Hojae Yi, Ph.D.

Hojae Yi, Ph.D.

  • Assistant Research Professor of Agricultural and Biological Engineering
228 Agricultural Engineering Building
Shortlidge Road

University Park, PA 16802

Areas of Expertise

  • Engineering Mechanics of Materials; Characterization of Physical and Mechanical Properties of Agricultural and Biological Materials
  • Powder Mechanics; Storage, Conveying, Mixing, Size Reduction, Flow, Segregation, and Compaction of Particulate Materials
  • Mathematical/numerical modeling, simulation, and analysis of mechanical behavior of particulate materials and biological materials
  • Applying mechanical engineering theories to the problems involving biological and particulate materials including renewable energy and consumer products

Education

  • 1998-2003 Ph. D. in Agricultural Engineering, Seoul National University, Seoul, S. Korea
  • 1996-1997 M.S. in Engineering. Dept. of Agricultural Engineering, Seoul National University. Suwon, S. Korea
  • 1992-1995 B.A. in Agricultural Engineering, Dept. of Agricultural Engineering, Seoul National University, Suwon, S. Korea
  • October 2018 - Current|
    Assistant Research Professor
    Dept. of Agricultural and Biological Engineering Department, Pennsylvania State University, University Park, PA, U.S.A
  • 2011 – 2018
    Research Associate
    Dept. of Agricultural and Biological Engineering Department, Pennsylvania State University, University Park, PA, U.S.A
  • February 2006 – 2010
    Post Doctorate Scholar
    Dept. of Agricultural and Biological Engineering Department, Pennsylvania State University, University Park, PA, U.S.A.
  • August 2003 – January 2006
    Guest Researcher
    Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
  • December 2001 – October 2003
    Assistant of the Computing Center
    College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
  • September 2000 – August 2001
    Visiting Scholar
    Agricultural and Biological Engineering Department, Pennsylvania State University, University Park, PA, U.S.A.

Publications

MicroCT imaging to determine coordination number and contact area of biomass particles in densified assemblies
Powder Technology, Karamchandani, Apoorva, Yi, Hojae, Puri, Virendra, 2019

Synergistic pectin degradation and guard cell pressurization underlie stomatal pore formation
Plant physiology, Rui, Yue, Chen, Yintong, Yi, Hojae, Purzycki, Taylor, Puri, Virendra M., Anderson, Charles T., 2019

Micromechanical characterization of particle-particle bond in biomass assemblies formed at different applied pressure and temperature
KONA Powder and Particle Journal, Karamchandani, Apoorva, Yi, Hojae, Puri, Virendra, 2019

The stomatal flexoskeleton: how the biomechanics of guard cell walls animate an elastic pressure vessel
JOURNAL OF EXPERIMENTAL BOTANY, Yi, Hojae, Chen, Yintong, Wang, James, Puri, Virendra, Anderson, Charles, 2019

Evaluation of dry steam preconditioning on switchgrass pellet quality metrics
Applied Engineering in Agriculture, Covelli, C. R., Yi, Hojae, Karamchandani, A., Ciolkosz, Daniel Edward, Puri, Virendra, 2018

Single particle mechanical characterization of ground switchgrass in air dry and wet states using a microextensometer
Powder Technology, Karamchandani, Apoorva, Yi, Hojae, Puri, Virendra M., 2016

The mechanical properties of plant cell walls soft material at the subcellular scale
Journal of Materials Science, Zamil, M. Shafayet, Yi, Hojae, Puri, Virendra M., 2015

Fundamental mechanical properties of ground switchgrass for quality assessment of pellets
Powder Technology, Karamchandani, Apoorva, Yi, Hojae, Puri, Virendra, 2015

Farm-Scale biomass pelletizer performance for switchgrass pellet production
Applied Engineering in Agriculture, Ciolkosz, Daniel Edward, Hilton, R., Swackhamer, C., Yi, Hojae, Puri, Virendra, Swomley, D., Roth, Gregory Wayne, 2015

Contributions of the mechanical properties of major structural polysaccharides to the stiffness of a cell wall network model
American journal of botany, Yi, Hojae, Puri, Virendra M., 2014

Mechanical characterization of outer epidermal middle lamella of onion under tensile loading
American Journal of Botany, Zamil, M. Shafayet, Yi, Hojae, Puri, Virendra M., 2014

3-D milk fouling modeling of plate heat exchangers with different surface finishes using computational fluid dynamics codes
Journal of Food Process Engineering, Choi, W., Jun, S., Nguyen, L. T., Rungraeng, N., Yi, Hojae, Balasubramanian, S., Puri, Virendra, Lee, J., 2013

Characterizing microscale biological samples under tensile loading
American journal of botany, Zamil, M. S., Yi, Hojae, Haque, Md Amanul, Puri, Virendra, 2013

Stress gradient within powder en masse during hydrostatic compression
Powder Technology, Yi, Hojae, Puri, Virendra M., 2013

Architecture-based multiscale computational modeling of plant cell wall mechanics to examine the hydrogen-bonding hypothesis of the cell wall network structure model
Plant physiology, Yi, Hojae, Puri, Virendra M., 2012