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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.
31

Evaluation on the cross-border transportation of port industry

Chang, Hung-hong, Cavin., 張雄康. January 2000 (has links)
published_or_final_version / Urban Planning / Master / Master of Science in Urban Planning
32

Project planning systems of air and rail cargo terminals.

January 1990 (has links)
by Chiu Wing-cheong, Lui Shu-tim. / Thesis (M.B.A.)--Chinese University of Hong Kong, 1990. / Bibliography: leaves 68-69. / ABSTRACT --- p.ii / TABLE OF CONTENTS --- p.iv / LIST OF ILLUSTRATIONS --- p.vi / LIST OF TABLES --- p.vii / ACKNOWLEDGEMENTS --- p.viii / Chapter / Chapter I. --- INTRODUCTION --- p.1 / Growth of Freight Industry --- p.1 / Objectives of the Project --- p.2 / Hong Kong Air Cargo Terminals Limited --- p.3 / Kowloon-Canton Railway Corporation --- p.4 / Impact of Changes in China --- p.8 / Chapter II. --- PROJECT PLANNING MODELS --- p.11 / Management of Project --- p.11 / Project Life Cycle Model --- p.12 / Project Management Functions --- p.15 / Input-Output System Model --- p.16 / Chapter III. --- RESEARCH METHODS --- p.20 / Chapter IV. --- PROJECT PLANNING SYSTEMS --- p.22 / Definition and Classification of Projects --- p.22 / Project Conception and Budgeting --- p.24 / Organising for Project Planning --- p.27 / Procedures for Project Approval and Authorisation --- p.35 / Implementation and Control of Authorised Projects --- p.39 / Applicability of Theory and Model --- p.42 / Chapter V. --- EVALUATION OF THE TWO PROJECT PLANNING SYSTEMS --- p.50 / Strengths and Weaknesses --- p.50 / Internal and External Limitations --- p.53 / Chapter VI. --- CONCLUSION AND RECOMMENDATION --- p.58 / Hong Kong Air Cargo Terminals Limited --- p.58 / Kowloon-Canton Railway Corporation --- p.60 / Overall Conclusion --- p.63 / APPENDIX --- p.64 / BIBLIOGRAPHY --- p.68
33

Labour management and technological change : a history of stevedoring in Durban : 1959-1990.

Dubbeld, Bernard. January 2002 (has links)
This thesis considers the history of stevedoring work and workers in Durban between 1959 and 1990. In particular I focus on the two distinct themes of "labour management" and "technological change" in order to denlonstrate the transformations that have occurred in the port. In examining the dranlatic technological changes in the harbour I analyze the particular difficulties that the industry faced in coping with the deluands of the changes in the structure ofthe global shipping industry. In discussing the different reginles of labour adnlinistration in the harbour I show the relationships between the implementation ofApartheid and the practice of stevedoring work in Durban. Finally I show how these thenles are related in carefully considering the positions of these workers at the nloments of technological change, retrenchment and unionization. I suggest that we cannot understand these processes of change without understanding the specific kinds of control under which these workers laboured during Apartheid. / Thesis (M.A.)-University of Natal,Durban, 2002.
34

A dry port as an expansion option for the Cape Town container terminal

De Wet, Christiaan Johannes 04 1900 (has links)
Thesis (MScEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: Currently maritime ports, including the Port of Cape Town, experience congestion, pollution and other logistics-related problems due to increasing levels of container traffic. The presence of these problems has caused port planners, port operators and logistics firms to look for new solutions in this transport sector. The dry port concept, whereby offloaded containers are stored outside the maritime port in a dedicated logistics area, is recognized as a means for solving some of these major problems, thereby promoting economic development and logistics integration as well as reducing the demand on limited capacity (land and access) at the maritime port. Therefore, the core objective of this study is to demonstrate that the implementation of the dry port concept is a feasible alternative for expanding the throughput capacity of the Cape Town Container Terminal. The Port of Cape Town is strategically one of the best placed ports in South Africa as it is positioned at the South Western extremity of the continent of Africa, thereby linking America and Europe with Asia, the Far East and Australia. Furthermore, the Port of Cape Town also forms a direct link between international trade and about three (3) million consumers in the Western Cape. The recent expansion of the Cape Town Container Terminal was a major investment which included the upgrading of equipment and the expansion of workable surface area, thereby increasing the container terminal yard capacity to 1.4million TEU (TEU = Twenty foot Equivalent Unit) per annum. However, this report showed that the abovementioned increase in volumes as well as the resulting congestion continues to be a challenge at the Port of Cape Town. Firstly, the predicted future container volumes show that the demand in the Port of Cape Town could reach between 1.9 million and 3.2 million TEU per annum by 2039. Secondly, the evaluation of the operational and infrastructural characteristics of the existing Cape Town Container Terminal demonstrated that container terminal yard (CY) area is the capacity limiting characteristic of the terminal and that the operational and infrastructural limits could be reached between 2018 and 2026. The two main functions of a dry port in the Western Cape transportation network would be international trade processing and congestion relief, which are achieved through the duplication and supplementation of the Cape Town Container Terminal facilities at an inland location. The dry port would allow the Western Cape supply chain to absorb any future container volume demands that exceed the CY capacity of the Port of Cape Town and could potentially attract an annual throughput of 0.7 million TEU by 2039. Furthermore, the facility could address the problem of congestion in and around the greater Cape Town metropolitan, resulting in an improved transportation network that will have a positive effect on passenger traffic, productivity of trucks, competitiveness of the Port of Cape Town as well as the environmental sustainability of the transportation system. The dry port concept would therefore be appealing to Transnet Port Authority / Transnet Port Terminals, Shippers and Logistics Managers and the Western Cape Regional Community. The site selection analysis performed in this study evaluated three possible dry port locations, namely: Kraaifontein Area, Ysterplaat Air Force Base and Bellville Precinct. Although the analysis identified that all three of the sites have the potential to be developed into a successful dry port; however, that the Bellville Precinct is the preferred location due to the presence of the Belcon freight rail facility. The success of such a facility will greatly depend on the project’s ability to ensure that the resources needed for the initial investment is kept to a minimum, and ultimately the most viable dry port solution in the Western Cape region would be the phased development of Bellville Precinct. From this it is clear that a dry port could be a feasible alternative for expanding the throughput capacity of the Port of Cape Town, as well as improving the transport infrastructure in the Cape Town area. / AFRIKAANSE OPSOMMING: Maritieme hawens, insluitende die Kaapstadse hawe, ondervinding tans opeenhoping, besoedeling en ander logistieke probleme as gevolg van toenemende vlakke van die houer verkeer. Die teenwoordigheid van hierdie probleme het veroorsaak dat hawe beplanners, hawe-operateurs en logistiek maatskappye op soek is vir nuwe oplossings in die vervoer sektor. Die droë hawe konsep word erken as 'n middel vir die oplossing van sommige van hierdie probleme, en sodoende ekonomiese ontwikkeling en logistieke integrasie te bevorder, sowel as die verlaging van aanvraag op beperkte kapasiteit (grond en toegang) by die maritieme hawe. Daarom is die kern doel van hierdie studie om aan te toon dat die implementering van die droë hawe konsep 'n haalbare alternatief is vir die uitbreiding van die deurset kapasiteit van die Kaapstadse Houerterminaal. Die Kaapstadse hawe is strategies een van die bes geplaaste hawens in Suid-Afrika, want dit is geleë aan die suid-westerlikste punt van Afrika en verbind Amerika en Europa met Asië, die Verre Ooste en Australië. Verder vorm die Kaapstadse hawe ook 'n direkte skakel tussen die buitelandse markte en die drie (3) miljoen verbruikers in die Wes-Kaap. Die onlangse uitbreiding van die Kaapstadse Houerterminaal het die stoorkapasiteit van die terminaal aansienlik verbeter an 1.4 miljoen TEU per jaar, deur middel van die opgradering van toerusting en die uitbreiding van werkbare oppervlak. Hierdie verslag bewys egter dat die bogenoemde toename in volumes sowel as die gevolglike opeenhoping steeds teenwoordig is in die Kaapstadse hawe. Eerstens, die voorspelde toekomstige houervolumes toon dat die aanvraag in die Kaapstadse hawe tussen 1.9 miljoen en 3.2 miljoen TEU's per jaar kan bereik teen 2039. Tweedens, die evaluering van die operasionele en infrastrukturele kenmerke van die bestaande Kaapstadse Houerterminaal het getoon dat die houer stoorarea die kapasiteit beperkende kenmerk van die terminaal is en dat die operasionele en infrastrukturele perke moontlik tussen 2018 en 2026 bereik kan word. Die twee hoof funksies van 'n droë hawe in die Wes-Kaap vervoer netwerk sal internasionale handel verwerking en opeenhoping verligting wees. Hierdie funksies sal bereik word deur die duplisering en aanvulling van die Kaapstadse Houerterminaal fasiliteite by 'n binnelandse perseel. Die droë hawe sal toelaat dat die Wes-Kaap verskaffersiklus enige toekomstige houervolumes, wat meer is as die houer stoorarea kapasiteit van die Kaapstadse hawe, te kan hanteer en kan potensieel 'n jaarlikse deurset van 0.7 miljoen TEU hanteer. Verder kan die
35

A case study on the export cargo delivery origniated [sic] from the Pearl River Delta. / Case study on the export cargo delivery originated from the Pearl River Delta

January 2000 (has links)
by Tong Kwok Kan. / Thesis (M.B.A.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaf 59). / ABSTRACT --- p.i / TABLE OF CONTENTS --- p.iv / LIST OF TABLES --- p.vi / LIST OF FIGURES --- p.vii / Chapter Chapter I. --- INTRODUCTION --- p.1 / Gateways to the Pearl River Delta --- p.3 / Open Door Policy --- p.5 / Export --- p.5 / Entrepot Role of Hong Kong --- p.7 / Performance of Our Seaport................................................................................................. --- p.8 / Chapter Chapter II. --- INTEREST OF STUDY AND OBJECTIVES --- p.12 / Chapter ChapterIII. --- COMPANY BACKGROUNDS OF REGALTRONIC AND GENALEX --- p.15 / Chapter Chapter IV. --- OPERATIONS --- p.17 / Export Logistics Process --- p.21 / Track and Trace Capability --- p.27 / Chapter Chapter V. --- DISCUSSION --- p.42 / Why FOB is Popular in Export Sales Contract --- p.42 / Who Determines the FOB Port --- p.45 / APPENDIX A --- p.49 / APPENDIX B --- p.54 / BIBLIOGRAPHY --- p.59
36

Modeling and control of helicopters carrying suspended loads

Adams, Christopher James 05 July 2012 (has links)
Helicopters are often used to transport supplies and equipment. When a heavy load is carried via suspension cables below a helicopter, the load oscillates in response to helicopter motion and disturbance forces, such as wind. This oscillation is dangerous and adversely affects control of the helicopter, especially when carrying large or heavy loads. By adding input shaping to the helicopter's flight controller, the suspended load oscillation caused by helicopter motion is greatly reduced. A significant benefit of this approach is that it does not require measurement of the load position. This thesis contains derivations and analysis of simple planar helicopter-load dynamic models, and these models are verified using experimental data from model-scale, radio-controlled helicopters. The effectiveness of input shaping at eliminating suspended load oscillation is then demonstrated on this experimental hardware. In addition, the design of an attitude command, near-hover flight controller that combines input shaping and a common flight control architecture is illustrated using dynamic models of a Sikorsky S-61 helicopter, and simulation results are shown for example lateral and longitudinal repositioning movements. Results show that applying input shaping to simulated pilot commands greatly improves performance when carrying a suspended load.
37

Capacidade de carga, sintomas musculoesqueléticos e classificações posturais na atividade de costureiras / Capacity of charge, musculoskeletal symptoms and postural ratings on seamstresses activity

Pizyblski, Elisandra Montes 29 September 2015 (has links)
Capes / O objetivo deste estudo foi encontrar correlação entre as posturas adotadas e os respectivos riscos posturais, a dor e/ou sintomas musculoesqueléticos e a capacidade de carga em costureiras de indústrias de confecção de vestuário da cidade de Ponta Grossa, Paraná. A amostra foi composta por costureiras do gênero feminino. O problema que se avista para a presente pesquisa centra-se: De que maneira, as posturas e a força de preensão manual aplicadas e utilizadas no trabalho, afetam a sintomatologia da dor e os sintomas musculoesqueléticos, em trabalhadoras de indústrias de confecção? O referencial teórico pautou-se em: indústria têxtil, características da indústria de confecção de vestuário, ergonomia, postura, efeitos causados ao trabalhador na postura sentada, coluna vertebral e a postura sentada, avaliação ergonômica, métodos de avaliação de análise postural, avaliação dos sintomas musculoesqueléticos e sua localização e avaliação da capacidade de carga. Quanto à abordagem metodológica, a pesquisa classifica-se como quali-quantitativa, descritiva e de levantamento. A pesquisa foi desenvolvida em cinco empresas do ramo de confecção do vestuário, totalizando 57 costureiras. Os instrumentos utilizados para a coleta de dados foram questionários, entrevistas, o método REBA (Rapid Entire Body Assessment) para avaliação das posturas, o Diagrama de Corlett e Manenica para a localização da dor nos segmentos corporais e intensidade e dinamômetro para medir a força de preensão manual. A pontuação média no método REBA da amostra foi de 4,75 (± 0,46). A maioria das costureiras (80,70%) respondeu que possui dor em algum segmento corporal, ou em membros superiores ou inferiores, e apenas 19,30% da amostra disse não sentir desconforto. Os segmentos corporais que as costureiras da amostra não apresentaram dor foram: a bacia, o braço esquerdo, o antebraço direito e o punho direito. Com relação aos membros superiores, o que apresentou maior relato de dor foi a região lombar, com 40,35%. A segunda região de maior dor é a cervical, com 36,84%, seguido da região da costa média com 24,56%. A quarta região foi o pescoço, com 22,80% e a quinta foi a costa superior, com 17,54%. Com relação aos membros inferiores, a maior queixa de dores foi nas pernas, com 56,14%, contra apenas 5,26% nas coxas. A média da capacidade de carga das costureiras, medida através da força de preensão manual foi de 24,7 quilos (± 5,81). Os resultados das correlações entre as três variáveis: postura, dor e capacidade de carga apresentaram correlação fraca ou ausente, pois a correlação entre postura e dor foi ausente, e as correlações entre postura e dor e entre dor e capacidade de carga foram de r: 0.017. Acompanhando o trabalho das costureiras, foi possível identificar que as principais posturas adotadas ao longo da jornada laboral podem contribuir para o desenvolvimento de lesões musculoesqueléticas. / The aim of this study was to find correlation between the positions taken and their risk posture, pain and / or musculoskeletal symptoms and the load capacity of seamstresses on the industry of clothing in the city of Ponta Grossa, Paraná. The sample consisted of seamstresses female. The problem that can be seen to this research focuses: How postures and grip strength applied and used at work, affect the symptoms of pain and musculoskeletal symptoms in workers in clothing industries? The theoretical framework was based on: textile industry, the clothing industry characteristics, ergonomics, posture, the effects caused in seated posture, spine and sitting posture, ergonomic evaluation, postural analysis of assessment methods, evaluation of musculoskeletal symptoms and assessing their location and load capacity. Regarding the methodological approach, the research is classified as qualitative and quantitative, descriptive and lifting. The research was conducted in five companies in the garment manufacturing industry, totaling 57 seamstresses. The instruments used for data collection were questionnaires, interviews, the REBA (Rapid Entire Body Assessment) method for assessment of attitudes, the Diagram Corlett and Manenica to the location of pain in the body segments and intensity and dynamometer to measure the force handgrip. The average score in REBA sample method was 4.75 (0.46). Most seamstresses (80.70%) replied that he has pain in a body part, or upper limbs or lower, and only 19.30% of the sample said no discomfort. The body segments that seamstresses sample did not experience pain were: the basin, the left arm, right forearm and right wrist. Regarding the upper limbs, which showed greater account of pain was a lumbar region, with 40.35%. The second area of greatest pain is the cervical, with 36.84%, followed by the middle coast region with 24.56%. The fourth area was the neck, with 22,80% and the fifth was the upper coast, with 17.54%. Regarding the lower limbs, the biggest complaint was pain in the legs, with 56.14%, compared to 5.26% in the thighs. The average load capacity of seamstresses, measured by grip strength was 24.7 kilograms (5.81). The results of the correlations between the three variables: posture, pain and load capacity had weak or no correlation because the correlation between posture and pain was absent, and the correlations between posture and pain and between pain and cargo capacity were r: 0017. Following the work of seamstresses, it observed that the main stances adopted during the working day can contribute to the development of musculoskeletal injuries.
38

Capacidade de carga, sintomas musculoesqueléticos e classificações posturais na atividade de costureiras / Capacity of charge, musculoskeletal symptoms and postural ratings on seamstresses activity

Pizyblski, Elisandra Montes 29 September 2015 (has links)
Capes / O objetivo deste estudo foi encontrar correlação entre as posturas adotadas e os respectivos riscos posturais, a dor e/ou sintomas musculoesqueléticos e a capacidade de carga em costureiras de indústrias de confecção de vestuário da cidade de Ponta Grossa, Paraná. A amostra foi composta por costureiras do gênero feminino. O problema que se avista para a presente pesquisa centra-se: De que maneira, as posturas e a força de preensão manual aplicadas e utilizadas no trabalho, afetam a sintomatologia da dor e os sintomas musculoesqueléticos, em trabalhadoras de indústrias de confecção? O referencial teórico pautou-se em: indústria têxtil, características da indústria de confecção de vestuário, ergonomia, postura, efeitos causados ao trabalhador na postura sentada, coluna vertebral e a postura sentada, avaliação ergonômica, métodos de avaliação de análise postural, avaliação dos sintomas musculoesqueléticos e sua localização e avaliação da capacidade de carga. Quanto à abordagem metodológica, a pesquisa classifica-se como quali-quantitativa, descritiva e de levantamento. A pesquisa foi desenvolvida em cinco empresas do ramo de confecção do vestuário, totalizando 57 costureiras. Os instrumentos utilizados para a coleta de dados foram questionários, entrevistas, o método REBA (Rapid Entire Body Assessment) para avaliação das posturas, o Diagrama de Corlett e Manenica para a localização da dor nos segmentos corporais e intensidade e dinamômetro para medir a força de preensão manual. A pontuação média no método REBA da amostra foi de 4,75 (± 0,46). A maioria das costureiras (80,70%) respondeu que possui dor em algum segmento corporal, ou em membros superiores ou inferiores, e apenas 19,30% da amostra disse não sentir desconforto. Os segmentos corporais que as costureiras da amostra não apresentaram dor foram: a bacia, o braço esquerdo, o antebraço direito e o punho direito. Com relação aos membros superiores, o que apresentou maior relato de dor foi a região lombar, com 40,35%. A segunda região de maior dor é a cervical, com 36,84%, seguido da região da costa média com 24,56%. A quarta região foi o pescoço, com 22,80% e a quinta foi a costa superior, com 17,54%. Com relação aos membros inferiores, a maior queixa de dores foi nas pernas, com 56,14%, contra apenas 5,26% nas coxas. A média da capacidade de carga das costureiras, medida através da força de preensão manual foi de 24,7 quilos (± 5,81). Os resultados das correlações entre as três variáveis: postura, dor e capacidade de carga apresentaram correlação fraca ou ausente, pois a correlação entre postura e dor foi ausente, e as correlações entre postura e dor e entre dor e capacidade de carga foram de r: 0.017. Acompanhando o trabalho das costureiras, foi possível identificar que as principais posturas adotadas ao longo da jornada laboral podem contribuir para o desenvolvimento de lesões musculoesqueléticas. / The aim of this study was to find correlation between the positions taken and their risk posture, pain and / or musculoskeletal symptoms and the load capacity of seamstresses on the industry of clothing in the city of Ponta Grossa, Paraná. The sample consisted of seamstresses female. The problem that can be seen to this research focuses: How postures and grip strength applied and used at work, affect the symptoms of pain and musculoskeletal symptoms in workers in clothing industries? The theoretical framework was based on: textile industry, the clothing industry characteristics, ergonomics, posture, the effects caused in seated posture, spine and sitting posture, ergonomic evaluation, postural analysis of assessment methods, evaluation of musculoskeletal symptoms and assessing their location and load capacity. Regarding the methodological approach, the research is classified as qualitative and quantitative, descriptive and lifting. The research was conducted in five companies in the garment manufacturing industry, totaling 57 seamstresses. The instruments used for data collection were questionnaires, interviews, the REBA (Rapid Entire Body Assessment) method for assessment of attitudes, the Diagram Corlett and Manenica to the location of pain in the body segments and intensity and dynamometer to measure the force handgrip. The average score in REBA sample method was 4.75 (0.46). Most seamstresses (80.70%) replied that he has pain in a body part, or upper limbs or lower, and only 19.30% of the sample said no discomfort. The body segments that seamstresses sample did not experience pain were: the basin, the left arm, right forearm and right wrist. Regarding the upper limbs, which showed greater account of pain was a lumbar region, with 40.35%. The second area of greatest pain is the cervical, with 36.84%, followed by the middle coast region with 24.56%. The fourth area was the neck, with 22,80% and the fifth was the upper coast, with 17.54%. Regarding the lower limbs, the biggest complaint was pain in the legs, with 56.14%, compared to 5.26% in the thighs. The average load capacity of seamstresses, measured by grip strength was 24.7 kilograms (5.81). The results of the correlations between the three variables: posture, pain and load capacity had weak or no correlation because the correlation between posture and pain was absent, and the correlations between posture and pain and between pain and cargo capacity were r: 0017. Following the work of seamstresses, it observed that the main stances adopted during the working day can contribute to the development of musculoskeletal injuries.
39

Influencia dos paletes de madeira no comportamento das estruturas de armazenagem do tipo drive-in com um nivel de carregamento / Influence of wood pallets in the behavior of drive-in racks with one level of loading

Paixão, Antonio Medeiros da 25 February 2005 (has links)
Orientador: Mauro Augusto Demarzo / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil / Made available in DSpace on 2018-08-06T05:05:30Z (GMT). No. of bitstreams: 1 Paixao_AntonioMedeirosda_M.pdf: 9672207 bytes, checksum: e011879d8aa4447d3e547b2abf30df2a (MD5) Previous issue date: 2005 / Resumo: Este trabalho tem como objetivo o de mostrar experimentalmente a influência que os paletes de madeira podem exercer no comportamento das estruturas de armazenagem do tipo drive in com um nível de carregamento. Considerar o palete com apoios móveis em ambos os braços da estrutura, ou por outro lado, desconsiderá-lo totalmente na análise estrutural, pode resultar em análises irreais, pois o atrito entre o palete e os trilhos pode influenciar no comportamento deste tipo de estrutura. A fim de se verificar a existência desta influência em condições próximas à realidade, dois pórticos com características semelhantes às dos fornecidos pelas empresas fabricantes foram testados com a utilização de três tipos de paletes com características semelhantes às dos paletes encontrados no mercado, com inércias variadas, apoiados sobre trilhos pintados. Estes paletes foram testados sobre trilhos com mesas abrasivas a fim de se verificarem possíveis diferenças nos deslocamentos entre as estruturas carregadas com paletes sobre trilhos pintados e entre as estruturas carregadas com paletes sobre trilhos com mesas abrasivas. Além disso, os pórticos foram testados com um palete suspenso com o objetivo de simular o modelo teórico elaborado pelo Slope-deflection. Cada pórtico foi testado com as forças verticais de 245N, 490N, 735N e 980N aplicadas nos braços e com a força horizontal de 1,5% correspondente ao valor da força vertical aplicada neste pórtico para simular possíveis forças horizontais aplicadas pelas empilhadeiras na movimentação dos materiais. Dois relógios comparadores com sensibilidade de 1/1000mm e um com sensibilidade de um 1/100mm, todos com curso de 10mm, foram colocados, respectivamente, no topo e na base de cada uma das colunas de cada pórtico com o objetivo de se medirem os deslocamentos lineares e angulares destes pórticos. Os deslocamentos medidos nas extremidades de cada coluna foram úteis para se determinar os momentos fletores e as reações nas extremidades destas colunas. A influência dos paletes de madeira no comportamento das estruturas do tipo drivein foi verificada com nível de 5% de significância através da análise da variância / Abstract: This dissertation¿s intent is to investigate experimentally the influence the wood pallets exert on the behavior of the drive in storage racks with one level of loading. To consider the pallets as roller supported on both rails of the structure implies in not to consider the influence of the friction between the pallets and the rails in the behavior of the structure, and thus the results obtained by the theoretical model of analysis may lead to results that may differ from the observed in the real structure. With the aim of investigating this influence in conditions as close as possible to the reality, two frames resembling those supplied by manufacturers were tested with three sort of pallets, each one with characteristics and dimensions resembling the pallets utilized by users, but with different resistance and inertia in comparison with each other. The same pallets were tested in the same frames, but this time on rails with an abrasive surface to verify the possible differences in displacements between the structures loaded with pallets on smooth surfaces rails and between structures loaded with pallets on abrasive surfaces rails. Furthermore, the frames were subjected to a suspense load with the aim of simulating the theoretical model of analysis. Each arm were tested with vertical forces of 245N, 490N, 735N and 980N. It was considered also the horizontal force of 1,5% of the vertical force acting on the frame to take into consideration the lift truck operation. With the aim of measuring the linear and angular displacements of these frames, two dial gages were positioned at the top and one was positioned at the bottom of each column. The readings of all linear and angular displacements at the end of the columns were useful for evaluating the bending moments, the horizontal and vertical reactions acting in each one of the end of the columns of these frames. The 8 elements considered (3 pallets on smooth surface rails, 3 pallets on abrasive surface rails, 1 suspense load and 1 for the Slope-Deflection Method) were combined in groups of 3, so that the influence of the wood pallets in the behavior of drive in racks can be investigated through the variance analysis with 5% in the level of significance / Mestrado / Estruturas / Mestre em Engenharia Civil
40

An investigation into the efficiency of the port / rail interface at the Port of Durban

Foolchand, Paris 30 June 2006 (has links)
Trade liberalization and resultantly globalization has led to the relative free flow of goods, services, capital and people. The transport system in South Africa must be highly reliable and rapid to contribute to economic development. The focus of this research study is on the Port/Rail Interface in the Port of Durban which critically assesses the transfer of goods particularly from rail transport to and from vessels within the port precinct. Some of the major constraints identified in the study related to poor infrastructure, operations and levels of services; lack of maintenance, availability of rolling stock, locomotives and cargo stacking space. Transnet's role is pivotal in providing efficient port and rail operations and is currently upgrading infrastructure, operations and capacity of the port and rail services. One of the main objectives of the study is to present recommendations to Transnet management that arise out of the shortcomings identified during the course of the research study. / Transport Economics / M. Comm.

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