Education 

BS Physics/Chemistry : Purdue University, May, 1973 

MS Physics : University of Wisconsin , August,
1975 

PhD Physics : University of Wisconsin,
August, 1979 

Thesis advisor was Professor
L.W. Bruch. 

Thesis : Calculation of Local
Fields in Cubic Lattices of Polarizable Atoms

Employment History 

August 1983June 2019 : Instructor
at Madison Area Technical College


September 1981August 1983 :
Lead Project Engineer at RayOVac Corporation's R&D Center.


August 1979August 1981 : postdoctoral
Research Associate for the Department of Physics and Astronomy at the
University of North Carolina at Chapel Hill.


September 1973August 1979 :
Graduate student working on Masters and PhD degrees. Was a teaching assistant

Professional Memberships 

American Physical Society  
The Mathematical Association
of America 

American
Mathematical Association of TwoYear Colleges 
Publications 

1. 
"A Court of Inquiry", Al Lehnen, MathAMATYC Educator
13, Number 3, 52 (2022). 
2. 
"The Name's Not Familiar, But the Equation Rings
a Bell", Al Lehnen, MathAMATYC Educator 13, Number 2, 48 (2022). 
3. 
"The Sphere Game", A.P. Lehnen, G. E. Wessenberg, The AMATYC Review 25, 25 (2003). 
4. 
"Finite
length effects in a lattice gas treatment of an ionic crystal having Frenkel
or Schottky disorder", A.P. Lehnen, J.R. MacDonald, Crystal Lattice
Defects 9,149 (1982). 
5. 
"The applicability
and power of complex nonlinear least squares for the analysis of impedance
and admittance data", J.R. MacDonald, J. Schoonman, A.P. Lehnen, J.
Electroanal. Chem. 131, 77 (1982). 
6. 
"Mean field effects in a lattice gas model of ionic space charge", J.R. MacDonald, A.P. Lehnen, D.R. Franceschetti, J. Phys. Chem. Solids 43, 39 (1982). 
7. 
"Analysis of hydrogen doped lithium
nitride admittance data", J.R. MacDonald, A. Hooper, A.P. Lehnen, Solid
State Ionics 6, 65 (1982). 
8. 
"Interacting lattice gas approach
to space charge distributions", J.R. MacDonald, D.R. Franceschetti, A.P.
Lehnen, Solid State Ionics 5, 105 (1981). 
9. 
"Three dimensional perspective
plotting and fitting of immittance data", J.R. MacDonald, J. Schoonman,
A.P. Lehnen, Solid State Ionics 5, 137 (1981). 
10. 
"Interfacial space charge and
capacitance in ionic crystals", J.R. MacDonald, D.R. Franceschetti, A.P.
Lehnen, J. Chem. Phys. 73, 5272 (1980). 
11. 
"Response of a semiinfinte cubic
lattice to a static point charge", A.P. Lehnen, L.W. Bruch, Phys. Rev.
B 21, 3193 (1980). 
12. 
"Response of a semiinfinte cubic
lattice to uniform electric fields", A.P. Lehnen, L.W. Bruch, Physica
100A, 215 (1980). 
13. 
"Statistical model calculations
of atomic polarizabilities", L.W. Bruch, A.P. Lehnen, J. Chem. Phys.
64, 2065 (1976). 
Personal Information 

I am married to Gwen Ruth Treleven and we have a beautiful daughter, Natalie. I also have three other wonderful children, Brian, Becca and Sarah. Life would be so empty without the meaning your children give it 