Judul: Dampak Ekonomi Kegiatan Pertambangan Bahan Galian Golongan C Di Desa Cipinang Kecamatan Rumpin Kabupaten Bogor
Abstrak: Desa Cipinang, Kecamatan Rumpin, Kabupaten Bogor merupakan salah satu lokasi pertambangan Galian C yang sudah beroperasi sejak tahun 1990-an. Adanya aktivitas pertambangan di Desa Cipinang memberikan dampak positif yaitu penyerapan tenaga kerja lokal dan timbulnya multiplier effect yang berimplikasi meningkatnya pendapatan masyarakat. Namun, kegiatan pertambangan tersebut juga berdampak negatif karena menghasilkan eksternalitas negatif yang ditimbulkan seperti menurunnya kualitas udara akibat debu. Hal ini menyebabkan turunnya kualitas kesehatan masyarakat sehingga menambah pengeluaran untuk biaya kesehatan dan biaya waktu karena sakit. Tujuan penelitian ini yaitu mengidentifikasi persepsi masyarakat terhadap aktivitas pertambangan di Desa Cipinang, menganalisis dampak ekonomi dan dampak negatif yang terjadi akibat aktivitas pertambangan di Desa Cipinang. Metode yang digunakan yaitu skala likert, benefit transfer, dampak ekonomi lokal, multiplier effect, loss of earnings dan cost of illness. Hasil penelitian menunjukkan bahwa secara keseluruhan masyarakat di Desa Cipinang menilai setuju dengan adanya aktivitas pertambangan terutama pada aspek sosial dan ekonomi, namun pada aspek lingkungan masyarakat menilai tidak setuju. Dampak ekonomi yang dirasakan oleh masyarakat Desa Cipinang sebesar Rp 338.803.143.936/tahun dengan dampak yang terbesar yaitu dampak lanjutan sebesar 64%, selanjutnya dampak langsung sebesar 34% dan dampak tidak langsung sebesar 2%. Dengan begitu, multiplier effect yang didapat dalam penelitian ini yaitu sebesar 2,8 yang artinya aktivitas pertambangan memberikan dampak positif bagi perekonomian masyarakat. Kerugian ekonomi yang dirasakan oleh masyarakat Desa Cipinang sebesar Rp 628.243.090/tahun dengan nilai kerugian dirasakan dari biaya berobat sebesar 83% lalu kehilangan pendapatan 17%.
Keyword: cost of illness, dampak, galian golongan c, persepsi, pertambangan

Judul: Dampak aktivitas pertambangan bahan galian golongan c terhadap kondisi kehidupan masyarakat desa (analisis sosio-ekonomi dan sosio-ekologi masyarakat Desa Cipinang, Kecamatan Rumpin, Kabupaten Bogor, Jawa Barat)
Abstrak: Mining activities is a natural resource mining dredging activities of contained in the soil. This mining activities in its implementation will give positive and negative impact on sosio-economic and sosio-ecological aspect for the local community. The purpose of this study is 1) to explain the sosio-economic impacts of mining activities and 2) to explain the sosio-ecological impacts of mining activities. This research metode uses a quantitative approach supported by the use of qualitative approach. Primary data obtained from the interviews and questionnaires, while secondary data obtained from the documentation and study of literature. The data generated using of cross tabulation and frequency tables and descriptive analysis. The selection of respondents using of cluster sampling techniques to select two different village is Kampung Joglo and Kampung Gunung Cabe. The choice of location is based on mining the large number of industrial plants to see an impact on the agricultural sector. The result of this research showed that in general, in Kampung Joglo and Kampung Gunung Cabe, mining activities gives a negative impacts on socio-economic and sosio-ecological aspects. On sosio-economic aspect are seen in the declining level of the employment in agriculture due to the limited area of agricultural land owned by the local community. Meanwhile, the level of non-agricultural employment opportunities have increased in line with the opening of employment opportunities in the mining sector. The occurens conflicts between local communities with the company caused by the changes of environmental conditions. On sosio-ecological aspect is the occurens changes of the air, a disturbance on the condition of water resources, noise pollution is caused by blasting activities and mineral transport trucks. In addition, still many community members who suffers from respiratory tract such as shortness of breath, caugh, colds and diarrhea.
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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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