Reference Saif-ur-Rehman, M., Ali, O., Klaes, C., & Iossifidis, I. (2025). Adaptive SpikeDeep-classifier: Self-organizing and self-supervised machine learning algorithm for online spike sorting. Neurocomputing, 655, 131370. DOI: 10.1016/j.neucom.2025.131370 Online Spike Sorting That Adapts Itself: Why Ada‑SpikeDeepClassifier Is a Big Step Toward Practical Invasive BCIs TL;DR: Ada‑SpikeDeepClassifier is a semi‑online, fully automatic spike sorting pipeline that … Read More “” »
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Marie D. Schmidt; Tobias Glasmachers; Ioannis Iossifidis Understanding how movement relates to muscle activation is a core problem in motor control and a practical challenge for rehabilitation technology. In this article, we train a Long Short-Term Memory (LSTM) model on upper-limb end-effector kinematics to predict activity across eight muscles. The model predicts muscle activity accurately … Read More “New journal article: Predicting Muscle Activity from Upper Limb Kinematics with LSTM Networks” »
Marie Dominique Schmidt; Ioannis Iossifidis Decoding motor intention early and reliably is central to responsive assistive devices and adaptive rehabilitation. In this study, we investigate how precisely movement direction and target location can be inferred from multichannel EMG signals, and how early this information becomes available relative to movement onset. We present a pipeline combining … Read More “New preprint: The Spatial and Temporal Resolution of Motor Intention in Multi-Target Prediction” »
Felix Grün; Muhammad Saif-ur-Rehman; Tobias Glasmachers; Ioannis Iossifidis Distributional reinforcement learning has delivered strong results in discrete-action benchmarks, largely driven by different ways of representing value distributions (e.g., via quantiles) and comparing them during training. In this work, we bring three prominent distributional methods—QR-DQN, IQN, and FQF—into the continuous action domain by integrating distributional critics … Read More “New paper: Invariance to Quantile Selection in Distributional Continuous Control” »
Value Iteration in Grid World Value Iteration in Grid World Grid Größe: Gamma: Theta: Initialisieren Positionen der Hindernisse (x,y Paare): Zielposition (x,y): Bellman-Gleichung für Value Iteration: V(s) = maxa Σs’ [P(s’|s,a) * (R(s,a,s’) + γ * V(s’))] Wo: V(s) der Wert des Zustands s ist P(s’|s,a) die Übergangswahrscheinlichkeit ist (hier angenommen als deterministisch, daher = … Read More “Gridworld RL” »
Visualisation-animation of BSTs, B-Trees and Red-Black-Trees. A modified version of David Galles’ visualisation of BSTs, B-Trees and Red-Black-Trees tree-visualisation A modification of David Galles’ visualisation Manual Insert: Enter one or more numbers between 0 and 999. Separate them with your favorite non-digit character sequence. Press Insert. Delete: Enter a number. Press Delete. Find: Enter a … Read More “Algorithms – Visualisation” »
Numerische Lösungsmethoden Numerische Lösungsmethoden für ODEs Vergleich von Euler- und Runge-Kutta-4-Methoden Startzeit (t_start): Endzeit (t_end): Anzahl Schritte (n_steps): Anfangswert (y0): Differentialgleichung (y\’ = f(t, y)): Berechnen und Zeichnen
Gradient Descent Visualisierung Gradient Descent Visualisierung Interaktive Visualisierung des Gradientenabstiegsverfahrens Lernrate (learning_rate): Anzahl Iterationen (iterations): Startwert (initial_w): Kostenfunktion (f(w)): Berechnen und Zeichnen Beispiel:
The upper limbs are crucial in performing daily tasks that require strength, a wide range of motion, and precision. To achieve coordinated motion, planning and timing are critical. Sensory information about the target and the current body state is essential, as well as integrating past experiences, represented by pre-learned inverse dynamics that generate associated muscle … Read More “BCCN23: The link between muscle activity and upper limb kinematics” »
