Judul: Trend Tata Hijau, Kualitas Rumput Dan Pohon Pada Area Permainan Lapangan Golf Sedana Golf And Country Club Karawang Jawa Barat
Abstrak: Sedana Golf and Country Club merupakan salah satu lapangan golf terkenal di Karawang, Jawa Barat yang dirancang oleh Mark Rathert di atas tanah seluas 75 hektar. Penelitian ini bertujuan untuk mengetahui trend tata hijau pada area permainan lapangan golf, untuk mengevaluasi kualitas fungsional dan visual rumput, untuk mengevaluasi kualitas visual pohon, dan untuk menyusun rekomendasi tata hijau pada lapangan golf SGCC. Trend tata hijau dapat diketahui dari jenis tanaman dan penataan tanaman yang digunakan. Untuk mengetahui jenis-jenis tanaman yang digunakan pada tiap hole, tanaman-tanaman tersebut dihitung nilai dominansi, frekuensi, kelimpahan, dan indeks keragaman menggunakan metode Shannon-Wiener. Aspek fungsi dan estetika dari masingmasing area juga dinilai dengan cara membandingkan kondisi lapang dengan kriteria ideal yang didapat dari studi pustaka. Hasil penelitian ini menunjukkan bahwa tanaman dengan nilai kelimpahan, frekuensi, dan dominansi tertinggi adalah rumput bermuda (Cynodon dactylon). Indeks keragaman pohon pada sebagian besar lokasi studi tergolong sedang. Demikian pula indeks keragaman jenis semak dan tanaman penutup tanah tergolong rendah. Penilaian aspek fungsi tanaman pada lokasi studi tergolong baik, sedangkan aspek estetika tanaman pada lokasi studi tergolong buruk. Hal tersebut dikarenakan pemilihan jenis tanaman yang monoton dan tiap hole tidak mempunyai pohon penciri yang khas. Secara umum, pola penanaman di SGCC pada bagian tee box dapat dibedakan menjadi tiga tipe, yaitu tipe berkelompok, tipe menerus, dan kombinasi tipe berkelompok dan menerus. Pola penanaman pada bagian fairway dapat dibedakan menjadi dua tipe penanaman, yaitu tipe menerus, dan kombinasi tipe menerus dan berkelompok. Tipe penanaman pada bagian green dibedakan menjadi dua tipe, yaitu tipe menerus dan berkelompok. Kualitas fungsional dan visual rumput lapangan golf SGCC tergolong baik pada area permainan karena telah memenuhi 80% dan 61% dari indikator standar kualitas baik. Sedangkan kualitas visual pohon pada lokasi studi tergolong sangat baik. Trend tata hijau pada lapangan golf SGCC secara keseluruhan menggunakan tanaman jenis palem (Arecaceae) dengan setiap hole ditambahkan vegetasi penyemarak seperti kayu putih (Melaleuca cajuputi), dadap merah (Erythrina crista-galli), nusa indah (Mussaenda philippica), dan tabebuya bunga kuning (Tabebuia rosea). Penataan tanaman pada sebagian besar lokasi studi menggunakan pola linear mengikuti bentukan hole.
Keyword: aspek estetika, aspek fungsi, kualitas rumput, tata hijau, trend

Judul: Trend Tata Hijau pada Lanskap Area Permainan Lapangan Golf Klub Golf Bogor Raya
Abstrak: Arrangement of plants is important in a golf course landscape which it add beauty, functions for comfort. The purpose of this research was to know the trend of green system in each landscape units of KGBR golf course that indicated by plant diversity and arrangement of plants. The research was also aimed to draw up recommendation on the green system of golf course. Diversity of plants on KGBR golf course were observed including value of frequency, value of abundance, dominance of species, and diversity index of plant. The function and aesthetic aspects of the plants was also analyzed by comparing the existing condition with ideal criteria obtained from study of literatures. Results of studies indicated that the plant with highest value of dominance, frequency, and abundance in most of golf course was Bermuda grass (Cynodon dactylon var. ’tifway’). The trend of green system in KGBR was designed with the concept of arboretum or collection of trees species ,which can be seen from the plants selection was mostly the type of trees. The diversity index of trees and shrubs in most of study area was classified in medium diversity. Meanwhile, groundcover plants in most of study area was classified in low diversity. Study area with highest diversity index of tree species (2,98) was found in area of 10th hole. The functional aspect in most of area studies is good and very good. The trend of plants arrangement in tee box and fairway in KGBR can grouped into three types, such as: line planting type, group planting type, and combination both line and group planting type. The plant arrangement in green areas was classified into two types, such as arrangement that only used tree formation with line type and arrangement that used the combination of trees, shrubs, and groundcover plants with line and group types.
Keyword: 

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model