Categories - Renewable Energy
Sub Categories
- Hydro Energy - 14 projects
- Bioenergy - 6 projects
- Wind Energy - 46 projects
- Geothermal Energy - 12 projects
- Photovoltaics and Solar Energy - 69 projects
Topics
geothermal, solar-cells, wind-turbines, pvoutput, wave-energy, balkonkraftwerk, amrex, rotorcraft, fault-detection, aeroelasticity, geothermal-energy, optics, process-simulation, raytracing, marine-renewable-energy, collision-risk, migratoryspecies, offshore-wind, seabirds, deye, inverter, sunsynk, bifacial, modelica-library, openmdao, aircraft, aerodynamics, potential-flow, scada, openfoam, wind-power, offshore-wind-platforms, boundary-element-method, exascale-computing, ecp, sungrow-inverter, modbus-sungrow, freeboard, slack, repair, aeroacoustics, vortex-methods, vpm, renogy-rover, vtol, crne-solar, outback-mate, renogy, packets, hut23-425, bioreactor, inverse-modelling, meshing, hoymiles, solenso, tsun, defects, electronic-structure, materials-design, semiconductors, scr-1551, aeronautics, structural-dynamics, structures, photovoltaics-dashboard, exawind, les, low-mach, hydropower-model, custom-cards, water-wave, mhkit, scr-2609, snl-visualization, dweet, reuse, compliance, low-carbon-systems, scr-1647, simulink, wec-sim, wind-farm, pv-simulator, shading-effects, cloud-motion-prediction, generative-models, photovoltaic-power, probabilistic-solar-forecasting, sky-images, stochastic-video-prediction, halide-ion-migration, perovskite-solar-cells, solax, non-governmental-organization, detection-boxes, detector-model, keras, model-detection, photovoltaic-panels, yolo3, heatexchanger, unsupervised-machine-learning, slack-bot, solarthing, solcast, chakra-ui, degradation, duramat, photovoltaic-systems, pv-modules, scr-2927, beam-irradiance, flight-simulation, sun-position, operations-maintenance, simpy, cheminformatics, density, equation-of-state, heat-capacity, molecule, solubility, surface-tension, thermal-conductivity, vapor-pressure, viscosity, circularity, circularity-metrics, lifetime, mass-flow, reactive-chemistry, simulation-modeling, soil-vapor, subsurface-hydrology, subsurface-remediation, solar-concentrating-systems, sofar, sol-ark, solarman, solis, biochemical-process, bioprocess, biorefinery, centrifuge, distillation, fermentation, flash, heat-exchanger, unit-operation, balkonpv, ecosystem-models, phenotyping, boundary-element, hydrodynamic-coefficients-viewer, mesh-processing, energy2d, finite-difference-time-domain, multiphysics, scr-2490, radiance, actuator-line, airfoils, blade-element, turbines, borehole-image-analysis, fracture, fracture-mechanics, fractures, mplstereonet, structural-geology, home-assistant-integration, huawei, huawei-solar, modbus-rtu, modbus-tcp, carbon-sequestration, coupled-heat-mass, multiphase-transport, nuclear-waste-repositories, porous-flow, fatigue-analysis, girder, gui-based, naval-architecture, plate-thickness, plates, structural-engineering, agroclimatology, agroclimatology-data, nasa-power, weather-variables, semiconductor, amr, ocean-wave-energy-converters, potential-flow-theory, wave-structure-interaction, deeplabv3, deepsolar, inception-v3, network-planning, neurips-2020, pv-systems, solar-panels, borefields, sizing, meshviewer, geothermal-reservoirs, golem, moose-framework, irradiance, ninja, bem, bemt, propeller, rotor, systems-engineering, wisdem, ray-tracing, rigorous-coupled-wave, transfer-matrix-method, ste, analysis-framework, beam-section, buckling, cylinders, design-of-offshore-steel-structures, dnv-os-c101, dnvgl-os-c101, dnvgl-rp-c201, dnvgl-rp-c203,
Projects
Contributors
Bonnie Jonkman [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
andrew-platt [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Mike Sprague [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Hannah Ross [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine, openfast, wind-turbine-simulation
Derek Slaughter [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Greg Hayman [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Jason Jonkman [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine, openfast, wind-turbine-simulation
LucidityCrash [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
octopus, octopus-agile, octopus-energy, deye, inverter, sofar, sol-ark, solar, solarman, solis and 1 more
Marshall Buhl [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Richard Crozier [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Michael Schmidt [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Rick Damiani [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Nicole Mendoza [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
hlong [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Kelsey Shaler [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Stein [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Lucas Carmo [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Michael Buehlmann [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amrex, atmospheric-modelling
Axel Huebl [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
accelerator-physics, particles, phase-space, topas, topas-mc, twiss, blt, llnl, parallel-computing, portability and 77 more
Nobuhiro Kusuno [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
robynnemurrayNREL [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
rymanderson [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
acoustics, aeroacoustics, aerodynamics, aircraft, cfd, computational-fluid-dynamics, rotorcraft, vortex-methods, vpm, vtol and 11 more
Matt Phillips [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Alvaro Gonzalez [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
Charilaos Mylonas [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
IAbda [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine
FX Coudert [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, wind, wind-energy, wind-farm, wind-power, wind-turbine, computational-fluid-dynamics, finite-element-methods, heat-transfer, structural-analysis and 12 more
cibinjoseph [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
acoustics, aeroacoustics, aerodynamics, aircraft, cfd, computational-fluid-dynamics, rotorcraft, vortex-methods, vpm, vtol and 3 more
Andrew Ning [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
David Goodman [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
crne-solar, outback-mate, packets, pvoutput, renogy, renogy-rover, slack, slack-bot, solar, solar-energy and 2 more
Biel Cardona [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
Taylor Parsons [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
George Scott [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
Peter [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
kevybear [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
Dave Pitts [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
photovoltaic, renewable-energy, renewables, solar-energy
minusfivethirds [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
allx [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
deye, inverter, sofar, sol-ark, solar, solarman, solis, sunsynk
mmoniot [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
Charles Coulombe [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
Ben Agricola [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
deye, inverter, sofar, sol-ark, solar, solarman, solis, sunsynk
Harald Funk [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
deye, inverter, sofar, sol-ark, solar, solarman, solis, sunsynk
Michael J. Brazell [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines
Michele Rosso [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines
Ganesh Vijayakumar [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines
Diederik Beckers [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines
Tommaso Toniolo [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
deye, inverter, sofar, sol-ark, solar, solarman, solis, sunsynk
Alex Rybchuk [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines
jbb [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines, adaptive-mesh-refinement, cfd, combustion, hydrodynamics and 8 more
yuya737 [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines, data-viz, mpi, parallel-computing, radiuss and 1 more
amralaa95 [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
olivia-bentley [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
Pratik Nayak [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, computational-science, fem, finite-elements, high-order, math-physics, parallel-computing, radiuss, dpcpp, hip and 8 more
Weiqun Zhang [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amrex, combustion, low-mach-number, accelerator, beam-dynamics, particle, particle-in-cell, physics, pic, research and 1 more
Vsevolod Volkov [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
custom-cards, deye, inverter, powerflow, solar, sunsynk
maybetaken [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
custom-cards, deye, inverter, powerflow, solar, sunsynk
rmorenoramos [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
aeroelasticity, aeronautics, structural-dynamics, structures, wind-turbines
Nick Thrower [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Bioenergy
Topics:
activerecord, audit
Benjamin Vial [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
multiscale-simulation, optics, physics, ray-tracing, raytracing, rigorous-coupled-wave, solar-cells, transfer-matrix-method, Finite Element Method, electromagnetism and 1 more
Muhammad Syazwan Bin Ahmad [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
Jakob Harzer [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
Shivam Vashisth [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
cjbasp22 [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Hydro Energy
Topics:
hydropower, hydropower-model, techno-economic-analysis
Juan F. Gallego-Calderon [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Hydro Energy
Topics:
hydropower, hydropower-model, techno-economic-analysis
Juan F. Gallego Calderon [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Hydro Energy
Topics:
hydropower, hydropower-model, techno-economic-analysis
Sergiu Deitsch [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
asciidoctor, assembly, build, build-system, build-systems, build-tool, build-tools, cplusplus, docbook, dolphin and 7 more
Joel Ekström [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
photovoltaic, solar, solax
Axel Hinrichs [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Bernhard Kirchen [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Stefan Oberhumer [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Nikolaj Kappler [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Marc-Philip [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Michael Wilk [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Luca Kröger [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
jstammi [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Timo Schindler [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Stefan Kreutter [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
helgeerbe [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
David Salinas [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
amr, amrex, ecp, exascale-computing, wind, wind-turbines
Dominic Michel [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
nexulm [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
DirkS [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
CSchoch [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Simon Schwarz [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Rene [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Markus Dobel [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Tobias Diedrich [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Stefan Seifert [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Hacks [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
balkonkraftwerk, esp32, hoymiles, platformio, solar, solenso, tsun
Luigi [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
photovoltaic, semiconductor, solar-cells, hut23, hut23-222, data-mining, time-series-classification, time-series-regression, conda, dependencies and 25 more
Alex Zorkin [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Bioenergy
Topics:
compliance, dds, low-carbon-systems
Liao [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Wind Energy
Topics:
openmdao, systems-engineering, wind, wisdem
Herbrax [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
AidanWesley [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
degradation, duramat, photovoltaic-systems, pv-modules, reliability
Brown [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
degradation, duramat, photovoltaic-systems, pv-modules, reliability
yhkee0404 [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
photovoltaic, renewable-energy, renewables, solar-energy
cclintris [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics:
Chengcheng Ding [email protected]
OST Projects: 1
Categories: Renewable Energy
Sub Categories: Photovoltaics and Solar Energy
Topics: