Evaluation of crowdsourcing Wi-Fi radio map creation in a real scenario for AAL applications

Indoor location at room level plays a key role for providing useful services for Ambient Assisted Living (AAL) applications. Wi-Fi fingerprinting indoor location methods are extensively used due to the widespread availability of WiFi infrastructures. A main drawback of Wi-Fi fingerprinting methods is the temporal cost involved in creating the radio maps. Crowdsourcing strategies have been presented as a way to minimize the cost of radio map creation. In this work, we present an extensive study of the issues involved when using crowdsourcing strategies for that purpose. Results provided by extensive experiments performed in a real scenario by three users during two weeks are presented. The main conclusions are: i) crowdsourcing data improves accuracy location in most studied cases; ii) accuracy of Wi-Fi fingerprinting methods decay along time; iii) device diversity is an important issue even when using the same device model

BLE-GSpeed: A new BLE- based dataset to estimate user gait speed

To estimate the user gait speed can be crucial in many topics, such as health care systems, since the presence of difficulties in walking is a core indicator of health and function in aging and disease. Methods for non-invasive and continuous assessment of the gait speed may be key to enable early detection of cognitive diseases such as dementia or Alzheimer’s disease. Wearable technologies can provide innovative solutions for healthcare problems. Bluetooth Low Energy (BLE) technology is excellent for wearables because it is very energy efficient, secure, and inexpensive. In this paper, the BLE-GSpeed database is presented. The dataset is composed of several BLE RSSI measurements obtained while users were walking at a constant speed along a corridor. Moreover, a set of experiments using a baseline algorithm to estimate the gait speed are also presented to provide baseline results to the research community

Differential protein expression analysis to study the pathogenicity of the protozoa parasite Trichomonas Gallinae

Comunicaciones a congreso

Initialization and synchronization of power hardware-in-the-loop simulations : a Great Britain network case study

The hardware under test (HUT) in a power hardware in the loop (PHIL) implementation can have a significant effect on overall system stability. In some cases, the system under investigation will actually be unstable unless the HUT is already connected and operating. Accordingly, initialization of the real-time simulation can be difficult, and may lead to abnormal parameters of frequency and voltage. Therefore, a method for initializing the simulation appropriately without the HUT is proposed in this contribution. Once the initialization is accomplished a synchronization process is also proposed. The synchronization process depends on the selected method for initialization and therefore both methods need to be compatible. In this contribution, a recommended practice for the initialization of PHIL simulations for synchronous power systems is presented. Experimental validation of the proposed method of establishing a PHIL simulation for a Great Britain network case study demonstrates the effectiveness of the approach in achieving stable operation

Proline derivatives incorporating hydrophobic long-chain derived from natural and synthetic fatty acids

The α-hydrophobic long chain-α-amino esters are prepared by α-hydroxylation of a series of fatty acid esters [derived from oleic acid (OA), linoleic acid (LA), arachidonic acid (ARA) and docosahexaenoic acid (DHA)] followed by Mitsunobu reaction and hydrazinolysis of the phthalimide. These amino esters are mixed with aldehydes and electrophilic alkenes to give very good chemical yields and diastereoselectivities of prolinate derivatives incorporating a hydrophobic long chain at the α-position. This multicomponent 1,3-dipolar cycloaddition (1,3-DC) takes place at room temperature. The synthesis of the homologue hydrophobic chain of OA is performed by its oxidation to aldehyde/racemic N-tert-butylsulfinyl imine/Neff reaction. Final 1,3-DC with benzaldehyde and N-methylmaleimide affords homologue prolinate derivative in good yield.We gratefully acknowledge financial support from the Spanish Ministerio Ministerio de Ciencia, Innovación y Universidades (projects CTQ2013-43446-P and CTQ2014-51912-REDC), the Spanish Ministerio de Economía, Industria y Competitividad, Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER, EU) (projects CTQ2016-76782-P and CTQ2016-81797-REDC), the Generalitat Valenciana (PROMETEOII/2014/017), Medalchemy, S. L. and the University of Alicante. E. S.-M. thanks Medalchemy, S. L./UA for a predoctoral fellowship

Characterization of time delay in power hardware in the loop setups

The testing of complex power components by means of power hardware in the loop (PHIL) requires accurate and stable PHIL platforms. The total time delay typically present within these platforms is commonly acknowledged to be an important factor to be considered due to its impact on accuracy and stability. However, a thorough assessment of the total loop delay in PHIL platforms has not been performed in the literature. Therefore, time delay is typically accounted for as a constant parameter. However, with the detailed analysis of the total loop delay performed in this article, variability in time delay has been detected as a result of the interaction between discrete components. Furthermore, a time delay characterization methodology (which includes variability in time delay) has been proposed. This will allow for performing stability analysis with higher precision as well as to perform accurate compensation of these delays. The implications on stability and accuracy that the time delay variability can introduce in PHIL simulations has also been studied. Finally, with an experimental validation procedure, the presence of the variability and the effectiveness of the proposed characterization approach have been demonstrated

Analysis and adsorption-interaction of amino acids on basaltic mineral subjected to different simulated atmospheres

[EN] The research have been conducted in order to have a better understanding of amino acid adsorption on volcanic matrix surface subjected to different extreme environmental conditions (Martian surface environment, space environment, UV-environment, etc.) simulated by The Planetary Atmosphere and Surfaces Chamber (PASC) at the ”INTA-Centro de Astrobiogia”. The spectroscopic measurements were done by Raman and IR spectroscopy (at the Unidad Asociada Uva-CSIC at Centro de Astrobiología) taking into account the capabilities of the combined Raman-IR analyses for astrobiological target such as the detection of biomarkers on the future ESA-ExoMars Mission. Moreover, SEM-EDX analyses have been conducted in order to complement the spectroscopic results, which endeavour the use of spectroscopic systems for space missions. Conclusion: The L-aspartic acid shows to be the most suitable amino acid for this kind of experiment; the amino acid half–life is 104 seconds according to the reference; both spectroscopic techniques, working in synergy, have detected the amino acid degradation, but amino acid mineral interaction was not detected; the experiments have shown the versatility of the simulation chamber (PASC) to perform experiments under different planetary environments.[ES] Los experimentos se han realizado con el objectivo de tener un mejor entendimiento sobre aminoácidos inmovilizados sobre matrices de caracter volcánico y estos han sido sometidos a diferentes ambientes extremos (Ambiente marciano, ambiente espacial, ambiente de radiación UV, etc.) dentro de la Cámara de Simulación de atmosferas y superficies planetarias (PASC) en el Centro de Astrobiología- INTA. Los métodos espectroscópicos usados son la espectroscopía Raman e Infrarroja (en la Unidad Asociada Uva-CSIC al Centro de Astrobiología) teniendo en cuenta las capacidades combinadas de estos sistemas para objetivos astrobiológicos como la detección de biomarcadores en la futura misión ESAExoMars. Además, se realizaron medidas mediante microscopía electrónica (SEM-EDX) las cuales complementan los resultados espectroscópicos y refuerzan el uso de estos sistemas para misiones espaciales. Conclusiones: El ácido L-Aspartico demostró ser el más eficiente para este tipo de experimentos; la vida media de los aminoácido es de 104 teniendo en cuenta las referencias; ambos sistemas espectroscópicos Raman-IR, trabajando conjuntamente, detectaron la degradación de los aminoácidos, pero la interacción entre aminoácido-mineral no fue detectada; los experimentos demostraron la versatilidad de la Cámara de Simulación (PASC) en cuanto a la realizacion de experimentos en distintos ambientes planetarios.Peer reviewe

Distributed negotiation in future power networks : rapid prototyping using multi-agent system

Technologies like multi-agent system (MAS) have the capability to deal with future power grid requirements such as frequency management and voltage control under a flexible, intelligent and active feature. Based on web of cells (WoC) architecture proposed by European Liaison on Electricity Committed Towards longer-term Research Activity Integrated Research Programme (ELECTRA IRP), a distributed MAS with distributed negotiation ability for future distributed control (including frequency management and voltage control) is proposed. Each cell is designed as an intelligent agent and is investigated in case studies with constraints, where each agent can only communicate with its neighbouring agents. The interaction logic among agents is according to the distributed negotiation algorithm under consideration by the authors. Simulation results indicate that the WoC architecture could negotiate resources in a distributed manner and achieve successful exchange of resources by coordinating distributed agents. Moreover, the prototype reported in this paper can be extended further for future grids' distributed control regimes. The option of MAS to be exploited for the support of the development and integration of novel power system concepts is explored

Transitioning from centralized to distributed control : using SGAM to support a collaborative development of web of cells architecture for real time control

This paper shares some early experiences of developing the Web of Cells (WoC) concept for real time implementation supported by the Smart Grid Architecture Model (SGAM) reference framework. One of the use cases identified for the WoC concept is elaborated upon and is mapped to SGAM, providing one of the first examples where the SGAM reference framework has been used to develop a future distributed control architecture for real time implementation in power systems. Furthermore, this paper offers some insight into the key contributions that this approach can bring, such as a more effective interdisciplinary collaboration, better understanding of the control problem, and its implementation and validation

Caracterización Mineralógica de la Alteración Supergénica de El Jaroso Mediante Espectroscopía Raman

4 figuras, 2 páginas.-- Comunicación presentada a la XXX Reunión de la Sociedad Española de Mineralogía, celebrada en Madrid entre el 13 y 16 de Septiembre de 2010.Peer reviewe