Title:
The challenge of deployment

Keywords:
challenged networks

Abstract:
... low-cost network in the field is not just a technological challenge, , but an exercise in the introduction of technology in ...

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The challenge of deploymentThe Challenge of DeploymentSrinivasan KeshavSchool of Computer Science, University of WaterlooWaterloo, Ontario, ...

Title:
Grand challenges on the theory of modeling and simulation

Keywords:
grand challenges

Abstract:
... was held in Dagstuhl, Germany, to reflect on the grand challenges facing M&S. Ten years on, a series of M& S ... M&S. Ten years on, a series of M& S Grand Challenge activities are marking a decade of progress and are providing ... to reflect and plan for the future. This second Grand Challenge Panel brings together a new set of experts from both ... from both industry and academia to reflect on M&S Grand Challenges. . Themes include big simulation, coordinated modeling, large scale systems ...

References:
Brutzman, D., Zyda, M., Pullen, J. M. and Morse, K. L. 2002. "Extensible Modeling and Simulation Framework (XMSF) Challenges for Web-Based Modeling and Simulation." NPS Report, Monterey, CA, October
National Science Foundation, Advisory Committee for Cyberinfrastructure Task Force on Grand Challenges, Final Report, March 2011.
Taylor, S. J. E., Fishwick, P. A., Fujimoto, R., Page, E. H., Uhrmacher, A. M., Wainer, G. 2012. "Panel on Grand Challenges for Modeling and Simulation." In Proceedings of the Winter Simulation Conference 2012, Berlin, Germany.

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Grand Challenges on the Theory of Modeling and Simulation Simon J E ... was held in Dagstuhl, Germany, to reflect on the grand challenges facing M&S. Ten years on, a series of M& S ... M&S. Ten years on, a series of M& S Grand Challenge activities are marking a decade of progress and are providing ... to reflect and plan for the future. This second Grand Challenge Panel brings together a new set of experts from both ... from both industry and academia to reflect on M&S Grand Challenges. . Themes include big simulation, coordinated modeling, large scale systems ... and those just beginning their career. Keywords: Modeling, Simulation, Grand Challenges 1. INTRODUCTION Modeling & Simulation (M&S) is used in many ... was held in Dagstuhl, Germany, to reflect on the grand challenges facing M&S. The report is still accessible (www.dagstuhl.de/02351) and it ... is interesting to reflect on the degree to which these challenges have been met and the degree to which these still ... met and the degree to which these still present a challenge. ... . Ten years on, a series of M& S Grand Challenge activities are marking a decade of progress and are providing ... of this new phase of activities was the M&S Grand Challenge Panel at the 2012 Winter Simulation Conference [Taylor, et al. ... simulation science, spatial simulation, and ubiquitous simulation. This second Grand Challenge Panel brings together a new set of experts from both ... from both industry and academia to reflect on M&S Grand Challenges. . Themes presented here both complement and extend the first ... I introduce the term ?big simulation? to describe a grand challenge for the modeling and simulation research community. This term describes ... likely grow significantly in scale and complexity. Embedded in this challenge
systems design, combining commercial and open source models, a challenge in its own right. Solutions to big simulation problems will ... simulation solutions and by working within these domains, this grand challenge may be addressed. 3. KATHERINE L MORSE 3.1. Modeling vs. ... implementing a model over time. By definition, a modeling grand challenge is one of representation while a simulation grand challenge is one of infrastructure and engineering. 3.2. Modeling Grand Challenge ? Human Behavior The most significant and unanswered modeling challenge, , in my opinion is human behavior, both representation and ... panel are provided in the paper. Areas identified as extremely challenging (?very complex domain; standards problematic?) were considered to need more ...
3.3. Simulation Grand Challenge ? Composability Composability is still our biggest simulation challenge. . Rather than address the fundamental problem, individual programs that ... have been achieved to a satisfactory extent 3.4. The Real Challenge If you had asked me this same question 5-10 years ... are not addressing the known problems. So, the real Grand Challenge is political will and funding. 4. ANDREAS TOLK 4.1. Cloud-based ... MSaaS can easily evolve into one of the new grand challenges. . The idea to web-enable simulations and simulation services is ...
... generated and thus the original findings are not exceptional. The challenge before the M&S community is to develop strategies for replicability ... Sharing Tools Authoring, Version control, View/distribute/transform, Quality control Among the challenges that need to be addressed include the following: ? What ... the engineering of desired attributes into computational models? A critical challenge will be in evaluating how replicability-aware scholarly communication, process, infrastructure, ...
... LEGO blocks). In this context, selected Modeling and Simulation (M&S) challenges are explored in more detail in the following paragraphs. 6.1. ... paragraphs. 6.1. Democratization of Modeling and Simulation The first grand challenge is related to collaboration on complex system design and its ... adoption (here also called democratization) of such technologies is a challenge and the key enabler for successful progress on system design. ... a mass M&S user. 6.2. Multi-Domain Design The next grand challenge relates to the mathematical and technical viewpoints. Thus far, many ... granted [National Science Foundation, 2011]. However, computational advances constitute a challenge and are necessary to address the scalability of M&S methods. ... are necessary to address the scalability of M&S methods. Modeling challenges such as heterogeneity, multi-physics couplings, multi-scale and multi-rate behavior, uncertainty, ... various fields. 6.3. Execution and Targeting Hardware Platforms Another grand challenge arises when taking the results of M&S and implementing them ... exploited for industrial purposes. Hence, targeting hardware platforms is a challenge
... a designer. 6.4. Education The multi-domain cooperation is certainly a challenge in academia. Collaboration between disciplines and organizations is a necessity, ... to push the envelope of technology and applications. The educational challenge is further heightened because of the difficulties posed by the ... disciplines within a particular model. In conclusion, all the M&S challenges listed above relate to each other and are by no ... has presented a wide range of views on M&S Grand Challenges. . We hope that these will help both practitioners and ... and Morse, K.L. 2002. ?Extensible Modeling and Simulation Framework (XMSF) Challenges for Web-Based Modeling and Simulation.? NPS Report, Monterey, CA, October ...
... Science Foundation, Advisory Committee for Cyberinfrastructure Task Force on Grand Challenges, , Final Report, March 2011. Sokolov, A.P., et al. 2005. ... Page, E.H., Uhrmacher, A.M., Wainer, G. 2012. ?Panel on Grand Challenges for Modeling and Simulation.? In Proceedings of the Winter Simulation ... Taylor is the convener of this new phase of Grand Challenge activities. He is the Founder and Chair of the COTS ...

Title:
AVEC 2015: The 5th International Audio/Visual Emotion Challenge and Workshop

Keywords:
challenge

Abstract:
<p>The fifth Audio-Visual Emotion Challenge and workshop AVEC 2015 was held in conjunction ACM Multimedia'15. ...

References:
A. Dhall, R. Goecke, J. Joshi, K. Sikka, and T. Gedeon. Emotion Recognition In The Wild Challenge 2014: Baseline, Data and Protocol. In Proc. ICMI, pages 461--466, Istanbul, Turkey, November 2014. ACM.
EC 2015 -- The First Affect Recognition Challenge Bridging Across Audio, Video, and Physiological Data. In Proceedings of the 5th International Workshop on Audio/Visual Emotion Challenge (AVEC), ACM MM, Brisbane, Australia, October 2015.
B. Schuller, M. Valstar, F. Eyben, R. Cowie, and M. Pantic. AVEC 2012 -- The Continuous Audio/Visual Emotion Challenge. In Proc. ICMI, pages 449--456, Santa Monica (CA), USA, October 2012. ACM.
B. Schuller, M. Valstar, F. Eyben, G. McKeown, R. Cowie, and M. Pantic. AVEC 2011 - The First International Audio/Visual Emotion Challenge. In Proc. ACII 2011, volume II, pages 415--424, Memphis (TN), USA, October 2011. Springer.
M. Valstar, B. Schuller, J. Krajewski, R. Cowie, and M. Pantic. Workshop summary for the 3rd international audio/visual emotion challenge and workshop (AVEC'13). In Proc. MM, pages 1085--1086, Barcelona, Spain, October 2013. ACM.
M. Valstar, B. Schuller, J. Krajewski, R. Cowie, and M. Pantic. AVEC 2014: the 4th international audio/visual emotion challenge and workshop. In Proc. MM, pages 1243--1244, Orlando (FL), USA, November 2014. ACM.

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AVEC 2015 ? The 5th InternationalAudio/Visual Emotion Challenge and WorkshopFabien RingevalUniversity of PassauChair of Complex & IntelligentSystemsPassau, GermanyBj rn ... UKMaja Pantic?Imperial College LondonIntelligent BehaviourUnderstanding GroupLondon, UKABSTRACTThe fifth Audio-Visual Emotion Challenge and workshopAVEC 2015 was held in conjunction ACM Multimedia?15.Like the ... Recognition]: ApplicationsGeneral TermsTheoryKeywordsAffective Computing, Multimodality, Challenge1. INTRODUCTIONThis year?s Audio-Visual Emotion Challenge and workshop(AVEC 2015) has been organised in conjunction with the ... be noted in the meanwhile, e.g.,[1, 7].The goal of the Challenge is to provide a common benchmarktest set for multimodal information ... real world.We were calling for teams to participate in a Challenge of fully-continuous emotion detection from audio, or video, or physiologi-cal ... affect in two dimensions: arousal and valence.Besides participation in the Challenge we were calling for papersaddressing the overall topics of this ... and outline the conditions for participation in particularin the competitive challenge event. We further acknowledge thosethat helped turn AVEC 2015 into ... over the world. 13 teamssubmitted results for the emotion recognition challenge ? overall,at the moment of writing over 38 submissions of ...
... for researchers and developers in the area of multimodalemotion recognition.3. CHALLENGE CONDITIONSA baseline paper explaining the dataset, the challenge evaluationprocedure, baseline features and baseline results was made avail-able during ... features and baseline results was made avail-able during the ongoing challenge [3]. In order to ensure the correctuse of the recordings ... of these five submissions. Further, the top-two per-formers of the Challenge were asked to submit their program tothe organisers at University ... of University of Can-berra, followed by an introduction to the challenge, , a series of pa-per presentations (oral), a demo session, ... demo session, a panel discussion andfinally an overview of the challenge results and an announcementof the winners of the Challenge. . The organisers ? the authors ofthis summary ? would ... The authors would further like tothank the sponsors of the challenge, , the Association for the Ad-vancement of Affective Computing (AAAC) ... Joshi, K. Sikka, and T. Gedeon.Emotion Recognition In The Wild Challenge 2014: Baseline,Data and Protocol. In Proc. ICMI, pages 461?466, Istanbul,Turkey, ... Cowie, and M. Pantic. AV+EC 2015 ? TheFirst Affect Recognition Challenge Bridging Across Audio,Video, and Physiological Data. In Proceedings of the ...
... Cowie,and M. Pantic. AVEC 2011 - The First InternationalAudio/Visual Emotion Challenge. . In Proc. ACII 2011,volume II, pages 415?424, Memphis (TN), ... Cowie, and M. Pantic.Workshop summary for the 3rd international audio/visualemotion challenge and workshop (AVEC?13). In Proc. MM,pages 1085?1086, Barcelona, Spain, October ... R. Cowie, andM. Pantic. AVEC 2014: the 4th international audio/visualemotion challenge and workshop. In Proc. MM, pages1243?1244, Orlando (FL), USA, November ...

Keywords:
challenged networks

Abstract:
... rich storage model to fulfill the data transmission requirements of challenged networking environments, which are characterised by long delays and frequent ... provide a solution that overcomes many of the data transmission challenges of DTNs: a semantically rich storage system (Datom) and a ... run on resource-constrained devices. It facilitates meaningful data exchanges in challenged networks supporting the principle of infrastructure-independent networking, and exploiting human ...

References:
K. Fall. A Delay-Tolerant Network Architecture for Challenged Internets. In Proc. of the 2003 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communications (SIGCOMM'03), pages 27--34. ACM Press, 2003.
J. Leguay, A. Lindgren, J. Scott, T. Friedman, and J. Crowcroft. Opportunistic content distribution in an urban setting. In Proc. of the 2006 SIGCOMM Workshop on Challenged Networks (CHANTS '06), pages 205--212, New York, NY, USA, 2006. ACM Press.

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... to provide a solution that overcomes many of thedata transmission challenges of DTNs: a semantically richstorage system (Datom) and a network ... systems to run onresource-constrained devices. It facilitates meaningful dataexchanges in challenged networks supporting the principle ofinfrastructure-independent networking, and exploiting hu-man mobility ... Design]: Network communications; E.2[Data Storage Representations]: Linked representations.General Terms: Design.Keywords: challenged networks, data management.1. INTRODUCTIONIn this paper, we put forward the ... Montr al, Qu bec, Canada.Copyright 2007 ACM 978-1-59593-737-7/07/0009 ...$5.00.cations to overcome the challenges posed by data exchangein DTNs [7,22]. Unlike traditional infrastructure-based com-munication ...
... data navigation is notpossible. This is a major shortcoming in challenged net-works, an environment in which data exchanges are inter-mittent and ...
... be managed more ?exibly.Evidence that short contact times are a challenge in realitycan be obtained from the analysis of contact times ... commu-nications.6. RELATED WORKMost work in the area of DTNs and challenged networksfocuses on proposing new architectures, as well as routingand delivery ... classical view of ?le data does not helpto overcome the challenges of long delays and disruptions,or to fully exploit the opportunistic ...
... interesting discussion on the open issues of data manage-ment in challenged networks during the workshop, a topicthat has not been studied ...

Keywords:
challenges

Abstract:
... Nevertheless, they are necessary, as scientific contributions need to be challengeable. . Significant progress in areas such as measurement, controlled experiments, ... increased significantly by means of books, conferences &#38; journals! Future challenges include attracting more industrial contributions to the existing body of ... create more trustful evidences, and aggregation of empirical results. These challenges

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... Nevertheless, they are necessary, as scientific contributions need to be challengeable. . Significant progress in areas such as measurement, controlled experiments, ... increased significantly by means of books, conferences & journals! Future challenges include attracting more industrial contributions to the existing body of ... create more trustful evidences, and aggregation of empirical results. These challenges require community efforts. Index Terms?Empirical Studies, industry, challenges I. HISTORY Empirical studies in Software Engineering (SE) have been ...

Title:
Exascale computing: the challenges and opportunities in the next decade

Keywords:
challenges

Abstract:
... will be materially transformed by exascale computers.</p> <p>Meeting the exascale challenge will require significant innovation in technology, architecture and programmability. Power ... discuss the importance of exascale computing and address the major challenges, , touching on the areas of technology, architecture, reliability and ...

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Microsoft Word - ppopp15kn-AgerwalaKeynote Exascale Computing: The challenges and opportunities in the next decade Dr. Tilak Agerwala VP ... will be materially transformed by exascale computers. Meeting the exascale challenge will require significant innovation in technology, architecture and programmability. Power ... discuss the importance of exascale computing and address the major challenges, , touching on the areas of technology, architecture, reliability and ...

Title:
Seven challenges for RESTful transaction models

Keywords:
challenges

Abstract:
... analyze the state-of-the-art RESTful transaction models and identify the current challenges.

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Seven Challenges for RESTful Transaction ModelsNandana Mihindukulasooriya, Miguel Esteban-Guti rrez, Ra l Garc a-CastroCenter for ...
... we analyze thestate-of-the-art to this extent and identify the current challenges forREST-compliant strongly consistent transaction models.The rest of the paper is ...
... some of thescenarios identified in Table 1 due to some challenges for RESTfultransaction processing that will be discussed in the next ... RESTfultransaction processing that will be discussed in the next section.3. CHALLENGES FOR RESTFUL TRANS-ACTIONSBased on the analysis of the existing transaction ... different characteristics of RESTful transactionscenarios, we have identified the following challenges. .3.1 Decentralized authoritiesTransactions that involve resources managed by multiple author-ities ... resources managed by multiple author-ities is one of the main challenges in current RESTful transactionmodels. The main problem of decentralized authorities ... the RESTful transaction models do not cover thisscenario and the challenge is the design a stateful consensus protocolwithout violating REST constraints.3.2 ... resources and how timestamps canbe used consistently still remains a challenge to be solved.3.3 Statelessness and isolationThe statelessness REST constraint states ... state butapplication (or session) state. Furthermore, this approach introducesa new challenge: : link transparency. When working with temporaryresources, it is necessary ...
... How-ever, the enforcement of two-phase locking and achieving fairnessremains a challenge for the RESTful transaction models.Another alternative is to use optimistic ... when the same state is exposed via multipleresources remains a challenge for RESTful transaction models.3.6 Heuristic generationMost of the transaction models ... [12, 13]. In this case, generating a suitable timeout isa challenge because it not only affects the performance but thecorrectness of ... algorithms nor guidelines forheuristic generation, and thus remains as a challenge. .5http://atompub.org/6http://www.w3.org/TR/ldp/9513.7 Gap between research and industryThough several transaction models have ... supported by the currentmodels.In this paper we have identified several challenges that have beenoverlooked by current models, which have to be ... be considered whenaddressing the uncovered RESTful transaction scenarios. Some ofthe challenges are similar to those faced by distributed databasetransactions (i.e., decentralized ...

Title:
Biomedical CyberInfrastructure challenges

Keywords:
challenges

Abstract:
... mature along this road. In this article, we discuss such challenges that we encountered in this field and possible solutions from ...

References:
B. Demchak, V. Ermagan, C. Farcas, E. Farcas, I. H. Krüger, and M. Menarini, "Rich Services: Addressing Challenges of Ultra-Large-Scale Software-Intensive Systems," in Proceedings of the ICSE 2nd International Workshop on Ultra-Large-Scale Software-Intensive Systems (ULSSIS 2008), Leipzig, Germany. New York, NY, USA: ACM, May 2008, pp. 29--32.

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Proceedings Template - WORDBiomedical CyberInfrastructure Challenges Claudiu Farcas Natasha Balac University of California, San Diego 9500 ... mature along this road. In this article, we discuss such challenges that we encountered in this field and possible solutions from ... Security, Human Factors, Standardization, Legal Aspects, Verification. Keywords Biomedical, cyberinfrastructure, challenges 1. INTRODUCTION The discipline of biomedical computing and informatics has ... to highly sophisticated, mostly proprietary e-Health records sys-tems. While, these challenges significantly impair the nation?s ability to deliver better healthcare for ... greatly benefit from advancements in cyber-infrastructure research, along with the challenges we encountered in a number of projects from this field. ...
... traditional siloes of health-related in-formation. Hence, the researchers face new challenges in finding relevant data, acquiring and using the data for ... results with their peers and other healthcare sector partakers. 3. CHALLENGES There are several obstacles to resource sharing in biomedical re-search: ... annota-tion, analysis and anonymization. In this section, we detail some challenges we encountered across multiple projects in the biomed-ical field. Comprehensive ...
... across international boundaries. Without being the best solution to all challenges pre-sented in this article, we think iDASH brings significant capabili-ties ... Farcas, I. H. Kr ger, and M. Menarini, ?Rich Services: Addressing Challenges of Ultra-Large-Scale Software-Intensive Systems,? in Proceed-ings of the ICSE 2nd ...

Title:
Traceability challenge 2011: using TraceLab to evaluate the impact of local versus global IDF on trace retrieval

Keywords:
challenge

Abstract:
... to weight various terms. In this paper we address Grand Challenge C-GC1 by comparing the effectiveness of computing idf based only ... documented in the American National Corpus. We also address Grand Challenges L-GC1 and L-GC2 by setting ourselves the additional task of ...

References:
J. Cleland-Huang, A. Czauderna, A. Dekhtyar, O. Gotel, J. Huffman Hayes, E. Keenan, G. Leach, J. Maletic, D. Poshyvanyk, Y. Shin, A. Zisman, G. Antonio, B. Berenbach, A. Egyed, and P. Maeder. Grand challenges, benchmarks, and tracelab: Developing infrastructure for the software traceability research community. 2011.
J. Cleland-Huang, A. Dekhtyar, J. Huffman Hayes, G. Antoniol, B. Berenbach, A. Egyed, S. Ferguson, J. Maletic, and A. Zisman. Grand Challenges of Traceability. Center of Excellence for Software Traceability, http://www.coest.org, 2006.

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Traceability Challenge 2011: Using TraceLab to Evaluate the Impact of Local versus ... the Impact of Local versus Global IDF on Trace RetrievalTraceability Challenge 2011: Using TraceLab to Evaluatethe Impact of Local versus Global ... frequency)technique to weight various terms. In this paper we addressGrand Challenge C-GC1 by comparing the effectiveness ofcomputing idf based only on ... as docu-mented in the American National Corpus. We also addressGrand Challenges L-GC1 and L-GC2 by setting ourselvesthe additional task of designing ... Results are evaluated againstfour different datasets.Our experiment directly addresses three challenges fromthe Grand Challenges of Traceability (GCT). The first chal-lenge, C-GC1 [4] is related ... their occurrence in project spe-cific artifacts?? The second set of challenges, , L-GC1 andL-GC2 [4], are related to defining standard processes, ... is designed for modeling and executing trace-ability experiments. This traceability challenge representsthe first time TraceLab has been used to formally conducta ...
... A. Zisman,G. Antonio, B. Berenbach, A. Egyed, and P. Maeder.Grand challenges, , benchmarks, and tracelab:Developing infrastructure for the software traceabilityresearch community. ... Berenbach, A. Egyed, S. Ferguson,J. Maletic, and A. Zisman. Grand Challenges ofTraceability. Center of Excellence for SoftwareTraceability, http://www.coest.org, 2006.[5] J. Huffman ...

Keywords:
challenges

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... ride, SCAD kept true to ambitions and plans, conquering daily challenges in their preparation for opening their fourth distinct, yet complimentary ...
... better serve their students, faculty and staff. SCAD accepted this challenge and in 2006 ACA merged and became SCAD. Always looking ... in 2006 ACA merged and became SCAD. Always looking for challenges, , and armed with the experience and positive outcomes from ... Development Bureau held a contest to non-profit organizations worldwide. The challenge was to present how the non-profit would restore, revitalize and ...
... and policies quickly and efficiently allowed us to meet the challenges, , and will continue to foster consistency as we exponentially ...

Keywords:
challenged networks

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... projects.Categories and Subject DescriptorsD.2.0 [Software]: Software EngineeringGeneral TermsDesign, ManagementKeywordsattendance, voice, challenged networks1. INTRODUCTIONTracking attendance of remote agents is a fundamentalproblem that ...

Title:
What are the most important challenges for access control in new computing domains, such as mobile, cloud and cyber-physical systems?

Keywords:
challenges

Abstract:
... today's systems is access control. This panel will examine the challenges we face in adapting the access control models, techniques, and ...

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paper.dviWhat Are the Most Important Challenges for AccessControl in New Computing Domains, such as Mobile,Cloud and ... in today?s systems is accesscontrol. This panel will examine the challenges we face inadapting the access control models, techniques, and toolsproduced ... complex policies of tomorrow?This panel will identify and rank specific challenges withinthese areas. It will discuss the important aspects that re-search ...

Title:
Extreme scale computing: challenges and opportunities

Keywords:
challenges

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Extreme scale computing: challenges and opportunitiesPanel Extreme Scale Computing: Challenges and Opportunities Moderator: Josep Torrellas UIUC Panelists: Bill Gropp UIUC ... terascale performance. In this panel, we will discuss the resulting challenges in energy/power efficiency, concurrency and locality, resiliency and programmability, and ...

Keywords:
challenge

Keywords:
challenged networks

Abstract:
<p>Web acceleration mechanisms play an important role in challenged network environments where connectivity is limited or expensive. However, as ... We believe the next generation of web acceleration systems for challenged

References:
A. Reda, B. Noble, and Y. Haile. Distributing private data in challenged network environments. In WWW 2010. ACM, 2010.

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... We believe the next generation of web acceleration sys-tems for challenged networks need to have a strong personalcomponent.Categories and Subject DescriptorsC.2.0 ... Subject DescriptorsC.2.0 [Computer Communication Networks]: Local andWide-Area NetworksGeneral TermsMeasurmentKeywordsweb acceleration, challenged networks1. INTRODUCTIONWeb usage is growing largely personal. The most popu-lar ... services that cater to their personalpreferences and interests.Unfortunately, this creates challenges in designing andbuilding web acceleration mechanisms. These mechanismsare especially important ... where connectivity is poor and the network infras-tructure is generally challenged. . Even when good connec-tivity is available, it?s often very ...
... The personal anddynamic nature of web usage presents both a challenge andan opportunity in building web acceleration systems. Thechallenge is rethinking ...
... personalized web acceleration systems that bet-ter understand user behavior in challenged network environ-ments.Figure 7: First order Markov model prediction ac-curacy3.5 Associations ...
... understanding of user behavior is essential indesigning appropriate systems for challenged network envi-ronments. Our dataset is available for researchers to furtherinvestigate ... developingcountry contexts.Web usage acceleration is one important class of servicesfor challenged networks. There has been a lot of interestin this area ...
... web acceleration mechanisms. Web acceleration mecha-nisms are especially important in challenged network envi-ronments where connectivity is limited or expensive. How-ever, traditional ... A. Reda, B. Noble, and Y. Haile. Distributing private datain challenged network environments. In WWW 2010. ACM,2010.[21] T. W. Yan, M. ...

Title:
The challenge of recommender systems challenges

Keywords:
challenge

Abstract:
<p>Recommender System Challenges such as the Netflix Prize, KDD Cup, etc. have contributed ... and adoptability of recommender systems. Each year a number of challenges or contests are organized covering different aspects of recommendation. In ... present some of the factors involved in successfully organizing a challenge, , whether for reasons purely related to research, industrial challenges,

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The challenge of recommender systems challengesThe Challenge of Recommender Systems ChallengesAlan SaidTechnische Universita t BerlinBerlin, Germanyalan@dai-lab.deDomonkos TikkGravity R&DBudapest, ... Universita t BerlinBerlin, Germanyalan@dai-lab.deDomonkos TikkGravity R&DBudapest, Hungarydomonkos.tikk@gravityrd.comAndreas HothoUniversita t Wu rzburgWu rzburg, Germanyhotho@informatik.uni-wuerzburg.deABSTRACTRecommender System Challenges such as the Netflix Prize,KDD Cup, etc. have contributed vastly ... developmentand adoptability of recommender systems. Each year a num-ber of challenges or contests are organized covering differ-ent aspects of recommendation. In ... present some of the factors involved in successfully or-ganizing a challenge, , whether for reasons purely related toresearch, industrial challenges, , or to widen the scope of rec-ommender systems applications.Categories ... Systems]: Evaluation/methodologyGeneral TermsAlgorithms, Design, Experimentation, Human Factors, Mea-surement, PerformanceKeywordsbenchmarks, evaluation, challenge, , contest1. INTRODUCTIONWith the launch of the Netflix Prize1 in ... the launch of the Netflix Prize1 in 2006, recom-mender systems challenges, , or contests, allowed the every-man to access large-scale, real-world ... a commercial recommender system. Thousands of peo-ple participated in the challenge over its three year run.1http://www.netflixprize.comSubsequently, other challenges have been organized, bothby the industry2, as well as academia3, ... the industry2, as well as academia3, and today there areseveral challenges (large and small) organized on a yearlybasis. This tutorial gives ... yearlybasis. This tutorial gives an insight into the organization ofa challenge, , from planning and preparation of data, to theexecution and ... (Introduction), an introductionto previous and current recommender systems challengesis given. Challenge- -related topics are introduced and dis-cussed, e.g. datasets, evaluation details ... second part of the tutorial (Preparation, Execution &Evaluation of a challenge) ... ) covers the practicalities involvedin the process of organizing a challenge. . Topics such a eval-uation types (o?ine vs. online), anonymization ... part of the tutorial (Conclusion) theconcept of the recommender system challenge is revisited tosum up the most important aspects of the ... the most important aspects of the realization of arecommender systems challenge, , e.g. benchmarking, data,user-centricity.After the tutorial, a panel on recommender ... this tutorial is to elicit more interest inthe concept of challenges, , whether as an organizer or par-ticipant. Recommender systems challenges have undoubt-edly brought the related research forward. By organizing achallenge, ... those who would have not approached theproblem otherwise.2http://overstockreclabprize.com3e.g. the CAMRa Challenge http://www.camrachallenge.com or the ECML/PKDD Discovery Challenge - specifi-cally http://www.kde.cs.uni-kassel.de/ws/rsdc08/ andhttp://www.kde.cs.uni-kassel.de/ws/dc09/ Copyright is held by the author/owner(s). ... ACM 978-1-4503-1270-7/12/09. 94. OUTLINEThe tutorial starts with a presentation of challenge- -relatedconcepts and concludes with a panel discussion.? Introduction? History? Why ... and concludes with a panel discussion.? Introduction? History? Why recommender challenges are important?? Requirements of recommender systems to be eval-uated? Execution? ... and hybrid recommender systems.He has been a co-chair of the Challenges
... last decade. His team, Gravity, partici-pated at the Netflix Prize challenge, , and was a leader of theThe Ensemble team finished ... held inconjunction with ACM RecSys and the ECML PKDD Dis-covery Challenge in 2008 and 2009. He worked as a reviewerfor journals ...

Title:
Not doing but thinking: the role of challenge in the gaming experience

Keywords:
challenge

Abstract:
... of videogames has shown the importance of the role of challenge in producing a good experience. However, defining exactly which challenges are important and which aspects of gaming experience are affected ... In this paper, we investigate if altering the level of challenge in a videogame influences people's experience of immersion. Our first ... use time pressure to make games more physically <i>and</i> cognitively challenging. . We find that the addition of time pressure increases ... increases immersion as predicted. We argue that the level of challenge experienced is an interaction between the level of expertise of ... the level of expertise of the gamer and the cognitive challenge

References:
Hsu, S. H., Wen, M. H., Wu, M. C. (2007) Exploring design features for enhancing players challenge in strategy games. Cyberpsychology & Behaviour 10 (3), 393--397.

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... Word - Cox_FINAL_CHI2012USpaperformat.doc Not Doing But Thinking: The Role of Challenge in the Gaming Experience Anna L Cox UCL Interaction Centre ... of videogames has shown the importance of the role of challenge in producing a good experience. However, defining exactly which challenges are important and which aspects of gaming experience are affected ... In this paper, we investigate if altering the level of challenge in a videogame influences people's experience of immersion. Our first ... use time pressure to make games more physically and cognitively challenging. . We find that the addition of time pressure increases ... increases immersion as predicted. We argue that the level of challenge experienced is an interaction between the level of expertise of ... the level of expertise of the gamer and the cognitive challenge encompassed within the game. Author Keywords Games; immersion; challenge. . ACM Classification Keywords K.8.0 Personal Computing: General - Games ... to address one such question by considering the role of challenge in GX. Permission to make digital or hard copies of ...
... Flow is an extreme experience combining elements of skill, progress, challenge and focus to produce an optimal experience. It is best ... The player is somewhat immersed but definitely not in flow. Challenge Across the several different GX theories, there are concepts that ... occur as important constituents of GX. One such concept is challenge. . Indeed, without a challenge that is perceived as worthy, games are simply not enjoyed ... worthy, games are simply not enjoyed as much [16]. However, challenge, , as used in this context, is that reported by ... reflection of their experience. How this relates to the actual challenge presented by games has only begun to be examined [22] ... to be examined [22] and even then the definition of challenge is purely in terms of players? perception of difficulty. It ... difficulty. It is possible that respondents to a questionnaire incorporating challenge elements are merely asserting the challenge experienced as some sort of halo response to a generally ... none of the approaches are precise about what specifically the challenges are that lead to a particularly good (or bad) GX. ... Designers of games necessarily consider how to make a game challenging to the gamer [23]. There are two main ways to ... Immersion is believed to specifically arise from the level of challenge experienced by gamers. As such, challenge, , as perceived by the player, is a component that ... aspects of GX, what is undefined is what sort of challenge is required in order to increase the immersive experience. In ... the cognitive and physical abilities of a gamer can be challenged, , and investigate which has the greater effect on the ... also think faster. We hypothesise that it is the cognitive challenge that will have the greater effect on immersion. Expertise Csikszentmihalyi ... result of an appropriate balance between the perceived level of challenge and the person?s skills. Given the relationship between immersion and ...
... immersion is also sensitive to the balance between skill and challenge. . Therefore, in addition to manipulating time pressure and number ... We hypothesize that, if the gamer finds the game too challenging, , where this level of challenge is too high in proportion to their skills, they are ... gamers skills are too high and the game is not challenging enough, then Session: Game Experiences CHI 2012, May 5?10, 2012, ... therefore also explore the role of expertise in combination with challenge to see how the two together influence immersion. Overview of ... Overview of the experiments To experimentally investigate the role of challenge on immersion, it is necessary to manipulate games within the ... strictures of experimental control to provide the different sorts of challenge. . The ideal is two versions of the same game ... same game that differ only in the physical or cognitive challenge that they present. For the first experiment, manipulating physical challenge could have been done by simply requiring more actions to ... second and third experiments that intend to manipulate the cognitive challenge, , it is not enough to provide more difficult puzzles ... puzzles or tasks for players as such increases in cognitive challenge may leave the players unable to make any progress in ... tasks but at different rates. This contrasts with the physical challenge of the first experiment in that if players failed to ... experiment in that if players failed to meet the cognitive challenge in the second two experiments then the game would end ... the first experiment, failure to keep up with the physical challenge would not mean immediate game over and the players would ... time. Of course it must be acknowledged that in manipulating challenge whilst maintaining comparability between experimental conditions, it is difficult to ... conditions, it is difficult to completely disentangle physical and cognitive challenge. . Nonetheless, in the first experiment the emphasis of the ... first experiment the emphasis of the manipulation is on physical challenge whereas on the latter two it is on cognitive challenge. . It should also be noted that the first experiment ...
... control over the gameplay to achieve a manipulation of physical challenge whilst maintaining the level of cognitive challenge. . To do this, we used the notion of the ... be enough firepower to destroy the creeps. The only cognitive challenge would be where to place the towers and to a ...
... p = .045) and an interaction between expertise and physical challenge at a level approaching significance (F(1, 23) = 4.03, p ... 14.9 (2.75) 11.0 (2.83) Table 4. Mean (standard deviation) of challenge in the different expertise groups Analysing just the challenge factor of immersion, the means and sd for challenge are given in Table 4. The pattern of results is ... 4.42, p=0.047) but no interaction effect between expertise and physical challenge (F(1,23)=1.67, p=0.209). Discussion The experimental setup had the desired effects. ...
... deploy. The same picture is seen when considering only the challenge factor with high expertise group in the HEff condition rating ... with high expertise group in the HEff condition rating the challenge lowest. This may seem contradictory: the HEff condition should produce ... This may seem contradictory: the HEff condition should produce higher challenge. . It does however support the view that the questionnaire, ... the view that the questionnaire, measures the player?s perception of challenge in the context of the overall gaming experience, and that, ... and that, when evaluating the GX, the gamer values cognitive challenge rather than physical challenge ... (at least in this game genre).The low scores on the challenge factor suggest that the High expertise players found the HEff ... High expertise players found the HEff condition not to be challenging perhaps because it was an unfair or unreasonable challenge. . When a player is an expert, the challenge of this game is cognitive (identifying which towers are best ... addition of time pressure would manipulate the level of cognitive challenge within the game. This is because the player is not ... time pressure will have significantly higher overall immersion scores and ?challenge? ? scores than those who play the game under no ... focus in this study was on the explicit link between challenge and immersion, expertise was not considered in relation to challenge. . Instead of taking statistical account of it, it was ... between subjects design. The independent variable was the level of challenge in the experimental game, i.e. whether the game had time ...
... confirmed by paired samples t-tests: overall immersion scores t(10)=6.36, p<0.05); challenge t(10)=9.59, p<0.05. Questionnaire Scores Time Pressure No Time Pressure Total ... Pressure No Time Pressure Total immersion* 113.5 (11) 81.3 (8.60) Challenge* * 15.6 (1.12) 8.82 (1.78) Table 5. Mean (standard deviation) ... Mean (standard deviation) of the overall immersion score and the challenge factor score. Discussion There was no difference in the scores ... the overall immersion questionnaire scores and the scores for the challenge factor. This confirms our hypothesis that it is the addition ... confirms our hypothesis that it is the addition of cognitive challenge that impacts on the GX. In experiment 1 we argued ... the hypothesis that expertise interacts with the level of cognitive challenge imposed by the game and thereby mediates the level of ... were whilst playing the game, that was either high in challenge or low in challenge. . In this study, the challenge of the game was determined by the level at which ... playing the game, so the higher the level, the more challenging the game. The difference in levels is in the speed ... or high- level 6). This would indicate the level of challenge within the game. The between subjects variable was the level ... from above will increase, making it more difficult and more challenging for the gamer to decide how and where to place ...
... of computer games they enjoy playing and kind(s) they find challenging. . It also asked the participants whether they had played ... counterbalanced between participants. When in the level 1 (the low challenge) ) condition, they were allowed to complete levels 1 and ... level 3). The participants in the level 6 (the high challenge) ) condition were allowed to play the game until the ... a highly significant interaction, (F(1,18)=53.37, p<0.001). As the level of challenge increases, experts become more immersed in the game and novices ... of level of expertise (F(1,18)=0.93, p>0.05) or of level of challenge (F(1,18)=0.61, p>0.05), suggesting that the level of expertise in the ... in the game (expert or novice) and the level of challenge (low or high) do not vary significantly when expertise is ... 14.7 (2.41) 14 (2.21) Table 6: Descriptive statistics of the challenge factor scores of the low level and high level conditions. ... level conditions. Table 6 clearly shows that the experts mean challenge score for the high level condition was almost double that ... experts found the high level condition to be far more challenging than the low level condition. The novices however, had a ... level condition. The novices however, had a slightly higher mean challenge score in the low level condition than in the high ... level condition than in the high level condition. The mean challenge scores for both conditions are extremely high (given that the ... both conditions are extremely high (given that the maximum possible challenge score is 20) with a difference of just 0.7 between ... between the low level conditions. Discussion Whilst the effect of challenge shows no influence on immersion when there is no consideration ... in, there is a significant interaction showing that expertise and challenge interact in an important way in leading to immersion. This ... in flow whereby it is only through balancing skill and challenge that flow is achieved. Immersion however is a much more ... are less experienced are more immersed at lower levels of challenge and conversely those with more experience are more immersed at ... with more experience are more immersed at higher levels of challenge. . GENERAL DISCUSSION AND CONCLUSIONS The final experiment might give ... impression that immersion behaves like flow with a balance of challenge
... classic view of flow is that achieving the balance of challenge and expertise leads to the optimal experience, flow, and regardless ... the games. Immersion is higher though when the balance of challenge and expertise is better. This then supports the idea that ... of Tetris offers little subtlety: blocks fall and the only challenge is posed by how fast they fall. Thus experts at ... see the game, know the game and their expertise is challenged at higher levels. By contrast, tower defense Session: Game Experiences ... 5?10, 2012, Austin, Texas, USA86 games offer a variety of challenges where success requires strategic thinking and games vary substantially in ... These results suggest that whilst the balance of skill and challenge is important, it is also important that players perceive themselves ... skills. With Tetris, this was possible and so the higher challenge was more immersive. With the tower defense game of the ... the higher skill players recognized their inability to assess the challenge and therefore their skills in relation to the challenge. . These players were less immersed being less able to ... less able to deploy their higher skills against the higher challenge. . Lower expertise players however, unaware of the challenges they faced were much more able to just get on ... were able to be equally immersed regardless of the physical challenge they faced. High expertise is not only a matter of ... game whilst those with those with high expertise mis-perceived the challenge presented due to the shallow nature of the game and ... having stuff to do. Immersion does not arise from physical challenge but from the cognitive challenge of solving problems quickly not simply acting quickly. Our findings ... Whilst the many approaches to GX acknowledge the role of challenge in leading to positive gaming experiences, there has been little ... there has been little attempt to qualify what form these challenges must make and how they relate to players expertise. The ... to underpin GX from an objective perspective of what constitutes challenge. . Of course, this work only begins to scratch the ... only begins to scratch the surface of the types of challenge that games offer and the myriad of GX that can ... that can therefore arise. Further work should not only explore challenges arising at the basic level such as time pressure but ... collecting more bonus points. In addition, this research suggests that challenges at higher levels such as the level of strategy and ... the limitation of lab studies such as these and what challenges players expect over a longer term engagement with games are ... unspecified. Throughout all of this, it is also clear that challenge cannot be considered in isolation but must always be analysed ... expertise of players. Even this is not simple in that challenge is distinct from the perceived challenge as indicated in the first study so that when attempting ... that when attempting to achieve immersion through a balance of challenge and skill, players must first be able to perceive that ...
... M.H., Wu, M.C. (2007) Exploring design features for enhancing players challenge in strategy games. Cyberpsychology & Behaviour 10 (3), 393-397 15. ...

Keywords:
challenges

Abstract:
... causes of these failures remain often unexplored and unpublished. The challenges faced by researchers and practitioners are particularly complex when designing ... started with a promising idea, but failed or faced severe challenges. . This workshop will be the first at CHI focusing ...

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... causes of these failures remain often unexplored and unpublished. The challenges faced by researchers and practitioners are particularly complex when designing ... started with a promising idea, but failed or faced severe challenges. . This workshop will be the first at CHI focusing ... design of future (serious) games with/for children. Author Keywords Failure; Challenges; ; (Serious) Games; Development; Design; Evaluation; Children; Copyright is held ... provides another level of engagement, such active participation can create challenges in, and add complexity to, the design process. Khaled and ... complex process of the evolution of serious games and its challenges. . For example, design case descriptions do not convey the ...
... or a serious game, but that failed or faced severe challenges. . Such failures are rarely discussed in the CHI community ... is not limited to, the following topics: ? Failures and challenges, , e.g., experienced when developing (serious) games for children, in ... games for children, in contrast to success stories; ? Methodological challenges and benefits, e.g., to get the different stakeholders involved as ... for the different stakeholders); ? Development, e.g., what are technological challenges; ; how to include data mining such as learning analytics; ... game in the development process; ? Deployment, e.g., what are challenges of context-of-use; what are barriers for adoption by stakeholders (how ... conceptualization, design, development, deployment and validation) and list failures or challenges on a poster during the first break-out session. After the ... the groups come back together to abstract common dynamics surrounding challenges and failures, and generate lessons learned and guidelines for the ...

Title:
Challenges and research questions for testing in mobile development: report on a mobile testing activity

Keywords:
mobile testing challenges

Abstract:
... SPLASH 2013. Together with the workshop attendees, we listed the challenges in mobile testing and discussed a research agenda to deal ... and discussed a research agenda to deal with the significant challenges.

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Microsoft Word - mob13-dubinsky.doc Challenges and Research Questions for Testing in Mobile Development Report on ... SPLASH 2013. Together with the workshop attendees, we listed the challenges in mobile testing and discussed a research agenda to deal ... and discussed a research agenda to deal with the significant challenges. . Categories and Subject Descriptors D.2.9 [Management]: Software quality assurance. ... Software quality assurance. General Terms Reliability, verification. Keywords Mobile testing challenges. . 1. Activity Introduction The mobile testing activity was a ... The main goal was to collaborate on what are the challenges in mobile testing and suggest a research agenda to deal ... and suggest a research agenda to deal with the significant challenges. . The method includes personal reflection, group work, artifacts presentation, ... activity that meant to start future cooperation. 2. List of Challenges In the first part of the activity, we asked attendees ... enterprise mobile platforms. Specifically, we asked to suggest 2-3 significant challenges / themes that we need to deal with on the ...
... operations) 45. Compatibility with other connected devices 3. Prioritize the Challenges ... In the second part of the activity, we presented the challenges list and asked attendees to work in groups, review the ...

Keywords:
challenges

Abstract:
<p>Contests and challenges have energized researchers and focused attention in many fields recently, ... featured a panel reflecting on the then recently completed Netflix challenge. .</p> <p>Would additional contests help move the field of recommender ...

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... Germany Jesus Pindado Strands, Inc., USA PANEL OVERVIEW Contests and challenges have energized researchers and focused attention in many fields recently, ... featured a panel reflecting on the then recently completed Netflix challenge. . Would additional contests help move the field of recommender ... and effectiveness) General Terms: Algorithms, Experimentation, Human Factors, Measurement. Keywords: Challenges, , Contests, Recommender Systems. Joseph A. Konstan, University of Minnesota, ... bring together large sets of talented people to pursue a challenge. . Who could object? I will for two reasons ? ... what?s wanted, and often contests result in overconcentration on specific challenges to the detriment of the rest of the field. As ... the field. As a simple example, let?s consider the Netflix Challenge. . While it was enormously successful in getting bright people ... problem ? leaving aside the tractability of the algorithms, the challenge was about more accurate predictions. More accurate predictions for the ... Germany I was an organizer for the ECML PKDD Discovery Challenges in 2008 and 2009. The 2008 tasks involved spam detection ... papers on the Bibsonomy site. One innovative feature of this challenge was an online task that was integrated into the live ... to actually deliver the results to the user. The online challenge has allowed researcher to work with a heavily used system ... given information and time constraint are one of the future challenges. . Jesus Pindado, Strands, Inc., USA As VP of Strands ...