Judul: Sistem Perekomendasi Wisata Alam di Kabupaten Bogor Berbasis Mobile Menggunakan Metode Multi Criteria Collaborative Filtering.
Abstrak: Kabupaten Bogor merupakan salah satu daerah yang memiliki peluang dan daya tarik wisata yang tinggi. Selain memiliki lokasi yang strategis, kabupaten ini juga memiliki banyak objek wisata alam yang indah, akan tetapi kurangnya informasi membuat wisatawan tidak mengetahui objek wisata alam di Kabupaten Bogor yang sebaiknya dikunjungi. Oleh karena itu diperlukan suatu sistem perekomendasi. Penelitian ini bertujuan membangun suatu sistem perekomendasi wisata alam Kabupaten Bogor berbasis mobile dengan metode item-based collaborative filtering menggunakan sejumlah kriteria rating (multi criteria rating) sebagai data masukan. Penelitian ini menggunakan dua metode similarity, yaitu cosine similarity dan pearson-correlation similarity. Sistem perekomendasi mampu menampilkan daftar wisata alam beserta deskripsinya dan rekomendasi wisata alam berdasarkan rating user dari sejumlah kriteria. Sistem perekomendasi menghasilkan akurasi sebesar 0.525 dengan metode cosine similarity, dan 1.25 dengan metode pearson-correlation similarity.
Keyword: collaborative filtering, multi criteria rating, sistem perekomendasi, wisata alam

Judul: Sistem Perekomendasi Wisata Alam di Kabupaten Bogor Berbasis Mobile Menggunakan Metode Item-Based Collaborative Filtering
Abstrak: Bogor Regency is one of regions that has a high chance and tourist attraction. Beside a strategic location, Bogor Regency also has many beautiful natural tourism. The lack of information makes the tourists don’t know and visited natural tourism in Bogor Regency. Therefore we need a system of the recommenders. This study was conducted to establish the recommender systems Bogor Regency natural tourism which is expected to provide reference to travelers who want to / will visit Bogor Regency. The system is built with the recommenders using item-based collaborative filtering and the Android platform. The recommenders system is able to display a list of nature tourism with the description based on recommendations from the user.
Keyword: Bogor Agricultural University (IPB), recommender system, natural tourism, collaborative filtering

Judul: Pemurnian dan karakterisasi protein inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus (HCV) infection is the second most common chronic viral infection in the world with global prevalence. This infection is contribution to chronic hepatitis and liver cirrhosis, often leading to hepatocellular carcinoma. There is no effective drug and vaccine available against HCV. The current standard treatment, a combination of pegylated interferon-α with ribavirin, is limited by its suboptimal response rate in a significant patient population, side effects, and affordability. Therefore, development of effective drug is needed. One approach to find out the candidate of antiviral drug is to discover the inhibitor of enzyme that essential for virus replication, such as RNA helicase. Streptomyces chartreusis 5-095 produce the inhibitor of HCV RNA helicase. The aim of this study was to purify the protein inhibitor which has inhibition activity against ATPase activity of RNA helicase HCV from S. chartreusis 5-095. The supernatant of culture S. chartreusis 5-095 exhibited high inhibiton activity against ATPase activity of RNA helicase HCV (approximately 72%) at 10 days of incubation. The extracellular protein inhibitor was partially purified by procedures of precipitation with ammonium sulfate to 65% saturation and gel filtration (Sephadex G50) using methanol water solution (4:6) as an eluen. The purity of protein inhibitor was monitored by SDS PAGE. The protein inhibitor showed a relative molecular mass were estimated to be 14 kDa and increased the purity 23,08 fold than those of the crude protein. The specific activity and IC50 after purification were 13,1338 U/mg and 0,0767 mg/mL, respectively. The activity of purified protein inhibitor showed its stability over pH range from 5-8 and optimum at pH 7,4. The inhibition activity showed its stability up to 70% at temperature 100 oC. The purified protein inhibitor relatively stable its activity at storage in the range of -20 oC to room temperature for 35 days.
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