Search results for "Communication system"
showing 10 items of 139 documents
Categorizing networked services The role of intrinsic-, user network- and complement network attributes
2009
PurposeThis paper aims to investigate the properties and attributes of networked services and to propose a general categorization scheme for such services.Design/methodology/approachTwo separate studies were conducted to test the validity and applicability of the categorization scheme. First, industry experts categorized a set of pre‐selected mobile services based on the services' dominant source of value. Second, a large‐scale end‐user study of the same services was conducted for testing cross‐service differences between the proposed service categories in terms of what drives perceived customer value. It is argued that services can be categorized on the basis of whether their dominant sour…
Antecedents to permission based mobile marketing: an initial examination
2009
PurposeThis paper's aim is to develop a conceptual model to examine the influence of four antecedent factors (personal trust, institutional trust, perceived control and experience) on consumers' willingness to participate in permission‐based mobile marketing. The model is to be tested empirically across three European countries and gender.Design/methodology/approachData are collected from surveys of consumers in Finland, Germany and the UK. The partial least squares (PLS) approach is utilised to test the model fit.FindingsThe main factor affecting the consumers' decision to participate in mobile marketing is institutional trust, which is a significant factor in all three countries and acros…
Modeling of Vehicle-to-Vehicle Channels in the Presence of Moving Scatterers
2012
In this paper, we derive a vehicle-to-vehicle~(V2V) channel model assuming a typical propagation scenario in which the local scatterers move with random velocities in random directions. The complex channel gain of the proposed V2V channel model is provided. Subsequently, for different scatterer velocity distributions, the corresponding autocorrelation functions~(ACFs) are derived, illustrated, and compared with the classical ACF derived under the assumption of fixed scatterers. Furthermore, under specific conditions, highly accurate approximations for the ACFs are provided in closed form. Since the proposed V2V channel model covers several communication scenarios as special cases, including…
Streaming for vehicular users via elastic proxy buffer management
2004
In this article we refer to the market of vehicular networks, where groups of customers located in the same public vehicle (e.g., a train or bus) connect to a terrestrial network through a wireless/satellite backbone link. Elastic buffering is a proxy management technique devised to decouple the multimedia information retrieval rate on the network backbone from the playout streaming rate at the user terminal. It has been shown in the past that the application of elastic buffering mechanisms in terrestrial networks brings significant advantages in terms of network effectiveness. We show that elastic buffering is an extremely effective means to reduce, or even eliminate, streaming service out…
Stakeholders, contradictions and salience: An empirical study of a Norwegian G2G effort
2006
Author's version of a chapter in Proceedings of the 39th Annual Hawaii International Conference on Systems Sciences. Also available from the publisher at http://dx.doi.org/10.1109/HICSS.2006.436 Previous studies indicate that the expected effects of e-Government are slower to realize than initially expected. Several authors argue that e-Government involves particularly complex settings, consisting of a variety of stakeholders promoting different and often conflicting objectives. Yet, few studies have explicitly addressed the inherent challenges of this complexity. This study focuses on the extent to which contradictory stakeholder objectives can help explain the relatively slow progress of …
A Rule-Based Multi-agent System for Road Traffic Management
2009
Road Traffic presents a high dynamism which makes necessary the development of traffic management and control strategies to improve traffic flows and more important, road safety. This dynamism makes necessary the use of intelligent systems to support traffic organizations and road operators to cope with incidents. In this paper we introduce a new expert system to support traffic management when weather problems occur in the road network. The system uses multiagent technology to work with the specific characteristics of traffic domain and is able to work in two modes: a) coordinately, where all the agents works to solve problems in large networks and b) locally where due to communications pr…
All-optical measurements of background, amplitude, and timing jitters for high speed pulse trains or PRBS sequences using autocorrelation function
2008
International audience; We present a simple method for all-optical measurements of background, amplitude, and timing jitters of ultra high speed pulse trains or PRBS sequences using the jitter dependence of the intercorrelation-peak shape. This method is numerically and experimentally demonstrated on a 42.66 Gbit/s PRBS sequence and then applied to measure the jitter growths occurring during the propagation of a 160-GHz pulse train in a classical SMF/DCF dispersion map.
Turning a new “page”: ways to decrease the number of pages after hours without compromising patient care
2020
Pages to house staff after hours, especially overnight, lead to interrupted sleep and fatigue the next day. Although some pages are urgent, others may not need an immediate response. In this study we aimed to identify unwarranted pages and to establish ways to reduce them.Over 2 months, all pages to the Department of Pediatric Urology at the Hospital for Sick Children in Toronto, Canada, during call hours were documented, including the assessment of the responding physicians of their medical necessity. After analyzing the reasons for inappropriate pages, we took several steps to try to reduce them without impairing patient care. One year later, pages were tracked again to evaluate the effic…
Correlation and Spectral Properties of Vehicle-to-Vehicle Channels in the Presence of Moving Scatterers
2013
This paper derives a vehicle-to-vehicle (V2V) channel model assuming a typical propagation scenario in which the local scatterers move with random velocities in random directions. The complex channel gain of the proposed V2V channel model is provided. Subsequently, for different scatterer velocity distributions, the corresponding autocorrelation function (ACF), power spectral density (PSD), and the Doppler spread of the channel are derived, shown, and confirmed by the available measurement data. It is shown that the Gaussian mixture (GM) and the exponential distribution can accurately describe the velocity distribution of relatively fast and slow moving scatterers, respectively. Since the p…
Social capital and the networked public sphere: Implications for political social media sites
2012
Submitted version of a paper from the 45th Hawaii International Conference on System Science (HICSS), 2012. Published version available from IEEE: http://dx.doi.org/10.1109/hicss.2012.535 This paper presents a theoretical lens for research on social media use in eParticipation, along with an example case study. The idea of the public sphere and how it can be applied to eParticipation research is presented. The public sphere is discussed in relation to Castell's notion of the network society as the "networked public sphere", and social capital is introduced as a possible explanation for why some people choose to participate while others refrain from doing so. An example case is presented and…