Judul: Clustering Dokumen Skripsi Berdasarkan Abstrak dengan Menggunakan Bisecting K-Means
Abstrak: The need of thesis data searching increases every year along with the increase in the number of students. Search of reference by tracing documents one by one takes a lot of time. Therefore, a system that is capable of clustering documents automatically is necessary. This study developed a system to perform clustering of theses automatically based on their abstracts. It used bisecting Kmeans method to cluster the data. The data in this research were from IPB’s Computer Science bachelor theses, comprising 78 abstracts in Indonesian and 113 abstracts in English. The result showed that clustering the documents using bisecting K-means could be done with the best value of i threshold (internal cluster distance) of 0.67 for the Indonesian abstracts resulting in a rand index of 0.867, while the best i threshold value for the English abstracts was 0.55 resulting in a rand index of 0.862.
Keyword: Bogor Agricultural University (IPB), clustering, Bisecting K-Means

Judul: Clustering konsep dokumen berbahasa Indonesia menggunakan Bisecting K-means
Abstrak: In recent years, we have seen a tremendous growth in the volume of text documents available on the Internet, digital libraries, news sources, and company-wide intranets. This has led to an increased interest in developing methods that can efficiently categorize and retrieve relevant information. Concept indexing (CI) is a dimensionality reduction algorithm. Recently, techniques based on dimensionality reduction have been explored for capturing the concepts present in a collection of documents. In this research we investigate concept indexing as interpretation concept in Indonesian documents for clustering documents using bisecting K-means. This research showed concept-based documents clustering was achievable and that it increased the F-measure up to 38% as compared to word-based clustering.
Keyword: 

Judul: Respons Imun dan Aktivitas Enzim Pencernaan Udang Vaname (Litopenaeus vannamei) di Tambak selama Wabah White Feces Disease.
Abstrak: White feces disease (WFD) merupakan salah satu penyakit yang menyerang udang vaname (Litopenaeus vannamei). Penyakit WFD menyebabkan penurunan tingkat kelangsungan hidup udang vaname hingga 20-30% dan terhambatnya pertumbuhan udang. Penelitian ini bertujuan menganalisa respons imun, aktivitas enzim pencernaan, dan gambaran histopatologi saluran pencernaan udang terinfeksi WFD dibandingkan pada udang normal di tambak intensif. Parameter yang diamati meliputi kelimpahan bakteri usus, total haemocyte count (THC), differential haemocyte count (DHC), aktivitas fagositik, respiratory burst (RB), aktivitas phenoloxidase (PO), aktivitas lisozim, dan aktivitas enzim pencernaan, serta histopatologi hepatopankreas dan usus. Hasil pengukuran kelimpahan bakteri usus menunjukkan jumlah kelimpahan yang tidak jauh berbeda antara udang vaname normal dan udang vaname terinfeksi WFD. Hasil uji THC, RB, aktivitas PO, aktivitas lisozim, dan aktivitas enzim pencernaan menunjukkan nilai yang berbeda nyata (P<0,05) antara udang normal dan udang terinfeksi WFD. Akan tetapi, hasil uji DHC dan aktivitas fagositik menunjukkan hasil tidak berbeda nyata (P>0,05) antara udang normal dan udang terinfeksi WFD. Hasil histopatologi hepatopankreas dan usus menunjukkan kerusakan yang terjadi pada udang vaname yang terinfeksi WFD. Selain itu, kinerja produksi udang normal seperti tingkat kelangsungan hidup, rasio konversi pakan, bobot rata-rata akhir, dan biomassa akhir menunjukkan hasil yang lebih baik dibandingkan udang terinfeksi WFD. Penurunan respons imun dan kerusakan organ hepatopankreas dan usus pada udang terinfeksi WFD menyebabkan kinerja produksi yang lebih rendah dibandingkan dengan udang normal.
Keyword: Enzim pencernaan, Litopenaeus vannamei, respons imun, saluran pencernaan, white feces disease