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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.
11

Understanding (eco) tourism from the bottom-up : a case study of Tofino, Clayoquot Sound, in British Columbia

De Andrade, Annemarie 11 1900 (has links)
The concepts of ecotourism and sustainable tourism at the local level refer to the processes within which tourism can foster and contribute to sustainable development at tourist destinations. This thesis argues that in order for destinations to move towards sustainability, tourism must be properly planned and managed towards this goal. Assuming that tourism is a community-industry, planning for tourism must incorporate the perspectives of all tourism stakeholders, including community residents who share their space with tourists and are also part of the tourism product. Using a mixed-methodology that combined 11 unstructured interviews with a 117-respondent survey, this study reports the main constraints for the development of a sustainable tourist destination. It also brings to light the perspectives of the local community on tourism development. I conclude that for the destination to move towards sustainability, barriers must be acknowledged and overcome. Some suggestions are made in this regard. / Science, Faculty of / Resources, Environment and Sustainability (IRES), Institute for / Graduate
12

Implementation and Evaluation of In- Band Network Telemetry in P4

Joshi, Mandar January 2021 (has links)
As computer networks grow more complex as the number of connected devices increases, the monitoring and management of such networks also increases in complexity. Current network monitoring tools such as NetFlow, sFlow, ping, traceroute, and tcpdump prove to be both tedious and offer low accuracy when reporting the network state. With the recent emergence in programmable data plane switches, a new framework was created by the P4 Applications Working Group named In- Band Network Telemetry (INT). INT enables network programmers to obtain fine- grained telemetry information directly from the data plane without involvement from the control plane. This project implements INT in hardware Intel Tofino switches and provides a comparison between the three different INT modes of operations (INTXD, INTMX and INTMD) as defined in the framework specifications. The results show the effects of INT when implemented in the data plane, providing the ability to monitor the path a packet took through the network (switch ingress and egress ports), the hop latency, queue occupancy and queuing latency. However, INT can increase the overhead in both the packet and the bandwidth of the network, reducing application throughput. Measures to counteract this are discussed. An earlier implementation of a standalone telemetry report monitoring system was used and analysed, and it allowed for telemetry reports to be reported and visualised at a rate of up to 50 Kpps without any event detection. The results are applied to a Saab 9LV CMS network, and it is concluded that INT allows network operators to obtain a precise overview of the network state, allowing for easier network troubleshooting. / När datornätverk växer sig i komplexitet när antalet anslutna enheter ökar, metoder för övervakningen och hanteringen av sådana nätverk ökar också i komplexitet. Nuvarande nätverksövervakningsverktyg som NetFlow, sFlow, ping, traceroute och tcpdump visar sig vara både besvärliga och ger låg noggrannhet när man rapporterar nätverkstillståndet. Med den framväxten av programmerbara dataplan och programmerbara switchar skapades ett nytt ramverk av P4 Applications Working Group som heter INT. INT gör det möjligt för nätverksprogrammerare att erhålla finkornig telemetriinformation direkt från dataplanet utan inblandning från kontrollplanet. Detta projekt implementerar INT i Intel Tofino- switchar och ger en jämförelse mellan de tre olika INT- driftsätten (INTXD, INTMX och INTMD) enligt definitionen i specifikationerna. Resultaten visar effekterna av INT när det implementeras i dataplanet, inklusive möjligheten att övervaka vägen som ett paket tog genom nätverket (både ingångs- och utgångsportar på switcharna), hop- latens, köbeläggning och kö- latens. Dock kan INT öka overhead i både paketet och bandbredden i nätverket, vilket minskar applikationsgenomströmningen. Åtgärder för att motverka detta diskuteras. En tidigare implementering av ett fristående övervakningssystem för telemetrirapporter användes och analyserades, och det var möjligt att rapportera och visualisera telemetirapporter med en hastighet på upp till 50 Kpps utan någon händelsedetektering. Resultaten tillämpas på ett Saab 9LV CMS- nätverk och man drar slutsatsen att INT tillåter nätoperatörer att få en noggrann översikt över nätverkstillståndet, vilket möjliggör enklare nätverksfelsökning.
13

New observations of relative sea level from the Northern Cascadia Subduction Zone: Cordilleran ice sheet history and mantle rheology

Belanger, Kevin Karl 26 April 2013 (has links)
New relative sea-level (RSL) observations dating from the late Pleistocene and early Holocene, during and after the collapse of the Cordilleran ice-sheet (CIS), are provided for two regions in southern coastal British Columbia. They record the glacial isostatic adjustment (GIA) response of the Earth to the changing surface load of the waning CIS. The data provide a new RSL curve for Sechelt, on the mainland coast north of Vancouver, and extend and revise a previously constructed curve for Barkley Sound on the west coast of Vancouver Island. The observations create a new profile of RSL curves oriented southwest-northeast across Vancouver Island and the Strait of Georgia. A previously-defined profile of RSL curves is oriented northwest-southeast profile along the east coast of Vancouver Island. The two profiles intersect in the central Strait of Georgia. The new RSL curves sample different parts of the Cascadia Subduction Zone (CSZ) and provide constraints on the history of the CIS. The Juan de Fuca plate subducts beneath the North American plate in roughly the same southwest to northeast direction as the RSL profile. GIA modelling of the RSL observations along this profile may indicate spatial variations related to the structure of the Cascadia Subduction Zone (CSZ). The CIS flowed roughly from northeast to southwest over the regions of interest. RSL observations along this path indicate how sea-level change differed with distance from the edge of the ice-sheet towards its centre. The CIS model of James et al. (2009b) is refined to fit observed sea levels while applying glacial geological constraints to regional ice sheet advance and retreat. Sea level in Barkley Sound dropped from greater than 27 m elevation before 15 cal kyr BP to -46 m below present around 12 cal kyr BP. At Sechelt, sea level closely follows the same trend as in the central Strait of Georgia, dropping from over 150 m before 14 cal kyr BP and falling past present levels after 12.4 cal kyr BP to a poorly constrained lowstand between 12 and 9 cal kyr BP. The initial crustal uplift rate near Sechelt was at least 85 mm/yr, comparable to that of the central Strait of Georgia. The sea-level observations are best fit with predictions employing an Earth model with a 60-km effective lithosphere thickness and asthenospheric viscosity and thickness of 4 × 1019 Pa s and 380 km, respectively. The transition zone and lower mantle viscosities are based on the VM2 Earth model (Peltier 2002). Sea level in Barkley Sound fell quickly (15-30 mm/yr), and observed sea level is best fit with the same asthenospheric viscosity, but with a thinner 30-km thick lithosphere, consistent with the regional tectonic structure. Revisions to the ice model are consistent with radiocarbon constraints on ice sheet history and provide good agreement with the observed sea-level history for the study regions as well as RSL histories previously described for the Strait of Georgia and southern Vancouver Island. / Graduate / 0372
14

The impact of surf tourism on the community of Tofino

Jefferies, Mervyn 20 November 2018 (has links)
This dissertation explores the emergence of surf tourism as a significant aspect of rural communities. It uses an inductive qualitative approach focused on Tofino, British Columbia, Canada as an example to provide an in-depth exploration of a rural community effected by this phenomenon. Qualitative interviews were conducted with a snowball sample of key informants to address the following research objectives: (1) What factors have influenced the evolution of surf tourism in Tofino; (2) How might the evolution of surf tourism in this case study relate to the Tourism Area Life Cycle (TALC); (3) What is the impact of surf tourism on the broader community development of Tofino? Analysis of the Tofino data elicited following themes: (1) For some, surfing is a desirable lifestyle, reflecting in some ways the concepts of specialization, serious leisure, and community’s identity; (2) Surf shops are a community hub for local surfers and surf tourists; (3) Pacific Rim National Park plays a critical role in the region, contributing to surfing and the surf tourism industry, but has yet to fully engage with surfers or the surfing industry; (4) New and more affordable equipment technology has brought increased access to cold-water surf and surf tourism, reducing what may have constrained the early development of surf tourism; (5) Considerable increases in the supply and demand for surfing in Tofino have occurred, tempered by the increased number of surfing competitions and other new tourism segments that exist in the community; (6) Increasing safety issues may undermine the growth of surf tourism; (7) Limits to surf tourism growth are evident regarding facility and physical carrying capacity; (8) As a result of the considerable growth of surfing in Tofino, recreational crowding, and conflict are in evidence, as are coping mechanisms; (9) ‘Localism’ exists in Tofino, but perhaps less so than in other destinations which have a fixed beach break; (10) Surf tourism has the potential for positive and negative impacts on First Nations communities in the region; and (11) Local government plays an important role. These themes were then analyzed and linked to the following theoretical concepts: serious leisure; specialization; leisure constraints; localism; violence; conflict; crowding, carrying capacity, amenity migration, the Tourism Area Life Cycle (TALC); and, rural tourism. This led to some intriguing findings. For example, unlike most other popular surf tourism destinations, crowding is not so apparent in the surf because the surf breaks in the Tofino area are primarily beach breaks that constantly shift as the bathymetry of the ocean floor changes with tides and currents, resulting in constant wave changes. This contrasts with fixed break conditions found elsewhere, so in Tofino it is easier to avoid other surfers by simply moving to another part of the wave. When the Tofino findings were compared with TALC, some similarities and differences were noted. Factors that appear to be consistent with the TALC model are: increasing numbers of tourists, changing type of tourists (e.g. more mass tourists, compared to the early days of surf tourism), increasing numbers of tourism facilities, increased levels of marketing, increased levels of interaction between visitors and local communities (perhaps leading to instances of conflict, and localism), and increased economic benefits to the community. However, one possible departure from the expected trajectory is impacts on the natural environment, which have increased in some ways, but are improved in other ways. There has been some environmental change in terms of the growth in the town of Tofino, and with the development of lodgings near to the surrounding beaches. However, much of the larger landscape, remains largely intact or less impacted than what might have occurred without the presence of Pacific Rim National Park, and the Clayoquot Biosphere Reserve. Further, the TALC model suggests that the development of tourism will lead to lesser local control of development. The Tofino findings suggest that there remains a great deal of local control and that local government support the tourism industry, including surf tourism. It was noted that the emerging surf tourism refers to several concepts found in the general nature tourism literature, such as crowding, conflict and carrying capacity, but the surf tourism literature tends to overlook the complexity of some of these concepts. For example, future surf tourism research might consider more explicit examination of the various dimensions of conflict described in this study, including in group and outgroup conflict, interpersonal conflict and social values conflict. There is little evidence of the incorporation of these concepts in the surf tourism literature. Finally, the data exposed a high level of social capital within the surf community and also between surfers and non-surfers as a facet of a close-knit rural community dependent to a degree on surf tourism as a social driver manifesting in mutual cooperation, trust and reciprocity occurring in social institutions such as surf-shops. / Graduate

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