Aula 4 - Simulação do voo
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This document discusses projectile motion and provides a simulation to demonstrate how the launch angle and initial velocity of a projectile affect its maximum height and horizontal range. Users can adjust the angle of launch and initial velocity and see how it impacts the path of the projectile in real-time. The simulation also displays equations for the maximum height and horizontal displacement of a projectile based on launch angle and initial velocity.
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Natação
Trabalho de Educação Física
Professora: Rochele
Aluno: Jeanderson Ventura Vicente
Turma:83º/Série:8º
Data:1106/2011
E.B.M. Batista Pereira
Recommended
Natação
Trabalho de Educação Física
Professora: Rochele
Aluno: Jeanderson Ventura Vicente
Turma:83º/Série:8º
Data:1106/2011
E.B.M. Batista Pereira
Monografia Glaycon análise cinemática da natação de iniciantes
Pode-se dizer que a iniciação esportiva se enquadra como uma fase do esporte. Na iniciação esportiva, o esporte deve ter um caráter prazeroso, onde os indíviduos vão conhecendo, automatizando e refinando os gestos específicos de cada modalidade. Dentro desse contexto, a natação surge como uma modalidade praticada desde a infância com ínumeros beneficios para seus praticantes. Assim, o presente trabalho, tem como objetivo analisar algumas variáveis do nado Crawl relacionadas com o desempenho técnico, tais como a velocidade média, frequência de braçadas, Índice de Coordenação e Comprimento de braçadas em crianças e adolescentes iniciantes na modalidade. Foram selecionados 20 voluntários do gênero feminino e masculino, todos praticantes da natação em projetos de iniciação esportiva com idades entre sete e quinze anos. O estudo buscou analisar as variáveis cinemáticas através de sistemas de filmagens do nado dos voluntários possibilitando análises qualitativas e quantitativas. Estes métodos são usados principalmente no esporte de alto rendimento, onde em sua maioria são usados equipamentos de alto custo, mais que para o presente trabalho, foram utilizados equipamentos alternativos, que possibilitaram análises semelhantes e com um custo/beneficio adequado para se trabalhar com a iniciação esportiva, como forma de proporcionar novos recursos nas correções e auxiliar professores que trabalham com a iniciação esportiva. Em relação aos resultados das variáveis cinemáticas, os voluntários apresentaram os seguintes resultados: velocidade média (VM) entre 0,61 m/s e 1,11 m/s; frequência de braçadas (FB) entre 21,22 ciclos/min e 75,52 ciclos/min; comprimento de braçadas (CB) entre 0,65 m e 2,13 m; índice de coordenação (IDC) entre – 26,442 % e 14,485 %. Diante dos resultados obtidos, o estudo se mostrou eficaz para as análises técnicas dos voluntários.
Natação
A natação é uma atividade física praticada na água. Na Grécia Antiga, esta atividade já era praticada por ser benéfica ao corpo humano. Este esporte já fazia parte das Olimpíadas na Grécia Antiga. No século XIX, os ingleses criaram as primeiras regras para a prática da natação enquanto esporte competitivo. Ainda no século XIX, as primeiras competições foram organizadas na Inglaterra.
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Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
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under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
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heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
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2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
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short interfering RNA (siRNA)
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Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
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Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
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Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
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MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
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