• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.14-15
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• 2007

Proton irradiation technology was used for improvement of switching characteristics of the PT-IGBT. The proton irradiation was carried out at 5.56 MeV energy from the back side of processed wafers and at 2.39 MeV energy from the front side of the wafers. The on-state and off-state I-V characteristics and switching properties of the device were analyzed and compared with those of un-irradiated device and e-beam irradiated device which was conventional method for minority carrier lifetime reduction. The proton irradiated device by 5.56 MeV energy was superior to e-beam irradiated device for the on-state and off-state I-V characteristics, nevertheless turn-off time of proton irradiated device was superior to that of the e-beam irradiated device.

• Journal of Information Processing Systems
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• 제16권4호
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• pp.870-881
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• 2020

Because SCADA monitoring data of wind turbines are large and fast changing, the unbalanced proportion of data in various working conditions makes it difficult to process fault feature data. The existing methods mainly introduce new and non-repeating instances by interpolating adjacent minority samples. In order to overcome the shortcomings of these methods which does not consider boundary conditions in balancing data, an improved over-sampling balancing algorithm SC-SMOTE (safe circle synthetic minority oversampling technology) is proposed to optimize data sets. Then, for the balanced data sets, a fault diagnosis method based on improved k-nearest neighbors (kNN) classification for wind turbine blade icing is adopted. Compared with the SMOTE algorithm, the experimental results show that the method is effective in the diagnosis of fan blade icing fault and improves the accuracy of diagnosis.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1997년도 춘계학술발표회논문집(2)
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• pp.401-406
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• 1997

This paper presents preliminary results on the degradation of BJTs(Bipolar Junction Transistors) and MOSFETs(Metal Oxide Semiconductor Field Effect Transistors) by 1MeV electron beam. Exposure experimental results show that the change of minority-carrier life time in base region dominates the behavior of BJTs and that the buildup of charges in oxide region can affect the value of threshold voltage for MOSFETs. It was possible to correlate the decrease of the minority-carrier life time of BJTs with irradiation dose, while the shift of MOSFETs' threshold voltage was not only a function of charge buildup in oxide region.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권9호
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• pp.2961-2975
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• 2022

The Location-Based Service (LBS) is one of the most well-known services on the Internet. Positioning is the primary association with LBS services. This study proposes an intelligent LoRa-based positioning system, called AI@LBS, to provide accurate location data. The fingerprint mechanism with the clustering algorithm in unsupervised learning filters out signal noise and improves computing stability and accuracy. In this study, data noise is filtered using the DBSCAN (Density-Based Spatial Clustering of Applications with Noise) algorithm, increasing the positioning accuracy from 95.37% to 97.38%. The problem of data imbalance is addressed using the SMOTE (Synthetic Minority Over-sampling Technique) technique, increasing the positioning accuracy from 97.38% to 99.17%. A field test in the NTUST campus (www.ntust.edu.tw) revealed that AI@LBS system can reduce average distance error to 0.48m.

• 미국학
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• 제42권2호
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• pp.1-29
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• 2019

The recent census project that non-Hispanic White will be minority in thirty years has been accepted by the conservative media and politicians as the factor that threatens the authentic American national identity. The concerns about the majority-minority population chance influenced the election of Donald Trump who explicitly claimed the restriction of immigration, promising strong controls over the entry of undocumented immigrants. In the process, 'white-nationalism' based on the connection of racial whites and authentic American identity has been central issues in American society. In this sense, this paper examines who has been included/excluded from 'racial Whites' throughout the American history relating to the American identity politics and how these processes have shown the covert strategies of the whites for maintaining their privileges.

• International journal of advanced smart convergence
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• 제13권2호
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• pp.172-186
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• 2024

With the globalization of the film industry, ethnic minority films have been developed and studied by many scholars for their special ethnic representation. The film "Tharlo" directed by Pema Tseden carefully explores the identity anxiety of a Tibetan shepherd. Through the connection and separation between the protagonist and traditional culture, it shows a complexity of modern ethnic identity for minority people. This study explores what kind of cinematic techniques and symbolic elements the director uses to shape ordinary characters, build a narrative space, and show ethnic representation. This paper puts forward a theoretical framework combining cinematic quantitative methods with qualitative narrative and semiotic analysis, aiming to deepen our understanding of cinematic techniques and ethnic representation, and provides a new perspective and profound insights for discussing the complexity faced by ethnic minorities in contemporary films. This study finds that Tseden's "Tharlo" successfully portrays the complex transformation of Tibetan cultural identity in the context of globalization and modernization through cinematic techniques such as fixed camera positions, long take and black-and-white cinematography, combined with the use of symbolic elements like mirrors, lambs and identity cards.

• 한국재료학회:학술대회논문집
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• 한국재료학회 1996년도 재료학회 추계학술발표회
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• pp.107-107
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• 1996

• 한국사회복지학
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• 제63권3호
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• pp.133-156
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• 2011

본 연구는 서울 영등포구 대림동 인근에 집단적으로 거주 및 활동하고 있는 중국 동포들을 심층 면담하는 질적연구방법을 사용하였다. 이를 통해 이들의 이주초기와 현재의 지역사회에 대한 인식변화 및 현실문제를 극복하려는 대응방법을 고찰하였다. 이들이 처해 있는 현실과 갈등, 현안의 극복 노력, 동포사회 내부변화와 지향방향 등을 이해하는 것은 우리사회로의 통합에 핵심변수가 된다. 이들은 이미 방대한 거주지를 형성했고 소수자집단화 되었으며 인정투쟁을 하는 동시에 권력의 열세를 극복하고자 정치권력을 쟁취하려고 시도하고 있다. 이들에 대한 사회복지적 개입은 외국인 유입으로 초래되는 사회파편화 방지를 위해 보다 적극적인 것이어야 하고 다민족 다문화 현상에 대한 우리의 적응과 이들을 주민으로 받아들이기 위한 상호계몽적인 질서를 구축, 전파하기 위한 방안이어야 한다.

• 한국학교수학회논문집
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• 제12권4호
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• pp.389-409
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• 2009

최근 이주민 100만인 시대의 도래라는 사회변화로 인해 우리 주위에 다문화, 다언어, 저소득층에서 오는 환경적 다양성을 지닌 학생들이 급증해가는 추세이다. 본 연구는 이들 대상으로 그 동안 이뤄진 국내외 연구들을 분석하여 그 기초(framework)를 마련하는 문헌고찰이다. 이들에 대한 관심은 아직 시작단계에 불과하여 다양성의 배경을 지닌 학생을 위한 수학교육 연구로써 국내의 선행연구는 찾아보기 어려울지라도 이와 관련성 있는 소수의 국내연구와 이민자 사회로써 오랜 역사를 지닌 외국에서 이루어진 선행 연구들을 살펴보는 것은 앞으로 이들을 위한 학습자료 개발과 연구 등에 기초를 제공한다. 따라서 이들 학생들의 수학 학습현장에서 시대적 흐름은 무엇인지, 이들을 위해 그간 어떤 지원이 이루어졌는지, 그리고 이들에게 필요한 구체적인 수학교수학습의 실제는 무엇인지를 파악하여 수학 교사를 포함한 수학교육자와 학교 행정가들에게 주는 시사점을 얻고자하였다.

• 한국의상디자인학회지
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• 제22권2호
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• pp.167-180
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• 2020

The purpose of this study is to present the use of traditional culture and the direction of various fashion designs by developing and producing contemporary fashion designs on the Muslim costumes of the Chinese Hui minority. Based on research methods, the cultural background was investigated and the design characteristics were summarized. Based on the results of this survey, 4 sets of women's fashion were designed. The design intent was to feature Muslim traditional costumes and to adopt a functional contemporary design. The conclusions of this study are as follows. First, simple and indecisive clothing shows the innocent and good side of the congregation. In this study, traditional dresses were used to make use of the simple silhouette and color, and to create a contemporary atmosphere, various materials, such as wool, glossy industrial complex, lace, and fur were used to create a modern sense design by adding diversity to the simple silhouette. Second, the biggest feature of the regimented Muslim costume focuses on a head cover and suggests a contemporary sense of hood improvement, and a design that can be used with two sides. These hooded head covers can provide fashion and diversity and can be proposed as functional. Third, contemporary Muslim fashion is gaining global attention and it is possible to develop various fashion designs based on traditional motifs. This study was able to increase the feminine image by changing the solemnity of the communal dress without discarding the foundation of the traditional religious culture based on the daily dress of the people.