WELCOMETOTHEFIRSTISSUE! ByTERRYPILLING
Thisistheinauguralissueofanewsletterwewillperiodicallyreleasetokeep ourfriendsandformerstudentsinformed abouteventshappeningaroundtheUniversityofMaryEngineeringSchool,aswellastheeventsinthecommunityourstudentsareinvolvedin.Weplan toadoptaslightlydifferentformatfromthe typical‘newsletter’inthatnotonlywillwe tellyouwhatweareuptoandwhatwehave planned,butwealsoincludeactivitiesforthe reader!Weassumethatifyouarereadingour newsletteritislikelythatyouareeitheran engineeroryouareanengineeringstudent. Thismeansthatyouwantmorethanjusta bunchoffacts;youwantmentalchallengesas well!Soweplantoprovideyouwithboth.
Thisissuebeginswithasummaryof whereweareinthedesignanddevelopmentoftheUniversityofMaryEngineering School,alongwithanintroductiontoourcurrentfacultyandabriefhistoryofhowitall startedthreeyearsago.Wefollowthiswith newsfromthesummer,includingsomeofthe internshipsandprojectsourstudentswereinvolvedin,awordfromtheEngineeringClub, andarticlesfromeachofthebranchesofengineeringthatwecurrentlyoffer.Wediscuss thenumberofstudentsineachmajor,what wehavedonelatelytoimprovetheprogram andthefacilities,andwealsoincludesomeof theproblemsthatourstudentshavesolvedin theirclassesandwhichthereadermaywish totrytheirhandatiftheyaresoinclined.It mighttakeyoubacktothosegoodolddays asanengineeringstudent,whenyouloved nothingmorethantospendhoursuponhours, day,night,andweekends,studyingandsolvinghomeworkproblemsoneaftertheother whileyourfriendswereouthavingfun.
Finally,wehaveincludedsomeotherinterestingproblemsandpuzzles,includinga KenKenpuzzle,andanunsolvedmathproblem.
Thanksforbeingapartofourengineeringcommunity!
CURRENT FACULTY
TheSchoolofEngineeringhassevenfull timefacultyandfiveadjunctfacultyandis currentlyconductingasearchtohiresixmore fulltimefaculty,onetostartinJanuaryof 2019andtheotherfivetostartinthefallof 2019.Thecurrentfacultyareasfollows:
TerryPilling: TerryearnedhisBachelorofSciencedegreeinEngineering
Physics/MathematicsattheUniversityof SaskatchewaninCanadain1995,andhis MasterofScienceinNuclearPhysicsat theSaskatchewanAcceleratorLaboratoryin 1998withresearchonthenearthresholdphotoproductionof π-mesonsandchiralperturbationtheory.TerrycompletedhisPh.D.in HighEnergyParticlePhysicsatNDSUin 2002withdissertation“GaugeTorsionGravity,StringTheory,andAntisymmetricTensorInteractions.”HethenworkedasScientificEditoratHouseofKnowledgePublishingCompanyinLondonin2002,beforegoing totheJointInstituteforNuclearResearchin Russiain2003asaresearchassociate.Hewas aprofessoratNDSUfrom2004to2008and thenjoinedCrownbutteWindpower,Inc.,as itsChiefOperationsOfficeruntil2014when hereturnedtoteachatNDSU.In2015Terry joinedtheUniversityofMarytohelpstartthe newengineeringprogramandiscurrentlythe DirectoroftheEngineeringprogramatMary.
EricGarcia: EricearnedhisBachelorof SciencedegreeinCivilEngineeringfromCaliforniaStateUniversity,LongBeach,in2012, andhisPh.D.inArchitecturalEngineering (withemphasisonStructural)fromtheUniversityofNebraska,Lincoln,in2016with dissertation“IdentifyingtheOnset,Type,and LocationofDeteriorationinReinforcedConcreteUsingUltrasonicTesting.”Ericthen continuedhisresearchasapostdoctoralresearchassociateuntilhejoinedtheUniversity ofMaryasaCivilEngineeringprofessorin theFallof2017.
AnthonyWaldenmaier: Anthonyearned hisBachelorofSciencedegreeinCivilEngineeringfromNorthDakotaStateUniversityin2009andhisPh.D.(pendingdissertation)inCivilandEnvironmentalEngineering–TransportationMaterialsfromNDSU. AnthonyalsoearnedaGraduateCertificatein StatisticsfromNDSUin2012andhejoined UniversityofMaryEngineeringasaCivilEngineeringprofessorintheFallof2017.
NancyKelly: NancyearnedherBachelorsofSciencedegreeinElectricalEngineeringfromtheUniversityofRhodeIsland in1985,herMasterofScienceinElectricalEngineeringfromtheMassachusettsInstituteofTechnologyin1987withresearch ontheuseofacousticandsyntacticinformationforcontinuouslyspokenletterrecognition,andherPh.D.inElectricalEngineering fromtheMassachusettsInstituteofTechnologyin1994withdoctoraldissertationentitled“Acoustic-PhoneticandLinguisticAnalysesofSpontaneousSpeech:Implications forSpeechUnderstanding.”From1994until2000sheworkedwithVoiceProcessing CorporationwhichthenmergedwithVoice ControlSystemsandwaslateracquiredby PhilipsElectronics.From2000until2017 NancyworkedasaSpeechTechnologyconsultantandalsoaprivatetutorandthenjoined theUniversityofMaryasanElectricalEngineeringprofessorintheFallof2018.
RodrigodaCostaAparecido: Rodrigo
earnedhisBachelorofScienceinElectrical Engineeringwithanemphasisinelectronics in2009fromtheUniversityofSaoPauloin Brazil.Hefollowedthiswithsixyearsasa maintenanceengineerwithBaker-Hughesin Brazil.RodrigojoinedMaryEngineeringin 2017asourLaboratoryCoordinatorandinstructor.Rodrigoalsorecentlycompletedhis MBAfromtheUniversityofMaryin2018 andisnowalsoinchargeofpurchasingfor theEngineeringSchool.
Anthony(A.J.)Garcia: A.J.earnedhis BachelorofSciencedegreeinMechanicalEngineeringfromtheCaliforniaStateUniversityatLongBeachin2012,followedbyhis MasterofScienceinMechanicalEngineering fromtheGeorgiaInstituteofTechnologyin 2014.HegothisPh.D.inMechanicalEngineeringfromtheVirginiaPolytechnicInstitutein2018withdissertation“Millipede InspiredLocomotionforRumenMonitoring RemotelyOperatedVehicle.”A.J.joinedthe UniversityofMaryasaMechanicalEngineeringprofessorintheFallof2018.
James(Jim)Carrico: Jimearnedhis BachelorofSciencedegreeinMechanicalEngineeringattheUniversityofNevadainReno in2006,followedbyaMasterofArtsin CatholicStudiesfromtheUniversityofSaint ThomasinSaintPaul,MN,in2011.Jimthen gothisPh.D.inMechanicalEngineeringfrom theUniversityofUtahinSaltLakeCityin 2018withdissertation“3DPrinting,Design andMotionControlofIPMCswithApplicationsinSoftRobots.”JimjoinedtheUniversityofMaryasaMechanicalEngineering professorintheFallof2018.
JosephStuart: JosephStuartearnedhis undergraduatedegreeinHistoryfromFranciscanUniversityofSteubenvilleandhis Ph.D.fromtheUniversityofEdinburghwith dissertation“ChristopherDawsoninContext: AStudyinBritishIntellectualHistorybetweentheWorldWars.”JosephisaHistory professorattheUniversityofMaryandFellowinCatholicStudies.Josephalsohasa degreeinlandsurveyingfromFerrisState Universityandhasworkedinsurveyingin MichiganandinNorthDakota.Josephhas taughtourCivilEngineering Surveying course atMaryEngineeringsincetheFallof2017.
Charles(Wes)Dickhut: Wesearnedhis BachelorofSciencedegreeinGeologicalEngineeringfromtheColoradoSchoolofMines in1993andhisMasterofScienceinGeologicalEngineeringfromtheUniversityof Idahoin1999wherehisresearchfocused ontheincorporationofuncertaintyandspatialvariabilityintogeotechnicalengineering analysis.Wesisaprofessionalengineerin NorthDakota,SouthDakota,Montana,and Wyoming(formerlyalsolicensedinNew York,Ohio,Indiana,andKentucky)andhis workexperienceincludesKnightPiesoldand CoinDenver,Colorado,from1993to1994, theUSArmyCHPPM-EuropeinLandstuhl, Germany,from1994to1997,ATCAssociatesinCincinnati,Ohio,from1999to2001,
BBC&MEngineering,Inc.,Cincinnati,Ohio, aswellasCincinnatiStateCommunityCollegefrom2001to2005,JohnP.StopenEngineering,Syracuse,NewYorkfrom2005to 2013,andBraunIntertecCorporationinBismarckfrom2013topresent.Weshastaught our SoilScienceLab courseaswellasour EarthDynamicsandGeophysics coursehere atMaryEngineeringsincetheFallof2017.
DanielBarr: DanielearnedhisBachelor ofScienceinBiochemistryin2006fromBarretHonorsCollegefollowedbyhisPh.D.in ChemistryfromArizonaStateUniversityin 2011.DanielthenwenttoUticaCollegefrom 2011until2016asabiochemistryprofessor untiljoiningtheUniversityofMaryChemistrydepartmentin2016.InadditiontohisresponsibilitiesasChemistryprofessor,Daniel hasdesignedandtaughttheMechanicalEngineering Thermodynamics coursefortheMary EngineeringSchoolsincetheFallof2017.
BobWillenbring: BobearnedhisBachelorsdegreeinMathematicsfromSt.John’s UniversityinCollegeville,MN,in2005with dissertation“RNAsecondarystructure,permutations,andstatistics,”andhisPh.D.in MathematicsfromMichiganStateUniversity in2011.BobhasbeenattheUniversityof Marysince2011andiscurrentlytheChairof theMathematicsDepartment.Bobhastaken numerouscoursesincomputerprogramming, computeralgorithms,andcomputertheory,as wellasnumericalanalysis.Bobisfluentin computerlanguagessuchasC,C++,Java,Excel,Matlab,LATEX,etc.,andhasusedthis experiencetodesignourENR200 ComputingforMathematicsandEngineering course whichheteacheseveryFallsemester.
PatrickKelly: PatrickearnedisBachelorofSciencedegreeinPhysicsattheUniversityofWaterlooandbothhisMasterof ScienceandhisPh.D.inPhysicsattheUniversityofTorontospecializingintheoretical high-energy/particlephysicsandgravitation/cosmology.Patrickdidpostdoctoralstintsin Toronto,Winnipeg,andCambridge,MAbeforeacceptingafacultypositionattheNorth DakotaStateUniversity.Patrickthenjoined AveMariaCollegeinMichiganandthenAve MariaUniversityinFloridabeforejoiningthe UniversityofMaryin2017.Patrickteaches our EngineeringPhysics coursesandisalso designingupperyearPhysicsandEngineering coursesaswellasLaboratoriesandafuture Physicsminor.
ABRIEF HISTORYOF ENGINEERINGAT MARY ByTERRYPILLING
TheUniversityof MarySchoolofEngineeringwasconceived aspartofthe Vision 2030 planfortheuniversity.Vision2030 isacapitalcampaign thatwasannouncedin 2015anddefinesthree phasesofconstructionanddevelopmentover 15years.ThereadercanfindnumerousarticlesontheUniversityofMarywebsitethat outlinethemilestonesthathavealreadybeen
achievedandthenewconstructionthathas beencompletedsincethen.Thefinalpiece ofPhase1oftheVision2030planisthe constructionofaSchoolofEngineering.
IwashiredbytheUniversityofMaryin 2015tohelpwiththedesignanddevelopmentofthenewEngineeringSchool.One ofthefirstthingsIdidafterjoiningtheteam wastotakeatriptoGrandForkswithDr. DavidFleischacker,thedeanofthecollege ofArtsandSciences,Dr.JodiRoller,the deanoftheSchoolofHealthSciences,and Dr.DianeFladeland,theVicePresidentfor AcademicAffairs.Togetherwemetwiththe facultyfromtheUniversityofNorthDakota SchoolofEngineeringandsetupamemorandumofunderstanding.Thismeantthat ourengineeringstudentscouldtakecourses attheUniversityofMaryaswellascourses onlinefromUNDandtheywouldallcount towarddegreesfromboththeUniversityof MaryandtheUniversityofNorthDakota. Thisagreementallowedustodevelopour programfromthebeginning,addingcourses andfacultyasweconstructedourlaboratoriesandfacilities,whileallowingourstudents totakefromUNDthecourseswehadnot yetdeveloped.Withthisagreementinplace wehadourfirstgroupoffreshmanstarttheir Maryengineeringdegreesinthefallof2016. Wethenformeda‘CurriculumCommittee,’ whichconsistsofengineersfromcloseto40 differentengineeringcompanieswhichareactiveinNorthDakotaandthenearbystates. Theseengineershavehelpedusdesignour coursesandourteachingphilosophysothat weteachtheskillsnecessaryforourstudents tobeproductiveandvaluableemployeesfrom themomenttheygraduate,requiringfarless onthejobtrainingthanisnormallyrequired ofnewengineeringgraduates.Thecommitteealsohelpsourstudentstoremainindirect contactwiththeengineeringworldleadingto valuableinternshipopportunitiesandimportantengineeringcontactsfortheirfuturecareers.
Sincethen,wehavehiredseveralnewfacultyandconstructedmanynewcoursesand laboratorieswhilecontinuingtoraisemoney forthenewEngineeringbuilding,thedesign phaseofwhichisalmostcompleted,andconstructionisexpectedtobegininthespringof 2019.Weareaddingnewcoursesandconstructingnewlaboratorieseachsemesteras theneedarisesduetoourcurrentJuniorlevel studentsprogressingthroughtotheirdegrees. Whenthisfirstgroupofstudentsgraduatesin thespringof2020wewillbefinishedconstructingourbuilding,ourlaboratorieswillbe fullyequipped,andallofourcourseswillbe offeredeveryyearafterthat.
• WewereabletooperateanR/Ccarusinga raspberrypi.
• Webegantoreconstructanoldmotorcycle.
• Wevolunteeredat,andhelpedrun,alocal roboticscompetition.
• WehelpedteachtheOTstudentshowto makesimplebuttonsthattheycannow make,replacingtheexpensivebuttonsthat theyusedtohavetobuyasanadaptation forspecialneedschildren’stoys.
Thisyearweplantoexpandasaclub,since wehaveabiggerfreshmanclassofengineeringstudentscomingin.Weplantocontinue withthereconstructionofthemotorcycle,volunteeragainatrobotics,andanyotherideas thatwewillcomeupwithatourfirstmeeting. Wetrytomakesurewetrytodowhatthe memberswanttodo,sowearealwaysopen foranyideas.
ENGINEERING 101 ByNANCYKELLY
Overthispastsummer,theMaryEngineeringfacultymadeanumberofchangesto oneofoursignaturecourses,ENR101:IntroductiontoEngineering.Thisclassistypically takenbyfirst-semesterfreshmenEngineering orConstructionManagementmajorsandis designedtohelpthemdecidewhichbranchof EngineeringorConstructionManagementis therightoneforthem.
Thecoursenowincludesnotonlythe popular“EngineeringCareers”sessions,in whichindustryprofessionalsareinvitedto comeandspeaktotheclassandsharedetailsabouttheirpersonalworkexperiences, butalsooverviewsofvariousengineeringdisciplines,resumecreation,computer-aideddesign(CAD),spreadsheets,aswellasoral technicalpresentations.
Thusfar,studentsandspeakersalikehave beenenthusiasticaboutthecourse,whichis beingteam-taughtbytheentireEngineering faculty.TheinvolvementofallEngineering facultymembersisconsistentwiththepersonalapproachoftheMaryEngineeringprogram.ThisinvolvementpermitsENR101studentstogettoknowfaculty,andviceversa, rightaway.Studentsareencouragedtoseek outfacultyforadviceandmentoring.Some arealreadydoingso,whichwillsurelyhelp themmaketheirmajorandcareerdecisions withmoreconfidence.
THE ENGINEERING CLUB
ByCALEBWEISGARBER,ENGINEERING CLUBPRESIDENTLastspringsemesterwasthebeginning ofourUniversityofMaryEngineeringClub. Wekeepaconstantofabout12membersand membersareallowedtobeengineeringand nonengineeringmajors.Someofthefun thingswehavedoneinthepastare:
Eventhosestudentswholaterdecideto majorinsomethingotherthanengineering willstillfindtheirexperienceinENR101 avaluableonewheretheskillstheygain inspreadsheets,r´esum´es,CAD,andpublic speaking,aresuretocomeinhandyinany careertheyhappentochoose.
ThelineupofinvitedspeakersfortheFall, 2018,sessionoftheENR101courseareas follows:
September17: ScottSchuh,DirectorofEngineeringStrategyatBobcat/Doosan.
September19: KevinAllen,DirectorofCareerServicesatUniversityofMary.
October08: TomAtkinson,WesternArea PowerAssociation.
October10: ClydeEisenbeis,ElectricalEngineerfrom3MandtheNavy.
November28: TomNeigum,DirectorofAviationServices,KLJEngineering.
December03: EvanAnderson,MadScientist,Gizmonics.
GAGA BALL PIT
ByANTHONYWALDENMAIEREveryyearthestudentsattheUniversity ofMaryhavea DayofService wherethey gooutintothesurroundingcommunityand
• Thegamebeginswhentherefereethrows theballintothecenterofthepit.
• Whentheballentersthepit,theplayers scream‘GA’forthefirsttwobounces,and ‘GO’onthethirdbounce,afterwhichthe ballislive.
• Oncetheballislive,anyplayercanhitthe ballwithanopenorclosedhand.
• Ifaballtouchesaplayerbelowtheknee (eveniftheplayerhitshimselforherself)he orsheisoutandleavesthepit.Ifaplayer ishitabovetheknees,theplaycontinues.
• Ifaballiscaughtonafly,theplayerwho hittheballisout.
• Usingthewallsoftheoctagontoaidin jumpingislegalaslongastheplayerdoes notpermanentlysitontheledgeoftheoctagon.
• Playerscannotholdtheball.
• Ifneeded,asecondballcanbethrowninthe pittoexpeditetheendofthegame.Thelast playerstandingisthewinnerofthatround.
Helpfulelementaryschoolkids
spendthedayservingthepeopleandbusinesses.TheDayofServiceisastudentdriven initiativeanditisintendedtopromotecommunityandfosterleadership.Itinvolvesover 1,300volunteersandtheactivitiesrangefrom everythingtorakingleavesandcleaningup garbagetoorganizingclothingandfooddonations.
Thisyear,theengineeringstudentsand facultyspentthedayofserviceconstructinga GaGaBallPitattheAppleCreekElementary
ELECTRICAL ENGINEERING
Therearecurrently19studentsenrolled inElectricalEngineeringofwhicheightare Juniors,threeareSophomores,andeightare freshman.WehavethreefacultyteachingEE coursesandthereisasearchinprogressto hiretwomoretostartinthefallof2019. Overthepastsummerweconstructedseveral newlaboratoryspacesforelectricalengineeringandwepurchasedquiteabitofequipment forthefall2018andspring2019courses.We haveacomputerlabwithcloseto30workstationsrunningArchLinuxandwithvarioussoftwarepackagesinstalledsuchasSpice, FreeCAD,Octave(MatLab),QGIS,QUCS circuitsimulator,VIM,LATEX,andcompilers foramultitudeofcomputerprogramminglanguages,amongmanyotherthings.Wealso have6electronicsstationswhichincludeTek-
totry(theanswersareattheback)fromtheir sophomoreCircuitscourse.
Prof.Waldenmaiersettingthefirstpost SchoolnearBismarck.OnthemorningofOctober10thwegotpost-holediggers,sandbags, andothertoolsandthenpurchasedthe 4 × 4’s, 1 × 6’s,andothermaterialsfromthelumber yard.Wethenwenttotheelementaryschool andconstructedtheoctagonalGaGaBallPit.
Gagaballisagamewhereeveryonegoes intothearenawithasingleball.Iftheball touchesyoubelowthekneeyouareoutand
ElectronicsStations
Findthevoltages
Thefirstisaresistornetworkwithvarious sourcesandtheobjectistofindthevoltages V0, V∆,and Vc thevoltageatnode c.ThesecondisanoperationalamplifierwithaTfeedbacknetworkandthegoalistofindanexpressionfortheoutputvoltageintermsofthe inputvoltageandtheresistors.
Findanexpressionfor Vo
TheproblemwepresentbelowisProblem 1fromMidtermExam3oftheirsophomore levelCircuitsIIcourse.Thesearetypicalof thetypeofproblemtheyareexpectedtosolve onanexam.Forthesecondproblem,please takenoteoftheexaminstructions!Thecorrectanswerisonlyworthpartialpoints–engineeringstudentsneedtoexplainindetailhow togettheanswer.Theyneedtowriteitasa setofstep-by-stepinstructionstothereaderin ordertogetfullpoints:
LinearElectricCircuits
MidtermExam03
• Youhave2.5hourstocompletethisexam.
• ThisexamisCLOSEDBOOKand CLOSEDNOTES.Yourtoolsareblank paper,apen,andyourbrain.
• YoumayNOTuseacalculatoronthis exam.Reduceyouranswerstothelowest fractionalform.
GaGaBallPit
mustleavethepitandthelastoneinthepit wins.Herearethe‘semi-officialrules’:
• Allplayersstartwithonehandtouchinga wallofthepit.
tronixoscilloscopes,arbitrarywaveformgenerators,3-channelpowersupplies,benchtop digitalmultimeters,computers,andallkinds ofbreadboardingtoolsandsolderingequipment.Thesestationswillallowourelectrical engineeringstudentstobuildcircuits,analyze circuits,andstudydatasheetswhilesolving electricalengineeringproblemsanddesigningprojects.TheElectricalEngineeringdepartmentwillcontinuetoacquirenewequipmenteachsemestertoequipnewlaboratories asnewcoursesareaddedtothescheduleeach semester.
Foryouelectricalengineersoutthere,we giveafewexampleproblemsyoumightlike
• Yourworkshouldbedoneonanengineeringpad.
• Handinaneatversionofyouranswersand notroughwork.
• Inordertogetfullpointsyouneedtoorganizeallofyourstepssothatsomeonecan easilyfollowthelogic.Usewordswhen necessarytoclarifywhatyouaredoing.
Problem1: ForthecircuitshowninFigure 1,theswitchhasbeeninposition a foralong timeandthen,at t =0 theswitchmovesinstantaneouslytoposition b.Find V0(t) for t ≥ 0
Stepsyouneedtoshowforfullpoints:
• Reducetheentirecircuitintoanequivalent RLCcircuit.
• Findthedifferentialequation
• Solvethecharacteristicequation
• Decidewhetheritisunderdamped,overdamped,orcriticallydamped.
• Solvethedifferentialequation.
• Writethesolutioninassimpleformaspossiblefunctionof t withnounknownconstants.
• Sketchthesolution(sothatifIGnuplotitI willgetthesamethingasyoursketch).
TofinishthissectiononElectricalEngineeringhereissomecodethatthestudentswrotetographtheCommonModeRejectionRatio(CMRR)fortheTexasInstruments µA741operationalamplifierandcomparewiththeonegiven1 onpage9ofthe datasheet.
SpiceCodeforUA741CMMR
* CMMRofTIuA741model
.includeuA741.mod
VS10AC1
Vcc5015V
Vee0615V
XOP123564UA741
R1131k R23410k R3121k R42010k
XOP207568UA741
R5171k R67810k
.control acdec1512Meg
gnuplotdata20* log10(v(8)/v(4) ) .endc
.end
Therearecurrently25studentsenrolledin MechanicalEngineeringofwhich5areJuniors,6areSophomores,and14arefreshman.Thereare2fulltimefacultymembers teachingmechanicalengineeringcoursesand wearecurrentlysearchingfor2moretobegin inthefallof2019.
Duringthispastsummerwepurchased equipmentforourmechanicalengineering machineshop.Wenowhaveaverticalmill,
sheetmetalbrake,four3-Dprinters,alathe, chopsaw,CNCmachine,aswellasanumberofotherinstrumentsandtools.TheMechanicalEngineeringdepartmentwillcontinuetoacquirenewequipmenteachsemester toequipnewlaboratoriesasnewcoursesare addedtothescheduleeachsemester.
HereareafewproblemsthatourMechanicalEngineeringstudentsarerequiredtosolve intheirvariouscoursesthatyoumightalso liketotry.
DynamicsProblem: Largefreighttrains accelerateveryslowly.Supposeonesuch trainacceleratesfromrest,givingits0.350mradiuswheelsanangularaccelerationof 0.250rad/s2.Afterthewheelshavemade200 revolutions(assumenoslippage):(a)Howfar hasthetrainmoveddownthetrack?(b)What arethefinalangularvelocityofthewheelsand thelinearvelocityofthetrain?
StaticsProblem: Determinetheforcesin membersAB,BD,andCDofthetrussshown
ofBraunIntertec.Topicsofthiscoursecenteraroundmechanicalsoiltestingandanover viewofothercivilengineeringmaterials;includingconcrete,asphalt,andothers.
Overthecourseofthesummer,faculty havelookedtofutureneedsoftheCivilEngineeringProgramandhavepurchasedtwoUniversalTestingMachines.Thesetwotesters allowforstressorstrain-controlledtestingof variousmaterialswithfineprecision.Inthe shortterm,thefacultywillutilizethesemachinesinavarietyofcourses;includingMechanicsofMaterials,StructuralMechanics, SteelDesign,andReinforcedConcreteDesign.Uponcompletionoftherenovatedbuilding,thefacultywillhaveafullyfunctioningSoilslab,Concretelab,Civilmaterials testingarea.Facultyarecurrentlyreviewingspaceneedsandequipmentneedstofully equipeachspaceasnewcoursesareaddedto thescheduleeachsemester.
ECI351-StructuralMechanics Exam1-Problem2
TrussBridge
inthefigure.AlsosolvefortheforceonmembersFH,DF,andDG.
ThermodynamicsProblem: Whena fridgestandsinaroomat 20oC,themotor
Foryoucivilengineersoutthere,thefollowingisasampleproblemtakenfromExam 1intheirStructuralMechanicscoursethat youmightliketotryandsolve(theanswers canbefoundatthebackofthisnewsletter).
ThestructureislocatedinChicago(elevationlessthan1000ft)inanopenflatterrain.
hastoextract500Wofheatfromtheinside, at 4oC,tocompensateforlessthanperfectinsulation.Howmuchpowermustbesupplied tothemotorifitsefficiencyis80%ofthe maximumachievable?
CIVIL ENGINEERING
Therearecurrently29studentsenrolledin CivilEngineeringofwhich13areJuniors,10 areSophomores,and6arefreshman.There are2fulltimefacultyand2adjunctfaculty teachingcivilengineeringcoursesandweare searchingfor1moretobegininthefallof 2019.
Currently,wedon’thaveapermanent buildingforourcivilengineeringlaboratoriesandsowearefortunatetohaveBraun Intertec,alocalengineeringcompany,hostingourCivilEngineeringLab1course.The courseistaughtbyBraunIntertecengineer WesDickhutandiscarriedoutinthemodern laboratoryfacilitiesintheBismarcklocation
,and thatthestructureisrigid(G =0 85),fullyen-
TopView
closed(GCpi = ±0 18),andisusedforheavy storage(V =105mph). Determineandsketchtheforcesonthe:
(a) windwardwall[6points].
(b) leewardwall[2points].
(c) roof,witha 20o slope, Cp(windwardroof) = 0 514 and Cp(leewardroof) = 0 6 [4points].
CONSTRUCTION ENGINEERINGAND MANAGEMENT
Therearecurrentlysixstudentsenrolled inConstructionEngineeringandManagement ofwhichnoneareJuniors,threeareSophomores,andthreearefreshmen.Wearecurrentlyinthemidstofafacultysearchfora suitablecandidatetohelpdesignandteach ourconstructionmanagementcourses.What wearelookingforis,ideally,someonewho hasaPh.D.inConstructionManagementor somecloselyrelatedfield,experienceinindustryasaconstructionmanager,aswellas experienceindesigningengineeringcourses anddegrees.Thereaderwillhavetowaituntilthenextissueofthisnewslettertofindout whetherornotwearesuccessful.
CHEMICAL,PETROLEUM, AND UNDECIDED
Thereareasmallnumberofstudents whoareenrolledinChemicalEngineering andPetroleumEngineeringviaouragreement withUND.Thismeansthattheywilltake theirfirsttwoyearsofcoursesattheUniversityofMaryandthentheywillfinishtheirdegreebytakingonlinecoursesfromUND.
Atthemoment11ofourfreshmenstudentsarestillundecidedastowhichtypeof engineeringtheywillbemajoringin.Thisis verynormal.Infact,itisraretofindafreshmanstudentwhofullyunderstandswhateach kindofengineeringisallabout.Thisiswhy wehavedesignedourENR101courseina waythatwillhelpthemmakethatdecision. SeethearticleinthisnewsletterbyDr.Nancy Kellyformoredetailsaboutthiscourse.
SUMMER PROJECTSAND INTERNSHIPS
AlmostallofourSophomoreengineering studentshadinternshipsandhavereturnedto starttheirjunioryearthisfallwithmanygreat storiesofthefunandinterestingthingsthey didworkingoverthesummer.Hereisasamplingofthem:
MichaelGorder isaSeniorCivilEngineeringstudentwhocompletedhissecond internshipthissummer attheCityofMandan supervisedbyJusting Froseth,CityofMandanEngineer.Michael didmanythingsduring histimethereincludingsurveying,inspect- Michael ingprojects,readingbidproposals.
Heworkedonthetemporaryroundabouts projectinMandan,alotofarcGISworkincludingmakingamapofallthecrashesinND
involvedalotofprojectmanagement,going tothesiteanddecidingonhowmuchpiping wewouldneed,wherewewantedtoinstall it,etc.”Baileydiscussedhowheattended weeklymeetingswithallkindsofengineers fromdifferentfirmsfortheconstructionof anhospital.Theywouldgooverthedifferent designs(inRevit)indetailwitheveryoneto completethedetailsofthedesign.Heuseda lotofmaterialfromhisEME341Thermodynamicscourseaswellascontrolsystemsin programmingACandboilersystems.Overall hehadagreatsummer,metalotofengineers inthevariouscompanies,andmadereally goodmoney.Heplansondoinganotherinternshipwiththemnextsummeraswell.The companymentionedtoBaileythattheywere impressedwithhiscommunicationskills,his CADexperience,andhisabilitytopresent ideaswhencomparedwithpeopletheyhave hadfromotherengineeringschools.Theyreallylikedthesmallclasssizesandhands-on, project-based,courseswehaveatMaryEngineeringandwilldefinitelylookformoreof ourstudentsinthefuture.
NorthDakotaCrashData
withdetailreportsforeachinthelastseven years,alsomadeapublicmapfortheMandan cemeterythatthepubliccanusetofindtheir lovedonesonlineinaGISprogram.
IdaNarbuvoll isaJuniorCivilEngineeringstudentwhospenteightweeksofthe summerinaninternshipattheNorwegian engineeringcompany NorconsultunderlocalmanagerDagMeli. Shespentmuchofher timemodelingbuildingsinRevitandAuto- Ida CADanddoingenergycalculationsforapartmentcomplexesanddimensioningofbeams andcolumns.Hermainprojectsweredesigningawastedisposalstation,afewapartments, andanautorepairgarage.
BaileyMeyer isaJuniorMechanicalEngineeringstudentwhoworkedatamechanicalcompany(HVAC, heatingandcooling, plumbing,etc.)inSheboigan,Wisconsin,underthepresidentDave Aldag.Indescribing hisdailydutiesBailey said,“Iwouldlookat blueprintsandmake correctionstowhat Bailey wasbeingbuild,basicallyalteringthedesign ofwhatwasoriginallyplanned.Ialsodidalot ofheatingandcoolingloadcalculations,for exampletogetthecorrectBTU’sforthevariousrooms.Ibidondifferentprojectswhich
NoahKrebs isaJuniorCivilEngineering studentwhoworkedfortheUSGSDakota WaterScienceCenterundertheStudies ChiefJoelGalloway. Duringhissummer Noahhelpedwithdata collectioninthefield forinvestigationsof waterqualityonsurfacewaterandground- Noah waterwells.Healsoworkedwithsurveying forthepurposeofequipmentsetupandrunninglevelsfordifferentgagehouses2 across thestate.IntheofficeNoahhelpedwith regressionanalysistechniquesfordifferent projectsandworkedwithexcelonnumerous projectsaswell.Hewasalsoinvolvedinan ArcGISprojecthelpingmaketheshapefileof anerosionanalysisonthelowerbruleregion. Overallhehadafunandinterestinginternship withtheUnitedStatesGeologicalSurvey.
AustinKonschak isaJuniorCivilEngineeringstudentwhoworkedforNorthern Technologies(NTI) outofBismarckthis summerundersupervisorTylerHall. Austin’sdutiesover thesummerconsisted oflabworkanddrivingtojobsitestoperformplasticitytestson Austin concreteornucleardensitygaugetestson compactedfill.
PhillipSpringsteen isaJuniorElectricalEngineeringstudentwhoworkedfor PathfinderInspections andFieldServicesin Dickinson,ND,this summer.Hisjobwas tobuildandanalyze verylargeexceldata sheetsandinvoices, conductmeasurements usingGoogleearth, makeandusefield Phillip maps,andrepairequipmentandtools.He
wasabletousehisprogrammingskillstofind waystosavethecompanymoneybyisolating thesourcesforvariousissuesthatshowupin pipelinemaintenanceusingdataanalysis.
CalebWeisgarber isaJuniorCivilEngineeringstudentwhodidasummerinternship underKenOlheiserat NationalInformation SolutionsCooperative (NISC).Calebwas partofthesysadmin groupwhodealtwith customererrorreports. Hisworkinvolveda Caleb lotofcodinginbashshellscriptworkingon theoldreportsthattheyhadnothadthetime todo.Calebwasabletocompletethoseold errorreportsbyfixingsmallerrorsthathewas taskedwithfindingintheoldcodingthatwas used.
AlexanderDavis isaJuniorCivilEngineeringstudentwhoworkedatBraunIntertec inBismarckthissummer. Heperformeddensitytests, concretetests,andrebarinspectionsinthefield.He alsoranproctors,gradations,andconcretebreaks inthelab.Alexsays,“It wasgreatexperienceand probablythebestjobIhave everhad.Ireallyenjoyed Alex theresponsibilitiesandtrustinthatcompany whereeveryoneworkstogether.Itwaswell worthmytimeandifthatwasn’tenough,it waswellworthmypiggybank.”
JaradZittleman isaJuniorMechanical Engineeringstudentwhodidplumbingand HVACworkforDirk PlumbingandHeatinginMandan,ND. ThiswasJarad’sthird summerworkingwith themandhewasgiven alotofresponsibilitythissummer.He laidouttheentireduct Jarad workofanewhousebasedofftheCADdrawing.Hedidgaspiping,basicplumbingduties,andcleaned/maintainedairconditioners. Jaradsays,“Ihadanabsoluteblastwiththese guysandamsohappyIdidit.Seeingthisside oftheconstructionindustrywasanamazing experienceandIwillusetheseskillsforthe restofmylifebothinbasicknowledgeand theengineeringindustry.”
LeviClagett isaJuniorCivilEngineeringstudentwhoworkedfortheCityofBismarckthissummerunderClearyJohs.He didsurveying,inspecting,aswellasgrunt work.Levisays,“One ofmyfirstresponsibilitiesherewassurveying,whichwasnice Levi becauseIhadalreadylearnedalotofitfrom classalready.Surveyingisalwaysagreat experiencebecauseyougettoseewhata projectlookslikebeforeitevengetsstarted. BesidessurveyingthoughIwouldmainlyact asaninspector,Iwouldreadourspecsbook andlearnalltherulesthatthecontractors needtofollowwhileworkingonourstreets
andsidewalks.FromthereIwouldgoout intothefield,markupiftherewasbroken concretewithinacertainprojectarea,anda shortwhilelateraconcretecrewwouldbe replacingorrepairingthatconcreteandIwas responsibleforinspectingtheirwork.With variousprojectscamevariousdegreesofresponsibilities,sometimesIwouldbeableto calculateandtotalcostsforthecontractorand othertimesIwassupposedtojustwatchand learn,whichwasalwaysveryinterestingand probablythemosteffectivewayoflearning becausesomuchisalwaysgoingon.This processwasveryusefulbecauseittaughtme howtotakeandrecordprecisedataandmeasurements,andhowtoinspectconcreteand itsbaseforquality.Ilearnedatonabout theslumpofconcreteandtheimportanceof qualitycompacteddirtunderneath.LastlyI didallsortsofgruntworklikewatchinga chip-sealingcrewtarandrockroadsallday, orwalkinglongstretchesofroadsmeasuring thelengthsofthecracks,findingdangerous orpoorfunctioningsidewalk,etc.Icouldgo onforever,IthinkIexperiencedjustabouteverysingleaspectofthelifeofacityengineer thissummer.Itwasanincredibleexperience thattaughtmewaymoreaboutengineering thanIhadeverexpected.Throughoutthe schoolyearI’llcontinuetohelporganizeand inspecttheworkofthecontractors,andwhen allthatshutsdownI’llprobablybesurveying ordoinggeneralofficework.”
NoahKraft isaJuniorElectricalEngineeringstudentwhoworkedforKilldeer MountainManufacturinginDickinson, ND,thissummeron theiraerospacecontracts.Hespenthis timeworkingwithexcelspreadsheetsand computerprogrammingwherehehad Noah tooptimizeaspectsofthecableandwiring assemblyprocessandreallyimpressedhis employer.TheMaryEngineeringSchoolhas sincebeencontactedbyKMMtoaskforanotherparttimeemployeeduringtheschool yearandsixmoreinternsfornextsummer!
AaronBales isaJuniorElectricalEngineeringstudentwhoworkedatBismarck ParksandRecreationoverthesummer.Aaron’sduties includedgeneralmaintenanceofsportscomplexes,gettingthe fieldsreadyfortournaments(suchasMcQuade’s,whichisthe largestcharitysoftball Aaron tournamentintheworld),fixingequipment, etc.Aaronsaid,“Ihadagreatsummerand madelotsofmoney.Irelaxedandwentcampingandfishing.However,nextsummerIplan toworkatMDU’sHeskettPowerStationand finallydosomerealElectricalEngineering! (inadditiontofishingandcamping)!”
RichardBendish isaJuniorElectrical EngineeringstudentwhoworkedatPrairie
EngineeringundersupervisorJeremyButman.HisdutiesincludedbuildingautoCADandRevitmodels tobeusedbycontractors,performingcalculationstoensurethe propermaterialand Richard wiringisusedanddemandedofthecontractors.Helearnedmanyskillsincluding autoCADandRevitandhowprivatesector engineeringworksandoperates,howthebidingprocessforjobsworks,andotherbasic engineeringduties.Richardsaid,“Ithoroughlyenjoyedmyinternshipandmytimeat PrairieEngineeringthissummer.Itwasafun andinterestingenvironmentallsummer.”
AustenDubriel isaJuniorElectricalEngineeringstudentwhoworkedfortheFresno Grizzlies,thetriple-A affiliateteamforthe HoustonAstrosmajor leaguebaseballorganization.Hisduties includedaudiosystemsinthestadium andplayingthevariousmusicwhichis Austen associatedtoeachoftheindividualplayers. Austinsaid,“itwasanawesomeexperience tonotonlymeettheplayersbutalsotohave themdependonmetokeeptheaudiosystemsworking.ItfeltlikeaVIPupinthe soundboothatthestadium,anditwasfunto playaroundwiththestadiumaudiosystems betweengames.”
IsaacSaad isaJuniorCivilEngineering studentwhoworkedforBio-medicalForensicsinSanFrancisco, California.Isaacsays, “Idon’tknowhow muchIcansayabout theprojectbecauseI hadtosignanondisclosureagreement,but itwasbasicallydoing physicsandresearch Isaac forcourtcasestoproveifthestorywastrue. Iloveditandwoulddefinitelybeinterestedin morejobslikethat.”
EvanAnderson isaJuniorElectricalEngineeringstudentwhoworkedatAbbVieInc. asaprojectsupport engineer.Heworked withaseniorengineeringonaproject whichusedaprospectivemachinethatwas intendedtogoonthe productionline.He Evan usedultrasonicwavestotestforcracksand fracturesinthesyringesandanalyzedthedata foraccuracy.Evanalsosatinonvendorconsultationsandvariousotherwork.Evansaid, “IhadagreatexperienceworkingwithAbbVie,gainingknowledgeandworkingwitha teamonaprojectwhichcouldgreatlybenefit thecompany.”
RebekkahKeller isaJuniorMechanical EngineeringstudentwhoworkedwithJohn’s
Landscapewhereshe helpeddesignbeautifuldesertlandscapes outofAppleValley, California.Herduties includedwouldlaying rock,buildingfences, plantingtreesordesert plants,painting,and Rebekkah fixing/installingirrigation.Theirrigation pipingwasinstalledundergroundandshe assembledthewiringandprogrammedthe sprinklersystemsforhouseswithsprinklers ordrip-lines.Rebekkahstatedthatshe“had tounderstandthepressurerunningthrough thepipestoreachallpartsoftheyard,and,to dothat,thepipesneededtobethecorrectsize withaspecificnumberofexitpoints.More so,thevalvesneededtobeinworkingorder sothattheinformationbeingsentthrough thecomputersystemofthecontrolboxcould properlyturnontheirrigationlines.That bringsuptheapplicationofthewiringand electricalwork.Withthesprinklersystems anddrip-lines,wehadtoprogramtheirrigationcontrolboxandtimer.Insomecases,if thecontrolboxwasinneedofupdatingor repair,wewouldopentheboxandalterthe wiringinside,thusallowingthemostefficient flowofwatertobeusedfortheyard.”
“Inconclusion,thissummer’sjobwasn’tthe mostideal‘engineering’job,buttheconcepts andworkingmindsetcanallbeappliedtoa futurejobthatismoreorientedtowardsengineering.Whethermyjobwouldbemore mechanicalorcivil,alltheknowledgecan potentiallybuildoffeachother.Iwouldsay thatitwasworthit.”
istofillagridwithdigits––1through4fora 4 × 4 grid,1through5fora 5 × 5,1through 6fora 6 × 6,etc.––sothatnodigitappearsmorethanonceinanyroworanycolumn.Thegridsaredividedintoheavilyoutlinedgroupsofcells––oftencalled‘cages’ ––andthenumbersinthecellsofeachcage mustproduceacertain‘target’numberwhen combinedusingaspecifiedmathematicaloperation.Forexample,alinearthree-cellcage specifyingadditionandatargetnumberof6 ina 4×4 puzzlemustbesatisfiedwiththedigits1,2,and3.Digitsmayberepeatedwithin acage,aslongastheyarenotinthesame roworcolumn.Nooperationisrelevantfor asingle-cellcage:placingthe‘target’inthe cellistheonlypossibility(thusbeingafree space).Thetargetnumberandoperationappearintheupperleft-handcornerofthecage.
THE COLLATZ PROBLEM ByTERRYPILLINGOneoftheproblemsthatsophomorestudentshadtostudyintheir Computational Methods (ENR210)courseiscalledtheCollatzProblem.Thisisanunsolvedmathproblemandhasbeenunsolvedforaverylong time.Infact,thereisfameandevenoffersof largeamountsofmoneyforanyonewhocan managetosolveit!
TheCollatzConjecture(whichisunproven) isthatifyoukeepperformingtheaboveoperations,youwilleventuallyreachthenumber 1.Hereisanexamplesoyoucanseehowthe procedureworks:
a0 =13
a1 =3 13+1=40 byrule3
a2 =1/2 40=20 byrule2
a3 =1/2 20=10 byrule2
a4 =1/2 10=5 byrule2
a5 =3 5+1=16 byrule3
a6 =1/2 16=8 byrule2
a7 =1/2 8=4 byrule2
a8 =1/2 4=2 byrule2
a9 =1/2 2=1 byrule2
andsinceyouhavenowreachedthenumber 1youstop3.Ifyoueverfindastartingnumberthatdid not eventuallygobackto1then youwillhavedisprovedtheCollatzconjecture andyouwillwintheprize.Alternatively,you could prove thatallpossiblestartingnumbers doindeedendin1youwillalsowintheprize. Proveit,ordisproveit,eitherwayyouwin.
Thestudentsbeginbywritingasimple computerprogramintheCprogramminglanguage:
collatz.c
#include < stdio.h>
#include < stdlib.h>
int main( int argc, char ** argv) { int a;
if (argc!=2) { printf(”Usage:%snumber”, * argv); return 1;
Engineerslovepuzzles.So,forfun,in thissectionwepresentarandomsampling ofpuzzlesaswellassomemoreinvolved projectsthatourengineeringstudentshave hadtosolveintheirvarioussophomorelevel courses.Theseareintendedtobefunthings thatthereadermaywanttosolve,playwith, andevenexplorefurtherthemselves.
Thereasonthestudentslookedatisaspart ofoneoftheirweeklyassignmentswassimplytotesttheirabilitytotakeaproblemand figureouthowtostudyitwithacomputer. I.e.towritecomputerprograms,analyzedata, andstudygraphs,inanattempttounderstand theproblembetterandperhapsevensolveit. Thisisthetypeofthingthatisfrequentlydone inallbranchesofengineering.Ofcourse,it usuallyisn’tunsolvedmathproblemsthatare studiedinanengineeringcompany,butthe techniquesandmentalprocessesinvolvedare actuallysimilarinanydataanalysisormathematicalmodelingproblem.Itisausefulskill tobeabletoquicklyturnaproblemintoa mathematicalmodel,oracollectionofdata, andthentostudyitusingcomputerprograms. HereistheCollatzProblemalgorithm:
1. Pickanyintegerbiggerthanzero.
KenKenandKenDokuareastyleof arithmeticlogicpuzzleinventedin2004by JapanesemathteacherTetsuyaMiyamoto. KenKenderivesfromtheJapanesewordfor cleverness.AsinSudoku,thegoalofeach puzzle
2. Ifthenumberiseven,divideitby2.
3. Ifthenumberisodd,multiplyby3andthen add1.
4. Thendothesamethingwiththeresult.
} a=atoi(argv[1]); while (1) { printf(”%d”,a); if (a==1) break ; if (!(a%2))a=a/2; else a=3* a+1; } printf(” \ n”); return 0; }
Theprogramtakesanumberasaninput andthenoutputstheentiresequencethatyou getbyperformingtheCollatzalgorithmuntilitreachesthenumber1.Thissavesthem thetimeofcalculatingitbyhandanditalso enablesthemtogeneratealargecollection ofdata–namelytheCollatzsequencesfora bunchofnumbers.Theycanthenanalyzethis dataanywaytheyliketotryandfindpatterns andbetterunderstandtheproblem.
Hereisaproblemforthereader: The length,(or StoppingTime)isdefinedasthe numberofiterationsofthealgorithmittakes untilyoureachthenumber1.Forexample,if westartwiththenumber13aswedidabove,
thelengthwouldbe9sinceittookus9iterationstogettothenumber1.Youmightenjoy seeingifyoucanproducethisinterestingpatternthatthestudentsfound.Nobodyknows whythepatternshowsup.LikeIsaid,itis unsolved4 sothereisnottoomuchknown.
35014b467fff0c105ft=19312
oTheabovesaysthatthetemperature ofthesensoris19.312degreesC
3)WRITECONTROLCODE
onextyouwritebashscriptsto controlthedevice,takereadings fromthedevice,executethe analysiscode,andautomatically uploadtheresultstoyourgoogle drivecloudaccount. oyoumightwanttoattacharedand ablueLEDtotheGPIOpinsanduse thecommands"gpio-gmode18out" andalso"gpiowrite181"and "gpiowrite180"tocontrolanLED fromBCMpin18,turningitonwhen thetemperaturecrossesacertain thresholdandthenturningitoff againwhenthetemperaturecrosses back. Thisexemplifiescontrol/feedback.
4)WRITEANALYSISCODE
onextyouwritevariousfiltering andanalysiscodeinCwhichyou cancallfromyourbashcontrol scriptwhichwillfilterandformat thedatatoextracttheinformation thatyouareinterestedin.
IntheirComputerAidedMeasurement andControlscourse,thestudentswererequiredtoconstructadatacollectionapparatususingaraspberrypicomputerandthen useittocollectdataonsomethingtheywere interestedininvestigating,analyzethedata, andthenwriteascientificreportonwhatthey found.
Herearetheverbatiminstructionsasthey weregiventothestudents:
Herearetheinstructionsforusing theDS18B20digitaltemperaturesensor withyourRaspberryPi.
1)BUILDTHECIRCUIT
Firsthookupthecircuit.Youcanuse abreadboard,oryoucanjusthookall thewirestogether,oryoucouldbuild alittleself-containedpackagewith thetemperaturesensorinitandthree wirescomingoutwhichwouldpluginto theGPIO(thetwolinesofpins)onthe RaspberryPi.
CIRCUITDIAGRAM
WhereR1=4.7kohms GPIO4=Pin7 GPIO3.3V=Pin1
GND=Pin39
2)SETUPTHEPI
osudovi/boot/config.txt
-ifthereisalineinthefile thatsays:dtoverlay=wt-gpio thenyouarefine,otherwiseadd thatlinetothebottomofthe fileandreboot. oplugthetemperaturesensorintothe pinsoftheRaspberryPiasshownin thecircuitdiagramabove. osudomodprobew1-gpio osudomodprobew1-therm ogoto/sys/bus/w1/devices otherewillbeadirectoryinthere startingwith28-<number>where <number>issomeseriesofnumbers. ocdintothatdirectory. onowtype:catw1_slave youwillgettwolinesofoutput. Thereareabunchofnumbersbut ifthefirstlineendsinYESthen yourtemperaturereadingworkedand thesecondlinewillendin t=<5-digitnumber>andthat5-digit numberisthetemperature. oEXAMPLEhereismyoutput: 35014b467fff0c105f:crc=5fYES
5)PLOTTHEDATA
oaddlinestoyourbashcontrolscript sothatitwillautomaticallyproduce aGnuplotscriptwithpropertitles andaxislabelsandwillthenrun Gnuplotonthescriptandoutputboth adumbterminalgraphandalsoapng fileofthegraph.
6)WRITEASCIENTIFICPAPER
owriteascientificpaperinLaTeX whichexplainseverythingyoudid, includingthesetupoftheRaspberry Pi,thecircuitdiagram,theexplicit codethatyouwrote,andthegraphical resultsaswellasadiscussionof thoseresultsandaconclusion.
SolutionstoProblems
Herewegivethesolutionstothevarious problemsgivenabovefromeachoftheengineeringmajors.Inmostcasesweonlygive thestraightupnumericalanswer.However, aswehavementionedpreviously,intheactualengineeringcoursesthestudentsarerequiredtogivetheentirestep-by-stepsolution alongwiththelogicalreasoninginvolved.In fact,inmostassignments,thenumericalsolutionsaregiveninthequestion!Pointsareonly awardedforthethelogicalreasoningandno pointsareawardedforonlygivingthenumericalanswer.Ourphilosophyisthatonedoesn’t reallyunderstandsomethinguntilyoucanexplainitclearlytoothers.
ElectricalEngineeringSolutions
• Thesolutiontothevoltagesproblemis:
andthegraphofthestepresponseover timeisshowninthefigurewhereonecansee thatitisanunderdampedsystem
MechanicalEngineeringSolutions
• Thesolutiontothemechanicalengineeringtrainproblem:(a) θ =1257rad ⇒ x = 440m,and(b) ω =25 1rad/s ⇒ v =8 77m/s.
• Thesolutiontothemechanicalengineeringtrussbridgeproblem:AB=84.85kN compression,BD=63.24kNcompression, CD=12.5kNcompression,FH=127.28kN compression,DF=94.87kNcompression, DG=37.5kNtension.
• Thesolutiontothemechanicalengineeringfridgeproblem:Themaximumefficiency comesfromusingaCarnot(reversible)fridge, forwhich QH /QC = TH /TC .Here QC is known,andso
where W , QH and QC refertoenergytransfer persecond,measuredinWatts.With TH = 293Kand TC =277K, QC =500Wgives Wmax =29W.Howevertherealfridgeworks atonly80%ofthemaximumefficiency,so W =29/0 8=36W
CivilEngineeringSolutions
• ThesolutiontotheCivilEngineering
examproblemis:
(a) p0 15 =21 2 or 11 4 psf, p20 =22 2 or 12 4 psf, p24 =22 8 or 13 0 psf.
(b) pleeward = 6 7 or 16 4 psf.
• Thesolutiontotheopampproblemis:
• Thesolutiontotheelectricalengineeringcircuitsexamproblemis:
(c) pwindwardroof = 7 0 or 16 8 psf, pleewardroof = 9 0 or 18 7 psf.