34 research outputs found
Efficient Collective Action for Tackling Time-Critical Cybersecurity Threats
The latency reduction between the discovery of vulnerabilities, the build-up
and dissemination of cyber-attacks has put significant pressure on
cybersecurity professionals. For that, security researchers have increasingly
resorted to collective action in order to reduce the time needed to
characterize and tame outstanding threats. Here, we investigate how joining and
contributions dynamics on MISP, an open source threat intelligence sharing
platform, influence the time needed to collectively complete threat
descriptions. We find that performance, defined as the capacity to characterize
quickly a threat event, is influenced by (i) its own complexity (negatively),
by (ii) collective action (positively), and by (iii) learning, information
integration and modularity (positively). Our results inform on how collective
action can be organized at scale and in a modular way to overcome a large
number of time-critical tasks, such as cybersecurity threats.Comment: 23 pages, 3 figures. Presented at the 21st Workshop on the Economics
of Information Security (WEIS), 2022, Tulsa, US
Artificial pancreas systems for people with type 2 diabetes: Conception and design of the european CLOSE project
In the last 10 years tremendous progress has been made in the development of artificial pancreas (AP) systems for people
with type 1 diabetes (T1D). The pan-European consortium CLOSE (Automated Glucose Control at Home for People with
Chronic Disease) is aiming to develop integrated AP solutions (APplus) tailored to the needs of people with type 2 diabetes
(T2D). APplus comprises a product and service package complementing the AP system by obligatory training as well as home
visits and telemedical consultations on demand. Outcome predictors and performance indicators shall help to identify people
who could benefit most from AP usage and facilitate the measurement of AP impact in diabetes care. In a first step CLOSE
will establish a scalable APplus model case working at the interface between patients, homecare service providers, and payers
in France. CLOSE will then scale up APplus by pursuing geographic distribution, targeting additional audiences, and enhancing
AP functionalities and interconnectedness. By being part of the European Institute of Innovation and Technology (EIT)
Health public-private partnership, CLOSE is committed to the EIT âknowledge triangleâ pursuing the integrated advancement
of technology, education, and business creation. Putting stakeholders, education, and impact into the center of APplus
advancement is considered key for achieving wide AP use in T2D care
TOI-836 : a super-Earth and mini-Neptune transiting a nearby K-dwarf
Funding: TGW, ACC, and KH acknowledge support from STFC consolidated grant numbers ST/R000824/1 and ST/V000861/1, and UKSA grant ST/R003203/1.We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and Sector 38. TOI-836 is a bright (T = 8.5 mag), high proper motion (âŒ200 mas yrâ1), low metallicity ([Fe/H]ââ0.28) K-dwarf with a mass of 0.68 ± 0.05 Mâ and a radius of 0.67 ± 0.01 Râ. We obtain photometric follow-up observations with a variety of facilities, and we use these data-sets to determine that the inner planet, TOI-836 b, is a 1.70 ± 0.07 Râ super-Earth in a 3.82 day orbit, placing it directly within the so-called âradius valleyâ. The outer planet, TOI-836 c, is a 2.59 ± 0.09 Râ mini-Neptune in an 8.60 day orbit. Radial velocity measurements reveal that TOI-836 b has a mass of 4.5 ± 0.9 Mâ, while TOI-836 c has a mass of 9.6 ± 2.6 Mâ. Photometric observations show Transit Timing Variations (TTVs) on the order of 20 minutes for TOI-836 c, although there are no detectable TTVs for TOI-836 b. The TTVs of planet TOI-836 c may be caused by an undetected exterior planet.Publisher PDFPeer reviewe
TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364)
using data from TESS Sector 11 and Sector 38. TOI-836 is a bright (
mag), high proper motion ( mas yr), low metallicity
([Fe/H]) K-dwarf with a mass of M and a
radius of R. We obtain photometric follow-up
observations with a variety of facilities, and we use these data-sets to
determine that the inner planet, TOI-836 b, is a R
super-Earth in a 3.82 day orbit, placing it directly within the so-called
'radius valley'. The outer planet, TOI-836 c, is a R
mini-Neptune in an 8.60 day orbit. Radial velocity measurements reveal that
TOI-836 b has a mass of M , while TOI-836 c has a mass
of M. Photometric observations show Transit Timing
Variations (TTVs) on the order of 20 minutes for TOI-836 c, although there are
no detectable TTVs for TOI-836 b. The TTVs of planet TOI-836 c may be caused by
an undetected exterior planet
Les dihydrochalcones de la pomme (extraction, sĂ©paration et intĂ©rĂȘt mĂ©dical)
STRASBOURG ILLKIRCH-Pharmacie (672182101) / SudocSudocFranceF
Extending Timbuk to Verify Functional Programs
International audienceTimbuk implements the Tree Automata Completion algorithm whose purpose is to over-approximate sets of terms reachable by a term rewriting system. Completion is parameterized by a set of equations defining which terms are equated in the approximation. In this paper we present two extensions of Timbuk which permit us to automatically verify safety properties on functional programs. The first extension is a language, based on regular tree expressions, which eases the specification of the property to prove on the program. The second extension automatically generates a set of equations adapted to the property to prove on the program
Dual linearly polarised 3D printed Phoenix cell for wide band metal only reflectarrays
International audienceThis study shows the potential of additive manufacturing for the fabrication of 3D Phoenix phase-shifting cell. With traditional microstrip printing technology, the cell has many advantages. Here, the authors demonstrate that the 3D printed version of the cell exhibits very good intrinsic performances in the 17-21 GHz frequency band. A deep insight into the operation mode of the cell is drawn in order to have a better understanding of its behaviour. Different prototypes are fabricated and measured to validate experimentally the numerical results
Améliorée de la bande passante de réseau réflecteur entiÚrement métallique à base de cellules Phoenix 3D
International audienceCet article étudie des réseaux réflecteurs entiÚrement métalliques à base de cellules Phoenix 3D, pour une réalisation en fabrication additive. La possibilité de faire varier la géométrie de la cellule dans les trois dimensions offre un avantage pour accroßtre la bande passante. Ici, l'effet de la hauteur des cellules est mis à profit pour atteindre une bande passante (-1dB sur le gain) de 18% à 20GHz