Research for Computer Models

This research memorandum is a user's guide for the six-degree-of-freedom flight path generator, Model of Flying Objects (MOFO). Described in detail are the procedures for setting up, running, and modifying the model's underlying software, as well as input data requirements and the output that the model provides. A functional description of each program module is included, and listings of the FORTRAN source code and an automated modification routine appear as appendixes.

The eight-county Allegheny Region of Pennsylvania is 84% forested and comprises one of the state's most valuable timbersheds. Much of this area is inaccessible to conventional logging equipment due to steep slopes, poor drainage, and high erodability. For this reason, there has been a recently growing interest in using cable yarders to harvest these areas. A computer simulation model has been developed to aid in investigating the feasibility of cable logging in this region. This paper explains the design of the model, discusses the field data collected, evaluates the model, and makes recommendations for further data acquisition and model refinement.

This Research Memorandum presents technical appendixes to supplement the Total Force Enlistment Programs Simulation. It is divided into four sections. Appendix A contains a guide to assist users of the simulation methodology. In addition to a detailed example of the use of the simulation, it discusses some of the potential uses not explored in Volume I. Appendix B is a description of the methods used in computing the active-duty inventories and continuation behavior. It also lists some of the important active-duty data elements used in the simulation, as well as the major computer programs used to generate these data. Appendix C presents similar descriptions for the SELRES data. A flowchart of the simulation methodology and annotated versions of the simulation programs appear in Appendix D.

A joint specialist is an Officer who has attended a joint professional military education school such as the Armed Forces Staff College followed by a joint-duty assignment. This research memorandum describes the Joint Specialist Community Model designed to provide Navy policymakers and planners with information for managing joint billets and the joint specialist community in ranks O-4 through O-6. The model uses variables such as the average billet length and promotion rates to determine both the size of the joint specialist community and the number of O-6s able to meet the joint service requirement for promotion to ranks O-7 and above (i.e., flag). The model has been installed on a Lotus 1-2-3 spreadsheet to facilitate its use in studying policy options.