Judul: Analisis Kepuasan Konsumen Cafe Sop Buah dan Jus Freshasan di Kota Semarang
Abstrak: Tujuan dari penelitian ini adalah untuk menganalisa proses keputusan pembelian konsumen dan kepuasan konsumen, yang memberikan implikasi terhadap bauran pemasaran dari Café Sop Buah dan Jus Freshasan. Metode yang digunakan dalam penelitian adalah metode analisis deskriptif, analisis gap, dan Customer Satisfaction Index (CSI). Berdasarkan penelitian, mayoritas konsumen Café Sop Buah dan Jus Freshasan adalah berjenis kelamin perempuan, dengan usia 19-24 tahun yang berprofesi sebagai mahasiswa, berpendidikan terakhir SMA, berstatus belum menikah, dengan pendapatan/uang saku per bulan sebesar Rp1 000 000–Rp1 500 000. Pada tahap keputusan pembelian (pembeli tidak terencana, sumber informasi adalah teman, hari berkunjung pada kadang hari kuliah/kerja, dan waktu berkunjung pada jam pulang kuliah/kerja) dan keputusan pasca pembelian (konsumen merasa puas, sehingga hal tersebut mempengaruhi konsumen untuk berkunjung kembali). Nilai dari Customer Satisfaction Index (CSI) adalah 73.5 persen.
Keyword: karakteristik konsumen, kepuasan konsumen

Judul: Analisis Kepuasan Konsumen Coffee Shop Taman Kopi Serang di Kota Serang serta Implikasinya terhadap Bauran Pemasaran.
Abstrak: Tren bisnis coffee shop yang tengah berkembang dirasakan pula di Kota Serang. Munculnya tiga belas coffee shop pada tahun 2016 merupakan peningkatan terbesar perkembangan coffee shop di Kota Serang. Salah satu coffee shop yang mengikuti perkembangan ini adalah Coffee Shop Taman Kopi. Pihak pengelola Coffee Shop Taman Kopi perlu menganalisis perilaku konsumen dan mengetahui keinginan serta kebutuhan konsumen. Oleh sebab itu, penelitian ini bertujuan menganalisis karakteristik konsumen, keputusan pembelian konsumen, tingkat kepuasan konsumen serta implikasinya terhadap bauran pemasaran untuk mempermudah pengelola dalam menentukan strategi bauran pemasaran yang tepat. Metode yang digunakan adalah analisis deskriptif, Customer Satisfication Index dan Importance Performance Analysis dengan melibatkan 86 orang responden. Pengambilan data dilakukan pada bulan Juli 2017. CSI sebesar 73.13 persen menunjukkan sebagian besar konsumen merasa puas akan kinerja yang diberikan oleh Coffee Shop Taman Kopi. Namun, terdapat beberapa atribut yang memiliki tingkat kinerja yang rendah. Metode IPA menunjukkan atribut tampilan barista, jam operasional, Wi-fi, toilet dan Mushalla, serta event yang diselenggarakan sebagai atribut yang memiliki tingkat kepentingan yang tinggi dan tingkat kinerja yang rendah.
Keyword: CSI, IPA, karakteristik konsumen, keputusan pembelian

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