public function saveScienceActivity(JosScienceActivity $josScienceActivity)
 {
     $data = array('name' => $josScienceActivity->getName(), 'year_id' => $josScienceActivity->getYearId());
     $value_id = (int) $josScienceActivity->getValueId();
     if ($value_id == 0) {
         $this->tableGateway->insert($data);
     } else {
         if ($this->getScienceActivityByArrayConditionAndArrayColumn(array('value_id' => $value_id), array('value_id'))) {
             $this->tableGateway->update($data, array('value_id' => $value_id));
         } else {
             return false;
         }
     }
     return true;
 }