The spectral behaviour of device 5-90 at a current of 10 mA, well into the multimode regime, is shown in Fig. 3. Even though higherorder modes contain various fractions of both polar&ations, the hndamental mode polarisation is still pinned to the [01 11 crystal direction with a similar suppression ratio as before. This indicates that the polarisation selection mechanism may be strong enough for...

In this paper we present an alternative approach for the problem of action selection in autonomous agents. The control acrhitecture used is a Braitenberg architecture extented in order to include action selection capabilities when more processes are involved

Before Darwin many biologists considered organic forms to be immutable natural forms or types which like inorganic forms such as atoms or crystals are part of a changeless world order and determined by physical law. Adaptations were viewed as secondary modifications of these 'crystal like' abstract afunctional 'givens of physics.' We argue here that much of the emerging picture of biological or...

Understanding, or even defining, modularity in the human brain is not as straightforward as one might expect. It is natural to assume that modularity offers computational advantages, and that evolution by natural selection would translate those advantages into the kind of modular neural structures familiar to cognitive scientists. However, explicit simulations of the evolution of neural systems...

Objective. Our purpose was to investigate radiology fellowship directors' and recent fellows' experiences and perceptions with regard to the fellowship application and selection process and to compare these experiences and perceptions. Materials and Methods. Institutional review board approval was obtained. We conducted an online survey of the memberships of three radiology subspecialty societi...

Robustness of feature selection techniques is a topic of recent interest, especially in high dimensional domains with small sample sizes, where selected feature subsets are subsequently analysed by domain experts to gain more insight into the problem modelled. In this work, we investigate the robustness of various feature selection techniques, and provide a general scheme to improve robustness ...

This paper presents a method for detecting words related to a topic (we call them topic words) over time in the stream of documents. Topic words are widely distributed in the stream of documents, and sometimes they frequently appear in the documents, and sometimes not. We propose a method to reinforce topic words with low frequencies by collecting documents from the corpus, and applied Latent D...