Journal Articles
Bobko, C., Gathier, B., Borges, L., Ulm, F.-J. (2008) “The nanogranular origin of friction and cohesion in shale - a strength homogenization approach to interpretation of nanoindentation results.” (under revision)
Ortega, J.A., Bobko, C., & Ulm, F.-J. “Does Particle Shape Matter? Percolation thresholds and elasticity scaling relationships for transversely isotropic ellipsoidal particles” (in preparation, abstract accepted for Geotechnique - special issue on Soil Mechanics at the Grain Scale, to be published in 2010)
Miller, M., Bobko, C., Vandamme, M., and Ulm, F.-J. (2008) “Surface Roughness Criteria for Cement Paste Nanoindentation.” Cement and Concrete Research 38 (4): 467-476.
Bobko, C., and Ulm, F.-J., (2008) “The Nano-Mechanical Morphology of Shale.” Mechanics of Materials 40: 318-337.
Ulm, F.-J., Vandamme, M., Bobko, C., Ortega, J.A., Tai, K. and Ortiz, C. (2007) “Statistical Indentation Techniques for Hydrated Nanocomposites: Concrete, Bone, and Shale.” Journal of the American Ceramic Society. 90 (9) 2677-2692.
Bobko P., Roth, P., & Bobko, C. (2001) “Correcting the effect size of d for range restriction and unreliability.” Organizational Research Methods. 4 (1) 46-61.
Conference Proceedings
Tran, M., Abousleiman, Y., Hoang, S., Ortega, J.A., Bobko, C., and Ulm, F.-J. (2007) “The Acoustic Signature of Woodford Shale and Upscale Relationship from Nano-Scale Mechanical Properties and Mineralogy.” Eos Trans. AGU, 88 (52), Fall Meet. Suppl. Abstract T33C-1508. AGU Fall Meeting, San Francisco, CA, 10-14 December 2007.
Abousleiman, Y., Tran, M., Hoang, S., Bobko, C., Ortega, J.A., and Ulm, F.-J. (2007) “Geomechanics Field and Lab Characterization of Woodford Shale: The Next Gas Play.” Proceedings from ATCE 2007: SPE Annual Technical Conference and Exhibition, Anaheim, CA, 11- 14 November 2007.
Ulm, F.-J., Vandamme, M., Bobko, C., Ortega, J. A. (2007) “The Nanogranular Nature of Hydrated Nanocomposites: Concrete, Clay and Bone.” In M. Jirasek, Z. Bittnar, and H. Mang (Eds.), Proceedings from MHM 2007: Modeling of Heterogeneous Materials with Applications in Construction and Biomedical Engineering, Prague, Czech Republic, 25-27 June 2007, 20-22.