Judul: Audit Energi pada Peternakan Ayam Broiler di Desa Petir Kecamatan Dramaga
Abstrak: Peternakan merupakan subsektor pertanian yang menghasilkan bahan pangan seperti daging, susu dan telur. Daging memiliki nilai produksi paling tinggi dibanding hasil ternak lainnya, dan produksi daging paling tinggi pada tahun 2016 adalah daging ayam ras pedaging (ayam broiler). Tujuan penelitian ini adalah melakukan audit energi pada dua peternakan ayam broiler di Kecamatan Dramaga. Sasaran penelitian ini adalah mengetahui bentuk dan jumlah energi yang digunakan pada kegiatan budidaya ayam broiler, energi spesifik dan faktor yang mempengaruhi penggunaan energi, serta itu penghematan yang dapat dilakukan guna mengurangi biaya produksi. Bentuk energi yang digunakan adalah energi manusia, energi listrik dan energi panas yang didapat dari bahan bakar kayu bakar. Kegiatan audit energi yang dilakukan memiliki dua tahapan, yaitu preliminary energy audit dan detailed energy audit. Audit energi dilakukan pada kandang dengan kapasitas 7000 ekor ayam (kandang A) dan 8500 ekor ayam (kandang B). Bentuk enegi yang digunakan Hasil audit energi menunjukan bahwa kandang A menggunakan energi sebanyak 4.3672187 MJ/ekor ayam dengan persentase penggunaan kayu bakar sebesar 99.18%, energi manusia 0.77% dan energi listrik sebesar 0.04%. Kandang B menggunakan energi sebanyak 4.682317 MJ/ekor ayam dengan persentase penggunaan kayu bakar sebesar 99.36%, energi manusia sebesar 0.61% dan energi listrik sebsar 0.03%. Pemeliharaan anak ayam merupakan tahapan yang paling banyak membutuhkan energi, sedangkan pemeliharaan ayam dewasa memerlukan input energi paling sedikit. Hal tersebut berlaku pada kandang A maupun kandang B.
Keyword: audit energi, ayam broiler, energi spesifik

Judul: Efisiensi penggunaan energi dan kebutuhan untuk hidup pokok pada ayam broiler dan ayam tipe petelur serta hubungannya dengan pembentukan lemak tubuh
Abstrak: Penelitian ini dilakukan dalam dua tahap yaitu penelitian Tahap I bertujuan untuk menentukan angka kebutuhan energi untuk hidup pokok pada ayam broiler dan ayam petelur tipe medium dalam dua periode umur serta untuk menentukan efisiensi penggunaan energi. Penelitian Tahap II adalah untuk menentukan kelebihan energi di atas kebutuhan energi untuh: hidup pokok yang dibentuk menjadi lemak tubuh sebagai salah satu syarat untuk menentukan kualitas karkas.
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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