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The Random and Fluctuating World最新文献

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SPATIAL PATTERNS INDUCED BY RANDOM SWITCHING 随机切换诱导的空间模式
The Random and Fluctuating World Pub Date : 2002-03-01 DOI: 10.1142/S0219477502000543
J. Buceta, K. Lindenberg, J. Parrondo
{"title":"SPATIAL PATTERNS INDUCED BY RANDOM SWITCHING","authors":"J. Buceta, K. Lindenberg, J. Parrondo","doi":"10.1142/S0219477502000543","DOIUrl":"https://doi.org/10.1142/S0219477502000543","url":null,"abstract":"We propose a mechanism whereby a random alternation of two dynamics each leading to a different homogeneous state can lead to complex ordered structures. The proposed general formalism, based on the ideas of so-called paradoxical games, is illustrated via numerical simulations of particular examples. The relevance of the present study to other situations that lead to pattern formation, such as reaction-diffusion systems, is noted.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123908802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
LOW-FREQUENCY NOISE IN AlGaN/GaN HETEROSTRUCTURE FIELD EFFECT TRANSISTORS AND METAL OXIDE SEMICONDUCTOR HETEROSTRUCTURE FIELD EFFECT TRANSISTORS 海藻/氮化镓异质结构场效应晶体管和金属氧化物半导体异质结构场效应晶体管中的低频噪声
The Random and Fluctuating World Pub Date : 2001-12-01 DOI: 10.1142/S0219477501000469
S. Rumyantsev, N. Pala, M. Shur, M. Levinshtein, P. Ivanov, M. Khan, G. Simin, J. Yang, X. Hu, A. Tarakji, R. Gaska
{"title":"LOW-FREQUENCY NOISE IN AlGaN/GaN HETEROSTRUCTURE FIELD EFFECT TRANSISTORS AND METAL OXIDE SEMICONDUCTOR HETEROSTRUCTURE FIELD EFFECT TRANSISTORS","authors":"S. Rumyantsev, N. Pala, M. Shur, M. Levinshtein, P. Ivanov, M. Khan, G. Simin, J. Yang, X. Hu, A. Tarakji, R. Gaska","doi":"10.1142/S0219477501000469","DOIUrl":"https://doi.org/10.1142/S0219477501000469","url":null,"abstract":"The dependence of the 1/f noise on 2D electron concentration in the channel nCh of AlGaN/GaN Heterostructure Field Effect Transistors and Metal Oxide Semiconductor Heterostructure Field Effect Transistors has been studied and compared. The dependencies of Hooge parameter αCh for the noise sources located in the channel of the transistors on sheet electron concentration are found identical for both types of devices. The increase of the Hooge parameter αCh with the decrease of the channel concentration observed in both types of devices confirms that the noise sources are located in the region under the gate in the AlGaN/GaN heterostructure and that electron tunneling from the 2D electron gas into the traps in GaN or AlGaN layers is a probable noise mechanism.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"50 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114039952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
ON THE STATISTICAL ANALYSIS OF NOISE IN CHEMICAL SENSORS AND ITS APPLICATION FOR SENSING 化学传感器噪声的统计分析及其在传感中的应用
The Random and Fluctuating World Pub Date : 2001-09-01 DOI: 10.1142/S0219477501000366
J. Smulko, C. Granqvist, L. Kish
{"title":"ON THE STATISTICAL ANALYSIS OF NOISE IN CHEMICAL SENSORS AND ITS APPLICATION FOR SENSING","authors":"J. Smulko, C. Granqvist, L. Kish","doi":"10.1142/S0219477501000366","DOIUrl":"https://doi.org/10.1142/S0219477501000366","url":null,"abstract":"Resistance noise data from a single gas sensor can be utilized to identify gas mixtures. We calculated the power spectral density, higher order probability densities and the bispectrum function of the recorded noise samples; these functions are sen sitive to different natural vapors and can be employed to select a proper detection criterion for gas composites and odors.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128294024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
LOW FREQUENCY NOISE CONVERSION IN FETs UNDER NONLINEAR OPERATION 非线性工作下场效应管的低频噪声转换
The Random and Fluctuating World Pub Date : 2001-09-01 DOI: 10.1142/S021947750100041X
F. Danneville, B. Tamen, A. Cappy, J. B. Juraver, O. Llopis, J. Graffeuil
{"title":"LOW FREQUENCY NOISE CONVERSION IN FETs UNDER NONLINEAR OPERATION","authors":"F. Danneville, B. Tamen, A. Cappy, J. B. Juraver, O. Llopis, J. Graffeuil","doi":"10.1142/S021947750100041X","DOIUrl":"https://doi.org/10.1142/S021947750100041X","url":null,"abstract":"The conversion mechanisms of microscopic low frequency noise sources (e.g. generation-recombination noise sources) located in the channel of a FET (Field Effect Transistor), in the presence of a large RF signal, are investigated. It is shown that the base-band (low frequency) input gate noise voltage spectral density is strongly dependent on the magnitude of the input RF power applied to the FET. Moreover, the microscopic generation-recombination noise sources distributed along the channel are also responsible of up-converted input gate noise voltage spectral density around the RF frequency.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128460050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
NOISE EFFECTS ON THE ELECTROSENSE-MEDIATED FEEDING BEHAVIOR OF SMALL PADDLEFISH 噪声对小白鲟电感觉摄食行为的影响
The Random and Fluctuating World Pub Date : 2001-06-01 DOI: 10.1142/S021947750100024X
D. F. Russell, A. Tucker, B. Wettring, A. Neiman, L. Wilkens, F. Moss
{"title":"NOISE EFFECTS ON THE ELECTROSENSE-MEDIATED FEEDING BEHAVIOR OF SMALL PADDLEFISH","authors":"D. F. Russell, A. Tucker, B. Wettring, A. Neiman, L. Wilkens, F. Moss","doi":"10.1142/S021947750100024X","DOIUrl":"https://doi.org/10.1142/S021947750100024X","url":null,"abstract":"Weak electrical noise applied in the water around small paddlefish, Polyodon spathula, increases the spatial range over which they can detect and capture planktonic prey (Daphnia), demonstrating stochastic resonance at the level of an animal's feeding behavior. Here we show that optimal-amplitude (~ 0.5 μ V·cm-1) noise causes a fish to prefer more vertical angles of attack when striking at prey, as revealed in polar graphs. Increased spatial range is also seen in horizontal directions, as outlying shoulders in the probability distribution of horizontal strike distances. High levels of noise increased the distance that approaching prey travelled along the rostrum (an elongated appendage anterior to the head, functioning as an electrosensitive antenna), before the fish first showed a visible fin or body motion in response. There was no significant effect of optimal-amplitude noise on the rate of strikes, although high-amplitude noise reduced the strike rate. The behavioral data were confirmed in neurophysiological experiments demonstrating that stochastic resonance occurs in individual electroreceptors, and in fact occurs at a similar optimal noise level as in behavioral experiments. We conclude that stochastic resonance can be demonstrated in the behavior of animals, and that animals can make use of the increased sensory information available during near-threshold environmental noise.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115908398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
CONTROLLING ACTIVATED PROCESSES 控制激活过程
The Random and Fluctuating World Pub Date : 2001-03-01 DOI: 10.1142/S0219477501000081
M. Dykman, B. Golding
{"title":"CONTROLLING ACTIVATED PROCESSES","authors":"M. Dykman, B. Golding","doi":"10.1142/S0219477501000081","DOIUrl":"https://doi.org/10.1142/S0219477501000081","url":null,"abstract":"The rates of activated processes, such as escape from a metastable state and nucleation, are exponentially sensitive to an externally applied field. We describe how this applies to modulation by high-frequency fields and illustrate it with experimental observations. The results may lead to selective control of diffusion in periodic potentials, novel control mechanisms for crystal growth, and new separation techniques.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114985156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
OPTIMAL DIFFUSIVE TRANSPORT IN A TILTED PERIODIC POTENTIAL 倾斜周期势中的最优扩散输运
The Random and Fluctuating World Pub Date : 2001-03-01 DOI: 10.1142/S0219477501000056
B. Lindner, M. Kostur, L. Schimansky-Geier
{"title":"OPTIMAL DIFFUSIVE TRANSPORT IN A TILTED PERIODIC POTENTIAL","authors":"B. Lindner, M. Kostur, L. Schimansky-Geier","doi":"10.1142/S0219477501000056","DOIUrl":"https://doi.org/10.1142/S0219477501000056","url":null,"abstract":"We study the diffusive motion of an overdamped Brownian particle in a tilted periodic potential. Mapping the continuous dynamics onto a discrete cumulative process we find exact expressions for the diffusion coefficient and the Peclet number which characterize the transport. At a sufficiently strong but subcritical bias an optimized transport with respect to the noise strength is observed. These results are confirmed by numerical solution of the Fokker-Planck equation.","PeriodicalId":191232,"journal":{"name":"The Random and Fluctuating World","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132500370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 47
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