368,894 research outputs found
Evolving Fuzzy Rules for Relaxed-Criteria Negotiation
No full textIn the literature on automated negotiation, very few negotiation agents are designed with the flexibility to slightly relax their negotiation criteria to reach a consensus more rapidly and with more certainty. Furthermore, these relaxed-criteria negotiation agents were not equipped with the ability to enhance their performance by learning and evolving their relaxed-criteria negotiation rules. The impetus of this work is designing market-driven negotiation agents (MDAs) that not only have the flexibility of relaxing bargaining criteria using fuzzy rules, but can also evolve their structures by learning new relaxed-criteria fuzzy rules to improve their negotiation outcomes as they participate in negotiations in more e-markets. To this end, an evolutionary algorithm for adapting and evolving relaxed-criteria fuzzy rules was developed. Implementing the idea in a testbed, two kinds of experiments for evaluating and comparing EvEMDAs (MDAs with relaxed-criteria rules that are evolved using the evolutionary algorithm) and EMDAs (MDAs with relaxed-criteria rules that are manually constructed) were carried out through stochastic simulations. Empirical results show that: 1) EvEMDAs generally outperformed EMDAs in different types of e-markets and 2) the negotiation outcomes of EvEMDAs generally improved as they negotiated in more e-markets
QUALIFICAÇÃO DO CONHECIMENTO CRÍTICO E ESTRATÉGICO EM BASES INFORMACIONAIS: O CASE SIM NO PLANEJAMENTO ESTRATÉGICO DO IFSC
No full textDa necessidade identificada pelo Instituto Federal de Educação, Ciência e Tecnologia de Santa Catarina - IFSC, no sentido de alicerçar seu Plano de Desenvolvimento Institucional - PDI, para o quinquênio 2015-2019, em uma base informacional definida como estratégica para os fins institucionais, a Diretoria de Gestão do Conhecimento, vinculada à Pró-Reitoria de Desenvolvimento Institucional, concebeu o projeto SIM. A Síntese Informativa das Microrregiões caracteriza-se pelo mapeamento de dados, informações e indicadores externalizados por meio de tabelas e gráficos, resultando em um diagnóstico dos cenários demográfico, econômico, de emprego e de educação de cada microrregião do estado de Santa Catarina, onde, na época, havia câmpus do IFSC instalado. Essa base informacional consolida-se internamente como fonte valiosa de conhecimento estratégico institucional. Nesse sentido, o presente artigo tem por objetivo analisar o referido case, considerando a base informacional disponibilizada como conhecimento estratégico que subsidia e qualifica os processos de gestão do conhecimento e de planejamento institucional do IFSC. A metodologia aplicada foi a de pesquisa exploratória, do tipo qualitativa, realizada a partir da pesquisa bibliográfica em conjunto com o estudo de caso, da qual se extrai como resultados a justificação e validação da SIM como base informacional estratégica aos processos de gerenciamento e tomada de decisão do IFSC, mormente de planejamento estratégico
Grid Commerce, Market-Driven G-Negotiation, and Grid Resource Management
No full textAlthough the management of resources is essential
for realizing a computational grid, providing an efficient resource
allocation mechanism is a complex undertaking. Since Grid
providers and consumers may be independent bodies, negotiation
among them is necessary. The contribution of this paper
is showing that market-driven agents (MDAs) are appropriate
tools for Grid resource negotiation.MDAs are e-negotiation agents
designed with the flexibility of: 1) making adjustable amounts of
concession taking into account market rivalry, outside options,
and time preferences and 2) relaxing bargaining terms in the
face of intense pressure. A heterogeneous testbed consisting of
several types of e-negotiation agents to simulate a Grid computing
environment was developed. It compares the performance
of MDAs against other e-negotiation agents (e.g., Kasbah) in a
Grid-commerce environment. Empirical results show that MDAs
generally achieve: 1) higher budget efficiencies in many market
situations than other e-negotiation agents in the testbed and
2) higher success rates in acquiring Grid resources under high
Grid loadings
A Web/Grid Services Approach for Integration of Virtual Clinical & Research Environments
No full textClinicans have responsibilities for audit and research, often participating in projects with basic scientist colleagues. Our work in a regional teaching hospital setting involves collaboration with the medical school computer services and builds upon work developed in computer science department as part of the Collaborative Orthopaedic Research Environment (CORE) project[1]. This has established a pilot study for proof of concept work. Users are mapped to a personal profile implemented using XML and a service oriented architecture (SOA)[2,3]. This bridges the e-Health and e-Science domains, addressing some of the basic questions of security and uptake
Retention of data in heat-damaged SIM cards and potential recovery methods
No full textExamination of various SIM cards and smart card devices indicates that data may be retained in SIM card memory structures even after heating to temperatures up to 450oC, which the National Institute of Standards and Technology (NIST) has determined to be approximately the maximum average sustained temperature at desk height in a house fire. However, in many cases, and certainly for temperatures greater than 450oC, the SIM card chip has suffered structural or mechanical damage that renders simple probing or rewiring ineffective. Nevertheless, this has not necessarily affected the data, which is stored as charge in floating gates, and alternative methods for directly accessing the stored charge may be applicable
The sim gene of Escherichia coli phage P1: nucleotide sequence and purification of the processed protein
No full textMaillou J, Dreiseikelmann B. The sim gene of Escherichia coli phage P1: nucleotide sequence and purification of the processed protein. Virology. 1990;175(2):500-507.The sim gene of bacteriophage P1 causes exclusion of a superinfecting P1 phage. We determined the nucleotide sequence of a 1.9-kb DNA fragment that, in plasmids, causes Sim phenotype. There are two open reading frames within this region for proteins of 82 and 259 amino acids. A 1.3-kb fragment containing the larger open reading frame was inserted into an expression vector. Induced cells carrying the hybrid plasmid, termed pBD5, were not infected by phage P1 and produced a 24-kDa protein and, to a smaller extent, a 25-kDa protein. The 24-kDa protein was purified. Comparison of its amino-terminal amino acid sequence with the nucleotide sequence indicated that it is processed from a precursor protein by removal of a hydrophobic leader peptide of 20 amino acids. In vivo processing depends on secA gene function and is necessary for Sim interference with P1 infection. The data are discussed with respect to the function of the sim gene in superinfection exclusion
India: produção e consumo de carnes e leite.
No full textA Índia é a terceira maior economia entre os países asiáticos e uma das que mais crescem no mundo, com variação positiva do PIB de 7,4%, em 2016. O setor de serviços é a atividade com maior participação no PIB, com 54,4% do total, enquanto a agricultura representa 16,1% do PIB, mas emprega 49,0% da força de trabalho. Em 2015, sua população era estimada em 1,31 bilhão de pessoas e deve ultrapassar a da China em 2025. No ano de 2015 contava com a maior força de trabalho, em torno de 400 a 500 milhões de pessoas. É significativo o esforço de políticas governamentais indianas para apoiar os agricultores nacionais, promover o desenvolvimento rural e, ao mesmo tempo, diminuir a insegurança alimentar. Para incrementar a produção agrícola e incentivar rendimentos, várias medidas governamentais relacionadas à oferta foram tomadas, tais como: subsídios de insumos para fertilizantes, energia elétrica, crédito agrícola e investimentos em irrigação
Sensititre Y05 per l’antimicogramma di lieviti e muffe
No full textIl pannello Sensititre YO5, non ancora disponibile per antimicogrammi di routine, comprende la caspofungina, un’echinocandina con ampio spettro d’azione che inibisce specificamente la ß1-3 D-glucan sintetasi e danneggia direttamente l’impalcatura della parete cellulare.
Il pannello è stato utilizzato per l’antimicogramma di 128 ceppi clinici di funghi di cui 16 Aspergillus spp. e 112 Candida spp. Come ceppi di controllo sono stati utilizzati C. krusei ATCC® 6258, C. parapsilosis ATCC® 22019 e A. flavus ATCC® 204304
Agent-Based Cloud Computing
No full textAgent-based cloud computing is concerned with the design and development of software agents for bolstering cloud service
discovery, service negotiation, and service composition. The significance of this work is introducing an agent-based paradigm for
constructing software tools and testbeds for cloud resource management. The novel contributions of this work include: 1) developing
Cloudle: an agent-based search engine for cloud service discovery, 2) showing that agent-based negotiation mechanisms can be
effectively adopted for bolstering cloud service negotiation and cloud commerce, and 3) showing that agent-based cooperative problemsolving
techniques can be effectively adopted for automating cloud service composition. Cloudle consists of 1) a service discovery agent
that consults a cloud ontology for determining the similarities between providers’ service specifications and consumers’ service
requirements, and 2) multiple cloud crawlers for building its database of services. Cloudle supports three types of reasoning: similarity
reasoning, compatibility reasoning, and numerical reasoning. To support cloud commerce, this work devised a complex cloud
negotiation mechanism that supports parallel negotiation activities in interrelated markets: a cloud service market between consumer
agents and broker agents, and multiple cloud resource markets between broker agents and provider agents. Empirical results show that
using the complex cloud negotiation mechanism, agents achieved high utilities and high success rates in negotiating for cloud resources.
To automate cloud service composition, agents in this work adopt a focused selection contract net protocol (FSCNP) for dynamically
selecting cloud services and use service capability tables (SCTs) to record the list of cloud agents and their services. Empirical results
show that using FSCNP and SCTs, agents can successfully compose cloud services by autonomously selecting services
Grid Resource Negotiation: Survey and New Directions
No full textSince Grid computing systems involve large-scale resource sharing, resource management is central to their operations. Whereas there are more Grid resource management systems adopting auction, commodity market, and contract-net (tendering) models, this survey supplements and complements existing surveys by reviewing, comparing, and highlighting existing research initiatives on applying bargaining (negotiation) as a mechanism to Grid resource management. The contributions of this paper are: 1) discussing the motivations for considering bargaining models for Grid resource allocation; 2) discussing essential design considerations such as modeling devaluation of Grid resources, considering market dynamics, relaxing bargaining terms, and co-allocation of resources when building Grid negotiation mechanisms; 3) reviewing the strategies and protocols of state-of-the-art Grid negotiation mechanisms; 4) providing detailed comparisons and analyses on how state-of-the-art Grid negotiation mechanisms address the design considerations mentioned in 3); and 5) suggesting possible new directions
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