796 research outputs found
Experiments and analysis of quality andEnergy-aware data aggregation approaches inWSNs
A wireless sensor network consists of autonomous devices
able to collect various data from the area that surrounds
them. However, the resources associated with sensors are
limited and, thus, in order to guarantee a longer life of all
the network components, it is necessary to adopt energysavings
methods. This paper, considering that the transmission
phase is the main cause of energy dissipation, presents
an approach aimed to save energy by capturing and aggregating
signals instead of sending them in raw form. Anyway,
aggregation should not imply the loss of useful data. For this
reason, information about possible outliers is preserved and
the aggregated values have to satisfy data quality (i.e., accuracy,
precision, and timeliness) requirements. In order to
show the correctness and validity of the proposed method,
it has been tested on a real case study and its performance
has been compared with two other consolidated approaches
Quality of Web Mashups: A Systematic Mapping Study
The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-04244-2_8Web mashups are a new generation of applications based on the
composition of ready-to-use, heterogeneous components. They are gaining
momentum thanks to their lightweight composition approach, which represents
a new opportunity for companies to leverage on past investments in SOA, Web
services, and public APIs. Although several studies are emerging in order to
address mashup development, no systematic mapping studies have been
reported on how quality issues are being addressed. This paper reports a
systematic mapping study on which and how the quality of Web mashups has
been addressed and how the product quality-aware approaches have been
defined and validated. The aim of this study is to provide a background in
which to appropriately develop future research activities. A total of 38 research
papers have been included from an initial set of 187 papers. Our results
provided some findings regarding how the most relevant product quality
characteristics have been addressed in different artifacts and stages of the
development process. They have also been useful to detect some research gaps,
such as the need of more controlled experiments and more quality-aware
mashup development proposals for other characteristics which being important
for the Web domain have been neglected such as Usability and ReliabilityThis work is funded by the MULTIPLE project (TIN2009-13838), the Senescyt program (scholarships 2011), and the Erasmus Mundus Programme of the European Commission under the Transatlantic Partnership for Excellence in Engineering - TEE Project.Cedillo Orellana, IP.; Fernández MartÃnez, A.; Insfrán Pelozo, CE.; Abrahao Gonzales, SM. (2013). Quality of Web Mashups: A Systematic Mapping Study. En Current Trends in Web Engineering. Springer. 66-78. https://doi.org/10.1007/978-3-319-04244-2_8S6678Alkhalifa, E.: The Future of Enterprise Mashups. Business Insights. E-Strategies for Resource Management Systems (2009)Beemer, B., Gregg, D.: Mashups: A Literature Review and Classification Framework. Future Internet 1, 59–87 (2009)Cappiello, C., Daniel, F., Matera, M.: A Quality Model for Mashup Components. In: Gaedke, M., Grossniklaus, M., DÃaz, O. (eds.) ICWE 2009. LNCS, vol. 5648, pp. 236–250. Springer, Heidelberg (2009)Cappiello, C., Daniel, F., Matera, M., Pautasso, C.: Information Quality in Mashups. IEEE Internet Computing 14(4), 32–40 (2010)Cappiello, C., Matera, M., Picozzi, M., Daniel, F., Fernandez, A.: Quality-Aware Mashup Composition: Issues, Techniques and Tools. In: 8th International Conference on the Quality of Information and Communications Technology (QUATIC 2012), pp. 10–19 (2012)Fenton, N.E., Pfleeger, S.L.: Software Metrics: A Rigorous and Practical Approach, 2nd edn. International Thompson 1996, pp. I–XII, 1–638 (1996) ISBN 978-1-85032-275-7Fernandez, A., Insfran, E., Abrahão, S.: Usability evaluation methods for the web: A systematic mapping study. Information and Software Technology 53(8), 789–817 (2011)Garousi, V., Mesbah, A., Betin-Can, A., Mirshokraie, S.: A systematic mapping study of web application testing. Information and Software Technology 55(8), 1374–1396 (2013)Grammel, L., Storey, M.-A.: A survey of mashup development environments. In: Chignell, M., Cordy, J., Ng, J., Yesha, Y. (eds.) The Smart Internet. LNCS, vol. 6400, pp. 137–151. Springer, Heidelberg (2010)Hoyer, V., Fischer, M.: Market Overview of Enterprise Mashup Tools. In: Bouguettaya, A., Krueger, I., Margaria, T. (eds.) ICSOC 2008. LNCS, vol. 5364, pp. 708–721. Springer, Heidelberg (2008)ISO/IEC: ISO/IEC 25010 Systems and software engineering. Systems and software Quality Requirements and Evaluation (SQuaRE). System and software quality models (2011)Kitchenham, B., Charters, S.: Guidelines for performing Systematic Literature Reviews in Software Engineering. Version 2.3, ESBE Technical Report, Keele University, UK (2007)Mendes, E.: A systematic review on the Web engineering research. In: International Symposium on Empirical Software Engineering (ISESE 2005), pp. 498–507 (2005)OrangeLabs: State of the Art in Mashup tools, SocEDA project, pp. 1–59 (2011)Petersen, K., Feldt, R., Mujtaba, S., Mattsson, M.: Systematic mapping studies in software engineering. In: 12th International Conference on Evaluation and Assessment in Software Engineering (EASE), pp. 68–77 (2008)Raza, M., Hussain, F.K., Chang, E.: A methodology for quality-based mashup of data sources. In: 10th International Conference on Information Integration and Web-based Applications & Services (iiWAS 2008), pp. 528–533 (2008)Saeed, A.: A Quality-based Framework for Leveraging the Process of Mashup Component Selection (2009), https://gupea.ub.gu.se/handle/2077/21953Sharma, A., Hellmann, T.D., Maurer, F.: Testing of Web Services - A Systematic Mapping. In: 8th World Congress on Services (SERVICES 2012), pp. 346–352 (2012
On the Role of Context in the Design of Mobile Mashups
This paper presents a design methodology and an accompanying platform for the design and fast development of Context-Aware
Mobile mashUpS (CAMUS). The approach is characterized by the role given to context as a first-class modeling dimension used to support i) the identification of the most adequate resources that can satisfy the users' situational needs and ii) the consequent tailoring at runtime of the provided data and functions. Context-based abstractions are exploited to generate models specifying how data returned by the selected services have to be merged and visualized by means of integrated views. Thanks
to the adoption of Model-Driven Engineering (MDE) techniques, these models drive the flexible execution of the final mobile app on target mobile devices. A prototype of the platform, making use of novel and advanced Web and mobile technologies, is also illustrated
Live, Personal Data Integration Through UI-Oriented Computing
This paper proposes a new perspective on the problem of data integration on the Web: the one of the Surface Web. It introduces the concept of UI-oriented computing as a computing paradigm whose core ingredient are the user interfaces that build up the SurfaceWeb, and shows how a sensible mapping of data integration tasks to user interface elements and user interactions is able to cope with data integration scenarios that so far have only be conceived for the Deep Web with its APIs and Web services. The described approach provides a novel conceptual and technological framework for practices, such as the integration of data APIs/services and the extraction of content from Web pages, that are common practice but still not adequately supported. The approach targets both programmers and users alike and comes as an extensible, open-source browser extension
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4noopennoneCappiello J; Piazza C; Taglietti V; Nicolai P.Cappiello, Johnny; Piazza, Cesare; Taglietti, V; Nicolai, Pier
The Morphology of Exciting Dark Matter and the Galactic 511 keV Signal
We study the morphology of the 511 keV signal that could be produced by
exciting dark matter (XDM) in the Milky Way. In this model, collisions between
dark matter particles excite the dark matter to a state that can then decay
back to the ground state, releasing an electron-positron pair. These electrons
and positrons would then annihilate, producing 511 keV photons that could
explain the 511 keV signal seen by INTEGRAL at the Galactic Center. We compare
the resulting flux with the most recent INTEGRAL data, performing the first
full statistical analysis of the exciting dark matter model. We focus on
exciting dark matter in the mass and cross section ranges 100 GeV 3 TeV and cm s cm s. We show that exciting dark matter
can provide a significantly better fit than the simpler case of annihilating
dark matter, with for all but one of the density profiles
we consider.Comment: 6 pages, 3 figures. Updated to fix typos and match the published
versio
Quality-aware mashup composition: issues, techniques and tools
Web mashups are a new generation of applications
based on the composition of ready-to-use, heterogeneous
components. In different contexts, ranging from the consumer Web to Enterprise systems, the potential of this new technology is to make users evolve from passive receivers of applications to actors actively involved in the creation of their artifacts, thus accommodating the inherent variability of the users’ needs.
Current advances in mashup technologies are good candidates
to satisfy this requirement. However, some issues are still largely
unexplored. In particular, quality issues specific for this class
of applications, and the way they can guide the users in the
identification of adequate components and composition patterns, are neglected. This paper discusses quality dimensions that can capture the intrinsic quality of mashup components, as well as the components’ capacity to maximize the quality and the userperceived value of the overall composition. It also proposes an assisted composition process in which quality becomes the driver for recommending to the users how to complete mashups, based on the integration of quality assessment and recommendation techniques within a tool for mashup development
Dark Matter from Monogem
As a supernova shock expands into space, it may collide with dark matter
particles, scattering them up to velocities more than an order of magnitude
larger than typical dark matter velocities in the Milky Way. If a supernova
remnant is close enough to Earth, and the appropriate age, this flux of
high-velocity dark matter could be detectable in direct detection experiments,
particularly if the dark matter interacts via a velocity-dependent operator.
This could make it easier to detect light dark matter that would otherwise have
too little energy to be detected. We show that the Monogem Ring supernova
remnant is both close enough and the correct age to produce such a flux, and
thus we produce novel direct detection constraints and sensitivities for future
experiments.Comment: 8 Pages of Text, 3 Figure
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Solution-reactor-produced Mo-99 using activated carbon to remore I-131
The production of {sup 99}Mo in a solution reactor was explored. Activated charcoal was used to filter the {sup 131}I contaminant from an irradiated fuel solution. Gamma spectroscopy confirmed that the activated carbon trapped a significant amount of {sup 131}I, as well as notable amounts of {sup 133}Xe, {sup 105}Rb, and {sup 140}Ba; the carbon trapped a diminutive amount of {sup 99}Mo. The results promote the idea of solution-reactor-produced {sup 99}Mo. Solution reactors are favorable both energetically and environmentally. A solution reactor could provide enough {sup 99}Mo/{sup 99m}Te to support both the current and future radiopharmaceutical needs of the U.S
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