Judul: Analisis Pola Jaringan Sosial menggunakan Sociogram pada Mahasiswa Departemen Statistika IPB Tahun Masuk 2010
Abstrak: College world is often associated with independent learning system. Students can choose their friends, who can be trusted to help resolve the problems, as their partner discussion. The social network can be seen from the interaction which students made when choosing their partner. Course managers and lecturers can take policy in improving student’s performance by examining the patterns of the student’s social network. The patterns and structure of the social network can be described by a graph called sociogram. The data was obtained from the questionnaires which was conducted on a group of students. The group was taken from the Department of Statistics students, 2010 academic year. Data was processed using NetDraw software. Based on the result obtained, sociogram discovered some interesting things. One of them is that the most partner discussion was the problem of lecture.
Keyword: sociogram, characteristic, social network analysis

Judul: Penerapan Metode Sociogram untuk Visualisasi Kolaborasi Peneliti pada Koleksi IPBana
Abstrak: Bogor Agricultural University (IPB) has been doing a lot of researches. The amount of research conducted by IPB each year was fluctuated, but generally increased. Most of these studies involved more than one researcher, IPB researchers and researchers from other institutions outside the university. Until now, information about collaboration between the researchers was presented only in written form on the website of LPPM IPB. The presentation in written form is not effective so that it is necessary to visualize the information of researchers’ linkage for the research collaboration in IPB. In this study, the visualization of researchers’ linkage information was made in web-based, using the data from IPBana collection and IPB staffing system. Visualization method utilized in this study is Sociogram. The linkages between researchers were modeled in a graph connecting 2 research entities (nodes) through a research (edge). Visualization can be seen up to 3 levels of lingkages. IPB researchers were modeled by a blue node, while the external researchers were modeled with a green node. Research was modeled with a red edge. Node size was made proportional to the amount of research, whereas the size of the edge is directly proportional to the amount of collaboration.
Keyword: 

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).
Keyword: