Judul: Budidaya tebu (Saccharum officinarum L.) lahan kering di PG Madukismo PT Madubaru Yogyakarta dengan aspek khusus pelaksanaan pemupukan
Abstrak: Kegiatan magang dilaksanakan di wilayah kerja PG Madukismo PT Madubaru, Kabupaten Purworejo dan Kabupaten Gunungkidul sejak bulan Februari sampai bulan Juni 2015. Kegiatan magang bertujuan untuk mempelajari serta memperoleh pengalaman dan keterampilan bekerja secara nyata mengenai aspek teknis budidaya tebu. Aspek teknis yang dilakukan berupa aplikasi pemupukan pada tebu lahan kering di PG Madukismo, PT Madubaru, Yogyakarta. Petani tebu menggunakan pupuk ZA, NPK, dan pupuk organik bersubsidi yang didapat dengan mengajukan Rancangan Definitif Kebutuhan Kelompok (RDKK) Pupuk Bersubsidi. Dosis yang tercantum pada RDKK Pupuk Bersubsidi adalah ZA 6 ku ha dan NPK 4 ku ha. Petani wilayah Purworejo yang merupakan petani lama dan pada umumnya menambah sendiri dari dosis rekomendasi pada RDKK Pupuk Bersubsidi dengan dosis rata-rata ZA 7.5 ku ha¹ dan NPK 4.7 ku ha Petani wilayah Gunungkidul yang merupakan petani baru memakai dosis yang sesuai dengan RDKK Pupuk Bersubsidi. Kedua wilayah kurang efektif dalam cara pemupukan tanaman tebu. Produktivitas wilayah Purworejo lebih tinggi dibanding wilayah Gunungkidul karena pengaruh iklim, potensi lahan, dan ketepatan kegiatan budidaya.
Keyword: Gunungkidul, New farmer, Experience farmer, Purworejo, RDKK of subsidized fertilizer, Dry land, Upland sugarcane, Fertilization method, Iklim dan tanah, Budidaya tebu

Judul: Budidaya tebu (Saccharum officinarum L.) lahan kering di PG Madukismo PT Madubaru Yogyakarta dengan aspek khusus pemupukan beberapa kategori tanaman tebu lahan kering
Abstrak: The internship was conducted at PG Madukismo PG Madubaru Yogyakarta beginning 14 February 2012 to 15 Mei 2012. The special purpose is study fertilization of some category of upland sugarcane at PG Madukismo PT Madubaru Yogyakarta. Fertilization in PG Madukismo is important because one in order to achieve high productivity is a good fertilizer. Most of the fields in the PG Madukismo was upland. There are two types of cultivated sugar cane that is PC (Plant Cane) and RC (Ratoon Cane) Fertilizer used in PG Madukismo is the dose recommended by the P3GI and considered by PG Madukismo and farmers. Parties responsible for the extraction of manure from the barn to the application to sugarcane was foreman and field assistant. Dosage fertilizer for PC (Plant Cane) are 11 ku/ha Madros, 5 ku/ha ZA and 5 ku/ha Phonska while for RC (Ratoon Cane) are 5 ku/ha ZA and 5 ku/ha Phonska. The data obtained were analyzed using t-test. From the results obtained for plants PC or RC I obtained the best productivity of sugarcane grown on land that has a typology mild soil type, irrigation well (pump) and the current drainage there are Kledokan field in Magelang which have productivity 598 ku /ha and Sikendal field in Temanggung which have productivity 693 ku/ha.
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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