Skip to main content
Menu
Close Search

Semhar Michael

Photo of Semhar Michael
Title Assistant Professor of Statistics
Office Building Architecture, Mathematics & Engineering Building
Room Number 264
Mailing Address South Dakota State University
Mathematics & Statistics
SAME 264, Box 2225
Brookings, SD 57007

I am an applied statistician by training. My research focuses on computational statistics with an emphasis on developing novel methodologies for analyzing datasets in challenging form. I have addressed problems in clustering of time series and text data. My work has been published in peer-reviewed statistics journals and led to national paper competition awards. In the application side, I have developed forecasting algorithm jointly with colleagues in electrical engineering. With unstructured data, I worked on a building clustering, classification, and sentiment analysis models. In the health sciences, I have worked on mixture modeling, spatial clustering, and forecasting projects on datasets from Electronic Health Records and South Dakota Department of Health.

Applications of Research

Health science, Engineering (Renewable energy)

Professional Memberships

American Statistical Association (ASA), Member, 2012–
Institute of Mathematical Statistics (IMS), Member, 2012–
International Institute for Analytics (IIA), Member, 2013–

Area(s) of Research

[1] Michael, S. and Melnykov, V. (2016) An effective strategy for initializing the EM algorithm in finite mixture models. Advances in Data Analysis and Classification.
doi:10.1007/s11634-016-0264-8
[2] Shakya, A., Michael, S., Saunders, C., Armstrong, D., Pandey, P., Chalise, S., Tonkoski, R. (2016) Solar Irradiance Forecasting in Remote Microgrids using Markov Switching
Model, IEEE Transactions on Sustainable Energy pp. doi:10.1109/TSTE.2016.2629974
[3] Michael, S. and Melnykov, V. (2016) Finite mixture modeling of Gaussian regression time series with application to dendrochronology, accepted by Journal of Classification
[4] Shakya, A., Michael, S., Saunders, C., Armstrong, D., Pandey, P., Chalise, S., Tonkoski, R. (2016) Using Markov Switching Model for solar irradiance forecasting in remote
microgrids, IEEE Energy Conversion Congress and Exposition (ECCE) pp. 1–7 doi:10.1109/ECCE.2016.7855546
[5] Melnykov, V., Michael, S., and Melnykov, I. (2015) Recent Developments in Model-Based Clustering with Applications.In: M. E. Celebi (Ed.), Partitional Clustering Algorithms, ch. 1, pp. 1–39. doi:10.1007/978-3-319-09259-1
[6] Melnykov, V., Melnykov, I. and Michael, S. (2015) Semi-Supervised Model-Based Clustering with Positive and Negative Constraint. Advances in Data Analysis and classification, 10, 327–349. doi:10.1007/s11634-015-0200-3
[7] Michael, S. and Melnykov, V. (2016) Studying complexity of model-based clustering. Communications in Statistics - Simulation and Computation, 45, 2051–2069. doi:10.1080/03610918.2014.889156

Academic Responsibilities

Fall 2018: STAT 684 & 685: Statistical Inference I & II
Fall 2017: STAT 784& 785: Statistical Inference I & II
Fall 2015-16: STAT 701: Modern Applied Statistics I
Spring 2017: STAT 702: Modern Applied Statistics II
Fall 2015- Spring 2017: Independent studies on Natural language processing, Finite mixture modeling and model-based clustering, advanced computational analysis

Work Experience

Assistant Professor at SDSU since 2015

Former Positions Held

Graduate teaching assistantship at UA

Grants

[1] Co-PI “MRI: Acquisition of a Microgrid Cyber-Physical Testbed for Advanced Energy Management Systems," National Science Foundation, $360,516 (Sept, 2017 -Aug, 2020)
[2] PI "E-commerce analytics - finite mixture modeling for applications in E-commerce," Arnold K. Skeie - foundation, $158,590 (Dec 2016 - Dec 2019).
[3] PI "Topic Modeling for the Daschle Collection,” College of Arts and Science and SDSU Foundation, South Dakota State University, $8253.21 (May - Aug 2017).
[4] PI “Combining structured and unstructured data for predictive modeling," SDSU faculty excellence grant, $7,000 (Jan 2018 - Jun 2018).
[5] PI "Natural language processing of text in the patient satisfaction survey," Sanford Data Collaborative, $1,000 (Jan 2018 - Jun 2018).
[6] PI "Breast cancer screening disparities in South Dakota," Women and giving, SDSU Foundation, $1,000 (Jan 2018 - May 2018).
[7] CO-PI "Patient Engagement in the Management of Multiple Chronic Conditions," Sponsored by Sanford Health, Regional, $1,000.00. (Dec 2016 – Jun 2017).

Awards & Honors

National
 Certificate of appreciation (advising Damon Bayer and Eric Stratman), Van D. and Barabara B. Fishback Honors College, 2017
 ASA Travel award for attending Women in Statistics and Data Science conference, 2016
 R.L. Anderson student poster award Top 6 from 63 posters, 2014
 Laha travel award, 2013
 Annual national SAS Analytics and Data Mining Shootout competition Winner, 2013.
Local
 Boyd Harshbarger travel fund, SRCOS 2013 and 2014
 Outstanding Ph.D. Student in Applied Statistics, ISM department at UA, 2014
 Excellence in research and teaching, ISM department at UA, 2013-2015
 Excellence in teaching at COMSAT, 2008 and 2009
 University of Asmara Scholarship, 2001–2005

Research/Scholarship Responsibilities

Reviewer: Computational Statistics and Data Analysis, Journal of Applied Statistics, Journal of Computation and Simulation, Computational Economics, Law Probability and Risk
Session Chair: Topic Contributed Session of Joint Statistical Meeting (2015,2017)
Session organizer and chair: Topic Contributed Session at Joint Statistical Meetings (2016)

Specialty Area

  • Computational statistics, unsupervised learning, clustering, unstructured data anlaysis

Education

Ph.D. University of Alabama (2015), Applied Statistics
MS. University of North Dakota (2011), Mathematics
BS. University of Asmara, Eritrea (2006), Applied Mathematics