Expertini Research Research

Browse Research Papers

949+ open-access research outputs.

✕ Clear
🔍 firdevs ulus 📂 Engineering 📄 Preprint
Showing 949 results for "firdevs ulus" in Engineering · Preprint
Engineering Preprint PDF DOI

Similarity Choice and Negative Scaling in Supervised Contrastive Learning for Deepfake Audio Detection

Jaskirat Sudan, Hashim Ali, Surya Subramani, Hafiz Malik · 2026

Supervised contrastive learning (SupCon) is widely used to shape representations, but has seen limited targeted study for audio deepfake detection. Existing work typically combines contrastive terms w…

Read Paper →
Engineering Preprint PDF DOI

Multi-Static ISAC Assisted by Double-Side Fluid Antenna System

Qinyuan Zheng, Pengcheng Zhu · 2026

As a pivotal usage scenario for 6G networks, integrated sensing and communication (ISAC) has emerged as a focal point of both academic and industrial research. To accommodate the heterogeneous connect…

Read Paper →
Engineering Preprint PDF DOI

Fluid Antenna Enabled Compact Ultra Massive Antenna Array for Satellite Communications

Tianyu Han, Yongxu Zhu, Gan Zheng, Pantelis-Daniel Arapoglou · 2026

Satellites provide seamless coverage and are critical for emergency communications during natural disasters. However, their performance is constrained by limited spectrum and high deployment cost. To …

Read Paper →
Engineering Preprint PDF DOI

RecoverFormer: End-to-End Contact-Aware Recovery for Humanoid Robots

Zihui Liu · 2026

Humanoid robots operating in unstructured environments must recover from unexpected disturbances-a capability that remains challenging for end-to-end control policies. We present RECOVERFORMER, a full…

Read Paper →
Engineering Preprint PDF DOI

CorridorVLA: Explicit Spatial Constraints for Generative Action Heads via Sparse Anchors

Dachong Li, ZhuangZhuang Chen, Jin Zhang, Jianqiang Li · 2026

Vision--Language--Action (VLA) models often use intermediate representations to connect multimodal inputs with continuous control, yet spatial guidance is often injected implicitly through latent feat…

Read Paper →
Engineering Preprint PDF DOI

Clinical Evaluation of a Tongue-Controlled Wrist Abduction-Adduction Assistance in a 6-DoF Upper-Limb Exoskeleton for Individuals with ALS and SCI

Juwairiya S. Khan, Mostafa Mohammadi, Alexander L. Ammitzb{o}ll, Ellen-Merete Hagen, Jakob Blicher Izabella Obal, Ana S. S. Cardoso, Oguzhan Kirtas, Rasmus L. K{ae}seler, John Rasmussen, Lotte N.S. Andreasen Struijk · 2026

Upper-limb exoskeletons (ULEs) have the potential to restore functional independence in individuals with severe motor impairments; however, the clinical relevance of wrist degrees of freedom (DoF), pa…

Read Paper →
Engineering Preprint PDF DOI

PokeVLA: Empowering Pocket-Sized Vision-Language-Action Model with Comprehensive World Knowledge Guidance

Yupeng Zheng, Xiang Li, Songen Gu, Yuhang Zheng, Shuai Tian, Weize Li, Linbo Wang, Senyu Fei, Pengfei Li, Yinfeng Gao, Zebin Xing, Yilun Chen, Qichao Zhang, Haoran Li, Wenchao Ding · 2026

Recent advances in Vision-Language-Action (VLA) models have opened new avenues for robot manipulation, yet existing methods exhibit limited efficiency and a lack of high-level knowledge and spatial aw…

Read Paper →
Engineering Preprint PDF DOI

Tri-Hybrid Beamforming Design for ISAC Systems with Reconfigurable Antennas

Jiangong Chen, Xia Lei, Yuchen Zhang, Kaitao Meng, Christos Masouros · 2026

Integrated Sensing and Communication (ISAC) systems require efficient beamforming architectures to jointly support communication and sensing functionalities. To reduce hardware overhead, Hybrid Beamfo…

Read Paper →
Engineering Preprint PDF DOI

Rank-Aware Link Adaptation for XR Tethering Groups with Realistic Tethering Link: A Multi-Offset OLLA Framework

Muhammad Ahsen, Boyan Yanakiev, Claudio Rosa, Ramoni Adeogun · 2026

We investigate higher-rank transmissions for multi-connected Extended Reality (XR) devices enabled through tethering group (TGr), in which a nearby tethering User Equipment (UE) cooperates with an XR …

Read Paper →
Engineering Preprint PDF DOI

A Tendon-Driven Wrist Abduction-Adduction Joint Improves Performance of a 5 DoF Upper Limb Exoskeleton -- Implementation and Experimental Evaluation

Juwairiya S. Khan, Mostafa Mohammadi, Alexander L. Ammitzb{o}ll, Ellen-Merete Hagen, Jakob Blicher, Izabella Obal, Ana S. S. Cardoso, Oguzhan Kirtas, Rasmus L. K{ae}seler, John Rasmussen, Lotte N.S. Andreasen Struijk · 2026

Wrist function is essential in performing activities of daily living (ADLs). However, there is limited experimental evidence on the functional impact of wrist Abduction-Adduction (Ab-Ad) joint assista…

Read Paper →
Engineering Preprint PDF DOI

Harmonizing MR Images Across 100+ Scanners: Multi-site Validation with Traveling Subjects and Real-world Protocols

Savannah P. Hays, Lianrui Zuo, Muhammad Faizyab Ali Chaudhary, Kathleen M. Bartz, Samuel W. Remedios, Jinwei Zhang, Jiachen Zhuo, Murat Bilgel, Shiv Saidha, Ellen M. Mowry, Scott D. Newsome, Jerry L. Prince, Blake E. Dewey, Aaron Carass · 2026

Reliable harmonization of heterogeneous magnetic resonance~(MR) image datasets, especially those acquired in pragmatic clinical trials, is critical to advance multi-center neuroimaging studies and tra…

Read Paper →
Engineering Preprint PDF DOI

Integrated Sensing and Communications for Low-Altitude Economy with Deterministic Sensing and Gaussian Information Signals

Xianxin Song, Xianghao Yu, Jie Xu, Derrick Wing Kwan Ng · 2026

Reliable surveillance and communication for unmanned aerial vehicles (UAVs) are crucial for enabling and sustaining the accelerated growth of the low-altitude economy. Integrated sensing and communica…

Read Paper →
Engineering Preprint PDF DOI

Cram\'{e}r-Rao Bound Optimization for Near-Field ISAC with Extended Targets

Zongyao Zhao, Zhaolin Wang, Lincong Han, Liang Xu, Jing Jin, Yuanwei Liu, Kaibin Huang · 2026

Near-field integrated sensing and communication (ISAC) requires target models beyond the point-target abstraction when the target has a non-negligible spatial extent. In this letter, a geometry-aware …

Read Paper →
Engineering Preprint PDF DOI

OFlow: Injecting Object-Aware Temporal Flow Matching for Robust Robotic Manipulation

Kuanning Wang, Ke Fan, Chenhao Qiu, Zeyu Shangguan, Yuqian Fu, Yanwei Fu, Daniel Seita, Xiangyang Xue · 2026

Robust robotic manipulation requires not only predicting how the scene evolves over time, but also recognizing task-relevant objects in complex scenes. However, existing VLA models face two limitation…

Read Paper →
Engineering Preprint PDF DOI

OmniVLA-RL: A Vision-Language-Action Model with Spatial Understanding and Online RL

Haoxiang Jie, Yaoyuan Yan, Xiangyu Wei, Kailin Wang, Hongjie Yan, Zhiyou Heng, Daocheng Chen · 2026

Visual-Language-Action (VLA) models represent a paradigm shift in embodied AI, yet existing frameworks often struggle with imprecise spatial perception, suboptimal multimodal fusion, and instability i…

Read Paper →
Engineering Preprint PDF DOI

CTSCAN: Evaluation Leakage in Chest CT Segmentation and a Reproducible Patient-Disjoint Benchmark

Anton Ivchenko · 2026

Reported chest CT segmentation performance can be strongly inflated when train and test partitions mix slices from the same study. We present CTSCAN, a reproducible multi-source chest CT benchmark and…

Read Paper →
Engineering Preprint PDF DOI

Optimal Robust Adaptive Beamforming for a General-Rank Signal Model via Equivalence of Maximin and Minimax SINR Problems

Yongwei Huang, Zhenhui Huang, Sergiy A. Vorobyov, Zhi-Quan Luo · 2026

The globally optimal robust adaptive beamforming (RAB) solution is studied for worst-case signal-to-interference-plus-noise ratio (SINR) maximization (the maximin SINR problem) under convex and closed…

Read Paper →
Engineering Preprint PDF DOI

A multi-platform LiDAR dataset for standardized forest inventory measurement at long term ecological monitoring sites

Michael R. Chang, Anna Candotti, Karl von Ellenrieder, Enrico Tomelleri, Marco Camurri · 2026

We present a curated multi-platform LiDAR reference dataset from an instrumented ICOS forest plot, explicitly designed to support calibration, benchmarking, and integration of 3D structural data with …

Read Paper →
Engineering Preprint PDF DOI

Beam Squinting Effects in Super Wideband Communication Systems

Sachitha C. Bandara, Peter J. Smith, Erfan Khordad, Pawel Dmochowski, Robin Evans, Rajitha Senanayake · 2026

Beam squint, the frequency-dependent shift of the main beam, poses a major challenge for wideband antenna arrays. This paper focuses on the beam squint effects in super wideband (SW) systems, where hi…

Read Paper →
Engineering Preprint PDF DOI

A Nonasymptotic Theory of Gain-Dependent Error Dynamics in Behavior Cloning

Junghoon Seo · 2026

Behavior cloning (BC) policies on position-controlled robots inherit the closed-loop response of the underlying PD controller, yet the effect of controller gains on BC failure lacks a nonasymptotic th…

Read Paper →
Page 1 of 48 Next →