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Littérature scientifique sur le sujet « Information dissemination and diffusion »

Auteur : Grafiati
Publié le 10 mars 2023
Mis à jour le 11 mars 2023

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Articles de revues sur le sujet "Information dissemination and diffusion"

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Yu, Jianye, Junjie Lv, Yuanzhuo Wang et Jingyuan Li. « Mechanism analysis of competitive information asynchronous dissemination on social networks ». International Journal of Modern Physics C 30, no 11 (novembre 2019) : 1950094. http://dx.doi.org/10.1142/s0129183119500943.

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Information dissemination groups, especially those disseminating the same kind of information such as advertising, product promotion, etc., compete with each other when their information spread on social networks. Most of the existing methods analyze the dissemination mechanism mainly upon the information itself without considering human characteristics, e.g. relation networks, cooperation/defection, etc. In this paper, we introduce a framework of social evolutionary game (SEG) to investigate the influence of human behaviors in competitive information dissemination. Coordination game is applied to represent human behaviors in the competition of asynchronous information diffusion. We perform a series of simulations through a specific game model to analyze the mechanism and factors of information diffusion, and show that when the benefits of competitive information is around 1.2 times of the original one, it can compensate the loss of reputation caused by the change of strategy. Furthermore, through experiments on a dataset of two films on Sina Weibo, we described the mechanism of competition evolution over real data of social network, and validated the effectiveness of our model.
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McEwan, Bree, Christopher J. Carpenter et Jill E. Hopke. « Mediated Skewed Diffusion of Issues Information : A Theory ». Social Media + Society 4, no 3 (juillet 2018) : 205630511880031. http://dx.doi.org/10.1177/2056305118800319.

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The modern media ecology has changed drastically over the last decade yet scholarly theoretical perspectives lag behind lay theories regarding news diffusion making it difficult to fully articulate and understand the processes driving dissemination of information and persuasion across networks and media contexts. The proposed theoretical framework takes into account extant research on the multiple mechanisms, specifically, cognitive ego involvement, the media environment, and interpersonal processes that operate in concert to influence the way information about societal issues is diffused through digital communication channels. The theoretical framework of mediated skewed diffusion of issues information provides 11 testable propositions. These are put forth to provide a foundation and encourage future research on information dissemination, online persuasion, and position polarization.
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Cheng, Shin-Ming, Vasileios Karyotis, Pin-Yu Chen, Kwang-Cheng Chen et Symeon Papavassiliou. « Diffusion Models for Information Dissemination Dynamics in Wireless Complex Communication Networks ». Journal of Complex Systems 2013 (4 septembre 2013) : 1–13. http://dx.doi.org/10.1155/2013/972352.

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Information dissemination has become one of the most important services of communication networks. Modeling the diffusion of information through such networks is crucial for our modern information societies. In this work, novel models, segregating between useful and malicious types of information, are introduced, in order to better study Information Dissemination Dynamics (IDD) in wireless complex communication networks, and eventually allow taking into account special network features in IDD. According to the proposed models, and inspired from epidemiology, we investigate the IDD in various complex network types through the use of the Susceptible-Infected (SI) paradigm for useful information dissemination and the Susceptible-Infected-Susceptible (SIS) paradigm for malicious information spreading. We provide analysis and simulation results for both types of diffused information, in order to identify performance and robustness potentials for each dissemination process with respect to the characteristics of the underlying complex networking infrastructures. We demonstrate that the proposed approach can generically characterize IDD in wireless complex networks and reveal salient features of dissemination dynamics in each network type, which could eventually aid in the design of more advanced, robust, and efficient networks and services.
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Utami, Sabrina Rahma, et Pitoyo Pitoyo. « Communication strategy of the Communication and Informatics Department of Payakumbuh in disseminating Covid-19 information in March – August 2021 ». Indonesian Journal of Communication Studies 14, no 2 (24 janvier 2022) : 92. http://dx.doi.org/10.31315/ijcs.v14i2.5397.

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The Covid-19 pandemic is a situation that requires proper handling so that it does not spread further. Dissemination of Covid-19 information is one of the steps taken by the communication and informatics department of Payakumbuh (Diskominfo) to increase public participation by providing knowledge and changing people's attitudes to be able to take steps to prevent Covid-19. This study aims to determine the form of communication strategy of The Communication and Informatics Department of Payakumbuh in disseminating information on Covid-19 with supporting factors and inhibiting factors in its implementation. This research uses a qualitative approach with constructivism paradigm. The theory used in this study is the theory of diffusion of innovation. Data collection techniques were carried out through in-depth and semi-structured interviews, as well as observation. The results of the study show that the form of communication strategy is the stages of compiling communicants or communication targets, messages in the dissemination of Covid-19 information, media selection, determining the frequency of information dissemination, the role of communicators, and public response to the dissemination of information on Covid-19. One of the supporting factors in the dissemination of Covid-19 information is that The Communication And Informatics Department Of Payakumbuh’s public relations officer has understood the use of information and communication technology, thus facilitating the dissemination of Covid-19 information through new media, and one of the inhibiting factors is the lack of coordination at The Communication and Informatics Department Of Payakumbuh in managing the website, and the unopenness of hospital management in Payakumbuh in providing information updates on Covid-19 in Payakumbuh City.
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Guo, Rongchun. « News Hotspot Event Diffusion Mechanism Based on Complex Network ». Mathematical Problems in Engineering 2022 (28 mai 2022) : 1–9. http://dx.doi.org/10.1155/2022/1455324.

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The wide range of social hot news events on the Internet has made the Internet have a great impact on the public. However, there are few studies on Internet information. In order to improve the efficiency of user network information dissemination of Internet information based on complex network theory and model simulation, this paper makes a more in-depth study on information dissemination on the Internet, constructs a complex network of Internet information dissemination, and analyzes the static topology and dynamic evolution process of the network. Using the attention relationship between Internet users, the Internet information dissemination network, degree, and path were used to select multiple indicators. The static topology of the network is analyzed by using the complex network theory. The study found that the complex network of Internet information is different from other complex networks. The influencing factors of network dynamic evolution are studied from three aspects: overall structure, local structure, and time constraints. The evolution trend of different forms and overall network nodes in the evolution process was explored, and the network dynamic evolution process model was constructed. Practice shows that the model can better describe the evolution process of network information dissemination in complex networks. The degree values of the two networks are positively correlated with the corresponding average clustering coefficients, and the networks have a significant hierarchy. The correlation between news hot events and network nodes is not as good as users’ attention to the network.
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Akhter, Pervaiz, Tanveer Hussain et Hafiz Bilal Ahsan. « Mass Media as a Source of Agricultural Information : An Overview of Literature ». Global Regional Review VI, no II (30 juin 2021) : 58–63. http://dx.doi.org/10.31703/grr.2021(vi-ii).08.

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This research paper provides a systematic review of published research work by different research scholars regarding the role of communication channels in disseminating agricultural information and the diffusion of agricultural innovations among agriculturists. Findings of review are summarized with the help of reviewing methodology, major findings and implications of earlier published researches. The review depicts that there are significant variations in findings of the relevant researches some certain reasons like geographical, methodological and theoretical perspectives. It is hard to draw any specific conclusion about the role of a different communication channel in the agriculture sector. However, the review has revealed that the different channels of communication have a different role regarding the dissemination of agricultural information and diffusion of innovations amongst farmers.
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Vavryk, Petro. « One approach to formalizing the process of information dissemination based on diffusion-limited aggregation ». Bulletin of Taras Shevchenko National University of Kyiv. Series : Physics and Mathematics, no 1 (2022) : 61–66. http://dx.doi.org/10.17721/1812-5409.2022/1.8.

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This article examines one of the approaches to the formalization of information dissemination processes based on the diffusion-limited aggregation model, using elements of cellular automata and their analogs. The model describes the dynamics of the information dissemination process without the influence of the mass media by taking into account the facts of information exchange that occurs during communication between participants of an arbitrary target audience. It is believed that the process is characterized by the property of self-similarity. An approach is proposed that makes it possible to study the dynamics of information dissemination processes, taking into account the attitude of the group members to each other and the attitude of the participants to the input information. As a result, an assessment of the effectiveness of the information dissemination process was obtained, which allows drawing conclusions regarding the success of information promotion measures. To demonstrate the processes of information dissemination modeled on the basis of the approach, the results of numerical experiments are presented, in which the implementation of the information exchange procedure for each person is limited to three members of the target group.
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Ivokhin, Evgeniy V., et Yuriy A. Naumenko. « On Formalization of Information Dissemination Processes Based on Hybrid Diffusion Models ». Journal of Automation and Information Sciences 50, no 7 (2018) : 79–86. http://dx.doi.org/10.1615/jautomatinfscien.v50.i7.70.

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Knight, David W., Arren Mendezona Allegretti et Jerry J. Vaske. « Information dissemination-diffusion and marine protected area approval in the Philippines ». Ocean & ; Coastal Management 113 (août 2015) : 38–46. http://dx.doi.org/10.1016/j.ocecoaman.2015.05.016.

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Han, Shao Chun, Yun Liu, Hui Ling Chen et Zhen Jiang Zhang. « Influence Model of User Behavior Characteristics on Information Dissemination ». International Journal of Computers Communications & ; Control 11, no 2 (26 janvier 2016) : 209. http://dx.doi.org/10.15837/ijccc.2016.2.2441.

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Quantitative analysis on human behavior, especially mining and modeling temporal and spatial regularities, is a common focus of statistical physics and complexity sciences. The in-depth understanding of human behavior helps in explaining many complex socioeconomic phenomena, and in finding applications in public opinion monitoring, disease control, transportation system design, calling center services, information recommendation. In this paper,we study the impact of human activity patterns on information diffusion. Using SIR propagation model and empirical data, conduct quantitative research on the impact of user behavior on information dissemination. It is found that when the exponent is small, user behavioral characteristics have features of many new dissemination nodes, fast information dissemination, but information continued propagation time is short, with limited influence; when the exponent is big, there are fewer new dissemination nodes, but will expand the scope of information dissemination and extend information dissemination duration; it is also found that for group behaviors, the power-law characteristic a greater impact on the speed of information dissemination than individual behaviors. This study provides a reference to better understand influence of social networking user behavior characteristics on information dissemination and kinetic effect.
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Thèses sur le sujet "Information dissemination and diffusion"

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Agarwal, Rachit. « Towards enhancing information dissemination in wireless networks ». Thesis, Evry, Institut national des télécommunications, 2013. http://www.theses.fr/2013TELE0020/document.

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Dans les systèmes d'alertes publiques, l’étude de la diffusion des informations dans le réseau est essentielle. Les systèmes de diffusion des messages d'alertes doivent atteindre beaucoup de nœuds en peu de temps. Dans les réseaux de communication basés sur les interactions “device to device”, on s'est récemment beaucoup intéressé à la diffusion des informations et le besoin d'auto-organisation a été mis en évidence. L'auto-organisation conduit à des comportements locaux et des interactions qui ont un effet sur le réseau global et présentent un avantage de scalabilité. Ces réseaux auto-organisés peuvent être autonomes et utiliser peu d'espace mémoire. On peut développer des caractères auto-organisés dans les réseaux de communication en utilisant des idées venant de phénomènes naturels. Il semble intéressant de chercher à obtenir les propriétés des “small world” pour améliorer la diffusion des informations dans le réseau. Dans les modèles de “small world” on réalise un recâblage des liens dans le réseau en changeant la taille et la direction des liens existants. Dans un environnement sans-fils autonome une organisation de ce type peut être créée en utilisant le flocking, l'inhibition latérale et le “beamforming”. Dans ce but, l'auteur utilise d'abord l'analogie avec l'inhibition latérale, le flocking et le “beamforming” pour montrer comment la diffusion des informations peut être améliorée. L'analogue de l'inhibition latérale est utilisé pour créer des régions virtuelles dans le réseau. Puis en utilisant l'analogie avec les règles du flocking, on caractérise les propriétés des faisceaux permettant aux nœuds de communiquer dans les régions. Nous prouvons que les propriétés des “small world” sont vérifiées en utilisant la mesure des moyennes des longueurs des chemins. Cependant l'algorithme proposé est valable pour les réseaux statiques alors que dans les cas introduisant de la mobilité, les concepts d'inhibition latérale et de flocking nécessiteraient beaucoup plus de temps. Dans le cas d'un réseau mobile la structure du réseau change fréquemment. Certaines connexions intermittentes impactent fortement la diffusion des informations. L'auteur utilise le concept de stabilité avec le “beamforming” pour montrer comment on peut améliorer la diffusion des informations. Dans son algorithme il prévoit d'abord la stabilité du nœud en utilisant des informations locales et il utilise ce résultat pour identifier les nœuds qui réaliseront du beamforming. Dans l'algorithme, les nœuds de stabilité faible sont autorisés à faire du beamforming vers les nœuds de forte stabilité. La frontière entre forte et faible stabilité est fixée par un seuil. Cet algorithme ne nécessite pas une connaissance globale du réseau, mais utilise des données locales. Les résultats sont validés en étudiant le temps au bout duquel plus de nœuds reçoivent l'information et en comparant avec d'autres algorithmes de la littérature. Cependant, dans les réseaux réels, les changements de structure ne sont pas dus qu'à la mobilité, mais également à des changements de la densité des nœuds à un moment donné. Pour tenir compte de l'influence de tels événements sur la diffusion des informations concernant la sécurité publique, l'auteur utilise les concepts de modèle de métapopulation, épidémiologiques, “beamforming” et mobilité géographique obtenu à partir de données D4D. L'auteur propose la création de trois états latents qu'il ajoute au modèle épidémiologique connu: SIR. L'auteur étudie les états transitoires en analysant l'évolution du nombre de postes ayant reçu les informations et compare les résultats concernant ce nombre dans les différents cas. L'auteur démontre ainsi que le scenario qu'il propose permet d'améliorer le processus de diffusion des informations. Il montre aussi les effets de différents paramètres comme le nombre de sources, le nombre de paquets, les paramètres de mobilité et ceux qui caractérisent les antennes sur la diffusion des informations
In public warning message systems, information dissemination across the network is a critical aspect that has to be addressed. Dissemination of warning messages should be such that it reaches as many nodes in the network in a short time. In communication networks those based on device to device interactions, dissemination of the information has lately picked up lot of interest and the need for self organization of the network has been brought up. Self organization leads to local behaviors and interactions that have global effects and helps in addressing scaling issues. The use of self organized features allows autonomous behavior with low memory usage. Some examples of self organization phenomenon that are observed in nature are Lateral Inhibition and Flocking. In order to provide self organized features to communication networks, insights from such naturally occurring phenomenon is used. Achieving small world properties is an attractive way to enhance information dissemination across the network. In small world model rewiring of links in the network is performed by altering the length and the direction of the existing links. In an autonomous wireless environment such organization can be achieved using self organized phenomenon like Lateral inhibition and Flocking and beamforming (a concept in communication). Towards this, we first use Lateral Inhibition, analogy to Flocking behavior and beamforming to show how dissemination of information can be enhanced. Lateral Inhibition is used to create virtual regions in the network. Then using the analogy of Flocking rules, beam properties of the nodes in the regions are set. We then prove that small world properties are achieved using average path length metric. However, the proposed algorithm is applicable to static networks and Flocking and Lateral Inhibition concepts, if used in a mobile scenario, will be highly complex in terms of computation and memory. In a mobile scenario such as human mobility aided networks, the network structure changes frequently. In such conditions dissemination of information is highly impacted as new connections are made and old ones are broken. We thus use stability concept in mobile networks with beamforming to show how information dissemination process can be enhanced. In the algorithm, we first predict the stability of a node in the mobile network using locally available information and then uses it to identify beamforming nodes. In the algorithm, the low stability nodes are allowed to beamform towards the nodes with high stability. The difference between high and low stability nodes is based on threshold value. The algorithm is developed such that it does not require any global knowledge about the network and works using only local information. The results are validated using how quickly more number of nodes receive the information and different state of the art algorithms. We also show the effect of various parameters such as number of sources, number of packets, mobility parameters and antenna parameters etc. on the information dissemination process in the network. In realistic scenarios however, the dynamicity in the network is not only related to mobility. Dynamic conditions also arise due to change in density of nodes at a given time. To address effect of such scenario on the dissemination of information related to public safety in a metapopulation, we use the concepts of epidemic model, beamforming and the countrywide mobility pattern extracted from the $D4D$ dataset. Here, we also propose the addition of three latent states to the existing epidemic model ($SIR$ model). We study the transient states towards the evolution of the number of devices having the information and the difference in the number of devices having the information when compared with different cases to evaluate the results. Through the results we show that enhancements in the dissemination process can be achieved in the addressed scenario
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Jacobs, Neil. « Scholarly Communication, the Information Chain and Technology : Analyses and Reflexions ». Thesis, Loughborough University, 2001. http://eprints.rclis.org/6802/1/thesis.pdf.

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It is no longer easy to adopt deterministic explanations of scholarly communication, technology or the information chain. Complex and reflexive relations have built up between the substantive and methodological literatures relevant to these topics. This thesis aims to explore these relations with reference to two sets of interviews, one with academic researchers and the other with information professionals. These interviews were conducted in 1998-9 during the FIDDO Project, a part of the UK Joint Information Systems Committee ‘Electronic Libraries Programme’. Two major theoretical perspectives are employed to support two analytic methodologies. The first is social constructivism, which is represented methodologically in the thesis by discourse analysis. The second is actor-network theory, which is represented methodologically by co-word analysis. Both of these approaches are engaged in questions of relativism and realism in social explanation. The implementation of each of the methodologies involves innovative moves. The discourse analysis is focused on personal deixis (self-reference) located by pronoun-use, and on interest management. The co-word analysis is adapted from a scientometric technique and supplemented by the use of categorical definitions of the three topics. Each methodology is employed to analyse both sets of interviews. The four resulting sets of findings are presented in terms of the boundaries apparent between the three topical concepts. The boundaries between scholarly communication, technology and the information chain are found to vary, for example according to the identities of the interviewees responsible for the data. They also vary according to the methodology employed. Discourse analysis of interviews with information professionals suggests that the idea of technology is deployed as a dual repertoire, consisting of empowerment and automation, and that the pattern of this deployment is one constituent of the contested boundaries between the three topics. Co-word analysis of the same interviews suggests that an important focus of the boundaries is around the idea of electronic journals. Discourse analysis of interviews with academic researchers also reveals use of the dual technology repertoire, but in addition suggests that the category of formal scholarly communication acts to legitimate the interests of researchers. Co-word analysis of the same interviews suggests that a number of models of document access were in play, including those based on the library, on paper and on documents. The implications of these substantive analyses include that studies based on ‘user needs’ or the ‘impact of technology’ could benefit from an analysis of how such topics are constructed in particular accounts. Finally, the question is addressed as to the extent that the results of the discourse and the co-word analyses (of the same data) are compatible so that they can be meaningfully synthesised. That is, do the two approaches give rise to outcomes that have similar epistemological status? The question is answered ‘empirically’ with reference to the issue of reflexivity as it is configured in the two approaches, and it is confirmed that the two types of outcome are not compatible due to profound differences in the positions adopted by their respective informing theories. The methodological implications of this include that those engaged in relativist research practice need to be aware the ways in which epistemological and reflexive issues are relevant to their actions.
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Medetov, Seytkamal. « Bio-inspired Approaches for Informatio Dissemination in Ad hon Networks ». Thesis, Belfort-Montbéliard, 2014. http://www.theses.fr/2014BELF0253/document.

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La dissémination d’information dans les réseaux VANET est une opération fondamentale pour la sécurité routière. Il est dès lors nécessaire de concevoir et mettre en oeuvre des algorithmes efficaces et adaptatifs pour la dissémination d’informations sélectives et pertinentes.Dans ce travail, des approches Bio-inspirées sont proposées, à partir des comportements auto-organisés des essaims comme les colonies de fourmis et d’abeilles. Ces approches visent à fournir à chaque véhicule des informations en provenance de son environnement et alerter les conducteurs. Dans la première approche, le système de communication direct et indirect des fourmis est utilisé. Les fourmis partagent les informations sur les sources de nourriture avec des membres de la colonie en sécrétant la phéromone sur leurs chemins. La deuxième approche est inspirée par le système de communication des abeilles. Les abeilles partagent les informations à propos des sources de nourriture avec les autres membres de la ruche par des messages spécifiques, selon l’importance de ces sources.Une nouvelle mesure de "pertinence" associée aux messages est définie, par analogie à la sécrétion des phéromones des fourmis et au niveau de l’intensité des messages pour les abeilles, pour disséminer des informations de sécurité dans une zone géographique. Les simulations sont effectuées en utilisant le simulateur NS2 pour mesurer l’efficacité des approches proposées sous différentes conditions, en particulier en termes de densités et vitesses des véhicules
Information dissemination in Vehicular Ad hoc Networks (VANETs) is a fundamental operation to increase the safety awareness among vehicles on roads. Thus, the design and implementation of efficient and scalable algorithms for relevant information dissemination constitutes a major issue that should be tackled.In this work, bio-inspired information dissemination approaches are proposed, that use self-organization principles of swarms such as Ant and Honey Bee colonies. These approaches are targeted to provide each vehicle with the required information about its surrounding and assist drivers to be aware of undesirable road conditions. In the first approach, Ant’s direct and indirect communication systems are used. Ants share information about food findings with colony members by throwing pheromone on the returning to the nest. The second, an RSU-based approach is inspired by the Bee communication system. Bees share profitable food sources with hive-mates in their hive by specific messages.A “relevance” value associated to the emergency messages is defined as an analogue to pheromone throwing in Ant colony, and as an analogue to profitability level in Bee colony, to disseminate safety information within a geographical area. Simulations are conducted using NS2 network simulator and relevant metrics are evaluated under different node speeds and network densities to show the effectiveness of the proposed approaches
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Wallace, Richard. « ETSU Medical Residents' Clinical Information Behaviors, Skills, Training, and Resource Use ». Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etd/2076.

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Information is a powerful tool for enabling physicians to provide quality healthcare for their patients. Information use in the clinic is a skill that must be learned. If medical residency programs fail to impart this skill, then patients will suffer. The residents of the ETSU Quillen College of Medicine were surveyed as to their use of clinical information. Of the 217 residents of the 2005-2006 class who were surveyed, 105 returned the survey for a return rate of 48%. The clinical faculty was also surveyed in order to measure the responses of the residents against that of their instructors. ETSU residents frequently had a new information need in the clinic. The majority of the time they did not seek an answer, but when they did they were often successful in finding an answer. Therapy information was the most frequently sought after type of information. Most residents used the Quillen College of Medicine Library, but not at a desirable rate. Residents stated that information obtained from the library was helpful in caring for their patients. The most frequent source of information used by residents was electronic resources and the greatest barrier to the use of information was time. The majority of residents were PDA users, with Palm devices being the primary platform. The residents rated their PDA skills and evidence-based medicine skills as above average. Few were LoansomeDoc users. The majority of residents received information training from clinical faculty and from librarians and rated it highly. Residents indicated a desire for more training and the majority indicated that they would like a clinical medical librarian for their program. They rated the library service of the Quillen College of Medicine and the area teaching hospitals highly. Residents used Google and the Web frequently. PubMed was rated as a valuable resource. Online journals and the UpToDate database were important electronic resources for the residents. ETSU residents have many excellent resources and training opportunities in place. However, for ETSU residents to go out into community practice as true "Infomasters" an upgrading of their information training should be undertaken.
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Henry, Didier. « Modèles de propagation de l'information et méthodes de sciences des données ». Thesis, Antilles, 2018. http://www.theses.fr/2018ANTI0323/document.

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De nos jours, les médias sociaux en ligne ont transformé notre façon de créer, de partager et d'accéder à l'information. Ces plateformes reposent sur de gigantesques réseaux favorisent le libre échange d'informations entre des centaines de millions de personnes à travers le monde entier, et cela de manière instantanée.Qu'ils soient en lien avec un évènement global ou en lien avec un évènement local, ces messages peuvent influencer une société et peuvent contenir des informations utiles pour la détection ou la prédiction de phénomènes du monde réel.Cependant, certains messages diffusés peuvent avoir un impact très négatif dans la vie réelle. Ces messages contenant une « infox » peuvent avoir des conséquences désastreuses.Pour éviter et anticiper ces situations dramatiques, suivre les rumeurs, éviter les mauvaises réputations, il est nécessaire d'étudier puis de modéliser la propagation de l'information.Or, la plupart des modèles de diffusion introduits reposent sur des hypothèses axiomatiques représentées par des modèles mathématiques. Par conséquent, ces modèles sont éloignés des comportements de diffusion des utilisateurs dans la mesure où ils n’intègrent pas les observations faites sur des cas concrets de diffusion. Dans nos travaux, nous étudions le phénomène de diffusion de l’information à deux échelles. À une échelle microscopique, nous avons observé les comportements de diffusion selon des traits de personnalité des utilisateurs en analysant les messages qu'ils publient en termes de sentiments et d'émotions. À une échelle macroscopique, nous avons analysé l'évolution du phénomène de diffusion en prenant en compte la dimension géographique des utilisateurs
Nowadays, online social media has transformed the way we create, share and access information. These platforms rely on gigantic networks that promote the free exchange of information between hundreds of millions of people around the world, and this instantly.Whether related to a global event or in connection with a local event, these messages may influence a society and may contain information useful for the detection or prediction of real-world phenomena.However, some broadcast messages can have a very negative impact in real life. These messages containing false information can have disastrous consequences.To avoid and anticipate these dramatic situations, follow rumors, avoid bad reputations, it is necessary to study and then model the propagation of information.However, most of the diffusion models introduced are based on axiomatic hypotheses represented by mathematical models. As a result, these models are far removed from the users' dissemination behaviors in that they do not incorporate observations made on concrete dissemination cases. In our work, we study the phenomenon of diffusion of information at two scales. On a microscopic scale, we observed diffusion behaviors based on the personality traits of users by analyzing the messages they post in terms of feelings and emotions. On a macroscopic scale, we analyzed the evolution of the diffusion phenomenon by taking into account the geographical dimension of the users
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Pampel, Heinz. « Universitätsverlage im Spannungsfeld zwischen Wissenschaft und Literaturversorgung. Eine kritische Bestandsaufnahme ». Thesis, Fachhochschulverlag Frankfurt am Main. Zugl. : Hochschule der Medien, Stuttgart, Diplomarbeit, 2006, 2007. http://eprints.rclis.org/9590/1/pampel.pdf.

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Departing from the serials crisis, this paper seeks to point out the areas of conflict, which are dominated by three principal agents: the scientific community, publishing houses and libraries. In order to facilitate interaction between these agents the open access movement has been formed, which receives considerable support from the librarianship. Abutted to the Anglo-American university presses, it has been postulated in the scientific community that German universities engage in publishing activities too. The focal point of this work is - apart from an assessment of the current situation and an overview of the Anglo-American university presses - a critical account of the German university press. On the basis of qualitative interviews different publishing houses are critically assessed in terms of their services offered. In a short excursus this paper describes subject-related publishing activities in the context of the open access movement. In conclusion this paper will expound the problems of German university presses – and formulate an outlook as to what may be the future course of the industry.
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Cubells, Puertes María José. « La classificació de la documentació parlamentària de Les Corts Valencianes : la funció de control al Consell ». Thesis, Universitat de València, 2008. http://eprints.rclis.org/14243/1/1_tesi.pdf.

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The aim of this thesis is to develop a framework for the classification of documents, as a basic tool for the records management system of the Valencian Parliament, with a view to facilitate the administrative management, the decision making and the retrieval of information.The methodology employed understands two stages: a review of the history of the Institution, its policies, procedure and function and, secondly, an actualised bibliographical review about the doctrine relative to the parliamentary control of government, and archival theories about document classification.The result is a functional table for document classification which is homogenous for the entire institution and allows adequate control, protection and records management, the standardization and simplification of procedure and the optimal exploitation of information from the Chamber.In conclusion, the system designed has been seen to be valid for the institution, achieving the expected goals in affording access to all users, including managers, politicians and researchers
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Brun, Philippe. « Conférence répartie en mode messagerie ». Saint-Etienne, 1987. http://tel.archives-ouvertes.fr/docs/00/94/12/02/PDF/1987_Brun_Philippe.pdf.

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Les conférences informatiques sont promises à un bel avenir. Toutefois, leur essor est freiné par le coût des communications, les difficultés inhérentes à ce type d'outils qui s'adressent à un grand nombre d'utilisateurs, mettent en jeu de grandes quantités d'informations et couvrent un large champ d'applications, et par la nécessité d'offrir aux usagers un accès simple, confortable et efficace. La solution que nous proposons répond à ces problèmes par les options suivantes. L'ensemble des messages échangés est archivé dans une structurée ce qui permet de les gérer efficacement. Cette base est dupliquée sur différents sites pour réduire les coûts de consultation. Les communications entre sites se font en mode messagerie telle qu'elle est recommandée par le CCITT. Pour une bonne coopération des usagers, des rôles sont définis, des droits leur sont associés. Enfin, l'interface avec l'utilisateur tire parti des progrès réalisés dans ce domaine tant dans le matériel que dans les logiciels actuellement disponibles.
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Boulland, Romain. « Trois essais en finance d'entreprise ». Thesis, Paris 9, 2013. http://www.theses.fr/2013PA090049.

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Les investisseurs n’exploitent pas toujours toute l’information disponible lorsqu’ils prennent des décisions, en raison à la fois d’une surabondance de l’information et de capacités cognitives limitées. Le premier essai de cette thèse montre que les sociétés tirent parti de l’inattention des investisseurs en communiquant plus ou moins longtemps à l’avance la date à laquelle aura lieu les annonces de résultats. Des résultats positifs sont notifiés très en amont tandis que des résultats décevants font l’objet d’un délai de notification plus court. Le second essai traite de la visibilité internationale des sociétés et étudie l’impact d’une communication en anglais via des canaux de diffusion à grande échelle. Cette diffusion plus large augmente l’attention des investisseurs et les informations contenues dans les annonces de résultat sont plus rapidement intégrées dans le prix des titres. Le troisième essai traite des conséquences d’une visibilité accrue des sociétés sur leur politique d’investissement. Une diffusion élargie des informations financières améliore à la fois l’environnement informationnel des sociétés et l’efficacité de leur politique d’investissement
Investors often fail to incorporate all relevant information when they make decisions. This is a consequence of both information overload and investors’ limited cognitive abilities. The first essay shows that firms take advantage of investors’ inattention by managing the advance notice period of earnings announcements. Firms notify the date of positive earnings announcement several weeks in advance while disappointing earnings are notified at late notice. The second essay deals with firms’ international visibility and studies how communicating on English-speaking wire services impacts investors’ attention. Higher dissemination of news increases investors’ attention and improves the incorporation of information into stock prices. The third essay deals with the effects of firms’ visibility on investment policy. It shows that higher dissemination of disclosures improves firms’ informational environment and investment efficiency
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Abiza, Yamina. « Personnalisation de la distribution et de la présentation des informations des bases de vidéo interactive diffusées ». Nancy 1, 1997. http://www.theses.fr/1997NAN10249.

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Notre thèse traite des problèmes de la conception et de la personnalisation des applications de bases de documents de vidéo interactive dans les services d'information multimédia résidentiels émergents (télévision interactive et télématique de deuxième génération). Plus précisément nous nous intéressons aux services d'information dits "server push" où les sources d'information sont dynamiques, distribuées, et destinées à être diffusées dans des environnements hétérogènes, à ressources partagées, et à utilisateurs ayant des besoins d'information individuel différents. Dans ce contexte, il y a plusieurs aspects à personnaliser. Nous nous centrons ici sur deux problèmes particuliers : le filtrage d'information basé sur les critères de structure des documents et l'adaptation des modalités de présentation des contenus. Ces deux problèmes sont liés à la conception de la base d'information. Notre approche de la personnalisation est basée sur la définition d'un modèle conceptuel de données, HB_Model, qui comporte un modèle de données de base pour la représentation des structures des documents de vidéo interactive, un modèle HB_Views et un modèle HB_Views et un modèle HB_Versions. HB_Yiews offre un mécanisme de vues pour le filtrage automatique basé sur la structure hypermédia et la sémantique associée dans les applications étudiées. HB_Versions est un modèle de représentation et de structuration d'objets simples multiversions du modèle de base, adapté aux besoins spécifiques de la personnalisatons des modalités de présentation des contenus des documents. Ce modèle permet la spécification en intention des configurations, cohérentes et adaptatives, des modalités de présentation des contenus suivant les contraintes dynamiques du contexte d'interaction et de présentation - sous la forme d'un CSP (Constraints Satisfaction Problem). Pour terminer, nous montrons comment nos propositions s'articulent et s'insèrent dans l'architecture fonctionnelle et opérationnelle d'un service d'information de vidéo interactive diffusé et personnalisé
In this thesis we deal with the issues of the design and personalization of data-oriented interactive video applications (i. E. Multimedia/hypermedia documents applications with predominance of audio and video data) in the emerging residential multimedia informatoin services (i. E. Interactive television and second generation telematics) More specifically, we are concerned with the server-push information services (i. E. Distributed dynamic and broadcast information sources) to be deployed in heteroyenous environments with shared ressources and destinated to users having different information needs and preferences. In this context, they are a lot of possible aspects to personalize. Here we focus on two particular related aspects : structure-based information filtering and personalization of contents presentation modalities. The techniques to achieve these personalization aspects are tightly related to the design of a given information source. Our approach to personalization is based on the definition of a conceptual data model, HB_Model, composed of : 1) a base model to represent documents organization and internal structure in video interactive sources, 2) a versionning model, HB_Versions, to represents documents contents with multiple alternative representation forms or modalities, and 3) a model for wiews definition, HB_Views, to represent relatively stable users information needs. Personalized information delivery from a given server - based on structure criteria - is archived by the materialization of individual users' views specifications using newly available information on this server. Personalization of contents representation modalitics is archived by the intentional specification of documents contents configuration in the form of a CSP (Constraint Satisfaction Problem) which reflects the constraints of the interaction and presentation contexts caracteristics on the choice of the presentation modality for each content and garantees the coherence of presentation modalities combinations. Finally, we show how our propositions articulate and fit into the architecture of a personalized, server-push interactive video information service
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Livres sur le sujet "Information dissemination and diffusion"

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Pinelli, Thomas E. NASA/DoD aerospace knowledge diffusion research project : summary report to phase 1 respondents. Hampton, Va : Langley Research Center, 1991.

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Pinelli, Thomas E. NASA/DoD aerospace knowledge diffusion research project : summary report to phase 3 faculty and student respondents including frequency distributions. Hampton, VA : Langley Research Center, 1991.

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Morrison, Elizabeth W. NASA/DoD Aerospace Knowledge Diffusion Research Project. : Results of an initial investigation. [Washington, D.C.] : National Aeronautics and Space Administration, 1996.

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E, Pinelli Thomas, et United States. National Aeronautics and Space Administration., dir. NASA/DoD Aerospace Knowledge Diffusion Research Project. : Results of an initial investigation. [Washington, D.C.] : National Aeronautics and Space Administration, 1996.

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Murphy, D. NASA/DoD aerospace knowledge diffusion research project. [Washington, DC] : National Aeronautics and Space Administration, 1994.

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United States. National Aeronautics and Space Administration. et United States. Dept. of Defense., dir. NASA/DoD aerospace knowledge diffusion research project. [Washington, DC] : National Aeronautics and Space Administration, 1994.

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Murphy, D. NASA/DoD aerospace knowledge diffusion research project. [Washington, DC] : National Aeronautics and Space Administration, 1994.

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Murphy, D. NASA/DoD aerospace knowledge diffusion research project. [Washington, DC] : National Aeronautics and Space Administration, 1994.

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Pinelli, Thomas E. Aerospace knowledge, diffusion research project. [Washington, DC] : National Aeronautics and Space Administration, 1996.

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O, Barclay Rebecca, Kennedy John M et United States. National Aeronautics and Space Administration., dir. Aerospace knowledge, diffusion research project. [Washington, DC] : National Aeronautics and Space Administration, 1997.

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Chapitres de livres sur le sujet "Information dissemination and diffusion"

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Grover, Purva, et Arpan Kumar Kar. « “#Government” - Understanding Dissemination, Transparency, Participation, Collaboration and Engagement on Twitter for Citizens ». Dans Re-imagining Diffusion and Adoption of Information Technology and Systems : A Continuing Conversation, 365–76. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-64849-7_33.

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Vieri, Marco, Daniele Sarri, Sofia Matilde Luglio et Carolina Perna. « Didattica immersiva nell’Ingegneria Agraria. Un caso d’uso nel Laboratorio di Agricoltura Digitale e di Alta Tecnologia ». Dans Studi e saggi, 103–8. Florence : Firenze University Press, 2022. http://dx.doi.org/10.36253/978-88-5518-646-9.13.

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The chapter describes experiences of 360° videos use by the Agrismart Lab Group of the University of Florence. The Agrismart Lab Group focuses on the technological transfer of information obtained during the research phase to provide the greatest possible diffusion and dissemination of discoveries regarding the technological-digital revolution in the agricultural sector. Dissemination, applications, and teaching are the main outcomes of our research activities, and we have fully utilized the SEPA360 project's resources. In particular, the student will be able to see smart farming examples both in the field and in the immersive teaching lab having clearer theoretical notions by 360° viewers. Two case studies (tractor 4.0 and Agrobot) are included in the interactive videos, which are utilized both for learning and verification.
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Li, Jun, Peter Reiher et Gerald J. Popek. « Dissemination Procedure ». Dans Advances in Information Security, 47–66. Boston, MA : Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-1021-5_4.

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Nayate, Amol, Mike Dahlin et Arun Iyengar. « Transparent Information Dissemination ». Dans Middleware 2004, 212–31. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30229-2_12.

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Shek, Eddie C., Son K. Dao et Darrel J. Van Buer. « Information Dissemination Applications ». Dans Internetworking and Computing Over Satellite Networks, 239–59. Boston, MA : Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0431-3_10.

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Smiraglia, Richard P. « Gatekeepers : Information Dissemination ». Dans Cultural Synergy in Information Institutions, 47–55. New York, NY : Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1249-0_6.

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Göseke, Christian. « Information Networks ». Dans Information Gathering and Dissemination, 135–73. Wiesbaden : Deutscher Universitätsverlag, 1997. http://dx.doi.org/10.1007/978-3-663-08564-5_5.

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Ingram, W. Ludwig. « ICAITI’S Dissemination Activities of Biogas Systems ». Dans Biogas Technology, Transfer and Diffusion, 166–70. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4313-1_22.

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Turau, Volker. « Stateless Information Dissemination Algorithms ». Dans Structural Information and Communication Complexity, 183–99. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54921-3_11.

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Yang, Zhengwei, Ada Wai-Chee Fu, Yanyan Xu, Silu Huang et Ho Fung Leung. « Community Based Information Dissemination ». Dans Lecture Notes in Computer Science, 220–31. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19548-3_18.

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Actes de conférences sur le sujet "Information dissemination and diffusion"

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Naqvi, Syed, et Hafedh Al-Shihi. « M-Government Services Initiatives in Oman ». Dans InSITE 2009 : Informing Science + IT Education Conference. Informing Science Institute, 2009. http://dx.doi.org/10.28945/3389.

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Information technology and communications have now become the main elements that move forward and help Oman in its national development process. Internet penetration in most developing countries like Oman is still low as oppose to mobiles dissemination, despite the government plans and strategies to enhance internet diffusion. Internet subscribers comprised about 2.5% of the general population of Oman. In contrast, the number of mobile holders increased substantially since the launch of these services in 1996. Prepaid mobile services and SMS were introduced in 2001 and both are currently popular with subscribers. Such fine appeal influenced many government organizations to go mobile with their services. This paper reviewed the ICT sector and the current m-government initiatives in Oman setting up the mobile services and aimed to understand the key factors to adoption and diffusion of these services.
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Barbosa, Carlos, Lucas Félix, Vinícius Vieira et Carolina Xavier. « Sara - A Semi-Automatic Framework for Social Network Analysis ». Dans XXV Simpósio Brasileiro de Sistemas Multimídia e Web. Sociedade Brasileira de Computação - SBC, 2019. http://dx.doi.org/10.5753/webmedia_estendido.2019.8137.

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Understanding the dissemination of information in social networks has become essential for modern societies. These networks have dramatically changed the mode of communication, relationship, marketing, and access to information. Platforms such as Twitter, and WhatsApp are some representatives of these new information propagation media that represented a major shift in a model centered on traditional communication vehicles. This new decentralized environment gave voice to marginalized groups, riots such as the Arab Spring, growth of populist parties and false news waves across the globe. Therefore, considering the influence of these platforms in several aspects of society, this work presents a framework for characterizing the diffusion of information in social networks, especially on Twitter. This characterization is accomplished through the use of complex network and text mining techniques, exploring the generation of a retweets network, the formation of communities around specific users, cascades of information, analysis of feelings and modeling of topics. As an evaluation this model is applied in characterizing a network of retweets generated around the discussion of pension reform of Brazil on Twitter.
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Silva, Samuel O., Bruno O. Goulart, Maria Júlia M. Schettini, Carolina Xavier et João Gabriel Silva. « Estudo comparativo de métricas de ranking em Redes Sociais ». Dans Encontro Nacional de Computação dos Institutos Federais. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/encompif.2020.11068.

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The use of modeling and application of complex networks in several areas of knowledge have become an important tool for understanding different phenomena; among them some related to the structures and dissemination of information on social medias. In this sense, the use of a network's vertex ranking can be applied in the detection of influential nodes and possible foci of information diffusion. However, calculating the position of the vertices in some of these rankings may require a high computational cost. This paper presents a comparative study between six ranking metrics applied in different social medias. This comparison is made using the rank correlation coefficients. In addition, a study is presented on the computational time spent by each ranking. Results show that the Grau ranking metric has a greater correlation with other metrics and has low computational cost in its execution, making it an efficient indication in detecting influential nodes when there is a short term for the development of this activity.
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Santos, Mariana Bastos Rodrigues dos, Felipe dos Santos Souza, Pedro Felisberto Nogueira Viana Farah, Yasmim Evelyn Lisboa Barbosa et Felipe Oliveira Costa. « Early diagnosis of RelapsingRemitting Multiple Sclerosis : a review of the bibliography from 2016 to 2021 ». Dans XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.203.

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Background: Multiple Sclerosis (MS) is a neurodegenerative disease of the Central Nervous System (CNS), which damages myelin and axons by interrupting or reducing the flow of information. Early diagnosis of MS is essential to slow disease progression. The last review of the McDonald criteria, which organize the diagnosis of MS, took place in 2017 and it is necessary to understand the evidence that emerged in this period. Objectives: Review the updates of the bibliography published between 2016 and 2021. Design and setting: Bibliographic review made in Rio de Janeiro, Brazil. Methods: This research was made from Pubmed database search with the descriptors “Multiple Sclerosis Relapsing-Remitting” and “Early Diagnosis” and the filters “free full text”, “english”, “Portuguese”, “5 years”, “humans”. The discarded articles did not contemplate the entire theme in the design, content or quality of publication. Results: Patients with the first clinical event suggesting MS that meet the criteria for space dissemination may be diagnosed with relapsing-remitting multiple sclerosis (RRMS) when oligoclonal bands in the cerebrospinal fluid are detected, while other methods such as infrared spectroscopy and diffusion tensor tractography still show many concomitant signs among the varieties of MS. Conclusions: Cerebrospinal fluid analysis is the most sensitive criterion for early diagnosis of RRMS.
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Abu-Baker, Amjad, Hong Huang, Eric Johnson et Satyajayant Misra. « Green Diffusion : Data dissemination in sensor networks using solar power ». Dans 2011 IEEE Consumer Communications and Networking Conference (CCNC). IEEE, 2011. http://dx.doi.org/10.1109/ccnc.2011.5766603.

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Gunasekaran, Raghul, Mallikarjun Shankar, Dieter Gawlick, Steve Fisher, Aravind Yalamanchi, Ronny Fehling et Hairong Qi. « INFOrmation Dissemination (INFOD) middleware ». Dans the Third ACM International Conference. New York, New York, USA : ACM Press, 2009. http://dx.doi.org/10.1145/1619258.1619317.

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Kuhn, Fabian. « Session details : Information dissemination ». Dans PODC '11 : ACM Symposium on Principles of Distributed Computing. New York, NY, USA : ACM, 2011. http://dx.doi.org/10.1145/3253076.

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Kantelis, Konstantinos, Georgios Papadimitriou, Petros Nikopolitidis, Ioannis Vlahavas, Olga Tsave et Athanasios Salifoglou. « Message dissemination dynamics in biological communication systems : A reaction-diffusion approach ». Dans 2017 24th International Conference on Telecommunications (ICT). IEEE, 2017. http://dx.doi.org/10.1109/ict.2017.7998265.

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Jeong, Youngmin, Hyundong Shin et Moe Z. Win. « Information dissemination in MIMO networks ». Dans GLOBECOM 2012 - 2012 IEEE Global Communications Conference. IEEE, 2012. http://dx.doi.org/10.1109/glocom.2012.6503820.

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« Information Dissemination in Social Networks ». Dans International Conference on Agents and Artificial Intelligence. SCITEPRESS - Science and and Technology Publications, 2014. http://dx.doi.org/10.5220/0004917202670271.

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Rapports d'organisations sur le sujet "Information dissemination and diffusion"

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Cuesta-Valiño, Pedro. Happiness Management. A Social Well-being multiplier. Social Marketing and Organizational Communication. Sous la direction de Rafael Ravina-Ripoll. Editorial Universidad de Sevilla, 2022. http://dx.doi.org/10.12795/2022.happiness-management.

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On behalf of the Happiness University Network, we are pleased to present here an extract of the information concerning the universities working to generate the diffusion of this network. Specifically, with the support of the University of Salamanca and the Pontifical University of Salamanca the aim is to create a friendly and working environment for the dissemination and discussion of the latest scientific and practical developments in the fields of happiness economics, corporate wellbeing, happiness management and organisational communication. It also offers an opportunity for productive encounters, the promotion of collaborative projects and the encouragement of international networking. Below you will find papers related to: Economics of happiness, happiness management, organisational communication, welfare state economics, consumer happiness, leadership, social marketing, happiness management and SDGs, happiness management in human resource strategies, learning and competencies in happiness management, learning and competencies in social well-being, measurement and indicators of happiness and well-being and history of welfare economics.
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Vitto, Vincent. Managed Information Dissemination. Fort Belvoir, VA : Defense Technical Information Center, octobre 2001. http://dx.doi.org/10.21236/ada386520.

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Kallurkar, Srikanth. Targeted Information Dissemination. Fort Belvoir, VA : Defense Technical Information Center, mars 2008. http://dx.doi.org/10.21236/ada479670.

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Ted J. Clutter. Geothermal Information Dissemination and Outreach. Office of Scientific and Technical Information (OSTI), février 2005. http://dx.doi.org/10.2172/881755.

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George Kervitsky, Jr. Hydrogen Technical Analysis -- Dissemination of Information. Office of Scientific and Technical Information (OSTI), mars 2006. http://dx.doi.org/10.2172/900480.

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Dr. John W. Lund. Geothermal Energy Information Dissemination and Outreach. Office of Scientific and Technical Information (OSTI), décembre 2005. http://dx.doi.org/10.2172/878452.

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Fabregas, Raissa, Michael Kremer, Jon Robinson et Frank Schilbach. Evaluating agricultural information dissemination in western Kenya. International Initiative for Impact Evaluation (3ie), décembre 2017. http://dx.doi.org/10.23846/tw4.ie67.

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Fabregas, Raissa, Michael Kremer, Jon Robinson et Frank Schilbach. Evaluating agricultural information dissemination in western Kenya. International Initiative for Impact Evaluation, février 2018. http://dx.doi.org/10.23846/tw41011.

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Innis, S. Community Based Approach to Wind Energy Information Dissemination. Office of Scientific and Technical Information (OSTI), septembre 2003. http://dx.doi.org/10.2172/839350.

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Thomas, Cathy H. The Dissemination of Terrorist Threat Information : Who Should Be Warned. Fort Belvoir, VA : Defense Technical Information Center, mai 1990. http://dx.doi.org/10.21236/ada220703.

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