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Physical phenomena (S)
     Related Term (Associative): Physics (Tpx)
    Laws of physics (Sa)
         Use For: Physical laws
        Boussinesq equation (Sab)
        Conservation of mass and energy (Sag)
        Conservation of momentum (Sak)
        Equations of motion (Sal)
        Darcy's law (Sam)
        Froude number (Sao)
        Newton's law of gravitation (Sap)
        Newton's equations of motion (Saq)
             Use For: Newton's laws of motion
        Reynolds number (Sav)
             Related Term (Associative): Turbulent boundary layer (Srbt)
        Terzaghi's rule (Saw)
             Use For: Terzaghi consolidation theory
        Wave equations (Say)
    Sound (Sb)
         Use For: Sound waves
         Related Term (Associative): Acoustics (Tpxc)
        Acoustic emission (Sbb)
        Acoustic scattering (Sbf)
        Acoustic waves (Sbh)
            Aerodynamic noise (Sbhd)
                Sonic boom (Sbhds)
            Acoustic radiation (Sbhr)
                Far field (Sbhrf)
                     Use For: Fraunhofer region
                Near field (Sbhrn)
        Directivity pattern (Sbi)
        Effective sound pressure (Sbj)
             Use For: Sound pressure
            Sound level (Sbjs)
                 Use For: Noise parameters
        Harmonics (Sbm)
        Infrasound (Sbp)
             Use For: Infrasonic noise
        Pitch (Acoustics) (Sbr)
        Sound attenuation (Sbt)
             Use For: Acoustic attenuation
            Sound absorption (Sbts)
                 Use For: Acoustic absorption
        Sound transmission (Sbv)
             Use For: Noise propagation; Noise transmission; Sound propagation
            Reverberation (Sbvr)
            Sound intensity (Sbvs)
        Speed of sound (Sbw)
             Use For: Acoustic velocity
        Ultrasonic waves (Sbx)
            Ultrasonic radiation (Sbxr)
        Underwater sound (Sby)
    Chemical reactions and processes (Sc)
        Chemical reactions (Scc)
             Use For: Reactions (Chemistry)
            Catalysis (Scca)
            Combination (Chemistry) (Sccb)
            Detonation (Sccc)
            Explosions (Sccd)
            Fermentation (Scce)
            Hydration (Sccf)
            Hydrogenation (Sccg)
                Coal hydrogenation (Sccgb)
                     Use For: Bergius process
            Hydrolysis (Scch)
            Ion exchange (Scci)
                Cation exchange (Sccic)
            Neutralization (Sccj)
            Oxidation (Sccm)
                Combustion (Sccmc)
                     Use For: Fuel combustion
                     Related Term (Associative): ; 
                    Fluidized bed combustion (Sccmcf)
                    Manifestations of combustion (Sccmcy)
                        Fire (Sccmcyf)
                        Flames (Sccmcyh)
                            Flame propagation (Sccmcyhf)
            Photochemical reactions (Sccn)
            Polymerization (Sccp)
                 Use For: Polymerisation
            Reduction (Chemistry) (Sccr)
            Replacement (Chemistry) (Sccs)
            Synthesis (Chemistry) (Scct)
            Vulcanization (Sccv)
            Reactions in asphalt (Sccw)
                Asphalt hardening (Sccwb)
            Reactions in concrete (Sccy)
                Air entrainment (Sccya)
                Alkali aggregate reactions (Sccyb)
                     Use For: Cement aggregate reactions
                Alkali carbonate reactions (Sccyc)
                Alkali silica reactions (Sccye)
                Concrete hardening (Sccyh)
                Pozzolanic action (Sccyp)
                Scaling (Concrete) (Sccyr)
                Setting (Concrete) (Sccys)
        Chemical processes (Scp)
             Related Term (Associative): Fuel processing (Jnrrf)
            Activation (Chemistry) (Scpa)
            Aggregation (Chemistry) (Scpb)
            Association (Chemistry) (Scpc)
            Carbonation (Scpd)
                 Related Term (Associative): 
            Carbonization (Scpe)
            Chemical bond (Scpf)
                 Use For: Bond (Chemistry)
            Chlorination (Scpg)
                 Use For: Chloridization
            Corrosion (Scph)
                 Use For: Chemical attack
                 Related Term (Associative): ; Deterioration (Pte)
                Cavitation erosion (Scphb)
                     Use For: Cavitation corrosion
                Electrochemical corrosion (Scphe)
                     Use For: Electrolytic corrosion
                    Stray current corrosion (Scphes)
                Fretting corrosion (Scphf)
                Galvanic corrosion (Scphg)
                Pitting (Scphp)
                     Use For: Pitting corrosion
                Rusting (Scphr)
                Shelling (Metals) (Scphv)
                Stress corrosion (Scphx)
            Crystallization (Scpi)
                 Use For: Crystallisation
                Nucleation (Scpin)
            Decomposition (Scpj)
            Desulfurization (Scpk)
                 Use For: Desulphurization
            Dilution (Scpl)
            Dissociation (Chemistry) (Scpm)
            Dissolution (Scpn)
                 Use For: Dissolving
                Leaching (Scpnm)
            Distillation (Scpo)
            Electrochemical processes (Scpp)
                Anodic polarization (Scppb)
                Electrolysis (Scppm)
                Electroosmosis (Scppp)
            Gasification (Scpq)
            Ignition (Scpr)
            Ionization (Scps)
            Isolation (Chemistry) (Scpt)
            Osmosis (Scpu)
            Photolysis (Scpv)
            Precipitation (Chemistry) (Scpw)
                Coagulation (Scpwc)
            Pyrolysis (Scpx)
            Solvation (Scpy)
    Electricity (Se)
         Related Term (Associative): Electrical equipment (Qtbc)
        Accelerating potential (Sea)
        Attenuation (Electricity) (Seb)
        Conduction (See)
        Electric current (Seg)
            Alternating current (Segb)
            Direct current (Segd)
            Eddy currents (Segg)
            Short circuits (Segr)
            Stray currents (Segs)
        Electric discharge (Sej)
            Electric arcs (Seje)
            Sparks (Sejs)
        Electric fields (Sem)
        Electric potential (Sep)
             Use For: Potential (Electricity)
            Voltage (Sepv)
                 Use For: Electromotive force
                High voltage (Sepvh)
                Low voltage (Sepvm)
                     Use For: Undervoltage
                Overvoltage (Sepvp)
        Electric power (Seq)
            Power loss (Seql)
            Power output (Seqo)
        Electrostatics (Ser)
             Use For: Static electricity
        Intensity (Electricity) (Set)
        Phase shift (Electricity) (Seu)
        Piezoelectricity (Sev)
            Voltage regulation (Sevv)
        Resistance (Electricity) (Sew)
             Use For: Electrical resistance
            Dynamic resistance (Sewd)
        Resonance (Sex)
            Resonance frequency (Sexf)
                 Use For: Resonant frequency
                Natural frequency (Sexfn)
        Wall effect (Sey)
    Electromagnetism (Sf)
         Related Term (Associative): Electromagnetic devices (Qtbf)
        Electromagnetic fields (Sff)
             Use For: Magnetic fields
            Photons (Sffp)
        Electromagnetic induction (Sfj)
             Use For: Induction
        Electromagnetic radiation (Sfr)
             Use For: Radiation
            Electromagnetic waves (Sfrw)
                 Related Term (Associative): Waves (Smw)
                Electromagnetic waves by wavelength (Sfrwa)
                    Sound (Sfrwaa)
                    Radio waves (Sfrwab)
                    Microwaves (Sfrwaf)
                    Millimeter waves (Sfrwah)
                         Use For: Millimetre waves; Millimetric waves
                    Infrared radiation (Sfrwaj)
                    Light (Sfrwam)
                         Related Term (Associative): Optics (Tpxv)
                    Ultraviolet light (Sfrwap)
                    X rays (Sfrwas)
                    Gamma rays (Sfrwav)
                    Cosmic rays (Sfrway)
                Electromagnetic wave phenomena (Sfrwb)
                    Electromagnetic wave propagation (Sfrwbb)
                        Radio wave propagation (Sfrwbbr)
                    Diffraction (Sfrwbd)
                    Doppler effect (Sfrwbe)
                        Doppler shift (Sfrwbed)
                    Frequency (Electromagnetism) (Sfrwbf)
                         Use For: Frequencies
                        Audio frequency (Sfrwbfm)
                             Use For: Sonic frequency; Sound frequency
                            Voice frequency (Sfrwbfmv)
                        Radio frequency (Sfrwbfr)
                             Related Term (Associative): Transmission (Dsm)
                            Broadband (Sfrwbfrb)
                            Very low frequency (Sfrwbfrc)
                                 Use For: VLF
                            Low frequency (Sfrwbfrg)
                            Medium frequency (Sfrwbfrh)
                            High frequency (Sfrwbfrj)
                            Very high frequency (Sfrwbfrm)
                                 Use For: VHF
                            Ultrahigh frequency (Sfrwbfrs)
                                 Use For: UHF
                                L band (Sfrwbfrsm)
                                S band (Sfrwbfrss)
                            Superhigh frequency (Sfrwbfrw)
                                 Use For: SHF
                                Ku band (Sfrwbfrwk)
                    Polarization (Sfrwbp)
                        Pulses (Sfrwbpg)
                    Radiation patterns (Sfrwbq)
                         Use For: Antenna patterns
                        Frequency spectra (Sfrwbqs)
                    Reflection (Sfrwbr)
                        Radar reflection (Sfrwbrr)
                            Radar cross section (Sfrwbrrr)
                                 Use For: Echo area
                        Retroreflection (Sfrwbrt)
                    Refraction (Sfrwbs)
                    Scattering (Sfrwbt)
                         Use For: Electromagnetic scattering
                        Backscattering (Sfrwbtb)
                Electromagnetic wave properties (Sfrws)
                    Amplitude (Physics) (Sfrwsb)
                    Power spectra (Sfrwsp)
                         Use For: Power spectral density; Spectral density; Spectral energy distribution
                    Wavelength (Sfrwsw)
        Electromagnetic spectrum (Sfv)
             Use For: Spectra; Spectrum; Wave spectra
        Particle beams (Sfx)
             Use For: Beams (Radiation); Rays (Physics)
            Electron beams (Sfxe)
            Laser beams (Sfxm)
            Radio beams (Sfxr)
                Radar beams (Sfxrr)
            X rays (Sfxx)
                X ray fluorescence (Sfxxr)
                     Use For: X ray emissions
    Mechanics (Sm)
         Use For: Mechanical behavior; Statics and dynamics
        Attenuation (Physics) (Sma)
        Deformation (Smb)
             Related Term (Associative): Defects (Ptq)
            Bending (Smbb)
                Bending moments (Smbbm)
                Bending stress (Smbbs)
                     Use For: Flexural stresses
            Buckling (Smbc)
                Blowup (Pavements) (Smbcb)
                     Use For: Heaving (Pavements)
            Creep (Smbe)
                 Related Term (Associative): 
                Relaxation (Mechanics) (Smber)
                     Use For: Creep recovery; Stress relaxation
            Distortion (Structures) (Smbj)
            Elastic deformation (Smbk)
                Aeroelasticity (Smbkb)
                     Related Term (Associative): Flutter (Aeronautics) (Qdbdj); Flutter (Aeronautics) (Smdvf)
                Cratering (Smbkc)
                Deflection (Smbkg)
            Flexure (Smbm)
            Plastic deformation (Smbp)
                 Use For: Yield (Mechanics); Yield surface
            Plastic flow (Smbq)
            Rutting (Smbr)
                 Related Term (Associative): Ruts (Pavements) (Pmrcpppmbyr)
                Corrugations (Defects) (Smbrc)
            Strain (Mechanics) (Smbs)
                Shear strain (Smbss)
                     Use For: Direct shear
            Tension (Smbv)
                 Use For: Tensile loading; Tensile strain
            Torsion (Smbw)
                 Use For: Torsional stress; Twisting stress
                 Related Term (Associative): ; 
            Warpage (Smbx)
        Degrees of freedom (Smc)
            Constraints (Smcc)
        Dynamics (Smd)
            Fluid dynamics (Smdf)
                 Use For: Computational fluid dynamics
                Aerodynamics (Smdfb)
                    Downwash (Smdfbd)
                         Use For: Downdrag force
                    Shock (Mechanics) (Smdfbs)
                        Shock waves (Smdfbss)
                            Bow waves (Smdfbssb)
                Cavitation (Mechanics) (Smdfc)
                Drag (Smdfd)
                     Use For: Aerodynamic drag
                    Air resistance (Smdfdb)
                    Sound barrier (Smdfds)
                         Use For: Sonic barrier
                    Wave drag (Smdfdw)
                Flow (Smdff)
                     Related Term (Associative): Traffic flow (Bthf)
                    Boundary layer flow (Smdffa)
                        Boundary layer separation (Smdffas)
                             Use For: Flow separation
                    Flow by speed (Smdffb)
                        Subsonic flow (Smdffbb)
                             Use For: Subcritical flow; Subsonic flight
                        Critical flow (Smdffbk)
                        Potential flow (Smdffbm)
                        Supersonic flow (Smdffbp)
                             Use For: Supercritical flow
                        Critical velocity (Smdffbv)
                    Compressible flow (Smdffc)
                    Confined flow (Smdffd)
                         Use For: Duct flow
                        Channel flow (Smdffdc)
                            Critical depth (Smdffdcc)
                            Constrictions (Smdffdce)
                        Pipe flow (Smdffdp)
                        Queuing (Smdffdr)
                             Use For: Queueing; Queues
                        Flow resistance (Smdffdt)
                        Vapor lock (Smdffdv)
                    Convection (Fluid mechanics) (Smdffe)
                         Use For: Bulk flow
                    Flow equations (Smdfff)
                    Infiltration (Smdffg)
                         Use For: Fluid infiltration
                    Laminar flow (Smdffi)
                         Use For: Laminar boundary layer flow
                        Shear rate (Smdffis)
                    Multidimensional flow (Smdffk)
                        Three dimensional flow (Smdffkb)
                        Two dimensional flow (Smdffkt)
                    Multiphase flow (Smdffl)
                        Two phase flow (Smdfflt)
                    Nonnewtonian flow (Smdffm)
                    Nonuniform flow (Smdffn)
                    Overflows (Smdffo)
                    Overtopping (Smdffp)
                    Percolation (Smdffq)
                    Seepage (Smdffr)
                    Slip (Fluid mechanics) (Smdffs)
                    Transitional flow (Smdfft)
                    Turbulence (Smdffu)
                    Viscous flow (Smdffv)
                        Bleeding (Pavements) (Smdffvb)
                             Use For: Flushing (Pavements); Pavement flushing
                    Vortices (Smdffw)
                         Use For: Vortex motion
                        Eddies (Smdffwe)
                        Vortex shedding (Smdffwt)
                    Wakes (Smdffx)
                         Use For: Wake vortices
                    Unsteady flow (Smdffy)
            Fluid resistance (Smdg)
                Wave resistance (Smdgw)
            Hydrodynamics (Smdh)
            Friction (Smdj)
                Abrasion (Smdjb)
                Internal friction (Smdjj)
                Rolling friction (Smdjr)
                    Rolling resistance (Smdjrr)
                Skin friction (Smdjs)
                    Negative skin friction (Smdjsn)
                Sliding friction (Smdjt)
                Traction (Smdju)
                Wall friction (Smdjw)
            Impact (Smdm)
                Impact loads (Smdmk)
                Slamming (Smdms)
            Motion (Smdp)
                 Use For: Mass transfer; Movement; Movements
                Acceleration (Mechanics) (Smdpb)
                     Related Term (Associative): 
                    Lateral acceleration (Smdpbm)
                Deceleration (Smdpd)
                     Related Term (Associative): 
                Falling (Smdpf)
                    Free fall (Smdpff)
                Trajectory (Smdpj)
                     Use For: Trajectories
                Kinetics (Smdpk)
                Oscillation (Smdpn)
                Pitch (Dynamics) (Smdpp)
                     Use For: Pitching
                    Pitching moment (Smdppm)
                Rocking (Smdpq)
                Rolling (Smdpr)
                Rotation (Smdps)
                    Torque (Smdpst)
                         Use For: Moment of force; Rotation moment
                    Yaw (Smdpsy)
                        Hunting (Dynamics) (Smdpsyh)
                Splashing (Smdpt)
                    Sloshing (Smdpts)
                Velocity (Smdpv)
                    Angular velocity (Smdpvc)
                        Angular acceleration (Smdpvcc)
                    Speed (Smdpvs)
                        Mach number (Smdpvsm)
                        Supersonic speed (Smdpvss)
            Rolling contact (Smdr)
                 Use For: Tire pavement interface; Wheel rail interaction
                 Related Term (Associative): Tire/pavement noise (Jfnbtt); Train track dynamics (Qdr); Car wheels (Railroads) (Qpgyrwr)
                Polishing (Aggregates) (Smdrs)
            Vibration (Smdv)
                 Related Term (Associative): Modal analysis (Gebm)
                Damping (Physics) (Smdvd)
                     Use For: Friction damping; Vibration damping; Wave attenuation; Wave damping
                     Related Term (Associative): 
                Flutter (Aeronautics) (Smdvf)
                     Use For: Bridge flutter
                     Related Term (Associative): Aeroelasticity (Smbkb)
                Mechanical vibration (Smdvm)
                Random vibration (Smdvr)
        Energy (Sme)
            Burning rate (Smeb)
            Dissipation (Smed)
                 Use For: Energy dissipation; Energy losses
            Energy balance (Smee)
            Energy conversion (Smef)
                Energy absorption (Smefe)
            Energy levels (Smem)
            Energy transfer (Smen)
            Power (Smep)
                Horsepower (Smeph)
            Specific energy (Smes)
            Work (Mechanics) (Smey)
                Free energy (Smeyd)
                Friction losses (Smeyf)
                Kinetic energy (Smeyk)
                    Regenerative braking (Smeykr)
                Potential energy (Smeyp)
                    Stiffness matrix (Smeyps)
        Failure (Smf)
             Use For: Fatigue failure
             Related Term (Associative): Defects (Ptq)
            Collapse (Smfc)
            Cracking (Smfd)
                 Use For: Cracks; Ductile fracture; Fissures
                Types of cracking (Smfdb)
                    Microcracking (Smfdbp)
                    Stress cracking (Smfdbs)
                        Fatigue cracking (Smfdbsf)
                Pavement cracking (Smfdp)
                     Related Term (Associative): Surface course irregularities (Pmrcpppmby)
                    Cracking of asphalt concrete pavements (Smfdpb)
                        Alligator cracking (Smfdpbb)
                        Block cracking (Smfdpbe)
                             Use For: Map cracking
                        Reflection cracking (Smfdpbr)
                    Cracking of concrete pavements (Smfdpm)
                        D cracking (Smfdpmd)
                        Longitudinal cracking (Smfdpmm)
                             Use For: Centerline cracking
                        Transverse cracking (Smfdpmt)
                Rock fracture (Smfdr)
                     Use For: Rock disintegration; Rupturing
                    Rock jointing (Smfdrj)
                         Use For: Jointed rock; Joints (Geology)
                    Spalling (Smfdrs)
            Debonding (Smfe)
                Blistering (Smfeb)
                Delamination (Smfed)
                     Related Term (Associative): 
            Fatigue (Mechanics) (Smff)
                 Use For: Fatigue (Materials)
            Fracture mechanics (Smfh)
                 Use For: Breaking; Brittle fractures; Cracking (Fracturing); Disintegration (Materials); Fracturing
                Cleavage fracture (Smfhc)
                Slaking (Smfhs)
            Overturning (Smfp)
                 Related Term (Associative): Rollover crashes (Hbbgtat)
            Segregation (Aggregates) (Smfr)
            Stripping (Pavements) (Smfs)
                 Use For: Fretting (Pavements); Raveling (Pavements)
                 Related Term (Associative): ; 
            Tearing (Smft)
                 Use For: Bursting; Lamellar tearing; Ripping
                Blowouts (Smftb)
        Fluid mechanics (Smh)
            Free surface (Smhf)
            Friction factor (Smhh)
            Hydraulic jump (Smhj)
        Force (Smi)
            Buoyancy (Smia)
            Centrifugal force (Smib)
            Centripetal force (Smic)
            Drag forces (Smid)
            Cohesion (Smif)
            Impulses (Mechanics) (Smih)
                 Use For: Impulse loading
            Inertial forces (Smij)
                 Use For: Effective forces
            Internal forces (Smik)
            Loads (Smim)
                Aerodynamic force (Smima)
                     Use For: Aerodynamic loads; Wind forces
                    Aerodynamic lift (Smimam)
                         Use For: Lift
                        Ground effect (Smimamg)
                             Use For: Hovering
                        Lift drag ratio (Smimamm)
                    Stall (Smimas)
                    Thrust (Smimau)
                        Blade loading (Smimaub)
                    Wing loading (Smimaw)
                Axial loads (Smimb)
                Axle loads (Smimc)
                    Equivalent single axle loads (Smimce)
                    Tandem axle loads (Smimct)
                    Wheel loads (Smimcw)
                Breaking loads (Smimd)
                     Use For: Ultimate loads
                Concentrated loads (Smimf)
                Dynamic loads (Smimh)
                     Use For: Dynamic force
                    Blast loads (Smimhb)
                Live loads (Smimm)
                     Use For: Moving loads
                Repeated loads (Smimr)
                     Use For: Cyclic loads
                Static loads (Smims)
                     Use For: Dead loads
                Load transfer (Smimw)
                     Use For: Load distribution
            Pressure (Smip)
                Air pressure (Smipa)
                Back pressure (Smipb)
                Confining pressure (Smipc)
                    Ground pressure (Smipcg)
                         Use For: Rock pressure
                Dynamic pressure (Smipd)
                Earth pressure (Smipe)
                     Use For: Soil pressure
                    Soil structure interaction (Smipes)
                Effective stress (Smipg)
                Pore pressure (Smipp)
                     Use For: Neutral stress
                    Pore water pressures (Smippr)
                    Soil suction (Smipps)
                Preconsolidation pressure (Smipq)
                Static pressure (Smips)
                Uplift pressure (Smipu)
                     Use For: Uplift
                Vacuum (Smipv)
                Water pressure (Smipw)
                     Use For: Hydraulic pressure; Hydromechanic pressure
                    Hydrodynamic pressure (Smipwd)
                    Hydrostatic pressure (Smipws)
                Wind pressure (Smipx)
            Propulsion (Smir)
            Pumping (Pavements) (Smis)
            Set forward force (Smit)
                 Use For: Impact forces
            Tractive forces (Smiu)
                 Use For: Traction forces
        Gravitation (Smk)
             Use For: Gravitational attraction
            Gravitational force (Smke)
            Gravity (Smkg)
                Center of gravity (Smkgc)
        Momentum (Smp)
        Stability (Mechanics) (Sms)
             Related Term (Associative): Rollover crashes (Hbbgtat)
            Directional stability (Smsd)
            Dynamic stability (Smsf)
        Statics (Smu)
            Adhesion (Smub)
                 Use For: Adhesive bonding
                 Related Term (Associative): 
            Aerostatics (Smue)
                Pneumatics (Smuep)
            Equilibrium (Mechanics) (Smuf)
                 Use For: Static equilibrium
            Hydrostatics (Smuh)
            Moments (Mechanics) (Smum)
                Moments of inertia (Smumm)
                Resisting moments (Smumr)
        Stresses (Smv)
             Use For: Stress (Mechanics)
            Arching (Soils) (Smvb)
            Biaxial stress (Smvc)
            Deviatoric stress (Smvd)
                 Use For: Differential stress
            Inelastic stress (Smvj)
            Principal stresses (Smvp)
            Residual stress (Smvq)
            Reynolds stress (Smvr)
                 Use For: Eddy stress
            Shear stress (Smvs)
            Uniaxial stress (Smvu)
            Yield stress (Smvy)
                 Use For: Plastic stress
        Waves (Smw)
             Related Term (Associative): Water waves (Jbhw); Electromagnetic waves (Sfrw)
            Elastic waves (Smwe)
                 Use For: Seismic waves
            Gravity waves (Smwg)
            Internal waves (Smwk)
            Longitudinal waves (Smwm)
            Plane waves (Smwn)
            Solitons (Smwo)
            Surges (Fluid mechanics) (Smwp)
            S waves (Smws)
                 Use For: Shear waves; Transverse waves
            Wave motion (Smwy)
                 Use For: Wave movement; Wave propagation
    Light (So)
        Becke line (Sob)
        Distortion (Optics) (Sod)
        Flicker (Soe)
        Fluorescence (Sof)
        Glare (Soh)
        Infrared radiation (Soj)
        Laser beams (Sok)
        Light transmission (Som)
            Diffusion (Optics) (Somd)
            Light scattering (Soms)
            Luminescence (Somu)
                Chemiluminescence (Somuc)
        Photovoltaic effect (Son)
        Polarized light (Sop)
        Solar radiation (Sos)
            Solar energy (Sose)
                 Related Term (Associative): Solar power generation (Jnrrpps); Solar collectors (Qtpfs)
            Sunlight (Soss)
                 Use For: Sunshine
        Ultraviolet radiation (Sou)
             Use For: Ultraviolet rays
    Nuclear phenomena (Sp)
        Electromagnetic pulses (Spc)
        Excitation (Spd)
             Use For: Wave excitation
        Nuclear energy (Spe)
            Nuclear power (Spep)
        Nuclear explosions (Spf)
        Nuclear magnetic resonance (Spg)
             Use For: Magnetic nuclear resonance; NMR
        Nuclear radiation (Spm)
            Alpha rays (Spmb)
            Beta rays (Spme)
            Gamma rays (Spmg)
            Ionizing radiation (Spmj)
                 Use For: Ionization radiation
                Irradiation (Spmjj)
        Nuclear reactions (Sps)
            Fission (Spsc)
                 Use For: Atomic fission; Nuclear fission
            Fusion (Spsk)
                 Use For: Atomic fusion; Nuclear fusion
            Spallation (Spsr)
            Transfer reactions (Spsu)
        Radioactivity (Spu)
    Surface phenomena (Sr)
         Use For: Surface activity; Surface behavior
        Boundary layer (Srb)
             Use For: Boundaries (Surfaces)
            Interfaces (Srbj)
                 Related Term (Associative): 
                Air water interfaces (Srbjc)
                Oil water interfaces (Srbjp)
                Surfaces (Srbjs)
                    Holes (Srbjsh)
            Turbulent boundary layer (Srbt)
                 Related Term (Associative): Reynolds number (Sav)
        Capillarity (Src)
             Use For: Capillary action
        Rayleigh waves (Srf)
             Use For: Surface waves
        Sorption (Srh)
            Absorption (Srhd)
                 Related Term (Associative): 
                Energy absorption (Srhde)
            Adsorption (Srhk)
            Desorption (Srhr)
        Surface dynamics (Srm)
        Surface energy (Srp)
            Absorption spectra (Srpb)
        Surface tension (Srr)
             Use For: Interfacial tension
        Volume changes (Srv)
            Compression (Srvb)
                 Use For: Compression loads
                Axial compression (Srvbb)
                Decompression (Srvbc)
            Consolidation (Srvc)
                Overconsolidation (Srvcp)
                Secondary consolidation (Srvcs)
            Expansion (Srvg)
                Dilation (Srvgs)
                Thermal expansion (Srvgt)
            Contraction (Srvk)
                Shrinkage (Srvks)
            Swelling (Srvr)
    Heat (St)
         Related Term (Associative): Thermodynamics (Tpxy)
        Heat balance (Stb)
        Heat conduction (Stc)
        Heat convection (Std)
        Heat cycle (Ste)
             Use For: Thermodynamic cycle
        Heat exchange (Stf)
        Heat flow (Stg)
             Use For: Heat transmission
        Heat flux (Sth)
        Heat loss (Stj)
            Scaling factor (Stjs)
        Heat radiation (Stk)
             Use For: Thermal radiation
            Emissivity (Stke)
        Heat transfer (Stm)
        Latent heat (Stn)
        Phase equilibrium (Sto)
        Phase transitions (Stp)
             Use For: Change of state; Phase transformations
            Boiling (Stpb)
                 Use For: Ebullition
            Condensation (Stpc)
            Contraction (Thermodynamics) (Stpd)
            Evaporation (Stpe)
            Freezing (Stpf)
            Liquefaction (Stpk)
            Melting (Stpm)
            Solidification (Stps)
            Vapor phases (Stpu)
            Volatilization (Stpv)
                 Use For: Vaporization
                Boil off (Stpvb)
        Supercooling (Stq)
        Temperature gradients (Str)
            Thermoclines (Strt)
        Degradation (Thermodynamics) (Sts)
        Thermal diffusion (Stt)
        Thermal efficiency (Stu)
             Use For: Efficiency (Thermodynamics)
        Thermal expansion (Stv)
        Thermal fatigue (Stw)
        Thermal stresses (Stx)
            Thermal shock (Stxs)
        Vapor pressure (Sty)
    Systems (Sy)
        System architecture (Sya)
             Related Term (Associative): System design (Esdss)
        Complex systems (Syc)
        Discrete systems (Sye)
             Use For: Discrete time systems
        Fuzzy systems (Syg)
        Networks (Syn)
             Use For: Connections
            Connectivity (Sync)
            Links (Networks) (Synk)
            Nodes (Networks) (Synn)
        Subsystems (Sys)

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