Judul: Biomass and Carbon Storage Estimation in Forest Areas with Special Management Sarongge
Abstrak: Hutan memiliki peran sangat penting dalam hal pemanasan global. Hutan sebagai penyerap alami dapat membantu mengurangi karbondioksida di atmosfer dan membantu memerangi perubahan iklim. Penelitian ini bertujuan menduga biomassa/simpanan karbon tegakan di atas permukaan tanah dan menentukan tingkat ketelitian pendugaan menggunakan metode tanpa dan dengan stratifikasi di KHDPK Sarongge, Kabupaten Cianjur.Metode penarikan contoh dalam pendugaan biomassa dan simpanan karbon di atas permukaan tanah menggunakan simple dan stratified systematic sampling with random start. Plot contoh sebanyak 54 buah berupa lingkaran (seluas 0,04 ha) dipilih secara sistematis berjarak 69 m. Hasil pendugaan dengan stratifikasi memiliki sampling error lebih kecil dibandingkan tanpa stratifikasi, sehingga nilai dugaan biomassa dan simpanan karbon di atas permukaan tanah di KHDPK Sarongge sebesar 1.519 ton/ha dan 727,59 ton/ha., Forests play a vital role in global warming. Forests, as natural absorbers, can help reduce carbon dioxide in the atmosphere and fight climate change. The study aims to assume biomass and carbon storage stagnation on the surface of the soil and determine the severity of the assumption using methods without and with stratification in Sarongge, Cianjur district. Examples include biomass assumption and carbon storage over the soil surface using simple and stratified systematic sampling with a random start. Plot samples consisting of 54 pieces, forming circles over 0.04 ha, are systematically selected at distances of 69 m. Assumption results with stratification have smaller sampling errors compared to without stratification, so the assumptions of biomass and carbon stockpiling over land surface in KHDPK Sarongge are 1.519 tons/ha and 727,59 tons/ha.
Keyword: agroforestry, biomass, carbon storage, clutch, KHDPK

Judul: Pendugaan Cadangan Karbon dan Serapan CO2 pada Tegakan Taman Hutan Kota Muhammad Sabki di Provinsi Jambi
Abstrak: Hutan memiliki peran penting dalam mitigasi perubahan iklim dan pemanasan global. Hutan menyerap CO2 kemudian menyimpannya dalam bentuk cadangan karbon. Penelitian ini bertujuan untuk mengestimasi kerapatan tegakan, biomassa, cadangan karbon dan serapan CO2 di Taman Hutan Kota Muhammad Sabki (THKMS), Jambi. Parameter tegakan THKMS (yaitu, jenis pohon, diameter, dan tinggi total) diukur dengan membuat 42 petak contoh lingkaran (masing-masing berukuran 0,04 ha) secara sistematis dengan jarak 38 × 38 m. Pendugaan nilai dugaan tegakan dilakukan dengan menggunakan metode stratifikasi dan tanpa stratifikasi berdasarkan zona penggunaan lahan untuk wisata. Hasil penelitian menunjukkan bahwa pendugaan dengan stratifikasi menghasilkan sampling error (SE) yang lebih kecil. Rata-rata jumlah pohon, lbds, biomassa, cadangan karbon, serapan CO2 tegakan THKMS adalah 706 pohon/ha, 21,65 m2/ha, 145,87 ton/ha, 68,56 ton/ha dan 249,04 ton/ha dengan total 706 pohon. pohon/ha, 21,65 m2/ha, 145,87 ton/ha, 68,56 ton/ha dan 249,04 ton/ha., Forest has an important role in the mitigation of climate change and global warming. Forest absorbs CO2 then store it in a form of carbon stock. This study aimed to estimate stand density, biomass, carbon stock and CO2 sequestration in Muhammad Sabki Urban Forest Park (MSUFP), Jambi. The MSUFP stand attributes (i.e., tree species, diameter, and total height) were measured by establishing 42 circular sample plots (each measuring 0.04 ha) in a systematic way with a distance of 38 × 38 m. The estimation of stand attributes was conducted by using stratification and without stratification method based on a land usage zone for tourism. The results showed that the estimation with stratification resulted in a smaller sampling error (SE). The average number of trees, basal area, biomass, carbon stock, CO2 absorption of the MSUFP stands were 706 trees/ha, 21.65 m2/ha, 145.87 tons/ha, 68.56 tons/ha and 249.04 tons/ha with a total of 706 trees/ha, 21.65 m2/ha, 145.87 tons/ha, 68.56 tons/ha and 249.04 tons/ha, respectively.
Keyword: kerapatan tegakan, biomassa, karbon, karbon dioksida, THKMS

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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