Project Data

Yubin Park

Intelligent Data Exploration and Analysis Lab. (IDEAL) E-mail: *****.****@******.***

Contact

ACES 3.106, 1 University Station, C0803 Phone: 512-***-****

Information

Univ. of Texas, Austin, TX 78712, USA Web: http://www.ideal.ece.utexas.edu/~yubin/

The University of Texas at Austin

Education

Ph.D. student August 2011 2014 (expected)

Dept. of Electrical and Computer Engineering Advisor: Professor Joydeep Ghosh

The University of Texas at Austin

M.S.E. August 2009 December 2011

Dept. of Electrical and Computer Engineering Advisor: Professor Joydeep Ghosh

Thesis: CUDIA: A Probabilistic Cross-level Imputation Framework using Individual Auxiliary

Information . GPA:3.91/4.0

Korea Advanced Institute of Science and Technology (KAIST)

B.S. March 2002 July 2008

Dept. of Electrical Engineering GPA: 3.80/4.30

Yubin Park, Millarkarjun Shankar and Joydeep Ghosh. Link-privacy and Synthetic Data solu-

Publication

tion, (working paper)

Yubin Park Millarkarjun Shankar, and Joydeep Ghosh. Graph-representation of Medicare Sys-

tem, (working paper)

Yubin Park and Joydeep Ghosh. Lift-boosting Ensemble Tree for Imbalanced Data, JAIR,

2012, (submitted)

Yubin Park and Joydeep Ghosh. Di erentially Private Item-to-Item Recommender Systems:

Practical Implementation and Potential Risks, ICDM, 2012, (submitted)

Yubin Park and Joydeep Ghosh. CUDIA: A Probabilistic Cross-level Imputation Framework

using Individual Auxiliary Information, ACM Transactions on Intelligent Systems and Technology

(ACM TIST) special issue on Intelligent Systems for Health Informatics, 2012.

Azarias Reda, Yubin Park, Mitul Tiwari, Christian Posse, and Sam Shah. Metaphor: a system

for related search recommendations, CIKM, October 2012, Maui, Hawaii.

Yubin Park and Joydeep Ghosh. A Probabilistic Imputation Framework for Regression Analysis

using Variably Aggregated, Multi-source Healthcare Data, ACM SIGHIT International Health

Informatics Symposium 2012, January 2012, Miami, FL.

Anurekha Ramakrishnan, Yubin Park and Joydeep Ghosh. Low/High-risk Diabetes Group Seg-

mentation using -Trees, AMA-IEEE Medical Technology Conference, October 2011, Boston,

MA.

Yubin Park and Joydeep Ghosh. A Generative Framework for Predictive Modeling using Variably

Aggregated, Multi-source Healthcare Data, ACM SIGKDD 2011 Workshop on Data Mining for

Medicine and Healthcare, June 2011, San Diego, CA.

Yubin Park and Joydeep Ghosh. Compact Ensemble Trees for Imbalanced Data, 10th Inter-

national Workshop on Multiple Classi er Systems (MCS 2011), June 2011, Naples, Italy.

Comprehensive R Archive Network (CRAN) cudia package

Software

url: http://cran.r-project.org/web/packages/cudia

Oak Ridge National Laboratory (ORNL)

Work

Summer Research Intern May 2012 August 2012

Experience

To facilitate Health Informatics, two major issues need to be resolved: a) e ective representation

of complex healthcare system, and b) privacy-safe data publication and sharing. My project at

ORNL involved these two major issues.

LinkedIn Corp.

Summer Software Engineering Intern May 2011 August 2011

LinkedIn is a professional social network platform provider, located in Mountain View, CA. At

LinkedIn, my job was to develop Related Searches module, which recommends relevant search

keywords. For instance, if a user types hadoop, the engine should provide hbase, map reduce,

etc. The engine is designed using Pig, Hadoop and R, and currently now on production, improving

CTR (Click Through Ratio) 20 % and coverage 50%. Please see the SIGIR 2012 paper.

Olaworks Inc.

Embedded System Developer August 2008 August 2009

Olaworks is a high-tech startup company in South Korea, which provides object detection/recognition

solutions in images and motion pictures. My job was to import facial recognition engine into mo-

bile phones, which requires extensive knowledge of speed/memory optimization. I successfully led

LG Smartphone Project (6 months), helped Samsung Digital Camera Project, Motorola Project,

Panorama Engine Project, and developed multiple Demo applications.

Sun Microsystems

Internship January 2005 February 2005

Worked in Hardware Maintenance & Support division.

Linked Big Health Data Architecture and Analytics

Research

Supervisor: Prof. Joydeep Ghosh Aug 2012 Present

Experience

TBD

Dynamic User Demands Estimation (Lifetime Modeling)

Supervisor: Prof. Joydeep Ghosh Aug 2011 Aug 2012

Users Demands dynamically change. For example, insurance customers purchase di erent goods

as time proceeds. Using customers pro les and demand trajectory information, we are modeling

simultaneous clustering on static and dynamic features. The model is based on heterogeneous

Hidden Markov Models, and is regularized by their pro le information.

A nity estimation on items/users in the Korean handset market

Supervisor: Prof. Joydeep Ghosh Jan 2011 May 2011

Today s handset market is inundated with too many handsets, hampering users to choose the best

product. Based on handset and user pro les, we modeled their purchasing behavior and made

a recommendation engine, which can be applied in Tele- or Direct-marketing. The algorithm

performs signi cantly better than just recommending popular items, and solves a new type of

cold-start problem.

Predictive modeling of Smartphone purchases

Supervisor: Prof. Joydeep Ghosh August 2010 December 2010

Using massive amount of customer information and call data, our project covered a) prediction

on Smartphone purchase per user, b) forecast on Smartphone market size change, and c) analysis

on major clusters in Smartphone users. Currently we are looking into Bayesian a nity estimation

between users and handsets. The challenges in this project include a) handling of high dimensional

imbalanced data, b) deliberate preprocessing of data, c) interpretable results with high accuracy.

Programming Language: Python (excellent), C++, C, R (package committer and maintainer),

Skills

SAS, Java, MatLab, MySQL, Cypher (Neo4J), HTML

Language: English, Japanese, Korean (Native).

Korean Government Scholarship for Studying Abroad August 2009 July 2011

Scholarship

Prestigious scholarship in Korea since 1977.

Korean Government Scholarship for Engineering Student March 2002 July 2008

Tuition waiver for 4 years.

Extracurricular Korean Association in UT ECE CommNetS Track

President, Moderator January 2010 Present

Activities

Capital Defense Command Center

Sergeant, Military Police August 2005 August 2007

MBC University Pop Song Contest

Popular Prize August 2005

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