42,772 articles
Donald W. Peaceman
Donald W. Peaceman (1926–2017) was an American chemical engineer at Humble Oil and Exxon in Houston who pioneered petroleum reservoir simulation and created the Peaceman well model.
Donald William Kerst
Donald William Kerst (1911–1993) was an American physicist who invented the betatron, the first magnetic induction electron accelerator, producing 2.3-MeV electrons at Illinois in 1940.
Donald Zilversmit
Donald Zilversmit (1919–2010) was a Dutch-born American nutritional biochemist, a Cornell University professor who showed how plasma cholesterol drives atherosclerosis and discovered the cholesteryl ester transfer protein.
Donaldson–Thomas invariants
Donaldson–Thomas invariants are enumerative invariants of a Calabi–Yau threefold that count stable sheaves or curves, introduced by Richard Thomas in 2000 as a holomorphic analog of the Casson invariant.
Dong Ki Yoon
Dong Ki Yoon (윤동기) is a South Korean chemist and Endowed Chair Professor at KAIST who turns self-assembled liquid-crystal textures into lithographic templates and security devices.
Dong Lai
Dong Lai (赖东) is a theoretical astrophysicist known for work on neutron stars, black holes, and misaligned hot Jupiters; a Cornell professor until 2025, he now leads astrophysics at the Tsung-Dao Lee Institute in Shanghai.
Donghai Wang
Donghai Wang is a battery researcher who holds the Brown Foundation Chair of Mechanical Engineering at Southern Methodist University, where he joined in 2024 after 15 years at Penn State.
Dongho Kim
Dongho Kim (김동호) is a South Korean physical chemist at Yonsei University in Seoul, known for time-resolved and single-molecule spectroscopy of quantum dots and perovskites; he received the Porter Medal in 2024.
Donglin Jiang
Donglin Jiang is a materials chemist, Professor and Provost's Chair in Chemistry at the National University of Singapore since 2018, recognized as a pioneer of two-dimensional polymers and covalent organic frameworks.
Dongping Zhong
Dongping Zhong (仲冬平) is a chemical physicist who uses femtosecond spectroscopy to watch DNA repair by photolyase and water motion around proteins, long at Ohio State.
Dongxiao Don Zhang
Dongxiao Don Zhang is a Chinese-American hydrologist and engineer known for stochastic modeling of flow in porous media, elected to the U.S. National Academy of Engineering in 2017.
Dongzhi Festival
The Dongzhi Festival (冬至) is a traditional Chinese festival at the winter solstice, dating to the Han dynasty and marked by family reunion, ancestor worship, and tangyuan or dumplings.
Donna Blackmond
Donna G. Blackmond is an American and British chemical engineer and kineticist at Scripps Research, known for reaction progress kinetic analysis and the origin of biological homochirality.
Donna Strickland
Donna Theo Strickland, born 1959 in Guelph, Ontario, is a Canadian physicist who co-invented chirped pulse amplification and shared the 2018 Nobel Prize in Physics.
Donnan equilibrium
Donnan equilibrium, or Gibbs–Donnan equilibrium, is the unequal distribution of ions across a membrane that one charged species cannot cross, producing a membrane potential and osmotic pressure difference.
Donnel F. Hewett
Donnel F. Hewett was an American economic geologist who served the US Geological Survey for 59 years, discovered the world's largest vanadium deposit in Peru in 1906, and was nicknamed "Mr. Manganese".
Donor nuclear-spin qubits in silicon
Donor nuclear-spin qubits in silicon are quantum bits encoded in the nuclear spin of donor atoms like phosphorus or antimony, combining record coherence times with semiconductor manufacturing.
Donor qubit
A donor qubit is a quantum bit encoded in the spin of an impurity atom, typically phosphorus-31 in purified silicon-28, with coherence times among the longest in solid-state qubits.
Donor/acceptor carbene C–H functionalization
Donor/acceptor carbene C–H functionalization is a method for converting carbon–hydrogen bonds into carbon–carbon bonds using chemoselective rhodium carbenes, enabling site-selective, stereoselective synthesis without directing groups.
Donor/acceptor carbene cyclopropanation
Donor/acceptor carbene cyclopropanation converts alkenes into cyclopropanes using metal carbenes bearing one electron-donating and one electron-withdrawing group, usually generated from diazo compounds under dirhodium catalysis.
Donsker's theorem
Donsker's theorem, also called the functional central limit theorem, states that rescaled partial-sum processes of random walks converge in distribution to Brownian motion, proved by Monroe Donsker in 1951.
Doob decomposition theorem
The Doob decomposition theorem states that any discrete-time stochastic process splits uniquely into a martingale and a predictable process, a result Joseph Doob published in 1953.
Doob–Meyer decomposition theorem
The Doob–Meyer decomposition theorem, the continuous-time extension of Doob's 1953 decomposition, states a class D submartingale is uniquely a martingale plus a predictable increasing process.
Doob's martingale convergence theorems
Doob's martingale convergence theorems are results in probability theory, due to Joseph Doob, giving conditions under which a martingale converges almost surely or in L¹.
Doob's martingale inequality
Doob's martingale inequality is a result in probability theory, named after Joseph L. Doob, bounding the running maximum of a martingale by its final value.
Doomsday rule
The Doomsday rule, or Doomsday algorithm, is a mental-calculation method devised by British mathematician John Horton Conway in 1973 that gives the weekday for any Gregorian calendar date.
Doorman fallacy
The doorman fallacy is a reasoning error that judges automation against a role's most visible task while ignoring its other functions. It was coined by Rory Sutherland.
Dopamine
Dopamine is a catecholamine neurotransmitter and chemical messenger in the brain and sympathetic nervous system, and the precursor of norepinephrine and epinephrine; its loss causes Parkinson's disease.
DOPC
DOPC, also called dioleoyl lecithin, is a synthetic phosphatidylcholine lipid whose two oleoyl chains keep its bilayers fluid at room temperature, making it a standard model membrane lipid.
Doppler broadening
Doppler broadening is the widening of a spectral line caused by thermal motion of the emitting or absorbing atoms, one of the two principal line-broadening causes.