Navegação Ciências Exatas e da Terra por Título
Resultados 4230-4249 de 5972
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O protagonismo controverso dos mestrados profissionais em ensino de ciências
(2015) [Artigo de periódico]O aumento da implantação de cursos de mestrado profissional em ensino vem sendo indicador dos novos contornos das políticas de formação impostos pela CAPES como agência reguladora da formação de professores. Dada a atual ... -
A proteção da natureza e do patrimônio da humanidade pela beleza cênica da paisagem
(2019) [Artigo de periódico]Quando as paisagens começaram a despertar nas sociedades humanas a necessidade da sua proteção? Qual o significado e a importância das belezas cênicas da paisagem? Por que as belezas cênicas são protegidas nas legislações? ... -
Protein profiling in hepatocellular carcinoma by label-free quantitative proteomics in two west african populations
(2013) [Artigo de periódico]Background: Hepatocellular Carcinoma is the third most common cause of cancer related death worldwide, often diagnosed by measuring serum AFP; a poor performance stand-alone biomarker. With the aim of improving on this, ... -
Protocol designs for NOON states
(2022) [Artigo de periódico]The ability to reliably prepare non-classical states will play a major role in the realization of quantum technology. NOON states, belonging to the class of Schrödinger cat states, have emerged as a leading candidate for ... -
Proton-proton forward scattering at the LHC
(2019) [Artigo de periódico]Recently the TOTEM experiment at the LHC has released measurements at √s=13 TeV of the proton-proton total cross section, σtot, and the ratio of the real to imaginary parts of the forward elastic amplitude, ρ. Since then ... -
Proton spin-lattice relaxation in TMMC [(ch/Sub 3/)/Sub 4/Nmncl/Sub 3/]
(1974) [Artigo de periódico]We examine the temperature and frequency dependence of the proton spin-1attice re1axation rate 1/T 1, as a probe of the electron-spin dynamics of the quasi-one-dimensional exchange-coupled paramagnet TMMC [(CH3) 4NMnC1J. ... -
Pseudorapidity distributions of charged hadrons in xenon-xenon collisionsat √sNN=5.44 TeV
(2019) [Artigo de periódico]Measurements of the pseudorapidity distributions of charged hadrons produced in xenon-xenon collisions at a nucleon-nucleon centre-of-mass energy of √sNN=5.44 TeV are presented. The measurements are based on data collected ... -
Pseudorapidity distributions of charged particles as a function of mid- and forward rapidity multiplicities in pp collisions at √s=5.02, 7 and 13 TeV
(2021) [Artigo de periódico]The multiplicity dependence of the pseudorapidity density of charged particles in proton–proton (pp) collisions at centre-of-mass energies s√ = 5.02, 7 and 13 TeV measured by ALICE is reported. The analysis relies on track ... -
PSS Health : como calcular tamanho de amostra para estimar média, proporção e correlação
(2021) [Artigo de periódico]A ferramenta PSS Health (Power and Sample Size for Health Researchers) foi desenvolvida com o propósito de facilitar o cálculo do tamanho amostral e do poder de testes de hipóteses para diferentes objetivos de estudo, ... -
PSS Health : como calcular tamanho de amostra para testar relações de variáveis com um desfecho binário
(2022) [Artigo de periódico]Dando continuidade à série de artigos que pretendem orientar o usuário na utilização da ferramenta PSS Health para o planejamento de uma pesquisa, esta edição apresenta um passo a passo de como realizar o cálculo para ... -
PSS Health : como calcular tamanho de amostra para testes de comparação de médias de dois grupos
(2022) [Artigo de periódico]Dando continuidade à série de artigos que pretendem orientar o usuário na utilização da ferramenta PSS Health para o planejamento de uma pesquisa, esta edição apresenta um passo a passo de como realizar o cálculo e de quais ... -
Psychosocial factors associated with adherence to treatment and quality of life in people living with HIV/AIDS in Brazi
(2014) [Artigo de periódico]Objective: The objective of this article was to investigate the biopsychosocial factors that influence adherence to treatment and the quality of life of individuals who have been successfully following the HIV/AIDS treatment. ... -
Pteridium catalensis SP.Nov., uma nova pteridófita fóssil do complexo carbonalítico Catalão I, Goiás
(2006) [Artigo de periódico]Pteridium catalensis sp. nov., pteridófita do Neógeno/Quaternário do município de Catalão, Goiás, é aqui erigida. Está representada por porções vegetativas e por estruturas férteis muito semelhantes às formas encontradas ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : I. Asteroseismology of the GW Virstars RX J2117+3412, HS 2324+3944, NGC 6905, NGC 1501, NGC 2371, and K 1−16
(2021) [Artigo de periódico]Context. The recent arrival of continuous photometric observations of unprecedented quality from space missions has strongly promoted the study of pulsating stars and caused great interest in the stellar astrophysics ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : II. Discovery of two new GW Vir stars: TIC 333432673 and TIC 095332541
(2021) [Artigo de periódico]Context. The Transiting Exoplanet Survey Satellite (TESS) mission is revolutionizing the blossoming area of asteroseismology, particularly of pulsating white dwarfs and pre-white dwarfs, thus continuing the impulse of its ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : III. Asteroseismology of the DBV star GD 358
(2022) [Artigo de periódico]Context. The collection of high-quality photometric data by space telescopes, such as the completed Kepler mission and the ongoing TESS program, is revolutionizing the area of white-dwarf asteroseismology. Among the different ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : IV. Discovery of two new GW Vir stars : TIC 0403800675 and TIC 1989122424
(2022) [Artigo de periódico]We present two new GW Vir-type pulsating white dwarf stars, TIC 0403800675 (WD J115727.68-280349.64) and TIC 1989122424 (WD J211738.38-552801.18) discovered in the Transiting Exoplanet Survey Satellite (TESS) photometric ... -
Pulsating low-mass white dwarfs in the frame of new evolutionary sequences : III. The pre-ELM white dwarf instability strip
(2016) [Artigo de periódico]Context. Many low-mass (M /M <∼ 0.45) and extremely low-mass (ELM, M /M <∼ 0.18−0.20) white-dwarf stars are currently being found in the field of the Milky Way. Some of these stars exhibit long-period gravity-mode (g-mode) ... -
Pulsating low-mass white dwarfs in the frame of new evolutionary sequences : VI. Thin H-envelope sequences and asteroseismology of ELMV stars revisited
(2018) [Artigo de periódico]Context. Some low-mass white-dwarf (WD) stars with H atmospheres currently being detected in our galaxy, show long-period g(gravity)-mode pulsations, and comprise the class of pulsating WDs called extremely low-mass variable ... -
Pulsating white dwarfs
(2017) [Artigo de periódico]The Sloan Digital Sky Survey has allowed us to increase the number of known white dwarfs by a factor of five and consequently the number of known pulsating white dwarfs also by a factor of five. It has also led to the ...