Class information for:
Level 1: LNE SYRTE//INNOVAT SPACE TIME PROJECT//HORLOGE ATOM

Basic class information
ID Publications Average number
of references		 Avg. shr. active
ref. in WoS
5164 1594 26.1 68%


Bar chart of Publication_year

Last years might be incomplete

Classes in level above (level 2)


ID, lev.
above		 Publications Label for level above
839 11153 ELECTROMAGNETICALLY INDUCED TRANSPARENCY//SPONTANEOUSLY GENERATED COHERENCE//TIME FREQUENCY

Terms with highest relevance score


Rank Term Type of term Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 LNE SYRTE Address 18 34% 3% 45
2 INNOVAT SPACE TIME PROJECT Address 18 83% 1% 10
3 HORLOGE ATOM Address 14 65% 1% 13
4 METROL TIME SPACE Address 13 69% 1% 11
5 CESIUM BEAM FREQUENCY STANDARD Author keyword 11 100% 0% 6
6 METROL ESSAIS SYST REFERENCES TEMPS ES Address 11 78% 0% 7
7 TIME FREQUENCY Address 9 15% 4% 59
8 ATOMIC FOUNTAIN Author keyword 9 55% 1% 11
9 OPTICAL FREQUENCY STANDARD Author keyword 8 30% 1% 22
10 ATOMIC CLOCKS Author keyword 7 23% 2% 28

Web of Science journal categories

Author Key Words


Rank Web of Science journal category Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class		 LCSH search Wikipedia search
1 CESIUM BEAM FREQUENCY STANDARD 11 100% 0% 6 Search CESIUM+BEAM+FREQUENCY+STANDARD Search CESIUM+BEAM+FREQUENCY+STANDARD
2 ATOMIC FOUNTAIN 9 55% 1% 11 Search ATOMIC+FOUNTAIN Search ATOMIC+FOUNTAIN
3 OPTICAL FREQUENCY STANDARD 8 30% 1% 22 Search OPTICAL+FREQUENCY+STANDARD Search OPTICAL+FREQUENCY+STANDARD
4 ATOMIC CLOCKS 7 23% 2% 28 Search ATOMIC+CLOCKS Search ATOMIC+CLOCKS
5 OPTICAL FREQUENCY STANDARDS 6 36% 1% 13 Search OPTICAL+FREQUENCY+STANDARDS Search OPTICAL+FREQUENCY+STANDARDS
6 ATOMIC CLOCK 6 18% 2% 29 Search ATOMIC+CLOCK Search ATOMIC+CLOCK
7 INTERCOMBINATION TRANSITION 4 67% 0% 4 Search INTERCOMBINATION+TRANSITION Search INTERCOMBINATION+TRANSITION
8 OPTICAL ATOMIC CLOCKS 4 67% 0% 4 Search OPTICAL+ATOMIC+CLOCKS Search OPTICAL+ATOMIC+CLOCKS
9 OPTICAL CLOCK 4 28% 1% 13 Search OPTICAL+CLOCK Search OPTICAL+CLOCK
10 CESIUM FREQUENCY STANDARD 4 75% 0% 3 Search CESIUM+FREQUENCY+STANDARD Search CESIUM+FREQUENCY+STANDARD

Key Words Plus


Rank Web of Science journal category Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 LATTICE CLOCK 69 64% 4% 67
2 OPTICAL LATTICE CLOCK 29 66% 2% 27
3 CESIUM FOUNTAIN 25 77% 1% 17
4 PRIMARY FREQUENCY STANDARD 25 75% 1% 18
5 NIST F1 23 70% 1% 19
6 ATOMIC FOUNTAIN 23 55% 2% 29
7 LASER STABILIZATION 23 74% 1% 17
8 REFERENCE CAVITY 21 64% 1% 21
9 DISTRIBUTED CAVITY PHASE 19 71% 1% 15
10 FREQUENCY TRANSFER 18 61% 1% 19

Journals

Reviews


Title Publ. year Cit. Active references % act. ref.
to same field
Optical lattice clocks and quantum metrology 2011 69 93 71%
Atomic fountain clocks 2005 135 71 70%
Remote transfer of ultrastable frequency references via fiber networks 2007 130 120 32%
Quantum state engineering and precision metrology using state-insensitive light traps 2008 138 59 39%
Limits to time variation of fundamental constants from comparisons of atomic frequency standards 2007 56 132 53%
Standards of time and frequency at the outset of the 21st century 2004 119 31 29%
Invited Review Article: The uncertainty in the realization and dissemination of the SI second from a systems point of view 2012 8 22 73%
Optical frequency standards and clocks 2010 14 113 60%
Optical lattice clocks 2009 13 33 70%
Frequency metrology and clocks 2009 20 96 56%

Address terms


Rank Address term Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 LNE SYRTE 18 34% 2.8% 45
2 INNOVAT SPACE TIME PROJECT 18 83% 0.6% 10
3 HORLOGE ATOM 14 65% 0.8% 13
4 METROL TIME SPACE 13 69% 0.7% 11
5 METROL ESSAIS SYST REFERENCES TEMPS ES 11 78% 0.4% 7
6 TIME FREQUENCY 9 15% 3.7% 59
7 JOINT MEASUREMENT SCI 6 43% 0.6% 10
8 OBSERV PARISUMR 8630 6 100% 0.3% 4
9 ATOM FREQUENCY STAND 4 31% 0.7% 11
10 LPTF 4 36% 0.5% 8

Related classes at same level (level 1)


Rank Relatedness score Related classes
1 0.0000204616 FIBER OPTICAL FREQUENCY COMB//OPTICAL FREQUENCY METROLOGY//CARRIER ENVELOPE PHASE
2 0.0000178517 SIMPLE RESPONSE METHOD//SPACE NAVIGATION SYSTEMS//TIME FREQUENCY STANDARD
3 0.0000144412 MAGNETO OPTICAL TRAP//OPTICAL MOLASSES//ZEEMAN SLOWER
4 0.0000128262 FINE STRUCTURE CONSTANT//QUASAR SPECTRA//VARYING FINE STRUCTURE CONSTANT
5 0.0000125351 NONACCELERATOR PARTICLE PHYS GRP//NON ACCELERATOR PARTICLE PHYS GRP//FRANCIUM
6 0.0000119012 ATOM INTERFEROMETER//ATOM INTERFEROMETRY//VCQ
7 0.0000100164 TRAPPED ION//TRAPPED IONS//LAMB DICKE PARAMETER
8 0.0000091553 NONLINEAR OPTIC CRYSTAL//ENHANCEMENT CAVITY//EXTERNAL ENHANCEMENT CAVITY
9 0.0000089073 IODINE SPECTROSCOPY//MODULATION TRANSFER SPECTROSCOPY//OPTICAL FREQUENCY STANDARD
10 0.0000082431 COLD MOLECULES//PHOTOASSOCIATION//AIME COTTON