• Title/Summary/Keyword: Comparative Research

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

  • Hong, Seung-Soo;Lim, In-Tae;Kim, Jin-Tae;Shin, Yong-Hyeon
    • Journal of the Korean Society for Nondestructive Testing
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    • v.28 no.2
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    • pp.151-156
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    • 2008
  • Many kinds of mass spectrometer type leak detectors have been widely used for detecting leak of vacuum processes in semiconductor and display industries etc. The leak detectors should be often calibrated by the permeation type standard leak in order to ensure accurate and reproducible leak measurement. We have developed a comparative calibration system for permeation type standard leak by using mass spectrometer type leak detector and specification of the calibration method. Following this technique the reliable calibration for leak standard ran be performed even in fields.

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

  • Moretti, Raul
    • Asia-Pacific Journal of Business
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    • v.8 no.2
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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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    • v.16 no.4
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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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    • v.47 no.4
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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.

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

  • Kim, Hyo-Jung;Yoo, Sang-Jin
    • Journal of Korea Society of Industrial Information Systems
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    • v.14 no.5
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    • pp.209-225
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    • 2009
  • This research has been studied to analyze affecting factors for the consumer's acceptance to mobile advertisement by worldwide survey into mobile users of Korea, U.S. and Japan. Based on TAM & Flow theory, our research adopts some factors for a theoretical model such as entertainment, information, irritation, credibility, flow experience, attitudes and acceptance intention. And our research collects data from common consumers & students of each countries to try comparative study with mobile users who has different scope & environment of markets. This data was analyzed based on using AMOS, the structural equation modeling and a second-generation multi variant technique, and has gained distinct advantages over other technique.

Comparative Modeling and Molecular Dynamics Simulation of Substrate Binding in Human Fatty Acid Synthase: Enoyl Reductase and β-Ketoacyl Reductase Catalytic Domains

  • John, Arun;Umashankar, Vetrivel;Krishnakumar, Subramanian;Deepa, Perinkulam Ravi
    • Genomics & Informatics
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    • v.13 no.1
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    • pp.15-24
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    • 2015
  • Fatty acid synthase (FASN, EC 2.3.1.85), is a multi-enzyme dimer complex that plays a critical role in lipogenesis. This lipogenic enzyme has gained importance beyond its physiological role due to its implications in several clinical conditions-cancers, obesity, and diabetes. This has made FASN an attractive pharmacological target. Here, we have attempted to predict the theoretical models for the human enoyl reductase (ER) and ${\beta}$-ketoacyl reductase (KR) domains based on the porcine FASN crystal structure, which was the structurally closest template available at the time of this study. Comparative modeling methods were used for studying the structure-function relationships. Different validation studies revealed the predicted structures to be highly plausible. The respective substrates of ER and KR domains-namely, trans-butenoyl and ${\beta}$-ketobutyryl-were computationally docked into active sites using Glide in order to understand the probable binding mode. The molecular dynamics simulations of the apo and holo states of ER and KR showed stable backbone root mean square deviation trajectories with minimal deviation. Ramachandran plot analysis showed 96.0% of residues in the most favorable region for ER and 90.3% for the KR domain, respectively. Thus, the predicted models yielded significant insights into the substrate binding modes of the ER and KR catalytic domains and will aid in identifying novel chemical inhibitors of human FASN that target these domains.

Consumer Perception Survey for the Improvement of Nutrition Labeling (Nutrition Comparative Claim) on Sodium Content (가공식품의 나트륨함량표시 개선을 위한 소비자 인식도 조사)

  • Kang, Eun-Jin;Lee, Hwa Jung;Hwang, Kyung Mi;Koo, Yong Eui;Kim, Gun-Hee
    • Journal of the Korean Society of Food Culture
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    • v.32 no.3
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    • pp.244-257
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    • 2017
  • Nutrition labeling can provide information in order for people to select products suitable for their own health, and sodium content labeling for processed foods is important since sodium is one of the main causes of cardiac diseases. This study had carried out to propose the desirable sodium content labeling by conducting surveys on the awareness of sodium content in processed foods, understanding of sodium content labeling, and requirements for new sodium comparative claims. The survey period was from 12th of September, 2016 through the 24th, during which a self-administered questionnaire survey was given to 1,003 persons through demographic quota sampling by age and region. As a result of the survey, 66.0% of respondents assuring nutrition labeling answered they check sodium content labeling, whereas 83.2% were aware of excessive intake of sodium having a negative effect on health. Exactly 49.9% of respondents answered that the current system for nutrition labeling on processed foods does not help one to understand the content of sodium, whereas 72.9% answered they wanted to compare sodium contents with those of other products when buying or taking processed foods. As 92.5% cited the importance of sodium comparative claims made by processed foods, preparation of a new system for food labeling should be considered by which consumers can easily compare sodium contents with those of other similar products.

Comparative Analysis of the Perception of Family Functioning by Heads of Families with and without Cancer Members During Illness

  • Sahebihagh, Mohamad Hasan;Amani, Leila;Salimi, Saleh;Feizi, Aram;Khalkhali, Hamid Reza;Atri, Shirin Barzanjeh
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.9
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    • pp.4275-4279
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    • 2016
  • Background: Cancer is a major health problem due to the aging population with increasing deaths. Family functioning is affected by cancer diagnosis and treatment. The aim of this study was to comparative analysis of the perception of family functioning by heads of families with and without cancer members during illness, focusing on changes or probable changes. Materials and Methods: This comparative study was conducted on two groups (families with a member of the cancer and controls without a family member with cancer). The families were of patients referred to the clinics and hospitals of Imam Khomeini, Taleghani and Omid of Urmia city, the number of samples being 148 for cases and 176for the control group. To collect the data, valid and reliable family functioning (FAD) was applied, a 60-item questionnaire with seven dimensions, with heads of families. To analyze the data SPSS- 23 Software was used for descriptive and analytical statistics. Significance level was defined p <0.05. Results: Among the seven items : problem solving, communication, roles, emotional response, emotional involvement, behavior control and overall functioning, only differences for average scores of problem-solving were statistically significant. Discussion: Contrary to common perception of severe damage for family functioning in families with cancer members, results of this study indicate that functioning in terms of family caregivers is more or less similar to that of the families with other diseases. Only in problem-solving item do these families experience more difficulty. Conclusion: According to the research findings, in nursing from families with cancer patient, it is recommended to focus more on the problem-solving item of the families.

Comparative Study on the Health Promotion Policy in Korea and Japan (한국과 일본의 건강증진정책 비교)

  • 남은우;조은주;남정자
    • Korean Journal of Health Education and Promotion
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    • v.21 no.3
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    • pp.19-33
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    • 2004
  • The focus of this paper is to critically evaluate the contemporary health promotion policy of g Korea and Japan. The primary purpose of this comparative research project is to stimulate policy debate and to strengthen the design and implementation of evidence-based policies that improve population health and reduce health related disparities. For the purpose of the research object we adopted analysis of health promotion(HP) sources. The HP Source which is still under development in Europe, is a potentially valuable tool for global use. This European Commission funded project lead by the London School of Hygiene and Tropical Medicine has brought together organisations from all of the European Union Member States, plus Norway, Iceland, Latvia, Switzerland and the Czech Republic to contribute their data. The findings of this research will be conclude by making recommendations for further comparative studies and in particular how EUHPID and the HP Source tool and database can be expanded for use at global level through the IUHPE. The result as follows: 1. The Health Promotion Act enacted 1995 in Korea and 2000 in Japan. The government has a national document on HP titled Health Plan 2010 and Healthy Korea 2010 in Korea and Healthy Japan 21 in Japan. 2. The Health Plan 2010 of Korea contains 14 goals, i.e. life expectancy, smoking, nutrition, mental health, dental health, reproductive health, hypertension, cerebrovascular diseases, arthritis, diabetes mellitus, cardiovascular diseases, and cancer. It should be emphasized that the Korean HP national document adds 3 goals of health expectancy, reproductive health, and arthritis to its Japanese counterpart. Health Plan 2010 of Korea specifies 37 objectives in 14 goals, and Healthy Japan 21 proposes 48 objectives and 80 targets in 9 goals. 3. Health Plan 2010 and Healthy Japan 21 have not been evaluated yet, and no regular systematic monitoring reporting of HP policies is available in Korea and Japan yet. 4. National Health Promotion Fund is a financial source of HP programs at the national level in Korea. Its annual amount is 736 billion Won(equivalent to approximately 640 million US$), otherwise no specific Health Promotion Fund in Japan.

Comparative Study on Historical changes of Practical Arts Education and Technology-Home Economics Education in Korea and japan (한국과 일본의 실과 및 기술.가정과교육의 역사적 변천 비교)

  • 박순자;신상옥
    • Journal of Korean Home Economics Education Association
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    • v.12 no.3
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    • pp.65-76
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    • 2000
  • Comparative Study on Historical Changes of Practical Arts Education and Technology-Home Economics Education in Korea and Japan This dissertation is a comparative study on Practical Arts(Home Economics) Education and Technology-Home Economics Education of Korea and Japan. I established two research objectives to conduct the research : To understand the differences in historical changes in Practical Arts Education and Technology-Home Economics of the two countries: And to grope for the new direction of Home Economics Education. Research findings are as follows : Japan was also ahead of Korea for about two decades in terms of putting Home Economics Education in practice at elementary schools. Practical Arts Education Started to emerge in Elementary school system in 1955, which had been originated in vocational education before the year 1945 in Korean However, from the 3th curriculum Practical Arts Education Curriculum put emphasis on home lives. Regarding the characteristics of education from the perspectives of historical changes at Korean Junior-high schools after the year 1945. Home Economics Education had been regarded as “female subject”until the 1980s and was integrated into regular curricula for co-education in the middle of the 1990s. when the 6th Curriculum was activated. Technology-Home Economics started to emerge in Japan in 1962. while the subject Home Economics Education was integrated into curricula for males in high school as well in 1989. In the Korean 7th Curriculum, the combined subject Technology-Home Economics is divided into three categories. A remarkable difference from japanese Technology-Home Economics is that korean curriculum has no division between required and elective. In conclusion. I observe that both Korean and Japanese curricula for Home Economics Education were originated in Confucianism. However, unlike Korean situation, current Japanese Home Economics Education takes a significant part as a continuing and required subject for both primary and secondary co-education.

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