• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 1999.10a
• /
• pp.403-404
• /
• 1999

발전소, 공상, 지방자치단체 통 국내 대부분의 대기실 관리기관에서 활용할 수 있는 전산기가 개인용 컴퓨터(PC)인 점을 고려하여 위와 같은 여건의 기관들도 쉽게 현업 운영할 수 있도록 KRM 대기확산모델을 개발하였다. 또한, 위의 기관들이 대기오염 수치모델에 대한 전문 지식을 소유한 전문가를 확보하기 어려운 점을 고려하여 대기오염 관리와 Windows O/S에 관한 기본 지식만을 소유한 담당자도 시스템을 사용할 수 있도록 GUI(Graphical User Interface)기법을 활용, KRM 대기확산모델링 시스템을 개발하였다.(중략)

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.29 no.1
• /
• pp.73-97
• /
• 2018

The study is to make a development initiative for humanities and social assets one-stop portal services intended for researchers, thereby establishing long-term road map for Korean Research Memory(KRM) in National Research Foundation of Korea(NRF). The empirical studies conducted for this purpose are as follows: SWOT analysis of KRM's internal and external environment; Usability test for 90 graduate students; Focus group interview for 8 experts. The results of the studies are as follows. First, KRM needs to focus on the sustainability of information provision as well as the integration of research provision. Second, KRM needs to establish the strategy of acquisition for R&D products in quality. Third, KRM needs to be the hub of humanities and social assets and social network platform for researchers. Forth, KRM needs to develop education service for lay users as well as research services for professional researchers.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.46 no.2
• /
• pp.157-163
• /
• 2010

The indirect target strength (TS) estimation method which uses the Kirchhoff ray mode model (KRM model) was discussed to apply for a biomass estimation in the water of mixed species. TS of 25 live scorpion fishes for 120kHz were measured by a tethered method and of others dominant 5 species in the marine ranching ground of Jeju coastal water including a scorpion fish were also estimated by KRM model. The measurement TS of scorpion fish well agreed with the theoretical values and the standard formula of scorpion fish was estimated as $TS_{120kHz}=20Log\;(L)-72.9$ ($r^2=0.67$). TScm values estimated on trial to each sample of dominant 5 species were from -69.3dB to -75.1dB at 120kHz and they were in the general range of swimbladdered fish. It was clarified that TS by KRM model can be used to estimate fish biomass estimation by increasing a sample number and is more effective under the condition that there is rare TS information for inhabiting species in mixed-species area.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.53 no.2
• /
• pp.209-217
• /
• 2020

The purpose of this study was to compare the model-predicted and experimentally measured target strength (TS) of golden cuttlefish Sepia esculenta cuttlebones. Ultrasonic signals used to estimate frequency-dependent TS and the speed of sound in cuttlebones were measured by pulse-echo and through-transmission techniques, using a chirp sonar system and an ultrasonic pulser/receiver system under controlled laboratory conditions. The model appeared to slightly underestimate the predicted TS values in the frequency range of 100-160 kHz. However, there was good agreement between the predicted and measured TS values in the frequency range of 160-200 kHz. The significant similarity between the model-predicted and experimentally measured TS values supports the use of the Kirchhoff-ray mode (KRM) model for acoustic scattering analysis of cuttlebones. Accordingly, we concluded that the KRM model can be used as a tool to evaluate the frequency-dependent variability of TS due to changes in golden cuttlefish swimming depth.

• Proceedings of the Korean Society for Information Management Conference
• /
• 2017.08a
• /
• pp.33-38
• /
• 2017

본 연구는 연구데이터가 공공재로써 관리와 공유의 주체가 국가이어야 한다는 주장으로부터 시작하였다. 국내외의 대표적인 연구데이터 리포지터리 구축 사례를 통해 연구데이터의 관리 및 공유 현황에 대해 살펴보고, 이를 통해 국내 인문사회분야 대표 리포지터리인 한국연구재단 기초학문자료센터(KRM)의 개선방향을 확인하는 것을 목적으로 하였다. 미국, 영국, 호주의 경우와 KRM의 연구데이터관리 현황을 비교한 결과 가장 큰 차이점은 KRM의 경우 연구데이터 관리의 중요성에 대한 인식개선을 위한 교육과 실제 구축을 위한 DMP 및 메타데이터 작성 교육 등이 부재한 상황으로 연구자의 적극적 참여 유도에 긍정적 환경을 제시하지 못하고 있다는 것이다. 이외에도 장기보존을 위한 국제적 표준의 채택이나 전담 인력의 부족 또한 주요한 개선점으로 확인되었다.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.39 no.3
• /
• pp.239-248
• /
• 2003

This paper was conducted as an attempt in order to construct the data bank of target strength for acoustic estimation of fish length in the coastal waters of Korea. The fish length dependence of acoustic target strength for 13 large yellow croakers (Pseudosciaena crocea) at 75 kHz was investigated and the prediction of the target strength by using the Kirchhoff-Ray Mode model (KRM model) was compared with target strength measurements. The results obtained are summarized as follows; 1. In the averaged target strength pattern for 13 large yellow croakers the maximum target strength was -35.13 dB at $-13.35^{\circ}$ on a tilted angle. 2. The relationship between fork length(L, cm) and averaged target strength(TS, dB) was expressed as follows; TS=23. 76log (L) -73.45 (r=0.47) TS=20log(L) -67.35 From this result, the conversion coefficient was -73.45 dB and 6.1 dB lower than the coefficient -67.35 dB where the value of the slope of the regression equation is forced to be 20. 3. Averaged target strength and a length conversion coefficient derived from a target strength histogram for 13 large yellow croakers of mean length 25.59 cm were -41.23 dB, -69.72 dB, respectively. 4. In the range of $$2;{\ll} L (fish length /{\lambda}(wave length);{\ll}40$$, the prediction of the averaged target strength by the KRM model increased gradually with the increasing of $L/{\lambda}$ and was lower than the measured target strength.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 1999.10a
• /
• pp.163-167
• /
• 1999

컴퓨터가 일반화됨에 따라 대기질 관리 및 연구 분야에서 수치모델 이용이 보편화되고 있다. 현재 사용되는 대기오염 수치모델의 종류는 매우 다양하며, 구동에 필요한 전산시스템의 규모도 다양하다. 연구용 및 대형 모델들은 활용 분야가 넓고 신뢰도가 높은 반면 대형 전산시스템과 고도의 전문 인력을 요구한다. 그러나, 국내 대부분의 대기질 관련 기관의 사용 가능한 전산시스템과 담당 인력을 고려할 때 대형 모델의 사용이 일반화되기에는 한계가 있다.(중략)

• Journal of the Korean Society for Library and Information Science
• /
• v.45 no.3
• /
• pp.69-85
• /
• 2011

This study reviewed theories for database integration, which combines heterogeneous data structures, and suggested a practical method to integrate databases of Korean Research Memory(KRM) and Infrastructural Basic Research(IBR) as a case study. In order to broadly distribute the outcomes of IBR, it is essential to be connected to and integrated with the database of KRM. As a solution, it was suggested that the current database of IBR should follow standard guidelines as a XML database, and its future database should be integrated with the database of KRM or be established as a stand-alone system

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.58 no.1
• /
• pp.32-38
• /
• 2022

In this study, Target strength for multi-frequency (38 kHz, 70 kHz, 120 kHz and 200 kHz) of chub mackerel (Scomber japonicus) was estimated using by the KRM model. The body shape of the Chub mackerel was described by an X-ray system and the body length of 20 individuals ranged from 16 cm to 28 cm. The swimbladder tilt angle ranged between -8 and -14°, the maximum TS value according to the swimming angle of chub mackerel was -33.0 dB at -11°. The averaged TScm according to fork length was -66.02 dB at 38 kHz, -66.50 dB at 70 kHz, -66.00 dB at 120 kHz and -67.35 dB at 200kHz, respectively.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.53 no.2
• /
• pp.152-159
• /
• 2017

Rockfish was a commercially important fish specie in marine ranching areas in Korea. To estimate density and biomass of rockfish using acoustic method, target strength (TS) information is required on the species. This study measured TS dependence on tilt angle and size on 14 live rockfish individuals at 38, 70, and, 120 kHz by ex-situ measurement (tethered method) and acoustic scattering model (Krichhoff ray mode, KRM). The swimbladdered angle ranged from 18 to $30^{\circ}$ ($mean{\pm}s.d.=26{\pm}4^{\circ}$). The mean TS for all individuals was highest -35.9 dB of tilt angle $-17^{\circ}$ at 38 kHz, -35.4 dB of tilt angle $-25^{\circ}$ at 70 kHz, and -34.9 dB of tilt angle $-22^{\circ}$ at 120 kHz. The ex-situ TS-total length (TL, cm) relationships were $TS_{38kHz}=20log_{10}(TL)-67.1$, $TS_{70kHz}=20log_{10}(TL)-68.6$, and $TS_{120kHz}=20log_{10}(TL)-69.9$, respectively. The model TS-total length (TL, cm) relationships were $TS_{38kHz}=20log_{10}(TL)-66.4$, $TS_{70kHz}=20log_{10}(TL)-67.0$, $TS_{120kHz}=20log_{10}(TL)-67.0$. The two measurements between the ex-situ TS and KRM model for TS-tilt angle and fish size were found to be significantly correlated.