Judul: Model Rain Garden dalam Mewujudkan Green Campus 2020 di IPB Dramaga, Bogor
Abstrak: Kebijakan mengenai penggunaan air baku di Kampus IPB Darmaga hanya melalui pengolahan Sungai Cihideung dan Sungai Ciapus. Pengolahan air sungai tidak selalu dapat diunggulkan karena kualitas dan kuantitas air sungai tidak stabil. Rain garden adalah solusi yang tepat sebagai penyedia air baku alternatif di Kampus IPB Darmaga melalui pemanenan air hujan. Tujuan penelitian adalah untuk memetakan lokasi rain garden berdasarkan penggunaan lahan sekitar Danau I IPB dan membuat model rain garden yang mendukung pemanenan air hujan. Penelitian ini menggunakan metode analisis tutupan lahan dan potensi genangan limpasan air hujan untuk menentukan lokasi rain garden, selain itu analisis kesesuaian tanaman juga digunakan untuk menyesuaikan fungsi tanaman dan karakteristik lokasi rain garden. Hasil penelitian ini berupa model rain garden yang mendukung pemanenan air hujan di IPB Kampus Darmaga, sehingga dapat dijadikan referensi bagi pengelola kampus untuk mengembangkan area terbuka biru yang produktif dalam mewujudkan Green campus 2020. KataKunci: kampushujau, pemanenan air, ruangterbukabiru, taman hujan, he policy regarding the use of raw water at Darmaga Campus of IPB is only through the treatment of Cihideung’s River and Ciapus’s River water. River water treatment cannot always be seeded because the quality and quantity of river water is unstable. Rain garden is the right solution as an alternative provider of raw water on the Darmaga Campus of IPB through rainwater harvesting. The research objectives is to map and review the function of the blue open space at the Darmaga campus of IPB and to create an alternative model of rain garden that supports rainwater harvesting. This research uses land cover and slope analysis methods to determine the location of the rain garden, besides that plant suitability analysis is also used to adjust plant functions and characteristics of rain garden locations. The results of this research are in the form of a rain garden model that is suitable for the Darmaga Campus IPB landscape, so it can be used as a reference for campus managers to develop a blue open area in realizing Green campus 2020. Keywords: blue open space, green campus, rain garden, water harvesting.
Keyword: blue open space, green campus, rain garden, water harvesting

Judul: Analysis of Rainwater Harvesting From Roof Building (Case Study: IPB Dramaga Campus Buildings Bogor).
Abstrak: The rise of the movement to save the environment for our next generation with the concept of green building becomes an important issue now. IPB which became part of Bogor city should take part to make it as a region as comfortable city of Bogor as a vision It had. One way of applying the concept of green building is to harvest the rain from the rooftops of the building. This study calculates the number of rainwater that can be harvested through the roof of the buildings on IPB Darmaga Bogor campus. Using monthly rainfall data average, broad roof of the building IPB Darmaga, then get the amount of rainwater that can be harvested. And using reference from the Technical Guidelines and Survey Procedures for Assessment of Drinking Water Supplies and Services and the Technical Guidelines Development Procedures Urban Water Supply Master Plan of the Directorate General of Public Works has the Department of Public Works to see in general the percentage of water which can be harvested to meet the needs of clean water for usage on campus. From analysis, water potential that can be harvested through the roof of the building on the campus of IPB Dramaga amounted to 319.734 m3 per year or equal to 52% of the average annual needs. Where, rainwater can be harvested in November, the highest (65%) and lowest in July (34%)
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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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