CGS-EMU system
E621092
The CGS-EMU system is a variant of the centimeter–gram–second (CGS) system of units that uses the electromagnetic (EMU) subsystem for electrical and magnetic quantities, including the gauss as a unit of magnetic flux density.
All labels observed (2)
| Label | Occurrences |
|---|---|
| CGS-EMU | 1 |
| CGS-EMU system canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6833422 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: CGS-EMU system Context triple: [gauss, isPartOf, CGS-EMU system]
-
A.
Siemens ACS-64
The Siemens ACS-64 is a high-speed, electric locomotive used by Amtrak for passenger rail service in the United States.
-
B.
Comeng EMU
The Comeng EMU is a long-serving class of electric multiple unit trains used on Melbourne's suburban rail network.
-
C.
Siemens Trainguard MT
Siemens Trainguard MT is a communications-based train control (CBTC) signaling system developed by Siemens for fully automated and driverless metro and urban rail operations.
-
D.
Civia EMU
Civia EMU is a class of electric multiple unit commuter trains used by Spain’s Renfe for suburban and regional passenger services.
-
E.
Alstom Eurotram
The Alstom Eurotram is a distinctive low-floor light rail vehicle known for its sleek, modern design and panoramic windows, widely used on urban tram networks in Europe.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: CGS-EMU system Target entity description: The CGS-EMU system is a variant of the centimeter–gram–second (CGS) system of units that uses the electromagnetic (EMU) subsystem for electrical and magnetic quantities, including the gauss as a unit of magnetic flux density.
-
A.
Siemens ACS-64
The Siemens ACS-64 is a high-speed, electric locomotive used by Amtrak for passenger rail service in the United States.
-
B.
Comeng EMU
The Comeng EMU is a long-serving class of electric multiple unit trains used on Melbourne's suburban rail network.
-
C.
Siemens Trainguard MT
Siemens Trainguard MT is a communications-based train control (CBTC) signaling system developed by Siemens for fully automated and driverless metro and urban rail operations.
-
D.
Civia EMU
Civia EMU is a class of electric multiple unit commuter trains used by Spain’s Renfe for suburban and regional passenger services.
-
E.
Alstom Eurotram
The Alstom Eurotram is a distinctive low-floor light rail vehicle known for its sleek, modern design and panoramic windows, widely used on urban tram networks in Europe.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
system of units
ⓘ
variant of the CGS system ⓘ |
| appliesTo |
electrical quantities
ⓘ
magnetic quantities ⓘ |
| basedOn | centimeter–gram–second system of units NERFINISHED ⓘ |
| category |
electromagnetic unit systems
ⓘ
non-SI unit systems ⓘ |
| contrastedWith |
CGS-ESU system
NERFINISHED
ⓘ
SI system of units NERFINISHED ⓘ |
| definesUnitFor |
electric current
ⓘ
electric potential ⓘ electrical resistance ⓘ magnetic field strength ⓘ magnetic flux ⓘ magnetic flux density ⓘ |
| fieldOfUse |
classical electromagnetism
ⓘ
historical metrology ⓘ theoretical physics ⓘ |
| hasAbbreviation |
CGS-EMU
NERFINISHED
ⓘ
EMU-CGS NERFINISHED ⓘ |
| hasSubsystem | electromagnetic units (EMU) ⓘ |
| historicalStatus | largely superseded by SI ⓘ |
| partOf | CGS family of unit systems ⓘ |
| relatedTo |
Gaussian unit system
NERFINISHED
ⓘ
Heaviside–Lorentz units NERFINISHED ⓘ |
| usesBaseUnit |
centimeter
ⓘ
gram ⓘ second ⓘ |
| usesCoherentUnit |
abampere
ⓘ
abohm ⓘ abvolt ⓘ gauss ⓘ maxwell ⓘ oersted ⓘ |
| usesDimensionSystem | CGS dimensions ⓘ |
| usesLengthUnitSymbol | cm ⓘ |
| usesMassUnitSymbol | g ⓘ |
| usesSubsystem | electromagnetic (EMU) subsystem ⓘ |
| usesTimeUnitSymbol | s ⓘ |
| usesUnit | gauss ⓘ |
| usesUnitNamePattern | ab- prefix for electromagnetic units ⓘ |
| usesVacuumConstantsConvention |
dimensionless permeability of free space
ⓘ
dimensionless permittivity of free space ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: CGS-EMU system Description of subject: The CGS-EMU system is a variant of the centimeter–gram–second (CGS) system of units that uses the electromagnetic (EMU) subsystem for electrical and magnetic quantities, including the gauss as a unit of magnetic flux density.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
oersted
this entity surface form:
CGS-EMU