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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Zkvalitňování informačních toků v silniční nákladní dopravě se zaměřením na dopravní podnik / Improvements of information flows in road haulage

MEJDA, Vít January 2011 (has links)
The dissertation thesis works out the problematic of increasing quality in information flow in road haulage. The thesis highlights logistic chains of road haulage of both carload freight and colli deliveries. Research project took place in two divisions of the biggest south bohemian transport company ČSAD JIHOTRANS a.s. The specified quality improvement of information flows comes out from implementation of new information technologies. The dissertation thesis is not only the description of new functions of implemented technologies, but it mainly describes consequential changes, which are necessary to perform in order to reach requested improvements.
42

Knowledge base and perception on sustainability in the long-haul transport sector in Brazil

Alf Svensson, Joel January 2018 (has links)
demand for truck transportation is increasing and in the shadow the CO2 (carbon dioxide) emissions. In many parts of the world the majority of the transportation of goods is done by long-haulage trucks. More than 60% of all goods transported in Brazil are made by trucks (André Luiz Cunhaa, 2011). Therefore, it is critical to find solutions and actions on how to reduce the CO2 footprint.This thesis presents an evaluation of the knowledge and perceptions of sustainability among truck drivers and long-haulage freight transport companies in Brazil. For this, surveys to drivers and with a combination of surveys and interviews to logistics companies were done. The surveys and interviews covered energy and environmental related questions such as eco-driving, alternative fuels, fuel reductions actions, emissions, engine efficiency and the EU emissions standards.It has been found that only slightly more than half of the truck drivers have education in eco-driving despite that eco-driving is considered as the strongest action for reducing fuel consumption. In addition, many drivers do not know the benefits with eco-driving. However, this lack of knowledge among the drivers is in contrast known by the logistic companies. All logistics companies stated that eco-driving can decrease the fuel consumption by 10%, based on experience. The results are also an indication that there is a connection between companies with profit and eco-driving education. For companies with profit, 70% of the truck drivers have been educated in eco-driving, whereas companies with economic loss only 50% of the truck drivers are educated eco-driving . Another finding is that around half of the driver does not know the difference between the European emissions standards, again in contrast to the logistic companies management were all contacted knew the difference, i.e. emissions. This potentially indicates a lack of knowledge exchange between the management in logistic companies and the truck drivers.In addition to eco-driving, the drivers and logistics companies consider driving outside peak hours and the use of connectivity as strong actions for reducing their fuel consumption. Increasing the load capacity and custom made truck was not a frequent answer when asking how the drivers think they can reduce their fuel consumption. A result is also that one third of the logistic companies have been considering switching from petroleum diesel to alternative fuels.Both the truck drivers and the logistic companies know that the currently used trucks are not a sustainable transportation mode. They see the lack of economic incentives as the highest barrier for a more environment friendly transportation system and not the technology needed.In order to reduce the greenhouse gas emissions from the long-haulage sector, more drivers must be educated in eco-driving and the knowledge has to be increased regarding among other the benefits with eco-driving and the difference between the Euro standards. Decreasing the amount of empty trips is also an approach that should receive more attention. / Efterfrågan på lastbilstransporter ökar och därmed utsläppen av koldioxid. I många delar av världen görs majoriteten av godstransporter av lastbilar. Mer än 60% av alla gods som transporteras i Brasilien utförs av lastbilar (André Luiz Cunhaa, 2011). Därför är det viktigt att hitta lösningar och åtgärder för att minska koldioxidavtrycket från sektorn.Denna uppsats presenterar en utvärdering av kunskapen och uppfattningarna om hållbarhet hos de lastbilsförare och godstransportföretag i Brasilien. För detta genomfördes enkätutdelning till förare och med en kombination av enkätutdelning och intervjuer hos logistikföretagen. Undersökningarna och intervjuerna omfattade energi- och miljörelaterade frågor som eco-driving, alternativa bränslen, bränslereducerande åtgärder, CO2 utsläpp, motor effektivitet och EU: s utsläppsnormer (Euro 1-5).Det har visat sig att endast drygt hälften av lastbilschaufförerna har utbildning i eco-driving trots att eco-driving anses vara den starkaste åtgärden för att minska bränsleförbrukningen. Däremot vet många förare inte fördelarna med eco-driving. Denna brist på kunskap bland förarna är däremot känd av de logistiskföretagen ledning. Samtliga logistikföretag uppgav att eco-drivning kan minska bränsleförbrukningen med 10%, baserat på erfarenheter. Enkätresultaten visar också en indikation på att det finns en koppling mellan företag med vinst och eco-driving. För företag med vinst har 70% av lastbilschaufförerna utbildats i eco-driving, medan företag med ekonomisk förlust där endast 50% av lastbilschaufförerna är utbildade eco-driving. Ett annat resultat är att ungefär hälften av föraren inte känner till skillnaden mellan de europeiska utsläppsnormerna, i motsats till logistiskföretagens ledning där alla kontaktade visste skillnaden, det vill säga utsläpphalten. Detta indikerar en brist på kunskapsutbyte mellan ledningen i logistikföretag och lastbilsförarna.Förutom eco-driving ser både lastbilschafförerna och logistikbolagen körning utanför rusningstraffiken samt användning av connectivity som starka åtgärder för att minska bränsleförbrukningen. Att öka lastkapaciteten och custom made trucks var inte ett vanligt svar när enkäten frågade hur förarna tror att de kan minska sin bränsleförbrukning. Ett resultat är också att en tredjedel av de logistiskbolagen har övervägt att byta från petroleumdiesel till alternativa bränslen.Både lastbilsförarna och logistikföretagen vet att de för nuvarande använda lastbilarna inte är hållbart ur ett miljöperspektiv. De ser bristen på ekonomiska incitament som det högsta hinderet för ett miljövänligare transportsystem och inte brist på teknik.För att minska utsläppen av växthusgaser från långdistanssektorn måste fler förare utbildas i eco-driving och kunskapen måste ökas, bland annat med fördelarna med eco-driving och skillnaden mellan Euro-normerna. Att minska antalet tomma resor är också ett tillvägagångssätt som bör uppmärksammas mer.
43

Peat exploitation on Thorne Moors. A case-study from the Yorkshire-Lincolnshire border 1626-1963, with integrated notes on Hatfield Moors

Limbert, Martin January 2011 (has links)
In its industrial heyday, Thorne Moors was the most extensive commercial peat operation in Britain. It became closely tied to nearby Hatfield Moors, and at both the methods of exploitation were essentially the same. Although much of Thorne Moors is situated in Yorkshire, the eastern extent lies in Lincolnshire. Recognizable differences in scale and methodology existed between the Yorkshire and Lincolnshire parts. After regional drainage in the 1620-30s, there was increased trade in the peat of Thorne Moors along the River Don. A succession of uses included unrefined and refined fuel, products from carbonization and distillation, and moss litter for working horses. From the mid-19th century, companies were formed to exploit the new uses, especially moss litter, and export became increasingly focused on railways. In 1896, the British Moss Litter Co. Ltd was set up (restructured 1899) to assume the Thorne/Hatfield interests of several smaller companies, including the Anglo-Dutch Griendtsveen Moss Litter Co. Ltd. The British Moss Litter Co. was acquired by Fisons Ltd in 1963. Following a contextual history, descriptions are given of both muscle-powered peat winning and transportation methodologies. These comprise exploitation in the 17th and 18th centuries, an examination of the 19th century writings of William Casson, and written allusions spanning 1863-1963. Information is imparted on the Griendtsveen Moss Litter Co. In addition to creating a 'Dutch' peat canal system, this company introduced an immigrant Dutch workforce, proficient in their native methods and intended inter alia to retrain local workers looking for employment with Griendtsveen. Dutch methodology persisted alongside the local methods for c.60 years. Accounts are also presented of the evolutionary limit of indigenous peat winning, and the use of narrow gauge railways. Finally the transition to mechanisation of peat cutting and narrow gauge haulage is outlined.
44

Visualizing potential for improvements in the information flow for road haulages : Exploratory case study on two Swedish road haulage firms / Visualisera potential för förbättringar av informationsflödet för vägtransport åkerier : Explorativ fallstudie av två svenska vägtransport åkerier

Khateeb, Yones, Atta, Mahmoud January 2022 (has links)
Background: The understanding of the inefficiencies that the road haulages suffer from is more important than ever, specifically in today's society where the environmental problems and technological development are rapidly increasing. The perception of the inefficiencies could support road haulage firms to improve their operations. In addition, industry and commerce can develop new technology to decrease the inefficiency in the industry. This master thesis will contribute to more knowledge regarding the inefficiencies that road haulages suffer from to favour road haulage firms and the society’s economic development. Purpose: The purpose of the master thesis is, to identify and visualize the root causes in information flow that leads to inefficiencies. The impact the inefficiencies have on the physical flow, will also be investigated.Methods: The research strategy adopted to fulfil the purpose of the thesis consist of a detailed empirical case study at two road haulage firms. The data were collected through semi- and un- structured interviews. The data were analysed with the data reduction approach. Furthermore, numerous adopted frameworks 7-waste framework, RCA & Ishikawa matrix, and data flow diagram from previous studies were used to analyse the derived data from the interviews. Results: The results revealed that road haulages were operating in similar processes and the conveyed information during an operation was similar between the two case firms. Most of the root causes in the information flow occurred during upstream operations for both case firms, which affected the downstream operations. There were 4 different types of inefficiencies that were similar in both case firms. The manual handling of information, misunderstanding during operations, customer requirements, and incorrect runs. Conclusions: The findings of this study prove that (1) the road haulage industry has a similar conveyed information flow throughout the conducted operations. (2) The root causes in the information flow that leads to inefficiencies, appeared foremost in the upstream operations for the road haulage industry. (3) The inefficiencies inhibited mostly the utilization of time and cost during operations for the road haulage industry, which was a subjective judgment from the authors based on adopted frameworks. / Bakgrund: Att förstå den ineffektivitet som åkerierna lider av är viktigare än någonsin, särskilt i dagens samhälle där miljöproblem och den tekniska utvecklingen ökar snabbt. Förståelsen av ineffektivitet kan stödja åkeriföretag i arbetet mot att förbättra sin verksamhet. Dessutom kan industri och handel utveckla ny teknik för att minska ineffektivitet i branschen. Detta examensarbete kommer att bidra till mer kunskap om ineffektivitet som åkeriföretag lider av, med målet att gynna åkeribranschen och samhällets ekonomiska utveckling.Syfte: Syftet med examensarbetet är att identifiera och visualisera rotorsakerna i informationsflödet som kan leda till ineffektivitet samt undersöka dess påverkan på det fysiska flödet.Metod: Den forskningsstrategi som använts för att uppfylla syftet med uppsatsen bestod av en detaljerad empirisk fallstudie på två åkeriföretag. Data samlades in genom semi- och ostrukturerade intervjuer för att sedan analyseras med den så kallade data reduktion metoden. Vidare har ett flertal ramverk från tidigare studier, så som ”7-waste framework”, ”data flow diagram” och ”RCA & Ishikawa matrisen” använts för att analysera data från intervjuerna för att uppfylla syftet med studien.Resultat: Resultatet påvisade att åkerier inom branschen opererade med snarlika processer. Den information som förmedlades under en operation var likartad mellan de två firmorna i fallstudien. De flesta rotorsakerna i informationsflödet inträffade i uppströmsverksamheten för båda firmorna i fallstudien, vilket påverkade nedströmsverksamheten. Det fanns fyra olika ineffektivitetsproblem som var likartade i de båda fallstudierna. Manuell hantering av information, missförstånd under drift, kundkrav och felaktiga körningar.Slutsatser: Slutsatserna av denna studie visar, (1) att informationsflödet som förmedlas under operationer för åkeribranschen är likartade, (2) att rotorsakerna i informationsflödet som leder till ineffektivitet visade sig förekomma uppströms under operationer för åkeribranschen, (3) ineffektivitetsproblemen som förekom från informationsflödet påverkade det fysiska flödet med högre ledtider och ökade kostnader för åkerinäringen, vilket var en subjektiv bedömning av författarna baserat på de adopterade ramverken.
45

Kontrola bezpečnostního mechanismu přípojných vozidel / Analysis the safety mechanism of the trailers

Pantůček, Michal January 2019 (has links)
This diploma thesis is engaged in the analysis of a safety mechanism, which is a part of a truck trailer. This mechanism provides a safe and firm connection of a container to the trailer. Primarily abroll containers according to German standard DIN 30 722 are being transported. The introductory part of the thesis deals with the current traffic condition and the accident rate in the Czech Republic. Legislative requirements for safety elements of trailer technology for road transportation are further defined. They are followed by a recherche of industrial solutions for securing mechanisms. Consequently calculations to obtain necessary securing force were performed. An analysis of the mechanism kinematics was carried out then. A structural check of selected mechanism elements was carried out following the kinematics check. Further, an optimalization of a transom design was carried out followed by another structural check. The structural checks were carried out using both the analytical method and the finite element method. In conclusion design documentation was elaborated. This diploma thesis was elaborated in cooperation with the SVAN Chrudim s.r.o.
46

Capital and Operational Cost Evaluation of Selected Powertrain configurations in Heavy-duty Fuel Cell Trucks / Kapital och driftskostnadsutvärdering av utvalda drivlinakonfigurationer i tunga bränslecellstruckar

Vivek Venkatesh, Shenoy January 2021 (has links)
The automotive and heavy-duty trucking industries are heading towards research and development of alternative powertrain solutions to meet the United Nations sustainability goals and cleaner solutions to aid climate change actions. This thesis project aligns with the vision of finding greener and sustainable modes of transport in the heavy long haulage trucking industry. This project aims to find and develop a method for creating drive cycles, getting the vehicular power requirements to drive on these selected routes and finally calculating the TCO of a vehicle. The scripts for these mentioned steps are developed in MATLAB. The approach used in this work could help both the vehicle manufacturer and the vehicle operator to predict or cater to upcoming customer demand on, in our case, routes pan EU, to receive information about energy, power and vehicular configuration needed to fulfil the mission, and also, optimize the powertrain configuration in collaboration with a parallel thesis work done here at Scania, and finally calculate a somewhat simplified TCO of the vehicle.  In this work, two different driving conditions has been used; summer or winter, and two different payload conditions, as well as two types of vehicle powertrains; FCEV and BEV. Finally, a comparison regarding TCO for FCEV and BEV has been done. / Fordonsindustrin, inklusive den kommersiella lastbilsindustrin, driver utvecklingen av alternativa drivlinor för att kunna uppfylla FN:s hållbarhetsmål kring miljövänligare lösningar, nödvändiga för att stödja det globala klimatarbetet. Detta examensarbete utgår från visionen att hitta miljövänligare fordonstyper inom den kommersiella lastbilssektorn. Detta projekt siktar på att utveckla och använda metoder för att kunna ta fram relevanta körcykler, fastställa nödvändig framdrivningseffekt för att fordonen ska kunna köra på utvalda rutter, samt att beräkna total ägandekostnad (TCO) för fordonsoperatören.  Skripten för dessa nämnda steg har utvecklats i MATLAB inom projektet. Tillvägagångssättet som har använts i detta arbete kan hjälpa både fordonstillverkare och fordonsoperatörer att förutspå framtida krav. I vårt fall har information om nödvändig energimängd, effekt och komponentkonfiguration, inklusive drivlineoptimering, tagits fram för rutter inom EU, tillsammans med ett parallellt examensarbete som också utförts på Scania. Slutligen beräknades den totala ägandekostnaden (TCO) för kunden.  I detta arbete har två olika användarfall analyserats; sommar och vinter, för två olika nyttolaster, samt två typer av drivlinor; FCEV och BEV. Slutligen, har en jämförelse gjorts gällande TCO för FCEV och BEV.
47

Analýza činnosti dopravního operátora / An analysis of a transport operator´s job description

HOUZIMOVÁ, Jana January 2008 (has links)
An analysis of a transport operator´s job description My degree work is centred on the problems of a transport operator´s job in a forwarding agency. The introduction provides an explanation of a term of "dispatch service" and explains why logistics is so important in transport. Then there is a description of the transport development after 1990 and the changes transport had to undergo in the time of globalization. The main part of the work deals with the operator´s working procedure from an offer to a demand, an order and other actions to the final realization. A model example is given to represent an actual transporting process. The work also states conditions under which transport is executed, for example payment terms and terms of delivery. Next chapters outline the way of calculation, give a detailed description of collecting service (which is implemented within the bounds of CS Expres system) and of storing problems including the introduction of bar codes in stores and possibilities of logistic service extension. The conclusion is focused on the firm developing strategy.

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