Navigation support for old and handicapped persons in urban regions

2015 ◽  
Author(s):  
Alfred Iwainsky
Keyword(s):  
Urban Regions ◽  
Navigation Support

Urbane Ökonomien in Deutschland

2004 ◽  
Vol 48 (1) ◽  
Author(s):  
Stefan Krätke
Keyword(s):  
Service Providers ◽  
Urban System ◽  
Economic Activities ◽  
Industrial Growth ◽  
Urban Economies ◽  
Urban Regions ◽  
Urban Economic ◽  
Development Factor ◽  
Knowledge Intensive ◽  
Media Firms

Urban economies in Germany. Cluster potential and global interconnections. Urban economies are the leading locational centres of corporate headquarters, advanced producer services, the media sector, research and development, particular “knowledge-intensive” activity branches of the economy and innovative industrial growth sectors. The urban regions might be characterized as heterogenous agglomerations of economic activities, which include a number of sub-economies with different functions and forms of organisation.The urban regions’ economic potential reveils specific differences with regard to the large urban economic centres in West- and East-Germany. The different positions of particular urban economic centres in Germany and Europe as ancoring points of global firms’ organizational networks are being indicated with regard to global service providers and global media firms, emphasizing the global interconnections as an important development factor particularly in the metropoles of the urban system.

scholarly journals Laparoscopic augmented reality registration for oncological resection site repair

2021 ◽  
Author(s):  
Fabian Joeres ◽  
Tonia Mielke ◽  
Christian Hansen
Keyword(s):  
Augmented Reality ◽  
Time Pressure ◽  
Tumour Resection ◽  
Anatomical Landmarks ◽  
Proof Of Concept ◽  
Registration Accuracy ◽  
Target Registration Error ◽  
Concept Evaluation ◽  
Navigation Support ◽  
Challenges And Opportunities

Abstract Purpose Resection site repair during laparoscopic oncological surgery (e.g. laparoscopic partial nephrectomy) poses some unique challenges and opportunities for augmented reality (AR) navigation support. This work introduces an AR registration workflow that addresses the time pressure that is present during resection site repair. Methods We propose a two-step registration process: the AR content is registered as accurately as possible prior to the tumour resection (the primary registration). This accurate registration is used to apply artificial fiducials to the physical organ and the virtual model. After the resection, these fiducials can be used for rapid re-registration (the secondary registration). We tested this pipeline in a simulated-use study with $$N=18$$ N = 18 participants. We compared the registration accuracy and speed for our method and for landmark-based registration as a reference. Results Acquisition of and, thereby, registration with the artificial fiducials were significantly faster than the initial use of anatomical landmarks. Our method also had a trend to be more accurate in cases in which the primary registration was successful. The accuracy loss between the elaborate primary registration and the rapid secondary registration could be quantified with a mean target registration error increase of 2.35 mm. Conclusion This work introduces a registration pipeline for AR navigation support during laparoscopic resection site repair and provides a successful proof-of-concept evaluation thereof. Our results indicate that the concept is better suited than landmark-based registration during this phase, but further work is required to demonstrate clinical suitability and applicability.

scholarly journals Bringing sustainable urban planning down to earth through food: the experience of the food transects of Grenoble and Caen

2021 ◽  
Author(s):  
Jennifer Buyck ◽  
Aurore Meyfroidt ◽  
Caroline Brand ◽  
Gabriel Jourdan
Keyword(s):  
Urban Planning ◽  
Participatory Research ◽  
Metropolitan Areas ◽  
Urban Regions

AbstractOur contribution aims at pointing out how the food issue challenges metropolitan areas while at the same time identifying potential for sustainable urban planning. To that end, we investigate to what extent taking into account agricultural and food-related issues enables to rethink urban planning which is usually qualified as sustainable. Our analysis will be based upon the two French urban regions of Grenoble and Caen where participatory research was conducted through collective and prospective walks. These urban explorations, which provide insights on metropolitan spaces and the interrelations that underlie them, underly the disconnections of contemporary urban planning with the inhabitants, their vital needs and, more generally, the soil, while highlight working paths for a more nourishing, meaningful and rooted urban planning. By considering urban planning through the scope of agri-food stakes, we contribute then to the renewal of urban concepts and thus highlight three workshops aiming at further developing sustainable urban planning issues and tools.

Evacuation-Based Design of Urban Regions for Earthquake Disaster

2017 ◽  
Vol 16 (7) ◽  
pp. 769-782 ◽  
Author(s):  
Yashar Nasrollahi ◽  
Behrouz Behnam
Keyword(s):  
Earthquake Disaster ◽  
Urban Regions
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