303 research outputs found

    Remot robot control from docker

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    Currently, we witness a new phase of digitization which is fueled by the development of Internet-connected smart sensors (Internet of Things - IoT). Also, about the processing of large data volumes that they create using Big Data analytics, leveraging the compute resources from the Cloud and Edge-based systems. For data exchange in the IoT world, typically lightweight communication protocols such as Message Queuing Telemetry Transport (MQTT) are used which are based on publisher/subscriber communication pattern where a broker mediates data among interested parties. In order to provide reliable communication, MQTT provides different Quality of Service (QoS) mechanisms. MQTT publishers, subscribers and brokers can be deployed inside containers on virtualized infrastructure to facilitate large-scale virtualized compute frameworks from the cloud for scalable data analytics. However, each docker containers requires a specific amount of resources to provide the required response time. In this thesis, we evaluate the impact of resource sharing due to the virtualized deployment of MQTT components on latency and response time of IoT applications. We deploy a testbed of Arduino and Raspberry Pi devices that host MQTT clients to pull sensor data towards MQTT clients inside the cloud. We also evaluate the impact of different QoS levels at the MQTT protocol on latency. Our results indicate that proper resource allocation and QoS parametrization is important for maintaining low and stable latency.Outgoin

    Treatment options for reclaiming wastewater produced by the pesticide industry

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    The pesticide production industry generates a high strength wastewater containing a range of toxic pollutants (2,4-dichlorphenoxy acetic acid: 2,4-D; 4-(2,4-dichlorphenox) propionic acid: 2,4-DP; 4-(2,4-dichlorophenox) butyric acid: 2,4-DB; 2,4-dichlorophenol: 2,4-DCP; 2,4,6-trichlorophenol: 2,4,6-TCP; 4-chlororthocresol: PCOC; 4-chloro-2-methyl phenoxyacetic acid: MCPA, 4-(4-chloro-2-methylphenoxy) butyric acid: MCPB and 2-(4-chloro-2-methylphenoxy) propionic acid: MCPP). These pesticides can enter the natural environment and water sources if not removed in a wastewater treatment plant. Treated effluents are regulated by legislation such as the Water Framework Directive (WFD). Most studies found in literature focused on synthetic solutions, synthetic wastewater, at lab-scale or pilot-scale. Although these studies can provide information on the removal mechanisms and provide a comparison between process efficiency, they have limited practical applicability. The process that has been more widely used to treat high strength wastewaters rich in recalcitrant compounds at full-scale, is the combination of biological/granular activated carbon and granular activated carbon/biological processes. The pesticide production wastewater contains a variety of compounds, that can be removed by 80-90% using biological processes (such as membrane bioreactors) and granular activated carbon has been shown to selectively remove the pesticides, potentially creating a high quality effluent. Nevertheless, in order to assert processes design, efficiencies or costs, it is crucial to evaluate these processes experimentally

    Enseñanza del mundo vegetal en 1º de Bachillerato

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    El presente Trabajo de Fin de Máster presenta y desarrolla un proyecto didáctico para la asignatura de Biología, Geología y Ciencias Ambientales de primero de Bachillerato. El proyecto titulado “La ciencia de las plantas” tiene como objetivo principal enseñar el mundo vegetal de una forma práctica, motivadora y de forma integrada a través del currículo de la asignatura. Para que, de esta manera, el alumnado pueda apreciar la importancia de las plantas en el funcionamiento y mantenimiento de la vida. A través del desarrollo de cuatro situaciones de aprendizaje diferentes, se trabajarán diversos aspectos de las plantas desde diferentes perspectivas: la evolución, la fisiología vegetal, los ecosistemas y la sostenibilidad; todas ellas englobadas en el contexto del proyecto didáctico de “La ciencia de las plantas”. Se espera que su puesta en práctica ayude a la comprensión del mundo vegetal desde un punto de vista integrado y no de forma aislada, para asegurar un aprendizaje significativo, que el alumnado pueda integrar en sus conocimientos, pueda aplicarlo en la comprensión de su entorno vital, para ser más conscientes de su importancia y trabajar para su conservación y la consecución de un futuro sostenible.This Master’s thesis presents and develops a didactic project for the subject Biology, Geology and Environmental Sciences in the first year of the baccalaureate. The main objective of the project entitled "The science of plants" is to teach the world of plants in a practical, motivating and integrated way. In this context students could appreciate the importance of plants in the functioning and maintenance of life. Through the development of four different learning situations, various aspects of plants will be worked on from different perspectives: evolution, plant physiology, ecosystems and sustainability; all of them encompassed in the context of the didactic project "The science of plants". It is hoped that the project will help students to understand the plant world from an integrated point of view to ensure meaningful learning which students can integrate into their knowledge and apply it to their understanding of their living environment, to be more aware of its importance and to work for its conservation and the achievement of a sustainable future. Key words: Plants, plant world, evolution, adaptations, plant physiology, ecosystems, sustainability, didactic project, active learning.Departamento de Bioquímica y Biología Molecular y FisiologíaMáster en Profesor de Educación Secundaria Obligatoria y Bachillerato, Formación Profesional y Enseñanzas de Idioma

    Olfactory function in focal epilepsies: Understanding mesial temporal lobe epilepsy beyond the hippocampus

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    Several lines of research have linked olfactory regions with the pathophysiology of focal epilepsies. Among those regions, the piriform cortex represents the major part of the primary olfactory cortex. According to these data, we raised the hypothesis that in patients with mesial temporal lobe epilepsy associated with hippocampal sclerosis exists an interictal dysfunction of olfactory processing that could be more significant compared to patients with extra‐hippocampal focal epilepsy and healthy controls. This could be the consequence of a dysfunctional epileptogenic network that extends beyond the hippocampus and affects other structures, including the piriform cortex. To test this hypothesis, we evaluated the olfactory function with the Sniffin' Sticks test in 32 patients with mesial temporal lobe epilepsy associated with hippocampal sclerosis, 30 patients with extra‐hippocampal focal epilepsy, and 22 healthy controls. Compared to the other study groups, patients with temporal lobe epilepsy due to hippocampal sclerosis showed a basal olfactory dysfunction characterized by an impairment in odor discrimination and odor identification. We also found that high seizure frequency had a strong correlation with the evaluated olfactory tasks. Our results are consistent with neuroimaging and neuropathological data that establish a link between olfactory regions and the pathophysiology of temporal lobe epileps

    Selective arterial embolization for a high-flow priapism following perineal trauma in a young gymnast

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    Introduction. High-flow priapism is a rare condition in children, usually due to a perineal trauma. Materials and methods. We present a case of traumatic highflow priapism investigated by Doppler ultrasound and managed by angiography and selective embolization of a branch of the internal pudendal artery. Results. A 13-year-old gymnast underwent perineal trauma during training and developed a high-flow priapism. The first ultrasound (immediately after the trauma) showed the presence of an inhomogeneous area of 3 x 2 cm associated with an anechoic vascularized area (pseudoaneurysm) in the right corpus cavernosum. On the left side there was a similar finding, but of smaller size. After 3 weeks the pseudoaneurysm on the left was completely obliterated while the right one was still present. Angiography and superselective catheterization of a branch of the left pudendal artery and its embolization with microspheres and with metal microcoils were performed. After the procedure, ultrasound showed that the right pseudoaneurysm was completely obliterated and there were no more branches reaching it. The cavernous arteries were both pervious. Conclusions. Selective arterial embolization is a safe treatment that can also be used in pediatric patients

    Identification of cellulose ethers in cultural heritage by means of MALDI-TOF-MS

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    Cellulose ethers used as adhesives in heritage conservation treatments have been successfully identified by means of MALDI-TOF-MS, a technique non-previously applied for this purpose in cultural assets. This is of relevant importance for long-term conservation, as discrimination among the diverse types of cellulose ethers that may have been applied to an asset during conservation treatments is essential in order to guarantee stability of artworks. The proposed method also allows discrimination among these adhesives spread on paper-based artworks, where cellulose ethers have been extensively utilized for many years, overcoming interferences usually occurred due to the cellulosic nature of both adhesive and support. Successful results have been obtained from mock-ups and small samples of paper-based original artworks with usual low concentrations of adhesive. FTIR and NMR have been used as complementary analytical techniques

    Negative feedback and transcriptional overshooting in a regulatory network for horizontal gene transfer

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    This is an open-access article distributed under the terms of the Creative Commons Attribution License.Horizontal gene transfer (HGT) is a major force driving bacterial evolution. Because of their ability to cross inter-species barriers, bacterial plasmids are essential agents for HGT. This ability, however, poses specific requisites on plasmid physiology, in particular the need to overcome a multilevel selection process with opposing demands. We analyzed the transcriptional network of plasmid R388, one of the most promiscuous plasmids in Proteobacteria. Transcriptional analysis by fluorescence expression profiling and quantitative PCR revealed a regulatory network controlled by six transcriptional repressors. The regulatory network relied on strong promoters, which were tightly repressed in negative feedback loops. Computational simulations and theoretical analysis indicated that this architecture would show a transcriptional burst after plasmid conjugation, linking the magnitude of the feedback gain with the intensity of the transcriptional burst. Experimental analysis showed that transcriptional overshooting occurred when the plasmid invaded a new population of susceptible cells. We propose that transcriptional overshooting allows genome rebooting after horizontal gene transfer, and might have an adaptive role in overcoming the opposing demands of multilevel selection.Work was financed by the Spanish Ministry of Economy and Competitivity (BFU2011–26608) and the European Seventh Framework Program (289326/FP7-KBBE-2011-5 and 282004/FP7–HEALTH-2011-2.3.1–2) to FdlC.Peer Reviewe

    Time-varying effective connectivity during visual object naming as a function of semantic demands

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    Accumulating evidence suggests that visual object understanding involves a rapid feedforward sweep, after which subsequent recurrent interactions are necessary. The extent to which recurrence plays a critical role in object processing remains to be determined. Recent studies have demonstrated that recurrent processing is modulated by increasing semantic demands. Differentially from previous studies, we used dynamic causal modeling to model neural activity recorded with magnetoencephalography while 14 healthy humans named two sets of visual objects that differed in the degree of semantic accessing demands, operationalized in terms of the values of basic psycholinguistic variables associated with the presented objects (age of acquisition, frequency, and familiarity). This approach allowed us to estimate the directionality of the causal interactions among brain regions and their associated connectivity strengths. Furthermore, to understand the dynamic nature of connectivity (i.e., the chronnectome; Calhoun et al., 2014) we explored the time-dependent changes of effective connectivity during a period (200–400 ms) where adding semantic-feature information improves modeling and classifying visual objects, at 50 ms increments. First, we observed a graded involvement of backward connections, that became active beyond 200 ms. Second, we found that semantic demands caused a suppressive effect in the backward connection from inferior frontal cortex (IFC) to occipitotemporal cortex over time. These results complement those from previous studies underscoring the role of IFC as a common source of top-down modulation, which drives recurrent interactions with more posterior regions during visual object recognition. Crucially, our study revealed the inhibitory modulation of this interaction in situations that place greater demands on the conceptual system
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