Results 41 to 50 of about 329 (150)

Real‐Time Conformal Maps and Parameterizations

Computer Graphics Forum, EarlyView.
Abstract We present a simple algorithm to conformally map between two simple and bounded planar domains based on the concept of harmonic measure, which is a conformal invariant. With suitable preprocessing, the algorithm is fast enough to compute all possible conformal maps (having three real degrees of freedom) between the two domains in real time in
Q. Chang, C. Gotsman, K. Hormann
wiley   +1 more source

Contrasting Food Web Dynamics Across Oceanographic Boundaries in Subarctic Pelagic Ecosystems

Fisheries Oceanography, EarlyView.
ABSTRACT Understanding the structure of pelagic food webs across multiple trophic levels is critical for elucidating species interactions, energy flow, and anthropogenic impacts on production. This study presents a comprehensive analysis of the eastern North Pacific pelagic food webs, focusing on the Gulf of Alaska (GoA) during late winter of 2019.
Genyffer C. Troina, Evgeny A. Pakhomov, Laurie Weitkamp, Brian P. V. Hunt   +3 more
wiley   +1 more source

Topological Classification of Conformal Actions on pq-Hyperelliptic Riemann Surfaces

International Journal of Mathematics and Mathematical Sciences, 2007
A compact Riemann surface X of genus g>1 is said to be p-hyperelliptic if X admits a conformal involution ρ, for which X/ρ is an orbifold of genus p. If in addition X is q-hyperelliptic, then we say that X is pq-hyperelliptic.
Ewa Tyszkowska
doaj   +1 more source

Lights On or Off? The Efficacy of Light Therapy as Add‐On to Cognitive Behavioural Therapy for Insomnia—A Pilot Study

Journal of Sleep Research, EarlyView.
ABSTRACT Cognitive behavioural therapy for insomnia (CBT‐I) is recommended as first‐line treatment for insomnia disorder. However, around 25% of the patients do not respond to the treatment, and only 40% achieve full remission. The current study investigates the therapeutic potential of light therapy as an add‐on to CBT‐I.
Sarah R. Schmid, Christine Blume, Johanna Ell, Nikolas Konzen, Matthias Apweiler, Bernd Feige, Bernd L. Fiebich, Julian E. Schiel, Katharina Domschke, Kai Spiegelhalder   +9 more
wiley   +1 more source

Discrete Riemann surfaces [PDF]

, 2007
We detail the theory of Discrete Riemann Surfaces. It takes place on a cellular decomposition of a surface, together with its Poincaré dual, equipped with a discrete conformal structure. A lot of theorems of the continuous theory follow through to the discrete case, we define the discrete analogs of period matrices, Riemann's bilinear relations ...
openaire   +3 more sources

Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting

Journal of Time Series Analysis, EarlyView.
ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss, Panagiotis Maouris, Efstathios Paparoditis   +2 more
wiley   +1 more source

Dynamically encircling an exceptional point through phase-tracked closed-loop control

Communications Physics
The intricate complex eigenvalues of non-Hermitian Hamiltonians manifest as Riemann surfaces in control parameter spaces. At the exceptional points (EPs), the degeneracy of both eigenvalues and eigenvectors introduces noteworthy topological features ...
Sen Zhang, Yangyu Huang, Lei Yu, Kaixuan He, Ning Zhou, Dingbang Xiao, Xuezhong Wu, Franco Nori, Hui Jing, Xin Zhou   +9 more
doaj   +1 more source

Systèmes dynamiques algébriquement complètement intégrables et géométrie

Annals of the West University of Timisoara: Mathematics and Computer Science, 2015
In this paper I present the basic ideas and properties of the complex algebraic completely integrable dynamical systems. These are integrable systems whose trajectories are straight line motions on complex algebraic tori (abelian varieties). We make, via
Lesfari A.
doaj   +1 more source

Anomaly inflow for M5-branes on punctured Riemann surfaces

Journal of High Energy Physics, 2019
We derive the anomaly polynomials of 4d N = 2 $$ \mathcal{N}=2 $$ theories that are obtained by wrapping M5-branes on a Riemann surface with arbitrary regular punctures, using anomaly inflow in the corresponding M-theory setup.
Ibrahima Bah, Federico Bonetti, Ruben Minasian, Emily Nardoni   +3 more
doaj   +1 more source

Early results and lessons learned from biomanipulation and chemical restoration of a eutrophic shallow lake

Restoration Ecology, EarlyView.
Abstract Introduction Over 44% of European lakes fail to meet ecological quality standards, prompting substantial investment in lake restoration to achieve good ecological status. Unfortunately, effects are often short‐lived due to persistent internal phosphorus (P) loading and strong cyprinid‐driven bottom‐up control, which limits water quality ...
Emma Polauke, Kaj Sand‐Jensen, Christian Skov, Theis Kragh   +3 more
wiley   +1 more source