Document (#20641)

Author

Barth, A.
Westermann, U.
Pasucha, B.

Title

Messenger and S4 : a comparison of structure search system

Source

Journal of chemical information and computer sciences. 34(1994) no.4, S.714-722

Year

1994

Abstract

Large chemical structure databases available through online hosts need special software for substructure searching. Describes a study which compares the systems of STN International (messenger) and DIALOG (S4) with respect to: architecture, functionality and performance. The 2 systems are very similar with respect to their search capabilities and many features are almost identical. The number of hits differ slightly due to the different treatment of some special chemical effects. The average search times are faster for the S4 system than for the Messenger system but the Messenger system can be adopted to large files by using the search engine technology. S4 is very well suited to the Beilstein and Gmelin databases, while Messenger provides more general capabilities

Field

Chemie

Similar documents (author)

1. Barth, G.: Künstliche Intelligenz : Perspektive einer wissenschaftlichen Disziplin und Realisierungsmöglichkeiten (1991) 5.58

   5.5805492 = sum of:
     5.5805492 = weight(author_txt:barth in 3064) [ClassicSimilarity], result of:
       5.5805492 = fieldWeight in 3064, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.928879 = idf(docFreq=15, maxDocs=44421)
         0.625 = fieldNorm(doc=3064)
   

2. Barth, A.: Elektronische Information und Publikation : Strategie und Konzepte aus der Perspektive des FIZ Karlsruhe (1995) 5.58

   5.5805492 = sum of:
     5.5805492 = weight(author_txt:barth in 3084) [ClassicSimilarity], result of:
       5.5805492 = fieldWeight in 3084, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.928879 = idf(docFreq=15, maxDocs=44421)
         0.625 = fieldNorm(doc=3084)
   

3. Barth, A.: AutoDoc : an automated document delivery broker system at FIZ Karlsruhe (1998) 5.58

   5.5805492 = sum of:
     5.5805492 = weight(author_txt:barth in 3997) [ClassicSimilarity], result of:
       5.5805492 = fieldWeight in 3997, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.928879 = idf(docFreq=15, maxDocs=44421)
         0.625 = fieldNorm(doc=3997)
   

4. Barth, A.P.: Algorithmik für Einsteiger : Für Studierende, Lehrer und Schüler in den Fächern Mathematik und Informatik (2003) 5.58

   5.5805492 = sum of:
     5.5805492 = weight(author_txt:barth in 2487) [ClassicSimilarity], result of:
       5.5805492 = fieldWeight in 2487, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.928879 = idf(docFreq=15, maxDocs=44421)
         0.625 = fieldNorm(doc=2487)
   

5. Barth, T.: Inverse Panopticon : Digitalisierung & Transhumanismus [Transhumanismus II] (2020) 5.58

   5.5805492 = sum of:
     5.5805492 = weight(author_txt:barth in 592) [ClassicSimilarity], result of:
       5.5805492 = fieldWeight in 592, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.928879 = idf(docFreq=15, maxDocs=44421)
         0.625 = fieldNorm(doc=592)
   

Similar documents (content)

1. Binder, G.; Stahl, M.; Faulborn, L.: Vergleichsuntersuchung MESSENGER-FULCRUM (2000) 0.14

   0.13541459 = sum of:
     0.13541459 = product of:
       1.1284549 = sum of:
         0.013714409 = weight(abstract_txt:systems in 5885) [ClassicSimilarity], result of:
           0.013714409 = score(doc=5885,freq=1.0), product of:
             0.042884644 = queryWeight, product of:
               1.0899976 = boost
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.011533796 = queryNorm
             0.31979766 = fieldWeight in 5885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.09375 = fieldNorm(doc=5885)
         0.0265129 = weight(abstract_txt:system in 5885) [ClassicSimilarity], result of:
           0.0265129 = score(doc=5885,freq=1.0), product of:
             0.08384913 = queryWeight, product of:
               2.1554549 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.011533796 = queryNorm
             0.31619766 = fieldWeight in 5885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.09375 = fieldNorm(doc=5885)
         1.0882276 = weight(abstract_txt:messenger in 5885) [ClassicSimilarity], result of:
           1.0882276 = score(doc=5885,freq=2.0), product of:
             0.85303515 = queryWeight, product of:
               7.686491 = boost
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.011533796 = queryNorm
             1.2757125 = fieldWeight in 5885, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.09375 = fieldNorm(doc=5885)
       0.12 = coord(3/25)
   

2. Stock, M.; Stock, W.G.: Intellectual property information : A comparative analysis of main information providers (2006) 0.10

   0.1015147 = sum of:
     0.1015147 = product of:
       0.3625525 = sum of:
         0.052237734 = weight(abstract_txt:functionality in 335) [ClassicSimilarity], result of:
           0.052237734 = score(doc=335,freq=2.0), product of:
             0.074405916 = queryWeight, product of:
               1.0152276 = boost
               6.35436 = idf(docFreq=209, maxDocs=44421)
               0.011533796 = queryNorm
             0.7020643 = fieldWeight in 335, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.35436 = idf(docFreq=209, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
         0.042004723 = weight(abstract_txt:dialog in 335) [ClassicSimilarity], result of:
           0.042004723 = score(doc=335,freq=1.0), product of:
             0.08106375 = queryWeight, product of:
               1.0596758 = boost
               6.6325636 = idf(docFreq=158, maxDocs=44421)
               0.011533796 = queryNorm
             0.51816905 = fieldWeight in 335, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6325636 = idf(docFreq=158, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
         0.023831857 = weight(abstract_txt:structure in 335) [ClassicSimilarity], result of:
           0.023831857 = score(doc=335,freq=1.0), product of:
             0.06999653 = queryWeight, product of:
               1.3925568 = boost
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.011533796 = queryNorm
             0.34047198 = fieldWeight in 335, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
         0.035535943 = weight(abstract_txt:special in 335) [ClassicSimilarity], result of:
           0.035535943 = score(doc=335,freq=1.0), product of:
             0.09135868 = queryWeight, product of:
               1.5909245 = boost
               4.978838 = idf(docFreq=830, maxDocs=44421)
               0.011533796 = queryNorm
             0.38897172 = fieldWeight in 335, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.978838 = idf(docFreq=830, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
         0.031245751 = weight(abstract_txt:system in 335) [ClassicSimilarity], result of:
           0.031245751 = score(doc=335,freq=2.0), product of:
             0.08384913 = queryWeight, product of:
               2.1554549 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.011533796 = queryNorm
             0.37264252 = fieldWeight in 335, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
         0.103329234 = weight(abstract_txt:chemical in 335) [ClassicSimilarity], result of:
           0.103329234 = score(doc=335,freq=1.0), product of:
             0.18611729 = queryWeight, product of:
               2.2707431 = boost
               7.1063476 = idf(docFreq=98, maxDocs=44421)
               0.011533796 = queryNorm
             0.5551834 = fieldWeight in 335, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1063476 = idf(docFreq=98, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
         0.07436725 = weight(abstract_txt:search in 335) [ClassicSimilarity], result of:
           0.07436725 = score(doc=335,freq=7.0), product of:
             0.09844713 = queryWeight, product of:
               2.3355608 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.011533796 = queryNorm
             0.7554029 = fieldWeight in 335, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.078125 = fieldNorm(doc=335)
       0.28 = coord(7/25)
   

3. Schrenk, P.: Gesamtnote 1 für Signal - Telegram-Defizite bei Sicherheit und Privatsphäre : Signal und Telegram im Test (2022) 0.09

   0.08885341 = sum of:
     0.08885341 = product of:
       2.2213354 = sum of:
         2.2213354 = weight(abstract_txt:messenger in 1487) [ClassicSimilarity], result of:
           2.2213354 = score(doc=1487,freq=3.0), product of:
             0.85303515 = queryWeight, product of:
               7.686491 = boost
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.011533796 = queryNorm
             2.6040373 = fieldWeight in 1487, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.15625 = fieldNorm(doc=1487)
       0.04 = coord(1/25)
   

4. Heller, S.R.: Similarity in organic chemistry : a summary of the Beilstein Institute Conference (1992) 0.09

   0.0882162 = sum of:
     0.0882162 = product of:
       0.735135 = sum of:
         0.05942438 = weight(abstract_txt:databases in 3727) [ClassicSimilarity], result of:
           0.05942438 = score(doc=3727,freq=1.0), product of:
             0.07180261 = queryWeight, product of:
               1.410408 = boost
               4.413907 = idf(docFreq=1461, maxDocs=44421)
               0.011533796 = queryNorm
             0.8276076 = fieldWeight in 3727, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.413907 = idf(docFreq=1461, maxDocs=44421)
               0.1875 = fieldNorm(doc=3727)
         0.42772052 = weight(title_txt:beilstein in 3727) [ClassicSimilarity], result of:
           0.42772052 = score(doc=3727,freq=1.0), product of:
             0.17537513 = queryWeight, product of:
               1.5586323 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.011533796 = queryNorm
             2.4388893 = fieldWeight in 3727, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.25 = fieldNorm(doc=3727)
         0.24799015 = weight(abstract_txt:chemical in 3727) [ClassicSimilarity], result of:
           0.24799015 = score(doc=3727,freq=1.0), product of:
             0.18611729 = queryWeight, product of:
               2.2707431 = boost
               7.1063476 = idf(docFreq=98, maxDocs=44421)
               0.011533796 = queryNorm
             1.3324401 = fieldWeight in 3727, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1063476 = idf(docFreq=98, maxDocs=44421)
               0.1875 = fieldNorm(doc=3727)
       0.12 = coord(3/25)
   

5. Lo, M.L.: Recent strategies for retrieving chemical structure information on the Web (1997) 0.07

   0.07126128 = sum of:
     0.07126128 = product of:
       0.35630637 = sum of:
         0.028598227 = weight(abstract_txt:structure in 3611) [ClassicSimilarity], result of:
           0.028598227 = score(doc=3611,freq=1.0), product of:
             0.06999653 = queryWeight, product of:
               1.3925568 = boost
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.011533796 = queryNorm
             0.40856636 = fieldWeight in 3611, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.09375 = fieldNorm(doc=3611)
         0.02971219 = weight(abstract_txt:databases in 3611) [ClassicSimilarity], result of:
           0.02971219 = score(doc=3611,freq=1.0), product of:
             0.07180261 = queryWeight, product of:
               1.410408 = boost
               4.413907 = idf(docFreq=1461, maxDocs=44421)
               0.011533796 = queryNorm
             0.4138038 = fieldWeight in 3611, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.413907 = idf(docFreq=1461, maxDocs=44421)
               0.09375 = fieldNorm(doc=3611)
         0.16039519 = weight(abstract_txt:substructure in 3611) [ClassicSimilarity], result of:
           0.16039519 = score(doc=3611,freq=1.0), product of:
             0.17537513 = queryWeight, product of:
               1.5586323 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.011533796 = queryNorm
             0.91458344 = fieldWeight in 3611, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.09375 = fieldNorm(doc=3611)
         0.10387095 = weight(abstract_txt:capabilities in 3611) [ClassicSimilarity], result of:
           0.10387095 = score(doc=3611,freq=2.0), product of:
             0.13127132 = queryWeight, product of:
               1.907039 = boost
               5.9681263 = idf(docFreq=308, maxDocs=44421)
               0.011533796 = queryNorm
             0.7912692 = fieldWeight in 3611, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.9681263 = idf(docFreq=308, maxDocs=44421)
               0.09375 = fieldNorm(doc=3611)
         0.033729814 = weight(abstract_txt:search in 3611) [ClassicSimilarity], result of:
           0.033729814 = score(doc=3611,freq=1.0), product of:
             0.09844713 = queryWeight, product of:
               2.3355608 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.011533796 = queryNorm
             0.34261855 = fieldWeight in 3611, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.09375 = fieldNorm(doc=3611)
       0.2 = coord(5/25)