Judul: Strategi Operasional untuk Meningkatkan Pendapatan Dan Nilai Tambah Usaha Dodol Buah Studi Kasus : Pd “X” Kabupaten Garut Jawa Barat
Abstrak: The purpose of this study is to assess overall operational development strategies of PD''X "in increasing incomes and value added fruit dodol. In particular, this study aims to: (1) study the income earned PD''X "in one bulk manufacturing, (2) study the amount of added value from the PD''X" and the amount of value-added contribution of business income, and distribution, (3) study the relationship between the use of production factors with the resulting production and (4) to formulate business development strategies fruit dodol. The results of the study showed that the income level of cash costs, the company earn the highest revenue from pineapple dodol types of Rp 33,698,406, - per year and for the level of income is the total cost of pineapple dodol Rp. 26,193,775, - with a value of R / C ratio of 1.12. The ratio of value added amounted pineapple dodol 20.15% in exchange for business owners and 66.60% 33.40% labor, dodo sirsak 18.46% registration in exchange for 63.53% of business owners and labor 36.47 %, while the ratio of value added melons dodol and strawberries are of 20.64% in exchange for business owners and 67.38% 32.62% labor. The use of all raw materials in the production process as a whole has a positive effect. This shows that all factors significantly affect the production process. Based on the analysis of marketing strategies that have been done using IE matrix, the position dodol product development of fruit marketing in quadrant II in the box described as the area grow and build. Strategies that can be done by the company based on weighted SWOT analysis, is as follows: (1) Maintaining a competitive product prices, 2) Opening distributor/new agents in strategic places, 3) Conducting an effective promotion and efficient, 4) Improve the performance marketing in analyzing market demand, 5) Develop and maintain product quality, 6) Expand and maintain market share was achieved, 7) Maintain the selling price in the market and 8) Improving distribution channels.
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Judul: Analisis Kinerja, Nilai Tambah, dan Risiko Rantai Pasok Agroindustri Dodol (Studi Kasus di PT Herlinah Cipta Pratama)
Abstrak: Dodol Picnic mengalami penurunan tingkat penjualan dodol pada masa pandemic. Menurunnya tingkat penjualan, berbanding lurus dengan menurunnya tingkat permintaan dodol dari konsumen. Hal itu merupakan permasalahan yang disebabkan karena pengelolaan rantai pasokan yang belum optimal. Oleh karena itu, perusahaan perlu menjaga dan meningkatkan kinerja rantai pasoknya. Penelitian ini bertujuan menganalisis struktur, kinerja, nilai tambah, dan risiko rantai pasok, serta merumuskan strategi peningkatan kinerja rantai pasok. Pengukuran kinerja menggunakan metode Supply Chain Operation Reference (SCOR) dengan model Analytical Hierarchy Process (AHP). Analisis perhitungan nilai tambah menggunakan model Hayami dan analisis risiko dengan metode House of Risk (HOR). Perumusan strategi peningkatan kinerja rantai pasok dengan metode Analytical Network Process (ANP) berdasarkan model Benefit, Opportunity, Cost, dan Risk (BOCR). Hasil pengukuran kinerja pada pengepul dan industri dodol diperoleh masing-masing 95,56% dan 88,76%. Analisis nilai tambah, didapatkan rasio nilai tambah dan keuntungan pengepul sebesar 0,3% dan 0,76%. Analisis risiko menghasilkan 8 risk event dan risk agent untuk pengepul, dan 21 risk event dan 18 risk agent untuk industri dodol. Terdapat masing-masing 5 dan 12 mitigasi risiko untuk pengepul dan industri dodol. Berdasarkan penilaian pakar, meningkatkan kualitas sumber daya manusia merupakan strategi peningkatan kinerja rantai pasok yang paling berpengaruh., Dodol Picnic experienced a decrease in sales during the pandemic. The decline in the level of sales is directly proportional to the decline in the level of product's demand from customers. This is a problem caused by inadequate supply chain management. Therefore, companies need to maintain and improve their supply chain performance. This research aims to analyze the structure, performance, value-added, risk, and formulating supply chain performance improvement. Performance measurement uses the Supply Chain Operation Reference (SCOR) method with the Analytical Hierarchy Process (AHP) model. The Hayami model analyzes added value calculation and risk analysis using the House of Risk (HOR) method. Formulation of supply chain performance improvement strategy using Analytical Network Process (ANP) method based on Benefit, Opportunity, Cost, and Risk (BOCR) model. The performance measurement results on the farmers and dodol industry were 95.56% and 88.76%, respectively. Value-added analysis obtained the added value ratio and farmer's profit rate of 0.003% and 0.0027%, respectively. The risk analysis resulted in eight risk events and risk agents for farmers, and 21 risk events, and 18 risk agents for the dodol industry. There are 5 and 12 risk mitigations for farmers and dodol industry, respectively. The priority of farmer's risk mitigation actions is that harvesting is done on time, while the dodol industry is looking for alternative vendors. Based on expert judgment, improving the quality of human resources is the most effective supply chain performance improvement strategy.
Keyword: dodol agroindustry, performance, risk, supply chain, value added

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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