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Rapid advances are changing the technology and applications of multidetector computed tomography (CT) scanners. The major increase in data associated with this new technology, however, breaks most commercial picture archiving and ...
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Rapid advances are changing the technology and applications of multidetector computed tomography (CT) scanners. The major increase in data associated with this new technology, however, breaks most commercial picture archiving and communication system (PACS) architectures by preventing them from delivering data in real time to radiologists and outside clinicians. We proposed a phased model for 3D workflow, installed a thin-slice archive and measured thin-slice data storage over a period of 5 months. A mean of 1,869 CT studies were stored per month, with an average of 643 images per study and a mean total volume of 588 GB/month. We also surveyed 48 radiologists to determine diagnostic use, impressions of thin-slice value, and requirements for retention times. The majority of radiologists thought thin slice was helpful for diagnosis and regularly used the application. Permanent storage of thin slice CT is likely to become best practice and a mission-critical pursuit for the health care enterprise.
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An isomorphic web application shares code between the server and the client by cleverly combining suitable parts of server-rendered applications and single-page applications. In this article, we study the benefits and challenges o...
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An isomorphic web application shares code between the server and the client by cleverly combining suitable parts of server-rendered applications and single-page applications. In this article, we study the benefits and challenges of isomorphism in single-page applications in terms of a gray literature review and a case study. The case study was conducted as a developer interview, where developers familiar with isomorphic web applications were interviewed. The results of both studies are then compared and the key findings are compared together. The results show that isomorphism in single-page applications brings benefits to both the developers and the end-users. Isomorphism in single-page applications is challenging to implement and has some downsides, but they mostly affect developers. Implementing isomorphism enables sharing code between the server and the client, but it increases the complexity of the application.Framework and library compatibility are issues that must be addressed by the developers.
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We describe a new progressive technique that allows real-time rendering of extremely large tetrahedral meshes. Our approach uses a client-server architecture to incrementally stream portions of the mesh from a server to a client w...
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We describe a new progressive technique that allows real-time rendering of extremely large tetrahedral meshes. Our approach uses a client-server architecture to incrementally stream portions of the mesh from a server to a client which refines the quality of the approximate rendering until it converges to a full quality rendering. The results of previous steps are re-used in each subsequent refinement, thus leading to an efficient rendering. Our novel approach keeps very little geometry on the client and works by refining a set of rendered images at each step. Our interactive representation of the dataset is efficient, light-weight, and high quality. We present a framework for the exploration of large datasets stored on a remote server with a thin client that is capable of rendering and managing full quality volume visualizations
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摘要 :
We describe a new progressive technique that allows real-time rendering of extremely large tetrahedral meshes. Our approach uses a client-server architecture to incrementally stream portions of the mesh from a server to a client w...
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We describe a new progressive technique that allows real-time rendering of extremely large tetrahedral meshes. Our approach uses a client-server architecture to incrementally stream portions of the mesh from a server to a client which refines the quality of the approximate rendering until it converges to a full quality rendering. The results of previous steps are re-used in each subsequent refinement, thus leading to an efficient rendering. Our novel approach keeps very little geometry on the client and works by refining a set of rendered images at each step. Our interactive representation of the dataset is efficient, light-weight, and high quality. We present a framework for the exploration of large datasets stored on a remote server with a thin client that is capable of rendering and managing full quality volume visualizations
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Current developments in storage solutions, PACS, and client-server systems allow for 3D imaging at the desktop. This can be achieved together with full storage into PACS of all slices, including the very large thin-section CT data...
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Current developments in storage solutions, PACS, and client-server systems allow for 3D imaging at the desktop. This can be achieved together with full storage into PACS of all slices, including the very large thin-section CT datasets. This paper describes a possible setup, which has been in operation for several years now, in response to an article by Meenan et al. previously published in this journal (1).
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The growing proliferation and fragmentation of devices presents an ongoing challenge for companies as they evaluate their digital supply chain to reduce inefficiencies, standardise processes and improve the ability to cost-effecti...
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The growing proliferation and fragmentation of devices presents an ongoing challenge for companies as they evaluate their digital supply chain to reduce inefficiencies, standardise processes and improve the ability to cost-effectively support evolving digital business models. This paper looks at how cloud services can improve the efficiencies and scalability of the discrete workflow steps and how moving to a single, logical representation of each video programme can redefine the entire digital supply chain.
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Server-side polymorphism is used by malware distributors in order to evade detection by anti-virus (AV) scanners. It is difficult for traditional AVs to detect this type of malware because the transformation code is not visible fo...
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Server-side polymorphism is used by malware distributors in order to evade detection by anti-virus (AV) scanners. It is difficult for traditional AVs to detect this type of malware because the transformation code is not visible for security analysis. Using a tera-scale dataset consisting of antivirus telemetry reports pertaining to more than half a billion files, we conduct what is, to the best of our knowledge, the most wide-scale analysis of the properties of web-borne polymorphic malware done to date.
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With the rapid growth of mobile applications or web services, many users are using the same service at the same time which leads to the need for scalable application services. To enlarge the capability of handling large volumes of...
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With the rapid growth of mobile applications or web services, many users are using the same service at the same time which leads to the need for scalable application services. To enlarge the capability of handling large volumes of concurrent requests, server-side push technologies have been then introduced recently. Server-side push technology tries to eliminate unnecessary client requests by sending notification messages to clients when a data change event is triggered on the server side. There are two famous server-side push frameworks used today, and they are services using the Pub/Sub protocol, and the Ajax Push Model. These two mechanisms need middleware between clients and servers which result in complex and heavy-weight system architectures for application developers. To simplify development and increase ability to accommodate the growth in application users, a RESTful notification service is proposed in this paper. The notification service leverages the event-driven characteristic of JavaScript, and pushes response data asynchronously to different requests. Based on the RESTful software architecture style, the proposed notification service is not only a lightweight system but also has impressive performance.
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With the popularity of mobile phones and the ubiquity of wireless transmission technologies, spatial crowdsourcing (SC) has emerged as a novel approach to outsource location-based tasks to a set of workers who physically move to t...
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With the popularity of mobile phones and the ubiquity of wireless transmission technologies, spatial crowdsourcing (SC) has emerged as a novel approach to outsource location-based tasks to a set of workers who physically move to the designated locations to perform the tasks. To achieve the accurate task matching, both requesters and workers need to expose their locations or queries to the SC-Server, which raises security concerns. Although many protection measures have been proposed, there are some drawbacks in one-side protection, dual-server setting and user scalability when they are applied to the practical crowdsourcing environment. In this paper, we design a general framework for spatial task matching in a single-server setting to simultaneously protect the privacy for both tasks and workers. Combining multi-user searchable encryption with segment tree, we propose two different schemes to achieve the spatial task matching over the encrypted data. Efficient user enrollment and revocation are also supported. Extensive experiments validate the feasibility of our schemes.
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Independent interpolation of local surface patches and local normal patches is an efficient way for fast rendering of smooth curved surfaces from rough polyhedral meshes. However, the independently interpolating normals may deviat...
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Independent interpolation of local surface patches and local normal patches is an efficient way for fast rendering of smooth curved surfaces from rough polyhedral meshes. However, the independently interpolating normals may deviate greatly from the analytical normals of local interpolating surfaces, and the normal deviation may cause severe rendering defects when the surface is shaded using the interpolating normals. In this paper we propose two novel normal interpolation schemes along with interpolation of cubic Bezier triangles for rendering curved surfaces from rough triangular meshes. Firstly, the interpolating normal is computed by a Gregory normal patch to each Bezier triangle by a new definition of quadratic normal functions along cubic space curves. Secondly, the interpolating normal is obtained by blending side-vertex normal functions along side-vertex parametric curves of the interpolating Bezier surface. The normal patches by these two methods can not only interpolate given normals at vertices or boundaries of a triangle but also match the shape of the local interpolating surface very well. As a result, more realistic shading results are obtained by either of the two new normal interpolation schemes than by the traditional quadratic normal interpolation method for rendering rough triangular meshes.
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