Table 1. Classification of existing studies

주요요인	대표 저자
UAM 기술	Straubinger et al.(2020), Shaheen et al. (2018), Winter et al.(2020), AL Haddad et al.(2020)
보안 문제	AL Haddad et al.(2020), NASA(2018), Shaheen et al.(2018)
신뢰	Shaheen et al.(2018), Uber(2016), AL Haddad et al.(2020), Winter et al.(2020)
가격	Fu et al.(2019), AL Haddad et al.(2020), NASA(2018)
인프라	Straubinger et al.(2020), AL Haddad et al.(2020),
소음	NASA(2018), AL Haddad et al.(2020), Edwards and Price(2020), Patrick(2019)