Results 121 to 130 of about 100,064 (281)
Symmetry-protected nodal phases in non-Hermitian systems
, 2019 Non-Hermitian (NH) Hamiltonians have become an important asset for the effective description of various physical systems that are subject to dissipation. Motivated by recent experimental progress on realizing the NH counterparts of gapless phases such as
Bergholtz, Emil J. +3 more
core +1 more source
Finding Maximum Weight 2‐Packing Sets on Arbitrary Graphs
Networks, EarlyView.ABSTRACT A 2‐packing set for an undirected, weighted graph G=(V,E,w)$$ G=\left(V,\kern0.3em E,\kern0.3em w\right) $$ is a subset 𝒮⊆V such that any two vertices v1,v2∈𝒮 are not adjacent and have no common neighbors. The Maximum Weight 2‐Packing Set problem that asks for a 2‐packing set of maximum weight is NP$$ \mathbf{NP} $$‐hard. Next to 13 novel data
Jannick Borowitz +2 more
wiley +1 more source
The chemical diversity of comets
, 2009 A fundamental question in cometary science is whether the different dynamical classes of comets have different chemical compositions, which would reflect different initial conditions.
A. Lecacheux +16 more
core +1 more source
Nordic Journal of Botany, EarlyView.A new species of Lentibulariaceae, Pinguicula brendae Rodríguez‐Ramírez, H.Shimai & A.R. Andrés‐Hernández, is described based on its unique morphological characteristics. This species is restricted to limestone rock walls in the San Bartolo Tutotepec municipality, central‐eastern Hidalgo, Mexico, where it inhabits a single locality on vertical, north ...
Ernesto C. Rodríguez‐ Ramírez +2 more
wiley +1 more source
Hechtia mixtecana sp. nov. (Hechtioideae; Bromeliaceae), from Oaxaca, Mexico
Nordic Journal of Botany, EarlyView.Botanical explorations carried out in the state of Oaxaca, Mexico, led to the discovery of a new Bromeliaceae: Hechtia mixtecana,which is here described and illustrated. The new taxon is compared with the morphologically similar Hechtia fragilis, Hechtia lyman‐smithii, and Hechtia minuta.
Rodrigo Alejandro Hernández‐ Cárdenas +4 more
wiley +1 more source
Near Surface Geophysics, EarlyView.Abstract Electrical resistivity tomography (ERT) has been shown to be effective for surveying and monitoring dams, due to the method's sensitivity to moisture content and relevant physical properties (e.g., porosity). Automated ERT systems, capable of time‐lapse monitoring, can be used to detect variations in ground conditions.
John S. Ball +4 more
wiley +1 more source
Oikos, EarlyView.Spatially explicit individual‐based models provide a powerful way to explore spatial dynamics when direct observation is not feasible. But for many ecological applications, these models require detailed data on the initial spatial arrangement and traits of individuals – information rarely available in large, heterogeneous or novel landscapes.
Brayan Morera +4 more
wiley +1 more source
Migration, self selection and returns to education in the WAEMU. [PDF]
Using data from labour force surveys conducted simultaneously in the capital cities of seven West African Economic and Monetary Union countries, we estimate a model of residential location choice in which expected earnings play a role. The model is first
de Vreyer, Philippe +2 more
core
Polymer Composites, EarlyView.Activated Carbon as a Reinforcing Material for Starch Bioplastics. ABSTRACT Eco‐friendly starch‐based bioplastic films reinforced with activated carbon (AC) were produced using green plantain starch in its native and heat‐moisture treatment (HMT) forms to overcome typical limitations of starch materials, such as low mechanical strength and poor water ...
Eduardo Bruno Macêdo Viana +8 more
wiley +1 more source