34 documents found, page 1 of 4

Airsense - Low-Cost Indoor Air Quality Monitoring Wireless System

This manuscript presents the project aimed at creating a low-cost indoor air quality monitoring system. By using a variety of sensors connected to an ESP32 microcontroller, the system measures specific parameters such as carbon dioxide, volatile organic compounds, particulate matter, temperature, humidity, and pressure. The sensor-recorded measurements are sent to an InfluxDB database via Wi-Fi, where they are ...

Digitalization and international digital marketing: A review and research agenda

With the growing need for digitalization in international marketing, this article explores how digital transformation facilitates the interaction between producers and consumers, promoting the introduction of products and services into the global market in a more efficient and cost effective way. Digital technologies can assist processes, reduce costs, increase competitiveness and enable entry into new markets,...

BeSafeSlide – A Landslide early warning soft technology prototype to improve co...

Two-level adaptive sampling for illumination integrals using Bayesian Monte Carlo

Bayesian Monte Carlo (BMC) is a promising integration technique which considerably broadens the theoretical tools that can be used to maximize and exploit the information produced by sampling, while keeping the fundamental property of data dimension independence of classical Monte Carlo (CMC). Moreover, BMC uses information that is ignored in the CMC method, such as the position of the samples and prior stochas...

Late holocene benthic Foraminifera of the Roman Lacus ligustinus (SW Spain): a ...

This paper studies the Late Holocene benthic foraminifera from a continuous core extracted in the Doliana National Park (SW Spain). In this core, the foraminiferal assemblages confirm the Late Holocene lagoon (historically so-called Locus Ligustinus) during the Roman period, about 2000 years ago. The more open, deepest areas of this lagoon were dominated by Ammonia tepida and Elphidium spp., while Haynesina ger...

Chronological assessment of della Robbia sculptures by using PIXE, neutrons and...

Portuguese museums and private collectors gather a variety of Italian glazed terracotta sculptures attributed to the della Robbia workshop, particularly active between the 15th and 16th centuries. Compositional studies of the paste using INAA, PGAA and XRD and enamel using PIXE, and luminescence protocols, were used as a tool to ascertain the attribution of the sculptures to della Robbia workshop. Geochemical a...

Geochemistry, luminescence and innovative dose rate determination of a Chalcoli...

An interdisciplinary approach comprising archaeological, chemical, mineralogical, and luminescence data was applied to a better understanding of the fill dynamic and chronologies of a calcite-rich negative archaeological feature from Southern Portugal. This work aims to contribute to the assessment of the human involvement in the backfilling actions of a negative archaeological feature from a Chalcolithic site,...

Photonic modulation of epidermal growth factor receptor halts receptor activati...

Epidermal Growth Factor Receptor (EGFR) plays a key role in regulating cell survival, proliferation and migration, and its overexpression and activation has been correlated with cancer progression. Cancer therapies targeting EGFR have been applied in the clinic with some success. We show, by confocal microscopy analysis, that illumination of adenocarcinomic human alveolar basal epithelial cells (Human A549 EGFR...

Portuguese propolis: a source of valuable bioactivities

Rare earth elements, iron and manganese in ochre-precipitates and wetland soils...

The rare earth elements (REE) along with iron and manganese distribution in ochre-precipitates and wetland soils in a passive system for acid mine drainage treatment (Jales, Portugal) was studied. The results obtained by instrumental neutron activation analysis showed a higher incorporation of the light REE (particularly La and Ce) by the ochre-precipitates resulting from the mine water-limestone interaction. T...