Document (#40117)

Author

Chowdhury, G.G.

Title

How to improve the sustainability of digital libraries and information services?

Source

Journal of the Association for Information Science and Technology. 67(2016) no.10, S.2379-2391

Year

2016

Abstract

Arguing that environmental sustainability is a growing concern for digital information systems and services, this article proposes a simple method for estimation of the energy and environmental costs of digital libraries and information services. It is shown that several factors contribute to the overall energy and environmental costs of information and communication technology (ICT) in general and digital information systems and services in particular. It is also shown that end-user energy costs play a key role in the overall environmental costs of a digital library or information service. It is argued that appropriate user research, transaction log analysis, user modeling, and better design and delivery of services can significantly reduce the user interaction time, and thus the environmental costs, of digital information systems and services, making them more sustainable.

Content

Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23599/full.

Similar documents (author)

1. Chowdhury, G.G.; Chowdhury, S.: ¬An overview of the information retrieval features of twenty digital libraries (2000) 5.65

   5.6450562 = sum of:
     5.6450562 = weight(author_txt:chowdhury in 519) [ClassicSimilarity], result of:
       5.6450562 = fieldWeight in 519, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         7.983315 = idf(docFreq=40, maxDocs=44218)
         0.5 = fieldNorm(doc=519)
   

2. Chowdhury, S.; Chowdhury, G.G.: Text retrieval system : an overview (1992) 5.65

   5.6450562 = sum of:
     5.6450562 = weight(author_txt:chowdhury in 6508) [ClassicSimilarity], result of:
       5.6450562 = fieldWeight in 6508, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         7.983315 = idf(docFreq=40, maxDocs=44218)
         0.5 = fieldNorm(doc=6508)
   

3. Chowdhury, S.; Chowdhury, G.G.: Development of library management system using Micro-CDS/ISIS (1992) 5.65

   5.6450562 = sum of:
     5.6450562 = weight(author_txt:chowdhury in 440) [ClassicSimilarity], result of:
       5.6450562 = fieldWeight in 440, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         7.983315 = idf(docFreq=40, maxDocs=44218)
         0.5 = fieldNorm(doc=440)
   

4. Chowdhury, G.G.; Chowdhury, S.: Text retrieval and library management software in India (1994) 5.65

   5.6450562 = sum of:
     5.6450562 = weight(author_txt:chowdhury in 1542) [ClassicSimilarity], result of:
       5.6450562 = fieldWeight in 1542, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         7.983315 = idf(docFreq=40, maxDocs=44218)
         0.5 = fieldNorm(doc=1542)
   

5. Chowdhury, S.; Chowdhury, G.G.: Using DDC to create a visual knowledge map as an aid to online information retrieval (2004) 5.65

   5.6450562 = sum of:
     5.6450562 = weight(author_txt:chowdhury in 2643) [ClassicSimilarity], result of:
       5.6450562 = fieldWeight in 2643, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         7.983315 = idf(docFreq=40, maxDocs=44218)
         0.5 = fieldNorm(doc=2643)
   

Similar documents (content)

1. Chowdhury, G.: ¬An agenda for green information retrieval research (2012) 0.68

   0.6785442 = sum of:
     0.6785442 = product of:
       1.2116861 = sum of:
         0.03463672 = weight(abstract_txt:play in 2724) [ClassicSimilarity], result of:
           0.03463672 = score(doc=2724,freq=2.0), product of:
             0.076129474 = queryWeight, product of:
               1.0408492 = boost
               5.8827567 = idf(docFreq=334, maxDocs=44218)
               0.012433235 = queryNorm
             0.45497125 = fieldWeight in 2724, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.8827567 = idf(docFreq=334, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.029934507 = weight(abstract_txt:reduce in 2724) [ClassicSimilarity], result of:
           0.029934507 = score(doc=2724,freq=1.0), product of:
             0.087026805 = queryWeight, product of:
               1.1128533 = boost
               6.2897153 = idf(docFreq=222, maxDocs=44218)
               0.012433235 = queryNorm
             0.3439688 = fieldWeight in 2724, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2897153 = idf(docFreq=222, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.030594364 = weight(abstract_txt:concern in 2724) [ClassicSimilarity], result of:
           0.030594364 = score(doc=2724,freq=1.0), product of:
             0.08830106 = queryWeight, product of:
               1.120971 = boost
               6.335595 = idf(docFreq=212, maxDocs=44218)
               0.012433235 = queryNorm
             0.34647787 = fieldWeight in 2724, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.335595 = idf(docFreq=212, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.013022442 = weight(abstract_txt:libraries in 2724) [ClassicSimilarity], result of:
           0.013022442 = score(doc=2724,freq=1.0), product of:
             0.06295206 = queryWeight, product of:
               1.3385401 = boost
               3.782635 = idf(docFreq=2735, maxDocs=44218)
               0.012433235 = queryNorm
             0.20686285 = fieldWeight in 2724, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.782635 = idf(docFreq=2735, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.054699406 = weight(abstract_txt:sustainable in 2724) [ClassicSimilarity], result of:
           0.054699406 = score(doc=2724,freq=1.0), product of:
             0.13007486 = queryWeight, product of:
               1.3605299 = boost
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.012433235 = queryNorm
             0.4205225 = fieldWeight in 2724, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.011088076 = weight(abstract_txt:that in 2724) [ClassicSimilarity], result of:
           0.011088076 = score(doc=2724,freq=3.0), product of:
             0.04940323 = queryWeight, product of:
               1.676946 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.012433235 = queryNorm
             0.22444029 = fieldWeight in 2724, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.035112087 = weight(abstract_txt:systems in 2724) [ClassicSimilarity], result of:
           0.035112087 = score(doc=2724,freq=6.0), product of:
             0.076824434 = queryWeight, product of:
               1.8110136 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.012433235 = queryNorm
             0.45704323 = fieldWeight in 2724, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.05594465 = weight(abstract_txt:overall in 2724) [ClassicSimilarity], result of:
           0.05594465 = score(doc=2724,freq=2.0), product of:
             0.13204157 = queryWeight, product of:
               1.9385711 = boost
               5.478287 = idf(docFreq=501, maxDocs=44218)
               0.012433235 = queryNorm
             0.42368966 = fieldWeight in 2724, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.478287 = idf(docFreq=501, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.120243795 = weight(abstract_txt:sustainability in 2724) [ClassicSimilarity], result of:
           0.120243795 = score(doc=2724,freq=1.0), product of:
             0.27707037 = queryWeight, product of:
               2.8081574 = boost
               7.935687 = idf(docFreq=42, maxDocs=44218)
               0.012433235 = queryNorm
             0.43398288 = fieldWeight in 2724, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.935687 = idf(docFreq=42, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.020696329 = weight(abstract_txt:information in 2724) [ClassicSimilarity], result of:
           0.020696329 = score(doc=2724,freq=3.0), product of:
             0.09025255 = queryWeight, product of:
               2.998404 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.012433235 = queryNorm
             0.22931573 = fieldWeight in 2724, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.15654726 = weight(abstract_txt:energy in 2724) [ClassicSimilarity], result of:
           0.15654726 = score(doc=2724,freq=1.0), product of:
             0.37816012 = queryWeight, product of:
               4.0179996 = boost
               7.5697527 = idf(docFreq=61, maxDocs=44218)
               0.012433235 = queryNorm
             0.41397086 = fieldWeight in 2724, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5697527 = idf(docFreq=61, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.15086651 = weight(abstract_txt:services in 2724) [ClassicSimilarity], result of:
           0.15086651 = score(doc=2724,freq=8.0), product of:
             0.23242739 = queryWeight, product of:
               4.4548254 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.012433235 = queryNorm
             0.64909095 = fieldWeight in 2724, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.083043106 = weight(abstract_txt:digital in 2724) [ClassicSimilarity], result of:
           0.083043106 = score(doc=2724,freq=2.0), product of:
             0.2478075 = queryWeight, product of:
               4.5998564 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.012433235 = queryNorm
             0.33511135 = fieldWeight in 2724, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
         0.41525692 = weight(abstract_txt:environmental in 2724) [ClassicSimilarity], result of:
           0.41525692 = score(doc=2724,freq=4.0), product of:
             0.54123545 = queryWeight, product of:
               6.205682 = boost
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.012433235 = queryNorm
             0.767239 = fieldWeight in 2724, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.0546875 = fieldNorm(doc=2724)
       0.56 = coord(14/25)
   

2. Chowdhury, G.: Carbon footprint of the knowledge sector : what's the future? (2010) 0.33

   0.32659316 = sum of:
     0.32659316 = product of:
       0.9072032 = sum of:
         0.054699406 = weight(abstract_txt:sustainable in 4152) [ClassicSimilarity], result of:
           0.054699406 = score(doc=4152,freq=1.0), product of:
             0.13007486 = queryWeight, product of:
               1.3605299 = boost
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.012433235 = queryNorm
             0.4205225 = fieldWeight in 4152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.014314644 = weight(abstract_txt:that in 4152) [ClassicSimilarity], result of:
           0.014314644 = score(doc=4152,freq=5.0), product of:
             0.04940323 = queryWeight, product of:
               1.676946 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.012433235 = queryNorm
             0.28975117 = fieldWeight in 4152, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.014334448 = weight(abstract_txt:systems in 4152) [ClassicSimilarity], result of:
           0.014334448 = score(doc=4152,freq=1.0), product of:
             0.076824434 = queryWeight, product of:
               1.8110136 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.012433235 = queryNorm
             0.1865871 = fieldWeight in 4152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.041975353 = weight(abstract_txt:shown in 4152) [ClassicSimilarity], result of:
           0.041975353 = score(doc=4152,freq=1.0), product of:
             0.13736556 = queryWeight, product of:
               1.977267 = boost
               5.58764 = idf(docFreq=449, maxDocs=44218)
               0.012433235 = queryNorm
             0.30557406 = fieldWeight in 4152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.58764 = idf(docFreq=449, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.011949032 = weight(abstract_txt:information in 4152) [ClassicSimilarity], result of:
           0.011949032 = score(doc=4152,freq=1.0), product of:
             0.09025255 = queryWeight, product of:
               2.998404 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.012433235 = queryNorm
             0.1323955 = fieldWeight in 4152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.15654726 = weight(abstract_txt:energy in 4152) [ClassicSimilarity], result of:
           0.15654726 = score(doc=4152,freq=1.0), product of:
             0.37816012 = queryWeight, product of:
               4.0179996 = boost
               7.5697527 = idf(docFreq=61, maxDocs=44218)
               0.012433235 = queryNorm
             0.41397086 = fieldWeight in 4152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5697527 = idf(docFreq=61, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.11744069 = weight(abstract_txt:digital in 4152) [ClassicSimilarity], result of:
           0.11744069 = score(doc=4152,freq=4.0), product of:
             0.2478075 = queryWeight, product of:
               4.5998564 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.012433235 = queryNorm
             0.47391903 = fieldWeight in 4152, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.20231141 = weight(abstract_txt:costs in 4152) [ClassicSimilarity], result of:
           0.20231141 = score(doc=4152,freq=2.0), product of:
             0.4222133 = queryWeight, product of:
               5.4810324 = boost
               6.195629 = idf(docFreq=244, maxDocs=44218)
               0.012433235 = queryNorm
             0.47916874 = fieldWeight in 4152, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.195629 = idf(docFreq=244, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
         0.293631 = weight(abstract_txt:environmental in 4152) [ClassicSimilarity], result of:
           0.293631 = score(doc=4152,freq=2.0), product of:
             0.54123545 = queryWeight, product of:
               6.205682 = boost
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.012433235 = queryNorm
             0.54251987 = fieldWeight in 4152, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.0546875 = fieldNorm(doc=4152)
       0.36 = coord(9/25)
   

3. Chowdhury, G.: Building environmentally sustainable information services : a green is research agenda (2012) 0.20

   0.20093806 = sum of:
     0.20093806 = product of:
       0.55816126 = sum of:
         0.034210864 = weight(abstract_txt:reduce in 42) [ClassicSimilarity], result of:
           0.034210864 = score(doc=42,freq=1.0), product of:
             0.087026805 = queryWeight, product of:
               1.1128533 = boost
               6.2897153 = idf(docFreq=222, maxDocs=44218)
               0.012433235 = queryNorm
             0.3931072 = fieldWeight in 42, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2897153 = idf(docFreq=222, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.034964986 = weight(abstract_txt:concern in 42) [ClassicSimilarity], result of:
           0.034964986 = score(doc=42,freq=1.0), product of:
             0.08830106 = queryWeight, product of:
               1.120971 = boost
               6.335595 = idf(docFreq=212, maxDocs=44218)
               0.012433235 = queryNorm
             0.3959747 = fieldWeight in 42, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.335595 = idf(docFreq=212, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.03969499 = weight(abstract_txt:argued in 42) [ClassicSimilarity], result of:
           0.03969499 = score(doc=42,freq=1.0), product of:
             0.096095 = queryWeight, product of:
               1.1693965 = boost
               6.609291 = idf(docFreq=161, maxDocs=44218)
               0.012433235 = queryNorm
             0.4130807 = fieldWeight in 42, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.609291 = idf(docFreq=161, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.062513605 = weight(abstract_txt:sustainable in 42) [ClassicSimilarity], result of:
           0.062513605 = score(doc=42,freq=1.0), product of:
             0.13007486 = queryWeight, product of:
               1.3605299 = boost
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.012433235 = queryNorm
             0.48059714 = fieldWeight in 42, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.016359594 = weight(abstract_txt:that in 42) [ClassicSimilarity], result of:
           0.016359594 = score(doc=42,freq=5.0), product of:
             0.04940323 = queryWeight, product of:
               1.676946 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.012433235 = queryNorm
             0.3311442 = fieldWeight in 42, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.016382227 = weight(abstract_txt:systems in 42) [ClassicSimilarity], result of:
           0.016382227 = score(doc=42,freq=1.0), product of:
             0.076824434 = queryWeight, product of:
               1.8110136 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.012433235 = queryNorm
             0.2132424 = fieldWeight in 42, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.030535825 = weight(abstract_txt:information in 42) [ClassicSimilarity], result of:
           0.030535825 = score(doc=42,freq=5.0), product of:
             0.09025255 = queryWeight, product of:
               2.998404 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.012433235 = queryNorm
             0.33833754 = fieldWeight in 42, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.08620944 = weight(abstract_txt:services in 42) [ClassicSimilarity], result of:
           0.08620944 = score(doc=42,freq=2.0), product of:
             0.23242739 = queryWeight, product of:
               4.4548254 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.012433235 = queryNorm
             0.37090912 = fieldWeight in 42, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
         0.23728967 = weight(abstract_txt:environmental in 42) [ClassicSimilarity], result of:
           0.23728967 = score(doc=42,freq=1.0), product of:
             0.54123545 = queryWeight, product of:
               6.205682 = boost
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.012433235 = queryNorm
             0.43842226 = fieldWeight in 42, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.0625 = fieldNorm(doc=42)
       0.36 = coord(9/25)
   

4. Pack, T.: Trends in digital document delivery (1996) 0.19

   0.1859258 = sum of:
     0.1859258 = product of:
       0.58101815 = sum of:
         0.04343985 = weight(abstract_txt:growing in 5498) [ClassicSimilarity], result of:
           0.04343985 = score(doc=5498,freq=1.0), product of:
             0.07027117 = queryWeight, product of:
               5.6518817 = idf(docFreq=421, maxDocs=44218)
               0.012433235 = queryNorm
             0.61817455 = fieldWeight in 5498, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6518817 = idf(docFreq=421, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.092351936 = weight(abstract_txt:delivery in 5498) [ClassicSimilarity], result of:
           0.092351936 = score(doc=5498,freq=3.0), product of:
             0.08055798 = queryWeight, product of:
               1.0706948 = boost
               6.0514402 = idf(docFreq=282, maxDocs=44218)
               0.012433235 = queryNorm
             1.1464033 = fieldWeight in 5498, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.0514402 = idf(docFreq=282, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.026044885 = weight(abstract_txt:libraries in 5498) [ClassicSimilarity], result of:
           0.026044885 = score(doc=5498,freq=1.0), product of:
             0.06295206 = queryWeight, product of:
               1.3385401 = boost
               3.782635 = idf(docFreq=2735, maxDocs=44218)
               0.012433235 = queryNorm
             0.4137257 = fieldWeight in 5498, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.782635 = idf(docFreq=2735, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.028668895 = weight(abstract_txt:systems in 5498) [ClassicSimilarity], result of:
           0.028668895 = score(doc=5498,freq=1.0), product of:
             0.076824434 = queryWeight, product of:
               1.8110136 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.012433235 = queryNorm
             0.3731742 = fieldWeight in 5498, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.083950706 = weight(abstract_txt:shown in 5498) [ClassicSimilarity], result of:
           0.083950706 = score(doc=5498,freq=1.0), product of:
             0.13736556 = queryWeight, product of:
               1.977267 = boost
               5.58764 = idf(docFreq=449, maxDocs=44218)
               0.012433235 = queryNorm
             0.6111481 = fieldWeight in 5498, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.58764 = idf(docFreq=449, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.033796966 = weight(abstract_txt:information in 5498) [ClassicSimilarity], result of:
           0.033796966 = score(doc=5498,freq=2.0), product of:
             0.09025255 = queryWeight, product of:
               2.998404 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.012433235 = queryNorm
             0.37447104 = fieldWeight in 5498, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.10667874 = weight(abstract_txt:services in 5498) [ClassicSimilarity], result of:
           0.10667874 = score(doc=5498,freq=1.0), product of:
             0.23242739 = queryWeight, product of:
               4.4548254 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.012433235 = queryNorm
             0.45897663 = fieldWeight in 5498, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
         0.16608621 = weight(abstract_txt:digital in 5498) [ClassicSimilarity], result of:
           0.16608621 = score(doc=5498,freq=2.0), product of:
             0.2478075 = queryWeight, product of:
               4.5998564 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.012433235 = queryNorm
             0.6702227 = fieldWeight in 5498, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.109375 = fieldNorm(doc=5498)
       0.32 = coord(8/25)
   

5. Kubiszewski, I.; Cleveland, C.J.: ¬The Encyclopedia of Earth (2007) 0.16

   0.15822425 = sum of:
     0.15822425 = product of:
       0.5650866 = sum of:
         0.039071 = weight(abstract_txt:sustainable in 1170) [ClassicSimilarity], result of:
           0.039071 = score(doc=1170,freq=1.0), product of:
             0.13007486 = queryWeight, product of:
               1.3605299 = boost
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.012433235 = queryNorm
             0.3003732 = fieldWeight in 1170, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.689554 = idf(docFreq=54, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
         0.010224747 = weight(abstract_txt:that in 1170) [ClassicSimilarity], result of:
           0.010224747 = score(doc=1170,freq=5.0), product of:
             0.04940323 = queryWeight, product of:
               1.676946 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.012433235 = queryNorm
             0.20696513 = fieldWeight in 1170, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
         0.01717943 = weight(abstract_txt:user in 1170) [ClassicSimilarity], result of:
           0.01717943 = score(doc=1170,freq=1.0), product of:
             0.119394094 = queryWeight, product of:
               2.6069508 = boost
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.012433235 = queryNorm
             0.14388844 = fieldWeight in 1170, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
         0.017070046 = weight(abstract_txt:information in 1170) [ClassicSimilarity], result of:
           0.017070046 = score(doc=1170,freq=4.0), product of:
             0.09025255 = queryWeight, product of:
               2.998404 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.012433235 = queryNorm
             0.18913643 = fieldWeight in 1170, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
         0.111819476 = weight(abstract_txt:energy in 1170) [ClassicSimilarity], result of:
           0.111819476 = score(doc=1170,freq=1.0), product of:
             0.37816012 = queryWeight, product of:
               4.0179996 = boost
               7.5697527 = idf(docFreq=61, maxDocs=44218)
               0.012433235 = queryNorm
             0.29569346 = fieldWeight in 1170, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5697527 = idf(docFreq=61, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
         0.03809955 = weight(abstract_txt:services in 1170) [ClassicSimilarity], result of:
           0.03809955 = score(doc=1170,freq=1.0), product of:
             0.23242739 = queryWeight, product of:
               4.4548254 = boost
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.012433235 = queryNorm
             0.16392022 = fieldWeight in 1170, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1963577 = idf(docFreq=1808, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
         0.3316224 = weight(abstract_txt:environmental in 1170) [ClassicSimilarity], result of:
           0.3316224 = score(doc=1170,freq=5.0), product of:
             0.54123545 = queryWeight, product of:
               6.205682 = boost
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.012433235 = queryNorm
             0.61271375 = fieldWeight in 1170, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               7.014756 = idf(docFreq=107, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1170)
       0.28 = coord(7/25)