1, The full form of SEM is Search Engine Marketing. It’s used on Computing ,Internet in Worldwide

Search engine marketing, or SEM, is one of the most effective ways to grow your business in an increasingly competitive marketplace. With millions of businesses out there all vying for the same eyeballs, it’s never been more important to advertise online, and search engine marketing is the most effective way to promote your products and grow your business.

Search engine optimization (SEO) is the process of improving the quality and quantity of website traffic to a website or a web page from search engines. SEO targets unpaid traffic (known as “natural” or “organic” results) rather than direct traffic or paid traffic. Unpaid traffic may originate from different kinds of searches, including image search, video search, academic search, news search, and industry-specific vertical search engines.

As an Internet marketing strategy, SEO considers how search engines work, the computer-programmed algorithms that dictate search engine behavior, what people search for, the actual search terms or keywords typed into search engines, and which search engines are preferred by their targeted audience. SEO is performed because a website will receive more visitors from a search engine when websites rank higher on the search engine results page (SERP). These visitors can then potentially be converted into customers

2, The full form of SEM is Semester. It’s used on Academic & Science ,Universities & Institutions in Worldwide

An academic term (or simply term) is a portion of an academic year, the time during which an educational institution holds classes. The schedules adopted vary widely. it from the Latin “semestris” meaning “six-months” .

In most countries, the academic year begins in late summer or early autumn and ends during the following spring or summer. In Northern Hemisphere countries, this means that the academic year lasts from August, September, or October to May, June, or July. In Southern Hemisphere countries, the academic year aligns with the calendar year, lasting from February or March to November or December. The summer may or may not be part of the term system.

3, The full form of SEM is Scanning Electron Microscope. It’s used on Technology ,General in Worldwide

The scanning electron microscope (SEM) uses a focused beam of high-energy electrons to generate a variety of signals at the surface of solid specimens. The signals that derive from electron-sample interactions reveal information about the sample including external morphology (texture), chemical composition, and crystalline structure and orientation of materials making up the sample. In most applications, data are collected over a selected area of the surface of the sample, and a 2-dimensional image is generated that displays spatial variations in these properties. Areas ranging from approximately 1 cm to 5 microns in width can be imaged in a scanning mode using conventional SEM techniques (magnification ranging from 20X to approximately 30,000X, spatial resolution of 50 to 100 nm). The SEM is also capable of performing analyses of selected point locations on the sample; this approach is especially useful in qualitatively or semi-quantitatively determining chemical compositions (using EDS), crystalline structure, and crystal orientations (using EBSD). The design and function of the SEM is very similar to the EPMA and considerable overlap in capabilities exists between the two instruments.

Accelerated electrons in an SEM carry significant amounts of kinetic energy, and this energy is dissipated as a variety of signals produced by electron-sample interactions when the incident electrons are decelerated in the solid sample. These signals include secondary electrons (that produce SEM images), backscattered electrons (BSE), diffracted backscattered electrons (EBSD that are used to determine crystal structures and orientations of minerals), photons (characteristic X-rays that are used for elemental analysis and continuum X-rays), visible light (cathodoluminescence–CL), and heat. Secondary electrons and backscattered electrons are commonly used for imaging samples: secondary electrons are most valuable for showing morphology and topography on samples and backscattered electrons are most valuable for illustrating contrasts in composition in multiphase samples (i.e. for rapid phase discrimination). X-ray generation is produced by inelastic collisions of the incident electrons with electrons in discrete ortitals (shells) of atoms in the sample. As the excited electrons return to lower energy states, they yield X-rays that are of a fixed wavelength (that is related to the difference in energy levels of electrons in different shells for a given element). Thus, characteristic X-rays are produced for each element in a mineral that is “excited” by the electron beam. SEM analysis is considered to be “non-destructive”; that is, x-rays generated by electron interactions do not lead to volume loss of the sample, so it is possible to analyze the same materials repeatedly.

4, The full form of SEM is Society for Ethnomusicology. It’s used on Associations & Organizations ,Arts Associations in United States

SEM is a U.S.-based organization with an international membership of over 1800 individuals dedicated to the study of all forms of music from diverse humanistic and social scientific perspectives.

The Society for Ethnomusicology was founded in 1955 to promote the research, study, and performance of music in all historical periods and cultural contexts.

The Society for Ethnomusicology is a U.S.-based organization with an international membership of approximately 1,800 individuals dedicated to the study of all forms of music from diverse humanistic and social scientific perspectives. As a network of scholars, educators, students, musicians, activists, curators, and other professionals that reaches across countries, disciplines, and institutions, SEM serves as an inclusive forum for the exchange of knowledge about the world’s music and for advocacy on behalf of musicians and their communities.

• The SEM Annual Meeting is held each fall, attracts over 900 participants, and features more than 350 scholarly presentations, roundtables, films, workshops, and concerts.
• The SEM Journal, Ethnomusicology, is published three times a year and is the leading periodical in the field. The journal is distributed to members and to approximately 800 institutional subscribers.
• SEM’s Online Publications include the SEM Newsletter, SEM Student News, Ethnomusicology Translations, the blog Sound Matters, the podcast Ethnomusicology Today, and various electronic forums.
• SEM awards a variety of Prizes each year in recognition of outstanding work in ethnomusicology.
• SEM includes 32 Sections and Special Interest Groups focused on particular topics in ethnomusicology and 10 Regional Chapters in North America.

SEM has been an active member of the American Council of Learned Societies since 1966 and collaborates with various other national and international organizations.

The SEM Business Office is located on the campus of Indiana University Bloomington and gratefully acknowledges this institution’s support.