Class information for:
Level 1: BOLTZMANN CONSTANT//PRIMARY THERMOMETRY//ACOUSTIC THERMOMETRY

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
21640 411 20.4 44%


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
18 4 THERMODYNAMICS//ENERGY & FUELS//ENGINEERING, CHEMICAL 531182
661 3       METROLOGIA//JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER//RADIATIVE HEAT TRANSFER 10556
2696 2             METROLOGIA//ITS 90//INTERNATIONAL JOURNAL OF THERMOPHYSICS 3346
21640 1                   BOLTZMANN CONSTANT//PRIMARY THERMOMETRY//ACOUSTIC THERMOMETRY 411

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 BOLTZMANN CONSTANT authKW 1654714 9% 64% 35
2 PRIMARY THERMOMETRY authKW 808977 3% 78% 14
3 ACOUSTIC THERMOMETRY authKW 571491 2% 77% 10
4 PLTS 2000 authKW 530669 2% 71% 10
5 NOISE THERMOMETRY authKW 495289 2% 67% 10
6 QUASI SPHERICAL RESONATORS authKW 445766 1% 100% 6
7 MICROWAVE RESONANCE authKW 391014 2% 53% 10
8 ACOUSTIC GAS THERMOMETRY authKW 371472 1% 100% 5
9 ACOUSTIC GAS THERMOMETER authKW 297178 1% 100% 4
10 DIELECTRIC CONSTANT GAS THERMOMETRY authKW 297178 1% 100% 4

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 6923 41% 0% 167
2 Physics, Applied 2993 55% 0% 224
3 Thermodynamics 1835 18% 0% 72
4 Mechanics 521 13% 0% 54
5 Engineering, General 382 8% 0% 32
6 Chemistry, Physical 214 18% 0% 73
7 Physics, Condensed Matter 88 10% 0% 40
8 Physics, Multidisciplinary 85 8% 0% 34
9 Engineering, Electrical & Electronic 71 10% 0% 42
10 Audiology & Speech-Language Pathology 41 1% 0% 6

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 PROC MEASUREMENT 191593 2% 37% 7
2 INTERDISCIPLINARY COMPUTAT SCI LISC 140006 2% 27% 7
3 CBTLM 99058 0% 67% 2
4 GRP TERMOCAL 91434 1% 31% 4
5 DOVE FIELDS 74294 0% 100% 1
6 INNOVAT METROL SERV 74294 0% 100% 1
7 LNE CNAM 74294 0% 100% 1
8 METROL DESSAI 74294 0% 100% 1
9 POSMQI PUC RIO 74294 0% 100% 1
10 QUANTUM ELECT METROL 817 74294 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 131668 17% 3% 70
2 INTERNATIONAL JOURNAL OF THERMOPHYSICS 49396 13% 1% 53
3 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 4799 6% 0% 24
4 JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY 3782 2% 1% 7
5 MEASUREMENT TECHNIQUES 2449 2% 0% 8
6 JOURNAL OF LOW TEMPERATURE PHYSICS 2294 4% 0% 15
7 JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS 2063 2% 0% 8
8 CRYOGENICS 1827 3% 0% 11
9 MEASUREMENT TECHNIQUES USSR 1652 1% 1% 4
10 COMPTES RENDUS PHYSIQUE 1408 1% 0% 5

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 BOLTZMANN CONSTANT 1654714 9% 64% 35 Search BOLTZMANN+CONSTANT Search BOLTZMANN+CONSTANT
2 PRIMARY THERMOMETRY 808977 3% 78% 14 Search PRIMARY+THERMOMETRY Search PRIMARY+THERMOMETRY
3 ACOUSTIC THERMOMETRY 571491 2% 77% 10 Search ACOUSTIC+THERMOMETRY Search ACOUSTIC+THERMOMETRY
4 PLTS 2000 530669 2% 71% 10 Search PLTS+2000 Search PLTS+2000
5 NOISE THERMOMETRY 495289 2% 67% 10 Search NOISE+THERMOMETRY Search NOISE+THERMOMETRY
6 QUASI SPHERICAL RESONATORS 445766 1% 100% 6 Search QUASI+SPHERICAL+RESONATORS Search QUASI+SPHERICAL+RESONATORS
7 MICROWAVE RESONANCE 391014 2% 53% 10 Search MICROWAVE+RESONANCE Search MICROWAVE+RESONANCE
8 ACOUSTIC GAS THERMOMETRY 371472 1% 100% 5 Search ACOUSTIC+GAS+THERMOMETRY Search ACOUSTIC+GAS+THERMOMETRY
9 ACOUSTIC GAS THERMOMETER 297178 1% 100% 4 Search ACOUSTIC+GAS+THERMOMETER Search ACOUSTIC+GAS+THERMOMETER
10 DIELECTRIC CONSTANT GAS THERMOMETRY 297178 1% 100% 4 Search DIELECTRIC+CONSTANT+GAS+THERMOMETRY Search DIELECTRIC+CONSTANT+GAS+THERMOMETRY

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 GAVIOSO, RM , RIPA, DM , STEUR, PPM , GAISER, C , ZANDT, T , FELLMUTH, B , DE PODESTA, M , UNDERWOOD, R , SUTTON, G , PITRE, L , ET AL (2016) PROGRESS TOWARDS THE DETERMINATION OF THERMODYNAMIC TEMPERATURE WITH ULTRA-LOW UNCERTAINTY.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES. VOL. 374. ISSUE 2064. P. - 35 78% 2
2 MOLDOVER, MR , GAVIOSO, RM , MEHL, JB , PITRE, L , DE PODESTA, M , ZHANG, JT , (2014) ACOUSTIC GAS THERMOMETRY.METROLOGIA. VOL. 51. ISSUE 1. P. R1-R19 38 67% 28
3 GAVIOSO, RM , RIPA, DM , STEUR, PPM , GAISER, C , TRUONG, D , GUIANVARC'H, C , TARIZZO, P , STUART, FM , DEMATTEIS, R , (2015) A DETERMINATION OF THE MOLAR GAS CONSTANT R BY ACOUSTIC THERMOMETRY IN HELIUM.METROLOGIA. VOL. 52. ISSUE 5. P. S274 -S304 36 72% 10
4 PITRE, L , SPARASCI, F , TRUONG, D , GUILLOU, A , RISEGARI, L , HIMBERT, ME , (2011) MEASUREMENT OF THE BOLTZMANN CONSTANT K(B) USING A QUASI-SPHERICAL ACOUSTIC RESONATOR.INTERNATIONAL JOURNAL OF THERMOPHYSICS. VOL. 32. ISSUE 9. P. 1825-1886 32 80% 59
5 ZHANG, K , FENG, XJ , ZHANG, JT , LIN, H , DUAN, YN , DUAN, YY , (2017) MICROWAVE MEASUREMENTS OF THE LENGTH AND THERMAL EXPANSION OF A CYLINDRICAL RESONATOR FOR PRIMARY ACOUSTIC GAS THERMOMETRY.MEASUREMENT SCIENCE AND TECHNOLOGY. VOL. 28. ISSUE 1. P. - 25 100% 0
6 FISCHER, J , (2016) LOW UNCERTAINTY BOLTZMANN CONSTANT DETERMINATIONS AND THE KELVIN REDEFINITION.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES. VOL. 374. ISSUE 2064. P. - 28 64% 5
7 QU, JF , BENZ, SP , POLLAROLO, A , ROGALLA, H , TEW, WL , WHITE, R , ZHOU, KL , (2015) IMPROVED ELECTRONIC MEASUREMENT OF THE BOLTZMANN CONSTANT BY JOHNSON NOISE THERMOMETRY.METROLOGIA. VOL. 52. ISSUE 5. P. S242 -S256 24 75% 14
8 YAMAZAWA, K , URANO, C , YAMADA, T , HORIE, T , YOSHIDA, S , YAMAMORI, H , KANEKO, N , FUKUYAMA, Y , MARUYAMA, M , DOMAE, A , ET AL (2014) BOLTZMANN CONSTANT MEASUREMENTS USING QVNS-BASED JOHNSON NOISE THERMOMETRY AT NMIJ, AIST.INTERNATIONAL JOURNAL OF THERMOPHYSICS. VOL. 35. ISSUE 6-7. P. 985 -998 22 88% 7
9 PITRE, L , SPARASCI, F , TRUONG, D , GUILLOU, A , RISEGARI, L , HIMBERT, ME , (2011) DETERMINATION OF THE BOLTZMANN CONSTANT USING A QUASI-SPHERICAL ACOUSTIC RESONATOR.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES. VOL. 369. ISSUE 1953. P. 4014 -4027 23 92% 6
10 UNDERWOOD, R , DE PODESTA, M , SUTTON, G , STANGER, L , RUSBY, R , HARRIS, P , MORANTZ, P , MACHIN, G , (2016) ESTIMATES OF THE DIFFERENCE BETWEEN THERMODYNAMIC TEMPERATURE AND THE INTERNATIONAL TEMPERATURE SCALE OF 1990 IN THE RANGE 118 K TO 303 K.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES. VOL. 374. ISSUE 2064. P. - 22 71% 3

Classes with closest relation at Level 1


Rank Class id link
1 11064 ITS 90//INTERNATIONAL JOURNAL OF THERMOPHYSICS//METROLOGIA
2 36642 ACCELERATED SEGMENT TEST ALGORITHM//ADAPTIVE HISTOGRAM EQUALISATION//BELT LONGITUDINAL TEAR
3 2444 INTERNATIONAL JOURNAL OF THERMOPHYSICS//REFRIGERANT//SATURATED LIQUID DENSITY
4 27313 PISTON GAUGE//PRIMARY PRESSURE STANDARD//METROLOGIA
5 22831 CRYOGENICS//CRYOGENIC THERMOMETERS//DIODE THERMOMETERS
6 8839 AVOGADRO CONSTANT//KILOGRAM//WATT BALANCE
7 32272 PHYS DOCTORAL//ROMANIAN REPORTS IN PHYSICS//ACOUSTIC RESONANT FREQUENCIES
8 13607 JOSEPHSON ARRAYS//VOLTAGE STANDARD//JOSEPHSON VOLTAGE STANDARD
9 28355 PL ASTRON//METHODS OF ASTRONOMICAL OBSERVATIONS//90 DEGREE
10 35024 ACOUSTIC GAS SENSOR//EFFECTIVE RELAXATION AREA//EFFECTIVE SPECIFIC HEAT CAPACITY

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