Judul: Analisis Daya Saing Ekspor Sarang Burung Walet Indonesia di Negara Tujuan Utama
Abstrak: Indonesia merupakan eksportir terbesar sarang burung walet dengan nilai total ekspor dunia sebesar US$ 364.2 juta diikuti oleh Malaysia sebesar US$ 135.2 juta dan Tiongkok sebesar US$ 82 juta pada tahun 2019 (UN Comtrade 2021). Tren perkembangan ekspor sarang burung walet Indonesia selama tahun 2010 sampai 2019 masih berfluktuatif walaupun cenderung meningkat (UN Comtrade 2021). Tujuan penelitian ini adalah: 1) Menganalisis daya saing komparatif sarang burung walet Indonesia di negara tujuan utama 2) Menganalisis daya saing kompetitif sarang burung walet Indonesia di negara tujuan utama. Metode yang digunakan dalam penelitian ini adalah Revealed Comparative Advantage (RCA) dan Export Product Dynamic (EPD). Periode yang digunakan dalam penelitian ini adalah tahun 2010 sampai 2019. Hasil analisis RCA menunjukkan bahwa sarang burung walet Indonesia memiliki keunggulan komparatif di lima negara tujuan. Hasil analisis EPD posisi pasar sarang burung walet Indonesia berada pada posisi lost opportunity di Tiongkok. Posisi falling star di Hongkong, Amerika Serikat dan Vietnam serta posisi retreat di Singapura., Indonesia is the largest exporter of bird nest’s with a total value of export the world US$ 364.2 million followed by Malaysia US$ 135.2 million and Tiongkok US$ 82 million in 2019 (UN Comtrade 2021). The trend of export development of Indonesian bird nest’s during 2010 to 2019 is still fluctuating although it tends to increase (UN Comtrade 2021). The objectives of this study are: 1) To analyze the competitiveness of comparative of Indonesian bird nest’s in the main destination countries 2) To analyze the competitiveness of competitive of Indonesian bird nest’s in main destination countries. This study uses Revealed Comparative Advantage (RCA) and Export Product Dynamic (EPD). The period used in this study is from 2010 to 2019. The results of the RCA analysis show that Indonesian bird nest’s have a comparative advantage in the five destination countries. The results of the EPD analysis of the position of the Indonesian bird nest’s market are in the Lost opportunity in Tiongkok. Falling star in Hongkong, United States and Vietnam and Retreat in Singapore.
Keyword: Export Product Dynamic (EPD), Revealed Comparative Advantage (RCA), Keunggulan, Komparatif, Kompetitif

Judul: Bird Trade Via E-commerce in Indonesia
Abstrak: Kemajuan teknologi mempermudah perdagangan satwa liar, termasuk burung. Penelitian ini mengidentifikasi jenis burung yang diperdagangkan, mengkategorikan produk yang dijual, kota dan kabupaten di Indonesia yang paling banyak menjual, serta menduga nilai ekonomi burung yang diperdagangkan secara daring melalui e-commerce. Pengumpulan data dilakukan selama 4 bulan melalui web scraping dengan mengumpulkan informasi seperti nama toko, barang yang dijual (perlengkapan, obat, awetan satwa, aksesoris, dan replika burung), asal, dan barang yang terjual. Berdasarkan hasil penelitian terdapat 411 jenis burung yang dijual dengan pembagian 211 jenis burung Indonesia dan 161 jenis burung asing di 32 daerah di Indonesia. Ordo Passeriformes menjadi jenis burung dominan dengan total penjualan 152 jenis burung endemik dan 69 jenis burung asing. Hasil analisis menunjukkan terdapat 47 jenis burung dilindungi oleh permen LHK No. 106 Tahun 2018, 32 jenis burung masuk kategori IUCN (8 VU, 16 EN, dan 8 CR), serta 66 jenis burung masuk status konservasi CITES (12 App. I, 49 App. II, dan 5 App. III). Total ekonomi yang didapatkan adalah Rp2.079.824.611 dari tahun 2015 hingga 2023., Technological advances make it easier to trade wild animals, including birds. This research identifies the types of birds traded, categorizes the products sold, the cities and districts in Indonesia that sell the most, and estimates the economic value of birds traded online through e-commerce. Data collection was carried out for 4 months via web scraping by collecting information such as shop name, goods sold (equipment, medicine, preserved animals, accessories, and bird replicas), origin, and goods sold. Based on the research results, there are 411 types of birds for sale, divided into 211 types of Indonesian birds and 161 types of foreign birds in 32 regions of Indonesia. The Passeriformes order is the dominant bird species, with total sales of 152 endemic bird species and 69 foreign bird species. The analysis results show that there are 47 bird species protected by LHK regulation no. 106 of 2018, 32 bird species are included in the IUCN category (8 VU, 16 EN, and 8 CR), and 66 bird species are included in CITES conservation status (12 App. I, 49 App. II, and 5 App. III). The total economic gain is IDR 2.079.824.611 from 2015 to 2023.
Keyword: burung, nilai ekonomi, perdagangan

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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