Cognitive behaviour analysis based on facial information using depth sensors

Cognitive behaviour analysis is considered of high impor- tance with many innovative applications in a range of sectors including healthcare, education, robotics and entertainment. In healthcare, cogni- tive and emotional behaviour analysis helps to improve the quality of life of patients and their families. Amongst all the different approaches for cognitive behaviour analysis, significant work has been focused on emo- tion analysis through facial expressions using depth and EEG data. Our work introduces an emotion recognition approach using facial expres- sions based on depth data and landmarks. A novel dataset was created that triggers emotions from long or short term memories. This work uses novel features based on a non-linear dimensionality reduction, t-SNE, applied on facial landmarks and depth data. Its performance was eval- uated in a comparative study, proving that our approach outperforms other state-of-the-art features

Biopesticide activity from drimanic compounds to control tomato pathogens

Indexación: Scopus.Tomato crops can be affected by several infectious diseases produced by bacteria, fungi, and oomycetes. Four phytopathogens are of special concern because of the major economic losses they generate worldwide in tomato production; Clavibacter michiganensis subsp. michiganensis and Pseudomonas syringae pv. tomato, causative agents behind two highly destructive diseases, bacterial canker and bacterial speck, respectively; fungus Fusarium oxysporum f. sp. lycopersici that causes Fusarium Wilt, which strongly affects tomato crops; and finally, Phytophthora spp., which affect both potato and tomato crops. Polygodial (1), drimenol (2), isonordrimenone (3), and nordrimenone (4) were studied against these four phytopathogenic microorganisms. Among them, compound 1, obtained from Drimys winteri Forst, and synthetic compound 4 are shown here to have potent activity. Most promisingly, the results showed that compounds 1 and 4 affect Clavibacter michiganensis growth at minimal inhibitory concentrations (MIC) values of 16 and 32 μg/mL, respectively, and high antimycotic activity against Fusarium oxysporum and Phytophthora spp. with MIC of 64 μg/mL. The results of the present study suggest novel treatment alternatives with drimane compounds against bacterial and fungal plant pathogens. © 2018 by the authors.https://www.mdpi.com/1420-3049/23/8/205

Estudo Comparativo Da Evapotranspiração De Referência Entre Localidades No Estado De São Paulo E Na Província De Habana

FAO proposed the reference evapotranspiration to compare evapotranspiration in different areas, because most equations employed in estimating evapotranspiration are empirical and limited to be used in local and climates similar to those in which they were determined. The objective of this study was to analyze the difference in calculated values of ETo for Botucatu and Piracicaba (Brazil) and Güira Melena (Cuba), based on 30-year data. Seasonal differences between years and locations were assessed and subsequently the influence of local climates on these ETo values differences. Climatic elements maximum (Tmax) and minimum temperature (Tmin), relative humidity (RH), wind speed at 2 m height (U2) and solar radiation (n) were obtained from conventional meteorological stations. Evapotranspiration values in Cuba were higher during summer months in the Northern Hemisphere. The highest evapotranspiration values in Botucatu and Piracicaba occurred in summer months in the Southern Hemisphere. Correlation exists between the three locations with the same distance between them. It was concluded from the methodology used that the three localities have different evapotranspiration values and despite being in different hemispheres the evapotranspiration among Piracicaba and Güira Melena are closer than the one verified between Botucatu and Piracicaba. © 2016, Universidade Estadual Paulista - UNESP. All rights reserved.21238439

Global well-posedness for a coupled modified kdv system

We prove the sharp global well-posedness result for the initial value problem (IVP) associated to the system of the modi ed Korteweg-de Vries (mKdV) equation. For the single mKdV equation such result has been obtained by using Mirura's Transform that takes the KdV equation to the mKdV equation [8]. We do not know the existence of Miura's Transform that takes a KdV system to the system we are considering. To overcome this di culty we developed a new proof of the sharp global well-posedness result for the single mKdV equation without using Miura's Transform. We could successfully apply this technique in the case of the mKdV system to obtain the desired result.Fundação para a Ciência e a Tecnologia (FCT

Mapping density, diversity and species-richness of the Amazon tree flora

Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped tree species-diversity and tree species-richness at 0.1-degree resolution, and investigated drivers for diversity and richness. Using only location, stratified by forest type, as predictor, our spatial model, to the best of our knowledge, provides the most accurate map of tree diversity in Amazonia to date, explaining approximately 70% of the tree diversity and species-richness. Large soil-forest combinations determine a significant percentage of the variation in tree species-richness and tree alpha-diversity in Amazonian forest-plots. We suggest that the size and fragmentation of these systems drive their large-scale diversity patterns and hence local diversity. A model not using location but cumulative water deficit, tree density, and temperature seasonality explains 47% of the tree species-richness in the terra-firme forest in Amazonia. Over large areas across Amazonia, residuals of this relationship are small and poorly spatially structured, suggesting that much of the residual variation may be local. The Guyana Shield area has consistently negative residuals, showing that this area has lower tree species-richness than expected by our models. We provide extensive plot meta-data, including tree density, tree alpha-diversity and tree species-richness results and gridded maps at 0.1-degree resolution

Phenomenological Characterization Of Photoactive Centers In Undoped Bi 12tio20 Crystals Using Optical And Electrical Techniques

We report optical and electrical measurements contributing for a better characterization of the relevant photoactive center levels in undoped photorefractive Bi12TiO20 (BTO) crystals grown in Brazil. A center responsible for photochromism was identified at about 0.42eV, probably below the conduction band (CB). Two other defect, centers were clearly identified at 0.17 eV and at 0.60 eV. Different centers between 1.0 and 0.85, probably above the valence band (VB), were mesured using different techniques which probably correspond to the same electron-acceptor defect responsible for dark p-conductivity which was already reported in the literature. Classical photoconductivity experiments indicated electron-donor centers at least at about 2.2 and 2.5 eV. Holographic techniques indicated the presence of at least two photoactive centers closer than 1.6 eV from CB, one of which could be an empty one.99221227Grabmaier, B., Oberschraid, R., Properties of pure and doped Bi12GeO20 and Bi 12SiO20 crystals (1986) Phys. Stat. Sol., 96, pp. 199-211Kamshilin, A.A., Petrov, M.P., Continuous reconstruction of holographic interferograms through anisotropic diffraction in photorefractive crystals (1985) Opt. Commun., 53, pp. 23-26Mallick, S., Rouède, D., Influence of the polarization direction on the two-beam coupling in photorefractive Bi12SiO20: Diffusion regime (1987) Appl. Phys. B, 43, pp. 239-245Mosquera, L., De Oliveira, I., Frejlich, J., Hernandes, A., Lanfredi, S., Carvalho, J., Dark conductivity, photoconductivity and light-induced absorption in photorefractive sillenite crystals (2001) J. Appl. Phys., 90, pp. 2635-2641Marinova, V., Lin, S., Sainov, V., Gospodinov, M., Hsu, K., Light-induced properties of Ru-doped Bi12TiO20 crystals (2003) J. Opt. A: Pure Appl. Opt., 5, pp. S500-S506Odoulov, S.G., Shcherbin, K.V., Shumeljuk, A.N., Photorefractive recording in BTO in the near infrared (1994) J. Opt. Soc. Am. B, 11, pp. 1780-1785Dos Santos, T., Carvalho, J., Hernandes, A., Synthesis and crystal growth of sillenite phases in the Bi 2O3-TiO2-Nb2O5 system (2004) Crys. Res. Technol., 39, pp. 868-872Buse, K., Light-induced charge transport processes in photorefractive crystals I: Models and experimental methods (1997) Appl. Phys. B, 64, pp. 273-291Aldrich, R., Hou, S., Harvill, M., Electrical and optical properties of Bi12SiO20 (1971) J. Appl. Phys., 42, pp. 493-494Baquedano, J.A., Contreras, L., Diéguez, E., Cabrera, J., Spectral dependence of photorefractive erasure in Bi12GeO 20 and Bi12SiO20 (1989) J. Appl. Phys., 66, pp. 5146-5150Delboulbe, A., Fromont, C., Herriau, J., Mallick, S., Huignard, J., Quasi-nondestructive readout of holographically stores information in photorefractive Bi12SiO20 crystals (1989) Appl. Phys. Lett., 55, pp. 713-715Riehermann, S., Rickermann, F., Volkov, V., Egorysheva, A., Von Bally, A.G., Optical and photorefractive characterization of BTO crystals doped with Cd, Ca, Ga and v (1997) J. Nonlinear Opt. Phys. and Materials, 6, pp. 235-249Longeaud, C., Kleider, J., General analysis of the modulated-photocurrent experiment including the contributions of holes and electrons (1992) Phys. Rev. B, 45, pp. 11672-11684Longeaud, C., Kleider, J., Kaminski, P., Koslowski, R., Pawlowski, M., Cwirko, R., Investigation of defect levels in semi-insulating materials by modulated and transient photocurrent: Comparison of methods (1999) Semiconductor Science Technology, 14, p. 74

Phenomenological characterization of photoactive centers in Bi12TiO20 crystals using optical and electrical techniques

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Phenomenological Characterization Of Photoactive Centers In Undoped Bi12tio20 Crystals Using Optical And Electrical Techniques

We report optical and electrical measurements contributing for a better characterization of the relevant photoactive center levels in undoped photorefractive Bi12TiO20 (BTO) crystals grown in Brazil. A center responsible for photochromism was identified at about 0.42eV, probably below the conduction band (CB). Two other defect centers were clearly identified at 0.17 eV and at 0.60 eV. Different centers between 1.0 and 0.85, probably above the valence band (VB), were mesured using different techniques which probably correspond to the same electron-acceptor de{reversed not sign}fect responsible for dark p-conductivity which was already reported in the literature. Classical photoconductivity experiments indicated electron-donor centers at least at about 2.2 and 2.5 eV. Holographic techniques indicated the presence of at least two photoactive centers closer than 1.6 eV from CB, one of which could be an empty one. © 2005 OSA/PEMD 2005.221227Grabmaier, B., Oberschmid, R., Properties of Pure and Doped Bi12GeO20 and Bi12SiO20 Crys{reversed not sign}tals. (1986) Phys. Stat. Sol, 96, pp. 199-211Kamshilin, A.A., Petrov, M.P., Continuous reconstruction of holographic interferograms through anisotropic diffraction in photorefractive crystals (1985) Opt. Commun, 53, pp. 23-26Mallick, S., Rouede, D., Influence of the polarization Direction on the Two-Beam Coupling in Photorefractive Bii2SiO20: Diffusion Regime (1987) Appl. Phys. B, 43, pp. 239-245Mosquera, L., de Oliveira, I., Frejlich, J., Hernandes, A., Lanfredi, S., Carvalho, J., Dark conductivity, photoconductivity and light-induced absorption in photorefractive sillenite crystals. (2001) J. Appl. Phys, 90, pp. 2635-2641Marinova, V., Lin, S., Sainov, V., Gospodinov, M., Hsu, K., Light-induced properties of Ru-doped Bii2TiO20 crystals (2003) J. Opt. A: Pure Appl. Opt, 5, pp. S500-S506Odoulov, S.G., Shcherbin, K.V., Shumeljuk, A.N., Photorefractive recording in BTO in the near infrared (1994) J. Opt. Soc. Am. B, 11, pp. 1780-1785Dos Santos, T., Carvalho, J., Hernandes, A., Synthesis and crystal growth of sillenite phases in the Bi203-Ti02-Nb205 system (2004) Crys. Res. Technol, 39, pp. 868-872Buse, K., Light-induced charge transport processes in photorefractive crystals I: Models and experi{reversed not sign}mental methods (1997) Appl. Phys. B, 64, pp. 273-291Aldrich, R., Hou, S., Harvill, M., Electrical and Optical Properties of Bi12Si02o (1971) J-Appl. Phys, 42, pp. 493-494Baquedano, J.A., Contreras, L., Dieguez, E., Cabrera, J., Spectral dependence of photorefractive erasure in Bi12Ge02o and Bi12Si02o (1989) J-Appl. Phys, 66, pp. 5146-5150Delboulbe, A., Fromont, C., Herriau, J., Mallick, S., Huignard, J., Quasi-nondestructive readout of holographically stores information in photorefractive Bi12Si02o crystals (1989) Appl. Phys. Lett, 55, pp. 713-715Riehemann, S., Rickermann, F., Volkov, V., Egorysheva, A., von Bally, G., Optical and photore{reversed not sign}fractive characterization of BTO crystals doped with Cd, Ca, Ga and V. (1997) J. Nonlinear Opt. Phys. and Materials, 6, pp. 235-249Longeaud, C., Kleider, J., General analysis of the modulated-photocurrent experiment including the contributions of holes and electrons (1992) Phys. Rev. B, 45, pp. 11672-11684Longeaud, C., Kleider, J., Kaminski, P., Koslowski, R., Pawlowski, M., Cwirko, R., Investigation of defect levels in semi-insulating materials by modulated and transient photocurrent: comparison of methods (1999) Semiconductor Science Technology, 14, p. 74