Class information for:
Level 2: SETI//EXTRATERRESTRIAL INTELLIGENCE//FERMI PARADOX

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
3915 808 30.6 37%


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
1 4 ECONOMICS//EDUCATION & EDUCATIONAL RESEARCH//PSYCHOL 3876184
594 3       ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES//UV B RADIATION//ORIGIN OF LIFE 14910
3915 2             SETI//EXTRATERRESTRIAL INTELLIGENCE//FERMI PARADOX 808
14977 1                   SETI//EXTRATERRESTRIAL INTELLIGENCE//FERMI PARADOX 738
36940 1                   NAVAIDS//LORAN C//BUOYAGE 70

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 SETI authKW 3204816 13% 79% 107
2 EXTRATERRESTRIAL INTELLIGENCE authKW 1597873 8% 69% 61
3 FERMI PARADOX authKW 777385 3% 86% 24
4 INTERSTELLAR COMMUNICATION authKW 644415 2% 95% 18
5 SEARCH FOR EXTRATERRESTRIAL INTELLIGENCE authKW 620092 2% 86% 19
6 DRAKE EQUATION authKW 472368 2% 83% 15
7 INTERSTELLAR MESSAGES authKW 343542 1% 91% 10
8 ACTIVE SETI authKW 340109 1% 100% 9
9 METI authKW 336123 2% 68% 13
10 LOGNORMAL PROBABILITY DENSITIES authKW 302319 1% 100% 8

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 Engineering, Aerospace 34867 32% 0% 255
2 Astronomy & Astrophysics 9137 44% 0% 357
3 Engineering, Marine 3023 3% 0% 28
4 Biology 1808 14% 0% 112
5 Geosciences, Multidisciplinary 1688 18% 0% 142
6 Social Sciences, Interdisciplinary 201 3% 0% 23
7 Oceanography 146 3% 0% 28
8 History & Philosophy of Science 127 1% 0% 12
9 Remote Sensing 90 2% 0% 13
10 Religion 80 1% 0% 11

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 CREAT TECHNOL GRP 157456 1% 83% 5
2 SETI PERMANENT COMM 151159 0% 100% 4
3 SETI PERMANENT STUDY GRP 113370 0% 100% 3
4 PROJECT PHOENIX 75580 0% 100% 2
5 TASK FORCE SCI TECHNOL 75580 0% 100% 2
6 FUTURE HUMANITY 66122 1% 25% 7
7 ALBERTS SETI CHAIR 37790 0% 100% 1
8 ATTORNEYS COUNSELORS LAW 37790 0% 100% 1
9 CNRS EHESS MBHN UMR 8560 37790 0% 100% 1
10 COHN PHILOSOPHY HIST SCI IDEAS 37790 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 ACTA ASTRONAUTICA 243602 24% 3% 192
2 INTERNATIONAL JOURNAL OF ASTROBIOLOGY 242262 7% 12% 53
3 JBIS-JOURNAL OF THE BRITISH INTERPLANETARY SOCIETY 140859 4% 11% 34
4 QUARTERLY JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY 52703 3% 6% 23
5 ASTROBIOLOGY 51538 4% 4% 36
6 JOURNAL OF NAVIGATION 28599 3% 3% 28
7 BOLETIM DE CIENCIAS GEODESICAS 13833 1% 4% 9
8 SPACE POLICY 10342 1% 2% 12
9 ASTRONOMY & GEOPHYSICS 4074 1% 2% 7
10 ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES 3718 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 SETI 3204816 13% 79% 107 Search SETI Search SETI
2 EXTRATERRESTRIAL INTELLIGENCE 1597873 8% 69% 61 Search EXTRATERRESTRIAL+INTELLIGENCE Search EXTRATERRESTRIAL+INTELLIGENCE
3 FERMI PARADOX 777385 3% 86% 24 Search FERMI+PARADOX Search FERMI+PARADOX
4 INTERSTELLAR COMMUNICATION 644415 2% 95% 18 Search INTERSTELLAR+COMMUNICATION Search INTERSTELLAR+COMMUNICATION
5 SEARCH FOR EXTRATERRESTRIAL INTELLIGENCE 620092 2% 86% 19 Search SEARCH+FOR+EXTRATERRESTRIAL+INTELLIGENCE Search SEARCH+FOR+EXTRATERRESTRIAL+INTELLIGENCE
6 DRAKE EQUATION 472368 2% 83% 15 Search DRAKE+EQUATION Search DRAKE+EQUATION
7 INTERSTELLAR MESSAGES 343542 1% 91% 10 Search INTERSTELLAR+MESSAGES Search INTERSTELLAR+MESSAGES
8 ACTIVE SETI 340109 1% 100% 9 Search ACTIVE+SETI Search ACTIVE+SETI
9 METI 336123 2% 68% 13 Search METI Search METI
10 LOGNORMAL PROBABILITY DENSITIES 302319 1% 100% 8 Search LOGNORMAL+PROBABILITY+DENSITIES Search LOGNORMAL+PROBABILITY+DENSITIES

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 CIRKOVIC, MM , (2013) WHO ARE THE SETI SCEPTICS?.ACTA ASTRONAUTICA. VOL. 89. ISSUE . P. 38-45 24 89% 0
2 WRIGHT, JT , MULLAN, B , SIGURDSSON, S , POVICH, MS , (2014) THE (G) INFRARED SEARCH FOR EXTRATERRESTRIAL CIVILIZATIONS WITH LARGE ENERGY SUPPLIES. I. BACKGROUND AND JUSTIFICATION.ASTROPHYSICAL JOURNAL. VOL. 792. ISSUE 1. P. - 27 66% 18
3 CIRKOVIC, MM , (2015) KARDASHEV'S CLASSIFICATION AT 50+: A FINE VEHICLE WITH ROOM FOR IMPROVEMENT.SERBIAN ASTRONOMICAL JOURNAL. VOL. 191. ISSUE . P. 1 -15 32 60% 2
4 CIRKOVIC, MM , VUKOTIC, B , (2016) LONG-TERM PROSPECTS: MITIGATION OF SUPERNOVA AND GAMMA-RAY BURST THREAT TO INTELLIGENT BEINGS.ACTA ASTRONAUTICA. VOL. 129. ISSUE . P. 438 -446 35 54% 0
5 HAQQ-MISRA, J , BUSCH, MW , SOM, SM , BAUM, SD , (2013) THE BENEFITS AND HARM OF TRANSMITTING INTO SPACE.SPACE POLICY. VOL. 29. ISSUE 1. P. 40-48 25 69% 3
6 MUSSO, P , (2012) THE PROBLEM OF ACTIVE SETI: AN OVERVIEW.ACTA ASTRONAUTICA. VOL. 78. ISSUE . P. 43 -54 17 94% 6
7 NEAL, M , (2014) PREPARING FOR EXTRATERRESTRIAL CONTACT.RISK MANAGEMENT-JOURNAL OF RISK CRISIS AND DISASTER. VOL. 16. ISSUE 2. P. 63 -87 27 55% 4
8 MORRISON, IS , GOWANLOCK, MG , (2015) EXTENDING GALACTIC HABITABLE ZONE MODELING TO INCLUDE THE EMERGENCE OF INTELLIGENT LIFE.ASTROBIOLOGY. VOL. 15. ISSUE 8. P. 683 -696 22 65% 1
9 BAUM, SD , HAQQ-MISRA, JD , DOMAGAL-GOLDMAN, SD , (2011) WOULD CONTACT WITH EXTRATERRESTRIALS BENEFIT OR HARM HUMANITY? A SCENARIO ANALYSIS.ACTA ASTRONAUTICA. VOL. 68. ISSUE 11-12. P. 2114 -2129 21 70% 8
10 MACCONE, C , (2014) EVOLUTION AND HISTORY IN A NEW "MATHEMATICAL SETI" MODEL.ACTA ASTRONAUTICA. VOL. 93. ISSUE . P. 317-344 14 100% 0

Classes with closest relation at Level 2


Rank Class id link
1 2882 DEINOCOCCUS RADIODURANS//ASTROBIOL EXTREMOPHILES//PLANETARY PROTECTION
2 3641 RADIO ASTRONOMY//INSTRUMENTATION INTERFEROMETERS//TECHNIQUES INTERFEROMETRIC
3 3488 DAISYWORLD//MAXIMUM ENTROPY PRODUCTION//NATURAL PROCESS
4 1989 ORIGINS OF LIFE AND EVOLUTION OF BIOSPHERES//ORIGIN OF LIFE//GENETIC CODE
5 239 PLANETARY SYSTEMS//STARS PRE MAIN SEQUENCE//PLANETS AND SATELLITES FORMATION
6 3211 SINGULAR SPECTRUM ANALYSIS//ATMOSPHERIC ELECTRICITY//GLOBAL ELECTRIC CIRCUIT
7 4134 CONSPIRACY THEORIES//CONSPIRACY BELIEFS//SEX DISCRIMINATION OF CANCER RISK
8 2416 UV B RADIATION//UV B//ULTRAVIOLET B RADIATION
9 4183 STRAY VOLTAGE//MILKLINES//MILKING MACHINES
10 4185 MOLECULAR COMMUNICATION//NANONETWORKS//NANO COMMUNICATION NETWORKS

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