Judul: Biologi psyllaephagus yosseni noyes (Hymenoptera = Encyrtidae) pada kutu loncat lamtoro Heteropsylla cuban Crawford (Homoptera : psyllidae)
Abstrak: Penelitian dilakukan di Bogor, di Laboratorium Pengendalian Hayati, Jurusan Hama dan Penyakit T'\Jrribuhar:, Fakultas' Pertanian-lPB pada tahun 1993. Penelitian bertujuan untuk mengetahui ciri-ciri biologi P. yaseeni yang meliputi ciri-ciri morfologi, perkembangan, reproduksi dan perilaku. P.yaseeni adalah endoparsitoid soliter -nimfa H. cubana. lnang yang terparasit mati dan berubah menjadi mumi pada akhir instar V ketika parasitoid mencapai tingkat perkembangan prapupa. Telur P. yaseeni berbentuk lonjong dan bertangkai (tipe stalked). Telur berukuran panjang 0.112 mm, lebar 0.062 mm dan panjang tangkai 0.095 mm. Telur tidak mengalami perubahan ukuran selama perkembangannya. Larva bertipe hymenopteriform dan diduga memiliki empat instar. Lebar kapsul kepala larva instar I, II, Ill dan IV berturut-turut adalah 0.065, 0.088, 0.145 dan 0.212 mm. Pada ujung posterior abdomen larva instar I dan II masih menempel bekas kulit telur. Prapupa berbentuk sama dengan larva instar terakhir dengan lebar kapsul kepala 0.213 mm. Pupa bertipe exarate dan terbentuk dalam mumi tanpa kokon. Pupa berukuran lebar kapsul kepala 0.378 mm dan panjang tubuh 1.080 mm. Telur P. yaseenidiletakkan dalam rongga toraks inangnya dengan tangkai telur menempel pada salah satu organ dalam toraks inang. Larva berkembang dalam rongga abdomen inang. Posisi kepala larva instar I, II dan Ill mengarah ke posterior abdomen inang, sedangkan instar IV mengarah ke anterior. Posisi kepala prapupa dan pupa mengarah ke posterior tubuh inang. ...
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Judul: Biologi, Perilaku Peletakan Telur dan Superparasitisme Parasitoid Diadegma eucerophage Horstmann (Hymenoptera : Ichneumonidae) Pada Larva Plutella xylostella Linnaeus (Lepidoptera : Yponomeutidae)
Abstrak: Penelitian dilaksanakan di laborat orium Eiiologi dan Ekologi Hama, Jurusan Hama dan Penyakit Tumbuhan, Institut Pertanian Bogor, dengan suhu ruangan rata-rata 26.9 0.8 C dan kelembaban nisbi 73.9 kurang lebih 5.6 persen. Penelitian bertujuan mempelajari be berapa aspek biologi , perilaku peletakan telur dan kemungkinan terjadinya superparasitisme parasitoid D. euceronhana pada larva P xylostella yang dipelihara pada daun kubis. Parasitoid D. eucerophaaa merupakan endoparasitoid larva soliter. Telur termasuk tipe hymenopteri form. Telur mengalami pertambahan ukuran, memanjang 1.50 kali dan melebar 1.67 kali, selama masa inkubasinya.
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Judul: Pembangunan Protokol Secret Sharing pada Metode Watermarking untuk Audio Digital
Abstrak: Digital watermarking is a technique to insert information, usually called a watermark, into digital data. The inserted information in general shows the ownership of digital data in order to copyright protection. Existing methods of digital watermarking can only deal with the copyright protection from only one owner. Joint ownership of a digital audio is proposed by adopting a secret sharing scheme in audio watermarking. This study discusses the implementation of Shamir's secret sharing scheme in the joint ownership for digital audio watermarking, including protocols for the insertion (embedding) watermark and protocols for detection ownership process (detection) watermark that meets one of the goals of cryptography is confidentiality. Furthermore, the owner of a digital audio referred to as the participants and the outcome of the process of secret sharing scheme is called shares. Performance of the method of Shamir's secret sharing scheme in the joint ownership watermarking for digital audio was tested by analyzing the properties of Shamir's secret sharing scheme and influence of the level of Lifting Wevelet Transform (LWT), which serves to form a region of the audio file to be inserted watermark, to the process of watermark insertion and watermark detection. This is because performing watermark detection requires the information of the level LWT that used to watermark insertion and LWT length where both of this informations may be known if we know the secret which is formed of shares owned by participants. The results show that joint ownership watermarking protocol that implements Shamir's secret sharing scheme provides confidentiality service where the process of insertion and detection requires a secret that formed by shares that are distributed to the participants confidentially. Thus Shamir's secret sharing scheme in the joint ownership for digital audio watermarking is one good solution to the problem of joint ownership of a digital audio because of the insertion and detection process involving all participants who are the owners of digital audio.
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