Search Results for author: Shyam Visweswaran

Found 16 papers, 4 papers with code

MedSyn: Text-guided Anatomy-aware Synthesis of High-Fidelity 3D CT Images

no code implementations5 Oct 2023 Yanwu Xu, Li Sun, Wei Peng, Shyam Visweswaran, Kayhan Batmanghelich

This study focuses on two main objectives: (1) the development of a method for creating images based on textual prompts and anatomical components, and (2) the capability to generate new images conditioning on anatomical elements.

Anatomy Image Generation +1

An Empirical Evaluation of Prompting Strategies for Large Language Models in Zero-Shot Clinical Natural Language Processing

no code implementations14 Sep 2023 Sonish Sivarajkumar, Mark Kelley, Alyssa Samolyk-Mazzanti, Shyam Visweswaran, Yanshan Wang

To the best of our knowledge, this is one of the first works on the empirical evaluation of different prompt engineering approaches for clinical NLP in this era of generative AI, and we hope that it will inspire and inform future research in this area.

Attribute Attribute Extraction +4

Mining Clinical Notes for Physical Rehabilitation Exercise Information: Natural Language Processing Algorithm Development and Validation Study

no code implementations22 Mar 2023 Sonish Sivarajkumar, Fengyi Gao, Parker E. Denny, Bayan M. Aldhahwani, Shyam Visweswaran, Allyn Bove, Yanshan Wang

Objective: This study aims to develop and evaluate a variety of NLP algorithms to extract and categorize physical rehabilitation exercise information from the clinical notes of post-stroke patients treated at the University of Pittsburgh Medical Center.

Language Modelling Large Language Model +1

Hyperbolic Molecular Representation Learning for Drug Repositioning

no code implementations6 Jul 2022 Ke Yu, Shyam Visweswaran, Kayhan Batmanghelich

We use the Variational Auto-Encoder (VAE) framework to encode the chemical structures of molecules and use the drug-drug similarity information obtained from the hierarchy to induce the clustering of drugs in hyperbolic space.

molecular representation Representation Learning

Semi-Supervised Hierarchical Drug Embedding in Hyperbolic Space

1 code implementation1 Jun 2020 Ke Yu, Shyam Visweswaran, Kayhan Batmanghelich

We use the Variational Auto-Encoder (VAE) framework to encode the chemical structures of molecules and use the knowledge-based drug-drug similarity to induce the clustering of drugs in hyperbolic space.

Clustering

Dirac Delta Regression: Conditional Density Estimation with Clinical Trials

1 code implementation24 May 2019 Eric V. Strobl, Shyam Visweswaran

Personalized medicine seeks to identify the causal effect of treatment for a particular patient as opposed to a clinical population at large.

Causal Inference Density Estimation +1

Approximate Kernel-based Conditional Independence Tests for Fast Non-Parametric Causal Discovery

no code implementations13 Feb 2017 Eric V. Strobl, Kun Zhang, Shyam Visweswaran

Constraint-based causal discovery (CCD) algorithms require fast and accurate conditional independence (CI) testing.

Causal Discovery

Estimating and Controlling the False Discovery Rate for the PC Algorithm Using Edge-Specific P-Values

1 code implementation14 Jul 2016 Eric V. Strobl, Peter L. Spirtes, Shyam Visweswaran

The PC algorithm allows investigators to estimate a complete partially directed acyclic graph (CPDAG) from a finite dataset, but few groups have investigated strategies for estimating and controlling the false discovery rate (FDR) of the edges in the CPDAG.

Markov Boundary Discovery with Ridge Regularized Linear Models

no code implementations14 Sep 2015 Eric V. Strobl, Shyam Visweswaran

Ridge regularized linear models (RRLMs), such as ridge regression and the SVM, are a popular group of methods that are used in conjunction with coefficient hypothesis testing to discover explanatory variables with a significant multivariate association to a response.

Causal Inference Dimensionality Reduction +1

Dependence versus Conditional Dependence in Local Causal Discovery from Gene Expression Data

1 code implementation28 Jul 2014 Eric V. Strobl, Shyam Visweswaran

However, the proposed algorithm using a CDM outperforms the proposed algorithm using a DM only when sample sizes are above several hundred.

Causal Discovery

Counting Markov Blanket Structures

no code implementations9 Jul 2014 Shyam Visweswaran, Gregory F. Cooper

Learning Markov blanket (MB) structures has proven useful in performing feature selection, learning Bayesian networks (BNs), and discovering causal relationships.

feature selection

Markov Blanket Ranking using Kernel-based Conditional Dependence Measures

no code implementations1 Feb 2014 Eric V. Strobl, Shyam Visweswaran

Developing feature selection algorithms that move beyond a pure correlational to a more causal analysis of observational data is an important problem in the sciences.

feature selection

Deep Multiple Kernel Learning

no code implementations11 Oct 2013 Eric Strobl, Shyam Visweswaran

Deep learning methods have predominantly been applied to large artificial neural networks.

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