Judul: Strategi Peningkatan Kinerja Rantai Pasok Agroindustri Salak Berorientasi Ekspor Di Masa Pandemi (Studi Kasus: PT X Jakarta).
Abstrak: Kinerja rantai pasok salak saat ini masih memiliki hambatan untuk orientasi ekspor. Tujuan penelitian ini adalah mengetahui mekanisme rantai pasok agroindustri salak orientasi ekspor, mengukur kinerja rantai pasok salak, dan perumusan alternatif strategi untuk meningkatkan kinerja ekspor. Mekanisme rantai pasok agroindustri salak diidentifikasi dengan metode kualitatif. Penelitian ini dilakukan dengan metode SCOR untuk mengetahui kinerja rantai pasok salak orientasi ekspor dan metode analytical network process (ANP) untuk pemilihan alternatif strategi peningkatan kinerja rantai pasok. Hasil pengukuran kinerja rantai pasok menunjukkan matriks reliabilitas telah mencapai 100%, matriks fleksibilitas dan responsivitas selama 2 hari, tidak terdapat penyimpanan salak, dan matriks biaya rantai pasok adalah 37,22%. Hal tersebut menunjukkan bahwa kinerja rantai pasok agroindustri salak orientasi ekspor cukup baik, hanya biaya rantai pasok yang masih tinggi. Biaya tinggi disebabkan hambatan ekspor berupa kualitas salak yang memiliki umur simpan yang pendek sehingga distribusi menggunakan pesawat yang memiliki biaya tinggi dibandingkan dengan kapal. Strategi peningkatan kinerja terpilih yaitu peningkatan kualitas yang dapat dilakukan dengan pembimbingan budidaya hingga panen buah salak oleh pemerintah dan perusahaan, serta peningkatan teknologi pasca panen buah salak. Biaya yang tinggi dapat diatasi dengan peningkatan teknologi pasca panen sehingga salak memiliki umur simpan yang lebih lama, serta biaya distribusi ekspor lebih rendah., The current performance of the snake fruit supply chain still have obstacles that occur for export orientation. The purpose of this study was to determine the supply chain mechanism of export-oriented snake fruit agroindustry, measurement of snake fruit supply chain performance, and formulate alternative strategies to improve export performance. The supply chain mechanism for snake fruit agroindustry was identified by qualitative methods. This research was conducted using the SCOR method to determine the performance of the export- oriented snake fruit supply chain and the analytical network process (ANP) method for selecting alternative strategies to improve supply chain performance. The results of the supply chain performance measurement show that the reliability performance matrix has reached 100%, the flexibility and responsiveness performance matrix for 2 days, and 37,22% supply chain costs. This shows that the performance of the export-oriented snake fruit agro- industry supply chain is quite good, only the supply chain costs are still high. Supply chain costs are still high due to export barriers in the form of snake fruit quality having a short shelf life so that distribution use airplane which have high costs compared to ships. The selected performance improvement strategy is quality improvement that can be done by guiding the cultivation to harvesting snake fruit by the government and companies, as well as improving post-harvest technology for snake fruit. High costs can be overcome by improving post- harvest technology so that snake fruit have a longer shelf life and lower export distribution costs.
Keyword: ANP, export performance, supply chain, snake fruit (salaca zalacca), SCOR

Judul: Design of Supply Chain Performance Measurement Model for Blue Swimming Crab Industry at PT Kelola Mina Laut Cikande
Abstrak: Penelitian ini bertujuan untuk merancang model pengukuran kinerja rantai pasok industri rajungan kaleng di PT Kelola Mina Laut (KML) Cikande. Penelitian ini menjawab empat pertanyaan utama: mekanisme rantai pasok produk rajungan kaleng di PT KML Cikande, metode pengukuran kinerjanya, aspek yang perlu ditingkatkan, dan rancangan model pengukuran kinerja rantai pasok. studi ini mengidentifikasi dan menganalisis proses serta kinerja rantai pasok Menggunakan Supply Chain Operation Reference Digital Standard (SCOR-DS) v14.0 dan Analytical Hierarchy Process (AHP). Struktur jaringan rantai pasok mencakup supplier, miniplant, plant, distributor, retail, horeka, dan end customer. Analisis kinerja menggunakan model SCOR-DS dan metode AHP menunjukkan bahwa nilai kinerja miniplant adalah 90,24%, sementara plant adalah 81,81%. Miniplant perlu meningkatkan kinerja supply chain lead time dan tingkat rendemen, sedangkan plant perlu meningkatkan supply chain lead time, tingkat rendemen, order fulfillment cycle time, supply chain flexibility, dan cash-to-cash cycle time. Model pengukuran berbasis Google Spreadsheet dirancang untuk memungkinkan perusahaan mengevaluasi kinerja rantai pasok secara berkala berdasarkan model SCOR-DS dan AHP. Penelitian ini menyimpulkan bahwa aspek rantai pasok yang perlu ditingkatkan berkaitan dengan produktivitas dan waktu siklus pemesanan, serta menyarankan strategi yang ditargetkan untuk peningkatan berkelanjutan di area tersebut. Strategi perbaikan kinerja yang dirumuskan diproyeksikan akan meningkatkan kinerja miniplant menjadi 96,97% dan kinerja plant menjadi 91,46%., This study aims to design a performance measurement model for the canned crab industry supply chain at PT Kelola Mina Laut (KML) Cikande. The research addresses four main questions: the mechanism of the canned crab product supply chain at PT KML Cikande, its performance measurement method, the aspects that need improvement, and the design of the supply chain performance measurement model. The study identifies and analyzes the supply chain processes and performance using the Supply Chain Operation Reference Digital Standard (SCOR-DS) v14.0 and the Analytical Hierarchy Process (AHP). The supply chain network structure includes suppliers, miniplants, plants, distributors, retailers, Horeca, and end customers. Performance analysis using the SCOR-DS model and AHP method indicates that the performance score of the miniplant is 90.24%, while the plant is 81.81%. The miniplant needs to improve its supply chain lead time and yield rate, while the plant needs to enhance its supply chain lead time, yield rate, order fulfillment cycle time, supply chain flexibility, and cash-to-cash cycle time. A Google Spreadsheet-based measurement model is designed to enable the company to periodically evaluate logistic performance based on the SCOR-DS and AHP models. The study concludes that the supply chain aspects that need improvement are related to productivity and order cycle time, and suggests targeted strategies for continuous improvement in these areas. The formulated performance improvement strategies are projected to increase the miniplant's performance to 96.97% and the plant's performance to 91.46%.
Keyword: AHP, Kinerja, rantai pasok, produk rajungan, SCOR-DS

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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