Results 21 to 30 of about 68,511 (289)

Espaços educativos inovadores e o olhar dos professores para a ação docente

open access: yesRevista Educação e Cultura Contemporânea, 2019
Na maioria das comunidades educativas, o quadro atual de aprendizagem baseia-se na metáfora da aquisição: alunos devem adquirir conhecimento e competências e mostrar que cumprem metas específicas.
Daniela Diesel, João Filipe Matos
doaj   +1 more source

Effect of various ethanol/diesel cosolvents addition on combustion and emission characteristics of a CRDI heavy diesel engine

open access: yesEnergy Reports, 2022
Solubility between ethanol and diesel impedes the application of ethanol in diesel engines. The objective of the experiment is to compare combustion and emission characteristics of ethanol/diesel fuels using biodiesel, n-pentanol, tetrahydrofuran (THF ...
Jichao Liang   +4 more
doaj   +1 more source

Review: Insight on Porous Carbon Positive Electrode for Sodium‐Ion Capacitors: Interplay Between Synthesis, Properties, and Performance

open access: yesAdvanced Science, EarlyView.
Sodium ion capacitor (SIC) is currently constrained by the low discharge capacity of commercial activated carbon as positive electrode material. This review provides a holistic summary of research efforts on alternative porous carbon materials for SIC. Image created by the authors with www.biorender.com.
Ademola Adeniji   +2 more
wiley   +1 more source

TRATAMIENTO PARA CORTES DE PERFORACIÓN CONTAMINADOS CON DIÉSEL

open access: yesRevista Centro Azúcar, 2021
Introducción: En el proceso de perforación de los pozos de petróleo son utilizados lodos base agua o aceite, que durante estas actividades arrastran hacia la superficie fragmentos de rocas desprendidas por la acción de la barrena perforadora, denominados
Roberto Romero Silva   +5 more
doaj  

Designing Cost‐Effective Carbon Payments to Induce Cellulosic Feedstock Production for Sustainable Aviation Fuel

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT Perennial bioenergy crops, such as miscanthus and switchgrass, and crop residues have the potential to scale up sustainable aviation fuel (SAF) production and mitigate carbon emissions. However, high establishment costs, delayed returns, and risk–return profiles that diverge from those of conventional crops can hinder incentives to adopt ...
Fahd Majeed, Madhu Khanna, Ruiqing Miao
wiley   +1 more source

Kenyan Farmers' Policy Priorities During Economic Crisis and Stability: Insights From a Best‐Worst Scaling Experiment

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT Amid rising food and fertilizer prices, understanding farmers' policy preferences is critical for effective crisis response. We use best‐worst scaling experiment to assess Kenyan mobile‐owning crop farmers' preferences for government support under high and normal price scenarios.
Mywish K. Maredia   +4 more
wiley   +1 more source

Globalização, Convenção Quadro para o controle do tabaco e as disputas pelos rumos dos territórios fumicultores [PDF]

open access: yesRevista IDEAS, 2009
O direcionamento dos rumos dos territórios fumicultores gera conflitos entre os atores presentes e interdependentes há pelo menos quatro décadas. A elaboração de um Tratado Internacional (Convenção Quadro para o Controle do Tabaco – CQCT) agrava e traz ...
Alex Alexandre Mengel, Vivien Diesel
doaj   +1 more source

Estudos recentes sobre frações no campo da História da Educação Matemática: avanços e desafios

open access: yesRevista de Ensino de Ciências e Matemática, 2021
O objetivo deste artigo é discutir avanços e desafios do tema frações, identificados em pesquisas da História da educação matemática. Para tanto, examinamos quinze estudos recentes, publicados em eventos científicos e periódicos especializados, no ...
Barbara Winiarski Diesel Novaes   +1 more
doaj   +1 more source

Análisis operacional del departamento de hidrotratamiento de Reficar S.A [PDF]

open access: yes, 2017
ECOPETROL S.A. se encarga de la exploración, producción transporte, refinación y comercialización del petróleo y sus derivados.1 Es una compañía que está comprometida con su entorno, el ambiente y el país y la base de su organización es el talento humano
González Estrada, María Claudia
core  

The Role of Coordination Mechanisms and Transaction Costs Promoting Sustainability Performance in Agri‐Food Supply Chains: Evidence From Ecuador

open access: yesAgribusiness, EarlyView.
ABSTRACT Social tensions and resource depletion pose significant challenges to the agri‐food sector, highlighting the need for coordinated strategies to ensure sustainability in supply chains. Despite its critical importance, the relationship between coordination mechanisms and sustainability performance remains underexplored.
Carlos Moreno‐Miranda, Liesbeth Dries
wiley   +1 more source

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