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 20 of 751 for “"transducer"”.
-
Transducer dynamics
Transducers are finite state automata with an output. In this thesis, we attempt to classify sequences that can be constructed by iteratively applying a transducer to a given word. We begin exploring this problem by considering sequences of words that can be produced by iterative application of a …
-
An electronically steered ultrasonic transducer.
Thesis. 1975. Sc.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
-
Automated Optimal Ultrasound Transducer Simulator
… by a human and finding the best possible set of transducer specifications becomes increasingly difficult as the number of simulations grows. Currently there is no automated system for evaluating the performance of a simulated ultrasound array. This thesis proposes an automated system for …
-
Structural Basis of GPCR-Transducer Signaling
… has emerged relatively recently as a signal transducer in its own right. Originally discovered as a desensitizer of receptor-mediated G protein signaling, βarrs have been proposed to compete with G protein for binding to the receptor intracellular core, thereby sterically blocking further G …
-
MEMS Transducer for Hearing Aid Device
… of implantable middle ear MEMS piezoelectric transducer for hearing aids was developed. The physical vibration deflection at the tip of the transducer is simulated using finite element method. Further, a study of thermoelastic damping effect of four designed MEMS mirrors used as resonators is …
-
Techniques for tailoring sonar transducer responses
This work is concerned with the design of sonar transducers operating in the frequency range 100 kHz to 1 MHz. The transducer frequency responses are predicted using a one-dimensional transmission line analysis. Differences between predicted and measured results are shown to be caused by intermodal …
-
Piezoelektrische Transducer zur elastooptischen Modulation in Glasfasern
… geeigneter piezoelektrischer Schallwandler (Transducer). Dabei werden sowohl Zinkoxid, als auch Polyvinylidenfluorid als piezoaktives Material genutzt. Alle Schallwandler werden auf ihre Eignung getestet und die Ergebnisse miteinander verglichen.
-
Automatic Particle Counting Using An Acoustic Transducer
… as they are accelerated through an acoustic transducer. The transducer consists of an inlet converging nozzle, a capillary tube and an expansion section. If the air is laden with particles, as the flow accelerates through the inlet, the particles cannot follow the large change in velocity due …
-
The Development of a Fluid Consistency Transducer
A robust fluid consistency transducer suitable for on-line industrial applications has been developed. Its particular application is the monitoring of primary sludge in sewage treatment plants. The transducer uses the effects of fluid loading on a mechanical resonator. This is in the form of a disk …
-
Development of a Modular Anti-HIV Transducer Protein
… proposed the design and development of anti-HIV transducer proteins, which will enter the cells and induce apoptosis only in cells infected with HIV. The initially inactive transducer is activated by the HIV protease cleavage forming a rearranged protein structure capable of activating procaspase …
-
Modeling of weak scatterers in a transducer beam
… A modeling approach that accounts for transducer beam diffraction effects, predicts the response from a three-dimensional spatial map of acoustic properties that is several wavelengths in size containing features that are on the order of the size of a cell, and relates the structure of …
-
Failure analysis of a 30kHz ultrasonic welding transducer
… system component which fails most often is the transducer, which is responsible for creating the vibration. The transducer converts electrical energy into mechanical energy by means of a polarized piezoelectric PZT (lead zirconate titanate) polycrystalline ceramic material using high frequency …
-
Characterisation of thick liquids using a vibrating transducer
This report describes in detail all the work carried out to reach the main objective of this thesis project, which is to develop a tuning fork into a portable instrument used for the characterisation of thick liquids based on their density and viscosity.
-
Design and Construction of an Anti-HIV Protease Transducer
… propose the design and development of Anti- HIV transducer proteins. Activation of these proteins is by the HIV protease, and when activated they cause the death of cells expressing the viral protease. This mechanism can be used to treat all cells within the host, with only those cells expressing …
-
Time and frequency domain modelling of the piezoelectric transducer
A new model for piezoelectric ultrasonic transducers is proposed. Using a systems engineering approach, the concept of feedback is used to explain secondary piezoelectric effects and to clearly describe electro-mechanical interaction. The model is derived from the fundamental piezoelectric …
-
Development of a medical bougie with integral force transducer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
-
Design and fabrication of a flexible membrane ultrasound transducer
… the opportunity to fabricate low-cost ultrasound transducers by contact printing. Contact printing was selected because it could be scaled for high-throughput manufacturing, and it could be performed at ambient temperature and pressure. For this thesis, a capacitive microscale ultrasound …
-
Determination of design parameters for a novel electroacoustical transducer
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1961
-
Serial digital multiplexing of transducer data for intrinsically safe applications
The galvanic isolation of fibre optic transmission offers a distinct advantage in the design of a telemetry system to meet intrinsic safety requirements. So far the usage of fibre optics in instrumentation systems has been largely confined to the implementation of point to point links due to the …
-
Design and reliability-based optimization of the piezoelectric flex transducer
… harvesting device called the piezoelectric flex transducer, which was developed by other researchers for the purpose of harvesting biokinetic energy from human gait. The optimization uses both conventional and reliability-based optimization approaches in order to improve the electrical power …
Page 1 of 38