3,235 research outputs found
Independent component analysis and source analysis of auditory evoked potentials for assessment of cochlear implant users
No full textSource analysis of the Auditory Evoked Potential (AEP) has been used before to evaluate the maturation of the auditory system in both adult and children; in the same way, this technique could be applied to ongoing EEG recordings, in response to acoustic specific frequency stimuli, from children with cochlear implants (CI). This is done in oder to objectively assess the performance of this electronic device and the maturation of the child?s hearing. However, these recordings are contaminated by an artifact produced by the normal operation of the CI; this artifact in particular makes the detection and analysis of AEPs much harder and generates errors in the source analysis process. The artifact can be spatially filtered using Independent Component Analysis (ICA); in this research, three different ICA algorithms were compared in order to establish the more suited algorithm to remove the CI artifact. Additionally, we show that pre-processing the EEG recording, using a temporal ICA algorithm, facilitates not only the identification of the AEP peaks but also the source analysis procedure. From results obtained in this research and limited dataset of CI vs normal recordings, it is possible to conclude that the AEPs source locations change from the inferior temporal areas in the first 2 years after implantation to the superior temporal area after three years using the CIs, close to the locations obtained in normal hearing children. It is intended that the results of this research are used as an objective technique for a general evaluation of the performance of children with CIs
Carlos Castaneda, Anthropology and the Construction of a Magical Mexico
No full textIn this filmed lecture, Dr. Ageeth Sluis (associate professor of Latin American history at Butler University) discusses her research on American author Carlos Castaneda. In 1960, Castaneda found himself eye to eye with Juan Matus, a Yaqui shaman, in a bus station in the border town of Nogales, Arizona. Castaneda, then a graduate student in anthropology at the University of California-Los Angeles, met Don Juan because he sought an informant on the indigenous use of psychotropic plants. Castaneda supposedly got more than he bargained for when he became the shaman\u27s apprentice. Describing the separate realities of a secret indigenous world, Castaneda\u27s first three books (beginning with The Teachings of Don Juan) became international bestsellers and propelled Castaneda into the world of fame and notoriety.
Sluis explores how Castaneda\u27s work provides a unique window on a series of related phenomena: the rise of a New Left, counterculture spirituality, a politicization of anthropology, new understandings of indigenous identity, and the creation of a magical Mexico
Differences in source analysis of AEP generators following Fastica and TDSEP-ICA denoising
No full textDifferent factors can affect the accuracy of the source localization of evoked potentials: the SNR of the data, the head model, and the number of sources, mention but a few. Another fundamental factor is the correct application of independent components analysis (ICA) to both filter out artefacts and select the independent components (IC) related to the neurological response. In this paper we assess the differences in the source analysis accuracy of the auditory evoked potential (AEP) generators between a temporal ICA (TDSEP-ICA) algorithm and a statistically based algorithm (FastICA) in EEG, from children with cochlear implants (CIs). The parameters used to compare both ICA algorithms and validate the source localization include: residual standard deviation, confidence ellipsoids, localization and time of best dipole fit. Here we show that pre-processing using TDSEP- ICA facilitates the identification of the AEP peaks and the source analysis procedure. The results obtained in this research could be used as objective technique for a general evaluation of the performance of children with CIs
Zum Phosphataneignungsvermögen von Gelblupine (Lupinus luteus L.) und Kichererbse (Cicer arietinum L.) auf zwei sauren P-armen Böden Portugals
No full textFrom novices to experts. Skill development and knowledge transmission in prehistory
No full textNo abstract availabl
Assessment of the neurological maturation in children with cochlear implants: identification of AEPs by ICA
No full textCastaneda\u27s Mesoamerican inspiration : the Tonal/Nagual, the cardinal points and the birth of contemporary Toltec spirituality
No full textOn the basis of his most celebrated bestsellers, Carlos Castaneda has usually been analyzed as a precursor of the emerging pre-Harnerian Neo-Shamanism, one that was chiefly inspired by the cultures of the so-called Oasisamerica and the spirituality of the Great Plains. Nevertheless, in his transitional period (the 1970s and the early 1980s), Castaneda also explored ancient Mesoamerican symbolism. The fruit of this new inspiration mainly consists of three concepts – the Tonal/Nagual, the symbolism of the cardinal points, and the Toltec. The term "Nagual" as well as "Toltec" persisted long after Castaneda\u27s death and proved to be one of the most popular traits of the author\u27s doctrine. Such contemporary celebrity authors as Miguel Ruiz owe their idea of the Toltec to Castaneda
The Castaneda Phenomenon and the Creation of the Toltec Movement or Damn ... I Want the Money
No full textIn the latter part of the twentieth century the bestselling author and supposed anthropologist, Carlos Castaneda, created his own secret new religious movement. This thesis chronicles this movement along with the various other kinds of cults he created
Castaneda Edelmiro R. — Historia de las doctrinas de la población y la política demográfica
No full textHecht Jacqueline. Castaneda Edelmiro R. — Historia de las doctrinas de la población y la política demográfica. In: Population, 29ᵉ année, n°4-5, 1974. pp. 938-939
Jorge G. Castaneda. L'utopie désarmée. L'Amétique latine après la guerre froide
No full textJouineau Sophie. Jorge G. Castaneda. L'utopie désarmée. L'Amétique latine après la guerre froide. In: Politique étrangère, n°3 - 1996 - 61ᵉannée. pp. 707-708
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