Results 21 to 30 of about 2,723,889 (322)
Trees and valuation rings [PDF]
Transactions of the American Mathematical Society, 2000 Let \(D\) be a division algebra, finite dimensional over its centre \(F\). The set \(B\) of valuation rings (not necessarily invariant) in \(D\), regarded as a graph, forms a rooted tree (with the maximal element \(D\) as root). The authors ask whether every finite rooted tree can be realized in this way.
Brungs, Hans, Gräter, Joachim
openaire +3 more sources
IntCal20 Tree Rings: An Archaeological Swot Analysis
Radiocarbon: An International Journal of Cosmogenic Isotope Research, 2020 We undertook a strengths, weaknesses, opportunities, and threats (SWOT) analysis of Northern Hemisphere tree-ring datasets included in IntCal20 in order to evaluate their strategic fit with the demands of archaeological users.
A. Bayliss +5 more
semanticscholar +1 more source
The Isomorphism Relation Between Tree-Automatic Structures [PDF]
, 2010 An $\omega$-tree-automatic structure is a relational structure whose domain and relations are accepted by Muller or Rabin tree automata. We investigate in this paper the isomorphism problem for $\omega$-tree-automatic structures.
A. Blumensath +17 more
core +4 more sources
Acta Botânica Brasílica, 2016 The tree Piptadenia gonoachantha is widely used in forestry and in forest restoration projects, which require methods for evaluating tree growth. Long-term studies are necessary to determine patterns and detect changes in species growth rhythms.
Arno Fritz das Neves Brandes +3 more
doaj +1 more source
Monthly river flow modeling using earlywood vessel feature changes, and tree-rings
Ecological Indicators, 2021 Temporal records of river flow as essential data for water resource management plans are not available in many rivers around the world. In this study, monthly discharges of the Taskoh river in the north of Iran were simulated using dendrohydrology (the ...
Vahid Gholami +2 more
doaj +1 more source
The role of the 13C isotope of the Tree Ring in Recording of Carbon Cycle Change in Atmosphere
Jurnal Ilmu Dasar, 2014 Some natural materials such as tree rings, rocks, sediments, ice cores, coral reefs, shell fish and micro fossil record the chemical, physical and biological changes in atmosphere that had taken place in the past.
E. Ristin Pujiindiyati
doaj +1 more source
Capturing spiral radial growth of conifers using the superellipse to model tree-ring geometric shape
Frontiers in Plant Science, 2015 Tree-rings are often assumed to approximate a circular shape when estimating forest productivity and carbon dynamics. However, tree rings are rarely, if ever, circular, thereby possibly resulting in under- or over-estimation in forest productivity and ...
Pei-Jian eShi +9 more
doaj +1 more source
Frontiers in Forests and Global Change, 2023 AimsThrough analyzing the responses of the radial growth and element concentrations (B, Mg, Al, K, Ca, Mn, Fe, Zn, Na, P, Ni, and Cu) of tree rings of two dominant tree species to forest fires, we aimed to investigate the relationship between tree rings ...
Mao Wei +7 more
doaj +1 more source
Linking drought legacy effects across scales: From leaves to tree rings to ecosystems
Global Change Biology, 2019 Severe drought can cause lagged effects on tree physiology that negatively impact forest functioning for years. These “drought legacy effects” have been widely documented in tree‐ring records and could have important implications for our understanding of
Steven A. Kannenberg +6 more
semanticscholar +1 more source
Forest Systems, 2017 Aim and area of study: In the present paper we estimated the age of four monumental Pinus canariensis of Gran Canaria (Canary Islands, Spain) by means of tree-ring analysis.
Mar Génova +2 more
doaj +1 more source