Results 101 to 110 of about 2,062,967 (390)

Is interlocked grain an adaptive trait for tropical tree species in rainforest? [PDF]

open access: yes, 2009
Many trees in tropical rain forest exhibit interlocked grain. This phenomenon was observed, using a splitting method, on 10 trees from different genera in French Guiana. There were rather strong variations between and within trees. Different indexes were
Beauchêne, Jacques   +2 more
core  

Machine Learning‐Assisted Infectious Disease Detection in Low‐Income Areas: Toward Rapid Triage of Dengue and Zika Virus Using Open‐Source Hardware

open access: yesAdvanced Intelligent Discovery, EarlyView.
This study introduces an affordable machine learning platform for simultaneous dengue and zika detection using fluorine‐doped tin oxide thin films modified with gold nanoparticles and DNA aptamers. Designed for low‐cost, hardware‐limited devices (< $25), the model achieves 95.3% accuracy and uses only 9.4 kB of RAM, demonstrating viability for resource‐
Marina Ribeiro Batistuti Sawazaki   +3 more
wiley   +1 more source

Shading and Water Addition Alleviate the Elemental Limitations of the Early Restoration Community in a Stressful Environment

open access: yesPlants
Shading and water addition are essential management measures to improve seed germination and early seedling survival; however, little is known about their effects on leaf stoichiometry and nutrient status. We established 90 plant communities with shading
Fajun Chen   +5 more
doaj   +1 more source

Soil seed banks along elevational gradients in tropical, subtropical and subalpine forests in Yunnan Province, southwest China

open access: yesPlant Diversity, 2017
Soil seed banks are a vital part of ecosystems and influence community dynamics and regeneration. Although soil seed banks in different habitats have been reported, how soil seed banks vary with elevational gradients in different climatic zones is still ...
Xiaqin Luo   +6 more
doaj   +1 more source

The impact of long dry periods on the aboveground biomass in a tropical forest: 20 years of monitoring [PDF]

open access: gold, 2020
Milton Serpa de Meira   +5 more
openalex   +1 more source

Factorization Machine‐Based Active Learning for Functional Materials Design with Optimal Initial Data

open access: yesAdvanced Intelligent Discovery, EarlyView.
This work investigates the optimal initial data size for surrogate‐based active learning in functional material optimization. Using factorization machine (FM)‐based quadratic unconstrained binary optimization (QUBO) surrogates and averaged piecewise linear regression, we show that adequate initial data accelerates convergence, enhances efficiency, and ...
Seongmin Kim, In‐Saeng Suh
wiley   +1 more source

Vegetation Dynamics in Ecuador [PDF]

open access: yes, 2019
Global forest cover has suffered a dramatic reduction during recent decades, especially in tropical regions, which is mainly due to human activities caused by enhanced population pressures.
González-Jaramillo, Víctor Hugo
core   +1 more source

Does the abiotic environment influence the distribution of flower and fruit colors?

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Color in flowers and fruits carries multiple functions, from attracting animal partners (pollinators, dispersers) to mitigating environmental stress (cold, drought, UV‐B). With research historically focusing on biotic interactions as selective agents, however, it remains unclear whether abiotic stressors impact flower and fruit colors ...
Agnes S. Dellinger   +3 more
wiley   +1 more source

Losing the Arms Race: Greater Wax Moths Sense but Ignore Bee Alarm Pheromones

open access: yesInsects, 2019
The greater wax moth, Galleria mellonella L., is one of main pests of honeybees. The larvae burrow into the wax, damaging the bee comb and degenerating bee products, but also causes severe effects like driving the whole colony to abscond.
Yuan Li   +7 more
doaj   +1 more source

Methods and tools for assessing the vulnerability of forests and people to climate change [PDF]

open access: yes, 2008
Adaptation is necessary for reducing the impacts of climate change on forests and societies. So far, forests, forest ecosystem services, and forest-dependent people or sectors have not been adequately represented in adaptation studies or policies, even ...
Brockhaus, Maria   +4 more
core  

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