Relevant bibliographies by topics / Failed agent

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  1. Journal articles
  2. Dissertations / Theses
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  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Failed agent'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Failed agent"

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Veritti, Daniele, Paolo Lanzetta, Francesco Bandello, and Raffaella Gortana Chiodini. "VISCOELASTIC AGENT RETENTION AND FAILED MACULAR HOLE SURGERY." Retinal Cases & Brief Reports 3, no. 1 (2009): 77–79. http://dx.doi.org/10.1097/icb.0b013e318158de4f.

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Kumar, Anurup. "Capnocytophaga canimorsus Meningitis – Diagnosis with 16S rDNA PCR when Conventional Methods Failed to Identify the Causative Agent." Clinical Research and Clinical Trials 3, no. 4 (2021): 01–06. http://dx.doi.org/10.31579/2693-4779/025.

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Meningitis whether bacterial or viral, poses many challenges to clinicians as the causative agent is often not found. According to guidelines, it is standard to start empiric treatment before a Cerebrospinal Fluid (CSF) sample is obtained. Meningitis, if not diagnosed and treated early, can lead to high morbidity and mortality rates with serious neurological sequelae. While the most common cases of bacterial meningitis are related to Streptococcus pneumoniae and Neisseria meningitidis, this clinical case report found a rare case of meningitis caused by a zoonotic pathogen, Capnocytophaga canimorsus; a commensal found as part of the normal flora of dogs and cats. This rare organism was identified with the help of broad range 16S ribosomal DNA Polymerase Chain Reaction (rDNA PCR), an emerging technique that is now increasingly useful in rapid diagnosis especially if the offending agent is not timely identified and conventional methods have failed, making diagnosis and management difficult for physicians.
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Agostino, Nicole M., Rebecca Gingrich, and Joseph J. Drabick. "Bevacizumab Demonstrates Prolonged Disease Stabilization in Patients with Heavily Pretreated Metastatic Renal Cell Carcinoma: A Case Series and Review of the Literature." Advances in Urology 2010 (2010): 1–4. http://dx.doi.org/10.1155/2010/687043.

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There are now a variety of therapies approved for the treatment of metastatic renal cell carcinoma (RCC). These include the immunotherapeutics, alfa-interferon, and interleukin-2, and agents that target the vascular endothelial growth factor receptor (VEGFR) via its tyrosine kinase, such as sorafenib, sunitinib, and pazopanib, or the mammalian target of rapamycin (mTOR), such as temsirolimus and everolimus. Bevacizumab, a monoclonal antibody directed against the ligand, VEGF, has shown activity against RCC as a single agent in patients who had failed prior cytokine therapy and as first line therapy in combination with interferon. The activity of bevacizumab in patients who had received and failed prior therapy has not been described. We report our experience in 4 patients with metastatic RCC who had failed prior cytokine, TKI, and mTOR inhibitors who were treated with bevacizumab as single agent therapy. These heavily pretreated patients sustained very prolonged periods of stable disease (median of 12 months) with very little toxicity and excellent quality of life. The activity of this agent in patients who had failed prior therapies directed against the VEGFR and mTOR suggests that therapy targeting the ligand, VEGF, is still a viable approach in these patients and deserves further study.
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Peacock, David, and Ian Abbott. "The mongoose in Australia: failed introduction of a biological control agent." Australian Journal of Zoology 58, no. 4 (2010): 205. http://dx.doi.org/10.1071/zo10043.

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We reviewed historical literature and obtained nearly 200 records of the mongoose in Australia up to 1942. Although the earliest importations (from 1855) were for its snake-killing prowess, often as entertainment, its perceived potential as a control agent for the European rabbit (Oryctolagus cuniculus) plague saw concerted introductions made in New South Wales, Victoria and South Australia, primarily in 1883 and 1884. At least 1000 mongoose were released to control rabbits at 14 reported release locations in these states. As many as 700 of these mongoose were reported released in one New South Wales rabbit-control trial. These numbers indicate that insufficient propagule pressure does not explain why Australia escaped the additional devastation of an established mongoose population. The only reason stated for the failure of the mongoose releases to control rabbits is destruction of the mongoose by rabbit trappers, both inadvertently and in seeking to protect their employment. Unfavourable climate was implicated by CLIMATCH modelling in the failure of all releases, especially those into semiarid areas such as western New South Wales. No contemporary detail could be located of the reported 1884 failed introduction of ‘numbers’ of mongoose into North Queensland to control rats in sugarcane plantations.
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Hartline, Jason D. "Approximation in Mechanism Design." American Economic Review 102, no. 3 (2012): 330–36. http://dx.doi.org/10.1257/aer.102.3.330.

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This paper considers three challenge areas for mechanism design and describes the role approximation plays in resolving them. Challenge 1: optimal mechanisms are finely tuned to precise details of the distribution on agent preferences. Challenge 2: in environments with multi-dimensional agent preferences economic analysis has failed to provide general characterizations optimal mechanisms. Challenge 3: optimal mechanisms are parameterized by unrealistic knowledge of the distribution of agents' private preferences. This paper surveys positive resolutions to these challenges with emphasis on basic techniques and their relevance to theory and practice.
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Okun, Ilya, Sergei Malarchuk, Elena Dubrovskaya, et al. "Screening for Caspase-3 Inhibitors: Effect of a Reducing Agent on Identified Hit Chemotypes." Journal of Biomolecular Screening 11, no. 6 (2006): 694–703. http://dx.doi.org/10.1177/1087057106289231.

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When studying cysteinyl proteases in general and caspases in particular, it is generally accepted that a reaction buffer must contain a reducing agent to prevent essential cysteinyl groups from spontaneous oxidation. Dithiothreitol (DTT) and β-mercaptoethanol (β-MCE) are 2 of the most broadly used reducing agents. While screening a library of small molecules against caspase-3, the authors have found that the nature of the reducing agent used, DTT or β-MCE, dramatically affects screening results and leads to identification of nonoverlapping hits. Screening in DTT-containing buffer revealed few novel classes of small molecules that selectively and reversibly inhibit caspase-3 but failed to identify isatin sulfonamides recently found to be potent and selective caspase-3 inhibitors (false negatives). On the other hand, screening in the presence of β-MCE failed to identify a series of hit compounds, 1,3-dioxo-2,3-dichloro-1 H-pyrrolo[3,4- c]quinolines, discovered with DTT, whereas isatin sulphonamides in these conditions exhibited strong caspase-3 inhibition. In this work, the authors show that thiol-containing reducing agents can affect catalytic activity of caspase-3 and modify its thermostability in a redox-potential-independent manner. The authors speculate that the differential structural modifications of caspase-3 seen with different reducing agents represent structurally different caspase-3 conformations and are responsible for its differential sensitivity to small molecules of different chemotypes. Hence, selection of the reducing agent may dramatically affect the quality of high-throughput screening campaigns.
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Honda, Yuko, Taketoshi Furugohri, and Yoshiyuki Morishima. "Tranexamic Acid Failed to Reverse the Anticoagulant Effect and Bleeding by an Oral Direct Factor Xa Inhibitor Edoxaban." Pharmacology 101, no. 1-2 (2017): 92–95. http://dx.doi.org/10.1159/000484172.

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Background/Aims: Agents to reverse the anticoagulant effect of edoxaban, an oral direct factor Xa inhibitor, would be desirable in emergency situations. The aim of this study is to determine the effect of tranexamic acid, an antifibrinolytic agent, on the anticoagulant activity and bleeding by edoxaban in rats. Methods: A supratherapeutic dose of edoxaban (3 mg/kg) was intravenously administered to rats. Three minutes after dosing, tranexamic acid (100 mg/kg) was given intravenously. Bleeding was induced by making an incision with a blade on the planta 8 min after edoxaban injection and bleeding time was measured. Prothrombin time (PT) and clot lysis were examined. Results: A supratherapeutic dose of edoxaban significantly prolonged PT and bleeding time. Tranexamic acid did not affect PT or bleeding time prolonged by edoxaban, although tranexamic acid significantly inhibited clot lysis in rat plasma. Conclusion: An antifibrinolytic agent tranexamic acid failed to reverse the anticoagulant effect and bleeding by edoxaban in rats.
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Nguyen, Duc Thien, William Yeoh, Hoong Chuin Lau, and Roie Zivan. "Distributed Gibbs: A Linear-Space Sampling-Based DCOP Algorithm." Journal of Artificial Intelligence Research 64 (March 14, 2019): 705–48. http://dx.doi.org/10.1613/jair.1.11400.

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 Researchers have used distributed constraint optimization problems (DCOPs) to model various multi-agent coordination and resource allocation problems. Very recently, Ottens et al. proposed a promising new approach to solve DCOPs that is based on confidence bounds via their Distributed UCT (DUCT) sampling-based algorithm. Unfortunately, its memory requirement per agent is exponential in the number of agents in the problem, which prohibits it from scaling up to large problems. Thus, in this article, we introduce two new sampling-based DCOP algorithms called Sequential Distributed Gibbs (SD-Gibbs) and Parallel Distributed Gibbs (PD-Gibbs). Both algorithms have memory requirements per agent that is linear in the number of agents in the problem. Our empirical results show that our algorithms can find solutions that are better than DUCT, run faster than DUCT, and solve some large problems that DUCT failed to solve due to memory limitations.
 
 
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Serudji, Joserizal, Rika Effendy, and Hafni Bachtiar. "PERBEDAAN RERATA KADAR IL-6 SERUM MATERNAL BERDASARKAN KEBERHASILAN PEMBERIAN TOKOLITIK PADA PARTUS PREMATURUS IMMINENS." JOURNAL OBGIN EMAS 1, no. 1 (2019): 15–21. http://dx.doi.org/10.25077/aoj.1.1.15-21.2017.

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Preterm labor needs to be prevented, one of the prevention methods is by tocolytic administration which could prevent labor thus providing a chance for lung maturation. Preterm Pregnancy is associated with increased concentrations of cytokines such as Interleukin (IL). The increasing concentration of maternal serum IL-6 can be used to predict preterm labor. This research uses the design Cross-Sectional Comparative to determine differences in means of maternal serum levels of IL-6 based on the success of the administration of a tocolytic agent on preterm labor. This study was performed on pregnant women who come to the obstetric emergency room of DR. MA. Hanafiah Batusangkar Hospital within August-November 2015. The total number which was included in statistical analysis was 34 pregnant women which were divided into 2 groups, 17 people in the group of patients who failed in tocolytic agent administration, and 17 people in the group who success in managed with a tocolytic agent. Statistical analysis was performed to analyze the validity using the T-test. There are significant differences in the average rate of maternal serum IL-6 in patients who failed to treat with a tocolytic agent and successful to treat with a tocolytic agent. Seen from the p-value 0.000. Levels of maternal serum IL-6 in patients who failed to treat with a tocolytic agent were higher than successful to treat with a tocolytic agent.Keywords: IL-6, Tocolytic, Preterm labor
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Lee, Ha Na, Young-Suk Lee, Ji-Yeon Han, Jae Yong Jeong, Myung-Soo Choo, and Kyu-Sung Lee. "Transurethral injection of bulking agent for treatment of failed mid-urethral sling procedures." International Urogynecology Journal 21, no. 12 (2010): 1479–83. http://dx.doi.org/10.1007/s00192-010-1224-z.

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Dissertations / Theses on the topic "Failed agent"

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Chakchouk, Fadoua. "Contribution à la robustesse dans les CSPs distribués par réplication locale." Thesis, Valenciennes, 2018. http://www.theses.fr/2018VALE0039/document.

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Nous visons à garantir la résolution d’un DisCSP en présence d’un ou plusieurs agents défaillants. Les méthodes traitant la tolérance aux fautes au sein des SMAs visent la continuité du fonctionnement du système. Mais, aucune de ces méthodes n’est appliquée pour résoudre un DisCSP. La défaillance d’un agent au cours de la résolution d’un DisCSP engendre la perte d’une partie du DisCSP global, d’où l’obtention d’un résultat erroné. Donc pour obtenir les résultats attendus, il faut garantir la résolution du CSP local de l’agent défaillant. Nous proposons de répliquer les CSPs locaux des agents défaillants au sein des agents non défaillants. Cette réplication permet la résolution du CSP local de l’agent défaillant par un autre agent. Cette résolution est effectuée en fusionnant les réplicats de CSPs des agents défaillants avec les CSPs des autres agents. Cette fusion permet la conservation de la modélisation initiale du DisCSP. L’algorithme de distribution des réplicats proposé garantit que les CSPs des agents défaillants ne soient pas répliqués au sein du même agent. De cette façon, le problème conserve son aspect distribué<br>We aim to ensure a DisCSP resolution in presence of failed agents. Methods handling fault tolerance in MASs aim to ensure the continuity of the system operation. But, none of these methods are applied to solve a DisCSP. The failure of an agent generates the loss of a part of the DisCSP providing wrong results. Therefore, to obtain expected results, it is necessary to ensure the resolution of the failed agent local CSP.We propose to replicate the local CSPs of the failed agents within active agents. This replication allows local CSP resolution of the failed agent by another agent. The resolution is done by merging the replicates of failed agents CSPs with the CSPs of other agents. This technique conserve the initial DisCSP modeling. The proposed replicates distribution algorithm ensures that the CSPs of failed agents are not replicated within the same agent. In this way, the problem keeps its distributed aspect
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Chapaux, Vincent. "Dominer par les idées: étude de la notion de Failed State." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209954.

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Depuis la fin de la guerre froide, la notion de Failed State est utilisée dans les relations internationales pour décrire des États rencontrant des difficultés à exercer un monopole de la violence légitime sur leur territoire. La thèse se pose la question de savoir dans quelle mesure cette notion a pu jouer un rôle dans les rapports de domination en cours dans les relations internationales. L’étude montre que la notion a été créée par un communauté épistémique et des entrepreneurs de sens avant tout américains et proposait en effet un système de représentation selon lequel le salut des Failed State reposerait avant tout sur la mise en place de politiques très intrusives de la part des États les plus puissants de la planète. L’étude poursuit en montrant que ce système de représentation, créé à grands frais par un ensemble d’acteurs académiques, médiatiques et philanthropiques, n’a toutefois pas toujours réussi à justifier la mise en place des politiques intrusives souhaitées. A travers de nombreuses études de cas (Afghanistan, Haïti, Irak, Somalie, Palestine, Liban, Libéria, Soudan, Zimbabwe, Bolivie, Pakistan, Colombie, Burundi, Sierra Leone, Guinée-Bissau et République centrafricaine), le travail démontre que la notion de Failed State n’a pas toujours eu l’efficacité souhaitée et a au contraire été détournée, parfois avec succès, pour résister aux politiques perçues comme intrusives par des acteurs prétendument dominés. L’étude conclut que si il est théoriquement possible de dominer par les idées, il est aussi possible de résister aux idées par les idées.<p>//<p>Since the end of the Cold War, the notion of Failed State is used in international relations in order to describe States that have difficulties to exercise a monopoly of legitimate violence on their territory. The thesis raises the question of how this concept influenced the relations of domination in the international relations. The study shows that the concept of Failed State was created by an epistemic community and a group of entrepreneurs primarily based in the United States. The notion promoted a system of representation based on the idea that the salvation of the Failed States rested on their acceptance of very intrusive policies leaded by the most powerful States of the world. The study also shows that this representation system, created at great expense, has not always been able to justify the intrusive policies it was designed to legitimize. Through numerous case studies (Afghanistan, Haiti, Iraq, Somalia, Palestine, Lebanon, Liberia, Sudan, Zimbabwe, Bolivia, Pakistan, Colombia, Burundi, Sierra Leone, Guinea-Bissau and Central African Republic), it is shown that notion of Failed State has not always reached the efficiency desired by its creators and has instead been used, sometimes successfully, to resist policies perceived as intrusive by the allegedly “dominated” actors. The study concludes that while it is theoretically possible to rule with ideas, it is also possible to resist ideas with ideas.<br>Doctorat en Sciences politiques et sociales<br>info:eu-repo/semantics/nonPublished
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Johansson, Andrea. "Hardened hearts : Are the Swedish people being failed as moral agents by Swedish authorities during the COVID-19 pandemic?" Thesis, Umeå universitet, Institutionen för idé- och samhällsstudier, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184570.

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Almost since the start of the COVID-19 pandemic, Sweden has been criticised for doing too little to stop the spread of the virus. No lockdowns have been implemented and schools have stayed open throughout the pandemic. In his book Pandemic Ethics, Ben Bramble argues that lockdowns are necessary and that Swedes may become ”somewhat colder” and ”less able to flourish” as a result of Sweden’s pandemic response. In this essay I discuss whether or not the Swedish people are being failed as moral agents by Swedish authorities during the COVID-19 pandemic. I analyse two senses in which the people could be morally wronged: (1) by having too much moral responsibility placed upon them, and (2) by becoming less virtuous or less able to flourish as a result of actions and words of the authorities. In answering (1), I argue that an individual moral agent has little or no moral responsibility from a utilitarian point of view. From a virtue ethics point of view, the cause behind the action is more important than its consequences, so being handed the responsibility for stopping the spread of coronavirus would not be significantly different from other instances where citizens are free to act in a way that may lead to them causing harm to others. By analysing examples of how citizens can exercise their moral virtues in states with differing responses to the COVID-19 pandemic, I show that citizens becoming more or less virtuous does not follow from the pandemic response of the country they live in, thereby refuting (2). I then briefly discuss two ways in which I believe authorities could fail its citizens as moral agents.
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Guyot, Paul. "Simulations multi-agents participatives : faire interagir agents et humains pour modéliser, explorer et reproduire les comportements collectifs." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2006. http://tel.archives-ouvertes.fr/tel-00084064.

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Ce travail répond à un intérêt des concepteurs de systèmes multi-agents pour la validation de modèles de comportements collectifs, la modélisation des stratégies individuelles, la traduction informatique des interactions entre agents et les conditions d'émergence de solutions collectives. Les simulations multi-agents participatives sont des expériences construites pour explorer, modéliser et reproduire dans les systèmes multi-agents les capacités d'innovation mises en œuvre par les groupes sociaux pour résoudre collectivement des problèmes, et dans lesquelles des participants humains accèdent à la simulation comme des agents logiciels. Toutes les interactions prennent la forme d'interactions entre agents et sont enregistrées. Ces simulations permettent de valider des modèles de résolution collective de problèmes, de faire expliciter les stratégies des participants et de déterminer des conditions suffisantes pour qu'émergent des stratégies collectives. Les enregistrements ont permis de mettre au point une technique d'extraction automatique de motifs d'interaction et d'isoler trois propriétés nécessaires d'un langage qui décrirait ces interactions. Des simulations multi-agents ont par la suite vérifié que les comportements qui émergent lors des expériences peuvent se révéler plus efficaces que les comportements du modèle initial.
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Voss, Jan [Verfasser], Ulrich [Akademischer Betreuer] Faigle, Rainer [Akademischer Betreuer] Schrader, and Alexander [Akademischer Betreuer] Schönhuth. "A system-theoretic approach to multi-agent models / Jan Voss. Gutachter: Ulrich Faigle ; Rainer Schrader ; Alexander Schönhuth." Köln : Universitäts- und Stadtbibliothek Köln, 2012. http://d-nb.info/1038266203/34.

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Hlaibi, Miloudi. "Utilisation de superélectrophiles aromatiques comme agents de complexation de bases faibles étude cinétique et thermodynamique de complexes formés." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598317j.

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Hlaibi, Miloudi. "Utilisation de super électrophiles aromatiques comme agents de complexation de bases faibles : étude cinétique et thermodynamique des complexes formés." Paris 6, 1986. http://www.theses.fr/1986PA066209.

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Ait, Rabai Youssef. "Etude de la libération du pentachlorophénol (PCP) dans l'eau par du bois spécialement traité avec une faible quantité de PCP : effet des cycles condensation-évaporation de l'eau." Saint-Etienne, 1998. http://www.theses.fr/1998STET4005.

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Le pentachlorophénol (PCP) est l'un des produits chimiques les plus utilisés pour protéger le bois contre les champignons. De sérieux inconvénients peuvent apparaitre avec la libération de ce produit dans l'eau conduisant à une pollution dangereuse. Dans cette étude, nous avons élaboré une méthode permettant de réduire la quantité de PCP dans le bois ainsi que le temps de l'opération d'immersion tout en gardant un haut gradient de concentration à la surface du bois. A la fin du processus de libération du PCP dans l'eau, une quantité considérable du produit chimique reste localisée dans les échantillons de bois permettant ainsi la protection du bois contre les champignons. Les échantillons de bois préalablement traités par imprégnation dans une solution méthanoïque de PCP sont soumis à plusieurs cycles de condensation-évaporation de l'eau comparables aux cycles jours-nuits. Ces cycles ne modifient pas les cinétiques de libération du PCP dans l'eau et par suite ne changent pas les profils de concentration du PCP dans le bois. Au cours du processus de libération du PCP dans l'eau, les résultats obtenus expérimentalement et par calcul en utilisant un modèle numérique sont en bonne concordance. Le modèle peut donc être utilisé quelque soit les dimensions des échantillons. Ces échantillons de bois ainsi traités libèrent dans l'eau de pluie des quantités faibles de PCP, beaucoup plus faible que le bois avec une concentration uniforme de PCP. Ainsi, ce traitement participe à la protection de l'environnement et à la réduction des coûts
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Plaza, Delphine. "La gestion des émotions dans un métier de relation de service : les Animateurs Agents Mobiles engagés dans une Nouvelle Relation de Service." Paris 8, 2009. http://octaviana.fr/document/152360670#?c=0&m=0&s=0&cv=0.

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Cette recherche s'est réalisée à la RATP en contrat CIFRE et portait sur la gestion émotionnelle d'un métier au contact du public : les AAM (Animateurs Agents Mobiles). Le métier des AAM comporte des tâches variées : vente, accueil, information, maîtrise du territoire, première gestion de personnes accidentées (malaise, suicide, etc. ). Ce métier est en phase de changement : la vente est progressivement substituée aux automates et les agents travaillent en relation face à face (suppression de la vitre entre l'usager et l'agent). L'objectif de notre recherche était d'analyser les ressources mobilisées par les agents pour gérer les situations d'interaction et les émotions ressenties. 68 observations ont permis une analyse détaillée des conditions de l'activité des AAM. Nous avons identifié un premier ensemble de situations productrices d'émotions positives et de situations "délicates", potentiellement problématiques, en repérant les types de ressources utilisées. Les situations observées ont été transposées en scénarios, mis en œuvre dans la formation continue des AAM. Les résultats des entretiens semi-directifs (60) ont été étudiés en regardant les variables "ancienneté" au poste et "polyvalence" des tâches (exercice de la vente seule ou de la vente et du contrôle). Nos analyses ont mis évidence les situations d'interaction auxquelles étaient confrontés les agents ainsi que les émotions ressenties. Nous avons également identifié deux types de ressources pour gérer les émotions et les situations : des ressources propres (langage, gestuelles, etc. ) et des ressources institutionnelles (formation, encadrement). Globalement, les polyvalents expriment davantage d'émotions positives que ce soit dans les situations d'interaction ou concernant les représentations sur l'organisation du travail. Les plus jeunes agents expriment plus d'émotions positives que les anciens. On ne peut savoir si la différence tient à une "usure" dans le métier ou à l'évolution du recrutement et de la formation initiale. L'implication de la thèse porte sur une connaissance approfondie du métier des AAM, la mise en évidence des ressources utilisées pour la gestion émotionnelle, et la conception de formations pour la gestion des situations délicates<br>The thesis was supported by a transportation company (grant CIFRE with RATP). The focus was twofold. It aimed at a better knowledge of how subway operators accomplish their specific service activities. It was based on an ergonomic approach of activity analysis (Leplat, 1997, 2000) for identifying the ways through which operators manage the situations they faced and the resources they engage for managing their emotions in these situations. Ethnomethodological observations (68 operators) showed that emotions were not only negative ones (frustration, anger. . . ), but that situations management also led to positive emotions (work satisfaction, pleasure, laugh,) ; beside "neutral" situations, "positive" situations and "tricky" ones were identified, where operators engage "individual" or "institutional" resources (available in the organisation). A set of tricky situations was transposed for designing training situations (for continuous training). From these observations, semi-open interviews were organised with 60 operators differing in seniority and in the polyvalence of their work: information and sale with or without checking tasks. Globally, positive as well as "tricky" situations were available for agents commenting on their emotions. Polyvalent agents reported more positive emotions, and used more institutional resources. Younger agents were more positive than agents with more experience: it cannot be known if the difference is linked to changes in how agents are recruited and trained, or to a negative effect of long term professional activity. Unexpectedly, checking tasks were not considered trickier than interactions at the ticket office. Implications of the thesis from the company points of view were twofold. Firstly, a deep knowledge of the job of subways operators was spread over the company and was helpful for investigating a significant technical and organisational change. Second, identifying the resources operators used for managing their emotions and identifying significant positive and tricky situations were used for the design of on-the-job training situations. The chosen approach of emotions as components of activity susceptible to be managed proved to be useful in an ergonomic purpose, emphasising the existence and the role of institutional resources, which could be developed without drastic organisational changes, and the possibility of training centred on the used of existing resources
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Lies, Adrien. "Optimisation des performances d’inocula de champignons mycorhiziens dans le cadre d’une agriculture à faibles apports." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT145.

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Les champignons endomycorhiziens arbusculaires (MA) forment des relations symbiotiques avec la majorité des espèces végétales terrestres. Leur rôle écologique dans la productivité et la stabilité des agrosystèmes sont connus depuis de nombreuses années. Plusieurs études ont montré que ces symbiotes augmentent la croissance végétale et la résistance des plantes aux stress biotiques et abiotiques. Malgré le potentiel avéré de la symbiose MA pour augmenter durablement la productivité des agrosystèmes dans le cadre d’une agriculture à faibles apports d’intrants, cette biotechnologie est encore sous exploitée. Ce constat résulte essentiellement de difficultés techniques pour produire en quantité un inoculum fongique de qualité et un manque de connaissance concernant les facteurs biologiques régulant la réceptivité des sols à l’inoculation des champignons MA. Les principaux objectifs de ces travaux sont d’optimiser les performances d’un inoculum MA. (1), en associant le champignon MA avec des bactéries PGPR ou MHB. Cette stratégie vise à promouvoir l’établissement et le fonctionnement de la symbiose MA. En effet, ces bactéries bénéfiques aux plantes peuvent augmenter la croissance végétale, directement en fournissant à la plante des composés bénéfique (phytohormone, etc), et indirectement en réduisant ou prévenant les effets délétères de phytopathogènes ou en augmentant l’établissement de la symbiose MA. (2), par la gestion des cultures, notamment par l’association céréales/légumineuses en culture intercalaire. Les légumineuses sont souvent dépendantes des associations symbiotiques avec les champignons MA, et ceux-ci peuvent participer dans la nutrition azotée et phosphatée de la plante. (3), par l’amendement en composé ou organique. Ces amendements peuvent être solubilisés et dégradés par des bactéries et ainsi promouvoir la nutrition végétale sans augmenter la disponibilité de P et N dans le sol. (4), en développant des inocula complexes associant bactéries bénéfiques, champignons MA et amendement, l’ensemble contenu dans un gel d’alginate<br>Arbuscular Mycorrhizal fungi (AM) are ubiquitous microorganisms forming symbiotic relationships with the majority of terrestrial plant species. Their ecological functions in the productivity and stability of agroecosystems have been recognized for many years. Many studies have shown that these symbionts improved plant growth and plant resistance to biotic and abiotic stresses. Despite the proven potential of mycorrhizal symbiosis to sustainably improve the productivity of agroecosystems under low input agriculture, this biotechnology is still under exploited. This failure mainly results from technical difficulties to mass-produced fungal inoculum of high quality and a lack of knowledge about the biological factors regulating the soil receptivity of AM inoculation. The main objectives of our studies are to optimize the performance of an AM fungal inoculum. (1), by combining the AM fungus with Plant Growth Promoting Rhizobacteria, or Mycorrhizal Helper Bacteria. This strategy aims to promote the establishment and the functioning of the mycorrhizal symbiosis. Indeed, this plant beneficial bacteria may affect plant growth through two different pathways, directly by providing to the plant some beneficial compounds (i.e. phytohormones, etc), indirectly, by reducing or preventing the deleterious effects of phytopathogens or by improving the establishment of the mycorrhizal symbiosis. (2), by plant management with the association of cereal/leguminous in intercropping. Leguminous are often dependent of AM association and AM fungi may participate to promote N and P plant uptake. (3), by amendment of mineral or organic compounds. These amendments can be degraded slowly by bacteria and promote plant nutrition without increase P and N soil availability. (4), by development of complex inocula associating beneficial bacteria, AM fungi and amendment, based on the entrapment of these inocula in alginate gels
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Books on the topic "Failed agent"

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Ontario. Esquisse de cours 12e année: Le droit canadien et international cln4u cours préuniversitaire. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: Étude de l'alimentation et de la nutrition hfa4m cours préuniversitaire. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: Atelier d'écriture fae4o cours ouvert. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: Histoire de l'Occident et du monde chy4u. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: Géométrie et mathématiques discrètes mga4u cours préuniversitaire. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: Français des affaires faf4o. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: L'église et la culture hre4m. CFORP, 2007.

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Ontario. Esquisse de cours 12e année: Politique canadienne et mondiale cpw4u cours préuniversitaire. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: The writer's craft eac4c cours précollégial. CFORP, 2002.

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Ontario. Esquisse de cours 12e année: Études interdisciplinaires un monde sans frontières idc4o cours ouvert. CFORP, 2002.

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Book chapters on the topic "Failed agent"

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Hill, Martin P., and Julie A. Coetzee. "How can progress in the understanding of antagonistic interactions be applied to improve biological control of plant invasions?" In Plant invasions: the role of biotic interactions. CABI, 2020. http://dx.doi.org/10.1079/9781789242171.0363.

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Abstract Classical biological control has been used as a management tool for invasive non-native plant species globally for over 200 years. There have been some very successful programmes, most notably on waterweeds, cacti and seed reduction in perennial trees. Seventy per cent of agents released have established in at least one instance, and 66% of the targeted invasive species have showed some level of control. However, some programmes have failed to meet expectations, for example on Lantana camara. The most commonly cited reasons for the failure of establishment or limited efficacy of biological control agents are unsuitable climatic conditions and genotype incompatibility. We propose that antagonistic biotic interactions play a significant role in the outcomes of weed biological control programmes. Induced plant defences (physical and chemical) that can be mounted rapidly by the invasive non-native plants can result in the reduction in agent populations after initial attack. Rapid induction of plant defences have been implicated in the lack of long-term establishment of the agent Falconia intermedia that showed great initial promise against the widespread invasive shrub L. camara. Host range expansion by native natural enemies onto biological control agents have also been shown to reduce population growth of agents. Finally, competition from indigenous plant species aids invasive alien plant population reduction in the presence of herbivory. All three factors have been poorly studied and further work is needed to better explain the outcomes of weed biological control programmes.
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Gooding, Tim. "Agent-Based Model History and Development." In Economics for a Fairer Society. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17020-2_4.

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Edmonds, Bruce. "How Formal Logic Can Fail to Be Useful for Modelling or Designing MAS." In Regulated Agent-Based Social Systems. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-25867-4_1.

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Yokohama, Shizuka, and Kazuko Takahashi. "What Should an Agent Know Not to Fail in Persuasion?" In Multi-Agent Systems and Agreement Technologies. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33509-4_18.

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Flocchini, Paola, Evangelos Kranakis, Danny Krizanc, Flaminia L. Luccio, Nicola Santoro, and Cindy Sawchuk. "Mobile Agents Rendezvous When Tokens Fail." In Structural Information and Communication Complexity. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-27796-5_15.

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Berlot, G., and M. Soiat. "Receptor Blocking Agents: Why Did They Fail?" In Anaesthesia, Pain, Intensive Care and Emergency Medicine - A.P.I.C.E. Springer Milan, 1998. http://dx.doi.org/10.1007/978-88-470-2278-2_55.

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Das, Shantanu, Matúš Mihalák, Rastislav Šrámek, Elias Vicari, and Peter Widmayer. "Rendezvous of Mobile Agents When Tokens Fail Anytime." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-92221-6_29.

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Li, Toby Jia-Jun, Igor Labutov, Brad A. Myers, Amos Azaria, Alexander I. Rudnicky, and Tom M. Mitchell. "Teaching Agents When They Fail: End User Development in Goal-Oriented Conversational Agents." In Human–Computer Interaction Series. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95579-7_6.

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Opal, S. M. "Clinical Trials of Novel Therapeutic Agents: Why did they fail?" In Yearbook of Intensive Care and Emergency Medicine. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79154-3_34.

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Davis, Jennifer A., Laura R. Humphrey, and Derek B. Kingston. "When Human Intuition Fails: Using Formal Methods to Find an Error in the “Proof” of a Multi-agent Protocol." In Computer Aided Verification. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25540-4_20.

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Conference papers on the topic "Failed agent"

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De Luca, Marco. "Why Robots Failed - Demonstrating the Superiority of Multiple-order Trading Agents in Experimental Human-agent Financial Markets." In International Conference on Agents and Artificial Intelligence. SCITEPRESS - Science and and Technology Publications, 2015. http://dx.doi.org/10.5220/0005203100440053.

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Ameri, Farhad, and Christian McArthur. "An Ontological Approach to Manufacturing Supplier Discovery in Virtual Markets." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28179.

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Manufacturing supply chains are increasingly becoming global, virtual and short-lived in order to improve their agility and dynamic adaptability to rapid changes in today’s volatile market. In this context, online marketplaces for manufacturing services have become attractive venues for rapid development of supply chain relationships. Despite their numerous benefits, the existing online markets have failed in adequately automating the supply chain deployment process. Heavy reliance of the existing online markets on human agents for formulating supplier queries and evaluating the obtained results can be mainly attributed to the informal nature of the information models used in these markets. To enable active involvement of machine agents in supply chain deployment, the underlying information models that support online markets should represent the semantics of information in a formal and machine-interpretable fashion. This paper introduces Manufacturing Service Description Language (MSDL) as a formal ontology for description of suppliers’ capability at different levels of abstraction including process-level, machine-level, and system level. Also, an agent-based framework is proposed in this paper that facilitates automated discovery and evaluation of potential manufacturing partners based on the MSDL description of the services they provide.
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Shih, Chien-Jen, Keith E. Forrester, and Wen-Bin Fan. "Application of Dry Chemical Stabilization Technology in Taiwan Kobin Bottom Ash Processing and Recycle Plant." In 14th Annual North American Waste-to-Energy Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/nawtec14-3191.

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The Taiwan Kobin Bottom Ash Processing &amp; Recycle Plant (Kobin-BAPRP) processes approximately one quarter million metric tons of bottom ashes from several municipal solid wastes the incinerators annually, generating fine aggregate finished products and ferrous recovery. The results from USEPA Method 1311 Toxicity Characteristic Leaching Procedure (TCLP) for un-treated bottom ash indicate that about 5% of the time that lead and less than 0.5% of the time, copper or cadmium may fail to meet leaching standards (i.e. 5 mg/L for Pb, 15 mg/L for Cu, and 1 mg/L for Cd ). Previously, Kobin applied phosphoric acid solution for stabilization, which caused strong odor problem, increased moisture content, and still about 1% of the time that TCLP-Pb failed to pass the standard, hence, required reprocessing. Recently, Kobin-BAPRP has switched its stabilization agent from the phosphoric acid solution to dry chemical dosage. In addition to having a better stabilized byproduct, the use of dry chemical further ensures worker safety. Dry chemical is water insoluble and fine calcium phosphate particles, with different combinations of buffers and complexing agents, such as Fe+2, Fe+3, Al+3, or chloride. It took about 8 months for laboratory tests and plant trials to identify the optimum dosage as well as the best mixing point. Long term operation has demonstrated that dry chemical spread and mixing is safe to communities and workers, non-reactive with storage and handling materials, generates no toxic gases or odor, and most importantly, provides for effective and consistent Pb stabilization. The final stable family of mineral crystals includes complexed hydroxyapatite and chlorapatite minerals.
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Karri, Sunil, and Sarah L. Kieweg. "Mathematical Simulation and Parametric Study of Flow of a Microbicidal Gel Between Elastic Boundaries." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53719.

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Topical microbicides, the next generation prevention tool for HIV and other sexually transmitted pathogens, hold great promise if the target vaginal or rectal epithelium is coated effectively. A microbicide consists of an active ingredient within a polymeric delivery vehicle (e.g. polymeric liquid or ‘gel’). Most research in the field of microbicides has been limited to the development of an active ingredient and many microbicidal trails have failed in the past. Thus, there is a need to design a delivery vehicle that optimizes the efficacy of a microbicidal agent. The effectiveness of the gel depends on the gel’s rheological properties as well as the vaginal tissue properties, vaginal geometry, and external forces like gravity. A good design must take these factors in to consideration and a better understanding of the gel’s flow behavior over the epithelium is important before proceeding with clinical trials.
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Welch, Lawrence, and Stephen Ekwaro-Osire. "Fairness in Agent Based Simulation Frameworks." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49326.

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An agent based simulation engine should provide a fair playing field for all of its agents. A fundamental design axiom of agent based simulation frameworks is that the simulation engine should not arbitrarily bias its execution towards one agent or another. This fairness is basic to giving the agent modeler confidence that differences in behavior and performance between agents derive legitimately from the simulation modeling, initial conditions or specific agent characteristics, rather than the capriciousness of the underlying framework. One aspect of fairness in a simulation is the relative order of execution of agents over time. This order of execution is affected by techniques employed by frameworks to simulate the concurrent activities of multiple agents. One such technique is multi-threading. Multi-threaded operating systems, or programming languages and environments, such as Java, allow multiple agents, represented by software threads, to share the computer’s execution time by taking turns, thus appearing to act simultaneously. The precise order of execution of peer threads in multi-threaded applications is often out of the hands of the programmer, and may be determined exclusively by the operating system or program execution environment. However, if overlooked by the framework developer, the idiosyncrasies of a particular thread ordering mechanism can pass on to the modeler inherent random behavior that is neither intuitive, nor in line with the modeler’s expectations. To be considered fair, the engine should aim to provide all agents with equal probability of executing first within a time step, or last, or in any position in between. This paper analyzes the sequencing of agent thread execution within a Java framework that implements a multi-threaded, time-stepping, agent based simulation engine. The natural ordering of Java thread execution is demonstrated to be unfair (that is, not uniform) in its treatment of agents. This research shows that the standard mechanism of Java thread scheduling, while appropriate for most applications, is inappropriate on its own for the agent based framework. It is demonstrated that with Java’s standard thread scheduling algorithm, over time certain agents tend to execute ahead of others within each time step, while others tend to execute in the middle or at the back of the pack. This paper then introduces and demonstrates the “Uniform Specific Notification” pattern, a technique that produces a fairer, uniformly distributed random order for the initial execution of Java agent threads at each simulation time step.
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Wachi, Akifumi. "Failure-Scenario Maker for Rule-Based Agent using Multi-agent Adversarial Reinforcement Learning and its Application to Autonomous Driving." In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/832.

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We examine the problem of adversarial reinforcement learning for multi-agent domains including a rule-based agent. Rule-based algorithms are required in safety-critical applications for them to work properly in a wide range of situations. Hence, every effort is made to find failure scenarios during the development phase. However, as the software becomes complicated, finding failure cases becomes difficult. Especially in multi-agent domains, such as autonomous driving environments, it is much harder to find useful failure scenarios that help us improve the algorithm. We propose a method for efficiently finding failure scenarios; this method trains the adversarial agents using multi-agent reinforcement learning such that the tested rule-based agent fails. We demonstrate the effectiveness of our proposed method using a simple environment and autonomous driving simulator.
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Storr, Alfred, Rui Li, and Hansjoerg Stroehle. "Agent-Based NC Process Planning for Complete Machining on Turning Centers." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/cie-14635.

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Abstract The application of turning centers for complete machining greatly increases production efficiency by means of introducing new machining possibilities. At the same time, it makes the generation of NC process plans more complicated and as a result the current process planning methods often fail in dealing with the new requirements. Based on agent theory this paper presents a new strategy for distributing a complex planning task to different relatively small planning units, so-called agents, which are defined considering both machine and workpiece structure. Instead of a central algorithm the agent based planning method generates NC process plans through some cooperative activities between different agents. The activity model and the cooperation rule are also discussed in detail.
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Oruambo, Tamunomiete, Elias Arochukwu, Felix Okoro, Linda Dennar, and Olalekan Otubu. "Managing the Impact of in Situ Fines Migration in Production Optimization – A Case History from a Niger Delta Field." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/208265-ms.

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Abstract In the oil and gas business, a key strategy of well management is the deployment of the right tools and knowledge to enable continuous and optimized production. One of such tools is Matrix acidizing - A stimulation activity designed to remove wellbore damage and improve well inflow. The ability to sustain optimal production from most wells after acidization is often hampered with further fines migration problems and this requires specialized treatment to mitigate. WELL-001 quit production and was re-entered for a workover in 2018, to recomplete shallower on the same reservoir sand and restore production, however, post workover and subsequent clean up, the well failed to sustain flow. Two additional stimulation operations were also unsuccessful despite gas lift assistance. An Integrated review was held which identified key damage mechanisms impeding flow; deep fines migration which are not well handled by conventional stimulation recipes, emulsion and impairment from Loss Circulation Material (CaCO3 + XCD Polymer). A Novel solution was identified which included an Ultra-Thin Tackifying Agent (UTTA) as part of the stimulation cocktail with the primary purpose of stabilizing the fines at source and preventing further migration with the flowing fluids. The treatment was deployed successfully and the well lifted immediately, achieving a rate of 800 bopd vs a planned potential of 650 bopd. The impact of this success is not only evident in production but also in resource volume estimation and booking.
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Boehmer, Niclas, and Edith Elkind. "Stable Roommate Problem with Diversity Preferences." In Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/14.

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In the multidimensional stable roommate problem, agents have to be allocated to rooms and have preferences over sets of potential roommates. We study the complexity of finding good allocations of agents to rooms under the assumption that agents have diversity preferences (Bredereck, Elkind, Igarashi, AAMAS'19): each agent belongs to one of the two types (e.g., juniors and seniors, artists and engineers), and agents’ preferences over rooms depend solely on the fraction of agents of their own type among their potential roommates. We consider various solution concepts for this setting, such as core and exchange stability, Pareto optimality and envy-freeness. On the negative side, we prove that envy-free, core stable or (strongly) exchange stable outcomes may fail to exist and that the associated decision problems are NP-complete. On the positive side, we show that these problems are in FPT with respect to the room size, which is not the case for the general stable roommate problem.
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Herzig, Andreas, and Antonio Yuste Ginel. "Multi-Agent Abstract Argumentation Frameworks With Incomplete Knowledge of Attacks." In Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/265.

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We introduce a multi-agent, dynamic extension of abstract argumentation frameworks (AFs), strongly inspired by epistemic logic, where agents have only partial information about the conflicts between arguments. These frameworks can be used to model a variety of situations. For instance, those in which agents have bounded logical resources and therefore fail to spot some of the actual attacks, or those where some arguments are not explicitly and fully stated (enthymematic argumentation). Moreover, we include second-order knowledge and common knowledge of the attack relation in our structures (where the latter accounts for the state of the debate), so as to reason about different kinds of persuasion and about strategic features. This version of multi-agent AFs, as well as their updates with public announcements of attacks (more concretely, the effects of these updates on the acceptability of an argument) can be described using S5-PAL, a well-known dynamic-epistemic logic. We also discuss how to extend our proposal to capture arbitrary higher-order attitudes and uncertainty.
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