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Promising potential of several novel ternary crystals (TI4YXS3, Y=Sn, Pb; X=S, Te) for applications in infrared (IR) optoelectronics, LEDs (light emitting diodes) and photodetectors operating in the middle and far IR spectral ranges has been demonstrated in the present work. Besides, these materials can be used as thermoelectric materials [1], IR harmonic frequency triggers, modulators, optical memory...
Camera-based measurement of the blood volume pulse via non-contact, imaging photoplethysmography is a very popular approach for measuring pulse rate using a remote imaging sensor. Comparatively less attention has been paid to the usefulness of the method for measuring features of pulse rate variability, and even less focus has been put on the accuracy of any cardiac activity feature that can be achieved...
In recent years researchers have presented a number of new methods for recovering physiological parameters using just low-cost digital cameras and image processing. The ubiquity of digital cameras presents the possibility for many new, low-cost applications of vital sign monitoring. In this paper we present a review of the work on remote photoplethysmographic (PPG) imaging using digital cameras. This...
The paper presents an extended version of the SuperMatrix system-a general tool supporting automatic acquisition of lexical semantic relations from corpora. Extensions focus mainly on parallel processing of massive amounts of data. The construction of the system is discussed. Three distributed parts of the system are presented, i.e., distributed construction of co-incidence matrices from corpora,...
Word Sense Disambiguation in text is still a difficult problem as the best supervised methods require laborious and costly manual preparation of training data. On the other hand, the unsupervised methods express significantly lower accuracy and produce results that are not satisfying for many application. The goal of this work is to develop a model of Word Sense Disambiguation which minimises the...
Data repositories such as the USGS' National Water Information System (NWIS), EPA's Storage and Retrieval System (EPA STORET) offer a considerable volume of data for researchers and engineers in the United States through their Websites. While accessible through a Web browser, data from these sources can not be directly ingested by modeling or analysis tools without human intervention. Different input/output...
The paper presents the supermatrix system, which was designed as a general tool supporting automatic acquisition of lexical semantic relations from corpora. The construction of the system is discussed, but also examples of different applications showing the potential of supermatrix are given. The core of the system is construction of co-incidence matrices from corpora written in any natural language...
The construction of a wordnet from scratch requires intelligent software support. An accurate measure of semantic relatedness can be used to extract groups of semantically close words from a corpus. Such groups help a lexicographer make decisions about synset membership and synset placement in the network. We have adapted to Polish the well-known algorithm of Clustering by Committee, and tested it...
In the paper we present an adaptation of the Espresso algorithm of the extraction of lexical semantic relation to specific requirements of Polish. The introduced changes are of more technical character like the adaptation to the existing Polish language tools, but also we investigate the structure of the patterns that takes into account specific features of Polish as an inflectional language. A new...
We compare three different methods of word sense disambiguation applied to the disambiguation of a selected set of 13 Polish words. The selected words express different problems for sense disambiguation. As it is hard to find works for Polish in this area, our goal was to analyse applicability and limitations of known methods in relation to Polish and Polish language resources and tools. The obtained...
Our objective is to provide a flexible, scalable, distributed architecture that assures a high performance for information extraction (IE) systems working in Internet. The architecture is based on both the general paradigm of the service-oriented architecture, client-server approach and strong separation of concerns between storage and processing components. An experimental IE system, named Semanta,...
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