Judul: Analysis of Factors Influencing Garlic Farmers Applying Micro Credit for People's Business (Case Study: Sembalun District, East Lombok Regency)
Abstrak: Kecamatan Sembalun merupakan salah satu sentra produksi bawang putih di Indonesia. Bawang putih merupakan komoditas penting sebagai sumber pendapatan petani. Petani di Kecamatan Sembalun menghadapi harga pembelian bawang putih di tingkat petani yang rendah. Hal tersebut berdampak terhadap pendapatan serta ketersediaan modal untuk menjalankan usahatani bawang putih pada musim tanam selanjutnya. Sebagian petani menggunakan Kredit Usaha Rakyat (KUR) Mikro sebagai tambahan modal usahatani bawang putih. Berdasarkan hal tersebut penelitian ini bertujuan untuk: (1) menganalisis pendapatan petani bawang putih KUR Mikro dan petani non KUR Mikro, (2) mengidentifikasi mekanisme penyaluran KUR Mikro kepada petani bawang putih, (3) menganalisis faktor-faktor yang memengaruhi keputusan petani bawang putih menggunakan KUR Mikro. Penelitian ini menggunakan metode analisis pendapatan dan R/C ratio, analisis deskriptif, serta analisis regresi logistik biner. Hasil penelitian menunjukkan R/C ratio bernilai lebih dari satu bagi petani KUR Mikro maupun petani non KUR Mikro artinya usahatani bawang putih menguntungkan. Terdapat dua tahapan yang perlu dilalui calon nasabah untuk dapat mengajukan permohonan KUR Mikro yaitu pemenuhan kelengkapan berkas dan pengajuan berkas permohonan KUR Mikro. Hasil analisis menunjukkan faktor-faktor yang berpengaruh signifikan terhadap keputusan petani bawang putih menggunakan KUR Mikro adalah usia, luas lahan, lama usahatani, pendapatan, frekuensi KUR Mikro dan keikutsertaan kelompok tani., Sembalun district is one of the garlic production centers in Indonesia. Garlic is an important commodity as source of income for farmers. Farmers in Sembalun face low garlic purchase prices. This has an impact on income and the availability of capital for farming on next season. Some farmers use Kredit Usaha Rakyat (KUR) Mikro as additional farming capital. Based on that explanation this study aims to: (1) analyze the income of garlic farmers who use KUR Mikro and farmers who do not use it, (2) identify lending mechanisms of KUR Mikro for garlic farmers, (3) analyze the factors influencing garlic farmers decisions using KUR Mikro. This study used income analysis method, R/C ratio, descriptive analysis method, and binary logistic regression analysis method. The results of the analysis show that R/C ratio is more than one for both farmers who used KUR Mikro and farmers who do not use, which means garlic farming business is profitable. There are two stages that need to be passed by prospective customers to be able to apply KUR Mikro that are completing files and submitting KUR Mikro application files. Results of the analysis show that the factors that have significant influence on the garlic farmer’s decisions to use KUR Mikro are age, farm area, farming experience, income, using KUR Mikro frequence, and farmers groups.
Keyword: binary logistic regression, income analysis, micro credit mechanism, R/C ratio

Judul: Peran Kelompok Tani terhadap Pendapatan Usahatani Bawang Putih di Tiga Sentra Produksi di Indonesia
Abstrak: Dalam upaya mewujudkan swasembada bawang putih, pemerintah telah melakukan upaya berupa pemberian input produksi dan pembentukan kelompok tani. Namun, petani cenderung melakukan usahatani secara individu sehingga program-program yang dibuat belum tersalurkan secara merata dan menyebabkan perbedaan biaya produksi dan pendapatan antara petani anggota dan bukan anggota kelompok tani. Oleh karena itu, penelitian ini bertujuan untuk menganalisis peran keanggotaan kelompok tani terhadap pendapatan usahatani bawang putih. Data yang digunakan adalah data sekunder dari Sensus Pertanian 2013 yaitu data Survei Rumah Tangga Usaha Tanaman Hortikultura tahun 2014. Pengolahan data dilakukan secara kualitatif dan kuantitatif. Analisis data kualitatif dengan metode deskriptif dan kuantitatif dengan analisis pendapatan serta Propensity Score Matching. Hasil penelitian menunjukkan bahwa kelompok tani belum mampu berperan positif terhadap pendapatan usahatani bawang putih. Rata-rata pendapatan, penerimaan, produktivitas, serta biaya total per tahun per hektar yang diperoleh petani anggota kelompok tani masih lebih rendah dibandingkan petani yang bukan anggota kelompok tani. Hal tersebut mengindikasikan bahwa fungsi kelompok tani belum berjalan sepenuhnya secara optimal., In order to be self-sufficient in garlic production, the government provides programs such as input subsidies and develop farmer groups. However, farmers tend to do farming individually so that assistance in efforts to be self-sufficient has not been distributed evenly, which will lead to differences in production costs and income between farmer members and non-members of farmer groups. Therefore, this study aims to analyze the impact of farmer group membership on garlic farm income. The data used is secondary data from the 2013 Agricultural Census, namely the 2014 Horticultural Plant Household Survey data. Data processing was carried out qualitatively and quantitatively. Qualitative data analysis with descriptive and quantitative methods with income analysis and Propensity Score Matching. The result shows that farmer group has not capable yet to increase garlic farming income. The average of total income, productivity level, as well as total cost per year per hectare obtained by farmers who are members of farmer groups is lesser than farmers who are not members of farmer group. Hence, it indicates that the function of farmer group is not running optimally yet as it should.
Keyword: farmer group, garlic, farm income, propensity score matching

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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