Judul: Analisis Pengaruh Bauran Promosi Terhadap Keputusan Kunjungan Wisata Danau Toba Kabupaten Toba Samosir, Sumatera Utara.
Abstrak: Sektor pariwisata merupakan sektor yang potensial untuk dikembangkan sebagai sumber pendapatan bagi suatu daerah. Danau Toba merupakan danau vulkanik terbesar di dunia yang terletak di Sumatera Utara dan juga dikenal sebagai danau terdalam di dunia sekaligus danau terbesar ke-2 di dunia setelah Danau Victoria di Afrika. Tujuan penelitian adalah : (1) Mengidentifikasi Karakteristik konsumen wisata Danau Toba. (2) Menganalisis proses pengambilan keputusan konsumen untuk berkunjung ke wisata Danau Toba. (3) Menganalisis Pengaruh bauran promosi seperti periklanan (advertising), promosi penjualan (sales promotion), hubungan masyarakat (public relation), dan pemasaran langsung (direct selling) terhadap keputusan kunjungan konsumen berkunjung ke wisata Danau Toba. Metode pengolahan yang digunakan mengolah data dengan menguji Validitas dan Reliabilitas Kuesioner dengan menggunakan SPSS (Stastistical Product and Service Solution). Alat analisis yang digunakan untuk melihat pengaruh bauran promosi terhadap keputusan kunjungan wisata Danau Toba menggunakan alat analisis SEM (Structure Equation Modelling).
Keyword: bauran promosi, keputusan kunjungan wisata, Stastistical Product and Service Solution (SPSS), Structure Equation Modelling (SEM)

Judul: Analisis Pengaruh Bauran Promosi terhadap Keputusan Berkunjung pada Wisata Danau Linow, Sulawesi Utara
Abstrak: Salah satu tempat wisata alam di Indonesia yang menarik untuk dikunjungi oleh wisatawan lokal maupun mancanegara adalah Danau Linow yang berada di Sulawesi Utara. Sebuah promosi sangat dibutuhkan untuk memperkenalkan objek wisata yang ada agar mampu menjadi ikon wisata dari daerah tersebut. Penelitian ini bertujuan untuk mengetahui apakah (1) bauran promosi periklanan, (2) promosi penjualan, (3) hubungan masyarakat dan (4) pemasaran langsung berpengaruh terhadap keputusan kunjungan di wisata Danau Linow. Data primer diperoleh melalui wawancara dan kuesioner, data sekunder diperoleh dari literatur yang relevan. Pengolahan data menggunakan metode SEM dengan program SmartPLS 3.2.6. Hasil penelitian menunjukkan bahwa promosi penjualan, hubungan masyarakat dan pemasaran langsung berpengaruh positif terhadap pengambilan keputusan berkunjung. Periklanan tidak memiliki pengaruh nyata terhadap pengambilan keputusan berkunjung wisatawan pada Wisata Danau Linow.
Keyword: Bauran Promosi, Keputusan Berkunjung, 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