Technology and the built world

Erik K. Antonsson

Erik K. Antonsson is a mechanical engineer and Caltech professor emeritus known for formal methods for engineering design, including the Method of Imprecision, and served as JPL Chief Technologist.

Erik Schlangen is a Dutch civil engineer and professor of Experimental Micromechanics at TU Delft, known for the Delft lattice fracture model and for pioneering self-healing asphalt and bacteria-based concrete.

Erik Voorhees

Erik Voorhees is an American entrepreneur and one of bitcoin's earliest advocates, known for founding SatoshiDICE, the ShapeShift cryptocurrency exchange, and the privacy-focused AI platform Venice.ai.

Erik Winfree

Erik Winfree is a computer scientist and bioengineer at Caltech, known for algorithmic self-assembly of DNA, DNA strand displacement circuits, and a 2000 MacArthur Fellowship.

Erkan Aydın

Erkan Aydın is a photovoltaics scientist who leads a research group at LMU Munich, known for a certified 32.5% perovskite/silicon tandem efficiency reported in 2023.

Erlang (programming language)

Erlang is a concurrent, fault-tolerant functional programming language created at Ericsson's lab in Stockholm, originally for telephone exchanges with at most four minutes of downtime per year.

Erlang (unit)

The erlang (symbol E) is the dimensionless unit of telecommunications traffic intensity, named for Danish mathematician Agner Krarup Erlang and equal to one circuit busy for one hour.

Erlang B

Erlang B, also called the Erlang loss formula, is a teletraffic formula published in 1917 that calculates the probability a call is blocked when no circuits are free.

Erlang C

Erlang C is a queuing formula, derived by Agner Krarup Erlang in 1917, that gives the probability a caller must wait and is used for call center staffing.

Erlang/OTP

Erlang/OTP is Ericsson's development environment for concurrent programming, combining the Erlang language and runtime with OTP libraries for fault-tolerant distributed applications like RabbitMQ and WhatsApp.

Ernest Edwin Sechler

Ernest Edwin Sechler (1905–1979) was an American aerospace engineer and Caltech professor of aeronautics whose thin-shell buckling research shaped airplane fuselages, missiles, booster rockets, and the Palomar telescope shell.

Ernest G. Cravalho

Ernest G. Cravalho (1939–2021) was an American mechanical engineer who spent 44 years on the MIT faculty and helped establish cryopreservation and biomedical heat transfer as research fields.

Ernest George Coker

Ernest George Coker (1869–1946) was an English engineer who turned photo-elasticity, measuring stress in structures by polarized light, into a practical method, teaching at McGill and University College London.

Ernest Hemingway House

The Ernest Hemingway House, also called the Ernest Hemingway Home and Museum, is a historic house museum at 907 Whitehead Street in Key West, Florida.

Ernest T. Smerdon

Ernest T. Smerdon (1930–2014) was an American water-resources engineer and dean of engineering at the University of Arizona, elected to the National Academy of Engineering in 1986.

Ernest Thiele

Ernest Thiele (1895–1993) was an American chemical engineer who spent 35 years at Standard Oil of Indiana and is remembered for the Thiele modulus and the McCabe–Thiele method for designing distillation columns.

Ernesto Joselevich

Ernesto Joselevich is an Israeli materials scientist and Drake Family Professor of Nanotechnology at the Weizmann Institute, known for guided growth of nanowires and self-organized carbon nanotube serpentines.

Erneuerbare-Energien-Gesetz

The Erneuerbare-Energien-Gesetz (EEG) is Germany's Renewable Energy Sources Act, first enacted in 2000, which supports wind, solar, biomass, and other renewable electricity through feed-in tariffs and auctions.

ERNIE (robot)

ERNIE is a planar five-link, electrically powered bipedal robot testbed developed at Ohio State University for research on dynamic walking, best known for studying parallel knee compliance.

ERNIE (文心) (model family)

ERNIE (文心), or Enhanced Representation through kNowledge IntEgration, is Baidu's family of large language models, begun in 2019 for Chinese text and now powering Ernie Bot, with open-weight ERNIE 4.5 released in 2025.

ERNIE 4.5 open-weight release

Baidu's June 30, 2025 open-weight release of ten ERNIE 4.5 multimodal models, 0.3B to 424B parameters, on Hugging Face under the permissive Apache License 2.0.

Ernie Bot

Ernie Bot (Chinese: Wenxin Yiyan, 文心一言) is an AI chatbot developed by Baidu, introduced in March 2023 and opened to the Chinese public in August 2023.

ERNIE-Image

ERNIE-Image is an open-weights text-to-image generation model developed by Baidu, released in April 2026 and built on a single-stream Diffusion Transformer with 8 billion parameters.

Ernst Alexanderson

Ernst Alexanderson, born Ernst Frederik Werner Alexanderson, was a Swedish-born American electrical engineer at General Electric whose high-frequency alternator made radio transmission practical; he held over 300 US patents.

Ernst Guillemin

Ernst Adolph Guillemin (1898–1970) was an American electrical engineer and educator at MIT, generally considered the founding father of circuit theory education and author of six sole-authored textbooks.

Ernst Litfaß

Ernst Litfaß, full name Ernst Theodor Amandus Litfaß (1816–1874), was a German printer and publisher in Berlin who introduced the Litfaßsäule, the cylindrical advertising pillar, in 1855.

Ernst Udet

Ernst Udet (1896-1941) was a German fighter pilot who scored 62 victories in World War I, second only to Manfred von Richthofen, and later oversaw Luftwaffe technical development.

Ernst Weber (electrical engineer)

Ernst Weber (1901–1996) was an Austrian-born American electrical engineer who founded Polytechnic's Microwave Research Institute and served as the first president of the IEEE in 1963.