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Search Results: 1 - 10 of 24330 matches for " Liang-Kleeman information flow "
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The Liang-Kleeman Information Flow: Theory and Applications
X. San Liang
Entropy , 2013, DOI: 10.3390/e15010327
Abstract: Information flow, or information transfer as it may be referred to, is a fundamental notion in general physics which has wide applications in scientific disciplines. Recently, a rigorous formalism has been established with respect to both deterministic and stochastic systems, with flow measures explicitly obtained. These measures possess some important properties, among which is flow or transfer asymmetry. The formalism has been validated and put to application with a variety of benchmark systems, such as the baker transformation, Hénon map, truncated Burgers-Hopf system, Langevin equation, etc. In the chaotic Burgers-Hopf system, all the transfers, save for one, are essentially zero, indicating that the processes underlying a dynamical phenomenon, albeit complex, could be simple. (Truth is simple.) In the Langevin equation case, it is found that there could be no information flowing from one certain time series to another series, though the two are highly correlated. Information flow/transfer provides a potential measure of the cause–effect relation between dynamical events, a relation usually hidden behind the correlation in a traditional sense.
Order Degree Evaluation of Information System Based on Improved Structural Entropy  [PDF]
Zhiting Song, Peipei Liang, Li Ni
Open Journal of Business and Management (OJBM) , 2015, DOI: 10.4236/ojbm.2015.33023
Abstract: To solve the problem that available methods of order degree evaluation ignore the heterogeneous information interactions between subsystems, an improved method of order degree evaluation, based on structural entropy, is proposed from the perspective of heterogeneous interactions between subsystems. A case study is proposed to test our model, and order degree under the two scenarios is contrasted. Result shows that directed information flow increases timeliness of information and decreases accuracy of information, which is repeatedly verified in practice. The proposed model, which is more in line with the actual structure of information system, not only further improves order degree evaluation in theory, but also provides operational method to order degree evaluation in real-world information systems.
Redes de coopera??o com foco em inova??o: um estudo exploratório
Tálamo, José Roberto;Carvalho, Marly Monteiro de;
Gest?o & Produ??o , 2010, DOI: 10.1590/S0104-530X2010000400009
Abstract: the objective of this study is to identify the critical and motivational factors for the success of cooperation networks focused on innovation. therefore, an exploratory study was carried out in three intensive technology cooperation networks that consist of fifteen companies. the findings demonstrated that the cooperation network structure provides the participant companies with effective results by improving competitiveness and flexibility meeting market challenges. however, it demands maturity of the cooperation networks and entrepreneurs who integrate them in order to overcome cultural difficulties preventing barriers to learning and to the synergistic profile.
O fluxo da informa??o na prática clínica dos médicos residentes: análise na perspectiva da medicina baseada em evidências
Savi, Maria Gorete Monteguti;Silva, Edna Lucia da;
Ciência da Informa??o , 2009, DOI: 10.1590/S0100-19652009000300012
Abstract: this study analyses information flow in the clinical practice of resident physicians. to this end it considers the precepts of evidence based medicine] (ebm), and focuses on resident physicians at ufsc university hospital medical clinics. the relevance of this research project is underpinned by several reasons: the recognition of ebm in clinical practice as an alternative that can support clinical decisions, through the selection of information sources of greater evidence available in medical literature; verification that there is a lack of studies on resident physicians in the national literature - the majority of studies have focused on the manner that physicians and professors in health fields use the information systems and services; the conviction that the use of information selected according to criteria encourages more efficient clinical practice. this study identifies and analyses the processes involved in information flow in clinical practice by physicians from the perspectives of selection, access, retrieval and use of information sources. it presents an ideal model of information flow from the perspective of ebm.
Fluxo enxuto de informa??o: um novo conceito
Greef, Ana Carolina;Freitas, Maria do Carmo Duarte;
Perspectivas em Ciência da Informa??o , 2012, DOI: 10.1590/S1413-99362012000100003
Abstract: information represents a value delivered in accordance to demands of its customers generating innovation, competitiveness and intelligence. the quality of information flow managed in organizations makes their decision-making processes easier. when applied in organizations lean thinking identifies the expected value of customers, creates patterns in manufacturing processes, eliminates failures and improves processes continuously. this article results from exploratory research which provides parameters for qualification of the management and the operation of information flows, that are based on criteria derived from the lean thinking. it presents a concept of lean information flow, designed and analyzed according to the theoretical framework in information science and lean thinking. the research brings about new theoretical elements of potential use by information professionals and presents as contribution a scientific basis for discussions regarding the evaluation of information flow.
The Obstacles Facing the Flow of the Electronic Information in the Arab World
Samir Yahya Umri
Cybrarians Journal , 2006,
Abstract: This research views the most important obstacles facing the flow of electronic information in Arab world; with an illustration about the effect of each obstacle on the flowing of the information, and the special recommendation to overcome it. the research states 4 main obstacles; they are: number of internet users and the weakness of the infrastructure in our Arab world, the spam e-mails, the Bugs and vulnerabilities in the operating systems that allow hackers to attack the information systems, and the spread of the electronic pornography on the internet
Design of an Agent Based Traffic-Information Collection System
Kenedy Aliila Greyson
Journal of Computations & Modelling , 2012,
Abstract: Currently, traffic congestions are common events in road networks of main cities in developing countries. It has been observed that, the size of congestion increases year after year. For traffic congestion management to work efficiently, sufficiently and accurately information are needed. In this research we present an alternative method using agent technology to collect and manipulate data so as to be used in optimizing the vehicle flow within the road networks. The objective is to design an agent based system to provide sufficient and accurate information used in traffic flow management, and vehicle traffic congestion mitigation. The implementation approach is presented. The case study is a portion of the road network from the city of Dar es Salaam.
GIS Based Methodology for Groundwater Flow Estimation across the Boundary of the Study Areain Groundwater Flow Modeling  [PDF]
Vijai Singhal, Rohit Goyal
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.311092
Abstract: Pali district, Rajasthan, India has been facing severe pollution of groundwater due to release of untreated industrial effluent of textile industries into the Bandi River flowing through the Pali city. A groundwater flow and transport modeling exercise has been undertaken by MNIT, Jaipur, India to understand the groundwater flow regime and to study the different scenarios. In the modeling exercise partially penetrating ephemeral rivers have been taken as part of model boundaries wherever more appropriate boundaries were not available in the near vicinity. These boundaries have been considered as constant flow boundaries. Aim of this paper is to present a methodology to calculate the average flux through such boundaries from readily available data such as bore logs and groundwater levels. The study area boundary was divided in to several cross sections and average values of groundwater flow gradients normal to the boundary were calculated for different monsoon and non monsoon seasons for different years. The entire boundary was then regrouped into 8 boundary segments on the basis of average values of gradients for individual line segments and mean gradient values for these line segments were calculated. Values of ground level, bottom elevations of hydros-tratigraphic layers and average water depth were extracted for a number of points on these line segments from the respective layers and these values were used to calculate equivalent horizontal hydraulic conductivity of the multi-layered aquifer system at every point. The Darcy’s law was then used to calculate inflow/outflow per m length of the boundary at each point. The methodology presented here is simple and is based on the assumption that the groundwater level gradients do not change significantly for different seasons and amongst different years which has been validated in the present groundwater modeling study. The paper demonstrates a GIS based methodology to work out inflow/outflow across boundary of a study area in the cases where no flow boundaries in the vicinity of the study area cannot be identified.
Mudan?a estrutural no fluxo do conhecimento: a comunica??o eletr?nica
Barreto, Aldo de Albuquerque;
Ciência da Informa??o , 1998, DOI: 10.1590/S0100-19651998000200003
Abstract: the relationship between the information flow and the public, which is exposed to knowledge assimilation, has changed its structural model. information technology has played a major role in this changing process. the electronic communication is analyzed as a way of disseminating information more profitable to the user than the oral or written process. the publicity of information and knowledge has become more efficient and accessible in the computer era.
Informa??es essenciais para a caracteriza??o de um sistema de análise em fluxo
Arruda, Marco Aurélio Zezzi;Collins, Carol H.;
Química Nova , 2005, DOI: 10.1590/S0100-40422005000400032
Abstract: essential aspects for characterization of a flow-based analytical procedure or system are discussed in order to permit the composition of a checklist that will lead to a protocol for reporting results and systems in flow analysis. aspects more related to chromatographic procedures are not considered. the intent is to present normalized proposals in the field of flow analysis for practitioners and developers.
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