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  • KIT Scientific Publishing  (599)
  • Coimbra University Press  (582)
  • English  (617)
  • Portuguese  (564)
  • Greek, Modern (1453- )
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  • 2020-2024  (1,181)
  • 2015-2019
  • 2010-2014
  • 1990-1994
  • 1965-1969
  • 1955-1959
  • 1930-1934
  • 2021  (1,181)
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  • 1965
Collection
Language
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  • 2020-2024  (1,181)
  • 2015-2019
  • 2010-2014
  • 1990-1994
  • 1965-1969
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Year
  • 1
    Publication Date: 2024-04-09
    Description: Radio communications in the range of 60 GHz enable multi-Gigabit/s network access in indoor environments. Due to the propagation characteristics of such signals only very short range radio transmission is feasible. In order to distribute these signals across large distances, analog transmission over optical fiber is considered. In this work, mode-locked laser diodes serve as optoelectronic oscillators for the generation of such signals. Their system-relevant properties are studied in detail.
    Keywords: T1-995 ; millimeter wave communications ; mode-locked lasers ; wireless personal area networks ; radio-over-fiber ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 2
    Publication Date: 2023-12-20
    Description: This work is about random measures stationary with respect to a possibly non-transitive group action. It contains chapters on Palm Theory, the Mass-Transport Principle and Ergodic Theory for such random measures. The thesis ends with discussions of several new models in Stochastic Geometry (Cox Delauney mosaics, isometry stationary random partitions on Riemannian manifolds). These make crucial use of the previously developed techniques and objects.
    Keywords: QA1-939 ; mass-transport principle ; Random measure ; ergodic theory ; Stochastic Geometry ; Palm theory ; bic Book Industry Communication::P Mathematics & science
    Language: English
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  • 3
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    Coimbra University Press
    Publication Date: 2024-04-05
    Keywords: B1-5802 ; Portuguese ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy
    Language: Portuguese
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  • 4
    Publication Date: 2022-01-31
    Description: In this work we try to make an approach to the shared history between two brothers countries and not always friends such as Portugal and Spain and the atlantic projection that has presided over much of its historical evolution and is also an essential part of its contemporary foreign policy. A dialogue that also acquires different nuances, since the same concept of atlanticity has different connotations for Spain and Portugal. From these various perspectives, Spain and Portugal continue to have an important mission in the challenges in today's world as interlocutors and transmission belts between different global spaces. This historical evolution and the new challenges of the atlantic world are intended to be addressed in the texts of the authors presented to them in this dossier and that address very diverse historical periods from the beginning of the 20th century to the present day. Facing the most diverse possible perspectives, whether political, geostrategic, economic, social and cultural.
    Keywords: Border ; Outermost regions of the european union ; Contemporaneity ; Europe ; United states of america ; Culture ; Africa ; Interdisciplinarity ; Multi-territorial networks ; Azores ; Atlantic
    Language: Portuguese
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  • 5
    Publication Date: 2022-01-31
    Keywords: Portuguese
    Language: Portuguese
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  • 6
    Publication Date: 2022-01-31
    Description: In the continuation of what has been produced in the series "Risks and Disasters", this volume assumes the thematic continuity, in a more systematic and holistic logic. It concerns, in particular, the theme of "Anthropic disasters. An integral approach", so it is a very unusual character. Let's say that the type of risks it deals with, the synthesis nature it presents and the organizational structure chosen, gives it a singular character in the contemporary world context. In the path of anthropic disasters, two major risk groups were considered, namely technological and social. The first relate to structural systems to support human activity, such as transport, civil construction, urban spaces (fires, waste) and water resources. The second is associated with social action, and it addresses issues ranging from conflict to Urbicicide.
    Keywords: Social risks ; Safety culture ; Catastrophes ; Technological risks
    Language: Portuguese
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  • 7
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    KIT Scientific Publishing
    Publication Date: 2023-12-21
    Description: In this work, a novel measurement system for the analysis of the gyrotron RF output spectrum was developed. It enables unprecedented time dependent measurements within a large bandwidth, dynamic range and unambiguous RF indication in the entire D-Band (110-170 GHz). Special attention was given to the investigation of parasitic RF oscillations, and the analysis of the interplay of thermal cavity expansion and ionization-based space charge neutralization at the start of long RF pulses.
    Keywords: T1-995 ; spectrum analysis ; Mikrowellenmesstechnik ; millimeter waves ; Gyrotron ; Spektralanalyse ; Millimeterwellen ; microwave measurement techniques ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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  • 8
    Publication Date: 2023-12-20
    Description: A predictive tracking approach and a novel method for visual motion compensation are introduced, which accurately reconstruct and compensate the deformation of the elastic object, even in the case of complete measurement information loss. The core of the methods involves a probabilistic physical model of the object, from which all other mathematical models are systematically derived. Due to flexible adaptation of the models, the balance between their complexity and their accuracy is achieved.
    Keywords: QA75.5-76.95 ; stochastic estimation ; physics-based modeling ; robotics ; distributed parameter systems ; beating heart surgery ; video processing ; probabilistic models ; bic Book Industry Communication::U Computing & information technology::UY Computer science
    Language: English
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  • 9
    Publication Date: 2022-01-31
    Description: Trata-se de uma obra que reúne os retratos a óleo dosantigos professores da Faculdade de Direito, da autoria de Fernando Rosário. Osretratos encontram-se presentes na Sala do Conselho Científico da Faculdade deDireito da Universidade de Coimbra. Esta galeria foi patrocinada pela FundaçãoEng. António de Almeida.
    Language: Portuguese
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  • 10
    Publication Date: 2024-04-09
    Description: The aim of this work was to identify the patterns that can induce heating around implanted cardiac pacemakers during MRI and to develop strategies to counteract them. Two approaches were taken: computer simulations of the occurring electromagnetic field distributions and in-vitro experiments using phantoms in real MRI devices, both for conventional bore-hole and new open MRI systems. Using the open MRI, the observed heating could be reduced significantly.
    Keywords: T1-995 ; pacemaker ; MRI ; numerical field calculation ; biomedical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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