Judul: Analisis Manajemen Rantai Pasok Buah Manggis dengan Metode Analytic Network Process di PT Agung Mustika Selaras, Jawa Barat
Abstrak: Supply chain management (SCM) of mangosteen is generally different with supply chain management of manufacturing products because of the mangosteen rots very quickly, its availability is depend on the season, its various shape, size and voluminous also which is difficult to handle it. The high complexity of the supply chain network and the characteristics of the mangosteen make supply chain management of mangosteen are more vulnerable to the risk of losses that have not been able to provide profit improvements for stakeholder of the mangosteen supply chain. In order to solve various risk of mangosteen supply chain is needed supply chain risk management (SCRM) as one of efforts to build the robust supply chain management. The purpose of this research were ; (1) to identify activities of mangosteen SCM, (2) to identify source and kind of risks of mangosteen SCM, (3) to analyze the potential risks of mangosteen SCM losses, (4) to analyze alternative solutions and other risk factors to improve the ability of supply chain risk management (5) to design mangosteen SCRM for improving continuously. Methods used consist of descriptive qualitative method, to identify source of risk assessment and risk factors that affect on mangosteen supply chain management and using analytic network process method, to analyze the source and kind of risk factors that affect on increasing competency of SCRM. Data input were obtained from opinion of some experts in mangosteen supply chain through a questionnaire filling. There are three (3) experts that can be represented as experts in mangosteen supply chain management; they are Manager of KBU Al-Ihsan, Operational Manager of PT Agung Mustika Selaras and Head of Center for Tropical Fruit Studies, Bogor Agricultural University. The results of ANP assessment that the types of risk were the uncertainty of the price and demand in market risk as source risk and the type of risk of the uncertainty quality and weather as production risk. Results of the ANP to improve supply chain risk management obtained priority scale were operational key process (OKP), organizational performance factor (OPF), operational process cycle (OPC) and risk operational practices (ROP). In order to develop the robust SCM through the development of sustainable mangosteen SCRM, thus risk control was done by weakening and separating the risk to increase product management, supply management and information management which prioritized on procurement and production of the mangosteen.
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Judul: Strategy to Improve the Performance of the Export-Oriented Mango Agro-Industry Supply Chain During the Pandemic (Case Study: PT X Cirebon)
Abstrak: Kinerja rantai pasok mangga saat ini masih memiliki hambatan untuk orientasi ekspor. Tujuan penelitian ini adalah mengetahui mekanisme rantai pasok agroindustri mangga orientasi ekspor, mengukur kinerja rantai pasok mangga, dan perumusan alternatif strategi untuk meningkatkan kinerja ekspor. Mekanisme rantai pasok agroindustri mangga diidentifikasi dengan metode kualitatif. Penelitian ini dilakukan dengan metode Supply Chain Operations Reference (SCOR) untuk mengetahui kinerja rantai pasok mangga 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 3 hari, tidak terdapat penyimpanan mangga, dan biaya rantai pasok 22,31%. Hal tersebut menunjukkan bahwa kinerja rantai pasok agroindustri mangga orientasi ekspor cukup baik, hanya biaya rantai pasok yang belum efisien. Biaya tinggi disebabkan hambatan ekspor berupa kualitas mangga memiliki umur simpan yang pendek sehingga distribusi menggunakan airline yang memiliki biaya tinggi dibandingkan dengan kapal. Strategi peningkatan kinerja terpilih yaitu peningkatan kualitas yang dapat dilakukan dengan pembimbingan budidaya hingga panen oleh pemerintah dan perusahaan, serta peningkatan teknologi pasca panen mangga. Biaya tinggi dapat diatasi dengan peningkatan teknologi pasca panen sehingga mangga memiliki umur simpan yang lebih lama, serta biaya distribusi ekspor lebih rendah., The current performance of the mango supply chain had barriers to export orientation. The purpose of this study was to determine the supply chain mechanism for export-oriented mango agroindustry, measure the performance of the mango supply chain, and formulate alternative strategies to improve export performance. Mango agroindustry supply chain mechanism identified by the qualitative method. This research was conducted using the Supply Chain Operations Reference (SCOR) method to determine the supply chain performance of export-oriented mangoes and the Analytical Network Process (ANP) method to select alternative supply chain performance improvement strategies. The results of the supply chain performance measurement show that the reliability matrix has reached 100%, the flexibility and responsiveness matrix for 3 days, there was not mango storage, and the supply chain cost was 22.31%. This shows that the supply chain performance of the export-oriented mango agroindustry was quite good, only the supply chain costs were not yet efficient. The high cost was due to export barriers in the form of mango quality having a short shelf life so that distribution used airlines which have high costs compared to ships. The selected performance improvement strategy was quality improvement by improving mango post - harvest technology.
Keyword: analytical network process, export performance, supply chain, mango, supply chain operations reference

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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