Find_Me: IoT indoor guidance system

This work presents an approach to combine location information from beacons and local building information to give real time location and guidance to a user inside a building. This information can help users orientation inside unknown buildings and the data stored from different users can provide useful information about users movements inside public building. Beacons are installed on the building and emit signals that give a geographic position with an associated imprecision, related with Bluetooth’s range. This uncertainty is handle by building layout and users’ movement in a developed system that maps users position, gives guidance and store user movements. This system is based on a App (Find Me!) for Android OS (Operating System) which captures the Bluetooth Low Energy (BLE) signal coming from the beacon(s) and shows, through a map, the location of the user ‘s smart phone and guide him to the desired destinationinfo:eu-repo/semantics/acceptedVersio

A PORTABLE AND INEXPENSIVE DO-IT-YOURSELF TEMPERATURE SENSOR

Nowadays it is important to have commercial solutions to be used in teaching and research laboratories for the needs. We can have different equipment according to the necessary parameters of control being related to the influence of parameters internal or external to the laboratory practice. However they can't be straightforward to use, their costs can be considerable.  In this context, the do-it-yourself approach is an interesting alternative. In this paper we report the construction of a temperature sensor made by students. Based on a probe taken from a deactivated equipment, the sensor development and validation encompassed its design and building up, the establishment of a connection to a personal computer via USB, the setup of computer-controlled processes, which included remote control, graphical and numerical displaying and signal acquisition, and finally its testing. Tests were performed in water containers with different temperatures, namely boiling, room and ice. The obtained results are comparable to those from a commercial thermometer. This student experiment project allowed not only to contact different disciplines such as chemistry, electronics, and programming but also to gain competencies that can be used outside the class context. We proved it is possible to build tailor-made electronic devices capable of providing useful measurements to chemical purposes old equipment in an inexpensive and trustworthy way

Sarcoidosis and Multiple Myeloma: A Case Report and Literature Review

The existence of a sarcoidosis-lymphoma syndrome has been previously proposed since the relation between sarcoidosis and an increased risk of lymphoproliferative disorders is well established. Multiple myeloma is a malignant multifocal proliferation of clonal plasma cells within the bone marrow, and its association with sarcoidosis has been rarely described. We present a concurrent diagnosis of sarcoidosis and multiple myeloma and make a brief analysis of the reported cases in the literature. A 65-year-old woman underwent surgery for the excision of a wrist mass that presented 3 years before. Histological analysis showed sarcoid-type epithelioid granulomas without necrosis, establishing soft tissue sarcoidosis. Further evaluation revealed marked interstitial lung parenchyma lesions and large intrathoracic adenopathies. Bronchofibroscopy with transbronchial biopsy confirmed lung sarcoidosis. In addition, blood analysis showed monoclonal IgG kappa gammopathy. A bone marrow biopsy confirmed hypercellularity with 60% plasma cells and plasmocyte infiltration. Thus, the diagnosis of systemic sarcoidosis and multiple myeloma was established simultaneously. In a brief review of the literature, we identified 33 reports of cases with both sarcoidosis and multiple myeloma. We point out the importance of a high level of suspicion for the association of sarcoidosis with malignant haematological diseases such as multiple myeloma.info:eu-repo/semantics/publishedVersio

A propósito do PIB: do crescimento para a sustentabilidade

Congresso realizado na Universidade de Évora, de 14-6 de abril de 2014O produto interno bruto (PIB) foi considerado uma das grandes invenções do século XX. As críticas que entretanto suscitou já conduziram, mais do que à formulação de complementaridades ou correcções, à proposta da sua abolição liminar. Apesar de se manter central na análise económica e definição de políticas, multiplicam-se as tentativas de afirmação de uma lógica alternativa, com a sustentabilidade como motivação e objectivo. A contestação da pretensa objectividade e auto-suficiência do PIB remete, por um lado, para a relatividade dos valores, desde logo para a designada ideologia do crescimento, e, por outro, para a escala da análise. Trata-se tanto de reconhecer a finitude dos recursos disponíveis, que compromete a ideia do crescimento infinito ou ‘sustentável’, como de convocar uma lógica sistémica que situe a economia, e, por maioria de razões, a finança, dentro da sociedade e esta dentro do ambienteGross domestic product (GDP) was deemed one of the great inventions of the 20th century. The criticisms the measure has since attracted have already led to the formulation of complementary or corrective versions rather than proposing its outright abolition. Despite remaining central to economic analysis and the definition of policies, attempts to affirm an alternative logic have proliferated with sustainability as their core underlying motivation and objective. The challenges to the intended objectivity and self-sufficiency of GDP on the one hand relate to the relativity of its values, from the outset the ideological dimension to growth, and, on the other hand, to the scale of analysis. This involves not only due recognition of the finitude of the resources available, and inherently compromising any idea of unending ‘sustainable’ growth, but also evoking a systemic logic that places the economy and, for an overwhelming number of reasons, finance within the scope of society that, in turn, remains within its own environmental boundaries.info:eu-repo/semantics/publishedVersio

Environmental risk assessment in a contaminated estuary: an integrated weight of evidence approach as a decision support tool

Environmental risk assessment of complex ecosystems such as estuaries is a challenge, where innovative and integrated approaches are needed. The present work aimed at developing an innovative integrative methodology to evaluate in an impacted estuary (the Sado, in Portugal, was taken as case study), the adverse effects onto both ecosystem and human health. For the purpose, new standardized lines of evidence based on multiple quantitative data were integrated into a weight of evidence according to a best expert judgment approach. The best professional judgment for a weight of evidence approach in the present study was based on the following lines of evidence: i) human contamination pathways; ii) human health effects: chronic disease; iii) human health effects: reproductive health; iv) human health effects: health care; v) human exposure through consumption of local agriculture produce; vi) exposure to contaminated of water wells and agriculture soils; vii) contamination of the estuarine sedimentary environment (metal and organic contaminants); viii) effects on benthic organisms with commercial value; and ix) genotoxic potential of sediments. Each line of evidence was then ordinally ranked by levels of ecological or human health risk, according to a tabular decision matrix and expert judgment. Fifteen experts scored two fishing areas of the Sado estuary and a control estuarine area, in a scale of increasing environmental risk and management actions to be taken. The integrated assessment allowed concluding that the estuary should not be regarded as impacted by a specific toxicant, such as metals and organic compounds hitherto measured, but by the cumulative risk of a complex mixture of contaminants. The proven adverse effects on species with commercial value may be used to witness the environmental quality of the estuarine ecosystem. This method argues in favor of expert judgment and qualitative assessment as a decision support tool to the integrative management of estuaries. Namely it allows communicating environmental risk and proposing mitigation measures to local authorities and population under a holistic perspective as an alternative to narrow single line of evidence approaches, which is mandatory to understand cause and effect relationships in complex areas like estuaries.info:eu-repo/semantics/publishedVersio

Cutting forces and wear analysis of Si3N4 diamond coated tools in high speed machining

Si3N4 tools were coated with a thin diamond film using a Hot-Filament Chemical Vapour Deposition (HFCVD) reactor, in order to machining a grey cast iron. Wear behaviour of these tools in high speed machining was the main subject of this work. Turning tests were performed with a combination of cutting speeds of 500, 700 and 900 m min−1, and feed rates of 0.1, 0.25 and 0.4 mm rot−1, remaining constant the depth of cut of 1 mm. In order to evaluate the tool behaviour during the turning tests, cutting forces were analyzed being verified a significant increase with feed rate. Diamond film removal occurred for the most severe set of cutting parameters. It was also observed the adhesion of iron and manganese from the workpiece to the tool. Tests were performed on a CNC lathe provided with a 3-axis dynamometer. Results were collected and registered by homemade software. Tool wear analysis was achieved by a Scanning Electron Microscope (SEM) provided with an X-ray Energy Dispersive Spectroscopy (EDS) system. Surface analysis was performed by a profilometer

Unconventional Metallic Magnetism in LaCrSb{3}

Neutron-diffraction measurements in LaCrSb{3} show a coexistence of ferromagnetic and antiferromagnetic sublattices below Tc=126 K, with ordered moments of 1.65(4) and 0.49(4) Bohr magnetons per formula unit, respectively (T=10 K), and a spin reorientation transition at ~95 K. No clear peak or step was observed in the specific heat at Tc. Coexisting localized and itinerant spins are suggested.Comment: PRL, in pres

Construção de tabique no Vale do Douro Sul

O tabique é uma técnica construtiva tradicional portuguesa que usa materiais naturais tal como a terra crua e a madeira. Geralmente um elemento construtivo de tabique é formado por uma estrutura de madeira que é revestida com terra crua. A terra tem um papel importante nestes elementos construtivos porque simultaneamente protege a estrutura de madeira e serve como material de acabamento. A região de Trás-os-Montes e Alto Douro corresponde à parte nordeste de Portugal e é rica em construções antigas de tabique. Grande parte destas construções apresenta um avançado estado de degradação. Este facto aliado à escassez de estudos científicos relativos a esta temática motivou a realização de um trabalho de investigação que se encontra em curso e que visa estudar este tipo de construção e de forma a dar um contributo para futuros trabalhos de reabilitação. Atendendo a que esta região é muito vasta foi necessário fasear o referido trabalho de investigação. Deste modo, subdividiu-se a área de trabalho em seis partes referentes às seis Associações de Municípios da região e que são as seguintes: Alto Tâmega; Terra Quente Transmontana; Terra Fria do Nordeste Transmontano; Vale do Douro Norte; Vale do Douro Sul e Douro Superior. O trabalho que se aqui se propõe é relativo à Associação de Municípios do Vale do Douro Sul e usa dez construções antigas de tabique como amostragem. Para o efeito, foi efectuado um levantamento dessas construções e uma recolha de amostras dos materiais construtivos para estudo laboratorial