Judul: Persepsi Mahasiswa Fakultas Kehutanan dan Lingkungan IPB: Pengaruh Pandemi Covid-19 pada Bisnis Kehutanan
Abstrak: Munculnya situasi pandemi yang datang secara tiba-tiba akibat virus Covid-19 memberikan dampak serius di Indonesia bahkan dunia. Penularan virus Covid-19 yang sangat cepat melalui udara, air dan sentuhan menyebabkan terganggunya mobilitas kerja masyarakat dan mengganggu pergerakan roda ekonomi. Salah satu sektor perekonomian yang terkena imbas pandemi Covid-19 adalah bisnis kehutanan. Tujuan penelitian ini adalah untuk mengidentifikasi pandangan kalangan mahasiswa kehutanan IPB mengenai arah bisnis kehutanan setelah pandemi Covid-19. Pandangan mahasiswa digali dengan kuesioner yang terbagi menjadi 5 bagian yaitu kinerja industri kehutanan Indonesia berdasar kategori bentuk/jenis komoditas, titik berat industri kehutanan Indonesia dari jenis kategori hulu vs. hilir, perlindungan bagi para pekerja kehutanan, strategi untuk mempertahankan/meningkatkan kinerja sektor kehutanan di tingkat global, dan pandangan personal terhadap masa depan., The emergence of a pandemic situation that came suddenly due to the Covid-19 virus had a serious impact on Indonesia and even the world. The rapid transmission of the Covid-19 virus through air, water, and touch has disrupted people's work mobility and disrupted the movement of the economy. One of the economic sectors affected by the Covid-19 pandemic is the forestry business. The purpose of this study was to identify the views of IPB forestry students regarding the direction of the forestry business after the presence of the Covid-19 pandemic. Student views were explored with a questionnaire which was divided into 5 parts, namely the performance of the Indonesian forestry industry based on the category of form/type of commodity, the focus of the Indonesian forestry industry on type upstream category vs. downstream, protection for forestry workers, strategies to maintain/improve the performance of the forestry sector at the global level, and a personal view of the future.
Keyword: Covid-19, kehutanan, persepsi

Judul: Persepsi Mahasiswa Fakultas Kehutanan Institut Pertanian Bogor untuk Berkiprah di Bidang Kehutanan
Abstrak: Increasing the role of educated human resource especially forestry is expected to overcome the problems of poverty and degradation of forest resources. According to data DPKHA IPB (2013), the percentage of Faculty of Forestry alumni who were graduate from 2009 to 2011, which work in forestry are 64.11% and only 2.8% who take part in developing entrepreneurship. This research aims to determine the tendency of students to take part in the Faculty of Forestry by working in government institutions, private companies, or entrepreneurship. Retrieval of data using questionnaires with respondents are students of the Faculty of Forestry IPB class of 2010 to 2012. Results showed 82% of students want to work in the forestry sector by choosing the government sector with the highest percentage of 65.26%; whereas, for the development of forestry entrepreneurs only chosen by 10.64% of respondents. The tendency of students to collaborate with forestry students, other agricultural and communities in the development of entrepreneurship is relatively high with percentage of requirement above 90%.
Keyword: human resources, collaboration, career preference

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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