Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 8 of 8
Full-Text Articles in Entire DC Network
Coulomb States In Atoms And Solids., Darren Mark Ortalano
Coulomb States In Atoms And Solids., Darren Mark Ortalano
LSU Historical Dissertations and Theses
In this dissertation, an empirical quantum defect approach to describe the valence excitons of the rare gas solids is developed. These Coulomb states are of s-symmetry and form a hydrogen-like series which converges to the bottom of the lowest conduction band. A non-zero quantum defect is found for all of the excitons of neon, argon and xenon. For these systems, then, there exists, in addition to the screened Coulombic component, a non-Coulombic component to the total exciton binding energy. The Wannier formalism is, therefore, inappropriate for the excitons of Ne, Ar and Xe. From the sign of the quantum defect, …
Relative Isometric And Dynamic Endurance Curves For Different Muscle Groups Of The Upper Extremities., Seung Ho Yoon
Relative Isometric And Dynamic Endurance Curves For Different Muscle Groups Of The Upper Extremities., Seung Ho Yoon
LSU Historical Dissertations and Theses
This study analyzed the characteristics of both dynamic and isometric relative endurance curves for four different muscle groups of the upper extremities. College males (N = 56) were tested on the Cybex Isokinetic Dynamometer both isometrically and dynamically on four exercises: bench press, arm curls, shoulder internal rotation and wrist flexion. In all, eight separate exercises were examined. Each dynamic and isometric exercise bout was for 80 and 60 s, respectively and data were recorded ever 4 s. Parameters examined were Maximal Strength, Total Force Output, Relative Total (RT, TFO, divided by 80s or 60s x peak force), and Relative …
The Relation Of Teacher Feedback To Student Achievement In Learning Selected Tennis Skills., Tony Eghan
The Relation Of Teacher Feedback To Student Achievement In Learning Selected Tennis Skills., Tony Eghan
LSU Historical Dissertations and Theses
This study assessed the impact of teacher feedback on student achievement in learning three tennis skills (forehand, backhand, and the serve). It also described teacher feedback patterns in teaching beginning tennis. Subjects consisted of a professional tennis instructor and 40 undergraduate male and female students enrolled in two beginning tennis classes. Fifteen 30-min instructional sessions were videotaped and audiotaped within a 10-week period. Subjects were pretested and posttested on the three tennis skills. The tapes were coded for type and frequency of teacher feedback. The mean occurrence of teacher feedback directed to individual students was about 1 (M = 1.4, …
Construction Of A Sport Specific Mental Imagery Assessment Instrument Using Item Response And Classical Test Theory Methodology., John George Tew Jr
Construction Of A Sport Specific Mental Imagery Assessment Instrument Using Item Response And Classical Test Theory Methodology., John George Tew Jr
LSU Historical Dissertations and Theses
Two phases are reported in the development of a sport specific Mental Imagery Assessment Instrument (MIAI). The focus in constructing this instrument was to deal with the problems identified by Hall (1985) and, at the same time, to provide a sport specific MIAI for football players that could be used for future research. In addition, it was hoped that the construction procedures for this particular MIAI could be used as a model to develop sport specific MIAIs for other sports. Thus, a secondary purpose of the study was to provide a comparative approach to test construction in the affective domain …
Application Of The Fast Fourier Transform To Impedance Analysis Of Nitrogen - Titanium-Dioxide And Lanthanum-Trifluoride Electrodes., Kenneth Robert Carney
Application Of The Fast Fourier Transform To Impedance Analysis Of Nitrogen - Titanium-Dioxide And Lanthanum-Trifluoride Electrodes., Kenneth Robert Carney
LSU Historical Dissertations and Theses
A study is presented of the utility of pulse derived waveforms for use in impedance analysis of electrochemical systems. Factors to be considered in optimization of pulse duration and also in the proper implementation of the FFT are discussed. Impedance results are presented for model circuits and for two nonfaradaic electrochemical systems--n-TiO$\sb2$ electrode in aqueous Na$\sb2$SO$\sb4$ and LaF$\sb3$ electrode in aqueous fluoride solution. The techniques developed were applied to model circuits composed of aperiodic elements in order to quantify the decrease in precision with increasing frequency associated with pulse type waveforms. Using 8 bit digital sampling resolution and 512 point …
Intermolecular Interactions And The Theory Of Electron Transfer Between Hexaaquoiron Ions And Hexaammineruthenium Ions In Water., Paul James Magestro
Intermolecular Interactions And The Theory Of Electron Transfer Between Hexaaquoiron Ions And Hexaammineruthenium Ions In Water., Paul James Magestro
LSU Historical Dissertations and Theses
Theoretical studies of the electron transfer rates between hexaaquoiron(II) and (III) ions, and between hexaammineruthenium(II) and (III) ions in aqueous solutions have been undertaken using detailed representations of the interaction potentials and including the flexibility of the ligand geometry. This is done through an intuitive and efficient computational scheme involving tested site-site potentials for water and ammonia. The calculations on the ferrous-ferric electron exchange indicate that fluctuations in the configuration of the hydration shell are important and affect the rate significantly. In the hexaammineruthenium reaction, there is no evidence for any substantial contribution from this factor, although rates tend to …
The Memory Representation Of Motor Skills: A Test Of Schema Theory., Craig John Chamberlin
The Memory Representation Of Motor Skills: A Test Of Schema Theory., Craig John Chamberlin
LSU Historical Dissertations and Theses
Currently, the pre-eminent model of central representation for motor skills is embodied in Schmidt's schema theory of discrete motor skill learning (Schmidt, 1975). Two experiments are reported here that contrast predictions from a schema abstraction model that is the basis for schema theory to those from a specific exemplar model of motor skill memory representation. In both experiments, subjects performed 300 trials per day of 3 variations of a 3-segment timing task over 4 days of acquisition. The subjects then either immediately transferred to 4 novel variations of the same task (Experiment 1) that varied in degree of environmental similarity …
How Forgetting Facilitates Remembering: An Analysis Of The Contextual Interference Effect In Motor Learning., Carol Cosgrove Poto
How Forgetting Facilitates Remembering: An Analysis Of The Contextual Interference Effect In Motor Learning., Carol Cosgrove Poto
LSU Historical Dissertations and Theses
The experiments reported here were designed to test a hypothesis regarding why the contextual interference (CI) effect in retention of motor skills occurs. It was hypothesized that the high-CI or random group performs better on a retention test than the low-CI or blocked group because the random schedule has included practice in retrieving motor tasks from long-term memory (LTM). This is the same information-processing activity required for successful retention test performance. In essence, both groups learn the motor task to the same extent, but the random group also learns to recall the task from LTM on demand. In the first …