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Recently , a significant increase in buckling load and buckling strength have been recorded by using triangular lattice-infills or topology optimized hierarchical microstructures , respectively .
 process characterization: buckling load; machanical property: buckling strength; concept or principle: topology; material: microstructures
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:
 process characterization: buckling load; machanical property: buckling strength; concept or principle: topology; material: microstructures