Results 61 to 70 of about 5,256,026 (319)

The Null Result Penalty

SSRN Electronic Journal, 2022
Abstract We examine how the evaluation of research studies in economics depends on whether a study yielded a null result. Studies with null results are perceived to be less publishable, of lower quality, less important and less precisely estimated than studies with large and statistically significant results, even when holding constant ...
Chopra, Felix, Haaland, Ingar, Roth, Christopher, Stegmann, Andreas   +3 more
openaire   +4 more sources

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, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

The Model of Statecraft in Mirror for Prince Case Study: Tarikh _e_Beihaqi [PDF]

Faṣlnāmah-i Pizhūhish/hā-yi Rāhburdī-i Siyāsat, 2018
In this essay we put forward the STATECRAFT as a modern issue and at the same time we are trying to recognize its live questions and matters. So in this context for a first time we tried to study TARIKH_E_BEIHAQI as a mirror for princes' book and ...
Ebrahim Barzegar, saeed hassanzadeh
doaj   +1 more source

Derivation of the Null Energy Condition [PDF]

, 2015
We derive the null energy condition, understood as a constraint on the Einstein-frame Ricci tensor, from worldsheet string theory. For a closed bosonic string propagating in a curved geometry, the spacetime interpretation of the Virasoro constraint ...
Parikh, Maulik, van der Schaar, Jan Pieter   +1 more
core   +3 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, Juliane Nagel, Daniel W. Heck, Nils Petras   +3 more
openaire   +2 more sources

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

Population Ecology, EarlyView.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva, João Hemerson de Sousa, Adriana Josefa da Rocha, Manuella Feitosa Leal, Lucas Ariel de Sousa Aguiar, Tamaris Gimenez Pinheiro, Edson Lourenço da Silva   +6 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

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, Mohamad Tabatabae nejad, hamidreza abasi   +2 more
doaj   +1 more source

Axisymmetric electrovacuum spacetimes with a translational Killing vector at null infinity

, 1999
By using the Bondi-Sachs-van der Burg formalism we analyze the asymptotic properties at null infinity of axisymmetric electrovacuum spacetimes with a translational Killing vector and, in general, an infinite ``cosmic string'' (represented by a conical ...
A Pravdová, Bicák J, Bicák J, Bicák J, Bicák J, Bondi H, J Bicák   +6 more
core   +2 more sources

Exact solutions of closed string theory [PDF]

, 1995
We review explicitly known exact $D=4$ solutions with Minkowski signature in closed bosonic string theory. Classical string solutions with space-time interpretation are represented by conformal sigma models.
A A Tseytlin, Bardakci K, Bars I, Bars I, Behrndt K, Brinkmann H W, Callan C, Callan C, De Alwis S, de Boer J, de Vega H, de Vega H, Duff M, Duff M J, Duval C, Ferrara S, Figueroa-O'Farrill J M, Forgács P, Forgács P, Fradkin E S, Fradkin E S, Friedan D, Friedan D, Galtsov D, Gauntlett J, Gibbons G W, Gürses M, Halpern M B, Halpern M B, Horowitz G, Horowitz G, Horowitz G, Horowitz G T, Howe P, Israel W, Johnson C, Kallosh R, Kehagias A, Khuri R, Kiritsis E, Kiritsis E, Kiritsis E, Kounnas C, Kounnas C, Lovelace C, Mohammedi N, Morozov A Yu, Mukhi S, Nesterenko V V, Park J, Penrose R, Peterman A, Peterman A, Polyakov A, Polyakov A M, Russo J G, Russo J G, Russo J G, Sfetsos K, Sfetsos K, Townsend P K, Tseytlin A A, Tseytlin A A, Witten E, Yoneya T, Zamolodchikov A B   +65 more
core   +2 more sources