We present results from Fermilab MPS experiment E580 on the reactions π⁻N->V°X where V° is K°_S, A or A̅ and X are charged particles. Transverse and longitudinal momentum distributions for the V° and for K*^±(892), Σ^±(1385), Ξ⁻(1321) and Ξ⁺(1321) are presented. A comparison is made with the prediction of QCD quark counting rules. Evidence for A⁺_C; is presented. / Ph. D.

This study concerns the active damping of structural vibrations through the application of various forms of velocity feedback control. Active damping will be required for large space structures which are performance-sensitive to motion or inaccurate pointing. Several control forms, including modal-space active damping and direct rate feedback, are analyzed theoretically, and three laboratory models are described. A previous, unsuccessful attempt at control is reviewed and explained. The remaining control forms developed in the theoretical section were implemented successfully and the results compare favorably with theoretical predictions. Each control form is analyzed relative to its own merits and in comparison with other methods. An important point is the stability assured by a dual (colocated) configuration. of velocity sensors and control force actuators. Modal-space active damping is shown to be an effective control method with predictable performance in controlled modes and beneficial spillover into residual (non-controlled) modes. / Ph. D. / incomplete_metadata

The objective of the present study was to investigate the use of a video game task in comparison to _a pursuit tracking task for the purpose of· detecting alcohol impairment. To carry out this objective, the two tasks used in this study were compared for difficulty in Phase I. The conclusions from Phase I are: 1) that subjects selected higher RPM's to represent a higher level of difficulty, and 2) that the higher RPM's selected resulted in decreased performance compared to lower RPM's. Performance on the two tasks under various levels of BAC was then measured in Phase II. The general conclusions from Phase II are: 1) that performance of both tasks was significantly affected by BAC and Difficulty, and 2) that a greater decrement in performance due to BAC was observed for the video game task than for the pursuit tacking task. The results and implications of the two phases of research will be discussed further in the following two subsections. / Master of Science

This thesis develops a general strategy for factorial linear model analysis for experimental and observational studies. It satisfactorily deals with a number of issues that have previously caused problems in such analyses. The strategy developed here is an iterative, four-stage, model comparison procedure as described in Brien (1989); it is a generalization of the approach of Nelder (1965a,b). The approach is applicable to studies characterized as being structure-balanced, multitiered and based on Tjur structures unless the structure involves variation factors when it must be a regular Tjur structure. It covers a wide range of experiments including multiple-error, change-over, two-phase, superimposed and unbalanced experiments. Examples illustrating this are presented. Inference from the approach is based on linear expectation and variation models and employs an analysis of variance. The sources included in the analysis of variance table is based on the division of the factors, on the basis of the randomization employed in the study, into sets called tiers. The factors are also subdivided into expectation factors and variation factors. From this subdivision models appropriate to the study can be formulated and the expected mean squares based on these models obtained. The terms in the expectation model may be nonorthogonal and the terms in the variation model may exhibit a certain kind of nonorthogonal variation structure. Rules are derived for obtaining the sums of squares, degrees of freedom and expected mean squares for the class of studies covered. The models used in the approach make it clear that the expected mean squares depend on the subdivision into expectation and variation factors. The approach clarifes the appropriate mean square comparisons for model selection. The analysis of variance table produced with the approach has the advantage that it will reflect all the relevant physical features of the study. A consequence of this is that studies, in which the randomization is such that their confounding patterns differ, will have different analysis of variance tables. / Thesis (Ph.D.)--Department of Plant Science, 1992.

Doctorat en sciences psychologiques / info:eu-repo/semantics/nonPublished

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Call number: LD2668 .T4 1938 G51

Call number: LD2668 .T4 1963 F55 / Master of Science

Call number: LD2668 .T4 1978 B69 / Master of Science

Call number: LD2668 .T4 1978 L38 / Master of Science