Judul: Community Perception and Participation in the Development and Management of the Sipinsur Geosite Area Before and During the Pandemic
Abstrak: Objek wisata Sipinsur termasuk dalam KSPN Danau Toba. Penelitian ini menganalisis persepsi dan partisipasi masyarakat serta dampak ekonomi dan sosial terhadap pengembangan Geosite Sipinsur sebelum dan selama pandemi. Metodenya adalah analisis dengan skala likert dan analisis SWOT. Hasil penelitian yaitu persepsi masyarakat terhadap pengembangan aktivitas sebelum dan selama pandemi sangat tinggi yaitu 95,40% dan 86,52%. Sarana dan prasarana sebelum dan selama pandemi juga sangat tinggi yaitu 83,96% dan 80,81% serta kegiatan promosi dan pelayanan sebelum dan selama pandemi tinggi yaitu 71,05% dan sangat tinggi 82,59%. Partisipasi masyarakat sebelum pandemi tinggi yaitu 77,34% sedangkan selama pandemi sedang dengan persentase 59,43%. Dampak positif meliputi pendidikan, interaksi sosial, kesempatan kerja, dan pendapatan. Dampak negatif mencakup perubahan sosial, pencemaran lingkungan, dan keamanan. Strategi pengembangan Geosite Sipinsur pada kuadran I, menunjukkan posisi growth-oriented strategy., The Sipinsur tourist attraction is included in the Lake Toba KSPN. This research analyzes community perception and participation as well as the economic and social impacts of the development of the Sipinsur Geosite before and during the pandemic. The method is analysis with a likert scale and SWOT analysis. The research results show that public perception of activity development before and during the pandemic is very high, namely 95,40% and 86,52%. Facilities and infrastructure before and during the pandemic were also very high, namely 83,96% and 80,81%, and promotional activities and services before and during the pandemic were high, namely 71,05% and very high 82,59%. Community participation before the pandemic was high, namely 77,4%, while during the pandemic it was moderate with a percentage of 59,43%. Positive impacts include education, social interaction, employment opportunities, and income. Negative impacts include social change, environmental pollution, and security. The development strategy places the Sipinsur Geosite in quadrant I, indicating a growth-oriented strategy.
Keyword: partisipasi, Persepsi, Strategi, participation, perception, Strategy, Pandemi, Skala likert, Likert scale, pandemic

Judul: The Impact of the Covid-19 Pandemic  on the Community’s Economy in Cidahu Tourist Area, District of Sukabumi, West  Java
Abstrak: Pandemi Covid-19 muncul pada akhir tahun 2019, dengan penyebaran virus yang cepat dan berdampak signifikan di berbagai sektor, salah satunya pariwisata. Kunjungan wisatawan menurun drastis, seperti yang terjadi di kawasan wisata Desa Cidahu, Sukabumi, Jawa Barat yang berbatasan dengan TNGHS. Penelitian ini bertujuan mengidentifikasi persepsi masyarakat mengenai dampak pandemi Covid 19 terhadap perekonomian masyarakat dan strategi mitigasi dalam menghadapi pandemi dari aspek ekonomi. Melalui survei kuesioner rumah tangga, wawancara, observasi lapang, dan studi literatur dengan analisis kuantitatif dan kualitatif, diketahui bahwa pandemi Covid-19 berdampak pada perekonomian masyarakat. Masyarakat mengalami penurunan pendapatan dan mengurangi konsumsi rumah tangga sebagai upaya pertahanan. Meski demikian, masyarakat tidak termotivasi mencari pekerjaan lain, tetapi cenderung mengembangkan dan berinovasi pada bidang pekerjaan yang sudah ditekuni. Strategi mitigasi yang bisa dilakukan oleh masyarakat untuk menghadapi situasi pandemi di antaranya mengoptimalkan sumberdaya, menambah objek wisata minat khusus, mencari alternatif pekerjaan, membuat inovasi pengelolaan wisata. Untuk mewujudkan strategi mitigasi tersebut, diperlukan peningkatkan kapasitas SDM bagi pengelola dan masyarakat sekitar., The Covid-19 pandemic emerged at the end of 2019, with the rapid spread of the virus causing a significant impact on various sectors; one was the tourism. Tourist visits have decreased drastically as happened in the tourist area of Cidahu Village, Sukabumi, West Java, which is adjacent to the TNGHS. This study aimed to identify public perceptions regarding the impact of the Covid-19 pandemic on the community's economy and mitigation strategies in dealing with a pandemic from an economic perspective. Through household questionnaire surveys, interviews, field observations, and literature studies with quantitative and qualitative analysis, the Covid-19 pandemic had impacted the people's economy. The community experienced a decrease in income and reduced household consumption as a means of defense. Even so, people are not motivated to look for other jobs but tend to develop and innovate in the fields of work that have been occupied. Mitigation strategies that can be carried out by the community to deal with a pandemic situation are optimizing existing resources, adding special interest tourist objects, finding alternative jobs, and innovating tourism management. It is necessary to improve the human resources capacity for managers and the surrounding community to realize the strategies.
Keyword: covid-19 pandemic, mitigation, perception

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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