The problem of continuous position availability is one of the most important issues connected with the human activity at sea. Because the availability of satellite navigational systems can be limited in some cases, e.g. during military operations, one has to consider additional methods of acquiring information about the ship’s position. In this paper one of these methods is presented, which is ...

Using experimental facts about long-term potentiation (LTP) and hippocampal place cells, we model how a spatial map of the environment can be created in the rat hippocampus. Sequential firing of place cells during exploration induces, in the model, a pattern of LTP between place cells that shifts the location coded by their ensemble activity away from the actual location of the animal. These sh...

The expansion of the World Wide Web has resulted in a large amount of data that is now freely available for user access. The data have to be managed and organized in such a way that the user can access them efficiently. For this reason the application of data mining techniques on the Web is now the focus of an increasing number of researchers. One key issue is the investigation of user navigati...

Aging may have an impact on the CA3 autoassociative network of the hippocampus, posited by computational models as supporting pattern completion. Twenty-five young (YAs) and 25 older adults (OAs) performed a spatial pattern completion task using a computerized navigational paradigm analogous to a rodent pattern completion task reliant on the CA3. Participants identified a previously seen goal l...

Execution patterns are a newmetaphor for visualizing execution traces of object-oriented programs. We present an execution pattern view that lets a programmer visualize and explore a program’s execution at varied levels of abstraction. The view employs visual, navigational, and analytical techniques that accommodate lengthy, real-world traces. By classifying repetitive behavior automatically in...

Supporting the navigator in decision making processes may substantially contribute to the enhancement of the safety in sea transport. The navigational decision support system supplements the existing range of equipment and systems intended for sea-going ship conduct. One of the basic tasks of such systems is an analysis of a navigational situation and solving collision situations. A well functi...

A study was conducted to investigate the effects of navigational inconsistencies in websites on users’ perceptions and performance. Of four inconsistencies manipulated (position of navigational bar, order of elements in navigational bar, font type and size of elements), only the position of the bar had a substantial effect. However this affected both users’ perception of their performance and t...

The goal of the Robotic Antarctic Meteorite Search is to enable discovery of meteorites in Antarctica by a mobile robot. The extreme environment makes it one of the best places to find meteorites, but one of the worst places for humans to work. The meteorite-finding robot will traverse an ice field in a pattern designed to cover the area completely, stopping to investigate potential meteorites ...

This work presents an approach for specifying the navigational characteristics of Adaptive Hypermedia Systems, providing the conceptual primitives of a pre-existing Navigational Model with adaptive navigational properties. These properties allow managing the accessibility and order of the modelled navigational paths according to the characteristics of the user. Values of these properties define...

Abstract In this paper, a circular polarized patch antenna at NaviC and S-band is presented for Indian Regional Navigational Satellite System (IRNSS) receiver applications. For application proposed satisfying the criteria of polarisation with bandwidth 2477 MHz to 2508 MHz. The shape exhibits good gain which required operation communication systems IRNSS. Antenna operating frequency 2492.08 (S-...