id	keyword
american_scientific_journal-11432	radiation
american_scientific_journal-11432	data
american_scientific_journal-11432	background
american_scientific_journal-11432	machine
american_scientific_journal-11432	research
american_scientific_journal-11432	journal
american_scientific_journal-11432	technology
american_scientific_journal-11432	engineering
american_scientific_journal-11432	background radiation
american_scientific_journal-11432	sciences
american_scientific_journal-11432	figure