Relevant bibliographies by topics / Design de mechanisme

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  2. Dissertations / Theses
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Academic literature on the topic 'Design de mechanisme'

Author: Grafiati
Published: 7 February 2023

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Journal articles on the topic "Design de mechanisme"

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Udris, N. S. "Pedagogical technologies of design-advertiser design culture formation." Educational Dimension 26 (December 14, 2009): 360–69. http://dx.doi.org/10.31812/educdim.7046.

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The article is the part of complex research on development of organizational mechanisme of adjusting of society of 21th item. In the article pedagogical experience of author is analysed in the contenc of forming of project culture of personality. In the article the examples of tasks are presented as elements of educational and educate process of the indicated orientation in institutes (on specialities there is a "design", "advertising" and the method of their conducting a teacher is described.
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T, Nurhannifah Rizky. "Adolescent Coping Mechanisme At SMK Negeri 1 Medan On Sexual Harassment." Journal of Midwifery and Nursing 3, no. 3 (October 22, 2021): 98–102. http://dx.doi.org/10.35335/jmn.v3i3.1703.

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Sexual harassment is all kinds of behavior that leads to sexual things that are carried out unilaterally and are not expected by the person who is the target, causing negative reactions such as shame, anger, hatred, offence, and so on in individuals who are victims of harassment. This study uses a descriptive design that aims to describe the coping mechanisms of adolescents at SMK Negeri 1 Medan against sexual harassment. The sample in this study were 94 teenagers at SMK Negeri 1 Medan. Sampling using the Stratified proportional random sampling method. The results showed that the adolescent's coping mechanism against sexual harassment was adaptive (n=78;83%). Adolescents used problem-focused coping mechanisms (n=61; 65%) and using coping mechanisms that focus on emotions (n=33;35%). Adolescents at SMK Negeri 1 Medan use adaptive coping mechanisms to the problem of sexual harassment. Based on the results of the research, it is hoped that the education office and the school can work together with health workers to provide counseling regarding the problem of sexual harassment and efforts to deal with the problem of sexual harassment in adolescents. So that acts of sexual harassment can be faced by adolescents with adaptive coping and can reduce the incidence of sexual harassment in adolescents. Based on the results of the research, it is hoped that the education office and the school can work together with health workers to provide counseling regarding the problem of sexual harassment and efforts to deal with the problem of sexual harassment in adolescents. So that acts of sexual harassment can be faced by adolescents with adaptive coping and can reduce the incidence of sexual harassment in adolescents. Based on the results of the research, it is hoped that the education office and the school can work together with health workers to provide counseling regarding the problem of sexual harassment and efforts to deal with the problem of sexual harassment in adolescents. So that acts of sexual harassment can be faced by adolescents with adaptive coping and can reduce the incidence of sexual harassment in adolescents.
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Tendean, Angelia Friska. "STRESS AND COPING MECHANISM AMONG PROFESI NERS STUDENTS UNIVERSITAS KLABAT." Nutrix Journal 4, no. 1 (April 28, 2020): 54. http://dx.doi.org/10.37771/nj.vol4.iss1.424.

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Stress is a complex problem that occurs in individual and communities, both at home, school, and workplace. Response to stress is known as coping. The present study aimed to identify level of stress among students and to determine the coping mechanism and to identify relation betweeen stress level and coping mechanism among students ners profession in Universitas Klabat. Methodology in this study using a cross-sectional study with decriptive correlation design that was conducted among 80 students ners profession were selected by using probabililty sampling method with consecutive sampling techniques. The results are the majority of respondents were mild stress were 45 respondents (56,3%), and all of respondents (100%) have adaptive coping mechanism. There was statisically significant correlation (p=0.028, r=-0.246*) between stress and coping mechanism among students ners profession at Universitas klabat with coefisien correlation were weak and negative correlation, that means lowest stress will increase adaptive coping mechanism. Recommendation for faculty training students ners profession on adaptive coping, managing stressors and improving supports systems may helpfull for them to effectively deal with various stressors during their educational experience. Keywords: Coping Mechanisme, Ners Profession, Stress
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Batan, I. Made Londen, Rodika, and Muhamad Riva'i. "Three Wheel Bike as Physical Therapy Equipment for Post-Stroke Patient." Applied Mechanics and Materials 776 (July 2015): 337–42. http://dx.doi.org/10.4028/www.scientific.net/amm.776.337.

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Three wheel bike as a physical therapy equipment for post-stroke patients was designed with length of 1937 mm, 1010 mm in width and height of 905 mm. The bike is designd ergonomic and can be driven by rider foot or hand simultaneously. By using CATIA software the strength of material bike frame was analyst to support 100 kg of load. The design is realized into a prototype. The performance of bike prototype is tested, and the result sows that the function of bike mechanisme is fulfilled. By 10 respondents, who have a standard body mass index, the pedal test was conducted, and the result indicates that, the higher the speed of the pedal, the higher the energy consumption to pedaling. Leg tension muscles is measured by leg-dynamometer before and after pedaling, and the result shows the tension muscle is proportional to the increase of pedal speed. In order to evaluate the ergonomic aspect of bike design, the risk angle of extrem position of body during cycling are measured by goneo-set. By RULA method the risk of injury value of rider body is calculated while pedaling, and the result showed that 70% of respondents have a value of risk injury 2, while 30% had a value of 3. It means that, the bike design is ergonomic and comfortable to ride. In oder to evaluate the benefits of disigned bike, the pedal test is conducted by 4 post-stroke patients for 30 days periodical once every 3 days. The result shows that during 1 month exercise, the average number of cycling to pedal increase up to 100%. This means that the ability of post-stroke patients to pedal the bike increase significantly. That result showed that the bike design is useful as a tool for physical therapy post-stroke patients.
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Sitepu, Sari Desi Esta Ulina, Ade Viaulina, Selamat Tuahta Sipayung, Pratiwi Christa Simarmata, and Junita Ika Susanti Br Ginting. "HUBUNGAN TINGKAT KECEMASAN DENGAN MEKANISME KOPING PADA PASIEN GAGAL GINJAL KRONIK YANG MENJALANI HEMODIALISA DI RUANGAN HEMODIALISA RUMAH SAKIT GRANDMED LUBUK PAKAM." JURNAL KEPERAWATAN DAN FISIOTERAPI (JKF) 3, no. 2 (April 30, 2021): 159–64. http://dx.doi.org/10.35451/jkf.v3i2.521.

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Chronic renal failure is a disorder in which the body’s ability renal function failed to maintain metabolism, fluid and electrolyte balance. Hemodialysis is a process used patients in a state of acute illness requiring long-term therapy. The patients with renal failure often experience fear because of the conditions they experienced pain this can be a physical stressor that can lead patients to levels of stress and anxiety. Research design using cross- sectional. The population includes hemodialysis patients of Grandmed Hospital Lubuk Pakam. Samples consisting of 43 respondents meeting inclusion criteria were selected using purposive sampling method.This study presented based on the frequency and characteristics of respondents with results of the appointment that anxiety levels can be categorized as mild anxiety (18,6%), moderate anxiety ( 41,9%), and severe anxiety (39,5%). For coping mechanisme of adaptive coping (39,5%) and maladaptive coping (60,5%) category. Analysis of this research data using chi-Square. The results showed that there was an association of anxiety level with coping mechanism in patients with chronic renal failure who underwent hemodialysis at Grandmed Hospital Lubuk Pakam with p = 0,031. The more adaptive the respondent’s clutch the lighter the level of anxiety experienced. The results of this study was expected to nurse or hemodialysis officers further improve the provision of counseling to patients hemodialysis so that patients are able use adaptive coping in the face of anxiety.
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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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Meshram, Pankaj, and N. P. Awate N. P. Awate. "Design, Analysis of Mechanism of Amber Charkha." Indian Journal of Applied Research 3, no. 6 (October 1, 2011): 213–15. http://dx.doi.org/10.15373/2249555x/june2013/70.

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Warisman, Yesi, Arinda Lironika Suryana, and Zora Olivia. "The Effect of Belimbing Wuluh (Averrhoa Bilimbi L.) and Red Guava (Psidium Guajava L.) Extract on Fasting Blood Glucose Levels of Diabetic Wistar Rats Model." Journal of Agromedicine and Medical Sciences 5, no. 2 (June 29, 2019): 57. http://dx.doi.org/10.19184/ams.v5i2.12076.

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Diabetes mellitus is a metabolic disease with special characteristic which increased blood glucose level (hiperglicemic), its happens because of the abnormality of insulin secretion, insulin mechanisme or both of them. Belimbing wuluh and red guava extract can become alternative functional drink that contain rich of vitamin C to help controlling blood glucose level. The aimed of this study was to determined the effect of belimbing wuluh and red guava extract on blood glucose levels of Rattus novergicus strain Wistar diabetic model. This research was an true experimental study with a randomized post-test control group design. Twentyfour (24) male wistar strain rats weighing 200-250 grams, aged 2-3 months, were divided into 4 groups. The control group (K-) non-diabetic rats, the control group (K+) diabetic rats given standard diet, and the treatment group diabetic rats given standard diet and belimbing wuluh and red guava extract intervetion doses 10,7 ml/day (P1) and 21ml/day (P2). Measurement of pretest posttest fasting blood glucose levels was carried out using biolyzer. The data were analyzed by One Way Anova test. The results showed that there were significant differences in delta pretest and posttest fasting blood glucose levels between all groups. Blood glucose levels decreased at 55.6%. In conclusion, belimbing wuluh and red guava extract 21ml/day most effectively decreased fasting blood glucose levels in diabetic wistar rats moldel. Keywords: belimbing wuluh, blood glucose level, diabetes mellitus, red guava
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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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Tena Sánchez, Jordi. "La promoción de la virtud cívica mediante mecanismos de diseño institucional." Thémata Revista de Filosofía, no. 53 (2016): 107–18. http://dx.doi.org/10.12795/themata.2016.i53.05.

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Dissertations / Theses on the topic "Design de mechanisme"

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Baha, Alae. "Essays in microeconomic theory." Thesis, Toulouse 1, 2022. http://www.theses.fr/2022TOU10012.

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Cette thèse s’inscrit dans un programme de recherche qui étudie la conception de mécanismes optimaux dans des environnements où le processus de production, et donc l’intensité des asymétries d’information, est endogène. Il se compose de trois articles, chacun étudiant l’effet des choix de mécanismes ex-ante sur l’intensité des asymétries d’information ex-post ainsi que ses effets en terme d’optimalité du mécanisme choisi. Le premier article se consacre à l’étude de l’approvisionnement optimal dans un environnement dans lequel les agents prennent des décisions- d’investissement qui leur permettent de produire uniquement dans un état du monde inconnu ex-ante et a des applications dans l’approvisionnement en présence d’incertitude technologique telles que l’approvisionnement (ex-ante)en vaccins. Le deuxième article étudie les politiques de contrôle optimales dans un environnement dans lequel la capacité du moniteur à détecter la fraude/crime dépend à la fois de ses investissements passés et de ceux de l’agent et a des applications dans la cybersécurité, le trafic de drogue, le blanchiment d’argent, l’évasion fiscale et le dopage. Enfin, le troisième article étudie un problème de production dans lequel la productivité de l’agent dépend d’une allocation de ressources (ou de temps) non observable et trouve des applications en économie du travail
This dissertation is part of a research agenda which studies optimal mechanismdesign in environments in which the production process, an thus the intensityof the asymmetries of information, is endogenous. It consists of three papers,each which studies the effect of ex-ante mechanism choices on the ex-postintensity of the asymmetries of information and its implication in terms ofoptimal mechanisms.The first paper studies the optimal procurement in an environment inwhich agents make investment decisions that allow them to produce onlyin ex-ante unknown state of the world and has applications in procurementunder technology uncertainty such as the procurement of vaccines. Thesecond paper studies the optimal monitoring policies in an environment inwhich the monitor’s ability to detect misbehavior depends on both her andthe agent’s past investments and has applications in cyber security, drugsmuggling, money laundering tax evasion and doping. Finally, the third paperstudies a production problem in which the agent’s productivity depends onan unobservable resource (or time) allocation and has applications in laboreconomics
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Griebeler, Marcelo de Carvalho. "Teorema do envelope generalizado para espaços de tipos multidimensionais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26099.

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O principal objetivo desta dissertação é obter um Teorema do Envelope que permita mecanismos não diferenciáveis, preferências arbitrárias e que possa ser aplicado em modelos com múltiplos agentes. Nós alcançamos isto ao expandir a análise de Milgrom e Segal (2002), generalizando seus resultados para espaços de tipos multidimensionais. Dessa forma, continuamos permitindo que a regra de escolha (mecanismo) seja descontínua. Para obter nosso resultado, é necessário o uso do Teorema do Máximo de Berge e, consequentemente, devemos impor compacidade no conjunto de escolha. Inicialmente esta hipótese pode parecer forte, porém argumentamos que em aplicações _e muito improvável termos um conjunto de escolha aberto ou, principalmente, não limitado. Nós também identificamos condições para que a função valor seja absolutamente contínua e mostramos que sua representação integral também é válida para espaços de tipos multidimensionais. Inicialmente propomos uma generalização direta do resultado de Milgrom e Segal (2002), utilizando a hipótese de continuidade absoluta da função de utilidade do agente. Entretanto, esta exigência não possui muito significado econômico e é considerada pouco elegante por parte da literatura. Neste sentido, incorporamos uma hipótese adicional de diferenciabilidade da utilidade em todo o domínio que gera a mesma representação integral e possui uma maior interpretação econômica. Nossos resultados são, em geral, aplicados a modelos com múltiplos agentes, em especial Economia do Setor Público (provisão de bens públicos e taxação ótima) e teoria dos leilões.
The main objective of this dissertation is to obtain an Envelope Theorem that allows non-di erentiable mechanisms, arbitrary preferences, and that can be applied to models with multiple agents. We achieve that by expanding the analysis of Milgrom and Segal (2002) and generalizing their results to multidimensional type spaces. Thus, we continue allowing that the choice rule (mechanism) is discontinuous. For our result, it is necessary to use the Berge's Maximum Theorem and therefore we must impose compactness in the choice set. Initially this assumption may seem strong, but we argue that in applications there is an open or unbounded choice set is very unlikely. We also identify conditions for the value function is absolutely continuous and show that its integral representation is also valid for multidimensional type spaces. Firstly we propose a direct generalization of the Milgrom and Segal (2002)'s result, using the assumption of absolute continuity of the agent's utility function. However, this requirement does not have much economic interpretation and it is considered not very elegant in the literature. In this sense, we incorporate an additional assumption of di erentiability of the utility in all range that generates the same integral representation and it possesses a greater economic interpretation. Our results are generally applied to models with multiple agents, in particular Public Economics (public goods supply and optimal taxation) and auction theory.
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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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Perkins, David A. "Synthesis Techniques for Coupler-Driven Planar and Spherical Single Degree of Freedom Mechanisms." University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1317739251.

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Phelps, Stephen George. "Evolutionary Mechanism Design." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490710.

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The advent of large-scale distributed systems poses unique engineering challenges. In open systems such as the internet it is not possible to prescribe the behaviour of all of the components of the system in advance. Rather, we attempt to design infrastructure, such as network protocols, in such a way that the overall system is robust despite the fact that numerous arbitrary, non-certified, third-party components can connect to our system. Economists have long understood this issue, since it is analogous to the design of the rules governing auctions and other marketplaces, in which we attempt to achieve sociallydesirable outcomes despite the impossibility of prescribing the exact behaviour of the market participants, who may attempt to subvert the market for their own personal gain. This field is known as 'mechanism design': the science of designing rules of a game to achieve a specific outcome, even though each participant may be self-interested. Although it originated in economics, mechanism design has become an important foundation of multi-agent systems (MAS) research. In many scenarios mechanism design and auction theory yield clear-cut results; however, there are many situations in which the underlying assumptions of the theory are violated due to the messiness of the real-world. In this thesis I introduce an evolutionary methodology for mechanism design, which is able to incorporate arbitrary design objectives and domain assumptions, and I validate the methodology using empirical techniques.
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Postl, Peter. "Applied mechanism design." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405859.

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Gong, Haojue. "RESEARCH ON THE GAME MECHANISM OF EDUCATIONAL GAMES – THINK ABOUT HOW TO CHOOSE THE SUITABLE GAME MECHANISMS WHEN DESIGNING EDUCATIONAL GAMES." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20957.

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With the development of media technology and game evolution, games are endowed with multiple purposes and functions. Some scholars believe that the game is the supplement of the real world, which can affect the players' psychology and behaviour. Numerous studies show that games can make players accept challenges, overcome obstacles, arouse positive emotions and solve problems. Therefore, academia's research on games and related topics in learning has become increasingly popular. In response, different models have emerged to evaluate the design of active educational games.This research discusses how different game mechanisms affect players. Also, this study used a prototype game as output media to examine the impact of various game mechanisms on learning. The purpose of this study is to explore how to choose a more suitable game mechanism in the design of educational games. The research results include that some game mechanisms promote learning motivation and improve learning outcomes. At the same time, some game mechanisms have the risk of reducing learning motivation. Through these findings, the researcher of this study believes that educational games can bring positive influence and help to players' learning. However, how to choose a suitable game mechanism in the design of educational games is worthy of serious consideration for making design decisions.
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Doyle, Matthew Edward. "The Foundation for CADSPAM: Computer Aided Design of SPAtial Mechanisms." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/35730.

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This thesis presents the foundation of a computer program for the unified design of spatial mechanisms. The program will be capable of synthesizing any mechanism that can be described using an equivalent chain containing only revolute and prismatic joints. The supporting analysis routine will be general and will be able to analyze any lower pair mechanism using the iterative approach developed by Sheth and Uicker [1972]. Unlike precision point synthesis methods that allow only a limited number of positions to be specified, optimization will be employed to synthesize a wide variety of mechanisms. This approach will allow the user to interactively monitor and control objectives and constraints, which will yield practical solutions to realistic mechanism design problems. The creation of this program will provide practicing engineers with the capacity to design many previously intractable spatial mechanisms.
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Reinhardt, Markus. "Exploring the limits of incentive compatibility and allocative efficiency in complex economic environments." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-147728.

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In this dissertation auction formats are developed and discussed that focus on three specific economic environments. Regarding the impossibility results from mechanism design, the main task for the implementation of auction designs is to balance allocative efficiency and incentive compatibility – the main characteristics a mechanism should provide. Therefore, the dissertation investigates the limits of conceivable relaxations of allocative efficiency and incentive compatibility for complex settings such as double auctions, interdependent-valuation environments and electricity market designs. The overall aim is to carefully weigh up the advantages and disadvantages for either relaxing allocative efficiency or respectively incentive compatibility.
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Chen, Yan. "Design of structural mechanisms." Thesis, University of Oxford, 2003. http://ora.ox.ac.uk/objects/uuid:6423e5a6-5438-496a-835d-242fe1d5cd97.

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In this dissertation, we explore the possibilities of systematically constructing large structural mechanisms using existing spatial overconstrained linkages with only revolute joints as basic elements. The first part of the dissertation is devoted to structural mechanisms (networks) based on the Bennett linkage, a well-known spatial 4R linkage. This special linkage has been used as the basic element. A particular layout of the structures has been identified allowing unlimited extension of the network by repeating elements. As a result, a family of structural mechanisms has been found which form single-layer structural mechanisms. In general, these structures deploy into profiles of cylindrical surface. Meanwhile, two special cases of the single-layer structures have been extended to form multi-layer structures. In addition, according to the mathematical derivation, the problem of connecting two similar Bennett linkages into a mobile structure, which other researchers were unable to solve, has also been solved. A study into the existence of alternative forms of the Bennett linkage has also been done. The condition for the alternative forms to achieve the compact folding and maximum expansion has been derived. This work has resulted in the creation of the most effective deployable element based on the Bennett linkage. A simple method to build the Bennett linkage in its alternative form has been introduced and verified. The corresponding networks have been obtained following the similar layout of the original Bennett linkage. The second effort has been made to construct large overconstrained structural mechanisms using hybrid Bricard linkages as basic elements. The hybrid Bricard linkage is a special case of the Bricard linkage, which is overconstrained and with a single degree of mobility. Starting with the derivation of the compatibility condition and the study of its deployment behaviour, it has been found that for some particular twists, the hybrid Bricard linkage can be folded completely into a bundle and deployed to a flat triangular profile. Based on this linkage, a network of hybrid Bricard linkages has been produced. Furthermore, in-depth research into the deployment characteristics, including kinematic bifurcation and the alternative forms of the hybrid Bricard linkage, has also been conducted. The final part of the dissertation is a study into tiling techniques in order to develop a systematic approach for determining the layout of mobile assemblies. A general approach to constructing large structural mechanisms has been proposed, which can be divided into three steps: selection of suitable tilings, construction of overconstrained units and validation of compatibility. This approach has been successfully applied to the construction of the structural mechanisms based on Bennett linkages and hybrid Bricard linkages. Several possible configurations are discussed including those described previously. All of the novel structural mechanisms presented in this dissertation contain only revolute joints, have a single degree of mobility and are geometrically overconstrained. Research work reported in this dissertation could lead to substantial advancement in building large spatial deployable structures.
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Books on the topic "Design de mechanisme"

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Vohra, Rakesh, ed. Mechanism Design. Cambridge: Cambridge University Press, 2011. http://dx.doi.org/10.1017/ccol9781107004368.

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Institute, Spring Manufacturers. Encyclopedia of spring design. Oak Brook, IL: The Institute, 2000.

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Beran, Jaroslav, Martin Bílek, Monika Hejnova, and Petr Zabka, eds. Advances in Mechanisms Design. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5125-5.

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Zeghloul, Saïd, Med Amine Laribi, and Marc Arsicault, eds. Mechanism Design for Robotics. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75271-2.

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Luo, Zongwei, ed. Mechanism Design for Sustainability. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5995-4.

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Gasparetto, Alessandro, and Marco Ceccarelli, eds. Mechanism Design for Robotics. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00365-4.

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Yang, Ting-Li, Anxin Liu, Huiping Shen, LuBin Hang, Yufeng Luo, and Qiong Jin. Topology Design of Robot Mechanisms. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5532-4.

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N, Sandor George, ed. Mechanism design: Analysis and synthesis. 3rd ed. Upper Saddle River, N.J: Prentice Hall, 1997.

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Smith, S. T. Foundations of ultraprecision mechanism design. Montreux, Switzerland: Gordon and Breach Science Publishers, 1992.

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Beran, Jaroslav, Martin Bílek, Miroslav Václavík, and Petr Žabka, eds. Advances in Mechanism Design III. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-83594-1.

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Book chapters on the topic "Design de mechanisme"

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Youssef, Fady, and Sebastian Kassner. "Kinematic Design." In Springer Series on Touch and Haptic Systems, 267–307. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04536-3_8.

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AbstractOne aspect in haptic devices is the design of the kinematics. The kinematics of a mechanism is the key to implement and accomplish the design goals, like transmitting dynamic feedback in the form of forces or torques, or allowing a sufficient workspace for the user to interact with environment. This chapter introduces the steps of the kinematic design. The chapter consists of five main sections. The first section gives an overview on some basic definitions and the main types of mechanisms. In the second section, the first step in the design, defining the structure of the mechanism, is introduced. This is accompanied with an example. After choosing the most applicable structure for the desired application, the second step takes place, where the kinematic equations are solved. These equations are used to describe the relation between the operating point of the mechanism and the base at any point in time. Different approaches are used to solve those equations depending on the type of the mechanism used. The third and final step in the design process is introduced in the fourth section. This step contains the optimization process of the mechanism in order to achieve a desired operation of the mechanism. Last but not least, the importance of modeling and simulation is discussed in the last section.
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Marwala, Tshilidzi, and Evan Hurwitz. "Mechanism Design." In Artificial Intelligence and Economic Theory: Skynet in the Market, 111–24. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66104-9_10.

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Wang, Susheng. "Mechanism Design." In Microeconomic Theory, 363–403. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0041-7_11.

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Lavi, Ron. "Mechanism Design." In Computational Complexity, 1837–50. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-1800-9_119.

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Myerson, Roger B. "Mechanism Design." In The New Palgrave Dictionary of Economics, 8632–44. London: Palgrave Macmillan UK, 2018. http://dx.doi.org/10.1057/978-1-349-95189-5_2675.

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Myerson, Roger B. "Mechanism Design." In The New Palgrave Dictionary of Economics, 1–13. London: Palgrave Macmillan UK, 2008. http://dx.doi.org/10.1057/978-1-349-95121-5_2675-1.

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Lavi, Ron. "Mechanism Design." In Encyclopedia of Complexity and Systems Science, 5510–23. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-30440-3_327.

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Johari, Ramesh. "Mechanism Design." In Encyclopedia of Systems and Control, 712–15. London: Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5058-9_38.

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Johari, Ramesh. "Mechanism Design." In Encyclopedia of Systems and Control, 1–6. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5102-9_38-1.

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Johari, Ramesh. "Mechanism Design." In Encyclopedia of Systems and Control, 1–5. London: Springer London, 2019. http://dx.doi.org/10.1007/978-1-4471-5102-9_38-2.

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Conference papers on the topic "Design de mechanisme"

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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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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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Jensen, Brian D., and Larry L. Howell. "Identification of Compliant Pseudo-Rigid-Body Mechanism Configurations Resulting in Bistable Behavior." 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-14147.

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Abstract 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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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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Alqasimi, Ahmad, and Craig Lusk. "Design of Four-Bar-Mechanism Stability Using Over-Constraint." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59960.

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This paper presents a new concept and method to design mechanisms’ stability using over-constraint. The designs involve the use of parametric Computer-Aided Design (CAD) software to synthesize a mechanism’s geometry in order to achieve a design’s specific bistability requirements. This method ensures a stable position without the need of a hard-stop. There are two main initial design considerations that need to be met in this analysis. First, both (first and second) state of the mechanism should be chosen and should represent the mechanism’s desired stable positions. The first state is the position that the mechanism was manufactured or assembled at, whereas the second state is the position at which the mechanism is toggled to. The second consideration is the assumption that the magnitude of the joints’ torsional spring stiffness is small i.e. living hinges. The main idea is to attach a Potential Energy Element (PEE), such as a spring or a compliant link, to the four-bar mechanism such that it is unstretched in both stable positions and has to deform (stretch or compress) during the motion between stable states. This approach seems to allow the designer considerable freedom in amount of motion between stable states and in the amount of force required to toggle between stable states.
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Parkinson, Matthew B., Larry L. Howell, and Jordan J. Cox. "A Parametric Approach to the Optimization-Based Design of Compliant Mechanisms." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dac-3763.

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Abstract Several optimization-based strategies have been proposed for compliant mechanism design that do not rely on the experience or intuition of the designer. This paper demonstrates an optimization-based method wherein compliant mechanisms are modeled parametrically within an optimization and a finite element analysis package. Topological optimization is performed to minimize an objective function representing the fitness of the design. This methodology exploits the nonlinear nature of compliant mechanisms and augments optimization-based methods previously proposed. Using this method, constant-force mechanisms optimized for a displacement from 4% to 25% of the mechanism’s total length were predicted to remain within 3.58% of constant force. Results from the testing of fabricated mechanisms are: for 4–25% displacement, within 7.5% constant force; for 18–65% displacement, within 2.3%. Path generation mechanisms were designed with similarly encouraging results.
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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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Lim, Bokman, Frank C. Park, and Seungjin Yoo. "Minimum Vibration Mechanism Design via Convex Programming." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-50070.

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One means of designing reduced vibration mechanisms is to ensure that the mechanism’s natural frequency be sufficiently greater than the driving frequencies of the actuators. In this paper we consider the problem of determining a mechanism’s mass, inertial, and joint stiffness parameters so as to maximize the lowest natural frequency of the mechanism. We show that this leads to a convex programming problem, which is characterized by global optima that can be found with efficient interior point algorithms. Several case studies involving closed chain mechanisms and hydraulically actuated excavators demonstrate the viability of the design methodology.
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Opdahl, Patrick G., Brian D. Jensen, and Larry L. Howell. "An Investigation Into Compliant Bistable Mechanisms." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/mech-5914.

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Abstract This paper proposes a new class of bistable mechanisms: compliant bistable mechanisms. These mechanisms gain their bistable behavior from the energy stored in the flexible segments which deflect to allow mechanism motion. This approach integrates desired mechanism motion and energy storage to create bistable mechanisms with dramatically reduced part count compared to traditional mechanisms incorporating rigid links, joints, and springs. This paper briefly reviews bistable mechanism theory, introduces some additional bistable mechanism characteristics, and integrates this theory with compliant mechanism theory. The resulting theory of bistable compliant mechanisms is validated by measuring the force and motion characteristics of several test mechanisms and comparing them to predicted values.
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Reports on the topic "Design de mechanisme"

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Feigenbaum, Joan, Rahul Sami, and Scott Shenker. Mechanism Design for Policy Routing. Fort Belvoir, VA: Defense Technical Information Center, November 2003. http://dx.doi.org/10.21236/ada478748.

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Landis, Clark R. Mechanisms and Design in Homogeneous Catalysis. Office of Scientific and Technical Information (OSTI), May 2010. http://dx.doi.org/10.2172/979723.

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Gans, Joshua, and Richard Holden. Mechanism Design Approaches to Blockchain Consensus. Cambridge, MA: National Bureau of Economic Research, June 2022. http://dx.doi.org/10.3386/w30189.

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Lehtimaki, Susanna, Aisling Reidy, Kassim Nishtar, Sara Darehschori, Andrew Painter, and Nina Schwalbe. Independent Review and Investigation Mechanisms to Prevent Future Pandemics: A Proposed Way Forward. United Nations University International Institute for Global Health, April 2021. http://dx.doi.org/10.37941/rr/2021/1.

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The COVID-19 pandemic has created enormous challenges for national economies, livelihoods, and public services, including health systems. In January 2021, the World Health Organization proposed an international treaty on pandemics to strengthen the political commitment towards global pandemic preparedness, control, and response. The plan is to present a draft treaty to the World Health Assembly in May 2021. To inform the design of a support system for this treaty, we explored existing mechanisms for periodic reviews conducted either by peers or an external group as well as mechanisms for in-country investigations, conducted with or without country consent. Based on our review, we summarized key design principles requisite for review and investigation mechanisms and explain how these could be applied to pandemics preparedness, control, and response in global health. While there is no single global mechanism that could serve as a model in its own right, there is potential to combine aspects of existing mechanisms. A Universal Periodic Review design based on the model of human rights treaties with independent experts as the authorized monitoring body, if made obligatory, could support compliance with a new pandemic treaty. In terms of on-site investigations, the model by the Committee on Prevention of Torture could lend itself to treaty monitoring and outbreak investigations on short notice or unannounced. These mechanisms need to be put in place in accordance with several core interlinked design principles: compliance; accountability; independence; transparency and data sharing; speed; emphasis on capabilities; and incentives. The World Health Organization can incentivize and complement these efforts. It has an essential role in providing countries with technical support and tools to strengthen emergency preparedness and response capacities, including technical support for creating surveillance structures, integrating non-traditional data sources, creating data governance and data sharing standards, and conducting regular monitoring and assessment of preparedness and response capacities.
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Rybak-Akimova, Elena. Mechanism-Based Design of Green Oxidation Catalysts. Office of Scientific and Technical Information (OSTI), March 2015. http://dx.doi.org/10.2172/1172641.

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Greenberg, Kyle, Parag Pathak, and Tayfun Sönmez. Mechanism Design meets Priority Design: Redesigning the US Army's Branching Process. Cambridge, MA: National Bureau of Economic Research, June 2021. http://dx.doi.org/10.3386/w28911.

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Suo, Zhigang. Investigations on Degradation Mechanisms for Ferroelectric Actuator Design. Fort Belvoir, VA: Defense Technical Information Center, September 1998. http://dx.doi.org/10.21236/ada361484.

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Larsen, Bradley, and Anthony Lee Zhang. A Mechanism Design Approach to Identification and Estimation. Cambridge, MA: National Bureau of Economic Research, July 2018. http://dx.doi.org/10.3386/w24837.

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Lehtimaki, Susanna, Kassim Nishtar, Aisling Reidy, Sara Darehshori, Andrew Painter, and Nina Schwalbe. Independent Review and Investigation Mechanisms to Prevent Future Pandemics: A Proposed Way Forward. United Nations University International Institute for Global Health, May 2021. http://dx.doi.org/10.37941/pb-f/2021/2.

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Based on the proposal by the European Council, more than 25 heads of state and the World Health Organization (WHO) support development of an international treaty on pandemics, that planned to be negotiated under the auspices of WHO, will be presented to the World Health Assembly in May 2021. Given that the treaty alone is not enough to ensure compliance, triggers for a high-level political response is required. To this end, to inform the design of a support system, we explored institutional mechanismsi with a mandate to review compliance with key international agreements in their signatory countries and conduct independent country investigations in a manner that manages sovereign considerations. Based on our review, there is no single global mechanism that could serve as a model in its own right. There is, however, potential to combine aspects of existing mechanisms to support a strong, enforceable treaty. These aspects include: • Periodic review - based on the model of human rights treaties, with independent experts as the authorized monitoring body to ensure the independence. If made obligatory, the review could support compliance with the treaty. • On-site investigations - based on the model by the Committee on Prevention of Torture according to which visits cannot be blocked by state parties. • Non-negotiable design principles - including accountability; independence; transparency and data sharing; speed; emphasis on capabilities; and incentives. • Technical support - WHO can provide countries with technical assistance, tools, monitoring, and assessment to enhance emergency preparedness and response.
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Ganesh, Shriram, Maitreya Natu, Adarshpal Sethi, Rommie Hardy, and Richard Gopaul. Design Approaches for Stealthy Probing Mechanisms in Battlefield Networks. Fort Belvoir, VA: Defense Technical Information Center, September 2008. http://dx.doi.org/10.21236/ada487331.

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