Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"Mean frequency."”.
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Noise analyzer--band-pass filter of variable width and mean frequency
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1941.
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Combined effects of prozac and hypothalmic mediated response on masseter muscle activity in the cat
… baseline before the infusion of the drug. Mean frequency values of early and late stimulation were calculated using the continuous wavelet transform. The effects of early stimulation of the medial hypothalamus upon response latencies were compared with those of the late stimulation. The …
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Visualizing muscular fatigue during running exercises with electromyography-derived variables.
… calculated four parameters to detect fatigue: mean frequency, root mean square amplitude, 2nd order Dimitrov spectral index, and fractal dimension. A validation trial with calf raises proved the reliability of these parameters. Results of the running trials showed that both gastrocnemius …
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Self-Perceptions of Iowa Public School Superintendents toward Occupational Stress
… purpose of this study was to determine (1) the frequency and intensity of occupational sources of stress as perceived by Iowa public school superintendents, (2) the relationship between perceived occupational sources of stress and demographic variables, and (3) stress management techniques used …
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Characteristics of Coherent Structures in Marine Atmospheric Surface Layer
… the ejections and sweeps is 20-250 m and their mean frequency is of order of 0.01-0.001 /s at mean wind speed of 5-12.6 m/s. Between the region of the upstream ejection and downstream sweep motions an inclined shear layer is often seen. The inclined angle of the shear layer has been observed to …
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Biological and Agronomic Aspects of Two Insect Predators of Switchgrass
… and temporal variation among cultivars for frequency of tiller infestation by switchgrass moth larvae in mature stands in the northern Great Plains and if variation in biomass production was associated with variation in frequency of infestation, in two trials (plots/established in 2004 and …
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Interacting Ultracold Alkali Atomic Fermion Gases and Radio-Frequency Spectroscopy
The last chapter focuses on radio-frequency spectroscopy of multi component fermion gases. Rf experiments of 6Li and 40K are first reviewed. We show that rf experiments essentially measure spin correlation functions, and internal symmetries of the interparticle interactions constrain the rf …
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A comparison of fast and slow contraction speeds using electromyography
… were integrated EMG (iEMG), percent change in mean frequency, and time to muscular failure. Integrated EMG measurements revealed significantly greater muscle activity for the slow contractions (t = 4.76, p {dollar}<{dollar}.001). The time to muscular failure also showed significant differences …
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The effect of the elementary science study on selected science skills of educable mentally retarded students
… educational levels.There was an increase in the frequency of mean verbal expression scores and the frequency of mean observations made by students. There was a corresponding decrease in the mean frequency of inferences made by students from primary through senior high.In combining all educational …
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The burden and cost of sickness absenteeism amongst healthcare workers at a teaching hospital in South Africa. A cross-sectional study.
… The overall SRA prevalence was 2.63%. The mean duration of absence was 2.25 days per episode and the mean frequency was 2.65 episodes per annum. Conditions of the musculoskeletal system (40.1%) were the most commonly reported, followed by acute infections of the upper respiratory tract …
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Cultural Competence Among Oncology Health Care Providers
… some demographics questions. Descriptive (e.g. mean, frequency distributions) and inferential (e.g. t-test, one-way analysis of variance) statistics were used to analyze the data.</p> <p>Findings of the study showed that the levels of cultural competence among oncology health care providers were …
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Breast self-examination: the evaluation of strategies for promoting monthly home-practice
… was measured during a 7 month period by means of an indirect behavioral measure. Results indicated that although experimental conditions did not differ with respect to mean frequency of BSE, they did differ in terms of proportion of noncompliers and high compliers. The prompt conditions …
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An Assessment of Secondary Schools’ Head Teachers Effective Supervision in Teaching and Learning Process in Kinondoni Municipality
… presented in a form of descriptive statistics (mean, frequency). Also Chi-square test was used in analyzing the effect of head of school supervision of teaching and learning activities..The study found that High Performing Schools (HPS) had effectiveness in supervising teaching and learning …
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A study of the English reading comprehension strategies utilised by level-one students at the University of Venda
… research approaches). Data were collected by means of a self-completion questionnaire of the Survey of Reading Strategies (SORS) developed by Mokhtari and Sheorey. The researcher employed descriptive statistics to analyse frequency use of each reading strategy using frequency, percentage, …
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The Role of Male Vocal Signals During Male-Male Competition and Female Mate Choice in Greater Prairie-Chickens (<i>Tympanuchus cupido</i>)
… were found to vocalize at a relatively lower mean frequency. Playbacks of familiar and unfamiliar males were conducted on the lek to assess the role of vocalizations during male-male competition. Males responded to the prairie-chicken treatments by vocalizing at a faster rate and approaching …
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Strategies of adaptation to age-related losses in everyday activities of independent seniors
… everyday functioning, operationalized as the mean frequency of activities, and subjective well-being. Results from path analysis indicated that personal resources were associated with the use of specific SOC processes. Richer physical health resources predicted more optimization, whereas …
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A Family-Based Cognitive-Behavioral Intervention for Pediatric Patients with Sickle Cell Disease
… from baseline to 6-month post-treatment. The mean frequency of pain symptoms also decreased for five of the eight participants (i.e., visual inspection of the daily diaries from baseline to treatment). Conclusions: These results suggest the potential for clinical gains through the …
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The generation mechanisms of acoustic emission in metal cutting
… rate, but decrease with temperature, and the frequency content of AE is predicted to increase with strain rate, decrease with temperature, and remain unchanged with strain. <br/><br/>In order to access the validity of the above-mentioned model, two sets of metal cutting experiments were …
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Characteristics of muscle activation patterns at the ankle in stroke patients during walking.
… use with sEMG. These techniques have focussed on frequency domain features using wavelet analysis and muscle activation patterns using principal component analysis. The system has been used to measure gait from stroke patients and un-impaired subjects. Characteristic patterns of activity from the …
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Equine Spermatogenesis: Meiotic Chromosome Behavior and Recombination
… haploid gametes. Analysis of recombination frequency and distribution are crucial for genomic and association studies. Any alteration of the recombination frequency and positioning can cause non-disjunction and generation of aneuploidy. The frequency and distribution of chiasmata were …
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