Judul: Penundaan Penetasan Telur Ulat Sutra Samia cynthia ricini
Abstrak: Samia cynthia ricini adalah salah satu jenis ulat sutra non murbei yang sudah didomestikasi dan dikomersialisasikan. Ulat sutra S. ricini merupakan serangga multivoltin yang dapat menghasilkan sampai dengan lima generasi per tahun. Secara alamiah telur akan mulai menetas pada hari kedelapan sampai hari kesepuluh setelah peneluran. Penelitian ini bertujuan untuk mempelajari pengaruh penggunaan metode penetasan buatan terhadap penundaan penetasantelur ulat sutra S. ricini. Perlakuan penetasan buatan yang digunakan dalam penelitian ini adalah perlakuan asam langsung setelah oviposisi dan perlakuan asam setelah pendinginan singkat. Hasil perlakuan diperoleh bahwa perlakuan penetasan buatan berpengaruh pada perubahan sifat permeabilitas korion dan menyebabkan kerusakan embrio ulat sutra S. ricini, sehingga kedua perlakuan yang diterapkan gagal digunakan untuk menunda penetasan. Hal ini dimungkinkan karena kondisi dan lama penyimpanan, serta perlakuan penetasan buatan yang belum optimal dalam menunda penetasan telur ulat sutra S. ricini.
Keyword: kerusakan embrio, penetasan buatan, penundaan penetasan, perlakuan asam, Samia cynthia ricini

Judul: Perkembangan Ulat Sutra Samia cynthia ricini (Lepidoptera: Saturniidae) pada Suhu dan Lama  Penyimpanan Pupa Berbeda
Abstrak: Samia cynthia ricini merupakan spesies ulat sutra liar yang bersifat multivoltine yaitu mampu menghasilkan 5-6 generasi setiap tahunnya. Dalam budidaya ulat sutra yang dilakukan di Indonesia tidak ada masa diapause sehingga siklus berjalan terus sepanjang tahun. Pengaturan waktu budidaya dapat dilakukan dengan memberikan perlakuan suhu dan lama penyimpanan pada pupa ulat sutra. Penelitian ini bertujuan menganalisis pengaruh suhu dan lama penyimpanan pupa terhadap perkembangan S. ricini. Pupa disimpan pada tiga suhu penyimpanan berbeda yaitu suhu ruang, suhu refrigerator, dan suhu freezer. Durasi penyimpanan pupa adalah 2, 4, dan 8 hari sehingga total terdapat sembilan perlakuan. Beberapa parameter yang diamati adalah karakteristik kokon, durasi perkembangan pupa, persentase keluarnya imago, karakteristik imago, dan produksi telur. Hasil penelitian menunjukkan terjadi penurunan bobot dan ukuran kokon setelah masa penyimpanan pada setiap perlakuan. Durasi perkembangan pupa semakin lama dan persentase keluarnya imago semakin rendah pada pupa yang disimpan dalam refrigerator. Pupa yang disimpan dalam freezer seluruhnya mati. Kondisi sayap imago akan lebih banyak yang mengkerut ketika pupa disimpan di refrigerator. Produksi telur yang dihasilkan semakin rendah pada perlakuan refrigerator dengan durasi penyimpanan yang lama. Penurunan suhu simpan dan lamanya waktu penyimpanan dalam refrigerator meningkatkan penghambatan perkembangan S. ricini., Samia Cynthia ricini is a wild silkworm species that is multivoltine and can produce 5-6 generations each year. In the cultivation of silkworms carried out in Indonesia, there is no period of diapause so the cycle will continue throughout the year. It is necessary to adjust the timing of silkworm cultivation according to the availability of feed. This study aimed to analyze the effect of temperature and pupae storage time on the development of S. ricini. Pupae were stored at three different storage temperatures, i.e. room temperature, refrigerator temperature, and freezer temperature. The pupae storage duration were 2, 4, and 8 days so there were nine treatments in total. Several parameters observed were characteristics of the cocoon, duration of pupal development, percentage of imago emerged, imago characteristics, and egg production. The results showed a decrease in the weight and size of the cocoon after the storage period in each treatment. The duration of pupae development was longer and the percentage of imago emerged was lower in the pupae stored in the refrigerator and freezer. The pupae stored in the freezer are completely dead. The condition of the imago wings will shrink more when the pupae was stored in the refrigerator. The egg production was lower in the refrigerator treatment with long storage duration. The decrease in storage temperature and the length of storage duration on refrigerator increased the inhibition of the development of S. ricini.
Keyword: Cultivation, diapause, freezer, multivoltine, refrigerator

Judul: Pengenalan wajah dengan partisi citra menggunakan VFI5 berbasis histogram
Abstrak: Research in face recognition is motivated not only by the fundamental challenges this recognition problem poses but also by numerous practical applications where human identification is needed. Face recognition, as one of the primary biometric technologies, became more important owing to rapid advances in technologies such as digital cameras, the Internet and mobile devices, and increased demands on security. Face recognition has several advantages over other biometric technologies: It is natural, non intrusive, and easy to use. There are two predominant approaches to the face recognition problem: geometric (feature based) and photometric (view based). A classification algorithm, called VFI5 (Voting Feature Intervals), is developed and applied to problem of face recognition with partition based on histogram. VFI5 represents a concept in the form of feature intervals on each feature dimension separately. Classification in the VFI5 algorithm is based on a real-valued voting. Each feature equally participates in the voting process and the class that receives the maximum amount of votes is declared to be the predicted class. The performance of the VFI5 classifier is evaluated empirically in terms of classification accuracy. Conclusion of this research indicates that VFI5 can be used for face recognition with high accuracy the level.
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