• 정보통신설비학회논문지
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• 제9권1호
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• pp.13-18
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• 2010

As the importance of non-functional requirements has increased, many researchers have become interested in the software development process for non-functional requirements including the notation, modeling, and assessment of non-functional requirements. However, the characteristics of non-functional requirements are so sophisticated and there are many topics which have not been solved until now. In order to address one of the unsolved problems, we propose a systematic software development process to support the management of non-functional requirements. The process consists of six steps, each of which is composed of detailed activities. Using the proposed process, the non-functional requirements can be managed and modeled more effectively and systematically than previous ones.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 추계학술대회 논문집 Vol.16
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• pp.368-371
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• 2003

The humidity sensors with a stable characteristics and gas sensors operating at room temperature have been fabricated, and a multi-functional sensor system which has gas sensor, humidity sensor, temperature sensor and control circuit has been applied to the microwave oven system. For a suitable cooking state, the humidity sensors was more applicable to heating and defrosting condition than gas sensors, however, the dynamic characteristics of gas sensors were obtained in the easy burning food such as pop corn.

• ETRI Journal
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• 제40권6호
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• pp.794-801
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• 2018

This paper proposes a novel graphene-based optical microelectromechanical systems MEMS accelerometer that is dependent on the intensity modulation and optical properties of graphene. The designed sensing system includes a multilayer graphene finger, a laser diode (LD) light source, a photodiode, and integrated optical waveguides. The proposed accelerometer provides several advantages, such as negligible cross-axis sensitivity, appropriate linearity behavior in the operation range, a relatively broad measurement range, and a significantly wider bandwidth when compared with other important contributions in the literature. Furthermore, the functional characteristics of the proposed device are designed analytically, and are then confirmed using numerical methods. Based on the simulation results, the functional characteristics are as follows: a mechanical sensitivity of 1,019 nm/g, an optical sensitivity of 145.7 %/g, a resonance frequency of 15,553 Hz, a bandwidth of 7 kHz, and a measurement range of ${\pm}10g$. Owing to the obtained functional characteristics, the proposed device is suitable for several applications in which high sensitivity and wide bandwidth are required simultaneously.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2009년도 제37회 하계학술대회 초록집
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• pp.254-254
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• 2009

• 한국진공학회:학술대회논문집
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• 한국진공학회 2008년도 제34회 동계학술대회 초록집
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• pp.126-126
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• 2008

• 한국산학기술학회논문지
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• 제20권5호
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• pp.599-604
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• 2019

본 연구에서는 스마트폰 사용자의 사용습관 및 하드웨어 특성이 스마트폰의 기능 수행도에 어떻게 영향을 미치는지를 알아보았다. 특히 스마트폰 기능 요소와 사용습관과의 상관관계를 이해하는데 중점을 두었다. 기능성으로는 전부 11 종류의 기능 요소를 정의하였다. 스마트폰 특성은 하드웨어적 특성 및 사용자 사용습관 특성으로 정하였다. 스마트폰 기능별 실측치를 구하기 위해 전부 80명으로 구성된 평가단을 편성하였다. 평가단은 미리 정의된 11개의 기능 요소들에 대해 각 기능 수행에 실제로 소요되는 시간을 스톱워치를 이용하여 측정하였으며 각 기능 요소별로 5회씩 관측하고 데이터를 수집하였다. 기능 요소별 실측치를 종속변수로, 설문지를 통해 수집한 하드웨어 특성, 사용자의 사용습관 등을 전부 12개의 독립변수로 분류하여 Minitab ver.14를 이용하여 회귀분석을 실시하였다. 전반적으로 볼 때, 스마트폰 사용자의 인구통계학적 특성, 하드웨어 특성은 기능 수행에 크게 영향을 미치지 않았다. 그러나 스마트폰 사용습관과 관련한 변수들은 전체적으로 스마트폰 기능 수행도에 커다란 영향을 미쳤으며 그 결과, 과제 수행 시간이 증가하였다. 단순입력 변수 또는 시청 변수에서는 사용성에 미치는 영향은 비교적 미미했지만, 적극 활용 변수에서는 전화걸기, 전화번호 찾기, 사전 검색을 제외한 모든 과제에서 수행시간이 10% - 30%로 크게 증가하였다. 지금까지 스마트폰의 사용자 인터페이스 방식이 크고 단순한 방식으로 일률적으로 제공되었다면, 사용습관이 다양한 계층은 입력 방식이나 과제 처리 방식에 있어서 좀 더 복잡하고 다양한 형태의 인터페이스 방식이 제공되더라도 충분히 활용할 수 있다고 생각한다.

• 한국세라믹학회지
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• 제40권8호
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• pp.811-817
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• 2003

최근 들어 비금속광물의 구조적 특성을 이용한 활용분야가 매우 다양해지고 있다. 특히 판상광물은 차폐(은폐)력이 매우 우수하고, 층간특성을 이용한 흡착 및 저장특성이 매우 우수하다. 본 연구에서는 이와 같은 판상광물의 기본의 특성에 또 다른 기능성 물질을 흡착시킴으로써 부가적인 새로운 기능성을 갖는 친환경성 건축소재를 개발하고자 천연산 인상흑연 및 견운모를 기능성 모소재로 사용하고 미립화 및 ABDM(Alkyl Benzyle Demethyle Ammonium Chloride)으로 흑연입자 표면을 항균처리를 하였다. 항균처리를 위한 흡착은 전위차를 이용한 1차 흡착과 ABDM 상호간의 steric 작용에 의한 2차 흡착으로 완전 이중층이 형성되어 충분한 항균효과를 나타낼 수 있었다. 제조된 기능성 재료를 모르타르로 제조하여 다양한 기능성을 측정한 결과 세균감소율 99.7% 이상과 80% 이상의 암모니아 가스 흡착(탈취) 효과 및 95% 이상의 전자파 차폐율과 5% 정도의 열저장(축열, 잠열) 효과를 갖는 것으로 나타났다.

• 대한의용생체공학회:의공학회지
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• 제45권1호
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• pp.26-36
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• 2024

Functional brain imaging techniques have been used to diagnose psychiatric disorders such as dementia, depression, and autism. Recently, these techniques have also been actively used to study hearing loss. The present study reviewed the application of the functional brain imaging techniques in auditory research, especially those focusing on hearing loss, over the past decade. EEG, fMRI, fNIRS, MEG, and PET have been utilized in auditory research, and the number of research studies using these techniques has been increasing. In particular, fMRI and EEG were the most frequently used technique in auditory research. EEG studies mostly used event-related designs to analyze the direct relationship between stimulus and the related response, and in fMRI studies, resting-state functional connectivity and block designs were utilized to analyze alterations in brain functionality in hearing-related areas. In terms of age, while studies involving children mainly focused on congenital and pre- and post-lingual hearing loss to analyze developmental characteristics with and without hearing loss, those involving adults focused on age-related hearing loss to investigate changes in the characteristics of the brain based on the presence of hearing loss and the use of a hearing device. Overall, ranging from EEG to PET, various functional brain imaging techniques have been used in auditory research, but it is difficult to perform a comprehensive analysis due to the lack of consistency in experimental designs, analysis methods, and participant characteristics. Thus, it is necessary to develop standardized research protocols to obtain high-quality clinical and research evidence.

• 한국의류학회지
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• 제42권1호
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• pp.183-194
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• 2018

This study investigated the characteristics of Omni Channel and examined the influence of them on consumers' perceived functional value and emotional value as well as the effect of perceived functional value and emotional value on user's intention of use through Omni Channel. To verify the research model, the questionnaire survey was conducted on 20's to 40's men and women residing in Seoul and the metropolitan area by convenience sampling. The number of copies used for data analysis was 696. To verify the research model, factor analysis, reliability analysis, and structural equation model analysis were performed using AMOS 20.0. First, Omni Channel characteristics consisted of four factors: instant connectivity, location-based provability, interactivity, and entertainment. Second, the instant connectivity, location-based provability and entertainment positively influenced functional value and emotional value; however, the interactivity was significant only to the emotional value. Third, consumers' perceived value of Omni Channel characteristics had a significant effect on attitude. Fourth, the more favorable the attitude toward Omni Channel is higher for the intention to use Omni Channel.

• 산업경영시스템학회지
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• 제14권24호
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• pp.133-139
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• 1991

If the specifications of product. in general. art determined too wide. the precision of product becomes diminished. Otherwise it costs dearly to keep the precision. Therefore, It is realistic to consider various factors in determining specification of qualify characteristics TAGUCH Idefines quality of an object as "Quality is the loss that a product causes to society after being shipped. other than any losses caused by its intrinsic function". Particularly, to improve the performances of product TAGUCHI focuses his attention on the product design and process design which enable the functional characteristics of product to he robust to noises. In this paper, by the TAGUCHI's loss function, the characteristics which affect the variation of a product performance are classified into the scrappable characteristics and the reworkable characteristics when the target values of functional characteristics have been determined. And we will determine the tolerance of each characteristic which minimize the quality cost by the cost function which considers the economic factors and probability features of each characteristic.cteristic.