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Its denizens are a mean-spirited bunch , scavenging off others and the ruins of their surroundings . Our machines will navigate employing a dense 3D awareness of their surroundings , be tolerant of route surprises , and be easily placed by ordinary workers in entirely new routes or work areas . This type of research focuses on how humans make sense of their surroundings through symbols , rituals , social structures , or social roles . A leading force in the New York art world , Henri encouraged his students to render their urban environment with candor and bravura , depicting both the grit and the glory of their surroundings .