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Showing 20 of 872 academic articles

Ergosphere and shadow of a rotating regular black hole

Sushant G. Ghosh, Muhammed Amir, Sunil D. Maharaj • Nuclear Physics B (2020)

The spacetime singularities in classical general relativity predicted by the celebrated singularity theorems are formed at the end of gravitational collapse. Quantum gravity is the expected theory to resolve the singularity problem but we a...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.nuclphysb.2020.115088

Curvature and thermal corrections in tree-level CPT-Violating Leptogenesis

Nick E. Mavromatos, Sarben Sarkar • European Physical Journal C: Particles and Fields (2020)

Abstract In a model for leptogenesis based on spontaneous breaking of Lorentz and $$\mathcal {CPT}$$ CPT symmetry [1–3], we examine the consistency of using the approximation of plane-wave solutions for a free spin-$$\frac{1}{2}$$ 12 Dirac ...

DOAJ Open Access (DOAJ) DOI: 10.1140/epjc/s10052-020-8109-1

Slow Solar Wind Connection Science during Solar Orbiter’s First Close Perihelion Passage

Stephanie L. Yardley, Christopher J. Owen, David M. Long, Deborah Baker et al. • The Astrophysical Journal Supplement Series (2023)

The Slow Solar Wind Connection Solar Orbiter Observing Plan (Slow Wind SOOP) was developed to utilize the extensive suite of remote-sensing and in situ instruments on board the ESA/NASA Solar Orbiter mission to answer significant outstandin...

DOAJ Open Access (DOAJ) DOI: 10.3847/1538-4365/acd24b

Perturbative spacetimes from Yang-Mills theory

Andrés Luna, Ricardo Monteiro, Isobel Nicholson, Alexander Ochirov et al. • Journal of High Energy Physics (2017)

Abstract The double copy relates scattering amplitudes in gauge and gravity theories. In this paper, we expand the scope of the double copy to construct spacetime metrics through a systematic perturbative expansion. The perturbative procedu...

DOAJ Open Access (DOAJ) DOI: 10.1007/JHEP04(2017)069

Why bisexuality is queer

Laura Corradi • Whatever (2018)

The essay starts with the author’s Positioning, a feminist practice of disclosing her own intellectual and political perspectives – since knowledge is situated, never neutral. In section 1. Coming to terms with bisexuality naming practices,...

DOAJ Open Access (DOAJ) DOI: 10.13131/2611-657X.whatever.v1i1.10

Problemáticas en torno de las ciberculturas. Una reflexión sobre las posibilidades y los límites de la etnografía virtual

Federico Álvarez Gandolfi • Cultura, Lenguaje y Representación (2016)

Resumen: Este artículo se propone presentar un acercamiento a los debates sobre la aplicación de técnicas propias del método etnográfico al estudio de comunidades que conforman y/o refuerzan lazos sociales en el ciberespacio. La necesidad d...

DOAJ Open Access (DOAJ)

Un espace public oppositionnel contrarié ? L’institutionnalisation partisane de la rébellion cynégétique en France

Christophe Baticle • Recherches Sociologiques et Anthropologiques (2015)

The emergence of a movement centred on hunting had something atypical about it on the French political scene in the late 1980’s, although similar phenomena developed at the same moment in Italy, the United Kingdom and Portugal. Initially, t...

DOAJ Open Access (DOAJ) DOI: 10.4000/rsa.1464

A Feminist Analysis of Security in Turkey

Simten Cosar, Gulden Ozcan • Journal of World-Systems Research (2021)

This article analyzes the securitization of the political space under the Adalet ve Kalkınma Partisi (Justice and Development Party, AKP) governments in Turkey with a critical feminist lens. We argue that a feminist reading unpacks the conn...

DOAJ Open Access (DOAJ) DOI: 10.5195/jwsr.2021.1034

THE IMAGE OF THE DIGITAL FUTURE: FORMATION IN MEDIA SPACE AND REPRESENTATION IN THE PUBLIC CONSCIOUSNESS / Образ цифрового будущего: формирование в медиапространстве и репрезентация в общественном сознании

ZOTOV VITALY V. / ЗОТОВ В.В., KONSON GRIGORY R. / КОНСОН Г.Р., VOLODENKOV SERGEY V. / ВОЛОДЕНКОВ С.В., GUBANOV ALEXANDER V. / ГУБАНОВ А.В. • Наука телевидения (2023)

In a turbulent society, the identification of perceptions of the future is a crucial component for decision-making. As digital transformation deepens, the image of the digital future, encompassing expectations, assumptions, and perceptions ...

DOAJ Open Access (DOAJ) DOI: 10.30628/1994-9529-2023-19.4-63-115

An Object-Based Image Analysis Method for Monitoring Land Conversion by Artificial Sprawl Use of RapidEye and IRS Data

Maud Balestrat, Stéphane Dupuy, Eric Barbe • Remote Sensing (2012)

In France, in the peri-urban context, urban sprawl dynamics are particularly strong with huge population growth as well as a land crisis. The increase and spreading of built-up areas from the city centre towards the periphery takes place to...

DOAJ Open Access (DOAJ) DOI: 10.3390/rs4020404

Features of reproduction of the shrub vole <i>Microtus majori</i> Thomas, 1906 in natural conditions

R. I. Dzuev, A. A. Cheprakova, F. H. Zhilyaeva, K. A. Mashukova • Юг России: экология, развитие (2020)

Aim. The purpose of this research based on the study of the ecological and biological characteristics of the shrub vole is to expand knowledge about patterns of microevolution in space, ecology and biology on the basis of which to assess th...

DOAJ Open Access (DOAJ) DOI: 10.18470/1992-098-2020-2-150-157

Imaging the ring opening reaction of 1,3-cyclohexadiene with MeV ultrafast electron diffraction

Wolf Thomas J. A., Yang Jie, Sanchez David M., Nunes J. Pedro. F. et al. • EPJ Web of Conferences (2019)

We resolve the structural dynamics of the ultrafast photoinduced ring opening reaction of 1,3-cyclohexadiene in space and time employing megaelectronvolt gas phase ultrafast electron diffraction. We, furthermore, observe coherent large ampl...

DOAJ Open Access (DOAJ) DOI: 10.1051/epjconf/201920507006

Ultra-Bend-Resistant 4-Core Simplex Cable Used for Short-Reach Dense Spatial Division Multiplexing Optical Transmission

Zelin Zhang, Yu Qin, Jie Zhu, Caoyuan Wang et al. • Micromachines (2024)

We optimized and fabricated an ultra-bend-resistant 4-core simplex cable (SXC) employing 4-core multicore fiber (MCF) suitable for short-reach dense spatial division multiplexing (DSDM) optical transmission in the O-band. The characteristic...

DOAJ Open Access (DOAJ) DOI: 10.3390/mi15010108

Photovoltaic Performance of Pin Junction Nanocone Array Solar Cells with Enhanced Effective Optical Absorption

Jinnan Zhang, Lingmei Ai, Xin Yan, Yao Wu et al. • Nanoscale Research Letters (2018)

Abstract The photovoltaic performance of axial and radial pin junction GaAs nanocone array solar cells is investigated. Compared with the cylinder nanowire arrays, the nanocone arrays not only improve the whole optical absorption but more i...

DOAJ Open Access (DOAJ) DOI: 10.1186/s11671-018-2727-7

All-inorganic lattice-contracted fabric image sensors for extreme-temperature radiography

Li Xu, Peng Ran, Wenqian Zhou, Jingshu Wang et al. • Nature Communications (2026)

Abstract Conventional X‑ray sensing fails in extreme temperatures due to a fundamental trilemma: no material offers strong absorption, flexibility, and thermal stability simultaneously. Rigid inorganic scintillators exhibit thermal quenchin...

DOAJ Open Access (DOAJ) DOI: 10.1038/s41467-026-71103-w