Anna Stróż

University of Warsaw | UW · Interdisciplinary Doctoral School

Actigraphy is a simple and non-invasive method of monitoring human motor activity. While the recordings are obtained from accelerometers in a simple manner, the analysis and interpretation of the recorded data still pose a challenge, as the results presented in the literature are usually obtained with different approaches, seldom fully described or...

Actigraphy is a well-known, inexpensive method to investigate human movement patterns. Sleep and circadian rhythm studies are among the most popular applications of actigraphy. In this study, we investigate seven common sleep-wake scoring algorithms designed for actigraphic data, namely Cole-Kripke algorithm, two versions of Sadeh algorithm, Sazono...

Matching Pursuit (MP) is an adaptive algorithm proposed by Mallat and Zhang in 1993 for generating a sub-optimal solution of NP-hard problem of finding optimal approximation of signal from a redundant set (dictionary) D using an iterative (greedy) procedure. Since the first practical applications researched at the Faculty of Physics in University...

Chatbots are used frequently in business to facilitate various processes,particularly those related to customer service and personalization. In this article,we propose novel methods of tracking human-chatbot interactions and measuringchatbot performance that take into consideration ethical concerns, particularlytrust. Our proposed methodology links...

Disorders of consciousness (DOC) are among the major challenges of contemporary medicine. Currently, clinical diagnosis of DOC is based upon behavioural scales like Coma Recovery Scale-Revised, which involves visual assessment of patient’s reactions. However, lack of communication with DOC patients, their potential sensory impairments, and fluctuat...

In the pursuit to clarify the concept of "BCI illiteracy", we investigated the possibilities of attaining basic binary (yes/no) communication via brain‑computer interface (BCI). We tested four BCI paradigms: steady‑state visual evoked potentials (SSVEP), tactile, visual, and auditory evoked potentials (P300). The proposed criterion for assessing fo...

In this study I present a model for an evaluation of sleep-wake patterns (also known as circadian rhythms) in patients with disorders of consciousness: unresponsive wakefulness syndrome (UWS) and minimally conscious state (MCS). The research is motivated by the hypothesis that there is a significant difference between these two states that may be s...

Przegląd różnych klasyfikatorów wykrywajacych aktywność przy bodzcu słuchowym. Następnie zaprojektowanie systemów komunikacji dla osób o ograniczonej motoryce Examining different classifiers for detecting EEG activity connected to the selection of a certain auditory event. Finally based on the results designing two systems of communication for peo...

[Presentation language: polish] I propose a model for an evaluation of sleep-wake patterns in patients with severe disorders of consciousness, such as unresponsive wakefulness syndrome (UWS) or minimally conscious state (MCS). Outline of presentation: 1. Introduction to disorders of consciousness: UWS, MCS. 2. Circadian profiles analysis. Polyso...