README.Rmd

---
title: "Longitudinal Shoe Study"
output: github_document
---

## Study Description

A longitudinal study of 160 shoes. Shoes were Nike Winflo 4 or Adidas Seeley, and were worn for approximately 6 months, with data collected initially and during 4 check-in periods. 

### Collection Method Documentation

#### Initial Longitudinal Study

The [baseline collection procedures](Collection_Procedures/Documentation/Methods-Techniques-Shoe.pdf) were used in the collection of initial data about the unworn shoes and the study participants as well as during the study. The baseline procedure documents the collection procedures; a separate document describes [changes made to these procedures during the study](Collection_Procedures/Documentation/Procedure.pdf) to improve image quality and reduce equipment malfunctions. 

In addition, single-procedure files are provided for each collection method:

- [Tekscan Mat Scanner](Collection_Procedures/Documentation/Tekscan_Mat_Scanner.pdf)
- [2d Digital Scanner (EverOS Everspry)](Collection_Procedures/Documentation/2d_Digital_Scanner_Everos.pdf)
- [Digital Camera](Collection_Procedures/Documentation/Digital_Camera.pdf)
- [Film/Powder Prints](Collection_Procedures/Documentation/Film_Powder_Print.pdf) (Creation of prints using adhesive film and fingerprint powder)
- [Paper Print/Vinyl Prints](Collection_Procedures/Documentation/Paper_Vinyl_Print.pdf) (Creation of prints using fingerprint powder and paper or vinyl planks)
- [Scanner Procedure - paper and film prints](Collection_Procedures/Documentation/Scanning_Film_Paper_Prints.pdf)
- [Photography Procedure - Vinyl prints](Collection_Procedures/Documentation/Vinyl_Photos.pdf)
- [3d Digital Scanner (Stationary)](Collection_Procedures/Documentation/3dScanner_Turntable.pdf) - for the EinScan Pro+ 3D Scanner with a turntable
- [3d Digital Scanner (Handheld)](Collection_Procedures/Documentation/3dScanner_Handheld.pdf)

#### Realistic Prints Expansion

At the conclusion of the longitudinal study, we decided to create prints similar to those which may be found at a crime scene with some of the worn shoes. 

- [Dental Stone Casting](Collection_Procedures/Documentation/Casting-Procedure.pdf)
- [Shoe Impressions in Dust](Collection_Procedures/Documentation/Shoe-Impressions-in-Dust-Photography-and-Lifting-Procedure.pdf)