Judul: Strategi Pengembangan Usaha Keripik Cek Sam pada Era New Normal dengan Pendekatan Business Model Canvas
Abstrak: Usaha Keripik Cek Sam merupakan industri pengolahan keripik bidang pertanian di Saree, Aceh Besar. Adanya pandemi Covid-19 menyebabkan penurunan pendapatan usaha, perubahan perilaku konsumen dan kebijakan protokol kesehatan sehingga membuat kegiatan operasional usaha Keripik Cek Sam berubah. Penelitian ini bertujuan untuk: (1) Mengidentifikasi profil usaha dan memetakan usaha Keripik Cek Sam ke dalam Business Model Canvas (BMC). (2) Menganalisis potensi dan prospek pengembangan usaha Keripik Cek Sam pada era new normal. (3) Menyusun strategi pengembangan usaha Keripik Cek Sam dalam bentuk BMC. Metode yang digunakan adalah metode BMC. Hasil strategi pengembangan usaha Keripik Cek Sam dalam bentuk BMC menunjukkan bahwa adanya proposisi nilai baru untuk meningkatkan hubungan baik dengan pelanggan yaitu jaminan kualitas dan kehalalan, jaminan higienis dan sanitasi, inovasi produk yang menyehatkan, dan penggunaan layanan online sebagai saluran baru. Hal tersebut mempengaruhi aktivitas kunci dan sumber daya utama pada usaha Keripik Cek Sam. Selain itu, usaha perlu menjalin kemitraan dengan petani, jasa ekspedisi, dan marketplace untuk memperluas segmentasi pelanggan. Penerapan strategi pengembangan yang baru pada usaha Keripik Cek Sam dapat meningkatkan biaya investasi sebesar Rp63.439.000 dan biaya operasional sebesar Rp1.394.817.300 per tahun, serta meningkatkan pendapatan sebesar Rp2.705.192.000., Keripik Cek Sam business is an agricultural chip processing industry in Saree, Aceh Besar. The existence of the Covid-19 pandemic caused a decrease in business income, changes in consumer behavior and health protocol policies that made Keripik Cek Sam business operations change. The research aims to: (1) Identify business profiles and map Keripik Cek Sam business into Business Model Canvas (BMC). (2) Analyze the potential and prospects of Keripik Cek Sam business development in the new normal era. (3) Develop a Keripik Cek Sam business development strategy in the form of BMC. The method used is the BMC method. The results of Keripik Cek Sam business development strategy in the form of BMC show that there is a new value proposition to improve good relationships with customers, namely quality and halal assurance, hygienic and sanitary guarantees, healthy product innovation, and the use of online services as new channels. This affects key activities and key resources in Keripik Cek Sam business. In addition, businesses need to establish partnerships with farmers, expedition services, and marketplaces to expand customer segmentation. The implementation of the new development strategy in Keripik Cek Sam business can increase investment costs by Rp63.439.000 and operating costs by Rp1.394.817.300 per year and increase revenue by Rp2.705.192.000.
Keyword: BMC, covid-19, new normal, potential, prospect

Judul: Business Development Strategy of SwiTa through Designing Business Model Canvas (BMC) During Covid-19 Pandemic
Abstrak: Permasalahan ekonomi saat ini sangat terlihat dari salah satu penggerak perekonomian Indonesia yaitu UMKM yang menunjukan bahwa UMK dan UMB berhenti beroperasi saat pandemi pada bulan Maret hingga Juli 2020 sebelum diberlakukannya New Normal. Salah satu UMKM yang masih menjalankan produksi di tengah pandemi adalah SwiTa yang fokus pada bidang fashion dengan produk utamanya yaitu sweater. Namun bisnis tidak lepas dari kelemahan, kendala, serta tantangan. Oleh karena itu, diperlukan model bisnis yang menjadi strategi untuk meningkatkan pengembangan bisnis tersebut. Tujuan penelitian ini untuk : (1) Mengidentifikasi kondisi bisnis yang sedang dijalani oleh SwiTa dengan pendekatan Business Model Canvas (BMC), (2) Menganalisis kekuatan, kelemahan, peluang, dan ancaman (SWOT) dari setiap elemen BMC yang ada pada SwiTa, (3) Merumuskan Strategi pengembangan bisnis yang perlu dijalankan oleh SwiTa berdasarkan hasil analisis SWOT dari setiap elemen BMC SwiTa. Metode penelitian menggunakan Business Model Canvas (BMC) dan analisis SWOT. Hasil penelitian ini dapat ditarik kesimpulan bahwa SwiTa perlu menambahkan beberapa solusi pada elemen BMC yaitu Key Partner, Key Activities, Value Proposition, Customer Relationship, Channels, dan penyesuaian penambahan di beberapa aspek dengan mengatur Cost Structure kembali., Economic problems now reflected from Small and Medium Enterprises (MSME), which shows that MSEs and UMBs stopped operating during the pandemic in March to July 2020 before the New Normal was enacted. SwiTa is one of the MSME can still running production during the pandemic, that presents products in the fashion sector with sweater as the main product. However, running business will face with obstacle, weakness, and challenge. Because of that, strategy model needed in improving business development. The purpose of this research is: (1) Identificate SwiTa business condition with Business model canvas (BMC) approach, (2) Analyze strength, weakness, opportunities and threat (SWOT) in each BMC element of SwiTa, (3) Formulize a business development strategy that needs to be carried out by SwiTa based on the results of the SWOT analysis of each element of the SwiTa BMC. The research method uses the Business Model Canvas (BMC) and SWOT analysis. The results of this research can be concluded that SwiTa needs to add several solutions to the BMC elements, namely Key Partners, Key Activities, Value Propositions, Customer Relationships, Channels, and additional adjustments in several aspects by rearranging the Cost Structure.
Keyword: SWOT, BMC, covid-19, swita

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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