Judul: Analisis Sikap dan Kepuasan Konsumen terhadap Kopi Nescafe Ready to Drink di Kota Bogor.
Abstrak: Kopi ready to drink merupakan peluang bisnis. Adanya persaingan antara Nescafe (diluncurkan tahun 2000 an) dengan Good Day dan Kopiko 78C (diluncurkan tahun 2013) dimana top brand index dan brand share Nescafe memiliki tren menurun sedangkan Good Day dan Kopiko 78 meningkat. Tujuan penelitian ini adalah menganalisis proses keputusan pembelian, sikap, dan kepuasan konsumen terhadap kopi Nescafe ready to drink sehingga dapat dijadikan pertimbangan dalam pengambilan keputusan bagi Nestle Indonesia. Responden sebanyak 130 orang dengan metode convenience sampling. Analisis deskriptif digunakan pada karakteristik konsumen dan proses keputusan pembelian. Analisis sikap konsumen menggunakan multriatribut Fishbein dan kepuasan konsumen menggunakan Customer Satisfaction Index (CSI) dan Importance Performance Analysis (IPA). Hasilnya, skor sikap Nescafe sebesar 200.32, Kopiko 78C sebesar 192.31, dan Good Day sebesar 204.79. Hal ini mengindikasikan bahwa sikap konsumen terhadap Nescafe kurang diminati dibandingkan Good Day. Kepuasan konsumen kopi Nescafe ready to drink sebesar 75.6 persen. Prioritas utama yang perlu diperbaiki adalah harga yang terjangkau dan harga yang sesuai dengan mutu minuman.
Keyword: kepuasan konsumen, kopi ready to drink, Nescafe, sikap konsumen

Judul: Analisis Kepuasan Konsumen Terhadap Kedai Kopi Why Not Coffee Di Kota Bogor.
Abstrak: Why Not Coffee dalah salah satu pelopor kedai kopi yang menawarkan menu kopi dengan berbagai pilihan. Seiring berjalannya waktu, mulai bermunculan kedai kopi yang menyediakan menu dengan bahan baku kopi. Semakin ketatnya persaingan dibidang usaha yang sejenis berdampak pada jumlah pengunjung yang datang ke Why Not Coffee. Penelitian ini bertujuan untuk menganalisis proses pengambilan keputusan dan kepuasan konsumen yang hasilnya berimplikasi pada perbaikan atribut yang kinerjanya dinilai belum memenuhi keinginan konsumen. Metode yang digunakan analisis deskriptif, Costumer Satisfaction Index (CSI), Importance Performance Analysis (IPA). Berdasarkan hasil analisis CSI, tingkat kepuasan konsumen terhadap atribut Why Not Coffee adalah 76,2%.
Keyword: Why Not Coffee, perilaku konsumen, kepuasan

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