659,397 Works

Experimental certification of an informationally complete quantum measurement in a device-independent protocol

Massimiliano Smania, Piotr Mironowicz, Mohamed Nawareg, Mar Paw, Adan Cabello & Mohamed Bourennane
Minimal informationally complete positive operator-valued measures (MIC-POVMs) are a special kind of measurements in quantum theory that have the property that the statistics of their d2-outcomes are enough to reconstruct any d-dimensional quantum state. For this reason, MIC-POVMs are referred to as “standard” measurements for quantum information. Here we report an experiment with entangled photon pairs that certifies for the first time a MIC-POVM for qubits following a “device-independent” protocol. That is, modeling the state...

Experimental certification of an informationally complete quantum measurement in a device-independent protocol

Massimiliano Smania, Piotr Mironowicz, Mohamed Nawareg, Mar Paw, Adan Cabello & Mohamed Bourennane
Minimal informationally complete positive operator-valued measures (MIC-POVMs) are a special kind of measurements in quantum theory that have the property that the statistics of their d2-outcomes are enough to reconstruct any d-dimensional quantum state. For this reason, MIC-POVMs are referred to as “standard” measurements for quantum information. Here we report an experiment with entangled photon pairs that certifies for the first time a MIC-POVM for qubits following a “device-independent” protocol. That is, modeling the state...

Visible nonlinear photonics via high-order-mode dispersion engineering

Yun Zhao, Xingchen Ji, Bok Young Kim, Prathamesh Donvalkar, Jae Jang, Chaitanya Joshi, Mengjie Yu, Chaitali Joshi, Renato DOMENEGUETTI & Felippe Barbosa
Over the past decade, remarkable advances have been realized in chip-based nonlinear photonic devices for classical and quantum applications in the near- and mid-infrared regimes. However, few demonstrations have been realized in the visible and near-visible regimes, primarily due to the large normal material group-velocity dispersion (GVD) that makes it challenging to phase match third-order parametric processes. In this paper, we show that exploiting dispersion engineering of higher-order waveguide modes provides waveguide dispersion that allows...

Visible nonlinear photonics via high-order-mode dispersion engineering

Yun Zhao, Xingchen Ji, Bok Young Kim, Prathamesh Donvalkar, Jae Jang, Chaitanya Joshi, Mengjie Yu, Chaitali Joshi, Renato DOMENEGUETTI & Felippe Barbosa
Over the past decade, remarkable advances have been realized in chip-based nonlinear photonic devices for classical and quantum applications in the near- and mid-infrared regimes. However, few demonstrations have been realized in the visible and near-visible regimes, primarily due to the large normal material group-velocity dispersion (GVD) that makes it challenging to phase match third-order parametric processes. In this paper, we show that exploiting dispersion engineering of higher-order waveguide modes provides waveguide dispersion that allows...

Database della pericolosità sismica MPS04

Carlo Meletti, Valentina Montaldo, Massimiliano Stucchi & Francesco Martinelli
The probabilistic seismic hazard maps of the Italian national territory are represented by shaking parameters on a regular grid spaced by 0.05° and using two shaking parameters, PGA (horizontal peak ground acceleration) and Sa(spectral acceleration). Maps in peak ground acceleration (PGA) are evaluated for different probabilities of exceedance in 50 years (9 probabilities, from 2% to 81%). For each evaluation it is available the distribution of the 50th percentile (median map, which is the reference...

National Fish Habitat Partnership (NFHP) Data System

U.S. Geological Survey, Science Analytics And Synthesis Program & National Fish Habitat Partnership
The National Fish Habitat Partnership (NFHP) Data System provides a means for the partnership to manage, access and visualize data products from across the partnership. This DOI has been replaced by 10.5066/F7M61H8F. Please see the new DOI for most up-to-date information.

National Fish Habitat Partnership (NFHP) Data System

U.S. Geological Survey, Science Analytics And Synthesis Program & National Fish Habitat Partnership
The National Fish Habitat Partnership (NFHP) Data System provides a means for the partnership to manage, access and visualize data from across the partnership. Although components of the data system may change with evolving technologies, we plan to continue cataloging NFHP data products in USGS ScienceBase.

Instant Ghost Imaging: Algorithm and On-chip Implementation

Zhe Yang, Wei-Xing Zhang, Yi-Pu Liu, Dong Ruan & Junlin Li
Ghost imaging (GI) is an imaging technique that uses the correlation between two light beams to reconstruct the image of an object. Conventional GI algorithms require large memory space to store the measured data and perform complicated offline calculations, limiting practical applications of GI. Here we develop an instant ghost imaging (IGI) technique with a differential algorithm and an implemented high-speed on-chip IGI hardware system. This algorithm uses the signal between consecutive temporal measurements to...

Instant Ghost Imaging: Algorithm and On-chip Implementation

Zhe Yang, Wei-Xing Zhang, Yi-Pu Liu, Dong Ruan & Junlin Li
Ghost imaging (GI) is an imaging technique that uses the correlation between two light beams to reconstruct the image of an object. Conventional GI algorithms require large memory space to store the measured data and perform complicated offline calculations, limiting practical applications of GI. Here we develop an instant ghost imaging (IGI) technique with a differential algorithm and an implemented high-speed on-chip IGI hardware system. This algorithm uses the signal between consecutive temporal measurements to...

Nexus of grazing management with plant and soil properties in northern China grasslands

Li Wang, Limin Luan, Fujiang Hou & Kadambot H. M. Siddique
A dataset on the effect of various 'grazing intensity' practices on grassland ecosystems. The key variables include 4 plant traits (vegetation coverage, above-ground plant biomass, root biomass, plant diversity) and 8 soil physiochemical properties (bulk density, moisture content, organic C, total and available N, total and available P, C:N ratio, and pH).

Nexus of grazing management with plant and soil properties in northern China grasslands

Li Wang, Limin Luan, Fujiang Hou & Kadambot H. M. Siddique
A dataset on the effect of various 'grazing intensity' practices on grassland ecosystems. The key variables include 4 plant traits (vegetation coverage, above-ground plant biomass, root biomass, plant diversity) and 8 soil physiochemical properties (bulk density, moisture content, organic C, total and available N, total and available P, C:N ratio, and pH).

Kaguya Gamma-Ray Spectrometer Corrected Spectra Bundle

None None
This archive contains Kaguya Gamma-Ray Spectrometer (KGRS) corrected and calibrated time-series spectra and ephemerides, pointing, and geometry (EPG) data for the nominal and extended observation periods of JAXA's SELENE (Kaguya) mission. The SELENE mission was the Japanese mission to the Moon with a main orbiter 'Kaguya' and two daughter relay satellites launched on Sep. 14, 2007. KGRS was mounted on the deck of the main orbiter. It employed a high-purity Ge (HPGe) crystal as a...

Supplementary material from "Wind conditions influence breeding season movements in a nomadic polygynous shorebird"

Johannes Krietsch, Mihai Valcu & Bart Kempenaers
Nomadism is a behaviour where individuals respond to environmental variability with movements that seem unpredictable in timing and direction. In contrast with migration, the mechanisms underlying nomadic movements remain largely unknown. Here, we focus on a form of apparent nomadism in a polygynous shorebird, the pectoral sandpiper (Calidris melanotos). Local mating opportunities are unpredictable and most males sampled multiple sites across a considerable part of their breeding range. We test the hypothesis that individuals decided...

Supplementary material from "Wind conditions influence breeding season movements in a nomadic polygynous shorebird"

Johannes Krietsch, Mihai Valcu & Bart Kempenaers
Nomadism is a behaviour where individuals respond to environmental variability with movements that seem unpredictable in timing and direction. In contrast with migration, the mechanisms underlying nomadic movements remain largely unknown. Here, we focus on a form of apparent nomadism in a polygynous shorebird, the pectoral sandpiper (Calidris melanotos). Local mating opportunities are unpredictable and most males sampled multiple sites across a considerable part of their breeding range. We test the hypothesis that individuals decided...

Supplementary material from "In situ analysis of shear bands and boundary layer formation in metals. 12 August 2019 8 January 2020"

Shwetabh Yadav & Dinakar Sagapuram
Shear banding is a plastic instability in large deformation of solids where the flow becomes concentrated in narrow layers, with broad implications in materials processing applications and dynamic failure of metals. Given the extremely small length and time scales involved, several challenges persist in studying the development of shear bands. Here, we present a new approach to study shear bands at low speeds using low melting point alloys. We use in situ imaging to directly...

Supplementary material from "In situ analysis of shear bands and boundary layer formation in metals. 12 August 2019 8 January 2020"

Shwetabh Yadav & Dinakar Sagapuram
Shear banding is a plastic instability in large deformation of solids where the flow becomes concentrated in narrow layers, with broad implications in materials processing applications and dynamic failure of metals. Given the extremely small length and time scales involved, several challenges persist in studying the development of shear bands. Here, we present a new approach to study shear bands at low speeds using low melting point alloys. We use in situ imaging to directly...

Supplementary material from "Control of synchronization ratios in clock/cell cycle coupling by growth factors and glucocorticoids"

S. Almeida, M. Chaves & F. Delaunay
The cell cycle and the circadian clock are essential cyclic cellular processes often synchronous in healthy cells. In this work, we use previously developed mathematical models of the mammalian cell cycle and circadian cellular clock in order to investigate their dynamical interactions. Firstly, we study unidirectional cell cycle → clock coupling by proposing a mechanism of mitosis promoting factor (MPF)-controlled REV-ERBα degradation. Secondly, we analyse a bidirectional coupling configuration, where we add the CLOCK:BMAL1-mediated MPF...

Supplementary material from "Control of synchronization ratios in clock/cell cycle coupling by growth factors and glucocorticoids"

S. Almeida, M. Chaves & F. Delaunay
The cell cycle and the circadian clock are essential cyclic cellular processes often synchronous in healthy cells. In this work, we use previously developed mathematical models of the mammalian cell cycle and circadian cellular clock in order to investigate their dynamical interactions. Firstly, we study unidirectional cell cycle → clock coupling by proposing a mechanism of mitosis promoting factor (MPF)-controlled REV-ERBα degradation. Secondly, we analyse a bidirectional coupling configuration, where we add the CLOCK:BMAL1-mediated MPF...

MAVEN ROSE Raw Data Bundle

None None
This bundle contains raw data concerning the radio signal transmitted from Earth and the radio signal received at Earth, calibration collections containing a prediction for the frequency of the radio signal received at Earth and information on the effects of Earth's ionosphere, troposphere, and weather, and a browse collection contains plots that provide an overview of received data.

The measurement of populist attitudes: Testing cross-national scales using item response theory

Steven M Van Hauwaert, Christian H Schimpf & Flavio Azevedo
Recent research in the populism literature has devoted considerable efforts to the conceptualisation and examination of populism on the individual level, that is, populist attitudes. Despite rapid progress in the field, questions of adequate measurement and empirical evaluation of measures of populist attitudes remain scarce. Seeking to remedy these shortcomings, we apply a cross-national measurement model, using item response theory, to six established and two new populist indicators. Drawing on a cross-national survey (nine European...

The measurement of populist attitudes: Testing cross-national scales using item response theory

Steven M Van Hauwaert, Christian H Schimpf & Flavio Azevedo
Recent research in the populism literature has devoted considerable efforts to the conceptualisation and examination of populism on the individual level, that is, populist attitudes. Despite rapid progress in the field, questions of adequate measurement and empirical evaluation of measures of populist attitudes remain scarce. Seeking to remedy these shortcomings, we apply a cross-national measurement model, using item response theory, to six established and two new populist indicators. Drawing on a cross-national survey (nine European...

The measurement of populist attitudes: Testing cross-national scales using item response theory

Steven M Van Hauwaert, Christian H Schimpf & Flavio Azevedo
Recent research in the populism literature has devoted considerable efforts to the conceptualisation and examination of populism on the individual level, that is, populist attitudes. Despite rapid progress in the field, questions of adequate measurement and empirical evaluation of measures of populist attitudes remain scarce. Seeking to remedy these shortcomings, we apply a cross-national measurement model, using item response theory, to six established and two new populist indicators. Drawing on a cross-national survey (nine European...

MAVEN ROSE Calibrated Data Bundle

P. Wither
This bundle contains the predicted and residual frequency received at Earth, and transmitted from Earth.

MAVEN ROSE Derived Data Bundle

None None
This bundle contains electron density profiles derived from frequency residuals during occultations.

Ageing Well Public Talks

Jitka Vseteckova

For the past 14 years I have been teaching clinicians, allied health professionals and the public, abroad as well as in the UK, on how to do so. I have been presenting my ‘Ageing Well’ Lecture Series in collaboration with Third Age University and Free Time University overseas and more recently in collaboration with primary care practices in the UK. https://www.youtube.com/watch?v=nPeKzzjKwmU&feature=youtu.be

These lectures are also a component of an international online education platform for...

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Affiliations

  • Imperial College London
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