• 방송공학회논문지
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• 제14권6호
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• pp.769-782
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• 2009

본 논문은 3차원 입체효과를 나타내는 기술 중 가장 널리 쓰이고 있는 스테레오스코픽 영상을 방송 환경에서 활용되어지고 있는 MPEG-2 전송스트림(Transport Stream : TS)을 통해 효율적으로 서비스를 하기 위한 방법을 제안한다. 전통적인 MPEG-2 전송 스트림은 오디오, 비디오, 그리고 부가 데이터로 구성된 프로그램들을 각 데이터간의 동기 및 타이밍 기능을 제공하고 다중화함으로써 오디오, 비디오 및 데이터의 실시간 전송을 가능하게 한다. 그러나, 이러한 MPEG-2 전송스트림은 2D 영상을 기준으로 제정된 기술 규격으로 스테레오스코픽 영상을 위한 동기화, 다중화 처리 및 스테레오스코픽 동영상 식별이 어렵기에 스테레오스코픽 영상 서비스로 활용하기에는 어려움이 존재한다. 본 논문에서는 전통적인 MPEG-2 전송스트림의 2D 비디오 서비스와 호환성을 가지며 스테레오스코픽 비디오 서비스를 제공할 수 있도록 스테레오스코픽 비디오의 식별, 다중화 처리 및 동기화 처리를 위한 알고리듬을 제시하고 실제 구현을 통해 검증하였다.

• 건축역사연구
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• 제3권1호
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• pp.83-99
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• 1994

Ch'ang-Ts'al-Ts'un is a rural Village near Lung-jing City in Yen-pien Korean Autonomous Province of China. It was formed about 100 years ago by Korean Immigrants and has been developed maintaing the characteristics of traditional Korean architecture. Therefore investigating the spatial structure of this village is a meanigful work to confirm and explore one branch of Korean architecture. This study aims at analyzing the spatial structure of the village using direct data collected from the field work and indirect data from books and maps. The field work consists of on-the-site survey of the village layout, interviews of residents, observation notes and photography. Ch'ang-Ts'ai-Ts'un is located 360-370 m high above the sea level and at the side of a long valley. A river flows in the middle of the valley and relatively flat arable land exists at the both sides of the river. The location of the village related to the surrounding river and mountains suggests that the site of the village was chosen according to Feng-Shui, Chinese and Korean traditional architectural theory. The main direction of the house layouts is South-western. The village has been growing gradually until today. Therefore it is meaningful to make the village layout before Liberation(1946 A.D.) because the characteristics of Korean architecture prevailed more in that period. The area of the previous village is limited to the west side of the creek. New houses were later added to the east of the creek, forming a 'New Village'. Previously the village was composed of 3 small villages: Up, Middle and Down. Also the main access roads connecting the village with the neighboring villages were penetrating the village transversely. Presently the main access road comes to the village longitudinally from the main highway located in front of the village. The retrospective layout shows the existence of well-formed Territory, Places and Axes, thus suggesting a coherent Micro-cosmos. The boundary of imaginery territory perceived by present residents could be defined by linking conspicous outside places sorrounding the village such as Five-mountains, Front-mountain, Shin-dong village, Standing-rock, Rear-mountain and Myong-dong village. Inside the territory there are also the important places such as Bus-stop, Memorial tower of patriots, Road-maitenance building and the village itself. And inside it 5 transverse and 1 longitudinal axes exist in the form of river, roads and mountains. The perceived spatial structure of the village formed by Places, Axes and Territory is geometrical and well-balanced and suggests this village is fit for human settlement. The administrative area of the village is about 738 ha, 27 % of which is cultivated land and the rest is mountain area. Initially the village and surrounndings were covered with natural forest But the trees have been gradually cut down for building and warning houses, resulting in the present barren and artificial landscape with bare mountains and cultivated land. At present the area of the village occupied by houses is wedge-shaped, 600 m wide and 220 m deep in its maximum. The total area of the village is $122,175m^{2}$. The area and the rate of each sub-division arc as follow. 116 house-lots $91,465m^{2}$ (74.9 %) Land for public buildings and shops $2,980m^{2}$ (2.4 %) Roads $17,106m^{2}$ (14.0 %) Creek $1,356m^{2}$ (1.1 %) Vacant spaces and others $9,268m^{2}$ (7.6 %) TOTAL $122,175m^{2}$ (100.0 %) Each lot is fenced around with vertical wooden pannels 1.5-1.8 m high and each house is located to the backside of the lot. The open space of a lot is sub-divided into three areas using the same wooden fence: Front yard, Back yard and Access area. Front and back yards are generally used for crop-cultivation, the custom of which is rare in Korea. The number of lots is 116 and the average size of area is $694.7m^{2}$. Outdoor spaces in the village such as roads, vacant spaces, front yard of the cultural hall, front yard of shops and spacse around the creek are good 'behavioral settings' frequently used by residents for play, chatting, drinking and movie-watching. The road system of the village is net-shaped, having T-junctions in intersections. The road could be graded to 4 categories according to their functions: Access roads, Inner trunk roads, Connecting roads and Culs-de-sac. The total length of the road inside the village is 3,709 m and the average width is 4.6 m. The main direction of the road in the village is NNE-SSE and ESE-WNW, crossing with right angles. Conclusively, the spatial structure of Ch'ang-Ts'ai-Ts'un village consists of various components in different dimensions and these components form a coherent structure in each dimension. Therefore the village has a proper spatial structure meaningful and appropriate for human living.

• 월간양계
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• 제41권2호
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• pp.126-131
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• 2009

• 한국식품영양과학회지
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• 제46권3호
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• pp.394-399
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• 2017

플라스틱 포장 폐기물로 인한 환경오염을 해결하기 위한 대안으로 생분해성 필름이 많이 연구되어 왔다. 본 연구에서는 우럭 껍질 젤라틴(RFG)과 nano-clay(Cloisite $Na^+$, 10A)의 복합필름의 특성에 관하여 연구하였다. 우럭 껍질로부터 젤라틴을 추출하여 sorbitol을 가소제로서 첨가한 단백질 필름을 제조하였고, 제조된 RFG 필름의 tensile strength(TS), water vapor permeability(WVP), water solubility(WS)는 각각 15.0 MPa, $2.70{\times}10^{-9}g\;m/m^2\;s\;Pa$, 53.8%였다. RFG에 nano-clay를 첨가한 복합필름은 TS가 증가하고 WVP와 WS는 감소하였다. XRD 분석과 SEM 측정 결과를 통하여 RFG/nano-clay 복합필름 내부에 박리형 구조를 형성함을 확인할 수 있었다. 결론적으로 본 연구 결과 RFG/nano-clay 복합필름은 생분해성 포장재로 적용될 수 있음을 시사한다.

• 수산해양기술연구
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• 제51권3호
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• pp.295-301
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• 2015

Target strength (TS) information is an important parameter that estimates the detection, distribution, and abundance of Aurelia aurita. In order to investigate the biological TS of jellyfish, some factors such as size (bell diameter), tilt angle, pulsation, and symbion should be known. In the ex situ TS measurements, the tilt angles and pulsation from synchronized swimming behavior of four live A. aurita (bell diameters in the air: 54.2 ~ 94.2 mm) were measured with the acoustic data at 70 kHz. The reduced target strength (RTS) of A. aurita was found to change ranged from 13.4 ~ 16.5 dB according to the incidence angles from $-30^{\circ}$ to $24^{\circ}$. When the change rate of bell diameter in the water was 0.2, the TS value showed a 7.2 dB change. These results could be utilized as an important data to understand the acoustic characteristic scattering of A. aurita.

• 한국통신학회논문지
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• 제27권10C호
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• pp.963-972
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• 2002

DMT 기반의 VDSL 모뎀, OFDM 방식의 DVB 모뎀 등 다중 반송파 변조 시스템에서 핵심 블록으로 사용되는 8192점 FFT/IFFT 프로세서를 설계하였다. 새로운 2단계 수렴 블록 부동점 (two-step convergent block floating-point; TS_CBFP) 스케일링 방법을 제안하여 설계에 적용하였으며, 이를 통해 FFT/IFFT 출력의 신호 대 양자화 잡음 비 (signal-to-quantization-noise ratio; SQNR)가 크게 향상되도록 하였다. 제안된 TS_CBFP 스케일링 방법은 별도의 버퍼 메모리를 사용하지 않아 기존의 방법에 비해 메모리를 약 80% 정도 감소시키며, 따라서 칩 면적과 전력소모를 크게 줄일 수 있다. 입력 10-비트, 내부 데이터와 회전인자 14-비트, 그리고 출력 16-비트로 설계된 8192점 FFT/IFFT 코어는 약 60-㏈의 SQNR 성능을 갖는다. 0.25-$\mu\textrm{m}$ CMOS 셀 라이브러리로 합성한 결과. 약 76,300 게이트와 390K 비트의 RAM, 그리고 39K 비트의 ROM으로 구현되었다. 시뮬레이션 결과, 50-MHzⓐ2.5-V로 안전하게 동작할 것으로 평가되었으며, 8192점 FFT/IFFT 연산에 약 164-$\mu\textrm{s}$가 소요될 것으로 예상된다. 설계된 코어는 Xilinx FPGA에 구현하여 정상 동작함을 확인하였다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.157-160
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• 2004

본 논문은 미국 차세대 디지털 케이블 방송 표준 규격인 오픈케이블($OpenCable^{TM}$)의 수신제한 모듈인 CableCard의 Physical Layer를 SystemC의 TLM(Transaction Level Modeling)과 RTL(Register-Transfer Level) 모델링 기법으로 설계하였다. 본 논문에서 설계한 CableCard의 Physical Layer는 PCMCIA Interface, Command Inteface 그리고 MPEG-2 TS Interface 로 구성된다. CableCard가 전원이 인가될 때, 카드 초기화를 위하여 동작하는 PCMCIA 인터페이스는 16 비트 PC 카드 SRAM 타입으로 2MByte Memory와 100ns access time으로 동작할 수 있게 설계하였다. PCMCIA 카드 초기화 동작이 완료된 후, CableCard의 기능을 수행하기 위하여 두 개의 논리적 인터페이스가 정의되는데 하나는 MPEG-2 TS 인터페이스이고, 다른 하나는 호스트(셋톱박스)와 모듈 사이의 명령어들을 전달하는 명령어 인터페이스(Command Interface)이다. 명령어 인터페이스(Command Interface)는 셋톱박스의 CPU와 통신하기 위한 1KByte의 Data Channel과 OOB(Out-Of-Band) 통신을 위한 4KByte의 Extended Channel 로 구성되고, 최대 20Mbits/s까지 동작한다. 그리고 MPEG-2 TS는 100Mbits/s까지 동작을 수행할 수 있게 설계하였다. 설계한 코드를 실행한 후, Cadence사의 SimVision을 통해서 타이밍 시뮬레이션을 검증하였다.

• Tuberculosis and Respiratory Diseases
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• 제67권3호
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• pp.191-198
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• 2009

Background: Pemetrexed, a multi-targeted antifolate has been used as a second line treatment against non-small cell lung cancer (NSCLC). We aimed to clarify the efficacy and survival according to line of treatment, histologic type, and expression of thymidylate synthase (TS). Methods: Ninety-eight patients were treated with pemetrexed as a second line treatment (n=43) or as an additional course of treatment (n=55). TS expression was studied with immunohistochemistry and graded as 0 to 3 based on the extent of expression. Results: The response rate (RR) in 98 subjects was 10.2% and the disease control rate (DCR=PR+SD) was 30.6%. RR and DCR were 12.7% and 32.7% in non-squamous cell carcinoma (NSQC) compared to 7.0% and 27.9% in squamous cell carcinoma (SQC) (p>.05). No significant differences in RR and DCR were observed between a second line group (4.7%, 20.9%) and a further line group (14.5%, 38.2%). A similar trend was observed in the 88 response evaluable subjects. TS was expressed in 28.6% (grade 1), 24.5% (grade 2) and 7.1% (grade 3), respectively, and it was not expressed in 39.8% of subjects. TS expression rate was significantly higher in the SQC (72.1%) compared to NSQC (50.9%, p=0.033). However, the efficacy of pemetrexed was not significantly different by the extent of TS expression. Conclusion: Pemetrexed showed efficacy, not only in a second-line setting, but also in further lines of treatment for NSCLC. The efficacy of pemetrexed tended to be higher in patients with NSQC compared to SQC. TS expression rate was significantly higher in SQC compared to NSQC.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2000년도 High Temperature Superconductivity Vol.X
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• pp.132-135
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• 2000

Magneto-resistances of the YBa$_2$Cu$_3$O$_{7-{\delta}}$ based coated conductors fabricated on the tilted single crystalline Ni substrates and RABiTS (rolling assisted bi-axially textured substrate) were measured under various magnetic fields. The activation energies of vortices were estimated from them by fitting equation of p = p$_o$ exp(-U(H,T)/k$_B$T). When currents flew in the rolling direction for the case of the tilted single crystalline YBCO on the RATS, the activation energies were similar to those of c-axis normal YBCO films on the SrTiO$_3$ single crystal substrates [5] and were slightly larger than those of the RABiTS coated conductors. On the contrary, for the currents flowing in the transverse direction, the magnetoresistances show double transitions in the temperature with much smaller activation energies.

• 연구논문집
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• 통권30호
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• pp.67-77
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• 2000

This study was performed to investigate the characteristics and performance of model Decanter for separating swine wastewater to solid and liquid which is slurry state with 12.6% TS. Swine wastewater of the slurry tank was pumped into model Decanter which capacity was $2m^3$/hr in 10% TS Slurry inside of bowl was separated to solid-liquid by centrifugal acceleration. Sampling was done in the section of slurry feed pipe, supernatant outflow pipe, cake discharge pipe. After solid-liquid separation TS, $COD_cr$ and slurry volume reduction effect represented 38%, 40%, 19.6% respectively. Relation factor of model Decanter operation slurry concentration, optimum retention time of slurry, overflow velocity of supernatant, supernatant concentration, sludge removal rate etc. Optimal operation conditions can be set and evaluated efficiency based on the experimental results in the case of Decanter adopted for solid-liquid separation in highly concentrated swine wastewater.