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"The paper discussed about the neural network models at nonlinear autoregressive process which is applied in the composite stock price index data at Surabaya stock exchange. ...."

"Persamaan modus terkopel yang berhubungan dengan "intensity dependent refractive index (MI)" yang merupakan efek dari medium optik nonlinear adalah dasar dari perambatan berkas dalam konfigurasi simetris dari lima lapisan film tipis yang berbentuk planar, dengan dua pandu gelombang yang terkopel merupakan bahan nonlinear dengan indeks bias yang sama. Dua lapisan yang lain yaitu selubung dan substrat merupakan bahan linear dan mempunyai indeks bias yang berbeda. Basil simulasi menunjukkan bahwa untuk pandu gelombang simetris dengan panjang kopling dapat bekerja sebagai saldar optik dan pembagi daya 3 dB secara sempurna, bergantung terhadap koefisien kopling linear, perubahan daya masukan dan tebal pandu gelombang"

"In this paper , a dynamic model of the container crane which represents simultaneous traversing and hoisting motions is discussed.. The model is derived using lagrangian modeling techniques

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"Perilaku pasca elastik struktur jembatan akibat beban siklik gempa dapat ditunjukkan dengan melakukan analisa riwayat waktu nonlinear. Desain struktur berbasis kinerja (performance based design) diawali dengan pembentukan sendi plastis pada elemen nonlinear jembatan yang tergambar pada kurva momenrotasinya. Definisi potensi sendi plastis dinyatakan dengan penentuan panjang sendi plastis (lp) dan diskritisasi fiber section pada elemen nonlinear struktur (pilar jembatan). Penelitian ini bertujuan untuk melakukan studi parametrik panjang sendi plastis, bentuk penampang pilar, serta pemodelan pondasi terhadap kinerja struktur yang dihasilkan. Disamping itu juga dilakukan tinjauan sensitifitas spektrum gempa terhadap pembentukan sendi plastis. Penelitian ini diawali dengan melakukan pemodelan struktur jembatan, dimana pilar jembatan didesain ulang agar mengalami pelelehan pada saat gempa berlangsung. Hasil penelitian menunjukkan bahwa panjang sendi plastis yang ditempatkan pada pilar berbanding lurus dengan maksimum rotasi yang dihasilkan. Bentuk penampang pilar bulat terbukti memiliki kinerja yang lebih baik dibandingkan penampang persegi. Selain itu, pemodelan pondasi dalam desain struktur sebaiknya juga dilakukan untuk mendapatkan desain yang lebih konservatif. Dalam studi sensitifitas spektrum gempa, ditunjukkan bahwa respons struktur akan teramplifikasi pada saat frekuensi natural struktur berdekatan dengan muatan frekuensi dominan spektrum gempa.

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Structural post-elastic behavior due to earthquake cyclic loading can be shown by examining a nonlinear time history analysis. Structural design using the approach of performance based design is started with the forming of plastic hinges on the bridge nonlinear elements that is captured on its moment-rotation curves. The definition of potential plastic hinges is defined by the assignment of plastic hinge length (lp) and the discretization of fiber section on structure?s nonlinear elements (bridge piers).

The purpose of this research is to do a parametric study of plastic hinge length, piers cross section shape, and the foundation modeling to the obtained structural performance level. Besides that, this research will also review the sensitivity of earthquake spectrum to the forming of plastic hinges. This research is started with bridge structural modeling, where the piers will be redesigned so that their yielding limit exceeded when the earthquake happened.

The result of this research shows that the assignment of plastic hinge length is proportional to the obtained maximum rotation. Circular sections have a better performance compared to rectangular sections. Besides that, foundation modeling in structural design should be observed to get a more conservative design. In the sensitivity study of earthquake spectrum, this research shows that structural responses will be amplified when the frequency content of the motion and the natural frequencies of the structure are close to each other."

"The articles in this volume give an overview and introduction to nonlinear phenomena in structural dynamics. Topics treated are approximate methods for analyzing nonlinear systems (where the level of nonlinearity is assumed to be relatively small), vibration isolation, the mitigation of undesirable torsional vibration in rotating systems utilizing specifically nonlinear features in the dynamics, the vibration of nonlinear structures in which the motion is sufficiently large amplitude and structural systems with control."

"Permasalahan newsboy merupakan permasalahan memaksimumkan keuntungan pada produk yang mempunyai batas waktu penjualan dan jumlah permintaan yang belum pasti. Skripsi ini membahas permasalahan newsboy multiproduk dengan kapasitas penyimpanan gudang terbatas. Untuk mengatasi kekurangan produk akibat kapasitas penyimpanan gudang yang terbatas, penjual membeli produk di luar agen utama yang disebut agen outsourcing. Permasalahan newsboy ini dimodelkan ke dalam masalah nonlinear programming. Selanjutnya dijelaskan karakteristik solusi optimal dari permasalahan ini sehingga didapatkan solusi optimalnya.

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Newsboy problems is the problem of maximizing profits on products that have a time limit of sales and uncertain demand. This skripsi discuss multi-product newsboy problem with limited storage capacity. To deal with possible shortage of the product due to the limited storage capacity, the seller buy products outside the main agent called outsourcer. This newsboy problems can be modeled into a nonlinear programming problem. Next will be explained the properties of the optimal solution of this problem to obtain the optimal solution."

"Global analysis of nonlinear dynamics collects chapters on recent developments in global analysis of non-linear dynamical systems with a particular emphasis on cell mapping methods developed by Professor C.S. Hsu of the University of California, Berkeley. "

"Many engineering, operations, and scientific applications include a mixture of discrete and continuous decision variables and nonlinear relationships involving the decision variables that have a pronounced effect on the set of feasible and optimal solutions. Mixed-integer nonlinear programming (MINLP) problems combine the numerical difficulties of handling nonlinear functions with the challenge of optimizing in the context of nonconvex functions and discrete variables. MINLP is one of the most flexible modeling paradigms available for optimization."