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🔍 javier esparza 📂 Engineering
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Engineering Preprint PDF DOI

Optimizing Dynamic Metasurface Antenna Configurations for Direction-of-Arrival and Polarization Estimation Using an Experimentally Calibrated Multiport-Network Model

Jean Tapie, Philipp del Hougne · 2026

Sensing the direction of arrival and polarization of impinging signals is a key prerequisite for beamforming and interference mitigation in modern wireless communication systems. Dynamic metasurface a…

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Engineering Preprint PDF DOI

A Replicable Robotics Awareness Method Using LLM-Enabled Robotics Interaction: Evidence from a Corporate Challenge

S. A. Prieto, M. A. Gopee, Y. Ben Arab, B. Garcia de Soto, J. Esteba, P. Olivera Brizzio · 2026

Large language models are increasingly being explored as interfaces between humans and robotic systems, yet there remains limited evidence on how such technologies can be used not only for interaction…

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Engineering Preprint PDF DOI

Visual-Tactile Peg-in-Hole Assembly Learning from Peg-out-of-Hole Disassembly

Yongqiang Zhao, Xuyang Zhang, Zhuo Chen, Matteo Leonetti, Emmanouil Spyrakos-Papastavridis, Shan Luo · 2026

Peg-in-hole (PiH) assembly is a fundamental yet challenging robotic manipulation task. While reinforcement learning (RL) has shown promise in tackling such tasks, it requires extensive exploration. In…

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Engineering Preprint PDF DOI

VLA Foundry: A Unified Framework for Training Vision-Language-Action Models

Jean Mercat, Sedrick Keh, Kushal Arora, Isabella Huang, Paarth Shah, Haruki Nishimura, Shun Iwase, Katherine Liu · 2026

We present VLA Foundry, an open-source framework that unifies LLM, VLM, and VLA training in a single codebase. Most open-source VLA efforts specialize on the action training stage, often stitching tog…

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Engineering Preprint PDF DOI

''It Is Much Safer to Be Sparse than Connected'': Safe Control of Robotic Swarm Density Dynamics with PDE-Optimization with State Constraints

Longchen Niu, Gennaro Notomista · 2026

This paper introduces a safety-critical optimization-based control strategy that leverages control Lyapunov and control barrier functions to guide the spatial density of robotic swarms governed by the…

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Engineering Preprint PDF DOI

A transformable slender microrobot inspired by nematode parasites for interventional endovascular surgery

Xin Yang, Dongliang Fan, Yunteng Ma, Yuxuan Liao, Diancheng Li, U Kei Cheang, Bo Peng, Hongqiang Wang · 2026

Cardiovascular diseases account for around 17.9 million deaths per year globally, the treatment of which is challenging considering the confined space and complex topology of the vascular network and …

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Engineering Preprint PDF DOI

Structural Limits of Soft Fusion in Multi-Warden Covert Communication

Abbas Arghavani, Subhrakanti Dey, Anders Ahlen · 2026

This paper investigates covert wireless communication with a Fusion Center (FC) that aggregates raw energy measurements from multiple Wardens via soft fusion. Extending our prior work on power-thresho…

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Engineering Preprint PDF DOI

Learning an Opponent-aware Anti-jamming Strategy via Online Convex Optimization

Liangqi Liu, Wenqiang Pu, Yingru Li, Zhi-Quan Luo · 2026

The dynamic competition against intelligent jammer systems presents a significant challenge to modern radar. Traditional active anti-jamming strategy learning methods often suffer from low sample effi…

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Engineering Preprint PDF DOI

FAS-aided Robust Anti-Jamming Communications: Continuous and Discrete Positioning Designs

Yifan Guo, Junshan Luo, Shilian Wang, Zhenhai Xu · 2026

This paper investigates the joint optimization of beamforming and antenna positions in fluid antenna system (FAS)-aided anti-jamming communications. We consider a multi-user multiple-input multiple-ou…

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Engineering Preprint PDF DOI

Human Gaze-based Dual Teacher Guidance Learning for Semi-Supervised Medical Image Segmentation

Rongjun Ge, Chong Wang, Yuxin Liu, Chunqiang Lu, Cong Xia, Yehui Jiang, Fangyi Xu, Yinsu Zhu, Daoqiang Zhang, Chengyu Liu, Yang Chen, Shuo Li, Yuting He · 2026

In the field of medical image segmentation, the scarcity of labeled data poses a major challenge for existing models to accurately perceive target regions. Compared with manual annotation, gaze data i…

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Engineering Preprint PDF DOI

Sumo: Dynamic and Generalizable Whole-Body Loco-Manipulation

John Z. Zhang, Maks Sorokin, Jan Brudigam, Brandon Hung, Stephen Phillips, Dmitry Yershov, Farzad Niroui, Tong Zhao, Leonor Fermoselle, Xinghao Zhu, Chao Cao, Duy Ta, Tao Pang, Jiuguang Wang, Preston Culbertson, Zachary Manchester, Simon Le Cleac'h · 2026

This paper presents a sim-to-real approach that enables legged robots to dynamically manipulate large and heavy objects with whole-body dexterity. Our key insight is that by performing test-time steer…

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Engineering Preprint PDF DOI

Shocks without shock capturing: Information geometric regularization of finite volume methods for Navier--Stokes-like problems

Anand Radhakrishnan, Benjamin Wilfong, Spencer H. Bryngelson, Florian Schafer · 2026

Shock waves in high-speed fluid dynamics produce near-discontinuities in the fluid momentum, density, and energy. Most contemporary works use artificial viscosity or limiters as numerical mitigation o…

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Engineering Preprint PDF DOI

Final Report, Center for Computer-Integrated Computer-Integrated Surgical Systems and Technology, NSF ERC Cooperative Agreement EEC9731748, Volume 1

Russell H. Taylor, Gregory D. Hager, Ralph Etienne-Cummings. Eric Grimson, Ron Kikinis, Cameron Riviere · 2026

In the last ten years, medical robotics has moved from the margins to the mainstream. Since the Engineering Research Center for Computer-Integrated Surgical Systems and Technology was Launched in 1998…

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Engineering Preprint PDF DOI

RoboPlayground: Democratizing Robotic Evaluation through Structured Physical Domains

Yi Ru Wang, Carter Ung, Evan Gubarev, Christopher Tan, Siddhartha Srinivasa, Dieter Fox · 2026

Evaluation of robotic manipulation systems has largely relied on fixed benchmarks authored by a small number of experts, where task instances, constraints, and success criteria are predefined and diff…

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Engineering Preprint PDF DOI

Amalgamation of Physics-Informed Neural Network and LBM for the Prediction of Unsteady Fluid Flows in Fractal-Rough Microchannels

Ganesh Sahadeo Meshram, Partha Pratim Chakrabarti, Suman Chakraborty · 2026

One of the biggest challenges in the optimization of micro-scale fluid transport phenomena is the prediction of unsteady fluid flow in the presence of rough channel walls. Even though the accuracy of …

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Engineering Preprint PDF DOI

LiPS: Lightweight Panoptic Segmentation for Resource-Constrained Robotics

Calvin Galagain, Martyna Poreba, Francois Goulette, Cyrill Stachniss · 2026

Panoptic segmentation is a key enabler for robotic perception, as it unifies semantic understanding with object-level reasoning. However, the increasing complexity of state-of-the-art models makes the…

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Engineering Preprint PDF DOI

Communications-Aware NMPC for Multi-Rotor Aerial Relay Networks Under Jamming Interference

Giuseppe Silano, Daniel Bonilla Licea, Davide Liuzza, Antonio Franchi, Martin Saska · 2026

Multi-Rotor Aerial Vehicles (MRAVs) are increasingly used in communication-dependent missions where connectivity loss directly compromises task execution. Existing anti-jamming strategies often decoup…

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Engineering Preprint PDF DOI

Bridging Computational Fluid Dynamics Algorithm and Physics-Informed Learning: SIMPLE-PINN for Incompressible Navier-Stokes Equations

Chang Wei, Yuchen Fan, Chin Chun Ooi, Jian Cheng Wong, Heyang Wang, Pao-Hsiung Chiu · 2026

Physics-informed neural networks (PINNs) have shown promise for solving partial differential equations (PDEs) by directly embedding them into the loss function. Despite their notable success, existing…

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Engineering Preprint PDF DOI

Introducing M: A Modular, Modifiable Social Robot

Victor Nikhil Antony, Zhili Gong, Yoonjae Kim, Chien-Ming Huang · 2026

We present M, an open-source, low-cost social robot platform designed to reduce platform friction that slows social robotics research by making robots easier to reproduce, modify, and deploy in real-w…

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Engineering Preprint PDF DOI

CycleULM: A unified label-free deep learning framework for ultrasound localisation microscopy

Su Yan, Clara Rodrigo Gonzalez, Vincent C. H. Leung, Herman Verinaz-Jadan, Jiakang Chen, Matthieu Toulemonde, Kai Riemer, Jipeng Yan, Clotilde Vie, Qingyuan Tan, Peter D. Weinberg, Pier Luigi Dragotti, Kevin G. Murphy, Meng-Xing Tang · 2026

Super-resolution ultrasound via microbubble (MB) localisation and tracking, also known as ultrasound localisation microscopy (ULM), can resolve microvasculature beyond the acoustic diffraction limit. …

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