Judul: Pengawasan Titik Masuk OPT dan OPTK di Balai Karantina Pertanian Kelas II Tanjung Pinang Kepulauan Riau
Abstrak: Tindakan perkarantinaan di Indonesia diatur oleh rumusan kebijakan pemerintah yang dituangkan dalam Undang Undang Nomor 21 Tahun 2019 tentang tindakan karantina 8P termasuk pemeriksaan, pengasingan, pengamatan, perlakuan, penahanan, penolakan, pemusnahan, dan pembebasan yang dilakukan hanya oleh Balai Karantina Pertanian. Tujuan penelitian ini untuk mendapatkan informasi data hama OPT dan OPT Karantina (OPTK) yang masuk melalui pelabuhan serta mempelajari manajemen pengawasan perkarantinaan tumbuhan di Balai Karantina Pertanian Kelas 2 Tanjung Pinang, Kepulauan Riau. Penelitian dilakukan melalui kegiatan magang dengan cara praktik langsung pada setiap kegiatan tindakan karantina, diikuti diskusi maupun wawancara dengan petugas karantina pertanian yang berkaitan dengan tugas pokok dan peran Balai Karantina Pertanian. Penentuan spesies OPT karantina dipelajari melalui identifikasi morfologi serangga hasil pengambilan sampel dari pelabuhan dengan menelusuri dan mengacu pada daftar hama karantina sesuai dengan Peraturan Menteri Pertanian Nomor 31/Permentan/KR.010/7/2018. Empat spesies serangga gudang telah teridentifikasi pada sampel bahan yang masuk melewati pelabuhan, yaitu Necrobia rufipes, Oryzaephilus surinamensis, Sitophilus oryzae, dan Tribolium castaneum. Keempat spesies hama gudang ini bukan termasuk OPTK.
Keyword: identification, quarantine action, quarantine in law, storage product insect

Judul: Management of plant pests in the Balai Karantina Pertanian Kelas I Pekanbaru, Riau
Abstrak: Organisme Pengganggu Tumbuhan yang terbawa media pembawa dapat menimbulkan masalah di wilayah baru jika tidak dikelola dengan baik. Berdasarkan Undang Undang nomor 21 tahun 2019, pemerintah RI melalui Badan Karantina Pertanian berwenang melakukan tindakan karantina untuk mencegah masuknya OPT baru ke wilayah Indonesia. Tindakan karantina meliputi pemeriksaan, pengasingan, pengamatan, perlakuan, penahanan, penolakan, pemusnahan dan pembebasan (8 P). Tujuan khusus dari penelitian ini adalah mempelajari secara langsung manajemen tindakan karantina di Balai Karantina Pertanian Kelas I Pekanbaru, Riau. Kegiatan dilakukan dengan melakukan praktik langsung pada setiap kegiatan tindakan karantina, dan diskusi maupun wawancara dengan petugas karantina pertanian yang bertugas. Data tindakan karantina terkait kegiatan impor, ekspor, antar wilayah, pengujian sampel, penahanan, penolakan dan pemusnahan diperoleh dari tahun 2017 hingga 2021. Jenis komoditas ekspor melalui Balai Karantina Pertanian Kelas I Pekanbaru ada 76 komoditas dengan kisaran volume 900.000 hingga 3.000.000 ton/tahun. Jenis komoditas impor ada 34 komoditas dengan kisaran volume 70.000 hingga 130.000 ton/tahun. Komoditas antar wilayah ada 47 komoditas dengan kisaran volume 1000 hingga 12.000 ton/tahun. Selama kurun waktu 2017 hingga 2021 ada 3 tindakan karantina, yaitu penahanan, penolakan, dan pemusnahan., Plant pests carried by carrier media can cause problems in new areas if not managed properly. Based on law number 21 of 2019, the Indonesian government through the agricultural quarantine agency has the authority to take quarantine measures to prevent the entry of new pests into Indonesian territory. Quarantine measures include inspection, exile, observation, treatment, detention, rejection, destruction and release (8 P). The specific purpose of this research is a direct action management at Balai Karantina Pertanian Kelas I Pekanbaru, Riau. Activities were carried out by conducting the direct practice in each quarantine action activity and discussions and interviews with agricultural quarantine officers on duty. Quarantine action data related to import, export, domestic, sample testing, detention, rejection and destruction were obtained from 2017 to 2021. Types of export commodities through the Balai Karantina Pertanian Kelas I Pekanbaru were 76 commodities with a volume range of 900.000 to 3.000.000 tons/year. There were 34 imported commodities with a volume range of 70.000 to 130.000 tons/year. There were 47 commodities transported between regions with a volume range of 1000 to 12.000 tons/year. During 2017 to 2021, there were 3 quarantine measures, namely detention, rejection, and destruction.
Keyword: export, import, quarantine actions

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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