Influencing brain waves by evoked potentials as biometric approach: taking stock of the last six years of research

The scientific advances of recent years have made available to anyone affordable hardware devices capable of doing something unthinkable until a few years ago, the reading of brain waves. It means that through small wearable devices it is possible to perform an electroencephalography (EEG), albeit with less potential than those offered by high-cost professional devices. Such devices make it possible for researchers a huge number of experiments that were once impossible in many areas due to the high costs of the necessary hardware. Many studies in the literature explore the use of EEG data as a biometric approach for people identification, but, unfortunately, it presents problems mainly related to the difficulty of extracting unique and stable patterns from users, despite the adoption of sophisticated techniques. An approach to face this problem is based on the evoked potentials (EPs), external stimuli applied during the EEG reading, a noninvasive technique used for many years in clinical routine, in combination with other diagnostic tests, to evaluate the electrical activity related to some areas of the brain and spinal cord to diagnose neurological disorders. In consideration of the growing number of works in the literature that combine the EEG and EP approaches for biometric purposes, this work aims to evaluate the practical feasibility of such approaches as reliable biometric instruments for user identification by surveying the state of the art of the last 6 years, also providing an overview of the elements and concepts related to this research area

Annual Report of Undergraduate Research Fellows, August 2010 to May 2011

Annual Report of Undergraduate Research Fellows from August 2010 to May 2011

Weight stigma and motivation to exercise : exploring associations and constructs from the basic needs theory.

Social influences, such as weight stigma, perpetuate rates of overweight and obesity, as well as contribute to poor physical and psychological health. It has been postulated that weight stigma negatively affects motivation to exercise, though the literature is mixed and underlying mechanisms of action are not well conceived. The present study aimed to: (1) explore the relationship between frequency of experienced weight stigma and exercise motivation and behavior (2) assess how frequency of experienced weight stigma might differ based on participant characteristics such as body weight and (3) consider unique associations between frequency of personal experiences with weight-based stigma, exercise motivation, and psychological need satisfaction (autonomy, competence, and relatedness) as outlined by the Basic Needs Theory. Exploration and clarification of these relationships will inform future longitudinal studies that can test the proposed conceptual model which suggests that psychological need satisfaction may mediate the relationship between experienced weight stigma and motivation to exercise. Participants were 144 women recruited through online platforms, such as Facebook, as well as a local farmer’s market. The present study utilized a cross-sectional study design and online self-report measures. Participant weight was obtained through self-report, as well as objective methods, as possible. Frequency of experienced weight stigma was not associated with intention to exercise; however, it was positively associated with motivation to avoid exercise and controlled (extrinsic) exercise motivation style and negatively associated with exercise behavior. Individuals with worse health status and those of higher body weight endorsed more frequent experiences with weight stigma situations. Those who endorsed more frequent experiences with weight stigma also endorsed less satisfaction of psychological needs, with the exception of exercise relatedness. Multivariate findings suggested that perceived exercise competence may be most influential with regard to intention to exercise. Results offer partial support for the proposed conceptual model and highlight the need for further exploration of the weight stigma-exercise motivation relationship, with specific focus on mechanisms of action. This research has numerous clinical and research implications. Findings from the present study can inform intervention to increase exercise motivation and behavior, promote adaptive coping and buffer from the negative effects of weight stigma

STK /WST 795 Research Reports

These documents contain the honours research reports for each year for the Department of Statistics.Honours Research Reports - University of Pretoria 20XXStatisticsBSs (Hons) Mathematical Statistics, BCom (Hons) Statistics, BCom (Hons) Mathematical StatisticsUnrestricte

Characterisation of the KATRIN tritium source and evaluation of systematic effects

The Karlsruhe Tritium Neutrino (KATRIN) Experiment aims to measure the effective electron antineutrino mass with a sensitivity of 200 meV (90 % C. L.) by analysing the kinematic endpoint of the tritium beta-electron spectrum. In this thesis, the systematic effects of KATRIN are evaluated. Since most of them are linked to the tritium source, the source cryostat performance is fully characterised in this work. With a dedicated measurement campaign performed with krypton-83m, energy scale-related systematic effects are investigated and the great capabilities of KATRIN in high-resolution spectroscopy of keV-scale electrons are demonstrated

Treatment of Later Humoral Rejection with Anti-CD20 Monoclonal Antibody Rituximab: A Single Centre Experience

Humoral or vascular rejection is a B cell-mediated production of immunoglobulin (Ig) G antibody against a transplanted organ that results in immune complex deposition on the vascular endothelium, activation of the complement cascade, production of endothelial dysfunction and regional ischaemic injury

2019 Oklahoma Research Day Full Program

Oklahoma Research Day 2019 - SWOSU Celebrating 20 years of Undergraduate Research Successes

Activities in nuclear engineering at M.I.T.

"List of graduate theses (September 1989 to June 1991)"--Pages [132]-[140]Progress report; September 199