Journal articles: '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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YE, Wei. "Design of Reconfigurable Parallel Mechanisms with Discontinuously Movable Mechanism." Journal of Mechanical Engineering 51, no. 13 (2015): 137. http://dx.doi.org/10.3901/jme.2015.13.137.

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Joshi, Anjali J., and Dr Jayant P. Modak. "Design And Development Of A Small Capacity Stone Crusher Mechanism." Indian Journal of Applied Research 3, no. 2 (October 1, 2011): 106–9. http://dx.doi.org/10.15373/2249555x/feb2013/36.

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Ab. Aziz, Muhammad Ridhwan. "Infaq Of Expertise For The Post Crisis Of Covid-19: Risk Taker Proposition." UMRAN - International Journal of Islamic and Civilizational Studies 8, no. 2 (June 29, 2021): 95–102. http://dx.doi.org/10.11113/umran2021.8n2.505.

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The economic risk of a pandemic such as crisis of Covid-19 is very distinct from the health risk. Since the economic and public health risks are distinct, the evaluation and design of policies to ameliorate them should be pursued separately. One of the measures to minimize the Covid-19 risk is through infaq mechanisme which has been mandated in Islam. Infaq is a kind of alms giving intended to assist the needs of a man in his daily life. The spirit of giving is promoted by Islam as a means to develop the ummah in the economic and social sector. Some Muslim classical jurists are of the view that the properties endowed or infaq may not necessarily be in physical or tangible forms, but they may be in intangible and various forms. In today’s world, our societies demand the contribution in wider forms including contribution in the form of skills and expertise from the professional experts. Infaq of professional expertise aims to utilize professional experts in order to fulfil those demands craved by the society in many fields such as medical, accounting, law, engineering and architecture. The objective of this case is to expose students on the benefit and potential of infaq of expertise. The purpose is not to disclose weaknesses nor the incompetency on any of the individual or organization, but to provide basis for academic discussion. The methodology of research used is qualitative method using case study approach with related to the Manual of Infaq and Waqf of Expertise. The general finding of this article shows that a good comprehension and application of the unique concept of Infaq of Expertise able to provide various benefits to many people.

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Yue, Wenchao, Ruijie Tang, Joei Simin Wong, and Hongliang Ren. "Deployable Tubular Mechanisms Integrated with Magnetic Anchoring and Guidance System." Actuators 11, no. 5 (April 28, 2022): 124. http://dx.doi.org/10.3390/act11050124.

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Deployable mechanism has received more attention in the medical field due to its simple structure, dexterity, and flexibility. Meanwhile, the advantages of the Magnetic Anchoring and Guidance System (MAGS) are further highlighted by the fact that the operators can remotely control the corresponding active and passive magnetic parts in vivo. Additionally, MAGS allows the untethered manipulation of intracorporeal devices. However, the conventional instruments in MAGS are normally rigid, compact, and less flexible. Therefore, to solve this problem, four novel deployable tubular mechanisms, Design 1 (Omega-shape mechanism), Design 2 (Fulcrum-shape mechanism), Design 3 (Archway-shape mechanism), and Design 4 (Scissor-shape mechanism) in this paper, are proposed integrated with MAGS to realize the laser steering capability. Firstly, this paper introduces the motion mechanism of the four designs and analyzes the motion characterization of each structure through simulation studies. Further, the prototypes of four designs are fabricated using tubular structures with embedded magnets. The actuation success rate, the workspace characterization, the force generation and the load capability of four mechanisms are tested and analyzed based on experiments. Then, the demonstration of direct laser steering via macro setup shows that the four mechanisms can realize the laser steering capability within the error of 0.6 cm. Finally, the feasibility of indirect laser steering via a macro-mini setup is proven. Therefore, such exploration demonstrates that the application of the deployable tubular mechanisms integrated with MAGS towards in vivo treatment is promising.

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Bergemann, Dirk, and Juuso Välimäki. "Dynamic Mechanism Design: An Introduction." Journal of Economic Literature 57, no. 2 (June 1, 2019): 235–74. http://dx.doi.org/10.1257/jel.20180892.

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We provide an introduction to the recent developments of dynamic mechanism design, with a primary focus on the quasilinear case. First, we describe socially optimal (or efficient) dynamic mechanisms. These mechanisms extend the well-known Vickrey– Clark–Groves and D’Aspremont–Gérard–Varet mechanisms to a dynamic environment. Second, we discuss revenue optimal mechanisms. We cover models of sequential screening and revenue-maximizing auctions with dynamically changing bidder types. We also discuss models of information management where the mechanism designer can control (at least partially) the stochastic process governing the agents’ types. Third, we consider models with changing populations of agents over time. After discussing related models with risk-averse agents and limited liability, we conclude with a number of open questions and challenges that remain for the theory of dynamic mechanism design. ( JEL D44, D81, D82)

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Kim, Charles J., Sridhar Kota, and Yong-Mo Moon. "An Instant Center Approach Toward the Conceptual Design of Compliant Mechanisms." Journal of Mechanical Design 128, no. 3 (July 29, 2005): 542–50. http://dx.doi.org/10.1115/1.2181992.

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As with conventional mechanisms, the conceptual design of compliant mechanisms is a blend of art and science. It is generally performed using one of two methods: topology optimization or the pseudo-rigid-body model. In this paper, we present a new conceptual design methodology which utilizes a building block approach for compliant mechanisms performing displacement amplification/attenuation. This approach provides an interactive, intuitive, and systematic methodology for generating initial compliant mechanism designs. The instant center is used as a tool to construct the building blocks. The compliant four-bar building block and the compliant dyad building block are presented as base mechanisms for the conceptual design. It is found that it is always possible to obtain a solution for the geometric advantage problem with an appropriate combination of these building blocks. In a building block synthesis, a problem is first evaluated to determine if any known building blocks can satisfy the design specifications. If there are none, the problem is decomposed to a number of sub-problems which may be solved with the building blocks. In this paper, the problem is decomposed by selecting a point in the design space where the output of the first building block coincides with the second building block. Two quantities are presented as tools to aid in the determination of the mechanism's geometry – (i) an index relating the geometric advantage of individual building blocks to the target geometric advantage and (ii) the error in the geometric advantage predicted by instant centers compared to the calculated value from FEA. These quantities guide the user in the selection of the location of nodes of the mechanism. Determination of specific cross-sectional size is reserved for subsequent optimization. An example problem is provided to demonstrate the methodology's capacity to obtain good initial designs in a straightforward manner. A size and geometry optimization is performed to demonstrate the viability of the design.

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Nishimura, Yasuhiro, Geunho Lee, and Nak Young Chong. "Design and Analysis of One-Time-Use Sensor Node Leaping Mechanism." Abstracts of the international conference on advanced mechatronics : toward evolutionary fusion of IT and mechatronics : ICAM 2010.5 (2010): 219–24. http://dx.doi.org/10.1299/jsmeicam.2010.5.219.

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Wada, Masayoshi, and Fujio Kameda. "A Joystick Car Drive System : Design of the Pedal Actuating Mechanism." Abstracts of the international conference on advanced mechatronics : toward evolutionary fusion of IT and mechatronics : ICAM 2010.5 (2010): 750–55. http://dx.doi.org/10.1299/jsmeicam.2010.5.750.

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Doval, Laura, and Vasiliki Skreta. "Mechanism Design With Limited Commitment." Econometrica 90, no. 4 (2022): 1463–500. http://dx.doi.org/10.3982/ecta16846.

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We develop a tool akin to the revelation principle for dynamic mechanism‐selection games in which the designer can only commit to short‐term mechanisms. We identify a canonical class of mechanisms rich enough to replicate the outcomes of any equilibrium in a mechanism‐selection game between an uninformed designer and a privately informed agent. A cornerstone of our methodology is the idea that a mechanism should encode not only the rules that determine the allocation, but also the information the designer obtains from the interaction with the agent. Therefore, how much the designer learns, which is the key tension in design with limited commitment, becomes an explicit part of the design. Our result simplifies the search for the designer‐optimal outcome by reducing the agent's behavior to a series of participation, truth telling, and Bayes' plausibility constraints the mechanisms must satisfy.

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ROH, Se-gon, Yasuhiro TAGUCHI, Yusuke NISHIDA, Ryusuke YAMAGUCHI, Yasushi FUKUDA, Minoru YOSHIDA, and Shingo HIROSE. "2A2-L11 Development of Portable 3D Earthquake Simulator : Design of Mechanism and Preliminary Experiments(Mobile Robot with Special Mechanism)." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2011 (2011): _2A2—L11_1—_2A2—L11_3. http://dx.doi.org/10.1299/jsmermd.2011._2a2-l11_1.

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Abdulkadiroğlu, Atila, and Tayfun Sönmez. "School Choice: A Mechanism Design Approach." American Economic Review 93, no. 3 (May 1, 2003): 729–47. http://dx.doi.org/10.1257/000282803322157061.

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A central issue in school choice is the design of a student assignment mechanism. Education literature provides guidance for the design of such mechanisms but does not offer specific mechanisms. The flaws in the existing school choice plans result in appeals by unsatisfied parents. We formulate the school choice problem as a mechanism design problem and analyze some of the existing school choice plans including those in Boston, Columbus, Minneapolis, and Seattle. We show that these existing plans have serious shortcomings, and offer two alternative mechanisms each of which may provide a practical solution to some critical school choice issues.

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Chen, Jun, Yan Li Xu, and Dan Liu. "Parameterized Model Design and Extension for Principal-Agent Incentive Mechanism." Applied Mechanics and Materials 55-57 (May 2011): 1869–74. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.1869.

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Parameterized model of principal-agent incentive mechanism has been designed through mathematical analysis in this paper. The analysis of monitoring mechanism is introduced in the principal-agent incentive mechanism, which extends the theoretical framework of incentives. The results show that: monitoring mechanisms and incentive mechanisms are relevant and the interaction between them has a substitution effect. They can encourage or induce an agent to work hard. Therefore, incentive mechanisms and monitoring mechanisms should be taken into account in the process of compensation contract formation. The introduction of monitoring mechanisms not only has some innovations in theory, but also has great value in practice.

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Fan Junjie, 范俊杰, 李富强 Li Fuqiang, 蔡伟军 Cai Weijun, 李庆林 Li Qinglin, 张占东 Zhang Zhandong, and 丁世涛 Ding Shitao. "长线阵大负载焦平面调焦机构设计." Infrared and Laser Engineering 50, no. 11 (2021): 20210270. http://dx.doi.org/10.3788/irla20210270.

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Krishnan, G., C. Kim, and S. Kota. "Building block method: a bottom-up modular synthesis methodology for distributed compliant mechanisms." Mechanical Sciences 3, no. 1 (March 28, 2012): 15–23. http://dx.doi.org/10.5194/ms-3-15-2012.

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Abstract. Synthesizing topologies of compliant mechanisms are based on rigid-link kinematic designs or completely automated optimization techniques. These designs yield mechanisms that match the kinematic specifications as a whole, but seldom yield user insight on how each constituent member contributes towards the overall mechanism performance. This paper reviews recent developments in building block based design of compliant mechanisms. A key aspect of such a methodology is formulating a representation of compliance at a (i) single unique point of interest in terms of geometric quantities such as ellipses and vectors, and (ii) relative compliance between distinct input(s) and output(s) in terms of load flow. This geometric representation provides a direct mapping between the mechanism geometry and their behavior, and is used to characterize simple deformable members that form a library of building blocks. The design space spanned by the building block library guides the decomposition of a given problem specification into tractable sub-problems that can be each solved from an entry in the library. The effectiveness of this geometric representation aids user insight in design, and enables discovery of trends and guidelines to obtain practical conceptual designs.

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Lin, Jian Liang, and Hong Sen Yan. "Historical Development of Reconstruction Designs of Antikythera Mechanism." Applied Mechanics and Materials 163 (April 2012): 1–6. http://dx.doi.org/10.4028/www.scientific.net/amm.163.1.

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Antikythera mechanism is an ancient Greece machine excavated in 1900. The damaged remains and ingenious mechanical structure resulted in mans thirst to decode this mechanism. This paper reviews the historical development regarding reconstruction designs of Antikythera mechanism. The origin, the recovering process and the related historical records are introduced first. Available reconstruction designs, which are classified into the orientation of mechanism, the decoding of modern technology including the appearance, the functions of the exterior dials and the interior structure, other research and the authors work are presented. Then, based on the viewpoint of mechanisms, the mechanism analysis of one feasible reconstruction design with the complete interior structure, by the authors, is presented. This new design to generate all known output functions also provides a possible embryo of Antikythera mechanism.

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ÖZGÜN, CAN, and ABDULLA GABİL. "Design of a new rotary dobby mechanism." Industria Textila 69, no. 06 (January 1, 2019): 429–33. http://dx.doi.org/10.35530/it.069.06.1484.

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Special cam mechanisms which require advanced technology are used in the drive mechanism of nowadays rotary dobbies. Electromagnets are generally preferred in the selection mechanisms which increase the cost of production and make the maintenance more difficult. This work aims to design a new rotary dobby different from the other dobbies. First of all, the design and synthesis of a new drive mechanism with eight members, equal and double standby at 180° oscillating motion was developed. The results of the research revealed that both the theoretical and the experimental values of the waiting angles of drive mechanism are compatible with each other. Thus, it has been proposed that designed mechanism can be used instead of the special cams mechanisms in the rotary dobbies. Pneumatic pistons and locks have been used in the selection mechanism of rotating dobby developed in the study. During the performence tests, it has been observed that the pneumatic piston and locks can be used instead of the electromagnets by providing that they work in harmony with each other. As a conclusion, when the working performance of dobby was observed, it was confirmed that dobby worked with a high performance and durably with all of its mechanisms. Additionally the shedding process was precisely carried out. Finally a new rotary dobby which was easy to construct with low cost has been designed and produced.

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Yu, Zhiwei, Yifan Zeng, and Ce Guo. "Mechanical Design and Performance Analysis of a Weevil-Inspired Jumping Mechanism." Machines 10, no. 3 (February 22, 2022): 161. http://dx.doi.org/10.3390/machines10030161.

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Jumping mechanisms constitute an important means of resolution in applications such as crossing uneven terrain and space exploration. However, the traditional design mainly uses engineering design thinking, but seldom studies the structural characteristics of organisms themselves and lacks biomimetic research basis, which leads to the difference between jumping mechanism and biological structure and its jumping ability. On the other hand, it lacks in-depth study on biological jumping mechanism from the view of engineering. Weevil has excellent jumping performance, and its key jumper structure is specially designed by biologist. To investigate the motion mechanism and working mechanism of the jumping mechanisms, this paper takes the weevil as the bionic object, and designs a weevil-inspired jumping mechanism. A miniature prototype is designed to reproduce weevil’s jumping mechanism with its working principle and anatomical structure to verify how weevil’s jumping mechanisms work, and turns out to perform well at jumping height. This paper is presented the anatomical structure and working principle of the weevil jumping mechanism, followed by explanation and analysis of its kinematics and dynamics, then performing virtual prototype simulations to compare different design schemes, with results guiding the parameter optimization and subjecting a prototype machine into a height test. In comparisons among existing jumping mechanisms whose jumping method is bio-inspired, the present design, which weighs 44.7 g and can jump to a maximum height of 2 m. The present research establishes a biologically inspired working principle and provides a new practical archetype in biologically inspired studies.

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Li, Temei, and Shahram Payandeh. "Design of spherical parallel mechanisms for application to laparoscopic surgery." Robotica 20, no. 2 (March 2002): 133–38. http://dx.doi.org/10.1017/s0263574701003873.

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This paper addresses an optimal study of workspace for spherical parallel mechanism for laparoscopic surgery. The spherical parallel manipulator has been selected because of its characteristics. Two designs have been studied for maximizing their workspaces; a haptic device, as part of training system, and a laparoscope holding mechanism. The laparoscope holding mechanism has to satisfy additional constraints by minimizing the occupied space above the patient. The objective is to solve design problem to offer the maximal workspace for such mechanisms. The design of a haptic interface and the laparoscope holding mechanism based on the optimal parameters are presented. This paper presents a Genetic Algorithm (GA) approach for selecting optimal design parameters for maximizing workspace of spherical parallel mechanism.

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Chen, Dar-Zen, and Wei-Ming Pai. "A Methodology for Conceptual Design of Mechanisms by Parsing Design Specifications." Journal of Mechanical Design 127, no. 6 (March 8, 2005): 1039–44. http://dx.doi.org/10.1115/1.2044767.

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In this paper, design specifications for the conceptual design of mechanisms are parsed into three coherent categories: functional requirements, structural requirements, and design constraints. Based on functional requirements, the functioning kinematic chain of a mechanism can be constructed by connecting the functioning links accordingly. From structural requirements, admissible kinematic structures are searched from the existing atlases of kinematic structures. Those admissible kinematic structures, which comprise at least one segment with the same characteristics of the functioning kinematic chain, are identified as compatible kinematic structures. Thus, feasible mechanisms that fulfill design specifications can be yielded by labeling joints in the compatible kinematic structures subject to design constraints. With this methodology, classified design specifications are used to guide designer through various stages of the conceptual design process in a systematic manner. The creation of the variable-stroke engine mechanism [Freudenstein, F., Maki, E. R., 1983, “Development of an Optimum Variable-Stroke Internal-Combustion Engine Mechanism From the Viewpoint of Kinematic Structure,” ASME J. Mech., Trans., Automat., Des., Vol. 105, pp. 259–267] is used as an illustrative example.

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Guo, Mingyu, and Vincent Conitzer. "Computationally Feasible Automated Mechanism Design: General Approach and Case Studies." Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 5, 2010): 1676–79. http://dx.doi.org/10.1609/aaai.v24i1.7708.

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In many multiagent settings, a decision must be made based on the preferences of multiple agents, and agents may lie about their preferences if this is to their benefit. In mechanism design, the goal is to design procedures (mechanisms) for making the decision that work in spite of such strategic behavior, usually by making untruthful behavior suboptimal. In automated mechanism design, the idea is to computationally search through the space of feasible mechanisms, rather than to design them analytically by hand. Unfortunately, the most straightforward approach to automated mechanism design does not scale to large instances, because it requires searching over a very large space of possible functions. In this paper, we describe an approach to automated mechanism design that is computationally feasible. Instead of optimizing over all feasible mechanisms, we carefully choose a parameterized subfamily of mechanisms. Then we optimize over mechanisms within this family, and analyze whether and to what extent the resulting mechanism is suboptimal outside the subfamily. We demonstrate the usefulness of our approach with two case studies.

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Hartline, Jason D. "Approximation in Mechanism Design." American Economic Review 102, no. 3 (May 1, 2012): 330–36. http://dx.doi.org/10.1257/aer.102.3.330.

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This paper considers three challenge areas for mechanism design and describes the role approximation plays in resolving them. Challenge 1: optimal mechanisms are finely tuned to precise details of the distribution on agent preferences. Challenge 2: in environments with multi-dimensional agent preferences economic analysis has failed to provide general characterizations optimal mechanisms. Challenge 3: optimal mechanisms are parameterized by unrealistic knowledge of the distribution of agents' private preferences. This paper surveys positive resolutions to these challenges with emphasis on basic techniques and their relevance to theory and practice.

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Wu, Yi Chang, Li An Chen, and Tze Cheng Wu. "Design of 3-Speed Bicycle Transmission Hubs." Applied Mechanics and Materials 764-765 (May 2015): 228–32. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.228.

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This paper presents the embodiment designs of 3-speed transmission hubs which consist of basic planetary gear mechanisms and gear-shifting control mechanisms. Two feasible clutching sequence tables are synthesized by analyzing the kinematic structure of the gear mechanism. A mechanical control mechanism is used to control the engagement or disengagement of each clutch to guide the power flow from the rear sprocket via the gear mechanism to the hub shell. The power transmission path at each gear stage is further checked to verify the validity of the transmission hub. The embodiment designs of two 3-speed transmission hubs are presented.

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Stǎnǎşel, Iulian, Florin Blaga, and Traian Buidoş. "Computer Aided Design of Classic External Geneva Mechanism." Advanced Materials Research 1036 (October 2014): 662–67. http://dx.doi.org/10.4028/www.scientific.net/amr.1036.662.

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Geneva mechanism is used as a mechanism for transforming rotary motion into intermittent motion and is able to achieve a precise movement and its lock, which makes it usable in many areas, particularly in timer devices, measurement devices, feed mechanisms, positioning mechanisms, pick-up and transport machinery, textile machinery etc. The studied literature showed that, although it has long been known, this mechanism is still interesting for contemporary researchers. The present paper proposes a method of synthesis and a computer-aided kinematic and dynamic analysis for this mechanism. Based on input data, it was developed a computer program that computes the dimensions of components of Geneva mechanism and determines velocity acceleration and displacement of Geneva wheel. The dimensional calculated data were also used to obtain 3D model of the mechanism.

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Ceccarelli, Marco, and Alessandro Gasparetto. "Mechanism Design for Robotics." Robotics 8, no. 2 (April 19, 2019): 30. http://dx.doi.org/10.3390/robotics8020030.

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MEDER 2018, the IFToMM International Symposium on Mechanism Design for Robotics, was the fourth event of a series that was started in 2010 as a specific conference activity on mechanisms for robots [...]

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Wang, Chengyun, Feng Tian, Shanjie Zhao, Guansiwei Shang, Yuteng Ma, and Dawei Chen. "Design of Monitoring PTZ with High Scalability." Frontiers of Mechatronical Engineering 2, no. 1 (May 28, 2020): 13. http://dx.doi.org/10.18282/fme.v2i1.839.

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<p>Provided a design scheme of a lifting PTZ with high-scalability for detecting search and rescue robots based on the analysis and reference o f various lifting mechanisms at home and abroad. It proposed a rigid-flexible dual-property automatic lifting mechanism transmission scheme which adopt s a roll-up spring as a supporting mechanism, a gear and a sprocket as a transmission mechanism, and a telescopic rod as an auxiliary supporting mechanism, which provides a new solution for the disadvantages of the traditional lifting mechanisms with large original volume and poor telescopic performance. Through the actual test, the mechanism can raise to the target stroke of 2 meters in 60s smoothly and widen the field of view of the image capturing device effectively based on the detection and rescue robot, which improves the ability of passing the narrow space and rescuing obviously.</p>

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Hsieh, Long-Chang, Tzu-Hsia Chen, Po-Cheng Lai, and Sheng-wen Zheng. "Optimal design on Watt-chain double-toggle mold clamping mechanism for injection molding machine." Science Progress 104, no. 3_suppl (July 2021): 003685042110414. http://dx.doi.org/10.1177/00368504211041488.

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Introduction The mode clamping mechanism is the most important part of forming section for the plastic injection molding machine. If this mechanism has double-toggle effects at the close position, it will get a larger clamping force and have higher safety. This study focuses on the optimal design of the Watt-chain mechanism with double-toggle effects at the close position. Methods The Watt-chain double-toggle mechanism is chosen to be the mold clamping mechanism by referring to the existing patents. Then, the kinematic characteristics of the Watt-chain double-toggle mechanism are analyzed by the vector loop method. Finally, based on the kinematic requirements and the proposed optimal design process according to the objective function, the optimal design on Watt-chain double-toggle mechanism is accomplished in this study. Results This study proposes an optimal design process on Watt-chain double-toggle mold clamping mechanism. By following the optimal design process, the optimal Watt-chain double-toggle mold clamping mechanism has a maximum acceleration 3418 mm/s2 ( amax = 3418 mm/s2) and a force ratio is 2.24 ( Fin/ Fout = 2.24). Discussion According to the studies on the optimal designs of mechanisms, the optimal Watt-chain double-toggle mechanism, which is better than the multiple-joint double-toggle mold clamping mechanism in the existing patent by reducing 19.5% of acceleration and 30% of a driving force, is proposed. The results of this study could be the design reference in engineering when designing mold clamping mechanisms for plastic injection molding machines.

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Otomori, M., T. Yamada, K. Izui, and S. Nishiwaki. "Level set-based topology optimisation of a compliant mechanism design using mathematical programming." Mechanical Sciences 2, no. 1 (May 10, 2011): 91–98. http://dx.doi.org/10.5194/ms-2-91-2011.

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Abstract. We propose a structural optimisation method, based on the level set method and using mathematical programming such as the method of moving asymptotes (MMA), which we apply to the design of compliant mechanisms. A compliant mechanism is a monolithic joint-free mechanism designed to be flexible to obtain a specified motion. In the design of compliant mechanisms, several requirements such as the direction of the deformation and stress concentrations must be considered to obtain the specified mechanical function. Topology optimisation, the most flexible type of structural optimisation, has been successfully used as a design optimisation method for compliant mechanisms, but the utility of topology optimisation results is often spoiled by a plethora of impractical designs such as structures containing grayscale areas. Level set-based topology optimisation methods are immune to the problem of grayscales since the boundaries of the optimal configuration are implicitly represented using the level set function. The proposed method updates the level set function using mathematical programming to facilitate the treatment of constraint functionals. To verify its capability, we apply our method to compliant mechanism design problems that include displacement constraints and stress constraints.

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Valdivia y Alvarado, Pablo, and Kamal Youcef-Toumi. "Design of Machines With Compliant Bodies for Biomimetic Locomotion in Liquid Environments." Journal of Dynamic Systems, Measurement, and Control 128, no. 1 (September 19, 2005): 3–13. http://dx.doi.org/10.1115/1.2168476.

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The aim of this work is to investigate alternative designs for machines intended for biomimetic locomotion in liquid environments. For this, structural compliance instead of discrete assemblies is used to achieve desired mechanism kinematics. We propose two models that describe the dynamics of special compliant mechanisms that can be used to achieve biomimetic locomotion in liquid environments. In addition, we describe the use of analytical solutions for mechanism design. Prototypes that implement the proposed compliant mechanisms are presented and their performance is measured by comparing their kinematic behavior and ultimate locomotion performance with the ones of real fish. This study shows that simpler, more robust mechanisms, as the ones described in this paper, can display comparable performance to existing designs.

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Narita, Yusuke. "A Theory of Quasi-Experimental Evaluation of School Quality." Management Science 67, no. 8 (August 2021): 4982–5010. http://dx.doi.org/10.1287/mnsc.2020.3742.

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Many centralized school admissions systems use lotteries to ration limited seats at oversubscribed schools. The resulting random assignment is used by empirical researchers to identify the effects of schools on outcomes like test scores. I first find that the two most popular empirical research designs may not successfully extract a random assignment of applicants to schools. When are the research designs able to overcome this problem? I show the following main results for a class of data-generating mechanisms containing those used in practice: The first-choice research design extracts a random assignment under a mechanism if the mechanism is strategy-proof for schools. In contrast, the other qualification instrument research design does not necessarily extract a random assignment under any mechanism. The former research design is therefore more compelling than the latter. Many applications of the two research designs need some implicit assumption, such as large-sample approximately random assignment, to justify their empirical strategy. This paper was accepted by Yan Chen, decision analysis.

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Omuro, Takeshi, and Toshio Morita. "Movable Structure Design by Hinge Relocation Using Singular Configuration of Spatial Quadric Mechanism." Abstracts of the international conference on advanced mechatronics : toward evolutionary fusion of IT and mechatronics : ICAM 2010.5 (2010): 669–74. http://dx.doi.org/10.1299/jsmeicam.2010.5.669.

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Yang, Yunsik, and Euysik Jeon. "3A17 Design on the Driving Mechanism for Optimization in a Sinking Rear Seat." Proceedings of the Symposium on the Motion and Vibration Control 2010 (2010): _3A17–1_—_3A17–13_. http://dx.doi.org/10.1299/jsmemovic.2010._3a17-1_.

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Majid, Tuba, and Bruce W. Jo. "Status and Challenges on Design and Implementation of Camber Morphing Mechanisms." International Journal of Aerospace Engineering 2021 (December 14, 2021): 1–14. http://dx.doi.org/10.1155/2021/6399937.

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This paper presents state-of-the-art technologies of camber morphing mechanisms from the perspectives of design and implementation. Wing morphing technologies are aimed at making the aircraft more energy or aerodynamically efficient during flight by actively adjusting the wing shape, but their mechanism designs and implementation aspects are often overlooked from practical sense in many technical articles. Thus, it is of our interest that we thoroughly investigate morphing mechanisms and their nature of design principles and methodologies from the implementation and test flight aspects, navigate the trends, and evaluate progress for researchers’ methodology selection that possibly turns to design and build stages. This paper categorizes the camber morphing mechanisms from a wide collection of literature on morphing wings and their mechanisms, and the defined classifications are based on mechanism’s design features and synthesis methodology, i.e., by the tools and methods used to solve the design problem. The categories are (1) structure-based, (2) material-based, and (3) hybrid. Most of the structure-based camber morphing mechanisms have distinctive structural features; however, the material-based camber morphing mechanisms make use of material properties and tools to enhance the elastic nature of its structures. Lastly, the hybrid morphing mechanisms are a combination of both the aforementioned categories. In summary, this review provides researchers in the field of morphing mechanisms and wings with choices of materials, actuators, internal and external structure design for wings, and overarching process and design methodologies for implementation with futuristic and practical aspects of flight performance and applications. Moreover, through this critical review of morphing mechanism, selective design criteria for appropriate morphing mechanisms are discussed.

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Rahwan, Iyad, and Kate Larson. "Logical mechanism design." Knowledge Engineering Review 26, no. 1 (February 7, 2011): 61–69. http://dx.doi.org/10.1017/s0269888910000421.

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AbstractGame theory is becoming central to the design and analysis of computational mechanisms in which multiple entities interact strategically. The tools of mechanism design are used extensively to engineer incentives for truth revelation into resource allocation (e.g. combinatorial auctions) and preference aggregation protocols (e.g. voting). We argue that mechanism design can also be useful in the design of logical inference procedures. In particular, it can help us understand and engineer inference procedures when knowledge is distributed among self-interested agents. We set a research agenda for this emerging area, and point to some early research efforts.

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Gorokh, Artur, Siddhartha Banerjee, and Krishnamurthy Iyer. "From Monetary to Nonmonetary Mechanism Design via Artificial Currencies." Mathematics of Operations Research 46, no. 3 (August 2021): 835–55. http://dx.doi.org/10.1287/moor.2020.1098.

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Nonmonetary mechanisms for repeated allocation and decision making are gaining widespread use in many real-world settings. Our aim in this work is to study the performance and incentive properties of simple mechanisms based on artificial currencies in such settings. To this end, we make the following contributions: For a general allocation setting, we provide two black-box approaches to convert any one-shot monetary mechanism to a dynamic nonmonetary mechanism using an artificial currency that simultaneously guarantees vanishing gains from nontruthful reporting over time and vanishing losses in performance. The two mechanisms trade off between their applicability and their computational and informational requirements. Furthermore, for settings with two agents, we show that a particular artificial currency mechanism also results in a vanishing price of anarchy.

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Yan, H.-S., and C.-C. Yeh. "Integrated kinematic and dynamic designs for variable-speed plate cam mechanisms." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 1 (June 11, 2010): 194–203. http://dx.doi.org/10.1243/09544062jmes2321.

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This work presents a systematic approach to improve the kinematic and dynamic characteristics of plate cam mechanisms by using the Bezier curve as the input speed trajectory. The analytical models of kinematic and dynamic designs for a variable-speed plate cam mechanism are derived first. Speed trajectories of the cam are obtained by employing the Bezier curve. Then, an approach to integrate kinematic and dynamic designs for motion adaptation and to reduce the input torque at the same time based on multi-objective optimization is proposed. Two examples are provided for the design models to illustrate the design process. Finally, an experimental set-up is established, and the data of related characteristics is measured to verify the proposed design for variable-speed plate cam mechanisms.

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Gotlih, Karl, and Inge Troch. "Base invariance of the manipulability index." Robotica 22, no. 4 (August 2004): 455–62. http://dx.doi.org/10.1017/s0263574704000220.

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The manipulability index suggested by Yoshikava is an important tool for the design of mechanisms and their control. It represents a quantitative measure of the functionality and the ability for realizing some tasks or groups of tasks. This index is some kind of performance measure and should be taken into consideration in the design phase of a mechanism and also in the design of control algorithms.In this paper two important properties of the manipulability index are investigated. The first part of the present work demonstrates that manipulability of a mechanism is independent of task space coordinates. In the second part, a proof of the independency of the manipulability index on the first DOF is given.This invariance is important for simplification of the mechanism's Jacobian matrix and gives excellent insight into the dependences of configuration space coordinates on this index. Moreover, it proves that the manipulability index is determined only by relative positions of the mechanism itself and by the mechanism's geometry.Finally, the properties of the manipulability index are illustrated by some examples for fundamental open kinematical chain structures.

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Kolmar, Martin. "Mechanism Design." WiSt - Wirtschaftswissenschaftliches Studium 37, no. 1 (2008): 41–47. http://dx.doi.org/10.15358/0340-1650-2008-1-41.

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Hsu, Meng Hui, Hsueh Yu Chen, Ting Sheng Weng, and Feng Chi Liu. "Topology Structure Design of 12 Flapping-Wing Mechanisms." Advanced Materials Research 328-330 (September 2011): 887–91. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.887.

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People used the Micro Air Vehicles to patrol the military activity or explore the danger region.The important parts of Micro Air Vehicles are the flapping-wing mechanisms those can simulate the wing-motion of flying being.Hence this work is to present a systematic approach for designing new flapping-wing mechanisms with one degree of freedom that can simulate the wing-motion of long ear bats and insects.First,we analyze the topological structure and motion characteristics of existed flapping mechanisms.Then, the design criteria of the topological structure are described.Based on the design criteria of topology, the methodology of mechanism design is applied to synthesize new flapping-wing mechanisms. Finally, this research of the provide method can obtain 12 new flapping -wing mechanisms and one prototype of a flying insect mechanism.

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Arunkumar, G., and P. S. S. Srinivasan. "Design of displacement amplifying compliant mechanisms with integrated strain actuator using topology optimization." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 220, no. 8 (August 1, 2006): 1219–28. http://dx.doi.org/10.1243/09544062jmes261.

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Compliant mechanisms are the focus of active research because of the stability, robustness, and ease of manufacturing endowed by their unitized construction. However, despite significant advances in the development of systematic design techniques for these mechanisms, currently compliant mechanisms are not capable of performing certain kinematic tasks that rigid body mechanisms can readily perform. This work explores the various advantages of the compliant mechanism and some of the difficulties in the design of the compliant mechanisms, and designing a compliant mechanism for displacement amplification of piezoelectric actuator is developed using a topological optimization approach. The overall stroke amplification of geometrical advantage of the mechanism and overall mechanical efficiency of the mechanism are considered as objective functions. The maximization of these objectives is accomplished using two different solution methods: a sequential linear programming and an optimality criteria method.

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Gong, DuHyun, DaWoon Lee, SangJoon Shin, and SangYong Kim. "String-based flapping mechanism and modularized trailing edge control system for insect-type FWMAV." International Journal of Micro Air Vehicles 11 (January 2019): 175682931984254. http://dx.doi.org/10.1177/1756829319842547.

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This paper presents the design process and experimental results of a brand new flapping and trailing edge control mechanism for a flapping wing micro air vehicle. The flapping mechanism, whose main components are fabricated from string, is suggested and optimized further by a modified pattern search method. The trailing edge control mechanisms for pitching and rolling moments are designed to be attached onto the present flapping mechanism in a modularized fashion. Prototypes of both mechanisms are fabricated and experimentally tested in order to examine the feasibility of the designs. It is expected that the present flapping mechanism will generate enough lift for the total weight of the vehicle. The present control mechanism is found to be able to supply sufficient control moment.

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Journal articles on the topic 'Design de mechanisme'

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