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  2. Scanning electron microscope - Wikipedia

    en.wikipedia.org/wiki/Scanning_electron_microscope

    An account of the early history of scanning electron microscopy has been presented by McMullan. [2] [3] Although Max Knoll produced a photo with a 50 mm object-field-width showing channeling contrast by the use of an electron beam scanner, [4] it was Manfred von Ardenne who in 1937 invented [5] a microscope with high resolution by scanning a very small raster with a demagnified and finely ...

  3. Online advertising - Wikipedia

    en.wikipedia.org/wiki/Online_advertising

    Online advertising includes email marketing, search engine marketing (SEM), social media marketing, many types of display advertising (including web banner advertising), and mobile advertising. Advertisements are increasingly being delivered via automated software systems operating across multiple websites, media services and platforms, known ...

  4. Surface-conduction electron-emitter display - Wikipedia

    en.wikipedia.org/wiki/Surface-conduction...

    Canon began SED research in 1986. [5] Their early research used PdO electrodes without the carbon films on top, but controlling the slit width proved difficult. At the time there were a number of flat-screen technologies in early development, and the only one close to commercialization was the plasma display panel (PDP), which had numerous disadvantages – manufacturing cost and energy use ...

  5. 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 ...

  6. Environmental scanning electron microscope - Wikipedia

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

    The signal thus picked up by the anode is further amplified and processed to modulate a display screen and form an image as in SEM. Notably, in this design and the associated gaseous electron amplification, the product p·d is an independent parameter, so that there is a wide range of values of pressure and electrode geometry which can be ...

  7. Scanning transmission electron microscopy - Wikipedia

    en.wikipedia.org/wiki/Scanning_transmission...

    The first STEM was built in 1938 by Baron Manfred von Ardenne, [2] [3] working in Berlin for Siemens.However, at the time the results were inferior to those of transmission electron microscopy, and von Ardenne only spent two years working on the problem.

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  9. Scanning confocal electron microscopy - Wikipedia

    en.wikipedia.org/wiki/Scanning_confocal_electron...

    High energies of incident particles (200 keV electrons vs. 2 eV photons) result in much higher spatial resolution of SCEM as compared to SCOM (lateral resolution <1 nm vs. >400 nm). As compared to conventional electron microscopy ( TEM , STEM , SEM ), SCEM offers 3-dimensional imaging. 3D imaging in SCEM was expected from the confocal geometry ...