A nossa intenção, ao elaborarmos o presente Esboço Cronológico é justamente a de facultar pistas de investigação que possam ser utilizadas por quem se sentir motivado para elaborar a biografia de D. Manuel Vieira de Matos, bispo da Guarda e depois arcebispo de Braga, mormente em quanto interessa à sua vida na diocese egitaniense, já que, no relativo a Braga, cremos ser apenas necessário actualizar a biografia segundo Monsenhor José Augusto Ferreira, introduzindo nela alguns aspectos a que o erudito autor terá prestado menor apreço.

Este trabalho de investigação centra-se na obra pedagógica do Padre Augusto Gomes Pinheiro e no seu legado. Vulto da igreja, cedo sentiu um forte apelo pela educação que o leva a fundar um dos mais antigos colégios católicos de Lisboa, o Colégio Manuel Bernardes, no Paço do Lumiar. Uma vez que a instituição conta com setenta e seis anos de existência, nas suas bases conceptuais encontramos um conjunto de valores, crenças e ideologias que ao longo do tempo foram marcando presença na pedagogia, nos regulamentos, nos rituais e cerimónias, mobilizando os seus intervenientes em torno de um projeto comum, dotado de uma identidade própria. Foi nossa intenção apreender a singularidade da instituição no âmbito da educação que se encontrava institucionalizada num determinado tempo histórico. Essa apreensão permite passar do singular ao global, num contínuo processo construtivo da história das instituições escolares. Assumimos primordialmente que não nos movia o anseio de realizar uma monografia. Apreendemos a sua historicidade, constituindo um estudo de caso passível de ser questionado do ponto de vista histórico. Passámos por um processo descritivo mas simultaneamente analítico, dos tempos, das pessoas e dos lugares. A investigação desenvolvida assentou numa análise documental com recurso a fontes maioritariamente provenientes da própria instituição, sendo algumas, parte integrante do espólio do fundador. A pesquisa histórica efetuada e a análise documental descrita fizeram-nos acreditar na existência de um fio condutor que seguido até à atualidade, expressa os princípios pedagógicos defendidos pelo Padre Gomes Pinheiro.

This article is a result of the research project Transferencias humanas, culturales e ideológicas entre los reinos ibéricos (siglos XIII-XV), financed by the Ministerio de Economía, Industria y Competitividad (HAR2017-89398-P) and coordinated by Doutora Isabel Beceiro Pita (Instituto de Historia-CSIC). This article analyzes the biographical data of Count Enrique Manuel, son of the famous writer Don Juan Manuel, from various points of view. On the one hand, his kinship relations with other descendants of Don Juan Manuel are explained, especially with the kings of Portugal, Castile and Aragon. This close family relationship allows us to understand a second level of analysis: his political leadership during the reigns of Fernando I of Portugal and Juan I of Castile. In those years, a marriage alliance and a succession agreement were prepared that finally failed with the triumph of João I de Avis. Thirdly, the breakdown of his own family is studied, since one of his daughters remained in Portugal and the rest of the children went into exile in Castile. Finally, the religious and symbolic messages used by the Manuel lineage at the end of the 14th century are analyzed within the context of the Portuguese-Castilian rivalry.   Bibliography Handwritten sources Madrid, Real Academia de la Historia, Colección de D. Luis de Salazar y Castro (colección Salazar), D-17, D-21, D-4, M-4, M-5, M-9, M-51, 0-20. Toledo, Archivo Histórico de la Nobleza, Montealegre, carp. 362. Valladolid, Archivo General de Simancas, Escribanía Mayor de Rentas (EMR), serie Mercedes y Privilegios, l. 10. Printed sources As Gavetas da Torre do Tombo, VII. (GAV.XVII, Maços 3-9). Lisboa: Centro de Estudos Históricos Ultramarinos, 1968. Estoria de Dom Nuno Alvrez Pereyra. Ed. de Adelino de Almeida Calado. Coimbra: Universidade de Coimbra, 1991. 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Characteristics of tunable wavelength filters based on a-SiC:H multilayered stacked cells are studied both theoretically and experimentally. Curves of gain vs. wavelength illustrate the optical filter characteristics. A capacitive active band-pass filter model supports experimental data. Results show that the use of a double pi’n/pin a-SiC:H heterostructure as active capacitive filters depends on the wavelength and modulated frequency of the trigger light and on the wavelength of the additional optical bias. The devices combine three indispensable functions of transceivers, amplification, detection and wavelength filtering. Experimental and simulated results show the device combines the properties of active short-pass and long-pass filter sections into a capacitive active band-pass filter.

This paper introduces the use of Visible Light Communication (VLC) to enhance traffic signal efficiency and vehicle trajectory management at urban intersections. By integrating VLC localization with learning-based traffic signal control, a multi-intersection traffic system is proposed. VLC enables communication between connected vehicles and infrastructure through mobile optical receivers. The primary objectives are to reduce waiting times and improve overall traffic safety by accommodating diverse traffic movements during multiple signal phases. Cooperative mechanisms and queue/response interactions balance traffic flow between intersections, enhancing road network performance. A reinforcement learning scheme optimally schedules traffic signals, with agents at each intersection using VLC-enabled vehicle communication to improve traffic flow and overall system optimization. Evaluated using the SUMO urban mobility simulator, the system demonstrates reduced waiting and travel times. The decentralized and scalable nature of this approach highlights its potential applicability in real-world traffic scenarios.

Optical processing devices based on a- SiC:H multilayer architectures are expected to become reconfigurable to perform WDM optoelectronic logic functions and provide as well complex photonic functions such as signal amplification and switching. This thesis, entitled ”Three Transducers for One Photodetector: essays for optical communications”, reports the main work areas to design, control, validate and evaluate the research of a voltage-controllable wavelength selective optical switching based on shifting between positive and negative electrically bias and a photodetector, which enables the filtering function with the detector itself and has the potential to be rapidly optically biasing tuned: System Architecture – In this work area it is defined the basic requirements of the device: light-to-dark sensitivity, colour recognition, selective optical and electrical output response, amplification and opto-electronic conversion to transmit, receive, and/or process intelligence(data).The output multiplexed signals should have a strong nonlinear dependence on the light absorption profile, i.e., on the incident light wavelength, bit rate and intensity under unbalanced light generation of carriers. Experimental Design – This test activities work area allows the evaluation of the results. Multiple monochromatic pulsed communication channels were transmitted together, each one with a specific bit sequence. The combined optical signal was analyzed by reading out, under different applied voltages and optical bias, the generated photocurrent across the device. Depending on the wavelength of the external background and irradiation side, it acts either as a short- or a long- pass band filter or as a band-stop filter Optoelectronic Algorithm Interface – To help improve our understanding of the output multiplexed signal, computer models of monolithic photodetectors are developed. Following control theoretic methods we derive state-space representation and an equivalent circuit optoelectronic simulator. We validate each model and calibrate the spectral gain model by background–probe experiments and truth tables lookup that perform 8-to-1 multiplexer (MUX) and 1-to-8 demultiplexer (DEMUX) functions. Applications – The purpose of this work area is to present a new optical logic architecture that offers considerable improvements in reconfigurability. Tunable WDM converters based on amorphous SiC multilayer photonic active filters are used to build blocks to perform standard digital system operations. The transducers combine the simultaneous demultiplexing operation with the photodetection and self amplification. They are optimized for provide the high-sensitivity needed for low-light applications, such as medicine, lighting, sensing and measurement, and manufacturing. The migration to next generation packet based networks can be much easier and smoother than previously thought, using the emerging a-Si solutions and its integration with plastic optical fiber. It will push the limits of functionality, cost/performance and integration level.

This paper investigates the connected vehicle concept at intersections with traffic signals control and proposes the use of Visible Light Communication (VLC) in Vehicular Communication Systems for vehicle safety applications. A smart vehicle lighting system that combines the functions of illumination, signaling, communications, and positioning is presented. A generic model of cooperative transmissions for vehicular communications services is established. Three specific vehicular communications systems are analyzed. One is for Infrastructure-to-Vehicle communications from the street lamps, located on roadside, to the vehicles; the other is for in line Vehicle-to-Vehicle communications and the last for Vehicle-to-Infrastructure communications from cars to the traffic lights, at the crossroad. An on-off code is used to transmit data. The encoded message contains the ID code of each emitter concomitantly with a traffic message that is received, decoded and resent to another vehicle or to traffic light, in the crossroad. An algorithm to decode the information is established. A phasing traffic flow is presented as a proof of concept.

The redesign of the trajectories though complex, can be accomplished by the application of methods for navigation, guidance and combination of knowledge of road traffic control of vehicles. In this work the communication between the infrastructures and the vehicles, between vehicles and from the vehicles to the infrastructures is performed through Visible Light Communication (VLC) using the street lamps and the traffic signaling to broadcast the information. Vehicle headlamps and taillights are used to transmit data to other vehicles or infrastructures allowing digital safety and data privacy. Data is encoded, modulated and converted into light signals emitted by the transmitters. Tetra-chromatic white sources are used providing a different data channel for each chip. As receivers and decoders, SiC Wavelength Division Multiplexer (WDM) devices, with light filtering properties, are used. The primary objective is to control the arrival of vehicles to an intersection and schedule them to cross at times that minimize delays. A further objective is to allocate delays between left-turns and forward movements, moderating the speed and slot between vehicles travelling in these directions, maintaining a safe distance from one to another. Pedestrians and bicycles are incorporated. A Vehicleto-Everything (V2X) traffic scenario is stablished and bidirectional communication between the infrastructure and the vehicles is tested, using the VLC request/response concept. A phasing traffic flow is developed as a proof of concept. The experimental results confirm the cooperative VLC architecture showing that communication between connected cars is optimized using a request/response concept. An increase in the traffic throughput with least dependency on infrastructure is achieved.