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S. Ulukus

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Preprint Sep 2026

Distribution of Age of Information in the Erlang Loss System

In this paper, we study the exact distributions of the age of information (AoI) and peak AoI (PAoI) in a bufferless setting in which time-stamped updates, or processed tasks, generated by one or several information sources according to a Poisson process for each source, are submitted to a shared pool of $c$ homogeneous...

Nail Akar, S. Ulukus · 0 citations
Preprint Aug 2026

Local Private Information Retrieval for Graph-Based Replicated Systems

We rethink the definition of privacy in multi-server, graph-replicated private information retrieval (PIR) systems, by introducing a novel setting where the user's privacy is governed by the servers'storage structure. In classical graph-replicated PIR, the user retrieves a single message stored at the servers, while hi...

Shreya Meel, M. Nomeir, S. Ulukus · 1 citation · ⚡1
Preprint Sep 2026

Private Information Retrieval With Arbitrary Privacy Requirements: Introduction and Capacity Results

In this paper, we introduce the problem of private information retrieval (PIR) under arbitrary privacy requirements, in a graph-based storage system. This formulation is motivated by the server storage limitations, abundance of data (messages) and heterogeneous data privacy requirements. Under the arbitrary privacy req...

M. Nomeir, Shreya Meel, S. Ulukus · 0 citations
#artificial intelligence Preprint Sep 2026

GRASP: Generating, Revising, and Assessing for Strategic Planning with Agentic AI

Empirical evaluations show that GRASP consistently establishes a new state-of-the-art frontier across diverse datasets, yielding substantial accuracy gains over direct LLM planners on Natural Plan Calendar Scheduling, ZebraLogic, and SciBench Math.

Arunabh Srivastava, M. Khojastepour, Srimat T. Chakradhar et al. · 0 citations
Preprint Aug 2026

Chained Recursive Language Models for Multi-Iteration Reasoning

This work proposes Chained Recursive Language Models (Chained RLM), an inference-time architecture, in which the same underlying model is called repeatedly as a sequence of fresh reasoning roots, and studies when fresh-context artifact continuation gives a measurable gain in accuracy over direct LLM answering even with...

Purbesh Mitra, S. Ulukus · 0 citations
Preprint Aug 2026

Dependency Triad: A Metric to Quantify the Dependencies Between Attributes for Local Differential Privacy

A novel metric, ``Dependency Triad''(DT), is proposed, which summarizes the pairwise dependency information relevant to CPL using three parameters and yields a conservative estimator of pairwise CPL, which is particularly suitable for high-cardinality attributes.

Sandaru Jayawardana, S. Ulukus, Ming Ding et al. · 0 citations

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