Judul: Evaluasi Kualitas Visual dan Fungsional Lapangan Golf Senayan National Golf Club
Abstrak: Senayan National Golf Club (SNGC) is one of the famous and the oldest golf course in Jakarta. Since SNGCunder the management ofAncoraGroup in 2011, it has been renovated on the theme of Reborn and adopted the concept of Botanical Herritage. These makes SNGC a great place for internship to studyvisualand functionalqualities ofthe golf course and turfgrass management. The methods of this internship is active and passive participation in the field. It was also evaluated about visual dan functional qualities of turfgrass and observed all maintenance procedure. Output of this internship is maintenance plan of turfgrass. The result of the evaluation are both Tee Box and Fairway area comply 8 indicators from 10 standard indicators of good quality (80%) and Green area comply 9 indicators from 11 standard indicators of good quality (81%), so that the visual and functional quality of SNGC already quite good because it has comply 80% of the standard indicators of good quality. The good qualities of Green, Tee Box, and Fairway due to the regular intensive maintenance
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Judul: Evaluation of Visual and Functional Quality of Grasses and Trees at RSJMM Heritage Golf Filed in Bogor City
Abstrak: RSJMM Heritage Golf Club merupakan lapangan golf tertua di Kota Bogor. Kualitas lapangan golf tergantung dari kualitas rumputnya, baik secara visual maupun fungsional. Selain itu, dipengaruhi pula oleh pohon yang menjadi tantangan alami permainan. Penelitian ini bertujuan: (1) mengevaluasi kualitas visual rumput dan pohon, (2) mengevaluasi kualitas fungsional rumput, dan (3) mengusulkan rekomendasi rencana pemeliharaan. Metode yang digunakan dalam penelitian ini adalah observasi, wawancara, dan kajian pustaka. Selanjutnya, data pengamatan dianalisis menggunakan uji korelasi Pearson, Binomial, dan Kruskal-Wallis. Hasilnya menunjukkan bahwa rata-rata kualitas visual pohon sangat baik. Sedangkan kualitas visual rumput menunjukkan: kerapatan rumput tergolong sedang untuk area green dan tinggi untuk area tee box dan fairway. Warna, keseragaman warna, Keberadaan partikel, dan tekstur 3 area memenuhi standar. Kualitas fungsional rumput menunjukkan bahwa tinggi pangkasan di 3 area, berat kering pucuk, berat kering akar, dan panjang akar selain 1 area memenuhi standar. Elastisitas rumput termasuk dalam kategori fast dan medium fast untuk permainan reguler. Penelitian ini menghasilkan rekomendasi rencana pemeliharaan untuk meningkatkan kualitas RSJMM Heritage Golf Club.
Keyword: functional quality, visual quality, golf course, maintenance plan

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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