Temat: LORETA - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Using LORETA Method Based on the EEG Signal for Localizing the Sources of Brain Waves Activity
Autorzy:: Paszkiel, S.
Powiązania:: https://bibliotekanauki.pl/articles/114284.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: electroencephalography
LORETA
signal
brain computer-interfaces
Opis:: The article presents the possibility of using the method of imaging brain activity, LORETA LOw Resolution Electromagnetic TomogrAphy), that can base on electroencephalographical and magnetoencephalographical readings. Thanks to using the above-mentioned method, it is possible to localize the sources of the activity of individual signals registered on the head surface. This is very significant regarding construction of the brain-computer interfaces in order to conduct proper identification and classification of signals obtained during electroencephalography.
Źródło:: Measurement Automation Monitoring; 2016, 62, 8; 262-264
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Towards the Applications of Algorithms for Inverse Solutions in EEG Brain-Computer Interfaces
Autorzy:: Jagodzińska, U.
Powiązania:: https://bibliotekanauki.pl/articles/227083.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: BCI
EEG
inverse solutions
minimizing norm method
LORETA
Opis:: Locating the sources of EEG signals (signal generators), i.e. indicating the places in the brain that the signals come from is the objective of the inverse problem in BCI applications using EEG. The two algorithms based on the methods used in the inverse problem: the linear least squares method and the LORETA1 method were compared. An analysis of the accuracy of locating the sources generating EEG signals on the basis of the two above mentioned methods was carried out with the use of the MATLAB programme. The findings made it possible to determine both the complexity of calculation involved in the methods under consideration and to compare the accuracy of the results obtained. Tests were done in which the inverse problem was solved on the basis of the data that were entered from the electrodes. Then potentials on electrodes were found by means of solving the forward problem once again ɸ (ɸ→ɸ). Moreover, tests were conducted on simulated data describing current density at selected places in the brain. In this case potentials on the electrodes were found by means of solving the forward problem. Subsequently the inverse problem was solved and potentials at selected places in the brain were specified J(J→Ĵ). In the case of J(J→Ĵ) only the relative error was examined, while the variance was studied in both cases. As a result of doing the tests, it was proved that relative errors were the same in the SVD and PINV methods, while in the LORETA method the error was similar. The variance computed for these methods was more differentiated for each of the cases, which made it possible to compare the algorithms in a better way. Differentiation of the variances under 0.2 shows that the algorithms that have been analyzed work properly. On the basis of knowing the results of the inverse problem, an attempt was made to make a selection of the best features of the EEG signal which differentiates the classes. In the present work tests were conducted to examine the differentiation of selected classes. Welch’s t-statistics was used to differentiate and order them. The results of the tests present the order for three classes of thought tasks, i.e. imagining moving one’s left hand, imagining moving one’s right hand, imagining generating words beginning with a randomly chosen letter. The present work is an introduction to a wider classification of features which are made with the use of inverse solutions.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 3; 277-283
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: W nawiazaniu do artukulu prof. dr. Jozefa Brody pt. Program gospodarczy Adama Loreta w lasach panstwowych i przebieg jego realizacji
Autorzy:: Heymanowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/812181.pdf
Data publikacji:: 1995
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: gospodarka lesna
hodowla lasu
program gospodarczy Adama Loreta
lesnictwo
lasy panstwowe
Źródło:: Sylwan; 1995, 139, 03; 104-112
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Program gospodarczy Adama Loreta w lasach panstwowych i przebieg jego realizacji
Adam Lorets Program in State Forests and Course of its Execution
Autorzy:: Broda, J.
Powiązania:: https://bibliotekanauki.pl/articles/817423.pdf
Data publikacji:: 1993
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: dwudziestolecie miedzywojenne
gospodarka lesna
program gospodarczy Adama Loreta
historia
Polska
lesnictwo
lasy panstwowe
Źródło:: Sylwan; 1993, 137, 06; 37-44
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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