• 제목/요약/키워드: Comparative research

검색결과 6,591건 처리시간 0.037초

비만에 대한 절식요법의 임상연구 고찰: 국내 한의학 연구 중심으로 (Review of Clinical Study on Fasting for Obesity: Focused on Korean Medicine Research)

  • 박원형;차윤엽
    • 한방비만학회지
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    • 제16권1호
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    • pp.50-63
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    • 2016
  • Objectives: The aim of this study is to analyze methods and outcomes about fasting for obesity in korea medicine research. Methods: We searched the studies with key words of 'obesity' and 'fasting or starvation' in Korean database (Korean traditional knowledge portal, OASIS, KISS, KMBASE, DBPIA, RISS). Studies were analyzed for contents, evaluation methods and adverse effects. Results: Twenty-one studies were reviewed. Studies were published in 1983~2015. 1. Studies can be classified into three types: comparative study on before and after, comparative study between groups, case study on other disease occurred during the fasting therapy period. 2. The most common step of fasting were 3 steps: reducing food intakes period (3~5 days), fasting period (7~10 days) and refeeding period (3~5 days) and additional period-diet period (28 days). 3. The most common evaluation methods were body weight (BW), body fat mass (BFM), muscle weight (MW), fat free mass, body mass index, body fat percentage, etc. 4. BW, BFM, MW were reduced largely in fasting period. 5. The most common adverse effects were fatigue, nausea, headache, vomiting, insomnia, etc. Conclusions: As a result of the review papers, fasting therapy have positive effects for obesity. To verify the effectiveness of the fasting, more studies are needed such as randomized controlled trial.

Comparative Analysis of Completely Sequenced Insect Mitochondrial Genomes

  • Lee, Jin-Sung;Kim, Ki-Hwan;Suh, Dong-Sang;Park, Jae-Heung;Suh, Ji-Yoeun;Chung, Kyu-Hoi;Hwang, Jae-Sam
    • International Journal of Industrial Entomology and Biomaterials
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    • 제2권1호
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    • pp.1-6
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    • 2001
  • This paper reports a few characteristics of seven insect mitochondrial genomes sequenced completely (Bombyx mori, Drosophila melanogaster, D. yakuba, Apis mellifera, Anopheles gambiae, A. quadrimaculatus, and Locusta migratoria). Comparative analysis of complete mt genome sequences from several species revealed a number of interesting features (base composition, gene content, A+T-rich region, and gene arrangement, etc) of insect mitochondrial genome. The properties revealed by our work shed new light on the organization and evolution of the insect mitochondrial genome and more importantly open up the way to clearly aimed experimental studies for understanding critical roles of the regulatory mechanisms (transcription and translation) in mitochondrial gene expression.

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서해상과 연안지역의 풍력기상자원 비교평가 (Comparative Assessment of Wind Resources Between West Offshore and Onshore Regions in Korea)

  • 김대영;정형세;김연희;김백조
    • 대기
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    • 제28권1호
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    • pp.1-13
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    • 2018
  • Characteristics of wind resources of offshore and coastal regions were compared using wind data obtained from HeMOSU-1 (Herald of Meteorological and Oceanographic Special Unit-1) meteorological mast located at Southwestern Sea, and ground-based LiDAR (Light Detection And Ranging) at Gochang observation site near it. The analysis includes comparison of basic wind statistics such as mean wind speed, wind direction, power law exponent and their temporal variability as well as site assessment items for the wind power plant such as turbulence intensity and wind power density at the two observation sites. It was found that the wind at HeMOSU-1 site has lower diurnal and seasonal variability than that at Gochang site, which lead to smaller turbulence intensity. Overall, the results of the comparative analysis show that the wind resource at HeMOSU-1 site located offshore has more favorable condition for wind power generation than the wind resource at Gochang which shows nature of coastal area.

대기분진의 원소분석에 대한 k0-NAA법의 비교 (Comparative Analysis of Elemental Components in Airborne Particulate Matter by k0-NAA Methods)

  • 정용삼;문종화;조현제;김영진
    • 분석과학
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    • 제18권1호
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    • pp.51-58
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    • 2005
  • A comparison of the analytical data obtained by three $k_0$-NAA software programs was carried out using both the airborne particulate matter collected from an urban site and the certified reference materials of the air filter and urban dust to evaluate the performance of the analysis. The individual $k_0$-NAA standardization methods of three countries, Korea, China and Vietnam which had been modified from the well established $k_0$-program were used for the comparative analysis. The measured concentrations of 30 elements from the two kinds of air samples based on this software were in agreement with each other within about 20% analytical error except for a few elements. By contrast, the results of China and Vietnam were moderately higher than that of Korea due to a systematic error associated with the detection efficiency, gamma peak analysis and geometric effect.

한, 미, 일 3국 기업의 인터넷 활용단계 및 발전모델연구 - 시계열 분석을 중심으로 - (Comparative Analysis of Levels of Internet Usage and Developments in Companies among Korea, U-S., and Japan)

  • 서영호;채영일;이현수
    • 품질경영학회지
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    • 제30권1호
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    • pp.47-60
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    • 2002
  • Recently, the range of using Internet in business is expanding rapidly. And through Internet, companies are strengthening both their internal efficiency and their external competitive advantage in the market. In recent years, building and managing companies' web sites are becoming unavoidable tasks in business. Such a trend is becoming more imperative in business over the world. There is a great deal of research in progress to study the cases of companies with increasing performance from the use of their Internet web sites. But it is considered that there has not been enough of study in the area of levels of Internet application in business especially in strategic areas and application levels among countries. This research is in the same line of the research that was carried out on such topics in 1999. study in 1999 showed that there are significant differences in the usage levels of Internet in business between countries with long history of using Internet and those who are not. The 1999 study also suggested the model on development stages of Internet usage in business. This study is the continuation of the 1999 research and used two years of data to compare and analyze the trend of the Internet development stages in leading corporations in Korea, U.S.A., and Japan. This study found that there have been significant developments in the ability to use Internet in business in three countries. The differences in Internet usage level in each stage among different countries are compared and analyzed in this study.

질량분석기형 누출검출기를 이용한 헬륨투과형 표준 누출 비교 교정 장치 개발 (Development of Comparative Calibration System for Helium Leak Standard by Using Mass Spectrometer Type Leak Detector)

  • 홍승수;임인태;김진태;신용현
    • 비파괴검사학회지
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    • 제28권2호
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    • pp.151-156
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    • 2008
  • 반도체나 디스플레이 제조 등 진공공정의 리크검출에는 질량분석기형(mass spectrometer type) 헬륨 리크검출기(leak detector)가 사용되고 있다. 이 기기를 이용해서 안정된 측정값을 얻기 위해서는 장치 내부에 내장된 투과형(permeation type) 표준리크(standard leak)를 이용해서 자주 spectrometer를 교정해야 한다. 본 연구에서 질량분석기형 리크검출기의 비교교정 장치의 개발과 교정방법에 대한 연구결과를 언급하였다. 따라서 이 기술을 이용하면 질량분석기형 리크검출기를 구비하고 있는 현장에서도 표준리크의 비교교정이 가능하게 된다.

A Comparative Study of Coffee Culture between Italy and South Korea: An Exploratory Study

  • Moretti, Raul
    • 아태비즈니스연구
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    • 제8권2호
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    • pp.41-55
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    • 2017
  • This exploratory research compares two particular features of coffee culture, namely the reason why a particular coffee shop is frequented and the reason for going to the chosen coffee shop in Italy and South Korea. A survey was carried out targeted at current undergraduate university students in both countries with data being collected in the late spring and early summer of 2017. The main impetus for this research was to investigate the aforementioned areas given the fact that Italy has such a long standing coffee culture that dates back centuries and is still an industry dominated by independent coffee houses while the Korean coffee industry started developing in the early 1980s and taking off after the 1988 Olympic Games. The Korean coffee industry, in contrast, is driven by the franchise coffee shops such as Starbucks, $Caf{\acute{e}}$ Benne, and The Coffee Bean among others. While both countries have well developed coffee cultures, they developed along very different lines. Data collected from respondents are tabulated and presented followed by an analysis and interpretation of the data. Finally, some suggestions on how to conduct further research in order to better understanding the underpinnings and contributing factors in understanding consumer choice and coffee culture in both Italian and Korea are suggested.

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Screening of Essential Genes in Staphylococcus aureus N315 Using Comparative Genomics and Allelic Replacement Mutagenesis

  • Ko Kwan-Soo;Lee Ji-Young;Song Jae-Hoon;Baek Jin-Yang;Oh Won-Sup;Chun Jong-Sik;Yoon Ha-Sik
    • Journal of Microbiology and Biotechnology
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    • 제16권4호
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    • pp.623-632
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    • 2006
  • To find potential targets of novel antimicrobial agents, we identified essential genes of Staphylococcus aureus N315 by using comparative genomics and allele replacement mutagenesis. By comparing the genome of S. aureus N315 with those of Bacillus subtilis, Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, and Streptococcus pneumoniae, a total of 481 candidate target genes with similar amino acid sequences with at least three other species by >40% sequence identity were selected. of 481 disrupted candidate genes, 122 genes were identified as essential genes for growth of S. aureus N315. Of these, 51 essential genes were those not identified in any bacterial species, and 24 genes encode proteins of unknown function. Seventeen genes were determined as non-essential although they were identified as essential genes in other strain of S. aureus and other species. We found no significant difference among essential genes between Streptococcus pneumoniae and S. aureus with regard to cellular function.

Comparative proteomic analysis of Celastrus hindsii Benth. phenotypes reveals an intraspecific variation

  • Nguyen, Van Huy;Pham, Thanh Loan;Ha, Thi Tam Tien;Hoang, Thi Le Thu
    • Journal of Plant Biotechnology
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    • 제47권4호
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    • pp.273-282
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    • 2020
  • In Vietnam, Celastrus hindsii Benth, a medicinal plant rich in secondary metabolites, has been used to alleviate distress caused by ulcers, tumors, and inflammation for generations. The occurrence of two phenotypes, Broad Leaf (BL) and Narrow Leaf (NL), has raised questions about the selection of appropriate varieties for conservation and crop improvement to enhance medicinal properties. This study examined molecular differences in C. hindsii by comparing protein profiles between the NL and BL types using 2D-PAGE and MS. Peptide sequences and proteins were identified by matching MS data against the MSPnr100 databases and verified using the MultiIdent tool on ExPASy and the Blast2GO software. Our results revealed notable variations in protein abundance between the NL and BL proteomes. Selected proteins were confidently identified from 12 protein spots, thereby highlighting the molecular variation between NL and BL proteomes. Upregulated proteins in BL were found to be associated with flavonoid and amino acid biosynthesis as well as nuclease metabolism, which probably attributed to the intraspecific variations. Several bioactive proteins identified in this study can have applications in cancer therapeutics. Therefore, the BL phenotype characterized by healthier external morphological features has higher levels of bioactive compounds and could be better suited for medicinal use.

모바일 광고 수용의도 영향요인에 관한 국가간 비교연구 : 한국, 미국, 일본간 비교를 중심으로 (A Comparative Study Between Nations on the Factors Affecting Mobile Advertisement Acceptance : Focusing on me Comparison Among Korea, U.S. ana Japan)

  • 김효정;유상진
    • 한국산업정보학회논문지
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    • 제14권5호
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    • pp.209-225
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    • 2009
  • 본 연구는 모바일광고에 대한 소비자들의 수용의도 영향요인에 대해 연구하였다. 본 연구는 한국뿐 아니라 미국 일본의 모바일 사용자를 대상으로 설문 조사하였다. 본 연구에서는 정보기술수용모델인 TAM과 플로우 이론을 중심으로 오락성, 정보성, 신뢰성, 불편함, 플로우경험, 태도 및 수용의도를 연구변수로 채택하였다. 또한 본 연구는 시장의 규모나 환경이 서로 다른 3개국의 모바일 사용자를 대상으로 비교연구를 시도하고자, 한국, 미국, 일본에서 모바일을 사용하고 있는 일반인 및 학생을 대상으로 데이터를 수집하였다. 본 연구는 아모스 통계패키지를 이용한 구조방정식 모형을 통해 연구모형의 적합도를 검증하였다.