Relevant bibliographies by topics / Mechanisms

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Mechanisms'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Mechanisms"

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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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Burns, John W. "Mechanisms, mechanisms, mechanisms." PAIN 157, no. 11 (November 2016): 2393–94. http://dx.doi.org/10.1097/j.pain.0000000000000696.

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Dworczak, Piotr. "Mechanism Design With Aftermarkets: Cutoff Mechanisms." Econometrica 88, no. 6 (2020): 2629–61. http://dx.doi.org/10.3982/ecta15768.

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I study a mechanism design problem in which a designer allocates a single good to one of several agents, and the mechanism is followed by an aftermarket—a post‐mechanism game played between the agent who acquired the good and third‐party market participants. The designer has preferences over final outcomes, but she cannot design the aftermarket. However, she can influence its information structure by publicly disclosing information elicited from the agents by the mechanism. I introduce a class of allocation and disclosure rules, called cutoff rules, that disclose information about the buyer's type only by revealing information about the realization of a random threshold (cutoff) that she had to outbid to win the object. When there is a single agent in the mechanism, I show that the optimal cutoff mechanism offers full privacy to the agent. In contrast, when there are multiple agents, the optimal cutoff mechanism may disclose information about the winner's type; I provide sufficient conditions for optimality of simple designs. I also characterize aftermarkets for which restricting attention to cutoff mechanisms is without loss of generality in a subclass of all feasible mechanisms satisfying additional conditions.
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Jensen, Brian D., and Larry L. Howell. "Identification of Compliant Pseudo-Rigid-Body Four-Link Mechanism Configurations Resulting in Bistable Behavior." Journal of Mechanical Design 125, no. 4 (December 1, 2003): 701–8. http://dx.doi.org/10.1115/1.1625399.

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Bistable mechanisms, which have two stable equilibria within their range of motion, are important parts of a wide variety of systems, such as closures, valves, switches, and clasps. Compliant bistable mechanisms present design challenges because the mechanism’s energy storage and motion characteristics are strongly coupled and must be considered simultaneously. This paper studies compliant bistable mechanisms which may be modeled as four-link mechanisms with a torsional spring at one joint. Theory is developed to predict compliant and rigid-body mechanism configurations which guarantee bistable behavior. With this knowledge, designers can largely uncouple the motion and energy storage requirements of a bistable mechanism design problem. Examples demonstrate the power of the theory in bistable mechanism design.
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Beyhaghi, Hedyeh, Negin Golrezaei, Renato Paes Leme, Martin Pál, and Balasubramanian Sivan. "Improved Revenue Bounds for Posted-Price and Second-Price Mechanisms." Operations Research 69, no. 6 (November 2021): 1805–22. http://dx.doi.org/10.1287/opre.2021.2121.

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How to optimize posted price mechanisms? The sequential posted-price (SPP) mechanism is one of the widely used selling mechanisms in practice. In this mechanism, the seller presents each buyer with a price sequentially and the buyer can either accept or reject the mechanism's offer. Despite the widespread use of the SPP mechanism, the problem of optimizing prices in this mechanism has not been fully addressed. In a paper entitled, “Improved Revenue Bounds for Posted-Price and Second-Price Mechanisms,” H. Beyhaghi, N. Golrezaei, R. Paes Leme, M. Pal, and B. Sivan construct SPP mechanisms by considering the best of two simple pricing rules: one that imitates the optimal mechanism and the other that posts a uniform price (same price for every buyer). Their simple pricing rules can be easily generalized to the setting with multiple units and yield the first improvement over long-established approximation factors.
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Cheng, Yingjie, Peng Song, Yukun Lu, Wen Jie Jeremy Chew, and Ligang Liu. "Exact 3D Path Generation via 3D Cam-Linkage Mechanisms." ACM Transactions on Graphics 41, no. 6 (November 30, 2022): 1–13. http://dx.doi.org/10.1145/3550454.3555431.

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Exact 3D path generation is a fundamental problem of designing a mechanism to make a point exactly move along a prescribed 3D path , driven by a single actuator. Existing mechanisms are insufficient to address this problem. Planar linkages and their combinations with gears and/or plate cams can only generate 2D paths while 1-DOF spatial linkages can only generate 3D paths with rather simple shapes. In this paper, we present a new 3D cam-linkage mechanism, consisting of two 3D cams and five links, for exactly generating a continuous 3D path. To design a 3D cam-linkage mechanism, we first model a 3-DOF 5-bar spatial linkage to exactly generate a prescribed 3D path and then reduce the spatial linkage's DOFs from 3 to 1 by composing the linkage with two 3D cam-follower mechanisms. Our computational approach optimizes the 3D cam-linkage mechanism's topology and geometry to minimize the mechanism's total weight while ensuring smooth, collision-free, and singularity-free motion. We show that our 3D cam-linkage mechanism is able to exactly generate a continuous 3D path with arbitrary shape and a finite number of C 0 points, evaluate the mechanism's kinematic performance with 3D printed prototypes, and demonstrate that the mechanism can be generalized for exact 3D motion generation.
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Tichánek, Radek. "Dasy Based Tool for The Design of Ice Mechanisms." Journal of Middle European Construction and Design of Cars 13, no. 3 (December 1, 2015): 33–40. http://dx.doi.org/10.1515/mecdc-2015-0013.

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Shrnutí Článek prezentuje nastroj pro navrhovani novych mechanismů spalovaciho motoru založeny na znalostni databazi DASY. Z mechanismů motoru byl vybran rozvodovy mechanismus OHC na kterem byl nastroj vyvinut a testovan. Nastroj obsahuje kinematicky a dynamicky model rozvodu napojeny na klikovy mechanismus. Podrobnou kalibraci a naslednou validaci třech dynamickych modelů s měřenymi daty, byly ziskany hodnoty neznamych parametrů modelů, ktere jsou zaznamenany v DASY a mnohe parametry jsou přimo použitelne pro navrh noveho mechanismu i při změně geometrie některych časti. V članku jsou prezentovany tři postupy použite nejen pro kalibraci, ale take pro identifikaci vlivu neznamych parametrů na průběh zrychleni ventilu a jeho kmitani. Nastroj byl použit pro navrhy obrysů vaček pro prototyp realneho mechanismu.
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FUNABASHI, Hiroaki. "Parallel Mechanisms As a New Robotic Mechanism." Journal of the Robotics Society of Japan 10, no. 6 (1992): 699–704. http://dx.doi.org/10.7210/jrsj.10.699.

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Feess, Eberhard, Christian Grund, Markus Walzl, and Ansgar Wohlschlegel. "Competing trade mechanisms and monotone mechanism choice." European Journal of Operational Research 280, no. 3 (February 2020): 1108–21. http://dx.doi.org/10.1016/j.ejor.2019.08.013.

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TAKEO, Koji, and Kazuhiro KOSUGE. "Parallel Mechanisms. Motion Control of Parallel Mechanism." Journal of the Japan Society for Precision Engineering 63, no. 12 (1997): 1655–58. http://dx.doi.org/10.2493/jjspe.63.1655.

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Dissertations / Theses on the topic "Mechanisms"

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Lezra, Esther Margaret. "Looking for monsters : mechanism of history, mechanisms of power /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2005. http://wwwlib.umi.com/cr/ucsd/fullcit?p3170235.

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Hyatt, Lance Parker. "Designing Developable Mechanisms on Conical and Cylindrical Developable Surfaces." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8467.

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The research results presented in this thesis provide tools and methods to aid in the design of developable mechanisms. This work will help engineers design compact mechanisms onto developable surfaces, making it possible for them to be used in future applications. The thesis introduces terminology and definitions to describe conical developable mechanisms. Models are developed to describe mechanism motion with respect to the apex of the conical surface, and connections are made to cylindrical developable mechanisms using projected angles. The Loop Sum Method is presented as an approach to determine the geometry of the cone to which a given spherical mechanism can be mapped. A method for position analysis is presented to determine the location of any point along the link of a mechanism with respect to the conical geometry. These methods are also applied to multiloop spherical mechanisms. This work created tools and methods to design cylindrical and conical developable mechanisms from flat, planar patterns. Equations are presented that relate the link lengths and link angles of planar and spherical mechanisms to the dimensions in a flat configuration. These flat patterns can then be formed into curved, developable mechanisms. Guidelines are established to determine if a mechanism described by a flat pattern can exhibit intramobile or extramobile behavior. A developable mechanism can only potentially exhibit intramobile or extramobile behavior if none of the links extend beyond half of the flat pattern. The behavior of a mechanism can change depending on the location of the cut of the flat pattern. Different joint designs are discussed including lamina emergent torsional (LET) joints. It is shown that developable mechanisms on regular cylindrical surfaces can be described using cyclic quadrilaterals. Mechanisms can exist in either an open or crossed configuration, and these configurations correspond to convex and crossed cyclic quadrilaterals. Using equations developed for both convex and crossed cyclic quadrilaterals, the geometry of the reference surface to which a four-bar mechanism can be mapped is found. Grashof mechanisms can be mapped to two surfaces in open or crossed configurations. The way to map a non-Grashof mechanism to a cylindrical surface is in its open configuration. Extramobile and intramobile behavior can be achieved depending on selected pairs within a cyclic quadrilateral and its position within the circumcircle. Selecting different sets of links as the ground link changes the potential behavior of the mechanism. Different cases are tabulated to represent all possibilities.
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Ciniero, Alessandra. "Triboemission mechanisms." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/62826.

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Reducing mechanical friction by improving lubrication in tribological contacts is still an important goal for researches around the word. The extensive use of lubricants in applications, ranging from heavy industry to micro-biology, makes the understanding of the mechanisms by which these lubricants behave an important challenge. The fact that certain boundary lubricating films form only on contacting surfaces implies that phenomena linked to wear may play a key role in this process. One of these phenomena is known as triboemission which refers to the emission of electrons, photons and other charged particles that occur when surfaces undergo wear. Despite the possibility that triboemission events may lead to the formation of protective boundary films and also may also be responsible for lubricant degradation, the mechanism behind this phenomenon is still not well understood. In this study, spatially resolved triboemission events were analysed in a sliding contact under vacuum condition. This was achieved using an in-house developed tribometer consisting of a system of electron multipliers coupled with a phosphor screen, which allowed the in situ visualization of emission events for the first time. A range of materials were assessed in order to understand the effects of mechanical and electrical properties on the triboemission behaviour. This showed unequivocally that conductive materials show negligible emission, while those with high electrical resistivity not only produce high levels of emission but also sustained after-emission, which has not been seen before. Moreover, following the application of certain image processing techniques, a strong correlation between the spatial distribution of emission events and the topography of surface wear features was revealed. This supports the theory that triboemission is a subset of fractoemission and arises due to the uneven distribution of charge on the opposing faces of wear cracks. It also raises the possibility of using triboemission to monitor wear in real time under high magnification. In addition to this, methods were developed to differentiate between negative, positive and neutral particles, showing that each of these is emitted simultaneously but with a different spatial distribution. Surface charge was also monitored simultaneously to emission detection, showing for the first time the interactions between triboemission and tribocharging – in particular, the generation of fractures causes emission events, which reverse the expected charging trend. This may explain tribocharging mechanisms. Finally, the use of this technique to monitor coating failure was investigated. Specifically, Diamond-Like-Carbon coating specimens were assessed in vacuum and atmosphere condition revealing that coating failure can be detected in real time by observing both emission and surface charge measurements. The results presented here shed light on poorly understood triboemission mechanisms, and helps to understand how the emission interacts with the surrounding environment.
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Traylor, Pamina. "Defense mechanisms /." Online version of thesis, 1995. http://hdl.handle.net/1850/12151.

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Gajdošech, Martin. "Purchase Price Mechanisms." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-162617.

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My diploma thesis focuses on the M&A transaction closing mechanisms. Their function is to reflect the value changes of the target company into the purchase price. Value change occurs during the time lag between the date of the financial statements and the date of the transaction closing. Throughout history, there have been two major approaches developed. The "Completion Accounts Mechanism" uses post-completion price adjustments to reflect the change of the net working capital and net debt during the interim period. The "Locked Box Mechanism", using fixed price, assures non-fluctuation of target value in the interim period by imposing strict restrictions on the seller's activities. In this research, I have analyzed 44 transactions closed in the Czech Republic. I have challenged the theoretical foundations and described the application of the mechanisms in practice. At the end, I have compared the Czech and European practices. Thesis findings: 1. All the theoretical features of the mechanisms were proven by an analyzed sample of closed transactions. The completion accounts mechanism is buyer-friendly, while the locked box is a seller-friendly mechanism. 2. The main driver in mechanism selection is bargaining power. Buyers were in a better negotiating position in 69% of the completion account transactions. On the contrary, the sellers had bargaining power in 100% of the locked box transactions. 3. The Czech Republic is an environment where buyers (big multinational companies) dominate. They have preferred the completion account mechanism that provides them with higher protection from value leakage or other risks associated with small CEE economies. A total of 91% of analyzed transactions were executed by the completion account mechanism in the Czech Republic between 2011 and 2012.
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Jensen, Brian D. "Identification of Macro- and Micro-Compliant Mechanism Configurations Resulting in Bistable Behavior." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/83.

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The purpose of this research is to identify the configurations of several mechanism classes which result in bistable behavior. Bistable mechanisms have use in many applications, such as switches, clasps, closures, hinges, and so on. A powerful method for the design of such mechanisms would allow the realization of working designs much more easily than has been possible in the past. A method for the design of bistable mechanisms is especially needed for micro-electro-mechanical systems (MEMS) because fabrication and material constraints often prevent the use of simple, well-known bistable mechanism configurations. In addition, this knowledge allows designers to take advantage of the many benefits of compliant echanisms, especially their ability to store and release energy in their moving segments. Therefore, an analysis of a variety of mechanism classes has been performed to determine the configurations of compliant segments or rigid-body springs in a mechanism which result in bistable behavior. The analysis revealed a relationship between the placement of compliant segments and the stability characteristics of the mechanism which allows either analysis or synthesis of bistable mechanisms to be performed very easily. Using this knowledge, a method of type synthesis for bistable mechanisms has been developed which allows bistable mechanisms to be easily synthesized. Several design examples have been presented which demonstrate the method. The theory has also been applied to the design of several bistable micromechanisms. In the process of searching for usable designs for micro-bistable mechanisms, a mechanism class was defined, known as "Young" mechanisms, which represent a feasible and useful way of achieving micro-mechanism motion similar to that of any four-bar mechanism. Based on this class, several bistable micro-mechanisms were designed and fabricated. Testing demonstrated the ability of the mechanisms to snap between the two stable states. In addition, the mechanisms showed a high degree of repeatability in their stable positions.
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Merriam, Ezekiel G. "Fully Compliant Mechanisms for Bearing Subtraction in Robotics and Space Applications." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3564.

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Robotics and space applications represent areas where compliant mechanisms can continue to make a significant impact by reducing costs and weight while improving performance. Because of the nature of these applications, a common need is for bearing replacement mechanisms, or mechanisms that perform the function of a bearing without the complexity and failure modes associated with bearings. Static balancing is a design strategy that attempts to reduce the actuation effort of a mechanism, and has been applied to compliant mechanisms in some applications. Monolithic construction, especially by means of 3D printing technology, is a strategy whereby the mechanism links and joints are built as a single "chunk" of material. This eliminates assembly and failure modes associated with wear and friction in traditional joints. In this work we examine these design strategies in the context of robotics and space applications. Matlab and Ansys batch files can be found in Appendix A. A fully compliant zero-torque, statically balanced mechanism is described that can undergo greater than 100 of motion. Because compliant mechanisms achieve their motion from the deflection of their constituent members, there is some strain energy associated with actuated positions. By introducing an appropriate pre-load, strain energy can be held constant. This can reduce or nearly eliminate the input force required from the actuating device. This paper describes the statically balanced rotary joint concept, and demonstrates its optimization, testing, and implementation for a haptic pantograph mechanism. The statically balanced properties of the constituent joints result in a mechanism with two balanced degrees of freedom. Matlab and Ansys batch files can be found in Appendix B. The conception, modeling, and development of a fully compliant two-degree-of-freedom pointing mechanism for application in spacecraft thruster, antenna, or solar array systems is described. The design objectives and the advantages of a compliant solution are briefly discussed. A single design concept is selected for final development from a field of generated concepts. Analytical and numerical models are accompanied by prototype testing and measurements in several iterations. A final design is described in detail, a fully compliant prototype is fabricated in titanium, and its performance is measured.
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Mann, Catherine. "Mechanisms of action of antidepressant drugs: Presynaptic and postreceptor mechanisms." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/10600.

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The etiology of clinical depression is unknown, but thought to be related to an impairment in brain transmission of monoamines. Depression is treated with antidepressant drugs which, regardless of classification, ultimately result in increased efficacy of aminergic transmission. Tricyclic antidepressants are known to inhibit the presynaptic uptake of amines. [3H]Imipramine, the prototype tricyclic antidepressant and a potential biological marker in depression, binds to both high- and a low-affinity sites in the brain. The high-affinity binding of [3H]imipramine to its binding site on the serotonin (5-HT) neuronal transporter has been shown to be a sodium-dependent process. However, that of [3H]paroxetine, a novel and selective 5-HT uptake inhibitor, has not yet been investigated. Because of a discrepancy between the onset of uptake-blocking effect and alleviation of depressive symptoms, the blockage of uptake is probably not the only pharmacological action of antidepressants underlying their clinical effect. Recent studies have reported decreases in beta-adrenoceptor and 5-HT2 receptor numbers following long-term treatment with antidepressants, and suggested that an adaptive change in amine receptors may be more relevent for the clinical effect. However, not all 5-HT uptake inhibitors elicit this downregulation. Recent research has thus centred on elucidating changes in the signal transduction apparatus of aminergic neurons. The 5-HT2 receptor in the brain is coupled to the phosphoinositide turnover cascade and protein kinase C (PKC) activity. The subcellular distribution of PKC following chronic antidepressant treatment has not yet been investigated. This study was undertaken (1) To compare the sodium dependence of [3H]paroxetine binding and [3H]5-HT uptake in rat diencephalon in order to confirm whether paroxetine binds to the 5-HT recognition site on the transporter, and (2) to investigate the effects of both acute and chronic antidepressant treatment on PKC location and activity (both basal and 5-HT2 receptor agonist (DOI)-challenged) in rat cortex and hippocampus. Results indicate that, antidepressant drugs induce differing but significant effects on PKC activity in the subcellular fractions of neurons both after acute and chronic treatment. These changes in PKC activity may alter transduction of cellular signals evoked by the binding of 5-HT to receptors. (Abstract shortened by UMI.)
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Statham, A. J. "Reward mechanisms, depression and drug dependence : psychobiological and developmental mechanisms." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639101.

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Exposing rodents to a chronic regime of mild stressors (CMS) has been shown to produce enduring decreases in the consumption of palatable weak (1%) sucrose solution. This effect is thought to be analogous to the decreases in reward sensitivity observed in patients suffering from depression. It has been argued that this CMS model represents the most realistic model of depression. Chronic mild stress failed to produce any enduring reductions in sucrose intake, in either inbred or outbred Lister hooded male rats, in three studies. It was hypothesised that early abberant mother-infant interactions would facilitate the appearance of CMS-induced deficits. However, CMS failed to reduce sucrose consumption in either male (inbred Lister hooded) or female (inbred and outbred Lister hooded) rats which had undergone a regime of repeated maternal separation (RMS), or in the respective control rates. These findings add to the growing number of studies challenging the central status of CMS as a valid and reliable animal model of depression. Furthermore, these findings provide compelling evidence in favour of re-evaluating our approach to the study of chronic stress in this country and, furthermore, its contribution to the aetiology of depression. The RMS regime enhanced the locomotor activating effects of a low dose of d-amphetamine. Subsequent studies revealed that 24-hr maternal separation (at postnatal day 3) enhanced and reduced the locomotor activating effects of cocaine in females and males, respectively. These findings are potentially interesting with regard to the study of individual differences in the propensity to drug abuse. However, methodological difficulties impeded the full replication of these findings. The corticosterone synthesis inhibitor metyrapone produced a massive potentiation of the behavioural activating effects of d-amphetamine. This effect was probably the result of metyrapone-induced inhibition of cytochrome P450 2D1, an enzyme involved in the metabolism of d-amphetamine. This finding has potential serious implications for the current clinical use of metyrapone.
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Bergström, Roger. "Fibre flow mechanisms." Doctoral thesis, KTH, Fiber- och polymerteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240.

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The flow behaviour, and primarily the floc-floc interaction, of pulp paper suspensions have been studied visually. Analogy models based on these observations have been developed as well as the identification of important parameters of floc break-up in low shear rate flow fields. Floc compressions and the locations of voids (areas of lower fibre concentration) where found to influence the floc splitting mechanism. Based on this investigation an equipment for measuring the load carrying ability of fibre flocs and networks was designed, and the effect of measurement geometry, network structure and fibre suspension concentration was investigated. The load carrying ability with concentration increases rapidly when going from 1% to 2% in initial suspension concentration. A model handling the fibre floc behaviour during extension and compression has been developed, and some basic flocculated flow mechanisms are discussed on an analogy basis. A modified Voigt element is use, describing mainly the compressional behaviour and plastic behaviour of loose fibre network structures. Further the pos- sibility of stress chain formation is discussed on a fibre level as well as on a floc level. The effect of fibre flow (shear field) occurring in the forming zone of a roll former has been studied in detail. Basic forming mechanisms on floc scale has been investi- gated, and the effect of running parameters like dewatering pressure and jet-to-wire speed difference as well as the fibre type and concentration of the pulp suspension has been evaluated. It is evident that floc elongation increases with shear rate (jet-to-wire speed difference) and lower dewatering rate. The latter is because the fibre floc is subjected to the shear field longer due to slower immobilisation. Shorter fibre tends to create weaker networks, which promotes a higher elongation of the flocs.
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Books on the topic "Mechanisms"

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Caldwell, Raymond. Mechanisms. Tonbridge: Hands On Publishing, 1997.

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Rich, Steve. Mechanisms. Cheltenham: Thornes, 1991.

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CCA Wattis Institute for Contemporary Arts and Wiener Secession, eds. Mechanisms. San Francisco: CCA Wattis Institute for Contemporary Arts, 2017.

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Lenarčič, Jadran. Robot Mechanisms. Dordrecht: Springer Netherlands, 2013.

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Lobontiu, Nicolae. Compliant Mechanisms. Second edition. | Boca Raton : CRC Press, 2021.: CRC Press, 2020. http://dx.doi.org/10.1201/9780429184666.

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Lenarcic, Jadran, Tadej Bajd, and Michael M. Stanišić. Robot Mechanisms. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-4522-3.

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Mori, Nozomu, and Inhee Mook-Jung, eds. Aging Mechanisms. Tokyo: Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55763-0.

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Bruckner, Reinhard. Organic Mechanisms. Edited by Michael Harmata. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-03651-4.

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Calzavarini, Fabrizio, and Marco Viola, eds. Neural Mechanisms. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-54092-0.

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Koloc, Zdeněk. Cam mechanisms. Amsterdam: Elsevier, 1993.

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Book chapters on the topic "Mechanisms"

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Machamer, Peter, and Thomas V. Cunningham. "Mechanisms." In Encyclopedia of Science Education, 1–3. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6165-0_263-2.

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Hummel, Rolf E. "Mechanisms." In Understanding Materials Science, 24–65. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4757-2972-6_3.

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Fincher, Sally, Marian Petre, and Martyn Clark. "Mechanisms." In Computer Science Project Work, 67–124. London: Springer London, 2001. http://dx.doi.org/10.1007/978-1-4471-3700-9_2.

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Lambach, Daniel, Markus Bayer, Felix S. Bethke, Matteo Dressler, and Véronique Dudouet. "Mechanisms." In Nonviolent Resistance and Democratic Consolidation, 63–131. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39371-7_4.

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Abel, Ernest L. "Mechanisms." In Fetal Alcohol Abuse Syndrome, 183–210. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-5217-5_14.

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Gooch, Jan W. "Mechanisms." In Encyclopedic Dictionary of Polymers, 449. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7259.

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Machamer, Peter, and Thomas V. Cunningham. "Mechanisms." In Encyclopedia of Science Education, 625–28. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-2150-0_263.

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Maziarz, Mariusz. "Mechanisms." In The Philosophy of Causality in Economics, 107–53. Milton Park, Abingdon, Oxon; New York, NY: Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9780429346422-5.

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Lenarčič, Jadran, Tadej Bajd, and Michael M. Stanišić. "Mechanisms." In Robot Mechanisms, 61–89. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-4522-3_2.

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Tata, Darrell B., and Ronald W. Waynant. "Mechanisms." In Lecture Notes in Electrical Engineering, 3–9. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-71809-5_1.

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Conference papers on the topic "Mechanisms"

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Murphy, Morgan D., Ashok Midha, and Larry L. Howell. "On the Mobility of Compliant Mechanisms." In ASME 1994 Design Technical Conferences collocated with the ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/detc1994-0291.

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Abstract The topological synthesis for a compliant mechanism leads to a very large number of design options from which to select a final design. Therefore, an evaluation of a mechanism’s ability to meet selected criteria provides a means of reducing a large number of possible designs to a smaller set of acceptable designs. One criterion deals with a mechanism’s potential mobility. For mechanisms containing flexible members, the response to inputs, in general, is comprised of both rigid-body and elastic deflections of their members. This paper deals primarily with the development of a technique for the determination of mobility characteristics of compliant mechanisms, employing a mathematical model previously developed for compliant mechanisms.
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Kim, Charles J. "On the Geometry of Stiffness and Compliance Under Concatenation." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97161.

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Abstract Eigentwists and eigenwrenches capture the stationary stiffness behavior of compliant mechanisms and can be related to a mechanism’s primary kinematic behavior. The nature of concatenation of multiple mechanism building blocks is not well-understood. In this paper, we consider the mechanics of concatenation and develop design rules that capture the geometric nature of concatenation in terms of eigenwrenches and eigentwists. The rules are illustrated through mechanisms from the literature. The design rules have potential to provide intelligent guidance for systematic building block synthesis of compliant mechanisms.
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Zhu*, Yaping. "Understanding geopressure mechanisms using micro-mechanics." In SEG Technical Program Expanded Abstracts 2014. Society of Exploration Geophysicists, 2014. http://dx.doi.org/10.1190/segam2014-0895.1.

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Hetrick, Joel A., and Sridhar Kota. "Size and Shape Optimization of Compliant Mechanisms: An Efficiency Formulation." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/mech-5943.

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Abstract Compliant mechanisms are jointless mechanical devices that take advantage of elastic deformation to achieve a force or motion transformation. A milestone toward systematic design of compliant mechanisms has been the development of topology optimization techniques. The next logical step is to incorporate size and shape optimization to identify the exact dimensional form of the mechanism. A new objective formulation based on maximizing the mechanical efficiency of a compliant mechanism is developed in order to perform the size and shape optimization. An advantage of this formulation is that precise control over the mechanism’s mechanical or geometric advantage can be enforced during optimization. Finite element beam models are used to perform dimensional synthesis of planar compliant mechanisms. This technique allows stress constraints to limit the maximum stress in the mechanism which improves the mechanism’s durability and flexibility. Resulting optimized mechanisms exhibit efficient mechanical transmission and meet kinematic and stress requirements. Several examples are given to demonstrate the effectiveness of the optimization procedure.
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Korves, Brian A., Brian J. Slaboch, and Philip A. Voglewede. "Mechanism State Matrices for Spatial Reconfigurable Mechanisms." 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/detc2012-71361.

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This paper improves augmented mechanism state matrices by replacing joint code with screw system notation. The proposed substitution allows for a more specific description of the joints in the mechanism and the capability to describe both spatial and planar mechanisms. Examples are provided which elucidate the proposed approach.
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Chew, Meng-Sang, Richard W. Longman, and Minh Q. Phan. "Intelligent Mechanisms." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57553.

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An intelligent mechanism is a traditional mechanism that incorporates within it, elements of intelligence both at the design stage. Thepurpose is to increase the operational envelop of the original meachanism so that it can now exhibit some from of learning, adapting, or responding to changes in the environment or new operating conditions. Since mechanisms are usually designed for repetitive motions, the application of intelligence that makes specific use of repetitive characteristics will markedly improve the functionality of the mechanisms. This is particularly true if the mechanisms have been incorporated with such intelligence at the early stages of design. This article develops the concept of an intelligent mechanism through the application of Iterative Learning Control and Repetitive Control methodologies to several traditional mechanisms. These range from the simple slider-crank and four-bar linkage to timing belts.
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Midha, Ashok, Tony W. Norton, and Larry L. Howell. "On the Nomenclature and Classification of Compliant Mechanisms: Abstractions of Mechanisms and Mechanism Synthesis Problems." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0385.

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Abstract A compliant mechanism is one which gains all or part of its mobility from the relative flexibility of its members rather than from rigid-body joints only. Compliant mechanisms offer clear advantages, such as need for fewer parts, less wear, noise and backlash due to clearances, when compared to rigid-body mechanisms performing similar functions. This important field is expected to undergo significant growth as materials with superior properties are developed. In the development of compliant mechanisms, the establishment of nomenclature and classification is of primary importance. This paper discusses common representations, i.e. names and diagrams, for a compliant mechanism. Names and diagrams will be shown to be similar because they represent “abstractions” of the same mechanism. The concept of “levels of abstraction” is introduced, and common levels of abstraction are identified. The relevance of this concept to the naming of mechanisms is shown by applying it to both rigid-body and compliant mechanism examples. Nomenclature is proposed for several of the common levels of abstraction, and issues involved in naming mechanisms are discussed. Finally, a discussion of synthesis types is presented, as are the advantages, disadvantages, and issues involved in the synthesis of a compliant mechanism.
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Di Gregorio, Raffaele. "Systematic Use of Instant Centers in the Dynamics Analysis of Single-DOF Planar Mechanisms." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46065.

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Many even complex machines employ single-dof planar mechanisms. The instantaneous kinematics of planar mechanisms can be fully understood by analyzing where the instant centers (ICs) of the relative motions among mechanism’s links are located. ICs’ positions depend only on the mechanism configuration in single-dof planar mechanisms and a number of algorithms that compute their location have been proposed in the literature. Once ICs positions are known, they can be exploited, for instance, to determine the velocity coefficients of the mechanism and the virtual work of the external forces applied to mechanism’s links. Here, these and other ICs’ properties are used to build a novel dynamic model and an algorithm that solves the dynamic problems of single-dof planar mechanisms. Then, the proposed model and algorithm are applied to a case study.
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Derderian, James M., Larry L. Howell, Morgan D. Murphy, Scott M. Lyon, and Spencer D. Pack. "Compliant Parallel-Guiding Mechanisms." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/mech-1208.

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Abstract The rigid-link parallel-guiding (or parallelogram) mechanism is perhaps one of the simplest closed-loop mechanisms to analyze. Compliant parallel-guiding mechanisms, often called plate-spring mechanisms, are in common use in many applications. Advances in compliant mechanism modeling and synthesis have provided an opportunity to apply these mechanisms in an even wider range of uses. Unlike the rigid-link parallel-guiding mechanism which has a simple configuration defined by one kinematic chain, this paper reveals that twenty-eight compliant parallel-guiding mechanism configurations exist. Also, traditional plate spring mechanisms have been designed to function in the linear, small-deflection range and this paper describes a design approach that allows for deflections well into the non-linear range. The purpose of this paper is then threefold: i) identify all configurations of compliant parallel-guiding mechanisms, ii) provide a method for the design and analysis of compliant parallel-guiding mechanisms, and iii) provide experimental data to validate the above purposes. Additionally, the third purpose mentioned is important outside of the context of the parallel-guiding mechanism. The experimental results presented will help to validate the pseudo-rigid-body-model concept.
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Damerla, Revanth, and Shorya Awtar. "Constraint-Based Analysis of Parallel Kinematic Articulated Wrist Mechanisms." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22704.

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Abstract This paper presents a systematic constraint-based analysis of the motion attributes of six parallel kinematic articulated wrist mechanisms from the existing literature. These motion attributes include the number, nature (i.e. pure rotation, or translation, or a combination), and location of mechanism’s Degrees of Freedom (DoFs) in the nominal and displaced configurations, range of operation along these DoFs, load transmission capability along these DoFs, and load bearing capability along the constraint directions. This systematic analysis reveals performance tradeoffs between these motion attributes for a given mechanism, as well as design tradeoffs across these multiple mechanisms with respect to these motion attributes. This analysis should help inform the suitability of a given mechanism for specific applications.
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Reports on the topic "Mechanisms"

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Newman, C., A. Menon-Sen, A. Melnikov, and N. Williams. Salted Challenge Response Authentication Mechanism (SCRAM) SASL and GSS-API Mechanisms. RFC Editor, July 2010. http://dx.doi.org/10.17487/rfc5802.

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Myers, J. IMAP4 Authentication Mechanisms. RFC Editor, December 1994. http://dx.doi.org/10.17487/rfc1731.

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Antill, Samuel, and Darrell Duffie. Augmenting Markets with Mechanisms. Cambridge, MA: National Bureau of Economic Research, December 2017. http://dx.doi.org/10.3386/w24146.

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Missert, Nancy A., and Lyle Brent Brunke. Thermal battery degradation mechanisms. Office of Scientific and Technical Information (OSTI), September 2015. http://dx.doi.org/10.2172/1222664.

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Hake, Sarah. Mechanisms in Plant Development. Office of Scientific and Technical Information (OSTI), August 2013. http://dx.doi.org/10.2172/1090744.

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Daigle, L., D. van, R. Iannella, and P. Falstrom. URN Namespace Definition Mechanisms. RFC Editor, June 1999. http://dx.doi.org/10.17487/rfc2611.

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Auden, Elizabeth Catherine. Basic Mechanisms: Displacement Damage. Office of Scientific and Technical Information (OSTI), June 2019. http://dx.doi.org/10.2172/1524360.

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Price, E. W., R. K. Sigman, and C. P. Markou. Combustion Mechanisms of Solids. Fort Belvoir, VA: Defense Technical Information Center, February 1992. http://dx.doi.org/10.21236/ada247088.

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Olton, David S., Kevin Pang, and Howard Egeth. Neural Mechanisms of Attention. Fort Belvoir, VA: Defense Technical Information Center, May 1993. http://dx.doi.org/10.21236/ada266315.

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Olson, G. B. Mechanisms of transformation toughening. Office of Scientific and Technical Information (OSTI), February 1992. http://dx.doi.org/10.2172/5879138.

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