published_or_final_version / Industrial and Manufacturing Systems Engineering / Master / Master of Philosophy

Not available / text

published_or_final_version / abstract / toc / Transport Policy and Planning / Master / Master of Arts in Transport Policy and Planning

No abstract available. / Thesis (M.T.R.P.)-University of KwaZulu-Natal, Durban, 2008.

Thesis (M.S.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 73-76). Also available on the World Wide Web.

The aim of this investigation is to test and verify a hypothesis concerning policies for berth allocation to ships in a container terminal. The chosen domain is a rich research area where simulation could be used. Because of the high amount of variables involved and demand for optimal usage of available resources management of a container terminal is a great challenge.

Cyber-Physical Systems (CPS) are physical entities whose operations are monitored, coordinated, and controlled by a computing and communication core. These systems are highly heterogeneous and complex. Their numerous components and cross domain complexity make attacks easy to propagate and security difficult to implement. Consequently, to secure these systems, they need to be built in a systematic and holistic way, where security is an integral part of the development lifecycle and not just an activity after development. These systems present a multitude of implementation details in their component units, so it is fundamental to use abstraction in the analysis and construction of their architecture. In particular, we can apply abstraction through the use of patterns. Pattern-based architectural modeling is a powerful way to describe the system and analyze its security and the other non-functional aspects. Patterns also have the potential to unify the design of their computational, communication, and control aspects. Architectural modeling can be performed through UML diagrams to show the interactions and dependencies between different components and its stakeholders. Also, it can be used to analyze security threats and describe the possible countermeasures to mitigate these threats. An important type of CPS is a maritime container terminal, a facility where cargo containers are transported between ships and land vehicles; for example, trains or trucks, for onward transportation, and vice versa. Every cargo port performs four basic functions: receiving, storing, staging and loading for both, import and export containers. We present here a set of patterns that describe the elements and functions of a cargo port system, and a Reference Architecture (RA) built using these patterns. We analyze and systematically enumerate the possible security threats to a container terminal in a cargo port using activity diagrams derived from selected use cases of the system. We describe these threats using misuse patterns, and from them select security patterns as defenses. The RA provides a framework to determine where to add these security mechanisms to stop or mitigate these threats and build a Security Reference Architecture (SRA) for CPS. An SRA is an abstract architecture describing a conceptual model of security that provides a way to specify security requirements for a wide range of concrete architectures. The analysis and design are given using a cargo port as our example, but the approach can be used in other domains as well. This is the first work we know where patterns and RAs are used to represent cargo ports and analyze their security. / Includes bibliography. / Dissertation (PhD)--Florida Atlantic University, 2021. / FAU Electronic Theses and Dissertations Collection

Thesis (MBA (Business Management))--University of Stellenbosch, 2010. / ENGLISH ABSTRACT: Transnet, the entity responsible for port infrastructure and the operating thereof, are faced with the difficult task of ensuring that the port system in South Africa is always ready to cater to all import and export requirements of the country. A major portion of these volumes will enter and leave the country in the form of containerised cargo, which effectively unitises the cargo for easier handling. What makes the task for Transnet that much more difficult, is that volumes are not easily forecasted and when one takes into account that ports need to be looking at least ten years down the line to ensure infrastructure can be put in place in time, it makes the problem that much more difficult. International studies show that trade between India, Europe and South America are growing, which provides South Africa with the opportunity to become a hub port based on the countries central location between these three areas. Currently Durban and the recently opened port of Ngqura are and will be serving as hub ports to cater for these and other volumes, but it is not certain under what conditions there would be a need for an additional hub port, if at all. Through the course of this research report three scenarios of growth are examined in an effort to answer this question. / AFRIKAANSE OPSOMMING: Transnet, die entiteit verantwoordelik vir hawe-infrastruktuur en die werking daarvan, is met die moeilike taak geplaas om te verseker dat die hawe-stelsel in Suid-Afrika altyd gereed is vir al die invoer en uitvoer vereistes van die land. 'n Groot gedeelte van hierdie vereistes sal die land betree en verlaat in die vorm van houers, wat goedere unitiseer vir makliker hantering. Wat die taak vir Transnet soveel moeiliker maak, is dat die volumes nie maklik geskat kan word nie, en wanneer Transnet ten minste tien jaar in die toekoms moet skat om seker te maak dat die infrastruktuur in plek kan gestel word in tyd, maak dit die probleem soveel moeiliker. Internasionale navorsing dui dat die handel tussen Indië, Europa en Suid-Amerika groei, wat vir Suid-Afrika die geleentheid skep om 'n ‘hub port’ to word wat gebaseer is op die land se sentrale ligging tussen hierdie drie lande. Op die oomblik sal Durban en die onlangs geopende hawe van Ngqura, as ‘hub ports’ funksioneer om voorsiening te maak vir hierdie en ander volumes, maar dit is nie seker onder watter omstandighede sou daar 'n behoefte vir 'n ekstra-hub port wees nie. Deur die loop van hierdie navorsing word verslag gelewer van die drie scenario's, en word hierdie vraag ondersoek in 'n poging om hierdie vraag te beantwoord.

published_or_final_version / Industrial and Manufacturing Systems Engineering / Master / Master of Philosophy

Ports and container terminals have very complex and dynamic operations. Effective and efficient berth schedules are essential for profitable and sustainable operations. This research studies berth scheduling under uncertainties in arrival and handling times. Port operators usually face challenges in the development of berth schedules. This thesis presents a model formulation of discrete berth space that accounts for uncertainty in arrival and handling times. The problem is reformulated as a biobjective bi-level optimization berth scheduling problem. A solution approach is presented using evolutionary algorithms and heuristics. The objective of the formulation is to provide a robust berth schedule by minimizing the average and the range of the total service times for all vessels served at the terminal. Simulation is utilized to evaluate the proposed berth scheduling policy and compare it to two first-come-first-served policies. Results showed that the proposed berth schedules outperform under high congestion. / by Maria Isabel Portal Palomo. / Vita. / Thesis (M.S.C.S.)--Florida Atlantic University, 2013. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.