Judul: Proses Produksi dan Pengendalian Kualitas Kertas PPC 80 g/m di PT. Pindo Deli Pulp and Paper Mills, Karawang - Jawa Barat
Abstrak: Perkembagan industri kertas Indonesia akan terus meningkat, persaingan antar produsen kertas akan semakin ketat sehingga perusahaan akan saling berusaha meningkatkan kualitas kertas yang dihasilkan agar tetap diterima di pasaran luas. Selain dari itu ketersediaan bahan baku yang lancar dan memenuhi kualitas yang baik merupakan syarat untuk kelangsungan proses produksi. Dapat dipastikan suatu saat kelangkaan bahan baku akan dialami oleh setiap produsen kertas, oleh karena itu setiap perusahaan akan di tuntut untuk dapat mengoptimalkan penggunaan bahan baku secara baik dan efisien serta memastikan proses produksi tetap terkendali sehingga dapat diterima secara has. Salah satu cara untuk mencegah pengunaan bahan baku secara tidak efisien yaitu dengan mengadakan pengendalian produk yang dihasilkan dan mengontrol proses produksi melalui peta pengawasan.
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Judul: Pengendalian Kualitas Pada Proses Produksi Kertas Medium di PT Indah Kiat Pulp & Paper, Serang Mill
Abstrak: Paper with several sizes plays an important role in human life especially in modern society. Now paper becomes one of human needs and is used in various cases. With times, the paper consumption surely increases because of paper characteristics easily used, practical, light, cheap and can be recycled. Based on rising need of paper, it is a challenge for thefact01Y to increase the quality, capacity, and technology in the paper production. Qualified product is affected by production level through monitoring for each level of the production process. Quality management can be used for quality control, so that it can minimize product damage. The research was conducted at PT Indah Kiat Pulp and Pap~r, Serang mill (PT IKP P). The objective of the research is to identifY level factors of production process that influence final product quality, to analyze pelformance of production process, and main parameter of product quality by using quality management technique namely cause and effect diagram and control chart, identifYing the process instability systems and analyzing the correction process by using information ji-om observation, literature study and expert opinion in the research plant.
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Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model