Judul: Pengembangan Bisnis Berkelanjutan dalam Rangka Restorasi Gambut di Kabupaten Siak, Provinsi Riau
Abstrak: Kebakaran hutan dan lahan (karhutla) menimbulkan dampak yang besar segi lingkungan, pendidikan, ekonomi, politik, kesehatan, dan sosial. Salah satu penyebab karhutla adalah penggunakan api dalam proses persiapan lahan. Penelitian ini dilakukan di Kabupaten Siak, Provinsi Riau dengan mengumpulkan data primer melalui observasi, Focus Group Discussion, dan wawancara; dan diperkaya dengan data sekunder. Analisis konten, Business Model Canvas, analisis biaya manfaat, analisis SWOT, dan analisis sensitivitas dilakukan untuk mengidentifikasi penyebab karhutla di gambut dan upaya terkait restorasi gambut; mengidentifikasi komoditas yang cocok diterapkan di lahan gambut; mengkaji pengembangan komoditas terpilih dan menghitung kelayakan bisnisnya. Model bisnis agroforestry karet, kopi, dan gaharu yang dipilih karena cocok secara ekologi dan layak secara finansial untuk diusahakan. Model ini memiliki NPV Rp 260.430.088, BCR 2,14, IRR 24%, dan Payback Period 2,37 tahun. Disamping memberikan manfaat ekonomi bagi masyarakat, pola pemanfaatan lahan dengan sistem agroforestry ini dapat meningkatkan jumlah serapan karbon dan merestorasi gambut, sehingga dapat berkontribusi pada agenda restorasi gambut dan capaian komitmen NDC. Kata kunci : Agroforestry, analisis biaya manfaat, karhutla, restorasi gambut, Kanvas Model Bisnis, Land and forest fires have caused a major impact on the environment, education, economy, politics, health, and social aspects. Forest and land fires is driven by the use of fire in land preparation process. This study was conducted in Siak District, Riau Province. Primary data were collected through observation, Focus Group Discussion, and interviews; and enriched with secondary data. Content analysis, Business Model Canvas, cost-benefit analysis, SWOT analysis, and sensitivity analysis were performed to identify the causes of forest and land fires in peatland; identify efforts in peatland restoration; identify suitable commodities on peatlands; and assess the development of selected commodities and calculate their business feasibility. Rubber, coffee, and agarwood agroforestry business model was selected because of its ecological suitability and financial feasibility. This model has an NPV value of Rp 260.430.088, BCR value of 2,14, IRR value of 24%, and a 2,37-year payback period. Besides providing economic benefits for the community, agroforestry system can improve carbon absorption and restore peatland. Hence, it can contribute to the peatland restoration agenda and the achievement of NDC commitments.
Keyword: Restorasi Gambut, agroforestry, Business Model Canvas, Analisis biaya manfaat, Karhutla, Agroforestry, forest and land fires, peatland restoration, Business Model Canvas, cost-benefit analysis

Judul: Identification of Factors Affecting the Success of Peat Restoration
Abstrak: Pemerintah melalui Badan Restorasi Gambut dan Mangrove (BRGM) berupaya memperbaiki dan memulihkan kondisi ekosistem lahan gambut pasca kebakaran besar tahun 2015 dengan strategi 3R (Rewetting), (Revegetation), dan (Revitalitation) di tujuh provinsi prioritas. Namun, BRGM belum mempunyai kriteria yang menjadi pedoman dalam menentukan keberhasilan restorasi gambut. Dengan melakukan identifikasi faktor-faktor yang memengaruhi keberhasilan restorasi gambut maka dapat memfokuskan kegiatan restorasi agar berjalan secara efektif dan efisien. Berdasarkan hasil analisis 33 artikel dengan Systematic Review, faktor ekonomi yang memengaruhi keberhasilan gambut adalah pembuatan pakan sendiri dan memperhatikan ketersediaan alami pakan, budidaya produk olahan turunan ekonomis dan pengolahan tanaman lokal yang dianggap gulma. Faktor lingkungan yang memengaruhi adalah lokasi, bahan dan jarak untuk sekat kanal, pemilihan jenis tanaman tepat untuk revegetasi dan pemanfaatan aliran air kanal yang tidak produktif dengan budidaya. Faktor sosial yang memengaruhi adalah pemilihan pendekatan pada masyarakat, cara penyadartahuan kelompok masyarakat dan pendampingan kelompok dengan pelatihan dan studi lapangan hingga berhasil mandiri., The government through the Peat and Mangrove Restoration Agency (BRGM) seeks to improve and restore the condition of the peatland ecosystem after the 2015 large fires with a 3R (Rewetting), (Revegetation) and (Revitalitation) strategies in seven priority provinces. However, BRGM does not yet have criteria to guide the success of peat restoration. By identifying the factors that influence the success of peat restoration, restoration activities can be focused on so that they can run effectively and efficiently. Based on the results of the analysis of 33 articles with the Systematic Review, it is found that the economic factors that influence the success of peat are making the feed itself and paying attention to the natural availability of feed, cultivation of processed products of economic derivatives and processing of local plants that are considered weeds. The environmental factors that influence are the location, material and distance of the canal blocking, the selection of the right types of plants for revegetation and the utilization of unproductive canal water flows through cultivation. Social factors that influence are the choice of approach to the community, how to raise awareness among community groups and group assistance with training and field studies until they are successful independently.
Keyword: Factors, fire, peat restoration success, Systematic Review

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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