675 research outputs found
sj-pdf-1-jcb-10.1177_0271678X221090998 - Supplemental material for Altered resting-state cerebral blood flow and functional connectivity mediate suicidal ideation in major depressive disorder
No full textSupplemental material, sj-pdf-1-jcb-10.1177_0271678X221090998 for Altered resting-state cerebral blood flow and functional connectivity mediate suicidal ideation in major depressive disorder by Dandan Fan, Cancan He, Xinyi Liu, Feifei Zang, Yao Zhu, Haisan Zhang, Hongxing Zhang, Zhijun Zhang and Chunming Xie in Journal of Cerebral Blood Flow & Metabolism</p
Towards accurate group activity analysis in videos: robust saliency detection and effective feature modeling
No full textHuman activity analysis is an important area of computer vision research today. The goal of human activity analysis is to automatically analyze ongoing activities from an unknown video. The ability to analyze complex human activities from videos has many important applications, such as smart camera system, video surveillance, etc. However, it is still far from an off-the-shelf system. There are many challenging problems and it is still an active research area. This dissertation focuses on addressing two problems: various camera motions and effective modeling of group behaviors. We propose a unified and robust framework to detect salient motions from diverse types of videos. Given a video sequence that is recorded from either a stationary or moving camera, our algorithm is able to detect the salient motion regions. The model is inspired by two observations: 1) background motion caused by orthographic cameras lies in a low rank subspace, and 2) pixels belonging to one trajectory tend to group together. Based on these two observations, we introduce a new model using both low rank and group sparsity constraints. It is able to robustly decompose a motion trajectory matrix into foreground and background ones. Extensive experiments demonstrate very competitive performance on both synthetic data and real videos. After salient motion detection, a new method is proposed to model group behaviors in video sequences. This approach effectively models group activities based on social behavior analysis. Different from previous work that uses independent local features, our method explores the relationships between the current behavior state of a subject and its actions. An interaction energy potential function is proposed to represent the current behavior state of a subject, and velocity is used as its actions. Our method does not depend on human detection, so it is robust to detection errors. Instead, tracked salient points are able to provide a good estimation of modeling group interaction. We evaluate our algorithm in two datasets: UMN and BEHAVE. Experimental results show its promising performance against the state-of-art methods.Ph. D.Includes bibliographical referencesby Xinyi Cu
Synchronous Inflation of a Valvuloplasty Balloon Catheter With Heart Rate: In-Vitro Evaluation in Terms of Dilatation Performance
No full textBalloon aortic valvuloplasty (BAV), a minimally invasive procedure to alleviate aortic valve stenosis, commonly employs rapid ventricular pacing (RVP) for balloon stabilization. However, the repeated and extended operation time associated with this technique poses potential complications. This paper introduces a novel approach to mitigate these concerns by employing a dilatation mechanism that is synchronized with the cardiac frequency, wherein the balloon catheter is fully inflated and deflated to a safe, low volume during the decrement of the ventricular pressure. The synchronized pacing was tested at a heart rate of 60bpm. To experimentally validate the performance of this new approach, mock aortic roots reproducing different calcification patterns were used to compare the leaflets' mobility after the dilatation test with traditional BAV. Results confirm successful balloon pacing, maintaining low volume before the ventricular pressure increases. The dilatation performance assessment underscores that the proposed methodology resulted in a higher improvement in terms of the transvalvular pressure gradient and opening area. Optimal performance occurs at 60bpm, yielding a 30.28% gradient decrease and a 21.35% opening area increase. This research represents a notable step forward toward the development of BAV devices capable of autonomous stabilization, eliminating the need for RVP and its related complications. Furthermore, the use of calcified aortic root (AR) phantoms contributes to an enhanced understanding of hemodynamic implications during BAV procedures
Towards compact phase-matched and waveguided nonlinear optics in atomically layered semiconductors
No full textNonlinear frequency conversion provides essential tools for light generation,
photon entanglement, and manipulation. Transition metal dichalcogenides (TMDs)
possess huge nonlinear susceptibilities and 3R-stacked TMD crystals further
combine broken inversion symmetry and aligned layering, representing ideal
candidates to boost the nonlinear optical gain with minimal footprint. Here, we
report on the efficient frequency conversion of 3R-MoS2, revealing the
evolution of its exceptional second-order nonlinear processes along the
ordinary (in-plane) and extraordinary (out-of-plane) directions. By measuring
second harmonic generation (SHG) of 3R-MoS2 with various thickness - from
monolayer (~0.65 nm) to bulk (~1 {\mu}m) - we present the first measurement of
the in-plane SHG coherence length (~530 nm) at 1520 nm and achieve record
nonlinear optical enhancement from a van der Waals material, >10^4 stronger
than a monolayer. It is found that 3R-MoS2 slabs exhibit similar conversion
efficiencies of lithium niobate, but within propagation lengths >100-fold
shorter at telecom wavelengths. Furthermore, along the extraordinary axis, we
achieve broadly tunable SHG from 3R-MoS2 in a waveguide geometry, revealing the
coherence length in such structure for the first time. We characterize the full
refractive index spectrum and quantify both birefringence components in
anisotropic 3R-MoS2 crystals with near-field nano-imaging. Empowered with these
data we assess the intrinsic limits of the conversion efficiency and nonlinear
optical processes in 3R-MoS2 attainable in waveguide geometries. Our analysis
highlights the potential of 3R-stacked TMDs for integrated photonics, providing
critical parameters for designing highly efficient on-chip nonlinear optical
devices including periodically poled structures, resonators, compact optical
parametric oscillators and amplifiers, and optical quantum circuits
Terra Sonâmbula de Mia Couto em português e chinês : análise de neologismos
No full textPublicada em 1992, o romance de Mia Couto Terra Sonâmbula é marcado pelo uso de neologismos, formados a partir de processos não-morfológicos como a amálgama e processos morfológicos como a afixação e a composição. A criatividade miacoutiana é espelhada nas palavras novas por ele inventadas, através de processos criativos permitidos pelas regras de formação lexical do português. Vários estudos refletem sobre a tradução das obras de Mia Couto para línguas indo-europeias como o francês e o inglês, mas poucos se debruçam sobre a tradução para o chinês. A tradução chinesa dos neologismos é desafiante, uma vez que o chinês não dispõe de mecanismos equivalentes para formar novas palavras.
O presente trabalho tem como objetivo analisar a tradução chinesa de neologismos em Terra Sonâmbula, publicada em Taiwan, partindo das diferenças linguísticas entre o português e o chinês e explorando as transformações que os processos criativos sofreram durante o processo de tradução, bem como as diferenças na experiência de leitura entre os leitores de português e os de chinês. Após uma breve introdução da obra e estado de questão, propõe-se no primeiro capítulo uma análise comparativa entre o português e o chinês em termos morfológicos. No segundo capítulo, foi analisada a tradução de neologismos formados por diferentes processos morfológicos ou não-morfológicos, com ênfase em amálgamas, neologismo mais frequente na obra, mostrando que a tradução preservou, na maioria dos casos, as propriedades semânticas dos neologismos, mas perdeu os processos criativos devido às diferenças linguísticas. Assim, os leitores da tradução têm acesso às imagens criadas pelo autor, mas a forma como as imagens são representadas e coordenadas é definida pela tradutora, não conforme a descodificação e interpretação dos leitores aos neologismos, daí a diferença entre a experiência de leitura dos dois tipos de leitores (original e tradução).
No final, apresentamos nos anexos uma entrevista feita à tradutora Jin Xinyi e um corpus com os neologismos identificados na obra e a respetiva tradução.Published in 1992, Mia Couto's novel Terra Sonâmbula is marked by the use of neologisms, formed through non-morphological processes as blending and morphological processes as affixation and composition. Mia Couto's creativity is mirrored in the new words that he has invented, through creative processes allowed by the word formation rules of Portuguese. Several studies reflect on the translation of Mia Couto's works into Indo-European languages, such as French and English, but few on the translation into Chinese. The Chinese translation of neologisms is challenging due to the scarcity of equivalent mechanisms to form new words.
The present work aims to analyze the Chinese translation of neologisms in Terra Sonâmbula, published in Taiwan, starting from the linguistic differences between Portuguese and Chinese and exploring the transformations underwent by the creative processes during the translation, as well as the differences in the reading experience between Portuguese and Chinese readers. After a brief introduction to the dissertation and the Status Quaestionis, it was made a comparative analysis between Portuguese and Chinese in morphological terms. Then, it was analyzed the translation of neologisms formed by diverse morphological or non-morphological processes, with emphasis on blending words, the most frequent neologisms in Terra Sonâmbula, showing that the translation has preserved, in most cases, the semantic properties of the neologisms, but lost the creative processes due to differences between Portuguese and Chinese. Thus, the images created by the author are accessible to the readers of the translation, but the way in which the images are represented and coordinated is defined by the translator, not according to the readers' own decoding and interpretation of the new words, hence the difference on the reading experience between the readers of Portuguese and Chinese.
At the end, we present in the Annexes attached an interview to the translator Jin Xinyi and a corpus with the neologisms identified in Terra Sonâmbula, as well as the respective translation
Terra Sonâmbula de Mia Couto em português e chinês : análise de neologismos
No full textPublicada em 1992, o romance de Mia Couto Terra Sonâmbula é marcado pelo uso de neologismos, formados a partir de processos não-morfológicos como a amálgama e processos morfológicos como a afixação e a composição. A criatividade miacoutiana é espelhada nas palavras novas por ele inventadas, através de processos criativos permitidos pelas regras de formação lexical do português. Vários estudos refletem sobre a tradução das obras de Mia Couto para línguas indo-europeias como o francês e o inglês, mas poucos se debruçam sobre a tradução para o chinês. A tradução chinesa dos neologismos é desafiante, uma vez que o chinês não dispõe de mecanismos equivalentes para formar novas palavras.
O presente trabalho tem como objetivo analisar a tradução chinesa de neologismos em Terra Sonâmbula, publicada em Taiwan, partindo das diferenças linguísticas entre o português e o chinês e explorando as transformações que os processos criativos sofreram durante o processo de tradução, bem como as diferenças na experiência de leitura entre os leitores de português e os de chinês. Após uma breve introdução da obra e estado de questão, propõe-se no primeiro capítulo uma análise comparativa entre o português e o chinês em termos morfológicos. No segundo capítulo, foi analisada a tradução de neologismos formados por diferentes processos morfológicos ou não-morfológicos, com ênfase em amálgamas, neologismo mais frequente na obra, mostrando que a tradução preservou, na maioria dos casos, as propriedades semânticas dos neologismos, mas perdeu os processos criativos devido às diferenças linguísticas. Assim, os leitores da tradução têm acesso às imagens criadas pelo autor, mas a forma como as imagens são representadas e coordenadas é definida pela tradutora, não conforme a descodificação e interpretação dos leitores aos neologismos, daí a diferença entre a experiência de leitura dos dois tipos de leitores (original e tradução).
No final, apresentamos nos anexos uma entrevista feita à tradutora Jin Xinyi e um corpus com os neologismos identificados na obra e a respetiva tradução.Published in 1992, Mia Couto's novel Terra Sonâmbula is marked by the use of neologisms, formed through non-morphological processes as blending and morphological processes as affixation and composition. Mia Couto's creativity is mirrored in the new words that he has invented, through creative processes allowed by the word formation rules of Portuguese. Several studies reflect on the translation of Mia Couto's works into Indo-European languages, such as French and English, but few on the translation into Chinese. The Chinese translation of neologisms is challenging due to the scarcity of equivalent mechanisms to form new words.
The present work aims to analyze the Chinese translation of neologisms in Terra Sonâmbula, published in Taiwan, starting from the linguistic differences between Portuguese and Chinese and exploring the transformations underwent by the creative processes during the translation, as well as the differences in the reading experience between Portuguese and Chinese readers. After a brief introduction to the dissertation and the Status Quaestionis, it was made a comparative analysis between Portuguese and Chinese in morphological terms. Then, it was analyzed the translation of neologisms formed by diverse morphological or non-morphological processes, with emphasis on blending words, the most frequent neologisms in Terra Sonâmbula, showing that the translation has preserved, in most cases, the semantic properties of the neologisms, but lost the creative processes due to differences between Portuguese and Chinese. Thus, the images created by the author are accessible to the readers of the translation, but the way in which the images are represented and coordinated is defined by the translator, not according to the readers' own decoding and interpretation of the new words, hence the difference on the reading experience between the readers of Portuguese and Chinese.
At the end, we present in the Annexes attached an interview to the translator Jin Xinyi and a corpus with the neologisms identified in Terra Sonâmbula, as well as the respective translation
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Doctoral thesis recital (collaborative piano)
No full textIncludes works by Huang Yongxi, Zhao Yuanren, Deng Yao, and Piano trio No.3 in F minor, op.65 / DvorakMusicSupervisor not listed on recital program
Zhongguo Yunnan nu xing yao wu lan yong zhe de jing yan he zi wo kan fa
No full textM.Phil.Although illicit drug use, dependency and related social problems have intensified in Yunnan, the issues, particularly the experiences of women who abuse drugs have remained largely unexamined. This study was conducted to fill this knowledge gap and to have the voices of this group of women being heard.This study aims to examining the experiences and self-perception of Chinese female drug abusers in Kunming, Yunnan. The study employs qualitative method of in-depth interview to understand the life stories of 16 women at H rehabilitation centre, two of their husbands and three centre staffs，and to explore the experiences and meanings embedded in their narratives through a meticulous process of thematic analysis.Findings revealed the ‘ignorant and trendy’ theme from the informants’ narratives about their early experience with heroin. At the time of their onset for drug use, peoples were ignorant about abusing drugs and susceptible to its trendiness. Regarding their rehabilitation experiences, the ‘prison-like and inhuman’ theme emerged when sharing of their experiences in the compulsory rehabilitation institutions. When came to their experiences at the H rehabilitation centre, even though it was claimed to be a voluntary rehabilitation program, the informants’ still regarded the experience as ‘isolated and disciplined recovery’. The findings revealed the tough journey that informants had gone through in the past years.Regarding their experiences with significant others during the rehabilitation process, findings indicated a process of ‘from disconnection to reconnection’. Women drug abusers revealed that drug taking disconnecting them from family and the rehabilitation process reconnecting them to family. The close mother–daughter connection, the tense father–daughter connection and the power struggling in couple relationship were themes uncovered. To the women drug abusers, these relationships played a vital role in their drug abuse and recovery journey.Although the women drug abusers were decisive to quit drug, they would still carry the label of ‘social problem’. Despite that they disagreed to this label, the social discourses and the negative perception of others constructed the dominant theme of ‘drug addicts forever’, which became the unmoved self-perception of the informants.The findings supported the ‘self-in-relation’ theory, which highlighted the importance of connection in women’s growth and development. Findings also revealed the specific meanings of relationship for Chinese female drug abusers in the context of Chinese familism. With reference to the findings, the thesis discussed how the reform and opening-up policy, the drug policy, as well as the dominant discourses impacting on the experiences and interpretations of female drug abusers. Lastly, the study discussed the implications of findings and proposed directions for practice, policy and future research.藥物濫用和相關社會問題在雲南日益嚴重，然而對女性藥物濫用者的經驗的研究仍處於缺失狀態。因此本研究以理解中國女性藥物濫用者的經驗和自我知覺為研究主題，旨在填補知識空白，為其發聲。本研究採用質性研究方法深入訪談了居住在雲南昆明H康復中心的十六名女性，兩名配偶和三名康復中心職員。請被訪者敘說人生故事，以此瞭解她們對藥物濫用和康復經驗，和與重要他人的關係的詮釋，並擷取其對自我知覺的體會。通過對訪談資料進行主題分析，得出以下幾個重要發現。第一在敘說藥物濫用與康復的經驗中，被訪者“無知的和時尚的”的早期海洛因使用經歷是第一個主題。被訪者在強制戒毒機構有“像監獄一樣”的經驗，受到了“非人的”對待。她們對自願進入的H康復中心有複雜的感受覺得這是一種“隔離的，規訓的，康復的經驗。研究發現這群女性經歷了艱難的康復歷程。第二，在敘說與重要他人的關係中，，“從分離到重新連結”的過程成為一個顯著主題。特別地是，她們描繪了與母親的緊密關係，與父親的緊張關係，以及與伴侶對權力的爭奪這在其藥物依賴和康復的經驗中扮演了重要角色。第三，雖然被訪者決心康復，但依然背負著一個“社會問題”的標籤。儘管被訪者不認同這樣的標籤，但社會話語和他人負面的看法仍構建了一個重要主題“永遠都是吸毒者”，成為了被訪者不動搖的自我看法。研究結論呼應了“自我在關係中”理論對中國女性藥物濫用者而言，與重要他人的連結是極其重要的。其次，與父母的關係對中國女性藥物濫用者有特殊意義，這紮根於中國家族主義背景中。此外，中國的社會政策變遷，藥物依賴政策及康復模式，以及社會對藥物濫用者的主流話語共同影響了中國女性藥物濫用者的經驗和自我知覺。基於以上發現，本文在女性藥物濫用社會工作實務、政策和研究上均作出了建議。Liu, Xinyi."December 2019."Thesis M.Phil. Chinese University of Hong Kong 2020.Includes bibliographical references (leaves 186-215).Abstracts also in Chinese; some appendixes in Chinese.Title from PDF title page (viewed on 20 May, 2021)
Optical Parametric Amplification in 2D Semiconductors
No full textWe demonstrate single-pass optical parametric amplification (OPA) in monolayer semiconducting transition-metal dichalcogenides. Our experimental findings of OPA efficiency and polarization dependence are fully supported by first-principle calculations of the nonlinear response within a tight-binding model
How to improve the senior's happiness index through service design in China
No full textLAUREA MAGISTRALEOra, la Cina è diventata uno dei paesi con il tasso di invecchiamento più rapido, con l'aumento dell'aspettativa di vita, il declino del tasso di fertilità e la percentuale crescente di persone anziane nella popolazione. Mentre sempre più giovani vanno nelle grandi città Per lavorare e vivere, ci sono sempre più nidificanti vuoti in Cina e, di conseguenza, sempre più vecchi drifters nelle grandi città.
Il livello di sviluppo economico ha portato una vita materiale molto migliore per le persone. Tuttavia, il benessere di una persona non è solo benessere fisico. Ma per ora, la maggior parte degli anziani in Cina non può padroneggiare l'uso di Internet. Inoltre sono gradualmente scollegati dal mondo esterno. Per gli anziani che vivono in città di prima classe come i vecchi vagabondi, non hanno familiarità con l'ambiente circostante, inoltre non ha molti amici nativi. La loro vita è limitata alla cerchia del parco, della famiglia, della scuola dei nipoti e del mercato. Per gli anziani che vivono in città di seconda, terza classe e al di fuori è anche lo stesso. La loro vita manca anche di una varietà di attività ricreative. L'industria del tempo libero e i loro servizi sono forniti ai giovani. La maggior parte degli anziani non usa mai questi servizi, e la psicologia depressa degli anziani li rende non disposti a provare. La loro vita è ricca di beni, ma non negli aspetti spirituali o emotivi.
Nel progetto, l'autore desidera aumentare l'indice di felicità degli anziani cinesi attraverso la progettazione del servizio. In questo progetto, l'autore spera di creare un ponte tra l'industria della ricreazione e del tempo libero e gli anziani, per aiutarli a godersi la loro vita, ottenere più felicità in un modo semplice, diretto ed efficiente.Now, China has become one of the countries with the fastest aging rate, with the increase of life expectancy, the decline of the fertility rate, and the increasing proportion of senior people in the population. As more and more young people go to big cities to work and live, there are more and more empty nesters in China, and correspondingly, more and more old drifters in big cities.
The level of economic development has brought a much better material life for people. However, a person's wellness is not only physical wellness. Emotional wellness and other aspects of wellness is equally important. But for now, most of seniors in China could not master the use of the Internet. They are also gradually disconnected from the outside world. For seniors who live in first-class cities as the old drifters, they are not familiar with the surrounding environment, also does not have many native friends. Their life is confined to the circle of the park, family, grandchildren's school and market. For seniors who live in second, third class cities and outside is also the same. Their life also lacks a variety of recreation activities. While most of the Chinese market of recreation and leisure industry and their services are provided for young people. Most of seniors never use these services, and seniors' depressed psychology makes them not willing to try as well. Their life has been rich in goods, but not in the spiritual or emotional aspects.
Therefore, based on the social background and consuming market background in China, the author wants to increase the happiness index of China's seniors through the service design. In this project, the author hopes to set up a bridge between the existing recreation and leisure industry and seniors, to help them to enjoy their life, gain more happiness in a simple, direct, efficient way
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