University of Memphis

About: University of Memphis is a education organization based out in Memphis, Tennessee, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 7710 authors who have published 20082 publications receiving 611618 citations. The organization is also known as: U of M.

Learning Representations from EEG with Deep Recurrent-Convolutional Neural Networks

Abstract: One of the challenges in modeling cognitive events from electroencephalogram (EEG) data is finding representations that are invariant to inter- and intra-subject differences, as well as to inherent noise associated with such data. Herein, we propose a novel approach for learning such representations from multi-channel EEG time-series, and demonstrate its advantages in the context of mental load classification task. First, we transform EEG activities into a sequence of topology-preserving multi-spectral images, as opposed to standard EEG analysis techniques that ignore such spatial information. Next, we train a deep recurrent-convolutional network inspired by state-of-the-art video classification to learn robust representations from the sequence of images. The proposed approach is designed to preserve the spatial, spectral, and temporal structure of EEG which leads to finding features that are less sensitive to variations and distortions within each dimension. Empirical evaluation on the cognitive load classification task demonstrated significant improvements in classification accuracy over current state-of-the-art approaches in this field.

Determinants of charitable donation intentions: a structural equation model†

Abstract: Currently charities have to depend more on individual donors and less on the government for funding. Hence, understanding the individual donor and what motivates them to contribute to charities is something, which has been of increasing interest to nonprofit marketers. In this article, a path model for the charitable donation process of a religious individual is developed and tested. The variables that are used in the model are religiosity, attitude towards helping others (AHO), attitude towards charitable organizations (ACO), attitude towards the advertisement (Attad) and behavioral intentions (BI). The results suggest that AHO by itself does not cause BI. Altruistic people need to be targeted with an appropriate advertisement message. Since religiosity is an important causal variable for AHO, segmenting and targeting individuals who are religious would be pertinent. Attempts to build favorable ACO would also be worthwhile. Religiosity Charitable donation intentions Charity advertisements. Path model for predicting intentions to donate. Copyright © 2007 John Wiley & Sons, Ltd.

Psychological distress, well-being, and legal recognition in same-sex couple relationships.

Abstract: Legal recognition of same-sex couple relationships provides at least some material benefits to couple members; however, few studies have examined the associations between legal recognition and psychological distress or well-being. Using an online survey sample of 2,677 lesbian, gay, bisexual (LGB) individuals, participants were placed in 4 groups: single, dating, in a committed relationship, and in a legally recognized relationship. Analyses revealed that participants in committed or legally recognized relationships reported less psychological distress (i.e., internalized homophobia, depressive symptoms, and stress) and more well-being (i.e., the presence of meaning in life) than single participants. Significant group differences and multivariate analyses indicated that participants in a legally recognized relationship reported less internalized homophobia, fewer depressive symptoms, lower levels of stress, and more meaning in their lives than those in committed relationships, even after controlling for other factors. The need for further research on the psychological benefits of legal relationship recognition for same-sex couples is discussed.

Soil Oxidation-Reduction in Wetlands and Its Impact on Plant Functioning

Abstract: Soil flooding in wetlands is accompanied by changes in soil physical and chemical characteristics. These changes include the lowering of soil redox potential (Eh) leading to increasing demand for oxygen within the soil profile as well as production of soil phytotoxins that are by-products of soil reduction and thus, imposing potentially severe stress on plant roots. Various methods are utilized for quantifying plant responses to reducing soil conditions that include measurement of radial oxygen transport, plant enzymatic responses, and assessment of anatomical/morphological changes. However, the chemical properties and reducing nature of soil environment in which plant roots are grown, including oxygen demand, and other associated processes that occur in wetland soils, pose a challenge to evaluation and comparison of plant responses that are reported in the literature. This review emphasizes soil-plant interactions in wetlands, drawing attention to the importance of quantifying the intensity and capacity of soil reduction for proper evaluation of wetland plant responses, particularly at the process and whole-plant levels. Furthermore, while root oxygen-deficiency may partially account for plant stress responses, the importance of soil phytotoxins, produced as by-products of low soil Eh conditions, is discussed and the need for development of methods to allow differentiation of plant responses to reduced or anaerobic soil conditions vs. soil phytotoxins is emphasized.