A new method of interferometry, based upon holographic photography, is described. The interferometer uses a common optical path in which beam separation is achieved by two exposures separated in time. Its significant advantages are (1) accurate alignment and precision optical elements are not required, (2) differential interferometry, used to measure small changes in either optical path or position of complex subjects, is easily performed, (3) a complete three-dimensional record of the interference phenomena is obtained, permitting post-exposure focusing and examination from various directions, and (4) the technique is well-suited to the recording of transient as well as stationary phenomena. Experimental examples of its use with aerodynamic phenomena are given.
On 23 September 1993 the International Olympic Committee announced that Sydney would host the 2000 Olympic Games. Given the keen competition between rival cities bidding for the Olympics it could be argued that the winning city anticipates economic benefits to accrue from hosting the games. To the extent that this is valid, some stock market reaction may be found to the Olympic announcement. Testing the hypothesis for Australia the following results are found. First no overall impact on the stock market is found. Second, only a limited number of industries portfolios show a significant positive impact to the Olympic games announcement. Specifically the industry portfolios are: building materials, developers and contracts, engineering and miscellaneous services. This is consistent with the economic boost for the Olympics being in infrastructure and development and thus in the general building and construction sector. Third the results clearly demonstrate that for the industries where there was a significant positive stock market reaction to the Olympic Games announcement, that significant positive stock market reaction is confined to stocks based in the state which will host the games, New South Wales.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.