• 정보관리학회지
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• 제40권3호
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• pp.245-271
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• 2023

본 연구는 전자책 이용률이 높은 디지털 네이티브 세대인 20대를 대상으로 전자책 구독서비스에 대한 인식을 파악하고자 하였다. 설문조사와 사용성 평가(usability testing)를 병행한 혼합연구 방법을 통해 전자책 이용률이 높은 20대 대학생의 전자책 구독 서비스이용 실태 및 서비스에 대한 인식을 조사하였다. 설문조사를 통해 국내 대학생 202명의 의견을 수집하였고, 전자책 비이용자와 이용자를 구분하여 분석하였다. 설문 결과, 비이용자와 이용자 간의 전자책에 인식의 차이가 나타났으며, 휴대성 및 편의성은 두 연구 참여자 그룹에게 공통적으로 나타나는 전자책의 장점으로 조사되었다. 사용성 평가에서 사용된 '밀리의 서재' 애플리케이션은 가장 대중적인 전자책 플랫폼으로 해당 서비스를 활용하여 전자책 이용 경험이 없는 20대 대학생 10명을 대상으로 평가가 진행되었다. 실험 결과, 연구 참여자들은 전자책의 편의성, 디자인, 다양한 부가 기능, 가성비 등에 대해 긍정적인 반응을 보인 반면, 흥미 부족, 기능 실용성, 터치 오류 및 오작동, 장서 부족, 시스템 문제에 대해서는 부정적인 의견을 나타냈다.

• 한국식품위생안전성학회지
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• 제16권4호
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• pp.333-341
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• 2001

각 국가 권역별 이행실험방법에 따라 고온가열 식품 포장재와 용기의 simulants별 이행량을 측정하여 비교하였다. 고온가열 식품에 대한 총이행량을 비교해 본 결과 비지방성 simulant로 증류수와 10% ethanol수용액을 사용한 경우 일반적으로 121$^{\circ}C$의 2시간 조건에서의 CPA와 PA 6,6 필름을 제외하고는 2.5 mg/dm$^2$ 보다 낮았다. 지방성 simulant 에서 soybean oil로의 총이행량은 다른 simulan에 비해 높게 나타나는 경향을 보였다. 실험된 필름들 중 PVC wrap에서의 총이행량은 23.9~54.6 mg/dm$^2$로서 다른 필름들에 비해 높은 값을 나타내었다. 비지방성보다는 지방성 식품의 simulant에서 그리고 온도가 높은 조건하에서 이행량이 증가되는 경향을 보였다. 유사한 실험 온도와 시간 조건하에서는 PA계의 극성 필름은 극성 simulants에서, 그리고 PO계와 같은 비극성 필름은 비극성 simulants에서 이행량이 증가되는 경향을 보였다. 일부 필름에서 국가 권역별 이행실험 방법 및 조건의 상이함으로 인한 이행량의 차이가 확인되었다는 것은 주목할 만할 사실이다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1994년도 봄 학술발표회 논문집
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• pp.221-226
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• 1994

A safety evaluation of cable tunnel, which is a concrete box structure with telecommunication facilities in it, exposed to fire is given. The immediate field observation was performed to find out any sign of sudden structural failure. In some region, where the fire intensity was heavy, the spalling of concrete cover in upper slab occurred. Next, more careful investigation was done with proper non-desturctive testing methods and structural analysis taking into account the changes in material properties due to fire. It seems that there is no severe damage on concrete, reinforcements and over all structural system.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1991년도 봄 학술발표회 논문집
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• pp.117-120
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• 1991

Cracks of concrete structure must be analyzed and estimated synthetically in order to have a maintenance and to insure the safety and the durability of structure. Concrete cracks have to be surveyed with respect to depth, width, shape and direction etc, but crack depth among these items is not measured easily. Occasionally, it needs to measure the crack depth of concrete structure for the purpose of evaulating the safe capacity and the necessity of repair. Therefore, this research is performed to verify the applicability and the accuracy of Ultra-sonic Pulse Velocity Technique(Tester), in non-destructive testing methods of concrete crack depth.

• 한국IT서비스학회지
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• 제6권2호
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• pp.161-175
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• 2007

Face recognition technology has lately attracted considerable attention because of its non-intrusiveness, usability and applicability. Related companies insist that their commercial products show the recognition rates more than 95% according to their self-testing. But, the rates cannot be admitted as official recognition rates. So, performance evaluation methods and tools are necessary to objectively measure the accuracy and performance of face recognition systems. In this paper, I propose a reference model for biometrics recognition evaluation tools, and implement an evaluation tool for the face recognition system based on the proposed reference model.

• Communications for Statistical Applications and Methods
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• 제14권3호
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• pp.497-506
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• 2007

Coverage-based NHPP SRGMs have been introduced in order to incorporate the coverage growth behavior into the NHPP SRGMs. The coverage growth function representing the coverage growth behavior during testing is thus an essential factor of the coverage-based NHPP SRGMs. This paper proposes a class of discrete time coverage growth functions and illustrates its application to real data sets.

• 비파괴검사학회지
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• 제23권6호
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• pp.616-621
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• 2003

There are various Non-Destructive Evaluation (NDE) techniques used for measurement of residual stresses in material, such as magnetic methods, X-ray diffraction, Ultrasonic velocity measurement etc. The capabilities, applications and limitations of these techniques for evaluation of cold work/plastic deformation were studied and compared. Mild steel plates were subjected to different degree of cold deformation and were analyzed by Magneto-mechanical Acoustic Emission (MAE), Barkhausen Noise (BN) and magnetic properties (hysteresis loop parameters analysis). Further, these specimens were analyzed by X-ray diffraction and ultrasonic velocity measurements. The microhardness measurement and microstructure studies of these cold worked plates were also carried out. The results of all these studies and comparison of different techniques are discussed in this paper.

• 대한인간공학회지
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• 제18권3호
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• pp.87-103
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• 1999

The present study employed an experimental usability testing technique to explore cognitive engineering characteristics of WWW. Based on the results of our previous study which employed non-experimental methods such as questionnaire and heuristic evaluation method, this study used a behavioral performance-measurement technique to evaluate the usability of a domestic web-site design. Specifically, we revised the menu and document structure of the original 'Movie-Friend' site to solve the design problems which were extracted from the results of the heuristic evaluation method of our previous study. Exp. 1 compared the relative navigation efficiency of the original frame menu site and the revised pop-up toolbar site, and Exp. 2 compared the toolbar menu site and the revised frame site. As a result of Exp. 1, the revised pop-up toolbar site showed improved navigation efficiency compared to the original site, as indicated by the mean latency and the number of pathways to reach the target page. However, we found no performance difference between the frame site and toolbar site in Exp. 2.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 춘계학술대회 논문집
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• pp.230-237
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• 2001

For the structural integrity of large and complex structures such as railway vehicle, the in-field diagnosis of mechanical properties of the structures is needed, and especially, the mechanical characteristics of the weldment must be carefully evaluated. But, conventional standard testing methods having destructive procedures are not applicable to in-field assessment of mechanical property variations within weldment because they needs the limitations of specimen size and geometry. In this paper, to overcome this problems, the advanced indentation technique (AIS) is introduced for simple and non-destructive/in-field testing of weldment of industrial structures. This test measures indentation load-depth curve during indentation and analyzes the mechanical properties related to deformation and fracture. First of all, flow properties such as yield strength, tensile strength and work hardening index can be evaluated through the analysis of the deformation behavior beneath the spherical indenter. Additionally, case studies of advanced indentation techniques are introduced.

• 한국의료질향상학회지
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• 제30권1호
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• pp.105-119
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• 2024

Purpose: This study aimed to develop a survey instrument to assess the Patient Safety Culture in Korean hospitals and evaluate its validity and reliability. Methods: A preliminary instrument was developed through a literature review, focus group interviews, content validity testing, and pretesting for face validity. A total of 467 hospital employees participated in the psychometric testing. Validity and reliability assessments included content validity, construct validity, criterion-related validity, and internal consistency. Results: The Korean Patient Safety Culture Survey Instrument comprised 35 items across seven factors: leadership, patient safety policy and procedure, patient safety improvement system, teamwork, non-punitive environment, patient safety knowledge and attitudes, and patient safety priority. These seven factors contributed 60.98% of the variance of the total scale. Cronbach's alpha for internal consistency was .93; the seven factors ranged from .66 to .91. Conclusion: The results of this study showed that the Korean Patient Safety Culture Survey Instrument is reliable, valid, and suitable for measuring patient safety culture in Korean hospitals.