The tenth-placed Dragons brought the curtain down on 2014 with victory over Cardiff Blues, but suffered their first defeat in four GUINNESS PRO12 matches with a home defeat to the same opponents on New Year's Day.
Table-toppers Ospreys play host to their south Wales rivals on Sunday and South Africa lock Landman has tipped his side to restart their good form and begin their ascent up the table.
"We are only five points back on the Blues and we just need to keep working hard going into Sunday, the Ospreys are top of the log but we are up for the challenge," Landman told the South Wales Argus.
"We have improved loads since the start of the season, so we are positive even though we didn't get the win against the Blues.
"It's starting to turn for us, you can see that in the way that we are playing.
"A lot of new guys came in this season and it was always going to be difficult to gel, but we have got the balance right recently and the vibe has picked up."
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