5,843 research outputs found
A Replication Scheme for Multiple Fragmentations with Overlapping Fragments
No full textIn this article, we introduce a replication procedure in a distributed database system that supports several fragmentations of the same data table. One application that requires multiple fragmentations is flexible (similarity-based) query answering. The major feature of our replication procedure is that replication and recovery respect the overlaps of fragments stemming from different fragmentations. In this paper we extend the data replication problem by not only considering hard constraints to ensure a fixed replication factor but also adding soft constraints that express desired data locality of fragments. We furthermore analyze the case that there are more fragmentations (leading to the situation that some replication conditions are optional); and we study the influences of data updates (insertions and deletions) on the data distribution.German Research Foundation [WI 4086/2-1
Do dolphins benefit from nonlinear mathematics when processing their sonar returns?
No full textAn interview with author Tim Leighton about the paper
Opportunities for linking young surveyors across professional surveying member organisations and FIG
No full textTim Di Muzio on 'Sabotage'
No full textIn a series of essays published in 2013 and 2014 on capitaspower.com, political economist Tim Di Muzio explored the concept of ‘sabotage’ as it applies to capitalist power. I recently rediscovered these essays and was so impressed by them that I have reposted them here as a single piece.
About the author: Tim Di Muzio is a researcher at the University of Wollongong. He is the author of numerous books, including Debt as power, Carbon capitalism, and The 1% and the Rest of us
1996-1997 Tim Gautreaux
No full textTim Gautreaux is the author of three novels and two earlier short story collections. His work has appeared in The New Yorker, The Best American Short Stories, The Atlantic, Harper’s, and GQ. After teaching for thirty years at Southeastern Louisiana University, he now lives, with his wife, in Chattanooga, Tennessee. (Photo credit: Randy Bergeron)https://egrove.olemiss.edu/grisham_res/1023/thumbnail.jp
Homomorphe Verschlüsselung für Cloud-Datenbanken: Übersicht und Anforderungsanalyse
No full textAuslagerung von Daten in Cloud-Datenbanken verspricht eine Reihe von Vorteilen wie reduzierte Wartungskosten, Flexibilität der Ressourcenverteilung und einfache Zugreifbarkeit von nahezu überall. Diese Datenbanken bieten dabei eine Vielzahl von Funktionalitäten, um Berechnungen auf Daten auszuführen. Datensicherheit (einschließlich dem Schutz persönlicher Daten) ist in Cloud-Datenbanken jedoch noch nicht angemessen umgesetzt worden. Konventionelle Verschlüsselungsverfahren garantieren zwar hohe Sicherheit, verhindern aber auch weitere Berechnungen auf den Daten. Modernere homomorphe Verschlüsselungsverfahren versprechen dagegen sowohl Datensicherheit als auch die Möglichkeit, auf verschlüsselten Daten zu rechnen. Das bestehende System FamilyGuard kombiniert bisher eigenschaftsbewahrende Verschlüsselungsverfahren. Um die Funktionalität auf Aggregationsfunktionen zu erweitern, soll in Zukunft auch homomorphe Verschlüsselung eingesetzt werden. In diesem Artikel geben wir eine Übersicht über diverse Kategorien homomorpher Verschlüsselungsverfahren und ihre Sicherheitsgrundlagen. Im Anschluss stellen wir Anforderungen für den Einsatz homomorpher Verfahren in Cloud-Datenbanken auf
First person - Tim Petzold
No full textFirst Person is a series of interviews with the first authors of a selection of papers published in Biology Open, helping researchers promote themselves alongside their papers. Tim Petzold is first author on ‘ Connexin 41.8 governs timely haematopoietic stem and progenitor cell specification’, published in BiO. Tim conducted the research described in this article while a PhD student in Julien Bertrand's lab at the Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland. He is now a postdoc in the lab of Holger Gerhardt at the Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, investigating developmental biology – previously his focus was on how blood stem cells develop and now it has shifted to how the vascular system develops
Tim Seibles, 40th Annual ODU Literary Festival
No full textTim Seibles is the author of several poetry collections including Hurdy-Gurdy, Hammerlock, Buffalo Head Solos, and Fast Animal, which was a finalist for the 2012 National Book Award. In 2013 he received both the Pen Oakland Josephine Miles Award for poetry and an honorary Doctorate of Humane Letters from Misericordia University for his literary accomplishments. His latest collection, One Turn Around the Sun, has just been released. Tim is the current Poet Laureate of Virginia and is a Professor of English at Old Dominion University where he teaches literature as well as classes in the MFA in writing program
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