Results 91 to 100 of about 178,348 (364)

Noncommutative theories and general coordinate transformations

open access: yes, 2004
We study the class of noncommutative theories in $d$ dimensions whose spatial coordinates $(x_i)_{i=1}^d$ can be obtained by performing a smooth change of variables on $(y_i)_{i=1}^d$, the coordinates of a standard noncommutative theory, which satisfy ...
C. D. Fosco   +3 more
core   +1 more source

A priori bounds for the generalised parabolic Anderson model

open access: yesCommunications on Pure and Applied Mathematics, EarlyView.
Abstract We show a priori bounds for solutions to (∂t−Δ)u=σ(u)ξ$(\partial _t - \Delta) u = \sigma (u) \xi$ in finite volume in the framework of Hairer's Regularity Structures [Invent Math 198:269–504, 2014]. We assume σ∈Cb2(R)$\sigma \in C_b^2 (\mathbb {R})$ and that ξ$\xi$ is of negative Hölder regularity of order −1−κ$- 1 - \kappa$ where κ<κ¯$\kappa <
Ajay Chandra   +2 more
wiley   +1 more source

Influence of transition resistance and fault moment on DC system commutation process caused by two-phase fault of AC system

open access: yesThe Journal of Engineering, 2018
Commutation failure caused by the fault of AC system at inverter side seriously affects the safety and stability of high-voltage direct current (HVDC) system.
Jinzhao Song   +3 more
doaj   +1 more source

Surprises in the relativistic free-particle quantization on the light-front [PDF]

open access: yes, 2004
We use the light front ``machinery'' to study the behavior of a relativistic free particle and obtain the quantum commutation relations from the classical Poisson brackets.
Sales, J. H. O.   +2 more
core   +2 more sources

Perturbative quantization of two-dimensional space-time noncommutative QED

open access: yes, 2009
Using the method of perturbative quantization in the first order approximation, we quantize a non-local QED-like theory including fermions and bosons whose interactions are described by terms containing higher order space-time derivatives. As an example,
D. Bahns   +4 more
core   +1 more source

Ngos' Contributions to Innovation: Innovation Enablers or Lead Innovators?

open access: yesCorporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study explores how non‐governmental organisations (NGOs) engage with innovation processes. Drawing on a comparative case study of two NGOs working in water sustainability, the paper analyses NGO involvement across seven stages of the innovation process.
Maria Cristina Pietronudo   +3 more
wiley   +1 more source

Mapping and Innovating Business Models of Food Hubs in Short Food Supply Chains

open access: yesCorporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Short food supply chains (SFSCs) offer sustainable alternatives to conventional food systems (CFSCs) but require effective intermediaries to scale and remain competitive. Food Hubs (FHs) serve this role by enhancing SFSC efficiency and market reach while upholding community‐oriented values. However, limited research has examined how FHs design
Marije Renkema‐Singh   +2 more
wiley   +1 more source

A Quantitative Index to Evaluate the Commutation Failure Probability of LCC-HVDC with a Synchronous Condenser

open access: yesApplied Sciences, 2019
Since thyristor cannot turn off automatically, line commutated converter based high voltage direct current (LCC-HVDC) will inevitably fail to commutate and therefore auxiliary controls or voltage control devices are needed to improve the commutation ...
Jiangbo Sha   +3 more
doaj   +1 more source

Landscape of Research on Accounting Scope 3 Emissions: A Review of Methodologies and Data

open access: yesCorporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Scope 3 emissions have been proposed as a critical metric for evaluating corporate carbon footprint, identifying emission sources, and developing mitigation solutions. Yet, widespread corporate reporting of Scope 3 emissions remains limited, highlighting a critical gap in both research and practice.
Zeyu Wang   +3 more
wiley   +1 more source

A Social Entrepreneurship Perspective of De‐Carbonising the Footprint through Recycling Compensation: A Case Study of the NGO Madre Coraje

open access: yesCorporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This research analyses the carbon footprint of the NGO Madre Coraje, using an integrated methodology that combines the calculator provided by REAS (Red de Economía Alternativa y Solidaria) Navarra and the Life Cycle Assessment (LCA). It quantifies emissions across the three scopes of the Greenhouse Gas Protocol, evaluating both direct and ...
José Fernandez‐Serrano   +2 more
wiley   +1 more source

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