168 research outputs found
Factors Influencing the Quality of the User Experience in Ubiquitous Recommender Systems
The use of mobile devices and the rapid growth of the internet and networking
infrastructure has brought the necessity of using Ubiquitous recommender
systems. However in mobile devices there are different factors that need to be
considered in order to get more useful recommendations and increase the quality
of the user experience. This paper gives an overview of the factors related to
the quality and proposes a new hybrid recommendation model.Comment: The final publication is available at www.springerlink.com
Distributed, Ambient, and Pervasive Interactions Lecture Notes in Computer
Science Volume 8530, 2014, pp 369-37
Suburbanization: A Post World War II Phenomenon in the Athens Metropolitan Area, Greece
This article studies the phases of urban development in Athens, the biggest metropolitan center of the country, in combination with the development of the Greek economy during the post world war II era, by applying techniques suggested by the theory of spatial cycle. Before application, an extended reference to the theoretical background will be presented, so that a comprehensive view of the spatial cycle hypothesis is established. Ă short historical analysis of the Greek economy will also be provided, so that the impact of several historical factors on the recent evolution of Athens Metropolitan Area be better understood. Since the beginning of the post-war period, the Athens Metropolitan Area has been going through a certain phase, i.e. the phase of suburbanization. Recently (1981-2001) the afore-mentioned area has shifted from the first stage of this phase to the second, i.e. from relative to absolute decentralization, facing not only a complete loss of core city population but also memorisation, unemployment and other depressive phenomena. As differences among western, southern or northern suburbs appear, an intra-suburb analysis will be carried out in order to identify the direction of urban evolution through time. The recent decline in the development of suburbs, in juxtaposition with the rapid emergence of some independent urban areas outside the Athens Metropolitan Area, provides some evidence of potential movement towards the next phase of disurbanization in the near future.
DESIGN AND IMPLEMENTATION OF MOBILE NEWS SERVICES: SUPPORTING SOCIAL NETWORKING FEATURES
This paper discusses and implements features both for a mobile Web and for a mobile native application, capable to provide news services enriched with indicative social networking elements. The objective was to facilitate the involvement of mobile users to produce and upload new content on the News Website and to facilitate their participation in the promotion and evaluation of the existing content. A significant addition was the implementation of an application for the automatic storing of articles derived from external sources, such as RSS/Atom feeds and emails. The results of our work are primarily related with the investigation and understanding of serious technical challenges, as well as the eventual development of proper solutions regarding the support of the âparticipative relationâ of mobile users with news-oriented Web content
The Regulatory Framework For Wireless Power Transfer Systems
A survey of the regulatory framework pertinent to Wireless Power Transfer systems is given. Both technical (power and frequency) considerations along with health safety radiation compliance are examined. A primer on regulatory processes is also included to facilitate the understanding of the developments. The current state is analysed and ongoing regulatory activities across the globe are discussed. Furthermore, a review of recent radiation safety studies of WPT systems is included
A dynamic multi-level collaborative filtering method for improved recommendations
One of the most used approaches for providing recommendations in various
online environments such as e-commerce is collaborative filtering. Although,
this is a simple method for recommending items or services, accuracy and
quality problems still exist. Thus, we propose a dynamic multi-level
collaborative filtering method that improves the quality of the
recommendations. The proposed method is based on positive and negative
adjustments and can be used in different domains that utilize collaborative
filtering to increase the quality of the user experience. Furthermore, the
effectiveness of the proposed method is shown by providing an extensive
experimental evaluation based on three real datasets and by comparisons to
alternative methods
Can e-Government applications contribute to performance improvement in public administration?
Electronic Government applications have been the focus of hundreds of local and national government administrations all over the world during the past decade. The emphasis of most of these applications lies in their effort to improve the experience of the user in interacting with public administration services and to minimise waiting times in completing transactions public services and citizens. Early applications were relying mainly on the speed and simplicity of submitting a request by the user while most of the work beyond the web based interaction was carried out as in the era before the introduction of the web based applications. The benefits from such endeavours have been short lived as citizens are looking for real enhancements in the way public administration serves their needs and responds to their requests. The authors argue that for e-government applications to succeed, considerable changes in the way public administration organizes itself and how it utilizes information management systems to respond to user / citizen requirements including and addressing the goals of all stakeholders involved are required. Currently the number of successful applications to that end is quite low when compared to the projects implemented and the resources invested in such systems so far. The authors propose steps that would maintain the focus of future implementations in doing so. They also identify the next steps for research in addressing this complex and ever evolving issue
Web services for rural areasâSecurity challenges in development and use
Web services (WS) are the modern response of traders and online service providers to satisfying the
increasing needs and demands of the digital communities. WS formation and operation is based on a
software system designed to support interoperable machine-to-machine interaction over a network.
Security is of paramount importance to WS and the ability to measure and evaluate the level of security
available is key to establishing and continuing to develop the level of trust based on reputation developed
by the provider of the WS. The greatest challenge in offering secure WS is to groups of people where the
level of expertise of the user is low and the need for transparency of the service provision quite high, such
as the case with services offered primarily to people in rural areas. Providers of such services face many
challenges in balancing the requirements for performance, interoperability, and security against the cost
of implementing secure systems and running profitable operations through low income generating WS.
A review of services offered, of the users and the challenges in building online trust among providers and
users are discussed for the case of rural areas in the United Kingdom
Web services security evaluation considerations
Web services development is a key theme in utilisation of the
commercial exploitation of the semantic web. Paramount to the development
and offering of such services is the issue of security features and the way these
are applied in instituting trust amongst participants and recipients of
the service. Implementing such security features is a major challenge to
developers as they need to balance these with performance and interoperability
requirements. Being able to evaluate the level of security offered is a desirable
feature for any prospective participant. The authors attempt to address the
issues of security requirements and evaluation criteria, while they discuss the
challenges of security implementation through a simple web service application
case
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