Threshold may refer to:

In fiction:

• Threshold (Doctor Who), organization of Gallifreyan/Human origin in Doctor Who comic strips
• Threshold (fictional planet), the planet around which the ringworld Halo orbits in the video game Halo
• Threshold (comics), comic book character from Wildstorm
• Threshold (novel), a 1985 science fiction novel by David R. The Threshold are a fictional organisation who appeared in the Doctor Who Magazine comic strip based on the long-running British Science fiction television Halo is a Science fiction Video game franchise created by Bungie and owned and published by Microsoft Game Studios. Threshold, Matthew Callahan is a Fictional Supervillain from the Gen¹³ and DV8 comic books published by Wildstorm. Threshold is a Science fiction novel written by David R Palmer and published by Bantam Spectra in December 1985. Palmer
• Threshold, a 1997 fantasy novel by Sara Douglass
• Threshold, a 2001 science fiction novel by Caitlín R. Kiernan
• The Threshold Project, a plot element from Sierra's PC game Phantasmagoria 2: A Puzzle of Flesh
• "Threshold" (Stargate SG-1), episode of the science fiction television series Stargate SG-1
• Threshold (TV series), science-fiction television series that began airing in 2005 on CBS and now airs on the Sci-Fi Channel
• "Threshold" (Voyager episode), episode in Star Trek: Voyager
• Threshold (2003 film), an adaptation of the 1958 movie It! The Terror from Beyond Space (which was also adapted into the 1979 film Alien)

In music:

• Threshold (band), progressive metal band from England
• Threshold (HammerFall album), album from the band HammerFall
• Threshold House, a record label
• Threshold Records, a record label
• Threshold, a song by the band Slayer from the album God Hates Us All

In science:

• Thresholding (image processing), segmenting an image into black or white for computer vision. Threshold is a 1997 fantasy Novel by South Australian author Sara Douglass. Sara Warneke (born 2 June 1957 in Penola, South Australia) better known by her pen name Sara Douglass is an Australian Caitlín Rebekah Kiernan (born May 26, 1964 in Skerries Dublin, Ireland) is the author of many Science fiction and Dark Mythos (Aristotle In literature the plot comprises all the events in a story particularly rendered towards the achievement of some particular Artistic or Emotional Sierra Entertainment Inc is a Worldwide American Video game developer and publisher founded in 1979 by Ken and Roberta Phantasmagoria is a CD-ROM horror -themed Video game created by Sierra On-line for the DOS and Windows platforms Season five of Stargate SG-1, an American - Canadian Television series, began airing on June 29, 2001 on Threshold is a Science fiction drama television series that first aired on CBS in September 2005 " Threshold " is the 31st episode of Star Trek Voyager, the 15th episode in the second season Threshold is a 2003 Sci Fi Pictures original film adaptation of the 1958 Black and white Science fiction film It! The Terror It! The Terror from Beyond Space is a 1958 Black and white Science fiction film directed by Edward L Alien is a 1979 science fiction / Horror film directed by Ridley Scott and starring Sigourney Weaver. Threshold is a Progressive metal band formed in Surrey, UK in the late 1980s The 6th HammerFall studio album released on October 18 2006 in Europe and October 31 2006 in the United States Threshold House is one of several Record labels created by Coil to release their own work and that of affiliated projects Threshold Records was a Record label created by The Moody Blues, after their 1969 Album, On the Threshold of a Dream. God Hates Us All is the eighth studio album by the American Thrash metal band Slayer. Thresholding is the simplest method of image segmentation. From a Grayscale image thresholding can be used to create Binary images (Shapiro et
• Action potential threshold, point of the membrane potential curve at which action potential is initiated
• Lasing threshold, the minimum power level in optics at which a laser starts to operate
• Sensory threshold, one of the nine aspects of temperament in psychology

In politics:

• A electoral threshold is a portion of votes that must be attained before the candidate is truly considered; for example, a voting system with a threshold of 10% would mandate that all candidates need 10% or more to be counted on the ballot, with the left-over votes being distributed either equally or proportionately

In other fields:

• A synonym of doorstep
• Displaced threshold, runway threshold located at a point other than the physical beginning or end of the runway
• Election threshold, the minimal amount of votes necessary to win representation in an election
• Threshold RPG, text-based roleplaying MUD game

In Neurophysiology, the action potential is a self-regenerating Wave of Electrochemical activity that allows Nerve cells to carry a signal The lasing threshold is the lowest excitation level at which a laser's output is dominated by Stimulated emission rather than by Spontaneous emission. Sensory threshold is a theoretical concept used in Psychophysics. In Party-list proportional representation systems an election threshold is a clause that stipulates that a party must receive a minimum percentage of votes either A displaced threshold is a Runway Threshold located at a point other than the physical beginning or end of the runway In Party-list proportional representation systems an election threshold is a clause that stipulates that a party must receive a minimum percentage of votes either Threshold RPG, or Threshold, is an Online text-based role-playing game using a MUD style interface

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