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๐Ÿ” j. rahmfeld ๐Ÿ“‚ Engineering
Showing 182 results for "j. rahmfeld" in Engineering
Engineering Preprint PDF DOI

The role of physical models in the validation and calibration of numerical models -- The example of the Lilleb{\ae}lt Bridge

Paula Apollonia Wunderlich, Gledson Rodrigo Tondo, Guido Morgenthal ยท 2026

With the rapid advancement of computer technologies enabling fast calculations of complex structures, numerical methods have become a central tool in engineering sciences, while physical models have iโ€ฆ

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Engineering Preprint PDF DOI

Defining the Magnetization State of LCF Magnets: From Material Properties to Motor-Level Metrics

Taha El Hajji, Aleksandr Nadkin, Stefan Skoog, Lars Sjoberg, Kristoffer Nilsson, Anthony C. Morcos ยท 2026

Variable flux memory motors, which employ Low Coercive Force (LCF) magnets, achieve extended high-efficiency operation through controllable magnetization states. To address the need for a unified apprโ€ฆ

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Engineering Preprint PDF DOI

Learning ultra-compressible hyperelasticity with splines: Constitutive asymmetries and non-unique representations

Miguel Angel Moreno-Mateos, Simon Wiesheier, Paul Steinmann, Ellen Kuhl ยท 2026

Highly compressible solids, such as foams, exhibit complex responses, including pronounced tension-compression asymmetry. Capturing such behaviors within unified hyperelastic frameworks remains challeโ€ฆ

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Engineering Preprint PDF DOI

A Case Study on Energy-Efficient Edge AI Crack Segmentation

Matthias Tschope, Mohamed Moursi, Vladimir Rybalkin, Bo Zhou, Norbert Wehn, Paul Lukowicz ยท 2026

Crack segmentation on edge devices can support continuous infrastructure monitoring and maintenance and thereby help to preserve public safety. Furthermore, autonomous infrastructure monitoring by usiโ€ฆ

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Engineering Preprint PDF DOI

Jutted BMOCZ for Non-Coherent OFDM

Parker Huggins, Alphan Sahin ยท 2026

In this work, we propose a zero constellation for binary modulation on conjugate-reciprocal zeros (BMOCZ), called jutted BMOCZ (J-BMOCZ), and study its application to non-coherent orthogonal frequencyโ€ฆ

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Engineering Preprint PDF DOI

A Monolithic Computational Homogenization Framework for Nearly Incompressible Magnetoelastic Composites

L. River Spencer, Manuel K. Rausch, Chad M. Landis, Jan N. Fuhg ยท 2026

Magneto-active elastomers exhibit large, nonlinear deformations under combined mechanical loading and magnetic fields, and their effective behavior is strongly governed by microstructural heterogeneitโ€ฆ

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Engineering Preprint PDF DOI

4D Fresnel Space-Time Modulation for Near-Field ELAA: Kinematic Multiplexing and O(N log N) Precoding at Sub-THz Frequencies

Rahul Gulia ยท 2026

Extremely Large Antenna Arrays (ELAA) operating at sub-terahertz frequencies introduce a regime where near-field Fresnel propagation and high-mobility carrier Doppler interact simultaneously, creatingโ€ฆ

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Engineering Preprint PDF DOI

A Single-Fiber Optical Frequency Domain Reflectometry (OFDR)-Based Shape Sensing of Concentric Tube Steerable Drilling Robots

Yash Kulkarni, Mobina Tavangarifard, Daniyal Maroufi, Mohsen Khadem, Justin E. Bird, Jeffrey H. Siewerdsen, Farshid Alambeigi ยท 2026

This paper introduces a novel shape-sensing approach for Concentric Tube Steerable Drilling Robots (CT-SDRs) based on Optical Frequency Domain Reflectometry (OFDR). Unlike traditional FBG-based methodโ€ฆ

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Engineering Preprint PDF DOI

Set-Prediction-Based J-Peak Detection for Pillow-Based Ballistocardiography

Shengwei Guo, Guobing Sun ยท 2026

J-peak detection in ballistocardiography (BCG) is a key component of unobtrusive heart rate monitoring during sleep. Most existing approaches formulate this task as a dense time-point segmentation pโ€ฆ

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Engineering Preprint PDF DOI

SilentWear: an Ultra-Low Power Wearable System for EMG-based Silent Speech Recognition

Giusy Spacone, Sebastian Frey, Giovanni Pollo, Alessio Burrello, Daniele Jahier Pagliari, Victor Kartsch, Andrea Cossettini, Luca Benini ยท 2026

Detecting speech from biosignals is gaining increasing attention due to the potential to develop human-computer interfaces that are noise-robust, privacy-preserving, and scalable for both clinical appโ€ฆ

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Engineering Preprint PDF DOI

HARU-Net: Hybrid Attention Residual U-Net for Edge-Preserving Denoising in Cone-Beam Computed Tomography

Khuram Naveed, Ruben Pauwels ยท 2026

Cone-beam computed tomography (CBCT) is widely used in dental and maxillofacial imaging, but low-dose acquisition introduces strong, spatially varying noise that degrades soft-tissue visibility and obโ€ฆ

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Engineering Preprint PDF DOI

Twenty-five years of J-DSP Online Labs for Signal Processing Classes and Workforce Development Programs

Andreas Spanias ยท 2026

This paper presents the history of the online simulation program Java-DSP (J-DSP) and the most recent function development and deployment. J-DSP was created to support online laboratories in DSP classโ€ฆ

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Engineering Preprint PDF DOI

Sub Specie Aeternitatis: Fourier Transforms from the Theory of Heat to Musical Signals

Victor Lazzarini ยท 2026

J. B. Fourier in his \emph{Th\'{e}orie Analytique de la Chaleur} of 1822 introduced, amongst other things, two ideas that have made a fundamental impact in fields as diverse as Mathematical Physics, Eโ€ฆ

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Engineering Preprint PDF DOI

From Data $H(j\omega_i)$ to Balanced Truncation Family: A Projection-based Non-intrusive Approach

Umair Zulfiqar ยท 2026

This paper presents data-driven implementations of balanced truncation and several of its generalizations that rely exclusively on transfer function samples on the imaginary axis. Rather than implicitโ€ฆ

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Engineering Preprint PDF DOI

WST-X Series: Wavelet Scattering Transform for Interpretable Speech Deepfake Detection

Xi Xuan, Davide Carbone, Wenxin Zhang, Ruchi Pandey, Tomi H. Kinnunen ยท 2026

In this work, we focus on front-end design for speech deepfake detectors, the component that determines the discriminative acoustic cues provided to the classifier. Existing approaches are primarily cโ€ฆ

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Engineering Preprint PDF DOI

Towards Efficient Image Deblurring for Edge Deployment

Srinivas Miriyala, Sowmya Vajrala, Sravanth Kodavanti ยท 2026

Image deblurring is a critical stage in mobile image signal processing pipelines, where the ability to restore fine structures and textures must be balanced with real-time constraints on edge devices.โ€ฆ

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Engineering Preprint PDF DOI

Reinforcement Learning for Follow-the-Leader Robotic Endoscopic Navigation via Synthetic Data

Sicong Gao, Chen Qian, Laurence Xian, Liao Wu, Maurice Pagnucco, Yang Song ยท 2026

Autonomous navigation is crucial for both medical and industrial endoscopic robots, enabling safe and efficient exploration of narrow tubular environments without continuous human intervention, where โ€ฆ

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Engineering Preprint PDF DOI

A New Software Tool for Generating and Visualizing Robot Self-Collision Matrices

Roshan Klein-Seetharama, Daniel Rakita ยท 2025

In robotics, it is common to check whether a given robot state results in self-intersection (i.e., a self-collision query) or to assess its distance from such an intersection (i.e., a self-proximity qโ€ฆ

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Engineering Preprint PDF DOI

A 28nm 0.22{\mu}J/token memory-compute-intensity-aware CNN-Transformer accelerator with hybrid-attention-based layer-fusion and cascaded pruning for semantic-segmentation

Pingcheng Dong, Yonghao Tan, Xuejiao Liu, Peng Luo, Yu Liu, Luhong Liang, Yitong Zhou, Di Pang, Man-To Yung, Dong Zhang, Xijie Huang, Shih-Yang Liu, Yongkun Wu, Fengshi Tian, Chi-Ying Tsui, Fengbin Tu, Kwang-Ting Cheng ยท 2025

This work presents a 28nm 13.93mm2 CNN-Transformer accelerator for semantic segmentation, achieving 3.86-to-10.91x energy reduction over previous designs. It features a hybrid attention unit, layer-fuโ€ฆ

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Engineering Preprint PDF DOI

A Geometric Task-Space Port-Hamiltonian Formulation for Redundant Manipulators

Federico Califano, Camilla Rota, Riccardo Zanella, Antonio Franchi ยท 2025

We present a novel geometric port-Hamiltonian formulation of redundant manipulators performing a differential kinematic task $\eta=J(q)\dot{q}$, where $q$ is a point on the configuration manifold, $\eโ€ฆ

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