• 제목/요약/키워드: North America

검색결과 706건 처리시간 0.03초

New Record of a Naidid Oligochaete Species, Ripistes parasita (Annelida: Clitellata: Naididae) from Korea

  • Jung, Jong-Woo
    • Animal Systematics, Evolution and Diversity
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    • 제28권2호
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    • pp.137-139
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    • 2012
  • An aquatic oligochaete species, $Ripistes$ $parasita$ (Schmidt, 1847) collected from Ganghwado Island in Korea, is described and illustrated. Specimens inhabiting on aquatic vegetation at the edge of the streams were collected with a plankton hand net. Morphological features of present specimens such as the number of long hair chaetae per bundle and their length in VI-VIII, and shape and size of ventral chaetae are concordant with those of previous reports on this species. The genus $Ripistes$ contains one species, $R.$ $parasite$ which is distributed over, Europe, North America and eastern part of Asia including China and Japan. This is the first record of $R.$ $parasita$ in Korea.

목질바이오매스를 이용한 펠릿연료의 제조 (Pellet Fuel from Wood Biomass)

  • 한규성
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2006년도 추계학술대회
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    • pp.521-524
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    • 2006
  • Recently, densified pollet fuel from wood biomass is widely used at North America and Europe as a regenerable and clean carbon neutral bioenergy. High-pressure compaction of sawdust of several species of wood to form a densified fuel was studied. Calorific and elemental analysis were carried out to assess pellet fuels Hot-press process was adopted for compact ion of sawdust and compaction was performed under prescribed condition. Densified fuels were evaluated by its oven-dry density and fines after 5-minute shaking test. The target density and fines of densified fuels were over $1.2g/cm^3$ and below 0.5%, respectively. When the press-temperature is over $60^{\circ}C$ densified fuels with density over $1.2g/cm^3$ and with fines below 0.5% can be produced. And the pressure over $1000kgf/cm^2$ was effect ive for this production.

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An Investigation into Research Productivity in the Journal of Consumer Behavior

  • Shin, Dong-Jin;Huh, Mooyul
    • 유통과학연구
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    • 제13권2호
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    • pp.45-53
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    • 2015
  • Purpose - This study strives to discern trends in research productivity in the Journal of Consumer Behavior. It will identify prolific authors and institutions in articles over ten years (2004-2013). Research design, data, and methodology - The Journal of Consumer Behavior was chosen and articles over ten years were analyzed. Research productivity was determined by categorizing the data into four themes: number of authors per article, author affiliated institutions, a list of prolific authors over a ten-year period, and author-affiliated countries. Results - Authors have a propensity to collaborate on a research paper, yielding a high frequency of articles with two or three authors in a single publication. In addition, author and institution productivity was highest in North America and Europe. Conclusions - The research productivity of the Journal of Consumer Behavior is unprecedented. The trends and insights from this study will allow academics in the area of consumer behavior to observe leading authors and institutions. Moreover, speculations about the leading countries and institutions, not to mention top prolific authors in consumer behavior, will be elucidated in this study.

이주민을 위한 국내 도서관 서비스의 현황 분석 (Current Status of Library Services for Immigrants in Korea)

  • 조용완
    • 한국도서관정보학회지
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    • 제38권2호
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    • pp.245-269
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    • 2007
  • 2007년 현재 국내 체류 외국인이 약 백만명에 다다를 정도로 급격한 증가를 보이고 있는 상황에서 이 연구는 우리나라의 공공도서관과 민간도서관에서 제공하고 있는 이주민 서비스 현황을 분석하고자 하였다. 이를 위해 연구자는 외국의 이주민 도서관 서비스 사례를 검토하고 이주민 서비스를 제공하고 있는 국내 10개 공공도서관과 5개 민간도서관 대상으로 담당자와의 면담을 실시하고 다양한 관련자료를 분석하였다. 이를 통해 국내 도서관의 이주민 서비스의 현황과 한계를 진단하고 그 대안을 제시하고자 하였다.

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2012년 국내외 조명 연구 동향 분석을 통한 연구 방향 제시 (Analysis on the Domestic and International Illumination Research Trends in 2012 and Further Study Suggestion)

  • 박혜리;임동영;최은혁;이광식
    • 조명전기설비학회논문지
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    • 제27권12호
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    • pp.28-37
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    • 2013
  • This paper focuses on the domestic illumination research trends in 2012 based on reviewing the published papers in the Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. It classifies and resumes the papers in five themes including exterior lighting, interior lighting, LED/OLED, optical device and optical fiber, and lighting industry. By comparatively studying a large number of papers published in Japan, North America, and China in the same year, the international illumination research trends are also figured out and further academic research topics are suggested.

순천(順天) 선교촌(宣敎村)의 형성(形成)과 건축특성(建築特性)에 대한 조사연구(調査硏究) (A Research on the Characteristics of Suncheon American Missionary Compound from 1907 to 1945)

  • 도선붕;한규영
    • 한국농촌건축학회논문집
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    • 제4권2호
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    • pp.49-62
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    • 2002
  • The purpose of this study was to investigate and analyze the building process and characteristics of Suncheon American missionary compound-missionary dwellings, medical clinics, schools and churches, for the sake of giving fundamental facts to the researcher of this field. The results of the study is summarized as follows. The construction participants of Suncheon missionary architecture are American supervisor- Rev. Preston, Elder Swinehart and Doctor Timmons, Korean christian labors, Chinese masons and Japanese carpenters. The characteristics of architectures are described as the space composition according to American life style, the architectural form of American colonial style. And also the masonry structure using the Korean domestic stones and bricks and imported various materials- such as the cements, timbers, glasses, doors and windows, etc- from the North America.

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한국 미기록 귀화식물: 마늘냉이(십자화과) (First record of invasive species Alliaria petiolata (M. Bieb.) Cavara & Grande (Brassicaceae) in Korea)

  • 조성현;김영동
    • 식물분류학회지
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    • 제42권4호
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    • pp.278-281
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    • 2012
  • 마늘냉이(Alliaria petiolata (M. Bieb.) Cavara & Grande)는 유럽과 서남아시아 원산의 십자화과 침입식물로서 현재 북미의 삼림 하부를 교란시키고 있는 것으로 알려져 있다. 이 종이 강원도 삼척시의 길가 숲을 따라 침입하여 우리나라에도 자라고 있는 것으로 확인되었다. 국내 확산을 막기 위한 기초 정보를 제공하기 위해 이 종에 대한 확인 결과를 보고하고자 한다.

Advanced Technology Trends in Development of Land-Mine Detection Systems

  • Hwang, Sun-Tae;Park, Kil-Oung
    • Nuclear Engineering and Technology
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    • 제33권3호
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    • pp.349-354
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    • 2001
  • While the United Nations UN) agencies work to restrict the manufacture, sale, and use of land-mines worldwide, a massive clean-up effort is needed to find and destroy the estimated 100 million land-mines still buried around the world. Land-mines left behind from wars worldwide are one of the past century's main unsolved problems of war and remain the focus of humanitarian land-mine detection and removal primarily in Europe, Africa, Asia and Central and South America. For example, approximately 1 million anti-personnel mines and other various kinds which have been buried in the 249.4 km (155 miles) demilitarized zone (DMZ) of the Korean peninsular should be completely removed in historical process of the peaceful unification between South and North Korea. In this regard, the current trends of technologies linked to land-mine detection systems are surveyed.

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우리나라 대도시 주차특성과 정비방안 (A study on the parking characteristics and rational parking management tactics in large cities of Korea)

  • 임승달
    • 대한교통학회지
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    • 제4권2호
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    • pp.15-35
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    • 1986
  • As the population of persons and automobiles rapidly grows, parking problems also grow in large cities of Korea. The purpose of this paper is to first grasp the status of parking facilities and characteristics in large cities of Korea; and introduce new directions of CBD parking policies in north America cities: and finally recommend the adequate parking management strategies and tactics for improving parking problems in Korea. For this purpose, field survey for parking inventories, patrol survey for parking usage as observed demand and drive interview survey for parking behavior were conducted. Compared with the parking characteristics and polices of foreign cities, many differences of characteristics were found, and existing parking management policies, which should be improved, were identified. Five categories of parking management strategies were set on; a) Reasonable control of CBD parking demand, b) securing of the public parking facilities c) Promotion of privately operated parking facilities d) expansion of financial resources for parking facilities construction and e) Improvement of existing parking management system. And actural seventeen tactics to attain the above strategies were recommended.

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LPC 분석 알고리즘의 VHDL 구현 (VHDL Implementation of an LPC Analysis Algorithm)

  • 선우명훈;조위덕
    • 전자공학회논문지B
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    • 제32B권1호
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    • pp.96-102
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    • 1995
  • This paper presents the VHSIC Hardware Description Language(VHDL) implementation of the Fixed Point Covariance Lattice(FLAT) algorithm for an Linear Predictive Coding(LPC) analysis and its related algorithms, such as the forth order high pass Infinite Impulse Response(IIR) filter, covariance matrix calculation, and Spectral Smoothing Technique(SST) in the Vector Sum Exited Linear Predictive(VSELP) speech coder that has been Selected as the standard speech coder for the North America and Japanese digital cellular. Existing Digital Signal Processor(DSP) chips used in digital cellular phones are derived from general purpose DSP chips, and thus, these DSP chips may not be optimal and effective architectures are to be designed for the above mentioned algorithms. Then we implemented the VHDL code based on the C code, Finally, we verified that VHDL results are the same as C code results for real speech data. The implemented VHDL code can be used for performing logic synthesis and for designing an LPC Application Specific Integrated Circuit(ASOC) chip and DsP chips. We first developed the C language code to investigate the correctness of algorithms and to compare C code results with VHDL code results block by block.

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