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免费调研报告下载

Comparingcollaborativeco-locatedanddistributeddesignprocessesindigitalandtraditionalsketchingenvironments:

A 

protocolstudyusingthefunction–behaviour–structurecodingscheme 

OriginalResearchArticle

DesignStudies,Volume32,Issue1,January2011,Pages1-29

H.H.Tang,Y.Y.Lee,J.S.Gero

Closepreview 

| 

PDF（1474K） 

Relatedarticles 

Relatedreferenceworkarticles 

AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences

Thisstudycomparesthedesignprocessesofdesignersinbothdigitalandtraditionalsketchingenvironments,wherethedigitalenvironmentemulatesthetraditionalface-to-face,pen-and-paperenvironment.Thedesignprocesseswereempiricallyexaminedthroughprotocolanalysisusingacodingschemebasedonthefunction–behaviour–structureontology.Thedistributionsofthedifferenttypesofsegments,andtheirtransitionsinthetwoenvironmentswerequantitativelycomparedusingChi-SquaretestsandPaired-Ttests.Theresultsindicatethatthedesignprocessesinthetwoenvironmentswerenotstatisticallydifferentintermsoftheirdistributionsandtransitions.Thehigher-levelcognitiveactivitieswerenotaffectedbythechangeofmedium.Someimplicationsfordesigncomputinganddesignpracticearediscussed.

ArticleOutline

1.Protocolanalysis

1.1.Thefunction–behavior–structureontology

2.Methods

2.1.Experimentaldesign

2.1.1.Participants

2.1.2.Designbrief

2.1.3.Evaluation

2.1.4.Digitalandtraditionalenvironments

2.1.5.Procedure

2.2.Analysis

2.2.1.Scores

2.2.2.Segmentationandencodingofprotocol

2.2.3.Statisticalexamination

3.Comparativeresults

3.1.Comparingthedesignresults

3.2.Comparingsegmentnumbers

3.3.Comparingthedistributionsoffunction–behaviour–structure

3.4.Comparingthetransitionsbetweensegments

4.Discussion

4.1.Differencesbetweenthedigitalandtraditionalenvironments

4.2.Influenceofmediaorotherpossiblereasons

4.2.1.Thetypeofmedia

4.2.2.Collocationversusremotecollaboration

5.Conclusions

Acknowledgements

Appendix.Appendix

References

202

TheWICKProprotocolwiththePacketDeliveryRatiometric 

ComputerCommunications,InPress,CorrectedProof,Availableonline21March2011

Jesú

sAí

sa,José

LuisVillarroel

Abstract

Wirelessmeshnetworks（WMNs）withchaintopologiesareveryusefulinroadandrailroadtransportationorintunnelandmineapplications.TheproposedprotocolsforWMNsusuallysupportbest-efforttrafficorsomekindofQualityofService（QoS）.However,someapplicationssuchasremote-controlledmachinesinindustrialcontrolnetworkshavehardreal-time（HRT）requirements,i.e.,strictdeadlines.Forthisreason,thispaperincorporatesthePacketDeliveryRatio（PDR）metricintotheWICKPro（WIrelessChainnetworKProtocol）protocol,aHRTprotocolforWMNswithchaintopologieswhichusesatoken-passingapproach.WICKProisaMediumAccessControl（MAC）protocolbasedontheideasoftheTimed-tokenprotocolandthecyclicexecutive.TheincorporationofthePDRmetricletscalculatetheneededtimetobereservedwherepacketretransmissionscanbeaccommodatedwhilesatisfyingHRTtrafficconstraints.Moreover,thefeasibilityofusingthePDRmetricinatoken-passingprotocolisshown.SinceWICKProhasbeendesignedtoworkontopofIEEE802.11,wemadeatestbedusingcommercial802.11wirelesscardsandcomparedtheWICKPro’sperformancewiththe802.11protocolandthreespecificprotocolsforWMNswithchaintopologies.

1.Introduction

2.Relatedwork

2.1.MACprotocolsforadhocnetworks

2.2.MACprotocolsforWMNswithchaintopologiesover802.11

2.3.Linkqualityinwirelessnetworks

3.WIrelessChainnetworKProtocol（WICKPro）

3.1.Networkdescription

3.2.Protocoloverview

3.3.Metric

3.3.1.PacketDeliveryRatio

3.3.2.HowtocalculatethePacketDeliveryRatio

3.4.Scheduling

3.4.1.Adaptedcyclicexecutive

3.4.2.Temporalmargininminorcycles

3.4.3.Schedulingcalculationexample

3.5.Errorhandlingandretransmissionprocedure

3.6.Flowacceptanceandremovingprocedure

3.7.Packetsdefinition

4.Evaluation

4.1.End-to-endthroughput

4.2.Throughputwithnon-uniformtraffic

4.3.HRTscheduling

Purchase

$41.95

203

Reconstructingsocialinteractionsusinganunreliablewirelesssensornetwork 

ComputerCommunications,Volume34,Issue5,15April2011,Pages609-618

A.Friggeri,G.Chelius,E.Fleury,A.Fraboulet,F.Mentré

J.C.Lucet

Intheveryactivefieldofcomplexnetworks,researchadvanceshavelargelybeenstimulatedbytheavailabilityofempiricaldataandtheincreaseincomputationalpowerneededfortheiranalysis.Theseworkshaveledtotheidentificationofsimilaritiesinthestructuresofsuchnetworksarisinginverydifferentfields,andtothedevelopmentofabodyofknowledge,toolsandmethodsfortheirstudy.

Whilemanyinterestingquestionsremainopenonthesubjectofstaticnetworks,challengingissuesarisefromthestudyofdynamicnetworks.Inparticular,themeasurement,analysisandmodelingofsocialinteractionsarefirstclassconcerns.

Inthisarticle,weaddressthechallengesofcapturingphysicalproximityandsocialinteractionbymeansofawirelessnetwork.Inparticular,asaconcretecasestudy,weexhibitthedeploymentofawirelesssensornetworkappliedtothemeasurementofhealthcareworkers’exposuretotuberculosis-infectedpatientsinaserviceunitoftheBichat–ClaudeBernardhospitalinParis,France.ThisnetworkhascontinuouslymonitoredthepresenceofallHCWsinallroomsoftheserviceduringathreemonthperiod.

Webothdescribethemeasurementsystemthatwasdeployedandsomeearlyanalysisonthemeasureddata.Wehighlightthebiasintroducedbythemeasurementsystemreliabilityandprovideareconstructionmethodwhichnotonlyleadstoasignificantlymorecoherentandrealisticdatasetbutalsoevidencesphenomenaapriorihiddenintherawdata.Bythisanalysis,wesuggestthataprocessingstepisrequiredpriortoanyadequateexploitationofdatagatheredthankstoanon-fullyreliablemeasurementarchitecture.

2.Contributions

3.TheTubExpoproject

3.1.Thehealthcarecontext:

tuberculosis

3.2.Visitmeasurement:

methods

3.2.1.Method1:

audits

3.2.2.Method2:

WSN

4.AWSNforpresencedetection

5.Hardwareandprotocoldetails

5.1.Hardware

5.2.Neighbordiscoveryprotocol

5.3.Versatilityoftheradiomedium

5.4.Protocoldimensioning

6.Rawdata–observations

7.Errormodel

7.1.Falsenegatives

7.2.Falsepositives

8.Reconstructionmethod

8.1.Minimalintercontactduration

8.2.Minimalvisitduration

9.Results

9.1.Intercontacts

9.2.Visits

9.3.Somestatistics

10.Conclusion

204

Softwareautomatedtesting:

Asolutiontomaximizethetestplancoverageandtoincreasesoftwarereliabilityandqualityinuse 

ComputerStandards&

Interfaces,Volume33,Issue2,February2011,Pages152-158

MarcantonioCatelani,LorenzoCiani,ValeriaL.Scarano,AlessandroBacioccola

PDF（1054K） 

Softwareplaysanincreasinglyimportantroleincomplexsystems,especiallyforhigh-techapplicationsinvolvedinimportantfields,suchastransportation,financialmanagement,communication,biomedicalapplicationsandsoon.Forthesesystems,performancessuchasefficientoperation,faulttolerance,safetyandsecurityhavetobeguaranteedbytheso