Static and Dynamic Error Correction of a Computer-Aided Mechanical Navigation Linkage for Arthroscopic Hip Surgery

While beneficially decreasing the necessary incision size, arthroscopic hip surgery increases the surgical complexity due to loss of joint visibility. To ease such difficulty, a computer-aided mechanical navigation system was developed to present the location of the surgical tool relative to the patient¿s hip joint. A preliminary study reduced the position error of the tracking linkage with limited static testing trials. In this study, a correction method, including a rotational correction factor and a length correction function, was developed through more in-depth static testing. The developed correction method was then applied to additional static and dynamic testing trials to evaluate its effectiveness. For static testing, the position error decreased from an average of 0.384 inches to 0.153 inches, with an error reduction of 60.5%. Three parameters utilized to quantify error reduction of dynamic testing did not show consistent results. The vertex coordinates achieved 29.4% of error reduction, yet with large variation in the upper vertex. The triangular area error was reduced by 5.37%, however inconsistent among all five dynamic trials. Error of vertex angles increased, indicating a shape torsion using the developed correction method. While the established correction method effectively and consistently reduced position error in static testing, it did not present consistent results in dynamic trials. More dynamic paramters should be explored to quantify error reduction of dynamic testing, and more in-depth dynamic testing methodology should be conducted to further improve the accuracy of the computer-aided nagivation system.

The compleat strategyst, being a primer on the theory of games of strategy;

Mode of access: Internet.

Evaluation of the computation of wave direction with three-gage arrays /

Issued July 1977.

The book of games, or, A history on juvenile sports practised at the Kingston Academy : illustrated with twenty-four copperplates.

Shoemaker

The book of games with directions how to play them,

Mode of access: Internet.

The American Hoyle; or, Gentleman's hand-book of games: containing all the games played in the United States, with rules, descriptions and technicalities, adapted to the American methods of playing.

Mode of access: Internet.

Chess problems, a collection of original positions, forming one hundred ends of games won or drawn; to which is added a selection of games, including those played between the Leeds and Liverpool clubs, with remarks.

Mode of access: Internet.

A new treatise on chess, containing the rudiments of the science, with an analysis of the best methods of playing the different openings and ends of games, including many original positions, and a selection of fifty chess problems never before printed in this country.

Mode of access: Internet.

A selection of games at chess, actually played by Philidor and his contemporaries : now first published from the original manuscripts ; with notes and additions /

In ms. on verso of t.p.: C. Sanson.

The American Hoyle; or, Gentleman's hand-book of games, containing all the games played in the United States, with rules, descriptions, and technicalities adapted to the American method of playing,

Mode of access: Internet.

State Levy of Taxes. Computation and Apportionment

Title Varies: 1898-1905, Statement of the Computation and Apportionment of the State Levy of Taxes; ?-1897, Statement of the Expenses To Which the State of Oregon Will Be Subjected for the Year 18?-1897 and of the Items of Deficiencies More

Introduction to the theory of games.

Bibliography: p. 361-367.

The development of a computer aided system for adaptive budgeting in a confectionery manufacturing firm

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