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

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
8839 1212 22.2 48%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
10 4 OPTICS//PHYSICS, PARTICLES & FIELDS//PHYSICS, MULTIDISCIPLINARY 1131262
251 3       JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS//PHYSICAL REVIEW A//PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 46185
1451 2             ANTIHYDROGEN//AVOGADRO CONSTANT//KILOGRAM 7819
8839 1                   AVOGADRO CONSTANT//KILOGRAM//WATT BALANCE 1212

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 AVOGADRO CONSTANT authKW 1691003 6% 96% 70
2 KILOGRAM authKW 1487958 5% 97% 61
3 WATT BALANCE authKW 1339150 5% 87% 61
4 METROLOGIA journal 1161858 29% 13% 357
5 PLANCK CONSTANT authKW 599918 3% 74% 32
6 MASS STANDARDS authKW 354269 1% 94% 15
7 INTERNATIONAL SYSTEM OF UNITS authKW 314892 2% 63% 20
8 FUNDAMENTAL PHYSICAL CONSTANTS authKW 291501 1% 64% 18
9 PLANCKS CONSTANT authKW 284188 2% 59% 19
10 SILICON SPHERE authKW 259120 1% 86% 12

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 Instruments & Instrumentation 53882 65% 0% 793
2 Physics, Applied 4479 40% 0% 483
3 Engineering, General 3016 12% 0% 150
4 Physics, Multidisciplinary 728 13% 0% 154
5 Engineering, Electrical & Electronic 712 16% 0% 198
6 Education, Scientific Disciplines 131 2% 0% 22
7 Spectroscopy 119 3% 0% 41
8 Physics, Atomic, Molecular & Chemical 49 4% 0% 47
9 Chemistry, Analytical 29 4% 0% 45
10 History & Philosophy of Science 5 0% 0% 4

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 IST METROL G COLONNETTI 103984 1% 24% 17
2 NMIJ METROL J AN 50385 0% 100% 2
3 VNIIM 49367 1% 28% 7
4 DIPARTIMENTO FIS GEN A AVOGADRO 48572 1% 21% 9
5 IST NAZL RIC METROL INRIM 37786 0% 50% 3
6 CENT OFF MEASU 33589 0% 67% 2
7 MAT P M FOURT 33589 0% 67% 2
8 IST METROL GUSTAVO COLONNETTI 32387 0% 43% 3
9 ABSOLUTE PHYS QUANTITIES 25193 0% 100% 1
10 ARBEITSGRP 1 22 25193 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 METROLOGIA 1161858 29% 13% 357
2 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 92098 15% 2% 180
3 PTB-MITTEILUNGEN 72034 2% 10% 28
4 MEASUREMENT TECHNIQUES 14157 3% 2% 33
5 MAPAN-JOURNAL OF METROLOGY SOCIETY OF INDIA 12443 1% 4% 12
6 JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS 9051 1% 3% 11
7 MEASUREMENT SCIENCE AND TECHNOLOGY 8949 5% 1% 57
8 JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY 7559 1% 2% 17
9 MEASUREMENT 6707 3% 1% 33
10 MEASUREMENT TECHNIQUES USSR 3499 1% 1% 10

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 AVOGADRO CONSTANT 1691003 6% 96% 70 Search AVOGADRO+CONSTANT Search AVOGADRO+CONSTANT
2 KILOGRAM 1487958 5% 97% 61 Search KILOGRAM Search KILOGRAM
3 WATT BALANCE 1339150 5% 87% 61 Search WATT+BALANCE Search WATT+BALANCE
4 PLANCK CONSTANT 599918 3% 74% 32 Search PLANCK+CONSTANT Search PLANCK+CONSTANT
5 MASS STANDARDS 354269 1% 94% 15 Search MASS+STANDARDS Search MASS+STANDARDS
6 INTERNATIONAL SYSTEM OF UNITS 314892 2% 63% 20 Search INTERNATIONAL+SYSTEM+OF+UNITS Search INTERNATIONAL+SYSTEM+OF+UNITS
7 FUNDAMENTAL PHYSICAL CONSTANTS 291501 1% 64% 18 Search FUNDAMENTAL+PHYSICAL+CONSTANTS Search FUNDAMENTAL+PHYSICAL+CONSTANTS
8 PLANCKS CONSTANT 284188 2% 59% 19 Search PLANCKS+CONSTANT Search PLANCKS+CONSTANT
9 SILICON SPHERE 259120 1% 86% 12 Search SILICON+SPHERE Search SILICON+SPHERE
10 FUNDAMENTAL CONSTANTS 217970 2% 29% 30 Search FUNDAMENTAL+CONSTANTS Search FUNDAMENTAL+CONSTANTS

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref.
in cl.		 Shr. of ref. in
cl.		 Citations
1 ROBINSON, IA , SCHLAMMINGER, S , (2016) THE WATT OR KIBBLE BALANCE: A TECHNIQUE FOR IMPLEMENTING THE NEW SI DEFINITION OF THE UNIT OF MASS.METROLOGIA. VOL. 53. ISSUE 5. P. A46 -A74 90 70% 1
2 LI, SS , ZHANG, ZH , ZHAO, W , LI, ZK , HUANG, SL , (2015) PROGRESS ON ACCURATE MEASUREMENT OF THE PLANCK CONSTANT: WATT BALANCE AND COUNTING ATOMS.CHINESE PHYSICS B. VOL. 24. ISSUE 1. P. - 68 87% 1
3 STEINER, R , (2013) HISTORY AND PROGRESS ON ACCURATE MEASUREMENTS OF THE PLANCK CONSTANT.REPORTS ON PROGRESS IN PHYSICS. VOL. 76. ISSUE 1. P. - 67 80% 30
4 FUJII, K , BETTIN, H , BECKER, P , MASSA, E , RIENITZ, O , PRAMANN, A , NICOLAUS, A , KURAMOTO, N , BUSCH, I , BORYS, M , (2016) REALIZATION OF THE KILOGRAM BY THE XRCD METHOD.METROLOGIA. VOL. 53. ISSUE 5. P. A19 -A45 63 90% 0
5 BECKER, P , FRIEDRICH, H , FUJII, K , GIARDINI, W , MANA, G , PICARD, A , POHL, HJ , RIEMANN, H , VALKIERS, S , (2009) THE AVOGADRO CONSTANT DETERMINATION VIA ENRICHED SILICON-28.MEASUREMENT SCIENCE AND TECHNOLOGY. VOL. 20. ISSUE 9. P. - 68 88% 21
6 GLASER, M , BORYS, M , (2009) PRECISION MASS MEASUREMENTS.REPORTS ON PROGRESS IN PHYSICS. VOL. 72. ISSUE 12. P. - 72 85% 4
7 MANA, G , MASSA, E , (2012) THE AVOGADRO AND THE PLANCK CONSTANTS FOR REDEFINITION OF THE KILOGRAM.RIVISTA DEL NUOVO CIMENTO. VOL. 35. ISSUE 7. P. 353 -388 58 91% 5
8 EICHENBERGER, A , GENEVES, G , GOURNAY, P , (2009) DETERMINATION OF THE PLANCK CONSTANT BY MEANS OF A WATT BALANCE.EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS. VOL. 172. ISSUE . P. 363 -383 47 96% 41
9 AZUMA, Y , BARAT, P , BARTL, G , BETTIN, H , BORYS, M , BUSCH, I , CIBIK, L , D'AGOSTINO, G , FUJII, K , FUJIMOTO, H , ET AL (2015) IMPROVED MEASUREMENT RESULTS FOR THE AVOGADRO CONSTANT USING A SI-28-ENRICHED CRYSTAL.METROLOGIA. VOL. 52. ISSUE 2. P. 360 -375 37 79% 28
10 LI, SS , HAN, B , LI, ZK , LAN, J , (2012) PRECISELY MEASURING THE PLANCK CONSTANT BY ELECTROMECHANICAL BALANCES.MEASUREMENT. VOL. 45. ISSUE 1. P. 1 -13 45 94% 14

Classes with closest relation at Level 1


Rank Class id link
1 9450 PROTON RADIUS//RYDBERG CONSTANT//MUONIC HYDROGEN
2 21640 BOLTZMANN CONSTANT//PRIMARY THERMOMETRY//ACOUSTIC THERMOMETRY
3 13607 JOSEPHSON ARRAYS//VOLTAGE STANDARD//JOSEPHSON VOLTAGE STANDARD
4 37693 GERMAN STAND//HERLEV HOSP GYNECOL OBSTET//ENZYME AMPLIFICATION ASSAY
5 11542 TORSION BALANCE//GRAVITATIONAL CONSTANT//NEWTONIAN GRAVITATIONAL CONSTANT
6 13325 METROLOGIA//MEASUREMENT UNCERTAINTY//COVERAGE INTERVAL
7 27313 PISTON GAUGE//PRIMARY PRESSURE STANDARD//METROLOGIA
8 13090 HETERODYNE INTERFEROMETER//HETERODYNE INTERFEROMETRY//FRINGE INTERPOLATION
9 21900 PULSE HEIGHT WEIGHTING TECHNIQUE//GOLD 197//ANTI COMPTON NAITL SPECTROMETER
10 27697 SONIC NOZZLE//CRITICAL NOZZLE//CRITICAL FLOW VENTURI NOZZLE

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