• 대한인간공학회지
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• 제24권3호
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• pp.43-52
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• 2005

A two-dimensional posture measurement system was developed to evaluate the risks of work-related musculoskeletal disorders(MSDs) easily on various conditions of work. The posture measurement system is an essential tool to analyze the workload for preventing work-related musculoskeletal disorders. Although several posture measurement systems have been developed for workload assessment, some restrictions in industry still exist because of its difficulty on measuring work postures. In this study, an image recognition algorithm was developed based on a neural network method to measure work posture. Each joint angle of human body was automatically measured from the recognized images through the algorithm, and the measurement system makes it possible to evaluate the risks of work-related musculoskeletal disorders easily on various working conditions. The validation test on upper body postures was carried out to examine the accuracy of the measured joint angle data from the system, and the results showed good measuring performance for each joint angle. The differences between the joint angles measured directly and the angles measured by posture measurement software were not statistically significant. It is expected that the result help to properly estimate physical workload and can be used as a postural analysis system to evaluate the risk of work-related musculoskeletal disorders in industry.

• 기본간호학회지
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• 제7권3호
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• pp.479-488
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• 2000

The purpose of this study was to explore the personality and eating behavior among adult women. The subjects for the study were 237 adult women, who live in Seoul. The survey instruments were to develop for personality and eating behavior. Data were collected between November 6 and November 27 in 2000 and analyzed using the SPSS program. The result of this study are as fellows: 1. Six factors (perfection, emotion, autonomy, consideration for other, evaluate from other, dependency) emerged from personality, and these contributed 55.29% of the variance in the total score. 2. Three factors(craving, food intake according to emotion, eating habit) emerged from eating behavior, and these contributed 49.23% of the variance in the total score. 3 There were significant correlation between personality and eating behavior(r=.32, p=.00). 4. In the relationships between craving and personality, perfection, emotion, autonomy, consideration for other, evaluate from other, dependency showed a statistically significant correlation. 5. In the relationships between food intake according to emotion and personality, perfection, evaluate from other, dependency showed a statistically significant correlation. 6. In the relationships between eating habit and personality, perfection, autonomy, consideration for other, evaluate from other, dependency showed a statistically significant correlation. This study suggest that perfection, evaluation from other, dependency dimension of personality may be important factor for regulation of eating behavior.

• 한국IT서비스학회지
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• 제19권1호
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• pp.173-185
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• 2020

It is very important to evaluate training because it can systematically grasp the current status of training. Evaluation includes getting ongoing feedback from the learner, trainer and learner's supervisor, to improve the quality of the training and identify if the learner achieved the goals of the training. It also provides a justification for the implementation of training. Nonetheless, there is a lack of studies that attempt to evaluate information security training programs. In this study, we utilize the Philips model to evaluate the public training programs for the people who are in charge of the information security duties in the public sector and propose the training improvement plans. Research result has shown that it is necessary to evaluate the level of the trainees in advance and conduct training programs according to the information security skill level. In addition, it needs to conduct training according to duties such as information security management, information security operate and maintain. The limitation of this study is that each education program was not assessed individually because this study had developed an evaluation tool that could be used comprehensively.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.95-96
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• 2006

As the power industry moves towards open competition, there has been a call for methodology to evaluate distribution power system reliability by using customer interruption costs. Accordingly, it is increased for methodology to evaluate distribution power system reliability in power supply zones under competitive electricity market. This paper presents algorithm to evaluate system average interruption duration index. expected energy not supplied and system outage cost taking Into consideration failure rate of distribution facility and industrial customer interruption cost. Also, to apply this algorithm to evaluate system outage cost presented in this paper, distribution system of a dual supply system consisting of mostly high voltage customers in industrial complex in Korea is used as a sample case study. Finally, evaluation results of system interruption cost, system average interruption duration index and expected energy not supplied in sample industrial complex area are shown in detail.

• 대한간호학회지
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• 제42권7호
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• pp.1009-1018
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• 2012

Purpose: This study was done to evaluate effectiveness of home healthcare services (HHCS) specialized for elders who received spinal surgeries. Methods: A non-equivalent control group pre-post test quasi-experimental study was performed. HHCS was developed based on the Rice model of dynamic self-determination for self-care. For data collection, a control group (n=23) and an experimental group (n=23) were selected by matching age, BMI, pain, general characteristics and type of spine surgery. Measurement tools to evaluate uncertainty and knowledge were developed by the authors. The Numeric Rating Scale (NRS) and Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ) were used to evaluate pain levels. Muscular strength in the legs was measured using a digital muscle tester and tape ruler. Questionnaires were used to evaluate disability in performing ADL and psychological distress levels. Results: The experimental group showed significant decrease in uncertainty (p=.028), increased knowledge (p=.038), and partially decreased pain (p=.003-.331). Partial muscle strength increased significantly (p=.021-.644). Disability in performing ADL and psychological distress in the experimental group decreased significantly compared to control group (p=.002, p=.004). Conclusion: Results indicate HHCS is an efficient home care nursing program for these elders. Further experimental studies with larger samples are required to confirm effects of HHCS.

• 한국도로학회논문집
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• 제19권2호
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• pp.25-34
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• 2017

PURPOSES: The purpose of this paper is to evaluate interface performance while using various tack coat materials for asphalt overlay. METHODS : The evaluation was conducted with tracking test, permeability, and interface bond strength. Tracking test was conducted using an image processing technique, to investigate the susceptibility of the tack coat materials. BBS and pull-off test were conducted to evaluate bond strength. The permeability test was conducted to evaluate the effect of tack coat materials. RESULTS : Results reveal that the trackless tack coat material demonstrates less tracking compared to other materials. Moreover, both BBS and pull-off tests can effectively evaluate the bond strength at the interface. RSC-4 was measured less bond strength. Moreover, tack coat prevents water penetration through the surface and aids the extension of the surface life of asphalt pavement. CONCLUSIONS : Trackless tack coat demonstrated a high and consistent bond strength performance. The tack coat types demonstrate marginally different performance as function of curing times. Field applicability was tested based on visual observation. Therefore, these should be considered when trackless tack coat is slightly enhanced the pavement performance based on limited this study results. Finally, it is necessary to allow reasonable time for the tack coat to completely cure.

• Corrosion Science and Technology
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• 제3권6호
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• pp.227-232
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• 2004

The carboxylates as a corrosion inhibitor has been studied by many researchers because of its environmental safety and low depletion rate. However, conventional test methods of inhibitor such as weight loss measurements, linear polarization resistance and corrosion potential monitoring etc., evaluate uniform corrosion of metals. These methods are unable to evaluate crevice-related corrosions, which are encountered in most of heat exchanging facilities. In order to choose the optimum corrosion inhibitor, the appropriate test methods are required to evaluate their performances in service environment. From this point of view, polarization technique was used to evaluate the characteristics of sodium heptanoate on corrosion behavior for carbon steel. Especially a thin film crevice sensor technique were applied to simulate the crevice corrosion in this study. From these experiments, we found that oxygen as an oxidizing agent was required to obtain stable passive film on the metal. Presence of oxygen, however, accelerated crevice corrosion. Potential shift by oxygen depletion and weakened inhibitive film inside the crevice were responsible for such accelerated feature. It is shown that film for corrosion inhibition is a mixture of sodium heptanoate and iron (II) heptanoate as reaction product of iron surface and sodium heptanoate. The iron (II) heptanoate which has been synthesized by reaction of heptanoic acid and ferrous chloride in methanol solution forms bidentate complex.

• 한국통신학회논문지
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• 제27권10C호
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• pp.921-932
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• 2002

이 연구는 통신시스템 운용대안을 평가하는 방법론을 개발한다. 제안하는 방법론은 계층요소 분석 기법과 의사 결정 분석 기법을 기반으로 개발되었고, PSTN 시스템에 적용해서 방법론의 효용을 평가한다. 운용대안 계층요소 분석은 시스템 운용 요소를 파악하고 요소 중요도를 분석하는 모형이다. 요소와 대안 사이 중요도 관계를 이용하여 대안 중요도를 구한다. 또한 의사결정 기법은 시스템 운용 비용요소를 파악하고, 비강요소별 불확실성 관계를 분석한다. 여기서 비용요소는 운용비, 유지비, 연구개발비로 나누고 비용값 변화에 따라 확률분석을 한다. 두 방법론을 적용하여 중요도와 비용을 기준으로 대안이 갖는 특성을 평가한다. 끝으로 요소 변화에 따른 민감도 분석을 수행하여 최적 대안 변화를 분석한다.

• 대한산업공학회지
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• 제39권3호
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• pp.212-221
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• 2013

As the convergence among technologies is reorganizing industry sectors, it is quite important to evaluate the probability of technological convergence, and to analyze how the technologies in a certain industry sector affect the same or other industry sectors. As a result, the large number of studies have been focused on the industry convergence. However, most of them have dealt mainly with case studies or strategy and policies and few efforts have been made to study it using quantitative data. The investigation of industry convergence using quantitative data will help understand the characteristics of industry and forecast the future of the industry from an objective point of view. Therefore, this research proposes a methodology to evaluate the possibilities of industry convergence using patent data. In particular, we emphasize the possibilities of technology convergence and suggest a technology relationship matrix to evaluate the technology convergence, as an antecedent of industry convergence. The feasibility and utility of the suggested methodology was verified with a case study on the convergence of IT and BT. The research results are expected to provide a useful guideline for developing a measure of convergence.

• Steel and Composite Structures
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• 제41권6호
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• pp.887-898
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• 2021

This paper presents a simplified model to capture the nonlinear behavior of steel frames depending on the spread of plasticity method. New interaction formulae were derived to evaluate the plastic strength for I-shaped steel sections under uniaxial bending moment and axial compression load. Also, new empirical formulae were derived to evaluate the tangent stiffness modulus of steel I-shaped cross-sections considering the effect of the residual stresses suggested by the specifications in European Convention for Construction Steelworks (ECCS). The secant stiffness which depends on the tangent modulus is used to evaluate the internal forces. Based on stiffness matrix method, a finite element analysis program was developed for the nonlinear analysis of space steel frames using the derived formulae. Comparison between the proposed model results with those given by the fiber model shows very good agreement. Numerical examples were introduced to verify, check the accuracy, and evaluate the efficiency of the proposed model. The analysis results show that the new proposed model is accurate and able to minimize the solution time.