A magneto-viscoelasticity problem with a singular memory kernel

The existence of solutions to a one-dimensional problem arising in magneto-viscoelasticity is here considered. Specifically, a non-linear system of integro-differential equations is analyzed, it is obtained coupling an integro-differential equation modeling the viscoelastic behaviour, in which the kernel represents the relaxation function, with the non-linear partial differential equations modeling the presence of a magnetic field. The case under investigation generalizes a previous study since the relaxation function is allowed to be unbounded at the origin, provided it belongs to $L^1$; the magnetic model equation adopted, as in the previous results [21,22, 24, 25] is the penalized Ginzburg-Landau magnetic evolution equation.Comment: original research articl

Integração da biblioteca na cidade: projecto de uma biblioteca em Lamego

Desde sempre que as bibliotecas tiveram como função preservar, catalogar e divulgar informação. A presente dissertação tem por objectivo a realização de um projecto de uma biblioteca municipal para a cidade de Lamego. A escolha deste tema surge a propósito de nunca ter sido incluída ao longo do curso, na unidade curricular de projecto, e pelo facto de esta ter uma importante relevância no papel social, sendo fomentadora de leitura e de cultura, geradora de conhecimento, favorecendo a cidadania. Lamego como sendo um dos mais importantes centros urbanos da região do Douro, é como cidade cultural, um verdadeiro museu onde estão guardados exemplares únicos da arte de diversas épocas. Esta magnífica cidade tem nela uma grande lacuna a nível de infra estruturas bibliotecárias. Segundo o manifesto da IFLA/UNESCO sobre bibliotecas públicas, 1994, a biblioteca “...fornece as condições básicas para uma aprendizagem contínua, para uma tomada de decisão independente e para o desenvolvimento cultural dos indivíduos e dos grupos sociais...”. A actual biblioteca de Lamego não responde as necessidades anteriormente referidas, sendo o seu espaço interior bastante reduzido não tendo zonas de estudo adequadas nem o material de estudo necessário para as exigências da população. A proposta de uma nova biblioteca, pretende solucionar os problemas anteriormente referidos sem esquecer todos os elementos arquitectónicos que possam dar um maior carácter ao edifício, para isso, pretende-se compreender o funcionamento de uma biblioteca pública, para além de que procurar-se-á seguir as características projectuais da preexistência da envolvente, assim como, as geometrias que reforçam a continuidade do espaço urbano.Libraries have had the role of preserving, cataloguing and divulging since ever. This dissertation has as main objective the creation of a project of a municipal library for the city of Lamego. The choice of this theme is due to the fact of the curricular project unit never have had a similar theme during the course and due to the fact of playing an important role in society, fomenting the reading and culture, generating knowledge and favouring citizenship. Lamego, one of the most important urban centres in the region of Douro, assumes as a cultural city a complete museum where are kept unique pieces of art from different periods. This magnificent city shows a huge gap in what librarian infrastructures is concerned. According to the IFLA/UNESCO manifest about public librarians, in 1994, the library “... supplies the basic conditions in order to verify a continuous learning, an independent decision making and an individual and social group cultural development...” The current library in Lamego doesn’t satisfy the main needs, being its interior space quite narrow, not having proper study zones neither the study material necessary to cover the population needs. This proposal of a new library tries to solve the problems mentioned before without forgetting the architectonic elements that may add a greater character to the building; in order to do that, is necessary to learn how a public library works; besides that, all the primordial project characteristics should be kept in mind, as well as the geometric lines that reinforce the continuity of the urban space

A compilation of global bio-optical in situ data for ocean-colour satellite applications – version three

A global in-situ data set for validation of ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, starting in 1997, now extends to 2021, which is important for the validation of the most recent satellite optical sensors such as Sentinel 3B OLCI and NOAA-20 VIIRS. The data set comprises in-situ observations of the following variables: spectral remote-sensing reflectance, concentration of chlorophyll-a, spectral inherent optical properties, spectral diffuse attenuation coefficient and total suspended matter. Data were obtained from multi-project archives acquired via open internet services, or from individual projects, acquired directly from data providers. Methodologies were implemented for homogenisation, quality control and merging of all data. Minimal changes were made on the original data, other than conversion to a standard format, elimination of some points after quality control and averaging of observations that were close in time and space. The result is a merged table available in text format. Overall, the size of the data set grew with 151,673 rows, with each row representing a unique station in space and time (cf 136,250 rows in previous version; Valente et al., 2019). Observations of remote-sensing reflectance increased to 68,641 (cf 59,781 in previous version; Valente et al., 2019). There was also a near tenfold increase in chlorophyll data since 2016. Metadata of each in situ measurement (original source, cruise or experiment, principal investigator) are included in the final table. By making the metadata available, provenance is better documented, and it is also possible to analyse each set of data separately. The compiled data are available at https://doi.pangaea.de/10.1594/PANGAEA.941318 (Valente et al., 2022)

Clínica de espécies pecuárias

O presente relatório de Mestrado Integrado em Medicina Veterinária da Universidade de Évora tem como objetivo descrever as atividades realizadas ao longo de cinco meses de estágio curricular. Este está dividido em duas partes distintas. Na primeira parte será feita uma descrição do Hospital Veterinário Muralha de Évora, relatada toda a casuística realizada e acompanhada pelo orientador externo, Dr. José Miguel Leal da Costa, assim como a abordagem de alguns temas mais comuns na clínica de espécies pecuárias. Na segunda parte será apresentada uma revisão bibliográfica sobre a paranfistomatose, uma parasitose que aparenta ser sub-diagnosticada em Portugal. Esta é causada por um trematode do sistema digestivo de ruminantes, do género Paramphistomum, dando-se especial destaque à espécie Paramphistomum cervi, por ser a mais descrita na Europa. Esta segunda parte será concluída com a apresentação de um caso clínico acompanhado durante o estágio; Abstract: Medical practice in livestock species This report on the onset of the Master’s Degree of Veterinary Medicine by the University of Évora has the purpose of describing the activities throughout five months of the curricular traineeship. The same is divided in two different parts. The first part describes the case load followed and practiced upon by the mentor, Dr. José Miguel Leal da Costa, as well as the description of the activities on the Hospital Veterinarian Muralha de Évora, approaching some common situations in large animal practice. The second part presents a review of a parasitosis that is believed to be underdiagnosed in Portugal, namely paramphistomosis. It’s caused by a trematode of the digestive tract of ruminants, Paramphistomum spp., with special interest to the species Paramphistomum cervi, the most common in Europe. This part concludes with the presentation of a clinical case followed during the traineeship and with this parasitosis as a definitive diagnosis

An ocean-colour time series for use in climate studies: the experience of the ocean-colour climate change initiate (OC-CCI)

Ocean colour is recognised as an Essential Climate Variable (ECV) by the Global Climate Observing System (GCOS); and spectrally-resolved water-leaving radiances (or remote-sensing reflectances) in the visible domain, and chlorophyll-a concentration are identified as required ECV products. Time series of the products at the global scale and at high spatial resolution, derived from ocean-colour data, are key to studying the dynamics of phytoplankton at seasonal and inter-annual scales; their role in marine biogeochemistry; the global carbon cycle; the modulation of how phytoplankton distribute solar-induced heat in the upper layers of the ocean; and the response of the marine ecosystem to climate variability and change. However, generating a long time series of these products from ocean colour data is not a trivial task: algorithms that are best suited for climate studies have to be selected from a number that are available for atmospheric correction of the satellite signal and for retrieval of chlorophyll-a concentration; since satellites have a finite life span, data from multiple sensors have to be merged to create a single time series, and any uncorrected inter-sensor biases could introduce artefacts in the series, e.g., different sensors monitor radiances at different wavebands such that producing a consistent time series of reflectances is not straightforward. Another requirement is that the products have to be validated against in situ observations. Furthermore, the uncertainties in the products have to be quantified, ideally on a pixel-by-pixel basis, to facilitate applications and interpretations that are consistent with the quality of the data. This paper outlines an approach that was adopted for generating an ocean-colour time series for climate studies, using data from the MERIS (MEdium spectral Resolution Imaging Spectrometer) sensor of the European Space Agency; the SeaWiFS (Sea viewingWide-Field-of-view Sensor) and MODIS-Aqua (Moderate-resolution Imaging Spectroradiometer-Aqua) sensors from the National Aeronautics and Space Administration (USA); and VIIRS (Visible and Infrared Imaging Radiometer Suite) from the National Oceanic and Atmospheric Administration (USA). The time series now covers the period from late 1997 to end of 2018. To ensure that the products meet, as well as possible, the requirements of the user community, marine-ecosystem modellers, and remote-sensing scientists were consulted at the outset on their immediate and longer-term requirements as well as on their expectations of ocean-colour data for use in climate research. Taking the user requirements into account, a series of objective criteria were established, against which available algorithms for processing ocean-colour data were evaluated and ranked. The algorithms that performed best with respect to the climate user requirements were selected to process data from the satellite sensors. Remote-sensing reflectance data from MODIS-Aqua, MERIS, and VIIRS were band-shifted to match the wavebands of SeaWiFS. Overlapping data were used to correct for mean biases between sensors at every pixel. The remote-sensing reflectance data derived from the sensors were merged, and the selected in-water algorithm was applied to the merged data to generate maps of chlorophyll concentration, inherent optical properties at SeaWiFS wavelengths, and the diffuse attenuation coefficient at 490 nm. The merged products were validated against in situ observations. The uncertainties established on the basis of comparisons with in situ data were combined with an optical classification of the remote-sensing reflectance data using a fuzzy-logic approach, and were used to generate uncertainties (root mean square difference and bias) for each product at each pixel

A Compilation of Global Bio-Optical In Situ Data for Ocean-Colour Satellite Applications

A compiled set of in situ data is important to evaluate the quality of ocean-colour satellite-data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID, AMT, ICES, HOT, GeP&CO), span between 1997 and 2012, and have a global distribution. Observations of the following variables were compiled: spectral remote-sensing reflectances, concentrations of chlorophyll a, spectral inherent optical properties and spectral diffuse attenuation coefficients. The data were from multi-project archives acquired via the open internet services or from individual projects, acquired directly from data providers. Methodologies were implemented for homogenisation, quality control and merging of all data. No changes were made to the original data, other than averaging of observations that were close in time and space, elimination of some points after quality control and conversion to a standard format. The final result is a merged table designed for validation of satellite-derived ocean-colour products and available in text format. Metadata of each in situ measurement (original source, cruise or experiment, principal investigator) were preserved throughout the work and made available in the final table. Using all the data in a validation exercise increases the number of matchups and enhances the representativeness of different marine regimes. By making available the metadata, it is also possible to analyse each set of data separately. The compiled data are available at doi:10.1594/PANGAEA.854832 (Valente et al., 2015)

Integration of new biological and physical retrospective dosimetry methods into EU emergency response plans : joint RENEB and EURADOS inter-laboratory comparisons

Purpose: RENEB, 'Realising the European Network of Biodosimetry and Physical Retrospective Dosimetry,' is a network for research and emergency response mutual assistance in biodosimetry within the EU. Within this extremely active network, a number of new dosimetry methods have recently been proposed or developed. There is a requirement to test and/or validate these candidate techniques and inter-comparison exercises are a well-established method for such validation. Materials and methods: The authors present details of inter-comparisons of four such new methods: dicentric chromosome analysis including telomere and centromere staining; the gene expression assay carried out in whole blood; Raman spectroscopy on blood lymphocytes, and detection of radiation induced thermoluminescent signals in glass screens taken from mobile phones. Results: In general the results show good agreement between the laboratories and methods within the expected levels of uncertainty, and thus demonstrate that there is a lot of potential for each of the candidate techniques. Conclusions: Further work is required before the new methods can be included within the suite of reliable dosimetry methods for use by RENEB partners and others in routine and emergency response scenarios

A compilation of global bio-optical in situ data for ocean-colour satellite applications - version three

A global in situ data set for validation of ocean colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, starting in 1997, now extends to 2021, which is important for the validation of the most recent satellite optical sensors such as Sentinel 3B OLCI and NOAA-20 VIIRS. The data set comprises in situ observations of the following variables: spectral remote-sensing reflectance, concentration of chlorophyll-a, spectral inherent optical properties, spectral diffuse attenuation coefficient, and total suspended matter. Data were obtained from multi-project archives acquired via open internet services or from individual projects acquired directly from data providers. Methodologies were implemented for homogenization, quality control, and merging of all data. Minimal changes were made on the original data, other than conversion to a standard format, elimination of some points, after quality control and averaging of observations that were close in time and space. The result is a merged table available in text format. Overall, the size of the data set grew with 148 432 rows, with each row representing a unique station in space and time (cf. 136 250 rows in previous version; Valente et al., 2019). Observations of remote-sensing reflectance increased to 68 641 (cf. 59 781 in previous version; Valente et al., 2019). There was also a near tenfold increase in chlorophyll data since 2016. Metadata of each in situ measurement (original source, cruise or experiment, principal investigator) are included in the final table. By making the metadata available, provenance is better documented and it is also possible to analyse each set of data separately. The compiled data are available at https://doi.org/10.1594/PANGAEA.941318 (Valente et al., 2022)