Reuters: Arise Technologies Corp shares sank 24 percent on Wednesday after the solar energy company said it might pull back spending and freeze expansion projects as global economic woes squeeze demand and sales. The Canadian company said after markets closed on Tuesday that it now expects fourth-quarter revenue of C$18.5 million ($15 million) to C$19.5 million ($15.9 million), down from its previous forecast of C$21 million to C$24 million. It also expects to take a C$2.8 million …