6086610
Security for fixed sensor networks
Sensor networks consist of resource-constrained sensors operating in a variety of environments. Given the severe constraints on these sensors, it is a particularly challenging problem to choose and design valid security protocols for such networks. This problem has recently given rise to new research addressing the security issues. This paper presents an overview of the important works, specifically the new mechanisms and protocols, which have been introduced or are still under development in this area.
2351489
An Empirical Study Using Task Assignment Patterns to Improve the Accuracy of Software Effort Estimation
In most software development organizations, there is seldom a one-to-one mapping between software developers and development tasks. It is frequently necessary to concurrently assign individuals to multiple tasks and to assign more than one individual to work cooperatively on a single task. A principal goal in making such assignments should be to minimize the effort required to complete each task. But what impact does the manner in which developers are assigned to tasks have on the effort requirements? This paper identifies four task assignment factors: team size, concurrency, intensity, and fragmentation. These four factors are shown to improve the predictive ability of the well-known intermediate COCOMO cost estimation model. A parsimonious effort estimation model is also derived that utilizes a subset of the task assignment factors and unadjusted function points. For the data examined, this parsimonious model is shown to have goodness of fit and quality of estimation superior to that of the COCOMO model, while utilizing fewer cost factors.
17812918
Acquiring and delivering lessons learned for NASA scientists and engineers: a dynamic approach
Web forms are a common mechanism for collecting information online. They pose some limitations which negatively affect ease and flexibility of user interaction. These limitations are more pronounced when collecting information that can not be broken down into well defined and agreed upon structures. Lessons Learned or any kind of 'knowledge' is an example of such information. In this paper we introduce a concept of 'Dynamic Forms' which is aimed at enhancing user interaction while collecting unstructured information, 'Lessons Learned' in particular.
17403700
Planning horizons for the deterministic capacity problem
Abstract We consider the problem of determining the optimal timing and sizing of new facility construction under a continuous technology model of possible sizes. The rate of convergence of short to long run optimal policies is established and planning horizon implications are explored. We also present an efficient algorithm for solving such problems for all horizon times by solving a single horizon time problem
38459829
Mandatory protection for Internet server software
Server software on the Internet is today's high point for software at risk. Ongoing reports of security flaws suggest that conventional Internet server software packages are intrinsically vulnerable to "server overrun", an attack that subverts the server's behavior and causes it to run attack code instead. The attack code then penetrates other portions of the server host or site unless there are additional defenses. Mandatory protection mechanisms, like those developed for multilevel security applications, can limit the risks of server overrun to a site. Commercial systems have been developed that use three distinct mechanisms: Unix "chroot" isolation, multilevel security (MLS), and type enforcement. The paper compares and contrasts these three mechanisms for server protection.
2984394
Augmented Reality Chinese Checkers
This paper presents an application, Augmented Reality Chinese Checkers that we created to investigate user interface issues for table top projected augmented reality entertainment applications. A new tangible interaction device, the wireless button enhanced fiducial, is introduced to support selection tasks in mixed reality environments. The Augmented Reality Chinese Checkers game is built on a framework which can be used to create other computer supported collaborative games. The system is built using the Passive Detection Framework to track the 6 degrees of freedom position in real time of marked objects in the environment. The game supports up to six players at a time.
61043025
Auditory icons in large-scale collaborative environments
5111320
Work rhythms: analyzing visualizations of awareness histories of distributed groups
We examined records of minute-by-minute computer activity coupled with information about the location of the activity, online calendar appointments, and e-mail activity. We present a number of visualizations of the data that exhibit meaningful patterns in users' activities. We demonstrate how the patterns vary between individuals and within individuals according to time of day, location, and day of the week. Some patterns augment the schedule information found in people's online calendars. We discuss applications for group coordination (especially across time zones) plus opportunities for future research. In light of the popularity of instant messaging, this research identifies some of the benefits and privacy risks associated with the uses of online presence and awareness information.