Littérature scientifique sur le sujet « Metro C »
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Articles de revues sur le sujet "Metro C"
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Aqib, Muhammad, Rashid Mehmood, Ahmed Alzahrani, Iyad Katib, Aiiad Albeshri et Saleh M. Altowaijri. « Rapid Transit Systems : Smarter Urban Planning Using Big Data, In-Memory Computing, Deep Learning, and GPUs ». Sustainability 11, no 10 (14 mai 2019) : 2736. http://dx.doi.org/10.3390/su11102736.
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Rapid transit systems or metros are a popular choice for high-capacity public transport in urban areas due to several advantages including safety, dependability, speed, cost, and lower risk of accidents. Existing studies on metros have not considered appropriate holistic urban transport models and integrated use of cutting-edge technologies. This paper proposes a comprehensive approach toward large-scale and faster prediction of metro system characteristics by employing the integration of four leading-edge technologies: big data, deep learning, in-memory computing, and Graphics Processing Units (GPUs). Using London Metro as a case study, and the Rolling Origin and Destination Survey (RODS) (real) dataset, we predict the number of passengers for six time intervals (a) using various access transport modes to reach the train stations (buses, walking, etc.); (b) using various egress modes to travel from the metro station to their next points of interest (PoIs); (c) traveling between different origin-destination (OD) pairs of stations; and (d) against the distance between the OD stations. The prediction allows better spatiotemporal planning of the whole urban transport system, including the metro subsystem, and its various access and egress modes. The paper contributes novel deep learning models, algorithms, implementation, analytics methodology, and software tool for analysis of metro systems.
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Quqing, Gao. « Metro tunnelling in China ». Tunnelling and Underground Space Technology 5, no 3 (janvier 1990) : 271–75. http://dx.doi.org/10.1016/0886-7798(90)90015-c.
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Oliveros, Jervie, Edgar Vallar et Maria Galvez. « Investigating the Effect of Urbanization on Weather Using the Weather Research and Forecasting (WRF) Model : A Case of Metro Manila, Philippines ». Environments 6, no 2 (24 janvier 2019) : 10. http://dx.doi.org/10.3390/environments6020010.
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The effect of urbanization of Metro Manila, particularly on the amount of sensible heat flux, rainfall and temperature of selected urban and rural areas, was investigated using the Weather Research and Forecasting Version 3.4.1 (WRFV3.4.1) model. National Center for Environmental Prediction - Final (NCEP-FNL) grib1 data from 2000 to 2010 were used as inputs into the model for meteorological data. The Mann–Kendall trend test (M–K test) was utilized to verify the significance of the trends while Sen’s slope estimator was used to quantify the measured trends. Results showed that, on average, the sensible heat flux of Metro Manila is about 1.5 × 108 Jm−2 higher than in selected areas outside Metro Manila. The occurrence of an urban heat island (UHI) effect was detected in Metro Manila by comparing the difference in the minimum and maximum temperatures. For the selected urban and rural areas, the minimum and maximum temperature differences (relative to Metro Manila) are around 0.4 to 2.4 °C and 0.83 to 2.3 °C, respectively. Metro Manila recorded higher 11-year average values of rainfall during the summer season (8% to 64%), rainy season (15% to 305%), and transition season (8% to 232%) when compared with selected areas from 25 to 100 km from Manila. These results show that the sensible heat flux, temperature and rainfall in Metro Manila is affected by Metro Manila’s urbanization.
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Li, Yu, et Le Xia Dong. « Research on Decreasing Temperature Technology of Emergency Rescue in Metro Fire ». Advanced Materials Research 368-373 (octobre 2011) : 1196–200. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.1196.
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Decreasing the temperature of fire field is one of the most important technologies of metro fire emergency rescue. It is calculated that the total heat is released in metro fire and the mass of ice, liquid nitrogen and dry ice are needed when the temperature is decreased to 60°C. Ice is the best option among the three through comprehensive analysis from mass, volume, transportation, storage and so on. Research on cooling technology of emergency rescue in metro fire can do contribution to reduce metro fire casualties.
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Wang, Hong De, et Tie Jun Cui. « Simulation Analysis of Metro Station Construction Fire Based on FDS ». Advanced Materials Research 446-449 (janvier 2012) : 2093–96. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.2093.
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Taking the Hongqi west road station construction of Dalian metro line 2 as an example, the regularities of the temperature and the smoke concentration distribution are analyzed. Basing on FDS, the simulation model of the metro station fire is set up. Assume six fire points in the station to simulate the smoke diffusion velocity and the personnel evacuation time in fire. Results show that the chimney effect is obvious at the back of the station. The highest temperature of every export is 180°C and the lowest temperature is 40°C during the effective duration. The time duration can meet the needs of the personnel evacuation from the fire metro station. Basing on the analysis of variation of the smoke flows and the temperature, the metro station project is reasonable.
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Rennack, Sebastian. « Metro wächst in Russland mit E-Food ». Lebensmittel Zeitung 73, no 25 (2021) : 10. http://dx.doi.org/10.51202/0947-7527-2021-25-010-1.
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Der russische E-Food-Markt ist im Corona-Jahr explodiert. Etablierte Händler und neue Pure Player kämpfen um Marktanteile. Der Staat mischt als einer der Hauptakteure mit, aber auch Metro C+C ist mittendrin.
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Landolfi, Luciano. « Metro e forma. Lettura di Hor. c. I, 11 ». L'antiquité classique 64, no 1 (1995) : 217–35. http://dx.doi.org/10.3406/antiq.1995.1232.
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Paolucci, F., R. Emmerich, A. Eira, N. Costa, J. Pedro, P. Wilke Berenguer, C. Schubert et al. « Disaggregated edge-enabled C+L-band filterless metro networks ». Journal of Optical Communications and Networking 12, no 3 (13 décembre 2019) : 2. http://dx.doi.org/10.1364/jocn.12.000002.
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Chen, Shaokuan, Yue Di, Shuang Liu et Baoshan Wang. « Modelling and Analysis on Emergency Evacuation from Metro Stations ». Mathematical Problems in Engineering 2017 (2017) : 1–11. http://dx.doi.org/10.1155/2017/2623684.
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Efficient calculation on passenger evacuation performances under emergencies is crucial to the planning, design, and operation of metro systems as it is closely related to the safety of human lives. Four calculation methodologies including the China CDM, NFPA 130, control volume, and M/G/c/c models and a multiagent-based simulation approach are employed to calculate the evacuation time under a given number of evacuees in different application backgrounds by investigating impact factors and strategies of evacuation as well as moving speed of evacuees. The M/G/c/c model and multiagent-based simulation approach are also used to identify the bottleneck of evacuation in metro stations. A case study for the Xizhimen metro station in Beijing is carried out to validate the effectiveness of these methodologies to planners, designers, and operators in practice. The results show that the former two methodologies are concise quantitative methods while the latter ones are more capable of assessing the whole process and details of evacuation.
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Cahyahati, Syendita Dwi, Ktut Murniati et Zainal Abidin. « PROFITABILITAS DAN NILAI TAMBAH AGROINDUSTRI OLAHAN IKAN LELE DI KECAMATAN METRO SELATAN KOTA METRO ». Jurnal Ilmu-Ilmu Agribisnis 7, no 4 (16 avril 2020) : 451. http://dx.doi.org/10.23960/jiia.v7i4.3859.
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This study aims to analyze profitability and added value of catfish processing products. This research is case studies on La Tansa, Oseri and Osta Food Agroindustry for the reason of that catfish processing products are one of the regional superior products in Metro City. The study was conducted in February-March 2018 in which data was analyzed by quantitative analysis. The results showed that profitability ratios obtained by La Tansa Agroindustry was 48.27% in abalone catfish products and 23.58% in catfish bone crackers products. Whereas the profitability ratios of Agroindustry Oseri amounted to 51.14% in abalone catfish products and 34.62% in catfish bone crackers products. The revenue from the total cost per month in La Tansa Agroindustry was Rp2,174,546.67 on abalone catfish products and Rp518,161.67 in catfish bone crackers products. Whereas, Agroindustry Oseri Rp5,617,646.62 on abalone catfish products and Rp2,188,286.71 on catfish bone crackers products. Both agroindustry were feasible because they had positive added value and were profitable because the R / C ratio was more than one. Key words : added value, agroindustries, catfish, profitability
Thèses sur le sujet "Metro C"
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Pancaldi, Davide. « Analisi di interazione tra la linea Metro C e le Mura Aureliane : il caso del pozzo multifunzionale di Porta Asinaria ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7572/.
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La tesi ha natura sperimentale ed è mirata alla valutazione, attraverso l’uso di un programma agli elementi finiti tridimensionale, dell’interazione tra lo scavo del pozzo di introduzione scudi e le Mura Aureliane adiacenti a Porta Asinaria, a Roma.
La prima parte della tesi si è concentrata sulla caratterizzazione geotecnica, a partire dai dati ricavati dalle campagne d’indagine eseguite nel tempo. Una volta effettuata la caratterizzazione geotecnica si è passati alla calibrazione del modello costitutivo per il terreno; si è scelto di adottare un legame costitutivo elasto-plastico incrudente, l’Hardening Soil Model with Small Strain Stiffness.
Si è quindi passati alla definizione geometrica e dei materiali, utilizzando i rilievi strutturali e topografici, e alla conseguente definizione dei parametri del modello costitutivo adottato per la muratura e per il nucleo interno. In questo caso è stato adottato il modello di Mohr-Coulomb.
La geometria globale è stata infine importata dal programma di calcolo PLAXIS 3D a partire da un modello tridimensionale realizzato con il programma Autocad Civil 3D. L'analisi agli elementi finiti ha valutato la realizzazione di diverse configurazioni possibili riguardanti la modellazione del pozzo e di eventuali opere di mitigazione degli effetti, quali lo sbancamento a tergo delle Mura e il successivo rinterro, a scavo ultimato.
Si è inoltre analizzata l’influenza provocata da un possibile degrado della muratura.
In ultimo sono stati analizzati e commentati i risultati di ciascun’analisi eseguita, in termini di stati deformativi e tensionali, ponendo l’attenzione sulle differenze di comportamento rilevate nelle diverse configurazioni adottate.
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Cabral, Carlos Ernani de Araujo Tinoco. « Efic?cia do treinamento de for?a sobre par?metros cardiovasculares e antropom?tricos em adultos sedent?rios ». Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13369.
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Previous issue date: 2012-03-16This study aimed to determine the influence of strength training (ST), in three weekly sessions over ten weeks, on cardiovascular parameters and anthropometric measurements. It is a before and after intervention trial, with a sample composed of 30 individuals. Participants were adults aged between 18 and 40 years, from both sexes and sedentary for at least three months previously. Tests were computed ergospirometry, CRP, PWV and body composition (dependent variables) before and after the experiment. Independent variables, age and sex, were considered in order to determine their influence on the dependent variablesevaluatedend. By comparing the initial cardiovascular parameters with those obtained after intervention in patients undergoing the ST proposed (a Student s t-test was conducted within each group for samples matched to parameters with normal distribution, while the Wilcoxin was applied for those without), there was no significant difference in PWV(p =0469) or PCR(p =0.247), but there was an increase in anaerobic threshold(AT) (p=0.004) and Maximal Oxygen Uptake(VO2max) (p =0.052). In regard to anthropometric measures, individuals significantly reduced their body fat percentage (p<0.001) and fat mass (p<0,001), as well as increasing lean mass (p<0.001). However, no changes were recorded in the waist-to-hip ratio (WHR) (p= 0.777), body mass (p=0.226) or body mass index (BMI) (p =0.212). Findings of this study lead us to believe that the proposed ST, and did not increase the VOP or PCR improves cardiorespiratory capacity and body composition. Devotees of this training can therefore safely enjoy all its benefits without risk to the cardiovascular system
O objetivo desse estudo foi verificar a influ?ncia do TF, com frequ?ncia de tr?s sess?es semanais e dura??o de dez semanas, sobre par?metros cardiovasculares e antropom?tricos. Trata-se de um estudo de interven??o do tipo antes-depois, cuja amostra foi composta por 30 indiv?duos. Os mesmos eram adultos com idade compreendida entre 18 e 40 anos, de ambos os sexos e sedent?rios h? pelo menos tr?s meses. Foram realizados os testes da ergoespirometria computadorizada, PCR, VOP e composi??o corporal (vari?veis dependentes), antes e logo ap?s o experimento. As vari?veis independentes, idade e sexo, foram aferidas no sentido de verificar seus efeitos sobre as vari?veis dependentes avaliadas. Ao comparar os par?metros cardiovasculares iniciais com os obtidos ap?s a interven??o nos indiv?duos submetidos ao TF proposto(atrav?s dos testes t de Student para amostras emparelhadas para os par?metros que tiveram distribui??o normal e para os que n?o a possu?ram, o Wilcoxon), n?o houve diferen?a significativa nem na VOP (p =0.469) nem na PCR (p=0,247), por?m houve aumento no Limiar Anaer?bio (LA) (p=0,004) e no consumo m?ximo de oxig?nio (VO2m?x) (p=0,052). Em rela??o ?s medidas antropom?tricas, os indiv?duos diminu?ram significativamente o percentual de gordura (p<0,001) e a massa de gordura (p<0,001), aumentaram a massa livre de gordura (p<0,001), por?m n?o alteraram a rela??o cintura-quadril (RCQ) (p= 0,777), massa corporal (p=0,226) nem o ?ndice de massa corporal (IMC) (p =0,212). Os achados do presente estudo nos levam a crer que o TF proposto, al?m de n?o aumentar a VOP nem a PCR, melhora a capacidade cardiorrespirat?ria e a composi??o corporal. Portanto, os adeptos de tal treinamento podem usufruir, com seguran?a, de todos os seus benef?cios sem risco ao sistema cardiovascular
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Filgueira, Jannayna Domingues Barros. « C?lculo de par?metros otimizados para superf?cies seletivas de frequ?ncia por meio do m?todo de otimiza??o Taguchi ». PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA EL?TRICA E DE COMPUTA??O, 2016. https://repositorio.ufrn.br/jspui/handle/123456789/22046.
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As superf?cies seletivas em frequ?ncia (FSS) pertencem a uma subclasse dos metamateriais composto por patchs met?licos bidimensionais. Por apresentar um comportamento seletivo de frequ?ncia, essas estruturas t?m sido aplicadas nas ?reas de micro-ondas e sistemas de comunica??o, al?m de ser tema de pesquisa por parte de estudiosos. A literatura define basicamente uma superf?cie seletiva de frequ?ncia como um arranjo peri?dico de patches que exibe um determinado comportamento de filtragem de frequ?ncia podendo apresentar caracter?sticas de filtro rejeita-faixa ou passa-faixa que permite a reflex?o ou a transmiss?o de sinais em uma determinada faixa de frequ?ncia. As FSS s?o utilizadas em diversas aplica??es que v?o desde sistemas de micro-ondas e antenas at? aplica??es em radomes e comunica??es via sat?lite. Estruturas de FSS com comportamento Eletromagn?tico adequado t?m sido estudadas por pesquisadores da ?rea. Por?m, a an?lise das caracter?sticas espectrais dessas estruturas requer t?cnica com elevada complexidade computacional. Para reduzir o esfor?o computacional relacionado ao tempo de processamento, podem ser utilizadas t?cnicas de otimiza??o. Neste aspecto, esta pesquisa prop?e a utiliza??o de um m?todo de otimiza??o no projeto de FSS. Os m?todos de otimiza??o t?m como objetivo obter os resultados de um sistema por meio do ajuste dos par?metros de entrada, ou seja, ao ajustar estes par?metros os m?todos de otimiza??o procuram um melhor resultado de sa?da de modo que o desempenho do sistema, em termos de qualidade, custo e efici?ncia, possam ser otimizados. Esses m?todos podem ser aplicados em diversas ?reas. Atualmente, na ?rea do Eletromagnetismo, os circuitos de micro-ondas e antenas t?m aplicado diversas t?cnicas de otimiza??o como Algoritmos Gen?ticos (AG), Redes Neurais Artificiais (RNA) e Otimiza??o com Enxame de Part?culas (PSO). O m?todo de otimiza??o descrito nesta pesquisa foi desenvolvido com base no conceito do arranjo ortogonal, o M?todo Taguchi. Este m?todo fornece uma maneira eficiente para escolher os par?metros do projeto em um processo de Resumo otimiza??o e reduz efetivamente o n?mero de experimentos requerido na aplica??o. O M?todo Taguchi ? aplicado com sucesso nas ?reas de Engenharia Qu?mica e Engenharia Mec?nica e mais recentemente t?m-se aplica??es na ?rea de Eletromagnetismo, por?m, sua aplica??o em FSS ? in?dita. Neste estudo aplicamos o M?todo Taguchi em tr?s estruturas de FSS: FSS quadrada, FSS quadrada com grade e dipolo cruzado. O objetivo do m?todo ? obter os melhores valores para par?metros f?sicos da FSS, de modo que esta opere de forma satisfat?ria, de acordo com especifica??es determinadas no projeto. Utilizamos tamb?m nesta pesquisa o M?todo do Circuito Equivalente. A precis?o do m?todo Taguchi ? verificada experimentalmente e comparada com as simula??es realizadas no ANSYS Designer. Em seguida os prot?tipos s?o constru?dos e caracterizados experimentalmente.
Frequency Selective Surfaces (FSS) belong to a subclass of metamaterial consisting of two-dimensional metallic patches. By presenting a selective frequency behavior, these structures have been applied in the microwave and communication systems fields, in addition it is a research topic by scholars. The literature defines basically the Frequency Selective Surface as a periodic arrangement of patches that displays a certain frequency filtering and it may present characteristics of a band-stop or band-pass filter, which allows the reflection or the transmission of signals in a given frequency range. The FSS are used in diverse applications ranging from microwave and antennas systems to applications in radomes and satellite communications. Researchers have studied FSS structures with appropriate electromagnetic behavior. However, the analysis of spectral characteristics of these structures requires technique with high computational complexity. In order to reduce the computational effort related to the time of processing, it may be used optimization techniques. Concerning to it, this study proposes the use of an optimization method in the FSS design. Optimization methods are intended to get the best results of a system by tuning of the input parameters, that is, when these parameters are adjusted, the optimization methods seek a better output result so that the system performance, in terms of quality, cost and efficiency can be improved. These methods can be applied in various areas. Currently, in the Electromagnetism area, the microwave circuits and antennas have applied various optimization techniques like genetic algorithms (GA), Artificial Neural Networks (ANN) and Particle Swarm Optimization (PSO). The optimization method described in this research was developed based on the concept of the Orthogonal Arrangement, Taguchi Method. This method provides an efficient way to choose the project parameters in a process of optimization and it effectively reduces the number of experiments required in the application. Taguchi method is successfully applied in the chemical engineering and mechanical engineering fields and recently, there have been applications in the Abstract Electromagnetism area, however, its application in FSS is unprecedented. In this study, it was applied the Taguchi Method in three structures of FSS: Square FSS, Square with grid FSS and Cross Dipole. The purpose of the method is to obtain the best values for physical parameters of the FSS, so that is operating in a satisfactory manner, in accordance with certain specifications in the project. It was also used in this research the Equivalent Circuit Method. The accuracy of Taguchi Method is verified experimentally and it is compared to the simulations performed in the ANSYS Designer ?. Then, the prototypes are built and measured in order to validate the experimental results.
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Lima, Naiana Gondim Pereira Barros. « Trissoralen um medicamento de baixa dosagem : estudos termoanal?ticos da compatibilidade do f?rmaco-excipientes e determina??o de par?metros de qualidade para c?psulas magistrais ». Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br/handle/123456789/19353.
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O trissoralen (Tri) ? um f?rmaco de baixa dosagem utilizado no tratamento da psor?ase e outras dermatoses. O objetivo do trabalho foi aplica??o da an?lise t?rmica e t?cnicas complementares para caracteriza??o, avalia??o da estabilidade do trissoralen e dos componentes das formula??es farmac?uticas manipuladas. O comportamento t?rmico do Tri por TG/DTG-DTA em atmosfera din?mica de ar sint?tico e nitrog?nio evidenciou o mesmo perfil com um pico de fus?o seguido de um evento relacionado ? volatiliza??o. A partir das curvas TG/DTG observou uma ?nica etapa de perda de massa. Ao aquecer o f?rmaco na estufa nas temperaturas de 80, 240 e 260 ?C observou-se que o mesmo n?o apr esentou altera??es na sua estrutura qu?mica atrav?s das t?cnicas de DRX, CLAE, MIR, MO e MEV. A partir dos estudos cin?ticos n?o-isot?rmicos e isot?rmicos por TG foi poss?vel calcular a energia de ativa??o e ordem de rea??o para o Tri. O f?rmaco apresentou uma boa estabilidade t?rmica. Estudos de compatibilidade f?rmaco-excipiente mostraram que h? intera??o do trissoralen com lauril sulfato s?dio na propor??o 1:1. N?o se observou intera??o com aerosil, amido pr?-gelatinizado, amido glicolato s?dico, celulose, croscarmelose, estearato de magn?sio, lactose e manitol. A caracteriza??o de tr?s formula??es de trissoralen nas concentra??es de 2,5; 5; 7,5; 10; 12,5 e 15 mg foi realizada por DSC, TG/DTG, DRX, MIR e NIR. Um m?todo de classifica??o PCA baseado nos dados dos espectros MIR e NIR das formula??es de trissoralen permitiu uma diferencia??o bem sucedida em tr?s grupos. A formula??o 3 foi a que melhor apresentou o perfil anal?tico com a seguinte composi??o de excipientes aerosil, amido pr?-gelatinizado e celulose. A energia de ativa??o do processo de volatiza??o do f?rmaco foi determinada nas misturas bin?rias e formula??o 3 por meio dos m?todos isoconversional e fitting. A mistura bin?ria com amido glicolato s?dico e lactose apresentaram diferen?a nos par?metros cin?ticos em compara??o ao f?rmaco isolado. As t?cnicas termoanal?ticas (DSC e TG/DTG) mostraram ser metodologias promissoras para quantifica??o do trissoralen pela linearidade obtida, seletividade, n?o uso de solventes, sem preparo de amostra, rapidez e praticidade.
The trioxsalen (Tri) is a low-dose drug used in the treatment of psoriasis and other skin diseases. The aim of the study was applying the thermal analysis and complementary techniques for characterization, evaluation of the trioxsalen stability and components of manipulated pharmaceutical formulations. The thermal behavior of the Tri by TG/DTG-DTA in dynamic atmosphere of synthetic air and nitrogen showed the same profile with a melting peak followed by a volatilization-related event. From the curves TG / DTG is observed a single stage of mass loss. By heating the drug in the stove at temperatures of 80, 240 and 260 ?C, it had no change in chemical structure through the techniques of XRD, HPLC, MIR, OM and SEM. From the non-isothermal and isothermal TG kinetic studies was possible to calculate the activation energy and reaction order for the Tri. The drug showed good thermal stability. Studies on drug-excipient compatibility showed interaction of trissoralen with sodium lauryl sulfate 1:1. There was no interaction with aerosol, pregelatinized starch, sodium starch glycolate, cellulose, croscarmellose sodium, magnesium stearate, lactose and mannitol.The characterization of three trioxsalen formulations at concentrations of 2.5, 5, 7.5, 10, 12.5 and 15 mg was performed by DSC, TG / DTG, XRD, NIR and MIR. The PCA classification method based on spectral data from the NIR and MIR of trissoralen formulations allows successful differentiation into three groups. The formulation 3 was the one that best showed analytical profile with the following composition of aerosil excipients, pre-gelatinized starch and cellulose. The activation energy of the volatilization process of the drug was determined in binary mixtures and formulation 3 through fitting and isoconversional methods. The binary mixture with sodium starch glycolate and lactose showed differences in kinetic parameters compared to the drug isolated. The thermoanalytical techniques (DSC and TG / DTG) were shown to be promising methodologies for quantifying trioxsalen obtained by the linearity, selectivity, no use solvents, without sample preparation, speed and practicality.
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Sebben, Alessandra Deise. « Desenvolvimento e aplica??o de copol?mero absorv?vel como c?mara de regenera??o de nervo perif?rico em ratos ». Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2014. http://tede2.pucrs.br/tede2/handle/tede/6444.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
Introduction: Peripheral nerve injury results in functional loss in the innervated organ, and recovery without surgical intervention is rare. Many surgical techniques can be used for nerve repair. Among these, the tubulization technique can be highlighted: this allows regenerative factors to be introduced into the chamber. Biomaterials and neurotrophic factors are indicated as a therapeutic alternative for reconstruction of peripheral nerves. Objective: To develop a nanotextured absorbable tube of poly(lactic-co-glycolic acid), and to evaluate its effect with and without tacrolimus on peripheral nerve regeneration in rats. Materials and Methods: Nanotextured absorbable PLGA tubes and films with and without incorporation of tacrolimus are developed, which were characterized in vitro and in vivo biocompatibility, biodegradability and effectiveness as technical tubing were fabricated. The in vivo experiment in which 88 rats were used, occurred in two stages: the copolymers with and without tacrolimus were implanted in 63 animals to evaluate the biocompatibility; a defect of 10mm sciatic nerve was created in the remaining 25 animals were divided into three groups according to treatment: autograft (5), tubulization with PLGA (10), tubulization with PLGA and tacrolimus (10). Walking Track and histomorphometric analyses were performed. Results: Nanotextured PLGA films, containing tacrolimus or not, differ from the negative control cell viability in vitro assays (p=0.000). The film containing tacrolimus was significantly improved, regardless of the time, when compared to the film without the drug (p=0.026). In vivo biocompatibility evaluation demonstrated a surrounding tissue to PLGA implants with acute inflammation, which was decreasing the long 90 days evaluation. It was evident less collagen deposition in both biomaterials, p ? 0.020 seven days after the implants were inserted. The PLGA tube without tacrolimus had smaller average response to the thickness of the myelin sheath compared to autograft and the tube containing tacrolimus in proximal, medial and distal segments (p<0.05). In functional assessment of the recovery of the sciatic nerve in rats, the group of PLGA without tacrolimus significantly differed from the 90 days autograft group (p= 0.0020). Conclusion: The present study suggests that the combination of tacrolimus and PLGA promoted the regeneration of rat sciatic nerves, and this can be a powerful alternative to clinical use in peripheral nerve injuries.
Introdu??o: Les?es em nervos perif?ricos resultam na perda de fun??o do ?rg?o inervado e raramente apresentam recupera??o sem a interven??o cir?rgica. Uma das formas de reparo ? a t?cnica de tubuliza??o, atrav?s da qual ? poss?vel acrescentar fatores com capacidade regenerativa. Nesse contexto, biomateriais e fatores neurotr?ficos s?o indicados como uma alternativa terap?utica para reconstru??o de nervos perif?ricos. Objetivo: Desenvolver tubo nanotexturizado absorv?vel composto por poli (?cido l?ctico-co-?cido glic?lico), e avaliar seu efeito sem e com incorpora??o de tacrolimus sobre a regenera??o de nervo perif?rico em ratos. Materiais e M?todos: Foram confeccionados tubos nanotexturizados absorv?veis de PLGA com e sem incorpora??o de tacrolimus, que foram caracterizados in vitro e in vivo quanto ? biocompatibilidade, biodegrada??o e efic?cia como t?cnica de tubuliza??o. O experimento in vivo, no qual foram utilizados 88 ratos, ocorreu em 2 etapas: os copol?meros sem e com incorpora??o de tacrolimus foram implantados em 63 animais para avaliar a biocompatibilidade; um defeito de 10mm no nervo ci?tico foi criado nos 25 animais restantes, os quais foram divididos em tr?s grupos conforme o tratamento: enxerto aut?logo (5), tubuliza??o com tubo PLGA (10) e tubuliza??o com tubo PLGA e tacrolimus (10). Foram realizados Teste de Marcha e an?lise histomorfom?trica. Resultados: As membranas de PLGA, contendo ou n?o tacrolimus, diferiram do controle negativo nos ensaios de viabilidade celular in vitro (p=0,000); a membrana contendo tacrolimus foi significativamente melhor, independentemente do tempo, quando comparada ? membrana sem o f?rmaco (p=0,026). Na avalia??o da biocompatibilidade in vivo, o tecido circunjacente aos implantes de PLGA apresentaram inflama??o aguda, que foi decrescendo ao longo dos 90 dias de avalia??o. Em 7 dias ap?s os implantes serem inseridos, evidenciou-se menor deposi??o de col?geno nos dois biomateriais quando comparado aos demais per?odos (p ? 0,020). O tubo de PLGA sem tacrolimus teve m?dia menor em rela??o ? espessura da bainha de mielina comparado ao enxerto aut?logo e ao tubo contendo tacrolimus nos segmentos proximal, medial e distal (p < 0,05). Na avalia??o funcional da recupera??o do nervo ci?tico de ratos, o grupo de PLGA sem tacrolimus diferiu significativamente do grupo enxerto aut?logo (em 90 dias | p= 0,0021), com menores ?ndices de fun??o ci?tica. Conclus?o: o presente estudo sugere que a combina??o de PLGA e tacrolimus favoreceu a regenera??o de nervo ci?tico de rato, e esta poder? ser uma potente alternativa para aplica??o cl?nica em les?es de nervos perif?ricos.
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Oliveira, Renan da Costa. « Avalia??o do aqu?fero c?rstico Janda?ra na regi?o de Bara?na, Rio Grande do Norte ». PROGRAMA DE P?S-GRADUA??O EM GEODIN?MICA E GEOF?SICA, 2016. https://repositorio.ufrn.br/jspui/handle/123456789/22584.
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A ?rea de estudo localiza-se na regi?o do munic?pio de Bara?na-RN, extremo oeste do Estado do Rio Grande do Norte. Abrange uma superf?cie de 675 Km?, incluindo o Munic?pio de Bara?na, e parte dos munic?pios de Quixer?-CE e Mossor?-RN. O aqu?fero Janda?ra constitui a unidade hidrogeol?gica objeto deste trabalho. Trata-se de um aqu?fero de rochas carbon?ticas utilizado no suprimento h?drico da popula??o urbana (Bara?na) e rural, principalmente da fruticultura irrigada. O objetivo do trabalho ? avaliar o comportamento hidrogeol?gico do aq??fero c?rstico Janda?ra, verificar suas condi??es de utiliza??o, avaliar o car?ter de fluxo subterr?neo, propor o modelo conceitual, al?m de responder a questionamentos sobre o rebaixamento dos n?veis de ?gua. Para isso, foi realizado o levantamento dos dados existentes para a ?rea, a elabora??o de mapas e interpreta??o de imagens, a elabora??o de perfis de po?os, o levantamento de par?metros hidrodin?micos, a avalia??o do fluxo subterr?neo, a avalia??o de recarga e gera??o do modelo conceitual esquem?tico. Com base em dados existentes, a ?rea foi subdividida em tr?s zoneamentos quanto a carstifica??o e identificados por m?todos geof?sicos e esquematizado no modelo conceitual com o auxilio de mapas de estruturas, perfis de po?os e identifica??o de carstes na regi?o. A ?rea possui forte explota??o das ?guas do aqu?fero Janda?ra com utiliza??o principalmente na fruticultura irrigada como mostrou o estudo de utiliza??o das ?guas na regi?o. Tamb?m foram elaboradas as estimativas de reservas com base na varia??o de n?vel da ?gua em po?os selecionados. Os estudos referentes ao fluxo subterr?neo mostraram uma tend?ncia natural de fluxo na dire??o SW-NE, por?m a forte influ?ncia da explota??o das ?guas provocou uma converg?ncia para o setor central da ?rea. A constru??o do modelo conceitual esquem?tico visou identificar as diferentes estruturas apresentadas pelo aqu?fero na regi?o, mostrando a varia??o no desenvolvimento c?rstico. O c?lculo de recarga mostrou o alto potencial do aqu?fero Janda?ra, com rendimento m?dio de 45%, a an?lise dos registros de chuvas e n?veis est?ticos mostrou que a causa para o rebaixamento das ?guas subterr?neas possui dois fatores importantes: a forte explota??o das ?guas aliada as secas prolongadas.
The study area is located in the region of Bara?na-RN city, extreme West of the State of Rio Grande do Norte. It covers an area of 675 square kilometers, including the Municipality of Bara?na, and part of the municipalities of Quixer?-CE and Mossoro-RN. The Janda?ra aquifer constitutes the hydrogeological unit and it is the object of this work. It is an aquifer of carbonate rocks used in the water supply of urban and rural population, mainly of the irrigated fruit-growing. The objective of this work is to evaluate the hydrogeological behavior of the Janda?ra karst aquifer, to verify its conditions of use, to evaluate the underground flow character, to propose the conceptual model, and to answer questions about the lowering of water levels. For this, was performed the survey of the existing data for the area, the elaboration of maps and interpretation of images, the elaboration of well profiles, the hydrodynamic parameters survey, the underground flow evaluation, the recharge evaluation and generation of the model conceptual schematic. Based on existing data, the area was subdivided into three zoning for karstfication and identified by geophysical methods and schematized in the conceptual model with the aid of structure maps, well profiles and identification of karst in the region. The area has strong exploitation of the water of the Janda?ra aquifer with use mainly in irrigated fruit-growing as shown by the study of water use in the region. Also were prepared the reserves estimates based on the water level variation in selected wells. The related studies to underground flow showed a natural flow tendency in the SW-NE direction, but the strong influence of the water exploitation caused a convergence for the central sector of the area. The construction of the conceptual schematic model aimed to identify the different structures presented by the aquifer in the region, showing the variation in karstic development. The recharge calculation showed the high potential of the Janda?ra aquifer, with an average yield of 45%, the analysis of rainfall records and static levels showed that the cause for groundwater retraction has two important factors: The strong exploitation of the waters combined with the prolonged droughts.
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Giacomelli, ?dio. « Avalia??o in vitro da citotoxidade e genotoxidade celular do cimento de ion?mero de vidro modificado por carbonato de c?lcio ». Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2017. http://tede2.pucrs.br/tede2/handle/tede/7298.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
The aim of this study was to evaluate the biocompatibility of conventional glass ionomer cement (GIC) modified by calcium carbonate by means of cytotoxicity and genotoxicity tests. The calcium carbonate (CC), in proportions of 1%, 5% and 10%, was added to the GIC powder. A polytetrafluoroethylene matrix (10 mm diameter and 3 mm height) was used to make the samples, and four groups were obtained (n = 4): G1 ? only GIC (control); G2 ? GIC with 1% CC; G3 ? GIC with 5% CC; G4 ? GIC with 10% CC. The preparation of the samples was carried out in accordance with ISO 10993-12. The MTT test was used to evaluate the cell cytotoxicity, and the micronucleus and comet tests were performed to evaluate the genotoxicity, by using a mouse fibroblast cell culture of the NIH/3T3 lineage. According to MTT test, the samples with 1% and 5% CC showed a higher cytotoxic potential, and the samples with 10% CC presented a cellular viability index comparable to the GIC. The micronucleus test showed that GIC with 10% CC produced an improvement in cell proliferative potential (IPBC).CIV with 5% CC had a reduction in IPBC that did not compromise the material from the genotoxic point of view. In the comet test, groups with the addition of CC had a small increase in genotoxic potential compared with GIC. It was concluded that the addition of 10% CC to the GIC had a low cytotoxic potential and it is feasible for use in the cellular environment, and the addition of 1%, 5% and 10% CC to the GIC did not induce genetic damage.
Este estudo teve o objetivo de avaliar a biocompatibilidade do cimento de ion?mero de vidro (CIV) convencional modificado por carbonato de c?lcio de conchas marinhas por meio dos testes de citotoxicidade e genotoxicidade celular. O carbonato de c?lcio (CC), nas propor??es de 1%, 5% e 10%, foi adicionado ao p? do CIV. Utilizando uma matriz de politetrafluoretileno (10 mm de di?metro e 3 mm de altura), foram confeccionadas as amostras, sendo obtidos quatro grupos (n=4): G1 ? apenas CIV (controle); G2 ? CIV com 1% de CC; G3 ? CIV com 5% de CC; G4 ? CIV com 10% de CC. A prepara??o das amostras foi realizada de acordo com a norma ISO 10993-12. O ensaio MTT foi utilizado para avaliar a citotoxicidade celular, e os ensaios de micron?cleo e cometa foram realizados para avaliar a genotoxicidade, por meio da utiliza??o de uma cultura celular de fibroblastos de camundongo da linhagem NIH/3T3. De acordo com o ensaio MTT, as amostras contendo a adi??o de 1% e 5% de CC apresentaram um maior potencial citot?xico, e as amostras com 10% de CC apresentaram um ?ndice de viabilidade celular compar?vel ao do CIV. O ensaio do micron?cleo evidenciou que o CIV com 10% de CC produziu uma melhora no potencial proliferativo celular (IPBC). CIV com 5% de CC apresentou uma redu??o no IPBC que n?o compromete o material do ponto de vista genot?xico. No ensaio cometa, os grupos com adi??o de CC mostraram um pequeno aumento do potencial genot?xico em compara??o ao CIV. Concluiu-se que a adi??o de 10% de CC ao CIV apresentou um baixo potencial citot?xico, sendo vi?vel para utiliza??o em ambiente celular, e a adi??o de 1%, 5% e 10% de CC ao CIV n?o induziu a um dano gen?tico.
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PEREIRA, Juliana de Abreu. « Efeito da lactulose sobre os par?metros cl?nicos e bioqu?micos s?ricos de c?es azot?micos e n?o azot?micos ». Universidade Federal Rural do Rio de Janeiro, 2012. https://tede.ufrrj.br/jspui/handle/jspui/1727.
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The Chronic Renal Failure (CRF) is characterized by a growing inability of the kidneys to maintain internal homeostasis. The affected animals show major changes as the increase in serum urea, creatinine and phosphorus. Currently, there is no specific treatment for nephropathic. Lactulose, a disaccharide formed by the reaction between fructose and galactose sacarol?ticas is assimilated by bacteria of the intestinal tract and these diminished competition by the population of urease-producing bacteria, limiting the production and absorption of ammonia and urea with consequent reduction in portal blood. Aiming to evaluate the effects of lactulose as adjuvant treatment of dogs with CRF were evaluated parameters indicative of liver function (enzymes alanine aminotransferase (ALT), aspartate aminotransferase (AST) and alkaline phosphatase (ALP) and renal (urea and creatinine) besides glucose and serum levels of Ca and P in dogs azot?micos not under normal handling and feeding, or not treated with lactulose orally for a period of 30 days, and serum urea and creatinine in dogs with CRF under different protocols therapeutic. feces showed normal color and odor, but diarrhea in animals treated with lactulose. animals as normal renal function, or not treated with lactulose showed no significant changes in blood glucose, serum activities of the enzymes ALT, AST and ALP, and values of urea and creatinine. animals treated with lactulose the phosphorus decreased progressively with a significant difference on days 21 and 30. biochemical analyzes for urea and creatinine nephropathic animals under different treatment protocols showed a reduction of these metabolites in animals of all groups , emphasizing the reduction of uremia and the effect of cetoan?logos and use of prebiotic lactulose in nephropathic dogs.
A Insufici?ncia Renal Cr?nica (IRC) ? caracterizada por uma crescente incapacidade dos rins em manter a homeostasia interna. Os animais acometidos apresentam como principais altera??es o aumento dos n?veis s?ricos de ur?ia, creatinina e f?sforo. Atualmente, n?o existe um tratamento espec?fico para nefropatas. A lactulose, um dissacar?deo formado pela rea??o entre frutose e galactose ? assimilado por bact?rias sacarol?ticas do trato intestinal e estas diminuem por competi??o a popula??o de bact?rias produtoras de urease, limitando a produ??o e absor??o de ur?ia e am?nia com consequente redu??o no sangue portal. Com os objetivos de avaliar os efeitos da lactulose como coadjuvante do tratamento de c?es com IRC foram avaliados os par?metros indicativos da fun??o hep?tica (enzimas alaninoaminotransferase (ALT), aspartatoaminotransferase (AST) e fosfatase alcalina (FA) e renal (ur?ia e creatinina), al?m da glicemia e n?veis s?ricos de Ca e P em c?es n?o azot?micos sob manejo e alimenta??o normais, tratados ou n?o com lactulose por via oral, por um per?odo de 30 dias e os n?veis s?ricos de ur?ia e creatinina de c?es com IRC sob diferentes protocolos terap?uticos. As fezes apresentaram cor e odor normais, por?m diarr?icas nos animais tratados com lactulose. Os animais normais quanto ? fun??o renal, tratados ou n?o com lactulose n?o apresentaram altera??es significativas na glicemia, atividades s?ricas das enzimas ALT, AST e FA; e nos valores de ur?ia e creatinina. Para os animais tratados com lactulose a fosfatemia sofreu redu??o progressiva com diferen?a significativa nos dias 21 e 30. An?lises bioqu?micas para ur?ia e creatinina dos animais nefropatas sob diferentes protocolos de tratamento indicou redu??o desses metab?litos em animais de todos os grupos, destacando-se a redu??o da uremia e o efeito ben?fico dos cetoan?logos e do uso do pr?-bi?tico lactulose em c?es nefropatas.
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Giacomelli, ?dio. « Avalia??o in vitro da citotoxicidade celular do cimento de ion?mero de vidro modificado por carbonato de c?lcio de conchas marinhas ». Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2012. http://tede2.pucrs.br/tede2/handle/tede/1158.
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Previous issue date: 2012-03-12This study aimed to evaluate the cytotoxicity and bioactivity of the glass ionomer cement modified with calcium carbonate shells. For testing cell toxicity was using Saccharomyces cerevisiae as a model organism. The induction of cytotoxicity was evaluated by two different tests using wild-type strain FF18733 of S. cerevisiae: (1) yeast cell survival and (2) formation of petite colonies (respiratory mutants). For tests of bioactivity was evaluated weight change of samples and analysis of hydroxyapatite deposition by SEM and EDS after immersion in simulated blood plasma. The results of survival tests showed that different concentrations of calcium carbonate added to the GIC (1%, 5% and 10% by weight) induced a slight loss of cell viability in S. cerevisiae in relation to the negative control, but it was not enough to be considered as a significant induction of toxicity. In relation to the petite colonies, there was no induction of mutants respiratory formation in any of the concentrations tested, indicating that the GIC did not induce altered oxidative stress in cells of S. cerevisiae. In the evaluation of bioactivity, the results showed that after immersion all groups tested showed a decrease in weight of the samples, which can be attributed to the dissolution of glass ionomer cement. In the fourth week of immersion there was a significant variation in the average percentage of weight for all groups. The SEM analysis showed a slight deposition of hydroxyapatite on the surface of the groups with the addition of powdered shells compared to the control group.
Este estudo teve como objetivo avaliar a citotoxicidade e bioatividade do cimento de ion?mero de vidro modificado com carbonato de c?lcio de conchas. Para os testes de toxicidade celular foi utilizando a Saccharomyces cerevisiae como organismo modelo. A indu??o de citotoxicidade foi avaliada por dois testes diferentes usando a S. Cerevisiae cepa selvagem wild-type FF18733: (1) a sobreviv?ncia da c?lula de levedura e (2) forma??o de col?nias petite (mutantes respirat?rios). Para os testes de bioatividade foi avaliada a varia??o de peso das amostras e an?lise de deposi??o de hidroxiapatita pela MEV e EDS ap?s imers?o em solu??o simuladora de plasma sang??neo. Os resultados dos testes de sobreviv?ncia mostraram que as diferentes concentra??es de carbonato de c?lcio adicionado ao CIV (1%, 5% e 10% em peso) induziram uma ligeira perda de viabilidade celular em S. cerevisiae em rela??o ao controle negativo, por?m n?o foi o suficiente para ser considerado como uma indu??o de toxicidade significativa. Em rela??o ?s col?nias petite, n?o foi observada a indu??o de forma??o de mutantes respirat?rios em qualquer uma das concentra??es testadas, indicando que o CIV modificado n?o induziu estresse oxidativo em c?lulas de S. cerevisiae. Na avalia??o da bioatividade, os resultados mostraram que ap?s a imers?o todos os grupos testados apresentaram uma diminui??o no peso das amostras, que pode ser atribu?do ? dissolu??o do cimento de ion?mero de vidro. Na quarta semana de imers?o houve uma varia??o significativa na percentual m?dio de peso para todos os grupos. A an?lise de MEV mostrou uma ligeira deposi??o de hidroxiapatita sobre a superf?cie dos grupos com a adi??o de p? de conchas em compara??o ao grupo controle.
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Bampi, Vin?cius Faccin. « Efeitos do maleato de sunitinibe e da quimioterapia metron?mica na microangioarquitetura do carcinoma oral de c?lulas escamosas em bolsa jugal de hamster s?rio ». Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2014. http://tede2.pucrs.br/tede2/handle/tede/1779.
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Previous issue date: 2014-01-14Oral cancer is among the six most common types of cancer worldwide, considered as the seventh most frequent in the Brazil. Tumor angiogenesis has become a promising target for the treatment of malignancies. Methods that allow three-dimensional evaluation of the vascular network of tumors have a great importance to assess the effects of antiangiogenic treatments in tumors. The objective of this study was to evaluate the effect of sunitinib maleate and the metronomic chemotherapy with cyclophosphamide on the vascular network of the oral squamous cell carcinoma by scanning electron microscopy (SEM) of corrosion casts. 24 Syrian hamsters (Mesocricetus auratus) were divided into three groups of eight animals each and had their right buccal pouches submitted to tumor induction with dimethylbenzanthracene and carbamide peroxide for 55 days. Following, the animals were maintained without treatment (group I) or receiving sunitinib (group II), or cyclophosphamide (group III) for a period of 4 weeks. After the treatment, six animals of each group had their vascular networks casted by Mercox? resin and analyzed qualitatively and quantitatively by SEM. The two remaining animals of each group had their buccal pouches prepared for qualitative analysis by light microscopy. It was observed changes in the angioarchitecture of the pouches that were treated with these two drugs, suggesting an improvement in the tumors vascularization. The main changes caused by the treatments were the reduction of vessel tortuosity, the reestablishment of vascular hierarchy, besides the decrease of sprouting and intussusception images, compressed vessels, saccular dilations, and other vascular figures. Quantitative analysis of the samples exhibited a statistically significant reduction in vascular diameter and intervascular distances ofthe pouches treated with cyclophosphamide, when compared with the pouches no treated and those treated with sunitinb. The findings of the present study suggest that these two drugs may act in the vascular normalization of squamous cell carcinomas induced in hamster buccal pouch, however the metronomic chemotherapy exhibited superior results.
O c?ncer oral est? entre os seis tipos mais comuns de c?ncer no mundo, sendo o s?timo mais encontrado entre a popula??o brasileira. O processo de angiog?nese tumoral tem-se tornado um alvo promissor para o tratamento de neoplasias malignas. Os m?todos que permitem a avalia??o tridimensional da angioarquitetura dos tumores s?o de grande import?ncia na an?lise dos efeitos de tratamentos antiangiog?nico. Este trabalho visou avaliar o efeito do maleato de sunitinibe e da quimioterapia metron?mica com ciclofosfamida na vasculatura do carcinoma oral de c?lulas escamosas, atrav?s de microscopia eletr?nica de varredura (MEV) de r?plicas vasculares. Assim, 24 hamsters s?rios (Mesocricetus auratus) divididos em tr?s grupos de oito animais cada, tiveram suas bolsas jugais direitas submetidas ? indu??o tumoral com dimetilbenzantraceno e per?xido de carbamida por 55 dias, sendo mantidos por mais 4 semanas sem tratamento (grupo I), ou recebendo sunitinibe (grupo II), ou ciclofosfamida (grupo III). Ap?s o tratamento, seis animais de cada grupo tiveram suas redes vasculares moldadas pela resina Mercox? e analisadas qualitativa e quantitativamente em MEV. Os dois animais restantes de cada grupo tiveram suas bolsas qualitativamente analisadas em microscopia de luz. Foram observadas modifica??es na angioarquitetura das bolsas que receberam tratamento com os dois f?rmacos, o que gerou uma normaliza??o da vasculariza??o dos tumores. As principais modifica??es provocadas pelos tratamentos foram a redu??o da tortuosidade dos vasos, o reestabelecimento da hierarquia vascular, al?m da diminui??o de imagens de sprouting e intussuscep??es, vasos comprimidos, dilata??es saculares e outras figuras vasculares. A an?lise quantitativa das amostras evidenciou uma redu??o estatisticamente significativa do di?metro vascular e das dist?ncias intervasculares nas bolsas tratadas com ciclofosfamida, quando comparadas com as bolsas que n?o receberam tratamento e com aquelas tratadas com sunitinibe. Os achados do presente estudo sugerem que essas duas drogas podem atuar na normaliza??o da rede vascular no carcinoma de c?lulas escamosas induzido em bolsa jugal de hamster; no entanto a quimioterapia metron?mica apresentou resultados superiores.
Livres sur le sujet "Metro C"
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General, New York (State) Metropolitan Transportation Authority Office of the Inspector. An investigation into the background of C&S Transit Corporation, its principal owners and its performance in Transit Authority and Metro-North Commuter Railroad contracts. [New York] : Office of the Inspector General, Metropolitan Transportation Authority, 1985.
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Ward, H. Henry. An investigation of the archaeological resources associated with the Northeast extension of the Baltimore Metro-Shot Tower Subway Station : Section C Site (18BC65 & 18BC66) on Baltimore Street, Baltimore, Maryland : final report. Baltimore, Md : The Center, 1989.
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Nelles, Gu nter, et Tobias Bu scher. Madrid : Putevoditel £ ; stolica ispanii ot A do Ja ; istorija i kul £tura ; karty goroda i okrestnostej ; schema metro ; c asy raboty muzeev ; vec ernij Madrid ; ispanskaja kuchnja ; restorany i pokupki ; Prado, E skorial, Segovija, Toledo ; praktic eskie sovety ; razgovornik. Mjunchen : Nelles, 2009.
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Kippenberger. Martin Kippenberger : [exposition], Galerie Max Hetzler, Cologne, 17 novembre-23 décembre 1989 : Galerie carrée, Villa Arson, Nice, 2-25 février 1990 : Galerie Luhring Augustine Hetzler, Santa Monica, 2 mars-7 avril 1990 : Metro Pictures, New York, 10 mars-7 avril 1990. Nice : Villa Arson, 1990.
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My Practice Book the Metro Early Reading Program Level C. Metro, 1999.
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Metro Revealed Building Windows 8 Apps With Xaml And C. Apress, 2012.
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Maps, Thomas Brothers. Metro Washington, D. C./Baltimore Street Guide and Directory : 1999 Edition. Thomas Brothers Maps, 1998.
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Designing Windows 8 Metro Applications with C and Xaml Microsoft Windows Development. Addison-Wesley Professional, 2012.
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Step Towards an AWE$OME Financial Future ! : Washington, D. C. Metro Edition. Independently Published, 2020.
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Davis, David, Richard Crane, Noah Weinert et John Pelak. Sams Teach Yourself Windows 8 Metro Apps with XAML and C# in 24 Hours. Pearson Education, Limited, 2025.
Trouver le texte intégralChapitres de livres sur le sujet "Metro C"
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Yu, Hao, Francesco Musumeci, Jiawei Zhang, Yuming Xiao, Massimo Tornatore et Yuefeng Ji. « DU/CU Placement for C-RAN over Optical Metro-Aggregation Networks ». Dans Optical Network Design and Modeling, 82–93. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38085-4_8.
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« Where to Go, What to Ask : Selecting and Designing the Case Studies ». Dans Equity, Growth, and Community : What the Nation Can Learn from America's Metro Areas, 56–75. University of California Press, 2015. http://dx.doi.org/10.1525/luminos.6.c.
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« D finite element modeling and construction aspects for vertical shafts in Metro C Rome ». Dans Geotechnical Aspects of Underground Construction in Soft Ground, 703–10. CRC Press, 2012. http://dx.doi.org/10.1201/b12748-92.
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Romani, E., M. D’Angelo et R. Sorge. « The archaeological findings are changing Amba-Aradam station design in Rome Metro Line C ». Dans Tunnels and Underground Cities : Engineering and Innovation meet Archaeology, Architecture and Art, 178–87. CRC Press, 2020. http://dx.doi.org/10.4324/9781003029670-19.
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Romani, E., M. D’Angelo et R. Sorge. « The archaeological findings are changing Amba-Aradam station design in Rome Metro Line C ». Dans Tunnels and Underground Cities : Engineering and Innovation meet Archaeology, Architecture and Art, 178–87. CRC Press, 2019. http://dx.doi.org/10.1201/9780429424441-19.
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Romani, E., M. D’Angelo et R. Sorge. « The archaeological findings are changing Amba-Aradam station design in Rome Metro Line C ». Dans Tunnels and Underground Cities : Engineering and Innovation meet Archaeology, Architecture and Art, 178–87. CRC Press, 2020. http://dx.doi.org/10.1201/9781003029670-19.
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« Contributors ». Dans #MeToo and Literary Studies. Bloomsbury Academic, 2021. http://dx.doi.org/10.5040/9781501372773.ch-c.
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Furlani, G., G. Guiducci, A. Lucarelli, A. Carrettucci et R. Sorge. « 3-D finite element modeling and construction aspects for vertical shafts in Metro C Rome ». Dans Geotechnical Aspects of Underground Construction in Soft Ground, 685–92. CRC Press, 2012. http://dx.doi.org/10.1201/b12748-90.
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Pirone, M., F. Carriero, R. Sorge, D. Sebastiani, S. Miliziano et V. Foti. « The management of the soil conditioning process for the excavation of the Rome Metro C line ». Dans Tunnels and Underground Cities : Engineering and Innovation meet Archaeology, Architecture and Art, 2870–80. CRC Press, 2020. http://dx.doi.org/10.4324/9781003031635-34.
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Pirone, M., F. Carriero, R. Sorge, D. Sebastiani, S. Miliziano et V. Foti. « The management of the soil conditioning process for the excavation of the Rome Metro C line ». Dans Tunnels and Underground Cities : Engineering and Innovation meet Archaeology, Architecture and Art, 2870–80. CRC Press, 2019. http://dx.doi.org/10.1201/9780429424441-304.
Texte intégralActes de conférences sur le sujet "Metro C"
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Paolucci, F., R. Emmerich, F. Fresi, I. Sackey, L. Poti, C. Schubert, J. K. Fischer et F. Cugini. « Filterless Optical WDM Metro Networks Exploiting C+L Band ». Dans 2018 European Conference on Optical Communication (ECOC). IEEE, 2018. http://dx.doi.org/10.1109/ecoc.2018.8535529.
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Qu, Zhen, Yang Yue, Guodong Xie, Xinlai Liu, Jian Yao, Weiyang Mo, Daniel Pudvay, Jason O'Neil, Winston Chang et Jon Anderson. « Single-lambda 100G-PAM4 QSFP28 transceiver for 80-km C-band transmission ». Dans Metro and Data Center Optical Networks and Short-Reach Links III, sous la direction de Madeleine Glick, Atul K. Srivastava et Youichi Akasaka. SPIE, 2020. http://dx.doi.org/10.1117/12.2542704.
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Sarmiento, Samael, Salvatore Spadaro et Jose A. Lazaro. « Cost-effective ROADM architecture for C/DWDM Metro-Access Networks convergence ». Dans 2017 19th International Conference on Transparent Optical Networks (ICTON). IEEE, 2017. http://dx.doi.org/10.1109/icton.2017.8024960.
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Gomes, Filipa, Luís Cancela et João Rebola. « Impact of Physical Layer Impairments on C+L-band Metro Networks ». Dans 10th International Conference on Photonics, Optics and Laser Technology. SCITEPRESS - Science and Technology Publications, 2022. http://dx.doi.org/10.5220/0010909900003121.
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Zhang, Lingzhu, et Alain CHIARADIA. « How to design the metro network for maximal accessibility potential ? A comparative analysis of Shanghai. » Dans 24th ISUF 2017 - City and Territory in the Globalization Age. Valencia : Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.4975.
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In Shanghai, the high-capacity metro network has been proved to play an important role in the urban movement and urban morphology generating pattern. Previous studies on the metro network analysis such as London Underground network (Chiaradia, 2005) and Shanghai Metro network (Zhang, 2014) have shown that topological configuration of metro network can explain at least 50% of entry/exit movement at metro stations. The Shanghai metro network uses a core ring (Inner ring Line 4) to encircle a core of stations which are characterized by higher line connectivity. Branches radiate from the core and reach further areas of the urban system. However, the core lines and stations have over-congested especially at peak time, at the same time, the link mean distance doesn’t minimized because the inner ring core is not big enough for the ever growing metro network. How should the network be designed to achieve best accessibility potential? Through the use of sDNA (spatial design network analysis) and geographic information system, this paper compared current 2016 and planned 2020 Shanghai metro network (Fig 1). There was an increase of 23% in the metro station amount, however, the mean distance only decreased by 2.6%, and the line connectivity increased by 0.68%. Inspired by the Shanghai City Planning 2015-2040 which will reserve place for a ring-shaped metro line near mid-ring, and by the two orbital rail rings for the Greater Paris, we did a comparison between 4 network plans based on the 2016 network: a) a mid-ring line added; b)a mid-ring line & mid-ring express line added; c) two ellipse rings added; d) two ellipse rings & ellipse express lines added (Fig 2). The results showed that the plan D works best for minimizing mean distance and maximizing line connectivity, followed by plan C, plan B, and plan A. Two ellipse rings and express lines led to a reduction of more than 30% of network mean distance and an increase of 18.5% of line connectivity, corresponding to only 13% increase of the metro station amount. The proposed approach enables us to configurationally examine urban metro network accessibility potential and provides decision support for urban development.
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Emmerich, Robert, António Eira, Nelson Costa, Pablo Wilke Berenguer, Colja Schubert, Johannes Karl Fischer et João Pedro. « Capacity Limits of C+L Metro Transport Networks Exploiting Dual-Band Node Architectures ». Dans Optical Fiber Communication Conference. Washington, D.C. : OSA, 2020. http://dx.doi.org/10.1364/ofc.2020.m2g.5.
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Askari, Leila, Francesco Musumeci, Lorenzo Salerno, Omran Ayoub et Massimo Tornatore. « Dynamic DU/CU Placement for 3-layer C-RANs in Optical Metro-Access Networks ». Dans 2020 22nd International Conference on Transparent Optical Networks (ICTON). IEEE, 2020. http://dx.doi.org/10.1109/icton51198.2020.9203072.
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Parolari, P., A. Gatto, M. Rapisarda, F. Lipparini, C. Neumeyr, M. Svaluto Moreolo et P. Boffi. « Preliminary Assessment of Photonic Solutions Based on C-Band VCSELs for Multi-Tb/s Metro Networks ». Dans 2020 22nd International Conference on Transparent Optical Networks (ICTON). IEEE, 2020. http://dx.doi.org/10.1109/icton51198.2020.9203396.
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Liu, Lihao, Shan Yin, Chen Yang, Wei Zhang, Zhenhao Wang et Shanguo Huang. « A Reinforcement Learning Based Computing Task Offloading Scheme in Incompletely Expanded C+L-Band Metro Optical Networks ». Dans Optoelectronics and Communications Conference. Washington, D.C. : OSA, 2021. http://dx.doi.org/10.1364/oecc.2021.t2a.5.
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Vittori, Felipe, Luis Rojas-Solo´rzano, Armando J. Blanco et Rafael Urbina. « Numerical Study of Smoke Propagation in a Simulated Fire in a Wagon Within a Subway Tunnel ». Dans ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55281.
Texte intégralRésumé :
This work deals with the numerical (CFD) analysis of the smoke propagation during fires within closed environments. It is evaluated the capacity of the emergency ventilation system in controlling the smoke propagation and minimizing the deadly impact of an eventual fire in a wagon within the Metro de Caracas subway tunnel on the passengers safety. For the study, it was chosen the tunnel section between Teatros and Nuevo Circo subway stations, which consists of two parallel independent twin tunnels, connected through a transverse passage. The tunnels are provided by a longitudinal ventilation system, integrated by a set of reversible fans located at both ends of the tunnels. Three stages were considered in the study: (a) Model set up; (b) Mesh sensitivity analysis; (c) Validation of the physical-numerical parameters to be used in the numerical model; and (d) Simulation of fire scenarios in Metro de Caracas subway stations. Stages (b)–(c), aimed to testing and calibrating the CFD tool (ANSYS-CFX10™), focused on reproducing experimental data from Vauquelin and Me´gret [1], who studied the smoke propagation in a fire within a 1:20 scale road tunnel. Stage (d) critical scenarios were established via a preliminary discussion with safety experts from Metro de Caracas, in order to reduce the computer memory and the number of simulations to be performed. The analyses assessed the reliability of escape routes and alternative paths for the evacuation of passengers. Additionally, the smoke front movement was particularly computed, as a function of time, in order to determine the possible presence of the “backlayering” phenomenon [5]. Results demonstrate the strengths and weaknesses of the current ventilation system in the event of a fire in the subway tunnel, and suggest new strategies to address this potentially lethal event to minimize the risks for passengers.