In their 2004 paper Hevner et. al proposed a set of guidelines for conducting design science research projects in the IS discipline. While useful, these guidelines have a relatively high level of abstraction. However, various IT artifacts such as models, methods, techniques and implementations require IS researchers to apply differing methods in order to construct and evaluate purposeful artifa...

Crowdsourcing refers to the arrangement in which contributions are solicited from a large group of unrelated people. Due to this nature, crowdsourcers (or task requesters) often face uncertainty about the workers' capabilities which, in turn, affects the quality and timeliness of the results obtained. Trust is a mechanism used by people to facilitate interactions in human societies where risk a...

This paper analyzes recent research in the field of distributed file systems, with a particular emphasis on the problem of high availability. Several of the techniques involved in building such a system are discussed individually: naming, replication, multiple versions, caching, stashing, and logging. These techniques range from extensions of ideas used in centralized file systems, through new ...

To perform effective intrusion analysis in higher bandwidth network, this paper studies the data collecting techniques and proposes a scalable efficient intrusion monitoring architecture (SEIMA) for network intrusion detection system (NIDS). In the architecture of SEIMA, scaling network intrusion detection to high network speeds can be achieved using multiple sensors operating in parallel coupl...

Conventional image matching techniques for DTM determination are unable overcome the disparity discontinuities in the stereo model caused by man-made structures and only supply a Digital Surface Model (DSM). In order to produce a DTM of the bare earth, the characteristics of the terrain cover, such as buildings and trees must to be determined to reduce the elevations derived from image matching...

Online fan communities are an important element in the market success of a videogame, and game developers have begun to recognize the importance of fostering online communities associated with their games. In this paper we report on a study that investigated the techniques used by game developers to maintain and promote online communities within and around their games. We found that game develo...

Frequent freezes and crashes on current systems bring tremendously heavy loads to the system administration, directly resulting in an undesirable increase on the total cost of ownership (TCO). Obviously, it is time to broaden the long lasting performance-dominated research focus, which has neglected other aspects of computing such as dependability, availability and stability. Deeming that softw...

T his is the final article in a five-part series on microwave frequency synthesizers. It concludes with a review of advanced synthesizer solutions. Although synthesizers can be found in virtually any microwave system, test and measurement (T&M) is probably the most challenging application that calls for advanced synthesizer techniques. This final article addresses some specific T&M requirements...