Bibliografías temáticas / FFRP

Índice

Artículos de revistas
Tesis
Libros
Capítulos de libros
Actas de conferencias
Informes

Literatura académica sobre el tema "FFRP"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 10 de febrero de 2022

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte las listas temáticas de artículos, libros, tesis, actas de conferencias y otras fuentes académicas sobre el tema "FFRP".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Artículos de revistas sobre el tema "FFRP"

Wang, Xian y Li. "Effects of Fiber Surface Grafting with Nano-Clay on the Hydrothermal Ageing Behaviors of Flax Fiber/Epoxy Composite Plates". Polymers 11, n.º 8 (31 de julio de 2019): 1278. http://dx.doi.org/10.3390/polym11081278.

Texto completo

Resumen

Flax fiber has high sensitivity to moisture, and moisture uptake leads to the decrease of mechanical properties and distortion in shape. This paper attempts to graft flax fabric with nano-clay, with assistance from a silane-coupling agent, in order to improve hygrothermal resistance. The nano-clay grafted flax fabric reinforced epoxy (FFRP) composite produced through vacuum assisted resin infusion (VARI) process were subjected to 80% RH chamber for 12 weeks at 20, 40 and 70 °C, respectively. Moisture uptake, dimensional stability, and tensile properties was studied as a function of humidity exposure. Through SEM and FTIR, the effects of hygrothermal exposure was elucidated. In comparison to control FFRP plates, nano-clay grafting decreases saturation moisture uptake and the coefficient of diffusion of FFRP by 38.4% and 13.2%, respectively. After exposure for six weeks, the retention rate of the tensile modulus of the nano-clay grafted flax fiber based FFRP increased by 33.8% compared with that of the control ones. Nano-clay grafting also reduces the linear moisture expansion coefficient of FFRPs by 8.4% in a radial direction and 10.9% in a weft direction.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Yan, Libo, Nawawi Chouw y Bohumil Kasal. "Experimental study and numerical simulation on bond between FFRP and CFRC components". Journal of Reinforced Plastics and Composites 36, n.º 4 (13 de diciembre de 2016): 305–20. http://dx.doi.org/10.1177/0731684416683453.

Texto completo

Resumen

Natural flax fabric-reinforced polymer (FFRP) tube encased coir fibre-reinforced concrete (CFRC) structure (termed as FFRP-CFRC) is steel-free hybrid structure that has shown its potential as axial, flexural and earthquake-resistant structural members. An FFRP plate with a CFRC overlay has great potential to be light and environmentally friendly wall panel or pedestrian bridge deck. The overall structural performance of this panel or deck is highly dependent on the bond at the FFRP and CFRC interface. Therefore, this study proposed a novel interlocking at their interface to improve the bond and thus the composite action of the hybrid structures composed of FFRP and CFRC components. This interlocking was generated by creating numbers of perforations on the FFRP component (tube and plate) surface. To evaluate the effectiveness of using this interlocking on the bond behaviour between FFRP and CFRC, two stages experimental studies were conducted. In the first stage, 18 FFRP-CFRC cylindrical specimens were constructed and tested under push-out bond, bending and axial compression. In the second stage, 30 FFRP plate and CFRC sandwich block specimens were constructed and tested under push-out bond considering different experimental parameters, i.e. depth, diameter and number of perforations. Additionally, numerical simulation was performed to verify the failure modes of FFRP plate and CFRC sandwich blocks under push-out. This study revealed that the presence of interlocking is an effective way to improve the interfacial bond and composite action between FFRP (either tube or plate) and CFRC components.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Yan, Li Bo, Nawawi Chouw y Krishnan Jayaraman. "Experimental Investigation of Flax FRP Tube Confined Coconut Fibre Reinforced Concrete". Key Engineering Materials 594-595 (diciembre de 2013): 416–20. http://dx.doi.org/10.4028/www.scientific.net/kem.594-595.416.

Texto completo

Resumen

The compressive and flexural performance of flax fibre reinforced polymer (FFRP) confined coconut fibre reinforced concrete (CFRC) structures were investigated. The mass content of coconut fibre considered was 1% of cement. Eighteen cylinders were tested under uniaxial compression and 12 beams were tested under four-point bending. Test results show that in compression, both FFRP tube and FFRP wrapping confinements enhance the axial compressive strength and ultimate strain of concrete significantly, e.g. the ultimate strength of 4-layer FFRP tube confined CFRC is 94% larger than that of the unconfined CFRC. In flexure, the FFRP tube increases the lateral load bearing capacity and the deflection several times larger than the unconfined concrete columns, e.g. the ultimate lateral load of 4-layer FFRP confined PC and CFRC are 1066% and 946% larger than the corresponding unconfined PC and CFRC specimens. In flexure, coir inclusion can affect the failure mode of the FFRP-CFRC composite structure significantly.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Wang y Petrů. "Effect of Hygrothermal Aging and Surface Treatment on the Dynamic Mechanical Behavior of Flax Fiber Reinforced Composites". Materials 12, n.º 15 (25 de julio de 2019): 2376. http://dx.doi.org/10.3390/ma12152376.

Texto completo

Resumen

The recent developments of FRP (fiber reinforced polymer) are towards the growth and usage of natural FRP in the field of engineering due to both environmental and economic benefits. Flax fiber is one of the most commonly used natural fibers. One of the critical factors affecting the mechanical behavior of FFRP (flax fiber reinforced polymer) is hygrothermal aging. Some experimental works have been conducted to investigate the effect of hydrothermal aging on static behavior of FFRP. However, fewer efforts have been made to study its damping properties after hydrothermal aging. In this paper, the effect of surface treatment (including alkalization, silanization, acetylation and alkali-silanization) on dynamic mechanical behavior of FFRP under hygrothermal aging is studied. The results show that water resistance and damping properties of FFRP are improved after surface treatment. The acetylation treated FFRP exhibits excellent damping performance among all treated specimens.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Bachtiar, Erik Valentine, Katarzyna Kurkowiak, Libo Yan, Bohumil Kasal y Torsten Kolb. "Thermal Stability, Fire Performance, and Mechanical Properties of Natural Fibre Fabric-Reinforced Polymer Composites with Different Fire Retardants". Polymers 11, n.º 4 (16 de abril de 2019): 699. http://dx.doi.org/10.3390/polym11040699.

Texto completo

Resumen

In this study, ammonium polyphosphate (APP) and aluminum hydroxide (ALH) with different mass contents were used as fire retardants (FRs) on plant-based natural flax fabric-reinforced polymer (FFRP) composites. Thermogravimetric analysis (TGA), limited oxygen index (LOI), and the Underwriters Laboratories (UL)-94 horizontal and vertical tests were carried out for evaluating the effectiveness of these FR treatments. Flat-coupon tensile test was performed to evaluate the effects of FR treatment on the mechanical properties of the FFRP composites. For both fire retardants, the results showed that the temperature of the thermal decomposition and the LOI values of the composites increased as the FR content increases. Under the UL-94 vertical test, the FFRP composites with 20% and 30% APP (i.e., by mass content of epoxy polymer matrix) were self-extinguished within 30 and 10 s following the removal of the flame without any burning drops, respectively. However, the mechanical tensile tests showed that the APP treated FFRP composites reduced their elastic modulus and strength up to 24% and 18%, respectively. Scanning electronic microscopic (SEM) for morphology examination showed an effective coating of the flax fibres with the FRs, which improved the flame retardancy of the treated composites.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Yan, Weian, Hassen Riahi, Karim Benzarti, Robert Chlela, Laurence Curtil y David Bigaud. "Durability and Reliability Estimation of Flax Fiber Reinforced Composites Using Tweedie Exponential Dispersion Degradation Process". Mathematical Problems in Engineering 2021 (9 de febrero de 2021): 1–21. http://dx.doi.org/10.1155/2021/6629637.

Texto completo

Resumen

Flax fiber reinforced composites are demonstrating promising outcomes which make them potential candidates to replace synthetic composites in various industrial applications. However, there is limited information regarding their long-term performance, and it is usually acknowledged that natural fibers are less resistant than their synthetic counterparts. In this context, it is crucial to study their durability before considering their use for structural rehabilitation and strengthening in construction. This research aims to study and predict the performance of flax fiber reinforced polymer (FFRP) composites with a biobased epoxy matrix. The test program consists in exposing FFRP laminates and FFRP strengthened concrete slabs to different accelerated ageing conditions over a total period of two years. In the present study, not a single stress variable but various combinations and coupling of two environmental stress variables, temperature (T) and relative humidity (RH), are considered, thereby distinguishing this study from most of the works reported in the literature. Then, a series of mechanical destructive tests are performed periodically on aged samples to evaluate property evolutions over ageing time. The collected experimental data are analyzed to develop a performance evolution model and to evaluate the service lifetime performance of this new biobased FFRP composite. For that, the potential of the Tweedie exponential dispersion (TED) process model, which takes some famous stochastic processes (Wiener process, Gamma process, and inverse Gaussian process) as special cases, is investigated. The TED process modeling, particularly interesting in the cases of complicated degradation mechanisms, is written here for destructive tests and, finally, a reliability analysis based on the TED process model determined is carried out in order to update the FRP design equations provided by international codes in the specific case of FFRP.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Mak, Kenneth y Amir Fam. "Performance of SiO2-impregnated flax fibre reinforced polymers under wet dry and freeze thaw cycles". Journal of Composite Materials 55, n.º 2 (5 de agosto de 2020): 251–63. http://dx.doi.org/10.1177/0021998320946811.

Texto completo

Resumen

Flax fibres are of growing interest as a reinforcing fibre; however, they are susceptible to moisture and have demonstrated poor bond to conventional hydrophobic resins. Although there are multiple approaches to address these issues, research has heavily focused on their short-term performance. In this research program, the performance of flax fibre reinforced polymer (FFRP), manufactured using SiO2-impregnated flax fibre, is assessed for its short-term performance as well as its long-term performance when exposed to wet-dry (WD) and freeze-thaw (FT) cycles. Treated FFRP showed improved bond between the fibre and resin as well as resistance to fibre pull-out. It exhibited a tensile strength of 144 ± 15 MPa and a tensile modulus of 8.6 ± 0.35 GPa. When exposed to WD cycles, delamination between the fibre and resin were observed. The onset of statistically significant mechanical damage occurred after four WD cycles, with a final 3% reduction in strength and a 6% reduction in modulus post-exposure. When exposed to FT cycles, FFRP experienced cracking within the fibre, as well as delamination at the interface. The onset of statistically significant mechanical damage occurred after 50 FT cycles, which manifested as a final 5% reduction in tensile strength and 10% reduction in tensile modulus post-exposure. Regardless of treatment, FFRP demonstrated the same damage mechanisms as untreated variants.

Los estilos APA, Harvard, Vancouver, ISO, etc.

SUZUKI, Masashi, Naoki AMANO y Hideaki KOIKE. "The DNA-binding domain of feast/famine regulatory protein, FFRP." Proceedings of the Japan Academy, Series B 79B, n.º 3 (2003): 92–98. http://dx.doi.org/10.2183/pjab.79b.92.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Zhang, Zhang, Shigeho Takarada y Sabee Molloi. "Quantification of absolute coronary flow reserve and relative fractional flow reserve in a swine animal model using angiographic image data". American Journal of Physiology-Heart and Circulatory Physiology 303, n.º 3 (1 de agosto de 2012): H401—H410. http://dx.doi.org/10.1152/ajpheart.00153.2012.

Texto completo

Resumen

Coronary flow reserve (CFR) and fractional flow reserve (FFR) are important physiological indexes for coronary disease. The purpose of this study was to validate the CFR and FFR measurement techniques using only angiographic image data. Fifteen swine were instrumented with an ultrasound flow probe on the left anterior descending artery (LAD). Microspheres were gradually injected into the LAD to create microvascular disruption. An occluder was used to produce stenosis. Contrast material injections were made into the left coronary artery during image acquisition. Volumetric blood flow from the flow probe (Q̇q) was continuously recorded. Angiography-based blood flow (Q̇a) was calculated by using a time-density curve based on the first-pass analysis technique. Flow probe-based CFR (CFRq) and angiography-based CFR (CFRa) were calculated as the ratio of hyperemic to baseline flow using Q̇q and Q̇a, respectively. Relative angiographic FFR (relative FFRa) was calculated as the ratio of the normalized Q̇a in LAD to the left circumflex artery (LCX) during hyperemia. Flow probe-based FFR (FFRq) was measured from the ratio of hyperemic flow with and without disease. CFRa showed a strong correlation with the gold standard CFRq (CFRa = 0.91 CFRq + 0.30; r = 0.90; P < 0.0001). Relative FFRa correlated linearly with FFRq (relative FFRa = 0.86 FFRq + 0.05; r = 0.90; P < 0.0001). The quantification of CFR and relative FFRa using angiographic image data was validated in a swine model. This angiographic technique can potentially be used for coronary physiological assessment during routine cardiac catheterization.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Wang, Wenjie y Nawawi Chouw. "Flexural behaviour of FFRP wrapped CFRC beams under static and impact loadings". International Journal of Impact Engineering 111 (enero de 2018): 46–54. http://dx.doi.org/10.1016/j.ijimpeng.2017.08.010.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Tesis sobre el tema "FFRP"

Hallonet, Anne. "Développement et caractérisation d'un matériau composite à base de fibres de lin : application au renforcement de structures en béton par collage externe". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1111/document.

Texto completo

Resumen

Afin de prolonger leur durée de vie et d'assurer la sécurité des usagers, les structures en béton peuvent nécessiter un renforcement au cours de leur durée de service. La technique de renforcement par collage externe, en surface, de composites renforcés de fibres de carbone, de verre ou d'aramide à l'aide de résines durcissant à température ambiante est largement employée pour son efficacité et sa facilité de mise oeuvre. Toutefois l'utilisation à la fois de fibres synthétiques et de matrices polymères produit un impact écologique non négligeable. L'objectif de ce travail de recherche est d'examiner la possibilité d'utiliser des fibres de lin pour le renforcement externe de structures en béton. Les propriétés mécaniques spécifiques et le bilan environnemental avantageux des fibres de lin en font une alternative intéressante aux fibres de verre. Cependant leur origine naturelle conduit à une plus grande variabilité des propriétés, à un comportement en traction non linéaire et une sensibilité accrue à l'humidité. Les principaux objectifs du travail de thèse portent ainsi sur la sélection des matériaux et la mise en oeuvre les plus adaptés, sur l'évaluation des performances du matériau et de son adhérence au support béton et sur une évaluation de la durabilité des propriétés du système. Dans une première partie expérimentale deux méthodes de mise en oeuvre du renfort à fibres de lin (stratification au contact et collage de lamelles rigides) sont développées et caractérisées. Des observations tomographies X confirment la bonne imprégnation des fibres et la cohésion des composites. Les essais de traction révèlent un comportement en traction bilinéaire comme décrit dans la littérature, avec des propriétés d'effort par largeur de bande comparables aux composites de renfort à fibres de verre. La caractérisation des interfaces composite/béton menée par tests de cisaillement à double recouvrement confirme une bonne adhérence qui se traduit par une rupture cohésive dans le substrat béton. La nature des fibres ne semble pas influencer le comportement de l'interface. Les systèmes de renforcement à fibres de lin sont donc capables de reprendre des efforts transmis par cisaillement de façon comparable aux matériaux de renfort à fibres de verre. Dans une deuxième partie des essais exploratoires de durabilité ont ensuite été menés pour vérifier la pérennité des propriétés de ces deux composites de renfort dans un environnement de service. Un vieillissement accéléré artificiel en enceinte climatique est mis en place tandis que des composites à fibres de lin stratifié au contact sont exposés pendant un an à l'environnement extérieur. Un second vieillissement hygrothermique à 70°C est mené pendant 4 semaines. Les dégradations des propriétés des composites à fibres de lin sont comparables à celles de certains composites de renfort à fibres de verre. Malgré la nature hydrophile des fibres de lin, les premiers essais ne montrent pas de dégradations des propriétés qui rendraient le composite impropre à une utilisation comme renfort extérieur de structures en béton
To extend their life and ensure the safety of users, concrete structures may need strengthening during their service life. The technique of strengthening by external bonding of composites carbon, glass or aramid composites using polymer that are cured at room temperature is widely used for its effectiveness and ease of implementation. Yet the uses of both synthetic fibers and polymer matrices have a significant environmental impact. The objective of this research is to examine the possibility of using flax fibers for the external strengthening of concrete structures. Their high specific mechanical properties and positive environmental balance make them an interesting alternative to the glass fibers. However, they also present a larger variability in properties, a non-linear tensile behavior and high sensitivity to humidity. The main objectives of this thesis involve the selection of the materials and the most suitable implementation, the evaluation of the materials’ performances and adherence to concrete support and a sustainability assessment of those properties. In a first experimental section, two methods of implementation of the flax fiber reinforcement are developed and characterized: by wet lay-up and by bonding of pre-hardened. Tomography observations confirm the good fiber impregnation and cohesion of the composites. The tensile tests show a bilinear tensile behavior as described in the literature, with stress per width at failure comparable to glass fibres strengthening systems. The characterization of composite/concrete interfaces is conducted by double overlap shear tests and confirms a good adhesion which results in concrete failure before the failure of the reinforcement system. The nature of the fibers does not appear to influence the shear behavior of the interface. For glass or flax wet lay-up systems, failure can occur with failure of the composite. Flax fiber reinforcement systems can take up the forces transmitted by shear in a manner comparable to glass composites. In the second part, sustainability tests were conducted to ensure the sustainability of the properties of these two composite reinforcements in a service environment. An artificial accelerated aging test in a climatic chamber is set up while wet lay-up flax fiber composites are exposed to the external environment during a year. A second hydrothermal aging test is conducted for 4 weeks at 70°C. The degradations of the properties of the flax composites are comparable to those of some glass reinforcement composites. Despite the hydrophilic nature of the flax fibers the first tests show no degradation of properties that would make the composite unsuitable for an external reinforcement of concrete structures

Los estilos APA, Harvard, Vancouver, ISO, etc.

Estevan, García Luis. "Estudio experimental del comportamiento a compresión de elementos pétreos confinados con materiales compuestos". Doctoral thesis, Universidad de Alicante, 2009. http://hdl.handle.net/10045/83431.

Texto completo

Resumen

La técnica del confinamiento es un recurso muy eficaz para mejorar la capacidad portante de los elementos comprimidos. En el caso particular de los soportes de piedra, los refuerzos se han venido realizando tradicionalmente con elementos metálicos; sin embargo, la reciente introducción de los materiales compuestos en la industria de la construcción ofrece un gran potencial y supone una alternativa muy interesante. El confinamiento con materiales compuestos ha sido ampliamente investigado durante los últimos años, si bien la inmensa mayoría de los estudios publicados se han centrado en el refuerzo de elementos de hormigón, mientras que las referencias acerca del zunchado de piezas de piedra o mampostería son muy escasas por el momento. Esta tesis se plantea, por consiguiente, a fin de poder ampliar en la medida de lo posible el estado del conocimiento en esta materia. En la investigación que se propone, de carácter básicamente experimental, se emplea como material base la Piedra de San Julián, una calcarenita con la que se encuentran construidos la mayoría de los edificios históricos de la ciudad de Alicante. En una primera fase del trabajo se estudian las propiedades del material pétreo intacto y sometido a condiciones adversas: exposición a temperaturas elevadas (mediante horno eléctrico o tratamiento con fuego real) o saturación con agua, a fin de evaluar la pérdida de capacidad mecánica de la roca en estas circunstancias. En una segunda fase se procede al refuerzo de las muestras de piedra con encamisados de distinta naturaleza, tanto polímeros reforzados con fibras (FRP) como morteros de base cementosa reforzados con mallas (FRCM), analizándose la respuesta de las piezas confinadas en función del tipo de material empleado y el tratamiento sufrido por la roca. La investigación concluye con un estudio en el que se comparan los resultados obtenidos experimentalmente con los modelos de confinamiento propuestos por las principales guías de diseño, a fin de valorar el nivel de precisión de dichos modelos para cada una de las situaciones contempladas en este trabajo.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Estevan, Luis. "Estudio experimental del comportamiento a compresión de elementos pétreos confinados con materiales compuestos". Doctoral thesis, Universidad de Alicante, 2018. http://hdl.handle.net/10045/83431.

Texto completo

Resumen

Los estilos APA, Harvard, Vancouver, ISO, etc.

Svedjeholm, Christoffer y Mikael Rödin. "UEFA Financial Fair Play - "break-even"-kraven : en konkurrensrättslig analys". Thesis, Linköpings universitet, Affärsrätt, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118627.

Texto completo

Resumen

2009 beslutade det europeiska fotbollsförbundet UEFA att införa regelverket Financial Fair Play Regulations, för att förbättra fotbollens ekonomiska hälsa. Detta som en följd av en allt mer ansvarslös och irrationell pengahantering bland europeiska fotbollsklubbar, med stora underskott och försenade betalningar som konsekvens. Ett avsnitt i regelverket berör de så kallade ”break-even”-kraven, som sätter begränsningar för hur stora underskott klubbar får visa upp. I vår uppsats har syftet varit att utreda huruvida ”break-even”-kraven är att anse som förenliga med EU-rättsliga konkurrensregler, specifikt art. 101.1 FEUF. Detta då kraven, enligt vår uppfattning, kan anses ha en konkurrenshämmande verkan i form av investeringsbegränsningar och en asymmetrisk effekt på transfermarknaden. För att kunna utreda den rättsliga giltigheten, har vi använt oss av relevant praxis på EU-nivå inom områdena konkurrensrätt och idrott. Eftersom regelverket är så pass nyutkommet, har det ännu inte hunnit prövas rättsligt på EU-nivå. I och med detta, har det för oss funnits stort utrymme för diskussion och hypotetiska scenarion. Vår studie av praxis har visat att bestämmelserna kan bedömas vara förenliga med EU-rätten, trots en konkurrensbegränsande verkan. I vår analys har vi därför, utifrån befintliga förutsättningar, diskuterat huruvida vi anser att ”break-even”-kraven ska bedömas vara förenliga med art. 101.1 FEUF, även om de kan anses ha en konkurrenshämmande effekt. Vi har vägt in både ekonomiska och sportsliga faktorer i vår analys, och har även diskuterat möjligheten till alternativa tillvägagångssätt.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Roquete, Fatima Ferreira. "Impactos da regulamentação estatal na gestão organizacional: o caso de uma cooperativa médica Unimed no Estado de Minas Gerais". Universidade Federal de Minas Gerais, 2002. http://hdl.handle.net/1843/FFRE-8C4LPK.

Texto completo

Resumen

The present studys objective was to analyze the impact of Government regulations on the managing of a Unimed health care co-op in the State of Minas Gerais. Within the context of Government Reform in Brazil, with the approval of Law n. 9.656, in June 1998, the activities of the companies that run private health care plans and insurance (or the segment of supplementary health care) in the Country were regulated. For such a study, a systemic approach to organizational analysis was used, and it dealt with six perspectives, that is, strategic, structural, technological, human, cultural and political. A Unimed health care co-op was chosen to be analyzed. This option was justified, particularly, by the fact that this kind of company is present in most regions and states in Brazil, and it is an alternative to the organizations of the competitive market. The study that was held was exploratory-descriptiveanalytic, and the approach adopted was that of qualitative analysis. Results demonstrated that those interviewed are aware of the environmental forces within this new context, to which the co-op is exposed. They reported that the organization has responded relatively quickly to environmental changes, mainly because a new administration, with a professional outlook, had taken over running the co-op in April 1998. Therefore, regulation offered the chance for this health care co-op to radically change its management style, thus becoming a professional and modern company. Strategic planning was adopted as a management tool, organizational strategies were altered, a new structure was implemented, deep and sweeping innovations were introduced in the technological area, and human resources relations were also changed. A highly qualified managerial team was set up, thus making administrative rationality available to the Unimed health care unit studied, which implied in the building a new culture. The restructuring of this organization, made necessary by the demands brought about by the regulation of the industry, has made viable not only its adaptation to this new context but also its survival and even its growth.
O presente estudo teve por objetivo analisar impactos da regulamentação estatal na gestão de uma cooperativa médica Unimed do Estado de Minas Gerais. No contexto de Reforma do Estado no Brasil, com a promulgação da Lei n. 9.656, em junho de 1998, foram regulamentadas as atividades das empresas que operam com planos e seguros privados de saúde (ou segmento de assistência médica suplementar) no País. Para realizar este estudo, utilizou-se uma abordagem sistêmica de análise organizacional, que contemplou seis perspectivas, quais sejam, estratégica, estrutural, tecnológica, humana, cultural e política. Foi escolhida, como unidade de análise, uma cooperativa médica Unimed. Esta opção se justificou, particularmente, pelo fato de tal modalidade empresarial estar presente na maioria das regiões e estados do Brasil e ser uma alternativa às organizações do mercado competitivo. O estudo realizado teve um caráter exploratório-descritivo-analítico, sendo adotada uma abordagem de análise qualitativa. Os resultados demostraram que os entrevistados têm consciência das forças ambientais desse novo contexto, às quais a cooperativa está exposta. Relataram que a organização respondeu às mudanças do ambiente de forma relativamente rápida, especialmente, porque uma nova administração, com visão de gestão profissional, havia assumido a direção da cooperativa em abril de 1998. A regulamentação foi, portanto, um impulso para que esta cooperativa médica mudasse radicalmente sua forma de gestão, transformando-se em uma empresa profissionalizada e moderna. Adotou-se o planejamento estratégico como ferramenta gerencial, modificaram-se as estratégias organizacionais, uma nova estrutura foi implementada, inovou-se, profunda e amplamente, no campo tecnológico e transformaram-se as relações com as pessoas. A montagem de uma equipe gerencial altamente qualificada com executivos recrutados no mercado dotou a gestão da cooperativa médica Unimed estudada de racionalidade administrativa, implicando a construção de uma nova cultura. A reestruturação desta organização, impulsionada por demandas provocadas pela regulamentação do setor, está viabilizando não somente sua adaptação a este novo contexto como também a sua sobrevivência e, até mesmo, seu crescimento.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Misal, Nilimb V. Mr. "A Fast Parallel Method of Interleaved Fft for Magnetic Resonance Imaging". University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1164733382.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Hast, Andreas y Lars Johansson. "Fast Factorized Back-Pro jection in an FPGA". Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-280.

Texto completo

Resumen

The Fast Factorized Back Pro jection (FFBP) algorithm is a computationally efficient

algorithm for image formation in a Very High Frequency Synthetic Aperture Radar (VHF

SAR) system. In this report an investigation of the feasibility of using an FPGA with a

hard CPU core to calculate the FFBP in real-time has been done. Two System on a Chip

designs for this task have been proposed for calculating the FFBP. A simplified version of

the FFBP has also been implemented in Matlab and used during this pro ject. The result

is that the computationally intensive parts, such as index generating and interpolation

calculations, should be implemented in the logic part of the FPGA and the CPU should

handle scheduling. This kind of modular system is easy to maintain and upgrade.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Rexhaj, Betim. "Perishable Inventory Management Solutions and Challenges of Kosovo FFRs : Avoiding Product Expiration at Retails Shelves". Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-89496.

Texto completo

Resumen

Title: Perishable Inventory Management Solutions and Challenges of Kosovo FFRs. Avoiding Product Expiration at Retails ShelvesPurpose: In this thesis perishable inventory management solutions and challenges at Kosovo FFRs have been studied and identified. Hence, after identifying PIM solutions and challenges the research suggests ideas that will contribute to avoid the expiration of perishable products if selling them takes more time than their actual shelf life. This contributes to minimizing food waste in food supply chains and fresh food retailers. Methodology: Thesis consist of qualitative methods where multiple case studies in cooperation with Kosovo FFRs have been performed. Data collection methods included semi structured interviews, site visits and some financial data accessed from annual and government reports. Theory: Theoretical chapter has been developed from preexisting theory on perishable inventory management. Five phases of fresh food retailing inventory management have been developed and used as the basis for practical research. Moreover, part two of the theoretical chapter talks about the perishable inventory management challenges and is the basis for the second research question. Findings: The findings have shown that Kosovo FFRs use a mixture of PIM solutions with a focus on shelf life and replenishment solutions. The study also revealed that Kosovo FFRs are outdated regarding to product identification and software solutions, however, manage to perform somehow satisfactorily. Consequently, because of the lack of contemporary identification technologies Kosovo FFRs PIM challenges where found to be related to data accuracy and real time data access.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ebel, Silke. "Zweijahresverlauf der FFR-basierten Therapiestratifizierung bei Patienten mit angiographisch mittelgradigen Stenosen und koronarer Mehrgefäßerkrankung". Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-81385.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ebel, Silke. "Zweijahresverlauf der FFR-basierten Therapiestratifizierung bei Patienten mit angiographisch mittelgradigen Stenosen und koronarer Mehrgefäßerkrankung". kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/8138/.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Libros sobre el tema "FFRP"

Teufel, Karoline, Christian Wilker, Jennifer Valerian y Christine M. Freitag. A-FFIP – Autismusspezifische Therapie im Vorschulalter. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-50500-7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Gori, Tommaso y Massimo Fineschi, eds. Atlas of FFR-Guided Percutaneous Coronary Interventions. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47116-7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Robinson, Philip J. Space station auxiliary thrust chamber technology: Final report 2210-90-FFR. [Cleveland, Ohio]: Lewis Research Center, National Aeronautics and Space Administration, 1990.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Oldertz, Carl. Svensk rättspraxis i försäkrings- och skadeståndsmål: Register över i FFR, RFS, NJA, RfH och SvJT refererade domar. 2^a ed. Stockholm: [Nicator], 1996.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

FFHP Book 1. self, 2016.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

FFRR: Silver on Black. FFRR, 1989.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Commission, Codex Alimentarius y Great Britain. Scottish Office Agriculture and Fisheries Department., eds. Code x Alimentarius Commission: CL 1995/30 FFP. Edinburgh: Scottish Office Agriculture and Fisheries Department, 1995.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Commission, International Electrotechnical y International Organization for Standardization, eds. Software engineering--COSMIC-FFP--a functional size measurement method =: Ingénierie du lociciel--COSMIC-FFP--méthods fonctionnelle de mesure de taille. Geneva, Switzerland: ISO/IEC, 2003.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ltd, ICON Group. FFP MARKETING COMPANY, INC.: Labor Productivity Benchmarks and International Gap Analysis (Labor Productivity Series). 2^a ed. Icon Group International, 2000.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ltd, ICON Group. FFP MARKETING COMPANY, INC.: International Competitive Benchmarks and Financial Gap Analysis (Financial Performance Series). 2^a ed. Icon Group International, 2000.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Capítulos de libros sobre el tema "FFRP"

Ibarra-Castanedo, C., S. Sfarra, D. Paoletti, A. Bendada y X. Maldague. "The Use of Flax Fiber-Reinforced Polymer (FFRP) Composites in the Externally Reinforced Structures for Seismic Retrofitting Monitored by Transient Thermography and Optical Techniques". En Handbook of Composites from Renewable Materials, 137–53. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119441632.ch45.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Gori, Tommaso. "Reproducibility of FFR". En Atlas of FFR-Guided Percutaneous Coronary Interventions, 53–55. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47116-7_10.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Lee, Hyun-Jong y Joon-Hyung Doh. "FFR in Complex Lesions". En Coronary Imaging and Physiology, 269–77. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2787-1_27.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Gori, Tommaso. "FFR in a Bypass". En Atlas of FFR-Guided Percutaneous Coronary Interventions, 201–2. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47116-7_39.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Marik, Paul Ellis. "Coagulopathy and FFP Transfusions". En Handbook of Evidence-Based Critical Care, 543–51. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-5923-2_52.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Teufel, Karoline, Christian Wilker, Jennifer Valerian y Christine M. Freitag. "Frankfurter Frühinterventionsprogramm (A-FFIP) – die Grundlagen". En A-FFIP – Autismusspezifische Therapie im Vorschulalter, 43–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-50500-7_5.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Gori, Tommaso. "The Impact of Venous Pressure on FFR: Do Diuretics Affect FFR?" En Atlas of FFR-Guided Percutaneous Coronary Interventions, 195–96. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47116-7_37.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Salman, Mohammed K., Yahya Abid y Badlishah R. Ahmad. "FFR WiMAX Base Station Deployment". En Mobile WiMAX Systems, 7–28. Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019. | “A CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa plc.”: Chapman and Hall/CRC, 2018. http://dx.doi.org/10.1201/9781351026628-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Yi, Yan, Jingwen Dai y Yining Wang. "Borderline Lesion Evaluation: CT-FFR". En Cardiac CT, 39–43. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5305-9_7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Köhler, M. "Frisch gefrorenes Plasma (FFP): Indikationsrichtlinien". En Transfusionsmedizinische Therapiekonzepte zur Blutkomponentensubstitution, 430–36. Vienna: Springer Vienna, 1994. http://dx.doi.org/10.1007/978-3-7091-9345-7_53.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Actas de conferencias sobre el tema "FFRP"

Ibarra-Castanedo, C., S. Sfarra, D. Paoletti, A. Bendada y X. Maldague. "Nondestructive testing of externally reinforced structures for seismic retrofitting using flax fiber reinforced polymer (FFRP) composites". En SPIE Defense, Security, and Sensing, editado por Gregory R. Stockton y Fred P. Colbert. SPIE, 2013. http://dx.doi.org/10.1117/12.2017875.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Xu, Ming y James Yang. "Contact Pressure Sensitivity Analysis in N95 Filtering Facepiece Respirator With Strap Location, Friction, and Headform Material Property". En ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46465.

Texto completo

Resumen

The contact pressure between an N95 filtering facepiece respirator (FFR) and the human face plays an important role in FFR performance. In this paper, the effects of several important factors (strap locations on headback, friction, and facial soft tissue material property) on contact pressures are studied using validated N95 FFR/headform finite element models. Sixteen different FFR/headform combinations including six FFRs and five digital headforms (small, medium, large, long/narrow, and short/wide) are studied. For each FFR/headform combination, the facial contact pressure distribution is recorded from the finite element results. The maximum contact pressures from six key areas are recorded for sensitivity study. The results show that the strap locations on the headback produce the largest effect on the maximum contact pressure values and the pressure distribution. The friction and the facial soft tissue material property have limited effects on the maximum contact pressure although they can affect the pressure distribution.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Lei, Zhipeng y James Yang. "Computer-Aided Customized Shape Design of an N95 Filtering Facepiece Respirator". En ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13251.

Texto completo

Resumen

A respirator protects its user by sealing the user’s face and filtering hazardous particles from environment. However, faceseal leakages of users-respirators always happen. First, this study investigated a computer-aided technique for designing a well fitted N95 filtering facepiece respirator (FFR) for a subject. The customized N95 FFR includes a customized contact area, a center filtering area, two straps and a nasal clip. Five base contact areas of National Institution for Occupational Safety and Health (NIOSH) headforms were created and the customized contact area was modeled using the mapping relationship between the subject and a NIOSH headform. The center filtering area was designed by considering constraints of N95 FFR shape. Second, this study used simulation-based approaches, including the FE method and computational fluid dynamics (CFD) method, to assess the performance of the customized N95 FFR on the subject. The contact pressure and the faceseal leakage from the subject-customized N95 FFR combination were compared with the results from the subject-existing N95 FFRs combinations. The comparison showed that the customized N95 FFR provided the subject an optimized contact pressure distribution and no faceseal leakage.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Pechstein, Astrid, Daniel Reischl y Johannes Gerstmayr. "The Applicability of the Floating-Frame Based Component Mode Synthesis to High-Speed Rotors". En ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47800.

Texto completo

Resumen

The floating frame of reference formulation (FFRF) together with modal reduction is a standard method in multibody system dynamics. As an advantage of the FFRF, fully nonlinear coupling of small flexible deformations superimposed to arbitrarily large rigid body motion is considered. The idea of the present paper is to apply the FFRF with component mode synthesis to an electromagnetically levitated high-speed rotor, in which large tilting angles may occur, which are not accounted for in classical rotor dynamics. The applicability of FFRF to rotor dynamics, especially close to bending resonance, is not studied in detail in the literature. Thus, fully nonlinear and transient finite element computations are compared to different FFRF-based simulations. In exhaustive numerical studies of a flexible two-disc rotor, comparing FFRF and fully nonlinear transient computations, it is shown that the choice of reference frames and the rotation parameterization influence accuracy of results and CPU-performance.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Xu, Fangmin. "Fractional Frequency Reuse (FFR) and FFR-Based Scheduling in OFDMA Systems". En 2010 International Conference on Multimedia Technology (ICMT). IEEE, 2010. http://dx.doi.org/10.1109/icmult.2010.5629810.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Schrauwen, Jelle T. C., Jolanda J. Wentzel, Anton F. W. van der Steen y Frank J. H. Gijsen. "Fractional Flow Reserve Estimation in Coronary Arteries by Forward Geometrical Modeling". En ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14171.

Texto completo

Resumen

Fractional Flow Reserve (FFR) is an important indicator for the hemodynamic significance of a coronary stenosis [1]. The FFR is defined as the pressure drop over the stenosis under hyperemia. The pressure drop, and thus the FFR, depends on both the geometry and flow. In clinical practice, the FFR is measured with a pressure wire under administration of adenosine and intervention is warranted if the FFR is below 0.8.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Papakonstantinou, Nikolaos, Seppo Sierla, Irem Y. Tumer y David C. Jensen. "Using Fault Propagation Analyses for Early Elimination of Unreliable Design Alternatives of Complex Cyber-Physical Systems". En ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70241.

Texto completo

Resumen

The Functional Failure Identification and Propagation (FFIP) framework has been proposed in prior work to study the reliability of early phase designs of complex systems. For the specified functionality, a model of mechanical, electrical and software components has been defined to support simulation and discovery of fault propagation paths. The advantage of this approach has been the possibility to identify unreliable designs before high cost design commitments have been made. However, a weakness is that the results are specific to the component model that is created for the purpose of running the FFIP simulations; it is unclear how the results would change if different modeling choices would have been made. Further, the usefulness of the method in design has been limited to evaluating reliability rather than actively finding more robust design alternatives. In order to address these weaknesses, the FFIP component model needs to incorporate a capability to describe design alternatives. The feature modeling syntax and semantics, which has been successfully used by software engineers to describe customer variations in product lines, is applied here to specify alternative mechanical, electrical and software features of a cyber-physical system. In the concept phase, all plausible design alternatives are described with a feature model. FFIP analyses can be performed for each valid configuration of this model, and all alternatives that are found unreliable are removed. The result is a restricted feature model, comprising significantly fewer design alternatives, that is delivered as source information for the detailed design phase. A toolchain for performing these analyses is presented, integrating open source feature modeling and configuration tools to the FFIP environment. The methodology is illustrated with a case study from boiling water nuclear reactor design.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Goswami, Ishan, Srikara V. Peelukhana, Marwan Al-Rjoub, Lloyd H. Back y Rupak K. Banerjee. "Influence of Variable Native Arterial Diameter on Fractional Flow Reserve: An In-Vitro Study". En ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80881.

Texto completo

Resumen

Fractional flow reserve (FFR), the ratio of the pressures distal (Pd) and proximal (Pa) to a stenosis, and coronary flow reserve (CFR), the ratio of flows at maximal vasodilation to the resting condition, are widely used for determining the functional severity of a coronary artery stenosis. However, the diameter of the native artery might influence the FFR values. Therefore, using an in-vitro experimental study, we tested the variation of FFR for two arterial diameters, 2.5 mm (N1) and 3 mm (N2). We hypothesize that FFR is not influenced by native arterial diameter. For both N1 and N2, vasodilation-distal perfusion pressure (CFR-Prh) curves were obtained using a 0.35 mm guidewire by simulating physiologic flows under different blockage conditions: mild (64% area stenosis (AS)), intermediate (80% AS) and severe (90% AS). The FFR values for the two arterial models differed insignificantly, within 3%, for mild and intermediate stenoses but differed appreciably for severe stenosis (∼25%). This significant difference in FFR values for severe stenosis can be attributed to relatively larger difference in guidewire obstruction effect at the stenotic throat region of the two native arterial models. These findings confirm that FFR will not differ for the clinically relevant cases of mild and intermediate stenosis for different arterial diameters.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Rotman, Oren, Uri Zaretsky, Avraham Shitzer y Shmuel Einav. "Effect of Arterial Distensibility and Stenoses on Pressure Drop in Pulsatile Flow". En ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80058.

Texto completo

Resumen

The most accepted standard tool of cardiologists for assessing stenoses severity in the coronary tree is coronary angiography. Information from coronary angiography is limited to geometrical data on the coronary lumen, and provides limited functional data on the severity of stenoses. In addition, histopathological studies have demonstrated that angiographic evidence of stenosis is usually detected when the cross-sectional area of a plaque approaches 40% to 50% of the total cross-sectional area of the vessel [1]. Hence, managing the intermediate coronary lesions (40% to 70% diameter stenosis) are a true challenge for cardiologists. These geometrical limitations have led to the development of several hemodynamic parameters, which functionally assess stenoses severity and the cardiovascular tree, among which the most pronounced is Fractional Flow Reserve (FFR), which is defined as the ratio of hyperemic flow in the stenosis artery to the flow in the same artery in the theoretic absence of the stenosis [2]. FFR is lesion specific and provides functional assessment of the stenosis severity by means of pressure measurement as a surrogate for flow. Under hyperemic flow conditions, FFR can be calculated as the ratio of pressures distal and proximal to a lesion. FFR values of 0.75–0.80 have been established as threshold values that distinguish normal from abnormal levels for a given measurement. Stenoses with an FFR < 0.75 are considered as a cause of myocardial ischemia, whereas stenoses with an FFR > 0.80 are considered to be ischemic ‘safe’ [2]. One of the limitations of FFR is its absolute dependency in pharmacologically-induced maximal hyperemia. The current clinical standard for coronary hyperemia is the intracoronary administration of ademosine, however in 10% to 15% of patients, intracoronary adenosine induces submaximal hyperemia only, and therefore FFR may be overestimated by up to 0.10 [3, 4].

Los estilos APA, Harvard, Vancouver, ISO, etc.

Peelukhana, Srikara Viswanath, Rupak K. Banerjee, Mohamed A. Effat y Tarek Helmy. "Misinterpretation of Functional Severity of Coronary Stenosis in the Presence of Collateral Flow". En ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-193034.

Texto completo

Resumen

Angiography is widely used diagnostic method to find the ischemic severity. However, it is limited in its capacity in determining the functional severity of the stenosis [1]. Hence, a functional diagnostic parameter Fractional Flow Reserve (FFR), defined as the ratio of distal pressure to the proximal pressure at maximum vasodilation [2], at the site of the stenosis, was developed to assess the functional severity of the stenosis. Pijls et al [3], established a threshold value of 0.75 for FFR, based on which coronary intervention decisions are taken. If FFR is below 0.75, a percutaneous coronary intervention is recommended. FFR is calculated during cardiac catheterization by measuring the pressure values across the stenosis. However, the value of FFR measured during cardiac catheterization doesn’t account for the increase in pressure values downstream of stenosis, due to other resistances in coronary circuit, e.g., abnormal microvasculature and functional collaterals, as it cannot delineate the effect of downstream collateral flow or the presence of myocardial diseases.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Informes sobre el tema "FFRP"

L. Zakharov, J. Li and Y. Wu. Fusion-Fission Research Facility (FFRF) as a Practical Step Toward Hybrids. Office of Scientific and Technical Information (OSTI), noviembre de 2010. http://dx.doi.org/10.2172/1001662.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Leonid E. Zakharov. Basics of Fusion-Fissison Research Facility (FFRF) as a Fusion Neutron Source. Office of Scientific and Technical Information (OSTI), junio de 2011. http://dx.doi.org/10.2172/1025017.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Jezierski, Kelly, Andrew Tadd, Johannes Schwank, Roland Kibler, David McLean, Mahesh Samineni, Ryan Smith et al. FEEDSTOCK-FLEXIBLE REFORMER SYSTEM (FFRS) FOR SOLID OXIDE FUEL CELL (SOFC)- QUALITY SYNGAS. Office of Scientific and Technical Information (OSTI), julio de 2010. http://dx.doi.org/10.2172/1027508.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Bucholtz, Frank, Mark Seaver y Michael D. Todd. Comparison of the Frequency Response and Voltage Tuning Characteristics of a FFP and a MEMS Fiber Optic Tunable Filter. Fort Belvoir, VA: Defense Technical Information Center, mayo de 2004. http://dx.doi.org/10.21236/ada423385.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Driscoll, F. FFP/NREL Collaboration on Hydrokinetic River Turbine Testing: Cooperative Research and Development Final Report, CRADA Number CRD-12-00473. Office of Scientific and Technical Information (OSTI), abril de 2013. http://dx.doi.org/10.2172/1076621.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Understanding filtration efficiency testing and fit testing in filtering facepiece respirators (FFRs). U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, septiembre de 2021. http://dx.doi.org/10.26616/nioshpub2021123.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!