Subjects: ELASTIC waves; ELASTIC scattering; DISCRETE element method
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Subjects: OUTREACH programs; ENVIRONMENTAL protection; RECREATIONLOS Angeles (Calif.)
Subjects: CORRECTIVE orthodontics; QUALITY of life; WILCOXON signed-rank test
Subjects: CARDIAC magnetic resonance imaging; HEART failure; DILATED cardiomyopathy
Subjects: GREEN infrastructure; INTERAGENCY coordination; LANDFILLSLOS Angeles (Calif.)
Subjects: *RECREATION programs; *OUTDOOR recreation; *PARKS
Subjects: *PARKS; *COVID-19 pandemic; *POOR communitiesCALIFORNIA