You can use variables in your view, just like you did, but my guess is
that $data is probably not an array. If you use a variable in a
foreach() loop that is not an array, that is the error you get.
Try doing:
pr($data);
in your controller to see what's inside.
You may also want to enclose your foreach in if statements like this:
<?php if (is_array($recentpapaers)) :?>
<?php foreach ($recentpapers as $paper): ?>
....
<?php endforeach; ?>
<?php else: ?>
<p>No recent papers found.</p>
<?php endif; ?>
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