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 3219 for “"Pulse"”.
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Pulse-width and pulse-time modulators
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1947.
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Pulse computation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Femtosecond optical pulse shaping and multiple-pulse femtosecond spectroscopy
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Taking nature's pulse
People have taken delight in nature throughout human history, but more recently the work of the natural historian has become more like that of the scientist. Using methods and tools of science, today's naturalists can record nature with precision-and through this, learn more about it. Ecologists …
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Digital pulse processing
… thesis develops an exact approach for processing pulse signals from an integrate-and-fire system directly in the time-domain. Processing is deterministic and built from simple asynchronous finite-state machines that can perform general piecewise-linear operations. The pulses can then be converted …
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Newborn Pulse Oximetry Screening
… feasible for New Zealand to introduce nationwide pulse oximetry screening for the detection of these anomalies in newborns. Data from national databases were merged to compile a dataset of infants and fetuses with critical cardiac disease in New Zealand between 2006 and 2015, which was …
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Semiconductor-magnetic pulse generators
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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Flow field investigation in pulse 1 motor of a two-pulse solid rocket motor
… in this investigation of the flow field in the pulse I motor of a two-pulse solid rocket motor. A full scale model of clear acrylic material was constructed to allow direct visual access of the flow field. The experiment, which was conducted with one of the VPI water analogy rigs, simulated the …
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Pulse Coding for ionospheric radar
… low power transmission using long sequence pulse coding. The main idea of the coding technique is to make use of the good correlation properties of certain codes to implement better Signal-to-Noise Ratio. A 1019-bit Legendre sequence is going to be used in the CADI system. For the Barker 13, …
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PDA based ambulatory pulse oximeter
… aim of the research was to develop an ambulatory pulse oximeter which can be used to monitor the SpO_2 heart rate (HR) and plethsymograph (PPG) waveform of a person. To achieve this, an algorithm was developed in LabVIEW 8.0 to extract the HR, SpO_2 and PPG data from a Nonin Xpod device, Nonin …
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High Voltage Pulse Measurement System
… accurately measure high voltage, high frequency pulses in harsh EM environments. High voltage pulses apply to medical, plasma, and food industries. The difficulty of accurately measuring high voltage pulses continues to pose an issue. Measuring high voltage systems can cause damage to the system, …
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Pulse Time-Code Modulation System
In conventional systems of pulse-code modulation (PCM), the signal is sampled at a constant frequency, and pulse groups representing the signal amplitude are transmitted. The sampling frequency has to be related to the highest frequency in the signal; consequently, the sampling frequency is higher …
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Data transmission by pulse compression
Pulse compression techniques originated in radar.The present work is concerned with the utilization of these techniques in general, and the linear FM (LFM) technique in particular, for comnunications. It introduces these techniques from an optimum communications viewpoint and outlines their …
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Pulse time-code modulation system
… of sampling. The new method has been called pulse time-code modulation (PTCM).The sampling in PTCM is achieved by dividing the full range of the signal amplitude into quantizing levels. When the signal crosses one of these levels the time measurement starts. It continues until another …
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On Sequential Pulse Position Demodulation
Made available in DSpace on 2014-12-12T20:54:16Z (GMT). No. of bitstreams: 1 7606918.pdf: 1847411 bytes, checksum: 1dd8ed113ec2f4525780f4a55347b37c (MD5) Previous issue date: 1975
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Frequency domain secondary pulse estimation
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Nanosecond pulse discharges in electronegative gases
… gap subjected to highly overvolted nanosecond pulses. The electrode separation is 1 cm. U.V. radiation is applied prior to the arrival of the pulse to the gap. In C2Fg-Ar mixtures the pressure ranges from 500 Torr to 960 Torr and the overvoltage ranges from 50% to 300%. After the i n i t i a l …
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Scaling and Gating Attosecond Pulse Generation
… for attosecond light sources delivering coherent pulses in the extreme ultraviolet spectral region. Such light sources are employed for a variety of applications within imaging, attosecond spectroscopy, and high-precision frequency metrology. However, the rather low efficiency of the HHG process, …
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