Dissertations / Theses on the topic 'Time travel'
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Wan, Ke. "Estimation of Travel Time Distribution and Travel Time Derivatives." Thesis, Princeton University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3642164.
Full textGiven the complexity of transportation systems, generating optimal routing decisions is a critical issue. This thesis focuses on how routing decisions can be computed by considering the distribution of travel time and associated risks. More specifically, the routing decision process is modeled in a way that explicitly considers the dependence between the travel times of different links and the risks associated with the volatility of travel time. Furthermore, the computation of this volatility allows for the development of the travel time derivative, which is a financial derivative based on travel time. It serves as a value or congestion pricing scheme based not only on the level of congestion but also its uncertainties. In addition to the introduction (Chapter 1), the literature review (Chapter 2), and the conclusion (Chapter 6), the thesis consists of two major parts:
In part one (Chapters 3 and 4), the travel time distribution for transportation links and paths, conditioned on the latest observations, is estimated to enable routing decisions based on risk. Chapter 3 sets up the basic decision framework by modeling the dependent structure between the travel time distributions for nearby links using the copula method. In Chapter 4, the framework is generalized to estimate the travel time distribution for a given path using Gaussian copula mixture models (GCMM). To explore the data from fundamental traffic conditions, a scenario-based GCMM is studied. A distribution of the path scenario representing path traffic status is first defined; then, the dependent structure between constructing links in the path is modeled as a Gaussian copula for each path scenario and the scenario-wise path travel time distribution is obtained based on this copula. The final estimates are calculated by integrating the scenario-wise path travel time distributions over the distribution of the path scenario. In a discrete setting, it is a weighted sum of these conditional travel time distributions. Different estimation methods are employed based on whether or not the path scenarios are observable: An explicit two-step maximum likelihood method is used for the GCMM based on observable path scenarios; for GCMM based on unobservable path scenarios, extended Expectation Maximum algorithms are designed to estimate the model parameters, which introduces innovative copula-based machine learning methods.
In part two (Chapter 5), travel time derivatives are introduced as financial derivatives based on road travel times—a non-tradable underlying asset. This is proposed as a more fundamental approach to value pricing. The chapter addresses (a) the motivation for introducing such derivatives (that is, the demand for hedging), (b) the potential market, and (c) the product design and pricing schemes. Pricing schemes are designed based on the travel time data captured by real time sensors, which are modeled as Ornstein-Uhlenbeck processes and more generally, continuous time auto regression moving average (CARMA) models. The risk neutral pricing principle is used to generate the derivative price, with reasonably designed procedures to identify the market value of risk.
Gilmore, G. Matthew. "The philosophy of time travel." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq24846.pdf.
Full textRadtke, William Joseph. "Three Attempts at Time Travel." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/1909.
Full textNykvist, Joar. "Data-Driven Travel Time Prediction." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255023.
Full textAtt ge noggranna förutsager om restider för fordon i trafik är av intresse både för privata förare som försöker hinna med sina scheman, och företag som behöver organiska logistik för transporter. Denna rapport görs på uppdrag av svenska lastbilstillverkaren Scania CV AB, och har som mål att använda GPS-data från Scanias fordon till att träna maskininlärningsmodeller för att förutsäga hur lång tid det tar för fordon att resa mellan stopp. De prediktiva modellerna som implementeras använder variabler som konstrueras från relativt enkel information från fordonen, men lyckas ändå nå hög prediktiv prestanda i vissa scenarion. Två olika ansatser prövas för att förutsäga restider, en ansats med lokala modeller, och en ansats med global modell. I ansatsen med lokala modeller tränas flera separata regressorer på geografiska delmängder av datan, vilka sedan kombineras och ger globala förutsägor. I ansatsen med global modell tränas en enda regressor på hela datamängden. Ansatsen med global modell visar sig ha högre prestanda i experimenten, men ansatsen med lokala modeller förevisar ändå vissa lovande tendenser. Resultaten antyder att en regressor ger mycket noggrannare prediktioner när den geografiska spridningen i datan begränsas.
Swärdh, Jan-Erik. "Commuting time choice and the value of travel time." Doctoral thesis, Örebro universitet, Handelshögskolan vid Örebro universitet, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-8524.
Full textSwärdh, Jan-Erik. "Commuting time choice and the value of travel time /." Örebro : Örebro Universitet, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-8524.
Full textAlvarez, Patricio A. "A Methodology to Estimate Time Varying User Responses to Travel Time and Travel Time Reliability in a Road Pricing Environment." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/631.
Full textBusby, Janie Amber. "The development of mental time travel /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18615.pdf.
Full textSigakova, Ksenia. "Road Freight Transport Travel Time Prediction." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3031.
Full textJohansson, Martin. "Travel Time Estimations Using Bluetooth Data." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112097.
Full textTaylor, Robin. "Airport access and travel time uncertainty." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/7336.
Full textNey, Sharon Elizabeth. "The logical possibility of time travel." Thesis, Durham University, 1993. http://etheses.dur.ac.uk/1025/.
Full textWang, Heng. "Travel Time Estimation on Arterial Streets." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/36235.
Full textMaster of Science
Pereira, Iman, and Guangan Ren. "Travel time estimation for emergency services." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158178.
Full textWu, Jingcheng. "Travel time estimation on urban arterials ? a real time aspect." Thesis, The University of Wisconsin - Milwaukee, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10250523.
Full textThis dissertation attempts to develop simple and direct approaches to estimate the vehicle queue length and travel time along signalized arterial links for real-time traffic operations. This dissertation is the first to demonstrate a process using vehicle trajectory data to generate detector volume, speed and time occupancy data, along with the generalized flow rate, density and space mean speed data. This approach minimizes detector over-counting and miss-counting issues. The detection zone can be of any shape or size and at any location along the trajectory. The relationships among detector volume, speed and time occupancy along signalized arterials are analyzed theoretically and experientially. If the generalized definitions of flow rate, density and space mean speed are used, the fundamental relationship, v = ds, holds valid in a signalized arterial environment. The fundamental relationship diagram plotted using field signalized arterial data has not been seen in any of the literatures reviewed.
Within the defined time-space region, the scatter diagram of the generalized density and the detector time occupancy presents a strong linear correlation. Simply converting detector volume counts within one data collection time period to use as the generalized flow rate introduces estimation errors. There are two major reasons. The first is that vehicles don’t completely cross the detector during the data collection time period. The second is that it assumes vehicles would evenly spread across the data collection time period when crossing the detection zone. Traffic flow intensity is introduced and defined within the time-space regions to provide much more accurate description of the traffic flow arrival and departure conditions.
This dissertation attempts to make improvements to the input-output technique for queue estimation along signalized links. Based on analyses of the theoretical and experiential cumulative input-output diagrams, also known as the Newell Curves, two major improvements are proposed to improve the performance of the input-output technique. The improvements take into account vehicles stop on top of detectors in the estimation, make necessary adjustments to detector vehicle counts, and introduce a reset mechanism to remove the accumulated estimation errors during a long time period. The improvements are tested using two sets of field data. One set of data are 10-second queue and virtual detector data generated using the Federal Highway Administration Next Generation Simulation Peachtree Street dataset. The other set of data are field manually collected 20-second queue, and loop detector vehicle count and time occupancy data at metered on-ramps. It is concluded that both improvements help to produce estimation results far better than the original input-output technique. With adjusted detector vehicle counts, the performance of the Kalman Filter queue estimation model is also improved.
A simple conservation law approach is developed to estimate travel time along signalized arterial links. Inputs used include the traffic flow intensity at input and out detectors, plus the initial vehicle queue. The estimated travel time is tested with the field travel time data to evaluate the performance of the estimation. The developed model is also compared with the NCHRP Project 3-79 model and the Little’s Law queueing theory model. The developed model performs much better for per short interval travel time estimation.
The proposed travel time estimation approach only uses the detector volume and time occupancy data. It does not rely on signal timing data to estimate the control delay or a delay model to estimate the queueing delay. In addition, neither roadway geometry nor vehicle length data are used.
Hodges, Fiona. "Travel time budgets in an urban area /." Connect to thesis, 1994. http://eprints.unimelb.edu.au/archive/00000227.
Full textSoltani, Sofie Safeyeh. "Hydrological Transport in Shallow Catchments: : tracer discharge, travel time and water age." Doctoral thesis, KTH, Skolan för arkitektur och samhällsbyggnad (ABE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214971.
Full textQC 20170928
Soriguera, Martí Francesc. "Highway travel time estimation with data fusion." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/108910.
Full textTravel time information is the key indicator of highway management performance and one of the most appreciated inputs for highway users. Despite this relevance, the interest of highway operators in providing approximate travel time information is quite recent. Besides, highway administrations have also recently begun to request such information as a means to measure the accessibility service provided by the road, in terms of quality and reliability. In the last century, magnetic loop detectors played a role in providing traffic volume information and also, with less accuracy, information on average speed and vehicle length. New traffic monitoring technologies (intelligent cameras, GPS or cell phone tracking, Bluetooth identification, new MeMS detectors, etc.) have appeared in recent decades which permit considerable improvement in travel time data gathering. Some of the new technologies are cheap (Bluetooth), others are not (cameras); but in any case most of the main highways are still monitored by magnetic loop detectors. It makes sense to use their basic information and enrich it, when needed, with new data sources. This thesis presents a new and simple approach for the short term prediction of toll highway travel times based on the fusion of inductive loop detector and toll ticket data. The methodology is generic and it is not technologically captive: it could be easily generalized to other equivalent types of data. Bayesian analysis makes it possible to obtain fused estimates that are more reliable than the original inputs, overcoming some drawbacks of travel time estimations based on unique data sources. The developed methodology adds value and obtains the maximum (in terms of travel time estimation) of the available data, without falling in the recurrent and costly request of additional data needs. The application of the algorithms to empirical testing in AP-7 toll highway in Barcelona proves our thesis that it is possible to develop an accurate real-time travel time information system on closed toll highways with the existing surveillance equipment. Therefore, from now on highway operators can give this added value to their customers at almost no extra investment. Finally, research extensions are suggested, and some of the proposed lines are currently under development.
Pells, S. R. "Evaluation of reductions in travel time variability." Thesis, University of Leeds, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278793.
Full textLi, Xia. "Travel time prediction using ensemble learning algorithms." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/53358/.
Full textChen, Daizhuo. "Modeling travel time uncertainty in traffic networks." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61889.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 147-154).
Uncertainty in travel time is one of the key factors that could allow us to understand and manage congestion in transportation networks. Models that incorporate uncertainty in travel time need to specify two mechanisms: the mechanism through which travel time uncertainty is generated and the mechanism through which travel time uncertainty influences users' behavior. Existing traffic equilibrium models are not sufficient in capturing these two mechanisms in an integrated way. This thesis proposes a new stochastic traffic equilibrium model that incorporates travel time uncertainty in an integrated manner. We focus on how uncertainty in travel time induces uncertainty in the traffic flow and vice versa. Travelers independently make probabilistic path choice decisions, inducing stochastic traffic flows in the network, which in turn result in uncertain travel times. Our model, based on the distribution of the travel time, uses the mean-variance approach in order to evaluate travelers' travel times and subsequently induce a stochastic traffic equilibrium flow pattern. In this thesis, we also examine when the new model we present has a solution as well as when the solution is unique. We discuss algorithms for solving this new model, and compare the model with existing traffic equilibrium models in the literature. We find that existing models tend to overestimate traffic flows on links with high travel time variance-to-mean ratios. To benchmark the various traffic network equilibrium models in the literature relative to the model we introduce, we investigate the total system cost, namely the total travel time in the network, for all these models. We prove three bounds that allow us to compare the system cost for the new model relative to existing models. We discuss the tightness of these bounds but also test them through numerical experimentation on test networks.
by Daizhuo Chen.
S.M.
Fina, Mark H. "Urban Spatial Structure and Household Travel Time." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/11272.
Full textPh. D.
Ahmed, Asif. "Human Energy Expenditures and Travel Time Budgets." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/14192.
Full textHollander, Yaron. "The cost of bus travel time variability." Thesis, University of Leeds, 2006. http://etheses.whiterose.ac.uk/306/.
Full textAdams, David Lewis. "Integrating travel time reliability into management of highways." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 52 p, 2008. http://proquest.umi.com/pqdweb?did=1459913561&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Full textMcCaughey, Michael. "Travel-time tomography of wide-angle seismic data." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389868.
Full textGerstle, David G. "Understanding bus travel time variation using AVL data." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70763.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 89-94).
The benefits of bus automatic vehicle location (AVL) data are well documented (see e.g., Furth et al. (2006)), ranging from passenger-facing applications that predict bus arrival times to service-provider-facing applications that monitor network performance and diagnose performance failures. However, most other researchers' analyses tend to use data that they acquired through negotiations with transit agencies, adding a variable cost of time both to the transit agencies and to researchers. Further, conventional wisdom is that simple vehicle location trajectories are not suitable for evaluating bus performance (Furth et al. 2006). In this research, I use data that are free and open to the public. This access enables researchers and the general public to explore bus position traces. The research objective of this Master's Thesis is to build a computational system that can robustly evaluate bus performance across a wide range of bus systems under the hypothesis that a comparative approach could be fruitful for both retrospective and real-time analysis. This research is possible because a large number of bus providers have made their bus position, or AVL, data openly available. This research thus demonstrates the value of open AVL data, brings understanding to the limits of AVL data, evaluates bus performance using open data, and presents novel techniques for understanding variations in bus travel time. Specifically, this thesis demonstrates research to make the system architecture robust and fruitful: " This thesis explores the exceptions in the various datasets to which the system must be robust. As academics and general public look to exploit these data, this research seeks to elucidate important considerations for and limitations of the data. " Bus data are high-dimensional; this research strives to make them dually digestible and informative when drawing conclusions across a long timescale. Thus, this research both lays the foundation for a broader research program and finds more visually striking and fundamentally valuable statistics for understanding variability in bus travel times.
by David G. Gerstle.
S.M.in Transportation
Smith, Galen T. "Evaluating Arterial Congestion and Travel Time Reliability Performance." UKnowledge, 2016. http://uknowledge.uky.edu/ce_etds/46.
Full textWlodarczyk, Romain. "Empty Railcar Repositioning Subject to Travel Time Uncertainty." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/31235.
Full textThis thesis presents the linear program used in a prototype tool for the optimization of empty railcar repositioning strategy designed for the SNCF1. The resulting schedule is computed with CPLEX and minimizes moving cost, delay and unfulllment penalties. Substitutions of railcar categories are also permitted and eventually penalized. In addition, uncertainty on travel times is handled by considering the expected cost of a move (regarding delay probability and possible penalties) and by adding slack periods at the end of moves. The robustness can be modulated through the use of a cursor. Finally, the model enforces a decision making process previously dened by the SNCF to ensure that the suggested planning can be easily grasped and trusted by users.
Schedules have then been generated based on randomly generated data and simulated. Results show a potential saves of 10% on considered costs and a good range of use of the robustness cursor is suggested.
Finally, paths for improvement of this prototype are proposed to meet the eventual schedulers'
further needs in order to move forward the production of this tool at the company
scale.
Master of Science
Ding, Silin. "Freeway Travel Time Estimation Using Limited Loop Data." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1205288596.
Full textZhu, Fulin. "Locations of AVI System and Travel Time Forecasting." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33578.
Full textMaster of Science
Zhang, Xu. "INCORPORATING TRAVEL TIME RELIABILITY INTO TRANSPORTATION NETWORK MODELING." UKnowledge, 2017. http://uknowledge.uky.edu/ce_etds/54.
Full textKrishnamoorthy, Rajesh Krishnan. "Travel time estimation and forecasting on urban roads." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/7320.
Full textHan, Jiang. "Multi-sensor data fusion for travel time estimation." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9603.
Full textNordström, Maria. "Is time money? Philosophical perspectives on the monetary valuation of travel time." Licentiate thesis, KTH, Filosofi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278152.
Full textDenna licentiatavhandling består av en introduktion och treartiklar som på olika sätt berör värdering av restid. Vare sigvi vill det eller inte är vår vardag driven av och bunden av tid.Vi planerar vår tid, spenderar vår tid och stressar när tideninte räcker till. Det vi önskar, vill och måste göra tar tid; tidenvillkorar helt enkelt mycket i våra liv. Om det är så att vi villförflytta oss från en fysisk plats till en annan, kanske mellanhem och jobb eller skola, tar det tid. Den här specifika tiden,restiden, antas behövas på grund av behovet av att jobba, fikaeller handla, inte genom en önskan om att resa i sig (även omdet självklart finns resor vi gör för nöjes skull, där nöjet är självaresan). I och med att resan (och restiden) är nödvändig men intei sig önskvärd är det ett grundläggande antagande inom fältetför transportekonomi att människor vill minimera sin restid i såstor utsträckning som möjligt. Det är det här antagandet sommycket av planeringen och investeringarna i transporter grundarsig på. Genom att undersöka betalningsvilja hos resenärer kanman sätta ett monetärt värde på potentiellt insparad restid: tidblir pengar. Men är det verkligen så enkelt? Till att börja medär tid och pengar de facto inte samma sak. Vi kan inte sparatid på samma sätt som pengar utan sparad tid måste användasomedelbart. Det blir därmed rimligt att anta att vad man gör medden insparade tiden spelar roll eftersom tiden känns mer värd omden kan spenderas på något meningsfullt. Vad man har möjlighetatt göra beror ofta på sammanhanget och upplevs därför mindreflexibelt än när det gäller insparade pengar.Denna avhandling resonerar vidare kring frågor om förhållandetmellan tid och pengar, i synnerhet den vanligt förekommandeoch generellt accepterade monetära värderingen av restid. Tillviss del problematiserar avhandlingen antagandet att tid är pengar och frågar sig om inte för mycket fokus läggs på tidskvantitetframför tidskvalitet och att kan det vara värdefullt att reflekterakring vilka transportinvesteringar som detta gynnar. Syftet äratt undersöka om de vedertagna transportekonomiska modellersom tillämpas idag speglar sådant vi som samhälle värdesätteroch lyfta aspekter som möjligen förbises.Introduktionen till avhandlingen består av en metodologiskdiskussion kring filosofins roll i tvärvetenskapliga projekt, enöversiktlig teoretisk bakgrund till begrepp såsom rationalitetoch välfärdsekonomi och en genomgång av teman som på etteller annat sätt berör värdering av tid. Därefter sammanfattasartiklarna och introduktionen avslutas med slutsatser och ettavsnitt om möjliga framtida forskningsämnen.Den första artikeln i den här avhandlingen handlar om hurförhållandet mellan tid och pengar kan bättre förstås genom attutgå från tiden som det primära att värdesätta. Denna analysoch de insikter som analysen leder till kan därefter förklara ochbättre underbygga antaganden som görs vid modellering av beslutrörande tid. I artikeln analyseras egenskaper av tid i relation tillpengar som framkommit i beteendevetenskaplig och psykologiskforskning. I transportekonomi, likt traditionell mikroekonomi,utgår man från ett antagande om stabila rationella preferenser hosindivider. Givet skillnader mellan hur individer verkar resonerakring tid jämfört med pengar kan man dock ställa sig frågan omdet skulle kunna vara annorlunda att vara rationell med avseendepå tid jämfört med att vara rationell med avseende på pengar. Isynnerhet då det finns egenskaper hos tid som är så pass specifikaatt motsvarande egenskaper inte finns hos andra typer av objekteller varor. Sammantaget hävdar vi att det enkla förhållandetmellan tid och pengar inte är tillräckligt rättfärdigat i ljuset av defaktiska skillnaderna mellan tid och pengar som verkar föreligga.Den andra artikeln i avhandlingen rör upplevelser av restid ochförhållandet mellan upplevelsen och de teoretiska antagandenasom görs i transportekonomi. I artikeln analyserar vi upplevelser av restid hos resenärer som påverkades av det plötsliga införandetav identitetskontroller vid resor mellan Sverige och Danmark 2015.Mot bakgrund av en studie där upplevelserna dokumenteradesvisar vi på aspekter av restid som upplevs men inte speglas i vedertagnatransportekonomiska modeller. Artikeln delar upp dessaaspekter i tre kategorier: (i) aspekter rörande den faktiska restatiden och upplevelser av själva resan, (ii) kortsiktiga anpassningartill rådande omständigheter och (iii) långsiktiga anpassningar tillrådande omständigheter. Vi menar att restiden behöver sättasi ett vidare perspektiv genom att se resan och restiden i ettsammanhang där planering av vardagen är en förutsättning föratt få livet att gå ihop. Ett möjligt sådant perspektiv är att urplaneringssynpunkt sträva efter att göra tiden så ‘planerbar’ sommöjligt, alltså att underlätta individers långsiktiga och kortsiktigaplanering av både restid och resor, istället för att enkom serestid som onytta.I tredje artikeln tillämpas till viss del insikter om vad som skiljertid från pengar och dessa appliceras på värdering av restid försjälvkörande fordon. Värdet av restid beror traditionellt (blandannat) på transportmedel, det vill säga om resan görs med bil,buss eller tåg. Självkörande bilar har i litteraturen setts som ytterligareresslag, ofta en ny sorts bil. Vi menar dock att självkörandefordon kan mynna ut i många olika typer av transportmedel därvissa kommer att likna de vi har idag medan andra kommer attvara nya sett till resegenskaper. Givet att dessa egenskaper är relateradetill aspekter som påverkar resenärers värdering av restidkommer tiden alltså vara olika mycket värd. Värdering av restidför självkörande fordon bli därför mer komplext än att lägga tillett eller ens några ytterligare transportmedel. För att belysa dettagör vi i artikeln en så kallad morfologisk analys där vi spännerupp ett lösningsfält vi menar täcker in aspekter som påverkarvärderingen av restid för självkörande fordon. Sedan analyserarvi möjliga (och troliga) lösningar, där varje lösning motsvararett möjligt transportmedel, och menar att restidsvärdet för dessa lösningar rimligen bör skilja sig åt. Det leder oss till att föreslåatt ett alternativt sätt att segmentera restidsvärde skulle kunnavara att utgå från resegenskaper, snarare än transportmedel somsådana. Sådana resegenskaper skulle kunna vara privat/deladresa eller om resan sker efter tidtabell eller är “on-demand“.Sammanfattningsvis menar jag att monetär värdering av tidkan ses från tre perspektiv: (i) det linjära förhållandet mellan tidoch pengar som sådant, (ii) aggregeringen av individers insparaderestid till faktisk samhällsnytta och (iii) restidsförkortningarsplats i kostnadsnyttoanalys och transportplanering i allmänhet.Transportinvesteringar görs på lång sikt och de samhällsekonomiskakalkyler som ligger till grund för dessa investeringar behöverdärmed spegla både vårt förhållande till tid idag men även hur vikommer att förhålla oss till tiden i framtiden. Rimligen kommervi då ha lika mycket tid som idag, men kommer vårt förhållandetill tid vara detsamma?Slutligen föreslår jag i avhandlingen möjliga framtida temanatt undersöka vidare, såsom transporträttvisa, aggregering avväldigt små restidsvinster och förhållandet mellan risker ochtidsvinster.
QC 20200819
Khoei, Amir Mohammad. "Arterial short-term travel time prediction using Bluetooth data." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/73816/1/Amir%20Mohammad_Khoei_Thesis.pdf.
Full textZinner, Stephanie. "A methodology for using bluetooth to measure real-time work zone travel time." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45936.
Full textSingh, Darshan R. "Estimation of Travel Time on Signalized Arterial Highway Corridor." Cincinnati, Ohio University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1116258396.
Full textWu, Seung Kook. "Adaptive traffic control effect on arterial travel time charateristics." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31839.
Full textCommittee Chair: Hunter, Michael; Committee Member: Guensler, Randall; Committee Member: Leonard, John; Committee Member: Rodgers, Michael; Committee Member: Roshan J. Vengazhiyil. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Khandelwal, Madhur Jugalkishore. "Semantics of time travel in a generative information space." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1354.
Full textLu, Chenxi. "Improving Analytical Travel Time Estimation for Transportation Planning Models." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/237.
Full textDanielsson, Sara. "Machine Learning Approaches on a Travel Time Prediction Problem." Thesis, KTH, Optimeringslära och systemteori, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223660.
Full textDenna rapport behandlar uppskattningar av restider mellan två punkter på en karta, utifrån en kombination data från vägnät (på en skala av vägsegment) och historisk data från utförda resor (på en större skala, som resorna). Huvudidén är att uppskattningarna kan förbättras genom att införa en korrigeringsfaktor som uppskattas utifrån den historiska resdatan. Korrigeringsfaktorn uppskattas både genom maskininlägningsmetoder, mer specifikt med regression baserad på Gaussianska processer, och med en enkel referensmetod inspirerad av en metod i litteraturen. Två olika kärnfunktioner används vid den Gaussinaska regressionen: en kvadratiskt exponentiellt kärna och en strängkärna. Den metod som använder strängkärnan är den mest lovande metoden i denna studie, då den presterar bättre än de båda andra.
Miick, Tonja. "Minimizing Travel Time Through Multiple Media With Various Borders." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1246.
Full textRaustøl, Johannes. "Value of Travel Time Savings — Estimates on Norwegian Cyclists." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for samfunnsøkonomi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23155.
Full textJain, Juliet Cecelia. "Networks of the future : time, space and rail travel." Thesis, Lancaster University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420557.
Full textKeshaboina, Akhylesh. "Analysis of forecasted travel time benefits against those realised." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2009. http://hdl.handle.net/10092/8903.
Full textChan, Ping-ching Winnie, and 陳冰淸. "The value of travel time savings in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31954789.
Full textWedin, Daniel. "Travel Time Estimation in Stockholm Using Historical GPS Data." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-260692.
Full textFRID, MARINA DE CASTRO. "MIRRORS OF TIME: TRAVEL AND TRANSIENCE IN CINEMA NARRATIVES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=34902@1.
Full textCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTITUIÇÕES COMUNITÁRIAS DE ENSINO PARTICULARES
A presente tese analisa as representações de viagens no tempo em um conjunto de produções da indústria cinematográfica dos Estados Unidos. O objetivo do estudo é compreender as concepções sobre o tempo elaboradas nos filmes selecionados e como estas se relacionam com o pensamento e as práticas do Ocidente moderno-contemporâneo. Especificamente, a investigação foca em filmes nos quais personagens rompem com a cronologia de uma sequência de eventos ou vivenciam determinados momentos repetidas vezes. A expressão viagem no tempo envolve significados diversos. Portanto, o esforço de pesquisa começa por entender suas possíveis definições. O primeiro capítulo faz uma revisão de algumas das vertentes teóricas sobre o tempo na tradição filosófica-científica ocidental. Já o segundo capítulo explora interpretações sobre o fenômeno do mito e, além disso, examina o histórico da ficção científica. Após delimitar e detalhar o material selecionado no terceiro capítulo, a tese se volta para a análise textual dos filmes. O exame do conjunto indica três grandes questões atreladas às viagens no tempo: as cosmologias e imagens do fim do mundo; a demarcação e conexão de diferentes tempos por meio de objetos; e a problematização das relações sociais, sobretudo, o parentesco. Cada uma dessas questões é analisada no quarto capítulo. A tese demonstra como os filmes traduzem o tempo em termos concretos através das trajetórias dos personagens e seus artefatos, que, ao desconhecerem a ordem histórica, geram paradoxos, encontros e desencontros na vida social.
This thesis analyzes representations of time travel in an ensemble of productions from the United States film industry. The purpose of this study is to understand the notions of time portrayed in the selected films and how these are related to modern-contemporary Western thought and practices. Specifically, the investigation focuses on movie pictures in which characters break from the chronology of a sequence of events or experience the same moment repeatedly. The term time travel involves diverse meanings. Therefore, the research effort begins by understanding its possible definitions. The first chapter reviews some of the theoretical strands about time in Western philosophical and scientific traditions. The second chapter explores interpretations about the phenomenon of myth and the history of science fiction. After delimiting and describing the selected material in the third chapter, the thesis proceeds to the textual analysis of films. The examination of the ensemble indicates three main issues related to time travel: cosmologies and images of the end of the world; objects as markers of and connections between different temporalities, and the questioning of social relations, above all, kinship. Each one of these issues is analyzed in the fourth chapter. The thesis demonstrates how films translate time in concrete terms through the trajectories of characters and their artifacts that, unbounded by the historical order, engender paradoxes, meetings, and mismatches in social life.
Godkin, Carl B. "Travel time inversion of multi-offset vertical seismic profiles." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/52884.
Full textMicrofiche copy available in Archives and Science.
Bibliography: p. 125-126.
by Carl B. Godkin.
M.S.