1. Friedel, M.J., and R.E. Thill. 1990, U.S. Bureau of Mines research on the Kaiser Effect for determining stress in rock. Proceedings in International Joint Meeting, 1st Workshop on AE in Civil Engineering and 2nd Workshop on AE and Rock Fracture Mechanics, Kumamoto City, Japan, Oct. 29-31, pp. 54.
2. Schmidt, R.D., M.J. Friedel and K. Behnke, 1990, Hydrologic considerations of underground in-place copper leaching. Society for Mining, Metallurgy, and Exploration Annual Meeting, Preprint 90-179, Salt Lake City, UT, February 26-March 1, 12 pp.
3. Jessop, J.A., R.E. Thill, and M.J. Friedel, 1990, Acoustic site characterization studies for in situ mining. Society for Mining, Metallurgy, and Exploration Annual Meeting, Preprint 90-184, Salt Lake City, UT, February 26-30, 11 pp.
4. Friedel, M.J. and Hanson, J.C., 1990, An integrated geophysical approach to detection of abandoned mine openings. Proceedings 12th Annual National Abandoned Mine Land Conference, Breckenridge, CO, September 15, pp. 57-86.
5. Friedel, M.J. and J.C. Hanson, 1990, Assessment of ground penetrating radar for detecting hazardous abandoned mine openings and related features. Proceedings12th Annual National Abandoned Mine Land Conference, Breckenridge, CO, September, pp. 87.
6. Thill, R.E., M.J. Friedel, and J.C. Hanson, 1990, Mining geophysics: a research perspective. Proceedings International Symposium on Borehole Geophysics for Petroleum, Hydrology, Mineral Engineering Applications, Tucson, AZ, February 1-3, 5 pp.
7. Schmidt, R.D. and M.J. Friedel. 1991, Application of computers for analysis of in situ leach mining hydrology, Proceedings Indo-U.S. Symposium on Computers in the Mining Industry, Dahnbad, India, November 11-13, pp. 121-135.
8. Friedel, M.J. and R.D. Schmidt, 1991, Effect of an unsaturated setting on the hydrology of in situ copper leaching. Society for Mining, Metallurgy, and Exploration Annual Meeting, Preprint 91-161, Denver, CO, February 25-28, 11 pp.
9. Hanson, J.C., Tweeton, D.R., Friedel, M.J., and Dahl, L.J., 1991, A field test of electromagnetic methods for the detection of conductive plumes. Annual International Meeting: Society of Exploration Geophysics, November 10-14, pp. 569-572.
10. Friedel, M.J., J.A. Jessop, and R.E. Thill, 1991, Igneous rock mass fracture delineation using common offset radar reflection. Annual International Meeting, Society of Exploration Geophysics, November 10-14, pp. 504-506.
11. Friedel, M.J., P.M. Jones, and R.D. Schmidt, 1992, Geostatistical analysis of dynamic transmissivity during in situ copper leaching. Proceedings 23rd Int. Symp. App. Comp. Min. Ind., April 7-11, pp. 49-61.
12. Jessop, J.A., M.J. Friedel, D.R. Tweeton, and M.J. Jackson, 1992. Fracture detection with seismic crosshole tomography for solution control in a stope. Proceedings Symposium on Application of Geophysics to Engineering and Environmental Problems, Oakbrook, IL, April 26-29, pp. 487-587.
13. Jackson, M.J., D.R. Tweeton, and M.J. Friedel, 1992, Approaches for optimizing the use of available information in crosshole seismic tomographic reconstruction. Proceedings GeoTech '92 Geocomp. Conference, Denver, CO, August 31-September 3, pp. 130-143.
14. Schmidt, R.D., D. Early, III, and M.J. Friedel, 1992, Analysis and implications of dynamic transmissivity conditions during in situ copper leaching. Proceedings Engineering Foundation Conference, In Situ Recovery of Minerals II, Santa Barbara, October 25-30, pp. 259-286.
15. Jessop, J.A., D.L. Borek, M.J. Jackson, D.R. Tweeton and M.J. Friedel, 1992, Evaluation of a stope leaching site using geotomography. Proceedings Engineering Foundation Conference, In Situ Minerals Recovery-II, Santa Barbara, CA, October 25-30, pp. 599-616.
16. Tweeton, D.R., J.C. Hanson, M.J. Friedel and L.J. Dahl, 1992, Field tests of geophysical methods for monitoring the flow patterns of leach solution. Proceedings Engineering Foundation Conference, In Situ Recovery of Minerals II, October 25-30, Santa Barbara, CA, pp. 179-199.
17. Thill, R.E., M.J. Friedel, J.A. Jessop, and M.J. Jackson, 1992, Integrated geophysics and geotomography for ground control applications. Proceedings 4th Ground Control Symposium, Southern Illinois University, Mt.Vernon, IL, November 2-4, pp. 51-69.
18. Friedel, M.J., J.A. Jessop, and R.E. Thill, 1992, Mining applications of seismic tomography. Annual International Meeting: Society of Exploration Geophysics Annual Meeting, November 10-14, pp. 58-62.
19. Friedel, M.J. and M.J. Jackson, 1993, Application of seismic tomography for assessing yield pillar stress conditions. Proceedings of 12th Conference on Ground Control in Mining, Lakeview Resort and Conference Center, Morgantown, WV, August 3-5, pp. 292-301.
20. Hauser, K.L. and M.J. Friedel, 1993, Geophysical techniques applied to cavity detection at the Wharf Mine, Lead, South Dakota. Proceedings 4th Tunnel Detection Symposium, Golden, CO., September 20-24, pp. 617-636.
21. Jackson, M., E. Wedepohl, M.J. Friedel, and K. Hauser, 1993, Forward modeling of electromagnetic wave propagation in layered media: implications for cross-borehole radio-wave detection of voids in coal measure rocks. Proceedings 4th Tunnel Detection Symposium, Golden CO, September 20-24, pp. 399-412.
22. Friedel, M.J., and E. Wedepohl, 1994, Case studies of radio wave tomography at base metal and gold ore bodies in the USA and Southern Africa. Society of Mining Metallurgy, & Exploration Annual Meeting, Preprint 94-143, Albuquerque, NM, 1994, March 27-31, pp. 32-44.
23. Friedel, M.J., M.J. Jackson, E. Williams, M.S. Olson, 1994, Tomographic imaging of coal pillar conditions: observations and implications. Society for Mining, Metallurgy, and Exploration Annual Meeting, February 14-17, Albuquerque, NM, Preprint 94-110, 17 p.
24. Moyle, P.R., J.M. Fay, and M.J. Friedel, 1994, Integrated geophysical characterization of mine-waste sites in the Coeur d’ Alene Mining District, ID. Proceedings Symposium on Application of Geophysics to Engineering and Environmental Problems, March 27-31, pp. 857-868.
25. Friedel, M.J., D.F. Scott, M.J. Jackson,,T. Williams, and S.M. Killen, 1995, 3-D Seismic tomographic investigation of mechanical conditions in a deep US gold mine, Proceedings Mechanics of Jointed and Faulted Rock - 2, Vienna Austria, April 13-17, pp. 689-695.
26. Jackson, M.J., M.J. Friedel, D.R. Tweeton, D.F. Scott, and T.J. Williams, 1995, Three-dimensional imaging of underground mine structures using geophysical tomography, with tests for resolution and robustness. Proceedings of 3rd Canadian Conference on Computer Applications in the Mineral Industry, Montreal, Quebec, Canada, October 22-25, pp. 23-32.
27. Jackson, M.J., M.J. Friedel, D.R. Tweeton, D.F. Scott, and T.J. Williams, 1995, Imaging underground mine structures using seismic tomography. Proceedings Symposium on Application of Geophysics to Engineering and Environmental Problems, March, 1995, pp. 112-127.
28. Williams, T. J., Scott, D. F. and Friedel, M. J., 1996, Application of seismic tomography to underground mining: Part 2, 66th Annual International Meeting: Society of Exploration Geophysics, Denver, CO, Nov. 1, pp. 2057-2059.
29. Scott, D.F, T.J. Williams, and M.J. Friedel, 1996, Application of seismic tomography to underground mining: part 1, Workshop: Annual International Meeting: Society of Exploration Geophysics Annual Meeting, Denver, CO, Nov. 15, pp. 2053-2056.
30. Scott, D.F, T.J. Williams and M.J. Friedel, 1996, Application of seismic tomography in underground mining, Proceedings 15th International Conference on Ground Control in Underground Mining, Golden, CO: Colorado School of Mines, Aug. 13-15, pp. 6547-659.
31. Friedel, M.J., Scott, D.F., and T.J. Williams, 1997, Investigation of a rock-burst site, Sunshine Mine, Kellogg, Idaho. Proceedings Of the 4th International Symposium on Rockbursts and Seismicity in Mines, Gibowicz and Lasocki (eds), Balkema, Krakow, Poland, August 11-14, pp. 311-314.
32. Nieber, J.L., M.J. Friedel, and B.S. Sharratt, 1997, Modeling equations for two-dimensional coupled heat, fluid, and solute transport in variably-saturated, variably-frozen soils, Cold Regions Research Laboratory Special Report 97-10: Proceedings International symposium on physics, chemistry and ecology of seasonally frozen soils, Fairbanks, Alaska, June 10-12, pp. 140-146.
33. Arnold, T., and M.J. Friedel, 1999, Effects of land use on recharge potential of surficial and shallow bedrock aquifers in the Upper Illinois River Basin, U.S. Geological Survey Water-Resources Investigations Report, 00-4027 18 pp.
34. Warner, Kelly L., Terrio, P., King, R., Groschen, G., Arnold, T., Morrow, W.S., Friedel, M.J., and Harris, M.A., 2000, Potential drinking water concerns in ground and surface water in the Illinois River basin; U.S. Geological Survey perspective from the National Water Quality Assessment, Illinois water supplies; is the well running dry? Program and abstracts, p.12-13, 2000. Meeting: Illinois water supplies; is the well running dry?, Chicago, IL, United States, July 18-20, 2000.
35. Arnold, T., M.J. Friedel, and K.L. Warner, 2001, Hydrogeologic inventory of the upper Illinois River Basin – creating a large data base from well construction records. Illinois State Geological Survey Circular SP-1101.
36. Friedel, M., 2002, Quantifying ground-water recharge using a coupled water-heat-solute transport model: nonlinear parameter estimation, nonuniqueness, and predictive uncertainty, Trans. AGU, 83(42), Fall Meet. Suppl., H21D-0860, 2002.
37. Little, J., J.A. Tindall, and M.J. Friedel, 2004, Correlated Moisture Content, Pressure and Temperature Data for Development of Hysteretic Moisture Retention Curves, Trans. AGU, 83(42), Fall Meet. Suppl., H33B-0464, 2004.
38. Little, J., J.A. Tindall, and M.J. Friedel, 2005, Scaling relations between laboratory and field scale hysteretic measurements for a coarse sandy loam soil, Trans. AGU, 83(42), Fall Meet. Suppl., H13-6703, 2005.
39. Figureoa, M., J.A. Tindall, and M.J. Friedel. 2007, Comparison of d18O composition of water extracted from suction lysimeters, centrifugation, and azeotropic distillation, Trans. AGU, 83(42), Fall Meet. Suppl., H13-6703
40. Tindall, J.A., M Figueroa-Johnson, and M.J. Friedel. 2007, Comparison of Soil-Water Sampling Techniques, Trans. AGU, 83(42), Fall Meet. Suppl., H53F-1489. http://www.agu.org/cgi-bin/sessions5
41. Friedel, M., 2008, Joint Inverse Modeling to Estimate Flood-Flow Depths and their Uncertainty in Ungauged Coastal Basins, El Salvador, Central America, Extended abstract, United States Geological Survey, 2nd Modeling Conference, Gulf Shores, Alabama, February, 10-15, 2008 http://geology.usgs.gov/modeling2008/index.htm
42. Friedel, M., 2008, Joint Inverse Modeling to Estimate Extreme Rainfall Events and their Uncertainty in Ungauged Coastal Basins, El Salvador, Central America, Extended abstract, United States Geological Survey, 2nd Modeling Conference, Gulf Shores, Alabama, February, 10-15, 2008 http://geology.usgs.gov/modeling2008/index.htm
43. Friedel, M., 2008, Application of Stochastic Modeling to Forecast Likely Urbanization Effects on Ecological Integrity in the Upper Illinois River Basin, USA, Extended abstract, United States Geological Survey, 2nd Modeling Conference, Gulf Shores, Alabama, February, 10-15, 2008 http://geology.usgs.gov/modeling2008/index.htm
44. Stochastic Modeling to Forecast Likely Effects of a Proposed Reservoir on Colorado River Quantity and Quality near Grand Junction, Colorado, Extended abstract, United States Geological Survey, 2nd Modeling Conference, Gulf Shores, Alabama, February, 10-15, 2008 http://geology.usgs.gov/modeling2008/index.htm
45. Johnson, R.H., and Friedel, M.J., 2008, Factoring Uncertainty into Restoration Modeling of In-Situ Leach Uranium Mines, 330-8, Hydrogeology III - Uranium, Metals, and Other Contaminants in Groundwater, Geological Survey of America, 2008 Joint Annual Meeting, 5-9 Oct. 2008.
http://a-c-s.confex.com/crops/2008am/webprogram/
Paper47488.html
46. Friedel, M.J., Souza, O.F., Yoshinaga, S. P, Silva, A M, 2008, Application of a Joint Inversion Strategy to Improve Electromagnetic Imaging of Hydrogeologic Structures in Northeastern Brazil, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract, NS31A-1224.http://www.agu.org/cgi-bin/sessions5?meeting=fm08&part=NS31A&maxhits=400
47. Friedel, M.J., 2008, Numerical modeling strategies in resource assessments – past, present, and future. SP 41. Modelagem numérica e experimental de processos geológicos, Grande Área: MÉTODOS E TÉCNICAS EM GEOLOGIA, 44º Congresso Brasileiro de Geologia, Curitiba, Brazil, October 26-31.
48. Johnson, R.H., Manning, A.H., and Friedel, M.J., 2009, Evaluating the Utility of Watershed-Scale Numerical Models in the U.S. Geological Survey’s Mineral, Environmental Assessment Project, Toward More Effective Use of Ground Water Modeling II: Improved Conceptual Models and Data Integration 2009 Ground Water Summit: The Science and Engineering Conference, April 21, 2009. http://ngwa.confex.com/ngwa/ 2009gws/webprogram/Paper5816.html
49. Iwashita, F., Friedel, M.J., Carlos de Souza-Filho, 2010, Surveying soil chemical weathering in Parana state/Brazil: A data mining-GIS hybrid approach, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
50. Iwashita, F., Silvana A., Vieira Monteiro, A.M., Friedel, M.J., 2010, Evaluating the effects of positioning errors on the accuracy of species distribution models using synthetic data, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
51. Brown, P. and Friedel, M.J., 2010, Test results comparing the new US Geological Survey Monte Carlo quantitative resource estimation simulation software application to MARK3, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
52. Brown, P. and Friedel, M.J. 2010, Overview of new Monte Carlo software for quantitative mineral resource estimation, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
53. Friedel, M.J., 2010, Forecasting climate change effects on ground water recharge using an unsupervised artificial neural network, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
54. Friedel, M.J., 2010, Intelligent exploration for shallow groundwater in fractured rock systems, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
55. Friedel, M.J., 2010, Intelligent Post-fire Hydrologic and Geomorphic Landscape Modeling, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
56. Friedel, M.J., 2010, Intelligent Post-fire Hydrologic and Geomorphic Landscape Modeling, U.S. Geological Survey, 3rd Modeling Conference, Denver Colorado, June, 2010
57. Moreira, L.P., Sand de França G.,L.A., Friedel, M.J., 2010, Joint inversion of receiver function and surface waves using a regularized Gauss-Marquardt-Levenberg nonlinear method, EOS Trans. AGU, 89(53), 2010 The Meeting of the Americas, Abstract, S12xx-xxxx: 8–13 August, Foz do Iguaçu - PR, 85862–210, Brazil
58. Iwashita, F., Friedel, M.J., Ribeiro, G.F., Fraser, S.J., de Souza-Filho, C.R., 2010, Using self-organizing maps to predict soil texture and hydraulic conductivity in the Poços de Caldas, Modelagem numérica e experimental de processos geológicos, Grande Área: MÉTODOS E TÉCNICAS EM GEOLOGIA, 45º Congresso Brasileiro de Geologia, Belem, Brazil, October 26-31.
