Hong Kong Polytechnic University

Decentralized Solar-Driven Plant Factories Secure an Adequate Global Vegetable Supply beyond the Electricity Grid and Water Limitations

Abstract Conventional open-field vegetable production is increasingly constrained by climate volatility and natural resource endowments, creating supply instabilities and shortages that threaten global food resilience and human health. Here, we integrate solar photovoltaics and a...

AI-accelerated scalable synthesis of nanocrystals for cost-effective photovoltaics

Metal halide perovskite nanocrystals (PNCs) are promising candidates for next-generation optoelectronics. However, their commercial application necessitates low-cost synthesis and processing methods that surpass conventional lab-scale techniques. To address this, we report a liga...

CLIR: Liveness-Driven and Structure-Aware Fuzzing for the Cranelift Compiler

Modern compilers are complex software systems that must correctly translate high-level programming languages into machine code across multiple architectures. Cranelift, a fast and modern compiler backend originally developed for WebAssembly and recently adopted as an experimental...

Belobog: Move Language Fuzzing Framework for Real-World Smart Contracts

Move is a resource-oriented programming language designed for secure and verifiable smart contract development and has been widely used in managing billions of digital assets in blockchains, such as Sui and Aptos.Move features a strong static type system and explicit resource sem...

CausalRepair: Bridging the Causality Gap in Large Language Model-Based Automated Program Repair via Dual-Slicing

Automated Program Repair (APR) aims to automatically fix buggy programs. In recent years, with the rapid advancement of Large Language Models (LLMs), LLM-based APR techniques have achieved significant progress. Despite their potential, the effectiveness of LLMs relies heavily on...

EventSpec: Defining and Detecting Event-Semantic Issues in Blockchain Ecosystems

In recent years, smart contracts have become the backbone of decentralized applications (DApps), and off-chain systems such as bridges, wallets, and indexers rely heavily on event logs to track contract execution and state changes. However, the Ethereum Virtual Machine (EVM) does...

Radiance-Field Guided Pretraining: Scaling Localization Models with Unlabeled Wireless Signals

Radio frequency (RF)-based indoor localization offers significant promise for applications such as indoor navigation, augmented reality, and pervasive computing. While deep learning has greatly enhanced localization accuracy and robustness, existing models still struggle with cro...

Stochastic mesoscale modeling of chloride ingress in coastal concrete structures under climate change

Climate change is intensifying chloride-induced corrosion in marine reinforced concrete (RC) structures, yet conventional durability assessment fails to capture the coupled effects of material heterogeneity, environmental variability, and thermo-hygro-ionic transport. This paper...

How Ions Reshape the Infrared Spectra of Aqueous NaCl

Abstract Infrared (IR) spectroscopy probes the hydrogen-bond structure of electrolyte solutions, yet relating spectra to molecular mechanisms is challenging. We combine machine-learning molecular dynamics with a deep Wannier model to compute concentration-dependent IR spectra of...

HotSAM: A Hotspot-Spatial-Adaptive Multi-Resolution framework for efficient long-term deformation monitoring in terrestrial radar interferometry

Long-term deformation monitoring using ground-based interferometric radar (GBIR) inherently generates massive datasets. Current full-resolution processing paradigms face severe computational and storage bottlenecks, primarily because they expend equal resources on vast stable are...

ViT-radiomics fusion for lymph node classification in ultrasound images: a multicenter study

Abstract Background Ultrasound (US) is widely used for assessing lymph node (LN) status, but its diagnostic accuracy remains highly operator dependent. A robust computer-assisted diagnostic model may enhance clinical performance and improve inter-operator and inter-center consist...

State-bounded directional accumulation in post-liquefaction sand: A hypoplastic formulation for asymmetric cyclic deformation

Experiments on saturated sand show finite, bilateral post-liquefaction strain accumulation with a larger strain excursion on the triaxial-extension (TE) than on the triaxial-compression (TC) side, whereas existing constitutive treatments still struggle to reproduce this asymmetri...

Deep Transformation Model

The increasing data complexity leads to the demand for more general and flexible modeling approaches. We consider a nonparametric transformation model with weak assumptions, which encompasses many popular models as special cases. A rank-based deep neural network (DNN) estimation...

Embodied Sensing for Closed-Loop Manipulation in an Integrated Magnetic Soft Robot

Abstract Precision manipulation of magnetic soft robots holds great promise for applications in complex and confined environments, where a single robot could perform diverse tasks on different target objects. However, existing sensing strategies predominantly emphasize the detect...

Design scheme and experimental investigation for a 100 kW-class CO2 axial turbine-generator

Hundred-kilowatt-scale supercritical carbon dioxide (sCO 2 ) cycles are viable solutions for distributed generation and waste heat recovery owing to their high efficiency and compactness. The sCO 2 turbine is a core component of the cycle, playing a decisive role in overall syste...

Exploring the adoption of wearable physical activity monitoring technology amongst older adults in Hong Kong: a grounded theory approach

This study explored the attitudes and experiences of older adults who had used Wearable Physical Activity Monitoring Technology (WPAMT) for at least 30 days, identifying factors influencing continued use and discontinuation. Employing grounded theory, face-to-face interviews with...

School Relational Cohesion, Gender-inequitable Attitudes, and Bullying Perpetration Across 15 Education Systems: Less Bullying Overall Without a Weaker Attitude-behavior Link

Abstract Gender-inequitable attitudes are consistently associated with bullying perpetration, yet whether supportive schools weaken the link between those attitudes and behavior, or only lower the overall level of perpetration, remains unclear. Data came from the older cohort of...

FS-GSR: Graph-based scoring and sparse reconstruction for group streaming feature selection

Abstract High-dimensional data often presents the core challenge of features arriving dynamically in grouped streams. This paper proposes a novel feature selection algorithm named Feature Selection with Group Streaming via Graph-based Scoring and Sparse Reconstruction (FS-GSR). T...

"When I see Jodie, I feel relaxed": Examining the Impact of a Virtual Supporter in Remote Psychotherapy

Virtual agents have shown promising potential in mental health applications, but current research has predominantly focused on contexts outside of traditional therapy sessions. This paper examines the impact of a virtual supporter in remote psychotherapy sessions conducted via Zo...

Unexpectedly High Levels of Environmentally Persistent Free Radicals in Barbecued Foods: An Overlooked Source

Abstract Environmentally persistent free radicals (EPFRs) are recognized oxidative stressors, but existing research focuses predominantly on inhalable particles. Thermally carbonized foods represent a potentially major, yet unexplored, dietary EPFR pathway. Here, we quantified EP...