• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.28 no.9A
• /
• pp.746-753
• /
• 2003

In this paper, we propose an efficient algorithm for non-streaming synchronized data processing based on ATSC-DASE in terrestrial digital data broadcasting services. Non-streaming synchronized data is encapsulated in DSM-CC sections with PTS(presentation time stamp) values associated with A/V and it is transmitted in a form of MPEG-2 TS(transport stream). At the receiver, the transmitted A/V data are processed by PC based set-top box(STB) in real-time, and the transmitted non-streaming synchronized data is also stored at the STB and is displayed at right time by the proposed algorithm. To verity the proper operation of the proposed algorithm, we make a scenario for non-streaming synchronized data by XML, and finally we are able to display it properly by using declarative application(DA) browser.

• Journal of Broadcast Engineering
• /
• v.7 no.2
• /
• pp.88-95
• /
• 2002

According to an evolution of digital broadcasting, it is possible that terrestrial and satellite broadcasting media provide multi-channel services. CATV and satellite media have been also extended to hundreds of channels. As the result of channel expanding, viewers came to select lots of channels. But it is difficult that they select the favorite channel among hundreds of channels. In this paper, we propose an efficient automatic method to recommend channels and programs on a viewer's preference in a multi-channel broadcasting receiver like a Set ToP Box(STB). The proposed algorithm selects channels based on the following method. It makes and saves user history data by using MPEG-7 MDS based on the program information a viewer had watched. It recommends programs similar to a viewer's preference based on user history data. It selects the channel in the recommended genre based on the viewer's channel preference. The experimental result shows that the proposed scheme is efficient to select the user preference channel.

• Asian-Australasian Journal of Animal Sciences
• /
• v.27 no.3
• /
• pp.431-438
• /
• 2014

The study was carried out in order to verify the effects of piglets' weight at birth on their surface temperature change (ST) after birth, and its relationship with ingestion time of colostrum. Piglets from four different sows were weighed at birth and divided into a totally randomized design with three treatments according to birth weight (PBW): T1 - less than 1.00 kg, T2 - 1.00 to 1.39 kg, and T3 - higher than or equal to 1.40 kg. The time spent for the first colostrum ingestion was recorded (TFS). Images of piglets' surface by thermal imaging camera were recorded at birth (STB) and 15, 30, 45, 60, and 120 min after birth. The air temperature and relative humidity were recorded every 30 min and the indexes of temperature and humidity (THI) were calculated. A ST drop after 15 min from birth was observed, increasing again after sixty minutes. Positive correlations were found between the PBW and the ST at 30 and 45 min after birth. The PBW was negatively correlated with the TFS. The THI showed high negative correlations (-0.824 and -0.815) with STB and after 15 min from birth. The piglet's surface temperature at birth was positively correlated with temperature thereof to 15 min, influencing therefore the temperatures in the interval of 45 to 120 min. The birth weight contributes significantly to postnatal hypothermia and consequently to the time it takes for piglets ingest colostrum, requiring special attention to those of low birth weight.

• Toxicological Research
• /
• v.16 no.2
• /
• pp.101-107
• /
• 2000

Cannabidiol derivatives (1, 2 and 3), 5-fluorouracil (4, 5-FU) and adriamycin (5, AM) were tested for their growth inhibitory effects against human tumor cell lines using two different 3-{4,5-dimeth-ylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay and sulforhodamine B protein (SRB) assay. The light microscopic study showed morphological changes of the treated cells. Disruptions in cell organelles were determined by colorimetric methods; MTT assay and STB assay. These results suggest that cannabidiol (1, CBD) retains the most growth-inhibitory activity against human tumor cell lines.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.24 no.2 s.173
• /
• pp.448-454
• /
• 2000

This study was undertaken to investigate tribological characteristics with atmospheric pressure for three alumina ceramics of different purity, such as, 85 %, 95 % and 99.7 %. The wear test was carried out using the wear test device which was designed for this study in air, $10^-2$ Torr and $10^-4$ Torr. The friction coefficient depends entirely on atmospheric pressure and alumina with lower purity than higher purity has been much affected by heat accumulation. The friction surface of ceramics have been protected in the air by the influence of the oxides transferred from STB2. However, the protective layer can not be formed due to the decrease of oxygen in vacuum.

• Journal of Bio-Environment Control
• /
• v.14 no.3
• /
• pp.190-195
• /
• 2005

This research was conducted to investigate the changes in soil chemical properties of root media as influenced by incorporation rate of a polyacryl amide hydrogel, Stocksorb C. The pH at 5 weeks after treatment in four root media such as peatmoss + vermiculite (1:1, v/v; PV), peatmoss + composted rice hull (1:1; PR), peatmoss + composted saw dust (1:1; PD) and peatmoss + composted pine bark (1:1; PB) containing STSB were in the range from 7.04 to 7.30, which was too high. Elevated incorporation rate of STSB resulted in increase of EC in soil solution of four root media with linear and quadratic response. The concentrations of $NH_4^+-N,\;NO_3^--N,\;PO_4-P^{3-},\;K^+,\;Ca^{2+}and\;Mg^{2+}$ in four kinds of root media increased as incorporation rates of STSB were elevated. But the $NO_3^-$-N concentrations in PS media were lower than those in other there root media tested. The Fe concentrations in PV, PR and PS media increased as incorporation rates of STSB were elevated, but those in PB medium did not show significant different. The concentrations of $Fe^{2+},\;Mn^{2+},\;Zn^{2+}and\;Cu^{2+}$ in PS media were higher than those in other three root media.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
• /
• 2003.10a
• /
• pp.35-40
• /
• 2003

본 연구에서는 취성재료이면서, 세라믹과 유사한 성질을 가지며 내부균열관찰이 용이한 상업용 유리의 표면에 세라믹 플라즈마 용사 코팅한 후 입자 충격시험을 실시하였다. 코팅분말로는 매마모성 및 내충격성이 우수하여 산업계에서 널리 사용되고 있는 $Al_{2}O_{3}$ 분말을 사용하였으며, 충격입자로는 고경도의 STB2 볼베어링강을 사용하였다. 공기압축기를 장착한 입자 충격시험기를 이용하여 강구입자 충격시험을 실시한후, 실체현미경을 이용하여 손상정도를 분석하였다. 그리고 코팅입자의 크기 및 기공율에 따른 손상 정도를 분석 방법에 따라 손상정도를 비교${\cdot}$검토하였다.

• Journal of the Korean Society for Precision Engineering
• /
• v.19 no.2
• /
• pp.58-64
• /
• 2002

In these days, according to increasing the technical development, the dimension of a product goes up for ultra-precision. For the net shape manufacturing, grinding is a important process that influences directly the accuracy and the integrity of produced products. In this study, an experimental evaluation was carried out. Workpiece materials were used STD11, SUS304, and STB2 in accordance with varing condition of feedrate and depth of cut. From measuring the grinding force and the surface roughness, material characteristics of grinding by using CBN wheel were examined.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
• /
• 1997.04a
• /
• pp.33-40
• /
• 1997

This study was undertaken to investigate tribology characteristics of the alumina ceramics($Al_2O_3$) for the vauiation of ambient condition such as air and distilled water. The results obtained were as follows. As the sliding speed increases, the friction coefficient in the air decreased due to the reduction of sheafing stress caused by the heat accumulation of contact interface. And the friction coefficient in the distilled water decreased due to an activation of the tribochemical reaction. As the contact load increases, the friction coefficient is small in the air due to temperature rise of the contact interface. However, at the low speed side in the distilled water, the friction coefficient holds a large value due to decrease of the tribochemical reaction. The friction surface of ceramics can be protected in the air by the influence of the oxides tansfered from STB2 and also in the distilled water by the influence of the corrosive productive hydroxides.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2012.11a
• /
• pp.195-198
• /
• 2012

IPTV는 방통융합의 대표적인 매체로 자리 매김하며 2008년 상용서비스를 시작으로 계속 진화하고 있다. 그러나, 초기 서로 다른 방식으로 IPTV 서비스를 시작함으로 인해 상호운용성 문제가 대두 됨에 따라, TTA를 통해 IPTV 분야의 표준화가 시작되어 현재도 다양한 IPTV 분야의 기 제정된 표준의 개정 작업 및 신규 분야의 표준화를 계속 추진하고 있다. 이렇듯 표준화가 진행됨에 따라, IPTV 단말의 사업자 간의 이동성을 보장하기 위한 노력이 계속되고 있으며, 그 중 하나로 IPTV 단말 프로비저닝 절차 표준화가 추진되어 현재까지 2번의 개정 작업을 통해 표준안의 보완/수정 작업 등이 진행되어 2차 개정판이 완료되었다. 이에 TTA에서는 해당 표준을 구현한 STB 등 단말과 서버에 대한 표준적합성 시험을 위한 시험규격을 개발하였다. IPTV 단말 프로비저닝 절차 표준에서는 단말의 네트워크 접속부터 펌웨어/소프트웨어 업그레이드, IPTV 서비스를 탐색하기 위한 정보 전달을 위한 절차를 정의하고 있으며, 각 절차별 데이터 형식 및 프로토콜을 검증하기 위한 시험항목을 개발하였으며, 표준안 검증 및 시험 서비스 제공을 위한 시험환경을 구축하였다.