Judul: Resilience of Households Traders in Turan Amis DAM Tourism Village in Facing the Impact of the Covid-19 Pandemic
Abstrak: Pandemi Covid-19 mengakibatkan penurunan pengunjung dan pendapatan di sektor pariwisata di Desa Wisata DAM Turan Amis. Penelitian ini bertujuan untuk menganalisis hubungan antara modal pembentuk resiliensi masyarakat dengan resiliensi. Penelitian menggunakan metode sequential exploratory design dengan melibatkan 35 pedagang sebagai responden. Hasil dari penelitian yaitu dampak pandemi Covid-19 cukup memengaruhi perubahan tingkat pendapatan responden karena tidak merubah mata pencaharian ke sektor pertanian. Modal pembentuk resiliensi berupa modal alam dimanfaatkan dengan menanam lombok, tomat, dan sayuran. Lalu, modal sosial connectednes yang dibentuk berupa kepercayaan dan keterlibatan. Keterampilan yang paling pandai yaitu penentuan harga dan promosi, kemudian modal keuangan yang paling banyak dimiliki yaitu tabungan. Resiliensi rumah tangga berupa resiliensi sebagai stabilitas terhadap bencana. Responden penelitian sudah tidak khawatir berinteraksi dan mendapat bantuan tenaga serta keuangan dari anggota keluarganya. Dampak pandemi Covid-19, tingkat pemanfaatan lahan, connectedness, dan jenis aset yang dimiliki mempunyai korelasi dengan resiliensi secara signifikan., The Covid-19 pandemic has resulted in a decrease in visitors and income in the tourism sector in the DAM Turan Amis Tourism Village. This research aims to analyze the relationship between capital that forms community resilience and resilience. Research uses methods sequential exploratory design involving 35 traders as respondents. The results of the research were that the impact of the Covid 19 pandemic had quite an impact on changes in respondents' income levels because it did not change their livelihoods to the agricultural sector. Resilience-forming capital in the form of natural capital is utilized by planting chili peppers, tomatoes and vegetables. Then, social capital connectednes formed in the form of trust and involvement. The most clever skills are pricing and promotion, then the financial capital that is most owned is savings. Household resilience takes the form of resilience as stability against disasters. Research respondents were no longer worried about interacting and received physical and financial assistance from their family members. The impact of the Covid-19 pandemic, the level of land use, connectedness, and the type of assets owned has a significant correlation with resilience.
Keyword: Household resilience, Impact of the Covid-19 pandemic, Resilience forming capital

Judul: Community Resilience Around Nature Tourism Situ Gunung in the Era of COVID-19 Pandemic
Abstrak: Pandemi COVID-19 telah menyebabkan kerugian pada sektor pariwisata dan masyarakat sekitarnya, termasuk masyarakat sekitar kawasan wisata alam Situ Gunung. Adaptasi diperlukan masyarakat untuk mencapai resiliensi. Penelitian ini bertujuan untuk menganalisis persepsi masyarakat terhadap dampak, strategi adaptasi dan strategi mitigasinya dalam situasi pandemi COVID-19. Metode yang digunakan adalah survei rumah tangga dengan menggunakan kuesioner dan wawancara berdasarkan metode penentuan sampel dengan tabel Isaac dan Michael pada tingkat kesalahan 10%. Hasil penelitian menunjukkan bahwa pandemi COVID-19 telah berdampak ekonomi pada kehidupan masyarakat namun tidak menimbulkan dampak sosial. Kapasitas adaptasi masyarakat masih rendah, strategi adaptasi dilakukan oleh masyarakat dengan kondisi perekonomian rentan berdasarkan karakteristik pekerjaannya. Strategi mitigasi sudah dimiliki masyarakat namun masih dalam inisiatif di tingkat rumah tangga, The COVID-19 pandemic has caused losses to the tourism sector and surrounding communities, including the communities around the Situ Gunung natural tourism area. Adaptation is necessary for society to achieve resilience. This study aims to analyze people's perception of the impact, adaptation strategy, and mitigation strategy in the situation of the COVID-19 pandemic. The method used is a household survey using questionnaires and interviews based on the determining samples method with Isaac and Michael tables at a 10% error rate. The results showed that the COVID-19 pandemic has had a negative economic impact on people's lives but has no negative social impact. The adaptation capacity of the community is still low, the adaptation strategy is carried out by people with vulnerable economic conditions based on the characteristics of their job. The community, particularly at a household level, already has mitigation strategies.
Keyword: community, covid-19, resilience, tourism

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