id	keyword
american_scientific_journal-2857	vcsel
american_scientific_journal-2857	current
american_scientific_journal-2857	density
american_scientific_journal-2857	technology
american_scientific_journal-2857	injection
american_scientific_journal-2857	engineering
american_scientific_journal-2857	research
american_scientific_journal-2857	frequency
american_scientific_journal-2857	time