• Journal of the Korean Society of Food Science and Nutrition
• /
• v.46 no.11
• /
• pp.1271-1277
• /
• 2017

As Kamisipjeondaebotang (KSD) extract is an herbal ingredient, safety is very important due to possible cell poisoning or heavy metal toxicity to organs when administered to humans or animals. Accordingly, this study examined the antioxidant and anti-inflammatory effects of KSD extract to confirm its medicinal safety by using RAW 264.7 cells after heavy metal screening, functional index test of the liver and kidney, and cell survival rate test. Heavy metals were not found in KSD extracts or were less than standard amounts. Liver function indices such as aspartate aminotransferase and alanine aminotransferase revealed low values and kidney function indices such as creatinine and blood urea nitrogen were not significantly different from the normal group. This proved the safety to the human. RAW 264.7 cells showed no poisoning compared to the control group in terms of survival rate. Regarding the antioxidant effect of KSD extract, 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and 2,2'-azino-bis(3-ethylbenzothiazo-line-6-sulphonic acid) radical scavenging activity increased at concentrations over $10{\mu}g/mL$. The anti-inflammatory effect of KSD extract significantly decreased based on the amount of nitric oxide at concentrations of 10 and $100{\mu}g/mL$ compared to the control group. Expression of interleukin (IL)-$1{\beta}$ and IL-6 decreased in a concentration-dependent manner. There was no significant difference in tumor necrosis factor-${\alpha}$ level. Based on the results, KSD can be regarded as a safe antioxidant with anti-inflammatory effects for fracture treatment.

• Journal of the Korea Society of Computer and Information
• /
• v.15 no.9
• /
• pp.87-97
• /
• 2010

A set of definitions for traceability and quick recall service function were urgently needed to facilitate handling of events threatening food safety caused by livestock diseases or germ contaminations. However, the research on the unified management system for both international and domestic livestock products distribution was scarce. The livestock products traceability evaluation model proposed in the paper was composed of four modules: the Forward Transaction Trace (FTT) module, the Backward Record Trace (BRT) module, the Forward Product Trace (FPT) module, and the Origin Pedigree (OP) module. The evaluation indexes for each module was included and finally a pilot system evaluating the proposed management model was suggested and displayed. The result of the paper was expected to be a solution to the distributed traceability system and the proposed traceability management model could be expected to any food traceability.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2022.05a
• /
• pp.255-255
• /
• 2022

안정적이고 효율적인 물 배분과 관리를 위해 하천유량 외에도 하천수 사용량 파악에 대한 관심이 높아짐에 따라 다양한 하천수 사용량 계측방법의 검증 및 표준화로 하천수 사용량 자료의 신뢰도 및 활용성을 개선할 필요가 있다. 다양한 계측방법 중에서도 전자파표면유속계는 비접촉식 유속계이므로 안전적인 측면으로 유리하고 실시간 자료처리 및 계측이 용이하여 활용도가 높다. 본 연구에서는 만경강의 하천수 사용량 파악을 위해 어우보 취수로에 설치된 전자파 표면유속계(RQ-30)를 활용하여 보정계수(K-factor)가 적용된 표면유속을 활용한 유량산정방법, 표면유속과 평균유속의 일정비율로 유량을 산정하는 방법(ISO 748), Chiu의 유속분포법을 활용한 유량산정방법, 지표유속과 인력(人力)에 의한 측정유속과의 관계인 지표유속-평균유속관계곡선식으로 환산된 유량산정 방법등을 비교·검토하고 최적의 유량산정방법을 제시하였다. 향후 전자파표면유속계를 활용한 하천수 사용량의 비교결과를 통하여 더욱 효율적이며 신뢰도 높은 하천수 관리와 실시간 물배분 효과를 기대할 수 있다.

• Spatial Information Research
• /
• v.19 no.1
• /
• pp.13-19
• /
• 2011

As an urbanization is in progress, the change of the planimetric features and topography including high-rise residential buildings commonly occur. The change of the planimetric features and topography causes occurrence of the strong wind and wind speed increase or decrease due to the effect of planimetric features and topography on the windward side even though the wind blows with the same speed. In the design standard, this change by wind speed is defined as the velocity pressure exposure coefficient, the value of coefficient is estimated and reflected by ground surface roughness, but in a reality, ground surface roughness is determined in accordance with the subjective judgement of designer and then the velocity pressure exposure coefficient is estimated, moreover the research and data for classification of ground surface roughness are insufficient. In this paper, we will estimate the velocity pressure exposure coefficient by the quantified method for classifying ground surface roughness by using GIS according to the height of a building targeting area where high-rise residential buildings are built lately. When the structure subjected to wind load is designed, reasonability of design and safety of structure will be more improved by using the estimation method of velocity pressure exposure coefficient presented in this study.

• Explosives and Blasting
• /
• v.33 no.4
• /
• pp.14-24
• /
• 2015

We conducted test blasting in 3 sites to identify the effect on safety of the earth retaining wall by near blasting vibration. As a test result, we confirm that underground structures(earth anchor et al.) are relatively safer than surface structures as the underground vibration is 10~52% of surface vibration at a same distance. We derived surface and underground vibration prediction equations by regression analysis of measured 3 sites' surface and underground vibration PPV. Also we calculated minimum separation distance by blasting pattern about underground and surface curing concrete. Unless any discontinuity which are unsafe on the earth retaining wall appear, blasting work using under 2.4kg per delay is not meaningful to the earth retaining wall's safety as the result of measuring near blasting vibration, confirming change the earth retaining wall's instrument, and observation of structural deformation.

• Journal of Food Hygiene and Safety
• /
• v.34 no.1
• /
• pp.52-57
• /
• 2019

Method development and validation of decursin for the standardization of Angelica gigas Nakai as a functional ingredient and health food were accomplished. The quantitative determination method of decursin as a marker compound of aerial parts of Angelica gigas Nakai extract (AAGE) was optimized by HPLC analysis using a C18 column ($3{\times}150mm$, $3{\mu}m$) with 0.1% TFA in water and acetonitrile as the mobile phase at a flow rate of 0.5 mL/min and detection wavelength of 330 nm. The HPLC/PDA method was applied successfully to quantification of the marker compound in AAGE after validation of the method with linearity, accuracy, and precision. The method showed high linearity in the calibration curve at a coefficient of correlation ($R^2$) of 0.9994 and the limit of detection and limit of quantitation were $0.011{\mu}g/mL$ and $0.033{\mu}g/mL$, respectively. Relative standard deviation (RSD) values of data from intra- and inter-day precision were less than 1.10% and 1.13%, respectively. Recovery of decursin at 0.5, 1, 5 and $10{\mu}g/mL$ were 92.38 ~ 104.11%. These results suggest that the developed HPLC method is very useful for the determination of marker compound in AAGE to develop a health functional material.

• Geophysics and Geophysical Exploration
• /
• v.5 no.3
• /
• pp.185-192
• /
• 2002

We made a study of 3-D migration which could precisely image data of GPR (Ground Penetrating Radar) applied to NDT (Non-Destructive Test) field for the inspection of structural safety. In this study, we obtained 3-D migrated images of important targets in structuresurvey (e.g. steel pipes, cracks) by using 3-D Kirchhoff prestack depth migration scheme developed for seismic data processing. For a concrete model consisting of steel pipe and void, the targets have been well defined with opposite amplitude according to the parameters of the targets. And migrated images using Parallel-Broadside array (XX configuration) have shown higher resolution than those using Perpendicular-Broadside array (YY configuration) when steel pipes had different sizes. Therefore, it is required to analyze the migrated image of XX configuration as well as that of general YY configuration in order to get more accurate information. As the last stage, we chose a model including two steel pipes which cross each other. The upper pipe has been resolved clearly but the lower has been imaged bigger than the model size due to the high conductivity of the upper steel.

• Fire Science and Engineering
• /
• v.32 no.6
• /
• pp.63-68
• /
• 2018

In this study, to recognize the limitations and problems of fire safety in existing deteriorated buildings in Korea, and to analyze the fire case of Jongno Gooshiwon, the fire life safety assessment was performed and analyzed through fire egress simulation and analyzed the domestic and foreign related codes and regulations. In order to secure the fire safety of existing deteriorated buildings, it is necessary to adopt the systematic introduction and application of fire safety performance evaluation of buildings based on quantitative and objective indicated method for performance maintenance and management for fire life safety.

• Journal of Korea Water Resources Association
• /
• v.56 no.11
• /
• pp.729-735
• /
• 2023

The Moderate resolution Imaging Spectroradiometer (MODIS) is a multispectral sensor that has been actively researched in various fields using diverse land and atmospheric products. MODIS was first launched over 20 years ago, and the demand for novel sensors that can produce data comparable to that obtained using MODIS has continuously increased. In this study, land products obtained using the Visible Infrared Imaging Radiometer Suite (VIIRS) of the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite launched in 2011 were introduced, including land surface temperature and vegetation indices such as the normalized difference vegetation index and enhanced vegetation index. These land products were compared with existing data obtained using MODIS to verify their local applicability in South Korea. Based on spatiotemporal monitoring of an extreme drought period in South Korea and the application of VIIRS land products, our results indicate that VIIRS can effectively replace MODIS multispectral sensors for agricultural drought monitoring.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2019.05a
• /
• pp.194-194
• /
• 2019

유역의 물안정성은 공공의 건강, 식량안전과 생태계 보호과 밀접한 연관이 있기에 그에 대한 관심사가 커지고 있다. 본 연구에서는 청색물발자국와 녹색물발자국 개념을 도입하여 물부족과 취약성을 지표로 한 한강의 물안정성을 평가하였다. SWAT모형을 적용하여 청색물 흐름, 녹색물 흐름, 녹색물 저류량을 계산하였다. 청색물은 유역의 물생성량와 지하수 저류량의 합으로 계산되고 녹색물은 실제 증발산량과 토양 수분 함유량의 합으로 계산되는데, 이러한 수문성분들은 SWAT 모형의 결과에서 얻을 수 있다. SWAT 모형은 SUFI-2 최적화 알고리즘을 이용하여 1990-2013년의 관측데이터에 대하여 보정 및 검증을 하였다. 계산결과 청색물의 시간적 분포는 강우패턴의 영향을 받고, 실제 증발산량인 월 녹색물의 흐름은 뚜렷한 계절 패턴을 보여주는 것으로 나타났다. 유역의 물안정성은 생활, 농업과 산업활동 등 인간활동의 물수요와 필요한 환경유지유량을 고려하여 산정하였다. 본 연구에서는 한강유역의 물부족과 취약성에 대한 시간적 변동성을 보여줌으로써 물자원 상황에 대한 이해도를 향상시키고 물 스트레스 기간을 제시하여 물자원의 계획과 관리를 개선 하고자 한다.