Judul: Perancangan Usability Sistem Visualisasi Keterkaitan Subjek Tesis Berbasis Web
Abstrak: Visualisasi data dengan beragam keunggulannya dapat menjadi solusi untuk memperoleh putusan informasi lebih cepat yang kerap kali dituntut pada institusi pendidikan. Penerapan teknik visualisasi data telah dilakukan terhadap data keterkaitan subjek karya ilmiah pada data tesis perpustakaan Institut Pertanian Bogor (IPB) melalui sistem Subject Term Relationship Visualization (STRV). Unsur interaksi manusia dan komputer dalam sistem tersebut belum diterapkan. Penelitian ini bertujuan meningkatkan unsur tersebut terutama komponen learnability dan memorable dengan membuat prototipe sistem melalui pendekatan user experience. Metode yang digunakan dalam penelitian ini adalah metode Wilson. Hasil yang diperoleh melalui penelitian ini adalah prototipe medium fidelity sebagai saran perbaikan sistem agar pengguna dapat mencapai tujuannya dengan lebih mudah. Evaluasi dilakukan dengan menggunakan menjawab 16 pernyataan visualization-specific heuristic evaluation. Hasil pengujian menunjukkan bahwa prototipe sistem telah berhasil meningkatkan komponen learnability dan memorable pada sistem.
Keyword: keterkaitan subjek, user experience, sistem visualisasi

Judul: Visualisasi keterhubungan antaristilah subjek pada metadata tesis IPB menggunakan peluang bersyarat
Abstrak: Bogor Agricultural University library has metadata for its collection. The metadata is used for searching and browsing. The activity of searching and browsing can be based on metadata fields, such as title, author, subject, etc. Searching on the subject or topic is an effective way if someone want to search document that fulfill his/her topic. When someone search on a subject, the result is only documents that has the subject. So, someone needs to pick an appropriate query to find the desirable result. The decision for picking a query is based on how good the knowledge of someone about the collection. It will be hard if someone does not know about the collection. In that case, we need an application that shows the relationship between the subject, so the related terms can be used as query suggestion for someone to decide his/her query. In order to make the view of relationship more interesting, understandable, and interactive, the relationship is visualized. The result of this research is an implementation of a Java desktop application that searches document based on subject and visualize subject terms relationship. The documents are from IPB thesis metadata. From 7445 documents, 7416 documents has subject field. Obtained 4496 unique terms from the 7416 document. From test result, the process to show document result and visualization is fast enough. The average time to show document result and visualization is one second.
Keyword: Visualization, Conditional probability, Terms relationship

Judul: Insecticidal Activity of Essential Oils Leaves of Cinnamomum spp. (Lauraceae) against Crocidolomia pavonana and Their Phytotoxicity on Broccoli Seedlings
Abstrak: Essential oils from leaves of 13 species of Cinnamomum were tested for their insecticidal activity on the cabbage head caterpillar Crocidolomia pavonana with leaf immerse method. The results showed that the treatment with 1% (w/v) essential oils leaves of C. celebicum, C. multiflorum, C. sintoc, and C. verum caused 21.45, 93.65, 60.30, and 76.10% mortality, respectively. Based on the results of phytotoxicity and insecticidal activity tests, C. multiflorum oil was further tested at 6 concentration levels. In all treatments, larval mortality has occurred at 24 hours after treatment (HAT) and increased at 48 HAT. LC50 of C. multiflorum oil at 24 and 48 HAT was 0.504 and 0.396%, respectively. The treatment with C. multiflorum oil at ≤0.31% did not inhibit the development of C. pavonana larvae. Determination of the chemical constituents of Cinnamomum oils were carried out by gas chromatography-mass spectrometry (GCMS). Totally, 345 compounds were identified. Methyleugenol constituted the main component (49.4%) of leaf essential oil of C. multiflorum and was assumed to be responsible for the insecticidal activity of the oil against C. pavonana larvae. LC50 of pure methyleugenol obtained at 0.365% (48 HAT) and 0.363% (72 HAT). The results showed that C. multiflorum was more effective with LC50 value equivalent to methyleugenol content of 0.32% (24 HAT) and 0.24% (48 HAT).
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