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PENDIDIKAN FAKTOR UTAMA PEMBINAAN RAKYAT MISKIN
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| Pengarang | : | L. Hariandja |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VIII-7, JULI (No. 7) |
| Halaman | : | 624-640 |
| Abstrak | : | - |
IEEE CIS Educations Activities Vision Statement
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Computational intelligence |
| Volume / Edisi | : | 8 (No. 1) |
| Halaman | : | 6 |
| Abstrak | : | - |
IEEE CIS Publications Activities Vision Statement
| Pengarang | : | Pal, Nikhil R. |
| Nama Majalah/Jurnal | : | IEEE Computational intelligence |
| Volume / Edisi | : | 8 (No. 1) |
| Halaman | : | 4-5 |
| Abstrak | : | - |
MENINGKATKAN TRANSMIGRASI SEBAGAI USAHA MEMBERANTAS ATAU MENGURANGI KEMISKINAN
| Pengarang | : | Murwatie B. Rahardjo |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VIII-7, JULI (No. 7) |
| Halaman | : | 607-623 |
| Abstrak | : | - |
MENINGKATKAN PENDAPATAN SEKTOR PERTANIAN DI INDONESIA
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Analisa |
| Volume / Edisi | : | VIII-7, JULI (No. 7) |
| Halaman | : | 573-592 |
| Abstrak | : | - |
Robin Hood Model versus Sheriff of Nottingham Model: Transfers in Population Dynamics
| Pengarang | : | Quentin Griette, Pierre Magal |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 85 (No. 4) |
| Halaman | : | 1387-1415 |
| Abstrak | : | We study the problem of transfers in a population structured by a continuous variable corresponding to the quantity being transferred. The model takes the form of an integro-differential equations with kernels corresponding to the specific rules of the transfer process. We focus our interest on the well-posedness of the Cauchy problem in the space of measures. We characterize transfer kernels that give a continuous semiflow in the space of measures and derive a necessary and sufficient condition for the stability of the space ????1 of integrable functions. We construct some examples of kernels that may be particularly interesting in economic applications. Our model considers blind transfers of economic value (e.g., money) between individuals. The two models are the “Robin Hood model,” where the richest individual unconditionally gives a fraction of their wealth to the poorest when a transfer occurs, and at the other extreme, the “Sheriff of Nottingham model,” where the richest unconditionally takes a fraction of the poorest’s wealth. Between these two extreme cases is a continuum of intermediate models obtained by interpolating the kernels. We illustrate those models with numerical simulations and show that any small fraction of the “Sheriff of Nottingham” in the transfer rules leads to a segregated population with extremely poor and extremely rich individuals after some time. Although our study is motivated by economic applications, we believe it is a first step towards a better understanding of many transfer phenomena occurring in the life sciences. |
Dissipative Dynamics of Volterra Disclinations
| Pengarang | : | Pierluigi Cesana, Alfio Grillo, Marco Morandotti, Andrea Pastore |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 85 (No. 4) |
| Halaman | : | 1361-1386 |
| Abstrak | : | The dissipative dynamics of a system of particles subject to a fourth order potential field modeling the evolution of wedge disclinations is studied, focusing on finite systems of disclinations within a circular domain. Existence theorems for the trajectories of these disclinations are presented, considering both the dynamics without predefined preferred directions of motion in an isotropic medium and the dynamics in which the disclinations move parallel to predefined directions, modeling a crystalline material. The analysis is illustrated with a number of numerical solutions to demonstrate various relevant configurations. |
Full Euler Equations for Waves Generated by Vertical Seabed Displacements
| Pengarang | : | Joao Vitor P. Poletto, David Andrade, Marcelo V. Flamarion, Roberto Ribeiro-Jr |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 85 (No. 4) |
| Halaman | : | 1344-1360 |
| Abstrak | : | We present a numerical method for simulating the generation and propagation of surface gravity waves by vertical seabed displacements. The cornerstone of our method is the computation of a time-dependent conformal map that incorporates the time-dependent geometry of the seabed in the physical domain and the dynamic wave profile at the free surface, thus enabling us to spectrally integrate the fully nonlinear Euler equations without further restrictions in nonlinearity or dispersion. We validate our numerical method using the linear model for waves generated by small vertical seabed displacements. Comparisons are made between the linear and fully nonlinear models. Finally, we compare the active and passive generation approaches. Solutions of the fully nonlinear Euler equations reveal shortcomings of the passive generation approach; while it yields accurate predictions during the generation stage and propagation of the leading waves, it underestimates the waveheight and wave profiles of subsequent waves. |
Long-Time Dynamics of a Competition Model with Nonlocal Diffusion and Free Boundaries: Chances of Successful Invasion
| Pengarang | : | Yihong Du, Wenjie Ni, Linfei Shi |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 85 (No. 4) |
| Halaman | : | 1315-1343 |
| Abstrak | : | We aim to understand the dynamics of an invading species via a two species competition model of Lotka–Volterra type with nonlocal diffusions, where the invader with density ?????(????,????) invades the territory (represented by the real line ?) of a native competitor with density ?????(????,????), via two fronts, ???? =?????(????) on the left and ???? =??(????) on the right. So the population range of the invader ???? is the evolving interval [?????(????),??(????)] and the reaction-diffusion equation for ???? has two free boundaries, with ?????(????) decreasing in ???? and ??(????) increasing in ????. Let ?∞ :=??(∞) ≤∞ and ????∞ :=?????(∞) ≥−∞. In our earlier work [Y. Du, W. Ni, and L. Shi, SIAM J. Math. Anal., 57 (2025), pp. 1195–1226], some detailed descriptions of the long-time dynamics of the model were obtained according to whether ?∞ −????∞ is ∞ or finite. In the latter case, we proved that the invader ???? vanishes in the long run and ???? survives the invasion, while in the former case, we obtained a rather satisfactory description of the long-time asymptotic limits of ?????(????,????) and ?????(????,????) when the parameter ???? in the model is less than 1 (meaning that the competition from ???? felt by ???? is relatively weak). In the current paper, first we obtain sharp criteria to distinguish the case ?∞ −????∞ =∞ from the case ?∞ −????∞ <∞. Second, for the remaining case ???? ≥1, we reveal complicated but interesting dynamics. For example, when ???? ≥1 and ???? is a weak competitor, (a) we obtain biologically meaningful conditions that guarantee the vanishing of the invader ????, and (b) we reveal chances for ???? to invade successfully; in particular, we demonstrate that both ?∞ =∞ =−????∞ and ?∞ =∞ >−????∞ are possible (the latter seems to be the first example for this kind of population model, with either local or nonlocal diffusion). |
Guru Sekolah Menengah Dewasa ini. Studi Kasus di Sekolah-Sekolah Menengah Katolik
| Pengarang | : | Th. Yanti Irawati |
| Nama Majalah/Jurnal | : | Gatra : ke arah pengajaran bahasa dan sastra Indonesia |
| Volume / Edisi | : | XI (No. 16) |
| Halaman | : | 45-56 |
| Abstrak | : | - |