A Wireless Monitoring System for Pulse-oximetry Sensors

This paper presents a wireless medical monitoring system. The system permits to receive and process in a single concentrator node (e.g. a laptop or a simple handheld device) the pulse-oximetry signals from one ore several monitored patients without using any wired infrastructure. The system, which is based on a piconet of Bluetooth sensors, can retransmit the medical signals by WLAN and GPRS. The paper describes the practical application scenarios in which this type of systems could be of great utility.Ministerio de Educación y Ciencia TIC2003- 07953-C02-0

Influencia de la comunicación publicitaria en el consumo de alcohol

La literatura científica aduce que a mayor exposición de mensajes publicitarios de bebidas alcohólicas, mayor probabilidad de que estas sean consumidas. Método. La muestra constó de 437 estudiantes universitarios. Los objetivos se centraron en analizar la relación entre mensaje publicitario y consumo. Resultados. Existe relación entre publicidad y consumo, dado que el consumo de los jóvenes coincide con el recuerdo de las campañas en cuanto al tipo de bebida consumida. Conclusiones. Observamos que la publicidad parece ser un instrumento de influencia al consumo de alcohol

Eficacia de dos programas de prevención del consumo de alcohol en función del tipo de aplicador

Currently, it is still unclear how to translate effectively programs validated in research for use in real-world contexts. Among the efforts being made to identify strategies which optimize the application of these programs in everyday practice are tests of the differential effectiveness of the programs depending on the application agent. Method: this study analyses the effects of two programs on alcohol use and its variables as a function of provider type. Two hundred students from the first year of secondary education were distributed among five experimental conditions: four treatment conditions, in which the two programs were applied by teachers at the school or external psychologists, and a control condition. Results: the results suggest that, for both programs, teachers obtain better outcomes in alcohol use and concern about addiction. Conclusions: it is concluded that teachers are the ideal application agents in terms of efficiency, and we discuss the implications for research and preventive practice.En la actualidad no es claro cómo traducir efectivamente los programas validados en la investigación para su aplicación en contextos reales. Entre los esfuerzos que se han realizado está el de identificar estrategias que optimicen la aplicación de estos programas en la práctica cotidiana que tienen diferente efectividad dependiendo del agente que los aplique. Metodología: este estudio analiza los efectos de dos programas sobre el consumo de alcohol y sus variables en función del aplicador. Doscientos estudiantes de primer año de secundaria se distribuyeron en cinco condiciones experimentales: cuatro en condición de tratamiento, en que se aplicaron dos programas aplicados por profesores de la escuela o psicólogos externos, y un grupo control. Resultados: los hallazgos sugieren que en los dos programas los profesores obtienen mejores resultados sobre el consumo de alcohol y la preocupación por la adicción. Conclusiones: se concluye que los profesores son los agentes aplicadores ideales en términos de eficiencia y discutimos las implicaciones que esto tiene para la práctica investigativa y práctica

Dielectric Spectroscopy in Biomaterials: Agrophysics

Being dependent on temperature and frequency, dielectric properties are related to various types of food. Predicting multiple physical characteristics of agri-food products has been the main objective of non-destructive assessment possibilities executed in many studies on horticultural products and food materials. This review manipulates the basic fundamentals of dielectric properties with their concepts and principles. The different factors affecting the behavior of dielectric properties have been dissected, and applications executed on different products seeking the characterization of a diversity of chemical and physical properties are all pointed out and referenced with their conclusions. Throughout the review, a detailed description of the various adopted measurement techniques and the mostly popular equipment are presented. This compiled review serves in coming out with an updated reference for the dielectric properties of spectroscopy that are applied in the agrophysics fiel

Influencia de la comunicación publicitaria en el consumo de alcohol

La literatura científica aduce que a mayor exposición de mensajes publicitarios de bebidas alcohólicas, mayor probabilidad de que estas sean consumidas. Método. La muestra constó de 437 estudiantes universitarios. Los objetivos se centraron en analizar la relación entre mensaje publicitario y consumo. Resultados. Existe relación entre publicidad y consumo, dado que el consumo de los jóvenes coincide con el recuerdo de las campañas en cuanto al tipo de bebida consumida. Conclusiones. Observamos que la publicidad parece ser un instrumento de influencia al consumo de alcohol

Using stable isotopes (δ 17 O, δ 18 O and δD) of gypsum hydration water to ascertain the role of water condensation in the formation of subaerial gypsum speleothems

We analyzed the stable isotopes (δ17O, δ18O and δD) of gypsum hydration water (GHW) in a variety of speleothems, as well as condensation and infiltration waters in five caves of the semiarid gypsum karst of Sorbas basin (Almeria, SE Spain). Microclimate parameters (air temperature, relative humidity and effective condensation rate) were also monitored over an annual cycle. We found that the mother solution from which the majority of gypsum speleothems grow is composed of a mixture of condensation (~ 60%) and infiltration water (~ 40%) that undergoes evaporation. Although evaporation of infiltration water alone was thought to be responsible for secondary gypsum precipitation in vadose caves, our results suggest that condensation can be a major source of water for the formation of gypsum speleothems. The modelled d-excess and Δ17O trajectories of water during the evaporative process confirm that the majority of speleothems precipitate from a mixture of condensation and infiltration water under relative humidity of 75–85%, similar to that measured in the cave atmosphere during winter. These findings have important implications for future studies of gypsum speleothems as paleoenvironmental archives

Physical weathering of carbonate host-rock by precipitation of soluble salts in caves: A case study in El Orón-Arco Cave (Region of Murcia, SE Spain)

The dissolution of carbonate host-rock by freshwater in phreatic or vadose conditions is the most common mechanism for the formation of caves; however, circulation of saline solutions through carbonate materials and precipitation of soluble salts may also play an important role. We studied the stable isotope composition (δ18O and δ34S of sulfate, δ18O and δD of structurally-bound gypsum hydration water and 87Sr/86Sr) and salinity of fluid inclusions in gypsum speleothems found in El Orón-Arco Cave (Cartagena, SE Spain). We suggest that physical weathering of carbonate host-rock was driven by precipitation of soluble sea-salts (mostly gypsum and halite), and this process controlled the recent geomorphological evolution of the cave. The Triassic carbonate host-rock shows clear evidence for salt weathering, including gypsum/halite infillings in cracks of the bedrock, mechanical spalling of the carbonate, and detachment of rock fragments that lead to the formation cave voids and in-situ accumulations of piles of unsorted rubble. Sulfur and oxygen isotopes of gypsum sulfate (3.0‰ < δ18O < 11.6‰ and 16.7‰ < δ34S < 20.7‰) are generally lower than modern seawater sulfate and suggest contributions from a 34S-depleted source (i.e. oxidation of pyrite). The δ18O and δD of gypsum hydration water are relatively low compared to expected values for the evaporation of pure seawater to gypsum saturation, suggesting that gypsum precipitation involved a secondary calcium-sulfate source or recycling of gypsum from previous stages, along with mixing of seawater and meteoric water seepage to the cave. The 87Sr/86Sr in gypsum shows intermediate values between modern seawater and Triassic carbonate values because of interaction between the solution and the bedrock. The salinities of the speleothem-forming solutions are relatively high (13.2 ± 3.2 wt% eq. NaCl) compared to gypsum formed from evaporated brackish solutions (i.e. ~4–8 wt% eq. NaCl) and indicate dissolution of earlier evaporites before secondary gypsum precipitation. This cave-forming mechanism, which is related to saline water circulation and precipitation of evaporitic minerals, may be common in other coastal caves

Author Correction: The potential of gypsum speleothems for paleoclimatology: application to the Iberian Roman Humid Period.

An amendment to this paper has been published and can be accessed via a link at the top of the paper

Organic geochemistry and mineralogy suggest anthropogenic impact in speleothem chemistry from volcanic show caves of the Galapagos

20 páginas.- 8 figuras.- 1 tabla.- 94 referencias.- Supplemental information can be found online at https://doi.org/10.1016/j.isci.2022.104556The network of lava tubes is one of the most unexploited natural wonders of the Galapagos Islands. Here, we provide the first morphological, mineralogical, and biogeochemical assessment of speleothems from volcanic caves of the Galapagos to understand their structure, composition, and origin, as well as to identify organic molecules preserved in speleothems. Mineralogical analyses revealed that moonmilk and coralloid speleothems from Bellavista and Royal Palm Caves were composed of calcite, opal-A, and minor amounts of clay minerals. Extracellular polymeric substances, fossilized bacteria, silica microspheres, and cell imprints on siliceous minerals evidenced microbe-mineral interactions and biologically-mediated silica precipitation. Alternating depositional layers between siliceous and carbonate minerals and the detection of biomarkers of surface vegetation and anthropogenic stressors indicated environmental and anthropogenic changes (agriculture, human waste, and cave visits) on these unique underground resources. Stable isotope analysis and Py-GC/MS were key to robustly identify biomarkers, allowing for implementation of future protection policies.This research work received funding from the European Commission’s 7th Framework Programme under the Marie Curie Intra-European Fellowship PIEF-GA-2012-328689-DECAVE. The financial support from the Spanish Ministry of Science and Innovation (MCIN) under the research project TUBOLAN PID2019- 108672RJ-I00 funded by MCIN/AEI/10.13039/501100011033 is also acknowledged. In addition, this work received support from: i) the Portuguese Foundation for Science and Technology (FCT) under the MICROCENO project (PTDC/CTA-AMB/0608/2020), the EROFIRE project (PCIF-RPG-0079-2018) and the project UID/Multi/04449/2019 for HERCULES/UE. A.Z.M. was supported by the CEECIND/01147/2017 contract from FCT, and the Ramón y Cajal contract (RYC2019-026885-I) from the MCIN. M.L.C. and N.T.J.M. were supported by CEECIND/00349/2017 and 2021/00711/CEECIND contracts, respectively, funded by FCT. F.G. was financially supported by the ‘‘HIPATIA’’ research program of the University of Almería and a Ramón y Cajal Fellowship (RYC2020-029811-I) of MCIN.Peer reviewe