Judul: Perencanaan Kawasan Terbangun Lahan Kering di Kawasan Perdesaan
Abstrak: Salah satu faktor yang berpengaruh dalam produksi pertanian adalah lahan. Lahan yang dikelola akan mampu memberikan produksi yang berbeda-beda sesuai dengan tingkat produktivitasnya. Berdasarkan data dari Badan Pusat Statistik (BPS) tahun 2019, luas lahan kering nasional mencapai 63,4 juta hektar (33,7% luas lahan Indonesia). Hal ini menunjukkan bahwa potensi lahan kering sangat besar untuk dikembangkan. Penelitian ini dilakukan untuk merencanakan kawasan terbangun lahan kering di Kawasan Perdesaan yang ada di Kecamatan Warungkiara. Perencanaan kawasan agropolitan dianalisis menggunakan metode digitasi rupa bumi dan analisis dari data-data yang sudah dikumpulkan. Hasil penelitian menunjukkan bahwa terdapat beberapa penggunaan lahan di Kecamatan Warungkiara, yaitu pertanian daerah utara (1.308,49 ha), pertanian daerah tengah (2.795,41 ha), pertanian daerah selatan (2.424,01 ha), dan pemukiman (638,71 ha). Prasarana dan prasarana lahan kering pada kondisi eksisting masih kurang baik, sehingga diperlukan perencanaan prasarana kawasan terbangun., One of the influential factors in agricultural production is land. Land that is managed will be able to provide different production according to the level of productivity. Based on data from the Central Statistics Agency (BPS) in 2019, the national dryland area reached 63.4 million hectares (33.7% of Indonesia's land area). This shows that the potential of drylands is huge to be developed. This research was conducted to plan dryland built-up areas in the existing Rural Areas in Warungkiara District. The planning of agropolitan areas was analyzed using the method of earth shape digitation and analysis of the data that had been collected. The results showed that there are several land uses in Warungkiara Sub-district, namely northern agriculture (1,308.49 ha), central agriculture (2,795.41 ha), southern agriculture (2,424.01 ha), and settlements (638.71 ha). Dryland infrastructure and infrastructure in the existing condition is still not good, so it is necessary to plan the infrastructure of the built-up area.
Keyword: Agropolitan area, plantation, facilities and infrastructure, Warungkiara

Judul: Agropolitan Planning Based on Irrigation Area (Case Study of Cihea Irrigation Area, Cianjur Regency)
Abstrak: Hampir seluruh lahan pertanian di Indonesia berlokasi di perdesaan. Dengan kondisi itu, desa berperan penting untuk menyediakan suplai bahan pangan. Akan tetapi, terdapat kesenjangan antara wilayah perdesaan dan perkotaan. Untuk mengatasi hal tersebut, diperlukan perencanaan kawasan agropolitan. Salah satu wilayah pertanian di Indonesia berada di Daerah Irigasi (DI) Cihea. DI Cihea dibangun pada masa pemerintahan kolonial Belanda tahun 1879 sampai tahun 1904 dan mulai digunakan pada tahun 1914. DI Cihea memiliki luas area 5.484 hektar. Penelitian ini bertujuan merencanakan kawasan agropolitan di DI Cihea, Kabupaten Cianjur. Perencanaan kawasan agropolitan dianalisis menggunakan metode digitasi rupa bumi dan analisis dari data-data yang sudah dikumpulkan. Terdapat beberapa penggunaan lahan di DI Cihea, yaitu berupa pertanian tanaman pangan (6.180,29 ha), hutan (5.844,87 ha), kebun/pekarangan (2.807,36 ha), pemukiman (1.574,42 ha), perairan (479,34 ha), serta perdagangan (19,75 ha). Sarana dan prasarana yang terdapat pada DI Cihea adalah seperti jaringan jalan, jaringan irigasi, wilayah perdagangan, terminal, gudang, dan tempat penggilingan padi. Hasil analisis menunjukkan bahwa masih banyak sarana dan prasarana yang perlu dikembangkan., Almost all agricultural land in Indonesia is located in rural areas. Under these conditions, the village plays an important role in providing food supplies. However, there is a gap between rural and urban areas. To overcome this, it is necessary to plan agropolitan areas. One of the agricultural areas in Indonesia is in the Cihea Irrigation Area (DI). DI Cihea was built during the Dutch colonial administration from 1879 to 1904 and was put into use in 1914. DI Cihea has an area of 5.484 hectares. This study aims to plan an agropolitan area in DI Cihea, Cianjur Regency. Agropolitan area planning is analyzed using the topographical digitization method and analysis of the data that has been collected. There are several land uses in DI Cihea, namely in the form of food crop agriculture (6.180,29 ha), forests (5.844,87 ha), gardens (2.807,36 ha), settlements (1.574,42 ha), waters (479,34 ha), as well as trade (19,75 ha). Facilities and infrastructure contained in DI Cihea include a road network, irrigation network, trading areas, terminals, warehouses, and a rice mill. The results of the analysis show that there are still many facilities and infrastructure that need to be developed.
Keyword: Cihea Irrigation Area, agropolitan area, land use, facilities and  infrastructure

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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