WorldWideScience
 
 
1

Ontology alignment architecture for semantic sensor web integration.  

UK PubMed Central (United Kingdom)

Sensor networks are a concept that has become very popular in data acquisition and processing for multiple applications in different fields such as industrial, medicine, home automation, environmental detection, etc. Today, with the proliferation of small communication devices with sensors that collect environmental data, semantic Web technologies are becoming closely related with sensor networks. The linking of elements from Semantic Web technologies with sensor networks has been called Semantic Sensor Web and has among its main features the use of ontologies. One of the key challenges of using ontologies in sensor networks is to provide mechanisms to integrate and exchange knowledge from heterogeneous sources (that is, dealing with semantic heterogeneity). Ontology alignment is the process of bringing ontologies into mutual agreement by the automatic discovery of mappings between related concepts. This paper presents a system for ontology alignment in the Semantic Sensor Web which uses fuzzy logic techniques to combine similarity measures between entities of different ontologies. The proposed approach focuses on two key elements: the terminological similarity, which takes into account the linguistic and semantic information of the context of the entity's names, and the structural similarity, based on both the internal and relational structure of the concepts. This work has been validated using sensor network ontologies and the Ontology Alignment Evaluation Initiative (OAEI) tests. The results show that the proposed techniques outperform previous approaches in terms of precision and recall.

Fernandez S; Marsa-Maestre I; Velasco JR; Alarcos B

2013-01-01

2

Ontology Alignment Architecture for Semantic Sensor Web Integration  

Directory of Open Access Journals (Sweden)

Full Text Available Sensor networks are a concept that has become very popular in data acquisition and processing for multiple applications in different fields such as industrial, medicine, home automation, environmental detection, etc. Today, with the proliferation of small communication devices with sensors that collect environmental data, semantic Web technologies are becoming closely related with sensor networks. The linking of elements from Semantic Web technologies with sensor networks has been called Semantic Sensor Web and has among its main features the use of ontologies. One of the key challenges of using ontologies in sensor networks is to provide mechanisms to integrate and exchange knowledge from heterogeneous sources (that is, dealing with semantic heterogeneity). Ontology alignment is the process of bringing ontologies into mutual agreement by the automatic discovery of mappings between related concepts. This paper presents a system for ontology alignment in the Semantic Sensor Web which uses fuzzy logic techniques to combine similarity measures between entities of different ontologies. The proposed approach focuses on two key elements: the terminological similarity, which takes into account the linguistic and semantic information of the context of the entity’s names, and the structural similarity, based on both the internal and relational structure of the concepts. This work has been validated using sensor network ontologies and the Ontology Alignment Evaluation Initiative (OAEI) tests. The results show that the proposed techniques outperform previous approaches in terms of precision and recall.

Susel Fernandez; Ivan Marsa-Maestre; Juan R. Velasco; Bernardo Alarcos

2013-01-01

3

Ontology alignment architecture for semantic sensor web integration.  

Science.gov (United States)

Sensor networks are a concept that has become very popular in data acquisition and processing for multiple applications in different fields such as industrial, medicine, home automation, environmental detection, etc. Today, with the proliferation of small communication devices with sensors that collect environmental data, semantic Web technologies are becoming closely related with sensor networks. The linking of elements from Semantic Web technologies with sensor networks has been called Semantic Sensor Web and has among its main features the use of ontologies. One of the key challenges of using ontologies in sensor networks is to provide mechanisms to integrate and exchange knowledge from heterogeneous sources (that is, dealing with semantic heterogeneity). Ontology alignment is the process of bringing ontologies into mutual agreement by the automatic discovery of mappings between related concepts. This paper presents a system for ontology alignment in the Semantic Sensor Web which uses fuzzy logic techniques to combine similarity measures between entities of different ontologies. The proposed approach focuses on two key elements: the terminological similarity, which takes into account the linguistic and semantic information of the context of the entity's names, and the structural similarity, based on both the internal and relational structure of the concepts. This work has been validated using sensor network ontologies and the Ontology Alignment Evaluation Initiative (OAEI) tests. The results show that the proposed techniques outperform previous approaches in terms of precision and recall. PMID:24051523

Fernandez, Susel; Marsa-Maestre, Ivan; Velasco, Juan R; Alarcos, Bernardo

2013-09-18

4

Sensor system for web inspection  

Energy Technology Data Exchange (ETDEWEB)

A system for electrically measuring variations over a flexible web has a capacitive sensor including spaced electrically conductive, transmit and receive electrodes mounted on a flexible substrate. The sensor is held against a flexible web with sufficient force to deflect the path of the web, which moves relative to the sensor.

Sleefe, Gerard E. (1 Snowcap Ct., Cedar Crest, NM 87008); Rudnick, Thomas J. (626 E. Jackson Rd., St. Louis, MO 63119); Novak, James L. (11048 Malaguena La. NE., Albuquerque, NM 87111)

2002-01-01

5

Sensor Web Interaction  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Ubiquitous sensing fuses the concepts of intelligent systems with ubiquitous computing in the development of novel sensor web applications, whereby the interaction of multiple disparate autonomous artefacts is a key requirement. In this paper, we present SIXTH, which is a middleware infrastructure f...

O'Hare, G. M. P. (Greg M. P.); Muldoon, Conor; O'Grady, Michael J.; Collier, Rem; Murdoch, Olga; Carr, Dominic

6

GeoCENS: A Geospatial Cyberinfrastructure for the World-Wide Sensor Web.  

UK PubMed Central (United Kingdom)

The world-wide sensor web has become a very useful technique for monitoring the physical world at spatial and temporal scales that were previously impossible. Yet we believe that the full potential of sensor web has thus far not been revealed. In order to harvest the world-wide sensor web's full potential, a geospatial cyberinfrastructure is needed to store, process, and deliver large amount of sensor data collected worldwide. In this paper, we first define the issue of the sensor web long tail followed by our view of the world-wide sensor web architecture. Then, we introduce the Geospatial Cyberinfrastructure for Environmental Sensing (GeoCENS) architecture and explain each of its components. Finally, with demonstration of three real-world powered-by-GeoCENS sensor web applications, we believe that the GeoCENS architecture can successfully address the sensor web long tail issue and consequently realize the world-wide sensor web vision.

Liang SH; Huang CY

2013-01-01

7

Sensing the sensor web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The maturity of pervasive computing and Wireless Sensor Networks (WSNs) enables the development of smart environments in many scenarios, including surveillance and environmental monitoring. Extensive research efforts are being undertaken in sensor perception, data capture, management and interpretat...

Wan, Jie; O'Grady, Michael J.; O'Hare, G. M. P. (Greg M. P.)

8

Advancing Sensor Web Interoperability  

Energy Technology Data Exchange (ETDEWEB)

SensorNet is a framework being developed at Oak Ridge National Laboratory to tie together sensor data from all over the country to create a real-time detection and alert system for various threats, whether they are chemical, radiological, biological, nuclear, or explosive.

Shankar, Mallikarjun [ORNL; Gorman, Bryan L [ORNL; Smith, Cyrus M [ORNL

2005-01-01

9

Discovery Mechanisms for the Sensor Web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper addresses the discovery of sensors within the OGC Sensor Web Enablement framework. Whereas services like the OGC Web Map Service or Web Coverage Service are already well supported through catalogue services, the field of sensor networks and the according discovery mechanisms is still a ch...

Jirka, Simon; Bröring, Arne; Stasch, Christoph

10

A Semantic Sensor Web for Environmental Decision Support Applications  

Directory of Open Access Journals (Sweden)

Full Text Available Sensing devices are increasingly being deployed to monitor the physical world around us. One class of application for which sensor data is pertinent is environmental decision support systems, e.g., flood emergency response. For these applications, the sensor readings need to be put in context by integrating them with other sources of data about the surrounding environment. Traditional systems for predicting and detecting floods rely on methods that need significant human resources. In this paper we describe a semantic sensor web architecture for integrating multiple heterogeneous datasets, including live and historic sensor data, databases, and map layers. The architecture provides mechanisms for discovering datasets, defining integrated views over them, continuously receiving data in real-time, and visualising on screen and interacting with the data. Our approach makes extensive use of web service standards for querying and accessing data, and semantic technologies to discover and integrate datasets. We demonstrate the use of our semantic sensor web architecture in the context of a flood response planning web application that uses data from sensor networks monitoring the sea-state around the coast of England.

Alasdair J. G. Gray; Jason Sadler; Oles Kit; Kostis Kyzirakos; Manos Karpathiotakis; Jean-Paul Calbimonte; Kevin Page; Raúl García-Castro; Alex Frazer; Ixent Galpin; Alvaro A. A. Fernandes; Norman W. Paton; Oscar Corcho; Manolis Koubarakis; David De Roure; Kirk Martinez; Asunción Gómez-Pérez

2011-01-01

11

Sensor Network Architectures for Monitoring Underwater Pipelines  

Directory of Open Access Journals (Sweden)

Full Text Available This paper develops and compares different sensor network architecture designs that can be used for monitoring underwater pipeline infrastructures. These architectures are underwater wired sensor networks, underwater acoustic wireless sensor networks, RF (Radio Frequency) wireless sensor networks, integrated wired/acoustic wireless sensor networks, and integrated wired/RF wireless sensor networks. The paper also discusses the reliability challenges and enhancement approaches for these network architectures. The reliability evaluation, characteristics, advantages, and disadvantages among these architectures are discussed and compared. Three reliability factors are used for the discussion and comparison: the network connectivity, the continuity of power supply for the network, and the physical network security. In addition, the paper also develops and evaluates a hierarchical sensor network framework for underwater pipeline monitoring.

Nader Mohamed; Imad Jawhar; Jameela Al-Jaroodi; Liren Zhang

2011-01-01

12

Sensor Network Architectures for Monitoring Underwater Pipelines  

Science.gov (United States)

This paper develops and compares different sensor network architecture designs that can be used for monitoring underwater pipeline infrastructures. These architectures are underwater wired sensor networks, underwater acoustic wireless sensor networks, RF (Radio Frequency) wireless sensor networks, integrated wired/acoustic wireless sensor networks, and integrated wired/RF wireless sensor networks. The paper also discusses the reliability challenges and enhancement approaches for these network architectures. The reliability evaluation, characteristics, advantages, and disadvantages among these architectures are discussed and compared. Three reliability factors are used for the discussion and comparison: the network connectivity, the continuity of power supply for the network, and the physical network security. In addition, the paper also develops and evaluates a hierarchical sensor network framework for underwater pipeline monitoring.

Mohamed, Nader; Jawhar, Imad; Al-Jaroodi, Jameela; Zhang, Liren

2011-01-01

13

Discovery Mechanisms for the Sensor Web  

Directory of Open Access Journals (Sweden)

Full Text Available This paper addresses the discovery of sensors within the OGC Sensor Web Enablement framework. Whereas services like the OGC Web Map Service or Web Coverage Service are already well supported through catalogue services, the field of sensor networks and the according discovery mechanisms is still a challenge. The focus within this article will be on the use of existing OGC Sensor Web components for realizing a discovery solution. After discussing the requirements for a Sensor Web discovery mechanism, an approach will be presented that was developed within the EU funded project “OSIRIS”. This solution offers mechanisms to search for sensors, exploit basic semantic relationships, harvest sensor metadata and integrate sensor discovery into already existing catalogues.

Simon Jirka; Arne Bröring; Christoph Stasch

2009-01-01

14

A Survey of Wireless Sensor Network Architectures  

Directory of Open Access Journals (Sweden)

Full Text Available A wireless sensor network (WSN) consists of spatially distributed autonomous sensors that cooperativelymonitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion,or pollutants, at different locations. Recent advances in low-power highly-integrated electronics,advances in micro-electro-mechanical systems (MEMS), rapid growth in the type and quality of availablesensors, and progress in communication have allowed WSNs to achieve an unprecedented growth incommercial, industrial and military applications. In order to better understand WSNs, we look at theirnetwork architectures. In this survey, we classify existing WSN architectures into specific groups basedon WSN behaviour and data flow characteristics. Existing architectures are described and presentedalong with their advantages and disadvantages. The existing architectures are also evaluated in terms ofmost common WSN performance parameters such as network lifetime, latency, reliability, quality ofservice (QoS), fidelity, scalability, modularity, and ease of deployment.

Almir Davis; Hwa Chang

2013-01-01

15

Semantic Architecture for Web application Security  

Directory of Open Access Journals (Sweden)

Full Text Available Growth of web applications has facilitated the humanity almost in all aspects of life especially e-health, e-business and e-communication but this application are exposed for web attacks, unauthorized access, evil intentions and treacherous engagements. Various strategies have been formulated over a period of time in the form of intrusion detection system, encryption devices, and firewalls but still proved to be ineffective. In this paper, we have proposed a system having semantic architecture that is capable of performing detection semantically in the context of HTTP protocol, the data, and the target application. The knowledgebase of the system is the ontological representation of communication protocol, attacks data and the application profile that can be refined and expanded over time. Unlike traditional signature base approach, the semantic architecture analysis the HTTP request with the help of semantic rules and inferred knowledge after reasoning of knowledgebase through Inference engine. Non signature based approach of the system enhance the capability of the system to detect the unknown attacks with low false positive rate. The system is evaluated by comparing with existing open source solutions and showing significant improvement in term of detection ability with low alarm rate

Abdul Razzaq; Ali Hur; H Farooq Ahmad; Muddassar Masood

2012-01-01

16

Integrated Web Architecture Based on Web3D, Flex and SSH  

Directory of Open Access Journals (Sweden)

Full Text Available Focusing on the problems occurred in traditional 2D image-word-based web applications, the author put forward con-cept of integrating Web3D, Flex and SSH technologies to create advanced “3D Virtual Reality & RIA” web application architecture, researched mechanisms of their architectures, and implemented their integration and communication & interaction: Flex and Struts2 via XML, Flex and Spring & Hibernate via BlazeDS, Flex and Web3D via JavaScript. The practice has shown that the integrated web architecture based on Web3D, Flex and SSH is effective and valuable.

Wenjun ZHANG

2010-01-01

17

A Novel Architecture of Mercator: A Scalable, Extensible Web Crawler with Focused Web Crawler?  

Directory of Open Access Journals (Sweden)

Full Text Available This Paper described A Novel Architecture of Mercator: A Scalable, Extensible Web Crawler withFocused Web Crawler. We enumerate the major components of any Scalable and Focused Web Crawler anddescribe the particular components used in this Novel Architecture. We also describe this Novel Architecturesupport for Extensibility and downloaded user’s support information. We also describe how the Focused WebCrawler component integrates with Mercator: A Scalable, Extensible Web Crawler and also describe theirfunctionality of every component and how to work together. We also describe how this Novel Architecturedownloaded maximum pages from web in minimum time and sure partially extract web pages which isneeded to users.

Sarnam Singh; Nidhi Tyagi?

2013-01-01

18

Towards a component composition and interaction architecture for the web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The Web is currently undergoing a change from a document- to a services-centered environment. This shift can be seen as a first step towards a component-centered environment. We shall explore requirements for a Web component architecture based on the Web services framework, which has been promoted r...

Pahl, Claus; Ward, David

19

Semantic Web on Scope: A New Architectural Model for the Semantic Web  

Directory of Open Access Journals (Sweden)

Full Text Available Problem Statement: Current web contains billions of documents and has many administrative problems and limitations; in addition to that the web content is still accessible only to humans. The solution to these problems is the Semantic Web. The Semantic Web is considered to be the extension for the current web. But there are problems facing the Semantic Web now, such as there is no clear architecture for it, there are four versions created by Tim Berners-Lee, but still up to now there is no agreement for one of these visions nor is there a clear picture for the relation between different layers inside this architecture and the associated technologies. The objectives of this study were to: (i) Identify the weaknesses that existed in the previous architectures and (ii) Reach a new architecture that corrects these weaknesses. Approach: This research uses the Qualitative Analysis Approach of Taylor and Renner, presents the four versions of the Semantic Web architecture, describing the function(s) and status of each layer and associated technologies, evaluates them using Gerber evaluation method and determines other design principles needed to modify and adapt this architecture as a step toward an agreement for one Semantic Web architecture. Results: The design of a new model for the Semantic Web architecture depends on the idea of previous versions. Conclusion: As a step toward a unified architecture for the Semantic Web, our study of the Semantic Web architecture highlighted some weaknesses that existed in the previous architectures, modify, adapt and reach a new architecture that corrects these weaknesses.

Haytham T. Al-Feel; Magdy Koutb; Hoda Suoror

2008-01-01

20

Wireless Sensor Network Architectures for Different Systems  

Directory of Open Access Journals (Sweden)

Full Text Available Recent technological advances enabled the design andproliferation of wireless sensor networks capable ofautonomously monitoring and controlling environments. Oneof the most promising applications of sensor networks is forhuman health monitoring. The wireless body area networkspromise to revolutionize health monitoring. Within a smartbuilding many sensors and actuators are interconnected to forma control system. Here a web services-based approach tointegrate resource constrained sensor and actuator nodes intoIP-based networks. A key feature of this approach is itscapability for automatic service discovery. IntelligentVehicular Systems (IVSs) emerged as a potential candidate forbenefiting from the unique features and capabilities of WSNs.In IVSs, transportation infrastructure is supported with theingenious achievements of computer and informationtechnology to resolve severe situations like traffic congestionand cope with emergency conditions like major accidents.

Sanjeev Narayan Bal

2012-01-01

 
 
 
 
21

Developing a Secure Web Service Architecture for SVG Image Delivery  

Directory of Open Access Journals (Sweden)

Full Text Available Web Services are substantially growing and become vital for businesses and organizations. A major concern, especially for mission-critical applications is Security. This study focuses on developing Scalable Vector Graphics (SVG) as Web services. In particular, we develop a service-oriented architecture that securely manages SVG Web services using the intermediary design pattern. In the proposed architecture we introduced two kinds of specialized security intermediaries to enforce SVG signature/authentication and encryption/decryption. A prototype of the proposed architecture has been implemented based on Apache Axis.

Sabah Mohammed; Jinan Fiaidhi; Hamada Ghenniwa; Marshall Hahn

2006-01-01

22

DESIGNING DEPENDABLE AGILE LAYERED WEB SERVICES SECURITY ARCHITECTURE SOLUTIONS  

Directory of Open Access Journals (Sweden)

Full Text Available Service Orientation Engineering (SOE) (using Web Services) and Agile modeling software development presents promising solutions for contemporary software development projects to deal effectively withchallenges in increasingly turbulent business environments typified by unpredictable markets, changing customer requirements, pressures of even shorter time to deliver, and rapidly advancing informationtechnologies. Web Services Security Architectures have three layers, as provided by NIST standard: Web Service Layer, Web Services Framework Layer (.NET or J2EE), and Web Server Layer. In services oriented web services architecture, business processes are executed as a composition of services, which can suffer from vulnerabilities pertaining to secure data access and protecting code of Web Services. The goal of the Web services security architecture is to summary out the details of message-level security from the mainstream business logic, with a focus on Web Service contract design and versioning for SOA. Service oriented web services architectures impose additional analysis complexity as they provide much flexibility and frequentchanges with in orchestrated processes and services. In this paper, we discuss about developing dependable solutions for Web Services Security Architectures using Agile Layered security architectures in terms of Privacy requirements. All this research is motivated by Secure Service Oriented Analysis and Design research domain. We initially validate this by a BPEL Editor using GWT for RBAC and Privacy. Finally a real world case study is implemented using J2EE, for validating our approach. Secure Stock Exchange System using Web Services is to automate the stock exchange works, and can help user make the decisions when it comes to investment.

M.UPENDRA KUMAR; Dr.D.SRAVAN KUMAR; Dr. B.PADMAJA RANI; K.VENKATESWARA RAO

2011-01-01

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WebSpy: An Architecture for Monitoring Web Server Availability in a Multi-Platform Environment  

Directory of Open Access Journals (Sweden)

Full Text Available For an electronic business (e-business), customer satisfaction can be the difference between long-term success and short-term failure. Customer satisfaction is highly impacted by Web server availability, as customers expect a Web site to be available twenty-four hours a day and seven days a week. Unfortunately, unscheduled Web server downtime is often beyond the control of the organization. What is needed is an effective means of identifying and recovering from Web server downtime in order to minimize the negative impact on the customer. An automated architecture, called WebSpy, has been developed to notify administration and to take immediate action when Web server downtime is detected. This paper describes the WebSpy architecture and differentiates it from other popular Web monitoring tools. The results of a case study are presented as a means of demonstrating WebSpy's effectiveness in monitoring Web server availability.

Madhan Mohan Thirukonda; Shirley Ann Becker

2002-01-01

24

Inversion of Web Service Invocation using Publish/Subscribe Push-Based Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Among enterprise application integration solutions, Web services technologies are promising technologies to achieve the interoperability in heterogeneous environments. However, traditional Web service invocation may lead to unnecessary network traffic, long response time, and bottleneck problems at service providers. While a publish/subscribe model provides an advantage of prompt notification which can eliminate unnecessary network traffic, its achievement in interoperability is limited. By integrating Web services technologies with a publish/subscribe model, a pull-based architecture and a push-based architecture are mentioned in this paper. The pull-based architecture uses the integrated solution based on traditional Web service invocation, still the bottleneck problems at service providers are likely to occur. Therefore, we propose an alternative, the push-based architecture which presents an innovative approach of using inversion of Web service invocation. Instead of letting service clients invoke services at service providers as usual, the service clients simply wait for updated information from the service providers. Experimental results showed that the response time was significantly minimized and the bottleneck problems at service providers were eliminated in the push-based architecture. Thus, service providers can be very small and thin in ubiquitous computing such as sensor or mobile devices.

Thanisa Numnonda; Rattakorn Poonsuph

2012-01-01

25

Visual Architecture based Web Information Extraction  

Directory of Open Access Journals (Sweden)

Full Text Available The World Wide Web has more online web database which can be searched through their web query interface. Deep Web contents are accessed by queries submitted to Web databases and the returned data records are enwrapped in dynamically generated Web pages. Extracting structured data from deep Web pages is a challenging task due to the underlying complicate structures of such pages. Until now, a large number of techniques have been proposed to address this problem, but all of them have inherent limitations because they are Web-page-programming-language dependent. As the popular two-dimensional media, the contents on Web pages are always displayed regularly for users to browse. This motivates us to seek a different way for deep Web data extraction to overcome the limitations of previous works by utilizing some interesting common visual features on the deep Web pages. In this paper, a novel vision-based approach that is Web-page programming- language-independent is proposed. This approach primarily utilizes the visual features on the deep Web pages to implement deep Web data extraction, including data record extraction and data item extraction.

S. Oswalt Manoj

2011-01-01

26

An Open Distributed Architecture for Sensor Networks for Risk Management  

Directory of Open Access Journals (Sweden)

Full Text Available Sensors provide some of the basic input data for risk management of natural andman-made hazards. Here the word ‘sensors’ covers everything from remote sensingsatellites, providing invaluable images of large regions, through instruments installed on theEarth’s surface to instruments situated in deep boreholes and on the sea floor, providinghighly-detailed point-based information from single sites. Data from such sensors is used inall stages of risk management, from hazard, vulnerability and risk assessment in the preeventphase, information to provide on-site help during the crisis phase through to data toaid in recovery following an event. Because data from sensors play such an important part inimproving understanding of the causes of risk and consequently in its mitigation,considerable investment has been made in the construction and maintenance of highlysophisticatedsensor networks. In spite of the ubiquitous need for information from sensornetworks, the use of such data is hampered in many ways. Firstly, information about thepresence and capabilities of sensor networks operating in a region is difficult to obtain dueto a lack of easily available and usable meta-information. Secondly, once sensor networkshave been identified their data it is often difficult to access due to a lack of interoperability between dissemination and acquisition systems. Thirdly, the transfer and processing ofinformation from sensors is limited, again by incompatibilities between systems. Therefore,the current situation leads to a lack of efficiency and limited use of the available data thathas an important role to play in risk mitigation. In view of this situation, the EuropeanCommission (EC) is funding a number of Integrated Projects within the Sixth FrameworkProgramme concerned with improving the accessibility of data and services for riskmanagement. Two of these projects: ‘Open Architecture and Spatial Data Infrastructure forRisk Management’ (ORCHESTRA, http://www.eu-orchestra.org/) and ‘Sensors Anywhere’(SANY, http://sany-ip.eu/) are discussed in this article. These projects have developed anopen distributed information technology architecture and have implemented web servicesfor the accessing and using data emanating, for example, from sensor networks. Thesedevelopments are based on existing data and service standards proposed by internationalorganizations. The projects seek to develop the ideals of the EC directive INSPIRE(http://inspire.jrc.it), which was launched in 2001 and whose implementation began this year(2007), into the risk management domain. Thanks to the open nature of the architecture andservices being developed within these projects, they can be implemented by any interestedparty and can be accessed by all potential users. The architecture is based around a serviceorientedapproach that makes use of Internet-based applications (web services) whose inputsand outputs conform to standards. The benefit of this philosophy is that it is expected tofavor the emergence of an operational market for risk management services in Europe, iteliminates the need to replace or radically alter the hundreds of already operational ITsystems in Europe (drastically lowering costs for users), and it allows users and stakeholdersto achieve interoperability while using the system most adequate to their needs, budgets,culture etc. (i.e. it has flexibility).

John Douglas; Thomas Usländer; Gerald Schimak; J. Fernando Esteban; Ralf Denzer

2008-01-01

27

Enabling Context-Aware Web Services Methods, Architectures, and Technologies  

CERN Document Server

With recent advances in radio-frequency identification (RFID) technology, sensor networks, and enhanced Web services, the original World Wide Web is continuing its evolution into what is being called the Web of Things and Services. Such a Web will support an ultimately interactive environment where everyday physical objects such as buildings, sidewalks, and commodities become recognizable, addressable, and even controllable via a mostly ubiquitous Web. This integration of the physical and virtual worlds will fundamentally impact the way we live and in doing so afford tremendous new business op

Sheng, Quan Z

2010-01-01

28

Designing Dependable Service Oriented Web Services Security Architectures Solutions  

Directory of Open Access Journals (Sweden)

Full Text Available System Security Architecture from a software engineering viewpoint imposes that strong security must be a guiding principle of the entire software development process. It describes a way to weave security into systems architecture, and it identifies common patterns of implementation found in most security products. The security and software engineering communities must find ways to develop software correctly in a timely and cost-effective fashion. There’s no substitute for working software security as deeply into the evelopment process as possible. System designers and developers must take a more proactive role in building secure software. The root of most security problems is software that fails in unexpected ways whenunder attack. The enforcement of security at the design phase canreduce the cost and effort associated with the introduction of security during implementation. At the architecture level a systemmust be coherent and present unified security architecture that takes into account security principles (such as the least privilege). In this paper we want to discuss about different facets of security as applicable to Service Oriented Architectures (SOA) Security Architecture implementations. First we examine the securityrequirements and its solution mechanisms. In the context of WebServices, the predominant SOA implementation standard has a crucial role to play. The Web Services architecture is expected to play a prominent role in developing next generation distributed systems. Building dependable systems based on web services architecture is a major research issue being discussed. Finally, we provide a case study of Web Services Security Architecture, enhancing its security pertaining to Web 2.0 AJAX (Asynchronous JavaScript and XML) and its Security encryption of data using MD5algorithm.

Dr.D.Sravan Kumar; M.Upendra Kumar

2010-01-01

29

Electrochemical Biosensors - Sensor Principles and Architectures.  

UK PubMed Central (United Kingdom)

Quantification of biological or biochemical processes are of utmost importance for medical, biological and biotechnological applications. However, converting the biological information to an easily processed electronic signal is challenging due to the complexity of connecting an electronic device directly to a biological environment. Electrochemical biosensors provide an attractive means to analyze the content of a biological sample due to the direct conversion of a biological event to an electronic signal. Over the past decades several sensing concepts and related devices have been developed. In this review, the most common traditional techniques, such as cyclic voltammetry, chronoamperometry, chronopotentiometry, impedance spectroscopy, and various field-effect transistor based methods are presented along with selected promising novel approaches, such as nanowire or magnetic nanoparticle-based biosensing. Additional measurement techniques, which have been shown useful in combination with electrochemical detection, are also summarized, such as the electrochemical versions of surface plasmon resonance, optical waveguide lightmode spectroscopy, ellipsometry, quartz crystal microbalance, and scanning probe microscopy.The signal transduction and the general performance of electrochemical sensors are often determined by the surface architectures that connect the sensing element to the biological sample at the nanometer scale. The most common surface modification techniques, the various electrochemical transduction mechanisms, and the choice of the recognition receptor molecules all influence the ultimate sensitivity of the sensor. New nanotechnology-based approaches, such as the use of engineered ion-channels in lipid bilayers, the encapsulation of enzymes into vesicles, polymersomes, or polyelectrolyte capsules provide additional possibilities for signal amplification.In particular, this review highlights the importance of the precise control over the delicate interplay between surface nano-architectures, surface functionalization and the chosen sensor transducer principle, as well as the usefulness of complementary characterization tools to interpret and to optimize the sensor response.

Grieshaber D; MacKenzie R; Vörös J; Reimhult E

2008-03-01

30

Securing Wireless Sensor Networks: Security Architectures  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless sensor networking remains one of the most exciting and challenging research domains of our time. As technology progresses, so do the capabilities of sensor networks. Limited only by what can be technologically sensed, it is envisaged that wireless sensor networks will play an important part in our daily lives in the foreseeable future. Privy to many types of sensitive information, both sensed and disseminated, there is a critical need for security in a number of applications related to this technology. Resulting from the continuous debate over the most effective means of securing wireless sensor networks, this paper considers a number of the security architectures employed, and proposed, to date, with this goal in sight. They are presented such that the various characteristics of each protocol are easily identifiable to potential network designers, allowing a more informed decision to be made when implementing a security protocol for their intended application. Authentication is the primary focus, as the most malicious attacks on a network are the work of imposters, such as DOS attacks, packet insertion etc. Authentication can be defined as a security mechanism, whereby, the identity of a node in the network can be identified as a valid node of the network. Subsequently, data authenticity can be achieved; once the integrity of the message sender/receiver has been established.

David Boyle; Thomas Newe

2008-01-01

31

Web Services Security Architectures for Secure Service Oriented Analysis and Design  

Directory of Open Access Journals (Sweden)

Full Text Available This paper discusses the research methodology on Web Services Security Architectures for Secure Service Oriented Analysis and Design. Initially we discuss about the Research Methodology for Designing Dependable Agile Layered Security Architecture Solutions for Web Services Security Architectures. Finally we discuss an implementation case study of ensuring data security architecture on Web Services Cloud

D.Shravani #1 , Dr.P.Suresh Varma*2 , Dr.B.Padmaja Rani #3 , K.Venkateswar Rao*4M.Upendra Kumar#5

2011-01-01

32

Data and Semantic Interoperability for the Oceans Sensor Web  

Science.gov (United States)

Ocean observing systems incorporate a spectrum of sensors and data. Making the data available to any interested scientist is important: data sharing and experimental reproducibility are hallmarks of the scientific process. However, different groups may represent, transport, store and distribute their data in different ways, leading to difficulties in sharing these data. OOSTethys, an open-source community effort with involvement from six regional associations and two major research institutes, is exploring the best mechanisms to make ocean data and metadata interoperable by advancing and influencing standards from the Open Geospatial Consortium (OGC), World Wide Web Consortium (W3C) and OASIS. Our strategy to address these challenges has been to envision a service oriented architecture (SOA) which comprises data providers, registries, semantic mediators, aggregators and visualizers. For each component of the system we select the most appropriate standard(s) and create cookbooks and tools to support its implementation. This improves accessibility for data providers with limited time and limited budgets for information technology projects. For example, we have created cookbooks and toolkits in Perl, Java and Python to facilitate implementation of OGC Sensor Observation Services (SOS). The implementation includes publishing metadata in SensorML, and making data available via Geographic Markup Language (GML) records conforming to the Observation and Measurements specifications. A semantic mediator implemented as a web service uses Semantic Web technologies to solve semantic incompatibilities, and enables proper categorization of the different services. Our initial results are positive: in addition to several national demonstrations of data interoperability, the cookbooks have been used to bring more than 60 oceanographic platforms online, and we have at least 7 data consumers relying on web services for their own oceanographic applications. OOSTethys work is an essential part of the OGC's Ocean Science Interoperability Experiment, which seeks more participation from the Geospatial community to advance data interoperability in Ocean Observing Systems.

Bermudez, L. E.; Bogden, P.; Bridger, E.; Conover, H.; Creager, G.; Forrest, D.; Gale, T.; Graybeal, J.; Howe, B.; Maskey, M.

2007-12-01

33

Managing Web Data in an OODB Using Web-DB Integrated Architecture  

UK PubMed Central (United Kingdom)

As a number of users and the amount of data are increasing, the management of Web data requires a moreefficient and systemized way than simple book-marking. We may obtain the benefits of databasemanagement systems, like structured query language and application programming interfaces, by storingWeb data in a conventional database. We propose a way of managing Web data in an object-orienteddatabase by representing various Web resources with classes and their relationships. The prototype systemprovides Web-based user interfaces by using Java applets which communicate with underlying databaseupon CORBA architecture.Keywords Web Data Management, Object-Oriented Database, WWW, CORBA, Java21. Introduction1.1 MotivationAs a number of Web users and the amount of data are increasing so rapidly, users feel the need of a moreefficient and systemized way of managing Web data. At present, however, one of the most popularmethods for Web data management is book-marking, supported in...

Dong-yal Seo; Jeon-young Lee; Kyung-mee Lee

34

Electrochemical Biosensors - Sensor Principles and Architectures  

Directory of Open Access Journals (Sweden)

Full Text Available Quantification of biological or biochemical processes are of utmost importancefor medical, biological and biotechnological applications. However, converting the biologicalinformation to an easily processed electronic signal is challenging due to the complexity ofconnecting an electronic device directly to a biological environment. Electrochemical biosensorsprovide an attractive means to analyze the content of a biological sample due to thedirect conversion of a biological event to an electronic signal. Over the past decades severalsensing concepts and related devices have been developed. In this review, the most commontraditional techniques, such as cyclic voltammetry, chronoamperometry, chronopotentiometry,impedance spectroscopy, and various field-effect transistor based methods are presented alongwith selected promising novel approaches, such as nanowire or magnetic nanoparticle-basedbiosensing. Additional measurement techniques, which have been shown useful in combinationwith electrochemical detection, are also summarized, such as the electrochemical versionsof surface plasmon resonance, optical waveguide lightmode spectroscopy, ellipsometry,quartz crystal microbalance, and scanning probe microscopy.The signal transduction and the general performance of electrochemical sensors are often determinedby the surface architectures that connect the sensing element to the biological sampleat the nanometer scale. The most common surface modification techniques, the various electrochemicaltransduction mechanisms, and the choice of the recognition receptor moleculesall influence the ultimate sensitivity of the sensor. New nanotechnology-based approaches,such as the use of engineered ion-channels in lipid bilayers, the encapsulation of enzymesinto vesicles, polymersomes, or polyelectrolyte capsules provide additional possibilities forsignal amplification.In particular, this review highlights the importance of the precise control over the delicateinterplay between surface nano-architectures, surface functionalization and the chosen sensortransducer principle, as well as the usefulness of complementary characterization tools tointerpret and to optimize the sensor response.

Dorothee Grieshaber; Robert MacKenzie; Janos Vörös; Erik Reimhult

2008-01-01

35

An Architecture to Implement Event-Driven Web Monitoring Systems  

Directory of Open Access Journals (Sweden)

Full Text Available Traditional monitoring systems are based on C/S mode because desktop software still has inherent advantages though desktop software is replaced by web applications rapidly in many fields. Meanwhile, traditional monitoring systems use relational database as data source, however, relational database lacks the ability to process influx of queries per second. In this paper, we will do an in-depth research to design an architecture to implement event-driven web monitoring systems.    

Gao Ying; Mu Lei; Hao Zhonghu; Zheng Weiyang

2013-01-01

36

TEACHING ARCHITECTURAL PHOTOGRAMMETRY ON THE WEB WITH ARPENTEUR  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The paper presents the main features of a digital photogrammetry software package running on the web, and its use for teaching photogrammetry. The network tool is called ARPENTEUR (Architectural PhotogrammEtry Network Tool for EdUcation and Research). Everybody can freely access ARPENTEU...

Grussenmeyer, Pierre; Drap, Pierre

37

A Hybrid Architecture for Implementing Efficient Geospatial Web Services: Integrating .Net Remoting and Web Services Technologies  

Directory of Open Access Journals (Sweden)

Full Text Available Open GIS Consortium (OGC) Geospatial Web services have been introduced to overcome spatial non-interoperability problem associated with most geospatial processing systems. Although OGC geospatial Web services provide interoperability among heterogeneous geospatial processing systems, in some cases they can not provide required performance and efficiency. This study proposes a hybrid architecture which can efficiently provide interoperability and high performance for transferring geospatial data. It is suggested that making use of Web services technologies for implementing OGC geospatial Web services would significantly facilitate sharing geospatial data in heterogeneous environments like Web. In addition, making use of a proprietary and platform-dependant technologies can provide best performance and efficiency in homogeneous environments like an internal network. In this context, design and development of an OGC geospatial Web service using hybrid architecture of Web services Technologies and .NET Remoting technology (as proprietary and .NET specific technology) is described. Based on our evaluations and practical tests, the hybrid architecture proved to be an efficient solution for development of geospatial Web services.

Pouria Amirian; Ali Alesheikh

2008-01-01

38

Advances in Sensor Webs for NASA Earth Science Missions  

Science.gov (United States)

The world is slowly evolving into a web of interconnected sensors. Innovations such as camera phones that upload directly to the internet, networked devices with built-in GPS chips, traffic sensors, and the wireless networks that connect these devices are transforming our society. Similar advances are occurring in science sensors at NASA. NASA developed autonomy software has demonstrated the potential for space missions to use onboard decision-making to detect, analyze, and respond to science events. This software has also enabled NASA satellites to coordinate with other satellites and ground sensors to form an autonomous sensor web. A vision for NASA sensor webs for Earth science is to enable "on-demand sensing of a broad array of environmental and ecological phenomena across a wide range of spatial and temporal scales, from a heterogeneous suite of sensors both in-situ and in orbit." Several technologies for improved autonomous science and sensor webs are being developed at NASA. Each of these technologies advances the state of the art in sensorwebs in different areas including enabling model interactions with sensorwebs, smart autonomous sensors, and sensorweb communications. Enabling model interactions in sensor webs is focused on the creation and management of new sensor web enabled information products. Specifically, the format of these data products and the sensor webs that use them must be standardized so that sensor web components can more easily communicate with each other. This standardization will allow new components such as models and simulations to be included within sensor webs. Smart sensing implies sophistication in the sensors themselves. The goal of smart sensing is to enable autonomous event detection and reconfiguration. This may include onboard processing, self-healing sensors, and self-identifying sensors. The goal of communication enhancements, especially session layer management, is to support dialog control for autonomous operations involving sensors and data processing and/or modeling entities. These technologies may include antenna for tracking dynamic sensors, autonomous networks and protocols that can distribute data communication tasks among the sensors and control the flow of data, transmission schemes that optimize bandwidth use, and distributed data storage devices. Demonstration of these sensorweb capabilities will enable fast responding science campaigns of both spaceborne and ground assets. These sensor webs will be operated directly by scientists using science goals to control their instruments.

Sherwood, R.; Moe, K.; Smith, S.; Prescott, G.

2007-12-01

39

Resource-oriented architecture patterns for webs of data  

CERN Document Server

The surge of interest in the REpresentational State Transfer (REST) architectural style, the Semantic Web, and Linked Data has resulted in the development of innovative, flexible, and powerful systems that embrace one or more of these compatible technologies. However, most developers, architects, Information Technology managers, and platform owners have only been exposed to the basics of resource-oriented architectures. This book is an attempt to catalog and elucidate several reusable solutions that have been seen in the wild in the now increasingly familiar ""patterns book"" style. These are

Sletten, Brian

2013-01-01

40

A Survey of Sensor Web Services for the Smart Grid  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The broad use ofWireless Sensor Networks (WSN) in various fields have resulted in growing demand for advanced data collection and querying mechanisms embedded in the sensor node. Sensor Web Services (SWS) have recently emerged as a promising tool to enable external machines to have access to the inf...

Omar Asad; Melike Erol-Kantarci; Hussein T. Mouftah

 
 
 
 
41

A Web-based Architecture Enabling Multichannel Telemedicine Applications  

Directory of Open Access Journals (Sweden)

Full Text Available Telemedicine scenarios include today in-hospital care management, remote teleconsulting, collaborative diagnosis and emergency situations handling. Different types of information need to be accessed by means of etherogeneous client devices in different communication environments in order to enable high quality continuous sanitary assistance delivery wherever and whenever needed. In this paper, a Web-based telemedicine architecture based on Java, XML and XSL technologies is presented. By providing dynamic content delivery services and Java based client applications for medical data consultation and modification, the system enables effective access to an Electronic Patient Record based standard database by means of any device equipped with a Web browser, such as traditional Personal Computers and workstation as well as modern Personal Digital Assistants. The effectiveness of the proposed architecture has been evaluated in different scenarios, experiencing fixed and mobile clinical data transmissions over Local Area Networks, wireless LANs and wide coverage telecommunication network including GSM and GPRS.

Fabrizio Lamberti; Bartolomeo Montrucchio; Andrea Sanna; Claudio Zunino

2003-01-01

42

SOA based Data Architecture for HTML5 Web Applications  

Directory of Open Access Journals (Sweden)

Full Text Available Web Services based architectures have already been established as the preferred way to integrate SOA specific components, from the front-end to the back-end business services. One of the key elements of such architecture are data-based or entity services. In this context, SDO standard and SDO related technologies have been confirmed as a possible approach to aggregate such enterprise-wide federation of data services, mainly backed by database servers, but not limited to them. In the followings, we will discuss an architectural purpose based on SDO approach to seamlessly integrate presentation and data services within an enterprise SOA context. This way we will outline the benefits of a common end-to-end data integration strategy. Also, we will try to argue that using HTML5 based clients as front end services in conjunction with SDO data services could be an effective strategy to adopt the mobile computing in the enterprise context.

Catalin STRIMBEI

2013-01-01

43

Artery: A Data-Centric Architecture for Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Sensor networks, composed of large amount of micro-sensors, are considered promising, both in academic research and in real life applications. To ensure highly efficient communications between event observers and sensor network users, new infrastructures and algorithms are being developed. This paper describes Artery, a novel architecture that delivers queries and data between multiple observers and multiple mobile users. Simulation results show that Artery outperforms some major data dissemination algorithms.

Lan Lin; Hailin Wu

2003-01-01

44

Enhanced Architecture of a Web Warehouse based on Quality Evaluation Framework to Incorporate Quality Aspects in Web Warehouse Creation  

Directory of Open Access Journals (Sweden)

Full Text Available In the recent years, it has been observed that World Wide Web (www) became a vast source of information explosion about all areas of interest. Relevant information retrieval is difficult from the web space as there is no universal configuration and organization of the web data. Taking the advantage of data warehouse functionality and integrating it with the web to retrieve relevant data is the core concept of web warehouse. It is a repository that store relevant web data for business decision making. The basic function of web warehouse is to collect and store the information for analysis of users. The quality of web warehouse data affects a lot on data analysis. To enhance the quality of decision making different quality dimensions must be incorporated in web warehouse architecture. In this paper enhanced web warehouse architecture is proposed and discussed. The enhancement in the existing architecture is based on the quality evaluation framework. The enhanced architecture adds three layers in existing architecture to insure quality at various phases of web warehouse system creation. The source assessment, query evaluation and data quality layers enhance the quality of data store in web warehouse.

Umm-e-Mariya Shah; Azra Shamim; Madiha Kazmi

2011-01-01

45

Web Services Security Architectures Composition and Contract Design using RBAC  

Directory of Open Access Journals (Sweden)

Full Text Available Service Oriented Architecture’s Web Services authorization traditionally is done using common access control models like Role-Based Access Control. In thinking of a composite application that stitches together the capabilities of multiple services, any action in the composite app should ideally check the access control rules of all constituent services before initiating an action. The WebServices Access controls are categorized according to access control granularity and have two approaches: The first approach supports a negotiation-based attribute-based access control to Web Services with fine access granularity. The second approach is tailored to access control for conversation-based Web services and composite services;where in a Web Service is not considered as a set of independent operations and therefore access control must take such dependencies into account. During a Web Services invocation, a client interacts with the service, performing a sequence of operations in a particular order called conversation. In this paper, we want to propose strategies for analyzing and managing Role Based Access Control policies for designing Security Architectures for web services. Wevalidate role-based access control with a case study, where in access decisions are based on the roles that individual users have as part of an organization. Users take on assigned roles. The process of defining roles should be based on a thorough analysis of how an organization operates and should include input from a wide spectrum of users in an organization. Access rights are grouped by role name, and the use of resources is restricted to individuals authorized toassume the associated role. For example, within a hospital system the role of doctor can include operations to perform diagnosis, prescribe medication, and order laboratory tests; and the role of researcher can be limited to gathering anonymous clinical information for studies. The use of roles to control access can be an effective means for developing and enforcing enterprise-specific security policies, and for streamlining the security management process. Under theRBAC framework, users are granted membership into roles based on their competencies and responsibilities in the organization. The operations that a user is permitted to perform are based on the user's role.

D.Shravani; Dr.P.Suresh Varma; Dr.B.Padmaja Rani,; , Dr.D.Sravan Kumar,; M.Upendra Kumar

2010-01-01

46

New architecture of sensor for the snapshot video  

Energy Technology Data Exchange (ETDEWEB)

In this article, the authors propose a new sensor architecture for snapshot video. This sensor has the distinctive feature of memorizing of a sequence of images. The realization of the sensor permits the authors to study the transfer operation in a full custom implementation. For this reason they have developed at GERE Laboratory in Le Creusot, in collaboration with LIRMM Laboratory in Montpellier, the experimental transfer circuits. First, they present in this article the internal architecture of the sensor circuit. Next, they describe the elementary cell which is composed of a photosensitive element and memory zones. Thirdly, they describe the transfer circuit and they discuss in detail the study done on it. Finally, they conclude on the feasibility of the specific sensor circuit.

Elloumi, M.; Fauvet, E.; Dumont, C. [Univ. de Bourgogne, Le Creusot (France). Lab. GERE; Cathebras, G.; Robert, M. [LIRMM Lab., Montpellier (France)

1995-12-31

47

A SURVEY ON WIRELESS SENSOR NETWORK ARCHITECTURE, PROTOCOLS AND APPLICATIONS  

Directory of Open Access Journals (Sweden)

Full Text Available In this paper, we survey the current state of the art in wireless sensor network which has been gaining interest platform that changes how we interact with the physical world. Today, researchers and practitioners utilize low power nodes composed of wireless radios, sensors and computing elements for a variety of applications in medicine military, biology, manufacturing, etc. Most of wireless sensor networks use off-the-shelf commodity based micro-controllers, through the energy consumption of these systems can limit the effective lifetimes of the wireless sensor network nodes. We provide a discussion on the definition of wireless sensor network, design architecture, issues in various protocols and various applications of wireless sensor network. Keywords- Wireless Sensor Networks, local storage, alternative routing

Dr. M. Lilly Florence

2011-01-01

48

A SURVEY ON WIRELESS SENSOR NETWORK ARCHITECTURE, PROTOCOLS AND APPLICATIONS  

Directory of Open Access Journals (Sweden)

Full Text Available In this paper, we survey the current state of the art in wireless sensor network which has been gaining interest platform that changes how we interact with the physical world. Today, researchers and practitioners utilize low power nodes composed of wireless radios, sensors and computing elements for a variety of applications in medicine military, biology, manufacturing, etc. Most of wireless sensor networks use off-the-shelf commodity based microcontrollers, through the energy consumption of these systems can limit the effective lifetimes of the wireless sensor network nodes. We provide a discussion on the definition of wireless sensor network, design architecture, issues in various protocols and various applications of wireless sensor network. Keywords: Wireless Sensor Networks, local storage, alternative routing

Dr. M. Lilly Florence

2011-01-01

49

Semantically-Enabled Sensor Plug & Play for the Sensor Web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Environmental sensors have continuously improved by becoming smaller, cheaper, and more intelligent over the past years. As consequence of these technological advancements, sensors are increasingly deployed to monitor our environment. The large variety of available sensor types with often incompatib...

Arne Bröring; Patrick Maué; Krzysztof Janowicz; Daniel Nüst; Christian Malewski

50

Collaborative Learning under an Adaptive Web-based Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available In any one class, there are differences between student`s abilities, interests, achievements, preferences and learning behaviors. Some need a challenging class, promoting their level. Some of them want to keep to the working routine. Others need to be taught very slowly. This situation is particularly notable in mathematics instruction. Many teachers feel frustrated because they want to provide for all student`s needs and abilities but are constrained by time and space. In this study, we propose an adaptive web-based learning architecture, based on a collaborative model and a tutor model, to help solve the problem. Students can learn at their own pace, constructing knowledge by collaborative learning and using tutor assistance to solve their problems immediately. The research on our learning architecture was conducted with fourth grade primary school students learning fractional operation.

H.C. Chiang; C.C. Yang; Y.P. Chu

2005-01-01

51

Web based aphasia test using service oriented architecture (SOA)  

Energy Technology Data Exchange (ETDEWEB)

Based on an aphasia test for Spanish speakers which analyze the patient's basic resources of verbal communication, a web-enabled software was developed to automate its execution. A clinical database was designed as a complement, in order to evaluate the antecedents (risk factors, pharmacological and medical backgrounds, neurological or psychiatric symptoms, brain injury -anatomical and physiological characteristics, etc) which are necessary to carry out a multi-factor statistical analysis in different samples of patients. The automated test was developed following service oriented architecture and implemented in a web site which contains a tests suite, which would allow both integrating the aphasia test with other neuropsychological instruments and increasing the available site information for scientific research. The test design, the database and the study of its psychometric properties (validity, reliability and objectivity) were made in conjunction with neuropsychological researchers, who participate actively in the software design, based on the patients or other subjects of investigation feedback.

Voos, J A [Clinical Engineering R and D Center, Universidad Tecnologica Nacional, Facultad Regional Cordoba, Cordoba (Argentina); Vigliecca, N S [Consejo Nacional de Investigaciones Cientificas y Tecnicas, CONICET, Cordoba (Argentina); Gonzalez, E A [Clinical Engineering R and D Center, Universidad Tecnologica Nacional, Facultad Regional Cordoba, Cordoba (Argentina)

2007-11-15

52

Web based aphasia test using service oriented architecture (SOA)  

International Nuclear Information System (INIS)

Based on an aphasia test for Spanish speakers which analyze the patient's basic resources of verbal communication, a web-enabled software was developed to automate its execution. A clinical database was designed as a complement, in order to evaluate the antecedents (risk factors, pharmacological and medical backgrounds, neurological or psychiatric symptoms, brain injury -anatomical and physiological characteristics, etc) which are necessary to carry out a multi-factor statistical analysis in different samples of patients. The automated test was developed following service oriented architecture and implemented in a web site which contains a tests suite, which would allow both integrating the aphasia test with other neuropsychological instruments and increasing the available site information for scientific research. The test design, the database and the study of its psychometric properties (validity, reliability and objectivity) were made in conjunction with neuropsychological researchers, who participate actively in the software design, based on the patients or other subjects of investigation feedback.

2007-01-01

53

Web based aphasia test using service oriented architecture (SOA)  

Science.gov (United States)

Based on an aphasia test for Spanish speakers which analyze the patient's basic resources of verbal communication, a web-enabled software was developed to automate its execution. A clinical database was designed as a complement, in order to evaluate the antecedents (risk factors, pharmacological and medical backgrounds, neurological or psychiatric symptoms, brain injury -anatomical and physiological characteristics, etc) which are necessary to carry out a multi-factor statistical analysis in different samples of patients. The automated test was developed following service oriented architecture and implemented in a web site which contains a tests suite, which would allow both integrating the aphasia test with other neuropsychological instruments and increasing the available site information for scientific research. The test design, the database and the study of its psychometric properties (validity, reliability and objectivity) were made in conjunction with neuropsychological researchers, who participate actively in the software design, based on the patients or other subjects of investigation feedback.

Voos, J. A.; Vigliecca, N. S.; Gonzalez, E. A.

2007-11-01

54

ESB-Based Sensor Web Integration for the Prediction of Electric Power Supply System Vulnerability.  

UK PubMed Central (United Kingdom)

Electric power supply companies increasingly rely on enterprise IT systems to provide them with a comprehensive view of the state of the distribution network. Within a utility-wide network, enterprise IT systems collect data from various metering devices. Such data can be effectively used for the prediction of power supply network vulnerability. The purpose of this paper is to present the Enterprise Service Bus (ESB)-based Sensor Web integration solution that we have developed with the purpose of enabling prediction of power supply network vulnerability, in terms of a prediction of defect probability for a particular network element. We will give an example of its usage and demonstrate our vulnerability prediction model on data collected from two different power supply companies. The proposed solution is an extension of the GinisSense Sensor Web-based architecture for collecting, processing, analyzing, decision making and alerting based on the data received from heterogeneous data sources. In this case, GinisSense has been upgraded to be capable of operating in an ESB environment and combine Sensor Web and GIS technologies to enable prediction of electric power supply system vulnerability. Aside from electrical values, the proposed solution gathers ambient values from additional sensors installed in the existing power supply network infrastructure. GinisSense aggregates gathered data according to an adapted Omnibus data fusion model and applies decision-making logic on the aggregated data. Detected vulnerabilities are visualized to end-users through means of a specialized Web GIS application.

Stoimenov L; Bogdanovic M; Bogdanovic-Dinic S

2013-01-01

55

ESB-Based Sensor Web Integration for the Prediction of Electric Power Supply System Vulnerability  

Directory of Open Access Journals (Sweden)

Full Text Available Electric power supply companies increasingly rely on enterprise IT systems to provide them with a comprehensive view of the state of the distribution network. Within a utility-wide network, enterprise IT systems collect data from various metering devices. Such data can be effectively used for the prediction of power supply network vulnerability. The purpose of this paper is to present the Enterprise Service Bus (ESB)-based Sensor Web integration solution that we have developed with the purpose of enabling prediction of power supply network vulnerability, in terms of a prediction of defect probability for a particular network element. We will give an example of its usage and demonstrate our vulnerability prediction model on data collected from two different power supply companies. The proposed solution is an extension of the GinisSense Sensor Web-based architecture for collecting, processing, analyzing, decision making and alerting based on the data received from heterogeneous data sources. In this case, GinisSense has been upgraded to be capable of operating in an ESB environment and combine Sensor Web and GIS technologies to enable prediction of electric power supply system vulnerability. Aside from electrical values, the proposed solution gathers ambient values from additional sensors installed in the existing power supply network infrastructure. GinisSense aggregates gathered data according to an adapted Omnibus data fusion model and applies decision-making logic on the aggregated data. Detected vulnerabilities are visualized to end-users through means of a specialized Web GIS application.

Leonid Stoimenov; Milos Bogdanovic; Sanja Bogdanovic-Dinic

2013-01-01

56

A Multi-Agent System Architecture for Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available The design of the control systems for sensor networks presents important challenges. Besides the traditional problems about how to process the sensor data to obtain the target information, engineers need to consider additional aspects such as the heterogeneity and high number of sensors, and the flexibility of these networks regarding topologies and the sensors in them. Although there are partial approaches for resolving these issues, their integration relies on ad hoc solutions requiring important development efforts. In order to provide an effective approach for this integration, this paper proposes an architecture based on the multi-agent system paradigm with a clear separation of concerns. The architecture considers sensors as devices used by an upper layer of manager agents. These agents are able to communicate and negotiate services to achieve the required functionality. Activities are organized according to roles related with the different aspects to integrate, mainly sensor management, data processing, communication and adaptation to changes in the available devices and their capabilities. This organization largely isolates and decouples the data management from the changing network, while encouraging reuse of solutions. The use of the architecture is facilitated by a specific modelling language developed through metamodelling. A case study concerning a generic distributed system for fire fighting illustrates the approach and the comparison with related work.

Rubén Fuentes-Fernández; María Guijarro; Gonzalo Pajares

2009-01-01

57

A multi-agent system architecture for sensor networks.  

UK PubMed Central (United Kingdom)

The design of the control systems for sensor networks presents important challenges. Besides the traditional problems about how to process the sensor data to obtain the target information, engineers need to consider additional aspects such as the heterogeneity and high number of sensors, and the flexibility of these networks regarding topologies and the sensors in them. Although there are partial approaches for resolving these issues, their integration relies on ad hoc solutions requiring important development efforts. In order to provide an effective approach for this integration, this paper proposes an architecture based on the multi-agent system paradigm with a clear separation of concerns. The architecture considers sensors as devices used by an upper layer of manager agents. These agents are able to communicate and negotiate services to achieve the required functionality. Activities are organized according to roles related with the different aspects to integrate, mainly sensor management, data processing, communication and adaptation to changes in the available devices and their capabilities. This organization largely isolates and decouples the data management from the changing network, while encouraging reuse of solutions. The use of the architecture is facilitated by a specific modelling language developed through metamodelling. A case study concerning a generic distributed system for fire fighting illustrates the approach and the comparison with related work.

Fuentes-Fernández R; Guijarro M; Pajares G

2009-01-01

58

Wireless Sensor Network (WSN): Architectural Design issues and Challenges  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless sensor network (WSN) is an infrastructure less, low cost, dynamic topology, appplication oriented, multihoping network design with small, low power, sensing wireless distributed nods. WSN designing become more complex due to characterstics of deploying nodes, security, authentication and its operation scenario. This paper presents an analytical view on WSN architecture design issues, its objectives andimplementation challenges.

Ajay Jangra; Swati; Richa,; Priyanka

2010-01-01

59

A sensor architecture for neutrino telescopes  

International Nuclear Information System (INIS)

In the Mediterranean Sea the ANTARES telescope is operating since 2006. Building on the success of this telescope and on the experiences of the DUMAND, IceCube, NEMO and NESTOR projects, a design for a new generation deep-sea neutrino telescope has been developed, which relies on the paradigm of the neutrino telescope as a giant sensor. Slender flexible strings with optical sensors form the basic building blocks for the telescope. The sensor concept has been implemented using photonic technologies for readout, data acquisition and communication, which allow for migration of functionalities from the deep-sea to the shore. This is one of the detector designs options developed during the EU funded KM3NeT Design Study. We will present its concept and implications for the detector as a whole.

2011-01-01

60

A HIERARCHICAL INTRUSION DETECTION ARCHITECTURE FOR WIRELESS SENSOR NETWORKS  

Directory of Open Access Journals (Sweden)

Full Text Available Networks protection against different types of attacks is one of most important posed issue into the network andinformation security application domains. This problem on Wireless Sensor Networks (WSNs), in attention to theirspecial properties, has more importance. Now, there are some of proposed architectures and guide lines to protectWireless Sensor Networks (WSNs) against different types of intrusions; but any one of them do not has acomprehensive view to this problem and they are usually designed and implemented in single-purpose; but, theproposed design in this paper tries to has been a comprehensive view to this issue by presenting a complete andcomprehensive Intrusion Detection Architecture (IDA). The main contribution of this architecture is its hierarchicalstructure; i.e., it is designed and applicable, in one or two levels, consistent to the application domain and itsrequired security level. Focus of this paper is on the clustering WSNs, designing and deploying Cluster-basedIntrusion Detection System (CIDS) on cluster-heads and Wireless Sensor Network wide level Intrusion DetectionSystem (WSNIDS) on the central server. Suppositions of the WSN and Intrusion Detection Architecture (IDA) are:static and heterogeneous network, hierarchical and clustering structure, clusters' overlapping and using hierarchicalrouting protocol such as LEACH, but along with minor changes. Finally, the proposed idea has been verified bydesigning a questionnaire, representing it to some (about 50 people) experts and then, analyzing and evaluating itsacquired results.

Hossein Jadidoleslamy

2011-01-01

 
 
 
 
61

Service-Oriented Architectures and Web Services: Course Tutorial Notes  

CERN Document Server

This document presents a number of quick-step instructions to get started on writing mini-service-oriented web services-based applications using NetBeans 6.5.x, Tomcat 6, GlassFish 2.1, and Java 1.6 primarily in Fedora 9 Linux with user quota restrictions. While the tutorial notes are oriented towards the students taking the SOEN691A course on service-oriented architectures (SOA) at Computer Science and Software Engineering (CSE) Department, Faculty of Engineering and Computer Science (ENCS), other may find some of it useful as well outside of CSE or Concordia. The notes are compiled mostly based on the students' needs and feedback.

Mokhov, Serguei A

2009-01-01

62

Sensor Architecture and Task Classification for Agricultural Vehicles and Environments  

Directory of Open Access Journals (Sweden)

Full Text Available The long time wish of endowing agricultural vehicles with an increasing degree of autonomy is becoming a reality thanks to two crucial facts: the broad diffusion of global positioning satellite systems and the inexorable progress of computers and electronics. Agricultural vehicles are currently the only self-propelled ground machines commonly integrating commercial automatic navigation systems. Farm equipment manufacturers and satellite-based navigation system providers, in a joint effort, have pushed this technology to unprecedented heights; yet there are many unresolved issues and an unlimited potential still to uncover. The complexity inherent to intelligent vehicles is rooted in the selection and coordination of the optimum sensors, the computer reasoning techniques to process the acquired data, and the resulting control strategies for automatic actuators. The advantageous design of the network of onboard sensors is necessary for the future deployment of advanced agricultural vehicles. This article analyzes a variety of typical environments and situations encountered in agricultural fields, and proposes a sensor architecture especially adapted to cope with them. The strategy proposed groups sensors into four specific subsystems: global localization, feedback control and vehicle pose, non-visual monitoring, and local perception. The designed architecture responds to vital vehicle tasks classified within three layers devoted to safety, operative information, and automatic actuation. The success of this architecture, implemented and tested in various agricultural vehicles over the last decade, rests on its capacity to integrate redundancy and incorporate new technologies in a practical way.

Francisco Rovira-Más

2010-01-01

63

Scientific Workflows and the Sensor Web for Virtual Environmental Observatories  

Science.gov (United States)

Virtual observatories mature from their original domain and become common practice for earth observation research and policy building. The term Virtual Observatory originally came from the astronomical research community. Here, virtual observatories provide universal access to the available astronomical data archives of space and ground-based observatories. Further on, as those virtual observatories aim at integrating heterogeneous ressources provided by a number of participating organizations, the virtual observatory acts as a coordinating entity that strives for common data analysis techniques and tools based on common standards. The Sensor Web is on its way to become one of the major virtual observatories outside of the astronomical research community. Like the original observatory that consists of a number of telescopes, each observing a specific part of the wave spectrum and with a collection of astronomical instruments, the Sensor Web provides a multi-eyes perspective on the current, past, as well as future situation of our planet and its surrounding spheres. The current view of the Sensor Web is that of a single worldwide collaborative, coherent, consistent and consolidated sensor data collection, fusion and distribution system. The Sensor Web can perform as an extensive monitoring and sensing system that provides timely, comprehensive, continuous and multi-mode observations. This technology is key to monitoring and understanding our natural environment, including key areas such as climate change, biodiversity, or natural disasters on local, regional, and global scales. The Sensor Web concept has been well established with ongoing global research and deployment of Sensor Web middleware and standards and represents the foundation layer of systems like the Global Earth Observation System of Systems (GEOSS). The Sensor Web consists of a huge variety of physical and virtual sensors as well as observational data, made available on the Internet at standardized interfaces. All data sets and sensor communication follow well-defined abstract models and corresponding encodings, mostly developed by the OGC Sensor Web Enablement initiative. Scientific progress is currently accelerated by an emerging new concept called scientific workflows, which organize and manage complex distributed computations. A scientific workflow represents and records the highly complex processes that a domain scientist typically would follow in exploration, discovery and ultimately, transformation of raw data to publishable results. The challenge is now to integrate the benefits of scientific workflows with those provided by the Sensor Web in order to leverage all resources for scientific exploration, problem solving, and knowledge generation. Scientific workflows for the Sensor Web represent the next evolutionary step towards efficient, powerful, and flexible earth observation frameworks and platforms. Those platforms support the entire process from capturing data, sharing and integrating, to requesting additional observations. Multiple sites and organizations will participate on single platforms and scientists from different countries and organizations interact and contribute to large-scale research projects. Simultaneously, the data- and information overload becomes manageable, as multiple layers of abstraction will free scientists to deal with underlying data-, processing or storage peculiarities. The vision are automated investigation and discovery mechanisms that allow scientists to pose queries to the system, which in turn would identify potentially related resources, schedules processing tasks and assembles all parts in workflows that may satisfy the query.

Simonis, I.; Vahed, A.

2008-12-01

64

Digital Pixel Sensor Array with Logarithmic Delta-Sigma Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Like the human eye, logarithmic image sensors achieve wide dynamic range easily at video rates, but, unlike the human eye, they suffer from low peak signal-to-noise-and-distortion ratios (PSNDRs). To improve the PSNDR, we propose integrating a delta-sigma analog-to-digital converter (ADC) in each pixel. An image sensor employing this architecture is designed, built and tested in 0.18 micron complementary metal-oxide-semiconductor (CMOS) technology. It achieves a PSNDR better than state-of-the-art logarithmic sensors and comparable to the human eye. As the approach concerns an array of many ADCs, we use a small-area low-power delta-sigma design. For scalability, each pixel has its own decimator. The prototype is compared to a variety of other image sensors, linear and nonlinear, from industry and academia.

Alireza Mahmoodi; Jing Li; Dileepan Joseph

2013-01-01

65

Digital pixel sensor array with logarithmic delta-sigma architecture.  

UK PubMed Central (United Kingdom)

Like the human eye, logarithmic image sensors achieve wide dynamic range easily at video rates, but, unlike the human eye, they suffer from low peak signal-to-noise-and-distortion ratios (PSNDRs). To improve the PSNDR, we propose integrating a delta-sigma analog-to-digital converter (ADC) in each pixel. An image sensor employing this architecture is designed, built and tested in 0.18 micron complementary metal-oxide-semiconductor (CMOS) technology. It achieves a PSNDR better than state-of-the-art logarithmic sensors and comparable to the human eye. As the approach concerns an array of many ADCs, we use a small-area low-power delta-sigma design. For scalability, each pixel has its own decimator. The prototype is compared to a variety of other image sensors, linear and nonlinear, from industry and academia.

Mahmoodi A; Li J; Joseph D

2013-01-01

66

An Architecture of Mobile Web 2.0 Context-aware Applications in Ubiquitous Web  

Directory of Open Access Journals (Sweden)

Full Text Available The rapid development of the wireless communication technologies, including wireless sensors, intelligent mobile devices, and communication protocols, has led to diverse mobile devices of accessing various context-aware systems. Existing context-aware systems only focus on characterize the situation of an entity to exhibit the advantage of contextual information association. The contextual information can represent semantic implications to provide decidable reasoning services, but it has no mechanism to facilitating the interoperability and reusability among heterogeneous context-aware systems and various mobile devices. This study addresses these issues developing a Multi-layer Context Framework (MCF) that integrates Web 2.0 technologies into context-aware system for supporting ubiquitous mobile environment. The proposed MCF includes context sensor layer, context information layer, context service layer, context representation layer, mobile device layer, and context-aware mobile Web 2.0 application layer. To demonstrate the feasibility of the infrastructure, a Mobile Web 2.0-based Context-aware Attendance Monitoring System (MWCAMS) is implemented with ZigBee devices to provide continuous and context-aware monitoring of employee attendance status.

I-Ching Hsu

2011-01-01

67

An architecture for autonomic web service process planning  

Digital Repository Infrastructure Vision for European Research (DRIVER)

considerable attention in the last number of years. Languages and tools to aid in the process of creating composite web services have been received specific attention. Web service composition is the process of linking single web services toge...

Moore, Colm; Xue Wang, Ming; Pahl, Claus

68

A Wireless Sensor Network Architecture for Diversiform Deployment Environments  

Directory of Open Access Journals (Sweden)

Full Text Available Network architecture is the foundation of network system. Wireless sensor networks (WSN) are always concentrated some key technologies under specific applications, and some prototype systems are developed according to specific applications of environments, but the research on WSN architecture is relatively weak currently. WSN is a highly complex distributed system, the defects in traditional WSN architectures are firstly studied, then the typical requirement objectives of WSN are acquired by analysis, and a set of design principles for WSN model is concluded. Because the WSN is mostly intended for variable and inhospitable environments, where persistent and continuous energy supply is lacking, the environment adaptive and energy efficient capabilities are integrant for WSN architecture. According with other objectives scalability and service-customized, an environment adaptive, energy efficient, hierarchical structure and sub-facets functions architecture model of WSN (EAWNA) is proposed. Furthermore, the design methods, general characteristics and functions of every lay or every module are described and discussed. At last, from the abstract levels of component framework, EAWNA is described formally besides all component layers entities are defined. EAWNA has not only the double characteristics: environment adaptive and energy efficient, but also has the traits such as multi-dimensional scalability, service-customized, and cross-layer interaction. EAWNA model can supply a theoretical framework and a kind of unified description method for diversified protocols in WSN.

Linfeng Liu

2011-01-01

69

Architectural Design Issues For Web-Based Virtual Reality Training Systems  

UK PubMed Central (United Kingdom)

This paper presents a surgical trainingsystem which utilises both virtual reality technology and the advantage of world wide accessibility offered by the web. Therequirements of such a system are presented and an architectural design to achieve these requirements is proposed.

Nuha H. El-khalili; Ken W. Brodlie

70

An Architecture for Autonomic Web Service Process Planning  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web service composition is a technology that has received considerable attention in the last number of years. Languages and tools to aid in the process of creating composite Web services have been received specific attention. Web service composition is the process of linking single Web services toge...

Moore, Colm; Wang, Ming Xue; Pahl, Claus

71

Semantic Web-Driven LMS Architecture towards a Holistic Learning Process Model Focused on Personalization  

Science.gov (United States)

A comprehensive presentation is here made on the modular architecture of an e-learning platform with a distinctive emphasis on content personalization, combining advantages from semantic web technology, collaborative filtering and recommendation systems. Modules of this architecture handle information about both the domain-specific didactic…

Kerkiri, Tania

2010-01-01

72

Web Service Response Time Monitoring: Architecture and Validation  

Directory of Open Access Journals (Sweden)

Full Text Available Web services are used in many Web applications in order to save time and cost during software development process. To peruse Web service response time, a suitable tool is needed to automate the measurement of the response time. However, not many suitable tools are available for automatic measurement of response time. This research is carried out in the context of quality of Web services in order to measure and visualize Web service response time. The method proposed in this research for accomplishing this goal is based on creating a proxy for connecting to the required Web service, and then calculating the Web services response time via the proxy. A software tool is designed based on the proposed method in order to guide the implementation that is still in progress. The tool can be validated through empirical validation using three test cases for three different Web service access situations.

Sara Abbaspour Asadollah; Thiam Kian Chiew

2012-01-01

73

“Wireless Sensor Networks - Architectures, Protocols, Simulators and Applications: a Survey”  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless Sensor Networks (WSNs) have emerged as a new research technology in the distributed computing environment and plays a very important role in the pervasive computing to support various applications. It has a great potential to be utilized in battlefields and in different commercial applications like traffic surveillance, habitat monitoring, construction structures, smart homes, offices and many more. Research on several aspects of WSNs like energy efficiency, power management, rouunrting, topology control, data management and security are progressing extensively. In this technical paper a survey on recent trends in wireless sensor network research, different topologies, routing protocols, simulators and applications is carried out. A smart WSN consists of sensor nodes made of small electronic device and are deployed across a geographical area. These nodes carry out the sensing, processing and transmission of data from different physical environments. They depend on batteries which get drained very soon due to the computation and data transmission to other nodes. The architectures of WSN are mainly depending on application requirements. WSN is a multidisciplinary area of research where different applications developers, users, hardware and software designers need to work closely to implement an efficient application. The different characteristics of the sensor network like flexibility, fault tolerance, high sensing fidelity, low cost and rapid deployment create many new and exciting application areas.

S. G. Shiva Prasad Yadav; Dr. A. Chitra

2012-01-01

74

Overview Of Tenet: Architecture For Tiered Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Most sensor network research and software design has been guided by an architectural principle that permits multi-node data fusion on small-form-factor, resource-poor nodes, or motes. We argue that this principle leads to fragile and unmanageable systems and explore an alternative. The Tenet architecture is motivated by the observation that future large-scale sensor network deployments will be tiered, consisting of motes in the lower tier and masters, relatively unconstrained 32-bit platform nodes, in the upper tier. Masters provide increased network capacity. Tenet constrains multimode fusion to the master tier while allowing motes to process locallygeneratedsensor data. This simplifies application development and allows mote-tier software to be reused. Applications running on masters task motes by composing task descriptions from a novel tasklet library. OurTenet implementation also contains a robust and scalable networking subsystem for disseminating tasks and reliably delivering responses. We show that a Tenet pursuit-evasion application exhibits performancecomparable to a mote-native implementation while being considerably more compact.

A.JEEVARATHINAM,; K .LAKSHMI; K. THILAGAM; K. RAMA,; MANJU PRIYA .S

2011-01-01

75

Architecture of A Scalable Dynamic Parallel WebCrawler with High Speed Downloadable Capability for a Web Search Engine  

CERN Document Server

Today World Wide Web (WWW) has become a huge ocean of information and it is growing in size everyday. Downloading even a fraction of this mammoth data is like sailing through a huge ocean and it is a challenging task indeed. In order to download a large portion of data from WWW, it has become absolutely essential to make the crawling process parallel. In this paper we offer the architecture of a dynamic parallel Web crawler, christened as "WEB-SAILOR," which presents a scalable approach based on Client-Server model to speed up the download process on behalf of a Web Search Engine in a distributed Domain-set specific environment. WEB-SAILOR removes the possibility of overlapping of downloaded documents by multiple crawlers without even incurring the cost of communication overhead among several parallel "client" crawling processes.

Mukhopadhyay, Debajyoti; Ghosh, Soumya; Kar, Saheli; Kim, Young-Chon

2011-01-01

76

Architecture for large-scale automatic web accessibility evaluation based on the UWEM methodology  

DEFF Research Database (Denmark)

The European Internet Accessibility project (EIAO) has developed an Observatory for performing large scale automatic web accessibility evaluations of public sector web sites in Europe. The architecture includes a distributed web crawler that crawls web sites for links until either a given budget of web pages have been identified or the web site has been crawled exhaustively. Subsequently, a uniform random subset of the crawled web pages is sampled and sent for accessibility evaluation and the evaluation results are stored in a Resource Description Format (RDF) database that is later loaded into the EIAO data warehouse using an Extract-Transform-Load (ETL) tool. The aggregated indicator results in the data warehouse are finally presented in a Plone based online reporting tool. This paper describes the final version of the EIAO architecture and outlines some of the technical and architectural challenges that the project faced and the solutions developed towards building a system capable of regular large-scale accessibility evaluations with sufficient capacity and stability. It also outlines some possible future architectural improvements.

Ulltveit-Moe, Nils; Olsen, Morten Goodwin

2008-01-01

77

Architecture and Methods for Innovative Heterogeneous Wireless Sensor Network Applications  

Directory of Open Access Journals (Sweden)

Full Text Available Nowadays wireless sensor netwoks (WSN) technology, wireless communications and digital electronics have made it realistic to produce a large scale miniaturized devices integrating sensing, processing and communication capabilities. The focus of this paper is to present an innovative mobile platform for heterogeneous sensor networks, combined with adaptive methods to optimize the communication architecture for novel potential applications in multimedia and entertainment. In fact, in the near future, some of the applications foreseen for WSNs will employ multi-platform systems with a high number of different devices, which may be completely different in nature, size, computational and energy capabilities, etc. Nowadays, in addition, data collection could be performed by UAV platforms which can be a sink for ground sensors layer, acting essentially as a mobile gateway. In order to maximize the system performances and the network lifespan, the authors propose a recently developed hybrid technique based on evolutionary algorithms. The goal of this procedure is to optimize the communication energy consumption in WSN by selecting the optimal multi-hop routing schemes, with a suitable hybridization of different routing criteria. The proposed approach can be potentially extended and applied to ongoing research projects focused on UAV-based sensing with WSN augmentation and real-time processing for immersive media experiences.

Pedro Antonio; Francesco Grimaccia; Marco Mussetta

2012-01-01

78

Views from the coalface: chemo-sensors, sensor networks and the semantic sensor web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Currently millions of sensors are being deployed in sensor networks across the world. These networks generate vast quantities of heterogeneous data across various levels of spatial and temporal granularity. Sensors range from single-point in situ sensors to remote satellite sensors which can cover ...

Hayes, Jer; O'Connor, Edel; Cleary, John; Kolar, Harry; McCarthy, Robert; Tynan, Richard; O'Hare, Gregory M.P.; Smeaton, Alan F.

79

Development of an Web Service Architecture for Enterprise Application Integration  

Energy Technology Data Exchange (ETDEWEB)

The purpose of Enterprise Application Integration (EAI) is to enable the interoperability between two or more enterprise software systems. These systems, for example, can be an Enterprise Resource Planning (ERP) system, an Enterprise Asset Management (EAM) system or a Condition Monitoring system. Traditional EAI approach, based on point-to-point connection, is expensive, vendor specific with limited modules and restricted interoperability with other ERPs and applications. To overcome these drawbacks, the Web Service based EAI has emerged. It allows the integration without point to point linking and with less costs. Many approaches of Web service based EAI are combined with ORACLE, SAP, PeopleSoft, WebSphere, SIEBEL etc. as a system integration platform. The approach still has the restriction that only predefined clients can access the services. This means clients must know exactly the protocol for calling the services and if they don't have the access information they never can get the services. This is because these Web services are based on syntactic service description. In this paper, a semantic based EAI approach, that allows the uninformed clients to access the services, is introduced. The semantic EAI is designed with the Web services that have semantic service descriptions. The Semantic Web Services(SWS) are described in Web Ontology Language for Services(OWL-S), a semantic service ontology language, and advertised in Universal Description, Discovery and Integration (UDDI). Clients find desired services through the UDDI and get services from service providers through Web Service Description Language(WSDL)

Kim, Ji-Hyeon; Jung, Jae-Cheon; Chang, Young-Woo; Chang, Hoon-Seon; Kim, Jae-Cheol; Kim, Hang-Bae [Korea Power Engineering Company, Daejeon (Korea, Republic of); Kim, Kyu-Ho; Lee, Dong-Chul [Korea Electric Power Data Network, Daejeon (Korea, Republic of)

2007-07-01

80

Development of an Web Service Architecture for Enterprise Application Integration  

International Nuclear Information System (INIS)

[en] The purpose of Enterprise Application Integration (EAI) is to enable the interoperability between two or more enterprise software systems. These systems, for example, can be an Enterprise Resource Planning (ERP) system, an Enterprise Asset Management (EAM) system or a Condition Monitoring system. Traditional EAI approach, based on point-to-point connection, is expensive, vendor specific with limited modules and restricted interoperability with other ERPs and applications. To overcome these drawbacks, the Web Service based EAI has emerged. It allows the integration without point to point linking and with less costs. Many approaches of Web service based EAI are combined with ORACLE, SAP, PeopleSoft, WebSphere, SIEBEL etc. as a system integration platform. The approach still has the restriction that only predefined clients can access the services. This means clients must know exactly the protocol for calling the services and if they don't have the access information they never can get the services. This is because these Web services are based on syntactic service description. In this paper, a semantic based EAI approach, that allows the uninformed clients to access the services, is introduced. The semantic EAI is designed with the Web services that have semantic service descriptions. The Semantic Web Services(SWS) are described in Web Ontology Language for Services(OWL-S), a semantic service ontology language, and advertised in Universal Description, Discovery and Integration (UDDI). Clients find desired services through the UDDI and get services from service providers through Web Service Description Language(WSDL)

2007-01-01

 
 
 
 
81

Incorporating Quality Control Information in the Sensor Web  

Science.gov (United States)

The rapid development of sensing technologies had led to the creation of large amounts of heterogeneous environmental observations. The Sensor Web provides a wider access to sensors and observations via common protocols and specifications. Observations typically go through several levels of quality control, and aggregation before they are made available to end-users. Raw data are usually inspected, and related quality flags are assigned. Data are gap-filled, and errors are removed. New data series may also be derived from one or more corrected data sets. Until now, it is unclear how these kinds of information can be captured in the Sensor Web Enablement (SWE) framework. Apart from the quality measures (e.g., accuracy, precision, tolerance, or confidence), the levels of observational series, the changes applied, and the methods involved must be specified. It is important that this kind of quality control information is well described and communicated to end-users to allow for a better usage and interpretation of data products. In this paper, we describe how quality control information can be incorporated into the SWE framework. Concerning this, first, we introduce the TERENO (TERrestrial ENvironmental Observatories), an initiative funded by the large research infrastructure program of the Helmholtz Association in Germany. The main goal of the initiative is to facilitate the study of long-term effects of climate and land use changes. The TERENO Online Data RepOsitORry (TEODOOR) is a software infrastructure that supports acquisition, provision, and management of observations within TERENO via SWE specifications and several other OGC web services. Next, we specify changes made to the existing observational data model to incorporate quality control information. Here, we describe the underlying TERENO data policy in terms of provision and maintenance issues. We present data levels, and their implementation within TEODOOR. The data levels are adapted from those used by other similar systems such as CUAHSI, EarthScope and WMO. Finally, we outline recommendations for future work.

Devaraju, Anusuriya; Kunkel, Ralf; Bogena, Heye

2013-04-01

82

A Web-enabled Architecture of Workflow Management System for Heterogeneous Environment  

Directory of Open Access Journals (Sweden)

Full Text Available In this study architectural framework of workflow management system for heterogeneous and distributed environment has been proposed which incorporates web-enabled independent interface for clients to execute workflows. Some of the drawbacks and limitations of the traditional approaches are discussed; then architecture of flexible and platform independent simple workflow management system has been presented which is based on Java and internet technologies. Workflow engine and clients are implemented in Java. Workflow models are stored in relational database and the workflow engine accesses these models using JDBC interface. Standard browsers are used as web based clients to access the workflow system via HTTP protocol.

Khurram Shahzad; Khalid Rashid

2005-01-01

83

Implementing wireless sensor networks for architectural heritage conservation  

Science.gov (United States)

Preventive conservation in architectural heritage is one of the most important aims for the development and implementation of new techniques to assess decay, lending to reduce damage before it has occurred and reducing costs in the long term. For that purpose, it is necessary to know all aspects influencing in decay evolution depending on the material under study and its internal and external conditions. Wireless sensor networks are an emerging technology and a minimally invasive technique. The use of these networks facilitates data acquisition and monitoring of a large number of variables that could provoke material damages, such as presence of harmful compounds like salts, dampness, etc. The current project presents different wireless sensors networks (WSN) and sensors used to fulfill the requirements for a complete analysis of main decay agents in a Renaissance church of the 16th century in Madrid (Spain). Current typologies and wireless technologies are studied establishing the most suitable system and the convenience of each one. Firstly, it is very important to consider that microclimate is in close correlation with material deterioration. Therefore a temperature(T) and relative humidity (RH)/moisture network has been developed, using ZigBee wireless communications protocols, and monitoring different points along the church surface. These points are recording RH/T differences depending on the height and the sensor location (inside the material or on the surface). On the other hand, T/RH button sensors have been used, minimizing aesthetical interferences, and concluding which is the most advisable way for monitoring these specific parameters. Due to the fact that microclimate is a complex phenomenon, it is necessary to examine spatial distribution and time evolution at the same time. This work shows both studies since the development expects a long term monitoring. A different wireless network has been deployed to study the effects of pollution caused by other active systems such as a forced-air heating system, the parishioners presence or feasts and other ventilation conditions. Finally weather conditions are registered through a weather station. Outside and inside conditions are compared to incorporate data to the network for a later decay modeling.

Martínez-Garrido, M. I.; Aparicio, S.; Fort, R.; Izquierdo, M. A. G.; Anaya, J. J.

2012-04-01

84

Architectural patterns regarding web application domain usability/ Patrones arquitectónicos sobre usabilidad en el dominio de las aplicaciones web  

Scientific Electronic Library Online (English)

Full Text Available Abstract in spanish En el contexto de las aplicaciones web, la usabilidad es una de las características de calidad con gran impacto en la aceptación por parte del usuario final. Sin embargo, la relación entre la usabilidad y la arquitectura del software no ha sido totalmente identificada y caracterizada. Algunos trabajos han encontrado algunas relaciones de la usabilidad con la arquitectura pero no con patrones arquitectónicos. La principal contribución de este artículo es la identific (more) ación de los patrones arquitectónicos y en qué medida éstos impactan en las propiedades de usabilidad en el contexto de las aplicaciones web. Este estudio tiene dos utilidades principales: la primera, para los arquitectos y diseñadores de nuevos productos, en la identificación temprana (a nivel de arquitectura) de posibles problemas o ventajas al usar algunos de ellos en una aplicación web; además, los arquitectos podrían identificar debilidades en el diseño inicial, incrementando la satisfacción del usuario final. Y la segunda, cuando una aplicación web está sido evaluada desde el punto de vista de la usabilidad, la detección de posibles problemas o debilidades implica que ésta deba ser mejorada, lo que conlleva a realizar cambios en la aplicación, en las interfaces y a nivel de su arquitectura, en este caso, los patrones permiten relacionar el problema y sugerir la solución más adecuada. El impacto de los patrones arquitectónicos estudiados en este trabajo han sido validados con dos pequeñas y medianas empresas (PyMes) colombianas, las cuales han ejercitado algunos de los patrones propuestos verificando su influencia en las propiedades de la usabilidad. Abstract in english Usability is one of the quality characteristics having the greatest impact on final user acceptation in a web application context. However, the relationship between usability and software architecture has not been completely identified and characterised. Some work has found some relationships between usability and architecture but not between architectural patterns. This paper´s main contribution lies in its identification of architecture patterns and how they have influ (more) enced usability within the context of web applications. This study is useful for architects and new product designers regarding the early identification of possible problems and/or advantages (at architectural level), using some of them in a web application. Additionally, architects could identify weaknesses in initial designs thereby increasing final user satisfaction. The study could be useful when a web application is being evaluated, since detecting possible usability problems or weaknesses implies that it should be improved. Consequently, some changes would be made to the application, both in its interfaces and at architectural level. In this case, the problem can be related and the most suitable solution be suggested in terms of patterns. The impact of this work´s architectural pattern has been validated on two Colombian small- and medium-sized enterprises which have exercised some of the proposed patterns and verified their influence on usability properties.

Arciniegas Herrera, José Luis; Fernández de Valdenebro, María Verónica; Hormiga Juspian, María Amparo; Tulande Arroyo, Aleyda; Collazos Ordoñez, Cesar Alberto

2010-04-01

85

Patrones arquitectónicos sobre usabilidad en el dominio de las aplicaciones web Architectural patterns regarding web application domain usability  

Directory of Open Access Journals (Sweden)

Full Text Available En el contexto de las aplicaciones web, la usabilidad es una de las características de calidad con gran impacto en la aceptación por parte del usuario final. Sin embargo, la relación entre la usabilidad y la arquitectura del software no ha sido totalmente iden- tificada y caracterizada. Algunos trabajos han encontrado algunas relaciones de la usabilidad con la arquitectura pero no con patrones arquitectónicos. La principal contribución de este artículo es la identificación de los patrones arquitectónicos y en qué medida éstos impactan en las propiedades de usabilidad en el contexto de las aplicaciones web. Este estudio tiene dos utilida- des principales: la primera, para los arquitectos y diseñadores de nuevos productos, en la identificación temprana (a nivel de ar- quitectura) de posibles problemas o ventajas al usar algunos de ellos en una aplicación web; además, los arquitectos podrían i- dentificar debilidades en el diseño inicial, incrementando la satisfacción del usuario final. Y la segunda, cuando una aplicación web está sido evaluada desde el punto de vista de la usabilidad, la detección de posibles problemas o debilidades implica que ésta deba ser mejorada, lo que conlleva a realizar cambios en la aplicación, en las interfaces y a nivel de su arquitectura, en es- te caso, los patrones permiten relacionar el problema y sugerir la solución más adecuada. El impacto de los patrones arquitec- tónicos estudiados en este trabajo han sido validados con dos pequeñas y medianas empresas (PyMes) colombianas, las cuales han ejercitado algunos de los patrones propuestos verificando su influencia en las propiedades de la usabilidad.Usability is one of the quality characteristics having the greatest impact on final user acceptation in a web application context. However, the relationship between usability and software architecture has not been completely identified and characterised. Some work has found some relationships between usability and architecture but not between architectural patterns. This paper’s main contribution lies in its identification of architecture patterns and how they have influenced usability within the context of web applications. This study is useful for architects and new product designers regarding the early identification of possible problems and/or advantages (at architectural level), using some of them in a web application. Additionally, architects could identify weak- nesses in initial designs thereby increasing final user satisfaction. The study could be useful when a web application is being eva- luated, since detecting possible usability problems or weaknesses implies that it should be improved. Consequently, some chan- ges would be made to the application, both in its interfaces and at architectural level. In this case, the problem can be related and the most suitable solution be suggested in terms of patterns. The impact of this work’s architectural pattern has been vali- dated on two Colombian small- and medium-sized enterprises which have exercised some of the proposed patterns and verified their influence on usability properties.

Arciniegas Herrera José Luis; Fernández de Valdenebro María Verónica; Hormiga Juspian María Amparo; Tulande Arroyo Aleyda; Collazos Ordóñez César Alberto

2010-01-01

86

A Proposed Architecture for Continuous Web Monitoring Through Online Crawling of Blogs  

Directory of Open Access Journals (Sweden)

Full Text Available Getting informed of what is registered in the Web space on time, can greatly help the psychologists, marketers and political analysts to familiarize, analyse, make decision and act correctly based on thesociety`s different needs. The great volume of information in the Web space hinders us to continuouslyonline investigate the whole space of the Web. Focusing on the considered blogs limits our working domain and makes the online crawling in the Web space possible. In this article, an architecture is offered which continuously online crawls the related blogs, using focused crawler, and investigates and analyses theobtained data. The online fetching is done based on the latest announcements of the ping server machines. A weighted graph is formed based on targeting the important key phrases, so that a focused crawler can do the fetching of the complete texts of the related Web pages, based on the weighted graph.

Mehdi Naghavi; Mohsen Sharifi

2012-01-01

87

Web Based System Architecture for Long Pulse Remote Experimentation  

International Nuclear Information System (INIS)

[en] Remote experimentation methods will be essential in next generation fusion devices. Requirements for long pulse operation will be the real-time visualization of data, the real-time monitoring of data acquisition processes and the real-time interaction with data acquisition systems (start, stop or set-up modifications). INDRA Sistemas S.A., CIEMAT and UPM (polytechnic university of Madrid) have designed a specific software architecture for these purposes. The architecture is based on the BeansNet platform, whose integration with an application server provides a proper solution to the requirements. BeansNet is a JINI based framework developed by INDRA, which makes easy the implementation of a remote participation model based on a Service Oriented Architecture. BeansNet and its interaction with the Messaging Services provides the users with the information acquired by real time acquisition systems, with no further delay than the derived from the information transmission over the network, depending on its bandwidth. The new software architecture has been designed based on the existing experience with the TJ-II remote experimentation system. In that case, different aspects of remote participation in experiments from distributed environments were addressed, as remote configuration of data acquisition systems or user authentication. The new design allows the required real-time interactions within a secure environment and with an easy system administration. (authors)

2009-01-01

88

Web based system architecture for long pulse remote experimentation  

International Nuclear Information System (INIS)

[en] Remote experimentation (RE) methods will be essential in next generation fusion devices. Requirements for long pulse RE will be: on-line data visualization, on-line data acquisition processes monitoring and on-line data acquisition systems interactions (start, stop or set-up modifications). Note that these methods are not oriented to real-time control of fusion plant devices. INDRA Sistemas S.A., CIEMAT (Centro de Investigaciones Energeticas Medioambientales y Tecnologicas) and UPM (Universidad Politecnica de Madrid) have designed a specific software architecture for these purposes. The architecture can be supported on the BeansNet platform, whose integration with an application server provides an adequate solution to the requirements. BeansNet is a JINI based framework developed by INDRA, which makes easy the implementation of a remote experimentation model based on a Service Oriented Architecture. The new software architecture has been designed on the basis of the experience acquired in the development of an upgrade of the TJ-II remote experimentation system.

2010-01-01

89

The ICAAP Project, Part Two: The Web Architecture.  

Science.gov (United States)

Discusses the Inter-CIC Authentication and Authorization Project (ICAAP) of the Big Ten Joint Project (BTJP), a technical group who suggests uses of technology that address business issues commonly shared by Big Ten universities. Describes pilot project goals; the technical, operational, and contractual situation; the World Wide Web transaction…

Riddle, Bob

1997-01-01

90

An Architecture to Implement Event-Driven Web Monitoring Systems  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Traditional monitoring systems are based on C/S mode because desktop software still has inherent advantages though desktop software is replaced by web applications rapidly in many fields. Meanwhile, traditional monitoring systems use relational database as data source, however, relational database l...

Gao Ying; Mu Lei; Hao Zhonghu; Zheng Weiyang

91

Architectural Design Issues For Web-Based Virtual Reality Training Systems  

UK PubMed Central (United Kingdom)

This paper presents a surgical trainingsystem which utilises both virtual reality technology and the advantage of world wide accessibility offered by the web. Therequirements of such a system are presented and an architectural design to achieve these requirements is proposed.1. INTRODUCTION

Nuha H. El-khalili; Ken W. Brodlie

92

'Follow me': a web-based, location-sharing architecture for large, indoor environments  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We leverage the ubiquity of bluetooth-enabled devices and propose a decentralized, web-based architecture that allows users to share their location by following each other in the style of Twitter. We demonstrate a prototype that operates in a large building which generates a dataset of detected blue...

Ypodimatopoulos, Polychronis; Lippman, Andrew B.

93

The Design of an IVDS World Wide Web Browser Architecture  

UK PubMed Central (United Kingdom)

An IVDS (Interactive Video Data Service) uses an interactive television system totransmit data to and from subscribers' homes. IVDS allows the viewer to interact withcontent provided on the television using a remote control. A typical IVDS applicationwould be ordering an advertised product or playing along with a quiz show.The Virginia Tech Center for Wireless Telecommunications (CWT), under acontract with Interactive Return Service, Inc., is developing an IVDS system in whichcontent is provided through the television cable system in the form of audio codes. Aspecial remote control can detected these audio codes and query the user for input. Thereturn path for this system is a wireless channel. The remote control contains a spreadspectrum transmitter that transmits packets to a Repeater unit residing within a quartermile of the user's home.With the popularity of the World Wide Web soaring, many companies areannouncing internet appliances that will bring the content of the web to the user at afraction of the cost of a standard personal computer. CWT has been contracted to extendthe core IVDS system to provide a web browsing capability, allowing the user to browsethe web with only the remote control.This thesis outlines the requirements of the IVDS Web Browser System. Thedifferent hardware design concepts are documented. The final Browser Systemspecification is presented, as well as a board-level description of the Decoder Unit that ispart of this final Browser System. Finally, a detailed description, current status, andsimulation results are presented for the FPGA (Field Programmable Gate Array) thatserves as the controller for the Decoder Unit.iAcknowledgmentsI would like to thank my Dr. Nathaniel Davis, my advisor, for his guidance throughou...

Scott F. Midkiff; Willard W. Farley; Aaron George Hawes

94

An Efficient PKC-Based Security Architecture for Wireless Sensor Networks  

CERN Document Server

In spite of previous widely held belief of the incompatibility of public key cryptography (PKC) schemes for wireless sensor networks (WSNs), some recent works have shown that, PKC based schemes could be implemented for such networks in some ways. The major challenge of employing a PKC scheme in wireless sensor network is posed by the limitations of resources of the tiny sensors. Considering this feature of the sensors, in this paper, we propose an efficient PKC based security architecture with relatively less resource requirements than those of the other previously proposed PKC schemes for WSN. Our security architecture comprises basically of two parts; a key handshaking scheme based on simple linear operations and the derivation of decryption key by a receiver node. Our architecture allows both base-station-to-node or node-to-base-station secure communications, and node-to-node secure communications. Analysis and simulation results show that, our proposed architecture ensures a good level of security for com...

Haque, Md Mokammel; Choi, Byung Goo; Hong, Choong Seon

2007-01-01

95

From Sensor to Observation Web with environmental enablers in the Future Internet.  

UK PubMed Central (United Kingdom)

This paper outlines the grand challenges in global sustainability research and the objectives of the FP7 Future Internet PPP program within the Digital Agenda for Europe. Large user communities are generating significant amounts of valuable environmental observations at local and regional scales using the devices and services of the Future Internet. These communities' environmental observations represent a wealth of information which is currently hardly used or used only in isolation and therefore in need of integration with other information sources. Indeed, this very integration will lead to a paradigm shift from a mere Sensor Web to an Observation Web with semantically enriched content emanating from sensors, environmental simulations and citizens. The paper also describes the research challenges to realize the Observation Web and the associated environmental enablers for the Future Internet. Such an environmental enabler could for instance be an electronic sensing device, a web-service application, or even a social networking group affording or facilitating the capability of the Future Internet applications to consume, produce, and use environmental observations in cross-domain applications. The term "envirofied" Future Internet is coined to describe this overall target that forms a cornerstone of work in the Environmental Usage Area within the Future Internet PPP program. Relevant trends described in the paper are the usage of ubiquitous sensors (anywhere), the provision and generation of information by citizens, and the convergence of real and virtual realities to convey understanding of environmental observations. The paper addresses the technical challenges in the Environmental Usage Area and the need for designing multi-style service oriented architecture. Key topics are the mapping of requirements to capabilities, providing scalability and robustness with implementing context aware information retrieval. Another essential research topic is handling data fusion and model based computation, and the related propagation of information uncertainty. Approaches to security, standardization and harmonization, all essential for sustainable solutions, are summarized from the perspective of the Environmental Usage Area. The paper concludes with an overview of emerging, high impact applications in the environmental areas concerning land ecosystems (biodiversity), air quality (atmospheric conditions) and water ecosystems (marine asset management).

Havlik D; Schade S; Sabeur ZA; Mazzetti P; Watson K; Berre AJ; Mon JL

2011-01-01

96

WebML and .NET Architecture for Developing Students Appointment Management System  

Directory of Open Access Journals (Sweden)

Full Text Available This study presents the application of Web Modeling Language (WebML) in a Student Appointment Management System (SAMS) to help students and lecturers arrange meetings in an effective and efficient way in a university or college environment. WebML is well designed for web applications and .NET four-tier architecture offers maximum functionality and flexibility in a heterogeneous, web based environment. Each WebML elements is transformed accordingly to Hypertext model as known as site views of SAMS is believed to work best in implementing an appointment management system and turning the traditional management approach into current web technology. Comparisons with existing similar systems are presented based on three typical quality attribute requirements for web applications: usability, performance and maintainability. The usability of SAMS is measured by applying the Goal-Question-Metrics (GQM) approach in questionnaires to collect users’ opinions on the system, especially the interface, while the maintainability of this system is measured using the cyclomatic complexity technique. From the survey it is proven that SAMS fulfils the usability requirements as the results show that 67% of lecturers and 75% of students were satisfied with the overall system.

M.H.N.M. Nasir; S.H. Hamid; H. Hassan

2009-01-01

97

Evolving the Web-Based Distributed SI/PDO Architecture for High-Performance Visualization  

Energy Technology Data Exchange (ETDEWEB)

The Simulation Intranet/Product Database Operator (SI/PDO) project has developed a Web-based distributed object architecture for high performance scientific simulation. A Web-based Java interface guides designers through the design and analysis cycle via solid and analytical modeling, meshing, finite element simulation, and various forms of visualization. The SI/PDO architecture has evolved in steps towards satisfying Sandia's long-term goal of providing an end-to-end set of services for high fidelity full physics simulations in a high-performance, distributed, and distance computing environment. This paper describes the continuing evolution of the architecture to provide high-performance visualization services. Extensions to the SI/PDO architecture allow web access to visualization tools that run on MP systems. This architecture makes these tools more easily accessible by providing web-based interfaces and by shielding the user from the details of these computing environments. The design is a multi-tier architecture, where the Java-based GUI tier runs on a web browser and provides image display and control functions. The computation tier runs on MP machines. The middle tiers provide custom communication with MP machines, remote file selection, remote launching of services, load balancing, and machine selection. The architecture allows middleware of various types (CORBA, COM, RMI, sockets, etc.) to connect the tiers depending upon the situation. Testing of constantly developing visualization tools can be done in an environment where there are only two tiers which both run on desktop machines. This allows fast testing turnaround and does not use compute cycles on high-performance machines. Once the code and interfaces are tested, they are moved to high-performance machines, and new tiers are added to handle the problems of using these machines. Uniform interfaces are used throughout the tiers to allow this flexibility. Experiments test the appropriate level of interface: either a large set of specific function calls or a small set of generic function calls. This architecture is based on the goals and constraints of the environment: huge data volumes (that cannot be easily moved), use of multiple middleware protocols, MP platform portability, rapid development of the visualization tools, distributed resource management (of MP resources), and the use of existing visualization tools.

HOLMES,VICTOR P.; LINEBARGER,JOHN M.; MILLER,DAVID J.; VANDEWART,RUTHE LYNN; CROWLEY,CHARLES P.

2000-08-16

98

Using a Web Services Architecture with Me, Myself and I  

Directory of Open Access Journals (Sweden)

Full Text Available The UW-Madison Libraries Library Course Page system is used to deliver electronic reserves materials and course-focused library instruction webpages to students. As part of a rewrite of our system we broke the application into three component pieces: a file repository, a course timetable data service, and an interface application for building and viewing individual course pages. The new three-piece system was written with an inward facing service-oriented architecture that allowed us to choose the best technologies to solve each of the tasks the entire system needs to accomplish.

Stephen Meyer

2009-01-01

99

A Real-Time-Enabled, Blackboard-Based, Publish/Subscribe Architecture for Wireless Sensor Nodes  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless sensor network nodes have only limited resources concerning memory and battery life-time. Mem- ory can be efficiently used by sharing data, and the life-time of a battery can be extended, when the node has long power saving sleep-phases. We propose a publish/subscribe architecture that achieves these two aims. The results of our work are of great interest for sensor application developers, giving them now the opportu- nity to use our architecture for sharing data among different applications on the node as well as the different layers of the operating system. We introduce a blackboard which is used for centrally storing published val- ues, like measured data from a monitored sensor. This makes it possible to share stored data without monitoring the sensors once again, which is advantageously concerning power consumption, memory space, and reaction time. Beside the proposed publish/subscribe method for sensor nodes with its notification possibili- ties, our architecture fulfills also real-time requirements. We show how the well-known sensor operating system MANTIS OS can be extended by a real-time enabled, blackboard-based publish/subscribe architect- ture. This architecture and first of all its implementation is of special interest for cross layer optimization of sensor applications. Cross-layer approaches benefit from our architecture because the available implementa- tion can be used as an efficient framework for central storing and managing of shared values.

Bjorn Stelte

2010-01-01

100

Hyper-ITS: A Web-Based Architecture for Evolving and Configurable Learning Environment  

UK PubMed Central (United Kingdom)

: The World Wide Web facilitates co-operative teaching and learning, offering anexciting potential for sharing both the learning resources as well as the tasks ofcreating new learning resources through international collaboration. The mainstayof the web so far, the Hyper-text and Hyper-media offer a link based flexiblearchitecture where addition, amendment and removal of material is relativelyeasy. This allows incremental construction and upgrading of web based systems tofacilitate division of large tasks, easier prototyping and the ability to selectivelyupdate various learning resources to keep them current as well as to takeadvantage of improving technologies.This paper proposes a web based architecture for intelligent tutoring systems thatextends similar benefits to designing interactive learning, particularly withreference to Cognitive Apprenticeship Based Learning Environments (CABLE).Since the acquisition of cognitive skills is critical for learning any applieddisci...

Ashok Patel; David Russell

 
 
 
 
101

A Dynamic Architecture for Reconfiguration of Web Servers Clusters  

Directory of Open Access Journals (Sweden)

Full Text Available The allocation planning of resources in a web server cluster is accomplished nowadays by the administrator. Once the internet is quite dynamic, as far as the use of resources is concerned, such a task may be considered critical and inefficient if accomplished manually. Our approach benefits from the use of agents to learn from the environment and adjust automatically the behavior of the system to make a better use of the available resources. With this approach it is possible to help the administrator by minimizing your stress in moments of work overload. The conception, specification, adopted allocation planning strategy, modeling in Petri nets, implementation of this platform in the Java language are presented. Experimentations and simulations which prove the efficiency of the proposal are presented.

Carla Marques; Isabel Oliveira; Giovanni Barroso; Antonio Serra

2011-01-01

102

Design and implementation of web-based discharge summary note based on service-oriented architecture.  

UK PubMed Central (United Kingdom)

Discharge summary note is one of the essential clinical data in medical records, and it concisely capsules a patient's status during hospitalization. In the article, we adopt web-based architecture in developing a new discharge summary system for the Healthcare Information System of National Taiwan University Hospital, to improve the traditional client/sever architecture. The article elaborates the design approaches and implementation illustrations in detail, including patients' summary query and searching, model and phrase quoted, summary check list, major editing blocks as well as other functionalities. The system has been on-line and achieves successfully since October 2009.

Chen CH; Hsieh SH; Su YS; Hsu KP; Lee HH; Lai F

2012-02-01

103

Reliable Fiber Sensor System with Star-Ring-Bus Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available This work presents a novel star-ring-bus sensor system and demonstrates its effectiveness. The main trunk of the proposed sensor system is a star topology and the sensing branches comprise a series of bus subnets. Any weakness in the reliability of the sensor system is overcome by adding remote nodes and switches to the ring and bus subnets. To construct the proposed star-ring-bus sensor system, a fiber ring laser scheme is used to improve the signal-to-noise ratio of the sensor system. The proposed system increases the reliability and capacity of fiber sensor systems.

Peng-Chun Peng; Jun-Bo Wang; Kuan-Yan Huang

2010-01-01

104

Arquitectura de sistemas tecnológicos para la educación basada en Web/ Technology System Architecture for Web-Based Education  

Scientific Electronic Library Online (English)

Full Text Available Abstract in spanish En este trabajo se presenta una nueva arquitectura para el desarrollo de sistemas de Educación Basada en Web. Estos sistemas se centran en el estudiante y se adaptan a sus necesidades personales de forma inteligente. La arquitectura se basa en la especificación IEEE 1484 LTSA (Learning Technology System Architecture) y reúne a los modelos de desarrollo de software y diseño instruccional. Por una parte, el modelo de desarrollo de software se encuentra sustentado bajo u (more) n Sistema Multi-Agentes (MAS), emplea los métodos y técnicas de la Ingeniería de Dominio para el desarrollo de CARIOO (Componentes de Aprendizaje Reutilizables e Inteligentes Orientados a Objetos). Los CARIOO son un tipo especial de Objetos de Contenido Compartible de acuerdo a SCORM (Sharable Content Object Reusable Model). Por otra, el modelo de diseño instruccional incorpora un modelo mental como los Mapas Conceptuales (MC) para transmitir, construir y generar conocimientos adecuados a este tipo de ambiente. Abstract in english In this paper a new architecture for development of Web-Based Education systems is presented. The se systems are centered in the learner and adapted to their personals needs in intelligent form. The architecture is based on the IEEE 1484 LTSA (Learning Technology System Architecture) specification and it assembles to software development and instructional design patterns. On the one hand, the software development pattern is supported under a Multi-Agents System, it employ (more) s the methods and technical of the Domain Engineering for development of IRLCOO (Intelligent Reusable Learning Components Object Oriented). IRLCOO are a special type of Sharable Content Object according to SCORM (Sharable Content Object Reusable Model). On the other hand, the instructional design pattern incorporates a mental model as the Conceptual Maps to transmit, build and generate appropriate knowledge to this educational environment type.

Canales-Cruz, A; Peredo-Valderrama, R; Balladares-Ocaña, L; Peredo-Valderrama, I; Sossa-Azuela, J.H.

2009-06-01

105

Energy-Aware Fragmented Memory Architecture with a Switching Power Supply for Sensor Nodes  

Directory of Open Access Journals (Sweden)

Full Text Available The basic sensor node architecture in a wireless sensor network contains sensing, transceiver, processing and memory units along with the power supply module. Because the basic sensor network application nature is surveillance, these networks may be deployed in a remote environment without human intervention. The sensor nodes are also battery-powered tiny devices with limited memory capacity. Because of these sensor node limitations, the architecture can be modified to efficiently utilise energy during memory accesses by dividing the memory into multiple banks and including a memory switching controller unit and a power switching module. This modification conserves energy, so power can be supplied only to the bank or part of the memory being accessed instead of powering the entire memory module, thus leading to efficient energy consumption. Simulations have been performed on fragmented memory architecture by incorporating the M/M/1 queuing model. When the packets get queued up, energy utilisation and a packet drop at the sensor node is observed. The energy consumption is reduced by an average of 70%, and there is significantly less packet drop compared to the normal memory architecture. This leads to increase in node and network lifetime and prevents information loss

Harish H Kenchannavar; M.M.Math; Umakant P.Kulkarni

2013-01-01

106

Optimized Autonomous Space In-situ Sensor-Web for volcano monitoring  

Science.gov (United States)

In response to NASA's announced requirement for Earth hazard monitoring sensor-web technology, a multidisciplinary team involving sensor-network experts (Washington State University), space scientists (JPL), and Earth scientists (USGS Cascade Volcano Observatory (CVO)), is developing a prototype dynamic and scaleable hazard monitoring sensor-web and applying it to volcano monitoring. The combined Optimized Autonomous Space -In-situ Sensor-web (OASIS) will have two-way communication capability between ground and space assets, use both space and ground data for optimal allocation of limited power and bandwidth resources on the ground, and use smart management of competing demands for limited space assets. It will also enable scalability and seamless infusion of future space and in-situ assets into the sensor-web. The prototype will be focused on volcano hazard monitoring at Mount St. Helens, which has been active since October 2004. The system is designed to be flexible and easily configurable for many other applications as well. The primary goals of the project are: 1) integrating complementary space (i.e., Earth Observing One (EO-1) satellite) and in-situ (ground-based) elements into an interactive, autonomous sensor-web; 2) advancing sensor-web power and communication resource management technology; and 3) enabling scalability for seamless infusion of future space and in-situ assets into the sensor-web. To meet these goals, we are developing: 1) a test-bed in-situ array with smart sensor nodes capable of making autonomous data acquisition decisions; 2) efficient self-organization algorithm of sensor-web topology to support efficient data communication and command control; 3) smart bandwidth allocation algorithms in which sensor nodes autonomously determine packet priorities based on mission needs and local bandwidth information in real-time; and 4) remote network management and reprogramming tools. The space and in-situ control components of the system will be integrated such that each element is capable of autonomously tasking the other. Sensor-web data acquisition and dissemination will be accomplished through the use of the Open Geospatial Consortium Sensorweb Enablement protocols. The three-year project will demonstrate end-to-end system performance with the in-situ test-bed at Mount St. Helens and NASA's EO-1 platform. ??2008 IEEE.

Song, W. Z.; Shirazi, B.; Kedar, S.; Chien, S.; Webb, F.; Tran, D.; Davis, A.; Pieri, D.; LaHusen, R.; Pallister, J.; Dzurisin, D.; Moran, S.; Lisowski, M.

2008-01-01

107

Analysis of the Architecture of VoIP and SIP to design a secured browser based web phone  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Mahmood, Syed 2011. Research on analysis of the architecture of VoIP and SIP to design a secured browser based web phone. Kemi-Tornio University of Applied Sciences. Business and Culture. 2 Appendices. Pages 59. The objectives of the research were to analyze fundamental architecture of Voice over I...

Mahmood, Syed

108

Design and Implementation of an Architectural Framework for Web Portals in a Ubiquitous Pervasive Environment  

Directory of Open Access Journals (Sweden)

Full Text Available Web Portals function as a single point of access to information on the World Wide Web (WWW). The web portal always contacts the portal’s gateway for the information flow that causes network traffic over the Internet. Moreover, it provides real time/dynamic access to the stored information, but not access to the real time information. This inherent functionality of web portals limits their role for resource constrained digital devices in the Ubiquitous era (U-era). This paper presents a framework for the web portal in the U-era. We have introduced the concept of Local Regions in the proposed framework, so that the local queries could be solved locally rather than having to route them over the Internet. Moreover, our framework enables one-to-one device communication for real time information flow. To provide an in-depth analysis, firstly, we provide an analytical model for query processing at the servers for our framework-oriented web portal. At the end, we have deployed a testbed, as one of the world’s largest IP based wireless sensor networks testbed, and real time measurements are observed that prove the efficacy and workability of the proposed framework.

Muhammad Taqi Raza; Seung-Wha Yoo; Ki-Hyung Kim; Seong-Soon Joo; Wun-Cheol Jeong

2009-01-01

109

Future Unified Communication Based on Ubiquitous Hierarchical Generalized-Sensor Network Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Recent advances in wireless sensor network (WSN) and radio frequency identifier (RFID) have made it possible to extend current human-to-human communication to the future unified communication environment among human society, computer network and the external physical world. A ubiquitous hierarchical generalized-sensor network (UHGSN) is presented in this paper as a typical network model for such unified communication architecture. The sensor information processing unit and the hierarchical distributed agent server are introduced as the basic network elements in this architecture for effective information communication, and the topology, addressing and recovery problems are analyzed. As the basic applications, the combined “key word” based characterized searching mechanism and the performance monitoring processes are discussed, along with the corresponding protocol message definition and encoding format. Simulation results show the advancements of the presented hierarchical architecture and the job-list based characterized searching mechanism.

Zhitong Huang; Yuefeng Ji

2012-01-01

110

A Planar Group-Based Architecture to Scale Ad-Hoc and Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available It is known that grouping nodes gives better performance to the group and to the whole system, thereby avoiding unnecessary message forwarding and additional overheads while allows to scale the network considerably. Many routing protocols for ad-hoc networks and sensor networks have been designed, but none of them is based on groups. In this paper, after a review of group based architectures and of neighbor selection strategies, a planar group-based network architecture is proposed. In the proposal, the network is formed by several groups of ad-hoc devices or sensors. Connections between groups are established as a function of the proximity and the neighbor's available capacity (based on the ad-hoc device or sensor’s energy). The messages that are needed to the proper operation are shown. It is also simulated how much time is needed to propagate information between groups and it is calculated the diameter for different topologies

Jaime Lloret; Miguel Garcia; Fernando Boronat; Jesus Tomás

2009-01-01

111

An architecture for diversity-aware search for medical web content.  

UK PubMed Central (United Kingdom)

OBJECTIVES: The Web provides a huge source of information, also on medical and health-related issues. In particular the content of medical social media data can be diverse due to the background of an author, the source or the topic. Diversity in this context means that a document covers different aspects of a topic or a topic is described in different ways. In this paper, we introduce an approach that allows to consider the diverse aspects of a search query when providing retrieval results to a user. METHODS: We introduce a system architecture for a diversity-aware search engine that allows retrieving medical information from the web. The diversity of retrieval results is assessed by calculating diversity measures that rely upon semantic information derived from a mapping to concepts of a medical terminology. Considering these measures, the result set is diversified by ranking more diverse texts higher. RESULTS: The methods and system architecture are implemented in a retrieval engine for medical web content. The diversity measures reflect the diversity of aspects considered in a text and its type of information content. They are used for result presentation, filtering and ranking. In a user evaluation we assess the user satisfaction with an ordering of retrieval results that considers the diversity measures. CONCLUSIONS: It is shown through the evaluation that diversity-aware retrieval considering diversity measures in ranking could increase the user satisfaction with retrieval results.

Denecke K

2012-12-01

112

STOMP: A Software Architecture for the Design and Simulation UAV-Based Sensor Networks  

Energy Technology Data Exchange (ETDEWEB)

This paper presents the Simulation, Tactical Operations and Mission Planning (STOMP) software architecture and framework for simulating, controlling and communicating with unmanned air vehicles (UAVs) servicing large distributed sensor networks. STOMP provides hardware-in-the-loop capability enabling real UAVs and sensors to feedback state information, route data and receive command and control requests while interacting with other real or virtual objects thereby enhancing support for simulation of dynamic and complex events.

Jones, E D; Roberts, R S; Hsia, T C S

2002-10-28

113

An efficient architecture for the integration of sensor and actuator networks into the future internet  

Science.gov (United States)

In the future, sensors will enable a large variety of new services in different domains. Important application areas are service adaptations in fixed and mobile environments, ambient assisted living, home automation, traffic management, as well as management of smart grids. All these applications will share a common property, the usage of networked sensors and actuators. To ensure an efficient deployment of such sensor-actuator networks, concepts and frameworks for managing and distributing sensor data as well as for triggering actuators need to be developed. In this paper, we present an architecture for integrating sensors and actuators into the future Internet. In our concept, all sensors and actuators are connected via gateways to the Internet, that will be used as comprehensive transport medium. Additionally, an entity is needed for registering all sensors and actuators, and managing sensor data requests. We decided to use a hierarchical structure, comparable to the Domain Name Service. This approach realizes a cost-efficient architecture disposing of "plug and play" capabilities and accounting for privacy issues.

Schneider, J.; Klein, A.; Mannweiler, C.; Schotten, H. D.

2011-08-01

114

Web-Based Collaborative Learning Architecture for Remote Experiment on Control of Bioreactor’s Environment  

Directory of Open Access Journals (Sweden)

Full Text Available The unprecedented growth in Internet technologies has created revolutionary changes in collaborative working in an on-line environment with round the world accessibility. The adoption of collaborative learning tools with remote laboratory enhances the experiential learning aspects of engineering education. This paper presents a collaborative learning and remote experiment on the control of a bioreactor environment by establishing communication between the process control computer and remote users through the Internet. The software application is developed using graphical programming tools to control the process parameters and to set the control constants associated with the PID control system. The LabVIEW virtual instruments transfer information to web clients is performed using web server and standard internet browsers for data access. Multimedia features are added to the architecture to supplement the teaching and learning activities. The proposed system structure and functionalities tend towards the translation of traditional collaborative characteristics into an Internet based on-line collaborative learning environment.

A.P Jagadeesh Chandra; R.D Sudhaker Samuel

2009-01-01

115

Ecce - A Problem Solving Environment's Evolution Toward Grid Services and a Web Architecture  

Energy Technology Data Exchange (ETDEWEB)

The Extensible Computational Chemistry Environment (Ecce), an innovative problem solving environment (PSE), was designed a decade ago, before the emergence of the Web and Grid computing services. In this paper, we briefly examine the original Ecce architecture and discuss how it is evolving to incorporate both Grid services and componenet of the Web to increase its range of services, reduce deployment and maintenance costs, and reach a wider audience. We show that Ecce operates in both Grid and non-Grid environments, an important consideration given Ecce's broad range of uses and user community, and discuss the strategies for loosely coupled components that make this possible. Both in-progress work and conceptual plans for how Ecce will evolve are presented.

Schuchardt, Karen L.; Didier, Brett T.; Black, Gary D.

2002-01-01

116

A unified architecture for biomedical search engines based on semantic web technologies.  

UK PubMed Central (United Kingdom)

There is a huge growth in the volume of published biomedical research in recent years. Many medical search engines are designed and developed to address the over growing information needs of biomedical experts and curators. Significant progress has been made in utilizing the knowledge embedded in medical ontologies and controlled vocabularies to assist these engines. However, the lack of common architecture for utilized ontologies and overall retrieval process, hampers evaluating different search engines and interoperability between them under unified conditions. In this paper, a unified architecture for medical search engines is introduced. Proposed model contains standard schemas declared in semantic web languages for ontologies and documents used by search engines. Unified models for annotation and retrieval processes are other parts of introduced architecture. A sample search engine is also designed and implemented based on the proposed architecture in this paper. The search engine is evaluated using two test collections and results are reported in terms of precision vs. recall and mean average precision for different approaches used by this search engine.

Jalali V; Matash Borujerdi MR

2011-04-01

117

Magnetic resonance imaging (MRI) simulation on EGEE grid architecture: a web portal design.  

UK PubMed Central (United Kingdom)

In this paper, we present a web portal that enables simulation of MRI images on the grid. Such simulations are done using the SIMRI MRI simulator that is implemented on the grid using MPI and the LCG2 middleware. MRI simulations are mainly used to study MRI sequence, and to validate image processing algorithms. As MRI simulation is computationally very expensive, grid technologies appear to be a real added value for the MRI simulation task. Nevertheless the grid access should be simplified to enable final user running MRI simulations. That is why we develop this specific web portal to propose a user friendly interface for MRI simulation on the grid. The web portal is designed using a three layers client/server architecture. Its main component is the process layer part that manages the simulation jobs. This part is mainly based on a java thread that screens a data base of simulation jobs. The thread submits the new jobs to the grid and updates the status of the running jobs. When a job is terminated, the thread sends the simulated image to the user. Through a client web interface, the user can submit new simulation jobs, get a detailed status of the running jobs, have the history of all the terminated jobs as well as their status and corresponding simulated image.

Bellet F; Nistoreanu I; Pera C; Benoit-Cattin H

2006-01-01

118

Intelligent On-Board Processing in the Sensor Web  

Science.gov (United States)

Most existing sensing systems are designed as passive, independent observers. They are rarely aware of the phenomena they observe, and are even less likely to be aware of what other sensors are observing within the same environment. Increasingly, intelligent processing of sensor data is taking place in real-time, using computing resources on-board the sensor or the platform itself. One can imagine a sensor network consisting of intelligent and autonomous space-borne, airborne, and ground-based sensors. These sensors will act independently of one another, yet each will be capable of both publishing and receiving sensor information, observations, and alerts among other sensors in the network. Furthermore, these sensors will be capable of acting upon this information, perhaps altering acquisition properties of their instruments, changing the location of their platform, or updating processing strategies for their own observations to provide responsive information or additional alerts. Such autonomous and intelligent sensor networking capabilities provide significant benefits for collections of heterogeneous sensors within any environment. They are crucial for multi-sensor observations and surveillance, where real-time communication with external components and users may be inhibited, and the environment may be hostile. In all environments, mission automation and communication capabilities among disparate sensors will enable quicker response to interesting, rare, or unexpected events. Additionally, an intelligent network of heterogeneous sensors provides the advantage that all of the sensors can benefit from the unique capabilities of each sensor in the network. The University of Alabama in Huntsville (UAH) is developing a unique approach to data processing, integration and mining through the use of the Adaptive On-Board Data Processing (AODP) framework. AODP is a key foundation technology for autonomous internetworking capabilities to support situational awareness by sensors and their on-board processes. The two primary research areas for this project are (1) the on-board processing and communications framework itself, and (2) data mining algorithms targeted to the needs and constraints of the on-board environment. The team is leveraging its experience in on-board processing, data mining, custom data processing, and sensor network design. Several unique UAH-developed technologies are employed in the AODP project, including EVE, an EnVironmEnt for on-board processing, and the data mining tools included in the Algorithm Development and Mining (ADaM) toolkit.

Tanner, S.

2005-12-01

119

Integration of Grid and Sensor Web for Flood Monitoring and Risk Assessment from Heterogeneous Data  

Science.gov (United States)

Over last decades we have witnessed the upward global trend in natural disaster occurrence. Hydrological and meteorological disasters such as floods are the main contributors to this pattern. In recent years flood management has shifted from protection against floods to managing the risks of floods (the European Flood risk directive). In order to enable operational flood monitoring and assessment of flood risk, it is required to provide an infrastructure with standardized interfaces and services. Grid and Sensor Web can meet these requirements. In this paper we present a general approach to flood monitoring and risk assessment based on heterogeneous geospatial data acquired from multiple sources. To enable operational flood risk assessment integration of Grid and Sensor Web approaches is proposed [1]. Grid represents a distributed environment that integrates heterogeneous computing and storage resources administrated by multiple organizations. SensorWeb is an emerging paradigm for integrating heterogeneous satellite and in situ sensors and data systems into a common informational infrastructure that produces products on demand. The basic Sensor Web functionality includes sensor discovery, triggering events by observed or predicted conditions, remote data access and processing capabilities to generate and deliver data products. Sensor Web is governed by the set of standards, called Sensor Web Enablement (SWE), developed by the Open Geospatial Consortium (OGC). Different practical issues regarding integration of Sensor Web with Grids are discussed in the study. We show how the Sensor Web can benefit from using Grids and vice versa. For example, Sensor Web services such as SOS, SPS and SAS can benefit from the integration with the Grid platform like Globus Toolkit. The proposed approach is implemented within the Sensor Web framework for flood monitoring and risk assessment, and a case-study of exploiting this framework, namely the Namibia SensorWeb Pilot Project, is described. The project was created as a testbed for evaluating and prototyping key technologies for rapid acquisition and distribution of data products for decision support systems to monitor floods and enable flood risk assessment. The system provides access to real-time products on rainfall estimates and flood potential forecast derived from the Tropical Rainfall Measuring Mission (TRMM) mission with lag time of 6 h, alerts from the Global Disaster Alert and Coordination System (GDACS) with lag time of 4 h, and the Coupled Routing and Excess STorage (CREST) model to generate alerts. These are alerts are used to trigger satellite observations. With deployed SPS service for NASA's EO-1 satellite it is possible to automatically task sensor with re-image capability of less 8 h. Therefore, with enabled computational and storage services provided by Grid and cloud infrastructure it was possible to generate flood maps within 24-48 h after trigger was alerted. To enable interoperability between system components and services OGC-compliant standards are utilized. [1] Hluchy L., Kussul N., Shelestov A., Skakun S., Kravchenko O., Gripich Y., Kopp P., Lupian E., "The Data Fusion Grid Infrastructure: Project Objectives and Achievements," Computing and Informatics, 2010, vol. 29, no. 2, pp. 319-334.

Kussul, Nataliia; Skakun, Sergii; Shelestov, Andrii

2013-04-01

120

An Integrative Architecture for a Sensor-Supported Trust Management System  

Directory of Open Access Journals (Sweden)

Full Text Available Trust plays a key role not only in e-worlds and emerging pervasive computing environments, but also already for millennia in human societies. Trust management solutions that have being around now for some fifteen years were primarily developed for the above mentioned cyber environments and they are typically focused on artificial agents, sensors, etc. However, this paper presents extensions of a new methodology together with architecture for trust management support that is focused on humans and human-like agents. With this methodology and architecture sensors play a crucial role. The architecture presents an already deployable tool for multi and interdisciplinary research in various areas where humans are involved. It provides new ways to obtain an insight into dynamics and evolution of such structures, not only in pervasive computing environments, but also in other important areas like management and decision making support.

Denis Tr?ek

2012-01-01

 
 
 
 
121

An integrative architecture for a sensor-supported trust management system.  

UK PubMed Central (United Kingdom)

Trust plays a key role not only in e-worlds and emerging pervasive computing environments, but also already for millennia in human societies. Trust management solutions that have being around now for some fifteen years were primarily developed for the above mentioned cyber environments and they are typically focused on artificial agents, sensors, etc. However, this paper presents extensions of a new methodology together with architecture for trust management support that is focused on humans and human-like agents. With this methodology and architecture sensors play a crucial role. The architecture presents an already deployable tool for multi and interdisciplinary research in various areas where humans are involved. It provides new ways to obtain an insight into dynamics and evolution of such structures, not only in pervasive computing environments, but also in other important areas like management and decision making support.

Tr?ek D

2012-01-01

122

Fabrication of spindle-like ZnO architectures for highly sensitive gas sensors  

Science.gov (United States)

Spindle-like zinc oxide (ZnO) architectures with a width of about 230 nm and length of about 460 nm were successfully synthesized by a facile hydrothermal approach, and the structures were uniform and monodisperse. Oleylamine played a crucial role in controlling the morphology of ZnO products. The composition, morphology and structure of the products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). A plausible formation mechanism of the spindle-like ZnO architecture was proposed. The gas sensing investigations indicated that the spindle-like ZnO architecture is an ideal candidate for fabricating highly sensitive gas sensors. Moreover, the sensing mechanism of the sensor has also been investigated.

Chen, Xiaoshuang; Jing, Xiaoyan; Wang, Jun; Liu, Jingyuan; Song, Dalei; Liu, Lianhe

2013-11-01

123

Botnet Detection Architecture Based on Heterogeneous Multi-sensor Information Fusion  

Directory of Open Access Journals (Sweden)

Full Text Available As technology has been developed rapidly, botnet threats to the global cyber community are also increasing. And the botnet detection has recently become a major research topic in the field of network security. Most of the current detection approaches work only on the evidence from single information source, which can not hold all the traces of botnet and hardly achieve high accuracy. In this paper, a novel botnet detection architecture based on heterogeneous multi-sensor information fusion is proposed. The architecture is designed to carry out information integration in the three fusion levels of data, feature, and decision. As the core component, a feature extraction module is also elaborately designed. And an extended algorithm of the Dempster-Shafer (D-S) theory is proved and adopted in decision fusion. Furthermore, a representative case is provided to illustrate that the detection architecture can effectively fuse the complicated information from various sensors, thus to achieve better detection effect.

HaiLong Wang; Jie Hou; ZhengHu Gong

2011-01-01

124

An LDPC decoder architecture for wireless sensor network applications.  

UK PubMed Central (United Kingdom)

The pervasive use of wireless sensors in a growing spectrum of human activities reinforces the need for devices with low energy dissipation. In this work, coded communication between a couple of wireless sensor devices is considered as a method to reduce the dissipated energy per transmitted bit with respect to uncoded communication. Different Low Density Parity Check (LDPC) codes are considered to this purpose and post layout results are shown for a low-area low-energy decoder, which offers percentage energy savings with respect to the uncoded solution in the range of 40%-80%, depending on considered environment, distance and bit error rate.

Biroli AD; Martina M; Masera G

2012-01-01

125

An LDPC decoder architecture for wireless sensor network applications.  

Science.gov (United States)

The pervasive use of wireless sensors in a growing spectrum of human activities reinforces the need for devices with low energy dissipation. In this work, coded communication between a couple of wireless sensor devices is considered as a method to reduce the dissipated energy per transmitted bit with respect to uncoded communication. Different Low Density Parity Check (LDPC) codes are considered to this purpose and post layout results are shown for a low-area low-energy decoder, which offers percentage energy savings with respect to the uncoded solution in the range of 40%-80%, depending on considered environment, distance and bit error rate. PMID:22438724

Biroli, Andrea Dario Giancarlo; Martina, Maurizio; Masera, Guido

2012-02-06

126

Low-Power Direct-Sequence Spread-Spectrum Modem Architecture for Distributed Wireless Sensor Networks  

Energy Technology Data Exchange (ETDEWEB)

Emerging CMOS and MEMS technologies enable the implementation of a large number of wireless distributed microsensors that can be easily and rapidly deployed to form highly redundant, self-configuring, and ad hoc sensor networks. To facilitate ease of deployment, these sensors should operate on battery for extended periods of time. A particular challenge in maintaining extended battery lifetime lies in achieving communications with low power. This paper presents a direct-sequence spread-spectrum modem architecture that provides robust communications for wireless sensor networks while dissipating very low power. The modem architecture has been verified in an FPGA implementation that dissipates only 33 mW for both transmission and reception. The implementation can be easily mapped to an ASIC technology, with an estimated power performance of less than 1 mW.

Chien, C; Elgorriaga, I; McConaghy, C

2001-07-03

127

A Multi-Layer Architecture for Wireless Sensor Network Virtualization  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Wireless sensor networks (WSNs) have become pervasive and are used for a plethora of applications and services. They are usually deployed with specific applications and services; thereby precluding their re-use when other applications and services are contemplated. This can inevitably lead to the pr...

Khan, Imran; Belqasmi, Fatna; GLITHO, Roch; Crespi, Noel

128

Optimized autonomous space in-situ sensor web for volcano monitoring  

Science.gov (United States)

In response to NASA's announced requirement for Earth hazard monitoring sensor-web technology, a multidisciplinary team involving sensor-network experts (Washington State University), space scientists (JPL), and Earth scientists (USGS Cascade Volcano Observatory (CVO)), have developed a prototype of dynamic and scalable hazard monitoring sensor-web and applied it to volcano monitoring. The combined Optimized Autonomous Space In-situ Sensor-web (OASIS) has two-way communication capability between ground and space assets, uses both space and ground data for optimal allocation of limited bandwidth resources on the ground, and uses smart management of competing demands for limited space assets. It also enables scalability and seamless infusion of future space and in-situ assets into the sensor-web. The space and in-situ control components of the system are integrated such that each element is capable of autonomously tasking the other. The ground in-situ was deployed into the craters and around the flanks of Mount St. Helens in July 2009, and linked to the command and control of the Earth Observing One (EO-1) satellite. ?? 2010 IEEE.

Song, W. -Z.; Shirazi, B.; Huang, R.; Xu, M.; Peterson, N.; Lahusen, R.; Pallister, J.; Dzurisin, D.; Moran, S.; Lisowski, M.; Kedar, S.; Chien, S.; Webb, F.; Kiely, A.; Doubleday, J.; Davies, A.; Pieri, D.

2010-01-01

129

Architecture Aware Key Management Scheme for Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available The emergence of wireless networking as well as the development in embedded systems and technologies have given birth to application specific networks called wireless sensor networks WSNs, their flexibility, facility of use and deployment as well as their low cost give them an increasing field of applications. Usually sensors are limited in capacities deployed in a hostile and unpredictable environment, making the security of these networks a challenging task. In this paper we are going to present a key management scheme in which the base station play the role of the secure third party responsible of distributing key and managing security in the network, two versions of this scheme are presented the first one for flat networks and the second one for hierarchical networks in which the cluster head play the key role in all key agreement with the base station.

Benamar KADRI; Mohammed FEHAM; Abdellah MHAMMED

2012-01-01

130

An architecture for performance optimization in a collaborative knowledge-based approach for wireless sensor networks.  

UK PubMed Central (United Kingdom)

Over the past few years, Intelligent Spaces (ISs) have received the attention of many Wireless Sensor Network researchers. Recently, several studies have been devoted to identify their common capacities and to set up ISs over these networks. However, little attention has been paid to integrating Fuzzy Rule-Based Systems into collaborative Wireless Sensor Networks for the purpose of implementing ISs. This work presents a distributed architecture proposal for collaborative Fuzzy Rule-Based Systems embedded in Wireless Sensor Networks, which has been designed to optimize the implementation of ISs. This architecture includes the following: (a) an optimized design for the inference engine; (b) a visual interface; (c) a module to reduce the redundancy and complexity of the knowledge bases; (d) a module to evaluate the accuracy of the new knowledge base; (e) a module to adapt the format of the rules to the structure used by the inference engine; and (f) a communications protocol. As a real-world application of this architecture and the proposed methodologies, we show an application to the problem of modeling two plagues of the olive tree: prays (olive moth, Prays oleae Bern.) and repilo (caused by the fungus Spilocaea oleagina). The results show that the architecture presented in this paper significantly decreases the consumption of resources (memory, CPU and battery) without a substantial decrease in the accuracy of the inferred values.

Gadeo-Martos MA; Fernandez-Prieto JA; Canada-Bago J; Velasco JR

2011-01-01

131

A cluster-based architecture to structure the topology of parallel wireless sensor networks.  

UK PubMed Central (United Kingdom)

A wireless sensor network is a self-configuring network of mobile nodes connected by wireless links where the nodes have limited capacity and energy. In many cases, the application environment requires the design of an exclusive network topology for a particular case. Cluster-based network developments and proposals in existence have been designed to build a network for just one type of node, where all nodes can communicate with any other nodes in their coverage area. Let us suppose a set of clusters of sensor nodes where each cluster is formed by different types of nodes (e.g., they could be classified by the sensed parameter using different transmitting interfaces, by the node profile or by the type of device: laptops, PDAs, sensor etc.) and exclusive networks, as virtual networks, are needed with the same type of sensed data, or the same type of devices, or even the same type of profiles. In this paper, we propose an algorithm that is able to structure the topology of different wireless sensor networks to coexist in the same environment. It allows control and management of the topology of each network. The architecture operation and the protocol messages will be described. Measurements from a real test-bench will show that the designed protocol has low bandwidth consumption and also demonstrates the viability and the scalability of the proposed architecture. Our ccluster-based algorithm is compared with other algorithms reported in the literature in terms of architecture and protocol measurements.

Lloret J; Garcia M; Bri D; Diaz JR

2009-01-01

132

A Cluster-Based Architecture to Structure the Topology of Parallel Wireless Sensor Networks  

Science.gov (United States)

A wireless sensor network is a self-configuring network of mobile nodes connected by wireless links where the nodes have limited capacity and energy. In many cases, the application environment requires the design of an exclusive network topology for a particular case. Cluster-based network developments and proposals in existence have been designed to build a network for just one type of node, where all nodes can communicate with any other nodes in their coverage area. Let us suppose a set of clusters of sensor nodes where each cluster is formed by different types of nodes (e.g., they could be classified by the sensed parameter using different transmitting interfaces, by the node profile or by the type of device: laptops, PDAs, sensor etc.) and exclusive networks, as virtual networks, are needed with the same type of sensed data, or the same type of devices, or even the same type of profiles. In this paper, we propose an algorithm that is able to structure the topology of different wireless sensor networks to coexist in the same environment. It allows control and management of the topology of each network. The architecture operation and the protocol messages will be described. Measurements from a real test-bench will show that the designed protocol has low bandwidth consumption and also demonstrates the viability and the scalability of the proposed architecture. Our ccluster-based algorithm is compared with other algorithms reported in the literature in terms of architecture and protocol measurements.

Lloret, Jaime; Garcia, Miguel; Bri, Diana; Diaz, Juan R.

2009-01-01

133

A Cluster-Based Architecture to Structure the Topology of Parallel Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available A wireless sensor network is a self-configuring network of mobile nodes connected by wireless links where the nodes have limited capacity and energy. In many cases, the application environment requires the design of an exclusive network topology for a particular case. Cluster-based network developments and proposals in existence have been designed to build a network for just one type of node, where all nodes can communicate with any other nodes in their coverage area. Let us suppose a set of clusters of sensor nodes where each cluster is formed by different types of nodes (e.g., they could be classified by the sensed parameter using different transmitting interfaces, by the node profile or by the type of device: laptops, PDAs, sensor etc.) and exclusive networks, as virtual networks, are needed with the same type of sensed data, or the same type of devices, or even the same type of profiles. In this paper, we propose an algorithm that is able to structure the topology of different wireless sensor networks to coexist in the same environment. It allows control and management of the topology of each network. The architecture operation and the protocol messages will be described. Measurements from a real test-bench will show that the designed protocol has low bandwidth consumption and also demonstrates the viability and the scalability of the proposed architecture. Our ccluster-based algorithm is compared with other algorithms reported in the literature in terms of architecture and protocol measurements.

Jaime Lloret; Miguel Garcia; Diana Bri; Juan R. Diaz

2009-01-01

134

Game and Balance Multicast Architecture Algorithms for Sensor Grid  

Directory of Open Access Journals (Sweden)

Full Text Available We propose a scheme to attain shorter multicast delay and higher efficiency in the data transfer of sensor grid. Our scheme, in one cluster, seeks the central node, calculates the space and the data weight vectors. Then we try to find a new vector composed by linear combination of the two old ones. We use the equal correlation coefficient between the new and old vectors to find the point of game and balance of the space and data factorsbuild a binary simple equation, seek linear parameters, and generate a least weight path tree. We handled the issue from a quantitative way instead of a qualitative way. Based on this idea, we considered the scheme from both the space and data factor, then we built the mathematic model, set up game and balance relationship and finally resolved the linear indexes, according to which we improved the transmission efficiency of sensor grid. Extended simulation results indicate that our scheme attains less average multicast delay and number of links used compared with other well-known existing schemes.

Qingfeng Fan; Qiongli Wu; Frèdèric Magoulés; Naixue Xiong; Athanasios V. Vasilakos; Yanxiang He

2009-01-01

135

A Distributed Software Architecture for Collaborative Teleoperation based on a VR Platform and Web Application Interoperability  

CERN Multimedia

Augmented Reality and Virtual Reality can provide to a Human Operator (HO) a real help to complete complex tasks, such as robot teleoperation and cooperative teleassistance. Using appropriate augmentations, the HO can interact faster, safer and easier with the remote real world. In this paper, we present an extension of an existing distributed software and network architecture for collaborative teleoperation based on networked human-scaled mixed reality and mobile platform. The first teleoperation system was composed by a VR application and a Web application. However the 2 systems cannot be used together and it is impossible to control a distant robot simultaneously. Our goal is to update the teleoperation system to permit a heterogeneous collaborative teleoperation between the 2 platforms. An important feature of this interface is based on different Mobile platforms to control one or many robots.

Domingues, Christophe; Davesne, Frédéric; Mallem, Malik

2009-01-01

136

Frontier: High Performance Database Access Using Standard Web Components in a Scalable Multi-Tier Architecture  

Energy Technology Data Exchange (ETDEWEB)

A high performance system has been assembled using standard web components to deliver database information to a large number of broadly distributed clients. The CDF Experiment at Fermilab is establishing processing centers around the world imposing a high demand on their database repository. For delivering read-only data, such as calibrations, trigger information, and run conditions data, we have abstracted the interface that clients use to retrieve data objects. A middle tier is deployed that translates client requests into database specific queries and returns the data to the client as XML datagrams. The database connection management, request translation, and data encoding are accomplished in servlets running under Tomcat. Squid Proxy caching layers are deployed near the Tomcat servers, as well as close to the clients, to significantly reduce the load on the database and provide a scalable deployment model. Details the system's construction and use are presented, including its architecture, design, interfaces, administration, performance measurements, and deployment plan.

Kosyakov, S.; Kowalkowski, J.; Litvintsev, D.; Lueking, L.; Paterno, M.; White, S.P.; /Fermilab; Autio, Lauri; /Helsinki U.; Blumenfeld, B.; Maksimovic, P.; Mathis, M.; /Johns Hopkins U.

2004-09-01

137

Modular Architecture for Sensor Systems (MASS) : description, analysis, simulation, and implementation.  

Energy Technology Data Exchange (ETDEWEB)

A particular engineering aspect of distributed sensor networks that has not received adequate attention is the system level hardware architecture of the individual nodes of the network. A novel hardware architecture based on an idea of task specific modular computing is proposed to provide for both the high flexibility and low power consumption required for distributed sensing solutions. The power consumption of the architecture is mathematically analyzed against a traditional approach, and guidelines are developed for application scenarios that would benefit from using this new design. Furthermore a method of decentralized control for the modular system is developed and analyzed. Finally, a few policies for power minimization in the decentralized system are proposed and analyzed.

Stark, Douglas P.; Davis, Jesse Zehring; Edmonds, Nicholas

2004-11-01

138

A Web-based DSS Architecture and its Forecasting Core in Supply Chain Management  

Directory of Open Access Journals (Sweden)

Full Text Available In a competitive market environment, supply chain management (SCM) has been critical for companies to survive. Demand planning plays an important role in SCM, for it provides accurate demand forecasts which may achieve customer satisfaction by offering benefits such as low inventory level, short lead time, efficient resource allocation, and quick response. To obtain more accurate forecasts, this study presents a web-based Decision Support System (DSS) architecture and its forecasting core. The forecasting core, named Panel Function, contains three modules: Segmentation Module, Forecasting Module, and Coordination Module. The Segmentation Module categorizes customers into three segments: Loyal Customer Segment, Potential Customer Segment, and Switcher Segment. Based on the three segments, the Forecasting Module employs different forecasting and analysis technologies to make an integrated forecast estimate: time-seriesforecasting to capture the loyal customer demand trend, Bayesian inference to estimate the predicted value of switcher purchase quantity, and questionnaire analysis and brand choicemodels to unearth potential customers. The results from these three processes are then synthesized to obtain the integrated forecast, which is then used in the Coordination Module as the base of distribution planning, and provides a minimal system-wide total costsolution for all parties in the supply chain. As a whole, this DSS architecture has been shown to provide an efficient mechanism for collaborative demand planning and help create the maximum profit for the supply chain.

Tien-You Wang; Din-Horng Yeh

2009-01-01

139

Hierarchical structures made of proteins. The complex architecture of spider webs and their constituent silk proteins.  

Science.gov (United States)

Biopolymers fulfil a variety of different functions in nature. They conduct various processes inside and outside cells and organisms, with a functionality ranging from storage of information to stabilization, protection, shaping, transport, cellular division, or movement of whole organisms. Within the plethora of biopolymers, the most sophisticated group is of proteinaceous origin: the cytoskeleton of a cell is made of protein filaments that aid in pivotal processes like intracellular transport, movement, and cell division; geckos use a distinct arrangement of keratin-like filaments on their toes which enable them to walk up smooth surfaces, such as walls, and even upside down across ceilings; and spiders spin silks that are extra-corporally used for protection of offspring and construction of complex prey traps. The following tutorial review describes the hierarchical organization of protein fibers, using spider dragline silk as an example. The properties of a dragline silk thread originate from the strictly controlled assembly of the underlying protein chains. The assembly procedure leads to protein fibers showing a complex hierarchical organization comprising three different structural phases. This structural organization is responsible for the outstanding mechanical properties of individual fibers, which out-compete even those of high-performance artificial fibers like Kevlar. Web-weaving spiders produce, in addition to dragline silk, other silks with distinct properties, based on slightly variant constituent proteins--a feature that allows construction of highly sophisticated spider webs with well designed architectures and with optimal mechanical properties for catching prey. PMID:20023846

Heim, Markus; Römer, Lin; Scheibel, Thomas

2009-10-16

140

Hierarchical structures made of proteins. The complex architecture of spider webs and their constituent silk proteins.  

UK PubMed Central (United Kingdom)

Biopolymers fulfil a variety of different functions in nature. They conduct various processes inside and outside cells and organisms, with a functionality ranging from storage of information to stabilization, protection, shaping, transport, cellular division, or movement of whole organisms. Within the plethora of biopolymers, the most sophisticated group is of proteinaceous origin: the cytoskeleton of a cell is made of protein filaments that aid in pivotal processes like intracellular transport, movement, and cell division; geckos use a distinct arrangement of keratin-like filaments on their toes which enable them to walk up smooth surfaces, such as walls, and even upside down across ceilings; and spiders spin silks that are extra-corporally used for protection of offspring and construction of complex prey traps. The following tutorial review describes the hierarchical organization of protein fibers, using spider dragline silk as an example. The properties of a dragline silk thread originate from the strictly controlled assembly of the underlying protein chains. The assembly procedure leads to protein fibers showing a complex hierarchical organization comprising three different structural phases. This structural organization is responsible for the outstanding mechanical properties of individual fibers, which out-compete even those of high-performance artificial fibers like Kevlar. Web-weaving spiders produce, in addition to dragline silk, other silks with distinct properties, based on slightly variant constituent proteins--a feature that allows construction of highly sophisticated spider webs with well designed architectures and with optimal mechanical properties for catching prey.

Heim M; Römer L; Scheibel T

2010-01-01

 
 
 
 
141

An Ontological Approach to Representing and Reasoning about Events in the Sensor Web  

Science.gov (United States)

While observations are fed into the Sensor Web through a growing number of environmental sensors, the challenge is to infer information about geographic events they reflect. For example, we may ask what the measurements mean when a service compiles hourly wind speeds from different providers. The service should perhaps include meaningful descriptions than just the measurements; for instance, whether the wind occurring at a particular site is nearly calm or reflects a windstorm. Similarly, we may want to know the intensity of a snowfall occurrence from a series of visibility measurements supplied by a visibility sensor. A systematic approach representing domain knowledge is vital when reasoning about events at the conceptual level. A description of how one gets from observations to inferred events must be expressed. Environmental models usually capture such information. Nonetheless, they jeopardize transparency; the information contained within these models is implicit, limited to domain experts, and hard to acquire or manipulate. The formal specifications in the Semantic Sensor Web primarily describe sensors and observations; they do not describe information concerning geographic events. Existing event-oriented ontologies represent common concepts concerning events, e.g., participant, time, location and relations between events. Nevertheless, the event-of-interest is not explicitly associated with sensing concepts such as observation event, sensor and result. This paper delivers an ontology to formally capture the relations between observations and geographic events. The ontology constitutes common building blocks for constructing application ontologies that account for inferences of the former from the latter. The formal vocabularies are exploited with a rule-based mechanism to support inferences of events from in-situ observations. The paper also demonstrates how these vocabularies are used to formulate symbolic spatio-temporal queries in the Sensor Web. A use case for reasoning about blizzards and their temporal parts from time series supplied by the Environment Canada illustrates the ontological approach.

Devaraju, Anusuriya

2013-04-01

142

Spatial Search Techniques for Mobile 3D Queries in Sensor Web Environments  

Directory of Open Access Journals (Sweden)

Full Text Available Developing mobile geo-information systems for sensor web applications involves technologies that can access linked geographical and semantically related Internet information. Additionally, in tomorrow’s Web 4.0 world, it is envisioned that trillions of inexpensive micro-sensors placed throughout the environment will also become available for discovery based on their unique geo-referenced IP address. Exploring these enormous volumes of disparate heterogeneous data on today’s location and orientation aware smartphones requires context-aware smart applications and services that can deal with “information overload”. 3DQ (Three Dimensional Query) is our novel mobile spatial interaction (MSI) prototype that acts as a next-generation base for human interaction within such geospatial sensor web environments/urban landscapes. It filters information using “Hidden Query Removal” functionality that intelligently refines the search space by calculating the geometry of a three dimensional visibility shape (Vista space) at a user’s current location. This 3D shape then becomes the query “window” in a spatial database for retrieving information on only those objects visible within a user’s actual 3D field-of-view. 3DQ reduces information overload and serves to heighten situation awareness on constrained commercial off-the-shelf devices by providing visibility space searching as a mobile web service. The effects of variations in mobile spatial search techniques in terms of query speed vs. accuracy are evaluated and presented in this paper.

Junjun Yin; James D. Carswell

2013-01-01

143

High performance architecture design for large scale fibre-optic sensor arrays using distributed EDFAs and hybrid TDM/DWDM  

Science.gov (United States)

A distributed amplified dense wavelength division multiplexing (DWDM) array architecture is presented for interferometric fibre-optic sensor array systems. This architecture employs a distributed erbium-doped fibre amplifier (EDFA) scheme to decrease the array insertion loss, and employs time division multiplexing (TDM) at each wavelength to increase the number of sensors that can be supported. The first experimental demonstration of this system is reported including results which show the potential for multiplexing and interrogating up to 4096 sensors using a single telemetry fibre pair with good system performance. The number can be increased to 8192 by using dual pump sources.

Liao, Yi; Austin, Ed; Nash, Philip J.; Kingsley, Stuart A.; Richardson, David J.

2013-09-01

144

A Unique Design based Processing Layer for Modular Architecture in Wireless Sensor Networks and its Applications  

Directory of Open Access Journals (Sweden)

Full Text Available The growth of sensor networks during the last years is a fact and within this field, wireless sensor networks are growing particularly as there are many applications that demand the use of many nodes(also called as mote), even hundreds or thousands. More and more applications are emerging to solve several problems in data acquisition and control in different environments, taking advantage of this technology. In this context, hardware design of the sensor network node becomes critical to satisfy the hard constraints imposed by wireless sensor networks, like low power consumption, low size and low cost. Moreover, these nodes must be capable of sensing, processing and communicating physical parameters, becoming true smart sensors in a network. With this goal in mind, we propose a modular architecture for the nodes, composed of four layers: communication, processing, power supply and sensing. The purpose is to minimize the redesign effort as well as to make the node flexible and adaptable to many different applications. In a first prototype of the node, we present a node with a mixed design based on a microcontroller and an FPGA for the processing layer and Bluetooth technology for communications.

Guttikonda Chaitra Bharati#1 , Akkela Ramakrishna *2 , Chagamreddy Jhansi #3 , K.Ajay Reddy$

2013-01-01

145

Historical building monitoring using an energy-efficient scalable wireless sensor network architecture.  

Science.gov (United States)

We present a set of novel low power wireless sensor nodes designed for monitoring wooden masterpieces and historical buildings, in order to perform an early detection of pests. Although our previous star-based system configuration has been in operation for more than 13 years, it does not scale well for sensorization of large buildings or when deploying hundreds of nodes. In this paper we demonstrate the feasibility of a cluster-based dynamic-tree hierarchical Wireless Sensor Network (WSN) architecture where realistic assumptions of radio frequency data transmission are applied to cluster construction, and a mix of heterogeneous nodes are used to minimize economic cost of the whole system and maximize power saving of the leaf nodes. Simulation results show that the specialization of a fraction of the nodes by providing better antennas and some energy harvesting techniques can dramatically extend the life of the entire WSN and reduce the cost of the whole system. A demonstration of the proposed architecture with a new routing protocol and applied to termite pest detection has been implemented on a set of new nodes and should last for about 10 years, but it provides better scalability, reliability and deployment properties. PMID:22346630

Capella, Juan V; Perles, Angel; Bonastre, Alberto; Serrano, Juan J

2011-10-25

146

Historical building monitoring using an energy-efficient scalable wireless sensor network architecture.  

UK PubMed Central (United Kingdom)

We present a set of novel low power wireless sensor nodes designed for monitoring wooden masterpieces and historical buildings, in order to perform an early detection of pests. Although our previous star-based system configuration has been in operation for more than 13 years, it does not scale well for sensorization of large buildings or when deploying hundreds of nodes. In this paper we demonstrate the feasibility of a cluster-based dynamic-tree hierarchical Wireless Sensor Network (WSN) architecture where realistic assumptions of radio frequency data transmission are applied to cluster construction, and a mix of heterogeneous nodes are used to minimize economic cost of the whole system and maximize power saving of the leaf nodes. Simulation results show that the specialization of a fraction of the nodes by providing better antennas and some energy harvesting techniques can dramatically extend the life of the entire WSN and reduce the cost of the whole system. A demonstration of the proposed architecture with a new routing protocol and applied to termite pest detection has been implemented on a set of new nodes and should last for about 10 years, but it provides better scalability, reliability and deployment properties.

Capella JV; Perles A; Bonastre A; Serrano JJ

2011-01-01

147

Historical Building Monitoring Using an Energy-Efficient Scalable Wireless Sensor Network Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available We present a set of novel low power wireless sensor nodes designed for monitoring wooden masterpieces and historical buildings, in order to perform an early detection of pests. Although our previous star-based system configuration has been in operation for more than 13 years, it does not scale well for sensorization of large buildings or when deploying hundreds of nodes. In this paper we demonstrate the feasibility of a cluster-based dynamic-tree hierarchical Wireless Sensor Network (WSN) architecture where realistic assumptions of radio frequency data transmission are applied to cluster construction, and a mix of heterogeneous nodes are used to minimize economic cost of the whole system and maximize power saving of the leaf nodes. Simulation results show that the specialization of a fraction of the nodes by providing better antennas and some energy harvesting techniques can dramatically extend the life of the entire WSN and reduce the cost of the whole system. A demonstration of the proposed architecture with a new routing protocol and applied to termite pest detection has been implemented on a set of new nodes and should last for about 10 years, but it provides better scalability, reliability and deployment properties.

Juan V. Capella; Angel Perles; Alberto Bonastre; Juan J. Serrano

2011-01-01

148

Applying Semantic Web Services and Wireless Sensor Networks for System Integration  

Science.gov (United States)

In environments like factories, buildings, and homes automation services tend to often change during their lifetime. Changes are concerned to business rules, process optimization, cost reduction, and so on. It is important to provide a smooth and straightforward way to deal with these changes so that could be handled in a faster and low cost manner. Some prominent solutions use the flexibility of Wireless Sensor Networks and the meaningful description of Semantic Web Services to provide service integration. In this work, we give an overview of current solutions for machinery integration that combine both technologies as well as a discussion about some perspectives and open issues when applying Wireless Sensor Networks and Semantic Web Services for automation services integration.

Berkenbrock, Gian Ricardo; Hirata, Celso Massaki; de Oliveira Júnior, Frederico Guilherme Álvares; de Oliveira, José Maria Parente

149

Electronic sensor and actuator webs for large-area complex geometry cardiac mapping and therapy.  

UK PubMed Central (United Kingdom)

Curved surfaces, complex geometries, and time-dynamic deformations of the heart create challenges in establishing intimate, nonconstraining interfaces between cardiac structures and medical devices or surgical tools, particularly over large areas. We constructed large area designs for diagnostic and therapeutic stretchable sensor and actuator webs that conformally wrap the epicardium, establishing robust contact without sutures, mechanical fixtures, tapes, or surgical adhesives. These multifunctional web devices exploit open, mesh layouts and mount on thin, bio-resorbable sheets of silk to facilitate handling in a way that yields, after dissolution, exceptionally low mechanical moduli and thicknesses. In vivo studies in rabbit and pig animal models demonstrate the effectiveness of these device webs for measuring and spatially mapping temperature, electrophysiological signals, strain, and physical contact in sheet and balloon-based systems that also have the potential to deliver energy to perform localized tissue ablation.

Kim DH; Ghaffari R; Lu N; Wang S; Lee SP; Keum H; D'Angelo R; Klinker L; Su Y; Lu C; Kim YS; Ameen A; Li Y; Zhang Y; de Graff B; Hsu YY; Liu Z; Ruskin J; Xu L; Lu C; Omenetto FG; Huang Y; Mansour M; Slepian MJ; Rogers JA

2012-12-01

150

Electronic sensor and actuator webs for large-area complex geometry cardiac mapping and therapy  

Science.gov (United States)

Curved surfaces, complex geometries, and time-dynamic deformations of the heart create challenges in establishing intimate, nonconstraining interfaces between cardiac structures and medical devices or surgical tools, particularly over large areas. We constructed large area designs for diagnostic and therapeutic stretchable sensor and actuator webs that conformally wrap the epicardium, establishing robust contact without sutures, mechanical fixtures, tapes, or surgical adhesives. These multifunctional web devices exploit open, mesh layouts and mount on thin, bio-resorbable sheets of silk to facilitate handling in a way that yields, after dissolution, exceptionally low mechanical moduli and thicknesses. In vivo studies in rabbit and pig animal models demonstrate the effectiveness of these device webs for measuring and spatially mapping temperature, electrophysiological signals, strain, and physical contact in sheet and balloon-based systems that also have the potential to deliver energy to perform localized tissue ablation.

Kim, Dae-Hyeong; Ghaffari, Roozbeh; Lu, Nanshu; Wang, Shuodao; Lee, Stephen P.; Keum, Hohyun; D'Angelo, Robert; Klinker, Lauren; Su, Yewang; Lu, Chaofeng; Kim, Yun-Soung; Ameen, Abid; Li, Yuhang; Zhang, Yihui; de Graff, Bassel; Hsu, Yung-Yu; Liu, ZhuangJian; Ruskin, Jeremy; Xu, Lizhi; Lu, Chi; Omenetto, Fiorenzo G.; Huang, Yonggang; Mansour, Moussa; Slepian, Marvin J.; Rogers, John A.

2012-01-01

151

Solving graph data issues using a layered architecture approach with applications to web spam detection.  

UK PubMed Central (United Kingdom)

This paper proposes the combination of two state-of-the-art algorithms for processing graph input data, viz., the probabilistic mapping graph self organizing map, an unsupervised learning approach, and the graph neural network, a supervised learning approach. We organize these two algorithms in a cascade architecture containing a probabilistic mapping graph self organizing map, and a graph neural network. We show that this combined approach helps us to limit the long-term dependency problem that exists when training the graph neural network resulting in an overall improvement in performance. This is demonstrated in an application to a benchmark problem requiring the detection of spam in a relatively large set of web sites. It is found that the proposed method produces results which reach the state of the art when compared with some of the best results obtained by others using quite different approaches. A particular strength of our method is its applicability towards any input domain which can be represented as a graph.

Scarselli F; Tsoi AC; Hagenbuchner M; Noi LD

2013-08-01

152

LIDeA: A Distributed Lightweight Intrusion Detection Architecture for Sensor Networks  

DEFF Research Database (Denmark)

Wireless sensor networks are vulnerable to adversaries as they are frequently deployed in open and unattended environments. Preventive mechanisms can be applied to protect them from an assortment of attacks. However, more sophisticated methods, like intrusion detection systems, are needed to achieve a more autonomic and complete defense mechanism, even against attacks that have not been anticipated in advance. In this paper, we present a lightweight intrusion detection system, called LIDeA, designed for wireless sensor networks. LIDeA is based on a distributed architecture, in which nodes overhear their neighboring nodes and collaborate with each other in order to successfully detect an intrusion. We show how such a system can be implemented in TinyOS, which components and interfaces are needed, and what is the resulting overhead imposed.

Giannetsos, Athanasios; Krontiris, Ioannis

2008-01-01

153

Single-photon sampling architecture for solid-state imaging sensors.  

UK PubMed Central (United Kingdom)

Advances in solid-state technology have enabled the development of silicon photomultiplier sensor arrays capable of sensing individual photons. Combined with high-frequency time-to-digital converters (TDCs), this technology opens up the prospect of sensors capable of recording with high accuracy both the time and location of each detected photon. Such a capability could lead to significant improvements in imaging accuracy, especially for applications operating with low photon fluxes such as light detection and ranging and positron-emission tomography. The demands placed on on-chip readout circuitry impose stringent trade-offs between fill factor and spatiotemporal resolution, causing many contemporary designs to severely underuse the technology's full potential. Concentrating on the low photon flux setting, this paper leverages results from group testing and proposes an architecture for a highly efficient readout of pixels using only a small number of TDCs. We provide optimized design instances for various sensor parameters and compute explicit upper and lower bounds on the number of TDCs required to uniquely decode a given maximum number of simultaneous photon arrivals. To illustrate the strength of the proposed architecture, we note a typical digitization of a 60 × 60 photodiode sensor using only 142 TDCs. The design guarantees registration and unique recovery of up to four simultaneous photon arrivals using a fast decoding algorithm. By contrast, a cross-strip design requires 120 TDCs and cannot uniquely decode any simultaneous photon arrivals. Among other realistic simulations of scintillation events in clinical positron-emission tomography, the above design is shown to recover the spatiotemporal location of 99.98% of all detected photons.

van den Berg E; Candès E; Chinn G; Levin C; Olcott PD; Sing-Long C

2013-07-01

154

Designing an architecture for monitoring patients at home: ontologies and web services for clinical and technical management integration.  

UK PubMed Central (United Kingdom)

This paper presents the design and implementation of an architecture based on the combination of ontologies, rules, web services and the autonomic computing paradigm to manage data in home-based telemonitoring scenarios. The architecture includes two layers: 1) a conceptual layer and 2) a data and communication layer. On the one hand, the conceptual layer based on ontologies is proposed to unify the management procedure and integrate incoming data from all the sources involved in the telemonitoring process. On the other hand, the data and communication layer based on REST (REpresentational State Transfer) web service technologies is proposed to provide practical back-up to the use of the ontology, to provide a real implementation of the tasks it describes and thus to provide a means of exchanging data (support communication tasks). A case study regarding COPD (chronic obstructive pulmonary disease) data management is presented in order to evaluate the efficiency of the architecture. This proposed ontology-based solution defines a flexible and scalable architecture in order to address main challenges presented in home-based telemonitoring scenarios and thus provide a means to integrate, unify and transfer data supporting both clinical and technical management tasks.

Lasierra N; Alesanco A; Garcia J

2013-09-01

155

Framework for Testing Web Services Through SOA(Service Oriented Architecture)  

Directory of Open Access Journals (Sweden)

Full Text Available In today’s connected e-world Web Services is arguably the most popular and powerful software technology. This paper focuses on web services and also the various standards that have evolved over the years, such as XML, SOAP, WSDL, and UDDI. This paper advocates the need for testing web services as testingweb services poses a big challenge to testing professionals because of its inherently complex and distributed nature. Web Service Automated Testing Utility will enable us to locate and invoke web service methods directly. It supports all of the core Web service technologies like WDSL, SOAP, and it is an ideal Web service tool for testing Web services, inspecting WSDL files, automating or accelerating verification of each component when developing Web service enabled applications.

Y.Prasanth1,V.Sarika, D.Santhosh Anuhya, Y.Vineela , A. Ajay Babu

2012-01-01

156

Optical flow in a smart sensor based on hybrid analog-digital architecture.  

Science.gov (United States)

The purpose of this study is to develop a motion sensor (delivering optical flow estimations) using a platform that includes the sensor itself, focal plane processing resources, and co-processing resources on a general purpose embedded processor. All this is implemented on a single device as a SoC (System-on-a-Chip). Optical flow is the 2-D projection into the camera plane of the 3-D motion information presented at the world scenario. This motion representation is widespread well-known and applied in the science community to solve a wide variety of problems. Most applications based on motion estimation require work in real-time; hence, this restriction must be taken into account. In this paper, we show an efficient approach to estimate the motion velocity vectors with an architecture based on a focal plane processor combined on-chip with a 32 bits NIOS II processor. Our approach relies on the simplification of the original optical flow model and its efficient implementation in a platform that combines an analog (focal-plane) and digital (NIOS II) processor. The system is fully functional and is organized in different stages where the early processing (focal plane) stage is mainly focus to pre-process the input image stream to reduce the computational cost in the post-processing (NIOS II) stage. We present the employed co-design techniques and analyze this novel architecture. We evaluate the system's performance and accuracy with respect to the different proposed approaches described in the literature. We also discuss the advantages of the proposed approach as well as the degree of efficiency which can be obtained from the focal plane processing capabilities of the system. The final outcome is a low cost smart sensor for optical flow computation with real-time performance and reduced power consumption that can be used for very diverse application domains. PMID:22319283

Guzmán, Pablo; Díaz, Javier; Agís, Rodrigo; Ros, Eduardo

2010-03-30

157

Optical flow in a smart sensor based on hybrid analog-digital architecture.  

UK PubMed Central (United Kingdom)

The purpose of this study is to develop a motion sensor (delivering optical flow estimations) using a platform that includes the sensor itself, focal plane processing resources, and co-processing resources on a general purpose embedded processor. All this is implemented on a single device as a SoC (System-on-a-Chip). Optical flow is the 2-D projection into the camera plane of the 3-D motion information presented at the world scenario. This motion representation is widespread well-known and applied in the science community to solve a wide variety of problems. Most applications based on motion estimation require work in real-time; hence, this restriction must be taken into account. In this paper, we show an efficient approach to estimate the motion velocity vectors with an architecture based on a focal plane processor combined on-chip with a 32 bits NIOS II processor. Our approach relies on the simplification of the original optical flow model and its efficient implementation in a platform that combines an analog (focal-plane) and digital (NIOS II) processor. The system is fully functional and is organized in different stages where the early processing (focal plane) stage is mainly focus to pre-process the input image stream to reduce the computational cost in the post-processing (NIOS II) stage. We present the employed co-design techniques and analyze this novel architecture. We evaluate the system's performance and accuracy with respect to the different proposed approaches described in the literature. We also discuss the advantages of the proposed approach as well as the degree of efficiency which can be obtained from the focal plane processing capabilities of the system. The final outcome is a low cost smart sensor for optical flow computation with real-time performance and reduced power consumption that can be used for very diverse application domains.

Guzmán P; Díaz J; Agís R; Ros E

2010-01-01

158

Optical Flow in a Smart Sensor Based on Hybrid Analog-Digital Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available The purpose of this study is to develop a motion sensor (delivering optical flow estimations) using a platform that includes the sensor itself, focal plane processing resources, and co-processing resources on a general purpose embedded processor. All this is implemented on a single device as a SoC (System-on-a-Chip). Optical flow is the 2-D projection into the camera plane of the 3-D motion information presented at the world scenario. This motion representation is widespread well-known and applied in the science community to solve a wide variety of problems. Most applications based on motion estimation require work in real-time; hence, this restriction must be taken into account. In this paper, we show an efficient approach to estimate the motion velocity vectors with an architecture based on a focal plane processor combined on-chip with a 32 bits NIOS II processor. Our approach relies on the simplification of the original optical flow model and its efficient implementation in a platform that combines an analog (focal-plane) and digital (NIOS II) processor. The system is fully functional and is organized in different stages where the early processing (focal plane) stage is mainly focus to pre-process the input image stream to reduce the computational cost in the post-processing (NIOS II) stage. We present the employed co-design techniques and analyze this novel architecture. We evaluate the system’s performance and accuracy with respect to the different proposed approaches described in the literature. We also discuss the advantages of the proposed approach as well as the degree of efficiency which can be obtained from the focal plane processing capabilities of the system. The final outcome is a low cost smart sensor for optical flow computation with real-time performance and reduced power consumption that can be used for very diverse application domains.

Pablo Guzmán; Javier Díaz; Rodrigo Agís; Eduardo Ros

2010-01-01

159

Semantics empowered web 3.0 managing enterprise, social, sensor, and cloud-based data and services for advanced applications  

CERN Document Server

After the traditional document-centric Web 1.0 and user-generated content focused Web 2.0, Web 3.0 has become a repository of an ever growing variety of Web resources that include data and services associated with enterprises, social networks, sensors, cloud, as well as mobile and other devices that constitute the Internet of Things. These pose unprecedented challenges in terms of heterogeneity (variety), scale (volume), and continuous changes (velocity), as well as present corresponding opportunities if they can be exploited. Just as semantics has played a critical role in dealing with data h

Sheth, Amit

2012-01-01

160

An Analytical Approach for Optimal Clustering Architecture for Maximizing Lifetime in Large Scale Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Many methods have been researched to prolong sensor network lifetime using mobile technologies. In the mobile sink research, there are the track based methods and the anchor points based methods as representative operation methods for mobile sinks. However, the existing methods decrease Quality of Service (QoS) and lead the routing hotspot in the vicinity of the mobile sink. In large scale wireless sensor networks, clustering is an effective technique for the purpose of improving the utilization of limited energy and prolonging the network lifetime. However, the problem of unbalanced energy dissipation exists in the multi-hop clustering model, where the cluster heads closer to the sink have to relay heavier traffic and consume more energy than farther nodes. In this paper we analyze several aspects based on the optimal clustering architecture for maximizing lifetime for large scale wireless sensor network. We also provide some analytical concepts for energy-aware head rotation and routing protocols to further balance the energy consumption among all nodes.

Mr. Yogesh Rai; Prof. Vineet Richhariya

2011-01-01

 
 
 
 
161

A Flexible Tool for Web Service Selection in Service Oriented Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Web Services are emerging technologies that enable application to application communication and reuse of services over Web. Semantic Web improves the quality of existing tasks, including Web services discovery, invocation, composition, monitoring, and recovery through describing Web services capabilities and content in a computer interpretable language. To provide most of the requested Web services, a Web service matchmaker is usually required. Web service matchmaking is the process of finding an appropriate provider for a requester through a middle agent. To provide the right service for the right user request, Quality of service (QoS)-based Web service selection is widely used. Employing QoS in Web service selection helps to satisfy user requirements through discovering the best service(s) in terms of the required QoS. Inspired by the mode of the Internet Web search engine, like Yahoo, Google, in this paper we provide a QoS-based service selection algorithm that is able to identify the best candidate semantic Web service(s) given the description of the requested service(s) and QoS criteria of user requirements. In addition, our proposed approach proposes a ranking method for those services. We also show how we employ data warehousing techniques to model the service selection problem. The proposed algorithm integrates traditional match making mechanism with data warehousing techniques. This integration of methodologies enables us to employ the historical preference of the user to provide better selection in future searches. The main result of the paper is a generic framework that is implemented to demonstrate the feasibility of the proposed algorithm for QoS-based Web application. Our presented experimental results show that the algorithm indeed performs well and increases the system reliability.

Walaa Nagy; Hoda M. O. Mokhtar; Ali El-Bastawissy

2011-01-01

162

A Pattern for Web-based WSN Monitoring (Invited Paper)  

Directory of Open Access Journals (Sweden)

Full Text Available This paper describes a pattern for the architecture of web-based wireless sensor network monitoring. Sensor nodes are used to measure characteristics of the physical environment and sensed data is stored on the Internet using web-based technologies. Users can access data remotely as long as they have Internet connectivity. Many wireless sensor network applications developed today use smartphones as a gateway between the sensor network or the user, and the Internet. This allows the sensor network and/or the users to be mobile. Implementation of a web-based wireless sensor network architecture, that uses smartphones, provides a scalable solution with applicability in many areas such as healthcare, environmental monitoring, border security, structural health monitoring, and many more.

Anthony Marcus; Mihaela Cardei; Ionut Cardei; Eduardo Fernandez; Fulvio Frati; Ernesto Damiani

2011-01-01

163

EVALUATION OF NON-FUNCTIONAL ATTRIBUTES USING WEB-BASED ARCHITECTURE  

Directory of Open Access Journals (Sweden)

Full Text Available The quality of an architectural design of a software system has a great influence on achieving nonfunctional requirements to the system. Here, we present a technique for describing behavioral aspects of software architectures formally based on Coloured Petri Nets (CPNs) and a technique for evaluating their non-functional qualities by analyzing CPNs . We provide quality models for valuating security, efficiency and reliability, and integrate them with CPN descriptions of software architectures. Their qualities areevaluated by simulating the CPNs on CPN analysis tool called esign/CPN. It allows us to clarify tradeoff on issues of selecting which architecture should be selected.

Pragati Priyadarshinee,; Dr Shekhar Verma

2011-01-01

164

Sensors  

Science.gov (United States)

Electronic sensors exist in many facets of our lives, from measuring operating conditions of our vehicles to adjusting the temperature of our homes. They can even mean the difference between life and death when used to monitor patients in emergency rooms. Even though sensors work transparently in their multitude of functions, their importance cannot be understated.Sensorland (1) has basic descriptions of a wide variety of sensors and related concepts. Out of the 50 items in the list, some have full technical reports that explain physical processes, while others consist of succinct explanations of a device's operation. The site covers sensors that measure everything from atmospheric pressure to the pH value of liquid solutions. In September 2002, the US Army conducted exercises using the zNose, a sensor that can quickly and quantitatively analyze any smell or vapor. This paper (2) provides a complete technical description of the zNose. Several more documents, including the press release of the Army's use of the device, can be found on the Electronic Sensor Technology homepage. In a related story from Sandia National Laboratories, the SnifferSTAR (3) could be especially useful in case of a terrorist gas attack. The short article briefly discusses how the invention works, with an emphasis on its characteristics of low power consumption and rapid analysis. Environmental Research Aircraft and Sensor Technology (4) is a NASA program to develop unmanned aerial vehicles capable of conducting advanced scientific studies. A number of aircraft are highlighted on the program's Web site, many of which are designed for long-term flights or potentially dangerous missions. The February 2003 cover story of Sensors magazine (5) is inertial sensing technology made from microelectromechanical systems (MEMS). The article discusses the applications of MEMS in accelerometers and gyroscopes, as well as explaining some of the theory behind these devices. A streaming video presentation, given in May 2002, can be viewed from this site (6). The hour-long talk introduces Sensor Webs, a network of tiny sensors connected by wireless technology that can be scattered over a large area to gather scientific data. Sensors can even be used in performing arts, as is shown in this paper from the Massachusetts Institute of Technology Media Lab (7). The authors propose using motion sensors to monitor hundreds of performers simultaneously, thereby allowing for much improved lighting and music responses. In the wake of the Space Shuttle Columbia tragedy, a great deal of attention was given to the intermittent and failing sensors on the shuttle minutes before it broke apart. This document from NASA shows the status of several sensors at various intervals in the shuttle's decent (8).

Leske, Cavin.

2003-01-01

165

Distributed design tools: Mapping targeted design tools onto a Web-based distributed architecture for high-performance computing  

Energy Technology Data Exchange (ETDEWEB)

Design Tools use a Web-based Java interface to guide a product designer through the design-to-analysis cycle for a specific, well-constrained design problem. When these Design Tools are mapped onto a Web-based distributed architecture for high-performance computing, the result is a family of Distributed Design Tools (DDTs). The software components that enable this mapping consist of a Task Sequencer, a generic Script Execution Service, and the storage of both data and metadata in an active, object-oriented database called the Product Database Operator (PDO). The benefits of DDTs include improved security, reliability, scalability (in both problem size and computing hardware), robustness, and reusability. In addition, access to the PDO unlocks its wide range of services for distributed components, such as lookup and launch capability, persistent shared memory for communication between cooperating services, state management, event notification, and archival of design-to-analysis session data.

Holmes, V.P.; Linebarger, J.M.; Miller, D.J.; Poore, C.A.

1999-11-30

166

A High-level Architecture for Intrusion Detection on Heterogeneous Wireless Sensor Networks: Hierarchical, Scalable and Dynamic Reconfigurable  

Directory of Open Access Journals (Sweden)

Full Text Available Networks protection against different types of attacks is one of most important posed issue into the network and information security domains. This problem on Wireless Sensor Networks (WSNs), in attention to their special properties, has more importance. Now, there are some of proposed solutions to protect Wireless Sensor Networks (WSNs) against different types of intrusions; but no one of them has a comprehensive view to this problem and they are usually designed in single-purpose; but, the proposed design in this paper has been a comprehensive view to this issue by presenting a complete Intrusion Detection Architecture (IDA). The main contribution of this architecture is its hierarchical structure; i.e. it is designed and applicable, in one, two or three levels, consistent to the application domain and its required security level. Focus of this paper is on the clustering WSNs, designing and deploying Sensor-based Intrusion Detection System (SIDS) on sensor nodes, Cluster-based Intrusion Detection System (CIDS) on cluster-heads and Wireless Sensor Network wide level Intrusion Detection System (WSNIDS) on the central server. Suppositions of the WSN and Intrusion Detection Architecture (IDA) are: static and heterogeneous network, hierarchical, distributed and clustering structure along with clusters' overlapping. Finally, this paper has been designed a questionnaire to verify the proposed idea; then it analyzed and evaluated the acquired results from the questionnaires.

Hossein Jadidoleslamy

2011-01-01

167

Evolving Wireless Sensor Network Behavior Through Adaptability Points in Middleware Architectures  

Directory of Open Access Journals (Sweden)

Full Text Available Reflection has been proven to be a powerful mechanism to address software adaptation in middleware architectures; however this concept requires that the middleware be open and that modification of all of its functionality and behavior be possible. This leads to systems which are difficult to understand and may quickly overwhelm developers. Safer and more understandable approaches use modeling and put forth a partial implementation of reflective principles while limiting the possible scope of modification, as with translucent middleware. We consider that given the resource constraints in a Wireless Sensor Network (WSNs) it is preferable to limit reflective features in order to conserve computational cycles and reduce network traffic. Additionally we do not believe all modifications lie within the concerns of the application developer and we introduce a separation of operational concerns that maps different modification responsibilities and levels of abstractions to different operational roles. We introduce a middleware architecture that provides strategy-controlled adaptability points; which are available to modify the behavior of the middleware's primary functionality. We have evaluated our approach through the implementation of a proof of concept prototype that supportsan industrial use case in the logistics domain and aneed-for-change scenario in the middleware's capacity planning functionality. Results demonstrate how changes in business requirements may be effectively supported through the introduction of adaptability points.

Pedro Javier del Cid; Daniel Hughes; Sam Michiels; Wouter Joosen

2011-01-01

168

An Object-Oriented Architecture for a Web-Based CAI System.  

Science.gov (United States)

This paper describes the design and implementation of an object-oriented World Wide Web-based CAI (Computer-Assisted Instruction) system. The goal of the design is to provide a flexible CAI/ITS (Intelligent Tutoring System) framework with full extendibility and reusability, as well as to exploit Web-based software technologies such as JAVA, ASP (a…

Nakabayashi, Kiyoshi; Hoshide, Takahide; Seshimo, Hitoshi; Fukuhara, Yoshimi

169

Bi-Fi: an embedded sensor/system architecture for REMOTE biological monitoring.  

UK PubMed Central (United Kingdom)

Wireless-enabled processor modules intended for communicating low-frequency phenomena (i.e., temperature, humidity, and ambient light) have been enabled to acquire and transmit multiple biological signals in real time, which has been achieved by using computationally efficient data acquisition, filtering, and compression algorithms, and interfacing the modules with biological interface hardware. The sensor modules can acquire and transmit raw biological signals at a rate of 32 kb/s, which is near the hardware limit of the modules. Furthermore, onboard signal processing enables one channel, sampled at a rate of 4000 samples/s at 12-bit resolution, to be compressed via adaptive differential-pulse-code modulation (ADPCM) and transmitted in real time. In addition, the sensors can be configured to filter and transmit individual time-referenced "spike" waveforms, or to transmit the spike height and width for alleviating network traffic and increasing battery life. The system is capable of acquiring eight channels of analog signals as well as data via an asynchronous serial connection. A back-end server archives the biological data received via networked gateway sensors, and hosts them to a client application that enables users to browse recorded data. The system also acquires, filters, and transmits oxygen saturation and pulse rate via a commercial-off-the-shelf interface board. The system architecture can be configured for performing real-time nonobtrusive biological monitoring of humans or rodents. This paper demonstrates that low-power, computational, and bandwidth-constrained wireless-enabled platforms can indeed be leveraged for wireless biosignal monitoring.

Farshchi S; Pesterev A; Nuyujukian PH; Mody I; Judy JW

2007-11-01

170

A web-based, run-time extensible architecture for interactive visualization and exploration of diverse data Nathan James Conklin  

UK PubMed Central (United Kingdom)

Information visualizations must often be custom programmed to support complex usertasks and database schemas. This is an expensive and time consuming effort, even whengeneral-purpose visualizations are utilized within the solution. This research introduces the Snapvisualization server and system architecture that addresses limitations of previous Snap-TogetherVisualization research and satisfies the need for flexibility in information visualizations. Anenhanced visualization model is presented that formalizes multiple-view visualization in terms ofthe relational data model. An extensible architecture is introduced that enables flexibleconstruction and component integration. It allows the integration of diverse data, letting usersspend less time massaging the data prior to visualization. The web-based server enablesuniversal access, easy distribution, and the ability to intermix and exploit existing components.This web-based software architecture provides a strong foundation for future multiple-viewvisualization development.AcknowledgementsThanks to Chris North. You have inspired me with creativity and filled me withenthusiasm towards this emerging field of information visualization. I appreciate your adviceand support, as well as your motivation to shoot for the stars. Thanks to Stephen Edwards, youhelped pushed me to excel both as a student and a teacher. Thanks to Naren Ramakrishnan, youhave motivated excellence in my graduate studies and I am very thankful.Special thanks to those people that were a big part of the Snap team! These contributionsare the work of an excellent team. Thanks to those who helped create both the ideas and thesoftware. Varun Saini, you have been wonderful to work with. I wish you the very best.Thanks to Kiran Indukuri and ...

Nathan James Conklin; Stephen Edwards; Naren Ramakrishnan

171

Increasing Mission Science Return Through Use of Spacecraft Autonomy and Sensor Webs: A Volcanology Example  

Science.gov (United States)

Mission science return is increased through use of onboard autonomy, and using disparate assets integrated into an autonomously-operating sensor web that can re-task these assets to rapidly obtain additional data. Software on spacecraft has been used to analyse data to detect dynamic events of high interest, such as on- going volcanic activity. This capability has been successfully demonstrated by the NASA New Millennium Program Autonomous Sciencecraft Experiment (ASE), on the Earth Observing 1 spacecraft in Earth-orbit [1-2]. The potential now exists for eruption parameters to be quantified onboard a spacecraft, using models that relate thermal emission to volumetric eruption rate. This promises a notification not only of on-going activity, but also the magnitude of the event, within a few hours of the original observation, a process that normally takes weeks. ASE/EO-1 is part of the JPL Volcano Sensor Web [3]. This autonomous system collates information of volcanic activity from numerous assets and retasks EO-1 to obtain observations as soon as practicable. The use of a ground-based planner allows rapid insertion or replacement of new observations, with no human intervention. Endusers are notified automatically by email. Spacecraft autonomy, involving automatic fault detection and mitigation, onboard processing of data, and replanning of observations, allows mission operations to break free from pre-ordained operations sequencing, necessary for studying dynamic volcanic processes on other bodies in the Solar System (e.g., Io and Enceladus). Onboard processing allows quantification of dynamic processes, improving both science content per returned byte and optimization of subsequent resource use. This work was carried out at the Jet Propulsion Laboratory-California Institute of Technology, under contract to NASA. [1] Chien, S. et al. (2004) The EO-1 Autonomous Science Agent, Proceedings of the 2004 Conferences on Autonomous Agents and Multi-agent Systems (AAMAS), New York City, USA, July 2004. [2] Davies, A. G. et al. (2006) Monitoring active volcanism with the Autonomous Sciencecraft Experiment (ASE) on EO-1, RSE, 101, 427-446. [3] Davies, A. G. et al., (2006) Sensor Web enables rapid response to volcanic activity, Eos, 87, 1, 1&5.

Davies, A. G.; Chien, S. A.; Castano, R.; Tran, D. Q.; Scharenbroich, L. J.

2006-12-01

172

Building a logical EHR architecture based on ISO 13606 standard and semantic web technologies.  

Science.gov (United States)

Among the existing patterns of EHR interoperability, the ISO 13606 standard is an important consideration. It is believed that the use of this norm, in conjunction with semantic technologies, may aid in the construction of a robust architecture, keeping in mind the challenges of semantic interoperability. The objective of this paper is to present a proposal for an EHR architecture, based on ISO 13606 and on the utilization of semantic technologies, for a real EHR scenario. In order to accomplish that, a real EHR scenario is described, as well as its main interoperability requirements and a candidate architecture is proposed to solve the presented challenges of interoperability. The ability of the ISO 13606 EHR reference model to accommodate the scenario was highlighted, together with the support provided by the use of the ontology specification languages--RDF and OWL--in respect to the maintenance of a controlled vocabulary. PMID:20841670

Santos, Marcelo R; Bax, Marcello P; Kalra, Dipak

2010-01-01

173

Building a logical EHR architecture based on ISO 13606 standard and semantic web technologies.  

UK PubMed Central (United Kingdom)

Among the existing patterns of EHR interoperability, the ISO 13606 standard is an important consideration. It is believed that the use of this norm, in conjunction with semantic technologies, may aid in the construction of a robust architecture, keeping in mind the challenges of semantic interoperability. The objective of this paper is to present a proposal for an EHR architecture, based on ISO 13606 and on the utilization of semantic technologies, for a real EHR scenario. In order to accomplish that, a real EHR scenario is described, as well as its main interoperability requirements and a candidate architecture is proposed to solve the presented challenges of interoperability. The ability of the ISO 13606 EHR reference model to accommodate the scenario was highlighted, together with the support provided by the use of the ontology specification languages--RDF and OWL--in respect to the maintenance of a controlled vocabulary.

Santos MR; Bax MP; Kalra D

2010-01-01

174

RoCoMAR: Robots' Controllable Mobility Aided Routing and Relay Architecture for Mobile Sensor Networks.  

UK PubMed Central (United Kingdom)

In a practical deployment, mobile sensor network (MSN) suffers from a low performance due to high node mobility, time-varying wireless channel properties, and obstacles between communicating nodes. In order to tackle the problem of low network performance and provide a desired end-to-end data transfer quality, in this paper we propose a novel ad hoc routing and relaying architecture, namely RoCoMAR (Robots' Controllable Mobility Aided Routing) that uses robotic nodes' controllable mobility. RoCoMAR repeatedly performs link reinforcement process with the objective of maximizing the network throughput, in which the link with the lowest quality on the path is identified and replaced with high quality links by placing a robotic node as a relay at an optimal position. The robotic node resigns as a relay if the objective is achieved or no more gain can be obtained with a new relay. Once placed as a relay, the robotic node performs adaptive link maintenance by adjusting its position according to the movements of regular nodes. The simulation results show that RoCoMAR outperforms existing ad hoc routing protocols for MSN in terms of network throughput and end-to-end delay.

Le DV; Oh H; Yoon S

2013-01-01

175

RoCoMAR: robots' controllable mobility aided routing and relay architecture for mobile sensor networks.  

UK PubMed Central (United Kingdom)

In a practical deployment, mobile sensor network (MSN) suffers from a low performance due to high node mobility, time-varying wireless channel properties, and obstacles between communicating nodes. In order to tackle the problem of low network performance and provide a desired end-to-end data transfer quality, in this paper we propose a novel ad hoc routing and relaying architecture, namely RoCoMAR (Robots' Controllable Mobility Aided Routing) that uses robotic nodes' controllable mobility. RoCoMAR repeatedly performs link reinforcement process with the objective of maximizing the network throughput, in which the link with the lowest quality on the path is identified and replaced with high quality links by placing a robotic node as a relay at an optimal position. The robotic node resigns as a relay if the objective is achieved or no more gain can be obtained with a new relay. Once placed as a relay, the robotic node performs adaptive link maintenance by adjusting its position according to the movements of regular nodes. The simulation results show that RoCoMAR outperforms existing ad hoc routing protocols for MSN in terms of network throughput and end-to-end delay.

Le DV; Oh H; Yoon S

2013-01-01

176

Lightweight Filter Architecture for Energy Efficient Mobile Vehicle Localization Based on a Distributed Acoustic Sensor Network  

Directory of Open Access Journals (Sweden)

Full Text Available The generic properties of an acoustic signal provide numerous benefits for localization by applying energy-based methods over a deployed wireless sensor network (WSN). However, the signal generated by a stationary target utilizes a significant amount of bandwidth and power in the system without providing further position information. For vehicle localization, this paper proposes a novel proximity velocity vector estimator (PVVE) node architecture in order to capture the energy from a moving vehicle and reject the signal from motionless automobiles around the WSN node. A cascade structure between analog envelope detector and digital exponential smoothing filter presents the velocity vector-sensitive output with low analog circuit and digital computation complexity. The optimal parameters in the exponential smoothing filter are obtained by analytical and mathematical methods for maximum variation over the vehicle speed. For stationary targets, the derived simulation based on the acoustic field parameters demonstrates that the system significantly reduces the communication requirements with low complexity and can be expected to extend the operation time considerably.

Keonwook Kim

2013-01-01

177

Lightweight filter architecture for energy efficient mobile vehicle localization based on a distributed acoustic sensor network.  

UK PubMed Central (United Kingdom)

The generic properties of an acoustic signal provide numerous benefits for localization by applying energy-based methods over a deployed wireless sensor network (WSN). However, the signal generated by a stationary target utilizes a significant amount of bandwidth and power in the system without providing further position information. For vehicle localization, this paper proposes a novel proximity velocity vector estimator (PVVE) node architecture in order to capture the energy from a moving vehicle and reject the signal from motionless automobiles around the WSN node. A cascade structure between analog envelope detector and digital exponential smoothing filter presents the velocity vector-sensitive output with low analog circuit and digital computation complexity. The optimal parameters in the exponential smoothing filter are obtained by analytical and mathematical methods for maximum variation over the vehicle speed. For stationary targets, the derived simulation based on the acoustic field parameters demonstrates that the system significantly reduces the communication requirements with low complexity and can be expected to extend the operation time considerably.

Kim K

2013-01-01

178

RoCoMAR: Robots' Controllable Mobility Aided Routing and Relay Architecture for Mobile Sensor Networks  

Science.gov (United States)

In a practical deployment, mobile sensor network (MSN) suffers from a low performance due to high node mobility, time-varying wireless channel properties, and obstacles between communicating nodes. In order to tackle the problem of low network performance and provide a desired end-to-end data transfer quality, in this paper we propose a novel ad hoc routing and relaying architecture, namely RoCoMAR (Robots' Controllable Mobility Aided Routing) that uses robotic nodes' controllable mobility. RoCoMAR repeatedly performs link reinforcement process with the objective of maximizing the network throughput, in which the link with the lowest quality on the path is identified and replaced with high quality links by placing a robotic node as a relay at an optimal position. The robotic node resigns as a relay if the objective is achieved or no more gain can be obtained with a new relay. Once placed as a relay, the robotic node performs adaptive link maintenance by adjusting its position according to the movements of regular nodes. The simulation results show that RoCoMAR outperforms existing ad hoc routing protocols for MSN in terms of network throughput and end-to-end delay.

Van Le, Duc; Oh, Hoon; Yoon, Seokhoon

2013-01-01

179

Lightweight filter architecture for energy efficient mobile vehicle localization based on a distributed acoustic sensor network.  

Science.gov (United States)

The generic properties of an acoustic signal provide numerous benefits for localization by applying energy-based methods over a deployed wireless sensor network (WSN). However, the signal generated by a stationary target utilizes a significant amount of bandwidth and power in the system without providing further position information. For vehicle localization, this paper proposes a novel proximity velocity vector estimator (PVVE) node architecture in order to capture the energy from a moving vehicle and reject the signal from motionless automobiles around the WSN node. A cascade structure between analog envelope detector and digital exponential smoothing filter presents the velocity vector-sensitive output with low analog circuit and digital computation complexity. The optimal parameters in the exponential smoothing filter are obtained by analytical and mathematical methods for maximum variation over the vehicle speed. For stationary targets, the derived simulation based on the acoustic field parameters demonstrates that the system significantly reduces the communication requirements with low complexity and can be expected to extend the operation time considerably. PMID:23979482

Kim, Keonwook

2013-08-23

180

Evaluating Galois Counter Mode in Link Layer Security Architecture for Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Due to the severe resource constraints in the Wireless Sensor Networks (WSNs), the security protocolstherein, should be designed to optimize the performance maximally. On the other hand a block cipher andthe mode of operation in which it operates, play a vital role in determining the overall efficiency of asecurity protocol. In addition, when an application demands confidentiality and message integrity, theoverall efficiency of a security protocol can be improved by using the Authenticated Encryption (AE)block cipher mode of operation as compared to the conventional sequential encryption andauthentication. Amongst the AE block cipher modes, the Galois Counter mode (GCM) is the latestrecommended AE mode by the NIST. In this paper, we attempt at evaluating the performance of the GCMmode in the link layer security protocol for a WSN viz. TinySec and compare it with the defaultconventional block cipher modes of operation used therein. To the best of our knowledge ours is the firstexperimental evaluation of Galois Counter Mode with Advanced Encryption Standard Cipher at the linklayer security architecture for WSNs.

Vivaksha Jariwala; D. C. Jinwala

2010-01-01

 
 
 
 
181

Adaptation of Web Services to the Context Based on Workflow: Approach for Self-Adaptation of Service-Oriented Architectures to the Context  

Directory of Open Access Journals (Sweden)

Full Text Available The emergence of Web services in the information space, as well as the advanced technology of SOA, givetremendous opportunities for users in an ambient space or distant, empowerment and organizations invarious fields application, such as geolocation, E-learning, healthcare, digital government, etc.. In fact,Web services are a solution for the integration of distributed information systems, autonomous,heterogeneous and self-adaptable to the context. However, as Web services can evolve in a dynamicenvironment in a well-defined context and according to events automatically, such as time, temperature,location, authentication, etc.. We are interested in improving their SOA to empower the Web services to beself adaptive contexts. In this paper, we propose a new trend of self adaptability of Web services context.Then applying these requirements in the architecture of the platform of adaptability to context “WComp”,by integrating the workflow. Our work is illustrated by a case study of authentication.

Faical Felhi; Jalel Akaichi

2012-01-01

182

DISTRIBUTED LOCATION BASED PROXY ARCHITECTURE FOR VIDEO LEARNING PORTAL USING WEB PROGRAMMING TECHNOLOGIES  

Directory of Open Access Journals (Sweden)

Full Text Available This project describes architecture for making media on demand services for e-learning portals as efficient as possible by making use of distributed proxy servers. The proxy servers may be kept at different locations and the databases which they access can also be distributed on different locations or different machines. The specialty of this architecture is that it uses the location of the client demanding the media as a major factor in determining which proxy server will respond to the request. This job is done by the Proxy determining logic which is a unique server for the whole architecture and which plays a central role in the functioning of the same. All the proxy servers use caching techniques and there is a central Backup server that ensures service continuity in case the main server fails due to any reason like power cut. The idea behind keeping the proxy determining logic and the location based proxy servers is that the proxy server nearest to the client will not only be having the shortest route to the client but also the chances of interruption of the service will be low. Due to lower physical distance the number of routers and gateways between the Thus the whole architecture ensures that the client gets his video/audio as smoothly, as quickly and using as low net bandwidth as possible.

Rasoor Rajesh1 Rajesh

2011-01-01

183

The implementation of common object request broker architecture (CORBA) for controlling robot arm via web  

International Nuclear Information System (INIS)

[en] This paper presents the employment of the Common Object Request Broker Architecture (CORBA) technology in the implementation of our distributed Arm Robot Controller (ARC). CORBA is an industrial standard architecture based on distributed abstract object model, which is developed by Object Management Group (OMG). The architecture consists of five components i.e. Object Request Broker (ORB), Interface Definition Language (IDL), Dynamic Invocation Interface (DII), Interface Repositories (IR) and Object adapter (OA). CORBA objects are different from typical programming objects in three ways i.e. they can be executed on any platform, located anywhere on the network and written in any language that supports IDL mapping. In the implementation of the system, 5 degree of freedom (DOF) arm robot RCS 6.0 and Java as a programming mapping to the CORBA IDL. By implementing this architecture, the objects in the server machine can be distributed over the network in order to run the controller. the ultimate goal for our ARC system is to demonstrate concurrent execution of multiple arm robots through multiple instantiations of distributed object components. (Author)

2001-01-01

184

Real-Time Content Transformations in a Web Service Based Delivery Architecture for Geographic Information  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The proliferation of location-aware consumer applications is increasing the demand for Web service-based delivery of geospatial content. Significant national and European-wide initiatives have been launched to develop Spatial Data Infrastructures (SDI) aiming at more efficient dissemination of publi...

Lehto, Lassi

185

Observing Iceland's Eyjafjallajökull 2010 eruptions with the autonomous NASA Volcano Sensor Web  

Science.gov (United States)

24 March and 5 June 2010, the Hyperion hyperspectral imager and Advanced Land Imager (ALI) on NASA's Earth Observing 1 (EO-1) spacecraft obtained an unprecedented sequence of 50 observation pairs of the eruptions at Fimmvörðuháls and Eyjafjallajökull, Iceland. This high acquisition rate was possible only through the use of data flow streamlined by using the autonomously operating NASA Volcano Sensor Web (VSW). The VSW incorporates notifications of volcanic activity from multiple sources to retask EO-1 and process Hyperion data to extract eruption parameters from high spatial and spectral resolution visible and short-wavelength infrared data. Physical changes in eruption style and magnitude were charted as the eruptions ran their course. Rapid data downlink and automatic data-processing algorithms generated a variety of products which are compared with estimates from ground-based observations and post-eruption in situ measurements. Estimates of effusion rate from heat loss measurements underestimate actual effusion rate (while still following broad eruption rate trends) but are closer to in situ estimates for effusive eruptions (Fimmvörðuháls) than explosive, ash-rich eruptions (Eyjafjallajökull). During the later stages of the 2010 eruption, VSW-generated products were rapidly delivered to end-users in Iceland to aid in the assessment of risk and hazard. The success of the VSW led to Icelandic Meteorological Office (IMO) in situ sensors being incorporated into the VSW, and in May 2011 an IMO seismic alert autonomously triggered EO-1 observations of a new eruption at Grímsvötn volcano. Finally, the VSW demonstrates an autonomy-driven, multi-asset, spacecraft retasking and data processing system that maximizes science return, a desirable capability for future NASA missions.

Davies, Ashley Gerard; Chien, Steve; Doubleday, Joshua; Tran, Daniel; Thordarson, Thorvaldur; Gudmundsson, Magnús T.; HöSkuldsson, ÁRmann; Jakobsdóttir, Steinunn S.; Wright, Robert; Mandl, Daniel

2013-05-01

186

Design of Enterprise and Web Application Architecture for Secure Information System  

Directory of Open Access Journals (Sweden)

Full Text Available In this paper we design and provide the tempering of systems can cause huge damage and hence it becomes extremely critical to understand all the aspects around avenues of security threats as well as understand the possible solutions to safeguard and secure the information flow. A Security Architecture Blueprint is must to bring focus to the key areas of concern for the enterprise, highlighting decision criteria and context for each domain. Security services provide confidentiality, integrity, and availability services for the platform. Security services are implemented as protection services, such as authentication and authorization, detection services, such as monitoring and auditing, and response services, such as incident response and forensics.

Dr. Banta Singh Jangra

2012-01-01

187

Apoidea: A Decentralized Peer-to-Peer Architecture for Crawling the World Wide Web  

UK PubMed Central (United Kingdom)

This paper describes a decentralized peer-to-peer model for building a Web crawler. Most ofthe current systems use a centralized client-server model, in which the crawl is done by one or moretightly coupled machines, but the distribution of the crawling jobs and the collection of crawled resultsare managed in a centralized system using a centralized URL repository. Centralized solutions are knownto have problems like link congestion, being a single point of failure, and expensive administration. Itrequires both horizontal and vertical scalability solutions to manage Network File Systems (NFS) andload balancing DNS and HTTP requests.

Aameek Singh; Mudhakar Srivatsa; Ling Liu; Todd Miller

188

Apoidea: A Decentralized Peer-to-Peer Architecture for Crawling the World Wide Web  

UK PubMed Central (United Kingdom)

This paper describes a decentralized peer-to-peer model for building a Web crawler. Most of thecurrent systems use a centralized client-server model, in which the crawl is done by one or more tightly coupledmachines, but the distribution of the crawling jobs and the collection of crawled results are managed in a centralizedsystem using a centralized URL repository. Centralized solutions are known to have problems like linkcongestion, being a single point of failure, and expensive administration. It requires both horizontal and verticalscalability solutions to manage Network File Systems (NFS) and load balancing DNS and HTTP requests.

Aameek Singh; Mudhakar Srivatsa; Ling Liu; Todd Miller

189

Web 2.0 systems supporting childhood chronic disease management: A pattern language representation of a general architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background Chronic disease management is a global health concern. By the time they reach adolescence, 10–15% of all children live with a chronic disease. The role of educational interventions in facilitating adaptation to chronic disease is receiving growing recognition, and current care policies advocate greater involvement of patients in self-care. Web 2.0 is an umbrella term for new collaborative Internet services characterized by user participation in developing and managing content. Key elements include Really Simple Syndication (RSS) to rapidly disseminate awareness of new information; weblogs (blogs) to describe new trends, wikis to share knowledge, and podcasts to make information available on personal media players. This study addresses the potential to develop Web 2.0 services for young persons with a chronic disease. It is acknowledged that the management of childhood chronic disease is based on interplay between initiatives and resources on the part of patients, relatives, and health care professionals, and where the balance shifts over time to the patients and their families. Methods Participatory action research was used to stepwise define a design specification in the form of a pattern language. Support for children diagnosed with diabetes Type 1 was used as the example area. Each individual design pattern was determined graphically using card sorting methods, and textually in the form Title, Context, Problem, Solution, Examples and References. Application references were included at the lowest level in the graphical overview in the pattern language but not specified in detail in the textual descriptions. Results The design patterns are divided into functional and non-functional design elements, and formulated at the levels of organizational, system, and application design. The design elements specify access to materials for development of the competences needed for chronic disease management in specific community settings, endorsement of self-learning through online peer-to-peer communication, and systematic accreditation and evaluation of materials and processes. Conclusion The use of design patterns allows representing the core design elements of a Web 2.0 system upon which an 'ecological' development of content respecting these constraints can be built. Future research should include evaluations of Web 2.0 systems implemented according to the architecture in practice settings.

Timpka Toomas; Eriksson Henrik; Ludvigsson Johnny; Ekberg Joakim; Nordfeldt Sam; Hanberger Lena

2008-01-01

190

From MASTER-Web to AGATHE: the evolution of an architecture for manipulating information over the Web using ontologies - DOI: 10.3395/reciis.v2i1.137en  

Directory of Open Access Journals (Sweden)

Full Text Available This article presents two architectures for information gathering systems on restricted Web domains, for example the academic or the biologic domain. This text processing is based on the use of domain-related ontologies employing them as a well-defined and understandable semantic model for the software. If, on one hand, the solution here presented cannot be scaled to the entire Web, on the other hand, the offered services are more versatile and precise and able to combine information with well-defined relationships distributed over the Web. The presented systems are still able to draw inferences about the information present in the Web about these domains. As a proof of concept, we present experiments with good results in two distinct domains, showing the feasibility and portability between domains of the presented solution besides presenting a high degree of reuse during the portability.

Fred Freitas; Luciano Cabral; Rinaldo Lima; Eunice Palmeira; Guilherme Bittencourt; Bernard Espinasse; Sébastien Fournier

2008-01-01

191

CIB: an improved communication architecture for real-time monitoring of aerospace materials, instruments, and sensors on the ISS.  

UK PubMed Central (United Kingdom)

The Communications Interface Board (CIB) is an improved communications architecture that was demonstrated on the International Space Station (ISS). ISS communication interfaces allowing for real-time telemetry and health monitoring require a significant amount of development. The CIB simplifies the communications interface to the ISS for real-time health monitoring, telemetry, and control of resident sensors or experiments. With a simpler interface available to the telemetry bus, more sensors or experiments may be flown. The CIB accomplishes this by acting as a bridge between the ISS MIL-STD-1553 low-rate telemetry (LRT) bus and the sensors allowing for two-way command and telemetry data transfer. The CIB was designed to be highly reliable and radiation hard for an extended flight in low Earth orbit (LEO) and has been proven with over 40?months of flight operation on the outside of ISS supporting two sets of flight experiments. Since the CIB is currently operating in flight on the ISS, recent results of operations will be provided. Additionally, as a vehicle health monitoring enabling technology, an overview and results from two experiments enabled by the CIB will be provided. Future applications for vehicle health monitoring utilizing the CIB architecture will also be discussed.

Krasowski MJ; Prokop NF; Flatico JM; Greer LC; Jenkins PP; Neudeck PG; Chen L; Spina DC

2013-01-01

192

A Generic Architecture for User Modeling Systems and Adaptive web services  

UK PubMed Central (United Kingdom)

User Modeling is a technology that addresses theneed to personalize information services on theInternet. This requirement is as acute fordeveloping intelligent information services as forimprovement and value-addition in E-commerceinfrastructure. Past work in the area lacks arobustly defined and generally applicable design ofa system that will enable end-users to accesspersonalized information. This paper starts bygiving an overview of the field of User Modeling,and presents a generic architecture of a UserModeling system, which can then be adapted foruse in various application domains. The novelapproach adopted here uses a strong HeuristicsModel for developing a user model, thus adding alevel of intelligence to otherwise `dumb' contentcustomization.1.

Amit Sharma

193

Security Architecture Framework and Secure Routing Protocols in Wireless Sensor Networks - Survey  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless sensor networks emerging has increased now a days , therefore the need foreffective security mechanisms is essential. Because sensor networks may interact with sensitive data andoperate in hostile unattended environments, it is imperative that these security concerns be addressedfrom the beginning of the system design. we survey the major topics in wireless sensor network securityarchitecture framework includes the requirements in the sensor security, classify many of the currentattacks, listing out their corresponding defensive measures that can be applied, and finally theclassification of secure routing protocols, its design issues and their comparison.

Md Abdul Azeem; Khaleel-ur-Rahman khan; A.V.Pramod

2011-01-01

194

Development of web based courseware and digital education platform architecture for nuclear reactor operation experiment  

Energy Technology Data Exchange (ETDEWEB)

In this research, two kinds of work were performed for the knowledge base structure of university education environment. The first work is to develop a web-based courseware of 'reactor experiment'. Eight chapter were designed - guide and introduction, system tour on nuclear power plant, reactor kinetics theory, application of reactor kinetics, criticality measurement experiment, reactivity measurement, load-following operation transient, reactor operation experiment. At this point, 5 chapters were completed and 3 chapters are under construction with expectation of near-term completion. A html courseware files were operated on PC LINUX and on-line login can be done on the site 'http://cylex.kyunghee.ac.kr'. Each chapter consist of lecture note, lecture slides, self-diagnostic quiz, pass/fail exam and cyber simulator. The second task of this project was to build a cyber lecture and experiment space(CyLEX) to operate a developed courseware on it. 30 seats classroom was completed in the engineering bldg at Kyung Hee University. A advanced space - CyLEX was equipped with computers, electronic board, beam projector, digital camera OHP, etc. Courseware was loaded on the server and opened to public on 24 hour base. Another function of classroom is a capability of lecturer to monitor and command of student computers. Development on system was focused on operation for on-site lecture with intra-net. However, remote on-line class for inter-net can be open to the public under the limitation of transmission speed via internet gateways. 40 figs., 1 tabs. (Author)

Kim, M. H.; Lee, W. K.; Kim, S. N.; Suh, D. Y. [Kyung Hee Univ., Seoul (Korea)

2001-01-01

195

Optical Flow in a Smart Sensor Based on Hybrid Analog-Digital Architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The purpose of this study is to develop a motion sensor (delivering optical flow estimations) using a platform that includes the sensor itself, focal plane processing resources, and co-processing resources on a general purpose embedded processor. All this is implemented on a single device as a SoC (...

Pablo Guzmán; Javier Díaz; Rodrigo Agís; Eduardo Ros

196

A Secure Web Service-based Platform for Wireless Sensor Network Management and Interrogation  

Digital Repository Infrastructure Vision for European Research (DRIVER)

A Wireless Sensor Network (WSN) is composed of small, low cost and low energy consumption devices called sensors. Those sensors are deployed in a monitored area. They capture measurements related to the monitored phenomenon (temperature, humidity...) and send them through a multi-hop routing to a si...

Amokrane, Ahmed; Challal, Yacine; Balla, Amar

197

Architecture of optical fiber sensor for the simultaneous measurement of axial and radial strains  

Science.gov (United States)

The aim of this paper is to investigate the ability to measure simultaneously the axial and radial strain with a single optical fiber sensor. The discussion begins with the analytical study of a cylinder subjected to pure tensile strain and thermal load. We emphasize the necessity of measuring the radial strain in order to determine the axial strain of an embedded sensor with accuracy. Then, we describe a few sensors able to measure axial and radial strains and study their efficiency. The conclusion is that the best structure is made of the juxtaposition of a short and a long period grating.

Leduc, Dominique; Lecieux, Yann; Morvan, Pierre-Antoine; Lupi, Cyril

2013-07-01

198

Using elements of game engine architecture to simulate sensor networks for eldercare.  

Science.gov (United States)

When dealing with a real time sensor network, building test data with a known ground truth is a tedious and cumbersome task. In order to quickly build test data for such a network, a simulation solution is a viable option. Simulation environments have a close relationship with computer game environments, and therefore there is much to be learned from game engine design. In this paper, we present our vision for a simulated in-home sensor network and describe ongoing work on using elements of game engines for building the simulator. Validation results are included to show agreement on motion sensor simulation with the physical environment. PMID:19964691

Godsey, Chad; Skubic, Marjorie

2009-01-01

199

System Architecture of HatterHealthConnect: An Integration of Body Sensor Networks and Social Networks to Improve Health Awareness  

Directory of Open Access Journals (Sweden)

Full Text Available Over the last decade, the demand for efficient healthcare monitoring has increased and forced the healthand wellness industry to embrace modern technological advances. Body Sensor Networks, or BSNs, canremotely collect users data and upload vital statistics to servers over the Internet. Advances in wirelesstechnologies such as cellular devices and Bluetooth increase the mobility users experience while wearing abody sensor network. When connected by the proper framework, BSNs can efficiently monitor and recorddata while minimizing the energy expenditure of nodes in the BSN. Social networking sites play a large rolein the aggregation and sharing of data between many users. Connecting a BSN to a social network createsthe unique ability to share health related data with other users through social interaction. In this research,we present an integration of BSNs and social networks to establish a community promoting well being andgreat social awareness. We present the system architecture; both hardware and software, of a prototypeimplementation using Zephyr HxM heart monitor, Intel-Shimmer EMG senor and a Samsung Captivatesmart phone. We provide implementation details for the design on the base station, the database server andthe Facebook application. We illustrate how the Android application was designed with both functionalityand user perspective in mind that resulted in an easy to use system. This prototype can be used in multiplehealth related applications based on the type of sensors used.

Hala ElAarag; David Bauschlicher; Steven Bauschlicher

2013-01-01

200

Marine vehicle sensor network architecture and protocol designs for ocean observation.  

UK PubMed Central (United Kingdom)

The micro-scale and meso-scale ocean dynamic processes which are nonlinear and have large variability, have a significant impact on the fisheries, natural resources, and marine climatology. A rapid, refined and sophisticated observation system is therefore needed in marine scientific research. The maneuverability and controllability of mobile sensor platforms make them a preferred choice to establish ocean observing networks, compared to the static sensor observing platform. In this study, marine vehicles are utilized as the nodes of mobile sensor networks for coverage sampling of a regional ocean area and ocean feature tracking. A synoptic analysis about marine vehicle dynamic control, multi vehicles mission assignment and path planning methods, and ocean feature tracking and observing techniques is given. Combined with the observation plan in the South China Sea, we provide an overview of the mobile sensor networks established with marine vehicles, and the corresponding simulation results.

Zhang S; Yu J; Zhang A; Yang L; Shu Y

2012-01-01

 
 
 
 
201

iRide: A Cooperative Sensor and IP Multimedia Subsystem Based Architecture and Application for ITS Road Safety  

Science.gov (United States)

In this paper we present iRide (intelligent ride), an IP Multimedia Subsystem (IMS) application for warning drivers about hazardous situations on the road. iRide takes real-time information about road conditions and traffic situations from a wireless sensor network installed directly in the road surface. Upon logging to the iRide system, users start to receive periodic updates about the situation on the road along their route ahead. iRide is able to predict hazardous situations like slippery surface or dangerous distance to the nearest car and help drivers avoid accidents. We describe the service and the supporting network architecture of iRide. We discuss the major challenges associated with designing an IMS application for ITS, an intelligent transport system. Having a prototype implementation working on a small scale, we take it to the next step to perform system dimensioning and then verify the feasibility of having such a system using OPNET simulations.

Elkotob, Muslim; Osipov, Evgeny

202

Architectural Model of Localization in Multi-Scale Communication for Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available There are several range-based localization algorithms that identify sensors positions for different wireless sensor networks. In this paper we propose the approach that highlights a new method of localization scheme to achieve high localization accuracy in the presence of radio irregularity and obstacles effects for wireless sensor networks. We present the evaluation of complex localization scenario, by applying convex localization estimation algorithm with possible orientation of obstacle using Euclidean and Interior point algorithms for non-ideal transmission networks. It has been observed in the simulation results that the proposed scheme significantly improve the localization accuracy. The range-free localization algorithms evaluate the node ranging error accuracy in anisotropic networks to solve the localization inequalities problem when the feasible set is empty. Study demonstrates the simulation results for the effectiveness of this algorithm. Furthermore, this scheme evaluate infeasible points caused by a complex radio various rigid statistical analysis to validate the results.

S Swapna Kumar; Dr M. Nanda Kumar; Dr V.S Sheeba

2011-01-01

203

Architecture of optical sensor for recognition of multiple toxic metal ions from water.  

Science.gov (United States)

Here, we designed novel optical sensor based on the wormhole hexagonal mesoporous core/multi-shell silica nanoparticles that enabled the selective recognition and removal of these extremely toxic metals from drinking water. The surface-coating process of a mesoporous core/double-shell silica platforms by several consequence decorations using a cationic surfactant with double alkyl tails (CS-DAT) and then a synthesized dicarboxylate 1,5-diphenyl-3-thiocarbazone (III) signaling probe enabled us to create a unique hierarchical multi-shell sensor. In this design, the high loading capacity and wrapping of the CS-DAT and III organic moieties could be achieved, leading to the formation of silica core with multi-shells that formed from double-silica, CS-DAT, and III dressing layers. In this sensing system, notable changes in color and reflectance intensity of the multi-shelled sensor for Cu(2+), Co(2+), Cd(2+), and Hg(2+) ions, were observed at pH 2, 8, 9.5 and 11.5, respectively. The multi-shelled sensor is added to enable accessibility for continuous monitoring of several different toxic metal ions and efficient multi-ion sensing and removal capabilities with respect to reversibility, selectivity, and signal stability. PMID:23856314

Shenashen, M A; El-Safty, S A; Elshehy, E A

2013-06-18

204

Composite Design Pattern for Feature Oriented Service Injection and Composition of Web Services for Distributed Computing Systems with Service Oriented Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available With the advent of newly introduced programming models like Feature-Oriented Programming (FOP), we feel that it will be more flexible to include the new service invocation function into the service providing server as a Feature Module for the self-adaptive distributed systems. A composite design patterns shows a synergy that makes the composition more than just the sum of its parts which leads to ready-made software architectures. In this paper we describe the amalgamation of Visitor and Case-Based Reasoning Design Patterns to the development of the Service Invocation and Web Services Composition through SOA with the help of JWS technologies and FOP. As far as we know, there are no studies on composition of design patterns for self adaptive distributed computing domain. We have provided with the sample code developed for the application and simple UML class diagram is used to describe the architecture.

Vishnuvardhan Mannava; T. Ramesh

2012-01-01

205

Energy Efficient Security Architecture for Wireless BioMedical Sensor Networks  

CERN Multimedia

Latest developments in VLSI, wireless communications, and biomedical sensing devices allow very small, lightweight, low power, intelligent sensing devices called biosensors. A set of these devices can be integrated into a Wireless Biomedical Sensor Network (WBSN), a new breakthrough technology used in telemedicine for monitoring the physiological condition of an individual. The biosensor nodes in WBSN has got resource limitations in terms of battery lifetime, CPU processing capability, and memory capacity. Replacement or recharging of batteries on thousands of biosensor nodes is quiet difficult or too costly. So, a key challenge in wireless biomedical sensor networks is the reduction of energy and memory consumption. Considering, the sensitivity of information in WBSN, we must provide security and patient privacy, as it is an important issue in the design of such systems. Hence this paper proposes an energy efficient security protocol for WBSN where security is provided to the physiological data, which is bei...

Mukesh, Rajeswari; Bharathi, V Subbiah

2009-01-01

206

A solution for parallel network architectures applied to network defense appliances and sensors  

Science.gov (United States)

Network defense has more technologies available for purchase today than ever before. As the number of threats increase, organizations are deploying multiple defense technologies to defend their networks. For instance, an enterprise network boundary often implements multiple network defense appliances, some with overlapping capabilities (e.g., firewalls, IDS/IPS, DNS Defense). These appliances are applied in a serial fashion to create a chain of network processing specifically designed to drop bad traffic from the network. In these architectures, once a packet is dropped by an appliance subsequent appliances do not process it. This introduces significant limitations; (1) Stateful appliances will maintain an internal state which differs from network reality; (2) The network manager cannot determine, or unit test, how each appliance would have treated each packet; (3) The appliance "votes" cannot be combined to achieve higherlevel functionality. To address these limitations, we have developed a novel, backwards-compatible Parallel Architecture for Network Defense Appliances (PANDA). Our approach allows every appliance to process all network traffic and cast a vote to drop or allow each packet. This "crowd-sourcing" approach allows the network designer to take full advantage of each appliance, understand how each appliance is behaving, and achieve new collaborative appliance behavior.

Naber, Eric C.; Velez, Paul G.; Johal, Amanpreet S.

2012-05-01

207

Applications and methods utilizing the Simple Semantic Web Architecture and Protocol (SSWAP) for bioinformatics resource discovery and disparate data and service integration  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background Scientific data integration and computational service discovery are challenges for the bioinformatic community. This process is made more difficult by the separate and independent construction of biological databases, which makes the exchange of data between information resources difficult and labor intensive. A recently described semantic web protocol, the Simple Semantic Web Architecture and Protocol (SSWAP; pronounced "swap") offers the ability to describe data and services in a semantically meaningful way. We report how three major information resources (Gramene, SoyBase and the Legume Information System [LIS]) used SSWAP to semantically describe selected data and web services. Methods We selected high-priority Quantitative Trait Locus (QTL), genomic mapping, trait, phenotypic, and sequence data and associated services such as BLAST for publication, data retrieval, and service invocation via semantic web services. Data and services were mapped to concepts and categories as implemented in legacy and de novo community ontologies. We used SSWAP to express these offerings in OWL Web Ontology Language (OWL), Resource Description Framework (RDF) and eXtensible Markup Language (XML) documents, which are appropriate for their semantic discovery and retrieval. We implemented SSWAP services to respond to web queries and return data. These services are registered with the SSWAP Discovery Server and are available for semantic discovery at http://sswap.info. Results A total of ten services delivering QTL information from Gramene were created. From SoyBase, we created six services delivering information about soybean QTLs, and seven services delivering genetic locus information. For LIS we constructed three services, two of which allow the retrieval of DNA and RNA FASTA sequences with the third service providing nucleic acid sequence comparison capability (BLAST). Conclusions The need for semantic integration technologies has preceded available solutions. We report the feasibility of mapping high priority data from local, independent, idiosyncratic data schemas to common shared concepts as implemented in web-accessible ontologies. These mappings are then amenable for use in semantic web services. Our implementation of approximately two dozen services means that biological data at three large information resources (Gramene, SoyBase, and LIS) is available for programmatic access, semantic searching, and enhanced interaction between the separate missions of these resources.

Nelson Rex T; Avraham Shulamit; Shoemaker Randy C; May Gregory D; Ware Doreen; Gessler Damian DG

2010-01-01

208

Architecture of poly(o-phenylenediamine)–Ag nanoparticle composites for a hydrogen peroxide sensor  

International Nuclear Information System (INIS)

[en] Graphical abstract: Schematic representation of the formation process of AgNPs/PoPD/GCE via a two-step procedure consisting of electropolymerization of o-PD and electrodeposition of AgNPs and their application in H2O2 detection. Highlights: ? o-Phenylenediamine (o-PD) was electropolymerized on a glassy carbon electrode (GCE). ? The conductive PoPD film was three-dimensional (3D) porous structure. ? Ag NPs formed by electrodepositing and uniformly dispersed on the 3D PoPD film. ? AgNPs/PoPD/GCE displayed good electrocatalytic activity to the reduction of H2O2. - Abstract: A novel strategy to fabricate a hydrogen peroxide (H2O2) sensor was developed by electrodepositing Ag nanoparticles (AgNPs) on a poly(o-phenylenediamine) (PoPD) film modified glassy carbon electrode (GCE). Firstly, the o-phenylenediamine was polymerized on a GCE by potential cycling to produce PoPD film. Then the AgNPs were electrodeposited on the PoPD film to form AgNPs/PoPD/GCE. The morphology of the electropolymerized PoPD film and the electrodeposited AgNPs were characterized by atomic force microscopy. The results showed the PoPD film was porous and the AgNPs dispersed uniformly on the PoPD film. Cylic voltammetry and amperometry were used to evaluate electrocatalytic properties of the AgNPs/PoPD/GCE. The electrode displayed good electrocatalytic activity in the reduction of H2O2 and could be used as a sensor for H2O2 detection. The sensor exhibited fast amperometric response to H2O2 with high selectivity, good reproducibility and stability. The linear range was 6.0 ?M to 67.3 mM with a detection limit of 1.5 ?M. Thus, it is considered to be an ideal candidate for practical application.

2012-01-15

209

Development of parallel architectures for sensor array-processing algorithms. Semi-Annual report  

Energy Technology Data Exchange (ETDEWEB)

The high resolution direction of arrival (DOA) estimation has been an important area of research for a number of years. Many researchers have developed a variety of algorithms to estimate the direction of arrival. Another important aspect of the DOA estimation area is the development of high speed hardware capable of computing the DOA in real time. In this research the authors have first focussed on the development of parallel architecture for multiple signal classification (MUSIC) and estimation of signal parameters by rotational invariance technique (ESPRIT) algorithms for the narrow band sources. These algorithms are substituted with computationally efficient modules and converted to pipelined and parallel algorithms. For example one important computation of eigendecomposition of the covariance matrix has been performed using Householders transformations and QR method.

Jamali, M.M.; Kwatra, S.C.; Djoudi, A.; Sheelvant, R.; Rao, M.

1991-08-01

210

Hardware-in-the-loop and Parallel Simulation Architecture for Wireless Sensor Network  

Directory of Open Access Journals (Sweden)

Full Text Available Discrete event-based simulation is commonly used to evaluate research on Wireless Sensor Networks (WSNs). However, highly accurate simulation models are required in recent advances on wireless communication technology, which results in a steep increase in simulation complexity and runtime. The contributions of this paper for the are twofold, one is to present a general layer structure for hardware-in-the-loop emulation and WSN simulation embedded with implementation of models, such as energy model and link mode, to introduce the distributed nodes into the simulation framework; the other is to build a parallelized simulation based on multi-processor computers as the de-facto default hardware platform and powerful private computing clusters to mirror the real WSN more closely. The work in this paper is realized and used to simulate industrial WSNs for describing and verifying the detail and methodology of WSNs.

Shihong Duan; Yadong Wan; Peng Meng; Qin Wang

2013-01-01

211

Architectural solutions of conformal network-centric staring-sensor systems with spherical field of view  

CERN Multimedia

The article presents the concept of network-centric conformal electro-optical systems construction with spherical field of view. It discusses abstract passive distributed electro-optical systems with focal array detectors based on a group of moving objects distributed in space. The system performs conformal processing of information from sensor matrix in a single event coordinate-time field. Unequivocally the construction of the systems which satisfy the different criteria of optimality is very complicated and requires special approaches to their development and design. The paper briefly touches upon key questions (in the authors' opinion) in the synthesis of such systems that meet different criteria of optimality. The synthesis of such systems is discussed by authors with the systematic and synergy approaches.

Makarenko, A V

2011-01-01

212

A Low Cost, Online, Computer Controlled Robot Architecture Using a CCTV Network as Sensors  

Directory of Open Access Journals (Sweden)

Full Text Available An important deterrent in deployment of robots in factories across the globe is the cost involved. A rather large part of that cost is the sensors which are also very unreliable and least robust. This paper proposes a cheaper, simpler and more dynamic robot prototype by using the factory’s existing CCTV cameras as the primary sensing equipment. Image Processing and total control of the robot(s) is handled by a computer. Using a server-client model, the robot(s) can also be controlled online. The software for the prototype was developed in MATLAB. This system is easily reprogrammable and deployable in a vast range of situations.

Abhinav Gupta; Akhil Piplani; Shailendra Mahani

2007-01-01

213

Architecture and Implementation of Real Time Vehicle Tracking System Using Wireless, Sensor Devices and Google Maps API  

Directory of Open Access Journals (Sweden)

Full Text Available The integration of different technologies potentially provides support to wide variety of applications and systems with vastly varying requirements and characteristics. Vehicle tracking system is one of such applications possible by embedding wireless sensor devices on the vehicles. The motor carrier industry has been investing in and implementing vehicle tracking, for a number of reasons, particularly the increase in efficiency achieved through better management of both personnel (drivers) and assets (trucks or, as they are known, tractors; cargo loads; and trailers). Recently, Vehicle Tracking Systems (VTS) are developed and deployed in numerous environments. These systems are capable of transmitting vehicle’s location information and other custom parameters in real time. In these systems, the device installed in the vehicle can transmit the location information, speed of the vehicle at that particular instance, total kilometer run of the vehicle, ignition status, battery status and many other custom parameters in real time to a remote data centre using SDCP protocol. In this paper, we present the design and implementation of a real time VTS that incorporates a hardware device installed in the vehicle and a remote data center with tracking sever and a web application with Google Maps API to depict the trail of the vehicle.

Khizar Ahmed Syed; Kiran Kumar Sreenivasiah; S. M. Ahmed; Shiva Kumar

2012-01-01

214

Network Architecture and Performance Analysis of MULTI-OLT PON for FTTH and Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available An integrated fiber-to-the-homes (FTTHs) and wireless sensor network (WSN) provides a cost-effective solution to build up an immaculate ubiquitous-City (U-city). The key objectives of effective convergence of FTTH and WSN are less computational complexity for data packet processing, low installation cost, and good quality of services. In this paper, we introduce an integrated network structure of multi-optical line terminal (multi-OLT) passive optical network (PON) which can accommodate multiple service providers in a single PON. A modified version of interleaved polling algorithm is proposed for scheduling of control messages from multiple OLTs in a single network. We also provide detailed numerical analysis of cycle time variation, successive grant scheduling time, and average packet delay for both uniform and non-uniform traffic loads generated by each ONU, using fixed service bandwidth allocation scheme and limited service bandwidth allocation scheme. We also compare the throughput of the proposed scheme with existing single-OLT PON for non-uniform traffic load using limited service bandwidth allocation scheme. The simulation results show that the proposed multi-OLT PON system can supports existing bandwidth allocation schemes with better performance than the single-OLT PON in terms of average packet delay, bandwidth utilization, and throughput.

Monir Hossen; Masanori Hanawa

2012-01-01

215

Crowdsourcing, citizen sensing and sensor web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples.  

Science.gov (United States)

'Wikification of GIS by the masses' is a phrase-term first coined by Kamel Boulos in 2005, two years earlier than Goodchild's term 'Volunteered Geographic Information'. Six years later (2005-2011), OpenStreetMap and Google Earth (GE) are now full-fledged, crowdsourced 'Wikipedias of the Earth' par excellence, with millions of users contributing their own layers to GE, attaching photos, videos, notes and even 3-D (three dimensional) models to locations in GE. From using Twitter in participatory sensing and bicycle-mounted sensors in pervasive environmental sensing, to creating a 100,000-sensor geo-mashup using Semantic Web technology, to the 3-D visualisation of indoor and outdoor surveillance data in real-time and the development of next-generation, collaborative natural user interfaces that will power the spatially-enabled public health and emergency situation rooms of the future, where sensor data and citizen reports can be triaged and acted upon in real-time by distributed teams of professionals, this paper offers a comprehensive state-of-the-art review of the overlapping domains of the Sensor Web, citizen sensing and 'human-in-the-loop sensing' in the era of the Mobile and Social Web, and the roles these domains can play in environmental and public health surveillance and crisis/disaster informatics. We provide an in-depth review of the key issues and trends in these areas, the challenges faced when reasoning and making decisions with real-time crowdsourced data (such as issues of information overload, "noise", misinformation, bias and trust), the core technologies and Open Geospatial Consortium (OGC) standards involved (Sensor Web Enablement and Open GeoSMS), as well as a few outstanding project implementation examples from around the world. PMID:22188675

Kamel Boulos, Maged N; Resch, Bernd; Crowley, David N; Breslin, John G; Sohn, Gunho; Burtner, Russ; Pike, William A; Jezierski, Eduardo; Chuang, Kuo-Yu Slayer

2011-12-21

216

Crowdsourcing, citizen sensing and sensor web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract 'Wikification of GIS by the masses' is a phrase-term first coined by Kamel Boulos in 2005, two years earlier than Goodchild's term 'Volunteered Geographic Information'. Six years later (2005-2011), OpenStreetMap and Google Earth (GE) are now full-fledged, crowdsourced 'Wikipedias of the Earth' par excellence, with millions of users contributing their own layers to GE, attaching photos, videos, notes and even 3-D (three dimensional) models to locations in GE. From using Twitter in participatory sensing and bicycle-mounted sensors in pervasive environmental sensing, to creating a 100,000-sensor geo-mashup using Semantic Web technology, to the 3-D visualisation of indoor and outdoor surveillance data in real-time and the development of next-generation, collaborative natural user interfaces that will power the spatially-enabled public health and emergency situation rooms of the future, where sensor data and citizen reports can be triaged and acted upon in real-time by distributed teams of professionals, this paper offers a comprehensive state-of-the-art review of the overlapping domains of the Sensor Web, citizen sensing and 'human-in-the-loop sensing' in the era of the Mobile and Social Web, and the roles these domains can play in environmental and public health surveillance and crisis/disaster informatics. We provide an in-depth review of the key issues and trends in these areas, the challenges faced when reasoning and making decisions with real-time crowdsourced data (such as issues of information overload, "noise", misinformation, bias and trust), the core technologies and Open Geospatial Consortium (OGC) standards involved (Sensor Web Enablement and Open GeoSMS), as well as a few outstanding project implementation examples from around the world.

Kamel Boulos Maged N; Resch Bernd; Crowley David N; Breslin John G; Sohn Gunho; Burtner Russ; Pike William A; Jezierski Eduardo; Chuang Kuo-Yu

2011-01-01

217

Crowdsourcing, citizen sensing and sensor web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples.  

UK PubMed Central (United Kingdom)

'Wikification of GIS by the masses' is a phrase-term first coined by Kamel Boulos in 2005, two years earlier than Goodchild's term 'Volunteered Geographic Information'. Six years later (2005-2011), OpenStreetMap and Google Earth (GE) are now full-fledged, crowdsourced 'Wikipedias of the Earth' par excellence, with millions of users contributing their own layers to GE, attaching photos, videos, notes and even 3-D (three dimensional) models to locations in GE. From using Twitter in participatory sensing and bicycle-mounted sensors in pervasive environmental sensing, to creating a 100,000-sensor geo-mashup using Semantic Web technology, to the 3-D visualisation of indoor and outdoor surveillance data in real-time and the development of next-generation, collaborative natural user interfaces that will power the spatially-enabled public health and emergency situation rooms of the future, where sensor data and citizen reports can be triaged and acted upon in real-time by distributed teams of professionals, this paper offers a comprehensive state-of-the-art review of the overlapping domains of the Sensor Web, citizen sensing and 'human-in-the-loop sensing' in the era of the Mobile and Social Web, and the roles these domains can play in environmental and public health surveillance and crisis/disaster informatics. We provide an in-depth review of the key issues and trends in these areas, the challenges faced when reasoning and making decisions with real-time crowdsourced data (such as issues of information overload, "noise", misinformation, bias and trust), the core technologies and Open Geospatial Consortium (OGC) standards involved (Sensor Web Enablement and Open GeoSMS), as well as a few outstanding project implementation examples from around the world.

Kamel Boulos MN; Resch B; Crowley DN; Breslin JG; Sohn G; Burtner R; Pike WA; Jezierski E; Chuang KY

2011-01-01

218

Development of a real-time clinical decision support system upon the web mvc-based architecture for prostate cancer treatment  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background A real-time clinical decision support system (RTCDSS) with interactive diagrams enables clinicians to instantly and efficiently track patients' clinical records (PCRs) and improve their quality of clinical care. We propose a RTCDSS to process online clinical informatics from multiple databases for clinical decision making in the treatment of prostate cancer based on Web Model-View-Controller (MVC) architecture, by which the system can easily be adapted to different diseases and applications. Methods We designed a framework upon the Web MVC-based architecture in which the reusable and extractable models can be conveniently adapted to other hospital information systems and which allows for efficient database integration. Then, we determined the clinical variables of the prostate cancer treatment based on participating clinicians' opinions and developed a computational model to determine the pretreatment parameters. Furthermore, the components of the RTCDSS integrated PCRs and decision factors for real-time analysis to provide evidence-based diagrams upon the clinician-oriented interface for visualization of treatment guidance and health risk assessment. Results The resulting system can improve quality of clinical treatment by allowing clinicians to concurrently analyze and evaluate the clinical markers of prostate cancer patients with instantaneous clinical data and evidence-based diagrams which can automatically identify pretreatment parameters. Moreover, the proposed RTCDSS can aid interactions between patients and clinicians. Conclusions Our proposed framework supports online clinical informatics, evaluates treatment risks, offers interactive guidance, and provides real-time reference for decision making in the treatment of prostate cancer. The developed clinician-oriented interface can assist clinicians in conveniently presenting evidence-based information to patients and can be readily adapted to an existing hospital information system and be easily applied in other chronic diseases.

Lin Hsueh-Chun; Wu Hsi-Chin; Chang Chih-Hung; Li Tsai-Chung; Liang Wen-Miin; Wang Jong-Yi

2011-01-01

219

Origin of piezoelectricity in an electrospun poly(vinylidene fluoride-trifluoroethylene) nanofiber web-based nanogenerator and nano-pressure sensor.  

Science.gov (United States)

A single stage electrospinning process can give rise to preferentially oriented induced dipoles in poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanofibers. The piezoelectricity of as-electrospun P(VDF-TrFE) nanofiber webs opens up new possibilities for their use as a flexible nanogenerators and nano-pressure sensors. In this work, the origin of the piezoelectricity has been spotlighted by randomization of the induced dipoles at the Curie temperature and analyzed by polarized FT-IR spectroscopic techniques as well as by detecting the piezoelectric signal from a nano-pressure sensor. PMID:21500300

Mandal, Dipankar; Yoon, Sun; Kim, Kap Jin

2011-04-15

220

Origin of piezoelectricity in an electrospun poly(vinylidene fluoride-trifluoroethylene) nanofiber web-based nanogenerator and nano-pressure sensor.  

UK PubMed Central (United Kingdom)

A single stage electrospinning process can give rise to preferentially oriented induced dipoles in poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanofibers. The piezoelectricity of as-electrospun P(VDF-TrFE) nanofiber webs opens up new possibilities for their use as a flexible nanogenerators and nano-pressure sensors. In this work, the origin of the piezoelectricity has been spotlighted by randomization of the induced dipoles at the Curie temperature and analyzed by polarized FT-IR spectroscopic techniques as well as by detecting the piezoelectric signal from a nano-pressure sensor.

Mandal D; Yoon S; Kim KJ

2011-06-01

 
 
 
 
221

A generic, web-based clinical information system architecture using HL7 CDA: successful implementation in dermatological routine care.  

UK PubMed Central (United Kingdom)

The requirements of highly specialized clinical domains are often underrepresented in hospital information systems (HIS). Common consequences are that documentation remains to be paper-based or external systems with insufficient HIS integration are used. This paper presents a solution to overcome this deficiency in the form of a generic framework based on the HL7 Clinical Document Architecture. The central architectural idea is the definition of customized forms using a schema-controlled XML language. These flexible form definitions drive the user interface, the data storage, and standardized data exchange. A successful proof-of-concept application in a dermatologic outpatient wound care department has been implemented, and is well accepted by the clinicians. Our work with HL7 CDA revealed the need for further practical research in the health information standards realm.

Schuler T; Boeker M; Klar R; Müller M

2007-01-01

222

A generic, web-based clinical information system architecture using HL7 CDA: successful implementation in dermatological routine care.  

Science.gov (United States)

The requirements of highly specialized clinical domains are often underrepresented in hospital information systems (HIS). Common consequences are that documentation remains to be paper-based or external systems with insufficient HIS integration are used. This paper presents a solution to overcome this deficiency in the form of a generic framework based on the HL7 Clinical Document Architecture. The central architectural idea is the definition of customized forms using a schema-controlled XML language. These flexible form definitions drive the user interface, the data storage, and standardized data exchange. A successful proof-of-concept application in a dermatologic outpatient wound care department has been implemented, and is well accepted by the clinicians. Our work with HL7 CDA revealed the need for further practical research in the health information standards realm. PMID:17911755

Schuler, Thilo; Boeker, Martin; Klar, Rüdiger; Müller, Marcel

2007-01-01

223

Rapidice Viewer: a Web Application to Observe Near Real-Time Changes in Polar Ice Sheets and Glaciers with a Multi-Sensor Multi-Temporal Approach  

Science.gov (United States)

The Rapid Ice Sheet Change Observatory (RISCO) is an inter-organizational collaboration created to provide a systematic framework for gathering, processing, analyzing, and distributing consistent satellite imagery of polar ice sheet dynamics. With increased access to satellite imagery from a number of sources with a various licensing agreements, RISCO has gathered, processed, and served imagery from sensors at multiple spatial and temporal resolutions through time. Currently, sensors included in the data repository are LANDSAT, MODIS, ENVISAT, ASTER, SPOT, WorldView-01, WorldView-02, QuickBird-02, and, GeoEye-01. With the data, we observe glacial dynamics for polar regions and have developed an interactive web application to view and serve data. The RapidIce Viewer provides an interface to RISCO's satellite imagery repository, presenting it in an integrated, web-based application. Users can filter by date, sensor, and region to explore current or historical imagery. The application features options to download the processed satellite data as well as to view animated movies for specified date ranges and regions. It allows researchers to view ice sheet and glacial dynamics, statuses, trends, and events conveniently from a web browser.

Herried, B.; Porter, C. C.; Morin, P. J.; Howat, I. M.; Rapid Ice Sheet Change Observatory (Risco)

2011-12-01

224

Digital Earth Watch (DEW): How Mobile Apps Are Paving The Way Towards A Federated Web-Services Architecture For Citizen Science  

Science.gov (United States)

Dozens of web-based initiatives allow citizens to provide information to programs that monitor the health of our environment. A concerned citizen can participate on-line as a weather "spotter", provide important phenological information to national databases, update bird counts in the area, or record the freezing of ponds, and much more. Many of these programs are developing mobile apps as companion tools to their web sites. Our group was involved in the development of one such companion app as an adjunct to the Picture Post project web site. Digital Earth Watch (DEW) and the Picture Post network support environmental monitoring through repeat digital photography and satellite imagery. A Picture Post is an eight-sided platform on a stand-alone post for taking a panoramic series of photographs. By taking pictures on a regular basis at Picture Post sites and by sharing these pictures on the program's web site (housed at the University of New Hampshire), citizen scientists are creating a photographic library of change-over-time in their local area and contributing to national monitoring programs. Our DEW Android application simplifies participation by allowing users to upload pictures instantly from their smart phone. The app also removes the constraint of the physical picture post, by allowing users to create a virtual post anywhere in the world. Posts have been set up to monitor trails, forests, water, wetlands, gardens and landscapes. The app uses the phone's GPS to position the virtual post in its geographic location and guides the user through the orientations thanks to the internal accelerometers and compass. To aid in the before-and-after comparison of images taken from the same orientation, the DEW app displays an "onionskin" of the prior image overlayed onto the camera viewfinder. With the transparent onionskin as a guide, the user can align the images more accurately, thus allowing differences between pictures to be detectable and measurable. The app interacts with the UNH server via APIs (Application Programming Interfaces) that were created to allow bi-directional machine-to-machine interaction between the mobile device and the web site. Thus, the principal functions that a user can perform on the web site, such as finding post sites on a map and viewing and adding picture sets, are available on the smartphone. The development of the APIs makes it now possible not only to communicate with our own mobile app, but, more importantly, it opens the door for other computer systems to directly interact with our server. Our ongoing discussions with the National Phenology Network and Project Budburst, have highlighted the potential (and perhaps the need) for the creation of a distributed web-service architecture whereby each national program exposes its key functionalities not only to their own mobile phone apps, but also to other organizations, in a federated system of servers, all supporting citizen-based digital earth watch programs.

Carrera, F.; Schloss, A. L.; Guerin, S.; Beaudry, J.; Pickle, J.

2011-12-01

225

Semantic Web Technologies for Aerospace  

UK PubMed Central (United Kingdom)

Emerging Semantic Web technology such as theDARPA Agent Markup Language (DAML) will supportadvanced semantic interoperability in the next generation ofaerospace architectures. The basic idea of DAML is to markup artifacts (e.g., documents, sensors, databases, legacysoftware) so that software agents can interpret and reasonwith the information. DAML will support the representationof ontologies (which include taxonomies of terms andsemantic relations) via extensions to XML. XML alone isnot sufficient for agents because it provides only syntacticinteroperability that depends on implicit semanticagreements. DAML is the official starting point for the WebOntology Language, an emerging standard from the WorldWide Web Consortium. This paper will cover promisingaerospace applications and significant challenges forSemantic Web technologies. Potential applications includehigher-level information fusion, collaboration in bothoperational and engineering environments and rapid systemsintegration. The challenges that will be discussed include thecomplexity of ontology development, automation of markup,semantic mismatch between current object-oriented modelsand Semantic Web ontologies, scalability issues related toreasoning with large knowledge bases and technologytransition issues. The paper will explain ongoing researchthat is focused on addressing these challenges.

Paul Kogut; Jeff Heflin

226

Low Latency Sensor Web Integration of Seismic Tomography, InSAR, and Deformation Models  

Science.gov (United States)

In the volcanic environment, seismometers are sensitive to high-frequency, brittle failure earthquakes (tectonic-shear and dike intrusion events) and volcanic tremor. Real-time seismic analysis provides epicenter location, fault parameters, and, given enough data, the geometry of magmatic intrusion with short latency. Due to the limits of the seismic frequency response, however, seismic data analysis can only infer magma movement and volume change through their manifestation on changes in the elastic properties of the volcano obtained from tomography, and when possible from tracking earthquake hypocenters. Geodetic measurements (GPS, leveling, InSAR) on the other hand, measure volume changes and surface strain more directly by tracking surface deformation. Geodetic observations, however, lack the sensitivity to distinguish between various sources of surface deformation. In particular, the separation of deformation due to magma migration from all other extraneous sources is a key limitation of geodetic data inversion. We will present a framework in which high-resolution, real-time seismic tomography, calculated by a distributed network of seismic sensor nodes, can be coupled with low-latency InSAR acquisition and processing to constrain three-dimensional(3D) finite element model (FEM) solutions for the volcano deformation sources. The FEM simulates pressurized magma chambers (a deformation source) embedded in domains having a distribution of material properties, determined from seismic tomography models, and the irregular relief of a volcano, according to available digital elevation models (DEMs). The mass and volume estimates thus calculated, are then re-incorporated into the next iteration of the seismic tomography. This is done by first delineating subsurface regions where magma injection is required by the deformation models. Model parameters within these 3D structures are constrained by restricting the range of velocity (or Q) those voxels (model elemets) can take on. The constraints are applied with given level of flexibility, so that the seismic inversion can modify the models as required by the travel-time perturbations. A natural feedback between the deformation modeling and the tomographic analysis is achieved via sequential, cooperative inversion.

Kedar, S.; Masterlark, T.; Lees, J. M.; Lundgren, P.; Song, W.

2011-12-01

227

Crowdsourcing, citizen sensing and Sensor Web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples  

Energy Technology Data Exchange (ETDEWEB)

The PIE Activity Awareness Environment is designed to be an adaptive data triage and decision support tool that allows role and activity based situation awareness through a dynamic, trainable filtering system. This paper discusses the process and methodology involved in the application as well as some of its capabilities. 'Wikification of GIS by the masses' is a phrase-term first coined by Kamel Boulos in 2005, two years earlier than Goodchild's term 'Volunteered Geographic Information'. Six years later (2005-2011), OpenStreetMap and Google Earth (GE) are now full-fledged, crowdsourced 'Wikipedias of the Earth' par excellence, with millions of users contributing their own layers to GE, attaching photos, videos, notes and even 3-D (three dimensional) models to locations in GE. From using Twitter in participatory sensing and bicycle-mounted sensors in pervasive environmental sensing, to creating a 100,000-sensor geo-mashup using Semantic Web technology, to the 3-D visualisation of indoor and outdoor surveillance data in real-time and the development of next-generation, collaborative natural user interfaces that will power the spatially-enabled public health and emergency situation rooms of the future, where sensor data and citizen reports can be triaged and acted upon in real-time by distributed teams of professionals, this paper offers a comprehensive state-of-the-art review of the overlapping domains of the Sensor Web, citizen sensing and 'human-in-the-loop sensing' in the era of the Mobile and Social Web, and the roles these domains can play in environmental and public health surveillance and crisis/disaster informatics. We provide an in-depth review of the key issues and trends in these areas, the challenges faced when reasoning and making decisions with real-time crowdsourced data (such as issues of information overload, 'noise', misinformation, bias and trust), the core technologies and Open Geospatial Consortium (OGC) standards involved (Sensor Web Enablement and Open GeoSMS), as well as a few outstanding project implementation examples from around the world.

Kamel Boulos, Maged; Resch, Bernd; Crowley, David N.; Breslin, John G.; Sohn, Gunho; Burtner, Edwin R.; Pike, William A.; Jeziersk, Eduardo; Slayer Chuang, Kuo Yu

2011-12-21

228

Architecture and Protocol of a Semantic System Designed for Video Tagging with Sensor Data in Mobile Devices  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Current mobile phones come with several sensors and powerful video cameras. These video cameras can be used to capture good quality scenes, which can be complemented with the information gathered by the sensors also embedded in the phones. For example, the surroundings of a beach recorded by the cam...

Elsa Macias; Jaime Lloret; Alvaro Suarez; Miguel Garcia

229

Building a virtual archive using brain architecture and Web 3D to deliver neuropsychopharmacology content over the Internet.  

UK PubMed Central (United Kingdom)

The vast amount of heterogeneous data generated in various fields of neurosciences such as neuropsychopharmacology can hardly be classified using traditional databases. We present here the concept of a virtual archive, spatially referenced over a simplified 3D brain map and accessible over the Internet. A simple prototype (available at http://aquatics.crs4.it/neuropsydat3d) has been realized using current Web-based virtual reality standards and technologies. It illustrates how primary literature or summary information can easily be retrieved through hyperlinks mapped onto a 3D schema while navigating through neuroanatomy. Furthermore, 3D navigation and visualization techniques are used to enhance the representation of brain's neurotransmitters, pathways and the involvement of specific brain areas in any particular physiological or behavioral functions. The system proposed shows how the use of a schematic spatial organization of data, widely exploited in other fields (e.g. Geographical Information Systems) can be extremely useful to develop efficient tools for research and teaching in neurosciences.

Mongeau R; Casu MA; Pani L; Pillolla G; Lianas L; Giachetti A

2008-05-01

230

Virtual Museum of Architecture  

Science.gov (United States)

Architect Stephen Lauf created this site, Quondam: A Virtual Museum of Architecture, to combine architecture and computers. Lauf was the first architect in Philadelphia to master computer aided design (CAD) and 3-dimensional computer modeling. Today there are over 30 computer models that mak up the Quondam Web site's core collection.

Lauf, Stephen

231

PICNIC Architecture.  

UK PubMed Central (United Kingdom)

The PICNIC architecture aims at supporting inter-enterprise integration and the facilitation of collaboration between healthcare organisations. The concept of a Regional Health Economy (RHE) is introduced to illustrate the varying nature of inter-enterprise collaboration between healthcare organisations collaborating in providing health services to citizens and patients in a regional setting. The PICNIC architecture comprises a number of PICNIC IT Services, the interfaces between them and presents a way to assemble these into a functioning Regional Health Care Network meeting the needs and concerns of its stakeholders. The PICNIC architecture is presented through a number of views relevant to different stakeholder groups. The stakeholders of the first view are national and regional health authorities and policy makers. The view describes how the architecture enables the implementation of national and regional health policies, strategies and organisational structures. The stakeholders of the second view, the service viewpoint, are the care providers, health professionals, patients and citizens. The view describes how the architecture supports and enables regional care delivery and process management including continuity of care (shared care) and citizen-centred health services. The stakeholders of the third view, the engineering view, are those that design, build and implement the RHCN. The view comprises four sub views: software engineering, IT services engineering, security and data. The proposed architecture is founded into the main stream of how distributed computing environments are evolving. The architecture is realised using the web services approach. A number of well established technology platforms and generic standards exist that can be used to implement the software components. The software components that are specified in PICNIC are implemented in Open Source.

Saranummi N

2005-01-01

232

WHAT IS INFORMATION ARCHITECTURE?  

Directory of Open Access Journals (Sweden)

Full Text Available The research takes a bibliographical and exploratory and consisted of a broad theoretical framework about the issues of Information Architecture and Information Architecture for the Web, listing the definitions, methodologies and assumptions as measured by several researchers. Aims to clarify concepts and terms about what becomes of Information Architecture for Web, aiming to disseminate information within this theme, since it has been hard enough on entering various areas of knowledge, whether in Information Science, Communication, Library Design, and human-computer interaction and others.

Maria Amélia Teixeira da Silva

2011-01-01

233

Tantalum oxide honeycomb architectures for the development of a non-enzymatic glucose sensor with wide detection range.  

Science.gov (United States)

Tantalum oxide honeycomb nanostructures (THNS) were fabricated by electrochemical anodisation of tantalum in H2SO4-HF medium. XRD analysis showed that annealing of THNS at 400°C improves the crystallinity. HRSEM and AFM results illustrated that nanopores with an average diameter of 30nm were uniformly distributed and the pore size reduced to 24nm and 18nm during subsequent electrodeposition of Pt and CuO. Electrodeposited Pt and CuO exhibited face centered cubic (fcc) and monoclinic crystal structure respectively. Cyclic voltammetric studies revealed that, on the hybrid material electrooxidation of glucose occurs at a lower potential (0.45V). The sensor exhibited linear response to glucose up to 31mM, fast response time (<3s) and a low detection limit of 1?M (S/N=3). The sensor is free of interference from ascorbic acid, uric acid, dopamine and acetaminophen. Sensor was used to analyze glucose in blood serum samples. PMID:23911662

Suneesh, P V; Chandhini, K; Ramachandran, T; Nair, Bipin G; Satheesh Babu, T G

2013-07-11

234

Tantalum oxide honeycomb architectures for the development of a non-enzymatic glucose sensor with wide detection range.  

UK PubMed Central (United Kingdom)

Tantalum oxide honeycomb nanostructures (THNS) were fabricated by electrochemical anodisation of tantalum in H2SO4-HF medium. XRD analysis showed that annealing of THNS at 400°C improves the crystallinity. HRSEM and AFM results illustrated that nanopores with an average diameter of 30nm were uniformly distributed and the pore size reduced to 24nm and 18nm during subsequent electrodeposition of Pt and CuO. Electrodeposited Pt and CuO exhibited face centered cubic (fcc) and monoclinic crystal structure respectively. Cyclic voltammetric studies revealed that, on the hybrid material electrooxidation of glucose occurs at a lower potential (0.45V). The sensor exhibited linear response to glucose up to 31mM, fast response time (<3s) and a low detection limit of 1?M (S/N=3). The sensor is free of interference from ascorbic acid, uric acid, dopamine and acetaminophen. Sensor was used to analyze glucose in blood serum samples.

Suneesh PV; Chandhini K; Ramachandran T; Nair BG; Satheesh Babu TG

2013-12-01

235

Networking Sensor Observations, Forecast Models & Data Analysis Tools  

Science.gov (United States)

This presentation explores the interaction between sensor webs and forecast models and data analysis processes within service oriented architectures (SOA). Earth observation data from surface monitors and satellite sensors and output from earth science models are increasingly available through open interfaces that adhere to web standards, such as the OGC Web Coverage Service (WCS), OGC Sensor Observation Service (SOS), OGC Web Processing Service (WPS), SOAP-Web Services Description Language (WSDL), or RESTful web services. We examine the implementation of these standards from the perspective of forecast models and analysis tools. Interoperable interfaces for model inputs, outputs, and settings are defined with the purpose of connecting them with data access services in service oriented frameworks. We review current best practices in modular modeling, such as OpenMI and ESMF/Mapl, and examine the applicability of those practices to service oriented sensor webs. In particular, we apply sensor-model-analysis interfaces within the context of wildfire smoke analysis and forecasting scenario used in the recent GEOSS Architecture Implementation Pilot. Fire locations derived from satellites and surface observations and reconciled through a US Forest Service SOAP web service are used to initialize a CALPUFF smoke forecast model. The results of the smoke forecast model are served through an OGC WCS interface that is accessed from an analysis tool that extract areas of high particulate matter concentrations and a data comparison tool that compares the forecasted smoke with Unattended Aerial System (UAS) collected imagery and satellite-derived aerosol indices. An OGC WPS that calculates population statistics based on polygon areas is used with the extract area of high particulate matter to derive information on the population expected to be impacted by smoke from the wildfires. We described the process for enabling the fire location, smoke forecast, smoke observation, and population statistics services to be registered with the GEOSS registry and made findable through the GEOSS Clearinghouse. The fusion of data sources and different web service interfaces illustrate the agility in using standard interfaces and help define the type of input and output interfaces needed to connect models and analysis tools within sensor webs.

Falke, S. R.; Roberts, G.; Sullivan, D.; Dibner, P. C.; Husar, R. B.

2009-12-01

236

An integration platform for heterogeneous sensor systems in GITEWS – Tsunami Service Bus  

Directory of Open Access Journals (Sweden)

Full Text Available The German Indonesian Tsunami Early Warning System (GITEWS) is built upon a complex sensor data infrastructure. To best fulfill the demand for a long living system, the underlying software and hardware architecture of GITEWS must be prepared for future modifications both of single sensors and entire sensors systems. The foundation for a flexible integration and for stable interfaces is a result of following the paradigm of a Service Oriented Architecture (SOA). The Tsunami Service Bus (TSB) – our integration platform in GITEWS – realizes this SOA approach by implementing the Sensor Web Enablement (SWE) standards and services. This paper focuses on architectural and implementation aspects of the TSB. Initially, the general architectural approach in GITEWS by SOA and SWE is presented. Based on this conception, the concrete system architecture of GITEWS is introduced. The sensor integration platform TSB is then discussed in detail, following by its primary responsibilities and components. Special emphasis is laid on architectural transparency, comprehensible design decisions, and references to the applied technology.

J. Fleischer; R. Häner; S. Herrnkind; A. Kloth; U. Kriegel; H. Schwarting; J. Wächter

2010-01-01

237

Web Robots and Web Mining  

Science.gov (United States)

Manually indexing the World Wide Web is obviously an impossible task, and it is even a daunting challenge for automated techniques. Web content mining is a general term used to describe these techniques, which are intended for information categorization and filtering. Web robots serve a variety of purposes, including indexing; and they can be useful or, in some cases, harmful. Web usage mining, on the other hand, is used to determine how a Web site's structure and organization effect the way users navigate the site.The Web Robots Pages (1) is an excellent starting place to learn about these automated programs. Several hundred robots are documented in a database, and a selection of papers considers proper ethics and guidelines for using robots, among other things. An article on Web mining and its subclasses is given on DM Review (2). It describes the basics of Web analysis and outlines many benefits Web mining can offer. A course homepage on Web data mining from DePaul University (3) offers a broad selection of reading material on the subject. Mostly consisting of research papers and journal articles, the documents range from general applications to specific theories and case studies. Two computer scientists from Polytechnic University propose a robust, distributed Web crawler (another term for Web robot), intended for large-scale network interaction (4). The twelve page paper begins with the motivation for the project, and continues with a full description of the system architecture and implementation. The November 2002 issue of Computer magazine featured an article on Data Mining for Web Intelligence (5). It points out that today's Internet is lacking in many key aspects, and that Web mining will play an important role in the development of improved search engines and automatic document classification. A short poster presentation from the 2002 International World Wide Web Conference (6) introduces GeniMiner, a Web search strategy based on a genetic algorithm. GeniMiner operates on the premise of finding a nearly optimal solution in order to minimize manual analysis of the search results. KDnuggets (7) is a free, biweekly newsletter on data and Web mining. In recent issues, special attention has been given to the Total Information Awareness project, which is investigating ways of mining the Web and email for possible information about terrorist activity. Web robots are occasionally used for malicious purposes, namely to automatically register for free email or participate in online polls. A technology that was developed to counter these robots involved using a blurred or distorted word to gain access, which could easily be read by a human but would be impossible for a robot to read. In a press release from the University of California at Berkeley (8), researchers have discovered a way to allow Web robots to crack this security system. The article describes how it was accomplished and provides motivation for more advanced security measures.

Leske, Cavin.

2003-01-01

238

Architecture and Protocol of a Semantic System Designed for Video Tagging with Sensor Data in Mobile Devices  

Directory of Open Access Journals (Sweden)

Full Text Available Current mobile phones come with several sensors and powerful video cameras. These video cameras can be used to capture good quality scenes, which can be complemented with the information gathered by the sensors also embedded in the phones. For example, the surroundings of a beach recorded by the camera of the mobile phone, jointly with the temperature of the site can let users know via the Internet if the weather is nice enough to swim. In this paper, we present a system that tags the video frames of the video recorded from mobile phones with the data collected by the embedded sensors. The tagged video is uploaded to a video server, which is placed on the Internet and is accessible by any user. The proposed system uses a semantic approach with the stored information in order to make easy and efficient video searches. Our experimental results show that it is possible to tag video frames in real time and send the tagged video to the server with very low packet delay variations. As far as we know there is not any other application developed as the one presented in this paper.

Elsa Macias; Jaime Lloret; Alvaro Suarez; Miguel Garcia

2012-01-01

239

Architecture and Protocol of a Semantic System Designed for Video Tagging with Sensor Data in Mobile Devices  

Science.gov (United States)

Current mobile phones come with several sensors and powerful video cameras. These video cameras can be used to capture good quality scenes, which can be complemented with the information gathered by the sensors also embedded in the phones. For example, the surroundings of a beach recorded by the camera of the mobile phone, jointly with the temperature of the site can let users know via the Internet if the weather is nice enough to swim. In this paper, we present a system that tags the video frames of the video recorded from mobile phones with the data collected by the embedded sensors. The tagged video is uploaded to a video server, which is placed on the Internet and is accessible by any user. The proposed system uses a semantic approach with the stored information in order to make easy and efficient video searches. Our experimental results show that it is possible to tag video frames in real time and send the tagged video to the server with very low packet delay variations. As far as we know there is not any other application developed as the one presented in this paper.

Macias, Elsa; Lloret, Jaime; Suarez, Alvaro; Garcia, Miguel

2012-01-01

240

Architecture and protocol of a semantic system designed for video tagging with sensor data in mobile devices.  

UK PubMed Central (United Kingdom)

Current mobile phones come with several sensors and powerful video cameras. These video cameras can be used to capture good quality scenes, which can be complemented with the information gathered by the sensors also embedded in the phones. For example, the surroundings of a beach recorded by the camera of the mobile phone, jointly with the temperature of the site can let users know via the Internet if the weather is nice enough to swim. In this paper, we present a system that tags the video frames of the video recorded from mobile phones with the data collected by the embedded sensors. The tagged video is uploaded to a video server, which is placed on the Internet and is accessible by any user. The proposed system uses a semantic approach with the stored information in order to make easy and efficient video searches. Our experimental results show that it is possible to tag video frames in real time and send the tagged video to the server with very low packet delay variations. As far as we know there is not any other application developed as the one presented in this paper.

Macias E; Lloret J; Suarez A; Garcia M

2012-01-01

 
 
 
 
241

The definitive guide to HTML5 WebSocket  

CERN Document Server

The Definitive Guide to HTML5 WebSocket is the ultimate insider's WebSocket resource. This revolutionary new web technology enables you to harness the power of true real-time connectivity and build responsive, modern web applications.   This book contains everything web developers and architects need to know about WebSocket. It discusses how WebSocket-based architectures provide a dramatic reduction in unnecessary network overhead and latency compared to older HTTP (Ajax) architectures, how to layer widely used protocols such as XMPP and STOMP on top of WebSocket, and how to secure WebSocket c

Wang, Vanessa; Moskovits, Peter

2013-01-01

242

DYNAMIC INVOCATION OF WEB SERVICES  

Directory of Open Access Journals (Sweden)

Full Text Available When we use web service, we should add it in the web reference and then call its methods statically. This way of calling web services has lots of limitations. In order to take maximum advantage of the flexibility and power of Web services, the user must be able to dynamically discover and invoke a Web service. We need to dynamically discover and invoke the service because the information returned from web services can be used by heterogeneous applications which are executed on different machines. As our business world is dynamic and heterogeneous, a client often needs to invoke an unfamiliar web service at run time. However, current web services technology pays little attention to this issue. In this paper, we propose a framework for a client to dynamically invoke web services. The framework can increase the use and reliability of web services invocation in a dynamic, heterogeneous environment. Web Service has been widely accepted by industry. How to find and integrate existing Web Service is a crucial work. Client finds Web Service from UDDI Registry and invokes it directly as described in a contract, web service description language, WSDL. It is difficult for an enterprise user to dynamically invoke the most appropriate Web Service. This paper briefly introduces Service-Oriented Architecture and discusses advantages and disadvantages of UDDI, then puts forward a dynamic Web Service framework that extends the SOA.

Tere G.M., Jadhav B.T. and Mudholkar R.R.

2012-01-01

243

The exploitation of data from remote and human sensors for environment monitoring in the SMAT project.  

UK PubMed Central (United Kingdom)

In this paper, we outline the functionalities of a system that integrates and controls a fleet of Unmanned Aircraft Vehicles (UAVs). UAVs have a set of payload sensors employed for territorial surveillance, whose outputs are stored in the system and analysed by the data exploitation functions at different levels. In particular, we detail the second level data exploitation function whose aim is to improve the sensors data interpretation in the post-mission activities. It is concerned with the mosaicking of the aerial images and the cartography enrichment by human sensors--the social media users. We also describe the software architecture for the development of a mash-up (the integration of information and functionalities coming from the Web) and the possibility of using human sensors in the monitoring of the territory, a field in which, traditionally, the involved sensors were only the hardware ones.

Meo R; Roglia E; Bottino A

2012-01-01

244

Design an Embedded Web Server for Monitoring and Controlling Systems or Devices  

Directory of Open Access Journals (Sweden)

Full Text Available The paper presents the design of embedded web server based on ARM9 Micro-processor and Linux platform and analyses hardware configuration and software implementation for monitoring and controlling systems or devices. In various applications like client server architecture it is better to use embedded web server other than pc server because we can control the electronic devices without distance by using web technology. It mainly targets on crucial points of promoting the GUI applications which are based on Qt/Embedded and the Linux drivers for different types of sensors in monitoring and controlling system projects. QT is the leading application and UI framework for devices powered by embedded Linux. The monitoring and controlling system uses Samsung S3C2440A processor as its main controller. Embedded Linux operating system and embedded web server run on the main controller to manage various types of equipments including sensor networks etc. The different electronic devices are connected to ARM9 through UART ports. The data from these electronic devices are stored in ARM9 micro controllers through RS-232 serial bus communication. The data from web server is received through http protocols and displayed on web page.

G.Sunil Kumar #1 , T.Swapna

2013-01-01

245

Spider silk: Webs measure up  

Science.gov (United States)

The complete elastic response of a spider's orb web has been quantified by non-invasive light scattering, revealing important insights into the architecture, natural material use and mechanical properties of the web. This knowledge advances our understanding of the prey-catching process and the role of supercontraction therein.

Qin, Zhao; Buehler, Markus J.

2013-03-01

246

Survey on Improving the Performance of Web by Evaluation of Web Prefetching and Caching Algorithms  

Directory of Open Access Journals (Sweden)

Full Text Available Web caching and prefetching have been studied inthe past separately. In this paper, we present anintegrated architecture for Web object caching andprefetching. Our goal is to design a prefetchingsystem that can work with an existing Web cachingsystem in a seamless manner. In this integratedarchitecture, a certain amount of caching space isreserved for prefetching. To empower the prefetchingengine, a Web-object prediction model is built bymining the frequent paths from past Web log data.We show that the integrated architecture improvesthe performance over Web caching alone, andpresent our analysis on the tradeoff between thereduced latency and the potential increase in networkload

Arun Pasrija

2013-01-01

247

Giant magnetoresistive sensor  

Energy Technology Data Exchange (ETDEWEB)

A magnetoresistive sensor element with a three-dimensional micro-architecture is capable of significantly improved sensitivity and highly localized measurement of magnetic fields. The sensor is formed of a multilayer film of alternately magnetic and nonmagnetic materials. The sensor is optimally operated in a current perpendicular to plane mode. The sensor is useful in magnetic read/write heads, for high density magnetic information storage and retrieval.

Stearns, Daniel G. (Los Altos, CA); Vernon, Stephen P. (Pleasanton, CA); Ceglio, Natale M. (Livermore, CA); Hawryluk, Andrew M. (Modesto, CA)

1999-01-01

248

Modular intelligent sensor system.  

Science.gov (United States)

This paper describes a sensor system architecture suitable for application in systems intended for battery powered unattended use. The modularity concept addresses the logical interconnects between modules, the electrical interconnects between modules, an...

D. A. Fuess

1993-01-01

249

Instrument Monitoring, Data Sharing, and Archiving Using Common Instrument Middleware Architecture (CIMA)  

Energy Technology Data Exchange (ETDEWEB)

The Common Instrument Middleware Architecture (CIMA) aims at Grid-enabling a wide range of scientific instruments and sensors to enable easy access to and sharing and storage of data produced by these instruments and sensors. This paper describes the implementation of CIMA applied to the field of single-crystal X-ray crystallography. To allow the researchers to easily view the current and past data streams from the instruments or sensors in a laboratory, a crystallography portal and associated portlets were developed for this application. The CIMA-based crystallography system provides an opportunity for anyone with Web access to observe and use crystallographic and other data from laboratories that previously had only limited access.

Bramley, Randall; Chiu, Kenneth; Devadithya, Tharaka; Gupta, Nisha; Hart, Charles; Huffman, John C.; Huffman, Kianosh; Ma, Yu; McMullen, Donald F. (SUNY); (Indiana)

2008-10-03

250

Sustainable architectures; Architectures durables  

Energy Technology Data Exchange (ETDEWEB)

This book, devoted both to professionals and non-specialists, presents 50 European realizations designed in the spirit of high environmental quality. These realizations aim at demonstrating that it is possible to build low energy consuming buildings with sound and renewable materials and allowing to reduce the operation costs. The variety of the buildings presented demonstrates the suitability of the environmental approach to all kind of contexts without renouncing to the comfort and aesthetic qualities of architecture. (J.S.)

NONE

2003-07-01

251

Writing for the web composing, coding, and constructing web sites  

CERN Document Server

Writing for the Web unites theory, technology, and practice to explore writing and hypertext for website creation. It integrates such key topics as XHTML/CSS coding, writing (prose) for the Web, the rhetorical needs of the audience, theories of hypertext, usability and architecture, and the basics of web site design and technology. Presenting information in digestible parts, this text enables students to write and construct realistic and manageable Web sites with a strong theoretical understanding of how online texts communicate to audiences. Key features of the book

Applen, JD

2013-01-01

252

The tsunami service bus, an integration platform for heterogeneous sensor systems  

Science.gov (United States)

1. INTRODUCTION Early warning systems are long living and evolving: New sensor-systems and -types may be developed and deployed, sensors will be replaced or redeployed on other locations and the functionality of analyzing software will be improved. To ensure a continuous operability of those systems their architecture must be evolution-enabled. From a computer science point of view an evolution-enabled architecture must fulfill following criteria: • Encapsulation of and functionality on data in standardized services. Access to proprietary sensor data is only possible via these services. • Loose coupling of system constituents which easily can be achieved by implementing standardized interfaces. • Location transparency of services what means that services can be provided everywhere. • Separation of concerns that means breaking a system into distinct features which overlap in functionality as little as possible. A Service Oriented Architecture (SOA) as e. g. realized in the German Indonesian Tsunami Early Warning System (GITEWS) and the advantages of functional integration on the basis of services described below adopt these criteria best. 2. SENSOR INTEGRATION Integration of data from (distributed) data sources is just a standard task in computer science. From few well known solution patterns, taking into account performance and security requirements of early warning systems only functional integration should be considered. Precondition for this is that systems are realized compliant to SOA patterns. Functionality is realized in form of dedicated components communicating via a service infrastructure. These components provide their functionality in form of services via standardized and published interfaces which could be used to access data maintained in - and functionality provided by dedicated components. Functional integration replaces the tight coupling at data level by a dependency on loosely coupled services. If the interfaces of the service providing components remain unchanged, components can be maintained and evolved independently on each other and service functionality as a whole can be reused. In GITEWS the functional integration pattern was adopted by applying the principles of an Enterprise Service Bus (ESB) as a backbone. Four services provided by the so called Tsunami Service Bus (TSB) which are essential for early warning systems are realized compliant to services specified within the Sensor Web Enablement (SWE) initiative of the Open Geospatial Consortium (OGC). 3. ARCHITECTURE The integration platform was developed to access proprietary, heterogeneous sensor data and to provide them in a uniform manner for further use. Its core, the TSB provides both a messaging-backbone and -interfaces on the basis of a Java Messaging Service (JMS). The logical architecture of GITEWS consists of four independent layers: • A resource layer where physical or virtual sensors as well as data or model storages provide relevant measurement-, event- and analysis-data: Utilizable for the TSB are any kind of data. In addition to sensors databases, model data and processing applications are adopted. SWE specifies encoding both to access and to describe these data in a comprehensive way: 1. Sensor Model Language (SensorML): Standardized description of sensors and sensor data 2. Observations and Measurements (O&M): Model and encoding of sensor measurements • A service layer to collect and conduct data from heterogeneous and proprietary resources and provide them via standardized interfaces: The TSB enables interaction with sensors via the following services: 1. Sensor Observation Service (SOS): Standardized access to sensor data 2. Sensor Planning Service (SPS): Controlling of sensors and sensor networks 3. Sensor Alert Service (SAS): Active sending of data if defined events occur 4. Web Notification Service (WNS): Conduction of asynchronous dialogues between services • An orchestration layer where atomic services are composed and arranged to high level processes like a decision support process: One of the outstand

Haener, R.; Waechter, J.; Kriegel, U.; Fleischer, J.; Mueller, S.

2009-04-01

253

Miniaturized wireless sensor network  

CERN Multimedia

This paper addresses an overview of the wireless sensor networks. It is shown that MEMS/NEMS technologies and SIP concept are well suited for advanced architectures. It is also shown analog architectures have to be compatible with digital signal techniques to develop smart network of microsystem.

Lecointre, Aubin; Dubuc, David; Katia, Grenier; Patrick, Pons; Aubert, Hervé; Muller, A; Berthou, Pascal; Gayraud, Thierry; Plana, Robert

2010-01-01

254

A Framework for Incremental Hidden Web Crawler  

Directory of Open Access Journals (Sweden)

Full Text Available Hidden Web’s broad and relevant coverage of dynamic and high quality contents coupled with the high change frequency of web pages poses a challenge for maintaining and fetching up-to-date information. For thepurpose, it is required to verify whether a web page has been changed or not, which is another challenge. Therefore, a mechanism needs to be introduced for adjusting the time period between two successive revisits based on probability of updation of the web page. In thispaper, architecture is being proposed that introduces a technique to continuously update/refresh the Hidden Web repository.

Rosy Madaan; Ashutosh Dixit,; A.K. Sharma; Komal Kumar Bhatia

2010-01-01

255

VLSI architecture  

Energy Technology Data Exchange (ETDEWEB)

This book is a collection of course papers which discusses the latest (1982) milestone of electronic building blocks and its effect on computer architecture. Contributions range from selecting a VLSI process technology to Japan's Fifth Generation Computer Architecture. Contents, abridged: VLSI and machine architecture. Graphic design aids: HED and FATFREDDY. On the LUCIFER system. Clocking of VLSI circuits. Decentralised computer architectures for VLSI. Index.

Randell, B.; Treleaven, P.C.

1983-01-01

256

Symbolics architecture  

Energy Technology Data Exchange (ETDEWEB)

What is an architecture. In computer systems, an architecture is a specification of an interface. To be dignified by the name architecture, an interface should be designed for a long lifespan and should connect system components maintained by different organizations. Often an architecture is part of a product definition and defines characteristics on which purchasers of that product rely, but this is not true of everything that is called an architecture. An architecture is more formal than an internal interface between closely-related system components, and has farther-reaching effects on system characteristics and performance. A computer system typically contains many levels and types of architecture. This article discusses three architectures defined in Symbolics computers: (1) System architecture - defines how the system appears to end users and application programmers, including the characteristics of languages, user interface, and operating system. (2) Instruction architecture - defines the instruction set of the machine, the types of data that can be manipulated by those instructions, and the environment in which the instructions operate, for example subroutine calling discipline, virtual memory management, interrupts and exception traps, etc. This is an interface between the compilers and the hardware. (3) Processor architecture - defines the overall structure of the implementation of the instruction architecture. This is an interface between the firmware and the hardware, and is also an interface between the parts of the processor hardware.

Moon, D.A.

1987-01-01

257

Critical Architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This book examines the relationship between design and criticism in architecture. Placing architecture in an interdisciplinary context, the book explores architectural criticism with reference to fields such as art, cultural and literary criticism, and considers how critical practice in design opera...

Fraser, M

258

Architecture & Environment  

Science.gov (United States)

|Most art teachers would agree that architecture is an important form of visual art, but they do not always include it in their curriculums. In this article, the authors share core ideas from "Architecture and Environment," a teaching resource that they developed out of a long-term interest in teaching architecture and their fascination with the…

Erickson, Mary; Delahunt, Michael

2010-01-01

259

Performative Urban Architecture : place-making in-between architecture and socio-technical systems  

DEFF Research Database (Denmark)

The paper explores how performative urban architecture can enhance community-making and public domain using socio-technical systems and digital technologies to constitute an urban reality. Digital medias developed for the web are now increasingly occupying the urban realm as a tool for navigating the physical world e.g. as exemplified by the Google Walk Score and the mobile extension of the Google Maps to the iPhone. At the same time the development in pervasive technologies and situated computing extends the build environment with digital feedback systems that are increasingly embedded and deployed using sensor technologies opening up for new access considerations in architecture as well as the ability for a local environment to act as real-time sources of information and facilities. Starting from the NoRA pavilion for the 10th International Architecture Biennale in Venice the paper discusses the perspectives of using interactive technologies for performative objects, which are able to register the impulses of urban activity and reproduce the contexts of the city. In this way the performative environment is established as an event setting providing an embodied experience as a ‘quasi-object' that can couple relationships between architecture, humans and society. These performative relationships between digital and physical environments are seen as illustrative of the social production of space by performance and the creative production of identity. The paper reflects on the perspectives of these performative environments to understand how the urban is forged in a manifold of actions and interactions and how performative objects can mediate relationships in changing social constellations.

Thomsen, Bo Stjerne; Jensen, Ole B.

260

Chemical sensors  

Energy Technology Data Exchange (ETDEWEB)

This review of chemical sensors contains the following topics of interest: books and reviews; reviews of sensors by their type; fabrication and selectivity; data processing; thermal sensors; mass sensors (fabrication, gas sensors, and liquid sensors); electrochemical sensors (potentiometric sensors, amperometric sensors, and conductometric sensors); and optical sensors (fabrication, liquid sensors, biosensors, and gas sensors). 795 refs., 1 tab.

Janata, J.; Josowicz, M.; DeVaney, D.M. (Pacific Northwest Lab., Richland, WA (United States))

1994-06-15

 
 
 
 
261

The Simulation Intranet Architecture  

Energy Technology Data Exchange (ETDEWEB)

The Simdarion Infranet (S1) is a term which is being used to dcscribc one element of a multidisciplinary distributed and distance computing initiative known as DisCom2 at Sandia National Laboratory (http ct al. 1998). The Simulation Intranet is an architecture for satisfying Sandia's long term goal of providing an end- to-end set of scrviccs for high fidelity full physics simu- lations in a high performance, distributed, and distance computing environment. The Intranet Architecture group was formed to apply current distributed object technologies to this problcm. For the hardware architec- tures and software models involved with the current simulation process, a CORBA-based architecture is best suited to meet Sandia's needs. This paper presents the initial desi-a and implementation of this Intranct based on a three-tier Network Computing Architecture(NCA). The major parts of the architecture include: the Web Cli- ent, the Business Objects, and Data Persistence.

Holmes, V.P.; Linebarger, J.M.; Miller, D.J.; Vandewart, R.L.

1998-12-02

262

An ad hoc wireless sensor network for tele medicine applications  

International Nuclear Information System (INIS)

[en] Recent advances in embedded computing systems have led to the emergence of wireless sensor networks (SNETs), consisting of small, battery-powered motes with limited computation and radio communication capabilities. SNETs permit data gathering and computation to be deeply embedded in the physical environment. Large scale ad hoc sensor networks (ASNET), when deployed among mobile patients, can provide dynamic data query architecture to allow medical specialists to monitor patients at any place via the web or cellular network. In case of an emergency, doctors and/or nurses will be contacted automatically through their handheld personal digital assistants (PDAs) or cellular phones. In specific, the proposed network consists of sensor nodes at the first layer whose responsibility is to measure, collect and communicate, via wired or wireless interface, readings to a microcontroller presenting the second layer of architecture. Deployed microcontrollers process incoming readings and report to a central system via a wireless interface. The implemented network distinguishes between periodic sensor readings and critical or event driven readings where higher priorities is given for the latter. In this paper we implement 3 special cases for tracking and monitoring patients and doctors using SNETs. In addition, the performance of a large scale of our implementation has been tested by means of mathematical analysis. (author)

2007-01-01

263

GENERAL WEB KNOWLEDGE MINING FRAMEWORK  

Directory of Open Access Journals (Sweden)

Full Text Available Mining the web is defined as discovering knowledge from hypertext and World Wide Web. The World Wide Web is one of the longest rising areas of intelligence gathering. Now a day there are billions of web pages, HTML archive accessible via the internet, and the number is still increasing. However, considering the inspiring diversity of the web, retrieving of interestingness web based content has become a very complex task. The large amount of data heterogeneity, complex format, high dimensional data and lack of structure of web, knowledge mining is a challenging task. In this paper, it is proposed to introduce a new framework generated to handle unstructured complex data. This web knowledge mining expertise brings forward a kind of XML-based distributed data mining architecture. Based on the research of web knowledge mining, XML is used to create well structured data. Web knowledge mining framework attempts to determine useful knowledge from derived data, complex format, and high dimensional data obtained from the interactions of the users through the Web.

B. Madasamy; Dr. J. Jebmalar Tamilselvi

2012-01-01

264

Large Scale Environmental Monitoring through Integration of Sensor and Mesh Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Monitoring outdoor environments through networks of wireless sensors has received interest for collecting physical and chemical samples at high spatial and temporal scales. A central challenge to environmental monitoring applications of sensor networks is the short communication range of the sensor nodes, which increases the complexity and cost of monitoring commodities that are located in geographically spread areas. To address this issue, we propose a new communication architecture that integrates sensor networks with medium range wireless mesh networks, and provides users with an advanced web portal for managing sensed information in an integrated manner. Our architecture adopts a holistic approach targeted at improving the user experience by optimizing the system performance for handling data that originates at the sensors, traverses the mesh network, and resides at the server for user consumption. This holistic approach enables users to set high level policies that can adapt the resolution of information collected at the sensors, set the preferred performance targets for their application, and run a wide range of queries and analysis on both real-time and historical data. All system components and processes will be described in this paper.

Raja Jurdak; Abdelhamid Nafaa; Alessio Barbirato

2008-01-01

265

Tutorial: Advanced computer architecture  

Energy Technology Data Exchange (ETDEWEB)

Topics discussed in this book include existing architecture, proposed novel architectural schemes, arithmetic systems design, multiprocessors and performance evaluation, multicomputer and multiprocessor interconnection schemes, problems associated with multicomputer architecture, architectural considerations, VLSI and computer architecture, and application directed architecture.

Agrawal, D.P.

1986-01-01

266

Spider web  

Science.gov (United States)

Spiders build webs as a way to catch food. Flying and crawling insects can easily be caught in this sticky web and eaten if they aren't careful. Spiders also live on these webs and store their eggs cases on webs.

N/A N/A (U.S. Fish and Wildlife Service;)

2005-07-25

267

Distributed multi-sensor fusion  

Science.gov (United States)

McQ has developed a broad based capability to fuse information in a geographic area from multiple sensors to build a better understanding of the situation. The paper will discuss the fusion architecture implemented by McQ to use many sensors and share their information. This multi sensor fusion architecture includes data sharing and analysis at the individual sensor, at communications nodes that connect many sensors together, at the system server/user interface, and across multi source information available through networked services. McQ will present a data fusion architecture that integrates a "Feature Information Base" (FIB) with McQ's well known Common Data Interchange Format (CDIF) data structure. The distributed multi sensor fusion provides enhanced situation awareness for the user.

Scheffel, Peter; Fish, Robert; Knobler, Ron; Plummer, Thomas

2008-03-01

268

Creating Multiuser Web3D Applications Embedded in Web Pages  

Directory of Open Access Journals (Sweden)

Full Text Available It is not common to find web pages that show interactive multi-user 3D virtual environments as part of their contents without requiring special plug-ins for the web browser to be able to execute such an application. This paper presents a new architecture based on Java technology to create web portals which include 3D virtual scenarios that many users may share whose actions in that environment can incur in automatic updating of the rest of the portal's contents, without requiring any special additional software to be displayed by or installed unto any browser.

Xandre Chourio; Francisco Luengo; Gerardo Pirela

2011-01-01

269

Sensor modules for wireless distributed sensor networks  

Energy Technology Data Exchange (ETDEWEB)

A national security need as well as environmental monitoring need exists for networks of sensors. The advantages of a network of sensors over a single sensor are improved range, sensitivity, directionality, and data readability. Depending upon the particular application, sensors can be acoustic, chemical, biological, thermal or inertial. A major desire in these sensor networks is to have the individual sensor and associated electronics small and low enough in power that the battery can also be small and of long life. Smaller, low power sensor nodes can allow more nodes per network. A typical network for security applications is depicted in Figure 1. Here a number of sensor nodes are deployed around a central hub node in a star configuration. In this scenario the hubs communicate with each other and ultimately relay information to a satellite. Future networks might follow this scenario or some other network architecture such as a hopping network where individual nodes communicate directly with each other. The focus of our research has been on development of the small low power nodes and less on the overall network topology. However, some consideration of the network must be given when designing the nodes and some consideration of the nodes must be given when designing the network. An individual sensor node contains not only the sensor but also the sensor interface electronics, analog to digital (A/D) converter, logic, RF communication link, antenna, and the battery. Future nodes will also contain some form of signal processing to allow more sophisticated network architectures. The FY98 goal for this project was to make a sensor node with a physical form factor of a 2 inch x 2 inch x 2 inch cube.

Lee, A P; McConaghy, C F; Simon, J N; Benett, W; Jones, L; Trevino, J

1999-02-22

270

Early Performance Prediction of Web Services  

CERN Multimedia

Web Service is an interface which implements business logic. Performance is an important quality aspect of Web services because of their distributed nature. Predicting the performance of web services during early stages of software development is significant. In this paper we model web service using Unified Modeling Language, Use Case Diagram, Sequence Diagram, Deployment Diagram. We obtain the Performance metrics by simulating the web services model using a simulation tool Simulation of Multi-Tier Queuing Architecture. We have identified the bottle neck resources.

Reddy, Ch Ram Mohan; Srinivasa, K G; Kumar, T V Suresh; Kanth, K Rajani

2012-01-01

271

Programming Web Services with SOAP  

CERN Document Server

The web services architecture provides a new way to think about and implement application-to-application integration and interoperability that makes the development platform irrelevant. Two applications, regardless of operating system, programming language, or any other technical implementation detail, communicate using XML messages over open Internet protocols such as HTTP or SMTP. The Simple Open Access Protocol (SOAP) is a specification that details how to encode that information and has become the messaging protocol of choice for Web services.Programming Web Services with SOAP is a detail

Snell, James L; Kulchenko, Pavel

2002-01-01

272

Design Distributed Database Strategies for SQMD Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Database is not static but rapidly grows in size. These issues include how to allocate data, communication of the system, the coordination among the individual system, distributed transition control and query processing, concurrency control over distributed relation, design of global user interface, design of component system in different physical location, integration of existing database system security. The system architecture makes use of software portioning of the database based on data clustering, SQMD (Single Query Multiple Database) architecture, a web services interface and virtualization software technologies. The system allows uniform access to concurrently distributed database, using SQMD architecture. In this Paper explain Design Strategies of Distributed Database for SQMD architecture.

Shailesh R. Thakare; C.A. Dhawale; Ajay B.Gadicha

2011-01-01

273

Evolving towards better architectures for remote laboratories: a practical case  

Directory of Open Access Journals (Sweden)

Full Text Available A WebLab is a remote laboratory controlled via Internet. Traditionally, the focus on WebLab design has been placed on the hardware side and the communication link between the controlling PC (WebLab server) and the hardware prototype. Little attention has been paid to the other communication segment going from the WebLab server to the remote users’ PCs, since this has been regarded as a “solved software problem”. Consequently, aspects such as security, scalability, accessibility, or user friendliness have often been disregarded in WebLabs. This situation may be solved if a serious effort is placed on the definition of proper distributed software architectures for WebLabs. In this paper, we describe such ideal software architecture, resulted from an iterative process seeking a web-based, secure, scalable, multi-user, multi-device WebLab.

Javier Garcia-Zubia; Diego Lopez-de-Ipiña; Pablo Orduña

2005-01-01

274

Web Engineering  

CERN Document Server

Web Engineering is the application of systematic, disciplined and quantifiable approaches to development, operation, and maintenance of Web-based applications. It is both a pro-active approach and a growing collection of theoretical and empirical research in Web application development. This paper gives an overview of Web Engineering by addressing the questions: a) why is it needed? b) what is its domain of operation? c) how does it help and what should it do to improve Web application development? and d) how should it be incorporated in education and training? The paper discusses the significant differences that exist between Web applications and conventional software, the taxonomy of Web applications, the progress made so far and the research issues and experience of creating a specialisation at the master's level. The paper reaches a conclusion that Web Engineering at this stage is a moving target since Web technologies are constantly evolving, making new types of applications possible, which in turn may r...

Deshpande, Y; Ginige, A; Hansen, S; Schwabe, D; Gaedke, M; White, B; Deshpande, Yogesh; Murugesan, San; Ginige, Athula; Hansen, Steve; Schwabe, Daniel; Gaedke, Martin; White, Bebo

2003-01-01

275

Customisable Scientific Web Portal for Fusion Research  

Energy Technology Data Exchange (ETDEWEB)

The Web browser has become one of the major application interfaces for remotely participating in magnetic fusion. Web portals are used to present very diverse sources of information in a unified way. While a web portal has several benefits over other software interfaces, such as providing single point of access for multiple computational services, and eliminating the need for client software installation, the design and development of a web portal has unique challenges. One of the challenges is that a web portal needs to be fast and interactive despite a high volume of tools and information that it presents. Another challenge is the visual output on the web portal often is overwhelming due to the high volume of data generated by complex scientific instruments and experiments; therefore the applications and information should be customizable depending on the needs of users. An appropriate software architecture and web technologies can meet these problems. A web-portal has been designed to support the experimental activities of DIII-D researchers worldwide. It utilizes a multi-tier software architecture, and web 2.0 technologies, such as AJAX, Django, and Memcached, to develop a highly interactive and customizable user interface. It offers a customizable interface with personalized page layouts and list of services for users to select. Customizable services are: real-time experiment status monitoring, diagnostic data access, interactive data visualization. The web-portal also supports interactive collaborations by providing collaborative logbook, shared visualization and online instant message services. Furthermore, the web portal will provide a mechanism to allow users to create their own applications on the web portal as well as bridging capabilities to external applications such as Twitter and other social networks. In this series of slides, we describe the software architecture of this scientific web portal and our experiences in utilizing web 2.0 technologies. A live demonstration of the system also is presented as well as user feedback from the 2009 DIII-D Experimental Campaign. (authors)

Abla, G.; Kim, E.; Schissel, D.; Flannagan, S. [General Atomics, San Diego (United States)

2009-07-01

276

Customisable Scientific Web Portal for Fusion Research  

International Nuclear Information System (INIS)

The Web browser has become one of the major application interfaces for remotely participating in magnetic fusion. Web portals are used to present very diverse sources of information in a unified way. While a web portal has several benefits over other software interfaces, such as providing single point of access for multiple computational services, and eliminating the need for client software installation, the design and development of a web portal has unique challenges. One of the challenges is that a web portal needs to be fast and interactive despite a high volume of tools and information that it presents. Another challenge is the visual output on the web portal often is overwhelming due to the high volume of data generated by complex scientific instruments and experiments; therefore the applications and information should be customizable depending on the needs of users. An appropriate software architecture and web technologies can meet these problems. A web-portal has been designed to support the experimental activities of DIII-D researchers worldwide. It utilizes a multi-tier software architecture, and web 2.0 technologies, such as AJAX, Django, and Memcached, to develop a highly interactive and customizable user interface. It offers a customizable interface with personalized page layouts and list of services for users to select. Customizable services are: real-time experiment status monitoring, diagnostic data access, interactive data visualization. The web-portal also supports interactive collaborations by providing collaborative logbook, shared visualization and online instant message services. Furthermore, the web portal will provide a mechanism to allow users to create their own applications on the web portal as well as bridging capabilities to external applications such as Twitter and other social networks. In this series of slides, we describe the software architecture of this scientific web portal and our experiences in utilizing web 2.0 technologies. A live demonstration of the system also is presented as well as user feedback from the 2009 DIII-D Experimental Campaign. (authors)

2009-01-01

277

Business Intelligence from Web Usage Mining  

CERN Multimedia

The rapid e-commerce growth has made both business community and customers face a new situation. Due to intense competition on one hand and the customer's option to choose from several alternatives business community has realized the necessity of intelligent marketing strategies and relationship management. Web usage mining attempts to discover useful knowledge from the secondary data obtained from the interactions of the users with the Web. Web usage mining has become very critical for effective Web site management, creating adaptive Web sites, business and support services, personalization, network traffic flow analysis and so on. In this paper, we present the important concepts of Web usage mining and its various practical applications. We further present a novel approach 'intelligent-miner' (i-Miner) to optimize the concurrent architecture of a fuzzy clustering algorithm (to discover web data clusters) and a fuzzy inference system to analyze the Web site visitor trends. A hybrid evolutionary fuzzy cluster...

Abraham, A

2004-01-01

278

Semantic Web Semantic Web  

Directory of Open Access Journals (Sweden)

Full Text Available The semantic Web is a technology at the service of knowledge which is aimed at accessibility and the sharing of content; facilitating interoperability between different systems and as such is one of the nine key technological pillars of TIC (technologies for information and communication) within the third theme, programme specific cooperation of the seventh programme framework for research and development (7°PQRS, 2007-2013). As a system it seeks to overcome overload or excess of irrelevant information in Internet, in order to facilitate specific or pertinent research. It is an extension of the existing Web in which the aim is for cooperation between and the computer and people (the dream of Sir Tim Berners –Lee) where machines can give more support to people when integrating and elaborating data in order to obtain inferences and a global sharing of data. It is a technology that is able to favour the development of a “data web” in other words the creation of a space in both sets of interconnected and shared data (Linked Data) which allows users to link different types of data coming from different sources. It is a technology that will have great effect on everyday life since it will permit the planning of “intelligent applications” in various sectors such as education and training, research, the business world, public information, tourism, health, and e-government. It is an innovative technology that activates a social transformation (socio-semantic Web) on a world level since it redefines the cognitive universe of users and enables the sharing not only of information but of significance (collective and connected intelligence).The semantic Web is a technology at the service of knowledge which is aimed at accessibility and the sharing of content; facilitating interoperability between different systems and as such is one of the nine key technological pillars of TIC (technologies for information and communication) within the third theme, programme specific cooperation of the seventh programme framework for research and development (7°PQRS, 2007-2013). As a system it seeks to overcome overload or excess of irrelevant information in Internet, in order to facilitate specific or pertinent research. It is an extension of the existing Web in which the aim is for cooperation between and the computer and people (the dream of Sir Tim Berners –Lee) where machines can give more support to people when integrating and elaborating data in order to obtain inferences and a global sharing of data. It is a technology that is able to favour the development of a “data web” in other words the creation of a space in both sets of interconnected and shared data (Linked Data) which allows users to link different types of data coming from different sources. It is a technology that will have great effect on everyday life since it will permit the planning of “intelligent applications” in various sectors such as education and training, research, the business world, public information, tourism, health, and e-government. It is an innovative technology that activates a social transformation (socio-semantic Web) on a world level since it redefines the cognitive universe of users and enables the sharing not only of information but of significance (collective and connected intelligence).

Anna Lamandini

2011-01-01

279

Maximum Spanning Tree Model on Personalized Web Based Collaborative Learning in Web 3.0  

CERN Multimedia

Web 3.0 is an evolving extension of the current web environme bnt. Information in web 3.0 can be collaborated and communicated when queried. Web 3.0 architecture provides an excellent learning experience to the students. Web 3.0 is 3D, media centric and semantic. Web based learning has been on high in recent days. Web 3.0 has intelligent agents as tutors to collect and disseminate the answers to the queries by the students. Completely Interactive learner's query determine the customization of the intelligent tutor. This paper analyses the Web 3.0 learning environment attributes. A Maximum spanning tree model for the personalized web based collaborative learning is designed.

Padma, S

2012-01-01

280

A Web-Based Integration Procedure for the Development of Reconfigurable Robotic Work-Cells  

Directory of Open Access Journals (Sweden)

Full Text Available Concepts related to the development of reconfigurable manufacturing systems (RMS) and methodologies to provide the best practices in the processing industry and factory automation, such as system integration and web?based technology, are major issues in designing next?generation manufacturing systems (NGMS). Adaptable and integrable devices are crucial for the success of NGMS. In robotic cells the integration of manufacturing components is essential to accelerate system adaptability. Sensors, control architectures and communication technologies have contributed to achieving further agility in reconfigurable factories. In this work a web?based robotic cell integration procedure is proposed to aid the identification of reconfigurable issues and requirements. This methodology is applied to an industrial robot manipulator to enhance system flexibility towards the development of a reconfigurable robotic platform.

Paulo Ferreira; Victoria Reyes; Joa?o Mestre

2013-01-01

 
 
 
 
281

Cooperative Mobile Web Browsing  

DEFF Research Database (Denmark)

This paper advocates a novel approach for mobile web browsing based on cooperation among wireless devices within close proximity operating in a cellular environment. In the actual state of the art, mobile phones can access the web using different cellular technologies. However, the supported data rates are not sufficient to cope with the ever increasing trafic requirements resulting from advanced and rich content services. Extending the state of the art, higher data rates can only be achieved by increasing complexity, cost, and energy consumption of mobile phones. In contrast to the linear extension of current technology, we propose a novel architecture where mobile phones are grouped together in clusters, using a short-range communication such as Bluetooth, sharing, and accumulating their cellular capacity. The accumulated data rate resulting from collaborative interactions over short-range links can then be used for cooperative mobile web browsing. By implementing the cooperative web browsing on commercial mobile phones, it will be shown that better performance is achieved in terms of increased data rate and therefore reduced access times, resulting in a significantly enhanced web browsing user experience on mobile phones. Copyright (C) 2009 G. P. Perrucci et al.

Perrucci, GP; Fitzek, FHP

2009-01-01

282

Cooperative Mobile Web Browsing  

Directory of Open Access Journals (Sweden)

Full Text Available This paper advocates a novel approach for mobile web browsing based on cooperation among wireless devices within close proximity operating in a cellular environment. In the actual state of the art, mobile phones can access the web using different cellular technologies. However, the supported data rates are not sufficient to cope with the ever increasing traffic requirements resulting from advanced and rich content services. Extending the state of the art, higher data rates can only be achieved by increasing complexity, cost, and energy consumption of mobile phones. In contrast to the linear extension of current technology, we propose a novel architecture where mobile phones are grouped together in clusters, using a short-range communication such as Bluetooth, sharing, and accumulating their cellular capacity. The accumulated data rate resulting from collaborative interactions over short-range links can then be used for cooperative mobile web browsing. By implementing the cooperative web browsing on commercial mobile phones, it will be shown that better performance is achieved in terms of increased data rate and therefore reduced access times, resulting in a significantly enhanced web browsing user experience on mobile phones.

G. P. Perrucci; F. H. P. Fitzek; Q. Zhang; M. D. Katz

2009-01-01

283

Innovative Approach for Wireless Health Monitoring System Using Client-Server Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Real Time Patients health monitoring system with wireless sensor network using soft computing is an innovative idea. It also generates predication on patient’s health condition based on summation of all medical records of patient. It offers anytime and anywhere remote monitoring of patients. In this wireless architecture, many to many relationship between client (patient) and server (doctor) are established and various types of communication scheme are used between them. Apart from monitoring patient’s health, wrist worn device provide few auxiliary functions that fulfil the living demands of patients and it uses various types of sensors to acquire continuous vital signs of patients including blood pressure, heart rate, SpO2 and body temperature. Transmission of this digital data over internet is done using general packet radio service to web server where database are stored. Generated predication will be displayed on web application. With the help of web application authorized medical staff and doctors can easily access patient’s medical graph and generated predication. Based on this the doctor can give advice message to patient instantly using internet service and set new threshold for various medical parameter if needed.A prototype system consist of data gathering, analysis, and emergency detection phase in distributed manner and PHP(hypertext pre-processor) based client server communication in which main server has centralized control over all entities.

Ms. Poonam Agrawal

2013-01-01

284

Energy Consumption Control of an Air Conditioner Using Web Services  

Directory of Open Access Journals (Sweden)

Full Text Available Air-conditioning (AC) systems have the highest power consumption among the appliances and consumer devices used at residential homes and buildings. Reducing their energy use will lower peak time usage and lower CO2 emissions. Recently, employment of the Information and Communications Technologies (ICT) to the power grid has smartened the grid. In the smart grid new opportunities emerge for AC energy consumption control. The aim of this paper is to reduce the air conditioning energy consumption of residential customers. It proposes an architecture that provides easy management and control using sensor network web services. A simulation thermal model of a house considers house data and outside temperature is presented. Simulation results showed a proposed temperature control method can have significant energy saving while maintaining customer comfort.

Asaad Elmoudi; Omar Asad; Melike Erol-Kantarci; Hussein Talaat Mouftah

2011-01-01

285

Food Webs  

Science.gov (United States)

The representation depicts 4 different food webs: Antarctica, the African Grasslands, the Australia Grasslands and a Marine environment. A separate food web for scavengers and decomposers is present in the African Grasslands section. Viewers must first build the web by moving boxes with the organism's picture and name to the appropriate spot on a grid. Clues describing food requirements are given as the boxes are moved. When the boxes are correctly placed a complete food web (with arrows) is displayed.

286

Pervasive monitoring--an intelligent sensor pod approach for standardised measurement infrastructures.  

UK PubMed Central (United Kingdom)

Geo-sensor networks have traditionally been built up in closed monolithic systems, thus limiting trans-domain usage of real-time measurements. This paper presents the technical infrastructure of a standardised embedded sensing device, which has been developed in the course of the Live Geography approach. The sensor pod implements data provision standards of the Sensor Web Enablement initiative, including an event-based alerting mechanism and location-aware Complex Event Processing functionality for detection of threshold transgression and quality assurance. The goal of this research is that the resultant highly flexible sensing architecture will bring sensor network applications one step further towards the realisation of the vision of a "digital skin for planet earth". The developed infrastructure can potentially have far-reaching impacts on sensor-based monitoring systems through the deployment of ubiquitous and fine-grained sensor networks. This in turn allows for the straight-forward use of live sensor data in existing spatial decision support systems to enable better-informed decision-making.

Resch B; Mittlboeck M; Lippautz M

2010-01-01

287

Pervasive monitoring--an intelligent sensor pod approach for standardised measurement infrastructures.  

Science.gov (United States)

Geo-sensor networks have traditionally been built up in closed monolithic systems, thus limiting trans-domain usage of real-time measurements. This paper presents the technical infrastructure of a standardised embedded sensing device, which has been developed in the course of the Live Geography approach. The sensor pod implements data provision standards of the Sensor Web Enablement initiative, including an event-based alerting mechanism and location-aware Complex Event Processing functionality for detection of threshold transgression and quality assurance. The goal of this research is that the resultant highly flexible sensing architecture will bring sensor network applications one step further towards the realisation of the vision of a "digital skin for planet earth". The developed infrastructure can potentially have far-reaching impacts on sensor-based monitoring systems through the deployment of ubiquitous and fine-grained sensor networks. This in turn allows for the straight-forward use of live sensor data in existing spatial decision support systems to enable better-informed decision-making. PMID:22163537

Resch, Bernd; Mittlboeck, Manfred; Lippautz, Michael

2010-12-13

288

Service-oriented high level architecture  

CERN Document Server

Service-oriented High Level Architecture (SOHLA) refers to the high level architecture (HLA) enabled by Service-Oriented Architecture (SOA) and Web Services etc. techniques which supports distributed interoperating services. The detailed comparisons between HLA and SOA are made to illustrate the importance of their combination. Then several key enhancements and changes of HLA Evolved Web Service API are introduced in comparison with native APIs, such as Federation Development and Execution Process, communication mechanisms, data encoding, session handling, testing environment and performance analysis. Some approaches are summarized including Web-Enabling HLA at the communication layer, HLA interface specification layer, federate interface layer and application layer. Finally the problems of current research are discussed, and the future directions are pointed out.

Wang, Wenguang; Li, Qun; Wang, Weiping; Liu, Xichun

2009-01-01

289

Small-angle X-ray scattering reveals architecture and A?B? stoichiometry of the UvrA-UvrB DNA damage sensor.  

UK PubMed Central (United Kingdom)

The UvrA-UvrB (AB) protein complex operates in the bacterial nucleotide excision repair pathway as the main sensor of DNA damage. Crystallographic analysis of the AB complex revealed a linear UvrB-UvrA-UvrA-UvrB arrangement of subunits with an internal two-fold axis that became incorporated into the crystal. Here, we have used small-angle X-ray scattering (SAXS) to show close correspondence between the crystal structure and the entity in solution. This result confirms the number and disposition of subunits in the crystallographic model and rules out other possible arrangements suggested by packing in the crystal. The current SAXS analysis failed to detect significant changes to the structure as a function of nucleotide.

Pakotiprapha D; Jeruzalmi D

2013-01-01

290

An Architectural Style for Ajax  

CERN Multimedia

A new breed of web application, dubbed AJAX, is emerging in response to a limited degree of interactivity in large-grain stateless Web interactions. At the heart of this new approach lies a single page interaction model that facilitates rich interactivity. We have studied and experimented with several AJAX frameworks trying to understand their architectural properties. In this paper, we summarize three of these frameworks and examine their properties and introduce the SPIAR architectural style. We describe the guiding software engineering principles and the constraints chosen to induce the desired properties. The style emphasizes user interface component development, and intermediary delta-communication between client/server components, to improve user interactivity and ease of development. In addition, we use the concepts and principles to discuss various open issues in AJAX frameworks and application development.

Mesbah, A; Mesbah, Ali; Deursen, Arie van

2006-01-01

291

Semantic Interoperability of Sensor Data with Volunteered Geographic Information: A Unified Model  

Directory of Open Access Journals (Sweden)

Full Text Available The increasing availability of sensor devices has resulted in important volumes of sensor data, which has raised the issue of making these data fully discoverable and interpretable by applications and end-users. The idea of OGC Sensor Web Enablement (SWE) has addressed this issue by proposing a set of standards to enable accessibility of sensor data over the Web. Similarly, there is a growing interest in volunteered geographic information (VGI). Considering that several researchers have highlighted the potential of this new type of information as a complement to existing, “traditional” data, it becomes important to develop frameworks to support the integration of VGI from several sources and with other types of data. In this paper, we make a first step in this direction by proposing a framework for the semantic interoperability of sensor data and VGI. After having performed an investigation of the types of VGI applications, we have developed a conceptual model of VGI aligned with relevant ISO standards for describing geospatial features. The purpose of this model is to support the generation of common descriptions for VGI applications, which will act as interfaces to higher-level services, such as discovery and reasoning services, in order to be exploited in conjunction with sensor data by client applications. This process is described through architecture for semantic interoperability of sensor data and VGI that we have developed and that we intend to use to set guidelines for future research on integration of VGI in sensor data cyberinfrastructures. We illustrate the possibilities created by the proposed framework with a description of the various services and interfaces required to implement the framework.

Mohamed Bakillah; Steve H.L. Liang; Alexander Zipf; Jamal Jokar Arsanjani

2013-01-01

292

Pressure sensor. Atsuryoku sensor  

Energy Technology Data Exchange (ETDEWEB)

Representing pressure sensors are selected for explanation out of various kinds of pressure sensors which have been put to practical use. in connection with the types of pressure sensors, the thin film semiconductor strain gauge pressure sensor, diffusion semiconductor strain gauge pressure sensor, and electrical capacitance pressure sensor are compared and explained. In addition, future trend and development of pressure sensors are discussed. Metals and semiconductors are used now as the resistors for strain gauges, which are classified into the paste type, deposition type, and diffusion type. Ceramics, silicon, and metals are used as diaphragm materials for the electrical capacitance pressure sensor. Easily machinable metallic diaphragms are used for thin film semiconductor strain gauge pressure sensors, and the sensors have high reliability and wide fields of application because of the structure with integrated sensing members and pressure connecting members. The future problems for the pressure sensor are miniaturization and the reduction in the cost. 5 refs., 5 figs.

Kiuchi, M. (Nagano Keiki Seisakusho Ltd., Tokyo (Japan))

1992-09-15

293

Una arquitectura y mapa de ruta para un método de detección de debris flows y fenómenos similares en ríos, mediante una red de sensores inalámbricos An architecture and a roadmap for a detection method for debris flows and similar phenomena in rivers, using a wireless sensor network  

Directory of Open Access Journals (Sweden)

Full Text Available Los debris flows y flujos hiperconcentrados, conocidos popularmente como cabezas de agua, aluviones o avenidas de lodo, son fenómenos muy destructivos que afectan a poblaciones ubicadas en márgenes de ríos. Los sistemas utilizados para detectar este tipo de eventos se basan en instrumentación fija en puntos determinados del río o a través de mediciones remotas e indirectas, por lo cual los datos que suministran son limitados: no brindan información en tiempo real sobre la posición o velocidad del evento más allá de los puntos de monitoreo. En este artículo se propone una arquitectura para la detección de debris flows y flujos hiperconcentrados en cuencas de ríos, por medio de una red inalámbrica de sensores móviles. La arquitectura propuesta es distribuida y descentralizada, pues no depende de un ente coordinador central para decidir sobre la presencia o ausencia del fenómeno. También se plantea un mapa de ruta de los problemas que deben superarse, con el fin de hacer posible la implementación de esta arquitectura en un sistema de detección concreto para los ríos.Debris flows and hiperconcentrated flows are very destructive phenomena that cause damage, injures and deaths to property and persons that live near rivers. Existing warning systems for these phenomena are based on fixed instrumentation on certain points of the river, or on remote, indirect measurements. As a result, the information that they provide is limited, neither real-time data about the advance of the flow trough the river, nor its velocity outside the fixed monitoring points is available. In this article, an architecture for a debris flows and hiperconcentrated flows detection method based on a wireless sensor network is proposed. This architecture is distributed and decentralized, since it does not depend on a central coordinator to decide on the presence or absence of the phenomenon. A roadmap for further research is also proposed, in order to solve challenges and problems that must be overcome in order to make possible an implementation of this architecture in a real world detection system.

Oscar Vargas Fallas; Francisco Torres Rojas

2013-01-01

294

Parallel architectures and computer vision  

Energy Technology Data Exchange (ETDEWEB)

The computer interpretation of visual images offers unlimited potential, with applications ranging from robotics and manufacturing to electronic sensors for the seeing-impaired. But in order to work effectively, computers will have to sense and analyze visual scenes in a fraction of a second-far beyond current capabilities. The future lies in the use of massive parallel architectures, with perhaps thousands of processors cooperating on the task. The advances now being made in VLSI technology may allow such parallelism to be economically feasible. This book presents work researchers in parallel architectures and computer vision from both industry and academia.

Page, I. (Univ. of Oxford (GB))

1988-01-01

295

A Web Crawler System Design Based on Distributed Technology  

Directory of Open Access Journals (Sweden)

Full Text Available A practical distributed web crawler architecture is designed. The distributed cooperative grasping algorithm is put forward to solve the problem of distributed Web Crawler grasping. Log structure and Hash structure are combined and a large-scale web store structure is devised, which can meet not only the need of a large amount of random accesses, but also the need of newly added pages. Experiment results have shown that the distributed Web Crawler's performance, scalability, and load balance are better.

Shaojun Zhong; Zhijuan Deng

2011-01-01

296

Guide to web development with Java  

CERN Multimedia

This comprehensive textbook introduces readers to the three-tiered, Model-View-Controller (MVC) architecture by using Hibernate, JSPs, and Java Servlets. These three technologies all use Java, so that a student with a background in programming will be able to master them with ease, with the end result of being able to create web applications that use MVC, validate user input and save data to a database. Features: presents the many topics of web development in small steps, in an accessible, easy-to-follow style; uses powerful technologies that are freely available on the web to speed up web dev

Downey, Tim

2012-01-01

297

Islamic Arts and Architecture Organization  

Science.gov (United States)

Created and sustained by the Islamic Arts and Architecture Organization (IAAO), a nonprofit organization seeking to encourage the study of Islamic arts research, this Web site not only provides information on Islamic arts and architecture, but also distinguishes the relationship between Islamic arts and other academic disciplines. For students, scholars, researchers, and all others interested in Islamic art and culture, this site is equipped with a comprehensive bibliography, a chronological listing of historical events, a listing of all academic schools and institutes around the world that teach Islamic arts and/or architecture, and a worldwide listing of museums showcasing Islamic exhibits. Additionally, the site contains wallpaper and screen saver downloads equipped with Islamic desktop themes and Islamic greeting cards that can be sent to a friend, associate, or family member.

1995-01-01

298

Software Architectures  

UK PubMed Central (United Kingdom)

This short paper accompanies the "Software Architectures" presentation of the "Shared VR"course in SIGGRAPH'99. Both the paper and the presentation focus on the development ofsoftware architectures for shared virtual environments. This paper/presentation only considerssoftware architectures in a general sense as it assumes that specific toolkits are covered in the"History of Shared VR Systems" section, to be presented just before this paper's presentation. Ifno paper accompanies that presentation, please see this [1] (slightly biased) summary.IntroductionThe development of shared virtual environment (VE) applications has been of academic andcommercial interest ever since the advent of networking and three dimensional (3D) graphics.These applications are typically written from scratch on top of the low-level system and graphicslibraries. Only recently have standard, higher-level graphics libraries, such as Fahrenheit [3],providing cross-platform scenegraph construction and ...

Kent Watsen

299

IAIMS architecture.  

UK PubMed Central (United Kingdom)

An information system architecture defines the components of a system and the interfaces among the components. A good architecture is essential for creating an Integrated Advanced Information Management System (IAIMS) that works as an integrated whole yet is flexible enough to accommodate many users and roles, multiple applications, changing vendors, evolving user needs, and advancing technology. Modularity and layering promote flexibility by reducing the complexity of a system and by restricting the ways in which components may interact. Enterprise-wide mediation promotes integration by providing message routing, support for standards, dictionary-based code translation, a centralized conceptual data schema, business rule implementation, and consistent access to databases. Several IAIMS sites have adopted a client-server architecture, and some have adopted a three-tiered approach, separating user interface functions, application logic, and repositories.

Hripcsak G

1997-03-01

300

Materials architecture  

Energy Technology Data Exchange (ETDEWEB)

The theme of this sumposium ''Materials Architecture'' should be taken to be a broader from of what is usually understood by microstructure. In this sense materials architecture is concerned with the design of all aspects of the microstructure, texture and also some aspects of the macrostructure. The materreials architecture governs the mechanical and physical properties of engineering materials. All classes of materials are covered within this framwork: metals, ceramics, polymers, amorphous materials, composites. Among the subthemes of the symposium are: mechanical behaviour and deformation mechanicsms, mechanisms of strengthening, annealing processes and engineering properties. The increasing importance of materials in modern society is discussed in a wider framework. The themes covered comprise specific materials and materials processing, resources, industrial research and development, international cooperation and educational aspects. (CLS).

Bilde-Soerensen, J.B.; Hansen, N.; Juul Jensen, D.; Leffers, T.; Lilholt, H.; Pedersen, O.B. (eds.)

1989-01-01

 
 
 
 
301

The Victorian Web  

Science.gov (United States)

Based at Nagoya University in Japan, The Victorian Web presents a wide range of materials on the times and mores of this historical era. The materials are arranged into over one dozen sections, including "Technology", "Religion", and "Authors". Clicking on each of these areas will reveal a set of additional links that contain thematic essays and visual materials that address each theme. Visitors should also note that there is a "What's New?" area that contains the latest updates to the site. The "Bibliography" area is a good resource for young scholars, and it contains listings on "Readings in Victorian Religion", "Victorian Architecture", and "Science and Society in Victorian Britain".

302

Communication Buses and Protocols for Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper overviews existing digital communication buses which are commonly used in sensor networks, discusses sensor network architectures, and introduces a new sensor bus for low power microsystem applications. The new intra-module multi-element microsystem (IM2) bus is nine-line interface with 8...

Junwei Zhou; Andrew Mason

303

A testbed for sensor service networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Working towards 'plug and measure' in sensor networks for environmental monitoring with Open Geospatial Consortium (OGC) standards, the SANY (Sensors Anywhere) project specifies an architecture for all kinds of fixed and moving sensors. This will allow both seamless plug-and measure capability for s...

Usländer, T.; Watson, K.

304

Advanced border monitoring sensor system  

Science.gov (United States)

McQ has developed an advanced sensor system tailored for border monitoring that has been delivered as part of the SBInet program for the Department of Homeland Security (DHS). Technology developments that enhance a broad range of features are presented in this paper, which address the overall goal of the system to improving unattended ground sensor system capabilities for border monitoring applications. Specifically, this paper addresses a system definition, communications architecture, advanced signal processing to classify targets, and distributed sensor fusion processing.

Knobler, Ronald A.; Winston, Mark A.

2008-05-01

305

Biofilm Architecture.  

UK PubMed Central (United Kingdom)

: Microbial biofilms are complex self-organized communities of microbial cells that provide protective environments for the cells that inhabit the biofilm, enabling them to respond efficiently to challenges. The enhanced resistance and altered metabolism of the cells in the biofilm makes biofilms potentially very useful in chemical production processes, including the production of pharmaceuticals and biofuels. Synthetic biofilms in which the composition and architecture of the biofilm is controlled by the designer could help in harnessing this potential. In this chapter we discuss biofilm architecture, how it can be created by natural or artificial means, and how it affects biofilm function.

Schuster JJ; Markx GH

2013-09-01

306

Probabilistic Semantic Web Mining Using Artificial Neural Analysis  

CERN Multimedia

Most of the web user's requirements are search or navigation time and getting correctly matched result. These constrains can be satisfied with some additional modules attached to the existing search engines and web servers. This paper proposes that powerful architecture for search engines with the title of Probabilistic Semantic Web Mining named from the methods used. With the increase of larger and larger collection of various data resources on the World Wide Web (WWW), Web Mining has become one of the most important requirements for the web users. Web servers will store various formats of data including text, image, audio, video etc., but servers can not identify the contents of the data. These search techniques can be improved by adding some special techniques including semantic web mining and probabilistic analysis to get more accurate results. Semantic web mining technique can provide meaningful search of data resources by eliminating useless information with mining process. In this technique web servers...

Kishore, T Krishna; Narayana, N Lakshmi

2010-01-01

307

WEB SERVICE  

Directory of Open Access Journals (Sweden)

Full Text Available Negli ultimi anni, i maggiori produttori di software hanno focalizzato la loro attenzione sullo sviluppo e la standardizzazione di soluzioni mirate a integrare applicazioni web, indipendentemente dalla loro im¬plementazione tecnologica. I conseguenti straordinari investimenti sono giustificati dalle nuove grandi opportunità offerta dai mercati B2B e B2C. I Web Service sono il risultato di tale sforzo e sono da consi¬derare come il prossimo passo nell’evoluzione del World Wide Web.During the last years most of the major software producers have focused on the development and stan¬dardization of solution aimed to integrate web applications, regardless of their implementation technol¬ogy. The resulting remarkable investments are justified by the great new opportunities opened in the B2B and B2C markets. Web Service are the result of such efforts and are considered as the next step in the evolution of the World Wide Web.

Alex Manzo

2007-01-01

308

Wireless sensor communications and internet connectivity for sensor networks  

Energy Technology Data Exchange (ETDEWEB)

A wireless sensor network architecture is an integrated hardware/software solution that has the potential to change the way sensors are used in a virtually unlimited range of industries and applications. By leveraging Bluetooth wireless technology for low-cost, short-range radio links, wireless sensor networks such as CrossNet{sup TM} enable users to create wireless sensor networks. These wireless networks can link dozens or hundreds of sensors of disparate types and brands with data acquisition/analysis systems, such as handheld devices, internet-enabled laptop or desktop PCs. The overwhelming majority of sensor applications are hard-wired at present, and since wiring is often the most time-consuming, tedious, trouble-prone and expensive aspect of sensor applications, users in many fields will find compelling reasons to adopt the wireless sensor network solution. (orig.)

Dunbar, M. [Crossbow Technology, Inc., San Jose, CA (United States)

2001-07-01

309

Modular intelligent sensor system  

Energy Technology Data Exchange (ETDEWEB)

This paper describes a sensor system architecture suitable for application in systems intended for battery powered unattended use. The modularity concept addresses the logical interconnects between modules, the electrical interconnects between modules, and a system for the generalization of data to permit modular processing.

Fuess, D.A.

1993-06-17

310

Customized CMOS wavefront sensor  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We report on an integrated Hartmann wavefront sensor (WFS) using passive-pixel architecture and pixels clustered as position-sensitive detectors for dynamic wavefront analysis. This approach substitutes a conventional imager, such as a CCD or CMOS imager, by a customized detector, thus improving the...

Monteiro, D. W. L.; Vdovin, G.; Rocha, J. G.; Iordanov, V.; Loktev, M.; Sarro, P.

311

Modular intelligent sensor system  

Energy Technology Data Exchange (ETDEWEB)

This paper describes a sensor system architecture suitable for application in systems intended for battery powered unattended use. The modularity concept addresses the logical interconnects between modules, the electrical interconnects between modules, and a system for the generalization of data to permit modular processing.

Fuess, D.A. [Lawrence Livermore National Lab., CA (United States)

1993-12-31

312

Web Engineering  

Energy Technology Data Exchange (ETDEWEB)

Web Engineering is the application of systematic, disciplined and quantifiable approaches to development, operation, and maintenance of Web-based applications. It is both a pro-active approach and a growing collection of theoretical and empirical research in Web application development. This paper gives an overview of Web Engineering by addressing the questions: (a) why is it needed? (b) what is its domain of operation? (c) how does it help and what should it do to improve Web application development? and (d) how should it be incorporated in education and training? The paper discusses the significant differences that exist between Web applications and conventional software, the taxonomy of Web applications, the progress made so far and the research issues and experience of creating a specialization at the master's level. The paper reaches a conclusion that Web Engineering at this stage is a moving target since Web technologies are constantly evolving, making new types of applications possible, which in turn may require innovations in how they are built, deployed and maintained.

White, Bebo

2003-06-23

313

Security Model For Service-Oriented Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available In this article, we examine how security applies to Service Oriented Architecture (SOA). Before we discuss security for SOA, lets take a step back and examine what SOA is. SOA is an architectural approach which involves applications being exposed as "services". Originally, services in SOA were associated with a stack of technologies which included SOAP, WSDL, and UDDI. This article addresses the defects of traditional enterprise application integration by combining service oriented-architecture and web service technology. Application integration is then simplified to development and integration of services to tackle connectivity of isomerous enterprise application integration, security, loose coupling between systems and process refactoring and optimization.

Oldooz Karimi

2011-01-01

314

Towards physical laws for software architecture  

CERN Multimedia

Starting from the pioneering works on software architecture precious guidelines have emerged to indicate how computer programs should be organized. For example the "separation of concerns" suggests to split a program into modules that overlap in functionality as little as possible. However these recommendations are mainly conceptual and are thus hard to express in a quantitative form. Hence software architecture relies on the individual experience and skill of the designers rather than on quantitative laws. In this article I apply the methods developed for the classification of information on the World-Wide-Web to study the organization of Open Source programs in an attempt to establish the statistical laws governing software architecture.

Chepelianskii, A D

2010-01-01

315

Security Model For Service-Oriented Architecture  

CERN Multimedia

In this article, we examine how security applies to Service Oriented Architecture (SOA). Before we discuss security for SOA, lets take a step back and examine what SOA is. SOA is an architectural approach which involves applications being exposed as "services". Originally, services in SOA were associated with a stack of technologies which included SOAP, WSDL, and UDDI. This article addresses the defects of traditional enterprise application integration by combining service oriented-architecture and web service technology. Application integration is then simplified to development and integration of services to tackle connectivity of isomerous enterprise application integration, security, loose coupling between systems and process refactoring and optimization.

Karimi, Oldooz

2011-01-01

316

Customizable scientific web portal for fusion research  

International Nuclear Information System (INIS)

[en] Web browsers have become a major application interface for participating in scientific experiments such as those in magnetic fusion. The recent advances in web technologies motivated the deployment of interactive web applications with rich features. In the scientific world, web applications have been deployed in portal environments. When used in a scientific research environment, such as fusion experiments, web portals can present diverse sources of information in a unified interface. However, the design and development of a scientific web portal has its own challenges. One such challenge is that a web portal needs to be fast and interactive despite the high volume of information and number of tools it presents. Another challenge is that the visual output of the web portal must not be overwhelming to the end users, despite the high volume of data generated by fusion experiments. Therefore, the applications and information should be customizable depending on the needs of end users. In order to meet these challenges, the design and implementation of a web portal needs to support high interactivity and user customization. A web portal has been designed to support the experimental activities of DIII-D researchers worldwide by providing multiple services, such as real-time experiment status monitoring, diagnostic data access and interactive data visualization. The web portal also supports interactive collaborations by providing a collaborative logbook, shared visualization and online instant messaging services. The portal's design utilizes the multi-tier software architecture and has been implemented utilizing web 2.0 technologies, such as AJAX, Django, and Memcached, to develop a highly interactive and customizable user interface. It offers a customizable interface with personalized page layouts and list of services, which allows users to create a unique, personalized working environment to fit their own needs and interests. This paper describes the software architecture of this scientific web portal and its implementation to include deployment experiences during the 2009 DIII-D Experimental Campaign.

2010-01-01

317

Customizable scientific web portal for fusion research  

Energy Technology Data Exchange (ETDEWEB)

Web browsers have become a major application interface for participating in scientific experiments such as those in magnetic fusion. The recent advances in web technologies motivated the deployment of interactive web applications with rich features. In the scientific world, web applications have been deployed in portal environments. When used in a scientific research environment, such as fusion experiments, web portals can present diverse sources of information in a unified interface. However, the design and development of a scientific web portal has its own challenges. One such challenge is that a web portal needs to be fast and interactive despite the high volume of information and number of tools it presents. Another challenge is that the visual output of the web portal must not be overwhelming to the end users, despite the high volume of data generated by fusion experiments. Therefore, the applications and information should be customizable depending on the needs of end users. In order to meet these challenges, the design and implementation of a web portal needs to support high interactivity and user customization. A web portal has been designed to support the experimental activities of DIII-D researchers worldwide by providing multiple services, such as real-time experiment status monitoring, diagnostic data access and interactive data visualization. The web portal also supports interactive collaborations by providing a collaborative logbook, shared visualization and online instant messaging services. The portal's design utilizes the multi-tier software architecture and has been implemented utilizing web 2.0 technologies, such as AJAX, Django, and Memcached, to develop a highly interactive and customizable user interface. It offers a customizable interface with personalized page layouts and list of services, which allows users to create a unique, personalized working environment to fit their own needs and interests. This paper describes the software architecture of this scientific web portal and its implementation to include deployment experiences during the 2009 DIII-D Experimental Campaign.

Abla, G., E-mail: abla@fusion.gat.co [General Atomics, P.O. Box 85608, San Diego, CA (United States); Kim, E.N.; Schissel, D.P.; Flanagan, S.M. [General Atomics, P.O. Box 85608, San Diego, CA (United States)

2010-07-15

318

An annunciator architecture for the year 2000  

Energy Technology Data Exchange (ETDEWEB)

Exciting new safeguards and security technologies are on the horizon, and some are even on the shelves today. Self-testing sensors, smart sensors, and intelligent alarm analyzers are all designed to provide useful information to the operator. However, today`s current annunciator systems were not designed to accommodate these new technologies. New display technologies are also changing the look and feel of the annunciator of the future. Annunciator technology needs to ``catch up` to these other security technologies. This paper presents the concept for a new, object-oriented approach to annunciator architecture design. The new architecture could accommodate simple, switch-closure devices as well as information- rich sensors and intelligent analyzers. In addition the architecture could allow other leading-edge interfaces to be easily integrated into the annunciator system. These technologies will reduce operator workload and aid the operator in making informed security decisions. 3 refs., 2 figs.

Adams, D.G.; Fitzgerald, D.S.; Ortiz, S.

1996-09-01

319

Advanced data extraction infrastructure: Web based system for management of time series data  

International Nuclear Information System (INIS)

During operation of high energy physics experiments a big amount of slow control data is recorded. It is necessary to examine all collected data checking the integrity and validity of measurements. With growing maturity of AJAX technologies it becomes possible to construct sophisticated interfaces using web technologies only. Our solution for handling time series, generally slow control data, has a modular architecture: backend system for data analysis and preparation, a web service interface for data access and a fast AJAX web display. In order to provide fast interactive access the time series are aggregated over time slices of few predefined lengths. The aggregated values are stored in the temporary caching database and, then, are used to create generalizing data plots. These plots may include indication of data quality and are generated within few hundreds of milliseconds even if very high data rates are involved. The extensible export subsystem provides data in multiple formats including CSV, Excel, ROOT, and TDMS. The search engine can be used to find periods of time where indications of selected sensors are falling into the specified ranges. Utilization of the caching database allows performing most of such lookups within a second. Based on this functionality a web interface facilitating fast (Google-maps style) navigation through the data has been implemented. The solution is at the moment used by several slow control systems at Test Facility for Fusion Magnets (TOSKA) and Karlsruhe Tritium Neutrino (KATRIN).

2010-04-01

320

Decision Support Systems Architectures  

CERN Multimedia

This paper presents the main components of the decision assisting systems. Further on three types of architectures of these systems are described, analyzed, and respectively compared, namely: the network architecture, the centralized architecture and the hierarchical architecture.

Stanciu, Cristina Ofelia

2009-01-01

 
 
 
 
321

Business aspects of web services  

CERN Multimedia

Driven by maturing Web service technologies and the wide acceptance of the service-oriented architecture paradigm, the software industry's traditional business models and strategies have begun to change: software vendors are turning into service providers. In addition, in the Web service market, a multitude of small and highly specialized providers offer modular services of almost any kind and economic value is created through the interplay of various distributed service providers that jointly contribute to form individualized and integrated solutions. This trend can be optimally catalyzed by

Weinhardt, Christof; Conte, Tobias

2011-01-01

322

SERVICIOS WEB EN TELEFONÍA CELULAR  

Directory of Open Access Journals (Sweden)

Full Text Available La evolución de la telefonía móvil ha permitido el desarrollo de estándares con el fin de facilitar la adquisición y conocimiento de servicios Web a los usuarios de móviles. La llegada de nuevas tecnologías como SOA (Service Orient to Architecture) abre un amplio campo de posibilidades para el desarrollo de diversas aplicaciones cuyo propósito es facilitar el acceso a contenido informativo e interactivo. Este artículo presenta el estado actual de la implementación de tecnologías emergentes como los Servicios Web en Telefonía Celular, teniendo como base la plataforma J2ME (Java 2 Micro Edition) para el desarrollo de un prototipo.

LUZ MARINA SANTOS J.; DEWAR WILLMER RICO B.; ANDRÉS ARLEY RINCÓN P.

2009-01-01

323

A Novel Architecture for E-Learning Knowledge Assessment Systems  

Science.gov (United States)

In this article we propose a novel e-learning system, dedicated strictly to knowledge assessment tasks. In its functioning it utilizes web-based technologies, but its design differs radically from currently popular e-learning solutions which rely mostly on thin-client architecture. Our research proved that such architecture, while well suited for…

Gierlowski, Krzysztof; Nowicki, Krzysztof

2009-01-01

324

Evaluating software architecture using fuzzy formal models  

Directory of Open Access Journals (Sweden)

Full Text Available Unified Modeling Language (UML) has been recognized as one of the most popular techniques to describe static and dynamic aspects of software systems. One of the primary issues in designing software packages is the existence of uncertainty associated with such models. Fuzzy-UML to describe software architecture has both static and dynamic perspective, simultaneously. The evaluation of software architecture design phase initiates always help us find some additional requirements, which helps reduce cost of design. In this paper, we use a fuzzy data model to describe the static aspects of software architecture and the fuzzy sequence diagram to illustrate the dynamic aspects of software architecture. We also transform these diagrams into Petri Nets and evaluate reliability of the architecture. The web-based hotel reservation system for further explanation has been studied.

Payman Behbahaninejad; Ali Harounabadi; Sayed Javad Mirabedini

2012-01-01

325

Web Ecology ?????  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web Ecology is an electronic peer-reviewed journal issued by the European Ecological Federation in cooperation with the Oikos Editorial Office, Lund, Sweden. Ecologists from all countries are invited to publish original results on its pages. Web Ecology will publish studies and re...

326

Underwater sensor nodes and networks.  

Science.gov (United States)

Sensor technology has matured enough to be used in any type of environment. The appearance of new physical sensors has increased the range of environmental parameters for gathering data. Because of the huge amount of unexploited resources in the ocean environment, there is a need of new research in the field of sensors and sensor networks. This special issue is focused on collecting recent advances on underwater sensors and underwater sensor networks in order to measure, monitor, surveillance of and control of underwater environments. On the one hand, from the sensor node perspective, we will see works related with the deployment of physical sensors, development of sensor nodes and transceivers for sensor nodes, sensor measurement analysis and several issues such as layer 1 and 2 protocols for underwater communication and sensor localization and positioning systems. On the other hand, from the sensor network perspective, we will see several architectures and protocols for underwater environments and analysis concerning sensor network measurements. Both sides will provide us a complete view of last scientific advances in this research field. PMID:24013489

Lloret, Jaime

2013-09-05

327

Underwater Sensor Nodes and Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Sensor technology has matured enough to be used in any type of environment. The appearance of new physical sensors has increased the range of environmental parameters for gathering data. Because of the huge amount of unexploited resources in the ocean environment, there is a need of new research in the field of sensors and sensor networks. This special issue is focused on collecting recent advances on underwater sensors and underwater sensor networks in order to measure, monitor, surveillance of and control of underwater environments. On the one hand, from the sensor node perspective, we will see works related with the deployment of physical sensors, development of sensor nodes and transceivers for sensor nodes, sensor measurement analysis and several issues such as layer 1 and 2 protocols for underwater communication and sensor localization and positioning systems. On the other hand, from the sensor network perspective, we will see several architectures and protocols for underwater environments and analysis concerning sensor network measurements. Both sides will provide us a complete view of last scientific advances in this research field.

Jaime Lloret

2013-01-01

328

Underwater sensor nodes and networks.  

UK PubMed Central (United Kingdom)

Sensor technology has matured enough to be used in any type of environment. The appearance of new physical sensors has increased the range of environmental parameters for gathering data. Because of the huge amount of unexploited resources in the ocean environment, there is a need of new research in the field of sensors and sensor networks. This special issue is focused on collecting recent advances on underwater sensors and underwater sensor networks in order to measure, monitor, surveillance of and control of underwater environments. On the one hand, from the sensor node perspective, we will see works related with the deployment of physical sensors, development of sensor nodes and transceivers for sensor nodes, sensor measurement analysis and several issues such as layer 1 and 2 protocols for underwater communication and sensor localization and positioning systems. On the other hand, from the sensor network perspective, we will see several architectures and protocols for underwater environments and analysis concerning sensor network measurements. Both sides will provide us a complete view of last scientific advances in this research field.

Lloret J

2013-01-01

329

Sistema Web de Identificación de Ganado Bovino y Monitoreo en Tiempo Real de su Temperatura y Frecuencia Cardiaca usando redes de sensores inalámbricos  

Directory of Open Access Journals (Sweden)

Full Text Available Este artículo presenta el diseño, desarrollo y pruebas de un sistema para identificación y monitoreo de variables fisiológicas de ganado vacuno, cuyo propósito es alertar a los productores de probables eventos de estrés calórico en estos. El sistema desarrollado es una red de sensores inalámbricos basada en la especificación 802.15.4, y permite la consulta en línea de los datos básicos del animal tales como edad, raza, peso, vacunas, y de los datos en tiempo real de temperatura y frecuencia respiratoria. Así mismo, cuando alguna de estas variables se encuentra por fuera del rango configurado por el usuario como normal, se envía una alerta por medio de correo electrónico.

Jhon Jair Quiza Montealegre; Henrry Castelblanco Triana; Diego González Vásquez

2012-01-01

330

Managing source schema evolution in web warehouses  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english Web Data Warehouses have been introduced to enable the analysis of integrated Web data. One of the main challenges in these systems is to deal with the volatile and dynamic nature of Web sources. In this work we address the effects of adding/removing/changing Web sources and data items to the Data Warehouse (DW) schema. By managing source evolution we mean the automatic propagation of these changes to the DW. The proposed approach is based on a wrapper/mediator architectu (more) re, which reduces the impact of Web source changes on the DW schema. This paper presents this architecture and analyses some selected evolution cases in the context of Web DW.

Marotta, Adriana; Motz, Regina; Ruggia, Raul

2002-11-01

331

WEB SERVICES INTEGRATION WITH DISTRIBUTED APPLICATIONS  

Directory of Open Access Journals (Sweden)

Full Text Available A Web service is a distributed application component. Web services distributed computing model allows application-to-application communication. There is nothing fundamentally new about the basic concept and the related technologies. The innovative thing about this is the reach of Web services and its ubiquitous support by literally all major vendors. Most likely, heterogeneity will at the end no longer be an obstruction for distributed applications. This paper describes the concept of service-oriented architecture (SOA) in conjunction with the Web services technology and covers the core Web services specifications which form a powerful and robust foundation for building distributed systems. It is presented a case study regarding the integration of the Web services with the SAP system for handling interoperability issues.The conclusions and the future proposed developments are presented in the end of the paper.

Marilena DUMITRACHE; Stelian DUMITRA; Mircea BACIU

2010-01-01

332

A Flexible Architecture for Intelligent Cruise Control  

UK PubMed Central (United Kingdom)

In this paper we present a concept of a flexible and modular architecture for intelligent cruise control (ICC). The architecture can be subdivided into three different processing steps: the object-related analysis of sensor data, the behavior-based scene interpretation and the behavior planning. Each of it works on collected sensor information as well as on a knowledge base, which can be broadened by external knowledge like GPS and street maps. An implementation of the object-related analysis has been presented on the IV'98 in Stuttgart [1]. An intelligent car following system is described in this paper as a spin-off for behavior planning.

U. Handmann; I. Leefken; C. Tzomakas; W. Seelen; Lehrstuhl Fur Theoretische Biologie; Ruhr-universitat Bochum

333

Fabric Architecture  

Science.gov (United States)

Published by the Industrial Fabrics Association International, Fabric Architecture magazine is published bimonthly and is distributed to over 13000 architects working in the field. For those who've never thought about the possibilities and opportunities afforded by this area that straddles the lines between fabrics, design, and architecture, it's quite a find. On this page, users can look through materials that address topics like tents, lightweight structures, graphics, awnings, and truck covers. After perusing these areas, visitors should delve into the current issue. The archives here date back to 2006, and the topics covered within these pages include fabrics in the workplace, flexible design materials, and creating a "green" car park with various fabrics. For those who are interested, there's also information about how to subscribe to the print edition of the magazine.

334

Semantic web services for web databases  

CERN Multimedia

Semantic Web Services for Web Databases introduces an end-to-end framework for querying Web databases using novel Web service querying techniques. This includes a detailed framework for the query infrastructure for Web databases and services. Case studies are covered in the last section of this book. Semantic Web Services For Web Databases is designed for practitioners and researchers focused on service-oriented computing and Web databases.

Ouzzani, Mourad

2011-01-01

335

A Multi-Agent Platform for a Corporate Semantic Web  

UK PubMed Central (United Kingdom)

We describe the technical choices and the design of a multi-agentssoftware architecture to manage a corporate memory in the formof a corporate semantic web. We then present our approach totackle a distributed memory and distributed queries.

Fabien Gandon; Laurent Berthelot; Rose Dieng-kuntz

336

WEB SERVICES FOR MOBILE COMPUTING  

Directory of Open Access Journals (Sweden)

Full Text Available In todays day to day life,mobile users are becoming popular clients to consume any type of web resources such as web service. However, there are problems in connecting mobile devices to existing WS. This paper focuses on three of the following challenge : time and speed,bandwidth/latency,limited resources. This paper implements and developes a cross-platform architecture for connecting mobile devices to the WS. The architecture includes a platform independent design of mobile client and a middleware for enhancing the communication between mobile clients and WS. Finally, the middleware can be deployed on Cloud Platforms, like Google App Engine and Amazon EC2, to enhance the scalability and reliability. The experiments evaluate the optimization/adaptation, overhead of the middleware.

Piyush M.Patil , Kushal Gohil, Rohit Madhavi

2012-01-01

337

UAV Cooperation Architectures for Persistent Sensing  

Energy Technology Data Exchange (ETDEWEB)

With the number of small, inexpensive Unmanned Air Vehicles (UAVs) increasing, it is feasible to build multi-UAV sensing networks. In particular, by using UAVs in conjunction with unattended ground sensors, a degree of persistent sensing can be achieved. With proper UAV cooperation algorithms, sensing is maintained even though exceptional events, e.g., the loss of a UAV, have occurred. In this paper a cooperation technique that allows multiple UAVs to perform coordinated, persistent sensing with unattended ground sensors over a wide area is described. The technique automatically adapts the UAV paths so that on the average, the amount of time that any sensor has to wait for a UAV revisit is minimized. We also describe the Simulation, Tactical Operations and Mission Planning (STOMP) software architecture. This architecture is designed to help simulate and operate distributed sensor networks where multiple UAVs are used to collect data.

Roberts, R S; Kent, C A; Jones, E D

2003-03-20

338

Consuming Web Services on Mobile Platforms  

Directory of Open Access Journals (Sweden)

Full Text Available Web services are an emerging technology that provides interoperability between applications running in different platforms. The Web services technology provide the best approach to Service Oriented Architecture envision of component collaboration for better business re-quirements fulfilment in large enterprise systems. The challenges in implementing Web services consuming clients for low-resources mobile devices connected through unreliable wireless connections are delimited. The paper also presents a communication architecture that moves the heavy load of XML-based messaging system from the mobile clients to an external middleware component. The middleware component will act like a gateway that lightly com-municates with the device in a client-server manner over a fast binary protocol and at the same time takes the responsibility of solving the request to the Web service.

Alin COBARZAN

2010-01-01

339

Web interface for the Heart Disease Program.  

UK PubMed Central (United Kingdom)

The task of making a large complex diagnostic program available to a broad audience of physicians has become more feasible with the ubiquitous accessibility of the client-server architecture of the World Wide Web. This paper describes the design and implementation of a Web interface for the Heart Disease Program (HDP). The client-server architecture imposes a number of requirements on the program. The graphical capabilities of the Web enable a number of enhancements to the program but also cause some limitations. Our initial experience with physicians using the HDP through the Web interface has been positive and we are now conducting an evaluation of the HDP using this form of access.

Long WJ; Fraser H; Naimi S

1996-01-01

340

Customizable Scientific Web Portal for Fusion Research  

International Nuclear Information System (INIS)

The Web browser has become one of the major application interfaces for remotely participating in magnetic fusion experiments. Recently in other areas, web portals have begun to be deployed. These portals are used to present very diverse sources of information in a unified way. While a web portal has several benefits over other software interfaces, such as providing single point of access for multiple computational services, and eliminating the need for client software installation, the design and development of a web portal has unique challenges. One of the challenges is that a web portal needs to be fast and interactive despite a high volume of tools and information that it presents. Another challenge is the visual output on the web portal often is overwhelming due to the high volume of data generated by complex scientific instruments and experiments; therefore the applications and information should be customizable depending on the needs of users. An appropriate software architecture and web technologies can meet these problems. A web-portal has been designed to support the experimental activities of DIII-D researchers worldwide. It utilizes a multi-tier software architecture, and web 2.0 technologies, such as AJAX, Django, and Memcached, to develop a highly interactive and customizable user interface. It offers a customizable interface with personalized page layouts and list of services for users to select. The users can create a unique personalized working environment to fit their own needs and interests. Customizable services are: real-time experiment status monitoring, diagnostic data access, interactive data visualization. The web-portal also supports interactive collaborations by providing collaborative logbook, shared visualization and online instant message services. Furthermore, the web portal will provide a mechanism to allow users to create their own applications on the web portal as well as bridging capabilities to external applications such as Twitter and other social networks. This document is composed of an abstract followed by the presentation transparencies. (authors)

2009-01-01

 
 
 
 
341

Customizable Scientific Web Portal for Fusion Research  

Energy Technology Data Exchange (ETDEWEB)

The Web browser has become one of the major application interfaces for remotely participating in magnetic fusion experiments. Recently in other areas, web portals have begun to be deployed. These portals are used to present very diverse sources of information in a unified way. While a web portal has several benefits over other software interfaces, such as providing single point of access for multiple computational services, and eliminating the need for client software installation, the design and development of a web portal has unique challenges. One of the challenges is that a web portal needs to be fast and interactive despite a high volume of tools and information that it presents. Another challenge is the visual output on the web portal often is overwhelming due to the high volume of data generated by complex scientific instruments and experiments; therefore the applications and information should be customizable depending on the needs of users. An appropriate software architecture and web technologies can meet these problems. A web-portal has been designed to support the experimental activities of DIII-D researchers worldwide. It utilizes a multi-tier software architecture, and web 2.0 technologies, such as AJAX, Django, and Memcached, to develop a highly interactive and customizable user interface. It offers a customizable interface with personalized page layouts and list of services for users to select. The users can create a unique personalized working environment to fit their own needs and interests. Customizable services are: real-time experiment status monitoring, diagnostic data access, interactive data visualization. The web-portal also supports interactive collaborations by providing collaborative logbook, shared visualization and online instant message services. Furthermore, the web portal will provide a mechanism to allow users to create their own applications on the web portal as well as bridging capabilities to external applications such as Twitter and other social networks. This document is composed of an abstract followed by the presentation transparencies. (authors)

Abla, G.; Kim, E.; Schissel, D.; Flannagan, S. [General Atomics, San Diego (United States)

2009-07-01

342

Web Personalization Using Web Mining  

Directory of Open Access Journals (Sweden)

Full Text Available The information on the web is growing dramatically. The users has to spend lots of time on the web finding the information they are interested in. Today, he traditional search engines do not give users enough personalized help but provide the user with lots of irrelevant information. In this paper, we present a personalize Web searchsystem, which can helps users to get the relevant web pages based on their selection from the domain list. Thus, users can obtain a set of interested domains and the web pages from the system. The system is based on features extracted from hyperlinks, such as anchor terms or URL tokens. Our methodology uses an innovative weighted URL Rank algorithm based on user interested domains and user query.

Ms.Kavita D.Satokar,; Mr.S.Z.Gawali

2010-01-01

343

Introduction: Life in the Web  

Directory of Open Access Journals (Sweden)

Full Text Available The article serves as an introduction to the current journal issue on Online Lives. It discusses and connects the research papers here under three different rubrics: the hopes and fears raised by a world where information is inescapable, the potential and risk of online identities and, finally, the forms of knowledge and participation that define the current architecture of a Web dominated by user-generated content.

Oana Mateescu

2010-01-01

344

SEMANTIC BASED MULTIPLE WEB SEARCH ENGINE  

Directory of Open Access Journals (Sweden)

Full Text Available With the tremendous growth of information available to end users through the Web, search engines come to play ever a more critical role. Nevertheless, because of their general-purpose approach, it is always less uncommon that obtained result sets provide a burden ofuseless pages. The next-generation Web architecture, represented by the Semantic Web, provides the layered architecture possibly allowing overcoming this limitation. Several search engines have been proposed, which allow increasing information retrieval accuracy by exploiting a key content of Semantic Web resources, that is, relations. To make the Semantic Web work, well-structured data andrules are necessary for agents to roam the Web [2]. XML and RDF are two important technologies: we can create our own structures by XML without indicating what they mean; RDF uses sets of triples which express basic concepts [2]. DAML is the extension of XML and RDF The aim of this project is to develop a search engine based on ontologymatching within the Semantic Web. It uses the data in Semantic Web form such as DAML or RDF. When the user input a query, the program accepts the query and transfers it to a machine learning agent. Then the agent measures the similarity between different ontology’s, and feedback the matched item to the user.

MS.S.LATHA SHANMUGAVADIVU,; DR.M.RAJARAM

2010-01-01

345

Enhancing E-Learning through Web Service and Intelligent Agents  

Directory of Open Access Journals (Sweden)

Full Text Available E-learning is basically the integration of various technologies. E-Learning technology is now maturing and we can find a multiplicity of standards. New technologies such as agents and web services are promising better results. In this paper we have proposed an e-learning architecture that is dependent on intelligent agent systems and web services. These communication technologies will make the architecture more robust, scalable and efficient.

Nasir Hussain; M. Khalid Khan

2006-01-01

346

WEB INTELLIGENCE  

Directory of Open Access Journals (Sweden)

Full Text Available This paper describes analysis of semi-structured document.As,for a semi-structured document or more specifically resume document, the project on Web Intelligence based on unsupervised learning includes pattern matching, information identification and feedback mechanisms.Based on the research,web intelligence is implemented for a firm.Taking input from the web,it can read,analyse,retrieve and store information.The accuracy and efficiency of the system is satisfactory for the requirements specified.In future,the engine can be a reference for any generic analysis requirements.

Nandini Jog 1 , Shamala Mantri2 ,Isha Vihan3 ,Saurabh Jain4

2011-01-01

347

A New System Architecture for Pervasive Computing  

CERN Multimedia

We present new system architecture, a distributed framework designed to support pervasive computing applications. We propose a new architecture consisting of a search engine and peripheral clients that addresses issues in scalability, data sharing, data transformation and inherent platform heterogeneity. Key features of our application are a type-aware data transport that is capable of extract data, and present data through handheld devices (PDA (personal digital assistant), mobiles, etc). Pervasive computing uses web technology, portable devices, wireless communications and nomadic or ubiquitous computing systems. The web and the simple standard HTTP protocol that it is based on, facilitate this kind of ubiquitous access. This can be implemented on a variety of devices - PDAs, laptops, information appliances such as digital cameras and printers. Mobile users get transparent access to resources outside their current environment. We discuss our system's architecture and its implementation. Through experimental...

Ismail, Anis; Ismail, Ziad

2011-01-01

348

A Surbey on Cloud Computing Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available Cloud computing is Internet-based computing, whereby shared resources, software and information are provided to computers and other devices on demand. Users don‘t need expertise in or control over the technology infrastructure "in the cloud". Typical cloud computing providers deliver common business applications online that are accessed from another Web service or software like a Web browser, while the software and data are stored on servers. The two most significant components of cloud computing architecture are front end and back end. The front end is the part seen by the client, i.e. the computer user. This includes the client‘s or computer and the applications used to access the cloud via a user interface such as a web browser. The backend of the cloud computing architecture is the ?cloud‘ itself, comprising various computers, servers and data storage devices. A key element of cloud computing is customization and creation of a user-defined experience.

Rajpal Choudhary

2012-01-01

349

Networked Sensor Arrays  

International Nuclear Information System (INIS)

[en] A set of independent radiation sensors, coupled with real-time data telemetry, offers the opportunity to run correlation algorithms for the sensor array as well as to incorporate non-radiological data into the system. This may enhance the overall sensitivity of the sensors and provide an opportunity to project the location of a source within the array. In collaboration with Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories (SNL), we have conducted field experiments to test a prototype system. Combining the outputs of a set of distributed sensors permits the correlation that the independent sensor outputs. Combined with additional information such as traffic patterns and velocities, this can reduce random/false detections and enhance detection capability. The principle components of such a system include: (1) A set of radiation sensors. These may be of varying type and complexity, including gamma and/or neutron detectors, gross count and spectral-capable sensors, and low to high energy-resolution sensors. (2) A set of non-radiation sensors. These may include sensors such as vehicle presence and imaging sensors. (3) A communications architecture for near real-time telemetry. Depending upon existing infrastructure and bandwidth requirements, this may be a radio or hard-wire based system. (4) A central command console to pole the sensors, correlate their output, and display the data in a meaningful form to the system operator. Both sensitivity and selectivity are important considerations when evaluating the performance of a detection system. Depending on the application, the optimization of sensitivity as well as the rejection of ''nuisance'' radioactive sources may or may not be critical

2002-01-01

350

Networked Sensor Arrays  

Energy Technology Data Exchange (ETDEWEB)

A set of independent radiation sensors, coupled with real-time data telemetry, offers the opportunity to run correlation algorithms for the sensor array as well as to incorporate non-radiological data into the system. This may enhance the overall sensitivity of the sensors and provide an opportunity to project the location of a source within the array. In collaboration with Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories (SNL), we have conducted field experiments to test a prototype system. Combining the outputs of a set of distributed sensors permits the correlation that the independent sensor outputs. Combined with additional information such as traffic patterns and velocities, this can reduce random/false detections and enhance detection capability. The principle components of such a system include: (1) A set of radiation sensors. These may be of varying type and complexity, including gamma and/or neutron detectors, gross count and spectral-capable sensors, and low to high energy-resolution sensors. (2) A set of non-radiation sensors. These may include sensors such as vehicle presence and imaging sensors. (3) A communications architecture for near real-time telemetry. Depending upon existing infrastructure and bandwidth requirements, this may be a radio or hard-wire based system. (4) A central command console to pole the sensors, correlate their output, and display the data in a meaningful form to the system operator. Both sensitivity and selectivity are important considerations when evaluating the performance of a detection system. Depending on the application, the optimization of sensitivity as well as the rejection of ''nuisance'' radioactive sources may or may not be critical.

R. J. Tighe

2002-10-01

351

Testing Web Services Composition: A Mapping Study  

Directory of Open Access Journals (Sweden)

Full Text Available E-business systems are known for their frequent changes in business requirements, and traditional software development engineering approaches have difficulties in keeping up with this dynamicity. The use of service oriented architecture in software development has become popular as it provides a solution to frequent changes to business environments in a heterogeneous network. In service oriented architecture, new systems are quickly developed by combining services developed and owned by different organizations, and one way of realising this architecture is via Web services. Although much research effort has been put into the discovery, invocation and composition of services testing Web services has only begun to attract interest from both researchers and industry players. This paper aims to provide a mapping study of current Web services composition testing researches conducted by other researchers. Research papers on testing of Web services composition were gathered from various scholarly databases using provided search engines within a given period of time. The research papers were then classified according to issues addressed by them. The aim is to get a broad overview of the current state of research in Web services composition testing. By looking at the areas focused by existing researchers, gaps and untouched areas of Web services composition testing can be discovered.

Hazlifah Mohd Rusli; Suhaimi Ibrahim; Mazidah Puteh

2011-01-01

352

Semantic Sensors for Rapid Application Development for Environmental Management  

Science.gov (United States)

Critical environmental management decisions depend on information provided by a variety of sources (e.g., legacy databases with historical data, real-time data coming from various kinds of sensor networks, mathematical models and simulations, etc.). As the cost of deploying intelligent sensor networks falls, we expect to see more sensor networks being deployed, and an even greater dependence on information coming from sensor networks for better situation assessment and decision making. As a result, decision support systems for environmental management will face the following challenges: - They will need to perform computations (for data fusion and integration, mining and other purposes) on large amounts of real-time data stemming from heterogeneous, autonomously developed and deployed sensor networks possibly combined with other existing data sources. - They will need to respond to sensed data in real-time, possibly adapting the behaviour of the sensor network, to respond to emergency situations. - They will have to deal with very dynamic sensor network sources and changing application requirements that might call for using data in new and possibly unexpected ways, outside the immediate scope of the project where they were deployed. Therefore, it will be common for third parties to integrate and enrich data from historical databases, live sensor networks that were deployed independently by different providers and other sources in order to support their decisions (e.g., flood warning, fire warning, etc.). In most cases, there is a clear need for third parties to be able to use data unexpectedly in a manner that was not previously envisioned (e.g., satellite products, data from tidal gauges, etc.), and make relevant data and information easily publishable using Web and mobile communications. We will present the advances that we have made in this direction in the context of the SemsorGrid4Env project, where we have proposed an architecture and technologies covering components that deal with the ontological and spatio-temporal based registration and discovery of data sources (including sensor networks), the semantic integration of heterogeneous data sources (including historical databases, live data streams and sensor networks with in-network query processing capabilities), service-oriented and resource-oriented (REST and Linked Data) access to these data sources, and provision of flexible user interfaces that hide most of the complexity out from end users. In summary, we seek to provide solutions that are simple, live, and dynamic.

Corcho, Oscar

2010-05-01

353

Mobile Computing, Web Services and the Semantic  

UK PubMed Central (United Kingdom)

This paper focuses on the intersection of mobile computing, theSemantic Web and Web services, and examines how these technologies serveas a foundation for an architectural framework that provides new opportunitiesfor mobile commerce and services within organizations. Mobile technologiesintroduce several advantages that cannot be attained through conventionalwired connectivity. These include localization and personalization, whichallows the delivery of customized information to users based on locale, identityor a user role. Two technology initiatives that hold promise in helping realizethe potential of mobile computing are the Semantic Web and Web services. TheSemantic Web is an initiative supported by the W3C intended to supportsemantic meaning and context for Web resources. Key technologies includeRDF and DAML for data categorization and inference. Web services representsan approach for applications to communicate with each other automaticallyover the Web using standard Internet protocols. Collectively, these technologiesopen up new possibilities for leveraging the capabilities of mobile computingwhere the Semantic Web supports contextual meaning and Web servicestechnologies allow registration and discovery of services based on mobilecontext.

Frank P. Coyle

354

Improving Semantic Web Service Discovery  

Directory of Open Access Journals (Sweden)

Full Text Available Semantic Web Services (SWS) propose to extend the traditional Web Services technologies on the way to consolidate ontologies and semantics. This makes it possible to select, integrate and invocate services dynamically. In this way, services are able to dynamically adapt themselves to changes without human intervention. The main purpose of this paper is to present an algorithm for matching SWS. The algorithm uses the description of the service capabilities to match the semantic values. The traditional matching has been improved using ontologies which constitute a step further in the matching algorithms. To implement the algorithm, an agent FIPA compliant architecture has been designed and developed. The results obtained are positive. The semantic web services framework developed in combination with the use of the matchmaking algorithm, which allows finding services based on their similarities.

J. Javier Samper; F. Javier Adell; Leo van den Berg; J. José Martinez

2008-01-01

355

Protein comparison at the domain architecture level  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background The general method used to determine the function of newly discovered proteins is to transfer annotations from well-characterized homologous proteins. The process of selecting homologous proteins can largely be classified into sequence-based and domain-based approaches. Domain-based methods have several advantages for identifying distant homology and homology among proteins with multiple domains, as compared to sequence-based methods. However, these methods are challenged by large families defined by 'promiscuous' (or 'mobile') domains. Results Here we present a measure, called Weighed Domain Architecture Comparison (WDAC), of domain architecture similarity, which can be used to identify homolog of multidomain proteins. To distinguish these promiscuous domains from conventional protein domains, we assigned a weight score to Pfam domain extracted from RefSeq proteins, based on its abundance and versatility. To measure the similarity of two domain architectures, cosine similarity (a similarity measure used in information retrieval) is used. We combined sequence similarity with domain architecture comparisons to identify proteins belonging to the same domain architecture. Using human and nematode proteomes, we compared WDAC with an unweighted domain architecture method (DAC) to evaluate the effectiveness of domain weight scores. We found that WDAC is better at identifying homology among multidomain proteins. Conclusion Our analysis indicates that considering domain weight scores in domain architecture comparisons improves protein homology identification. We developed a web-based server to allow users to compare their proteins with protein domain architectures.

Lee Byungwook; Lee Doheon

2009-01-01

356

Focused Crawling of the Deep Web Using Service Class Descriptions  

Energy Technology Data Exchange (ETDEWEB)

Dynamic Web data sources--sometimes known collectively as the Deep Web--increase the utility of the Web by providing intuitive access to data repositories anywhere that Web access is available. Deep Web services provide access to real-time information, like entertainment event listings, or present a Web interface to large databases or other data repositories. Recent studies suggest that the size and growth rate of the dynamic Web greatly exceed that of the static Web, yet dynamic content is often ignored by existing search engine indexers owing to the technical challenges that arise when attempting to search the Deep Web. To address these challenges, we present DynaBot, a service-centric crawler for discovering and clustering Deep Web sources offering dynamic content. DynaBot has three unique characteristics. First, DynaBot utilizes a service class model of the Web implemented through the construction of service class descriptions (SCDs). Second, DynaBot employs a modular, self-tuning system architecture for focused crawling of the DeepWeb using service class descriptions. Third, DynaBot incorporates methods and algorithms for efficient probing of the Deep Web and for discovering and clustering Deep Web sources and services through SCD-based service matching analysis. Our experimental results demonstrate the effectiveness of the service class discovery, probing, and matching algorithms and suggest techniques for efficiently managing service discovery in the face of the immense scale of the Deep Web.

Rocco, D; Liu, L; Critchlow, T

2004-06-21

357

JWIG: Yet Another Framework for Maintainable and Secure Web Applications  

DEFF Research Database (Denmark)

Although numerous frameworks for web application programming have been developed in recent years, writing web applications remains a challenging task. Guided by a collection of classical design principles, we propose yet another framework. It is based on a simple but flexible server-oriented architecture that coherently supports general aspects of modern web applications, including dynamic XML construction, session management, data persistence, caching, and authentication, but it also simplifies programming of server-push communication and integration of XHTML-based applications and XML-based web services.The resulting framework provides a novel foundation for developing maintainable and secure web applications.

MØller, Anders; Schwarz, Mathias Romme

2009-01-01

358

ARPENTEUR:A WEB-BASED PHOTOGRAMMETRY TOOL FORARCHITECTURAL MODELING  

Digital Repository Infrastructure Vision for European Research (DRIVER)

ARPENTEUR (as Architectural PhotogrammEtry Network Tool for EdUcation and Research) is a web application fordigital photogrammetry mainly dedicated to architecture. ARPENTEUR has been developed since 1998 by two French research teams: the "Photogrammetry and Geomatics" group of ENSAIS-LERGEC's...

Drap, Pierre; Grussenmeyer, Pierre

359

Retrieving Information from the Invisible Web Using Mobile Agents  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This study proposes a model of information retrieval on the invisible Web by using the mobile agent paradigm. The developed architecture uses the power of a search engine to provide a list of sites of the invisible Web which are likely to be relevant and launches a dynamic search on these&...

Fabien-Kenzo Sato; Samuel Pierre; Roch H. Glitho

360

ARPENTEUR 3.0: Recent developments in web based photogrammetry  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Experiences and recent developments of a WEB application dedicated to digital photogrammetry are presented. The aim of the ARPENTEUR project (as Architectural PhotogrammEtry Network Tool for EdUcation and Research) is to propose a photogrammetric concept and software embedded in Web tech...

Grussenmeyer, Pierre; Drap, Pierre; Gaillard, Gilles

 
 
 
 
361

Facilitating Designer-Customer Communication in the World Wide Web.  

Science.gov (United States)

Presents WebShaman, an application built to demonstrate how a distributed virtual prototyping system with a client/server architecture, could support geographically distant designer/customer communication. Provides an overview of smart virtual prototyping; discusses implementation of synchronous collaboration via the World Wide Web; and assesses…

Tuikka, Tuomo; Salmela, Marko

1998-01-01

362

A Middleware road towards Web (Grid) Services  

CERN Multimedia

Middleware technologies is a very big field, containing a strong already done research as well as the currently running research to confirm already done research's results and the to have some new solution by theoretical as well as the experimental (practical) way. This document has been produced by Zeeshan Ahmed (Student: Connectivity Software Technologies Blekinge Institute of Technologies). This describes the research already done in the field of middleware technologies including Web Services, Grid Computing, Grid Services and Open Grid Service Infrastructure & Architecture. This document concludes with the overview of Web (Grid) Service, Chain of Web (Grid) Services and the necessary security issue.

Ahmed, Zeeshan

2010-01-01

363

An Implementation of Semantic Web System for Information retrieval using J2EE Technologies.  

Directory of Open Access Journals (Sweden)

Full Text Available Accessing web resources (Information) is an essential facility provided by web applications to every body. Semantic web is one of the systems that provide a facility to access the resources through web service applications. Semantic web and web Services are new emerging web based technologies. An automatic information processing system can be developed by using semantic web and web services, each having its own contribution within the context of developing web-based information systems and applications. This combination, called Semantic Web Services (SWS), provides several potential opportunities and challenges in ebusiness. Web services provide a verity of dynamic services for accessing web resources, but until now, they have been managed separately from conventional web contents resources. A new system is proposed here for a semantic web information retrieval, which incorporates semantic web, web services and J2EE technologies to enable dynamically locate the web resources that include homogeneous or heterogeneous web contents and web services. In this multi-tier architecture system the middle tier components contains the semantic web services.

B.Hemanth kumar,; Prof. M.Surendra Prasad Babu

2011-01-01

364

Spring MVC Framework for Web 2.0  

Directory of Open Access Journals (Sweden)

Full Text Available When building rich user experience web applications, an abundance of web application frameworks is available and only little guidance for making the decision which one to choose. Web 2.0 applications allow individuals to manage their content online and to share it with other users and services on the Web. Such sharing requires access control to be put in place. Existing access control solutions, however, are unsatisfactory as they do not offer the functionality that users need in the open and user-driven Web environment. Out of all those web development framework the most popular is MVC Framework. Model–view–controller (MVC) is a software architecture, currently considered an architectural pattern used in software engineering. The pattern isolates

2012-01-01

365

Integration of RFID and web service for assisted living.  

UK PubMed Central (United Kingdom)

The number of people over 65 years old throughout most stable and prosperous countries in the world is increasing. Availability of their care in their own homes is imperative because of the economic reasons and their choices where to live (World Health Organization, Definition of an older or elderly person. http://www.who.int/healthinfo/survey/ageingdefnolder/en/ ; EQUIP-European Framework for Qualifications in Home Care Services for Older People, http://www.equip-project.com ; Salonen, 2009). "Recent advancement in wireless communications and electronics has enabled the development of low-cost sensor networks. The sensor networks can be utilized in various application areas." (Akyildiz, et al. 2002) These two statements show that there is a great promise in wireless technology and utilizing it in assisted living might be very beneficial to the elderly people. In this paper, we propose software architecture called Location Windows Service (LWS) which integrates the Radio Frequency Identification (RFID) technology and the web service to build an assisted living system for elderly people at home. This architecture monitors the location of elderly people without interfering in their daily activities. Location information messages that are generated as the elderly move from room to room indicate that the elderly person is fit and healthy and going about their normal life. The communication must be timely enough to follow elderly people as they move from room to room without missing a location. Unacknowledged publishing, subscription filtering and short location change messages are also included in this software model to reduce the network traffic in large homes. We propose some defense schemes being applied to the network environment of the assisted living system to prevent any external attacks.

Unluturk MS; Kurtel K

2012-08-01

366

Integration of RFID and web service for assisted living.  

Science.gov (United States)

The number of people over 65 years old throughout most stable and prosperous countries in the world is increasing. Availability of their care in their own homes is imperative because of the economic reasons and their choices where to live (World Health Organization, Definition of an older or elderly person. http://www.who.int/healthinfo/survey/ageingdefnolder/en/ ; EQUIP-European Framework for Qualifications in Home Care Services for Older People, http://www.equip-project.com ; Salonen, 2009). "Recent advancement in wireless communications and electronics has enabled the development of low-cost sensor networks. The sensor networks can be utilized in various application areas." (Akyildiz, et al. 2002) These two statements show that there is a great promise in wireless technology and utilizing it in assisted living might be very beneficial to the elderly people. In this paper, we propose software architecture called Location Windows Service (LWS) which integrates the Radio Frequency Identification (RFID) technology and the web service to build an assisted living system for elderly people at home. This architecture monitors the location of elderly people without interfering in their daily activities. Location information messages that are generated as the elderly move from room to room indicate that the elderly person is fit and healthy and going about their normal life. The communication must be timely enough to follow elderly people as they move from room to room without missing a location. Unacknowledged publishing, subscription filtering and short location change messages are also included in this software model to reduce the network traffic in large homes. We propose some defense schemes being applied to the network environment of the assisted living system to prevent any external attacks. PMID:21537853

Unluturk, Mehmet S; Kurtel, Kaan

2011-05-03

367

Introducing Tool Support for Managing Architectural Knowledge: An Experience Report  

Energy Technology Data Exchange (ETDEWEB)

Management of software architecture knowledge is vital for improving an organisation’s architectural capabilities. Despite the recognition of the importance of capturing and reusing software architecture knowledge, there is currently no suitable support mechanism available. To address this issue, we have developed a conceptual framework for managing architecture design knowledge. A web-based knowledge management tool, Process-based Architecture Knowledge Management Environment (PAKME), has been developed to support that framework. PAKME is being trialled to help systematise the architecture knowledge management and evaluation process of an industrial collaborator. This paper reports the objectives, logistics and initial findings of this project, Specifically we have deployed and used PAKME in an Australian Defence acquisition environment for evaluating architecture of a aircraft system.

Babar, Muhammad A.; Northway, Andrew; Gorton, Ian; Heuer, Paul; Nguyen, Thong

2008-04-04

368

Towards Maximum Spanning Tree Model in Web 3.0 Design and Development for Students using Discriminant Analysis  

CERN Document Server

Web 3.0 is an evolving extension of the web 2.0 scenario. The perceptions regarding web 3.0 is different from person to person . Web 3.0 Architecture supports ubiquitous connectivity, network computing, open identity, intelligent web, distributed databases and intelligent applications. Some of the technologies which lead to the design and development of web 3.0 applications are Artificial intelligence, Automated reasoning, Cognitive architecture, Semantic web . An attempt is made to capture the requirements of Students inline with web 3.0 so as to bridge the gap between the design and development of web 3.0 applications and requirements among Students. Maximum Spanning Tree modeling of the requirements facilitate the identification of key areas and key attributes in the design and development of software products for Students in Web 3.0 using Discriminant analysis. Keywords : Web 3.0, Discriminant analysis, Design and Development, Model, Maximum Spanning Tree 1.

Padma, S

2012-01-01

369

Using Web Services for Open Service and Integration  

Directory of Open Access Journals (Sweden)

Full Text Available A Web Service is a distributed application component based on the interchanging XML-encoded messages. Through standard protocols and methods, it provides distributed transaction in simplification and standardization. This Web Service can be used in the integrated information system as well as the service requirements of Open Digital Library. The purpose of this article is to tackle the problems of web services architecture, its associated standards, and issues of application.[Article content in Chinese

Shien-Chiang Yu

2003-01-01

370

Web to Semantic Web & Role of Ontology  

CERN Multimedia

In this research paper we are briefly presenting current major web problems and introducing semantic web technologies with the claim of solving existing web's problems. Furthermore we are describing Ontology as the main building block of semantic web and focusing on its contributions to semantic web progress and current limitations.

Ahmed, Zeeshan

2010-01-01

371

Building Dependable and Secure Web Services  

Directory of Open Access Journals (Sweden)

Full Text Available Web Services offer great promise for integrating and automating software applications within and between enterprises over the Internet. However, ensuring that Web Services can satisfy their clients’ requests when their clients need them is a real challenge. In this paper we describe dependability technologies, including transparent SOAP connection failover, replication, checkpointing and message logging, in addition to reliable messaging and transaction management for which there exist Web Services specifications. We also present security technologies, including encryption and digital signatures for which Web Services specifications exist, as well as other security technologies We discuss how these technologies can be applied to the components of a typical Web Services architecture to render business activities that span multiple enterprises dependable and secure.

Louise E. Moser; P. M. Michael Melliar-Smith; Wenbing Zhao

2007-01-01

372

Using Agent to Coordinate Web Services  

CERN Multimedia

Traditionally, agent and web service are two separate research areas. We figure that, through agent communication, agent is suitable to coordinate web services. However, there exist agent communication problems due to the lack of uniform, cross-platform vocabulary. Fortunately, ontology defines a vocabulary. We thus propose a new agent communication layer and present the web ontology language (OWL)-based operational ontologies that provides a declarative description. It can be accessed by various engines to facilitate agent communication. Further, in our operational ontologies, we define the mental attitudes of agents that can be shared among other agents. Our architecture enhanced the 3APL agent platform, and it is implemented as an agent communication framework. Finally, we extended the framework to be compatible with the web ontology language for service (OWL-S), and then develop a movie recommendation system with four OWL-S semantic web services on the framework. The benefits of this work are: 1) dynamic ...

Liu, C H; Chen, Jason J Y

2009-01-01

373

Making Web Annotations Persistent over Time  

CERN Multimedia

As Digital Libraries (DL) become more aligned with the web architecture, their functional components need to be fundamentally rethought in terms of URIs and HTTP. Annotation, a core scholarly activity enabled by many DL solutions, exhibits a clearly unacceptable characteristic when existing models are applied to the web: due to the representations of web resources changing over time, an annotation made about a web resource today may no longer be relevant to the representation that is served from that same resource tomorrow. We assume the existence of archived versions of resources, and combine the temporal features of the emerging Open Annotation data model with the capability offered by the Memento framework that allows seamless navigation from the URI of a resource to archived versions of that resource, and arrive at a solution that provides guarantees regarding the persistence of web annotations over time. More specifically, we provide theoretical solutions and proof-of-concept experimental evaluations for...

Sanderson, Robert

2010-01-01

374

Semantic web application for the taking of decisions for WBE systems  

Directory of Open Access Journals (Sweden)

Full Text Available In this paper a new architecture for development of Semantic Web Applications for decision taking using the paradigm ofWeb-Based Education (WBE) is presented. This architecture is based on the IEEE 1484 LTSA (Learning Technology SystemArchitecture) specification, Multi-Agent System (MAS) and the software components named Intelligent Reusable LearningComponents Object Oriented (IRLCOO). IRLCOO are a special type of Sharable Content Object (SCO) used like compositionunits under the Sharable Content Object Reusable Model (SCORM). SCORM is used to create reusable and interoperablelearning content. The new architecture is oriented to offer interoperability at level application under the philosophy ofService-Oriented Architecture (SOA).

Ruben Peredo Valderrama, Alejandro Canales Cruz

2009-01-01

375

Web Science  

Directory of Open Access Journals (Sweden)

Full Text Available The internet is now a constant in all parts of life and at all levels: personal, academic and professional. In only a few years, the internet has changed the way we relate, study, work, shop, spend our free time, etc. The web, the collection of resources accessible over the internet, has become a gargantuan oracle where people search, create and share information on any subject, and where they communicate globally, breaking down the barriers of time and space. The possibility of being connected almost all the time from anywhere means that users have a perception of the web as something that is always available to cover any need. The rapid evolution of the technology available, both hardware and software, together with its relatively low cost, means that ever more users access the web and use it for more reasons.

Julià Minguillón

2008-01-01

376

A Comparitive study: FLOWS and PSL model in Selecting the Ontologies for Dynamic Web service Selection in Semantic Web Environment  

Directory of Open Access Journals (Sweden)

Full Text Available Dynamic web service selection is a problem in semantic web environment because of the selection of ontologies. Web services(WSs) will be the building blocks of for developing the next generation applications using the service oriented architecture(SOA). Semantic web service ontologies are more important in defining the web service identification and selection. Web service provision is the process of assigning particular services to the continent tasks of business processes. Keyword-based search has been popularized by Web search services. However, due to the problems associated with polysemy and synonym, users are often unable to get the exact information they are looking for. In this paper we analyze the environment and identifying and comparing the ontology models and proposing best model for the web service selection.

Michael Raj T.F ,; Rajesh.K

2011-01-01

377

Enforcing Quality of Service within Web Services Communities  

Directory of Open Access Journals (Sweden)

Full Text Available Web services are considered as an attracting distributed approach of application/services integration over the Internet. As the number of Web Services is exponentially growing and expected to do so for the next decade, the need for categorizing and/or classifying Web Services is very crucial for their success and the success of the underlying Service Oriented architecture (SOA). Categorization aims at systematizing Web Services according to their functionalities and their Quality of Service attributes. Communities of Web Services have been used to gather Web Services based on their functionalities. In fact, Web Services in a community can offer similar and/or complementary services. In this paper, we expand Web Services communities’ classification by adding a new support layer for Quality of Service classification. This is done through Quality of Services specification, monitoring, and adaptation of Web Services within communities. A Web Service might be admitted to a community thanks to its high Quality of Service or might be ejected from a community due to its low Quality of Service. The focus of this paper is on the design and use of a managerial community to monitor and adapt Quality of Web Services (QoWS) of managerial Web Services for other communities, Web Services providers, and Web Services clients.

Mohamed Adel Serhani; Abdelghani Benharref

2011-01-01

378

Security For Wireless Sensor Network  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless sensor network is highly vulnerable to attacks because it consists of various resourceconstrained devices with their low battery power, less memory, and associated low energy. Sensor nodescommunicate among themselves via wireless links. However, there are still a lot of unresolved issues in wireless sensor networks of which security is one of the hottest research issues. Sensor networks aredeployed in hostile environments. Environmental conditions along with resource-constraints give rise to many type of security threats or attacks. Securely communication among sensor nodes is a fundamentalchallenge for providing security services in WSNs. This paper gives the security of wireless sensor network and attack at different layered architecture of WSN and their prevention.

Saurabh Singh,; Dr. Harsh Kumar Verma

2011-01-01

379

DIRAC: Secure web user interface  

International Nuclear Information System (INIS)

Traditionally the interaction between users and the Grid is done with command line tools. However, these tools are difficult to use by non-expert users providing minimal help and generating outputs not always easy to understand especially in case of errors. Graphical User Interfaces are typically limited to providing access to the monitoring or accounting information and concentrate on some particular aspects failing to cover the full spectrum of grid control tasks. To make the Grid more user friendly more complete graphical interfaces are needed. Within the DIRAC project we have attempted to construct a Web based User Interface that provides means not only for monitoring the system behavior but also allows to steer the main user activities on the grid. Using DIRAC's web interface a user can easily track jobs and data. It provides access to job information and allows performing actions on jobs such as killing or deleting. Data managers can define and monitor file transfer activity as well as check requests set by jobs. Production managers can define and follow large data productions and react if necessary by stopping or starting them. The Web Portal is build following all the grid security standards and using modern Web 2.0 technologies which allow to achieve the user experience similar to the desktop applications. Details of the DIRAC Web Portal architecture and User Interface will be presented and discussed.

2010-04-01

380

Tracheal web  

International Nuclear Information System (INIS)

[en] Congenital tracheal web is a rare entity often misdiagnosed as refractory asthma. Clinical suspicion based on patient history, examination, and pulmonary function tests should lead to its consideration. Bronchoscopy combined with CT imaging and multiplanar reconstruction is an accepted, highly sensitive means of diagnosis. (orig.)

2004-01-01

 
 
 
 
381

A Model Transformation Approach to Derive Architectural Models from Goal-Oriented Requirements Models  

Science.gov (United States)

Requirements engineering and architectural design are key activities for successful development of software systems. Both activities are strongly intertwined and interrelated, but many steps toward generating architecture models from requirements models are driven by intuition and architectural knowledge. Thus, systematic approaches that integrate requirements engineering and architectural design activities are needed. This paper presents an approach based on model transformations to generate architectural models from requirements models. The source and target languages are respectively the i* modeling language and Acme architectural description language (ADL). A real web-based recommendation system is used as case study to illustrate our approach.

Lucena, Marcia; Castro, Jaelson; Silva, Carla; Alencar, Fernanda; Santos, Emanuel; Pimentel, João

382

L3SN: A Level-Based, Large-Scale, Longevous Sensor Network System for Agriculture Information Monitoring  

Directory of Open Access Journals (Sweden)

Full Text Available We developed L3SN, a scalable, longevous, adaptive, and internet accessible wireless sensor network system for agriculture information monitoring, which is meticulously designed to meet the requirement of thousands hectares coverage, years of time monitoring and the adverse environment. The system architecture, the agriculture sensor device, the mesh protocol, and the web-based information processing platform are introduced. We also presented some implementation experience. The m