• Journal of Korean Biological Nursing Science
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• 제16권3호
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• pp.244-250
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• 2014

Purpose: The purpose of this study was to investigate medication and related factors including: gender, age, duration of hospitalization, MMSE, and ADL in elderly who were hospitalized in long-term care facilities. Methods: A total of 282 elderly people who were hospitalized for more than a month were asked to fill in a structured questionnaire which was used to collect data regarding their gender, age, duration of hospitalization, MMSE, ADL, and medication. Results: The average number of drugs per patient was 7.50. Subjects taking 6-7 medications were the highest ranking (23.7%). According to multiple regression analysis, the most significant factor relating to the number of drugs prescribed for each subject were the ages of the subjects (p=.007). Conclusion: We found that the number of prescribed drugs taken by those who were hospitalized were related to age. A tailored strategy is needed to decrease the number of drugs according to age and to control the medicines prescribed to the elderly who are hospitalized in long-term care facilities.

• Nuclear Engineering and Technology
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• 제36권4호
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• pp.357-363
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• 2004

A prototype long pulse ion source was developed, and the beam extraction experiments of the ion source were carried out at the Neutral Beam Test Stand (NBTS) of the Korea Superconducting Tokamak Advanced Research (KSTAR). The ion source consists of a magnetic bucket plasma generator, with multi-pole cusp fields, and a set of tetrode accelerators with circular apertures. Design requirements for the ion source were a 120kV/65A deuterium beam and a 300 s pulse length. Arc discharges of the plasma generator were controlled by using the emission-limited mode, in turn controlled by the applied heating voltage of the cathode filaments. Stable and efficient arc plasmas with a maximum arc power of 100 kW were produced using the constant power mode operation of an arc power supply. A maximum ion density of $8.3{\times}10^{11}\;cm^{-3}$ was obtained by using electrostatic probes, and an optimum arc efficiency of 0.46 A/kW was estimated. The accelerating and decelerating voltages were applied repeatedly, using the re-triggering mode operation of the high voltage switches during a beam pulse, when beam disruptions occurred. The decelerating voltage was always applied prior to the accelerating voltage, to suppress effectively the back-streaming electrons produced at the time of an initial beam formation, by the pre-programmed fast-switch control system. A maximum beam power of 0.9 MW (i.e. $70\;kV{\times}12.5\;A$) with hydrogen was measured for a pulse duration of 0.8 s. Optimum beam perveance, deduced from the ratio of the gradient grid current to the total beam current, was $0.7\;{\mu}perv$. Stable beams for a long pulse duration of $5{\sim}10\;s$ were tested at low accelerating voltages.

• 디지털융복합연구
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• 제17권12호
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• pp.255-260
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• 2019

실시간검색어는 실시간으로 관심이 급상승하는 검색어에 대한 것으로 한정될 뿐 아니라 포털사이트마다 순위 차이가 있으므로 지속가능성을 파악하기 힘든 한계를 가지고 있다. 실시간검색어에 대한 지속가능성을 평가하는 것은 이러한 한계를 극복하고 예측가능성을 제공해준다는 측면에서 그 의미가 크다. 특히 한 달 이상 지속되는 장기 지속 검색어의 경우 사회적으로 관심이 오래 지속된 이슈로서 가치가 높다. 따라서 본 논문에서는 실시간검색어 순위에 기반한 관심도와 실시간검색어의 지속주수, 지속일수, 지속시간에 기반을 둔 지속도를 각 포털사이트 및 통합 포털사이트 별로 파악한 다음, 관심도와 지속도가 높은 것을 기준으로 지속가능성을 평가하여, 장기 지속가능성이 높은 실시간이슈를 도출하는 방법을 제시하고자 한다.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2003년도 한국우주과학회보 제12권1호
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• pp.49-49
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• 2003

No Abstract, See Full Text

• 대한치과의사협회지
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• 제37권4호통권359호
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• pp.287-293
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• 1999

Long-term posttreatment stability is great concern to all orthodontist. So, this article was disussed that etiology of relapse, classificatioan of retention, duration of retention and treat after relapse. The most important thing about stability was considered that growth pattern, periodontal remodeling, neuromuscular factors and applied the appropriate mechanotherapy. Retenton was considered during the treatment planning and required considerable analytic thought.

• The Korean Journal of Pain
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• 제37권2호
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• pp.178-181
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• 2024

• 한국정보처리학회논문지
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• 제4권9호
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• pp.2366-2377
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• 1997

본 논문은 ATM망의 트래픽 제어에서 예방적 기법인 가변 토큰풀(Variable Token Pool : VTP)을 이용한 적응적 사용 파라메터 제어에 관한 메카니즘을 제안한다. 가변 토큰풀 메카니즘은 ON-OFF형 트래픽의 버스트 기간과 침묵 기간을 장기간 감시하여 토큰풀을 가변시킴으로서 최대 비트율 뿐만 아니라 평균 비트율과 버스트 기간 위반을 함께 감시할 수 있다. 또한 제안된 메카니즘은 버스트 기간과 평균 비트율 위반에 대한 민감성을 개선할 수 있고, 위반 사항에 대한 반응이 빨리 나타난다. VTP 크기는 버스트와 침묵 구간마다 계단 형태로 변하고, 하향 간격 (Down_size)과 상향 간격 (Up_size)의 값에 따라 제어된다. 본 논문에서 제안한 메카니즘을 시뮬레이션을 통해 LB와 JW 메카니즘과의 성능을 비교 분석하였다. VTP메카니즘은 기존에 제안된 메카니즘보다 좀더 엄격한 제어 능력을 보였다. VTP 메카니즘의 셀 손실율은 VTP의 파라메터 (Down_size, Up_size)값의 증감에 따라 다르게 나타났으며, 두 파라메터 값이 트래픽 상황에 따라 적당한 값으로 결정되어야 함을 보여주었다.

• 수산해양기술연구
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• 제43권3호
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• pp.206-211
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• 2007

The sciaenid species, which has swimbladder, generates sounds by vibrating in its length wards when spawning or getting stimulus from something else. This research analyzed on sound frequency characteristics relatives to their swimbladder length of three sciaenid species, yellow croaker(Larimichthys polyactis), brown croaker(Miichthys miiuy), and white flower croaker(Nibea albiflora). As results, the dominant frequency for yellow croaker ranged over 38.08 to 141.60Hz in wide frequency band, and the averaged pulse duration expressed in $280.3{\pm}156.0ms$. For brown croaker, the dominant frequency ranged in 49.80 to 59.57Hz, and the averaged pulse duration was $129.1{\pm}36.9ms$. Moreover, the dominant frequency of white flower croaker ranged in 73.24 to 86.91Hz, and the averaged pulse duration was $88.0{\pm}15.9ms$, it has shorter pulse duration than any two species. Therefore, the dominant frequency relatives to swimbladder length of sciaenidae showed that it had widely resonant characteristics and long pulse duration as in shorter swimbladder length. Additionally, for white flower croaker, we could confirm their behavior and sounds in response to production of recorded sounds using underwater speaker.

• 한국환경과학회지
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• 제5권3호
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• pp.253-263
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• 1996

This study is an attempt to classify climatic regions of Korea based on the data of sunshine duration and to clarify the characteristics of sunshine for each divided regions. The data used in this study are the mean values of monthly and ten-daily sunshine duration, sunshine percentage, solar radiation and proud amount obtained from 63 weather stations of the Korea Meteorological Administration during the period of 1974~ 1993. The characteristics of annual change of sunshine percentage, annual duration of sunshine, percentage of sunshine, annual radiation, amount of cloud, days of sunshine percentage above 80% and-days of sunless are investigated by the mean values of -the stations belong to divided regions. The ward method of hierarchical cluster analysis is adopted to the analysis of data for the regional division. The results obtained in this study are summarized as follows. (1) The sunshine regions of Korea can be divided into six regions of the central west, central east, south west, souls east, Ullung-do and Cheju-do. These are strongly affected by the dirtribution of inclined slopes taking account of the topographic characteristics of Korea. (2) Annual distribution shows the sunshine duration of 1777~ 2287 hours, sunshine percentage of 40~53%, solar radiation of 3469~4637 MJ/$m^2$, cloud amount of 5.0~6.1, days of sunshine perrentage above 80% of 53~116days and sunless days of 46~71days. (3) The types of annual change of sunshine percentages is classified with four types of minimum in July and maximum in October, minimum in July and maximum in December, high in May and October and low in July and January, high in May and November and low in June and January. (4) The long-term trend of sunshine duration decrease in peninsula area but increase in island area and the Tong-term inclination of cloud amount is almost zero. The author believe this tendency is related to a pollutional turbidity than a cloud amount in inland area.

• 노동경제논집
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• 제27권3호
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• pp.75-111
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• 2004

현 연구에서는 NLSY 데이터를 이용하여 개개인이 노동시장에 진입한 이래로 겪은 모든 실직 및 실업 경험을 추출하고, 이를 바탕으로 특정 시점에서의 임금이 그 이전에 겪었던 실직의 횟수와 누적실업기간에 어떻게 영향을 받는가를 분석하였다. 기존의 연구들과는 달리 현 연구에서는 1회의 실업기간이 아닌 누적실업기간의 효과를 분석하였으며 나아가 실직 횟수와 누적 실업기간 중 어느 변수가 임금에 보다 큰 부정적 영향을 주는가를 분석하였다. 실직 횟수와 누적실업기간을 동시에 설명변수로 포함시킬 경우 남성 표본에서는 누적실업기간만이 유의하게 임금을 낮추는 것으로 나타나는 것과 대조적으로 여성 표본에서는 실직 횟수만이 임금에 부정적인 영향을 주는 것으로 나타났다. 남성의 경우 누적실업기간이 한 달 더 길어지면 임금은 0.4% 낮아지는 것으로 나타났으며 이 추정치는 표본 제약을 다양하게 바꾸고 추정모형을 달리하여도 변함 없이(robust) 나타났다. 한편 여성의 경우 추가적인 1회의 실직 경험이 가져다 주는 임금의 하락은 2%를 상회하는 것으로 나타났다.