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118 results for “physical change”
Dataset on Physics-Based Indicators for Optimizing Phase Change Material Effectiveness in Building Design
<p>This research dataset includes the results as well as the EnrgyPlus models developed to investigate and validate newly proposed indicators to quantify the effectiveness of phase change materials in buildings.</p>
The interaction of physical structure and nutrient loading drives ecosystem change in a large tropical lake over 40 years (DATA)
<p><strong><span>Datasets for manuscript entitled "The interaction of physical structure and nutrient loading drives ecosystem change in a large tropical lake over 40 years"</span></strong></p> <p><em><span>Includes data collected by Fadum and Hall as well as unplublished data from Vaux and Goldman 1984.</span></em></p> <p><span><strong>Abstract: </strong>Many lakes across the world are entering novel states and experiencing altered biogeochemical cycling due to local anthropogenic stressors. In the tropics, understanding the drivers of these changes can be difficult due to a lack of documented historic conditions or an absence of continuous monitoring that can distinguish between intra- and inter-annual variation. Over the last forty years (1980–2020), Lake Yojoa (Honduras) has experienced increased watershed development as well as the introduction of a large net-pen Tilapia farm, resulting in a dramatic reduction in seasonal water clarity, increased trophic state and altered nutrient dynamics, shifting Lake Yojoa from an oligotrophic (low productivity) to mesotrophic (moderate productivity) ecosystem. To assess the changes that have occurred in Lake Yojoa as well as putative drivers for those changes, we compared Secchi depth (water clarity), dissolved inorganic nitrogen (DIN), and total phosphorus (TP) concentrations at continuous semi-monthly intervals for the three years between 1979 and 1983 and again at continuous 16-day intervals for 2018–2020. Between those two periods we observed the loss of a clear water phase that previously occurred in the months when the water column was fully mixed. Seasonal peaks in DIN coincident with mixing suggest that an enhanced accumulation of ammonium in the hypolimnion (the bottom layer of a stratified lake) during stratification, and release to the epilimnion (the top layer of a stratified lake) with mixing maintains high algal abundance and subsequently low Secchi depth during what was previously the clear water phase. This interaction of nutrient loading and Lake Yojoa's monomictic stratification regime illustrates a key phenomenon in how physical water column structure and nutrients interact in tropical monomictic lakes. This work highlights the need to consider nutrient dynamics of warm anoxic hypolimnions, not just surface water nutrient concentrations, to understand environmental change in these societally important but understudied ecosystems.</span></p> <p> </p> <p><em><strong><span>(for more recent years of data collection see additional zenodo repositories by Fadum and/or Hall) </span></strong></em></p>
Figure 2 in Changes in galling insect community on Caryocar brasiliense trees mediated by soil chemical and physical attributes
Figure 2. Principal components regressions among: (A) Eurytoma sp. galling insect adults (Eur.) with phosphorus-Mehlich 1 (mg dm-3) contents (P.C.) and silt (dag kg-1) (Si.); (B) numbers of Eurytoma sp. glodoid galls (E.G.G.) with pH in water, capacity of cationic exchange (cmol dm-3) (C.C.E.), and P.C.; (C) area (mm2) of Eurytoma sp. glodoid galls (A.E.G.) with pH and clay (dag kg-1) (Cl.); (D) c length of conglomerate of Eurytoma sp. globoid galls (L.G.E.) with pH and Cl.; (E) width of conglomerate of Eurytoma sp. globoid galls (W.G.E.) with pH and Cl.; and (F) number of Hymenopteran discoid galls (H.D.G.) with aluminum (cmol dm-3) contents (A.C.), C.C.E., c and percentage of soil base saturation of the capacity of cationic exchange to pH 7.0 (S.B.S.) on Caryocar brasiliense trees in three years. The symbols represent the averages and the bars the standard errors. n = 111.
Figure 1 in Changes in galling insect community on Caryocar brasiliense trees mediated by soil chemical and physical attributes
Figure 1. Principal components regressions among: (A) abundance of galling insects (A.G.I.) with phosphorus-Mehlich 1 (mg dm-3) contents (P.C.) and sand (dag kg-1) (Sa.); (B) species richness of galling insects (S.R.G.I.) with capacity of cationic exchange (cmol dm-3) c (C.C.E.); (C) diversity of galling insects (D.G.I.) with C.C.E. and Sa.; (D) percentage of galled leaflet by all galls (P.G.L.) with pH in water and clay (dag kg-1) (Cl.); and (E) percentage of leaflet area taken by all galls (P.L.A.G.) with aluminum (cmol dm-3) contents (A.C.) and c C.C.E. on Caryocar brasiliense trees in three years. The symbols represent the averages and the bars the standard errors. n = 111.
Figure 4 in Changes in galling insect community on Caryocar brasiliense trees mediated by soil chemical and physical attributes
Figure 4. Principal components regressions among: (A) abundance of predators (A.Pr.) with phosphorus-Mehlich 1 (mg dm-3) contents (P.C.) and clay (dag kg-1) (Cl.); (B) species richness of predators (S.R.Pr.) with number of Hymenoptera discoid galls (H.D.G.), species richness of parasitoids (S.R.P.), and Cl.; (C) diversity of predators (D.Pr.) with diversity of parasitoids (D.P.) and Cl.; (D) number of Zelus armillatus (Zar.) with P.C., percentage of soil base saturation of the capacity of cationic exchange to pH 7.0 (S.B.S.), silt (dag kg-1) (Si.), numbers of Eurytoma sp. glodoid galls (E.G.G.), and capacity of cationic exchange (cmol dm-3) (C.C.E.); (E) number of Epipolops sp. (Epi.) c with protocooperanting ants (Ants), Cl., and pH in water; and (F) number of spiders (Spi.) with Ants, P.C., and Si. on Caryocar brasiliense trees in three years. The symbols represent the averages and the bars the standard errors. n = 111.
Dataset for the intervention effects and long-term changes in physical activity and cardiometabolic outcomes among children at risk of noncommunicable diseases in South Africa
<p>Dataset used to evaluate the short-term effects of the physical and health <em>KaziKidz</em> intervention on cardiometabolic risk factors and the long-term changes thereof among school-aged children at risk of NCDs from disadvantaged communities in South Africa.</p> <p>It encompasses anonymized, unique, identification numbers, anthropometric and clinical measures, such as blood pressure, blood sugar and blood lipids, and Actigraphy-measured physical activity levels. Assigned categories to each cardiovascular risk factor and the overall classification as at risk or not is available too.</p>
Behavior Change Techniques (BCTs) to Improve Low Intensity Physical Activity in Older Adults
ClinicalTrials.gov study NCT04967313. IPD Sharing: YES. Countries: 1. Publications: 1.
Extended data for behavioural change for Parkinson's disease: A randomised controlled feasibility study to promote physical activity and exercise adherence among people with Parkinson's, study protocol
<p><strong>Background: </strong>Parkinson's is a common progressive neurological condition characterized by motor and non-motor deficits. Physical activity and exercise can improve health, but many people with Parkinson's have trouble reaching the recommended dosage. Our recent literature review found improvements in exercise adherence with behavioural change interventions, but it remains unclear which are most effective. Further qualitative research and patient and public involvement has informed a novel behavioural change support intervention to be tested alongside an existing exercise program.<strong> </strong></p> <p><strong>Objective: </strong>To examine the feasibility of behavioural change support techniques delivered alongside an exercise programme to improve physical activity, function, and self-efficacy in PwP (and study procedures) to inform a future pilot RCT trial.<strong> </strong></p> <p><strong>Methods: </strong>A parallel-arm single blinded randomised feasibility study. Twenty participants with Parkinson's (Hoehn and Yahr stage 1-3) will be recruited from a physiotherapy primary-care waiting list. Following written consent, and baseline assessment, the participants will be randomly allocated to the intervention (n=10) or the control group (n=10). Both groups will receive usual care, which includes a weekly program of a multidisciplinary education, a supervised exercise class and a prescribed home exercise program. The intervention group will receive additional behavioural change techniques, targeting behaviour regulation, belief about capabilities and social influences. Class and home exercise adherence, behavioural component uptake and adherence, and negative events will be recorded. Outcomes will include enrolment and maintenance rates, physical function, falls, physical activity, and exercise self-efficacy measured pre- and post- the 12- week program (in-person). Surveys will be used to compare experiences and satisfaction between groups. Exit interviews will be completed with the intervention group only, exploring their experience of the behavioural change techniques. </p> <p><strong>Discussion: </strong>The results will help inform a future pilot RCT, based on the intervention acceptability, consent rate, maintenance, and protocol integrity.</p>
Global Urban Activity Changes from COVID-19 Physical Distancing Restrictions Dataset: TRacking Anomalous COVID-19 induced changEs in NightTime Lights (TRACE-NTL)
<p>We use satellite-derived (NASA Black Marble) nighttime lights to identify, quantify, and map daily changes in human activity that are atypical for each urban area, globally, from the beginning of the pandemic until two years after its onset. The dataset TRACE-NTL consists of global daily urban disruption and recovery metrics as a response to COVID-19.</p> <p>TRACE-NTL:</p> <p>├───ancillary<br>├───data<br>└───metrics<br> ├───disruption<br> │ ├───change_segment<br> │ ├───city_uncertainty<br> │ ├───daily_change<br> │ └───daily_qa_flags<br> └───recovery</p> <p><a title="Dataset description" href="https://github.com/srijac/covid-19_Nightlights">https://github.com/srijac/covid-19_Nightlights</a></p> <p>Accompanying paper: Accompanying paper: Chakraborty, S., Stokes, E.C. & Alexander, O. Global urban activity changes from COVID-19 physical distancing restrictions. <em>Sci Data</em> <strong>12</strong>, 98 (2025). https://doi.org/10.1038/s41597-025-04398-x </p>
The Physics of Changing Tectonic Regimes: Implications for the Temporal Evolution of Mantle Convection and the Thermal History of Venus
<p>Input and relevant data files for "The Physics of Changing Tectonic Regimes: Implications for the Temporal Evolution of Mantle Convection and the Thermal History of Venus." Each data set was used to generate figures in text, and was used with, or obtained from, CitcomS (v3.3).</p> <p> </p> <p>diagnostic.dat contains internal metrics [#step time Mobility Tint T_asthen_avg D U Uc RMS_Velocity]<br> Where #step is iteration number, time is the non dimensional diffusion time scale for the step, Mobility is defined in text, Tint is the mid mantle temperature (average), T_asthen_avg is the upper mantle temperature (average), D U Uc not used, and RMS_Velocity is the root mean square velocity.</p> <p> </p> <p>Nusselt.dat contains heat flow information [time, surface nusselt number, basal nusselt number].</p> <p>Time is the non dimensional diffusion time scale for the step. nusselt numbers are nondimesional heatflow from the surface (lithosphere) and base (core).<br> </p> <p>Melt2.dat contains melting information. #step is iteration number, time is the non dimensional diffusion time scale for the step,</p> <p>non-dimensional melt</p> <p> </p> <p>the input.* file is the model input file used with CitcomS (v3.3) that includes all parameters used for the reference case. Variations from this file are described in text.</p>
Dataset: Recruitment of pioneer trees with physically dormant seeds under climate change conditions: the case of Vachellia pennatula (Fabaceae) in semiarid environments of Mexico
<p>This repository contains the files associated with the following article:</p> <p>Sandoval-Martínez J, JA Flores-Cano and EI Badano. Recruitment of pioneer trees with physically dormant seeds under climate change conditions: the case of <em>Vachellia pennatula</em> (Fabaceae) in semiarid environments of Mexico. <em>Journal of Plant Research</em>, 135, pp. 453-463. <a href="https://doi.org/10.1007/s10265-022-01383-y">https://doi.org/10.1007/s10265-022-01383-y</a></p> <p>The first Microsoft Excel file contains six sheets with the microclimatic data (photosynthetic photon flux density, air temperature, relative humidity, soil temperature, rainfall and soil moisture) measured at controls under the current climate and climate change simulation plots located at each experimental site (Rio Bagres and Cañada Grande). The second Microsoft Excel file contains a single sheet with the data used to estimate the seedling emergence and survival rates from scarified and unscarified seeds of <em>Vachellia pennatula</em> in controls and climate change simulation plots at each experimental site (Rio Bagres and Cañada Grande).</p>
Studying Changes in Physical Function Measures in Stem Cell Transplant Patients at Risk for Steroid Myopathy
ClinicalTrials.gov study NCT04521777. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Behavioral Change Communication (BCC) to Promote Physical Activity Among Females With Type 2 Diabetes Mellitus Attending Diabetic Clinic
ClinicalTrials.gov study NCT00690326. IPD Sharing: Not stated. Countries: 1. Publications: 0.
The Utilization of Yoga as a Therapeutic Tool to Promote Physical Activity Behavior Change and Improved Postural Control in Individuals With Multiple Sclerosis
ClinicalTrials.gov study NCT04113135. IPD Sharing: YES. Countries: 1. Publications: 34.
Physical Activity Behavior Change for Older Adults After Dysvascular Amputation
ClinicalTrials.gov study NCT02738086. IPD Sharing: NO. Countries: 1. Publications: 1.
Testing Self-Control as a Behavior Change Mechanism to Increase Physical Activity
ClinicalTrials.gov study NCT04522141. IPD Sharing: NO. Countries: 1. Publications: 2.
Extended data for behavioural change for Parkinson’s disease: A randomised controlled feasibility study to promote physical activity and exercise adherence among people with Parkinson’s, study protocol
Open the record for dataset details and reuse information.
Data from: Naturally-occurring changes in social-cognitive factors modify change in physical activity during early adolescence
Purpose. To determine whether naturally-occurring changes in children's motives and beliefs are associated with the steep decline in physical activity observed from childhood to early adolescence. Methods. Latent growth modeling was applied in longitudinal tests of social-cognitive influences, and their interactions, on physical activity in a large cohort of boys and girls evaluated annually between 5th and 7th grades. Results. Measurement equivalence of motives and beliefs was confirmed between boys and girls. After adjustment for gender and maturity differences, physical activity declined less in children who reported the least decreases in self-efficacy for overcoming barriers to activity and perceived parental support. Physical activity also declined less in students who persistently felt they had more parental and friend support for activity compared to those who reported the largest decrease in support from friends. After further adjustment for race, the decline in physical activity was less in those who had the largest decrease in perceived barriers and maintained a favorable perception of their neighborhood environment. Changes in enjoyment and social motives were unrelated to change in physical activity. Conclusion. Using an objective measure of physical activity, we confirm that naturally-occurring changes in children's beliefs about barriers to physical activity and their ability to overcome them, as well as perceptions of their neighborhood environment and social support, are concurrent with age-related declines in children's physical activity. The longitudinal findings confirm these putative social-cognitive mediators as plausible, interacting targets of interventions designed to mitigate the marked decline in physical activity that occurs during the transition between elementary and middle schools.
Association of physical activity and APOE genotype with longitudinal cognitive change in early PD
<p><b>Objective:</b> To determine whether greater physical activity could modify the negative association of <i>APOE</i> <span>ε4 with longitudinal cognitive changes in early Parkinson's disease (PD) and to uncover the disease-specific mechanism for </span>explaining such benefits of physical activity<span>.</span></p> <p><b>Methods:</b> We used data from the Parkinson's Progression Markers Initiative cohort. Because self-reported physical activity, measured by the Physical Activity Scale of the Elderly, was initiated at 2 years after enrollment, this longitudinal analysis was based on assessments performed at years 2, 3, and 4. Cognitive function was measured annually with the Montreal Cognitive Assessment (MoCA). Dopamine transporter (DAT) imaging was performed at years 2 and 4. We assessed the interactive associations between physical activity and the <i>APOE</i> ε4 allele on the longitudinal changes in MoCA scores and striatal DAT activities.</p> <p><b>Results:</b> A total of 173 early PD patients (age 63.3±10.0 years; 27% <i>APOE</i> ε4 <span>carriers</span>) were included. The <i>APOE</i> ε4 allele showed a steeper rate of cognitive decline than the non-<i>APOE</i> ε4 allele (estimate -1.33; 95% CI, -2.12 to -0.47; <i>p</i>=0.002). However, there was a significant interaction between physical activity and <i>APOE</i> ε4, such that higher physical activity was related to slower <i>APOE</i> ε4-related cognitive decline (estimate 0.007; 95% CI, 0.003 to 0.011; <i>p</i>=0.001). No<span> significant interaction was found between physical activity and the <i>APOE</i> ε4 allele regarding the change in striatal DAT activities.</span></p> <p><span><span><b>Conclusion:</b> Increased physical activity attenuated <i>APOE</i> ε<span>4</span>-related vulnerability to early cognitive decline in PD patients. T<span>his protective effect did not appear to be mediated by striatal dopaminergic function.</span></span></span></p> <p><span><span><b>Classification of evidence</b>: This study provides Class II evidence that increased physical activity was associated with decreased <i>APOE</i> ε4-related early cognitive decline in PD patients.</span></span></p>
Data from: Behaviour changes techniques that constitute effective planning interventions to improve physical activity and diet behaviour for people with chronic conditions: a systematic review
<p><span>Objectives: Action planning is a brief and effective behaviour change technique (BCT) to improve physical activity (PA) and diet behaviour (DB).</span><span> This study</span><span> aimed to identify critical BCTs and </span><span>mechanisms of action</span><span> (MoA) to interpret the effectiveness of planning interventions based on the health action process approach (HAPA) model.</span></p> <p><span>Design: Systematic review</span></p> <p><span>Data Sources: PubMed, Web of Science, CIHNAL (EBSCO), PsycInfo (EBSCO), Psychology and Behavioural Sciences Collection (EBSCO), psyARTICLES, and Medline were searched for studies from January 1990 to September 2021 published in English.</span></p> <p><span>Eligibility Criteria: Experiment involving action planning intervention to improve PA or DB in community-dwelling adult patients with chronic conditions.</span></p> <p><span>Data extraction and synthesis: Two reviewers independently coded the planning interventions into BCT combinations and MoA </span><span>assemblies</span><span>. Outcome was dichotomized according </span><span>to </span><span>the statistical power and Cohen's d. The Cochrane risk of bias assessment tool and the Risk of Bias in </span><span>Nonrandomized</span><span> Studies of Intervention assessment tool were used to assess the quality of RCTs and non-RCTs</span><span>, respectively</span><span>.</span></p> <p><span>Results: From the 52 included studies, 46 BCTs were identified and linked to 21 MoAs. Long-term facilitators for planning intervention </span><span>included 'self</span><span>-monitoring of behaviour', 'problem solving', 'instruction on how to perform the behaviour', and 'goal setting (behaviour)'. The most frequently occurring MoA was "beliefs about capabilities". </span><span>The</span><span> effective intervention groups had higher MoA scores that corresponded to the HAPA </span><span>model</span><span> constructs than </span><span>the </span><span>ineffective groups.</span></p> <p><span>Conclusions:</span><span> The findings</span><span> from this review may inform scientific and effective planning intervention designs for community-dwelling people with chronic conditions in the future.</span></p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.