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See searches and references containing NEGATIVE TEMPERATURE!NEGATIVE TEMPERATURE
Physical systems hotter than any other
thermodynamic systems can achieve negative thermodynamic temperature; that is, their temperature can be expressed as a negative quantity on the Kelvin or Rankine
Negative_temperature
Physical quantity of hot and cold
body at that temperature. However, negative absolute temperatures exist, and are actually hotter than any positive temperature. Temperature is important
Temperature
Differential equation parameter in thermal physics
as reactivity. The temperature coefficient of most of the reactions lies between 2 and 3. Most ceramics exhibit negative temperature dependence of resistance
Temperature_coefficient
Differentiating positive and negative zero
−1/Temperature. In this context, a temperature of −0 is a (theoretical) temperature larger than any other negative temperature, corresponding to the maximum
Signed_zero
Type of resistor whose resistance varies with temperature
conduction models. Negative-temperature-coefficient (NTC) thermistors have less resistance at higher temperatures, while positive-temperature-coefficient (PTC)
Thermistor
Control concept
response to temperature changes were used in negative feedback systems to control vents in furnaces, maintaining a steady internal temperature. In the invisible
Negative_feedback
Lowest theoretical temperature
temperature, beyond which the gas would have negative pressure or volume—an unphysical result. To resolve this, the concept of absolute temperature is
Absolute_zero
SI unit of temperature
of temperature scales International Temperature Scale of 1990 kT (energy) – product of the Boltzmann constant and temperature Negative temperature Outline
Kelvin
Concept in physical models
and negative matter particles will have the positive matter portion increase in temperature without bound.[citation needed] However, the negative matter
Negative_mass
Voltage reference used in integrated circuits
positive temperature coefficient (i.e., it increases with temperature). The base–emitter voltage for each transistor has a negative temperature coefficient
Brokaw_bandgap_reference
resistance when subjected to a corresponding change in body temperature. Negative Temperature Coefficient (NTC) thermistors exhibit a decrease in electrical
List_of_temperature_sensors
Key reliability issue in MOSFETs
Negative-bias temperature instability (NBTI) is a key reliability issue in MOSFETs, a type of transistor aging. NBTI manifests as an increase in the threshold
Negative-bias temperature instability
Negative-bias_temperature_instability
Natural disaster in Europe
reconstruction of temperatures in Europe for the year 1540. Brown‑red shading indicates positive, and blue shading negative temperature anomalies relative
The year-round heat and drought of 1540 in Europe
The_year-round_heat_and_drought_of_1540_in_Europe
Physical property of matter
tens of atoms close to a phase transition. A negative heat capacity can result in a negative temperature. According to the virial theorem, for a self-gravitating
Heat_capacity
Natural disaster in Europe
reconstruction of temperatures in Europe for the year 1473. Brown‑red shading indicates positive, and blue shading negative temperature anomalies relative
1473 heat and drought in Europe
1473_heat_and_drought_in_Europe
Real number that is strictly less than zero
and negative. Negative numbers are used to describe values on a scale that goes below zero, such as the Celsius and Fahrenheit scales for temperature. The
Negative_number
predicted by Onsager to exhibit states of negative temperature. The possibility of negative absolute temperature originates with Onsager's analysis of the
Two-dimensional quantum turbulence
Two-dimensional_quantum_turbulence
Maximal instantaneous input current drawn by an electrical device when first turned on
(Non-graphitized) carbon-filament lamps, rarely used now, have a negative temperature coefficient and draw more current as they warm up; an "inrush" current
Inrush_current
State of low temperature
low temperatures Cryosphere – Earth's surface where water is frozen Freezing point – Temperature at which a solid turns liquid Negative temperature – Physical
Cold
Type of nuclear reactor
the reactivity feedback of the temperature change caused by increased or decreased steam flow. (See: Negative temperature coefficient.) Boron and cadmium
Pressurized_water_reactor
Number
example, for an absolute temperature (typically measured in kelvins), zero is the lowest possible value. (Negative temperatures can be defined for some
0
Concept in statistical mechanics
current in each stroke. The excitation temperature can even be a negative temperature for a system with inverted levels (such as a maser). The 21 cm line
Excitation_temperature
Topics referred to by the same term
zero". As such, it is usually used for negative numbers; the most common usage refers to negative temperature. Sub-zero can also refer to: Sub-Zero (Mortal
Subzero
Proposed fuel-recycling commercial reactor
conversion system. According to Oklo, the reactor would have had a "large negative temperature reactivity coefficient", lack pumps and valves, use heat pipes for
Aurora_nuclear_reactor
Class of nuclear reactor used for education and research
fuel, which has a large, prompt negative fuel temperature coefficient of reactivity, meaning that as the temperature of the core increases, the reactivity
TRIGA
Property of light sources related to black-body radiation
Color temperature is a parameter describing the color of a visible light source by comparing it to the color of light emitted by an idealized opaque,
Color_temperature
Concept in thermodynamics
T<T_{\text{inv}}} , expansion causes temperature to decrease because the work of attractive intermolecular forces dominates, giving a negative change in average molecular
Inversion_temperature
Phenomenon of non-ideal fluids changing temperature
is negative at both very high and very low temperatures; at very high pressure it is negative at all temperatures. The maximum inversion temperature (621
Joule–Thomson_effect
Quantum state of a system
temperature of a group of particles is indicative of the level of excitation (with the notable exception of systems that exhibit negative temperature)
Excited_state
Alloy of copper and nickel
[2%] ). In 1887, Edward Weston discovered that metals can have a negative temperature coefficient of resistance, inventing what he called his "Alloy No
Constantan
Image on photographic film
In photography, a negative is an image, usually on a strip or sheet of transparent plastic film, in which the lightest areas of the photographed subject
Negative_(photography)
Chemical compound
short-chain length, methyl butyrate does not reproduce well the negative temperature coefficient (NTC) behaviour and early CO2 formation characteristics
Methyl_butyrate
Lowest energy level of a quantum system
the highest excited state to have absolute zero temperature for systems that exhibit negative temperature. In one dimension, the ground state of the Schrödinger
Ground_state
Kinetic energy of an unbound neutron
detection temperature, also called the neutron energy, indicates a free neutron's kinetic energy, usually given in electron volts. The term temperature is used
Neutron_temperature
Component used to limit inrush current
components and avoid blowing fuses or tripping circuit breakers. Negative temperature coefficient (NTC) thermistors and fixed resistors are often used
Inrush_current_limiter
Fluid used to maximize thermal contact
cause a runaway to catastrophic failure of the device due to the negative temperature coefficient property of semiconductors. Factory PCs and laptops—although
Thermal_paste
Difference of a temperature from a reference value
Temperature anomaly is the difference, positive or negative, of a temperature from a base or reference value, normally chosen as an average of temperatures
Temperature_anomaly
American theoretical nuclear physicist (1925–2004)
prompt negative temperature coefficient was groundbreaking because it provided a markedly safer reactor even in the event of misuse. With the negative temperature
Ted_Taylor_(physicist)
Freezer used for storing contents at unusually low temperatures
commonly referred to as a "minus 80 freezer" or a "negative 80 freezer", referring to the most common temperature standard. ULT freezers come in upright and chest
Ultra-low_temperature_freezer
Weather phenomenon involving electrostatic discharge
the thunderstorm cloud due to the precipitation and warmer temperatures. The positive-negative-positive charge regions commonly occur in mature thunderstorms
Lightning
Type of diode
have a small positive temperature coefficient of voltage, whereas diodes relying on the Zener effect have a negative temperature coefficient.[dubious –
Avalanche_diode
Type of nuclear reactor cooled by molten material
generators.[citation needed] MSRs exploit a negative temperature coefficient of reactivity and a large allowable temperature rise to prevent criticality accidents
Molten-salt_reactor
Chemical data page
equilibrium temperature of vapor over solid. Otherwise temperature is equilibrium of vapor over liquid. Note that these are all negative temperature values
Methane_(data_page)
Measure of the coldness of a system
content to temperature, β is generally considered a more fundamental quantity than temperature owing to the phenomenon of negative temperature, in which
Thermodynamic_beta
Type of resistive heater
materials have somewhat negative temperature coefficients at low temperatures and at high temperatures, however there is a temperature range in between where
Self-regulating_heater
Electric light bulb with a resistively heated wire filament
were made from carbonized paper or bamboo. Carbon filaments have a negative temperature coefficient of resistance—as they get hotter, their electrical resistance
Incandescent_light_bulb
Process in physical chemistry
show NTE over certain temperature ranges. Fairly pure silicon (Si) has a negative coefficient of thermal expansion for temperatures between about 18 K and
Negative_thermal_expansion
NASA project aimed at producing a nuclear reactor for space
geometry that creates a negative temperature reactivity coefficient. In effect this means that as the power demand increases the temperature of the reactor drops
Kilopower
Mixture of liquids whose proportions do not change when distilled
point temperatures of any of its constituents (a positive azeotrope), or greater than the boiling point of any of its constituents (a negative azeotrope)
Azeotrope
Probability distribution of energy states of a system
Boltzmann Fair Division Bose–Einstein statistics Fermi–Dirac statistics Negative temperature Softmax function Landau, Lev Davidovich & Lifshitz, Evgeny Mikhailovich
Boltzmann_distribution
Homogeneous mixture of a solute and a solvent
different phase. The properties of the mixture (such as concentration, temperature, and density) can be uniformly distributed through the volume but only
Solution_(chemistry)
Copper-based alloy
with temperature, introducing errors in precision measurements. In 1887, Weston discovered that certain alloys could possess a negative temperature coefficient
Manganin
Naval nuclear reactor
steady-state operation comes as a result of the coolant water's negative temperature coefficient. The power of the reactor is determined by the instantaneous
A2W_reactor
Type of rechargeable battery
as increased ohmic impedance of the negative electrode and a drop in the cyclable Ah charge. At constant temperature, the SEI film thickness (and therefore
Lithium-ion_battery
Flow of electric charge
semiconductors, the charge carriers can be positive or negative, depending on the dopant used. Positive and negative charge carriers may even be present at the same
Electric_current
Decrease in value at a rate proportional to the current value
Thermoelectricity: The decline in resistance of a Negative Temperature Coefficient Thermistor as temperature is increased. Vibrations: Some vibrations may
Exponential_decay
Type of refractory ceramics
Ultra-high-temperature ceramics (UHTCs) are a type of refractory ceramics that can withstand extremely high temperatures without degrading, often above
Ultra-high temperature ceramic
Ultra-high_temperature_ceramic
Quantized flux circulation of some physical quantity
to exhibit negative temperatures. Onsager provided the first prediction that some isolated systems can exhibit negative Boltzmann temperature. Onsager's
Quantum_vortex
of Infrared radiation), temperature up and down until the pattern is "just resolvable." The positive and negative temperature differences are stored into
Minimum resolvable temperature difference
Minimum_resolvable_temperature_difference
Type of metal fluoride glass
a relatively low glass transition temperature (Tg) of 260–300 °C, low dispersion and a low and negative temperature dependence of refractive index dn/dT
ZBLAN
Type of dieting food
consume it in smoothie form while it's still at freezing temperature. Diets based on negative-calorie food do not work as advertised but can lead to weight
Negative-calorie_food
Oxide of silicon
similar to those observed in liquid water: negative temperature expansion, density maximum at temperatures ~5000 °C, and a heat capacity minimum. Its
Silicon_dioxide
average annual temperature of all weather stations in Japan so far. The only area with a negative value, Mount Fuji's extreme maximum temperature was only 17
List of extreme temperatures in Japan
List_of_extreme_temperatures_in_Japan
Global climate phenomenon
climate phenomenon that emerges from variation in winds and sea surface temperatures over the tropical Pacific Ocean. Those variations have an irregular pattern
El_Niño–Southern_Oscillation
Japanese pharmacologist (1927–2013)
basis for insecticidal actions Nerve sensitivity as a basis for the negative temperature dependence of insecticidal action of DDT Nerve sensitivity as a major
Toshio_Narahashi
Smallest amount of fissile material needed to sustain a nuclear reaction
different topic). Thermal expansion associated with temperature increase also contributes a negative coefficient of reactivity since fuel atoms are moving
Critical_mass
Electrical circuit
curve. Temperature-compensated log amplifiers may include more than one opamp and use closely-matched circuit elements to cancel out temperature dependencies
Log_amplifier
Partial differential equation describing the evolution of temperature in a region
heat energy per unit area through a surface is proportional to the negative temperature gradient across it: q = − k ∇ u {\displaystyle \mathbf {q} =-k\,\nabla
Heat_equation
Tendency to give more importance to negative experiences than positive ones
or negatively a change in temperature is interpreted. With respect to positive and negative gradients, it seems that negative events are thought to be
Negativity_bias
Two-terminal electronic component
a negative temperature coefficient, typically −2 mV/°C for silicon diodes. The temperature coefficient is approximately constant for temperatures above
Diode
Rate of change of speed of sound with distance
there is a negative temperature gradient in atmosphere. The speed of sound decreases with decreasing temperature, so this also creates a negative sound speed
Sound_speed_gradient
Maintaining a desired system temperature
Temperature control is a process in which change of temperature of a space (and objects collectively there within), or of a substance, is measured or
Temperature_control
Safety feature in electrical engineering
power dissipation drawback), or negative temperature coefficient thermistors are simple options, while a positive temperature coefficient thermistor is used
Current_limiting
Comparison of the properties of the three main categories in the periodic table
europium has a negative temperature coefficient of resistance' i.e. that conductivity increases with rising temperature At or near room temperature Chedd defines
Properties of metals, metalloids and nonmetals
Properties_of_metals,_metalloids_and_nonmetals
Pressure exerted by a vapor in thermodynamic equilibrium
by Raoult's law, it boils at a temperature below that of either pure component. There are also systems with negative deviations that have vapor pressures
Vapor_pressure
Chemical synthesis process
in depth, and the resistance drops as the carbon heats due to a negative temperature coefficient, causing the current to increase. Cool down takes weeks
Acheson_process
Taiwanese electronics manufacturer
Portfolio includes NTC (negative temperature coefficient) and PTC (positive temperature coefficient) thermistors, temperature sensor probes, varistors
Thinking_Electronic
Problem in nuclear reactor start-up
average power of the reactor stays more or less unchanged. Strong negative temperature coefficient of reactivity causes damping of these oscillations, and
Iodine_pit
Type of rechargeable battery
(NiCd), with both using nickel oxide hydroxide, NiO(OH). However, the negative electrodes use a hydrogen-absorbing alloy instead of cadmium. NiMH batteries
Nickel–metal_hydride_battery
Volcanic supereruption 74,000 years ago in Indonesia
decrease in precipitation occurs in the high emission scenario. Negative temperature anomalies return to less than 1 °C (1.8 °F) within 3 and 6 years
Youngest_Toba_eruption
Minimum energy required for a chemical reaction
decreases with temperature more rapidly than k2 increases, so that k actually decreases with temperature corresponding to a negative observed activation
Activation_energy
Regional drought index
extent and severity of drought episodes. The index uses precipitation and temperature data to study moisture supply and demand using a simple water balance
Palmer_drought_index
input impedance. Produces a very low distortion sine wave. Uses negative temperature compensation in the form of a light bulb or diode. Operational amplifiers
Operational amplifier applications
Operational_amplifier_applications
Material phase change
general rule. Helium-3 has a negative enthalpy of fusion at temperatures below 0.3 K. Helium-4 also has a very slightly negative enthalpy of fusion below
Melting
Diode that allows current to flow in the reverse direction at a specific voltage
shows a marked negative temperature coefficient. Above 5.6 volts, the avalanche effect dominates and exhibits a positive temperature coefficient. In
Zener_diode
Electronic device producing a fixed voltage
a negative temperature coefficient (i.e. it decreases with increasing temperature), and the junction voltage difference has a positive temperature coefficient
Voltage_reference
Measure of voltage induced by change of temperature
generally positive values for p doped materials and negative values for n doping. A material's temperature, crystal structure, and impurities influence the
Seebeck_coefficient
American supplier of equipment and systems for the energy industry
in operation and after shutdown and a negative temperature coefficient so that it shuts down at high temperatures. The heat sink can be to atmosphere,
Holtec_International
Device for measuring body temperature
sub-lingual temperature), under the armpit (axillary temperature), into the rectum via the anus (rectal temperature), into the ear (tympanic temperature), or
Medical_thermometer
Tendency of matter to change volume in response to a change in temperature
(39.169 °F) and then becomes negative below this temperature; this means that water has a maximum density at this temperature, and this leads to bodies of
Thermal_expansion
Device that converts electricity into heat
subcategories – negative-temperature-coefficient (NTC) and positive-temperature-coefficient (PTC) materials – based on the effect of temperature changes on
Heating_element
Second planet from the Sun
the whole planet. At the mean surface level, the atmosphere reaches a temperature of 737 K (464 °C; 867 °F) and a pressure 92 times greater than Earth's
Venus
Concept in thermodynamics
The potential temperature of a parcel of fluid at pressure P {\displaystyle P} is the temperature that the parcel would attain if adiabatically brought
Potential_temperature
Speed of sound wave through elastic medium
667 kn), or 1 km in 2.92 s or one mile in 4.69 s. It depends strongly on temperature as well as the medium through which a sound wave is propagating. At 0 °C
Speed_of_sound
Chemical compound
universities and has a large, prompt negative fuel temperature coefficient of reactivity, meaning that as the temperature of the core increases, the reactivity
Uranium_zirconium_hydride
Measure of temperature sensitivity in muscles
Values less than 1.0 indicate a negative or inverse thermal dependence, i.e., a decrease in muscle performance as temperature increases. Q10 values for biological
Q10_(temperature_coefficient)
Chemical element with atomic number 6 (C)
of organic compounds, and its unusual ability to form polymers at the temperatures commonly encountered on Earth, enables it to serve as the common element
Carbon
theory, it usually is not. The ambiguity can be solved with the terms "non-negative integers", which includes 0, and "positive integers", which does not. Natural
List_of_numbers
Temperature trends in the Common Era
The temperature record of the last 2,000 years is reconstructed using data from climate proxy records in conjunction with the modern instrumental temperature
Temperature record of the last 2,000 years
Temperature_record_of_the_last_2,000_years
Type of rechargeable battery
that the battery exhibits a very marked negative temperature coefficient. This means that as the cell temperature rises, the internal resistance falls.
Nickel–cadmium_battery
NEGATIVE TEMPERATURE
NEGATIVE TEMPERATURE
Male
Native American
Native American Sioux name CHAYTON means "falcon."
Female
Native American
Native American Sioux name WITASHNAH means "virginal."
Female
Native American
Native American Dakota name ZITKALA means "bird."
Male
Native American
Native American Algonquin name ASKOOK means "snake."
Female
Native American
Native American Hopi name YOKI means "rain."
Male
Native American
Native American Hopi name CHOOVIO means "antelope."
Girl/Female
Indian, Sikh
Demolishing Negative Energy
Male
Native American
Native American Navajo name ASHKII means "boy."
Male
Native American
Native American Algonquin name CHANSOMPS means "locust."
Male
Native American
Native American Algonquin name ABUKCHEECH means "mouse."
Female
Native American
Native American Hopi name WUTI means "woman."
Male
Native American
Native American Algonquin name ABOOKSIGUN means "wildcat."
Female
Native American
Native American Hopi name YAMKA means "blossom."
Female
Native American
Native American Sioux name WEEKO means "pretty."
Female
Native American
Native American name APONI means "butterfly."
Female
Native American
Native American Hopi name ZIHNA means "spins."
Male
Native American
Native American Algonquin name CHOGAN means "blackbird."
Male
Native American
Native American Algonquin name ACHAK means "spirit."
Female
Native American
Native American Hopi name WAKI means "shelter."
Female
Native American
Native American Algonquin name WIKIMAK means "wife."
NEGATIVE TEMPERATURE
NEGATIVE TEMPERATURE
Boy/Male
Arabic, Muslim
Successor
Boy/Male
Australian, German, Polish
Great Glory; All Glory
Surname or Lastname
English
English : patronymic from the Old English personal name Ä’adda.
Girl/Female
Indian, Kannada, Telugu
New; Youthful Woman
Girl/Female
Hindu, Indian, Tamil
Beautiful
Surname or Lastname
English
English : probably a variant of northern Irish Houston.
Biblical
helper; entry-way
Boy/Male
Tamil
Vishweshwar | விஷà¯à®µà¯‡à®·à¯à®µà®°
Lord of the universe
Girl/Female
Indian, Sanskrit, Telugu
Wealth of a State; Royal Lakshmi
Surname or Lastname
English
English : variant spelling of Wiswell.
NEGATIVE TEMPERATURE
NEGATIVE TEMPERATURE
NEGATIVE TEMPERATURE
NEGATIVE TEMPERATURE
NEGATIVE TEMPERATURE
n.
A proposition by which something is denied or forbidden; a conception or term formed by prefixing the negative particle to one which is positive; an opposite or contradictory term or conception.
a.
Having the nature of a plant; vegetable; as, vegetive life.
a.
Metalloidal; nonmetallic; -- contracted with positive or basic; as, the nitro group is negative.
adv.
In a negative manner; with or by denial.
a.
Expressing denial; belonging to negation; negative.
a.
Not positive; without affirmative statement or demonstration; indirect; consisting in the absence of something; privative; as, a negative argument; a negative morality; negative criticism.
a.
Negative; nonmetallic; acid; -- opposed to positive, metallic, or basic.
imp. & p. p.
of Negative
a.
Denying; implying, containing, or asserting denial, negation or refusal; returning the answer no to an inquiry or request; refusing assent; as, a negative answer; a negative opinion; -- opposed to affirmative.
a.
Of or pertaining to a legate; as, legatine power.
a.
Made by, proceeding from, or under the sanction of, a legate; as, a legatine constitution.
a.
Asserting absence of connection between a subject and a predicate; as, a negative proposition.
a.
Found in nature uncombined with other elements; as, native silver.
a.
Denying; renouncing; negative.
a.
Having relation or reference; referring; respecting; standing in connection; pertaining; as, arguments not relative to the subject.
n.
That side of a question which denies or refuses, or which is taken by an opposing or denying party; the relation or position of denial or opposition; as, the question was decided in the negative.
a.
Indicating or expressing relation; refering to an antecedent; as, a relative pronoun.
a.
Found in nature; not artificial; as native sodium chloride.
v. t.
To reject by vote; to refuse to enact or sanction; as, the Senate negatived the bill.
n.
The negative plate of a voltaic or electrolytic cell.