• Title/Summary/Keyword: Experimental Studies

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Power Analysis in Experimental Designs with t test Analysis (t 검정 실험 설계 시 표본 크기 결정에 대한 논의)

  • Kang, Jeong-Hee;Bang, Kyung-Sook;Ko, Sung-Hee
    • The Journal of Korean Academic Society of Nursing Education
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    • v.15 no.1
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    • pp.120-127
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    • 2009
  • Purpose: In the literature power analysis in experimental studies is often executed and reported falsely. This descriptive study was done to promote the correct application of the Cohen(1988)'s power analysis method. Method: Articles of experimental studies from a nursing journal were selected and reviewed to examine the uses of and the reports on the power analysis process. Also, the appropriate power analysis process was discussed with an example of the most common experimental design, an independent two-group design with t test analysis plan. Result: Around half the experimental studies examined reported that they carried out power analysis. Cohen's method was the most frequently utilized but with accuracy in question. Conclusion: Power analysis to estimate sample size is the interplay between alpha, power, and effect size, and other factors in the case of t test analysis. Researchers should have a clear understanding of how to apply the Cohen's power analysis method so they do not produce poorly estimated sample sizes.

Review on Studies of Korean Medicine about Tinea Pedis (족부백선의 한의학 논문에 대한 고찰)

  • Park, Sun-Yeong;Seo, Hyung-Sik
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.29 no.3
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    • pp.42-49
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    • 2016
  • Objectives : The purpose of this study is to analyze research trends on tinea pedis in studies of Korean medicine.Methods : We searched papers using NDSL, KISS, RISS and KTKP(Korean Traditional Knowledge Portal). The first search used the keyword "Tinea pedis" in NDSL, KISS, RISS and KTKP. Used searching duration was not specified.Results : Studies found in NDSL, KISS and RISS were 122 and 118 studies were excluded. Studies found in KTKP were five papers and four studies of them were excluded. Finally five studies were selected and analyzed. Two studies of five selected ones were experimental researches and three studies were clinical researches. Among 2 researches of experimental researches, one of them was about antifungal efficacy of herbal medicines and ethahol extract of the mixture of Sophorae Subprostratae Radix, Aconiti Radix and Hibisci Syriaci Cortex and hot water extract of Phellodendri Cortex were effective. The other was about antifungal effect of the medicinal herb extraction method and vinegar extract was effective. Among 3 researches of clinical researches, there were one clinical study and two case studies. Functional soap containing herbal medicines and bee venom therapy were effective.Conclusions : As we looked for five researches, which were two experimental studies, one clinical study and two case studies. It is possible to treat tinea pedis with korean medical approach by conclusions of 5 researches. We expect that further researches will be proceeded and following results can be actively used as clinical treatments.

Recent Research Trends in Korean Medicine Treatment of Diabetes Mellitus - Focusing on Domestic Articles from 2008 to 2013 - (당뇨병의 한의학적 치료에 대한 최신 연구 동향 - 2008년부터 2013년까지 국내 학술논문을 중심으로 -)

  • Kim, Do-Hyung;Park, Seung-Chan;Lee, Ji-Hye;Lee, Hye-Yoon;Cho, Min-Kyoung;Choi, Jun-Yong;Kim, So-Yeon;Park, Seong-Ha
    • The Journal of Internal Korean Medicine
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    • v.34 no.3
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    • pp.240-255
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    • 2013
  • Objectives : This study was performed to research trends in Korean medicine treatment of diabetes mellitus (DM). Methods : We reviewed 73 studies about diabetes mellitus, which had been published from 2008 to 2013. The article search was performed on the Korean institute of oriental medicine (KIOM) database. Results : 1. Patterns of study design were as follows : 14 review studies, 44 experimental studies, 7 clinical studies, 8 case reports. 2. From the 14 review studies, we noted that literature studies about definition, pathologic mechanism, treatment, pathologic pattern identification of DM and previous study analyses were done. 3. From the 44 experimental studies that are the most common type of DM studies, various Korean medicine treatments such as single medicinal herbs, herbal complexes, diets and pharmacopuncture were used. Anti-diabetic effects were demonstrated in most of the studies. 4. 7 clinical studies about acupuncture, electroacupuncture, herbal medicine, etc. were reported. 5. 8 cases about DM complications and comorbidities were reported. Clinical symptoms improved in all of studies, blood sugar level decreased in four studies. Conclusions : Further clinical and case study based on experimental researches should be performed.

A Statistical Analysis on Nursing-Related These in Korea (우리나라 간호학 및 간호학 관련 학위논문 분석)

  • Kim, Hui-Geol;Lee, Yeong-Suk
    • The Korean Nurse
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    • v.34 no.5
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    • pp.68-81
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    • 1996
  • In order to see the development of nursing related research activities in Korea over the last three decades, abstracts of almost all of the Masters and Ph. D. theses that had appeared from 1961 up to August 1991 were collected. Number of theses amounted to 1779(76%) out of a total of 2354 theses. We analysed the papers research patterns, which are research problem, research design, population, place. Here is what we have found. 1). The types of research problems were as follows. 58.0% papers did factor-analysis, 29.1% studied factor~relations, 11.4% situation relations and 1.5% did situation~creations. With respect to the years, we found that the factor-analysis papers decreased with time but the factor~relating, the situation -relating, and the situation~creating papers were increased. Especially the situation-creating paper increased notably since the 80s'. Relating to the kind of degrees, we found that for M.S.theses 60.2% of the papers did factor-analysis, 29.0% the factor-relating studies, 10.4% the situation-relating studies, and 0.4% the situation -creating studies. For the Ph.D. theses 30.5% did the factor~relating, 30.5% the situation-relating. and 20.0% the situation-creating papers. Considering the graduate schools, we found that the regular graduate schools and the graduate school of education produced about the same number of papers of each kind, but 81.2% and 64.6% papers produced by the graduate school of public health and the graduate school of public administration, respectively, did the factor-analysis thus taking majority of the papers. 2). Research designs were as follows : 10.8% experimental studies, 89.0% non experimental studies, and 0.2% quality studies were found. So the majority of the research designs were nonexperimental. We see a meaningful difference between the M.S.theses showing 9.8% experimental studies and 90. 1% nonexperimental studies. and Ph.D. theses showing 28.4% experimental studies and 68. 4% nonexperimental studies. Relating to the graduate schools, we find that the regular graduate schools and the graduate school of education with 15.8% and 10.6% experimental studies respectively, did a little more experimental studies than other schools. but still the regular graduate schools, the graduate school of public health, and the graduate school of education each show 83.8%, 97.4%, and 89.4% nonexperimental studies, so most schools are concentrating on nonexperimental studies. 3). On the relation between research problem and research design, experimental studies show 88.0% of situation-relations and 6.8% of factor-relations. Nonexperimental studies had factor-analysis taking the majority by 64.4% and 31.9% were factor-relations. 4). On the research subjects, we have 90.8% of the papers dealing with a single subject and 9.2% of the papers dealing with two or more subjects. Most of the research subjects are patients or nurses for the regular graduate schools and the graduate school of education, but for the graduate school of administration as much as. 60% of the studies took nurses as subjects. Subjects taken were patients, nurses. and students in decreasing order for the M.S. theses and for patients, women, and nurses again in decreasing order for the Ph.D.theses. 5). On the places of study, we've had 47, 8% of the studies done in hospital rooms, 15, 1% in schools, and 9, 6% in the local community, With respect to the years, we found 36.7% in the hospital rooms, 22.4% in the schools, and 14, 8% in the local communities in the 1970's and 50.1%in the hospital rooms, 13.4% in the schools. and 9, 2% in the local communities in the 80's.

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Animal Experiments Using Rotator Cuff

  • Chung, Seok Won;Kim, Sae Hoon;Oh, Joo Han
    • Clinics in Shoulder and Elbow
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    • v.17 no.2
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    • pp.84-90
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    • 2014
  • In conducting animal studies using rotator cuff, researchers should select the appropriate types of animals and experimental models. This should also be followed by complete understanding of the selected experimental animals as well as the methods for evaluating the results. Thus, researchers could minimize errors and failure in conducting animal experimental studies. Further, this will provide a basis of establishing new idea and theory about rotator cuff diseases.

Experimental Studies on the Anti-inflammatory Effect of Cannabis sativa based on a Scientometric Analysis

  • Eunsoo Sohn;Sung Hyeok Kim;Sohee Jang;Se-Hui Jung;Kooyeon Lee;Eun-Hwa Sohn
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2021.04a
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    • pp.45-45
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    • 2021
  • This study aimed to explore research on bibliometric features of cannabis by applying scientometric analysis method, and to approach experimental research evaluation based on it. A total of 30,352 articles on cannabis published since 2001 from SCOPUS were analyzed using KnowledgeMatrix Plus and VOSviewer software. Results showed differences in research activities in countries where cannabis is legalized (Canada, the United States, the Netherlands) and Asian countries where its use is illegal. Related to medical cannabis, there has been a noticeable increase in the number of studies on pain, epilepsy, seizures and brain diseases such as multiple sclerosis. In the field of basic research, the number of pharmacological studies of cannabis on the cannabinoid type 1 receptor signaling pathway and inflammation and obesity has increased significantly. Subsequent experimental studies have compared the anti-inflammatory effects of four parts of Korean cannabis such as root, stem, leaf, and bark. Consistent with the predicted results of the scientometric analysis, all parts of C. sativa showed inhibitory effects on COX-2, NO/iNOS and TNF-α expression in LPS-stimulated RAW264.7 cells. These attempts provide an experimental research approach based on scientometric assessment.

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A study of the tendency of anti-cancer experimental study using herbal medicines (한약(韓藥)을 이용(利用)한 항암(抗癌) 실험연구(實驗硏究)의 경향(傾向)에 관(關)한 고찰(考察))

  • Kim, Hyung-A;Lim, Sung-Woo;Lee, Won-Chul
    • THE JOURNAL OF KOREAN ORIENTAL ONCOLOGY
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    • v.4 no.1
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    • pp.211-232
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    • 1998
  • Because there were lots of side effects and tolerances to the existing anticancer therapeutics, the experiment extracting the anticancer effect from medicinal herbs is in progress liviely. Therefore the purpose of this study were to research the tendency and the course of anticancer studies. To research the tendency of anticancer studies, medicinal herbs of fifty three experimental papers were analyzed and to examine the course of studies, anticancer papers in the medical world were used. The obtained results were as follows: Methods of herbal medicinal treatments were elimination the pathogenic factor(祛邪) and supporting healthy energy(扶正) method used. In this study, immediately tumor bearing and immune response were the most important point. The subject of immediately tumor bearing was not in the specific cancer but in the influence on the life span of general cencerous cells. In the experimental study of immune response, the effect on NK cell activity of medicinal herbs most studied. The combined usage of medicinal herbs and anticancer agent mostly intended to know whether it inhibits the tumor cell growth. The serum test and blood cell number test show if medicinal herbs inhibit side effect of anticancer agent. More than 80 percents of used medicinal herbs, there were anticancer activities. However anticancer experimental studies using medicinal herbs two weak points. The one, it was difficult to choose a prescription according to differentiation of symptoms and signs(辨證論) of the Oriental Medicine, because we put to the test not a man but a mouse. The other, as we observed the indirect effect of the whole physiological regulation caused by synergic effects of the complex prescription, we don't understand the detailed mechanism of the herb. Therefore, if the anticancer effect of the herb is proved the experiment, we should research the concrete medical action of medicinal herbs and immunological analysis of herbal medicines to the body.

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A Meta-Analysis on Theme and Methodology of Game Studies in the Fields of Media Studies, Youth Studies, and Psychology (국내 게임 연구의 주제와 방법에 대한 메타 분석: 언론학, 청소년학, 심리학 분야 학술 논문을 중심으로)

  • Lee, Sook-Jung
    • Journal of Korea Game Society
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    • v.21 no.6
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    • pp.125-134
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    • 2021
  • This study examined the themes and methodologies of 89 game studies published in the fields of media studies, youth studies, and psychology. Youth studies and psychology have mainly covered the theme of game addiction and negative effects. Game research in media studies have covered game use and experience, effects, addiction, regulation, game production, game space, discourse, governmental mechanism, game play as labour, etc. Game research in the fields of youth studies and psychology have mainly relied on surveys and experimental design. Game research in media studies included survey, experimental design, in-depth interviews, participatory observation, data crawling, etc.