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Since there is no surrounding powder to help stabilise the heat transfer , the directed energy deposition process will have differing cooling profiles dependent on the mass of surrounding material at the energy delivery point .
 material: powder; concept or principle: heat transfer; manufacturing process: directed energy deposition process; manufacturing process: cooling; material: material
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:
 material: powder; concept or principle: heat transfer; manufacturing process: directed energy deposition process; manufacturing process: cooling; material: material