Open Access. Powered by Scholars. Published by Universities.®

Biomedical Engineering and Bioengineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Theses/Dissertations

Life Sciences

Retrospective Theses and Dissertations

1993

Articles 1 - 3 of 3

Full-Text Articles in Biomedical Engineering and Bioengineering

A Field Portable Ultrasound System For Bovine Tissue Characterization , Kyle Harold Holland Jan 1993

A Field Portable Ultrasound System For Bovine Tissue Characterization , Kyle Harold Holland

Retrospective Theses and Dissertations

Efforts by beef producers and beef packers to reduce carcass losses and to move the industry to a value-based marketing system have renewed their interest in the development of new electronic grading techniques for assessing beef carcass composition. A custom ultrasonic data acquisition system has been developed for the purpose of investigating the feasibility of beef tissue characterization. The unit developed is a compact, hand-held, six channel battery-operated data logger capable of sampling A-mode ultrasound signals at a rate of 15 megasamples per second. A custom epoxy encapsulated ultrasound transducer array was developed to fit the inner curvature of the ...


Practice, Transfer And Performance Enhancement Of Fast Single-Joint Movements In Individuals With Down Syndrome , Gil Lúcio Almeida Jan 1993

Practice, Transfer And Performance Enhancement Of Fast Single-Joint Movements In Individuals With Down Syndrome , Gil Lúcio Almeida

Retrospective Theses and Dissertations

Eight individuals with Down syndrome practiced performing 100 elbow movements over one distance (36°), under the instruction to move "as fast as possible." The subjects were also pretested and posttested performing elbow flexion movements over four distances (18°, 36°, 54°, and 72°) "as fast as possible", and at a "comfortable speed" over 36°. For two of these distances (18° and 36°), the movements were also performed from a second starting position. They improved their motor performance between training sessions (110 movements), as measured by the kinematic and EMG parameters. This improvement performance was described by a logarithmic function. With training ...


In Vivo And In Vitro Evaluations Of A Bioactive Ceramic Tooth Root Implant , Gabriele Gruss Niederauer Jan 1993

In Vivo And In Vitro Evaluations Of A Bioactive Ceramic Tooth Root Implant , Gabriele Gruss Niederauer

Retrospective Theses and Dissertations

The objective of this research was to test both the in vitro and in vivo effects of implant surface properties on soft tissue attachment to a bioactive ceramic tooth root implant. The ceramic material used for the tooth root was a composite of tricalcium phosphate and magnesium aluminate spinel, which is called "osteoceramic." For the in vitro cell attachment assays, pure tricalcium phosphate and spinel materials were used in addition to the osteoceramic. The osteoceramic was treated to produce three different surface structures: smooth, irregular and rough. Characterization of the materials included scanning electron microscopy, elemental dispersive analysis, wetting angle ...