Results 71 to 80 of about 25,508 (290)

Quantum Gravitational Bremsstrahlung, Massless versus Massive Gravity [PDF]

, 2007
The massive spin-2 quantum gauge theory previously developed is applied to calculate gravitational bremsstrahlung. It is shown that this theory is unique and free from defects. In particular, there is no strong coupling if the graviton mass becomes small.
A. Aubert, A. Vainshtein, C. Deffayet, D.G. Boulware, D.R. Grigore, D.V. Galtsov, G. Scharf, Günter Scharf, Julian B. Berchtold, M. Duetsch, S. Weinberg, S.J. Kovacs   +11 more
core   +4 more sources

Understanding Engagement in Collaborative Governance Networks Through Motivation, Learning, and Values

Environmental Policy and Governance, EarlyView.
ABSTRACT Collaborative governance networks are increasingly central to local climate action, yet research offers limited understanding of the personal, psychological, and informal factors that sustain engagement within them. This paper examines how such networks facilitate meaningful and lasting participation through an in‐depth study of Malmö Works, a
Gustav Osberg
wiley   +1 more source

Robust Control Using a Matrix Converter to Enhance Wind Turbine Systems

Energy Science &Engineering, EarlyView.
This study uses a more efficient and effective solution to improve the operational performance of a wind turbine‐based power system. This system uses a doubly fed induction generator and relies on a matrix converter and fractional‐order proportional–integral controller.
Sihem Ghoudelbourk, Habib Benbouhenni, Adil Yahdou, Zakaria Mohamed Salem Elbarary, Nicu Bizon   +4 more
wiley   +1 more source

A current deviation control parameter tuning method to suppress subsequent commutation failure

电力工程技术
If a subsequent commutation failure occurs in the line commutated converter-based high voltage direct current (LCC-HVDC) transmission system, it will have a seriously negative impact on the safe and stable operation of the AC-DC hybrid power grid. Aiming
LI Juan, ZHU Longzhen, ZU Lifeng, WANG Xianwei, YANG Meijuan   +4 more
doaj   +1 more source

A non-associative quantum mechanics

, 2005
A non-associative quantum mechanics is proposed in which the product of three and more operators can be non-associative one. The multiplication rules of the octonions define the multiplication rules of the corresponding operators with quantum corrections.
A. I. Nesterov, A. I. Nesterov, B. A. Bernevig, B. Grossman, M. Günaydin, P. Jordan, R. Jackiw, T. Kugo, V. Dzhunushaliev, Vladimir Dzhunushaliev   +9 more
core   +2 more sources

The politics of impact: How political ideology shapes perceptions of the environmental impact of individual actions

Journal of Consumer Psychology, EarlyView.
Abstract Although consumers who engage in the same sustainable behaviors objectively have the same environmental impact, this research finds that people's perceptions of that impact are subjective and systematically shaped by political ideology. Seven studies demonstrate that conservatives tend to perceive their sustainable actions to have less of a ...
Aylin Cakanlar, Katherine White, Remi Trudel   +2 more
wiley   +1 more source

Study on lightning overvoltage and commutation failure in UHV AC/DC hybrid system

The Journal of Engineering, 2019
Due to the high UHV AC/DC transmission line tower, the working voltage amplitude on the wire is large, causing lightning accidents. The paper first analyses the impact of lightning strike point on lightning overvoltage of 1000 kV UHV transformer ...
Shengwei Fang, Li Zhang, Liang Zou, Yongshuai Chen, Yali Wang   +4 more
doaj   +1 more source

Perception of Attendance: A Comprehensive Survey of Students, Faculty, and Administrators in US Dental Schools

Journal of Dental Education, EarlyView.
ABSTRACT Purpose/Objectives Class attendance has traditionally been viewed as essential for academic success and professional development, particularly in health professions education. However, evolving educational technologies and changing student demographics have sparked debate about the necessity of mandatory attendance policies, especially in the ...
Alice Chan, Molly D. Cohen, Evangelos Papathanasiou, Casey E. Rhines, Jolene R. Zirnheld, Dharini van der Hoeven   +5 more
wiley   +1 more source

Conditions for interoperability [PDF]

, 2005
Interoperability for information systems remains a challenge both at the semantic and organisational levels. The original three-level architecture for local databases needs to be replaced by a categorical four-level one based on concepts, constructions ...
Heather, Michael, Rossiter, Nick
core  

CSR disclosure and investment efficiency in MENA countries: The moderating role of CSR committee

Strategic Change, EarlyView.
ABSTRACT Corporate social responsibility disclosure (CSRD) is often recognized as a transparency mechanism that allows companies to communicate their commitment to CSR. However, CSRD may also exacerbate agency conflicts. This study addresses these two contrasting perspectives by investigating the impact of CSRD on investment efficiency and exploring ...
Mohamed Malek Belhoula, Imen Khanchel, Naima Lassoued, Rouba Jebri   +3 more
wiley   +1 more source