• 보건교육건강증진학회지
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• 제31권2호
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• pp.65-78
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• 2014

Objectives: The aim of this study is to evaluate promotional Internet health information on health functional foods with regard to labeling information, website structure, and overall quality. Methods : The websites of 15 producers of three health functional foods (Red ginseng, vitamin, aloe) were selected. Ministry of Food and Drug Safety (MFDS) required labeling information was used to evaluate the integrity of basic information, and the structural properties of the websites were investigated. Moreover, DISCERN instrument was used to evaluate reliability and quality of information. Results : 1) Among MFDS required labeling information, seven items, including 'sell by date', and 'possible side effects' were not fully specified, and only 6.7% of Internet advertisements provided 'possible side effects'. 2) Each of 92.9% of these websites offered 'Introducation to websites and producers', and 'customer service', whereas only 64.3% and 42.9% of these websites offered 'FAQ about website utilization' and 'multilingual support', respectively. 3) The evaluation using DISCERN instrument showed the scores of $2.03{\pm}0.24$ in reliability, $1.87{\pm}0.28$ in quality, and $2.10{\pm}0.55$ in overall quality. Conclusions : Current promotional Internet health information on health functional foods has various weaknesses in terms of reliability and quality that need to be improved.

• 한국신뢰성학회지:신뢰성응용연구
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• 제14권1호
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• pp.81-91
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• 2014

The IEC 61508 standard was established to specify the functional safety of E/E/PE safety-related systems. Safety life cycle to provide the framework and direction for the application of IEC 61508 is included in this standard. In this paper, we describe overviews, objects, scopes, requirements and activities of each phase in safety life cycle. In addition, we introduce safety integrity level(SIL) which is used for verifying the safety integrity requirements of E/E/PE system and perform a case study to estimate hardware SIL by FMEDA. The SIL is evaluated by two criteria. One of them is the architectural constraints which restrict the maximum SIL by combination of SFF and HFT. The other is the probability of failure which is classified into PFD and PFH based on frequency of demand and calculated by safe or dangerous failure rates.

• 한국의류산업학회지
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• 제12권2호
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• pp.179-187
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• 2010

The purpose of this study was to investigate the actual conditions of consumers' usage of functional golfwear which is widely used in the current sportswear market. The study was carried out on 225 golfers in Busan and KyungNam area based on the demographics such as gender, age, occupation, and income. The collected data was processed with SPSS 14.0 program using frequency analysis, reliability analysis, t-test, and ANOVA. In the results of the analysis, golfers did not show high reliability and satisfaction on the functional golfwear. In the results of the most function-required golfwear items, there were shirts, pants, footwear, gloves, windbreaker, innerwear etc. in order. Most of golfers answered that the function of golfwear was required for pleasant and comfort golf activity. Therefore, it is necessary for golfwear makers to develop consumer-oriented golfwear products which are reliable and satisfiable to golf consumers.

• 한국신뢰성학회지:신뢰성응용연구
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• 제13권1호
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• pp.19-30
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• 2013

The requirements of reliability verification for new products and technology are increasing more and more in accordance with the trend change of strength for safety technology, functional skills and emotional quality. In order to conduct the purpose of robust design from the stage of product development recently, the application of reliability technology has gradually increased such as detecting the failure mode throughout the HALT technique, accelerated tests and so on. The main results are as follows; i) through the pre-test and analysis, detected the basic performance and predictable failure mode, ii) HALT technique and process has been developed that can be applied test methods for the next new products.

• 한국철도학회논문집
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• 제7권4호
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• pp.356-359
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• 2004

In this paper, as the first step to assess and enhance the reliability of Korea High Speed Train, auxiliary power system is selected and reliability analysis is carried out. The auxiliary power system is classified into subsystems and functional analysis is conducted. Reliability block diagrams are drawn and reliability parametric analysis is performed. Analysis results show that the reliability of auxiliary power system depends on critical items. To grow the system reliability, activities should be concentrated on improvement of critical items.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1541-1544
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• 2003

In this study, embodying reliability block diagram based on the web and reliability analysis technology are developed. RBD(reliability Block Diagram) represents the functional relation between elements in any product. Among relations between elements. there are serial, parallel, bridge, and stand by, etc. Advantages of developed system are integrated datum about reliability (NPRD, EPRD, MIL-HDBK 217F, NSWC. OREDA. Bellcore, and domestic institutes & companies datum). graphic user interface for convenience, and the various service analyzes the failure history data of parts.

• 한국철도학회논문집
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• 제9권5호
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• pp.606-611
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• 2006

This paper presents a procedure and an analysis method to evaluate reliability of the Korea high-speed train. The rolling stock system is divided into 6 sub-systems and each subsystem is classified into sub-assemblies. Functional analysis has been conducted to draw reliability block diagrams for the sub-systems. First, failure rates has been calculated for each sub-assembly from the failure data obtained during commissioning tests. Then a reliability block diagram is used to evaluate the MKBF(Mean Kilometers Before Failure) of the sub-systems. Activities to increase reliability have been carried out throughout the test runs and analysis results show that the reliability of the rolling stock system is gradually growing in time.

• 한국신뢰성학회:학술대회논문집
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• 한국신뢰성학회 2004년도 정기학술대회
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• pp.233-237
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• 2004

In this paper, to assess and enhance the reliability of Korea High Speed Train, electric traction system is selected and reliability analysis is carried out. The electric traction system is classified into subsystems and the functional block diagram and the reliability block diagram are drawn. Expressions to calculate the reliability are deduced and Mean Kilometer Between Service Failure is calculated using the trial test results on the track. Calculated results show reliability growth of the electric traction system.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집C
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• pp.333-338
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• 2001

Fault tree is a widely used methodology for analyzing product reliability. The fault trees are usually constructed using the experiences of expert reliability engineers in top-down approaches and have different structures according to each expert's subjectivity. In this work it is tried to find a general method for the fault tree construction based on the function tree that is the result of product function deployment. Based on the function tree, the method has the advantage of resulting an objective fault tree since the faults are defined as the opposite concept of functions. The fault tree construction of this work consists of the following steps: 1) definition of product primary function with the viewpoints of product operation and configuration, 2) construction of functional relation chart using a grouping algorithm, 3) abstraction of functional block diagram according to operation sequences and configuration of a product, 4) construction of function tree for each viewpoint, and 5) construction of fault tree by matching the function tree and simplification of the result.

• 한국신뢰성학회지:신뢰성응용연구
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• 제14권1호
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• pp.59-70
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• 2014

The requirements of reliability verification for new products and technology are increasing more and more in accordance with the trend of climate change prevention and GHG reduction technology, functional skills. SCA(Swirl Control Actuator) is the important part of a car intake manifold system. This device generates swirl that is mixing the fuel and air into the engine combustion chamber. This is to improve output for engine and reduce the emission for exhaust. In this article reliability assessment criteria for swirl control actuator for automobiles are established in terms of basic HALT and life time test.