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Academic literature on the topic 'EPNN'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "EPNN"

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Tang, Yajiao, Junkai Ji, Yulin Zhu, Shangce Gao, Zheng Tang, and Yuki Todo. "A Differential Evolution-Oriented Pruning Neural Network Model for Bankruptcy Prediction." Complexity 2019 (August 4, 2019): 1–21. http://dx.doi.org/10.1155/2019/8682124.

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Financial bankruptcy prediction is crucial for financial institutions in assessing the financial health of companies and individuals. Such work is necessary for financial institutions to establish effective prediction models to make appropriate lending decisions. In recent decades, various bankruptcy prediction models have been developed for academics and practitioners to predict the likelihood that a loan customer will go bankrupt. Among them, Artificial Neural Networks (ANNs) have been widely and effectively applied in bankruptcy prediction. Inspired by the mechanism of biological neurons, we propose an evolutionary pruning neural network (EPNN) model to conduct financial bankruptcy analysis. The EPNN possesses a dynamic dendritic structure that is trained by a global optimization learning algorithm: the Adaptive Differential Evolution algorithm with Optional External Archive (JADE). The EPNN can reduce the computational complexity by removing the superfluous and ineffective synapses and dendrites in the structure and is simultaneously able to achieve a competitive classification accuracy. After simplifying the structure, the EPNN can be entirely replaced by a logic circuit containing the comparators and the logic NOT, AND, and OR gates. This mechanism makes it feasible to apply the EPNN to bankruptcy analysis in hardware implementations. To verify the effectiveness of the EPNN, we adopt two benchmark datasets in our experiments. The experimental results reveal that the EPNN outperforms the Multilayer Perceptron (MLP) model and our previously developed preliminary pruning neural network (PNN) model in terms of accuracy, convergence speed, and Area Under the Receiver Operating Characteristics (ROC) curve (AUC). In addition, the EPNN also provides competitive and satisfactory classification performances in contrast with other commonly used classification methods.

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Sailaja, Rayi, Chiramdasu Rupa, and Ardhani Chakravarthy. "EPNN Based High Secure Intensive Hidden Digital Watermark Application in Telemedicine." Advances in Modelling and Analysis A 56, no. 1 (2019): 21–25. http://dx.doi.org/10.18280/ama_a.560104.

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Wang, Ying, Christopher E. Pedigo, Kazunori Inoue, et al. "Murine Epsins Play an Integral Role in Podocyte Function." Journal of the American Society of Nephrology 31, no. 12 (2020): 2870–86. http://dx.doi.org/10.1681/asn.2020050691.

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BackgroundEpsins, a family of evolutionarily conserved membrane proteins, play an essential role in endocytosis and signaling in podocytes.MethodsPodocyte-specific Epn1, Epn2, Epn3 triple-knockout mice were generated to examine downstream regulation of serum response factor (SRF) by cell division control protein 42 homolog (Cdc42).ResultsPodocyte-specific loss of epsins resulted in increased albuminuria and foot process effacement. Primary podocytes isolated from these knockout mice exhibited abnormalities in cell adhesion and spreading, which may be attributed to reduced activation of cell division control protein Cdc42 and SRF, resulting in diminished β1 integrin expression. In addition, podocyte-specific loss of Srf resulted in severe albuminuria and foot process effacement, and defects in cell adhesion and spreading, along with decreased β1 integrin expression.ConclusionsEpsins play an indispensable role in maintaining properly functioning podocytes through the regulation of Cdc42 and SRF-dependent β1 integrin expression.

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Haji Allahverdipour, Hana, and Javad Karimi. "Nematodes Versus White Grubs: Long But Challenging Association." Annals of the Entomological Society of America 114, no. 4 (2021): 448–58. http://dx.doi.org/10.1093/aesa/saab016.

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Abstract Soil as a shared habitat of white grubs and entomopathogenic nematodes (EPNs) is a double-edged sword from the biological control point of view. Soil encompasses a diverse array of EPNs that could be exploited in grub microbial control; on the other hand, soil promotes the natural resistance of grubs to EPNs via the battle between both sides within the soil matrix. White grubs and EPNs have been armed in this battle by a multifaceted range of mechanisms, namely grub structural and physiological barriers, antagonism of grub gut microbiota toward the nematode bacterial symbionts, EPN excreted/secreted proteins, surface coat proteins, ascaroside pheromones produced by EPNs, and evolution of EPN resistance to herbivore self-defense. From the evolutionary point of view, EPN–grub interactions, the most advanced (sophisticated) association among others, could have evolved from other types of associations. Entomophilic nematode (e.g., Pristionchus spp.), the cognate bacterium and scarab associations along with the formation of dauer juveniles, are proof of preadaptation to entomopathogeny in a continual evolution. Here, we delve into the salient features of each component of EPN-white grub–host plant tripartite interactions as well as hints to improved exploitation of EPNs for grub management. Also, evolutionary associations between nematodes and scarabs will be reviewed, in short.

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Treviño-Cueto, Diego, Sergei A. Subbotin, and Sergio R. Sanchez-Peña. "Larvicidal Activity of Entomopathogenic Nematodes Isolated from Mexico against Aedes aegypti (Diptera: Culicidae)." Journal of Entomological Science 56, no. 1 (2021): 12–23. http://dx.doi.org/10.18474/0749-8004-56.1.12.

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Abstract Entomopathogenic nematodes (EPNs) are widely used agents of biological control, mainly targeting soil-inhabiting insect pests. Reports indicate that these terrestrial EPNs are also able to infect the aquatic larvae of mosquitoes. We isolated EPN strains (Heterorhabditis bacteriophora Poinar and Steinernema carpocapsae [Weiser]) from local soils at Saltillo, Coahuila state, Mexico. EPNs from these strains were produced in the laboratory in yellow mealworm (Tenebrio molitor L.) larvae, and their pathogenicity as infective juveniles (IJs) was tested against larvae of the yellow fever mosquito Aedes aegypti (L.) Third- and fourth-instar mosquito larvae were exposed to four concentrations of IJs (25, 50, 100, and 200 IJ/larva) of five strains of local EPNs in laboratory assays. All strains of EPN caused lethal infections in larvae (3–100%); in particular, strain M5 of S. carpocapsae caused 100% mortality at the 200 IJ/larva concentration, with a median lethal concentration (LC50) of 42 IJ/larva (LC90 = 91 IJ/larva). Strain M18 of H. bacteriophora caused 73% mortality at 200 IJ/larva, with an LC50 = 72 and LC90 = 319 IJ/larva. IJs were produced by all strains in mosquito larvae, with a range of 66–239 IJ/mosquito larva (inoculated at 100 IJ/larva) across strains, suggesting that horizontal transmission might occur in the field. This represents the first report of native EPN strains from Mexico exhibiting pathogenicity against mosquito larvae. Native EPN strains should be further evaluated as potential biological control agents in mosquito management.

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Leal, Luís Carlos de Souza Rodrigues, Caio Márcio de Oliveira Monteiro, Alessandra Ésther de Mendonça, Vânia Rita Elias Pinheiro Bittencourt, and Avelino José Bittencourt. "Potential of entomopathogenic nematodes of the genus Heterorhabditis for the control of Stomoxys calcitrans (Diptera: Muscidae)." Revista Brasileira de Parasitologia Veterinária 26, no. 4 (2017): 451–56. http://dx.doi.org/10.1590/s1984-29612017065.

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Abstract The present study verified the pathogenic potential of entomopathogenic nematodes (EPNs) of the genus Heterorhabditis (Heterorhabditis bacteriophora, isolate HP88 and Heterorhabditis baujardi isolate LPP7) to immature stages of Stomoxys calcitrans in the laboratory. All EPN concentrations of the H. bacteriophora HP88 strain caused mean larval mortality greater than 90% after four days. Higher concentrations of the H. baujardi LPP7 isolate (≥50 EPNs/larva) eliminated more than 70% of larvae after six days with the concentration 200 EPNs/larva reaching mortality levels of 93.3%. The larval mortality at all concentrations of EPNs (25, 50, 100, 150, and 200 EPNs/larva) for both strains was significant (p<0.05) when compared to the respective control groups. Concentrations of H. bacteriophora HP88 yielded an LC50 of 0.36 EPN/larva and LC90 of 29.1; while H. baujardi LPP7 yielded an LC50 of 39.85 and LC90 of 239.18. H. bacteriophora HP88 provided greater inhibition of the emergence of adults when compared to the response obtained with H. baujardi LPP7. EPNs did not cause considerable mortality when applied directly to pupae. The set of observed results suggests that the EPNs of the genus Heterorhabditis, isolates HP88 and LPP7, are a promising alternative in the control of the stable fly.

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Abd-Elgawad, Mahfouz M. M. "Optimizing Sampling and Extraction Methods for Plant-Parasitic and Entomopathogenic Nematodes." Plants 10, no. 4 (2021): 629. http://dx.doi.org/10.3390/plants10040629.

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Plant-parasitic and entomopathogenic nematodes (PPNs and EPNs) are key groups in crop production systems. This study aims at optimizing nematode sampling and extraction methods to benefit integrated pest management (IPM) through (a) management of PPNs and (b) use of EPNs. The impacts of these methods on PPNs and EPNs to achieve cost-effective and efficient IPM programs are presented. The common misuses of sampling and extraction methods are discussed. Professionals engaged in IPM should consider sampling the reliability level in the light of the intended goal, location, crop value, susceptibility, nematode species, and available funds. Logical sampling methodology should be expanded to integrate various factors that can recover extra EPN isolates with differential pathogenicity. It should seek for the best EPN-host matching. Merits of repeated baiting for EPN extraction from soil and sieving for PPN recovery from suspensions are presented. Their extraction values may be modelled to quantify the efficiency of nematode separation. The use of proper indices of dispersion to enhance the biocontrol potential of EPNs or save costs in nematicidal applications is ideally compatible with IPM programs. Selecting an extraction method may sometimes require further tests to find the best extraction method of the existing fauna and/or flora. Cons and pros of modern sampling and extraction techniques are highlighted.

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Kin, Kassandra, Tiffany Baiocchi, and Adler R. Dillman. "Dispersal and Repulsion of Entomopathogenic Nematodes to Prenol." Biology 8, no. 3 (2019): 58. http://dx.doi.org/10.3390/biology8030058.

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Chemosensory cues are crucial for entomopathogenic nematodes (EPNs)—a guild of insect-killing parasitic nematodes that are used as biological control agents against a variety of agricultural pests. Dispersal is an essential element of the EPN life cycle in which newly developed infective juveniles (IJs) emerge and migrate away from a resource-depleted insect cadaver in order to search for new hosts. Emergence and dispersal are complex processes that involve biotic and abiotic factors, however, the elements that result in EPN dispersal behaviors have not been well-studied. Prenol is a simple isoprenoid and a natural alcohol found in association with EPN-infected, resource-depleted insect cadavers, and this odorant has been speculated to play a role in dispersal behavior in EPNs. This hypothesis was tested by evaluating the behavioral responses of five different species of EPNs to prenol both as a distal-chemotactic cue and as a dispersal cue. The results indicate that prenol acted as a repulsive agent for all five species tested, while only two species responded to prenol as a dispersal cue.

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Maass, Kendra K., Mieke Roosen, Julia Benzel, et al. "EPEN-44. EXTRACELLULAR VESICLES OF SUPRATENTORIAL EPENDYMOMA RELA MEDIATE INTERACTIONS WITH CELLS OF THE TUMOR MICROENVIRONMENT." Neuro-Oncology 22, Supplement_3 (2020): iii316—iii317. http://dx.doi.org/10.1093/neuonc/noaa222.178.

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Abstract Ependymal tumors (EPNs) account for ~10% of all pediatric brain tumors. Supratentorial EPN characterized by RELA fusions (ST-EPN-RELA) and posterior fossa EPN group A (PF-EPN-A) form the two most frequent molecular groups, both of which are associated with poor prognosis and for which only limited therapeutic options are available. Since pediatric EPNs have a relatively low mutational burden, identification and characterization of tumor-associated pathways and molecular processes is of critical importance to inform potential therapeutic targets. Previous transcriptional studies implicated aberrant vesicular pathways in ST-EPN-RELA, prompting further investigation into their putative role in EPN pathogenesis. To this aim, we isolated extracellular vesicles (EVs) of ST-EPN-RELA patient derived cell lines and performed protein mass spectrometry. The specific ST-EPN-RELA EV protein content resembles the parental cells as well as primary tumors. Promising candidates to be transferred by ST-EPN-RELA EVs but not control EVs were associated with unfolded protein response and endoplasmic reticulum stress. When uptaken by recipient cells of the tumor microenvironment, brain endothelial cells or microglia, ST-EPN-RELA EVs induced proliferation and had a chemoattractant effect towards the tumor. ST-EPN-RELA EVs stimulated angiogenesis of brain endothelial cells potentially by the transfer of ER stress proteins. Uptake of ST-EPN-RELA EVs by microglia changed their activation status indicating a tumor promoting function through EV transfer. Therefore, we hypothesize that vesicular pathways play an important role in the pathogenesis of pediatric ST-EPN-RELAs and that an improved understanding may promote new therapeutic opportunities.

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Peña, Jennifer M., Mayra A. Carrillo, and Elissa A. Hallem. "Variation in the Susceptibility of Drosophila to Different Entomopathogenic Nematodes." Infection and Immunity 83, no. 3 (2015): 1130–38. http://dx.doi.org/10.1128/iai.02740-14.

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Entomopathogenic nematodes (EPNs) in the generaHeterorhabditisandSteinernemaare lethal parasites of insects that are of interest as models for understanding parasite-host interactions and as biocontrol agents for insect pests. EPNs harbor a bacterial endosymbiont in their gut that assists in insect killing. EPNs are capable of infecting and killing a wide range of insects, yet how the nematodes and their bacterial endosymbionts interact with the insect immune system is poorly understood. Here, we develop a versatile model system for understanding the insect immune response to parasitic nematode infection that consists of seven species of EPNs as model parasites and five species ofDrosophilafruit flies as model hosts. We show that the EPNSteinernema carpocapsae, which is widely used for insect control, is capable of infecting and killingD. melanogasterlarvae.S. carpocapsaeis associated with the bacteriumXenorhabdus nematophila, and we show thatX. nematophilainduces expression of a subset of antimicrobial peptide genes and suppresses the melanization response to the nematode. We further show that EPNs vary in their virulence towardD. melanogasterand thatDrosophilaspecies vary in their susceptibilities to EPN infection. Differences in virulence among different EPN-host combinations result from differences in both rates of infection and rates of postinfection survival. Our results establish a powerful model system for understanding mechanisms of host-parasite interactions and the insect immune response to parasitic nematode infection.

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Dissertations / Theses on the topic "EPNN"

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Burns, Alexis Meashal. "Engineering Approaches to Control and Prediction of Upper Extremity Movement." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1552238907400524.

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Rodrigues, Carla Iolanda Costa. "Photonic integrated circuits for NG-EPON." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/22732.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>Along with privacy and security, the growth of demand from the consumer for higher bandwidth presents one of the most important modern challenges in telecommunications infrastructures. The researchers were encouraged to nd not only e cient but also the economically viable solutions capable of meeting the growing needs of the consumer. Optical communications are the way that can accompany this growth. The Passive Optical Network (PON) is an architecture that shares the ber bandwidth among several users. There has been a constant study under this topic for the purpose of using all the ber abilities and to nd new solutions to keep the access network simple. Photonic Integrated Circuits (PICs) are a technology that emerged to help the complexity of the hardware that exists nowadays. It is a single chip capable of integrating numerous optical components, which leads to a reduced complexity, size and power consumption. These are the important characteristics that make the PICs a powerful tool to use in several applications. This dissertation presents a monolithic PIC transceiver in the context of Next Generation of Ethernet Passive Optical Network (NG-EPON) which aims to design and implement integrated optical circuits for future access networks. The transceiver architecture is able to be used as an Optical Network Unit (ONU) with a 4 channels approach for 100 Gb/s solutions. The present work contributed for the FUTPON project supported by P2020.<br>Em par com a privacidade e segurança, a crescente procura do consumidor por maiores larguras de banda apresenta um dos mais importantes desafios modernos das infraestruturas de telecomunicações. Esta procura incentiva assim a investigação de novas soluções não são eficientes, mas também economicamente viáveis, capazes de satisfazer as crescentes necessidades do consumidor. As comunicações óticas apresentam ser o meio apropriado para acompanhar este crescimento. A Rede Óptica Passiva (PON) e uma arquitectura usada para distribuição de fibra ótica ate ao consumidor final. Esta tecnologia permite dividir a largura de banda de uma única fibra por diferentes clientes. Tem havido um estudo constante no âmbito deste tópico para conseguir tirar máximo partido das capacidades da fibra e de modo a encontrar novas soluções para tornar este método mais simples. Os Circuitos Oticos Integrados (PIC) sao uma tecnologia que surge para ajudar na complexidade do hardware existente hoje em dia. Consiste num único chip capaz de integrar vários componentes óticos, o que leva a uma diminuição da complexidade, tamanho e redução do consumo de energia. Estas características fazem com que seja uma tecnologia vantajosa para uso em diferentes aplicações. O desenho e a implementação da arquitectura do transrecetor em formato PIC no contexto da Next Generation of Ethernet Passive Optical Network (NG-EPON), e o principal objectivo desta dissertação onde visa o desenvolvimento circuitos óticos integrados para redes oticas de acesso futuras. Esta arquitectura devera ser utilizada como Optical Network Unit (ONU) contendo 4 canais para atingir 100 Gb/s. Este trabalho contribuiu para o projecto FUTPON suportado pelo P2020.

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Middleton, Duncan George. "First study of the (e,ep'n) reaction." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275626.

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Rodrigues, José Pedro Oliveira. "Study and test of an EPON network." Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/7656.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>O rápido crescimento do acesso a internet de banda larga, e o consumo de novos conteúdos tem levado os operadores a apostarem fortemente nas redes ópticas passivas de acesso. Essa aposta pretende chegar ao maior numero e diversidade de utilizadores possível. Para aumentar a capacidade das redes existentes, bem como diminuir o seu custo, foram criadas normas que regulam a criação de equipamentos para esse efeito. Ao longo deste documento são abordadas as normas e respectivos requisitos para implementação deste tipo de redes, quer da tecnologia EPON quer da tecnologia GPON, bem como ainda das tecnologias mais recentes que sucedem as primeiras, as redes 10G-EPON e XG-PON. Com base num protótipo apresentado numa dissertação de 2010 vai ser caracterizado o dispositivo, apresentados melhoramentos e vai ser comprovado o seu funcionamento em diversos cenários.<br>The rapid growth of broadband internet access, and the consumption of new services, has led the operators to strongly bet in optical passive networks. This commitment aims to reach as greatest number and diversity of users as possible. To increase the capacity of the existing networks, while decreasing its cost, standards were created to regulate the creation of devices for this purpose. Throughout this document it is discussed the standards and their requirements for the implementation of this kind of networks, whether EPON or GPON technology, as well as the latest technologies which replace the former, 10G-EPON and XG-PON. Based on a prototype presented in a dissertation of 2010 the device will be characterized, improved and it will be proved its operation in various scenarios.

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Dias, Mariana Piquet 1986. "Quality of service provisioning in integrated EPON-WiMAX networks = Provisão de qualidade de serviço em redes integradas EPON-WiMAX." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275524.

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Orientador: Nelson Luis Saldanha da Fonseca<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação<br>Made available in DSpace on 2018-08-25T17:13:03Z (GMT). No. of bitstreams: 1 Dias_MarianaPiquet_M.pdf: 2697015 bytes, checksum: e75eb77b1ae845a87855964ffc631132 (MD5) Previous issue date: 2013<br>Resumo: A demanda por acesso a Internet banda larga tem crescido devido ao aumento da demanda por banda passante pelas aplicações que exigem altas taxas de transmissão de dados como vídeo sobre IP (IPTV) e jogos interativos. Para atender a esta demanda, tecnologias de acesso banda larga vem sendo, rapidamente, desenvolvidas. Tecnologias cabeadas em bra oferecem banda larga a altíssimas taxas, porém são custosas. Por outro lado, tecnologias de rede sem o oferecem mobilidade, porém operam a menores taxas de transmissão a baixo custo de implantação. Apesar destas vantagens, tecnologias sem o operam em espectro limitado, o que limita a banda alocável a cada usuário. A integração de redes WiMAX com redes EPON combina a grande quantidade de banda disponível em redes de acesso óptica com a mobilidade das tecnologias de rede sem o. Nesta integracão, um escalonador de banda WiMAX precisa levar em consider- ação a variabilidade da banda fornecida pelo escalonador EPON. Este trabalho propõe um mecanismo de escalonamento WiMAX chamado Decit Based QoS Uplink Scheduler (DBQUS), compatível com o padrão IEEE 802.16 e desenvolvido para a ONU-BS da rede EPON. Experimentos de simulação foram realizados para avaliação do escalonador DBQUS. Interleaved Polling with Adaptive Cycle Time) é usado na parte O escalonador proposto é apto a garantir QoS (Quality of service) para O algoritmo IPACT ( EPON da rede. as estações cliente WiMAX mesmo quando a quantidade de banda disponível é insuciente para prover os requisitos de QoS de todas as conexões WiMAX. Resultados mostraram que o escalonador DBQUS é eciente na distribuição de largura de banda entre as estações cliente WiMAX, independentemente do tempo de ciclo da rede EPON<br>Abstract: The demand for broadband Internet access has grown due to the increasing demand for bandwidth by applications that require high rates such as video over IP (IPTV) and interactive gaming. To meet this demand, broadband access technologies, have been developed. Fiber cabled technologies oers high-speed access but with at high cost. On the other hand, wireless networks support mobility and demands low deployment cost but low rate transmission. Besides these advantages, wireless technologies access a limited spectrum, shared by multiple users which limite the bandwidth allocated to each user on the convergence of network access. The integration of WiMAX and EPON networks combine the large bandwidth avail- able in optical access networks with the mobility of wireless network technologies. In this integration, a WiMAX bandwidth scheduler must consider the variability of bandwidth provided by EPON scheduler. This work proposes WiMAX scheduling mechanism called Decit-Based QoS Uplink Scheduler (DBQUS) which was developed for the ONU-BS in EPON network. Simulations were conducted to evaluate the DBQUS scheduler. The Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm is used in the EPON network. Results show that the proposed scheduler is able to guarantee QoS (Quality of Service) for WiMAX sta- tions even when the amount of bandwidth available is insucient to provide the WiMAX QoS requirements to all connections. Dierent simulations also showed that the DBQUS scheduler eciently distributes bandwidth between the WiMAX stations, under dierent EPON cycle times<br>Mestrado<br>Ciência da Computação<br>Mestra em Ciência da Computação

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Sarischoulis, Efstratios. "Schicksal, Götter und Handlungsfreiheit in den Epen Homers." Stuttgart Steiner, 2007. http://d-nb.info/98692265X/04.

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Arbieto, Carmen Orencia Carrasco. "Alocação dinâmica de largura de banda em redes EPON." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-28082007-154900/.

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As redes de telecomunicações se dividem em redes de longa distância, redes metropolitanas e redes de acesso. As redes de longa distância e metropolitana usufruem a alta capacidade de largura de banda da fibra óptica, enquanto nas redes de acesso há um gargalo de largura de banda por causa do uso de pares de fios e cabo coaxial. Para solucionar este problema e oferecer aos usuários acesso banda larga de baixo custo foram propostas as redes ópticas passivas (passive optical network - PON). A PON é formada por dois elementos básicos, a unidade de rede óptica (optical network unit - ONU), localizada perto dos assinantes, e o terminal de linha óptica (optical line terminal - OLT), localizado próximo ao provedor de serviços. Dentre os padrões disponíveis para redes PON, o Ethernet (EPON), padronizado pelo grupo IEEE 802.3ah, é opção atraente porque ele é bastante difundido nas redes locais. O protocolo de controle multiponto (multipoint control protocol - MPCP), já especificado, é responsável pelo controle de acesso ao meio, fornecendo infra-estrutura de sinalização para transmissão entre OLT e ONUs. Entretanto, o algoritmo de alocação de largura de banda, que realiza o controle de acesso ao meio com base no MPCP, foi considerado fora do escopo de trabalho do grupo de trabalho, permitindo que seja desenvolvido pelos fornecedores de equipamentos. Neste trabalho, arquiteturas de rede EPON e o protocolo MPCP são descritos e algoritmos de alocação de largura de banda são avaliados mediante simulação computacional. São abordados os algoritmos de alocação de largura de banda que integram multiplexação estatística e técnicas para o suporte a classes de serviços diferenciados, com base no esquema de multiplexação por divisão no tempo (time division multiplexing - TDM). Algoritmos que integram a multiplexação por divisão em comprimento de onda (wavelength division multiplexing - WDM) à arquitetura EPON TDM são também investigados. Os algoritmos WDM-TDM permitem a atualização progressiva da EPON que emprega o esquema TDM para WDM.<br>Telecommunication networks are divided into core, metropolitan and access networks. The core and metropolitan networks use high capacity bandwidth optical fibers, while the access networks have bandwidth bottlenecks because of the use of twisted-pair wires and coaxial cable. To solve this problem and to offers the users broadband access at low cost the use of passive optical networks (PON) is proposed. A PON is formed by two basic elements, the optical network unit (ONU), positioned close to the customers and the optical line terminal (OLT), located close to the service provider. Within the available standards for PON networks, the Ethernet (EPON), standardised by the IEEE group 802.3ah, is an attractive option because it is already widely used in local networks. The multipoint control protocol (MPCP), already specified, is responsible for the media access control, providing signaling infrastructure for transmission between OLT and ONUs. However, the bandwidth allocation algorithm, that controls access based on MPCP, was considered outside the scope of the work group, permitting that this be developed by equipment providers. In this work, EPON architectures and the MPCP protocol are described and bandwidth allocation algorithms are evaluated with computational simulation. Bandwidth allocation algorithms which integrate statistical multiplexing and techniques to support for differentiated classes of service, based on time division multiplexing (TDM) scheme are investigated. Algorithms that integrate wavelength division multiplexing (WDM) to the EPON TDM architecture are also investigated. The WDM-TDM algorithms permit the progressive upgrade of EPON based TDM to WDM schemes.

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Astudillo, Trujillo Carlos Alberto 1985. "Provisão de qualidade de serviço em redes integradas LTE-EPON." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275556.

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Orientadores: Nelson Luis Saldanha da Fonseca, Juliana Freitag Borin<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação<br>Made available in DSpace on 2018-08-27T14:47:59Z (GMT). No. of bitstreams: 1 AstudilloTrujillo_CarlosAlberto_M.pdf: 2488879 bytes, checksum: 5004b31fcfcabbbf8528fe73f484da7d (MD5) Previous issue date: 2015<br>Resumo: A crescente demanda por acesso banda larga móvel tem motivado a implantação da tecnologia long term evolution (LTE) pelas operadoras de redes móveis (MNOs), permitindo o fornecimento de novos serviços que demandam alta largura de banda e requisitos rigorosos de qualidade de serviço (QoS). Este aumento da demanda de banda passante leva à necessidade de um grande número de estações rádio base e ao aumento na quantidade de tráfego injetado no backhaul da rede móvel (MBH). Para lidar com os elevados custos do MBH, redes ópticas passivas (PONs) podem ser usadas para reduzir os custos do MBH usando sistemas fiber to anywhere (FTTx) já implantado bem como lidar com a crescente demanda por acesso banda larga à Internet por usuários móveis. Além disso, a estação rádio base LTE, também conhecida como evolved NodeB (eNB), pode ser integrada à unidade de rede óptica (ONU) das PONs em um dispositivo único, chamado ONU-eNB. A ONU-eNB compete pela largura de banda com outras ONUs em PONs, o que pode potencialmente prejudicar o fornecimento de QoS aos usuários móveis. Esta dissertação propõe um framework para provisão de QoS em redes móveis LTE que empregam backhaul baseado em redes ópticas passivas Ethernet (EPONs). Propõe também, um escalonador para redes LTE com o objetivo de prover requisitos de QoS e melhorar a vazão total. O framework introduz uma arquitetura funcional para o dispositivo integrado ONU-eNB, um esquema de mapeamento de QoS e um método para permitir que os escalonadores LTE atuais possam levar em conta informações disponíveis da rede de acesso móvel (LTE) bem com informações sobre a rede de backhaul (EPON), a fim de melhorar o desempenho total da rede, especialmente quando o enlace de backhaul está congestionado. Mostra-se como a implementação do framework proposto melhora a utilização da rede e a provisão de QoS em uma rede integrada, mesmo sob variação da carga de tráfego no backhaul e na rede LTE<br>Abstract: The increasing demand for mobile broadband access has motivated mobile network operators (MNOs) to deploy the long term evolution (LTE) technology, which allows the support of new services demanding large amount of bandwidth and strict QoS requirements. The growth of bandwidth demands will increase dramatically the number of base stations and the amount of traffic injected into the mobile backhaul (MBH) network. To cope with the high cost of MBH networks, passive optical networks (PONs) can be employed by using the already deployed fiber to anywhere (FTTx) systems. Moreover, the LTE base station, also known as evolved NodeB (eNB), can be integrated with the optical network unit (ONU) in a single device, called ONU-eNB, which competes for bandwidth with other ONUs in PONs. Such competition for bandwidth can jeopardize the support of mobile users¿ quality of service (QoS) requirements. This dissertation proposes a QoS provisioning framework for LTE mobile networks employing Ethernet PON (EPON)-based backhaul. It also introduces a novel LTE scheduler with the aim of supporting QoS requirements as well as high throughput. The framework includes a functional architecture for the ONU-eNB, a QoS mapping scheme and a method to allow current LTE schedulers to take into account both information available from the mobile access network (LTE) and information from the backhaul network (EPON) in order to improve the overall network performance, specially when the backhaul link is congested. It is shown how the proposed framework can improve network utilization and quality of service provisioning in an integrated network even under variations of traffic load in the backhaul and in the LTE networks<br>Mestrado<br>Ciência da Computação<br>Mestre em Ciência da Computação

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Jayaraman, Shankar. "Dynamic cutback optimization." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33812.

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The focus of this thesis is to develop and evaluate a cutback noise minimization process - also known as dynamic cutback optimization - that considers engine spool down during thrust cutback and is consistent with ICAO and FAR Part 36 noise certification procedures. Simplified methods for flyover EPNL prediction used by propulsion designers assume instantaneous thrust reduction and do not take into account the spooling down of the engine during the cutback procedure. The thesis investigates if there is an additional noise benefit that can be gained by modeling the engine spool down behavior. This in turn would improve the margin between predicted EPNL and Stage 4 noise regulations. Modeling dynamic cutback also impacts engine design during the preliminary and detailed design stages. Reduced noise levels due to cutback may be traded for lower engine fan diameter, which in turn reduces weight, fuel burn, and cost.

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Tack, Jeremy Lee. "Thermodynamic and mechanical properties of EPON 862 with curing agent DETDA by molecular simulation." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1069.

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Books on the topic "EPNN"

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms Verlag, 1994.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms Verlag, 1998.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms Verlag, 2000.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Olms, 1994.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms, 2004.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms, 1997.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Olms, 1996.

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Radivojević, Mirjana, and Petar Matavulj. The Emerging WDM EPON. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54224-9.

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La, Motte-Fouqué Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms Verlag, 1994.

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La Motte-Fouqué, Friedrich Heinrich Karl. Ausgewählte Dramen und Epen. Georg Olms Verlag, 1996.

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Book chapters on the topic "EPNN"

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Gooch, Jan W. "Epon." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4458.

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Radivojević, Mirjana, and Petar Matavulj. "Multichannel EPON." In The Emerging WDM EPON. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54224-9_5.

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Radivojević, Mirjana, and Petar Matavulj. "Single-Channel EPON." In The Emerging WDM EPON. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54224-9_4.

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Radivojević, Mirjana, and Petar Matavulj. "WDM EPON Architecture." In The Emerging WDM EPON. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54224-9_6.

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Ansari, Nirwan, and Jingjing Zhang. "Media Access Control and Resource Allocation in EPON and 10G-EPON." In Media Access Control and Resource Allocation. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3939-4_4.

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Landfester, Ulrike. "Goethe, Johann Wolfgang von: Epen." In Kindlers Literatur Lexikon (KLL). J.B. Metzler, 2020. http://dx.doi.org/10.1007/978-3-476-05728-0_6473-1.

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Nikoukar, AliAkbar, I.-Shyan Hwang, and Andrew Tanny Liem. "Efficient IPTV Delivery over EPON." In IPTV Delivery Networks. John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119397939.ch3.

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Shen, Gangxiang, and Rodney S. Tucker. "Integration of EPON and WiMAX." In Optical Networks. Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-92131-0_14.

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Lindsey, Geoff. "Chapter 17 Epen-t-thesis." In English After RP. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04357-5_18.

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Werner, Hans-Georg. "Zur Modernität von Lenaus Epen." In Literarische Strategien. J.B. Metzler, 1993. http://dx.doi.org/10.1007/978-3-476-03460-1_19.

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Conference papers on the topic "EPNN"

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Knittle, Curtis. "IEEE 50 Gb/s EPON (50G-EPON)." In Optical Fiber Communication Conference. OSA, 2020. http://dx.doi.org/10.1364/ofc.2020.th1b.2.

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Gataulina G.G., G. G., and S. E. Pilipenko S.E. "Effect of biologically active substances on the pod formation of soybean plants in the Moscow region." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-48.

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The effect of biologically active substances Siliplant, Zircon and Epin-Extra on the formation of soybean productivity elements was studied in a field experiment carried out at the Field Experimental Station of the Russian State Agricultural University named after K.A. Timiryazev in 2020. The number of pods on average per plant increased in the variant Zircon by 17%, Siliplant and Epin-Extra by 9 and 11%, respectively. The number of pods on the main stable significantly increased by 9% compared to the control only when the plants were treated with Zircon. The number of pods on the lateral branches exceeded the control by 27 and 43% in the variants Epin-Extra and Zircon.

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Roy, Rajesh, Marek Hajduczenia, Glen Kramer, and Henrique J. A. da Silva. "10G-EPON efficiency." In 2009 IEEE 3rd International Symposium on Advanced Networks and Telecommunication Systems (ANTS). IEEE, 2009. http://dx.doi.org/10.1109/ants.2009.5409861.

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Ford, Douglas V. "Early Public Notification." In 1998 2nd International Pipeline Conference. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/ipc1998-2113.

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In response to public pressure and in a desire to ensure that the public was adequately informed about potential projects, the National Energy Board (NEB) produced a Memorandum of Guidance with respect to its expectations regarding its Early Public Notification (EPN) program in 1990. Over time, issues such as Stress Corrosion Cracking, Risk Assessment, Pipeline Integrity and Landowner Compensation have all significantly impacted the way companies have adjusted their approaches to the delivery of EPN programs. In the future, the pipeline industry can expect that public consultation programs will increasingly become an essential component on both project specific and long range strategic communications planning. The purpose of this paper is to review the development and implementation of the EPN process and to propose future issues which may impact the planning and execution of consultation programs. The focus of this paper will be to: A. Profile the evolution and delivery of EPN programs and review the communications tools typically used with EPN programs; B. Examine the recent emergence of regional landowner interest groups and to review their effect on the regulatory process and issues such as pipeline integrity, pipeline safety and environmental stewardship; C. Review how the pipeline industry has responded to public, Board and government initiatives regarding intervenor funding, and; D. Provide insight into future EPN delivery systems as well as emerging trends with respect to public participation in the pipeline and resource sector.

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Hajduczenia, Marek, Henrique J. A. da Silva, and Paulo P. Monteiro. "10G EPON Development Process." In 2007 9th International Conference on Transparent Optical Networks. IEEE, 2007. http://dx.doi.org/10.1109/icton.2007.4296087.

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Masaharu Hattori, Keiji Tanaka, and Yukio Horiuchi. "EPON-based intranet system." In 2008 Joint Conference of the Opto-Electronics and Communications Conference (OECC) and the Australian Conference on Optical Fibre Technology (ACOFT). IEEE, 2008. http://dx.doi.org/10.1109/oeccacoft.2008.4610607.

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Caltabiano, Greg. "Next Generation EPON ASIC." In Asia Optical Fiber Communication and Optoelectronic Exposition and Conference. OSA, 2008. http://dx.doi.org/10.1364/aoe.2008.fc3.

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Oishi, Masayuki, Ryo Inohara, Akira Agata, and Yukio Horiuchi. "Reconfigurable multiport EPON repeater." In Asia Communications and Photonics, edited by Dominique Chiaroni. SPIE, 2009. http://dx.doi.org/10.1117/12.852144.

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Bernaerts, Maia. "FTTH: APON vs EPON." In 19th Congress of the International Commission for Optics: Optics for the Quality of Life, edited by Giancarlo C. Righini and Anna Consortini. SPIE, 2003. http://dx.doi.org/10.1117/12.527755.

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Chen, Hong, Li Su, Depeng Jin, and Lieguang Zeng. "Research on EPON survivability." In Asia-Pacific Optical and Wireless Communications, edited by S. J. Ben Yoo, Kwok-wai Cheung, Yun-Chur Chung, and Guangcheng Li. SPIE, 2004. http://dx.doi.org/10.1117/12.520339.

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Reports on the topic "EPNN"

1

Khermosh, L. Managed Objects of Ethernet Passive Optical Networks (EPON). RFC Editor, 2007. http://dx.doi.org/10.17487/rfc4837.

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Fredenburg, David A., John Michael Lang, Dana Mcgraw Dattelbaum, and Langdon Stanford Bennett. (U) Design Considerations for Obtaining Deep Release in Reacted Epon 828. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1242894.

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Pisa, Matthew Alexander, David A. Fredenburg, Dana M. Dattelbaum, John Michael Lang, and Donald Leon Sandoval. Shock and Release Response of Unreacted Epon 828: Shot 2s-905. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1334084.

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Kruizenga, Alan Michael, and Bernice E. Mills. Thermal degradation of new and aged urethane foam and epon 826 epoxy. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1115316.

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Lyles, Brad, Jenny Chapman, and David Gillespie. Investigations in Well EPNG 10-36 at the Gasbuggy Nuclear Test Site, Rio Arriba County, New Mexico. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/821948.

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NIOSH skin notation (SK) profile: ethyl p-nitrophenyl phenylphosphorothioate (EPN) [CAS No. 2104-64-5]. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2017. http://dx.doi.org/10.26616/nioshpub2017136.

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