• 한국빅데이터학회지
• /
• 제8권2호
• /
• pp.15-25
• /
• 2023

익스트림 러닝머신은 다양한 방식의 예측 분야에서 주요 분석 방법을 제공하고 있다. 시계열 자료의 복잡한 패턴을 학습하고 잡음이 포함되어 있는 데이터이거나 비선형인 경우에도 최적의 학습을 통하여 정확한 예측을 할 수 있다. 이 연구에서는 온라인 시계열 자료를 분석하는 도구로서 주로 연구되고 있는 기계학습 모형들의 최근 동향들을 기존 알고리즘을 이용한 응용 특성들과 함께 제시한다. 지속적이고 폭발적으로 발생하는 대규모 온라인 데이터를 효율적으로 학습시키기 위해서는 다양하게 진화 가능한 속성에서도 잘 수행될 수 있는 학습 기술이 필요하다. 따라서 이 연구를 통하여 시계열 예측 분야에서 빅데이터가 적용되는 최신 기계 학습 모형에 대한 포괄적인 개요를 살펴보고, 빅데이터에 대한 기계 학습의 주요 과제 중 하나인 온라인 데이터를 학습하는 최신 모형들의 일반적인 특성과 온라인 시계열 자료를 얼마나 효율적으로 학습하고 예측에 활용할 수 있는지에 대하여 논의하고 그 대안을 제시한다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 심포지엄 논문집 정보 및 제어부문
• /
• pp.184-186
• /
• 2007

Currently many sensors and processing data in a robot based on USN environments need to real-time features. In this paper, we examine recent research trends on real-time operating systems, especially on real-time embedded Linux, RTAI and Xenomai, for intelligent robots. Xenomai is a real-time development framework and have special feature supporting RTAI, VxWorks, pSOS+ etc. through the "skin". This research gives a guide to researcher in using real-time embedded Linux in the sense of architecture, supporting real-time mechanisms, kinds of real-time device driver, performances.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제36권3호
• /
• pp.236-243
• /
• 2009

특허, 뉴스, 블로그와 같이 시간 정보가 있는 문서들로부터의 자동적인 트렌드 분석(trend analysis)은 토픽탐지 및 추적 기술(TDT: Topic Detection and Tracking)과 더불어 중요한 연구 분야로 대두되고 있다. 과거 연구들은 대부분 트렌드과 관련된 단어의 출현 빈도 정보를 이용하여 주어진 개념의 중요도를 측정하고 이 개념의 시간에 따른 트렌드 라인을 보여주는 것에 초점을 맞췄다. 신출 트렌드 (emerging trend)를 탐지하기 위해서는 주어진 개념의 출현 빈도수 변화와 같은 간단한 방법이나 학습 데이타와 비교하여 차이를 탐지하여 제시하는 방법이 사용되었다. 그러나 여러 트렌드 중에서 특징적인 트렌드를 찾아서 사용자에게 제공하기 위해서는 트렌드 순위 결정 함수가 필요하다. 본 논문은 트렌드의 다양한 측면을 정량화하기 위하여 출현 빈도로 구성된 트렌드 곡선으로부터 네 가지 속성 (변동성, 지속성, 안정성, 누적량) 을 정의하고 이를 활용한 트렌드 순위 결정 방법을 제안한다. 일련의 실험을 통하여 각 속성의 유용성을 검증하고 속성들의 조합이 순위 결정에 어떤 영향을 미치는지 분석하였다. 실험결과로부터 네 가지 속성을 모두 조합할 경우 특징적인 트렌드 탐지에 더욱 기여하는 것을 알 수 있다.

• 가족자원경영과 정책
• /
• 제25권1호
• /
• pp.47-61
• /
• 2021

본 연구의 목적은 생애주기 한 가운데에서 역동적인 변화를 맞이하고 있는 중년세대의 가사노동 트렌드를 분석함으로써 이들이 변화에 어떻게 대처하고 적응해나가는지 살펴보는 것이다. 본 연구에서는 주목한 중년세대는 코호트별로 베이비붐세대나 X세대를 포함하고, 연령별로는 40-50대를 중심으로 하였다. 연구방법은 문헌연구로, 기본적으로 통계청의 생활시간조사자료를 통해 가사노동시간의 추이를 분석하고, 각종 시장조사자료, 연구보고서, 신문기사 검색을 통해 가사노동 트렌드를 분석하였다. 가사노동이란 가족원에 의해 가족원을 위해 수행되는 무보수의 활동으로 시장에서 재화나 용역을 구입함으로써 대체될 수 있는 활동이다. 본 연구는 기술과 산업의 발전에 따라 급속하게 성장한 가전시장과 가사대체 상품 및 서비스가 가사노동 효율화에 어떠한 영향을 미쳤는지에 초점을 맞추고 중년세대의 가사노동 변화 트렌드를 살펴보았다. 기존의 세대와 다른 특징을 가진 중년세대의 가사노동 트렌드 변화를 살펴보는 것은 향후 시장동향을 예측하고 중년세대의 삶의 질 향상을 지원하는 가족정책에 대한 시사점을 도출한다는 점에서 의의가 있다.

• 복식
• /
• 제18권
• /
• pp.195-210
• /
• 1992

The present research analyzed the social meaning of Korean clothing in women's magazine. The data were included the advertisements and publicity related to Korean clothing in two women's magazines and condensed at 5 year intervals with content analysis. The identified 276 advertisements and publicity were categorized into four areas. The categories were the trend of exterior growth of advertisements and publicity, appeals and approach, the elements of advertisements and publicity including background, the relation of models, situations, and styles of Korean clothing over times. The results of the study were as Follows: 1. In conjunction with external growth of advertisements and publicity of Korean clothing, the social meaning of Korean clothing has changed from ceremonial clothing to daily-wear clothing. Especially since 1980, the theme of advertisement and publicity of Korean clothing were changed form the beauty of traditional Korean clothing such as grace of dignity to the individuality which was the typical value of western Clothing. 2. The trends of appeals related to Korean clothing and applied Korean clothing have reflected the changing time and society. Since 1980, the emotional or mixed approach with metaphor have increased, whereas factual or situational approach were dominated in 1960s and 1970s. 3. The styles including silhouette, detail, textile and pattern of Korean clothing and applied Korean clothing also reflected the changing trends of Korean society. Especially since 1980, the applied style of Korean clothing has adopted the trends of western clothing. Implications for the future research were suggested.

• 한국대기환경학회지
• /
• 제19권5호
• /
• pp.561-568
• /
• 2003

Surface ozone concentrations are highly sensitive to meteorological variability. Therefore, in order to reveal the long-term changes in ozone due to the changes in precursor emissions, we need to remove the effects of meteorological fluctuations on the annual distribution of surface ozone. In this paper, the meteorologically adjusted trends of daily maximum surface ozone concentrations in two major Korean cities (Seoul and Busan) are investigated based on ozone data from 11 (Seoul) and 6 (Busan) sites over the period 1992 ∼ 2000. The original time series consisting of the logarithm of daily maximum ozone concentrations are splitted into long-term, seasonal and short-term component using Kolmogorov-Zurbenko (KZ) filter. Meteorological effects are removed from filtered ozone series using multiple linear regression based on meteorologcial variables. The long-term evolution of ozone forming capability due to changes in precursor emission can be obtained applying the KZ filter to the residuals of the regression. The results indicated that meteorologically adjusted long-term daily maximum ozone concentrations had a significant upward trend (Seoul: ＋ 3.02% yr$^{-1}$ , Busan: ＋ 3.45% yr$^{-1}$ ). These changes of meteorologically adjusted ozone concentrations represent the effects of changing background ozone concentrations as well as the more localized changes in emissions.

• Journal of Korean Society for Atmospheric Environment
• /
• 제21권E3호
• /
• pp.95-105
• /
• 2005

The concentrations of sulfur dioxide ($SO_{2}$) were measured from seven major cities and nine provinces in Korea for the period covering 1998 to 2003. Its concentration data were analyzed to explore the possible influences of spatial and temporal factors on the $SO_{2}$ distribution characteristics. Examination of spatial trends of $SO_{2}$ distribution and behavior indicated several interesting features. Although its annual trends appeared to be affected by the changes in the surrounding environmental conditions (e.g., regulation on the use of S-containing fuels), the seasonal trends indicated a cyclic and systematic pattern that may be characterized as: a gradual decrease in concentrations across winter, spring, fall, and summer. The results showed the generally enhanced mean concentrations of $SO_{2}$ from Ulsan, Busan, and Daegu with 12.8, 10.1, and 8.80 ppb, respectively. On the other hand, notably reduced $SO_{2}$ concentrations were seen from Gwangju and Jeju sites with its mean values of 5.43 and 3.88 ppb, respectively. The overall results of our study indicate that a decrease in $SO_{2}$ concentration levels continued through time, while its spatial distribution appears to be affected most sensitively by such factor as city scale and industrial activities.

• 간호행정학회지
• /
• 제19권1호
• /
• pp.108-117
• /
• 2013

Purpose: To analyze trends in salaries for registered nurses when compared with salaries for elementary school teachers from 2002 to 2009 and identify salary gaps of nurses according to workplace size and geographic location. Methods: Data were obtained from the Occupational Employment Statistics collected by the Korea Employment Information Services each year from 2002 to 2009. The study sample consisted of 2,281 registered nurses and 2,578 elementary school teachers. Linear multiple regression analyses were conducted to analyze salary trends and differences. Results: Elementary school teachers had higher monthly salaries than nurses with a baccalaureate degree after adjusting for years of work. Salary differences increased significantly by 40,000 won every year (p<.001). Nurses working in large facilities in Seoul had the highest salaries, whereas those in small/medium, non-Seoul facilities had the lowest salaries consistently over time. Salary differences between the two groups increased by 47,000 won every year (p=.001); salary differences between nurses in large, non-Seoul facilities and those in small/medium, non-Seoul facilities also increased by 40,000 won annually (p=.001). Conclusion: Geographical imbalances in the nurse workforce and nurse shortages in small/medium, non-capital facilities could be reduced by increasing the salary of nurses working in those facilities.

• International Journal of Human Ecology
• /
• 제9권1호
• /
• pp.5-16
• /
• 2008

Development of technology in the $20^{th}$ century has made great contributions to women's lives. With the development of digital convergence, home network, and DMBs (Distance Method Bracings), the ubiquitous technology information era is expected to create a new progressive era for women. The purpose of this study is to investigate the lifestyle that Korean women would like to pursue, especially in regards to the sense of value within the personal and social life of each individual. As a method to suggest how the socio-cultural trends of women's lifestyle will change in the ubiquitous era, qualitative interviews have been conducted over 6 groups with 77 persons between the digital ages of 20s and 30s, living in Seoul. The majority had positive opinions regarding the economic, cultural, emotional, and physical prospects of the ubiquitous information environment. Results show high expectations evolved around freedom from household chores, the equality between the sexes (at home and in society), enhancing the working environment at home, an expansion of human relationships leading to creative knowledge, being able to maintain a single life without economic constraints, and the enjoyment that the internet provides. for suggestions to improve the quality of women's lifestyle through ubiquitous technology, issues such as individual based customization, time management, creating emotional hyperspaces, multi-media communication systems, and women as leaders were studied.

• International Journal of Costume and Fashion
• /
• 제13권2호
• /
• pp.65-77
• /
• 2013

The purposes of this study were to document the fashions adopted by young women in the United States in the 1980s and to explore if and how the dynamic shifts toward postmodernist values influenced those fashion trends. Fifteen U.S. women who were college students in the 1980s were interviewed for the study. In analysis of the data, we focused on social changes during the 1980s and the cultural impact of postmodernism vs. modernism as influential factors. Both postmodern and feminist ideas challenged the mainstream cultural framework of capitalism. U.S. women's styles and behaviors concerning dress reflected characteristics of postmodern consumption patterns, which include nostalgia, ethnic dress, androgyny, eclectic and novel clothing combinations, surprising or humorous appearance, and nonconformity. Despite the critique of conformity and conservatism in dress that had emerged in the 1960s and remained in at least minority or subversive trends, the importance of brand names and designer labels increased in mainstream fashion. This study helps us better understand the dynamics of fashion as it reflects societal and value changes in a transitional time in history.