This paper describes how a requirement for stereovision can impact virtual environment characteristics and performance. Human visual anomalies that result from the limitations of producing congruent visual cues are described along with possible solutions. The CAVE is used as a model environment that implements stereovision to provide users with visual contact with objects at arms' length.

Requirements capture is about getting as accurate a picture as possible of what the users want, before investing overmuch effort in design. Despite RAD techniques, there can still be a substantial delay between requirement and first delivery; and despite joint application development, it's still possible for substantial questions about exactly what the software should do to turn up unpleasantly...

Recently P2P computing has attracted lots of attention from both the distributed computing community and millions and millions of Internet users. This paper describes a pure P2P file sharing system, QuickPeer, which is originally designed to satisfy the requirement for a graduate computer science course. Our QuickPeer system is not only a P2P application, but also a software framework for distr...

We study admission control mechanisms for wireless access networks where (i) each user has a minimum service requirement, (ii) the capacity of the access network is limited, (iii) the access point is not allowed to use monetary mechanisms to guarantee that users do not lie when disclosing their minimum service requirements, and (iv) the access point wants to admit as many users as possible. To ...

In the current mobile communication networks, users have to trtistnetwork operators to make correct. charges over the cds they made. There islack of evidence to resolve possible disputti+ over thenurnberofcdls and the duration of each cd. Such a concern may grow when users roam among different network operators. This paper proposes an efficient solution to undeniable b]~ng when a mobile user ro...

With the increase in an online transactions and interactions on the internet, a key issue is how to use efficient and simple evaluation method to achieve trust based decisionmaking for service users and service providers. Trust plays an important role in all commercial cloud environments. It is the evaluation of capability of service providers as well as service users in completing a task based...

The Geographical Information System (GIS) design process usually involves experts in specific application domains (e.g. geology and forestry). These experts are responsible for capturing user needs, and communicating them to GIS developers. However, as the community of users is not directly involved in the design process, these experts may miss some user intentions. This may lead to ill-defined...

Abstract This paper introduces the development of test methods for capability evaluation Unmanned Aircraft Systems (UASs) in Global Navigation Satellite System (GNSS)-denied environments. The purpose this is to facilitate growth UAS industry. We discuss method’s approach and what UAS’s essential use GNSS-denied As a result, we decided adopt an that method evaluates perform single simple task. I...

In the Grid Computing environment, many users need the results of their calculations within a specific period of time. Examples of those users are weather forecasters running weather forecasting workflows, and automobile producers running dynamic fluid simulation workflow Lovas et al. (2004). Those users are willing to pay for getting their work completed on time. However, this requirement must...

Nowadays, in-memory data analytic platforms, such as Spark, are widely adopted in big data processing. The proper memory capacity configuration has been proved to be an efficient way to guarantee the workload performance in such platforms.Currently, Spark adopts the static way to configure the memory capacity for workloads based on user specifications. However, due to the lack of deep knowledge...