Judul: Cacing ektoparasit pada kura-kura (Cuora amboinensis) air tawar di Daerah Banten
Abstrak: Parasit merupakan organisme yang hidup pada atau di dalam tubuh organisme lain (inang). keberadaan parasit dapat mengganggu kehidupan inang. Akibat yang paling fatal bila tetjadi infestasi secara besar-besaran dapat menyebabkan kemalian bagi inang tersebut. Pada penelitian ini dilakukan inventarisasi dan identifikasi cacing ektoparasit pada kura-kura air tawar yang diperoleh dari pedagang pengumpul di daerah Banten. Dari 189 ekor kura-kura yang terkumpul, 23 ekor (12.2 %) terinfestasi oleh cacing kelas Trematoda ordo Monogenea. Ditemukan 62 ekor cacing ektoparasit, 35 ekor dari karapas, 25 ekor dari plastron dan 2 ekor dari leher. Hasil identifikasi menunjukkan bahwa 62 ekor cacing tersebut tergolong dalam 4 superfamili yaitu Gyrodactiloidea, Tetraoncoidea, Acanthocotyloidea dan Dactylogyroidea. Identifikasi sampai famili hanya dapat dilakukan pada superfamili Tetraoncoidea dan Acanthocotyloidea. Lokasi penangkapan tidak menunjukkan adanya hubungan dengan jenis cacing yang menginfestasi. Prevalensi parasit pada kura-kura sebesar 100 % dan intensitas infestasi sebesar 4.21 parasit lindividu inang
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Judul: IPB (Bogor Agricultural University)
Abstrak: Parasit merupakan organisme yang menumpang hidup pada organisme lain. Simbiosis parasitisme terjadi pada kura-kura. Kura-kura adalah inang untuk beberapa jenis parasit, diantaranya adalah Apicomplexa, Acanthocephala, Nematoda, Platyhelminthes dan Arthropoda. Feses inang dapat digunakan untuk menganalisis keberadaan endoparasit. Penelitian ini bertujuan untuk menentukan identifikasi jenis parasit berdasarkan hasil analisis feses Cuora amboinensis, mengkaji nilai prevalensi dan intensitas endoparasit feses Cuora amboinensis dan pola spesifitas parasit terhadap inang. Penangkapan kura-kura telah dilakukan selama lima bulan (Maret-Juli 2007) dan Mei 2008 di lima perairan Sulawesi Selatan meliputi Makassar, Watampone, Luwu Timur, Bulukumba dan Luwu Utara. Jenis kura-kura yang di koleksi adalah Cuora amboinensis tergolong ke dalam famili Geomydidae. Parasit di koleksi dari feses dan dipreparasi di Bagian Biosistematik dan Ekologi Hewan Departmen Biologi, FMIPA-IPB. Preparasi spesimen menggunakan pewarnaan eosin. Hasil menunjukkan bahwa hanya ada empat ekor dari 40 ekor Cuora amboinensis yang terinfestasi oleh endoparasit. Endoparasit pada feses adalah Platyhelminthes. Cacing endoparasit ditemukan sebanyak tujuh ekor. Nilai prevalensi adalah 0.88% dan intensitas 1.75 parasit/inang. Pola spesifitas adalah spesifik dan multi parasit.
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Judul: Algorithm Construction of HLI Hash Function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice