input: Write a function to load input data, perform calibration, calculate various values, and generate plots based on instructions provided in a separate text file. The generated plots show absorbed power vs emitted power, absorbed power vs reflectivity, and dissipated power vs wavelength. The script should also calculate thermal resistance and display it on the plot. The function should run by executing the main function.
  assert main()==None
  assert main('your_input_file.csv', 'your_calibration_folder')==None
  assert main('another_input_file.csv', 'another_calibration_folder')==None
output: def main(input_file=None, calibration_folder=None):
      # Load input data
      if input_file is None:
          input_file = 'default_input_file.csv'
      if calibration_folder is None:
          calibration_folder = 'default_calibration_folder'
      
      # Perform calibration
      # Placeholder for calibration logic
      
      # Calculate various values
      # Placeholder for calculation logic
      
      # Generate plots
      # Placeholder for plotting logic
      
      # Calculate thermal resistance
      # Placeholder for thermal resistance calculation
      
      # Display thermal resistance on the plot
      # Placeholder for displaying thermal resistance
      
      return None