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김근수,민병대,박수정,오정환,조익환,장석재,김지혜,박상민,박주현,정현미,안태영,정원화,Kim, Geun-Su,Min, Byung-Dae,Park, Su-Jeong,Oh, Jung-Hwan,Cho, Ik-Hwan,Jang, Seok-Jea,Kim, Ji-Hae,Park, Sang-Min,Park, Ju-Hyun,Chung, Hyen-Mi,Ahn, Tae-Yo The Microbiological Society of Korea 2013 미생물학회지 Vol.49 No.4
정수처리 시설에서 급 배수관으로 많이 사용되는 스테인리스관과 동관에 형성되는 생물막의 특성에 대해 16주 동안 조사하였다. 생물막 반응기는 실제 배급수관의 구조와 유사하게 설계하였으며, 정수처리장으로 유입되는 상수원수와 약품혼화 응집수, 침전수, 여과수, 처리수를 사용하였다. 평균 종속영양세균수는 $1.6{\times}10^4CFU/ml$, $5.8{\times}10^3CFU/ml$, $1.8{\times}10^3CFU/ml$, $1.3{\times}10^2CFU/ml$, 1 CFU/ml로 각 처리 과정을 거치면서 감소하였다. 스테인리스관과 동관에 형성된 생물막 세균수는 원수, 응집수, 침전수에서 2주만에 $2.9{\times}10^3CFU/cm^2$ 이상으로 증가하였고, 동관보다 스테인리스관에서 생물막 세균수가 높게 검출되었다. 여과수(평균 잔류염소 0.44 mg/L)에서는 두 관 재질에 따른 생물막 세균수의 명확한 차이는 없었으며, 5주 이후부터 두 관재질 모두 $18CFU/cm^2$ 이하의 생물막 세균이 검출되었다. 정수(평균 잔류염소 0.88 mg/L)에서는 두 관 재질 모두 생물막 세균이 검출되지 않았다. DGGE 분석결과, 원수, 응집수, 침전수에서 스테인리스관은 Sphingomonadaceae가 우점이였고, 동관에서는 Bradyrhizobiaceae와 함께 Sphingomonadaceae도 우점이였다. 여과수의경우, 5주차 이후 스테인리스관과 동관에 형성된 생물막에서 Propionibacterium sp., Sphingomonas sp., Escherichia sp. 등과 유사한 16S rRNA 유전자 서열을 가지는 밴드들이 검출되었다. 종 풍부도 및 다양성은 동관에 비해 스테인리스관이 더 높게 나타났다. Biofilm formed on stainless and copper in water treatment plant was investigated for sixteen weeks. Biofilm reactor was specially designed for this study. It was similar to that of a real distribution pipe. Raw water, coagulated, settled, filtered and treated water were used in this study. The average number of heterotrophic bacteria counts was $1.6{\times}10^4CFU/ml$, $5.8{\times}10^3CFU/ml$, $1.8{\times}10^3CFU/ml$, $1.3{\times}10^2CFU/ml$, 1 CFU/ml, respectively. Density of biofilm bacteria formed on stainless and copper pipes in raw, coagulated and settled water increased above $2.9{\times}10^3CFU/cm^2$ within second weeks while more biofilm bacteria counts were found on the stainless pipe than on the copper pipe. In case of filtered water (free residue chlorine 0.44 mg/L), there was no significant difference in the number of biofilm bacteria on both pipes and biofilm bacteria below $18CFU/cm^2$ were detected on both pipe materials after fifth weeks. Biofilm bacteria were not detected on both pipe materials in treated water (free residue chlorine 0.88 mg/L). According to the results of DGGE analysis, Sphingomonadacae was a dominant species of biofilm bacteria formed on the stainless pipe while the copper pipe had Bradyrhizobiaceae and Sphingomonadaceae as dominant bands. In case of filtered water, a few bands (similar to Propionibacterium sp., Sphingomonas sp., Escherichia sp., and etc.) that have 16S rRNA sequences were detected in biofilm bacteria formed on both pipes after fifth weeks. Stainless pipe had higher species richness and diversity than the copper pipe.
김근수,Kim, Geun-Su 한국도서관협회 1970 圖協月報 Vol.11 No.11
이 해제 목록은 제16회 독서주간을 기념하기 위하여 9월 24일부터 30일까지 서울특별시립 종로 도서관에서 본 협회가 개회한 ‘제1회 한국잡지전시회’에서 출품 전시되었던 잡지를 해제한 것으로 해방이후부터 1960년까지 우리나라에서 간행된 것 중 김근수 선생이 소장하고 있는 것만을 실었음을 밝혀둔다.
김근수(Geun-Su Kim),박규도(Gyu-Do Park),강수혁(Soo-Hyeok Kang) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
In this study, a fire detection system using images in an embedded environment was implemented using the YOLO algorithm. In a single controller, the neural network computation speed is very slow, so a neural network computation accelerator must be used to improve the computation speed. In this paper, Intel"s NCS1 was used as an accelerator, and it deals with how to implement an embedded system.
수직점프 시 비탄력 테이핑이 발목 발등굽힘과 하퇴삼두근의 근활성도에 미치는 영향
김근수 ( Geun-su Kim ),원종혁 ( Jong-hyuck Weon ),정도영 ( Do-young Jung ) 대한물리의학회 2016 대한물리의학회지 Vol.11 No.4
PURPOSE: There are several standard interventions for managing Achilles tendinitis, including eccentric exercise and calf muscle stretches, orthoses, electrotherapy, and taping. However, no study has determined the effect of non-elastic taping on deloading the Achilles tendon while vertical jumping. Therefore, this study determined the effect of non-elastic taping on ankle dorsiflexion and the triceps surae muscle activity while vertical jumping in healthy subjects. METHODS: The study recruited 17 participants. A motion analysis system was used to measure the angle of ankle dorsiflexion and wireless surface electromyography was used to measure the soleus and gastrocnemius activities while vertical jumping. Non-elastic taping was applied on randomized leg side. All subjects performed maximal effort vertical jumps without and with non-elastic taping, with three trials for each condition. The mean peak dorsiflexion and muscle activities during the three trials were calculated and paired t-tests were used to compare the mean values without and with non-elastic taping. Significance was defined as (p<.05). RESULTS: The maximum angle of ankle dorsiflexion and activity of the gastrocnemius muscle decreased significantly when non-elastic tape was applied (p<.05), while there was no significant difference in the soleus activity between no-taping and taping (p>.05). CONCLUSION: We introduce non-elastic taping as a method to decrease maximum ankle dorsiflexion and gastrocnemius activity while vertical jumping.