Judul: The Effectiveness of the Post-Covid-19 Marketing Communication Mix in the Sembungan Tourism Village, Wonosobo Regency, Central Java
Abstrak: Penelitian ini bertujuan untuk mendeskripsikan bentuk bauran komunikasi pemasaran yang diterima pengunjung, menganalisis efektivitas bauran komunikasi pemasaran, serta hubungan antara karakteristik dan keterdedahan pengunjung dengan efektivitas bauran komunikasi pemasaran. Kehadiran Covid-19 berdampak pada penurunan jumlah pengunjung Desa Wisata Sembungan sehingga perlu dilihat efektivitas bauran komunikasi pemasarannya pascapandemi Covid-19. Metode penelitian menggunakan survei dengan instrumen kuesioner kepada 60 responden yang dipilih menggunakan metode accidental sampling dan data diolah secara non- parametic statistics. Hasil penelitian menunjukkan bahwa kegiatan bauran komunikasi pemasaran yang dilakukan oleh pengelola Desa Wisata Sembungan masih belum efektif dan hanya media komunikasi pemasaran Word of Mouth, baik secara tatap muka maupun e-WOM, yang diterima pengunjung. Terdapat hubungan signifikan pada variabel usia dan jenis kelamin dengan aspek afektif, variabel motivasi dan frekuensi penerimaan pesan dengan aspek konatif, serta variabel informasi penerimaan pesan dengan aspek kognitif dan afektif., This study aims to describe the form of marketing communication mix received by visitors, analyze the effectiveness of the marketing communication mix, and the relationship between visitor characteristics and visitation with the effectiveness of the marketing communication mix. The presence of Covid-19 has an impact on the decline in the number of visitors to Sembungan Tourism Village so it is necessary to see the effectiveness of the marketing communication mix after the Covid-19 pandemic. The research method used a survey with a questionnaire instrument to 60 respondents selected using the accidental sampling method and the data were processed using non-parametric statistics. The results showed that the marketing communication mix activities carried out by the Sembungan Tourism Village manager were still ineffective and only Word of Mouth marketing communication media, both face-to-face and e-WOM, were received by visitors. There is a significant relationship between the variables of age and gender with affective aspects, the variables of motivation and frequency of message reception with conative aspects, and the variables of message reception information with cognitive and affective aspects.
Keyword: marketing communication mix, effectiveness, post-Covid-19

Judul: The Effectiveness of Business Communication in the Management of Saung Ciburial Tourism in Sukalaksana Village Garut, West Java
Abstrak: Desa wisata menjadi andalan pembangunan pariwisata di Indonesia. Salah satu desa wisata berbasis Community Based Tourism adalah Desa Wisata Saung Ciburial. Pengelola Desa Wisata Saung Ciburial menggabungkan media komunikasi konvensional dan modern untuk promosi wisata. Tujuan dari penelitian ini adalah menganalisis efektivitas komunikasi bisnis dalam pengelolaan Desa Wisata Saung Ciburial. Metode survei dan wawancara digunakan untuk pengumpulan data, kemudian data dianalisis menggunakan uji korelasi Rank Spearman dan Chi-Square. Hasil penelitian ini menunjukkan bahwa mayoritas pengunjung berusia 15-29 tahun dengan etnik Sunda. Efektivitas komunikasi bisnis dapat menentukan kunjungan wisatawan. Jenis kelamin dan etnik memiliki hubungan yang signifikan dengan keputusan berkunjung dan kepuasan wisatawan. Sementara itu, terdapat hubungan sangat nyata antara media komunikasi dan tingkat keterdedahan media dengan efektivitas komunikasi bisnis pengelola Desa Wisata Saung Ciburial., Tourist villages are the mainstay of tourism development in Indonesia. One of the tourist villages based on Community Based Tourism is the Saung Ciburial Tourism Village. Saung Ciburial Tourism Village managers combine conventional and modern communication media for tourism promotion. The aim of this research is to analyze the effectiveness of business communication in the management of the Saung Ciburial Tourism Village. Survey and interview methods were used for data collection, then the data were analyzed using the Spearman Rank correlation and Chi-Square tests. The results of this research show that the majority of visitors are aged 15-29 years with Sundanese ethnicity. The effectiveness of business communication can determine tourist visits. Gender and ethnicity have a significant relationship with visiting decisions and tourist satisfaction. Meanwhile, there is a very real relationship between communication media and the level of media exposure and the effectiveness of business communication by the management of the Saung Ciburial Tourism Village.
Keyword: Tourism Village, Business Communication Effectiveness, Media Exposure, Saung Ciburial

Judul: The Construction of Greedy SVP LLL Algorithm
Abstrak: A lattice is a set of all integer linear combination of a set of linearly independent vectors in ℝ𝑛���. The independent vectors are called bases of lattice. Any lattice can be generated from many bases, and these bases have the same cardinality. In the lattice, the most fundamental and renowned problem is the Shortest Vector Problem (SVP). SVP is a tracking problem of the shortest nonzero vector in a lattice with equivalent bases. In two dimensions, SVP problem has resolved exactly by Gauss’ algorithm. When the lattice dimension is higher than two, A.K. Lenstra, H.W. Lenstra and L. Lovasz gave a LLL algorithm to compute approximation of nonzero shortest vector in the lattice. Reduced bases solution obtained from LLL algorithm still be an approximation and has polynomial running time of arbitrary dimension which large enough. In 1994, Schnoor and Euchner modified this LLL algorithm as a new variant which later was named deep insertion LLL algorithm. This algorithm is a modified version of the LLL algorithm to the terms of the exchange step to improve the accuracy of output of LLL reduced bases and applying it to the subset sum problem. The purpose of this research are: (1) Reconstruct the LLL algorithm and deep insertion LLL algorithm using a geometric approach. (2) Construct a greedy SVP LLL algorithm. (3) Implement the three algorithms in a symbolic programming language, and evaluate them experimentally. A bases ℬ=[𝐛���1,𝐛���2,…,𝐛���𝑛���] in ℝ𝑚��� is called reduced LLL with parameter 𝛿��� if satisfies: (a) |𝜇���𝑗���𝑖���|≤12, for every integer 𝑖���,𝑗��� with 1≤𝑖���<𝑗���<𝑛���. (b)𝛿���‖𝜋���𝑗���(𝐛���𝑗���)‖2≤‖𝜋���𝑗���(𝐛���𝑗���+1)‖2, for 𝑗���=1,2,…,𝑛���−1,where 𝛿��� is a reduced parameter of real numbers with 14<𝛿���<1. The first requirement is the reduced basis 𝛿��� must “nearly orthogonal” and in its computation case, this requirement can be reached out by using the Gram-Schmidt’s orthogonalization. While the second requirement is called exchange step, or used to called as Lovasz condition. By using both of these requirements, then they establish the LLL algorithm. Then, Schnoor and Euchner modify the LLL algorithm based on the requirements of the exchange step called the deep insertion LLL algorithm, where the exchange step is based on the comparison of the projected vector in orthogonal complement [𝐛���1,𝐛���2,…,𝐛���𝑘���−1]⊥ after j-th reduction. To construct greedy SVP LLL algorithm, the requirements of the exchange step is based on purely by comparing norm of lattice 𝐛���𝑗��� with norm lattice 𝐛���𝑖��� for 𝑖���=1,2,3…,𝑗���−1. The process of insertion reduced vector after the exchange step also has done greedily. Then, we calculate the number of arithmetic operation in greedy SVP LLL algorithm for further analysis. The result of our exprimentation for three algorithms on the certain matrix size shows that the running time of the three algorithms increases propotional to the size of the matrix. The result also shows that by using 𝛿���=34 for the LLL algorithm and the deep insertion LLL algorithm, and the greedy SVP LLL algorithm which is a new variant made by using no parameter of 𝛿���, outperform of the other of two previous algorithm in terms of speed with the same output.
Keyword: LLL algorithm, LLL deep insertion algorithm, greedy SVP LLL algorithm