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Sample records for based dynamic service

  1. Study on dynamic services composition of web services based on BPEL

    NASA Astrophysics Data System (ADS)

    Gao, Jinyue; Huang, Fei; Zhang, Gongxuan

    2013-12-01

    From the core concepts of SOA (Service-Oriented Architecture) ——"Service" starting the service composition is discussed in detail, from the service relationships network modeling, services dynamic composition approach based on Business Process Execution Language BPEL (Business Process Execution Language) is proposed in this paper, meanwhile two concepts of service agent and service quality are described, which achieve the service process dynamic execution.

  2. Dynamic Evolution Model Based on Social Network Services

    NASA Astrophysics Data System (ADS)

    Xiong, Xi; Gou, Zhi-Jian; Zhang, Shi-Bin; Zhao, Wen

    2013-11-01

    Based on the analysis of evolutionary characteristics of public opinion in social networking services (SNS), in the paper we propose a dynamic evolution model, in which opinions are coupled with topology. This model shows the clustering phenomenon of opinions in dynamic network evolution. The simulation results show that the model can fit the data from a social network site. The dynamic evolution of networks accelerates the opinion, separation and aggregation. The scale and the number of clusters are influenced by confidence limit and rewiring probability. Dynamic changes of the topology reduce the number of isolated nodes, while the increased confidence limit allows nodes to communicate more sufficiently. The two effects make the distribution of opinion more neutral. The dynamic evolution of networks generates central clusters with high connectivity and high betweenness, which make it difficult to control public opinions in SNS.

  3. An Approach on Dynamic Geospaital Information Service Composition Based on Context Relationship

    NASA Astrophysics Data System (ADS)

    Cheng, D.; Wang, F.

    2011-08-01

    For the new demand of dynamic integration of spatial data, the model and collaboration of processing functions caused by characteristics of dynamic interaction and the participants random demand for information in geo-collaboration work system, for instance, during on-line consultation meeting, the paper presented an approach considering context dynamic service composition information. Firstly, the paper introduced the dividing method of context relation in consultation from the user and GI services, interaction between services and service perspective, constructed GI service context relation, and established GI service description model considering service's context relation based on OWL-S. For the problems above, the paper proposed an approach on GI service dynamic composition based on context relationship. Then, the paper provided a framework for GI services dynamic composition, and discussed every important component of framework. Finally, an experiment about checking illegal construction on boundary was implemented to illustrate the concepts and ideas discussed in the paper.

  4. Dynamic and Quantitative Method of Analyzing Service Consistency Evolution Based on Extended Hierarchical Finite State Automata

    PubMed Central

    Fan, Linjun; Tang, Jun; Ling, Yunxiang; Li, Benxian

    2014-01-01

    This paper is concerned with the dynamic evolution analysis and quantitative measurement of primary factors that cause service inconsistency in service-oriented distributed simulation applications (SODSA). Traditional methods are mostly qualitative and empirical, and they do not consider the dynamic disturbances among factors in service's evolution behaviors such as producing, publishing, calling, and maintenance. Moreover, SODSA are rapidly evolving in terms of large-scale, reusable, compositional, pervasive, and flexible features, which presents difficulties in the usage of traditional analysis methods. To resolve these problems, a novel dynamic evolution model extended hierarchical service-finite state automata (EHS-FSA) is constructed based on finite state automata (FSA), which formally depict overall changing processes of service consistency states. And also the service consistency evolution algorithms (SCEAs) based on EHS-FSA are developed to quantitatively assess these impact factors. Experimental results show that the bad reusability (17.93% on average) is the biggest influential factor, the noncomposition of atomic services (13.12%) is the second biggest one, and the service version's confusion (1.2%) is the smallest one. Compared with previous qualitative analysis, SCEAs present good effectiveness and feasibility. This research can guide the engineers of service consistency technologies toward obtaining a higher level of consistency in SODSA. PMID:24772033

  5. Dynamic and quantitative method of analyzing service consistency evolution based on extended hierarchical finite state automata.

    PubMed

    Fan, Linjun; Tang, Jun; Ling, Yunxiang; Li, Benxian

    2014-01-01

    This paper is concerned with the dynamic evolution analysis and quantitative measurement of primary factors that cause service inconsistency in service-oriented distributed simulation applications (SODSA). Traditional methods are mostly qualitative and empirical, and they do not consider the dynamic disturbances among factors in service's evolution behaviors such as producing, publishing, calling, and maintenance. Moreover, SODSA are rapidly evolving in terms of large-scale, reusable, compositional, pervasive, and flexible features, which presents difficulties in the usage of traditional analysis methods. To resolve these problems, a novel dynamic evolution model extended hierarchical service-finite state automata (EHS-FSA) is constructed based on finite state automata (FSA), which formally depict overall changing processes of service consistency states. And also the service consistency evolution algorithms (SCEAs) based on EHS-FSA are developed to quantitatively assess these impact factors. Experimental results show that the bad reusability (17.93% on average) is the biggest influential factor, the noncomposition of atomic services (13.12%) is the second biggest one, and the service version's confusion (1.2%) is the smallest one. Compared with previous qualitative analysis, SCEAs present good effectiveness and feasibility. This research can guide the engineers of service consistency technologies toward obtaining a higher level of consistency in SODSA.

  6. Business Models of E-Government: Research on Dynamic E-Government Based on Web Services

    NASA Astrophysics Data System (ADS)

    Li, Yan; Yang, Jiumin

    Government transcends all sectors in a society. It provides not only the legal, political and economic infrastructure to support other sectors, but also exerts significant influence on the social factors that contribute to their development. With its maturity of technologies and management, e-government will eventually enter into the time of 'one-stop' services. Among others, the technology of Web services is the major contributor to this achievement. Web services provides a new way of standard-based software technology, letting programmers combine existing computer system in new ways over the Internet within one business or across many, and would thereby bring about profound and far-reaching impacts on e-government. This paper introduced the business modes of e-government, architecture of dynamic e-government and its key technologies. Finally future prospect of dynamic e-government was also briefly discussed.

  7. A Middleware Based Approach to Dynamically Deploy Location Based Services onto Heterogeneous Mobile Devices Using Bluetooth in Indoor Environment

    NASA Astrophysics Data System (ADS)

    Sadhukhan, Pampa; Sen, Rijurekha; Das, Pradip K.

    Several methods for providing location based service (LBS) to mobile devices in indoor environment using wireless technologies like WLAN, RFID and Bluetooth have been proposed, implemented and evaluated. However, most of them do not focus on heterogeneity of mobile platforms, memory constraint of mobile devices, the adaptability of client or device to the new services it discovers whenever it reaches a new location. In this paper, we have proposed a Middleware based approach of LBS provision in the indoor environment, where a Bluetooth enabled Base Station (BS) detects Bluetooth enabled mobile devices and pushes a proper client application only to those devices that belong to some registered subscriber of LBS. This dynamic deployment enables the mobile clients to access any new service without having preinstalled interface to that service beforehand and thus the client's memory consumption is reduced. Our proposed work also addresses the other issues like authenticating the clients before providing them LBSs and introducing paid services. We have evaluated its performance in term of file transfer time with respect to file size and throughput with respect to distance. Experimental results on service consumption time by the mobile client for different services are also presented.

  8. MonALISA: An agent based, dynamic service system to monitor, control and optimize distributed systems

    NASA Astrophysics Data System (ADS)

    Legrand, I.; Newman, H.; Voicu, R.; Cirstoiu, C.; Grigoras, C.; Dobre, C.; Muraru, A.; Costan, A.; Dediu, M.; Stratan, C.

    2009-12-01

    The MonALISA (Monitoring Agents in a Large Integrated Services Architecture) framework provides a set of distributed services for monitoring, control, management and global optimization for large scale distributed systems. It is based on an ensemble of autonomous, multi-threaded, agent-based subsystems which are registered as dynamic services. They can be automatically discovered and used by other services or clients. The distributed agents can collaborate and cooperate in performing a wide range of management, control and global optimization tasks using real time monitoring information. Program summaryProgram title: MonALISA Catalogue identifier: AEEZ_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEEZ_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Caltech License - free for all non-commercial activities No. of lines in distributed program, including test data, etc.: 147 802 No. of bytes in distributed program, including test data, etc.: 2 5913 689 Distribution format: tar.gz Programming language: Java, additional APIs available in Java, C, C++, Perl and python Computer: Computing Clusters, Network Devices, Storage Systems, Large scale data intensive applications Operating system: The MonALISA service is mainly used in Linux, the MonALISA client runs on all major platforms (Windows, Linux, Solaris, MacOS). Has the code been vectorized or parallelized?: It is a multithreaded application. It will efficiently use all the available processors. RAM: for the MonALISA service the minimum required memory is 64 MB; if the JVM is started allocating more memory this will be used for internal caching. The MonALISA client requires typically 256-512 MB of memory. Classification: 6.5 External routines: Requires Java: JRE or JDK to run. These external packages are used (they are included in the distribution): JINI, JFreeChart, PostgreSQL (optional). Nature of problem: To monitor and control

  9. Dynamic evaluation of ecosystem service value of the riparian zone based on remote sensing from 1986 to 2012

    NASA Astrophysics Data System (ADS)

    Fu, B. L.; Li, Y.; Zhang, B.; Yin, B. S.; Zhu, H. L.; Xing, Z. F.

    2015-08-01

    In this paper, we calculated comparable and dynamic ecosystem service value per unit area in the riparian zone of Second Songhua River; then we also estimated changes in the value of ecosystem services resulting from land use changes; finally, we continuously evaluated the riparian ecosystem service value based on 520 basic evaluation units (BEUs) and explored the trend of the riparian ecosystem service value from 1986 to 2012. The results indicated that comparable economic values of per unit area food production of farmland ecosystems in 2012 almost increased three times more than that in 1986 from 154.83 to 382.45 ha-1; the people's willingness to pay for farmland ecosystem services increased from 0.24 in 1986 to 0.48 in 2012; the land areas supporting the environment and society generally declined, whereas areas of farmland significantly increased from 1986 to 2012; the riparian total ecosystem service value increased from 42.30 million in 1986 to 119.67 million in 2012, with an average increase rate of 4.06 % yr-1; the ecosystem service value of four reaches all have seen a sharp increase from 1986 to 2012; the average ecosystem service value of a reach was the smallest one in the four reaches, and the value of c and d reach was significantly more than other two reaches.

  10. Sink-oriented Dynamic Location Service Protocol for Mobile Sinks with an Energy Efficient Grid-Based Approach

    PubMed Central

    Jeon, Hyeonjae; Park, Kwangjin; Hwang, Dae-Joon; Choo, Hyunseung

    2009-01-01

    Sensor nodes transmit the sensed information to the sink through wireless sensor networks (WSNs). They have limited power, computational capacities and memory. Portable wireless devices are increasing in popularity. Mechanisms that allow information to be efficiently obtained through mobile WSNs are of significant interest. However, a mobile sink introduces many challenges to data dissemination in large WSNs. For example, it is important to efficiently identify the locations of mobile sinks and disseminate information from multi-source nodes to the multi-mobile sinks. In particular, a stationary dissemination path may no longer be effective in mobile sink applications, due to sink mobility. In this paper, we propose a Sink-oriented Dynamic Location Service (SDLS) approach to handle sink mobility. In SDLS, we propose an Eight-Direction Anchor (EDA) system that acts as a location service server. EDA prevents intensive energy consumption at the border sensor nodes and thus provides energy balancing to all the sensor nodes. Then we propose a Location-based Shortest Relay (LSR) that efficiently forwards (or relays) data from a source node to a sink with minimal delay path. Our results demonstrate that SDLS not only provides an efficient and scalable location service, but also reduces the average data communication overhead in scenarios with multiple and moving sinks and sources. PMID:22573964

  11. Dynamics of ecosystem services provided by subtropical ...

    EPA Pesticide Factsheets

    The trends in the provision of ecosystem services during restoration and succession of subtropical forests and plantations were quantified, in terms of both receiver and donor values, based on a case study of a 3-step secondary succession series that included a 400-year-old subtropical forest and a 23-year history of growth on 3 subtropical forest plantations in Southeastern China. The ‘People's Republic of China Forestry Standard: Forest Ecosystem Service Valuation Norms’ was revised and applied to quantify the receiver values of ecosystem services, which were then compared with the emergy-based, donor values of the services. The results revealed that the efficiencies of subtropical forests and plantations in providing ecosystem services were 2 orders of magnitude higher than similar services provided by the current China economic system, and these efficiencieskept increasing over the course of succession. As a result, we conclude that afforestation is an efficient way to accelerate both the ability and efficiency of subtropical forests to provide ecosystem services. This paper is significant because it examines the dynamics of the provision of ecosystem services by forests over a succession series that spans 400 years. The paper also examines the rate of increase of services during forest restoration over a period of 23 years. The emergy used in ecosystem services provision is compared to the provision of similar services by economic means in the Chinese e

  12. The Dynamics of Information Search Services.

    ERIC Educational Resources Information Center

    Lindquist, Mats G.

    Computer-based information search services (ISSs) of the type that provide online literature searches are analyzed from a systems viewpoint using a continuous simulation model. The methodology applied is "system dynamics," and the system language is DYNAMO. The analysis reveals that the observed growth and stagnation of a typical ISS can…

  13. Space based OTV servicing

    NASA Technical Reports Server (NTRS)

    Mcallister, J. G.

    1984-01-01

    Space based servicing of an orbit transfer vehicle (OTV) was previously outlined in sufficient detail to arrive at OTV and support system servicing requirements. Needed space station facilities and their functional requirements were identified. The impact of logistics and space serviceable design on the OTV design is detailed herein. RL10 derivative rocket engine inspection task times are enumerated.

  14. Dynamic Scaffolding in a Cloud-Based Problem Representation System: Empowering Pre-Service Teachers' Problem Solving

    ERIC Educational Resources Information Center

    Lee, Chwee Beng; Ling, Keck Voon; Reimann, Peter; Diponegoro, Yudho Ahmad; Koh, Chia Heng; Chew, Derwin

    2014-01-01

    Purpose: The purpose of this paper is to argue for the need to develop pre-service teachers' problem solving ability, in particular, in the context of real-world complex problems. Design/methodology/approach: To argue for the need to develop pre-service teachers' problem solving skills, the authors describe a web-based problem representation…

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

    PubMed Central

    Kooistra, Lammert; Bergsma, Aldo; Chuma, Beatus; de Bruin, Sytze

    2009-01-01

    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. PMID:22574019

  16. Service-based Solutions.

    ERIC Educational Resources Information Center

    Cummings, Lynda; Winston, Michael

    1998-01-01

    Describes the Solutions model used at Shelley High School in Idaho which gives students the opportunity to gain practical experience while tackling community problems. This approach is built on the three fundamentals of an integrated curriculum, a problem-solving focus, and service-based learning. Sample problems include increasing certain trout…

  17. Disaster Management Based on Urgent Computing and Dynamic Data Driven Application Services over European e-Infrastructures

    NASA Astrophysics Data System (ADS)

    Schiffers, Michael; Kranzlmüller, Dieter

    2014-05-01

    The study of natural hazards in Hydro-Meteorological Research (HMR) requires the execution of various meteorological, hydrological, and hydraulic models -- either standalone or as well-orchestrated chains (workflows) -- in order to better understand the natural phenomena leading to hazardous events. When hazards turn into disasters, exposure and vulnerability models need to be considered in addition for appropriate emergency response and recovery. While it is possible to mitigate the impact of disasters through education, policies, infrastructure resilience, and real-time decision support systems, the need to go beyond the pure communication of timely information by the advanced use of optimization and simulation technology is increasingly accepted. In general, the focus of today's decision-support systems for disaster management is on pure situational awareness (i.e., communicating to decision makers the situation in the field as accurately as possible). Experience from recent disaster cases, however, underpins the necessity of a novel, holistic approach to disaster management which not only needs to factor in the dependability of high performance computing resources and current advances in computational sciences (simulation, optimization), but also the dynamic integration of widely distributed (currently collected and archival) data into executing simulations to steer both the application model and further measurements (instrumentation and control). The first paradigm is commonly subsumed under "urgent computing (UC)", the latter one under "dynamic data driven application services (DDDAS)". Both paradigms suffer from severe research challenges. In the talk we first introduce both paradigms using several disaster cases as examples. We then deduct from these cases the inherent research questions and present a brief survey of the state-of-the-art. The main part of the talk, however, will be devoted to the presentation of a "disaster management infrastructure

  18. Pricing the Services in Dynamic Environment: Agent Pricing Model

    NASA Astrophysics Data System (ADS)

    Žagar, Drago; Rupčić, Slavko; Rimac-Drlje, Snježana

    New Internet applications and services as well as new user demands open many new issues concerning dynamic management of quality of service and price for received service, respectively. The main goals of Internet service providers are to maximize profit and maintain a negotiated quality of service. From the users' perspective the main goal is to maximize ratio of received QoS and costs of service. However, achieving these objectives could become very complex if we know that Internet service users might during the session become highly dynamic and proactive. This connotes changes in user profile or network provider/s profile caused by high level of user mobility or variable level of user demands. This paper proposes a new agent based pricing architecture for serving the highly dynamic customers in context of dynamic user/network environment. The proposed architecture comprises main aspects and basic parameters that will enable objective and transparent assessment of the costs for the service those Internet users receive while dynamically change QoS demands and cost profile.

  19. Quality of service management framework for dynamic chaining of geographic information services

    NASA Astrophysics Data System (ADS)

    Onchaga, Richard

    2006-06-01

    Dynamic chaining of geographic information services (geo-services) is gaining popularity as a new paradigm for evolving flexible geo-information systems and for providing on-demand access to geo-information. In dynamic chaining, disparate geo-services are discovered and composed at run time to yield more elaborate functionality and create value-added geo-information. Common approaches to service chaining discover and compose disparate geo-services based on the functional capability of individual geo-services. The primary concern of common approaches is thus the emergent behavior of the resulting composite geo-service. However, as geo-services become mundane and take on a greater and more strategic role in mission critical processes, deliverable quality of service (QoS) becomes an important concern. QoS concerns operational characteristics of a service that determine its utility in an application context. To address pertinent QoS requirements, a new approach to service chaining becomes necessary. In this paper we propose a QoS-aware chaining approach in which geo-services are discovered, composed and executed considering both functional and QoS requirements. We prescribe a QoS management framework that defines fundamental principles, concepts and mechanisms which can be applied to evolve an effective distributed computing platform for QoS-aware chaining of geo-services - the so-called geo-service infrastructure. The paper also defines an extensible QoS model for services delivered by dynamic compositions of geo-services. The process of orthophoto generation is used to demonstrate the applicability of the prescribed framework to service-oriented geographic information processing.

  20. Historical dynamics in ecosystem service bundles.

    PubMed

    Renard, Delphine; Rhemtulla, Jeanine M; Bennett, Elena M

    2015-10-27

    Managing multiple ecosystem services (ES), including addressing trade-offs between services and preventing ecological surprises, is among the most pressing areas for sustainability research. These challenges require ES research to go beyond the currently common approach of snapshot studies limited to one or two services at a single point in time. We used a spatiotemporal approach to examine changes in nine ES and their relationships from 1971 to 2006 across 131 municipalities in a mixed-use landscape in Quebec, Canada. We show how an approach that incorporates time and space can improve our understanding of ES dynamics. We found an increase in the provision of most services through time; however, provision of ES was not uniformly enhanced at all locations. Instead, each municipality specialized in providing a bundle (set of positively correlated ES) dominated by just a few services. The trajectory of bundle formation was related to changes in agricultural policy and global trends; local biophysical and socioeconomic characteristics explained the bundles' increasing spatial clustering. Relationships between services varied through time, with some provisioning and cultural services shifting from a trade-off or no relationship in 1971 to an apparent synergistic relationship by 2006. By implementing a spatiotemporal perspective on multiple services, we provide clear evidence of the dynamic nature of ES interactions and contribute to identifying processes and drivers behind these changing relationships. Our study raises questions about using snapshots of ES provision at a single point in time to build our understanding of ES relationships in complex and dynamic social-ecological systems.

  1. Historical dynamics in ecosystem service bundles

    PubMed Central

    Renard, Delphine; Rhemtulla, Jeanine M.; Bennett, Elena M.

    2015-01-01

    Managing multiple ecosystem services (ES), including addressing trade-offs between services and preventing ecological surprises, is among the most pressing areas for sustainability research. These challenges require ES research to go beyond the currently common approach of snapshot studies limited to one or two services at a single point in time. We used a spatiotemporal approach to examine changes in nine ES and their relationships from 1971 to 2006 across 131 municipalities in a mixed-use landscape in Quebec, Canada. We show how an approach that incorporates time and space can improve our understanding of ES dynamics. We found an increase in the provision of most services through time; however, provision of ES was not uniformly enhanced at all locations. Instead, each municipality specialized in providing a bundle (set of positively correlated ES) dominated by just a few services. The trajectory of bundle formation was related to changes in agricultural policy and global trends; local biophysical and socioeconomic characteristics explained the bundles’ increasing spatial clustering. Relationships between services varied through time, with some provisioning and cultural services shifting from a trade-off or no relationship in 1971 to an apparent synergistic relationship by 2006. By implementing a spatiotemporal perspective on multiple services, we provide clear evidence of the dynamic nature of ES interactions and contribute to identifying processes and drivers behind these changing relationships. Our study raises questions about using snapshots of ES provision at a single point in time to build our understanding of ES relationships in complex and dynamic social-ecological systems. PMID:26460005

  2. Traffic dynamics on networks with competitive services

    NASA Astrophysics Data System (ADS)

    Zhang, Yue; Huang, Ning; Li, Ruiying

    2016-12-01

    Competitive services have large effects on traffic congestion. Based on the investigation on Chinese railway network, a competitive services model is proposed to capture traffic correlations between different services. According to the value of the weight parameter 𝜃, competitive services are grouped into assortative, disassortative and neutral ones, in which their traffic loads show strongly positive, weakly positive and non-significant correlations, respectively. Simulation results illustrate that our model can effectively capture the service correlations by adjusting the weight parameter. Using this model, we analyze the influence of different types of competitive services on network congestion. Our results indicate that both capacity and efficiency of network is the lowest when it supports assortative services.

  3. Growth Dynamics of Information Search Services.

    ERIC Educational Resources Information Center

    Lindqvist, Mats

    Computer based information search services, ISS's, of the type that provide on-line literature searches are analyzed from a system's viewpoint using a continuous simulation model. The analysis shows that the observed growth and stagnation of a typical ISS can be explained as a natural consequence of market responses to the service together with a…

  4. Location-Based Services in Vehicular Networks

    ERIC Educational Resources Information Center

    Wu, Di

    2013-01-01

    Location-based services have been identified as a promising communication paradigm in highly mobile and dynamic vehicular networks. However, existing mobile ad hoc networking cannot be directly applied to vehicular networking due to differences in traffic conditions, mobility models and network topologies. On the other hand, hybrid architectures…

  5. An Executable Choreography Framework for Dynamic Service-Oriented Architectures

    NASA Technical Reports Server (NTRS)

    Akkawi, Faisal; Cottenier, Thomas; Alena, Richard L.; Fletcher, Daryl P.; Duncavage, Daniel P.; Elrad, Tzilla

    2006-01-01

    Interoperability and loose coupling requirements are pushing the next generation of distributed applications towards more decentralized and more dynamic interaction schemes, which the classic requestJresponse communication paradigm can hardly accommodate. Hence, sound foundations and mechanisms for the establishment of unmticiptitteb peer-to-peer interactions across organizational boundaries are of significant importance to upcoming middleware platforms. The Executable Choreography Framework (ECF) is a middleware-level framework that targets dynamic and decentralized service compositions. The ECF combines transparent context propagation with aspect-oriented software composition techniques to dynamically refine the default control and data flow of service invocations. The framework provides a ground for experimentation with dynamic and distributed workflows, and a base to assess their safety and applicability when depioyed across organizational boundaries.

  6. Integrating dynamic soil and vegetation properties into ecosystem service-based state and transition models to guide rangeland management

    Technology Transfer Automated Retrieval System (TEKTRAN)

    California’s annual rangelands cover approximately 6.4 million hectares, and produce 70% of the state’s forage base. This ecosystem supports more than 300 vertebrate, 5000 invertebrate, and 2000 plant species. Annual rangeland soils have the capacity to support high primary productivity, accumulate ...

  7. Ancillary-service details: Dynamic scheduling

    SciTech Connect

    Hirst, E.; Kirby, B.

    1997-01-01

    Dynamic scheduling (DS) is the electronic transfer from one control area to another of the time-varying electricity consumption associated with a load or the time-varying electricity production associated with a generator. Although electric utilities have been using this technique for at least two decades, its use is growing in popularity and importance. This growth is a consequence of the major changes under way in US bulk-power markets, in particular efforts to unbundle generation from transmission and to increase competition among generation providers. DS can promote competition and increase choices. It allows consumers to purchase certain services from entities outside their physical-host area and it allows generators to sell certain services to entities other than their physical host. These services include regulation (following minute-to-minute variations in load) and operating reserves, among others. Such an increase in the number of possible suppliers and customers should encourage innovation and reduce the costs and prices of providing electricity services. The purpose of the project reported here was to collect and analyze data on utility experiences with DS. Chapter 2 provides additional details and examples of the definitions of DS. Chapter 3 explains why DS might be an attractive service that customers and generators, as well as transmission providers, might wan to use. Chapter 4 presents some of the many current DS examples the authors uncovered in their interviews. Chapter 5 discusses the costs and cost-effectiveness of DS. Chapter 6 explains what they believe can and cannot be electronically moved from one control area to another, primarily in terms of the six ancillary services that FERC defined in Order 888. Chapter 7 discusses the need for additional research on DS.

  8. Statics and Dynamics of Selfish Interactions in Distributed Service Systems

    PubMed Central

    Altarelli, Fabrizio; Braunstein, Alfredo; Dall’Asta, Luca

    2015-01-01

    We study a class of games which models the competition among agents to access some service provided by distributed service units and which exhibits congestion and frustration phenomena when service units have limited capacity. We propose a technique, based on the cavity method of statistical physics, to characterize the full spectrum of Nash equilibria of the game. The analysis reveals a large variety of equilibria, with very different statistical properties. Natural selfish dynamics, such as best-response, usually tend to large-utility equilibria, even though those of smaller utility are exponentially more numerous. Interestingly, the latter actually can be reached by selecting the initial conditions of the best-response dynamics close to the saturation limit of the service unit capacities. We also study a more realistic stochastic variant of the game by means of a simple and effective approximation of the average over the random parameters, showing that the properties of the average-case Nash equilibria are qualitatively similar to the deterministic ones. PMID:26177449

  9. Statics and Dynamics of Selfish Interactions in Distributed Service Systems.

    PubMed

    Altarelli, Fabrizio; Braunstein, Alfredo; Dall'Asta, Luca

    2015-01-01

    We study a class of games which models the competition among agents to access some service provided by distributed service units and which exhibits congestion and frustration phenomena when service units have limited capacity. We propose a technique, based on the cavity method of statistical physics, to characterize the full spectrum of Nash equilibria of the game. The analysis reveals a large variety of equilibria, with very different statistical properties. Natural selfish dynamics, such as best-response, usually tend to large-utility equilibria, even though those of smaller utility are exponentially more numerous. Interestingly, the latter actually can be reached by selecting the initial conditions of the best-response dynamics close to the saturation limit of the service unit capacities. We also study a more realistic stochastic variant of the game by means of a simple and effective approximation of the average over the random parameters, showing that the properties of the average-case Nash equilibria are qualitatively similar to the deterministic ones.

  10. Designing Personalization in Technology-Based Services

    ERIC Educational Resources Information Center

    Lee, Min Kyung

    2013-01-01

    Personalization technology has the potential to optimize service for each person's unique needs and characteristics. One way to optimize service is to allow people to customize the service themselves; another is to proactively tailor services based on information provided by people or inferred from their past behaviors. These approaches function…

  11. An Agent-Based Model for Analyzing Control Policies and the Dynamic Service-Time Performance of a Capacity-Constrained Air Traffic Management Facility

    NASA Technical Reports Server (NTRS)

    Conway, Sheila R.

    2006-01-01

    Simple agent-based models may be useful for investigating air traffic control strategies as a precursory screening for more costly, higher fidelity simulation. Of concern is the ability of the models to capture the essence of the system and provide insight into system behavior in a timely manner and without breaking the bank. The method is put to the test with the development of a model to address situations where capacity is overburdened and potential for propagation of the resultant delay though later flights is possible via flight dependencies. The resultant model includes primitive representations of principal air traffic system attributes, namely system capacity, demand, airline schedules and strategy, and aircraft capability. It affords a venue to explore their interdependence in a time-dependent, dynamic system simulation. The scope of the research question and the carefully-chosen modeling fidelity did allow for the development of an agent-based model in short order. The model predicted non-linear behavior given certain initial conditions and system control strategies. Additionally, a combination of the model and dimensionless techniques borrowed from fluid systems was demonstrated that can predict the system s dynamic behavior across a wide range of parametric settings.

  12. Wearable Systems for Service based on Physiological Signals.

    PubMed

    Ryoo, Dong-Wan; Kim, Young-Sung; Lee, Jeun-Woo

    2005-01-01

    Many researches for useful status information on humans have been done using the bio-signals. The bio-signal acquisition systems can be used to connect a user and a ubiquitous computing environment. The ubiquitous computing environment has to give various services anywhere, anytime. Consequently, ubiquitous computing requires new technology, such as a new user interface, dynamic service mechanism based on context and mobility support, which is different from technology used in desktop environment. To do this, we developed a wearable system, which can sense physiological data, determine emotional status and execute service based on the emotion. In this paper, we described wearable systems for personalized service based on physiological signals. The wearable system is composed of three subsystems, the physiological data sensing subsystem, the human status awareness subsystem and the service management subsystem. The physiological data sensing subsystem senses PPG, GSR and SKT signals from the data glove and sends the data to a wearable system using Bluetooth. The human status awareness subsystem in the wearable system receives the data from bio-sensors and determines emotional status using nonlinear mapping and rule-base. After determining emotion, the service management subsystem activates proper service automatically, and the service management subsystem can provide personalized service for users based on acquired bio-signals. Also, we presented various feature extraction using bio-signals such as PPG, GSR, SKT considering mobility, and emotion recognition of human status for the ubiquitous computing service.

  13. Remotely sensed image processing service composition based on heuristic search

    NASA Astrophysics Data System (ADS)

    Yang, Xiaoxia; Zhu, Qing; Li, Hai-feng; Zhao, Wen-hao

    2008-12-01

    As remote sensing technology become ever more powerful with multi-platform and multi-sensor, it has been widely recognized for contributing to geospatial information efforts. Because the remotely sensed image processing demands large-scale, collaborative processing and massive storage capabilities to satisfy the increasing demands of various applications, the effect and efficiency of the remotely sensed image processing is far from the user's expectation. The emergence of Service Oriented Architecture (SOA) may make this challenge manageable. It encapsulate all processing function into services and recombine them with service chain. The service composition on demand has become a hot topic. Aiming at the success rate, quality and efficiency of processing service composition for remote sensing application, a remote sensed image processing service composition method is proposed in this paper. It composes services for a user requirement through two steps: 1) dynamically constructs a complete service dependency graph for user requirement on-line; 2) AO* based heuristic searches for optimal valid path in service dependency graph. These services within the service dependency graph are considered relevant to the specific request, instead of overall registered services. The second step, heuristic search is a promising approach for automated planning. Starting with the initial state, AO* uses a heuristic function to select states until the user requirement is reached. Experimental results show that this method has a good performance even the repository has a large number of processing services.

  14. Privacy-Preserving Location-Based Services

    ERIC Educational Resources Information Center

    Chow, Chi Yin

    2010-01-01

    Location-based services (LBS for short) providers require users' current locations to answer their location-based queries, e.g., range and nearest-neighbor queries. Revealing personal location information to potentially untrusted service providers could create privacy risks for users. To this end, our objective is to design a privacy-preserving…

  15. A Contract Language for Service-Oriented Dynamic Collaborations

    NASA Astrophysics Data System (ADS)

    Nepal, Surya; Zic, John; Chen, Shiping

    Dynamic collaborations are built using contributed resources that have come across the organizational boundaries. These resources include data, application, software, tools as well as infrastructures, and are typically subject to a rich set of access policies. The automated instantiation of a collaboration using such resources including their interoperability is a difficult problem. Existing systems are either built for specific resources, or use manual and ad-hoc approaches. This problem has attracted the Web Services community, where Web Services standards such as WSLA and WS-CDL have been proposed to address similar problems. These approaches are designed to deal with scenarios involving two parties: a service provider and a service consumer. They do not scale well to multiparty nature of dynamic collaborations. This paper proposes a contract language for dynamic multiparty collaborations that captures the contributed resources and negotiated agreements on them, as well as the mechanisms for instantiation and termination of the collaboration. The language itself has been defined using XML Schema and has been implemented in a dynamic collaboration platform to provide a connectivity service.

  16. Dynamic composition of medical support services in the ICU: Platform and algorithm design details.

    PubMed

    Hristoskova, Anna; Moeyersoon, Dieter; Van Hoecke, Sofie; Verstichel, Stijn; Decruyenaere, Johan; De Turck, Filip

    2010-12-01

    The Intensive Care Unit (ICU) is an extremely data-intensive environment where each patient needs to be monitored 24/7. Bedside monitors continuously register vital patient values (such as serum creatinine, systolic blood pressure) which are recorded frequently in the hospital database (e.g. every 2 min in the ICU of the Ghent University Hospital), laboratories generate hundreds of results of blood and urine samples, and nurses measure blood pressure and temperature up to 4 times an hour. The processing of such large amount of data requires an automated system to support the physicians' daily work. The Intensive Care Service Platform (ICSP) offers the needed support through the development of medical support services for processing and monitoring patients' data. With an increased deployment of these medical support services, reusing existing services as building blocks to create new services offers flexibility to the developer and accelerates the design process. This paper presents a new addition to the ICSP, the Dynamic Composer for Web services. Based on a semantic description of the medical support services, this Composer enables a service to be executed by creating a composition of medical services that provide the needed calculations. The composition is achieved using various algorithms satisfying certain quality of service (QoS) constraints and requirements. In addition to the automatic composition the paper also proposes a recovery mechanism in case of unavailable services. When executing the composition of medical services, unavailable services are dynamically replaced by equivalent services or a new composition achieving the same result. The presented platform and QoS algorithms are put through extensive performance and scalability tests for typical ICU scenarios, in which basic medical services are composed to a complex patient monitoring service.

  17. The Dynamics and Correlates of Religious Service Attendance in Adolescence

    ERIC Educational Resources Information Center

    Hardie, Jessica Halliday; Pearce, Lisa D.; Denton, Melinda Lundquist

    2016-01-01

    This study examines changes in religious service attendance over time for a contemporary cohort of adolescents moving from middle to late adolescence. We use two waves of a nationally representative panel survey of youth from the National Study of Youth and Religion (NSYR) to examine the dynamics of religious involvement during adolescence. We…

  18. Dynamic User Interfaces for Service Oriented Architectures in Healthcare.

    PubMed

    Schweitzer, Marco; Hoerbst, Alexander

    2016-01-01

    Electronic Health Records (EHRs) play a crucial role in healthcare today. Considering a data-centric view, EHRs are very advanced as they provide and share healthcare data in a cross-institutional and patient-centered way adhering to high syntactic and semantic interoperability. However, the EHR functionalities available for the end users are rare and hence often limited to basic document query functions. Future EHR use necessitates the ability to let the users define their needed data according to a certain situation and how this data should be processed. Workflow and semantic modelling approaches as well as Web services provide means to fulfil such a goal. This thesis develops concepts for dynamic interfaces between EHR end users and a service oriented eHealth infrastructure, which allow the users to design their flexible EHR needs, modeled in a dynamic and formal way. These are used to discover, compose and execute the right Semantic Web services.

  19. Space-Based Information Services

    NASA Astrophysics Data System (ADS)

    Lee, C.

    With useful data now beginning to flow from earth observation and navigation satellites, it is an active time for the development of space services - all types of satellites are now being put to work, not just Comsats. However derived products require a blend of innovative software design, low cost operational support and a real insight into the information needs of the customer. Science Systems is meeting this challenge through a series of on-going projects, three of which are summarised here (addressing navigation, communications and earth observation). By demonstrating a broad range of related disciplines; from monitoring and control to back-room billing; from data management to intelligent systems, Science Systems hopes to play a key role in this developing market.

  20. BoD services in layer 1 VPN with dynamic virtual concatenation group

    NASA Astrophysics Data System (ADS)

    Du, Shu; Peng, Yunfeng; Long, Keping

    2008-11-01

    Bandwidth-on-Demand (BoD) services are characteristic of dynamic bandwidth provisioning based on customers' resource requirement, which will be a must for future networks. BoD services become possible with the development of make-before-break, Virtual Concatenation (VCAT) and Link Capacity Adjustment Scheme (LCAS). In this paper, we introduce BoD services into L1VPN, thus the resource assigned to a L1VPN can be gracefully adjusted at various bandwidth granularities based on customers' requirement. And we propose a dynamic bandwidth adjustment scheme, which is compromise between make-before-break and VCAT&LCAS and mainly based on the latter. The scheme minimizes the number of distinct paths to support a connection between a source-destination pair, and uses make-beforebreak technology for re-optimization.

  1. Performance-Based Services Acquisition

    DTIC Science & Technology

    2011-02-01

    Nonetheless, it is clear that contracting will continue to play an important role in the DoD even after the U.S. military presence is reduced in Iraq and...13 R.C., Jr. 2006). PBSA became the latest term for outcomes-based contracting after the issuance of the Office of Federal Procurement Policy’s...demand through two phenomena known as the whiplash effect and supply push. Currently, the system has high and rising maintenance costs, long

  2. The Dynamics and Correlates of Religious Service Attendance in Adolescence.

    PubMed

    Hardie, Jessica Halliday; Pearce, Lisa D; Denton, Melinda Lundquist

    2016-03-01

    This study examines changes in religious service attendance over time for a contemporary cohort of adolescents moving from middle to late adolescence. We use two waves of a nationally representative panel survey of youth from the National Study of Youth and Religion (NSYR) to examine the dynamics of religious involvement during adolescence. We then follow with an analysis of how demographic characteristics, family background, and life course transitions relate to changes in religious service attendance during adolescence. Our findings suggest that, on average, adolescent religious service attendance declines over time, related to major life course transitions such as becoming employed, leaving home, and initiating sexual activity. Parents' affiliation and attendance, on the other hand, are protective factors against decreasing attendance.

  3. Spatial dynamics of ecosystem service flows: a comprehensive approach to quantifying actual services

    USGS Publications Warehouse

    Bagstad, Kenneth J.; Johnson, Gary W.; Voigt, Brian; Villa, Ferdinando

    2013-01-01

    Recent ecosystem services research has highlighted the importance of spatial connectivity between ecosystems and their beneficiaries. Despite this need, a systematic approach to ecosystem service flow quantification has not yet emerged. In this article, we present such an approach, which we formalize as a class of agent-based models termed “Service Path Attribution Networks” (SPANs). These models, developed as part of the Artificial Intelligence for Ecosystem Services (ARIES) project, expand on ecosystem services classification terminology introduced by other authors. Conceptual elements needed to support flow modeling include a service's rivalness, its flow routing type (e.g., through hydrologic or transportation networks, lines of sight, or other approaches), and whether the benefit is supplied by an ecosystem's provision of a beneficial flow to people or by absorption of a detrimental flow before it reaches them. We describe our implementation of the SPAN framework for five ecosystem services and discuss how to generalize the approach to additional services. SPAN model outputs include maps of ecosystem service provision, use, depletion, and flows under theoretical, possible, actual, inaccessible, and blocked conditions. We highlight how these different ecosystem service flow maps could be used to support various types of decision making for conservation and resource management planning.

  4. School-based Services. Chapter 4.

    ERIC Educational Resources Information Center

    1996

    This collection of papers presented at a 1996 conference on children's mental health focuses on school-based services. The eight papers have the following titles and authors: (1) "Facilitating the Social/Emotional Development of Middle School Students: A Model for Improving School-Based Curriculum" (Craig Barringer and Doug Cheney); (2)…

  5. Model Driven Development of Web Services and Dynamic Web Services Composition

    DTIC Science & Technology

    2005-01-01

    Web Services (WS) has emerged as a new component-based software develop- ment paradigm in a network -centric environment based on the Service Oriented...tion of legacy distributed software system toward WS applications ; 2) the innovation of new infrastructure, and languages in support of WS application ...approach is presented toward reengineering legacy software systems to WS applications , rather than rewriting the whole legacy software system from

  6. Cryptosystems based on chaotic dynamics

    SciTech Connect

    McNees, R.A.; Protopopescu, V.; Santoro, R.T.; Tolliver, J.S.

    1993-08-01

    An encryption scheme based on chaotic dynamics is presented. This scheme makes use of the efficient and reproducible generation of cryptographically secure pseudo random numbers from chaotic maps. The result is a system which encrypts quickly and possesses a large keyspace, even in small precision implementations. This system offers an excellent solution to several problems including the dissemination of key material, over the air rekeying, and other situations requiring the secure management of information.

  7. Organizational Readiness for Stage-Based Dynamics of Innovation Implementation

    ERIC Educational Resources Information Center

    Simpson, D. Dwayne

    2009-01-01

    Implementing innovations in social and health-related service programs is a dynamic stage-based process. This article discusses training, adoption, implementation, and practice as sequential elements of a conceptual framework for effective preparation and implementation of evidence-based innovations. However, systems need to be prepared for change…

  8. [Dynamic changes of ecosystem service value in Pinggu District of Beijing].

    PubMed

    Li, Bo; Song, Xiao-Yuan; Xie, Hua-Lin; Hao, Li-Xia; Zhang, Shu-Hui

    2008-10-01

    Based on the land use/cover data of 1995 and 2004, and by using ecosystem service value per unit area of different terrestrial ecosystem types in China, the dynamic changes of ecosystem service value in Pinggu District of Beijing were analyzed. The results showed that the total ecosystem service value of Pinggu District was decreased from 3.291 x 10(9) yuan in 1995 to 3.044 x 10(9) yuan in 2004, with a change rate of -7.50%. The decrease in the areas of farmland and waters was the primary cause of the loss in ecosystem service function. Aquatic ecosystem had the highest ecological service value per unit area, while forest ecosystem gave the greatest contribution to the total ecosystem service value. The dynamic changes of the ecological service value revealed the conspicuously irrationality of land use structure in the District. The area proportions of forestland, farmland, and waters should be increased, and the conversion from farmland to constructive land should be controlled strictly. As the emergency water source and eco-conservation division of Beijing City, Pinggu District should improve its eco-environment protection and economic development to support the ecological and drinking water source securities of the Capital Beijing.

  9. Dynamic RACH Partition for Massive Access of Differentiated M2M Services

    PubMed Central

    Du, Qinghe; Li, Wanyu; Liu, Lingjia; Ren, Pinyi; Wang, Yichen; Sun, Li

    2016-01-01

    In machine-to-machine (M2M) networks, a key challenge is to overcome the overload problem caused by random access requests from massive machine-type communication (MTC) devices. When differentiated services coexist, such as delay-sensitive and delay-tolerant services, the problem becomes more complicated and challenging. This is because delay-sensitive services often use more aggressive policies, and thus, delay-tolerant services get much fewer chances to access the network. To conquer the problem, we propose an efficient mechanism for massive access control over differentiated M2M services, including delay-sensitive and delay-tolerant services. Specifically, based on the traffic loads of the two types of services, the proposed scheme dynamically partitions and allocates the random access channel (RACH) resource to each type of services. The RACH partition strategy is thoroughly optimized to increase the access performances of M2M networks. Analyses and simulation demonstrate the effectiveness of our design. The proposed scheme can outperform the baseline access class barring (ACB) scheme, which ignores service types in access control, in terms of access success probability and the average access delay. PMID:27043568

  10. Dynamic RACH Partition for Massive Access of Differentiated M2M Services.

    PubMed

    Du, Qinghe; Li, Wanyu; Liu, Lingjia; Ren, Pinyi; Wang, Yichen; Sun, Li

    2016-03-30

    In machine-to-machine (M2M) networks, a key challenge is to overcome the overload problem caused by random access requests from massive machine-type communication (MTC) devices. When differentiated services coexist, such as delay-sensitive and delay-tolerant services, the problem becomes more complicated and challenging. This is because delay-sensitive services often use more aggressive policies, and thus, delay-tolerant services get much fewer chances to access the network. To conquer the problem, we propose an efficient mechanism for massive access control over differentiated M2M services, including delay-sensitive and delay-tolerant services. Specifically, based on the traffic loads of the two types of services, the proposed scheme dynamically partitions and allocates the random access channel (RACH) resource to each type of services. The RACH partition strategy is thoroughly optimized to increase the access performances of M2M networks. Analyses and simulation demonstrate the effectiveness of our design. The proposed scheme can outperform the baseline access class barring (ACB) scheme, which ignores service types in access control, in terms of access success probability and the average access delay.

  11. Dynamic Hop Service Differentiation Model for End-to-End QoS Provisioning in Multi-Hop Wireless Networks

    NASA Astrophysics Data System (ADS)

    Youn, Joo-Sang; Seok, Seung-Joon; Kang, Chul-Hee

    This paper presents a new QoS model for end-to-end service provisioning in multi-hop wireless networks. In legacy IEEE 802.11e based multi-hop wireless networks, the fixed assignment of service classes according to flow's priority at every node causes priority inversion problem when performing end-to-end service differentiation. Thus, this paper proposes a new QoS provisioning model called Dynamic Hop Service Differentiation (DHSD) to alleviate the problem and support effective service differentiation between end-to-end nodes. Many previous works for QoS model through the 802.11e based service differentiation focus on packet scheduling on several service queues with different service rate and service priority. Our model, however, concentrates on a dynamic class selection scheme, called Per Hop Class Assignment (PHCA), in the node's MAC layer, which selects a proper service class for each packet, in accordance with queue states and service requirement, in every node along the end-to-end route of the packet. The proposed QoS solution is evaluated using the OPNET simulator. The simulation results show that the proposed model outperforms both best-effort and 802.11e based strict priority service models in mobile ad hoc environments.

  12. Nonlinear dynamics based digital logic and circuits.

    PubMed

    Kia, Behnam; Lindner, John F; Ditto, William L

    2015-01-01

    We discuss the role and importance of dynamics in the brain and biological neural networks and argue that dynamics is one of the main missing elements in conventional Boolean logic and circuits. We summarize a simple dynamics based computing method, and categorize different techniques that we have introduced to realize logic, functionality, and programmability. We discuss the role and importance of coupled dynamics in networks of biological excitable cells, and then review our simple coupled dynamics based method for computing. In this paper, for the first time, we show how dynamics can be used and programmed to implement computation in any given base, including but not limited to base two.

  13. Nonlinear dynamics based digital logic and circuits

    PubMed Central

    Kia, Behnam; Lindner, John. F.; Ditto, William L.

    2015-01-01

    We discuss the role and importance of dynamics in the brain and biological neural networks and argue that dynamics is one of the main missing elements in conventional Boolean logic and circuits. We summarize a simple dynamics based computing method, and categorize different techniques that we have introduced to realize logic, functionality, and programmability. We discuss the role and importance of coupled dynamics in networks of biological excitable cells, and then review our simple coupled dynamics based method for computing. In this paper, for the first time, we show how dynamics can be used and programmed to implement computation in any given base, including but not limited to base two. PMID:26029096

  14. Agent-based user-adaptive service provision in ubiquitous systems

    NASA Astrophysics Data System (ADS)

    Saddiki, H.; Harroud, H.; Karmouch, A.

    2012-11-01

    With the increasing availability of smartphones, tablets and other computing devices, technology consumers have grown accustomed to performing all of their computing tasks anytime, anywhere and on any device. There is a greater need to support ubiquitous connectivity and accommodate users by providing software as network-accessible services. In this paper, we propose a MAS-based approach to adaptive service composition and provision that automates the selection and execution of a suitable composition plan for a given service. With agents capable of autonomous and intelligent behavior, the composition plan is selected in a dynamic negotiation driven by a utility-based decision-making mechanism; and the composite service is built by a coalition of agents each providing a component necessary to the target service. The same service can be built in variations for catering to dynamic user contexts and further personalizing the user experience. Also multiple services can be grouped to satisfy new user needs.

  15. Semantics-based composition of EMBOSS services

    PubMed Central

    2011-01-01

    Background More than in other domains the heterogeneous services world in bioinformatics demands for a methodology to classify and relate resources in a both human and machine accessible manner. The Semantic Web, which is meant to address exactly this challenge, is currently one of the most ambitious projects in computer science. Collective efforts within the community have already led to a basis of standards for semantic service descriptions and meta-information. In combination with process synthesis and planning methods, such knowledge about types and services can facilitate the automatic composition of workflows for particular research questions. Results In this study we apply the synthesis methodology that is available in the Bio-jETI workflow management framework for the semantics-based composition of EMBOSS services. EMBOSS (European Molecular Biology Open Software Suite) is a collection of 350 tools (March 2010) for various sequence analysis tasks, and thus a rich source of services and types that imply comprehensive domain models for planning and synthesis approaches. We use and compare two different setups of our EMBOSS synthesis domain: 1) a manually defined domain setup where an intuitive, high-level, semantically meaningful nomenclature is applied to describe the input/output behavior of the single EMBOSS tools and their classifications, and 2) a domain setup where this information has been automatically derived from the EMBOSS Ajax Command Definition (ACD) files and the EMBRACE Data and Methods ontology (EDAM). Our experiments demonstrate that these domain models in combination with our synthesis methodology greatly simplify working with the large, heterogeneous, and hence manually intractable EMBOSS collection. However, they also show that with the information that can be derived from the (current) ACD files and EDAM ontology alone, some essential connections between services can not be recognized. Conclusions Our results show that adequate domain

  16. Rule-based semantic web services matching strategy

    NASA Astrophysics Data System (ADS)

    Fan, Hong; Wang, Zhihua

    2011-12-01

    With the development of Web services technology, the number of service increases rapidly, and it becomes a challenge task that how to efficiently discovery the services that exactly match the user's requirements from the large scale of services library. Many semantic Web services discovery technologies proposed by the recent literatures only focus on the keyword-based or primary semantic based service's matching. This paper studies the rules and rule reasoning based service matching algorithm in the background of large scale services library. Firstly, the formal descriptions of semantic web services and service matching is presented. The services' matching are divided into four levels: Exact, Plugin, Subsume and Fail and their formal descriptions are also presented. Then, the service matching is regarded as rule-based reasoning issues. A set of match rules are firstly given and the related services set is retrieved from services ontology base through rule-based reasoning, and their matching levels are determined by distinguishing the relationships between service's I/O and user's request I/O. Finally, the experiment based on two services sets show that the proposed services matching strategy can easily implement the smart service discovery and obtains the high service discovery efficiency in comparison with the traditional global traversal strategy.

  17. Optimizing medical data quality based on multiagent web service framework.

    PubMed

    Wu, Ching-Seh; Khoury, Ibrahim; Shah, Hemant

    2012-07-01

    One of the most important issues in e-healthcare information systems is to optimize the medical data quality extracted from distributed and heterogeneous environments, which can extremely improve diagnostic and treatment decision making. This paper proposes a multiagent web service framework based on service-oriented architecture for the optimization of medical data quality in the e-healthcare information system. Based on the design of the multiagent web service framework, an evolutionary algorithm (EA) for the dynamic optimization of the medical data quality is proposed. The framework consists of two main components; first, an EA will be used to dynamically optimize the composition of medical processes into optimal task sequence according to specific quality attributes. Second, a multiagent framework will be proposed to discover, monitor, and report any inconstancy between the optimized task sequence and the actual medical records. To demonstrate the proposed framework, experimental results for a breast cancer case study are provided. Furthermore, to show the unique performance of our algorithm, a comparison with other works in the literature review will be presented.

  18. Safe and Secure Services Based on NGN

    NASA Astrophysics Data System (ADS)

    Fukazawa, Tomoo; Nisase, Takemi; Kawashima, Masahisa; Hariu, Takeo; Oshima, Yoshihito

    Next Generation Network (NGN), which has been undergoing standardization as it has developed, is expected to create new services that converge the fixed and mobile networks. This paper introduces the basic requirements for NGN in terms of security and explains the standardization activities, in particular, the requirements for the security function described in Y.2701 discussed in ITU-T SG-13. In addition to the basic NGN security function, requirements for NGN authentication are also described from three aspects: security, deployability, and service. As examples of authentication implementation, three profiles-namely, fixed, nomadic, and mobile-are defined in this paper. That is, the “fixed profile” is typically for fixed-line subscribers, the “nomadic profile” basically utilizes WiFi access points, and the “mobile profile” provides ideal NGN mobility for mobile subscribers. All three of these profiles satisfy the requirements from security aspects. The three profiles are compared from the viewpoint of requirements for deployability and service. After showing that none of the three profiles can fulfill all of the requirements, we propose that multiple profiles should be used by NGN providers. As service and application examples, two promising NGN applications are proposed. The first is a strong authentication mechanism that makes Web applications more safe and secure even against password theft. It is based on NGN ID federation function. The second provides an easy peer-to-peer broadband virtual private network service aimed at safe and secure communication for personal/SOHO (small office, home office) users, based on NGN SIP (session initiation protocol) session control.

  19. The proposed planning method as a parallel element to a real service system for dynamic sharing of service lines.

    PubMed

    Klampfer, Saša; Chowdhury, Amor

    2015-07-01

    This paper presents a solution to the bottleneck problem with dynamic sharing or leasing of service capacities. From this perspective the use of the proposed method as a parallel element in service capacities sharing is very important, because it enables minimization of the number of interfaces, and consequently of the number of leased lines, with a combination of two service systems with time-opposite peak loads. In this paper we present a new approach, methodology, models and algorithms which solve the problems of dynamic leasing and sharing of service capacities.

  20. Competency-Based Curriculum for Prevocational Exploration. Personal Service.

    ERIC Educational Resources Information Center

    Marshall Univ., Huntington, WV. Dept. of Occupational, Adult, and Safety Education.

    This competency-based curriculum was designed to aid teachers in West Virginia to provide students with information about careers in the personal services occupational cluster. The curriculum guide contains 43 lessons, organized into the four areas of attendant services, barber and beauty services, commercial services, and residential services,…

  1. An Automatic Web Service Composition Framework Using QoS-Based Web Service Ranking Algorithm.

    PubMed

    Mallayya, Deivamani; Ramachandran, Baskaran; Viswanathan, Suganya

    2015-01-01

    Web service has become the technology of choice for service oriented computing to meet the interoperability demands in web applications. In the Internet era, the exponential addition of web services nominates the "quality of service" as essential parameter in discriminating the web services. In this paper, a user preference based web service ranking (UPWSR) algorithm is proposed to rank web services based on user preferences and QoS aspect of the web service. When the user's request cannot be fulfilled by a single atomic service, several existing services should be composed and delivered as a composition. The proposed framework allows the user to specify the local and global constraints for composite web services which improves flexibility. UPWSR algorithm identifies best fit services for each task in the user request and, by choosing the number of candidate services for each task, reduces the time to generate the composition plans. To tackle the problem of web service composition, QoS aware automatic web service composition (QAWSC) algorithm proposed in this paper is based on the QoS aspects of the web services and user preferences. The proposed framework allows user to provide feedback about the composite service which improves the reputation of the services.

  2. The New York City Neighborhood-Based Services Strategy

    ERIC Educational Resources Information Center

    Chahine, Zeinab; van Straaten, Justine; Williams-Isom, Anne

    2005-01-01

    The New York City Administration for Children's Services (ACS) instituted a neighborhood-based services system through the realignment of all foster care, preventive, and protective services along community district lines. ACS, with its community partners, also formed neighborhood-based networks to improve service coordination and collaboration…

  3. Similarity Based Semantic Web Service Match

    NASA Astrophysics Data System (ADS)

    Peng, Hui; Niu, Wenjia; Huang, Ronghuai

    Semantic web service discovery aims at returning the most matching advertised services to the service requester by comparing the semantic of the request service with an advertised service. The semantic of a web service are described in terms of inputs, outputs, preconditions and results in Ontology Web Language for Service (OWL-S) which formalized by W3C. In this paper we proposed an algorithm to calculate the semantic similarity of two services by weighted averaging their inputs and outputs similarities. Case study and applications show the effectiveness of our algorithm in service match.

  4. NASA Cloud-Based Climate Data Services

    NASA Astrophysics Data System (ADS)

    McInerney, M. A.; Schnase, J. L.; Duffy, D. Q.; Tamkin, G. S.; Strong, S.; Ripley, W. D., III; Thompson, J. H.; Gill, R.; Jasen, J. E.; Samowich, B.; Pobre, Z.; Salmon, E. M.; Rumney, G.; Schardt, T. D.

    2012-12-01

    Cloud-based scientific data services are becoming an important part of NASA's mission. Our technological response is built around the concept of specialized virtual climate data servers, repetitive cloud provisioning, image-based deployment and distribution, and virtualization-as-a-service (VaaS). A virtual climate data server (vCDS) is an Open Archive Information System (OAIS) compliant, iRODS-based data server designed to support a particular type of scientific data collection. iRODS is data grid middleware that provides policy-based control over collection-building, managing, querying, accessing, and preserving large scientific data sets. We have deployed vCDS Version 1.0 in the Amazon EC2 cloud using S3 object storage and are using the system to deliver a subset of NASA's Intergovernmental Panel on Climate Change (IPCC) data products to the latest CentOS federated version of Earth System Grid Federation (ESGF), which is also running in the Amazon cloud. vCDS-managed objects are exposed to ESGF through FUSE (Filesystem in User Space), which presents a POSIX-compliant filesystem abstraction to applications such as the ESGF server that require such an interface. A vCDS manages data as a distinguished collection for a person, project, lab, or other logical unit. A vCDS can manage a collection across multiple storage resources using rules and microservices to enforce collection policies. And a vCDS can federate with other vCDSs to manage multiple collections over multiple resources, thereby creating what can be thought of as an ecosystem of managed collections. With the vCDS approach, we are trying to enable the full information lifecycle management of scientific data collections and make tractable the task of providing diverse climate data services. In this presentation, we describe our approach, experiences, lessons learned, and plans for the future.; (A) vCDS/ESG system stack. (B) Conceptual architecture for NASA cloud-based data services.

  5. An Automatic Web Service Composition Framework Using QoS-Based Web Service Ranking Algorithm

    PubMed Central

    Mallayya, Deivamani; Ramachandran, Baskaran; Viswanathan, Suganya

    2015-01-01

    Web service has become the technology of choice for service oriented computing to meet the interoperability demands in web applications. In the Internet era, the exponential addition of web services nominates the “quality of service” as essential parameter in discriminating the web services. In this paper, a user preference based web service ranking (UPWSR) algorithm is proposed to rank web services based on user preferences and QoS aspect of the web service. When the user's request cannot be fulfilled by a single atomic service, several existing services should be composed and delivered as a composition. The proposed framework allows the user to specify the local and global constraints for composite web services which improves flexibility. UPWSR algorithm identifies best fit services for each task in the user request and, by choosing the number of candidate services for each task, reduces the time to generate the composition plans. To tackle the problem of web service composition, QoS aware automatic web service composition (QAWSC) algorithm proposed in this paper is based on the QoS aspects of the web services and user preferences. The proposed framework allows user to provide feedback about the composite service which improves the reputation of the services. PMID:26504894

  6. Agent-Based Framework for Personalized Service Provisioning in Converged IP Networks

    NASA Astrophysics Data System (ADS)

    Podobnik, Vedran; Matijasevic, Maja; Lovrek, Ignac; Skorin-Kapov, Lea; Desic, Sasa

    In a global multi-service and multi-provider market, the Internet Service Providers will increasingly need to differentiate in the service quality they offer and base their operation on new, consumer-centric business models. In this paper, we propose an agent-based framework for the Business-to-Consumer (B2C) electronic market, comprising the Consumer Agents, Broker Agents and Content Agents, which enable Internet consumers to select a content provider in an automated manner. We also discuss how to dynamically allocate network resources to provide end-to-end Quality of Service (QoS) for a given consumer and content provider.

  7. Reliability-based pricing of electricity service

    SciTech Connect

    Hagazy, Y.A.

    1993-01-01

    This research has two objectives: (a) to develop a price structure that unbundles electricity service by reliability levels, and (b) to analyze the implications of such a structure on economic welfare, system operation, load management, and energy conservation. The authors developed a pricing mechanism for electricity service that combines priority (reliability differentiation) pricing with real-time Ramsey type pricing. The electric utility is assumed to be a single welfare-maximizing firm able to set and communicate prices instantly. At time of supply shortages, the utility has direct control over customer loads and follows a rationing method among customers willing to accept power interruptions. Therefore, customers are given the choice either to be served with a high reliability [open quotes]firm[close quotes] service, or to be subject to interruption. To encourage customers to make rational reliability choices, a payment/compensation mechanism was integrated into the welfare-maximization model. In order to account for uncertainties associated with the operation of electric power systems, a stochastic production cost simulation is also integrated with the model. The stochastic production cost simulation yields the estimation of the expected production, cost, marginal costs, and system reliability level at total demand. The authors examine the welfare gain and energy and reserve saving possibilities due to different pricing schemes. The results show that reliability-based pricing yields higher economic efficiency and energy and power saving than both spot and Ramsey pricing when system imperfect reliability is considered. Therefore, the implication of this research is that reliability-based pricing provides a feasible solution to electric utilities as a substitute for power purchases, and/or new capacity investment.

  8. Distance-based classification of keystroke dynamics

    NASA Astrophysics Data System (ADS)

    Tran Nguyen, Ngoc

    2016-07-01

    This paper uses the keystroke dynamics in user authentication. The relationship between the distance metrics and the data template, for the first time, was analyzed and new distance based algorithm for keystroke dynamics classification was proposed. The results of the experiments on the CMU keystroke dynamics benchmark dataset1 were evaluated with an equal error rate of 0.0614. The classifiers using the proposed distance metric outperform existing top performing keystroke dynamics classifiers which use traditional distance metrics.

  9. Community-Based Occupational Therapy Services for Children: A Quebec Survey on Service Delivery

    ERIC Educational Resources Information Center

    Cotellesso, Annie; Mazer, Barbara; Majnemer, Annette

    2009-01-01

    Community-based occupational therapy (OT) services are intended to promote social integration and minimize disability. The objective of this study was to describe community-based OT services for children in the province of Quebec, Canada. Specific aims included (a) to determine the proportion of Centres Locaux de Services Communautaires (CLSCs)…

  10. Psychosocial Dynamics of College Students' Use of Mental Health Services

    ERIC Educational Resources Information Center

    Rosenthal, Beth Spenciner; Wilson, William Cody

    2016-01-01

    The authors present and empirically test a multivariate model of the use of mental health counseling services. Use of such services by 1st-year college students is directly a result of need for these services and willingness to use them. Beliefs about mental health services and demographic characteristics are not directly related to use, but…

  11. A Multidisciplinary Osteoporosis Service-Based Action Research Study

    ERIC Educational Resources Information Center

    Whitehead, Dean; Keast, John; Montgomery, Val; Hayman, Sue

    2004-01-01

    Objective: To investigate an existing Trust-based osteoporosis service's preventative activity, determine any issues and problems and use this data to reorganise the service, as part of a National Health Service Executive/Regional Office-commissioned and funded study. Setting: A UK Hospital Trust's Osteoporosis Service. Design & Method: A…

  12. A QoS-Aware Service Selection Approach on P2P Network for Dynamic Cross-Organizational Workflow Development

    NASA Astrophysics Data System (ADS)

    Zhou, Jielong; Dou, Wanchun

    A workflow system is often composed of a number of subtasks in its pattern. In services computing environment, a dynamic cross-organizational workflow can be implemented by assigning services to its subtasks. It is often enabled by a service discovery process on Internet. Traditional service discovery approaches are centralized, and suffer from many problems such as one-point failure and weak scalability. Thus, decentralized P2P technique is a promising approach for service publishing and discovery. It is quite probable that there are more than one candidates which have exactly the same function after a service discovery process. It is often a challenging effort to select a qualified service from a group of candidates, especially on P2P networks. In view of this challenge, a QoS-aware service selection approach on unstructured P2P networks is presented in this paper. It aims at discovering and selecting services on two-layered unstructured P2P networks according to QoS parameters of services and preference of service requesters. This approach is applied to a case study based on a simplified P2P network with some virtual services.

  13. Providing IoT Services in Smart Cities through Dynamic Augmented Reality Markers.

    PubMed

    Chaves-Diéguez, David; Pellitero-Rivero, Alexandre; García-Coego, Daniel; González-Castaño, Francisco Javier; Rodríguez-Hernández, Pedro Salvador; Piñeiro-Gómez, Óscar; Gil-Castiñeira, Felipe; Costa-Montenegro, Enrique

    2015-07-03

    Smart cities are expected to improve the quality of life of citizens by relying on new paradigms, such as the Internet of Things (IoT) and its capacity to manage and interconnect thousands of sensors and actuators scattered across the city. At the same time, mobile devices widely assist professional and personal everyday activities. A very good example of the potential of these devices for smart cities is their powerful support for intuitive service interfaces (such as those based on augmented reality (AR)) for non-expert users. In our work, we consider a scenario that combines IoT and AR within a smart city maintenance service to improve the accessibility of sensor and actuator devices in the field, where responsiveness is crucial. In it, depending on the location and needs of each service, data and commands will be transported by an urban communications network or consulted on the spot. Direct AR interaction with urban objects has already been described; it usually relies on 2D visual codes to deliver object identifiers (IDs) to the rendering device to identify object resources. These IDs allow information about the objects to be retrieved from a remote server. In this work, we present a novel solution that replaces static AR markers with dynamic markers based on LED communication, which can be decoded through cameras embedded in smartphones. These dynamic markers can directly deliver sensor information to the rendering device, on top of the object ID, without further network interaction.

  14. Providing IoT Services in Smart Cities through Dynamic Augmented Reality Markers

    PubMed Central

    Chaves-Diéguez, David; Pellitero-Rivero, Alexandre; García-Coego, Daniel; González-Castaño, Francisco Javier; Rodríguez-Hernández, Pedro Salvador; Piñeiro-Gómez, Óscar; Gil-Castiñeira, Felipe; Costa-Montenegro, Enrique

    2015-01-01

    Smart cities are expected to improve the quality of life of citizens by relying on new paradigms, such as the Internet of Things (IoT) and its capacity to manage and interconnect thousands of sensors and actuators scattered across the city. At the same time, mobile devices widely assist professional and personal everyday activities. A very good example of the potential of these devices for smart cities is their powerful support for intuitive service interfaces (such as those based on augmented reality (AR)) for non-expert users. In our work, we consider a scenario that combines IoT and AR within a smart city maintenance service to improve the accessibility of sensor and actuator devices in the field, where responsiveness is crucial. In it, depending on the location and needs of each service, data and commands will be transported by an urban communications network or consulted on the spot. Direct AR interaction with urban objects has already been described; it usually relies on 2D visual codes to deliver object identifiers (IDs) to the rendering device to identify object resources. These IDs allow information about the objects to be retrieved from a remote server. In this work, we present a novel solution that replaces static AR markers with dynamic markers based on LED communication, which can be decoded through cameras embedded in smartphones. These dynamic markers can directly deliver sensor information to the rendering device, on top of the object ID, without further network interaction. PMID:26151215

  15. Service Knowledge Spaces for Semantic Collaboration in Web-based Systems

    NASA Astrophysics Data System (ADS)

    Bianchini, Devis; de Antonellis, Valeria; Melchiori, Michele

    Semantic Web technologies have been applied to enable collaboration in open distributed systems, where interoperability issues raise due to the absence of a global view of the shared resources. Adoption of service-oriented technologies has improved interoperability at the application level by exporting systems functionalities as Web services. In fact, Service Oriented Architecture (SOA) constitutes an appropriate platform-independent approach to implement collaboration activities by means of automatic service discovery and composition. Recently, service discovery has been applied to collaborative environments such as the P2P one, where independent partners need cooperate through resource sharing without a stable network configuration and adopting different semantic models. Model-based techniques relying on Semantic Web need be defined to generate semantic service descriptions, allowing collaborative partners to export their functionalities in a semantic way. Semantic-based service matchmaking techniques are in charge of effectively and efficiently evaluating similarity between service requests and service offers in a huge, dynamic distributed environment. The result is an evolving service knowledge space where collaborative partners that provide similar services are semantically related and constitute synergic service centres in a given domain. Specific modeling requirements related to Semantic Web, service-oriented and P2P technologies must be considered.

  16. Pre Service Teachers' Usage of Dynamic Mathematics Software

    ERIC Educational Resources Information Center

    Bulut, Mehmet; Bulut, Neslihan

    2011-01-01

    Aim of this study is about mathematics education and dynamic mathematics software. Dynamic mathematics software provides new opportunities for using both computer algebra system and dynamic geometry software. GeoGebra selected as dynamic mathematics software in this research. In this study, it is investigated that what is the usage of pre service…

  17. The Motivational Bases of Public Service.

    ERIC Educational Resources Information Center

    Perry, James L.; Wise, Lois Recascino

    1990-01-01

    Suggests that, although a crisis in government service is widely recognized, understanding the motives of public servants and the way to stimulate public service motivation are at a preliminary stage. (Author)

  18. [Quality of community-based healthcare services].

    PubMed

    Wilf-Miron, Rachel; Shemer, Joshua

    2004-03-01

    The recent concern regarding the quality of healthcare services is partly due to the empowerment of health consumers, cost containment measures that may compromise quality, increased complexity of the medical practice and the accelerated growth of data on the magnitude and extent of quality problems. The framework of the delivery of health services, including quality parameters, differs fundamentally in the community as opposed to the hospital setting. In the community, the episode of care lacks geographic and temporal boundaries, and is divided among different facilities and caregivers. Hence, the healthcare systems lack control over the management of care. In the solo practice, the physician lacks the opportunity to discuss and share medical decisions with his/her peers and physician's reimbursement does not encourage him/her to invest time and effort in the provision of quality care. Furthermore, in the community setting, the patient is expected to take responsibility for compliance to the therapeutic regimen, a condition that may frequently interfere with regular life routines. Therefore, quality promotion should embody the "quality triangle" encompassing patients, caregivers, the healthcare system and appropriate interfaces. Ideally, the voice of the health consumer should be an integral consideration in the design of health policy, care should be patient-centered and physician reimbursement should reflect the quality of care provided. In addition, the design of the healthcare system information technology in supporting decision-making and training "quality leaders" to facilitate quality improvement programs. Consequently, it is pivotal to nurture agreement among policy-makers, patients and caregivers as to the essence of the dilemma: "What is quality in community care?" Meanwhile, we may suggest a primordial definition to community-based health care quality management: An ongoing multidisciplinary effort to identify and respond to the needs of patients, by

  19. Fee-Based Services in ARL Libraries. SPEC Kit 157.

    ERIC Educational Resources Information Center

    Josephine, Helen

    In November 1988 the Association of Research Libraries (ARL) mailed a survey to 59 of its university library members asking about their fee-based services and the impact of these services on other library development efforts. Overall, 79% of the respondents have fee-based services. In some cases, fees are applied to all users regardless of their…

  20. Research on e-learning services based on ontology theory

    NASA Astrophysics Data System (ADS)

    Liu, Rui

    2013-07-01

    E-learning services can realize network learning resource sharing and interoperability, but they can't realize automatic discovery, implementation and integration of services. This paper proposes a framework of e-learning services based on ontology, the ontology technology is applied to the publication and discovery process of e-learning services, in order to realize accurate and efficient retrieval and utilization of e-learning services.

  1. Welfare dynamics, support services, mothers' earnings, and child cognitive development: implications for contemporary welfare reform.

    PubMed

    Yoshikawa, H

    1999-01-01

    This prospective longitudinal study, using data from the National Longitudinal Survey of Youth (NLSY; N = 614), addresses the gap in the research literature regarding the effects of welfare reform on children. Key questions addressed include whether welfare dynamics and support services relevant to welfare reform, both measured across the first 5 years of life, are associated with mothers' earnings in the 6th year and three child cognitive outcomes in the 7th and 8th years: Peabody Individual Achievement Test (PIAT) math and reading scores, and the Peabody Picture Vocabulary Test (PPVT). Welfare dynamics are represented by total time on welfare, degree of cycling on and off welfare, and degree to which welfare and work are combined. Support services measured include three forms of child care (relative, babysitter, and center-based), as well as three forms of human capital supports (child support, job training, and education). Controlling for a range of background factors and for different patterns of welfare use across the first 5 years, small positive associations with mother's earnings were found for child support, education, and job training. Small positive associations also were found between child support and both math and reading scores. Finally positive associations of medium effect size were found between center care and both mothers' earnings and child PPVT scores. Although effect sizes are generally small, the results suggest the potential value of welfare reform approaches that emphasize long-term human capital development. Interactions between welfare dynamics and support services suggest subgroup differences. Specifically, positive effects of support services on earnings are strongest among mothers with higher levels of human capital (higher levels of work while on welfare, lower total time on welfare). Babysitter care appears to have negative effects on both reading and math scores of children whose mothers report low levels of work while on welfare

  2. Telephone survey of service-user experiences of a telephone-based mental health triage service.

    PubMed

    Elsom, Stephen; Sands, Natisha; Roper, Cath; Hoppner, Cayte; Gerdtz, Marie

    2013-10-01

    The participation of service users in all aspects of mental health service delivery including policy development, service planning and evaluation is increasingly an expectation of contemporary mental health care. Although there are a growing number of publications reporting service-user perspectives in the evaluation of mental health services, little attention has been paid to the views of service users about mental health triage services. The purpose of the study reported here was to examine service-users' (consumers and informal carers) experiences of a telephone-based mental health triage service. Using a framework developed from the World Health Organisation's elements of responsiveness, we conducted structured telephone interviews with service users who had contacted a telephone-based mental health triage service in regional Victoria, Australia. The main findings of the study were that consumers experienced more difficulty than carers in accessing the service and that, although most participants were satisfied, only a minority reported being involved in decision-making. Further work is needed to improve accessibility of mental health triage services and to investigate barriers to consumer self-referral. Professional development and practice support systems should be established to support mental health triage nurses in the development of collaborative, consumer-focused care.

  3. Location-Based Rainfall Nowcasting Service for Public

    NASA Astrophysics Data System (ADS)

    Woo, Wang-chun

    2013-04-01

    The Hong Kong Observatory has developed the "Short-range Warning of Intense Rainstorms in Localized Systems (SWIRLS)", a radar-based rainfall nowcasting system originally to support forecasters in rainstorm warning and severe weather forecasting such as hail, lightning and strong wind gusts in Hong Kong. The system has since been extended to provide rainfall nowcast service direct for the public in recent years. Following the launch of "Rainfall Nowcast for the Pearl River Delta Region" service provided via a Geographical Information System (GIS) platform in 2008, a location-based rainfall nowcast service served through "MyObservatory", a smartphone app for iOS and Android developed by the Observatory, debuted in September 2012. The new service takes advantage of the capability of smartphones to detect own locations and utilizes the quantitative precipitation forecast (QPF) from SWIRLS to provide location-based rainfall nowcast to the public. The conversion of radar reflectivity data (at 2 or 3 km above ground) to rainfall in SWIRLS is based on the Z-R relationship (Z=aRb) with dynamical calibration of the coefficients a and b determined using real-time rain gauge data. Adopting the "Multi-scale Optical-flow by Variational Analysis (MOVA)" scheme to track the movement of radar echoes and Semi-Lagrangian Advection (SLA) scheme to extrapolate their movement, the system is capable of producing QPF for the next six hours in a grid of 480 x 480 that covers a domain of 256 km x 256 km once every 6 minutes. Referencing the closest point in a resampled 2-km grid over the territory of Hong Kong, a prediction as to whether there will be rainfall exceeding 0.5 mm in every 30 minute intervals for the next two hours at users' own or designated locations are made available to the users in both textual and graphical format. For those users who have opted to receive notifications, a message would pop up on the user's phone whenever rain is predicted in the next two hours in a user

  4. Semantic-based web service discovery and chaining for building an Arctic spatial data infrastructure

    NASA Astrophysics Data System (ADS)

    Li, W.; Yang, C.; Nebert, D.; Raskin, R.; Houser, P.; Wu, H.; Li, Z.

    2011-11-01

    Increasing interests in a global environment and climate change have led to studies focused on the changes in the multinational Arctic region. To facilitate Arctic research, a spatial data infrastructure (SDI), where Arctic data, information, and services are shared and integrated in a seamless manner, particularly in light of today's climate change scenarios, is urgently needed. In this paper, we utilize the knowledge-based approach and the spatial web portal technology to prototype an Arctic SDI (ASDI) by proposing (1) a hybrid approach for efficient service discovery from distributed web catalogs and the dynamic Internet; (2) a domain knowledge base to model the latent semantic relationships among scientific data and services; and (3) an intelligent logic reasoning mechanism for (semi-)automatic service selection and chaining. A study of the influence of solid water dynamics to the bio-habitat of the Arctic region is used as an example to demonstrate the prototype.

  5. A Mediator-Based Approach to Resolving Interface Heterogeneity of Web Services

    NASA Astrophysics Data System (ADS)

    Leitner, Philipp; Rosenberg, Florian; Michlmayr, Anton; Huber, Andreas; Dustdar, Schahram

    In theory, service-oriented architectures are based on the idea of increasing flexibility in the selection of internal and external business partners using loosely-coupled services. However, in practice this flexibility is limited by the fact that partners need not only to provide the same service, but to do so via virtually the same interface in order to actually be interchangeable easily. Invocation-level mediation may be used to overcome this issue — by using mediation interface differences can be resolved transparently at runtime. In this chapter we discuss the basic ideas of mediation, with a focus on interface-level mediation. We show how interface mediation is integrated into our dynamic Web service invocation framework DAIOS, and present three different mediation strategies, one based on structural message similarity, one based on semantically annotated WSDL, and one which is embedded into the VRESCo SOA runtime, a larger research project with explicit support for service mediation.

  6. Weak and Dynamic GNSS Signal Tracking Strategies for Flight Missions in the Space Service Volume.

    PubMed

    Jing, Shuai; Zhan, Xingqun; Liu, Baoyu; Chen, Maolin

    2016-09-02

    Weak-signal and high-dynamics are of two primary concerns of space navigation using GNSS (Global Navigation Satellite System) in the space service volume (SSV). The paper firstly defines a reference assumption third-order phase-locked loop (PLL) as the baseline of an onboard GNSS receiver, and proves the incompetence of this conventional architecture. Then an adaptive four-state Kalman filter (KF)-based algorithm is introduced to realize the optimization of loop noise bandwidth, which can adaptively regulate its filter gain according to the received signal power and line-of-sight (LOS) dynamics. To overcome the matter of losing lock in weak-signal and high-dynamic environments, an open loop tracking strategy aided by an inertial navigation system (INS) is recommended, and the traditional maximum likelihood estimation (MLE) method is modified in a non-coherent way by reconstructing the likelihood cost function. Furthermore, a typical mission with combined orbital maneuvering and non-maneuvering arcs is taken as a destination object to test the two proposed strategies. Finally, the experiment based on computer simulation identifies the effectiveness of an adaptive four-state KF-based strategy under non-maneuvering conditions and the virtue of INS-assisted methods under maneuvering conditions.

  7. Weak and Dynamic GNSS Signal Tracking Strategies for Flight Missions in the Space Service Volume

    PubMed Central

    Jing, Shuai; Zhan, Xingqun; Liu, Baoyu; Chen, Maolin

    2016-01-01

    Weak-signal and high-dynamics are of two primary concerns of space navigation using GNSS (Global Navigation Satellite System) in the space service volume (SSV). The paper firstly defines a reference assumption third-order phase-locked loop (PLL) as the baseline of an onboard GNSS receiver, and proves the incompetence of this conventional architecture. Then an adaptive four-state Kalman filter (KF)-based algorithm is introduced to realize the optimization of loop noise bandwidth, which can adaptively regulate its filter gain according to the received signal power and line-of-sight (LOS) dynamics. To overcome the matter of losing lock in weak-signal and high-dynamic environments, an open loop tracking strategy aided by an inertial navigation system (INS) is recommended, and the traditional maximum likelihood estimation (MLE) method is modified in a non-coherent way by reconstructing the likelihood cost function. Furthermore, a typical mission with combined orbital maneuvering and non-maneuvering arcs is taken as a destination object to test the two proposed strategies. Finally, the experiment based on computer simulation identifies the effectiveness of an adaptive four-state KF-based strategy under non-maneuvering conditions and the virtue of INS-assisted methods under maneuvering conditions. PMID:27598164

  8. Continuous dynamic monitoring of a lively footbridge for serviceability assessment and damage detection

    NASA Astrophysics Data System (ADS)

    Hu, Wei-Hua; Moutinho, Carlos; Caetano, Elsa; Magalhães, Filipe; Cunha, Álvaro

    2012-11-01

    This paper aims at analyzing the feasibility of applying a vibration based damage detection approach, based on Principal Components Analysis (PCA), to eliminate environmental effects using the large amount of high quality data continuously collected by the dynamic monitoring system of Pedro e Inês footbridge since 2007. Few works describe real data, regularly collected along several years by reliable continuous dynamic monitoring systems in bridge structures. One main contribution is to show a large difference between making academic research based on numerical simulations or limited experimental samples, and making validity tests of innovative procedures using large high quality databases collected in real structures. The monitoring system, installed with the only initial objective of checking the efficiency of vibration control devices used to mitigate lateral and vertical vibrations, was therefore further developed for research purposes by implementing LabVIEW based automated signal processing and output-only modal identification routines, that enabled the analysis of the correlation of modal estimates with the temperature and the vibration level, as well as the automatic tracking of modal parameters along several years. With the final purpose of detecting potential structural damage at an early stage, the Principal Components Analysis (PCA) was employed to effectively eliminate temperature effects, whereas Novelty Analysis on the residual errors of the PCA model was used to provide a statistical indication of damage. The efficiency of this vibration based damage detection approach was verified using 3 years of measurements at Pedro e Inês footbridge under operational conditions and simulating several realistic damage scenarios affecting the boundary conditions. It is demonstrated that such a dynamic monitoring system, apart from providing relevant instantaneous dynamic information, working as an alert system associated to the verification of vibration

  9. A grid service-based active thermochemical table framework.

    SciTech Connect

    von Laszewski, G.; Ruscic, B.; Wagstrom, P.; Krishnan, S.; Amin, K.; Nijsure, S.; Bittner, S.; Pinzon, R.; Hewson, J. C.; Morton, M. L.; Minkoff, M.; Wagner, A.; SNL

    2002-01-01

    In this paper we report our work on the integration of existing scientific applications using Grid Services. We describe a general architecture that provides access to these applications via Web services-based application factories. Furthermore, we demonstrate how such services can interact with each other.

  10. Developing a rural community-based disability service: (I) service framework and implementation strategy.

    PubMed

    Kuipers, P; Kendall, E; Hancock, T

    2001-02-01

    In response to widely recognised dilemmas associated with rehabilitation and disability service provision in remote and rural areas of Australia, a community-based, participatory approach to service development was adapted for a disability service project in central Queensland. The service framework, known as Community Based Rehabilitation (CBR), fosters the involvement of community members in disability service provision. Although this framework has been described previously, few guidelines exist regarding appropriate implementation of such an approach. Consequently, the implementation strategy known as Participatory Rural Appraisal (PRA) was adopted. Participatory Rural Appraisal has been reported to foster the participation and decision-making of community members in community projects. The present article describes the application of this implementation strategy to disability service provision in a relatively under-resourced rural shire. The rationale, framework and process of the pilot are described. A subsequent publication will document the service component, detail evaluation findings and describe the long-term outcomes of this research.

  11. WebGIS based community services architecture by griddization managements and crowdsourcing services

    NASA Astrophysics Data System (ADS)

    Wang, Haiyin; Wan, Jianhua; Zeng, Zhe; Zhou, Shengchuan

    2016-11-01

    Along with the fast economic development of cities, rapid urbanization, population surge, in China, the social community service mechanisms need to be rationalized and the policy standards need to be unified, which results in various types of conflicts and challenges for community services of government. Based on the WebGIS technology, the article provides a community service architecture by gridding management and crowdsourcing service. The WEBGIS service architecture includes two parts: the cloud part and the mobile part. The cloud part refers to community service centres, which can instantaneously response the emergency, visualize the scene of the emergency, and analyse the data from the emergency. The mobile part refers to the mobile terminal, which can call the centre, report the event, collect data and verify the feedback. This WebGIS based community service systems for Huangdao District of Qingdao, were awarded the “2015’ national innovation of social governance case of typical cases”.

  12. The Dynamics of Service of Higher Education: A Comparative Study

    ERIC Educational Resources Information Center

    Abukari, Abdulai

    2010-01-01

    Higher education institutions seem to be becoming increasingly flexible with different functions. Most universities' mission statements involve teaching, research and service, but while the teaching and research missions are clearly defined and located within certain areas of the university activities, service is less clear and more ambiguous,…

  13. Leadership Dynamics Promoting Systemic Reform for Inclusive Service Delivery

    ERIC Educational Resources Information Center

    Scanlan, Martin

    2009-01-01

    This article presents a multicase study of two systems of schools striving to reform service delivery systems for students with special needs. Considering these systems as institutional actors, the study examines what promotes the understanding and implementation of special education service delivery within a system of schools in a manner that…

  14. Acceptability of Service Targets for ICT-Based Healthcare

    PubMed Central

    Jeon, Eun Min

    2016-01-01

    Objectives In order to adopt and activate telemedicine it is necessary to survey how medical staff, who are providers of medical service, and consumers, who are the service targets, perceive information and communication technology (ICT)-based healthcare service. Methods This study surveyed the awareness and acceptability of ICT-based healthcare by involving service targets, specifically workers and students living in the Seoul and Gyeonggi regions who are consumers of healthcare service. To determine the correlation among awareness of ICT-based healthcare, the need for self-management, and acceptability, this study conducted a correlation analysis and a simple regression analysis. Results According to the responses to the questions on the need for ICT-based healthcare service by item, blood pressure (n = 279, 94.3%) and glucose (n = 277, 93.6%) were revealed to be the physiological signal monitoring area. Among the six measurement factors affecting ICT-based healthcare service acceptability, age, health concerns, and effect expectation had the most significant effects. As effect expectation increased, acceptability became 4.38 times higher (p < 0.05). Conclusions This study identified a positive awareness of service targets on ICT-based healthcare service. The fact that acceptability is higher among people who have family disease history or greater health concerns may lead to service targets’ more active participation. This study also confirmed that a policy to motivate active participation of those in their 40s (who had high prevalence rates) was needed. PMID:27895966

  15. Delivery of satellite based broadband services

    NASA Astrophysics Data System (ADS)

    Chandrasekhar, M. G.; Venugopal, D.

    2007-06-01

    Availability of speedy communication links to individuals and organizations is essential to keep pace with the business and social requirements of this modern age. While the PCs have been continuously growing in processing speed and memory capabilities, the availability of broadband communication links still has not been satisfactory in many parts of the world. Recognizing the need to give fillip to the growth of broadband services and improve the broadband penetration, the telecom policies of different counties have placed special emphasis on the same. While emphasis is on the use of fiber optic and copper in local loop, satellite communications systems will play an important role in quickly establishing these services in areas where fiber and other communication systems are not available and are not likely to be available for a long time to come. To make satellite communication systems attractive for the wide spread of these services in a cost effective way special emphasis has to be given on factors affecting the cost of the bandwidth and the equipment. As broadband services are bandwidth demanding, use of bandwidth efficient modulation technique and suitable system architecture are some of the important aspects that need to be examined. Further there is a need to re-look on how information services are provided keeping in view the user requirements and broadcast capability of satellite systems over wide areas. This paper addresses some of the aspects of delivering broadband services via satellite taking Indian requirement as an example.

  16. Coordination, Organisation and Model-driven Approaches for Dynamic, Flexible, Robust Software and Services Engineering

    NASA Astrophysics Data System (ADS)

    Nieves, Juan Carlos; Padget, Julian; Vasconcelos, Wamberto; Staikopoulos, Athanasios; Cliffe, Owen; Dignum, Frank; Vázquez-Salceda, Javier; Clarke, Siobhán; Reed, Chris

    Enterprise systems are increasingly composed of (and even functioning as) components in a dynamic, digital ecosystem. On the one hand, this new situation requires flexible, spontaneous and opportunistic collaboration activities to be identified and established among (electronic) business parties. On the other, it demands engineering methods that are able to integrate new functionalities and behaviours into running systems composed by active, distributed, interdependent processes. Here we present a multi-level architecture that combines organisational and coordination theories with model driven development, for the implementation, deployment and management of dynamic, flexible and robust service-oriented business applications, combined with a service layer that accommodates semantic service description, fine-grained semantic service discovery and the dynamic adaptation of services to meet changing circumstances.

  17. School-Based Counselling and Psychological Services in Macao

    ERIC Educational Resources Information Center

    van Schalkwyk, Gertina J.

    2013-01-01

    This article presents an overview of the current status of school-based counselling and psychological services for school-going children and their families in Macao. Adopting an eco-systemic model, some recent articles on school-based counselling and psychological services in Southeast Asian countries are reviewed, and similar data from…

  18. Community-based Service Learning for Multicultural Teacher Education.

    ERIC Educational Resources Information Center

    Boyle-Baise, Marilynne; Sleeter, Christine E.

    2000-01-01

    Creates a topology of preservice teachers' responses to community-based service learning within several courses, investigating meanings they made from their community experiences. Data came from interviews and student essays and papers. The article considers the potential value of community- based service learning as an aspect of multicultural…

  19. WSDRI-based Semantic Web Service Discovery Framework

    NASA Astrophysics Data System (ADS)

    Sun, Xu; Xu, Yanli; Mao, Mingrong; Dong, Ming

    In the research of Web Service [1, 2], semantic information should be automatically discovered, selected and composed. These automations can make usage of Web Service easily. In this paper we propose a framework to facilitate the discovery of Web Service. In this framework, we use WSDRI (Web Service Discovery Information) to describe the semantic information. This framework which refers to client and Match Server is based on WSDRI. Then we evaluate the framework through the application on the internet to find that the framework is effective. Following this framework, it could be easy to discover the information of Web Service especially the semantic information.

  20. Constraint Web Service Composition Based on Discrete Particle Swarm Optimization

    NASA Astrophysics Data System (ADS)

    Fang, Xianwen; Fan, Xiaoqin; Yin, Zhixiang

    Web service composition provides an open, standards-based approach for connecting web services together to create higher-level business processes. The Standards are designed to reduce the complexity required to compose web services, hence reducing time and costs, and increase overall efficiency in businesses. This paper present independent global constrains web service composition optimization methods based on Discrete Particle Swarm Optimization (DPSO) and associate Petri net (APN). Combining with the properties of APN, an efficient DPSO algorithm is presented which is used to search a legal firing sequence in the APN model. Using legal firing sequences of the Petri net makes the service composition locating space based on DPSO shrink greatly. Finally, for comparing our methods with the approximating methods, the simulation experiment is given out. Theoretical analysis and experimental results indicate that this method owns both lower computation cost and higher success ratio of service composition.

  1. Taking advantage of Google's Web-based applications and services.

    PubMed

    Brigham, Tara J

    2014-01-01

    Google is a company that is constantly expanding and growing its services and products. While most librarians possess a "love/hate" relationship with Google, there are a number of reasons you should consider exploring some of the tools Google has created and made freely available. Applications and services such as Google Docs, Slides, and Google+ are functional and dynamic without the cost of comparable products. This column will address some of the issues users should be aware of before signing up to use Google's tools, and a description of some of Google's Web applications and services, plus how they can be useful to librarians in health care.

  2. Supporting quality of service by using delta dynamic bandwidth allocations in Ethernet passive optical networks

    NASA Astrophysics Data System (ADS)

    Yang, Yeon-Mo; Ahn, Byung-Ha; Nho, Ji-Myong

    2005-02-01

    In Ethernet passive optical networks (EPONs), dynamic bandwidth allocation (DBA) has to provide efficient and statistical multiplexing between the optical network units for better upstream use. Here a new burst-polling-based delta (DBA) scheme is proposed for quality of service (QoS) using class of service (CoS) in EPONs. The proposed scheme consists of two parts: one is inter-ONU scheduling, which is a delta DBA based on burst polling, and the other is OLT-based intra-ONU scheduling, a differentiated priority queuing method at egress, in which three kinds of traffic classes have been considered, such as expedited forwarding (EF), assured forwarding (AF), and best effort (BE). With the proposed scheme, it has been shown that the network resources are optimally utilized and adaptively allocated to the three traffic classes by guaranteeing the requested QoS. For the verification and validation of the algorithm, experimental simulation results using OPNET have been presented, and these show that the proposed scheme under varying offered loads gives an improvement compared with the other DBA schemes in the content of (criteria) packet delay, queue length, and channel utilization--especially when the offered load is beyond the system's capacity. Specifically, packet-delay variations (PDV) for different classes of traffic are demonstrated.

  3. Robotic simulation of flexible-body spacecraft dynamics in a satellite servicing testbed

    NASA Astrophysics Data System (ADS)

    Brannan, Justin Cory

    Satellite failures that once led to end-of-life may eventually be addressed using robotic servicing platforms. The ability to model and simulate the physical interaction between two free-floating spacecraft is a key aspect of robotic servicing, and understanding how large appendages such as solar panels, antenna arrays and booms affect the combined system dynamics may be critical to mission operations. This research presents a model of the coupled rigid- and flexible-body satellite dynamics that can be implemented on a robotic satellite simulator. The coupled dynamics are validated against a commercially available dynamics software package, and robot hardware-in-the-loop tests are conducted to demonstrate how the dynamics model is able to predict the response of a robot mass simulator outfitted with physical appendages. Through both validation efforts, a flexible-body simulation is developed to observe the resulting dynamics of a given satellite system on-orbit.

  4. Satellite-Based Educational Services. Technical Memorandum.

    ERIC Educational Resources Information Center

    Operations Research, Inc., Silver Spring, MD.

    This memorandum contains engineering information relevant to the use of communication satellites for educational purposes. Information is provided for ground terminals as well as satellites. Satellite related issues addressed include: (1) expected life of service of various satellites, (2) constraints on the availability of the satellites, (3)…

  5. School-Based Health Services: Administrative Rules.

    ERIC Educational Resources Information Center

    Oregon State Dept. of Human Resources, Salem.

    This manual outlines the State of Oregon's program to reimburse medical providers furnishing health services to students with medical disabilities in special education settings. The program was established to comply with federal provisions of the Individuals with Disabilities Education Act of 1990. The guide will assist school personnel in…

  6. Teaching Evidence-Based Practice in Service-Learning: A Model for Education and Service

    ERIC Educational Resources Information Center

    Terry, John D.; Smith, Bradley H.; McQuillin, Samuel D.

    2014-01-01

    Evidence-based practice (EBP) is strongly emphasized in many professions and should be taught as part of pre-professional training or to promote the development of enlightened citizens who utilize professional services. Service-learning (SL) classes provide an excellent opportunity to provide meaningful training in how EBP relates to education,…

  7. Adventure-Based Service Learning: University Students' Self-Reflection Accounts of Service with Children

    ERIC Educational Resources Information Center

    Quezada, Reyes L.; Christopherson, Richard W.

    2005-01-01

    The need to provide alternative and exciting community service-learning experiences with university students has been a challenge to institutions of higher education. One institution was able to capitalize on an idea of integrating challenge and adventure-based activities as a form of community service. This article focuses on undergraduate…

  8. Service quality, trust, and patient satisfaction in interpersonal-based medical service encounters

    PubMed Central

    2013-01-01

    Background Interaction between service provider and customer is the primary core of service businesses of different natures, and the influence of trust on service quality and customer satisfaction could not be ignored in interpersonal-based service encounters. However, lack of existing literature on the correlation between service quality, patient trust, and satisfaction from the prospect of interpersonal-based medical service encounters has created a research gap in previous studies. Therefore, this study attempts to bridge such a gap with an evidence-based practice study. Methods We adopted a cross-sectional design using a questionnaire survey of outpatients in seven medical centers of Taiwan. Three hundred and fifty copies of questionnaire were distributed, and 285 valid copies were retrieved, with a valid response rate of 81.43%. The SPSS 14.0 and AMOS 14.0 (structural equation modeling) statistical software packages were used for analysis. Structural equation modeling clarifies the extent of relationships between variables as well as the chain of cause and effect. Restated, SEM results do not merely show empirical relationships between variables when defining the practical situation. For this reason, SEM was used to test the hypotheses. Results Perception of interpersonal-based medical service encounters positively influences service quality and patient satisfaction. Perception of service quality among patients positively influences their trust. Perception of trust among patients positively influences their satisfaction. Conclusions According to the findings, as interpersonal-based medical service encounters will positively influence service quality and patient satisfaction, and the differences for patients’ perceptions of the professional skill and communication attitude of personnel in interpersonal-based medical service encounters will influence patients’ overall satisfaction in two ways: (A) interpersonal-based medical service encounter directly

  9. System Dynamics Modeling for Intellectual Disability Services: A Case Study

    ERIC Educational Resources Information Center

    Duryan, Meri; Nikolik, Dragan; van Merode, Godefridus; Curfs, Leopold

    2012-01-01

    Organizations providing services to persons with intellectual disabilities (ID) are complex because of many interacting stakeholders with often different and competing interests. The combination of increased consumer demand and diminished resources makes organizational planning a challenge for the managers of such organizations. Such challenges…

  10. Simulation of the change of regional ecosystem services value based on CA-Markov

    NASA Astrophysics Data System (ADS)

    Chen, Qiuji; Yao, Wanqiang

    2008-10-01

    During the last few years, the value of ecosystem services, the possibilities and rationalities of evaluating these services have attracted interests of many ecologists and economists. However, the dynamic change of ecosystem services is less studied. In this paper, the dynamic simulation method (i.e., CA-Markov) is used to simulate the change of ecosystem services value in research area. The main objective of this study is to give comprehensive and reasonable assessment of the ecosystem services value change in the research area which would provide scientific basis for environment, ecosystem construction and strategic decisions. Based on the remote sensing dada of year 1992 and 2003, the landscape information of research area is obtained, and the transfer matrix among various landscapes is calculated during the period, then the data of landscape of research area in year 2015 is predicted using the model of CA-Markov. Then the change of ecosystem services value is calculated based on the value coefficient of various landscapes. The research demonstrates that the CA-Markov is a good tool for simulating the change of ecosystem services value. The studied result can provide scientific basis for ecosystem construction and strategic decisions.

  11. P2MP MPLS-Based Hierarchical Service Management System

    NASA Astrophysics Data System (ADS)

    Kumaki, Kenji; Nakagawa, Ikuo; Nagami, Kenichi; Ogishi, Tomohiko; Ano, Shigehiro

    This paper proposes a point-to-multipoint (P2MP) Multi-Protocol Label Switching (MPLS) based hierarchical service management system. Traditionally, general management systems deployed in some service providers control MPLS Label Switched Paths (LSPs) (e.g., RSVP-TE and LDP) and services (e.g., L2VPN, L3VPN and IP) separately. In order for dedicated management systems for MPLS LSPs and services to cooperate with each other automatically, a hierarchical service management system has been proposed with the main focus on point-to-point (P2P) TE LSPs in MPLS path management. In the case where P2MP TE LSPs and services are deployed in MPLS networks, the dedicated management systems for P2MP TE LSPs and services must work together automatically. Therefore, this paper proposes a new algorithm that uses a correlation between P2MP TE LSPs and multicast VPN services based on a P2MP MPLS-based hierarchical service management architecture. Also, the capacity and performance of the proposed algorithm are evaluated by simulations, which are actually based on certain real MPLS production networks, and are compared to that of the algorithm for P2P TE LSPs. Results show this system is very scalable within real MPLS production networks. This system, with the automatic correlation, appears to be deployable in real MPLS production networks.

  12. Measurements-based performance evaluation of 3G wireless networks supporting m-health services

    NASA Astrophysics Data System (ADS)

    Wac, Katarzyna E.; Bults, Richard; van Halteren, Aart; Konstantas, Dimitri; Nicola, Victor F.

    2004-12-01

    The emergence of 3G networks gives rise to new mobile services in many different areas of our daily life. Examples of demanding mobile services are mobile-healthcare (i.e. m-health) services allowing the continuous monitoring of a patient"s vital signs. However, a prerequisite for the successful deployment of m-health services are appropriate performance characteristics of transport services offered by an underlying wireless network (e.g. 3G). In this direction, the EU MobiHealth project targeted the evaluation of 3G networks and their ability to support demanding m-health services. The project developed and trialled a patient monitoring system, evaluating at the same time the network"s performance. This paper presents measurements based performance evaluation methodology developed and applied to assess network performance from an end-user perspective. In addition, it presents the (selected) speed-related evaluation (best-case scenario) results collected during the project. Our measurements show the dynamicity in the performance of 3G networks and phenomena negatively influencing this performance. Based on the evaluation results, we conclude that in-spite of certain shortcomings of existing 3G networks, they are suitable to support a significant set of m-health services. A set of recommendations provide a road map for both operators and service developers for design and deployment of m-health services.

  13. Measurements-based performance evaluation of 3G wireless networks supporting m-health services

    NASA Astrophysics Data System (ADS)

    Wac, Katarzyna E.; Bults, Richard; van Halteren, Aart; Konstantas, Dimitri; Nicola, Victor F.

    2005-01-01

    The emergence of 3G networks gives rise to new mobile services in many different areas of our daily life. Examples of demanding mobile services are mobile-healthcare (i.e. m-health) services allowing the continuous monitoring of a patient"s vital signs. However, a prerequisite for the successful deployment of m-health services are appropriate performance characteristics of transport services offered by an underlying wireless network (e.g. 3G). In this direction, the EU MobiHealth project targeted the evaluation of 3G networks and their ability to support demanding m-health services. The project developed and trialled a patient monitoring system, evaluating at the same time the network's performance. This paper presents measurements based performance evaluation methodology developed and applied to assess network performance from an end-user perspective. In addition, it presents the (selected) speed-related evaluation (best-case scenario) results collected during the project. Our measurements show the dynamicity in the performance of 3G networks and phenomena negatively influencing this performance. Based on the evaluation results, we conclude that in-spite of certain shortcomings of existing 3G networks, they are suitable to support a significant set of m-health services. A set of recommendations provide a road map for both operators and service developers for design and deployment of m-health services.

  14. Starting a Fee-Based Systematic Review Service.

    PubMed

    Knehans, Amy; Dell, Esther; Robinson, Cynthia

    2016-01-01

    The George T. Harrell Health Sciences Library at Penn State College of Medicine began a fee-based systematic review service, a model for cost recovery, in October 2013. This article describes the library's experience in establishing, introducing, and promoting the new service, which follows the Institute of Medicine's recommended standards for performing systematic reviews. The goal is to share this information with librarians who are contemplating starting such a service.

  15. Bases for Vocational Education for Food Service Industry Employees.

    ERIC Educational Resources Information Center

    Iowa State Univ. of Science and Technology, Ames.

    As a preliminary step in establishing bases for food service training programs, data were collected from a sample of institutions including 4,496 restaurants, 158 hospitals, 436 nursing homes, and 343 custodial homes. A second phase involved developing inventories of attitudes toward food service employment and administering them to high school…

  16. Mental Health Care in a High School Based Health Service.

    ERIC Educational Resources Information Center

    Jepson, Lisa; Juszczak, Linda; Fisher, Martin

    1998-01-01

    Describes the mental-health and medical services provided at a high-school-based service center. Five years after the center's inception mental health visits had quadrupled. One third of students utilizing the center reported substance abuse within their family. Other reasons for center use included pregnancy, suicidal ideation, obesity,…

  17. Challenges and Realities: Evaluating a School-Based Service Project.

    ERIC Educational Resources Information Center

    Keir, Scott S.; Millea, Susan

    The Hogg Foundation for Mental Health created the School of the Future (SoF) project to enable selected Texas schools to coordinate and implement school-based social and health services on their campuses and to demonstrate the effectiveness of this method of service delivery by evaluating the project to show the process used and the outcomes that…

  18. Policy-Aware Sender Anonymity in Location-Based Services

    ERIC Educational Resources Information Center

    Vyas, Avinash

    2011-01-01

    Sender anonymity in Location-based services (LBS) refers to hiding the identity of a mobile device user who sends requests to the LBS provider for services in her proximity (e.g. "find the nearest gas station etc."). The goal is to keep the requester's interest private even from attackers who (via hacking or subpoenas) gain access to the LBS…

  19. Optimization-based Dynamic Human Lifting Prediction

    DTIC Science & Technology

    2008-06-01

    Anith Mathai, Steve Beck,Timothy Marler , Jingzhou Yang, Jasbir S. Arora, Karim Abdel-Malek Virtual Soldier Research Program, Center for Computer Aided...Rahmatalla, S., Kim, J., Marler , T., Beck, S., Yang, J., busek, J., Arora, J.S., and Abdel-Malek, K. Optimization-based dynamic human walking prediction

  20. Performance Prediction of Service-Oriented Applications based on an Enterprise Service Bus

    SciTech Connect

    Liu, Yan; Gorton, Ian; Zhu, Liming

    2007-07-27

    An Enterprise Service Bus (ESB) is a standards-based integration platform that combines messaging, web services, data transformation, and intelligent routing in a highly distributed environment. The ESB has been adopted as a key component of SOA infrastructures. For SOA implementations with large number of users, services, or traffic, maintaining the necessary performance levels of applications integrated using an ESB presents a substantial challenge, both to the architects who design the infrastructure as well as to IT professionals who are responsible for administration. In this paper, we develop a performance model for analyzing and predicting the runtime performance of service applications composed on a COTS ESB platform. Our approach utilizes benchmarking techniques to measure primitive performance overheads of service routing activities in the ESB. The performance characteristics of the ESB and services running on the ESB are modeled in a queuing network, which facilitates the performance prediction of service oriented applications. This model is validated by an example ESB based service application modeled from real world loan broking business application.

  1. Reinforcement Learning Based Web Service Compositions for Mobile Business

    NASA Astrophysics Data System (ADS)

    Zhou, Juan; Chen, Shouming

    In this paper, we propose a new solution to Reactive Web Service Composition, via molding with Reinforcement Learning, and introducing modified (alterable) QoS variables into the model as elements in the Markov Decision Process tuple. Moreover, we give an example of Reactive-WSC-based mobile banking, to demonstrate the intrinsic capability of the solution in question of obtaining the optimized service composition, characterized by (alterable) target QoS variable sets with optimized values. Consequently, we come to the conclusion that the solution has decent potentials in boosting customer experiences and qualities of services in Web Services, and those in applications in the whole electronic commerce and business sector.

  2. 38 CFR 3.313 - Claims based on service in Vietnam.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Claims based on service... Evaluations; Service Connection § 3.313 Claims based on service in Vietnam. (a) Service in Vietnam. Service in Vietnam includes service in the waters offshore, or service in other locations if the conditions...

  3. 38 CFR 3.313 - Claims based on service in Vietnam.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2011-07-01 2011-07-01 false Claims based on service... Evaluations; Service Connection § 3.313 Claims based on service in Vietnam. (a) Service in Vietnam. Service in Vietnam includes service in the waters offshore, or service in other locations if the conditions...

  4. 38 CFR 3.313 - Claims based on service in Vietnam.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2014-07-01 2014-07-01 false Claims based on service... Evaluations; Service Connection § 3.313 Claims based on service in Vietnam. (a) Service in Vietnam. Service in Vietnam includes service in the waters offshore, or service in other locations if the conditions...

  5. 38 CFR 3.313 - Claims based on service in Vietnam.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2013-07-01 2013-07-01 false Claims based on service... Evaluations; Service Connection § 3.313 Claims based on service in Vietnam. (a) Service in Vietnam. Service in Vietnam includes service in the waters offshore, or service in other locations if the conditions...

  6. Compression-based aggregation model for medical web services.

    PubMed

    Al-Shammary, Dhiah; Khalil, Ibrahim

    2010-01-01

    Many organizations such as hospitals have adopted Cloud Web services in applying their network services to avoid investing heavily computing infrastructure. SOAP (Simple Object Access Protocol) is the basic communication protocol of Cloud Web services that is XML based protocol. Generally,Web services often suffer congestions and bottlenecks as a result of the high network traffic that is caused by the large XML overhead size. At the same time, the massive load on Cloud Web services in terms of the large demand of client requests has resulted in the same problem. In this paper, two XML-aware aggregation techniques that are based on exploiting the compression concepts are proposed in order to aggregate the medical Web messages and achieve higher message size reduction.

  7. 77 FR 1039 - Internet-Based Telecommunications Relay Service Numbering

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-09

    ... COMMISSION 47 CFR Part 64 Internet-Based Telecommunications Relay Service Numbering AGENCY: Federal... rules that govern access to toll-free numbers by users of Internet- based Telecommunications Relay... an impact on any rules of particular applicability. Subject: Internet-Based Telecommunications...

  8. Smart learning services based on smart cloud computing.

    PubMed

    Kim, Svetlana; Song, Su-Mi; Yoon, Yong-Ik

    2011-01-01

    Context-aware technologies can make e-learning services smarter and more efficient since context-aware services are based on the user's behavior. To add those technologies into existing e-learning services, a service architecture model is needed to transform the existing e-learning environment, which is situation-aware, into the environment that understands context as well. The context-awareness in e-learning may include the awareness of user profile and terminal context. In this paper, we propose a new notion of service that provides context-awareness to smart learning content in a cloud computing environment. We suggest the elastic four smarts (E4S)--smart pull, smart prospect, smart content, and smart push--concept to the cloud services so smart learning services are possible. The E4S focuses on meeting the users' needs by collecting and analyzing users' behavior, prospecting future services, building corresponding contents, and delivering the contents through cloud computing environment. Users' behavior can be collected through mobile devices such as smart phones that have built-in sensors. As results, the proposed smart e-learning model in cloud computing environment provides personalized and customized learning services to its users.

  9. Smart Learning Services Based on Smart Cloud Computing

    PubMed Central

    Kim, Svetlana; Song, Su-Mi; Yoon, Yong-Ik

    2011-01-01

    Context-aware technologies can make e-learning services smarter and more efficient since context-aware services are based on the user’s behavior. To add those technologies into existing e-learning services, a service architecture model is needed to transform the existing e-learning environment, which is situation-aware, into the environment that understands context as well. The context-awareness in e-learning may include the awareness of user profile and terminal context. In this paper, we propose a new notion of service that provides context-awareness to smart learning content in a cloud computing environment. We suggest the elastic four smarts (E4S)—smart pull, smart prospect, smart content, and smart push—concept to the cloud services so smart learning services are possible. The E4S focuses on meeting the users’ needs by collecting and analyzing users’ behavior, prospecting future services, building corresponding contents, and delivering the contents through cloud computing environment. Users’ behavior can be collected through mobile devices such as smart phones that have built-in sensors. As results, the proposed smart e-learning model in cloud computing environment provides personalized and customized learning services to its users. PMID:22164048

  10. Dynamic Policy-Driven Quality of Service in Service-Oriented Information Management Systems

    DTIC Science & Technology

    2011-01-01

    data sources , gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this...Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware ...constrained re- sources ) and the bottlenecks might change over time. Local enforcement to remove a single bottleneck might be ineffective if there are

  11. Cloud based intelligent system for delivering health care as a service.

    PubMed

    Kaur, Pankaj Deep; Chana, Inderveer

    2014-01-01

    The promising potential of cloud computing and its convergence with technologies such as mobile computing, wireless networks, sensor technologies allows for creation and delivery of newer type of cloud services. In this paper, we advocate the use of cloud computing for the creation and management of cloud based health care services. As a representative case study, we design a Cloud Based Intelligent Health Care Service (CBIHCS) that performs real time monitoring of user health data for diagnosis of chronic illness such as diabetes. Advance body sensor components are utilized to gather user specific health data and store in cloud based storage repositories for subsequent analysis and classification. In addition, infrastructure level mechanisms are proposed to provide dynamic resource elasticity for CBIHCS. Experimental results demonstrate that classification accuracy of 92.59% is achieved with our prototype system and the predicted patterns of CPU usage offer better opportunities for adaptive resource elasticity.

  12. Small changes in climate can profoundly alter the dynamics and ecosystem services of tropical crater lakes.

    PubMed

    Saulnier-Talbot, Émilie; Gregory-Eaves, Irene; Simpson, Kyle G; Efitre, Jackson; Nowlan, Tobias E; Taranu, Zofia E; Chapman, Lauren J

    2014-01-01

    African tropical lakes provide vital ecosystem services including food and water to some of the fastest growing human populations, yet they are among the most understudied ecosystems in the world. The consequences of climate change and other stressors on the tropical lakes of Africa have been informed by long-term analyses, but these studies have largely focused on the massive Great Rift Valley lakes. Our objective was to evaluate how recent climate change has altered the functioning and services of smaller tropical lakes, which are far more abundant on the landscape. Based on a paired analysis of 20 years of high-resolution water column data and a paleolimnological record from a small crater lake in western Uganda, we present evidence that even a modest warming of the air (∼0.9°C increase over 20 years) and changes in the timing and intensity of rainfall can have significant consequences on the dynamics of this common tropical lake type. For example, we observed a significant nonlinear increase (R(2) adj  = 0.23, e.d.f. = 7, p<0.0001) in thermal stability over the past 20 years. This resulted in the expansion of anoxic waters and consequent deterioration of fish habitat and appears to have abated primary production; processes that may impair ecosystem services for a vulnerable human population. This study on a system representative of small tropical crater lakes highlights the far-reaching effects of global climatic change on tropical waters. Increased research efforts into tropical aquatic ecosystem health and the development of sound management practices are necessary in order to strengthen adaptive capabilities in tropical regions.

  13. Small Changes in Climate Can Profoundly Alter the Dynamics and Ecosystem Services of Tropical Crater Lakes

    PubMed Central

    Saulnier-Talbot, Émilie; Gregory-Eaves, Irene; Simpson, Kyle G.; Efitre, Jackson; Nowlan, Tobias E.; Taranu, Zofia E.; Chapman, Lauren J.

    2014-01-01

    African tropical lakes provide vital ecosystem services including food and water to some of the fastest growing human populations, yet they are among the most understudied ecosystems in the world. The consequences of climate change and other stressors on the tropical lakes of Africa have been informed by long-term analyses, but these studies have largely focused on the massive Great Rift Valley lakes. Our objective was to evaluate how recent climate change has altered the functioning and services of smaller tropical lakes, which are far more abundant on the landscape. Based on a paired analysis of 20 years of high-resolution water column data and a paleolimnological record from a small crater lake in western Uganda, we present evidence that even a modest warming of the air (∼0.9°C increase over 20 years) and changes in the timing and intensity of rainfall can have significant consequences on the dynamics of this common tropical lake type. For example, we observed a significant nonlinear increase (R2adj = 0.23, e.d.f. = 7, p<0.0001) in thermal stability over the past 20 years. This resulted in the expansion of anoxic waters and consequent deterioration of fish habitat and appears to have abated primary production; processes that may impair ecosystem services for a vulnerable human population. This study on a system representative of small tropical crater lakes highlights the far-reaching effects of global climatic change on tropical waters. Increased research efforts into tropical aquatic ecosystem health and the development of sound management practices are necessary in order to strengthen adaptive capabilities in tropical regions. PMID:24497954

  14. Keystroke Dynamics-Based Credential Hardening Systems

    NASA Astrophysics Data System (ADS)

    Bartlow, Nick; Cukic, Bojan

    abstract Keystroke dynamics are becoming a well-known method for strengthening username- and password-based credential sets. The familiarity and ease of use of these traditional authentication schemes combined with the increased trustworthiness associated with biometrics makes them prime candidates for application in many web-based scenarios. Our keystroke dynamics system uses Breiman’s random forests algorithm to classify keystroke input sequences as genuine or imposter. The system is capable of operating at various points on a traditional ROC curve depending on application-specific security needs. As a username/password authentication scheme, our approach decreases the system penetration rate associated with compromised passwords up to 99.15%. Beyond presenting results demonstrating the credential hardening effect of our scheme, we look into the notion that a user’s familiarity to components of a credential set can non-trivially impact error rates.

  15. Vision Based SLAM in Dynamic Scenes

    DTIC Science & Technology

    2012-12-20

    cameras , while conventional studies are limited with a single camera (or a multi- camera rig where the relative positions between cameras are fixed...Our flexible configuration of cameras makes this algorithm applicable to robot teams, which also makes this study the world’s first vision based SLAM...algorithm for robot teams. Furthermore, the collaboration among multiple cameras allows us to deal with challenging dynamic scenes which make most

  16. Smart environment as a service: three factor cloud based user authentication for telecare medical information system.

    PubMed

    Siddiqui, Zeeshan; Abdullah, Abdul Hanan; Khan, Muhammad Khurram; Alghamdi, Abdullah S

    2014-01-01

    The Telecare Medical Information System (TMIS) provides a set of different medical services to the patient and medical practitioner. The patients and medical practitioners can easily connect to the services remotely from their own premises. There are several studies carried out to enhance and authenticate smartcard-based remote user authentication protocols for TMIS system. In this article, we propose a set of enhanced and authentic Three Factor (3FA) remote user authentication protocols utilizing a smartphone capability over a dynamic Cloud Computing (CC) environment. A user can access the TMIS services presented in the form of CC services using his smart device e.g. smartphone. Our framework transforms a smartphone to act as a unique and only identity required to access the TMIS system remotely. Methods, Protocols and Authentication techniques are proposed followed by security analysis and a performance analysis with the two recent authentication protocols proposed for the healthcare TMIS system.

  17. Plant-trait-based modeling assessment of ecosystem-service sensitivity to land-use change.

    PubMed

    Quétier, Fabien; Lavorel, Sandra; Thuiller, Wilfried; Davies, Ian

    2007-12-01

    Evidence is accumulating that the continued provision of essential ecosystem services is vulnerable to land-use change. Yet, we lack a strong scientific basis for this vulnerability as the processes that drive ecosystem-service delivery often remain unclear. In this paper, we use plant traits to assess ecosystem-service sensitivity to land-use change in subalpine grasslands. We use a trait-based plant classification (plant functional types, PFTs) in a landscape modeling platform to model community dynamics under contrasting but internally consistent land-use change scenarios. We then use predictive models of relevant ecosystem attributes, based on quantitative plant traits, to make projections of ecosystem-service delivery. We show that plant traits and PFTs are effective predictors of relevant ecosystem attributes for a range of ecosystem services including provisioning (fodder), cultural (land stewardship), regulating (landslide and avalanche risk), and supporting services (plant diversity). By analyzing the relative effects of the physical environment and land use on relevant ecosystem attributes, we also show that these ecosystem services are most sensitive to changes in grassland management, supporting current agri-environmental policies aimed at maintaining mowing of subalpine grasslands in Europe.

  18. Cloud-based hospital information system as a service for grassroots healthcare institutions.

    PubMed

    Yao, Qin; Han, Xiong; Ma, Xi-Kun; Xue, Yi-Feng; Chen, Yi-Jun; Li, Jing-Song

    2014-09-01

    Grassroots healthcare institutions (GHIs) are the smallest administrative levels of medical institutions, where most patients access health services. The latest report from the National Bureau of Statistics of China showed that 96.04 % of 950,297 medical institutions in China were at the grassroots level in 2012, including county-level hospitals, township central hospitals, community health service centers, and rural clinics. In developing countries, these institutions are facing challenges involving a shortage of funds and talent, inconsistent medical standards, inefficient information sharing, and difficulties in management during the adoption of health information technologies (HIT). Because of the necessity and gravity for GHIs, our aim is to provide hospital information services for GHIs using Cloud computing technologies and service modes. In this medical scenario, the computing resources are pooled by means of a Cloud-based Virtual Desktop Infrastructure (VDI) to serve multiple GHIs, with different hospital information systems dynamically assigned and reassigned according to demand. This paper is concerned with establishing a Cloud-based Hospital Information Service Center to provide hospital information software as a service (HI-SaaS) with the aim of providing GHIs with an attractive and high-performance medical information service. Compared with individually establishing all hospital information systems, this approach is more cost-effective and affordable for GHIs and does not compromise HIT performance.

  19. GEO Label Web Services for Dynamic and Effective Communication of Geospatial Metadata Quality

    NASA Astrophysics Data System (ADS)

    Lush, Victoria; Nüst, Daniel; Bastin, Lucy; Masó, Joan; Lumsden, Jo

    2014-05-01

    We present demonstrations of the GEO label Web services and their integration into a prototype extension of the GEOSS portal (http://scgeoviqua.sapienzaconsulting.com/web/guest/geo_home), the GMU portal (http://gis.csiss.gmu.edu/GADMFS/) and a GeoNetwork catalog application (http://uncertdata.aston.ac.uk:8080/geonetwork/srv/eng/main.home). The GEO label is designed to communicate, and facilitate interrogation of, geospatial quality information with a view to supporting efficient and effective dataset selection on the basis of quality, trustworthiness and fitness for use. The GEO label which we propose was developed and evaluated according to a user-centred design (UCD) approach in order to maximise the likelihood of user acceptance once deployed. The resulting label is dynamically generated from producer metadata in ISO or FDGC format, and incorporates user feedback on dataset usage, ratings and discovered issues, in order to supply a highly informative summary of metadata completeness and quality. The label was easily incorporated into a community portal as part of the GEO Architecture Implementation Programme (AIP-6) and has been successfully integrated into a prototype extension of the GEOSS portal, as well as the popular metadata catalog and editor, GeoNetwork. The design of the GEO label was based on 4 user studies conducted to: (1) elicit initial user requirements; (2) investigate initial user views on the concept of a GEO label and its potential role; (3) evaluate prototype label visualizations; and (4) evaluate and validate physical GEO label prototypes. The results of these studies indicated that users and producers support the concept of a label with drill-down interrogation facility, combining eight geospatial data informational aspects, namely: producer profile, producer comments, lineage information, standards compliance, quality information, user feedback, expert reviews, and citations information. These are delivered as eight facets of a wheel

  20. Impact of bioenergy production on ecosystem dynamics and services-a case study on U.K. Heathlands.

    PubMed

    Martinez-Hernandez, Elias; Leach, Matthew; Yang, Aidong

    2015-05-05

    For sustainability's sake, the establishment of bioenergy production can no longer overlook the interactions between ecosystem and technological processes, to ensure the preservation of ecosystem functions that provide energy and other goods and services to the human being. In this paper, a bioenergy production system based on heathland biomass is investigated with the aim to explore how a system dynamics approach can help to analyze the impact of bioenergy production on ecosystem dynamics and services and vice versa. The effect of biomass harvesting on the heathland dynamics, ecosystem services such as biomass production and carbon capture, and its capacity to balance nitrogen inputs from atmospheric deposition and nitrogen recycling were analyzed. Harvesting was found to be beneficial for the maintenance of the heathland ecosystem if the biomass cut fraction is higher than 0.2 but lower than 0.6, but this will depend on the specific conditions of nitrogen deposition and nitrogen recycling. With 95% recycling of nitrogen, biomass production was increased by up to 25% for a cut fraction of 0.4, but at the expense of higher nitrogen accumulation and the system being less capable to withstand high atmospheric nitrogen deposition.

  1. Prototype of a Mobile Social Network for Education Using Dynamic Web Service

    ERIC Educational Resources Information Center

    Hoentsch, Sandra Costa Pinto; Carvalho, Felipe Oliveira; Santos, Luiz Marcus Monteiro de Almeida; Ribeiro, Admilson de Ribamar Lima

    2012-01-01

    This article presents the proposal of a social network site SocialNetLab that belongs to the Department of Computing-Federal University of Sergipe and which aims to locate and notify users of a nearby friend independently of the location technology available in the equipment through dynamic Web Service; to serve as a laboratory for research in…

  2. Family Based Services: A Solution-Focused Approach.

    ERIC Educational Resources Information Center

    Berg, Insoo Kim

    Drawing on the field of family therapy, this step-by-step guide applies principles of brief, solution-focused therapy to family-based services (FBS) in ways that empower clients, increase cooperation, and aid the survival of social workers. Based on the author's experience at the Brief Family Therapy Center in Milwaukee, Wisconsin, the book is…

  3. A Different Web-Based Geocoding Service Using Fuzzy Techniques

    NASA Astrophysics Data System (ADS)

    Pahlavani, P.; Abbaspour, R. A.; Zare Zadiny, A.

    2015-12-01

    Geocoding - the process of finding position based on descriptive data such as address or postal code - is considered as one of the most commonly used spatial analyses. Many online map providers such as Google Maps, Bing Maps and Yahoo Maps present geocoding as one of their basic capabilities. Despite the diversity of geocoding services, users usually face some limitations when they use available online geocoding services. In existing geocoding services, proximity and nearness concept is not modelled appropriately as well as these services search address only by address matching based on descriptive data. In addition there are also some limitations in display searching results. Resolving these limitations can enhance efficiency of the existing geocoding services. This paper proposes the idea of integrating fuzzy technique with geocoding process to resolve these limitations. In order to implement the proposed method, a web-based system is designed. In proposed method, nearness to places is defined by fuzzy membership functions and multiple fuzzy distance maps are created. Then these fuzzy distance maps are integrated using fuzzy overlay technique for obtain the results. Proposed methods provides different capabilities for users such as ability to search multi-part addresses, searching places based on their location, non-point representation of results as well as displaying search results based on their priority.

  4. Back to the Future: From Service Learning to Strategic, Academically-Based Community Service.

    ERIC Educational Resources Information Center

    Harkavy, Ira

    1996-01-01

    Strategic, academically based community service holds promise for creating the structural change needed to reduce deprivation and inhuman suffering found in urban areas. The early history of the modern urban university, particularly in the late 19th century, is an example and can provide a model for further development of this mission. (MSE)

  5. Adolescent health care: improving access by school-based service.

    PubMed

    Gonzales, C; Mulligan, D; Kaufman, A; Davis, S; Hunt, K; Kalishman, N; Wallerstein, N

    1985-10-01

    Participants in this discussion of the potential of school-based health care services for adolescents included family medicine physicians, school health coordinators, a school nurse, and a community worker. It was noted that health care for adolescents tends to be either inaccessible or underutilized, largely because of a lack of sensitivity to adolescent culture and values. An ideal service for adolescents would offer immediate services for crises, strict confidentiality, ready access to prescribed medications, a sliding-scale scheme, and a staff that is tolerant of divergent values and life-styles. School-based pilot adolescent clinics have been established by the University of New Mexico's Department of Family, Community, and Emergency Medicine to test the community-oriented health care model. On-site clinics provide urgent medical care, family planning, pregnancy testing, psychological counseling, alcohol and drug counseling, and classroom health education. Experience with these programs has demonstrated the necessity for an alliance among the health team and the school administration, parents, and students. Financial, ethical, and political factors can serve as constraints to school-based programs. In some cases, school administrators have been resistant to the provision of contraception to students on school grounds and parents have been unwilling to accept the adolescent's right to confidentiality. These problems in part stem from having 2 separate systems, each with its own values, orientation, and responsibilities, housed in 1 facility. In addition, there have been problems generating awareness of the school-based clinic among students. Health education theater groups, peer counseling, and student-run community services have been effective, however, in increasing student participation. It has been helpful to mold clinic services to meet the needs identified by teenagers themselves. There is an interest not only in curative services, but in services focused

  6. Models of Dynamic Relations Among Service Activities, System State and Service Quality on Computer and Network Systems

    DTIC Science & Technology

    2010-01-01

    service process in throughput, delay, and so on. Chen et al. [4] describe service quality requirements of various network applications for online services , e.g...relations among service activities, system state and service quality voice over IP, etc. Service quality requirements for those online services are

  7. Dynamics-based centrality for directed networks

    NASA Astrophysics Data System (ADS)

    Masuda, Naoki; Kori, Hiroshi

    2010-11-01

    Determining the relative importance of nodes in directed networks is important in, for example, ranking websites, publications, and sports teams, and for understanding signal flows in systems biology. A prevailing centrality measure in this respect is the PageRank. In this work, we focus on another class of centrality derived from the Laplacian of the network. We extend the Laplacian-based centrality, which has mainly been applied to strongly connected networks, to the case of general directed networks such that we can quantitatively compare arbitrary nodes. Toward this end, we adopt the idea used in the PageRank to introduce global connectivity between all the pairs of nodes with a certain strength. Numerical simulations are carried out on some networks. We also offer interpretations of the Laplacian-based centrality for general directed networks in terms of various dynamical and structural properties of networks. Importantly, the Laplacian-based centrality defined as the stationary density of the continuous-time random walk with random jumps is shown to be equivalent to the absorption probability of the random walk with sinks at each node but without random jumps. Similarly, the proposed centrality represents the importance of nodes in dynamics on the original network supplied with sinks but not with random jumps.

  8. Dynamic Digital Channelizer Based on Spectrum Sensing.

    PubMed

    Hu, Junpeng; Zuo, Zhen; Huang, Zhiping; Dong, Zhi

    2015-01-01

    The ability to efficiently channelize a received signal with dynamic sub-channel bandwidths is a key requirement of software defined radio (SDR) systems. The digital channelizer, which is used to split the received signal into a number of sub-channels, plays an important role in SDR systems. In this paper, a design of dynamic digital channelizer is presented. The proposed method is novel in that it employs a cosine modulated filter bank (CMFB) to divide the received signal into multiple frequency sub-bands and a spectrum sensing technique, which is mostly used in cognitive radio, is introduced to detect the presence of signal of each sub-band. The method of spectrum sensing is carried out based on the eigenvalues of covariance matrix of received signal. The ratio of maximum-minimum eigenvalue of each sub-band is vulnerable to noise fluctuation. This paper suggests an optimized method to calculate the ratio of maximum-minimum eigenvalue. The simulation results imply that the design of digital channelizer can effectively separate the received signal with dynamically changeable sub-channel signals.

  9. Architecture Design of Healthcare Software-as-a-Service Platform for Cloud-Based Clinical Decision Support Service

    PubMed Central

    Oh, Sungyoung; Cha, Jieun; Ji, Myungkyu; Kang, Hyekyung; Kim, Seok; Heo, Eunyoung; Han, Jong Soo; Kang, Hyunggoo; Chae, Hoseok; Hwang, Hee

    2015-01-01

    Objectives To design a cloud computing-based Healthcare Software-as-a-Service (SaaS) Platform (HSP) for delivering healthcare information services with low cost, high clinical value, and high usability. Methods We analyzed the architecture requirements of an HSP, including the interface, business services, cloud SaaS, quality attributes, privacy and security, and multi-lingual capacity. For cloud-based SaaS services, we focused on Clinical Decision Service (CDS) content services, basic functional services, and mobile services. Microsoft's Azure cloud computing for Infrastructure-as-a-Service (IaaS) and Platform-as-a-Service (PaaS) was used. Results The functional and software views of an HSP were designed in a layered architecture. External systems can be interfaced with the HSP using SOAP and REST/JSON. The multi-tenancy model of the HSP was designed as a shared database, with a separate schema for each tenant through a single application, although healthcare data can be physically located on a cloud or in a hospital, depending on regulations. The CDS services were categorized into rule-based services for medications, alert registration services, and knowledge services. Conclusions We expect that cloud-based HSPs will allow small and mid-sized hospitals, in addition to large-sized hospitals, to adopt information infrastructures and health information technology with low system operation and maintenance costs. PMID:25995962

  10. Optimization for Service Routes of Pallet Service Center Based on the Pallet Pool Mode

    PubMed Central

    He, Shiwei; Song, Rui

    2016-01-01

    Service routes optimization (SRO) of pallet service center should meet customers' demand firstly and then, through the reasonable method of lines organization, realize the shortest path of vehicle driving. The routes optimization of pallet service center is similar to the distribution problems of vehicle routing problem (VRP) and Chinese postman problem (CPP), but it has its own characteristics. Based on the relevant research results, the conditions of determining the number of vehicles, the one way of the route, the constraints of loading, and time windows are fully considered, and a chance constrained programming model with stochastic constraints is constructed taking the shortest path of all vehicles for a delivering (recycling) operation as an objective. For the characteristics of the model, a hybrid intelligent algorithm including stochastic simulation, neural network, and immune clonal algorithm is designed to solve the model. Finally, the validity and rationality of the optimization model and algorithm are verified by the case. PMID:27528865

  11. Optimization for Service Routes of Pallet Service Center Based on the Pallet Pool Mode.

    PubMed

    Zhou, Kang; He, Shiwei; Song, Rui

    2016-01-01

    Service routes optimization (SRO) of pallet service center should meet customers' demand firstly and then, through the reasonable method of lines organization, realize the shortest path of vehicle driving. The routes optimization of pallet service center is similar to the distribution problems of vehicle routing problem (VRP) and Chinese postman problem (CPP), but it has its own characteristics. Based on the relevant research results, the conditions of determining the number of vehicles, the one way of the route, the constraints of loading, and time windows are fully considered, and a chance constrained programming model with stochastic constraints is constructed taking the shortest path of all vehicles for a delivering (recycling) operation as an objective. For the characteristics of the model, a hybrid intelligent algorithm including stochastic simulation, neural network, and immune clonal algorithm is designed to solve the model. Finally, the validity and rationality of the optimization model and algorithm are verified by the case.

  12. Dynamic plasmapause model based on THEMIS measurements

    NASA Astrophysics Data System (ADS)

    Liu, W.; Liu, X.

    2015-12-01

    We will present a dynamic plasmapause location model established based on five years of THEMIS measurements from 2009 to 2013. In total, 5878 plasmapause crossing events are identified, sufficiently covering all 24 Magnetic Local Time (MLT) sectors. Based on this plasmapause crossing database, we investigate the correlations between plasmapause locations with solar wind parameters and geomagnetic indices. Input parameters for the best fits are obtained for different MLT sectors and finally we choose five input parameters to build a plasmapause location model, including five-minute-averaged SYM-H, AL and AU indices as well as hourly-averaged AE and Kp indices. An out-of-sample comparison on the evolution of the plasmapause is shown during April 2001 magnetic storm, demonstrating good agreement between model results and observations. Two major advantages are achieved by this model. First, this model provides plasmapause locations at 24 MLT sectors, still providing good consistency with observations. Second, this model is able to reproduce dynamic variations of plasmapause in the time scale as short as five minutes.

  13. Motion detection based on recurrent network dynamics

    PubMed Central

    Joukes, Jeroen; Hartmann, Till S.; Krekelberg, Bart

    2014-01-01

    The detection of visual motion requires temporal delays to compare current with earlier visual input. Models of motion detection assume that these delays reside in separate classes of slow and fast thalamic cells, or slow and fast synaptic transmission. We used a data-driven modeling approach to generate a model that instead uses recurrent network dynamics with a single, fixed temporal integration window to implement the velocity computation. This model successfully reproduced the temporal response dynamics of a population of motion sensitive neurons in macaque middle temporal area (MT) and its constituent parts matched many of the properties found in the motion processing pathway (e.g., Gabor-like receptive fields (RFs), simple and complex cells, spatially asymmetric excitation and inhibition). Reverse correlation analysis revealed that a simplified network based on first and second order space-time correlations of the recurrent model behaved much like a feedforward motion energy (ME) model. The feedforward model, however, failed to capture the full speed tuning and direction selectivity properties based on higher than second order space-time correlations typically found in MT. These findings support the idea that recurrent network connectivity can create temporal delays to compute velocity. Moreover, the model explains why the motion detection system often behaves like a feedforward ME network, even though the anatomical evidence strongly suggests that this network should be dominated by recurrent feedback. PMID:25565992

  14. Dynamic graph cut based segmentation of mammogram.

    PubMed

    Angayarkanni, S Pitchumani; Kamal, Nadira Banu; Thangaiya, Ranjit Jeba

    2015-01-01

    This work presents the dynamic graph cut based Otsu's method to segment the masses in mammogram images. Major concern that threatens human life is cancer. Breast cancer is the most common type of disease among women in India and abroad. Breast cancer increases the mortality rate in India especially in women since it is considered to be the second largest form of disease which leads to death. Mammography is the best method for diagnosing early stage of cancer. The computer aided diagnosis lacks accuracy and it is time consuming. The main approach which makes the detection of cancerous masses accurate is segmentation process. This paper is a presentation of the dynamic graph cut based approach for effective segmentation of region of interest (ROI). The sensitivity, the specificity, the positive prediction value and the negative prediction value of the proposed algorithm are determined and compared with the existing algorithms. Both qualitative and quantitative methods are used to detect the accuracy of the proposed system. The sensitivity, the specificity, the positive prediction value and the negative prediction value of the proposed algorithm accounts to 98.88, 98.89, 93 and 97.5% which rates very high when compared to the existing algorithms.

  15. Dynamic bandwidth allocation by using efficient threshold reporting for quality of service in Ethernet passive optical networks

    NASA Astrophysics Data System (ADS)

    Yang, Yeon-Mo; Nho, Ji-Myong; Perros, Harry G.; Mahalik, N. P.; Kim, Kiseon; Ahn, Byung-Ha

    2006-03-01

    We present a dynamic bandwidth allocation scheme for Ethernet passive optical networks. This scheme, referred to as TDBA, is based on efficient threshold reporting and provides quality of service (QoS) to three different classes of packets. It is shown that network resources are efficiently allocated among the three traffic classes while guaranteeing the requested QoS by avoiding nearly all fragmentation losses. Simulation results using OPNET show that the TDBA scheme provides better packet delay and channel utilization than the other previously published allocation schemes.

  16. An Academic Library's Experience with Fee-Based Services.

    ERIC Educational Resources Information Center

    Hornbeck, Julia W.

    1983-01-01

    Profile of fee-based information services offered by the Information Exchange Center of Georgia Institute of Technology notes history and background, document delivery to commercial clients and on-campus faculty, online and manual literature searching, staff, cost analysis, fee schedule, operating methods, client relations, marketing, and current…

  17. The Uniframe Mobile Agent Based Resource Discovery Service

    DTIC Science & Technology

    2004-06-28

    ABSTRACT see report 15. SUBJECT TERMS 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT Same as Report (SAR) 18 . NUMBER OF PAGES 251...Prescribed by ANSI Std Z39- 18 THE UNIFRAME MOBILE AGENT BASED RESOURCE DISCOVERY SERVICE A Technical Report Report Number TR-CIS... 18 2.1.2.3 The UniFrame System Level Generative Programming Framework (USGPF

  18. Service Strategies for Higher Educational Institutions Based on Student Segmentation

    ERIC Educational Resources Information Center

    Ghosh, Amit K.; Javalgi, Rajshekhar; Whipple, Thomas W.

    2008-01-01

    Over the last decade, higher education institutions in the U.S. have faced increased competition and expenditures coupled with declines in financial support. Furthermore, they often have been forced to cater to the needs of an increasingly diverse group of students and must design service strategies based on the unique needs of each group. This…

  19. 106. Air defense command "master plan", base map," RCA Service ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    106. Air defense command "master plan", base map," RCA Service Company tab no. F-1, sheet 1 of 2, dated 22 October, 1965. - Clear Air Force Station, Ballistic Missile Early Warning System Site II, One mile west of mile marker 293.5 on Parks Highway, 5 miles southwest of Anderson, Anderson, Denali Borough, AK

  20. GIS In-Service Teacher Training Based on TPACK

    ERIC Educational Resources Information Center

    Hong, Jung Eun; Stonier, Francis

    2015-01-01

    This article introduces the geographic information systems (GIS) in-service teacher training, focusing on the intersection of technological, pedagogical, and content knowledge (TPACK) for successful implementation of GIS in the classroom. Eleven social studies teachers in Georgia learned GIS technologies, inquiry-based learning, and social studies…

  1. Competency Based Curriculum for Clothing Services and Production Sewing.

    ERIC Educational Resources Information Center

    Blake, Charlotte

    Designed to meet individual needs and learning levels of high school and postsecondary students enrolled in vocational training for occupations in clothing services and production sewing, this competency-based curriculum teaches skills in alterations, dressmaking, and power sewing machine operations. Skills are organized into 13 units: Awareness…

  2. 38 CFR 3.313 - Claims based on service in Vietnam.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... in Vietnam. 3.313 Section 3.313 Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF VETERANS... Evaluations; Service Connection § 3.313 Claims based on service in Vietnam. (a) Service in Vietnam. Service in Vietnam includes service in the waters offshore, or service in other locations if the conditions...

  3. A Home-Based Palliative Care Consult Service for Veterans.

    PubMed

    Golden, Adam G; Antoni, Charles; Gammonley, Denise

    2016-11-01

    We describe the development and implementation of a home-based palliative care consult service for Veterans with advanced illness. A retrospective chart review was performed on 73 Veterans who received a home-based palliative care consult. Nearly one-third were 80 years of age or older, and nearly one-third had a palliative diagnosis of cancer. The most common interventions of the consult team included discussion of advance directives, completion of a "do not resuscitate" form, reduction/stoppage of at least 1 medication, explanation of diagnosis, referral to home-based primary care program, referral to hospice, and assessment/support for caregiver stress. The home-based consult service was therefore able to address clinical and psychosocial issues that can demonstrate a direct benefit to Veterans, families, and referring clinicians.

  4. Telemedicine-Based Alcohol Services for Rural Offenders

    PubMed Central

    Staton-Tindall, Michele; Wahler, Elizabeth; Webster, J. Matthew; Godlaski, Theodore; Freeman, Rebecca; Leukefeld, Carl

    2016-01-01

    Research has consistently shown that alcohol use is a problem in rural communities and access to substance abuse treatment, particularly evidence-based treatment is limited. Because telemedicine has been shown to be effective in delivering services, this article presents a novel and innovative way of using telemedicine technology in the form of videoconferencing to deliver an evidence-based alcohol intervention (motivational enhancement therapy) with at-risk alcohol users in real-world settings (rural probation and parole offices). This article focuses on: (a) creating a profile of an at-risk group of rural alcohol users; (b) describing the evidence-based intervention; and (c) describing the innovative telemedicine-based service delivery approach. PMID:22867122

  5. Differentiated service in OBS networks using a dynamic FDL bank partitioning algorithm.

    PubMed

    Yonggyu, Lee; Kim, Namuk; Kim, Jaegwan; Ahn, Junseop; Kang, Minho

    2007-05-14

    In order to solve the differentiated service problem in optical burst switching (OBS) networks, we propose a dynamic fiber delay line (FDL) bank partitioning algorithm, which divides a FDL bank into several groups, using a feed-forward output buffering architecture. In the analysis, three classes and groups are considered for traffic and FDL, respectively, and each group is assigned to each class. This paper shows that the loss differentiation in OBS networks is easily accomplished in Poisson traffic environments when our dynamic algorithm is adopted.

  6. Shifting from Production to Service to Experience-Based Operations

    NASA Astrophysics Data System (ADS)

    Angelis, Jannis; de Lima, Edson Pinheiro

    This chapter covers the shift in focus of value added business operations from ­production to services, and in turn, to experience-based operations where customer involvement itself becomes part of the offering. The shift has significant implications for how businesses are managed. The greater service focus affects the firm's unique value proposition, which necessitates considerations on strategy, supplier relations, post-sale offerings and so on. Meanwhile, the inclusion of customer ­experiences affect the way operations are designed and employed so that these are structurally systematically captured and capitalised.

  7. SOAP-based services provided by the European Bioinformatics Institute

    PubMed Central

    Pillai, S.; Silventoinen, V.; Kallio, K.; Senger, M.; Sobhany, S.; Tate, J.; Velankar, S.; Golovin, A.; Henrick, K.; Rice, P.; Stoehr, P.; Lopez, R.

    2005-01-01

    SOAP (Simple Object Access Protocol) () based Web Services technology () has gained much attention as an open standard enabling interoperability among applications across heterogeneous architectures and different networks. The European Bioinformatics Institute (EBI) is using this technology to provide robust data retrieval and data analysis mechanisms to the scientific community and to enhance utilization of the biological resources it already provides [N. Harte, V. Silventoinen, E. Quevillon, S. Robinson, K. Kallio, X. Fustero, P. Patel, P. Jokinen and R. Lopez (2004) Nucleic Acids Res., 32, 3–9]. These services are available free to all users from . PMID:15980463

  8. Spatiotemporal-atlas-based dynamic speech imaging

    NASA Astrophysics Data System (ADS)

    Fu, Maojing; Woo, Jonghye; Liang, Zhi-Pei; Sutton, Bradley P.

    2016-03-01

    Dynamic magnetic resonance imaging (DS-MRI) has been recognized as a promising method for visualizing articulatory motion of speech in scientific research and clinical applications. However, characterization of the gestural and acoustical properties of the vocal tract remains a challenging task for DS-MRI because it requires: 1) reconstructing high-quality spatiotemporal images by incorporating stronger prior knowledge; and 2) quantitatively interpreting the reconstructed images that contain great motion variability. This work presents a novel imaging method that simultaneously meets both requirements by integrating a spatiotemporal atlas into a Partial Separability (PS) model-based imaging framework. Through the use of an atlas-driven sparsity constraint, this method is capable of capturing high-quality articulatory dynamics at an imaging speed of 102 frames per second and a spatial resolution of 2.2 × 2.2 mm2. Moreover, the proposed method enables quantitative characterization of variability of speech motion, compared to the generic motion pattern across all subjects, through the spatial residual components.

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

    NASA Astrophysics Data System (ADS)

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

    2010-04-01

    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.

  10. Trust and Privacy Solutions Based on Holistic Service Requirements

    PubMed Central

    Sánchez Alcón, José Antonio; López, Lourdes; Martínez, José-Fernán; Rubio Cifuentes, Gregorio

    2015-01-01

    The products and services designed for Smart Cities provide the necessary tools to improve the management of modern cities in a more efficient way. These tools need to gather citizens’ information about their activity, preferences, habits, etc. opening up the possibility of tracking them. Thus, privacy and security policies must be developed in order to satisfy and manage the legislative heterogeneity surrounding the services provided and comply with the laws of the country where they are provided. This paper presents one of the possible solutions to manage this heterogeneity, bearing in mind these types of networks, such as Wireless Sensor Networks, have important resource limitations. A knowledge and ontology management system is proposed to facilitate the collaboration between the business, legal and technological areas. This will ease the implementation of adequate specific security and privacy policies for a given service. All these security and privacy policies are based on the information provided by the deployed platforms and by expert system processing. PMID:26712752

  11. Trust and Privacy Solutions Based on Holistic Service Requirements.

    PubMed

    Sánchez Alcón, José Antonio; López, Lourdes; Martínez, José-Fernán; Rubio Cifuentes, Gregorio

    2015-12-24

    The products and services designed for Smart Cities provide the necessary tools to improve the management of modern cities in a more efficient way. These tools need to gather citizens' information about their activity, preferences, habits, etc. opening up the possibility of tracking them. Thus, privacy and security policies must be developed in order to satisfy and manage the legislative heterogeneity surrounding the services provided and comply with the laws of the country where they are provided. This paper presents one of the possible solutions to manage this heterogeneity, bearing in mind these types of networks, such as Wireless Sensor Networks, have important resource limitations. A knowledge and ontology management system is proposed to facilitate the collaboration between the business, legal and technological areas. This will ease the implementation of adequate specific security and privacy policies for a given service. All these security and privacy policies are based on the information provided by the deployed platforms and by expert system processing.

  12. Day Habilitation Services for People with Intellectual and Developmental Disabilities in Medicaid Home and Community-Based Services Waivers

    ERIC Educational Resources Information Center

    Friedman, Carli

    2016-01-01

    Medicaid Home and Community-Based Services (HCBS) 1915(c) waivers are one of the largest providers of long-term services and supports for people with intellectual and developmental disabilities (IDD). HCBS waivers also play a prominent role in providing day habilitation services for people with IDD. The purpose of this study was to examine how…

  13. Evidence-Based Services in a Statewide Public Mental Health System: Do the Services Fit the Problems?

    ERIC Educational Resources Information Center

    Schiffman, Jason; Becker, Kimberly D.; Daleiden, Eric L.

    2006-01-01

    This study examined the degree to which a literature review of evidence-based services identified services appropriate for the actual problems of youth involved in intensive public mental health services. The diagnostic profiles and specific intervention targets reported by treatment providers were coded to determine whether a relevant empirically…

  14. Content-based management service for medical videos.

    PubMed

    Mendi, Engin; Bayrak, Coskun; Cecen, Songul; Ermisoglu, Emre

    2013-01-01

    Development of health information technology has had a dramatic impact to improve the efficiency and quality of medical care. Developing interoperable health information systems for healthcare providers has the potential to improve the quality and equitability of patient-centered healthcare. In this article, we describe an automated content-based medical video analysis and management service that provides convenience and ease in accessing the relevant medical video content without sequential scanning. The system facilitates effective temporal video segmentation and content-based visual information retrieval that enable a more reliable understanding of medical video content. The system is implemented as a Web- and mobile-based service and has the potential to offer a knowledge-sharing platform for the purpose of efficient medical video content access.

  15. An u-Service Model Based on a Smart Phone for Urban Computing Environments

    NASA Astrophysics Data System (ADS)

    Cho, Yongyun; Yoe, Hyun

    In urban computing environments, all of services should be based on the interaction between humans and environments around them, which frequently and ordinarily in home and office. This paper propose an u-service model based on a smart phone for urban computing environments. The suggested service model includes a context-aware and personalized service scenario development environment that can instantly describe user's u-service demand or situation information with smart devices. To do this, the architecture of the suggested service model consists of a graphical service editing environment for smart devices, an u-service platform, and an infrastructure with sensors and WSN/USN. The graphic editor expresses contexts as execution conditions of a new service through a context model based on ontology. The service platform deals with the service scenario according to contexts. With the suggested service model, an user in urban computing environments can quickly and easily make u-service or new service using smart devices.

  16. A web service based tool to plan atmospheric research flights

    NASA Astrophysics Data System (ADS)

    Rautenhaus, M.; Bauer, G.; Dörnbrack, A.

    2011-09-01

    We present a web service based tool for the planning of atmospheric research flights. The tool provides online access to horizontal maps and vertical cross-sections of numerical weather prediction data and in particular allows the interactive design of a flight route in direct relation to the predictions. It thereby fills a crucial gap in the set of currently available tools for using data from numerical atmospheric models for research flight planning. A distinct feature of the tool is its lightweight, web service based architecture, requiring only commodity hardware and a basic Internet connection for deployment. Access to visualisations of prediction data is achieved by using an extended version of the Open Geospatial Consortium Web Map Service (WMS) standard, a technology that has gained increased attention in meteorology in recent years. With the WMS approach, we avoid the transfer of large forecast model output datasets while enabling on-demand generated visualisations of the predictions at campaign sites with limited Internet bandwidth. Usage of the Web Map Service standard also enables access to third-party sources of georeferenced data. We have implemented the software using the open-source programming language Python. In the present article, we describe the architecture of the tool. As an example application, we discuss a case study research flight planned for the scenario of the 2010 Eyjafjalla volcano eruption. Usage and implementation details are provided as Supplement.

  17. A web service based tool to plan atmospheric research flights

    NASA Astrophysics Data System (ADS)

    Rautenhaus, M.; Bauer, G.; Dörnbrack, A.

    2012-01-01

    We present a web service based tool for the planning of atmospheric research flights. The tool provides online access to horizontal maps and vertical cross-sections of numerical weather prediction data and in particular allows the interactive design of a flight route in direct relation to the predictions. It thereby fills a crucial gap in the set of currently available tools for using data from numerical atmospheric models for research flight planning. A distinct feature of the tool is its lightweight, web service based architecture, requiring only commodity hardware and a basic Internet connection for deployment. Access to visualisations of prediction data is achieved by using an extended version of the Open Geospatial Consortium Web Map Service (WMS) standard, a technology that has gained increased attention in meteorology in recent years. With the WMS approach, we avoid the transfer of large forecast model output datasets while enabling on-demand generated visualisations of the predictions at campaign sites with limited Internet bandwidth. Usage of the Web Map Service standard also enables access to third-party sources of georeferenced data. We have implemented the software using the open-source programming language Python. In the present article, we describe the architecture of the tool. As an example application, we discuss a case study research flight planned for the scenario of the 2010 Eyjafjalla volcano eruption. Usage and implementation details are provided as Supplement.

  18. Dynamic quality of service model for improving performance of multimedia real-time transmission in industrial networks.

    PubMed

    Gopalakrishnan, Ravichandran C; Karunakaran, Manivannan

    2014-01-01

    Nowadays, quality of service (QoS) is very popular in various research areas like distributed systems, multimedia real-time applications and networking. The requirements of these systems are to satisfy reliability, uptime, security constraints and throughput as well as application specific requirements. The real-time multimedia applications are commonly distributed over the network and meet various time constraints across networks without creating any intervention over control flows. In particular, video compressors make variable bit-rate streams that mismatch the constant-bit-rate channels typically provided by classical real-time protocols, severely reducing the efficiency of network utilization. Thus, it is necessary to enlarge the communication bandwidth to transfer the compressed multimedia streams using Flexible Time Triggered- Enhanced Switched Ethernet (FTT-ESE) protocol. FTT-ESE provides automation to calculate the compression level and change the bandwidth of the stream. This paper focuses on low-latency multimedia transmission over Ethernet with dynamic quality-of-service (QoS) management. This proposed framework deals with a dynamic QoS for multimedia transmission over Ethernet with FTT-ESE protocol. This paper also presents distinct QoS metrics based both on the image quality and network features. Some experiments with recorded and live video streams show the advantages of the proposed framework. To validate the solution we have designed and implemented a simulator based on the Matlab/Simulink, which is a tool to evaluate different network architecture using Simulink blocks.

  19. Dynamic Quality of Service Model for Improving Performance of Multimedia Real-Time Transmission in Industrial Networks

    PubMed Central

    Gopalakrishnan, Ravichandran C.; Karunakaran, Manivannan

    2014-01-01

    Nowadays, quality of service (QoS) is very popular in various research areas like distributed systems, multimedia real-time applications and networking. The requirements of these systems are to satisfy reliability, uptime, security constraints and throughput as well as application specific requirements. The real-time multimedia applications are commonly distributed over the network and meet various time constraints across networks without creating any intervention over control flows. In particular, video compressors make variable bit-rate streams that mismatch the constant-bit-rate channels typically provided by classical real-time protocols, severely reducing the efficiency of network utilization. Thus, it is necessary to enlarge the communication bandwidth to transfer the compressed multimedia streams using Flexible Time Triggered- Enhanced Switched Ethernet (FTT-ESE) protocol. FTT-ESE provides automation to calculate the compression level and change the bandwidth of the stream. This paper focuses on low-latency multimedia transmission over Ethernet with dynamic quality-of-service (QoS) management. This proposed framework deals with a dynamic QoS for multimedia transmission over Ethernet with FTT-ESE protocol. This paper also presents distinct QoS metrics based both on the image quality and network features. Some experiments with recorded and live video streams show the advantages of the proposed framework. To validate the solution we have designed and implemented a simulator based on the Matlab/Simulink, which is a tool to evaluate different network architecture using Simulink blocks. PMID:25170768

  20. Designing payments for ecosystem services: Lessons from previous experience with incentive-based mechanisms.

    PubMed

    Jack, B Kelsey; Kousky, Carolyn; Sims, Katharine R E

    2008-07-15

    Payments for ecosystem services (PES) policies compensate individuals or communities for undertaking actions that increase the provision of ecosystem services such as water purification, flood mitigation, or carbon sequestration. PES schemes rely on incentives to induce behavioral change and can thus be considered part of the broader class of incentive- or market-based mechanisms for environmental policy. By recognizing that PES programs are incentive-based, policymakers can draw on insights from the substantial body of accumulated knowledge about this class of instruments. In particular, this article offers a set of lessons about how the environmental, socioeconomic, political, and dynamic context of a PES policy is likely to interact with policy design to produce policy outcomes, including environmental effectiveness, cost-effectiveness, and poverty alleviation.

  1. Designing payments for ecosystem services: Lessons from previous experience with incentive-based mechanisms

    PubMed Central

    Jack, B. Kelsey; Kousky, Carolyn; Sims, Katharine R. E.

    2008-01-01

    Payments for ecosystem services (PES) policies compensate individuals or communities for undertaking actions that increase the provision of ecosystem services such as water purification, flood mitigation, or carbon sequestration. PES schemes rely on incentives to induce behavioral change and can thus be considered part of the broader class of incentive- or market-based mechanisms for environmental policy. By recognizing that PES programs are incentive-based, policymakers can draw on insights from the substantial body of accumulated knowledge about this class of instruments. In particular, this article offers a set of lessons about how the environmental, socioeconomic, political, and dynamic context of a PES policy is likely to interact with policy design to produce policy outcomes, including environmental effectiveness, cost-effectiveness, and poverty alleviation. PMID:18621696

  2. Dynamical quality of service (QoS) support for DOCSIS HFC networks

    NASA Astrophysics Data System (ADS)

    Kuo, Wen-Kuang; Kumar, Sunil; Kuo, C.-C. Jay

    2001-07-01

    The Data Over Cable Service Interface Specifications (DOCSIS) of the Multimedia Cable Network System (MCNS) organization intends to support IP traffics over HFC (hybrid fiber/coax) networks with significantly higher data rates than analog modems and Integrated Service Digital Network (ISDN) links. The availability of high speed-access enables the delivery of high quality audio, video and interactive services. To support quality-of-service (QoS) for such multimedia applications, it is important for HFC networks to provide effective medium access and traffic scheduling mechanisms. In this work, we consider an HFC network that has a shared upstream channel for transmissions from stations assigned with different service priorities to the headend. We first present a multilevel priority collision resolution scheme with adaptive contention window adjustment. The proposed collision resolution scheme separates and resolves collisions for different classes of critically delay-sensitive and best effort traffics, thereby, achieving the capability for preemptive priorities. To enhance the performance of the proposed scheme, we adopt a novel methodology in which the headend dynamically selects the optimal backoff window size according to the estimate of the number of contending stations for each priority class. A traffic scheduling policy with multiple priority queues is also employed in the headend to schedule data transmissions. This scheduling strategy is used to satisfy bandwidth requirements for higher priority traffics. Simulations are conducted by using OPNET. We present a set of simulation scenarios to demonstrate the performance efficiency of the proposed scheme.

  3. Secure password-based authenticated key exchange for web services

    SciTech Connect

    Liang, Fang; Meder, Samuel; Chevassut, Olivier; Siebenlist, Frank

    2004-11-22

    This paper discusses an implementation of an authenticated key-exchange method rendered on message primitives defined in the WS-Trust and WS-SecureConversation specifications. This IEEE-specified cryptographic method (AuthA) is proven-secure for password-based authentication and key exchange, while the WS-Trust and WS-Secure Conversation are emerging Web Services Security specifications that extend the WS-Security specification. A prototype of the presented protocol is integrated in the WSRF-compliant Globus Toolkit V4. Further hardening of the implementation is expected to result in a version that will be shipped with future Globus Toolkit releases. This could help to address the current unavailability of decent shared-secret-based authentication options in the Web Services and Grid world. Future work will be to integrate One-Time-Password (OTP) features in the authentication protocol.

  4. Spatial-Temporal dynamics of surface water flooding and consequences for emergency services accessibility

    NASA Astrophysics Data System (ADS)

    Pattison, Ian; Green, Daniel; Yu, Dapeng; Bosher, Lee; Wilby, Rob; Yang, Lili; Ryley, Tim

    2016-04-01

    Urban areas are increasingly susceptible to surface water flooding, with more intense precipitation and intensification of land development. Flooding has both direct impacts i.e. locations inundated with water, and indirect impacts i.e. transport networks, utility e.g. electricity/water services etc. The direct areas flooded evolve in space through the event, and are predicted by standard inundation models. However, the wider indirect impacts and the spatial-temporal patterns are less constrained and it is these that are needed to manage the impacts in real-time. This paper focusses on the Category One responders of the Fire and Rescue and Ambulance Services in the City of Leicester, East Midlands, UK. Leicester is ranked 16th out of 4215 settlements at risk of surface water flooding in the UK based upon the population at risk (15,200 people) (DEFRA, 2009). The analysis undertaken involved overlaying the flood extent with the Integrated Transport Network (ITN) data within a GIS framework. Then a simple transport routing algorithm was used to predict the travel time from specific nodes representing ambulance or fire stations to different parts of the city. Flood magnitudes with 1:20, 1:100 and 1:1000 return periods have been investigated. Under a scenario of no flooding, 100% of the city is accessible by the six fire stations in the city. However, in the 1 in 20 year surface water flood event the peak inundation results in 66.5% being accessible in the 10 minute permitted time and 6% is totally inaccessible. This falls to 40% and 13% respectively for the 1 in 100 year event. Maps show the area of the city that are accessible by two or more stations within the permitted response time, which shows these areas are the most resilient to surface water flooding. However, it isn't just the peak water depths at every location which impacts accessibility within the city but the spatial-temporal patterns of the inundation. The areas within the 10 minute response time expand

  5. Beyond Problem-Based Learning: Using Dynamic PBL in Chemistry

    ERIC Educational Resources Information Center

    Overton, Tina L.; Randles, Christopher A.

    2015-01-01

    This paper describes the development and implementation of a novel pedagogy, dynamic problem-based learning. The pedagogy utilises real-world problems that evolve throughout the problem-based learning activity and provide students with choice and different data sets. This new dynamic problem-based learning approach was utilised to teach…

  6. Decision support for vessel traffic service (VTS): user needs for dynamic risk management in the VTS.

    PubMed

    Praetorius, Gesa; Lützhöft, Margareta

    2012-01-01

    Vessel Traffic Service (VTS) is a shore-side service implemented by a "Competent Authority to improve the safety and efficiency of vessel traffic and to protect the environment". It is a service that operates through VTS centers, from which VTS operators monitor traffic, assist in navigational matters and provide information to all ships in a designated area. As VTS is provided by operators located on shore, they usually make use of several decision support systems to be able to monitor the traffic and to provide information to the vessels. Although several new tools and approaches have been introduced in the VTS domain, there is still room for improvements. This paper summarizes the results from three studies conducted within the EfficienSea project to approach user needs for dynamic risk management in the VTS domain. Data was collected by conducting study visits and observations at VTS centers, a focus group interview as well as several semi-structured interviews. The paper summarizes the results and presents technical and organizational user needs for dynamic risk management within the VTS domain.

  7. Primary oral health service provision in Aboriginal Medical Services-based dental clinics in Western Australia.

    PubMed

    Kruger, Estie; Perera, Irosha; Tennant, Marc

    2010-01-01

    Australians living in rural and remote areas have poorer access to dental care. This situation is attributed to workforce shortages, limited facilities and large distances to care centres. Against this backdrop, rural and remote Indigenous (Aboriginal) communities in Western Australia seem to be more disadvantaged because evidence suggests they have poorer oral health than non-Indigenous people. Hence, provision of dental care for Aboriginal populations in culturally appropriate settings in rural and remote Western Australia is an important public health issue. The aim of this research was to compare services between the Aboriginal Medical Services (AMS)-based clinics and a typical rural community clinic. A retrospective analysis of patient demographics and clinical treatment data was undertaken among patients who attended the dental clinics over a period of 6 years from 1999 to 2004. The majority of patients who received dental care at AMS dental clinics were Aboriginal (95.3%), compared with 8% at the non-AMS clinic. The rate of emergency at the non-AMS clinic was 33.5%, compared with 79.2% at the AMS clinics. The present study confirmed that more Indigenous patients were treated in AMS dental clinics and the mix of dental care provided was dominated by emergency care and oral surgery. This indicated a higher burden of oral disease and late utilisation of dental care services (more focus on tooth extraction) among rural and remote Indigenous people in Western Australia.

  8. Chapter 18: Web-based Tools - NED VO Services

    NASA Astrophysics Data System (ADS)

    Mazzarella, J. M.; NED Team

    The NASA/IPAC Extragalactic Database (NED) is a thematic, web-based research facility in widespread use by scientists, educators, space missions, and observatory operations for observation planning, data analysis, discovery, and publication of research about objects beyond our Milky Way galaxy. NED is a portal into a systematic fusion of data from hundreds of sky surveys and tens of thousands of research publications. The contents and services span the entire electromagnetic spectrum from gamma rays through radio frequencies, and are continuously updated to reflect the current literature and releases of large-scale sky survey catalogs. NED has been on the Internet since 1990, growing in content, automation and services with the evolution of information technology. NED is the world's largest database of crossidentified extragalactic objects. As of December 2006, the system contains approximately 10 million objects and 15 million multi-wavelength cross-IDs. Over 4 thousand catalogs and published lists covering the entire electromagnetic spectrum have had their objects cross-identified or associated, with fundamental data parameters federated for convenient queries and retrieval. This chapter describes the interoperability of NED services with other components of the Virtual Observatory (VO). Section 1 is a brief overview of the primary NED web services. Section 2 provides a tutorial for using NED services currently available through the NVO Registry. The "name resolver" provides VO portals and related internet services with celestial coordinates for objects specified by catalog identifier (name); any alias can be queried because this service is based on the source cross-IDs established by NED. All major services have been updated to provide output in VOTable (XML) format that can be accessed directly from the NED web interface or using the NVO registry. These include access to images via SIAP, Cone- Search queries, and services providing fundamental, multi

  9. A fully automated TerraSAR-X based flood service

    NASA Astrophysics Data System (ADS)

    Martinis, Sandro; Kersten, Jens; Twele, André

    2015-06-01

    In this paper, a fully automated processing chain for near real-time flood detection using high resolution TerraSAR-X Synthetic Aperture Radar (SAR) data is presented. The processing chain including SAR data pre-processing, computation and adaption of global auxiliary data, unsupervised initialization of the classification as well as post-classification refinement by using a fuzzy logic-based approach is automatically triggered after satellite data delivery. The dissemination of flood maps resulting from this service is performed through an online service which can be activated on-demand for emergency response purposes (i.e., when a flood situation evolves). The classification methodology is based on previous work of the authors but was substantially refined and extended for robustness and transferability to guarantee high classification accuracy under different environmental conditions and sensor configurations. With respect to accuracy and computational effort, experiments performed on a data set of 175 different TerraSAR-X scenes acquired during flooding all over the world with different sensor configurations confirm the robustness and effectiveness of the proposed flood mapping service. These promising results have been further confirmed by means of an in-depth validation performed for three study sites in Germany, Thailand, and Albania/Montenegro.

  10. Service-based extensions to the JDL fusion model

    NASA Astrophysics Data System (ADS)

    Antony, Richard T.; Karakowski, Joseph A.

    2008-04-01

    Extensions to a previously developed service-based fusion process model are presented. The model accommodates (1) traditional sensor data and human-generated input, (2) streaming and non-streaming data feeds, and (3) the fusion of both physical and non-physical entities. More than a dozen base-level fusion services are identified. These services provide the foundation functional decomposition of levels 0 - 2 in JDL fusion model. Concepts, such as clustering, link analysis and database mining, that have traditionally been only loosely associated with the fusion process, are shown to play key roles within this fusion framework. Additionally, the proposed formulation extends the concepts of tracking and cross-entity association to non-physical entities, as well as supports effective exploitation of a priori and derived context knowledge. Finally, the proposed framework is shown to support set theoretic properties, such as equivalence and transitivity, as well as the development of a pedigree summary metric that characterizes the informational distance between individual fused products and source data.

  11. Global polar geospatial information service retrieval based on search engine and ontology reasoning

    USGS Publications Warehouse

    Chen, Nengcheng; E, Dongcheng; Di, Liping; Gong, Jianya; Chen, Zeqiang

    2007-01-01

    In order to improve the access precision of polar geospatial information service on web, a new methodology for retrieving global spatial information services based on geospatial service search and ontology reasoning is proposed, the geospatial service search is implemented to find the coarse service from web, the ontology reasoning is designed to find the refined service from the coarse service. The proposed framework includes standardized distributed geospatial web services, a geospatial service search engine, an extended UDDI registry, and a multi-protocol geospatial information service client. Some key technologies addressed include service discovery based on search engine and service ontology modeling and reasoning in the Antarctic geospatial context. Finally, an Antarctica multi protocol OWS portal prototype based on the proposed methodology is introduced.

  12. Anonymity and Historical-Anonymity in Location-Based Services

    NASA Astrophysics Data System (ADS)

    Bettini, Claudio; Mascetti, Sergio; Wang, X. Sean; Freni, Dario; Jajodia, Sushil

    The problem of protecting user’s privacy in Location-Based Services (LBS) has been extensively studied recently and several defense techniques have been proposed. In this contribution, we first present a categorization of privacy attacks and related defenses. Then, we consider the class of defense techniques that aim at providing privacy through anonymity and in particular algorithms achieving “historical k- anonymity” in the case of the adversary obtaining a trace of requests recognized as being issued by the same (anonymous) user. Finally, we investigate the issues involved in the experimental evaluation of anonymity based defense techniques; we show that user movement simulations based on mostly random movements can lead to overestimate the privacy protection in some cases and to overprotective techniques in other cases. The above results are obtained by comparison to a more realistic simulation with an agent-based simulator, considering a specific deployment scenario.

  13. Considering Affective Responses towards Environments for Enhancing Location Based Services

    NASA Astrophysics Data System (ADS)

    Huang, H.; Gartner, G.; Klettner, S.; Schmidt, M.

    2014-04-01

    A number of studies in the field of environmental psychology show that humans perceive and evaluate their surroundings affectively. Some places are experienced as unsafe, while some others as attractive and interesting. Experiences from daily life show that many of our daily behaviours and decision-making are often influenced by this kind of affective responses towards environments. Location based services (LBS) are often designed to assist and support people's behaviours and decision-making in space. In order to provide services with high usefulness (usability and utility), LBS should consider these kinds of affective responses towards environments. This paper reports on the results of a research project, which studies how people's affective responses towards environments can be modelled and acquired, as well as how LBS can benefit by considering these affective responses. As one of the most popular LBS applications, mobile pedestrian navigation systems are used as an example for illustration.

  14. GEARS: An Enterprise Architecture Based On Common Ground Services

    NASA Astrophysics Data System (ADS)

    Petersen, S.

    2014-12-01

    Earth observation satellites collect a broad variety of data used in applications that range from weather forecasting to climate monitoring. Within NOAA the National Environmental Satellite Data and Information Service (NESDIS) supports these applications by operating satellites in both geosynchronous and polar orbits. Traditionally NESDIS has acquired and operated its satellites as stand-alone systems with their own command and control, mission management, processing, and distribution systems. As the volume, velocity, veracity, and variety of sensor data and products produced by these systems continues to increase, NESDIS is migrating to a new concept of operation in which it will operate and sustain the ground infrastructure as an integrated Enterprise. Based on a series of common ground services, the Ground Enterprise Architecture System (GEARS) approach promises greater agility, flexibility, and efficiency at reduced cost. This talk describes the new architecture and associated development activities, and presents the results of initial efforts to improve product processing and distribution.

  15. Characterization and Modeling of Segmental Dynamics in Silicone Based Nanocomposites

    SciTech Connect

    Maxwell, R S; Baumann, T; Gee, R; Maiti, A; Patel, M; Lewicki, J

    2009-03-27

    The addition of nano-particles with novel chemical, optical, or barrier properties further opens the door to the development of so-called multifunctional materials (1). Key to developing robust, tailored composites is a detailed understanding of the structural contributions to the engineering properties of the composite and how they may change with time in harsh service conditions. The segmental dynamics and local order underlie much of the fundamental physics that influence the performance of elastomers and can serve as important diagnostics for reinforcement and other fundamental properties (e.g., network topology, cross-link density, the number and distance between chemical and physical (entanglements) cross-links, the type and volume fraction of filler) and thus provide a route to this fundamental understanding. {sup 1}H MQ-NMR spectroscopy has shown the ability to provide more reliable and quantitative information regarding the elastomer network structure and heterogeneities (2). {sup 1}H MQ-NMR methods allow for the measurement of absolute residual dipolar couplings (<{Omega}{sub d}>) and thus the segmental/cooperative dynamics Thus, the MQ-NMR method allows for the direct measure of network topology and in many cases, filler-particle interactions. The ability of MD methods to uncover structural motifs and dynamics at the atomistic scale is well known. In polymer systems, however, the relationship to bulk material properties can be somewhat tenuous due to often limited number of atoms and short time durations that can be studied. Extending these MD simulations to large assemblies of atoms and extending them to longer times using state of the art computational resources has allowed us to probe some useful relationships. MD provides static and dynamic properties for a collection of particles that allow atomic scale insights that are difficult to gain otherwise. We have been exploiting these methods to characterize the effects of network structure and filler

  16. Toward a Framework for Dynamic Service Binding in E-Procurement

    NASA Astrophysics Data System (ADS)

    Ashoori, Maryam; Eze, Benjamin; Benyoucef, Morad; Peyton, Liam

    In an online environment, an E-Procurement process should be able to react and adapt in near real-time to changes in suppliers, requirements, and regulations. WS-BPEL is an emerging standard for process automation, but is oriented towards design-time binding of services. This missing issue can be resolved through designing an extension to WS-BPEL to support automation of flexible e-Procurement processes. Our proposed framework will support dynamic acquisition of procurement services from different suppliers dealing with changing procurement requirements. The proposed framework is illustrated by applying it to health care where different health insurance providers could be involved to procure the medication for patients.

  17. A dynamic case-based planning system for space station application

    NASA Technical Reports Server (NTRS)

    Oppacher, F.; Deugo, D.

    1988-01-01

    We are currently investigating the use of a case-based reasoning approach to develop a dynamic planning system. The dynamic planning system (DPS) is designed to perform resource management, i.e., to efficiently schedule tasks both with and without failed components. This approach deviates from related work on scheduling and on planning in AI in several aspects. In particular, an attempt is made to equip the planner with an ability to cope with a changing environment by dynamic replanning, to handle resource constraints and feedback, and to achieve some robustness and autonomy through plan learning by dynamic memory techniques. We briefly describe the proposed architecture of DPS and its four major components: the PLANNER, the plan EXECUTOR, the dynamic REPLANNER, and the plan EVALUATOR. The planner, which is implemented in Smalltalk, is being evaluated for use in connection with the Space Station Mobile Service System (MSS).

  18. Cloud based emergency health care information service in India.

    PubMed

    Karthikeyan, N; Sukanesh, R

    2012-12-01

    A hospital is a health care organization providing patient treatment by expert physicians, surgeons and equipments. A report from a health care accreditation group says that miscommunication between patients and health care providers is the reason for the gap in providing emergency medical care to people in need. In developing countries, illiteracy is the major key root for deaths resulting from uncertain diseases constituting a serious public health problem. Mentally affected, differently abled and unconscious patients can't communicate about their medical history to the medical practitioners. Also, Medical practitioners can't edit or view DICOM images instantly. Our aim is to provide palm vein pattern recognition based medical record retrieval system, using cloud computing for the above mentioned people. Distributed computing technology is coming in the new forms as Grid computing and Cloud computing. These new forms are assured to bring Information Technology (IT) as a service. In this paper, we have described how these new forms of distributed computing will be helpful for modern health care industries. Cloud Computing is germinating its benefit to industrial sectors especially in medical scenarios. In Cloud Computing, IT-related capabilities and resources are provided as services, via the distributed computing on-demand. This paper is concerned with sprouting software as a service (SaaS) by means of Cloud computing with an aim to bring emergency health care sector in an umbrella with physical secured patient records. In framing the emergency healthcare treatment, the crucial thing considered necessary to decide about patients is their previous health conduct records. Thus a ubiquitous access to appropriate records is essential. Palm vein pattern recognition promises a secured patient record access. Likewise our paper reveals an efficient means to view, edit or transfer the DICOM images instantly which was a challenging task for medical practitioners in the

  19. A web service based tool to plan atmospheric research flights

    NASA Astrophysics Data System (ADS)

    Rautenhaus, M.; Dörnbrack, A.

    2012-04-01

    We present a web service based tool for the planning of atmospheric research flights. The tool, which we call the "Mission Support System" (MSS), provides online access to horizontal maps and vertical cross-sections of numerical weather prediction data and in particular allows the interactive design of a flight route in direct relation to the predictions. It thereby fills a crucial gap in the set of currently available tools for using data from numerical atmospheric models for research flight planning. A distinct feature of the tool is its lightweight, web service based architecture, requiring only commodity hardware and a basic Internet connection for deployment. Access to visualisations of prediction data is achieved by using an extended version of the Open Geospatial Consortium Web Map Service (WMS) standard. With the WMS approach, we avoid the transfer of large forecast model output datasets while enabling on-demand generated visualisations of the predictions at campaign sites with limited Internet bandwidth. Usage of the Web Map Service standard also enables access to third-party sources of georeferenced data. The MSS is focused on the primary needs of mission scientists responsible for planning a research flight, addressing in particular the following requirements: (1) interactive exploration of available atmospheric forecasts, (2) interactive flight planning in relation to these forecasts, (3) computation of expected flight performance to assess the technical feasibility (in terms of total distance and vertical profile) of a flight, (4) no transfer of large forecast data files to the campaign site to allow deployment at remote locations and (5) low demand on hardware resources. We have implemented the software using the open-source programming language Python.

  20. [Sociability networks: approaches based on home-based therapeutic care services].

    PubMed

    Argiles, Carmen Terezinha Leal; Kantorski, Luciane Prado; Willrich, Janaína Quinzen; Antonacci, Milena Hohmann; Coimbra, Valéria Cristina Christello

    2013-07-01

    Home-based therapeutic services emerge in the context of psychiatric reform in Brazil, as a step forward in the policy of de-institutionalization, as well as being essential services to overcome custody practices, typical of the asylum model. These services provide spaces for care, welcome and decent housing for people whose family and social ties have been affected by internment in psychiatric hospitals. The article seeks to evaluate the sociability network of users of home-based therapeutic services in Alegrete in the State of Rio Grande do Sul, based on a case report. This study is part of the research on 'Networks that Rehabilitate'--evaluating innovative experiments in the composition of psychosocial care networks. Data from semi-structured interviews with the six workers of the service were used. It was observed that the service provides unique and innovative experience to find solutions that bring people with long periods of psychiatric hospitalization back together with their family, the community and city life, thereby eliminating the segregation to which they were subjected. Coaching residents and workers in the creation of home-based therapeutic care services reveals the potential to reintegrate mentally handicapped patients into society.

  1. Standards-Based, Web Services for Interoperable Geosciences Data Systems

    NASA Astrophysics Data System (ADS)

    Domenico, B.; Nativi, S.; Bigagli, L.; Caron, J.

    2005-12-01

    Disparate, "stove-pipe" data systems are among the main impediments to many interdisciplinary research projects in the geosciences. The solid earth disciplines and hydrology tend to use Geographic Information Systems (GIS) which enable them to store and interact with data representing as discrete features on or near the surface of the earth. Studies of the oceans and atmosphere on the other hand involve systems that represent data as discrete points in the continuous function space of fluid dynamics. Attempts to understand the nature of severe precipitation and flooding events are hampered by the difficulty of integrating data such as streamflows from hydrological data systems with radar data and precipitation forecasts from atmospheric science data systems. An effort is underway to address some of these issues with an interoperability experiment within the framework of the Open Geospatial Consortium (OGC). The experiment is called GALEON (Geo-interface to Atmosphere, Land, Earth, Ocean NetCDF). Teams at the Unidata Program Center and University of Florence are working with a number of international partners to implement a web services interface to traditional atmospheric and oceanographic datasets currently stored in netCDF form or served via the OPeNDAP protocol . The project will result in a gateway service using Web Coverage Service (WCS) specification of the OGC. Underneath the WCS interface will be a combination of technologies including THREDDS (THematic Real-time Environmental Distributed Data Services) and HDF5 (Heirarchical Data Format) in addition to netCDF and OPeNDAP. A key component of the project is to develop mechanisms for explicit encoding of coordinate system information in the form of Coordinate System extensions to NcML (the netCDF Markup Language), directly in the data files themselves and in the form of GML (Geography Markup Language) extensions to NcML. These extensions, called NcML-GML, include a subset profile of the standard GML which is

  2. Developing network-based services in the NHS.

    PubMed

    Conner, M

    2001-01-01

    Networks, based upon informal relationships, have ensured that care was delivered to patients for many years. This informal organisation of care, based upon personal relationships, ensures that where the bureaucratic organisation fails the patient, health professionals' work together to network the resources the patient needs. Networks are not new. Formalising networks and recognising their potential to deliver seamless care is new. The NHS must ensure that networks are developed, allowing them freedom from bureaucracy to reach their potential. The Northern and Yorkshire Learning Alliance (NYLA) was established as part of the Northern and Yorkshire health community's efforts to radically improve care. The NYLA operates as a network with a small team of change experts working to develop change management and service improvement capacity across 10,000 square miles. As a network based organisation the team has learned many lessons, which may inform the development of clinical networks in England.

  3. Oceanic satellite data service system based on web

    NASA Astrophysics Data System (ADS)

    Kang, Yan; Pan, Delu; He, Xianqiang; Wang, Difeng; Chen, Jianyu; Chen, Xiaoyan

    2011-11-01

    The ocean satellite observation is more and more important to study the global change, protect ocean resource and implement ocean engineering for their large area cover and high frequency observation, which have already given us a global view of ocean environment parameters, including the sea surface temperature, ocean color, wind, wave, sea level and sea ice, etc... China has made great progress in ocean environment remote sensing over the last couple of years. These data are widely used for a variety of applications in ocean environment studies, coastal water quality monitoring environmental, fishery resources protection, development and utilization of fishery resources, coastal engineering and oceanography. But the data are no online information access and dissemination, no online visualization & browsing, no online query and analyze capability. To facilitate the application of the data and to help disseminating the data, a web-service system has developed. The system provides capabilities of online oceanic satellite information access, query, visualize and analyze. It disseminates oceanic satellite data to the users via real time retrieval, processing and publishing through standards-based geospatial web services. A region of interest can also be exported directly to Google Earth for displaying or downloaded. This web service system greatly improves accessibility, interoperability, usability, and visualization of oceanic satellite data without any client-side software installation.

  4. Hubble Space Telescope servicing - Experience base for a new era

    NASA Technical Reports Server (NTRS)

    Welch, James C.; Brown, William W.

    1987-01-01

    An account is given of the conceptual evolution of the Hubble Space Telescope's (HST) maintenance methodology, and the belated recognition of its long-term support requirements, as well as measures conceived for the extension of this orbiting observatory's service life, and the prospective benefits derivable by comparable programs from HST experience. Attention is given to HST cost and capability tradeoffs, the maintenance concept's definition, the integrated logistic support planning instituted by the program and its failure-prediction methods, as well as the institutional support base employed.

  5. MIPS: a service-based aid for intelligence analysis

    NASA Astrophysics Data System (ADS)

    Braines, David; Ibbotson, John; White, Graham

    2013-05-01

    The Management of Information Processing Services (MIPS) project has two main objectives; the notification to analysts of the arrival of relevant new information and the automatic processing of the new information. Within these objectives a number of significant challenges were addressed. To achieve the first objective, the team had to demonstrate the capability for specific analysts to be "tipped-off" in real-time that textual reports and sensor-data have been received that are relevant to their analytical tasks, including the possibility that such reports have been made available by other nations. In the case of the second objective, the team had to demonstrate the capability for the infrastructure to automatically initiate processing of input data as it arrives, consistent with satisfying the analytical goals of teams of analysts, in as an efficient a manner as possible (including the case where data is made available by more than one nation). Using the Information Fabric middleware developed as part of the International Technology Alliance (ITA) research program, the team created a service based information processing infrastructure to achieve the objectives and challenges set by the customer. The infrastructure allows existing software to be wrapped as a service and/or specially written services to be integrated with each other as well as with other ITA technologies such as the Controlled English (CE) Store or the Gaian Database. This paper will identify the difficulties in designing and implementing the MIPS infrastructure together with describing its architecture and illustrating its use with a worked example use case.

  6. Dynamic Monitoring of Energy Services in Conflict Regions using Suomi-NPP VIIRS

    NASA Astrophysics Data System (ADS)

    Stokes, E.; Roman, M. O.

    2015-12-01

    While remote sensing data has proven useful for understanding the environmental conditions surrounding conflict, it can also present a more nuanced, dynamic picture inside conflict zones. This study investigates the use of global nighttime environmental products as derived from the Suomi-NPP satellite's Visible Infrared Imaging Radiometer Suite (VIIRS) to identify and track the location and timing of regional conflicts in the Middle East as reflected in changes to the region's energy infrastructure. The study focuses on a 43-month period (c. Jan 2012 - Aug 2015) over major urban centers in Iraq, Syria, Egypt, and Lebanon. The new daily dynamic products captured a series of striking downturns in energy service supply and demand that occurred in 2012 in the Syrian cities of Damascus (-50%) and Aleppo (-94%) corresponding to the onset of major military confrontations (The Battle of Aleppo on 7/15/2012 and The Damascus Bombing on 7/23/2012, respectively). Iraqi cities recently captured by the Islamic State of Iraq and the Levant (ISIL) (e.g. Mosul, Tikrit, Tal Afor, Ramadi), also showed marked average decreases in energy service provision (-84% since 4/1/2014) compared to their unoccupied counterparts (e.g., Baghdad and Sulaimaniya at +6%). A seasonal trend decomposition analysis is used to disentangle climactic, social, and political factors affecting the VIIRS time-series, distinguishing between energy patterns associated with conflict and those associated with cultural festivals, load shedding, seasonal weather, and socioeconomic factors.

  7. "Learning Service" in International Contexts: Partnership-Based Service-Learning and Research in Cape Town, South Africa

    ERIC Educational Resources Information Center

    McMillan, Janice; Stanton, Timothy K.

    2014-01-01

    In this paper we explore an approach to developing and implementing service-learning and community-based research in a study-abroad program in Cape Town, South Africa. Drawing on a notion of partnerships reflecting the values of accompaniment and transparency, and influenced by the importance of learning service, we outline an intentional, engaged…

  8. Service quality and perceived value of technology-based service encounters: evaluation of clinical staff satisfaction in Taiwan.

    PubMed

    Hung, Chung-Jye; Chang, Hsin Hsin; Eng, Cheng Joo; Wong, Kit Hong

    2013-01-01

    Previous research has evaluated technology-based service encounters (TBSEs) in the delivery of health care by assessing patient satisfaction. This study examined service quality and perceived value of TBSEs used in health organisations from the perspective of clinical staff, with staff technology readiness as a moderator. A quantitative survey was conducted in Taiwan, across private and public healthcare organisations. Results showed that TBSEs had a direct effect on service quality and perceived value, which in turn had a direct effect on staff satisfaction in using TBSEs. However, service quality had no effect on perceived value when moderated by technology readiness. Theoretical and managerial implications of these findings are discussed.

  9. Remote information service access system based on a client-server-service model

    DOEpatents

    Konrad, A.M.

    1997-12-09

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user`s local host, thereby providing ease of use and minimal software maintenance for users of that remote service. 16 figs.

  10. Remote information service access system based on a client-server-service model

    DOEpatents

    Konrad, A.M.

    1996-08-06

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user`s local host, thereby providing ease of use and minimal software maintenance for users of that remote service. 16 figs.

  11. Remote information service access system based on a client-server-service model

    DOEpatents

    Konrad, Allan M.

    1997-01-01

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

  12. Remote information service access system based on a client-server-service model

    DOEpatents

    Konrad, Allan M.

    1999-01-01

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

  13. Remote information service access system based on a client-server-service model

    DOEpatents

    Konrad, Allan M.

    1996-01-01

    A local host computing system, a remote host computing system as connected by a network, and service functionalities: a human interface service functionality, a starter service functionality, and a desired utility service functionality, and a Client-Server-Service (CSS) model is imposed on each service functionality. In one embodiment, this results in nine logical components and three physical components (a local host, a remote host, and an intervening network), where two of the logical components are integrated into one Remote Object Client component, and that Remote Object Client component and the other seven logical components are deployed among the local host and remote host in a manner which eases compatibility and upgrade problems, and provides an illusion to a user that a desired utility service supported on a remote host resides locally on the user's local host, thereby providing ease of use and minimal software maintenance for users of that remote service.

  14. 48 CFR 652.228-71 - Worker's Compensation Insurance (Defense Base Act)-Services.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Insurance (Defense Base Act)-Services. 652.228-71 Section 652.228-71 Federal Acquisition Regulations System... Clauses 652.228-71 Worker's Compensation Insurance (Defense Base Act)—Services. As prescribed in 628.309-70(b), insert the following clause: Workers' Compensation Insurance (Defense Base Act)—Services...

  15. 48 CFR 652.228-71 - Worker's Compensation Insurance (Defense Base Act)-Services.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Insurance (Defense Base Act)-Services. 652.228-71 Section 652.228-71 Federal Acquisition Regulations System... Clauses 652.228-71 Worker's Compensation Insurance (Defense Base Act)—Services. As prescribed in 628.309-70(b), insert the following clause: Workers' Compensation Insurance (Defense Base Act)—Services...

  16. 48 CFR 652.228-71 - Worker's Compensation Insurance (Defense Base Act)-Services.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Insurance (Defense Base Act)-Services. 652.228-71 Section 652.228-71 Federal Acquisition Regulations System... Clauses 652.228-71 Worker's Compensation Insurance (Defense Base Act)—Services. As prescribed in 628.309-70(b), insert the following clause: Workers' Compensation Insurance (Defense Base Act)—Services...

  17. 48 CFR 652.228-71 - Worker's Compensation Insurance (Defense Base Act)-Services.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Insurance (Defense Base Act)-Services. 652.228-71 Section 652.228-71 Federal Acquisition Regulations System... Clauses 652.228-71 Worker's Compensation Insurance (Defense Base Act)—Services. As prescribed in 628.309-70(b), insert the following clause: Workers' Compensation Insurance (Defense Base Act)—Services...

  18. Chemical Abstracts Service approach to management of large data bases.

    PubMed

    Huffenberger, M A; Wigington, R L

    1975-02-01

    When information handling is "the business," as it is at Chemical Abstract Service (CAS), the total organization must be involved in information management. Since 1967, when, as a result of long-range planning efforts, CAS adopted a "data-base approach" to management of both the processing system and the distribution of information files, CAS has been grappling with the problems of managing large collections of information in computer-based systems. This paper describes what has been done at CAS in the management of large files and what we see as necessary, as a result of our experience, to improve and complete the information management system that is the foundation of our production processes.

  19. Web based aphasia test using service oriented architecture (SOA)

    NASA Astrophysics Data System (ADS)

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

    2007-11-01

    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.

  20. Southwest Ecosystem Services Project (SwESP): Identifying Ecosystems Services Based on Tribal Values

    EPA Science Inventory

    USEPA Office of Research Development (ORD) new strategic focus is the measurement of benefits and services of ecosystem. The primary objective of the Ecosystem Services Research Program (ESRP) is to identify, measure, monitor, model and map ecosystem services and to enable their ...

  1. Dynamic Programming Based Segmentation in Biomedical Imaging.

    PubMed

    Ungru, Kathrin; Jiang, Xiaoyi

    2017-01-01

    Many applications in biomedical imaging have a demand on automatic detection of lines, contours, or boundaries of bones, organs, vessels, and cells. Aim is to support expert decisions in interactive applications or to include it as part of a processing pipeline for automatic image analysis. Biomedical images often suffer from noisy data and fuzzy edges. Therefore, there is a need for robust methods for contour and line detection. Dynamic programming is a popular technique that satisfies these requirements in many ways. This work gives a brief overview over approaches and applications that utilize dynamic programming to solve problems in the challenging field of biomedical imaging.

  2. A robust and novel dynamic-ID-based authentication scheme for care team collaboration with smart cards.

    PubMed

    Chang, Ya-Fen; Chen, Chia-Chen; Chang, Pei-Yu

    2013-04-01

    Nowadays, users/patients may gain desired medical services on-line because of the rapid development of computer network technologies. Conventional healthcare services are provided by a single server. However, care team collaboration by integrating services is the key to improve financial and clinical performance. How a user/patient accesses desired medical services provided by multiple servers becomes a challenge to realize care team collaboration. User authentication plays an important role to protect resources or services from being accessed by unauthorized users. In this paper, we first discuss the perceived security drawbacks of pervasive smart-card-based remote user authentication schemes. Then, we propose a novel dynamic-ID-based user authentication scheme based on elliptic curve cryptosystem (ECC) for multi-server environment with smart cards. The proposed scheme ensures user anonymity and computational efficiency and complies with essential requirements of a secure smart-card-based authentication scheme for multi-server environment to enable care team collaboration.

  3. Integrated earth system dynamic modeling for life cycle impact assessment of ecosystem services.

    PubMed

    Arbault, Damien; Rivière, Mylène; Rugani, Benedetto; Benetto, Enrico; Tiruta-Barna, Ligia

    2014-02-15

    Despite the increasing awareness of our dependence on Ecosystem Services (ES), Life Cycle Impact Assessment (LCIA) does not explicitly and fully assess the damages caused by human activities on ES generation. Recent improvements in LCIA focus on specific cause-effect chains, mainly related to land use changes, leading to Characterization Factors (CFs) at the midpoint assessment level. However, despite the complexity and temporal dynamics of ES, current LCIA approaches consider the environmental mechanisms underneath ES to be independent from each other and devoid of dynamic character, leading to constant CFs whose representativeness is debatable. This paper takes a step forward and is aimed at demonstrating the feasibility of using an integrated earth system dynamic modeling perspective to retrieve time- and scenario-dependent CFs that consider the complex interlinkages between natural processes delivering ES. The GUMBO (Global Unified Metamodel of the Biosphere) model is used to quantify changes in ES production in physical terms - leading to midpoint CFs - and changes in human welfare indicators, which are considered here as endpoint CFs. The interpretation of the obtained results highlights the key methodological challenges to be solved to consider this approach as a robust alternative to the mainstream rationale currently adopted in LCIA. Further research should focus on increasing the granularity of environmental interventions in the modeling tools to match current standards in LCA and on adapting the conceptual approach to a spatially-explicit integrated model.

  4. Neural network based dynamic controllers for industrial robots.

    PubMed

    Oh, S Y; Shin, W C; Kim, H G

    1995-09-01

    The industrial robot's dynamic performance is frequently measured by positioning accuracy at high speeds and a good dynamic controller is essential that can accurately compute robot dynamics at a servo rate high enough to ensure system stability. A real-time dynamic controller for an industrial robot is developed here using neural networks. First, an efficient time-selectable hidden layer architecture has been developed based on system dynamics localized in time, which lends itself to real-time learning and control along with enhanced mapping accuracy. Second, the neural network architecture has also been specially tuned to accommodate servo dynamics. This not only facilitates the system design through reduced sensing requirements for the controller but also enhances the control performance over the control architecture neglecting servo dynamics. Experimental results demonstrate the controller's excellent learning and control performances compared with a conventional controller and thus has good potential for practical use in industrial robots.

  5. 42 CFR 440.180 - Home or community-based services.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Home or community-based services. 440.180 Section 440.180 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL ASSISTANCE PROGRAMS SERVICES: GENERAL PROVISIONS Definitions § 440.180 Home...

  6. Creating Fee-Based Online Services: A New Role for Academic Librarians.

    ERIC Educational Resources Information Center

    Trehub, Aaron

    1999-01-01

    Discussion of the impact of the Internet on libraries focuses on librarians as creators and marketers of new online services. Describes two fee-based online services at the University of Illinois at Urbana-Champaign and concludes that academic libraries have the ability to create new online services, especially reference services. (Author/LRW)

  7. Characteristics Associated with Home- and Community-Based Service Utilization for Medicare Managed Care Consumers

    ERIC Educational Resources Information Center

    Alkema, Gretchen E.; Reyes, Judy Y.; Wilber, Kathleen H.

    2006-01-01

    Purpose: We identified the types of home-and community-based services (HCBS) that high-risk older adults in Medicare managed care used, and we examined participant characteristics associated with service use in six areas: overall service use, four specific categories of HCBS, and referrals to insured medical services. Design and Methods: We used…

  8. Efficient Quantum Private Communication Based on Dynamic Control Code Sequence

    NASA Astrophysics Data System (ADS)

    Cao, Zheng-Wen; Feng, Xiao-Yi; Peng, Jin-Ye; Zeng, Gui-Hua; Qi, Jin

    2017-04-01

    Based on chaos and quantum properties, we propose a quantum private communication scheme with dynamic control code sequence. The initial sequence is obtained via chaotic systems, and the control code sequence is derived by grouping, XOR and extracting. A shift cycle algorithm is designed to enable the dynamic change of control code sequence. Analysis shows that transmission efficiency could reach 100 % with high dynamics and security.

  9. Efficient Quantum Private Communication Based on Dynamic Control Code Sequence

    NASA Astrophysics Data System (ADS)

    Cao, Zheng-Wen; Feng, Xiao-Yi; Peng, Jin-Ye; Zeng, Gui-Hua; Qi, Jin

    2016-12-01

    Based on chaos and quantum properties, we propose a quantum private communication scheme with dynamic control code sequence. The initial sequence is obtained via chaotic systems, and the control code sequence is derived by grouping, XOR and extracting. A shift cycle algorithm is designed to enable the dynamic change of control code sequence. Analysis shows that transmission efficiency could reach 100 % with high dynamics and security.

  10. Learning to recognize objects on the fly: a neurally based dynamic field approach.

    PubMed

    Faubel, Christian; Schöner, Gregor

    2008-05-01

    Autonomous robots interacting with human users need to build and continuously update scene representations. This entails the problem of rapidly learning to recognize new objects under user guidance. Based on analogies with human visual working memory, we propose a dynamical field architecture, in which localized peaks of activation represent objects over a small number of simple feature dimensions. Learning consists of laying down memory traces of such peaks. We implement the dynamical field model on a service robot and demonstrate how it learns 30 objects from a very small number of views (about 5 per object are sufficient). We also illustrate how properties of feature binding emerge from this framework.

  11. System identification based approach to dynamic weighing revisited

    NASA Astrophysics Data System (ADS)

    Niedźwiecki, Maciej; Meller, Michał; Pietrzak, Przemysław

    2016-12-01

    Dynamic weighing, i.e., weighing of objects in motion, without stopping them on the weighing platform, allows one to increase the rate of operation of automatic weighing systems, used in industrial production processes, without compromising their accuracy. Since the classical identification-based approach to dynamic weighing, based on the second-order mass-spring-damper model of the weighing system, does not yield satisfactory results when applied to conveyor belt type checkweighers, several extensions of this technique are examined. Experiments confirm that when appropriately modified the identification-based approach becomes a reliable tool for dynamic mass measurement in checkweighers.

  12. Spatial and Temporal Dynamics and Value of Nature-Based Recreation, Estimated via Social Media.

    PubMed

    Sonter, Laura J; Watson, Keri B; Wood, Spencer A; Ricketts, Taylor H

    2016-01-01

    Conserved lands provide multiple ecosystem services, including opportunities for nature-based recreation. Managing this service requires understanding the landscape attributes underpinning its provision, and how changes in land management affect its contribution to human wellbeing over time. However, evidence from both spatially explicit and temporally dynamic analyses is scarce, often due to data limitations. In this study, we investigated nature-based recreation within conserved lands in Vermont, USA. We used geotagged photographs uploaded to the photo-sharing website Flickr to quantify visits by in-state and out-of-state visitors, and we multiplied visits by mean trip expenditures to show that conserved lands contributed US $1.8 billion (US $0.18-20.2 at 95% confidence) to Vermont's tourism industry between 2007 and 2014. We found eight landscape attributes explained the pattern of visits to conserved lands; visits were higher in larger conserved lands, with less forest cover, greater trail density and more opportunities for snow sports. Some of these attributes differed from those found in other locations, but all aligned with our understanding of recreation in Vermont. We also found that using temporally static models to inform conservation decisions may have perverse outcomes for nature-based recreation. For example, static models suggest conserved land with less forest cover receive more visits, but temporally dynamic models suggest clearing forests decreases, rather than increases, visits to these sites. Our results illustrate the importance of understanding both the spatial and temporal dynamics of ecosystem services for conservation decision-making.

  13. The Urbis Project: Identification and Characterization of Potential Urban Development Areas as a Web-Based Service

    NASA Astrophysics Data System (ADS)

    Manzke, Nina; Kada, Martin; Kastler, Thomas; Xu, Shaojuan; de Lange, Norbert; Ehlers, Manfred

    2016-06-01

    Urban sprawl and the related landscape fragmentation is a Europe-wide challenge in the context of sustainable urban planning. The URBan land recycling Information services for Sustainable cities (URBIS) project aims for the development, implementation, and validation of web-based information services for urban vacant land in European functional urban areas in order to provide end-users with site specific characteristics and to facilitate the identification and evaluation of potential development areas. The URBIS services are developed based on open geospatial data. In particular, the Copernicus Urban Atlas thematic layers serve as the main data source for an initial inventory of sites. In combination with remotely sensed data like SPOT5 images and ancillary datasets like OpenStreetMap, detailed site specific information is extracted. Services are defined for three main categories: i) baseline services, which comprise an initial inventory and typology of urban land, ii) update services, which provide a regular inventory update as well as an analysis of urban land use dynamics and changes, and iii) thematic services, which deliver specific information tailored to end-users' needs.

  14. Agent-based services for B2B electronic commerce

    NASA Astrophysics Data System (ADS)

    Fong, Elizabeth; Ivezic, Nenad; Rhodes, Tom; Peng, Yun

    2000-12-01

    The potential of agent-based systems has not been realized yet, in part, because of the lack of understanding of how the agent technology supports industrial needs and emerging standards. The area of business-to-business electronic commerce (b2b e-commerce) is one of the most rapidly developing sectors of industry with huge impact on manufacturing practices. In this paper, we investigate the current state of agent technology and the feasibility of applying agent-based computing to b2b e-commerce in the circuit board manufacturing sector. We identify critical tasks and opportunities in the b2b e-commerce area where agent-based services can best be deployed. We describe an implemented agent-based prototype system to facilitate the bidding process for printed circuit board manufacturing and assembly. These activities are taking place within the Internet Commerce for Manufacturing (ICM) project, the NIST- sponsored project working with industry to create an environment where small manufacturers of mechanical and electronic components may participate competitively in virtual enterprises that manufacture printed circuit assemblies.

  15. Activity-Based Costing in the After Press Services Industry

    NASA Astrophysics Data System (ADS)

    Shevasuthisilp, Suntichai; Punsathitwong, Kosum

    2009-10-01

    This research was conducted to apply activity-based costing (ABC) in an after press service company in Chiang Mai province, Thailand. The company produces all of its products by one-stop service (such as coating, stitching, binding, die cutting, and gluing). All products are made to order, and have different sizes and patterns. A strategy of low price is used to compete in the marketplace. After cost analysis, the study found that the company has high overhead (36.5% of total cost). The company's problem is its use of traditional cost accounting, which has low accuracy in assigning overhead costs. If management uses this information when pricing customer orders, losses may occur because real production costs may be higher than the selling price. Therefore, the application of ABC in cost analysis can help executives receive accurate cost information; establish a sound pricing strategy; and improve the manufacturing process by determining work activities which have excessively high production costs. According to this research, 6 out of 56 items had a production cost higher than the selling price, leading to losses of 123,923 baht per year. Methods used to solve this problem were: reducing production costs; establishing suitable prices; and creating a sales promotion with lower prices for customers whose orders include processes involving unused capacity. These actions will increase overall sales of the company, and allow more efficient use of its machinery.

  16. Dynamic Group Formation Based on a Natural Phenomenon

    ERIC Educational Resources Information Center

    Zedadra, Amina; Lafifi, Yacine; Zedadra, Ouarda

    2016-01-01

    This paper presents a new approach of learners grouping in collaborative learning systems. This grouping process is based on traces left by learners. The goal is the circular dynamic grouping to achieve collaborative projects. The proposed approach consists of two main algorithms: (1) the circular grouping algorithm and (2) the dynamic grouping…

  17. A Dynamic Usage Based Perspective on L2 Writing

    ERIC Educational Resources Information Center

    Verspoor, Marjolijn; Schmid, Monika S.; Xu, Xiaoyan

    2012-01-01

    The goal of this study was to explore the contribution that a dynamic usage based (DUB) perspective can bring to the establishment of objective measures to assess L2 learners' written texts and at the same time to gain insight into the dynamic process of language development. Four hundred and thirty seven texts written by Dutch learners of English…

  18. Eradication of Ebola Based on Dynamic Programming

    PubMed Central

    Zhu, Jia-Ming; Wang, Lu; Liu, Jia-Bao

    2016-01-01

    This paper mainly studies the eradication of the Ebola virus, proposing a scientific system, including three modules for the eradication of Ebola virus. Firstly, we build a basic model combined with nonlinear incidence rate and maximum treatment capacity. Secondly, we use the dynamic programming method and the Dijkstra Algorithm to set up M-S (storage) and several delivery locations in West Africa. Finally, we apply the previous results to calculate the total cost, production cost, storage cost, and shortage cost. PMID:27313655

  19. Minimizing the Total Service Time of Discrete Dynamic Berth Allocation Problem by an Iterated Greedy Heuristic

    PubMed Central

    2014-01-01

    Berth allocation is the forefront operation performed when ships arrive at a port and is a critical task in container port optimization. Minimizing the time ships spend at berths constitutes an important objective of berth allocation problems. This study focuses on the discrete dynamic berth allocation problem (discrete DBAP), which aims to minimize total service time, and proposes an iterated greedy (IG) algorithm to solve it. The proposed IG algorithm is tested on three benchmark problem sets. Experimental results show that the proposed IG algorithm can obtain optimal solutions for all test instances of the first and second problem sets and outperforms the best-known solutions for 35 out of 90 test instances of the third problem set. PMID:25295295

  20. Minimizing the total service time of discrete dynamic berth allocation problem by an iterated greedy heuristic.

    PubMed

    Lin, Shih-Wei; Ying, Kuo-Ching; Wan, Shu-Yen

    2014-01-01

    Berth allocation is the forefront operation performed when ships arrive at a port and is a critical task in container port optimization. Minimizing the time ships spend at berths constitutes an important objective of berth allocation problems. This study focuses on the discrete dynamic berth allocation problem (discrete DBAP), which aims to minimize total service time, and proposes an iterated greedy (IG) algorithm to solve it. The proposed IG algorithm is tested on three benchmark problem sets. Experimental results show that the proposed IG algorithm can obtain optimal solutions for all test instances of the first and second problem sets and outperforms the best-known solutions for 35 out of 90 test instances of the third problem set.

  1. The cloud services innovation platform- enabling service-based environmental modelling using infrastructure-as-a-service cloud computing

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Service oriented architectures allow modelling engines to be hosted over the Internet abstracting physical hardware configuration and software deployments from model users. Many existing environmental models are deployed as desktop applications running on user's personal computers (PCs). Migration ...

  2. A Novel Trust Service Provider for Internet Based Commerce Applications.

    ERIC Educational Resources Information Center

    Siyal, M. Y.; Barkat, B.

    2002-01-01

    Presents a framework for enhancing trust in Internet commerce. Shows how trust can be provided through a network of Trust Service Providers (TSp). Identifies a set of services that should be offered by a TSp. Presents a distributed object-oriented implementation of trust services using CORBA, JAVA and XML. (Author/AEF)

  3. A site-based approach to delivering rangeland ecosystem services

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Rangeland ecosystems are capable of providing an array of ecosystem services important to the wellbeing of society. Some of these services (e.g. meat, fibre) are transported to markets and their quantity, quality and value are established via a set of widely accepted standards. Other services (e.g. ...

  4. Community Based Demonstration Projects: Willamette Ecosystem Services Project (WESP)

    EPA Science Inventory

    EPA’s Ecosystem Services Research Program in the Office of Research and Development is focused on the study of ecosystem services and the benefits to human well-being provided by ecological systems. As part of this research effort, the Willamette Ecosystems Services Project (WE...

  5. Location, Location, Location: Where Do Location-Based Services Fit into Your Institution's Social Media Mix?

    ERIC Educational Resources Information Center

    Nekritz, Tim

    2011-01-01

    Foursquare is a location-based social networking service that allows users to share their location with friends. Some college administrators have been thinking about whether and how to take the leap into location-based services, which are also known as geosocial networking services. These platforms, which often incorporate gaming elements like…

  6. No More Free Lunch: Commercial Fee-Based Information Services--Past, Present and Future.

    ERIC Educational Resources Information Center

    Wright, A. J.

    This discussion of nongovernmental public- and private-sector fee-based information services in the changing library, social, and technological environment includes descriptions of the relationships between libraries and commercial firms, types of fee-based information services, and the services provided by commercial information vendors. Brief…

  7. 26 CFR 1.954-4 - Foreign base company services income.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 10 2014-04-01 2013-04-01 true Foreign base company services income. 1.954-4... company services income. (a) Items included. Except as provided in paragraph (d) of this section, foreign base company services income means income of a controlled foreign corporation, whether in the form...

  8. 26 CFR 1.954-4 - Foreign base company services income.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 10 2012-04-01 2012-04-01 false Foreign base company services income. 1.954-4... company services income. (a) Items included. Except as provided in paragraph (d) of this section, foreign base company services income means income of a controlled foreign corporation, whether in the form...

  9. 26 CFR 1.954-4 - Foreign base company services income.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 10 2013-04-01 2013-04-01 false Foreign base company services income. 1.954-4... company services income. (a) Items included. Except as provided in paragraph (d) of this section, foreign base company services income means income of a controlled foreign corporation, whether in the form...

  10. 26 CFR 1.954-4 - Foreign base company services income.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 10 2011-04-01 2011-04-01 false Foreign base company services income. 1.954-4... company services income. (a) Items included. Except as provided in paragraph (d) of this section, foreign base company services income means income of a controlled foreign corporation, whether in the form...

  11. Model based control of dynamic atomic force microscope

    NASA Astrophysics Data System (ADS)

    Lee, Chibum; Salapaka, Srinivasa M.

    2015-04-01

    A model-based robust control approach is proposed that significantly improves imaging bandwidth for the dynamic mode atomic force microscopy. A model for cantilever oscillation amplitude and phase dynamics is derived and used for the control design. In particular, the control design is based on a linearized model and robust H∞ control theory. This design yields a significant improvement when compared to the conventional proportional-integral designs and verified by experiments.

  12. Model based control of dynamic atomic force microscope.

    PubMed

    Lee, Chibum; Salapaka, Srinivasa M

    2015-04-01

    A model-based robust control approach is proposed that significantly improves imaging bandwidth for the dynamic mode atomic force microscopy. A model for cantilever oscillation amplitude and phase dynamics is derived and used for the control design. In particular, the control design is based on a linearized model and robust H(∞) control theory. This design yields a significant improvement when compared to the conventional proportional-integral designs and verified by experiments.

  13. Model based control of dynamic atomic force microscope

    SciTech Connect

    Lee, Chibum; Salapaka, Srinivasa M.

    2015-04-15

    A model-based robust control approach is proposed that significantly improves imaging bandwidth for the dynamic mode atomic force microscopy. A model for cantilever oscillation amplitude and phase dynamics is derived and used for the control design. In particular, the control design is based on a linearized model and robust H{sub ∞} control theory. This design yields a significant improvement when compared to the conventional proportional-integral designs and verified by experiments.

  14. Dynamic Inversion based Control of a Docking Mechanism

    NASA Technical Reports Server (NTRS)

    Kulkarni, Nilesh V.; Ippolito, Corey; Krishnakumar, Kalmanje

    2006-01-01

    The problem of position and attitude control of the Stewart platform based docking mechanism is considered motivated by its future application in space missions requiring the autonomous docking capability. The control design is initiated based on the framework of the intelligent flight control architecture being developed at NASA Ames Research Center. In this paper, the baseline position and attitude control system is designed using dynamic inversion with proportional-integral augmentation. The inverse dynamics uses a Newton-Euler formulation that includes the platform dynamics, the dynamics of the individual legs along with viscous friction in the joints. Simulation results are presented using forward dynamics simulated by a commercial physics engine that builds the system as individual elements with appropriate joints and uses constrained numerical integration,

  15. PIE: A Dynamic Failure-Based Technique

    NASA Technical Reports Server (NTRS)

    Voas, Jeffrey M.

    1990-01-01

    This paper presents a dynamic technique for statistically estimating three program characteristics that affect a program's computational behavior: (1) the probability that a particular section of a program is executed, (2) the probability that the particular section affects the data state, and (3) the probability that a data state produced by that section has an effect on program output. These three characteristics can be used to predict whether faults are likely to be uncovered by software testing. Index Terms: Software testing, data state, fault, failure, testability. 1 Introduction

  16. Responsiveness to HIV education and VCT services among Kenyan rural women: a community-based survey.

    PubMed

    Karau, Paul Bundi; Winnie, Mueni Saumu; Geoffrey, Muriira; Mwenda, Mukuthuria

    2010-09-01

    Uptake of VCT and other HIV prevention strategies among rural African women is affected by various socio-cultural and economic factors which need elucidation. Our aim was to establish the responsiveness to HIV education among rural women attending three dispensaries in Kenya. This study was designed to assess gender and psycho-social factors that influence HIV dynamics in rural Kenya. This was a cross-sectional questionnaire based study of 1347 women, conducted in October 2009. Socio-economic status as well as knowledge on methods of HIV transmission was assessed. Testing status, knowledge on existing VCT services and willingness to share HIV information with their children was assessed. Majority of the women have heard about VCT services, but significantly few of them have been tested. Those with secondary school education and above are more knowledgeable on methods of HIV transmission, while those with inadequate education are more likely to cite shaking hands, sharing utensils, mosquito bites and hugging as means of transmission (p = 0.001). 90% of educated women are willing to share HIV information with their children, compared to 40% of uneducated women. Marital status is seen to positively influence testing status, but has no significant effect on dissemination of information to children. We conclude that despite the aggressive HIV education and proliferation of VCT services in Kenya, women are not heeding the call to get tested. Education has a positive impact on dissemination of HIV information. Focus needs to shift into increasing acceptability of testing by women in rural Kenya.

  17. 78 FR 56266 - Consent Based Social Security Number Verification (CBSV) Service

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-12

    ... Security number (SSN) verification services to enrolled private businesses, State and local government... From the Federal Register Online via the Government Publishing Office SOCIAL SECURITY ADMINISTRATION Consent Based Social Security Number Verification (CBSV) Service AGENCY: Social...

  18. Novel web service selection model based on discrete group search.

    PubMed

    Zhai, Jie; Shao, Zhiqing; Guo, Yi; Zhang, Haiteng

    2014-01-01

    In our earlier work, we present a novel formal method for the semiautomatic verification of specifications and for describing web service composition components by using abstract concepts. After verification, the instantiations of components were selected to satisfy the complex service performance constraints. However, selecting an optimal instantiation, which comprises different candidate services for each generic service, from a large number of instantiations is difficult. Therefore, we present a new evolutionary approach on the basis of the discrete group search service (D-GSS) model. With regard to obtaining the optimal multiconstraint instantiation of the complex component, the D-GSS model has competitive performance compared with other service selection models in terms of accuracy, efficiency, and ability to solve high-dimensional service composition component problems. We propose the cost function and the discrete group search optimizer (D-GSO) algorithm and study the convergence of the D-GSS model through verification and test cases.

  19. The Shape of Services To Come: Values-Based Reference Service for the Largely Digital Library.

    ERIC Educational Resources Information Center

    Ferguson, Chris D.; Bunge, Charles A.

    1997-01-01

    Argues that while academic libraries should integrate technology, maintain holistic computing environments, deliver core services through networks, make technology work for everyone not just the technologically adroit, and collaborate across administrative lines, reference services should retain traditional values such as equity of access,…

  20. The Development of a Web-service-based On-demand Global Agriculture Drought Information System

    NASA Astrophysics Data System (ADS)

    Deng, M.; Di, L.; Han, W.; Yagci, A.; Peng, C.

    2011-12-01

    data, biophysical characteristics of the environment, and time-series weather data. The trained algorithm establishes a per-pixel model to produce on-demand drought prediction at ~1km or higher spatial resolution. The Phase-I system implementation is concentrated on NDVI-based drought monitoring to demonstrate the concept and feasibility. In phase I, 30-year calibrated global weekly NDVI composites from AVHRR and MODIS are used to establish the baseline and dynamics of vegetation conditions for each co-registered pixel. Multiple NDVI-based agricultural drought indices, such as vegetation condition index (VCI), have been computed from the baseline and dynamics for drought monitoring. GADMFS is a contributing component of Global Earth Observation System of Systems (GEOSS) to serve the GEOSS societal benefit area of agriculture and water. The phase-I implementation shows that open and interoperable drought related data services and processing services from this system have significantly increased the accessibility of remote sensing based agriculture drought information to the world-wide users. Such a system will also increase the utilization of drought indices related applications and researches in the GEOSS community.

  1. [ESC-20 Community-Based Services Work Adjustment Program; Community-Based Work Training Curriculum.

    ERIC Educational Resources Information Center

    Dildy, Dennis R.

    The Community-Based Services Work Adjustment Program provides vocational assessment, work adjustment training, social adjustment training, extended sheltered employment, transitional/supported employment, and competitive job training and placement through on-the-job training at natural community work sites. The program serves mentally retarded,…

  2. An Extension Dynamic Model Based on BDI Agent

    NASA Astrophysics Data System (ADS)

    Yu, Wang; Feng, Zhu; Hua, Geng; WangJing, Zhu

    this paper's researching is based on the model of BDI Agent. Firstly, This paper analyze the deficiencies of the traditional BDI Agent model, Then propose an extension dynamic model of BDI Agent based on the traditional ones. It can quickly achieve the internal interaction of the tradition model of BDI Agent, deal with complex issues under dynamic and open environment and achieve quick reaction of the model. The new model is a natural and reasonable model by verifying the origin of civilization using the model of monkeys to eat sweet potato based on the design of the extension dynamic model. It is verified to be feasible by comparing the extended dynamic BDI Agent model with the traditional BDI Agent Model uses the SWARM, it has important theoretical significance.

  3. TinyOS-based quality of service management in wireless sensor networks

    USGS Publications Warehouse

    Peterson, N.; Anusuya-Rangappa, L.; Shirazi, B.A.; Huang, R.; Song, W.-Z.; Miceli, M.; McBride, D.; Hurson, A.; LaHusen, R.

    2009-01-01

    Previously the cost and extremely limited capabilities of sensors prohibited Quality of Service (QoS) implementations in wireless sensor networks. With advances in technology, sensors are becoming significantly less expensive and the increases in computational and storage capabilities are opening the door for new, sophisticated algorithms to be implemented. Newer sensor network applications require higher data rates with more stringent priority requirements. We introduce a dynamic scheduling algorithm to improve bandwidth for high priority data in sensor networks, called Tiny-DWFQ. Our Tiny-Dynamic Weighted Fair Queuing scheduling algorithm allows for dynamic QoS for prioritized communications by continually adjusting the treatment of communication packages according to their priorities and the current level of network congestion. For performance evaluation, we tested Tiny-DWFQ, Tiny-WFQ (traditional WFQ algorithm implemented in TinyOS), and FIFO queues on an Imote2-based wireless sensor network and report their throughput and packet loss. Our results show that Tiny-DWFQ performs better in all test cases. ?? 2009 IEEE.

  4. Gigabit network-based three-dimensional trial service on media delivery platform

    NASA Astrophysics Data System (ADS)

    Kim, Nac-Woo; Son, Seung-Chul; Lee, Byung-Tak

    2011-09-01

    Recently, as effective demand for high-quality, large-capacity content such as three-dimensional (3D), multiangle, and gigabit-web has increased, a network infrastructure capable of satisfying future broadcast and communication service requirements is required. In this paper, we introduce a convergence service based on a gigabit network and then propose a technique for delivering gigabit 3D content. Here, the term 3D content delivery technique refers to an overlay-multicast-based distributed service platform that is comprised of a media relay agent and a management server. The service platform is designed to back up both live video and file-based video streaming. Using this platform, we can provide 3D remote education and 3D multiangle services via 3D-based video streaming between a service provider and service consumers dispersed at different locations. To evaluate our 3D content delivery technique, we run a series of trials of gigabit network-based 3D trial services to service subscribers. Then, we conduct a survey to measure user satisfaction with the 3D delivery service and simulated network and service quality. From experimental results, we confirm that this type of distributed service platform can be used as the delivery framework for applications such as realistic 3D-based seminars or 3D video conferences.

  5. The implementation of community-based crisis services for people with acute psychiatric illness.

    PubMed

    Finch, S J; Burgess, P M; Herrman, H E

    1991-06-01

    This article describes three recently established community-based crisis services for people with acute psychiatric illness. Data were obtained from local information systems developed in the early phase of service operation. Patterns of service were found to vary among the teams in terms of the frequency of contact with the client, the period of contact with the client and the overall numbers of contacts. Such diversification of services reflects, at least in part, the differences in the service networks within which the new services were Such diversification of services is inevitable and creative, and the evaluation of these services must consider not only the short-term impact of crisis services, but also the impact of the network of care services on longer term outcomes for the client.

  6. IoT-based user-driven service modeling environment for a smart space management system.

    PubMed

    Choi, Hoan-Suk; Rhee, Woo-Seop

    2014-11-20

    The existing Internet environment has been extended to the Internet of Things (IoT) as an emerging new paradigm. The IoT connects various physical entities. These entities have communication capability and deploy the observed information to various service areas such as building management, energy-saving systems, surveillance services, and smart homes. These services are designed and developed by professional service providers. Moreover, users' needs have become more complicated and personalized with the spread of user-participation services such as social media and blogging. Therefore, some active users want to create their own services to satisfy their needs, but the existing IoT service-creation environment is difficult for the non-technical user because it requires a programming capability to create a service. To solve this problem, we propose the IoT-based user-driven service modeling environment to provide an easy way to create IoT services. Also, the proposed environment deploys the defined service to another user. Through the personalization and customization of the defined service, the value and dissemination of the service is increased. This environment also provides the ontology-based context-information processing that produces and describes the context information for the IoT-based user-driven service.

  7. IoT-Based User-Driven Service Modeling Environment for a Smart Space Management System

    PubMed Central

    Choi, Hoan-Suk; Rhee, Woo-Seop

    2014-01-01

    The existing Internet environment has been extended to the Internet of Things (IoT) as an emerging new paradigm. The IoT connects various physical entities. These entities have communication capability and deploy the observed information to various service areas such as building management, energy-saving systems, surveillance services, and smart homes. These services are designed and developed by professional service providers. Moreover, users' needs have become more complicated and personalized with the spread of user-participation services such as social media and blogging. Therefore, some active users want to create their own services to satisfy their needs, but the existing IoT service-creation environment is difficult for the non-technical user because it requires a programming capability to create a service. To solve this problem, we propose the IoT-based user-driven service modeling environment to provide an easy way to create IoT services. Also, the proposed environment deploys the defined service to another user. Through the personalization and customization of the defined service, the value and dissemination of the service is increased. This environment also provides the ontology-based context-information processing that produces and describes the context information for the IoT-based user-driven service. PMID:25420153

  8. The developing one door licensing service system based on RESTful oriented services and MVC framework

    NASA Astrophysics Data System (ADS)

    Widiyanto, Sigit; Setyawan, Aris Budi; Tarigan, Avinanta; Sussanto, Herry

    2016-02-01

    The increase of the number of business impact on the increasing service requirements for companies and Small Medium Enterprises (SMEs) in submitting their license request. The service system that is needed must be able to accommodate a large number of documents, various institutions, and time limitations of applicant. In addition, it is also required distributed applications which is able to be integrated each other. Service oriented application fits perfectly developed along client-server application which has been developed by the Government to digitalize submitted data. RESTful architecture and MVC framework are embedded in developing application. As a result, the application proves its capability in solving security, transaction speed, and data accuracy issues.

  9. 45 CFR 2516.100 - What is the purpose of school-based service-learning programs?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... school-based service-learning programs is to promote service-learning as a strategy to support high... 45 Public Welfare 4 2014-10-01 2014-10-01 false What is the purpose of school-based service... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS...

  10. 45 CFR 2516.100 - What is the purpose of school-based service-learning programs?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... school-based service-learning programs is to promote service-learning as a strategy to support high... 45 Public Welfare 4 2013-10-01 2013-10-01 false What is the purpose of school-based service... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS...

  11. 45 CFR 2516.100 - What is the purpose of school-based service-learning programs?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... school-based service-learning programs is to promote service-learning as a strategy to support high... 45 Public Welfare 4 2011-10-01 2011-10-01 false What is the purpose of school-based service... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS...

  12. An agent-based peer-to-peer architecture for semantic discovery of manufacturing services across virtual enterprises

    NASA Astrophysics Data System (ADS)

    Zhang, Wenyu; Zhang, Shuai; Cai, Ming; Jian, Wu

    2015-04-01

    With the development of virtual enterprise (VE) paradigm, the usage of serviceoriented architecture (SOA) is increasingly being considered for facilitating the integration and utilisation of distributed manufacturing resources. However, due to the heterogeneous nature among VEs, the dynamic nature of a VE and the autonomous nature of each VE member, the lack of both sophisticated coordination mechanism in the popular centralised infrastructure and semantic expressivity in the existing SOA standards make the current centralised, syntactic service discovery method undesirable. This motivates the proposed agent-based peer-to-peer (P2P) architecture for semantic discovery of manufacturing services across VEs. Multi-agent technology provides autonomous and flexible problemsolving capabilities in dynamic and adaptive VE environments. Peer-to-peer overlay provides highly scalable coupling across decentralised VEs, each of which exhibiting as a peer composed of multiple agents dealing with manufacturing services. The proposed architecture utilises a novel, efficient, two-stage search strategy - semantic peer discovery and semantic service discovery - to handle the complex searches of manufacturing services across VEs through fast peer filtering. The operation and experimental evaluation of the prototype system are presented to validate the implementation of the proposed approach.

  13. Scalable Advanced Network Services Based on Coordinated Active Components

    DTIC Science & Technology

    2004-02-01

    as a means of customizing both high functionality and scalable communication components to meet the needs of specific services. • A service...considering both the service quality for the user and the efficient use of the infrastructure (cost). ( 4 ) Finally, the synthesizer needs to configure the...response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed , and completing

  14. Research on the Hotel Image Based on the Detail Service

    NASA Astrophysics Data System (ADS)

    Li, Ban; Shenghua, Zheng; He, Yi

    Detail service management, initially developed as marketing programs to enhance customer loyalty, has now become an important part of customer relation strategy. This paper analyzes the critical factors of detail service and its influence on the hotel image. We establish the theoretical model of influencing factors on hotel image and propose corresponding hypotheses. We use applying statistical method to test and verify the above-mentioned hypotheses. This paper provides a foundation for further study of detail service design and planning issues.

  15. Modeling the population dynamics of pacific yew. Forest Service research note

    SciTech Connect

    Busing, R.T.; Spies, T.A.

    1995-05-01

    A study of Pacific yew (Taxus brevifolia Nutt.) population dynamics in the mountains of western Oregon and Washington was based on a combination of long-term population data and computer modeling. Rates of growth and mortality were low in mature and old-growth forest stands. Diameter growth at breast height ranged from 0 to 3 centimeters per decade. The annual mortality rate for individuals greater than 5 centimeters in diameter at breast height was about 1 percent of the population. A matrix population model was constructed by using these and other fundamental data on yew population dynamics. The model was designed to perform population viability analyses of yew under various harvest regimes. Model projections suggested a slow rate of recovery from major disturbance.

  16. GEOSS authentication/authorization services: a Broker-based approach

    NASA Astrophysics Data System (ADS)

    Santoro, M.; Nativi, S.

    2014-12-01

    The vision of the Global Earth Observation System of Systems (GEOSS) is the achievement of societal benefits through voluntary contribution and sharing of resources to better understand the relationships between the society and the environment where we live. The GEOSS Common Infrastructure (GCI) allows users to search, access, and use the resources contributed by the GEOSS members. The GEO DAB (Discovery and Access Broker) is the GCI component in charge of interconnecting the heterogeneous data systems contributing to GEOSS. Client applications (i.e. the portals and apps) can connect to GEO DAB as a unique entry point to discover and access resources available through GCI, with no need to implement the many service protocols and models applied by the GEOSS data providers. The GEO DAB implements the brokering approach (Nativi et al., 2013) to build a flexible and scalable System of Systems. User authentication/authorization functionality is becoming more and more important for GEOSS data providers and users. The Providers ask for information about who accessed their resources and, in some cases, want to limit the data download. The Users ask for a profiled interaction with the system based on their needs and expertise level. Besides, authentication and authorization is necessary for GEOSS to provide moderated social services - e.g. feedback messages, data "fit for use" comments, etc. In keeping with the GEOSS principles of building on existing systems and lowering entry-barriers for users, an objective of the authentication/authorization development was to support existing and well-used users' credentials (e.g. Google, Twitter, etc.). Due to the heterogeneity of technologies used by the different providers and applications, a broker-based approach for the authentication/authorization was introduced as a new functionality of GEO DAB. This new capability will be demonstrated at the next GEO XI Plenary (November 2014). This work will be presented and discussed

  17. A neural network based reputation bootstrapping approach for service selection

    NASA Astrophysics Data System (ADS)

    Wu, Quanwang; Zhu, Qingsheng; Li, Peng

    2015-10-01

    With the concept of service-oriented computing becoming widely accepted in enterprise application integration, more and more computing resources are encapsulated as services and published online. Reputation mechanism has been studied to establish trust on prior unknown services. One of the limitations of current reputation mechanisms is that they cannot assess the reputation of newly deployed services as no record of their previous behaviours exists. Most of the current bootstrapping approaches merely assign default reputation values to newcomers. However, by this kind of methods, either newcomers or existing services will be favoured. In this paper, we present a novel reputation bootstrapping approach, where correlations between features and performance of existing services are learned through an artificial neural network (ANN) and they are then generalised to establish a tentative reputation when evaluating new and unknown services. Reputations of services published previously by the same provider are also incorporated for reputation bootstrapping if available. The proposed reputation bootstrapping approach is seamlessly embedded into an existing reputation model and implemented in the extended service-oriented architecture. Empirical studies of the proposed approach are shown at last.

  18. Parameterizing Coefficients of a POD-Based Dynamical System

    NASA Technical Reports Server (NTRS)

    Kalb, Virginia L.

    2010-01-01

    A method of parameterizing the coefficients of a dynamical system based of a proper orthogonal decomposition (POD) representing the flow dynamics of a viscous fluid has been introduced. (A brief description of POD is presented in the immediately preceding article.) The present parameterization method is intended to enable construction of the dynamical system to accurately represent the temporal evolution of the flow dynamics over a range of Reynolds numbers. The need for this or a similar method arises as follows: A procedure that includes direct numerical simulation followed by POD, followed by Galerkin projection to a dynamical system has been proven to enable representation of flow dynamics by a low-dimensional model at the Reynolds number of the simulation. However, a more difficult task is to obtain models that are valid over a range of Reynolds numbers. Extrapolation of low-dimensional models by use of straightforward Reynolds-number-based parameter continuation has proven to be inadequate for successful prediction of flows. A key part of the problem of constructing a dynamical system to accurately represent the temporal evolution of the flow dynamics over a range of Reynolds numbers is the problem of understanding and providing for the variation of the coefficients of the dynamical system with the Reynolds number. Prior methods do not enable capture of temporal dynamics over ranges of Reynolds numbers in low-dimensional models, and are not even satisfactory when large numbers of modes are used. The basic idea of the present method is to solve the problem through a suitable parameterization of the coefficients of the dynamical system. The parameterization computations involve utilization of the transfer of kinetic energy between modes as a function of Reynolds number. The thus-parameterized dynamical system accurately predicts the flow dynamics and is applicable to a range of flow problems in the dynamical regime around the Hopf bifurcation. Parameter

  19. Scheduling based on a dynamic resource connection

    NASA Astrophysics Data System (ADS)

    Nagiyev, A. E.; Botygin, I. A.; Shersntneva, A. I.; Konyaev, P. A.

    2017-02-01

    The practical using of distributed computing systems associated with many problems, including troubles with the organization of an effective interaction between the agents located at the nodes of the system, with the specific configuration of each node of the system to perform a certain task, with the effective distribution of the available information and computational resources of the system, with the control of multithreading which implements the logic of solving research problems and so on. The article describes the method of computing load balancing in distributed automatic systems, focused on the multi-agency and multi-threaded data processing. The scheme of the control of processing requests from the terminal devices, providing the effective dynamic scaling of computing power under peak load is offered. The results of the model experiments research of the developed load scheduling algorithm are set out. These results show the effectiveness of the algorithm even with a significant expansion in the number of connected nodes and zoom in the architecture distributed computing system.

  20. Flash flood warning based on fully dynamic hydrology modelling

    NASA Astrophysics Data System (ADS)

    Pejanovic, Goran; Petkovic, Slavko; Cvetkovic, Bojan; Nickovic, Slobodan

    2016-04-01

    Numerical hydrologic modeling has achieved limited success in the past due to, inter alia, lack of adequate input data. Over the last decade, data availability has improved substantially. For modelling purposes, high-resolution data on topography, river routing, and land cover and soil features have meanwhile become available, as well as the observations such as radar precipitation information. In our study, we have implemented the HYPROM model (Hydrology Prognostic Model) to predict a flash flood event at a smaller-scale basin in Southern Serbia. HYPROM is based on the full set of governing equations for surface hydrological dynamics, in which momentum components, along with the equation of mass continuity, are used as full prognostic equations. HYPROM also includes a river routing module serving as a collector for the extra surface water. Such approach permits appropriate representation of different hydrology scales ranging from flash floods to flows of large and slow river basins. The use of full governing equations, if not appropriately parameterized, may lead to numerical instability systems when the surface water in a model is vanishing. To resolve these modelling problems, an unconditionally stable numerical scheme and a method for height redistribution avoiding shortwave height noise have been developed in HYPROM, which achieve numerical convergence of u, v and h when surface water disappears. We have applied HYPROM, driven by radar-estimated precipitation, to predict flash flooding occurred over smaller and medium-size river basins. Two torrential rainfall cases have been simulated to check the accuracy of the model: the exceptional flooding of May 2014 in Western Serbia, and the convective flash flood of January 2015 in Southern Serbia. The second episode has been successfully predicted by HYPROM in terms of timing and intensity six hours before the event occurred. Such flash flood warning system is in preparation to be operationally implemented in the

  1. Khayyam with Cabri: Experiences of Pre-Service Mathematics Teachers with Khayyam's Solution of Cubic Equations in Dynamic Geometry Environment

    ERIC Educational Resources Information Center

    Baki, Adnan; Guven, Bulent

    2009-01-01

    The study reported in this article deals with the observed actions of Turkish pre-service mathematics teachers in dynamic geometry environment (DGE) as they were learning Khayyam's method for solving cubic equations formed as x[superscript 3] + ax = b. Having learned the method, modelled it in DGE and verified the correctness of the solution,…

  2. Distributed service-based approach for sensor data fusion in IoT environments.

    PubMed

    Rodríguez-Valenzuela, Sandra; Holgado-Terriza, Juan A; Gutiérrez-Guerrero, José M; Muros-Cobos, Jesús L

    2014-10-15

    The Internet of Things (IoT) enables the communication among smart objects promoting the pervasive presence around us of a variety of things or objects that are able to interact and cooperate jointly to reach common goals. IoT objects can obtain data from their context, such as the home, office, industry or body. These data can be combined to obtain new and more complex information applying data fusion processes. However, to apply data fusion algorithms in IoT environments, the full system must deal with distributed nodes, decentralized communication and support scalability and nodes dynamicity, among others restrictions. In this paper, a novel method to manage data acquisition and fusion based on a distributed service composition model is presented, improving the data treatment in IoT pervasive environments.

  3. Distributed Service-Based Approach for Sensor Data Fusion in IoT Environments

    PubMed Central

    Rodríguez-Valenzuela, Sandra; Holgado-Terriza, Juan A.; Gutiérrez-Guerrero, José M.; Muros-Cobos, Jesús L.

    2014-01-01

    The Internet of Things (IoT) enables the communication among smart objects promoting the pervasive presence around us of a variety of things or objects that are able to interact and cooperate jointly to reach common goals. IoT objects can obtain data from their context, such as the home, office, industry or body. These data can be combined to obtain new and more complex information applying data fusion processes. However, to apply data fusion algorithms in IoT environments, the full system must deal with distributed nodes, decentralized communication and support scalability and nodes dynamicity, among others restrictions. In this paper, a novel method to manage data acquisition and fusion based on a distributed service composition model is presented, improving the data treatment in IoT pervasive environments. PMID:25320907

  4. Scale-invariant entropy-based theory for dynamic ordering

    SciTech Connect

    Mahulikar, Shripad P. E-mail: spm@aero.iitb.ac.in; Kumari, Priti

    2014-09-01

    Dynamically Ordered self-organized dissipative structure exists in various forms and at different scales. This investigation first introduces the concept of an isolated embedding system, which embeds an open system, e.g., dissipative structure and its mass and/or energy exchange with its surroundings. Thereafter, scale-invariant theoretical analysis is presented using thermodynamic principles for Order creation, existence, and destruction. The sustainability criterion for Order existence based on its structured mass and/or energy interactions with the surroundings is mathematically defined. This criterion forms the basis for the interrelationship of physical parameters during sustained existence of dynamic Order. It is shown that the sufficient condition for dynamic Order existence is approached if its sustainability criterion is met, i.e., its destruction path is blocked. This scale-invariant approach has the potential to unify the physical understanding of universal dynamic ordering based on entropy considerations.

  5. Improving structure-based function prediction using molecular dynamics

    PubMed Central

    Glazer, Dariya S.; Radmer, Randall J.; Altman, Russ B.

    2009-01-01

    Summary The number of molecules with solved three-dimensional structure but unknown function is increasing rapidly. Particularly problematic are novel folds with little detectable similarity to molecules of known function. Experimental assays can determine the functions of such molecules, but are time-consuming and expensive. Computational approaches can identify potential functional sites; however, these approaches generally rely on single static structures and do not use information about dynamics. In fact, structural dynamics can enhance function prediction: we coupled molecular dynamics simulations with structure-based function prediction algorithms that identify Ca2+ binding sites. When applied to 11 challenging proteins, both methods showed substantial improvement in performance, revealing 22 more sites in one case and 12 more in the other, with a modest increase in apparent false positives. Thus, we show that treating molecules as dynamic entities improves the performance of structure-based function prediction methods. PMID:19604472

  6. Sensing Landscape History with an Interactive Location Based Service

    PubMed Central

    van Lammeren, Ron; Goossen, Martin; Roncken, Paul

    2009-01-01

    This paper introduces the STEAD approach for interpreting data acquired by a “human sensor”, who uses an informal interactive location-based service (iLBS) to sense cultural-historic facts and anecdotes of, and in the landscape. This user-generated data is collected outdoors and in situ. The approach consists of four related facets (who, what, where, when). Three of the four facets are discussed and illustrated by user generated data collected during a Dutch survey in 2008. These data represent the personal cultural-historic knowledge and anecdotes of 150 people using a customized iLBS for experiencing the cultural history of a landscape. The “who” facet shows three dominant mentality groups (cosmopolitans, modern materialists and post modern hedonists) that generated user content. The “what” facet focuses on three subject types of pictures and four picture framing classes. Pictures of the place type showed to be dominant and foreground framing class was slightly favourite. The “where” facet is explored via density, distribution, and distance of the pictures made. The illustrations of the facets indirectly show the role of the “human sensor” with respect to the domain of interest. The STEAD approach needs further development of the when-facet and of the relations between the four facets. Finally the results of the approach may support data archives of iLBS applications. PMID:22399994

  7. Image processing and applications based on visualizing navigation service

    NASA Astrophysics Data System (ADS)

    Hwang, Chyi-Wen

    2015-07-01

    When facing the "overabundant" of semantic web information, in this paper, the researcher proposes the hierarchical classification and visualizing RIA (Rich Internet Application) navigation system: Concept Map (CM) + Semantic Structure (SS) + the Knowledge on Demand (KOD) service. The aim of the Multimedia processing and empirical applications testing, was to investigating the utility and usability of this visualizing navigation strategy in web communication design, into whether it enables the user to retrieve and construct their personal knowledge or not. Furthermore, based on the segment markets theory in the Marketing model, to propose a User Interface (UI) classification strategy and formulate a set of hypermedia design principles for further UI strategy and e-learning resources in semantic web communication. These research findings: (1) Irrespective of whether the simple declarative knowledge or the complex declarative knowledge model is used, the "CM + SS + KOD navigation system" has a better cognition effect than the "Non CM + SS + KOD navigation system". However, for the" No web design experience user", the navigation system does not have an obvious cognition effect. (2) The essential of classification in semantic web communication design: Different groups of user have a diversity of preference needs and different cognitive styles in the CM + SS + KOD navigation system.

  8. Sensing landscape history with an interactive location based service.

    PubMed

    van Lammeren, Ron; Goossen, Martin; Roncken, Paul

    2009-01-01

    This paper introduces the STEAD approach for interpreting data acquired by a "human sensor", who uses an informal interactive location-based service (iLBS) to sense cultural-historic facts and anecdotes of, and in the landscape. This user-generated data is collected outdoors and in situ. The approach consists of four related facets (who, what, where, when). Three of the four facets are discussed and illustrated by user generated data collected during a Dutch survey in 2008. These data represent the personal cultural-historic knowledge and anecdotes of 150 people using a customized iLBS for experiencing the cultural history of a landscape. The "who" facet shows three dominant mentality groups (cosmopolitans, modern materialists and post modern hedonists) that generated user content. The "what" facet focuses on three subject types of pictures and four picture framing classes. Pictures of the place type showed to be dominant and foreground framing class was slightly favourite. The "where" facet is explored via density, distribution, and distance of the pictures made. The illustrations of the facets indirectly show the role of the "human sensor" with respect to the domain of interest. The STEAD approach needs further development of the when-facet and of the relations between the four facets. Finally the results of the approach may support data archives of iLBS applications.

  9. Building Community Capacity through School-Based Service-Learning

    ERIC Educational Resources Information Center

    Jacobus, Michelle Vazquez; Baskett, Robert

    2010-01-01

    This article describes the opportunities and challenges encountered in the service-learning adaptation of an early childhood primary prevention program through the University of Southern Maine's Lewiston Auburn College. In the face of economic and social challenges confronted by many communities, service-learning models are proposed as essential…

  10. Military Base Closures and Affected Defense Department Civil Service Employees

    DTIC Science & Technology

    2006-03-07

    5 Voluntary Early Retirement Authority (VERA) . . . . . . . . . . . . . . . . . . . . . . 5 Voluntary Separation Incentive Payments (VSIPs...be eligible for transition assistance. Voluntary Early Retirement Authority (VERA) Employees who are at least 50 years of age with at least 20 years...of creditable service (or 25 years of service at any age) may be eligible for early retirement . These requirements apply to individuals covered by

  11. Architecture-Based Reliability Analysis of Web Services

    ERIC Educational Resources Information Center

    Rahmani, Cobra Mariam

    2012-01-01

    In a Service Oriented Architecture (SOA), the hierarchical complexity of Web Services (WS) and their interactions with the underlying Application Server (AS) create new challenges in providing a realistic estimate of WS performance and reliability. The current approaches often treat the entire WS environment as a black-box. Thus, the sensitivity…

  12. The Development of Behaviorally Based Public School Consultation Services

    ERIC Educational Resources Information Center

    Putnam, Robert F.; Handler, Marcie W.; Rey, Jannette; McCarty, Joseph

    2005-01-01

    This article describes the development of behavioral school care consultation services to public schools within a not-for-profit community behavioral health organization. An overview of the process of behavior consultation is presented. A description of the growth of behavioral school consultation services is outlined in regard to (a) the types of…

  13. Facing uncertainty in ecosystem services-based resource management.

    PubMed

    Grêt-Regamey, Adrienne; Brunner, Sibyl H; Altwegg, Jürg; Bebi, Peter

    2013-09-01

    The concept of ecosystem services is increasingly used as a support for natural resource management decisions. While the science for assessing ecosystem services is improving, appropriate methods to address uncertainties in a quantitative manner are missing. Ignoring parameter uncertainties, modeling uncertainties and uncertainties related to human-environment interactions can modify decisions and lead to overlooking important management possibilities. In this contribution, we present a new approach for mapping the uncertainties in the assessment of multiple ecosystem services. The spatially explicit risk approach links Bayesian networks to a Geographic Information System for forecasting the value of a bundle of ecosystem services and quantifies the uncertainties related to the outcomes in a spatially explicit manner. We demonstrate that mapping uncertainties in ecosystem services assessments provides key information for decision-makers seeking critical areas in the delivery of ecosystem services in a case study in the Swiss Alps. The results suggest that not only the total value of the bundle of ecosystem services is highly dependent on uncertainties, but the spatial pattern of the ecosystem services values changes substantially when considering uncertainties. This is particularly important for the long-term management of mountain forest ecosystems, which have long rotation stands and are highly sensitive to pressing climate and socio-economic changes.

  14. An Approach for Web Service Selection Based on Confidence Level of Decision Maker

    PubMed Central

    Khezrian, Mojtaba; Jahan, Ali; Wan Kadir, Wan Mohd Nasir; Ibrahim, Suhaimi

    2014-01-01

    Web services today are among the most widely used groups for Service Oriented Architecture (SOA). Service selection is one of the most significant current discussions in SOA, which evaluates discovered services and chooses the best candidate from them. Although a majority of service selection techniques apply Quality of Service (QoS), the behaviour of QoS-based service selection leads to service selection problems in Multi-Criteria Decision Making (MCDM). In the existing works, the confidence level of decision makers is neglected and does not consider their expertise in assessing Web services. In this paper, we employ the VIKOR (VIšekriterijumskoKOmpromisnoRangiranje) method, which is absent in the literature for service selection, but is well-known in other research. We propose a QoS-based approach that deals with service selection by applying VIKOR with improvement of features. This research determines the weights of criteria based on user preference and accounts for the confidence level of decision makers. The proposed approach is illustrated by an example in order to demonstrate and validate the model. The results of this research may facilitate service consumers to attain a more efficient decision when selecting the appropriate service. PMID:24897426

  15. Dynamic Strategic Planning in a Professional Knowledge-Based Organization

    ERIC Educational Resources Information Center

    Olivarius, Niels de Fine; Kousgaard, Marius Brostrom; Reventlow, Susanne; Quelle, Dan Grevelund; Tulinius, Charlotte

    2010-01-01

    Professional, knowledge-based institutions have a particular form of organization and culture that makes special demands on the strategic planning supervised by research administrators and managers. A model for dynamic strategic planning based on a pragmatic utilization of the multitude of strategy models was used in a small university-affiliated…

  16. Host Amplification in a Dithioacetal-Based Dynamic Covalent Library.

    PubMed

    Orrillo, A Gastón; Escalante, Andrea M; Furlan, Ricardo L E

    2017-03-06

    Molecular amplification in a dithioacetal-based dynamic library is described for the first time. The homatropine induced selection, amplification, and isolation of one cyclophane host demonstrates the utility of dithioacetal exchange for preparing responsive dynamic libraries. Nuclear magnetic resonance and isothermal titration calorimetry analysis suggest that the amplified macrocycle forms a 1:1 complex with the template. This is the first report about a host/guest system involving a dithioacetal cyclophane.

  17. NURSE EDUCATOR PERCEPTIONS OF FAITH-BASED ORGANIZATIONS FOR SERVICE-LEARNING.

    PubMed

    Fountain, Rebecca Power; Toone, Amy R; Deal, Belinda J

    2016-01-01

    Knowledge about service-learning for nursing students in faith-based organizations (FBOs) is limited. This descriptive study explored the perceptions of nurse educators about using FBOs for service-learning clinical sites. Participants (N = 112) relayed specific benefits and barriers to using FBOs for service-learning clinical experiences. Recommendations are made for effective school-FBO partnerships.

  18. Motivational Factors for School-Based Teacher Learning: Turkish Pre-Service Teachers' Experiences and Expectations

    ERIC Educational Resources Information Center

    Eryilmaz, Ali; Aypay, Ahmet

    2016-01-01

    The purpose of this study is to describe the motivational factors of pre-service teachers' school-based learning. The study group comprised of 99 pre-service teachers in Eskisehir, Turkey. 53 of them (19 males and 34 females) were history teachers; and 46 of them (25 males and 22 females) were mathematics pre-service teachers. Data was collected…

  19. Difficulties in Field-Based Observation among Pre-Service Teachers: Implications to Practice Teaching

    ERIC Educational Resources Information Center

    Abas, Maripaz C.

    2016-01-01

    Field-based observation has long been a central part of pre-service teacher education in many countries and is crucial for implementing effective practicum of pre-service teachers. This paper focused on the perspectives of graduating pre-service teachers regarding their difficulties related to administrative support, cooperating teachers, student…

  20. Oregon School-Based Health Centers, 1992-1994 Services Report.

    ERIC Educational Resources Information Center

    Nystrom, Robert J.

    This report describes the activities of Oregon's 25 high school-based health centers between 1992 and 1994. Information is provided on funding sources, services offered (including general medical services and reproductive health, mental health, health promotion services, and hours of operation), staffing (including levels of staffing and…

  1. Examination of Pre-Service Science Teachers' Activities Using Problem Based Learning Method

    ERIC Educational Resources Information Center

    Ekici, Didem Inel

    2016-01-01

    In this study, both the activities prepared by pre-service science teachers regarding the Problem Based Learning method and the pre-service science teachers' views regarding the method were examined before and after applying their activities in a real class environment. 69 pre-service science teachers studying in the 4th grade of the science…

  2. Dynamic gold nanoparticle, polymer-based composites

    NASA Astrophysics Data System (ADS)

    Firestone, Millicent; Junghans, Ann; Hayden, Steven; Majeski, Jaroslaw; CINT, Lujan Team

    2014-03-01

    Artificial polymer-based biomembranes may serve as a foundational architecture for the integration and spatial organization of metal nanoparticles forming functional nanocomposites. Nonionic triblock copolymer (PEO-PPO-PEO), lipid-based gels, containing Au nanoparticles (NPs) can be prepared by either external doping of the preformed nanoparticles or by in-situ reduction of Au 3+. Neutron reflectivity on quartz supported thin films of the Au NP -doped polymer-based biomembranes was used to determine the location of the Au. The nanoparticles were found to preferentially reside within the ethylene oxide chains located at the interface of the bulk water channels and the amphiphile bilayers. The embedded Au nanoparticles can act as localized heat sinks, inducing changes in the polymer conformation. The collective, thermally-triggered expansion and contraction of the EO chains modulate the mesophase structure of the gels. Synchrotron X-ray scattering (SAXS) was used to monitor mesophase structure as a function of both temperature and photo-irradiation. These studies represent a first step towards designingexternally-responsive polymer-nanoparticle composites.

  3. A Cumulant-based Analysis of Nonlinear Magnetospheric Dynamics

    SciTech Connect

    Jay R. Johnson; Simon Wing

    2004-01-28

    Understanding magnetospheric dynamics and predicting future behavior of the magnetosphere is of great practical interest because it could potentially help to avert catastrophic loss of power and communications. In order to build good predictive models it is necessary to understand the most critical nonlinear dependencies among observed plasma and electromagnetic field variables in the coupled solar wind/magnetosphere system. In this work, we apply a cumulant-based information dynamical measure to characterize the nonlinear dynamics underlying the time evolution of the Dst and Kp geomagnetic indices, given solar wind magnetic field and plasma input. We examine the underlying dynamics of the system, the temporal statistical dependencies, the degree of nonlinearity, and the rate of information loss. We find a significant solar cycle dependence in the underlying dynamics of the system with greater nonlinearity for solar minimum. The cumulant-based approach also has the advantage that it is reliable even in the case of small data sets and therefore it is possible to avoid the assumption of stationarity, which allows for a measure of predictability even when the underlying system dynamics may change character. Evaluations of several leading Kp prediction models indicate that their performances are sub-optimal during active times. We discuss possible improvements of these models based on this nonparametric approach.

  4. Mobile phone middleware architecture for energy and context awareness in location-based services.

    PubMed

    Galeana-Zapién, Hiram; Torres-Huitzil, César; Rubio-Loyola, Javier

    2014-12-10

    The disruptive innovation of smartphone technology has enabled the development of mobile sensing applications leveraged on specialized sensors embedded in the device. These novel mobile phone applications rely on advanced sensor information processes, which mainly involve raw data acquisition, feature extraction, data interpretation and transmission. However, the continuous accessing of sensing resources to acquire sensor data in smartphones is still very expensive in terms of energy, particularly due to the periodic use of power-intensive sensors, such as the Global Positioning System (GPS) receiver. The key underlying idea to design energy-efficient schemes is to control the duty cycle of the GPS receiver. However, adapting the sensing rate based on dynamic context changes through a flexible middleware has received little attention in the literature. In this paper, we propose a novel modular middleware architecture and runtime environment to directly interface with application programming interfaces (APIs) and embedded sensors in order to manage the duty cycle process based on energy and context aspects. The proposed solution has been implemented in the Android software stack. It allows continuous location tracking in a timely manner and in a transparent way to the user. It also enables the deployment of sensing policies to appropriately control the sampling rate based on both energy and perceived context. We validate the proposed solution taking into account a reference location-based service (LBS) architecture. A cloud-based storage service along with online mobility analysis tools have been used to store and access sensed data. Experimental measurements demonstrate the feasibility and efficiency of our middleware, in terms of energy and location resolution.

  5. 26 CFR 1.954-4 - Foreign base company services income.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 10 2010-04-01 2010-04-01 false Foreign base company services income. 1.954-4... TAX (CONTINUED) INCOME TAXES Controlled Foreign Corporations § 1.954-4 Foreign base company services income. (a) Items included. Except as provided in paragraph (d) of this section, foreign base...

  6. EnviroAtlas - Ecosystem Services Market-Based Programs Web Service, U.S., 2016, Forest Trends' Ecosystem Marketplace

    EPA Pesticide Factsheets

    This EnviroAtlas web service contains layers depicting market-based programs and projects addressing ecosystem services protection in the United States. Layers include data collected via surveys and desk research conducted by Forest Trends' Ecosystem Marketplace from 2008 to 2016 on biodiversity (i.e., imperiled species/habitats; wetlands and streams), carbon, and water markets and enabling conditions that facilitate, directly or indirectly, market-based approaches to protecting and investing in those ecosystem services. This dataset was produced by Forest Trends' Ecosystem Marketplace for EnviroAtlas in order to support public access to and use of information related to environmental markets. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

  7. iRODS-Based Climate Data Services and Virtualization-as-a-Service in the NASA Center for Climate Simulation

    NASA Astrophysics Data System (ADS)

    Schnase, J. L.; Duffy, D. Q.; Tamkin, G. S.; Strong, S.; Ripley, D.; Gill, R.; Sinno, S. S.; Shen, Y.; Carriere, L. E.; Brieger, L.; Moore, R.; Rajasekar, A.; Schroeder, W.; Wan, M.

    2011-12-01

    Scientific data services are becoming an important part of the NASA Center for Climate Simulation's mission. Our technological response to this expanding role is built around the concept of specialized virtual climate data servers, repetitive cloud provisioning, image-based deployment and distribution, and virtualization-as-a-service. A virtual climate data server is an OAIS-compliant, iRODS-based data server designed to support a particular type of scientific data collection. iRODS is data grid middleware that provides policy-based control over collection-building, managing, querying, accessing, and preserving large scientific data sets. We have developed prototype vCDSs to manage NetCDF, HDF, and GeoTIF data products. We use RPM scripts to build vCDS images in our local computing environment, our local Virtual Machine Environment, NASA's Nebula Cloud Services, and Amazon's Elastic Compute Cloud. Once provisioned into these virtualized resources, multiple vCDSs can use iRODS's federation and realized object capabilities to create an integrated ecosystem of data servers that can scale and adapt to changing requirements. This approach enables platform- or software-as-a-service deployment of the vCDSs and allows the NCCS to offer virtualization-as-a-service, a capacity to respond in an agile way to new customer requests for data services, and a path for migrating existing services into the cloud. We have registered MODIS Atmosphere data products in a vCDS that contains 54 million registered files, 630TB of data, and over 300 million metadata values. We are now assembling IPCC AR5 data into a production vCDS that will provide the platform upon which NCCS's Earth System Grid (ESG) node publishes to the extended science community. In this talk, we describe our approach, experiences, lessons learned, and plans for the future.

  8. CEMS: Building a Cloud-Based Infrastructure to Support Climate and Environmental Data Services

    NASA Astrophysics Data System (ADS)

    Kershaw, P. J.; Curtis, M.; Pechorro, E.

    2012-04-01

    CEMS, the facility for Climate and Environmental Monitoring from Space, is a new joint collaboration between academia and industry to bring together their collective expertise to support research into climate change and provide a catalyst for growth in related Earth Observation (EO) technologies and services in the commercial sector. A recent major investment by the UK Space Agency has made possible the development of a dedicated facility at ISIC, the International Space Innovation Centre at Harwell in the UK. CEMS has a number of key elements: the provision of access to large-volume EO and climate datasets co-located with high performance computing facilities; a flexible infrastructure to support the needs of research projects in the academic community and new business opportunities for commercial companies. Expertise and tools for scientific data quality and integrity are another essential component, giving users confidence and transparency in its data, services and products. Central to the development of this infrastructure is the utilisation of cloud-based technology: multi-tenancy and the dynamic provision of resources are key characteristics to exploit in order to support the range of organisations using the facilities and the varied use cases. The hosting of processing services and applications next to the data within the CEMS facility is another important capability. With the expected exponential increase in data volumes within the climate science and EO domains it is becoming increasingly impracticable for organisations to retrieve this data over networks and provide the necessary storage. Consider for example, the factor of o20 increase in data volumes expected for the ESA Sentinel missions over the equivalent Envisat instruments. We explore the options for the provision of a hybrid community/private cloud looking at offerings from the commercial sector and developments in the Open Source community. Building on this virtualisation layer, a further core

  9. Sustainable development level evaluation based on ecosystem services welfare index

    NASA Astrophysics Data System (ADS)

    Zhu, W.; Shi, Z.

    2015-12-01

    Rapidly economic development makes global ecosystem degradation and ecosystem services descent, which aroused people's concern increasingly. A serious of disastrous weather such as sandstorm, haze, and floods become the focus of public. Take an example of the impact on natural ecosystems, firstly, human are over-dependence on the supply services provided by ecosystem, especially the grain, fibers, forest and so on, resulting other ecosystem services decline. Secondly, the raising artificial ecosystems lead to the simplification of system structure and function. End up with environment pollution and habitat fragmentation, which endanger human well-being. Ecosystem Services Welfare Index was introduced into this study. Evaluating the sustainable development level of regional ecology and society by calculating the efficiency of per unit ecosystem services consumption contributes to the human welfare. Welfare is the degree of human satisfaction, including not only the economic level, but also the education, health, and housing. This study will select the human development index (HDI) as the representation of human welfare, and ecosystem services footprint index (ESFI) presenting the ecosystem services consumption. According the results, 31 province in China could be divided into several different type, "high development- low efficiency- high consumption", "low development - high efficiency- low consumption" and "low development- high efficiency- low consumption", which could be evidence for decision makers.

  10. Service development of a nurse-led community-based PICC insertion service.

    PubMed

    Bedford, Eva; Waterhouse, Dee

    2017-01-26

    Patients receiving intravenous therapy require reliable venous access. Typically patients with poor peripheral access or requiring long-term treatment from an outpatient antibiotic therapy (OPAT) service need to receive secondary care input for safe central line placement, and radiological confirmation of the correct line tip placement where necessary, if treatment is to proceed as planned. Technological developments that enable accurate ultrasound-guided vein selection and electrocardiograph (ECG)-guided central line tip placement have eliminated the need for radiological or fluoroscopic confirmation of correct tip placement for peripherally placed central catheters (PICCs). This article outlines the development of an out-of-hospital nurse-led PICC insertion service using the Sherlock 3CG(®) Tip Confirmation System (C.R Bard) to meet the needs of patients requiring long-term intravenous treatment from an OPAT service, and its impact on reducing treatment delays and the need for secondary care intervention.

  11. A conceptual model of public medical service system based-on cell phone mobile platform

    NASA Astrophysics Data System (ADS)

    Fu, Hongjiao; Zhao, Yue

    In recent years, cell phones have played an increasingly important role in rapidly-developing global telecommunication services. At present, mobile business develops very fast. However, the development in other mobile service fields, such as public service, mobile medical service, etc, is still in its infant stage. Drawing on the experience of the 'doctor workstation project' which is cooperated by Renmin University of China and Norway Fredskorps Corporation, this paper discusses the research and implementation of the Doctor Workstation System based on cell phone mobile platform. From the practice of the Doctor Workstation System, the paper advances a conceptual model of public medical service system based-on cell phone mobile platform.

  12. Carrier-based delivery mechanism for enhanced services on passive optical networks

    NASA Astrophysics Data System (ADS)

    Compton, Mark K.; Rosher, Paul A.

    1992-02-01

    Passive optical networking is being considered for the provision of digital services in the local loop. In the UK, TPON is under investigation for the delivery of telephony and other narrowband services. This paper describes a carrier based system which is being considered as a short term overlay to TPON. Both broadband and narrowband services may be supported, representing an evolutionary path to the provision of integrated services for the information intensive customer.

  13. Personalized Location-Based Recommendation Services for Tour Planning in Mobile Tourism Applications

    NASA Astrophysics Data System (ADS)

    Yu, Chien-Chih; Chang, Hsiao-Ping

    Travel and tour planning is a process of searching, selecting, grouping and sequencing destination related products and services including attractions, accommodations, restaurants, and activities. Personalized recommendation services aim at suggesting products and services to meet users’ preferences and needs, while location-based services focus on providing information based on users’ current positions. Due to the fast growing of user needs in the mobile tourism domain, how to provide personalized location-based tour recommendation services becomes a critical research and practical issue. The objective of this paper is to propose a system architecture and design methods for facilitating the delivery of location-based recommendation services to support personalized tour planning. Based on tourists’ current location and time, as well as personal preferences and needs, various recommendations regarding sightseeing spots, hotels, restaurants, and packaged tour plans can be generated efficiently. An application prototype is also implemented to illustrate and test the system feasibility and effectiveness.

  14. Differentiated protection services with failure probability guarantee for workflow-based applications

    NASA Astrophysics Data System (ADS)

    Zhong, Yaoquan; Guo, Wei; Jin, Yaohui; Sun, Weiqiang; Hu, Weisheng

    2010-12-01

    A cost-effective and service-differentiated provisioning strategy is very desirable to service providers so that they can offer users satisfactory services, while optimizing network resource allocation. Providing differentiated protection services to connections for surviving link failure has been extensively studied in recent years. However, the differentiated protection services for workflow-based applications, which consist of many interdependent tasks, have scarcely been studied. This paper investigates the problem of providing differentiated services for workflow-based applications in optical grid. In this paper, we develop three differentiated protection services provisioning strategies which can provide security level guarantee and network-resource optimization for workflow-based applications. The simulation demonstrates that these heuristic algorithms provide protection cost-effectively while satisfying the applications' failure probability requirements.

  15. Performance evaluation of data center service localization based on virtual resource migration in software defined elastic optical network.

    PubMed

    Yang, Hui; Zhang, Jie; Ji, Yuefeng; Tan, Yuanlong; Lin, Yi; Han, Jianrui; Lee, Young

    2015-09-07

    Data center interconnection with elastic optical network is a promising scenario to meet the high burstiness and high-bandwidth requirements of data center services. In our previous work, we implemented cross stratum optimization of optical network and application stratums resources that allows to accommodate data center services. In view of this, this study extends the data center resources to user side to enhance the end-to-end quality of service. We propose a novel data center service localization (DCSL) architecture based on virtual resource migration in software defined elastic data center optical network. A migration evaluation scheme (MES) is introduced for DCSL based on the proposed architecture. The DCSL can enhance the responsiveness to the dynamic end-to-end data center demands, and effectively reduce the blocking probability to globally optimize optical network and application resources. The overall feasibility and efficiency of the proposed architecture are experimentally verified on the control plane of our OpenFlow-based enhanced SDN testbed. The performance of MES scheme under heavy traffic load scenario is also quantitatively evaluated based on DCSL architecture in terms of path blocking probability, provisioning latency and resource utilization, compared with other provisioning scheme.

  16. IPTV based on IP network and streaming media service station

    NASA Astrophysics Data System (ADS)

    Sun, Jifeng; Gao, Songbo

    2007-11-01

    IPTV can be a new service performed on the Internet in that network transmission and streaming media technologies are getting mature. In this paper, IPTV system infrastructure of UTStarcom, key technologies deployed, and applications will be discussed and evaluated. The key technologies to achieve IPTV services include 1) codec and compression; 2) streaming media; and 3) broadband networks and access to such networks. The implementation of Media Switch IPTV system in Harbin CNC city network is also discussed.

  17. An Individual-Based Model of Zebrafish Population Dynamics Accounting for Energy Dynamics

    PubMed Central

    Beaudouin, Rémy; Goussen, Benoit; Piccini, Benjamin; Augustine, Starrlight; Devillers, James; Brion, François; Péry, Alexandre R. R.

    2015-01-01

    Developing population dynamics models for zebrafish is crucial in order to extrapolate from toxicity data measured at the organism level to biological levels relevant to support and enhance ecological risk assessment. To achieve this, a dynamic energy budget for individual zebrafish (DEB model) was coupled to an individual based model of zebrafish population dynamics (IBM model). Next, we fitted the DEB model to new experimental data on zebrafish growth and reproduction thus improving existing models. We further analysed the DEB-model and DEB-IBM using a sensitivity analysis. Finally, the predictions of the DEB-IBM were compared to existing observations on natural zebrafish populations and the predicted population dynamics are realistic. While our zebrafish DEB-IBM model can still be improved by acquiring new experimental data on the most uncertain processes (e.g. survival or feeding), it can already serve to predict the impact of compounds at the population level. PMID:25938409

  18. Ethernet-Based Services for Next Generation Networks

    NASA Astrophysics Data System (ADS)

    Hernandez-Valencia, Enrique

    Over the last few years, Ethernet technology and services have emerged as an indispensable component of the broadband networking and telecommunications infrastructure, both for network operators and service providers. As an example, Worldwide Enterprise customer demand for Ethernet services by itself is expected to hit the 30B US mark by year 2012. Use of Ethernet technology in the feeder networks that support residential applications, such as "triple play" voice, data, and video services, is equally on the rise. As the synergies between packet-aware transport and service oriented equipment continue to be exploited in the path toward transport convergence. Ethernet technology is expected to play a critical part in the evolution toward converged Optical/Packet Transport networks. Here we discuss the main business motivations, services, and technologies driving the specifications of so-called carrier Ethernet and highlight challenges associated with delivering the expectations for low implementation complexity, easy of use, provisioning and management of networks and network elements embracing this technology.

  19. Standards-Based Curriculum Development for Pre-Service and In-Service: A "Partnering" Approach Using Modified Backwards Design

    ERIC Educational Resources Information Center

    Shumway, Steve; Berrett, Jared

    2004-01-01

    Technology teacher educators across the nation are considering what changes will be made to their pre-service teacher education programs to implement the standards in Standards for Technological Literacy (STL) (ITEA, 2000/2002) and to help future teachers learn to develop and teach curriculum that is based on those standards (Custer & Wright,…

  20. [Spatio-temporal dynamics of ecosystem service value in Wuhan Urban Agglomeration].

    PubMed

    Zeng, Jie; Li, Jiang-Feng; Yao, Xiao-Wei

    2014-03-01

    Based on the land use vector data of Wuhan Urban Agglomeration in the years 1990, 2000 and 2009, this paper used Costanza' s evaluation formula to estimate the ecosystem service value (ESV) of the study area according to "equivalent value per unit area of ecosystem services in China" and analyze its spatio-temporal characteristics. Then the correlation analysis was applied to explore the association between the ESV evolution and the land use changes. The results showed that due to the substantial growth of water area, the ESV of Wuhan Urban Agglomeration increased by 9.5% during the study period, which showed an overall rising trend. The ESV of water regulation and waste treatment increased obviously. Furthermore, the ESV changes showed obvious regional differences, which were most significant in Xiantao, Xinzhou and Yunmeng. The ESV was higher in the southeast and lower in the northwest. Over time, a Wuhan-centered "low-high-low" hierarchically distributed structure of ESV was formed in the eastern, western and northern parts. The ecologic dominance of the northern mountainous and hilly region was gradually abated, while a structural expansion with a high-ESV cluster had taken place in the southern part of the region in 2009. During the research period, the temporal change of ESV in Wuhan Urban Agglomeration was positively correlated with the area changes of forestland, water, grassland and cultivated land. However, the spatially balanced distribution of ESV was negatively correlated with the dispersion degrees of the cultivated land and unused land.

  1. Translating Evidence-Based Depression Management Services to Community-Based Primary Care Practices

    PubMed Central

    Kilbourne, Amy M; Schulberg, Herbert C; Post, Edward P; Rollman, Bruce L; Belnap, Bea Herbeck; Pincus, Harold Alan

    2004-01-01

    Randomized controlled trials have demonstrated the efficacy and cost-effectiveness of using treatment models for major depression in primary care settings. Nonetheless, translating these models into enduring changes in routine primary care has proved difficult. Various health system and organizational barriers prevent the integration of these models into primary care settings. This article discusses barriers to introducing and sustaining evidence-based depression management services in community-based primary care practices and suggests organizational and financial solutions based on the Robert Wood Johnson Foundation Depression in Primary Care Program. It focuses on strategies to improve depression care in medical settings based on adaptations of the chronic care model and discusses the challenges of implementing evidence-based depression care given the structural, financial, and cultural separation between mental health and general medical care. PMID:15595945

  2. Perspective: a dynamics-based classification of ventricular arrhythmias.

    PubMed

    Weiss, James N; Garfinkel, Alan; Karagueuzian, Hrayr S; Nguyen, Thao P; Olcese, Riccardo; Chen, Peng-Sheng; Qu, Zhilin

    2015-05-01

    Despite key advances in the clinical management of life-threatening ventricular arrhythmias, culminating with the development of implantable cardioverter-defibrillators and catheter ablation techniques, pharmacologic/biologic therapeutics have lagged behind. The fundamental issue is that biological targets are molecular factors. Diseases, however, represent emergent properties at the scale of the organism that result from dynamic interactions between multiple constantly changing molecular factors. For a pharmacologic/biologic therapy to be effective, it must target the dynamic processes that underlie the disease. Here we propose a classification of ventricular arrhythmias that is based on our current understanding of the dynamics occurring at the subcellular, cellular, tissue and organism scales, which cause arrhythmias by simultaneously generating arrhythmia triggers and exacerbating tissue vulnerability. The goal is to create a framework that systematically links these key dynamic factors together with fixed factors (structural and electrophysiological heterogeneity) synergistically promoting electrical dispersion and increased arrhythmia risk to molecular factors that can serve as biological targets. We classify ventricular arrhythmias into three primary dynamic categories related generally to unstable Ca cycling, reduced repolarization, and excess repolarization, respectively. The clinical syndromes, arrhythmia mechanisms, dynamic factors and what is known about their molecular counterparts are discussed. Based on this framework, we propose a computational-experimental strategy for exploring the links between molecular factors, fixed factors and dynamic factors that underlie life-threatening ventricular arrhythmias. The ultimate objective is to facilitate drug development by creating an in silico platform to evaluate and predict comprehensively how molecular interventions affect not only a single targeted arrhythmia, but all primary arrhythmia dynamics

  3. An automated and integrated framework for dust storm detection based on ogc web processing services

    NASA Astrophysics Data System (ADS)

    Xiao, F.; Shea, G. Y. K.; Wong, M. S.; Campbell, J.

    2014-11-01

    Dust storms are known to have adverse effects on public health. Atmospheric dust loading is also one of the major uncertainties in global climatic modelling as it is known to have a significant impact on the radiation budget and atmospheric stability. The complexity of building scientific dust storm models is coupled with the scientific computation advancement, ongoing computing platform development, and the development of heterogeneous Earth Observation (EO) networks. It is a challenging task to develop an integrated and automated scheme for dust storm detection that combines Geo-Processing frameworks, scientific models and EO data together to enable the dust storm detection and tracking processes in a dynamic and timely manner. This study develops an automated and integrated framework for dust storm detection and tracking based on the Web Processing Services (WPS) initiated by Open Geospatial Consortium (OGC). The presented WPS framework consists of EO data retrieval components, dust storm detecting and tracking component, and service chain orchestration engine. The EO data processing component is implemented based on OPeNDAP standard. The dust storm detecting and tracking component combines three earth scientific models, which are SBDART model (for computing aerosol optical depth (AOT) of dust particles), WRF model (for simulating meteorological parameters) and HYSPLIT model (for simulating the dust storm transport processes). The service chain orchestration engine is implemented based on Business Process Execution Language for Web Service (BPEL4WS) using open-source software. The output results, including horizontal and vertical AOT distribution of dust particles as well as their transport paths, were represented using KML/XML and displayed in Google Earth. A serious dust storm, which occurred over East Asia from 26 to 28 Apr 2012, is used to test the applicability of the proposed WPS framework. Our aim here is to solve a specific instance of a complex EO data

  4. NaradaBrokering as Middleware Fabric for Grid-based Remote Visualization Services

    NASA Astrophysics Data System (ADS)

    Pallickara, S.; Erlebacher, G.; Yuen, D.; Fox, G.; Pierce, M.

    2003-12-01

    Remote Visualization Services (RVS) have tended to rely on approaches based on the client server paradigm. The simplicity in these approaches is offset by problems such as single-point-of-failures, scaling and availability. Furthermore, as the complexity, scale and scope of the services hosted on this paradigm increase, this approach becomes increasingly unsuitable. We propose a scheme based on top of a distributed brokering infrastructure, NaradaBrokering, which comprises a distributed network of broker nodes. These broker nodes are organized in a cluster-based architecture that can scale to very large sizes. The broker network is resilient to broker failures and efficiently routes interactions to entities that expressed an interest in them. In our approach to RVS, services advertise their capabilities to the broker network, which manages these service advertisements. Among the services considered within our system are those that perform graphic transformations, mediate access to specialized datasets and finally those that manage the execution of specified tasks. There could be multiple instances of each of these services and the system ensures that load for a given service is distributed efficiently over these service instances. Among the features provided in our approach are efficient discovery of services and asynchronous interactions between services and service requestors (which could themselves be other services). Entities need not be online during the execution of the service request. The system also ensures that entities can be notified about task executions, partial results and failures that might have taken place during service execution. The system also facilitates specification of task overrides, distribution of execution results to alternate devices (which were not used to originally request service execution) and to multiple users. These RVS services could of course be either OGSA (Open Grid Services Architecture) based Grid services or traditional

  5. Semantic Agent-Based Service Middleware and Simulation for Smart Cities.

    PubMed

    Liu, Ming; Xu, Yang; Hu, Haixiao; Mohammed, Abdul-Wahid

    2016-12-21

    With the development of Machine-to-Machine (M2M) technology, a variety of embedded and mobile devices is integrated to interact via the platform of the Internet of Things, especially in the domain of smart cities. One of the primary challenges is that selecting the appropriate services or service combination for upper layer applications is hard, which is due to the absence of a unified semantical service description pattern, as well as the service selection mechanism. In this paper, we define a semantic service representation model from four key properties: Capability (C), Deployment (D), Resource (R) and IOData (IO). Based on this model, an agent-based middleware is built to support semantic service enablement. In this middleware, we present an efficient semantic service discovery and matching approach for a service combination process, which calculates the semantic similarity between services, and a heuristic algorithm to search the service candidates for a specific service request. Based on this design, we propose a simulation of virtual urban fire fighting, and the experimental results manifest the feasibility and efficiency of our design.

  6. Semantic Agent-Based Service Middleware and Simulation for Smart Cities

    PubMed Central

    Liu, Ming; Xu, Yang; Hu, Haixiao; Mohammed, Abdul-Wahid

    2016-01-01

    With the development of Machine-to-Machine (M2M) technology, a variety of embedded and mobile devices is integrated to interact via the platform of the Internet of Things, especially in the domain of smart cities. One of the primary challenges is that selecting the appropriate services or service combination for upper layer applications is hard, which is due to the absence of a unified semantical service description pattern, as well as the service selection mechanism. In this paper, we define a semantic service representation model from four key properties: Capability (C), Deployment (D), Resource (R) and IOData (IO). Based on this model, an agent-based middleware is built to support semantic service enablement. In this middleware, we present an efficient semantic service discovery and matching approach for a service combination process, which calculates the semantic similarity between services, and a heuristic algorithm to search the service candidates for a specific service request. Based on this design, we propose a simulation of virtual urban fire fighting, and the experimental results manifest the feasibility and efficiency of our design. PMID:28009818

  7. Dynamic gesture recognition based on multiple sensors fusion technology.

    PubMed

    Wenhui, Wang; Xiang, Chen; Kongqiao, Wang; Xu, Zhang; Jihai, Yang

    2009-01-01

    This paper investigates the roles of a three-axis accelerometer, surface electromyography sensors and a webcam for dynamic gesture recognition. A decision-level multiple sensor fusion method based on action elements is proposed to distinguish a set of 20 kinds of dynamic hand gestures. Experiments are designed and conducted to collect three kinds of sensor data stream simultaneously during gesture implementation and compare the performance of different subsets in gesture recognition. Experimental results from three subjects show that the combination of three kinds of sensor achieves recognition accuracies at 87.5%-91.8%, which are higher largely than that of the single sensor conditions. This study is valuable to realize continuous and dynamic gesture recognition based on multiple sensor fusion technology for multi-model interaction.

  8. Molecular Dynamics Simulations of Perylenediimide DNA Base Surrogates.

    PubMed

    Markegard, Cade B; Mazaheripour, Amir; Jocson, Jonah-Micah; Burke, Anthony M; Dickson, Mary N; Gorodetsky, Alon A; Nguyen, Hung D

    2015-09-03

    Perylene-3,4,9,10-tetracarboxylic diimides (PTCDIs) are a well-known class of organic materials. Recently, these molecules have been incorporated within DNA as base surrogates, finding ready applications as probes of DNA structure and function. However, the assembly dynamics and kinetics of PTCDI DNA base surrogates have received little attention to date. Herein, we employ constant temperature molecular dynamics simulations to gain an improved understanding of the assembly of PTCDI dimers and trimers. We also use replica-exchange molecular dynamics simulations to elucidate the energetic landscape dictating the formation of stacked PTCDI structures. Our studies provide insight into the equilibrium configurations of multimeric PTCDIs and hold implications for the construction of DNA-inspired systems from perylene-derived organic semiconductor building blocks.

  9. A Systematic Composite Service Design Modeling Method Using Graph-Based Theory

    PubMed Central

    Elhag, Arafat Abdulgader Mohammed; Mohamad, Radziah; Aziz, Muhammad Waqar; Zeshan, Furkh

    2015-01-01

    The composite service design modeling is an essential process of the service-oriented software development life cycle, where the candidate services, composite services, operations and their dependencies are required to be identified and specified before their design. However, a systematic service-oriented design modeling method for composite services is still in its infancy as most of the existing approaches provide the modeling of atomic services only. For these reasons, a new method (ComSDM) is proposed in this work for modeling the concept of service-oriented design to increase the reusability and decrease the complexity of system while keeping the service composition considerations in mind. Furthermore, the ComSDM method provides the mathematical representation of the components of service-oriented design using the graph-based theoryto facilitate the design quality measurement. To demonstrate that the ComSDM method is also suitable for composite service design modeling of distributed embedded real-time systems along with enterprise software development, it is implemented in the case study of a smart home. The results of the case study not only check the applicability of ComSDM, but can also be used to validate the complexity and reusability of ComSDM. This also guides the future research towards the design quality measurement such as using the ComSDM method to measure the quality of composite service design in service-oriented software system. PMID:25928358

  10. A systematic composite service design modeling method using graph-based theory.

    PubMed

    Elhag, Arafat Abdulgader Mohammed; Mohamad, Radziah; Aziz, Muhammad Waqar; Zeshan, Furkh

    2015-01-01

    The composite service design modeling is an essential process of the service-oriented software development life cycle, where the candidate services, composite services, operations and their dependencies are required to be identified and specified before their design. However, a systematic service-oriented design modeling method for composite services is still in its infancy as most of the existing approaches provide the modeling of atomic services only. For these reasons, a new method (ComSDM) is proposed in this work for modeling the concept of service-oriented design to increase the reusability and decrease the complexity of system while keeping the service composition considerations in mind. Furthermore, the ComSDM method provides the mathematical representation of the components of service-oriented design using the graph-based theoryto facilitate the design quality measurement. To demonstrate that the ComSDM method is also suitable for composite service design modeling of distributed embedded real-time systems along with enterprise software development, it is implemented in the case study of a smart home. The results of the case study not only check the applicability of ComSDM, but can also be used to validate the complexity and reusability of ComSDM. This also guides the future research towards the design quality measurement such as using the ComSDM method to measure the quality of composite service design in service-oriented software system.

  11. Spatial and Temporal Dynamics and Value of Nature-Based Recreation, Estimated via Social Media

    PubMed Central

    Watson, Keri B.; Wood, Spencer A.; Ricketts, Taylor H.

    2016-01-01

    Conserved lands provide multiple ecosystem services, including opportunities for nature-based recreation. Managing this service requires understanding the landscape attributes underpinning its provision, and how changes in land management affect its contribution to human wellbeing over time. However, evidence from both spatially explicit and temporally dynamic analyses is scarce, often due to data limitations. In this study, we investigated nature-based recreation within conserved lands in Vermont, USA. We used geotagged photographs uploaded to the photo-sharing website Flickr to quantify visits by in-state and out-of-state visitors, and we multiplied visits by mean trip expenditures to show that conserved lands contributed US $1.8 billion (US $0.18–20.2 at 95% confidence) to Vermont’s tourism industry between 2007 and 2014. We found eight landscape attributes explained the pattern of visits to conserved lands; visits were higher in larger conserved lands, with less forest cover, greater trail density and more opportunities for snow sports. Some of these attributes differed from those found in other locations, but all aligned with our understanding of recreation in Vermont. We also found that using temporally static models to inform conservation decisions may have perverse outcomes for nature-based recreation. For example, static models suggest conserved land with less forest cover receive more visits, but temporally dynamic models suggest clearing forests decreases, rather than increases, visits to these sites. Our results illustrate the importance of understanding both the spatial and temporal dynamics of ecosystem services for conservation decision-making. PMID:27611325

  12. Meeting of the Minds: Perceptions of and Experiences with School-Based Health Services

    ERIC Educational Resources Information Center

    Amati, Jill Priest

    2011-01-01

    The purpose of this research is to understand the meanings and perceptions that families, teachers, and school-based service providers on the Westside in Syracuse, New York ascribe to school-based mental health services. The Westside is an economically disadvantaged and under-resourced neighborhood where children experience a great deal of stress…

  13. 20 CFR 302.7 - Establishing base year service and compensation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true Establishing base year service and compensation. 302.7 Section 302.7 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD UNEMPLOYMENT INSURANCE ACT QUALIFIED EMPLOYEE § 302.7 Establishing base year service and compensation....

  14. 20 CFR 302.7 - Establishing base year service and compensation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Establishing base year service and compensation. 302.7 Section 302.7 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD UNEMPLOYMENT INSURANCE ACT QUALIFIED EMPLOYEE § 302.7 Establishing base year service and compensation....

  15. 20 CFR 302.7 - Establishing base year service and compensation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 1 2012-04-01 2012-04-01 false Establishing base year service and compensation. 302.7 Section 302.7 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD UNEMPLOYMENT INSURANCE ACT QUALIFIED EMPLOYEE § 302.7 Establishing base year service and compensation....

  16. 20 CFR 302.7 - Establishing base year service and compensation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Establishing base year service and compensation. 302.7 Section 302.7 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD UNEMPLOYMENT INSURANCE ACT QUALIFIED EMPLOYEE § 302.7 Establishing base year service and compensation....

  17. 20 CFR 302.7 - Establishing base year service and compensation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true Establishing base year service and compensation. 302.7 Section 302.7 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD UNEMPLOYMENT INSURANCE ACT QUALIFIED EMPLOYEE § 302.7 Establishing base year service and compensation....

  18. To the Pacific: An Exploration of Computer-Based Reference Services.

    ERIC Educational Resources Information Center

    Cound, William T.

    In contrast to the usual approach in computer-based reference services, which is to go into a specific data base to retrieve citations to material on a specific, narrowly-defined topic, this report demonstrates how such services could be useful in a broad approach to a complex subject, using an investigation of trends in the world aluminum…

  19. Activity-Based Costing in User Services of an Academic Library.

    ERIC Educational Resources Information Center

    Ellis-Newman, Jennifer

    2003-01-01

    The rationale for using Activity-Based Costing (ABC) in a library is to allocate indirect costs to products and services based on the factors that most influence them. This paper discusses the benefits of ABC to library managers and explains the steps involved in implementing ABC in the user services area of an Australian academic library.…

  20. Evaluating the Usage of Cloud-Based Collaboration Services through Teamwork

    ERIC Educational Resources Information Center

    Qin, Li; Hsu, Jeffrey; Stern, Mel

    2016-01-01

    With the proliferation of cloud computing for both organizational and educational use, cloud-based collaboration services are transforming how people work in teams. The authors investigated the determinants of the usage of cloud-based collaboration services including teamwork quality, computer self-efficacy, and prior experience, as well as its…

  1. Case-Based Pedagogy Using Student-Generated Vignettes: A Pre-Service Intercultural Awareness Tool

    ERIC Educational Resources Information Center

    Cournoyer, Amy

    2010-01-01

    This qualitative study investigated the effectiveness of case-based pedagogy as an instructional tool aimed at increasing cultural awareness and competence in the preparation of 18 pre-service and in-service students enrolled in an Intercultural Education course. Each participant generated a vignette based on an instructional challenge identified…

  2. Service Use by At-Risk Youths after School-Based Suicide Screening

    ERIC Educational Resources Information Center

    Gould, Madelyn S.; Marrocco, Frank A.; Hoagwood, Kimberly; Kleinman, Marjorie; Amakawa, Lia; Altschuler, Elizabeth

    2009-01-01

    Objective: We sought to examine follow-up service use by students identified at risk for suicidal behavior in a school-based screening program and assess barriers to seeking services as perceived by youths and parents. Method: We conducted a longitudinal study of 317 at-risk youths identified by a school-based suicide screening in six high schools…

  3. Performance-Based Service Quality Model: An Empirical Study on Japanese Universities

    ERIC Educational Resources Information Center

    Sultan, Parves; Wong, Ho

    2010-01-01

    Purpose: This paper aims to develop and empirically test the performance-based higher education service quality model. Design/methodology/approach: The study develops 67-item instrument for measuring performance-based service quality with a particular focus on the higher education sector. Scale reliability is confirmed using the Cronbach's alpha.…

  4. The Knowledge Base as an Extension of Distance Learning Reference Service

    ERIC Educational Resources Information Center

    Casey, Anne Marie

    2012-01-01

    This study explores knowledge bases as extension of reference services for distance learners. Through a survey and follow-up interviews with distance learning librarians, this paper discusses their interest in creating and maintaining a knowledge base as a resource for reference services to distance learners. It also investigates their perceptions…

  5. Extending Geographic Weights of Evidence Models for Use in Location Based Services

    ERIC Educational Resources Information Center

    Sonwalkar, Mukul Dinkar

    2012-01-01

    This dissertation addresses the use and modeling of spatio-temporal data for the purposes of providing applications for location based services. One of the major issues in dealing with spatio-temporal data for location based services is the availability and sparseness of such data. Other than the hardware costs associated with collecting movement…

  6. Can market-based policies accomplish the optimal floodplain management? A gap between static and dynamic models.

    PubMed

    Mori, Koichiro

    2009-02-01

    The purpose of this short article is to set static and dynamic models for optimal floodplain management and to compare policy implications from the models. River floodplains are important multiple resources in that they provide various ecosystem services. It is fundamentally significant to consider environmental externalities that accrue from ecosystem services of natural floodplains. There is an interesting gap between static and dynamic models about policy implications for floodplain management, although they are based on the same assumptions. Essentially, we can derive the same optimal conditions, which imply that the marginal benefits must equal the sum of the marginal costs and the social external costs related to ecosystem services. Thus, we have to internalise the external costs by market-based policies. In this respect, market-based policies seem to be effective in a static model. However, they are not sufficient in the context of a dynamic model because the optimal steady state turns out to be unstable. Based on a dynamic model, we need more coercive regulation policies.

  7. Dynamics of Ecosystem Services during Forest Transitions in Reventazón, Costa Rica

    PubMed Central

    Vallet, Améline; Locatelli, Bruno; Levrel, Harold; Brenes Pérez, Christian; Imbach, Pablo; Estrada Carmona, Natalia; Manlay, Raphaël; Oszwald, Johan

    2016-01-01

    The forest transition framework describes the temporal changes of forest areas with economic development. A first phase of forest contraction is followed by a second phase of expansion once a turning point is reached. This framework does not differentiate forest types or ecosystem services, and describes forests regardless of their contribution to human well-being. For several decades, deforestation in many tropical regions has degraded ecosystem services, such as watershed regulation, while increasing provisioning services from agriculture, for example, food. Forest transitions and expansion have been observed in some countries, but their consequences for ecosystem services are often unclear. We analyzed the implications of forest cover change on ecosystem services in Costa Rica, where a forest transition has been suggested. A review of literature and secondary data on forest and ecosystem services in Costa Rica indicated that forest transition might have led to an ecosystem services transition. We modeled and mapped the changes of selected ecosystem services in the upper part of the Reventazón watershed and analyzed how supply changed over time in order to identify possible transitions in ecosystem services. The modeled changes of ecosystem services is similar to the second phase of a forest transition but no turning point was identified, probably because of the limited temporal scope of the analysis. Trends of provisioning and regulating services and their tradeoffs were opposite in different spatial subunits of our study area, which highlights the importance of scale in the analysis of ecosystem services and forest transitions. The ecosystem services transition framework proposed in this study is useful for analyzing the temporal changes of ecosystem services and linking socio-economic drivers to ecosystem services demand at different scales. PMID:27390869

  8. 45 CFR 2517.600 - How are funds for community-based service-learning programs distributed?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false How are funds for community-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE COMMUNITY-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2517.600 How are funds for community-based service-learning programs distributed?...

  9. 45 CFR 2517.300 - Who may participate in a community-based service-learning program?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false Who may participate in a community-based service... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE COMMUNITY-BASED SERVICE-LEARNING PROGRAMS Eligibility To Participate § 2517.300 Who may participate in a community-based service-learning...

  10. 45 CFR 2517.600 - How are funds for community-based service-learning programs distributed?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 4 2014-10-01 2014-10-01 false How are funds for community-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE COMMUNITY-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2517.600 How are funds for community-based service-learning programs distributed?...

  11. 45 CFR 2516.600 - How are funds for school-based service-learning programs distributed?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 4 2012-10-01 2012-10-01 false How are funds for school-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2516.600 How are funds for school-based service-learning programs distributed? (a)...

  12. 45 CFR 2516.600 - How are funds for school-based service-learning programs distributed?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 4 2014-10-01 2014-10-01 false How are funds for school-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2516.600 How are funds for school-based service-learning programs distributed? (a)...

  13. 45 CFR 2517.600 - How are funds for community-based service-learning programs distributed?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 4 2011-10-01 2011-10-01 false How are funds for community-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE COMMUNITY-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2517.600 How are funds for community-based service-learning programs distributed?...

  14. 45 CFR 2517.600 - How are funds for community-based service-learning programs distributed?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 4 2013-10-01 2013-10-01 false How are funds for community-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE COMMUNITY-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2517.600 How are funds for community-based service-learning programs distributed?...

  15. 45 CFR 2516.600 - How are funds for school-based service-learning programs distributed?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false How are funds for school-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2516.600 How are funds for school-based service-learning programs distributed? (a)...

  16. 45 CFR 2517.600 - How are funds for community-based service-learning programs distributed?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 4 2012-10-01 2012-10-01 false How are funds for community-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE COMMUNITY-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2517.600 How are funds for community-based service-learning programs distributed?...

  17. 45 CFR 2516.600 - How are funds for school-based service-learning programs distributed?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 4 2011-10-01 2011-10-01 false How are funds for school-based service-learning... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS Distribution of Funds § 2516.600 How are funds for school-based service-learning programs distributed? (a)...

  18. Autojoin: A Simple Rule Based Query Service for Complex Databases

    NASA Astrophysics Data System (ADS)

    Gaffney, N. I.; Gardner, L.; Brandt, M.

    Most databases used today are no longer flat. While the power of using these more complex data stores is well known, construction of queries can be quite a complex task. Currently this often requires detailed knowledge of the database structure and schema. As we move towards a VO paradigm, users cannot be expected to know the structure of databases, but will need to query them. Databases will need to provide query engines to complete queries automatically given only what the user wants to have returned and any qualifications they place on the query. For years StarView, a database query and data retrieval tool for the Space Telescope Science Institute, relied on a complex third party LISP-based program (QUICK) to construct valid SQL queries for the one database it could query. This limited our ability to support StarView as we could not easily add new rules to the system without completely rebuilding the query engine. Furthermore, QUICK did not have the ability to create SQL that would join tables in different databases (but hosted on the same server). Finally, the cost of upgrading to a new version of QUICK was prohibitively high. Our solution was to develop a rather simple database table driven Perl CGI program which is able to take as its input a skeleton SQL program. This may come from a program or other web page. In the query only the SELECT and user qualified WHERE clause are specified; no FROM or WHERE clause join information is included. The service then returns a fully qualified and syntactically correct query for the host database SQL program that can be used to get the information the user needs. Thus, an additional layer of abstraction for dealing with databases is created, freeing the user from having to know how tables are related in the database. In this paper we discuss the design and algorithm used to make Autojoin work as well as discuss how, when combined with a robust and searchable description of all the fields that can be publicly queried in

  19. GNSS Wristwatch Device for Networked Operations Supporting Location Based Services

    DTIC Science & Technology

    2008-09-01

    Database Server Oracle Mapping Server and LocaterNet web application User Computers External WMS Services USGS, NOAA , NASA, etc. TIDGET Data and Local... radar pulled over the internet from a NOAA Web Map Service EXAMPLE LOCATORNET APPLICATION Figure 13 illustrates a basic LocatorNet personnel tracking...Powers Blvd and 30th Street,” or “Where was User X at 2pm yesterday?” By making use of live WMS feeds such as Doppler radar users can even make

  20. AN INDIVIDUAL-BASED MODEL OF COTTUS POPULATION DYNAMICS

    EPA Science Inventory

    We explored population dynamics of a southern Appalachian population of Cottus bairdi using a spatially-explicit, individual-based model. The model follows daily growth, mortality, and spawning of individuals as a function of flow and temperature. We modeled movement of juveniles...

  1. Wavelet-based analysis of blood pressure dynamics in rats

    NASA Astrophysics Data System (ADS)

    Pavlov, A. N.; Anisimov, A. A.; Semyachkina-Glushkovskaya, O. V.; Berdnikova, V. A.; Kuznecova, A. S.; Matasova, E. G.

    2009-02-01

    Using a wavelet-based approach, we study stress-induced reactions in the blood pressure dynamics in rats. Further, we consider how the level of the nitric oxide (NO) influences the heart rate variability. Clear distinctions for male and female rats are reported.

  2. Dynamic Buffer Capacity in Acid-Base Systems.

    PubMed

    Michałowska-Kaczmarczyk, Anna M; Michałowski, Tadeusz

    The generalized concept of 'dynamic' buffer capacity βV is related to electrolytic systems of different complexity where acid-base equilibria are involved. The resulting formulas are presented in a uniform and consistent form. The detailed calculations are related to two Britton-Robinson buffers, taken as examples.

  3. Pan American Airways/Naval Air Transport Service/destroyer base site showing stone ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Pan American Airways/Naval Air Transport Service/destroyer base site showing stone wall around patio. View facing east-southeast. - U.S. Naval Base, Pearl Harbor, Pearl City Peninsula, Pearl City, Honolulu County, HI

  4. Pan American Airways/Naval Air Transport Service/destroyer base site showing brick ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Pan American Airways/Naval Air Transport Service/destroyer base site showing brick and concrete paving of patio, and circular planters. View facing east. - U.S. Naval Base, Pearl Harbor, Pearl City Peninsula, Pearl City, Honolulu County, HI

  5. A component-based, distributed object services architecture for a clinical workstation.

    PubMed Central

    Chueh, H. C.; Raila, W. F.; Pappas, J. J.; Ford, M.; Zatsman, P.; Tu, J.; Barnett, G. O.

    1996-01-01

    Attention to an architectural framework in the development of clinical applications can promote reusability of both legacy systems as well as newly designed software. We describe one approach to an architecture for a clinical workstation application which is based on a critical middle tier of distributed object-oriented services. This tier of network-based services provides flexibility in the creation of both the user interface and the database tiers. We developed a clinical workstation for ambulatory care using this architecture, defining a number of core services including those for vocabulary, patient index, documents, charting, security, and encounter management. These services can be implemented through proprietary or more standard distributed object interfaces such as CORBA and OLE. Services are accessed over the network by a collection of user interface components which can be mixed and matched to form a variety of interface styles. These services have also been reused with several applications based on World Wide Web browser interfaces. PMID:8947744

  6. Multi-attribute Regret-Based Dynamic Pricing

    NASA Astrophysics Data System (ADS)

    Jumadinova, Janyl; Dasgupta, Prithviraj

    In this paper, we consider the problem of dynamic pricing by a set of competing sellers in an information economy where buyers differentiate products along multiple attributes, and buyer preferences can change temporally. Previous research in this area has either focused on dynamic pricing along a limited number of (e.g. binary) attributes, or, assumes that each seller has access to private information such as preference distribution of buyers, and profit/price information of other sellers. However, in real information markets, private information about buyers and sellers cannot be assumed to be available a priori. Moreover, due to the competition between sellers, each seller faces a tradeoff between accuracy and rapidity of the pricing mechanism. In this paper, we describe a multi-attribute dynamic pricing algorithm based on minimax regret that can be used by a seller's agent called a pricebot, to maximize the seller's utility. Our simulation results show that the minimax regret based dynamic pricing algorithm performs significantly better than other algorithms for rapidly and dynamically tracking consumer attributes without using any private information from either buyers or sellers.

  7. Competency-Based Adult High School Completion Student Services Guide.

    ERIC Educational Resources Information Center

    Singer, Elizabeth; And Others

    Designed as part of a 310 Special Demonstration and Teacher Training Project undertaken at Brevard Community College, this student services guide contains information to assist adult education administrators, counselors, instructors, and office personnel in meeting the needs of students enrolled in adult/community education schools. Primary…

  8. Creative Alternatives for Service Learning: A Project-Based Approach.

    ERIC Educational Resources Information Center

    Turner, Roselyn M.; Grizzaffi, Karen

    This document discusses how service learning has developed over the past century in its practices from involvement in volunteerism to active civic engagement. It is so beneficial to both learners and the community that many educators and government leaders believe it should be a required component in the educational career of all students. The…

  9. Defining Child Neglect Based on Child Protective Services Data

    ERIC Educational Resources Information Center

    Dubowitz, H.; Pitts, S.C.; Litrownik, A.J.; Cox, C.E.; Runyan, D.; Black, M.M.

    2005-01-01

    Objectives:: To compare neglect defined by Child Protective Services official codes with neglect defined by a review of CPS narrative data, and to examine the validity of the different neglect measures using children's functioning at age 8 years. Methods:: Data are from 740 children participating in a consortium of longitudinal studies on child…

  10. Web-Based Academic Support Services: Guidelines for Extensibility

    ERIC Educational Resources Information Center

    McCracken, Holly

    2005-01-01

    Using the experience of the University of Illinois at Springfield's College of Liberal Arts and Sciences at the as a foundation for discussion, this paper addresses the provision of student support services to distant students within the context of development and expansion. Specific issues for consideration include: integrating student support…

  11. Assessing Educational Information Services Through A Nationwide Data Base.

    ERIC Educational Resources Information Center

    Madey, Doren; Everett, Michael

    The explicit goal of most educational information or resource centers, is to assist clients in obtaining and utilizing information to improve educational practice and aid in educational decision making. As the number of services has increased, the need to systematically assess them has become critical. Previous efforts have been limited and…

  12. An ontology-based collaborative service framework for agricultural information

    Technology Transfer Automated Retrieval System (TEKTRAN)

    In recent years, China has developed modern agriculture energetically. An effective information framework is an important way to provide farms with agricultural information services and improve farmer's production technology and their income. The mountain areas in central China are dominated by agri...

  13. Parent Perceptions of School-Based Occupational Therapy Services

    ERIC Educational Resources Information Center

    Benson, Jeryl D.; Elkin, Kathleen; Wechsler, Julie; Byrd, Lindsey

    2015-01-01

    This study aims to explore the perceptions of parents of children receiving occupational therapy in educational settings, understand the importance of the parent/occupational therapist relationship and its impact on the outcomes of therapy. In addition, this study aims to reveal best practices when providing services within the school system in…

  14. Cool Apps: Building Cryospheric Data Applications with Standards-Based Service Oriented Architecture

    NASA Astrophysics Data System (ADS)

    Oldenburg, J.; Truslove, I.; Collins, J. A.; Liu, M.; Lewis, S.; Brodzik, M.

    2012-12-01

    The National Snow and Ice Data Center (NSIDC) holds a large collection of cryospheric data, and is involved in a number of informatics research and development projects aimed at improving the discoverability and accessibility of these data. To develop high- quality software in a timely manner, we have adopted a Service- Oriented Architecture (SOA) approach for our core technical infrastructure development. Data services at NSIDC are internally exposed to other tools and applications through standards-based service interfaces. These standards include OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting), various OGC (Open Geospatial Consortium) standards including WMS (Web Map Service) and WFS (Web Feature Service), ESIP (Federation of Earth Sciences Information Partners) OpenSearch, and NSIDC-defined service endpoints which follow a RESTful architecture. By taking a standards-based approach, we are able to use off-the-shelf tools and libraries to consume, translate and broker these data services, and thus develop applications faster. Additionally, by exposing public interfaces to these services we provide valuable data services to technical collaborators; for example, NASA Reverb (http://reverb.echo.nasa.gov) uses NSIDC's WMS services. Our latest generation of web applications consume these data services directly. The most complete example of this is the Operation IceBridge Data Portal (http://nsidc.org/icebridge/ portal) which depends on many of the aforementioned services, retrieving data in several ways. The maps it displays are obtained through the use of WMS and WFS protocols from a MapServer instance hosted at NSIDC. Links to the scientific data collected on Operation IceBridge campaigns are obtained through ESIP OpenSearch requests service providers that encapsulate our metadata databases. These standards-based web services are also developed at NSIDC and are designed to be used independently of the Portal. This poster provides a visual

  15. An IMS-Based Middleware Solution for Energy-Efficient and Cost-Effective Mobile Multimedia Services

    NASA Astrophysics Data System (ADS)

    Bellavista, Paolo; Corradi, Antonio; Foschini, Luca

    Mobile multimedia services have recently become of extreme industrial relevance due to the advances in both wireless client devices and multimedia communications. That has motivated important standardization efforts, such as the IP Multimedia Subsystem (IMS) to support session control, mobility, and interoperability in all-IP next generation networks. Notwithstanding the central role of IMS in novel mobile multimedia, the potential of IMS-based service composition for the development of new classes of ready-to-use, energy-efficient, and cost-effective services is still widely unexplored. The paper proposes an original solution for the dynamic and standard-compliant redirection of incoming voice calls towards WiFi-equipped smart phones. The primary design guideline is to reduce energy consumption and service costs for the final user by automatically switching from the 3G to the WiFi infrastructure whenever possible. The proposal is fully compliant with the IMS standard and exploits the recently released IMS presence service to update device location and current communication opportunities. The reported experimental results point out that our solution, in a simple way and with full compliance with state-of-the-art industrially-accepted standards, can significantly increase battery lifetime without negative effects on call initiation delay.

  16. Simulation of Naval Guns' Breechblock System Dynamics Based on ADAMS

    NASA Astrophysics Data System (ADS)

    Tan, Bo; Liu, Hui-Min; Liu, Kai

    In order to study the dynamical characteristics of the breechblock system during gun firing, a virtual prototype model was established based on ADAMS, in which motion and force transmission among mechanisms are realized by collision. By simulation, kinematics and dynamics properties of main components are obtained, and the relationships between the motion of breechblock and the position of breechblock opening plate are analyzed. According to the simulation results, the collision among the breechblock opening plate and the roller is discontinuous, which may make the breechblock system fail to hitch the breechblock reliably. And within allowable scope of the structure, the breechblock opening template should be installed near the upside as much as possible.

  17. Structure and dynamics of acetate anion-based ionic liquids from molecular dynamics study

    NASA Astrophysics Data System (ADS)

    Chandran, Aneesh; Prakash, Karthigeyan; Senapati, Sanjib

    2010-08-01

    Acetate anion-based ionic liquids (ILs) have found wide range of applications. The microstructure and dynamics of this IL family have not been clearly understood yet. We report molecular dynamics simulation results of three acetate anion-based ionic liquids that encompass the most common IL cations. Simulations are performed based on a set of proposed force field parameters for IL acetate anion which can be combined with existing parameters for IL cations to simulate large variety of ILs. The computed liquid density and IR spectral data for [BMIM][Ac] are found to match very well with available experimental results. The strong amino-group-associated interactions in [TMG][Ac] are seen to bring about higher cohesive energy density, stronger ion packing, and more restricted translational and rotational mobilities of the constituent ions. The IL anions are found to track the cation movements in all systems, implying that ions in ILs travel in pairs or clusters.

  18. Mosquito population dynamics from cellular automata-based simulation

    NASA Astrophysics Data System (ADS)

    Syafarina, Inna; Sadikin, Rifki; Nuraini, Nuning

    2016-02-01

    In this paper we present an innovative model for simulating mosquito-vector population dynamics. The simulation consist of two stages: demography and dispersal dynamics. For demography simulation, we follow the existing model for modeling a mosquito life cycles. Moreover, we use cellular automata-based model for simulating dispersal of the vector. In simulation, each individual vector is able to move to other grid based on a random walk. Our model is also capable to represent immunity factor for each grid. We simulate the model to evaluate its correctness. Based on the simulations, we can conclude that our model is correct. However, our model need to be improved to find a realistic parameters to match real data.

  19. Momentum-Based Dynamics for Spacecraft with Chained Revolute Appendages

    NASA Technical Reports Server (NTRS)

    Queen, Steven; London, Ken; Gonzalez, Marcelo

    2005-01-01

    An efficient formulation is presented for a sub-class of multi-body dynamics problems that involve a six degree-of-freedom base body and a chain of N rigid linkages connected in series by single degree-of-freedom revolute joints. This general method is particularly well suited for simulations of spacecraft dynamics and control that include the modeling of an orbiting platform with or without internal degrees of freedom such as reaction wheels, dampers, and/or booms. In the present work, particular emphasis is placed on dynamic simulation of multi-linkage robotic manipulators. The differential equations of motion are explicitly given in terms of linear and angular momentum states, which can be evaluated recursively along a serial chain of linkages for an efficient real-time solution on par with the best of the O(N3) methods.

  20. Dynamic contact angle of water-based titanium oxide nanofluid.

    PubMed

    Radiom, Milad; Yang, Chun; Chan, Weng Kong

    2013-06-11

    This paper presents an investigation into spreading dynamics and dynamic contact angle of TiO2-deionized water nanofluids. Two mechanisms of energy dissipation, (1) contact line friction and (2) wedge film viscosity, govern the dynamics of contact line motion. The primary stage of spreading has the contact line friction as the dominant dissipative mechanism. At the secondary stage of spreading, the wedge film viscosity is the dominant dissipative mechanism. A theoretical model based on combination of molecular kinetic theory and hydrodynamic theory which incorporates non-Newtonian viscosity of solutions is used. The model agreement with experimental data is reasonable. Complex interparticle interactions, local pinning of the contact line, and variations in solid-liquid interfacial tension are attributed to errors.

  1. Dynamic contact angle of water-based titanium oxide nanofluid

    PubMed Central

    2013-01-01

    This paper presents an investigation into spreading dynamics and dynamic contact angle of TiO2-deionized water nanofluids. Two mechanisms of energy dissipation, (1) contact line friction and (2) wedge film viscosity, govern the dynamics of contact line motion. The primary stage of spreading has the contact line friction as the dominant dissipative mechanism. At the secondary stage of spreading, the wedge film viscosity is the dominant dissipative mechanism. A theoretical model based on combination of molecular kinetic theory and hydrodynamic theory which incorporates non-Newtonian viscosity of solutions is used. The model agreement with experimental data is reasonable. Complex interparticle interactions, local pinning of the contact line, and variations in solid–liquid interfacial tension are attributed to errors. PMID:23759071

  2. Models of Quality of Service and Quality of Information Assurance Towards Their Dynamic Adaptation

    DTIC Science & Technology

    2011-03-01

    50 iv Summary As we increasingly rely on online services on computer and network systems to support...on. Chen et al. (2004) describe QoS requirements of various network applications for online services , (e.g., web browsing, email, file transfer...audio and video broadcasting, audio and video on demand, audio and video conferencing, voice over IP, etc). QoS requirements for those online services are

  3. Circle quorum system-based non-stop network service model.

    PubMed

    Song, Ping; Sun, Jian-ling; He, Zhi-jun

    2004-05-01

    Rapid developments in network systems of business service have resulted in more reliance on distributed computing, typified by "subscriber/push" architectures. Unfortunately, frequent and unexpectable network failures were routine, and downtime was not in hours, but in days. High availability has become the most important factor decreasing business risk and improving Quality of Service. Cluster technology has solved the non-stop problem on Local Area Network. However, most technologies including cluster today fail to ensure the non-stop Internet service based on Routers. With good performance on high availability and fault tolerance, quorum systems are very suitable for application to distributed business service networks. In this work, we modeled and developed a non-stop Internet service system based on a new quorum system, circle quorum system, for Boston Mutual Fund Broker, US. With five protocols, it provided highly available data services for clients on Internet.

  4. Research on registry centre for geospatial web service based on CSW specification

    NASA Astrophysics Data System (ADS)

    Chen, Yumin; Song, Chunqiao; Shen, Shengyu; Yang, Qing

    2008-12-01

    With the increase of geospatial data and services, how to more efficiently utilize and share the geographic information becomes a crucial problem. To effectively integrate and enhance abundant geographic information anywhere, this paper presents a Registry Centre for Geospatial Web Service (RCGWS) based on the Open Geospatial Consortium (OGC) Catalogue Service for Web and the ebXML Registry Information Model (ebRIM), which provides registration and discovery portals for geospatial metadata for dataset and services. The design ideology and architecture of RCGWS are introduced, and the techniques of appending GIS services classification in extended ebRIM and external interfaces of RCGWS based on OGC CWS are discussed. The implementation of RCGWS platform shows that this Registry Centre can satisfy the requirement of geospatial dataset and services.

  5. Optimal Power Control in Wireless Powered Sensor Networks: A Dynamic Game-Based Approach

    PubMed Central

    Xu, Haitao; Guo, Chao; Zhang, Long

    2017-01-01

    In wireless powered sensor networks (WPSN), it is essential to research uplink transmit power control in order to achieve throughput performance balancing and energy scheduling. Each sensor should have an optimal transmit power level for revenue maximization. In this paper, we discuss a dynamic game-based algorithm for optimal power control in WPSN. The main idea is to use the non-cooperative differential game to control the uplink transmit power of wireless sensors in WPSN, to extend their working hours and to meet QoS (Quality of Services) requirements. Subsequently, the Nash equilibrium solutions are obtained through Bellman dynamic programming. At the same time, an uplink power control algorithm is proposed in a distributed manner. Through numerical simulations, we demonstrate that our algorithm can obtain optimal power control and reach convergence for an infinite horizon. PMID:28282945

  6. Cool Apps: Building Cryospheric Data Applications With Standards-Based Service Oriented Architecture

    NASA Astrophysics Data System (ADS)

    Collins, J. A.; Truslove, I.; Billingsley, B. W.; Oldenburg, J.; Brodzik, M.; Lewis, S.; Liu, M.

    2012-12-01

    The National Snow and Ice Data Center (NSIDC) holds a large collection of cryospheric data, and is involved in a number of informatics research and development projects aimed at improving the discoverability and accessibility of these data. To develop high-quality software in a timely manner, we have adopted a Service-Oriented Architecture (SOA) approach for our core technical infrastructure development. Data services at NSIDC are internally exposed to other tools and applications through standards-based service interfaces. These standards include OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting), various OGC (Open Geospatial Consortium) standards including WMS (Web Map Service) and WFS (Web Feature Service), ESIP (Federation of Earth Sciences Information Partners) OpenSearch, and NSIDC-specific RESTful services. By taking a standards-based approach, we are able to use off-the-shelf tools and libraries to consume, translate and broker these data services, and thus develop applications faster. Additionally, by exposing public interfaces to these services we provide valuable data services to technical collaborators; for example, NASA Reverb (http://reverb.echo.nasa.gov) uses NSIDC's WMS services. Our latest generation of web applications consume these data services directly. The most complete example of this is the Operation IceBridge Data Portal (http://nsidc.org/icebridge/portal) which depends on many of the aforementioned services, and clearly exhibits many of the advantages of building applications atop a service-oriented architecture. This presentation outlines the architectural approach and components and open standards and protocols adopted at NSIDC, demonstrates the interactions and uses of public and internal service interfaces currently powering applications including the IceBridge Data Portal, and outlines the benefits and challenges of this approach.

  7. Comparing patient and provider perceptions of home- and community-based services: social network analysis as a service integration metric.

    PubMed

    Ryan, David P; Puri, Manveen; Liu, Barbara A

    2013-01-01

    Integrated home- and community-based services (HCBS) for frail seniors require a unique style of teamwork and collaboration. In four case studies, patient perceptions of teamwork and collaboration among their HCBS care providers are compared with those of the providers themselves using network analysis. The degree of coherence between these perceived networks are examined using network analytics, and network visualizations are discussed. The value of network analysis in research on HCBS is considered.

  8. Trotter-based simulation of quantum-classical dynamics.

    PubMed

    Kernan, Dónal Mac; Ciccotti, Giovanni; Kapral, Raymond

    2008-01-17

    Quantum rate processes in condensed phase systems are often computed by combining quantum and classical descriptions of the dynamics. An algorithm for simulating the quantum-classical Liouville equation, which describes the dynamics of a quantum subsystem coupled to a classical bath, is presented in this paper. The algorithm is based on a Trotter decomposition of the quantum-classical propagator, in conjunction with Monte Carlo sampling of quantum transitions, to yield a surface-hopping representation of the dynamics. An expression for the nonadiabatic propagator that is responsible for quantum transitions and associated bath momentum changes is derived in a form that is convenient for Monte Carlo sampling and exactly conserves the total energy of the system in individual trajectories. The expectation values of operators or quantum correlation functions can be evaluated by initial sampling of quantum states and use of quantum-classical Liouville dynamics for the time evolution. The algorithm is tested by calculations on the spin-boson model, for which exact quantum results are available, and is shown to reproduce the exact results for stronger nonadiabatic coupling and much longer times using fewer trajectories than other schemes for simulating quantum-classical Liouville dynamics.

  9. A Novel Protective Framework for Defeating HTTP-Based Denial of Service and Distributed Denial of Service Attacks

    PubMed Central

    Saleh, Mohammed A.; Abdul Manaf, Azizah

    2015-01-01

    The growth of web technology has brought convenience to our life, since it has become the most important communication channel. However, now this merit is threatened by complicated network-based attacks, such as denial of service (DoS) and distributed denial of service (DDoS) attacks. Despite many researchers' efforts, no optimal solution that addresses all sorts of HTTP DoS/DDoS attacks is on offer. Therefore, this research aims to fix this gap by designing an alternative solution called a flexible, collaborative, multilayer, DDoS prevention framework (FCMDPF). The innovative design of the FCMDPF framework handles all aspects of HTTP-based DoS/DDoS attacks through the following three subsequent framework's schemes (layers). Firstly, an outer blocking (OB) scheme blocks attacking IP source if it is listed on the black list table. Secondly, the service traceback oriented architecture (STBOA) scheme is to validate whether the incoming request is launched by a human or by an automated tool. Then, it traces back the true attacking IP source. Thirdly, the flexible advanced entropy based (FAEB) scheme is to eliminate high rate DDoS (HR-DDoS) and flash crowd (FC) attacks. Compared to the previous researches, our framework's design provides an efficient protection for web applications against all sorts of DoS/DDoS attacks. PMID:26065015

  10. A Novel Protective Framework for Defeating HTTP-Based Denial of Service and Distributed Denial of Service Attacks.

    PubMed

    Saleh, Mohammed A; Abdul Manaf, Azizah

    2015-01-01

    The growth of web technology has brought convenience to our life, since it has become the most important communication channel. However, now this merit is threatened by complicated network-based attacks, such as denial of service (DoS) and distributed denial of service (DDoS) attacks. Despite many researchers' efforts, no optimal solution that addresses all sorts of HTTP DoS/DDoS attacks is on offer. Therefore, this research aims to fix this gap by designing an alternative solution called a flexible, collaborative, multilayer, DDoS prevention framework (FCMDPF). The innovative design of the FCMDPF framework handles all aspects of HTTP-based DoS/DDoS attacks through the following three subsequent framework's schemes (layers). Firstly, an outer blocking (OB) scheme blocks attacking IP source if it is listed on the black list table. Secondly, the service traceback oriented architecture (STBOA) scheme is to validate whether the incoming request is launched by a human or by an automated tool. Then, it traces back the true attacking IP source. Thirdly, the flexible advanced entropy based (FAEB) scheme is to eliminate high rate DDoS (HR-DDoS) and flash crowd (FC) attacks. Compared to the previous researches, our framework's design provides an efficient protection for web applications against all sorts of DoS/DDoS attacks.

  11. Dynamics of individual polymers using microfluidic based microcurvilinear flow.

    PubMed

    Cheng, Chao-Min; Kim, Yongtae; Yang, Jui-Ming; Leuba, Sanford H; Leduc, Philip R

    2009-08-21

    Polymer dynamics play an important role in a diversity of fields including materials science, physics, biology and medicine. The spatiotemporal responses of individual molecules such as biopolymers have been critical to the development of new materials, the expanded understanding of cell structures including cytoskeletal dynamics, and DNA replication. The ability to probe single molecule dynamics however is often limited by the availability of small-scale technologies that can manipulate these systems to uncover highly intricate behaviors. Advances in micro- and nano-scale technologies have simultaneously provided us with valuable tools that can interface with these systems including methods such as microfluidics. Here, we report on the creation of micro-curvilinear flow through a small-scale fluidic approach, which we have been used to impose a flow-based high radial acceleration ( approximately 10(3) g) on individual flexible polymers. We were able to employ this microfluidic-based approach to adjust and control flow velocity and acceleration to observe real-time dynamics of fluorescently labeled lambda-phage DNA molecules in our device. This allowed us to impose mechanical stimulation including stretching and bending on single molecules in localized regimes through a simple and straightforward technology-based method. We found that the flexible DNA molecules exhibited multimodal responses including distinct conformations and controllable curvatures; these characteristics were directly related to both the elongation and bending dynamics dictated by their locations within the curvilinear flow. We analyzed the dynamics of these individual molecules to determine their elongation strain rates and curvatures ( approximately 0.09 microm(-1)) at different locations in this system to probe the individual polymer structural response. These results demonstrate our ability to create high radial acceleration flow and observe real-time dynamic responses applied directly to

  12. Correlation-based OTDR for in-service monitoring of 64-split TDM PON.

    PubMed

    Shim, H K; Cho, K Y; Takushima, Y; Chung, Y C

    2012-02-27

    We demonstrate that the correlation-based optical time domain reflectometer (OTDR) can be used for the in-service monitoring of the 64-split time-division-multiplexed passive optical network (TDM PON). To achieve this objective, we superimpose a pseudo noise (PN) sequence having a modulation depth of ~40% to the downstream signal and utilize it for the correlation detection. However, the use of such a large PN sequence can seriously deteriorate the performance of the downstream receiver. Thus, we apply 8B/10B encoding to the downstream signal, and then filter out the PN sequence at the downstream receiver by using a high-pass filter. As a result, the power penalty caused by the use of a large PN sequence is reduced to an acceptable level (<3 dB), while the dynamic range of this correlation-based OTDR is increased to ~30 dB. We then evaluate the performance of the proposed OTDR in the fiber link similar to the optical distribution network of the 64-split TDM PON. The results show that this OTDR can detect both the reflective and non-reflective events occurred in the feeder fiber as well as the reflective events in the drop fibers even in the 64-split TDM PON.

  13. 47 CFR 90.681 - EA-based SMR service areas.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false EA-based SMR service areas. 90.681 Section 90..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.681 EA-based SMR service areas. EA licenses in for...

  14. 47 CFR 90.661 - MTA-based SMR service areas.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false MTA-based SMR service areas. 90.661 Section 90..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.661 MTA-based SMR service areas. MTA licenses for...

  15. Prediction-based dynamic load-sharing heuristics

    NASA Technical Reports Server (NTRS)

    Goswami, Kumar K.; Devarakonda, Murthy; Iyer, Ravishankar K.

    1993-01-01

    The authors present dynamic load-sharing heuristics that use predicted resource requirements of processes to manage workloads in a distributed system. A previously developed statistical pattern-recognition method is employed for resource prediction. While nonprediction-based heuristics depend on a rapidly changing system status, the new heuristics depend on slowly changing program resource usage patterns. Furthermore, prediction-based heuristics can be more effective since they use future requirements rather than just the current system state. Four prediction-based heuristics, two centralized and two distributed, are presented. Using trace driven simulations, they are compared against random scheduling and two effective nonprediction based heuristics. Results show that the prediction-based centralized heuristics achieve up to 30 percent better response times than the nonprediction centralized heuristic, and that the prediction-based distributed heuristics achieve up to 50 percent improvements relative to their nonprediction counterpart.

  16. Dynamic reasoning in a knowledge-based system

    NASA Technical Reports Server (NTRS)

    Rao, Anand S.; Foo, Norman Y.

    1988-01-01

    Any space based system, whether it is a robot arm assembling parts in space or an onboard system monitoring the space station, has to react to changes which cannot be foreseen. As a result, apart from having domain-specific knowledge as in current expert systems, a space based AI system should also have general principles of change. This paper presents a modal logic which can not only represent change but also reason with it. Three primitive operations, expansion, contraction and revision are introduced and axioms which specify how the knowledge base should change when the external world changes are also specified. Accordingly the notion of dynamic reasoning is introduced, which unlike the existing forms of reasoning, provide general principles of change. Dynamic reasoning is based on two main principles, namely minimize change and maximize coherence. A possible-world semantics which incorporates the above two principles is also discussed. The paper concludes by discussing how the dynamic reasoning system can be used to specify actions and hence form an integral part of an autonomous reasoning and planning system.

  17. Droplet-based microfluidics and the dynamics of emulsions

    NASA Astrophysics Data System (ADS)

    Baret, Jean-Christophe; Brosseau, Quentin; Semin, Benoit; Qu, Xiaopeng

    2012-02-01

    Emulsions are complex fluids already involved for a long time in a wide-range of industrial processes, such as, for example, food, cosmetics or materials synthesis [1]. More recently, applications of emulsions have been extended to new fields like biotechnology or biochemistry where the compartmentalization of compounds in emulsion droplets is used to parallelise (bio-) chemical reactions [2]. Interestingly, these applications pinpoint to fundamental questions dealing with surfactant dynamics, dynamic surface tension, hydrodynamic interactions and electrohydrodynamics. Droplet-based microfluidics is a very powerful tool to quantitatively study the dynamics of emulsions at the single droplet level or even at the single interface level: well-controlled emulsions are produced and manipulated using hydrodynamics, electrical forces, optical actuation and combination of these effects. We will describe here how droplet-based microfluidics is used to extract quantitative informations on the physical-chemistry of emulsions for a better understanding and control of the dynamics of these systems [3].[4pt] [1] J. Bibette et al. Rep. Prog. Phys., 62, 969-1033 (1999)[0pt] [2] A. Theberge et al., Angewandte Chemie Int. Ed. 49, 5846 (2010)[0pt] [3] J.-C. Baret et al., Langmuir, 25, 6088 (2009)

  18. Superelement model based parallel algorithm for vehicle dynamics

    NASA Astrophysics Data System (ADS)

    Agrawal, O. P.; Danhof, K. J.; Kumar, R.

    1994-05-01

    This paper presents a superelement model based parallel algorithm for a planar vehicle dynamics. The vehicle model is made up of a chassis and two suspension systems each of which consists of an axle-wheel assembly and two trailing arms. In this model, the chassis is treated as a Cartesian element and each suspension system is treated as a superelement. The parameters associated with the superelements are computed using an inverse dynamics technique. Suspension shock absorbers and the tires are modeled by nonlinear springs and dampers. The Euler-Lagrange approach is used to develop the system equations of motion. This leads to a system of differential and algebraic equations in which the constraints internal to superelements appear only explicitly. The above formulation is implemented on a multiprocessor machine. The numerical flow chart is divided into modules and the computation of several modules is performed in parallel to gain computational efficiency. In this implementation, the master (parent processor) creates a pool of slaves (child processors) at the beginning of the program. The slaves remain in the pool until they are needed to perform certain tasks. Upon completion of a particular task, a slave returns to the pool. This improves the overall response time of the algorithm. The formulation presented is general which makes it attractive for a general purpose code development. Speedups obtained in the different modules of the dynamic analysis computation are also presented. Results show that the superelement model based parallel algorithm can significantly reduce the vehicle dynamics simulation time.

  19. Optimizing legacy molecular dynamics software with directive-based offload

    SciTech Connect

    Michael Brown, W.; Carrillo, Jan-Michael Y.; Gavhane, Nitin; Thakkar, Foram M.; Plimpton, Steven J.

    2015-05-14

    The directive-based programming models are one solution for exploiting many-core coprocessors to increase simulation rates in molecular dynamics. They offer the potential to reduce code complexity with offload models that can selectively target computations to run on the CPU, the coprocessor, or both. In our paper, we describe modifications to the LAMMPS molecular dynamics code to enable concurrent calculations on a CPU and coprocessor. We also demonstrate that standard molecular dynamics algorithms can run efficiently on both the CPU and an x86-based coprocessor using the same subroutines. As a consequence, we demonstrate that code optimizations for the coprocessor also result in speedups on the CPU; in extreme cases up to 4.7X. We provide results for LAMMAS benchmarks and for production molecular dynamics simulations using the Stampede hybrid supercomputer with both Intel (R) Xeon Phi (TM) coprocessors and NVIDIA GPUs: The optimizations presented have increased simulation rates by over 2X for organic molecules and over 7X for liquid crystals on Stampede. The optimizations are available as part of the "Intel package" supplied with LAMMPS. (C) 2015 Elsevier B.V. All rights reserved.

  20. Optimizing legacy molecular dynamics software with directive-based offload

    DOE PAGES

    Michael Brown, W.; Carrillo, Jan-Michael Y.; Gavhane, Nitin; ...

    2015-05-14

    The directive-based programming models are one solution for exploiting many-core coprocessors to increase simulation rates in molecular dynamics. They offer the potential to reduce code complexity with offload models that can selectively target computations to run on the CPU, the coprocessor, or both. In our paper, we describe modifications to the LAMMPS molecular dynamics code to enable concurrent calculations on a CPU and coprocessor. We also demonstrate that standard molecular dynamics algorithms can run efficiently on both the CPU and an x86-based coprocessor using the same subroutines. As a consequence, we demonstrate that code optimizations for the coprocessor also resultmore » in speedups on the CPU; in extreme cases up to 4.7X. We provide results for LAMMAS benchmarks and for production molecular dynamics simulations using the Stampede hybrid supercomputer with both Intel (R) Xeon Phi (TM) coprocessors and NVIDIA GPUs: The optimizations presented have increased simulation rates by over 2X for organic molecules and over 7X for liquid crystals on Stampede. The optimizations are available as part of the "Intel package" supplied with LAMMPS. (C) 2015 Elsevier B.V. All rights reserved.« less

  1. SOA-based model for value-added ITS services delivery.

    PubMed

    Herrera-Quintero, Luis Felipe; Maciá-Pérez, Francisco; Marcos-Jorquera, Diego; Gilart-Iglesias, Virgilio

    2014-01-01

    Integration is currently a key factor in intelligent transportation systems (ITS), especially because of the ever increasing service demands originating from the ITS industry and ITS users. The current ITS landscape is made up of multiple technologies that are tightly coupled, and its interoperability is extremely low, which limits ITS services generation. Given this fact, novel information technologies (IT) based on the service-oriented architecture (SOA) paradigm have begun to introduce new ways to address this problem. The SOA paradigm allows the construction of loosely coupled distributed systems that can help to integrate the heterogeneous systems that are part of ITS. In this paper, we focus on developing an SOA-based model for integrating information technologies (IT) into ITS to achieve ITS service delivery. To develop our model, the ITS technologies and services involved were identified, catalogued, and decoupled. In doing so, we applied our SOA-based model to integrate all of the ITS technologies and services, ranging from the lowest-level technical components, such as roadside unit as a service (RSUAAS), to the most abstract ITS services that will be offered to ITS users (value-added services). To validate our model, a functionality case study that included all of the components of our model was designed.

  2. SOA-Based Model for Value-Added ITS Services Delivery

    PubMed Central

    Herrera-Quintero, Luis Felipe; Maciá-Pérez, Francisco; Marcos-Jorquera, Diego; Gilart-Iglesias, Virgilio

    2014-01-01

    Integration is currently a key factor in intelligent transportation systems (ITS), especially because of the ever increasing service demands originating from the ITS industry and ITS users. The current ITS landscape is made up of multiple technologies that are tightly coupled, and its interoperability is extremely low, which limits ITS services generation. Given this fact, novel information technologies (IT) based on the service-oriented architecture (SOA) paradigm have begun to introduce new ways to address this problem. The SOA paradigm allows the construction of loosely coupled distributed systems that can help to integrate the heterogeneous systems that are part of ITS. In this paper, we focus on developing an SOA-based model for integrating information technologies (IT) into ITS to achieve ITS service delivery. To develop our model, the ITS technologies and services involved were identified, catalogued, and decoupled. In doing so, we applied our SOA-based model to integrate all of the ITS technologies and services, ranging from the lowest-level technical components, such as roadside unit as a service (RSUAAS), to the most abstract ITS services that will be offered to ITS users (value-added services). To validate our model, a functionality case study that included all of the components of our model was designed. PMID:25019101

  3. 45 CFR 2516.100 - What is the purpose of school-based service-learning programs?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...-quality service-learning projects that engage students in meeting community needs with demonstrable... 45 Public Welfare 4 2010-10-01 2010-10-01 false What is the purpose of school-based service... (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE SCHOOL-BASED SERVICE-LEARNING PROGRAMS...

  4. 77 FR 41986 - Division of Nursing, Public Health Nursing Community Based Model of PHN Case Management Services

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-17

    ... HUMAN SERVICES Indian Health Service Division of Nursing, Public Health Nursing Community Based Model of...), Community Based Model of Public Health Nursing Case Management Services. This program is authorized under... nursing programs for the IHS Area Offices and Service Units. The IHS PHN Program is a community...

  5. Women Educational Leaders' Narratives: The Dynamics of Service Learning on Training and Transformation

    ERIC Educational Resources Information Center

    Davis, Dannielle Joy; Major, Amanda; Cook, Debra; Bell, Janel

    2015-01-01

    Service learning strengthens all involved: Students, faculty members, the community, and higher education institutions. Benefits of service learning for students include gaining real world experiences, personal and transformative outcomes (Conway, Amel, & Gerwien's, 2009), as well as higher order thinking from reflection on the experience…

  6. [Organization of occupational therapeutic service, dynamics and structure of occupational morbidity in Krasnoyarsk area].

    PubMed

    Tereshchenko, Iu A; Zakharinskaia, O N

    2010-01-01

    The authors present organizational and functional structure of occupational therapeutic service in Krasnoyarsk area, major functional divisions of the territorial occupational therapeutic center and their activities. The article covers analysis of changes in levels and structure of occupational morbidity, defines main ways to optimize occupational therapeutic service for the territorial workers.

  7. Dynamic QoS Provisioning for Ethernet-based Networks

    NASA Astrophysics Data System (ADS)

    Angelopoulos, J.; Kanonakis, K.; Leligou, H. C.; Orfanoudakis, Th.; Katsigiannis, M.

    2008-11-01

    The evolution towards packet-based access networks and the importance of quality of experience brings the need for access networks that support the offer of a wide range of multimedia services not currently available to the desired extent. Legacy networks based on circuit switching used explicit signalling that travelled to all nodes along the path to book resources before the launce of the media stream. This approach does not scale well and is not in line with the philosophy of packet networks. Still, the need to reserve resources in advance remains since real-time services have limited if any means of adjusting their rates to the prevailing network conditions and to preserve customer satisfaction the traditional preventive approach that needs accurate estimates of resource needs for the duration of the session is the only option. The paper describes a possible CAC solution based on measuring flows and enriches the network with implicit admission control (without obviating explicit control if available) and can manage resource allocation to protect quality-demanding services from degradation. The basis is a flow measurement system, which will estimate the traffic load produced by the flow and activate admission control. However, because in most cases these initial indication may well be misleading, it will be cross checked against a database of previously recorded flows per customer interface which can provide long term data on the flows leaving only a few cases that have to be corrected on the fly. The overall product is a self-learning autonomic system that supports QoS in the access network for services that do not communicate with the network layer such as, for example, peer-to-peer real-time multimedia applications.

  8. A web-based library consult service for evidence-based medicine: Technical development

    PubMed Central

    Schwartz, Alan; Millam, Gregory

    2006-01-01

    Background Incorporating evidence based medicine (EBM) into clinical practice requires clinicians to learn to efficiently gain access to clinical evidence and effectively appraise its validity. Even using current electronic systems, selecting literature-based data to solve a single patient-related problem can require more time than practicing physicians or residents can spare. Clinical librarians, as informationists, are uniquely suited to assist physicians in this endeavor. Results To improve support for evidence-based practice, we have developed a web-based EBM library consult service application (LCS). Librarians use the LCS system to provide full text evidence-based literature with critical appraisal in response to a clinical question asked by a remote physician. LCS uses an entirely Free/Open Source Software platform and will be released under a Free Software license. In the first year of the LCS project, the software was successfully developed and a reference implementation put into active use. Two years of evaluation of the clinical, educational, and attitudinal impact on physician-users and librarian staff are underway, and expected to lead to refinement and wide dissemination of the system. Conclusion A web-based EBM library consult model may provide a useful way for informationists to assist clinicians, and is feasible to implement. PMID:16542453

  9. An investigation of dynamic processes in selenium based chalcogenide glasses

    NASA Astrophysics Data System (ADS)

    Gulbiten, Ozgur

    Owing to their excellent infrared transmittance and good rheological properties, selenium based chalcogenide glasses have been materials of choice for a number of technological applications. However, chalcogenide glasses can undergo substantial structural relaxation even at room temperature due to their low glass transition temperatures. The origins of these dynamic processes and their correlation to the glass structure is therefore of fundamental and practical interest. In particular, a deep understanding of the dynamic response near the glass transition region could help elucidate the mechanism of these structural relaxation processes. The correlation between structure and dynamic properties of selenium based glass systems were therefore investigated. NMR and Raman spectroscopy measurements reveal that the structure of Asx Se1-x glass follow the chain crossing model in selenium-rich glasses but contain increasing amounts of cage molecules in arsenic-rich compositions. This structural pattern leads to systematic extrema in physical properties at the stoichiometric composition As40Se60. The dynamic response of AsxSe1-x glasses investigated by heat capacity spectroscopy shows two minima in melt fragility as a function of composition which correlate well with the dimensionality of the glassy network. The structure evolves from 2D to 3D during crosslinking of selenium chains by arsenic but reduces into a 2D layer-like structure at the stoichiometric composition. Upon precipitation of arsenic-rich cages the network first reverts back to 3D and eventually becomes a mix of 2D and 0D structural units. The presence of molecular clusters in the network is evidenced by a strong bimodal dynamic response at high arsenic contents. NMR and Raman spectroscopy measurements of GexSe1-x glasses suggest a structure composed of aggregated tetrahedral units and long selenium chains with little or no connectivity. Distinct dynamic responses of these two separated structural motifs are

  10. The Evaluation of Counseling and Guidance Services Based on Teacher Views and Their Prediction Based on Some Variables

    ERIC Educational Resources Information Center

    Yuksel-Sahin, Fulya

    2009-01-01

    This study evaluated psychological counseling and guidance services based on elementary and secondary education teachers' views. Participants were 204 teachers. "School Guidance Services Scale" and "Teacher Personal Information Form" were used for gathering the necessary information. Percentage calculations and multiple regression analysis were…

  11. Rumor diffusion in an interests-based dynamic social network.

    PubMed

    Tang, Mingsheng; Mao, Xinjun; Guessoum, Zahia; Zhou, Huiping

    2013-01-01

    To research rumor diffusion in social friend network, based on interests, a dynamic friend network is proposed, which has the characteristics of clustering and community, and a diffusion model is also proposed. With this friend network and rumor diffusion model, based on the zombie-city model, some simulation experiments to analyze the characteristics of rumor diffusion in social friend networks have been conducted. The results show some interesting observations: (1) positive information may evolve to become a rumor through the diffusion process that people may modify the information by word of mouth; (2) with the same average degree, a random social network has a smaller clustering coefficient and is more beneficial for rumor diffusion than the dynamic friend network; (3) a rumor is spread more widely in a social network with a smaller global clustering coefficient than in a social network with a larger global clustering coefficient; and (4) a network with a smaller clustering coefficient has a larger efficiency.

  12. Prediction-based Dynamic Energy Management in Wireless Sensor Networks

    PubMed Central

    Wang, Xue; Ma, Jun-Jie; Wang, Sheng; Bi, Dao-Wei

    2007-01-01

    Energy consumption is a critical constraint in wireless sensor networks. Focusing on the energy efficiency problem of wireless sensor networks, this paper proposes a method of prediction-based dynamic energy management. A particle filter was introduced to predict a target state, which was adopted to awaken wireless sensor nodes so that their sleep time was prolonged. With the distributed computing capability of nodes, an optimization approach of distributed genetic algorithm and simulated annealing was proposed to minimize the energy consumption of measurement. Considering the application of target tracking, we implemented target position prediction, node sleep scheduling and optimal sensing node selection. Moreover, a routing scheme of forwarding nodes was presented to achieve extra energy conservation. Experimental results of target tracking verified that energy-efficiency is enhanced by prediction-based dynamic energy management.

  13. Process-based design of dynamical biological systems

    PubMed Central

    Tanevski, Jovan; Todorovski, Ljupčo; Džeroski, Sašo

    2016-01-01

    The computational design of dynamical systems is an important emerging task in synthetic biology. Given desired properties of the behaviour of a dynamical system, the task of design is to build an in-silico model of a system whose simulated be- haviour meets these properties. We introduce a new, process-based, design methodology for addressing this task. The new methodology combines a flexible process-based formalism for specifying the space of candidate designs with multi-objective optimization approaches for selecting the most appropriate among these candidates. We demonstrate that the methodology is general enough to both formulate and solve tasks of designing deterministic and stochastic systems, successfully reproducing plausible designs reported in previous studies and proposing new designs that meet the design criteria, but have not been previously considered. PMID:27686219

  14. Percolation-based precursors of transitions in dynamical systems

    NASA Astrophysics Data System (ADS)

    Rodriguez Mendez, Victor Manuel; Eguiluz, Victor M.; Ramasco, Jose J.; Hernandez-Garcia, Emilio

    2015-04-01

    Transitions in complex dynamical systems are ubiquitous in nature. Finding leading indicators in such systems is a fundamental task in many areas of science, such as financial markets, the extinction of species or climate change studies. Here we propose a new framework to study systems close to a bifurcation point by analyzing topological properties, based on clusters and percolation, of functional networks defined from the time series. The use of networks allows us for a global parametrization of the system going far beyond simple two-point relations (classical correlations). The generality and versatility of the cluster-based method to forecast transitions is shown in two different kinds of data. In one hand, three theoretical dynamical systems displaying very different transitions and crossovers were used as a test bed. On the other hand, we have used the field of surface air temperature in the NINO 3.4 zone. In this new approach, critical transitions are identified before they occur.

  15. Tensor-based Dictionary Learning for Dynamic Tomographic Reconstruction

    PubMed Central

    Tan, Shengqi; Zhang, Yanbo; Wang, Ge; Mou, Xuanqin; Cao, Guohua; Wu, Zhifang; Yu, Hengyong

    2015-01-01

    In dynamic computed tomography (CT) reconstruction, the data acquisition speed limits the spatio-temporal resolution. Recently, compressed sensing theory has been instrumental in improving CT reconstruction from far few-view projections. In this paper, we present an adaptive method to train a tensor-based spatio-temporal dictionary for sparse representation of an image sequence during the reconstruction process. The correlations among atoms and across phases are considered to capture the characteristics of an object. The reconstruction problem is solved by the alternating direction method of multipliers. To recover fine or sharp structures such as edges, the nonlocal total variation is incorporated into the algorithmic framework. Preclinical examples including a sheep lung perfusion study and a dynamic mouse cardiac imaging demonstrate that the proposed approach outperforms the vectorized dictionary-based CT reconstruction in the case of few-view reconstruction. PMID:25779991

  16. Tensor-based dictionary learning for dynamic tomographic reconstruction

    NASA Astrophysics Data System (ADS)

    Tan, Shengqi; Zhang, Yanbo; Wang, Ge; Mou, Xuanqin; Cao, Guohua; Wu, Zhifang; Yu, Hengyong

    2015-04-01

    In dynamic computed tomography (CT) reconstruction, the data acquisition speed limits the spatio-temporal resolution. Recently, compressed sensing theory has been instrumental in improving CT reconstruction from far few-view projections. In this paper, we present an adaptive method to train a tensor-based spatio-temporal dictionary for sparse representation of an image sequence during the reconstruction process. The correlations among atoms and across phases are considered to capture the characteristics of an object. The reconstruction problem is solved by the alternating direction method of multipliers. To recover fine or sharp structures such as edges, the nonlocal total variation is incorporated into the algorithmic framework. Preclinical examples including a sheep lung perfusion study and a dynamic mouse cardiac imaging demonstrate that the proposed approach outperforms the vectorized dictionary-based CT reconstruction in the case of few-view reconstruction.

  17. Process-based design of dynamical biological systems

    NASA Astrophysics Data System (ADS)

    Tanevski, Jovan; Todorovski, Ljupčo; Džeroski, Sašo

    2016-09-01

    The computational design of dynamical systems is an important emerging task in synthetic biology. Given desired properties of the behaviour of a dynamical system, the task of design is to build an in-silico model of a system whose simulated be- haviour meets these properties. We introduce a new, process-based, design methodology for addressing this task. The new methodology combines a flexible process-based formalism for specifying the space of candidate designs with multi-objective optimization approaches for selecting the most appropriate among these candidates. We demonstrate that the methodology is general enough to both formulate and solve tasks of designing deterministic and stochastic systems, successfully reproducing plausible designs reported in previous studies and proposing new designs that meet the design criteria, but have not been previously considered.

  18. Ultrafast dynamics in DNA base pairs following ultraviolet excitation.

    NASA Astrophysics Data System (ADS)

    Orr-Ewing, Andrew

    2015-03-01

    Photo-protective mechanisms in DNA are essential to maintain the integrity of the genetic code by preventing damage from absorption of solar ultraviolet (UV) radiation. We have used time-resolved infra-red (TRIR) spectroscopy to observe the dynamics of Watson-Crick nucleobase pairs following absorption of femtosecond UV laser pulses. The base pairs are prepared as nucleosides in solution, and photo-induced dynamics are probed in the carbonyl and N-H bond stretching regions using broadband IR pulses with picosecond time resolution. Results will be presented for the guanine-cytosine (G-C) base pair, contrasting the rapid recovery of ground-state products (the photo-protection pathway) with formation of other photoproducts which might represent photo-damage mechanisms. This work is a collaboration with the group of Prof F. Temps (Christian-Albrechts-Universitat zu Kiel). This research is supported by ERC Advanced Grant 290966 CAPRI.

  19. Activity-based costing in services: literature bibliometric review.

    PubMed

    Stefano, Nara Medianeira; Filho, Nelson Casarotto

    2013-12-01

    This article is aimed at structuring a bibliography portfolio to treat the application of the ABC method in service and contribute to discussions within the scientific community. The methodology followed a three-stage procedure: Planning, execution and Synthesis. Also, the process ProKnow-C (Knowledge Process Development - Constructivist) was used in the execution stage. International databases were used to collect information (ISI Web of Knowledge and Scopus). As a result, we obtained a bibliography portfolio of 21 articles (with scientific recognition) dealing with the proposed theme.

  20. Oregon School-Based Health Centers 1996-1997 Services Report.

    ERIC Educational Resources Information Center

    Alexander, Tammis; Nystrom, Robert J.; Spitz, Lauren

    School based health centers (SBHC) are effective providers of health services and education because they are easy for students to access, they take an integrated and developmentally appropriate approach to meeting health needs, and they are prevention-oriented. This report describes the 1996-1997 services provided in 15 of 19 state-supported…

  1. Faith-Based Human Services Initiatives: Considerations for Social Work Practice and Theory

    ERIC Educational Resources Information Center

    Tangenberg, Kathleen M.

    2005-01-01

    Faith-based human services initiatives present numerous challenges to professional social work. This article explores ways a theoretical integration of ecosystems and structuration perspectives may help social workers navigate complex ideological and practical implications of changing service delivery policies. The article highlights diversity…

  2. The Impact of Project-Based Learning on Pre-Service Teachers' Technology Attitudes and Skills

    ERIC Educational Resources Information Center

    Alexander, Curby; Knezek, Gerald; Christensen, Rhonda; Tyler-Wood, Tandra; Bull, Glen

    2014-01-01

    Researchers in this study looked at the effect of content-specific, technology-rich project-based learning activities on EC-8 pre-service teachers' competencies and skills, as well as pre-service teacher's attitudes toward science, technology, engineering and mathematics (STEM). Researchers employed a quantitative design involving participants in…

  3. Developing and Establishing School-Based Sexual Health Services: Issues for School Nursing Practice

    ERIC Educational Resources Information Center

    Hayter, Mark; Owen, Jenny; Cooke, Jo

    2012-01-01

    School-based sexual health clinics are emerging as one of the key ways to promote sexual health among young people, and school nurses play an important role in developing and delivering these services. This study used a qualitative design to explore the experiences of health professionals and policy makers involved in setting up such services in…

  4. Developing the Research Database for the School-Based Youth Services Program. Administrative Summary.

    ERIC Educational Resources Information Center

    Veale, James R.

    The School-based Youth Services Program (SBYSP) provides a one-stop location or center accessible to teens within or close to the public school. It is designed to help at-risk students by coordinating services between the community and the school, with the goal of keeping students in school and helping them gain skills that lead to employment,…

  5. The Relative Benefits and Cost of Medicaid Home- and Community-Based Services in Florida

    ERIC Educational Resources Information Center

    Mitchell, Glenn, II; Salmon, Jennifer R.; Polivka, Larry; Soberon-Ferrer, Horacio

    2006-01-01

    Purpose: We compared inpatient days, nursing home days, and total Medicaid claims for five Medicaid-funded home- and community-based services (HCBS) programs for in-home and assisted living services in Florida. Design and Methods: We studied a single cohort of Medicaid enrollees in Florida aged 60 and older, who were enrolled for the first time in…

  6. Home and Community Based Services (HCBS) Waivers: A Nationwide Study of the States

    ERIC Educational Resources Information Center

    Rizzolo, Mary C.; Friedman, Carli; Lulinski-Norris, Amie; Braddock, David

    2013-01-01

    In fiscal year (FY) 2009, the Medicaid program funded over 75% of all publicly funded long-term supports and services (LTSS) for individuals with intellectual and developmental disabilities (IDD) in the United States (Braddock et al., 2011). The majority of spending was attributed to the Home and Community Based Services (HCBS) Waiver program. In…

  7. 34 CFR 361.54 - Participation of individuals in cost of services based on financial need.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 34 Education 2 2011-07-01 2010-07-01 true Participation of individuals in cost of services based on financial need. 361.54 Section 361.54 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF SPECIAL EDUCATION AND REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION...

  8. 34 CFR 361.54 - Participation of individuals in cost of services based on financial need.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Participation of individuals in cost of services based on financial need. 361.54 Section 361.54 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF SPECIAL EDUCATION AND REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION...

  9. Service Users and Carers: Preparing to Be Involved in Work-Based Practice Assessment

    ERIC Educational Resources Information Center

    Dearnley, Christine; Coulby, Ceridwen; Rhodes, Christine; Taylor, Jill; Coates, Catherine

    2011-01-01

    This paper will provide an overview of the specific issues related to involving service users and carers in work-based practice assessment of health and social care students. The outcomes of a shared workshop that involved service users and carers, practice assessors and students in the development of an interprofessional assessment tool, will be…

  10. 76 FR 60112 - Consent Based Social Security Number Verification (CBSV) Service

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-28

    ... addition to the benefit of providing high volume, centralized SSN verification services to the business community in a secure manner, CBSV provides us with cost and workload management benefits. New Information... ADMINISTRATION Consent Based Social Security Number Verification (CBSV) Service AGENCY: Social...

  11. Caregiver Factors Predicting Service Utilization among Youth Participating in a School-Based Mental Health Intervention

    ERIC Educational Resources Information Center

    Burnett-Zeigler, Inger; Lyons, John S.

    2010-01-01

    Large numbers of children and adolescents experience diagnosable psychiatric disturbances; however, the majority of those with need do not utilize mental health services. Characteristics of caregivers are important predictors of which youth will access and continue to use services over time. In recent years school-based mental health intervention…

  12. Ethnic Disparities in School-Based Behavioral Health Service Use for Children with Psychiatric Disorders

    ERIC Educational Resources Information Center

    Locke, Jill; Kang-Yi, Christina D.; Pellecchia, Melanie; Marcus, Steven; Hadley, Trevor; Mandell, David S.

    2017-01-01

    Background: We examined racial/ethnic disparities in school-based behavioral health service use for children with psychiatric disorders. Methods: Medicaid claims data were used to compare the behavioral healthcare service use of 23,601 children aged 5-17 years by psychiatric disorder (autism, attention deficit hyperactivity disorder [ADHD],…

  13. Prison-Based Relationship Counselling: Service User Perceptions and Implications for Resettlement

    ERIC Educational Resources Information Center

    Meek, Rosie

    2011-01-01

    This article is based on a brief evaluation carried out on behalf of the relationship counselling service, Relate, regarding the delivery of a pilot specialist counselling service for adult male prisoners at HMP Ford, a low security "category D" prison in the South East of England. At the heart of the research lies a focus on the…

  14. The Role of Technology: Community Based Service-Learning Projects on Ethical Development

    ERIC Educational Resources Information Center

    Ruso, Nazenin

    2012-01-01

    This study explores the utility of CBSL (community based service-learning) projects as a teaching method of ethics which this process supported by online communication tools in order to enhance progress of service learning and ethical development of undergraduate students and gather data during the research process. This study consists of an…

  15. Pre-Service Teacher Perceptions of Using Problem Based Learning in Science Investigations

    ERIC Educational Resources Information Center

    Pepper, Coral

    2013-01-01

    Introducing Problem Based Learning (PBL) to a cohort of science education pre-service teachers enabled them to engage in a widely used learning and teaching strategy helpful to align university courses with the professional work they are expected to undertake on graduation. Almost fifty pre-service teachers participated in the study, focussed on…

  16. The Entrepreneurial Public Library: The Policy and Practice of Fee-Based Services.

    ERIC Educational Resources Information Center

    Butterworth, Margaret

    This paper discusses fee-based services in public libraries. The first section examines examples of charging for public library services in three countries: the United Kingdom, the Republic of Ireland; and New Zealand. The intention is to consider the circumstances in which charging was introduced, the public's response in terms of the effect on…

  17. Implementing Secondary Transition Evidence-Based Practices: A Multi-State Survey of Transition Service Providers

    ERIC Educational Resources Information Center

    Mazzotti, Valerie L.; Plotner, Anthony J.

    2016-01-01

    Inadequate transition outcomes for youth with disabilities have produced a call for enhanced transition service delivery that includes implementation of evidence-based practices (EBPs). However, research indicates transition service providers still lack the knowledge and skills to effectively implement EBPs to ensure youth with disabilities…

  18. Rheticus: an automatic cloud-based geo-information service platform for territorial monitoring

    NASA Astrophysics Data System (ADS)

    Samarelli, Sergio; Lorusso, Antonio Pio; Agrimano, Luigi; Nutricato, Raffaele; Bovenga, Fabio; Nitti, Davide Oscar; Chiaradia, Maria Teresa

    2016-10-01

    Rheticus® is an innovative cloud-based data and services hub able to deliver Earth Observation added-value products through automatic complex processes and, if appropriate, a minimum interaction with human operators. In this paper, we outlines the capabilities of the "Rheticus® Displacement" service, designed for geohazard and infrastructure monitoring through Multi-Temporal SAR Interferometry techniques.

  19. Public Service Occupations. Practical Arts. Instructor's Manual. Competency-Based Vocational Education.

    ERIC Educational Resources Information Center

    Keeton, Martha; And Others

    This manual provides curriculum materials for implementing a career exploration class in public service occupations within a Practical Arts Education program for middle/junior high school students. Introductory materials include the program master sequence, a list of public service occupations, and an overview of the competency-based instructional…

  20. 5 CFR 315.712 - Conversion based on service as a Federal Career Intern.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Career Intern. 315.712 Section 315.712 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS CAREER AND CAREER-CONDITIONAL EMPLOYMENT Conversion to Career or Career-Conditional Employment From Other Types of Employment § 315.712 Conversion based on service as a Federal Career...

  1. Mental Health Services in School-Based Health Centers: Systematic Review

    ERIC Educational Resources Information Center

    Bains, Ranbir Mangat; Diallo, Ana F.

    2016-01-01

    Mental health issues affect 20-25% of children and adolescents, of which few receive services. School-based health centers (SBHCs) provide access to mental health services to children and adolescents within their schools. A systematic review of literature was undertaken to review evidence on the effectiveness of delivery of mental health services…

  2. Location service for wireless network using improved RSS-based cellular localisation

    NASA Astrophysics Data System (ADS)

    Fayaz, Sara; Sarrafian, Sara

    2014-06-01

    Value-added services, especially in mobile environments, have recently become the key component of making more profit and attracting more subscribers. One of the most commonly used such service is location-based advertiser services. The main issue which should be considered in providing such services is determining the position of the mobile terminals precisely. In this paper, one pattern recognition localisation method based on the signal strength appropriated for implementing a location-based service is presented. The main aim is to introduce some practical solutions to decrease error and computational load and also eliminate the necessity of updating the database. Practical results illustrate high accuracy of this technique and its suitability to apply in such services. The mean error declines to 9.7 m and mean error corresponding to CDF = 67% and CDF = 95% are less than 11 m and 23 m, respectively. We also present a location-based advertising service, in which the customer's interests and local time are considered, in order to enhance the efficiency and individualism of this service.

  3. 38 CFR 3.1704 - Burial allowance based on service-connected death.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... service-connected death. 3.1704 Section 3.1704 Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF....1704 Burial allowance based on service-connected death. Pt. 3, Subpt. B, Nt. (a) General rule. VA will... of the veteran's death that the expenses incurred were less than that amount. Payment of the...

  4. Beyond the Classroom: Experiences of a School-Based Services Project.

    ERIC Educational Resources Information Center

    Iscoe, Louise K.

    The Hogg Foundation for Mental Health created the School of the Future (SoF) project to enable selected Texas schools to coordinate and implement school-based social and health services on their campuses and to demonstrate the effectiveness of this method of service delivery by evaluating the project. The SoF operated in four sites, each with a…

  5. Revisiting the School of the Future: The Evolution of a School-Based Services Project.

    ERIC Educational Resources Information Center

    Iscoe, Louise K.; Keir, Scott S.

    The Hogg Foundation for Mental Health created the School of the Future (SoF) project to enable selected Texas schools to coordinate and implement school-based social and health services on their campuses and to demonstrate the effectiveness of this method of service delivery by evaluating the project. This report documents the evolution of the SoF…

  6. A Blueprint for School-Based Services. School of the Future: Dallas.

    ERIC Educational Resources Information Center

    Iscoe, Louise

    The Hogg Foundation for Mental Health created the School of the Future (SoF) project to enable selected Texas schools to coordinate and implement school-based social and health services on their campuses and to demonstrate the effectiveness of this method of service delivery by evaluating the project. At each of four urban sites consisting of a…

  7. Support for Offering Sexual Health Services through School-Based Health Clinics

    ERIC Educational Resources Information Center

    Moore, Michele Johnson; Barr, Elissa; Wilson, Kristina; Griner, Stacey

    2016-01-01

    Background: Numerous studies document support for sexuality education in the schools. However, there is a dearth of research assessing support for sexual health services offered through school-based health clinics (SBHCs). The purpose of this study was to assess voter support for offering 3 sexual health services (STI/HIV testing, STI/HIV…

  8. Contributions of School-Based Parenting and Family Literacy Centres in an Early Childhood Service System

    ERIC Educational Resources Information Center

    Underwood, Kathryn; Trent-Kratz, Marion

    2015-01-01

    Increasingly, governments are seeking ways to integrate early childhood education and care services as a social policy strategy to maximize child and family outcomes. This study examines the role of a school-based parenting and family literacy program to a system of services in one community in Ontario, Canada. Using an appreciative inquiry…

  9. 76 FR 14034 - Proposed Collection; Comment Request; NCI Cancer Genetics Services Directory Web-Based...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-15

    ... HUMAN SERVICES National Institutes of Health Proposed Collection; Comment Request; NCI Cancer Genetics... Management and Budget (OMB) for review and approval. Proposed Collection: Title: NCI Cancer Genetics Services... application form and the Web-based update mailer is to collect information about genetics professionals to...

  10. Pre-Service Mathematics Teachers' Learning and Teaching of Activity-Based Lessons Supported with Spreadsheets

    ERIC Educational Resources Information Center

    Agyei, Douglas D.; Voogt, Joke M.

    2016-01-01

    In this study, 12 pre-service mathematics teachers worked in teams to develop their knowledge and skills in using teacher-led spreadsheet demonstrations to help students explore mathematics concepts, stimulate discussions and perform authentic tasks through activity-based lessons. Pre-service teachers' lesson plans, their instruction of the…

  11. Rural Older Adults' Access Barriers to In-Home and Community-Based Services

    ERIC Educational Resources Information Center

    Li, Hong

    2006-01-01

    This study identified specific access barriers to seven commonly used in-home and community-based services (CBS) and examined factors that were related to barriers to these services. The data used in this study were extracted from the 1999 National Long Term Care Survey and included 283 dyads of rural older adults and their caregivers. The CBS to…

  12. School Psychologists' Report of School-Based Mental Health Service Programs across Pennsylvania School Systems

    ERIC Educational Resources Information Center

    Cross, Ajani Yanea

    2013-01-01

    This study explored the mental health needs and services of children and adolescents within Pennsylvania school communities; this included a focus upon evidence-based counseling approaches. Relationships were analyzed between population density, SES status, grade level and the type of mental health issues serviced. Survey data from 314 respondents…

  13. 5 CFR 315.712 - Conversion based on service as a Federal Career Intern.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Career Intern. 315.712 Section 315.712 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS CAREER AND CAREER-CONDITIONAL EMPLOYMENT Conversion to Career or Career-Conditional Employment From Other Types of Employment § 315.712 Conversion based on service as a Federal Career...

  14. 5 CFR 315.712 - Conversion based on service as a Federal Career Intern.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Career Intern. 315.712 Section 315.712 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS CAREER AND CAREER-CONDITIONAL EMPLOYMENT Conversion to Career or Career-Conditional Employment From Other Types of Employment § 315.712 Conversion based on service as a Federal Career...

  15. Support for School-Based Reproductive Health Services among South Carolina Voters.

    ERIC Educational Resources Information Center

    Lindley, Lisa L.; Reininger, Belinda M.; Saunders, Ruth P.

    2001-01-01

    Surveyed South Carolina registered voters regarding level of support for school-based reproductive health services. Most voters supported providing contraceptive information, counseling, and referrals to students. They were less supportive of providing students with more direct and possibly invasive reproductive health services at school. Few…

  16. 34 CFR 361.54 - Participation of individuals in cost of services based on financial need.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 34 Education 2 2014-07-01 2013-07-01 true Participation of individuals in cost of services based on financial need. 361.54 Section 361.54 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF SPECIAL EDUCATION AND REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION...

  17. 34 CFR 361.54 - Participation of individuals in cost of services based on financial need.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 34 Education 2 2013-07-01 2013-07-01 false Participation of individuals in cost of services based on financial need. 361.54 Section 361.54 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF SPECIAL EDUCATION AND REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION...

  18. Use and Evaluation of Web-Based Professional Development Services across Participant Levels of Support

    ERIC Educational Resources Information Center

    Whitaker, Steve; Kinzie, Mable; Kraft-Sayre, Marcia E.; Mashburn, Andrew; Pianta, Robert C.

    2007-01-01

    When participating in a large-scale, web-based professional development program, to what degree do teachers participate? How useful do they find the program? To what degree do they feel supported in their efforts? What are the associations between participation, evaluation of services, and the level of service teachers receive? MyTeachingPartner…

  19. Accuracy assessment of the global ionospheric model over the Southern Ocean based on dynamic observation

    NASA Astrophysics Data System (ADS)

    Luo, Xiaowen; Xu, Huajun; Li, Zishen; Zhang, Tao; Gao, Jinyao; Shen, Zhongyan; Yang, Chunguo; Wu, Ziyin

    2017-02-01

    The global ionospheric model based on the reference stations of the Global Navigation Satellite System (GNSS) of the International GNSS Services is presently the most commonly used products of the global ionosphere. It is very important to comprehensively analyze and evaluate the accuracy and reliability of the model for the reasonable use of this kind of ionospheric product. In terms of receiver station deployment, this work is different from the traditional performance evaluation of the global ionosphere model based on observation data of ground-based static reference stations. The preliminary evaluation and analysis of the the global ionospheric model was conducted with the dynamic observation data across different latitudes over the southern oceans. The validation results showed that the accuracy of the global ionospheric model over the southern oceans is about 5 TECu, which deviates from the measured ionospheric TEC by about -0.6 TECu.

  20. How does outcome-based funding affect service delivery? An analysis of consequences within employment services for people living with serious mental illness.

    PubMed

    Gewurtz, Rebecca E; Cott, Cheryl; Rush, Brian; Kirsh, Bonnie

    2015-01-01

    This paper explores the impact of outcome-based funding on service delivery within employment services for people with serious mental illness. It draws on a case study of a policy change in the provincial disability support program in Ontario, Canada where funding for employment programs and services was changed from a fee-for-service to an outcome-based model. The findings highlight that the financial imperative for programs to meet employment targets in order to secure their funding has shifted the focus away from the provision of pre-employment supports to job development and job placements. However, there remains little attention to job matching and career development, and there is concern about access to services among those with complex barriers to employment. There is a need to reconcile tensions between the goals of outcome-based funding and on-the-ground service delivery to promote ongoing innovation in employment services for people with serious mental illness.

  1. Structure and dynamics of aqueous solutions from PBE-based first-principles molecular dynamics simulations

    NASA Astrophysics Data System (ADS)

    Pham, Tuan Anh; Ogitsu, Tadashi; Lau, Edmond Y.; Schwegler, Eric

    2016-10-01

    Establishing an accurate and predictive computational framework for the description of complex aqueous solutions is an ongoing challenge for density functional theory based first-principles molecular dynamics (FPMD) simulations. In this context, important advances have been made in recent years, including the development of sophisticated exchange-correlation functionals. On the other hand, simulations based on simple generalized gradient approximation (GGA) functionals remain an active field, particularly in the study of complex aqueous solutions due to a good balance between the accuracy, computational expense, and the applicability to a wide range of systems. Such simulations are often performed at elevated temperatures to artificially "correct" for GGA inaccuracies in the description of liquid water; however, a detailed understanding of how the choice of temperature affects the structure and dynamics of other components, such as solvated ions, is largely unknown. To address this question, we carried out a series of FPMD simulations at temperatures ranging from 300 to 460 K for liquid water and three representative aqueous solutions containing solvated Na+, K+, and Cl- ions. We show that simulations at 390-400 K with the Perdew-Burke-Ernzerhof (PBE) exchange-correlation functional yield water structure and dynamics in good agreement with experiments at ambient conditions. Simultaneously, this computational setup provides ion solvation structures and ion effects on water dynamics consistent with experiments. Our results suggest that an elevated temperature around 390-400 K with the PBE functional can be used for the description of structural and dynamical properties of liquid water and complex solutions with solvated ions at ambient conditions.

  2. [Development of a portable dynamic state ECG based on DSP].

    PubMed

    Song, Li; Meng, Qing-jian; Zhang, Guang-yu; Cao, Wei-fang

    2009-11-01

    The Portable dynamic state electrocardiogram collecting system is introduced by using TMS302VC5402, TLC320AD50C, liquid crystal display model, and so on. This dissertation describes the work principle of the system and uses the united algorithm based on wavelet to identify and locate the ECG characteristic waves. This system has as follows of advantages: big memory, low noise,high common mode rejection ratio, the low power consume,the long record time etc.

  3. Dynamic Photonic Materials Based on Liquid Crystals (Postprint)

    DTIC Science & Technology

    2013-09-01

    AFRL-RX-WP-JA-2015-0059 DYNAMIC PHOTONIC MATERIALS BASED ON LIQUID CRYSTALS (POSTPRINT) Luciano De Sio and Cesare Umeton University...ON LIQUID CRYSTALS (POSTPRINT) 5a. CONTRACT NUMBER In-House 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 61102F 6. AUTHOR(S) (see back...10.1016/B978-0-444-62644-8.00001-7. 14. ABSTRACT Liquid crystals, combining optical non-linearity and self-organizing properties with fluidity, and being

  4. Reputation Revision Method for Selecting Cloud Services Based on Prior Knowledge and a Market Mechanism

    PubMed Central

    Wu, Qingtao; Zhang, Xulong; Zhang, Mingchuan; Lou, Ying; Zheng, Ruijuan; Wei, Wangyang

    2014-01-01

    The trust levels of cloud services should be evaluated to ensure their reliability. The effectiveness of these evaluations has major effects on user satisfaction, which is increasingly important. However, it is difficult to provide objective evaluations in open and dynamic environments because of the possibilities of malicious evaluations, individual preferences, and intentional praise. In this study, we propose a novel unfair rating filtering method for a reputation revision system. This method uses prior knowledge as the basis of similarity when calculating the average rating, which facilitates the recognition and filtering of unfair ratings. In addition, the overall performance is increased by a market mechanism that allows users and service providers to adjust their choice of services and service configuration in a timely manner. The experimental results showed that this method filtered unfair ratings in an effective manner, which greatly improved the precision of the reputation revision system. PMID:24696650

  5. An Advanced Orbiting Systems Approach to Quality of Service in Space-Based Intelligent Communication Networks

    NASA Technical Reports Server (NTRS)

    Riha, Andrew P.

    2005-01-01

    As humans and robotic technologies are deployed in future constellation systems, differing traffic services will arise, e.g., realtime and non-realtime. In order to provide a quality of service framework that would allow humans and robotic technologies to interoperate over a wide and dynamic range of interactions, a method of classifying data as realtime or non-realtime is needed. In our paper, we present an approach that leverages the Consultative Committee for Space Data Systems (CCSDS) Advanced Orbiting Systems (AOS) data link protocol. Specifically, we redefine the AOS Transfer Frame Replay Flag in order to provide an automated store-and-forward approach on a per-service basis for use in the next-generation Interplanetary Network. In addition to addressing the problem of intermittent connectivity and associated services, we propose a follow-on methodology for prioritizing data through further modification of the AOS Transfer Frame.

  6. Service-learning-based instruction enhances students' perceptions of their abilities to engage in evidence-based practice.

    PubMed

    Atler, Karen; Gavin, William J

    2010-01-01

    ABSTRACT Education leaders in occupational therapy (OT) propose that active learning is one means to developing critical thinking skills essential for successful integration of knowledge into evidence-based practice. This study examines the impact of one type of active learning, service-learning, on students' perceptions of their knowledge, skills, and confidence in their abilities to provide OT services to adults with neurological conditions. Change in OT students' (n == 43) perceptions before and after engagement in service-learning were assessed using quantitative and qualitative data in a triangulation mixed-methods design. Results support previous studies indicating that service-learning can influence positive gains in student knowledge and confidence.

  7. Mobile Messaging Services-Based Personal Electrocardiogram Monitoring System

    PubMed Central

    Tahat, Ashraf A.

    2009-01-01

    A mobile monitoring system utilizing Bluetooth and mobile messaging services (MMS/SMSs) with low-cost hardware equipment is proposed. A proof of concept prototype has been developed and implemented to enable transmission of an Electrocardiogram (ECG) signal and body temperature of a patient, which can be expanded to include other vital signs. Communication between a mobile smart-phone and the ECG and temperature acquisition apparatus is implemented using the popular personal area network standard specification Bluetooth. When utilizing MMS for transmission, the mobile phone plots the received ECG signal and displays the temperature using special application software running on the client mobile phone itself, where the plot can be captured and saved as an image before transmission. Alternatively, SMS can be selected as a transmission means, where in this scenario, dedicated application software is required at the receiving device. The experimental setup can be operated for monitoring from anywhere in the globe covered by a cellular network that offers data services. PMID:19707531

  8. Antiferromagnetic order and spin dynamics in iron-based superconductors

    NASA Astrophysics Data System (ADS)

    Dai, Pengcheng

    2015-07-01

    High-transition temperature (high-Tc) superconductivity in the iron pnictides or chalcogenides emerges from the suppression of the static antiferromagnetic order in their parent compounds, similar to copper oxide superconductors. This raises a fundamental question concerning the role of magnetism in the superconductivity of these materials. Neutron scattering, a powerful probe to study the magnetic order and spin dynamics, plays an essential role in determining the relationship between magnetism and superconductivity in high-Tc superconductors. The rapid development of modern neutron time-of-flight spectrometers allows a direct determination of the spin dynamical properties of iron-based superconductors throughout the entire Brillouin zone. In this paper, an overview is presented of the neutron scattering results on iron-based superconductors, focusing on the evolution of spin-excitation spectra as a function of electron and hole doping and isoelectronic substitution. Spin dynamical properties of iron-based superconductors are compared with those of copper oxide and heavy fermion superconductors and the common features of spin excitations in these three families of unconventional superconductors and their relationship with superconductivity are discussed.

  9. The value of Web-based library services at Cedars-Sinai Health System.

    PubMed Central

    Halub, L P

    1999-01-01

    Cedars-Sinai Medical Library/Information Center has maintained Web-based services since 1995 on the Cedars-Sinai Health System network. In that time, the librarians have found the provision of Web-based services to be a very worthwhile endeavor. Library users value the services that they access from their desktops because the services save time. They also appreciate being able to access services at their convenience, without restriction by the library's hours of operation. The library values its Web site because it brings increased visibility within the health system, and it enables library staff to expand services when budget restrictions have forced reduced hours of operation. In creating and maintaining the information center Web site, the librarians have learned the following lessons: consider the design carefully; offer what services you can, but weigh the advantages of providing the services against the time required to maintain them; make the content as accessible as possible; promote your Web site; and make friends in other departments, especially information services. PMID:10427423

  10. Predictors of client engagement and attrition in home-based child maltreatment prevention services.

    PubMed

    Damashek, Amy; Doughty, Debby; Ware, Lisa; Silovsky, Jane

    2011-02-01

    High rates of program attrition in home-based family support and child maltreatment prevention services are common. Researchexamining factors related to family engagement (i.e., enrollment and completion rates) may help program developers increase theimpact of child abuse prevention services by reducing attrition. The present study examined the relative influence of provider,program, and individual factors from the Integrated Theory of Parent Involvement (ITPI) as well as maternal and family demo-graphic and risk variables in predicting service enrollment and completion in a home-based child maltreatment prevention service(SafeCareþ) and a standard community care program (Services as Usual [SAU]). Participants were 398 female caregivers ofchildren ages 5 and below. Support was found for the primary role of program and provider factors in client enrollment andcompletion of services. Specifically, participants in SafeCareþ were 4 times more likely to enroll in services and 8.5 times morelikely to complete services than those in SAU. Family risk variables including intimate partner psychological aggression, substanceabuse, and depression were also significant predictors. Recommended next steps include integration of risk-related factors in theITPI framework and disentangling specific provider and program factors related to service engagement.

  11. Barriers to health and social services for street-based sex workers.

    PubMed

    Kurtz, Steven P; Surratt, Hilary L; Kiley, Marion C; Inciardi, James A

    2005-05-01

    Homelessness, poverty, drug abuse and violent victimization faced by street-based women sex workers create needs for a variety of health and social services, yet simultaneously serve as barriers to accessing these very services. The present study utilized interview (n = 586) and focus group (n = 25) data to examine the service needs and associated barriers to access among women sex workers in Miami, Florida. Women most often reported acute service needs for shelter, fresh water, transportation, crisis intervention, and drug detoxification, as well as long-term needs for mental and physical health care, drug treatment, and legal and employment services. Barriers included both structural (e.g., program target population, travel costs, office hours, and social stigma) and individual (e.g., drug use, mental stability, and fear) factors. Bridging these gaps is tremendously important from a public health perspective given the disease burden among this population. Recommendations include service staff training, outreach, and promising research directions.

  12. Research on sudden environmental pollution public service platform construction based on WebGIS

    NASA Astrophysics Data System (ADS)

    Bi, T. P.; Gao, D. Y.; Zhong, X. Y.

    2016-08-01

    In order to actualize the social sharing and service of the emergency-response information for sudden pollution accidents, the public can share the risk source information service, dangerous goods control technology service and so on, The SQL Server and ArcSDE software are used to establish a spatial database to restore all kinds of information including risk sources, hazardous chemicals and handling methods in case of accidents. Combined with Chinese atmospheric environmental assessment standards, the SCREEN3 atmospheric dispersion model and one-dimensional liquid diffusion model are established to realize the query of related information and the display of the diffusion effect under B/S structure. Based on the WebGIS technology, C#.Net language is used to develop the sudden environmental pollution public service platform. As a result, the public service platform can make risk assessments and provide the best emergency processing services.

  13. The right location? Experiences of refugee adolescents seen by school-based mental health services.

    PubMed

    Fazel, Mina; Garcia, Jo; Stein, Alan

    2016-07-01

    Access to needed mental health services can be particularly difficult for newly arrived refugee and asylum-seeking adolescents, although many attend school. This study examined young refugees' impressions and experience of mental health services integrated within the school system. Semi-structured interviews were conducted with 40 adolescent refugees discharged by three school-based mental health services across the United Kingdom. Two-thirds preferred to be seen at school. Rumination and worry about insecurity in the asylum process had a negative impact particularly on the adolescents' social functioning and ability to focus at school. The important role played by teachers in supporting and mediating contact with mental health services was valued by those interviewed. The study confirms that schools offer an important location for mental health services for adolescent refugees and provide an important portal for integration of services.

  14. Community-Based Juvenile Reentry Services: The Effects of Service Dosage on Juvenile and Adult Recidivism

    ERIC Educational Resources Information Center

    Abrams, Laura S.; Terry, Diane; Franke, Todd M.

    2011-01-01

    In this study the authors examined the influence of length of participation in a community-based reentry program on the odds of reconviction in the juvenile and adult criminal justice systems. A structured telephone survey of reentry program alumni was conducted with 75 transition-age (18-25 year-old) young men. Binary logistic regression analysis…

  15. Interdependence and dynamics of essential services in an extensive risk context: a case study in Montserrat, West Indies

    NASA Astrophysics Data System (ADS)

    Sword-Daniels, V. L.; Rossetto, T.; Wilson, T. M.; Sargeant, S.

    2015-05-01

    The essential services that support urban living are complex and interdependent, and their disruption in disasters directly affects society. Yet there are few empirical studies to inform our understanding of the vulnerabilities and resilience of complex infrastructure systems in disasters. This research takes a systems thinking approach to explore the dynamic behaviour of a network of essential services, in the presence and absence of volcanic ashfall hazards in Montserrat, West Indies. Adopting a case study methodology and qualitative methods to gather empirical data, we centre the study on the healthcare system and its interconnected network of essential services. We identify different types of relationship between sectors and develop a new interdependence classification system for analysis. Relationships are further categorised by hazard conditions, for use in extensive risk contexts. During heightened volcanic activity, relationships between systems transform in both number and type: connections increase across the network by 41%, and adapt to increase cooperation and information sharing. Interconnections add capacities to the network, increasing the resilience of prioritised sectors. This in-depth and context-specific approach provides a new methodology for studying the dynamics of infrastructure interdependence in an extensive risk context, and can be adapted for use in other hazard contexts.

  16. Interdependence and dynamics of essential services in an extensive risk context: a case study in Montserrat, West Indies

    NASA Astrophysics Data System (ADS)

    Sword-Daniels, V. L.; Rossetto, T.; Wilson, T. M.; Sargeant, S.

    2015-02-01

    The essential services that support urban living are complex and interdependent, and their disruption in disasters directly affects society. Yet there are few empirical studies to inform our understanding of the vulnerabilities and resilience of complex infrastructure systems in disasters. This research takes a systems thinking approach to explore the dynamic behaviour of a network of essential services, in the presence and absence of volcanic ashfall hazards in Montserrat, West Indies. Adopting a case study methodology and qualitative methods to gather empirical data we centre the study on the healthcare system and its interconnected network of essential services. We identify different types of relationship between sectors and develop a new interdependence classification system for analysis. Relationships are further categorised by hazard condition, for use in extensive risk contexts. During heightened volcanic activity, relationships between systems transform in both number and type: connections increase across the network by 41%, and adapt to increase cooperation and information sharing. Interconnections add capacities to the network, increasing the resilience of prioritised sectors. This in-depth and context-specific approach provides a new methodology for studying the dynamics of infrastructure interdependence in an extensive risk context, and can be adapted for use in other hazard contexts.

  17. Process-based Principles for Restoring Dynamic River Ecosystems

    NASA Astrophysics Data System (ADS)

    Pess, G. R.; Beechie, T. J.; Pollock, M. M.

    2006-12-01

    Process-based restoration focuses on re-establishing natural rates and magnitudes of geomorphological, hydrological, and biological processes that sustain biodiversity and biological productivity in dynamic river ecosystems. It contrasts with traditional restoration practices, which focus on creating specific habitat characteristics that meet perceived "good" or "minimum" habitat conditions or standards. Process-based restoration relies on the understanding that habitat-forming processes are dynamic and comprise a shifting mosaic of diverse habitats. Local animal populations or communities are adapted to this dynamic habitat mosaic. Fundamental principles underlying process-based restoration are: (1) restoration must address biophysical processes that drive ecosystem change, and (2) the scale of restoration must be relevant to the appropriate landscape and biological process scales. Restoration efforts that re-establish natural rates and magnitudes of system processes promote ecosystem recovery, and help avoid common pitfalls of traditional restoration practices such as creating habitats that are outside the range of a site's natural potential, fixing habitats in space and time, and building habitats that are ultimately overwhelmed by untreated or uncontrollable system drivers. Restoring such processes also allows dynamic riverine ecosystems to express their natural potential, which generates the natural range of habitat conditions to which biological communities are adapted. Non-point processes such as erosion often require restoration at the scale of watersheds to effectively restore river ecosystems, whereas reach-level processes such as the maintenance of connected floodplain habitats can be effective at smaller spatial scales. Flow restoration in regulated rivers should consider the full range of environmentally important flows (e.g., low flow to floods). Biological processes such as the life-history scales of migratory animals (e.g., anadromous salmon) may be

  18. ANFIS -Based Navigation for HVAC Service Robot with Image Processing

    NASA Astrophysics Data System (ADS)

    Salleh, Mohd Zoolfadli Md; Rashid, Nahrul Khair Alang Md; Mohd Mustafah, Yasir

    2013-12-01

    In this paper, we present an ongoing work on the autonomous navigation of a mobile service robot for Heat, Ventilation and Air Condition (HVAC) ducting. CCD camera mounted on the front-end of our robot is used to analyze the ducts openings (blob analysis) in order to differentiate them from other landmarks (blower fan, air outlets and etc). Distance between the robot and duct openings is measured using ultrasonic sensor. Controller chosen is ANFIS where its architecture accepts three inputs; recognition of duct openings, robot positions and distance while the outputs is maneuver direction (left or right).45 membership functions are created from which produces 46 training epochs. In order to demonstrate the functionality of the system, a working prototype is developed and tested inside HVAC ducting in ROBOCON Lab, IIUM.

  19. New works in space. [Space Shuttle based manufacturing and services

    NASA Technical Reports Server (NTRS)

    Kingsbury, J. E.

    1978-01-01

    Goods and services that may be furnished by the Space Shuttle are described. A single multibeam antenna array capable of supplying satellite communication for 256 U.S. cities, a disaster warning network, and a TV link to remote areas is discussed. Attention is also given to such materials processing programs as crystal growth (for example, production of mercuric iodide crystals for gamma-ray detectors), eutectic growth of solid-solution crystals such as mercury-cadmium-telluride, manufacture of uniform latex spheres for medical applications, and development of small glass spheres for fusion power applications. In addition to the Space Telescope, a meter-class telescope on the Shuttle and a wide-field survey instrument are under study.

  20. Service and business model for technology enabled and home-based cardiac rehabilitation programs.

    PubMed

    Sarela, Antti; Whittaker, Frank; Korhonen, Ilkka

    2009-01-01

    Cardiac rehabilitation programs are comprehensive life-style programs aimed at preventing recurrence of a cardiac event. However, the current programs have globally significantly low levels of uptake. Home-based model can be a viable alternative to hospital-based programs. We developed and analysed a service and business model for home based cardiac rehabilitation based on personal mentoring using mobile phones and web services. We analysed the different organizational and economical aspects of setting up and running the home based program and propose a potential business model for a sustainable and viable service. The model can be extended to management of other chronic conditions to enable transition from hospital and care centre based treatments to sustainable home-based care.

  1. Implementing School-Based Services: Strategies from New Mexico's School-Based Health and Extended Learning Services. Research-to-Results Practitioners Insights. Publication #2009-01

    ERIC Educational Resources Information Center

    Collins, Ashleigh; Moore, Kristin Anderson; Paisano-Trujillo, Renee

    2009-01-01

    Practitioners and policy makers from throughout New Mexico convened in Albuquerque in May 2008 for three Roundtable discussions on implementing school-based health services and extended learning opportunities in the state. Several of the Roundtable participants were involved in the New Mexico Community Foundation's Elev8 New Mexico initiative.…

  2. Visualization of cardiac dynamics using physics-based deformable model

    NASA Astrophysics Data System (ADS)

    Lin, Wei-te; Robb, Richard A.

    2000-04-01

    Modeling of moving anatomic structures is complicated by the complexity of motion intrinsic and extrinsic to the structures. However when motion is cyclical, such as in heart, effective dynamic modeling can be approached using modern fast imaging techniques, which provide 3D structural data. Data may be acquired as a sequence of 3D volume images throughout the cardiac cycle. To model the intricate non- linear motion of the heart, we created a physics-based surface model which can realistically deform between successive time points in the cardiac cycle, yielding a dynamic 4D model of cardiac motion. Sequences of fifteen 3D volume images of intact canine beating hearts were acquired during compete cardiac cycles using the Dynamic Spatial Reconstructor and the Electron Beam CT. The chambers of the heart were segmented at successive time points, typically at 1/15-second intervals. The left ventricle of the first item point was reconstructed as an initial triangular mesh. A mass-spring physics-based deformable model, which can expand and shrink with local contraction and stretching forces distributed in an anatomically accurate simulation of cardiac motion, was applied to the initial mesh and allowed the initial mesh to deform to fit the left ventricle in successive time increments of the sequence. The resultant 4D model can be interactively transformed and displayed with associated regional electrical activity mapped onto the anatomic surfaces, producing a 5D mode, which faithfully exhibits regional cardiac contraction and relaxation patterns over the entire heart. For acquisition systems that may provide only limited 4D data, the model can provide interpolated anatomic shape between time points. This physics-based deformable model accurately represents dynamic cardiac structural changes throughout the cardiac cycle. Such models provides the framework for minimizing the number of time points required to usefully depict regional motion of myocardium and allowing

  3. A study on heterogeneous distributed spatial information platform based on semantic Web services

    NASA Astrophysics Data System (ADS)

    Peng, Shuang-yun; Yang, Kun; Xu, Quan-li; Huang, Bang-mei

    2008-10-01

    With the development of Semantic Web technology, the spatial information service based on ontology is an effective way for sharing and interoperation of heterogeneous information resources in the distributed network environment. This paper discusses spatial information sharing and interoperability in the Semantic Web Services architecture. Through using Ontology record spatial information in sharing knowledge system, explicit and formalization expresses the default and the concealment semantic information. It provides the prerequisite for spatial information sharing and interoperability; Through Semantic Web Services technology parses Ontology and intelligent buildings services under network environment, form a network of services. In order to realize the practical applications of spatial information sharing and interoperation in different brunches of CDC system, a prototype system for HIV/AIDS information sharing based on geo-ontology has also been developed by using the methods described above.

  4. [Urban ecosystem services: A review].

    PubMed

    Mao, Qi-zheng; Huang, Gan-lin; Wu, Jian-guo

    2015-04-01

    Maintaining and improving ecosystem services in urban areas and human well-being are essential for sustainable development and therefore constitute an important topic in urban ecology. Here we reviewed studies on ecosystem services in urban areas. Based on the concept and classification of urban ecosystem services, we summarized characteristics of urban ecosystem services, including the human domination, high demand of ecosystem services in urban areas, spatial heterogeneity and temporal dynamics of ecosystem services supply and demand in urban areas, multi-services of urban green infrastructures, the socio-economic dimension of ecosystem services supply and ecosystem disservices in urban areas. Among different urban ecosystem services, the regulating service and cultural service are particularly indispensable to benefit human health. We pointed out that tradeoffs among different types of ecosystem services mostly occur between supportive service and cultural service, as well as regulating service and cultural service. In particular, we emphasized the relationship between landscape design (i.e. green infrastructure) and ecosystem services supply. Finally, we discussed current gaps to link urban ecosystem services studies to landscape design and management and pointed out several directions for future research in urban ecosystem services.

  5. MME-based attitude dynamics identification and estimation for SAMPEX

    NASA Technical Reports Server (NTRS)

    Depena, Juan; Crassidis, John L.; Mcpartland, Michael D.; Meyer, Thomas J.; Mook, D. Joseph

    1994-01-01

    A method is described for obtaining optimal attitude estimation algorithms for spacecraft lacking attitude rate measurement devices (rate gyros), and then demonstrated using actual flight data from the Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) spacecraft. SAMPEX does not have on-board rate sensing, and relies on sun sensors and a three-axis magnetometer for attitude determination. Problems arise since typical attitude estimation is accomplished by filtering measurements of both attitude and attitude rates. Rates are nearly always sampled much more densely than are attitudes. Thus, the absence/loss of rate data normally reduces both the total amount of data available and the sampling density (in time) by a substantial fraction. As a result, the sensitivity of the estimates to model uncertainty and to measurement noise increases. In order to maintain accuracy in the attitude estimates, there is increased need for accurate models of the rotational dynamics. The proposed approach is based on the minimum model error (MME) optimal estimation strategy, which has been successfully applied to estimation of poorly modeled dynamic systems which are relatively sparsely and/or noisily measured. The MME estimates may be used to construct accurate models of the system dynamics (i.e. perform system model identification). Thus, an MME-based approach directly addresses the problems created by absence of attitude rate measurements.

  6. On trajectory-based nonadiabatic dynamics: Bohmian dynamics versus trajectory surface hopping

    NASA Astrophysics Data System (ADS)

    Curchod, Basile F. E.; Tavernelli, Ivano

    2013-05-01

    In this work, we present a complete derivation of the NonAdiabatic Bohmian DYnamics (NABDY) equations of motion. This approach naturally emerges from a transformation of the molecular time-dependent Schrödinger equation in the adiabatic representation of the electronic states. The numerical implementation of the method is discussed while simple nonadiabatic models are employed to address the accuracy of NABDY and to reveal its ability to capture nuclear quantum effects that are missed in trajectory surface hopping (TSH) due to the independent trajectory approximation. A careful comparison of the correlated, NABDY, and the uncorrelated, TSH, propagation is also given together with a description of the main approximations and assumptions underlying the "derivation" of a nonadiabatic molecular dynamics scheme based on classical trajectories.

  7. On trajectory-based nonadiabatic dynamics: Bohmian dynamics versus trajectory surface hopping.

    PubMed

    Curchod, Basile F E; Tavernelli, Ivano

    2013-05-14

    In this work, we present a complete derivation of the NonAdiabatic Bohmian DYnamics (NABDY) equations of motion. This approach naturally emerges from a transformation of the molecular time-dependent Schrödinger equation in the adiabatic representation of the electronic states. The numerical implementation of the method is discussed while simple nonadiabatic models are employed to address the accuracy of NABDY and to reveal its ability to capture nuclear quantum effects that are missed in trajectory surface hopping (TSH) due to the independent trajectory approximation. A careful comparison of the correlated, NABDY, and the uncorrelated, TSH, propagation is also given together with a description of the main approximations and assumptions underlying the "derivation" of a nonadiabatic molecular dynamics scheme based on classical trajectories.

  8. A robotics-based testbed for verifying a method of identifying contact-dynamics model parameters

    NASA Astrophysics Data System (ADS)

    Ma, Ou; Boyden, Samuel

    2006-05-01

    This paper describes a general method of identifying the key parameters of multiple-point contact-dynamics models and a robotics-based testbed for experimentally verifying the new method. Some of the current and future flight systems are required to make physical contact on orbit for on-orbit servicing such as docking, refueling, repairing, etc. Because of the high risks associated with contact operations, the design and operation of such a flight system must be thoroughly analyzed and verified in advance by hardware testing and/or high-fidelity computer simulation. Computer simulations are increasingly playing a major role in system verification because it is extreme difficult to test 6-DOF microgravity contact dynamics on the ground. However, the accuracy of computer simulation depends not only on the mathematical model (i.e., formulation, algorithms, and computer code) but also on the values of model parameters. It is, therefore, desirable to have a systematic method which can identify multiple model parameters directly from routine physical tests of the contact components. The robotics-based experiment testbed introduced in this paper is specially designed to test and verify such a method of identifying contact parameters. The method is capable of identifying the key stiffness, damping, and friction parameters of a contact dynamics model all together from hardware test of contacting components having complicated geometries and multiple contacts. It can also be used to extract contact-dynamics model parameters of a dynamic system from its routine test of complex contact hardware. The paper discusses the major design requirements of this experimental testbed and how they are met by the specific design of the system.

  9. HIV seropositivity rates in outreach-based counseling and testing services: program evaluation.

    PubMed

    DiFranceisco, W; Holtgrave, D R; Hoxie, N; Reiser, W J; Resenhoeft, R; Pinkerton, S D; Vergeront, J

    1998-11-01

    A common assumption is that outreach-based HIV counseling and testing services reach a clientele with a higher HIV seroprevalence than clinic-based counseling and testing. To examine this assumption, we analyzed Wisconsin's anonymous counseling and testing client records for 62,299 contacts (testing episodes) from 1992 to 1995. Bivariate analysis of counseling and testing service setting (outreach-based or clinic-based) and HIV test results suggested that outreach contacts were 23% (odds ratio [OR], 1.23; 95% confidence interval [95% CI], 1.0-1.5) more likely to test HIV-seropositive than clinic-based contacts. Relations between HIV test outcome and variables for client age, race, gender, previous testing history, mode of risk exposure, and region, as well as service setting, were examined by logistic regression. An inverted relation between service setting and seropositivity (OR, 0.65; 95% CI, 0.5-0.8) indicated that, within some subpopulations, outreach contacts were significantly less likely to test HIV-positive than clinic-based contacts. Analysis of interactions among the covariates identified race as a critical codeterminant in the relation between service setting and test outcome. These results support retargeting outreach services to enhance their overall effectiveness. Specific recommendations include the need for aggressive strategies to better "market" HIV counseling and testing to nonwhite populations, and to focus resources more selectively on gay/bisexual men of all races.

  10. Dynamic Network-Based Epistasis Analysis: Boolean Examples

    PubMed Central

    Azpeitia, Eugenio; Benítez, Mariana; Padilla-Longoria, Pablo; Espinosa-Soto, Carlos; Alvarez-Buylla, Elena R.

    2011-01-01

    In this article we focus on how the hierarchical and single-path assumptions of epistasis analysis can bias the inference of gene regulatory networks. Here we emphasize the critical importance of dynamic analyses, and specifically illustrate the use of Boolean network models. Epistasis in a broad sense refers to gene interactions, however, as originally proposed by Bateson, epistasis is defined as the blocking of a particular allelic effect due to the effect of another allele at a different locus (herein, classical epistasis). Classical epistasis analysis has proven powerful and useful, allowing researchers to infer and assign directionality to gene interactions. As larger data sets are becoming available, the analysis of classical epistasis is being complemented with computer science tools and system biology approaches. We show that when the hierarchical and single-path assumptions are not met in classical epistasis analysis, the access to relevant information and the correct inference of gene interaction topologies is hindered, and it becomes necessary to consider the temporal dynamics of gene interactions. The use of dynamical networks can overcome these limitations. We particularly focus on the use of Boolean networks that, like classical epistasis analysis, relies on logical formalisms, and hence can complement classical epistasis analysis and relax its assumptions. We develop a couple of theoretical examples and analyze them from a dynamic Boolean network model perspective. Boolean networks could help to guide additional experiments and discern among alternative regulatory schemes that would be impossible or difficult to infer without the elimination of these assumption from the classical epistasis analysis. We also use examples from the literature to show how a Boolean network-based approach has resolved ambiguities and guided epistasis analysis. Our article complements previous accounts, not only by focusing on the implications of the hierarchical and

  11. Tensor-based dynamic reconstruction method for electrical capacitance tomography

    NASA Astrophysics Data System (ADS)

    Lei, J.; Mu, H. P.; Liu, Q. B.; Li, Z. H.; Liu, S.; Wang, X. Y.

    2017-03-01

    Electrical capacitance tomography (ECT) is an attractive visualization measurement method, in which the acquisition of high-quality images is beneficial for the understanding of the underlying physical or chemical mechanisms of the dynamic behaviors of the measurement objects. In real-world measurement environments, imaging objects are often in a dynamic process, and the exploitation of the spatial-temporal correlations related to the dynamic nature will contribute to improving the imaging quality. Different from existing imaging methods that are often used in ECT measurements, in this paper a dynamic image sequence is stacked into a third-order tensor that consists of a low rank tensor and a sparse tensor within the framework of the multiple measurement vectors model and the multi-way data analysis method. The low rank tensor models the similar spatial distribution information among frames, which is slowly changing over time, and the sparse tensor captures the perturbations or differences introduced in each frame, which is rapidly changing over time. With the assistance of the Tikhonov regularization theory and the tensor-based multi-way data analysis method, a new cost function, with the considerations of the multi-frames measurement data, the dynamic evolution information of a time-varying imaging object and the characteristics of the low rank tensor and the sparse tensor, is proposed to convert the imaging task in the ECT measurement into a reconstruction problem of a third-order image tensor. An effective algorithm is developed to search for the optimal solution of the proposed cost function, and the images are reconstructed via a batching pattern. The feasibility and effectiveness of the developed reconstruction method are numerically validated.

  12. A Dynamic Attitude Measurement System Based on LINS

    PubMed Central

    Li, Hanzhou; Pan, Quan; Wang, Xiaoxu; Zhang, Juanni; Li, Jiang; Jiang, Xiangjun

    2014-01-01

    A dynamic attitude measurement system (DAMS) is developed based on a laser inertial navigation system (LINS). Three factors of the dynamic attitude measurement error using LINS are analyzed: dynamic error, time synchronization and phase lag. An optimal coning errors compensation algorithm is used to reduce coning errors, and two-axis wobbling verification experiments are presented in the paper. The tests indicate that the attitude accuracy is improved 2-fold by the algorithm. In order to decrease coning errors further, the attitude updating frequency is improved from 200 Hz to 2000 Hz. At the same time, a novel finite impulse response (FIR) filter with three notches is designed to filter the dither frequency of the ring laser gyro (RLG). The comparison tests suggest that the new filter is five times more effective than the old one. The paper indicates that phase-frequency characteristics of FIR filter and first-order holder of navigation computer constitute the main sources of phase lag in LINS. A formula to calculate the LINS attitude phase lag is introduced in the paper. The expressions of dynamic attitude errors induced by phase lag are derived. The paper proposes a novel synchronization mechanism that is able to simultaneously solve the problems of dynamic test synchronization and phase compensation. A single-axis turntable and a laser interferometer are applied to verify the synchronization mechanism. The experiments results show that the theoretically calculated values of phase lag and attitude error induced by phase lag can both match perfectly with testing data. The block diagram of DAMS and physical photos are presented in the paper. The final experiments demonstrate that the real-time attitude measurement accuracy of DAMS can reach up to 20″ (1σ) and the synchronization error is less than 0.2 ms on the condition of three axes wobbling for 10 min. PMID:25177802

  13. In-service teachers' perceptions of project-based learning.

    PubMed

    Habók, Anita; Nagy, Judit

    2016-01-01

    The study analyses teachers' perceptions of methods, teacher roles, success and evaluation in PBL and traditional classroom instruction. The analysis is based on empirical data collected in primary schools and vocational secondary schools. An analysis of 109 questionnaires revealed numerous differences based on degree of experience and type of school. In general, project-based methods were preferred among teachers, who mostly perceived themselves as facilitators and considered motivation and transmission of values central to their work. Teachers appeared not to capitalize on the use of ICT tools or emotions. Students actively participated in the evaluation process via oral evaluation.

  14. Voronoi Diagram Based Optimization of Dynamic Reactive Power Sources

    SciTech Connect

    Huang, Weihong; Sun, Kai; Qi, Junjian; Xu, Yan

    2015-01-01

    Dynamic var sources can effectively mitigate fault-induced delayed voltage recovery (FIDVR) issues or even voltage collapse. This paper proposes a new approach to optimization of the sizes of dynamic var sources at candidate locations by a Voronoi diagram based algorithm. It first disperses sample points of potential solutions in a searching space, evaluates a cost function at each point by barycentric interpolation for the subspaces around the point, and then constructs a Voronoi diagram about cost function values over the entire space. Accordingly, the final optimal solution can be obtained. Case studies on the WSCC 9-bus system and NPCC 140-bus system have validated that the new approach can quickly identify the boundary of feasible solutions in searching space and converge to the global optimal solution.

  15. Cost-efficiency in Medicaid long-term support services: the role of home and community based services.

    PubMed

    Chattopadhyay, Arpita; Fan, Yang; Chattopadhyay, Sudip

    2013-12-01

    Growth in home and community based services (HCBS) has been implicated in rising long-term care expenditure in the Medicaid program. Its efficiency impact has not been tested. Using Stochastic Frontier Analysis (SFA) and panel data methods, we evaluated the cost efficiency of long-term support services (LTSS) provided by state Medicaid agencies and examined its association with intensity of HCBS use. We compared the efficiency of state funded HCBS programs with federal waiver programs. We found substantial variation in cost efficiency of LTSS programs by states, but all showed improvement over time related to increased HCBS use. Higher participation in federal waivers programs yielded additional improvements in cost-efficiency. Results indicate that increasing HCBS services targeted at "high need" population and developmentally disabled individuals would improve efficiency in LTSS delivery. These results reveal the importance of measuring and comparing efficiencies across Medicaid funded LTSS programs, as we introduce reforms in the LTSS delivery system. We recommend that Medicaid agencies invest in the development of improved data sources for the estimation of cost efficiencies of their programs.

  16. Dynamic positioning system based on active disturbance rejection technology

    NASA Astrophysics Data System (ADS)

    Lei, Zhengling; Guo, Chen; Fan, Yunsheng

    2015-08-01

    A dynamically positioned vessel, by the International Maritime Organization (IMO) and the certifying class societies (DNV, ABS, LR, etc.), is defined as a vessel that maintains its position and heading (fixed location or pre-determined track) exclusively by means of active thrusters. The development of control technology promotes the upgrading of dynamic positioning (DP) systems. Today there are two different DP systems solutions available on the market: DP system based on PID regulator and that based on model-based control. Both systems have limited disturbance rejection capability due to their design principle. In this paper, a new DP system solution is proposed based on Active Disturbance Rejection Control (ADRC) technology. This technology is composed of Tracking-Differentiator (TD), Extended State Observer (ESO) and Nonlinear Feedback Combination. On one hand, both TD and ESO can act as filters and can be used in place of conventional filters; on the other hand, the total disturbance of the system can be estimated and compensated by ESO, which therefore enhances the system's disturbance rejection capability. This technology's advantages over other methods lie in two aspects: 1) This method itself can not only achieve control objectives but also filter noisy measurements without other specialized filters; 2) This method offers a new useful approach to suppress the ocean disturbance. The simulation results demonstrate the effectiveness of the proposed method.

  17. Knowledge and Use of Intervention Practices by Community-Based Early Intervention Service Providers

    ERIC Educational Resources Information Center

    Paynter, Jessica M.; Keen, Deb

    2015-01-01

    This study investigated staff attitudes, knowledge and use of evidence-based practices (EBP) and links to organisational culture in a community-based autism early intervention service. An EBP questionnaire was completed by 99 metropolitan and regionally-based professional and paraprofessional staff. Participants reported greater knowledge and use…

  18. Monte Carlo-based simulation of dynamic jaws tomotherapy

    SciTech Connect

    Sterpin, E.; Chen, Y.; Chen, Q.; Lu, W.; Mackie, T. R.; Vynckier, S.

    2011-09-15

    Purpose: Original TomoTherapy systems may involve a trade-off between conformity and treatment speed, the user being limited to three slice widths (1.0, 2.5, and 5.0 cm). This could be overcome by allowing the jaws to define arbitrary fields, including very small slice widths (<1 cm), which are challenging for a beam model. The aim of this work was to incorporate the dynamic jaws feature into a Monte Carlo (MC) model called TomoPen, based on the MC code PENELOPE, previously validated for the original TomoTherapy system. Methods: To keep the general structure of TomoPen and its efficiency, the simulation strategy introduces several techniques: (1) weight modifiers to account for any jaw settings using only the 5 cm phase-space file; (2) a simplified MC based model called FastStatic to compute the modifiers faster than pure MC; (3) actual simulation of dynamic jaws. Weight modifiers computed with both FastStatic and pure MC were compared. Dynamic jaws simulations were compared with the convolution/superposition (C/S) of TomoTherapy in the ''cheese'' phantom for a plan with two targets longitudinally separated by a gap of 3 cm. Optimization was performed in two modes: asymmetric jaws-constant couch speed (''running start stop,'' RSS) and symmetric jaws-variable couch speed (''symmetric running start stop,'' SRSS). Measurements with EDR2 films were also performed for RSS for the formal validation of TomoPen with dynamic jaws. Results: Weight modifiers computed with FastStatic were equivalent to pure MC within statistical uncertainties (0.5% for three standard deviations). Excellent agreement was achieved between TomoPen and C/S for both asymmetric jaw opening/constant couch speed and symmetric jaw opening/variable couch speed, with deviations well within 2%/2 mm. For RSS procedure, agreement between C/S and measurements was within 2%/2 mm for 95% of the points and 3%/3 mm for 98% of the points, where dose is greater than 30% of the prescription dose (gamma analysis

  19. Physics of base-pairing dynamics in DNA

    NASA Astrophysics Data System (ADS)

    Manghi, Manoel; Destainville, Nicolas

    2016-05-01

    As a key molecule of life, Deoxyribo-Nucleic Acid (DNA) is the focus of numbers of investigations with the help of biological, chemical and physical techniques. From a physical point of view, both experimental and theoretical works have brought quantitative insights into DNA base-pairing dynamics that we review in this Report, putting emphasis on theoretical developments. We discuss the dynamics at the base-pair scale and its pivotal coupling with the polymer one, with a polymerization index running from a few nucleotides to tens of kilo-bases. This includes opening and closure of short hairpins and oligomers as well as zipping and unwinding of long macromolecules. We review how different physical mechanisms are either used by Nature or utilized in biotechnological processes to separate the two intertwined DNA strands, by insisting on quantitative results. They go from thermally-assisted denaturation bubble nucleation to force- or torque-driven mechanisms. We show that the helical character of the molecule, possibly supercoiled, can play a key role in many denaturation and renaturation processes. We categorize the mechanisms according to the relative timescales associated with base-pairing and chain orientational degrees of freedom such as bending and torsional elastic ones. In some specific situations, these chain orientational degrees of freedom can be integrated out, and the quasi-static approximation is valid. The complex dynamics then reduces to the diffusion in a low-dimensional free-energy landscape. In contrast, some important cases of experimental interest necessarily appeal to far-from-equilibrium statistical mechanics and hydrodynamics.

  20. Accelerating and democratizing science through cloud-based services.

    SciTech Connect

    Foster, I.

    2011-05-01

    Many businesses today save time and money, and increase their agility, by outsourcing mundane IT tasks to cloud providers. The author argues that similar methods can be used to overcome the complexities inherent in increasingly data-intensive, computational, and collaborative scientific research. He describes Globus Online, a system that he and his colleagues are developing to realize this vision. he scientific community today has unprecedented opportunities to effect transformational change in how individuals and teams engage in discovery. The driving force is a set of interrelated new capabilities that, when harnessed, can enable dramatic acceleration in the discovery process: greater availability of massive data, exponentially faster computers, ultra-high-speed networks, and deep interdisciplinary collaboration. The opportunity - and challenge - is to make these capabilities accessible not just to a few 'big science' projects but to every researcher at every level. Here, I argue that the key to seizing this opportunity is embracing software delivery methods that haven't been widely adopted in research, notably software as a service (SaaS) - a technology that forms an important part of what people refer to as the cloud. I also describe projects in the Computation Institute at the University of Chicago and Argonne National Laboratory that aim to realize this vision, focusing initially on data movement and management.