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"Zeolit alam adalah mineral yang memiliki sifat khas dan struktur rongga yang teratur dalam ukuran tertentu, sehingga berpotensi sebagai adsorben limbah amonia. Kapasitas adsorpsi dan selektivitgasnya dapat ditingkatkan degnan modifikasi zeolit alam melalui proses pertukaran ion menjadi H-Zeolit yang memiliki inti aktif H.Penelitian ini menggunakan zeolit alam yang berada dari Lampung yang mengandung klinoptilolit sekitar 75%. kapasitas adsi=orpsi Zeolit alam Lampung (ZAL) diperbandingkan dengan tiga jenis H-Zeolit yang dihasilkan dari proses pertukaran ion antara ZAL dengan NH4NO3 dan (NH4) SO4 dan kemudian dikalsinasi pada suhu 550 C. Adsorpsi dilakukan secara batch pada suhu dan tekanan kamar dengan variasi waktu dan konsentrasi awal amonia. Dilakukan pula percobaan regenarasi terhadap zeolit yang telah jenuh dengan NH3, dengan jalan pemanasan pada suhu 550 C selama 1 jam dan selamanya digunakan kembali untuk adsorpsi. Sebagai tahap awal adsorpsi regenerasi dilakukan sebanyak dua setengah siklus.Hasil penelitian ini menunjukkan bahwa dari segi kapasistas adsorpsi dalam pemakaian siklus adsorpsi regenerasi, H-zeolit lebih baik dari pada zeolit alam setelah regeneraasai zeolit alam mengamalami penurunan kapasista adsorps yang cukup besar. Secara umum H Zeolit yang diperoleh dari aktivasi dengan amonium nitrat merupakan zeolit yang paling baik jika digunakan sebagai adsorben amonia. Perlu dilakukan percobaan lebih lanjut menggunakan air limbah atau limbah tiruan untuk mengetahui kapasitas adsorpsi maupun selektivitasnya dengan siklus adsorpsi yang lebih panjang."

"This versatile book teaches control system design using H∞infty techniques that are simple and compatible with classical control, yet powerful enough to quickly allow the solution of physically meaningful problems. The authors begin by teaching how to formulate control system design problems as mathematical optimization problems and then discuss the theory and numerics for these optimization problems. Their approach is simple and direct, and since the book is modular, the parts on theory can be read independently of the design parts and vice versa, allowing readers to enjoy the book on many levels.The development of H∞infty engineering was one of the main accomplishments of control in the 1980s. However, until now, there has not been a publication suitable for teaching the topic at the undergraduate level. This book fills that gap by teaching control system design using H∞infty techniques at a level within reach of the typical engineering and mathematics student. It also contains a readable account of recent developments and mathematical connections.The authors treat control design problems in a physically correct way. They present a small set of specific rules that the reader can apply to convert a particular design problem to the fundamental optimization problem of H∞infty control. This precisely formulated mathematics problem can then be solved on a computer. The book introduces the control software package OPTDesign, which allows the reader to easily reproduce the calculations done in the solved examples and even try variations on them. The description of how to convert an engineering problem to a form suitable for CAD is simpler than in other books."

"One of the main accomplishments of control in the 1980s was the development of H∞ techniques. This book teaches control system design using H∞ methods. Students will find this book easy to use because it is conceptually simple. They will find it useful because of the widespread appeal of classical frequency domain methods.Classical control has always been presented as trial and error applied to specific cases; Helton and Merino provide a much more precise approach. This has the tremendous advantage of converting an engineering problem to one that can be put directly into a mathematical optimization package.After completing this course, students will be familiar with how engineering specs are coded as precise mathematical constraints."

"This monograph presents a unified mathematical framework for a wide range of problems in estimation and control. The authors discuss the two most commonly used methodologies: the stochastic H2 approach and the deterministic (worst-case) H� approach. Despite the fundamental differences in the philosophies of these two approaches, the authors have discovered that, if indefinite metric spaces are considered, they can be treated in the same way and are essentially the same."

"Dyspepsia is one of numerous general complaints, which is commonly encountered by doctors of various disciplines. In daily practice, the complaint is not only limited for gastroenterologists. Knowledge on pathophysiology of dyspepsia have been developing continuously since a scientific investigation has been started in 1980s, which considers Helicobacter pylori as one of key factor in managing dyspepsia, either it is associated with ulcer or non-ulcer. The management of dyspepsia cannot be separated from the management of H. pylori and there is an additional new knowledge associated with definition, pathophysiology, diagnosis and treatment of both dyspepsia and H. pylori infection.

This consensus document on the management of dyspepsia and H. pylori infection in Indonesia has been developed using the evidence-based medicine principles; therefore, it can be used as a reference for doctors in dealing with dyspepsia and H. pylori infection cases in their daily practice. It is expected that with the new consensus, doctors can provide greater service to their patients who have dyspepsia and H. pylori infection."