Search

Your search keyword '"Davila, C."' showing total 298 results
Start Over Author "Davila, C."
298 results on '"Davila, C."'

2. POS0114 LUPUS NEPHRITIS AND RESPONSE TO TREATMENT IN LATIN AMERICA

Author

Quintana, R., primary, Nieto, R., additional, Fernández Ávila, D. C., additional, Serrano, R., additional, Harvey, G., additional, Hernández, L., additional, Roberts, K., additional, Scolnik, M., additional, Funes Soaje, C., additional, Alba, P., additional, Saurit, V., additional, García, M. A., additional, Berbotto, G., additional, Bellomio, V., additional, Patiño Grageda, W., additional, Gómez, G., additional, Pisoni, C., additional, Malvar, A., additional, Juarez, V., additional, Da Silva, N. A., additional, Monticielo, O. A., additional, Mariz, H. A., additional, Machado Ribeiro, F., additional, Borba, E. F., additional, Parente, L., additional, Torres, E., additional, Neira, O., additional, Massardo, L., additional, Aroca Martínez, G., additional, Cañas Davila, C. A., additional, Quintana López, G., additional, Toro-Gutierrez, C. E., additional, Moreno Alvarez, M., additional, Zúñiga, A., additional, Saavedra Salinas, M. A., additional, Portela Hernandez, M., additional, Fragoso Loyo, H., additional, Silveira, L., additional, García De La Torre, I., additional, Abud Mendoza, C., additional, Fonseca Hernández, M., additional, Esquivel-Valerio, J. A., additional, Acosta Colmán, I., additional, Losanto, J., additional, Mora Trujillo, C., additional, Zuñiga Corrales, K., additional, Muñoz Louis, R., additional, Rebella, M., additional, Danza, Á., additional, Ugarte-Gil, M. F., additional, Alarcón, G. S., additional, Sbarigia, U., additional, Zazzetti, F., additional, Orillion, A., additional, Pons-Estel, G., additional, and Pons-Estel, B., additional

Published
2024
Full Text
View/download PDF

7. HCV reinfection after HCV therapy among HIV/HCV-coinfected individuals in Europe

Author

Amele, S., Sandri, A. K., Rodger, A., Vandekerckhove, L., Benfield, T., Milinkovic, A., Duvivier, C., Stellbrink, H. -J., Sambatakou, H., Chkhartishvili, N., Caldeira, L., Laguno, M., Domingo, P., Wandeler, G., Gisinger, M., Kuzovatova, E., Dragovic, G., Knysz, B., Matulionyte, R., Rockstroh, J. K., Lundgren, J. D., Mocroft, A., Peters, L., Harxhi, A., Losso, M., Kundro, M., Schmied, B., Zangerle, R., Karpov, I., Vassilenko, A., Mitsura, V. M., Paduto, D., Clumeck, N., Wit, S. D., Delforge, M., Florence, E., Hadziosmanovic, V., Begovac, J., Machala, L., Jilich, D., Sedlacek, D., Kronborg, G., Gerstoft, J., Katzenstein, T., Pedersen, C., Johansen, I. S., Ostergaard, L., Wiese, L., Moller, N. F., Nielsen, L. N., Zilmer, K., Smidt, J., Aho, I., Viard, J. -P., Girard, P. -M., Pradier, C., Fontas, E., Rockstroh, J., Behrens, G., Degen, O., Stellbrink, H. J., Stefan, C., Bogner, J., Fatkenheuer, G., Adamis, G., Paissios, N., Szlavik, J., Gottfredsson, M., Devitt, E., Tau, L., Turner, D., Burke, M., Shahar, E., Hassoun, G., Elinav, H., Haouzi, M., Elbirt, D., D'Arminio Monforte, A., Esposito, R., Mazeu, I., Mussini, C., Mazzotta, F., Gabbuti, A., Lazzarin, A., Castagna, A., Gianotti, N., Galli, M., Ridolfo, A., Sacco, L., Uzdaviniene, V., Staub, T., Hemmer, R., Dragas, S., Stevanovic, M., Reiss, P., Trajanovska, J., Reikvam, D. H., Maeland, A., Bruun, J., Gasiorowski, J., Inglot, M., Bakowska, E., Flisiak, R., Grzeszczuk, A., Parczewski, M., Maciejewska, K., Aksak-Was, B., Beniowski, M., Mularska, E., Jablonowska, E., Kamerys, J., Wojcik, K., Mozer-Lisewska, I., Rozplochowski, B., Zagalo, A., Mansinho, K., Maltez, F., Radoi, R., Oprea, C., Davila, C., Yakovlev, A., Trofimora, T., Khromova, I., Blokhina, I. N., Novogrod, N., Borodulina, E., Vdoushkina, E., Ranin, J., Tomazic, J., Miro, J. M., Martinez, E., Garcia, F., Blanco, J. L., Martinez-Rebollar, M., Mallolas, J., Callau, P., Rojas, J., Inciarta, A., Moreno, S., del Campo, S., Clotet, B., Jou, A., Paredes, R., Puig, J., Llibre, J. M., Santos, J. R., Gutierrez, M., Mateo, G., Sambeat, M. A., Laporte, J. M., Falconer, K., Thalme, A., Sonnerborg, A., Brannstrom, J., Flamholc, L., Scherrer, A., Weber, R., Cavassini, M., Calmy, A., Furrer, H., Battegay, M., Schmid, P., Kuznetsova, A., Mikhalik, J., Sluzhynska, M., Johnson, A. M., Simons, E., Edwards, S., Phillips, A., Johnson, M. A., Orkin, C., Winston, A., Clarke, A., Leen, C., Lundgren, J., Rasmussen, L. D., Svedhem, V., Kowalska, J. D., Guaraldi, G., Kirk, O., Bojesen, A., Raben, D., Hansen, E. V., Kristensen, D., Larsen, J. F., Fischer, A. H., Cozzi-Lepri, A., Pelchen-Matthews, A., Roen, A., Tusch, E., Bannister, W., Reekie, J., Amele, S., Sandri, A. K., Rodger, A., Vandekerckhove, L., Benfield, T., Milinkovic, A., Duvivier, C., Stellbrink, H. -J., Sambatakou, H., Chkhartishvili, N., Caldeira, L., Laguno, M., Domingo, P., Wandeler, G., Gisinger, M., Kuzovatova, E., Dragovic, G., Knysz, B., Matulionyte, R., Rockstroh, J. K., Lundgren, J. D., Mocroft, A., Peters, L., Harxhi, A., Losso, M., Kundro, M., Schmied, B., Zangerle, R., Karpov, I., Vassilenko, A., Mitsura, V. M., Paduto, D., Clumeck, N., Wit, S. D., Delforge, M., Florence, E., Hadziosmanovic, V., Begovac, J., Machala, L., Jilich, D., Sedlacek, D., Kronborg, G., Gerstoft, J., Katzenstein, T., Pedersen, C., Johansen, I. S., Ostergaard, L., Wiese, L., Moller, N. F., Nielsen, L. N., Zilmer, K., Smidt, J., Aho, I., Viard, J. -P., Girard, P. -M., Pradier, C., Fontas, E., Rockstroh, J., Behrens, G., Degen, O., Stellbrink, H. J., Stefan, C., Bogner, J., Fatkenheuer, G., Adamis, G., Paissios, N., Szlavik, J., Gottfredsson, M., Devitt, E., Tau, L., Turner, D., Burke, M., Shahar, E., Hassoun, G., Elinav, H., Haouzi, M., Elbirt, D., D'Arminio Monforte, A., Esposito, R., Mazeu, I., Mussini, C., Mazzotta, F., Gabbuti, A., Lazzarin, A., Castagna, A., Gianotti, N., Galli, M., Ridolfo, A., Sacco, L., Uzdaviniene, V., Staub, T., Hemmer, R., Dragas, S., Stevanovic, M., Reiss, P., Trajanovska, J., Reikvam, D. H., Maeland, A., Bruun, J., Gasiorowski, J., Inglot, M., Bakowska, E., Flisiak, R., Grzeszczuk, A., Parczewski, M., Maciejewska, K., Aksak-Was, B., Beniowski, M., Mularska, E., Jablonowska, E., Kamerys, J., Wojcik, K., Mozer-Lisewska, I., Rozplochowski, B., Zagalo, A., Mansinho, K., Maltez, F., Radoi, R., Oprea, C., Davila, C., Yakovlev, A., Trofimora, T., Khromova, I., Blokhina, I. N., Novogrod, N., Borodulina, E., Vdoushkina, E., Ranin, J., Tomazic, J., Miro, J. M., Martinez, E., Garcia, F., Blanco, J. L., Martinez-Rebollar, M., Mallolas, J., Callau, P., Rojas, J., Inciarta, A., Moreno, S., del Campo, S., Clotet, B., Jou, A., Paredes, R., Puig, J., Llibre, J. M., Santos, J. R., Gutierrez, M., Mateo, G., Sambeat, M. A., Laporte, J. M., Falconer, K., Thalme, A., Sonnerborg, A., Brannstrom, J., Flamholc, L., Scherrer, A., Weber, R., Cavassini, M., Calmy, A., Furrer, H., Battegay, M., Schmid, P., Kuznetsova, A., Mikhalik, J., Sluzhynska, M., Johnson, A. M., Simons, E., Edwards, S., Phillips, A., Johnson, M. A., Orkin, C., Winston, A., Clarke, A., Leen, C., Lundgren, J., Rasmussen, L. D., Svedhem, V., Kowalska, J. D., Guaraldi, G., Kirk, O., Bojesen, A., Raben, D., Hansen, E. V., Kristensen, D., Larsen, J. F., Fischer, A. H., Cozzi-Lepri, A., Pelchen-Matthews, A., Roen, A., Tusch, E., Bannister, W., Reekie, J., Global Health, Infectious diseases, AII - Infectious diseases, and APH - Aging & Later Life

Subjects
Male, direct-acting antivirals, HCV, HIV, interferon, reinfection, HIV Infections, Hepacivirus, Antiviral Agents, 03 medical and health sciences, 0302 clinical medicine, Humans, Pharmacology (medical), 030212 general & internal medicine, 0303 health sciences, Coinfection, 030306 microbiology, Health Policy, virus diseases, Hepatitis C, Chronic, Middle Aged, 3. Good health, Europe, Infectious Diseases, Reinfection, Female
Abstract

Objectives: Although direct-acting antivirals (DAAs) can clear HCV in nearly all HIV/HCV-coinfected individuals, high rates of reinfection may hamper efforts to eliminate HCV in this population. We investigated reinfection after sustained virological response (SVR) in HIV/HCV-coinfected individuals in Europe. Methods: Factors associated with odds of reinfection by 2years after SVR in EuroSIDA participants with one or more HCV-RNA test and 2years follow-up were assessed using logistic regression. Results: Overall, 1022 individuals were included. The median age was 50 (interquartile range: 43–54years), and most were male (78%), injection drug users (52%), and received interferon (IFN)-free DAAs (62%). By 24months, 75 [7.3%, 95% confidence interval (CI): 5.7–8.9%] individuals were reinfected. Among individuals treated prior to 2014, 16.1% were reinfected compared with 4.2% and 8.3%, respectively, among those treated during or after 2014 with IFN-free and IFN-based therapy. After adjustment, individuals who had started treatment during or after 2014 with IFN-free or IFN-based therapy had significantly lower odds of reinfection (adjusted odds ratio = 0.21, 95% CI: 0.11–0.38; 0.43, 95% CI: 0.22–0.83) compared with those who had received therapy before 2014. There were no significant differences in odds of reinfection according to age, gender, European region, HIV transmission risk group or liver fibrosis. Conclusions: Among HIV/HCV-coinfected individuals in Europe, 7.3% were reinfected with HCV within 24months of achieving SVR, with evidence suggesting that this is decreasing over time and with use of newer HCV regimens. Harm reduction to reduce reinfection and surveillance to detect early reinfection with an offer of treatment are essential to eliminate HCV.

Published
2021

8. Regulation of Tau protein phosphorylation by glucosamine-induced O-GlcNAcylation as a neuroprotective mechanism in a brain ischemia-reperfusion model.

Author

Cardozo, C. F., Vera, A., Quintana-Peña, V., Arango-Davila, C. A., and Rengifo, J.

Subjects
TAU proteins, MYOCARDIAL reperfusion, CEREBRAL ischemia, PHOSPHORYLATION, GLUCOSAMINE
Abstract

Purpose:Tau hyperphosphorylation is a modification frequently observed after brain ischemia which has been related to the aggregation of this protein, with subsequent cytoskeletal damage, and cellular toxicity. The present study tests the hypothesis of using glucosamine, an agent that increases protein O-GlcNAcylation, to decrease the levels of phosphorylation in Tau during ischemia-reperfusion. Material and methods: Transient focal ischemia was artificially induced in male Wistar rats by occlusion of the middle cerebral artery (MCAO) with an intraluminal monofilament. A single dose of intraperitoneal glucosamine of 200 mg/kg diluted in normal saline (SSN) was administered 60 min before ischemia. Histological brain sections were processed using indirect immunofluorescence with primary antibodies (anti-O-GlcNAc and anti pTau-ser 396). The Image J software was used to calculate the immunofluorescence signal intensity. Results: The phosphorylation of Tau at the serine residue 396 had a significant decrease with the administration of glucosamine during ischemia-reperfusion compared with the administration of placebo. Conclusions: These results show that glucosamine can reduce the phosphorylation levels of Tau in rodents subjected to ischemia and cerebral reperfusion, which implies a neuroprotective role of glucosamine. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

9. An Analysis Methodology to Predict Damage Propagation in Notched Composite Fuselage Structures

Author

Bergan, A, Davila, C, Leone, F, Awerbuch, J, and Tan, T.-M

Subjects
Composite Materials, Aircraft Design, Testing And Performance
Abstract

A new methodology is proposed for predicting damage propagation in notched composite skin-stiffened structures. The proposed approach considers the interaction of damage propagation in the skin with delamination of the stiffener in order to assess the damage containment behavior of the structure. The damage propagating from a notch within a thin fiber-reinforced polymer skin is idealized as a through-the-thickness cohesive crack. The cohesive law for the through-the-thickness crack is characterized using a compact tension test. The approach was applied to a full-scale pultruded rod stitched efficient unitized structure (PRSEUS) concept fuselage panel that was tested recently. The stitched skin/stringer interfaces, a key feature of the PRSEUS concept, were modeled to assess the effectiveness of the stitching at containing damage propagation. Comparison between the predicted and observed damage extension shows acceptable agreement throughout loading. These results indicate that the model can represent accurately the complex interactions between a through-the-thickness crack in the skin and delamination between the skin and stringer. The model is used to demonstrate that the skin-stiffener interface toughness is critical to damage containment capability

Published
2015

10. Conservation of migratory fishes in the Amazon basin

Author

Duponchelle, Fabrice, Isaac, V. J., Doria, C., Van Damme, P. A., Herrera, G. A., Anderson, E. P., Cruz, R. E. A., Hauser, M., Hermann, T. W., Agudelo, E., Bonilla-Castillo, C., Barthem, R., Freitas, C. E. C., Garcia-Davila, C., Garcia-Vasquez, A., Renno, Jean-François, and Castello, L.

Subjects
hydroelectric dams, threats, fisheries management, overexploitation, biodiversity, societal importance
Abstract

1. The Amazon basin hosts the Earth's highest diversity of freshwater fish. Fish species have adapted to the basin's size and seasonal dynamics by displaying a broad range of migratory behaviour, but they are under increasing threats; however, no study to date has assessed threats and conservation of Amazonian migratory fishes. 2. Here, the available knowledge on the diversity of migratory behaviour in Amazonian fishes is synthesized, including the geographical scales at which they occur, their drivers and timing, and life stage at which they are performed. 3. Migratory fishes are integral components of Amazonian society. They contribute about 93% (range 77-99%) of the fisheries landings in the basin, amounting to -US$436 million annually. 4. These valuable fish populations are mainly threatened by growing trends of overexploitation, deforestation, climate change, and hydroelectric dam development. Most Amazonian migratory fish have key ecological roles as apex predators, ecological engineers, or seed-dispersal species. Reducing their population sizes could induce cascading effects with implications for ecosystem stability and associated services. 5. Conserving Amazonian migratory fishes requires a broad portfolio of research, management, and conservation actions, within an ecosystem-based management framework at the basin scale. This would require trans-frontier coordination and recognition of the crucial importance of freshwater ecosystems and their connectivity. 6. Existing areas where fishing is allowed could be coupled with a chain of freshwater protected areas. Management of commercial and subsistence species also needs fisheries activities to be monitored in the Amazonian cities and in the floodplain communities to allow assessments of the status of target species, and the identification of management units or stocks. Ensuring that existing and future fisheries management rules are effective implies the voluntary participation of fishers, which can be achieved by increasing the effectiveness and coverage of adaptive community-based management schemes.

Published
2021

12. Molecular evidence for three genetic species of Dipteryx in the Peruvian Amazon

Author

Garcia-Davila, C., Gomero, D. A., Renno, Jean-François, Soria, R. D., Pizango, G. H., Llampazo, G. F., Castro-Ruiz, D., de Loayza, E. M., Chavez, C. A., Mader, M., Tysklind, N., Paredes-Villanueva, K., Torres, D. D., Degen, B., and Coronado, E. N. H.

Subjects
Dipteryx charapilla, Sequencing, Shihuahuaco, D. micrantha, Microsatellites, Genetic diversity
Abstract

There is a high international demand for timber from the genus Dipteryx, or "shihuahuaco" as it is known in Peru. Developing tools that allow the identification and discrimination of Dipteryx species is therefore important for supporting management of natural populations and to underpin legal trade of its timber. The objective of this study was the molecular characterization of Dipteryx species in the Peruvian Amazonia. Two plastid regions (cpDNA: trnH-psbA and matK) were sequenced and 11 microsatellite markers (nDNA) were genotyped for 32 individuals identified as Dipteryx charapilla, D. micrantha morphotype 1 and D. micrantha morphotype 2. Using the concatenated sequences of the plastid genes, we identified ten haplotypes that were not shared between the species or between the D. micrantha morphotypes. Haplotypic diversity was greater in D. micrantha morphotype 2 and D. charapilla than in D. micrantha morphotype 1, which presented only one haplotype with a wide distribution in Peru. The microsatellites allowed the discrimination of the same three clades and identified diagnostic alleles for each clade. These results allowed us to demonstrate that the two morphotypes of D. micrantha are different at both the plastid and nuclear markers, which supports the existence of three genetically distinct species in Peru. This study provides information for the genetic discrimination of Dipteryx species and emphasises the importance of conserving the genetic variability of this genus in the Peruvian Amazonia.

Published
2020

14. Evaluation of the geotechnical behaviour of a volcanic soil wall with additions of lime and cement against landslides

Author

Davila, C., Vera, R., Pacheco, L., Duran, G., Davila, C., Vera, R., Pacheco, L., and Duran, G.

Abstract

The construction of earth walls can be a significant response to prevent the next landslides from reaching the road and avoid accidents. Therefore, a material of the same slope was used and reinforced with mixtures of lime and cement, with this same reinforced material a mechanically stabilized hypothetical earth wall (MSE) was developed. An analysis of the original slope was developed to check if there was a possible failure through its safety factor. Then, a hypothetical wall was developed with a floor reinforced with mixtures, in order to assess its overall safety factor and its maximum landslides. According to the results, in principle it was determined that the dosage M-3 / C-4-4 improves in a range of 30% to 37% the friction angle. In addition, it was found that a reinforced wall, that is to say with Lime and cement additions, presents a better behaviour. In its effect, its displacements are about 8 mm and have a global factor of 1.23.

Published
2020

15. Docking studies on novel analogs of quinolones against DNA gyrase of Escherichia coli

Author

Davila, C., Llach, L., Salgado-Moran, G., and Rodrigo Ramirez TAgle

Subjects
lcsh:Pharmacy and materia medica, lcsh:Therapeutics. Pharmacology, docking, lcsh:RM1-950, Escherichia coli, lcsh:RS1-441, DNA gyrase, quinolones, Quinolones, Docking, Arguslab
Abstract

Indexación: Scopus. Chemicals and CAS Registry Numbers: amino acid, 65072-01-7; ciprofloxacin, 85721-33-1; DNA topoisomerase (ATP hydrolysing); gatifloxacin, 112811-59-3, 180200-66-2; levofloxacin, 100986-85-4, 138199-71-0; lomefloxacin, 98079-51-7; moxifloxacin, 151096-09-2; nalidixic acid, 389-08-2; oxolinic acid, 14698-29-4; pipemidic acid, 51940-44-4; rufloxacin, 101363-10-4; sitafloxacin, 127254-12-0, 163253-35-8 Context: Bacterial resistance to antibiotics is the inevitable consequence of the use of antimicrobial agents. Thus, quinolones are an important class of antibacterials; these agents generally consist of a 1-subtituted-1,4-dihydro-4-oxopyridine-3-carboxylic acid moiety combined with an aromatic or heteroaromatic ring fused at the 5- and 6-position. Aims: To determine the binding of quinolones to DNA gyrase of Escherichia coli. Methods: An analysis was performed using an in silico approach to determine, by docking calculations and energy descriptors, the conformer of 4‐oxo‐1,4‐dihydroquinoline skeleton that forms the most stable complex with DNA gyrase of E. coli. Results: The complex shows that the pose of the quinolones coincides with the amino acid residues Asp87, Thr88, Arg91 and Met92, which is expected to be critical in the binding of quinolones to DNA gyrase of E. coli. A series of quinolones were computationally designed, and the interactions between the quinolones and the amino acid residues of the DNA gyrase were calculated. Conclusions: Among the designed compounds, compounds 105 and 115 exhibit higher binding energy values and interact with amino acids Asp87, Thr88, Arg91 and Met92. © 2018 Journal of Pharmacy & Pharmacognosy Research. http://jppres.com/jppres/pdf/vol6/jppres18.368_6.5.386.pdf

Published
2018

18. Analytical Modelling of Transverse Matrix Cracking of [plus or minus Theta/90(sub n)](sub s) Composite Laminates Under Multiaxial Loading

Author

Mayugo, J A, Camanho, P. P, Maimi, P, and Davila, C. G

Subjects
Composite Materials
Abstract

An analytical model based on the analysis of a cracked unit cell of a composite laminate subjected to multiaxial loads is proposed to predict the onset and accumulation of transverse matrix cracks in the 90(sub n) plies of uniformly stressed [plus or minus Theta/90(sub n)](sub s) laminates. The model predicts the effect of matrix cracks on the stiffness of the laminate, as well as the ultimate failure of the laminate, and it accounts for the effect of the ply thickness on the ply strength. Several examples describing the predictions of laminate response, from damage onset up to final failure under both uniaxial and multiaxial loads, are presented.

Published
2010
Full Text
View/download PDF

19. Shedding light on the migratory patterns of the Amazonian goliath catfish, Brachyplatystoma platynemum, using otolith Sr-87/Sr-86 analyses

Author

Hauser, M., Doria, C. R. C., Santos, R. V., Garcia-Vasquez, A., Pouilly, Marc, Pecheyran, C., Ponzevera, E., Torrente-Vilara, G., Berail, S., Panfili, Jacques, Darnaude, A., Renno, Jean-François, Garcia-Davila, C., Nunez Rodriguez, Jesus, Ferraton, F., Vargas, G., and Duponchelle, Fabrice

Subjects
fish, hydroelectric dams, river, catchment, migration, conservation evaluation, fishing
Abstract

In the Amazon, migratory catfishes of the genus Brachyplatystoma are apex predators that are important for fisheries and conservation. The life cycle of Brachyplatystoma platynemum Boulenger, 1898 is poorly known, although it has been hypothesized to be very similar to that of Brachyplatystoma rousseauxii Castelnau, 1855, which uses the entire length of the Amazon basin to complete its life cycle (from the Andes to the estuary). This study provides the first data on the migratory patterns of B.platynemum at the individual level using otolith microchemistry. In total, 94 individuals were sampled close to major breeding areas in the Amazon basin (78 fish from the middle and upper Madeira River and 14 fish from the upper Amazon), and their lifetime movements were assessed by measuring variations in Sr-87/Sr-86 along transverse sections of their otoliths (ear stones), using laser ablation multi-collector mass spectrometry (LA-MC-ICP-MS). The migrations of B.platynemum are not as extensive as those of B.rousseauxii, and do not involve natal homing. Furthermore, the estuary is not a nursery area, at least for fish hatched in the Madeira. Nevertheless, B.platynemum migrates several thousand kilometres within the Amazon basin, with transboundary displacements between at least Bolivia, Brazil, and Peru. Current and planned hydroelectric development in the Amazon basin will severely disrupt both migration and access to breeding grounds, ultimately affecting the recruitment and population dynamics of these apex predators. The conservation of B.platynemum is crucial for the stability of the Amazonian aquatic food webs. This requires building effective fish passage on the two existing Madeira dams and considering alternative options to the large-scale hydropower development in the Amazon basin.

Published
2019

21. Prediction of Size Effects in Notched Laminates Using Continuum Damage Mechanics

Author

Camanho, D. P, Maimi, P, and Davila, C. G

Subjects
Composite Materials
Abstract

This paper examines the use of a continuum damage model to predict strength and size effects in notched carbon-epoxy laminates. The effects of size and the development of a fracture process zone before final failure are identified in an experimental program. The continuum damage model is described and the resulting predictions of size effects are compared with alternative approaches: the point stress and the inherent flaw models, the Linear-Elastic Fracture Mechanics approach, and the strength of materials approach. The results indicate that the continuum damage model is the most accurate technique to predict size effects in composites. Furthermore, the continuum damage model does not require any calibration and it is applicable to general geometries and boundary conditions.

Published
2007

22. An Engineering Solution for Solving Mesh Size Effects in the Simulation of Delamination with Cohesive Zone Models

Author

FROM, Turon, A, Davila, C. G, Camanho, P. P, and Costa, J

Subjects
Composite Materials
Abstract

This paper presents a methodology to determine the parameters to be used in the constitutive equations of Cohesive Zone Models employed in the simulation of delamination in composite materials by means of decohesion finite elements. A closed-form expression is developed to define the stiffness of the cohesive layer. A novel procedure that allows the use of coarser meshes of decohesion elements in large-scale computations is also proposed. The procedure ensures that the energy dissipated by the fracture process is computed correctly. It is shown that coarse-meshed models defined using the approach proposed here yield the same results as the models with finer meshes normally used for the simulation of fracture processes.

Published
2007

23. State of the Climate in 2018

Author

Arndt, D. S., Blunden, J., Dunn, R. J. H., Stanitski, D. M., Gobron, N., Willett, K. M., Sanchez-lugo, A., Berrisford, P., Morice, C., Nicolas, Jp, Carrea, L., Woolway, R. I., Merchant, C. J., Dokulil, M. T., De Eyto, E., Degasperi, C. L., Korhonen, J., Marszelewski, W., May, L., Paterson, A. M., Rusak, J. A., Schladow, S. G., Schmid, M., Verburg, P., Watanabe, S., Weyhenmeyer, G. A., King, A. D., Donat, M. G., Christy, J. R., Po-chedley, S., Mears, C. R., Haimberger, L., Covey, C., Randel, W., Noetzli, J., Biskaborn, B. K., Christiansen, H. H., Isaksen, K., Schoeneich, P., Smith, S., Vieira, G., Zhao, L., Streletskiy, D. A., Robinson, D. A., Pelto, M., Berry, D. I., Bosilovich, M. G., Simmons, A. J., Mears, C., Ho, S. P., Bock, O., Zhou, X., Nicolas, J, Vose, R. S., Adler, R., Gu, G., Becker, A., Yin, X, Tye, M. R., Blenkinsop, S., Durre, I., Ziese, M., Collow, A. B. Marquardt, Rustemeier, E., Foster, M. J., Di Girolamo, L., Frey, R. A., Heidinger, A. K., Sun-mack, S., Phillips, C., Menzel, W. P., Stengel, M., Zhao, G., Kim, H., Rodell, M., Li, B., Famiglietti, J. S., Scanlon, T., Van Der Schalie, R., Preimesberger, W., Reimer, C., Hahn, S., Gruber, A., Kidd, R., De Jeu, R. A. M., Dorigo, W. A., Barichivich, J., Osborn, T. J., Harris, I., Van Der Schrier, G., Jones, P. D., Miralles, D. G., Martens, B., Beck, H. E., Dolman, A. J., Jimenez, C., Mccabe, M. F., Wood, E. F., Allan, R., Azorin-molina, C., Mears, C. A., Mcvicar, T. R., Mayer, M., Schenzinger, V., Hersbach, H., Stackhouse, P. W., Jr., Wong, T., Kratz, D. P., Sawaengphokhai, P., Wilber, A. C., Gupta, S. K., Loeb, N. G., Dlugokencky, E. J., Hall, B. D., Montzka, S. A., Dutton, G., Muhle, J., Elkins, J. W., Miller, Br, Remy, S., Bellouin, N., Kipling, Z., Ades, M., Benedetti, A., Boucher, O., Weber, M., Steinbrecht, W., Arosio, C., Van Der A, R., Frith, S. M., Anderson, J., Coldewey-egbers, M., Davis, S., Degenstein, D., Fioletov, V. E., Froidevaux, L., Hubert, D., Long, C. S., Loyola, D., Rozanov, A., Roth, C., Sofieva, V., Tourpali, K., Wang, R., Wild, J. D., Davis, S. M., Rosenlof, K. H., Hurst, D. F., Selkirk, H. B., Vomel, H., Ziemke, J. R., Cooper, O. R., Flemming, J., Inness, A., Pinty, B., Kaiser, J. W., Van Der Werf, G. R., Hemming, D. L., Garforth, J., Park, T., Richardson, A. D., Rutishauser, T., Sparks, T. H., Thackeray, S. J., Myneni, R., Lumpkin, R., Huang, B., Kennedy, J., Xue, Y., Zhang, H. -m., Hu, C., Wang, M., Johnson, G. C., Lyman, J. M., Boyer, T., Cheng, L., Domingues, C. M., Gilson, J., Ishii, M., Killick, R. E., Monselesan, D., Purkey, S. G., Wijffels, S. E., Locarnini, R., Yu, L., Jin, X., Stackhouse, P. W., Kato, S., Weller, R. A., Thompson, P. R., Widlansky, M. J., Leuliette, E., Sweet, W., Chambers, D. P., Hamlington, B. D., Jevrejeva, S., Marra, J. J., Merrifield, M. A., Mitchum, G. T., Nerem, R. S., Kelble, C., Karnauskas, M., Hubbard, K., Goni, G., Streeter, C., Dohan, K., Franz, B. A., Cetinic, I., Karakoylu, E. M., Siegel, D. A., Westberry, T. K., Feely, R. A., Wanninkhof, R., Carter, B. R., Landschutzer, P., Sutton, A. J., Cosca, C., Trinanes, J. A., Baxter, S., Schreck, C., Bell, G. D., Mullan, A. B., Pezza, A. B., Coelho, C. A. S., Wang, B., He, Q., Diamond, H. J., Schreck, C. J., Blake, E. S., Landsea, C. W., Wang, H., Goldenberg, S. B., Pasch, R. J., Klotzbach, P. J., Kruk, M. C., Camargo, S. J., Trewin, B. C., Pearce, P. R., Lorrey, A. M., Domingues, R., Goni, G. J., Knaff, J. A., Lin, I. -i., Bringas, F., Richter-menge, J., Osborne, E., Druckenmiller, M., Jeffries, M. O., Overland, J. E., Hanna, E., Hanssen-bauer, I., Kim, S. -j., Walsh, J. E., Bhatt, U. S., Timmermans, M. -l., Ladd, C., Perovich, D., Meier, W., Tschudi, M., Farrell, S., Hendricks, S., Gerland, S., Haas, C., Krumpen, T., Polashenski, C., Ricker, R, Webster, M., Stabeno, P. J., Tedesco, M., Box, J. E., Cappelen, J., Fausto, R. S., Fettweis, X., Andersen, J. K., Mote, T., Smeets, C. J. P. P., Van As, D., Van De Wal, R. S. W., Romanovsky, V. E., Smith, S. L., Shiklomanov, N. I., Kholodov, A. L., Drozdov, D. S., Malkova, G. V., Marchenko, S. S., Jella, K. B., Mudryk, L., Brown, R., Derksen, C., Luojus, K., Decharme, B., Holmes, R. M., Shiklomanov, A. I., Suslova, A., Tretiakov, M., Mcclelland, J. W., Spencer, R. G. M., Tank, S. E., Epstein, H., Bhatt, U., Raynolds, M., Walker, D., Forbes, B., Phoenix, G., Bjerke, J., Tommervik, H., Karlsen, S. -r., Goetz, S., Jia, G., Bernhard, G. H., Grooss, J. -u., Ialongo, I., Johnsen, B., Lakkala, K., Manney, G. L., Mueller, R., Scambos, T., Stammerjohn, S., Clem, K. R., Barreira, S., Fogt, R. L., Colwell, S., Keller, L. M., Lazzara, M. A., Reid, P., Massom, R. A., Lieser, J. L., Meijers, A., Sallee, J. -b., Grey, A., Johnson, K., Arrigo, K., Swart, S., King, B., Meredith, M., Mazloff, M., Scardilli, A., Claus, F., Shuman, C. A., Kramarova, N., Newman, P. A., Nash, E. R., Strahan, S. E., Johnson, B., Pitts, M., Santee, M. L., Petropavlovskikh, I., Braathen, G. O., Coy, L., De Laat, J., Bissolli, P., Ganter, C., Li, T., Mekonnen, A., Gleason, K., Smith, A., Fenimore, C., Heim, R. R., Jr., Nauslar, N. J., Brown, T. J., Mcevoy, D. J., Lareau, N. P., Amador, J. A., Hidalgo, H. G., Alfaro, E. J., Calderon, B., Mora, N., Stephenson, T. S., Taylor, M. A., Trotman, A. R., Van Meerbeeck, C. J., Campbell, J. D., Brown, A., Spence, J., Martinez, R., Diaz, E., Marin, D., Hernandez, R., Caceres, L., Zambrano, E., Nieto, J., Marengo, J. A., Espinoza, J. C., Alves, L. M., Ronchail, J., Lavado-casimiro, J. W., Ramos, I., Davila, C., Ramos, A. M., Diniz, F. A., Aliaga-nestares, V., Castro, A. Y., Stella, J. L., Aldeco, L. S., Diaz, D. A. Campos, Misevicius, N., Kabidi, K., Sayouri, A., Elkharrim, M., Mostafa, A. E., Hagos, S., Feng, Z., Ijampy, J. A., Sima, F., Francis, S. D., Tsidu, G. Mengistu, Kruger, A. C., Mcbride, C., Jumaux, G., Dhurmea, K. R., Belmont, M., Rakotoarimalala, C. L., Labbe, L., Rosner, B., Benedict, I., Van Heerwaarden, C., Weerts, A., Hazeleger, W., Trachte, K., Zhu, Z., Zhang, P., Lee, T. C., Ripaldi, A., Mochizuki, Y., Lim, J. -y, Oyunjargal, L., Timbal, B., Srivastava, A. K., Revadekar, J. V., Rajeevan, M., Shimpo, A., Khoshkam, M., Kazemi, A. Fazl, Zeyaeyan, S., Lander, M. A., Mcgree, S., Tobin, S., Bettio, L., Arndt, D. S., Blunden, J., Dunn, R. J. H., Stanitski, D. M., Gobron, N., Willett, K. M., Sanchez-lugo, A., Berrisford, P., Morice, C., Nicolas, Jp, Carrea, L., Woolway, R. I., Merchant, C. J., Dokulil, M. T., De Eyto, E., Degasperi, C. L., Korhonen, J., Marszelewski, W., May, L., Paterson, A. M., Rusak, J. A., Schladow, S. G., Schmid, M., Verburg, P., Watanabe, S., Weyhenmeyer, G. A., King, A. D., Donat, M. G., Christy, J. R., Po-chedley, S., Mears, C. R., Haimberger, L., Covey, C., Randel, W., Noetzli, J., Biskaborn, B. K., Christiansen, H. H., Isaksen, K., Schoeneich, P., Smith, S., Vieira, G., Zhao, L., Streletskiy, D. A., Robinson, D. A., Pelto, M., Berry, D. I., Bosilovich, M. G., Simmons, A. J., Mears, C., Ho, S. P., Bock, O., Zhou, X., Nicolas, J, Vose, R. S., Adler, R., Gu, G., Becker, A., Yin, X, Tye, M. R., Blenkinsop, S., Durre, I., Ziese, M., Collow, A. B. Marquardt, Rustemeier, E., Foster, M. J., Di Girolamo, L., Frey, R. A., Heidinger, A. K., Sun-mack, S., Phillips, C., Menzel, W. P., Stengel, M., Zhao, G., Kim, H., Rodell, M., Li, B., Famiglietti, J. S., Scanlon, T., Van Der Schalie, R., Preimesberger, W., Reimer, C., Hahn, S., Gruber, A., Kidd, R., De Jeu, R. A. M., Dorigo, W. A., Barichivich, J., Osborn, T. J., Harris, I., Van Der Schrier, G., Jones, P. D., Miralles, D. G., Martens, B., Beck, H. E., Dolman, A. J., Jimenez, C., Mccabe, M. F., Wood, E. F., Allan, R., Azorin-molina, C., Mears, C. A., Mcvicar, T. R., Mayer, M., Schenzinger, V., Hersbach, H., Stackhouse, P. W., Jr., Wong, T., Kratz, D. P., Sawaengphokhai, P., Wilber, A. C., Gupta, S. K., Loeb, N. G., Dlugokencky, E. J., Hall, B. D., Montzka, S. A., Dutton, G., Muhle, J., Elkins, J. W., Miller, Br, Remy, S., Bellouin, N., Kipling, Z., Ades, M., Benedetti, A., Boucher, O., Weber, M., Steinbrecht, W., Arosio, C., Van Der A, R., Frith, S. M., Anderson, J., Coldewey-egbers, M., Davis, S., Degenstein, D., Fioletov, V. E., Froidevaux, L., Hubert, D., Long, C. S., Loyola, D., Rozanov, A., Roth, C., Sofieva, V., Tourpali, K., Wang, R., Wild, J. D., Davis, S. M., Rosenlof, K. H., Hurst, D. F., Selkirk, H. B., Vomel, H., Ziemke, J. R., Cooper, O. R., Flemming, J., Inness, A., Pinty, B., Kaiser, J. W., Van Der Werf, G. R., Hemming, D. L., Garforth, J., Park, T., Richardson, A. D., Rutishauser, T., Sparks, T. H., Thackeray, S. J., Myneni, R., Lumpkin, R., Huang, B., Kennedy, J., Xue, Y., Zhang, H. -m., Hu, C., Wang, M., Johnson, G. C., Lyman, J. M., Boyer, T., Cheng, L., Domingues, C. M., Gilson, J., Ishii, M., Killick, R. E., Monselesan, D., Purkey, S. G., Wijffels, S. E., Locarnini, R., Yu, L., Jin, X., Stackhouse, P. W., Kato, S., Weller, R. A., Thompson, P. R., Widlansky, M. J., Leuliette, E., Sweet, W., Chambers, D. P., Hamlington, B. D., Jevrejeva, S., Marra, J. J., Merrifield, M. A., Mitchum, G. T., Nerem, R. S., Kelble, C., Karnauskas, M., Hubbard, K., Goni, G., Streeter, C., Dohan, K., Franz, B. A., Cetinic, I., Karakoylu, E. M., Siegel, D. A., Westberry, T. K., Feely, R. A., Wanninkhof, R., Carter, B. R., Landschutzer, P., Sutton, A. J., Cosca, C., Trinanes, J. A., Baxter, S., Schreck, C., Bell, G. D., Mullan, A. B., Pezza, A. B., Coelho, C. A. S., Wang, B., He, Q., Diamond, H. J., Schreck, C. J., Blake, E. S., Landsea, C. W., Wang, H., Goldenberg, S. B., Pasch, R. J., Klotzbach, P. J., Kruk, M. C., Camargo, S. J., Trewin, B. C., Pearce, P. R., Lorrey, A. M., Domingues, R., Goni, G. J., Knaff, J. A., Lin, I. -i., Bringas, F., Richter-menge, J., Osborne, E., Druckenmiller, M., Jeffries, M. O., Overland, J. E., Hanna, E., Hanssen-bauer, I., Kim, S. -j., Walsh, J. E., Bhatt, U. S., Timmermans, M. -l., Ladd, C., Perovich, D., Meier, W., Tschudi, M., Farrell, S., Hendricks, S., Gerland, S., Haas, C., Krumpen, T., Polashenski, C., Ricker, R, Webster, M., Stabeno, P. J., Tedesco, M., Box, J. E., Cappelen, J., Fausto, R. S., Fettweis, X., Andersen, J. K., Mote, T., Smeets, C. J. P. P., Van As, D., Van De Wal, R. S. W., Romanovsky, V. E., Smith, S. L., Shiklomanov, N. I., Kholodov, A. L., Drozdov, D. S., Malkova, G. V., Marchenko, S. S., Jella, K. B., Mudryk, L., Brown, R., Derksen, C., Luojus, K., Decharme, B., Holmes, R. M., Shiklomanov, A. I., Suslova, A., Tretiakov, M., Mcclelland, J. W., Spencer, R. G. M., Tank, S. E., Epstein, H., Bhatt, U., Raynolds, M., Walker, D., Forbes, B., Phoenix, G., Bjerke, J., Tommervik, H., Karlsen, S. -r., Goetz, S., Jia, G., Bernhard, G. H., Grooss, J. -u., Ialongo, I., Johnsen, B., Lakkala, K., Manney, G. L., Mueller, R., Scambos, T., Stammerjohn, S., Clem, K. R., Barreira, S., Fogt, R. L., Colwell, S., Keller, L. M., Lazzara, M. A., Reid, P., Massom, R. A., Lieser, J. L., Meijers, A., Sallee, J. -b., Grey, A., Johnson, K., Arrigo, K., Swart, S., King, B., Meredith, M., Mazloff, M., Scardilli, A., Claus, F., Shuman, C. A., Kramarova, N., Newman, P. A., Nash, E. R., Strahan, S. E., Johnson, B., Pitts, M., Santee, M. L., Petropavlovskikh, I., Braathen, G. O., Coy, L., De Laat, J., Bissolli, P., Ganter, C., Li, T., Mekonnen, A., Gleason, K., Smith, A., Fenimore, C., Heim, R. R., Jr., Nauslar, N. J., Brown, T. J., Mcevoy, D. J., Lareau, N. P., Amador, J. A., Hidalgo, H. G., Alfaro, E. J., Calderon, B., Mora, N., Stephenson, T. S., Taylor, M. A., Trotman, A. R., Van Meerbeeck, C. J., Campbell, J. D., Brown, A., Spence, J., Martinez, R., Diaz, E., Marin, D., Hernandez, R., Caceres, L., Zambrano, E., Nieto, J., Marengo, J. A., Espinoza, J. C., Alves, L. M., Ronchail, J., Lavado-casimiro, J. W., Ramos, I., Davila, C., Ramos, A. M., Diniz, F. A., Aliaga-nestares, V., Castro, A. Y., Stella, J. L., Aldeco, L. S., Diaz, D. A. Campos, Misevicius, N., Kabidi, K., Sayouri, A., Elkharrim, M., Mostafa, A. E., Hagos, S., Feng, Z., Ijampy, J. A., Sima, F., Francis, S. D., Tsidu, G. Mengistu, Kruger, A. C., Mcbride, C., Jumaux, G., Dhurmea, K. R., Belmont, M., Rakotoarimalala, C. L., Labbe, L., Rosner, B., Benedict, I., Van Heerwaarden, C., Weerts, A., Hazeleger, W., Trachte, K., Zhu, Z., Zhang, P., Lee, T. C., Ripaldi, A., Mochizuki, Y., Lim, J. -y, Oyunjargal, L., Timbal, B., Srivastava, A. K., Revadekar, J. V., Rajeevan, M., Shimpo, A., Khoshkam, M., Kazemi, A. Fazl, Zeyaeyan, S., Lander, M. A., Mcgree, S., Tobin, S., and Bettio, L.

Published
2019

24. A Damage Model for the Simulation of Delamination in Advanced Composites under Variable-Mode Loading

Author

Turon, A, Camanho, P. P, Costa, J, and Davila, C. G

Subjects
Composite Materials
Abstract

A thermodynamically consistent damage model is proposed for the simulation of progressive delamination in composite materials under variable-mode ratio. The model is formulated in the context of Damage Mechanics. A novel constitutive equation is developed to model the initiation and propagation of delamination. A delamination initiation criterion is proposed to assure that the formulation can account for changes in the loading mode in a thermodynamically consistent way. The formulation accounts for crack closure effects to avoid interfacial penetration of two adjacent layers after complete decohesion. The model is implemented in a finite element formulation, and the numerical predictions are compared with experimental results obtained in both composite test specimens and structural components.

Published
2006

25. Failure Models and Criteria for FRP Under In-Plane or Three-Dimensional Stress States Including Shear Non-Linearity

Author

Pinho, Silvestre T, Davila, C. G, Camanho, P. P, Iannucci, L, and Robinson, P

Subjects
Composite Materials
Abstract

A set of three-dimensional failure criteria for laminated fiber-reinforced composites, denoted LaRC04, is proposed. The criteria are based on physical models for each failure mode and take into consideration non-linear matrix shear behaviour. The model for matrix compressive failure is based on the Mohr-Coulomb criterion and it predicts the fracture angle. Fiber kinking is triggered by an initial fiber misalignment angle and by the rotation of the fibers during compressive loading. The plane of fiber kinking is predicted by the model. LaRC04 consists of 6 expressions that can be used directly for design purposes. Several applications involving a broad range of load combinations are presented and compared to experimental data and other existing criteria. Predictions using LaRC04 correlate well with the experimental data, arguably better than most existing criteria. The good correlation seems to be attributable to the physical soundness of the underlying failure models.

Published
2005

27. Numerical Simulation of Delamination Growth in Composite Materials

Author

Camanho, P. P, Davila, C. G, and Ambur, D. R

Subjects
Structural Mechanics
Abstract

The use of decohesion elements for the simulation of delamination in composite materials is reviewed. The test methods available to measure the interfacial fracture toughness used in the formulation of decohesion elements are described initially. After a brief presentation of the virtual crack closure technique, the technique most widely used to simulate delamination growth, the formulation of interfacial decohesion elements is described. Problems related with decohesion element constitutive equations, mixed-mode crack growth, element numerical integration and solution procedures are discussed. Based on these investigations, it is concluded that the use of interfacial decohesion elements is a promising technique that avoids the need for a pre-existing crack and pre-defined crack paths, and that these elements can be used to simulate both delamination onset and growth.

Published
2001

28. Multi-Gas Sensors for Enhanced Reliability of SOFC Operation

Author

Potyrailo, Radislav A., primary, Brewer, J., additional, Scherer, B., additional, Srivastava, V., additional, Nayeri, M., additional, Henderson, C., additional, Collazo-Davila, C., additional, Carpenter, M. A., additional, Houlihan, N., additional, Vulcano Rossi, V., additional, and Shapiro, Andrew, additional

Published
2019
Full Text
View/download PDF

38. Analysis of Tile-Reinforced Composite Armor

Author

Davila, C. G, Chen, Tzi-Kang, and Baker, D. J

Subjects
Composite Materials
Abstract

The results of an analytical and experimental study of the structural response and strength of tile-reinforced components of the Composite Armored Vehicle are presented. The analyses are based on specialized finite element techniques that properly account for the effects of the interaction between the armor tiles, the surrounding elastomers, and the glass-epoxy sublaminates. To validate the analytical predictions, tests were conducted with panels subjected to three-point bending loads. The sequence of progressive failure events for the laminates is described. This paper describes the results of Part 1 of a study of the response and strength of tile-reinforced composite armor.

Published
1998

39. “It Ruined My Life”: The effects of the War on Drugs on people who inject drugs (PWID) in rural Puerto Rico

Author

Abadie, Roberto, Gelpi-Acosta, C., Davila, C., Rivera, A., Welch-Lazoritz, Melissa, Dombrowski, Kirk, Abadie, Roberto, Gelpi-Acosta, C., Davila, C., Rivera, A., Welch-Lazoritz, Melissa, and Dombrowski, Kirk

Abstract

Background—The War on Drugs has raised the incarceration rates of racial minorities for non-violent drug-related crimes, profoundly stigmatized drug users, and redirected resources from drug prevention and treatment to militarizing federal and local law enforcement. Yet, while some states consider shifting their punitive approach to drug use, to one based on drug treatment and rehabilitation, nothing suggests that these policy shifts are being replicated in Puerto Rico. Methods—This paper utilizes data from 360 PWID residing in four rural towns in the mountainous area of central Puerto Rico. We initially recruited 315 PWID using respondent-driven sampling (RDS) and collected data about risk practices and conducted HIV and HCV testing. During a second phase, we conducted 34 micro-ethnographic assays, in which we randomly recruited 34 participants from the first phase and included their ego networks in this phase. Our ethnographic inquiry produced significant data regarding the effects of the war on drugs on the local drug trade, drug availability, and injectors’ social networks. Results—Findings suggest that repressive policing has been ineffective in preventing drug distribution and use among those in our study. This type of law enforcement approach has resulted in the disproportionate incarceration of poor drug users in rural Puerto Rico, and mainly for nonviolent drug-related crimes. In addition, incarceration exposes PWID to a form of a cruel and unusual punishment: having to quit heroin “cold turkey” while the prison environment also represents a HIV/HCV risk. In turn, the war on drugs not only diverts resources from treatment but also shapes treatment ideologies, punishing non-compliant patients. Conclusion—Shifting the emphasis from repression to treatment and rehabilitation is likely to have a positive impact on the health and overall quality of life of PWID and their communities.

Published
2018

40. Cross-surface interface element for coupling built-up structural subdomains

Author

Davila, C. G, Ransom, J. B, and Aminpour, M. A

Subjects
Structural Mechanics
Abstract

A new finite element for coupling built-up shell substructures is presented. The present work extends the hybrid variational formulation of the interface element developed by Aminpour and Ransom to permit coupling between two intersecting substructures. Designed for the assembly of independently built-up finite element models, this technique provides a level of modeling flexibility previously unavailable.

Published
1994

41. DNA Metabarcoding of Amazonian Ichthyoplankton Swarms

Author

Maggia, M. E., Vigouroux, Y., Renno, J. F., Duponchelle, F., Desmarais, Erick, Nunez, J., Garcia-Davila, C., Carvajal-Vallejos, F. M., Paradis, E., Martin, Jean-François, Mariac, C., Diversité, adaptation, développement des plantes (UMR DIADE), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Instituto de Investigaciones de la Amazonía Peruana (IIAP), FAUNAGUA : Instituto de Investigaciones Aplicadas de los Recursos del Agua, Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Instituto de Investigaciones Aplicadas de los Recursos del Agua [Bolivie] (FAUNAGUA), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Diversité, adaptation, développement des plantes ( DIADE ), Centre de Coopération Internationale en Recherche Agronomique pour le Développement ( CIRAD ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ) -Institut de Recherche pour le Développement ( IRD [France-Sud] ), Biologie des Organismes et Ecosystèmes Aquatiques ( BOREA ), Université des Antilles ( UA ) -Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Institut de Recherche pour le Développement ( IRD ) -Muséum National d'Histoire Naturelle ( MNHN ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Instituto de Investigaciones de la Amazonía Peruana ( IIAP ), Institut des Sciences de l'Evolution de Montpellier ( ISEM ), Université de Montpellier ( UM ) -Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique ( CNRS ), Centre de Biologie pour la Gestion des Populations ( CBGP ), Centre de Coopération Internationale en Recherche Agronomique pour le Développement ( CIRAD ) -Centre international d'études supérieures en sciences agronomiques ( Montpellier SupAgro ) -Institut national de la recherche agronomique [Montpellier] ( INRA Montpellier ) -Université de Montpellier ( UM ) -Institut de Recherche pour le Développement ( IRD [France-Sud] ) -Institut national d’études supérieures agronomiques de Montpellier ( Montpellier SupAgro ), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)

Subjects
Next-Generation Sequencing, Life Cycles, Bioinformatics, Molecular biology, Sequence Databases, lcsh:Medicine, Artificial Gene Amplification and Extension, Research and Analysis Methods, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, Polymerase Chain Reaction, Database and Informatics Methods, Larvae, Sequencing techniques, parasitic diseases, Genetics, Animals, DNA Barcoding, Taxonomic, DNA sequencing, lcsh:Science, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, lcsh:R, fungi, Organisms, Fishes, Dideoxy DNA sequencing, Biology and Life Sciences, Computational Biology, High-Throughput Nucleotide Sequencing, Genomics, Genome Analysis, Genomic Libraries, Freshwater Fish, Biological Databases, Molecular biology techniques, Larva, Vertebrates, lcsh:Q, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Sequence Analysis, Transcriptome Analysis, Sequence Alignment, [ SDV.BID.SPT ] Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, Research Article, Developmental Biology
Abstract

International audience; Tropical rainforests harbor extraordinary biodiversity. The Amazon basin is thought to hold 30% of all river fish species in the world. Information about the ecology, reproduction, and recruitment of most species is still lacking, thus hampering fisheries management and successful conservation strategies. One of the key understudied issues in the study of population dynamics is recruitment. Fish larval ecology in tropical biomes is still in its infancy owing to identification difficulties. Molecular techniques are very promising tools for the identification of larvae at the species level. However, one of their limits is obtaining individual sequences with large samples of larvae. To facilitate this task, we developed a new method based on the massive parallel sequencing capability of next generation sequencing (NGS) coupled with hybridization capture. We focused on the mitochondrial marker cytochrome oxidase I (COI). The results obtained using the new method were compared with individual larval sequencing. We validated the ability of the method to identify Amazonian catfish larvae at the species level and to estimate the relative abundance of species in batches of larvae. Finally, we applied the method and provided evidence for strong temporal variation in reproductive activity of catfish species in the Ucayalí River in the Peruvian Amazon. This new time and cost effective method enables the acquisition of large datasets, paving the way for a finer understanding of reproductive dynamics and recruitment patterns of tropical fish species, with major implications for fisheries management and conservation.

Published
2017

42. Computation of strain energy release rates for skin-stiffener debonds modeled with plate elements

Author

Wang, J. T, Raju, I. S, Davila, C. G, and Sleight, D. W

Subjects
Structural Mechanics
Abstract

An efficient method for predicting the strength of debonded composite skin-stiffener configurations is presented. This method, which is based on fracture mechanics, models the skin and the stiffener with two-dimensional (2D) plate elements instead of three-dimensional (3D) solid elements. The skin and stiffener flange nodes are tied together by two modeling techniques. In one technique, the corresponding flange and skin nodes are required to have identical translational and rotational degrees-of-freedom. In the other technique, the corresponding flange and skin nodes are only required to have identical translational degrees-of-freedom. Strain energy release rate formulas are proposed for both modeling techniques. These formulas are used for skin-stiffener debond cases with and without cylindrical bending deformations. The cylindrical bending results are compared with plane-strain finite element results. Excellent agreement between the two sets of results is obtained when the second technique is used. Thus, from these limited studies, a preferable modeling technique for skin-stiffener debond analysis using plate elements is established.

Published
1993

46. SHIELD: A novel NFV-based cybersecurity framework

Author

Gardikis, G., primary, Tzoulas, K., additional, Tripolitis, K., additional, Bartzas, A., additional, Costicoglou, S., additional, Lioy, Antonio, additional, Gaston, B., additional, Fernandez, C., additional, Davila, C., additional, Litke, A., additional, Papadakis, N., additional, Papadopoulos, D., additional, Pastor, A., additional, Nunez, J., additional, Jacquin, L., additional, Attak, H., additional, Davri, N., additional, Xylouris, G., additional, Kafetzakis, M., additional, Katsianis, D., additional, Neokosmidis, I., additional, Terranova, M., additional, Giustozzi, C., additional, Batista, T., additional, Preto, R., additional, Trouva, E., additional, Angelopoulos, Y., additional, and Kourtis, A., additional

Published
2017
Full Text
View/download PDF

48. Soluble or soluble/membrane TNF-alpha inhibitors protect the brain from focal ischemic injury in rats

Author

Arango-Davila C, Vera A, Londono A, Echeverri A, Canas F, Cardozo C, Orozco J, Rengifo J, and Canas C

Subjects
anti TNF-alpha, experimental brain research, infliximab, etanercept, brain ischemia
Abstract

Tumor Necrosis Factor-alpha (TNF-alpha) is an immunomodulatory and proinflammatory cytokine implicated in neuro-inflammation and neuronal damage in response to cerebral ischemia. The present study tested the hypothesis that anti-TNF-alpha agents may be protective against cerebral infarction. Transient focal ischemia was artificially induced in anesthetized adult male Wistar rats (300-350 g) by middle cerebral artery occlusion (MCAO) with an intraluminal suture. TNF-alpha function was interfered with either a chimeric monoclonal antibody against TNF-alpha (infliximab-7 mg/kg) aiming to TNF-alpha soluble and membrane-attached form; or a chimeric fusion protein of TNF-alpha receptor-2 with a fragment crystallizable (Fc) region of IgG1 (etanercept-5 mg/kg) aiming for the TNF-alpha soluble form. Both agents were administered intraperitoneally 0 or 6 h after inducing ischemia. Infarct volume was measured by 2,3,5-triphenyltetrazolium chloride staining. Cerebral infarct volume was significantly reduced in either etanercept or infliximab-treated group compared with non-treated MCAO rats 24 h after reperfusion. These results suggest that anti-TNF-alpha agents may reduce focal ischemic injury in rats.

Published
2015

49. Influence of dietary protein and lipid levels on growth performance and the incidence of cannibalism in Pseudoplatystoma punctifer (Castelnau, 1855) larvae and early juveniles

Author

Darias, Maria Jose, Castro-Ruiz, D., Estivals, Guillain, Quazuguel, P., Fernandez-Mendez, C., Nunez Rodriguez, Jesus, Clota, F., Gilles, Sylvain, Garcia-Davila, C., Gisbert, E., Cahu, C., Darias, Maria Jose (ed.), Amadio, S.A. (ed.), and Rosenthal, H. (ed.)

Subjects
animal structures
Abstract

The aim of the study was to evaluate the influence of different dietary protein and lipid levels and their ratios on larval growth, survival and the incidence of cannibalism in Pseudoplatystoma punctifer. Larvae were raised in a recirculation system from 3 to 26days post-fertilization (dpf) (2-25days post hatching, dph) at an initial density of 40 larvae L-1, 27.8 +/- 0.65 degrees C and 0L:24D photoperiod. Larvae were fed from 4 to 12 dpf with Artemia nauplii and weaned onto four different compound diets from 13 dpf within 3days, then fed exclusively with these diets until 26 dpf. These diets contained 30:15, 30:10, 45:15 or 45:10 protein:lipid (P:L) (in % of dry matter) levels. A control group was fed Artemia nauplii until 17 dpf and weaned thereafter with the 45P:10L compound diet. The experiment was carried out in triplicate. Results showed higher growth and survival rates and lower incidence of cannibalism in the group fed the 45P:15L diet than in the other treatments. Differences in larval survival and growth performance were associated with the higher protein and lipid content rather than the protein:lipid ratio of this diet. When comparing diets with the same protein level, the increase in dietary lipid led to an improvement in growth, suggesting that energy from lipids spares protein for growth in P.punctifer fingerlings. An Artemia feeding period longer than 12 dpf did not improve larval growth or survival.

Published
2015

Catalog

Books, media, physical & digital resources
See catalog results