Search Results - "Walker, Richard H."

A mechanistic understanding of ecological responses to land‐use change in headwater streams by Walker, Richard H., Walters, Annika W.

“…Anthropogenic activities, such as oil and natural gas development (ONGD), have significantly altered the landscape. It is often challenging to identify the…”
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Incidence of ‘Squeaking’ After Ceramic-on-Ceramic Total Hip Arthroplasty by Mai, Kenny, Verioti, Christopher, Ezzet, Kace A., Copp, Steven N., Walker, Richard H., Colwell, Clifford W.

“…The incidence of hip “squeak” associated with ceramic-on-ceramic bearings has been variably reported, ranging from 0.7% to 20.9%. We determined the patients’…”
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How low can you go? Widespread challenges in measuring low stream discharge and a path forward by Seybold, Erin C., Bergstrom, Anna, Jones, C. Nathan, Burgin, Amy J., Zipper, Sam, Godsey, Sarah E., Dodds, Walter K., Zimmer, Margaret A., Shanafield, Margaret, Datry, Thibault, Mazor, Raphael D., Messager, Mathis L., Olden, Julian D., Ward, Adam, Yu, Songyan, Kaiser, Kendra E., Shogren, Arial, Walker, Richard H.

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The Effect of the Orientation of the Acetabular and Femoral Components on the Range of Motion of the Hip at Different Head-Neck Ratios by DʼLIMA, DARRYL D, URQUHART, ANDREW G, BUEHLER, KNUTE O, WALKER, RICHARD H, COLWELL, CLIFFORD W

“…Prosthetic impingement due to poor positioning can limit the range of motion of the hip after total hip arthroplasty. In this study, a computer model was used…”
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Ceramic Liner Fracture and Impingement in Total Hip Arthroplasty by Steinhoff, Amy, Hakim, Victor, Walker, Richard H., Colwell, Clifford W., Copp, Steven N.

“…Background Ceramic-on-ceramic bearing surfaces were developed to provide an alternate to metal-on-polyethylene to decrease wear-induced osteolysis in total hip…”
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Portable Compression Device and Low-Molecular-Weight Heparin Compared With Low-Molecular-Weight Heparin for Thromboprophylaxis After Total Joint Arthroplasty by Edwards, John Z., MD, Pulido, Pamela A., BSN, Ezzet, Kace A., MD, Copp, Steven N., MD, Walker, Richard H., MD, Colwell, Clifford W., MD

“…Abstract This preliminary prospective study to determine the rate of deep venous thrombosis (DVT) examined 277 patients undergoing total knee or total hip…”
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Ecological research and management of intermittent rivers: an historical review and future directions by Leigh, Catherine, Boulton, Andrew J., Courtwright, Jennifer L., Fritz, Ken, May, Christine L., Walker, Richard H., Datry, Thibault

“…Summary Rivers and streams that do not flow permanently (herein intermittent rivers; IRs) make up a large proportion of the world's inland waters and are…”
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All in moderation: crayfish populations are affected by precipitation-driven habitat availability and water quality in a non-perennial stream by Walker, Richard H., Entrekin, Sally A.

“…Species conservation requires an understanding of the abiotic factors driving animal-environmental relationships, especially in dynamic ecosystems like…”
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Assessment of the floodplain fishery of Tonle Sap Lake in Cambodia by Thapa, Jyoti, English, Megan, Ou, Chouly, Lanoue, Julia, Walker, Richard H.

“…Across the globe, fish stocks have been in decline due to industrialization of fisheries resources, overfishing, pollution, and climate change, thereby…”
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Causes, Responses, and Implications of Anthropogenic versus Natural Flow Intermittence in River Networks by Datry, Thibault, Truchy, Amélie, Olden, Julian D, Busch, Michelle H, Stubbington, Rachel, Dodds, Walter K, Zipper, Sam, Yu, Songyan, Messager, Mathis L, Tonkin, Jonathan D, Kaiser, Kendra E, Hammond, John C, Moody, Eric K, Burrows, Ryan M, Sarremejane, Romain, DelVecchia, Amanda G, Fork, Megan L, Little, Chelsea J, Walker, Richard H, Walters, Annika W, Allen, Daniel

“…Abstract Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature on natural flow intermittence…”
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Should I stay or should I go: Hydrologic characteristics and body size influence fish emigration from the floodplain following an atypical summer flood by Walker, Richard H., Naus, Christopher J., Adams, Steven Reid

“…Floods play an important role in regulating ecological patterns and processes in river–floodplain ecosystems. Yet, the hydrologic connectivity between many…”
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Global review reveals how disparate study motivations, analytical designs, and focal ions limit understanding of salinization effects on freshwater animals by Walker, Richard H., Belvin, Abigail C., Mouser, Joshua B., Pennino, Amanda, Plont, Stephen, Robinson, Christopher D., Smith, Lucy B., Thapa, Jyoti, Zipper, Carl E., Angermeier, Paul L., Entrekin, Sally A.

“…Global salinization of freshwaters is adversely affecting biotic communities and ecosystem processes. We reviewed six decades (1960–2020) of literature…”
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Outcome and Range of Motion Using a High-flexion Cruciate-retaining TKA by Rosen, Adam S, Neville, Lorraine, Pulido, Pamela A, Patil, Shantanu, Walker, Richard H, Copp, Steven N

“…Increased knee flexion after total knee arthroplasty (TKA) may contribute to patients’ increased satisfaction and more active lifestyles. This study evaluated…”
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Anthropogenic land‐use change intensifies the effect of low flows on stream fishes by Walker, Richard H., Girard, Carlin E., Alford, Samantha L., Walters, Annika W., Heino, Jani

“…As ecosystems experience simultaneous disturbances, it is critical to understand how multiple stressors interact to affect ecological change. Land‐use change…”
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Take Care with Type C: Serious Considerations in the Selection of Patients with Hepatitis C for Total Joint Arthroplasty: Commentary on an article by Kimona Issa, MD, et al.: “The Impact of Hepatitis C on Short-Term Outcomes of Total Joint Arthroplasty” by Javidan, Pooya, Walker, Richard H

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No Difference in Blood Loss and Risk of Transfusion Between Patients Treated with One or Two Doses of Intravenous Tranexamic Acid After Simultaneous Bilateral TKA by Wilde, Jeffrey M., Copp, Steven N., Ezzet, Kace A., Rosen, Adam S., Walker, Richard H., McCauley, Julie C., Evans, Audree S., Bugbee, William D.

“…Tranexamic acid (TXA) is often used to prevent excessive blood loss during bilateral TKA. Although it diminishes blood loss, TXA may have a potentially…”
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Time marches on, but do the causal pathways driving instream habitat and biology remain consistent? by Walker, Richard H., Ashton, Matthew J., Cashman, Matthew J., Fanelli, Rosemary M., Krause, Kevin P., Noe, Gregory B., Maloney, Kelly O.

“…Stream ecosystems are complex networks of interacting terrestrial and aquatic drivers. To untangle these ecological networks, efforts evaluating the direct and…”
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A metasystem approach to designing environmental flows by Messager, Mathis L, Olden, Julian D, Tonkin, Jonathan D, Stubbington, Rachel, Rogosch, Jane S, Busch, Michelle H, Little, Chelsea J, Walters, Annika W, Atkinson, Carla L, Shanafield, Margaret, Yu, Songyan, Boersma, Kate S, Lytle, David A, Walker, Richard H, Burrows, Ryan M, Datry, Thibault

“…Abstract Accelerating the design and implementation of environmental flows (e-flows) is essential to curb the rapid, ongoing loss of freshwater biodiversity…”
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A Risk Factor Out of Control: Commentary on an article by Alon Ben-Ari, MD, et al.: “Preoperative Opioid Use Is Associated with Early Revision After Total Knee Arthroplasty. A Study of Male Patients Treated in the Veterans Affairs System” by Reich, Michael S., Walker, Richard H.

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Factors contributing to leaf decomposition vary with temperature in two montane rivers of the Intermountain West, Utah by Walker, Richard H., Orr, Michael C., Miller, Scott W.

“…Terrestrial organic matter (OM) is an essential energy source that fuels many food webs. The factors contributing to OM decomposition and the rate at which OM…”
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