Brazil tourists in 2005. In 2005, Rio de Janeiro, Foz do Iguaçu, São Paulo, Florianópolis and Salvador were the most visited cities by international tourists for leisure trips. The most popular destinations for business trips were São Paulo, Rio de Janeiro and Porto Alegre. In 2006 Rio de Janeiro and Fortaleza were the most popular destinations for business trips. Technological research in Brazil is largely carried out in public universities and research institutes, with the majority of funding for basic research coming from various government agencies. Brazil's most esteemed technological hubs are the Oswaldo Cruz Institute, the Butantan Institute, the Air
American Concrete Institute for the design and construction of structural concrete buildings. It is issued and maintained by the American Concrete Institute. The latest edition of the code is ACI 318-14. Concrete International is a monthly magazine published by the American Concrete Institute. Searchable abstracts of articles are available via the magazine's web page. The Wason Medal for Most Meritorious Paper has been awarded each year since 1917 to the author or authors of a paper published by ACI. Notable recipients include: American Concrete Institute The American Concrete Institute (ACI, formerly National Association of Cement Users or NACU) is a non-profit technical society