WorldWideScience
 
 
1

Virtual Sensor Web Architecture  

Science.gov (United States)

NASA envisions the development of smart sensor webs, intelligent and integrated observation network that harness distributed sensing assets, their associated continuous and complex data sets, and predictive observation processing mechanisms for timely, collaborative hazard mitigation and enhanced science productivity and reliability. This paper presents Virtual Sensor Web Infrastructure for Collaborative Science (VSICS) Architecture for sustained coordination of (numerical and distributed) model-based processing, closed-loop resource allocation, and observation planning. VSICS's key ideas include i) rich descriptions of sensors as services based on semantic markup languages like OWL and SensorML; ii) service-oriented workflow composition and repair for simple and ensemble models; event-driven workflow execution based on event-based and distributed workflow management mechanisms; and iii) development of autonomous model interaction management capabilities providing closed-loop control of collection resources driven by competing targeted observation needs. We present results from initial work on collaborative science processing involving distributed services (COSEC framework) that is being extended to create VSICS.

Bose, P.; Zimdars, A.; Hurlburt, N.; Doug, S.

2006-12-01

2

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

2013-01-01

3

Sensor Webs with a Service-Oriented Architecture for On-demand Science Products  

Science.gov (United States)

This paper describes the work being managed by the NASA Goddard Space Flight Center (GSFC) Information System Division (ISD) under a NASA Earth Science Technology Ofice (ESTO) Advanced Information System Technology (AIST) grant to develop a modular sensor web architecture which enables discovery of sensors and workflows that can create customized science via a high-level service-oriented architecture based on Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) web service standards. These capabilities serve as a prototype to a user-centric architecture for Global Earth Observing System of Systems (GEOSS). This work builds and extends previous sensor web efforts conducted at NASA/GSFC using the Earth Observing 1 (EO-1) satellite and other low-earth orbiting satellites.

Mandl, Daniel; Ungar, Stephen; Ames, Troy; Justice, Chris; Frye, Stuart; Chien, Steve; Tran, Daniel; Cappelaere, Patrice; Derezinsfi, Linda; Paules, Granville; Di, Liping; Kolitz, Stephan

2007-01-01

4

Experimenting with an Evolving Ground/Space-based Software Architecture to Enable Sensor Webs  

Science.gov (United States)

A series of ongoing experiments are being conducted at the NASA Goddard Space Flight Center to explore integrated ground and space-based software architectures enabling sensor webs. A sensor web, as defined by Steve Talabac at NASA Goddard Space Flight Center(GSFC), is a coherent set of distributed nodes interconnected by a communications fabric, that collectively behave as a single, dynamically adaptive, observing system. The nodes can be comprised of satellites, ground instruments, computing nodes etc. Sensor web capability requires autonomous management of constellation resources. This becomes progressively more important as more and more satellites share resource, such as communication channels and ground station,s while automatically coordinating their activities. There have been five ongoing activities which include an effort to standardize a set of middleware. This paper will describe one set of activities using the Earth Observing 1 satellite, which used a variety of ground and flight software along with other satellites and ground sensors to prototype a sensor web. This activity allowed us to explore where the difficulties that occur in the assembly of sensor webs given today s technology. We will present an overview of the software system architecture, some key experiments and lessons learned to facilitate better sensor webs in the future.

mandl, Daniel; Frye, Stuart

2005-01-01

5

Sensor Web Architectural Concepts and Implementation Challenges - An Heuristic Approach  

Science.gov (United States)

There is a significant interest in the Earth Science remote sensing community to increase the number of observations. The obvious reasons for such a push is to improve the temporal and surface coverage of measurements. However, there is little analysis available in terms of benefits, costs and optimized set of sensors needed to make these necessary observations. In reality, this is a complex problem that should be carefully studied and balanced over many boundaries. For example, the question of technology maturity versus users desire to obtain additional measurements is non congruent. This is further complicated by the limitations of the laws of physics and the economic conditions. With the advent of advance technology, it is anticipated that the cost of the spacecraft technology will become more affordable. However, the specialized detector subsystems, and the precision flying techniques may still require substantial innovation, development time and cost. Additionally, the space deployment scheme should also be given a careful attention because of a high expense. Nonetheless, it is important to carefully examine the science priorities and steer the development efforts that can commensurate with the tangible requirements. This paper outlines a possible set of architectural concepts, operational scenarios and potential benefits of one scheme versus another. It further makes some suggestions where one can draw some boundary conditions to incrementally solve this predicament.

Habib, Shahid; Hildebrand, Peter

2002-01-01

6

A Web 2.0 and OGC Standards Enabled Sensor Web Architecture for Global Earth Observing System of Systems  

Science.gov (United States)

This paper will describe the progress of a 3 year research award from the NASA Earth Science Technology Office (ESTO) that began October 1, 2006, in response to a NASA Announcement of Research Opportunity on the topic of sensor webs. The key goal of this research is to prototype an interoperable sensor architecture that will enable interoperability between a heterogeneous set of space-based, Unmanned Aerial System (UAS)-based and ground based sensors. Among the key capabilities being pursued is the ability to automatically discover and task the sensors via the Internet and to automatically discover and assemble the necessary science processing algorithms into workflows in order to transform the sensor data into valuable science products. Our first set of sensor web demonstrations will prototype science products useful in managing wildfires and will use such assets as the Earth Observing 1 spacecraft, managed out of NASA/GSFC, a UASbased instrument, managed out of Ames and some automated ground weather stations, managed by the Forest Service. Also, we are collaborating with some of the other ESTO awardees to expand this demonstration and create synergy between our research efforts. Finally, we are making use of Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) suite of standards and some Web 2.0 capabilities to Beverage emerging technologies and standards. This research will demonstrate and validate a path for rapid, low cost sensor integration, which is not tied to a particular system, and thus be able to absorb new assets in an easily evolvable, coordinated manner. This in turn will help to facilitate the United States contribution to the Global Earth Observation System of Systems (GEOSS), as agreed by the U.S. and 60 other countries at the third Earth Observation Summit held in February of 2005.

Mandl, Daniel; Unger, Stephen; Ames, Troy; Frye, Stuart; Chien, Steve; Cappelaere, Pat; Tran, Danny; Derezinski, Linda; Paules, Granville

2007-01-01

7

An Interoperable Architecture for Air Pollution Early Warning System Based on Sensor Web  

Science.gov (United States)

Environmental monitoring systems deal with time-sensitive issues which require quick responses in emergency situations. Handling the sensor observations in near real-time and obtaining valuable information is challenging issues in these systems from a technical and scientific point of view. The ever-increasing population growth in urban areas has caused certain problems in developing countries, which has direct or indirect impact on human life. One of applicable solution for controlling and managing air quality by considering real time and update air quality information gathered by spatially distributed sensors in mega cities, using sensor web technology for developing monitoring and early warning systems. Urban air quality monitoring systems using functionalities of geospatial information system as a platform for analysing, processing, and visualization of data in combination with Sensor Web for supporting decision support systems in disaster management and emergency situations. This system uses Sensor Web Enablement (SWE) framework of the Open Geospatial Consortium (OGC), which offers a standard framework that allows the integration of sensors and sensor data into spatial data infrastructures. SWE framework introduces standards for services to access sensor data and discover events from sensor data streams as well as definition set of standards for the description of sensors and the encoding of measurements. The presented system provides capabilities to collect, transfer, share, process air quality sensor data and disseminate air quality status in real-time. It is possible to overcome interoperability challenges by using standard framework. In a routine scenario, air quality data measured by in-situ sensors are communicated to central station where data is analysed and processed. The extracted air quality status is processed for discovering emergency situations, and if necessary air quality reports are sent to the authorities. This research proposed an architecture to represent how integrate air quality sensor data stream into geospatial data infrastructure to present an interoperable air quality monitoring system for supporting disaster management systems by real time information. Developed system tested on Tehran air pollution sensors for calculating Air Quality Index (AQI) for CO pollutant and subsequently notifying registered users in emergency cases by sending warning E-mails. Air quality monitoring portal used to retrieving and visualize sensor observation through interoperable framework. This system provides capabilities to retrieve SOS observation using WPS in a cascaded service chaining pattern for monitoring trend of timely sensor observation.

Samadzadegan, F.; Zahmatkesh, H.; Saber, M.; Ghazi khanlou, H. J.

2013-09-01

8

Space-Based Sensor Web for Earth Science Applications: An Integrated Architecture for Providing Societal Benefits  

Science.gov (United States)

There is a significant interest in the Earth Science research and user remote sensing community to substantially increase the number of useful observations relative to the current frequency of collection. The obvious reason for such a push is to improve the temporal, spectral, and spatial coverage of the area(s) under investigation. However, there is little analysis available in terms of the benefits, costs and the optimal set of sensors needed to make the necessary observations. Classic observing system solutions may no longer be applicable because of their point design philosophy. Instead, a new intelligent data collection system paradigm employing both reactive and proactive measurement strategies with adaptability to the dynamics of the phenomena should be developed. This is a complex problem that should be carefully studied and balanced across various boundaries including: science, modeling, applications, and technology. Modeling plays a crucial role in making useful predictions about naturally occurring or human-induced phenomena In particular, modeling can serve to mitigate the potentially deleterious impacts a phenomenon may have on human life, property, and the economy. This is especially significant when one is interested in learning about the dynamics of, for example, the spread of forest fires, regional to large-scale air quality issues, the spread of the harmful invasive species, or the atmospheric transport of volcanic plumes and ash. This paper identifies and examines these challenging issues and presents architectural alternatives for an integrated sensor web to provide observing scenarios driving the requisite dynamic spatial, spectral, and temporal characteristics to address these key application areas. A special emphasis is placed on the observing systems and its operational aspects in serving the multiple users and stakeholders in providing societal benefits. We also address how such systems will take advantage of technological advancement in small spacecraft and emerging information technologies, and how sensor web options may be realized and made affordable. Specialized detector subsystems and precision flying techniques may still require substantial innovation, development time and cost: we have presented the considerations for these issues. Finally, data and information gathering and compression techniques are also briefly described.

Habib, Shahid; Talabac, Stephen J.

2004-01-01

9

Sensor Webs in Virtual Globes  

CERN Document Server

A sensor web is a collection of heterogeneous sensors which autonomously reacts to the observed environment. The SouthEast Alaska MOnitoring Network for Science, Telecommunications, Education, and Research (SEAMONSTER) project has implemented a sensor web in partially glaciated watersheds near Juneau, Alaska, on the edge of the Juneau Icefield. By coupling the SEAMONSTER sensor web with digital earth technologies the scientific utility, education and public outreach efforts, and sensor web management of the project all greatly benefit. This paper describes the scientific motivation for a sensor web, the technology developed to implement the sensor web, the software developed to couple the sensor web with digital earth technologies, and demonstrates the SEAMONSTER sensor web in a digital earth framework.

Heavner, M; Hood, E; Connor, C

2009-01-01

10

Sensor Web Enablement for Coastal Buoy Systems  

Science.gov (United States)

Coastal buoys and stations provide frequent, high-quality marine observations for weather service, public safety, atmospheric, and oceanographic study. However, sharing of the generated datasets, information, and results, between geographically distributed organizations often proves to be challenging. This is due to the complicated steps involved in data discovery and conversion of the data into usable information due to problems of syntactic, structural, and semantic heterogeneity in the datasets. Therefore, a standardized modeling framework is desired for the coastal buoys to provide enhanced capabilities for interoperability and to better disseminate the information. This study is developing an interoperable framework for coastal buoys using Sensor Model Language (SensorML) and other components (e.g., Observations & Measurements Schema (O&M), Transducer Markup Language (TransducerML), Sensor Observation Service (SOS), etc) of the OpenGeospatial Consortium (OGC) Sensor Web Enablement (SWE). SensorML is a standard for the description of measurement devices and more complex measurement systems, in order to enable automatic processing of sensor data by generic software. In this study, buoys operated by the National Data Buoy Center (NDBC) with different payloads (e.g., ARES, DACT, DART, GSBP, MARS, and VEEP) were described using SensorML. Each of these payloads has a variety of sensors used to measure the marine parameters (e.g., sea surface temperature, wind direction, wind speed, water level). Our framework of the proposed Coastal Sensor Web Enablement (CSWE) middleware for buoy systems is built upon the existing OGC web services. The Web service specifications such as Sensor Planning Service (SPS), Sensor Observation Service (SOS), and Sensor Alert Service (SAS) define how data collection requests are expressed, observations retrieved, and alert or alarm conditions defined. The integration of these components in the proposed architecture provides access to observations from sensors and sensor systems in a standard way that is consistent for all sensor systems including remote, in-situ, fixed and mobile sensors.

Ling, Y.; Durbha, S. S.; King, R. L.

2006-12-01

11

Autonomous Mission Operations for Sensor Webs  

Science.gov (United States)

We present interim results of a 2005 ROSES AIST project entitled, "Using Intelligent Agents to Form a Sensor Web for Autonomous Mission Operations", or SWAMO. The goal of the SWAMO project is to shift the control of spacecraft missions from a ground-based, centrally controlled architecture to a collaborative, distributed set of intelligent agents. The network of intelligent agents intends to reduce management requirements by utilizing model-based system prediction and autonomic model/agent collaboration. SWAMO agents are distributed throughout the Sensor Web environment, which may include multiple spacecraft, aircraft, ground systems, and ocean systems, as well as manned operations centers. The agents monitor and manage sensor platforms, Earth sensing systems, and Earth sensing models and processes. The SWAMO agents form a Sensor Web of agents via peer-to-peer coordination. Some of the intelligent agents are mobile and able to traverse between on-orbit and ground-based systems. Other agents in the network are responsible for encapsulating system models to perform prediction of future behavior of the modeled subsystems and components to which they are assigned. The software agents use semantic web technologies to enable improved information sharing among the operational entities of the Sensor Web. The semantics include ontological conceptualizations of the Sensor Web environment, plus conceptualizations of the SWAMO agents themselves. By conceptualizations of the agents, we mean knowledge of their state, operational capabilities, current operational capacities, Web Service search and discovery results, agent collaboration rules, etc. The need for ontological conceptualizations over the agents is to enable autonomous and autonomic operations of the Sensor Web. The SWAMO ontology enables automated decision making and responses to the dynamic Sensor Web environment and to end user science requests. The current ontology is compatible with Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) Sensor Model Language (SensorML) concepts and structures. The agents are currently deployed on the U.S. Naval Academy MidSTAR-1 satellite and are actively managing the power subsystem on-orbit without the need for human intervention.

Underbrink, A.; Witt, K.; Stanley, J.; Mandl, D.

2008-12-01

12

Multi-Sensor Architectures  

DEFF Research Database (Denmark)

The use of multiple sensors typically requires the fusion of data from different type of sensors. The combined use of such a data has the potential to give an efficient, high quality and reliable estimation. Input data from different sensors allows the introduction of target attributes (target type, size) into the association logic. This requires a more general association logic, in which both the physical position parameters and the target attributes can be used simultaneously. Although, the data fusion from a number of sensors could provide better and reliable estimation but abundance of information is to be handled. Therefore, more extensive computer resources are needed for such a system. The parallel processing technique could be an alternative for such a system. The main objective of this research is to provide a real time task allocation strategy for data processing using multiple processing units for same type of multiple sensors, typically radar in our case.

Hussain, Dil Muhammad Akbar; Ahmed, Zaki

2012-01-01

13

Sensor Network Architectures for Monitoring Underwater Pipelines  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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...

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

2011-01-01

14

Architectural patterns regarding web application domain usability  

Directory of Open Access Journals (Sweden)

Full Text Available 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.

José Luis Arciniegas Herrera

2010-05-01

15

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.

Christoph Stasch

2009-04-01

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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 incompatible protocols complicates the integration of sensors into observing systems. The standardized Web service interfaces and data encodings defined within OGC’s Sensor Web Enablement (SWE) framework m...

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

2011-01-01

17

An Extensible Cloud Architecture Model for Heterogeneous Sensor Services  

Directory of Open Access Journals (Sweden)

Full Text Available This paper aims to examine how the sensor information can be shared, through a new resource called “cloud”. The recent research issue in integrating Wireless sensor Networks with Cloud is to establish a faster communication link between the two. The wireless sensor networks are used to sense and collect information required. The sensor information is deployed into the cloud through the sensor profile for web services. The Sensor Profile for Web Services specifies a lightweight subset of the overall Web services protocol suite that is appropriate for network-connected sensors. Cloud generally offers resources on demand. Since wireless sensor networks are limited in their processing power, battery life and communication speed, cloud computing usually offers the opposite, which makes it attractive for long term observations, analysis and use in different kinds of environments. In this paper a model is presented, which combines the concept of wireless sensor networks with the cloud computing paradigm, and show how both can benefit from this combination. Sensor data access is thus moved from loosely managed system to a well managed cloud. The integration of sensor information into the cloud through the sensor as a service paradigm proves the faster communication establishment. The scalability of this approach seems to be unlimited, since wireless sensor networks operate independently, and are connected to the cloud computing environment through a scalable number of wireless sensor network communication gateways. The cloud computing environment itself offers a scalable infrastructure, which makes it very attractive. The main goal is to design a flexible architecture in which sensor network’s information can be accessed by applications efficiently.

R.S. Ponmagal

2011-01-01

18

SPIM Architecture for MVC based Web Applications  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The Model / View / Controller design pattern divides an application environment into three components to handle the user-interactions, computations and output respectively. This separation greatly favors architectural reusability. The pattern works well in the case of single-address space and not proven to be efficient for web applications involving multiple address spaces. Web applications force the designers to decide which of the components of the pattern are to be partit...

Sridaran, R.; Padmavathi, G.; Iyakutti, K.; Mani, M. N. S.

2010-01-01

19

Semantic Architecture for Web application Security  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 architectur...

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

2012-01-01

20

Hybrid architecture for building secure sensor networks  

Science.gov (United States)

Sensor networks have various communication and security architectural concerns. Three approaches are defined to address these concerns for sensor networks. The first area is the utilization of new computing architectures that leverage embedded virtualization software on the sensor. Deploying a small, embedded virtualization operating system on the sensor nodes that is designed to communicate to low-cost cloud computing infrastructure in the network is the foundation to delivering low-cost, secure sensor networks. The second area focuses on securing the sensor. Sensor security components include developing an identification scheme, and leveraging authentication algorithms and protocols that address security assurance within the physical, communication network, and application layers. This function will primarily be accomplished through encrypting the communication channel and integrating sensor network firewall and intrusion detection/prevention components to the sensor network architecture. Hence, sensor networks will be able to maintain high levels of security. The third area addresses the real-time and high priority nature of the data that sensor networks collect. This function requires that a quality-of-service (QoS) definition and algorithm be developed for delivering the right data at the right time. A hybrid architecture is proposed that combines software and hardware features to handle network traffic with diverse QoS requirements.

Owens, Ken R., Jr.; Watkins, Steve E.

2012-04-01

 
 
 
 
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SPIM Architecture for MVC based Web Applications  

CERN Document Server

The Model / View / Controller design pattern divides an application environment into three components to handle the user-interactions, computations and output respectively. This separation greatly favors architectural reusability. The pattern works well in the case of single-address space and not proven to be efficient for web applications involving multiple address spaces. Web applications force the designers to decide which of the components of the pattern are to be partitioned between the server and client(s) before the design phase commences. For any rapidly growing web application, it is very difficult to incorporate future changes in policies related to partitioning. One solution to this problem is to duplicate the Model and controller components at both server and client(s). However, this may add further problems like delayed data fetch, security and scalability issues. In order to overcome this, a new architecture SPIM has been proposed that deals with the partitioning problem in an alternative way. S...

Sridaran, R; Iyakutti, K; Mani, M N S

2010-01-01

22

A ubiquitous sensor network platform for integrating smart devices into the semantic sensor web.  

Science.gov (United States)

Ongoing Sensor Web developments make a growing amount of heterogeneous sensor data available to smart devices. This is generating an increasing demand for homogeneous mechanisms to access, publish and share real-world information. This paper discusses, first, an architectural solution based on Next Generation Networks: a pilot Telco Ubiquitous Sensor Network (USN) Platform that embeds several OGC® Sensor Web services. This platform has already been deployed in large scale projects. Second, the USN-Platform is extended to explore a first approach to Semantic Sensor Web principles and technologies, so that smart devices can access Sensor Web data, allowing them also to share richer (semantically interpreted) information. An experimental scenario is presented: a smart car that consumes and produces real-world information which is integrated into the Semantic Sensor Web through a Telco USN-Platform. Performance tests revealed that observation publishing times with our experimental system were well within limits compatible with the adequate operation of smart safety assistance systems in vehicles. On the other hand, response times for complex queries on large repositories may be inappropriate for rapid reaction needs. PMID:24945678

de Vera, David Díaz Pardo; Izquierdo, Alvaro Sigüenza; Vercher, Jesús Bernat; Hernández Gómez, Luis Alfonso

2014-01-01

23

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

2013-01-01

24

From sensor data to the perception of phenomena : Software architecture for online access and offline analysis  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In this paper, we present a software architecture that enhances the 3D visualization of sensors' data. We aim to better explore and analyze sensors' data dealing with atmospheric pollutants. Hence, our software architecture provides two techniques to interact with our geospatial data : a light web application for an easy access and visualization of this data, and a 3D GIS that allows an enhanced analysis of the geospatial data as well as the atmospheric pollutants. In consequence, this work h...

Cheaib, Nader; Ruas, Anne; Gaborit, Olivier

2013-01-01

25

A web services architecture for learning object discovery and assembly  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Courseware systems are often based on an assembly of different components, addressing the different needs of storage and delivery functionality. The Learning Technology Standard Architecture LTSA provides a generic architectural framework for these systems. Recent developments in Web technology – e.g. the Web services framework – have greatly enhanced the flexible and interoperable implementation of courseware architectures. We argue that in order to make the Web services philosophy work,...

Pahl, Claus; Barrett, Ronan

2004-01-01

26

Secure Architecture Evaluation for Agent Based Web Service Discovery  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web Services can be published, discovered and invoked over the web. Web Services can be implemented in any available technology but they are accessible through a standard protocol. With web services being accepted and deployed in both research and industrial areas, the security related issues become important. In this paper, architecture evaluated for web service on negotiating a mutually acceptable security policy based on web service description language to both consumer and provider [1]. I...

Prasath, V.; Baskarane, R.; Savaridassan, P.

2010-01-01

27

Architecture for web-based image processing  

Science.gov (United States)

A computer systems architecture for processing medical images and other data coming over the Web is proposed. The architecture comprises a Java engine for communicating images over the Internet, storing data in local memory, doing floating point calculations, and a coprocessor MIMD parallel DSP for doing fine-grained operations found in video, graphics, and image processing applications. The local memory is shared between the Java engine and the parallel DSP. Data coming from the Web is stored in the local memory. This approach avoids the frequent movement of image data between a host processor's memory and an image processor's memory, found in many image processing systems. A low-power and high performance parallel DSP architecture containing lots of processors interconnected by a segmented hierarchical network has been developed. The instruction set of the 16-bit processor supports video, graphics, and image processing calculations. Two's complement arithmetic, saturation arithmetic, and packed instructions are supported. Higher data precision such as 32-bit and 64-bit can be achieved by cascading processors. A VLSI chip implementation of the architecture containing 64 processors organized in 16 clusters and interconnected by a statically programmable hierarchical bus is in progress. The buses are segmentable by programming switches on the bus. The instruction memory of each processor has sixteen 40-bit words. Data streaming through the processor is manipulated by the instructions. Multiple operations can be performed in a single cycle in a processor. A low-power handshake protocol is used for synchronization between the sender and the receiver of data. Temporary storage for data and filter coefficients is provided in each chip. A 256 by 16 memory unit is included in each of the 16 clusters. The memory unit can be used as a delay line, FIFO, lookup table or random access memory. The architecture is scalable with technology. Portable multimedia terminals like U.C. Berkeley's InfoPad can be developed using the proposed parallel DSP architecture, color display, pen interface, and wireless network communication for use in clinics, hospitals, homes, offices, and factories.

Srini, Vason P.; Pini, David; Armstrong, Matt D.; Alalusi, Sayf H.; Thendean, John; Ueng, Sain-Zee; Bushong, David P.; Borowski, Erek S.; Chao, Elaine; Rabaey, Jan M.

1997-09-01

28

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

2012-03-01

29

Video sensor architecture for surveillance applications.  

Science.gov (United States)

This paper introduces a flexible hardware and software architecture for a smart video sensor. This sensor has been applied in a video surveillance application where some of these video sensors are deployed, constituting the sensory nodes of a distributed surveillance system. In this system, a video sensor node processes images locally in order to extract objects of interest, and classify them. The sensor node reports the processing results to other nodes in the cloud (a user or higher level software) in the form of an XML description. The hardware architecture of each sensor node has been developed using two DSP processors and an FPGA that controls, in a flexible way, the interconnection among processors and the image data flow. The developed node software is based on pluggable components and runs on a provided execution run-time. Some basic and application-specific software components have been developed, in particular: acquisition, segmentation, labeling, tracking, classification and feature extraction. Preliminary results demonstrate that the system can achieve up to 7.5 frames per second in the worst case, and the true positive rates in the classification of objects are better than 80%. PMID:22438723

Sánchez, Jordi; Benet, Ginés; Simó, José E

2012-01-01

30

Design Features for the Social Web: The Architecture of Deme  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We characterize the "social Web" and argue for several features that are desirable for users of socially oriented web applications. We describe the architecture of Deme, a web content management system (WCMS) and extensible framework, and show how it implements these desired features. We then compare Deme on our desiderata with other web technologies: traditional HTML, previous open source WCMSs (illustrated by Drupal), commercial Web 2.0 applications, and open-source, objec...

Davies, Todd; Mintz, Mike D.

2013-01-01

31

Wireless sensor web for rover planetary exploration  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Together with the “traditional“ approach, during the last years a new concept of planetary surface exploration has been introduced and investigated by the space community, including the European Space Agency (ESA). The concept consists in deploying a number of sensors communicating among themselves in a wireless networked architecture (WSN). These sensors, altogether, constitute a distributed instrument with the potential of broadening the capabilities of making science on and ...

Medina, A.; Negueruela, C.; Mollinedo, L.; Gandia, F.; Barrientos Cruz, Antonio; Rossi, Claudio; Sanz Mun?oz, David; Puiatti, Alessandro; Dufour, Jean Francois

2010-01-01

32

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

2012-08-01

33

Sharing Human-Generated Observations by Integrating HMI and the Semantic Sensor Web  

Directory of Open Access Journals (Sweden)

Full Text Available Current “Internet of Things” concepts point to a future where connected objects gather meaningful information about their environment and share it with other objects and people. In particular, objects embedding Human Machine Interaction (HMI, such as mobile devices and, increasingly, connected vehicles, home appliances, urban interactive infrastructures, etc., may not only be conceived as sources of sensor information, but, through interaction with their users, they can also produce highly valuable context-aware human-generated observations. We believe that the great promise offered by combining and sharing all of the different sources of information available can be realized through the integration of HMI and Semantic Sensor Web technologies. This paper presents a technological framework that harmonizes two of the most influential HMI and Sensor Web initiatives: the W3C’s Multimodal Architecture and Interfaces (MMI and the Open Geospatial Consortium (OGC Sensor Web Enablement (SWE with its semantic extension, respectively. Although the proposed framework is general enough to be applied in a variety of connected objects integrating HMI, a particular development is presented for a connected car scenario where drivers’ observations about the traffic or their environment are shared across the Semantic Sensor Web. For implementation and evaluation purposes an on-board OSGi (Open Services Gateway Initiative architecture was built, integrating several available HMI, Sensor Web and Semantic Web technologies. A technical performance test and a conceptual validation of the scenario with potential users are reported, with results suggesting the approach is sound.

David Conejero

2012-05-01

34

Sharing human-generated observations by integrating HMI and the Semantic Sensor Web.  

Science.gov (United States)

Current "Internet of Things" concepts point to a future where connected objects gather meaningful information about their environment and share it with other objects and people. In particular, objects embedding Human Machine Interaction (HMI), such as mobile devices and, increasingly, connected vehicles, home appliances, urban interactive infrastructures, etc., may not only be conceived as sources of sensor information, but, through interaction with their users, they can also produce highly valuable context-aware human-generated observations. We believe that the great promise offered by combining and sharing all of the different sources of information available can be realized through the integration of HMI and Semantic Sensor Web technologies. This paper presents a technological framework that harmonizes two of the most influential HMI and Sensor Web initiatives: the W3C's Multimodal Architecture and Interfaces (MMI) and the Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) with its semantic extension, respectively. Although the proposed framework is general enough to be applied in a variety of connected objects integrating HMI, a particular development is presented for a connected car scenario where drivers' observations about the traffic or their environment are shared across the Semantic Sensor Web. For implementation and evaluation purposes an on-board OSGi (Open Services Gateway Initiative) architecture was built, integrating several available HMI, Sensor Web and Semantic Web technologies. A technical performance test and a conceptual validation of the scenario with potential users are reported, with results suggesting the approach is sound. PMID:22778643

Sigüenza, Alvaro; Díaz-Pardo, David; Bernat, Jesús; Vancea, Vasile; Blanco, José Luis; Conejero, David; Gómez, Luis Hernández

2012-01-01

35

A conceptual architecture for semantic web services development and deployment  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Several extensions of the Web Services Framework (WSF) have been proposed. The combination with Semantic Web technologies introduces a notion of semantics, which can enhance scalability through automation. Service composition to processes is an equally important issue. Ontology technology – the core of the Semantic Web – can be the central building block of an extension endeavour. We present a conceptual architecture for ontology-based Web service development and deployment. The developme...

Pahl, Claus

2005-01-01

36

Lessons Learned from a Collaborative Sensor Web Prototype  

Science.gov (United States)

This paper describes the Sensor Web Application Prototype (SWAP) system that was developed for the Earth Science Technology Office (ESTO). The SWAP is aimed at providing an initial engineering proof-of-concept prototype highlighting sensor collaboration, dynamic cause-effect relationship between sensors, dynamic reconfiguration, and remote monitoring of sensor webs.

Ames, Troy; Case, Lynne; Krahe, Chris; Hess, Melissa; Hennessy, Joseph F. (Technical Monitor)

2002-01-01

37

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

2006-01-01

38

Visual Architecture based Web Information Extraction  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 l...

Oswalt Manoj, S.

2011-01-01

39

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

2011-06-01

40

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

2002-01-01

 
 
 
 
41

An architecture-centric platform and tool chain for developing, testing and managing wireless sensor networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

ScatterClipse is a plugin-oriented toolchain for the automated testing, development and management of applications running on Wireless Sensor Networks. The main goal is the furthermost automated generation of software system families for the ScatterWeb sensor boards. The architecture centric method of the model driven paradigm is used for automation. The ScatterClipse’s novel approach lies in the accomplishment of the integration of visual automated application debugging and WSN-manageme...

Al Saad, Mohammad

2010-01-01

42

A Web-Based System for Managing Software Architectural Knowledge  

Science.gov (United States)

The Management of architectural knowledge is vital for improving an organization's architectural capabilities. Despite the recognition of the importance of capturing and reusing architectural knowledge, there is no suitable support mechanism. We have developed a conceptual framework for capturing and using architectural knowledge to support the software architecture process. A knowledge management system is envisioned to support the proposed framework. Such a system should facilitate architectural knowledge sharing among stakeholders, who may be collocated or geographically distributed. This chapter presents and discusses the design, implementation, and deployment details of a web-based architectural knowledge management system, called PAKME, to support the software architecture process. This chapter also discusses different usages of PAKME in the context of the software architecture process. The chapter concludes with a brief description of the use of PAKME in an industrial setting.

Babar, Muhammad Ali

43

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.

Ralf Denzer

2008-03-01

44

Dynamic Web Service Composition within a Service-Oriented Architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Increasing automation requires open, distributed, service-oriented systems capable of multicriteria-driven, dynamic adaptation for appropriate response to changing operating conditions. We combine a simple architecture with a novel algorithm to enable openness, distribution, and multi-criteria-driven service composition at runtime. The service-oriented architecture involves mediator web services coordinating other web services into compositions necessary to fulfil user requests. By basing med...

Jureta, Ivan; Faulkner, Ste?phane; Achbany, Youssef; Saerens, Marco

2007-01-01

45

An Examination of System Architectures for Distributing Sensor Data Via Ethernet Networks  

Energy Technology Data Exchange (ETDEWEB)

Application of the World Wide Web (WWW) for the transfer of sensor data from remote locations to laboratories and offices is a largely ignored application of the WWW. We have investigated several architectures for this application including simple web server/client architectures and variations of this approach. In addition, we have evaluated several commercial approaches and other techniques that have been investigated and are in the literature. Finally, we have provided conclusions based on the results of our study offering suggestions about the advantages and disadvantages of each of the approaches studied.

PFEIFER, KENT B.; CERNOSEK, RICHARD W.; MARTIN, STEPHEN J.; WALDSCHMIDT, R.L.; RUMPF, A.N.

2001-01-01

46

A software architecture for dynamically generated adaptive Web stores  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We provide technical details about the software and hardware architecture of SETA, a prototype toolkit for the creation of Web stores which personalize the interaction with customers. SETA is based on a multi-agent architecture and on the use of MAS technologies, which support a seamless communication among the system agents and an easy distribution of such agents on different computers.

Goy, Annamaria; Ardissono, Liliana; Petrone, Giovanna; Segnan, Marino

2001-01-01

47

A Novel Architecture for Topic Specific Parallel Web Crawler  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The World Wide Web is an interlinked collection of billions of web documents. Due to the growing and dynamic nature of the web, it has become a challenge to traverse all URLs in the web documents by a crawler module. So it has become imperative to parallelize a crawling process. The crawler process is further being parallelized in the form ecology of crawler workers that in parallel download information from the web. This paper proposes a novel architecture of parallel crawler, which is based...

Navita; Mahesh,

2014-01-01

48

DESIGNING DEPENDABLE AGILE LAYERED WEB SERVICES SECURITY ARCHITECTURE SOLUTIONS  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 standar...

Upendra Kumar, M.; Sravan Kumar, Dr D.; Padmaja Rani, Dr B.; Venkateswara Rao, K.

2011-01-01

49

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

50

SensorWeb Evolution Using the Earth Observing One (EO-1) Satellite as a Test Platform  

Science.gov (United States)

The Earth Observing One (EO-1) satellite was launched in November 2000 as a one year technology demonstration mission for a variety of space technologies. After the first year, in addition to collecting science data from its instruments, the EO-1 mission has been used as a testbed for a variety of technologies which provide various automation capabilities and which have been used as a pathfinder for the creation of SensorWebs. A SensorWeb is the integration of variety of space, airborne and ground sensors into a loosely coupled collaborative sensor system that automatically provides useful data products. Typically, a SensorWeb is comprised of heterogeneous sensors tied together with a messaging architecture and web services. This paper provides an overview of the various technologies that were tested and eventually folded into normal operations. As these technologies were folded in, the nature of operations transformed. The SensorWeb software enables easy connectivity for collaboration with sensors, but the side benefit is that it improved the EO-1 operational efficiency. This paper presents the various phases of EO-1 operation over the past 12 years and also presents operational efficiency gains demonstrated by some metrics.

Mandl, Daniel; Frye, Stuart; Cappelaere, Pat; Ly, Vuong; Handy, Matthew; Chien, Steve; Grossman, Robert; Tran, Daniel

2012-01-01

51

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

2011-12-01

52

A Hybrid Web Browser Architecture for Mobile Devices  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web browsing on mobile networks is slow in comparison to wired or Wi-Fi networks. Particularly, the connection establishment phase including DNS lookups and TCP handshakes takes a long time on mobile networks due to its long round-trip latency. In this paper, we propose a novel web browser architecture that aims to improve mobile web browsing performance. Our approach delegates the connection establishment and HTTP header field delivery tasks to a dedicated proxy server locate...

Cho, J.; Seo, E.; Jeong, J.

2014-01-01

53

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.

Erik Reimhult

2008-03-01

54

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

55

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 i...

Al-feel, Haytham T.; Magdy Koutb; Hoda Suoror

2008-01-01

56

Web Services Security Architectures for Secure Service Oriented Analysis and Design  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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, Dr P. Suresh Varma

2011-01-01

57

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

2011-04-01

58

A Novel Architecture for Topic Specific Parallel Web Crawler  

Directory of Open Access Journals (Sweden)

Full Text Available The World Wide Web is an interlinked collection of billions of web documents. Due to the growing and dynamic nature of the web, it has become a challenge to traverse all URLs in the web documents by a crawler module. So it has become imperative to parallelize a crawling process. The crawler process is further being parallelized in the form ecology of crawler workers that in parallel download information from the web. This paper proposes a novel architecture of parallel crawler, which is based on topic specific crawling, makes crawling task more effective, scalable and load-sharing among the different crawlers which parallel downloading the web pages related to different topics. The proposed crawler will crawl and download the web pages which are related to given topic(s.

Navita

2014-05-01

59

Future Web Growth and its Consequences for Web Search Architectures  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Introduction: Before embarking on the design of any computer system it is first necessary to assess the magnitude of the problem. In the case of a web search engine this assessment amounts to determining the current size of the web, the growth rate of the web, and the quantity of computing resource necessary to search it, and projecting the historical growth of this into the future. Method: The over 20 year history of the web makes it possible to make short-term projections ...

Trotman, Andrew; Zhang, Jinglan

2013-01-01

60

A Lightweight Access for Hybrid Mobile Web Cloud Content Architecture  

Directory of Open Access Journals (Sweden)

Full Text Available The web was first design to just provide information that could be hosted over traditional client server model, the fast growth of web content and large numbers of web content today, trend to utilize the cloud computing and hyper mobile web, which provide instant computing power, scalability, availability, saving time and administration effort. Today there is an increasing demand for accessing the Internet from mobile devices, which becoming very popular, mobile web access now is an integral part of our lives, as the majority of current web content ignore the mobility, which considered as a great challenge for web content creators. The main requirement when talking about the context of web future, is to enhance both features of cloud computing and mobile web content, by achieving the hybrid mobile web cloud content this allow us faster access technique, and enjoy with most benefits for mobile mashup for cloud computing. The main contribution of this paper is to combine the mobile web with cloud computing, to introduce an innovative computing model, called mobile cloud computing. By implementation the proposed architecture style experimental results show that the access response and excitation time is decreased, we gain a minimized transfer data size, and strongly utilizing the three screen vision view.

Shawkat K. Guirguis

2014-09-01

 
 
 
 
61

A resource-oriented architecture for a Geospatial Web  

Science.gov (United States)

In this presentation we discuss some architectural issues on the design of an architecture for a Geospatial Web, that is an information system for sharing geospatial resources according to the Web paradigm. The success of the Web in building a multi-purpose information space, has raised questions about the possibility of adopting the same approach for systems dedicated to the sharing of more specific resources, such as the geospatial information, that is information characterized by spatial/temporal reference. To this aim an investigation on the nature of the Web and on the validity of its paradigm for geospatial resources is required. The Web was born in the early 90's to provide "a shared information space through which people and machines could communicate" [Berners-Lee 1996]. It was originally built around a small set of specifications (e.g. URI, HTTP, HTML, etc.); however, in the last two decades several other technologies and specifications have been introduced in order to extend its capabilities. Most of them (e.g. the SOAP family) actually aimed to transform the Web in a generic Distributed Computing Infrastructure. While these efforts were definitely successful enabling the adoption of service-oriented approaches for machine-to-machine interactions supporting complex business processes (e.g. for e-Government and e-Business applications), they do not fit in the original concept of the Web. In the year 2000, R. T. Fielding, one of the designers of the original Web specifications, proposes a new architectural style for distributed systems, called REST (Representational State Transfer), aiming to capture the fundamental characteristics of the Web as it was originally conceived [Fielding 2000]. In this view, the nature of the Web lies not so much in the technologies, as in the way they are used. Maintaining the Web architecture conform to the REST style would then assure the scalability, extensibility and low entry barrier of the original Web. On the contrary, systems using the same Web technologies and specifications but according to a different architectural style, despite their usefulness, should not be considered part of the Web. If the REST style captures the significant Web characteristics, then, in order to build a Geospatial Web it is necessary that its architecture satisfies all the REST constraints. One of them is of particular importance: the adoption of a Uniform Interface. It prescribes that all the geospatial resources must be accessed through the same interface; moreover according to the REST style this interface must satisfy four further constraints: a) identification of resources; b) manipulation of resources through representations; c) self-descriptive messages; and, d) hypermedia as the engine of application state. In the Web, the uniform interface provides basic operations which are meaningful for generic resources. They typically implement the CRUD pattern (Create-Retrieve-Update-Delete) which demonstrated to be flexible and powerful in several general-purpose contexts (e.g. filesystem management, SQL for database management systems, etc.). Restricting the scope to a subset of resources it would be possible to identify other generic actions which are meaningful for all of them. For example for geospatial resources, subsetting, resampling, interpolation and coordinate reference systems transformations functionalities are candidate functionalities for a uniform interface. However an investigation is needed to clarify the semantics of those actions for different resources, and consequently if they can really ascend the role of generic interface operation. Concerning the point a), (identification of resources), it is required that every resource addressable in the Geospatial Web has its own identifier (e.g. a URI). This allows to implement citation and re-use of resources, simply providing the URI. OPeNDAP and KVP encodings of OGC data access services specifications might provide a basis for it. Concerning point b) (manipulation of resources through representations), the Geospatial Web pose

Mazzetti, Paolo; Nativi, Stefano

2010-05-01

62

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 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

63

Simple environmental sensor webs for classroom inquiry  

Science.gov (United States)

This paper describes a platform for inquiry-driven learning in environmental science at the secondary and undergraduate levels including preliminary results from two pilot sensor web-driven projects, in progress. The work presented here emphasizes - Documenting construction and use of the platform - Analysis of results over technology used - Open-ended iteration of the inquiry process Cognitive theory suggests that pedagogical modes of 'information-transfer' fall short as a means of building (arguably useful) problem solving and critical thinking skills in comparison with inquiry-driven modes. In view of limited classroom time and constraints such as standardized testing, sensor web-driven environmental inquiry faces a two-fold challenge: Minimize time-intrusion into the curriculum and make that time highly productive and valuable for students. The technology employed here is a wireless microcomputer network ruggedized for outdoor use, interfaces to simple environmental sensors, supplemental data from a low-cost meteorological station, and data recovery and analysis by means of a laptop PC. Target cost of the system (not including the PC) is 2000USD. The baseline study subject is watershed hydrology, with a corollary aim of "identifiying the doorways" into related subjects and story lines. The general plan of action proceeds in these steps: - Build and test the system - Students work with the system in the classroom - Students formulate a deployment plan - Instruments deployed, data acquired and formatted - Student analysis, hypothesis generation, research - Reiterate the previous three steps as possible Once this platform/program is established the idea is to expand to include personalized reflection and self- expression per the curriculum established by the River of Words non-profit organization. The second expansion idea is (per the eScience model) to facilitate Internet-based exchanges and equipment sharing with students located in other geographical regions and countries.

Fatland, D. R.

2007-12-01

64

Information architecture: Tools for cutting-edge Web developers  

Science.gov (United States)

In the last month, "Internet Resources," an ongoing, online publication of the Association of College and Research Libraries (ACRL), has offered this new annotated bibliography. "Information architecture: Tools for cutting-edge Web developers" reviews Internet resources dealing with Website navigation, labeling/ naming schemes, and Website structure.

65

Web Application’s Reliability Improvement Through Architectural Patterns  

Directory of Open Access Journals (Sweden)

Full Text Available Scalability and availability are two highly desirable attributes pertaining to reliability of a web application that renders state-of-the-art services to online users. In simple words scalability is the ability to grow, the ability to serve increased number of requests or clients. Building a scalable application with round the clock availability is a challenging problem in the light of ever increasing population of potential users. Dramatic increase in users to web application causes bursts of requests that put the application to acid test. On the other hand web application availability represents the degree of operational continuity. High availability and unlimited scalability are the two indispensable quality attributes a web application in the real word. These features bestow rich user experience as far as operational continuity and ability to handle growing workload are concerned. By taking server side measures it is possible to achieve these two desirable features. However, there is possibility to have architectural pattern along with underlying design patterns to promote these quality features of web application. In this paper we enhance our architectural pattern eXtensible Web Application Development Framework (XWADF that can leverage the quality of web application design as it result in highly scalable with high availability. As the application is designed in XWADF framework it promotes scalability assuming server side supports in terms of resources. The application also ensures availability as the design supports maintenance without letting the application down. The empirical results revealed that our architectural approach increases reliability of web applications significantly in terms of availability and scalability

Md Umar Khan

2014-07-01

66

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

2008-01-01

67

Sensor Webs as Virtual Data Systems for Earth Science  

Science.gov (United States)

The NASA Earth Science Technology Office established a 3-year Advanced Information Systems Technology (AIST) development program in late 2006 to explore the technical challenges associated with integrating sensors, sensor networks, data assimilation and modeling components into virtual data systems called "sensor webs". The AIST sensor web program was initiated in response to a renewed emphasis on the sensor web concepts. In 2004, NASA proposed an Earth science vision for a more robust Earth observing system, coupled with remote sensing data analysis tools and advances in Earth system models. The AIST program is conducting the research and developing components to explore the technology infrastructure that will enable the visionary goals. A working statement for a NASA Earth science sensor web vision is the following: 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. Sensor webs will be dynamically organized to collect data, extract information from it, accept input from other sensor / forecast / tasking systems, interact with the environment based on what they detect or are tasked to perform, and communicate observations and results in real time. The focus on sensor webs is to develop the technology and prototypes to demonstrate the evolving sensor web capabilities. There are 35 AIST projects ranging from 1 to 3 years in duration addressing various aspects of sensor webs involving space sensors such as Earth Observing-1, in situ sensor networks such as the southern California earthquake network, and various modeling and forecasting systems. Some of these projects build on proof-of-concept demonstrations of sensor web capabilities like the EO-1 rapid fire response initially implemented in 2003. Other projects simulate future sensor web configurations to evaluate the effectiveness of sensor-model interactions for producing improved science predictions. Still other projects are maturing technology to support autonomous operations, communications and system interoperability. This paper will highlight lessons learned by various projects during the first half of the AIST program. Several sensor web demonstrations have been implemented and resulting experience with evolving standards, such as the Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) among others, will be featured. The role of sensor webs in support of the intergovernmental Group on Earth Observations' Global Earth Observation System of Systems (GEOSS) will also be discussed. The GEOSS vision is a distributed system of systems that builds on international components to supply observing and processing systems that are, in the whole, comprehensive, coordinated and sustained. Sensor web prototypes are under development to demonstrate how remote sensing satellite data, in situ sensor networks and decision support systems collaborate in applications of interest to GEO, such as flood monitoring. Furthermore, the international Committee on Earth Observation Satellites (CEOS) has stepped up to the challenge to provide the space-based systems component for GEOSS. CEOS has proposed "virtual constellations" to address emerging data gaps in environmental monitoring, avoid overlap among observing systems, and make maximum use of existing space and ground assets. Exploratory applications that support the objectives of virtual constellations will also be discussed as a future role for sensor webs.

Moe, K. L.; Sherwood, R.

2008-05-01

68

An architecture for "Web Of Things" using SOCKS protocol based IPv6/IPv4 gatewaying for heterogeneous communication  

Digital Repository Infrastructure Vision for European Research (DRIVER)

"Web Of Things" evolved from "Internet Of Things". Lot of research has been done in designing architecture for "Web Of Things". Two main architectures are Smart gateway based architecture and embedded Web Server based architecture. These architectures address some of the basic and essential issues relating to Service Oriented Architecture for "Web Of Things". Taking into consideration the period of coexistence of IPv4 and IPv6 we propose an architecture using SOCKS protocol ...

Patnaikuni, P. Shrinivasan R.; Kulkarni, Raj B.

2011-01-01

69

Secure, Autonomous, Intelligent Controller for Integrating Distributed Sensor Webs  

Science.gov (United States)

This paper describes the infrastructure and protocols necessary to enable near-real-time commanding, access to space-based assets, and the secure interoperation between sensor webs owned and controlled by various entities. Select terrestrial and aeronautics-base sensor webs will be used to demonstrate time-critical interoperability between integrated, intelligent sensor webs both terrestrial and between terrestrial and space-based assets. For this work, a Secure, Autonomous, Intelligent Controller and knowledge generation unit is implemented using Virtual Mission Operation Center technology.

Ivancic, William D.

2007-01-01

70

A Hybrid Web Browser Architecture for Mobile Devices  

Directory of Open Access Journals (Sweden)

Full Text Available Web browsing on mobile networks is slow in comparison to wired or Wi-Fi networks. Particularly, the connection establishment phase including DNS lookups and TCP handshakes takes a long time on mobile networks due to its long round-trip latency. In this paper, we propose a novel web browser architecture that aims to improve mobile web browsing performance. Our approach delegates the connection establishment and HTTP header field delivery tasks to a dedicated proxy server located at the joint point between the WAN and mobile network. Since the traffic for the connection establishment and HTTP header fields delivery passes only through the WAN between the proxy and web servers, our approach significantly reduces both the number and size of packets on the mobile network. Our evaluation showed that the proposed scheme reduces the number of mobile network packets by up to 42% and, consequently, the average page loading time is shortened by up to 52%.

CHO, J.

2014-08-01

71

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

2003-02-01

72

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

2011-08-01

73

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

2011-08-01

74

Technology System Architecture for Web–Based Education  

Directory of Open Access Journals (Sweden)

Full Text Available 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 employs 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.

A. Canales–Cruz

2009-04-01

75

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

76

Web Service Architecture for a Meta Search Engine  

Directory of Open Access Journals (Sweden)

Full Text Available With the rapid advancements in Information Technology, Information Retrieval on Internet is gaining its importance day by day. Nowadays there are millions of Websites and billions of homepages available on the Internet. Search Engines are the essential tools for the purpose of retrieving the required information from the Web. But the existing search engines have many problems such as not having wide scope, imbalance in accessing the sites etc. So, the effectiveness of a search engine plays a vital role. Meta search engines are such systems that can provide effective information by accessing multiple existing search engines such as Dog Pile, Meta Crawler etc, but most of them cannot successfully operate on heterogeneous and fully dynamic web environment. In this paper we propose a Web Service Architecture for Meta Search Engine to cater the need of heterogeneous and dynamic web environment. The objective of our proposal is to exploit most of the features offered by Web Services through the implementation of a Web Service Meta Search Engine.

K.Srinivas

2011-10-01

77

Sensor Web and Intelligent Sensors for Earth Science Applications  

Science.gov (United States)

There is a significant interest in the Earth Science remote sensing community in substantially increasing the number of observations relative to the current frequency of collection. The obvious reason for such a push is to improve the temporal and surface coverage of measurements. However, there is little analysis available in terms of benefits, costs and optimized set of sensors needed to make these necessary observations. This is a complex problem that should be carefully studied and balanced over many boundaries. For example, the question of technology maturity versus users' desire for obtaining additional measurements is noncongruent. This is further complicated by the limitations of the laws of physics and the economic conditions. With the advent of advanced technology, it is anticipated that developments in spacecraft technology will enable advanced capabilities to become more affordable. However, specialized detector subsystems, and precision flying techniques may still require substantial innovation, development time and cost. Additionally, the space deployment scheme should also be given careful attention because of the high associated expense. Nonetheless, it is important to carefully examine the science priorities and steer the development efforts that can commensurate with the tangible requirements. This presentation will focus on a possible set of architectural concepts beneficial for future Earth science studies and research its and potential benefits.

Habib, Shahid

2002-01-01

78

A signal processing architecture for high throughput sensor processing  

Science.gov (United States)

This paper summarizes a study performed to derive sensor signal processing requirements, and to design a signal processing architecture capable of performing all of the required signal processing. General conclusions are that the processing close to the sensor requires very high throughput but is well structured, requires limited flexibility, and may be parameter programmed. An architecture with high throughput front-end processors followed by programmable processors meets all signal processing requirements and tends to simplify the structure. The front-end processors benefit significantly from high-throughput VLSI chips designed for this purpose. The Complex Multiply and Accumulate (CMAC) chip exemplifies such a design. It is capable of performing 100 million multiplies per second, and is designed to efficiently implement some of the common signal processing algorithms. The architecture allows multiple CMACs to be configured into an array capable of over a billion multiplies per second. This architecture and chip are to be initially demonstrated against an avionic antisubmarine warfare requirement.

Lee, W. H.; Osborne, W. H.; Johnson, P. B.

79

ARPENTEUR: a web-based photogrammetry tool for architectural modeling  

Science.gov (United States)

ARPENTEUR is a web application for digital 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 laboratory and the MAP-gamsau CNRS laboratory located in the school of Architecture of Marseille. The software package is a web based tool since photogrammetric concepts are embedded in Web technology and Java programming language. The aim of this project is to propose a photogrammetric software package and 3D modeling methods available on the Internet as applets through a simple browser. The use of Java and the Web platform is ful of advantages. Distributing software on any platform, at any pace connected to Internet is of course very promising. The updating is done directly on the server and the user always works with the latest release installed on the server. Three years ago the first prototype of ARPENTEUR was based on the Java Development Kit at the time only available for some browsers. Nowadays, we are working with the JDK 1.3 plug-in enriched by Java Advancing Imaging library.

Grussenmeyer, Pierre; Drap, Pierre

2000-12-01

80

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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...

Ulltveit-moe, Nils; Olsen, Morten Goodwin; Pillai, Anand B.; Thomsen, Christian; Gjøsæter, Terje; Snaprud, Mikael

2008-01-01

 
 
 
 
81

Use of the Earth Observing One (EO-1) Satellite for the Namibia SensorWeb Flood Early Warning Pilot  

Science.gov (United States)

The Earth Observing One (EO-1) satellite was launched in November 2000 as a one year technology demonstration mission for a variety of space technologies. After the first year, it was used as a pathfinder for the creation of SensorWebs. A SensorWeb is the integration of variety of space, airborne and ground sensors into a loosely coupled collaborative sensor system that automatically provides useful data products. Typically, a SensorWeb is comprised of heterogeneous sensors tied together with a messaging architecture and web services. Disasters are the perfect arena to use SensorWebs. One SensorWeb pilot project that has been active since 2009 is the Namibia Early Flood Warning SensorWeb pilot project. The Pilot Project was established under the auspices of the Namibian Ministry of Agriculture Water and Forestry (MAWF)/Department of Water Affairs, the Committee on Earth Observing Satellites (CEOS)/Working Group on Information Systems and Services (WGISS) and moderated by the United Nations Platform for Space-based Information for Disaster Management and Emergency Response (UN-SPIDER). The effort began by identifying and prototyping technologies which enabled the rapid gathering and dissemination of both space-based and ground sensor data and data products for the purpose of flood disaster management and water-borne disease management. This was followed by an international collaboration to build small portions of the identified system which was prototyped during that past few years during the flood seasons which occurred in the February through May timeframe of 2010 and 2011 with further prototyping to occur in 2012. The SensorWeb system features EO-1 data along with other data sets from such satellites as Radarsat, Terra and Aqua. Finally, the SensorWeb team also began to examine the socioeconomic component to determine the impact of the SensorWeb technology and how best to assist in the infusion of this technology in lesser affluent areas with low levels of basic infrastructure. This paper provides an overview of these efforts, highlighting the EO-1 usage in this SensorWeb.

Mandl, Daniel; Frye, Stuart; Cappelaere, Pat; Handy, Matthew; Policelli, Fritz; Katjizeu, McCloud; Van Langenhove, Guido; Aube, Guy; Saulnier, Jean-Francois; Sohlberg, Rob; Silva, Julie; Kussul, Nataliia; Skakun, Sergii; Ungar, Stephen; Grossman, Robert

2012-01-01

82

Lessons Learned from Web-Enhanced Teaching in Landscape Architecture Studios  

Science.gov (United States)

The purpose of this article was to summarize lessons learned from implementing web-enhanced teaching in landscape architecture studio courses. The lessons are documented as challenges and opportunities based on a two-year assessment study of web-enhanced landscape architecture construction studios. This article will help landscape architecture

Li, Ming-Han

2007-01-01

83

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

2011-01-01

84

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

Science.gov (United States)

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. PMID:23955435

Stoimenov, Leonid; Bogdanovic, Milos; Bogdanovic-Dinic, Sanja

2013-01-01

85

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.

Milos Bogdanovic

2013-08-01

86

ESB-based Sensor Web integration for the prediction of electric power supply system vulnerability.  

Science.gov (United States)

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. PMID:23955435

Stoimenov, Leonid; Bogdanovic, Milos; Bogdanovic-Dinic, Sanja

2013-01-01

87

A HIERARCHICAL INTRUSION DETECTION ARCHITECTURE FOR WIRELESS SENSOR NETWORKS  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 d...

Hossein Jadidoleslamy

2011-01-01

88

Architecture and Methods for Innovative Heterogeneous Wireless Sensor Network Applications  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 f...

Pedro Antonio; Francesco Grimaccia; Marco Mussetta

2012-01-01

89

A multi-agent system architecture for sensor networks.  

Science.gov (United States)

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. PMID:22303172

Fuentes-Fernández, Rubén; Guijarro, María; Pajares, Gonzalo

2009-01-01

90

Design of Real-time Communication Adapter for Different Protocol Sensors in Sensor Web  

Directory of Open Access Journals (Sweden)

Full Text Available A real-time communication adapter named SensorAdapter is designed to communicate between different protocols sensors and data service layer in Sensor Web. The adapter is extended and restructured based on SensorBus, an open source project raised by a German company called 52north. By structuring the receiving module and extending the proxies of sensors according to the communication protocols the sensors use, the adapter can receive sensing information detected by different protocols sensors simultaneously. The receiving module identifies a sensor and finds its corresponding proxy in SensorAdapter by sensor ID (SensorID, and then packages the sensing information to XMPP messages and sends them to XMPPServer by invoking the methods in its proxy. At last, an example of SOS is achieved to verify the effect of the adapter.

Longlong Lu

2012-09-01

91

Establishing the Global Fresh Water Sensor Web  

Science.gov (United States)

This paper presents an approach to measuring the major components of the water cycle from space using the concept of a sensor-web of satellites that are linked to a data assimilation system. This topic is of increasing importance, due to the need for fresh water to support the growing human population, coupled with climate variability and change. The net effect is that water is an increasingly valuable commodity. The distribution of fresh water is highly uneven over the Earth, with both strong latitudinal distributions due to the atmospheric general circulation, and even larger variability due to landforms and the interaction of land with global weather systems. The annual global fresh water budget is largely a balance between evaporation, atmospheric transport, precipitation and runoff. Although the available volume of fresh water on land is small, the short residence time of water in these fresh water reservoirs causes the flux of fresh water - through evaporation, atmospheric transport, precipitation and runoff - to be large. With a total atmospheric water store of approx. 13 x 10(exp 12)cu m, and an annual flux of approx. 460 x 10(exp 12)cu m/y, the mean atmospheric residence time of water is approx. 10 days. River residence times are similar, biological are approx. 1 week, soil moisture is approx. 2 months, and lakes and aquifers are highly variable, extending from weeks to years. The hypothesized potential for redistribution and acceleration of the global hydrological cycle is therefore of concern. This hypothesized speed-up - thought to be associated with global warming - adds to the pressure placed upon water resources by the burgeoning human population, the variability of weather and climate, and concerns about anthropogenic impacts on global fresh water availability.

Hildebrand, Peter H.

2005-01-01

92

SSWAP: A Simple Semantic Web Architecture and Protocol for semantic web services  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract Background SSWAP (Simple Semantic Web Architecture and Protocol; pronounced "swap" is an architecture, protocol, and platform for using reasoning to semantically integrate heterogeneous disparate data and services on the web. SSWAP was developed as a hybrid semantic web services technology to overcome limitations found in both pure web service technologies and pure semantic web technologies. Results There are currently over 2400 resources published in SSWAP. Approximately two dozen are custom-written services for QTL (Quantitative Trait Loci and mapping data for legumes and grasses (grains. The remaining are wrappers to Nucleic Acids Research Database and Web Server entries. As an architecture, SSWAP establishes how clients (users of data, services, and ontologies, providers (suppliers of data, services, and ontologies, and discovery servers (semantic search engines interact to allow for the description, querying, discovery, invocation, and response of semantic web services. As a protocol, SSWAP provides the vocabulary and semantics to allow clients, providers, and discovery servers to engage in semantic web services. The protocol is based on the W3C-sanctioned first-order description logic language OWL DL. As an open source platform, a discovery server running at http://sswap.info (as in to "swap info" uses the description logic reasoner Pellet to integrate semantic resources. The platform hosts an interactive guide to the protocol at http://sswap.info/protocol.jsp, developer tools at http://sswap.info/developer.jsp, and a portal to third-party ontologies at http://sswapmeet.sswap.info (a "swap meet". Conclusion SSWAP addresses the three basic requirements of a semantic web services architecture (i.e., a common syntax, shared semantic, and semantic discovery while addressing three technology limitations common in distributed service systems: i.e., i the fatal mutability of traditional interfaces, ii the rigidity and fragility of static subsumption hierarchies, and iii the confounding of content, structure, and presentation. SSWAP is novel by establishing the concept of a canonical yet mutable OWL DL graph that allows data and service providers to describe their resources, to allow discovery servers to offer semantically rich search engines, to allow clients to discover and invoke those resources, and to allow providers to respond with semantically tagged data. SSWAP allows for a mix-and-match of terms from both new and legacy third-party ontologies in these graphs.

Town Christopher D

2009-09-01

93

a Web Service Approach for Linking Sensors and Cellular Spaces  

Science.gov (United States)

More and more devices are starting to be connected to the Internet. In the future the Internet will not only be a communication medium for people, it will in fact be a communication environment for devices. The connected devices which are also referred as Things will have an ability to interact with other devices over the Internet, i.) provide information in interoperable form and ii.) consume /utilize such information with the help of sensors embedded in them. This overall concept is known as Internet-of- Things (IoT). This requires new approaches to be investigated for system architectures to establish relations between spaces and sensors. The research presented in this paper elaborates on an architecture developed with this aim, i.e. linking spaces and sensors using a RESTful approach. The objective is making spaces aware of (sensor-embedded) devices, and making devices aware of spaces in a loosely coupled way (i.e. a state/usage/function change in the spaces would not have effect on sensors, similarly a location/state/usage/function change in sensors would not have any effect on spaces). The proposed architecture also enables the automatic assignment of sensors to spaces depending on space geometry and sensor location.

Isikdag, U.

2013-09-01

94

A Survey of Wireless Sensor Network Architectures  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ...

Almir Davis; Hwa Chang

2013-01-01

95

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

96

ME: Multimodal Environment Based on Web Services Architecture  

Science.gov (United States)

Information, documents and knowledge for each person and for public and private organizations are fundamental in each activity, and they may be the products or services they provide or supply. The daily activities and decision-making processes are usually based on many different pieces of information, which could be handled on PDAs and mobile devices in general, or stored on laptop computers using a lot of different forms, such as spreadsheets, e-mail messages, Web information obtained as the result of a Google search or a query, and so on. Simulating and managing services and information in catastrophic events and emergencies does not represent an exception. This paper describes the Web Services architecture of the Multimodal collaborative knowledge oriented Environment (ME), a platform designed to manage data, information and services for catastrophic events such as earthquakes, floods and dangerous natural phenomena.

Chiara Caschera, Maria; D'Andrea, Alessia; D'Ulizia, Arianna; Ferri, Fernando; Grifoni, Patrizia; Guzzo, Tiziana

97

OPENSOURCE WEB ARCHITECTURE FOR THE DEVELOPMENT OF MULTIPLAYER GAMES  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The development of multiplayer web-based games is still complex, even though a large number of tools for developing HTML5 games exist. In a multiplayer game, developers have to create two separate applications, one for the server and one for the client. They also have to implement two-way communication between the client and the server and keep all the clients and the server in sync. We developed a platform for the development of multiplayer games based on a proposed architecture called Chill...

Pelc, Taj

2013-01-01

98

Geocoding Sensor Data – Applying OGC’s Sensor Web Enablement Specifications  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The Open Geospatial Consortium (OGC) addresses the requirement of integrating sensor information into spatial information infrastructures by developing service interfaces, protocols and data types in the Sensor Web Enablement (SWE) specification series. Using web-based services as tools for interdisciplinary data exchange, as well as for the extensive usage of heterogeneous data resources is an important step towards addressing today’s larger scale environmental problems (Bacharach, 2008). ...

 walter, K.

2010-01-01

99

Video surveillance for sensor platforms algorithms and architectures  

CERN Document Server

This book introduces resource aware image decomposition, registration, fusion, object detection and tracking algorithms along with their applications in security, monitoring and integration in 3rd Generation Surveillance Systems.  All algorithms are evaluated through experimental and simulation results and a parallel and pipelined efficient architecture for implementing the algorithms is described. • Describes a new type of image processing algorithms that are suited for low power and low memory platforms such as wireless sensor networks or mobile devices; • Uses simulation and experimental results to evaluate algorithms presented; • Includes hardware architecture for critical components in the algorithms described.

Al Najjar, Mayssaa; Bayoumi, Magdy

2014-01-01

100

Hybrid Exploration Agent Platform and Sensor Web System  

Science.gov (United States)

A sensor web to collect the scientific data needed to further exploration is a major and efficient asset to any exploration effort. This is true not only for lunar and planetary environments, but also for interplanetary and liquid environments. Such a system would also have myriad direct commercial spin-off applications. The Hybrid Exploration Agent Platform and Sensor Web or HEAP-SW like the ANTS concept is a Sensor Web concept. The HEAP-SW is conceptually and practically a very different system. HEAP-SW is applicable to any environment and a huge range of exploration tasks. It is a very robust, low cost, high return, solution to a complex problem. All of the technology for initial development and implementation is currently available. The HEAP Sensor Web or HEAP-SW consists of three major parts, The Hybrid Exploration Agent Platforms or HEAP, the Sensor Web or SW and the immobile Data collection and Uplink units or DU. The HEAP-SW as a whole will refer to any group of mobile agents or robots where each robot is a mobile data collection unit that spends most of its time acting in concert with all other robots, DUs in the web, and the HEAP-SWs overall Command and Control (CC) system. Each DU and robot is, however, capable of acting independently. The three parts of the HEAP-SW system are discussed in this paper. The Goals of the HEAP-SW system are: 1) To maximize the amount of exploration enhancing science data collected; 2) To minimize data loss due to system malfunctions; 3) To minimize or, possibly, eliminate the risk of total system failure; 4) To minimize the size, weight, and power requirements of each HEAP robot; 5) To minimize HEAP-SW system costs. The rest of this paper discusses how these goals are attained.

Stoffel, A. William; VanSteenberg, Michael E.

2004-01-01

 
 
 
 
101

Software Architecture of Sensor Data Distribution In Planetary Exploration  

Science.gov (United States)

Data from mobile and stationary sensors will be vital in planetary surface exploration. The distribution and collection of sensor data in an ad-hoc wireless network presents a challenge. Irregular terrain, mobile nodes, new associations with access points and repeaters with stronger signals as the network reconfigures to adapt to new conditions, signal fade and hardware failures can cause: a) Data errors; b) Out of sequence packets; c) Duplicate packets; and d) Drop out periods (when node is not connected). To mitigate the effects of these impairments, a robust and reliable software architecture must be implemented. This architecture must also be tolerant of communications outages. This paper describes such a robust and reliable software infrastructure that meets the challenges of a distributed ad hoc network in a difficult environment and presents the results of actual field experiments testing the principles and actual code developed.

Lee, Charles; Alena, Richard; Stone, Thom; Ossenfort, John; Walker, Ed; Notario, Hugo

2006-01-01

102

Architecture design for Large-scale Wireless Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This thesis considers the large-scale wireless sensor network (LSWSN) consisting of million nodes. The questions are: how to predict the good working and to compute before deployment the performances of such a network, knowing that no simulator can simulate a network of more than 100000 nodes? How to ensure its configuration to ensure performance, scalability, robustness and longevity? The solution proposed in this thesis is based on a two-tiered heterogeneous architecture of WSN in which the...

Kone, Cheick-tidjane

2011-01-01

103

A Security Architecture for Grid-enabling OGC Web Services  

Science.gov (United States)

In the proposed presentation we describe an architectural solution for enabling a secure access to Grids and possibly other large scale on-demand processing infrastructures through OGC (Open Geospatial Consortium) Web Services (OWS). This work has been carried out in the context of the security thread of the G-OWS Working Group. G-OWS (gLite enablement of OGC Web Services) is an international open initiative started in 2008 by the European CYCLOPS , GENESI-DR, and DORII Project Consortia in order to collect/coordinate experiences in the enablement of OWS's on top of the gLite Grid middleware. G-OWS investigates the problem of the development of Spatial Data and Information Infrastructures (SDI and SII) based on the Grid/Cloud capacity in order to enable Earth Science applications and tools. Concerning security issues, the integration of OWS compliant infrastructures and gLite Grids needs to address relevant challenges, due to their respective design principles. In fact OWS's are part of a Web based architecture that demands security aspects to other specifications, whereas the gLite middleware implements the Grid paradigm with a strong security model (the gLite Grid Security Infrastructure: GSI). In our work we propose a Security Architectural Framework allowing the seamless use of Grid-enabled OGC Web Services through the federation of existing security systems (mostly web based) with the gLite GSI. This is made possible mediating between different security realms, whose mutual trust is established in advance during the deployment of the system itself. Our architecture is composed of three different security tiers: the user's security system, a specific G-OWS security system, and the gLite Grid Security Infrastructure. Applying the separation-of-concerns principle, each of these tiers is responsible for controlling the access to a well-defined resource set, respectively: the user's organization resources, the geospatial resources and services, and the Grid resources. While the gLite middleware is tied to a consolidated security approach based on X.509 certificates, our system is able to support different kinds of user's security infrastructures. Our central component, the G-OWS Security Framework, is based on the OASIS WS-Trust specifications and on the OGC GeoRM architectural framework. This allows to satisfy advanced requirements such as the enforcement of specific geospatial policies and complex secure web service chained requests. The typical use case is represented by a scientist belonging to a given organization who issues a request to a G-OWS Grid-enabled Web Service. The system initially asks the user to authenticate to his/her organization's security system and, after verification of the user's security credentials, it translates the user's digital identity into a G-OWS identity. This identity is linked to a set of attributes describing the user's access rights to the G-OWS services and resources. Inside the G-OWS Security system, access restrictions are applied making use of the enhanced Geospatial capabilities specified by the OGC GeoXACML. If the required action needs to make use of the Grid environment the system checks if the user is entitled to access a Grid infrastructure. In that case his/her identity is translated to a temporary Grid security token using the Short Lived Credential Services (IGTF Standard). In our case, for the specific gLite Grid infrastructure, some information (VOMS Attributes) is plugged into the Grid Security Token to grant the access to the user's Virtual Organization Grid resources. The resulting token is used to submit the request to the Grid and also by the various gLite middleware elements to verify the user's grants. Basing on the presented framework, the G-OWS Security Working Group developed a prototype, enabling the execution of OGC Web Services on the EGEE Production Grid through the federation with a Shibboleth based security infrastructure. Future plans aim to integrate other Web authentication services such as OpenID, Kerberos and WS-Federation.

Angelini, Valerio; Petronzio, Luca

2010-05-01

104

ARPENTEUR:A WEB-BASED PHOTOGRAMMETRY TOOL FOR
ARCHITECTURAL 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 laboratory (Strasbourg, France) and the MAP-gamsau CNRS laboratory located in the school of Architecture of Marseille (France). The software package is a Web based tool since photogrammetric conce...

Drap, Pierre; Grussenmeyer, Pierre

2001-01-01

105

Embedded Web Server for Wireless Sensor Network in Industrial Applications  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract:The Embedded Web Server design primarily aims at incorporating intelligent electronics systems in Industrial field control. There are numerous parameters that are required to be monitored and controlled in an industrial setup and in the current scenario data transmission systems are thoroughly dependent upon wired transmissions. In this paper a cost effective model of embedded server is proposed which can replace wired transmission of information, in various industrial set ups such are cement industry, material handling industry etc which are heavily suffering from the dependability problems. In this work Wireless Sensor Network model is established which serves as the ?Sensor node?. This sensor node acquires data wirelessly and transmits to the Low cost Server that acts as the data host for the intercepted information. Designed Server adopts the concept of data hosting on web, and therefore has the capability of carrying out the various functionalities of a server.

MOHAMMED ISMAIL.B, AAQUIB JUNAID, SHIBASHISH BANERJEE, MD. ABDUL JABBAR

2013-08-01

106

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ene...

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

2013-01-01

107

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

108

DSP Architecture for Wireless Sensor Nodes Using VLSI Technique  

Directory of Open Access Journals (Sweden)

Full Text Available Radio communication exhibits the highest energy consumption in wireless sensor nodes. Given their limited energy supply from batteries or scavenging, these nodes must trade data communication for on-the-node computation. Currently, they are designed around off-the-shelf low-power microcontrollers. But by employing a more appropriate processing element, the energy consumption can be significantly reduced. This paper describes the design and implementation of the newly proposed folded-tree architecture for on-the-node data processing in wireless sensor networks, using parallel prefix operations and data locality in hardware. Measurements of the silicon implementation show an improvement of 10–20× in terms of energy as compared to traditional modern micro-controllers found in sensor nodes.

R.Ragumadhavan

2014-02-01

109

A Web Services based Approach for Resource-Constrained Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available The large diffusion of Wireless Sensor Networks (WSNs in our contemporary life with their numerous applications has led to a huge heterogeneity. This heterogeneity makes the possibility of discovering and collecting data from the wireless sensors more and more difficult. Indeed, WSNs are currently developed around different communities of sensor and user types, with each community typically relying on its own system, metadata semantics, data format and software. Therefore, the ability to discover and utilize a new sensor asset is typically hindered by incompatible services and encodings which can cause interoperability between different sensor nodes within the same WSN. Service-Oriented-Architecture (SOA is one of the key paradigms that enables the deployment of services at large-scale over the Internet domain and its integration with WSNs could open new pathways for novel applications and research. Despite the need to integrate SOA with WSNs, only handful efforts are underway to achieve the goal. In this paper, we tackle integration of SOA with WSNs by proposing a Lightweight Representational State Transfer (REST-based Web Services approach to treat sensors in an interoperable, platform-independent and uniform way.

Sana Baccar

2012-05-01

110

Architecture for Improving Terrestrial Logistics Based on the Web of Things  

Directory of Open Access Journals (Sweden)

Full Text Available Technological advances for improving supply chain efficiency present three key challenges for managing goods: tracking, tracing and monitoring (TTM, in order to satisfy the requirements for products such as perishable goods where the European Legislations requires them to ship within a prescribed temperature range to ensure freshness and suitability for consumption. The proposed system integrates RFID for tracking and tracing through a distributed architecture developed for heavy goods vehicles, and the sensors embedded in the SunSPOT platform for monitoring the goods transported based on the concept of the Internet of Things. This paper presents how the Internet of Things is integrated for improving terrestrial logistics offering a comprehensive and flexible architecture, with high scalability, according to the specific needs for reaching an item-level continuous monitoring solution. The major contribution from this work is the optimization of the Embedded Web Services based on RESTful (Web of Things for the access to TTM services at any time during the transportation of goods. Specifically, it has been extended the monitoring patterns such as observe and blockwise transfer for the requirements from the continuous conditional monitoring, and for the transfer of full inventories and partial ones based on conditional queries. In definitive, this work presents an evolution of the previous TTM solutions, which were limited to trailer identification and environment monitoring, to a solution which is able to provide an exhaustive item-level monitoring, required for several use cases. This exhaustive monitoring has required new communication capabilities through the Web of Things, which has been optimized with the use and improvement of a set of communications patterns.

Antonio Skarmeta

2012-05-01

111

Architecture for service-oriented WebGIS in the mode of multilevel multilayer organizing  

Science.gov (United States)

Service-oriented WebGIS is becoming a new trend of WebGIS. Under this schema, GIS data and operations are enveloped into self-organized as well as self-described GIS web services. Via flexibly assembling theses web services, GIS applications can be designed and implemented. Based on such, the bottleneck in spatial data sharing and GIS operations can be widened to a certain extent. In this article, architecture for service-oriented WebGIS in the mode of Multilevel-multilayer Organizing was focused on, and the hierarchical architecture for GIS web services, multi-level query for GIS Web services as well as functions of intelligent manager were presented and demonstrating. In a case study, a land use planning management information system for Yubei district, Chongqing city, had been developed based on web service technique to demonstrate proposed feasibility.

Li, Feixue; Li, Manchun; Liang, Jian

2007-06-01

112

Distributed event-driven architectures for evolutionary sensor fusion  

Science.gov (United States)

The next decade will require the development of complex sensor systems that integrate data from a large number of sensor elements. Such systems will play important roles in a wide variety of industrial and defense systems, as the fusion of multiple sources of information is crucial to sensor operation in noisy environments, and in complex decision making. The arrival of ubiquitous processing elements is one requirement for the development of such systems; however, the ability to connect and integrate these elements at the logical level is the more limiting aspect of their development. Furthermore, it is unlikely that such systems can be developed in a single linear process. It is much more probable that such systems will need to be evolved over time, perhaps a substantial period of time, and as result the ability to logically interconnect heterogeneous elements in an evolutionary manner will be of great importance. This paper outlines some approaches to this problem based on the distributed object-computing model as introduced in the OMG CORBA. It is our belief that this technology is maturing to the point that it could form the foundations for a sensor architecture that would support the evolutionary development of complex sensor networks.

Lake, Ron T.

1998-03-01

113

OpenAlea 2.0: Architecture of an integrated modeling environment on the web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Plant modeling is based on the use of a diverse set of design paradigms (L-systems, visual programming, imperative languages or sketch-based interfaces). In this poster, the architecture of a new multi-paradigm and integrated modeling environment is presented. This desktop application will become a distributed web application, allowing to run simulations on a cloud computing system and share virtual experiments on the web. The modeling environment will run on a web browser using HTML5 and Web...

Pradal, Christophe; Coste, Julien; Boudon, Fre?de?ric; Fournier, Christian; Godin, Christophe

2013-01-01

114

An Observation Capability Metadata Model for EO Sensor Discovery in Sensor Web Enablement Environments  

Directory of Open Access Journals (Sweden)

Full Text Available Accurate and fine-grained discovery by diverse Earth observation (EO sensors ensures a comprehensive response to collaborative observation-required emergency tasks. This discovery remains a challenge in an EO sensor web environment. In this study, we propose an EO sensor observation capability metadata model that reuses and extends the existing sensor observation-related metadata standards to enable the accurate and fine-grained discovery of EO sensors. The proposed model is composed of five sub-modules, namely, ObservationBreadth, ObservationDepth, ObservationFrequency, ObservationQuality and ObservationData. The model is applied to different types of EO sensors and is formalized by the Open Geospatial Consortium Sensor Model Language 1.0. The GeosensorQuery prototype retrieves the qualified EO sensors based on the provided geo-event. An actual application to flood emergency observation in the Yangtze River Basin in China is conducted, and the results indicate that sensor inquiry can accurately achieve fine-grained discovery of qualified EO sensors and obtain enriched observation capability information. In summary, the proposed model enables an efficient encoding system that ensures minimum unification to represent the observation capabilities of EO sensors. The model functions as a foundation for the efficient discovery of EO sensors. In addition, the definition and development of this proposed EO sensor observation capability metadata model is a helpful step in extending the Sensor Model Language (SensorML 2.0 Profile for the description of the observation capabilities of EO sensors.

Chuli Hu

2014-10-01

115

Sensor architectural tradeoff for diabetic foot ulcer monitoring.  

Science.gov (United States)

The diabetic foot complications constitute a tremendous challenge for patients, caregivers, and the healthcare system. Studies show up to 25% of diabetic individuals will develop a foot ulcer during their lifetime and many of these patients eventually must undergo amputation as a result of infection due to untreated foot ulcers. With current technology, in-shoe monitoring systems can be implemented to continuously monitor at-risk ulceration sites based on known indicators such as peak pressure. The important parameters in designing a pressure-sensing insole include the number, location and size of sensors. In this paper, we aim at showing the criticality of sensor architectural tradeoff in developing the in-shoe plantar pressure monitoring systems. We evaluate this tradeoff by using our custom-made platform for data collection during normal walking. PMID:23367463

Ostadabbas, Sarah; Saeed, Adnan; Nourani, Mehrdad; Pompeo, Matthew

2012-01-01

116

“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

2012-09-01

117

Service Oriented Architecture A Revolution For Comprehensive Web Based Project Management Software  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Service Oriented Architecture A Revolution for Project Management Software has changed the way projects today are moving on the fly with the help of web services booming the industry. Service oriented architecture improves performance and the communication between the distributed and remote teams. Web Services to Provide Project Management software the visibility and control of the application development lifecycle-giving a better control over the entire development process,...

Khan, Ahmad Raza; Khan, Rquaiya; Sontakke, Trimbak R.; Khonde, Shraddha R.; Wahul, Revati; Alam, Mahtab

2012-01-01

118

WEB-ENABLED GENERALIZED ARCHITECTURAL MODEL FOR ONLINE POWER SYSTEM ANALYSIS  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In this study, an effective Web-enabled generalized architectural model is proposed. The proposed model makes the power system analysis to be completely secured, distributed, platform-independent and language-independent. Although significant progress has been made for on-line power system analysis in distributed environment, still efficient distributed environment has not yet been exploited. The Web-enabled architectural models are emerging as basic methodologies to support the integration o...

Sengodan, Boopathi C.; Subhransu Sekhar Dash; Subramani Chinnamuthu; Ramadoss Ramesh; Sudakaran Mahalingam

2013-01-01

119

Development of a Dynamic Web Mapping Service for Vegetation Productivity Using Earth Observation and in situ Sensors in a Sensor Web Based Approach  

Directory of Open Access Journals (Sweden)

Full Text Available This paper describes the development of a sensor web based approach which combines earth observation and in situ sensor data to derive typical information offered by a dynamic web mapping service (WMS. A prototype has been developed which provides daily maps of vegetation productivity for the Netherlands with a spatial resolution of 250 m. Daily available MODIS surface reflectance products and meteorological parameters obtained through a Sensor Observation Service (SOS were used as input for a vegetation productivity model. This paper presents the vegetation productivity model, the sensor data sources and the implementation of the automated processing facility. Finally, an evaluation is made of the opportunities and limitations of sensor web based approaches for the development of web services which combine both satellite and in situ sensor sources.

Sytze de Bruin

2009-03-01

120

An architecture for "Web Of Things" using SOCKS protocol based IPv6/IPv4 gatewaying for heterogeneous communication  

CERN Document Server

"Web Of Things" evolved from "Internet Of Things". Lot of research has been done in designing architecture for "Web Of Things". Two main architectures are Smart gateway based architecture and embedded Web Server based architecture. These architectures address some of the basic and essential issues relating to Service Oriented Architecture for "Web Of Things". Taking into consideration the period of coexistence of IPv4 and IPv6 we propose an architecture using SOCKS protocol based IPv6/IPv4 gatewaying and refinements which facilitates smooth heterogeneous communications between the IPv6 and IPv4 enabled embedded nodes and can potentially be used to prevent security threats like Denial-of-Service (DoS) attacks on embedded devices attached to the web and increase its performance. Our architecture provides a way for caching responses from device and thereby increasing its efficiency and performance and yielding quick response times.

Patnaikuni, P Shrinivasan R

2011-01-01

 
 
 
 
121

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

122

The application of service oriented architecture in calculation of thermochemical properties in web service form  

Directory of Open Access Journals (Sweden)

Full Text Available The paper is devoted to application of service oriented architecture in calculation of thermochemical properties. It describesfor this purpose designed web service, its features and possibilities of utilization as well as basic principles of service orientedarchitecture that are used in web service design. As basic data sources were used NASA polynomials, CAS registry numberand manually filled data. Web service has 23 particular functions, which is possible to use in various clients environments.

Pavel Horov?ák

2012-12-01

123

Development of Integration Framework for Sensor Network and Satellite Image based on OGC Web Services  

Science.gov (United States)

With the availability of network enabled sensing devices, the volume of information being collected by networked sensors has increased dramatically in recent years. Over 100 physical, chemical and biological properties can be sensed using in-situ or remote sensing technology. A collection of these sensor nodes forms a sensor network, which is easily deployable to provide a high degree of visibility into real-world physical processes as events unfold. The sensor observation network could allow gathering of diverse types of data at greater spatial and temporal resolution, through the use of wired or wireless network infrastructure, thus real-time or near-real time data from sensor observation network allow researchers and decision-makers to respond speedily to events. However, in the case of environmental monitoring, only a capability to acquire in-situ data periodically is not sufficient but also the management and proper utilization of data also need to be careful consideration. It requires the implementation of database and IT solutions that are robust, scalable and able to interoperate between difference and distributed stakeholders to provide lucid, timely and accurate update to researchers, planners and citizens. The GEO (Global Earth Observation) Grid is primarily aiming at providing an e-Science infrastructure for the earth science community. The GEO Grid is designed to integrate various kinds of data related to the earth observation using the grid technology, which is developed for sharing data, storage, and computational powers of high performance computing, and is accessible as a set of services. A comprehensive web-based system for integrating field sensor and data satellite image based on various open standards of OGC (Open Geospatial Consortium) specifications has been developed. Web Processing Service (WPS), which is most likely the future direction of Web-GIS, performs the computation of spatial data from distributed data sources and returns the outcome in a standard format. The interoperability capabilities and Service Oriented Architecture (SOA) of web services allow incorporating between sensor network measurement available from Sensor Observation Service (SOS) and satellite remote sensing data from Web Mapping Service (WMS) as distributed data sources for WPS. Various applications have been developed to demonstrate the efficacy of integrating heterogeneous data source. For example, the validation of the MODIS aerosol products (MOD08_D3, the Level-3 MODIS Atmosphere Daily Global Product) by ground-based measurements using the sunphotometer (skyradiometer, Prede POM-02) installed at Phenological Eyes Network (PEN) sites in Japan. Furthermore, the web-based framework system for studying a relationship between calculated Vegetation Index from MODIS satellite image surface reflectance (MOD09GA, the Surface Reflectance Daily L2G Global 1km and 500m Product) and Gross Primary Production (GPP) field measurement at flux tower site in Thailand and Japan has been also developed. The success of both applications will contribute to maximize data utilization and improve accuracy of information by validate MODIS satellite products using high degree of accuracy and temporal measurement of field measurement data.

Ninsawat, Sarawut; Yamamoto, Hirokazu; Kamei, Akihide; Nakamura, Ryosuke; Tsuchida, Satoshi; Maeda, Takahisa

2010-05-01

124

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

2012-09-01

125

Web-Based Interface for Command and Control of Network Sensors  

Science.gov (United States)

This software allows for the visualization and control of a network of sensors through a Web browser interface. It is currently being deployed for a network of sensors monitoring Mt. Saint Helen s volcano; however, this innovation is generic enough that it can be deployed for any type of sensor Web. From this interface, the user is able to fully control and monitor the sensor Web. This includes, but is not limited to, sending "test" commands to individual sensors in the network, monitoring for real-world events, and reacting to those events

Wallick, Michael N.; Doubleday, Joshua R.; Shams, Khawaja S.

2010-01-01

126

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

127

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

128

A survey on architectures, protocols, applications, and management in wireless sensor networks  

Directory of Open Access Journals (Sweden)

Full Text Available With the recent technological advances in wireless communications, integrated digital circuits, and micro electro mechanical systems (MEMS; development of wireless sensor networks has been enabled and become dramatically feasible. Wireless sensor networks (WSNs are large networks made of a numerous number of sensor nodes with sensing, computation, and wireless communications capabilities. Many various routing, power management, and data dissemination protocols have been designed for wireless sensor networks (WSNs dependent on both the network architecture and the applications that it is designed for. In this paper, we present the state of the art of wireless sensor networks’ architecture and design features. Also, in this paper, we introduce recent work on routing protocols for WSNs and their design goals and challenges. Also, an overview of the application that WSNs assist in is presented. Finally, several open research questions of wireless sensor networks management and issues are suggested and put forward.   Keywords: application, architecture, management, protocol, wireless sensor network.

Samira Kalantary

2014-01-01

129

Namibian Flood Early Warning SensorWeb Pilot  

Science.gov (United States)

The major goal of the Namibia SensorWeb Pilot Project is a scientifically sound, operational trans-boundary flood management decision support system for Southern African region to provide useful flood and waterborne disease forecasting tools for local decision makers. The Pilot Project established under the auspices of: Namibian Ministry of Agriculture Water and Forestry (MAWF), Department of Water Affairs; Committee on Earth Observing Satellites (CEOS), Working Group on Information Systems and Services (WGISS); and moderated by the United Nations Platform for Space-based Information for Disaster Management and Emergency Response (UN-SPIDER). The effort consists of identifying and prototyping technology which enables the rapid gathering and dissemination of both space-based and ground sensor data and data products for the purpose of flood disaster management and water-borne disease management.

Mandl, Daniel; Policelli, Fritz; Frye, Stuart; Cappelare, Pat; Langenhove, Guido Van; Szarzynski, Joerg; Sohlberg, Rob

2010-01-01

130

NASA SensorWeb and OGC Standards for Disaster Management  

Science.gov (United States)

I. Goal: Enable user to cost-effectively find and create customized data products to help manage disasters; a) On-demand; b) Low cost and non-specialized tools such as Google Earth and browsers; c) Access via open network but with sufficient security. II. Use standards to interface various sensors and resultant data: a) Wrap sensors in Open Geospatial Consortium (OGC) standards; b) Wrap data processing algorithms and servers with OGC standards c) Use standardized workflows to orchestrate and script the creation of these data; products. III. Target Web 2.0 mass market: a) Make it simple and easy to use; b) Leverage new capabilities and tools that are emerging; c) Improve speed and responsiveness.

Mandl, Dan

2010-01-01

131

A New User Interface for On-Demand Customizable Data Products for Sensors in a SensorWeb  

Science.gov (United States)

A SensorWeb is a set of sensors, which can consist of ground, airborne and space-based sensors interoperating in an automated or autonomous collaborative manner. The NASA SensorWeb toolbox, developed at NASA/GSFC in collaboration with NASA/JPL, NASA/Ames and other partners, is a set of software and standards that (1) enables users to create virtual private networks of sensors over open networks; (2) provides the capability to orchestrate their actions; (3) provides the capability to customize the output data products and (4) enables automated delivery of the data products to the users desktop. A recent addition to the SensorWeb Toolbox is a new user interface, together with web services co-resident with the sensors, to enable rapid creation, loading and execution of new algorithms for processing sensor data. The web service along with the user interface follows the Open Geospatial Consortium (OGC) standard called Web Coverage Processing Service (WCPS). This presentation will detail the prototype that was built and how the WCPS was tested against a HyspIRI flight testbed and an elastic computation cloud on the ground with EO-1 data. HyspIRI is a future NASA decadal mission. The elastic computation cloud stores EO-1 data and runs software similar to Amazon online shopping.

Mandl, Daniel; Cappelaere, Pat; Frye, Stuart; Sohlberg, Rob; Ly, Vuong; Chien, Steve; Sullivan, Don

2011-01-01

132

Importance of the spatial data and the sensor web in the ubiquitous computing area  

Science.gov (United States)

Spatial data has become a critical issue in recent years. In the past years, nearly more than three quarters of databases, were related directly or indirectly to locations referring to physical features, which constitute the relevant aspects. Spatial data is necessary to identify or calculate the relationships between spatial objects when using spatial operators in programs or portals. Originally, calculations were conducted using Geographic Information System (GIS) programs on local computers. Subsequently, through the Internet, they formed a geospatial web, which is integrated into a discoverable collection of geographically related web standards and key features, and constitutes a global network of geospatial data that employs the World Wide Web to process textual data. In addition, the geospatial web is used to gather spatial data producers, resources, and users. Standards also constitute a critical dimension in further globalizing the idea of the geospatial web. The sensor web is an example of the real time service that the geospatial web can provide. Sensors around the world collect numerous types of data. The sensor web is a type of sensor network that is used for visualizing, calculating, and analyzing collected sensor data. Today, people use smart devices and systems more frequently because of the evolution of technology and have more than one mobile device. The considerable number of sensors and different types of data that are positioned around the world have driven the production of interoperable and platform-independent sensor web portals. The focus of such production has been on further developing the idea of an interoperable and interdependent sensor web of all devices that share and collect information. The other pivotal idea consists of encouraging people to use and send data voluntarily for numerous purposes with the some level of credibility. The principal goal is to connect mobile and non-mobile device in the sensor web platform together to operate for serving and collecting information from people.

Akçit, Nuhcan; Tomur, Emrah; Karsl?o?lu, Mahmut O.

2014-08-01

133

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

2005-01-01

134

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

135

Designing Dependable Service Oriented Web Services Security Architectures Solutions  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ...

Upendra Kumar, M.; Sravan Kumar, Dr D.

2010-01-01

136

From Sensor to Observation Web with Environmental Enablers in the Future Internet  

Directory of Open Access Journals (Sweden)

Full Text Available 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.

Jose Lorenzo Mon

2011-03-01

137

Single-photon sampling architecture for solid-state imaging sensors  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We propose a highly compressed readout architecture for arrays of imaging sensors capable of detecting individual photons. By exploiting sparseness properties of the input signal, our architecture can provide the same information content as conventional readout designs while using orders of magnitude fewer output channels. This is achieved using a unique interconnection topology based on group-testing theoretical considerations. Unlike existing designs, this promises a low-cost sensor with hi...

Den Berg, Ewout; Cande?s, Emmanuel; Chinn, Garry; Levin, Craig; Olcott, Peter Demetri; Sing-long, Carlos

2013-01-01

138

Development of an Web Service Architecture for Enterprise Application Integration  

International Nuclear Information System (INIS)

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 Integrniversal Description, Discovery and Integration (UDDI). Clients find desired services through the UDDI and get services from service providers through Web Service Description Language(WSDL)

139

Text Mining-Based Semantic Web Architecture (TMSWA for e-Learning Systems  

Directory of Open Access Journals (Sweden)

Full Text Available This paper highlights semantic web techniques and proposes architecture for e-Learning-based systems for the academic portal. Text mining is used with the proposed model for better processing of unstructured data available in XML and RDF formats. An algorithm will be used to support building a web retrieval system to extract the hidden knowledge for the semantic web by ontologies for e-learning items to classify and find the relationships between the leaning items via the academic portal.

Hamad Ibrahim

2014-08-01

140

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

2010-08-01

 
 
 
 
141

Web Based System Architecture for Long Pulse Remote Experimentation  

International Nuclear Information System (INIS)

INDRA is the first Information Technology company in Spain and it presents here, through a series of transparencies, its own approach for the remote experimentation architecture for long pulses (REAL). All the architecture is based on Java-2 platform standards and REAL is a totally open architecture. By itself REAL offers significant advantages: -) access authentication and authorization under multiple security implementations, -) local or remote network access: LAN, WAN, VPN..., -) on-line access to acquisition systems for monitoring and configuration, -) scalability, flexibility, robustness, platform independence,.... The BeansNet implementation of REAL gives additional good things such as: -) easy implementation, -) graphical tool for service composition and configuration, -) availability and hot-swap (no need of stopping or restarting services after update or remodeling, and -) INDRA support. The implementation of BeansNet at the TJ-2 stellarator at Ciemat is presented. This document is made of the presentation transparencies. (A.C.)

142

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: English 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 trabaj [...] os 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 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 betwee [...] n 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 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.

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

2010-04-01

143

Sensor Web for Spatio-Temporal Monitoring of a Hydrological Environment  

Science.gov (United States)

The Sensor Web is a macroinstrument concept that allows for the spatio-temporal understanding of an environment through coordinated efforts between multiple numbers and types of sensing platforms, including, in its most general form, both orbital and terrestrial and both fixed and mobile. Each of these platforms, or pods, communicates within its local neighborhood and thus distributes information to the instrument as a whole. The result of sharing and continual processing of this information among all the Sensor Web elements will result in an information flow and a global perception of and reactive capability to the environment. As illustrated, the Sensor Web concept also allows for the recursive notion of a web of webs with individual distributed instruments possibly playing the role of a single node point on a larger Sensor Web instrument. In particular, the fusion of inexpensive, yet sophisticated, commercial technology from both the computation and telecommunication revolutions has enabled the development of practical, fielded, and embedded in situ systems that have been the focus of the NASA/JPL Sensor Webs Project (http://sensorwebs.jpl.nasa.gov/). These Sensor Webs are complete systems consisting of not only the pod elements that wirelessly communicate among themselves, but also interfacing and archiving software that allows for easy use by the end-user. Previous successful deployments have included environments as diverse as coastal regions, Antarctica, and desert areas. The Sensor Web has broad implications for Earth and planetary science and will revolutionize the way experiments and missions are conceived and performed. As part of our current efforts to develop a macrointelligence within the system, we have deployed a Sensor Web at the Central Avra Valley Storage and Recovery Project (CAVSARP) facility located west of Tucson, AZ. This particular site was selected because it is ideal for studying spatio-temporal phenomena and for providing a test site for more sophisticated hydrological studies in the future.

Delin, K. A.; Jackson, S. P.; Johnson, D. W.; Burleigh, S. C.; Woodrow, R. R.; McAuley, M.; Britton, J. T.; Dohm, J. M.; Ferre, T. P. A.; Ip, Felipe

2004-01-01

144

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

2012-02-01

145

FAST REAL TIME ANALYSIS OF WEB SERVER MASSIVE LOG FILES USING AN IMPROVED WEB MINING ARCHITECTURE  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The web has played a vital role to detect the information and finding the reasons to organize a system. As the web sites were increased, the web log files also increased based on the web searching. Our challenge and the task are to reduce the log files and classify the best results to reach the task which we used. Aimed to overcome the deficiency of abundant data to web mining, the study proposed a path extraction using Euclidean Distance based algorithm with a sequential pattern clustering m...

Hussain Mohammad Abu-Dalbouh

2013-01-01

146

Robust Networking Architecture and Secure Communication Scheme for Heterogeneous Wireless Sensor Networks  

Science.gov (United States)

Current networking architectures and communication protocols used for Wireless Sensor Networks (WSNs) have been designed to be energy efficient, low latency, and long network lifetime. One major issue that must be addressed is the security in data communication. Due to the limited capabilities of low cost and small sized sensor nodes, designing…

McNeal, McKenzie, III.

2012-01-01

147

A novel architecture for information retrieval system based on semantic web  

Science.gov (United States)

Nowadays, the web has enabled an explosive growth of information sharing (there are currently over 4 billion pages covering most areas of human endeavor) so that the web has faced a new challenge of information overhead. The challenge that is now before us is not only to help people locating relevant information precisely but also to access and aggregate a variety of information from different resources automatically. Current web document are in human-oriented formats and they are suitable for the presentation, but machines cannot understand the meaning of document. To address this issue, Berners-Lee proposed a concept of semantic web. With semantic web technology, web information can be understood and processed by machine. It provides new possibilities for automatic web information processing. A main problem of semantic web information retrieval is that when these is not enough knowledge to such information retrieval system, the system will return to a large of no sense result to uses due to a huge amount of information results. In this paper, we present the architecture of information based on semantic web. In addiction, our systems employ the inference Engine to check whether the query should pose to Keyword-based Search Engine or should pose to the Semantic Search Engine.

Zhang, Hui

2011-12-01

148

Web based system architecture for long pulse remote experimentation  

International Nuclear Information System (INIS)

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.

149

Web Based System Architecture for Long Pulse Remote Experimentation  

International Nuclear Information System (INIS)

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) system administration. (authors)

150

Intelligent Information Retrieval and Web Mining Architecture Using SOA  

Science.gov (United States)

The study of this dissertation provides a solution to a very specific problem instance in the area of data mining, data warehousing, and service-oriented architecture in publishing and newspaper industries. The research question focuses on the integration of data mining and data warehousing. The research problem focuses on the development of…

El-Bathy, Naser Ibrahim

2010-01-01

151

Web services, service-oriented architectures, and cloud computing the Savvy manager''s guide  

CERN Document Server

Web services are leading to the use of more packaged software either as an internal service or an external service available over the Internet. These services, which will be connected together to create the information technology systems of the future, will require less custom software in our organizations and more creativity in the connections between the services. This book begins with a high-level example of how an average person in an organization might interact with a service-oriented architecture. As the book progresses, more technical detail is added in a "peeling of the onion" approach. The leadership opportunities within these developing service-oriented architectures are also explained. At the end of the book there is a compendium or "pocket library" for software technology related to service-oriented architectures.· Only web services book to cover both data management and software engineering perspectives, excellent resource for ALL members of IT teams· Jargon free, highly illustrated, with intro...

Barry, Douglas K

2003-01-01

152

Two Echelon Architecture Using Relay Node Placement in Wireless Sensor Network  

Directory of Open Access Journals (Sweden)

Full Text Available A Wireless Sensor Network (WSN is composed of a large number of tiny sensor nodes, relay nodes and a sink that are deployed in an environment to collect information. Irregular placement of sensor nodes in WSN causes unbalanced energy depletion and reduces the overall performance of WSN. The extra cost of processing and redundant links occurrence of sensor nodes in the congested sensor node topology maximizes the overhead of wireless sensor network. In proposed two-echelon architecture, minimum sensor node deployment algorithm is used to achieve full coverage and relay node deployment algorithm is used to reduce redundant data links. In first echelon, the sensor node sends its data to relay nodes. In second echelon, the relay node forwards the incoming packets to the sink. Simulation result presents that our proposed work enhanced the lifetime of the network and data delivery. It also ensures more than 95% of the total energy utilization of the network.

Atiq-Ur -Rahman

2015-01-01

153

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

2009-01-01

154

Agents negotiating in a semantic web architecture (SWA)  

Digital Repository Infrastructure Vision for European Research (DRIVER)

La arquitectura semántica diseñada ha sido probada dentro del entorno de la gestión de los derechos de la propiedad intelectual. Esta permite asimilar nuevos módulos y cambios en la estructura. Se ha diseñado específicamente una propia ontología: IPROnto, que es totalmente interoperable con el resto de estándares, y propone una nueva forma de gestionar los derechos de la propiedad intelectual.Se realizó un análisis estadístico de la Web Semántica así como de los elementos que est...

Gil Iranzo, Rosa Mari?a

2005-01-01

155

A Dynamic Architecture for Reconfiguration of Web Servers Clusters  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 admin...

Carla Marques; Isabel Oliveira; Giovanni Barroso; Antonio Serra

2011-01-01

156

Web Service Architecture for a Meta Search Engine  

Digital Repository Infrastructure Vision for European Research (DRIVER)

With the rapid advancements in Information Technology, Information Retrieval on Internet is gaining its importance day by day. Nowadays there are millions of Websites and billions of homepages available on the Internet. Search Engines are the essential tools for the purpose of retrieving the required information from the Web. But the existing search engines have many problems such as not having wide scope, imbalance in accessing the sites etc. So, the effectiveness of a search engine plays a ...

Srinivas, K.; Srinivas, P. V. S.; Govardhan, A.

2011-01-01

157

A New Information Architecture, Web Site and Services for the CMS Experiment  

CERN Document Server

The age and size of the CMS collaboration at the LHC means it now has many hundreds of inhomogeneous web sites and services and more than 100,000 documents. We describe a major initiative to create a single coherent CMS internal and public web site. This uses the Drupal web Content Management System (now supported by CERN/IT) on top of a standard LAMP stack (Linux, Apache, MySQL, and php/perl). The new navigation, content and search services are coherently integrated with numerous existing CERN services (CDS, EDMS, Indico, phonebook, Twiki) as well as many CMS internal Web services. We describe the information architecture; the system design, implementation and monitoring; the document and content database; security aspects; and our deployment strategy which ensured continual smooth operation of all systems at all times.

CERN. Geneva

2012-01-01

158

A Simple Fiber Bragg Grating-Based Sensor Network Architecture with Self-Protecting and Monitoring Functions  

Digital Repository Infrastructure Vision for European Research (DRIVER)

A novel fiber Bragg grating (FBG)-based passive sensor architecture, which can be used to protect the fiber cut and monitor the multiple sensors simultaneously, is proposed and experimentally demonstrated. Here, we employ a wavelength-tunable erbium-doped fiber (EDF) laser scheme with 25 km cavity length acting as the detecting light source in central office (CO). Each FBG sensor, serving as a feedback element, is used in proposed sensor architecture. By tuning the tunable bandpass filter (TB...

Chien-Hung Yeh; Chi-Wai Chow; Fan-Gang Tseng; Ping-Chun Wu

2011-01-01

159

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

2009-06-01

160

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

2013-04-01

 
 
 
 
161

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

162

Automated Data Quality Assurance using OGC Sensor Web Enablement Frameworks for Marine Observatories  

Science.gov (United States)

Over the past years, environmental sensors have continuously improved by becoming smaller, cheaper, and more intelligent. Therefore, many sensor networks are increasingly deployed to monitor our environment. But due to the large number of sensor manufacturers, accompanying protocols and data encoding, automated integration and data quality assurance of diverse sensors in an observing systems is not straightforward, requiring development of data management code and manual tedious configuration. However, over the past few years it has been demonstrated that Open-Geospatial Consortium (OGC) frameworks can enable web services with fully-described sensor systems, including data processing, sensor characteristics and quality control tests and results. So far, the SWE framework does not describe how to integrate sensors on-the-fly with minimal human intervention. The data management software which enables access to sensors, data processing and quality control tests has to be implemented and the results have to be manually mapped to the SWE models. In this contribution, we describe a Sensor Plug & Play infrastructure for the Sensor Web by combining (1) OGC PUCK protocol - a simple standard embedded instrument protocol to store and retrieve directly from the devices the declarative description of sensor characteristics and quality control tests, (2) an automatic mechanism for data processing and quality control tests underlying the Sensor Web - the Sensor Interface Descriptor (SID) concept, as well as (3) a model for the declarative description of sensor which serves as a generic data management mechanism - designed as a profile and extension of OGC SWE's SensorML standard. We implement and evaluate our approach by applying it to the OBSEA Observatory, and can be used to demonstrate the ability to assess data quality for temperature, salinity, air pressure and wind speed and direction observations off the coast of Garraf, in the north-eastern Spain.

Toma, Daniel; Bghiel, Ikram; del Rio, Joaquin; Hidalgo, Alberto; Carreras, Normandino; Manuel, Antoni

2014-05-01

163

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 SciELO Mexico | Language: Spanish 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 Sy [...] stem 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 un 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 a [...] nd 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 employs 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.

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

2009-06-01

164

Distributed Real Time Architecture for Data Placement in Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Problem statement: Application scenarios of Wireless Sensor Networks (WSN create interesting design challenges since the sensor nodes used to collect and communicate data may fail suddenly and unpredictably. The issue of real-time and reliable data delivery is extremely important for taking effective decisions in WSN. Approach: In this study we proposed architecture for reliable and real-time approach for data placement using sensor clusters. Instead of storing information in individual cluster heads as suggested in some protocols, in our architecture we suggest storing of information of all clusters within a cell in the corresponding base station. For data dissemination and action we have used Action and Relay Stations (ARS. Results: We developed programming model for formal specification of our architecture. Conclusion: Present model not only offers real time sensing and monitoring, but also provides real time dynamic decision making based on the sensed data. Moreover it prolongs network life time.

Sanjeev Gupta

2009-01-01

165

FAST REAL TIME ANALYSIS OF WEB SERVER MASSIVE LOG FILES USING AN IMPROVED WEB MINING ARCHITECTURE  

Directory of Open Access Journals (Sweden)

Full Text Available The web has played a vital role to detect the information and finding the reasons to organize a system. As the web sites were increased, the web log files also increased based on the web searching. Our challenge and the task are to reduce the log files and classify the best results to reach the task which we used. Aimed to overcome the deficiency of abundant data to web mining, the study proposed a path extraction using Euclidean Distance based algorithm with a sequential pattern clustering mining algorithm. First, we construct the Relational Information System using original data sets. Second, we here cluster the data by the Sequential Pattern Clustering Method for the data sets which make use of the data to produce Core of Information System. Web mining core data is the most important and necessary information which cannot reduce an original Information System. So it can get the same effect as original data sets to data analysis and can construct classification modeling using it. Third, we here used Sequential pattern clustering method with the help of Path Extraction. The experiment shows that the proposed algorithm can get high efficiency and avoid the abundant data in follow-up data processing.

Hussain Mohammad Abu-Dalbouh

2013-01-01

166

An Open Distributed Architecture for Sensor Networks for Risk Management  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Sensors provide some of the basic input data for risk management of natural and man-made hazards. Here the word ‘sensors’ covers everything from remote sensing satellites, providing invaluable images of large regions, through instruments installed on the Earth's surface to instruments situated in deep boreholes and on the sea floor, providing highly-detailed point-based information from single sites. Data from such sensors is used in all stages of risk management, from hazard, vulnerabili...

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

2008-01-01

167

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

2011-05-01

168

System Architecture Modeling of an UWB Receiver for Wireless Sensor Network  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper presents a method for system architecture modeling of an IR-UWB (Impulse Radio Ultra WideBand) receiver for sensors networks applications. We expose the way for designing an FPGA (Field Programmable Gate Array) receiver starting from a previous study based on system modeling on Matlab. The proposed receiver architecture is first designed and validated on Matlab, before being implemented, thanks to VHDL language, on a FPGA. Our study shows the interest and the advantages of co-desig...

Lecointre, Aubin; Dragomirescu, Daniela; Plana, Robert

2007-01-01

169

Relational Access Control with Bivalent Permissions in a Social Web/Collaboration Architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We describe an access control model that has been implemented in the web content management framework "Deme" (which rhymes with "team"). Access control in Deme is an example of what we call "bivalent relation object access control"(BROAC). This model builds on recent work by Giunchiglia et al. on relation-based access control (RelBAC), as well as other work on relational, flexible, fine-grained, and XML access control models. We describe Deme's architecture and review access...

Davies, Todd; Mintz, Mike D.

2013-01-01

170

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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. Th...

Tien-You Wang; Din-Horng Yeh

2009-01-01

171

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 appl...

Bjorn Stelte

2010-01-01

172

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

2009-08-01

173

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 netw...

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

2011-01-01

174

Sensor Web in Antarctica: Developing an Intelligent, Autonomous Platform for Locating Biological Flourishes in Cryogenic Environments  

Science.gov (United States)

The most rigorous tests of the ability to detect extant life will occur where biotic activity is limited by severe environmental conditions. Cryogenic environments are among the most severe-the energy and nutrients needed for biological activity are in short supply while the climate itself is actively destructive to biological mechanisms. In such settings biological activity is often limited to brief flourishes, occurring only when and where conditions are at their most favorable. The closer that typical regional conditions approach conditions that are actively hostile , the more widely distributed biological blooms will be in both time and space. On a spatial dimension of a few meters or a time dimension of a few days, biological activity becomes much more difficult to detect. One way to overcome this difficulty is to establish a Sensor Web that can monitor microclimates over appropriate scales of time and distance, allowing a continuous virtual presence for instant recognition of favorable conditions. A more sophisticated Sensor Web, incorporating metabolic sensors, can effectively meet the challenge to be in "the right place in the right time". This is particularly of value in planetary surface missions, where limited mobility and mission timelines require extremely efficient sample and data acquisition. Sensor Webs can be an effective way to fill the gap between broad scale orbital data collection and fine-scale surface lander science. We are in the process of developing an intelligent, distributed and autonomous Sensor Web that will allow us to monitor microclimate under severe cryogenic conditions, approaching those extant on the surface of Mars. Ultimately this Sensor Web will include the ability to detect and/or establish limits on extant microbiological activity through incorporation of novel metabolic gas sensors. Here we report the results of our first deployment of a Sensor Web prototype in a previously unexplored high altitude East Antarctic Plateau "micro-oasis" at the MacAlpine Hills, Law Glacier, Antarctica.

Delin, K. A.; Harvey, R. P.; Chabot, N. A.; Jackson, S. P.; Adams, Mike; Johnson, D. W.; Britton, J. T.

2003-01-01

175

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

176

Sandwich node architecture for agile wireless sensor networks for real-time structural health monitoring applications  

Science.gov (United States)

In recent years, wireless sensor network (WSN), as a powerful tool, has been widely applied to structural health monitoring (SHM) due to its low cost of deployment. Several commercial hardware platforms of wireless sensor networks (WSN) have been developed and used for structural monitoring applications [1,2]. A typical design of a node includes a sensor board and a mote connected to it. Sensing units, analog filters and analog-to-digital converters (ADCs) are integrated on the sensor board and the mote consists of a microcontroller and a wireless transceiver. Generally, there are a set of sensor boards compatible with the same model of mote and the selection of the sensor board depends on the specific applications. A WSN system based on this node lacks the capability of interrupting its scheduled task to start a higher priority task. This shortcoming is rooted in the hardware architecture of the node. The proposed sandwich-node architecture is designed to remedy the shortcomings of the existing one for task preemption. A sandwich node is composed of a sensor board and two motes. The first mote is dedicated to managing the sensor board and processing acquired data. The second mote controls the first mote via commands. A prototype has been implemented using Imote2 and verified by an emulation in which one mote is triggered by a remote base station and then preempts the running task at the other mote for handling an emergency event.

Wang, Zi; Pakzad, Shamim; Cheng, Liang

2012-04-01

177

An Architecture for Intelligent Systems Based on Smart Sensors  

Science.gov (United States)

Based on requirements for a next-generation rocket test facility, elements of a prototype Intelligent Rocket Test Facility (IRTF) have been implemented. A key component is distributed smart sensor elements integrated using a knowledgeware environment. One of the specific goals is to imbue sensors with the intelligence needed to perform self diagnosis of health and to participate in a hierarchy of health determination at sensor, process, and system levels. The preliminary results provide the basis for future advanced development and validation using rocket test stand facilities at Stennis Space Center (SSC). We have identified issues important to further development of health-enabled networks, which should be of interest to others working with smart sensors and intelligent health management systems.

Schmalzel, John; Figueroa, Fernando; Morris, Jon; Mandayam, Shreekanth; Polikar, Robi

2004-01-01

178

Doubly Cognitive Architecture Based Cognitive Wireless Sensor Network  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Nowadays scarcity of spectrum availability is increasing highly. Adding cognition to the existing Wireless Sensor Network (WSN) infrastructure will help in this situation. As sensor nodes in WSN are limited with some constrains like power, efforts are required to increase the lifetime and other performance measures of the network. In this paper we propose the idea of Doubly Cognitive WSN. The basic idea is to progressively allocate the sensing resources only to the most prom...

Kumar, Sumit; Singhal, Deepti; Garimella, Rama Murthy

2011-01-01

179

An Autonomous Sensor System Architecture for Active Flow and Noise Control Feedback  

Science.gov (United States)

Multi-channel sensor fusion represents a powerful technique to simply and efficiently extract information from complex phenomena. While the technique has traditionally been used for military target tracking and situational awareness, a study has been successfully completed that demonstrates that sensor fusion can be applied equally well to aerodynamic applications. A prototype autonomous hardware processor was successfully designed and used to detect in real-time the two-dimensional flow reattachment location generated by a simple separated-flow wind tunnel model. The success of this demonstration illustrates the feasibility of using autonomous sensor processing architectures to enhance flow control feedback signal generation.

Humphreys, William M, Jr.; Culliton, William G.

2008-01-01

180

Wireless sensors with dual-controller architecture for active diagnosis in structural health monitoring  

International Nuclear Information System (INIS)

Wireless sensor technology, which integrates transducers with microcontrollers and wireless communication, has become increasingly vital in structural health monitoring (SHM) applications. However, the low I/O (input/output) throughput of conventional wireless sensors impedes their usage in applications using high-frequency signals, such as active diagnosis and passive acoustic emission (AE). In this paper, the limitations of extending conventional wireless sensors to handle high-speed acquisition are first identified and discussed. Based on the efforts made in improving wireless sensors with centralized system architecture, a novel dual-controller based architecture is proposed to facilitate high-speed data acquisition and improve power efficiency. Then, a wireless sensor platform, specifically designed for active diagnosis employing stress waves to localize damages, is presented. The newly developed wireless sensor with dimensions of 30 mm × 30 mm × 35 mm utilizes a field programmable gate array (FPGA) as a secondary controller and can support a sampling rate up to 20 million samples per second (Msps). Laboratory experiments for verification show that the wireless sensor can explore new applications at the opposite end of the spectrum from conventional applications: those involving high fidelity and high-speed data acquisition

 
 
 
 
181

Heterogeneous sensor networks: a bio-inspired overlay architecture  

Science.gov (United States)

The Army currently employs heterogeneous unattended ground sensors (UGSs) using a sparse deployment to maximize coverage, minimize pilferage and to monitor terrain bottlenecks. A team consisting of Teledyne Scientific Company, the University of California at Santa Barbara and the US Army Research Laboratory (ARL) is developing technologies in support of automated data exfiltration from heterogeneous battlefield sensor networks as part of a US Army contract1 with the Institute for Collaborative Biotechnologies (ICB). The ICB program is developing a new system consisting of novel bio-inspired software algorithms for autonomous operations that will leverage proven research to monitor sensor networks from extended ranges, that will collect data in a timely fashion, that will collaboratively control the motion of a sparse network of collectors (e.g., UAVs) using bio-inspired sampling, that will accurately detect and localize field events and will fuse and classify sensed data. A new bio-inspired event discovery technique will enable fusion of sensor observations at low SNR without requiring a prior model for the event signature; this is a first step towards sensor networks that are capable of learning. The program will also provide both laboratory and field demonstrations of these capabilities supported through ARL by leveraging available resources.

Burman, Jerry; Hespanha, Joao; Madhow, Upamanyu; Klein, Daniel; Pham, Tien; Swami, Ananthram

2009-05-01

182

Model of Real Time Architecture for Data Placement in Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Wireless sensor network (WSN technology has promised fine grain monitoring in time and space as well as at a lower cost than is currently possible. These sensor networks are required to provide a robust service in hostile environments. Therefore the issue of real-time and reliable data delivery is extremely important for taking effective decisions in WSN. In this paper the architecture for reliable and real time approach by using sensor clusters has been proposed for storage management. Instead of storing information in an individual cluster head as suggested in some approaches, storing of information of all clusters, inside the cell is recommended within the corresponding base station. For data dissemination and action we have used Action and Relay Stations (ARS. We have developed programming model for formal specification and verification of our architecture.

Mayank DAVE

2010-01-01

183

WEB-ENABLED GENERALIZED ARCHITECTURAL MODEL FOR ONLINE POWER SYSTEM ANALYSIS  

Directory of Open Access Journals (Sweden)

Full Text Available In this study, an effective Web-enabled generalized architectural model is proposed. The proposed model makes the power system analysis to be completely secured, distributed, platform-independent and language-independent. Although significant progress has been made for on-line power system analysis in distributed environment, still efficient distributed environment has not yet been exploited. The Web-enabled architectural models are emerging as basic methodologies to support the integration of different power system applications using open Internet standard. The existing RMI models for solving multi-area power system problems in distributed environment, has its limitations to use in internet-based applets. The main objective of this study is to convert existing RMI model for power system applications into Web based model for on-line monitoring of multi-area power systems in distributed environment. Test bench has been created to carry out the performance analysis of the proposed model. Using the proposed model, load flow analysis is carried out for various bus systems. The results obtained are reported.

Boopathi C. Sengodan

2013-01-01

184

Wireless sensor networks for activity monitoring using multi-sensor multi-modal node architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

A multi-sensor, multi-modal sensor node for human and vehicle activity monitoring is designed and developed. As a first step to achieve our objective, we have used a dual pyroelectric IR (PIR) sensor system for human activity monitoring. The sampled data from two PIR sensors, under laboratory conditions, is first processed individually to determine the event window size, which is then fed to simple algorithms to determine direction and potentially measure speed of passing humans. We als...

Hung, Peter; Tahir, Muhammad; Farrell, Ronan; Mcloone, Sean

2009-01-01

185

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

186

An Architecture for Performance Optimization in a Collaborative Knowledge-Based Approach for  Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available 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.

Juan Ramon Velasco

2011-09-01

187

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.

Mohammed FEHAM

2012-11-01

188

Sensor web enablement in a network of low-energy, low-budget amateur weather stations  

Science.gov (United States)

Sensor Web Enablement (OGC SWE) has developed in into a powerful concept with many potential applications in environmental monitoring and in other fields. This has spurred development of software applications for Sensor Observation Services (SOS), while the development of client applications still lags behind. Furthermore, the deployment of sensors in the field often places tight constraints on energy and bandwidth available for data capture and transmission. As a „proof of concept" we equipped amateur weather stations with low-budget, standard components to read the data from its base station and feed the weather observation data into the sensor observation service using its standard web-service interface. We chose amateur weather station as an example because of the simplicity of measured phenomena and low data volume. As sensor observation service we chose the open source software package offered by the 52°North consortium. Furthermore, we investigated registry services for sensors and measured phenomena. When deploying a sensor platform in the field, power consumption can be an issue. Instead of common PCs we used Network Storage Link Units (NSLU2) with a Linux operating system, also known as "Debian SLUG". The power consumption of a "SLUG" is of the order of 1W, compared to 40W in a small PC. The "SLUG" provides one ethernet and two USB ports, one used by its external USB hard-drive. This modular set-up is open to modifications, for example the addition of a GSM modem for data transmission over a cellular telephone network. The simple set-up, low price, low power consumption, and the low technological entry-level allow many potential uses of a "SLUG" in environmental sensor networks in research, education and citizen science. The use of a mature sensor observation service software allows an easy integration of monitoring networks with other web services.

Herrnkind, S.; Klump, J.; Schmidt, G.

2009-04-01

189

OneGeology-Europe: architecture, portal and web services to provide a European geological map  

Science.gov (United States)

OneGeology-Europe is a large ambitious project to make geological spatial data further known and accessible. The OneGeology-Europe project develops an integrated system of data to create and make accessible for the first time through the internet the geological map of the whole of Europe. The architecture implemented by the project is web services oriented, based on the OGC standards: the geological map is not a centralized database but is composed by several web services, each of them hosted by a European country involved in the project. Since geological data are elaborated differently from country to country, they are difficult to share. OneGeology-Europe, while providing more detailed and complete information, will foster even beyond the geological community an easier exchange of data within Europe and globally. This implies an important work regarding the harmonization of the data, both model and the content. OneGeology-Europe is characterised by the high technological capacity of the EU Member States, and has the final goal to achieve the harmonisation of European geological survey data according to common standards. As a direct consequence Europe will make a further step in terms of innovation and information dissemination, continuing to play a world leading role in the development of geosciences information. The scope of the common harmonized data model was defined primarily by the requirements of the geological map of Europe, but in addition users were consulted and the requirements of both INSPIRE and ‘high-resolution' geological maps were considered. The data model is based on GeoSciML, developed since 2006 by a group of Geological Surveys. The data providers involved in the project implemented a new component that allows the web services to deliver the geological map expressed into GeoSciML. In order to capture the information describing the geological units of the map of Europe the scope of the data model needs to include lithology; age; genesis and metamorphic character. For high resolution maps physical properties, bedding characteristics and weathering also need to be added. Furthermore, Geological data held by national geological surveys is generally described in national language of the country. The project has to deal with the multilingual issue, an important requirement of the INSPIRE directive. The project provides a list of harmonized vocabularies, a set of web services to deal with them, and a web site for helping the geoscientists while mapping the terms used into the national datasets into these vocabularies. The web services provided by each data provider, with the particular component that allows them to deliver the harmonised data model and to handle the multilingualism, are the first part of the architecture. The project also implements a web portal that provides several functionalities. Thanks to the common data model implemented by each web service delivering a part of the geological map, and using OGC SLD standards, the client offers the following option. A user can request for a sub-selection of the map, for instance searching on a particular attribute such as "age is quaternary", and display only the parts of the map according to the filter. Using the web services on the common vocabularies, the data displayed are translated. The project started September 2008 for two years, with 29 partners from 20 countries (20 partners are Geological Surveys). The budget is 3.25 M€, with a European Commission contribution of 2.6 M€. The paper will describe the technical solutions to implement OneGeology-Europe components: the profile of the common data model to exchange geological data, the web services to view and access geological data; and a geoportal to provide the user with a user-friendly way to discover, view and access geological data.

Tellez-Arenas, Agnès.; Serrano, Jean-Jacques; Tertre, François; Laxton, John

2010-05-01

190

Application of Service Oriented Architecture for Sensors and Actuators in District Heating Substations  

Directory of Open Access Journals (Sweden)

Full Text Available Hardwired sensor installations using proprietary protocols found in today’s district heating substations limit the potential usability of the sensors in and around the substations. If sensor resources can be shared and re-used in a variety of applications, the cost of sensors and installation can be reduced, and their functionality and operability can be increased. In this paper, we present a new concept of district heating substation control and monitoring, where a service oriented architecture (SOA is deployed in a wireless sensor network (WSN, which is integrated with the substation. IP-networking is exclusively used from sensor to server; hence, no middleware is needed for Internet integration. Further, by enabling thousands of sensors with SOA capabilities, a System of Systems approach can be applied. The results of this paper show that it is possible to utilize SOA solutions with heavily resource-constrained embedded devices in contexts where the real-time constrains are limited, such as in a district heating substation.

Jonas Gustafsson

2014-08-01

191

Application of service oriented architecture for sensors and actuators in district heating substations.  

Science.gov (United States)

Hardwired sensor installations using proprietary protocols found in today's district heating substations limit the potential usability of the sensors in and around the substations. If sensor resources can be shared and re-used in a variety of applications, the cost of sensors and installation can be reduced, and their functionality and operability can be increased. In this paper, we present a new concept of district heating substation control and monitoring, where a service oriented architecture (SOA) is deployed in a wireless sensor network (WSN), which is integrated with the substation. IP-networking is exclusively used from sensor to server; hence, no middleware is needed for Internet integration. Further, by enabling thousands of sensors with SOA capabilities, a System of Systems approach can be applied. The results of this paper show that it is possible to utilize SOA solutions with heavily resource-constrained embedded devices in contexts where the real-time constrains are limited, such as in a district heating substation. PMID:25196165

Gustafsson, Jonas; Kyusakov, Rumen; Mäkitaavola, Henrik; Delsing, Jerker

2014-01-01

192

Low-energy, low-budget sensor web enablement of an amateur weather station  

Science.gov (United States)

Sensor Web Enablement (OGC SWE) has developed in into a powerful concept with many potential applications in environmental monitoring and in other fields. This has spurred development of software applications for Sensor Observation Services (SOS), while the development of client applications still lags behind. Furthermore, the deployment of sensors in the field often places tight constraints on energy and bandwidth available for data capture and transmission. As a "proof of concept" we equipped an amateur weather station with low-budget, standard components to read the data from its base station and feed it into a sensor observation service using its standard web- service interface. We chose the weather station as an example because of its simple measured phenomena and its low data volume. As sensor observation service we chose the open source software package offered by the 52North consortium. Power consumption can be problematic when deploying a sensor platform in the field. Instead of a common PC we used a Network Storage Link Unit (NSLU2) with a Linux operating system, a configuration also known as "Debian SLUG". The power consumption of a "SLUG" is of the order of 2 to 5 Watt, compared to 40W in a small PC. The "SLUG" provides one ethernet and two USB ports, one used by its external USB hard-drive. This modular setup is open to modifications, for example the addition of a GSM modem for data transmission over a cellular telephone network. The simple setup, low price, low power consumption, and the low technological entry-level allow many potential uses of a "SLUG" in environmental sensor networks in research, education and citizen science. The use of a mature sensor observation service software allows an easy integration of monitoring networks with other web services.

Schmidt, G.; Herrnkind, S.; Klump, J.

2008-12-01

193

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 mobilit...

Seokhoon Yoon; Hoon Oh; Duc Van Le

2013-01-01

194

A Survey of System Architecture Requirements for Health Care-Based Wireless Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Wireless Sensor Networks (WSNs) have emerged as a viable technology for a vast number of applications, including health care applications. To best support these health care applications, WSN technology can be adopted for the design of practical Health Care WSNs (HCWSNs) that support the key system architecture requirements of reliable communication, node mobility support, multicast technology, energy efficiency, and the timely delivery of data. Work in the literature mostly focuses on the phy...

Fapojuwo, Abraham O.; Egbogah, Emeka E.

2011-01-01

195

Ensuring Data Storage Security in Tree cast Routing Architecture for Sensor Networks  

Science.gov (United States)

In this paper presents recent advances in technology have made low-cost, low-power wireless sensors with efficient energy consumption. A network of such nodes can coordinate among themselves for distributed sensing and processing of certain data. For which, we propose an architecture to provide a stateless solution in sensor networks for efficient routing in wireless sensor networks. This type of architecture is known as Tree Cast. We propose a unique method of address allocation, building up multiple disjoint trees which are geographically inter-twined and rooted at the data sink. Using these trees, routing messages to and from the sink node without maintaining any routing state in the sensor nodes is possible. In contrast to traditional solutions, where the IT services are under proper physical, logical and personnel controls, this routing architecture moves the application software and databases to the large data centers, where the management of the data and services may not be fully trustworthy. This unique attribute, however, poses many new security challenges which have not been well understood. In this paper, we focus on data storage security, which has always been an important aspect of quality of service. To ensure the correctness of users' data in this architecture, we propose an effective and flexible distributed scheme with two salient features, opposing to its predecessors. By utilizing the homomorphic token with distributed verification of erasure-coded data, our scheme achieves the integration of storage correctness insurance and data error localization, i.e., the identification of misbehaving server(s). Unlike most prior works, the new scheme further supports secure and efficient dynamic operations on data blocks, including: data update, delete and append. Extensive security and performance analysis shows that the proposed scheme is highly efficient and resilient against Byzantine failure, malicious data modification attack, and even server colluding attacks.

Kumar, K. E. Naresh; Sagar, U. Vidya; Waheed, Mohd. Abdul

2010-10-01

196

A multiagent architecture for an underground river network of intelligent sensors  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper deals with an application of multiagent systems to sensor network management. This wireless communication network will be applied to monitor an underground hydrographic network. We first present the ENVSYS project: its origin and its issue. We then recall the concepts of agent and multiagent systems. We sketch a multiagent system's architecture according to the AEIO method. This multiagent system consists of hybrid agents. We also introduce the ASTRO agent model.

Jamont, Jean-paul; Occello, Michel; Lagreze, Andre?

2002-01-01

197

Implementations of Sensor Webs Utilizing Uninhabited Aerial Systems  

Science.gov (United States)

In this paper we describe the web services, processes, communication protocols and ad-hoc service chains utilized in the late summer and early fall 2007 Ikhana UAS response to the wildfires burning in southern California. Additionally, we describe the lessons learned that will be applied to the upcoming Global Hawk UAS Aura Satellite Validation Experiment planned for early 2009.

Sullivan, Donald V.

2009-01-01

198

Enviro-Net: From Networks of Ground-Based Sensor Systems to a Web Platform for Sensor Data Management  

Directory of Open Access Journals (Sweden)

Full Text Available Ecosystems monitoring is essential to properly understand their development and the effects of events, both climatological and anthropological in nature. The amount of data used in these assessments is increasing at very high rates. This is due to increasing availability of sensing systems and the development of new techniques to analyze sensor data. The Enviro-Net Project encompasses several of such sensor system deployments across five countries in the Americas. These deployments use a few different ground-based sensor systems, installed at different heights monitoring the conditions in tropical dry forests over long periods of time. This paper presents our experience in deploying and maintaining these systems, retrieving and pre-processing the data, and describes the Web portal developed to help with data management, visualization and analysis.

Mario A. Nascimento

2011-06-01

199

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

200

Integration of unattended ground sensors into the tactical radio communications architecture  

Science.gov (United States)

Unattended Ground Sensors (UGS) have recently gained momentum in the military for applications such as force protection and perimeter surveillance. Many of these unattended ground sensors are deployed in theater today across multiple divisions of the military. In addition to UGS needs, there is a growing need for communication capabilities down to the individual soldier. The majority of UGS systems require specialized devices to monitor intrusion activities. This causes added burden to the soldiers who have to carry a multitude of equipment for a particular mission. To eliminate the need for a specialized device, some systems send sensor data to an Intelligence Operations Center. However, even though an extra device has been eliminated, there are concerns with delays and latency to disseminate sensor data down to the reactionary force as actionable reports. The RF Communications Division of Harris Corporation has developed a family of UGS equipment that provides seamless integration with currently fielded tactical communications architectures. This paper provides an overview of how this equipment eliminates the need of a separate monitoring device by providing direct actionable intelligence to a reactionary force to already fielded tactical radios as well as enhanced situational awareness up through the Tactical Radio Communications Architecture.

Cahill, Michael T.; Sasaki, Hironori M.

2008-04-01

 
 
 
 
201

Data Optical Networking Architecture Using Wavelength-Division Multiplexing Method for Optical Sensors  

Science.gov (United States)

Recently there has been a growth in the number of fiber optical sensors used for health monitoring in the hostile environment of commercial aircraft. Health monitoring to detect the onset of failure in structural systems from such causes as corrosion, stress corrosion cracking, and fatigue is a critical factor in safety as well in aircraft maintenance costs. This report presents an assessment of an analysis model of optical data networking architectures used for monitoring data signals among these optical sensors. Our model is focused on the design concept of the wavelength-division multiplexing (WDM) method since most of the optical sensors deployed in the aircraft for health monitoring typically operate in a wide spectrum of optical wavelengths from 710 to 1550 nm.

Nguyen, Hung D.

2008-01-01

202

CMOS pixel sensor development: a fast read-out architecture with integrated zero suppression  

International Nuclear Information System (INIS)

CMOS Monolithic Active Pixel Sensors (MAPS) have demonstrated their strong potential for tracking devices, particularly for flavour tagging. They are foreseen to equip several vertex detectors and beam telescopes. Most applications require high read-out speed, which imposes sensors to feature digital output with integrated zero suppression. The most recent development of MAPS at IPHC and IRFU addressing this issue will be reviewed. The design architecture, combining pixel array, column-level discriminators and zero suppression circuits, will be presented. Each pixel features a preamplifier and a correlated double sampling (CDS) micro-circuit reducing the temporal and fixed pattern noises. The sensor is fully programmable and can be monitored. It will equip experimental apparatus starting data taking in 2009/2010.

203

Architecture and applications of a high resolution gated SPAD image sensor.  

Science.gov (United States)

We present the architecture and three applications of the largest resolution image sensor based on single-photon avalanche diodes (SPADs) published to date. The sensor, fabricated in a high-voltage CMOS process, has a resolution of 512 × 128 pixels and a pitch of 24 ?m. The fill-factor of 5% can be increased to 30% with the use of microlenses. For precise control of the exposure and for time-resolved imaging, we use fast global gating signals to define exposure windows as small as 4 ns. The uniformity of the gate edges location is ?140 ps (FWHM) over the whole array, while in-pixel digital counting enables frame rates as high as 156 kfps. Currently, our camera is used as a highly sensitive sensor with high temporal resolution, for applications ranging from fluorescence lifetime measurements to fluorescence correlation spectroscopy and generation of true random numbers. PMID:25090572

Burri, Samuel; Maruyama, Yuki; Michalet, Xavier; Regazzoni, Francesco; Bruschini, Claudio; Charbon, Edoardo

2014-07-14

204

Architecture and methods for UAV-based heterogeneous sensor network applications  

Science.gov (United States)

Wireless sensor netwoks (WSN) employ miniaturized devices which integrate sensing, processing, and communication capabilities. In this paper an innovative mobile platform for heterogeneous sensor networks is presented, combined with adaptive methods to optimize the communication architecture for novel potential applications even in coastal and marine environment monitoring. In fact, in the near future, WSN 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. This procedure is here applied 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 remote sensing of the ocean, sea ice, coastal waters, and large water regions.

Antonio, Pedro; Caputo, Davide; Gandelli, Alessandro; Grimaccia, Francesco; Mussetta, Marco

2012-09-01

205

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.

James D. Carswell

2013-03-01

206

A wireless soil moisture smart sensor web using physics-based optimal control: Concept and initial demonstrations  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper introduces a new concept for a smart wireless sensor web technology for optimal measurements of surface-to-depth profiles of soil moisture using in-situ sensors. The objective of the technology, supported by the NASA Earth Science Technology Office Advanced Information Systems Technology program, is to enable a guided and adaptive sampling strategy for the in-situ sensor network to meet the measurement validation objectives of spaceborne soil moisture sensors. A potential applicati...

Moghaddam, Mahta; Entekhabi, Dara; Goykhman, Yuriy; Li, Ke; Liu, Mingyan; Mahajan, Aditya; Nayyar, Ashutosh; Shuman, David; Teneketzis, Demosthenis

2010-01-01

207

Plasma modified carbon surfaces for supporting sensor architectures  

Science.gov (United States)

Carbon possesses a number of properties that make it ideal for use in sensor and electrical applications. Using radio frequency plasma with various precursor gases it is possible to prepare carbon surfaces for further molecular attachment or functionalisation. Research in our laboratory has involved studies of plasma fluorination, hydrogenation and methanation of highly ordered pyrolytic graphite (HOPG) (as it serves as a highly ordered, single crystal, model substrate for other more complex forms of carbon), glassy carbon in the form of pyrolysed photoresist films (PPF) and single-walled carbon nanotubes (SWCNTs). Treated surfaces have been characterised using a variety of investigatory surface techniques. In this article we report on results obtained using X-ray Photoelectron Spectroscopy (XPS) for probing the chemical nature of the surface and hence the extent of treatment; Time of Flight Secondary-Ion Mass Spectrometry (ToFSIMS) has been utilised to examine the molecular surface structure and in particular, determine the extent of surface hydrogenation; Scanning Tunnelling Microscopy (STM) measurements provide information on the morphology of treated surfaces, in particular the damage and change in surface structures caused by various plasma treatments. We show in this work that the morphology, mechanisms and extent of modification of the plasma-modified surface obtained is strongly influenced by various experimental conditions. For instance, etching and/or nucleation and growth features are observed, with the type of features and their distribution strongly dependent on the precursor gas that is used to support the plasma. Other important parameters are operating pressure, RF power and exposure time.

Quinton, J. S.; Deslandes, A.; Barlow, A.; Shapter, J. G.

2007-01-01

208

Web-based sensor streaming wearable for respiratory monitoring applications.  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This paper presents a system for remote monitoring of respiration of individuals that can detect respiration rate, mode of breathing and identify coughing events. It comprises a series of polymer fabric-sensors incorporated into a sports vest, a wearable data acquisition platform and a novel rich internet application (RIA) which together enable remote real-time monitoring of untethered wearable systems for respiratory rehabilitation. This system will, for the first time, ...

Rovira, Carlos; Coyle, Shirley; Corcoran, Brian; Ward, Tomas; Mccoy, Aaron; Stroiescu, Florin; Daly, Kieran; Diamond, Dermot

2011-01-01

209

Semantic web services for distributed intelligence  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This chapter presentsa semantic web services platform ready to integrate intelligent processing capabilities according to open systems architecture for condition based maintenance (OSA-CBM) architecture. This platform is part of a flexible communication infrastructure, nicknamed Dynaweb, where a generic wireless device is also being developed between novel sensors, smart PDAs and existing maintenance systems of companies.

Gilabert, Eduardo; Voisin, Alexandre

2010-01-01

210

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

211

A FPGA Embedded Web Server for Remote Monitoring and Control of Smart Sensors Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This article describes the implementation of a web server using an embedded Altera NIOS II IP core, a general purpose and configurable RISC processor which is embedded in a Cyclone FPGA. The processor uses the ?CLinux operating system to support a Boa web server of dynamic pages using Common Gateway Interface (CGI). The FPGA is configured to act like the master node of a network, and also to control and monitor a network of smart sensors or instruments. In order to develop a totally function...

Eduardo Magdaleno; Manuel Rodríguez; Fernando Pérez; David Hernández; Enrique García

2013-01-01

212

An Energy-Efficient and High-Quality Video Transmission Architecture in Wireless Video-Based Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Technological progress in the fields of Micro Electro-Mechanical Systems (MEMS and wireless communications and also the availability of CMOS cameras, microphones and small-scale array sensors, which may ubiquitously capture multimedia content from the field, have fostered the development of low-cost limited resources Wireless Video-based Sensor Networks (WVSN. With regards to the constraints of videobased sensor nodes and wireless sensor networks, a supporting video stream is not easy to implement with the present sensor network protocols. In this paper, a thorough architecture is presented for video transmission over WVSN called Energy-efficient and high-Quality Video transmission Architecture (EQV-Architecture. This architecture influences three layers of communication protocol stack and considers wireless video sensor nodes constraints like limited process and energy resources while video quality is preserved in the receiver side. Application, transport, and network layers are the layers in which the compression protocol, transport protocol, and routing protocol are proposed respectively, also a dropping scheme is presented in network layer. Simulation results over various environments with dissimilar conditions revealed the effectiveness of the architecture in improving the lifetime of the network as well as preserving the video quality.

Yasaman Samei

2008-08-01

213

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

International Nuclear Information System (INIS)

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

214

Architecture Supporting Discovery and Management of Heterogeneous Sensors for Smart System Using Generic Middleware  

Directory of Open Access Journals (Sweden)

Full Text Available This Smart environments, starting from smart home to more complex one like smart city, demand efficientinteroperation mechanism among different heterogeneous sensors including the discovery and themanagement of these devices. The diverse domains of applications also require interoperation amongthemselves. The middleware plays a key role to achieve this interoperation. The middleware is alsoresponsible for providing abstractions to the application interfaces and device sensing. In the currentarticle middleware architecture along with a method for efficient device interoperation by generating ageneric device attributes (GDA structure is presented. The middleware performs semantic analysis onthe content of the device attributes while performing the discovery and managing the device. It supports,efficient way of sensor discovery, management and posting of sensed data. Smart irrigation and firmingenvironment is considered as a use case here. The presented architecture is modular, based on objectoriented concept and generic in nature. This can be further extended for any smart system. A futureresearch scope of the proposed architecture is also discussed while concluding the article.

Soma Bandyopadhyay

2012-10-01

215

Rolled-up magnetic sensor: nanomembrane architecture for in-flow detection of magnetic objects.  

Science.gov (United States)

Detection and analysis of magnetic nanoobjects is a crucial task in modern diagnostic and therapeutic techniques applied to medicine and biology. Accomplishment of this task calls for the development and implementation of electronic elements directly in fluidic channels, which still remains an open and nontrivial issue. Here, we present a novel concept based on rolled-up nanotechnology for fabrication of multifunctional devices, which can be straightforwardly integrated into existing fluidic architectures. We apply strain engineering to roll-up a functional nanomembrane consisting of a magnetic sensor element based on [Py/Cu](30) multilayers, revealing giant magnetoresistance (GMR). The comparison of the sensor's characteristics before and after the roll-up process is found to be similar, allowing for a reliable and predictable method to fabricate high-quality ultracompact GMR devices. The performance of the rolled-up magnetic sensor was optimized to achieve high sensitivity to weak magnetic fields. We demonstrate that the rolled-up tube itself can be efficiently used as a fluidic channel, while the integrated magnetic sensor provides an important functionality to detect and respond to a magnetic field. The performance of the rolled-up magnetic sensor for the in-flow detection of ferromagnetic CrO(2) nanoparticles embedded in a biocompatible polymeric hydrogel shell is highlighted. PMID:21861498

Mönch, Ingolf; Makarov, Denys; Koseva, Radinka; Baraban, Larysa; Karnaushenko, Daniil; Kaiser, Claudia; Arndt, Karl-Friedrich; Schmidt, Oliver G

2011-09-27

216

Ground Optical Signal Processing Architecture for Contributing SSA Space Based Sensor Data  

Science.gov (United States)

The main objective of the DARPA program Orbit Outlook (O^2) is to improve the metric tracking and detection performance of the Space Situational Network (SSN) by adding a diverse low-cost network of contributing sensors to the Space Situational Awareness (SSA) mission. In order to accomplish this objective, not only must a sensor be in constant communication with a planning and scheduling system to process tasking requests, there must be an underlying framework to provide useful data products, such as angles only measurements. Existing optical signal processing implementations such as the Optical Processing Architecture at Lincoln (OPAL) are capable of converting mission data collections to angles only observations, but may be difficult for many users to obtain, support, and customize for low-cost missions and demonstration programs. The Ground Optical Signal Processing Architecture (GOSPA) will ingest raw imagery and telemetry data from a space based electro optical sensor and perform a background removal process to remove anomalous pixels, interpolate over bad pixels, and dominant temporal noise. After background removal, the streak end points and target centroids are located using a corner detection algorithm developed by Air Force Research Laboratory. These identified streak locations are then fused with the corresponding spacecraft telemetry data to determine the Right Ascension and Declination measurements with respect to time. To demonstrate the performance of GOSPA, non-rate tracking collections against a satellite in Geosynchronous Orbit are simulated from a visible optical imaging sensor in a polar Low Earth Orbit. Stars, noise and bad pixels are added to the simulated images based on look angles and sensor parameters. These collections are run through the GOSPA framework to provide angles- only measurements to the Air Force Research Laboratory Constrained Admissible Region Multiple Hypothesis Filter (CAR-MHF) in which an Initial Orbit Determination is performed and compared to truth data.

Koblick, D.; Klug, M.; Goldsmith, A.; Flewelling, B.; Jah, M.; Shanks, J.; Piña, R.

2014-09-01

217

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

2009-06-01

218

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

2011-01-01

219

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 purpos...

Milos Bogdanovic; Leonid Stoimenov; Sanja Bogdanovic-Dinic

2013-01-01

220

A web-based system for home monitoring of patients with Parkinson's disease using wearable sensors.  

Science.gov (United States)

This letter introduces MercuryLive, a platform to enable home monitoring of patients with Parkinson's disease (PD) using wearable sensors. MercuryLive contains three tiers: a resource-aware data collection engine that relies upon wearable sensors, web services for live streaming and storage of sensor data, and a web-based graphical user interface client with video conferencing capability. Besides, the platform has the capability of analyzing sensor (i.e., accelerometer) data to reliably estimate clinical scores capturing the severity of tremor, bradykinesia, and dyskinesia. Testing results showed an average data latency of less than 400 ms and video latency of about 200 ms with video frame rate of about 13 frames/s when 800 kb/s of bandwidth were available and we used a 40% video compression, and data feature upload requiring 1 min of extra time following a 10 min interactive session. These results indicate that the proposed platform is suitable to monitor patients with PD to facilitate the titration of medications in the late stages of the disease. PMID:21041152

Chen, Bor-Rong; Patel, Shyamal; Buckley, Thomas; Rednic, Ramona; McClure, Douglas J; Shih, Ludy; Tarsy, Daniel; Welsh, Matt; Bonato, Paolo

2011-03-01

 
 
 
 
221

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

Science.gov (United States)

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. PMID:23836643

van den Berg, Ewout; Candès, Emmanuel; Chinn, Garry; Levin, Craig; Olcott, Peter Demetri; Sing-Long, Carlos

2013-07-23

222

Next Generation RFID-Based Medical Service Management System Architecture in Wireless Sensor Network  

Science.gov (United States)

Radio Frequency Identification (RFID) and Wireless Sensor Network (WSN) are two important wireless technologies that have wide variety of applications and provide unlimited future potentials most especially in healthcare systems. RFID is used to detect presence and location of objects while WSN is used to sense and monitor the environment. Integrating RFID with WSN not only provides identity and location of an object but also provides information regarding the condition of the object carrying the sensors enabled RFID tag. However, there isn't any flexible and robust communication infrastructure to integrate these devices into an emergency care setting. An efficient wireless communication substrate for medical devices that addresses ad hoc or fixed network formation, naming and discovery, transmission efficiency of data, data security and authentication, as well as filtration and aggregation of vital sign data need to be study and analyze. This paper proposed an efficient next generation architecture for RFID-based medical service management system in WSN that possesses the essential elements of each future medical application that are integrated with existing medical practices and technologies in real-time, remote monitoring, in giving medication, and patient status tracking assisted by embedded wearable wireless sensors which are integrated in wireless sensor network.

Tolentino, Randy S.; Lee, Kijeong; Kim, Yong-Tae; Park, Gil-Cheol

223

An Architecture for Real-Time Interpretation and Visualization of Structural Sensor Data in a Laboratory Environment  

Science.gov (United States)

A visualization system is being developed out of the need to monitor, interpret, and make decisions based on the information from several thousand sensors during experimental testing to facilitate development and validation of structural health monitoring algorithms. As an added benefit the system will enable complete real-time sensor assessment of complex test specimens. Complex structural specimens are routinely tested that have hundreds or thousands of sensors. During a test, it is impossible for a single researcher to effectively monitor all the sensors and subsequently interesting phenomena occur that are not recognized until post-test analysis. The ability to detect and alert the researcher to these unexpected phenomena as the test progresses will significantly enhance the understanding and utilization of complex test articles. Utilization is increased by the ability to halt a test when the health monitoring algorithm response is not satisfactory or when an unexpected phenomenon occurs, enabling focused investigation potentially through the installation of additional sensors. Often if the test continues, structural changes make it impossible to reproduce the conditions that exhibited the phenomena. The prohibitive time and costs associated with fabrication, sensoring, and subsequent testing of additional test articles generally makes it impossible to further investigate the phenomena. A scalable architecture is described to address the complex computational demands of structural health monitoring algorithm development and laboratory experimental test monitoring. The researcher monitors the test using a photographic quality 3D graphical model with actual sensor locations identified. In addition, researchers can quickly activate plots displaying time or load versus selected sensor response along with the expected values and predefined limits. The architecture has several key features. First, distributed dissimilar computers may be seamlessly integrated into the information flow. Second, virtual sensors may be defined that are complex functions of existing sensors or other virtual sensors. Virtual sensors represent a calculated value not directly measured by particular physical instrument. They can be used, for example, to represent the maximum difference in a range of sensors or the calculated buckling load based on the current strains. Third, the architecture enables autonomous response to preconceived events, where by the system can be configured to suspend or abort a test if a failure is detected in the load introduction system. Fourth, the architecture is designed to allow cooperative monitoring and control of the test progression from multiple stations both remote and local to the test system. To illustrate the architecture, a preliminary implementation is described monitoring the Stitched Composite Wing recently tested at LaRC.

Doggett, William; Vazquez, Sixto

2000-01-01

224

A Unified Robotic Software Architecture for Service Robotics and Networks of Smart Sensors  

Science.gov (United States)

This paper proposes a novel architecture for the programming of multi-modal service robots and networked sensors. The presented software framework eases the development of high-level applications for distributed systems. The software architecture is based upon the Roblet-Technology, which is an exceptionally powerful medium in robotics. The possibility to develop, compile and execute an application on one workstation and distribute parts of a program based on the idea of mobile code is pointed out. Since the Roblet-Technology uses Java the development is independent of the operation system. The framework hides the network communication and therefore greatly improves the programming and testing of applications in service robotics. The concept is evaluated in the context of the service robot TASER of the TAMS Institute at the University of Hamburg. This robot consists of a mobile platform with two manipulators equipped with artificial hands. Several multimodal input and output devices for interaction round off the robot. Networked cameras in the working environment of TASER provide additional information to the robot. The integration of these smart sensors shows the extendability of the proposed concept to general distributed systems.

Westhoff, Daniel; Zhang, Jianwei

225

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

226

Rapid EHR development and implementation using web and cloud-based architecture in a large home health and hospice organization.  

Science.gov (United States)

Health care organizations have long been limited to a small number of major vendors in their selection of an electronic health record (EHR) system in the national and international marketplace. These major EHR vendors have in common base systems that are decades old, are built in antiquated programming languages, use outdated server architecture, and are based on inflexible data models [1,2]. The option to upgrade their technology to keep pace with the power of new web-based architecture, programming tools and cloud servers is not easily undertaken due to large client bases, development costs and risk [3]. This paper presents the decade-long efforts of a large national provider of home health and hospice care to select an EHR product, failing that to build their own and failing that initiative to go back into the market in 2012. The decade time delay had allowed new technologies and more nimble vendors to enter the market. Partnering with a new start-up company doing web and cloud based architecture for the home health and hospice market, made it possible to build, test and implement an operational and point of care system in 264 home health locations across 40 states and three time zones in the United States. This option of "starting over" with the new web and cloud technologies may be posing a next generation of new EHR vendors that retells the Blackberry replacement by iPhone story in healthcare. PMID:24943570

Weaver, Charlotte A; Teenier, Pamela

2014-01-01

227

Semantics of immersive web through its architectural structure and graphic primitives  

Directory of Open Access Journals (Sweden)

Full Text Available Currently, practices and tools for computer-aided three-dimensional design, do not allow the semantic description of objects constructed in some cases specified notations as handling layers, or labeling of each development itself. The lack of a standard for the description of the elements represents a major drawback for using advanced three-dimensional environments such as the automation of search and construction processes that require semantic knowledge of its elements.This project proposes the development the semantic composition from the hierarchy of three-dimensional visualization of graphics primitives used to construct three-dimensional objects, taking into account the geometric composition architecture of standard 19775-1 of the International Electrotechnical Commission of the International Organization for StandardizationFor the development of semantic composition use the methodology methontology proposed by the Universidad Politécnica de Madrid, because it allows the construction of ontologies about specific domains, limiting the domain by defining classes and subclasses, relationships and the generation of instances a framework for resource description on web ontology language.

Rubén González Crespo

2010-12-01

228

Objectively Optimized Observation Direction System Providing Situational Awareness for a Sensor Web  

Science.gov (United States)

There is great utility in having a flexible and automated objective observation direction system for the decadal survey missions and beyond. Such a system allows us to optimize the observations made by suite of sensors to address specific goals from long term monitoring to rapid response. We have developed such a prototype using a network of communicating software elements to control a heterogeneous network of sensor systems, which can have multiple modes and flexible viewing geometries. Our system makes sensor systems intelligent and situationally aware. Together they form a sensor web of multiple sensors working together and capable of automated target selection, i.e. the sensors “know” where they are, what they are able to observe, what targets and with what priorities they should observe. This system is implemented in three components. The first component is a Sensor Web simulator. The Sensor Web simulator describes the capabilities and locations of each sensor as a function of time, whether they are orbital, sub-orbital, or ground based. The simulator has been implemented using AGIs Satellite Tool Kit (STK). STK makes it easy to analyze and visualize optimal solutions for complex space scenarios, and perform complex analysis of land, sea, air, space assets, and shares results in one integrated solution. The second component is target scheduler that was implemented with STK Scheduler. STK Scheduler is powered by a scheduling engine that finds better solutions in a shorter amount of time than traditional heuristic algorithms. The global search algorithm within this engine is based on neural network technology that is capable of finding solutions to larger and more complex problems and maximizing the value of limited resources. The third component is a modeling and data assimilation system. It provides situational awareness by supplying the time evolution of uncertainty and information content metrics that are used to tell us what we need to observe and the priority we should give to the observations. A prototype of this component was implemented with AutoChem. AutoChem is NASA release software constituting an automatic code generation, symbolic differentiator, analysis, documentation, and web site creation tool for atmospheric chemical modeling and data assimilation. Its model is explicit and uses an adaptive time-step, error monitoring time integration scheme for stiff systems of equations. AutoChem was the first model to ever have the facility to perform 4D-Var data assimilation and Kalman filter. The project developed a control system with three main accomplishments. First, fully multivariate observational and theoretical information with associated uncertainties was combined using a full Kalman filter data assimilation system. Second, an optimal distribution of the computations and of data queries was achieved by utilizing high performance computers/load balancing and a set of automatically mirrored databases. Third, inter-instrument bias correction was performed using machine learning. The PI for this project was Dr. David Lary of the UMBC Joint Center for Earth Systems Technology at NASA/Goddard Space Flight Center.

Aulov, O.; Lary, D. J.

2010-12-01

229

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.

Yogesh Rai

2011-09-01

230

The ARCOMEM Architecture for Social- and Semantic-Driven Web Archiving  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The constantly growing amount ofWeb content and the success of the SocialWeb lead to increasing needs for Web archiving. These needs go beyond the pure preservationo of Web pages. Web archives are turning into “community memories” that aim at building a better understanding of the public view on, e.g., celebrities, court decisions and other events. Due to the size of the Web, the traditional “collect-all” strategy is in many cases not the best method to build Web archives. In this pap...

Thomas Risse.; Elena Demidova; Stefan Dietze; Wim Peters; Nikolaos Papailiou; Katerina Doka; Yannis Stavrakas; Vassilis Plachouras; Pierre Senellart; Florent Carpentier; Amin Mantrach; Bogdan Cautis; Patrick Siehndel; Dimitris Spiliotopoulos

2014-01-01

231

A Java-based enterprise system architecture for implementing a continuously supported and entirely Web-based exercise solution.  

Science.gov (United States)

Since machine-based exercise still uses local facilities, it is affected by time and place. We designed a web-based system architecture based on the Java 2 Enterprise Edition that can accomplish continuously supported machine-based exercise. In this system, exercise programs and machines are loosely coupled and dynamically integrated on the site of exercise via the Internet. We then extended the conventional health promotion model, which contains three types of players (users, exercise trainers, and manufacturers), by adding a new player: exercise program creators. Moreover, we developed a self-describing strategy to accommodate a variety of exercise programs and provide ease of use to users on the web. We illustrate our novel design with examples taken from our feasibility study on a web-based cycle ergometer exercise system. A biosignal-based workload control approach was introduced to ensure that users performed appropriate exercise alone. PMID:16617629

Wang, Zhihui; Kiryu, Tohru

2006-04-01

232

Next-Generation Real-Time Geodetic Station Sensor Web for Natural Hazards Research and Applications  

Science.gov (United States)

We report on a NASA AIST project focused on better forecasting, assessing, and mitigating natural hazards, including earthquakes, tsunamis, and extreme storms and flooding through development and implementation of a modular technology for the next-generation in-situ geodetic station, and a Geodetic Sensor Web to support the flow of information from multiple stations to scientists, mission planners, decision makers, and first responders. Meaningful warnings save lives when issued within 1-2 minutes for destructive earthquakes, several tens of minutes for tsunamis, and up to several hours for extreme storms and flooding, and can be provided by on-site fusion of multiple data types and generation of higher-order data products: GPS and accelerometer measurements to estimate point displacements, and GPS and meteorological measurements to estimate moisture variability in the free atmosphere. By operating semi-autonomously, each station can provide low-latency, high-fidelity and compact data products within the constraints of narrow communications bandwidth that often accompanies natural disasters. The project encompasses the following tasks, including hardware and software components: (1) Development of a power-efficient, low-cost, plug-in Geodetic Module for fusion of data from in situ sensors including GPS, a MEMS accelerometer package, and a MEMS meteorological sensor package, for deployment at 26 existing continuous GPS stations in southern California. The low-cost modular design is scalable to the many existing continuous GPS stations worldwide. (2) Estimation of new on-the-fly data products with 1 mm precision and accuracy, including three-dimensional broadband displacements and precipitable water, by new software embedded in the Geodetic Module's processor, rather than at a central processing facility. (3) Development of a Geodetic Sensor Web to allow the semi-autonomous sensors to transmit and receive information in real time by means of redundant sensor proxy servers and message broker networks to allow for robust sensor control, flow of data, data products, models and alarms, and to avoid single points of failure during emergencies. The team from SIO and JPL is working with users at the two National Weather Service Weather Forecast Offices in southern California (San Diego and Los Angeles/Oxnard) and NOAA's Earth System Research Laboratory in Boulder to provide tropospheric signal delays and precipitable water vapor estimates for forecasting severe storms and flooding. Broadband displacements for earthquake and tsunami early warning and rapid response are being made available to users in the geophysics community through the Southern California Earthquake Data Center at Caltech.

Bock, Y.; Clayton, R. W.; Fang, P.; Geng, J.; Gutman, S. I.; Kedar, S.; Laber, J. L.; Moore, A. W.; Owen, S. E.; Small, I.; Squibb, M. B.; Webb, F.; Yu, E.

2012-12-01

233

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

2012-04-01

234

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

2011-07-01

235

Evolving Wireless Sensor Network Behavior Through Adaptability Points in Middleware Architectures  

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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.

Sam Michiels

2011-08-01

236

Coastal Ocean Observing Network - Open Source Architecture for Data Management and Web-Based Data Services  

Science.gov (United States)

The observations from the oceans are the backbone for any kind of operational services, viz. potential fishing zone advisory services, ocean state forecast, storm surges, cyclones, monsoon variability, tsunami, etc. Though it is important to monitor open Ocean, it is equally important to acquire sufficient data in the coastal ocean through coastal ocean observing systems for re-analysis, analysis and forecast of coastal ocean by assimilating different ocean variables, especially sub-surface information; validation of remote sensing data, ocean and atmosphere model/analysis and to understand the processes related to air-sea interaction and ocean physics. Accurate information and forecast of the state of the coastal ocean at different time scales is vital for the wellbeing of the coastal population as well as for the socio-economic development of the country through shipping, offshore oil and energy etc. Considering the importance of ocean observations in terms of understanding our ocean environment and utilize them for operational oceanography, a large number of platforms were deployed in the Indian Ocean including coastal observatories, to acquire data on ocean variables in and around Indian Seas. The coastal observation network includes HF Radars, wave rider buoys, sea level gauges, etc. The surface meteorological and oceanographic data generated by these observing networks are being translated into ocean information services through analysis and modelling. Centralized data management system is a critical component in providing timely delivery of Ocean information and advisory services. In this paper, we describe about the development of open-source architecture for real-time data reception from the coastal observation network, processing, quality control, database generation and web-based data services that includes on-line data visualization and data downloads by various means.

Pattabhi Rama Rao, E.; Venkat Shesu, R.; Udaya Bhaskar, T. V. S.

2012-07-01

237

A FPGA Embedded Web Server for Remote Monitoring and Control of Smart Sensors Networks  

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Full Text Available This article describes the implementation of a web server using an embedded Altera NIOS II IP core, a general purpose and configurable RISC processor which is embedded in a Cyclone FPGA. The processor uses the ?CLinux operating system to support a Boa web server of dynamic pages using Common Gateway Interface (CGI. The FPGA is configured to act like the master node of a network, and also to control and monitor a network of smart sensors or instruments. In order to develop a totally functional system, the FPGA also includes an implementation of the time-triggered protocol (TTP/A. Thus, the implemented master node has two interfaces, the webserver that acts as an Internet interface and the other to control the network. This protocol is widely used to connecting smart sensors and actuators and microsystems in embedded real-time systems in different application domains, e.g., industrial, automotive, domotic, etc., although this protocol can be easily replaced by any other because of the inherent characteristics of the FPGA-based technology.

Eduardo Magdaleno

2013-12-01

238

Modular extracellular sensor architecture for engineering mammalian cell-based devices.  

Science.gov (United States)

Engineering mammalian cell-based devices that monitor and therapeutically modulate human physiology is a promising and emerging frontier in clinical synthetic biology. However, realizing this vision will require new technologies enabling engineered circuitry to sense and respond to physiologically relevant cues. No existing technology enables an engineered cell to sense exclusively extracellular ligands, including proteins and pathogens, without relying upon native cellular receptors or signal transduction pathways that may be subject to crosstalk with native cellular components. To address this need, we here report a technology we term a Modular Extracellular Sensor Architecture (MESA). This self-contained receptor and signal transduction platform is maximally orthogonal to native cellular processes and comprises independent, tunable protein modules that enable performance optimization and straightforward engineering of novel MESA that recognize novel ligands. We demonstrate ligand-inducible activation of MESA signaling, optimization of receptor performance using design-based approaches, and generation of MESA biosensors that produce outputs in the form of either transcriptional regulation or transcription-independent reconstitution of enzymatic activity. This systematic, quantitative platform characterization provides a framework for engineering MESA to recognize novel ligands and for integrating these sensors into diverse mammalian synthetic biology applications. PMID:24611683

Daringer, Nichole M; Dudek, Rachel M; Schwarz, Kelly A; Leonard, Joshua N

2014-12-19

239

New architecture of tunable mechanical monolithic horizontal sensor for low frequency seismic noise measurement  

Science.gov (United States)

This paper describes a new mechanical architecture of the monolithic tunable folded pendulum, developed at the University of Salerno, configurable both as seismometer and, in a force-feedback configuration, as accelerometer. Typical applications are the remote monitoring of seismic and newtonian noises for geophysical applications. This sensor, shaped with precision machining and electric-discharge-machining, like the previous versions, is a very compact instrument, very sensitive in the low-frequency seismic noise band, with a very good immunity to environmental noises. Important characteristics are the large band (10-6 - 10mHz), the tunability of the resonance frequency and the laser optical readout, that integrates an optical lever and a laser interferometer. The theoretical sensitivity curves, largely improved due to a new design of the pendulum arms and of the electronics, are in a very good agreement with the measurements. In particular, a very good sensitivity (10-12 m/Hz1/2) has been obtained in the band 0.1 - 10 Hz). Prototypes of monolithic seismometers are already operational in selected sites around the world both to remotely acquire data for scientific analysis of seismic noise and to collect all the useful information to understand their performances in the very low frequency band. The results of the monolithic sensor as accelerometer (force feed-back configuration) are also presented and discussed.

Acernese, Fausto; Giordano, Gerardo; De Rosa, Rosario; Romano, Rocco; Vilasi, Silvia; Barone, Fabrizio

2010-10-01

240

SoyBase Simple Semantic Web Architecture and Protocol (SSWAP) Services  

Science.gov (United States)

Semantic web technologies offer the potential to link internet resources and data by shared concepts without having to rely on absolute lexical matches. Thus two web sites or web resources which are concerned with similar data types could be identified based on similar semantics. In the biological...

 
 
 
 
241

A robust hybrid VLSI neural network architecture for a smart optical sensor  

Science.gov (United States)

This thesis introduces a novel approach to the design of circuits found in a very large scale integration (VLSI) implementation of an artificial neural network. A robust hybrid architecture with analog and digital elements has been developed for a fully-parallel single-chip realization of multilayer neural networks. The proposed architecture is highly modular and creates regular silicon structures that well suit a VLSI realization. The architecture employs an innovative universal building block consisting of an improved digital-analog multiplier, a new analog active nonlinear resistor and a digital weight register. The key circuit called a unified synapse-neuron allows one to realize a self-scaling sigmoidal neuron characteristic that does not have to be constantly redesigned to accommodate a varying dynamic input range that is dependent upon the number of synaptic weights connected to the input of the neuron. The effects of synaptic weight quantization noise are also shown to be reduced using a stochastic model developed in the thesis. A new resistive-type neuron circuit is presented that exhibits inherently low characteristic variations based on analyses, simulations and fabrication measurements. Moreover, as each neuron is realized by a number of compact sub-neurons that are distributed over the die area, the effects of process variations on the neuron's characteristics are minimized due to the distributed averaging effect that takes place. Increased robustness is achieved as there is a simultaneous reduction of both digital quantization effects and analog variation effects. The distributed nature of the analog neuron also has the potential to contribute to increased fault tolerance for certain types of neuron circuit failure. Circuit design, implementation and characterization are performed in a standard CMOS process at 5V and 3.3V supply voltages so as to lead to an optimized design. The purpose for this research was to develop a smart non-contact optical sensor based on a programmable neural network with an integrated photosensitive array. The theoretical and experimental work has lead to the design and realization of a highly modular and robust neural-based smart CMOS sensor with reduced interconnection areas and increased synaptic density. As a result, a larger photosensor array and a larger neural network classifier are implemented on a restricted die area. Both theoretical and experimental results are presented in the thesis.

Djahanshahi, Hormoz

242

A survey of system architecture requirements for health care-based wireless sensor networks.  

Science.gov (United States)

Wireless Sensor Networks (WSNs) have emerged as a viable technology for a vast number of applications, including health care applications. To best support these health care applications, WSN technology can be adopted for the design of practical Health Care WSNs (HCWSNs) that support the key system architecture requirements of reliable communication, node mobility support, multicast technology, energy efficiency, and the timely delivery of data. Work in the literature mostly focuses on the physical design of the HCWSNs (e.g., wearable sensors, in vivo embedded sensors, et cetera). However, work towards enhancing the communication layers (i.e., routing, medium access control, et cetera) to improve HCWSN performance is largely lacking. In this paper, the information gleaned from an extensive literature survey is shared in an effort to fortify the knowledge base for the communication aspect of HCWSNs. We highlight the major currently existing prototype HCWSNs and also provide the details of their routing protocol characteristics. We also explore the current state of the art in medium access control (MAC) protocols for WSNs, for the purpose of seeking an energy efficient solution that is robust to mobility and delivers data in a timely fashion. Furthermore, we review a number of reliable transport layer protocols, including a network coding based protocol from the literature, that are potentially suitable for delivering end-to-end reliability of data transmitted in HCWSNs. We identify the advantages and disadvantages of the reviewed MAC, routing, and transport layer protocols as they pertain to the design and implementation of a HCWSN. The findings from this literature survey will serve as a useful foundation for designing a reliable HCWSN and also contribute to the development and evaluation of protocols for improving the performance of future HCWSNs. Open issues that required further investigations are highlighted. PMID:22163881

Egbogah, Emeka E; Fapojuwo, Abraham O

2011-01-01

243

Implementation and Performance of a GPS/INS Tightly Coupled Assisted PLL Architecture Using MEMS Inertial Sensors  

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Full Text Available The use of global navigation satellite system receivers for navigation still presents many challenges in urban canyon and indoor environments, where satellite availability is typically reduced and received signals are attenuated. To improve the navigation performance in such environments, several enhancement methods can be implemented. For instance, external aid provided through coupling with other sensors has proven to contribute substantially to enhancing navigation performance and robustness. Within this context, coupling a very simple GPS receiver with an Inertial Navigation System (INS based on low-cost micro-electro-mechanical systems (MEMS inertial sensors is considered in this paper. In particular, we propose a GPS/INS Tightly Coupled Assisted PLL (TCAPLL architecture, and present most of the associated challenges that need to be addressed when dealing with very-low-performance MEMS inertial sensors. In addition, we propose a data monitoring system in charge of checking the quality of the measurement flow in the architecture. The implementation of the TCAPLL is discussed in detail, and its performance under different scenarios is assessed. Finally, the architecture is evaluated through a test campaign using a vehicle that is driven in urban environments, with the purpose of highlighting the pros and cons of combining MEMS inertial sensors with GPS over GPS alone.

Youssef Tawk

2014-02-01

244

Implementation and performance of a GPS/INS tightly coupled assisted PLL architecture using MEMS inertial sensors.  

Science.gov (United States)

The use of global navigation satellite system receivers for navigation still presents many challenges in urban canyon and indoor environments, where satellite availability is typically reduced and received signals are attenuated. To improve the navigation performance in such environments, several enhancement methods can be implemented. For instance, external aid provided through coupling with other sensors has proven to contribute substantially to enhancing navigation performance and robustness. Within this context, coupling a very simple GPS receiver with an Inertial Navigation System (INS) based on low-cost micro-electro-mechanical systems (MEMS) inertial sensors is considered in this paper. In particular, we propose a GPS/INS Tightly Coupled Assisted PLL (TCAPLL) architecture, and present most of the associated challenges that need to be addressed when dealing with very-low-performance MEMS inertial sensors. In addition, we propose a data monitoring system in charge of checking the quality of the measurement flow in the architecture. The implementation of the TCAPLL is discussed in detail, and its performance under different scenarios is assessed. Finally, the architecture is evaluated through a test campaign using a vehicle that is driven in urban environments, with the purpose of highlighting the pros and cons of combining MEMS inertial sensors with GPS over GPS alone. PMID:24569773

Tawk, Youssef; Tomé, Phillip; Botteron, Cyril; Stebler, Yannick; Farine, Pierre-André

2014-01-01

245

Web-Based Architecture to Enable Compute-Intensive CAD Tools and Multi-user Synchronization in Teleradiology  

Science.gov (United States)

Teleradiology is the electronic transmission of radiological patient images, such as x-rays, CT, or MR across multiple locations. The goal could be interpretation, consultation, or medical records keeping. Information technology solutions have enabled electronic records and their associated benefits are evident in health care today. However, salient aspects of collaborative interfaces, and computer assisted diagnostic (CAD) tools are yet to be integrated into workflow designs. The Computer Assisted Diagnostics and Interventions (CADI) group at the University at Buffalo has developed an architecture that facilitates web-enabled use of CAD tools, along with the novel concept of synchronized collaboration. The architecture can support multiple teleradiology applications and case studies are presented here.

Mehta, Neville; Kompalli, Suryaprakash; Chaudhary, Vipin

246

Layered Ontological Modelling for Web Service-oriented Model-Driven Architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Modelling is recognised as an essential activity in the architectural design of software systems. Model-driven architecture (MDA) is a framework implementing this idea. Ontologies are knowledge representation frameworks that are ideally suited to support modelling in this endeavour. We propose here a layered ontological framework that addresses domain modelling, architectural modelling, and interoperability aspects in the development of service-based software systems. We ...

Pahl, Claus

2005-01-01

247

A Flexible Tool for Web Service Selection in Service Oriented Architecture  

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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

2011-12-01

248

Comparison of the Rest Architectural Style with Soap in Implementation of Modern Web Services  

Digital Repository Infrastructure Vision for European Research (DRIVER)

One of the most relevant steps in the development of an information system during implementation of web services is moving the existing program functionality onto the web. Although web services have been advancing together with software, implementation requires special attention. Accessible options allow organisations to search for alternatives that would suit their needs, i.e. would be cheaper and more effective as well as possibly easier and faster to implement. The paper aims to compare...

K?stutis Stankevi?ius

2013-01-01

249

A Proxy Design to Leverage the Interconnection of CoAP Wireless Sensor Networks with Web Applications  

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Full Text Available In this paper, we present the design of a Constrained Application Protocol (CoAP proxy able to interconnect Web applications based on Hypertext Transfer Protocol (HTTP and WebSocket with CoAP based Wireless Sensor Networks. Sensor networks are commonly used to monitor and control physical objects or environments. Smart Cities represent applications of such a nature. Wireless Sensor Networks gather data from their surroundings and send them to a remote application. This data flow may be short or long lived. The traditional HTTP long-polling used by Web applications may not be adequate in long-term communications. To overcome this problem, we include the WebSocket protocol in the design of the CoAP proxy. We evaluate the performance of the CoAP proxy in terms of latency and memory consumption. The tests consider long and short-lived communications. In both cases, we evaluate the performance obtained by the CoAP proxy according to the use of WebSocket and HTTP long-polling.

Alessandro Ludovici

2015-01-01

250

A Proxy Design to Leverage the Interconnection of CoAP Wireless Sensor Networks with Web Applications.  

Science.gov (United States)

In this paper, we present the design of a Constrained Application Protocol (CoAP) proxy able to interconnect Web applications based on Hypertext Transfer Protocol (HTTP) and WebSocket with CoAP based Wireless Sensor Networks. Sensor networks are commonly used to monitor and control physical objects or environments. Smart Cities represent applications of such a nature. Wireless Sensor Networks gather data from their surroundings and send them to a remote application. This data flow may be short or long lived. The traditional HTTP long-polling used by Web applications may not be adequate in long-term communications. To overcome this problem, we include the WebSocket protocol in the design of the CoAP proxy. We evaluate the performance of the CoAP proxy in terms of latency and memory consumption. The tests consider long and short-lived communications. In both cases, we evaluate the performance obtained by the CoAP proxy according to the use of WebSocket and HTTP long-polling. PMID:25585107

Ludovici, Alessandro; Calveras, Anna

2015-01-01

251

Life Under Your Feet: An End-to-End Soil Ecology Sensor Network, Database, Web Server, and Analysis Service  

CERN Document Server

Wireless sensor networks can revolutionize soil ecology by providing measurements at temporal and spatial granularities previously impossible. This paper presents a soil monitoring system we developed and deployed at an urban forest in Baltimore as a first step towards realizing this vision. Motes in this network measure and save soil moisture and temperature in situ every minute. Raw measurements are periodically retrieved by a sensor gateway and stored in a central database where calibrated versions are derived and stored. The measurement database is published through Web Services interfaces. In addition, analysis tools let scientists analyze current and historical data and help manage the sensor network. The article describes the system design, what we learned from the deployment, and initial results obtained from the sensors. The system measures soil factors with unprecedented temporal precision. However, the deployment required device-level programming, sensor calibration across space and time, and cross...

Szlavecz, K; Ozer, S; Musaloiu-E, R; Cogan, J; Small, S; Burns, R; Gray, J; Szalay, A S; Szlavecz, Katalin; Terzis, Andreas; Ozer, Stuart; Musaloiu-E, Razvan; Cogan, Joshua; Small, Sam; Burns, Randal; Gray, Jim; Szalay, Alex

2007-01-01

252

Migrating EO/IR sensors to cloud-based infrastructure as service architectures  

Science.gov (United States)

The Night Vision Image Generator (NVIG), a product of US Army RDECOM CERDEC NVESD, is a visualization tool used widely throughout Army simulation environments to provide fully attributed synthesized, full motion video using physics-based sensor and environmental effects. The NVIG relies heavily on contemporary hardware-based acceleration and GPU processing techniques, which push the envelope of both enterprise and commodity-level hypervisor support for providing virtual machines with direct access to hardware resources. The NVIG has successfully been integrated into fully virtual environments where system architectures leverage cloudbased technologies to various extents in order to streamline infrastructure and service management. This paper details the challenges presented to engineers seeking to migrate GPU-bound processes, such as the NVIG, to virtual machines and, ultimately, Cloud-Based IAS architectures. In addition, it presents the path that led to success for the NVIG. A brief overview of Cloud-Based infrastructure management tool sets is provided, and several virtual desktop solutions are outlined. A discrimination is made between general purpose virtual desktop technologies compared to technologies that expose GPU-specific capabilities, including direct rendering and hard ware-based video encoding. Candidate hypervisor/virtual machine configurations that nominally satisfy the virtualized hardware-level GPU requirements of the NVIG are presented , and each is subsequently reviewed in light of its implications on higher-level Cloud management techniques. Implementation details are included from the hardware level, through the operating system, to the 3D graphics APls required by the NVIG and similar GPU-bound tools.

Berglie, Stephen T.; Webster, Steven; May, Christopher M.

2014-06-01

253

SAMuS: service-oriented architecture for multisensor surveillance in smart homes.  

Science.gov (United States)

The design of a service-oriented architecture for multisensor surveillance in smart homes is presented as an integrated solution enabling automatic deployment, dynamic selection, and composition of sensors. Sensors are implemented as Web-connected devices, with a uniform Web API. RESTdesc is used to describe the sensors and a novel solution is presented to automatically compose Web APIs that can be applied with existing Semantic Web reasoners. We evaluated the solution by building a smart Kinect sensor that is able to dynamically switch between IR and RGB and optimizing person detection by incorporating feedback from pressure sensors, as such demonstrating the collaboration among sensors to enhance detection of complex events. The performance results show that the platform scales for many Web APIs as composition time remains limited to a few hundred milliseconds in almost all cases. PMID:24778579

Van Hoecke, Sofie; Verborgh, Ruben; Van Deursen, Davy; Van de Walle, Rik

2014-01-01

254

A Collaborative Web-Based Architecture For Sharing ToxCast Data  

Science.gov (United States)

Collaborative Drug Discovery (CDD) has created a scalable platform that combines traditional drug discovery informatics with Web2.0 features. Traditional drug discovery capabilities include substructure, similarity searching and export to excel or sdf formats. Web2.0 features inc...

255

Very Low-Memory Wavelet Compression Architecture Using Strip-Based Processing for Implementation in Wireless Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Abstract This paper presents a very low-memory wavelet compression architecture for implementation in severely constrained hardware environments such as wireless sensor networks (WSNs). The approach employs a strip-based processing technique where an image is partitioned into strips and each strip is encoded separately. To further reduce the memory requirements, the wavelet compression uses a modified set-partitioning in hierarchical trees (SPIHT) algorithm based on a degree-0 zerot...

Kah Phooi Seng; Li-minn Ang; Wai Chong Chia; Li Wern Chew

2009-01-01

256

The GPS Analysis Package for Exploration and Understanding of Geodetic Sensor Web Time Series Data  

Science.gov (United States)

We introduce the GPS Analysis Package (GAP), a Matlab toolbox for GPS data exploration and understanding. The toolbox is designed to support scientists and engineers studying the motion of the solid Earth both in an academic environment and in the course of NASA missions such as UAVSAR and future InSAR satellite missions. It includes an ensemble of low-level routines to perform basic signal processing operations, such as removal of secular motion, de-noising, and removal of seasonal signals. It also includes a suite of more sophisticated statistical pattern recognition techniques, including hidden Markov models and Bayes nets, to detect changes, identify transient signals, understand regional motion, and uncover relationships between geographically removed nodes in the GPS network. Finally, it provides an assortment of methods for estimating missing observations in the network. We provide usage examples of the package applied to particular scenarios, including the 2010 El Mayor-Cucapah earthquake, the 2011 Tohoku-Oki earthquake, and ongoing slow slip events in the Cascadia region. We also demonstrate the utility of the package within a web portal and web services environment by showcasing its use in the QuakeSim web portal. The QuakeSim portal allows easy access to GPS data sources provided by multiple institutions as well as a map and plotting interface to quickly assess analysis results. Finally, we show the extensibility of the package to other problem domains and sensor network data sources, demonstrating the analysis tools as applied to seismic network data, autonomous robotic navigation, and fault detection in engineering data streams from the International Space Station.

Granat, R. A.; Moghaddam, B.; Donnellan, A.

2012-12-01

257

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

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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

2013-08-01

258

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

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Full Text Available 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.

Seokhoon Yoon

2013-07-01

259

Ocean Color Web: Integrating the Scientific Community With a Measurement-Based, Multi-Sensor Data Processing and Distribution System  

Science.gov (United States)

The Ocean Color Web http://oceancolor.gsfc.nasa.gov was developed and is maintained by the Ocean Biology Processing Group (OBPG) at NASA's Goddard Space Flight Center as a means for disseminating information and data in support of NASA's Ocean Color program. The OBPG is responsible for the processing, validation, and distribution of Ocean Color and SST data from MODIS, and Ocean Color data from SeaWiFS, OCTS, and CZCS. The Ocean Color web is the public interface to a fully automated data system for acquisition, processing, analysis, and distribution of data from these spaceborne sensors. Key features include web and ftp-based data access, timely availability of data products, data subscription services, parameter and regional subsetting, image support for field campaigns, extensive documentation, and user support forums. This paper presents an overview of the valuable Ocean Color Web resources that allow the scientific community to browse, download, and analyze Ocean Color and SST data from multiple satellites.

Thomas, D. G.; Bailey, S. W.; Kuring, N.; Feldman, G. C.; McClain, C. R.; Franz, B. A.; Wilding, J.

2005-12-01

260

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 wel...

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

2008-01-01

 
 
 
 
261

Field-programmable gate array-based hardware architecture for image processing with complementary metal-oxide-semiconductor image sensor  

Science.gov (United States)

We present a field-programmable gate array (FPGA)-based hardware architecture for image processing as well as novel algorithms for fast autoexposure control and color filter array (CFA) demosaicing utilizing a CMOS image sensor (CIS). The proposed hardware architecture includes basic color processing functions of black-level correction, noise reduction, autoexposure control, auto-white-balance adjustment, CFA demosaicing, and gamma correction while applying advanced peripheral bus architecture to implement the hardware architecture. The speed of traditional autoexposure control algorithms to reach a proper exposure level is so slow that it is necessary to develop a fast autoexposure control method. Based on the optical-electrical characteristics of the CIS, we present a fast auto-exposure-control algorithm that can guarantee speed and accuracy. To ensure the peak SNR performance of the demosaiced images of the CIS and reduce the computational cost at the same time, the proposed demosaicing algorithm improves on the adaptive edge-sensitive algorithm and the fuzzy assignment algorithm. The experimental results show that the proposed hardware architecture works well on the FPGA development board and produces better quality images.

Ge, Zhiwei; Yao, Suying; Xu, Jiangtao

2010-07-01

262

Lithosphere-to-Ionosphere Plug-and-Play Architecture (LION-PNP): Sensor Networking Made Cheap and Easy  

Science.gov (United States)

The lack of rapidly reconfigurable and easily deployable instrumentation packages often results in information loss during unannounced or time-critical geophysical events such as spaceweather flare-ups, earthquakes, volcanic eruptions, and tsunamis. While increasingly powerful and sensitive sensor technologies have been created in the last years to study our planet, robust, yet simple and cost-effective, mechanical, electrical, and data interfaces between these devices and the user (scientist) have yet to be developed. To address this problem, we present the LIthosphere-to-IOnosphere Plug-aNd-Play architecture (LION-PNP), a complete, low cost integration protocol for space, atmospheric, and terrestrial sensor networks. Similar to the USB plug-and-play protocols created for personal computers, LION-PNP offers geophysicists and space scientists the ability to assemble and operate complex sensor packages by simply 'plugging' devices (magnetometers, seismometers, GPS, spectrometers, etc) into a centralized Command and Data Handling unit (CDH). LION-PNP accomplishes this by inserting a Generic Sensor Interpreter (GSI) between the back-end of a device and the CDH. The GSI allows the CDH to automatically configure a sensor without requiring the user to manually install drivers. Furthermore, LION-PNP supports a number wireless networking protocols, allowing arrays of sensor nodes to be deployed rapidly over an area of interest. Finally, LION is compatible with the Android operating system, allowing the user to rapidly visualize, store and distribute data. In the following work, we report on the development of LION-PNP. To validate our hardware and software interfaces, we flew a small 4-point LION network on a multiple high altitude balloon launch. For this campaign, each node carried an array of sensors, including a magnetometer, temperature and pressure sensors, as well as GPS. The LION plug-and-play system allowed us to compose the network minutes before launch. Once in flight, the network and data management were handled by a Nexus 7 tablet.

Darling, N.; Mendez, J. S.; Manes, C.

2013-12-01

263

A Scalable Wireless Sensor Network (WSN Based Architecture for Fire Disaster Monitoring in the Developing World  

Directory of Open Access Journals (Sweden)

Full Text Available All over the world, there is a tremendous increase in disaster occurrences such as landslide, toxic gas pollutions and wild fires. Least developed countries like Uganda have taken minimal efforts in management and containment of such disasters on behalf of the local populace. The dangers of fires are as a result of lack of proper information about the location, intensity and rate of spread of fire. However, the use of WSN may be one of the alternative ways of reducing risks associated with spreading fires resulting into destruction of lives and property worth millions of shillings. Our research looks at fire monitoring using sensors deployed in an event field to detect possible precursors of a fire occurrence using a simulated approach of OPNET Modeler (Ver. 14.0. Mobile nodes were deployed in proximity of (500X500 m2 flat space moving at a uniform speed of 10ms-1 for 30 minutes. Our simulations are based on ftp high priority traffic to reflect real time information transfer for analysis. This paper evaluates and discusses how sensed information can be transmitted through a network with minimal delay and proposes a scalable WSN architectural design based on protocol perspective i.e. AODV and DSR. Two QoS parameters have been considered i.e. delay and throughput. Our results show that AODV scheme has got a minimum delay of 0.2ms-1and a maximum throughput of 1.7Mbps. Hence it's highly recommended for monitoring fires in large open area settings compared to DSR that is suitable for smaller areas. Results show that DSR exhibits higher delays due to nodal congestion and high control overheads. However, introducing the proposed heterogeneous routing mechanism i.e. (AODV+DSR into the network significantly improves the performance of DSR.

Emmanuel Lule

2015-01-01

264

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

2012-11-01

265

The Architecture and Development of Multi-Role Course Design of a Web-Based Group Training System  

Directory of Open Access Journals (Sweden)

Full Text Available Due to the fast development of information technology there are new opportunities for traditional training systems. Many e-training systems are proposed and implemented, however, there is rarely any research on group based e-training system that allow people to train in a group that involves different roles. This paper proposes an architecture for a web based surgery group training system that supports multi-role group training courses. A course model based on XPDL (XML Process Definition Language is introduced to bridge the understanding of a graphical multi-role course design and the computer application. There is also an explanation on how the multi-role courses are designed and used in applications. Finally a demonstration experiment is given.

Xi Guo

2013-02-01

266

Design Architecture-Based on Web Server and Application Cluster in Cloud Environment  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Cloud has been a computational and storage solution for many data centric organizations. The problem today those organizations are facing from the cloud is in data searching in an efficient manner. A framework is required to distribute the work of searching and fetching from thousands of computers. The data in HDFS is scattered and needs lots of time to retrieve. The major idea is to design a web server in the map phase using the jetty web server which will give a fast and e...

Shah, Gita; Annappa; Shet, K. C.

2014-01-01

267

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

Science.gov (United States)

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. PMID:23983621

Krasowski, Michael J; Prokop, Norman F; Flatico, Joseph M; Greer, Lawrence C; Jenkins, Phillip P; Neudeck, Philip G; Chen, Liangyu; Spina, Danny C

2013-01-01

268

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

International Nuclear Information System (INIS)

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)

269

Problems of Implementing SCORM in an Enterprise Distance Learning Architecture: SCORM Incompatibility across Multiple Web Domains.  

Science.gov (United States)

Delivering content to distant users located in dispersed networks, separated by firewalls and different web domains requires extensive customization and integration. This article outlines some of the problems of implementing the Sharable Content Object Reference Model (SCORM) in the Marine Corps' Distance Learning System (MarineNet) and extends…

Engelbrecht, Jeffrey C.

2003-01-01

270

POGs2: a web portal to facilitate cross-species inferences about protein architecture and function in plants.  

Science.gov (United States)

The Putative orthologous Groups 2 Database (POGs2) (http://pogs.uoregon.edu/) integrates information about the inferred proteomes of four plant species (Arabidopsis thaliana, Zea mays, Orza sativa, and Populus trichocarpa) in a display that facilitates comparisons among orthologs and extrapolation of annotations among species. A single-page view collates key functional data for members of each Putative Orthologous Group (POG): graphical representations of InterPro domains, predicted and established intracellular locations, and imported gene descriptions. The display incorporates POGs predicted by two different algorithms as well as gene trees, allowing users to evaluate the validity of POG memberships. The web interface provides ready access to sequences and alignments of POG members, as well as sequences, alignments, and domain architectures of closely-related paralogs. A simple and flexible search interface permits queries by BLAST and by any combination of gene identifier, keywords, domain names, InterPro identifiers, and intracellular location. The concurrent display of domain architectures for orthologous proteins highlights errors in gene models and false-negatives in domain predictions. The POGs2 layout is also useful for exploring candidate genes identified by transposon tagging, QTL mapping, map-based cloning, and proteomics, and for navigating between orthologous groups that belong to the same gene family. PMID:24340041

Tomcal, Michael; Stiffler, Nicholas; Barkan, Alice

2013-01-01

271

Very Low-Memory Wavelet Compression Architecture Using Strip-Based Processing for Implementation in Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available This paper presents a very low-memory wavelet compression architecture for implementation in severely constrained hardware environments such as wireless sensor networks (WSNs. The approach employs a strip-based processing technique where an image is partitioned into strips and each strip is encoded separately. To further reduce the memory requirements, the wavelet compression uses a modified set-partitioning in hierarchical trees (SPIHT algorithm based on a degree-0 zerotree coding scheme to give high compression performance without the need for adaptive arithmetic coding which would require additional storage for multiple coding tables. A new one-dimension (1D addressing method is proposed to store the wavelet coefficients into the strip buffer for ease of coding. A softcore microprocessor-based hardware implementation on a field programmable gate array (FPGA is presented for verifying the strip-based wavelet compression architecture and software simulations are presented to verify the performance of the degree-0 zerotree coding scheme.

Kah Phooi Seng

2009-01-01

272

A Multifaceted Web Services Architecture: Toward a Meta-Service Framework for Service and Composition Development  

Digital Repository Infrastructure Vision for European Research (DRIVER)

SOA is an architectural style that promotes solutions, especially service-based applications to support flexible business processes, where services are loosely coupled and interoperable components. Many methods have been developed in industry and academia. Yet the comparison frameworks show that these methods neither comply with SOA nor service orientation principles. Therefore, we need theoretical frameworks to guide developing methods and processes. A meta-service framework, representing th...

Youcef Baghdadi

2013-01-01

273

Architecture of the wood-wide web: Rhizopogon spp. genets link multiple Douglas-fir cohorts.  

Science.gov (United States)

*The role of mycorrhizal networks in forest dynamics is poorly understood because of the elusiveness of their spatial structure. We mapped the belowground distribution of the fungi Rhizopogon vesiculosus and Rhizopogon vinicolor and interior Douglas-fir trees (Pseudotsuga menziesii var. glauca) to determine the architecture of a mycorrhizal network in a multi-aged old-growth forest. *Rhizopogon spp. mycorrhizas were collected within a 30 x 30 m plot. Trees and fungal genets were identified using multi-locus microsatellite DNA analysis. Tree genotypes from mycorrhizas were matched to reference trees aboveground. Two trees were considered linked if they shared the same fungal genet(s). *The two Rhizopogon species each formed 13-14 genets, each colonizing up to 19 trees in the plot. Rhizopogon vesiculosus genets were larger, occurred at greater depths, and linked more trees than genets of R. vinicolor. Multiple tree cohorts were linked, with young saplings established within the mycorrhizal network of Douglas-fir veterans. A strong positive relationship was found between tree size and connectivity, resulting in a scale-free network architecture with small-world properties. *This mycorrhizal network architecture suggests an efficient and robust network, where large trees play a foundational role in facilitating conspecific regeneration and stabilizing the ecosystem. PMID:19878460

Beiler, Kevin J; Durall, Daniel M; Simard, Suzanne W; Maxwell, Sheri A; Kretzer, Annette M

2010-01-01

274

Server Technology – Web Based Service Oriented Architecture for Mobile Augmented Reality System  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Server Technology stands for lots of technology in mind like Microsoft, Sun Java, IBM, Open Source and many more. In mobile augmentation, server plays very important role to augment the data. Responsibility of the server is to collect the data , mixed virtual data with real data and these data sent back to client on Remote device at Remote place In this paper we briefly discuss about the server technology for web based Service oriented, also the processing software required for aug...

Jatin Dilipkumar Shah; Dr. Bijendra Agrawal

2012-01-01

275

Making secure Semantic Web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

this paper first describes ways of semantic web security implementation through layers. These layers are presented as a backbone for semantic web architecture and are represented in XML security, RDF security and in an idea of semantic web security standardization.

Adis Medi?; Adis Golubovi?

2010-01-01

276

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.

Ekberg Joakim

2008-11-01

277

MVC Architecture Driven Design and Agile Implementation of a Web-Based Software System  

Directory of Open Access Journals (Sweden)

Full Text Available This paper reports design and implementation of a web based software system for storing and managinginformation related to time management and productivity of employees working on a project.The systemhas been designed and implemented with best principles from model viewcontrollerand agile development.Such system has practical use for any organization in terms of ease of use, efficiency, and cost savings. Themanuscript describes design of the system as well as its database and user interface. Detailed snapshots ofthe working system are provided too

Sandhya Prakash

2013-11-01

278

Web Page Recommendation Using Web Mining  

Directory of Open Access Journals (Sweden)

Full Text Available On World Wide Web various kind of content are generated in huge amount, so to give relevant result to user web recommendation become important part of web application. On web different kind of web recommendation are made available to user every day that includes Image, Video, Audio, query suggestion and web page. In this paper we are aiming at providing framework for web page recommendation. 1 First we describe the basics of web mining, types of web mining. 2 Details of each web mining technique.3We propose the architecture for the personalized web page recommendation.

Modraj Bhavsar

2014-07-01

279

Enviro-Net: From Networks of Ground-Based Sensor Systems to a Web Platform for Sensor Data Management  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Ecosystems monitoring is essential to properly understand their development and the effects of events, both climatological and anthropological in nature. The amount of data used in these assessments is increasing at very high rates. This is due to increasing availability of sensing systems and the development of new techniques to analyze sensor data. The Enviro-Net Project encompasses several of such sensor system deployments across five countries in the Americas. These deployments use a few ...

Nascimento, Mario A.; Arturo Sanchez-azofeifa, G.; Pastorello, Gilberto Z.

2011-01-01

280

A sensor management architecture concept for monitoring emissions from open-air demil operations.  

Energy Technology Data Exchange (ETDEWEB)

Sandia National Laboratories, CA proposed a sensor concept to detect emissions from open-burning/open-detonation (OB/OD) events. The system would serve two purposes: (1) Provide data to demilitarization operations about process efficiency, allowing process optimization for cleaner emissions and higher efficiency. (2) Provide data to regulators and neighboring communities about materials dispersing into the environment by OB/OD operations. The proposed sensor system uses instrument control hardware and data visualization software developed at Sandia National Laboratories to link together an array of sensors to monitor emissions from OB/OD events. The suite of sensors would consist of various physical and chemical detectors mounted on stationary or mobile platforms. The individual sensors would be wirelessly linked to one another and controlled through a central command center. Real-time data collection from the sensors, combined with integrated visualization of the data at the command center, would allow for feedback to the sensors to alter operational conditions to adjust for changing needs (i.e., moving plume position, increased spatial resolution, increased sensitivity). This report presents a systems study of the problem of implementing a sensor system for monitoring OB/OD emissions. The goal of this study was to gain a fuller understanding of the political, economic, and technical issues for developing and fielding this technology.

Johnson, Michael M.; Robinson, Jerry D.; Stoddard, Mary Clare; Horn, Brent A.; Lipkin, Joel; Foltz, Greg W.

2005-09-01

 
 
 
 
281

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

2013-04-01

282

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

International Nuclear Information System (INIS)

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. (paper)

283

Sensor Search Techniques for Sensing as a Service Architecture for The Internet of Things  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The Internet of Things (IoT) is part of the Internet of the future and will comprise billions of intelligent communicating "things" or Internet Connected Objects (ICO) which will have sensing, actuating, and data processing capabilities. Each ICO will have one or more embedded sensors that will capture potentially enormous amounts of data. The sensors and related data streams can be clustered physically or virtually, which raises the challenge of searching and selecting the ...

Perera, Charith; Zaslavsky, Arkady; Liu, Chi Harold; Compton, Michael; Christen, Peter; Georgakopoulos, Dimitrios

2013-01-01

284

IN-SITU IONIC CHEMICAL ANALYSIS OF FRESH WATER VIA A NOVEL COMBINED MULTI-SENSOR / SIGNAL PROCESSING ARCHITECTURE  

Science.gov (United States)

The capability for comprehensive, real-time, in-situ characterization of the chemical constituents of natural waters is a powerful tool for the advancement of the ecological and geochemical sciences, e.g. by facilitating rapid high-resolution adaptive sampling campaigns and avoiding the potential errors and high costs related to traditional grab sample collection, transportation and analysis. Portable field-ready instrumentation also promotes the goals of large-scale monitoring networks, such as CUASHI and WATERS, without the financial and human resources overhead required for traditional sampling at this scale. Problems of environmental remediation and monitoring of industrial waste waters would additionally benefit from such instrumental capacity. In-situ measurement of all major ions contributing to the charge makeup of natural fresh water is thus pursued via a combined multi-sensor/multivariate signal processing architecture. The instrument is based primarily on commercial electrochemical sensors, e.g. ion selective electrodes (ISEs) and ion selective field-effect transistors (ISFETs), to promote low cost as well as easy maintenance and reproduction,. The system employs a novel architecture of multivariate signal processing to extract accurate information from in-situ data streams via an "unmixing" process that accounts for sensor non-linearities at low concentrations, as well as sensor cross-reactivities. Conductivity, charge neutrality and temperature are applied as additional mathematical constraints on the chemical state of the system. Including such non-ionic information assists in obtaining accurate and useful calibrations even in the non-linear portion of the sensor response curves, and measurements can be made without the traditionally-required standard additions or ionic strength adjustment. Initial work demonstrates the effectiveness of this methodology at predicting inorganic cations (Na+, NH4+, H+, Ca2+, and K+) in a simplified system containing only a single anion (Cl-) in addition to hydroxide, thus allowing charge neutrality to be easily and explicitly invoked. Calibration of every probe relative to each of the five cations present is undertaken, and resulting curves are used to create a representative environmental data set based on USGS data for New England waters. Signal processing methodologies, specifically artificial neural networks (ANNs), are extended to use a feedback architecture based on conductivity measurements and charge neutrality calculations. The algorithms are then tuned to optimize performance of the algorithm at predicting actual concentrations from these simulated signals. Results are compared to use of component probes as stand-alone sensors. Future extension of this instrument for multiple anions (including carbonate and bicarbonate, nitrate, and sulfate) will ultimately provide rapid, accurate field measurements of the entire charge balance of natural waters at high resolution, improving sampling abilities while reducing costs and errors related to transport and analysis of grab samples.

Mueller, A. V.; Hemond, H.

2009-12-01

285

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 sink node that delivers them to a Base Station for use and decision making. WSN are used in several fields ranging from military applications to civilian ones, for security, home automation and healt...

Amokrane, Ahmed; Challal, Yacine; Balla, Amar

2011-01-01

286

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

287

Architecture, cost-model and customization of real-time monitoring systems based on mobile biological sensor data-streams.  

Science.gov (United States)

Innovation in the fields of wireless data communications, mobile devices and biosensor technology enables the development of new types of monitoring systems that provide people with assistance anywhere and at any time. In this paper we present an architecture useful to build those kind of systems that monitor data streams generated by biological sensors attached to mobile users. We pay special attention to three aspects related to the system efficiency: selection of the optimal granularity, that is, the selection of the size of the input data stream package that has to be acquired in order to start a new processing cycle; the possible use of compression techniques to store and send the acquired input data stream and; finally, the performance of a local analysis versus a remote one. Moreover, we introduce two particular real systems to illustrate the suitability and applicability of our proposal: an anywhere and at any time monitoring system of heart arrhythmias and an apnea monitoring system. PMID:19481289

Goñi, Alfredo; Burgos, Alfredo; Dranca, Lacramioara; Rodríguez, Jimena; Illarramendi, Arantza; Bermúdez, Jesús

2009-11-01

288

Field-programmable gate array-based hardware architecture for high-speed camera with KAI-0340 CCD image sensor  

Science.gov (United States)

We present a field-programmable gate array (FPGA)-based hardware architecture for high-speed camera which have fast auto-exposure control and colour filter array (CFA) demosaicing. The proposed hardware architecture includes the design of charge coupled devices (CCD) drive circuits, image processing circuits, and power supply circuits. CCD drive circuits transfer the TTL (Transistor-Transistor-Logic) level timing Sequences which is produced by image processing circuits to the timing Sequences under which CCD image sensor can output analog image signals. Image processing circuits convert the analog signals to digital signals which is processing subsequently, and the TTL timing, auto-exposure control, CFA demosaicing, and gamma correction is accomplished in this module. Power supply circuits provide the power for the whole system, which is very important for image quality. Power noises effect image quality directly, and we reduce power noises by hardware way, which is very effective. In this system, the CCD is KAI-0340 which is can output 210 full resolution frame-per-second, and our camera can work outstandingly in this mode. The speed of traditional auto-exposure control algorithms to reach a proper exposure level is so slow that it is necessary to develop a fast auto-exposure control method. We present a new auto-exposure algorithm which is fit high-speed camera. Color demosaicing is critical for digital cameras, because it converts a Bayer sensor mosaic output to a full color image, which determines the output image quality of the camera. Complexity algorithm can acquire high quality but cannot implement in hardware. An low-complexity demosaicing method is presented which can implement in hardware and satisfy the demand of quality. The experiment results are given in this paper in last.

Wang, Hao; Yan, Su; Zhou, Zuofeng; Cao, Jianzhong; Yan, Aqi; Tang, Linao; Lei, Yangjie

2013-08-01

289

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

2011-09-01

290

Very Low-Memory Wavelet Compression Architecture Using Strip-Based Processing for Implementation in Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available Abstract This paper presents a very low-memory wavelet compression architecture for implementation in severely constrained hardware environments such as wireless sensor networks (WSNs. The approach employs a strip-based processing technique where an image is partitioned into strips and each strip is encoded separately. To further reduce the memory requirements, the wavelet compression uses a modified set-partitioning in hierarchical trees (SPIHT algorithm based on a degree-0 zerotree coding scheme to give high compression performance without the need for adaptive arithmetic coding which would require additional storage for multiple coding tables. A new one-dimension (1D addressing method is proposed to store the wavelet coefficients into the strip buffer for ease of coding. A softcore microprocessor-based hardware implementation on a field programmable gate array (FPGA is presented for verifying the strip-based wavelet compression architecture and software simulations are presented to verify the performance of the degree-0 zerotree coding scheme.

Chew LiWern

2009-01-01

291

A Middleware Architecture Supporting Native Mobile Agents for Wireless Sensor Networks  

Science.gov (United States)

Mobile Software Agents are widely used in telecommunication networks and the Internet, however their application to embedded systems such as Wireless Sensor Networks is immature. We present a novel middleware supporting and enabling Mobile Agent applications to run natively, without any translation layer, on Wireless Sensor Networks. We establish that Mobile Agent systems are beneficial for a wide range of applications - particularly when dealing with complex, dynamic and spatially distributed tasks, and demonstrate their power and certain performance metrics for an example applications. We use an accurate emulation platform to evaluate the system performance in a distributed control application implemented using mobile software agents.

Lynch, Ciarán; Pesch, Dirk

292

Teaching the Geoweb: Interdisciplinary Undergraduate Research in Wireless Sensor Networks, Web Mapping, and Geospatial Data Management  

Science.gov (United States)

This article addresses an effort to incorporate wireless sensor networks and the emerging tools of the Geoweb into undergraduate teaching and research at a small liberal arts college. The primary goal of the research was to identify the hardware, software, and skill sets needed to deploy a local sensor network, collect data, and transmit that data…

Abernathy, David

2011-01-01

293

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 o...

Jaime Lloret; Miguel Garcia; Fernando Boronat; Jesus Tomás

2009-01-01

294

Evolving Wireless Sensor Network Behavior Through Adaptability Points in Middleware Architectures  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ...

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

2011-01-01

295

?????????? Semantic Web ? ???????? ???????????? ????????  

Digital Repository Infrastructure Vision for European Research (DRIVER)

?????????? ?????????? ???????????? ???? Semantic Web ?? ???????? ???????? ????????. ????????????? ??????? ?????? ???? ???????? ???????? ?? ???? Educational Semantic Web. ???????? ??????????? ???????? ??????????????? ??????????? ???????? ???????????????? ???? ?? ?????????? ????...

Anna Lamandini

2012-01-01

296

????????? ?????? ?????????? ???????? ???????? ?? ???? Semantic Web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

?????????? ?????????? ???????????? ???? Semantic Web ?? ???????? ???????? ????????. ????????????? ??????? ?????? ???? ???????? ???????? ?? ???? Educational Semantic Web. ???????? ??????????? ???????? ??????????????? ??????????? ???????? ???????????????? ???? ?? ?????????? ????...

??????, ?. ?.; ??????, ?. ?.; Koren, O. M.

2011-01-01

297

Designing an architectural style for dynamic medical Cross-Organizational Workflow management system: an approach based on agents and web services.  

Science.gov (United States)

This paper shows how the combined use of agent and web services technologies can help to design an architectural style for dynamic medical Cross-Organizational Workflow (COW) management system. Medical COW aims at supporting the collaboration between several autonomous and possibly heterogeneous medical processes, distributed over different organizations (Hospitals, Clinic or laboratories). Dynamic medical COW refers to occasional cooperation between these health organizations, free of structural constraints, where the medical partners involved and their number are not pre-defined. More precisely, this paper proposes a new architecture style based on agents and web services technologies to deal with two key coordination issues of dynamic COW: medical partners finding and negotiation between them. It also proposes how the proposed architecture for dynamic medical COW management system can connect to a multi-agent system coupling the Clinical Decision Support System (CDSS) with Computerized Prescriber Order Entry (CPOE). The idea is to assist the health professionals such as doctors, nurses and pharmacists with decision making tasks, as determining diagnosis or patient data analysis without stopping their clinical processes in order to act in a coherent way and to give care to the patient. PMID:24682670

Bouzguenda, Lotfi; Turki, Manel

2014-04-01

298

Energy Efficient Security Architecture for Wireless BioMedical Sensor Networks  

CERN Document Server

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

299

An Architecture for Measuring Joint Angles Using a Long Period Fiber Grating-Based Sensor  

Science.gov (United States)

The implementation of signal filters in a real-time form requires a tradeoff between computation resources and the system performance. Therefore, taking advantage of low lag response and the reduced consumption of resources, in this article, the Recursive Least Square (RLS) algorithm is used to filter a signal acquired from a fiber-optics-based sensor. In particular, a Long-Period Fiber Grating (LPFG) sensor is used to measure the bending movement of a finger. After that, the Gaussian Mixture Model (GMM) technique allows us to classify the corresponding finger position along the motion range. For these measures to help in the development of an autonomous robotic hand, the proposed technique can be straightforwardly implemented on real time platforms such as Field Programmable Gate Array (FPGA) or Digital Signal Processors (DSP). Different angle measurements of the finger's motion are carried out by the prototype and a detailed analysis of the system performance is presented. PMID:25536002

Perez-Ramirez, Carlos A.; Almanza-Ojeda, Dora L.; Guerrero-Tavares, Jesus N.; Mendoza-Galindo, Francisco J.; Estudillo-Ayala, Julian M.; Ibarra-Manzano, Mario A.

2014-01-01

300

An Architecture for Measuring Joint Angles Using a Long Period Fiber Grating-Based Sensor  

Directory of Open Access Journals (Sweden)

Full Text Available The implementation of signal filters in a real-time form requires a tradeoff between computation resources and the system performance. Therefore, taking advantage of low lag response and the reduced consumption of resources, in this article, the Recursive Least Square (RLS algorithm is used to filter a signal acquired from a fiber-optics-based sensor. In particular, a Long-Period Fiber Grating (LPFG sensor is used to measure the bending movement of a finger. After that, the Gaussian Mixture Model (GMM technique allows us to classify the corresponding finger position along the motion range. For these measures to help in the development of an autonomous robotic hand, the proposed technique can be straightforwardly implemented on real time platforms such as Field Programmable Gate Array (FPGA or Digital Signal Processors (DSP. Different angle measurements of the finger’s motion are carried out by the prototype and a detailed analysis of the system performance is presented.

Carlos A. Perez-Ramirez

2014-12-01

 
 
 
 
301

Energy Efficient Security Architecture for Wireless BioMedical Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ...

Rajeswari Mukesh; Damodaram, Dr A.; Subbiah Bharathi, Dr V.

2009-01-01

302

A study of Wireless Sensor Network Architectures and Projects for Traffic Light Monitoring  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Vehicular traffic is increasing around the world, especially in urban areas. This increase results in a huge traffic congestion, which has dramatic consequences on economy, human health, and environment. Traditional methods used for traffic management, surveillance and control become inefficient in terms of performance, cost, maintenance, and support, with the increased traffic. Wireless Sensor Networks (WSN) is an emergent technology with an effective potential to overcome these difficulties...

Kafi, Mohamed Amine; Challal, Yacine; Djenouri, Djamel; Bouabdallah, Abdelmadjid; Khelladi, Lyes; Badache, Nadjib

2012-01-01

303

A Study of Wireless Sensor Networks for Urban Traffic Monitoring: Applications and Architectures  

Digital Repository Infrastructure Vision for European Research (DRIVER)

With the constant increasing of Vehicular traffic around the world, especially in urban areas, existing traffic management solutions become inefficient. This can be clearly seen in our life through persistent traffic jam and rising number of accidents. Wireless sensor networks (WSN) based intelligent transportation systems (ITS) have emerged as a cost effective technology that bear a pivotal potential to overcome these difficulties. This technology enables a new broad range of smart city appl...

Kafi, Mohamed Amine; Challal, Yacine; Djenouri, Djamel; Doudou, Messaoud; Bouabdallah, Abdelmadjid; Badache, Nadjib

2013-01-01

304

A Three-Tiered Architecture for Large-Scale Wireless Hospital Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The Utra Wide Band physical layer specified by the IEEE 802.15.4a standard [1] presents numerous advantages comparing with its original IEEE 802.15.4 standard, namely high accuracy positioning ability, high data rate up to 27 mbps, extended communication range, low power consumption and low complexity. Actually, many research and development activities focus on the design of UWB sensor nodes entities. However nodes interactions or network configuration are neglected. For that, we propose in t...

Ben Sliman, Jamila; Song, Ye-qiong; Kouba?a, Anis; Frikha, Mounir

2009-01-01

305

A DVP-Based Bridge Architecture to Randomly Access Pixels of High-Speed Image Sensors  

Directory of Open Access Journals (Sweden)

Full Text Available A design of a novel bridge is proposed to interface digital-video-port (DVP compatible image sensors with popular microcontrollers. Most commercially available CMOS image sensors send image data at high speed and in a row-by-row fashion. On the other hand, commercial microcontrollers run at relatively slower speed, and many embedded system applications need random access of pixel values. Moreover, commercial microcontrollers may not have sufficient internal memory to store a complete image of high resolution. The proposed bridge addresses these problems and provides an easy-to-use and compact way to interface image sensors with microcontrollers. The proposed design is verified in FPGA and later implemented using CMOS 0.18?um Artisan library cells. The design costs 4,735 gates and 0.12?mm2 silicon area. The synthesis results show that the bridge can support a data rate up to 254?megasamples/sec. Its applications may include pattern recognition, robotic vision, tracking system, and medical imaging.

Khan TareqHasan

2011-01-01

306

Development of an intelligent wireless sensor network with mobile nodes  

Science.gov (United States)

Wireless sensor networks have become viable solutions to many commercial and military applications. This research focuses on utilizing the I-TRM to develop an architecture which supports adaptive, self-healing, and self-aware intelligent wireless sensor networks capable of supporting mobile nodes. Sensor subsystems are crucial in the development of projects to test complex systems such as the Future Combat System, a multi-layered system consisting of soldiers and 18 subsystems connected by a network. The proposed architecture utilizes the Sensor Web Enablement (SWE), a standard for sensor networks being developed by the Open Geospatial Consortium (OGC), and the Integrated Technical Reference Model (I-TRM), a multi-layered technical reference model consisting of a behavior-centric technical reference model, information-centric technical reference model, and control technical reference model. The designed architecture has been implemented on MPR2400CA motes using the nesC programming language. Preliminary results show the architecture meets needs of systems such as the Future Combat System. The architecture supports standard and tailored sensors, mobile and immobile sensors nodes, and is scalable. Also, functionality was implemented which produces adaptive, self-healing, and self-aware behavior in the wireless sensor network.

St. Pierre, Joseph; Michel, Howard E.

2009-05-01

307

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.

2012-06-01

308

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

2012-08-01

309

Concepts and Development of Bio-Inspired Distributed Embedded Wired/Wireless Sensor Array Architectures for Acoustic Wave Sensing in Integrated Aerospace Vehicles  

Science.gov (United States)

This paper discusses the modeling of acoustic emissions in plate structures and their sensing by embedded or surface bonded piezoelectric sensor arrays. Three different modeling efforts for acoustic emission (AE) wave generation and propagation are discussed briefly along with their advantages and disadvantages. Continuous sensors placed at right angles on a plate are being discussed as a new approach to measure and locate the source of acoustic waves. Evolutionary novel signal processing algorithms and bio-inspired distributed sensor array systems are used on large structures and integrated aerospace vehicles for AE source localization and preliminary results are presented. These systems allow for a great reduction in the amount of data that needs to be processed and also reduce the chances of false alarms from ambient noises. It is envisioned that these biomimetic sensor arrays and signal processing techniques will be useful for both wireless and wired sensor arrays for real time health monitoring of large integrated aerospace vehicles and earth fixed civil structures. The sensor array architectures can also be used with other types of sensors and for other applications.

Ghoshal, Anindya; Prosser, William H.; Kirikera, Goutham; Schulz, Mark J.; Hughes, Derke J.; Orisamolu, Wally

2003-01-01

310

Flexible Architecture of Ultra-Low-Power Current-Mode Interleaved Successive Approximation Analog-to-Digital Converter forWireless Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

A novel 8-bit current mode interleaved successive approximation (SAR) analog-digital converter (ADC) has been proposed. The proposed converter architecture is very flexible. Using two control DC voltages and one reference current, the converter can be tuned to work with different sampling rates, number of bits of resolution, and power consumption levels. Due to its very lowpower consumption and flexibility, the converter is particularly suitable for application in wireless sensor networks. Co...

Dlugosz, Rafal Tomasz; Iniewski, Kris

2007-01-01

311

Sensors  

Energy Technology Data Exchange (ETDEWEB)

A new type of ceramic oxygen sensors based on semiconducting oxides was developed in this project. The advantage of these sensors compared to standard ZrO{sub 2} sensors is that they do not require a reference gas and that they can be produced in small sizes. The sensor design and the techniques developed for production of these sensors are judged suitable by the participating industry for a niche production of a new generation of oxygen sensors. Materials research on new oxygen ion conducting conductors both for applications in oxygen sensors and in fuel was also performed in this project and finally a new process was developed for fabrication of ceramic tubes by dip-coating. (EHS)

Jensen, H. [PBI-Dansensor A/S (Denmark); Toft Soerensen, O. [Risoe National Lab., Materials Research Dept. (Denmark)

1999-10-01

312

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

CERN Document Server

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

313

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

2010-06-01

314

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

2012-12-01

315

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

LENUS (Irish Health Repository)

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

2011-12-21

316

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

2011-12-01

317

An Agent Based Architecture (Using Planning for Dynamic and Semantic Web Services Composition In an EBXML Context  

Directory of Open Access Journals (Sweden)

Full Text Available The process-based semantic composition of Web Services is gaining a considerable momentum as anapproach for the effective integration of distributed, heterogeneous, and autonomous applications. Tocompose Web Services semantically, we need an ontology. There are several ways of inserting semantics inWeb Services. One of them consists of using description languages like OWL-S. In this paper, we introduceour work which consists in the proposition of a new model and the use of semantic matching technology forsemantic and dynamic composition of ebXML business processes.

O.Hioual

2011-03-01

318

A performance analysis of WS-* (SOAP) and RESTful Web Services for Implementing Service and Resource Orientated Architectures  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The past number of years have seen the emergence of Service-Oriented Architectures as a dominant architecture for implementing enterprise scale distributed systems. Two main styles of SOA exist, namely SOAP based services and RESTful services. There has been much comment and debate on the pros and cons of each approach to implementing a SOA, a lot of which has surrounded the performance characterictcs of both approaches. In this paper, the authors presents the results of a performance analysi...

Markey, Philip; Clynch, Gary

2013-01-01

319

Improvements to flood detection and monitoring through satellite autonomy, sensor webs, and hydrological modeling  

Science.gov (United States)

This dissertation is put together from a set of three journal papers. The first paper describes how satellite imagery and spacecraft autonomy are used to advance the field of near real-time detection, monitoring, and rapid response to flooding. The second paper describes the ground instrumentation of an artificial water recharge basin field site close to Tucson with a network of inter-connected sensors to study the transient process of repeated flooding in real-time, and the third paper describes an effort to link together multiple ground-based and space-based remote sensing assets to an integrated and coordinated monitoring system for floods. Collectively, the three papers describe new breakthroughs in the field of flood detection and monitoring through the use of satellite onboard automation and Sensorweb networks.

Ip, Filipe

320

Understanding the Hidden Web  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The hidden Web (also known as deep or invisible Web), that is, the part of the Web not directly accessible through hyperlinks, but through HTML forms or Web services, is of great value, but difficult to exploit. We discuss a process for the fully automatic discovery, syntactic and semantic analysis, and querying of hidden-Web services. We propose first a general architecture that relies on a semi-structured warehouse of imprecise (probabilistic) content. We provide a detailed complexity analy...

Senellart, Pierre

2007-01-01

 
 
 
 
321

An Energy-Efficient and High-Quality Video Transmission Architecture in Wireless Video-Based Sensor Networks  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Technological progress in the fields of Micro Electro-Mechanical Systems (MEMS) and wireless communications and also the availability of CMOS cameras, microphones and small-scale array sensors, which may ubiquitously capture multimedia content from the field, have fostered the development of low-cost limited resources Wireless Video-based Sensor Networks (WVSN). With regards to the constraints of video-based sensor nodes and wireless sensor networks, a supporting video stream is not easy to i...

Yasaman Samei; Mohsen Ebrahimi Moghadam; Maghsoud Abbaspour; Aghdasi, Hadi S.

2008-01-01

322

Web intelligence  

Digital Repository Infrastructure Vision for European Research (DRIVER)

?? ????? ??? ??????? ?????????? ?? Web Intelligence (WI), ??? ??? ????? ??????? ??? ????????? ??? ???????????. ?????????? ?? ?????? ???, ?? ????? ??? ????????, ?? ????? ???? ?????? ????????? ????? ?? ????? ??? ?? ?????????? ??? ?? ?????????????. ??? ???????? 2 ???????? ?? Web Usage Mining ??...

Nandini Jog, Shamala Mantri

2006-01-01

323

Ultra Compact and Low-power TDC and TAC Architectures for Highly-Parallel Implementation in Time-Resolved Image Sensors  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We report on the design and characterization of three different architectures, namely two Time-to- Digital Converters (TDCs) and a Time-to-Amplitude Converter (TAC) with embedded analog-to-digital conversion, implemented in a 130-nm CMOS imaging technology. The proposed circuit solutions are conceived for implementation at pixel-level, in image sensors exploiting Single-Photon Avalanche Diodes as photodetectors. The fabricated 32x32 TDCs/TACs arrays have a pitch of 50?m in both directions wh...

Stoppa, D.; Borghetti, F.; Richardson, J.; Walker, R.; Henderson, R. K.; Gersbach, M.; Charbon, E.

2011-01-01

324

Mimicking the End Organ Architecture of Slowly Adapting Type I Afferents May Increase the Durability of Artificial Touch Sensors  

Science.gov (United States)

In effort to mimic the sensitivity and efficient information transfer of natural tactile afferents, recent work has combined force transducers and computational models of mechanosensitive afferents. Sensor durability, another feature important to sensor design, might similarly capitalize upon biological rules. In particular, gains in sensor durability might leverage insight from the compound end organ of the slowly adapting type I afferent, especially its multiple sites of spike initiation that reset each other. This work develops models of compound spiking sensors using a computational network of transduction functions and leaky integrate and fire models (together a spike encoder, the software element of a compound spiking sensor), informed by the output of an existing force transducer (hardware sensing elements of a compound spiking sensor). Individual force transducer failures are simulated with and without resetting between spike encoders to test the importance of both resetting and configuration on system durability. The results indicate that the resetting of adjacent spike encoders, upon the firing of a spike by any one, is an essential mechanism to maintain a stable overall response in the midst of transducer failure. Furthermore, results suggest that when resetting is enabled, the durability of a compound sensor is maximized when individual transducers are paired with spike encoders and multiple, paired units are employed. To explore these ideas more fully, use cases examine the design of a compound sensor to either reach a target lifetime with a set probability or determine how often to schedule maintenance to control the probability of failure.

Lesniak, Daine R.; Gerling, Gregory J.

2015-01-01

325

Sensor  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The sensor (1) has a light source (2) for emitting a light (6), where an optical medium (4) is provided for focusing the light in a focal plane (7). Another optical medium is arranged to scatter and reflect the light from the focal plane to surrounding area (13). The light is partly guided to at a detector (3) which is adapted to detect another light (14).

Großmann, C.; Notni, G.; Riehemann, S.

2011-01-01

326

Optimal Design of MPD based fiber optic strain sensors and comparison of power meter and CCD camera based architectures  

Science.gov (United States)

In this work, we consider optimal design of Modal Power Distribution (MPD) based fiber optic sensors and compare power-meter and CCD camera based techniques for strain measurements. To the best of authors' knowledge, majority of the power-meter based MPD sensors use a single photo detector, and there is only one known work where two photodetectors are used with no optimization on photo-detector locations. Optimal measurement location selection problem and comparison of power-meter and CCD camera based sensor measurements were both addressed in this work. Based on our experimental data, more than 100% increased sensitivity is observed in the newly designed optimal strain sensor. It was also shown that there is a fixed nonlinear relationship between CCD based and power-meter based fiber optic sensor measurements. This allows estimation of power-meter measurements utilizing CCD camera images, which in turn simplifies the optimal detector location selection problem.

Toker, Onur; Efendioglu, Hasan S.; Esen, Mehmet E.; Fidanboylu, Kemal

2011-04-01

327

Hierarchical Thin Film Architectures for Enhanced Sensor Performance: Liquid Crystal-Mediated Electrochemical Synthesis of Nanostructured Imprinted Polymer Films for the Selective Recognition of Bupivacaine  

Directory of Open Access Journals (Sweden)

Full Text Available Nanostructured bupivacaine-selective molecularly imprinted 3-aminophenylboronic acid-p-phenylenediamine co-polymer (MIP films have been prepared on gold-coated quartz (Au/quartz resonators by electrochemical synthesis under cyclic voltammetric conditions in a liquid crystalline (LC medium (triton X-100/water. Films prepared in water and in the absence of template were used for control studies. Infrared spectroscopic studies demonstrated comparable chemical compositions for LC and control polymer films. SEM studies revealed that the topologies of the molecularly imprinted polymer films prepared in the LC medium (LC-MIP exhibit discernible 40 nm thick nano-fiber structures, quite unlike the polymers prepared in the absence of the LC-phase. The sensitivity of the LC-MIP in a quartz crystal microbalance (QCM sensor platform was 67.6 ± 4.9 Hz/mM under flow injection analysis (FIA conditions, which was ?250% higher than for the sensor prepared using the aqueous medium. Detection was possible at 100 nM (30 ng/mL, and discrimination of bupivacaine from closely related structural analogs was readily achieved as reflected in the corresponding stability constants of the MIP-analyte complexes. The facile fabrication and significant enhancement in sensor sensitivity together highlight the potential of this LC-based imprinting strategy for fabrication of polymeric materials with hierarchical architectures, in particular for use in surface-dependent application areas, e.g., biomaterials or sensing.

Subramanian Suriyanarayanan

2014-04-01

328

Hierarchical thin film architectures for enhanced sensor performance: liquid crystal-mediated electrochemical synthesis of nanostructured imprinted polymer films for the selective recognition of bupivacaine.  

Science.gov (United States)

Nanostructured bupivacaine-selective molecularly imprinted 3-aminophenylboronic acid-p-phenylenediamine co-polymer (MIP) films have been prepared on gold-coated quartz (Au/quartz) resonators by electrochemical synthesis under cyclic voltammetric conditions in a liquid crystalline (LC) medium (triton X-100/water). Films prepared in water and in the absence of template were used for control studies. Infrared spectroscopic studies demonstrated comparable chemical compositions for LC and control polymer films. SEM studies revealed that the topologies of the molecularly imprinted polymer films prepared in the LC medium (LC-MIP) exhibit discernible 40 nm thick nano-fiber structures, quite unlike the polymers prepared in the absence of the LC-phase. The sensitivity of the LC-MIP in a quartz crystal microbalance (QCM) sensor platform was 67.6 ± 4.9 Hz/mM under flow injection analysis (FIA) conditions, which was ?250% higher than for the sensor prepared using the aqueous medium. Detection was possible at 100 nM (30 ng/mL), and discrimination of bupivacaine from closely related structural analogs was readily achieved as reflected in the corresponding stability constants of the MIP-analyte complexes. The facile fabrication and significant enhancement in sensor sensitivity together highlight the potential of this LC-based imprinting strategy for fabrication of polymeric materials with hierarchical architectures, in particular for use in surface-dependent application areas, e.g., biomaterials or sensing. PMID:25587412

Suriyanarayanan, Subramanian; Nawaz, Hazrat; Ndizeye, Natacha; Nicholls, Ian A

2014-06-01

329

Hierarchical Thin Film Architectures for Enhanced Sensor Performance: Liquid Crystal-Mediated Electrochemical Synthesis of Nanostructured Imprinted Polymer Films for the Selective Recognition of Bupivacaine  

Science.gov (United States)

Nanostructured bupivacaine-selective molecularly imprinted 3-aminophenylboronic acid-p-phenylenediamine co-polymer (MIP) films have been prepared on gold-coated quartz (Au/quartz) resonators by electrochemical synthesis under cyclic voltammetric conditions in a liquid crystalline (LC) medium (triton X-100/water). Films prepared in water and in the absence of template were used for control studies. Infrared spectroscopic studies demonstrated comparable chemical compositions for LC and control polymer films. SEM studies revealed that the topologies of the molecularly imprinted polymer films prepared in the LC medium (LC-MIP) exhibit discernible 40 nm thick nano-fiber structures, quite unlike the polymers prepared in the absence of the LC-phase. The sensitivity of the LC-MIP in a quartz crystal microbalance (QCM) sensor platform was 67.6 ± 4.9 Hz/mM under flow injection analysis (FIA) conditions, which was ?250% higher than for the sensor prepared using the aqueous medium. Detection was possible at 100 nM (30 ng/mL), and discrimination of bupivacaine from closely related structural analogs was readily achieved as reflected in the corresponding stability constants of the MIP-analyte complexes. The facile fabrication and significant enhancement in sensor sensitivity together highlight the potential of this LC-based imprinting strategy for fabrication of polymeric materials with hierarchical architectures, in particular for use in surface-dependent application areas, e.g., biomaterials or sensing. PMID:25587412

Suriyanarayanan, Subramanian; Nawaz, Hazrat; Ndizeye, Natacha; Nicholls, Ian A.

2014-01-01

330

Services oriented architecture (SOA)-based persistent ISR simulation system  

Science.gov (United States)

In the modern networked battlefield, network centric warfare (NCW) scenarios need to interoperate between shared resources and data assets such as sensors, UAVs, satellites, ground vehicles, and command and control (C2/C4I) systems. By linking and fusing platform routing information, sensor exploitation results, and databases (e.g. Geospatial Information Systems [GIS]), the shared situation awareness and mission effectiveness will be improved. Within the information fusion community, various research efforts are looking at open standard approaches to composing the heterogeneous network components under one framework for future modeling and simulation applications. By utilizing the open source services oriented architecture (SOA) based sensor web services, and GIS visualization services, we propose a framework that ensures the fast prototyping of intelligence, surveillance, and reconnaissance (ISR) system simulations to determine an asset mix for a desired mission effectiveness, performance modeling for sensor management and prediction, and user testing of various scenarios.

Chen, Genshe; Blasch, Erik; Shen, Dan; Chen, Huimin; Pham, Khanh

2010-04-01

331

Information Architecture: Looking Ahead.  

Science.gov (United States)

Considers the future of the field of information architecture. Highlights include a comparison with the growth of the field of professional management; the design of information systems since the Web; more demanding users; the need for an interdisciplinary approach; and how to define information architecture. (LRW)

Rosenfeld, Louis

2002-01-01

332

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ...

Hossein Jadidoleslamy

2011-01-01

333

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

Over the last decade, the demand for efficient healthcare monitoring has increased and forced the health and wellness industry to embrace modern technological advances. Body Sensor Networks, or BSNs, can remotely collect users data and upload vital statistics to servers over the Internet. Advances in wireless technologies such as cellular devices and Bluetooth increase the mobility users experience while wearing a body sensor network. When connected by the proper framework, ...

Hala ElAarag; David Bauschlicher; Steven Bauschlicher

2013-01-01

334

Comprendre le Web caché  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Le Web caché (également appelé Web profond ou Web invisible), c'est-à-dire la partie du Web qui n'est pas directement accessible par des hyperliens, mais à travers des formulaires HTML ou des services Web, est d'une grande valeur, mais difficile à exploiter. Nous présentons un processus pour la découverte, l'analyse syntaxique et sémantique, et l'interrogation des services du Web caché, le tout de manière entièrement automatique. Nous proposons une architecture générale se basan...

Senellart, Pierre

2007-01-01

335

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

2010-06-01

336

Organization capable intelligent sensors  

Science.gov (United States)

Sensors are used to monitor and interpret many different environments and phenomena. The capability of a sensor array or network is constrained first by the sensors included and secondly by how the sensors are allowed to communicate and cooperatively work together. In this paper, we show how the combination of sensors, with embedded intelligent capability, and multiagent organization systems are integrated to create a highly adaptive, scalable and viable architecture to interpret task domains, typically monitored by a lower-functioning sensor network.

Matson, Eric; Bhatnagar, Raj

2007-04-01

337

Sensor-model prediction, monitoring and in-situ control of liquid RTM advanced fiber architecture composite processing  

Science.gov (United States)

In-situ frequency dependent electromagnetic sensors (FDEMS) and the Loos resin transfer model have been used to select and control the processing properties of an epoxy resin during liquid pressure RTM impregnation and cure. Once correlated with viscosity and degree of cure the FDEMS sensor monitors and the RTM processing model predicts the reaction advancement of the resin, viscosity and the impregnation of the fabric. This provides a direct means for predicting, monitoring, and controlling the liquid RTM process in-situ in the mold throughout the fabrication process and the effects of time, temperature, vacuum and pressure. Most importantly, the FDEMS-sensor model system has been developed to make intelligent decisions, thereby automating the liquid RTM process and removing the need for operator direction.

Kranbuehl, D.; Kingsley, P.; Hart, S.; Loos, A.; Hasko, G.; Dexter, B.

1992-01-01

338

Spider webs: Damage control  

Science.gov (United States)

A study reveals that spider orb webs fail in a nonlinear fashion, owing to the hierarchical organization of the silk proteins. The discovery may serve as inspiration for engineers for the design of aerial, light-weight, robust architectures.

Omenetto, Fiorenzo G.; Kaplan, David L.

2012-04-01

339

A Content Standard for Computational Models; Digital Rights Management (DRM) Architectures; A Digital Object Approach to Interoperable Rights Management: Finely-Grained Policy Enforcement Enabled by a Digital Object Infrastructure; LOCKSS: A Permanent Web Publishing and Access System; Tapestry of Time and Terrain.  

Science.gov (United States)

Includes five articles. Topics include requirements for a content standard to describe computational models; architectures for digital rights management systems; access control for digital information objects; LOCKSS (Lots of Copies Keep Stuff Safe) that allows libraries to run Web caches for specific journals; and a Web site from the U.S.…

Hill, Linda L.; Crosier, Scott J.; Smith, Terrence R.; Goodchild, Michael; Iannella, Renato; Erickson, John S.; Reich, Vicky; Rosenthal, David S. H.

2001-01-01

340

Design architecture for multi-zone HVAC control systems from existing single-zone systems using wireless sensor networks  

Science.gov (United States)

Most residential heating, ventilating, and air-conditioning (HVAC) systems utilize a single zone for conditioning air throughout the entire house. While inexpensive, these systems lead to wide temperature distributions and inefficient cooling due to the difference in thermal loads in different rooms. The end result is additional cost to the end user because the house is over conditioned. To reduce the total amount of energy used in a home and to increase occupant comfort there is a need for a better control system using multiple temperature zones. Typical multi-zone systems are costly and require extensive infrastructure to function. Recent advances in wireless sensor networks (WSNs) have enabled a low cost drop-in wireless vent register control system. The register control system is controlled by a master controller unit, which collects sensor data from a distributed wireless sensor network. Each sensor node samples local settings (occupancy, light, humidity and temperature) and reports the data back to the master control unit. The master control unit compiles the incoming data and then actuates the vent resisters to control the airflow throughout the house. The control system also utilizes a smart thermostat with a movable set point to enable the user to define their given comfort levels. The new system can reduce the run time of the HVAC system and thus decreasing the amount of energy used and increasing the comfort of the home occupations.

Redfern, Andrew; Koplow, Michael; Wright, Paul

2007-01-01

 
 
 
 
341

ANALYSING AN INDUSTRIAL AUTOMATION PYRAMID AND PROVIDING SERVICE ORIENTED ARCHITECTURE  

Directory of Open Access Journals (Sweden)

Full Text Available — Industrial automation platforms are experiencing a paradigm shift. New technologies are making their way in the area, including embedded real-time systems, standard local area networks like Ethernet, Wi-Fi and ZigBee, IP-based communication protocols, standard Service Oriented Architectures (SOAs and Web Services. The introduction of these new technologies raises important problems that need to be properly solved, one of these being the need to support real-time and quality-of-service (caps for real-time applications. This paper describes a SOA enhanced with real-time capabilities for Industrial Automation. The proposed architecture allows for negotiation of the caps requested by this paper describe the different stages of automation from field devices sensors to remote operator desk and also describe the architecture of a system

Shivani Kumra #1 , Laxman sharma#2 , Yashvi Khanna#3 , Abhishek Chattri #4

2012-10-01

342

Use of ebRIM-based CSW with sensor observation services for registry and discovery of remote-sensing observations  

Science.gov (United States)

Recent advances in Sensor Web geospatial data capture, such as high-resolution in satellite imagery and Web-ready data processing and modeling technologies, have led to the generation of large numbers of datasets from real-time or near real-time observations and measurements. Finding which sensor or data complies with criteria such as specific times, locations, and scales has become a bottleneck for Sensor Web-based applications, especially remote-sensing observations. In this paper, an architecture for use of the integration Sensor Observation Service (SOS) with the Open Geospatial Consortium (OGC) Catalogue Service-Web profile (CSW) is put forward. The architecture consists of a distributed geospatial sensor observation service, a geospatial catalogue service based on the ebXML Registry Information Model (ebRIM), SOS search and registry middleware, and a geospatial sensor portal. The SOS search and registry middleware finds the potential SOS, generating data granule information and inserting the records into CSW. The contents and sequence of the services, the available observations, and the metadata of the observations registry are described. A prototype system is designed and implemented using the service middleware technology and a standard interface and protocol. The feasibility and the response time of registry and retrieval of observations are evaluated using a realistic Earth Observing-1 (EO-1) SOS scenario. Extracting information from SOS requires the same execution time as record generation for CSW. The average data retrieval response time in SOS+CSW mode is 17.6% of that of the SOS-alone mode. The proposed architecture has the more advantages of SOS search and observation data retrieval than the existing sensor Web enabled systems.

Chen, Nengcheng; Di, Liping; Yu, Genong; Gong, Jianya; Wei, Yaxing

2009-02-01

343

Implementation and Performance of a GPS/INS Tightly Coupled Assisted PLL Architecture Using MEMS Inertial Sensors  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The use of global navigation satellite system receivers for navigation still presents many challenges in urban canyon and indoor environments, where satellite availability is typically reduced and received signals are attenuated. To improve the navigation performance in such environments, several enhancement methods can be implemented. For instance, external aid provided through coupling with other sensors has proven to contribute substantially to enhancing navigation performance and robustne...

Youssef Tawk; Phillip Tomé; Cyril Botteron; Yannick Stebler; Pierre-André Farine

2014-01-01

344

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.

Alvaro Suarez

2012-02-01

345

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

346

GOOSE: semantic search on internet connected sensors  

Science.gov (United States)

More and more sensors are getting Internet connected. Examples are cameras on cell phones, CCTV cameras for traffic control as well as dedicated security and defense sensor systems. Due to the steadily increasing data volume, human exploitation of all this sensor data is impossible for effective mission execution. Smart access to all sensor data acts as enabler for questions such as "Is there a person behind this building" or "Alert me when a vehicle approaches". The GOOSE concept has the ambition to provide the capability to search semantically for any relevant information within "all" (including imaging) sensor streams in the entire Internet of sensors. This is similar to the capability provided by presently available Internet search engines which enable the retrieval of information on "all" web pages on the Internet. In line with current Internet search engines any indexing services shall be utilized cross-domain. The two main challenge for GOOSE is the Semantic Gap and Scalability. The GOOSE architecture consists of five elements: (1) an online extraction of primitives on each sensor stream; (2) an indexing and search mechanism for these primitives; (3) a ontology based semantic matching module; (4) a top-down hypothesis verification mechanism and (5) a controlling man-machine interface. This paper reports on the initial GOOSE demonstrator, which consists of the MES multimedia analysis platform and the CORTEX action recognition module. It also provides an outlook into future GOOSE development.

Schutte, Klamer; Bomhof, Freek; Burghouts, Gertjan; van Diggelen, Jurriaan; Hiemstra, Peter; van't Hof, Jaap; Kraaij, Wessel; Pasman, Huib; Smith, Arthur; Versloot, Corne; de Wit, Joost

2013-05-01

347

A universal approach to electrically connecting nanowire arrays using nanoparticles-application to a novel gas sensor architecture  

International Nuclear Information System (INIS)

We report on a novel, in situ approach toward connecting and electrically contacting vertically aligned nanowire arrays using conductive nanoparticles. The utility of the approach is demonstrated by development of a gas sensing device employing this nano-architecture. Well-aligned, single-crystalline zinc oxide nanowires were grown through a direct thermal evaporation process at 550 deg. C on gold catalyst layers. Electrical contact to the top of the nanowire array was established by creating a contiguous nanoparticle film through electrostatic attachment of conductive gold nanoparticles exclusively onto the tips of nanowires. A gas sensing device was constructed using such an arrangement and the nanowire assembly was found to be sensitive to both reducing (methanol) and oxidizing (nitrous oxides) gases. This assembly approach is amenable to any nanowire array for which a top contact electrode is needed

348

Sensors Weekly  

Science.gov (United States)

This is are very active web site devoted to the emerging technology area of sensors. It is updated continously, with technical articles, resources, and news about advances and new applications of sensor technology. It has seven major focus areas that are covered: electronics & computers, machine manufacturing, process industries, automotive, aerospace/military/homeland security, specialty markets, and wireless & M2M. This is an excellent source of up-to-date information about this technical area.

2011-02-23

349

Ajax Architecture Implementation Techniques  

Science.gov (United States)

Today's rich Web applications use a mix of Java Script and asynchronous communication with the application server. This mechanism is also known as Ajax: Asynchronous JavaScript and XML. The intent of Ajax is to exchange small pieces of data between the browser and the application server, and in doing so, use partial page refresh instead of reloading the entire Web page. AJAX (Asynchronous JavaScript and XML) is a powerful Web development model for browser-based Web applications. Technologies that form the AJAX model, such as XML, JavaScript, HTTP, and XHTML, are individually widely used and well known. However, AJAX combines these technologies to let Web pages retrieve small amounts of data from the server without having to reload the entire page. This capability makes Web pages more interactive and lets them behave like local applications. Web 2.0 enabled by the Ajax architecture has given rise to a new level of user interactivity through web browsers. Many new and extremely popular Web applications have been introduced such as Google Maps, Google Docs, Flickr, and so on. Ajax Toolkits such as Dojo allow web developers to build Web 2.0 applications quickly and with little effort.

Hussaini, Syed Asadullah; Tabassum, S. Nasira; Baig, Tabassum, M. Khader

2012-03-01

350

A Column-Parallel Hybrid Analog-to-Digital Converter Using Successive-Approximation-Register and Single-Slope Architectures with Error Correction for Complementary Metal Oxide Silicon Image Sensors  

Science.gov (United States)

In this paper, a column-parallel hybrid analog-to-digital converter (ADC) architecture taking the advantages of both successive-approximation-register (SAR) and single-slope (SS) architectures has been developed for CMOS image sensors. The proposed architecture achieves high conversion speed and low power consumption without requiring a high clock frequency and a large number of capacitors. Moreover, an error correction methodology has been presented to calibrate capacitance mismatches in a SAR capacitor array for linearity improvement. An 11-bit hybrid prototype ADC has been implemented in a 0.18-µm 1-poly 5-metal standard CMOS process. The conversion time is 1.225 µs with a maximum operation clock frequency of 40 MHz and it consumes 48 µW. With the proposed error correction, the measured differential nonlinearity (DNL) and integral nonlinearity (INL) are +0.40/-0.44 least significant bit (LSB) and +1.21/-1.12 LSB, respectively.

Li, Tsung-Ling; Sakai, Shin; Kawada, Shun; Goda, Yasuyuki; Wakashima, Shunichi; Kuroda, Rihito; Sugawa, Shigetoshi

2013-04-01

351

Adaptation of Web services to the context based on workflow: Approach for self-adaptation of service-oriented architectures to the context  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The emergence of Web services in the information space, as well as the advanced technology of SOA, give tremendous opportunities for users in an ambient space or distant, empowerment and organizations in various 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 servic...

Faical Felhi; Jalel Akaichi

2012-01-01

352

Flexible Architecture of Ultra-Low-Power Current-Mode Interleaved Successive Approximation Analog-to-Digital Converter for Wireless Sensor Networks  

Directory of Open Access Journals (Sweden)

Full Text Available A novel 8-bit current mode interleaved successive approximation (SAR analog-digital converter (ADC has been proposed. The proposed converter architecture is very flexible. Using two control DC voltages and one reference current, the converter can be tuned to work with different sampling rates, number of bits of resolution, and power consumption levels. Due to its very low-power consumption and flexibility, the converter is particularly suitable for application in wireless sensor networks. Compared to other solutions presented in the literature, the proposed converter achieves very high figure of merit (FOM value due to numerous low-power circuit innovations utilized in its design. The circuit has been implemented in CMOS 0.18 μm technology. Minimum energy consumption has been found to be in a 25–250 kS/s range (for clock sampling frequency in a 200 kHz--2 MHz range for a single SAR section with the corresponding power dissipation varying from 220 nW to 560 nW for 0.55 V power supply.

K. Iniewski

2007-06-01

353

Smews: Smart and Mobile Embedded Web Server  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In this paper, we show that Web protocols and technologies are good candidates to design the Internet of Things, through a user-centric architecture (the user simply has to use a standard Web browser). We detail how this Web of Things can handle typical embedded devices interaction needs. We discuss the technical feasibility of embedded Web servers, and, thanks to an analysis of the Web protocols, we propose new cross-layer solutions for efficient tiny embedded Web servers design. The problem...

Duquennoy, Simon; Grimaud, Gilles; Vandewalle, Jean-jacques

2009-01-01

354

Design and Characterisation of a Fast Architecture Providing Zero Suppressed Digital Output Integrated in a High Resolution CMOS Pixel Sensor for the STAR Vertex Detector and the EUDET Beam Telescope  

CERN Document Server

CMOS Monolithic Active Pixel Sensors (MAPS) have demonstrated their strong potential for tracking devices, particularly for flavour tagging. They are foreseen to equip several vertex detectors and beam telescopes. Most applications require high read-out speed, imposing sensors to feature digital output with integrated zero suppression. The most recent development of MAPS at IPHC and IRFU addressing this issue will be reviewed. An architecture will be presented, combining a pixel array, column-level discriminators and zero suppression circuits. Each pixel features a preamplifier and a correlated double sampling (CDS) micro-circuit reducing the temporal and fixed pattern noises. The sensor is fully programmable and can be monitored. It will equip experimental apparatus starting data taking in 2009/2010.

Hu-guo, C

2008-01-01

355

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

356

An Architecture of ULP Energy Harvesting Power Conditioning Circuit Using Piezoelectric Transducer for Wireless Sensor Network: A Review  

Directory of Open Access Journals (Sweden)

Full Text Available Energy harvesting system converts ambient energy (examples: vibration, light, temperature and wind, etc. into useable electrical energy. This system can replace the function of battery for small Ultra-Low-Power (ULP electronic devices. The slag of batteries is harmful to the environment as well as hazardous to human health. Recent research trends in energy harvesting systems are extracting maximum energy from wind energy using piezoelectric cantilever. This study presents the development of a Power Conditioning Circuit (PCC for maximum harvested energy by using piezoelectric transducers. To achieve this, a self-PCC consisting of voltage doubler, charge pump, DC-DC converter and bypass path was designed. The output from the piezoelectric transducer is an AC voltage. To rectify the piezoelectric output, the voltage doubler was performed. Initially, the capacitor was charged via a bypass path. Once, the storage charge of the capacitor is sufficient to run the Microcontroller unit, this unit will stop the bypass path and on the active path. A low power Microcontroller was used for coding Maximum Power Point Tracking (MPPT algorithm. The system modeling, design and analysis of the proposed PCC energy harvesting was simulated in active components using PSPICE software and later on the MPPT algorithm was coded in MATLAB. Then the PSPICE simulation and MPPT code was integrated for evaluating the system performance. Finally, a self-powered and fully autonomous energy harvesting power conditioning circuit layout was designed in 0.13 ?m CMOS technology under Mentor Graphics. This PCC will ensure sufficient power to drive electronic devices such as Wireless Sensor Network (WSN, hearing aid, electronic watchand calculator, etc. This battery less ULP energy harvester capable to harvest maximum 24 mW power with an expected efficiency of 90% and output voltage of 3 V from low ambient sources of 500 mV at start up. Also, this ULP energy harvesting system reducing power consumption as compared to the conventional approaches.

D.M. Motiur Rahaman

2015-01-01

357

The Exploitation of Data from Remote and Human Sensors for Environment Monitoring in the SMAT Project  

Science.gov (United States)

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. PMID:23247415

Meo, Rosa; Roglia, Elena; Bottino, Andrea

2012-01-01

358

Service-oriented high level architecture  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 Developmen...

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

2009-01-01

359

Art & Architecture  

Science.gov (United States)

This website was created by the Courtauld Institute of Art, a British institute created for the study of Western art. The website is "designed to be explored," and with over 40,000 images and a network of over 500,000 links, there's a great deal to explore. Because of the vast amount of content, visitors might find it helpful to first check out the link at the bottom of the page, entitled "About A&A". From there, click on the "How to Use the Art & Architecture Web Site". This extremely useful link has over a dozen categories of instruction, from "Basics" to "Search Tips" to "Profile and Preferences". The "Quizzes, Polls and Discussions" section on the left hand side of the page is a clever section with quizzes, such as those on the value of watercolors and polls. On the right hand side of the page the "Stories" area contains transcripts of fascinating interviews with artists and architects.

360

Web Usage Mining using Improved FP Tree Algorithm with Customized Web Log Preprocessing  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web Usage Mining mines Web access logs for interesting pat-terns in WWW traffic. Web Usage Mining discovers interesting patterns in accesses to various Web pages within the Web space associated with a particular server. The Web Usage Mining architecture divides the process into two main parts- the first part includes preprocessing, transaction identification, and data integration components. The second part includes the largely domain independent application of generic data mining and pattern...

Prateek Gupta; Surendra Mishra

2011-01-01

 
 
 
 
361

WEB SERVICES FOR MOBILE COMPUTING  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 mid...

Piyush M Patil, Kushal Gohil

2012-01-01

362

Principles and Model for Web Dataspace  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web information integrated management system requires a powerful and versatile data model that is able to represent a highly heterogeneous mix of data such as web pages, XML, deep web, files, etc. It requires access to both structured and unstructured data. Such collections of data have been referred to as dataspace. In order to build a web dataspace support platform, we described some principles. According to these principles, we design architecture for the web dataspace support platform. Ba...

Zhengtao Liu; Jiandong Wang

2013-01-01

363

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

2013-09-01

364

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

365

Miniaturized wireless sensor network  

CERN Document Server

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

366

Wireless Sensor Networks Approach  

Science.gov (United States)

This viewgraph presentation provides information on hardware and software configurations for a network architecture for sensors. The hardware configuration uses a central station and remote stations. The software configuration uses the 'lost station' software algorithm. The presentation profiles a couple current examples of this network architecture in use.

Perotti, Jose M.

2003-01-01

367

Web Resources Annotation for the Web of Learning  

Directory of Open Access Journals (Sweden)

Full Text Available Semantic annotation of web resources is an essential ingredient to leverage the web of information to the semantic web where resources are easily shared and reused. In the education field, reusing hypermedia web resources can support to a great deal the design of modern instructional environments and the development of interactive and non-linear material for learning. Sharing and reusing these resources by different web applications and services presupposes that they are visible for retrieval through a semantic description of their content, function and relations with other resources. This paper presents the annotation and discovery of web resources to create learning objects that constitute the building blocks of learning sessions which are delivered to users in the Web of Learning. Semantic annotation is done by the contextual exploration method which analyzes web resources’ text descriptions and metadata in order to annotate automatically resources. We present the system architecture and a case study that illustrates the proposed approach.

Jawad Berri

2013-12-01

368

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

369

Robot Electronics Architecture  

Science.gov (United States)

An electronics architecture has been developed to enable the rapid construction and testing of prototypes of robotic systems. This architecture is designed to be a research vehicle of great stability, reliability, and versatility. A system according to this architecture can easily be reconfigured (including expanded or contracted) to satisfy a variety of needs with respect to input, output, processing of data, sensing, actuation, and power. The architecture affords a variety of expandable input/output options that enable ready integration of instruments, actuators, sensors, and other devices as independent modular units. The separation of different electrical functions onto independent circuit boards facilitates the development of corresponding simple and modular software interfaces. As a result, both hardware and software can be made to expand or contract in modular fashion while expending a minimum of time and effort.

Garrett, Michael; Magnone, Lee; Aghazarian, Hrand; Baumgartner, Eric; Kennedy, Brett

2008-01-01

370

Collaborative web hosting challenges and research directions  

CERN Document Server

This brief presents a peer-to-peer (P2P) web-hosting infrastructure (named pWeb) that can transform networked, home-entertainment devices into lightweight collaborating Web servers for persistently storing and serving multimedia and web content. The issues addressed include ensuring content availability, Plexus routing and indexing, naming schemes, web ID, collaborative web search, network architecture and content indexing. In pWeb, user-generated voluminous multimedia content is proactively uploaded to a nearby network location (preferably within the same LAN or at least, within the same ISP)

Ahmed, Reaz

2014-01-01

371

Wireless Sensors Network (Sensornet)  

Science.gov (United States)

The Wireless Sensor Network System presented in this paper provides a flexible reconfigurable architecture that could be used in a broad range of applications. It also provides a sensor network with increased reliability; decreased maintainability costs, and assured data availability by autonomously and automatically reconfiguring to overcome communication interferences.

Perotti, J.

2003-01-01

372

Terra Harvest software architecture  

Science.gov (United States)

Under the Terra Harvest Program, the DIA has the objective of developing a universal Controller for the Unattended Ground Sensor (UGS) community. The mission is to define, implement, and thoroughly document an open architecture that universally supports UGS missions, integrating disparate systems, peripherals, etc. The Controller's inherent interoperability with numerous systems enables the integration of both legacy and future UGS System (UGSS) components, while the design's open architecture supports rapid third-party development to ensure operational readiness. The successful accomplishment of these objectives by the program's Phase 3b contractors is demonstrated via integration of the companies' respective plug-'n'-play contributions that include controllers, various peripherals, such as sensors, cameras, etc., and their associated software drivers. In order to independently validate the Terra Harvest architecture, L-3 Nova Engineering, along with its partner, the University of Dayton Research Institute, is developing the Terra Harvest Open Source Environment (THOSE), a Java Virtual Machine (JVM) running on an embedded Linux Operating System. The Use Cases on which the software is developed support the full range of UGS operational scenarios such as remote sensor triggering, image capture, and data exfiltration. The Team is additionally developing an ARM microprocessor-based evaluation platform that is both energy-efficient and operationally flexible. The paper describes the overall THOSE architecture, as well as the design decisions for some of the key software components. Development process for THOSE is discussed as well.

Humeniuk, Dave; Klawon, Kevin

2012-06-01

373

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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...

Padma, S.; Ananthi Seshasaayee

2012-01-01

374

DEVELOPMENT OF SECURE RESTFUL WEB SERVICES IN JAVA  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In this thesis we examined and described RESTful web services and the principles of the architectural style REST on which they are based on. We compared RESTful web services to web services based on the SOAP protocol and studied the security aspect of web services. We analyzed the most common approaches and mechanisms for ensuring security of RESTful web services. We applied the knowledge gained thus far on a prototype implementation of a web store in Java. Furthermore, we comapred the level...

Panic?, Gregor

2012-01-01

375

An ad hoc wireless sensor network for tele medicine applications  

International Nuclear Information System (INIS)

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)

376

Integrating dynamic resources in corporate semantic web: an approach to enterprise application integration using semantic web services  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We present our experiment in integrating semantic web services in the existing semantic web server architecture used by the ACACIA team to implement corporate memories. We rely on CORESE, a semantic web search engine, to provide web applications based on the semantic web services it can identify. Thus, CORESE is used as a semantic UDDI registry and allows us to automatically discover and invoke corporate applications wrapped into semantically annotated web services. Using rules and an extensi...

Lo, Moussa; Gandon, Fabien

2006-01-01

377

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

378

Application specific web log pre-processing  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web Usage Mining discovers interesting patterns in accesses to various Web pages within the Web space associated with a particular server. The Web Usage Mining architecture divides the process into two main parts- the first part includes pre-processing, transaction identification, and data integration components. The second part includes the largely domain independent application of generic data mining and pattern matching. Nearly 80% of mining efforts often spend to improve the quality of da...

Ravindra Gupta; Prateek Gupta

2012-01-01

379

Process-aware web programming with Jolie  

Digital Repository Infrastructure Vision for European Research (DRIVER)

We present a programming language and runtime, which extends the Jolie programming language, for the native modelling of process-aware web information systems, i.e., web information systems based upon the execution of business processes. Our main contribution is to offer a unifying approach for the programming of distributed architectures on the web, which can capture web servers, stateful process execution, and the composition of services via mediation in a system. We discu...

Montesi, Fabrizio

2014-01-01

380

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 th...

Padma, S.; Seshasaayee, Ananthi

2012-01-01

 
 
 
 
381

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

382

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

2010-05-01

383

SWI-Prolog and the Web  

CERN Document Server

Where Prolog is commonly seen as a component in a Web application that is either embedded or communicates using a proprietary protocol, we propose an architecture where Prolog communicates to other components in a Web application using the standard HTTP protocol. By avoiding embedding in external Web servers development and deployment become much easier. To support this architecture, in addition to the transfer protocol, we must also support parsing, representing and generating the key Web document types such as HTML, XML and RDF. This paper motivates the design decisions in the libraries and extensions to Prolog for handling Web documents and protocols. The design has been guided by the requirement to handle large documents efficiently. The described libraries support a wide range of Web applications ranging from HTML and XML documents to Semantic Web RDF processing. To appear in Theory and Practice of Logic Programming (TPLP)

Wielemaker, Jan; van der Meij, Lourens

2007-01-01

384

Architectural Contestation:  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This dissertation addresses the reductive reading of Georges Bataille's work done within the field of architectural criticism and theory which tends to set aside the fundamental ‘broken’ totality of Bataille's oeuvre and also to narrowly interpret it as a mere critique of architectural form, consequently presenting it either as the negation of all form of architecture or as the critique of 'classical' architectural forms. Against this ‘appropriation’, i.e. this reductive reading an...

Merle, J.

2012-01-01

385

Charlotte's Web  

Science.gov (United States)

Similar to how Charlotte uses her web to communicate, students create webs for short messages. They learn how spiders create their webs, and about the different types of webs they make. With this knowledge, students design and create their own webs and incorporate messages.

Center for Engineering Educational Outreach,

386

Mosaic Web Browser Celebrates 10th Birthday  

Science.gov (United States)

... Vinton Cerf, senior vice president of Architecture and Technology for WorldCom; Rick Rashid, senior ... that allowed programmers to post images, sound, video clips, and multi-font text within the Web's ...

387

The Sensor Revolution  

Science.gov (United States)

A sensor is any device that can take a stimulus, such as heat, light, magnetism, or exposure to a particular chemical, and convert it to a signal.While the concept of sensors is nothing new, the technology of sensors is undergoing a rapid transformation resulting in sensors that are smaller, smarter, and more mobile. NSF-funded researchers are pursuing solutions to all these challenges and moreâas are researchers supported by other agencies, and by industry. This web site contains examples from Environment & Civil Infrastructure, Industry & Commerce, Health and Safety & Security.

388

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

2012-10-01

389

Excitation and lasing of whispering gallery modes in dye doped microspheres at the tip of a microstructured optical fiber and application for a sensitive dip sensor architecture  

Science.gov (United States)

A new concept for exciting whispering gallery modes (WGMs) using small core microstructured optical fibers (MOFs) is presented. Here a 10 ?m spherical dye doped micro resonator was positioned onto the tip of the MOF, and the application of this device for refractive index sensing applications is presented. With this configuration, both the excitation and collection efficiency of the WGM modulated fluorescence spectra of the dye are found to be greatly improved compared to the more traditional excitation scheme in which the resonator is attached to a glass slide and excited using a confocal microscope. This novel MOF-tip configuration provides a more compact and robust architecture for in vivo/vitro biosensing applications. It is also shown that the same architecture can be used to operate the dye doped resonator beyond its lasing threshold, resulting in improved performances.

Rowland, Kristopher J.; François, Alexandre; Monro, Tanya M.

2012-01-01

390

HoCaMA: Home Care Hybrid Multiagent Architecture  

Science.gov (United States)

Home Care is one of the main objectives of Ambient Intelligence. Nowadays, the disabled and elderly population, which represents a significant part of our society, requires novel solutions for providing home care in an effective way. In this chapter, we present HoCaMA, a hybrid multiagent architecture that facilitates remote monitoring and care services for disabled patients at their homes. HoCaMA combines multiagent systems and Web services to facilitate the communication and integration with multiple health care systems. In addition, HoCaMA focuses on the design of reactive agents capable of interacting with different sensors present in the environment, and incorporates a system of alerts through SMS and MMS mobile technologies. Finally, it uses Radio Frequency IDentification and JavaCard technologies to provide advanced location and identification systems, as well as automatic access control facilities. HoCaMA has been implemented in a real environment and the results obtained are presented within this chapter.

Fraile, Juan A.; Bajo, Javier; Abraham, Ajith; Corchado, Juan M.

391

Probabilistic Semantic Web Mining Using Artificial Neural Analysis  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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...

Krishna Kishore, T.; Sasi Vardhan, T.; Lakshmi Narayana, N.

2010-01-01

392

Web services for distributed and interoperable hydro-information systems  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Web services support the integration and interoperability of Web-based applications and enable machine-to-machine interaction. The concepts of web services and open distributed architecture were applied to the development of T-DSS, the prototype customised for web based hydro-information systems. T-DSS provides mapping services, database related services and access to remote components, with special emphasis placed on the output flexibility (e.g. multilingualism), where SOAP web services are ...

Horak, J.; Orlik, A.; Stromsky, J.

2008-01-01

393

Smart Chemical Sensors: Concepts and Application  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This PhD thesis introduces basic concepts of smart chemical sensors design, which are afterwards applied to a particular application: the analysis of natural gas. The thesis addresses thus two sets of objective, a first set of objectives related to the conceptual design of a smart chemical sensor using smart sensor standards: - The design of an optimal smart chemical sensor architecture - The novel combination in a working prototype of the highly complementary smart sensor stan...

Udina Oliva, Sergi

2012-01-01

394

Pervasive Monitoring—An Intelligent Sensor Pod Approach for Standardised Measurement Infrastructures  

Directory of Open Access Journals (Sweden)

Full Text Available 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.

Michael Lippautz

2010-12-01

395

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 overall speed performance. CMOS (complementary-metal- oxide-semiconductor) technology enables on-chip integration of several analog and digital circuitry. The sensor performance depends on the fea...

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

2002-01-01

396