Tem palhaço na Educação Física escolar? Tem, sim senhor!

Neste estudo relatamos a implementação do ensino do palhaço como conteúdo nas aulas de Educação Física numa turma de 8.º ano de Ensino Fundamental de uma escola pública. O público-alvo foram 30 alunos de 12-17 anos (13 meninas e 17 meninos). As aulas ocorreram duas vezes por semana, num total de dez, ministradas por 2 professores monitores, orientados por 1 professor orientador local e 1 professor orientador especialista em palhaçaria. Nas aulas pesquisou-se o imaginário dos alunos sobre circo e palhaço; foram propostos jogos que buscaram o riso, exposições sobre quatro palhaços brasileiros, atividades que buscaram a conexão entre as pessoas, acrobacias cômicas e uma avaliação final com desenhos. Finalmente, o relato aponta que é possível inserir o palhaço nas aulas de Educação Física e que esse processo pode promover mudanças no comportamento dos alunos e ampliar o imaginário circense brasileiro

BACIAS, PROBLEMAS E POTENCIALIDADES: ESTUDO DE CASO ACERCA DO BAIXO CURSO DA BACIA HIDROGRÁFICA DO CÓRREGO BONSUCESSO, EM BELO HORIZONTE, MINAS GERAIS

Este artigo disserta acerca de conceitos atinentes a recursos hídricos, bacias hidrográficas e sua gestão. O trabalho mostra a imperiosa necessidade de se repensar o relacionamento entre seres humanos e recursos naturais. Utilizando uma pesquisa in loco aliada a uma metodologia de análise de observação, este artigo mostra problemas e alternativas de soluções para o córrego Bonsucesso, Belo Horizonte.AbstractThis paper explains concepts about water resources, watersheds and their management. It shows how important it is to (re)think about the relationship between human race and natural resources. Using a field research allied to an observational analysis, this paper shows troubles and candidate solutions for Bonsucesso creek, Belo Horizonte

A search for ultra-high-energy photons at the Pierre Auger Observatory exploiting air-shower universality

The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼0.2 EeV. It measures extensive air showers using a hybrid technique that combines a fluorescence detector (FD) with a ground array of particle detectors (SD). The signatures of a photon-induced air shower are a larger atmospheric depth at the shower maximum (X$_{max}$) and a steeper lateral distribution function, along with a lower number of muons with respect to the bulk of hadron-induced background. Using observables measured by the FD and SD, three photon searches in different energy bands are performed. In particular, between threshold energies of 1-10 EeV, a new analysis technique has been developed by combining the FD-based measurement of X$_{max}$ with the SD signal through a parameter related to its muon content, derived from the universality of the air showers. This technique has led to a better photon/hadron separation and, consequently, to a higher search sensitivity, resulting in a tighter upper limit than before. The outcome of this new analysis is presented here, along with previous results in the energy ranges below 1 EeV and above 10 EeV. From the data collected by the Pierre Auger Observatory in about 15 years of operation, the most stringent constraints on the fraction of photons in the cosmic flux are set over almost three decades in energy

Study on multi-ELVES in the Pierre Auger Observatory

Since 2013, the four sites of the Fluorescence Detector (FD) of the Pierre Auger Observatory record ELVES with a dedicated trigger. These UV light emissions are correlated to distant lightning strikes. The length of recorded traces has been increased from 100 μs (2013), to 300 μs (2014-16), to 900 μs (2017-present), to progressively extend the observation of the light emission towards the vertical of the causative lightning and beyond. A large fraction of the observed events shows double ELVES within the time window, and, in some cases, even more complex structures are observed. The nature of the multi-ELVES is not completely understood but may be related to the different types of lightning in which they are originated. For example, it is known that Narrow Bipolar Events can produce double ELVES, and Energetic In-cloud Pulses, occurring between the main negative and upper positive charge layer of clouds, can induce double and even quadruple ELVES in the ionosphere. This report shows the seasonal and daily dependence of the time gap, amplitude ratio, and correlation between the pulse widths of the peaks in a sample of 1000+ multi-ELVES events recorded during the period 2014-20. The events have been compared with data from other satellite and ground-based sensing devices to study the correlation of their properties with lightning observables such as altitude and polarity