Search Results for author: Max Hahn-Klimroth

Found 8 papers, 0 papers with code

On a Near-Optimal \& Efficient Algorithm for the Sparse Pooled Data Problem

no code implementations22 Dec 2023 Max Hahn-Klimroth, Remco van der Hofstad, Noela Müller, Connor Riddlesden

In this article, we resolve the question whether this $\log n$-gap is artificial or of a fundamental nature by the design of an efficient algorithm, called \algoname, based upon a novel pooling scheme on a number of pools very close to the information-theoretic threshold.

An unsupervised learning approach to evaluate questionnaire data -- what one can learn from violations of measurement invariance

no code implementations11 Dec 2023 Max Hahn-Klimroth, Paul W. Dierkes, Matthias W. Kleespies

In several branches of the social sciences and humanities, surveys based on standardized questionnaires are a prominent research tool.

Clustering

Efficient Approximate Recovery from Pooled Data Using Doubly Regular Pooling Schemes

no code implementations28 Feb 2023 Max Hahn-Klimroth, Dominik Kaaser, Malin Rau

In the pooled data problem we are given $n$ agents with hidden state bits, either $0$ or $1$.

Statistical and Computational Phase Transitions in Group Testing

no code implementations15 Jun 2022 Amin Coja-Oghlan, Oliver Gebhard, Max Hahn-Klimroth, Alexander S. Wein, Ilias Zadik

For the Bernoulli design, we determine the precise number of tests required to solve the associated detection problem (where the goal is to distinguish between a group testing instance and pure noise), improving both the upper and lower bounds of Truong, Aldridge, and Scarlett (2020).

Inference of a Rumor's Source in the Independent Cascade Model

no code implementations24 May 2022 Petra Berenbrink, Max Hahn-Klimroth, Dominik Kaaser, Lena Krieg, Malin Rau

In this work we present a maximum likelihood estimator for the rumor's source, given a snapshot of the process in terms of a set of active nodes $X$ after $t$ steps.

Epidemiology

Distributed Reconstruction of Noisy Pooled Data

no code implementations14 Apr 2022 Max Hahn-Klimroth, Dominik Kaaser

In the pooled data problem we are given a set of $n$ agents, each of which holds a hidden state bit, either $0$ or $1$.

Efficient and accurate group testing via Belief Propagation: an empirical study

no code implementations13 May 2021 AminCoja-Oghlan, Max Hahn-Klimroth, Philipp Loick, Manuel Penschuck

The group testing problem asks for efficient pooling schemes and algorithms that allow to screen moderately large numbers of samples for rare infections.

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