Manchester Metropolitan University

About: Manchester Metropolitan University is a education organization based out in Manchester, Manchester, United Kingdom. It is known for research contribution in the topics: Population & Context (language use). The organization has 5435 authors who have published 16202 publications receiving 442561 citations. The organization is also known as: Manchester Polytechnic & MMU.

The proprioceptive and agonist roles of gastrocnemius, soleus and tibialis anterior muscles in maintaining human upright posture

Abstract: Humans can stand using sensory information solely from the ankle muscles. Muscle length and tension in the calf muscles (gastrocnemius and soleus) are unlikely to signal postural sways on account of balance-related modulation in agonist activity. These facts pose two questions: (1) Which ankle muscles provide the proprioceptive information? (2) Which peripheral mechanism could modulate agonist activity? To address these issues, subjects were asked to stand normally on two force plates. Ultrasound and surface EMG were recorded from the calf and tibialis anterior (TA) muscles. For all nine subjects, changes in muscle length of TA were mainly (84 ± 9% whole trial duration) orthodoxly correlated with bodily sway (centre of gravity, CoG), i.e. in accordance with passive ankle rotation. When orthodox, TA had the highest correlation with CoG (−0.66 ± 0.07, deep compartment, P < 0.001). For five subjects, the superficial TA compartment showed counter-intuitive changes in muscle length with CoG, probably due to the flattening of the foot and proximal attachment geometry. Gastrocnemius and soleus were usually (duration 71 ± 23 and 81 ± 16%, respectively) active agonists (paradoxically correlated with CoG) but, for short periods of time, they could be orthodox and then presented a moderate correlation (0.38 ± 0.16 and 0.28 ± 0.09, respectively) with CoG. Considering the duration and extent to which muscle length is orthodox and correlated with CoG, TA may be a better source of proprioceptive information than the active agonists (soleus and gastrocnemius). Therefore, if a peripheral feedback mechanism modulates agonist activity then reciprocal inhibition acted by TA on the calf muscles is more likely to be effective than the autogenic pathway.

The naked truth of celebrity endorsement

Abstract: This case study examines the use of celebrity endorsement in the formation of the retail image of leading European grocery distribution group J. Sainsbury, in particular, the process of transference of celebrity images to the product’s image. The incorporation of Jamie Oliver (well known as television celebrity The Naked Chef) into the promotions of one of Britain’s leading grocery chains involves a high profile campaign that has been adopted in order to imbue the company’s products with an image of quality. The success of the campaign has been replicated in New Zealand by another grocery retail “giant”, Foodstuffs, who have also adopted The Naked Chef to endorse their products. The case draws on field research with consumers and key informant interviews with advertising agency personnel who identified the criterion for the choice of Jamie Oliver. The extent to which the market place recognises and consumers associate themselves with the image Jamie projects as a celebrity endorser for J. Sainsbury is explored.

In vivo specific tension of human skeletal muscle.

Abstract: In this study, we estimated the specific tensions of soleus (Sol) and tibialis anterior (TA) muscles in six men. Joint moments were measured during maximum voluntary contraction (MVC) and during el...

Coordination of active steering, driveline, and braking for integrated vehicle dynamics control

Abstract: An integrated vehicle dynamics control system which aims to improve vehicle handling and stability by coordinating active front steering (AFS) and dynamic stability control (DSC) subsystems is developed in this paper. The DSC subsystem includes driveline-based, brake-based, and driveline plus brake-based DSC subsystems. The influence of varying forward speed and lateral acceleration on the lateral vehicle dynamics is investigated first. The AFS controller, which is used to improve vehicle steerability in the low to mid-range lateral acceleration, and the DSC controller, which manages to maintain vehicle stability during extreme driving situations, are then designed by using the sliding mode control (SMC) technique and phase plane method respectively. Based on the two independently developed controllers, a rule-based integration scheme is proposed to optimize the overall vehicle performance by minimizing interactions between the two subsystems and extending functionalities of individual subsystems. Computer simulation results confirm the effectiveness of the proposed control system and the overall improvements in vehicle handling and stability.

A methodology for automatic term recognition

Abstract: The topic of automatic term recognition (ATR) is of great interest especially with the growth of NLP systems, which are passing from the development stage to the application stage. The application of NLP technology involves customlsing systems towards specific needs, particularly in specialised domains (sublanguages) which form the main target of the technology~ There is thus an urgent need for high quality, large scale collections of terminologies (with associated linguistic information) for use in NLP system dictionaries.