731 research outputs found
Dissolvable Metal Supports - Simplifying Metals Printing
No full textabstract: Additive Manufacturing and 3D printing are becoming important technologies in the manufacturing sector. The benefits of this technology include complex part geometry, short lead-times, low waste, and simple user interface. However, the technology does not come without its drawbacks: mainly the removal of support structures from the component. Traditional techniques that involve sawing and cutting can be expensive and take a long time, increasing the overall price of 3D printed metal components. This paper discusses two approaches taken for dissolvable support structures in 3D printed stainless steel (17-4 PH). For the first time in powder bed fusion components, with the help of Christopher Lefky and Dr. Owen Hildreth, dissolvable support capabilities are achieved in metal prints. The first approach, direct dissolution, involves direct corrosion of the entire part, leading to support removal. This approach is not self-terminating, and leads to changes in final component geometry. The second approach involves a post-build sensitization step, which physically alters the microstructure and chemical stability of the first 100-200 microns of the metal. The component is then etched at an electric potential that will readily corrode this sensitized surface, but not the underlying base metal. An electrolytic solution of HNO3/KCl/HCl paired with an anodic bias was used for the direct dissolution approach, resulting in a loss of about 120 microns of material from the components surface. For the self-limiting approach, surface sensitization was achieve through a post build annealing step (800 C for 6 hours, air cooled) with exposure to a sodium hexacynoferrate slurry. When the slurry decomposes in the furnace, carbon atoms diffuse into the surface and precipitate a chromium-carbide, which reduces the chemical stability of the stainless steel. Etching is demonstrated in an anodic bias of HNO3/KCl. To determine proper etching potentials, open circuit potential and cyclic voltammetry experiments were run to create Potentiodynamic Polarization Curves. Further testing of the self-terminating approach was performed on a 316 stainless steel interlocking ring structure with a complex geometry. In this case, 32.5 hours of etching at anodic potentials replaced days of mechanical sawing and cutting
Author unknown letter, 1879-08-18
No full textLetter, author unknown (apparently a former resident of Harmar), discussing church activities and the author's depression and despair, especially over past events
Globalizing Occupational Therapy: Bridging Gaps In Community-Based Care Of The Dominican Republic Through Digital Education In Therapeutic Interventions
No full textTitle: Globalizing Occupational Therapy: Bridging Gaps in Community-Based Care of the Dominican Republic Through Digital Education in Therapeutic Interventions
Author: Laura Hildreth
Background: Stroke is the second leading cause of death and third leading cause of disability worldwide. Disability from stroke is especially found in low-resource settings where access to rehabilitation therapy services is limited. This paper presents the development of the Stroke Stride Rehab Program which is an evidence-based program aimed to improve stroke rehabilitation outcomes in rural and remote communities, specifically in Puerto Plata, Dominican Republic.
Methods: The development of Stroke Stride Rehab included a detailed and comprehensive needs assessment including a literature review and stakeholder consultations to identify key gaps and challenges in stroke rehabilitation. Using evidence-based practices, technology access, and input from key stakeholders, the program was created to educate OTs, PTs, and other allied health care professionals on OT rehabilitation techniques for stroke survivors and provide resources to share with stroke survivors.
Results: The Stroke Stride Rehab program integrates video-based interventions and activities, QR technology, and capacity-building by providing resources to local Occupational Therapists, Physical Therapists, and other allied health professionals. The program aims to empower healthcare professionals and improve adherence to therapy exercises and activities among stroke survivors by emphasizing repetition, regularity, and cultural competence of resources provided through utilizing video-based resources.
Discussion: The Stroke Stride Rehab program aims to improve stroke rehabilitation outcomes in rural communities using technology and community partnerships. Key challenges including ongoing training for healthcare professionals and equitable access to technology must be continually addressed for the program to remain sustainable. Future research should focus on evaluating the program’s effectiveness and research additional technology innovations that may be utilized to increase access to stroke rehabilitation therapy services.
Conclusion: Stroke Stride Rehab exemplifies a collaborative effort to address complex challenges endured by stroke survivors in rural communities. Through integrating evidence-based practices, stakeholder input, and technology resources, the program has the potential to create a meaningful impact on the quality of life for stroke survivors and serve as a model for innovative stroke rehabilitation practices in settings with limited resource access worldwide.Doctor of Occupational Therapy (OTD)Occupational Therap
A study of eighty-seven negro families referred by municipal juvenile court (non-support division) Memphis, Tennessee, to the family welfare agency of Memphis, Tennessee, to the family Welfare Agency of Memphis, Incorporated, from January 1, 1942 to December 31, 1943, 1944
No full textESTABLISHMENT OF SEROLOGICAL REFERENCE RANGES FOR ELK IN KENTUCKY AND EFFECTS OF QUARANTINE AND TRANSLOCATION ON ELK
No full textEstablishing blood serum profiles is important for understanding animal disease ecology and nutrition, the effects of capture and immobilization, and general physiological variation among individuals and populations. Elk (Cervus elaphus nelsoni) have been successfully translocated to several states for reintroduction or population augmentation, including most recently in Kentucky, where over the course of three years (2011-13) wild elk were captured, temporarily quarantined, and subsequently moved to Missouri and Virginia to establish populations in those states. I used this opportunity to collect a variety of biological samples, including blood from which I present and compare serological profiles for a variety of elk age and sex classes. Additionally, I took the opportunity to investigate the effects of the translocation process on some morphological and physiological parameters of elk. Quarantine and processing of elk can be stressful for animals and lead to injury or death. I characterized how elk respond to this process by measuring biochemical serum values along with various physiological parameters at 5 handling events from the time of capture until final transport to recipient states. Changes observed in parameters between paired workups were indicative of the physical exertion and stress associated with handling activities
Ocean resources and intergovernmental relations in the 1980's : Outer continental shelf hydrocarbons and minerals
No full text32 pages. Paper presented at Woods Hole Oceanographic Institution, September 12, 1985.The author utilizes the legal indicia, primary court opinions, of federal-state conflict over outer continental shelf oil and gas development in the 1980's to support more general observations about intergovernmental relations offshore.Oregon Sea Grant, NOAA grant number NA85AA-D-SG-09
Testing for the Hildreth-Houck random coefficient model
No full textThis thesis was scanned from the print manuscript for digital preservation and is copyright the author.
Researchers can access this thesis by asking their local university, institution or public library to
make a request on their behalf. Monash staff and postgraduate students can use the link in the References field
THE PRAIRIE NATURALIST Volume 33, No.4 December 2001
No full textSPECIES, SEASON, AND DENSITY OF BURIED SEEDS SURVIVING FOX SQUIRREL DEPREDATION ▪ C. C. Smith, and J. M. Briggs
RELATI0NSHIP OF HYDROLOGICAL CONDITIONS AND POPULATlONS OF BREEDING PIPING PLOVERS ▪ D. S. Licht,
DEMODICOSIS IN A WHITE-TAILED DEER (ODOCOILEUS VIRGINIANUS) IN SOUTH DAKOTA ▪ C. N. Jacques, J. A Jenks. M. B. Hildreth. R. J. Schauer, and D. D. Johnson
SURVEYS OF CALLING AMPHIBIANS IN NORTH DAKOTA ▪ D. H. Johnson, and R. D. Batie
EFFECTS OF HUMAN PRESENCE ON VOCALIZATIONS OF GRASSLAND BIRDS IN KANSAS ▪ S. L Bye, R. J. Robel, and K. E. Kemp
Reviewers 2001
Author Index - Volume 33 .
Subject Index - Volume 33 .
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Cave Conservation and Restoration
No full textOpen Access - Permission by Author(s) (2006 Edition) See Extended description for more information
Potential enforcement mechanisms for nonpoint source pollution controls
No full text68 pages. Report prepared for the Water Resources Research Institute, Oregon State University, with research support from the Environmental Protection Agency Region 10.In December 1994 the federal Environmental Protections Agency's Region 10 published "A Watershed Assessment Primer" (EPA 910-B-94-005). Appendix C of that report by this author, Mara Brown, and Robert Shavelson was an in-depth "Legal and Policy Analysis for Integrated Watershed Management, Cumulative Impacts, and Implementation of Non-Point Source Controls." This guidance report clarifies what legal authorities exist to comply with nonpoint source (NPS) pollution controls and evaluates federal and state NPS programs, statutes and regulations, local ordinances, case law, and a wide variety of secondary sources.Environmental Protection Agency Region 1
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