New three-dimensional (3D) magnetic resonance imaging (MRI) methods for measuring the tendon moment arm were created and were evaluated on the tendon moment arm of the flexor digitorum profundus at the third metacarpophalangeal joint. Using an open magnet MRI system and a hand holder, a series of static images were acquired at four joint angles and analyzed using specially created computer programs. Three methods were evaluated: (1) a 3D tendon excursion method that extended the method of Landsmeer; (2) a 3D geometric method whereby the moment arm was the perpendicular distance between the joint axis of rotation and the tendon path, and (3) a two-dimensional (2D) geometric method whereby single image slices were analyzed. Repeating the imaging and measurement processes, the 3D tendon excursion method was more reproducible (6% variation) than the 3D geometric method (12%), and both were much more reproducible than the 2D geometric method (27%). By having three operators analyze a single set of image data, we found that the precision of the 3D tendon excursion method was much less affected by segmentation error than the 3D geometric method. With the 3D imaging methods, tendon bowstringing and a displacement of the joint center of rotation toward the dorsal side of the hand were evident, leading to as much as a 60% increase in moment arm with joint flexion. Because of the dependence on flexion and variation between subjects, we recommend patient-specific measurements for target applications in functional neuromuscular stimulation interventions and tendon transfer surgery.
China's urban land reform is a gradualist process of transforming a planned land allocation system to an open land market system, while the ownership of the land remains under the control of the state. This process defines the relationships between local government and emerging non-public interest groups in the land development process. These issues can be most clearly seen in the State-Approved Development Zones, where municipalities have been encouraged to promote economic
development and test out land policy initiatives. Using the institutionalist and urban growth machine analytical approaches to land development processes, this study examines the operation of development processes and the role of local government and its relationship with other interest groups. By employing a case study research strategy, focused upon the Hangzhou High-Technology Zone, the study uncovered a local government-led growth coalition which featured participation by other interest groups and revealed the applicability and variations when applying two strands of theories to a socialist economy in transition. Besides the land reform policy implications drawn from the case study evidence, the study concludes that the presence of interest groups and the missing community organisations unique to China give new theoretical implications and that both theories work much better with the economic domain than with the political domain largely because of a lagged political reform.Figure 2. Binjiang District and Hangzhou High-Technology Industry Zone (defined by bold lines) Source: http://www.hangzhou.gov.cn (revised by the author).
China's urban land reform
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