Search results for "DCA"
showing 10 items of 188 documents
“Vendor-Affected” WLAN experimental results: A Pandora’s Box?
2008
Experimental results are typically envisioned as the ultimate validation reference for any theoretical and/or simulation modelling assumptions. However, in the case of Wireless LANs, the situation is not nearly as straightforward as it might seem. In this paper, we discuss to what (large) extent measurement results may depend on proprietary undocumented algorithms implemented in the vendor-specific card/driver employed. Specifically, we focus on the experimental study of IEEE 802.11 b/g outdoor links based on the widely used Atheros/MADWiFi card/driver pair. We show that unexpected performance divergences do emerge in two classes of comparative experiments run on a same outdoor link: broadc…
Joint Resource Allocation and UAV Scheduling With Ground Radio Station Sleeping
2021
Applications of Unmanned aerial vehicles (UAVs) have advanced rapidly in recent years. The UAVs are used for a variety of applications, including surveillance, disaster management, precision agriculture, weather forecasting, etc. In near future, the growing number of UAV applications would necessitate densification of UAV infrastructure (ground radio station (GRS) and ground control station (GCS)) at the expense of increased energy consumption for UAV communications. Maximizing the energy efficiency of this UAV infrastructure is important. Motivated by this, we propose joint resource allocation and UAV scheduling with GRS sleeping (GRSS). Further, we propose the use of coordinated multi-poi…
A socio-ecological approach to physical activity interventions in childcare: a systematic review
2014
The promotion of physical activity (PA) in young children requires effective interventions. This article reviews the evidence on PA interventions in childcare by applying a socio-ecological approach. A computer-based literature search for intervention studies aimed at increasing children's PA levels was run across four databases: SPORTDiscus, ISI Web of Science, PsycINFO and ERIC. The participants had to be in childcare, aged 2-6-year-old, and their pre- and post- intervention PA levels measured. Selection was restricted to peer-reviewed publications and to studies conducted in childcare settings. Twenty-three studies met the inclusion criteria and their methodological quality was assessed.…
Ambush Marketing in China: Counterbalancing Olympic Sponsorship Efforts
2008
This paper provides an empirical insight into the perception and use of ambush marketing on the People's Republic of China public television network CCTV5 (the official Olympic broadcaster), by examining the commercials used by various corporations during its coverage of the 2004 Olympic Games in Athens. A five-point categorization is presented to distinguish between various methods of ambushing. Despite the efforts of the Beijing government to fight ambush marketing ahead of its Olympic Games in 2008, the results demonstrate that concerns about the practice of ambush marketing in China must be taken seriously. An analysis of 40 commercial spots was carried out, based on China's 2002 Olympi…
Terapia gruppo-analitica
2006
Il lavoro propone i risultati di una ricerca sulla valutazione empirica di una psicoterapia di gruppo costruita nello spirito di un’osservazione complessa, che aiutasse a mettere in luce molteplici sfaccettature del processo terapeutico e che consentisse una conoscenza non riduttiva dell’esperienza terapeutica stessa. L’attenzione della ricerca è stata rivolta, oltre che ai percorsi terapeutici dei singoli pazienti, allo specifico dispiegarsi dei processi gruppali, alla possibilità di aumentare la comprensione su come tali processi si caratterizzano ed evolvono nel tempo. Oggetti dell’indagine sono stati: l’esplorazione del processo di gruppo, ed in particolare la configurazione della matri…
Measurement of subpubic arch angle by three-dimensional transperineal ultrasound and impact on vaginal delivery
2015
Objectives To assess whether antepartum measurement of the subpubic arch angle (SPAA) as a parameter of the bony pelvic outlet can predict vaginal delivery. Methods Between January 2007 and June 2011, 625 nulliparous women with a singleton pregnancy were recruited from the antenatal clinic to be interviewed and have a four-dimensional transperineal ultrasound examination. Ultrasound examinations were performed between 34 and 36 weeks of gestation. Volume ultrasound data were saved for offline analysis, blinded against all other data. The SPAA was measured in the axial plane and logistic regression analysis was used to examine the association between SPAA and outcomes of vaginal delivery vs …
AGILE 3+ Score for the Diagnosis of Advanced Fibrosis and for Predicting Liver-related Events in NAFLD.
2022
Background & aims: We aimed to assess the diagnostic accuracy of AGILE 3+, a recently developed score based on the combination of aspartate aminotransferase/alanine aminotransferase ratio, platelet count, diabetes status, sex, age, and liver stiffness measurement (LSM) by transient elastography, when compared with Fibrosis-4 (FIB-4) and LSM, for the diagnosis of advanced fibrosis and for the prediction of liver-related events (LREs) occurrence in patients with NAFLD. Methods: A total of 614 consecutive patients with biopsy-proven NAFLD or clinical diagnosis of NAFLD-related compensated cirrhosis were enrolled. LREs were recorded during follow-up. FIB-4, LSM by transient elastography (Fi…
A System of Indicators for Evaluating Public Broadcasting Corporations
2018
We describe an operational procedure to build an integrated information system (IIS) for monitoring and evaluating the performance of public broadcasting corporations (PBC). The procedure grounds in a conceptual framework derived from evaluation models, and consists of two stages. The first stage is the selection, through expert judgment, of simple indicators that illustrate the most relevant aspects of the corporations. The second stage is the definition of a system of indicators related to each level of the hierarchy of objectives planned by the corporations. The system of indicators has two levels. The first level is a basic indicator system that allows description and monitoring of the …
Une histoire de la classe ouvrière, podcast de l'émission "Entendez-vous l'éco ?"
2021
Comprendre l'histoire de la classe ouvrière, qui a joué un rôle structurant dans l'animation des structures productives françaises jusqu'aux grands mouvements de désindustrialisation des années 1980. Emission "Entendez-vous l'éco ?" de France Culture enregistrée lors des Rendez-vous de l'Histoire à Blois en octobre 2021. Animée par par Tiphaine de Rocquigny avec Anne-Sophie Bruno, Judith Rainhorn et Xavier Vigna.
Cinema audiences reproducibly vary the chemical composition of air during films, by broadcasting scene specific emissions on breath
2016
AbstractHuman beings continuously emit chemicals into the air by breath and through the skin. In order to determine whether these emissions vary predictably in response to audiovisual stimuli, we have continuously monitored carbon dioxide and over one hundred volatile organic compounds in a cinema. It was found that many airborne chemicals in cinema air varied distinctively and reproducibly with time for a particular film, even in different screenings to different audiences. Application of scene labels and advanced data mining methods revealed that specific film events, namely “suspense” or “comedy” caused audiences to change their emission of specific chemicals. These event-type synchronou…