?? MACHINE DYNAMICS CASE STUDY Aim: To conduct a full kinematic analysis and calculate the dynamic reaction forces in a linkage mechanism, and to present the results of the case study in a clear reporting format. Introduction: The above figure depicts a frictionless slider linkage mechanism, consisting of 2 homogenous rigid rods, OA and AB . At the instant shown, rocker OA is subjected to torque T and has constant clockwise angular velocity OA ??. The rods have masses OA m and AB m, and the slider has mass B m . The weight of all rigid bodies can be ignored in all calculations. To design the mechanism, a careful kinematic analysis of the mechanism needs to be conducted. Moreover, the reaction forces acting within the joints need to be analysed to avoid mechanical failure. Tasks: At the instant shown in the figure, perform the following tasks using the individually assigned values of lengths OA, AB , h , angle 1 ??, angular velocity OA ??, and masses OA m , AB m , B m - these can be found in OA (m) AB (m) h (m) ?1 (deg) ?OA (rad/s) mOA (kg) mAB (kg) mB (kg) 0.45 0.32 0.48 37 10 0.3 1.1 0.8 All calculations should be included in the report. Please use the notation defined in the above figure when reporting the results from your calculations. A. Geometric Calculations: Determine: (1) Horizontal displacement z . (2) Angle ?2. B. Velocity Analysis: Determine the magnitude and direction of: (1) Velocity of point A . (2) Angular velocity for rod AB . (3) Velocity of point B . [20] C. Acceleration Analysis: Determine the magnitude and direction of: (1) Acceleration of point A . (2) Angular acceleration for rod AB . (3) Acceleration of slider B . (4) Acceleration of mass centre for OA. (5) Acceleration of mass centre for AB [30] D. Dynamic Analysis: (1) Sketch a clear free-body diagram for each rod and the slider, taking care to show all forces (including pin reaction forces) and accelerations for all mass centres. (2) Using D’Alemberts Principle (or otherwise), calculate the instantaneous torque T required to drive the mechanism at the instant shown. [30] An additional 10 marks are available for well written reports. These marks will be awarded to students who submit a concise report, containing the requested information with a clear presentation of numerical results and diagrams. Lengthy reports that contain large amounts of repetition, trivial results and/or poor diagrams are unlikely to attract any of these marks.
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what impact does charismatic leadership To what degree do you believe that employees and individuals desire or seek out charismatic leaders? After having read this week’s textbook section and journal article, what impact does charismatic leadership have in improving performance of individuals as well as the accomplishment of organisational goals? Samnani, A. & Singh, P. (2013) ‘When leaders victimize: The role of charismatic leaders in facilitating group pressures’, Leadership Quarterly 24 (1), pp. 189-202. http://www.sciencedirect.com.ezproxy.liv.ac.uk/science/article/pii/S1048984312000951 Textbook Northouse, P.G. (2010) Leadership: Theory and practice 5th ed. London: Sage. (Please note that the references to these readings can be found in the Lecture Notes text under the headings of the topics to which they relate.) Read the chapter titled ‘Transformational Leadership’. • Charismatic leaders This selection examines the characteristics that charismatic leaders possess and what impact this trait has on those around them. Charismatic leaders tend to seem more emotionally intelligent about situations and therefore able to tap into underlying needs and motivations of people. • Transformational leadership This selection investigates the transformative theoretical approach which is the process of influencing change in individuals, groups, and larger organizations. The theory contributes greatly to the understanding of the cognitive and affective processes involved with motivation. • Evaluation of the transformational approach This selection discusses the traits of the transformational approach theory. Although this approach may paint leaders in a heroic light, sceptics believe that the traits of these leaders cannot be taught. You will look at the benefits and drawbacks of this approach. Read the chapter titled ‘Team Leadership’. • The team leadership model This selection investigates the idea of leadership shifting from the leader to the follower and the process for achieving goals. This idea of team leadership has gained momentum in recent years, but has come into question because many of the team leadership functions have remained unsupported by research findings. • Leadership action and team effectiveness This selection introduces the functions that are recommended for leaders to build team effectiveness. In this approach there are two main actions for leaders to undertake; task accomplishment and maintenance of the team. Supplemental Resources ‘Charismatic Leadership’ http://changingminds.org/disciplines/leadership/styles/charismatic_leadership.htm ‘Leading Without Authority’ http://www.joe.org/joe/1996october/a3.php ‘Requirements of a Self-Managed Team Leader’ http://www.leader-values.com/article.php?aid=722 ‘Team Effectiveness and Leadership Roles’ http://mpra.ub.uni-muenchen.de/7245/1/MPRA_paper_7245.pdf
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1.Who makes the decisions in the family holiday-taking decision-making process? Critically evaluate this question by means of a detailed literature review. this is the reading list for start the essay. Bronner, F., and R. de Hoog. (2008). “Agreement and disagreement in family vacation decision-making”. Tourism Management, 29: 967-979. Decrop, A., and D. Snelders. (2004). “Planning the summer vacation. An adaptable process”. Annals of Tourism Research, 31(4): 1008-1030. Hunter-Jones, P. (2014). “Changing family structures and childhood socialisation: a study of leisure consumption”. Journal of Marketing Management, 30:1533-1553. Kang, S. K., and C.H.C. Hsu. (2005). “Dyadic consensus on family vacation destination selection”. Tourism Management, 26(4): 571-582. Kozak, M. (2010). “Holiday taking decisions – the role of spouses”. Tourism Management, 31(4): 489-494. Thornton, P., Shaw, G., and A. Williams. (1997). “Tourist group holiday decision-making and behaviour: the influence of children”. Tourism Management, 18(5): 287-297. Wang, K-C., Hsieh, A-T., Yeh, Y-C., and C-W. Tsai. (2004). “Who is the decision-maker: the parents or the child in group package tours?” Tourism Management, 25(2): 183-194. Remember alongside the recommended reading list for the module we have access to excellent journal coverage. I would encourage you to consider articles published in: 1.Tourism Management 2.Annals of Tourism Research 3.Journal of Travel Research 4.Journal of Sustainable Tourism 5.International Journal of Tourism Research 6.Current Issues in Tourism
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