Results 31 to 40 of about 1,410 (194)

First-order selfadjoint singular differential operators in a Hilbert space of vector functions

Electronic Journal of Differential Equations, 2017
In this article, we give a representation of all selfadjoint extensions of the minimal operator generated by first-order linear symmetric multipoint singular differential expression, with operator coefficient in the direct sum of Hilbert spaces of ...
Pembe Ipek, Bulent Yilmaz, Zameddin I. Ismailov   +2 more
doaj  

Advances in causal discovery methods for ecological time series

Biological Reviews, EarlyView.
ABSTRACT Recent advances in data collection technologies (e.g. automated sensor networks, satellite remote sensing, and high‐throughput sequencing) have greatly expanded the availability of ecological time series, enabling new opportunities for causal analyses in dynamic ecosystems.
Kenta Suzuki, Masato Yamamichi, Yutaka Osada, Masayuki Ushio, Kohei Nakajima, Hiroshi Masuya, Shohei Shimizu   +6 more
wiley   +1 more source

Selfadjoint extensions of multipoint singular differential operators

Electronic Journal of Differential Equations, 2013
This article describes all selfadjoint extensions of the minimal operator generated by a linear singular multipoint symmetric differential-operator expression for first order in the direct sum of Hilbert spaces of vector-functions.
Zameddin I. Ismailov
doaj  

Representation Results for Operators Generated by Quasi-Differential Multi-Interval System in a Hilbert Direct Sum Space

Rocky Mountain Journal of Mathematics, 2006
When dealing with Schrödinger operators with non-locally-integrable potentials or with Schrö\-din\-ger operators on graphs, it is convenient to split the domain into intervals \(I_i\) \((i\in \Omega)\) on which the potential is locally integrable. Then consider the differential operator \(T\) on the direct sum Hilbert space \(\bigoplus_{i\in\Omega }L^2(
openaire   +3 more sources

Rising Strong: Cultivating Resilience in Edible City Entrepreneurship. Insights Into the Landscape of Urban Food Initiatives

Business Strategy and the Environment, EarlyView.
ABSTRACT In response to growing global challenges, this study explores how social entrepreneurship within the Edible City movement contributes to building resilient, sustainable, and equitable urban food systems. Drawing on semistructured interviews with over 70 stakeholders across five cities—Berlin, Andernach, Oslo, Rotterdam, and Havana—we ...
Ina Säumel, Stephanie Ligan, Alice Bischof, Edi Emilov Ivanov, Laura Martinez‐Izquierdo, Sara Noémie Plassnig, Marisa Pettit   +6 more
wiley   +1 more source

Market and Nonmarket Strategies in Focus: How Entrepreneurs Tackling the Grand Challenge of Waste Management Navigate Institutional and Market Adversity in Ghana

Business Strategy and the Environment, EarlyView.
ABSTRACT Waste management remains a critical grand challenge in African countries. While entrepreneurship has been a viable strategy for addressing this challenge, it is fraught with constraints. This study investigates the strategies orchestrated by entrepreneurs to navigate adversity in Waste management and ensure the social and economic viability of
Tahiru Azaaviele Liedong, Abiodun Samuel Adegbile, Augustine Awuah Peprah, Bede Akorige Atarah   +3 more
wiley   +1 more source

Modular flow in JT gravity and entanglement wedge reconstruction

Journal of High Energy Physics
It has been shown in recent works that JT gravity with matter with two boundaries has a type II ∞ algebra on each side. As the bulk spacetime between the two boundaries fluctuates in quantum nature, we can only define the entanglement wedge for each side
Ping Gao
doaj   +1 more source

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

Few‐Photon Fluorescence From Ultracold Bosons in an Optical Cavity

Contributions to Plasma Physics, EarlyView.
ABSTRACT Within a cavity quantum electrodynamics framework, we analyse the fluorescent spectrum of ultracold bosons in resonant and second‐harmonic generation (SHG) regimes. Two settings are considered: (i) (few) bosons in an optical lattice and (ii) a trapped two‐component dilute Bose–Einstein condensate (2BEC) within the Bogoliubov scheme.
Megha Gopalakrishna, Emil Viñas Boström, Claudio Verdozzi   +2 more
wiley   +1 more source

Daily Body (Dis‐)Satisfaction and Dietary Restriction in Women Across the Eating Disorder Spectrum

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Body dissatisfaction is a key risk factor in eating disorder development: It is theorized to promote dietary restriction, thereby contributing to symptom onset. Evidence for this pathway primarily comes from cross‐sectional or multi‐wave questionnaire studies in bulimia nervosa (BN) and anorexia nervosa (AN).
Michaela R. Buehler, Ann‐Kathrin Arend, Julia Reichenberger, Jens Blechert   +3 more
wiley   +1 more source