Results 91 to 100 of about 25,508 (290)

Schr\"odinger-Feynman quantization and composition of observables in general boundary quantum field theory

open access: yes, 2015
We show that the Feynman path integral together with the Schr\"odinger representation gives rise to a rigorous and functorial quantization scheme for linear and affine field theories.
Oeckl, Robert
core   +1 more source

Environmental Footprint of Diffuse Emissions in European Functional Urban Areas

open access: yesSustainable Development, EarlyView.
ABSTRACT This paper quantifies the environmental footprint of diffuse air emissions across 776 European functional urban areas (FUAs) from 2005 to 2022 by coupling Copernicus Atmosphere Monitoring Service (CAMS) gridded inventories with the Environmental Footprint (EF) 3.1 framework.
Iñaki Sasia, Gorka Bueno, Iker Etxano
wiley   +1 more source

Study on the Influence of Inconsistent Valve Parameters on LCC-HVDC Commutation and Operation

open access: yesIEEE Access, 2019
Line commutated converter high voltage direct current (LCC-HVDC) transmission has unique advantages and plays an irreplaceable role in the power system. It is of great significance to study the commutation process.
Yanyong Yang, Pinjia Zhang
doaj   +1 more source

Micro‐transitions and work identity: The case of academic entrepreneurs

open access: yesStrategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary This paper examines how academic entrepreneurs—scientists who found research‐based startups while remaining in academia—construct and sustain their professional identities amid frequent transitions between academic and entrepreneurial roles.
Marouane Bousfiha, Henrik Berglund
wiley   +1 more source

Local labor market frictions and platform‐based entrepreneurship

open access: yesStrategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary Building on prior research about the heterogeneous impact of labor shocks on individuals' propensity to start businesses, we explore how local labor market frictions affect individuals' selection into platform‐based entrepreneurship.
Ruiqing Cao, Yifan Lyu
wiley   +1 more source

Rapid identification method of commutation failure risk areas in HC-HVDC systems under single-phase faults

open access: yesInternational Journal of Electrical Power & Energy Systems
The hybrid cascaded high voltage direct current (HC-HVDC) systems combine MMC and LCC features. However, single-phase ground faults on the AC lines of the receiving end power grid can easily cause LCC commutation failure on the inverter side.
He Wang   +5 more
doaj   +1 more source

Homicide, punishment and deterrence in Australia

open access: yesSouthern Economic Journal, EarlyView.
Abstract Australian data encompassing 1910–2022, by year and state, were analyzed to estimate the effect of capital punishment on homicide rates. Our estimates showed that capital punishment had a negative and significant effect on homicides. In some specifications, the estimates implied that an execution was associated with 12.68 fewer homicides ...
Hugh Farrell, Vincent O'Sullivan
wiley   +1 more source

Adaptive VDCOL control strategy for the recovery of the UHVDC SPC system

open access: yesThe Journal of Engineering, 2019
The separating pole connection (SPC) mode of ultra-high-voltage direct current (UHVDC) can significantly improve the power stability, but when the AC bus of one pole is failed and two receiving systems are near, it may cause subsequent commutation ...
Shujun Yao   +3 more
doaj   +1 more source

Translation Invariant States on Twisted Algebras on a Lattice

open access: yes, 2009
We construct an algebra with twisted commutation relations and equip it with the shift. For appropriate irregularity of the non-local commutation relations we prove that the tracial state is the only translation-invariant ...
Baumgartner, Bernhard   +2 more
core   +1 more source

Fixing the Leaky Pipeline: Affirmative Action in Local Elite Colleges and Subject Choice

open access: yesSouthern Economic Journal, EarlyView.
ABSTRACT Women are largely underrepresented in STEM careers associated with higher labor market returns. This gender gap is even more stark in a context where societal biases are prevalent and female role models are lacking. This paper investigates the impact of an affirmative action (AA) policy implemented in an elite educational institution in India ...
Ritika Gupta
wiley   +1 more source

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