275 research outputs found
Vicky Henderson
No full textthis paper. The second author is supported by an Advanced Fellowship from the EPSRC. The third author acknowledges partial financial support from DAAD, EPSRC and KW
Bayesian mixture estimation for perceptual grouping
No full textPerceptual grouping is the process by which a set of image elements is divided into distinct “objects” or components. In this dissertation I propose a Bayesian framework for understanding perceptual grouping, in which the goal of the computation is to estimate the organization that best explains the observed configuration of image elements. I formalize the problem of perceptual grouping as a mixture estimation problem, where it is assumed that the configuration of elements is generated by a set of distinct components (or ”objects”), whose underlying parameters one seeks to estimate. In the first part of this dissertation I will propose a simplified version of the framework and show how it can be used to estimate the number of objects, more specifically clusters of dots, present in the image. Across two experiments I show how the model gives an accurate and quantitatively precise account of subjects’ numerosity judgments, while at the same time outperforming more standard accounts for dot clustering. In the second part of the dissertation this simplified framework is expanded to estimate a hierarchical representation of the image elements. This framework can easily be adjusted to different subproblems of perceptual grouping. Here I will show how an instantiation of our framework for contour integration, part decomposition, and shape completion can account for several key perceptual phenomena and previously collected human subject data.Ph. D.Includes bibliographical referencesby Vicky Froye
Risk Factors for Prolonged Mechanical Ventilation and Weaning Failure: A Systematic Review
No full text<b><i>Introduction:</i></b> Prolonged mechanical ventilation (PMV) and weaning failure are factors associated with prolonged hospital length of stay and increased morbidity and mortality. In addition to the burden these places on patients and their families, it also imposes high costs on the public health system. The aim of this systematic review was to identify risk factors for PMV and weaning failure. <b><i>Methods:</i></b> The study was conducted according to PRISMA guidelines. After a comprehensive search of the COCHRANE Library, CINHAL, Web of Science, MEDLINE, and the LILACS Database a PubMed request was made on June 8, 2020. Studies that examined risk factors for PMV, defined as mechanical ventilation ≥96 h, weaning failure, and prolonged weaning in German and English were considered eligible; reviews, meta-analyses, and studies in very specific patient populations whose results are not necessarily applicable to the majority of ICU patients as well as pediatric studies were excluded from the analysis. This systematic review was registered in the PROSPERO register under the number CRD42021271038. <b><i>Results:</i></b> Of 532 articles identified, 23 studies with a total of 23,418 patients met the inclusion criteria. Fourteen studies investigated risk factors of PMV including prolonged weaning, 9 studies analyzed risk factors of weaning failure. The concrete definitions of these outcomes varied considerably between studies. For PMV, a variety of risk factors were identified, including comorbidities, site of intubation, various laboratory or blood gas parameters, ventilator settings, functional parameters, and critical care scoring systems. The risk of weaning failure was mainly related to age, previous home mechanical ventilation (HMV), cause of ventilation, and preexisting underlying diseases. Elevated PaCO<sub>2</sub> values during spontaneous breathing trials were indicative of prolonged weaning and weaning failure. <b><i>Conclusion:</i></b> A direct comparison of risk factors was not possible because of the heterogeneity of the studies. The large number of different definitions and relevant parameters reflects the heterogeneity of patients undergoing PMV and those discharged to HMV after unsuccessful weaning. Multidimensional scores are more likely to reflect the full spectrum of patients ventilated in different ICUs than single risk factors
Confronting Existential Dilemmas: An In-Depth Analysis of Vicky Cristina Barcelona through the Philosophies of Sartre and Camus
No full textIn this paper, the author analyzes Woody Allen's film Vicky Cristina Barcelona through an existential lens, drawing parallels with the philosophies of Jean-Paul Sartre and Albert Camus. The characters Vicky, Cristina, Juan Antonio, and María Elena embody existential dilemmas, exploring themes of individual freedom, choice, and the search for meaning in an indifferent world. The analysis delves into Sartrean concepts of bad faith and radical freedom, contrasting Vicky's societal conformity with Cristina's Camusian pursuit of meaning through experiences. The characters' interactions reflect the unpredictable and absurd nature of human relationships, echoing Camus's exploration of the absurdity of emotions. The non-linear narrative structure aligns with existential themes, emphasizing life's unpredictability, and Barcelona serves as a metaphor for the complexities of existence. Woody Allen's narrative and artistic choices invite viewers to reflect on the intricate interplay of love, desire, and chance encounters in the context of existentialism
From Pausanias to Baedeker and Trip Advisor: Textual proto-tourism and the engendering of tourism distribution channels
No full textThe key aim of this article is to provide an interdisciplinary look at tourism and its diachronic textual threads bequeathed by the ‘proto-tourist’ texts of the Greek travel author Pausanias. Using the periegetic, travel texts from his voluminous Description of Greece (2nd century CE) as a springboard for our presentation, we intend to show how the textual strategies employed by Pausanias have been received and still remain at the core of contemporary series of travel guides first authored by Karl Baedeker (in the 19th century). After Baedeker, Pausanias’ textual travel tropes, as we will show, still inform the epistemology of modern-day tourism; the interaction of travel texts with travel information and distribution channels produces generic hybrids, and the ancient Greek travel authors have paved the way for the construction of networks, digital storytelling and global tourist platforms
A Holding Space
No full textVicky Hunter is a Practitioner-Researcher and Professor in Site Dance at the University of Chichester,
UK. Her research explores site dance and corporeal engagements with space, place and lived
environments. Since 2004 she has presented site dance in a range of sites including basements,
woodlands and beaches. She is co-author of (Re) Positioning Site Dance: Local Acts, Global Themes (2019) with
Melanie Kloetzel and Karen Barbour, and editor of Moving Sites: Investigating Site-Specific Dance Performance
(Routledge, 2015). Her monograph Site, Dance and Body: Movement, Materials and Corporeal Engagement was
published by Palgrave in 2021
The real costs of Open Source Sustainability
No full textIn 2016 Nadia Eghbal released "Roads and Bridges: The Unseen Labor Behind Our Digital Infrastructure," which shines a light on how few people maintain the software that underpins a large amount of the internet and the services that run on it.
The software world has rallied around Open Source Sustainability. Going with what they know, folks mostly focus on paying FOSS developers. Funding drives were funded. Foundations were founded. Startups started up. Venture capitalists ventured that capital.
Money isn't the only part of sustainable FOSS projects. Sustainability is a multi-faceted concept that can't work if people focus on only one of its many elements.
This talk will:
Review literature around the concept of sustainability
Propose a definition that more accurately details what "sustainable" means to FOSS
Provide tips for starting with your FOSS sustainability efforts
About the speaker
VM (aka Vicky) spent most of her twenty-plus years in the tech industry leading software development departments and teams, providing technical management and leadership consulting for small and medium businesses, and helping companies understand, use, release, and contribute to free and open source software in a way that's good for both their bottom line and for the community. Now, as the Director of Open Source Strategy for Juniper Networks, she leverages her nearly 30 years of free and open source software experience and a strong business background to help Juniper be successful through free and open source software.
She is the author of Forge Your Future with Open Source, the first and only book to detail how to contribute to free and open source software projects. The book is published by The Pragmatic Programmers and is now available at https://fossforge.com.
Vicky has been a moderator and author for opensource.com, an author for Linux Journal, the Vice President of the Open Source Initiative, and is a frequent and popular speaker at free/open source conferences and events. She's the proud winner of the Perl White Camel Award (2014), the O’Reilly Open Source Award (2016), and two Opensource.com Moderator's Choice Awards (2018, 2019). She blogs about free/open source, business, and technical management at {anonymous => 'hash'};.</p
PARTHENOS Training Suite: Introduction to Research Infrastructures
No full textIntroduction to Research Infrastructures
PARTHENOS
Archived snapshot of the ‘Introduction to Research Infrastructures’ module, which is part of the PARTHENOS Training suite [1], which was developed as part of Work Package 7 in the PARTHENOS project [2].
By the end of this module, learners should be able to:
Understand the elements of common definitions of research infrastructures
Be able to discuss the importance of issues such as sustainability and interoperability
Understand how research infrastructure supports methods and communities
Be aware of some common critiques of digital research infrastructures in the Humanities.
Background:
The PARTHENOS project [3] recognised that over the past ten years, researchers, institutional leaders and policymakers have begun to speak more and more about infrastructure. As more voices join the conversation, however, it can sometimes become more difficult, rather than less, to understand what exactly research infrastructure is and does. In particular in the humanities, and the digital humanities, the term is used to cover a lot of different projects, resources and approaches.
To address this gap, the PARTHENOS cluster of humanities research infrastructure projects devised a series of training modules and resources for researchers, educators, managers, and policy makers who want to learn more about research infrastructures and the issues and methods around them.
The modules, which have been released on a rolling basis from late 2016, cover a wide range of awareness levels, requirements and topic areas within the landscape of research infrastructure.
This deposit is never intended to replace the online version of the training material on the PARTHENOS website, and is intended as an archive of content.
Except where otherwise noted, PARTHENOS content is licensed under a Creative Commons Attribution 4.0 International license CC BY-NC 4.0.
[1] https://training.parthenos-project.eu/
[2] WP7 – Skills, Professional Development and Advancement: http://www.parthenos-project.eu/resources/projects-deliverables#1523355756261-be477222-2866
[3] http://www.parthenos-project.eu/
[This is an archived snapshot of an online course. The online course may be updated over time, and though new versions will be created to reflect major changes, the archived version may not match exactly the content of the online version]
Supplementary materials:
Videos:
https://youtu.be/p_BfZKgKxkg
https://youtu.be/StPtEJYeWnE
https://youtu.be/QQVNuiMdwrA
https://youtu.be/kNLDAZkG6v8
https://youtu.be/om8CYJU-FS0
https://youtu.be/ZfTHPbDTX1Y
https://youtu.be/97qS3JYg2XU
https://youtu.be/BNaH4xAY7Dg
https://youtu.be/uFgGp9uF51c
https://youtu.be/FsD11GvmSLg
https://youtu.be/NjgSWP635ew
https://youtu.be/bFWLD8qow04
https://youtu.be/RoeziZ3PqW4
https://youtu.be/kDEXWrLnisY
https://youtu.be/sRLot1Bw-KM
https://youtu.be/FsD11GvmSLg
https://youtu.be/NjgSWP635ew
https://youtu.be/bFWLD8qow04
https://youtu.be/rfkE1se-c5Y
https://youtu.be/RoeziZ3PqW4
https://youtu.be/kDEXWrLnisY
https://youtu.be/sRLot1Bw-KM
THIRD PARTY:
Images:
Detail from the Pioneer plaque. Author: NASA Ames: https://solarsystem.nasa.gov/internal_resources/709
How Standards Proliferate. Author: xkcd.com: https://imgs.xkcd.com/comics/standards.png
Videos
What is CLARIN. Author: CLARIN: https://youtu.be/sYaLv5ib4N
The Workload process with a Poisson cluster input can look like a Fractional Brownian motion even in the slow growth regime
No full textThe workload process with a Poisson cluster input can look like a Fractional Brownian motion even in the slow growth regime
Vicky Fasen_and Gennady Samorodnitsky ?
May 20, 2008
Abstract
We show that, contrary to the common wisdom, the workload process in a _uid queue with
a cluster Poisson input can converge, in the slow growth regime, to a Fractional Brownian
motion, and not to a L?vy stable motion. This emphasizes lack of robustness of L?vy stable
motions as _bird-eye_ descriptions of the tra_c in communication networks.
AMS 2000 Subject Classi_cations: primary: 90B22 secondary: 60F17
Keywords: cluster Poisson process, _uid queue, Fractional Brownian motion, slow growth regime, scaling limit, workload process
? Center for Mathematical Sciences, TU M?nchen, D-85747 Garching, Germany, email: [email protected]. Parts of the paper were written while the _rst author was visiting the Department of Operations Research and Information Engineering at Cornell University. Financial support from the Deutsche Forschungsgemeinschaft through a research grant is gratefully acknowledged.
?School of Operations Research and Information Engineering, Cornell University, Ithaca, NY 14853, email:
[email protected]. Samorodnitsky's research was partially supported by an NSA grant MSPF-05G-049 and an ARO grant W911NF-07-1-0078 at Cornell University
Whose Voice? Tim Crouch’s The Author and Active Listening on the Contemporary Stage
No full textThe essay discusses Tim Crouch’s recent play The Author (2009) in the context of active listening, audience participation, response and responsibility in contemporary theatre. It provides a critical engagement with the spectatorial experience of the piece so as to problematize the multiple uses of the physical medium of voice and speech in a contemporary play that delivers a fresh angle to narrativity and metatheatricality. At the same time, the essay probes the varied range of possibilities but also realistic extent of audience involvement in the play, tracing its deep textual contingencies to produce an overall understanding of the equally rewarding and precarious interrelationship between performance piece and audience.</p
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