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You searched for +publisher:"Georgia Tech" +contributor:("Sprigle, Stephen H."). Showing records 1 – 3 of 3 total matches.

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Georgia Tech

1. Obrien, John James. SYSTEM DESIGN OF AN ACTIVITY TRACKER TO ENCOURAGE BEHAVIORAL CHANGE AMONG THOSE AT RISK OF PRESSURE ULCERS.

Degree: MS, Computer Science, 2019, Georgia Tech

The Wheelchair In-Seat Activity Tracker (WiSAT) is a sensor-based activity tracker aimed at encouraging in-seat movement among wheelchair users who are at risk of pressure ulcers. Pressure ulcers tend to form in the buttocks or thighs of a wheelchair user due to a lack of pressure redistribution in that part of the body. Pressure ulcers are a serious risk to many wheelchair users due to a plethora of harmful side-effects, such as infection, hospitalization, and long recovery times. However, in-seat movements, such as weight shifts, have been linked with the occurrence of pressure ulcers. WiSAT began as a research tool that enabled researchers to monitor the in-seat activity of wheelchair users during their daily lives through sensor-based reporting, as opposed to relying solely on the self-reporting of research participants. Through the efforts described in this thesis, WiSAT was transformed from a research tool into a consumer product. Specifically, this thesis describes the design, development, and integration of WiSAT’s subsystem through four specific aims: 1. Design and evaluation of a user-interface based upon principles of Health Behavioral Change Theory. 2. Coupling of the Hardware and Smartphone App Subsystems 3. Preparation of the Algorithm Subsystem 4. Integration of the WiSAT Subsystems through Multi-layered Architecture for the WiSAT Smartphone App Advisors/Committee Members: Sprigle, Stephen H (advisor), Sonenblum, Sharon E (committee member), Ploetz, Thomas (committee member).

Subjects/Keywords: Wheelchair in-seat activity tracker; wisat; activity tracker; pressure ulcers; behavioral change; system design; consumer product development

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Obrien, J. J. (2019). SYSTEM DESIGN OF AN ACTIVITY TRACKER TO ENCOURAGE BEHAVIORAL CHANGE AMONG THOSE AT RISK OF PRESSURE ULCERS. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/61221

Chicago Manual of Style (16th Edition):

Obrien, John James. “SYSTEM DESIGN OF AN ACTIVITY TRACKER TO ENCOURAGE BEHAVIORAL CHANGE AMONG THOSE AT RISK OF PRESSURE ULCERS.” 2019. Masters Thesis, Georgia Tech. Accessed October 23, 2019. http://hdl.handle.net/1853/61221.

MLA Handbook (7th Edition):

Obrien, John James. “SYSTEM DESIGN OF AN ACTIVITY TRACKER TO ENCOURAGE BEHAVIORAL CHANGE AMONG THOSE AT RISK OF PRESSURE ULCERS.” 2019. Web. 23 Oct 2019.

Vancouver:

Obrien JJ. SYSTEM DESIGN OF AN ACTIVITY TRACKER TO ENCOURAGE BEHAVIORAL CHANGE AMONG THOSE AT RISK OF PRESSURE ULCERS. [Internet] [Masters thesis]. Georgia Tech; 2019. [cited 2019 Oct 23]. Available from: http://hdl.handle.net/1853/61221.

Council of Science Editors:

Obrien JJ. SYSTEM DESIGN OF AN ACTIVITY TRACKER TO ENCOURAGE BEHAVIORAL CHANGE AMONG THOSE AT RISK OF PRESSURE ULCERS. [Masters Thesis]. Georgia Tech; 2019. Available from: http://hdl.handle.net/1853/61221


Georgia Tech

2. Huang, Morris. Development of component and system level test methods to characterize manual wheelchair propulsion cost.

Degree: PhD, Mechanical Engineering, 2017, Georgia Tech

The current approach to manual wheelchair design lacks a sound and objective connection to metrics for wheelchair performance. The objective of this research was three-fold: 1) to characterize the inertial and resistive properties of different wheelchair components and configurations, 2) to characterize the systems-level wheelchair propulsion cost, and 3) to model wheelchair propulsion cost as a function of measured component and configuration properties. Scientific tools developed include 1) a series of instruments and methodologies to evaluate the rotational inertia, rolling resistance, and scrub torque of wheelchair casters and drive wheels on various surface types, and 2) a wheelchair-propelling robot capable of measuring propulsion cost across a collection of maneuvers representative of everyday wheelchair mobility. This suite of tools were used to demonstrate the variance manifested in the resistive properties of 8 casters and 4 drive wheels, and the impact/tradeoffs of these components (as well as mass and weight distribution) on system-level wheelchair propulsion cost. Coupling these findings with a theoretical framework describing wheelchair dynamics resulted in two empirical models linking system propulsion cost to component resistive properties. The outcomes of this research empower clinicians and users to make more informed wheelchair selections, as well as offer manufacturers a basis by which to optimize their wheelchair designs. Advisors/Committee Members: Sprigle, Stephen H. (advisor), Chang, Young-Hui (committee member), Ueda, Jun (committee member), Ferri, Aldo A. (committee member), Ghovanloo, Maysam (committee member), Greig, Mark (committee member).

Subjects/Keywords: Wheelchair; Robotics; Propulsion cost; Test method design; AMPS

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APA (6th Edition):

Huang, M. (2017). Development of component and system level test methods to characterize manual wheelchair propulsion cost. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59253

Chicago Manual of Style (16th Edition):

Huang, Morris. “Development of component and system level test methods to characterize manual wheelchair propulsion cost.” 2017. Doctoral Dissertation, Georgia Tech. Accessed October 23, 2019. http://hdl.handle.net/1853/59253.

MLA Handbook (7th Edition):

Huang, Morris. “Development of component and system level test methods to characterize manual wheelchair propulsion cost.” 2017. Web. 23 Oct 2019.

Vancouver:

Huang M. Development of component and system level test methods to characterize manual wheelchair propulsion cost. [Internet] [Doctoral dissertation]. Georgia Tech; 2017. [cited 2019 Oct 23]. Available from: http://hdl.handle.net/1853/59253.

Council of Science Editors:

Huang M. Development of component and system level test methods to characterize manual wheelchair propulsion cost. [Doctoral Dissertation]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59253

3. Wang, Fengtao. Optical interconnects on printed circuit boards.

Degree: PhD, Electrical and Computer Engineering, 2010, Georgia Tech

The ever-increasing need for higher bandwidth and density is one of the motivations for extensive research on planar optoelectronic structures on printed circuit board (PCB) substrates. Among these applications, optical interconnects have received considerable attention in the last decade. Several optical interconnect techniques, such as free space, guided wave, board level and fiber array interconnects, have been introduced for system level applications. In all planar optoelectronic systems, optical waveguides are crucial elements that facilitate signal routing. Low propagation loss, high reliability and manufacturability are among the requirements of polymer optical waveguides and polymer passive devices on PCB substrates for practical applications. Besides fabrication requirements, reliable characterization tools are needed to accurately and nondestructively measure important guiding properties, such as waveguide propagation loss. In three-dimensional (3D) fully embedded board-level optical interconnects, another key challenge is to realize efficient optical coupling between in-plane waveguides and out-of-plane laser/detector devices. Driven by these motivations, the research presented in this thesis focuses on some fundamental studies of optical interconnects for PCB substrates, e.g., developing low-loss optical polymer waveguides with integrated efficient out-of-plane couplers for optical interconnects on printed circuit board substrates, as well as the demonstration of a novel free-space optical interconnect system by using a volume holographic thin film. Firstly, the theoretical and experimental investigations on the limitations of using mercury i-line ultraviolet (UV) proximity photolithography have been carried out, and the metallization techniques for fine copper line formation are explored. Then, a new type of low-loss polymer waveguides (i.e., capped waveguide) is demonstrated by using contact photolithography with considerable performance improvement over the conventional waveguides. To characterize the propagation properties of planar optical waveguides, a reliable, nondestructive, and real-time technique is presented based on accurately imaging the scattered light from the waveguide using a sensitive charge coupled device (CCD) camera that has a built-in integration functionality. To provide surface normal light coupling between waveguides and optoelectronic devices for optical interconnects, a simple method is presented here to integrate 45° total internal reflection micro-mirrors with polymer optical waveguides by an improved tilted beam photolithography (with the aid of de-ionized water) on PCBs. A new technique is developed for a thin layer of metal coating on the micro-mirrors to achieve higher reflection and coupling efficiency (i.e., above 90%). The combination of the capped waveguide technique and the improved tilted UV exposure technique along with a hard reusable metal mask for metal deposition eliminates the usage of the traditional lift-off process, greatly simplifies the process, and… Advisors/Committee Members: Adibi, Ali (Committee Chair), Chang, Gee-Kung (Committee Member), Naeemi, Azad J (Committee Member), Ralph, Stephen E (Committee Member), Sprigle, Stephen H. (Committee Member).

Subjects/Keywords: Polymer optical waveguides; Printed circuit boards; Optical interconnects; Micro-mirrors; Printed circuits; Photolithography; Optoelectronic devices; Integrated optics

…Center at Georgia Tech. Furthermore, ultra fine copper line routing substrates are demonstrated… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Wang, F. (2010). Optical interconnects on printed circuit boards. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/37133

Chicago Manual of Style (16th Edition):

Wang, Fengtao. “Optical interconnects on printed circuit boards.” 2010. Doctoral Dissertation, Georgia Tech. Accessed October 23, 2019. http://hdl.handle.net/1853/37133.

MLA Handbook (7th Edition):

Wang, Fengtao. “Optical interconnects on printed circuit boards.” 2010. Web. 23 Oct 2019.

Vancouver:

Wang F. Optical interconnects on printed circuit boards. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2019 Oct 23]. Available from: http://hdl.handle.net/1853/37133.

Council of Science Editors:

Wang F. Optical interconnects on printed circuit boards. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/37133

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