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Topics referred to by the same term
Effective mass may refer to: Effective mass (solid-state physics), a property of an excitation in a crystal analogous to the mass of a free particle Effective
Effective_mass
Mass of a particle when interacting with other particles
particle's effective mass (often denoted m ∗ {\textstyle m^{*}} ) is the mass that it seems to have when responding to forces, or the mass that it seems
Effective mass (solid-state physics)
Effective_mass_(solid-state_physics)
Parameter in physics problems
frequency of oscillation, and the effective mass of the spring, m e f f {\displaystyle m_{\mathrm {eff} }} , is defined as the mass that needs to be added to
Effective mass (spring–mass system)
Effective_mass_(spring–mass_system)
The thermal effective mass of electrons in a metal is the apparent mass due to interactions with the periodic potential of the crystal lattice, with phonons
Thermal_effective_mass
Rapid oscillations of electron density
for using the effective mass m ∗ {\displaystyle m^{*}} . Plasma oscillations can result in an effective negative mass. Consider the mass–spring model in
Plasma_oscillation
yield, reaction mass efficiency and effective mass efficiency are all metrics that compare the mass of desired product to the mass of waste. They do
Green_chemistry_metrics
Concept in physical models
theoretical physics, negative mass is a hypothetical type of exotic matter whose mass is of opposite sign to the mass of normal matter, e.g. −1 kg. Such
Negative_mass
Motion of charged particles
not exactly the same way. For these materials, we define a cyclotron effective mass, m ∗ {\displaystyle m^{*}} so that: ω c = q B m ∗ {\displaystyle \omega
Cyclotron_motion
Dimensionless quantity in spectroscopy
/ m ∗ {\displaystyle m/m^{*}} of the free electron mass m {\displaystyle m} to its effective mass m ∗ {\displaystyle m^{*}} in a crystal can be considered
Oscillator_strength
Solid-state physics model
semi-empirical approach for calculating the band structure (particularly effective mass) and optical properties of crystalline solids. It is pronounced "k dot
K·p_perturbation_theory
Conceptual opposite of an electron
calculations show that electrons have a negative effective mass at the top of a band. Although negative mass is unintuitive, a more familiar and intuitive
Electron_hole
Alloy
effective mass of GaInAs m*/m° = 0.041 is the smallest for any semiconductor material with an energy bandgap greater than 0.5 eV. The effective mass is
Indium_gallium_arsenide
Intermetallic compound with 4f and 5f electrons in unfilled electron bands
compounds behave as if they had an effective mass up to 1,000 times the free particle mass. This large effective mass is also reflected in a large contribution
Heavy_fermion_material
Interface between two layers or regions of dissimilar semiconductors
the achieved quantum well, understanding variation or mismatch of the effective mass across the heterojunction becomes substantial. The quantum well defined
Heterojunction
Fundamental theorem in condensed matter physics
_{n\mathbf {k} }^{*}(-i\nabla )\psi _{n\mathbf {k} }} For the effective mass effective mass theorem ∂ 2 ε n ( k ) ∂ k i ∂ k j = ℏ 2 m δ i j + ( ℏ 2 m )
Bloch's_theorem
Philosophical and social movement
Effective accelerationism (e/acc) is a 21st-century ideological movement that advocates for an explicitly pro-technology stance. Its proponents believe
Effective_accelerationism
Type of approximation to an underlying physical theory
could be described as "effective", as in being the "low energy limit" of an as-yet unknown theory of everything. Effective mass (solid-state physics) Emergence
Effective_theory
Concept in quantum mechanics
m_{\text{w}}^{*}} is the effective mass of the carriers within the well region. The effective mass of a carrier is the mass that the electron "feels"
Quantum_well
Philosophical and social movement
assessment that mass deworming is "generally highly cost-effective"; however, there is substantial uncertainty about the benefits of mass deworming programs
Effective_altruism
Amount of beer in a regulation mug
(LMU Munich), a Maßkrug is an "effective percussion tool" in which each strike is potentially life-threatening. An empty Maß weighs 1.3 kilograms (2.9 lb)
Maß
Rate constant in engineering
{n}}_{A}} is the mass transfer rate [mol/s] A {\displaystyle A} is the effective mass transfer area [m2] Δ c A {\displaystyle \Delta c_{A}} is the driving
Mass_transfer_coefficient
Material of moderate electrical conductivity
field, etc.) much as they would in a vacuum, though with a different effective mass. Because the electrons behave like an ideal gas, one may also think
Semiconductor
Maoist organizational method
their attainment of power to the faithful pursuit of effective "mass line" tactics, and a "correct" mass line is supposed to be the essential prerequisite
Mass_line
Concept in condensed matter physics
with atomic nuclei. The electron behaves as though it has a different effective mass travelling unperturbed in vacuum. Such an electron is called an electron
Quasiparticle
Amount of matter present in an object
real number. Mass versus weight Electromagnetic mass Effective mass (spring–mass system) Effective mass (solid-state physics) Extension (metaphysics) International
Mass
Concept in fluid mechanics
indicating that the surrounding fluid increased the effective mass of the system. The concept of added mass is arguably the first example of renormalization
Added_mass
Theoretical model in physics
partially filled f orbitals. The effective mass of electrons in these materials is much larger than the free-electron mass because of interactions with other
Fermi_liquid_theory
Ukrainian physicist (1917–1985)
coupling limit, polaron binding energy was found by Pekar, and its effective mass is described by the Landau-Pekar formula. While polaron moves freely
Solomon_Pekar
Equation in solid-state physics
m*h being the hole effective mass and h being the Planck constant. Using the carrier concentration equations given above, the mass action law can be stated
Mass_action_law_(electronics)
Soviet assault rifle
slanted muzzle compensator, and simplified manufacturing for cost‑effective mass production, the AKM enhanced automatic accuracy and reliability while
AKM
Type of operator expectation value
above, gives a large effective mass to quarks, and distinguishes between phases of quark matter. This underlies the bulk of the mass of most hadrons. The
Vacuum_expectation_value
Quasiparticle in condensed matter physics
cloud. This lowers the electron mobility and increases the electron's effective mass. The general concept of a polaron has been extended to describe other
Polaron
Physical system that responds to a restoring force proportional to displacement
spring, m {\displaystyle m} is the mass on the end of the spring. If the spring itself has mass, its effective mass must be included in m {\displaystyle
Harmonic_oscillator
Ford's assembly-line mass production and consumption manufacturing system
labor-economic systems that support industrialized, standardized mass production and mass consumption. The concept is named after Henry Ford. It is used
Fordism
Change in velocity per amount of fuel
higher than the "effective exhaust velocity", which is the "velocity" of the specific impulse. The momentum exchanged and the mass used to generate it
Specific_impulse
Quantum dot nanocrystal equation
Planck constant h, the radius of the quantum dot r, as well as the effective mass of the excited electron me* and of the excited [[electron hole |hole]]
Brus_equation
Physical quantity in soil
Effective stress is a fundamental concept in soil mechanics and geotechnical engineering that describes the portion of total stress in a soil mass that
Effective_stress
Quasiparticle which is a bound state of an electron and an electron hole
relatively narrow allowed energy bands and accordingly, rather heavy effective mass. In the case of Wannier-Mott excitons, the relative motion of electron
Exciton
Net potential energy encountered in orbital mechanics
derivative of the effective potential with respect to r {\displaystyle r} and is evaluated at a minimum. Consider a particle of mass m orbiting a much
Effective_potential
normal conduction electrons leading to quasiparticles with an enhanced effective mass.[citation needed] From specific heat measurements Δ C / C ( T C ) {\displaystyle
Heavy_fermion_superconductor
Quantity in solid-state physics
carrier effective mass, and τ is the average scattering time. If the effective mass is anisotropic (direction-dependent), m* is the effective mass in the
Electron_mobility
Type of quark
the 'effective mass' (or 'dressed' mass) of quarks becomes greater because of the binding energy caused by the gluon field between quarks (see mass–energy
Down_quark
Light-matter quasiparticle
exciton–polaritons inherit some properties from both of their roots, such as a light effective mass (from the photons) and a capacity to interact with each other (from
Exciton-polariton
Effective mass of a binary system
In astrophysics, the chirp mass of a compact binary system determines the leading-order orbital evolution of the system as a result of energy loss from
Chirp_mass
Mathematical equation describing the motion of a rocket
\infty } , with an effective exhaust speed v eff {\displaystyle v_{\text{eff}}} such that the mechanical energy gained per unit fuel mass is given by 1 2
Tsiolkovsky_rocket_equation
Incidents involving multiple victims of firearm violence
are effective at reducing mass shootings. A panel of mental health and law enforcement experts has estimated that roughly one-third of acts of mass violence—defined
Mass shootings in the United States
Mass_shootings_in_the_United_States
Type of approximation to an underlying physical theory
the extreme mass ratio (EMR), which in the context of the inspiralling problem is called extreme mass ratio inspiral. Presently, effective field theories
Effective_field_theory
Phase of matter
paradigm based on the assumption that the effective mass is approximately constant, in the FCQPT theory the effective mass of new quasiparticles strongly depends
Quantum_spin_liquid
Audible vibration that travels via pressure waves in matter
work indicates that sound waves carry an extremely small effective gravitational mass. This mass arises from nonlinear corrections to the stress–energy
Sound
Calculated property of a star or planet
The effective temperature (aka ET) of a body such as a star or planet is the temperature of a black body that would emit the same total energy as electromagnetic
Effective_temperature
motion depends on the balance between the molecule's effective mass (which includes both the mass of the molecule itself and any solvent molecules that
Ion_vibration_current
carriers into a higher energy state where they actually have higher effective mass and thus slow down. In effect, carrier velocities and current drop as
Ridley–Watkins–Hilsum_theory
Reciprocating engine valve actuation mechanism
on the mass distribution of the moving parts. The effective mass of a traditional valve with spring includes one-half of the valve spring mass for symmetric
Desmodromic_valve
Quasiparticle in the fractional quantum Hall effect
the analysis of the Shubnikov–de Haas experiments, one can deduce the effective mass and the quantum lifetime of composite fermions. With further increase
Composite_fermion
Science fiction media franchise
effects, while a negative current does the inverse by reducing mass and improves the cost-effective expenditure of fuel for starships that move at FTL speeds
Mass_Effect
English record turntable and tonearm company
low effective mass to fit high compliance cartridges such as the Shure V15 IV. The Series V arm launched in 1986, was developed as a medium mass arm more
SME_Limited
Type of quark
'effective mass' (or 'dressed' mass) of quarks becomes greater because of the binding energy caused by the gluon field between each quark (see Mass–energy
Up_quark
Effective inertial mass
In physics, reduced mass is a measure of the effective inertial mass of a system with two or more particles when the particles are interacting with each
Reduced_mass
Heat capacity of an electron gas
phase transition. Drude model Fermi–Dirac statistics Thermal effective mass Effective mass Superconductivity BCS theory Kittel 2005, p. 156. Kittel 2005
Electronic_specific_heat
Effect on materials in an intense magnetic field
quantum mechanical nature of matter. It is often used to determine the effective mass of charge carriers (electrons and electron holes), allowing investigators
Shubnikov–de_Haas_effect
Change in optical absorption by a semiconductor when an electric field is applied
ignored and the bound state- electron-hole pair is very weak and the effective mass approximation is valid for the treatment. Then we can make up the following
Franz–Keldysh_effect
Loitering missile
modular, and easy-to-deploy loitering munition system. Designed with cost-effective mass production in mind, the X-Wing can fly up to 50 kilometers (31 miles)
Granta_X
Subatomic particle having no substructure
measured directly. Since their masses are so small compared to the effective mass of the surrounding gluons, slight differences in the calculation make
Elementary_particle
Hypothetical scalar particle that couples to matter more weakly than gravity
candidate. Due to a non-linear self-interaction, it has a variable effective mass which is an increasing function of the ambient energy density—as a result
Chameleon_particle
Star in the constellation Canis Major
layers. The total mass shed during this active period by the four observed knots and clumps is over 0.05 M☉, yielding an effective mass loss rate of at
VY_Canis_Majoris
Phenomenon observed in physics
today's world. Within a solid the mass in the cyclotron frequency equation above is replaced with the effective mass tensor m ∗ {\displaystyle m^{*}}
Electron_cyclotron_resonance
Traditional Chinese unit for weight
limit the newer Chinese units of measurement to private sales and trade, effective on 1 January 1930. These newer "market" units are based on rounded metric
Liang_(mass)
Analytical technique based on determining mass to charge ratio of ions
Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum
Mass_spectrometry
Quantum mechanical waves describing matter
proportional to the wave vector squared. A common approach is to define an effective mass which in general is a tensor m i j ∗ {\displaystyle m_{ij}^{*}} given
Matter_wave
Effect in quantum electronics
electron effective mass m e ∗ {\displaystyle m_{e}^{*}} with the hole effective mass m h ∗ {\displaystyle m_{h}^{*}} . Introducing the total effective mass m
Quantum-confined_Stark_effect
Periodic structure of layers of two or more materials
{\displaystyle \ E_{z}(k_{z})={\frac {\Delta }{2}}(1-\cos(k_{z}d))} and the effective mass changes sign for 2 π / d {\displaystyle 2\pi /d} : m ∗ = ℏ 2 ∂ 2 E
Superlattice
Berry's phase, which is due to the zero effective mass of carriers near the Dirac points. Despite this zero effective mass, the temperature dependence of the
Electronic properties of graphene
Electronic_properties_of_graphene
Submachine gun
rear through an adapted cam-pin slot. This acceleration amplifies the effective mass of the bolt carrier, slowing the speed of the bolt head. This delay
CMMG_MkG
British service rifle
M98-pattern action was built to fire it, the Pattern 1913 Enfield (P13); effective mass production was still not in effect when World War I started, due to
Pattern_1914_Enfield
Charge carriers per volume; such as electrons, ions, "holes" or others
{E_{c}-E_{f}}{k_{\text{B}}T}}}} Here m ∗ {\displaystyle m^{*}} is the effective mass of the electrons in that particular semiconductor, and the quantity
Charge_carrier_density
Relativistic interaction in quantum physics
\gamma _{1,2,3}} are the Luttinger parameters (analogous to the single effective mass of a one-band model of electrons) and J x , y , z {\displaystyle J_{{\text{x}}
Spin–orbit_interaction
Degenerate matter made from strange quarks
strange matter. It could conceivably be non-strange quark matter, if the effective mass of the strange quark were too high. Charm quarks and heavier quarks
Strange_matter
Effective field theory describing the physics of heavy quarks
chromodynamics, heavy quark effective theory (HQET) is an effective field theory describing the physics of heavy (that is, of mass far greater than the QCD
Heavy_quark_effective_theory
Inverse of the average of the inverses of a set of numbers
[citation needed] The "conductivity effective mass" of a semiconductor is also defined as the harmonic mean of the effective masses along the three crystallographic
Harmonic_mean
Wood panel product made from solid-sawn lumber
board, must be used in conjunction with the CLT panels. Changing the effective mass area of the CLT panel by increasing thickness or adding a second panel
Cross-laminated_timber
Experiment measuring neutrino mass
but the absolute mass values are not yet known. The effective mass of the linear superposition is, for convenience, termed the mass of the electron neutrino
Project 8 (physics experiment)
Project_8_(physics_experiment)
Quasi-particle
c_{1}} and c 2 {\displaystyle c_{2}} are fitting parameters. In the effective-mass approximation, the Hamiltonian of the system consisting of two electrons
Biexciton
Peoples Temple cult settlement in Guyana, led by Jim Jones
led by Jim Jones. On November 18, 1978, 918 people died in a coordinated mass murder-suicide across three locations: the Jonestown compound, a nearby airstrip
Jonestown
Method in physics used to deal with infinities
electron. The total effective mass of a spherical charged particle includes the actual bare mass of the spherical shell (in addition to the mass mentioned above
Renormalization
Average distance travelled by a particle between impacts with other particles
the charge, τ {\displaystyle \tau } is the mean free time, m* is the effective mass, and vF is the Fermi velocity of the charge carrier. The Fermi velocity
Mean_free_path
where the short range potential determines the energy levels, not the effective mass states. This contributes additional energy states that can be used for
Shallow_donor
Probability of ill health effects from ionizing radiation
Effective dose is a dose quantity in the International Commission on Radiological Protection (ICRP) system of radiological protection. It is the tissue-weighted
Effective_dose_(radiation)
Armour with plates spaced a distance apart
30–45°, increasing the space between the armour and the plate. It was effective (mass-to-efficiency ratio), but easily detached from the vehicle so it did
Spaced_armour
Musical artist
Krishna Kant Shukla's PhD work is titled "Calculations of Electron Effective Mass based on 3-D Kroenig Penny Model with Application to Solids". A pioneering
Krishna_Kant_Shukla
Ongoing extinction event caused by human activity
catastrophic levels of past mass extinctions, Barnosky et al. (2011) and Hull et al. (2015) points out that extinction rates during past mass extinctions cannot
Holocene_extinction
Magnetic property of ordinary materials
susceptibilities may change due to the effective mass of the charge carriers differing from the electron mass in vacuum, increasing the diamagnetic contribution
Diamagnetism
Spread of illness without organic cause
Mass psychogenic illness (MPI), also called mass sociogenic illness, mass psychogenic disorder, epidemic hysteria or mass hysteria, involves the spread
Mass_psychogenic_illness
Material designed to manipulate sound waves
through a distributed Bragg reflector. In certain frequency bands, the effective mass density and bulk modulus may become negative. This results in a negative
Acoustic_metamaterial
has isotropic effective mass, for instance GaAs. In case of silicon, conduction band minima does not lie at k = 0 and the effective mass depends on the
Monte Carlo methods for electron transport
Monte_Carlo_methods_for_electron_transport
1952 book about public relations
V. S. Gupta (2001) Handbook of Journalism and Mass Communication Murphy, H.A. et al., (2000) Effective Business Communication 7th Edition, McGraw-Hill
Effective_Public_Relations
Property of materials
of absorption cross section where the effective area is defined per unit mass instead of per particle. The mass attenuation coefficient is defined as
Mass_attenuation_coefficient
Concept in quantum mechanics
of waves (wave packets) that move with a group velocity and have an effective mass. Both of these depend upon the energy, which in turn connects to the
Wave–particle_duality
Class of elementary particles
lepton starts out with no intrinsic mass. The charged leptons (i.e. the electron, muon, and tau) obtain an effective mass through interaction with the Higgs
Lepton
Unit of mass
The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement. Various definitions have
Pound_(mass)
Materials engineered to have properties that have not yet been found in nature
both longitudinal and shear wave propagation through effective properties such as negative mass density or modulus. Acoustic metamaterials fall within
Metamaterial
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EFFECTIVE MASS
EFFECTIVE MASS
Boy/Male
Indian, Sanskrit
Not Defective; Healthy; Whole
Girl/Female
Sikh
Form of God, Effective
Boy/Male
Muslim Hindi
Worker. Effective.
Surname or Lastname
English
English : variant of Mace 1.French (Picardy) : metonymic occupational name from masse ‘mace’, ‘hammer’.French : habitational name from places called Masse (Allier and Cô-d’Or), or La Masse (Eure, Lot, Puy-de-Dôme, Saône-et-Loire).French (Massé) : habitational name from a place called Massé in Maine-et-Loire, so named from Gallo-Roman Macciacum (from the personal name Maccius + the locative suffix -acum).Dutch : from Middle Dutch masse ‘clog’; ‘cudgel’, perhaps a metonymic occupational name for someone who wielded a club.Dutch : possibly a variant of Maas 1, or a patronymic from Mas.
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Effective; Efficient; Goddess Durga
Boy/Male
Indian, Punjabi, Sikh, Tamil, Telugu
Light of King; Effective King; Light of Day
Surname or Lastname
English
English : variant of Masongill (see Massengill).
Boy/Male
Hindu, Indian
Effective
Surname or Lastname
English
English : variant of Masongill (see Massengill).
Boy/Male
Anglo, Australian, Hindu, Indian, Kurdish, Punjabi, Sikh
Pain; Effective
Boy/Male
Arabic, Indian, Muslim, Sindhi
Doer; Work Man; Worker; Effective
Boy/Male
Indian, Sanskrit
The Spring Season; Effecting Wishes
Boy/Male
Hindu, Indian, Marathi
Effective; Powerful
Surname or Lastname
English
English : variant of Masongill (see Massengill).
Boy/Male
Arabic, Muslim
One who Desires Another to do Something Effectively
Boy/Male
Indian, Punjabi, Sikh
One who is Aware and Reflective
Surname or Lastname
English and Scottish (of Norman origin) and French
English and Scottish (of Norman origin) and French : habitational name from any of various places in northern France which get their names from the Gallo-Roman personal name Maccius + the locative suffix -acum.English (of Norman origin) : habitational name from Marcy in La Manche. This surname is preserved in the English place name Stondon Massey.English : from a pet form of Matthew.Altered spelling of French Massé (see Masse 4).
Boy/Male
Tamil
Form of God, Effective
Boy/Male
Muslim
Worker. Effective.
Boy/Male
Hindu
Form of God, Effective
EFFECTIVE MASS
EFFECTIVE MASS
EFFECTIVE MASS
EFFECTIVE MASS
EFFECTIVE MASS
EFFECTIVE MASS
EFFECTIVE MASS
superl.
Vigorous; effective; forcible; powerful.
a.
Effective.
a.
Effective, as a cause or agent; causing.
a.
Exerting the power of choice; selecting; as, an elective act.
n.
The quality of being effective.
n.
One who is capable of active service.
a.
Capable of exercising thought or judgment; as, reflective reason.
a.
Lacking some of the usual forms of declension or conjugation; as, a defective noun or verb.
a.
Not effective.
a.
Incapable of, or indisposed to, effective action; habitually slack or remiss; effecting little or nothing; as, inefficient workmen; an inefficient administrator.
a.
Wanting in something; incomplete; lacking a part; deficient; imperfect; faulty; -- applied either to natural or moral qualities; as, a defective limb; defective timber; a defective copy or account; a defective character; defective rules.
a.
Addicted to introspective or meditative habits; as, a reflective person.
a.
Having the power to produce an effect or effects; producing a decided or decisive effect; efficient; serviceable; operative; as, an effective force, remedy, speech; the effective men in a regiment.
a.
Dependent on choice; bestowed or passing by election; as, an elective study; an elective office.
a.
Throwing back images; as, a reflective mirror.
n.
Direct, forcible, and effective speaking.
a.
Not effective; ineffectual; futile; inefficient; useless; as, an ineffective appeal.
n.
That which produces a given effect; a cause.
adv.
Effectively.
n.
Specie or coin, as distinguished from paper currency; -- a term used in many parts of Europe.
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