We show that coarse graining arguments invented for the analysis of multi-spin systems on a randomly triangulated surface apply also to the O(n) model on a random lattice. These arguments imply that if the model has a critical point with diverging string susceptibility, then either γ = + 1 2 or there exists a dual critical point with negative string susceptibility exponent, ˜ γ, related to γ by...

Recent years have witnessed a growing interest in interactive narrative-centered virtual environments for education, training, and entertainment. Narrative environments dynamically craft engaging story-based experiences for users, who are themselves active participants in unfolding stories. A key challenge posed by interactive narrative is recognizing users’ goals so that narrative planners can...

This paper will show how the accuracy and security of SCADA systems can be improved by using anomaly detection to identify bad values caused by attacks and faults. The performance of invariant induction and ngram anomaly-detectors will be compared and this paper will also outline plans for taking this work further by integrating the output from several anomalydetecting techniques using Bayesian...

1Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Republic of Singapore, 2Department of Chemistry, Faculty of Science, National University of Singapore, 3Medicinal Chemistry Programme, Life Sciences Institute, National University of Singapore, 4Department of Anaesthesia, Yong Loo Lin School of Medicine, National University of Singapore, Republic of ...

The immense growth of online social networks from simply being a medium of connecting people to assuming a variety of roles has led to a massive increase in their use and popularity. Today, networks like Facebook and Twitter act as news sources, mediums of advertising and facilitators of socio-political revolutions. In such a scenario, it is of vital importance to be able to detect the opinions...

The mass popularity of online social networks such as Facebook and Twitter makes them an interesting and important platform for exchange of ideas and opinions. Accurately capturing the opinions of users from their self-generated data is crucial for understanding these opinion flow processes. We propose a supervised model that uses a combination of hashtags and n-grams as features to identify th...

The postal network is an interconnection network that possesses many desirable properties which are important in network design and applications. It includes hypercubes and Fibonacci cubes as its special cases. The postal network can also be considered as a flexible version of the hypercube which relaxes the restriction on the number of nodes and thus makes it possible to construct multicompute...

We propose several means for improving the performance and training of neural networks for classification. We use crossvalidation as a tool for optimizing network parameters and architecture. We show further that the remaining residual “generalization” error can be reduced by invoking ensembles of similar networks. Zndex Terms-Crossvalidation, fault tolerant computing, neural networks, N-versio...

Homogeneous nucleation of NAD and NAT in liquid stratospheric aerosols: insufficient to explain denitrification D. A. Knopf, T. Koop, B. P. Luo, U. G. Weers, and T. Peter Institute for Atmospheric and Climate Science, Swiss Federal Institute of Technology, Zurich, Switzerland Received: 18 April 2002 – Accepted: 13 May 2002 – Published: 12 June 2002 Correspondence to: D. A. Knopf (Daniel.Knopf@a...

Terra and Aqua, 2 satellites launched by the NASA-centered international Earth Observing System project, house MODIS (Moderate Resolution Imaging Spectroradiometer) sensors. Moderate resolution remote sensing allows the quantifying of land surface type and extent, which can be used to monitor changes in land cover and land use for extended periods of time. In this paper, we propose applying a p...