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How to centralizing manage desktop resource and protect critical information from leaking, more and more enterprise choose implementing cloud desktop services. But when working environment gradually move form PC to cloud desktop s...
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How to centralizing manage desktop resource and protect critical information from leaking, more and more enterprise choose implementing cloud desktop services. But when working environment gradually move form PC to cloud desktop services, if the cloud desktop doesn't operate smoothly, it will result in the enterprise not working properly. So how to ensure the service quality of cloud desktop will become the most challenging thing for the enterprise. And our research team has proposed one prototype for verifying the service quality of cloud desktop services. This paper will focus on the technologies related to this service quality verification platform. In Chapter II, we give the introduction of cloud desktop services. In Chapter III, we talk about the testing skills related to cloud desktop services. And the conclusion is given in Chapter IV.
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摘要 :Traditionally, the infrastructure required for broadcast media creation has consisted of specialized graphics workstations, high-performance storage arrays, complex networking, and video wiring, all of which are capital-intensive ...
展开Traditionally, the infrastructure required for broadcast media creation has consisted of specialized graphics workstations, high-performance storage arrays, complex networking, and video wiring, all of which are capital-intensive and expensive to maintain. Over the past two years, NBCUniversal has developed a cloud infrastructure model to provide on-air media creation as a service to its creative teams. Utilizing GPU-enabled cloud-based virtual machines, dynamically scalable high-performance cloud-native storage, and infrastructure-as-code methodologies, we are now able to provide full end-to-end media production workflows in the public cloud. With an automation-forward approach, we know exactly what is going to be applied, how it will propagate through the infrastructure, and what dependencies are involved. Elastic scalability of compute and storage eliminates over-provisioning (and its related capital investments) and provides the ability to dynamically add/remove resources as necessary. This paper aims to highlight the technical details of our programmatically reproducible solution as well as the challenges and benefits of media creation in the cloud
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The enterprise has been working so hard to put enterprise information management into centralization, and it's the only way for protecting critical enterprise information from leaking. As kinds of cloud computing technologies gett...
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The enterprise has been working so hard to put enterprise information management into centralization, and it's the only way for protecting critical enterprise information from leaking. As kinds of cloud computing technologies getting ready, centralization of enterprise information management is no longer a dream. And thin client will become one of the most important endpoint devices for using all kind of cloud services. The operational model for thin client is the typical client-server architecture. Thin clients have been well controlled by the enterprise, so the employees can use them to access each cloud services safely (ex. Desktop Cloud, Application Cloud etc.). This paper will focus on the technologies using by thin client. In Chapter II, we give the introduction of thin client. In Chapter III, we talk about the cloud technologies related to thin client. And the conclusion is given in Chapter IV.
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Virtual desktop infrastructures (VDIs) are a system on a server platform that hosts multiple virtual machines (VMs). Traditionally, VDIs are on-premise and thus are completely supported and maintained internally by an organization...
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Virtual desktop infrastructures (VDIs) are a system on a server platform that hosts multiple virtual machines (VMs). Traditionally, VDIs are on-premise and thus are completely supported and maintained internally by an organization; hence, they can be costly and inefficient to maintain and support. In this paper, TrimCloud is proposed as a Software-as-a-Service (SaaS) solution to on-premise VDIs by reducing the costs, labor, and the worries of installing, implementing, and maintaining a VDI. TrimCloud, which uses the VirtualBox program as its hypervisor, delivers isolatedvirtual environments through the cloud using Open VPN for added security. The TrimCloud Web App offers a point of access where the client manages the administrative duties including selecting the specifications for their virtual machines. The prototype implementation of TrimCloud is currently available at the TrimCloud website. This paper examines the capabilities, advantages, and limitations of using the SaaS solution TrimCloud.
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This paper examines computer virtualization as a solution to issues encountered in maintaining HMI and SCADA systems based on commercial off-the-shelf computing hardware. Following a brief primer, this paper outlines issues arisin...
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This paper examines computer virtualization as a solution to issues encountered in maintaining HMI and SCADA systems based on commercial off-the-shelf computing hardware. Following a brief primer, this paper outlines issues arising from the rapid advancement of personal and server computing hardware, including automation software conflicts with new operating systems, device driver availability for old operating systems, and migrating backup images to new hardware. Opportunities for improvement are identified in backup and recovery, operator access to computing resources, and prototyping HMI and program changes. The concept of a virtual machine is introduced, and common architectures are examined, followed by the description of an example virtualized control room. Finally, this paper examines the experiences of a multisite cement producer in implementing virtualization in two of their plants. This examination explores the reasoning, advantages, disadvantages, and limitations encountered in moving existing systems to a virtualized platform.
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This study evaluated the comparative effect of interactive multimedia to text-based content on learners taking a software application course. One hundred eleven participants took part in the study. The researcher employed the use ...
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This study evaluated the comparative effect of interactive multimedia to text-based content on learners taking a software application course. One hundred eleven participants took part in the study. The researcher employed the use of web analytics and online surveys to capture data. The study showed that there was a significant difference in the learner preference for either type of content. An exploratory study on the learner preference of specific interactive multimedia features showed that learners preferred the video presentation and the VDI rather than the other features. The study also evaluated the comparative effect of the two content types on learner comprehension. For instance, where learners made use of interactive multimedia, they performed significantly better than instances where learners made use of text-based content. These results suggest that use of interactive multimedia can lead to better comprehension and participation than text-based content in self-paced software application courses.
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The application of artificial case studies is a well established technique in urban drainage to test
measures, approaches or models. However, the preparation of a virtual case study for a sewer
system is a tedious task. Several al...
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The application of artificial case studies is a well established technique in urban drainage to test
measures, approaches or models. However, the preparation of a virtual case study for a sewer
system is a tedious task. Several algorithms have been presented in the literature for an
automatic generation of virtual sewer systems. Applying the approach of generating virtual
cities by means of the software VIBe (Virtual Infrastructure Benchmarking) the urban structure
(including elevation map, land use and population distribution) is generated firstly and the
infrastructure is designed meeting the requirements of the urban structure. The aim of this paper
is the development of an agent based approach for generating virtual sewer systems. This new
algorithm functions as module of the software VIBe but can of course also be applied to a real
city in order to get information on possible/optimal sewer placement. Here hundred virtual VIBe
cities and for each twelve virtual sewer networks are generated and calibrated based on data of
an alpine region. It is revealed that with the approach presented virtual sewer networks which
are comparable with real world sewer networks can be generated. The agent based method
provides data sets for benchmarking and allows case independent testing of new measures.
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Research Infrastructures (RIs) are facilities, resources and services used by scientists to perform research and support innovation. A number of EU research infrastructures [e.g. e-Science and Technology European Infrastructure fo...
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Research Infrastructures (RIs) are facilities, resources and services used by scientists to perform research and support innovation. A number of EU research infrastructures [e.g. e-Science and Technology European Infrastructure for Biodiversity and Ecosystem Research (LifeWatch) European Research Iinfrastructures Consortium (ERIC); The European life-sciences Infrastructure for biological Information (ELIXIR);?the European Marine Biological Resource Centre (EMBRC ERIC); the European Research Infrastructure for Imaging Technologies in Biological and Biomedical Sciences (uroBioImaging ERIC)] have been building Virtual Research Environments (VREs), which include many virtual laboratories (vLabs) offering, one stop data access to scientists, high computational capacity and collaborative research platforms in support of the requirements of the digital science. This presentation gives examples on the use of the vLabs developed by LifeWatch ERIC which have subsequently been? taken up as web services by other RIs. The RvLab operates on a high-performance computer cluster, and?has been used in order to analyse various properties of taxon equality, with a focus on marine species. This taxonomic information on marine biota is organized and made publicly available through the World Register of Marine Species (WoRMS) that delivers more than 250,000 described valid species names. Although scientists consider an equal status (in terms of contribution to overall diversity) to each taxon used in taxonomy, biogeography, ecology and biodiversity, the question “are all taxa equal?” has never been tested at a global scale. We present evidence that this question can be addressed by applying relatedness indices (Taxonomic Distinctness) over the entire WoRMS metazoan tree. The virtual micro-CT laboratory (Micro-CT vLab), which can be used by the members of the scientific community interested in the digitisation methods and biological collections, makes the micro-CT data exploration of natural history specimens freely available over the internet. Micro-CT vLab makes it possible the online exploration and dissemination of micro-CT datasets, which are only rarely made available to the public due to their very?large size and a lack of dedicated online platforms supporting the interactive manipulation of 3D data. Examples of how these vLabs can be used by other RIs are provided.
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This paper evaluates the sequential performance of virtual execution environments (VEE) belonging to the CLI (Common Language Infrastructure) and JVM (Java Virtual Machine) standards, for the usual approaches of representing multi...
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This paper evaluates the sequential performance of virtual execution environments (VEE) belonging to the CLI (Common Language Infrastructure) and JVM (Java Virtual Machine) standards, for the usual approaches of representing multidimensional arrays in programs that present intensive array access. Such programs are mostly found in scientific and engineering application domains. It shows that the performance profile of virtual execution is still highly influenced by the choice of both the multidimensional array representation and the VEE implementation, also contradicting some results of previous related works, as well as some beliefs of HPC programmers that come from their practice with native execution languages, such as C, C++, and Fortran. Finally, recommendations are provided both for HPC programmers that desire to take advantage of VEE performance for their array-intensive code and for VEE developers that are interested in improving the performance of virtual execution for the needs of HPC applications.
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New and emerging Internet applications are increasingly becoming high-performance and network-based, relying on optical network and cloud computing services. Due to the accelerated evolution of these applications, the flexibility ...
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New and emerging Internet applications are increasingly becoming high-performance and network-based, relying on optical network and cloud computing services. Due to the accelerated evolution of these applications, the flexibility and efficiency of the underlying optical network infrastructure as well as the cloud computing infrastructure [i.e., data centers (DCs)] become more and more crucial. In order to achieve the required flexibility and efficiency, coordinated provisioning of DCs and optical network interconnecting DCs is essential. In this paper, we address the role of high-performance dynamic optical networks in cloud computing environments. A DC as a service architecture for future cloud computing is proposed. Central to the proposed architecture is the coordinated virtualization of optical network and IT resources of distributed DCs, enabling the composition of virtual infrastructures (VIs). During the composition process of the multiple coexisting but isolated VIs, the unique characteristics of optical networks (e.g., optical layer constraints and impairments) are addressed and taken into account. The proposed VI composition algorithms are evaluated over various network topologies and scenarios. The results provide a set of guidelines for the optical network and DC infrastructure providers to be able to effectively and optimally provision VI services to users and satisfy their requirements.
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