• 한국재난정보학회 논문집
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• 제19권1호
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• pp.216-230
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• 2023

연구목적: 아차사고의 분석을 통하여 재해를 예측하여 사고를 예방하는 목적이 있다. 연구방법: 본 연구에 서는 건설 현장의 아차사고 문헌조사 및 데이터를 수집하고, 설문조사를 실시하여 아차사고 연결 가능성 분류를 위해 로지스틱 회귀분석 및 의사결정나무 분석을 이용하였다. 연구결과: 아차사고 types이 정신적, 신체적, 안전습관 행동에 미치는 영향을 분석한 결과, 신체에 영향력이 높은 요인은 아차사고 관리의 필요성, 직종은 전기·정보통신, 건강 상태 순으로, 정신적 요인에서 공사 규모가 영향력이 높았으며, 경험 공종, 중상자 수, 직종 순으로 습관 행동 요인에 영향력이 높은 요인은 착각, 부적절한 작업지시, 신체 부위 순으로 분석되었다. 의사결정나무 분석을 통해 아차사고가 놀랄 정도의 사고로 연결가능성에 영향을 미치는 요인과 패턴을 확인하였다. 결론: 건설현장관계자는 아차사고 관찰을 고려하여 정신적. 신체적 측면의 아차사고와의 연관성에 대한 구체적 관리가 실행되어야 하며, 부적절한 작업지시가 아차사고로 연결되지 않도록 인원 배치, 작업계획, 작업절차 및 방법, 피드백을 통해 중대재해가 저감하는 작업환경을 기대한다.

• Geomechanics and Engineering
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• 제8권4호
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• pp.615-630
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• 2015

The use of helical anchors has been extensively beyond their traditional use in the electrical power industry in recent years. They are commonly used in more traditional civil engineering infrastructure applications so that the advantages of rapid installation and immediate loading capability. The majority of the research has been directed toward the tensile uplift behaviour of single anchors (only one plate) by far. However, anchors commonly have more than one plate. Moreover, no thorough numerical and experimental analyses have been performed to determine the ultimate pullout loads of multi-plate anchors. The understanding of behavior of these anchors is unsatisfactory and the existing design methods have shown to be largely inappropriate and inadequate for a framework adopted by engineers. So, a better understanding of helical anchor behavior will lead to increased confidence in design, a wider acceptance as a foundation alternative, and more economic and safer designs. The main aim of this research is to use numerical modeling techniques to better understand multi-plate helical anchor foundation behavior in soft clay soils. Experimental and numerical investigations into the uplift capacity of helical anchor in soft clay have been conducted in this study. A total of 6 laboratory tests were carried out using helical anchor plate with a diameter of 0.05 m. The results of physical and computational studies investigating the uplift response of helical anchors in soft clay show that maximum resistances depend on anchor embedment ratio and anchor spacing ratio S/D. Agreement between uplift capacities from laboratory tests and finite element modelling using PLAXIS is excellent for anchors up to embedment ratios of 6.

• Journal of Dental Anesthesia and Pain Medicine
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• 제19권6호
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• pp.369-378
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• 2019

Background: Behavior guidance is a technique used to subdue inappropriate behavior by establishing communication that meets the needs of a child. This study aimed to measure the effectiveness of a mobile app (Little Lovely Dentist) compared to the tell-show-do (TSD) technique in managing anxious children during their first dental visit. Methods: Fifty children (30 boys and 20 girls) without any past dental experience, aged from 7 to 11 years, were randomly allocated into either the dental app group or the TSD group. The pre- and post-operative anxiety of children who underwent prophylactic cleaning was assessed both physiologically and subjectively using a heart rate measurement and the RMS pictorial scale, respectively. Results: The intragroup comparison of heart rate and RMS scores for children allocated to the dental app group was statistically significant (P value ≤ 0.001). However, a significant reduction only occurred in the RMS scores, but not the heart rate measurements, in the TSD group. Conversely, there was an increase in heart rates in the TSD group. Conclusion: Educating the child prior to a dental procedure using a smartphone application such as Little Lovely Dentist can significantly alleviate the anticipatory anxiety and engage children in dental treatment during their first visit.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제24권3호
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• pp.164-169
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• 2013

Objectives : We assessed the availability of Aberrant Behavior Checklist (ABC) for the evaluation of the pharmacological effect in autistic disorder. Methods : A retrospective review of the medical records of 27 children with autistic disorder, who visited the department of child and adolescent psychiatry of Kyungpook National University Hospital, from October 2011 to February 2013, was conducted. After treatment with risperidone, changes in the severity and improvement of symptoms were measured using ABC at the baseline, 2nd visit and 3rd visit, respectively. Results : The mean daily dose of risperidone increased from $0.66{\pm}0.27mg$ (baseline, initial dose) to $1.02{\pm}0.50mg$, 2nd visit, and $1.19{\pm}0.50mg$, 3rd visit. According to ABC, irritability, lethargy, hyperactivity, and inappropriate speech subscale scores decreased significantly from the baseline to 2nd visit. Irritability and Hyperactivity subscale scores decreased significantly from the 2nd to 3rd visit. All subscales and total scores of ABC decreased significantly from the baseline to 3rd visit. Conclusion : The results of this study suggest that ABC can be used as an efficient tool to measure the symptoms of autistic disorder and to evaluate the medication effect on continuous treatment.

• Asian Pacific Journal of Cancer Prevention
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• 제17권9호
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• pp.4427-4432
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• 2016

Background: Fear and fatalism have been proposed as factors affecting breast cancer screening, but the evidence is not strong. This study aimed to determine relationships of fear and fatalism with breast cancer screening behavior among Tabriz women in Iran. Materials and Methods: In a cross- sectional study, 370 women referred to 12 health centers in Tabriz were selected with two-stage cluster sampling and data regarding breast cancer screening, fatalism and fear of breast cancer were collected respectively with a checklist for screening performance, Champions Fear and Pow Fatalism Questionnaires. Data were analyzed by logistic regression with SPSS software version 16. Results: Only 43% and 23% of participants had undergone breast self- examination and clinical breast examination. Among women older than 40 years, 38.2% had mammography history and only 2.7% of them had done it annually. Although fatalism and fear had a stimulating effects on breast cancer screening performance th relationships were not significant (P>0.05). There was a negative significant correlation between fear and fatalism (r= -0.24, p=0.000). On logistic regression analysis, age (OR=1.037, p<0.01) and income status (OR= 0.411, p<0.05) significantly explained BSE and age (OR=1.051, p<0.01) and body mass index (OR= 0.879, p<0.01) explained CBE. Also BMI (OR= 0.074, p<0.05) and income status (OR=0.155, p<0.01) was significantly effective for mammography following. Conclusions: Breast cancer screening behavior is inappropriate and affected by family livelihood status and lifestyle leads to weight gain, so that for promoting of screening behaviors, economic support to families, lifestyle modification and public education are suggested.

• 한국전산구조공학회논문집
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• 제23권3호
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• pp.267-274
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• 2010

합성구조는 전체가 동일한 재료 특성을 가지는 구조와는 달리 서로 다른 특성 즉 강재와 콘크리트의 구조로 결합되어 있다. 따라서 실제 모델링 시 이러한 재료 특성을 반영하지 않으면 실제 거동을 예측할 수 없으므로 콘크리트와 강재 사이에 인터페이스 요소를 연결하여 강재와 콘크리트의 슬립을 예측할 수 있게 한다. 인터페이스 요소는 일반적으로 사용되는 구성방정식은 적합하지 않고 실제 부착 및 슬립을 고려한 비선형 구성 방정식을 사용하여야만 적절히 사용할 수 있다. 이 계면요소를 이용하여 판형 강재 박스와 콘크리트의 접촉면을 묘사하였다. 그리고 강재 박스의 휨-좌굴 거동을 묘사하기 위해서는 일반적인 8절점 적합 요소의 사용은 부적절하므로 판형 강재 박스는 보강 변형도(Enhanced Assumed Strain) 고체요소를 사용하여 휨거동을 묘사할 수 있게 하였다.

• 성인간호학회지
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• 제13권1호
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• pp.108-122
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• 2001

The cause of essential hypertension is yet unknown, but in general is caused by interaction of hereditary factors, diet, obesity, lack of exercise and stress. The aging process influences various physiological mechanism related to regulation of blood pressure. So elderly hypertensives have a tendancy to consider the disease as a result of the physiological aging process. This attitude causes many complications, worsening of the disease and even early death because of inappropriate care. In order to improve self-management of elderly hypertensives in this study the researcher examined the effect of blood pressure regulation by an education program that improves self-care behavior, through increasing self-efficacy. The education program consisted of group education on hypertension and self-care strategies, and encouraging and reinforcing self-efficacy resources such as verbal persuation, performance accomplishment and vicarious experiences. A quasi-experimental pre-and post-test design was used. Thirty-two elderly hypertensives participated in the study. Eighteen in the education group and fourteen in the control group. The education program consisted of eight sessions twice a week for four weeks. There was no intervention for the control group. Data were analysed using SPSS for Windows(Version 8.0). The results were as follows. 1. There was a significant decrease in systolic and diastolic blood pressure between the experimental group and control group over three different times, and interaction by groups and over time. 2. There was no significant difference in the level of self-care behavior between the experimental group and control group over three different times, and interaction by groups and over time. 3. There was significant difference in selfefficacy of experimental and control group, depending on the measuring period, but there was no difference between these groups on interaction by groups and over time. 4. There was positive correlation between self efficacy and self care behavior depending on the measuring period. There was negative correlation between diastolic blood pressure and self-care behavior on the posttest of the program, and between systolic blood pressure and self-care behavior on the follow-up test of the program. Findings indicate that this study will contribute to develop nursing strategies for the regulation of blood pressure for the elderly, which is easy for the elderly to learn as a nonpharmacologic approach.

• 한국문헌정보학회지
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• 제32권4호
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• pp.209-225
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• 1998

본 연구는 이용자들이 온라인목록을 주제탐색용으로 사용할 때 어떠한 탐색행태특성을 나타내는지를 조사하고자 하였다. 101명에게 한 건의 주제탐색문제를 제시하고 그들의 탐색수행 과정을 관찰하였다. 주요 연구결과는 다음과 같다. 1) 주제탐색을 위해 사용한 주요 탐색의 접근점은 주제필드$(55.2\%)$와 서명필드$(42.2\%)$로서 그 차이는 크지 않았다. 2)주제탐색에서의 탐색실패율은 $59.3\%$로 나타났다. 3)탐색실패의 원인은 부적절한 탐색어사용$(0.5\%)$과 불리안논리자를 기용하지 않은$(42.5\%)$ 결과로 들어났다. 4) 탐색실패에 대처하는 방안으로 탐색어변경$(42.0\%)$이나 탐색 대상필드 변경$(33.8\%)$ 방법이 가장 많이 시도되었다.

• 한국수소및신에너지학회논문집
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• 제17권4호
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• pp.403-408
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• 2006

The plate reformer consisting of combustion chamber and reforming chamber for 25 kW MCFC stack has been operated and computational fluid dynamics was applied to estimate reactions and thermal fluid behavior in the reformer. The methane air 2-stage reaction was assumed in the combustion chamber, and three step steam reforming reactions were included in the calculation. Flow uniformity, reaction rate and species distribution, and temperature distribution were analyzed. In particular, temperature distribution was compared with the measurements to show good agreement in the combustion chamber, however, inappropriate agreement in the reformer chamber.

• 한국멀티미디어학회논문지
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• 제22권12호
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• pp.1457-1465
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• 2019

3D convolution is to stack multiple consecutive frames to form a cube, and then apply the 3D convolution kernel in the cube. In this structure, each feature map of the convolutional layer is connected to multiple adjacent sequential frames in the previous layer, thus capturing the motion information. However, due to the changes of pedestrian posture, motion and position, the convolution at the same place is inappropriate, and when the 3D convolution kernel is convoluted in the time domain, only time domain features of three consecutive frames can be extracted, which is not a good enough to get action information. This paper proposes an action recognition method based on feature fusion of 3D convolutional neural network. Based on the VGG16 network model, sending a pre-acquired optical flow image for learning, then get the time domain features, and then the feature of the time domain is extracted from the features extracted by the 3D convolutional neural network. Finally, the behavior classification is done by the SVM classifier.