• 산업융합연구
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• 제18권3호
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• pp.19-25
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• 2020

소프트웨어 개발과정에서 소프트웨어 신뢰도 평가는 매우 중요한 문제이다. 특히, 소프트웨어 개발자에게 높은 신뢰도을 만족시키는 최적의 개발모형을 찾아내는 일은 더욱 중요한 과제이다. 이를 위해, 본 연구에서는 파레토 및 어랑 수명분포을 유한고장 NHPP 모형에 적용하여, 신뢰도 속성을 평가하였다. 이를 위하여 모수추정은 최우추정법을 적용하였고, 비선형 방정식의 풀이는 이분법을 사용하였다. 그 결과, 강도함수와 평균값함수에서 Erlang 모형이 Pareto 모형보다 우수한 성능을 보였고, 평균제곱오차도 작아서 효율적인 모형임을 확인하였다. 또한, 미래의 임무시간을 투입하고 신뢰도를 평가한 결과, Erlang 모형이 Pareto모형과 함께 효율적으로 높게 나타났으나, 반면에 Goel-Okumoto 기본모형은 감소하는 추세를 보였다. 결론적으로, Erlang 모형이 제안된 모형중 가장 우수한 성능을 가진 모형임을 알 수 있었다. 본 연구를 통하여 소프트웨어 개발자들이 최적의 소프트웨어 신뢰성 모형을 탐색하고, 평가하는데 필요한 기본지침으로 활용할 수 있을 것으로 기대한다.

• 동의생리병리학회지
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• 제31권2호
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• pp.83-93
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• 2017

This study covers pattern differentiation based on Korean medical references, research trend and modern clinical applications about Sleep-Wake disorders of Diagnostic and Statistical Manual of Mental Disorders(DSM-V) published by American Psychiatric Association. Insomnia disorder is mostly caused by yin deficiency of liver-kidney or liver qi depression and main patterns are heart-kidney non-interaction, deficiency-excess complex pattern containing phlegm-heat due to qi stagnation and blood stasis. Hypersomnolence disorder is more due to yang deficiency rather than yin deficiency and it's major pattern is spleen-kidney yang deficiency. Cataplexy is main feature in narcolepsy and corresponds to depressive psychosis or fainting in terms of Korean Medicine and narcolepsy is assumed to be relevant to liver wind. Breathing-related sleep disorders are related with phlegm-fluid retention brought on spleen deficiency with dampness encumbrance. Pattern of circadian rhythm sleep-wake disorders is combined with yin deficiency of liver-kidney or liver qi depression of insomnia disorder and spleen-kidney yang deficiency or dampness-phlegm of hypersomnolence disorder. Yin deficiency with effulgent fire brought on drugs or alcohol is one of main patterns of substance/medication-induced sleep disorder and combined patterns with yin deficiency of liver-kidney and blood stasis or dampness-phlegm-heat are mostly applied clinically. This study drew major and frequently applied patterns of sleep-wake disorders based on Koran medical literature and modern clinical applications. And that can be the groundwork for the task ahead like clinical practice guideline of sleep-wake disorders containing pattern differentiation, diagnosis and prescriptions.

• 대한인간공학회지
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• 제33권3호
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• pp.241-253
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• 2014

Objective: The objective of this study was to examine multi-modal interaction effects of input-mode switching on the use of smart phones. Background: Multi-modal is considered as an efficient alternative for input and output of information in mobile environments. However, there are various limitations in current mobile UI (User Interface) system that overlooks the transition between different modes or the usability of a combination of multi modal uses. Method: A pre-survey determined five representative tasks from smart phone tasks by their functions. The first experiment involved the use of a uni-mode for five single tasks; the second experiment involved the use of a multi-mode for three dual tasks. The dependent variables were user preference and task completion time. The independent variable in the first experiment was the type of modes (i.e., Touch, Pen, or Voice) while the variable in the second experiment was the type of tasks (i.e., internet searching, subway map, memo, gallery, and application store). Results: In the first experiment, there was no difference between the uses of pen and touch devices. However, a specific mode type was preferred depending on the functional characteristics of the tasks. In the second experiment, analysis of results showed that user preference depended on the order and combination of modes. Even with the transition of modes, users preferred the use of multi-modes including voice. Conclusion: The order of combination of modes may affect the usability of multi-modes. Therefore, when designing a multi-modal system, the fact that there are frequent transitions between various mobile contents in different modes should be properly considered. Application: It may be utilized as a user-centered design guideline for mobile multi modal UI system.

• 한국전자거래학회지
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• 제14권2호
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• pp.23-39
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• 2009

다양한 요구사항을 최신의 IT서비스로 제공하기 위해서는 끊임없는 기술 개발과 비즈니스의 이해가 필수적이지만, IT서비스 업계의 한정된 인력과 수행력으로 충족시키기에는 현실적으로 불가능하다. 따라서 IT서비스 업계에서는 다양한 산업군의 사업을 객관적인 방법으로 평가하여 사업의 우선순위 도출을 통해 집중해야 할 사업선택 전략이 필수적으로 요구된다. 본 연구는 다양하고 불확실한 사업을 객관화되고 산업별 특화된 기준으로 평가할 수 있는 프레임워크 개발을 목적으로 한다. 구조화된 평가요인은 가중치와 평가 가이드 라인을 제공함으로써 정량적, 정성적 평가를 통해 IT서비스 사업의 경쟁력지수(CI：Competitiveness Index)를 도출할 수 있도록 설계되었다. 개발된 평가요인과 프레임워크는 실무에 적용되어 이해관계자간의 갈등 조정 및 의사결정자의 종합적 판단을 지원할 수 있을 것으로 판단된다.

• Journal of mucopolysaccharidosis and rare diseases
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• 제1권1호
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• pp.2-4
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• 2015

Though the rate of incidence of each rare disease, including mucopolysaccharidosis (MPS), is low, this is not the case if they are taken as a whole. Rare diseases often have genetic causes and vary in type. However, the signs and symptoms vary greatly by disease, making it difficult to make accurate diagnoses and conduct necessary research, which is why we believe it is a field that deserves more attention and research. It is important to establish an infrastructure of experts in each country and promote cooperation within the Asia-Pacific region in order to improve specialist training and communication. Given the need for a system of cooperation, the Asia Pacific MPS Network (APMN) was established by several MPS experts in South Korea, Japan, and Taiwan in January 2013. Thereafter, the Asia Pacific MPS Registry (APMR), an electronic remote data system, was established by the APMN. Then, the Association for Research of MPS & Rare Diseases (ARMRD), an academic society that supports research on MPS and other rare diseases, was established by President Dong-Kyu Jin in April in 2015. The main task of the ARMRD is to support APMN-related work. The ARMRD published a uniform guideline that reflects the characteristics and circumstances of local patients through the Korean MPS Expert Council. Now, the APMN, APMR, and the annual Korean MPS Symposium are supported by ARMRD. Organizations like the APMN and APMR are necessary because international cooperation and collaboration are needed to conduct clinical trials on those diseases. ARMRD members hope to encourage the interest of experts and researchers of MPS & rare diseases as well as active participation in the research and treatment of patients suffering from rare diseases, including MPS, to ultimately improve the quality of life of the patients as well as their families.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.181-182
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• 2013

본 연구는 전통적인 방식과 디지털방식을 이용할 때 컬러링 프로세스에서 초보 디자이너와 전문 디자이너 간에 전략적인 측면에서 어떠한 차이가 나는지를 비교하여 그들의 행동을 깊이 있게 이해하는 것을 목적으로 한다. 본 연구는 그래픽 디자인에서 메인 프로세스에 해당하는 디자인 과정에서 서로 다른 의사소통 채널을 이용해서 탐색적인 프로토콜 연구를 실시한다. 그래서 각 디자이너들이 그들의 스킬을 활용하여 컬러링 프로세스 과제를 어떻게 수행하는 지를 관찰하고 그래픽 결과물, 구두조서를 토대로 분석을 실시한다. 본 결과물은 디자인 교육과정을 개선하는데 큰 영향을 미칠 것이며 실제 디자인 과정의 본질을 파악한다면 디자인교육과정의 개선을 위한 지침을 제공 할 것으로 기대된다.

• 대한인간공학회지
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• 제30권5호
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• pp.671-681
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• 2011

Objective: The purpose of this study is to compare the workload level at each lower limbs posture and suggest the ergonomic workstation guideline for working period by evaluating the imbalanced lower limbs postures from the physiological and psychophysical points of view. Background: Many workers like welders are working in various imbalanced lower limbs postures either due to the narrow working conditions or other environmental conditions. Method: Ten male subjects participated in this experiment. Subjects were asked to maintain 3 different lower limbs postures(standing, squatting and bending) with 3 different working conditions(balanced floor with no scaffold, imbalanced floor with 10cm height of scaffold, and imbalanced floor with 20cm height of scaffold). EMG data for the 4 muscle groups(Retus Femoris, Vastus Lateralis, Tibialis Anterior, Gastrocnemius) from each lower limbs posture were collected for 20 seconds every 2 minutes during the 8 minutes sustaining task. Subjects were also asked to report their discomfort ratings of body parts such as waist, upper legs, lower legs, and ankle. Results: The ANOVA results showed that the EMG root mean square(RMS) values and the discomfort ratings(CR-10 Rating Scale) were significantly affected by lower limbs postures and working time(p<0.05). The correlation was analyzed between the EMG data and the discomfort ratings. Also, prediction models for the discomfort rating for each posture were developed using physical condition, working time, and scaffold height. Conclusion: We strongly recommend that one should not work more than 6 minutes in a standing or squatting postures and should not work more than 4 minutes in a bending posture. Application: The results of this study could be used to design and assess working environments and methods. Furthermore, these results could be used to suggest ergonomic guidelines for the lower limbs postures such as squatting and bending in the working fields in order to prevent fatigue and pain in the lower limbs body.

• 대한인간공학회지
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• 제33권6호
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• pp.499-513
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• 2014

Objective: The objective of this study was to examine frame ratio of text information and font size in the circle smartwatch. Background: Recently, electronic manufacturers try to develop the original metaphor of traditional wrist watch (circle) in terms of smartwatch. They endeavor to break the square display in order to improve emotional customer satisfaction. Method: The experiments examined twenty level of text information design, combinations of four frame ratios (1:1, 4:3, 16:9, 21:9) and five font sizes (6pt, 7pt, 8pt, 9pt, 10pt). Nineteen participants volunteered for the experiment. Dependent variables were WPM (Words per Minute), reading preference, design preference and total preference. Furthermore, small circle display was made by using circle display data (1.3inch), which was exhibited in IFA (International Funkausstellung) 2014. Results: As a result, ANOVA (Analysis of Variance) revealed that WPM, and task time preference affect the specific frame ratio and font size. Results of ANOVA for reading preference, design preference, total preference were grouped by post-analysis LSD (Least Significant Difference). Among users, display ratio (16:9, 21:9), and font size (9pt) were preferred. In conclusion, 16:9 display ratio and 9pt are adaptable for text information in 1.3inch circle display. Conclusion: From the study, it is shown that 16:9 display ratio and 9pt size are more adaptable for text information in 1.3inch circle display than others. It is mainly due to the fact that the order of frame ratio and font size may affect the usability of reading long text information in a small circle display. Therefore, when developers design a circle display, the square frame ratio and font size are required to be considered according to circle size. Application: The 16:9 display ratio and 9pt font size may be utilized as a text information frame in the circle display design guideline for smartwatch.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제15권4호
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• pp.23-31
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• 2009

The needs of integrated play and space for both healthy children and children with Disabilities is increasing due to positive effect of integrated play. However, existing plan of play space have not considered children with Disabilities as the user and Integrated Perspective what children and children with Disabilities can do together is insufficient. For these reasons, establishing guideline of the Barrier Free Play Space and Model Development is required to meet the New Paradigm's demands. The purpose of this research is to deduce present condition and problem of play space through the Actual Condition Analysis of domestic Play Space. This study have given careful consideration to the actual condition of play space for 3 types by Types of Installation method. As a result, there are many problems from research point of view and facilities for the disablilities too. Consequently, element of plan and facilities for the disabled which are problems should be shown the direction focused improvement, moreover major task is build a barrier free play space as a place of social integration.

• 디지털융복합연구
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• 제15권4호
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• pp.443-449
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• 2017

스마트폰 사용이 대중화되어감으로써 스마트폰을 중심으로 형성되고 있는 스마트미디어환경은 새로운 생태계를 구축하고 있다. 본 연구는 스마트폰과 애플리케이션의 보급과 사용이 증가함에 따라서 오프라인에서 온라인화되어가는 요소들의 사용성을 평가하고 지속사용요소들을 알아보는 데 목적이 있다. 이를 위해 애플리케이션 사용성 비교에 관한 선행연구들을 분석하여 가설을 설정하고, 대표적인 캘린더 애플리케이션인 iCloud 캘린더와 네이버 캘린더의 사용성을 평가하기 위해 스마트폰 사용자들을 대상으로 두 캘린더 애플리케이션의 심층인터뷰를 시행하고 태스크 수행시간을 분석하여 설정한 가설을 분석하였다. 설정한 가설을 검증하며 심미성에 중점을 두는 사용자는 어떤 요소를 중요시하는지, 사용성과 실용성에 중점을 두는 사용자는 어떤 요소를 중요시하는지 형태별로 분석하였다. 향후 애플리케이션 개발의 '실패와 성공' 요소를 분석하여 향후 다른 온라인화가 되어가는 콘텐츠의 성공적인 발전을 위해 본 연구를 진행하게 되었다.