Joshua Peng's Email Addresses & Phone Numbers

📖 Summary

Software Engineer 2 @ eBay Audience Capabilities TeamGlobal Growth SeattleSoftware Engineer 1 @ eBay Shopping Experience Team, Front-end Platform TeamNew Product Development SeattleGraduate Student @ Master of Science in Predictive Analytics • Built and evaluated logistic regression, linear discriminant analysis, random forest, gradient boosting, support vector machine, deep learning, and ensemble models using R to aggregate customer segments in bank marketing data• Built and compared L1/L2 regularization, natural/smoothing splines, neural network, support vector machine, random forest, and boosting models using R to predict donors and donation amounts from charity donations data• Designed clusterwise regression algorithm in R to identify hourly rate differences across genders in Seattle wages data• Applied regression, zero inflated poisson/negative binomial regression, cluster, factor, principal component, and survival analyses with SAS on baseball statistics, car insurance, home equity, abalone, wine sales, and recidivism data• Developed web scrapers in Python to create dynamic updating word clouds from live Twitter feeds• Utilized Hue, Hive, Pig, MongoDB, and Mahout to analyze, query, and manage food inspections, city traffic, and speed dating data on a single node cluster• Used Python, MongoDB, and PostgreSQL to access and manipulate text data in the Enron email archive From June 2015 to June 2016 (1 year 1 month) Chicago, IllinoisLab Research Assistant @ Center for Bionic Medicine • Generated a novel dataset of transitional walking patterns to enhance intent recognition in active knee prostheses• Combined 250 electromyography, kinematics, kinetics signals from 3D motion capture expts for enriched sensor fusion • Wrote scalable, automated batch processing scripts in Matlab for large-scale data cleaning and analyses• Built pattern recognition models to predict transitions between ambulation modes (e.g. level ground walking to stair ascent)• Designed and constructed a custom transportable staircase with embedded force platforms to measure ground reaction forces on stairsteps• Authored multiple experiment protocol and consent forms approved by Northwestern University Institutional Review Board for human subjects research• Published in the Journal of Biomechanics (December 2015) for an article entitled, “Anticipatory mechanics and muscle activity preceding transitions from level ground walking to stair ascent and descent” From August 2010 to January 2016 (5 years 6 months) Rehabilitation Institute of ChicagoGraduate Student @ Master of Science in Biomedical Engineering • Determined optimal electromyography sampling rates for pattern recognition myoelectric control with linear discriminant analysis, multilayer perceptron, and support vector machine classifiers in Matlab• Developed simulations of biped walking robots and pendulum linkage systems incorporating rigid body mechanics and impact dynamics in Mathematica• Conducted a statistical experiment using a crossover model with two factors with SPSS and Minitab to compare signal-to-noise ratios between electromyography electrodes• Designed a robotic sensing system to locate objects underwater with an electric field emitter and sensor using C and Processing (http://hades.mech.northwestern.edu/index.php/Variable_Frequency_Electrosense) From September 2009 to September 2014 (5 years 1 month) Evanston, IllinoisMissionary Intern / IT and Administrative Assistant @ Cru • Led student small groups, mentored local students, and organized social/team events • Translated documents for the national, regional, city, and local leadership teams • Performed IT security audits, installed/configured software on new computers, and repaired computers• Provided technical support for internet/email settings, network configuration, and hard drive encryption From August 2006 to July 2008 (2 years) Asia RegionUndergraduate Research Assistant @ Biomedical Informatics Lab • Wrote automated programs to assess the visibility and severity of post-operative breast reconstructive surgery scars from clinical photographs• Developed a suite of quantitative, analytical tools that improved the validity and efficiency of decision-making process for breast reconstruction• Received 2005 Undergraduate Research Fellowship Scholarship for a paper entitled, “Quantitative Visibility Measurements of Breast Surgical Scars from Clinical Photographs” From June 2004 to February 2005 (9 months) Austin, TexasCommunications Branch Intern @ NASA Johnson Space Center • Converted workstations to a more automated network protocol• Reorganized and reallocated segments of the internal workstation From June 2002 to August 2002 (3 months) Houston, Texas