Results 171 to 180 of about 23,170 (262)

Twin Quadratic Polynomial Vector Fields in the Space C3

open access: yes
In this paper we study quadratic polynomial vector fields on C3 with 8 isolated singularities. Either two polynomial vector fields share six singularities with the same position and spectra and the remaining two singularities have some relation on their spectra, or two polynomial vector fields share five singularities with the same position and spectra
Llibre, Jaume, Valls, Clàudia
openaire   +1 more source

Identifying Peer Effects in Networks with Unobserved Effort and Isolated Students

open access: yesJournal of Applied Econometrics, EarlyView.
ABSTRACT Peer influence on effort devoted to some activity is often studied when effort is unobserved, and the researcher instead observes an outcome that combines effort with other shocks. For instance, in education, achievement measures such as GPA reflect both effort and idiosyncratic GPA shocks.
Aristide Houndetoungan   +2 more
wiley   +1 more source

Quantum annealing for inverse kinematics in robotics. [PDF]

open access: yesSci Rep
Salloum H   +6 more
europepmc   +1 more source

Line Graphs of Multigraphs and the Forbidden Graph E 6

open access: yesJournal of Graph Theory, EarlyView.
ABSTRACT The line graph Γ of a multigraph Δ is the graph whose vertices are the edges of Δ, where two such edges are adjacent if and only if they meet in a single vertex of Δ. We provide several characterizations of such line graphs and in particular show that a graph is a line graph if and only if it does not contain one of the 32 graphs, all of which
Hans Cuypers
wiley   +1 more source

Ultra‐High Frequency Ultrasound Imaging and Quantification of Microvascular Flow in Xenograft Renal Cell Carcinoma in an Avian Chorioallantoic Membrane Model

open access: yesJournal of Ultrasound in Medicine, EarlyView.
Patient‐derived xenograft (PDX) tumor models initiated in avian chorioallantoic membranes (CAM) are under investigation to evaluate the effectiveness of therapeutic options with the objective of personalizing treatments. CAM PDXs paired with ultra‐high frequency ultrasound (UHFUS) imaging could potentially constitute prospective high throughput assays ...
Sara Mar   +5 more
wiley   +1 more source

Seabird population responses after the removal of an introduced predator

open access: yesThe Journal of Wildlife Management, EarlyView.
We studied the response of a breeding population of seabirds (pigeon guillemots) to the removal of an introduced population of predators (American mink) from an archipelago that was formerly the largest aggregation of nesting guillemots in Prince William Sound, Alaska.
Samuel B. Stark   +4 more
wiley   +1 more source

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