A presente pesquisa tem como objetivo estabelecer uma reflexão a respeito de parte de minha produção poética intitulada À Curta Distância. A fim de discernir critérios para tal análise parti de uma contextualização desta produção em relação às vivências artísticas que marcaram o início deste projeto, para, a seguir, estabelecer uma articulação com obras de outros artistas – tanto de antecedentes históricos como praticantes contemporâneos. O fio condutor desta investigação será dividido em dois vetores; o primeiro consiste na busca por situar o surgimento de propostas que abordam o contexto de apresentação como conteúdo da obra. A partir de uma breve descrição das conexões históricas deste tema será possível discernir como este é articulado em minha produção artística. O segundo vetor desta pesquisa é referente ao estudo da relação entre a fotografia e as artes visuais, extraindo daí argumentos para proceder uma análise do uso contemporâneo deste meio, hoje em dia tão difundido nas exposições ao redor do planeta. A relação entre o espaço físico de exposição e a fotografia se faz presente em meu trabalho por meio da criação de um paralelismo entre realidade e representação. A fotografia apresentada ao público representa o próprio ambiente em que o espectador se encontra quando está diante da imagem. Assim, com a criação deste artifício, estimula-se a passagem de uma atenção dirigida somente às propriedades formais do objeto artístico para uma apreensão fenomenológica do espaço ao qual a imagem se refere. / The present research has as objective to establish a reflection regarding part of my poetical production titled In a Short Distance. In order to discern criteria for such analysis I started off a contextualization of this production in relation to the artistic experiences that had marked the beginning of this project, then, in the sequence, establishing relation with works of other artists - as much of historical antecedents as contemporaries practitioners. The conducting wire of this inquiry will be divided in two vectors; the first one consists of the search for pointing out the sprouting of proposals that approach the presentation context as content of the work of art. From one soon description of the historical connections of this subject will be possible to discern how it is articulated in my artistic production. The second vector of this research is referring to the study of the relation between photograph and the visual arts, extracting from there arguments to proceed an analysis about the contemporary use of this medium, nowadays so spread out in the exhibitions around the world. The relation between the photograph and the physical space of exhibition is present in my work by means of the creation of a parallelism between reality and representation. The photograph presented to the public represents the proper environment where the spectator is when he sees the image. Thus, with the creation of this artifice, is possible to turn an attention only directed to the formal properties of the artistic object into a phenomenological apprehension of the real space.

A presente pesquisa tem como objetivo estabelecer uma reflexão a respeito de parte de minha produção poética intitulada À Curta Distância. A fim de discernir critérios para tal análise parti de uma contextualização desta produção em relação às vivências artísticas que marcaram o início deste projeto, para, a seguir, estabelecer uma articulação com obras de outros artistas – tanto de antecedentes históricos como praticantes contemporâneos. O fio condutor desta investigação será dividido em dois vetores; o primeiro consiste na busca por situar o surgimento de propostas que abordam o contexto de apresentação como conteúdo da obra. A partir de uma breve descrição das conexões históricas deste tema será possível discernir como este é articulado em minha produção artística. O segundo vetor desta pesquisa é referente ao estudo da relação entre a fotografia e as artes visuais, extraindo daí argumentos para proceder uma análise do uso contemporâneo deste meio, hoje em dia tão difundido nas exposições ao redor do planeta. A relação entre o espaço físico de exposição e a fotografia se faz presente em meu trabalho por meio da criação de um paralelismo entre realidade e representação. A fotografia apresentada ao público representa o próprio ambiente em que o espectador se encontra quando está diante da imagem. Assim, com a criação deste artifício, estimula-se a passagem de uma atenção dirigida somente às propriedades formais do objeto artístico para uma apreensão fenomenológica do espaço ao qual a imagem se refere. / The present research has as objective to establish a reflection regarding part of my poetical production titled In a Short Distance. In order to discern criteria for such analysis I started off a contextualization of this production in relation to the artistic experiences that had marked the beginning of this project, then, in the sequence, establishing relation with works of other artists - as much of historical antecedents as contemporaries practitioners. The conducting wire of this inquiry will be divided in two vectors; the first one consists of the search for pointing out the sprouting of proposals that approach the presentation context as content of the work of art. From one soon description of the historical connections of this subject will be possible to discern how it is articulated in my artistic production. The second vector of this research is referring to the study of the relation between photograph and the visual arts, extracting from there arguments to proceed an analysis about the contemporary use of this medium, nowadays so spread out in the exhibitions around the world. The relation between the photograph and the physical space of exhibition is present in my work by means of the creation of a parallelism between reality and representation. The photograph presented to the public represents the proper environment where the spectator is when he sees the image. Thus, with the creation of this artifice, is possible to turn an attention only directed to the formal properties of the artistic object into a phenomenological apprehension of the real space.

A presente pesquisa tem como objetivo estabelecer uma reflexão a respeito de parte de minha produção poética intitulada À Curta Distância. A fim de discernir critérios para tal análise parti de uma contextualização desta produção em relação às vivências artísticas que marcaram o início deste projeto, para, a seguir, estabelecer uma articulação com obras de outros artistas – tanto de antecedentes históricos como praticantes contemporâneos. O fio condutor desta investigação será dividido em dois vetores; o primeiro consiste na busca por situar o surgimento de propostas que abordam o contexto de apresentação como conteúdo da obra. A partir de uma breve descrição das conexões históricas deste tema será possível discernir como este é articulado em minha produção artística. O segundo vetor desta pesquisa é referente ao estudo da relação entre a fotografia e as artes visuais, extraindo daí argumentos para proceder uma análise do uso contemporâneo deste meio, hoje em dia tão difundido nas exposições ao redor do planeta. A relação entre o espaço físico de exposição e a fotografia se faz presente em meu trabalho por meio da criação de um paralelismo entre realidade e representação. A fotografia apresentada ao público representa o próprio ambiente em que o espectador se encontra quando está diante da imagem. Assim, com a criação deste artifício, estimula-se a passagem de uma atenção dirigida somente às propriedades formais do objeto artístico para uma apreensão fenomenológica do espaço ao qual a imagem se refere. / The present research has as objective to establish a reflection regarding part of my poetical production titled In a Short Distance. In order to discern criteria for such analysis I started off a contextualization of this production in relation to the artistic experiences that had marked the beginning of this project, then, in the sequence, establishing relation with works of other artists - as much of historical antecedents as contemporaries practitioners. The conducting wire of this inquiry will be divided in two vectors; the first one consists of the search for pointing out the sprouting of proposals that approach the presentation context as content of the work of art. From one soon description of the historical connections of this subject will be possible to discern how it is articulated in my artistic production. The second vector of this research is referring to the study of the relation between photograph and the visual arts, extracting from there arguments to proceed an analysis about the contemporary use of this medium, nowadays so spread out in the exhibitions around the world. The relation between the photograph and the physical space of exhibition is present in my work by means of the creation of a parallelism between reality and representation. The photograph presented to the public represents the proper environment where the spectator is when he sees the image. Thus, with the creation of this artifice, is possible to turn an attention only directed to the formal properties of the artistic object into a phenomenological apprehension of the real space.

Piston telemetry research involves monitoring the temperatures at specific internal location points within a combustion engine piston. The temperatures are detected with type K thermocouples as voltages and processed to convert them into temperatures using cold junction compensation methods. The present system uses a specific sensor designed to operate in the high temperature environment within the piston, reading multiple thermocouples. Because of the reciprocating motion of the piston, power generation is intermittent and available only when the piston reaches near bottom dead centre, using inductive coupling to power the sensors and transmit data to an evaluation unit for data processing. The planned system involves designing and building a prototype telemetry unit using ¿off the shelf¿ components that integrate the reading of thermocouple outputs, signal processing and cold junction compensation. Wireless telemetry is adopted for data transmission with an integrated Bluetooth and microcontroller module. The data acquisition module can be adapted for other sensors by adapting the firmware uploaded to the microcontroller. The hardware electronics are envisaged to be encased in thermal insulation to enable operation in high temperature environments. The considered system requires a power supply for the integrated components in the form of a power generator and that it should meet two criteria: to be located within confined spaces and to be permanently available, without having to dismantle systems to change batteries. The selected method is an induction generator constructed from a coil stator connected to the piston connection rod big end and a permanent magnet rotor connected to the crankshaft. The suggested mechatronic system is validated against the present system by comparing both systems to determine whether wireless telemetry can perform within acceptable tolerances and limits for the specified task. Then, for acceptable performances, reduce costs and include flexibility to operate in multiple environments. Bench testing shows that the power generator is capable of driving the sensors and the Bluetooth integrated DAQ system. / EPSRC and University of Bradford

In the era of Internet of things (IoT), sensor-equipped devices exchange data over networks. In battery powered IoT devices, the lifespan of the devices is often much longer than the battery life, leading to multiple costly and environmentally hazardous battery replacements during the operational life of the devices. As a result, there is a growing interest in using rechargeable batteries that can be wirelessly fast charged to prolong the lifespan of IoT devices and their batteries. In wireless power transfer based on induction, the transmitter and receiver antennas can be accurately modeled as two coils in separate circuits. The transmitter coil, energized by alternating current, generates an oscillating magnetic field that induces an electric field in the nearby receiver coil, following Faraday's law of induction. By connecting a resistive load to the receiver coil, it is then possible to extract energy from the induced electric field. This project investigates inductive fast charging for IoT devices with a focus on the electromagnetic power transfer. Two different types of coil antennas were simulated in a solver based on the finite element method and tested in lab for verification purpose. One was a transformer-like ETD coil and the other a flat spiral coil. Both the transmitter and receiver coils were compensated with a capacitor in series to allow for increased efficiency and power transfer at the designated frequency of 100 kHz. The compensating capacitors were tuned such that frequency bifurcation or frequency splitting was avoided. Due to the higher quality factor of the ETD coil compared to the spiral coil they were compensated differently to operate at the resonance peak. The simulation and the experimental tests agreed well, and the findings indicate that both types of coils demonstrate the ability to transfer high power with high efficiency. Theoretically there is no limit in the power transfer for both types of coils since it is proportional to the square of the excitation voltage. All tested coils exhibited the ability to transfer a power of at least 30 W with an 86 to 92 % efficiency without experiencing any significant temperature elevation. The advantages of each coil depend on the design of the systems surrounding the power transfer unit and the nature of the built charging system. For scenarios where the equivalent load resistance of the battery charger unit on the receiver remains relatively constant throughout the charging process, the spiral coil proves to be a suitable choice due to its inherent capacity for easy dimensioning, allowing optimal efficiency for a specific load resistance. Conversely, if the equivalent load resistance fluctuates significantly during the charging process, the ETD coil would be a better alternative, since it exhibits small load dependence and high efficiency. Finally, to further increase the validity of the simulation model, the full magnetization curve of the ferrite core and a more general core loss model should be implemented to enhance the accuracy in studying the effects of higher harmonics and when operating closer to saturation.

No description available.

Bien qu'ayant beaucoup de succès pour décrire la grande variété de phénomènes de la physique des particules, le Modèle Standard (MS) laisse certaines propriétés de la nature sans explication. Ici, nous allons mettre l'accent sur le traitement différent des chiralités de type gauche et droite dans le cadre du MS. Une façon naturelle d'expliquer cela est de plonger le MS dans un modèle plus fondamental, capable de traiter les chiralités d'une manière symétrique. Cette classe de modèles, connue sous le nom de "modèles à symétrie droite-gauche" (LR models, en anglais), introduit une nouvelle interaction qui couple préférentiellement aux champs "droitiers". Puis, à une haute échelle d'énergie, la symétrie reliant droite et gauche est brisée spontanément donnant naissance au MS et aux phénomènes de violation de symétrie de parité. La manière spécifique par laquelle le mécanisme Brout-Englert-Higgs (BEH) se produit dans les modèles LR peut être sondée par des observables électrofaibles de précision, ce qui sert de premier test de l'extension du MS dans le secteur électrofaible. Comme conséquence du mécanisme BEH dans les modèles LR, de nouveaux bosons de jauge sont présents. Ce sont W’ et Z’, censés être beaucoup plus lourds que les bosons de jauge W et Z afin d'expliquer pourquoi ils n'ont jamais été vus jusqu'à présent. Ces nouvelles particules sont accompagnées d'une riche phénoménologie, comme de nouvelles sources de violation de CP au-delà de celle du MS. En outre, un nouveau secteur scalaire neutre introduit des courants qui changent la saveur (FCNC, en anglais) au niveau des arbres, un processus fortement restreint dans le MS, où il arrive seulement à l'ordre des boucles. L'existence de FCNCs fournit des contraintes extrêmement puissantes sur les modèles LR, et mérite donc une attention spéciale, en particulier lors du calcul des corrections venant de la QCD. Nous calculons donc les corrections au Next-to-Leading Order des effets à de courtes distances venant de la QCD aux contributions du modèle LR aux observables liées au mélange de mésons neutres et sensibles donc aux FCNC.Ensuite, nous considérons l'étude phénoménologique des modèles LR afin de tester leur viabilité et leur structure. Plus particulièrement, nous considérons le cas où des doublets scalaires sont responsables de la brisure du groupe de jauge des modèles LR. A cet effet, nous menons une étude combinée des observables de précision électrofaible, des bornes directes sur la masse des nouveaux bosons de jauge et des observables qui dérivent de l'oscillation des mésons neutres, dans le cas plus simple où la matrice de mixing dans le secteur droit est égal à la matrice CKM. Ces observables sont combinées dans le cadre du paquet CKMfitter d'analyse statistique. La combinaison de différentes classes d'observables doit prendre en compte la particularité des incertitudes théoriques, qui ne sont pas de nature statistique comme d'autres sources d'incertitude. A ce propos, nous considérons aussi la comparaison de différentes modèles d'incertitude théorique, afin de trouver des méthodes bien adaptées à la situation actuelle de notre connaissance des incertitudes théoriques impliquées dans un fit global en physique de la saveur. / Though very successful in explaining a wide variety of particle physics phenomena, the Standard Model (SM) leaves unexplained some properties of nature. Here we focus on the different behaviours of left- and right-handed chiralities, or in other words the violation of parity symmetry. A possible and somewhat natural avenue to explain this feature is to embed the SM into a more symmetric framework, which treats the chiralities on equal footing. This class of models, the Left-Right (LR) Models, introduces new gauge interactions that couple preferentially to right-handed fields. Then, at an energy scale high enough, LR symmetry is spontaneously broken through the Brout-Englert-Higgs (BEH) mechanism, thus giving origin to the SM and to parity violating phenomena. The specific way in which the BEH mechanism operates in LR Models can be probed by EW Precision Observables, consisting of quantities that have been very accurately measured, serving as a first test of consistency for extensions of the SM in the EW sector. We revisit a simple realization of LR Models containing doublet scalars, and consider the phenomenological study of this doublet scenario in order to test the viability and structure of the LR Models. In particular, there is a rich phenomenology associated to the new gauge bosons W’ et Z’ introduced by LR Models, such as new sources of CP violation beyond the one of the SM. Moreover, the extended neutral scalar sector introduces Flavour Changing Neutral Couplings (FCNC) at tree level, which are strongly suppressed in the SM where they arrive first at one loop. FCNCs typically lead to extremely powerful constraints since they contribute to meson-mixing processes, and therefore deserve close attention. For this reason, we consider the calculation of short-distance QCD effects correcting the LR Model contributions to meson-mixing observables up to the Next-to-Leading Order (NLO), a precision required to set solid lower bounds on the LR Model scales. Finally, we combine in a global fit electroweak precision observables, direct searches for the new gauge bosons and meson oscillation observables in the simple case where the right-handed analogous of the CKM mixing-matrix is equal to the CKM matrix itself (a scenario called CKMfitter symmetry). The full set of the observables is combined by using the CKMfitter statistical framework, based on a frequentist analysis and a particular scheme for modeling theoretical uncertainties. We also discuss other possible modelings of theoretical uncertainties in a prospective study for future global flavour fits made by the CKMfitter Collaboration.