Author Note. I would like to acknowledge Maarten De Schuymer, who conducted early explorations of the effects of high-pass filtering that helped to initiate the current work. I am also grateful to Lisa Spiering for assisting with the MSEC correction and Werner Sommer for providing an excellent working environment. Collection of one of the datasets was supported by a grant from DFG (FG-868-A2). Comments or corrections are highly appreciated. ICA of free viewing EEG ABSTRACTCombining EEG with eye-tracking is a promising approach to study neural correlates of natural vision, but the resulting recordings are also heavily contaminated by activity of the eye balls, eye lids, and extraocular muscles. While Independent Component Analysis (ICA) is commonly used to suppress these ocular artifacts, its performance under free viewing conditions has not been systematically evaluated and many published findings display residual artifacts. Here I evaluated and optimized ICA-based correction for two tasks with unconstrained eye movements: visual search in images and sentence reading. In a first step, four parameters of the ICA pipeline were systematically varied: the (1) high-pass and (2) low-pass filter applied to the training data, (3) the proportion of training data containing myogenic saccadic spike potentials (SP), and (4) the threshold for eye tracker-based component rejection. In a second step, the eyetracker was used to objectively quantify correction quality of each ICA solution, both in terms of undercorrection (residual artifacts) and overcorrection (removal of neurogenic activity). As a benchmark, results were compared to those obtained with an alternative spatial filter, Multiple Source Eye Correction (MSEC). With commonly used settings, Infomax ICA not only left artifacts in the data of both tasks, but also distorted neurogenic activity during eye movementfree intervals. However, correction could be drastically improved by training the ICA on optimally filtered data in which SPs were massively overweighted. With optimized procedures, ICA removed virtually all artifacts, including the SP and its associated spectral broadband artifact, with little distortion of neural activity. It also outperformed MSEC in terms of SP correction. Matlab code is provided.
Social sciences are interested in ethnic entrepreneurship as a chance for migrants to (better) integrate into the host labour market, and in consequence into a host society. Th e multidimensional models capture a wide range of factors at the bottom of the economic behaviour of migrant entrepreneurs, and they increasingly consider that migrants might profi t in business from sustaing their social ties with the country of their origin. Looking at Polish migrant entrepreneurs in eastern German regions bordering to Poland we plead for a relational perspective which considers migrants' business activities in relation to the patterns of trans-border residential mobility and complex social and economic transformations in Polish and German border regions.
Инге Хинтервальднер -профессор отделения теории образа и истории искусства. Университет им. Гумбольдта. В исследовании рассматриваются такие аспекты симуляции, как конструирование, обусловленность правилами, моделирование, а также их представленность через образы. Оно сосредоточено на специфике вызовов, которые возникают в связи с приданием формы и выражением симуляций в режиме реального времени. Начать возможную продуктивную дискуссию и заложить основы эстетики компьютерной симуляции получится тогда, когда распространенные в медиатеории скептические позиции относительно термина «симуляция» будут рассмотрены с точки зрения их потенциальной применимости и очерчены соответствующие границы. Подчеркивается, что технические определения должны быть дополнены критической оценкой. В представленных фрагментах не обсуждаются отдельные примеры симуляций, речь идет о медиуме компьютерной симуляции в общем смысле, для пояснения привлекаются идеи представителей как гуманитарных, так и технических специальностей. Ключевые слова: цифровое изображение, моделирование, система, динамизм, время Симуляция и оспариваемая способность репрезентацииЧасто можно встретить мнение, что в случае синтетических изображений вообще и в особенности в отношении изображений, полученных путем симуляции, в частности функция репрезентации больше не работает. Поскольку никакое другое ограничение не описывает обозначенную область мира цифровых изображений более точно, приходится предположить, что, чтобы прийти к этому выводу, необходимо принять возможность абстрагироваться от любого намерения и любого взаимодействия с изображениями и средствами отображения.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.