Judul: The Green Infrastructure Concept Based on Waterlogging Mitigation in the Street Landscape of Sungai Penuh City, Jambi Province
Abstrak: Keberadaan jalan di suatu wilayah merupakan bagian penting peradaban manusia. Jalan berperan dalam interaksi ruang sosial, distribusi barang/jasa untuk pembangunan, aktivitas sosial masyarakat, dan meminimalkan kesenjangan antar wilayah. Berkembangnya peradaban manusia di area-area terpencil, perdesaan, hingga perkotaan juga tumbuh dari keberadaan jalan sebagai sirkulasi utamanya. Peradaban manusia yang tumbuh secara masif di wilayah perkotaan oleh manusia juga menyertai isu lingkungan hidup yang berkembang bersamaan. Banyak kasus perencanaan ruang publik dan ruang sosial suatu wilayah di Indonesia tidak diiringi oleh perencanaan ruang terbuka hijau yang berfungsi sebagai border/katalisator/penyeimbang lingkungan yang sehat di wilayah itu. Perencanaan yang belum sempurna ini melahirkan dampak fenomena alam seperti banjir, genangan air/runoff pada jalan, dan cuaca panas saat musim panas. Oleh karena itu, diharapkan Model Infrastruktur Hijau Berbasis Mitigasi Genangan Air di Lanskap Jalan Kota Sungai Penuh, Provinsi Jambi dapat mengurangi permasalahan urban heat island, titik-titik genangan air, banjir, serta sebagai disiplin transportasi, pejalan kaki, dan wadah ekologis dan estetika bagi masyarakat Kota Sungai Penuh. Metode penelitian ini adalah deskriptif dengan pendekatan kualitatif dan spasial. Hasil akhir dari penelitian ini adalah gambaran konsep fisik infrastruktur hijau pada jalan di Kota Sungai Penuh. Kata Kunci: Genangan, Ekologi, Infrastruktur Hijau, Complete Street, Stormwater Management., The availability of road is an important part of human civilization. Roads play a role in the interaction of social space, distribution of goods and services for development, community social activities, and minimizing gaps between regions. The roads as main circulation was helped the evolved of human civilization in rural and urban areas. The human civilization who has grows massively in urban areas also accompanies environmental issues that develop simultaneously. Many cases of planning public spaces and social spaces of a region in Indonesia are not accompanied by planning green open spaces that serve as borders, catalysts, or balancers for a healthy environment in the region. Imperfect planning does not help cities deal with the impact of natural phenomena such as urban heat island, flooding, run-off on roads, discipline for transportation and pedestrian. This study used descriptive qualitative method. The final result of this study is an overview of the physical concept of Green Infrastructure on the roads in Sungai Penuh City. Keyword: Run-off, Ecology, Green Infrastructure, Complete Street, Stormwater Management.
Keyword: Ecology, Green Infrastructure, Complete Street, Stormwater Management

Judul: Landscape Design in Sultan Agung Street (Batu City) with Stormwater Management Application Based on Green Infrastructure
Abstrak: Fenomena meningkatnya volume runoff di lanskap perkotaan yang disebabkan oleh berkurangnya area resapan air hujan kerap terjadi di Indonesia, tak terkecuali di Jalan Sultan Agung, Kota Batu. Solusi alternatif yang dapat dilakukan untuk mengelola air hujan adalah dengan mengaplikasikan green infrastructure. Tujuan dari penelitian ini adalah: (1) mengidentifikasi kondisi lanskap jalan dan sistem drainase; (2) menganalisis dan membuat sintesis dari potensi dan kendala; dan (3) membuat desain lanskap Jalan Sultan Agung dengan aplikasi manajemen stormwater berbasis green infrastructure. Penelitian dilakukan dengan metode deskriptif kualitatif yang terdiri atas tahap persiapan, inventarisasi, analisis dan sintesis, konsep, serta desain. Hasil penelitian menunjukkan bahwa Jalan Sultan Agung memiliki luas total sebesar ±30850 m2 dan memiliki sistem drainase terbuka serta tertutup. Tapak memiliki volume runoff yang cukup besar namun juga memiliki potensi untuk diaplikasikan green infrastructure pada median jalan dan trotoar. Sistem green infrastructure yang digunakan dalam desain meliputi rain garden, stormwater trees, stormwater bump-outs, permeable pavers, dan stormwater planter. Desain lanskap yang dihasilkan dapat mengurangi volume runoff dari kondisi eksisting sebanyak 62,1%., The phenomenon of increasing runoff volume in urban landscapes caused by reduced rainwater infiltration areas often occurs in Indonesia, including Sultan Agung street, Batu City. An alternative solution that can be done to manage rainwater is to apply green infrastructure. The aims of this study are: (1) to identify the condition of street landscapes and drainage systems; (2) to analyze and make a synthesis of the potential and constraints; and (3) to design the landscape of Sultan Agung street with stormwater management application based on green infrastructure. The research was conducted using a qualitative descriptive method consisting of a preparation stage, an inventory stage, analysis and synthesis stage, a concept stage, and a design stage. The results showed that Sultan Agung street has a total area of ±30850 m2 and has an open and closed drainage system. The site has quite a large volume of runoff but also has the potential to apply green infrastructure at the road medians and sidewalks The green infrastructure systems used in the design include rain gardens, stormwater trees, stormwater bump-outs, permeable pavers, and stormwater planters. The landscape design can reduce the runoff volume from the existing conditions by 62,1%.
Keyword: green infrastructure, landscape design, stormwater management, streetscape

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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