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김남동,김정길,정재영,김민지 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
In this talk, researches performed by bottom-up synthesis method for synthesis and functionalization of nano-carbon materials for energy application will be presented. Arc-discharge method will be introduced for the B, N co-doped single walled carbon nano horn (SWNH) and N-doped graphene for supercapacitor application. After simple and very short arc-reaction, high quality nano-carbon materials could be obtained in gram scale, while showing very high performance in supercapacitive energy storage. This approach for the nano-carbon synthesis will open up new opportunity for the nano-carbon of commercialization.
김남동,신동욱 한국기술교육대학교 2004 論文集 Vol.10 No.2
In this thesis, we designed a mobile robot based on Embedded Linux with Intel StrongArm SA-1110(221MHz 32bit RISC Processer). This mobile robot is consisted of main, monitor, image input, sensor and motor drive parts. There are some pictures of the structure of the mobile robot and implemented product in this paper. The mobile robot is evaluated via real-time experiments in order to check out the capability, and we show that test results are satisfactory.
김남동,윤형진,남인호,송인규,이종협 한국물리학회 2012 Current Applied Physics Vol.12 No.4
Nanostructured amorphous Mn oxide, for use as an electrode material in supercapacitors, was prepared by a facile precipitation method using ethanol. After thermal treatment at various temperatures, the structural characteristics and electrochemical properties of the prepared Mn oxide were investigated. Importantly, the experimental results revealed that the alkyl chain of ethanol prevented the excessive crystallization of Mn oxide, resulting in the production of nanostructured Mn oxide. In addition, electrochemical properties of synthesized material were highly dependent on the structural characteristics. Mn oxide thermally treated at 300 ℃, which had an optimized crystalline structure, showed the highest specific capacitance of 161 F/g in this study. Nanostructured amorphous Mn oxide, for use as an electrode material in supercapacitors, was prepared by a facile precipitation method using ethanol. After thermal treatment at various temperatures, the structural characteristics and electrochemical properties of the prepared Mn oxide were investigated. Importantly, the experimental results revealed that the alkyl chain of ethanol prevented the excessive crystallization of Mn oxide, resulting in the production of nanostructured Mn oxide. In addition, electrochemical properties of synthesized material were highly dependent on the structural characteristics. Mn oxide thermally treated at 300 ℃, which had an optimized crystalline structure, showed the highest specific capacitance of 161 F/g in this study.
나노바이오와 에너지 소재를 위한 연 X-선 나노스코피 연구
김남동(Namdong Kim) 한국진공학회 2022 진공 이야기 Vol.9 No.1
Soft X-ray nanoscopy employing the scanning transmission X-ray microscope (STXM) in the Pohang Light Source (PLS-II), which can provide chemical structural information of various functional materials at tens of nanometer scale, has become a powerful study in analytical microscopic research. The nanoscopy beamline is operating currently at the optimum condition in its focused beam size ~30 nm and photon energy resolution < 0.1 eV in the soft X-ray energy range (200-1650 eV). This article presents a short review of the STXM and its applications of functional materials including Li-ion batteries. A brief discussion on the opportunities in the STXM applications is presented at the end.
김남동(Nam Dong Kim),권상옥(Sang Ok Kwon),김현수(Hyun Soo Kim),이동기(Dong Ki Lee),배선우(Sun Woo Bae),장우익(Woo Ick Jang),김호근(Ho Guen Kim),박찬일(Chan Il Park) 대한내과학회 1992 대한내과학회지 Vol.43 No.2
N/A Background: Alcoholic liver disease (ALD) is caused by chronic drinking. The amount and duration of drinking which develop ALD have been reported variously for the different studies. Also the state of liver is various from normal liver to liver cirrhosis or hepatoma for chronic drinkers. Even though the interest on the ALD is growing recently due to the increase of the drinking population and the alcohol consumption in Korea, the clinical research is still insufficient. So this study was started to get the characteristics of the histologic pattern of ALD, required minimum amount of alcohol to develop ALD and clinical differences in various types in Korea. Methods: Authors analysed drinking history, clinical and laboratory findings of 126 patients who were con- firmed as ALD by liver biopsy. Results: 1) In histologic types, 13 fatty liver, 2 alcoholic hepatitis, 69 alcoholic hepatic fibrosis, 18 alcoholic chronic active hepatitis and 24 liver cirrhosis were found. 2) The subjects were 42. 7 years old in average with no difference in types, all male except 2 cases. 3) 106 patients whose drinking history was known drank 149.9 gm per day and 808.3 kg in total amout in average. Alcoholic chronic active hepatitis or liver cirrhosis patients drank more than fatty liver patients in daily amount (p < 0. 05), but the duration of drinking had no difference in types with 16.9 years in average. Also 98.1% of the subjects drank more than 45 gm of alcohol in daily average and 99.1% of the subjects had been drinking for more than 3 years. 4) Symptoms were various such as fatigue or general weakness, abdominal pain, nausea or vomiting, anorexia. Physical signs were also various such as hepatomegaly, jaundice and spider angioma. But any statistical meaning between types cannot be given due to the small number of subjects. 5) In hematologic and biochemical tests, the albumin level was lower in liver cirrhosis than fatty liver or alcoholic hepatic fibrosis (p<0.05), and the platelet count was lower in alcoholic chronic active hepatitis or liver cirrhosis than fatty liver or alcoholic hepatic fibrosis (p<0.05), but there was no laboratory finding to distinguish the types. Conclusions: Results of this study suggest that alcoholic hepatitis is rare and alcoholic hepatic fibrosis is the most frequent in histologic types of ALD. 98,1% of the subjects drank more than 45 gm of alcohol in daily average for more than 3 years. The types of ALD cannot be distinguished by the symptoms, physical signs, hematologic and biochemical tests.