Academic literature on the topic 'Concerted mechanism'

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Journal articles on the topic "Concerted mechanism"

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Yonetani, Takashi. "Allosteric Mechanism of Hemoglobin: Concerted Mechanisms or Graded Mechanisms." Biophysical Journal 96, no. 3 (February 2009): 438a. http://dx.doi.org/10.1016/j.bpj.2008.12.2244.

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Miura, Retsu, and Yoshihiro Miyake. "The reaction mechanism of d-amino acid oxidase: Concerted or not concerted?" Bioorganic Chemistry 16, no. 1 (March 1988): 97–110. http://dx.doi.org/10.1016/0045-2068(88)90039-9.

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Liao, Daiqing. "Concerted Evolution: Molecular Mechanism and Biological Implications." American Journal of Human Genetics 64, no. 1 (January 1999): 24–30. http://dx.doi.org/10.1086/302221.

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Winkler, Andreas, Andrzej Łyskowski, Sabrina Riedl, Martin Puhl, Toni M. Kutchan, Peter Macheroux, and Karl Gruber. "A concerted mechanism for berberine bridge enzyme." Nature Chemical Biology 4, no. 12 (October 26, 2008): 739–41. http://dx.doi.org/10.1038/nchembio.123.

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Iguchi-Ariga, Sanae M. M., and Hiroyoshi Ariga. "Concerted mechanism of DNA replication and transcription." Cell Structure and Function 14, no. 6 (1989): 649–51. http://dx.doi.org/10.1247/csf.14.649.

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Islam, Zahidul, Timothy S. Strutzenberg, Ilya Gurevic, and Amnon Kohen. "Concerted versus Stepwise Mechanism in Thymidylate Synthase." Journal of the American Chemical Society 136, no. 28 (July 2014): 9850–53. http://dx.doi.org/10.1021/ja504341g.

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Cremer, Dieter, Elfi Kraka, Ramon Crehuet, Josep Anglada, and Jürgen Gräfenstein. "The ozone–acetylene reaction: concerted or non-concerted reaction mechanism? A quantum chemical investigation." Chemical Physics Letters 347, no. 1-3 (October 2001): 268–76. http://dx.doi.org/10.1016/s0009-2614(01)01032-6.

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Borisenko, Konstantin B., Yixin Chen, Se Ahn Song, Duc Nguyen-Manh, and David J. H. Cockayne. "A concerted rational crystallization/amorphization mechanism of Ge2Sb2Te5." Journal of Non-Crystalline Solids 355, no. 43-44 (October 2009): 2122–26. http://dx.doi.org/10.1016/j.jnoncrysol.2009.06.029.

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Jay, Eleanor E., Michael J. D. Rushton, and Robin W. Grimes. "Migration of fluorine in fluorapatite – a concerted mechanism." Journal of Materials Chemistry 22, no. 13 (2012): 6097. http://dx.doi.org/10.1039/c2jm16235k.

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Jackson, M. L., E. E. Jay, M. J. D. Rushton, and R. W. Grimes. "A concerted mechanism for Cl−migration in chlorapatite." J. Mater. Chem. A 2, no. 38 (August 6, 2014): 16157–64. http://dx.doi.org/10.1039/c4ta03275f.

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Dissertations / Theses on the topic "Concerted mechanism"

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Sun, Ho-Yan. "Studies on the Mechanism of Direct Arylation of Pyridine N oxides: Evidence for the Essential Involvement of Acetate from the Pd(OAc)2 Pre-Catalyst at the C-H Bond Cleaving Step." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19760.

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Detailed mechanistic studies on the palladium-catalyzed direct arylation of pyridine N-oxides are presented. The order of each reaction component is determined to provide a general mechanistic picture. The C-H bond cleaving step is examined in further detail through computational studies, and the calculated results are in support of an inner-sphere concerted metallation-deprotonation (CMD) pathway. Competition experiments were conducted using N-oxides of varying electronic characters, and results revealed an enhancement of rate when using a more electron-deficient species which is in support of a CMD transition state. The effect of base on reaction rate was also examined and it was found that a carboxylate base was required for the reaction to proceed. This led to the conclusion that Pd(OAc)2 plays a pivotal role in the reaction mechanism as more than merely a pre-catalyst, but as a source of acetate base required for the C-H bond cleavage step.
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Abdel, Latif Marwa K. "Electrochemical oxidation of aliphatic carboxylates: Kinetics, thermodynamics, and evidence for a shift from a concerted to a stepwise mechanism in the presence of water." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82522.

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The mechanism and the oxidation potential of the dissociative single electron transfer for tetra-n-butylammonium acetate has been investigated via conventional (cyclic voltammetry) and convolution voltammetry. The oxidation potential for tetra-n-butylammonium acetate was determined to be 0.60 ± 0.10 (vs. Ag/ (0.1 M) AgNO3) in anhydrous acetonitrile. The results also indicated the mechanism of oxidation was concerted dissociative electron transfer (cDET), rather than stepwise as was previously reported. To further investigate the mechanism, a series of aliphatic and aromatic tetra-n butylammonium carboxylates were synthesized and investigated via convolution and conventional methods under anhydrous conditions (propionate, pivalate, phenyl acetate, and benzoate). The reported results showed high reproducibility and consistency with a concerted dissociative electron transfer for aliphatic carboxylates with a systematic shift in the oxidation potentials (0.60 ± 0.09 V for acetate, 0.47 ± 0.05 V for propionate, and 0.40 ± 0.05 V for pivalate) within the series which is expected trend based on radical stabilization energies of the alkyl groups on the aliphatic carboxylates. Hydrogen bonding was investigated as a possible source for the discrepancy between our results and the reported mechanism of the dissociative electron transfer. Because of the extreme hygroscopic nature of carboxylate salts, it was hypothesized that the presence of small amounts of water might alter the reaction mechanism. Deionized water and deuterium oxide additions to anhydrous acetonitrile were performed to test this hypothesis. The mechanism was noted to shift towards a stepwise mechanism as water was added. In addition, the derived oxidation potentials became more positive with increasing concentrations of water. Several explanations are presented with regards to water effects on the shift in the electron transfer mechanism. Indirect electrolysis (homogeneous redox catalysis) was also employed as an alternative and independent approach to quantify the oxidation potentials of carboxylates. A series of substituted ferrocenes were investigated as mediators for the oxidation of tetra-n-butylammonium acetate. Preliminary data showed redox catalysis was feasible for these systems. Further analyses of the electrochemical results suggested a follow-up chemical step (addition to mediator) that competes with the redox catalysis mechanism. As predicted from theoretical working curves, a plateau region in the ip/ipd plots (where no meaningful kinetic information could be obtained) was observed. Products mixture analyses verified the consumption of the mediator upon electrolysis, but no further information with regards to the nature of the mechanism was deduced. In a related study the effects of hydrogen bonding and ions on the reactivity of neutral free radicals were examined by laser flash photolysis. The rate of the β-scission of the cumyloxyl radical is influenced by cations (Li+ > Mg2+ ≈ Na+ > nBu4N+) due to stabilizing ion-dipole interactions in the transition state of the developing carbonyl group. Experimental findings are in a good agreement with theoretical work suggesting metal ion complexation can cause radical clocks to run fast with a more significant effect if there is an increase in dipole moment going from the reactant to the transition state.
Ph. D.
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Pope, Patricia A. "Investigation of Multiple Concerted Mechanisms Underlying Stimulus-induced G1 Arrest in Yeast: A Dissertation." eScholarship@UMMS, 2006. http://escholarship.umassmed.edu/gsbs_diss/680.

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Progression through the cell cycle is tightly controlled, and the decision whether or not to enter a new cell cycle can be influenced by both internal and external cues. For budding yeast one such external cue is pheromone treatment, which can induce G1 arrest. Two distinct mechanisms are known to be involved in this arrest, one dependent on the arrest protein Far1 and one independent of Far1, but the exact mechanisms have remained enigmatic. The studies presented here further elucidate both of these mechanisms. We looked at two distinct aspects of the Far1-independent arrest mechanism. First, we studied the role of the G1/S regulatory system in G1 arrest. We found that deletion of the G1/S transcriptional repressors Whi5 and Stb1 compromises Far1-independent arrest, but only partially, and that this partial arrest failure correlates to partial de-repression of G1/S transcripts. Deletion of the CKI Sic1, however, is more strongly required for arrest in the absence of Far1, though not when Far1 is present. Together, this demonstrates that functionally overlapping regulatory circuits controlling the G1/S transition collectively provide robustness to the G1 arrest response. We also sought to reexamine the phenomenon of pheromone-induced loss of G1/S cyclin proteins, which we suspected could be another Far1-independent arrest mechanism. We confirmed that pheromone treatment has an effect on G1 cyclin protein levels independent of transcriptional control. Our findings suggest that this phenomenon is dependent on SCFGrr1but is at least partly independent of Cdc28 activity, the CDK phosphorylation sites in Cln2, and Far1. We were not, however, able to obtain evidence that pheromone increases the degradation rate of Cln1/2, which raises the possibility that pheromone reduces their synthesis rate instead. Finally, we also studied the function of Far1 during pheromone-induced G1 arrest. Although it has been assumed that Far1 acts as a G1/S cyclin specific CDK inhibitor, there has been no conclusive evidence that this is the case. Our data, however, suggests that at least part of Far1’s function may actually be to interfere with Cln-CDK/substrate interactions since we saw a significant decrease of co-pulldown of Cln2 and substrates after treatment with pheromone. All together, the results presented here demonstrate that there are numerous independent mechanisms in place to help robustly arrest cells in G1.
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Pope, Patricia A. "Investigation of Multiple Concerted Mechanisms Underlying Stimulus-induced G1 Arrest in Yeast: A Dissertation." eScholarship@UMMS, 2013. https://escholarship.umassmed.edu/gsbs_diss/680.

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Progression through the cell cycle is tightly controlled, and the decision whether or not to enter a new cell cycle can be influenced by both internal and external cues. For budding yeast one such external cue is pheromone treatment, which can induce G1 arrest. Two distinct mechanisms are known to be involved in this arrest, one dependent on the arrest protein Far1 and one independent of Far1, but the exact mechanisms have remained enigmatic. The studies presented here further elucidate both of these mechanisms. We looked at two distinct aspects of the Far1-independent arrest mechanism. First, we studied the role of the G1/S regulatory system in G1 arrest. We found that deletion of the G1/S transcriptional repressors Whi5 and Stb1 compromises Far1-independent arrest, but only partially, and that this partial arrest failure correlates to partial de-repression of G1/S transcripts. Deletion of the CKI Sic1, however, is more strongly required for arrest in the absence of Far1, though not when Far1 is present. Together, this demonstrates that functionally overlapping regulatory circuits controlling the G1/S transition collectively provide robustness to the G1 arrest response. We also sought to reexamine the phenomenon of pheromone-induced loss of G1/S cyclin proteins, which we suspected could be another Far1-independent arrest mechanism. We confirmed that pheromone treatment has an effect on G1 cyclin protein levels independent of transcriptional control. Our findings suggest that this phenomenon is dependent on SCFGrr1but is at least partly independent of Cdc28 activity, the CDK phosphorylation sites in Cln2, and Far1. We were not, however, able to obtain evidence that pheromone increases the degradation rate of Cln1/2, which raises the possibility that pheromone reduces their synthesis rate instead. Finally, we also studied the function of Far1 during pheromone-induced G1 arrest. Although it has been assumed that Far1 acts as a G1/S cyclin specific CDK inhibitor, there has been no conclusive evidence that this is the case. Our data, however, suggests that at least part of Far1’s function may actually be to interfere with Cln-CDK/substrate interactions since we saw a significant decrease of co-pulldown of Cln2 and substrates after treatment with pheromone. All together, the results presented here demonstrate that there are numerous independent mechanisms in place to help robustly arrest cells in G1.
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Chamseddine, Yssam. "Sondes mecanistiques chirales et/ou regioselectivement deuteriees : application a l'etude de quelques processus de substitution nucleophile." Paris 6, 1988. http://www.theses.fr/1988PA066133.

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Le, Carrou Jean-Loïc. "Vibro-acoustique de la harpe de concert." Phd thesis, Université du Maine, 2006. http://tel.archives-ouvertes.fr/tel-00133443.

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La harpe de concert est un instrument à cordes dont les propriétés acoustiques et vibratoires ont fait l'objet de peu d'études. L'objectif visé au cours de ce travail de thèse est de comprendre et de modéliser le comportement vibro-acoustique de cet instrument.
Dans une première partie, une description générale de l'instrument est proposée, de ses origines à sa constitution actuelle. Une attention particulière est ensuite portée à l'interaction entre le doigt et la corde au moment du pincement : l'analyse d'images obtenues avec une caméra rapide permet d'obtenir les paramètres d'un modèle d'interaction.
Dans une deuxième partie, le rayonnement acoustique du corps sonore de l'instrument est étudié. Ce rayonnement met en jeu des couplages entre la table d'harmonie et la caisse de résonance. Une analyse modale, complétée par des mesures de vitesse particulaire acoustique en sortie d'évents permet d'identier deux modes couplés caractéristiques du comportement vibro-acoustique de l'instrument en basses fréquences. Un modèle discret 2 degrés de liberté décrivant la réponse de la harpe autour des fréquences de ces deux modes est développé. Du fait de la particularité des mécanismes d'amortissement présents dans le système, l'estimation des paramètres du modèle n'est possible que grâce à l'utilisation d'une méthode non standard d'analyse modale : l'appropriation par le calcul. Par ailleurs, le rayonnement acoustique en champ lointain est étudié à l'aide d'une antenne de microphones. La méthode dite des sources équivalentes est appliquée an d'identier une distribution de monopoles acoustiques rendant compte du rayonnement acoustique de l'instrument. Finalement, en basses fréquences, la harpe de concert est modélisée par 2 sources acoustiques élémentaires, l'une placée sur la table d'harmonie et l'autre au niveau des évents.
La troisième partie est consacrée à l'étude des couplages entre les cordes et la table d'harmonie qui donnent lieu à des phénomènes de résonance par sympathie. Ces couplages sont étudiés au moyen d'un modèle d'instrument à cordes générique constitué d'une poutre encastrée à ses extrémités sur laquelle des cordes sont xées à leurs extrémités. Le formalisme du vecteur d'état et la méthode des matrices de transfert sont utilisés pour décrire la propagation des ondes de exion et de compression dans chaque sous-structure (cordes et poutre). A partir des conditions de couplage entre les sous-structures, les modes de l'assemblage sont déterminés et ceux responsables du phénomène de vibration par sympathie sont identiés. Appliqués au cas de la harpe de concert, ces modes, dit sympathiques, sont également extraits expérimentalement. Les multiples couplages entre les cordes, occasionnés par ces modes, donnent lieu à des signaux musicaux présentant un grand nombre de composantes spectrales, dont les fréquences sont parfois très proches et non résolues dans un même partiel. L'identication de ces composantes est alors eectuée par l'emploi de méthodes spéciques du traitement du signal : des méthodes à haute résolution.
Des résultats issus de ces travaux sont mis en perspective pour des applications possibles en facture instrumentale.
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Kolesky, Scott Eric. "Bacteriophage T4 developmental gene regulation : the actions of [sigma] and anti-[sigma] factors in concert with novel transcriptional activating mechanisms /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3007137.

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Chadefaux, Delphine. "Interaction musicien / instrument : le cas de la harpe de concert." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00828314.

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Dans le domaine de l'acoustique musicale, les recherches visant à la compréhension des instruments ont rendu possible la modélisation et la synthèse sonore de nombre d'entre eux. Cependant, le degré de connaissance acquis d'un système matériel, si élevé soit-il, ne permet pas à lui seul de prédire son comportement à la suite d'une interaction avec l'homme. L'étude de l'interaction entre musicien et instrument fait ainsi l'objet de nombreux travaux de recherche afin de prendre en considération son effet sur la production sonore et d'effectuer, à terme, des synthèses sonores plus réalistes. Au cours de leur apprentissage, les musiciens développent une importante maîtrise de leur instrument de manière à exécuter précisément les gestes nécessaires à la qualité sonore désirée. La mise en évidence des paramètres de contrôle pertinents vis-à-vis du son produit, dans le cas de la harpe de concert, est au centre de ce travail de thèse. Dans un premier temps, cette interaction est étudiée à l'échelle du musicien par le biais d'une analyse de ses gestes instrumentaux et ancillaires en relation avec le contexte et l'intention musicale. La seconde partie de ce travail se focalise sur la cause directe de la production sonore, i.e. le pincement de la corde. La spécificité et l'importante répétabilité de ce geste pour chaque instrumentiste est ainsi mise en évidence. Enfin, une modélisation de l'interaction entre le doigt du musicien et la corde de harpe enrichie des précédents résultats est proposée, validée par l'utilisation d'un doigt artificiel contrôlable et paramétrable.
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Thally, Ryan. "Automation in Entertainment: Concept, Design, and Application." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/honors/401.

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The focus of this thesis is to explore the automation technology used in the modern entertainment industry. Upon completion of my thesis, I will deliver a working prototype of the chosen technology and present its capabilities in a choreographed show.
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Burkel, Jean-Christophe. "Les approches sectorielles dans la diplomatie climatique." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM1042.

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L'approche sectorielle consiste à envisager la limitation ou la réduction des émissions mondiales de gaz à effet de serre secteur par secteur. Une telle approche implique un changement de paradigme par rapport à l'approche dominante de la diplomatie climatique qui s'articule principalement autour d'engagements portant sur l'ensemble de l'économie des différents Etats Parties. La principale question à laquelle tente de répondre la présente thèse de doctorat est de déterminer de quelle manière et sous quelles conditions la diplomatie climatique pourrait s'appuyer sur une approche sectorielle pour accroître l'efficacité des efforts internationaux de lutte contre les changements climatiques. Il s'agit de déterminer si la généralisation de démarches, de politiques, d'actions ou de mesures par secteur pourrait permettre de réduire substantiellement et au moindre coût les émissions de gaz à effet de serre. Pour ce faire, de nombreuses pistes de réflexions sont envisagées : des négociations distinctes au sein d'organisations internationales spécialisées, des initiatives sectorielles volontaires, des partenariats internationaux, des démarches sectorielles et autres mesures par secteurs concertées, des mécanismes sectoriels fondés sur le marché. Dans chaque cas de figure, il s'agit d'examiner dans quels secteurs, mais également autour de quelles parties prenantes et à partir de quels mécanismes, des démarches sectorielles pourraient concrètement émerger
Sectoral approaches refer to a series of new proposals, which focuses on the limitation of world greenhouse gas emission on a sector-by-sector basis. Thess approaches relie on a change of paradigm with regard to the dominant approach of the international climate regime, which is based upon an economy-wide approach towards GHG emissions. The main issue addressed by this PhD dissertation is to clarify how and under which conditions a sectoral approach could efficiently and effectively contribute to the reduction of global greenhouse gas emissions. Could sector-specific initiatives, policies, actions and measures practically reduce GHG emissions at the lowest cost? In which sectors? Involving which stakeholders? Relying on which legal, economic or financial instruments? A sectoral approach could potentially be implemented through different legal/economic/financial means: separated sectoral negotiations within specialised international organisations, voluntary sectoral initiatives, international sector-based partnerships, cooperative approaches and sector-specific actions and/or sectoral market-based mechanisms. Subsequently, this dissertation evaluates the relevance and the practical feasibility of various sector-based proposals during the first period of commitment and beyond 2012
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Books on the topic "Concerted mechanism"

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Diwan, Ishac. Voluntary choices in concerted deals: Mechanics and attributes of the menu approach. Washington, DC (1818 H St. NW, Washington 20433): International Economics Department, World Bank, 1990.

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Al-Hassan, Omar. The Kingdom of Bahrain: The mechanisms of international parties concerned with human rights. London: Gulf Centre for Strategic Studies Ltd, 2013.

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Schiller, Dan. Beyond a U.S.-centric Internet? University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252038761.003.0013.

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This chapter examines the mechanism of the United States's internet control over the Domain Name System (DNS). The mechanism of U.S. internet control over the DNS was formalized after President Bill Clinton directed the Commerce Department to privatize the DNS in 1997. Legal contracts were drawn up, binding the Department to a for-profit corporation called VeriSign and to a private, not-for-profit corporation, the Internet Corporation for Assigned Names and Numbers (ICANN). The chapter considers the Commerce Department's DNS initiative as an example of the geopolitics of today's internet, an extraterritorial projection of U.S. policymaking that was extraordinary for transforming into a venue where other countries mounted a concerted diplomatic challenge to U.S. power. The chapter also discusses the multi-stakeholderism in U.S.-centric internet and Edward Snowden's revelations regarding the National Security Agency's surveillance of global internet traffic.
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Advances in Detailed Reaction Mechanisms: Radical, Single Electron Transfer, and Concerted Reactions : 1991 (Advances in Detailed Reaction Mechanisms). JAI Press, 1991.

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Williams, Andrew. Concerted Organic and Bio-Organic Mechanisms (New Directions in Organic and Biological Chemistry). CRC, 1999.

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Grand complimentary concert to Mrs. Godard at the Mechanics' Institute: Friday eve'g., Nov. 17 : programme. [Saint John, N.B.?: s.n., 1986.

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Association, Saint John Musical, ed. Concert!: The Saint John Musical Association will give a concert at the Mechanics' Institute, on Friday evening, 12th inst. .. [S.l: s.n., 1986.

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Saint John Oratorio Society (N.B.), ed. St. John Oratorio Society, Mechanics' Institute: Tuesday evening, July 10th, 1888 : Handel's sacred oratorio, Judas Maccabæus, with orchestra and chorus .. [S.l: s.n., 1987.

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New Brunswick Historical Society, ninth anniversary musical festival: Mechanics' Institute, Monday, Nov. 26th, at 8 p.m., for Centennial Arbor Day Fund. [S.l: s.n., 1986.

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Escudier, Marcel. Introduction to Engineering Fluid Mechanics. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198719878.001.0001.

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Turbojet and turbofan engines, rocket motors, road vehicles, aircraft, pumps, compressors, and turbines are examples of machines which require a knowledge of fluid mechanics for their design. The aim of this undergraduate-level textbook is to introduce the physical concepts and conservation laws which underlie the subject of fluid mechanics and show how they can be applied to practical engineering problems. The first ten chapters are concerned with fluid properties, dimensional analysis, the pressure variation in a fluid at rest (hydrostatics) and the associated forces on submerged surfaces, the relationship between pressure and velocity in the absence of viscosity, and fluid flow through straight pipes and bends. The examples used to illustrate the application of this introductory material include the calculation of rocket-motor thrust, jet-engine thrust, the reaction force required to restrain a pipe bend or junction, and the power generated by a hydraulic turbine. Compressible-gas flow is then dealt with, including flow through nozzles, normal and oblique shock waves, centred expansion fans, pipe flow with friction or wall heating, and flow through axial-flow turbomachinery blading. The fundamental Navier-Stokes equations are then derived from first principles, and examples given of their application to pipe and channel flows and to boundary layers. The final chapter is concerned with turbulent flow. Throughout the book the importance of dimensions and dimensional analysis is stressed. A historical perspective is provided by an appendix which gives brief biographical information about those engineers and scientists whose names are associated with key developments in fluid mechanics.
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Book chapters on the topic "Concerted mechanism"

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Kronmüller, H., and K. D. Durst. "Magnetic Hardening Mechanism in Re-Fe-B Permanent Magnets." In Concerted European Action on Magnets (CEAM), 392–404. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1135-2_34.

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Scholz, U. D., and H. Nagel. "A Contribution to the Mechanism of the Hydrogenation of Nd-Fe-B-Alloys and the Use of Hydrogenated Alloy for Permanent Magnet Production." In Concerted European Action on Magnets (CEAM), 521–31. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1135-2_45.

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Givord, D., P. Tenaud, and T. Viadieu. "Coercivity Mechanisms in Nd-Fe-B and Other Sintered Magnets." In Concerted European Action on Magnets (CEAM), 381–91. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1135-2_33.

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Ponamarev, M. V., and W. A. Cramer. "Non-Concerted Reduction of Cytochromes f and b6 in Mutants Affecting the Cytochrome f Internal Water Chain." In Photosynthesis: Mechanisms and Effects, 1585–88. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_373.

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Bellanca, Nicolò, and Luca Pardi. "Per una teoria del declino delle società complesse." In Studi e saggi, 129–45. Florence: Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-5518-195-2.13.

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To explain social decline, a first mechanism notes that elites, understood as small and relatively homogeneous groups, have a superiority to act in concert, compared to the masses. When the capitalist dynamics offers great opportunities to take advantage, and when such opportunities distribute costs over large groups, while concentrating the benefits in a few hands, then the elites have an incentive to intervene. To maintain privileged access to opportunities, elites seek alliances and resort to all forms of social power. Society decays when this path transforms it into a network of particularistic groups, committed to dividing given resources, instead of innovating and improving. A second mechanism is based on the responses of complex societies to challenges. The answers try to bridge the gap between the complexity of the control system and the increased complexity of the controlled system. They may consist either in constructing hierarchical modules, so that many subjects obey a few, or in multiplying the connections through reticular structures. The more the answer stratifies the hierarchy, the more the management costs of the apparatus increase. On the other hand, the more it insists on links, the more coordination costs increase between the many players in the network. The society tends to swing from one to the other, depending on which becomes more onerous. But both modes lead in the long run to decreasing energy returns, pushing the system on a path of decline. Even without the claim of composing an exhaustive investigation, the two mechanisms arise from some of the most relevant and recurrent characteristics of complex human societies: respectively, the difficulties of cooperation and the difficulties of responding to the arising of new systemic problems. In this sense, the two mechanisms may be able to help us understand what happens and what could happen.
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Ghersi, Adriana. "Capo Mele: a story-telling experimental beach in Laigueglia (sv)." In Proceedings e report, 242–49. Florence: Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-5518-147-1.24.

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The transformation of the coastal landscape assumes a significant importance, as far as global changes and erosion risks are concerned. The experience at Capo Mele to stage a new approach to the beach, managed by a smart private agent, allows more readings and new possible strategic actions. The initiative promotes the beach area as an active museum, to test and monitor new mechanisms for the use, protection and narration of landscape values, in the various aspects of adaptability, socio-cultural development and enhancement of the potential of the beach as a treasure chest of biodiversity.
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Startsev, A. N. "Concerted Mechanism of Thiophene Hydrogenolysis by Sulfide HDS Catalysts." In Studies in Surface Science and Catalysis, 1911–14. Elsevier, 1993. http://dx.doi.org/10.1016/s0167-2991(08)64188-9.

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Clohesy, William W. "Untimely Thoughts on the Public Market." In The Paideia Archive: Twentieth World Congress of Philosophy, 7–16. Philosophy Documentation Center, 1998. http://dx.doi.org/10.5840/wcp20-paideia199814285.

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The marketplace as an institution enjoys widespread popularity today. Many economists hold that most of society’s problems could be best solved by applying the market mechanism to them. Government, by contrast, is widely considered to be a problem rather than a solution. Some would like to see the government restructured along market lines so that policies would follow voter choice, as products follow that of consumers. Some, myself included, believe that a world in which all relationships are rendered matters of private choice would lack the "public happiness" that comes from participation in public discourse and concerted action. In this paper I address what it would mean for the market to be truly public. A market that is truly public will discourage speculative investment so that managers of various firms can concentrate on the long term good of creating a social institution through which the concerted efforts of various stakeholders are coordinated. In this way, stakeholders can enrich the world through their work.
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Chetri, Shiela. "Post-Covid-19 Era: What is Next?" In Urinary Tract Infection and Nephropathy - Insights into Potential Relationship [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96276.

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Antimicrobial resistance (AMR) is a natural phenomenon in bacteria which becomes a threat for health-care settings around the world. A concerted global response is needed to tackle rising rates of antibiotic resistance, without it we risk returning to the pre antibiotic era. As bacteria evolve very fast according to the environment in which they inhabit via developing different defence mechanisms to combat with the noxious agents like different classes of antibiotics including carbapenems. This results into treatment failure and clinical complications. Global emergence of antibiotic resistance due to bacterial multidrug efflux pump systems are a major and common mechanism of intrinsic antimicrobial resistance employed by bacteria which are spreading rapidly due to over use or misuse of antimicrobial agents. This review mainly focusses on the transcriptional expression of efflux pump system AcrAB-TolC, local regulatory genes (AcrR and AcrS), mediating carbapenem resistance in clinical isolates of Escherichia coli under antibiotic stress, a genetic interplay study between intrinsic and acquired antibiotic resistance mechanisms along with a brief summary on high risk factors and prevalence of urinary tract infections by multidrug resistant Uropathogenic Escherichia coli.
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Chadwick, Anna. "World Hunger, the Global Food System, and (International) Law." In Law and the Political Economy of Hunger, 19–48. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198823940.003.0002.

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This chapter seeks to explain why it is that in spite of long-standing and concerted interventions to address world hunger the efforts of the international community have consistently fallen short. The chapter begins by locating the origins of the contemporary global food system in the period of European colonialism, and it then explores the place of law in creating conditions of food insecurity through the establishment of new market relations between colonial powers and colonized peoples. Particular attention is paid to the special role of public international law in enabling the perpetuation of colonial dynamics even after the period of decolonization through neocolonial practices of ‘economic development’. After examining the operations of regimes of international economic law and their interaction with private law norms, the chapter concludes that international law has been a key mechanism whereby the food security of populations of the Global South has been subordinated to the economic interests of wealthier market actors in the Global North.
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Conference papers on the topic "Concerted mechanism"

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Michelassi, V., L. Chen, R. Pichler, R. Sandberg, and R. Bhaskaran. "High-Fidelity Simulations of Low-Pressure Turbines: Effect of Flow Coefficient and Reduced Frequency on Losses." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43429.

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Large Eddy Simulations validated with the aid of Direct Numerical Simulation are used to study the concerted action of reduced frequency and flow coefficient on the performance of the T106A low-pressure-turbine profile. The simulations are carried out by using a discretization in space and time that allows minimizing the accuracy loss with respect to Direct Numerical Simulation. The reference Reynolds number is 100,000, while reduced frequency and flow coefficient cover a range wide enough to provide valid qualitative information to designers. The various configurations reveal differences in the loss generation mechanism that blends steady and unsteady boundary layer losses with unsteady wake ingestion losses. Large values of the flow coefficient can alter the pressure side unsteadiness, and the consequent loss generation. Low values of the flow coefficient are associated with wake fogging and reduced unsteadiness around the blade. The reduced frequency further modulates these effects. The simulations also reveal a clear trend of losses with the wake path, discussed by conducting a loss-breakdown analysis that distinguishes boundary layer from wake distortion losses.
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Jacobs, Keith M., Sandeep Misri, Barbara Meyer, Suyash Raj, Cheri L. Zobel, Barry P. Sleckman, Dennis E. Hallahan, and Girdhar G. Sharma. "Abstract 3300: Concerted epigenetic and signaling mechanisms regulate normal stem cell radiosensitivity." In Proceedings: AACR 106th Annual Meeting 2015; April 18-22, 2015; Philadelphia, PA. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.am2015-3300.

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Kumar, Rajesh S., and Matthew M. Mordasky. "Foreign Object Impact Damage in Ceramic Matrix Composites: Experiments and Computational Predictions." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90368.

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Abstract Foreign object impact of Ceramic Matrix Composite (CMC) materials and components in a gas turbine engine environment could be detrimental to engine performance and hence must be accounted for in the design of such components. This paper is concerned with experiments and computational modeling of foreign object impact phenomenon in Silicon Carbide-based CMC. Controlled impact experiments were conducted on the CMC material using a gas-gun apparatus with spherical hardened steel projectile. The internal damage state within the CMC specimens was assessed using X-ray computed tomography scan technique. The computational modeling involved explicit dynamic finite element simulation of the impact process wherein either delamination mechanism is modeled or both ply damage and delamination mechanisms are modeled in a coupled manner. The delamination mechanism is modeled explicitly using cohesive-zone fracture mechanics approach, whereas, the ply damage mechanisms are modeled implicitly using simplified continuum damage mechanics approach. The simulation results were found to be in reasonable qualitative and quantitative agreement with the experimental results. Furthermore, it is shown that modeling both the ply damage and delamination mechanisms are essential to predict the correct delamination pattern even for intermediate velocity impacts that leads to predominantly delamination damage. The predictive nature of the modeling approach is demonstrated and approaches to enhance the models are also discussed.
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Li, Wang. "Establishment of China's Tax-Concerned Information Cooperation and Sharing Mechanism from the International Perspective." In Fifth International Conference on Public Management : International Collaboration for Innovated Public Governance (ICPM 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/icpm-18.2018.14.

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Larochelle, Pierre M. "Circuit and Branch Rectification of the Spatial 4C Mechanism." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/mech-14053.

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Abstract Spatial 4C mechanisms are two degree of freedom kinematic closed-chains consisting of four rigid links simply connected in series by cylindrical(C) joints. In this work we are concerned with the design of spatial 4C mechanisms which move a rigid body through a finite sequence of prescribed locations in space. This task is referred to as rigid-body guidance by Suh and Radcliffe (20) and as motion generation by Erdman and Sandor (6). When 4C mechanisms are synthesized for such a task, for example by utilizing Roth’s spatial generalization of Burmester’s planar methods (17; 18), the result is the physical dimensions which kinematically define the mechanism. However, the motion of the mechanism which takes the workpiece through the sequence of prescribed locations in space is not determined. In fact, it may be impossible for the mechanism to move the body through all of the desired locations without disassembling the mechanism. This condition is referred to as a circuit defect. Moreover, in some cases the mechanism may enter a configuration which requires an additional mechanical input to guide the moving body as desired. These are referred to as branch defects. This paper presents a methodology for analyzing spatial 4C mechanisms to eliminate circuit and branch defects in motion generation tasks.
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Yim, Neung Hwan, Seok Won Kang, and Yoon Young Kim. "Synthesis of Gear-Linkage Mechanisms by Topology Optimization." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85298.

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This work is concerned with a new mechanism synthesis method for the simultaneous determination of the type, number and dimension of mechanisms by topology optimization. Earlier topology optimization methods can synthesize linkage mechanisms that consist only of links and joints. The proposed synthesis method is a gradient-based topology optimization method useful for the synthesis of planar mechanisms consisting of linkages and gears. To formulate the topology optimization based method, we propose two superposed design spaces as a ground structure: the linkage and gear design spaces. The gear design space is discretized by newly proposed gear blocks while the linkage design space by rigid blocks. The zero-length springs with variable stiffness are used to control the connectivity of blocks, which in turns determines the configuration of the synthesized mechanism. After the proposed topology-optimization-based synthesis formulation is presented, its effectiveness and validity are checked with various synthesis examples.
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Liu, Rui, David S. K. Ting, and M. David Checkel. "Characteristics of Ammonia-Nitric Oxide Combustion." In International Joint Power Generation Conference collocated with TurboExpo 2003. ASMEDC, 2003. http://dx.doi.org/10.1115/ijpgc2003-40111.

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The combustion characteristics of premixed ammonia-nitric oxide mixtures at atmospheric and elevated conditions were numerically examined. The laminar burning velocity, flame temperature and flammability limits were determined using the GRI 3.0 and the Miller-Bowman 1989 reaction mechanisms in CHEMKIN. A freely propagating adiabatic flame was assumed to facilitate the investigation. The laminar burning velocities and the flammability limits predicted with the two mechanisms were compared with experimental values measured in a constant volume combustion chamber. The predicted flammability limits are at ammonia-nitric oxide equivalence ratios of 0.2 and 3.5. The predicted laminar burning velocity increases with the unburnt mixture temperature and decreases with the pressure with a peak value at ammonia-nitric oxide equivalence ratio of 0.9. The Miller-Bowman 1989 mechanism predicts results closer to the measured values than the GRI 3.0 mechanism when the laminar burning velocity is concerned. For the adiabatic flame temperature, the predictions from both mechanisms agree well with each other.
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Slavutin, Michael, Offer Shai, and Andreas Müller. "Mobility Determination of Mechanisms Based on Rigidity Theory." In 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/detc2012-71289.

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Rigidity theory deals mostly with the topological computation in mechanical systems, i.e. it aims at making generic statements. Mechanism theory is mainly concerned with the geometrical analysis but again also with generic statements. Even more so for mobility analysis where one is interested in both the generic mobility and that of a particular mechanism. In rigidity theory the mathematical foundation is the topology representation using bar-joint and body-bar graphs, and the corresponding rigidity matrix. In this paper novel geometric rules for constructing the body-bar rigidity matrix are derived for general planar mechanisms comprising revolute and prismatic joints. This allows, for the first time, the treatment of general planar mechanisms with the body-bar approach. The rigidity matrix is also derived for spatial mechanisms with spherical joints. The bar-joint rigidity matrix is shown to be a special case of body-bar representation. It is shown that the rigidity matrices allow for mobility calculation as shown in the paper. This paper is aimed at supplying a unified view and as a result to enable the mechanisms community to employ the theorems and methods used in rigidity theory. An algorithm for mobility determination — the pebble game — is discussed. This algorithm always finds the correct generic mobility if the mechanism can be represented by a body-bar graph.
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Hsu, Meng-Hui, Zong-You Tsai, Long-Chang Hsieh, and Jen-Yu Liu. "On the Design of Three Links Robot for Drawing Epicycloid and Hypocycloid Curves." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95546.

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An epicycloid or hypocycloid mechanism is capable of drawing an exact epicycloid or hypocycloid curve. Similar mechanism designs can be found abundantly in industrial machines or educational equipment. Currently, the major type of epicycloid or hypocycloid configurations is planetary gear trains, which contain a binary link that has one fixed and one moving pivot, and a singular link adjacent to the moving pivot. The main feature of the configurations is that any point on the singular link may describe an epicycloid or hypocycloid curve when the binary link is rotated. Presently, the major types of configurations of epicycloid (hypocycloid) mechanisms have one degree of freedom. However, at present, as far as the authors are concerned, there appears to be no approach in designing epicycloid (hypocycloid) mechanisms with two degrees of freedom. Thus, the main aim of this paper is to develop a new design method in designing new configurations of epicycloid (hypocycloid) mechanisms. This paper analyses the characteristics of the topological structures of existing planetary gear train type epicycloid (hypocycloid) mechanisms with one degree of freedom. The equation of motion and kinematical model of the mechanism was derived and appropriate design constraints and criteria were implemented. Subsequently, using the design constraints and criteria, this work designs a new and simple epicycloid (hypocycloid) mechanism that is a three-links robot and has two degrees of freedom. We can easily control the angular velocities of the binary and singular links to satisfy the criterion to draw an epicycloid (hypocycloid) curve. Additionally, an epicycloid (hypocycloid) path of a point on the three links robot is simulated by computer drawing to prove the feasibility of proposed theory. Finally, a prototype of three links robot for drawing an epicycloid (hypocycloid) path is done well. We know the methods of design and manufacture of the proposed epicycloid or hypocycloid mechanism in linkage is easily done.
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Crews, Joshua, Ashok Midha, and Lokeswarappa R. Dharani. "Reduction of Stress in Plastic Compliant Mechanisms by Introducing Metallic Reinforcement." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-68426.

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A method is provided and validated for redesigning compliant segments to improve their fatigue, creep, and stress relaxation performance. The method reduces the bending stress in the polymer portion of the compliant segment without the need for overall mechanism redesign, by introducing metallic reinforcement and by matching the force-deflection response of the redesigned segment to that of the baseline segment. An example redesign case study is presented and validated with experimental testing using a unique deflection testing device designed for fixed-free compliant mechanisms. This vein of research is undertaken using metallic reinforcement (inserts) toward the development of a new class of compliant mechanisms with significantly greater performance, particularly insofar as the problems of fatigue and creep are concerned.
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Reports on the topic "Concerted mechanism"

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Foster, Jessica. Survey of Legal Mechanisms Relating to Groundwater Along the Texas-Mexico Border. Edited by Gabriel Eckstein. Texas A&M University School of Law Program in Natural Resources Systems, April 2018. http://dx.doi.org/10.37419/eenrs.groundwateralongborder.

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The purpose of this study is to present a factual picture of the multiple groundwater governance frameworks that cover the same transboundary aquifers on the Texas-Mexico border. The study can then serve as a foundation to support future research and as a reference for those sharing groundwater resources on the border to use in considering whether and how to coordinate management. Currently, Texas A&M School of Law, the Bush School of Government and Public Service at Texas A&M University, and the Texas Water Resources Institute are collaboratively pursuing a larger interdisciplinary project, and the study presented in this report is part of that concerted endeavor. First, the project establishes a study area, then identifies who are the stakeholders in the area, and finally summarizes the various rules each entity applies to groundwater. The study area selected is based on the aquifers identified in the 2016 study noted above (see Figure 1). Although there is currently no formal agreement between governments or users in Mexico and Texas for managing the reservoirs that cross underneath the international border, this survey represents a preliminary step in addressing the larger problems that the absence of a cooperative groundwater management framework presents. All of the institutional approaches employed in the various jurisdictions surveyed here model features from which developing management approaches could draw. Equally, noting gaps in the institutional approaches themselves and the ad hoc groundwater withdrawals occurring outside the reach of those institutions illustrates potential value in engaging local users in Texas’ and Mexico’s respective groundwater governance arrangements.
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Chandrasekhar, C. P. The Long Search for Stability: Financial Cooperation to Address Global Risks in the East Asian Region. Institute for New Economic Thinking Working Paper Series, March 2021. http://dx.doi.org/10.36687/inetwp153.

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Forced by the 1997 Southeast Asian crisis to recognize the external vulnerabilities that openness to volatile capital flows result in and upset over the post-crisis policy responses imposed by the IMF, countries in the sub-region saw the need for a regional financial safety net that can pre-empt or mitigate future crises. At the outset, the aim of the initiative, then led by Japan, was to create a facility or design a mechanism that was independent of the United States and the IMF, since the former was less concerned with vulnerabilities in Asia than it was in Latin America and that the latter’s recommendations proved damaging for countries in the region. But US opposition and inherited geopolitical tensions in the region blocked Japan’s initial proposal to establish an Asian Monetary Fund, a kind of regional IMF. As an alternative, the ASEAN+3 grouping (ASEAN members plus China, Japan and South Korea) opted for more flexible arrangements, at the core of which was a network of multilateral and bilateral central bank swap agreements. While central bank swap agreements have played a role in crisis management, the effort to make them the central instruments of a cooperatively established regional safety net, the Chiang Mai Initiative, failed. During the crises of 2008 and 2020 countries covered by the Initiative chose not to rely on the facility, preferring to turn to multilateral institutions such as the ADB, World Bank and IMF or enter into bilateral agreements within and outside the region for assistance. The fundamental problem was that because of an effort to appease the US and the IMF and the use of the IMF as a foil against the dominance of a regional power like Japan, the regional arrangement was not a real alternative to traditional sources of balance of payments support. In particular, access to significant financial assistance under the arrangement required a country to be supported first by an IMF program and be subject to the IMF’s conditions and surveillance. The failure of the multilateral effort meant that a specifically Asian safety net independent of the US and the IMF had to be one constructed by a regional power involving support for a network of bilateral agreements. Japan was the first regional power to seek to build such a network through it post-1997 Miyazawa Initiative. But its own complex relationship with the US meant that its intervention could not be sustained, more so because of the crisis that engulfed Japan in 1990. But the prospect of regional independence in crisis resolution has revived with the rise of China as a regional and global power. This time both economics and China’s independence from the US seem to improve prospects of successful regional cooperation to address financial vulnerability. A history of tensions between China and its neighbours and the fear of Chinese dominance may yet lead to one more failure. But, as of now, the Belt and Road Initiative, China’s support for a large number of bilateral swap arrangements and its participation in the Regional Comprehensive Economic Partnership seem to suggest that Asian countries may finally come into their own.
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