Judul: Pseudo-Relevance Feedback on Retrieval Using Sentence Segmentation
Abstrak: A very large amount of information has stimulated the development of search engine to help users in finding information they need. To retrieve information that relevant to the user’s needs, users should be able to formulate queries correctly. Pseudo-relevance feedback is an automatically local analysis technique for improving queries. This technique takes the top n-ranked documents and takes the top x-ranked terms from relevant documents. The purpose of this research is to implement query expansion with pseudo-relevance feedback using sentence segmentation. There are two groups of documents, 1.000 agriculture documents and 93 medicine plants documents which are used. The test result shows that the use of medicine plants documents is better than agriculture documents. This is due to agriculture documents have a high enough similarity between documents. The performance of information retrieval with pseudo-relevance feedback using sentence segmentation gave good result with around 89% average precision for medicine plants documents and 56% for agriculture documents.
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Judul: Pseudo-Relevance Feedback on Retrieval Using Document Segmentation.
Abstrak: Web is the largest information source in the world, but the storage and effective information retrieval on the web is still a problem in this day. Pseudo-relevance feedback is automatically local analysis technique (relevance feedback technique without explicit input user). This technique takes the top n-ranked documents as the relevant documents and takes the top x-ranked terms from relevant documents. Basically, a document consist of any topics, so in the research, relevant documents substituted by a segment which represents a topic in the relevant document. The segment is taken by XML document tag, are <TITLE>, <AUTHOR> and <P> tag, since the text from those tags are usually represent a document. The visual block extraction phase (first step in VIsion based Page Segmentation algorithm), used in segmented the document, so the title of the research is Pseudo-Relevance Feedback on Retrieval Using Document Segmentation. This research done in six phases, there are retrieval initialization, document segmentation, segments selection, terms selection, final retrieval and retrieval output evaluation. The result of system performance is good, that is 0.5214. The test results show that the performance of the PRF based segmentation of documents and without PRF retrieval was not found significant differences. It is because of the taken documents and segments for expansion terms selection are not relevant, expanded queries are not exact representing the segment, the member of documents that are used in retrieval is relatively small, that are 1000 documents. Keywords: pseudo-relevance feedback, relevance feedback, page segmentation, text processing.
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Judul: Patomorfologi Jantung Ikan Mas (Cyprinus carpio) 24 Jam Pascakematian.
Abstrak: Pembusukan adalah proses yang terjadi akibat aktivitas autolisis dan mikroorganisme yang terjadi pada setiap makhluk hidup yang telah mati. Penelitian ini bertujuan untuk mempelajari patomorfologi jantung ikan mas (Cyprinus carpio) selama 24 jam kematian. Sebanyak 39 ekor ikan mas (Cyprinus carpio) dieutanasi pada suhu -13°C selama 60 menit. Perubahan makroskopis dan mikroskopis diamati pada 13 kelompok pengamatan, yaitu jam ke-0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, dan 24 setelah kematian. Hasil penelitian menunjukkan proses pembusukan diawali dengan terlihatnya lendir pada jam ke-2, kekakuan tubuh pada jam ke-6, bau busuk mulai tercium pada jam ke-8, serta kekeruhan mata dan serangga yang berdatangan pada jam ke-18 setelah kematian. Bentuk jantung tidak mengalami perubahan, konsistensi jantung menjadi lembek pada jam ke-6, dan perubahan warna pada jam ke-20. Pembusukan bulbus arteriosus dimulai dengan celah serabut otot dan kerusakan inti sel pada jam ke-4 dan kehadiran bakteri pada jam ke-22. Pembusukan ventrikel ditandai dengan kerusakan inti sel dan celah serabut otot yang mulai terlihat pada jam ke-2 dan kehadiran bakteri mulai jam ke-12. Pembusukan di ventrikel terjadi lebih cepat dibandingkan bulbus arteriosus. Hasil penelitian ini dapat digunakan sebagai acuan forensik veteriner untuk satwa akuatik dalam menentukan waktu kematian.
Keyword: pembusukan, autolisis, ikan mas, jantung, bulbus arteriosus, ventrikel