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  • Title/Summary/Keyword: Current Trend

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A Study on Electronic Component Failure Rate Trend Based on Technology Changes (전자기술의 발전과 전자부품 기본 고장률의 추이)

  • Jang, Ju-Su;Yun, Cha-Jung;Lee, Eun-Kyu;Lee, Eul-Jae;Jang, Jeong-Hoon;Kim, Yong
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2527-2538
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    • 2011
  • The Reliability started for MILitary purposes during World War II in 1942, getting more important for maintenance, safety, etc in modern society. As technologies develop, also international standards for measuring the reliability is advancing. RAMS activities for maintenance, safety verification is material to national railroad. And for this, it needs quick response for the changes of standards. Even now standards are upgrading for developing electronic technologies. Therefore analysis of failure rate's trend about such standards is judged necessary. So We submit a this paper for comparative analysis of changing process standards according to development of electronic technologies and reliability. At first, we compared actual usage ratio of standards for understanding the current state of usage. Based of these state of usage, discuss the major standard. And then, introduced reliability standards's trend, calculation method of failure rate and difference of failure rate calculation standard according to march of time. In this paper, used standards are MIL-HDBK-217F, Telcodia, etc.

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Analysis of Temporal Change in Soil Erosion Potential at Haean-myeon Watershed Due to Climate Change

  • Lee, Wondae;Jang, Chunhwa;Kum, Donghyuk;Jung, Younghun;Kang, Hyunwoo;Yang, Jae E.;Lim, Kyoung Jae;Park, Youn Shik
    • Korean Journal of Soil Science and Fertilizer
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    • v.47 no.2
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    • pp.71-79
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    • 2014
  • Climate change has been social and environmental issues, it typically indicates the trend changes of not only temperature but also rainfall. There is a need to consider climate changes in a long-term soil erosion estimation since soil loss in a watershed can be varied by the changes of rainfall intensity and frequency of torrential rainfall. The impacts of rainfall trend changes on soil loss, one of climate changes, were estimated using Sediment Assessment Tool for Effective Erosion Control (SATEEC) employing L module with current climate scenario and future climate scenario collected from the Korea Meteorological Administration. A 62 km2 watershed was selected to explore the climate changes on soil loss. SATEEC provided an increasing trend of soil loss with the climate change scenarios, which were 182 ton/ha/year in 2010s, 169 ton/ha/year in 2020s, 192 ton/ha/year in 2030s,182 ton/ha/year in 2040s, and 218 ton/ha/year in 2050s. Moreover, it was found that approximately 90% of agricultural area in the watershed displayed the soil loss of 50 ton/ha/year which is exceeding the allow able soil loss regulation by the Ministry of Environment.

Eco-design Color Trends in Fashion (패션에 나타난 에코디자인의 색채경향 연구)

  • Song, Jee-Eun;Choi, Kyung-Hee
    • Journal of the Korean Society of Clothing and Textiles
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    • v.34 no.3
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    • pp.492-507
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    • 2010
  • The eco-design in modem fashion is mixed with a well-being trend that combines functionality and ethics with technology to suggest a new fashion style for the 21st century. This study analyzes the colors of the eco-design in the current fashion trends and identifies the eco-friendly color images that suggest directions for eco-design. The results of this study are as follows. First, the eco-design is an ethical design concept of the ecological value. It can be classified into the functional efficiency in the multi-functionality the sustainability, the recycling capability, the trends for health and craftsmanship, according to various suggestions by eco-design related theorists. Second, the eco-colors shown in the fashion trend follow the order of YR, R, Y, N, and B, with the order of the pale, grayish, light grayish and dull tones. Third, the hue trends of eco-colors each eco-type are focused on R, YR, and Y. With regards to the tones, the functional efficiency, the multi-functional capability, and the sustainability are shown in the neutral tone, while the recycling capability is shown in the grayish tone and the trends pursuing health and craftsmanship are shown in the pale tone.

Civil Aircraft Digital Fly-By-Wire System Technology Development Trend (민간항공기 디지털 Fly-By-Wire 시스템 기술 개발 동향)

  • Kim, Eung-Tai;Chang, Jae-Won;Choi, Hyoung-Sik;Lee, Sug-Chon
    • Current Industrial and Technological Trends in Aerospace
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    • v.7 no.2
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    • pp.85-94
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    • 2009
  • The Fly-By-Wire system was first applied to the fighter and its inherent advantages lead to the advent of the Fly-By-Wire civil aircraft. Recently even the small jet aircraft shows the trend of adopting the Fly-By-Wire system. In the future, most of the aircraft are expected to be the Fly-By-Wire type. In this paper, the structure and the characteristics of the Fly-By-Wire system applied to the civil aircraft was described. The development trend of the redundant method of the flight control system, data communication system, control surface actuation system and the control laws implemented by the Fly-By-Wire system of the civil aircraft are discussed.

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Research Trend in Screw Compressor Development (스크류 압축기의 연구개발 동향)

  • Lee, Dae-Young;Kim, Youngil;Nam, Leem Woo
    • 유체기계공업학회:학술대회논문집
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    • 1998.12a
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    • pp.151-158
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    • 1998
  • The screw compressor is first invented by a Swedish engineer, Alf Lysholm in 1934. Since then, the development of the screw compressor idea for industrial applications has been continued by the Swedish research organization Svenska Rotor Maskiner, often identified by its initials SRM. The first industrial application of the machine was marketed as an air compressor in the 1950s. The screw compressor which is a positive displacement type compressor compresses gases by the rotation of a pair of mating rotors. The operation of this compressor is entirely rotary and dynamically in balance. Also there is no need for any valve mechanism and there exists less mechanical wear between the parts compared to the conventional reciprocating compressors. Due to these prominent features, the screw compressor has been rapidly spread into the air compressor market replacing the conventional reciprocating compressors and begun to be applied as a refrigerant compressor since the 1960s. In this work, the operation principle of the screw compressor is described in brief and the major design parameters affecting the compressor performance are classified. The international research trend in screw compressor development is introduced and the current situation in our country is described.

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Current Trend of Studies on 'Culture' in the field of Environmental Design (국제학술논문에 나타난 '문화' 에 관한 연구의 최근 경향 분석 - 환경디자인 분야를 중심으로 -)

  • 박지연;이연숙
    • Korean Institute of Interior Design Journal
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    • no.38
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    • pp.21-29
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    • 2003
  • This study began to classify the studies on 'culture' in the field of environmental design overall. The classifying process adopted not the approach to preselect the criteria but the phenomenological inductive approach and content analysis method focusing on environmental design in order to understand which place the environmental design had taken. As a result, following aspects were reviewed: what is the area in which the studies on culture is made under the environmental design; what is the trend of using the word 'culture' in terms of logical connection; what is the level of approach to culture from the viewpoint of search, correspondence or application stage. On the whole, followings were drawn as conclusions. First, the interest of the studies on culture has been increased with time especially in the field of interior design. Second, the word 'culture' has become to be used a lot as 'cultural', and was used together with traditional, enterprise and material. Lastly, culture was studied at a starting point by and large. Although the papers, the objects of this study, are confined to five kinds of journals, the analysis of them is helpful to preestimate the trend of studies on culture because they have propensity to lead the international professional academic world.

A Study on Brand of Interior space on the Basis of Marketing Strategy - Focused on the Spa and Cosmetic - (마케팅 전략을 기본으로 한 실내공간의 브랜드화에 관한 연구 - Spa와 Cosmetic을 중심으로 -)

  • Kim, Hyun-Jeong;Ahn, Hee-Young
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2007.05a
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    • pp.248-254
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    • 2007
  • A center of economy, during last 50 years, has been transferred from production into consumption and a new consumption culture has been made by changing from reasonable trend into subjective and psychological trend. In the past, an interest of consumers was to possess things, however, in present, an interest of them is mental value and satisfaction to experience various cultures, to focus value and meaning human's life, and to realize desires. According to this trend, society's interest on interior design has continuously increased. Social phenomenon to make a serious consideration of design management and value is rushing with various brands on the basis of marketing strategy. In this kind of era, interior designers also should try to make interior design area brand through long, objective and systematic marketing plan. Therefore, this research shows differentiation strategy to make interior design brand on the basis of marketing strategy with theoretical background through literature study, and presents an example of spa and cosmetic beauty salon - current new consumption culture - on the basis of marketing strategy.

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The Effect of Ambivalent Fashion Consuming Tendency on Continuous Information Search and Fashion Store Selection (양면적 패션소비성향이 지속적 정보탐색과 패션점포선택에 미치는 영향)

  • Kim, Ju Hee
    • Korean Journal of Human Ecology
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    • v.24 no.4
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    • pp.571-586
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    • 2015
  • This study examined the effect of ambivalent fashion consuming tendency on continuous information search and fashion store selection. Surveys period was from Jan. 8th to Jan. 20th in 2014. The subjects of this study were the young 218 women who had the shopping experiences with ambivalent fashion consuming tendency in their 20s of Pusan and Kyung-nam. These surveys referred to the relevant preceding researches and were completed by some pilot researches (focus group interview, paper-pencil test). The data was analyzed by frequency analysis, reliability analysis (Cronbach's α), factor analysis and regression analysis. The main results of this study were summarized like following: First, this study was based on the definition and characteristics of the ambivalent fashion consuming tendency. The current ambivalent fashion consuming tendency consisted of price ambivalence, trend ambivalence and brand ambivalence. The consumer's demographic characteristics affected trend ambivalence, brand ambivalence. Second, continuous information search was composed of entertaining information search and rational information search. Third, ambivalence fashion consuming tendency had a strong influence on continuous information search (information search and share activity). Forth, the price ambivalence, trend ambivalence and brand ambivalence, which is the factors of ambivalent fashion consuming tendency, significantly impacted on selecting the fashion store. In conclusion, ambivalent fashion consuming tendency is main related factor impacting on continuous information search and fashion store selection.

The Changing Aspect of Appearances in Male Fashion Magazines (남성패션잡지에 나타난 외모의 변화양상)

  • Park, Su-Jin;Park, Kil-Soon
    • Korean Journal of Human Ecology
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    • v.17 no.1
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    • pp.105-114
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    • 2008
  • This study aims on observing the social recognition and its aspects for men taking care of their outer appearances at current point where men are rapidly rising as the main consumer in the beauty industry while their interest for outer appearances are increasing. Therefore, we observed the overall trend and changes in social recognition for male looks by analyzing the contents of articles in fashion magazines that play the critical role of spreading the trend while suggesting and delivering the diverse trend changes to the public to correspond to the individual and concrete demands of certain class segmented into gender, age, hobby, and more. As a result, articles related to outer appearances were divided into fashion, cosmetic and skin, hair and scalp, body figure care, cosmetic surgery, and others, and among them, fashion category took up the highest ratio. Also, articles related to outer appearances increased even more according to the change in time, where articles related to fashion and hair increased while articles of other categories decreased.

An Analysis on the Recent Research Trend in Korean Elementary Science Education (한국초등과학교육의 최근 연구 동향 분석)

  • Lee, A-Ram;Hong, Young-Sik
    • Journal of Korean Elementary Science Education
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    • v.32 no.3
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    • pp.260-268
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    • 2013
  • With the development of science and technology, an effort to investigate the current research trend of elementary science education will lead to future directions for elementary science education. This study set out to analyze papers published in Elementary Science Education by quantity, subject and methodology for the last ten years. The results were as follows: First, the number of papers has continuously increased for the last 30 years. Second, as for categorization by the functions of elementary science education, the number of papers was mainly published in the field of teacher education, which was followed by learning processes and teaching methods in the order. Third, in the field of the research subjects of elementary science education, many researches were conducted on scientific inquiries and concepts traditionally emphasized in elementary science education, and on gifted education recently implemented as part of national policy. Fourth, as for categorization by the methodologies of elementary science education, a survey study was the most popular, being followed by experimental study and literature study in the order. In recent years, researches based on the case study methodology have visibly grown in numbers, which seems to part of efforts to find implications with new methodologies among researchers facing limitations with the old ones in the middle of uniqueness called education.