Bibliografías temáticas / Reverse Cyclic

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Literatura académica sobre el tema "Reverse Cyclic"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 4 de febrero de 2022

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Artículos de revistas sobre el tema "Reverse Cyclic"

Dienhart, Mary K. y Stephen M. Downs. "Cyclic AMP reversal of hypoxanthine-arrested preimplantation mouse embryos is EDTA-dependent". Zygote 4, n.º 2 (mayo de 1996): 129–37. http://dx.doi.org/10.1017/s0967199400003002.

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SummaryHypoxanthine can block preimplantation mouse embryo development in vitro at the 2- to 4-cell stages, and this has recently been shown to be reversed by cAMP-elevating agents. However, the extent of this hypoxanthine-induced arrest is determined by the culture conditions and strain of mouse. Whitten's and KSOM/AA are two embryo culture media that support preimplantation development to the blastocyst stage. This study was undertaken to examine the influence of several components in these media on hypoxanthine-arrested preimplantation mouse embryos and to test the hypothesis that reversal of the hypoxanthine block by cAMP-elevating agents requires cooperative interaction with the chelator, EDTA. Initial experiments demonstrated that embryo development was blocked in the presence of hypoxanthine in Whitten's medium but not in KSOM/AA; furthermore, removal of EDTA from KSOM/AA rendered this medium incapable of supporting high levels of development to blastocyst (9%), whereas high numbers of blastocysts (80%) formed in Whitten's medium, which does not contain the chelator. Consequently, Whitten's medium was used to test our hypothesis. It has previously been demonstrated that the phosphodiesterase inhibitor, IBMX, can reverse the developmental arrest imposed by hypoxanthine in EDTA-supplemented Earle's basic salt solution, but in the present study the addition of IBMX to Whitten's medium resulted in a block to development and failed to reverse the hypoxanthine arrest. These disparate effects can be explained by the presence or absence of EDTA. Supplementing Whitten's medium with EDTA reverses the IBMX effect, but not the hypoxanthine-induced block. While IBMX alone is unable to reverse the hypoxanthine block in Whitten's medium, development is greatly enhanced by the simultaneous addition of EDTA and IBMX. Similar results were obtained with the cAMP analogue, 8-AHA-cAMP. The data therefore support our hypothesis that the reversal of the hypoxanthine-induced arrest by cAMP-elevating agents is critically dependent on the presence of EDTA. We contrast this with the situation in mouse oocytes, where the hypoxanthine-induced meiotic arrest is not reversed by the addition of EDTA and/or cAMP-elevating agents.

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PUCK, THEODORE T., PATRICIA WEBB y ROBERT JOHNSON. "Cyclic AMP and the Reverse Transformation Reaction". Annals of the New York Academy of Sciences 968, n.º 1 (junio de 2002): 122–38. http://dx.doi.org/10.1111/j.1749-6632.2002.tb04331.x.

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Dertli, Abdullah y Yasemin Cengellenmis. "On cyclic DNA codes over the rings Z4 + wZ4 and Z4 + wZ4 + vZ4 + wvZ4". BIOMATH 6, n.º 2 (22 de diciembre de 2017): 1712167. http://dx.doi.org/10.11145/j.biomath.2017.12.167.

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The structures of cyclic DNA codes of odd length over the finite rings R = Z4 + wZ4, w^2 = 2 and S = Z4 + wZ4 + vZ4 + wvZ4; w^2 = 2; v^2 =v; wv = vw are studied. The links between the elements of the rings R, S and 16 and 256 codons are established, respectively. The cyclic codes of odd length over the finite ring R satisfy reverse complement constraint and the cyclic codes of odd length over the finite ring S satisfy reverse constraint and reverse complement constraint are studied. The binary images of the cyclic DNA codes over the finite rings R and S are determined. Moreover, a family of DNA skew cyclic codes over R is constructed, its property of being reverse complement is studied.

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O'Grady, S. M., H. R. DeJonge, A. B. Vaandrager y M. Field. "Cyclic nucleotide-dependent protein kinase inhibition by H-8: effects on ion transport". American Journal of Physiology-Cell Physiology 254, n.º 1 (1 de enero de 1988): C115—C121. http://dx.doi.org/10.1152/ajpcell.1988.254.1.c115.

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We explored the potential role of cyclic nucleotide-dependent protein phosphorylation in regulating ion transport across flounder intestinal mucosa by studying the effects of N-[2(methylamino)-ethyl]-s-isoquinolinesulfonamide (H-8), a selective inhibitor of cyclic nucleotide-dependent protein kinase in vitro. Addition of H-8 reversed the inhibitory effects of 8-bromoguanosine 3',5'-cyclic-monophosphate (8-BrcGMP), 8-bromoadenosine 3',5'-cyclic monophosphate (8-BrcAMP), atriopeptin III (AP III), and vasoactive intestinal peptide (VIP) on the short-circuit current (Isc) and transepithelial potential difference (PD). Flux measurements established that these changes in Isc and PD directly reflected changes in Na and Cl absorption by the intestine. H-8 was unable, however, to reverse the inhibitory effects on Isc and PD of the Ca ionophore ionomycin and of substance P at dosages exceeding those needed to reverse the effects of AP III, VIP, and the cyclic nucleotides. We conclude that 1) H-8 (100 microM or less) does not exert toxic effects, 2) exogenously added cyclic nucleotide analogues inhibit ion transport through activation of cyclic nucleotide-dependent kinases resulting in protein phosphorylation, 3) activation of these kinases is an essential intermediate step in the inhibitory action of AP III and VIP on ion transport, and 4) the Ca ionophore ionomycin and substance P appear to inhibit ion transport by a mechanism that is independent of cyclic nucleotide-dependent protein phosphorylation.

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Zhao, Zuo Zhou, Qin Zhi Liu y Jia Ru Qian. "Performance of Cross Bracings under Reverse Cyclic Loading". Advanced Materials Research 250-253 (mayo de 2011): 1774–80. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1774.

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Steel braces are widely used in seismic retrofit of buildings. However, their tendency of buckling under compression impairs their efficacy. In this paper, characteristics of a cross bracing with rigid intersection, including its bearing capacity, hysteretic property and fracture ductility are investigated. With the analysis results, performance-based design requirements of a steel cross bracing are proposed based on its width-thickness ratio and effective slenderness ratio.

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LIANG, Haihua y Lina PAN. "Method of fast cyclic redundancy check reverse decoding". Journal of Computer Applications 33, n.º 7 (31 de octubre de 2013): 1833–35. http://dx.doi.org/10.3724/sp.j.1087.2013.01833.

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Belvisi, Laura, Andrea Caporale, Matteo Colombo, Leonardo Manzoni, Donatella Potenza, Carlo Scolastico, Massimo Castorina, Matilde Cati, Giuseppe Giannini y Claudio Pisano. "Cyclic RGD Peptides Containing Azabicycloalkane Reverse-Turn Mimics". Helvetica Chimica Acta 85, n.º 12 (diciembre de 2002): 4353–68. http://dx.doi.org/10.1002/hlca.200290017.

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Eccles, Gordon N. y William C. Purdy. "Pulse cyclic voltammetry. II. Flowing solutions". Canadian Journal of Chemistry 65, n.º 8 (1 de agosto de 1987): 1795–99. http://dx.doi.org/10.1139/v87-301.

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By the use of pulse cyclic chronovoltammetry, better analytical data are sometimes obtained during the reverse scans. This is demonstrated by a chronovoltammetric FIA study of the quinone–hydroquinone couple. A quantitative FIA pulse cyclic chronovoltammetric investigation of the ferri–ferrocyanide reversible couple showed linearity for time-integrated fourier-smoothed data for reduction scan currents as well as the total of the forward and reverse scan peak currents. The detection limit was found to be 2 × 10−6 M.

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Khimenko, P. L., T. M. Moore, L. W. Hill, P. S. Wilson, S. Coleman, A. Rizzo y A. E. Taylor. "Adenosine A2 receptors reverse ischemia-reperfusion lung injury independent of beta-receptors". Journal of Applied Physiology 78, n.º 3 (1 de marzo de 1995): 990–96. http://dx.doi.org/10.1152/jappl.1995.78.3.990.

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To evaluate the adenosine systems ability to reverse the endothelial damage produced by ischemia and reperfusion (I/R), we studied several different selective adenosine-receptor agonists and antagonists, a protein kinase A inhibitor, and a beta-adrenoreceptor antagonist in isolated buffer-perfused rat lungs. I/R (45 min/105 min) produced a sixfold increase in endothelial permeability as measured by the capillary filtration coefficient. Both a selective A2-receptor agonist (CGS-21680, 300 nM) and a beta-receptor agonist (isoproterenol, 10 microM) reversed the increased microvascular permeability. A nonselective adenosine-receptor antagonist (SPT, 20 microM) and a selective A1-receptor antagonist (DPCPX, 10 nM) had no effect on increased microvascular permeability. Also, isoproterenol and CGS-21680 reversed the damage being introduced after a selective A1-receptor agonist (CCPA, 100 nM). The nonspecific adenosine A1- and A2-receptor agonist NECA (12 nM) appeared to desensitize the A2 receptors and a protein kinase A inhibitor, adenosine-3′,5′-cyclic monophosphothioate (Rp-cAMPS, 100 microM), blocked the reversal of endothelial damage by isoproterenol or A2-receptor agonist. Propranolol (100 microM) blocked the effect of isoproterenol but not the effect of CGS-21680. From this study we conclude that A2-receptor activation reverses endothelial damage associated with I/R by a mechanism independent of beta-receptors or Gi protein. However, a protein kinase A-3′,5′,-cyclic adenosine monophosphate pathway is activated by both the adenosine systems and beta-receptor activation.

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Yu, Ming-xin, Lin Wang, Jia-huan Yu y Nan Yang. "Research on seismic properties of steel reinforced PP ECC column". E3S Web of Conferences 136 (2019): 04052. http://dx.doi.org/10.1051/e3sconf/201913604052.

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The mechanical property of steel reinforced PP ECC columns under reverse cyclic load is investigated and results are presented in this paper. The influence of reinforcement ratio, curing age and volume fraction of PP fiber on load bearing capacity, energy dissipation and stiffness degradation is investigated. The results highlighted the positive contribution of PP ECC to enhance strength and energy dissipation capacity which is important to evaluate the performance of structures subjected to reverse cyclic loads. According to the experimental study on mechanical behavior of steel reinforced PP ECC columns under reverse cyclic loading, the formula of model parameters related to reinforcement ratio are proposed，it is founded that the restoring force model established is of a certain degree of adaptability.

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Tesis sobre el tema "Reverse Cyclic"

Porter, Craig Thomas. "Computational modelling of cyclic peptides incorporating reverse turn peptidomimetics". Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243122.

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Closen, Max. "Self-tapping screw assemblies under monotonic and reverse cyclic load". Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42780.

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In the past century old-growth forests in Canada and the USA provided sufficiently large, clear wooden construction material which have been extensively used. Today, the importance of high-quality structural timber and wood products has increased by far. This increase in demand for high-quality timber and wood products can only be satisfied with second-growth wood, some remaining old-growth forests, and of course engineered wood products. The performance of these materials in structures is, however, largely influenced by the capacity of connections. The envelope in timber construction can only be pushed forward if research on mechanical fasteners and connections that are strong, reliable and cost efficient is conducted. Primary focus of research must address the inherent tensile and shear weaknesses of wood perpendicular and parallel to the wood grain. The thesis presented here experimentally investigates the performance of newly evolved structural self-tapping full thread wood screws as a primary fastener in Canadian Douglas-fir glulam and Cross-Laminated-Timber. The screws as primary fasteners were investigated in a commonly used shear connection and a recently developed moment resisting assembly under reverse cyclic load. Both connection systems utilize the high withdrawal resistance and tensile strength of the fastener with inclined (screw-in angles between 30° and 45°) arrangements. The inclined arrangement allows force transfer along the fastener axis and therefore reduces perpendicular to grain splitting and parallel to grain shear failure and provides high connection capacities and stiffness. The results show that structural self-tapping wood screws can effectively be used as primary connector under reverse cyclic loading conditions. In addition to the screw’s superior withdrawal resistance and tensile strength the research showed that self-tapping screws can be applied efficiently with commonly available machinery and tools.

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Aghniaey, Nima. "Behaviour of Self Consolidating Steel Fiber Reinforced Concrete Beams Under Reversed Cyclic Loading". Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23785.

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Concrete is a very weak and brittle material in tension. It has been shown in previous researches that the addition of steel fibers to a concrete matrix can improve this behavior. The ability of fibers to control and redistribute stresses after cracking results in a number of improvements in the structural behaviour of concrete. A review of existing literature shows that the addition of steel fibers enhances concrete’s tensile resistance, crack control properties, ductility and damage tolerance. In beams, fibers can transform brittle shear response into a flexural response and promote ductility, thereby allowing for a full or partial replacement of traditional shear reinforcement. The enhanced shear capacity, ductility and damage tolerance of Steel Fiber Reinforced Concrete (SFRC) can also potentially be used to relax seismic detailing requirements in frames by partially replacing the required transverse reinforcement in the plastic hinge regions of RC beams. One of the drawbacks associated with SFRC is that the addition of steel fibers to a traditional concrete mix at high fiber contents can result in workability problems. The combined use of Self-Consolidating Concrete (SCC) and fibers can solve this problem and facilitate placement for a wider range of structural applications. Although several studies have been conducted on the behaviour of SFRC beams subjected to monotonic loading, there is limited research on the behaviour of SFRC beams under cyclic or reverse-cyclic loading. This thesis presents the results of an experimental and analytical study conducted on nine SFRC beam specimens tested under load reversals. The main objective of this research program was to investigate the effect of fibers on structural behaviour and to examine the ability of steel fibers to replace transverse reinforcement. The experimental and analytical results show that use of fibers results in several improvements in behaviour, including enhanced damage tolerance and post-peak ductility. The results also show that steel fibers can potentially be used to allow for a reduction of transverse reinforcement in beams, however further research is required.

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Graham, Drew Abram. "Performance of log shear walls and lag screw connections subjected to monotonic and reverse-cyclic loading". Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Spring2007/d%5Fgraham%5F030607.pdf.

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Albright, Dustin Graham. "The Effects of Bolt Spacing on the Performance of Single-Shear Timber Connections Under Reverse-Cyclic Loading". Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34324.

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Much previous experimentation related to wood structures has employed monotonic loading to replicate static situations. However, instances of natural hazards have raised interest in the response of structural connections to dynamic loads. This increased interest led the Consortium of Universities for Research in Earthquake Engineering (CUREE) to develop a testing protocol for reverse-cyclic loading, which involves cycling loads through zero in order to test specimens in both tension and compression. With the CUREE testing protocol in place, recent research has been devoted to understanding the effects of reverse-cyclic loading on multiple-fastener connections. Experimentation by Heine (2001), Anderson (2002), Billings (2004) and others contributed to a better understanding of bolted connection behavior under reverse-cyclic loading. However, some questions remained. Billings was unable to consistently produce yield modes III and IV, meaning that her suggested bolt spacing of seven times the bolt diameter (7D) could not be applied to connections subject to these yield modes without further testing. In addition, the work of Anderson and Billings raised questions regarding the proper measurement of bending yield strength in bolts and the relationship between the bending yield strength and the tensile yield strength. These topics are each addressed by this project and thesis report. Results of the connection testing presented in this report can be used in conjunction with the work of Anderson and Billings to critically evaluate the 4D between-bolt spacing recommended by the National Design Specification (NDS) for Wood Construction (AF&PA, 2001). Results of the bolt testing provide a supplement to the search for a reliable method for the measurement of bending yield strength in bolts.
Master of Science

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Knudson, Caleb Jesse. "Investigation into the effects of variable row spacing in bolted timber connections subjected to reverse cyclic loading". Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/c_knudson_110906.pdf.

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Ntshongontshi, Nomaphelo. "Cytochrome P450-3A4/copper-poly(propylene imine)- polypyrrole star co-polymer Nanobiosensor system for delavirdine – a non-nucleoside reverse transcriptase inhibitor HIV drug". University of the Western Cape, 2014. http://hdl.handle.net/11394/4446.

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>Magister Scientiae - MSc
HIV and AIDS are among the world's pandemics that pose serious concern to almost every individual in the world. With the current level of availability of anti-retroviral (ARV) drugs and the ease of accessibility of treatment in many countries such as South Africa, the disease can be controlled by suppressing the viral load of an infected individual. These anti HIV drugs such as delavirdine are metabolised by enzymes which are found in the liver microsomes, particularly those of the cytochrome P450 family. Due to the fact that the metabolic rate of a patient determines the effect of the drug, the drug could either have a beneficial or an adverse effect once it is administered. It is therefore imperative that the metabolic profile of a patient is determined at point-of-care is necessary for proper dosing of the ARV drugs. In this project a nanobiosensor system was devised and used for the determination of the metabolism of delavirdine, a non-nucleoside reverse transcriptase inhibitor (NNRTI) ARV drug. The nanobiosensor was prepared by the entrapment of the isoenzyme CYP3A4 into a pre-formed electro active carrier matrice consisting of a dendrimeric copper generation-2 poly (propylene imine)-co-polypyrrole star copolymer (Cu(G2PPI)-co-PPy). The metallo-dendrimer was used as a host for the enzyme and provided thenecessary bio-compatible environment that allowed the direct transfer of electrons between the enzyme's active centres and platinum electrode surface. Copper was the choice of metal used in the study due to its properties. Copper is a malleable, ductile and a good conductor of both heat and electricity. It is a better conductor than most metals. Silver which also belongs to group 1b in the periodic table is a better electrical conductor than copper but copper has better corrosion resistance and is a more abundant and hence it is a cheaper material to use. Cu(G2PPI)-co-PPy was prepared by the incorporation of the copper metal into the G2PPI and the electropolymerization of pyrrole onto the Cu(G2PPI). The incorporation of Cu into G2PPI was determined by FTIR which did not show the presence of the Cu but showed an increase in the intensities of the peaks after the incorporation. The surface morphology of Cu (G2PPI) was confirmed by the use of HRSEM which showed a difference in the surface morphology of the dendrimer moiety with the addition of the copper metal. The HRSEM images after Cu incorporation resulted in the change from rough surface to smooth surface with open cavities which were essential for the entrapment of the biological systems (CYP3A4). Energy dispersive spectrometry (EDS) and HRTEM were used to confirm the presence of spherically shaped copper nanoparticles in the Cu (G2PPI) and were found to have a size distribution of 12-17 nm with an average particle size of 15nm. The star copolymer (Cu(G2PPI)-co-PPy) was characterised using cyclic voltammetrywhere it was confirmed that the material was electroactive and conducting due to electron movement along the polymer chain. A diffusion co-efficient (D₀) value of 8.64 x 10⁻⁵ cm²/s was determined for the material indicating a slow electron transfer kinetics within the diffusion layer. The constructed nanobiosensor was developed using copper poly (propylene imine) – polypyrrole star copolymer, bovine serum albumin and glutaraldehyde coupled to the enzyme CYP3A4. The resultant nanobiosensor parameters include a dynamic linear range (DLR) of 0.01-0.06 nM, a limit of detection (LOD) of 0.025 nM and a sensitivity value of0.379 μA/nM.

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Billings, Mary Anna. "Investigation of the Effects of Spacing between Bolts in a Row in a Single-Shear Timber Connection Subjected to Reverse Cyclic Loading". Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/35757.

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This thesis presents the results of testing to determine if spacing between bolts in a multiple-bolt, single-shear connection subjected to natural hazard loading affects seven strength and serviceability parameters: maximum load, failure load, E.E.P. yield load, 5% offset load, elastic stiffness, E.E.P. energy, and ductility ratio. This research also determines if a statistical difference exists between previously published research for 4D spacing as compared to results produced by this research for five alternate spacings: 8D, 7D, 6D, 5D, and 3D. Finally, this research determines which of the spacings examined: 8D, 7D, 6D, 5D, 3D; produced the most optimal results for each examined strength and serviceability parameter where optimization is based on economy and performance.

Three connection configurations with five different spacings between bolts were subjected to reverse cyclic loading for a total of one hundred and fifty tests. The reverse cyclic protocol was based on recommendations by the Consortium of Universities for Research in Earthquake Engineering (CUREE) for testing woodframe structures. The same connection configurations were also subjected to monotonic loading for an additional forty-five tests.

Results of this research can be used to evaluate the current design recommendation presented in the National Design Specification (NDS) for Wood Construction (AF&PA, 2001) of spacing bolts at four times the bolt diameter (4D) to determine if a different spacing should be recommended for natural hazard loading conditions.

Master of Science

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Mulla, Salah. "Effect of Cyclic Loading on Screw Joint Stability of Implants with Angled Screw Channel Crowns". The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1593090425010651.

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Marcus, Adam Wade. "New combinatorial techniques for nonlinear orders". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24685.

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Thesis (Ph.D.)--Mathematics, Georgia Institute of Technology, 2008.
Committee Chair: Prasad Tetali; Committee Member: Dana Randall; Committee Member: Robin Thomas; Committee Member: Vijay Vazirani; Committee Member: William T. Trotter

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Libros sobre el tema "Reverse Cyclic"

Monteleone, Vince. Headed shear reinforcement in shell elements under reversed cyclic loading. Ottawa: National Library of Canada, 1993.

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Stock, James R. Reverse logistics: White paper. Oak Brook, IL (2803 Butterfield Road, Oak Brook 60521): Council of Logistics Management, 1992.

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Davis, Nadinia A. Revenue cycle management best practices. Chicago, Ill: AHIMA Press, 2011.

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Lawrie, Robin. Sweet revenge. Minneapolis: Stone Arch Books, 2008.

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Stock, James R. Development and implementation of reverse logistics programs. [Oak Brook, IL (2803 Butterfield Road, Oak Brook 60521)?]: Council of Logistics Management, 1992.

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Stock, James R. Development and implementation of reverse logistics programs. [Oak Brook, IL (2803 Butterfield Road, Oak Brook 60521)?]: Council of Logistics Management, 1998.

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Backman, Jari. On the reversed Brayton cycle with high speed machinery / Jari Backman. Lappeenranta, Finland: Lappeenranta University of Technology, 1996.

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The new avengers: Feminism, femininity, and the rape-revenge cycle. Manchester: Manchester University Press, 2000.

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Read, Jacinda. Narratives of transformation: Feminism, femininity and the rape-revenge cycle. [s.l.]: typescript, 1998.

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M, Koenig Kurt, ed. ROI selling: Increasing revenue, profit, & customer loyalty through the 360 degree sales cycle. Chicago: Dearborn Trade Pub., 2004.

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Capítulos de libros sobre el tema "Reverse Cyclic"

Hannemose, Morten, Janus Nørtoft Jensen, Gudmundur Einarsson, Jakob Wilm, Anders Bjorholm Dahl y Jeppe Revall Frisvad. "Video Frame Interpolation via Cyclic Fine-Tuning and Asymmetric Reverse Flow". En Image Analysis, 311–23. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20205-7_26.

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Ganesan, N., P. V. Indira y P. Seena. "Reverse Cyclic Tests on High Performance Cement Concrete Shear Walls with Barbells". En Advances in Structural Engineering, 2309–21. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2187-6_175.

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Spoto, Giuseppe, Sandro Berardi, Giuseppe Ajerba y Vittorio De Laurentiis. "A Reverse-Phase HPLC Method for Cyclic Nucleotide Phosphodiesterases Activity and Classification". En Purine and Pyrimidine Metabolism in Man VIII, 815–20. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2584-4_171.

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Vogel, G. "Purification of 125Iodine-Labeled Tyrosylated Human Parathyroid Hormone Fragment (Residues 44–68), Optimized by Reverse-Phase High-Performance Liquid Chromatography". En Calcium Regulating Hormones, Vitamin D Metabolites, and Cyclic AMP Assays and Their Clinical Application, 116–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-662-00406-7_9.

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Halpern, Paul. "Reverse Performance". En The Cyclical Serpent, 221–46. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-6036-8_10.

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Lun, Y. H. Venus y S. L. Dennis Tung. "Reverse Cycle". En Heat Pumps for Sustainable Heating and Cooling, 111–24. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31387-6_8.

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Callender, Jassen. "Vitruvian Cycles 1". En Architecture History and Theory in Reverse, 202–10. New York : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315661315-21.

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Callender, Jassen. "Vitruvian Cycles 2". En Architecture History and Theory in Reverse, 211–22. New York : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315661315-22.

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Bucci, Ronald V. "Revenue Cycle". En Medicine and Business, 21–33. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04060-8_3.

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Burhenne, Heike y Volkhard Kaever. "Quantification of Cyclic Dinucleotides by Reversed-Phase LC-MS/MS". En Cyclic Nucleotide Signaling in Plants, 27–37. Totowa, NJ: Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-441-8_3.

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Actas de conferencias sobre el tema "Reverse Cyclic"

Adkins, Richard C. y Mike Sherwood. "Thrust Reverser Catchers: Devices Which Enable Cyclic Testing Between Forward and Reverse Thrust". En ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-085.

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Cyclic operation of engines between forward and reverse thrust configurations is a requirement of testing for Extended Twin Operations (ETOPS) certification. When these tests are conducted inside enclosed test cells it is then necessary to redirect the exhaust gases in order to return them to the cell exhaust ducting. This is done by specially designed catcher ducts which have undergone many years of development, due to the complicated nature of the flow. The paper discusses the features that have eventually made these devices successful and as such is intended as an aid to design.

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Chatziioannou, Konstantinos, Yuner Huang y Spyros A. Karamanos. "Dented Externally-Pressurised Pipes Subjected to Cyclic Axial Loading". En ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95814.

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Abstract The present paper describes a numerical investigation of the mechanical response of externally-pressurized dented stainless-steel pipes, subjected to reverse cyclic axial loading. This is the first part of a large-scale project, between The University of Edinburgh and Tianjin University, and is motivated by the mechanical response of offshore pipelines, which are often subjected to cyclic loading during installation or operation. Under those cyclic loading conditions, the pipe may collapse because of accumulation of plastic deformations at the dent area. The paper describes a numerical simulation of the above physical problem, in an attempt to support experiments on 50mm-diameter stainless steel pipes, which are being performed at the laboratory facilities of Tianjin University. Pipe segments are subjected to reverse cyclic axial loading (tension and compression), in the presence of external pressure. Prior to the application of external pressure and axial load, the pipes are locally dented, in the form of “smooth dent” or “local ovalization”, so that collapse initiates at the dent area. The numerical simulation is aimed at examining some aspects of pipeline behavior to support and complement the experimental observations. The simulation is conducted using rigorous finite element tools, which account for large displacement and nonlinear material. Towards this purpose, an advanced material model is employed, capable of describing the phenomenological aspects of material response under cyclic loading, such as the accumulation of plastic strain and ratcheting. In the first part of the analysis, the local ovalization (denting) process is simulated. Subsequently, the pipes are subjected to uniform constant external pressure and, keeping the pressure level constant, monotonic or cyclic axial loading is applied until collapse. The numerical results are aimed at identifying the interrelation between the magnitude of the applied loading and the number of loading cycles to failure. The results are presented in diagrams of axial displacement, ovalization and local strain versus the corresponding number of cycles to failure, for specific levels of external pressure.

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Cho, Nak-Kyun y Haofeng Chen. "Cyclic Plasticity Behavior of 90° Back-to-Back Pipe Bends Under Cyclic Bending and Steady Pressure". En 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82386.

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Back-to-back pipe bends are widely adopted applications in many industries including nuclear sectors. Evaluation of their load bearing capability under complex cyclic loading is very important. Recently, a couple of research reported shakedown boundary of a 90° back-to-back pipe bends by adopting a conservative approach but no comprehensive post yield structural behaviors have been dealt with. In this research the concerning pipe bends subjected to cyclic opening in-plane (IP)/out-of-plane (OP) bending and steady internal pressures are analyzed to construct shakedown and ratchet limit boundary by means of the Linear Matching Method. Analyzed results present that the concerning pipe bends under out-of-plane bending has higher resistance to cyclic bending than under in-plane bending. In additions, the out-of-plane bending causes very small alternating plasticity areas, unlike the in-plane bending. Full cyclic incremental analyses known as step-by-step analysis are performed to verify the structural responses either side of each boundary and confirm correct responses. Parametric studies are carried out with respect to changes in geometry of the concerning pipe bends subjected to the same loading, and semi-empirical equations are derived from relationships of the reverse plasticity limit and the limit pressure with the bend characteristic. This paper offers broad understandings of structural responses of the 90° back-to-back pipe bends under the complex cyclic loading as well as providing key points to be considered for the life assessment of the piping system.

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Chen, Haofeng y Alan R. S. Ponter. "Plastic and Creep Analyses of the Superheater Header Tubeplate Using Linear Matching Method". En ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2755.

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In 2003 ASME PVP conference, a series of numerical procedures for integrity assessment based upon recently developed Linear Matching Method were presented [1]. A typical example of holed plate was used to verify these procedures for the evaluation of plastic and creep behaviours of complex geometry components based on linear solutions, which can be easily implemented into the commercial FE code ABAQUS through user subroutines. In this paper, a more complex 3D tubeplate in a typical AGR superheater header is analysed for the shakedown limit, reverse plasticity, ratchet limit and creep relaxation based on application of the Linear Matching Method. Both the perfectly plastic model and the cyclic hardening model are adopted for the evaluation of the plastic strain range. For the evaluation of accumulated creep strains, flow stresses and elastic follow-up factors with differing dwell times at the steady cyclic state, a creep-reverse plasticity model is adopted. The total inelastic strain range over the cycle at the steady cyclic state is calculated. By comparing these results with ABAQUS step-by-step inelastic analyses, the applicability of the methods is verified.

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Hiremath, Nandeesh, Dhwanil Shukla, Zujia Huang y Narayanan Komerath. "Pressure Fields Around a Rotor Blade in Reverse Flow". En ASME 2016 Fluids Engineering Division Summer Meeting collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fedsm2016-7685.

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The flowfield and pressure distribution of a rotor blade in reverse flow is studied using stereoscopic particle image velocimetry. The 2-bladed teetering rotor with rigid NACA0013 untwisted untapered blades, with manually set collective and cyclic pitch, is operated at advance ratios from 0.7 to 1.0. Results are presented from azimuths 240 and 270 degrees, where the velocity field in chordwise sectional planes at two radial stations are analyzed, at two advance ratios. The paper is focused on two aspects. First is calculation of the total circulation around each blade section, and around the strong sharp-edge vortex seen below the blade in these sections. The second is the surface and flowfield pressures derived from the 3-component velocity field obtained from closely-spaced planes, after interpolation to satisfy the mass continuity equation. The pressure extraction technique is being developed using a yawed-cylinder test case, and shows good success in satisfying continuity between data planes.

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Rakhshan Pouri, Samaneh y Supathorn Phongikaroon. "Graphical User Interface With Reverse-Engineering of the Cyclic Voltammetry Method for Electrochemical Processes of Used Nuclear Fuel". En 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60439.

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This work focuses on an interactive reverse-engineering program design for the cyclic voltammetry (CV) method to help elucidating, improving, and providing robustness in detection analysis in the absence of complete experimental data sets during an electrorefining process of used nuclear fuel reprocessing. The work has been implemented into a Graphical User Interface (GUI) of the commercial software MATLAB allowing an individual user to directly control and make adjustments to support material detection and accountability. Analyzing and reconstructing the CV plots for uranium (U) in a LiCl-KCl molten salt at 500°C under different scan rates and at 1, 2.5, 5, 7.5, and 10 wt% have been accomplished. These test values provide the current (amp) versus potential (V) and concentration of each species (mol/cm3) versus the operating time (s) graphs under different specified conditions. The computational code uses the electrochemical fundamentals coupling with various experimental values existing in the literature such as the diffusion coefficients, formal potentials, reversible/irreversible time duration for reverse engineering of the CV technique. The user needs to specify only the desired concentration of uranium and the scan rate. All other experimental data sets for each condition have been stored in the code and can be used to interpolate between the existence data. The developed routine can be used to detect the peaks at the reversible and irreversible parts despite deficiencies of experimental data in a very short run time (around one minute) with an adequate selected time interval of approximately 0.08 second. Results indicate that the model can trace the current versus potential graph with a low root-meant-square (RMS) error compared to the experimental reported in literature. The concentration of each species at the reversible and irreversible of anodic and cathodic sides can be calculated and are shown based on increasing time which provided a good view of the whole process.

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Chen, Haofeng y Alan R. S. Ponter. "Methods for the Evaluation of Creep Relaxation and the Amplitude of Reverse Plastic Strain for Bodies Subjected to Cyclic Loading". En ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1941.

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An extension of the upper bound shakedown theorem to load histories in excess of shakedown has been applied in previous papers [1, 2] to the evaluation of a ratchet limit and the varying plastic strain magnitudes associated with a varying residual stress field by the Linear Matching Method. In the present paper, this technique is further applied to the evaluation of creep-reverse plasticity mechanism for bodies subjected to cyclic loading including creep effects. The accumulated creep strain, the varying flow stress and the corresponding varying residual stress field during a creep dwell time are evaluated. The elastic follow-up factors are calculated thereafter. In order to verify the applicability of the proposed method, a monotonic creep computation method based upon the rapid cycle solutions is introduced for comparison. A holed plate subjected to cyclic thermal load and constant mechanical load is assessed in detail as a typical example. The consistent solutions of the accumulated creep strains, the varying flow stresses and the elastic follow-up factors with creep dwell time by these different methods confirm the applicability of the proposed new methods.

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Chatzopoulou, Giannoula, Ioannis Skarakis, Spyros A. Karamanos, Nicholas G. Tsouvalis y Aglaia E. Pournara. "Numerical Simulation of CFRP Reinforced Steel Pipe Elbows Subjected to Cyclic Loading". En ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63853.

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Strengthening of pipelines and piping systems under extreme loading conditions increases their operation safety level towards safeguarding their structural integrity. Motivated by the structural integrity of pipelines and piping systems, the present study aims at investigating the effect of Carbon Fiber Reinforced Plastic (CFRP) wrapping on the mechanical response of cyclically-loaded steel pipe elbows. Based on experimental testing results, a finite element model is developed, which simulates reinforced and non-reinforced pipe elbows specimens subjected to low-cyclic fatigue. For the description of the material nonlinearities, an efficient cyclic-plasticity material model is also employed, capable of describing both the yield plateau region of the steel stress-strain curve and the Bauschinger effect that appears under reverse plastic loading conditions. The results from the numerical models are compared successfully with the experimental data. Furthermore, a parametric analysis is conducted in order to examine the effect of internal pressure on the structural behavior of unreinforced and reinforced elbows, subjected to cyclic loading.

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Chatzigeorgiou, George, Yves Chemisky y Dimitris C. Lagoudas. "Modeling of Cyclic Response of High Temperature Shape Memory Alloys Undergoing Viscoplastic Mechanisms". En ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3730.

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In this work we present a constitutive model for High Temperature Shape Memory Alloys (HTSMAs), where the appearence of viscoplastic mechanisms during transformation influences the cyclic response of the actuator performance. Based on previous models developed for conventional SMAs, a Gibbs free energy potential is defined and the evolution equations for forward, reverse transformation, plasticity occuring during transformation, retained martensite and viscoplasticity are properly chosen. The calibration of the model is achieved with the help of experimental tests performed on TiPdNi alloy. The transformation behavior of the material is calibrated using fast load biased thermal cycling tests at selected stress levels with fast cooling/heating rate. The viscoplastic behavior of the HTSMA is captured with creep and uniaxial tests at appropriate temperature levels. Predictions of the model are compared with load biased thermal cycling tests at slow cooling/heating rate, where viscoplastic strains are significant.

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Chen, Weihang, Haofeng Chen, Tianbai Li y James Ure. "Limit, Shakedown and Ratchet Analyses of Defective Pipeline Under Internal Pressure and Cyclic Thermal Loading". En ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57013.

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In this study, the limit load, shakedown and ratchet limit of a defective pipeline subjected to constant internal pressure and a cyclic thermal gradient are analyzed. Ratchet limit and maximum plastic strain range are solved by employing the new Linear Matching Method (LMM) for the direct evaluation of the ratchet limit. Shakedown and ratchet limit interaction diagrams of the defective pipeline identifying the regions of shakedown, reverse plasticity, ratcheting and plastic collapse mechanism are presented and parametric studies involving different types and dimensions of part-through slot in the defective pipeline are investigated. The maximum plastic strain range over the steady cycle with different cyclic loading combinations is evaluated for a low cycle fatigue assessment. The location of the initiation of a fatigue crack for the defective pipeline with different slot type is determined. The proposed linear matching method provides a general-purpose technique for the evaluation of these key design limits and the plastic strain range for the low cycle fatigue assessment. The results for the defective pipeline shown in the paper confirm the applicability of this procedure to complex 3-D structures.

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Informes sobre el tema "Reverse Cyclic"

Vigil, Michael D. y Gary L. Kmuse. Performance Of Embedded Plate Connections Under Reversed Cyclic Loading. Precast/Prestressed Concrete Institute, 1993. http://dx.doi.org/10.15554/pci.rr.conn-007.

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Shimko, Martin A. y Paul M. Dunn. Combined Reverse-Brayton Joule Thompson Hydrogen Liquefaction Cycle. Office of Scientific and Technical Information (OSTI), diciembre de 2011. http://dx.doi.org/10.2172/1345523.

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Doty, F. D., A. Boman, S. Arnold, J. B. Spitzmesser, D. Jones, D. McCree y L. J. Hacker. Development of 0.5-5 W, 10K Reverse Brayton Cycle Cryocoolers - Phase II Final Report. Office of Scientific and Technical Information (OSTI), octubre de 2001. http://dx.doi.org/10.2172/899973.

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Pshezhetskiy, Dmitry, Tanveer Alam y Heba Alshaker. Unsynchronised Cardioversion as a Cause of Ventricular Tachycardia in a Patient with Atrial Fibrillation. Nature Library, noviembre de 2020. http://dx.doi.org/10.47496/nl.ccr.2020.01.02.

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Background: Synchronised cardioversion (SC) is used to terminate tachycardic arrhythmia by applying electric current to the thorax. SC is synchronised to the R wave of the cardiac cycle and ventricular tachycardia (VT) or ventricular fibrillation (VF) can occur if an electrical shock is provided in a nonsynchronised way. Case Presentation: Here we present a case of a 66-year-old man who had elective cardioversion for atrial fibrillation worsened by severe left ventricular impairment. A manual defibrillator was used for the cardioversion, which, after the first synchronised shock, reverted to defibrillator mode. An unsynchronised shock was administered and induced VT, which was reverted to sinus rhythm with a defibrillation shock. Conclusion: When using manual defibrillator for SC, the machine needs to be set to a synchronised mode. The synchronisation to the R wave needs to be checked before every shock.

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Monahan, Joseph F. Life-Cycle Cost Modeling to Determine whether Vehicle-to-Grid (V2G) Integration and Ancillary Service Revenue can Generate a Viable Case for Plug-in Electric Drive Vehicles. Fort Belvoir, VA: Defense Technical Information Center, junio de 2013. http://dx.doi.org/10.21236/ada586076.

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