Results 31 to 40 of about 3,843,473 (354)

Grids and their minors

open access: yesJournal of Combinatorial Theory, Series B, 1989
We define graphs \(Y_ n\) such that none of these \(Y_ n\) has a minor isomorphic to \(K_ 8\) and for every number k and surface S not all of these graphs are in the completion of k-vertex extensions of graphs embeddable in S. This disproves a corresponding conjecture of \textit{N. Robertson} and \textit{P. D.
W. Wessel, D. G. Seese
openaire   +3 more sources

Distributed Computing in a Pandemic

open access: yesAdvances in Distributed Computing and Artificial Intelligence Journal, 2022
The current COVID-19 global pandemic caused by the SARS-CoV-2 betacoronavirus has resulted in over a million deaths and is having a grave socio-economic impact, hence there is an urgency to find solutions to key research challenges. Much of this COVID-19
Jamie Alnasir
doaj   +1 more source

A Concept for Attribute-Based Authorization on D-Grid Resources [PDF]

open access: yes, 2008
In Germany's D-Grid project numerous Grid communities are working together to provide a common overarching Grid infrastructure. The major aims of D-Grid are the integration of existing Grid deployments and their interoperability.
Gietz, P.   +6 more
core   +1 more source

The grid revisted

open access: yesDiscrete Mathematics, 1993
Diese Arbeit bezieht sich auf die Arbeit von \textit{P. Erdős} [Ann. Math. Mon. 53, 248-250 (1946; Zbl 0060.34805)]. Die originale Fragestellung wurde hier in einer verallgemeinerten Form aufgeschrieben: Sei eine Punktmenge \(P=\{p_1,p_2,\ldots,p_n\}\) in einem metrischen Raum \(M\supseteq P\) gegeben.
János Pach   +3 more
openaire   +2 more sources

Energy Storage Systems - Energizing the Future: A Review [PDF]

open access: yesE3S Web of Conferences
We are facing an energy deficit as a result of our growing energy demand [1]. In addition, with traditional energy sources depleting rapidly, solar and wind power have emerged as the primary alternatives for renewable energy.
Ravi Adarsh   +2 more
doaj   +1 more source

IVOA Recommendation: IVOA Support Interfaces

open access: yes, 2011
This document describes the minimum interface that a (SOAP- or REST-based) web service requires to participate in the IVOA. Note that this is not required of standard VO services developed prior to this specification, although uptake is strongly ...
Graham, Matthew   +3 more
core   +1 more source

A survey on cyber security for smart grid communications [PDF]

open access: yes, 2012
A smart grid is a new form of electricity network with high fidelity power-flow control, self-healing, and energy reliability and energy security using digital communications and control technology. To upgrade an existing power grid into a smart grid, it
Qian, Y, Sharif, H, Tipper, D, Yan, Y
core   +1 more source

Sums in the grid

open access: yesDiscrete Mathematics, 1996
Für \(k=2,3,\dots\) bedeutet \([k]^n= \{0,\dots,k-1\}^n\), also \([k]^n\subset\mathbb{Z}^n\), und mit \(A,B\subseteq[k]^n\) ist die Summe von \(A\) und \(B\) durch \(A+B:= \{a+b\in[k]^n; a\in A, b\in B\}\) erklärt. Das Hauptresultat dieser Arbeit ist es, eine bestmögliche untere Schranke für \(|A+ B|\) durch \(|A|\) und \(|B|\) zu geben; dabei wird für
Imre Leader, Béla Bollobás
openaire   +2 more sources

DiPerF: an automated DIstributed PERformance testing Framework

open access: yes, 2004
We present DiPerF, a distributed performance testing framework, aimed at simplifying and automating service performance evaluation. DiPerF coordinates a pool of machines that test a target service, collects and aggregates performance metrics, and ...
Dumitrescu, Catalin   +3 more
core   +3 more sources

A 100-element planar Schottky diode grid mixer [PDF]

open access: yes, 1992
The authors present a Schottky diode grid mixer suitable for mixing or detecting quasi-optical signals. The mixer is a planar bow-tie grid structure periodically loaded with diodes.
De Lisio, Michael P.   +4 more
core   +1 more source

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