Results 21 to 30 of about 6,929,434 (416)

Effectiveness of COVID-19 vaccines against Omicron and Delta hospitalisation, a test negative case-control study

open access: yesNature Communications, 2022
SARS-CoV-2 variants of concern have been associated with reduced vaccine effectiveness, even after a booster dose. In this study, authors aim to estimate vaccine effectiveness against hospitalisation with the Omicron and Delta variants, using different ...
Julia Stowe   +4 more
doaj   +1 more source

Composite Metrics for Network Security Analysis [PDF]

open access: yesSoftware Networking, 2018(1), 137-160, 2020
Security metrics present the security level of a system or a network in both qualitative and quantitative ways. In general, security metrics are used to assess the security level of a system and to achieve security goals. There are a lot of security metrics for security analysis, but there is no systematic classification of security metrics that are ...
arxiv   +1 more source

Attendees at 6:30 P.M. Meeting [PDF]

open access: yes, 1968
Attendees at 6:30 P.M. Meeting: The President, Secretary of State Rusk, Secretary of Defense Clifford, Secretary of Treasury Fowler, CIA Director Helms, Joint Chief of Staff Chairman Wheeler, and ...
National Security Council (U.S.)
core   +1 more source

Speculative Securities [PDF]

open access: yesSSRN Electronic Journal, 1997
A speculative security is an asset whose payoff depends in part on a random shock uncorrelated with economic fundamentals (a sunspot) about which some traders have superior information. In this paper we show that agents may find it desirable to trade such a security in spite of the fact that it is a poorer hedge against their endowment risks at the ...
Rohit Rahi, José Marín
openaire   +5 more sources

Attention-based message passing and dynamic graph convolution for spatiotemporal data imputation

open access: yesScientific Reports, 2023
Although numerous spatiotemporal approaches have been presented to address the problem of missing spatiotemporal data, there are still limitations in concurrently capturing the underlying spatiotemporal dependence of spatiotemporal graph data ...
Yifan Wang   +6 more
doaj   +1 more source

The State of Food Security and Nutrition in the World 2020

open access: yes, 2020
Five years into the 2030 Agenda, it is time to assess progress and to question whether continuing efforts implemented thus far will allow countries to reach SDG 2 targets.
D. Missing
semanticscholar   +1 more source

Statistical Security for Social Security [PDF]

open access: yesDemography, 2012
Abstract The financial viability of Social Security, the single largest U.S. government program, depends on accurate forecasts of the solvency of its intergenerational trust fund. We begin by detailing information necessary for replicating the Social Security Administration’s (SSA’s) forecasting procedures, which until now has been ...
Soneji, Samir, King, Gary
openaire   +4 more sources

Bone metastatic carcinoma coexisting with plasma cell myeloma: a case report

open access: yesJournal of Medical Case Reports, 2022
Objective Multiple myeloma is a clonal plasma cell proliferation often causing bone lytic lesions. It is sometimes challenging to differentiate these lytic lesions associated with multiple myeloma from bone destruction due to a metastasis.
Marwa Aloui   +5 more
doaj   +1 more source

Security in online learning assessment towards an effective trustworthiness approach to support e-learning teams [PDF]

open access: yes, 2014
(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or ...
Caballé Llobet, Santiago   +3 more
core   +1 more source

Detecting Unauthorized Movement of Radioactive Material Packages in Transport with an Adam-Optimized BP Neural Network Model

open access: yesScience and Technology of Nuclear Installations, 2023
The rapid expansion of nuclear technology across various sectors due to global economic growth has led to a substantial rise in the transportation of radioactive materials.
Panpan Jiang   +7 more
doaj   +1 more source

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