Judul: Analisis Hubungan Kondisi Iklim Dengan Ledakan Ulat Bulu: Studi Kasus di Kabupaten Probolinggo, Jawa Timur
Abstrak: An outbreak of caterpillars Arctornis submarginata Wlk.(Lep.: Lymantriidae) occured in nine subdistrict of Probolinggo during March-April 2011. The caterpillar caused heavy defoliation on mangoes, with a total of 14.813 trees affected. Pest populations are commonly strongly influenced by the dynamics of climatic factors. The research aimed to evaluate and analyze the relationship between climatic conditions and the outbreaks of caterpillars. We used a qualitative-descriptive method to analyze rainfall variation for 10 years in the area, regression analysis of climatic factors and pest severity, and climex software to analyze potential pest distribution. Our analysis showed a strong relationship between outbreak of caterpillars and a high rainfall in the study area. The monthly average of rainfall for January to April was higher than monthly rainfall for 10 years. Based on regression analysis, the strongest influence of the whole climatic factors was found on the larval stages of which the value of R2 is 28.9%. Analysis using software climex showed the value of EI (Ecoclimatic Index) is 92, 87 and 46 in compare location, indicating that the study area was more suitable for the caterpillars. Climate is one of the factors affecting caterpillar outbreaks, in addition to biotic factors such as natural enemies.
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Judul: Studi Ulat Bulu pada Pertanaman Mangga dengan Perhatian Utama pada Kasus Ledakan di Probolinggo
Abstrak: Selama bulan Maret-April 2011 terjadi ledakan ulat bulu Arctornis submarginata Wlk. (Lep.: Lymantriidae) pada pertanaman mangga di Probolinggo. Pada saat yang bersamaan ledakan ulat bulu dilaporkan pula terjadi di tempat-tempat lainnya. Penelitian bertujuan mempelajari serangan, musuh alami, dan siklus ulat A. submarginata, serta mengidentifikasi jenis-jenis ulat bulu lainnya yang menyerang pohon mangga. Serangan dan musuh alami ulat bulu dipelajari melalui kegiatan survei dan pengumpulan ulat atau kepompong pada pertanaman mangga di Probolinggo, Indramayu, dan Kendal; sedangkan penelitian siklus hidup A. submarginata dilakukan di laboratorium.Hasil survei pada pertengahan Mei 2011 mengungkapan serangan ulatA. submarginata sudah sangat menurun. Menurunnya serangan ulat bulu ini disebabkan oleh meningkatnya perananmusuh alami, yang menyebabkan kematian pada pupa hingga 98%. Musuh alami yang paling umum ditemukan adalah parasitoid Brachymeria sp. dan Xantophimpla sp, serta cendawan entomopatogen yang menginfeksi pupa. Di laboratorium, siklus hidup ulat A. submarginata berlangsung sekitar 47 hari dengan keperidian 200 butir telur.Ulat bulu lainnya dari famili Lymantriidae yang menyerang pohon mangga adalah Lymantria marginata, Orgyia postica, dan Dasychira inclusa.
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Judul: Simulasi Protokol Autentikasi Pelanggan pada Voice Privacy
Abstrak: Existing design of the telephone public network is susceptible to eavesdropping on its voice stream. Consequently, any wire taper can listen to supposedly private conversation. In order to prevent such eavesdropping, we propose a protocols and its implementation for end-to-end voice privacy authenticate as a service available for interested subscribers. Our protocols consist of customer enrollment system, customer authentication system and simulation voice privacy. Protocols that we made are adaptation from Sharif and Wijekesera journal with the title Providing Voice Privacy as a Service over the Public Telephone Network. The result of the process shows how the customer enrolls and how the system process the password, how the system authenticate customer simulate voice privacy.
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