Judul: Manajemen pemetikan tanaman teh (Camellia sinensis (L.) O. Kuntze) di PT Rumpun Sari Kemuning, Karanganyar, Jawa Tengah
Abstrak: This program was apprentice activity have intent to increase the knowledge and experience about pick aspect management and directly involve in the field and can solve the problem happens in the field. The internship program was conducted in PT Rumpun Sari Kemuning Karanganyar, Solo, Central Java almost for four months since February until July 2014. The implementation of apprentice is direct work activity and attend technical activities in the field. Observation is covering the that pluck section surface, diameter pluck section surface, the capacity of plucker thicknes of leaf, conservancy of tip leaf, productivity by age after cutting, pick analysis, bud analysis, services of picker. The result of observations were obtained there are some aspects in picking PT Rumpun Sari Kemuning during internship activities indicate that the execution time and shift plucking stringed jendangan not meet the standards set, still need improvement to meet the standards company, but the production can meet the needs of the target because at the top of the analysis result of the passage remains in compliance with the passage of medium quality standard.
Keyword: Bogor Agricultural University (IPB), tea., analysis tip, plucking pick

Judul: Pengelolaan Pemetikan Tanaman Teh (Camellia sinensis (L.) O. Kuntze) di Unit Perkebunan Rumpun Sari Kemuning, PT Sumber Abadi Tirta Sentosa, Karanganyar, Jawa Tengah
Abstrak: Kegiatan magang dilaksanakan untuk memperluas pengetahuan, pengalaman teknis dan manajerial tanaman teh serta mempelajari aspek pemetikan. Kegiatan magang dilaksanakan di Perkebunan Rumpun Sari Kemuning, Karanganyar, Jawa Tengah pada bulan Februari sampai Juni 2014. Metode yang dilaksanakan selama kegiatan magang terbagi atas dua yaitu metode langsung dan tidak langsung. Metode langsung dilakukan secara aktif mengikuti dan mengamati kegiatan teknis di lapangan dan wawancara. Metode tidak langsung dilakukan dengan mengumpulkan laporan manajemen, arsip kebun dan jurnal penelitian teh. Hasil magang menunjukkan bahwa tinggi bidang petik, diameter bidang petik, tebal daun pemeliharaan, kapasitas pemetik, gilir dan hanca petik, dan sarana transportasi telah sesuai standar PPTK Gambung. Analisis petik dan analisis pucuk masih perlu peningkatan agar kuantitas dan kualitas pucuk yang optimal. Pemangkasan mesin lebih efektif daripada pemangkasan manual dinilai dari bobot brangkasan dan manajemen waktu. Produksi dan HOK masih memerlukan jumlah tenaga kerja dalam memenuhi target produksi.
Keyword: bobot brangkasan, pemetikan, Perkebunan Rumpun Sari Kemuning, teh

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