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Runaway Electron Beam Instability in Slide-Away Discharges in the HT-7 Tokamak
CHEN Zhong-Yong,WAN Bao-Nian,LING Bi-Li,GAO Xiang,DU Qin,TI Ang,LIN Shi-Yao,S Sajjad,HT- Team,
陈忠勇
,万宝年,凌必利,高翔,杜勤,提昂,林士耀,S.Sajjad,HT-,Team

中国物理快报 , 2007,
Abstract: Slide-away discharges are achieved by decreasing the plasma density or ramping down the plasma current in runaway discharges in the HT-7 tokamak. In the case of plasma current ramp down, the ratio of the electron plasma frequency to the electron cyclotron frequency is higher than in the stationary pulses when the discharge goes into a slide-away regime. The instability regime is characterized by relaxations in the electron cyclotron emission due to relativistic anomalous Doppler effect which transfers energy from parallel to perpendicular motion. The triggering of relativistic anomalous Doppler effect at higher density by ramping down of plasma current may provide a alternative runaway energy control scenario.
The effect of gas puffing on plasma during slide-away discharge in the HT-7 tokamak
HT-7托卡马克slide-away放电充气对等离子体行为的影响

Lu Hong-Wei,Zha Xue-Jun,Hu Li-Qun,Lin Shi-Yao,Zhou Rui-Jie,Luo Jia-Rong,Zhong Fang-Chuan,
卢洪伟
,查学军,胡立群,林士耀,周瑞杰,罗家融,钟方川

物理学报 , 2012,
Abstract: In tokamak plasma,the discharge will turn into "runaway" discharge from normal discharge if the plasma density becomes very low.The discharge will enter into "slide-away" discharge if the density decays to a critical one,in which the confinement of plasma (exactly supper thermal electrons) is better than that in normal discharge.The confinement of plasma and the anomalous Doppler instability during slide-away discharge gas puffing are investigated.The effect of gas puffing on runaway electrons during slide-away discharge is also studied in this paper.It is found that the anomalous Doppler instability can be suppressed by the gas puffing during slide-away discharge,while the confinement of plasma becomes poor,and many high energy runaway electrons occur during gas puffing.
3D hybrid computations for streamer discharges and production of run-away electrons  [PDF]
Chao Li,Ute Ebert,Willem Hundsdorfer
Physics , 2009, DOI: 10.1088/0022-3727/42/20/202003
Abstract: We introduce a 3D hybrid model for streamer discharges that follows the dynamics of single electrons in the region with strong field enhancement at the streamer tip while approximating the many electrons in the streamer interior as densities. We explain the method and present first results for negative streamers in nitrogen. We focus on the high electron energies observed in the simulation.
Slide Statistics And Financial Returns  [PDF]
William J. Ralph
Statistics , 2015,
Abstract: We introduce a new approach to financial returns based on an infinite family of statistics called slide statistics. The evidence these statistics provide suggests that certain distributions such as the stable distributions are not good models for the financial returns from various securities and indexes. The slide statistics are derived from a variant of differential entropy called the genial entropy and can be computed for any sample in a metric space. We give explicit formulas for the first two of these statistics that are easily evaluated by a computer and make this theory particularly suitable for applications. In simulations with a normal random variable, the first slide statistic appears to converge to Pi/4 and for certain other random variables it appears to converge to the reciprocal of the Hausdorff dimension.
Whole Slide Imaging and telepathology
J Galvez
Breast Cancer Research , 2003, DOI: 10.1186/bcr669
Abstract: The immediate need has been for publication quality images that are connected to a robust database. This has been accomplished using a shareware program that is connected to our SQL Mutant Mouse Pathology Archive database. This program develops Image Galleries 'on the fly' that can display still images with demographic, genetic, and diagnostic information stored in the database. The application includes a dialog box that permits the viewer and the pathologist to exchange information and comments. However, the images are limited to adynamic jpeg and tiff files that illustrate limited fields selected by the photographer and do not display or annotate the image in full context.To provide the digital view of the complete slide in context, several new technologies have been merged to the Image Archive using Whole Slide Imaging. Whole Slide images are digital images of the entire block face or slide. These digitized images are captured, compressed and viewed on any browser over the internet. The digital image allows users to view entire microscopic images at any magnification on their monitor. The images are captured with the ScanScope (AperioTech Inc., Vista, CA, USA) in approximately 3–5 min at a resolution of 50,000 dpi, producing 8–20 Gb of raw data. To make the images accessible to the community, the images are processed with the Zoomify compression algorithm which results in a 200–300 Mb image that can be viewed with a standard web browser using a Flash6 plug-in. The plug-in only downloads the pixels required to render the view requested by the user (approximately 75 kb/view).The images can be annotated with layers that point to specific features in the image allowing users to easily navigate to selected points of interest within a slide while still being able to maneuver the entire slide. Examples of these images can be viewed online http://imagearchive.compmed.ucdavis.edu webcite.The full capabilities of the Zoomify system, have been exploited by combining the Who
Making Slide Shows with Zoomquilts
Lin Cong,Ruo-Feng Tong,Jin-Xiang Dong,
丛林
,童若锋,董金祥

计算机科学技术学报 , 2010,
Abstract: We present a novel method for generating a slide show, which takes as input a collection of images, and outputs a video consisting of these images, switching between images smoothly in a continuous zoom-like process: as the sequence plays, a miniature of the next image is embedded in the current image and enlarges until eventually replaces the current image. Color differences, texture similarity, image complexity, etc. are taken into account to measure the distance between two images. Based on this distance...
The Slide Dimension of Point Processes  [PDF]
William J. Ralph
Mathematics , 2014,
Abstract: We associate with any finite subset of a metric space an infinite sequence of scale invariant numbers $\rho_1,\rho_2,\dots$ derived from a variant of differential entropy called the genial entropy. As statistics for point processes, these numbers often appear to converge in simulations and we give examples where $1/\rho_1$ converges to the Hausdorff dimension. We use the $\rho_n$ to define a new notion of dimension called the slide dimension for a special class of point processes on metric spaces. The slide calculus is developed to define $\rho_n$ and an explicit formula is derived for the calculation of $\rho_1$. For a uniform random variable X on $[0,1]^n$, evidence is given that $\rho_1(X) =1/n$ and $\rho_2(X) =-\pi^2/(6n^2)$ and simulations with a normal variable $Z$ suggest that $\rho_1(Z) =4/\pi$ and $\rho_2(Z) =-1$. Some potential applications to spatial statistics are considered.
Analysis of dusty plasma in the positive column of glow discharges
Wang De-Zhen,Wu Hong-Tao,
王德真
,吴洪涛

中国物理 B , 2002,
Abstract: The radial distributions of ions, electrons and dust particles in the positive column of glow discharges are investigated in a triple-pole diffusion model. The dust particles are mainly trapped in the region around the column axis where the electrostatic potential is the highest. The presence of the dust particles results in the ion density increasing and the electron density decreasing in the dust-trapped region. The dust-trapped region is wider for a higher dust temperature or a smaller particulate radius. The ions and electrons in the dust-free region away from the column axis are in ambipolar diffusion.
Explaining Away Intuitions  [cached]
Jonathan Ichikawa
Studia Philosophica Estonica , 2009,
Abstract: What is it to explain away an intuition? Philosophers regularly attempt to explain intuitions away, but it is often unclear what the success conditions for their project consist in. I attempt to articulate some of these conditions, taking philosophical case studies as guides, and arguing that many attempts to explain away intuitions underestimate the challenge the project of explaining away involves. I will conclude, therefore, that explaining away intuitions is a more difficult task than has sometimes been appreciated; I also suggest, however, that the importance of explaining away intuitions has often been exaggerated.
Characterization of microhollow cathode discharges
Gomes, M.P.;Sismanoglu, B.N.;Amorim, J.;
Brazilian Journal of Physics , 2009, DOI: 10.1590/S0103-97332009000100004
Abstract: this work is devoted to the study of the electrical characteristics of microhollow cathode discharges (mhcd) at moderate to high pressure in argon and air for different geometries. high-pressure glow discharges can be operated in mhcd devices with μm electrode spacing. experiments have been performed to determine the so-called paschen curves, i.e. the dependence of the breakdown voltage on the product electrode gap and gas pressure. current-voltage characteristic curves were obtained as a function of the pressure and hole diameter. mhcd enables stable direct current discharges that could be ignited for pressures ranging from 12 to 800 torr, in a very wide range of current densities and electrodes materials. evidence of electron field emission was observed for several ranges of gap spacing.
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