42,772 articles
Nagao Kobayashi
Nagao Kobayashi (小林 長夫) is a Japanese chemist known for his work on phthalocyanines, porphyrinoids, and magnetic circular dichroism spectroscopy, spending most of his career at Tohoku University.
Nagayoshi Iwahori
Nagayoshi Iwahori (岩堀長慶, 1926–2011) was a Japanese mathematician at the University of Tokyo whose 1964 and 1965 papers founded the theory of Iwahori–Hecke algebras in representation theory.
Nagumo model
The Nagumo model is a nonlinear reaction-diffusion partial differential equation, named after Jin-Ichi Nagumo, that models nerve impulses along an axon and the spread of genetic traits.
Nai Phuan Ong
Nai Phuan Ong is an American condensed matter physicist, the Eugene Higgins Professor at Princeton University, known for cuprate superconductor research and evidence of the chiral anomaly.
Nail Akhmediev
Nail Akhmediev (Наил Ахмедиев) is a physicist and Emeritus Professor in theoretical nonlinear optics at the Australian National University, known for Akhmediev breathers, rogue-wave theory, and dissipative solitons.
Naked singularity
A naked singularity is a gravitational singularity not hidden behind an event horizon, visible to distant observers in principle and the subject of Penrose's 1969 cosmic censorship conjecture.
Nakshatra
Nakshatra (Nakṣatras) is one of the 27 divisions of the ecliptic in traditional Indian astronomy and astrology, each a lunar mansion the Moon occupies for about a day.
Nalorphine
Nalorphine (N-allylnormorphine; also sold as Nalline and known as Lethidrone) is a semisynthetic opioid antagonist synthesized in the 1940s, used in the 1950s and 1960s to reverse opioid respiratory depression before being displaced by naloxone.
Nam-Joon Cho
Nam-Joon Cho is a materials scientist and bioengineer at Nanyang Technological University in Singapore, known for QCM-D studies of lipid membranes and membrane-targeting antiviral peptides against Zika virus.
Nambu–Goto action
The Nambu–Goto action is the classical action of a relativistic string, defined as the string tension times the area of the worldsheet the string sweeps out in spacetime.
Nambu–Jona-Lasinio model
The Nambu–Jona-Lasinio model (NJL model) is a field theory of fermions interacting through a contact four-fermion term, proposed in 1961 to explain how particle masses arise dynamically.
NAMD
NAMD (Nanoscale Molecular Dynamics) is a parallel, object-oriented molecular dynamics code for simulating large biomolecular systems, developed at the University of Illinois and distributed free of charge with source code.
Name days in Greece
A name day in Greece (onomastiki giorti) is the feast day of the saint a person is named after, celebrated in preference to the birthday.
Name days in Hungary
Name days in Hungary, called névnap, are fixed dates when bearers of a given name are greeted with 'Boldog névnapot', a custom recorded since 1542.
Name-day calendar
A name-day calendar, known in Slovakia as meniny, assigns one or more given names to each day of the year, a custom descended from the medieval Catholic calendar of saints.
Names for the number 0 in English
English has several names for the number 0: zero, the general term; oh for reading digits; nought in British use; nil for sports scores; and love in tennis.
Names of large numbers
Names of large numbers are the English words for powers of ten beyond a thousand, coined from Latin with the -illion ending, as in million, billion, and trillion.
Names of the days of the week
The names of the days of the week descend from a Roman planetary week and a biblical seven-day cycle; English substitutes Germanic gods for Roman ones.
Naming and adoption of SI derived units
The naming and adoption of SI derived units is the process by which the CGPM grants special names like newton to units built from SI base units.
Naming of chemical elements
The naming of chemical elements is the process by which a newly discovered element receives its permanent name and symbol, governed today by the IUPAC, which formalizes names after a public review period.
Naming of moons
Naming of moons, or naming of natural satellites, is the process by which newly found moons get provisional designations and permanent names approved by the IAU, arbiter since 1919.
Nanakshahi calendar
The Nanakshahi calendar (ਨਾਨਕਸ਼ਾਹੀ ਕੈਲੰਡਰ) is a tropical solar calendar used by many Sikhs to fix gurpurab dates, counting years from Guru Nanak's birth in 1469.
Nancy Grace Roman Space Telescope
The Nancy Grace Roman Space Telescope, formerly the Wide Field Infrared Survey Telescope (WFIRST), is a NASA infrared observatory launched in 2026 to study dark energy, dark matter, and exoplanets.
Nancy N. Rabalais
Nancy N. Rabalais is an American oceanographer who has mapped the Gulf of Mexico's seasonal low-oxygen dead zone every year since 1985, and is a MacArthur Fellow.
Nancy R. Sottos
Nancy R. Sottos is an American materials scientist at the University of Illinois Urbana-Champaign, known for self-healing polymers that repair cracks and reveal damage by changing color.
Nancy Reid
Nancy Reid is a Canadian statistician and University Professor at the University of Toronto, known for likelihood-based inference and higher-order asymptotics and elected to the National Academy of Sciences in 2016.
NAND logic
NAND logic is the construction of Boolean functions and circuits using only the NAND operation, "not both", which can express every other Boolean function, making it a universal gate.
Nandrolone decanoate
Nandrolone decanoate, best known as Deca-Durabolin, is a long-acting intramuscular ester of the anabolic steroid nandrolone, approved to treat the anemia of renal insufficiency and, in some countries, osteoporosis.
Nandrolone phenylpropionate
Nandrolone phenylpropionate, also called nandrolone phenpropionate or Durabolin, is a short-acting injectable ester of the anabolic steroid nandrolone, once marketed by Organon and now discontinued.
Nankai Trough
The Nankai Trough (南海トラフ) is an oceanic trench off southwest Japan where the Philippine Sea Plate subducts beneath the Eurasian plate, producing recurring magnitude-8 earthquakes.