History of Portsmouth city to new developments such as Paulsgrove and Leigh Park. On 4 July 1968, an estimated 250,000 people witnessed the return of Alec Rose, a greengrocer in Osborne Road, after he completed his single-handed circumnavigation in "Lively Lady"; he was immediately knighted and made a Freeman of the city. 400 motor-boats, yachts, catamarans and canoes welcomed him into harbour. The University of Portsmouth gained university status in 1992 In 2003 erection was started of a 552 feet high Spinnaker Tower sited at Portsmouth Harbour, and celebrating the city's maritime tradition. Completed in 2005, the tower has twin concrete legs meeting
Effective frequency Effective frequency In advertising, the effective frequency is the number of times a person must be exposed to an advertising message before a response is made and before exposure is considered wasteful. The subject on effective frequency is quite controversial. Many people have their own definition on what this word means. There are also numerous studies with their own theories or models as to what the correct number is for effective frequency. There are several definitions of effective frequency. The following are some key examples: In 1879–80, Hermann Ebbinghaus conducted research on higher mental processes; he replicated the entire procedure