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  2. Search engine marketing - Wikipedia

    en.wikipedia.org/wiki/Search_engine_marketing

    Managing search campaigns is either done directly with the SEM vendor or through an SEM tool provider. It may also be self-serve or through an advertising agency. Search engine marketing is also a method of business analytics, which is mainly aimed at providing useful information for organizations to find business opportunities and generate ...

  3. Scanning electron microscope - Wikipedia

    en.wikipedia.org/wiki/Scanning_electron_microscope

    Image of pollen grains taken on a SEM shows the characteristic depth of field of SEM micrographs M. von Ardenne's first SEM SEM with opened sample chamber Analog type SEM. A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons.

  4. Structural equation modeling - Wikipedia

    en.wikipedia.org/wiki/Structural_equation_modeling

    Structural equation modeling (SEM) is a diverse set of methods used by scientists for both observational and experimental research. SEM is used mostly in the social and behavioral science fields, but it is also used in epidemiology, [2] business, [3] and other fields. A common definition of SEM is, "...a class of methodologies that seeks to ...

  5. Standard error - Wikipedia

    en.wikipedia.org/wiki/Standard_error

    Small samples are somewhat more likely to underestimate the population standard deviation and have a mean that differs from the true population mean, and the Student t-distribution accounts for the probability of these events with somewhat heavier tails compared to a Gaussian.

  6. SEM - Wikipedia

    en.wikipedia.org/wiki/SEM

    Shem or Sem, one of the sons of Noah, as depicted in the Bible; Sem (given name), a usually masculine given name; Sem (artist) (1863–1934), French caricaturist; Elise Sem (1870–1950), Norwegian barrister, women's activist, and sports official; Ingebjørg Dahl Sem (born 1938), Norwegian Christian writer; Ingebjørg Sem (1931–2009 ...

  7. Environmental scanning electron microscope - Wikipedia

    en.wikipedia.org/wiki/Environmental_scanning...

    The environmental scanning electron microscope (ESEM) is a scanning electron microscope (SEM) that allows for the option of collecting electron micrographs of specimens that are wet, uncoated, or both by allowing for a gaseous environment in the specimen chamber.

  8. Security event management - Wikipedia

    en.wikipedia.org/wiki/Security_event_management

    Security event management (SEM), and the related SIM and SIEM, are computer security disciplines that use data inspection tools to centralize the storage and interpretation of logs or events generated by other software running on a network.

  9. Strategic energy management - Wikipedia

    en.wikipedia.org/wiki/Strategic_Energy_Management

    The main goal of SEM is to help a company achieve continuous improvement in its energy performance over a longer-term period. Some energy benefits of SEM include reduced energy consumption through improved energy efficiency and energy conservation, improved peak demand management and reduced demand charges, decreased overall energy cost, reduced energy costs, greenhouse gas (GHG) emissions and ...