| Discipline name | D-Index | World Ranking | National Ranking | Publications | Citations |
|---|---|---|---|---|---|
| Mechanical and Aerospace Engineering | 38 | 2250 | 819 | 178 | 6313 |
The chart shows the history of publications by Robert E. Apfel between 1969 and 2014, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Robert E. Apfel published across 46 years, from 1969 to 2014, averaging 4.4 papers a year. Output peaked at 14 publications in 1991. 1 of the 203 publications appeared in the last two years.
203 publications in total across all disciplines
| Year | Publications |
|---|---|
| 1969 | 1 |
| 1970 | 2 |
| 1971 | 4 |
| 1972 | 1 |
| 1973 | 0 |
| 1974 | 1 |
| 1975 | 2 |
| 1976 | 3 |
| 1977 | 5 |
| 1978 | 6 |
| 1979 | 3 |
| 1980 | 2 |
| 1981 | 5 |
| 1982 | 4 |
| 1983 | 3 |
| 1984 | 4 |
| 1985 | 6 |
| 1986 | 5 |
| 1987 | 4 |
| 1988 | 8 |
| 1989 | 9 |
| 1990 | 9 |
| 1991 | 14 |
| 1992 | 8 |
| 1993 | 10 |
| 1994 | 10 |
| 1995 | 12 |
| 1996 | 14 |
| 1997 | 9 |
| 1998 | 7 |
| 1999 | 8 |
| 2000 | 7 |
| 2001 | 10 |
| 2002 | 4 |
| 2003 | 1 |
| 2004 | 0 |
| 2005 | 0 |
| 2006 | 0 |
| 2007 | 1 |
| 2008 | 0 |
| 2009 | 0 |
| 2010 | 0 |
| 2011 | 0 |
| 2012 | 0 |
| 2013 | 0 |
| 2014 | 1 |
| Total | 203 |
The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Robert E. Apfel sits on this spectrum.
This scientist: 178 publications — 36th percentile
36% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 659 publications or more.
| Publications | Scientists | This scientist |
|---|---|---|
| 47–56 | 10 | |
| 57–66 | 23 | |
| 67–76 | 32 | |
| 77–86 | 62 | |
| 87–96 | 67 | |
| 97–106 | 91 | |
| 107–116 | 113 | |
| 117–126 | 115 | |
| 127–136 | 130 | |
| 137–146 | 140 | |
| 147–156 | 155 | |
| 157–166 | 132 | |
| 167–176 | 133 | |
| 177–186 | 130 | 178 |
| 187–196 | 140 | |
| 197–206 | 115 | |
| 207–216 | 125 | |
| 217–226 | 117 | |
| 227–236 | 99 | |
| 237–246 | 92 | |
| 247–256 | 100 | |
| 257–266 | 95 | |
| 267–276 | 88 | |
| 277–286 | 77 | |
| 287–296 | 74 | |
| 297–306 | 74 | |
| 307–316 | 62 | |
| 317–326 | 70 | |
| 327–336 | 59 | |
| 337–346 | 58 | |
| 347–356 | 45 | |
| 357–366 | 44 | |
| 367–376 | 36 | |
| 377–386 | 41 | |
| 387–396 | 32 | |
| 397–406 | 23 | |
| 407–416 | 28 | |
| 417–426 | 27 | |
| 427–436 | 25 | |
| 437–446 | 23 | |
| 447–456 | 23 | |
| 457–466 | 20 | |
| 467–476 | 12 | |
| 477–486 | 24 | |
| 487–496 | 18 | |
| 497–506 | 12 | |
| 507–516 | 13 | |
| 517–526 | 21 | |
| 527–536 | 12 | |
| 537–546 | 8 | |
| 547–556 | 16 | |
| 557–566 | 3 | |
| 567–576 | 11 | |
| 577–586 | 6 | |
| 587–596 | 5 | |
| 597–606 | 6 | |
| 607–616 | 7 | |
| 617–626 | 7 | |
| 627–636 | 10 | |
| 637–646 | 4 | |
| 647–656 | 3 | |
| 657–658 | 2 | |
| 659+ | 100 |
The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Robert E. Apfel sits on this spectrum.
This scientist: 38 D-Index — 36th percentile
36% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 93 D-Index or more.
| D-Index | Scientists | This scientist |
|---|---|---|
| 30 | 83 | |
| 31 | 113 | |
| 32 | 144 | |
| 33 | 153 | |
| 34 | 189 | |
| 35 | 158 | |
| 36 | 139 | |
| 37 | 127 | |
| 38 | 130 | 38 |
| 39 | 126 | |
| 40 | 104 | |
| 41 | 100 | |
| 42 | 107 | |
| 43 | 101 | |
| 44 | 103 | |
| 45 | 79 | |
| 46 | 88 | |
| 47 | 70 | |
| 48 | 83 | |
| 49 | 44 | |
| 50 | 64 | |
| 51 | 56 | |
| 52 | 50 | |
| 53 | 48 | |
| 54 | 58 | |
| 55 | 52 | |
| 56 | 48 | |
| 57 | 42 | |
| 58 | 34 | |
| 59 | 42 | |
| 60 | 37 | |
| 61 | 42 | |
| 62 | 44 | |
| 63 | 22 | |
| 64 | 33 | |
| 65 | 29 | |
| 66 | 23 | |
| 67 | 29 | |
| 68 | 24 | |
| 69 | 19 | |
| 70 | 34 | |
| 71 | 26 | |
| 72 | 19 | |
| 73 | 18 | |
| 74 | 19 | |
| 75 | 14 | |
| 76 | 19 | |
| 77 | 8 | |
| 78 | 18 | |
| 79 | 16 | |
| 80 | 12 | |
| 81 | 17 | |
| 82 | 11 | |
| 83 | 16 | |
| 84 | 7 | |
| 85 | 9 | |
| 86 | 8 | |
| 87 | 6 | |
| 88 | 6 | |
| 89 | 7 | |
| 90 | 10 | |
| 91 | 4 | |
| 92 | 4 | |
| 93+ | 100 |
Robert E. Apfel was affiliated with Yale University in the United States during their academic career. Their professional work was connected to this institution, but specific details about their research papers, co-authors, or publication venues are not available.
There is no recorded information regarding the scientist's main fields or subfields of study, which limits insights into the precise areas of expertise or research focus they pursued.
No data on published books or known awards is available for this researcher, and there are no documented recent papers or frequent publication outlets.
The absence of detailed information on main topics of work or frequent collaborators indicates that either this data has not been publicly recorded or the contributions are not extensively documented in accessible academic sources.
Robert E. Apfel is noted as deceased, and all references to their career are thus presented in past tense.
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