• ETRI Journal
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• 제25권6호
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• pp.489-502
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• 2003

This paper presents an MPEG-4 video codec, called MoVa, for video coding applications that adopts 3G-324M. We designed MoVa to be optimal by embedding a cost-effective ARM7TDMI core and partitioning it into hardwired blocks and firmware blocks to provide a reasonable tradeoff between computational requirements, power consumption, and programmability. Typical hardwired blocks are motion estimation and motion compensation, discrete cosine transform and quantization, and variable length coding and decoding, while intra refresh, rate control, error resilience, error concealment, etc. are implemented by software. MoVa has a pipeline structure and its operation is performed in four stages at encoding and in three stages at decoding. It meets the requirements of MPEG-4 SP@L2 and can perform either 30 frames/s (fps) of QCIF or SQCIF, or 7.5 fps (in codec mode) to 15 fps (in encode/decode mode) of CIF at a maximum clock rate of 27 MHz for 128 kbps or 144 kbps. MoVa can be applied to many video systems requiring a high bit rate and various video formats, such as videophone, videoconferencing, surveillance, news, and entertainment.

• Asian-Australasian Journal of Animal Sciences
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• 제16권5호
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• pp.702-705
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• 2003

Forest by-product silage (FPS) comprised of foliage, shrubs, and wild grasses was prepared to examine feeding value as sole roughage source for spotted (sika) deer. This diet was compared with imported oak leaf hay (OLH) and a commercial mixed ration (CMR) in digestion balance trials with spotted deer. Dry matter intake was highest (p<0.05) on the OLH, whereas intakes of the FPS and CMR were similar (p>0.05). Digestibility of dry matter was highest (p<0.05) for CMR. Digestibility of crude protein was highest in CMR and lowest in OLH and there were significant differences (p<0.05) among diets. Average daily gain, digestible dry matter intake and digestibility of crude fiber did not differ significantly among diets. Nitrogen intake, urinary and digestible nitrogen were highest (p<0.05) in CMR. However, nitrogen retention was not significantly different. Consequently, FPS is a good roughage source for deer having high digestibility, dry matter intake and availability of nitrogen.

• 대한간호학회지
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• 제18권2호
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• pp.153-161
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• 1988

The purpose of this study was to analyze the level of the services provision of community health practitioners (CHP) and to find out the influence factors on the services provision of CHP. In this study the dependent variables were the level of community health services(CHS), maternal and child health services(MCH), family planning services(FPS), primary care services(PCS) and the ratios of preventive health services(PHS). And independent variables were predisposing, community demographic and task factors. For this analysis, atepwise regression was used. Data collected for the study on reorganization of health centers organization in 1985 was partly used. The findings of this study can be summarized as follows : First, total variance of independent variables for CHS, MCH, FPS, PCS and PHS are shown 62.5 percent, 58.3 percent, 41.8 percent, 17 percent and 61.9 percent respectively. Second, the most important variables which explain CHS, MCH, FPS, PCS and PHS was ratios of household contacted ($R^2$＝0.289), marital status ($R^2$＝0.177), marital status($R^2$＝0.167), ratios of household contacted($R^2$＝0.119) and management of preventive health services($R^2$＝=0.203) respectively. The independent varivbles used in this analysis presented that the explnining for the provision of preventive health service are more influenced than primary care services. In summary this analysis suggests that the level of preventive health services provision of CHP is low and the provision of primary care services compared with preventive health services are occurred independentely. In the future, the strategies for active preventive services by CHP must to be strengthened.

• 한국산업정보학회논문지
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• 제16권4호
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• pp.75-85
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• 2011

게임 출시 이전 적절한 시점에서의 효율적이고 경제적인 게임평가는 게임개발사에겐 매우 중요한 일이다. 본 연구에서는 효율적이고 빠른 게임평가를 위하여 MMORPG, FPS, 웹게임과 같은 대표적 게임 장르에 따라 서로 다른 웹기반 게임평가 모델을 설계하고 이를 시스템으로 구현하였다. 제안한 시스템의 평가모델은 게임성, 경쟁력, 기술력, 수익성, 시장성의 평가 분야로 이루어져 있고, 각 장르별 평가 특성을 반영하기 위하여 공통평가 요소와 장르별 평가 요소로 나뉘어 설계되었다. 제안한 시스템은 게임업체에서 제작중인 2개의 게임에 적용하였으며, 그 결과를 기술한다.

• Nuclear Engineering and Technology
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• 제52권1호
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• pp.109-114
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• 2020

This work presents the results of laboratory scale tests of the CARBOFLUOREX (CARBOnate FLUORide EXtraction) process - a novel technology for the recovery of U and Pu from the solid fluorides residue (fluorination ash) of Fluoride Volatility Method (FVM) reprocessing of spent nuclear fuel (SNF). To study the oxidative leaching of U from the fluorination ash (FA) by Na₂CO₃ or Na₂CO₃-H₂O₂ solutions followed by solvent extraction by methyltrioctylammonium carbonate in toluene and purification of U from the fission products (FPs) impurities we used a surrogate of FA consisting of UF₄ or UO₂F₂, and FPs fluorides with stable isotopes of Ce, Zr, Sr, Ba, Cs, Fe, Cr, Ni, La, Nd, Pr, Sm. Purification factors of U from impurities at the solvent extraction refining stage reached the values of 10⁴-10⁵, and up to 10⁶ upon the completion of the processing cycle. Obtained results showed a high efficiency of the CARBOFLUOREX process for recovery and separating of U from FPs contained in FA, which allows completing of the FVM cycle with recovery of U and Pu from hardly processed FA.

• 한국멀티미디어학회논문지
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• 제22권3호
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• pp.349-356
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• 2019

When a prescription change occurs in the hospital depending on a patient's improvement status, pharmacists directly classify manually returned pills which are not taken by a patient. There are hundreds of kinds of pills to classify. Because it is manual, mistakes can occur and which can lead to medical accidents. In this study, we have compared YOLO, Faster R-CNN and RetinaNet to classify and detect pills. The data consisted of 10 classes and used 100 images per class. To evaluate the performance of each model, we used cross-validation. As a result, the YOLO Model had sensitivity of 91.05%, FPs/image of 0.0507. The Faster R-CNN's sensitivity was 99.6% and FPs/image was 0.0089. The RetinaNet showed sensitivity of 98.31% and FPs/image of 0.0119. Faster RCNN showed the best performance among these three models tested. Thus, the most appropriate model for classifying pills among the three models is the Faster R-CNN with the most accurate detection and classification results and a low FP/image.

• Earthquakes and Structures
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• 제16권6호
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• pp.641-654
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• 2019

This paper investigates the seismic response of a typical non-navigable continuous girder bridge isolated with friction sliding bearings of the Hong Kong-Zhuhai-Macao link projects in China. The effectiveness of the friction pendulum system (FPS) and accuracy of the numerical model were evaluated by a 1/20 scaled bridge model using shaking table tests. Based on the hysteretic properties of friction pendulum system (FPS), double concave friction pendulum (DCFP), and triple friction pendulum system (TFPS), seismic response analyses of isolated bridges with the three sliding-type bearings are systematically carried out considering soil-pile interaction under offshore soft clay conditions. The fast nonlinear analysis (FNA) method and response spectrum are employed to investigate the seismic response of isolated offshore bridge structures. The numerical results show that the implementation of the three sliding-type bearings effectively reduce the base shear and bending moment of the reinforced concrete pier, at the cost of increasing the absolute displacement of the bridge superstructure. Furthermore, the TFPS and DCFP bearings show better isolation effect than FPS bearing for the example continuous girder bridge.

• ETRI Journal
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• 제44권1호
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• pp.62-72
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• 2022

In this study, we propose a multi-GPU-based 8KVR stitching system that operates in real time on both local and cloud machine environments. The proposed system first obtains multiple 4 K video inputs, decodes them, and generates a stitched 8KVR video stream in real time. The generated 8KVR video stream can be downloaded and rendered omnidirectionally in player apps on smartphones, tablets, and head-mounted displays. To speed up processing, we adopt group-of-pictures-based distributed decoding/encoding and buffering with the NV12 format, along with multi-GPU-based parallel processing. Furthermore, we develop several algorithms such as equirectangular projection-based color correction, real-time CG overlay, and object motion-based seam estimation and correction, to improve the stitching quality. From experiments in both local and cloud machine environments, we confirm the feasibility of the proposed 8KVR stitching system with stitching speed of up to 83.7 fps for six-channel and 62.7 fps for eight-channel inputs. In addition, in an 8KVR live streaming test on the 5G MEC/cloud, the proposed system achieves stable performances with 8 K@30 fps in both indoor and outdoor environments, even during motion.

• 한국방사선학회논문지
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• 제7권4호
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• pp.277-284
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• 2013

심혈관 촬영 시 선량감소를 위해 실무자가 조절 가능한 기하학적 특성을 살펴보고, 각 특성에 따른 유효선량을 비교해 보았다. 인체 모형 팬텀을 이용하여 투시촬영과 영화촬영을 시행하였고, 선량의 측정은 심혈관 장치의 DAP meter를 이용하여 DAP 값을 유효선량으로 환산하였다. 먼저 영화촬영은 투시촬영에 비해 기하학적 특성 전반에 걸쳐서 선량이 약 6-7배 높았다. FPS mode에 따른 선량은 FPS를 낮게 설정할수록 선량이 70%까지 감소하였다. 선관 각도에 따른 선량은 LAO $45^{\circ}$+Caudal $30^{\circ}$이 가장 높게 측정되었고, 조사야 조절장치를 많이 적용할수록 선량은 감소하였다. X-선관과 영상증배관의 거리가 10 cm 멀어질수록 투시촬영과 영화촬영에서 각각 선량이 25-35%까지 증가하였다. FOV가 확대될수록 선량이 1.21-2배 증가하였고, 테이블과 영상증배관 거리가 10cm 멀어질수록 선량은 1.11-1.25배 까지 증가하였다. 따라서 본 연구에서 실험한 기하학적 특성인 FPS mode, 선관 각도, 조준기, 선관과 영상증배관 거리, 테이블과과 영상증배관 거리, FOV 영상 확대 등은 중재적 시술 시 실무자가 수시로 조절 가능한 인자이며, 각 특성에 따라 선량 감소 효과를 기대할 수 있다.

• 만화애니메이션 연구
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• 통권41호
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• pp.253-277
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• 2015

2014년 5월 FPS 게임 <울펜슈타인 더 뉴 오더(Wolfenstein The New order), 2014>는 출시된 직후 영국 주간차트 플랫폼 부분에서 상위에 오르는 등 게임유저들의 흥미를 유도하였다. 이러한 세계적 흥행에 대해 Colin Moriarty(2014)는 "나치가 2차 세계대전에서 승리했다면 어떻게 되었을까?" 라는 대체 역사적 서사구성을 구현하였기 때문이라고 하였다. 이에, 본 연구에서는 기존의 전통적인 FPS 게임과는 다른 울펜슈타인의 최신작 <울펜슈타인 더 뉴 오더(Wolfenstein The New order), 2014>를 사례대상으로 하여 대체 역사적 특성이 어떻게 게임 트레일러와 그래픽 디자인 속에서 내재되는지 살펴보는 것을 목적으로 한다. 이를 위해, 첫째, 대체역사의 정의와 등장 배경, 그리고, 소설, 영화, 게임에서 구현된 대체 역사적 특성에 대해 문헌과 사례를 중심으로 고찰한다. 이를 바탕으로 둘째, '대체 역사'의 서사구성에 대해 (1)실제 역사 소재의 차용, (2)실제와 허구 역사와의 연계, (3)재해석을 통한 대체 역사적 변용 등 순차적으로 분류하였다. 셋째, <울펜슈타인 더 뉴 오더, 2014>의 실사영상 게임 트레일러에 대해 3단계 순차적 서사구성을 중심으로 내러티브에 대해 분석하고, 그래픽으로 구현된 게임캐릭터와 배경에 대해 (1)공간적 배경, (2)등장캐릭터, (3)소품을 기준으로 사례 분석을 진행한다. <울펜슈타인 더 뉴 오더, 2014>의 서사적 구성은 첫째, '차용'의 단계에서 2차 대전 관련 역사적 영상자료를 재구성하여 연출하였으며, 둘째, '연계' 에서는 역사 속 실제 사건이 아닌 당시에 있을 법한 '정황적 허구사건을 통한 연계'로 대체역사적 기점을 구성하였다. 셋째, '변용'의 단계에서는 과거역사의 맥락을 유지하는 '한정적 허구역사'를 SF적 디자인의 그래픽을 통해 게임 속 캐릭터와 공간배경을 디스토피아적 세계로 완성도 있게 구축하였음을 알 수 있다. 본 연구를 통해, <울펜슈타인 더 뉴 오더 (2014)>의 트레일러 영상은 역사기록 영상의 차용을 통한 서사적 구성과 실제를 바탕한 게임 디자인을 효과적으로 재현 및 연출함으로써, 대체역사적 구성이 범세계적 게임 영역에까지 확장되며, 대중오락문화의 수요에 부합함을 알 수 있다.