United States

Integrating Large Language Models (LLMs) into software engineering unlocks new opportunities to automate manual processes but raises challenges around reliability, safety, and scalability. My research centers on this synergy, with two key objectives: first, harnessing LLMs to solve software engineering tasks traditionally dependent on labor-intensive, domain-specific methods, and second, applying robust software engineering principles to improve LLM safety and performance. This dual focus creates a powerful feedback loop, where LLMs drive innovation while engineering rigor ensures these systems meet the high standards required for real-world applications.

AAAI 2025

Advancing Intelligent Software Development and Trustworthy Models Through the Synergy of Software Engineering and LLMs

poster

We are pleased to announce the Thirty-Ninth AAAI Conference on Artificial Intelligence (AAAI-25), which will be held in Philadelphia, Pennsylvania at the Pennsylvania Convention Center from February 25 to March 4, 2025.

The purpose of the AAAI conference series is to promote research in Artificial Intelligence (AI) and foster scientific exchange between researchers, practitioners, scientists, students, and engineers across the entirety of AI and its affiliated disciplines. AAAI-25 will feature technical paper presentations, special tracks, invited speakers, workshops, tutorials, poster sessions, senior member presentations, competitions, and exhibit programs, and a range of other activities to be announced.

### [Invited Speakers](https://aaai.org/conference/aaai/aaai-25/aaai-25-invited-speakers/)

Register [here](https://aaai.org/conference/aaai/aaai-25/registration/)

The purpose of the AAAI conference series is to promote research in Artificial Intelligence (AI) and foster scientific exchange between researchers, practitioners, scientists, students, and engineers across the entirety of AI and its affiliated disciplines. AAAI-25 will feature technical paper presentations, special tracks, invited speakers, workshops, tutorials, poster sessions, senior member presentations, competitions, and exhibit programs, and a range of other activities to be announced.



Artificial Intelligence (AI) continues to evolve rapidly, impacting numerous fields, including time series (TS) classification and human activity recognition (HAR). Despite the advancements in deep learning models, such as Recurrent Neural Networks (RNNs) and Convolutional Neural Networks (CNNs), these models face several challenges, including the need for extensive labeled datasets, significant computational resources, and lack of interpretability. 
This research aims to address these limitations by developing an adaptive hierarchical deep neural network framework that integrates fuzzy logic principles and adaptive learning techniques for robust, computationally efficient, and interpretable real-time TS analysis. The reduction in the number of parameters and the efficient learning of hierarchical features mean that less training data is needed to achieve robust performance. The model's ability to generalize from hierarchical representations allows it to make effective use of smaller datasets, which is particularly advantageous in scenarios where data is limited or expensive to obtain.The proposed framework specifically targets HAR applications using data from wearable sensors.

Scalable Hierarchical Deep Neural Network for Time Series Analysis in Wearable Sensor-based Human Activity Recognition

My PhD research focuses on developing a highly accurate and explainable multi-output virtual metrology system for semiconductor manufacturing. Using machine learning, we predict the physical properties of metal layers from process parameters captured by production equipment sensors. Key contributions include a model-agnostic explanatory method based on projective operators, providing insights into the most influential features for multi-output predictions and feature selection algorithms for these tasks.

Human Interpretable Virtual Metrology in the Semiconductor Manufacturing

Foundation models in general domains have leveraged multimodal knowledge graphs to great effect, yet the healthcare sector lacks such comprehensive structures, presenting a significant gap in current research. Based on previous exploration with pure data-driven approaches, this proposal describes a two-stage project aiming to enhance multimodal healthcare foundation model with domain knowledge. The first stage is to construct a robust multimodal healthcare knowledge graph based on established healthcare taxonomies, such as UMLS, and enriched with data from multimodal clinical databases like MIMIC-CXR. This knowledge graph will incorporate medical images as cross-modal instances linked to healthcare terminologies, enhancing the depth and applicability of the graph. In the second stage, the knowledge graph will serve as a foundational tool in training healthcare foundation models with enhanced capabilities, particularly in reducing hallucination and managing concept ambiguity through the novel use of reinforcement learning techniques like Direct Preference Optimization (DPO). This research is expected to make significant contributions to the domain of healthcare AI by enabling more accurate, reliable, and explainable AI-driven diagnostics and interventions.

Developing Multimodal Healthcare Foundation Model: From Data-driven to Knowledge-enhanced

Synthesizing electronic health records (EHR) is essential for addressing data scarcity, bias, and fairness in healthcare models. EHR data are inherently multimodal and sequential, encompassing structured codes, clinical notes, medical
images, and irregular time intervals. Traditional generative models like GANs and VAEs struggle to capture these complexities, while diffusion-based models offer improvements but remain limited to task-specific applications. To address these challenges, two diffusion-based models, MedDiffusion and EHRPD, have been developed. MedDiffusion enhances health risk prediction by generating synthetic patient data
and capturing visit-level relationships, while EHRPD generates sequential, multimodal EHR data, incorporating temporal interval estimation to improve diversity and fidelity. Future work aims to overcome limitations in multimodal data generation by developing a generalized model capable of handling diverse modalities simultaneously, expanding the applicability of EHR data generation across healthcare tasks.

Advancing Medical Multimodal Learning and Data Generation with Diffusion Model and LLM

As modern network management grows increasingly complex, administrators are tasked with navigating vast volumes of log data, often resulting in inefficiencies, errors, and operational challenges. My doctoral research addresses these pressing issues by leveraging advanced AI techniques to minimize human intervention and pave the way for fully automated network operations. I propose a novel AI-driven framework that integrates Large Language Models (LLMs) with Retrieval-Augmented Generation (RAG) and a human-in-the-loop process to effectively automate key network management tasks, including log analysis, troubleshooting recommendations, and documentation generation. By enhancing the accuracy and efficiency of these tasks, this study aims to improve network reliability, reduce operational complexity, and contribute to the evolution of self-running networks.

Towards Autonomous Network Management: AI-Driven Framework for Intelligent Log Analysis, Troubleshooting and Documentation

Economic growth and development require a consistent supply of energy. Energy which has mainly been supplied from fossil fuels. The impacts of these on the environment such as global warming, raised an alarm on their use. As a result other sources of energy such as wind energy are used as alternatives for electricity production. Wind energy assessment nevertheless faces barriers due to its stochastic nature. This later creates various regimes, which traditional models can't always fit thereby producing poor estimates. In this work, we aim to use Large Language Models (LLMs) to predict the wind potential in a given location. Through this approach, we aim at lifting the barrier on energy problems in developing countries by providing knowledge on the state of wind energy in given locations.

Leveraging Large Language Models for Wind Energy Assessment

Large Language Models (LLMs) have shown promise in educational applications, but challenges such as hallucinations, lack of contextual relevance, and limited personalization impede their practical adoption. To address these issues, my research introduces MerryQuery, an LLM-powered educational agent that integrates Retrieval-Augmented Generation (RAG), rule-based content control, and Reinforcement Learning from Human Feedback (RLHF). The system features a dynamic learning profile module for adaptive personalization and a multi-step verification framework that cross-checks responses against external sources to enhance trustworthiness. A functional prototype of MerryQuery is being piloted in a real-world classroom. Preliminary results demonstrate improved response reliability and student understanding.

Developing LLM-Powered Trustworthy Agents for Personalized Learning Support

Healthcare information is scattered across heterogeneous data sources, such as patient medical records, clinical guidelines, research literature, and online knowledge bases. Segmented information, both structured and unstructured, when integrated together using context augmentation - a knowledge fusion technique, has the ability to contextualize broader medical context. Current approaches lack knowledge aggregation that is necessary to generate personalized healthcare recommendations. I propose novel AI frameworks that leverage language models and hybrid retrieval techniques to aggregate multi source knowledge, enabling the generation of contextual and accurate medical response.

Intelligent Clinical Assistant for Personalized Responses and Clinical Summaries

As the use of autonomous mobile robots expands into dynamic and complex environments, the need for them to provide understandable explanations for their actions becomes crucial. This thesis addresses the challenge of developing explainability for robot navigation by leveraging a hybrid model that combines machine learning techniques with symbolic reasoning methods. Furthermore, the thesis explores the modeling of human explanation preferences and the impact of different explanation attributes on explanation recipients' understanding, satisfaction, and trust. The goal is to integrate different explanation aspects and approaches into a unified framework to support explainable navigation in robotics.

Explainable Robot Navigation

My thesis primarily focuses on hyper-spectral image generation from frequency spectrums for downstream computer vision tasks. Hyper-spectral images are images with more than three channels commonly created by special hyper-spectral cameras or from frequency spectrums of various sensing applications such as radargrams or distributed acoustic sensing (DAS) systems. The range of frequencies considered in a frequency spectrum is typically too large to map one frequency to one image channel, i.e. we generally consider a frequency spectrum of 2500 Hz. Frequencies need to be binned together in frequency bands where each band forms one image channel. Usually, frequency bands are created either by expert knowledge or trial-and-error.
I research how filters can be trained to automatically select frequencies and bin them into frequency bands. My aim is to represent a variety of signal information and decrease noise. Signal representation is optimised for object detection on time-sequenced images with a set number of image channels. The object detection task consists of localising and classifying events in the generated hyper-spectral images. Events are typically types of intrusions, structural changes, or defined actions and structures, e.g. someone climbing a fence. Events and noise often share at least some frequencies and vary between application types.

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Advancing Intelligent Software Development and Trustworthy Models Through the Synergy of Software Engineering and LLMs

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