• Preventive Nutrition and Food Science
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• v.6 no.3
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• pp.147-151
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• 2001

The combined effect of water-soluble chitosan oligomer and irradiation on changes in quality of perk sausage made with (156 ppm) or without NaNO$_{2}$ was determined. The pH of nonirradiated sausage without NaNO$_{2}$ decreased significantly during 3 wks of storage, but the pH of irradiated sausage did not. Irradiation at 4.5 kGy did not increase the Hunter color a-value but 10 and 20 kGy showed significantly higher a-values in the sausage with chitosan oligomer (p < 0.05). The sausage with NaNO$_{2}$ had higher sensory scores than that without NaNO$_{2}$, and irradiated sausage had lower scores in overall acceptance. Results indicate that further research is needed to achieve consumers sensory standards for irradiating cooked meat products.

• Journal of Chest Surgery
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• v.43 no.6
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• pp.820-823
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• 2010

There are still some controversies in treatment strategy for the very low-birth-weight baby with esophageal atresia even though the result of primary repair has been improving. We report a successful end to end anastomosis with staged approach in one of twin weighing 1,270 g at birth.

• The Korean Journal of Malacology
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• v.30 no.4
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• pp.443-447
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• 2014

Triploids have several potential advantages over diploids in aquaculture, drawing an elevated commercial reaction into the realistic application of the techniques despite we are still in the early stage of triploid industry for the Pacific oysters Crassostrea gigas. We traced the growth performance of the triploid C. gigas for over a year from hatchery spats, which was created by manipulations of chemicals (Cytochalasin B, CB or 6-Dimethylaminopurine, 6-DMAP). The growth was clearly marked by an initial longer dormancy and following a great magnitude of heterogeneity. The dormancy was almost 9 to 10-month long or even longer and was considered as a downside of the creation. The heterogeneity was magnified by appearance of extraordinarily growing oysters in part during summer season, which could be a representative upside of the triploids. Overall, however, the results were not as positive as were expected. The longer dormancy and following heterogeneity observed in our practice could be marked as an additional negative sign of the chemical use. The present study, thus, might be highly indicative in the introduction of biological cross between tetraploid and diploid to produce natural triploid embryos.

• Proceedings of the KIEE Conference
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• 2006.04b
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• pp.402-404
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• 2006

Electro-magnetic launcher(EML)는 전자기력을 이용하여 발사체를 추진시키는 장치이며 그 종류에는 레일건과 코일건이 있다 본 논문에서는 소형, 경량의 발사체를 추진, 가속시키기 위한 솔레노이드형 EML을 설계, 제작하여 시험 발사하고 그 특성을 분석하였다. 개발된 EML은 소형이기 때문에 launcher의 직경이 작아 자기장을 한 지점으로 집중시키는 장치가 필요없고, 전기에너지를 줄이기 위한 별도의 시스템이 필요하지 않으며, 솔레노이드의 형태와 발사체의 위치, 스위칭 시간에 의해 발사체의 추진력과 속도를 조절할 수 있는 장점이 있었다.

• Journal of the Korean earth science society
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• v.29 no.5
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• pp.375-385
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• 2008

The relationship between two interannual climate variabilities and the frequency of tropical cyclone (TC) that landed over the Korean Peninsula (KP) has investigated for the period of 1951-2004. In the analysis of the relationship between KP-landfall TC frequency and the ENSO phase, most TCs of C-14 (TCs that do not pass through mainland China before landing the KP) and C-23 (TCs that pass through mainland China before landing the KP) tended to more land in the warm phase than normal and cold phases. However, TC intensity at landfall was stronger in the cold and normal phases. In the analysis of the relationship between KP-landfall TC frequency and Arctic Oscillation (AO) phase, the TCs of C-14 tended to more land in the positive (POS) phase of AO and the negative (NEG) phase of AO for C-23. It was found that AO index was negatively correlated with the Ni$\tilde{n}$o-3.4 index. And then the TCs of C-14 landed more frequently over the KP in the AO POS - Ni$\tilde{n}$o-3.4 NEG phases and in the AO NEG - Ni$\tilde{n}$o-3.4 POS phases for the TCs of C-23.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.8
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• pp.129-137
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• 2004

A small size - low priced supersonic wind tunnel of which test section size is 30mm by 35.6mm and run time is 20sec is developed. This educational supersonic wind tunnel is an intermittent blowdown type with an exchangeable nozzle block. In this study, the proper sized and low priced commercial parts are used to reduce the total cost of supersonic wind tunnel. A nozzle design and small supersonic wind tunnel design process has been established, and it is confirmed that a given supersonic flow field has been obtained and proved by experiment.

• Food Industry And Nutrition
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• v.10 no.2
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• pp.26-31
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• 2005

천연물 유래 기능성 물질 탐색의 일환으로 녹차 추출물의 산업적 적용을 용이하게 하기 위하여 감마선 조사를 병용하여 추출물의 색도 및 라디칼 소거능을 확인하고, 이 추출 파우더를 돈육 패티에 적용하여 항산화, 색도 및 관능검사를 통해 기호도를 조사하였다. 생리활성을 가지는 녹차 잎 추출물의 라디칼 소거능은 $68.2\%$를 나타냈으며, 20 kGy로 조사했을 경우 비조사구와 큰 차이를 나타내지 않았다. 또한, 감마선조사에 의한 색도의 변화는 감마선 조사 후 $L^{\ast}-value$는 증가했고, $a^{\ast}$- 및 $b^{\ast}-value$는 감소하는 것으로 확인되었다. 또한, 녹차 잎 추출 파우더를 돈육 패티에 적용해본 결과 비첨가구에 비해 라디칼 소거능 및 지질 산화를 지연시키며, 조사된 녹차 잎 추출 파우더를 첨가한 돈육패티가 비첨가구 혹은 비조사된 녹차 잎 첨가구에 비해 저장 기간에 따라$L^{\ast}-value$가 높게 나타났다. 또한, 모든 처리구에서 관능적으로도 큰 차이를 보이지 않았다 그러므로 천연물 유래 녹차 추출물 파우더는 돈육 패티의 기능성 첨가제로서 우수하며, 감마선 조사는 녹차 잎 추출 파우더의 산업적 적용을 용이하게 하는 방법 중의 하나라고 사료된다.

• 한국지구물리탐사학회:학술대회논문집
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• 2005.09a
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• pp.43-54
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• 2005

Care should be taken when performing the P and S wave velocity loggings. Some of them are the effect of casing that is installed to prevent the borehole collapsing when the drilling is done on the loose ground such as soil and/or soft rock, and the discrepancy of the velocities of the same media according to the difference of the source wave frequency spectrum. To overcome these difficulties, the following suggestions are recommended; (1) try a careful drilling technique that can eliminate the necessity of the casing, and (2) apply the logging methods with the proper frequency spectrum that is appropriate to the object of the velocity logging.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1261-1262
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• 2006

Electro-magnetic launcher(EML)는 전자기력을 이용하여 발사체를 추진시키는 장치이다. EML은 크게 레일건의 형태와 코일건의 형태로 구분되며, 본 논문에서는 코일건의 형태로 설계, 제작하였다. 코일건의 형태인 EML은 솔레노이드에 여자되는 전류에 의해서 발사체에 흡인력이 발생하여 추진, 가속되므로 솔레노이드의 최적형태를 설계하고, 이를 바탕으로 제작하여 EML의 스위칭 시간에 따른 속도를 측정하여, 여자전류의 스위칭 시간에 따른 동작특성을 해석, 실험하여 분석하였다.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2227-2228
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• 2006

Electro-magnetic launcher(EML)는 전자기력을 이용하여 발사체를 추진시키는 장치이다. EML은 크게 레일건의 형태와 코일건의 형태로 구분되며, 본 논문에서는 코일건의 형태로 설계, 제작하였다. 코일건의 형태인 EML은 솔레노이드에 여자되는 전류에 의해서 발사체에 흡인력이 발생하여 추진, 가속되므로 솔레노이드의 최적형태를 설계하고, 이를 바탕으로 제작하여 EML의 스위칭 시간에 따른 속도를 측정하여, 여자전류의 스위칭 시간에 따른 동작특성을 해석, 실험하여 분석하였다.