245 research outputs found

    Functionality of low digestibility emulsions in cocoa creams : structural changes during in vitro digestion and sensory perception

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    The objective of this work was to evaluate the application of low digestibility oil/water emulsions as fat source in a cocoa cream. Emulsions were composed by water, sunflower oil and cellulose ethers or xanthan gum. Back extrusion assays were measured before and after in vitro digestion and free fatty acids release were measured to evaluate the fat digestibility. Finally consumer acceptability was carried out to determine the degree of liking of each system. The results revealed that all the emulsions confer a suitable consistency to the creams and the structure provided by the hydrocolloids was resistant to digestion, reducing the fat digestibility. However, after gastric digestion only cream with xanthan gum showed a significant increase in consistency what it could be related with an increase in satiety. Regarding the sensory characteristics, the cream elaborated with xanthan gum was rated close to the control cream that received the highest scores

    Effects of a single session of SMR neurofeedback training on anxiety and cortisol levels

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    Objectives: According to some studies, a putatively calming effect of EEG neurofeedback training could be useful as a therapeutic tool in psychiatric practice. With the aim of elucidating this possibility, we tested the efficacy of a single session of ¿sensorimotor (SMR)/¿theta neurofeedback training for mood improvement in 32 healthy men, taking into account trainability, independence and interpretability of the results. Methods: A pre-post design, with the following dependent variables, was applied: (i) psychometric measures of mood with regards to anxiety, depression, and anger (Profile of Mood State, POMS, and State Trait Anxiety Inventory, STAI); (ii) biological measures (salivary levels of cortisol); (iii) neurophysiological measures (EEG frequency band power analysis). In accordance with general recommendations for research in neurofeedback, a control group receiving sham neurofeedback was included. Results: Anxiety levels decreased after the real neurofeedback and increased after the sham neurofeedback (P < 0.01, size effect 0.9 for comparison between groups). Cortisol decreased after the experiment in both groups, though with significantly more pronounced effects in the desired direction after the real neurofeedback (P < 0.04; size effect 0.7). The group receiving real neurofeedback significantly enhanced their SMR band (P < 0.004; size effect 0.88), without changes in the theta band. The group receiving sham neurofeedback did not show any EEG changes. Conclusions: The improvement observed in anxiety was greater in the experimental group than in the sham group, confirmed by both subjective (psychometric) measures and objective (biological) measures. This was demonstrated to be associated with the real neurofeedback, though a nonspecific (placebo) effect likely also contributed

    Vertical Elasticity on Marathon and Chronos Mesos frameworks

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    [EN] Marathon and Chronos are two popular Mesos frameworks that are widely used for deploying fault-tolerant services and periodic batch jobs. Marathon and Chronos provide by design mechanisms for horizontal elasticity, scaling up and down the number of job and service instances. Horizontal elasticity is appropriate when the problems that are solved are inherently parallel. However, when the problem cannot benefit from an increase of the amount of resources, vertical elasticity must be considered. This work implements on top of Marathon and Chronos Mesos frameworks, a mechanism to vary the resources associated to an executor dynamically, according to its progress and considering specific Quality of Service (QoS). The mechanism developed provides a wrapper executable and a service that takes the decision of increasing or decreasing the resources allocated to different Chronos iterations or a long-living Marathon application. The mechanism makes use of checkpointing techniques to preserve the execution of Marathon applications and leverages OpenStack Monasca for the monitoring. \footnote{The work in this article has been funded by projects BIGCLOE and EUBra-BIGSEA, BIGLOE is funded by the Spanish ``Ministerio de Econom\'ia, Industria y Competitividad" with reference number TIN2016-79951-R and EUBra-BIGSEA is funded jointly by the European Commission under the Cooperation Programme, Horizon 2020 grant agreement No 690116 and the Brazilian Ministério de Ciência, Tecnologia e Inovação (MCTI).The work in this article has been funded by projects BIGCLOE and EUBra BIGSEA, BIGLOE is funded by the Spanish "Ministerio de Economia, Industria y Competitividad" with reference number TIN2016-79951-R and EUBra-BIGSEA is funded jointly by the European Commission under the Cooperation Programme, Horizon 2020 grant agreement No 690116 and the Brazilian Ministerio de Ciencia, Tecnologia e Inovacao (MCTI).López-Huguet, S.; Natanael, I.; Brito, A.; Blanquer Espert, I. (2019). Vertical Elasticity on Marathon and Chronos Mesos frameworks. Journal of Parallel and Distributed Computing. 133:179-192. https://doi.org/10.1016/j.jpdc.2019.01.002S17919213

    Experimental assessment of Textile Reinforced Sprayed Mortar strengthening system for brickwork wallettes

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    This work explores the feasibility of strengthening masonry with Textile Reinforced Mortar (TRM) by projecting it to save application time. Nineteen tests on masonry samples strengthened with TRM have been carried out to assess this new application method. Different mortars and fibre grids were considered for studying their influence and applicability with this new technique. Three points bending tests have been performed on the specimens to compare the flexural strength between cases with manually applied mortar (TRM) and sprayed application (TRSM) of the mortar layer. It was noticed that the strengthening mortar has a significant influence on the failure mode. Results show a remarkable (between 2 and 6 times more) productivity increase when using TRSM and a load-bearing capacity rise for the cases with larger grid spacing and projectable mortar when using TRSM instead of TRM. Greater ductility values were also observed for the TRSM cases in comparison with the analogue TRM cases (same grid and mortar). (C) 2013 Elsevier Ltd. All rights reserved.Peer ReviewedPostprint (author’s final draft

    Optical performance of a new design of trifocal intraocular lens based on the Devil's diffractive lens

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    In this work, we propose a new diffractive trifocal intraocular lens design with focus extension, conceived to provide a high visual performance at intermediate distances. This design is based on a fractal structure known as the "Devil's staircase". To assess its optical performance, numerical simulations have been performed with a ray tracing program using the Liou-Brennan model eye under polychromatic illumination. The simulated through the focus visual acuity was the merit function employed to test its pupil-dependence and its behavior against decentering. A qualitative assessment of the multifocal intraocular lens (MIOL) was also performed experimentally with an adaptive optics visual simulator. The experimental results confirm our numerical predictions. We found that our MIOL design has a trifocal profile, which is very robust to decentration and has low degree of pupil dependence. It performs better at intermediate distances than at near distances and, for a pupil diameter of 3 mm, it works like an EDoF lens over almost the entire defocus range

    A Grammatical Approach to the Modeling of an Autonomous Robot

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    Virtual Worlds Generator is a grammatical model that is proposed to define virtual worlds. It integrates the diversity of sensors and interaction devices, multimodality and a virtual simulation system. Its grammar allows the definition and abstraction in symbols strings of the scenes of the virtual world, independently of the hardware that is used to represent the world or to interact with it. A case study is presented to explain how to use the proposed model to formalize a robot navigation system with multimodal perception and a hybrid control scheme of the robot. The result is an instance of the model grammar that implements the robotic system and is independent of the sensing devices used for perception and interaction. As a conclusion the Virtual Worlds Generator adds value in the simulation of virtual worlds since the definition can be done formally and independently of the peculiarities of the supporting devices

    Differences in the Use and Opinions About New eHealth Technologies Among Patients With Psychosis: Structured Questionnaire

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    [EN] Background: Despite a growing interest in the use of technology in order to support the treatment of psychotic disorders, limited knowledge exists about the viability and acceptability of these eHealth interventions in relation to the clinical characteristics of patients. Objective: The objective of this study was to assess the access and use of, as well as experiences and interest in, new technologies using a survey of patients diagnosed with early psychosis compared with a survey of patients diagnosed with chronic psychotic disorders. Methods: We designed a structured questionnaire. This questionnaire was divided into five parts: (1) clinical and demographic information, (2) access and use of the internet, (3) use of the internet in relation to mental health, (4) experiences with technology, and (5) patients¿ interest in eHealth services. In total, 105 patients were recruited from early psychosis units (n=65) and recovery units (n=40). Results: In this study, 84.8% (89/105) of the patients had access to the internet and 88.6% (93/105) owned an electronic internet device. In total, 71.3% (57/80) of patients who owned a mobile phone were interested in eHealth systems and 38.2% (37/97) reported negative experiences related to the internet usage. We observed differences between the groups in terms of device ownership (P=.02), the frequency of internet access (P<.001), the use of social media (P=.01), and seeking health information (P=.04); the differences were found to be higher in the early psychosis group. No differences were found between the groups in terms of the use of internet in relation to mental health, experiences and opinions about the internet, or interest in eHealth interventions (P=.43). Conclusions: The availability and use of technology for the participants in our survey were equivalent to those for the general population. The differences found between the groups in relation to the access or use of technology seemed to due to age-related factors. The use of technology involving mental health and the interest in eHealth interventions were mainly positive and equivalent between the groups. Accordingly, this group of patients is a potential target for the emerging eHealth interventions, regardless of their clinical status. However, 28.7% (23/80) of the studied patients rejected the use of internet interventions and 38.2% (37/97) had unpleasant experiences related to its usage; thus, more in-depth studies are needed to better define the profile of patients with psychosis who may benefit from eHealth treatments.This study was supported by Generalitat Valenciana (PROMETEO/2016/082 grant) and CIBERSAM and Fondo de Investigacion Sanitaria (PI01399, PI13/00447; PI17/00402, Cofunded FEDER).Bonet, L.; Llácer, B.; Hernandez-Viadel, M.; Arce Grilo, AD.; Blanquer Espert, I.; Cañete, C.; Escartí, MJ.... (2018). 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Revista de Psiquiatría y Salud Mental, 10(3), 168-178. doi:10.1016/j.rpsm.2017.01.003World Health Organization2007Global Observatory for eHealth http://www.who.int/goe/en/Bucci, S., Barrowclough, C., Ainsworth, J., Morris, R., Berry, K., Machin, M., … Haddock, G. (2015). Using mobile technology to deliver a cognitive behaviour therapy-informed intervention in early psychosis (Actissist): study protocol for a randomised controlled trial. Trials, 16(1). doi:10.1186/s13063-015-0943-3Schlosser, D., Campellone, T., Kim, D., Truong, B., Vergani, S., Ward, C., & Vinogradov, S. (2016). Feasibility of PRIME: A Cognitive Neuroscience-Informed Mobile App Intervention to Enhance Motivated Behavior and Improve Quality of Life in Recent Onset Schizophrenia. JMIR Research Protocols, 5(2), e77. doi:10.2196/resprot.5450Garety, P. A., Ward, T., Freeman, D., Fowler, D., Emsley, R., Dunn, G., … Hardy, A. (2017). SlowMo, a digital therapy targeting reasoning in paranoia, versus treatment as usual in the treatment of people who fear harm from others: study protocol for a randomised controlled trial. Trials, 18(1). doi:10.1186/s13063-017-2242-7Depp, C. A., Harmell, A. L., Vahia, I. V., & Mausbach, B. T. (2015). Neurocognitive and functional correlates of mobile phone use in middle-aged and older patients with schizophrenia. Aging & Mental Health, 20(1), 29-35. doi:10.1080/13607863.2015.1008987National Alliance on Mental Illness (NAMI)2017-10-10Health and Technology Study 2014https://www.nami.org/About-NAMI/Publications-Reports/Survey-Reports/Health-and-Technology-Study-(2014)SmithAThe Smartphone difference: U.S. Smartphone Use in2015Washington, DCPew Research Centrehttp://www.pewinternet.org/2015/04/01/us-smartphone-use-in-2015Tobitt, S., & Percival, R. (2017). Switched on or switched off? A survey of mobile, computer and Internet use in a community mental health rehabilitation sample. Journal of Mental Health, 28(1), 4-10. doi:10.1080/09638237.2017.1340623Firth, J., Cotter, J., Torous, J., Bucci, S., Firth, J. A., & Yung, A. R. (2015). Mobile Phone Ownership and Endorsement of «mHealth» Among People With Psychosis: A Meta-analysis of Cross-sectional Studies. Schizophrenia Bulletin, 42(2), 448-455. doi:10.1093/schbul/sbv132Thomas, N., Foley, F., Lindblom, K., & Lee, S. (2017). Are people with severe mental illness ready for online interventions? Access and use of the Internet in Australian mental health service users. Australasian Psychiatry, 25(3), 257-261. doi:10.1177/1039856217689913Gitlow, L., Abdelaal, F., Etienne, A., Hensley, J., Krukowski, E., & Toner, M. (2017). Exploring the Current Usage and Preferences for Everyday Technology among People with Serious Mental Illnesses. Occupational Therapy in Mental Health, 33(1), 1-14. doi:10.1080/0164212x.2016.1211061Trefflich, F., Kalckreuth, S., Mergl, R., & Rummel-Kluge, C. (2015). Psychiatric patients׳ internet use corresponds to the internet use of the general public. Psychiatry Research, 226(1), 136-141. doi:10.1016/j.psychres.2014.12.037Gay, K., Torous, J., Joseph, A., Pandya, A., & Duckworth, K. (2016). Digital Technology Use Among Individuals with Schizophrenia: Results of an Online Survey. JMIR Mental Health, 3(2), e15. doi:10.2196/mental.5379Berry, N., Lobban, F., Emsley, R., & Bucci, S. (2016). Acceptability of Interventions Delivered Online and Through Mobile Phones for People Who Experience Severe Mental Health Problems: A Systematic Review. Journal of Medical Internet Research, 18(5), e121. doi:10.2196/jmir.5250Birnbaum, M. L., Rizvi, A. F., Correll, C. U., Kane, J. M., & Confino, J. (2015). Role of social media and the Internet in pathways to care for adolescents and young adults with psychotic disorders and non-psychotic mood disorders. Early Intervention in Psychiatry, 11(4), 290-295. doi:10.1111/eip.12237Ben-Zeev, D., Scherer, E. A., Gottlieb, J. D., Rotondi, A. J., Brunette, M. F., Achtyes, E. D., … Kane, J. M. (2016). mHealth for Schizophrenia: Patient Engagement With a Mobile Phone Intervention Following Hospital Discharge. JMIR Mental Health, 3(3), e34. doi:10.2196/mental.6348Kannisto, K. A., Adams, C. E., Koivunen, M., Katajisto, J., & Va lima ki, M. (2015). Feedback on SMS reminders to encourage adherence among patients taking antipsychotic medication: a cross-sectional survey nested within a randomised trial. BMJ Open, 5(11), e008574-e008574. doi:10.1136/bmjopen-2015-008574Instituto Nacional de EstadísticaEncuesta sobre equipamiento y uso de tecnologías de información y comunicación en los hogares2016 http://www.ine.es/dyngs/INEbase/es/operacion.htm?c=Estadistica_C&cid=1254736176741&menu=ultiDatos&idp=1254735976608Robotham, D., Satkunanathan, S., Doughty, L., & Wykes, T. (2016). Do We Still Have a Digital Divide in Mental Health? A Five-Year Survey Follow-up. 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    Hydraulic transient in residential buildings with a direct pump connection

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    This paper consists of an experimental and numerical study into transient behaviour in a residential building. The analysed effects occur by centrifugal pumps when they start with a direct supply (fixed-speed pumps are connected to the service pipe without an atmospheric tank). Direct supply increases the transient effect and places higher demands on the water main. The properties of such an installation were analysed using a hydraulic model in order to detect the most unfavourable scenario. The results were compared to experimental data. Basic hydraulics demonstrates that a pressure drop occurs during the startup. The magnitude mainly depends on the pump capacity. But, numerical and field results show that other variables related to service pipe design could also negatively affect the pressure surge. The study provides water utilities with information about the influence of the different variables on pressure surge magnitude and basic design criteria to minimize these effects.This work was supported by the Ministerio de Educacion y Ciencia of the Spanish Government under Grant No CGL2005-03666.Soriano Olivares, J.; Arregui De La Cruz, F.; Espert Alemany, VB.; García-Serra García, J. (2014). Hydraulic transient in residential buildings with a direct pump connection. Urban Water Journal. 2014:1-13. https://doi.org/10.1080/1573062X.2014.989860S1132014Basupi, I., Kapelan, Z., & Butler, D. (2013). Reducing life-cycle carbon footprint in the (re)design of water distribution systems using water demand management interventions. Urban Water Journal, 11(2), 91-107. doi:10.1080/1573062x.2012.750374Bergant, A., Tijsseling, A. S., Vítkovský, J. P., Covas, D. I. C., Simpson, A. R., & Lambert, M. F. (2008). 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Urban Water Journal, 6(6), 407-415. doi:10.1080/15730620903038461Covas, D., Stoianov, I., Ramos, H., Graham, N., Maksimović, Č., & Butler, D. (2004). Water hammer in pressurized polyethylene pipes: conceptual model and experimental analysis. Urban Water Journal, 1(2), 177-197. doi:10.1080/15730620412331289977Criminisi, A., Fontanazza, C. M., Freni, G., & Loggia, G. L. (2009). Evaluation of the apparent losses caused by water meter under-registration in intermittent water supply. Water Science and Technology, 60(9), 2373-2382. doi:10.2166/wst.2009.423Davis, A. (2004). Hydraulic transients in transmission and distribution systems. Urban Water Journal, 1(2), 157-166. doi:10.1080/15730620412331289968De Marchis, M., Fontanazza, C. M., Freni, G., La Loggia, G., Napoli, E., & Notaro, V. (2010). A model of the filling process of an intermittent distribution network. Urban Water Journal, 7(6), 321-333. doi:10.1080/1573062x.2010.519776Fontanazza, C. M., Notaro, V., Puleo, V., & Freni, G. 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Allocating the cost of the carbon footprint produced along a supply chain, among the stakeholders involved. Journal of Water and Climate Change, 5(4), 556-568. doi:10.2166/wcc.2014.101Kanakoudis, V., & Tsitsifli, S. (2010). Results of an urban water distribution network performance evaluation attempt in Greece. Urban Water Journal, 7(5), 267-285. doi:10.1080/1573062x.2010.509436Kirmeyer, G.J., Richards, W., and Dery-Smith, C., 1994. An assessment of water distribution systems and associated needs.Report of the American Water Work. Denver, CO: Association Research Foundation.Kitis, M., Yigita, N. O., Harmana, B. I., Muhammetoglu, H., Muhammetoglu, A., Karadirek, I. E., … Palancic, I. (2010). Occurrence of Trihalomethanes in Chlorinated Groundwaters with Very Low Natural Organic Matter and Bromide Concentrations. Environmental Forensics, 11(3), 264-274. doi:10.1080/15275922.2010.495935Levesque, S., Rodriguez, M. J., Serodes, J., Beaulieu, C., & Proulx, F. (2006). 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    Jute/polypropylene composites: Effect of enzymatic modification on thermo-mechanical and dynamic mechanical properties

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    In this study, a high-performance composite was prepared from jute fabrics and polypropylene (PP). In order to improve the compatibility of the polar fibers and the non-polar matrix, alkyl gallates with different hydrophobic groups were enzymatically grafted onto jute fabric by laccase to increase the surface hydrophobicity of the fiber. The grafting products were characterized by FTIR. The results of contact angle and wetting time showed that the hydrophobicity of the jute fabrics was improved after the surface modification. The effect of the enzymatic graft modification on the properties of the jute/PP composites was evaluated. Results showed that after the modification, tensile and dynamic mechanical properties of composites improved, and water absorption and thickness swelling clearly decreased. However, tensile properties drastically decreased after a long period of water immersion. The thermal behavior of the composites was evaluated by TGA/DTG. The fiber-matrix morphology in the modified jute/PP composites was confirmed by SEM analysis of the tensile fractured specimens.This work was financially supported by the National Natural Science Foundation of China (51173071), the Program for New Century Excellent Talents in University (NCET-12-0883), the Program for Changjiang Scholars and Innovative Research Team in University (IRT1135) and the Fundamental Research Funds for the Central Universities (JUSRP51312B, JUSRP51505)
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