Judul: Pengamatan terhadap aktivitas pengguna jejaring media sosial Facebook dengan Statistika deskriptif
Abstrak: Social network Facebook is the social network that exist long enough. Currently, Facebook is the social network with the most users in the world. More than 80% of internet users in the world have a Facebook account. In Indonesia, Facebook is the social network with the most users too. Percentage of internet users in Indonesia that have a Facebook account is over 90%, and more than half are active users. Result of observation over some Facebook account show that 45% users became passive in the last two years (2013-2014). Down rate in 2014 is higher than 2013. The emergences of various new social network with different services is suspected causes many Facebook users became passive and start using other social network.
Keyword: Bogor Agricultural University (IPB), descriptive statistics, Facebook, social media

Judul: Deskripsi Penggunaan Internet Di Kalangan  Mahasiswa Institut Pertanian Bogor
Abstrak: Today, internet has become important needs to all people, especially student. The aim of this research is to identify factors affecting student become an active or lapsed users of internet using binary logistic regression. This research also investigate factors affecting internet usage intensity of active users (devided into high, moderate, and low users) using ordinal logistic regression. By knowing these factors, the internet provider could determine the type of consumer they are going to reach. The object of this research is undergraduate students of Bogor Agriculture University that came in between year 2001-2004. Stratified sampling methods were used in this research using faculty as strata. Number of sample that was collected is 250 samples. Data shows that 81.6% are active users among them, 6.9%, 49.8%, and 43.3 % are high, moderate, and low users, respectively. The research show that the main factors affecting student become an active users of internet are (1) the use of internet for educational reason; (2) the use internet for personal communication, games, and access public information purposes; and (3) campus and internet cafe as location when using internet. While the main factor affecting students become an lapsed users is the use of internet to look for holiday information. The main factors affecting internet usage intensity of active users are the use of internet using personal email, business email, world wide web, download software/film/music, and mailing list application.
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Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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