CLEVELAND—Antonio Campbell scored 21 points, Kenny Kaminski made five 3-pointers and Ohio rolled into the Mid-American Conference tournament semifinals with a 79-62 win over Northern Illinois on Thursday night.The second-seeded Bobcats (21-10) opened the second half with a 14-6 run and eventually built their lead to 24 points over the Huskies (21-12), who had trouble stopping Campbell, the MAC’s player of the year.Ohio, which made 14 3-pointers, will face the Buffalo-Miami winner in Friday’s semifinals.Kaminski dropped three of Ohio’s eight 3-pointers in the first half, helping the Bobcats take a 36-27 lead at intermission.Kaminski had 17 points and Jaaron Simmons, a transfer from Houston, added 16 with 11 assists for Ohio, which went just 10-20 last season in coach Saul Phillips’ first year at the school.Marshawn Wilson paced NIU with 22 points.