• Journal of the Korean Society of Food Science and Nutrition
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• v.29 no.1
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• pp.20-25
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• 2000

This study was conducted to evaluate the quality of the plain dried anchovies on the market by determining chemical components, and compared with those of boiled-dried anchovy. The nutritional(total amino acid contents, mineral contents and fatty acid compositions) and favorite properteis (extratives nitrogen content, color and appearance) of plain dried anchovies were superior to those of boiled-dried anchovy. On the other hand, the lipid properties (peroxide value and acid value), food sanitary properteis (volatile basic nitrogen content) and sensory properties (odor) of plain dried anchovies were inferior to boiled-dried anchovy. These results indicated that the plain dried anchovy was classified into lower grade goods by food quality standards.

• Korean Journal of Remote Sensing
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• v.19 no.4
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• pp.271-276
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• 2003

Sea level variability and eddy in the Amsterdam-Crozet-Kerguelen region of the South Indian Ocean were studied during 1 year (October 15, 1992~October 15, 1993) using multi-satellite data (Topex/Poseidon, ERS1) produced by signal treatment. We found that sea level variabilities (>10cm) generally exist along the Antarctic Circumpolar Current in the area of 35$^{\circ}$~46$^{\circ}$S and strong sea level variabilities (20~30cm) were especially occurred from the effects of eddy due to bottom topography in two small area: 49$^{\circ}$~57$^{\circ}$E and 38$^{\circ}$~42$^{\circ}$S, and 58$^{\circ}$~64$^{\circ}$E and 42$^{\circ}$~44$^{\circ}$S.

• The Journal of Engineering Geology
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• v.30 no.4
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• pp.673-682
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• 2020

The ground shear force at the expected failure surface and resistance force due to reinforced anchor can act as important factors according to a failure type from the stability viewpoint at a slope. Furthermore, the anchor's axial force may vary at an anchor-reinforced slope due to ground weathering, settlement, and corrosion in the incompletely anti-corrosion treated steel wire strand at a ground where the bearing plate is installed. However, in case that the resistance force of the anchor is locally lost due to the variation of the anchor's axial force, the resistance force may not play the role so that the external force tends to be transferred to the surrounding anchors, causing an increase in the tensile force in the surrounding anchors. Accordingly, a stability problem at the entire slope may occur, which requires much attention. Thus, this study proposed a method to monitor a variation trend of the tensile force of anchors installed at a slope and infer the external stability at the entire slope considering the monitoring result.

• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.8
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• pp.965-970
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• 2017

The objective of this study was to evaluate the effects of gelatin type (powder vs. hydrated) with or without transglutaminase (TGase) on the physicochemical and textural properties of low-fat model sausages (LFS). Treatments included LFS (control), LFS with hydrated-gel form of gelatin (1%), and LFS with powder form of gelatin (1%). Yellowness values of LFS with any type of gelatin were higher than those without gelatin (P<0.05). Moisture content (%) of LFS containing powder form of gelatin (1%) was higher than those with hydrated-gel form of gelatin or control (P<0.05). Expressible moisture (EM, %) of LFS with hydrated-gel form of gelatin was lower than those with powder form of gelatin (P<0.05). Thus, sausages with hydrated-gel form of gelatin showed better functional properties as compared to those with powder form of gelatin. To elucidate the interaction between gelatin and TGase in meat product, five actual sausages were manufactured: reference [konjac flour (KF), carrageenan (CN), and soy protein isolate], control (KF and CN alone), TRT1 (KF and CN, TGase 1%), TRT2 (KF and CN, gelatin 1%), and TRT3 (KF and CN, TGase 1%+gelatin 1%). EM (%) of sausages with TGase alone was higher than those of other treatments (P<0.05). Most textural properties of TRT3 were higher than those of other treatments. Thus, TRT3 showed better functional properties than those with single addition. In conclusion, a combination of TGase and gelatin could be used to manufacture LFSs with improved functional and textural properties.

• Journal of the korean academy of Pediatric Dentistry
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• v.37 no.4
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• pp.412-421
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• 2010

As a most conservative, minimally invasive trial against early caries lesions, resin infiltration concept has been introduced and studied mainly about effective materials and pre-treatment methods of surface layers to arrest the lesion effectively, which is still going on. This study was performed with an aim of evaluating the efficacy of arresting the caries process in the natural incipient lesions in spite of removing the surface layers and we obtained the results as follows: 1. It was revealed that infiltration groups(1, 3, 5) showed lower radio-density decline between pre- and posttreatment than control groups(2, 4, 6)(p<0.05). 2. Group 5, in which the surface layer was removed with hydrochloric acid, showed the most significant anticariogenic effect(p<0.05). 3. Under SEM evaluation after infiltration, group 1 and 3 showed more irregular destruction and intensive loss of surface layers than group 5. In conclusion, it was thought resin infiltration can be an effective tool against the early caries lesions although surface layers are removed.

• Economic and Environmental Geology
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• v.39 no.6 s.181
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• pp.711-717
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• 2006

In order to study gas hydrate, potential future energy resources, Korea Institute of Geoscience and Mineral Resources has conducted seismic reflection survey in the East Sea since 1997. one of evidence for presence of gas hydrate in seismic reflection data is a bottom simulating reflector (BSR). The BSR occurs at the interface between overlaying higher velocity, hydrate-bearing sediment and underlying lower velocity, free gas-bearing sediment. That is often characterized by large reflection coefficient and reflection polarity reverse to that of seafloor reflection. In order to apply depth migration to seismic reflection data. we need high performance computers and a parallelizing technique because of huge data volume and computation. Phase shift plus interpolation (PSPI) is a useful method for migration due to less computing time and computational efficiency. PSPI is intrinsically parallelizing characteristic in the frequency domain. We conducted conventional data processing for the gas hydrate data of the Ease Sea and then applied prestack depth migration using message-passing-interface PSPI (MPI_PSPI) that was parallelized by MPI local-area-multi-computer (MPI_LAM). Velocity model was made using the stack velocities after we had picked horizons on the stack image with in-house processing tool, Geobit. We could find the BSRs on the migrated stack section were about at SP 3555-4162 and two way travel time around 2,950 ms in time domain. In depth domain such BSRs appear at 6-17 km distance and 2.1 km depth from the seafloor. Since energy concentrated subsurface was well imaged we have to choose acquisition parameters suited for transmitting seismic energy to target area.

• The Journal of the Petrological Society of Korea
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• v.16 no.3
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• pp.129-143
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• 2007

We have studied orientational characteristics of microcracks in Mesozoic granites and granitic dyke rocks from Seokmo-do, Ganghwa-gun. Microcracks on horizontal surfaces of rock samples from 14 sites were investigated by image processing. Orientations of these microcracks compared with those of 18 sets of joints in Mesozoic granites from Seokmo-do. From the related chart, microcrack sets show strong preferred orientations which obviously are coincident with the direction of vertical common joints. It follows that the formation of macroscopic joints may be the results of further growth and step-wise jointing of pre-existing microcracks. Orientations of microcracks from this result also compared with those of vertical rift and grain planes for Jurassic and Cretaceous granite quarries in Korea. As shown in the distribution chart, the congruence of distribution pattern among microcracks and rift and grain planes suggests that similar microcrack systems probably occur regionally in Jurassic and Cretaceous granites from Korea. In particular, whole domain of the distribution chart was divided into 16 groups in terms of the phases of distribution of microcracks and planes. These microcrack sets in each domains construct complex composite microcrack systems which have formed progressively by different geologic processes and under varying conditions.

• Journal of Bio-Environment Control
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• v.12 no.4
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• pp.190-194
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• 2003

This study was carried out to investigate the effect of several subtrates on the growth of cucumber and tomato seedlings. Cucumber and tomato seeds were sown in plug trays that were filled with eight differenct kinds of substrates. One of them was filled with recycled rockwool by 100%. The other six were mixed with used rockwool media:several ratios of recycled rockwool+peatmoss (1:1, 1:2, 1:3, v/v) and recycled rockwool+chestnut wood ships (1:1, 1:2, 1:3, v/v), and the last was 100% chestnut wood chips. The growth of cucumber and tomato seedlingsin 72 plug tray was better in recycled rockwool+peatmoss (1:2, v/v) substrates that the others tested. CEC 9cation exchange capacity) and EC was a little higher in mixed substrates that blended with organic media. But 100% chestnut wood chips and mixed ones with recycled rockwool inhibited severely the growth of seedlings, especially in tomatos. Therefore, it is suggested that the recycled rockwool be capable of utilization to raise seedlings of cucumber and tomato.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.193-194
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• 2018

본 논문에서는 IIoT(Industrial IoT) 환경에서 사용되는 수 천 개 이상의 센서 데이터를 효율적으로 처리하기 위하여 분산 게이트웨이 시스템을 제안한다. 이 시스템은 대량의 센서에서 측정되는 데이터를 단일 게이트웨이 단위로 처리할 때 늘어나는 작업부하와 처리 시간 지연, 신뢰성 및 정확성 저하를 해결하기 위하여 복수의 게이트웨이 간 연계를 통해 대량의 센서에서 측정되는 데이터를 실시간 처리가 가능한 게이트웨이로 지연시간 없이 균등 할당함으로써 작업부하의 완화와 처리 시간의 가속화, 신뢰성 및 정확성 확보를 이루어낼 수 있다. 본 논문에서는 단일 게이트웨이 시스템과 분산 게이트웨이 시스템의 비교를 통해 수천 개 이상의 센서에서 측정되는 데이터 처리 시간의 차이를 확인함으로써 IIoT 환경에서 분산 게이트웨이의 활용도 면에서 우수함을 보인다.

• Annual Conference of KIPS
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• 2001.04a
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• pp.101-104
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• 2001

데이터베이스에서 트랜잭션의 처리량을 향상시키기 위해서 기존의 문법 위주의 직렬성 이론으로는 단위시간당 처리량을 높이기는 힘든 형편이다. 이를 위하여 이타적 잠금 기법(altruistic locking: AL)은 트랜잭션이 객체를 사용한 다음 더 이상 그 객체를 요구하지 않을 때 다른 트랜잭션들이 그 객체를 로크할 수 있도록 미리 객체에 대한 로크를 해제함으로써 트랜잭션들의 대기시간을 줄이고 처리량을 향상시키기 위한 취지에서 제안된 것이다. 확장형 이타적 잠금(extended altruistic locking: XAL)기법은 AL 을 자취의 확장한 것으로 AL 이 근본적으로 안고 있는 반드시 기부된 객체만을 처리해야 한다는 제약을 완화한 기법이다. 본 논문에서는 분산 데이터베이스 환경하에서 장기 트랜잭션으로 인한 단기 트랜잭션의 대기현상을 최소화하도록 함으로써 동시성 제어의 정도를 높일 수 있는 새로운 확장형 이타적 잠금 기법인 양방향 기부기법(two-way donation locking: 2DL)을 제안하고 기존의 제어기법과 비교하였다. 모의실험에 의한 성능평가 결과 2DL 은 작업 처리율과 트랜잭션의 평균 대기시간 면에서 우수한 결과를 나타내었다.