Disorientation in Minimal Access Surgery: A Case Study

2000 ◽  
Vol 44 (26) ◽  
pp. 169-172 ◽  
Author(s):  
Caroline G.L. Cao ◽  
Paul Milgram
Keyword(s):  
Sigmoid Colon ◽  
Spatial Orientation ◽  
Human Colon ◽  
Minimal Access ◽  
Cognitive Constraints ◽  
Getting Lost ◽  
Global And Local ◽  
Access Surgery ◽  
And Training

Navigating through minimal access surgical environments such as the human colon can be difficult, even for expert gastroenterologists. “Getting lost” is a common experience for endoscopists, especially within the tortuous sigmoid colon where salient landmarks are not generally available. This paper presents the concept of “getting lost” in endoscoppy as a loss of both global and local spatial orientation. For the endoscopist performing a colonoscopy, the consequence of local disorientation is an inability to continue the procedure, or possibly even injury to the patient, while consequences of global disorientation can be mistaking the location of a lesion, and/or incomplete examination, resulting in misdiagnosis. This study provides important insights into the physical and cognitive constraints of the task of navigating in colonoscopy, contributing to disorientation in the colon. The implications of our findings for the design of navigational aids and training tools are also discussed.

Observation and Records of Spatial Behavior For Wayfinding: A Case Study in a Hospital Built Environment

2020 ◽  
Vol 64 (1) ◽  
pp. 516-520
Author(s):  
Márcia M. Rangel ◽  
Claudia Mont’Alvão
Keyword(s):  
Data Collection ◽  
Built Environment ◽  
Spatial Orientation ◽  
User Behavior ◽  
Spatial Behavior ◽  
Unknown Environments ◽  
Getting Lost ◽  
Visibility Index ◽  
Maximum Measurement

Autonomous and intuitive displacement is a parameter to verify the potential of information for spatial orientation in a built environment. Being oriented implies not getting lost on the route linked to a task, both in known or unknown environments. This topic is a maximum measurement of a user's behavior in their displacement. First, some main concepts will be presented, proposing some indicators for users’observation in the built environment. After that, a case study will be presented, using the indicators that are proposed based on the task, routes, strategies, and user behavior for a data collection. As a result, this data was checked with the Visibility Index (VI) method.

scholarly journals Path Planning for Autonomous Ships: A Hybrid Approach Based on Improved APF and Modified VO Methods

2021 ◽  
Vol 9 (7) ◽  
pp. 761
Author(s):  
Liang Zhang ◽  
Junmin Mou ◽  
Pengfei Chen ◽  
Mengxia Li
Keyword(s):  
Path Planning ◽  
Local Minimum ◽  
Hybrid Approach ◽  
Artificial Potential Field ◽  
Whole Process ◽  
International Regulations ◽  
Local Path ◽  
Velocity Obstacle ◽  
Global And Local

In this research, a hybrid approach for path planning of autonomous ships that generates both global and local paths, respectively, is proposed. The global path is obtained via an improved artificial potential field (APF) method, which makes up for the shortcoming that the typical APF method easily falls into a local minimum. A modified velocity obstacle (VO) method that incorporates the closest point of approach (CPA) model and the International Regulations for Preventing Collisions at Sea (COLREGS), based on the typical VO method, can be used to get the local path. The contribution of this research is two-fold: (1) improvement of the typical APF and VO methods, making up for previous shortcomings, and integrated COLREGS rules and good seamanship, making the paths obtained more in line with navigation practice; (2) the research included global and local path planning, considering both the safety and maneuverability of the ship in the process of avoiding collision, and studied the whole process of avoiding collision in a relatively entirely way. A case study was then conducted to test the proposed approach in different situations. The results indicate that the proposed approach can find both global and local paths to avoid the target ship.

scholarly journals Digital Tools as an Enabler for Educational and Training Processes: The Case Study of REFUGEEClassAssistance4 Teachers Project

Proceedings ◽  
2021 ◽  
Vol 74 (1) ◽  
pp. 14
Author(s):  
Ourania Areta ◽  
Karel Van Isacker
Keyword(s):  
Social Interactions ◽  
Education And Training ◽  
Working Environment ◽  
Digital Tools ◽  
Training Process ◽  
Training Activities ◽  
And Training

Digitalization has transformed all aspects of life, from social interactions to the working environment and education, something that accelerated with the emergence of COVID-19. The same stands for education and training activities, where the use of digital tools has been gradually advancing and become merely online because of the virus. This brought forth the need to discuss further the applications, benefits, and challenges of digital tools within the framework of the education and training process, and the need to study examples of successful applications. This study aims to support both these requirements by presenting the case study of REFUGEEClassAssistance4Teachers project and its outcomes.

scholarly journals The Ecuadorian Banana Farms Managers’ Perceptions: Innovation as a Driver of Environmental Sustainability Practices

Agriculture ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 213
Author(s):  
Alicia Ramírez-Orellana ◽  
Daniel Ruiz-Palomo ◽  
Alfonso Rojo-Ramírez ◽  
John E. Burgos-Burgos
Keyword(s):  
Information Systems ◽  
Environmental Sustainability ◽  
Structural Equation ◽  
Equation Modeling ◽  
Environmental Practices ◽  
Sustainability Practices ◽  
Policy Incentives ◽  
The Impact ◽  
And Training

This article aims to explore the perceptions of banana farms managers towards environmental sustainability practices through the impact of innovation, adoption of information systems, and training employees through a case study in the province of El Oro (Ecuador). Furthermore, the paper assesses how farmers’ perceptions could guide public policy incentives. PLS-Structural Equation Modeling are used as the framework by which the constructs is represented within the model. The model explained 59% of the environmental sustainability practices of Ecuadorian banana farms. The results indicate that environmental sustainability practices were positively influenced mainly by training employees, innovation, and adoption of information systems. Additionally, both the adoption of information systems and training employees indirectly influenced sustainable practices through innovation as a mediator. We may conclude that in the Ecuadorian banana farms, changes in environmental practices are derived from innovation strategies as an axis of development of useful information and training employees in public policies.

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