MONODOMINANCE CHARACTERIZATION OF AROEIRA ( Myracrodruon urundeuva Fr. All.) IN THE CITY OF TUMIRITINGA, MINAS GERAIS STATE

A esp\ue9cie florestal Myracrodruon urundeuva Fr. All. \ue9 reconhecida cientificamente pelo conjunto de caracter\uedsticas ecol\uf3gicas e utilit\ue1rias que a caracterizam como esp\ue9cie \u201cnobre\u201d da flora brasileira. Embora a esp\ue9cie figure desde 1992 at\ue9 o presente na lista de esp\ue9cies da flora brasileira amea\ue7adas de extin\ue7\ue3o, a mesma manifesta comportamento monodominante em algumas regi\uf5es do estado de Minas Gerais, sobretudo na regi\ue3o do m\ue9dio Rio Doce. Diversos estudos s\ue3o conduzidos no intuito de descrever e compreender florestas tropicais monodominadas, no entanto, ainda s\ue3o poucas as informa\ue7\uf5es que esclarecem a estrutura de fragmentos florestais monodominados por Myracrodruon urundeuva. Neste contexto, o presente estudo teve por objetivos: a) caracterizar atrav\ue9s de par\ue2metros flor\uedsticos, fitossociol\uf3gicos e param\ue9tricos a monodomin\ue2ncia de Myracrodruon urundeuva no munic\uedpio de Tumiritinga-MG; b) estimar os estoques de biomassa e carbono a\ue9reos nestes sistemas; c) caracterizar o est\ue1gio de regenera\ue7\ue3o de fragmentos florestais monodominados por aroeira em Tumiritinga-MG, com base na resolu\ue7\ue3o 392 do CONAMA; d) avaliar a exist\ueancia de correla\ue7\ue3o entre cobertura de copa e est\ue1gio de regenera\ue7\ue3o em fragmentos monodominados por aroeira. Foram amostradas de forma aleat\uf3ria 16 parcelas de 400 m\ub2 em todo o munic\uedpio de Tumiritinga, representando 6.400 m\ub2 de \u201caroeirais\u201d. A an\ue1lise de diversidade dos fragmentos monodominados estudados apresentou \uedndice de Shannon-Weaver igual a 0,25. Myracrodruon urundeuva representou 96% dos 678 fustes amostrados, 96% da \ue1rea basal total mensurada e 96% do volume total estimado nas parcelas de invent\ue1rio. Al\ue9m da esp\ue9cie Myracrodruon urundeuva, o estudo de flor\uedstica apresentou somente outras 10 esp\ue9cies florestais representadas por 7 fam\uedlias bot\ue2nicas. As estimativas de biomassa alcan\ue7aram valores m\ue9dios de 81 m3.ha-1 de volume de madeira, 62,8 Mg B.ha-1, 35,2 Mg C.ha-1 e 129,1 Mg CO2.ha-1. Os povoamentos monodominados por aroeira em Tumiritinga foram caracterizados de acordo com a resolu\ue7\ue3o CONAMA 392 e com a an\ue1lise de cobertura de copa como em est\ue1gio m\ue9dio de regenera\ue7\ue3o. A aroeira encontra-se em monodomin\ue2ncia na regi\ue3o do m\ue9dio Rio Doce e se faz necess\ue1ria a realiza\ue7\ue3o de estudos visando ao manejo sustent\ue1vel destas florestas.Myracrodruon urundeuva Fr.All. forest species is scientifically recognized by the set of ecological and utilitarian features that characterize it as a \u201cnoble\u201d species of the Brazilian flora. Although the species has appeared since 1992, until the present dayit has been in the list of species of the endangered Brazilian flora, the same behavior manifests monodominant behavior in some regions of Minas Gerais state, especially in the central Rio Doce area. Many studies have been conducted in order to describe and understand monodominated tropical forests. However, there is not so much information that clarifies the structure of forest fragments mono-dominated by Myracrodruon urundeuva. In this context, this study aimed to: a) characterize parameters through floristic, phytosociological and parametric to the monodominance of Myracrodruon urundeuvain in the city of Tumiritinga, MG; b) estimate the biomass and carbon stocks accumulated in these environments; c) characterize the stage of regeneration of forest fragments monodominated by aroeira in Tumiritinga, in MG state based on the resolution 392 from CONAMA; d) evaluate the correlation between canopy cover and stage of regeneration in fragmentes mono-dominated by aroeira. We randomly sampled 16 plots of 400 m\ub2 around the city of Tumiritinga, representing 6.400m\ub2 of \u201cAroeirais\u201d that were sampled. The diversity analysis of the mono-dominated fragments that were studied showed Shannon-Weaver index equal to 0.25. Myracrodruon urundeuva represented 96% of the 678 sampled individuals, 96% of total basal area measured and 96% of the total volume stored in the inventory plots. In addition to the species Myracrodruon urundeuva, the floristic study showed only 10 other forest species representing even plant families. The estimates of aroeira biomass reached the average value of 81 m3.ha-1 of wood volume, 62.8 MgB.Ha-1, 35.2 MgC.ha-1 and 129.1 MgCO2.ha-1. The fragments mono-dominated by aroeira in Tumiritinga were characterized according to CONAMA 392 and the coverage analysis canopy as in the intermediate stage of regeneration. The aroeirais are monodominant in the region of the central Rio Doce area and it is necessary to carry out studies aiming to carry out the sustainable management of these fragments

Factores psicosociales y afrontamiento del estrés laboral en docentes universitarios, una revisión sistemática

This systematic review study analyzed the repercussions of psychosocial factors for coping with work-related stress in university teachers. The PRISMA-NMA statement (Preferred Reporting Items for Systematic reviews and Meta-Analyses) was used on the Dialnet, SciELO and Redib databases with a sample size of 5417 teachers. Results: 48% presented elevated dissatisfaction in detrimental working conditions, 36% displayed cognitive dysfunction, 12.3% resigned citing Burnout Syndrome and 3.7% presented self-care, self-control, and positive reassessment and sought out support.El presente estudio de revisión sistemática analizó el impacto y las consecuencias de los factores psicosociales para el afrontamiento del estrés laboral de docentes universitarios. Se utilizó la declaración PRISMA-NMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) sobre las bases científicas Dialnet, SciELO y Redib. La población de análisis fue de 5417 docentes de diferentes áreas. Resultados: El 48% presentó altos índices de insatisfacción en perjudiciales condiciones laborales, el 36% evidenció disfuncionalidad cognitiva, el 12,3 % abandonaron sus puestos por Síndrome de Burnout y el 3,7% presentaron estrategias de afrontamiento de autocuidado, autocontrol, reevaluación positiva y búsqueda de apoyo

ARBUSCULAR AND ECTOMYCORRIZAL FUNGI IN EUCALYPT CULTIVATION AND GRASSLAND SANDY SOIL

O Eucalyptus grandis W. Hill ex Maiden forma associa\ue7\uf5es simbi\uf3ticas com fungos micorr\uedzicos arbusculares e ectomicorr\uedzicos. O objetivo do trabalho foi avaliar a popula\ue7\ue3o (direta e indireta) e a diversidade desses microorganismos nessa esp\ue9cie florestal em \ue1reas sujeitas \ue0 areniza\ue7\ue3o em S\ue3o Francisco de Assis, RS. Amostras de solo e ra\uedzes de tr\ue9s \ue1rea - campo nativo, cultivo de eucalipto 3 anos e cultivo de eucalipto 8 anos - foram coletadas para identifica\ue7\ue3o de fungos micorr\uedzicos arbusculares. Corpos de frutifica\ue7\ue3o de ectomicorrizas foram coletados nas tr\ue9s \ue1reas. Os resultados mostram que a identifica\ue7\ue3o indireta (cultura armadilha) com Brachiaria brizantha (A. Rich.) Stapf foi eficiente na recupera\ue7\ue3o do in\uf3culo de fungos micorr\uedzicos arbusculares no solo. Os g\ue9neros de FMAs presentes nas \ue1reas avaliadas foram Glomus, Gigaspora, Acaulospora e Scutellospora. As esp\ue9cies de fungos ectomicorr\uedzicos que mais se destacam foram Pisolithus sp. Alb. & Schewein; Scleroderma sp. (Persoon) Fries e Pisolithus microcarpus (Cooke & Massee) Cumm. O fungo ectomicorr\uedzico que apresentou a maior abund\ue2ncia relativa foi o Scleroderma sp. A \ue1rea de campo nativo apresentou maior popula\ue7\ue3o e diversidade de fungos micorrizicos arbusculares do que as \ue1reas de eucalipto.The Eucalyptus grandis W. Hill ex Maiden forms symbiotic association with arbuscular and ectomycorrhizal fungi. The porpoise of this work was to evaluate the direct and the indirect population and the diversity of these organisms in this kind forest of in some sandy areas located in the S\ue3o Francisco de Assis - RS. Soil and roots samples were collected from native field and Eucaliptus cultivation to identify arbuscular mycorrhizal fungi. Sporocarps of ectomycorrhizal fungi were also collected from these areas. The studied areas were characterized as native field and eucalyptus forest with three and eight years old. Results show that the indirect identification (trapping culture) with Brachiaria brizantha (A. Rich.) Stapf is efficient in the recovery endomycorrhizal inoculum fungi from the soil. The Glomus, Gigaspora, Acaulospora and Scutellospora were the most important genus found. The Acaulospora scrobiculata and Scutellospora heterogama were the predominant species. The ectomycorrhizal fungi found were Pisolithus sp. Alb. & Schewein; Scleroderma sp. (Persoon) Fries and Pisolithus microcarpus (Cooke & Massee) Cumm. The relative abundance was predominant with Scleroderma sp. The native field showed higher arbuscular mycorrhizal fungi population and diversity in relation to other eucaliptus areas

Evidence for the strangeness-changing weak decay Ξb−→Λb0π−\Xi_b^-\to\Lambda_b^0\pi^-

Using a $pp$ collision data sample corresponding to an integrated luminosity of 3.0~fb$^{-1}$, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay $\Xi_b^-\to\Lambda_b^0\pi^-$. No $b$ hadron decay of this type has been seen before. A signal for this decay, corresponding to a significance of 3.2 standard deviations, is reported. The relative rate is measured to be ${{f_{\Xi_b^-}}\over{f_{\Lambda_b^0}}}{\cal{B}}(\Xi_b^-\to\Lambda_b^0\pi^-) = (5.7\pm1.8^{+0.8}_{-0.9})\times10^{-4}$, where $f_{\Xi_b^-}$ and $f_{\Lambda_b^0}$ are the $b\to\Xi_b^-$ and $b\to\Lambda_b^0$ fragmentation fractions, and ${\cal{B}}(\Xi_b^-\to\Lambda_b^0\pi^-)$ is the branching fraction. Assuming $f_{\Xi_b^-}/f_{\Lambda_b^0}$ is bounded between 0.1 and 0.3, the branching fraction ${\cal{B}}(\Xi_b^-\to\Lambda_b^0\pi^-)$ would lie in the range from $(0.57\pm0.21)\%$ to $(0.19\pm0.07)\%$.Comment: 7 pages, 2 figures, All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-047.htm

Study of the production of Λb0\Lambda_b^0 and B‾0\overline{B}^0 hadrons in pppp collisions and first measurement of the Λb0→J/ψpK−\Lambda_b^0\rightarrow J/\psi pK^- branching fraction

The product of the $\Lambda_b^0$ ($\overline{B}^0$) differential production cross-section and the branching fraction of the decay $\Lambda_b^0\rightarrow J/\psi pK^-$ ($\overline{B}^0\rightarrow J/\psi\overline{K}^*(892)^0$) is measured as a function of the beauty hadron transverse momentum, $p_{\rm T}$, and rapidity, $y$. The kinematic region of the measurements is $p_{\rm T}<20~{\rm GeV}/c$ and $2.0<y<4.5$. The measurements use a data sample corresponding to an integrated luminosity of $3~{\rm fb}^{-1}$ collected by the LHCb detector in $pp$ collisions at centre-of-mass energies $\sqrt{s}=7~{\rm TeV}$ in 2011 and $\sqrt{s}=8~{\rm TeV}$ in 2012. Based on previous LHCb results of the fragmentation fraction ratio, $f_{\Lambda_B^0}/f_d$, the branching fraction of the decay $\Lambda_b^0\rightarrow J/\psi pK^-$ is measured to be \begin{equation*} \mathcal{B}(\Lambda_b^0\rightarrow J/\psi pK^-)= (3.17\pm0.04\pm0.07\pm0.34^{+0.45}_{-0.28})\times10^{-4}, \end{equation*} where the first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the branching fraction of the decay $\overline{B}^0\rightarrow J/\psi\overline{K}^*(892)^0$, and the fourth is due to the knowledge of $f_{\Lambda_b^0}/f_d$. The sum of the asymmetries in the production and decay between $\Lambda_b^0$ and $\overline{\Lambda}_b^0$ is also measured as a function of $p_{\rm T}$ and $y$. The previously published branching fraction of $\Lambda_b^0\rightarrow J/\psi p\pi^-$, relative to that of $\Lambda_b^0\rightarrow J/\psi pK^-$, is updated. The branching fractions of $\Lambda_b^0\rightarrow P_c^+(\rightarrow J/\psi p)K^-$ are determined.Comment: 29 pages, 19figures. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-032.htm

Measurements of long-range near-side angular correlations in sNN=5\sqrt{s_{\text{NN}}}=5TeV proton-lead collisions in the forward region

Two-particle angular correlations are studied in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{\text{NN}}}=5$TeV, collected with the LHCb detector at the LHC. The analysis is based on data recorded in two beam configurations, in which either the direction of the proton or that of the lead ion is analysed. The correlations are measured in the laboratory system as a function of relative pseudorapidity, $\Delta\eta$, and relative azimuthal angle, $\Delta\phi$, for events in different classes of event activity and for different bins of particle transverse momentum. In high-activity events a long-range correlation on the near side, $\Delta\phi \approx 0$, is observed in the pseudorapidity range $2.0<\eta<4.9$. This measurement of long-range correlations on the near side in proton-lead collisions extends previous observations into the forward region up to $\eta=4.9$. The correlation increases with growing event activity and is found to be more pronounced in the direction of the lead beam. However, the correlation in the direction of the lead and proton beams are found to be compatible when comparing events with similar absolute activity in the direction analysed.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-040.htm

Search for the rare decays B0→J/ψγB^{0}\to J/\psi \gamma and Bs0→J/ψγB^{0}_{s} \to J/\psi \gamma

A search for the rare decay of a $B^{0}$ or $B^{0}_{s}$ meson into the final state $J/\psi\gamma$ is performed, using data collected by the LHCb experiment in $pp$ collisions at $\sqrt{s}=7$ and $8$ TeV, corresponding to an integrated luminosity of 3 fb$^{-1}$. The observed number of signal candidates is consistent with a background-only hypothesis. Branching fraction values larger than $1.7\times 10^{-6}$ for the $B^{0}\to J/\psi\gamma$ decay mode are excluded at 90% confidence level. For the $B^{0}_{s}\to J/\psi\gamma$ decay mode, branching fraction values larger than $7.4\times 10^{-6}$ are excluded at 90% confidence level, this is the first branching fraction limit for this decay.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-044.htm

Compressed representation of a partially defined integer function over multiple arguments

In OLAP (OnLine Analitical Processing) data are analysed in an n-dimensional cube. The cube may be represented as a partially defined function over n arguments. Considering that often the function is not defined everywhere, we ask: is there a known way of representing the function or the points in which it is defined, in a more compact manner than the trivial one