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Statistical harmonization of versions of measures across studies using external data: Self-rated health and self-rated memory.
Ann Epidemiol
January 2025
University of California, Los Angeles Fielding School of Public Health Department of Epidemiology, Los Angeles, CA, USA. Electronic address:
Purpose: Harmonizing variables for constructs measured differently across studies is essential for comparing, combining, and generalizing results. We developed and fielded a brief survey to harmonize Likert and continuous versions of measures for two constructs, self-rated health and self-rated memory, for use in studies of French older adults.
Methods: We recruited 300 participants from a French memory clinic in 2023 to answer both the Likert and continuous versions of self-rated health and self-rated memory questions.
Dynamic treeline and cryosphere response to pronounced mid-Holocene climatic variability in the US Rocky Mountains.
Proc Natl Acad Sci U S A
January 2025
Department of Earth Sciences, Montana State University, Bozeman, MT 59717.
Climate-driven changes in high-elevation forest distribution and reductions in snow and ice cover have major implications for ecosystems and global water security. In the Greater Yellowstone Ecosystem of the Rocky Mountains (United States), recent melting of a high-elevation (3,091 m asl) ice patch exposed a mature stand of whitebark pine () trees, located ~180 m in elevation above modern treeline, that date to the mid-Holocene (c. 5,950 to 5,440 cal y BP).
View Article and Find Full Text PDFDoes persistent crossover (ipsilateral) motor evoked potential (MEP) responses represent a technical failure for intracranial motor tract monitoring? A case example and practical solution.
Acta Neurochir (Wien)
December 2024
Section of Neurosurgery Health Sciences Centre, GB 1 - 820 Sherbrook Street, Winnipeg, MB, R3A 1R9, Canada.
Article Synopsis
- Attention to the intensity of motor evoked potentials (MEPs) is crucial to avoid false negatives during intracranial surgeries; the presence of crossover MEP responses may misleadingly indicate excessive stimulation intensity.
- A case study involving a patient undergoing tumor resection illustrated that using MEP onset latencies helped accurately determine appropriate stimulation intensity, even when crossover responses occurred.
- The results indicated that using onset latency measurements effectively validated contralateral hand MEPs for reliable intraoperative monitoring, leading to a successful surgery without motor deficits.
Multifunctional Biocomposite Materials from Chlorella vulgaris Microalgae.
Adv Mater
January 2025
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA.
Extrusion 3D-printing of biopolymers and natural fiber-based biocomposites enables the fabrication of complex structures, ranging from implants' scaffolds to eco-friendly structural materials. However, conventional polymer extrusion requires high energy consumption to reduce viscosity, and natural fiber reinforcement often requires harsh chemical treatments to improve adhesion. We address these challenges by introducing a sustainable framework to fabricate natural biocomposites using Chlorella vulgaris microalgae as the matrix.
View Article and Find Full Text PDFMoving ecological tree-ring big data forwards: Limitations, data integration, and multidisciplinarity.
Sci Total Environ
December 2024
Plant Ecology, Institute of Integrative Biology, D-USYS, ETH Zürich, Zürich, Switzerland; Biology Dpt., University of Washington, Seattle, USA.
In recent years, tree-ring databases have emerged as a remarkable resource for ecological research, allowing us to address ecological questions at unprecedented temporal and spatial scales. However, concerns regarding big tree-ring data limitations and risks have also surfaced, leading to questions about their potential to be representative of long-term forest responses. Here, we highlight three paths of action to improve on tree-ring databases in ecology: 1) Implementing consistent bias analyses in large dendroecological databases and promoting community-driven data to address data limitations, 2) Encouraging the integration of tree-ring data with other ecological datasets, and 3) Promoting theory-driven, mechanistic dendroecological research.
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