Design and Development Research Papers (original) (raw)

In the information security arena, one of the most interesting and promising techniques proposed is Role -Based Access Control (RBAC). In the last few years, much work has been done in the definition and implementation of RBAC. However,... more

In the information security arena, one of the most interesting and promising techniques proposed is Role -Based Access Control (RBAC). In the last few years, much work has been done in the definition and implementation of RBAC. However, so far the concept of delegation in RBAC has not been studied. The basic idea behind delegation is that some active entity i n a system delegates authority to another active entity in order to carry out some functions on behalf of the former. User delegation in RBAC is the ability of one user (called the delegating user) who is a member of the delegated role to authorize another user (called the delegate user) to become a member of the delegated role. This paper extends a series of simple but practically useful models for delegation, described in the literature by Barka and Sandhu (3), and starts the development of a scheme of prototype implementation in order to validate these models. More specifically, this paper reviews the most recent Role-Based Access Control (RBAC) Implementations, analyzes the implementation techniques used in other forms of delegations (other than the human-to-human delegation), and designes and develops prototype implementations of user-to-user role delegation based on the Role-Based Delegation Models, in flat roles (RBDM0), and in hierarchical roles (RBDM1).

This paper addresses and implements a Direct Sequence Spread Spectrum (DSSS) transceiver for Visible Light Communication (VLC) systems based on FPGA. A transceiver was implemented including a transmitter capable of driving an array of... more

This paper addresses and implements a Direct Sequence Spread Spectrum (DSSS) transceiver for Visible Light Communication (VLC) systems based on FPGA. A transceiver was implemented including a transmitter capable of driving an array of light emitting diodes (LED) and a Pseudo-Noise (PN) matched decorrelator. The receiver architecture uses a discrete FIR correlator for data synchronization and acquisition. In this paper, a novel and simple PN code with a 10 bit sequence length is developed. This code ...

The possibility of developing a photochemical setup on the basis of an optically pumped ammonia laser with an intracavity photoreactor is proved. The obtained values of the cavity 'implication' factor γ are comparable with those of... more

The possibility of developing a photochemical setup on the basis of an optically pumped ammonia laser with an intracavity photoreactor is proved. The obtained values of the cavity 'implication' factor γ are comparable with those of intracavity systems based on a CO2 laser. The conditions for achieving the maximum energy in the focusing cavity are determined and the ways to control the shape of its caustic are indicated.

Post Traumatic Stress Disorder (PTSD) is reported to be caused by traumatic events that are outside the range of usual human experiences including (but not limited to) military combat, violent personal assault, being kidnapped or taken... more

Post Traumatic Stress Disorder (PTSD) is reported to be caused by traumatic events that are outside the range of usual human experiences including (but not limited to) military combat, violent personal assault, being kidnapped or taken hostage and terrorist attacks. Initial data suggests that 1 out of 6 returning Iraq War military personnel are exhibiting symptoms of depression, anxiety and PTSD. Virtual Reality (VR) exposure therapy has been used in previous treatments of PTSD patients with reports of positive outcomes. The aim of the current paper is to specify the rationale, design and development of an Iraq War PTSD VR application that is being created from the virtual assets that were initially developed for theX-Box game entitled Full Spectrum Warrior which was inspired by a combat tactical training simulation, Full Spectrum Command.

Abstract. In this paper we describe the principles of the design and development of an intelligent query interface, done in the context of the SEWASIE (SEmantic Webs and AgentS in Integrated Economies) European 1ST project. The SEWASIE... more

Abstract. In this paper we describe the principles of the design and development of an intelligent query interface, done in the context of the SEWASIE (SEmantic Webs and AgentS in Integrated Economies) European 1ST project. The SEWASIE project aims at enabling a uniform access to heterogeneous data sources through an integrated ontology. The query interface is meant to support a user in formulating a precise query-which best captures her/his information needs-even in the case of complete ignorance of the vocabulary of the ...

Abstract. The evaluation and management of medication side-effects is a common and complex task for physicians. Information visualization has the potential to increase the efficiency and reduce the cognitive load involved in this process.... more

Abstract. The evaluation and management of medication side-effects is a common and complex task for physicians. Information visualization has the potential to increase the efficiency and reduce the cognitive load involved in this process. We describe the design and development of Rxplore, a novel tool for assessing medication side-effects. Rxplore supports simultaneous lookup of multiple medications and an intuitive visual representation of query results. In a pilot study of Rxplore's usability and utility, physicians rated the ...

The paper discusses design and development issues of an online program for enhancing management skills of Early Years Childcare practitioners. The program is developed in the frames of the EEEYMS* project by partners from UK, Bulgaria,... more

The paper discusses design and development issues of an online program for enhancing management skills of Early Years Childcare practitioners. The program is developed in the frames of the EEEYMS* project by partners from UK, Bulgaria, Finland, and the Netherlands. The purpose is to design an ICT-based flexible learning solution for problem-based learning. The content is organized in nine modules.

1.—Magnolia Optical Technologies, Inc., Woburn, MA 01801. 2.—University of Massachusetts, Lowell, MA 01854. 3.—Department of Electrical Engineering, Boston University, Boston, MA 02215. 4.—US Army Space and Missile Defense Command, ...

Software maintenance claims a large proportion of organizational resources. It is thought that many maintenance problems derive from inadequate software design and development practices. Poor design choices can result in complex software... more

Software maintenance claims a large proportion of organizational resources. It is thought that many maintenance problems derive from inadequate software design and development practices. Poor design choices can result in complex software that is costly to support and difficult to change. However, it is difficult to assess the actual maintenance performance effects of software development practices because their impact is

With the increasing number of vehicles on the road, it has become difficult to properly control the flow of traffic especially in large cities like Lahore. The proposed system uses a digital camera mounted on a stepper motor to sense the... more

With the increasing number of vehicles on the road, it has become difficult to properly control the flow of traffic especially in large cities like Lahore. The proposed system uses a digital camera mounted on a stepper motor to sense the traffic on the road. The decision to open the lane is done after monitoring the traffic load. The heavily loaded side is turned on for a longer time. Thus the system is intelligent because it is not using the fixed time frame. The system is also integrated with GSM, thus the signals can also be ...

A plethora of digital ECG formats have been proposed and implemented. This heterogeneity hinders the design and development of interoperable systems and entails critical integration issues for the healthcare information systems. This... more

A plethora of digital ECG formats have been proposed and implemented. This heterogeneity hinders the design and development of interoperable systems and entails critical integration issues for the healthcare information systems. This paper aims at performing a comprehensive overview on the current state of affairs of the interoperable exchange of digital ECG signals. This includes 1) a review on existing