Judul: Evaluasi kualitas produk dengan metode peta pengendalian di PT. Aspex Paper, Cileungsi Bogor
Abstrak: Banyak permasalahan yang dihadapi oleh industri pulp dan kertas, mulai dari bahan baku sampai dengan proses, masalah lingkungan, efisiensi serta penghematan energi; yang kesemuanya itu harus dicari pemecahannya. Salah satu masalah yang sering timbul adalah masalah yang berkaitan dengan kualitas produk. Masalah ini acap kali menyebabkan produk yang dihasilkan kalah bersaing dengan produk seje- nis dari pabrik lain. Dengan demikian pembinaan kearah kualitas merupakan suatu keharusan. Untuk memecahkan masalah yang dihadapi, khususnya pada aspek kualitas perlu diusahakan agar produk yang dihasilkan memiliki keseraga- man yang tinggi dan sesuai dengan spesifikasi yang berla- ku. Oleh karena itu metode pengendalian kualitas secara terpadu perlu diterapkan agar kualitas yang dihasilkan dapat ditingkatkan. cipta mile Sehubungan dengan hal tersebut, suatu penelitian telah dilakukan untuk mengetahui kualitas pulp dan kertas yang dihasilkan, sejauh mana keragaman yang timbul serta menge- tahui faktor-faktor yang mempengaruhi keragaman tersebut. Diharapkan hasil penelitian ini dapat memberikan input yang berharga kepada PT. Aspex Paper, Cileungsi, Bogor...
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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