Search results for "broadcasting"

“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…

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…

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 …

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…

Toward 3D integral-imaging broadcast with increased viewing angle and parallax

2018

Abstract We propose a new method for improving the observer experience when using an integral monitor. Our method permits to increase the viewing angle of the integral monitor, and also the maximum parallax that can be displayed. Additionally, it is possible to decide which parts of the 3D scene are displayed in front or behind the monitor. Our method is based, first, in the direct capture, with significant excess of parallax, of elemental images of 3D real scenes. From them, a collection of microimages adapted to the observer lateral and depth position is calculated. Finally, an eye-tracking system permits to determine the 3D observer position, and therefore to display the adequate microim…

Quantitative analysis of the plurality in news programs of Nou at the last stage

2016

Durante los cerca de siete meses en los que Rosa Vidal y su nuevo equipo dirigieron RTVV, se produjo un cambio de tendencia en los informativos. Unos espacios de programación —vitales para una televisión pública— que habían perdido totalmente el prestigio y la audiencia después de 24 años de historia, la mayor parte de ellos bajo el poder político del Partido Popular. Esa última época convulsa coincidió en el tiempo con la aplicación de un expediente de regulación de empleo que el Tribunal Superior de Justicia de la Comunitat Valenciana anularía, provocando la decisión de acabar con las emisiones de la televisión autonómica. También por entonces se puso en marcha el Mandato-marco y el Contr…

Wheeze and asthma in children: associations with body mass index, sports, television viewing, and diet.

2008

Obesity, physical activity, and dietary habits are distinct but strongly interrelated lifestyle factors that may be relevant to the prevalence of wheeze and asthma in children. Our goal was to analyze the relationship of body mass index (BMI), regular sports participation, TV viewing, and diet with current wheezing and asthma.We investigated 20,016 children, aged 6-7 years, who were enrolled in a population-based study. Parents completed standardized questionnaires. Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs), while adjusting for several confounders and simultaneously considering BMI, regular sports activity, TV viewing and selected dietary …

LES investigation of heat and mass exchange in channel induction furnaces

2009

Field Measurements and Parameter Calibrations of Propagation Model for Digital Audio Broadcasting in Norway

2018

During 2017, digital audio broadcasting (DAB) replaces frequency modulation (FM) broadcasting and becomes the only technology for national terrestrial audio broadcasting services in Norway. As Norway is the first country that replaces FM completely with DAB, it is of great importance to measure the signal strength of such a technology in massive deployments and to tune a simulation model as a reference for future studies. Therefore, field measurements of received signal strength are carried out in a typical Norwegian area in this work. Based on the data obtained from the measurements, a simulator with a recent empirical propagation model, namely, ITU-R P.1546-5, has been calibrated. The fin…