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ItemThe Design of a Family of Parametric Anatomically-Based Compliant Buttock Models to Evaluate Wheelchair Cushion Performance - Fabrication Package(Georgia Institute of Technology, 2022-07) Deshpande, Yogesh ; Sprigle, StephenThe evaluation of wheelchair cushion performance is of interest to a variety of stakeholders. Over the years, several buttocks models have been used to evaluate wheelchair cushion performance. These vary in design and purpose, and can be generally classified as either rigid or compliant. To date, published studies using buttock models have been limited to using a single size model. Thus, they were designed to evaluate one size of cushions. A need exists to define a series of models that can be used to evaluate cushions of varying sizes. The objective of this project was to develop a family of compliant buttock models that are based upon the anatomical parameters of persons with varying body sizes. This paper will detail the designs, describe the anatomical basis for the design and provide the rationale for the design decisions. Supplemental material includes greater detail; the full CAD files and model fabrication instructions are available in an open access repository for persons who wish to fabricate the models.
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ItemVideo Demonstrations of Over-Ground AMPS Trials with Intermittent Torque-Controlled Propulsion(Georgia Institute of Technology, 2020-10-12) Misch, Jacob P. ; Sprigle, StephenThis repository contains videos of the Anatomical Model Propulsion System (AMPS) performing straight and curvilinear maneuvers to characterize the performance of various manual wheelchair configurations. The AMPS was configured with a torque-based motor controller. Different trajectories were deployed for different chairs. The straight maneuver features three 'acceleration phase' pushes followed by four 'steady-state phase' pushes, then the system is allowed to gradually coast to a rest. The slalom maneuver starts with one bilateral push to align the casters straight forward, followed by four alternating unilateral pushes to generate the serpentine-like turning motion. K0004 (high-strength lightweight) chairs were tested over tile and carpet, and were given higher torques than the K0005 (ultra-lightweight) chairs to achieve similar motion. Plots of each of the torque profiles are attached in .png format.
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ItemVideo: Skeletal Displacement and Shear Strain Example During Head of Bed Elevation(Georgia Institute of Technology, 2019) Sonenblum, Sharon E. ; Sprigle, StephenThis realtime MRI video demonstrates the caudal displacement of the spine relative to the skin when the head of the bed is elevated 30 degrees. Friction with the sheets keeps the skin from slipping. This video is a great teaching tool to demonstrate internal shear strain in the adipose near the sacrum and coccyx, and it serves as a nice counterpart to the published article: Sprigle, S. and S. Sonenblum, Visualizing Tissue Strain Under the Sacrum and Coccyx in Different Supine Postures: A Case Series. Adv Skin Wound Care, 2019, in which static measurements of skeletal displacement are reported.
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ItemVideo Demonstrations of Component- and Systems-Level Test Methods for Wheelchair Propulsion Characterization(Georgia Institute of Technology, 2018-11) Huang, Morris ; Misch, Jacob ; Sprigle, StephenThe five videos included in this repository demonstrate the fundamental test methods used to characterize performance of various wheelchair components. The Anatomical Model Propulsion System (AMPS) was designed to emulate the weight distribution and force application of a human wheelchair user. Three canonical maneuvers were identified to quantify the effects of rolling resistance, drive wheel scrub, and caster swivel. The ‘AMPS straight.mp4’ file shows the straight maneuver. ‘AMPS left FW turn.mp4’ demonstrates a fixed-wheel turn, where one wheel is locked and scrubbing against the floor as the chair drives the other wheel. The ‘AMPS CCW.mp4’ shows an alternating zero-radius maneuver designed to cause caster swivel by driving the wheels in opposing directions. Also included in this directory are videos representing the standalone coast-down and scrub torque component tests. ‘Caster Wheel Coast-down Test Video.m4v’ shows the coast-down cart loaded with weights and instrumented with accelerometers to log the deceleration of the cart. This test measures the force of rolling resistance acting on the cart. The final video, ‘scrub test demo.mp4’, shows the test rig used to measure scrub torque. A ZwickRoell materials testing machine pulls the steel cable attached to a pulley system, which rotates the load arm and effectively scrubs the tile or carpet swatch against the fixed wheel. These videos were taken in 2017 to use as demonstrations for future researchers and collaborators. More information can be found in Morris Huang’s dissertation located at http://hdl.handle.net/1853/59253.
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ItemNatural Communications(Georgia Institute of Technology, 2009-02-25) Sater, MichaelHow do groups transform? By moving corporate communications from rigid planning to strategic collaboration, companies will spark change. Nature provides many clues to various systems that can teach us how to improve our communication with one another, and how those systems can transmit the cultural and institutional values we wish to convey to our employees, partners, stakeholders and customers
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ItemThe Natural Aspect of Mobile Interfaces: Becoming Borg, Designing Body Worn Technolgy(Georgia Institute of Technology, 2009-01-14) Starner, Thad ; Zeagler, ClintGeorgia Tech professors Thad Starner and Clint Zeagler discussed the natural aspect of mobile interfaces and the special challenges of designing technology for human mobility and interaction. Thad and Clint presented examples of designing body worn technology by looking at case studies from their collaborative course "Wearable Designs / Mobile and Ubiquitous Computing".
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ItemDesign Approaches for Surgical Applications(Georgia Institute of Technology, 2008-11-19) Chin, Albert K.The lecture will focus on understanding the natural system of human beings at the intersection of design and technology. Innovation in surgical therapy must consider the elements of procedural function, user learning curve, regulatory requirements and patient cost. Dr. Chin will discuss the application of specific examples of technique and device solutions to a variety of clinical situations to illustrate approaches to surgical design.
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ItemBiologically !nspired design(Georgia Institute of Technology, 2008-09-17) Yen, JeannetteScience and technology are increasingly hitting the limits of approaches based on traditional disciplines, and Biology may serve as an untapped resource for design methodology, with concept-testing having occurred over millions of years of evolution. By understanding biological principles and translating them into human built systems, Biologically Inspired Design can be used to develop new materials, new sensing and locomotory systems, more efficient and “green” chemical processes, and more environmentally conscious design and manufacturing systems. This unique method trains scientists and engineers and designers to ask, “what problems does this biological system solve?” teaches biologists to identify potential design solutions relevant to specific technological problems, and gives designers sufficient knowledge and familiarity with biology to seek solutions from the organic world. Biological systems at all levels use life-friendly materials manufactured at room temperatures, often operate under energetic limitations. Biological models may thus be excellent guides for novel technologies and ways to reduce energy consumption and reliance on scarce or toxic materials and also help transform our view of the natural world. Experiencing the benefits of Nature as a source of innovative and inspiring principles encourages us to preserve and protect the natural world rather than simply to harvest its products. At the Georgia Institute of Technology, the goal of the Center for Biologically-Inspired Design is to facilitate, develop infrastructure for, and promote interdisciplinary research and education.
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ItemCrossing Boundaries in Design: Alternative Careers in Design(Georgia Institute of Technology, 2008-02-27) Lorenc, Jan ; Yoo, Chung YoulAfter 30 years in practice Jan Lorenc of Lorenc +Yoo Design always strives to reinvent themselves in what they do and how they apply their training in industrial design, graphic design, and architecture. Jan and Chung will showcase the firm’s work in exhibition design, sculpture, furniture, environmental graphics, and feature projects around the world.
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ItemFrom Real to Virtual and Back(Georgia Institute of Technology, 2008-01-30) Diana, CarlaCarla Diana will talk about her experience as an industrial and interaction designer dealing with user experiences both digital and physical. Through a showcase of client work, personal research and art installations, she will demonstrate how ideas, experiences and seamless influences form richer and deeper solutions than those attained through traditional processes alone. Carla Diana is a creative professional with over 15 years of experience. She holds an MFA in Design from Cranbrook Academy of Art and a BME from the Cooper Union. She has worked at Frog Design, Sarkissian-Mason, DDB Needham and Karim Rashid studio. She is a founding partner of Spank, design consultancy and creator of Repercussion.org interactive sound. She has also taught design at Parsons School of Design, Savannah College of Art and Design.