Document (#34333)

Author

Järvelin, K.
Persson, O.

Title

¬The DCI-index : discounted cumulated impact-based research evaluation

Issue

Erratum re.

Source

Journal of the American Society for Information Science and Technology. 59(2008) no.14, S.2350-2352

Year

2008

Abstract

The article by K. Järvelin & O. Persson published in JASIST 59(9), The DCI-Index: Discounted Cumulated Impact-Based Research Evaluation, (pp. 1433-1440) contains an unfortunate error in one of its formulas, Equation 3. The present paper gives the correction and an example of impact analysis based on the corrected formula.

Theme

Informetrie

Object

h-index

Similar documents (author)

1. Järvelin, K.; Persson, O.: ¬The DCI index : discounted cumulated impact-based research evaluation (2008) 6.28

   6.2755895 = sum of:
     6.2755895 = sum of:
       2.2241044 = weight(author_txt:järvelin in 3694) [ClassicSimilarity], result of:
         2.2241044 = score(doc=3694,freq=1.0), product of:
           0.5568687 = queryWeight, product of:
             7.9878955 = idf(docFreq=40, maxDocs=44421)
             0.06971407 = queryNorm
           3.9939477 = fieldWeight in 3694, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.9878955 = idf(docFreq=40, maxDocs=44421)
             0.5 = fieldNorm(doc=3694)
       4.051485 = weight(author_txt:persson in 3694) [ClassicSimilarity], result of:
         4.051485 = score(doc=3694,freq=1.0), product of:
           0.8306005 = queryWeight, product of:
             1.2212925 = boost
             9.755557 = idf(docFreq=6, maxDocs=44421)
             0.06971407 = queryNorm
           4.8777785 = fieldWeight in 3694, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.755557 = idf(docFreq=6, maxDocs=44421)
             0.5 = fieldNorm(doc=3694)
   

2. Persson, O.; Beckmann, M.: Locating the network of interacting authors in scientific specialities (1995) 2.03

   2.0257425 = sum of:
     2.0257425 = product of:
       4.051485 = sum of:
         4.051485 = weight(author_txt:persson in 3368) [ClassicSimilarity], result of:
           4.051485 = score(doc=3368,freq=1.0), product of:
             0.8306005 = queryWeight, product of:
               1.2212925 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.06971407 = queryNorm
             4.8777785 = fieldWeight in 3368, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.5 = fieldNorm(doc=3368)
       0.5 = coord(1/2)
   

3. Persson, O.; Melin, G.: Equalization, growth and integration of science (1996) 2.03

   2.0257425 = sum of:
     2.0257425 = product of:
       4.051485 = sum of:
         4.051485 = weight(author_txt:persson in 6766) [ClassicSimilarity], result of:
           4.051485 = score(doc=6766,freq=1.0), product of:
             0.8306005 = queryWeight, product of:
               1.2212925 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.06971407 = queryNorm
             4.8777785 = fieldWeight in 6766, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.5 = fieldNorm(doc=6766)
       0.5 = coord(1/2)
   

4. Melin, G.; Persson, O.: Hotel cosmopolitan : a bibliometric study of collaboration at some European universities (1998) 2.03

   2.0257425 = sum of:
     2.0257425 = product of:
       4.051485 = sum of:
         4.051485 = weight(author_txt:persson in 1329) [ClassicSimilarity], result of:
           4.051485 = score(doc=1329,freq=1.0), product of:
             0.8306005 = queryWeight, product of:
               1.2212925 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.06971407 = queryNorm
             4.8777785 = fieldWeight in 1329, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.5 = fieldNorm(doc=1329)
       0.5 = coord(1/2)
   

5. Leydesdorff, L.; Persson, O.: Mapping the geography of science : distribution patterns and networks of relations among cities and institutes (2010) 2.03

   2.0257425 = sum of:
     2.0257425 = product of:
       4.051485 = sum of:
         4.051485 = weight(author_txt:persson in 691) [ClassicSimilarity], result of:
           4.051485 = score(doc=691,freq=1.0), product of:
             0.8306005 = queryWeight, product of:
               1.2212925 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.06971407 = queryNorm
             4.8777785 = fieldWeight in 691, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.5 = fieldNorm(doc=691)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Ahlgren, P.; Järvelin, K.: Measuring impact of twelve information scientists using the DCI index (2010) 0.36

   0.36066365 = sum of:
     0.36066365 = product of:
       1.081991 = sum of:
         0.011145797 = weight(abstract_txt:analysis in 580) [ClassicSimilarity], result of:
           0.011145797 = score(doc=580,freq=1.0), product of:
             0.039132997 = queryWeight, product of:
               1.0531732 = boost
               3.6456752 = idf(docFreq=3151, maxDocs=44421)
               0.010192139 = queryNorm
             0.28481838 = fieldWeight in 580, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6456752 = idf(docFreq=3151, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.018879669 = weight(abstract_txt:present in 580) [ClassicSimilarity], result of:
           0.018879669 = score(doc=580,freq=1.0), product of:
             0.05560732 = queryWeight, product of:
               1.255435 = boost
               4.3458266 = idf(docFreq=1564, maxDocs=44421)
               0.010192139 = queryNorm
             0.3395177 = fieldWeight in 580, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3458266 = idf(docFreq=1564, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.02052159 = weight(abstract_txt:research in 580) [ClassicSimilarity], result of:
           0.02052159 = score(doc=580,freq=2.0), product of:
             0.058786336 = queryWeight, product of:
               1.8254983 = boost
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.010192139 = queryNorm
             0.34908777 = fieldWeight in 580, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.082711175 = weight(abstract_txt:evaluation in 580) [ClassicSimilarity], result of:
           0.082711175 = score(doc=580,freq=4.0), product of:
             0.11816853 = queryWeight, product of:
               2.5881782 = boost
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.010192139 = queryNorm
             0.69994247 = fieldWeight in 580, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.09859036 = weight(abstract_txt:index in 580) [ClassicSimilarity], result of:
           0.09859036 = score(doc=580,freq=4.0), product of:
             0.13284606 = queryWeight, product of:
               2.7442114 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.010192139 = queryNorm
             0.7421399 = fieldWeight in 580, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.14756353 = weight(abstract_txt:impact in 580) [ClassicSimilarity], result of:
           0.14756353 = score(doc=580,freq=5.0), product of:
             0.1847164 = queryWeight, product of:
               3.96316 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.010192139 = queryNorm
             0.7988653 = fieldWeight in 580, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.3424036 = weight(abstract_txt:discounted in 580) [ClassicSimilarity], result of:
           0.3424036 = score(doc=580,freq=1.0), product of:
             0.48362038 = queryWeight, product of:
               5.2359505 = boost
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.010192139 = queryNorm
             0.7080008 = fieldWeight in 580, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
         0.3601753 = weight(abstract_txt:cumulated in 580) [ClassicSimilarity], result of:
           0.3601753 = score(doc=580,freq=1.0), product of:
             0.500213 = queryWeight, product of:
               5.3250136 = boost
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.010192139 = queryNorm
             0.72004384 = fieldWeight in 580, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.078125 = fieldNorm(doc=580)
       0.33333334 = coord(8/24)
   

2. Järvelin, K.; Persson, O.: ¬The DCI index : discounted cumulated impact-based research evaluation (2008) 0.19

   0.1890576 = sum of:
     0.1890576 = product of:
       0.7562304 = sum of:
         0.02010697 = weight(abstract_txt:research in 3694) [ClassicSimilarity], result of:
           0.02010697 = score(doc=3694,freq=3.0), product of:
             0.058786336 = queryWeight, product of:
               1.8254983 = boost
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.010192139 = queryNorm
             0.34203476 = fieldWeight in 3694, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.0625 = fieldNorm(doc=3694)
         0.03308447 = weight(abstract_txt:evaluation in 3694) [ClassicSimilarity], result of:
           0.03308447 = score(doc=3694,freq=1.0), product of:
             0.11816853 = queryWeight, product of:
               2.5881782 = boost
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.010192139 = queryNorm
             0.279977 = fieldWeight in 3694, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.0625 = fieldNorm(doc=3694)
         0.0881819 = weight(abstract_txt:index in 3694) [ClassicSimilarity], result of:
           0.0881819 = score(doc=3694,freq=5.0), product of:
             0.13284606 = queryWeight, product of:
               2.7442114 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.010192139 = queryNorm
             0.6637901 = fieldWeight in 3694, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=3694)
         0.05279393 = weight(abstract_txt:impact in 3694) [ClassicSimilarity], result of:
           0.05279393 = score(doc=3694,freq=1.0), product of:
             0.1847164 = queryWeight, product of:
               3.96316 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.010192139 = queryNorm
             0.28581074 = fieldWeight in 3694, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0625 = fieldNorm(doc=3694)
         0.2739229 = weight(abstract_txt:discounted in 3694) [ClassicSimilarity], result of:
           0.2739229 = score(doc=3694,freq=1.0), product of:
             0.48362038 = queryWeight, product of:
               5.2359505 = boost
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.010192139 = queryNorm
             0.56640065 = fieldWeight in 3694, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.0625 = fieldNorm(doc=3694)
         0.28814024 = weight(abstract_txt:cumulated in 3694) [ClassicSimilarity], result of:
           0.28814024 = score(doc=3694,freq=1.0), product of:
             0.500213 = queryWeight, product of:
               5.3250136 = boost
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.010192139 = queryNorm
             0.5760351 = fieldWeight in 3694, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.0625 = fieldNorm(doc=3694)
       0.25 = coord(6/24)
   

3. Kekäläinen, J.: Binary and graded relevance in IR evaluations : comparison of the effects on ranking of IR systems (2005) 0.15

   0.15335476 = sum of:
     0.15335476 = product of:
       1.2268381 = sum of:
         0.02225559 = weight(abstract_txt:based in 2036) [ClassicSimilarity], result of:
           0.02225559 = score(doc=2036,freq=1.0), product of:
             0.0894957 = queryWeight, product of:
               2.7586079 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.010192139 = queryNorm
             0.24867775 = fieldWeight in 2036, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.078125 = fieldNorm(doc=2036)
         0.48423183 = weight(abstract_txt:discounted in 2036) [ClassicSimilarity], result of:
           0.48423183 = score(doc=2036,freq=2.0), product of:
             0.48362038 = queryWeight, product of:
               5.2359505 = boost
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.010192139 = queryNorm
             1.0012643 = fieldWeight in 2036, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.078125 = fieldNorm(doc=2036)
         0.7203506 = weight(abstract_txt:cumulated in 2036) [ClassicSimilarity], result of:
           0.7203506 = score(doc=2036,freq=4.0), product of:
             0.500213 = queryWeight, product of:
               5.3250136 = boost
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.010192139 = queryNorm
             1.4400877 = fieldWeight in 2036, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.078125 = fieldNorm(doc=2036)
       0.125 = coord(3/24)
   

4. Wu, I.-C.: Toward supporting information-seeking and retrieval activities based on evolving topic-needs (2011) 0.11

   0.112106204 = sum of:
     0.112106204 = product of:
       0.5381098 = sum of:
         0.0066789743 = weight(abstract_txt:paper in 545) [ClassicSimilarity], result of:
           0.0066789743 = score(doc=545,freq=1.0), product of:
             0.035281215 = queryWeight, product of:
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.010192139 = queryNorm
             0.18930681 = fieldWeight in 545, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.0546875 = fieldNorm(doc=545)
         0.017593598 = weight(abstract_txt:research in 545) [ClassicSimilarity], result of:
           0.017593598 = score(doc=545,freq=3.0), product of:
             0.058786336 = queryWeight, product of:
               1.8254983 = boost
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.010192139 = queryNorm
             0.2992804 = fieldWeight in 545, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.0546875 = fieldNorm(doc=545)
         0.022031909 = weight(abstract_txt:based in 545) [ClassicSimilarity], result of:
           0.022031909 = score(doc=545,freq=2.0), product of:
             0.0894957 = queryWeight, product of:
               2.7586079 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.010192139 = queryNorm
             0.24617839 = fieldWeight in 545, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0546875 = fieldNorm(doc=545)
         0.23968254 = weight(abstract_txt:discounted in 545) [ClassicSimilarity], result of:
           0.23968254 = score(doc=545,freq=1.0), product of:
             0.48362038 = queryWeight, product of:
               5.2359505 = boost
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.010192139 = queryNorm
             0.49560058 = fieldWeight in 545, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.0546875 = fieldNorm(doc=545)
         0.25212273 = weight(abstract_txt:cumulated in 545) [ClassicSimilarity], result of:
           0.25212273 = score(doc=545,freq=1.0), product of:
             0.500213 = queryWeight, product of:
               5.3250136 = boost
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.010192139 = queryNorm
             0.5040307 = fieldWeight in 545, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.216561 = idf(docFreq=11, maxDocs=44421)
               0.0546875 = fieldNorm(doc=545)
       0.20833333 = coord(5/24)
   

5. Naderi, H.; Rumpler, B.: PERCIRS: a system to combine personalized and collaborative information retrieval (2010) 0.10

   0.09879227 = sum of:
     0.09879227 = product of:
       0.39516908 = sum of:
         0.017670903 = weight(abstract_txt:paper in 947) [ClassicSimilarity], result of:
           0.017670903 = score(doc=947,freq=7.0), product of:
             0.035281215 = queryWeight, product of:
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.010192139 = queryNorm
             0.5008587 = fieldWeight in 947, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.0546875 = fieldNorm(doc=947)
         0.01015767 = weight(abstract_txt:research in 947) [ClassicSimilarity], result of:
           0.01015767 = score(doc=947,freq=1.0), product of:
             0.058786336 = queryWeight, product of:
               1.8254983 = boost
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.010192139 = queryNorm
             0.17278963 = fieldWeight in 947, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.159582 = idf(docFreq=5124, maxDocs=44421)
               0.0546875 = fieldNorm(doc=947)
         0.100908294 = weight(abstract_txt:formula in 947) [ClassicSimilarity], result of:
           0.100908294 = score(doc=947,freq=2.0), product of:
             0.17113739 = queryWeight, product of:
               2.2024229 = boost
               7.62393 = idf(docFreq=58, maxDocs=44421)
               0.010192139 = queryNorm
             0.5896332 = fieldWeight in 947, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.62393 = idf(docFreq=58, maxDocs=44421)
               0.0546875 = fieldNorm(doc=947)
         0.20346037 = weight(abstract_txt:formulas in 947) [ClassicSimilarity], result of:
           0.20346037 = score(doc=947,freq=5.0), product of:
             0.20124893 = queryWeight, product of:
               2.3883338 = boost
               8.267481 = idf(docFreq=30, maxDocs=44421)
               0.010192139 = queryNorm
             1.0109886 = fieldWeight in 947, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               8.267481 = idf(docFreq=30, maxDocs=44421)
               0.0546875 = fieldNorm(doc=947)
         0.040939942 = weight(abstract_txt:evaluation in 947) [ClassicSimilarity], result of:
           0.040939942 = score(doc=947,freq=2.0), product of:
             0.11816853 = queryWeight, product of:
               2.5881782 = boost
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.010192139 = queryNorm
             0.34645385 = fieldWeight in 947, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.0546875 = fieldNorm(doc=947)
         0.022031909 = weight(abstract_txt:based in 947) [ClassicSimilarity], result of:
           0.022031909 = score(doc=947,freq=2.0), product of:
             0.0894957 = queryWeight, product of:
               2.7586079 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.010192139 = queryNorm
             0.24617839 = fieldWeight in 947, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0546875 = fieldNorm(doc=947)
       0.25 = coord(6/24)