Relevant bibliographies by topics / Cams shape design

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

Academic literature on the topic 'Cams shape design'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Cams shape design"

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Buj-Corral, Irene, Enrique Zayas-Figueras, and Àngels Montaña-Faiget. "Comparative Study of Flank Cams Manufactured by WEDM and Milling Processes." Metals 10, no. 9 (August 27, 2020): 1159. http://dx.doi.org/10.3390/met10091159.

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Cam-follower mechanisms are usually employed in different machines, like combustion engines, sewing machines, machine tools, etc. In the present paper, the option to manufacture cams utilizing wire electrical discharge machining (WEDM) has been considered. For this, surface roughness and shape error of cam profiles manufactured by the processes of milling and wire electrical discharge machining (WEDM) are presented. The methodology used covers different stages: design, prototyping, manufacturing, and measurement of the cams. As a reference, a cam-follower mechanism from a motorcycle internal combustion engine has been used. A reverse engineering process has been performed to determine the geometrical parameters of the mechanism, which are used for the synthesis of the profile of the cam and its subsequent design. The manufacturing process of the cams has been assisted by CAD-CAM (Computer Assisted Drawing-Computer Assisted Manufacturing) software. Using fused filament fabrication (FFF), a physical prototype of the cam has been manufactured, in order to validate the goodness of the design. Finally, the roughness and shape parameters have been measured on the contour surface of the cams. The arithmetical mean roughness Ra value of the milled cam was 0.269 μm, below the requirement of 0.4 μm, and shape error was 18 μm, below 50 μm. Shape error of the WEDM cam of 48 μm meets the requirements for cams. However, the Ra value of 1.212 μm, exceeded the limit. For this reason, a finish operation is recommended in this case. Some advantages of WEDM cams over milled cams are that different conductive materials can be employed, more complex shapes can be obtained, and that, in rough operations, the amount of material to be removed in subsequent operations is considerably reduced.
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Gal-Tzur, Z., M. Shpitalni, and S. Malkin. "Design and Manufacturing Analyses for Integrated CAD/CAM of Cams." Journal of Engineering for Industry 111, no. 4 (November 1, 1989): 307–14. http://dx.doi.org/10.1115/1.3188765.

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Design and manufacturing analyses are presented which are the basis for an integrated CAD/CAM system for cams. The design analysis begins with the lift schedule specified either by analytical functions or by discrete data points which are transformed to an analytical form by cubic spline interpolation. The required cam contour and its curvature at each point on the cam periphery are then derived. Machining of the required cam shape is analyzed for NC jig grinding, CNC grinding, and rocker grinding. For NC jig grinding only the geometrical aspects of the process are analyzed, but for CNC and rocker grinding both the geometrical and physical aspects of the process are considered for control of cam geometry and thermal damage. Integration of design and maufacturing tasks in this way allows for manufacturing characteristics and limitations to be taken into account in the design stage.
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Rybansky, David, Martin Sotola, Pavel Marsalek, Zdenek Poruba, and Martin Fusek. "Study of Optimal Cam Design of Dual-Axle Spring-Loaded Camming Device." Materials 14, no. 8 (April 13, 2021): 1940. http://dx.doi.org/10.3390/ma14081940.

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The spring-loaded camming device (SLCD), also known as “friend”, is a simple mechanism used to ensure the safety of the climber through fall prevention. SLCD consists of two pairs of opposing cams rotating separately, with one (single-axle SLCD) or two (dual-axle SLCD) pins connecting the opposing cams, a stem, connected to the pins, providing the attachment of the climbing rope, springs, which simultaneously push cams to a fully expanded position, and an operating element controlling the cam position. The expansion of cams is thus adaptable to allow insertion or removal of the device into/from a rock crack. While the pins, stem, operating element, and springs can be considered optimal, the (especially internal) shape of the cam allows space for improvement, especially where the weight is concerned. This paper focuses on optimizing the internal shape of the dual-axle SLCD cam from the perspective of the weight/stiffness trade-off. For this purpose, two computational models are designed and multi-step topology optimization (TOP) are performed. From the computational models’ point of view, SLCD is considered symmetric and only one cam is optimized and smoothened using parametric curves. Finally, the load-bearing capacity of the new cam design is analyzed. This work is based on practical industry requirements, and the obtained results will be reflected in a new commercial design of SLCD.
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Zhang, Yuhua, and Joong-Ho Shin. "A Computational Approach to Profile Generation of Planar Cam Mechanisms." Journal of Mechanical Design 126, no. 1 (January 1, 2004): 183–88. http://dx.doi.org/10.1115/1.1637652.

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A new approach, called a Relative Motion Method (RMM), is proposed for designing the shape of the disk cam, which uses the relative velocity and the relative acceleration of a follower respect to a cam to discover the profile coordinate, the pressure angle and the radius of curvature on the cam. It is characterized by the procedures of automatic derivation and solution with computers and the suitability not only for general disk cams with different kinds of follower, such as sharp edge follower, roller follower, flat-faced follower, and so on, but also for the double-disk conjugate cams, single-disk conjugate cams and roller gear conjugate cams. A program for design automation of shape of the disk cam and the kinematics simulation of this kind of mechanism has been developed using the proposed approach with C++ language. Finally, an example is given.
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Qu, Cheng Long, and Yong Chang. "Design of the Disc Cam Profile with Negative Radius Translating Roller Follower." Applied Mechanics and Materials 470 (December 2013): 412–15. http://dx.doi.org/10.4028/www.scientific.net/amm.470.412.

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Abstract: This paper is to study the force-locking and shape-locking conjugate cam mechanisms. problems of the theoretical and actual contour of the cams with negative radius translation roller follower are solved by the use of "definite proportion and division point" method. The results could lead an important foundation for further research of the new type cam mechanisms.
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Xu, Zeyu, Zhou Yang, Jieli Duan, Mohui Jin, Jiasi Mo, Lei Zhao, Jie Guo, and Huanli Yao. "Design and Experiment of Symmetrical Shape Deployable Arc Profiling Mechanism Based on Composite Multi-Cam Structure." Symmetry 11, no. 8 (July 30, 2019): 958. http://dx.doi.org/10.3390/sym11080958.

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At present, there are few reports on the profiling mechanism that can achieve surface envelope profiling along the surface of a shaft whose radius is constantly changing. Existing profiling mechanisms cannot achieve this function. To this end, a novel deployable arc profiling mechanism is presented in this paper. The mechanism can realize centering deployment along the shaft with a changing radius. The radius of the deployable arc can be adapted to the continuous change of shaft radius, and its surface can always maintain the arc shape for surface envelope profiling. The mechanism is mainly composed of compound cams. Each cam contains multiple grooves, and each groove connects to an arc support linkage. The arc support linkage is controlled by the compound motion of cams in different layers. The pitch curve of each groove is designed by applying the method of relative motion and inverse solution and obtained various parameter equations of the mechanism. The feasibility of this mechanism is verified by analysis, experiment, and application test. The results show that the proposed deployable arc profiling mechanism can achieve the design purpose and the profiling accuracy is kept above 96.425%.
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Dostrašil, Pavel. "Effective design and implementation of specific displacement diagrams to control kinetic sculptures." MATEC Web of Conferences 210 (2018): 04004. http://dx.doi.org/10.1051/matecconf/201821004004.

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Electronic cams are used for different manufacturing systems, but in terms of displacement diagrams, they have common characteristics. The emphasis is usually placed on maximum accuracy, minimum machine cycle time and the displacement diagram has a simple shape. This paper addresses a completely different case, which shows that the use of electronic cams is very diverse. An Omron’s electronic cam was used to control kinetic art sculptures. It was necessary to develop an implementation that would be able to accommodate a large number of very long and complex displacement diagrams. Some sculptures contained up to 147 interpolating axes and their programs took up to an hour. The proposal builds on the basic animation and designer’s demands, but it must comply with all the limits of the mechanism (maximum speed, torque, etc.). For this purpose, an independent software tool was developed. The final displacement diagram is composed from polynomial of the 5th order by defining the 0th, 1st, and 2nd derivatives at the key points. This method of design has proved to be very effective, and in addition, this implementation brought a significant saving of memory and reduction of computational complexity.
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Березін, Л. М. "ДО РОЗРАХУНКУ ГЕОМЕТРИЧНИХ ПАРАМЕТРІВ ПОДАТЛИВИХ ГРАНЕЙ КЛИНІВ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 138, no. 5 (February 3, 2020): 9–16. http://dx.doi.org/10.30857/1813-6796.2019.5.1.

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Development of recommendations for calculating the geometry of cams with flexibility facet, which have console beams with variable moment of section resistance along their length for provide strength conditions and specified deflections. Method of search, description, analogous and information analysis is used to audit the many possible decisions regarding the subject of research, the experience in the field of knitting machines of automatic half-hose machine and methods of cross and longitudinal sections from the classical position of resistance of materials. Mathematical support for the complex approach of working out of cams of various designs with flexibility working facets according to the criteria of strength, flexibility and minimization of geometric dimensions using the beam shape coefficient of deflections is presented. The advantages of beams with equal resistance along its length in comparison with homogeneous beams having constant section sizes are shown. The dependences are given, which advisable to determine the dimensions of the root and final sections of a trapezoidal beam with a free end load of concentrated force, and also formulas for calculating the shape coefficient by deflection with sufficient accuracy and convenience in engineering calculations. Further development of the theory and methodology of designing elements of knitting systems of automatic half-hose machine based on load modes, dimensions restrictions and technological process requirements. Questions are presented that contribute to a comprehensive approach to the improvement of cams designs with flexibility facet based on calculated recommendations, taking into account their specificity. The information helps to improve the quality and efficiency of cam design solutions to meet the requirements for strength and flexibility using the economic index of section.
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Maiti, Rathindranath, Indraneel Biswas, Vivek Nema, Saurabh Basu, Bhabani Sankar Mahanto, and Bikash Routh. "Design and development of strain wave generating cam for a new concept ‘harmonic drive’." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 8 (November 23, 2012): 1870–84. http://dx.doi.org/10.1177/0954406212466354.

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A split cam design is proposed to solve the problem of assembly of the single piece cam in the flexible raced bearing of an earlier proposed novel harmonic drive system, which shows better torque characteristics and capacities in comparison to the conventional one of same size with oval-shaped strain wave generating cam. The cam profile has circular arcs at two working zones at 180° phases. The proposed profile shape is identified as the cause of trouble in assembly if the cam is made single piece. The split cam is made of two identical pieces having circular arc edges. These pieces constitute the cam in assembly after putting it inside the inner race of the flex bearing and adjusted by an adjuster. The design, kinematics, and the assembly method of the proposed split cam are presented in this article. The split cam arrangement not only solves the assembly problem but also gives a scope of fine adjustment of center distance (eccentricity). Such an adjustment is not possible in conventional oval wave generating cam. Stresses in flex gear cups assembled with both type cams at load and no-load conditions are estimated using finite element method. Some results are verified experimentally. Although the flex gear cup with the proposed split cam experiences lower stresses at load transmitting active gear contact zones, it shows higher stresses at some non-active zones (where teeth are free of load). It is apparent from results that stresses at those non-active zones do not increase substantially with the increase in torque, as they are away from active zones.
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Quaglia, Giuseppe, Daniela Maffiodo, and Francesco Pescarmona. "A Novel Continuous Alternate Motion Mechanism With Two Input Wheels." Journal of Mechanical Design 129, no. 8 (June 27, 2006): 858–64. http://dx.doi.org/10.1115/1.2735638.

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This paper presents the design of a mechanism with the following specifications: continuous alternate motion, wide motion phases with constant angular velocity, parallel input and output shafts, and great strokes. Those specifications derive from a possible application in the textile field. The mechanism is composed of two star wheels properly coupled together: there are two counter-rotating input wheels, alternately coupling with slots first, then teeth at each side of the output wheel. As usual for star wheels, pins and slots handle the acceleration and deceleration phases, while the constant velocity phase is performed by coupling sectors of toothed gears. A proper design of pins and slots is performed, so that at the same time when a pin from one input wheel is releasing a slot, a pin from the other input wheel engages a slot on the other side of the output wheel, forcing the latter to an opposite motion. In this way the output wheel has a continuous and smooth alternate motion. By annihilating the arrest phases typical of star wheels, the proposed system eliminates the discontinuities in the acceleration diagram. The paper develops a complete parametrical analysis of the device, underlining the effect of the constraints on the shape of the motion laws with particular emphasis on the acceleration and deceleration phases. In this way the output wheel has a continuous and smooth alternate motion. With respect to an analogous mechanism realizing the same laws of motion, e.g., cams, this device is very compact and economical, also presenting parallel input and output shafts, and significantly reduces sliding and wear.
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Dissertations / Theses on the topic "Cams shape design"

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Závodník, Michal. "Návrh sportovních vaček pro motocyklový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231762.

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The master thesis contains a theoretical part with the topic of valve train. It contains measured data and their processing. The processed data are used to create the 1D engine’s simulation. Valve train’s parameters were modified for increased power and torque. Contained two variants of changes can serve as guide for final draft because of next adjustments.
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Bláha, Pavel. "Návrh konstrukce jednoúčelového manipulátoru pro automatickou výměnu nástrojů s třívačkovým generátorem pracovního cyklu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442800.

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This thesis deals with the design of a single-purpose manipulator for automatic tool changing with a three-cams generator of the working cycle. At the beginning of the paper, general background information about tool trays and manipulators for the change of tools is briefly described. The scheme of the kinematic manipulator is proposed in this work as well. The thesis also includes the calculation of the shapes of the grooves in the cams. The result of this work is the design of the manipulator, including an animation of tool changing.
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(8797649), Syed Faaiz Hussain. "A COMPARISON OF 3D SHAPE RECOGNITION IN COMPUTER AIDED DESIGN BETWEEN VIRTUAL REALITY AND CONVENTIONAL TWO DIMENSIONAL DISPLAYS." Thesis, 2020.

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The recent development of Virtual Reality technology, researchers are looking more into changing the way Virtual Reality is used in our daily lives in order to increase our productivity. One such application is the mapping of 3D spatial graphics in Computer Aided Design engineering where practitioners have been historically working on 3D models in a two dimensional environment. Researchers in Computer Graphics have proposed Virtual Reality as a more effective medium for CAD packages. This thesis carries out a user study to test whether or not 3D VR environments are more effective in relaying information to the users as compared to two dimensional displays such as computer screens by conducting a study to determine how users navigate and interact with complex CAD objects in the two different environments. The two environments make use of stereoscopic vision and monoscopic vision in order to compare the efficiency with which volunteers are able to notice subtle differences in objects. The motivation for this study stems from the fact that CAD in VR is largely an underdeveloped topic and the result of such a study could form a baseline and advocate for further research and development in this domain. The research question being addressed is “Does CAD in a three-dimensional Virtual Reality Environment(stereoscopic) allow for better understanding of shapes of complex assemblies as compared to CAD on two-dimensional (monoscopic) computer screens?” The findings of this study suggest that rather than just the display technique the kind of movements which objects undergo also contributes to the way users perceive the objects in 3D vs 2D spaces and uncover a set of directions which would be recommended for similar studies in the future.


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Books on the topic "Cams shape design"

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1953-, Maekawa Takashi, ed. Shape interrogation for computer aided design and manufacturing. Heidelberg: Springer, 2010.

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Elsas, Peter Alexander van. Free-form displacement features in conceptual shape design. Delft, The Netherlands: Delft University Press, 1997.

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Vesco, Silvia. Spontanea maestria. Venice: Fondazione Università Ca’ Foscari, 2020. http://dx.doi.org/10.30687/978-88-6969-426-4.

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The appearance of Dr Vesco’s translation and study of Hokusai’s Ryakuga haya oshie, together with a full reproduction of the original book, is a matter of great excitement in the field of Japanese Studies. Hokusai has been known in Europe and North America for some 150 years. In his own country, he came to public attention about 1800, with youthful work produced under the name of Shunrô. He lived to the advanced age of 88, and when he died in 1849, he was one of the best-known artists in Japan. He was soon to be the best-known Japanese artist in the West, a status that he probably still holds. ‘Under the Great Wave off Kanagawa’ – often referred to simply as ‘Hokusai’s Great Wave’ (from the Thirty-six View of Mt Fuji) – is said to be the most immediately-recognisable piece of graphic design worldwide. Hokusai was a townsman living in a socially stratified society. He was not a member of the elite, though other famous artists were. He did neither depict elite topics, nor work for elite clients. Rather, Hokusai associated with the ‘Floating World’ (ukiyo) that is Edo’s leisure-time distractions. He also made views of his city, its surroundings, and the wider Japanese countryside, but he was not a great traveller, other than in his mind. Rather unrecognised is what Dr Vesco now brings to our attention. Hokusai saw his role as promoting the practice of art. Of course, he had his students, but as we see here, Hokusai also published out-reach volumes, aimed at introducing the joys of picture-making to amateurs who were not being formally instructed. The lessons were easy to follow, and also fun, as he reduced people animals and plants to basic shapes and formulae. Starting with the auspicious subject of Tang lions (kara shishi), Hokusai leads us through a range of topics, down to the demotic, such as clothes washing. Readers today will certainly find a smile crossing their face as they look through the pictures. Thanks to Dr Vesco’s careful translations, we can also understand the advice and commentaries supplied in Hokusai’s accompanying texts. An additional feature of Dr Vesco’s work will be of assistance to more specialist readers, as she has transcribed the original Japanese. This was no simple task, as it is written in abbreviated calligraphy (kuzushiji). At all levels, readers, art enthusiasts and those who love to create pictures will now have access to Hokusai’s most important study aid. We can delve into it, copy from, and chuckle at, just as people did when the volumes first appeared. Western readers might ponder something else: Ryakuga haya oshie appeared in 1812, as European countries were tearing themselves apart.
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Shape Interrogation for Computer Aided Design and Manufacturing (Mathematics and Visualization). Springer, 2002.

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Elsas, P. A. Van, and Peter Alexander Van Elsas. Free-Form Displacement Features in Conceptual Shape Design: The Use of a Computer-Aided Conceptual Design Tool. Coronet Books, 1997.

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Adamthwaite, Anthony. ‘A Low Dishonest Decade’? Edited by Nicholas Doumanis. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199695669.013.12.

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This analysis of the origins of the Second World War in Europe challenges several key ideas of the historiography: the ‘thirty years war’ thesis, the notion of a European civil war, and the stereotyping of the 1930s as a seemingly unstoppable rush to war after the internationalism of the 1920s. There was no sharp contrast between decades—the period only makes sense as a whole. Churchill’s ‘unnecessary war’ was preventable. Alternatives to appeasement existed. Though the study of war origins starts with Hitler, his policies were decisively shaped by the actions of others and the instability of an international system, heavily impacted by the Great Depression and ideology. Miscalculation rather than design explains the war of 1939. The outbreak of war should not obscure the significance of the 1930s as a laboratory for ideas and institutions that came to fruition after 1945 and which continue to shape international society.
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D, Hilton Peter, and Jacobs Paul F, eds. Rapid tooling: Technologies and industrial applications. New York: Marcel Dekker, 2000.

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Lasc, Anca I. Interior decorating in nineteenth-century France. Manchester University Press, 2018. http://dx.doi.org/10.7228/manchester/9781526113382.001.0001.

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This book analyzes the early stages of the interior design profession as articulated within the circles involved in the decoration of the private home in the second half of nineteenth-century France. It argues that the increased presence of the modern, domestic interior in the visual culture of the nineteenth century enabled the profession to take shape. Upholsterers, cabinet-makers, architects, stage designers, department stores, taste advisors, collectors, and illustrators, came together to “sell” the idea of the unified interior as an image and a total work of art. The ideal domestic interior took several media as its outlet, including taste manuals, pattern books, illustrated magazines, art and architectural exhibitions, and department store catalogs. The chapters outline the terms of reception within which the work of each professional group involved in the appearance and design of the nineteenth-century French domestic interior emerged and focus on specific works by members of each group. If Chapter 1 concentrates on collectors and taste advisors, outlining the new definitions of the modern interior they developed, Chapter 2 focuses on the response of upholsterers, architects, and cabinet-makers to the same new conceptions of the ideal private interior. Chapter 3 considers the contribution of the world of entertainment to the field of interior design while Chapter 4 moves into the world of commerce to study how department stores popularized the modern interior with the middle classes. Chapter 5 returns to architects to understand how their engagement with popular journals shaped new interior decorating styles.
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Pool, Robert. Beyond Engineering. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195107722.001.0001.

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We have long recognized technology as a driving force behind much historical and cultural change. The invention of the printing press initiated the Reformation. The development of the compass ushered in the Age of Exploration and the discovery of the New World. The cotton gin created the conditions that led to the Civil War. Now, in Beyond Engineering, science writer Robert Pool turns the question around to examine how society shapes technology. Drawing on such disparate fields as history, economics, risk analysis, management science, sociology, and psychology, Pool illuminates the complex, often fascinating interplay between machines and society, in a book that will revolutionize how we think about technology. We tend to think that reason guides technological development, that engineering expertise alone determines the final form an invention takes. But if you look closely enough at the history of any invention, says Pool, you will find that factors unrelated to engineering seem to have an almost equal impact. In his wide-ranging volume, he traces developments in nuclear energy, automobiles, light bulbs, commercial electricity, and personal computers, to reveal that the ultimate shape of a technology often has as much to do with outside and unforeseen forces. For instance, Pool explores the reasons why steam-powered cars lost out to internal combustion engines. He shows that the Stanley Steamer was in many ways superior to the Model T--it set a land speed record in 1906 of more than 127 miles per hour, it had no transmission (and no transmission headaches), and it was simpler (one Stanley engine had only twenty-two moving parts) and quieter than a gas engine--but the steamers were killed off by factors that had little or nothing to do with their engineering merits, including the Stanley twins' lack of business acumen and an outbreak of hoof-and-mouth disease. Pool illuminates other aspects of technology as well. He traces how seemingly minor decisions made early along the path of development can have profound consequences further down the road, and perhaps most important, he argues that with the increasing complexity of our technological advances--from nuclear reactors to genetic engineering--the number of things that can go wrong multiplies, making it increasingly difficult to engineer risk out of the equation. Citing such catastrophes as Bhopal, Three Mile Island, the Exxon Valdez, the Challenger, and Chernobyl, he argues that is it time to rethink our approach to technology. The days are gone when machines were solely a product of larger-than-life inventors and hard-working engineers. Increasingly, technology will be a joint effort, with its design shaped not only by engineers and executives but also psychologists, political scientists, management theorists, risk specialists, regulators and courts, and the general public. Whether discussing bovine growth hormone, molten-salt reactors, or baboon-to-human transplants, Beyond Engineering is an engaging look at modern technology and an illuminating account of how technology and the modern world shape each other.
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Pironneau, O., B. Kawohl, L. Tartar, and J. P. Zolesio. Optimal Shape Design: Lectures given at the Joint C.I.M./C.I.M.E. Summer School held in Troia (Portugal), June 1-6, 1998 (Lecture Notes in Mathematics / Fondazione C.I.M.E., Firenze). Springer, 2000.

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Book chapters on the topic "Cams shape design"

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Mollard, R. "Shape modeling driven by the product design." In CARS 2002 Computer Assisted Radiology and Surgery, 559–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56168-9_93.

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Stone, Dan. "3. The Third Reich’s world of camps." In Concentration Camps: A Very Short Introduction, 30–49. Oxford University Press, 2019. http://dx.doi.org/10.1093/actrade/9780198723387.003.0003.

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‘The Third Reich’s world of camps’ examines the history of the Nazi camp system, comparing labour camps devised to build the ‘racial community’ with concentration camps set up to exclude political opponents and eventually to eradicate unwanted others—‘asocials’ and then Jews. The SS concentration camps at Buchenwald, Dachau, and Sachsenhausen, which were designed to brutalize the inmates and at which death was common, can be distinguished from the death camps at Chełmno, Bełżec, Sobibór, and Treblinka. Exceptions were Majdanek and Auschwitz, which by 1942 combined the functions of concentration and death camps. The images and testimonies of the liberation of the Nazi camps have shaped our definition of concentration camps.
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Engerman, Jason Alphonso, Richard F. Otto, and Mark VanAuken. "ESportsU Digital Warrior Camp." In Advances in E-Business Research, 239–68. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7300-6.ch012.

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The authors share two case studies that provide preliminary data for a National Science Foundation Innovative Technology Experiences for Students and Teachers award at the intersection of interactive media for STEM career development. The chapter explores the potential of culturally relevant Esports gaming activities to enhance students' motivation, attitudes, and awareness towards careers in the digital media aspects of traditional video gaming and Esports. Towards designing authentic learning environments, the findings from the two case studies revealed that play ecosystems help identify social, cultural, and historical attributes of gaming communities; students need opportunities to take on leadership roles in the design and development of the environment by trusting that they are capable of technological innovations; and that social and cultural nuance of tools, rules, and language define gaming communities.
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Rossdale, Chris. "Contestations." In Resisting Militarism, 139–72. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474443036.003.0007.

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This chapter considers how anti-militarists challenge militarised forms of contestation by prefiguring alternatives. The chapter opens by introducing again the concept of prefiguration, which holds that the means used to achieve political change will shape or become the ends that result. It then considers three distinct anti-militarist practices – peace camps, die-ins, and the use of humour – showing how each of these is guided by a desire to generate subjectivities and relationalities which do not reproduce militarism. In contrast, the last part of the chapter considers how anti-militarism is shaped not simply by opposition to militarism, but also by desire for it. Drawing on auto-ethnographic reflections, the discussion outlines how acknowledging the role of desire in social movements deepens the radical promise of prefiguration.
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Hinnershitz, Stephanie. "Post-1965 Changes in Asian America." In A Different Shade of Justice. University of North Carolina Press, 2017. http://dx.doi.org/10.5149/northcarolina/9781469633695.003.0005.

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After World War II and through the 1960s, Asian Americans began a transformative process, from being the “yellow peril” to becoming the model minority, and Asian Americans in the South experienced, to some degree, the same transformation. The war and its mottos of fighting for freedom and democracy at home and abroad affected the way Americans viewed their own hypocrisy toward minorities in the United States. African Americans were the largest minority group to use the aims of the war to demand attention to their plight with Jim Crow, prompting the growth of a nationwide civil rights movement, but Americans also came to view the century-old forms of legal discrimination against Asian immigrants and Asian Americans in a new light. Not only did Congress repeal the Chinese Exclusion Act in 1943 (making it legal for some Chinese to naturalize and allowing a small number of Chinese immigrants to enter the United States), but Filipino Americans and Indian Americans received similar treatment during and after World War II. In 1952, the McCarran-Walter Act (or the Immigration and Nationality Act of 1952), although designed to protect American security during the early Cold War by prohibiting and deporting subversive aliens, also made it possible for Asian immigrants of all ethnicities to become American citizens (while the number of Asians admitted to the United States did not drastically increase). Americans also viewed the ability of Japanese Americans to overcome the massive civil rights violations of wartime imprisonment and achieve economic and educational success as a model for all minorities to follow. Asian Americans came through the fires of World War II and proved that they were loyal Americans and deserving of equal treatment and respect, and while more subtle and sometimes not so subtle forms of racism and discrimination ...
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Jones, Angela. "Global Motivations to Cam." In Camming, 87–108. NYU Press, 2020. http://dx.doi.org/10.18574/nyu/9781479842964.003.0005.

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This chapter explores the motivations for selling sex online. A desire to earn decent wages motivates workers to become cam models. The social conditions that create these economic urgencies are vital for understanding their choice to cam. Context conditions the costs of the resources we need to survive, and our identities and social positioning in various overlapping systems of oppression shape our access to those resources. Cam performers are not engaged in a political struggle to overthrow capitalist labor. They are capitalists. However, their work does have the potential to crack capitalism and the various systems of oppression that cause people unbearable pain. Cam workers’ performances challenge systems of oppression designed to deprive women, people of color, trans and genderqueer folks, and people with disabilities a public space in which to live, work, and find joy. Performers publicly disrupt acceptable modes of sexuality and pleasure every day. Even though camming will never deliver Marxist liberation to workers, the camming industry is a new alternative mode of labor in which workers seek to reconcile work with dignity and pleasure. Work sucks, and cam performers, like so many workers, want to escape alienation and lead pleasurable lives.
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Salzman, Harold, and Stephen R. Rosenthal. "The Structure of Software Design." In Software by Design. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195083408.003.0008.

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The software industry really came of age in the 1970s and 1980s. This was a time of technological transformation in the workplace. The computer expanded from the backroom to the front office and evolved from simple data processing to integrated information systems. The growth of the independent software vendor led to an important change in software design. User firms began to purchase large, standard or semicustom systems from thirdparty vendors rather than purchasing software with hardware and having most applications software custom designed by an in-house programming staff. This added another dimension to the software design process: Software became the product of at least two organizations (the vendor and one or more user firms) and its design and production became mediated by the market. The organizational simplicity of software design occurring within one organization, as difficult a process as that may be, became relatively more complex organizationally. This chapter examines one part of the process of technology design and use: the activities internal to the software design firm. It concentrates on the structure and dynamics of the design process rather than on specific design decisions. The findings presented in this chapter are based on a survey of vendor firms and may represent a different perspective than findings on software developed within a user firm. By focusing on dynamics that transcend choices of particular individuals, we show how decisions are shaped and constrained by the structure of the design process itself. The three chapters following this one present case studies that describe specific choices of software features and functions and analyze the impacts of those choices on software users and customers. Taken together, this chapter and the case studies present the dual perspective necessary to appreciate how software is a socially constructed technology. The business applications software industry for mainframes and minicomputers is composed of hardware manufacturers such as IBM and Digital Equipment Corporation, several large vendors, and numbers of small specialty firms.
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Olsen, Megan M., Kyle I. Harrington, and Hava T. Siegelmann. "Conspecific Emotional Cooperation Biases Population Dynamics." In Nature-Inspired Computing Design, Development, and Applications, 255–70. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-1574-8.ch014.

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In this paper, the authors evaluate the benefit of emotions in population dynamics and evolution. The authors enhance cellular automata (CA) simulating the interactions of competing populations with emotionally inspired rules in communication, interpretation, and action. While CAs have been investigated in studies of population dynamics due to their ability to capture spatial interactions, emotion-like interactions have yet to be considered. Our cellular stochastic system describes interacting foxes that feed on rabbits that feed on carrots. Emotions enable foxes and rabbits to improve their decisions and share their experiences with neighboring conspecifics. To improve the system’s biological relevance, it includes inter-species disease transmission, and emotions encode data pertaining to both survival and epidemic reduction. Results indicate that emotions increase adaptability, help control disease, and improve survival for the species that utilizes them. Simulations support the hypothesis that the acquisition of emotion may be an evolutionary result of competitive species interactions.
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Eva, Hüpkes. "Part VII International Securities, Including Markets and Clearing Systems, 18 The Architecture of International Financial Regulation." In Financial Markets and Exchanges Law. Oxford University Press, 2021. http://dx.doi.org/10.1093/law/9780198827528.003.0018.

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This chapter examines the term “international financial architecture”, which is of fairly recent origin and has been used only occasionally prior to the Asian crisis. It explains how international financial architecture provides a somewhat misleading impression of the nature of the process by which the institutions and policies that shape the global financial system came into being. It also describes international financial architecture as more of the outcome of an evolutionary process than the product of intelligent design. This chapter highlights changes in the international financial and monetary systems and in the arrangements for providing meaningful and cohesive oversight in response to changes in the world economy and in the political environment. It also analyses the development of a body of normative texts referred to as international financial regulation.
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Evans, Penny, and Angela Piccini. "The regulatory aesthetics of co-production." In The Impact of Co-Production. Policy Press, 2017. http://dx.doi.org/10.1332/policypress/9781447330288.003.0007.

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This chapter examines three case study projects that came out of University of Bristol and Knowle West Media Centre (KWMC) collaboration. Within those projects, it looks at the positioning of arts practices as knowledge producing, rather than instrumental or facilitative. The chapter addresses some of the issues around collaboration and regulation, and analyses how arts-based projects are shaped through institutional structures. KWMC and the University of Bristol have been collaborating across a number of research projects over the past decade. KWMC works with media artists to engage citizens often excluded from decision-making and research through exploring local, national, and international issues in order to co-produce and co-design the testing of ideas, products, and technologies.
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Conference papers on the topic "Cams shape design"

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Eventoff, Arnold T. "Automated Cam-Mechanism Synthesis and Analysis." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0299.

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Abstract An automated computer-based method for deriving the shape of machine elements such as cams is described for complex mechanisms. Traditional cam synthesis concentrates on follower motion; the method described here enables complete control of the required output motion. Output motion is defined for any constant or variable camshaft velocity. The process is not limited by the degrees of freedom, follower shape, follower suspension, or complexity of the mechanism linking followers to output points. The method includes a velocity analysis to predict cam shape, pressure angle, and relative velocity of the follower with respect to the cam. This analysis allows immediate visual inspection and further dynamic and wear analyses. Cam-follower contact stress is readily calculated for an entire cycle of motion during the synthesis process. An example consisting of a five-bar linkage displaced by three cams is synthesized using the methodology. The general method described facilitates development of mechanisms previously not feasible using conventional methods. Servomotor command displacement profiles required for complex systems can also be derived using this method.
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Aguib, Karim A., Keith A. Hekman, and Ashraf O. Nassef. "Shape Optimization of a Camoid Follower Surface." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49659.

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Camoids are three dimensional cams that can produce more complex follower output than plain disc cams. A camoid follower motion is described by a surface rather than a curve. The camoid profile can be directly synthesized once the follower surface is fully described. To define a camoid follower motion surface it is required that the surface pass by all predefined constraints. Constraints can be follower position, velocity and acceleration. These design constraints are scattered all along the camoid follower surface. Hence a fitting technique is needed to satisfy these constraints which include position and its derivatives (velocity and acceleration). Furthermore if the fitting function can be of a parametric nature, then it would be possible to optimize the follower surface to obtain better performance according to a specific objective. Previous research has established a method to fit camoid follower surface positions, but did not tackle the satisfaction of derivative constraints. This paper presents a method for defining a camoid follower characteristic surface B-Splines on two steps first synthesizing the sectional cam curves then using a surface interpolation technique to generate the follower characteristic surface. The fitting technique is parametric in nature which allows for its optimization. Real coded Genetic algorithms are used to optimize the parameters of the surface to meet a specified objective function. A demonstration problem to illustrate the suggested methodology is presented.
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Gupta, Rakesh, and Mark J. Jakiela. "Simulation and Shape Synthesis of Kinematic Pairs via Small-Scale Interference Detection: Advanced Examples Demonstrating Shape Optimization and Non-Fixed Axis Members." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0004.

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Abstract A method to simulate the interactions between kinematic pairs (meshing gears, cams and followers, Geneva mechanisms, etc.) has been described in an earlier paper (Gupta and Jakiela, 1992a). This second paper, through several examples, demonstrates how our representations and algorithms for kinematic simulation and shape synthesis facilitate subsequent reasoning for design tasks. Included are examples of a complex industrially relevant simulation, shape optimization motivated by kinematic behavior, and extensions of the approach for non-fixed-axis members.
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Duerr, Konrad, and Rudolf Seethaler. "Time Optimum Cam Synthesis With Manufacturing and Operation Constraints." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40658.

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Traditionally, cam profiles have been described in terms of harmonic functions or splines that are optimized to provide low residual oscillations and avoid constraints such as pressure angle. For automotive cams used in internal combustion engines, the designer usually manually manipulates the control points of the spline functions and checks for constraint violations by feeding the obtained cam profile through a dynamic simulation of the valve train. This is a lengthy and iterative process that cannot guarantee that the obtained cam profile is truly optimal, since constraint boundaries are usually only met at a few distinct points along the cam profile. However, a truly time optimal cam profile will need to follow constraints during the complete motion. This paper then shows a reverse design procedure, where cam profiles are defined in terms of the constraint functions. A valve lift profile is assembled that moves along the boundary of the feasible valve lift space. The resulting cam motion is constrained at all times and represents a time optimum cam profile in terms of the selected constraints. The proposed methodology is computationally efficient and runs effectively on standard office computers. Automotive cam designers can use the results of this approach as an initial starting point for their cam shape optimization.
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Wang, Chun-Chi, N. Michael Mayer, Rui-Yuan Lin, and Li-Yang Lu. "Mechanical and system design of Egg shape robot." In 2017 International Automatic Control Conference (CACS). IEEE, 2017. http://dx.doi.org/10.1109/cacs.2017.8284231.

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Tzou, H. S., and J. P. Zhong. "Distributed Orthogonal Filtering of Piezoelectric Shell Actuators." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0220.

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Abstract Distributed control of elastic shell continua using spatially distributed piezoelectric actuators is proposed and a generic distributed velocity feedback algorithm with a spatial modal feedback function formulated. The generic distributed modal feedback function is further represented by a gain factor and a spatially distributed orthogonal (mode shape) function to achieve independent modal actuation capability. Based on this principle, distributed piezoelectric actuators can be spatially shaped to emulate the spatial orthogonal actuation of the distributed modal feedback function. Distributed orthogonal shaped modal actuators for ring shells are proposed and their modal actuations demonstrated. Analyses suggested that the primary control action came from the in-plane membrane (circumferential) forces and that contributed by the bending control moment is relatively insignificant for lower natural modes. Control effects due to thickness variation of the ring shell and the actuator are also investigated.
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Ramly, Nurul Jannah, Mohamad Kamal A. Rahim, Noor Asmawati Samsuri, Mohd Fairus Mohd Yusoff, Muhammad Faizal Ismail, and Huda A. Majid. "Leaf-Shaped Textile Dipole Antenna Design." In 2019 IEEE Conference on Antenna Measurements & Applications (CAMA). IEEE, 2019. http://dx.doi.org/10.1109/cama47423.2019.8959584.

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Pabiszczak, Stanislaw, Adam Myszkowski, Roman Staniek, and Lukasz Macyszyn. "Kinematic Analysis and Design of Eccentric Rolling Transmission." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70524.

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The paper shows an idea of a new type of mechanical gear — the eccentric rolling transmission. The main parts of that transmission are rolling bearings, mounted eccentrically on the input shaft which cooperate with the special-shaped cam wheels mounted on the output shaft. The number of rolling bearings is equal to the number of cam wheels. On the basis of kinematic analysis equations of the curve which describe a shape of cam wheels were determined for two different cases: in the first one the directions of shafts rotations were opposite, and in the second they were the same. Kinematic analysis of the novel transmission was carried out to determine maximum gear ratio depending on the adopted input parameters. As a result of analyses a design procedure of the eccentric rolling transmission and CAD model were prepared.
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Yang, Ming, Yuyi Lin, and Xiaoyi Jin. "Kineto-Elastic Analysis of a Compound Bow." 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/detc2015-46818.

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This paper presents the kineto-elastic analysis of a compound bow which in each side of the limbs has two stacked eccentric cams connected by two inextensible cables and one inextensible string. A large deformation cantilever beam model was created to determine the center trajectories of the cams. The principle of finite element method was applied to calculate the deformation of the limbs by combining small deflections of segmented cantilever beam elements. Another part of this work is the construction of a quasi-static model to simulate the draw process. The displacements of cams, cables and string were analyzed by gradually drawing the bow string. The required draw force as a function of draw length was obtained, and verified by experiments. The kineto-elastic analysis procedure described in this paper can be used later for the optimal design of the shapes of the cams and limbs. The modeling and simulation procedure used for combining elastic components, flexible but inextensible string-cable components, and rigid component in a precision dynamic model of a mechanical system can also be applied to archery bows with more complex configuration, and to other similar mechanical systems.
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Ravani, B., and J. W. Wang. "Computer Aided Geometric Design of Line Constructs." In ASME 1990 Design Technical Conferences. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/detc1990-0030.

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Abstract This paper develops a mathematical foundation for Computer Aided Design (CAD) of sculptured shapes based on line geometry. First, a new representation is presented for a line based on Plücker coordinates that would allow specification of a line segment (rather than an infinite line) in an elegant manner and suitable for computational purposes. Then, methods are presented for geometric design of shape patches (here referred to as line constructs) by interpolating or approximating a set of control lines (rather than control points) using ruled surfaces, line congruences and line complexes. The methods presented are general and allow utilization of different basis functions such as Bézier, Cardinal and B-spline bases. As Computer Aided Manufacturing (CAM) application of the theory, methods are developed for generation of offsets of ruled surfaces useful in Numerical Control (NC) milling and tool motion generation in the Wire Cut Electric Discharge Machining (EDM) operation.
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