Securing the safeguardability of a reprocessing process for spent nuclear fuels (SNFs) is imperative. Particularly, the quantity of special nuclear materials inside SNFs must be estimated with the highest achievable precision. Unlike aqueous reprocessing, pyro-processing involves handling input materials in a solid state. Hence, partially extracted samples analyzed by destructive assay (DA) should maintain an acceptable level of representativeness. In this study, a representative sampling method widely applied in the pharmaceutical industry was adopted for homogenization in the head-end process of pyro-processing. By employing representative sampling, specifically based on the mechanism of the rotary riffler, the overall process of homogenization prior to DA analysis was simplified, and less probable hold-up that could contribute to materials unaccounted for (MUF) would be expected. The resulting Pu sampling uncertainty was confirmed to be less than 1% (for ≥ 1,000 μm particle size and ≤ 5 kg sample mass), ensuring sufficient control of Pu accounting uncertainty at a reasonably low level (≤ 1%). Thus, representative sampling can be a competitive alternative to previously suggested methodologies.

In this study, the ultra-smooth surface of Inconel 625 workpieces were achieved by 40000-RPM grade magnetic abrasive polishing (MAP) process. This process created the high rotational speed of workpiece and the movement of magnetic pole to produce the polishing action of magnetic abrasive tools on the surface of Inconel 625 workpieces. The input parameters used in this experiment were selected as the rotational speed of workpiece (40000 rpm), movement of magnetic poles (Feed rate: 2 mm/sec), grain size of abrasive tool (PCD abrasive: 1- ㎛), magnetic poles (A-shape, B-shape, and C-shape) and the polishing times (0, 2, 4, 6, 8, 10, 12, 14 min). The results of this study showed that the smooth surface of Inconel 625 bar was achieved, which the surface roughness of Inconel 625 were significantly improved from 0.33 μm to 0.03 μm within 10 min of the polishing time via B-shape of magnetic poles. This can be confirmed that the 40000-RPM grade MAP processing method is an effective process to achieve high surface quality of Inconel 625 workpieces.

식·약용으로 사용되고 있는 흰점박이꽃무지(Protaetia brevitarsis) 유충은 가공 전처리 시 배변 유도 섭식물로 찹쌀과 비지를 사용하고 있으나 생산비 절감, 영양적 가치 증대, 이취감 저감을 목적으로 가공부산물로 대체할 필요가 있다. 본 연구는 유충의 배변유도섭식물로 홍삼박, 구기자박, 흑마늘박, 마늘부산물 등을 활용하여 이에 대한 효과를 구명하고, 전처리 조건을 확립하였다. 이를 위해 섭취 한 후 배변유도, 체중 감소율, 생존율, 지표물질 등을 조사하였다. 가공부산물을 섭식한 유충의 섬유질 함량은 모든 처리구에서 무처리(절식) 9.91% 보다 낮은 섬유질 함량을 보였다. 유 충의 일별 체중 감소율과 생존율을 회귀분석하여 가공부산물 투입에 따른 사육 용기(264×194×192 mm (W×H×D)) 내 적정 마릿수를 추정한 결 과 홍삼박과 흑마늘박 섭식구가 180과 175마리로 다른 처리에 비해 높은 경향을 보였다. 유충의 살처리 및 동결건조방법에 따른 total ginsenoside, betaine, pyruvate함량은 -20°C 냉동 처리 후 동결건조한 것이 가장 높았으며, 특히 냉동 후 동결건조 처리한 홍삼박 섭식구의 total ginsenoside함 량은 다른 처리에 비해 월등히 높은 경향을 보였다. 따라서 흰점박이꽃무지 유충은 가공 전처리 시 배변 유도 섭식물로 홍삼박을 사용하여 냉동 후 동결건조하는 것이 가장 적합한 것으로 사료된다.

Processing of medicinal plants and mushrooms plays a crucial role in oriental medicine. This study investigated the antioxidant potency and chemical composition of antler-shaped Ganoderma lucidumprocessed under different heating temperatures (120 to 180 °C) and times (10 to 20 minutes). Processed samples were analyzed for their antioxidant activities, including total phenol content, DPPH, ABTS radical scavenging capacity, NO assay, ROS scavenging capacity, and chemical composition changes. Antioxidant potency was highest with processing at 180 °C for 10 min and at 210 °C for 10 min. This enhanced activity is likely attributed to changes in compound functional groups due to heat processing, which in turn influences antioxidant activity. In contrast to antioxidant potency, chemical components, including ganoderic acid D, ganodermanonitriol, and ergosterol, showed decreasing trends with increasing temperature and time.

다알리아(Dahlia pinnata Cav.)는 멕시코 아즈텍인들이 식용으로 재배하여 꽃잎은 샐러드로, 뿌 리는 식용이나 약재로 사용하였다. 그러나 현재는 대부분 화훼용으로 사용되고 있으며, 식용이나 약재로서 의 연구는 부족한 실정이다. 본 연구에서는 다알리아 꽃을 차로 제조하여 다양한 침출 조건과 제다법을 사 용하여 항산화 활성 및 생리활성 성분 함량을 평가하였다. 항산화 활성은 DPPH radial 소거 활성으로 평 가하였으며, 생리활성 성분은 총 폴리페놀 함량(TPC)과 총 플라보노이드 함량(TFC)을 분석하였다. 건조된 다알리아 꽃차는 90℃에서 침출하였을 때 가장 높은 생리활성물질을 추출할 수 있었으며, 적절한 침출 시 간은 8분, 침출 횟수는 3회가 적합하였다. 다양한 제다 방법 중에서 증제법이 가장 높은 항산화 활성을 보 였으며, 그 다음으로 생화, 건조, 덖기 순으로 나타났다. 증제된 다알리아 꽃차의 총 폴리페놀 함량과 플라 보노이드 함량은 각각 50.9 mg/g과 80.6 mg/g으로 건조된 녹차와 비교했을 때 폴리페놀 함량은 낮지만 플라보노이드 함량은 약 3배 높게 나타났다. 이러한 결과는 다알리아 꽃이 우수한 생리활성물질을 함유하 고 있으며, 항산화제로서 식품 및 의약품, 화장품 등에서 높은 활용 가능성을 가지고 있음을 시사한다.

포장상태 평가를 위한 노면영상 촬영은 라인스캔 방식이 주를 이루고 있다. 라인스캔 특성 상, 조사환경이나 장비특성이 달라질 경 우 밝기가 상이한 노면영상을 취득할 수 있고 이는 U-net과 같은 픽셀 단위 segmentation 딥러닝 모델의 균열 자동검출 성능에 영향을 미친다. 본 연구에서는 인공지능 검출 모델의 변경 없이 영상의 밝기 최적화와 morphology 연산기법을 노면영상 전·후처리 방법으로 제시하고 그 효과를 분석하였다. 영상 처리를 통해 과다 검출경향을 보인 이상치들이 제거되었으며 정답으로 간주할 수 있는 전문요 원 분석결과인 GT 균열률과의 상관성 또한 향상됨을 확인하였다.

This study was conducted to estimate the effects of the forage process on rumen fermentation characteristics and greenhouse gas emissions of rye. Rye was grown at the Taeyoung Livestock farm and harvested at the heading stage. The harvested rye (5 kg) was sub-sampled for fresh forage, hay, and silage in triplicates. The sub-sampled rye was freeze-dried or air-dried for fresh forage or rye hay, respectively. For rye silage, the sub-sampled rye forage was ensiled into a 10 L mini bucket silo and stored for 90 days. For 72 h rumen incubation, each forage (0.3 g) was placed into the incubation bottle with the rumen mixture (30 mL) in quadruplicates. After the incubation, total gas was measured and sub-sampled for CO2 and CH4 analyses, and the bottle content was centrifuged for in vitro digestibilities of dry matter (IVDMD) and neutral detergent fiber (IVNDFD), and rumen fermentation characteristics. Silage had higher crude protein, crude ash, and acid detergent fiber concentrations than fresh forage and hay but lower non-fiber carbohydrates and relative feed value (p<0.05). And, silage had higher lactic acid bacteria than the other forages but lower pH (p<0.05). After 72 h incubation in the rumen, fresh forage had higher IVDMD and butyrate content than the other forages (p<0.05). However, silage had higher rumen pH and propionate content than the other forages but lower A:P ratio (p<0.05). Regarding greenhouse gases, silage had lowest total gas (mL/g DMD and NDFD) and CH4 (mL/g DMD and NDFD) emissions, while fresh forage had lowest CO2 (mL/g DMD) emission (p<0.05). Therefore, this study concluded that the ensiling process of rye can effectively mitigate greenhouse gas emissions of Hanwoo.

In this study, the effect of Distribution efficiency through the fishery production base distribution center (FPC) on the production site board facility was studied. FPC is a new distribution system for Korean fishery products that has been promoted in earnest since 2012, and in this study, the effect before and after the introduction of FPC was analyzed using the DID (Difference in Difference) model for the effect of FPC in the fishery industry. The results of analysis shows that in the case of Wando Geumil FPC, the volume and unit price of consignment sales decreased during the analysis period, which was statistically significant. In the case of Sokcho FPC, the volume of consignment sales decreased during the analysis period, which was statistically insignificant. But the unit price of consignment sales rose during the analysis period, which was statistically significant. In the case of Gyeongju FPC, the volume of consignment sales increased during the analysis period, which was statistically significant at the 90% confidence level. But the unit price of consignment sales fell during the analysis period, which was statistically significant.

Black soldier fly (BSF, Hermetia illucens) has been noted as an excellent feed ingredient. However, there is limited information on rearing and processing technology. Thus, this study was conducted to evaluate the substrates for rearing BSF and the optimal processing method for BSF performance. Study separated as 2 experiment, BSF rearing and drying method(Exp 1.) and EP-processing method(exp 2.). During the study, 30 clutches were reared, with 10 per substrate. Three substrates, namely food waste (FW), tofu by-product (TF), and vegetable waste with two drying methods, namely hot air dry (AD) and microwave dry (MW) at expanding (EP) ratios of 5:5 and 7:3, were examined by evaluating their rearing performance, nutrient contents, in vitro digestibility and lipid oxidation stability during storage (0, 14 and 28 days). In experiment 1, the rearing substrates and drying methods were evaluated. Compared with that of conventional methods (FW, AD), the TF substrates and MW method showed higher dry matter contents (3.43%) and in vitro digestibility (1.62%) but lower ether extract contents(3.53%; p<0.05). However, the malondialdehyde (MDA) concentration under MW treatments decreased during storage (5.77%, 4.69% and 3.24%; p<0.05). In experiment 2, compared with that of the 7:3 EP-BSF ratio, the 5:5 EP-BSF ratio showed higher in vitro digestibility (2.70%) and lower MDA concentration during storage (19.19%, 7.96% and 6.42%; p<0.05). In conclusion, the optimal conditions for BSF rearing and ensuring product quality were TF substrates, MW methods and a 5:5 corn:BSF ratio. Therefore, the optimal conditions for producing EP-BSF can present an excellent feed ingredient alternative for swine feed.

현대 해양 산업은 기술적 발전을 통해 신속한 발전을 이루고 있다. 이러한 발전을 주도하는 주요 기술 중 하나는 데이터 처리 기술이며, 이 중 자연어 처리 기법은 사람의 언어를 기계가 이해하고 처리할 수 있도록 하는 기술이다. 본 연구는 자연어 처리 기법을 통해 해양안전심판원의 재결서를 분석하여 이미 재결이 이루어진 선박 충돌사고의 원인 제공 비율을 학습한 후, 새로운 재결서를 입력 하면 원인 제공 비율을 예측하는 모델을 개발하고자 하였다. 이 모델은 사고 당시 적용되는 항법과 원인 제공 비율에 영향을 주는 핵심 키워드의 가중치를 이용하여 사고의 원인 제공 비율을 계산하는 방식으로 구성하였다. 이 연구는 이러한 방식을 통해 제작한 모델의 정 확도를 분석하고, 모델의 실무 적용 가능성을 검토함과 동시에 충돌사고 재발 방지 및 해양사고 당사자들의 분쟁 해결에 기여할 것으로 기대한다.