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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
281

Growing in faith together an intergenerational formation program, St. Teresa Avila Community, Valparaiso, IN /

Clark, Colleen B., January 1900 (has links)
Thesis (M.A.P.S.)--Catholic Theological Union at Chicago, 2006. / Vita. Includes bibliographical references (leaves 50-51).
282

Subsystem architecture sizing and analysis for aircraft conceptual design

Chakraborty, Imon 07 January 2016 (has links)
In traditional aircraft conceptual design, subsystems are largely accounted for implicitly based on available historical data and trends. Such an approach has limitations when novel subsystem architectures such as More Electric or All Electric aircraft are considered, since historical data regarding such architectures is either limited or non-existent. In such cases, the incorporation of more thorough and explicit consideration of the aircraft subsystems into the conceptual design phase is warranted. The first objective of this dissertation is to integrate subsystem sizing and analysis methods that are suitable for the early design phases with the traditional aircraft sizing methodology. The goal is to facilitate the assessment subsystem architecture performance with respect to vehicle and mission level metrics. The second objective is to investigate how the performance of different subsystem architectures varies with aircraft size. The third and final objective is to assess the sensitivity of architecture performance to epistemic and technological uncertainty. These objectives are pursued through the development of an integrated sizing and analysis environment where the subsystems are sized in parallel with the aircraft itself using subsystem models that are computationally inexpensive and do not require detailed aircraft definition. The effects of subsystem mass, secondary power requirements, and drag increments are propagated to the mission performance analysis following which the vehicle and subsystems are re-sized. A number of experiments are performed to first test the capabilities of the developed environment and subsequently assess the performance of numerous subsystem architectures and the sensitivity of select architectures to epistemic and technological uncertainty.
283

Tale of two loops : simplifying all-plus Yang-Mills amplitudes

Mogull, David Gustav January 2017 (has links)
Pure Yang-Mills amplitudes with all external gluons carrying positive helicity, known as all-plus amplitudes, have an especially simple structure. The tree amplitudes vanish and, up to at least two loops, the loop-level amplitudes are related to those of N = 4 super-Yang-Mills (SYM) theory. This makes all-plus amplitudes a useful testing ground for new methods of simplifing more general classes of amplitudes. In this thesis we consider three new approaches, focusing on the structure before integration. We begin with the planar (leading-colour) sector. A D-dimensional local-integrand presentation, based on four-dimensional local integrands developed for N = 4 SYM, is developed. This allows us to compute the planar six-gluon, two-loop all-plus amplitude. Its soft structure is understood before integration, and we also perform checks on collinear limits. We then proceed to consider subleading-colour structures. A multi-peripheral colour decomposition is used to find colour factors based on underlying tree-level amplitudes via generalised unitarity cuts. This allows us to find the integrand of the full-colour, two-loop, five-gluon all-plus amplitude. Tree-level BCJ relations, satisfied by amplitudes appearing in the cuts, allow us to deduce all the necessary non-planar information for the full-colour amplitude from known planar data. Finally, we consider representations satisfying colour-kinematics duality. We discuss obstacles to finding such numerators in the context of the same five-gluon amplitude at two loops. The obstacles are overcome by adding loop momentum to our numerators to accommodate tension between the values of certain cuts and the symmetries of certain diagrams. Control over the size of our ansatz is maintained by identifying a highly constraining, but desirable, symmetry property of our master numerator.
284

A Bang-Bang All-Digital PLL for Frequency Synthesis

January 2012 (has links)
abstract: Phase locked loops are an integral part of any electronic system that requires a clock signal and find use in a broad range of applications such as clock and data recovery circuits for high speed serial I/O and frequency synthesizers for RF transceivers and ADCs. Traditionally, PLLs have been primarily analog in nature and since the development of the charge pump PLL, they have almost exclusively been analog. Recently, however, much research has been focused on ADPLLs because of their scalability, flexibility and higher noise immunity. This research investigates some of the latest all-digital PLL architectures and discusses the qualities and tradeoffs of each. A highly flexible and scalable all-digital PLL based frequency synthesizer is implemented in 180 nm CMOS process. This implementation makes use of a binary phase detector, also commonly called a bang-bang phase detector, which has potential of use in high-speed, sub-micron processes due to the simplicity of the phase detector which can be implemented with a simple D flip flop. Due to the nonlinearity introduced by the phase detector, there are certain performance limitations. This architecture incorporates a separate frequency control loop which can alleviate some of these limitations, such as lock range and acquisition time. / Dissertation/Thesis / M.S. Electrical Engineering 2012
285

Aplicações da mecânica não extensiva na astrofísica de pequenos corpos do sistema solar

Betzler, Alberto Silva 28 August 2015 (has links)
Submitted by Alberto Silva Betzler (a_betzler@yahoo.com) on 2017-06-26T17:30:43Z No. of bitstreams: 1 tese_betzler.pdf: 7923258 bytes, checksum: 4fe67694cac7f7b562eafc89f55cce3b (MD5) / Approved for entry into archive by Flávia Sousa (flaviabs@ufba.br) on 2017-06-28T14:32:11Z (GMT) No. of bitstreams: 1 tese_betzler.pdf: 7923258 bytes, checksum: 4fe67694cac7f7b562eafc89f55cce3b (MD5) / Made available in DSpace on 2017-06-28T14:32:11Z (GMT). No. of bitstreams: 1 tese_betzler.pdf: 7923258 bytes, checksum: 4fe67694cac7f7b562eafc89f55cce3b (MD5) / Pequenos corpos do sistema solar são asteroides, cometas e poeira interplanetária. Os meteoros são produzidos pela interação de velozes grãos de poeira com a atmosfera terrestre. Esses fragmentos de rocha são presumivelmente oriundos dos asteroides e cometas, em passagens próximas da Terra, ou são transportados de outras regiões do sistema solar por processos dinâmicos. Como estes processos não são plenamente conhecidos, é importante a obtenção da maior quantidade possível de parâmetros físicos e orbitais dos meteoros. Dentro desse contexto, será apresentado o esquema de construção e operação de uma estação para detecção de meteoros, equipada com uma câmera ``all sky'' de TV. Este instrumento ajudou a suprir a carência de iniciativas de observação de meteoros no hemisfério sul. As magnitudes dos meteoros detectados pela estação foram bem modeladas por uma q-exponencial, que é uma função oriunda da mecânica estatística não extensiva de Tsallis. Além de sua validade no estudo dos meteoros, as q-distribuições são adequadas para modelar dados populacionais de asteroides, meteoritos e dos lampejos de luz (flashes) gerados pela colisão de meteoroides com massa da ordem de alguns quilogramas com a Lua. Os resultados obtidos das q-distribuições no estudo dos pequenos corpos do sistema solar são discutidos neste trabalho.
286

Do dito ao feito: exclusão /inclusão na escola

Abenhaim, Evanir January 2006 (has links)
143 f. / Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-04-24T18:41:01Z No. of bitstreams: 1 Evanir Abenhaim Seg.pdf: 700126 bytes, checksum: 9bc530eb991a825d8fff43ab0b78917c (MD5) / Approved for entry into archive by Maria Auxiliadora Lopes(silopes@ufba.br) on 2013-04-30T20:09:46Z (GMT) No. of bitstreams: 1 Evanir Abenhaim Seg.pdf: 700126 bytes, checksum: 9bc530eb991a825d8fff43ab0b78917c (MD5) / Made available in DSpace on 2013-04-30T20:09:46Z (GMT). No. of bitstreams: 1 Evanir Abenhaim Seg.pdf: 700126 bytes, checksum: 9bc530eb991a825d8fff43ab0b78917c (MD5) Previous issue date: 2006 / No presente trabalho, busca-se verificar como os documentos oficiais sobre educação para todos fundamentaram mudanças numa escola de Salvador/BA para que ela seja reconhecida pela Secretaria da Educação da Bahia e pelo Ministério da Educação, como escola inclusiva. Para tanto, realizou-se levantamento bibliográfico e estudo dos principais documentos, nacionais e internacionais, que propõem a transformação da escola regular em escola inclusiva, no intuito de levantar as características essenciais da escola inclusiva. A partir desse estudo, realizou-se uma investigação qualitativa de abordagem etnográfica, no período de 17 de agosto de 2004 a 13 de janeiro de 2005. Os instrumentos para a coleta de dados formam, concomitantemente, observação direta nas salas de aula e na sala dos professores, observação participante e entrevistas semidiretivas. O estudo, a análise e a interpretações dos dados, realizados à luz de abordagens multirreferenciadas, evidenciam que as grandes inovações educacionais do momento apontam para a possibilidade da abertura das escolas à diversidade humana. Busca-se, ao final do trabalho, contribuir para a transformação da escola regular em escola que acolha a diversidade humana. / Salvador
287

Magnetization reversal mechanism leading to all-optical helicity-dependent switching / Mécanisme de retournement d'aimantation entraînant le retournement tout-optique dépendant de l'hélicité

Hadri, Mohammed Salah El 19 September 2016 (has links)
Le contrôle de l’aimantation sans application de champ magnétique externe est un domaine de recherche en plein essor, étant prometteur pour les applications technologiques d’enregistrement magnétique et de spintronique. En 2007, Stanciu et al. ont découvert la possibilité de retourner l’aimantation dans un film fait d’alliage ferrimagnétique de GdFeCo en utilisant des impulsions laser femtoseconde. Longtemps cantonné aux alliages de GdFeCo, ce retournement tout-optique s’avère un phénomène plus général, puisqu’il a été mesuré plus récemment dans une large variété de matériaux ferrimagnétiques et ferromagnétiques. Cette découverte a ainsi ouvert la voie à l’intégration de l’écriture tout-optique dans l’industrie des mémoires magnétiques. Néanmoins, l’ensemble des modèles théoriques expliquant le retournement tout-optique dans le GdFeCo ne semblent pas s’appliquer aux autres matériaux magnétiques, mettant ainsi en question l’unicité de l’origine microscopique de ce phénomène. Au cours de cette thèse, nous avons étudié la réponse aux impulsions laser femtoseconde des alliages ferrimagnétiques et des multicouches ferromagnétiques, dans l'objectif d'élucider divers aspects du mécanisme du retournement optique. Nous avons élucidé expérimentalement les paramètres magnétiques gouvernant le retournement tout-optique. Nous avons montré que l’observation du retournement tout-optique nécessite des domaines magnétiques plus grands que la taille du faisceau laser pendant le processus de refroidissement, un critère qui est commun à la fois aux matériaux ferrimagnétiques et ferromagnétiques. En outre, nous nous sommes intéressés à l’intégration du retournement tout-optique dans des dispositifs de spintronique. Grâce à une caractérisation temporelle de l’aimantation dans des croix de Hall via l’effet Hall extraordinaire, nous avons distingué entre deux types de mécanismes du retournement optique. Le premier type est un retournement purement thermique obtenu avec une impulsion unique dans les alliages ferrimagnétiques de GdFeCo, tandis que le deuxième type est un retournement cumulative et à deux régimes dans les alliages ferrimagnétiques de TbCo et les multicouches ferromagnétiques de Co/Pt. Ce dernier consiste en une formation indépendante de l’hélicité de multidomaines magnétiques suivie d'une ré-aimantation dépendante de l'hélicité sur plusieurs dizaines de millisecondes. / The control of magnetization without external magnetic fields is an emergent field of research due to the prospect of impacting many technological applications such as magnetic recording and spintronics. In 2007, Stanciu et al. discovered an intriguing new possibility to switch magnetization in a ferrimagnetic GdFeCo alloy film using femtosecond laser pulses. This all-optical switching of magnetization had long been restricted to GdFeCo alloys, though it turned out to be a more general phenomenon for a variety of ferromagnetic and ferromagnetic materials. This discovery paved the way for an integration of the all-optical writing in storage industries. Nevertheless, the theoretical models explaining the switching in GdFeCo alloys films do not appear to apply in the other materials, thus questioning the uniqueness of the microscopic origin of all-optical switching. In this thesis, we have investigated the response of femtosecond laser pulses in ferrimagnetic alloys and ferromagnetic multilayers to the action of femtosecond laser pulses, in order to elucidate several aspects of the all-optical switching mechanism. We have experimentally studied the magnetic parameters governing the all-optical switching. We showed that the observation of all-optical switching requires magnetic domains larger than the laser spot size during the cooling process; such a criterion is common for both ferrimagnets and ferromagnets. Furthermore, we have investigated the integration of all-optical switching in spintronic devices via the anomalous Hall effect. Through a time-dependent electrical investigation of the magnetization in Hall crosses, we distinguished between two types of all-optical switching mechanisms. The first type is the single-pulse helicity-independent switching in ferrimagnetic GdFeCo alloy films as shown in previous studies, whereas the second is a two regimes helicity-dependent switching in both ferrimagnetic TbCo alloys and ferromagnetic Co/Pt multilayers. The latter consists in a step-like helicity-independent multiple-domain formation followed by a helicity-dependent remagnetization on several tens of milliseconds.
288

Saúde em todas as políticas : reflexões para desenvolvimento de um Massive Open Online Course (MOOC)

Brites, Liara Saldanha January 2017 (has links)
Esta Dissertação tem como objetivo analisar e sistematizar informações (referências bibliográficas e experiências) sobre Saúde em Todas as Políticas (STP) - abordagem da Organização Mundial da Saúde (OMS), a fim de propor o roteiro de um Curso Online Aberto e Massivo (MOOC - abreviação em inglês de Massive Open Online Courses) sobre o tema STP. De cunho exploratório e abordagem mista, utilizou-se a revisão bibliográfica e a análise documental para produzir os seguintes produtos/resultados: a) um artigo original que apresenta o resultado de buscas no diretório MOOC-List.com, sobre os MOOCs já existentes no campo da saúde, no mundo e no Brasil; b) uma lista de práticas brasileiras sobre STP, a partir do site Salud en Todas Las Políticas en Las Américas; c) uma sistematização dos Workshop propostos pela OMS - Health in All Policies: Training Manual (OMS, 2015) e busca de outras referências para complementar e subsidiar o roteiro proposto. A análise e sistematização dos dados e informações coletados resultaram na proposta do roteiro de aprendizagem: 1) Introdução ao MOOC, sobre apresentação geral do Curso; 2) (re)pensar a saúde, sobre os conceitos ampliado de Saúde, Integralidade, Universalidade e Equidade 3) Motivação para "fazer junto" sobre Intersetoriaidade, Promoção da Saúde, desafios globais e mudanças na saúde; 4) Desigualdades sociais e Iniquidades em saúde, sobre desigualdades em saúde, iniquidades em saúde determinantes da saúde e Determinantes Sociais da Saúde; 5) Doenças Não Transmissíveis (DNT): problema de todos(as), sobre a carga de doenças e DNT; 6) Saúde em Todas as Políticas: um conceito, sobre conceituação de STP; 7) Agendas e combinações para a saúde, sobre Objetivos de Desenvolvimento do Milênio (ODM), Objetivos do Desenvolvimento Sustentável (ODS) e Plano de Ações estratégicas para o enfrentamento das DNT no Brasil 2011-2022; 8) Saúde em Todas as Políticas: marco conceitual, sobre o Quadro/framework de STP. Saúde em Todas as Políticas: marco conceitual, sobre o Quadro/framework de STP. Espera-se que os resultados aqui apresentados facilitem a concretização do Curso, através de uma plataforma de MOOC, permitindo que mais pessoas tenham acesso ao conteúdo que, atualmente, está disponível somente em um idioma e para uma parcela - sejam gestores, trabalhadores ou usuários restrita da população brasileira. Acredita-se, sobretudo, que as reflexões trazidas possam inspirar o uso de outras ferramentas, espaços (virtuais ou não) de aprendizagem e de trocas de experiências e também que os materiais sistematizados possam contribuir com o conhecimento e outros estudos sobre os temas nessa Dissertação abordados. / This dissertation aims to analyze and systematize information (bibliographical references and experiences) about Health in All Policies (HiAP) - approach of the World Health Organization (WHO), in order to propose the script for a Massive Open Online Course (MOOC) about HiAP. From an exploratory and mixed approach, bibliographical review and documentary analysis were used to produce the following products/results: a) an original article that presents the search results in the MOOCList. com directory, about the existing MOOCs in the field of Health, in the world and in Brazil; b) a list of Brazilian HiAP practices, based on the website Salud en Todas Las Políticas en Las Américas; c) a systematization of the Workshops proposed by WHO - Health in All Policies: Training Manual (WHO, 2015) and search for other references to complement and subsidize the proposed script. The analysis and systematization of data and information collected resulted in the proposal of the MOOC script entitled "Introduction to Health in All Policies", with eight Learning Modules: 1) Introduction to MOOC, about general presentation of the Course; 2) (re)thinking about health, about the expanded concepts of Health, Integrality, Universality and Equity; 3) Motivation to "do this together", about Intersectoriality, Health Promotion, global challenges and changes in health; 4) Social inequalities and inequities in health, about inequalities in health, determinants of health and Social Determinants of Health; 5) Noncommunicable Diseases (NCDs): problem of all, about disease burden and NCDs; 6) Health in All Policies: a concept, about HiAP conceptualization; 7) Agendas and Combinations for Health, about Millennium Development Goals (MDGs), Sustainable Development Goals (SDGs) and Strategic Action Plan for coping with NCDs in Brazil 2011-2022; 8) Health in All Policies: conceptual framework, about the framework of STP. It is expected that results presented here facilitate the implementation of the Course through a MOOC platform, allowing more people to have access to content that is currently available only in one language and for a portion - whether managers, workers or users - of the brazilian population. It is believed, above all, that the reflections brought may inspire the use of other tools, learningspaces and exchanges of experiences, and also that systematized materials can contribute with knowledge and other studies on the themes discussed in this Dissertation.
289

Démonstration de l’intérêt des dispositifs multi-grilles auto-alignées pour les nœuds sub-10nm / Demonstrating the interest of self-aligned multiple gate transistors for sub-10nm nodes

Coquand, Rémi 17 December 2013 (has links)
Les nombreuses modifications de la structure du transistor bulk ont permis de poursuivre la miniaturisation jusqu'à sa limite aux nœuds 32/28nm. Les technologies actuelles répondent au besoin d'un meilleur contrôle électrostatique en s'ouvrant vers l'industrialisation de transistors complètement dépletés, avec les architectures sur film mince (FDSOI) ou non planaires (TriGate FinFET bulk). Dans ce dernier cas, le substrat bulk reste limitant pour des applications à basse consommation. La combinaison de la technologie SOI et d'une architecture non-planaire conduit aux transistors TriGate sur SOI (ou TGSOI). Nous verrons l'intérêt de ces dispositifs et démontrerons qu'ils sont compatibles avec les techniques de contrainte. On montrera en particulier les améliorations de mobilité et de courants obtenus sur ces dispositifs de largeur inférieure à 15nm. Des simulations montrent également qu'un dispositif TGSOI peut être compatible avec les techniques de modulation de VT. Enfin, nous démontrons la possibilité de fabriquer des dispositifs ultimes à nanofils empilés avec une grille enrobante par une technique innovante de lithographie tridimensionnelle. La conception, la caractérisation physique et les premiers résultats électriques obtenus seront présentés. Ces solutions peuvent répondre aux besoins des nœuds sub-10nm. / Changing the bulk transistor structure was sufficient so far to fulfill the scaling needs. The current technologies answer the needs of electrostatics control with the industrialization of fully depleted transistors, with thin-film (FDSOI) or non-planar (TriGate FinFet bulk) technologies. In the latter, bulk substrate is still an issue for low power applications. Combining SOI with multiple-gate structure gives rise to TriGate on SOI (or TGSOI). We will discuss the interest of such devices and will demonstrate their compatibility with strain techniques. We will focus on the mobility and current enhancement obtained on sub-15nm width devices. Simulations also demonstrate the compatibility of TGSOI with VT modulation technique. Finally, we demonstrate the fabrication through 3D lithography of ultimate stacked nanowires with a gate-all-around. The conception, physical characterization and first electrical results are presented.
290

All-Optical Helicity dependent switching effect in magnetic thin films / Étude du retournement optique dépendant de l’hélicité dans des couches minces magnétiques

Lambert, Charles-Henri 01 July 2015 (has links)
Depuis une quinzaine d’années, de nombreuses solutions différentes ont été proposés afin de modifier l’aimantations de matériaux sans aucun champ magnétique extérieur appliqué. La manipulation d’aimantation à moindre coût énergétique, de préférence à des échelles de temps ultracourtes, est devenu un enjeu fondamental avec des implications pour les technologies d’enregistrement magnétique et de nouvelles sortes de stockage. Sur ce chemin, le type d’interaction découverte par Stanciu et al. ouvre la voie à l’utilisation de la lumière comme moyen d’exciter et de sonder directement les matériaux magnétiques. La description des théories et modèles existants dans ce domaine permet de nous rendre attentif sur les différents paramètres impliqués par l’interaction des lasers ultrarapides et matériaux magnétiques. L’entrelacement spécifique des impulsions de chaleur et de moment angulaire propre aux lasers ultrarapides est mise en avant afin de discuter de leur rôle dans les phénomènes observés. Le délai des interactions responsables de l’état final de l’aimantation est abordé et notamment la manière dont celle-ci ont un impact sur la façon dont le système se stabilise après une excitation laser. En outre, nous nous sommes intéressés à la relation entre les paramètres matériels et l’état final de l’aimantation obtenue avec un laser ultrarapide. Grâce aux nombreuses classes de matériaux magnétiques existantes les paramètres magnétiques peuvent être ajustés dans une grande gamme de valeurs et de manière entièrement contrôlés. Notre installation d’imagerie magnétique est alors capable de sonder les caractéristiques optiques et la stabilité des domaines après l’excitation. Nous avons finalement démontré que le retournement optique dépendent de l’hélicité peut être observée non seulement dans un grand nombre de couches minces d’alliages de terre rare-métaux de transition (RE-TM) mais aussi dans une variété beaucoup plus large de matériaux, y compris les multicouches et hétérostructures de RE-TM. Nous montrons en outre que les hétérostructures ferrimagnétiques dépourvues de terres rares présentent également un retournement optique. Nous avons en plus développé le contrôle optique de multicouches ferromagnétiques dont des films granulaires actuellement explorés pour l’enregistrement magnétique ultra-haute densité de demain. Notre découverte montre que la manipulation de l’aimantation dans des matériaux magnétiques est un phénomène beaucoup plus général que précédemment suspecté et peut avoir un impact majeur sur l’enregistrement magnétique et le stockage de l’information grâce à l’intégration nouvelle de ce type de contrôle optique dans des bits ferromagnétiques / The possibilities of modifying magnetization without applied magnetic fields have attracted growing attention over the past fifteen years. The low-power manipulation of magnetization, preferably at ultrashort timescales, has become a fundamental challenge with implications for future magnetic information memory and storage technologies. In particular the interplay of laser and magnetism recently discovered by Stanciu et al. opens up new way for light to be used as an excitation and a probe of magnetic materials. A description of the current models and frameworks developed in the field requires a careful look at the different parameters involved through the interaction of ultrafast lasers and magnetic materials. The specific and complex interplay between heat and angular momentum transfer is highlighted in order to discuss the role of each of them in the phenomena observed. The timescales of the different interactions responsible for the final state of magnetization are presented and will impact the way the system recovery after a laser excitation. Besides we were interested in exploring the relation between the material parameters such as anisotropy, ordering temperature and exchange coupling on the final state of magnetization obtained with a laser. Indeed thanks to the many different magnetism classes existing the magnetic parameters can be tuned widely and in a controlled manner. Our imaging setup then is able to probe the optical characteristics and domain stability after the laser excitation. We finally demonstrated that all-optical helicity-dependent switching (AO-HDS) can be observed not only in selected rare earth-transition metal (RE-TM) alloy films but also in a much broader variety of materials, including RE-TM alloys, multilayers and heterostructures. We further show that RE-free Co-Ir-based synthetic ferrimagnetic heterostructures designed to mimic the magnetic properties of RE-TM alloys also exhibit AO-HDS. We further developed the optical control of ferromagnetic materials ranging from magnetic thin films to multilayers and even granular films being explored for ultra-high-density magnetic recording. Our finding shows that optical control of magnetic materials is a much more general phenomenon than previously assumed and may have a major impact on data memory and storage industries through the integration of optical control of ferromagnetic bits

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