Judul: Prioritas Lahan Sawah yang Dilindungi di Kota Sukabumi, Jawa Barat
Abstrak: Kota Sukabumi merupakan wilayah dengan posisi strategis karena berada di antara kawasan mega urban, yaitu Jabodetabek dan Bandung Raya. Kota Sukabumi masih memiliki lahan sawah yang luas. Dengan adanya UU No. 41 Tahun 2009 tentang lahan pertanian pangan berkelanjutan, Kota Sukabumi memiliki peluang yang sangat besar untuk melindungi lahan sawah.Untuk mengetahui persebaran lahan sawah digunakan citra IKONOS tahun 2012 dan Peta Lahan Sawah 2010. Selanjutnya regresi berganda dimanfaatkan untuk mengetahui faktor-faktor keberadaan lahan sawah. Skalogram diproses untuk mengetahui tingkat kelengkapan prasarana pertanian lahan sawah, serta membuat kriteria lahan sawah yang dilindungi untuk memilih lahan sawah yang akan dilindungi. Hasil analisis spasial menunjukkan, lahan sawah menyebar di seluruh kelurahan Kota Sukabumi, kecuali Kelurahan Tipar dan Kelurahan Gunungpuyuh. Lahan sawah tersebut telah sesuai dengan kondisi fisiknya dan menyebar pada berbagai jarak baik dari saluran irigasi dan jalan utama. Faktor yang memiliki pengaruh sangat nyata akan keberadaan lahan sawah di Kota Sukabumi antara lain; jarak saluran irigasi <100 m, kemiringan lereng <3 %, curah hujan 2500-3000 mm, dan jarak jalan utama antara <300 m. Tingkat kelengkapan prasarana pertanian pada setiap kelurahan terbagi Hirarki I (5 kelurahan), II (9 kelurahan) dan III (19 kelurahan). Lahan sawah yang termasuk pada prioritas 1, 2, dan 3 untuk dilindungi masing-masing 468.55 ha (29.68 %), 483.44 ha (30.62 %) dan 626.54 ha (39.69 %
Keyword: paddy field, factors inffluence, priority of paddy map

Judul: Prioritas Lahan Sawah yang Dilindungi di Kota Sukabumi, Jawa Barat
Abstrak: Sukabumi City has strategic position as it is located between the megaurban, Jabodetabek and Bandung Raya. This city has a large area of paddy field. Due to the existence of Act No 41, 2009 about sustainable agricultural land, then Sukabumi City has a tremendous opportunity to protect paddy field. We utilized IKONOS in 2012 and Paddy Field Map in 20120 to determine the distribution pattern of paddy field. Furthermore, multiple regression was employed to find out affecting factors of existing paddy field. Scallogram analysis was then utilized to find out the level of completeness of paddy field agricultural infrastructure and create a protected paddy field criteria for selecting paddy field to be protected. The spatial analysis showed that paddy field distributed in all villages expect Tipar Village and Gunungpuyuh Village. Paddy field has been in accordance with the physical condition and spread at various distances not only irrgation but also the main road. Factors that have a very real effect of exsisting paddy field in Sukabumi City were irrigation distance <100 m, slope <3 %, rainfall 2500-3000 mm, and main road distance <300 m. The completeness level of paddy field agricultural infrastructure in each villages divided 1st hierarchy (5 villages), 2nd hierarchy (9 villages), and 3rd hierarchy (19 villages). Paddy field that including 1st priority, 2nd priority, and 3rd priority were 468.55 ha (29.68 %), 483.44 ha (30.62 %) dan 626.54 ha (39.69 %).
Keyword: priority of paddy map., factors inffluence, paddy field

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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