Results 61 to 70 of about 9,732,925 (321)

Influence of fire disturbance and biophysical heterogeneity on pre‐settlement ponderosa pine and mixed conifer forests

open access: yesEcosphere, 2016
Fire frequency is assumed to have exerted a strong influence on historical forest communities in the inland Pacific Northwest. This study reconstructs forest structure and composition in the year 1890 and fire frequency from 1760 to 1890 at 10 sites ...
James D. Johnston   +2 more
doaj   +1 more source

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

open access: yesAdvanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch   +3 more
wiley   +1 more source

Savanna canopy trees under fire: long‐term persistence and transient dynamics from a stage‐based matrix population model

open access: yesEcosphere, 2019
Fire is a major disturbance driving the dynamics of the world's savannas. Almost all fires are set by humans who are increasingly altering fire timing and frequency on every continent.
Patricia A. Werner, Stephanie J. Peacock
doaj   +1 more source

Entropy‐Driven Design of Low‐Melting‐Point Alloys via Compositionally Complex Strategy

open access: yesAdvanced Engineering Materials, EarlyView.
Conventional low‐melting‐point alloys (LMPAs) are limited by a narrow compositional space and inherent property trade‐offs. This review presents an entropy‐driven design strategy that overcomes these limitations, ushering in a new class of low‐melting‐point compositionally complex alloys (LMCCAs).
Yinghui Shang   +6 more
wiley   +1 more source

Effects of overstory structure and fire regime upon diversity and abundance of selected understory species in longleaf pine (Pinus palustris Mill.) forests in southeastern Georgia

open access: yesJournal of Forest Science, 2003
We examined the impacts of variation in overstory structure and burning regime on understory vegetation in the longleaf pine (Pinus palustris Mill.) forest of the Okefenokee National Wildlife Refuge in southeastern Georgia, U.S.A.
W. Keith Moser, Chui Kwan Yu
doaj   +1 more source

Investigating the Low‐Temperature Phase Stability of the Binary Ta–W System

open access: yesAdvanced Engineering Materials, EarlyView.
Atomistic simulations show that the binary Ta–W system forms ordered intermetallic phases, B2‐TaW and D03‐TaW3, as 0 K ground states. Configurational entropy, however, lowers the free energy of the disordered bcc solid solution, which becomes the stable phase above about 400 K.
Klemens Lechner   +7 more
wiley   +1 more source

The Frequency of Fire in East Texas Forests

open access: yesIndex of Texas Archaeology Open Access Grey Literature from the Lone Star State, 2000
The debate over the use of fire by Native Americans has been a lively one for many years. Did they or did they not set fires? If they did, how frequently and for what purpose? If not, did they take advantage of naturally occurring fires for the same purposes? If so, how frequently and to what intensity did those natural fires occur?
Jurney, David H.   +2 more
openaire   +3 more sources

Connecticut State Fire Safety Code (2018); Other title: Connecticut state fire safety code

open access: yes, 2018
Effective October 1, 2018.; Title from cover.; Based on the 2015 editions of the ICC Fire Code and NFPA 101, Life Safety Code.; "The Connecticut State Fire Safety Code shall be administered as provided in chapter 541 of the Connecticut General Statutes"-
Connecticut. Office of the State Fire Marshal,
core   +1 more source

Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers

open access: yesAdvanced Functional Materials, EarlyView.
We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang   +12 more
wiley   +1 more source

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