activity
20192026
most citedModeling of Spatio-Temporal Hawkes Processes with Randomized Kernels

12 citations · 35 across the 23 of their papers we have counts for

collaborators

26 papers

cs.CV2026

Personalized Face Privacy Protection From a Single Image

Zachary Yahn, Fatih Ilhan, Tiansheng Huang +5

Photos of faces uploaded online are vulnerable to malicious actors who can scrape facial images from online sources and intrude on personal privacy via unauthorized use of facial r…

cs.LG2026

Unmasking On-Policy Distillation: Where It Helps, Where It Hurts, and Why

Mohammadreza Armandpour, Fatih Ilhan, David Harrison +6

On-policy distillation offers dense, per-token supervision for training reasoning models; however, it remains unclear under which conditions this signal is beneficial and under whi…

cs.CV2026

Attention-aware Inference Optimizations for Large Vision-Language Models with Memory-efficient Decoding

Fatih Ilhan, Gaowen Liu, Ramana Rao Kompella +5

Large Vision-Language Models (VLMs) have achieved remarkable success in multi-modal reasoning, but their inference time efficiency remains a significant challenge due to the memory…

cs.CV2026

A Multi-Agent Perception-Action Alliance for Efficient Long Video Reasoning

Yichang Xu, Gaowen Liu, Ramana Rao Kompella +6

This paper presents a multi-agent perception-action exploration alliance, dubbed A4VL, for efficient long-video reasoning. A4VL operates in a multi-round perception-action explorat…

cs.LG2025

FedHFT: Efficient Federated Finetuning with Heterogeneous Edge Clients

Fatih Ilhan, Selim Furkan Tekin, Tiansheng Huang +6

Fine-tuning pre-trained large language models (LLMs) has become a common practice for personalized natural language understanding (NLU) applications on downstream tasks and domain-…

cs.CV2025

Adversarial Attention Perturbations for Large Object Detection Transformers

Zachary Yahn, Selim Furkan Tekin, Fatih Ilhan +5

Adversarial perturbations are useful tools for exposing vulnerabilities in neural networks. Existing adversarial perturbation methods for object detection are either limited to att…

cs.CV2025★ 1 cited

A Neurosymbolic Agent System for Compositional Visual Reasoning

Yichang Xu, Gaowen Liu, Ramana Rao Kompella +5

The advancement in large language models (LLMs) and large vision models has fueled the rapid progress in multi-modal vision-language reasoning capabilities. However, existing visio…

cs.CR2025

Safety Tax: Safety Alignment Makes Your Large Reasoning Models Less Reasonable

Tiansheng Huang, Sihao Hu, Fatih Ilhan +4

Safety alignment is an important procedure before the official deployment of a Large Language Model (LLM). While safety alignment has been extensively studied for LLM, there is sti…

cs.CL2025

Dynamic Optimizations of LLM Ensembles with Two-Stage Reinforcement Learning Agents

Selim Furkan Tekin, Fatih Ilhan, Gaowen Liu +2

The advancement of LLMs and their accessibility have triggered renewed interest in multi-agent reinforcement learning as robust and adaptive frameworks for dynamically changing env…

cs.CR2025

Virus: Harmful Fine-tuning Attack for Large Language Models Bypassing Guardrail Moderation

Tiansheng Huang, Sihao Hu, Fatih Ilhan +2

Recent research shows that Large Language Models (LLMs) are vulnerable to harmful fine-tuning attacks -- models lose their safety alignment ability after fine-tuning on a few harmf…

cs.CL2024

H3Fusion: Helpful, Harmless, Honest Fusion of Aligned LLMs

Selim Furkan Tekin, Fatih Ilhan, Tiansheng Huang +4

The alignment of pre-trained LLMs continues to draw significant attention from both industry and academia, aiming to ensure responses that are helpful, harmless, and honest. Howeve…

cs.CL2024

LLM-TOPLA: Efficient LLM Ensemble by Maximising Diversity

Selim Furkan Tekin, Fatih Ilhan, Tiansheng Huang +2

Combining large language models during training or at inference time has shown substantial performance gain over component LLMs. This paper presents LLM-TOPLA, a diversity-optimize…

cs.CR2024

Harmful Fine-tuning Attacks and Defenses for Large Language Models: A Survey

Tiansheng Huang, Sihao Hu, Fatih Ilhan +2

Recent research demonstrates that the nascent fine-tuning-as-a-service business model exposes serious safety concerns: fine-tuning with a few harmful data uploaded from the users c…

cs.CL2024★ 1 cited

Booster: Tackling Harmful Fine-tuning for Large Language Models via Attenuating Harmful Perturbation

Tiansheng Huang, Sihao Hu, Fatih Ilhan +2

Harmful fine-tuning attack poses serious safety concerns for large language models' fine-tuning-as-a-service. While existing defenses have been proposed to mitigate the issue, thei…

cs.LG2024

Lisa: Lazy Safety Alignment for Large Language Models against Harmful Fine-tuning Attack

Tiansheng Huang, Sihao Hu, Fatih Ilhan +2

Recent studies show that Large Language Models (LLMs) with safety alignment can be jail-broken by fine-tuning on a dataset mixed with harmful data. First time in the literature, we…

cs.CV2024

Robust Few-Shot Ensemble Learning with Focal Diversity-Based Pruning

Selim Furkan Tekin, Fatih Ilhan, Tiansheng Huang +4

This paper presents FusionShot, a focal diversity optimized few-shot ensemble learning approach for boosting the robustness and generalization performance of pre-trained few-shot m…

cs.AI2024★ 6 cited

A Survey on Large Language Model-Based Game Agents

Sihao Hu, Tiansheng Huang, Gaowen Liu +6

Game environments provide rich, controllable settings that stimulate many aspects of real-world complexity. As such, game agents offer a valuable testbed for exploring capabilities…

cs.CR2023★ 9 cited

Large Language Model-Powered Smart Contract Vulnerability Detection: New Perspectives

Sihao Hu, Tiansheng Huang, Fatih İlhan +2

This paper provides a systematic analysis of the opportunities, challenges, and potential solutions of harnessing Large Language Models (LLMs) such as GPT-4 to dig out vulnerabilit…

cs.CR2023

STDLens: Model Hijacking-Resilient Federated Learning for Object Detection

Ka-Ho Chow, Ling Liu, Wenqi Wei +2

Federated Learning (FL) has been gaining popularity as a collaborative learning framework to train deep learning-based object detection models over a distributed population of clie…

cs.LG2023★ 1 cited

Adaptive Deep Neural Network Inference Optimization with EENet

Fatih Ilhan, Ka-Ho Chow, Sihao Hu +9

Well-trained deep neural networks (DNNs) treat all test samples equally during prediction. Adaptive DNN inference with early exiting leverages the observation that some test exampl…

cs.LG2020

Markovian RNN: An Adaptive Time Series Prediction Network with HMM-based Switching for Nonstationary Environments

Fatih Ilhan, Oguzhan Karaahmetoglu, Ismail Balaban +1

We investigate nonlinear regression for nonstationary sequential data. In most real-life applications such as business domains including finance, retail, energy and economy, timese…

stat.ML2020★ 4 cited

Unsupervised Online Anomaly Detection On Irregularly Sampled Or Missing Valued Time-Series Data Using LSTM Networks

Oguzhan Karaahmetoglu, Fatih Ilhan, Ismail Balaban +1

We study anomaly detection and introduce an algorithm that processes variable length, irregularly sampled sequences or sequences with missing values. Our algorithm is fully unsuper…

cs.LG2020

Achieving Online Regression Performance of LSTMs with Simple RNNs

N. Mert Vural, Fatih Ilhan, Selim F. Yilmaz +2

Recurrent Neural Networks (RNNs) are widely used for online regression due to their ability to generalize nonlinear temporal dependencies. As an RNN model, Long-Short-Term-Memory N…

cs.LG2020★ 12 cited

Modeling of Spatio-Temporal Hawkes Processes with Randomized Kernels

Fatih Ilhan, Suleyman Serdar Kozat

We investigate spatio-temporal event analysis using point processes. Inferring the dynamics of event sequences spatiotemporally has many practical applications including crime pred…