Análise não linear da interacção dinâmica solo - estaca em areias secas: um estudo numérico e experimental

Dissertação apresentada à Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Doutor em Engenharia Civil

Recueil de lettres et de pièces originales, et de copies de pièces indiquées comme telles dans le dépouillement qui suit.

Contient : 1 Lettre du roi « LOYS » XI à son « chambellan le seigneur Du Boschaige,... Au Plessis du Parc, le XXVIIIe jour de decembre » ; 2 Lettre du roi « LOYS » XI à son « chambellan le seigneur Du Bouchaige,... A Chasteaulerault, le second jour de janvier » ; 3 Copie de la procédure suivie contre certains particuliers qui s'étaient révoltés en Poitou contre les officiers du roi Louis XI, à l'occasion d'un impôt sur le sel. 1480 ; 4 Lettre du roi « LOYS » XI à son « chambellan le sire Du Bouchaige,... A La Croix Saint Oyan pres Compiengne, le XXIe jour de may » ; 5 Serment de fidélité au roi prêté par « Jaques d'Inteville, seigneur de Chesnayes et d'Arques en Barroys... Peronne, le Ve jour de fevrier... mil CCCC. soixante seize » ; 6 Lettre d'« ANNE DE FRANCE », dame de Beaujeu, « à monseigneur Du Boschaige,... Amboise, le XVIIIe jour de janvier » ; 7 Lettre de « FRANÇOYS », duc de Bretagne, « à monseigneur Du Bouschaige,... Nantes, le XXe jour de may » ; 8 Lettre de « PONS DE RYVIERE » et de « P. LANDOYS à messrs l'archevesque de Vienne et seneschal d'Armignac,... Nantes, XIIe jour de may » ; 9 Lettre du roi « LOYS » XI au seigneur « Du Bouschaige,... Au Plesseis du Parc, le XIIIe jour de janvier » ; 10 Lettre de « JEHAN DE BOURBON à monseigneur Du Bouchaige,... A Molins, le XVe jour de decembre » ; 11 Lettre du roi « LOYS » XI au seigneur « Du Bouchaige,... A Cambray, le neufe jour de may » ; 12 Lettre de « FRANÇOISE » D'ALBRET, comtesse de Nevers, « à monseigneur Du Boschage,... Clamecy, ce XVIe jour d'octobre » ; 13 Lettre du roi « LOYS » XI à « monseigneur Du Bouchaige,... Au Moustier Saint Jehan, le XXVe jour de juillet » ; 14 Lettre du « cardinal Sancti Petri ad Vincula à monseigneur Du Bouchage,... Rome, le IIIe jour de may » ; 15 Lettre de « GUIOT POT au roy... Blois, VIIe jour de fevrier » ; 16 Lettre de « l'evesque de Lombes » au roi. « A Ortaiz, le XVIe jour de may » ; 17 Lettre de « J. DE CORGUILLERAY, evesque de Lodeves », au roi. « Lodeve, le XIe jour de fevrier » ; 18 Lettre du « vicaire de Fescamp au roy. A Calatanun, le segund jour de may » ; 19 Lettre du « viguier et » des « consulz d'Avignon » au roi. « Avignon, le penultime jour de mars » ; 20 Lettre des « consulz de la cité d'Avignon... à monseigneur Du Boschage,... Avignon, le XXXe de janvier » ; 21 Lettre de « JAQUES D'ESTOUTEVILLE au roy... Avranches, XIIIIe jour de fevrier » ; 22 Lettre d'« ANDRE DE LAVAL au roy... Laval, XXIIe jour de fevrier » ; 23 Lettre du comte « DE NEUFCHASTEL au roy. Bar le Duc, IIIIe jour de may » ; 24 Lettre des « gens des comptes du roy... à Paris... à monseigneur Du Bouchage,... Paris, XVIe jour de juing » ; 25 Lettres des « gens de parlement et des comptes du Daulphiné à monseigneur Du Bouchage,... Grenoble, XIIIIe jour d'octobre » ; 26 Lettre du sire D'ALBRET ; 27 Lettre du « sire D'ALEBRET,... Escript à Nerac, le XXIXe d'avril » ; 28 Lettre de « J. DU CAURREL l'ancien au roy... Paris, le premier jour de janvier » ; 29 « Copia litterarum excommunicatoriarum apostolicarum contra... Johannem de Mailly, episcopum noviomensem ». 1469 ; 30 Lettre de « BARTHOLOME BUNEYS au roy... A Morestel, le XXVIIIe de novembre » ; 31 Lettre de « GLAUDE DES MOLINS à reverend Pere en Dieu, monseigneur d'Albie et monseigneur Du Bouchage,... A Amboise, ce dimanche XVIe jour de juing... » ; 32 Mémoire sur la saisie d'effets appartenant à l'évêque de Saint-Flour, Antoine de Lautoin. 1480 ; 33 Lettre « des abbé et couvent de Saint Hubert d'Ardenne au roy... A Saint Hubert, le VIe jour de fevrier ». 1481 ; 34 Lettre de « JEHAN DE THOLONJON, abbé de Tornus... Mascon, le Xe jour de may ». 1482 ; 35 Inventaire des lettres et des livres confiés à « M. de Vyenne » ; 36 Lettre de LOUIS XI à « monseigneur de Lagroye,... Au Plessis du Parc, decembre » ; 37 Lettre de « DE CHAUVIGNY au roy... A Sainct Estienne en Rays, le XXe jour de fevrier » ; 38 Lettre de « BOFFILE DE JUGES à monseigneur Du Bouchage,... A Lesignen, le XXIIIe jour de janvier » ; 39 Lettres du roi LOUIS XI au premier huissier du parlement, en faveur du « bastart de Bourbon, conte de Roussillon. Paris, XIIIIe jour d'aoust mil CCCC. soixante dix sept » ; 40 Copie en latin de la relation de « PETRUS BEDOS », sergent royal de la ville de Rodez, concernant les susdites lettres. 1er septembre 1477 ; 41 Lettre de « MONYQUES au roy... A Menton, le XXIe jour de jullet » ; 42 Lettre de « FELIPE D'ARAGO e DE NAVARA al rey de Francia... En Barcelona, a XXIIII de abril de LXXXI » ; 43 Lettre du comte « DE CARDONA DE PRADES... à mossor de Beusages,... De Orbigue, II de juny, any LXXX » ; 44 Hommage rendu au roi de France par « J. Maure,... En Belvers... XXVII de jolioli, any mill CCCC.LXX sinc »

Proposta de extensão do modelo de expressões intervalares para sincronização multimídia na web

O desenvolvimento de apresentações multimídia sincronizadas para Web se baseia na definição e especificação de relações entre objetos advindos de diversas mídias, que possuem requisitos específicos de desempenho, estando ainda sujeitos à atrasos randômicos durante sua transmissão. Neste sentido, foram definidos modelos para especificação de sincronismo que têm por objetivo estruturar a ordenação destas aplicações de maneira a executar as relações definidas pelo autor quando da exibição coerente no destino. Este trabalho realiza um estudo dos principais modelos utilizados no desenvolvimento de apresentações multimídia sincronizadas, principalmente relacionando-se ao ambiente Web. Desta forma, tornando possível identificar características, vantagens e desvantagens de seus usos, bem como verificar que o Modelo de Expressões Intervalares é adequado a este trabalho, embora ainda apresente algumas deficiências no controle de mídias e interações do usuário. Finalmente, visando solucionar as deficiências encontradas no Modelo de Expressões Intervalares, foi desenvolvida uma proposta de extensão para o mesmo. Ela consiste na criação de um controlador para a interação do usuário e para a manipulação de mídias, chamado mídia invisível; e na definição do operador Sinc-Point, que proporciona ao autor maior flexibilidade na definição da sincronização. Esta proposta apresenta as seguintes vantagens: possibilita ao autor criar sincronizações do tipo “overlaps”, que baseia o disparo de uma mídia durante a apresentação de outra; possibilita ao autor realizar um controle sobre o intervalo para a interação do usuário e para a apresentação de mídias; mantém a consistência da apresentação; não acarreta muitas mudanças no modelo original.

Avaliação de Técnicas de Interpolação de Imagens Digitais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A radial basis function network (RBFN) for function approximation

A radial basis function network (RBFN) circuit for function approximation is presented. Simulation and experimental results show that the network has good approximation capabilities. The RBFN was a squared hyperbolic secant with three adjustable parameters amplitude, width and center. To test the network a sinusoidal and sine function,vas approximated.

SET protein accumulates in HNSCC and contributes to cell survival: Antioxidant defense, Akt phosphorylation and AVOs acidification

Objectives: Determination of the SET protein levels in head and neck squamous cell carcinoma (HNSCC) tissue samples and the SET role in cell survival and response to oxidative stress in HNSCC cell lineages. Materials and Methods: SET protein was analyzed in 372 HNSCC tissue samples by immunohistochemistry using tissue microarray and HNSCC cell lineages. Oxidative stress was induced with the pro-oxidant tert-butylhydroperoxide (50 and 250 mu M) in the HNSCC HN13 cell lineage either with (siSET) or without (siNC) SET knockdown. Cell viability was evaluated by trypan blue exclusion and annexin V/propidium iodide assays. It was assessed caspase-3 and -9, PARP-1, DNA fragmentation, NM23-H1, SET, Akt and phosphorylated Akt (p-Akt) status. Acidic vesicular organelles (AVOs) were assessed by the acridine orange assay. Glutathione levels and transcripts of antioxidant genes were assayed by fluorometry and real time PCR, respectively. Results: SET levels were up-regulated in 97% tumor tissue samples and in HNSCC cell lineages. SiSET in HN13 cells (i) promoted cell death but did not induced caspases, PARP-1 cleavage or DNA fragmentation, and (ii) decreased resistance to death induced by oxidative stress, indicating SET involvement through caspase-independent mechanism. The red fluorescence induced by siSET in HN13 cells in the acridine orange assay suggests SET-dependent prevention of AVOs acidification. NM23-H1 protein was restricted to the cytoplasm of siSET/siNC HN13 cells under oxidative stress, in association with decrease of cleaved SET levels. In the presence of oxidative stress, siNC HN13 cells showed lower GSH antioxidant defense (GSH/GSSG ratio) but higher expression of the antioxidant genes PRDX6, SOD2 and TXN compared to siSET HN13 cells. Still under oxidative stress, p-Akt levels were increased in siNC HN13 cells but not in siSET HN13, indicating its involvement in HN13 cell survival. Similar results for the main SET effects were observed in HN12 and CAL 27 cell lineages, except that HN13 cells were more resistant to death. Conclusion: SET is potential (i) marker for HNSCC associated with cancer cell resistance and (ii) new target in cancer therapy. (C) 2012 Elsevier Ltd. All rights reserved.

Quasi-bound alpha resonant states populated by the 12C(6Li,d) reaction.

Several narrow alpha resonant 16O states were detected through the 12C(6Li,d) reaction, in the range of 12 to 17 MeV of excitation energy. The reaction was measured at a bombarding energy of 25.5 MeV employing the São Paulo Pelletron-Enge-Spectrograph facility and the nuclear emulsion technique. Experimental angular distributions associated with four natural parity quasi-bound states ncar the 4α threshold are presented and compared to DWBA predictions.

Flat-top pulse generation based on a fiber Bragg grating in transmission

We propose and analyze a flat-top pulse generator based on a fiber Bragg grating (FBG) in transmission. As is shown in the examples, a uniform period FBG properly designed can exhibit a spectral response in transmission close to sinc function (in amplitude and phase) in a certain bandwidth, because of the logarithm Hilbert transform relations, which can be used to reshape a Gaussian-like input pulse into a flat-top pulse.

Bandwidth programmable optical Nyquist pulse generation in passively mode-locked fiber laser

We propose and numerically demonstrate a novel simple method to produce optical Nyquist pulses based on pulse shaping in a passively mode-locked fiber laser with an in-cavity flat-top spectral filter. The proposed scheme takes advantage of the nonlinear in-cavity dynamics of the laser and offers the possibility to generate high-quality sinc-shaped pulses with widely tunable bandwidth directly from the laser oscillator. We also show that the use of a filter with a corrective convex profile relaxes the need for large nonlinear phase accumulation in the cavity by offsetting the concavity of the nonlinearly broadened pulse spectrum.

Optical Nyquist pulse generation in mode-locked fibre laser

We numerically show the feasibility of Nyquist optical pulse generation in a mode-locked fibre laser with an in-cavity flat-top spectral filter. The proposed scheme offers the possibility to generate high-quality sinc-shaped pulses with tunable bandwidth.

Design and applications of in-cavity pulse shaping by spectral sculpturing in mode-locked fibre lasers

We review our recent progress on the realisation of pulse shaping in passively-mode-locked fibre lasers by inclusion of an amplitude and/or phase spectral filter into the laser cavity. We numerically show that depending on the amplitude transfer function of the in-cavity filter, various regimes of advanced waveform generation can be achieved, including ones featuring parabolic-, flat-top- and triangular-profiled pulses. An application of this approach using a flat-top spectral filter is shown to achieve the direct generation of high-quality sinc-shaped optical Nyquist pulses with a widely tunable bandwidth from the laser oscillator. We also present the operation of an ultrafast fibre laser in which conventional soliton, dispersion-managed soliton (stretched-pulse) and dissipative soliton mode-locking regimes can be selectively and reliably targeted by adaptively changing the dispersion profile and bandwidth programmed on an in-cavity programmable filter. The results demonstrate the strong potential of an in-cavity spectral pulse shaper for achieving a high degree of control over the dynamics and output of mode-locked fibre lasers.

Control of the in-cavity dynamics in mode-locked fibre lasers

At the level of fundamental research, fibre lasers provide convenient and reproducible experimental settings for the study of a variety of nonlinear dynamical processes, while at the applied research level, pulses with different and optimised features – e.g., in terms of pulse duration, temporal and/or spectral intensity profile, energy, repetition rate and emission bandwidth – are sought with the general constraint of developing efficient cavity architectures. In this talk, we review our recent progress on the realisation of different regimes of pulse generation in passively mode-locked fibre lasers through control of the in-cavity propagation dynamics. We report on the possibility to achieve both parabolic self-similar and triangular pulse shaping in a mode-locked fibre laser via adjustment of the net normal dispersion and integrated gain of the cavity [1]. We also show that careful control of the gain/loss parameters of a net-normal dispersion laser cavity provides the means of achieving switching among Gaussian pulse, dissipative soliton and similariton pulse solutions in the cavity [2,3]. Furthermore, we report on our recent theoretical and experimental studies of pulse shaping by inclusion of an amplitude and phase spectral filter into the cavity of a laser. We numerically demonstrate that a mode-locked fibre laser can operate in dif- ferent pulse-generation regimes, including parabolic, flattop and triangular waveform generations, depending on the amplitude profile of the in-cavity spectral filter [4]. An application of technique using a flat-top spectral filter is demonstrated to achieve the direct generation of sinc-shaped optical Nyquist pulses of high quality and of a widely tuneable bandwidth from the laser [5]. We also report on a recently-developed versa- tile erbium-doped fibre laser, in which conventional soliton, dispersion-managed soli- ton (stretched-pulse) and dissipative soliton mode-locking regimes can be selectively and reliably targeted by programming different group-velocity dispersion profiles and bandwidths on an in-cavity programmable filter [6]. References: 1. S. Boscolo and S. K. Turitsyn, Phys. Rev. A 85, 043811 (2012). 2. J. Peng et al., Phys. Rev. A 86, 033808 (2012). 3. J. Peng, Opt. Express 24, 3046-3054 (2016). 4. S. Boscolo, C. Finot, H. Karakuzu, and P. Petropoulos, Opt. Lett. 39, 438-441 (2014). 5. S. Boscolo, C. Finot, and S. K. Turitsyn, IEEE Photon. J. 7, 7802008 (2015). 6. J. Peng and S. Boscolo, Sci. Rep. 6, 25995 (2016).

In-cavity pulse shaping and dissipative parametric instability mode-locking in fibre lasers

At the level of fundamental research, fibre lasers provide convenient and reproducible experimental settings for the study of a variety of nonlinear dynamical processes, while at the applied research level, pulses with different and optimised features – e.g., in terms of pulse duration, temporal and/or spectral shape, energy, repetition rate and emission bandwidth – are sought with the general constraint of developing efficient cavity architectures. In this work, we review our recent progress on the realisation of pulse shaping in passively- mode-locked fibre lasers by inclusion of an amplitude and phase spectral filter into the laser cavity. We present a fibre laser design in which pulse shaping occurs through filtering of a spectrally nonlinearly broadened pulse in the cavity. This strategy of pulse shaping is illustrated through the numerical demonstration of the laser operation in different pulse-generation regimes, including parabolic, flattop and triangular waveform generations, depending on the amplitude profile of the in-cavity spectral filter [1]. As an application of this general approach, we show that the use of an in-cavity flat-top spectral filter makes it possible to directly generate sinc-shaped Nyquist pulses of high quality and of a widely tunable bandwidth from the laser [2]. We also report on a recently-developed versatile erbium-doped fibre laser, in which conventional soliton, dispersion-managed soliton (stretched-pulse) and dissipative soliton mode-locking regimes can be selectively and reliably targeted by programming different group-velocity dispersion profiles and bandwidths on an in-cavity programmable filter [3]. Further, we report on our recent results on the passive mode locking of a Raman fibre laser by a recently predicted new type of parametric instability – the dissipative Faraday instability [4], where spatially periodic zig-zag modulation of spectrally dependent losses can lead to pattern formation in the temporal domain. High-order harmonic mode locking is achieved in a very simple experimental configuration, with the laser cavity including an optical fibre and two chirped fibre Bragg gratings, and no additional mode-locking elements. The results not only open up new possibilities for the design of mode-locked lasers, but extend beyond fibre optics to other fields of physics and engineering. References [1] S. Boscolo, C. Finot, H. Karakuzu, P. Petropoulos, “Pulse shaping in mode-locked fiber laser by in-cavity spectral filter,” Opt. Lett., vol. 39, pp. 438–441, 2014. [2] S. Boscolo, C. Finot, S. K. Turitsyn, “Bandwidth programmable optical Nyquist pulse generation in passively mode-locked fiber laser,” IEEE Photon. J., vol. 7, 7802008(8), 2015. [3] J. Peng, S. Boscolo, “Filter-based dispersion-managed versatile ultrafast fibre laser,” Sci. Rep., 2016, In press. [4] A. M. Perego, N. Tarasov, D. V. Churkin, S. K. Turitsyn, K. Staliunas, “Pattern generation by dissipative parametric instability,” Phys. Rev. Lett., vol. 116, 028701, 2016.

In-cavity pulse shaping by spectral sculpturing in mode-locked fibre lasers

We review our recent progress on the realisation of pulse shaping in passively-mode-locked fibre lasers by inclusion of an amplitude and/or phase spectral filter into the laser cavity. We numerically show that depending on the amplitude transfer function of the in-cavity filter, various advanced temporal waveforms can be generated, including parabolic, flattop and triangular pulses. An application of this approach using a flattop spectral filter is shown to achieve the direct generation of high-quality sinc-shaped optical Nyquist pulses with a widely tunable bandwidth from the laser oscillator. We also present the operation of an ultrafast fibre laser in which conventional, dispersion-managed and dissipative soliton mode-locking regimes can be selectively and reliably targeted by adaptively changing the dispersion profile and bandwidth programmed on an in-cavity programmable filter.