http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
Association between urinary sodium levels and iodine status in Korea
( Jonghwa Ahn ),( Jang Ho Lee ),( Jiwoo Lee ),( Ji Yeon Baek ),( Eyun Song ),( Hye-seon Oh ),( Mijin Kim ),( Suyeon Park ),( Min Ji Jeon ),( Tae Yong Kim ),( Won Bae Kim ),( Young Kee Shong ),( Won Gu 대한내과학회 2020 The Korean Journal of Internal Medicine Vol.35 No.2
Background/Aims: To evaluate the association between the urinary sodium concentration and iodine status in different age groups in Korea. Methods: This nationwide, population-based, cross-sectional study used data from the Korean National Health and Nutrition Examination Survey (VI 2-3, 2014 to 2015). We included 3,645 subjects aged 10 to 75 years with normal kidney function and without a history of thyroid disease. Adequate iodine intake was defined as a urinary iodine/creatinine (I/Cr) ratio of 85 to 220 μg/g. The urinary sodium/ creatinine (Na/Cr) ratios were classified as low (< 47 mmol/g), intermediate (47 to 114 mmol/g), or high (> 114 mmol/g). Results: The median urinary iodine concentration (UIC) was 292 μg/L (interquartile range [IQR], 157 to 672), and the median urinary I/Cr ratio was 195 μg/g (IQR, 104 to 478). Iodine deficiency (< 100 μg/L) and iodine excess (> 300 μg/L) were observed in 11.3% and 49.0% of subjects, respectively. The UIC was significantly associated with the urinary sodium concentration, and the urinary I/Cr ratio was significantly correlated with the urinary Na/Cr ratio (both p < 0.001). The distributions of UIC, urinary I/Cr ratio, and Na/Cr ratio varied among age groups. Low urinary I/Cr and Na/Cr ratios were most common in young adults (age, 19 to 29 years), while high urinary I/Cr and Na/Cr ratios were most common in elderly people (age, 60 to 75 years). Conclusions: Iodine intake was significantly associated with sodium intake in the Korean population. Our study suggested that an adequately low salt intake might be helpful for preventing iodine excess in Korea.
Ahn, Sehee,Choe, Ayoung,Park, Jonghwa,Kim, Heesuk,Son, Jeong Gon,Lee, Sang-Soo,Park, Min,Ko, Hyunhyub The Royal Society of Chemistry 2015 Journal of materials chemistry. C, Materials for o Vol.3 No.10
<P>The development of a transparent and stretchable electrode is critical to the realization of stretchable optoelectronic devices. In this study, a template-guided self-assembly is demonstrated for the integration of carbon nanotubes into 2D rhombic nanomesh films, where the deformation of the rhombic structure accommodates the strain, greatly improving the stretchability. In addition, the regular 2D nanomesh patterns greatly reduce the contact resistance and light scattering. Our rhombic carbon nanotube nanomesh films exhibited significantly lower sheet resistance (∼10 times) at a similar optical transmittance (78%), greater stretchability (∼8 times less resistance increase at 30% strain), and better mechanical durability (∼42 times less resistance increase after 500 stretching cycles at a strain of 30%) than those of random-network carbon nanotube films.</P>
안형택,이종화,정우수 정보통신정책학회 2004 정보통신정책연구 Vol.11 No.2
이 논문은 1996년 1월부터 2002년 12원까지의 원별 통화량 자료를 사용하여 유선과 이동의 전화서비스에 대한 요금지수를 피셔의 방식에 근거하여 산정하고 분석하는 것을 목적으로 한다. 요금지수 산정 결과. 시내전화의 명목지수는 완만히 상승하다가 최관 하락하는 추세를 보이고 있다. 반면, 시외전화와 M발신전화, 그리고 LM통화는 모두 명목과 실질요금지수가 하락하는 추세를 보이고 있는데, 이중 LM통화요금의 하락폭이 가장 것으로 나타나고 있다. 2002년 5월을 기준으로 할 때, 시내와 시외 및 공중시내전화를 통합한 LL통화에 대비한 LM과 M발신통화의 요금수준은 약 3배 정도로 나타났다. The purpose of this paper is to calculate and analyze the Fisher Price Index for the fixed and mobile telephony services, using monthly traffic data during January 1996 and December 2002 in Korea. It is shown that the nominal price index for local telephony has steadily increased then declined only recently. On the other hand, the indices for long-distance, mobile-originating calls and land-to-mobile call services show declining trends. The degree of price cut has been largest for land-to-mobile calls. In June 2002, the prices for mobile-originating calls and land-to- mobile calls were about three times of that of land-to-land-calls.
EEG Coherence를 이용한 실시간 뇌 기능 연결성 분석 시스템
김종화(Jonghwa Kim),황민철(Mincheol Whang),안상민(Sangmin Ahn),이정년(Jungnyun Lee),김송이(Songyi Kim) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1
본 연구에서는 실시간 뇌 기능연결성 분석 시스템을 개발하고자 하였다. 뇌는 기능적 연결성을 가지고 있다. 그러므로 이러한 뇌 기능연결성을 분석하기 위한 시스템이 필요하다. 기존의 연구에서는 뇌 기능연결성을 분석할 때 실험 후 데이터 분석하는 방법을 주로 사용하였는데, 이는 연구방법에 제약이 있다. 하지만 본 연구에서 개발하고자 하는 시스템을 사용하면, 다양한 인지반응유발 후 즉각적 반응을 관찰 가능할 것이다. 뇌 기능연결성 분석 시스템은 EEG Coherence 분석방법을 기반으로 하여 8개의 측정점에서 뇌 기능연결성을 분석 가능하도록 설계 하였다. 시스템은 실시간으로 측정점간의 연결성이 증가하거나 감소하는 것을 분석할 수있도록 구현하였다. 그리고 23명의 피실험자를 대상으로 시스템 성능을 분석하였다. 성능분석은 각성자극을 제시하고 EEG coherence 변화가 있는지 확인하였다. 분석결과 각성과 관련이 많은 우측 전두엽과의 연결성이 증가하는 것을 확인할 수 있었다.
Scalable Service Placement in the Fog Computing Environment for the IoT-Based Smart City
Choi, Jonghwa,Ahn, Sanghyun Korea Information Processing Society 2019 Journal of information processing systems Vol.15 No.2
The Internet of Things (IoT) is one of the main enablers for situation awareness needed in accomplishing smart cities. IoT devices, especially for monitoring purposes, have stringent timing requirements which may not be met by cloud computing. This deficiency of cloud computing can be overcome by fog computing for which fog nodes are placed close to IoT devices. Because of low capabilities of fog nodes compared to cloud data centers, fog nodes may not be deployed with all the services required by IoT devices. Thus, in this article, we focus on the issue of fog service placement and present the recent research trends in this issue. Most of the literature on fog service placement deals with determining an appropriate fog node satisfying the various requirements like delay from the perspective of one or more service requests. In this article, we aim to effectively place fog services in accordance with the pre-obtained service demands, which may have been collected during the prior time interval, instead of on-demand service placement for one or more service requests. The concept of the logical fog network is newly presented for the sake of the scalability of fog service placement in a large-scale smart city. The logical fog network is formed in a tree topology rooted at the cloud data center. Based on the logical fog network, a service placement approach is proposed so that services can be placed on fog nodes in a resource-effective way.