scholarly journals Location-Aware Resource Discovery and QoR-Driven Resource Selection for Hybrid Web Environments

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6835
Author(s):  
Lara Kallab ◽  
Richard Chbeir ◽  
Michael Mrissa

In the Web of Things (WoT) context, an increasing number of stationary and mobile objects provide functions as RESTful services, also called resources, that can be combined with other existing Web resources, to create value-added processes. However, nowadays resource discovery and selection are challenging, due to (1) the growing number of resources providing similar functions, making Quality of Resource (QoR) essential to select appropriate resources, (2) the transient nature of resource availability due to sporadic connectivity, and (3) the location changes of mobile objects in time. In this paper, we first present a location-aware resource discovery that relies on a 3-dimensional indexing schema, which considers object location for resource identification. Then, we present a QoR-driven resource selection approach that uses a Selection Strategy Adaptor (SSA) to form i-compositions (with i ∈N*) offering different implementation alternatives. The defined SSA allows forming resource compositions while considering QoR constraints and Inputs/Outputs matching of related resources, as well as resource availability and users different needs (e.g., optimal and optimistic compositions obtained using a scoring system). Analyses are made to evaluate our service quality model against existing ones, and experiments are conducted in different environments setups to study the performance of our solution.

2015 ◽  
Vol 713-715 ◽  
pp. 2195-2198
Author(s):  
Jun Li Mao ◽  
Xiang Luo ◽  
Xiao Zhen Wang ◽  
Chao Hong Yang

Resource discovery is the key of network resource management, which includes multiple aspects, such as resource description, resource organization, and resource discovery and resource selection. For a long time, communication network resourcehas been lack of unified and standardized description, causing users difficult to precisely find related resources in demand. This paper presents a distributed resource query methods based on management domain, including distributed resource query architecture, the basic process of resource discovery, update method,query methods and so on. The method of network resources makes use of collaborative queries to realize network resource discovery according to need.


2011 ◽  
Vol 4 (2) ◽  
pp. 15 ◽  
Author(s):  
Roland J. Sparks

The cost of college is increasing faster than inflation with the government funding over 19 million student loans that have a current outstanding balance of over $850 billion in 2010. Student default rates for 2008 averaged 7% but for some colleges, default rates were as high as 46.8%. Congress is demanding answers from colleges and universities about the quality of their education and the return on the governments investment. Current practices measure universities effectiveness by self-developed and measured outcomes. This system does not seem to be effective in measuring the value-added by a college education. This paper develops a model to evaluate the value-added through higher education. The model uses financial return on investment as viewed by the government lenders. A service quality model is introduced to help identify factors that are significant and easy to measure in determining a universitys ability to return the governments investment.


2014 ◽  
Vol 668-669 ◽  
pp. 1615-1620
Author(s):  
Yu Yang ◽  
Hua Zhou ◽  
Jun Hui Liu ◽  
Yun Feng

With the gradual development of Cloud Computing, the model of work and business will fundamentally change in the future. Current market trading mechanism under the cloud computing environment is lacking in flexibility and most of companies adopt a fixed-rate pricing model, which is difficult to meet the different needs of users. Based on cloud bank model, this paper introduces economic theory to provide a theoretical basis for the development of resource prices and propose a dynamic pricing strategy and maximize utility resource selection strategy based on market supply and demand and credit for cloud bank. In the last part of this paper, we use simulation platform to do a simple experiment to test this dynamic pricing strategy. Experiment result shows the pricing strategy could adjust computing resource prices automatically under the general market price rule conditions and maximize utility resource selection strategy could get the max utility for resource consumers.


Author(s):  
M. Ruta

New mobile architectures allow for stable networked links from almost everywhere, and more and more people make use of information resources for work and business purposes on mobile systems. Although technological improvements in the standardization processes proceed rapidly, many challenges, mostly aimed at the deployment of value-added services on mobile platforms, are still unsolved. In particular the evolution of wireless-enabled handheld devices and their capillary diffusion have increased the need for more sophisticated service discovery protocols (SDPs).Here we present an approach, which improves Blue-tooth SDP, to provide m-commerce resources to the users within a piconet, extending the basic service discovery with semantic capabilities. In particular we exploit and enhance the SDP in order to identify generic resources rather than only services. We have integrated a “semantic layer” within the application level of the standard Bluetooth stack in order to enable a simple interchange of semantically annotated information between a mobile client performing a query and a server exposing available resources. We adopt a simple piconet configuration where a stable networked zone server, equipped with a Bluetooth interface, collects requests from mobile clients and hosts a semantic facilitator to match requests with available resources. Both requests and resources are expressed as semantically annotated descriptions, so that a semantic distance can be computed as part of the ranking function, to choose the most promising resources for a given request.


2009 ◽  
pp. 2957-2968
Author(s):  
Michele Ruta ◽  
Tommaso Di Noia ◽  
Eugenio Di Sciascio ◽  
Francesco Maria Donini ◽  
Giacomo Piscitelli

New mobile architectures allow for stable networked links from almost everywhere; and more and more people make use of information resources for work and business purposes on mobile systems. Although technological improvements in the standardization processes proceed rapidly; many challenges; mostly aimed at the deployment of value-added services on mobile platforms; are still unsolved. In particular the evolution of wireless-enabled handheld devices and their capillary diffusion have increased the need for more sophisticated service discovery protocols (SDPs). Here we present an approach; which improves Bluetooth SDP; to provide m-commerce resources to the users within a piconet; extending the basic service discovery with semantic capabilities. In particular we exploit and enhance the SDP in order to identify generic resources rather than only services. We have integrated a “semantic layer” within the application level of the standard Bluetooth stack in order to enable a simple interchange of semantically annotated information between a mobile client performing a query and a server exposing available resources. We adopt a simple piconet configuration where a stable networked zone server; equipped with a Bluetooth interface; collects requests from mobile clients and hosts a semantic facilitator to match requests with available resources. Both requests and resources are expressed as semantically annotated descriptions; so that a semantic distance can be computed as part of the ranking function; to choose the most promising resources for a given request.


Author(s):  
Jasmine Cameron ◽  
Margaret E. Phillips

Fundamental to the idea of national libraries is the notion that they should take responsibility for collecting, recording, providing access to and preserving their own national imprint. The extension of publishing beyond the realm of print into a variety of media forms, including online publications, adds complexity to, but does not change the fundamental role and responsibilities of national libraries. This chapter explores the issues that must be resolved in order to ensure that today’s Internet publications will still be available to researchers in the centuries to come. The transient nature of Internet publications, the huge volume of them and the difficulty of identifying what exists are challenges for national libraries. Collection building, description of resources, efficient resource discovery, technical infrastructure, permanent naming and preservation are areas that need focussed attention and development. A number of national libraries have active programs to find solutions and the progress being made is described.


2019 ◽  
Vol 89 (2) ◽  
pp. e01348 ◽  
Author(s):  
Miriam Tsalyuk ◽  
Werner Kilian ◽  
Björn Reineking ◽  
Wayne Marcus Getz

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