High order vector-scalar finite elements for curved-triangle meshes are developed. These elements are applied to problems in which the variation of field along one coordinate is known. The field component along this c...
High order vector-scalar finite elements for curved-triangle meshes are developed. These elements are applied to problems in which the variation of field along one coordinate is known. The field component along this coordinate is modeled with polynomials of degree q. The transverse component is modelled with 2-D vector edge elements containing all irrotational functions up to polynomial degree m. Only when q=m+\ spurious modes are avoided. The performance of these elements to order 4 is explored by applying them to some structures containing sharp edges and/or curved boundaries.
Patient-controlled analgesia (PCA) treatment for post-operative pain management is commonly employed in hospitals and its usage is steadily increasing. However, despite the apparent "inherent" safety strateg...
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Patient-controlled analgesia (PCA) treatment for post-operative pain management is commonly employed in hospitals and its usage is steadily increasing. However, despite the apparent "inherent" safety strategy of requiring active participation of the patient to administer each opioid dose, adverse drug events have been reported. The major reasons for the adverse events are factors such as pump programming errors, patient risk factors, human interactions, equipment malfunctions and drug prescription errors. These conditions can lead to situations where patients develop severe complications such as respiratory depression due to overmedication. Another significant aspect to be addressed is the requirement for interoperability of medical devices connected to the patient for diagnosis and therapy, which can mitigate some of the cited problems and result in enhancement of patient safety and treatment efficacy. The objective of the proposed study is to develop requirements for an interoperable system that prevents the occurrence of respiratory depression due to adverse drug events experienced while using a PCA pump. A system of networked medical devices is being proposed to continuously monitor patients on PCA systems to detect evidence of deteriorating respiratory functions or similar critical states, and then to activate a safety interlock to suspend the medication delivery if the cause of the patient state is attributed to overmedication, and to activate the nurse-call system to initiate a prompt assessment by clinicians.
In recent years, the amount of Internet accessible digital audiovisual media files has vastly increased. Therefore the need to describe the media (by way of metadata) has also increased significantly. MPEG-7 (finalize...
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In recent years, the amount of Internet accessible digital audiovisual media files has vastly increased. Therefore the need to describe the media (by way of metadata) has also increased significantly. MPEG-7 (finalized in 2001) provides a comprehensive and rich metadata standard for the description of multimedia content. Unfortunately, a standardized query format does not exist for MPEG-7, or other multimedia metadata. Such a standard would provide for communications between querying clients and databases, supporting cross-modal and cross-media retrieval. The lSO/lEC SC29WG11 committee decided therefore to contribute to this application space by adding such functionality as a new part of the MPEG-7 series of standards. In response to a Call for Proposals, six proposals were submitted. This paper describes the strengths of each proposal as well as the resulting draft standard for the MPEG-7 query format.
The issue of user privacy is constantly brought to the spotlight since an ever increasing number of online services collects and processes personal information from users, in the context of personalized service provis...
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The issue of user privacy is constantly brought to the spotlight since an ever increasing number of online services collects and processes personal information from users, in the context of personalized service provision. Although technology makes the collection of data easy, their protection against abuse is left to data protection legislation. However, the privacy requirements, other than being general and abstract terms to be regarded as legislature issues, should be brought down in the technological reality and carefully accounted for in devising technical solutions. In order to limit the disclosure and avoid the misuse of personal data, this paper discusses an architectural proposal for a middleware system that will enforce protection of user privacy through technical means. This goal is facilitated by a combination of a policy framework, a sensible interpretation of regulations into policies and the introduction of a privacy broker, named the Discreet Box.
In this paper we propose a handover method for multiservice non-geo satellite systems. The proposed algorithm can be used for satellite handover as well as for cell handover when a fixed amount of resources is allocat...
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In this paper we propose a handover method for multiservice non-geo satellite systems. The proposed algorithm can be used for satellite handover as well as for cell handover when a fixed amount of resources is allocated to each cell. Specifically, we consider the case in which the satellite system provides services to users of differrent QoS requirements. The first type of users require the minimization and, if possible, the elimination of the probability of forcing a connection in progress to termination during a handover. On the other hand, the users of the second category do not have any specific handover requirements. The new method is evaluated through extensive simulations and is proved to meet the requirements of the first type of users while at the same time maximizes the system utilization for both types of users.
In most of the automatic face classification applications, images should be captured in natural environments, where partial occlusions or high local changes in the illumination are frequent. For this reason, face clas...
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ISBN:
(纸本)0769525210
In most of the automatic face classification applications, images should be captured in natural environments, where partial occlusions or high local changes in the illumination are frequent. For this reason, face classification tasks in uncontrolled environment are still nowadays unsolved problems, given that the loss of information caused by these artifacts can easily mislead any classifier. We present in this paper a system to extract robust face features that can be applied to encode information from any zone of the face and that can be used for different face classification problems. To test this method we include the results obtained in different gender classification experiments, considering controlled and uncontrolled environments and extracting face features from internal and external face zones. The obtained rates show, on the one hand, that we can obtain significant information applying the presented feature extraction scheme and, on the other hand, that the external face zone can contribute useful information for classification purposes.
The goal of this paper is to study the set of features that is suitable for describing animals in images, and for being able to categorize them in natural scenes. We propose multi-scale features based on Gaussian deri...
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This paper adds a number of novel concepts into global s/t cut methods improving their efficiency and making them relevant for a wider class of applications in vision where algorithms should ideally run in real-time. ...
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In this paper an architecture for low cost robotic applications as well as its implementation in a commercial robot is presented. HumanPT architecture differs than other architectures because it is implemented on exis...
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One of the areas that needs more improvement within the e-learning environments via Internet (in fact they suppose a very big effort to be accomplished) is allowing students to access and practice real experiments is ...
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One of the areas that needs more improvement within the e-learning environments via Internet (in fact they suppose a very big effort to be accomplished) is allowing students to access and practice real experiments is a real laboratory, instead of using simulations in Marin, R. et al. (2003). Real laboratories allow students to acquire methods, skills and experience related to real equipment, in a manner that is very close to the way they are being used in industry. The purpose of the project is the study, development and implementation of an e-learning environment to allow undergraduate students to practice subjects related to Robotics and Artificial Intelligence. The system, which is now at a preliminary stage, will allow the remote experimentation with real robotic devices (i.e. robots, cameras, etc.). It will enable the student to learn in a collaborative manner (remote participation with other students) where it will be possible to combine the on-site activities (performed "in-situ" within the real lab during the normal practical sessions), with the "online" one (performed remotely from home via the Internet). Moreover, the remote experiments within the e-laboratory to control the real robots can be performed by both, students and even scientist. This project is under development and it is carried out jointly by two Universities (UPC and UJI). In this article we present the system architecture and the way students and researchers have been able to perform a remote programming of multirobot systems via Web
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