Judul: Pengaruh Selebriti Endorser Pemilik Usaha terhadap Keputusan Pasca Pembelian Geprek Bensu di Kota Bogor
Abstrak: Tren yang terjadi pada tahun 2017 adalah selebriti sebagai pemilik usaha menjadikan dirinya sendiri sebagai endorser dalam mempromosikan dan mengiklankan produk yang dimilikinya. Tujuan penelitian ini adalah untuk mendeskripsikan karakteristik konsumen responden dan menganalisis pengaruh selebriti endorser pemilik usaha terhadap keputusan pasca pembelian Geprek Bensu. Variabel selebriti endorser adalah attractiveness, trustworthiness, expertise dan respect. Pengambilan sampel menggunakan systematic random sampling. Data dianalisis menggunakan statistik deskriptif dan partial least square (PLS). Hasil penelitian menunjukan (1) karakteristik konsumen responden didominasi oleh konsumen pelajar/mahasiswa dengan rentang umur 15-24 tahun; (2) hanya variabel respect yang berpengaruh positif terhadap keputusan pasca pembelian. Penelitian ini merekomendasikan agar Ruben Onsu dan manajemen bersama-sama menjaga apresiasi dari masyarakat agar persepsi positif tetap terjaga sehingga akan terus berpengaruh positif terhadap keputusan pasca pembelian.
Keyword: attractiveness, expertise, PLS, respect, trustworthiness

Judul: Pengaruh Celebrity Endorser terhadap Kredibilitas Merek dan Ekuitas Merek Wardah Cosmetic di Kota Bogor
Abstrak: Industri kosmetik harus memiliki strategi yang tepat dalam mempertahankan peningkatan penjualannya. Strategi pemasaran yang dapat dilakukan salah satunya ialah periklanan. Salah satu cara menarik konsumen adalah dengan menggunakan endorser dalam mengiklankan produknya. Dalam memilih endorser, perusahaan harus selektif agar endorser mampu mengkomunikasikannya dengan tepat. Tujuan dari penelitian ini untuk menganalisis karakteristik responden konsumen Wardah Cosmetic di Kota Bogor, menganalisis pengaruh celebrity endorser terhadap kredibilitas merek Wardah Cosmetic di Kota Bogor, menganalisis pengaruh kredibilitas merek terhadap ekuitas merek Wardah Cosmetic di Kota Bogor, menganalisis pengaruh celebrity endorser terhadap kredibilitas merek dan ekuitas merek Wardah Cosmetic di Kota Bogor. Metode analisis yang digunakan adalah analisis deskriptif dan analisis Partial Least Square-Structural Equation Modeling (PLS-SEM). Hasil penelitian menunjukkan bahwa tujuh hipotesis ditolak dan sepuluh hipotesis lainnya diterima.
Keyword: celebrity endorser, ekuitas merek, kredibilitas merek, PLS-SEM

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