Results 71 to 80 of about 5,474,071 (364)
Modular Hamiltonians for deformed half-spaces and the averaged null energy condition [PDF]
, 2016 A bstractWe study modular Hamiltonians corresponding to the vacuum state for deformed half-spaces in relativistic quantum field theories on ℝ1,d−1$$ {\mathrm{\mathbb{R}}}^{1,d-1} $$.
T. Faulkner +3 more
semanticscholar +1 more source
Differential Geometry and its Applications, 2005 AbstractWe consider multiple-integral variational problems where the Lagrangian function, defined on a frame bundle, is homogeneous. We construct, on the corresponding sphere bundle, a canonical Lagrangian form with the property that it is closed exactly when the Lagrangian is null. We also provide a straightforward characterization of null Lagrangians
Michael Crampin, David Saunders
openaire +2 more sources
Uncovering null effects in null fields: the case of homeopathy
Journal of Clinical Epidemiology, 2023 Sigurdson, Sainani, and Ioannidis (Journal of Clinical Epidemiology, 2023) discussed homeopathy as a prototypical example of a “null field” where true effects are nonexistent and positive effect sizes reflect bias only. Based on a sample of published randomized placebo-controlled trials, they observed a remarkable effect in favor of homeopathy (Hedges’
Edgar Erdfelder +3 more
openaire +2 more sources
Null hypersurfaces in Lorentzian manifolds with the null energy condition [PDF]
Journal of Geometry and Physics, 2020 9 ...
Shintaro Akamine +3 more
openaire +3 more sources
Effectiveness of group metaphor model on school satisfaction and resilience of students with academic failure [PDF]
مطالعات روانشناسی تربیتی, 2019 The purpose of this study was to investigate the effect of metaphoric therapy on school satisfaction and resilience of students with decreasing academic performance in the second grade secondary school of Lenjan, 96-95.
abbas roohani, hamid eshraghi
doaj +1 more source
A review of international oil and gas pipeline agreements and its implication in the Iranian legal system [PDF]
Faṣlnāmah-i Pizhūhish-i Huqūq-i ̒Umūmī, 2020 Pipelines are one of the most commonly used means for onshore transportation of oil and gas. In general, there are two different approaches which can be used to form the legal framework for the construction and operation of international pipelines: the ...
Mehdi Piri +2 more
doaj +1 more source
Causal structure and degenerate phase boundaries [PDF]
, 1999 Timelike and null hypersurfaces in the degenerate space-times in the Ashtekar theory are defined in the light of the degenerate causal structure proposed by Matschull. Using the new definition of null hypersufaces, the conjecture that the "phase boundary"
A. Ashtekar +14 more
core +3 more sources
Null model analysis of species co-occurrence patterns
, 2000 The analysis of presence-absence matrices with ''null model'' randomization tests has been a major source of controversy in community ecology for over two decades.
N. Gotelli
semanticscholar +1 more source
Network topology drives population temporal variability in experimental habitat networks
Population Ecology, EarlyView.Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu +3 more
wiley +1 more source
The Use of Unconventional Weapons on the Viewpoints of International Criminal and Islamic Law [PDF]
پژوهش تطبیقی حقوق اسلام و غرب, 2015 War crime, as an international criminal act, has many forms which has been criminalized by the international criminal court statute. Some instances of war crime that have been internationally criminalized concern to the use of some kind of weapons in an
null null, nematallah nabavi
doaj +1 more source