1078
The change in the geometrical layout increased the volume fraction of the part , however , due to the avoidance of support , experimental results showed a reduction in fabrication time .
 concept or principle: layout; process parameter: volume fraction; application: support; concept or principle: experimental; concept or principle: reduction; process parameter: fabrication time
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: layout; process parameter: volume fraction; application: support; concept or principle: experimental; concept or principle: reduction; process parameter: fabrication time