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61Mathematical modelling in epidemiology — It is possible to mathematically model the progress of most infectious diseases to discover the likely outcome of an epidemic or to help manage them by vaccination. This article uses some basic assumptions and some simple mathematics to find… …
62Mace (spray) — Mace is a tear gas in the form of an aerosol spray which propels a lachrymatory agent mixed with a volatile solvent. It is sometimes used as a self defense device. This form of Mace is legal in very few countries, thus its use is becoming… …
63Ha-ha — The ha ha or Piece of pie is a type of boundary to a garden, pleasure ground, or park, designed not to interrupt the view and to be invisible until closely approached. The ha ha consists of a trench, the inner side of which is vertical and faced… …
64Homologous recombination — Figure 1. During meiosis, homologous recombination can produce new combinations of genes as shown here between similar but not identical copies of human chromosome 1. Homologous recombination is a type of genetic recombination in which nucleotide …
65PKP class SM30 — Infobox Locomotive Auto name = SM30 powertype = Diesel electric caption = Class SM30 or SP30 locomotive builder = Fablok serialnumber = buildmodel = Ls300 builddate = 1957 1970 totalproduction = ca. 900 whytetype = aarwheels = uicclass = Bo Bo… …
66Gene — For a non technical introduction to the topic, see Introduction to genetics. For other uses, see Gene (disambiguation). This stylistic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). The… …
67Chapeltoun — Coordinates: 55°39′56″N 4°33′17″W / 55.66557°N 4.55484°W / 55.66557; 4.55484 …
68PKP class SM02 — Infobox Locomotive name = SM02/Ls40 powertype = Diesel caption = Ls40 5438 locomotive in Kościerzyna Railroad Heritage Park builder = flagicon|POL Fablok serialnumber = buildmodel = Ls40 builddate = 1952 1961 totalproduction = 581 aarwheels = B… …
69PKP class SM15 — Infobox Locomotive name = SM15 powertype = Diesel caption = SM15 17 at the Warsaw Railway Museum. builder = flagicon|USSR Lyudinovo flagicon|POL Fablok serialnumber = buildmodel = ТГМ3 12D builddate = 1963 1966 totalproduction = 56 aarwheels = Bo …
70Waulsort — La rue de l’église …
