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Variation of the Switching Field of Composite Nanowires with Different Widths
Seungho Kim,Hanseok Lee,Seunghyun Lee,Wooyoung Lee,J. Lee 한국자기학회 2008 Journal of Magnetics Vol.13 No.4
The switching field of a 300 ㎚ wide nanowire has been controlled by attaching a wide wire to it. The width of the wide wires varies from 700 ㎚ to 2000 ㎚. While the connection of the two wires does not affect the switching field of the wide wires, it strongly affects the 300 ㎚-wire, resulting in a decrease of the switching field of the isolated wire from 175 Oe to 54 Oe when the 2000 ㎚-wire is connected to it. This result clearly shows that the switching field of the nanowire can be engineered by attaching a nucleation pad that has a different magnetic anisotropy.
이승호(Seungho Lee),허인혜(Inhye Heo),이경미(Kyoungmi Lee),김선영(Sunyoung Kim),이윤선(Yoonsun Lee),권원태(Won-Tae Kwon) 대한지리학회 2008 대한지리학회지 Vol.43 No.1
본 연구에서는 나주지역을 사례로 기후변화가 농업생태에 미치는 영향을 파악하고자 하였다. 이를 위하여 나주지역의 농업 관련 통계자료와 기후 자료를 분석하였다. 벼와 보리의 출수기는 일러지는 경향으로 각각 출수 30일 이전의 평균기온과 음의 상관관계가 있다. 일러진 출수기 때문에 등숙기간의 평균기온이 상승하여 여름철 작물인 벼의 단위면적당 낟알 수는 감소한 반면에 겨울철 작물인 보리의 단위면적당 낟알 수는 증가하였다. 그러므로 기온이 오늘날과 같은 추세로 상승한다면 벼의 수량은 감소하고 보리의 수량은 증가할 것으로 예측할 수 있다. 배의 발아기 및 개화기와 만개기는 점차 일러지는 경향이며, 발아기는 2월에서 3월까지의 평균기온과, 개화기 및 만개기는 2월에서 4월까지의 평균기온과 음의 상관관계가 있다. 배의 당도와 과중은 증가하는 경향이며, 각각 8월과 9월의 평균기온과 양의 상관관계가 있다. 이와 같이 기온 상승은 배의 당도 및 과중 등 생육상태에 긍정적인 영향을 미칠 것으로 예상되지만 발아 및 개화기가 빨라짐에 따라 저온 피해 및 늦서리 피해를 입을 수 있다. 배추와 무의 초장은 모두 감소하는 경향이며, 9월 최고기온과 음의 상관을 보인다. 반면 고추의 착과수는 최근 증가하는 경향이며, 8월의 최저기온과 음의 상관관계가 있다. 기온 상승은 저온성 작물인 배추와 무의 생육 저하를 초래할 수 있으나 고온성 작물인 고추의 생육에는 긍정적인 영향이 예측된다. This study used crop data from statistics yearbooks in Naju and climate data from Gwangju weather station to investigate whether climate changes have had significant impact on crops. The sample crops are rice, barley, pear, radish, Korean cabbage and red pepper. The results showed that the changes in temperature have shifted crop phenology and affected crop growth. The rice and barley heading date were advancing and had negative correlation with average temperature over 30days before average heading date. The number of rice grains per unit area (㎡) were decreasing while the number of barley grains per unit area (㎡) were increasing because average temperature during grain filling period of rice (barley) was increasing (decreasing). Therefore, decreasing (increasing) yields of rice (barley) can be predicted by global warming. The sprouting, flowering and full flowering date of pear were advancing. The sprouting date of pear had negative correlation with average temperature from February to March and the flowering and full flowering date of pear had negative correlation with average temperature from February to April. The brix and weight of pear were increased and were most sensitive to August and September average temperature. An earlier blossom of pear trees holds the danger of damage by late frosts. The plant length of radish and chinese cabbage were decreasing and negatively influenced by maximum temperature on September. The fruit set numbers of red pepper were increasing recently and had positive correlation with minimum temperature on August. The growth of radish and Korean cabbage will be poor, but the growth of red pepper will be good by rising temperature.
MinSoo Byun,Dahyun Yi,JunHo Lee,YoungMin Choe,BoKyung Sohn,JunYoung Lee,HyoJung Choi,Hyewon Baek,YuKyeong Kim,YunSang Lee,ChulHo Sohn,Inhee MookJung,Murim Choi,YuJin Lee,DongWoo Lee,SeungHo Ryu,ShinGy 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.6
Objective-The Korean Brain Aging Study for the Early Diagnosis and Prediction of Alzheimer’s disease (KBASE) aimed to recruit 650 individuals, aged from 20 to 90 years, to search for new biomarkers of Alzheimer’s disease (AD) and to investigate how multi-faceted lifetime experiences and bodily changes contribute to the brain changes or brain pathologies related to the AD process. Methods-All participants received comprehensive clinical and neuropsychological evaluations, multi-modal brain imaging, including magnetic resonance imaging, magnetic resonance angiography, [11C]Pittsburgh compound B-positron emission tomography (PET), and [18F]fluorodeoxyglucose-PET, blood and genetic marker analyses at baseline, and a subset of participants underwent actigraph monitoring and completed a sleep diary. Participants are to be followed annually with clinical and neuropsychological assessments, and biannually with the full KBASE assessment, including neuroimaging and laboratory tests. Results-As of March 2017, in total, 758 individuals had volunteered for this study. Among them, in total, 591 participants-291 cognitively normal (CN) old-aged individuals, 74 CN young- and middle-aged individuals, 139 individuals with mild cognitive impairment (MCI), and 87 individuals with AD dementia (ADD)-were enrolled at baseline, after excluding 162 individuals. A subset of participants (n=275) underwent actigraph monitoring. Conclusion-The KBASE cohort is a prospective, longitudinal cohort study that recruited participants with a wide age range and a wide distribution of cognitive status (CN, MCI, and ADD) and it has several strengths in its design and methodologies. Details of the recruitment, study methodology, and baseline sample characteristics are described in this paper.