The article A Probabilistic Model of Fracture in Concrete and Size Effects on Fracture Toughness (Magazine of Concrete Res., 1996: 311320) gives arguments for why the distribution of fracture toughness in concrete specimens should have a Weibull distribution and presents several histograms of data that appear well fit by superimposed Weibull curves. Consider the following sample of size n 18 observations on toughness for high-strength concrete (consistent with one of the histograms); values of pi (i .5)/18 are also given. Observation .47 .58 .65 .69 .72 .74 pi .0278 .0833 .1389 .1944 .2500 .3056 Observation .77 .79 .80 .81 .82 .84 pi .3611 .4167 .4722 .5278 .5833 .6389 Observation .86 .89 .91 .95 1.01 1.04 pi .6944 .7500 .8056 .8611 .9167 .9722 Construct a Weibull probability plot and comment.
Povertyand Intervention March18,2016 2:37PM Humanitarianintervention: Genuinehumanitarianinterventionisunlikely,asrealistanalysisgoes,butwhilenoteverysinglecountry willparticipate,orwilljoinforhumanreasons,itisstillpossible.Anationmaywanttointerveneina placewithmanyofitsnationalsorwitha connectiontoit.This isn'tbad,they'restilltryingtolookout fortheirpeople.Thequestioniswhatprinciplesgovernit. Buttherealquestionis,whatwouldthealternativebeNotdoinganythingisn'tacceptable,buthowdo wemakesurewe'renothurtingthesituationandhowtoweimproveitinthe longrunLookingat long- termissues,we'renotthatgoodat fixingit.Tensionsmayflareuplater,ora disastercouldstrike. Poverty: Today'squestionis,whatroleisplayedbyglobalpoliticsandgovernanceonthepersistenceofpoverty Therearetwosetsofapproachesto poverty.Theorthodoxapproachissimple,alacko resourcesto meetone'sneeds.Theotherdefinitionismoreabstract,theinabilitytomeetone'sneedandtorealise oneselfandmaintaintheirwellbeing,physicalorotherwise. Thecausesofpovertyarea majorpointofdiscussion.Availabilityofresourcesalwayscomesup,and nowclimatefactorsarecomingintothediscussion.Deficientinfrastructureortheabsenceofitcan makeeconomicexchangedifficultorimpossible.Youcan'taccessmarketsorexchangeanything.Access tohealthandeducationservicesisacause,andpoliticalinstabilityandconflictaregoingtocausemajor issues.Allthispointstothecreationofpovertytraps.Thisistheideathatmost orallthesefactorsare there.Theycanbegottenridof,but you can't do itbecauseyoudon't havethemeans.Aninvestmentof somemoneyorresourcescouldgiveyouthemeanstoriseupeconomically,butmaybeyoudon'thave themeanstomakethat investment.Outsidefactors,likenaturaldisasters,canmakeitamuch worse problemaswell,soyoucanneversaveevenasmallamountforyourself. ThomasMalthusputforwardan ideainthe 1800s that humanitywasdoomed.Cropyieldgrows arithmetically,hesaid,whilehumanpopulationgrowsexponentially. Malthusconsideredthepeoplevulnerabletothesameissuesasrabbits,starvation,predators,illness. Wedon'thavepredators,andillnessisalwayslessofanissuethanitwasbefore.Malthusfocusedon starvation,sayinghumansexpandedgeometrically,doublingevery25years,butfoodexpanded arithmetically,andcouldn'tgrowfastenough.Peoplewouldgrowtoomuchandcausea famine,then dieout.Then,makemorepeopleanddoitallagain.Thisledto lackof EnglishinterventionintheIrish potatofamine. However,duringhislifethepopulationgrewbyhalfabillion.Nowwehavesevenbillion.HEwaswriting atthetimethat itwas juststartingto swingup.He didn'trealisethatmajorinnovationsinfood productionwerehappening.China,forinstance,wasrevolutionisingricefarming.Europewasalso learningaboutanimalhusbandryandseedpresses.Tohim,itseemedlikethiswasjustdelayingthe inevitabledeathandcausingmoremisery.Agriculturalinnovationswereactuallyprovinghimwrong. Thistheoryisstillsupportedbymany,especiallywithclimatechangeandtheideathatthereisjustfinite spaceontheplanet.Malthusdidn'tseeusadaptingwelltoenvironmentalchanges,buthumanscan actuallyadaptandbenefit. Thisreasoningisatthecore ofmany traditionalororthodoxideasofwhattodo and whatthecauses are.Criticspointoutthehugeincreaseinfoodproductionwe'veseen.Theyalsopointoutthatthe globalsouthmakesmostofthefoodandthenorth buysmostof it.Studieshaveshownwhenfamines occur,foodavailabilitypercapitahasn'treducedprecedingit,itwasbecauseofotherconcerns. However,wedohavefoodissues.Richerpeoplewantmoremeatandthings,whichtakesmore resourcetomake. Therearemanychallengesfordevelopmentofpoverty-strickenareas.Nationsandregionshavelimited resources,andpopulationsizeordensitycanbeahugeproblem.Diseasecanreallyaffectthingsaswell. resources,andpopulationsizeordensitycanbeahugeproblem.Diseasecanreallyaffectthingsaswell. It'sdifferentforeachplace,andwedon'tknowifinterveningwillwork.Thereareseveraloptionsof whattodo, andwe can't besurewhat theright choiceis. Casestudy#1: MillenniumDevelopmentGoals TheUN launched frameworkwitheightgoalstofightpoverty.Thefirstwastohalveextremepoverty andhunger,achieveuniversalprimaryeducation,promotegenderequality,reducechildmortality, improvematernalhealth,combatvariousmajordiseases,ensureenvironmentalsustainabilityand developaglobalpartnershipfordevelopment. Theratepeopleindevelopingcountriesunderextremepovertyhasgonefrom47%to14%. Thegoalof halvingitwasmetfiveyearsearly,andwhiletheywouldhavelikedtoeliminateit,it'sstillnumerically quitenice. Forgettingkidsintoprimaryeducation,thenumberofthemoutofschoolwentdownfrom100 million to57. Theglobalnumberofdeathsinchildrenunder5wentfrom12.7 millionto6million. Substantialprogresshasbeenmade,althoughitislimited,andit'sverydisparateacrossregions.Alotof thedatacame fromChinaspecifically,withitsmassivepopulationandgrowth.Thegoalstostaunching genderinequalityweremet,butotherissuespersistthatwerenottouched.Incomeinequalityhas increased,especiallyalongtherural-urbandivide. Pros:Nationscanhelpeachotherout andpush eachotherto bebetter.It respectssovereigntysince youcan go aboutithoweveryoulike,butyouhavetoreportit. It wasn'ta lot oftime,butit startedfrom alargeknowledgebase. Cons:Notenoughattentionwasgiventoseproblems,especiallyinruralregions.Settingaggressive goalsmeanttheyweregoingtogoafterthe easiernumberstochange,whichleftsomeoftheharder issues.Jurisdictioncouldgetinthewayaswell,withsomecountriestryingtokeepothersoutandsome countriesbeingpushedtomakechangestheydidn'thavethemeansto,althoughprogressreportseach yearcan mitigatethis,showingwhattheycanandcan't do.This seta fieldformoreinternational conflict.Structuralfactorscanbehard to factorin.Politicalinstitutionsandeconomiescanbevery importantandveryhardto address. Thereisa newsetofgoalsfor2030, the SustainableDevelopmentGoals.Firstistoeradicateextreme poverty,definedaslessthan$1.25/day.It'sa verylonglistofgoalsthough,notas simpleaframework andfewguidelinesfortheinternationalcommunity. TheMDG's experienceshowshowtheinternationalcommunitycagettogetherandhavepositive impactsontheseissuesandhavediscussions.Itcanalsohavea reallynegativeimpact,likeapproach andwhoimposeswhatonwho. PovertyandtheGlobalEconomy: Globaltradeiseasyenoughtoexplain,goodsandservicesconsumedoutofthenationofitsmaking.The practiceismuchmorecomplicated,butthebasicideaisthere.Globalfinanceishardertodefine,It's referringtointernationalflowsofmoneyforinvestmentandtradefinancing.Inthefinancialincomesfor middleincomecountries,aidisn'tamajorpart of income,butitreallyisforlowincomecountries. Thereisa regionaldisparityfortrade,mostofitisbetweenwesterncountries.Countriesandcompanies arepressuredtofollowtheirownprinciples,aCanadiancompanygetsintohotwaterifitworkswitha dictatororin a placewithlaxenvironmentallaws. Threeinstitutionsarethemostimportantforthis.TheWorldTradeOrganisation,puttingalegal frameworkfortradearoundtheworld.Theywanttostop alliancesaroundit,puteveryoneatthesame table.TheInternationalMonetaryfund,whichhasaprettybadreputationsincethe80s and90s. They tryto ensureworldfinancialstability,includinglendingmoneytocountriesinfinancialcrises.Andthe WorldBank,whichismostlyfocusedondevelopmentprojectsandgivingexpertisetoeconomically developingcountries,similartotheWTO. Thereisgoodinthisintermsof poverty.Ifyou'rea memberoftheWTO you haverightsandhelpand accesstoexpertise.IMFloanscanhelpouta country incrisis,providingfundstostabilisethecountry. TheWorldBankhas fundedmanyprojectsfocusedondevelopment,althoughitisoftencriticisedfor notmeetingitsgoals.Butevenstill,ithashelpedmanypeople. Thereare,ofcourse,consforthisas well.TheWTOis abouttraderules,andlegaldisputesaskfor expertisemanycountriesdon'thave.Itmightpreventtougherenvironmentalandlabourregulations. TheWTO agreementisabout10000 pages,mostofwhichare exceptions.Havingalegalsystemthatis notenforcedisaproblem.TheIMF andWB are dominatedbecountriesthatfinancethem,sothis introducesalotofpolitics. TheWTO wasmeantto bringallthecountriesintotheglobaleconomyandhavethembenefitfrom largemarketsandsellcheapgoods.Ifyou'reanunderdevelopedcountry,mostofwhatyou'vegotis agriculturalandrawproducts.TheWTO hasn't beengoodat gettingrichcountriestoabandontheir systemsofagriculturalsupport.TheIMFandtheWB are criticisedfortheideologicalpositions embeddedinsomeoftheirprograms.Intheory,thisismeanttostopdictatorsfromkeepingmoney fromtheirpeople,butinpractice,policyrestrictionssetbytheIMFhavetakenchoiceawayfromnon- dictatorialregimesandhaveimpactedthelivesofthepeopleinthecountrywhocan'thavea saynow.