Results 51 to 60 of about 2,735,053 (160)

Cadmium concentration in cocoa beans produced in agroforestry systems of small producers in Panama

open access: yesSpanish Journal of Agricultural Research
Aim of study: To calculate Cd concentration in cocoa plants and evaluate its relationship with available Cd and other soil properties. Area of study: Almirante, Bocas del Toro province, Panama, in 2020-2021.
Jhon A. Villalaz-Pérez   +5 more
doaj   +1 more source

História e poesia: (comentários ao Proêmio tucidideano)

open access: yesRevista de História, 1989
Ao passo que Aristóteles aproximava a narrativa histórica do mito e da poesia, Tucídides definiu-a como um dominio do saber objetivo, acrescentando argumentos novos a antiga polêmica.
Francisco Muran Pires
doaj   +1 more source

De los intelectuales del círculo de París a los intelectuales indígenas: el campo político y la colonialidad del saber en Bolivia

open access: yesCiencia Política, 2019
En este artículo analizo el tránsito desde la concepción de “intelectual” utilizada en Bolivia con relación a la propuesta del “Círculo de París” y la emergencia de la categoría de “intelectual indígena” en el campo político. Para esto, profundizo, desde
Marianela Díaz
doaj   +1 more source

Ultrafast Consensus in Small-World Networks [PDF]

open access: yes, 2005
In this paper, we demonstrate a phase transition phenomenon in algebraic connectivity of small-world networks. Algebraic connectivity of a graph is the second smallest eigenvalue of its Laplacian matrix and a measure of speed of solving consensus ...
Olfati-Saber, Reza
core  

Learner emotions and performance in hypercasual VR games with adaptive AI difficulty

open access: yesBritish Educational Research Journal, EarlyView.
Abstract Hypercasual virtual reality games (HVRGs) are widely regarded as cost‐effective tools for rapid skill acquisition, yet the mechanisms that optimise their effectiveness and user acceptance remain insufficiently explored. This mixed‐methods empirical study investigates how playful emotions, characterised by engagement, enjoyment and anxiety ...
Zeeshan Ahmed, Faizan Ahmad, Chen Hui
wiley   +1 more source

Prevalência do excesso de peso e obesidade em escolares brasileiros da rede pública entre 2010 e 2014: situação que incomoda

open access: yesRevista Brasileira de Obesidade, Nutrição e Emagrecimento, 2017
Levando-se em consideração que sobrepeso e obesidade representam uma realidade no contexto mundial, e com o crescimento das produções científicas sobre o referido tema foi que esta pesquisa procedeu à investigação acerca da situação que se encontra o ...
Fábio Thomaz Melo
doaj  

Phage-Displayed Peptides Selected to Bind Envelope Glycoprotein Show Antiviral Activity against Dengue Virus Serotype 2

open access: yesAdvances in Virology, 2017
Dengue virus is a growing public health threat that affects hundreds of million peoples every year and leave huge economic and social damage. The virus is transmitted by mosquitoes and the incidence of the disease is increasing, among other causes, due ...
Carolina de la Guardia   +2 more
doaj   +1 more source

Digital Technologies Disclosure and the Cost of Capital: The Mediating Role of Sustainability Performance

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT This study examines the economic consequences of Digital Technologies Disclosure (DTD), focusing on its impact on the cost of capital. The increasing significance of digital transformation in shaping corporate strategies and market perceptions motivates the study.
Hussein Mohsen Saber Ahmed   +2 more
wiley   +1 more source

Advances in Parahydrogen‐Induced Polarization for Nuclear Magnetic Resonance of Peptides, Proteins, and Biopolymers

open access: yesChemistryEurope, EarlyView.
Hyperpolarization by parahydrogen‐induced polarization enhances the sensitivity of nuclear magnetic resonance spectroscopy of amino acids, peptides, mini‐proteins, and biopolymers using nonnatural amino acids with unsaturated side chains up to three orders of magnitude.
Gerd Buntkowsky
wiley   +1 more source

Continuous data assimilation for the three-dimensional Brinkman-Forchheimer-extended Darcy model

open access: yes, 2015
In this paper we introduce and analyze an algorithm for continuous data assimilation for a three-dimensional Brinkman-Forchheimer-extended Darcy (3D BFeD) model of porous media.
Markowich, Peter A.   +2 more
core   +1 more source

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