488 research outputs found
Fabrication and characterization of optoelectronic device using CdSe nanocrystal quantum dots/single-walled carbon nanotubes heterostructure
No full textA 3D flexible neural interface based on a microfluidic interconnection cable capable of chemical delivery
No full textAbstract The demand for multifunctional neural interfaces has grown due to the need to provide a better understanding of biological mechanisms related to neurological diseases and neural networks. Direct intracerebral drug injection using microfluidic neural interfaces is an effective way to deliver drugs to the brain, and it expands the utility of drugs by bypassing the blood–brain barrier (BBB). In addition, uses of implantable neural interfacing devices have been challenging due to inevitable acute and chronic tissue responses around the electrodes, pointing to a critical issue still to be overcome. Although neural interfaces comprised of a collection of microneedles in an array have been used for various applications, it has been challenging to integrate microfluidic channels with them due to their characteristic three-dimensional structures, which differ from two-dimensionally fabricated shank-type neural probes. Here we present a method to provide such three-dimensional needle-type arrays with chemical delivery functionality. We fabricated a microfluidic interconnection cable (µFIC) and integrated it with a flexible penetrating microelectrode array (FPMA) that has a 3-dimensional structure comprised of silicon microneedle electrodes supported by a flexible array base. We successfully demonstrated chemical delivery through the developed device by recording neural signals acutely from in vivo brains before and after KCl injection. This suggests the potential of the developed microfluidic neural interface to contribute to neuroscience research by providing simultaneous signal recording and chemical delivery capabilities
Chloride channel-4 knockout mice show delayed neuronal differentiation and neurodevelopment
No full textColloidal Single-Layer Quantum Dots with Lateral Confinement Effects on 2D Exciton
No full textControlled lateral quantum confinement in single-layer transition-metal chalcogenides (TMCs) can potentially combine the unique properties of two-dimensional (2D) exciton with the size-tunability of exciton energy, creating the single-layer quantum dots (SQDs) of 2D TMC materials. However, exploring such opportunities has been challenging due to the limited ability to produce well-defined SQDs with sufficiently high quality and size control, in conjunction with the commonly observed inconsistency in the optical properties. Here, we report an effective method to synthesize high-quality and size-controlled SQDs of WSe2 via multilayer quantum dots (MQDs) precursors, which enables grasping a clear picture of the role of lateral confinement on the optical properties of the 2D exciton. From the single-particle optical spectra and polarization anisotropy of WSe2 SQDs of varying sizes in addition to their ensemble data, we reveal how the properties of 2D exciton in single-layer TMCs evolve with increasing lateral quantum confinement. © 2016 American Chemical Society110111sciescopu
Graded synthetic approach for the fabrication of nanocrystal quantum dots for enhanced carrier injection in light-emitting diodes
No full textA synthetic approach for fabricating compositionally graded multishell nanocrystal quantum dots (NQDs) from cubic CdSe is presented. The structural shapes with each shell formation were examined using scanning transmission electron microscopy (STEM) coupled with energy dispersive x-ray spectroscopy and electron energy loss spectroscopy (EELS). The optical properties probed via time-resolved spectroscopy further revealed detailed carrier behavior at the core/graded shell interface. A highly luminescing stable optical device was built using our graded multishell NQDs
TemporalWiki: A Lifelong Benchmark for Training and Evaluating Ever-Evolving Language Models
No full textLanguage Models (LMs) become outdated as the world changes; they often fail to perform tasks requiring recent factual information which was absent or different during training, a phenomenon called temporal misalignment. This is especially a challenging problem because the research community still lacks a coherent dataset for assessing the adaptability of LMs to frequently-updated knowledge corpus such as Wikipedia. To this end, we introduce TEMPORALWIKI, a lifelong benchmark for ever-evolving LMs that utilizes the difference between consecutive snapshots of English Wikipedia and English Wikidata for training and evaluation, respectively. The benchmark hence allows researchers to periodically track an LM's ability to retain previous knowledge and acquire updated/new knowledge at each point in time. We also find that training an LM on the diff data through continual learning methods achieves similar or better perplexity than on the entire snapshot in our benchmark with 12 times less computational cost, which verifies that factual knowledge in LMs can be safely updated with minimal training data via continual learning. The dataset and the code is made available at this link
CORPO EM FLAMAS: SILÊNCIO, RUPTURA E VIOLÊNCIA DA PALAVRA EM A VEGETARIANA (채식주의자/CHAESIKJUIJA) DE HAN KANG
No full textThis article aims to explore the relationship between body, silence, rupture and violence of the word in the novel The Vegetarian (Chaesik-juija/채식주의자) (2007) by the South Korean writer Han Kang. The analysis has as starting point the discussion of the rupture and the violence of the word from interviews of the writer Han Kang and the theoretical work of Jacques Derrida. The discussion of the female body will be based on Judith Butler’s theory of gender and on criticism of Sohee Kim’s Neo-Confucian philosophy in South Korea. O presente artigo tem como objetivo explorar as relações entre corpo, silêncio, ruptura e violência da palavra no romance A Vegetariana (Chaesik-juija/ 채식주의자) (2007) da escritora sul-coreana Han Kang. A análise tem como ponto de partida a discussão da ruptura e da violência da palavra a partir de entrevistas da escritora Han Kang e da obra teórica de Jacques Derrida. Para a discussão do corpo feminino, serão utilizadas a teoria do gênero de Judith Butler e crítica à filosofia Neo-Confucionista na Coreia do Sul (de Sohee Kim).
Body in flames : silence, rupture and violence of the word in The vegetarian (채식주의자/Chaesik-juija) by Han Kang
No full textO presente artigo tem como objetivo explorar as relações entre corpo, silêncio, ruptura e violência da palavra no romance A Vegetariana (Chaesik-juija/ 채식주의자) (2007) da escritora sul-coreana Han Kang. A análise tem como ponto de partida a discussão da ruptura e da violência da palavra a partir de entrevistas da escritora Han Kang e da obra teórica de Jacques Derrida. Para a discussão do corpo feminino, serão utilizadas a teoria do gênero de Judith Butler e crítica à filosofia Neo-Confucionista na Coreia do Sul (de Sohee Kim).This article aims to explore the relationship between body, silence, rupture and violence of the word in the novel The Vegetarian (Chaesik-juija/채식주의자) (2007) by the South Korean writer Han Kang. The analysis has as starting point the discussion of the rupture and the violence of the word from interviews of the writer Han Kang and the theoretical work of Jacques Derrida. The discussion of the female body will be based on Judith Butler’s theory of gender and on criticism of Sohee Kim’s Neo-Confucian philosophy in South Korea
Partisan perspectives in news coverage of the low fertility rate issue
No full text학위논문(석사) - 한국과학기술원 : 미래전략대학원프로그램, 2025.2,[iii, 43 p. :]본 연구는 세계에서 유례없는 초저출산 시대에 돌입한 한국의 현실을 언론이 어떻게 보도했는지를 살펴봤다. 저출산 보도가 시간의 흐름에 따라 어떻게 양적으로, 또 질적으로 변화하는지를 파악할 뿐 아니라 한국 언론의 오랜 문제점으로 꼽히는 ‘정파성’이 저출산처럼 갈등 요소가 적은 사회 의제를 다룰 때에도 나타나는지를 확인하는 것이 주요 목표였다. 이를 위해 정치적 시기별로 저출산 보도량과 보도유형, 보도주제가 언론의 이념 성향에 따른 차이가 있는지를 분석했고, 언론의 이념 성향과 정권의 관계가 저출산 보도에서 드러나는지를 알아보기 위해 뉴스 프레임 분석을 수행했다. 연구 결과 저출산 보도는 시간이 갈수록 그 양이 증가했지만 보도 분야는 사회에, 보도 유형은 스트레이트에 과도하게 치우쳐 있었다. 특히 매체를 불문하고 기획·특집 보도는 급감한 반면 스트레이트 비중은 늘어났다. 또한 언론의 이념 성향에 가까운 정부가 집권했을 때에는 정부를 저출산의 책임 주체로 지목한 보도량이 줄고, 갈등 구도에선 중립적 태도를 취하는 모습을 확인할 수 있었다. 그런데 기업의 책임을 간과하고 가족주의와 국가주의적 관점에서 저출산 극복 당위성만 강조하던 보수언론은 시간이 흐르면서 기업의 책임과 사회구조적 접근의 필요성에 주목하기 시작했다. 이는 저출산 해법을 모색하는 데에 있어서 정파적 차이를 극복하고 이해관계 조정과 타협을 도출해야 할 필요성을 보여주고 있다. 또 언론이 적대적 정파성에 매몰되지 않고 사회 전체의 토론에 기여할 수 있는 보도에 힘써야 함을 시사한다.한국과학기술원 :미래전략대학원프로그램
The Impact of Information and Communications Technology (ICT): Asian Tourists in Avignon
No full textL’impact des TIC sur la communication sociale : les touristes asiatiques à Avignon La diffusion des outils numériques et les facilités d’accès aux réseaux sociaux influencent non seulement le comportement des touristes mais aussi la nature des informations qui circulent sur les réseaux sociaux. Les effets de ces tendances se manifestent également dans la perception des visites touristiques. Pendant un voyage, la communication à travers les réseaux sociaux est indispensable. Dans cet article, en analysant principalement les comportements des touristes asiatiques de Chine, de Corée du Sud et du Japon en Europe, on revisite les pratiques et le sens de la communication sur les réseaux sociaux et leur impact sur la communication dans la vie réelle.The spread of digital tools and the ease of access to social networks have an influence not only on the behavior of tourists but also on the kind of information that circulates on social networking platforms. These trends also affect the way in which sightseeing tours are perceived. During such trips, communicating on social networks has become indispensable. In this article, an analysis focusing on the behavior of Asian tourists from China, South Korea, and Japan during their visits to Europe provides a new look at the practices and meaning of communication on social networks and their impact on communication in real life
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