Results 11 to 20 of about 793,915 (265)
Frontiers in Plant Science, 2023 Many studies have investigated the effects of environmental context on biodiversity or multifunctionality in alpine regions, but it is uncertain how human pressure and climate may affect their relationships.
Chongchong Ye +4 more
doaj +1 more source
Stable isotopic compositions of precipitation in China [PDF]
Tellus: Series B, Chemical and Physical Meteorology, 2014 During the mid-1980s, there were 31 stations in China that successfully participated in the Global Network of Isotopes in Precipitation. However, most observations were suspended after the mid-1990s.
Jianrong Liu +4 more
doaj +1 more source
Complex networks on hyperbolic surfaces [PDF]
Physica A: Statistical Mechanics and its Applications, 2005 We explore a novel method to generate and characterize complex networks by means of their embedding on hyperbolic surfaces. Evolution through local elementary moves allows the exploration of the ensemble of networks which share common embeddings and consequently share similar hierarchical properties.
Aste, Tomaso +2 more
openaire +3 more sources
Fatigue of Aircraft Structures, 2023 This work is focused on the checking of the correctness of the brazing process of honeycomb seals to stationary elements of aircraft turbine engines. It describes this process, paying attention to the aspects that have a fundamental impact on whether the
Świerek Agata +3 more
doaj +1 more source
Robustness surfaces of complex networks [PDF]
Scientific Reports, 2014 Despite the robustness of complex networks has been extensively studied in the last decade, there still lacks a unifying framework able to embrace all the proposed metrics. In the literature there are two open issues related to this gap: (a) how to dimension several metrics to allow their summation and (b) how to weight each of the metrics.
Manzano, Marc +4 more
openaire +5 more sources
Towards a Common Framework for the Identification of Landforms on Terrain Models
ISPRS International Journal of Geo-Information, 2017 A landform is a physical feature of the terrain with its own recognisable shape. Its definition is often qualitative and inherently vague. Hence, landforms are difficult to formalise in a logical model that can be implemented. We propose for that purpose
Eric Guilbert, Bernard Moulin
doaj +1 more source
Frontiers in Future Transportation, 2021 Interactions among different modes or vehicle classes in urban road networks affect the network performance in different and complex ways. Thus, an answer to the question of “how many cars are too many for a city?” is not trivial.
Allister Loder +9 more
doaj +1 more source
Frontiers in Plant Science, 2022 Ecologically vulnerable areas (EVAs) are regions with ecosystems that are fragile and vulnerable to degradation under external disturbances, e.g., environmental changes and human activities.
Zhaogang Liu +12 more
doaj +1 more source
Networks of Steps on Crystal Surfaces
Physical Review Letters, 1996 Scanning tunneling microscopy observations show that steps on vicinal surfaces near (110) missingrow reconstructed surfaces of metals such as Au and Pt tend to form networks. A simple microscopic model introduced here shows that these networks are unstable (or metastable) against faceting. This leads to the formation of ridges between rounded areas and
Carlon, E., van Beijeren, H.
openaire +4 more sources
Short-term grazing exclusion has no impact on soil properties and nutrients of degraded alpine grassland in Tibet, China [PDF]
Solid Earth, 2015 Since the 1980s, alpine grasslands have been seriously degraded on the Tibetan Plateau. Grazing exclusion by fencing has been widely adopted to restore degraded grasslands.
X. Lu +6 more
doaj +1 more source