Results 121 to 130 of about 79,101 (258)

Spatiotemporal Dynamics and Influencing Factors of Landscape Ecological Risk in the Shandong Peninsula Urban Agglomeration Based on Sub-Watershed Units

open access: yesRemote Sensing
Quantifying landscape ecological risk (LER) using multi-period land use data and ecological indicators is essential for understanding regional ecological dynamics. However, LER assessment is sensitive to spatial delineation, introducing uncertainty. This
Jue Xiao   +4 more
doaj   +1 more source

A Century of Understanding and Harnessing Heterosis

open access: yesPlant Breeding, EarlyView.
ABSTRACT Heterosis has shaped modern plant breeding since Darwin's 19th century observations that outcrossing restores vigour lost through selfing. While 100 years old, its mechanistic basis and deployability remain actively debated. Classical models of dominance, overdominance and epistasis provided the foundation for hybrid breeding and converted ...
Mohsen Mohammadi
wiley   +1 more source

PREPARATION AND CHARACTERIZATION OF ACETIC ACID LIGNIN-BASED EPOXY BLENDS

open access: yesBioResources, 2012
Lignin-based epoxy resin (LER) was prepared from phenolated lignin (PL) and epichlorohydrin (ECH) in the presence of sodium hydroxide. The eucalyptus acetic acid lignin (AAL) was first reacted with phenol in the presence of sulfuric acid to obtain PL ...
Fangeng Chen, Pan Feng,
doaj  

Multi-scale identification of driving forces for landscape ecological risk: A case study of the basin containing three plateau lakes in Yunnan, China

open access: yesEcological Indicators
The continuous development of society, rapid urbanization, industrialization, and climate change have intensified conflicts between fragile ecological systems and limited natural resources.
Shu Wang, Quanli Xu, Junhua Yi
doaj   +1 more source

LER Vacuum Studies [PDF]

open access: yes, 2000
During the Summer of 1999 the vacuum in LER was studied in order to answer a few questions: (1) how fast is the vacuum system cleaning; (2) when will the required operating pressure 10 nTorr be reached; (3) how fast do the TSP's saturate; and (4) what is the present average pressure in LER and what is the corresponding beam lifetime?
openaire   +1 more source

More Science Than Art: The First Botanical Garden in Portugal (c. 1650)

open access: yesRenaissance Studies, EarlyView.
ABSTRACT Gabriel Grisley, a German physician, came to Portugal and founded a garden near the Xabregas River in Lisbon, during the 1610s under the Spanish kings' rule. In view of the utility a botanic garden represented for the kingdom, he was able to obtain a royal privilege from King João IV during the Restauration War against the Spanish (1640–1668).
Ana Duarte Rodrigues
wiley   +1 more source

Assessing landscape ecological risk in the Southern Hill and Mountain Belt of China: A 30-year analysis and future projection

open access: yesEcological Indicators
Hills and mountains cover approximately 25 % of Earth’s landmass; therefore, investigating landscape ecological risk (LER) in these regions is imperative for ecosystem management.
Yezi Wang   +5 more
doaj   +1 more source

Ler, ou não ler: eis a questão

open access: yes, 2012
A literacia em saúde é de extrema importância em contexto familiar. Neste sentido, todos os setores sociais se devem envolvem para melhorar o estado de saúde das famílias. A capacitação dos cidadãos permite-lhes uma procura constante de qualidade de vida.
openaire   +1 more source

A Statistical Perspective on Transformers for Small Longitudinal Cohort Data

open access: yesStatistics in Medicine, Volume 45, Issue 23-24, October 2026.
ABSTRACT Modeling of longitudinal cohort data typically involves complex temporal dependencies between multiple variables. There, the transformer architecture, which has been highly successful in language and vision applications, allows us to account for the fact that the most recently observed time points in an individual's history may not always be ...
Kiana Farhadyar   +12 more
wiley   +1 more source

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