• Journal of Korean Biological Nursing Science
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• 제25권2호
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• pp.113-122
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• 2023

Purpose: The purpose of this study was to examine the effects of a mobile application on quality of life, wellness, and preventive behaviors against dementia among older adults who use senior citizen centers. Methods: Seventy-two older adults who used senior citizen centers were allocated to an intervention group (n = 36) and a control group (n = 36). The experimental treatment involved a cognitive enhancement program for preventing dementia using a mobile application for 12 sessions over 6 weeks. Data were analyzed using the t-test, chi-square test, Fisher's exact test, paired t-test, and independent t-test. Results: The cognitive enhancement program based on a mobile application was effective for wellness (t = -3.87, p < .001) and preventive behaviors against dementia (t = -3.98, p < .001) for older adults who used a senior center. Conclusion: The mobile application-based cognitive enhancement program developed in this study is recommended as an effective intervention for dementia prevention in older adults.

• Communications for Statistical Applications and Methods
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• 제12권3호
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• pp.557-587
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• 2005

This paper elucidates the limiting Gaussian distribution of a class of rank order statistics {$T_N$} for two sample problem pertaining to empirical processes of the squared residuals from two independent samples of GARCH processes. A distinctive feature is that, unlike the residuals of ARMA processes, the asymptotics of {$T_N$} depend on those of GARCH volatility estimators. Based on the asymptotics of {$T_N$}, we empirically assess the relative asymptotic efficiency and effect of the GARCH specification for some GARCH residual distributions. In contrast with the independent, identically distributed or ARMA settings, these studies illuminate some interesting features of GARCH residuals.

• Journal of Acupuncture Research
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• 제18권3호
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• pp.48-55
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• 2001

Objective : The main cause of back pain & sciatica is HNP of L-spine. Recently, 8 Constitution Acupuncture is largely used for it, but the effects isn't announced. So we studied. The perceived pain diminishment is compared with Body acupuncture and 8 Constitution acupuncture. Methods : VAS(Visual analogue scale) was used for this research, with the pain indicator of 10 and 0 which represents a patient admission to a hospital and a status of no pain respectively. Two groups, consisting of Body acupuncture group with 17 persons and 8 Constitution acupuncture group with 12 persons, was randomly allocated for this research. SPSS(Statistical Program for Social Science) for window is used for a statistical analysis, and the independent T-test is performed to gauge the improvement of VAS, in which case, value of P below 0.05 is considered as useful. Results : The result of the VAS of comparison analysis between two groups after 10 days, shows that the improvement of subjective symptoms in Body acupuncture group is more effective than that in 8 Constitution acupuncture group. (independent T-test, P=0.009)

• 한국항공운항학회지
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• 제30권2호
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• pp.44-54
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• 2022

An empirical analysis was conducted on the workload of helicopter pilots flying in high-risk flight environments such as ground obstacles and weather effects at low altitudes. To evaluate the workload, an independent sample t-test was performed using the NASA-TLX evaluation method most suitable for the aviation field, and the workload score was calculated by applying the analytical stratification method (AHP) to compare and analyze private and commercial pilots. There is a significant difference in mean between private and commercial pilots and the result of work load was obtained over 70%. This paper studied the 'surprise and startle effect' on the helicopter field for the first time. In the future, it is intended to contribute to the safe operation of helicopters by presenting a method for effective safety management by utilizing it in the field of education and training for helicopter pilots and providing basic data for preventing accidents caused by human error.

• 한국간호교육학회지
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• 제15권1호
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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.

• Journal of Genetic Medicine
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• 제12권2호
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• pp.96-99
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• 2015

Purpose: To evaluate the performance of the Momguard noninvasive prenatal test by tracing the 'screen positive' results based on preliminary samples from Korean cohorts. Materials and Methods: This preliminary study is based on data collected by the LabGenomics Clinical Laboratory (Seongnam, Korea) with informed consent. Only pregnant women who underwent both the Momguard test and karyotyping were included in this study. Momguard test results were compared with those of the karyotyping analysis. Results: Among the 38 cases with 'screen positive' results by Momguard, 30 cases also had karyotyping results available. In three trisomy (T) 18 and three T13 cases, the Momguard results were concordant with the karyotyping results. For the T21 cases, except for one case belonging to the mid-risk zone, Momguard results from 23 out of 24 cases matched the karyotyping results. Conclusion: Momguard is a highly reliable screening tool for detecting T13, T18, and T21 cases in independent Korean cohort samples.

• 대한간호학회지
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• 제33권1호
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• pp.79-86
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• 2003

Purpose: The purpose of this study was to identify the effects of Koryo Hand-Acupuncture on health status(pain, trunk flexion, IADL, depression) of patients with chronic low back pain. Method: This study used a quasi experimental pre-test and post-test design. Data were collected from December 1st, 2000 to December 20th, 2001. 63 chronic low back pain patients(35 experimental group, 28 control group) admitted to the Back-School and consented to this study. The experimental group participated in treatment: Koryo Hand-Acupuncture and AB-Bong. Two groups was homogeneity. After 4 weeks the effects of treatment on the health status was measured between experimental and control group. Data were analyzed using SPSSWIN 10.0 with crosstab, t-test, and paired t-test. Result: In the experimental group, pain(t=4.85, p=.000) and IADL difficulty(t=2.05, p=.045) was significantly lower than those in the control group. It makes no difference trunk flexion(t=-1.60, p=.114) and depression(t=1.50, p=.138) between experimental and control group. Conclusion: These findings indicate that Koryo-Hand Acupuncture is an effective method for reducing pain and IADL difficulty in patients with chronic low back pain, and is considered as a independent nursing intervention for chronic low back pain.

• 디지털융복합연구
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• 제15권10호
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• pp.293-306
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• 2017

본 연구는 동영상을 활용하여 자아성찰을 통한 자율실습 후 기본간호 수행능력 및 수행자신감, 학업적 자기효능감, 실습만족도에 미치는 효과를 규명하기 위해 비동등성 대조군사후설계 유사실험 연구를 수행하였다. 연구대상은 G지역 일개대학 간호학과 2학년을 대상으로 하였으며, 실험군 57명, 대조군 56명이었다. 자료수집은 2017년 4월1일부터 6월 14일까지였다. 자료는 SPSS 22.0 Program을 이용하여 동질성 검정은 ${\chi}^2$ test, t-test 및 Fisher's exact test로 분석하였고, 변수에 대한 집단 간의 사전동질성 검정은 Independent-test를 시행하였다. 연구결과 기본간호 수행능력 및 수행자신감, 학업적 자기효능감(t=15.304, p<.001), 실습만족도(t=15.304, p<.001) 모두 실험군이 대조군보다 점수가 향상되었을 뿐만 아니라 통계학적으로 유의한 차이를 보였다. 결론적으로 기본간호 자율실습 시 동영상을 촬영한 후 자아성찰을 통한 실습방법은 자율실습 참여에 긍정적인 효과를 초래하였을 뿐만 아니라 학습자들의 학습동기를 높여 적극적이고 능동적인 실습참여에 기여할 수 있을 것으로 예측된다. 따라서 본 연구결과를 토대로 기본간호 술기능력을 향상시키기 위해 보다 다양한 실습에 적용해볼 것을 제안한다.

• The Journal of Asian Finance, Economics and Business
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• 제9권5호
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• pp.431-441
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• 2022

Many new challenges in different sectors have emerged due to societal growth, and researchers are needed to help solve them; and Google Scholar is a tool to assist researchers in doing so. The goal of this study is to figure out what characteristics influence how effective the Google Scholar tool is for Vietnamese university students. The study focuses on analyzing and explaining the interplay between the independent variables Perceived of Google Scholar, Perceived ease of use, Comprehensiveness and subjective norm, Perceived Satisfaction for the dependent variable Perception of usefulness. The study was carried out using quantitative and qualitative methods with 280 data points collected online through the survey link. The methods used to test the scale such as Cronbach alpha, CFA, SEM, One sample T-test, Independent Sample T-test, and One-way Anova are used to find the correlation between factors such as gender, Age, and Majors that affect the students' perception of the usefulness of google scholar. The results show that all the factors suggested in the model have a significant impact on the perceived usefulness of Google scholar. Furthermore, research shows that Google Scholar is an important academic search engine for Vietnamese students.

• 대한간호학회지
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• 제29권2호
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• pp.248-257
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• 1999

The purpose of this study was to identify basic data for the health fare of normal pregnant women. The number of subjects was 779 pregnant women who received prenatal care in two University hospitals. The data, which were collected from June to October, 1998. and used the questionnaire “Symptom Table on Fatigue Perception” designed by the Research Committee of the Industial Fatigue in Hygienic. Association of Japan Industry. The collected data were scored by use of means and standard deviations according to the subjective symptoms of fatigue and each item as an independent variable was analysed by t-test and ANOVA test. The results are as follows : 1) Degree of subjective fatigue showed as an average of 1.81. Fatigue as physical symptoms had the highest score with 2.09. followed by neuro-sensory symptoms, 1.69 and psychological symptoms had the lowest score 1.66. 2) With the respect to the general characteristics of the subjects. there were statiscally significant difference in experience of pregnancy(t＝-2.286, p＝.023). wanted pregnancy(t＝-2.935, p＝.004), parity(t＝-2.429, p＝.015), sleeping time(F＝3.478, p＝.031). and presence of other child(t＝2.347, p＝0.19).