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In the field of databases in computer science, a

**transaction log**(also transaction journal, database**log**, binary**log**or audit trail) is a history of actions executed by a database management system used to guarantee ACID properties over crashes or hardware failures.A

**chip log**, also called common**log**, ship**log**, or just**log**, is a navigation tool mariners use to estimate the speed of a vessel through water. The word knot, to mean nautical mile per hour, derives from this measurement method.In science and engineering, a

**log**–**log**graph or**log–log plot**is a two-dimensional graph of numerical data that uses logarithmic scales on both the horizontal and vertical axes. Monomials – relationships of the form y = a x k {\displaystyle y=ax^{k}} – appear as straight lines in a**log**–**log**graph, with the power term corresponding to the ...A

**logarithmic scale**(or**log**scale) is a way of displaying numerical data over a very wide range of values in a compact way—typically the largest numbers in the data are hundreds or even thousands of times larger than the smallest numbers.**Log reduction**is a measure of how thoroughly a decontamination process reduces the concentration of a contaminant.It is defined as the common logarithm of the ratio of the levels of contamination before and after the process, so an increment of 1 corresponds to a reduction in concentration by a factor of 10.The multiple valued version of

**log**(z) is a set, but it is easier to write it without braces and using it in formulas follows obvious rules.**log**(z) is the set of complex numbers v which satisfy e v = z arg(z) is the set of possible values of the arg function applied to z. When k is any integer:An

**issue log**is a documentation element of software project management that contains a list of ongoing and closed issues of the project. While issue logs can be viewed as a way to track errors in the project, the role it plays often extends further.Definition. If p is a probability, then p/(1 − p) is the corresponding odds; the

**logit**of the probability is the logarithm of the odds, i.e. = = = (). The base of the logarithm function used is of little importance in the present article, as long as it is greater than 1, but the natural logarithm with base e is the one most often used.