• 한국해양학회지
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• v.24 no.2
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• pp.84-95
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• 1989

The feeding guild classification proposed by Fauchald and Jumars (1979) and the relationship between this guild structure and the habitat environment were examined based on the quantitative polycheate samples collected on the continental shelf off the southeastern coast of Korea. Total 12 feeding guilds were found and the major feeding guilds of polychaetes were BSX (burrowing, sessile, non-jawed), SDT (surface deposit feeding, discretely motile, tentaculate), SST (surface deposit feeding, sessile, tentaculate), BMX (burrowing, motile, non-jawed), BMJ (burrowing, motile, jawed), SDJ (surface deposit feeding, discretely motile, jawed). There were more significant associations between feeding guilds and mean grain size (${\phi}$); SST and BMJ showed a positive correlation with mean phi, whereas CDJ (carnivore, discretely motile, jawed) and FDT (filter feeding, discretely motile, tentaculate), a negative value. The CDJ and CMX (carnivore, motile, non-jawed) guilds showed positive correlations with sand content, but only SST guild showed a positive correlation with clay. The heterogeneity of sediment or sorting value (${\phi}$) was highly associated with various feeding strategies of polychaetes. Surface deposit feeders and filter feeders, sessile, and tentaculate strategies were associated with poorly sorted or heterogeneous sediments. Some preliminary polychaete feeding surfaces were posed. Southern and northern coastal region composed of muddy sediment were characterized by SDJ; northern slope of mud by SST; central coast of mud by SDT, BSX; and BMX; southern offshore of sandy sediment by SDJ and IDT (interface feeding, discretely motile, tentaculate).

• Horticultural Science & Technology
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• v.18 no.1
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• pp.28-32
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• 2000

This study was carried out to investigate the effects of uniconazole treatment on the growth and flowering of potted Chrysanthemum indicum L. for high quality pot plant production. Uniconazole was drenched at 0.05, 0.01, or 0.15 mg a.i./pot at 14 days after planting (DAP) of rooted cuttings. Simultaneously the short-day treatment (SDT) and pinching were adapted. The same amount of uniconazole (0.05 mg a.i./pot) was spilt drenched at once, twice, and three times, respectively, at 1 week interval. Uniconazole markedly reduced plant height, branch length, and stem diameter. Plant height was reduced linearly with increasing uniconazole concentration at 0.05, 0.01, or 0.15 mg a.i./pot up-to 41.6%, 52.5%, and 58.5%, respectively. In 0.05 mg a.i./pot, the number of branches greatly increased and plant height of 22.6 cm was adequate for pot plant. However, higher concentrations (0.10, 0.15 mg a.i.) were not suitable for production of high quality pot plant (17.0, 14.8 cm, respectively). Pinching and SDT decreased the number of days to visible bud, while uniconazole treatments delayed days to visible bud by 5-9 days compared with pinching and SDT. Number of visible buds was highest at 0.05 mg a.i./pot uniconazole treatment. However, flower diameter was decreased by uniconazole treatment, resulting in compact form. Number of stomata was increased by uniconazole treatment. The length of vascular tissues of uniconazole-treated plants ($11.2{\mu}m$) was smaller than that of non-treated plants ($15.0{\mu}m$, and the size of xylem vessel was also decreased. Uniconazole treatment at 0.05 mg a.i./pot at 14 DAP with pinching and SDT were recommended for pot plant production of C. indicum L.

• Journal of the Ergonomics Society of Korea
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• v.10 no.2
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• pp.51-55
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• 1991

Since slipping has been identified as a major hazard, it is important to understand the mechanism of a slip. Many researches, based on biomechanical studies, had been attempted to do that. Thowever, the correlation between the mechanism of a slip and psychophysical behaviors of people had rarely been verified. For example, the existence of small slips in a forward direction, which do not normally perceived by human subjects, has been established by several experimenters. However, the term "microslips are not perceived by the walkers[4]." has not been examined precisely by any experiments. The objective of this study is, using a Signal Detection Theory (SDT), to define a microslip and slip more quqntitatively with the biomechanical measurement of slip distance. The results showed that, the slip distance around the 3 centimeters, there was a obvious change in the accident detectability of the subject. The conclusion is that it is possible to identify the boundary of a microslip and slip around the 3 centermeters of slip distance.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2007.02a
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• pp.35-40
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• 2007

본 논문에서는 사운드디자이너가 주어진 영상조건 속에서 음원(sound source)을 어떻게 구성하고, 디자인하고, 믹싱하는가 에 따라 수용자의 그 감응도(감정적변화:sympathy response)와 인지도(이해와 기억도:acknowl-edgment)가 달라질 수 있는가를 분석하고자 한 것이다. 그 방법으로 영상음향의 구조에서 음악, 음향, 대사의 상호크기, 연결, 편집, 강조, 등을 달리한 영상 내에서 사운드디자인과 믹싱을 달리하여 실험하였으며 주관적평가방법과 뇌파변화측정방법 2가지로 하여 비교, 평가 분석하고자 했다. 사운드의 디자인구조가 수용자에게 미치는 영향도를 알아보는 이러한 연구는 영화, 방송 등 미디어사운드에서 사운드디자인 구조를 어떻게 만들어야 하는가? 에 대한 방법론적 정리에 기여할 것으로 기대된다.

• Korean Journal of Pharmacognosy
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• v.41 no.1
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• pp.58-61
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• 2010

Medicinal plant Rehmanniae Radix has long been used as traditional herbal medicine in Korea. In this study, we investigated quantitative changes of marker substance 5-hydroxymethyl-2-furaldehyde (5-HMF) in Rehmanniae Radix Preparata fermented with Ganoderma lucidum, Paecilomyces japonica, honey, and Nuruk, using HPLC according to the Korean Pharmacopoeia. As a result, 5-HMF was decreased in SDT and SYT, and increased in SST and SNT, comparing with control group. Quantitative increasing of 5-HMF is not exactly in direct proportion with fermentation, and it is need further studies to elucidate mechanism of quantitative changes by converted and newly produced substances with fermentation.

• Spatial Information Research
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• v.5 no.1
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• pp.77-88
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• 1997

This paper presents the design and implementaion of an object-relational geographic information system. This system has been developed on top of a commercial object-relational database management system. It provides flexible spatial data model, spatial query language, visual user interface, and efficient spatial access methods(D0T) in which traditional primary-key access methods can be applied. We report on our design choices and describe the current status of Implementation. The conceptual model of the system is based on SDTS, and is mapped to the intemal obiect-oriented data model. Kevwords : object-oriented data model, GIS, spatial data model, spatial access method.

• Steel and Composite Structures
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• v.25 no.5
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• pp.581-591
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• 2017

The dynamic instability of truncated conical shells subjected to dynamic axial load within first order shear deformation theory (FSDT) is examined. The conical shell is made from functionally graded (FG) orthotropic material. In the formulation of problem a dynamic version of Donnell's shell theory is used. The equations are converted to a Mathieu-Hill type differential equation employing Galerkin's method. The boundaries of main instability zones are found applying the method proposed by Bolotin. To verify these results, the results of other studies in the literature were compared. The influences of material gradient, orthotropy, as well as changing the geometric dimensions on the borders of the main areas of the instability are investigated.

• 한국지형공간정보학회:학술대회논문집
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• 1995.10a
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• pp.1-23
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• 1995

전 세계는 지금 지리정보(地理情報)시스템의 도입으로 각종 지상 및 지하의 시설물을 모두 전산(電算) 입력함으로써 정확한 소재파악은 물론이고. 각종 재해가 발생했을 때 신속히 대처하고 있다. 또 지구의 구석구석이 연결될 초고속 정보(情報)시스템이 완성될 경우 우리가 접할 정보(情報)의 양은 엄청나게 많아질 것이며, 공간정보(空間情報)의 유통 및 교류의 극대화로 인한 행정업무의 효율성이 제고(提高)될 수 있을 것이다. 각기 필요에 따라 구축되는 각종 공간정보(空間情報)를 서로 교환(交換)하여 공유(共有)할 수 있는 길만이 막대한 재원의 낭비를 막고 정보(情報)이용의 극대화를 도모할 수 있는 지름길이다. 공간정보(空間情報) 유통의 효율성을 극대화하기 위해서는 정보(情報)의 표준(標準) 및 송수신(送受信) 표준(標準)이 필요하며, 이에 본 논문에서는 미국(美國)의 표준(標準)인 SDTS를 중심으로 공간정보(空間情報) 표준(標準)의 현황을 분석하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06c
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• pp.190-192
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• 2006

원자력 발전소의 제어 소프트웨어는 안전성이 중요시 되는 시스템이다. KNICS 컨소시엄의 APR-1400 RPS 개발 프로젝트에서는 시스템의 안전성과 품질을 높이기 위하여 요구사항을 NuSCR 정형명세로 기술하였다. 명세에 대한 분석을 위하여 SMV를 이용한 자동화된 정형검증 기법이 사용되는데, 본 논문에서는 테이블 형태의 명세인 SDT까지 그 범위를 확장하는 방법을 제안한다. 제안하는 방법의 효율성을 입증하기 위하여 실제 프로젝트에서 개발중인 시스템의 일부를 예제로 사용하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.658-660
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• 2004

디지털 방송을 위한 Java 언어 기반 MPEG-2 TS(전송 스트림) 패킷 분석 시스템은 TS 패킷의 내용을 분석하고. PSI Table과 SI Table 데이터를 수집하여 분석 할 수 있도록 해준다. 구현된 패킷 분석 시스템은 PAT PMT, NIT, CAT 등의 PSI Table과 BAT, NIT, EIT, SDT 등의 SI Table의 정보를 계층적으로 분류 시켜준다. 또한 그 안의 포함된 다양한 의미의 컨텐츠를 포함하는 여러 종류의 Descriptor들의 정보도 분석해준다. 패킷 분석 시스템은 멀티-쓰레딩과 편리한 데이터 관리를 위해서 몇몇 클래스들로 구성 되어있다. 그리고 패킷 분석 시스템의 GUI는 Swing 라이브러리로 구현되었기 때문에, 시스템은 GUI의 변화 없이 윈도우즈. 리눅스와 같은 여러 가지 플랫폼에서도 안정적으로 동작된다. 본 연구의 시스템은 향후 DSM-CC 메카니즘과 의미적 분석의 구현 그리고 데이터베이스 시스템과의 연동 등으로 심화되어 연구될 것이다.