Class information for:
Level 1: AVOGADRO CONSTANT//KILOGRAM//WATT BALANCE

Basic class information
ID Publications Average number
of references		 Avg. shr. active
ref. in WoS
9424 1088 20.6 47%


Bar chart of Publication_year

Last years might be incomplete

Classes in level above (level 2)


ID, lev.
above		 Publications Label for level above
1991 5062 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT//METROLOGIA//AVOGADRO CONSTANT

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 AVOGADRO CONSTANT Author keyword 134 87% 6% 66
2 KILOGRAM Author keyword 120 91% 5% 50
3 WATT BALANCE Author keyword 102 86% 5% 51
4 METROLOGIA Journal 42 12% 29% 319
5 PLANCK CONSTANT Author keyword 24 60% 2% 26
6 AVOGADROS CONSTANT Author keyword 18 89% 1% 8
7 ELECTRONIC KILOGRAM Author keyword 17 100% 1% 8
8 SILICON SPHERE Author keyword 17 75% 1% 12
9 INTERNATIONAL SYSTEM OF UNITS Author keyword 15 56% 2% 18
10 JOULE BALANCE Author keyword 15 88% 1% 7

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 AVOGADRO CONSTANT 134 87% 6% 66 Search AVOGADRO+CONSTANT Search AVOGADRO+CONSTANT
2 KILOGRAM 120 91% 5% 50 Search KILOGRAM Search KILOGRAM
3 WATT BALANCE 102 86% 5% 51 Search WATT+BALANCE Search WATT+BALANCE
4 PLANCK CONSTANT 24 60% 2% 26 Search PLANCK+CONSTANT Search PLANCK+CONSTANT
5 AVOGADROS CONSTANT 18 89% 1% 8 Search AVOGADROS+CONSTANT Search AVOGADROS+CONSTANT
6 ELECTRONIC KILOGRAM 17 100% 1% 8 Search ELECTRONIC+KILOGRAM Search ELECTRONIC+KILOGRAM
7 SILICON SPHERE 17 75% 1% 12 Search SILICON+SPHERE Search SILICON+SPHERE
8 INTERNATIONAL SYSTEM OF UNITS 15 56% 2% 18 Search INTERNATIONAL+SYSTEM+OF+UNITS Search INTERNATIONAL+SYSTEM+OF+UNITS
9 JOULE BALANCE 15 88% 1% 7 Search JOULE+BALANCE Search JOULE+BALANCE
10 KILOGRAM REDEFINITION 14 100% 1% 7 Search KILOGRAM+REDEFINITION Search KILOGRAM+REDEFINITION

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 AVOGADRO CONSTANT 191 80% 11% 119
2 KILOGRAM 173 68% 14% 150
3 PLANCK CONSTANT 59 77% 4% 40
4 WATT BALANCE 39 74% 3% 29
5 ELECTRONIC KILOGRAM 23 86% 1% 12
6 MARK II 20 100% 1% 9
7 IMGC 15 77% 1% 10
8 MASS STANDARDS 15 77% 1% 10
9 SILICON SPHERE 15 77% 1% 10
10 REDEFINITION 14 20% 6% 64

Journals


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 METROLOGIA 42 12% 29% 319
2 PTB-MITTEILUNGEN 3 10% 3% 31

Reviews


Title Publ. year Cit. Active references % act. ref.
to same field
Watt balance experiments for the determination of the Planck constant and the redefinition of the kilogram 2013 24 35 77%
History and progress on accurate measurements of the Planck constant 2013 19 84 79%
Determination of the Planck constant by means of a watt balance 2009 35 49 94%
CODATA recommended values of the fundamental physical constants: 1998 2000 588 371 26%
History and progress in the accurate determination of the Avogadro constant 2001 60 74 74%
The Avogadro constant determination via enriched silicon-28 2009 20 77 90%
Towards a new SI: a review of progress made since 2011 2014 5 44 68%
Precisely measuring the Planck constant by electromechanical balances 2012 11 44 89%
CODATA recommended values of the fundamental physical constants: 1998 1999 202 367 26%
Simple principles for metrology in chemistry: identifying and counting 2009 8 3 100%

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 IST NAZL RIC METROL INRIM 4 75% 0.3% 3
2 IST METROL G COLONNETTI 4 22% 1.4% 15
3 VNIIM 2 28% 0.6% 7
4 MAT P M FOURT 2 67% 0.2% 2
5 DIPARTIMENTO FIS GEN A AVOGADRO 2 21% 0.8% 9
6 IST METROL GUSTAVO COLONNETTI 1 33% 0.2% 2
7 TECHNOL ADMUS COMMERCE 1 33% 0.2% 2
8 AIST CENT 1 50% 0.1% 1
9 BASIC STAND LENGTH MASS 1 50% 0.1% 1
10 BIPM 1 50% 0.1% 1

Related classes at same level (level 1)


Rank Relatedness score Related classes
1 0.0000175375 CRYOGENIC CURRENT COMPARATOR//AC QUANTUM HALL EFFECT//CURRENT COMPARATORS
2 0.0000095245 JOSEPHSON ARRAYS//VOLTAGE STANDARD//JOSEPHSON VOLTAGE STANDARD
3 0.0000086692 BUILD UP SYSTEM//TORQUE STANDARD//DEADWEIGHT FORCE MACHINE
4 0.0000081450 CONSENSUS RELATION//STAT ENGN//DEGREE OF EQUIVALENCE
5 0.0000076997 LAMB SHIFT//BOUND STATE QED//RADIATIVE ELECTRON CAPTURE
6 0.0000065361 TORSION BALANCE//GRAVITATIONAL CONSTANT//NEWTONIAN GRAVITATIONAL CONSTANT
7 0.0000063148 GAMMA GAMMA COINCIDENCE SPECTRA//CAPTURE KERNEL//CRYSTAL GRID
8 0.0000056954 PROC MEASUREMENT SENSOR TECHNOL//NANOMETROLOGY//MICRO CMM
9 0.0000055519 APPLICATIONS OF LINEAR ALGEBRA//PRIORITY CONTROVERSIES//COMPONENTS SIZING
10 0.0000047362 GASEOUS STANDARD MIXTURES//CRITICAL FLOW VENTURI NOZZLE//CRITICAL NOZZLE