MatLab: Making Life Easier in a Frustrating Way Michael Frohbergh, Basak Doyran and Jonathan Gerstenhaber

Background of Research Electrospun Mineralized Chitosan Nanofibers Crosslinked with Genipin for Bone Tissue Engineering Important criteria for Bone Tissue is Mechanical Strength Common Properties to Report include Young’s Modulus and Ultimate Tensile Strength

What the Program Will Do Bypass tedious and repetitive work in Excel Evaluate multiple sets of data simultaneously Calculate values for the user Manipulate data with ease

Original Excel Data Manipulation

Updated MatLab Program

Analyze each different input data set from the text files Select file to be run by program Perform the calculations to obtain the values of stress and strain from the raw data Generate a stress/strain curve Plot longest linear region of the graph Ultimate tensile strength is calculated from the maximum stress at break as a function of the cross sectional area program user Edit values of Run Information and Sample Information Edit the regions of the x- axis Young’s Modulus is calculated from given values

Input Data Text Files Single file with multiple data sets User Interface will allow user to systematically go through each data set, excluding if necessary Input files can be manipulated manually or evaluated based on the settings of the program Output will be exported to Excel for compilation No Web-based data-feed required

Results Successful – Browse function – Run function – Exclude “User Stopped” function – Delete Current Specimen function – Current specimen values function – Graphical Representation – Run Information Panel function – Sample Information Panel function – Plot Linear Region Function – Young’s Modulus/UTS functions – Previous/Next functions

Results In Progress – Smoothen function – User selecting X/Y values function – Export to Excel function – User Editing of Specimen Properties – User Selecting Specific Figure

Most Challenging Tasks Performed Inputting Data Plotting the Linear Region – Hough Transformation – Reassigns Specimen Keeping Variables Consistent and Updated Minor bugs throughout the program due to the length of the code – Positioning of the Data (filtering) – Program does not keep on the Specimen at hand – Getting the Young’s Modulus – Having the data converted from Force/Displacement to Stress/Strain Curve

Who Did What Jonathan – Import function – Plotting function – Linear Plotting Function Mike – Run Info/Sample Info Panel Functions – Young’s Modulus/UTS functions – Manually enter x-axis for user input Basak – Exclusion Functions – Delete/Undo Functions – Current Specimen & Previous/Next Functions

Data Structure