Judul: Perbandingan Kualitas Air Susu Dari Perusahaan Peternakan Sapi Perah Dan Peternakan Sapi Perah Rakyat Di Kebun Pedes Kotamadya Bogor
Abstrak: Suatu penelitian untuk mengetahui kualitas air susu yang dihasilkan oleh peternakan rakyat dan perusahaan telah dilakukan terhadap air susu dari peternakan sapi perah di Kebun Pedes Kotamadya Bogor dari tgl 16 Februari samapai 31 Maret 1981. Jumlah peternak yang jumlah air susunya diamati terdiri dari 7 perusahaan dan 14 peternakan rakayat yang diambil secara acak sederhana.
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Judul: Kualitas susu produksi peternakan rakyat dan perusahaan peternakan di daerah koperasi produksi susu dan peternakan sapi perah Bogor
Abstrak: Salah satu faktor penting untuk mempertinggi konsumsi susu adalah keyakinan konsumen terhadap kualitas susu yang akan dikonsumsi. Penelitian ini bertujuan untuk mengetahui apakah terjadi pemalsuan pada susu peternakan rakyat dan perusahaan peternakan dengan mengamati kualitas susu dari kandang, truk Susu sampai di Koperasi Produksi Susu dan Peternakan Sapi Perah (KPS) Bogor. Penelitian ini dilakukan di KPS Bogor baik peternakan rakyat maupun perusahaan peternakan dan Laboratorium Ilmu Produksi Ternak Perah, Jurusan Ilmu Produksi Ternak, Fakultas Peternakan, Institut Pertanian Bogor sejak bulan Desember 1990 sampai dengan bulan. Januari 1991. Pengamatan dilakukan terhadap kualitas SUSU yang meliputi uji kebersihan, uji alkohol, uji kadar lemak, uji kadar protein, uji kadar Bahan Kering, uji kadar Bahan Kering Tanpa Lemak susu dan uji jumlah bakteri dalam susu. Pengamatan dilakukan di tiga tempat pengambilan contoh Susu yaitu di kandang, truk pengangkut susu dan di KPS Bogor. Untuk membandingkan nilai rataan tiap parameter yang diamati antara kedua bentuk usaha peternakan tersebut. digunakan uji t-Student dan uji t' Behrens Fisher. Kebersihan susu yang dihasilkan oleh peternakan rakyat dan perusahaan peternakan yang menjadi anggota KPS Bogor dinilai masih rendah. Hal ini disebabkan persentase. SUSU kotor yang didapat masih tinggi, yaitu masing-masing adalah 73.3% dan 70%. Rataan berat jenis susu peternakan rakyat yang diambil di kandang, truk pengangkut susu dan KPS Bogor masing- masing adalah 1.0278, 1.0276 dan 1.0278, sedangkan rataan berat, jenis susu perusahaan peternakan yang diambil di tiga tempat tersebut masing-masing adalah 1.0277, 1.0276 dan 1.0277. Rataan kadar lemak susu peternakan rakyat yang diambil di kandang, truk pengangkut susu dan KPS Bogor masing- masing adalah 3.22%, 3.20% dan 3.14%, sedangkan rataan kadar lemak perusahaan peternakan yang diambil di tiga tempat tersebut masing-masing adalah 3.58%, 3.27% dan 3.31%. Rataan kadar protein susu peternakan rakyat yang diambil di kandang, truk pengangkut susu dan KPS Bogor masing-masing adalah 2.76%, 2.71% dan 2.75%, sedangkan rataan kadar protein susu perusahaan peternakan yang diambil di tiga tempat tersebut masing-masing adalah 2.85%, 2.72% dan 2.68%. Rataan kadar Bahan Kering susu peternakan rakyat yang diambil di kandang, truk pengangkut susu dan KPS Bogor masing-masing adalah 11.28%, 11.22% dan 11.24%, sedangkan rataan kadar Bahan Kering susu perusahaan peternakan di tiga tersebut masing-masing adalah 11.72%, 11.31% dan 11.37%....dst
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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