• 한국과학교육학회지
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• 제23권4호
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• pp.375-385
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• 2003

In an effort to provide information about the effect of Microcomputer-Based Laboratory (MBL) use in science teaching and learning on student achievement and attitudes, a review of research analyzed studies was done between 1981 and 2001, using a meta-analysis procedure. Thirty-seven published and unpublished studies were reviewed. Use of MBL was shown to be potentially effective in the following condition of class; two students, physics teaching, more than one topic, or at the college level. Appropriate research design strategies, financial support (including hardware and software), and the use of more than one instrument for assessing the effect of the MBL instruction are crucial factors for more informative research studies. While helpful in many respects, the prior research revealed a number of problems related to the use of MBL in school science teaching and learning. The prior research does not support the desired intention described in the theory-based outcomes and reveals so little about how teachers and students use MBL, how it influences their teaching and learning, and how effectively it fits into the existing science curriculum. In order to know if the integration of MBL in the existing school science is worth it or not, more careful research design and comprehensive research should be done.

• 한국치위생학회지
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• 제22권4호
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• pp.259-272
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• 2022

Objectives: To identify the factors influencing the turnover intention of registered South Korean dental hygienists and analyze the effect sizes. Methods: Overall, 54 studies based on criteria of PICO from 1 January 2000 to 11 January 2022 were extracted. The factors related to turnover intention were applied to the ecological system theory and categorized. Subsequently, the effect size of the correlations was comprehensively meta-analyzed by dividing it into protective and risk factors depending on the negative or positive correlation direction. Results: For the overall effect size, the protective factor (ES_r=-0.458) was higher than the risk factor (ES_r=0.352). In the protective factors, organizational commitment and perceived organizational support belonging to the microsystem yielded the largest effect size. Furthermore, as for risk factors, burnout, job stress, work harassment, role conflict, and emotional labor belonging to the microsystem showed a moderate effect size. Conclusions: Factors belonging to the microsystem demonstrated a large effect size in both protection and risk factors for dental hygienists' turnover intention. Additionally, the factor showing the largest effect size was protective factor categorized into a microsystem.

• 한국전자거래학회지
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• 제5권1호
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• pp.159-192
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• 2000

In spite of seemingly conflicting findings, a meta-analysis of studies published between 1971 and 1998 demonstrates an unambiguous relationship between attitude and IS use. The apparent contradictions arise principally because of methodological inconsistencies in the way that attitude was measured (belief or affect) and the timing of the measurement of attitude vis-5-vis the use of the technology. We found that the affective dimension of attitude is more powerful than the cognitive dimension for explaining IS use. However, neither is particularly strong in predicting future use.

• 패션비즈니스
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• 제18권3호
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• pp.14-28
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• 2014

The purposes of this study are to provide comprehensive reviews on multichannel consumer behaviors published in peer-reviewed academic journals from 2005 to 2014, to develop a conceptual framework that demonstrates multichannel determinants such as psychographics, demographics, social influences, and situational factors on consumers' search and purchase behavior based on customers' profits or costs judgment, and to provide possible direction for future research in multichannel consumer behavior. Three steps were taken in the process of analyzing consumers' channel determinants presented in the 37 studies, and 12 most frequently used factors that appear in the studies were extracted. These factors include convenience, service, trust/risk, saving money, product knowledge, experience, efficacy/usefulness, involvement, shopping environment/situation factors, demographics, product types, and social influence. With 12 determinants of multichannel consumers' search and purchase behavior, a conceptual framework was proposed based on expectancy theory. The directions for future research were also discussed.

• Bulletin of the Korean Chemical Society
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• 제23권2호
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• pp.337-345
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• 2002

The equilibrium structures for the ground and transition states of $C_7H_7^+$ isomers have been investigated using sophisticated ab initio quantum mechanical techniques with various basis sets. The structures of tropyrium and benzyl cations have been fully optimized at the DZP CCSD(T) levels of theory. And the structures of o-, m-and p-tolyl cations are optimized fully up to the DZ CCSD(T) levels of theory. The geometries for the transition states between three isomers of tolyl cations have been optimized up to DZP CISD level of theory. The SCF harmonic vibrational frequencies for tropylium, benzyl, and three isomers of tolyl cations are all real numbers, which confirm the potential minima and each unique imaginary vibrational frequencies for TS1 and TS2 confirm the true transition states. The relative energy of the benzyl cation with respect to the tropyrium cation is predicted to be 28.5 kJ/mol and is in good agreement with the previous theoretical predictions. The 0 K heats of formation, ${\Delta}H^{\circ}_{f0}$, have been predicted to be 890, 1095, 1101, and 1110 kJ/mol for tropylium, ortho-, meta-, and para-tolyl cations by taking the experimental value of 919 kJ/mol for the benzyl cation as the base level. The relative stability between tolyl cations is in the order of ortho

• 한국빅데이터학회지
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• 제2권2호
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• pp.47-56
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• 2017

통합기술수용모형(UTAUT)은 기술수용모형(TAM, Technology Acceptance Model)의 한계점을 개선하기 위해 8가지의 기존 이론을 종합하여 제시된 것으로, 최근 신기술의 수용 및 확산과 관련된 다양한 분야에서 활용되어지고 있다. 본 연구는 메타분석을 통하여 UTAUT를 이용한 연구의 주요요인에 대해 분석과 연구모형의 일관성에 대한 검증을 하였다. 이를 통해 주요요인의 관계와 추가적 요인에 대한 결과를 제시하고 해석하였다. 아울러 선행연구와의 비교분석을 통해 차이점과 시사점을 제시하였다. 메타분석 결과, 추가적 요인으로 만족감, 쾌락동기, 태도, 지각된 즐거움이 중요한 것으로 분석되었으며, 이 결과를 바탕으로 확장된 UTAUT 모형을 제시하였다. 또한, 국내 연구의 경우 행동의도를 높이는 활동이 실제 행동으로 이어지는데 가장 중요한 요인으로 나타났다. 본 연구의 결과는 신기술이나 신제품의 수용 및 확산을 연구하는 연구자 및 신제품을 출시하고자 하는 기업에 도움을 제공할 것으로 예상한다.

• Asian Journal for Public Opinion Research
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• 제5권1호
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• pp.41-62
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• 2017

The political reformation in Indonesia is a determinant factor of the change in political communications and the roles of media. Currently, the political elites need media support, since it contextually has a significant role. Whoever has a good relationship with the media, will be loved by the public. On the other hand, the media also have a vested interest in the elite in running businesses and building the power of industry. Policies and capital pose a challenge to maintaining the continuity of the media. Independence and control of media are at stake, when the interests of the media and the elite collaborate with each other and then build a benefit on both sides. Meanwhile, the role of social media also cannot be neglected. The Indonesian political communication system is characterized by the presence of social media in a pseudo-relationship between the elite and the public. This paper tries to explain the growing trends of research in the academic environment and the research trends in political practice in Indonesia after the occurrence of post-reformation era in legislative and executive elections. The method used is the meta-analysis of research outcomes of university (dissertations) and secondary data sources. Data processing is done by meta-analysis of secondary data. The results of meta-analysis research indicate that, the objective conditions, in Indonesia, especially the political conditions, stimulate new spaces in communication research. The study of political communication becomes dominant in the academic environment. In addition, communication research is also characterized by a shift from the linear perspective (positivistic paradigm) to the interactive perspective (naturalistic paradigm). On the other hand, the development of politic and governance situations in Indonesia has prompted the establishment of polling agencies that help citizens understand the maps of political power and candidates in general elections and regional head elections.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2012년도 추계학술대회
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• pp.169-170
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• 2012

해상교통안전진단제도 도입('09.5.27) 이후 합리적 효율적인 제도 시행을 위한 노력은 계속되어 왔다. 하지만 최근에는 안전진단이 제대로 수행되고 있는지, 이에 의해 도출된 진단결과가 의미가 있는지 등 제도의 가치문제에 대한 논란이 이해당사자들을 중심으로 제기되고 있으며, 이러한 논의들은 진단에 대한 타당성 및 당위성을 찾지 못한 데서 기인하는 것으로 현 시점에서 제도에 대한 종합적이고 체계적인 검토를 통해 바람직한 제도를 정립해 나갈 필요가 있다. 본 연구에서는 평가에 대한 평가, 즉, 메타평가에 관한 이론을 적용, 문헌 연구와 전문가검토, 설문조사 등의 방법을 활용하여 안전진단의 분석 틀로서의 평가 모형을 설계하고, 검증을 통해 안전진단 평가에 적합한 메타평가 모형을 제시하였다. 본 연구결과가 해상교통안전진단의 메타평가 지표로서 활용되어 진단활동에 대한 전반적인 평가를 통해 제도 개선에 기여할 것으로 기대된다.

• Journal of Ginseng Research
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• 제47권4호
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• pp.493-505
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• 2023

In recent years, an increasing number of reports have explored the wound healing mechanism of these two traditional Chinese herbal medicines- Panax ginseng and Panax notoginseng, but there is no systematic research on the related core functions and different mechanisms in the treatment of wound healing up to now. Based on network pharmacology and meta-analysis, the present work aimed to comprehensively review the commonality and diversity of P. ginseng and P. notoginseng in wound healing. In this study, a wound healing-related "ingredients-targets" network of two herbs was constructed. Thereafter, meta-analysis of the multiple target lists by Metascape showed that these two medicines significantly regulated blood vessel development, responses to cytokines and growth factors and oxygen levels, cell death, cell proliferation and differentiation, and cell adhesion. To better understand the discrepancy between these two herbs, it was found that common signaling pathways including Rap1, PI3K/AKT, MAPK, HIF-1 and Focal adhesion regulated the functions listed above. In parallel, the different pathways including renin-angiotensin system, RNA transport and circadian rhythm, autophagy, and the different metabolic pathways may also explained the discrepancies in the regulation of the above-mentioned functions, consistent with the Traditional Chinese Medicine theory about the effects of P. ginseng and P. notoginseng.

• 감성과학
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• 제20권4호
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• pp.15-30
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• 2017

본 연구의 목적은 뇌 영상 기술을 활용한 정서 연구를 근거로 기본정서 이론을 확인하는 것이다. 이를 위해 기능적 자기공명영상(functional magnetic resonance imaging, fMRI) 연구들에 대한 메타분석을 수행했다. 기본정서 이론을 확인하기 위해 즐거움, 행복, 공포, 분노, 혐오, 슬픔의 6개 개별정서를 선정했다. 개별정서의 fMRI 자료를 수집하기 위해 최근 10년간 289편의 fMRI 연구를 조사했으며, 이중에서 69편이 포함 기준을 충족시켰다. 6개 정서에 대해서 건강한 피험자들을 대상으로 실험한 fMRI 자료를 수집했으며, Talairach 또는 MNI 표준 좌표로 보고된 연구만을 포함시켰다. Talairach와 MNI 좌표 체계간의 차이를 없애기 위해 Talairach 좌표를 기준으로 분석하였다. 활성화 가능성 추정(ALE) 기법을 이용한 GingerALE 2.3 프로그램을 사용하여 메타분석을 수행했다. 연구 결과 기본정서 이론의 관점에서 개별정서들이 일관되고 구별 가능한 국부적인 뇌 반응과 관련 된다는 것을 확인했다. 각각의 개별 정서들과 관련된 뇌 반응 영역에 대한 본 연구의 결과는 선행연구들의 결과와 대체로 일치하였다. 본 연구의 결과를 일반화에 있어서 극복해야 할 제한점을 기술하고 후속 연구에 대해 몇 가지를 제언하였다.