Categories - Hydrosphere

Sub Categories

Topics

lagrangian-ocean-modelling, tracer, tides, rivers, fluvial-geomorphology, limnology, basins, tidy-data, topography, nhdplus, hydrodynamic-modeling, catchment, mohid, fluxes, meteorological-stations, inverse-model, marine-tracer, ocean-circulation, coops, currents, gstat, metocean, sensors-data, water-level, auv, geospatial-database, robots, birdhouse, pavics, physical-oceanography, basin-evolution, sedimentology, stratigraphy, onc, alkalinity-titrator, ocean-acidification, hydrologic-database, hydrologic-networks, hydrologic-sciences, hydroshare, irods, solr, hydrological-data-analysis, hydrology-statistical, channel-morphology, floodplain-reconnection, fluvial-process, hydraulic-geometry, river-engineering, watershed-assessment, hydrology-simulation, mHM, wave, current, velocity, beach, freshwater-atlas, linear-referencing, streams, pastas, greece, hydrometeorology, hydroscope, citz, hydrometrics, automatic-differentiation, gfd, meshes, shallow-water-equations, raven, shud, hydrogeophysics, mountain-features, nhdplus-data, river-runner, sci-viz, usgs-api, usgs-data, yellowstone-national-park, conceptual-hydrological-models, coast, hspexp, hspf, ipywidgets, neon, pace, generalized additive model, hydrograph, support vector machine, water level, flooding, openstreetmap-data, osm-data, river-network-analysis, topology, observations, data60uk, grdc, kgclimateclass, mopex, sepa, pcraster, rubem, adjoint, adjoint-sensitivities, seaice, tracers, coastal-change, coastal-dynamics, coastlines, dea, coastal-carbon-network, data-synthesis, wetland-science, passive-microwave, reflectivity, snowfall, trmm, kriging, potentiometer, boron, isotope, filters, iwrm, reservoirs, wrf-hydro, aquifer-parameters, recharge, centerline-detection, centerline-extraction, centreline, fluvial, google-earth, meandering-rivers, river-bank, river-bank-length, river-centerline, river-width, voronoi, eddies, eddy, extraction, oceanic-eddies, modflow6, faecal, estuary-earth-science, bathymetry, depth-estimation, eu-project, magicbathy, ocean-data, ocean-mapping, seabed-mapping, shallow-water, spot6, surface, alkalinity, seawater, titration, total-alkalinity, catalogue, knowledge-graph, rdf, contaminant-transport, ocean-model, ocean-navigator, wflow, wfs, land-surface, depth-to-watertable, geostatiscs, surfacehydrology, swb, leakage, geodesy, flopy, hydrometry, velocimetry, adcps, directional-spectrum, spotter, wavelets, waves, wavestaffs, wdm, chemistry-solver, co2sys, marine-chemistry, seawater-carbonate-chemistry, numerical-modeling, numerical-modelling, particle-routing, particle-tracing, particle-tracking, particle-transport, passive-tracers, ocean-circulation-models, tva, distributed, jax, multi-core, circulation, estuary, oil-spills, watershed-modeling, input-data, swat-model, landsat-5, landsat-9, shoreline-detection, depression-filling, flow-routing, terrain-analysis, unstructured-meshes, salishsea, salishseacast, ubc-moad, d8, hydrography, ldd, tide-modelling, tidesandcurrents, heatwaves, marine-heatwaves,

Projects

Contributors

Adam Korynta [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics:

zamusacelre [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics:

hoffmanjs [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics:

Andrew Gilmore [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: data-storage, oracle-database, water-resources

BrettPWRE [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: data-storage, oracle-database, water-resources

Daniel Osborne [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics:

Charles Graham [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: cdajs, cwms, hec, water-management

Hans Kim [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

CHIKHI Walid [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics:

Eli Ateljevich [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Qingfu Liu [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics:

Sajal.Kar [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics:

Zhang [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics: hec-dss, hec-ras, swig, time-series-database, water-resources

Benjamin Fersch [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: earth-science, hydrologic-modeling, hydrology, wrf-hydro

Aubrey Dugger [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: earth-science, hydrologic-modeling, hydrology, wrf-hydro

gautam.sood [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: earth-science, hydrologic-modeling, hydrology, wrf-hydro

Andy Gaydos [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: earth-science, hydrologic-modeling, hydrology, wrf-hydro

Ryan Cabell [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: earth-science, hydrologic-modeling, hydrology, wrf-hydro

TimLahmers [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: earth-science, hydrologic-modeling, hydrology, wrf-hydro

mauriel133 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr and 1 more

Devin Cowan [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

hyi [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

Alva Couch [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

zhiyuli [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

Michael J. Stealey [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr and 1 more

Brian Miles [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr and 14 more

xuezhaokun [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

Tony Castronova [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

Alex Lemann [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

shaunjl [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

Ilan Gray [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

Soumya [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

SarvaPulla [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr and 7 more

martinseul [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

bjgman12 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

edwmorgan [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydro, hydrologic-database, hydrologic-modeling, hydrologic-networks, hydrologic-sciences, hydrology, hydrology-stormwater-analysis, hydroshare, irods, solr

quai20 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: argo, argo-data, argo-floats, oceanography, software

tylertucker202 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: argo, argo-data, argo-floats, oceanography

Dewey Dunnington [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: citz, government-data, hydrology, hydrometrics, tidy-data, water-resources, visualisation, gdal, geos, proj and 5 more

rywhale [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: citz, government-data, hydrology, hydrometrics, tidy-data, water-resources, canada, environment-canada, geomet, msc and 3 more

Robert Chlumsky [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: citz, government-data, hydrology, hydrometrics, tidy-data, water-resources, delineation, lake, routing, watershed and 6 more

Ian Howson [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: basin-evolution, climate, geomorphology, geosciences, landscape-dynamics, marine, sedimentology, stratigraphy, basin, sediment-transport

mandi thran [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: basin-evolution, climate, geomorphology, geosciences, landscape-dynamics, marine, sedimentology, stratigraphy

lily-tomkovic-DWR [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

JamesMakela [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics: gtk, qt, tk, wx

Han Sang (Hans) Kim [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Eli [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Leo Geng [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

iferreir [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

rhoang [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

SRajagopal [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Kijin Nam [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

brentfraser [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Waves and Currents
Topics: current, ocean, velocity, visualisation, water, weather, wind, geomoose, ogc, ogc-services and 10 more

Myles McManus [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Waves and Currents
Topics: current, ocean, velocity, visualisation, water, weather, wind

Phil Krull [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Waves and Currents
Topics: current, ocean, velocity, visualisation, water, weather, wind

Luc Claustres [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Waves and Currents
Topics: current, ocean, velocity, visualisation, water, weather, wind, cycling, vector-tiles, asciigrid and 25 more

Pierre Vernier [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Waves and Currents
Topics: current, ocean, velocity, visualisation, water, weather, wind

Geoff Holden [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

Noah Gallant [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

Jeffrey Dawson [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

Doug Latornell [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

Clyde Clements [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

halehkh65 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

Ocean-Navigator [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: ocean-model, ocean-navigator, oceanography

shartgring [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydrodynamics, hydrological-modelling, hydrology, wflow

DirkEilander [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydrodynamics, hydrological-modelling, hydrology, wflow

Mark Hegnauer [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydrodynamics, hydrological-modelling, hydrology, wflow

limnoliver [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: ecology, geoscience, limnology, water-quality

Patricia A. Soranno [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: ecology, geoscience, limnology, water-quality

Luke Gregor [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Carbon and Temperature
Topics: carbon-dioxide, chemistry, chemistry-solver, co2sys, marine-chemistry, oceanography, seawater-carbonate-chemistry, alkalinity, carbon, vindta and 3 more

d-sandborn [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Carbon and Temperature
Topics: carbon-dioxide, chemistry, chemistry-solver, co2sys, marine-chemistry, oceanography, seawater-carbonate-chemistry

Greg Clunies [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: coops, currents, metocean, noaa, sensors-data, tides, water-level, weather-api, coastal-engineering, autocomplete and 3 more

Craig Harter [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: coops, currents, metocean, noaa, sensors-data, tides, water-level, weather-api

Jacob Shufro [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics: coops, currents, metocean, noaa, sensors-data, tides, water-level, weather-api, beaches, lovelace-ui and 1 more

francispoulin [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Jerry Ling [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean, project-assistant, project-management, science-research, setup-tool, simulations and 65 more

Elise Palethorpe [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean, hydro, phes

hennyg888 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Victoria Whitley [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Jean-Michel Campin [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Keaton J. Burns [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean, conformal-mapping, numerical-methods, closember, pde-solver, spectral-methods

Markus E [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Dhruv Bhagtani [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Xiaozhou Ruan [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

jmbeckers [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean, interpolation, nco, ocean-sciences, oceanography, dataanalysis and 17 more

Mukund Gupta [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate, climate-change, data-assimilation, fluid-dynamics, ocean

Steven Smith [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: ns-3, quic

Yu-Fen Huang [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: hydrology

Berend Weel [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: ansible, ewatercycle, hydrology, earth-observation, land-cover, land-use

Mauricio Cordeiro [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: gdal, rasterio

Mark Hadfield [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: grid, oceanography, roms

arezoorn [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: wrf-hydro

James L. Makela [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Caitlin O'Connor [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Naomi Wilkins [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Amy MacFadyen [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics:

Chris Barker [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Coastal and Reefs
Topics: numerical-modelling, science-research, cpython, cpython-extensions, cython

ashishtiwari2006 [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Freshwater and Hydrology
Topics: simulation-model, soil-water-balance

Karl Smith [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean and Hydrology Data Access
Topics:

Caroline Cardinale [email protected]

OST Projects: 1
Categories: Hydrosphere
Sub Categories: Ocean Circulation Models, Ocean Models
Topics: climate-modeling, numerical-modeling, numerical-modelling, ocean-circulation, ocean-circulation-models