Forty years of computers and education : A roller-coaster relationship

For forty years the relationship between computers and education has been engaged in a headlong journey, full of ups and downs, wild swerves to right and left, somehow both exhilarating and frightening, sometimes in tandem but at others barely still holding hands. The engine of the technologies keeps changing while the driver is sometimes a discipline, learners, or the teacher. The landscape passed along the way includes fleeting glimpses of beautiful but unconquerable mountains followed by attractive rivers with treacherous currents. The population is sometimes persuaded by innovators to come along for the ride, and then suddenly they embark on their own journey into an entirely different valley. The paper analyses this journey along the TC3 twin track of education with and about information and communication technologies, using evidence from its publications and debates, organisational structure and the influence of individuals. The presentation, from one who is neither a computer scientist nor mathematician, will aim to portray a particular perspective on this roller-coaster relationship.2nd IFIP Conference on the History of Computing and EducationRed de Universidades con Carreras en Informática (RedUNCI

Aerial-terrestrial communications: terrestrial cooperation and energy-efficient transmissions to aerial-base stations

Hybrid aerial-terrestrial communication networks based on low-altitude platforms are expected to meet optimally the urgent communication needs of emergency relief and recovery operations for tackling large-scale natural disasters. The energy-efficient operation of such networks is important given that the entire network infrastructure, including the battery-operated ground terminals, exhibits requirements to operate under power-constrained situations. In this paper, we discuss the design and evaluation of an adaptive cooperative scheme intended to extend the survivability of the battery-operated aerial-terrestrial communication links. We propose and evaluate a real-time adaptive cooperative transmission strategy for dynamic selection between direct and cooperative links based on the channel conditions for improved energy efficiency. We show that the cooperation between mobile terrestrial terminals on the ground could improve energy efficiency in the uplink, depending on the temporal behavior of the terrestrial and aerial uplink channels. The corresponding delay in having cooperative (relay-based) communications with relay selection is also addressed. The simulation analysis corroborates that the adaptive transmission technique improves overall energy efficiency of the network whilst maintaining low latency, enabling real-time applications

Telematics for community portal development.

Community portals emanate from information and communication technology (ICT) applied to community networking, enabling citizens to access information and services on-line. These telematic portal systems are now deployed globally, facilitating information services to geographic and virtual communities. The context of this research study is one of community portals deployed by UK government local authorities for citizen service interactions. To date there have been few studies that holistically and longitudinally examine the subject of community portals. The 5 year research exercise has been undertaken as a qualitative study using an interpretivist approach and methodology derived > from context-process analysis. The approach was influenced by Mumford’s writings on ‘people and technology' and Schuler’s early work on community network development in the USA. Data collection was undertaken using a national survey questionnaire and qualitative techniques including interviews and mini-case studies. Findings of the research include a new categorisation of community portals into two distinctive types of Civic and Civil portal. Theoretical outcomes include an improved understanding of the methodological, technical, and social dimensions of portal development and deployment. The implications for management include an exposition of the issues involved in community portal development and the important need for citizen engagement in the process. A case study of Blackpool, (and mini case studies of five civic / civil portals), point to lack of collaboration between central and local government portal architects and developers

Web Content Search and Adaptation for IDTV: One Step Forward in the Mediamorphosis Process toward Personal-TV

We are on the threshold of a mediamorphosis that will revolutionize the way we interact with our TV sets. The combination between interactive digital TV (IDTV) and the Web fosters the development of new interactive multimedia services enjoyable even through a TV screen and a remote control. Yet, several design constraints complicate the deployment of this new pattern of services. Prominent unresolved issues involve macro-problems such as collecting information on the Web based on users' preferences and appropriately presenting retrieved Web contents on the TV screen. To this aim, we propose a system able to dynamically convey contents from the Web to IDTV systems. Our system presents solutions both for personalized Web content search and automatic TV-format adaptation of retrieved documents. As we demonstrate through two case study applications, our system merges the best of IDTV and Web domains spinning the TV mediamorphosis toward the creation of the personal-TV concept

Data collection of mobile sensor networks by drones

Data collection by autonomous mobile sensor arrays can be coupled with the use of drones which provide a low-cost, easily deployable backhauling solution. These means of collection can be used to organize temporary events (sporting or cultural) or to carry out operations in difficult or hostile terrain. The aim of this thesis is to propose effective solutions for communication between both mobile sensors on the ground and on the edge-to-ground link. For this purpose, we are interested in scheduling communications, routing and access control on the sensor / drone link, the mobile collector. We propose an architecture that meets the constraints of the network. The main ones are the intermittence of the links and therefore the lack of connectivity for which solutions adapted to the networks tolerant to the deadlines are adopted. Given the limited opportunities for communication with the drone and the significant variation in the physical data rate, we proposed scheduling solutions that take account of both the contact time and the physical flow rate. Opportunistic routing is also based on these two criteria both for the selection of relay nodes and for the management of queues. We wanted to limit the overhead and propose efficient and fair solutions between mobile sensors on the ground. The proposed solutions have proved superior to conventional scheduling and routing solutions. Finally, we proposed a method of access combining a random access with contention as well as an access with reservation taking into account the aforementioned criteria. This flexible solution allows a network of dense mobile sensors to get closer to the performance obtained in an oracle mode. The proposed solutions can be implemented and applied in different application contexts for which the ground nodes are mobile or easily adapted to the case where the nodes are static