Judul: Manajemen Pemanenan Kelapa Sawit (Elaeisguineensis Jacq.) di Kebun Adolina PTPN IV, Serdang Bedagai, Sumatera Utara
Abstrak: Pelaksanaan magang di Kebun dilakukan sejak 21 Januari hingga 21 Mei 2019 . Magang secara umum bertujuan memahami dan menambah kemampuan diseluruh aspek yang berkaitan dengan budidaya kelapa sawit secara teknis dan manajerial. Tujuan khusus maganga dalah mempelajari kegiatan panen dari persiapan panen hingga pengangkutan ke pa brik pengolahan . ... dst
Keyword: kualitas, tenaga kerja, rotasi panen, keefektivan kerja

Judul: Manajemen Pemanenan Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Rambutan, PT Perkebunan Nusantara III, Sumatera Utara.
Abstrak: Kegiatan magang memberikan ilmu dan keterampilan dalam budidaya kelapa sawit baik secara teknis maupun manajerial. Kegiatan magang dilaksanakan mulai bulan Februari hingga Juni 2016 di Kebun Rambutan PT Perkebunan Nusantara III (Persero), Serdang Bedagai, Sumatera Utara. Kegiatan magang dilakukan dari taraf sebagai karyawan harian lepas (KHL), pendamping mandor, dan pendamping asisten. Aspek pemanenan mencakup rotasi panen, kerapatan panen, kapasitas panen, sistem panen, produksi dan produktivitas, denda dan premi panen, transportasi panen, dan kehilangan hasil panen. Data sekunder yang dikumpulkan berupa studi literatur dan mempelajari arsip kebun dalam bentuk laporan bulanan, laporan tahunan, serta dari dokumentasi kebun. Pengelolaan perkebunan kelapa sawit terutama aspek panen di Kebun Rambutan, PTPN III sudah cukup baik dan sesuai dengan instruksi kerja yang berlaku. Pelaksanaan kegiatan penghitungan angka kerapatan panen (AKP) sudah akurat. Produksi dan produktivitas tanaman tergolong rendah jika dibandingkan dengan areal tanaman yang luas, umur produktif tanaman, dan potensi produktivitas.
Keyword: Rotasi panen, angka kerapatan panen

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