• 대한간호학회지
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• 제24권1호
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• pp.96-114
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• 1994

This study was carried out to describe and analyze experimental studies conducted in graduates nursing degree. Of 170 experimental studies conducted during the past three decades between 1962 and August 1991, 150 studies were available, including 124 master’s and 26 doctoral theses. This study examined their general characteristics and detailed research methods using percentiles. The results were as follows 1. Most of the studies adopted a quasi-experimental design. 2. The subjects of the studies were chosen by convenience sampling except for two studies whose subjects were drawn by randomization. Studies comparing experimental and control groups were in the highest proportion and the most frequent sample sizes of each group were 21 to 30 for both experimental and control groups. 3. As to measurement, physiological measures were most frequent followed by psychsociological measures and active report questionnaires. Each study, on average, adopted two kind of measurement tools. Studies in which the data collection period was of 1~2 months were in the highest pro-portion. 4. All doctoral theses and 67.0% of master’s theses examined specific research hypotheses. Of these studies, the results of 92.5% supported the hypotheses. 5. Parametric statistics were the major analytical methods. In particular, t-test was used most frequently followed by Chi square, F-test, and Pearson Correlation Coefficients. 6. Patients were the most frequent study subjects. Frequent nursing interventions were information and education followed by support, distraction, and nursing treatments. 7. With regards to the dependent variables, “feelings” such as anxiety, pain, and depression were most frequent. In addition “exchanging” such as restoring, metabolism, cardiopulmonary function, infection and vital signs were adopted as the dependent variables in 29.1％ of the studies examined, while 12.3% of the studies selected “choosing” such as stress, health behavior, or role performance.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제39권
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• pp.15.1-15.7
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• 2017

Background: This study constructed a partial-least-square path-modeling (PLS-PM) model and found the pathway by which the postsurgical vertical dimension (VD) affects the extent of the final mandibular setback on the B point at the posttreatment stage for the skeletal class III surgery-first approach (SFA). Methods: This study re-analyzed the data from the retrospective study by Lee et al. on 40 patients with skeletal class III bimaxillary SFA. Variables were obtained from cone beam computed tomography (CBCT)-generated cephalograms. Authors investigated all variables at each time point to build a PLS-PM model to verify the effect of the VD on the final setback of the mandible. Results: From PLS-PM, an increase in $VD_{10}$ was found to decrease the absolute value of the final setback amount of the mandible, which reflects the postsurgical physiological responses to both surgery and orthodontic treatment, which, in turn, can be interpreted as an increase in postoperative mandibular changes. Conclusions: To resolve the issue of collinear cephalometric data, the present study adopted PLS-PM to assess the orthodontic treatment. From PLS-PM, it was able to summarize the effect of increased postsurgery occlusal vertical dimension on the increased changeability of the B point position at the posttreatment stage.

• 말소리와 음성과학
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• 제3권1호
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• pp.97-102
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• 2011

Electroglottography (EGG) is a common method for providing non-invasive measurements of glottal activity. EGG has been used in vocal pathology as a clinical or research tool to measure vocal fold contact. This paper presents the results of pitch, jitter, and closed quotient (CQ) measurements in electroglottographic signals of young (mean = 22.7 years) and elderly (mean = 74.3 years) male and female subjects. The sustained corner vowels /i/, /a/, and /u/ were measured at around 70 dB SPL since the most notable among EGG variables is the phonation intensity, which showed positive correlation with closed phase. The aim of this paper was to measure EGG data according to age and gender. In CQ, there was a significant difference between young and elderly female subjects while there was no significant difference between young and elderly male subjects. The mean value for young males was higher than that for elderly males while the mean value for young females was lower than that for elderly females. Thus, it can be said that in mean values, increased CQ was related to decreased age for females, while CQ decreased for males as the speaker's age decreased. Although the laryngeal degeneration due to increased age seems to occur to a lesser extent in females, the significant increase of CQ in elderly female voices could not be explained in terms of age-related physiological changes. In standard deviation of pitch and jitter, the mean values for young and elderly males were higher than that for young and elderly females. That is, male subjects showed higher in mean values of voice variables than female subjects. This result could be considered as a sign of vocal instability in males. It was suggested that these results may provide powerful insights into the control and regulation of normal phonation and into the detection and characterization of pathology.

• 동의생리병리학회지
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• 제26권1호
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• pp.128-132
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• 2012

In this paper, we performed a quantitative analysis of face color according to the health status of four constitution types. 205 Korean male in age from 65 to 80 were participated in this study and 85 subjects were finally selected for the analysis. Imaging process techniques were employed to extract feature variables associated with face color from a frontal facial image. Using the extracted feature variables, the correlations between face color and health status, face color and health status in each constitution type, and face color and four constitution types in heath status group were investigated. As the result, it was observed that the face color of healthy group contained more red component and less blue component than unhealthy group. For each constitution type, the face parts showing a significant difference according to health status were different. This is the first work which reports the correlation between the face color and health status of four constitution types with a objective method, and the numerical data for the face color according to the health status of four constitution types will be an objective standard to diagnose a patient's health status.

• Toxicological Research
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• 제28권4호
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• pp.269-277
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• 2012

The purpose of this study was to understand the mechanism of cardiovascular disease (CVD) caused by exposure to hazardous chemicals. We investigated changes in the symptoms of metabolic syndrome, which is strongly related to CVD, and in levels of other CVD risk factors, with a special emphasis on the roles of catecholamines and oxidative stress. The results revealed that neither body mass index (BMI) nor waist and hip circumferences were associated with exposure to hazardous chemicals. Among metabolic syndrome criteria, only HDL-cholesterol level increased on exposure to hazardous chemicals. Levels of epinephrine (EP) and norepinephrine (NEP) were not influenced by exposure to hazardous chemicals; however, the total antioxidative capacity (TAC) reduced because of increased oxidative stress. Both hazardous chemical exposure level and metabolite excretion were related to EP, NEP, and the oxidative stress index (OSI). Logistic regression analysis with these factors as independent variables and metabolic syndrome criteria as dependent variables revealed that EP was associated with blood pressure, and NEP with metabolic syndrome in the chemical-exposed group. In conclusion, the results suggest that reactive oxygen species generated and oxidative stress due to exposure to hazardous chemicals act as mediators and cause changes in the physiological levels of EP and NEP to increase blood pressure. This ultimately leads to the development of CVD through increase in cholesterol, triglyceride, and blood glucose levels by lipid peroxidation.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.119-127
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• 2022

Most of the construction works are conducted outdoors, so the construction workers are affected by weather conditions such as temperature, humidity, and wind velocity which can be evaluated the thermal comfort as environmental factors. In our previous researches, it was found that construction accidents are usually occurred in the discomfort ranges. The safety management, therefore, should be planned in consideration of the thermal comfort and measured by a specialized simulation tool. However, it is very complex, time-consuming, and difficult to model. To address this issue, this study is aimed to develop a framework of a prediction model for improving the prediction accuracy about outdoor thermal comfort considering environmental factors using machine learning algorithms with hyperparameter tuning. This study is done in four steps: i) Establishment of database, ii) Selection of variables to develop prediction model, iii) Development of prediction model; iv) Conducting of hyperparameter tuning. The tree type algorithm is used to develop the prediction model. The results of this study are as follows. First, considering three variables related to environmental factor, the prediction accuracy was 85.74%. Second, the prediction accuracy was 86.55% when considering four environmental factors. Third, after conducting hyperparameter tuning, the prediction accuracy was increased up to 87.28%. This study has several contributions. First, using this prediction model, the thermal comfort can be calculated easily and quickly. Second, using this prediction model, the safety management can be utilized to manage the construction accident considering weather conditions.

• 한국어류학회지
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• 제23권2호
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• pp.87-94
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• 2011

본 연구는 통상적으로 활어 수송을 위해 사용되는 수온 $15{\pm}2^{\circ}C$ 범위에서 단기 수온 강하와 단기간 먹이제한을 했을 때 넙치의 스트레스 반응과 생리상태를 혈중 생화학 인자와 4종류의 갑상선호르몬의 변화를 통해 파악하고, 이 결과들을 바탕으로 어류의 스트레스 및 생리활성 지표로서 분석 인자들의 효용성을 검토하고자 하였다. 먹이제한 실험은 1년생 넙치 양성어(전장 $32.9{\pm}1.2$ cm, 체중 $348.0{\pm}34.7$ g)를 이용해 8일간 실시하였고, 수온변화 실험은 1년생 양성어(전장 $32.7{\pm}1.2$ cm, 체중 $327.1{\pm}33.6$ g)를 이용해 8일간 수온을 $15.8^{\circ}C$에서 $13.3^{\circ}C$로 하강시키며 실시하였다. 혈중 생화학적 분석 인자는 ALT, AST, TP, GLU, 전해질($Na^+$, $K^+$, $Cl^-$), thyroid hormones (total $T_3$ & $T_4$ free $T_3$ & $T_4$)의 혈중 변화로 이루어졌다. 먹이섭식 제한 결과, AST, ALT 및 전해질에서는 절식기간 동안 어떠한 유의한 변화를 찾아볼 수 없었지만, TP와 GLU는 유의하게 감소하는 경향을 보였다. 갑상선호르몬 농도의 경우, 조사된 4종류 모두 절식기간이 길어지면서 감소하는 경향이 있었으며, 통계적으로 $FT_4$와 $TT_3$가 개시에 비해 실험 종료시 유의하게 감소하였다. 수온하강 실험의 경우, AST, ALT, TP 및 전해질 및 갑상선호르몬 농도에서 유의한 변화는 없었으나, GLU에서는 온도하강에 따른 농도 감소가 관찰되었다(P<0.05).

• 한국산림과학회지
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• 제113권1호
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• pp.107-117
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• 2024

본 연구는 시간에 따른 산림환경의 물리환경요소 변화와 이에 따른 온열환경 쾌적성, 인체의 생리·심리적 반응의 차이를 종합적으로 규명하기 위하여 수행되었다. 9시부터 18시까지 산림환경의 물리환경요소(공기온도, 평균복사온도, 풍속, 상대습도)와 예상평균한서감지수(PMV), 예상불만족률(PPD)를 연속 측정하고, 1시간 간격으로 남자 대학생 30명(평균 연령: 21.7±1.9세)이 눈을 감고 5분 동안 안정을 취할 때의 생리·심리적 반응(심박변이도, 심박수, 구강체온, 혈압, 맥박수, 주관적 온열감과 쾌적감 및 인상)을 조사하였다. 더불어 물리환경요소와 생리적 반응 사이의 상관관계를 조사하였다. 그 결과, ① 공기온도, 평균복사온도, 풍속, 상대습도 모두 시간에 따라 유의하게 변화하였다. ② PMV와 PPD도 시간에 따라 유의하게 변화하였다. 주관적 온열감은 PMV와 일치하였으나, 주관적 쾌적감은 PPD와 일치하지 않았다. ③ 생리적 반응 중 ln(HF), ln(LF/HF), 심박수, 이완기혈압이 시간에 따라 유의하게 변화하였다. 공기온도가 가장 높았던 14~16시에 ln(HF)는 가장 낮았고, ln(LF/HF)는 가장 높았다. ④ 공기온도, 평균복사온도, 풍속은 ln(HF)와 음의 상관관계, ln(LF/HF)와 양의 상관관계를 나타내었다. 이를 통해 산림환경을 이용하는 시간대에 따라 이용객의 쾌적감과 생리·심리적 안정 효과가 달라질 수 있으며, 시간에 따른 산림환경의 물리환경요소 변화가 이러한 차이에 영향을 미친다는 사실이 밝혀졌다.

• 한국의류학회지
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• 제20권6호
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• pp.1027-1038
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• 1996

The decision making procedure of consumer's post purchase is important because post purchase evaluation function is the physiological variables in repurchasing. The previous studies of post-purchase decision making showed that consumer compared the expectation of pre-buying with the performance of the product of post-buying. After consumers evaluates the products, consumer is satisfactory or dissatisfactory with products. And the satisfaction effects repurchase intention. The criteria which consumer didn't consider can be important to consumer after buying. Therefore the research problems are as follows; 1. To reveal the consumer's post-purchase clothing evaluative criterita and to indentify the dimensions of post-purchase clothing evaluative criteria. 2, To examine a causal model of the repurchase intention by post- purchase clothing evaluative criteria, satisfaction and brand attitude, A questionnaire was developed and administered 530 women living in Taejeon, and social daytime wear was selected as a clothing item for the study. Consumer's post-purchase clothing evaluative criteria were composed of six dimensions; Fit, Utility, Management, Transformation, Wearing/sewing, Esthetic factor. The main causal model of repurchase intention is that post-purchase clothing evaluative criteria - satisfaction - brand altitude - repurchase intention. Finally we found that the post-purchase clothing evaluative criteria were important because the repurchase intention depended on post-purchase clothing evaluation, too.

• 동의생리병리학회지
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• 제16권5호
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• pp.1075-1078
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• 2002

Objective: The management for the stroke should ,given as soon as possible to be effect. But Patients with stroke symptoms commonly delay many hours before seeking medical attention. We evaluated the factors which are related to the time of hospital arrival after acute stroke. Method: Data were obtained from 317 patients admitted to our hospital within 72 hours of stroke onset. We assessed demographic variables, stoke subtype. referral routes. history of previous stroke, level of consciousness, distance from the place where stroke occurred to hospital, and the time interval between onset of stroke and arrival at the hospital. Results: Mean patient age was 65.99±9.57 years. The mean time interval between onset of stroke and hospital arrival was 17.26±18.69 hours and 128 (40.38%) patients arrived within 6 hours. The patients whoes stoke subtype was infarction, who arrived our hospital by way of other hospital, who had no suffered from previous stroke and who showed no impairement of consciousness was arrived at the hospital late(p<0.05). Conclusion: The majority of patients arrive at the hospital after prolonged delays for multiple reasons, and patients with milder symptoms, for whom treatment might be more effective, were less likely to arrive in time for therapy. Our study suggest that effective education about stroke to the patients and public would be highly necessary.