共查询到11条相似文献,搜索用时 0 毫秒
1.
Thai-Lai Pham Georg Schneider Stuart Goose Arturo Pizano 《Personal and Ubiquitous Computing》2001,5(1):25-28
Contemporary small screen devices are used as personal companion or communication devices. However, their physical dimensions
constrain the processing, communication and user interface capabilities. Thus, rich content presentation and diverse service
access via small screen appliances is limited accordingly. This paper introduces the Composite Device Computing Environment
(CDCE) that provides a framework for dynamically detecting and utilising surrounding computing resources to overcome the small
screen device limitations. CDCE includes the communication infrastructure in addition to supporting alternative models for
interactivity between small screen clients and surrounding computing resources. 相似文献
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Advances in mobile devices and wireless telecommunication infrastructure already provide mobile users with access to online
information sources and services. Compared to the PC world, however, mobile access is still quite restricted, especially with
regard to the display of graphical representations, such as images, drawings, diagrams, maps and logos. Since graphical representations
are increasingly used in the World Wide Web for the purpose of information presentation, the adaptation of graphics for tiny
displays is a challenge that should not be neglected. The current contribution discusses several transformation approaches
which might be employed to accomplish this adaptation task. 相似文献
4.
Leopoldina Fortunati 《Personal and Ubiquitous Computing》2001,5(2):85-98
This paper analyses the shifting identity of the mobile phone in the light of research carried out in 1996 on a representative
population sample from five major European countries: Italy, UK, France, Germany and Spain. A total of 6609 people were interviewed
by means of a telephone survey. The mobile phone emerged as a charismatic technology compared to other mobile technologies
(laptop and car phone) and as a leading technology that, in just a few years, has appropriated 11% of total telephone traffic.
It has “dragged” its widespread presence and amount of use from the workplace to the domestic sphere, although in Italy, where
it has had greatest success, its widespread use has been detached from its use in the workplace. Another emerging result is
that the use of the mobile phone is not correlated to strong residential mobility in individuals. 相似文献
5.
User and Concept Studies as Tools in Developing Mobile Communication Services for the Elderly 总被引:1,自引:0,他引:1
M. Mikkonen S. Va¨yrynen V. Ikonen M. O. Heikkila¨ 《Personal and Ubiquitous Computing》2002,6(2):113-124
The basis of this study was the ageing of the population all over the world. The study concentrated on finding out the key
service needs of elderly people. The service needs from the end users’ as well as the experts’ perspective were gathered by
means of various group methods such ideation sessions. Four mobile communication service concepts were created using these
groups’ opinions. After diverse communication, these concepts were tested by the elderly. The research methods comprised a
user study and a concept study.
Based on the results, the needs could be prioritised. Additionally, the main trend of the results confirmed the opinions
presented in the literature. One important finding was the positive opinions about additional value of wireless devices and
services. This knowledge can be used in mobile communication product development. Most of the elderly are ready to accept
new forms of mobile communication service. Ease of use and actual need of the services are important criteria. The elderly
are ready to begin using the services as long as they truly facilitate independent living. 相似文献
6.
Scenarios in HCI are widely used and discussed as written or visual narratives. In this paper, we discuss fruitful conditions
for the creation and performance of scenarios particularly for the concept design of mixed realities or wireless devices.
Designers are attempting new ways of engaging people in design and experiencing ideas in early design phases. Examples range
from exploring scenarios using mock-ups or Wizard-of-Oz techniques, to testing scenarios with prototypes. In our design projects,
scenarios were created and performed with participants following them in their daily activities. Discussing these sessions,
which we called SPES (Situated and Participative Enactment of Scenarios), we highlight as promising conditions to create scenarios:
the everyday life as a stage and the opportunity for participants to exercise reflection-in-action. 相似文献
7.
Wee Teck Ng Peter M. Chen 《The VLDB Journal The International Journal on Very Large Data Bases》1998,7(3):194-204
Recent results in the Rio project at the University of Michigan show that it is possible to create an area of main memory
that is as safe as disk from operating system crashes. This paper explores how to integrate the reliable memory provided by
the Rio file cache into a database system. Prior studies have analyzed the performance benefits of reliable memory; we focus
instead on how different designs affect reliability. We propose three designs for integrating reliable memory into databases:
non-persistent database buffer cache, persistent database buffer cache, and persistent database buffer cache with protection.
Non-persistent buffer caches use an I/O interface to reliable memory and require the fewest modifications to existing databases.
However, they waste memory capacity and bandwidth due to double buffering. Persistent buffer caches use a memory interface
to reliable memory by mapping it into the database address space. This places reliable memory under complete database control
and eliminates double buffering, but it may expose the buffer cache to database errors. Our third design reduces this exposure
by write protecting the buffer pages. Extensive fault tests show that mapping reliable memory into the database address space
does not significantly hurt reliability. This is because wild stores rarely touch dirty, committed pages written by previous
transactions. As a result, we believe that databases should use a memory interface to reliable memory.
Received January 1, 1998 / Accepted June 20, 1998 相似文献
8.
When multimedia information is transported over a packet-switched network, the quality of presentation can be degraded due
to network delay variation or jitter. This paper presents a dejittering scheme that can be used in the transport of MPEG-4
and MPEG-2 video to absorb any introduced network jitter, thus preserving the presentation quality of transported media streams.
The dejittering scheme is based on the statistical approximation of delay variation in the arrival times of video packets
carrying encoded clock reference values and a filtering and re-stamping mechanism. In addition, a brief overview of the MPEG-4
system is presented. 相似文献
9.
Abhai Mansingh 《AI & Society》2002,16(1-2):138-147
In the wake of the information technology (IT) revolution, the paper describes the changing role of universities to promote
IT education in India to generate qualitative and competitive manpower in the face of the mushrooming of private institutions
in the field of IT. The rapid growth of private teaching initiatives reflects inadequacies of the public educational system
to the needs of the emerging IT environment, especially considering the high prices charged by private training. It is pointed
out that the emerging knowledge society and the economy are not going to be based on IT alone, but will depend on the development
of both IT and basic research in domain areas. Any policy on IT education should ensure that basic disciplines are not ignored.
Universities should develop new and innovative programmes for students from different basic disciplines to give training for
high-end jobs. To promote IT education a new innovative concept of earning while learning has recently been introduced. Some
of the initiatives started by Delhi University to modify/improve course programmes for IT education are highlighted, looking
at the needs of the industry. 相似文献
10.
C. Stary 《Universal Access in the Information Society》2001,1(1):16-30
This paper addresses user modelling for “Design for All” in a model-based approach to Human-Computer Interaction, paying particular
attention to placing user models within organisational role- and task-related contexts. After reviewing a variety of user
modelling approaches, and deriving requirements for user modelling related to Design for All, the paper proposes a role-driven
individualised approach. Such an approach is based on a model-based representation schema and a unifying notation that keeps
the user’s models and the contextual information transparent and consistent. Individualisation is achieved by coupling symbolic
model specifications with neural networking on synchronisation links between symbolic representation elements. As a result,
user modelling for Design for All is achieved not by stereotypical user properties and functional roles, but by accommodating
the actual users’ behaviour.
Published online: 18 May 2001 相似文献
11.
Sibel Adalı K. Selçuk Candan Su-Shing Chen Kutluhan Erol V.S. Subrahmanian 《Multimedia Systems》1996,4(4):172-186
We describe how video data can be organized and structured so as to facilitate efficient querying. We develop a formal model
for video data and show how spatial data structures, suitably modified, provide an elegant way of storing such data. We develop
algorithms to process various kinds of video queries and show that, in most cases, the complexity of these algorithms is linear.
A prototype system, called the Advanced Video Information System (AVIS), based on these concepts, has been designed at the
University of Maryland. 相似文献