Judul: Studi Toponim Terkait Nama Tanaman Dalam Rangka Peningkatan Identitas Lanskap dan Biodiversitas di DKI Jakarta
Abstrak: Jakarta has long history of its development was never separated from the community culture. Toponyms is the general term for any place names or geographical entity that based on an event or something that majority and abundant in some places. One of the toponym’s type that common and can be an identity of a place is associated with the name of the plant. However, with the development of the city, directly changes the land use and impact on green space, and even eliminated many species of plants that became an origin of the place names. According to BPS data in 2012, percentation of builded site in Jakarta is 64,91%. The purpose of this study are (1) to identification about the toponyms that related with the plant’s name in Jakarta, (2) observe the existence of plants in the related place, (3) analyze the potential landscape as a place to bring the element or setting that related with toponyms, (4) and also compile the suitable recomendation for revitalisation of identity that related with toponyms and to increase the biodiversity of plants. The methods used in this research through four stages, (1) the preparation phase, (2) data collection include the data landscape of Jakarta, the history data about the origin of toponyms that associated with the name of the plant, the characteristic of plants, the existence of a plant that related to the toponym, the potential of open green space, and the public knowledge and opinions about the toponym, (3) at the analysis phase, tracing the existence of a plant in that area, analyze the characteristics of plant, and analyze the potential of open green space, (4) and the synthesis phase is to provide recommendations for revitalizing the place identity to bring the plants back that associated with the toponyms and also for the improvement of plant biodiversity. The results of tracing place names in Jakarta obtained 23 districts or villages that associated with the names of plants that were found alot in the area, there are Gambir, Kebon Melati, Kebon Kacang, Menteng, Kebon Sirih, Bungur, Johar Baru, Cempaka Putih, Kelapa Gading, Kebon Bawang, Warakas, Pisangan Baru, Bambu Apus, Kampung Rambutan, Kebon Manggis, Kayu Manis, Kebon Pala, Bintaro, Srengseng Sawah, Pondok Labu, Gandaria, Duri Kosambi, Kedoya, Kemanggisan, and Kebon Jeruk. There are 24 kinds of plants consisting of 16 trees, 3 of shrubs, 3 of herbaceous plants, and 2 of the vines. The majority of the plant is the production plants and identifier ecosystem plants. Currently 11 species of plants have been unable to be found or planted in those areas like gambir, peanut, onion and garlic plants, kosambi, manggis, srengseng, citrus plant, apus bamboo, cinnamon, pala, and gandaria. The results of public perception analysis is only few people knew about the history of toponyms. All respondents agreed that the identity of the place's is extremely important as a differentiator and identifier that makes it easy to recognize the place. The type of open green space that much found on that place are urban forest, the green line and the public and private park. The
Keyword: Toponym, Jakarta, identity, Biodiversity

Judul: Kajian Lanskap Berdasarkan Toponimi di Kecamatan Gambir, Jakarta Pusat
Abstrak: berfungsi sebagai identitas tempat. Di Indonesia, hal ini berhubungan erat dengan kondisi dari lingkungan, dan masyarakatnya, seperti flora, fauna, kondisi geografis, peristiwa, kebiasaan, maupun legenda. Penelitian ini dilaksanakan di Kecamatan Gambir, Jakarta Pusat untuk menelusuri informasi mengenai toponimi dari kawasan ini, berkaitan erat dengan masyarakat dan karakteristik lanskapnya. Metode yang digunakan mencakup studi pustaka, peta fokus, survei dan observasi lapang, serta kuesioner dan wawancara, yang mana dianalisis dengan metode deskriptif dasar dan secara spasial. Studi pustaka yang dilaksanakan memunculkan 3 teori asal mula toponimi, yaitu tumbuhan gambir (Uncaria gambir), Letnan Belanda Gambier, dan tradisi ‘nyirih’. Peta fokus adalah panduan untuk metode survei dan observasi lapang, dimaksudkan untuk menentukan area pusat kajian. Kuesioner disebarkan kepada dua kelompok responden, para ‘ahli’ dan ‘masyarakat’, dan wawancara dilaksanakan pula pada beberapa responden di saat pengisian kuisioner. Hasil analisis menunjukkan para responden memilih teori tumbuhan gambir sebagai asal mula utama toponimi kawasan, berefek pada pilihan penanaman kembali sebagai upaya penguatan karakteristik dan pemilihan taman kota sebagai lanskap yang paling potensial untuk meletakkan elemen penguat karakteristik lanskap. Sintesis disusun dalam bentuk rekomendasi untuk menguatkan karakteristik lanskap berdasarkan toponimi kawasan. Rekomendasirekomendasi yang telah dirumuskan dimaksudkan sebagai cara untuk mengedukasi masyarakat akan toponimi Kecamatan Gambir serta dapat digunakan sebagai salah satu acuan perencanaan manajemen kawasan.
Keyword: identitas kawasan, karakteristik lanskap, Kecamatan Gambir, perspektif masyarakat, toponimi

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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