Publications

I am broadly interested in statistical approaches to human language processing. I am particularly interested in methods that can leverage unlabeled data or make clever use of indirect signals, so my research tends toward semi-supervised/unsupervised learning.

A Sub-Character Architecture for Korean Language Processing.
  Karl Stratos.
  EMNLP 2017, short (code, word embeddings).

Entity Identification as Multitasking.
  Karl Stratos.
  EMNLP 2017, Workshop on Structured Prediction for NLP (mention2vec).

Reconstruction of Word Embeddings from Sub-Word Parameters.
  Karl Stratos.
  EMNLP 2017, Workshop on Subword and Character Level Models in NLP.

Adversarial Adaptation of Synthetic or Stale Data.
  Young-Bum Kim, Karl Stratos, and Dongchan Kim.
  ACL 2017.

Domain Attention with an Ensemble of Experts.
  Young-Bum Kim, Karl Stratos, and Dongchan Kim.
  ACL 2017.

Frustratingly Easy Neural Domain Adaptation.
  Young-Bum Kim, Karl Stratos, and Ruhi Sarikaya.
  COLING 2016.

Domainless Adaptation by Constrained Decoding on a Schema Lattice.
  Young-Bum Kim, Karl Stratos, and Ruhi Sarikaya.
  COLING 2016.

Spectral Methods for Natural Language Processing.
  Karl Stratos.
  PhD Thesis 2016 (slides, tutorial in Part I).

Unsupervised Part-Of-Speech Tagging with Anchor Hidden Markov Models.
  Karl Stratos, Michael Collins, and Daniel Hsu.
  TACL 2016 (code, slides).

Scalable Semi-Supervised Query Classification Using Matrix Sketching.
  Young-Bum Kim, Karl Stratos, and Ruhi Sarikaya.
  ACL 2016, short.

A Probabilistic Ranking Model for Audio Stream Retrieval.
  YoungHoon Jung, Jaehwan Koo, Karl Stratos, and Luca P. Carloni.
  ICMR 2016, MARMI Workshop.

Model-Based Word Embeddings from Decompositions of Count Matrices.
  Karl Stratos, Michael Collins, and Daniel Hsu.
  ACL 2015 (code, slides).

New Transfer Learning Techniques for Disparate Label Sets.
  Young-Bum Kim, Karl Stratos, Ruhi Sarikaya, and Minwoo Jeong.
  ACL 2015.

Pre-training of Hidden-Unit CRFs.
  Young-Bum Kim, Karl Stratos, and Ruhi Sarikaya.
  ACL 2015, short.

Compact Lexicon Selection with Spectral Methods.
  Young-Bum Kim, Karl Stratos, Xiaohu Liu, and Ruhi Sarikaya.
  ACL 2015, short.

Simple Semi-Supervised POS Tagging
  Karl Stratos and Michael Collins.
  NAACL 2015, Workshop on Vector Space Modeling (code, word representations).

Weakly Supervised Slot Tagging with Partially Labeled Sequences from Web Search Click Logs.
  Young-Bum Kim, Minwoo Jeong, Karl Stratos, and Ruhi Sarikaya.
  NAACL 2015.

LN-Annote: An Alternative Approach to Information Extraction from Emails using Locally-Customized Named-Entity Recognition.
  YoungHoon Jung, Karl Stratos, and Luca P. Carloni.
  WWW 2015.

A Spectral Algorithm for Learning Class-Based n-gram Models of Natural Language
  Karl Stratos, Do-kyum Kim, Michael Collins, and Daniel Hsu.
  UAI 2014 (longer version, cca code, clustering code).

Spectral Learning of Latent-Variable PCFGs: Algorithms and Sample Complexity.
  Shay B. Cohen, Karl Stratos, Michael Collins, Dean P. Foster and Lyle Ungar.
  JMLR 2014.

Spectral Learning of Refinement HMMs.
  Karl Stratos, Alexander M. Rush, Shay B. Cohen, and Michael Collins.
  CoNLL 2013 (slides).

Experiments with Spectral Learning of Latent-Variable PCFGs.
  Shay B. Cohen, Karl Stratos, Michael Collins, Dean Foster and Lyle Ungar.
  NAACL 2013.

Spectral Learning of Latent-Variable PCFGs.
  Shay B. Cohen, Karl Stratos, Michael Collins, Dean Foster and Lyle Ungar.
  ACL 2012 (slides).

Midge: Generating Image Descriptions From Computer Vision Detections.
  Margaret Mitchell, Xufeng Han, Jesse Dodge, Alyssa Mensch, Amit Goyal, Alex Berg, Kota Yamaguchi, Tamara Berg, Karl Stratos, and Hal Daumé III.
  EACL 2012.

Understanding and Predicting Importance in Images.
  Alexander C. Berg, Tamara L. Berg, Hal Daumé III, Jesse Dodge, Amit Goyal, Xufeng Han, Alyssa Mensch, Margaret Mitchell, Aneesh Sood, Karl Stratos, Kota Yamaguchi
  CVPR 2012.

Episodic Logic: Natural Logic + Reasoning.
  Karl Stratos, Lenhart K. Schubert, and Jonathan Gordon.
  KEOD 2011.

Towards Adequate Knowledge and Natural Inference.
  Lenhart Schubert, Jonathan Gordon, Karl Stratos, and Adina Rubinoff.
  AAAI 2011, Fall Symposium on Advances in Cognitive Systems.

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