#  Solver  Description  Requirement  Output 

1  SPOLY  Program SPOLY to analyse the contact network, forces and fabric of the particlepile system as well as particle velocities. 
Particle:
1. Mark (0=big, 1=small) 2. radius of the spheropolyhedra 3. Vertices' coordinate 4. Velocity and force for X, Y, Phi.
Parameters:
1. Normal contact stiffness, k_n: g/cm^2 2. Tangential contact stiffness, k_t: g/cm^2 3. Coefficient of friction, m_u 4. Coefficient of rolling friction, m_ur 5. Normal coefficient of viscosity, gamma_n: 1/s 6. Tangential coefficient of viscosity, gamma_t: 1/s 7. Coefficient of viscosity, gamma_n: 1/s 8. Gravity, g: cm/s^2 9. Angle of inclination of gravity, beta: degrees 10. Verlet distance, alpha: cm 11. Time step, d_t: s 12. Density, rho: g/cm^2 13. viscoelastic Contact Model 

2  CONFEM  Program CONFEM for the solution of water flow and singlespecies chemical contamination (ie solute transport) in soils. 
Element:
1. Type of Boundary condition 2. Thickness 3. Mesh Subdivision & ratio 4. Element type
Analysis:
1. Water flow or solute transport 2. saturated and unsaturated soil 3. 28 variants of the flow equation, reactive diffusionadvection equation and Richards equation. 4. coupled hydrochemical problems 5. steadystate 6. timedependent conditions. 

3  PATRUS  Program PATRUS for the solution of plane truss including loading through nodal forces, self weight, temperature effects and initial lack of fit 
Node:
1. Coordinate X, Y 2. Degree of Freedom X, Y 3. Force X, Y
Element:
1. Two connected nodes I,J 2. Area 3. Young Modulus 4. Temperature 5. Lack of Fit 6. Themal Expansion 7. Weight/unit length 
1. Nodal displacements X, y 2. Member force (TENSION POSITIVE) 3. Nodal forces X, Y 
4  PAISOP  Program PAISOP to solve thin shell problems using mindlin 8node isoparametric elements 
Node:
1. Coordinate X, Y, Z 2. Translational Degree of Freedom X, Y, Z 3. Rotational Degree of Freedom X, Y, Z 4. Force X, Y, Z
Element:
1. Eight connected nodes I,J, K, L, M, N, O, P 2. Thickness 3. Young Modulus 4. Poisson 5. Press X, Y, Z 
1. Nodal displacements and rotations 2. Stress resultants  forces and moments per unit width ELMT, GAUSS POINTS, NXX, NYY, NXY 
5  PAFRAM  Program PAFRAM for the solution of plane frame including loading through nodal forces, udl, temperature effects and initial lack of fit 
Node:
1. Coordinate X, Y 2. Degree of Freedom X, Y, Theta 3. Force X, Y, moment
Element:
1. Two connected nodes I,J 2. Area 3. Inertia 4. Young Modulus 5. Temperature 6. Lack of Fit 7. Themal Expansion 8. Uniformly Distributed Load 9. Hinge at I and/or J (1,0 0,1 OR 1,1) 
1. Nodal displacements X, Y, and rotation 2. Member tension Shear A, B and Force A, B 
6  MAISOP  Program MAISOP solve plane elasticity problem through either plane stress or plane strain problems 
Node:
1. Coordinate X, Y 2. Degree of Freedom X, Y
Element:
1. Multiple connected nodes depending element types 2. Poisson 3. Elasticity Modulus 4. Loading X, Y 5. Thickness 6. Element Type 7. Force X, Y at element edge 
1. Nodal displacements X, y 2. Member force (TENSION POSITIVE) 3. Nodal forces X, Y 
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Free moving particle
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