Results 31 to 40 of about 981,872 (286)
Asymptotic Charges Cannot Be Measured in Finite Time
, 2018 To study quantum gravity in asymptotically flat spacetimes, one would like to understand the algebra of observables at null infinity. Here we show that the Bondi mass cannot be observed in finite retarded time, and so is not contained in the algebra on ...
Bousso, Raphael +3 more
core +1 more source
Advanced Functional Materials, EarlyView.Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah +11 more
wiley +1 more source
EU Law and Mass Internet Metadata Surveillance in the Post-Snowden Era
Media and Communication, 2015 Legal frameworks exist within democracies to prevent the misuse and abuse of personal data that law enforcement authorities obtain from private communication service providers.
Nora Ni Loideain
doaj +1 more source
Complex amendment to Slovakia’s FOI Act might make it one of the most liberal in Europe [PDF]
, 2015 Andrej Školkay, head of the School of Communication and Mass Media in Bratislava, Slovakia, assesses the proposed amendment to Slovakia’s law on freedom of information, comparing it to the Czech act and looking at the changes it will herald if ...
Školkay, Andrej
core
Pose Detection and control of multiple unmanned underwater vehicles using optical feedback [PDF]
, 2014 This paper proposes pose detection and control algorithms in order to control the relative pose between two Unmanned Underwater Vehicles (UUVs) using optical feedback.
Barbaros Celikkol +5 more
core +3 more sources
Dual‐Ligand Metal‐Organic Frameworks via In Situ Amidoxime Engineering for Selective Ion Separation
Advanced Functional Materials, EarlyView.Inspired by microbial ion‐trapping mechanisms, a mild and universal strategy is developed to construct highly porous amidoxime‐functionalized MOFs. DFT calculations and molecular force measurements reveal that the dual‐ligand amidoxime configuration significantly strengthens Ga(III) affinity.
Zhifang Lv +9 more
wiley +1 more source
Al ' AdalahThe new pattern of learning for Indonesian Muslims, preferring references to religious knowledge through digital media, provides opportunities for Salafi groups to propose their religious teaching and movements, such as through Islamic-based websites, to
Muh Khamdan, Wiharyani, Nadiah Abidin
doaj +1 more source
Measurement of the mass sensitivity of QCM with ring electrodes using electrodeposition
Electrochemistry Communications, 2020 A practical method for calculating the mass sensitivity of quartz crystal microbalance (QCM) resonators with ring-shaped Au electrodes on one side based on electrodeposition is presented in this communication.
Jianguo Hu +5 more
doaj +1 more source
Who Is a Journalist and Why Does it Matter? Disentangling the Legal and Ethical Arguments [PDF]
, 2007 The contemporary debate about who is a journalist is occurring in two distinct domains: law and professional ethics. Although the debate in these domains is focused on separate problems, participants treat the central question as essentially the same ...
Henderson, Jennifer, Ugland, Erik
core +1 more source
A Search for Fine Structure of the Knee in EAS Size Spectra [PDF]
, 2001 28 size spectra of extensive air showers from 7 different experiments are analysed consistently. They are fitted by adjusting either 4 or 5 parameters: knee position, power law exponents above and below the knee, overall intensity and, in addition, a ...
Schatz, G.
core +3 more sources