• Asian Pacific Journal of Cancer Prevention
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• 제15권23호
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• pp.10539-10542
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• 2015

A method to predict the risk of lung cancer is proposed, based on two feature selection algorithms: Fisher and ReliefF, and BP Neural Networks. An appropriate quantity of risk factors was chosen for lung cancer risk prediction. The process featured two steps, firstly choosing the risk factors by combining two feature selection algorithms, then providing the predictive value by neural network. Based on the method framework, an algorithm LCRP (lung cancer risk prediction) is presented, to reduce the amount of risk factors collected in practical applications. The proposed method is suitable for health monitoring and self-testing. Experiments showed it can actually provide satisfactory accuracy under low dimensions of risk factors.

• Safety and Health at Work
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• 제2권3호
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• pp.260-272
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• 2011

Objectives: The promotion of health and safety (H&S) awareness among hospital staff can be applied through various methods. The aim of this study was to assess the risk level of physical hazards in the hospital sector by combining workers' perception, experts' evaluation and objective measurements. Methods: A cross-sectional study was designed using multiple triangulation. Hospital staff (n = 447) filled in an H&S questionnaire in a general hospital in Athens and an oncology one in Thessaloniki. Experts observed and filled in a checklist on H&S in the various departments of the two hospitals. Lighting, noise and microclimate measurements were performed. Results: The staff's perception of risk was higher than that of the experts in many cases. The measured risk levels were low to medium. In cases of high-risk noise and lighting, staff and experts agreed. Staff's perception of risk was influenced by hospital's department, hospital's service, years of working experience and level of education. Therefore, these factors should be taken into account in future studies aimed at increasing the participation of hospital workers. Conclusion: This study confirmed the usefulness of staff participation in the risk assessment process, despite the tendency for staff to overestimate the risk level of physical hazards. The combination of combining staff perception, experts' evaluation and objective measures in the risk assessment process increases the efficiency of risk management in the hospital environment and the enforcement of relevant legislation.

• Clinical and Experimental Pediatrics
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• 제45권11호
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• pp.1403-1410
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• 2002

목 적: 열성 경련은 6개월에서 5세사이 소아의 2-5%가 경험하게 되는 소아과 영역에서 가장 흔한 신경계 질환으로, 열성 경련 환아 중 30-50%가 재발을 경험한다. 열성 경련의 재발을 증가시키는 위험인자들에 대한 연구들은 많이 되어 있으나, 여러 위험인자들이 재발에 관계되어 일관된 결과를 나타내지 않기 때문에 개개 위험인자에 따른 분석보다는 여러 인자들을 조합해 재발률이 높은 환자군을 가려내어 이들에게 예방적 항경련제를 투여하는 것이 효과적이라 하겠다. 따라서 저자들은 열성 경련 재발의 위험인자들을 알아 보고, 나아가 의의있는 인자들을 조합하여 재발률이 높은 군을 가려냄으로써 열성 경련의 재발을 예방하기 위한 항경련제 투여를 결정하는 데 도움이 되고자 하였다. 방 법: 1997년 3월부터 1999년 7월까지 2년 5개월동안 본원에 열성 경련으로 입원한 환자 중 최소 2년이상 외래에서 추적 관찰이 가능했던 204명을 대상으로 하여 성별, 첫 열성 경련의 발생 연령, 열성 경련과 간질의 가족력 유무, 첫 경련의 형태, 신경학적 이상 유무, 뇌파의 이상 유무 등에 따라 재발률을 조사, 비교하였다. 그리고 통계적으로 유의하였던 재발의 위험인자들을 조합하여 재발률을 조사하였다. 결 과 : 1. 위험인자별 재발률 첫 열성 경련의 발생 연령이 12개월 이전이었던 68명 중 48명(70.5%)에서 재발하여, 12개월 이후에 첫 경련이 있었던 군(66/136명, 48.5%)에 비해 재발이 유의하게 많았다(P=0.0027). 사촌이내에 열성 경련의 가족력이 있는 52명 중 39명(75.0%)이 재발하여, 가족력이 없는 군(75명/152명, 47.5%)에 비해 재발이 유의하게 많았다(P=0.0006). 성별, 간질의 가족력, 첫 열성 경련의 형태, 첫 경련전 신경계 발달 이상, 뇌파의 이상 등은 열성 경련의 재발을 증가시키지 못했다. 2. 유의한 재발인자들의 조합에 따른 재발률 열성 경련의 가족력과 첫 열성 경련의 발생 연령이 재발의 위험인자로 유의하였으므로 이들 인자들을 조합하여 재발률을 조사하였다. 1) 첫 재발률 열성 경련의 가족력이 없고 첫 경련시기가 12개월 이후였던 경우(위험인자가 없는 경우)는 43.8%에서 재발이 일어났다. 열성 경련의 가족력이 없고 첫 경련의 시기가 12개월 이전이었던 경우(위험인자가 하나)는 61.7%에서 재발이 일어났다. 열성 경련의 가족력이 있으면서 첫 경련의 발생이 12개월 이후였던 경우(위험인자가 하나)는 64.5%에서 재발이 일어났다. 열성 경련의 가족력이 있으면서 12개월 이전에 첫 경련이 있었던 경우(두가지 위험인자를 모두 가진 경우)는 90.4%에서 재발이 일어났다. 2) 두 번째 재발률 위험인자가 없는 경우는 18.1%, 하나인 경우는 44.7%, 54.9%였고, 두가지 위험인자를 모두 가진 경우는 81.0%의 높은 재발률을 보였다. 결 론 : 열성 경련의 가족력과 첫 열성 경련의 발생연령(12개월 미만)이 열성 경련 재발의 의미있는 위험인자이었고, 인자 조합시 유의한 재발인자의 수가 많아지면 재발률도 증가하였다. 열성 경련의 가족력이 있으면서 12개월 이전에 첫 열성 경련이 있었던 환아들은 재발률이 90%나 되는 고위험군에 속하였다.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.949-958
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• 2021

This study aims to develop a theoretical model in order to determine factors affecting consumer intention to use credit cards by combining Theory of perceived risk and Technology acceptance model. Despite of perspective of consequences in prior studies on related research fields, this study focuses on the sources of perceived risk, including transaction, payment and credit risks, which are proposed and measured in a preliminary research. A measurement model and a structural model with the presence of perceived risk in sources are tested in a formal research with data collected from 538 bank customers. An analysis results show that payment risk, usefulness, transaction risk, ease of use, and credit risk influence significantly Vietnamese consumers' intention to use credit cards in decreasing order of influence. These factors account for 64.6% of the variation in intended use. All three dimensions of perceived risk have a negative effect on the intention to use, with the total impact greater than the level of influence of the other two factors of usefulness and ease of use. These findings can be beneficial to banks in enacting policies to attract more consumers and to allocate resources for improving their credit card business.

• 한국전문물리치료학회지
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• 제15권2호
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• pp.44-53
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• 2008

The purpose of this preliminary study was to develop a measurement for assessing risk factors for falling in community-dwelling elderly persons. Rasch analysis and principal component analysis were performed to examine whether items on the Activities-Specific Balance Confidence (ABC), assessing self-efficacy, and items on the Berg Balance Scale (BBS), assessing balance function, contribute jointly to a unidimensional construct in the elderly. A total of 35 elderly persons (4 men, 31 women) participated. In this study, each item of ABC (16 items) and BBS (14 items) was scored on a 5-point ordinal rating scale from 0 to 4. The initial Rasch and principal component analysis indicated that 3 of the ABC items and 2 of the BBS items were misfit for this study. These 5 items were excluded from further study. After combining ABC and BBS, Rasch and principal component analyses were examined and finally 23 items selected; 12 items from ABC, 11 items from BBS. The 23 combined ABC-BBC items were arranged in order of difficulty. The hardest item was 'walk outside on icy sidewalks' and the easiest item was 'pivot transfer'. Although structural calibration of each 5 rating scale categories was not ordered, the other three essential criteria of Linacre's optimal rating scale were satisfied. Overall, the ABC-BBS showed sound item psychometric properties. Each of the 5 rating scale categories appeared to distinctly identify subjects at different ability levels. The findings of this study support that the new ABC-BBS scale measure balance function and self-efficacy. It will be a clinically useful assessment of risk factors for falling in the elderly. However, the number of subjects was too small to generalize our results. Further study is needed to develop a new assessment considering more risk factors of falling in elderly.

• Journal of Information Technology Applications and Management
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• 제17권2호
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• pp.187-205
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• 2010

This study takes a holistic approach to understand the diffusion of IPTV services by combining the adoption-diffusion model and the use-diffusion model of innovation. IPTV service, a leading digital converged application coupling media content with telecommunications, has been recently launched commercially in Korea. We created a structural model of adoption-diffusion, using the perceived easeof-use and usefulness of TAM(Technology Acceptance Model) as mediating variables, and a structural model of use-diffusion, with the rate of use and the variety of use as mediating variables. To empirically analyze these models, non-users of IPTV were surveyed using the adoption-diffusion model to identify factors influencing their intention to subscribe to the service. Meanwhile, users of IPTV were surveyed using the use-diffusion model to determine the factors that influence their satisfaction with the service and their intention to re-use it. Under the adoption-diffusion model, we found that trialability, household innovativeness and perceived risk were the determinants of user satisfaction with IPTV, and perceived ease-of-use, the mediating factors. Under the use-diffusion model, complementarity and communication were shown to be the determinants of users' satisfaction with IPTV, and variety of use, the mediating factor. We also found that consumers' intention to re-use IPTV was strongly influenced by its relative advantage and perceived risk.

• 성인간호학회지
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• 제21권2호
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• pp.257-267
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• 2009

Purpose: The purpose of this study was to identify risk factors of fall and to examine its results among patients aged 60 and over diagnosed with osteoporosis. Methods: A retrospective descriptive survey was conducted with 91 patients admitted in a university hospital in a city. Data were collected using an interview method with a structured questionnaire, and were analyzed using descriptive statistics and multiple logistic regression. Results: In patients with osteoporosis, the intrinsic risk factors of falls were aging (OR = 3.742), gait disturbance (OR = 12.565), taking one or fewer medicine (OR = 7.873), and having two or more diseases (OR = 5.173). The extrinsic risk factors included the use of a bed (OR = 3.093), slippery floors (OR = 12.130), bathroom mat without anti-slip rubber backing (OR = 3.564), and presence of a night light on the passage from the bedroom to the bathroom (OR = 2.980). Conclusion: For the elderly aged over 70 who are most vulnerable to falls, screening tests such as bone mineral density (BMD) should be conducted in health examinations and the risk of fracture caused by osteoporosis should be communicated to the vulnerable elderly. Besides, development of new exercise programs combining weightbearing exercise is needed to prevent bone loss and increase functional activities.

• 한국군사과학기술학회지
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• 제12권3호
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• pp.309-316
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• 2009

The risk management is a method to identify and to handle risk factors. In this paper, we introduce a methodology that can be used to measure of system's performance risk by combining system's TPM(technical performance measures) in the R&D(research and development) program for defense acquisition. By applying the suggested procedure, we can monitor risk trends in R&D program by calculation of system's overall TPM and find out where management should target to reduce or remove the system's performance risk.

• 한국전문물리치료학회지
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• 제28권3호
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• pp.161-167
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• 2021

Understanding sciences behind fall-related hip fractures in older adults is important to develop effective interventions for prevention. The aim of this review is to provide biomechanical understanding and prevention strategies of falls and related hip fractures in older adults, in order to guide future research directions from biomechanical perspectives. While most hip fractures are due to a fall, a few of falls are injurious causing hip fractures, and most falls are non-injurious. Fall mechanics are important in determining injurious versus non-injurious falls. Many different biomechanical factors contribute to the risk of hip fracture, and effects of each individual factors are known well. However, combining effects, and correlation and causation among the factors are poorly understood. While fall prevention interventions include exercise, vision correction, vitamin D intake and environment modification, injury prevention strategies include use of hip protectors, compliant flooring and safe landing strategies, vitamin D intake and exercise. While fall risk assessments have well been established, limited efforts have been made for injury risk assessments. Better understanding is necessary on the correlation and causation among factors affecting the risk of falls and related hip fractures in older adults. Development of the hip fracture risk assessment technique is required to establish more efficient intervention models for fall-related hip fractures in older adults.

• 대한건축학회논문집:계획계
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• 제35권6호
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• pp.3-12
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• 2019

Current risk assessment methods typically determine accident risks embedded in construction projects by combining severity and frequency; however, they do not reflect the characteristics of construction projects. To solve the problem, this study aims to develop a novel risk assessment method that combines severity, frequency, and disaster influence factors (i.e., weather conditions and worker's characteristics) for assessing risks of activities occurring on a construction site actually. In this study, a severity was estimated by death against victims, and a frequency was estimated by the victim rate. The frequency was then converted to probability taking disaster influence factors into account. Thus, instead of considering severity and frequency for assessing the original risks (RO), the proposed method uses severity and probability to yield adjusted risks (RA) for each activity. A case study was conducted to determine if the proposed method works as intended in a real setting. The results show that RA is more sensitive to disaster influence factors than RO and, therefore, is able to assess the actual risks reflecting the working environment and conditions of a construction site. This study contributes to risk management of construction projects by offering a risk assessment method that measures a possibility of potential disasters from the probabilistic perspective. This method would help project managers assess accident risks in a more systematic and quantitative manner.