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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
231

Acoustical methods to evaluate pore fluid saturant through casing

García Osuna, Fernando, 1961- 30 March 2011 (has links)
Not available / text
232

Sonic Pest Repellents

Aflitto, Nicholas, DeGomez, Tom 10 1900 (has links)
Revised; Originally Published: 2014 / 4 pp. / Sonic pest devices are tools that emit sound in the attempt to repel, deter, or kill unwanted animals such as insects, rodents, birds and large mammals. There are many commercially available sonic pest devices that claim to be effective.Commercially available sonic pest devices for use in residential applications have not been shown to be effective in scientific studies. For this reason, use of these devices is not advised to treat common pest problems. Although some researchers are developing sonic techniques that illustrate promise for very specific pests, these technologies are yet to be commercially available.
233

Nondestructive examination utilizing ultrasonic Lamb waves

Fentnor, Louis Hoyt, 1926- January 1968 (has links)
No description available.
234

An investigation of hot and cold applications to the skin and subsequent muscle temperature during the administration of ultrasound

Collins, Ellen Virginia, 1951- January 1974 (has links)
No description available.
235

Plokščiojo "svyruojančio strypo" tipo virpesių keitiklio tyrimas ir taikymas pjezoelektriniuose linijiniuose varikliuose / Analysis of flat actuators of type "a shaking beam" and their use in piezoelectric linear motors

Adomaitis, Irmantas 15 June 2005 (has links)
The work consists of the introduction, two chapters, basic results of the work, conslusions and the list of used literature. Theorical methods of research are applyde in the work. The optimisation of systems of created ultrasonic motorsis carried out using programmable equipment ANSYS 6.1. This work provides analysis of own resonant freaquencies of ultrasonic actuators and establishes the dependence of amplitudes on suspense in piezoelements. The dynamic analysis of ultrasonic actuators was carred out and the trajectory of movementof exit chain points was established.
236

Virpamų sistemų matematinis modeliavimas / Mathematical modelling of ultrasonic vibration systems

Žukovska, Ana 20 June 2005 (has links)
Talking about ultrasonic vibration we can say that it is the essential thing of experimental physics science. The ultrasound is applied amply, for example in: medicine and pharmacy, dimensional and diagnostics devise, mechatronic, mine working, building, automobile and aliment industry, textile industry, connection, energetic – that is not all the actions ranges off people doing, where he is applying. Although hypersonic technologic rise and begin proceed lately, however they are taking the strongest positions in science and technique. Ultrasonic vibration systems (UVS), are designed for push realization, the main function is - interaction with other solid at the dot and to establish the secret elliptical movement trajectory. Also we need a control of this movement, stabilized cooperating with other solids and to keep particular dynamic parameters. Destination of the work: To establish mathematical model of ultrasonic vibration systems (UVS) and to explorer his work dot characterizations. Tasks: 1. Classification, material analysis of existing elliptical movement formative ultrasonic vibration systems (UVS), construction internal, resilient wave spread forms, vibration stimulation tempers. 2. To examine made-up system by finite essential method : determine her vibration parameters – her forms and frequencies; to take measurements of dots, witch formative elliptical trajectory vibration displacement and to establish their movement trajectory. 3. To compare by analytical... [to full text]
237

In vitro continuous monitoring of cardiac output using ultrasound doppler in pulsatile flow

Ruo, Jeanny Bin-chin 08 1900 (has links)
No description available.
238

In vitro assessment of pressure gradient across infundibular pulmonary and sub-aortic stenoses using doppler ultrasound

Jimoh, Abdulganiyu A. 12 1900 (has links)
No description available.
239

Effect of diagnostic ultrasound on the developing chick embryo

Rivers, Dale Ball 08 1900 (has links)
No description available.
240

Size and lifetime of transient cell membranes disruptions created by acoustic cavitation

Schlicher, Robyn 05 1900 (has links)
No description available.

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