| dc.contributor | 圖資與檔案學刊 | |
| dc.creator (作者) | 吳政叡 | |
| dc.creator (作者) | Wu, Cheng-juei | |
| dc.date (日期) | 2002-11 | |
| dc.date.accessioned | 14-Jun-2019 14:20:30 (UTC+8) | - |
| dc.date.available | 14-Jun-2019 14:20:30 (UTC+8) | - |
| dc.date.issued (上傳時間) | 14-Jun-2019 14:20:30 (UTC+8) | - |
| dc.identifier.uri (URI) | http://nccur.lib.nccu.edu.tw/handle/140.119/123827 | - |
| dc.description.abstract (摘要) | 圖書館透過主題複分，一方面將資料加以更詳細的細分，來協助使用者更準確的找到其所想要的資料；另一方面也使資料能分到各細目下，以降低資料的集中度。為了探究主題複分的實際功效，作者自「中文圖書標題表」隨機抽取80個標題，然後利用國家圖書館NBINet來進行主題檢索分析。結果發現雖然每個複分標題平均記錄數目並不高，例如高筆數組(每個標題資料總數100以上)的總平均值為35.1筆。但這祇是表面的假象，進一步的分析發現，主題複分並未發揮其預期的功能，因為大多數的資料仍然集中在極少數的複分標題中。以高筆數組的標題來說，第1高複分記錄數目大多數超出平均值甚多，其記錄數目從55筆到3049筆，其中半數標題的第1高複分記錄數目超過200筆，祇有2個標題的第高複分記錄數目在100筆以下；所佔資料總筆數的百分比則從28.8%到98.5%。綜括來說，不但是絕大部分的資料，集中在極少數的標題上；而且在這些少數的超高使用頻率的標題(即高筆數組)中，大多數的資料又集中在極少數的複分標題中，高筆數組第1高複分的平均記錄數目高達541筆。由此看來，主題複分並未完全發揮實際功效，而且此部分的使用者資訊超載問題非常嚴重。 | |
| dc.description.abstract (摘要) | In this study, we randomly select 80 subjects from the Chinese Subject Headings as the searching terms on the NBINet, which is the largest bibliographic database in Taiwan, to measure the effectiveness of subject subdivision commonly used in the subject analysis. At first, it seems that subject subdivision works very well since the average number of records of subheadings is small. For example, the average number of records of subheadings is 35.1 for the group of high-usage subjects, which mean the number of records including each of them is more than 100. However, careful analysis exposes that it is only an illusion because most of the records are in few subdivisions actually. For instance, the number of records of the highest subdivision, ranging from 55 to 3049, is well over the average, ranging from 4.1 to 206.4, for every heading in the group of high-usage subjects. In addition, on average, these subdivisions occupy 81.1% of records, ranging from 28.8% to 98.5%. These experimental results clearly show that the effectiveness of subject subdivision is pretty bad in reality. This indicates the potential problem of information overload cannot be solved by the current practice of subject subdivision. | |
| dc.format.extent | 11158032 bytes | - |
| dc.format.mimetype | application/pdf | - |
| dc.relation (關聯) | 圖書與資訊學刊, 43, 1-9 | |
| dc.subject (關鍵詞) | 中文圖書標題表;主題分析;標題;資訊超載;全國圖書資訊網路系統 | |
| dc.subject (關鍵詞) | Chinese Subject Headings ; Subject analysis ; Subject heading ; Information overload ; NBINet | |
| dc.title (題名) | 主題複分效用分析：以NBINet為例 | |
| dc.title (題名) | Effectiveness analysis of subject subdivision: Using NBINet | |
| dc.type (資料類型) | article | |
