diffusion+block

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• Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …   Wikipedia

• Block cipher — In cryptography, a block cipher is a symmetric key cipher operating on fixed length groups of bits, called blocks, with an unvarying transformation. A block cipher encryption algorithm might take (for example) a 128 bit block of plaintext as… …   Wikipedia

• block — 1. To obstruct; to arrest passage through. 2. A condition in which the passage of an electrical impulse is arrested, wholly or in part, temporarily or permanently. 3. SYN: atrioventricular b.. [Fr. bloquer] alveolocapillary b. the presence of… …   Medical dictionary

• Diffusion-limited aggregation — A DLA cluster grown from a copper sulfate solution in an electrodeposition cell Diffusion limited aggregation (DLA) is the process whereby particles undergoing a random walk due to Brownian motion cluster together to form aggregates of such… …   Wikipedia

• Surface diffusion — [ adatom diffusing across a square surface lattice. Note the frequency of vibration of the adatom is greater than the jump rate to nearby sites. Also, the model displays examples of both nearest neighbor jumps (straight) and next nearest neighbor …   Wikipedia

• Randomized block design — In the statistical theory of the design of experiments, blocking is the arranging of experimental units in groups (blocks) that are similar to one another. Typically, a blocking factor is a source of variability that is not of primary interest to …   Wikipedia

• Nerve block — Intervention ICD 9 CM 04.81 MeSH …   Wikipedia

• alveolar-capillary block — interference in the normal diffusion of gases across the membrane between the alveolar spaces and the pulmonary capillaries …   Medical dictionary

• Espresso machine — An espresso machine is used to produce the traditional Italian coffee beverage called espresso.Generally, espresso is produced by forcing 90°C (200°F) water through 7 10 grams of finely ground coffee, which has been compressed with approximately… …   Wikipedia

• Faema — (Italian acronym: Fabbrica Apparecchiature Elettromeccaniche e Affini) primarily engaged in the production of espresso machines, was founded in 1945 by Carlo Ernesto Valente, in Milan, Italy. Faema was to become synonymous with the postwar… …   Wikipedia

• oxidation–reduction reaction — ▪ chemical reaction Introduction also called  redox reaction        any chemical reaction in which the oxidation number of a participating chemical species changes. The term covers a large and diverse body of processes. Many oxidation– reduction… …   Universalium