Results 61 to 70 of about 13,283 (207)

Certified Organic Forests & Timber: the Hippocratic Opportunity [PDF]

open access: yes, 2007
Organic farming was proposed in 1940 by Lord Northbourne as a response to chemical agriculture. Since then, organic agriculture has developed into an international A$50 billion industry with annual growth reported up to 30%.
Paull, John
core  

Grammars with two-sided contexts

open access: yes, 2014
In a recent paper (M. Barash, A. Okhotin, "Defining contexts in context-free grammars", LATA 2012), the authors introduced an extension of the context-free grammars equipped with an operator for referring to the left context of the substring being ...
Barash, Mikhail, Okhotin, Alexander
core   +2 more sources

Subfreezing operation of polymer electrolyte fuel cells: Ice formation and cell performance loss [PDF]

open access: yes, 2012
In this work, we investigate the cold-start operation of polymer electrolyte fuel cells (PEFCs) through high-resolution neutron radiography, experimental testing, theoretical evaluation, and comparison with model prediction.
Borup, RL   +4 more
core   +2 more sources

Political Science's Engagement With the Sustainability Challenge: A Semi‐Systematic Review of the Voluntary Sustainability Standards (VSS) Governance Literature

open access: yesSustainable Development, Volume 33, Issue S1, Page 459-474, November 2025.
ABSTRACT The implications of sustainable development are far reaching, and yet many areas of academic scholarship were slow to deeply engage with it. This is a problem because, in practical terms, it can generate a false sense of calm, of business as usual, and a failure to rise to the integrative challenge of balancing the trade‐offs across ...
Fred Gale   +5 more
wiley   +1 more source

Visualization of the Oxygen Partial Pressure on the Gas Diffusion Layer inside a Polymer Electrolyte Fuel Cell during Cell Operation at Temperatures Higher than 100 °C

open access: yesChemElectroChem, Volume 12, Issue 20, October 16, 2025.
The graphical abstract shows that liquid water as well as water vapor is present inside the catalyst layer (CL) and the gas diffusion layer (GDL) even at temperature above 100 °C, especially near the outlet as well as at the edges of the rib and under the rib.
Christopher L. Schreiber   +5 more
wiley   +1 more source

Analysis of timber as sustainable material for construction [PDF]

open access: yes, 2014
Comunicació presentada a IN-TECH 2014 International Conference on Innovative Technologies (Leiria, Portugal 10-13, september 2014).Facing the climate change scenario, professionals and technicians of civil engineering and architecture are searching for ...
Braulio-Gonzalo, Marta   +2 more
core  

Orchestrating Forest Policy in Italy: Mission Impossible? [PDF]

open access: yes, 2018
In the Italian political and economic agenda the forest sector occupies a marginal role. The forest sector in Italy is characterized by a high institutional fragmentation and centralized decision-making processes dominated by Public Forest ...
Carbone, F.   +6 more
core   +1 more source

Detection and Quantification of Over‐Humidification in Polymer Electrolyte Fuel Cells: Insights into Simulation, Imaging, and Sensors

open access: yesAdvanced Energy and Sustainability Research, Volume 6, Issue 9, September 2025.
This review highlights advanced methods for detecting and managing over‐humidification in polymer electrolyte fuel cells (PEFCs), emphasizing innovative sensors, simulation techniques, and imaging methods. By addressing the impact of water management on fuel‐cell performance and durability, this study outlines practical and sustainable solutions for ...
Maximilian Käfer   +2 more
wiley   +1 more source

Development of a measurement technique for current-density in PEFC using planar surface coil as a NMR signal detector (Third report: Inversion analysis of current-density distribution generating in PEFC at case of current flowing in lamination direction)

open access: yesNihon Kikai Gakkai ronbunshu, 2014
In the second report, a method for measuring the spatial distribution of the electric current generated in a PEFC from the frequency shift of the Nuclear Magnetic Resonance (NMR) signal of water acquired by eight planar surface coils inserted into the ...
Kuniyasu OGAWA   +3 more
doaj   +1 more source

Have significant biodiversity values been protected from industrial logging across Australia?

open access: yesConservation Science and Practice, Volume 7, Issue 8, August 2025.
Abstract Much of the planet's forest biodiversity is at risk from a range of threats. Threats include gaps in the protected area network and instances where these gaps are subject to intensive industrial logging. These gaps are referred to as optimal areas for protection and we sought to determine if certification schemes maintained the environmental ...
Chris Taylor   +4 more
wiley   +1 more source

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