different injection routes in an animal model of chronic kidney disease. Methods and Results: A total of ninety 12-week-old rats underwent 5/6 nephrectomy and randomized among nine groups: sham, renal artery control (RA-C), tail vein control (TV-C), renal artery low dose (RA-LD) (0.5×10⁶ cells), renal artery moderate dose (RA-MD) (1.0×10⁶ cells), renal artery high dose (RA-HD) (2.0×10⁶ cells), tail vein low dose (TV-LD) (0.5×10⁶ cells), tail vein moderate dose (TV-MD) (1.0×10⁶ cells), and tail vein high dose (TV-HD) (2.0×10⁶ cells). Renal function and mortality of rats were evaluated after hBMSC injection. Serum blood urea nitrogen was significantly lower in the TV-HD group at 2 weeks (p<0.01), 16 weeks (p<0.05), and 24 weeks (p<0.01) than in the TV-C group, as determined by one-way ANOVA. Serum creatinine was significantly lower in the TV-HD group at 24 weeks (p<0.05). At 8 weeks, creatinine clearance was significantly higher in the TV-MD and TV-HD groups (p<0.01, p<0.05) than in the TV-C group. In the safety evaluation, we observed no significant difference among the groups. Conclusions: Our findings confirm the efficacy and safety of high dose (2×10⁶ cells) injection of hBMSC via the tail vein.

• Science of Emotion and Sensibility
• /
• v.19 no.3
• /
• pp.59-70
• /
• 2016

Qualitative consumption is a trend in the children clothing market and watching TV of childcare-entertainment reality programs are becoming popular. This study examines the watching degree of childcare-entertainment reality TV programs of parent buyer (30s) and potential buyer (20s) and we investigate their shopping orientation of children wear. We did the survey research of 200 consumers with SPSS statistical analysis including the review of internet news, paper, and books on children wear shopping orientation. The results are following: first, the longer the watching time of childcare-entertainment reality TV programs, the higher shopping orientation, such as following the fashion of child stars, and the higher the watching preferences on childcare-entertainment reality programs, the greater shopping orientation in following childcare-entertainment reality programs star when they are purchasing children's clothing. Second, potential consumers as well as parent consumers were affected by watching the childcare-entertainment reality programs. Watching childcare-entertainment reality TV programs could give the impact when they were shopping children's clothing because they wanted to follow the fashion of childcare-entertainment reality programs TV star. Accordingly, the exposure of the childcare-entertainment reality programs for children clothing is found to be positive to the both current and future consumers.

• Journal of Korea Multimedia Society
• /
• v.13 no.12
• /
• pp.1767-1777
• /
• 2010

In digital TV broadcasting, such as terrestrial, cable, satellite, and IPTV, the head-end of digital TV broadcasting has a more complicated transmission structure than that of analog TV broadcasting. Furthermore, digital TV broadcasting has a feature that supports multiplex models, such as Multiple Program Transport Stream (MPTS). Therefore, the purpose of our work was to design and examine a more efficient new system of emergency alert message transmission to support the digital TV broadcasting environments. Digital TV broadcasting is the IP generation or RF transmission of 8-VSB, QAM, and QPSK modulated through a multiplexer or re-multiplexer multiplexed stream as a MPEG-2 Transport Stream after content encoding. The new system proposed in this paper transmits an emergency alert message without scrambling after replacing the PID and payload of the -packet with the message prototype in the TS stream from the multiplexer. If we need to transmit an emergency alert message under digital TV broadcasting services, then the receiver first checks the PID of each packet in the TS stream for the emergency alert message. Next, if a packet is determined to be an emergency alert message, then the set-top box displays the message on the TV screen using its function of On Screen Display, or the PC based software displays the message on the monitor screen using its function of overlay with user interface if the packet is found to be an emergency alert message. We have designed an emergency alert message protocol and a system model. By experiments and analysis of the system, we concluded that the system achieved efficiency and the ability to send and receive emergency alert messages using the system under different digital TV broadcasting service environments.

• Annual Conference of KIPS
• /
• 2006.05a
• /
• pp.403-406
• /
• 2006

최근 시작된 국내 디지털 지상파 방송으로 이제 본격적인 디지털 방송 시대가 열리게 되었다. 디지털 방송 서비스는 다매체, 다채널을 통한 방송 프로그램의 증가와 양방향 TV 방송 서비스로 인해 사용자에게 다양한 방송 프로그램의 선택과 개인별 맞춤형 시청 기회를 제공함으로써 새로운 방송 서비스 환경을 필요로 하게 되었다. 이에 본 논문에서는 맞춤형 DTV(Digital TV) 방송 서비스를 제공하기 위하여 TV-Anytime 영상 메타데이터에 대한 연속 데이터 마이닝 기법을 이용하여 시청 선호도 프로파일을 생성하는 효율적인 기법을 제안한다. 또한, 내장형 운영체제 기반의 사용자 디스플레이 모듈을 제공하며, 실험을 통하여 본 논문에서 제안하는 방법의 효율성을 고증한다.