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강도다리(Platichthys stellatus) 배합사료 내 곤충분 첨가에 따른 성장 및 사료가치 비교
정성목,김남리,허상우,이승한,배진호,김강웅 한국수산과학회 2023 한국수산과학회지 Vol.56 No.4
The dietary inclusion of black soldier fly larvae meal Hermetia illucens (BSL) for starry flounder Platichthys stellatus was examined in a four-month trial at a Pohang fish farm. Two diets were prepared: a fish meal-based commercial diet (CD) and an experimental diet containing 7% BSL in the CD (BCD). Fish (average weight, 125.2 g) were reared in a square concrete tank (7×7 m) in triplicates. Feed efficiency was significantly higher in fish fed BCD compared to that of the fish fed CD. The DHA/EPA ratio in dorsal muscle was not significantly affected by the fatty acid composition of the experimental diets. Based on the growth performance, the feed cost for producing 1 kg of starry flounder was 1,797 won for CD and 1,814 won for BCD. With government subsidies the feed cost for producing 1 kg of starry flounder was 1,481 won for CD and 1,309 won for BCD. The results indicate that BSL can be included at 7% without adverse effects on growth performance, fillet composition, or feed cost. However, further research is needed to determine the optimum percentage of BSL as a replacement of FM in starry flounder diets.
전기자동차 무선전력 전송 효율 향상을 위한 코일 오정렬 검출 기술에 관한 연구
이태목(Taemok Lee),배진석(Jin-Seok Bae),김동완(Dongwan Kim) 한국정보기술학회 2023 한국정보기술학회논문지 Vol.21 No.2
Recently, many researches about electric vehicle charging technology are conducted with the spread of electric vehicles. The electric vehicle charging technology is classified into wired charging technology and wireless charging technology, and is being developed with a focus on wireless charging technology that does not require physical plug-in. However, the wireless charging technology can lead wireless power charging loss when the transmitter and receiver coils are misaligned, so the misalignment loss of the transmitter and receiver coils is a problem that needs to be solved before the wireless charging technology is commercialized. In this paper, we introduce the coils misalignment detection technology research that can reduce the alignment loss of the transmitter and receiver coils for wireless power charging, and the technology discussed in the J2954 standard of the Society of Automotive Engineers(SAE) and the 61980-2 standard of the International Electrotechnical Commission(IEC).