Academic literature on the topic 'Links and link-motion – Computer programs'
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Journal articles on the topic "Links and link-motion – Computer programs"
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Chmutov, S., S. Jablan, K. Karvounis, and S. Lambropoulou. "On the link invariants from the Yokonuma–Hecke algebras." Journal of Knot Theory and Its Ramifications 25, no. 09 (August 2016): 1641004. http://dx.doi.org/10.1142/s0218216516410042.
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In this paper, we study properties of the Markov trace tr[Formula: see text] and the specialized trace [Formula: see text] on the Yokonuma–Hecke algebras, such as behavior under inversion of a word, connected sums and mirror imaging. We then define invariants for framed, classical and singular links through the trace [Formula: see text] and also invariants for transverse links through the trace tr[Formula: see text]. In order to compare the invariants for classical links with the Homflypt polynomial, we develop computer programs and we evaluate them on several Homflypt-equivalent pairs of knots and links. Our computations lead to the result that these invariants are topologically equivalent to the Homflypt polynomial on knots. However, they do not demonstrate the same behavior on links.
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Дворжак, В. М. "АНАЛІТИЧНЕ ДОСЛІДЖЕННЯ ДИНАМІКИ ТИПОВИХ КУЛІСНИХ МЕХАНІЗМІВ ТЕХНОЛОГІЧНИХ МАШИН ЛЕГКОЇ ПРОМИСЛОВОСТІ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 122, no. 3 (October 4, 2018): 9–18. http://dx.doi.org/10.30857/1813-6796.2018.3.1.
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Improving methods of designing technological machines mechanisms of light industry in CAD-programs. The analytical method of vector transformation of coordinates for calculation of typical mechanisms of technological machines and a numerical method for solving differential equations are used. Mathematical models describing the functions of the position of the moving links and the characteristic points of the multi-link mechanism of the thread take-up mechanism for the sewing machine and the dynamics of its operation are obtained. Schematic modeling of the mechanism in the Mathcad program was performed. The graphs of the dependence of the angular velocity and acceleration on time and on the angle of rotation of the crank mechanism. The algorithm of numerical and analytical investigation of the dynamics of the flat six-link articulated mechanism of the thread take-up of the sewing machine is proposed on the basis of the numerical solution of the differential equation of motion of the mechanism and a computer simulation of the mechanism in the program Mathcad. Practical Value is to use the results of research in kinematic and dynamic study of the target sewing machine mechanisms.
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Khang, Nguyen Van, and Vu Van Khiem. "Numerical evaluation of periodic transverse vibration of elastic connecting rods in a six-link mechanism." Vietnam Journal of Mechanics 19, no. 3 (September 30, 1997): 35–44. http://dx.doi.org/10.15625/0866-7136/10058.
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Application of the substructure method and d'Alembert's principle to deriving the differential equation of motion of a six-link mechanism with two elastic connecting rods is presented. In the case of stationary motion, the generalized Ritz's method has been applied to obtain system of linear differential equations with periodic coefficients. We have written computer programs to check conditions of dynamic stability and to find periodic solutions of the obtained equations. Numerical examples are given and from which the effect of elastic factors on articulation reactions is evaluated.
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Oakman, Jodi. "Beyond Coursework: Developing Communities in an Online Program of Study." Journal of Information Technology Education: Innovations in Practice 15 (2016): 167–79. http://dx.doi.org/10.28945/3587.
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The nexus between paid work and study is important. Developing opportunities to facilitate this link is a key part of good course design especially in postgraduate programs. Strong communities of practice can also assist with improving links between research and practice. The online study environment affords some challenges to achieving these goals. The current study proposes that offering formalised interaction points— synchronous or asynchronous— during online study, is critical to facilitating the link between work and study. Twenty-five graduates of a postgraduate program were interviewed to explore their experiences of an online program of study. Three key themes emerged and are described in this paper: engaging with study, building a new framework for my practice, and implementing changes to my practice. Online learning programs need to embed opportunities for interaction that are meaningful and allow for development of ideas and discussion, aiming to take learning beyond the program of study.
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Hartman, Amiel, and Vidya K. Nandikolla. "Human-Machine Interface for a Smart Wheelchair." Journal of Robotics 2019 (January 2, 2019): 1–11. http://dx.doi.org/10.1155/2019/4837058.
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The paper describes the integration of hardware and software with sensor technology and computer processing to develop the next generation intelligent wheelchair. The focus is a computer cluster design to test high performance computing for smart wheelchair operation and human interaction. The LabVIEW cluster is developed for real-time autonomous path planning and sensor data processing. Four small form factor computers are connected over a Gigabit Ethernet local area network to form the computer cluster. Autonomous programs are distributed across the cluster for increased task parallelism to improve processing time performance. The distributed programs operating frequency for path planning and motion control is 50Hz and 12.3Hz for 0.3 megapixel robot vision system. To monitor the operation and control of the distributed LabVIEW code, network automation is integrated into the cluster software along with a performance monitor. A link between the computer motion control program and the wheelchair joystick control of the drive train is developed for the computer control interface. A perception sensor array and control circuitry is integrated with the computer system to detect and respond to the wheelchair environment. Multiple cameras are used for image processing and scanning laser rangefinder sensors for obstacle avoidance in the cluster program. A centralized power system is integrated to power the smart wheelchair along with the cluster and sensor feedback system. The on board computer system is evaluated for cluster processing performance for the smart wheelchair, incorporating camera machine vision and LiDAR perception for terrain obstacle detection, operating in urban scenarios.
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Wu, Chiu Chin, Yii Wen Hwang, and Shu Hong Lin. "Dynamic Analysis and Simulation of Virtual Engine." Applied Mechanics and Materials 121-126 (October 2011): 3770–78. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3770.
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The purpose of this study was to establish a complete dynamic analysis method for motorcycle engines to serve as course material for study of machine dynamics. Virtual engine software was also developed for users to understand how engine performance is influenced by parameters such as engine accelerator, engine weight, and flywheel. First we applied the vector-loop approach to deduce the kinematic analysis of engine mechanism. We then applied Newton’s method to analyze the bearing force and friction of each link. Next, we used a power equation to deduce the equation of motion of the system, and used the Runge-Kutta method to perform normal dynamic analysis. Finally, by combining computer programs with the Open Graphics Library (OpenGL), we developed virtual engine software for users to observe motion and performance of engine. The results of this study provide engineers a computer-aided design program for automatic generation of all optimal pipes. It is beneficial to pipe design ability.
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Stith, Bradley J. "Use of Animation in Teaching Cell Biology." Cell Biology Education 3, no. 3 (September 2004): 181–88. http://dx.doi.org/10.1187/cbe.03-10-0018.
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To address the different learning styles of students, and because students can access animation from off-campus computers, the use of digital animation in teaching cell biology has become increasingly popular. Sample processes from cell biology that are more clearly presented in animation than in static illustrations are identified. The value of animation is evaluated on whether the process being taught involves motion, cellular location, or sequential order of numerous events. Computer programs for developing animation and animations associated with cell biology textbooks are reviewed, and links to specific examples of animation are given. Finally, future teaching tools for all fields of biology will increasingly benefit from an expansion of animation to the use of simulation. One purpose of this review is to encourage the widespread use of animations in biology teaching by discussing the nature of digital animation.
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Дворжак, В. М. "ЗАСТОСУВАННЯ МЕХАНІЗМУ ЧЕТВЕРТОГО КЛАСУ ДЛЯ ПРИВОДУ ВУШКОВИХ ГОЛОК ОСНОВОВ’ЯЗАЛЬНОЇ МАШИНИ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 146, no. 3 (January 11, 2021): 15–24. http://dx.doi.org/10.30857/1813-6796.2020.3.1.
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Development and research of functionally-adequate target mechanisms of technological machines of light industry with application of applied CAE-programs. Used the apparatus of vector algebra; analytical and numerical methods for determining the position functions of planar mechanisms containing a structural group of the fourth class of the second order, based on the vector transformation of coordinates; random search method for metric synthesis of flat mechanisms; methods of computer visualization and animation of kinematic schemes of flat mechanisms of higher classes. Mathematical models describing the position functions of the mechanism of eyelets of a warp knitting machine containing a structural group of the fourth class of the second order with rotating kinematic pairs in the form of angles of moving links, free vectors constructed on these links and radius vectors of characteristic points of the mechanism as a function of the angle of rotation of the master crank. The geometrical parameters of the flat six-link mechanism of eyelets for the warp knitting machine containing the structural group of the fourth class of the second order with rotating kinematic pairs as a result of metric synthesis of the mechanism by random search in CAE-program are determined; computer circuit modeling of the obtained mechanism is performed; graphs of visualization and animation of the kinematic scheme of the received mechanism are constructed; identification of the kinematic scheme of the obtained mechanism for compliance with the accepted structure; the received graph of function of position of an auricular needle of the mechanism of the fourth class; the functions of the position of the eye needle of the new mechanism and the mechanism of the basic knitting machine OV-7 are compared. The structure of a flat six-link mechanism, containing structural groups of the fourth class of the second order with rotating kinematic pairs, is proposed for use as a drive in a warp knitting machine on the example of the mechanism of oscillating movement of eyelets. The geometric dimensions of the moving parts of the functionally adequate mechanism of the fourth class for the drive of the eye needles of the basic knitting machine are determined. Software blocks for automated computer metric synthesis and calculation of link angles and radius vectors of characteristic points of the mechanism in the CAE program have been created. Practical Value is to use the results for the design and construction of flat mechanisms of the fourth class with rotating kinematic pairs of warp knitting machines, in which the working bodies make stops during the work process.
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Дворжак, В. М. "ЗАСТОСУВАННЯ МЕХАНІЗМУ ЧЕТВЕРТОГО КЛАСУ ДЛЯ ПРИВОДУ ВУШКОВИХ ГОЛОК ОСНОВОВ’ЯЗАЛЬНОЇ МАШИНИ." Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 146, no. 3 (January 11, 2021): 15–24. http://dx.doi.org/10.30857/1813-6796.2020.3.1.
Full textAbstract:
Development and research of functionally-adequate target mechanisms of technological machines of light industry with application of applied CAE-programs. Used the apparatus of vector algebra; analytical and numerical methods for determining the position functions of planar mechanisms containing a structural group of the fourth class of the second order, based on the vector transformation of coordinates; random search method for metric synthesis of flat mechanisms; methods of computer visualization and animation of kinematic schemes of flat mechanisms of higher classes. Mathematical models describing the position functions of the mechanism of eyelets of a warp knitting machine containing a structural group of the fourth class of the second order with rotating kinematic pairs in the form of angles of moving links, free vectors constructed on these links and radius vectors of characteristic points of the mechanism as a function of the angle of rotation of the master crank. The geometrical parameters of the flat six-link mechanism of eyelets for the warp knitting machine containing the structural group of the fourth class of the second order with rotating kinematic pairs as a result of metric synthesis of the mechanism by random search in CAE-program are determined; computer circuit modeling of the obtained mechanism is performed; graphs of visualization and animation of the kinematic scheme of the received mechanism are constructed; identification of the kinematic scheme of the obtained mechanism for compliance with the accepted structure; the received graph of function of position of an auricular needle of the mechanism of the fourth class; the functions of the position of the eye needle of the new mechanism and the mechanism of the basic knitting machine OV-7 are compared. The structure of a flat six-link mechanism, containing structural groups of the fourth class of the second order with rotating kinematic pairs, is proposed for use as a drive in a warp knitting machine on the example of the mechanism of oscillating movement of eyelets. The geometric dimensions of the moving parts of the functionally adequate mechanism of the fourth class for the drive of the eye needles of the basic knitting machine are determined. Software blocks for automated computer metric synthesis and calculation of link angles and radius vectors of characteristic points of the mechanism in the CAE program have been created. Practical Value is to use the results for the design and construction of flat mechanisms of the fourth class with rotating kinematic pairs of warp knitting machines, in which the working bodies make stops during the work process.
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ROMANENKO, Tetiana, and Nataliia RUSINA. "USE OF VISUAL PROGRAMMING LANGUAGE FOR SIMULATION OF DYNAMIC SYSTEMS." HERALD OF KHMELNYTSKYI NATIONAL UNIVERSITY 295, no. 2 (May 2021): 109–15. http://dx.doi.org/10.31891/2307-5732-2021-295-2-109-115.
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The article presents examples of research of typical links of linear systems and construction and study of transient functions, namely: research of influence of parameters of elements of systems of automatic control of its quality. Programs for automatic control are developing rapidly, the main areas of which are related to the optimization of technological processes and robotics. This encourages the introduction into modern production of high-precision digital systems with more extensive use of computer systems. In the simulation process, there is often a need to carefully select and apply real objects to study the quality of automatic control systems. This can be achieved by using a visual programming language for modeling dynamic systems and designing VisSim. The connection of parameters of automatic control systems with indicators of its quality is investigated: by definition of error coefficient; research of influence of a constant time of a forcing link on quality of automatic control systems by the method of compensation of the part in the main inertia of the control object, for the use of the forcing link. As a result, of research graphic dependences of quality of linear systems of automatic control, research of influence of a constant of time of a forcing link on its quality, carrying out identification of the regulator and object of management of systems of automatic control are received. Studies of the process of modeling dynamic systems were visually presented using the visual programming language VisSim. In particular, by creating virtual laboratory stands to study the quality of different modes of automatic control systems in relation to the performance of signal generators and the calculation of the necessary parameters of the study.
Dissertations / Theses on the topic "Links and link-motion – Computer programs"
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Demetriou, Christodoulos S. "A PC implemented kinematic synthesis system for planar linkages." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/101343.
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The purpose of this thesis is to develop a PC implemented kinematic synthesis system for four-bar and six-bar planar linkages using Turbo Pascal.
CYPRUS is an interactive program that calculates and displays graphically the designed four-bar and six-bar linkages. This package can be used for three and four position synthesis of path generation, path generation with input timing, body guidance, and body guidance with input timing linkages. The package can also be used for function generation linkages where the user may enter a set of angle pairs or choose one of the following functions: tangent, cosine, sine, exponential, logarithmic, and natural logarithmic. The above syntheses can be combined to design linkages that produce more complex motion.
For each kinematic synthesis case the code calculates a certain number of solutions. Then the designer chooses the most suitable solution for the particular application at hand. After a mechanism is synthesized, it can be animated for a check of the mechanical action. Watching this animation allows the designer to judge criteria such as clearances, forces, velocities and acceleration of the moving links.
The software operates on an IBM PC or any other PC compatible. The language used is Turbo Pascal, an extremely effective tool and one of the fastest high level languages in compilation and execution time.M.S.
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Bale, Siddalingaswamy. "Simulation of data link layer of communication protocols using Ada." Virtual Press, 1989. http://liblink.bsu.edu/uhtbin/catkey/722787.
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Communication and networking are vast areas which are developing rapidly. It is very important to know in detail how the system works, how it can be enhanced to meet today's requirement, how to implement the appropriate techniques to obtain desired results etc. To explain all of the above, simulation techniques were adopted. Simulation plays an important role in developming new designs and modifying existing systems to make them more feasible and efficient.Protocols are the back bones of the communication systems and play a major role in data transfer. The review of literature provides an explanation of ISO/OSI models, layered approach and concepts of simulation. The simulation was carried out to explain the concepts of error detection, error correction and flow control in Data Link layer. Ada was used to develop the software, because of its concurrent processing tools called tasks. Also state-of-the-art utilities like Vax/Vms Screen Management System, File Definition Language, and Debugger were us ed in the program development.Department of Computer Science
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Ramonyalioa, Thethe Tshepo. "Java implementation of AX.25 link-layer protocol for future micro-satellites." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53481.
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Thesis (MScEng)--University of Stellenbosch, 2003.ENGLISH ABSTRACT: This thesis investigates the viability of implementing the AX.25 protocol in Java, for satellite applications. The AX.25 protocol forms part of the Communications subsystem of a micro-satellite. It describes the implementation of a standard packet-radio link-layer communication protocol in Java, for future use on satellite on-board computers, allowing amongst other things, a reliable communications platform. An investigation into factors that make AX.25 preferable over other communication protocols, as well as advantages of Java as a language used in the implementation, is made. The design of the implementation is described. Finally, efficiency of the Java implementation is evaluated and optimizations identified and recommended.
AFRIKAANSE OPSOMMING: Hierdie tesis bespreek die lewensvatbaarheid van 'n Java implementering van die AX.25 protokol vir satelliet toepassings. AX.25 is deel van die kommunikasie stelsel van 'n mikro-satelliet. Dit beskryf die implementering van 'n standaard radio data kommunikasie intervlak in Java vir die toekomstige gebruik op die aanboord-rekenaarstelsels van satelliete. Hierdie intervlak bied, insluitende ander eienskappe, 'n betroubare kommunikasie platform. In Deeglike ondersoek na die faktore wat AX.25 meer aanloklik maak vir satellite toepassings is gemaak, asook hoe 'n Java implementering vergelyk met ander beskikbare tegnologie. Die geskiktheid van Java vir die implementering word ook bespeek in die lig van evaluerings wat gedoen is op die finale protokol.
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Simmons, Robert Andrew. "Control of a flexible link using a micro-stepper motor with acceleration feedback." 1985. http://hdl.handle.net/2097/27542.
Full textBooks on the topic "Links and link-motion – Computer programs"
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Wellman, Barry. Using SAS software to link personal network, tie and individual data: A novice's guide. Toronto: Centre for Urban and Community studies, University of Toronto, 1985.
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Creighton, James L. CyberMeeting: How to link people and technology in your organization. New York: AMACOM, 1998.
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Symphony Link. Cambridge, MA (55 Cambridge Parkway, Cambridge 02142): Lotus Development Corp., 1985.
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Creighton, James L., and James W. R. Adams. Cybermeeting: How to Link People and Technology in Your Organization. AMACOM/American Management Association, 1997.
Find full textBook chapters on the topic "Links and link-motion – Computer programs"
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Weik, Martin H. "link-attached network control program." In Computer Science and Communications Dictionary, 907. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_10361.
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Debray, Saumya, Robert Muth, and Scott Watterson. "Link-Time Improvement of Scheme Programs." In Lecture Notes in Computer Science, 76–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-540-49051-7_6.
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Chochliouros, Ioannis P., Avishay Mor, Konstantinos N. Voudouris, O. Amrani, and George Agapiou. "A Mobile Multi-hop Relay Base Station (MRBS) – Relay Station (RS) Link Level Performance of Coding/Modulation Schemes, on the Basis of the REWIND Research Program." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 93–102. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03819-8_10.
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Meyer, Thomas, and Christian Tschudin. "Robust Network Services with Distributed Code Rewriting." In Software Design and Development, 506–26. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4301-7.ch025.
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Nature does not know the concept of a dedicated controlling instance; instead, “control” is an emergent phenomenon. This is in stark contrast with computer networking where protocol control loops are (seemingly) in charge: while the functional aspect of a networking service can be well mastered, the dynamic behavior is still difficult to understand and even control. In this chapter, we present a methodology how to design distributed software systems that are dynamically stable and robust in execution. It is based on continuously replicating a system’s own code base in order to thwart unreliable execution and even accidental code changes. The crucial part is to design the system such that it regulates its own replication. This can be achieved by an execution environment inspired by chemistry to which we add the concept of self-rewriting programs (Quines). With a link load balancing example we show how to exploit competition and cooperation in a self-rewriting service implementation.
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Meyer, Thomas, and Christian Tschudin. "Robust Network Services with Distributed Code Rewriting." In Biologically Inspired Networking and Sensing, 36–57. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-61350-092-7.ch003.
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Nature does not know the concept of a dedicated controlling instance; instead, “control” is an emergent phenomenon. This is in stark contrast with computer networking where protocol control loops are (seemingly) in charge: while the functional aspect of a networking service can be well mastered, the dynamic behavior is still difficult to understand and even control. In this chapter, we present a methodology how to design distributed software systems that are dynamically stable and robust in execution. It is based on continuously replicating a system’s own code base in order to thwart unreliable execution and even accidental code changes. The crucial part is to design the system such that it regulates its own replication. This can be achieved by an execution environment inspired by chemistry to which we add the concept of self-rewriting programs (Quines). With a link load balancing example we show how to exploit competition and cooperation in a self-rewriting service implementation.
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Ghormley, Yvette. "Security Policies and Procedures." In Handbook of Research on Information Security and Assurance, 320–30. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-855-0.ch027.
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The number and severity of attacks on computer and information systems in the last two decades has steadily risen and mandates the use of security policies by organizations to protect digital as well as physical assets. Although the adoption and implementation of such policies still falls far short, progress is being made. Issues of management commitment, flexibility, structural informality, training, and compliance are among the obstacles that currently hinder greater and more comprehensive coverage for businesses. As security awareness and security-conscious cultures continue to grow, it is likely that research into better methodologies will increase with concomitant efficiency of security policy creation and implementation. However, attacks are becoming increasingly more sophisticated. While the human element is often the weakest link in security, much can be done to mitigate this problem provided security policies are kept focused and properly disseminated, and training and enforcement are applied.
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Starr-Glass, David. "E-Mentoring." In Handbook of Research on Education and Technology in a Changing Society, 935–52. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-6046-5.ch070.
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Mentoring involves the creation of a relational bond between a more and a less experienced person in order to advance the learning, socialization, and aspirations of the less experienced partner. Traditionally, mentoring has been conducted through face-to-face meetings, which promote optimal social connectedness, interpersonal attachment, and growing trust and confidence. The limited availability of local mentors, a desire for better mentor-mentee matching, and a concern for flexibility and inclusion have all resulted in attempts to distance the mentoring process. Electronic mentoring (e-mentoring), which uses computer-mediated communication technologies to link the partners, has provided logistical and pragmatic benefits. However, mentoring relies on strong relational bonds and social exchange dynamics, both of which are potentially weakened by social, psychological, and cognitive distance. This chapter explores the dynamics and process of mentoring and how these are altered in e-mentoring. Specifically, it examines transactional distance, distancing the locus of experience, and national culture differences between mentor and mentee. These impacts on e-mentoring are explored and recommendations for practice are presented, as are considerations for the future directions of e-mentoring in educational and organizational programs.
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Landman-Parker, Judith, and Françoise Montravers. "Hodgkin LymphomaModern Management of Children and Young Adults." In Oxford Textbook of Cancer in Children, 157–61. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198797210.003.0019.
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Hodgkin lymphoma (HL) is the most common cancer in adolescence and represents 15% of all cases of cancer in children and adolescents. In three decades, HL has become a highly curable lymphoid malignancy with an expected survival rate at ten years of around 90–93%. Further refinements of treatment strategy are needed in order to improve treatment results in relapsed and refractory patients and to reduce long-term morbidity of therapy, mainly secondary malignancies, cardiovascular early morbidity, and impaired fertility. Progress in imaging definition of involvement based on fluorodeoxyglucose-positron emission tomography (FDG-PET)/computed tomography (CT) and response-adapted strategy based on FDG-PET/CT intermediate evaluation has led to a reduction of radiotherapy. Procarbazine-free chemotherapy regimens with moderate anthracyclin dose will further reduce the risk of treatment’s sequelae. Recent advances in the understanding of the biology of HL have demonstrated, with promising results, the link between immune system control and Hodgkin lymphoma pathogenesis, opening the road to new treatments in relapsed and refractory patients based on targeted monoclonal antibodies.
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Broganza, Ashley. "Communities of Purpose." In Handbook of Research on ICT-Enabled Transformational Government, 197–212. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-390-6.ch011.
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The integration of organizational knowledge across functional communities is increasingly seen as important. The frameworks to do so are often referred to as a ‘higher order set of principles’ or as ‘overarching architectures.’ While recognizing these frameworks as a source of competitive advantage, this chapter underlines the importance of linking organizational knowledge to practice. At the operational level, actual practices are rarely aligned with canonical practices contained in manuals, training programmes, and computer systems. In this theoretical chapter we show that the divergence between actual and canonical practices is exacerbated by a number of communities of practice addressing conflicting stakeholder interests. It is the link between knowledge and actual practice that is of central interest to this chapter. Exploring this relationship necessitates a reexamination of the role of communities of practice and frameworks for bringing together conflicting stakeholder interests. Drawing upon literatures from knowledge management, communities of practice, stakeholder, and resource-based theory this chapter suggests an integrative Purposive Community metaframework. The proposed conceptual framework contributes to the resource-based view of the firm by linking organizational knowledge to actual practices and enhancing organizational capabilities by integrating diverse stakeholder interests and expectations through a shared common goal. Such a metaframework can enhance an organisation’s dynamic capability to respond to and create change in its external environment.
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Keats, Jonathon. "The Cloud." In Virtual Words. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195398540.003.0010.
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“It’s really just complete gibberish,” seethed Larry Ellison when asked about the cloud at a financial analysts’ conference in September 2008. “When is this idiocy going to stop?” By March 2009 the Oracle CEO had answered his own question, in a manner of speaking: in an earnings call to investors, Ellison brazenly peddled Oracle’s own forthcoming software as “cloud-computing ready.” Ellison’s capitulation was inevitable. The cloud is ubiquitous, the catchiest online metaphor since Tim Berners-Lee proposed “a way to link and access information of various kinds” at the European Organization for Nuclear Research (CERN) in 1990 and dubbed his creation the WorldWideWeb. In fact while many specific definitions of cloud computing have been advanced by companies seeking to capitalize on the cloud’s popularity—Dell even attempted to trademark the term, unsuccessfully—the cloud has most broadly come to stand for the web, a metaphor for a metaphor reminding us of how unfathomable our era’s signal invention has become. When Berners-Lee conceived the web his ideas were anything but cloudy. His inspiration was hypertext, developed by the computer pioneer Ted Nelson in the 1960s as a means of explicitly linking wide-ranging information in a nonhierarchical way. Nelson envisioned a “docuverse” which he described as “a unified environment available to everyone providing access to this whole space.” In 1980 Berners-Lee implemented this idea in a rudimentary way with a program called Enquire, which he used to cross-reference the software in CERN’s Proton Synchrotron control room. Over the following decade, machines such as the Proton Synchrotron threatened to swamp CERN with scientific data. Looking forward to the Large Hadron Collider, physicists began voicing concern about how they’d ever process their experiments, let alone productively share results with colleagues. Berners-Lee reckoned that, given wide enough implementation, hypertext might rescue them. He submitted a proposal in March 1989 for an “information mesh” accessible to the several thousand CERN employees. “Vague, but interesting,” his boss replied. Adequately encouraged, Berners-Lee spent the next year and a half struggling to refine his idea, and also to find a suitable name.
Conference papers on the topic "Links and link-motion – Computer programs"
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Mirth, John A. "Geometric Conditions for the Satisfaction of Order in Four Position Synthesis of Four-Bar Linkages." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0281.
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Abstract A mechanism that cannot pass through all precision positions in the correct sequence is said to violate the order condition. This paper establishes the order requirements for the precision position synthesis of all Grashof and non-Grashof four-bar linkages. These order requirements are based on three geometric characteristics of the four-bar mechanism: the angle of one of the rotating links that is attached to the ground link; the limits that the entire mechanism imposes on this rotating link; and the dyad configurations for the dyad that is opposite the ground pivot of this link. The results improve upon traditional discussions of the order problem by including all four-bar linkages, rather than just those of a specified Grashof type. A table summarizes the results in a form that allows for their implementation into computer programs for linkage design and analysis.
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Toogood, R. W. "Dynamics Equations of Robots Mounted on Moving Bases." In ASME 1991 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cie1991-0169.
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Abstract A number of programs have been developed for the automatic symbolic generation of efficient computer code for the dynamic analysis of serial rigid and flexible link manipulators. Code for both the inverse and the direct dynamics computations can be generated. The symbolic generators allow the robot base to be given an arbitrary linear acceleration anchor angular velocity and acceleration. The efficiency of the generated code is an important consideration for simulation studies and/or implementation in control systems. This paper briefly describes the symbolic generation and simplification techniques. The added computational load due to including the base motion is discussed. Some dynamics simulation results are presented for a 3R rigid link manipulator mounted on an oscillating base, which graphically illustrates the effect of the base movement on the dynamics.
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Hsieh, Chiu-Fan, Yii-Wen Hwang, and Hong-Sen Yan. "Generation and Sketching of Generalized Kinematic Chains." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49043.
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An algorithm of generalized kinematic chains and its computer program are developed in this paper. By this program, users can give the number of links and joints and then the link assortments and contracted link assortments can be calculated. The synthesis of multiple link adjacency matrix (MLAM) and the cut-link diagnosis are proposed to produce effectively the generalized kinematic chains. The algorithm can automatically determine the feature of a chain, which is connected, closed, non-isomorphism, without any cut-link (or cut-joint), and with simple joint only. Then, it can be called a generalized kinematic chain. Finally, various given number of links and joints, the nice looking atlas of generalized kinematic chains can also be generated. The developed computer program could help designers to be able to study and compare different devices in a very basic way.
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Yilmaz, Emin. "LabVIEW and Measure Foundry Based Data Acquisition System for Mechanical Engineering Technology Laboratories." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66652.
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Since the ASYST data acquisition and analysis software was discontinued and the old versions of ASYST do not support new computer operating systems and new data acquisition boards, old computer data acquisition (CDAQ) system is being replaced with a new data acquisition system. The new microcomputer based data acquisition system consists of an i-3 microcomputer with 3.0 GHz CPU and Windows-7 operating system, a Data Translation (DT) DT-304, 12-bit, 400 MHz data acquisition board with STP-300 screw terminal, Data Translation Measure Foundry (DT-MF) software and DT-LV link software [2], a National Instruments (NI) PCI-6250, M-series, low level, 16-bit, 1.25 MS/s board with 4-module SCC-68 I/O Connector Block, four thermocouple-input plug-in modules and NI LabVIEW (NI-LV) software [4]. Data Translation’s DT-LV software links DT boards with NI-LV software. Most ASYST-based data acquisition and analysis application programs used in Mechanical Engineering Technology (MET) courses have been converted to NI-LV and DT-MF application programs. Purpose of this paper is to describe how our old data acquisition application programs were converted to new data acquisition application programs so that they may be used with our new data acquisition system. Descriptions of the experiments, equipment used, and experiences gained with laboratory experiments are given elsewhere [8–13]. Specifically: Reference [8] covers upgrades made to the Materials Testing Laboratory, including Tinius-Olsen [14] tensile testing machine; reference [9] covers design and development of data acquisition programs for the materials testing, including Tensile Testing of Materials experiment; references [11] and [12] cover Heating Ventilating and Air Conditioning (HVAC) experiments and use of DAQ system in these experiments; reference [13] cover all uses of DAQ system in MET at University of Maryland Eastern Shore (UMES).
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Zheng, D., A. T. Vieira, and J. M. Jarvis. "An Assessment of Margin in Design Steam Hammer Forces for Combined Cycle Power Plants." In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26045.
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All combined cycle steam plants have rapid-closing stop valves in steam lines to protect the turbine. The rapid valve closure produces a steam hammer in the piping resulting in large forces for which the piping system and supporting structures need to be designed. These forces are typically calculated using the classical Method Of Characteristics (MOC) solution. An evaluation has been conducted which compares the forces computed using the classical methods with a best-estimate approach. This comparison has been done to define margin, and to benchmark and identify potential refinements in the techniques used for evaluating steam hammer loads. The best-estimate approach involves the use of the RELAP5 computer program. RELAP5 is used extensively in the Nuclear Industry to evaluate fast thermal hydraulic transients. It has the capability to analyze subcooled liquid, two-phase and saturated or superheated steam piping system. The models used in RELAP5 are best estimate results in comparison to the MOC solution which are mathematically derived from theory. The compressible flow program GAFT is used to obtain the MOC solution. The main steam line of a single Heat Recovery Steam Generator combined cycle plant is modeled with both the GAFT program and with a PC version of RELAP5. Identical piping lengths, mass flow rates, pressures are used in each model. Also, a stop valve closure time of 100 milliseconds is modeled. As RELAP5 output results are pressure, flow rate, velocity, and density, the resultant forces are generated using the R5FORCE program, a post-processor to compute associated transient forces on straight piping links. The GAFT program, which is specifically designed to compute steam hammer forces, computes the force history internally on straight piping lengths. A comparison of the peak force from GAFT and from RELAP for every piping link has been generated. Through the comparison, both RELAP5 and GAFT have been verified for the evaluation of rapid valve closure reaction loads. The comparison also shows that the classical method typically over-predicts the best-estimate solution by 15% to 20% for straight piping links. Although not confirmed, a better agreement between the two methods would be expected if a more accurate steam sonic velocity correlation and valve closure model are incorporated into the classical solution. Theis study helps to quantify the degree of conservatism inherent in the classical approach.
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El-Gayyar, M. S., H. M. El-Eashy, and M. Zaki. "Structural Synthesis and Enumeration of Epicyclic Gear Mechanisms Up to 12-Links Using Acyclic Graph Method." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-91136.
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In this paper, a new approach for graphical enumeration of epicyclic gear mechanisms is presented using the concept of acyclic graph. A new graphical code has been introduced to specify the priorities of all vertices of associated displacement graph. This graphical code is used to identify open graph, redundant links and isomorphic graphs. A computer program has been developed for automatic enumeration of displacement graphs as well as automatic detection of isomorphic graphs and open graphs and graphs with a redundant link without using adjacency matrices. This simplified methodology has been applied for the enumeration of epicyclic gear mechanisms with up to 12-links having up to 9 coaxial links. An atlas for 11 and 12-link mechanisms has been constructed using the proposed methodology.
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Kurnool, Sirihari, and Cemil Bagci. "Elastodynamics of Horizontally Body-Guiding Cam-Driven Linkages Interacting With Robots, and Elastic Error Compensation for Robot Positioning." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/mech-1174.
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Abstract Common industrial applications of body-guiding linkages occur with robot (or CNC machine) interaction at workstations in automated production and assembly lines in industry. A linkage in such cases is generally operated horizontally where large deflections at the body location occur creating positioning and orientation errors of the body. These errors must be delivered to the interacting robot to program its motions and operating geometries to eliminate effects of errors on the performed tasks at the workstations. Driving the linkage at high speed, generating dwells at workstations, experiencing efficient dynamic behaviors is an important phase of its design. In this article, a four-bar linkage guides the body. A disk cam with translating roller follower drives a slider-crank loop driving the body guiding linkage providing dynamically efficient motion of the guided-body along its path and the mechanism. Processes of programming motion of the rigid-body along its path, obtaining the corresponding motions of the links of the mechanism, designing the cam-follower mechanism, determnine elastic errors and their correction and minimization, and performing the elastodynamics of the system are offered. A three-dimensional isoparametric beam element and matrix exponential method are used to perform the elastodynamics of the cam-link mechanism, determining dynamic stresses, elastic errors, bearing forces, frequencies, and response with and without vibratory motion effects, and furnishing data for the interacting robot. Numerical results for a system are given.
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Narvaez-Aroche, Octavio, Andrew Packard, and Murat Arcak. "Motion Planning of the Sit to Stand Movement for Powered Lower Limb Orthoses." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5289.
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We propose a generalizable strategy for planning the sit to stand movement of a powered lower limb orthosis and its user. Modeling the system as a three rigid link planar robot, we rely on its kinematic equations to obtain a set of transformations that allows us to compute reference trajectories for the angular positions of the links, starting from a desired kinematic behavior for the center of mass of the robot and the angular position of link 2 relative to link 1; as we consider them more suitable to define for achieving a safe sit to stand transition. We then proceed to design a tracking controller via feedback linearization and solve a constrained least-squares program to address the control allocation problem from including the loads applied by the arms of the user as inputs. We simulate two relevant STS movements to illustrate the system tracking the reference trajectories generated with our strategy, in the presence of parameter uncertainty.
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Yoo, Wan-Suk, Jeong-Hyun Sohn, O.-kaung Lim, and Keum-Shik Hong. "Velocity Transformation Matrix of a Revolute-Spherical Massless Link." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21336.
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Abstract Since the contribution of lightweight components in the total energy of a system is small, the inertia effects are sometimes ignored via replacing them to massless links. A massless link, which is sometimes called as a composite joint, connects two adjacent bodies keeping the relative degrees of freedoms. For a revolute-spherical massless link, one edge is connected to an adjacent body with a revolute joint and the other edge is linked to another body with a spherical joint. Using velocity transformation technique, it is possible to combine the generality of Cartesian coordinates in modeling and the efficiency of relative coordinates in simulation. In this paper, velocity transformation matrix of a revolute-spherical massless link is formulated and implemented as a joint module in a vehicle dynamic analysis program. Numerical examples are presented to verify the formulation.
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Ibekwe, Achinike, Kjeld Sorensen, Jonathan Fernández, Alberto Arredondo, and Alex Mena. "Remnant Life Assessment of Bonga FPSO and SPM Mooring Chains." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77941.
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Delivering full service life performance for mooring systems of Floating Production Storage & Offloading assets (FPSO) has been a frustrating challenge to operators across the industry. Remaining strength and fatigue assessment on degraded top mooring chains of the Bonga FPSO and Single Point Mooring (SPM) loading Buoy has been investigated as part of an in-house Bonga Asset Preservation Program. Both facilities are located approximately 120 km off the coast of Nigeria in the Gulf of Guinea operating in tropical waters just North of the Equator, where top chain links have been subjected to accelerated deterioration from Sun Corals and other forms of Microbiologically Induced Corrosion (MIC). These phenomena have led to overall corrosion rates being slightly above general design requirements, but more importantly to formations of large pitting on several sections of the top chain links. Remotely Operated Vehicles (ROV) assisted inspections, chain link cleaning and underwater 3D photogrammetry have allowed capturing the surface geometry of representative degraded chain links of the mooring lines to provide detailed input data for further analyses. Reverse engineering has been performed via Finite Element Analysis and fracture mechanics methodologies using the scanned geometry of selected highly exposed critical links to estimate the residual strength and fatigue life performance of the degraded links relative to their original design criteria. To evaluate the potential impact of cracks on the capacity of degraded chains relative to a reference link, crack tip Stress Intensity Factors have been computed at worst case stress-raising pits and parametric analyses using varying initial crack sizes have been performed to calculate the number of years for the cracks to propagate to critical sizes. A baseline for benchmarking the strength, fatigue and crack growth behaviour of the degraded links investigated has been provided by analysing non-degraded and uniformly corroded links after 12 years of service with projection to end of service life capacity. The paper provides a comprehensive application of numerical methods for assessing the fitness-for-service of the chains and recommendations on in-situ performance integrity management by circumventing the need to retrieve chain samples for testing.