Universidade Federal de Mato Grosso

About: Universidade Federal de Mato Grosso is a education organization based out in Cuiabá, Brazil. It is known for research contribution in the topics: Population & Species richness. The organization has 7748 authors who have published 10181 publications receiving 89994 citations.

Use of Savitzky-Golay Filter for Performances Improvement of SHM Systems Based on Neural Networks and Distributed PZT Sensors.

Abstract: A considerable amount of research has focused on monitoring structural damage using Structural Health Monitoring (SHM) technologies, which has had recent advances. However, it is important to note the challenges and unresolved problems that disqualify currently developed monitoring systems. One of the frontline SHM technologies, the Electromechanical Impedance (EMI) technique, has shown its potential to overcome remaining problems and challenges. Unfortunately, the recently developed neural network algorithms have not shown significant improvements in the accuracy of rate and the required processing time. In order to fill this gap in advanced neural networks used with EMI techniques, this paper proposes an enhanced and reliable strategy for improving the structural damage detection via: (1) Savitzky-Golay (SG) filter, using both first and second derivatives; (2) Probabilistic Neural Network (PNN); and, (3) Simplified Fuzzy ARTMAP Network (SFAN). Those three methods were employed to analyze the EMI data experimentally obtained from an aluminum plate containing three attached PZT (Lead Zirconate Titanate) patches. In this present study, the damage scenarios were simulated by attaching a small metallic nut at three different positions in the aluminum plate. We found that the proposed method achieves a hit rate of more than 83%, which is significantly higher than current state-of-the-art approaches. Furthermore, this approach results in an improvement of 93% when considering the best case scenario.

The use of the U(n,f) reaction dosimetry in the determination of the λf value through fission-track techniques

Abstract: A new set of determinations of the decay constant for spontaneous fission of 238U, λf, using mica–uranium sandwich and thin films of natural uranium is presented. A value of λf=(8.37±0.17)×10−17 a−1 has been determined. The use of uranium-based neutron dosimetry for the measurement of λf through fission-track techniques is discussed. Particularly, the λf measurement by Roberts et al. (Phys. Rev. 174 (1968) 4847), is analyzed, showing that the value obtained by these authors (7.03×10−17 a−1) underestimated λf. It is concluded that the dosimetry based on U(n,f) reaction does not support a λf value around 7×10−17 a−1 determined by various authors using mica–uranium sandwich.

Clinical and sociodemographic profile of adolescents who stayed and did not stay in treatment at CAPSad Cuiabá/MT

Abstract: OBJECTIVE: Compare clinical and sociodemographic profile of adolescents who stayed and did not stay in treatment at Centro de Atencao Psicossocial para Alcool e outras Drogas (CAPSad). METHOD: A transverse study based on medical records of 125 users who had been in treatment at CAPS ad Adolescer in Cuiaba/MT, from June 2009 to June 2011. RESULTS: The permanence in treatment was predominantly male among users who extensively used psychoactive substances, who were sent for this treatment by social and judicial sectors. They had a conflictual family relationship and also had a frequent participation of family in treatment. The biggest proportion of those who did not stay in treatment happened because of the lack of integration with other devices of the network. CONCLUSION: To know the characteristics of the adolescents and the interveners factors in the permanence reinforce the responsibility of CAPS in the effective articulation of the network, and moreover, reassure that family must be more and more close to treatment, as an fundamental part in the project of intervention.

Scarabaeinae dung beetles from Ecuador: a catalog, nomenclatural acts, and distribution records.

Abstract: The Ecuadorian territory is divided into four natural regions: the coastal lowlands, the Andean highlands, the Amazon basin, and the Galapagos Islands. Each of these regions has its own ecosystems and specific vegetation. The purpose of this work is to compile an updated catalog of the Scarabaeinae (Coleoptera: Scarabaeidae) of Ecuador that includes distributional data and several nomenclatural acts. We compiled data from 25 scientific collections, with the examination of 13,550 scarabaeines; additionally, 390 bibliographic references were reviewed for their taxonomic histories. The Scarabaeinae fauna from Ecuador is represented by 33 genera and 223 species, with 45 range-restricted species; 27 species were erroneously recorded from the country. The following nomenclatural acts are made: (A) two new status as valid species: Canthon (Glaphyrocanthon) ohausi Balthasar, 1939, stat. n., and Deltochilum (Calhyboma) arrowi Paulian, 1939 stat. n.; (B) one new synonym: Uroxysmagnus Balthasar, 1940 = Uroxyslatesulcatus Bates, 1891, syn. n.; (C) two revalidated names: Canthidium (Canthidium) orbiculatum (Lucas, 1857) and Dichotomius (Luederwaldtinia) fortepunctatus (Luederwaldt, 1923); and (D) ten lectotypes designated for: Choeridiumorbiculatum Lucas, 1857; Choeridiumcupreum Blanchard, 1846; Canthidiumcoerulescens Balthasar, 1939; Canthonangustatus Harold, 1867; Canthonangustatusohausi Balthasar, 1939; Deltochilumtessellatum Bates, 1870; Pinotusfortepunctatus Luederwaldt, 1923; Pinotusglobulus Felsche, 1901; Uroxyslatesulcatus Bates, 1891; and Uroxysmagnus Balthasar, 1940. The type specimens related to the new nomenclatural acts are illustrated and the maps of the geographical distribution of all species are provided.