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.
Results
Showing 1 to 15 of 15 for “"waveform analysis"”.
-
An assessment of the role of Doppler ultrasound velocity waveform analysis of the umbilical artery in the diagnosis of fetal distress in labour
… of the role of Doppler ultrasound velocity waveform analysis of the fetal umbilical arteries in the diagnosis of fetal distress in labour is made from a review of the literature and clinical study. Study objectives: 1) To determine the value of screening with Doppler ultrasound in high-risk …
-
Interactive tools for sound signal analysis
… representation model for speech and sound waveform analysis and synthesis. This sinusoidal representation model can also be used for a variety of sound signal transformations such as time-scale modification and frequency scaling. The above sound analysis/synthesis sinusoidal representations …
-
AORTIC STIFFNESS MODIFICATIONS AFTER ENDOVASCULAR AORTIC REPAIR
… hindering measurement with tonometer or wave analysis (e.g. atrial fibrillation, compromised skin integrity). Data collection encompassed demographic information, comorbidities, medication use, vital signs, and laboratory values. PWV was calculated preoperatively and postoperatively, and …
-
Parallelization of ECG template-based abnormality detection
… several alternatives for distributing the analysis of ECG data over multiple processors. Parallel algorithms utilizing Correlation Waveform Analysis (CWA) were implemented to compare individual heartbeats and form heartbeat templates. The purpose of the templates is to exhibit the different …
-
The measurement of flow velocity distribution
… are made from an experimental flow rig. A waveform analysis program is used to analyse these measurements. The Fourier transform deconvolution is shown in this case to have poor noise immunity. For this reason, an alternative method of Bayesian deconvolution is investigated. The correlation …
-
The investigation of the calcium antagonist nifedipine on fetal umbilical artery Doppler waveforms
… calcium antagonist) on the Doppler flow velocity waveform of the umbilical artery. The thesis is divided into two parts. The first section is a literature review of the three main aspects of the thesis namely: 1. The uteroplacental circulation in humans and the pathophysiology related to this …
-
A data mining approach for acoustic diagnosis of cardiopulmonary disease
… However, recent advances in lung sound analysis techniques allow for the auscultation to be performed with an array of microphones, which send the lung sounds to a computer for processing. The computer automatically identifies adventitious sounds using time expanded waveform analysis and …
-
Analysis of Seismic Signatures Generated from Controlled Methane and Coal Dust Explosions in an Underground Mine
… different events were analyzed using standard waveform analysis procedures in order to estimate the moment magnitude and radiated seismic energy. The procedures used to analyze the data were conducted using self-produced programs not available with existing commercial software. The signatures …
-
Acoustic emission from the crystallization of potassium bromide doped with lead
… image whiteness was reached. The acoustic waveforms detected during the growth of the KBr morphologies were compared with artificially produced signals of bulk fracture and crystal impact. Acoustic waveform analysis showed these classes of signals to be distinguishable.
-
Seismic discontinuities and order estimation using wavelets : a receiver function approach
… in the mantle transition zone through waveform analysis of Pds converted waves. The converted phases are isolated through a single station/multiple event receiver function technique which uses a wavelet deconvolution and denoising known as WaRD. It is an edge-preserving damped least …
-
An altimeter waveform model for combined surface and volume scattering
… must also be accounted for in these return waveforms. This pulse penetration affects the altimeter range measurements as well as other information that is derived from the altimeter waveform data. To aid in the study of pulse penetration effects, a waveform model for combining surface and …
-
Echolocation in wild killer whales (Orcinus orca)
… recordings aurally, and by spectrographic and waveform analysis. Most clicks occurred in series (trains), but isolated clicks were occasionally detected. Echolocation behaviour differed strikingly between residents and transients. An echolocation index (EI) was defined as the average percentage …
-
An investigation into the potential of advanced sensor technology to support the maintenance of pipeline distribution systems
… methods, were validated using attenuation and waveform analysis. Defect size and progression (i.e. the pattern characteristics of the defect) were monitored, measured and identified through spectrum analysis of multiple emission signals in combination with a number of frequency bands. Two …
-
Evaluation of room-temperature semiconductor detectors for ultrahigh resolution pet imaging
The evaluation of a room-temperature semiconductor detector for ultrahigh resolution positron emission tomography (PET) imaging is presented. The approach is based on the use of a CdTe semiconductor detector. The detector is a 2mm thick cadmium telluride (CdTe) detector with a pixel pitch of 350μm …
-
Studies of vascular function in patients with heart failure and either preserved or reduced left ventricular systolic function
… stiffness. In contrast, arterial diastolic waveform analysis failed to show any significant differences in derived parameters of arterial compliance between the three study groups, which may be due to the fact that all three groups were matched for underlying coronary heart disease, reducing …