Judul: Status Resistensi Crocidolomia binotalis Zell. (Lepidoptera: Pyralidae) terhadap Insektisida Profenofos (Curacron 500 EC) dari Tiga Daerah di Jawa Barat.
Abstrak: Penelitian ini bertujuan untuk mengetahui tingkat resistensi larva instar II dan instar III C. binotalis dari tiga daerah di Jawa Barat (Garut, Pangalengan, Lembang) terhadap insektisida profenofos (Curacron 500 EC). Penelitian ini dilaksanakan pada bulan Februari sampai Juli 1999. Populasi C. binotalis lapangan berasal dari pertanaman kubis petani di desa Sukawargi, kecamatan Cisurupan, kabupaten Garut; desa Cibogo dan Cikidang, kecamatan Lembang, kabupaten Bandung dan desa Pulosari dan Warnasari, kecamatan pangalengan, kabupaten Bandung. Menurut Winterringham (1969) dalam Soemawinata et al. (1994), resistensi terjadi pada suatu populasi serangga apabila NR (nisbah resistensi) ≥ 4. Penentuan tingkat konsentrasi untuk masing-masing populasi dilakukan dengan analisa probit program SAS
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Judul: Deteksi resistensi terhadap Crocidolomia binatalis Zell.(Lepidoptera:Pyralidae) dan pengaruh konsentrasi subletal profenofos terhadap berat pupa, keberhasilan pupa menjadi imago, reproduksi dan lama hidup imago
Abstrak: Penelitian ini bertujuan untuk mengamati tingkat resistensi C. binotalis dan pengaruh konsentrasi subletal insektisida golongan profenofos terhadap berat pupa, keperidian imago betina C. binotalis, persentase penetasan telur dan lama hidup imago di beberapa daerah sentra produksi kubis. Penelitian ini dilakukan terhadap lima populasi C. binotalis dari empat daerah sentra produksi kubis yaitu Sukabumi, Bandung, Simpang Empat (Sumatera utara) dan Pacet, selama bulan Maret hingga November 1996. Dalam penelitian ini suatu serangga dikatakan resisten apabila nisbah resistensinya lebih atau sama dengan empat (Winterringham, 1969 dalam Soemawinata et al., 1994). Penentuan tingkat konsentrasi untuk masing-masing perlakuan dilakukan dengan analisa probit. Pengaruh konsentrasi subletal dianalisa dengan program SAS yang diikuti dengan uji Duncan pada taraf 0.01%. Hasil penelitian menunjukkan bahwa C. binotalis populasi Bandung mempunyai nisbah resistensi 15.4 dan 13.3, berturut-turut diikuti dengan populasi Pacet, Simpang Empat dan Sukabumi dengan nisbah resistensi 7.4, 7.0 dan 4.1. ...
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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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