Judul: Evaluasi Kecukupan Nutrien Sapi Perah di Peternakan Rakyat Kebon Pedes.
Abstrak: Penelitian ini bertujuan untuk mengevaluasi kecukupan nutrien sapi perah laktasi di peternakan rakyat Kebon Pedes dan mengamati pengaruhnya terhadap produksi dan kualitas susu. Penelitian dilakukan mulai bulan Januari sampai Maret 2016 melalui survey lapangan dan analisis laboratorium. Peubah yang diamati adalah intake pakan, intake nutrien, fermentabilitas pakan, kecernaan pakan, ME (metabolizable energy), NEL (net energy for lactation), manure score, produksi susu, komposisi susu, bobot badan, dan skor BCS (body condition score). Data dianalisis menggunakan analisis deskriptif serta uji korelasi dan regresi untuk menduga performa ternak. Hasil penelitian menunjukkan bahwa kebutuhan nutrien sapi perah di peternakan rakyat Kebon Pedes masih belum tercukupi untuk intake bahan kering, protein kasar, TDN (total digestible nutrient), dan mineral Ca. Saran yang dapat diusulkan untuk memperbaiki kondisi ini adalah dengan meniru ransum peternak best practice. Model pendugaan performa ternak yang memuaskan belum dapat dibuat dari informasi intake dan penggunaan nutrien sapi perah di peternakan rakyat Kebon Pedes (R<50%).
Keyword: kecukupan nutrien, intake nutrien, performa ternak, sapi perah

Judul: Evaluasi Kecukupan Nutrien Sapi Perah terhadap Produksi dan Kualitas Susu serta Performa yang Dihasilkan pada Peternakan Rakyat
Abstrak: Penelitian ini bertujuan untuk mengevaluasi kecukupan nutrien sapi perah laktasi serta mengetahui perbedaan produksi dan kualitas susu sapi perah di tiga lokasi peternakan rakyat terhadap intake dan penggunaan nutrien pakan serta performa sapi perah berdasarkan data intake dan penggunaan nutrien. Penelitian dilakukan mulai bulan September 2016 hingga April 2017 melaui survey lapang dan analisis laboratorium. Peubah yang diamati adalah intake pakan, intake nutrien, fermentabilitas pakan, kecernaan pakan, ME (metabolizable energy), manure score, produksi susu, komposisi susu, bobot badan, dan BCS (body conditioning score). Data dianalisis menggunakan analisis deskriptif, uji T, serta uji korelasi dan regresi untuk menduga performa ternak. Hasil penelitian menunjukkan bahwa ≤ 50% dari populasi ternak yang dapat memenuhi kecukupan nutriennya. Pendugaan performa sapi melalui analisis korelasi dan regresi intake dan penggunaan nutrien belum mendapatkan hasil yang memuaskan.
Keyword: intake nutrien, kecukupan nutrien, performa ternak, sapi perah

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