Judul: Pengaruh Penilaian Kualitas Produk terhadap Tingkat Loyalitas Pelanggan Kopi Bubuk Instan 2 in 1 cap Banyuatis di Kota Singaraja
Abstrak: Kopi cap Banyuatis merupakan perusahaan pengolahan biji kopi asal daerah di Kota Singaraja dengan Kopi Bubuk 2 in 1 cap Banyuatis sebagai salah satu produk unggulan dan hingga kini masih sanggup bersaing dipasaran meskipun perusahaan lain yang memiliki produk serupa mulai bermunculan. Tujuan dari penelitian ini adalah 1) mengidentifikasi penilaian pelanggan terhadap kualitas Kopi Bubuk instan 2 in 1 cap Banyuatis, 2) mengukur tingkat loyalitas pelanggan terhadap loyalitas pelanggan Kopi Bubuk 2 in 1 cap Banyuatis, dan 3) menganalisis pengaruh penilaian kualitas produk terhadap loyalitas pelanggan Kopi Bubuk 2 in 1 cap Banyuatis. Metode analisis yang digunakan pada penelitian kali ini adalah analisis deskriptif dan SEM dengan Pendekatan SmartPLS melalui hasil survei dari 210 responden. Data primer didapatkan melalui penyebaran kuesioner secara langsung dengan Teknik systematic random sampling (rumah dengan nomor ganjil dari 7 perumahan di Kota Singaraja). Hasil penelitian ini menunjukkan bahwa terdapat beberapa variabel pada kualitas produk yang berpengaruh signifikan terhadap loyalitas pelanggan.
Keyword: Kualitas Produk, Loyalitas Pelanggan, SmartPLS

Judul: Pengaruh Bauran Pemasaran terhadap Kepuasan dan Loyalitas Konsumen Kopi Cap Keluarga di Kota Kotamobagu Sulawesi Utara.
Abstrak: Salah satu produk kopi yang terkenal di Kota Kotamobagu adalah Kopi Cap Keluarga yang diproduksi oleh UD. Sakura. Penelitian ini dilakukan untuk untuk menganalisis kinerja kepuasan konsumen dan loyalitas konsumen serta menganalisis pengaruh bauran pemasaran terhadap tingkat kepuasan dan loyalitas konsumen Kopi Cap Keluarga. Analisis CSI dan CLI digunakan untuk menganalisis kinerja kepuasan dan loyalitas konsumen. Kemudian, analisis SEM-PLS digunakan untuk menganalisis hubungan bauran pemasaran terhadap tingkat kepuasan dan loyalitas konsumen. Berdasarkan hasil penelitian, tiingkat kepuasan konsumen Kopi Cap Keluarga dikategorikan “sangat puas”, dengan nilai sebesar 84.88 persen. Sedangkan, tingkat loyalitas konsumen dikategorikan “loyal”, dengan nilai sebesar 78.88 persen. Hasil penelitian ini juga menunjukan bahwa variabel bauran pemasaran yang menunjukan hubungan positif dan signifikan terhadap kepuasan dan loyalitas adalah bauran harga. Sedangkan, variabel bauran pemasaran seperti produk, tempat, dan promosi tidak memiliki hubungan yang signifikan terhadap kepuasan dan loyalitas. Terakhir, kepuasan konsumen Kopi Cap Keluarga memberikan hubungan yang positif dan signifikan terhadap loyalitas konsumen.
Keyword: Bauran Pemasaran, Kepuasan Konsumen, Loyalitas Konsumen

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