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JournalISSN: 0288-5883

The annual research report 

The MIT Press
About: The annual research report is an academic journal. The journal publishes majorly in the area(s): Plasma & Magnetic field. It has an ISSN identifier of 0288-5883. Over the lifetime, 1296 publications have been published receiving 14949 citations.
Topics: Plasma, Magnetic field, Tokamak, Ion, Electron


Papers
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Journal Article
TL;DR: The Rapidly-exploring Random Tree (RRT) as discussed by the authors is a data structure designed for path planning problems with high degrees of freedom and non-holonomic constraints, including dynamics.
Abstract: We introduce the concept of a Rapidly-exploring Random Tree (RRT) as a randomized data structure that is designed for a broad class of path planning problems. While they share many of the bene cial properties of existing randomized planning techniques, RRTs are specifically designed to handle nonholonomic constraints (including dynamics) and high degrees of freedom. An RRT is iteratively expanded by applying control inputs that drive the system slightly toward randomly-selected points, as opposed to requiring point-to-point convergence, as in the probabilistic roadmap approach. Several desirable properties and a basic implementation of RRTs are discussed. To date, we have successfully applied RRTs to holonomic, nonholonomic, and kinodynamic planning problems of up to twelve degrees of freedom.

3,474 citations

Journal Article
TL;DR: In this paper, the basic nonlinear equation which describes the Alfven waves, with small but finite amplitude propagating along the magnetic field in cold plasmas, is derived modifying the reductive perturbation method proposed by Taniuti and Wei.
Abstract: The basic nonlinear equation which describes the Alfven waves, with small but finite amplitude propagating along the magnetic field in cold plasmas, is derived modifying the reductive perturbation method proposed by Taniuti and Wei. Then as a result, the nonlinear dispersion relation is obtained through a procedure which clarifies the physical meaning. Furthermore, the modified nonlinear Schrodinger equation which describes the modulated Alfven wave more correctly than the previous works is proposed. An example of the nonlinear phenomena is shown by the numerical calculations of the initial value problem, using our basic equation for the Alfven waves.

310 citations

Journal Article
Yoshisuke Ueda1
TL;DR: In this article, the authors dealt with turbulent or chaotic phenomena which occur in the system governed by the Duffing's equation, a special type of two-dimensional periodic system, by using analog and digital computers, experiments were carried out with special reference to the change of attractors and of average power spectra of the random processes under the variation of the system parameters.
Abstract: This paper deals with turbulent or chaotic phenomena which occur in the system governed by Duffing's equation, a special type of two-dimensional periodic system. By using analog and digital computers, experiments are carried out with special reference to the change of attractors and of average power spectra of the random processes under the variation of the system parameters. On the basis of the experimental results, an outline of the random process is made clear. The results obtained in this paper will be applied to various physical problems and will also serve as material for the development of a proper mathematics of this phenomenon.

256 citations

Posted Content
TL;DR: A first-order autoregressive distributed lag model in both space and time is presented that encompasses a wide series of simpler models frequently used in the analysis of space-time data as well as models that better fit the data and have never been used before.
Abstract: This paper presents a first-order autoregressive distributed lag model in both space and time. It is shown that this model encompasses a wide series of simpler models frequently used in the analysis of space-time data as well as models that better fit the data and have never been used before. A framework is developed to determine which model is the most likely candidate to study space-time data. As an application, the relationship between the labor force participation rate and the unemployment rate is estimated using regional data of Germany, France and the UK derived from Eurostat, 1983-1993.

235 citations

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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
20213
20201
20191
201832
2017135
201697