• Journal of Power Electronics
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• 제15권5호
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• pp.1274-1285
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• 2015

This paper deals with model reference adaptive system (MRAS) speed estimators based on a secondary flux for linear induction motors (LIMs). The operation of these estimators significantly depends on an adaptation mechanism. Fixed-gain PI controller is the most common adaptation mechanism that may fail to estimate the speed correctly in different conditions, such as variation in machine parameters and noisy environment. Two adaptation mechanisms are proposed to improve LIM drive system performance, particularly at very low speed. The first adaptation mechanism is based on fuzzy theory, and the second is obtained from an LIM mechanical model. Compared with a conventional PI controller, the proposed adaptation mechanisms have low sensitivity to both variations of machine parameters and noise. The optimum parameters of adaptation mechanisms are tuned using an offline method through chaotic optimization algorithm (COA) because no design criterion is given to provide these values. The efficiency of MRAS speed estimator is validated by both numerical simulation and real-time hardware-in-the-loop (HIL) implementations. Results indicate that the proposed adaptation mechanisms improve performance of MRAS speed estimator.

• 대한음성학회지:말소리
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• 제68권
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• pp.33-47
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• 2008

In this paper, we propose a hybrid acoustic and pronunciation model adaptation method based on context dependency for Korean-English speech recognition. The proposed method is performed as follows. First, in order to derive pronunciation variant rules, an n-best phoneme sequence is obtained by phone recognition. Second, we decompose each rule into a context independent (CI) or a context dependent (CD) one. To this end, it is assumed that a different phoneme structure between Korean and English makes CI pronunciation variabilities while coarticulation effects are related to CD pronunciation variabilities. Finally, we perform an acoustic model adaptation and a pronunciation model adaptation for CI and CD pronunciation variabilities, respectively. It is shown from the Korean-English speech recognition experiments that the average word error rate (WER) is decreased by 36.0% when compared to the baseline that does not include any adaptation. In addition, the proposed method has a lower average WER than either the acoustic model adaptation or the pronunciation model adaptation.

• 여성건강간호학회지
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• 제16권1호
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• pp.1-9
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• 2010

Purpose: The study addressed the adaption of middle- aged Korean women to menopause, including the use of Yangsaeng, a traditional health care regimen that incorporates specific principles and methods to promote health and prevent illness, with the aim of improving health and longevity of life. Methods: Middle-aged women (40~59 years, n=171) residing in Seoul and Gyeong-Gi Province. Data was collected by using a self-reported questionnaire. Menopausal period adaptation was measured by 29 items in four categories (physical, self-concept, role function, and inter-dependent). Yangsaeng was measured by 31 questionnaire items in eight categories (morality, mind, diet, activity and rest, exercise, sleep, seasonal, and sexuality). Results: Significant differences in menopausal adaptation were evident on the basis of participant education and income. There were significant differences in Yangsaeng in terms of participant education, nature of employment, and income. Menopausal adaptation positively correlated to use of Yangsaeng. Physical adaptation, self-concept adaptation, role function adaptation, and inter-dependent adaptation positively correlated to morality Yangsaeng, mind Yangsaeng, and activity and rest Yangsaeng. Conclusion: Middle-aged Korean women who practice Yangsaeng may be better positioned to adapt to menopause. Yangsaeng may be an advantageous nursing intervention in this population.

• 한국음향학회지
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• 제23권8호
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• pp.590-596
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• 2004

본 논문에서는 한국어 연결 숫자음 인식을 위한 최대 사후 eigenvoice을 사용한 자기적응 기법을 제안한다. 제안된 최대 사후 eigenvoice 기법은 eigenvoice 계수에 대한 확률 밀도 함수를 가정함으로 구성된다. 제안된 알고리즘은 기존 eigenvoice 추정 과정에 선 분포 모델을 포함하는 일반적인 해를 제공하는 구조를 갖는다. 인식할 한 문장만을 사용하는 자기 적응 시스템을 위해 매우 강인한 특성을 갖는 최대 사후 eigenvoice 적응 기법을 사용하였다. 한국어 연결 숫자음에 대한 일련의 자기 적응 실험결과 제안된 알고리즘의 성능은 매우 적은 량의 적응 데이터에 대해 기존 eigenvoice 알고리즘에 비해 우수한 성능을 나타냈었다.

• 한국환경복원기술학회지
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• 제14권6호
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• pp.111-117
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• 2011

This study attempts to facilitate climate change adaptation in conservation area by spatial planning of climate adaptation zone for endangered species. Spatial area is South Korea and select leopard cat (Prionailurus bengalensis) as a target species of this study. In order to specify the climate adaptation zone, firstly, Maximum entropy method (Maxent) was used to identify suitable habitat, and then core habitat was selected for leopard cat. Secondly, land use resistance index was evaluated and least cost distance was analyzed for target species. In this step we choose dispersal capacity of leopard cat to reflect species ecological characteristic. Finally, climate adaptation zone is described and adaptation measures are suggested. The presented approach could be generalized for application into conservation planning and restoration process. Furthermore, spatial planning of climate adaptation zone could increase heterogeneity of habitat and improve adaptive capacity of species and habitat itself.

• 무역상무연구
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• 제64권
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• pp.239-264
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• 2014

Two types of responses to climate change exist. First is climate mitigation which includes efforts of reducing CO2 and GHG emissions. Second response is climate adaptation process which is establishing climate resilience in the supply chain. The two are inherently different since mitigation strategy focus on eliminating the source of climate change and is long term in nature but adaptation strategy is moderating the impact of potential or current climate change. In order to embed climate resilience in the supply chain, mitigation strategies and adaption strategies must be implemented simultaneously. Corporation's adaptation to climate change related natural disaster can be seen as a response that includes mitigation and adaptation strategies simultaneously. A comprehensive climate change resilience supply chain approach has to be developed. This paper illustrated guidelines and adaptation process framework businesses can utilize in order to build climate resilience. Screening process before the actual assessment of risk was introduced as well as the whole adaptation process of establishing information system and strengthening climate-related operational flexibility.

• 여성건강간호학회지
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• 제19권4호
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• pp.242-253
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• 2013

Purpose: The purpose of this study was to develop a scale to assess immigrant women's needs for pregnancy and postpartum adaptation and to test the reliability and validity of the scale. Methods: To construct scale items, critical issues and difficulties associated with pregnancy and postpartum adaptation of immigrant women were identified and categorized through a literature review. Fifty-two scale items were constructed, and data for validity and reliability testing was collected with a questionnaire survey from 367 immigrant women. Data were analyzed with descriptive statistics, factor analysis, and reliability coefficients. Results: The final measurement scale to assess immigrant women's pregnancy and postpartum adaptation consisted of 48 items and 7 factors (adaptation to daily activity during pregnancy, cross-cultural understanding and personal respect, understanding of the process of pregnancy and delivery, baby rearing and family support, physical and emotional adaptation after childbirth, nutrition during pregnancy, and sexual life adaptation). The seven factors accounted for 64.26% of the variance, and Cronbach's ${\alpha}$ was .96. Conclusion: The scale developed by this study is a reliable and valid instrument and can be used to assess needs of pregnancy and postpartum adaptation and can be utilized in providing nursing interventions for immigrant women.

• 산업융합연구
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• 제22권3호
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• pp.1-12
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• 2024

본 연구의 목적은 재취업 산재근로자의 직장 적응을 유형화하고, 직장 적응에 영향을 미치는 결정요인들을 탐색하는 것이다. 재취업 산재근로자의 직장 적응 집단을 유형화하기 위해, 산재근로자 522명을 대상으로 잠재프로파일분석을 실시하였다. 분석결과, 직장 적응 집단을 환경 우세 적응형(집단 1), 일 중심 적응형(집단 2), 환경 순응 적응형(집단 3)의 세 유형으로 분류되었다. 또한, 산재 후 이들의 직장 적응에 영향요인을 분석하기 위해 혼합회귀분석을 실시한 결과, 환경 우세 적응형에 비해 일 중심 적응형과 환경 순응 적응형의 직장 적응이 낮은 것으로 나타났다. 또한 학력과 자아존중감이 산재 근로자의 직장 적응에 중요한 영향을 미치는 요인이라는 것을 확인하였다. 본 연구 결과를 토대로, 재취업 산재근로자의 직장 적응을 높이기 위하여 재취업 이전 단계에서의 개인에 대한 맞춤형 지원과 재취업 이후 고용환경 두 가지 측면에서 제도를 보완할 필요가 있음을 제언하였다. 구체적으로 재활프로그램의 개발과 확산, 원직 복귀 사업주에게 한정적으로 지급되었던 지원금의 대상범위 확대 고려 등이 있다. 본 연구를 통하여 재취업 산재근로자에 대해 보다 표적화된 정책 방안을 마련할 수 있을 것으로 기대한다.

• 정보처리학회논문지D
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• 제9D권5호
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• pp.903-914
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• 2002

본 연구에서는 컴포넌트의 개조에 필요한 기법과 이를 지원하는 도구를 개발하였다. 컴포넌트를 재사용 하거나 조림하는 과정 중에 컴포넌트의 개조가 필요하게 되는데, 이는 컴포넌트의 인터페이스가 조립하고자 하는 다른 컴포넌트와 다른 경우가 많기 때문이다. 가끔은 새로운 요구 사항에 의해 추가적인 속성의 정의가 필요한 경우도 생기게 된다. 그러므로 컴포넌트의 재사용과 조립에는 컴포넌트 개조의 과정이 필수적이다. 본 연구에서는 컴포넌트 개조를 지원하기 위해서 바이너리 컴포넌트 개조 기법과 개조 컴포넌트에 의한 개조 기법을 제안하였다. 또한 효과적 개조 과정 지원을 위해 개조 지원 도구를 개발하였다. 이로써 소스코드가 없는 기존의 컴포넌트를 개조하여 새로운 요구 사항에 부합되지 못하거나 기존의 다른 컴포넌트와 조립에 문제가 있는 컴포넌트를 쉽게 개조할 수 있도록 지원하였다.

• 한국음향학회지
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• 제22권3호
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• pp.188-193
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• 2003

이전의 여러 가지 화자 적응을 위한 모델 적응 방법은 훈련 환경과 테스트 환경의 불일치를 보상하기 위한 방법으로 적응데이터의 테스트 환경에서의 분포를 고려하지 않은 보상 방법이었다. 적은 적응 데이터에 대해서 보상을 극대화하기 위한 파라미터 변환 방법들은 고르지 못한 적응 데이터에 의해 시스템의 성능이 저하 될 가능성이 있다 즉, 데이터가 적을 경우에는 적응 데이터의 분포가 적응 결과에 중대한 영향을 미치게 된다. 적은 데이터에 대해서도 높은 인식률 향상을 가져오기 위한 supervised 훈련과정을 구조적 사후확률 최대화(SMAP: Structural Maximum a Posterior) 알고리듬에 적용하였다. 제안된 가중치 SMAP (Weighted SMAP) 알고리듬과 SMAP알고리듬을 TIDIGITS 코퍼스를 사용해서 비교해 보았다. 제안된 WSMAP은 적은 양의 데이터에 대해서 SMAP보다 좋은 성능을 나타내었다. 환경 적응에 적응 데이터의 분포를 고려하는 이와 같은 방법은 다른 적응 알고리듬에도 적용될 수 있다.