We show how to find all the integrating factors and corresponding first integrals for any system of Ordinary Differential Equations (ODEs). Integrating factors are shown to be all solutions of both the adjoint system of the linearised system of ordinary differential equations and a system that represents an extra adjoint-invariance condition. We present an explicit construction formula to find ...

in the last two decades, the trend in healthcare information technology has been towards digital and multimedia concepts. the next generation of healthcare information systems will consist of a vast network of heterogeneous, autonomous and distributed imaging scanners, hospital information systems (his), medical information from clinical departments such as radiology information systems (ris), ...

The World Wide Web(WWW) offers a crossplatform environment and standard protocols that enable integration of various applications available on the Internet. The authors use the Web to facilitate interaction between their Webbased Clinical Information System and a decision-support system DXplain, at the Massachusetts General Hospital using local architecture and Common Gateway Interface programs...

The Integrating Sphere Integrating Nephelometer is a novel and unique reciprocal nephelometer that uses an integrating sphere with attached truncation-reduction tubes to contain the sample volume and to integrate the scattered light. Its main advantage compared with current integrating nephelometers is a sevenfold reduction in truncation angle, which reduces errors in measured scattering from l...

In this paper we argue for computer workstation access to voice telephony functions. We describe several computer based communication tools developed in our laboratories, and explore one, Phonetool, as a detailed example. We discuss user interface issues for collections of such utilities. Finally, we discuss several architectures for interaction with the PBX and the communication requirements b...

Introduction In the last few years the quantitative modelling of credit risk has received a lot of attention within the financial industry. Several models have been released to the public, notably CreditRisk+, CreditMetrics, Credit Portfolio View [CR97, CM97, CP98]. Although different approaches to credit risk are used, studies have shown that the models yield similar results if the parameters ...

ZHAI, YAN. Integrating Multiple Information Resources to Analyze Intrusion Alerts. (Under the direction of Associate Professor Peng Ning). Intrusion detection systems (IDSs) are important components of network security. However, it is well known that current IDSs generate large amount of alerts, including both true and false alerts. Other than proposing new techniques to detect intrusions witho...

This paper describes three techniques for reachability analysis for systems modeled by ordinary diierential equations (ODEs). First, linear models with regions modeled by convex polyhedra are considered, and an exact algorithm is presented. Next, non-convex polyhedra are considered , and techniques are presented for representing a polyhedron by its projection onto two-dimensional subspaces. Thi...

Cognitive science has largely assumed we can understand the mind without taking consciousness into account. From an evolutionary perspective, this is not a plausible assumption. The sophisticated display of multiple types of information characteristic of consciousness could not have evolved unless these display formats were functionally integrated into the mind's information processing system. ...