Global ETD Search

61	Oceanographic Considerations for the Management and Protection of Surfing Breaks Scarfe, Bradley Edward January 2008 (has links) Although the physical characteristics of surfing breaks are well described in the literature, there is little specific research on surfing and coastal management. Such research is required because coastal engineering has had significant impacts to surfing breaks, both positive and negative. Strategic planning and environmental impact assessment methods, a central tenet of integrated coastal zone management (ICZM), are recommended by this thesis to maximise surfing amenities. The research reported here identifies key oceanographic considerations required for ICZM around surfing breaks including: surfing wave parameters; surfing break components; relationship between surfer skill, surfing manoeuvre type and wave parameters; wind effects on waves; currents; geomorphic surfing break categorisation; beach-state and morphology; and offshore wave transformations. Key coastal activities that can have impacts to surfing breaks are identified. Environmental data types to consider during coastal studies around surfing breaks are presented and geographic information systems (GIS) are used to manage and interpret such information. To monitor surfing breaks, a shallow water multibeam echo sounding system was utilised and a RTK GPS water level correction and hydrographic GIS methodology developed. Including surfing in coastal management requires coastal engineering solutions that incorporate surfing. As an example, the efficacy of the artificial surfing reef (ASR) at Mount Maunganui, New Zealand, was evaluated. GIS, multibeam echo soundings, oceanographic measurements, photography, and wave modelling were all applied to monitor sea floor morphology around the reef. Results showed that the beach-state has more cellular circulation since the reef was installed, and a groin effect on the offshore bar was caused by the structure within the monitoring period, trapping sediment updrift and eroding sediment downdrift. No identifiable shoreline salient was observed. Landward of the reef, a scour hole ~3 times the surface area of the reef has formed. The current literature on ASRs has primarily focused on reef shape and its role in creating surfing waves. However, this study suggests that impacts to the offshore bar, beach-state, scour hole and surf zone hydrodynamics should all be included in future surfing reef designs. More real world reef studies, including ongoing monitoring of existing surfing reefs are required to validate theoretical concepts in the published literature. Aramoana Beach Dunedin (New Zealand) ArcGIS ArcSDE artificial surfing reef backscatter Baseline Data Collection bathymetry bathymetric surveying beach morphodynamics beach-state and morphology breaking wave height coastal engineering coastal environment coastal management coastal monitoring coastal processes coastal structures currents economic value EIA environmental data management environmental impact assessment geographic information systems geoid geomorphic surfing break categorisation GIS groin hydrodynamic modelling hydrographic surveying hydrography ICZM incline plane modelling integrated coastal zone management Main Beach Mount Maunganui (New Zealand) Manu Bay Boat Ramp Raglan (New Zealand) measuring water levels morphological coupling multibeam echo soundings oceanography offshore wave transformations Palm Beach Reefs Gold Coast (Australia) RTK GPS salient surf zone hydrodynamics surfing break components surfing reefs surfing tourism surfing wave climate surfing wave parameters Tay Street Mount Maunganui (New Zealand) wave breaking intensity wave climate wave focusing wave modelling wave peel angle wave section length wind effects on waves
62	Svalová výdrž zadního svalového řetězce při pádlování pažemi u amaterských surfařek / Posterior chain muscle endurance and arm paddling peak power in amateur female surfers Kopčilová, Michaela January 2019 (has links) Title: Posterior chain muscle endurance and arm paddling peak power in amateur female surfers Objectives: Thesis is dedicated to female surfing, particularly paddling, as this is an undiscovered area of research. Very few studies have been carried out, which would focus on muscle activity in surfing. None of the studies focused on posterior chain or muscle activity of female surfers while paddling. Not only that the level of competitive surfing is increasing rapidly, as it will be part of Olympic Games in Tokyo in 2020, but the recreational surfers are also becoming more literate about surf science and willing to improve their surfing performance by dry land surf specific trainings. Surfing industry represents a worldwide business, where big companies offer sponsorship, which is reasonable motivation for young athletes (M. Mendez-Villanueva & Bishop, 2005). As the number of recreational and competitive female surfers is raising as well, the level of competitive female surfing is increasing (Booth, 2001) and professional female surfers are becoming equal in regards to getting the same amount of prize money in competitions, more research should be dedicated to female surfing. The aim of this thesis was to study association between posterior chain endurance and other variables such as frequency of...
63	La glisse au coeur des résistances et contestations face à l’institutionnalisation des territoires du surf en Aquitaine / Surfriding as the resistance and protest facing the institutionalization of the surfers’ territories in the Aquitaine region Falaix, Ludovic 06 June 2012 (has links) Cette recherche examine d’une part le caractère ontologique de la spatialisation des surfeurs et appréhende d’autrepart la nature des politiques publiques territorialisées en faveur du surf. Dans le cadre du rapport du surfeur à la vague, onobserve qu’à travers l’acte de glisse, les surfeurs métamorphosent le lieu et produisent leurs espaces de pratique. Ilsnourrissent ainsi le sentiment d’être-au-monde induit par l’habitabilité de la vague, la cosmogonisation de la vague. Enréhabilitant le concept d’habiter forgé par Martin Heidegger, on élabore les contours d’une géographie de l’intime penséecomme l’étude de l’espace habité afin d’envisager « la géographicité » des surfeurs, leurs « prises trajectives », leur« condition géographique ». On distingue donc les termes de lieu et d’espace en démontrant que le premier est atopique,insignifiant tandis que le second est sacralisé. On entend alors dépasser une lecture de l’espace présupposé comme déjàacquis pour l’homme et abordé comme seul support de ses spatialités. Par ailleurs, on examine comment les néoterritorialités sportives induites par la démocratisation du surf sur la côte aquitaine bouleversent la structuration des stations balnéaires fondée sur plus de deux siècles de développement touristique. Les pouvoirs publics, forts de la réhabilitation de l’image du surfeur dans le paysage médiatique, et conscients des enjeux territoriaux inhérents à la promotion de cette pratique sportive, accompagnent l’ancrage du surf et orchestrent une intégration sociospatiale du surf au sein des espaces urbains de ces stations balnéaires. Quant à l’institutionnalisation des territoires du surf, déclinée dans les outils de prospective et de planification territoriale, elle se traduit par « une mise en scène (géo-)graphique » du potentiel récréatif du littoral aquitain, une diversification de l’offre sportive au bénéfice d’un renforcement de l’attractivité touristique. Mais cette institutionnalisation des territoires du surf n’est pas sans provoquer des résistances et contestations de la part de certains surfeurs. Celles-ci, jusqu’ici présentées comme des luttes intestines et stigmatisées dans le seul champ de la déviance, sont alors présentées comme les manifestations d’un désir de préserver la dimension ontologique de l’espace-vague habité. À l’heure où le surf est mobilisé pour réenchanter le littoral aquitain, certains surfeurs, désenchantés vis-à-vis d’un tel projet de développement touristique, résistent et contestent en réponse à ce qu’ils ressentent comme une atteinte à leur existentialité. / This study investigates the ontological feature of the surfers’ spatialization on the one hand and, on the other hand, it endeavours to comprehend the public policies as far as surfriding is concerned. We establish that surfriding enables the surfriders to transform the place and create their own practicing spaces. Hence, they nurse their being into the world inferred by the dwellingness and the cosmogonization of the wave. By way of referring to Martin Heidegger’s concept ofdwelling, we have worked out a geography of the intimate to analyse the dwellt space. We have set apart the notions of placeand space revealing that the first term is meaningless whereas the second notion is made sacred. Moreover, this thesis examines to what extent the sport neoterritoriality induced by the surfriding democratisation on the Aquitaine coastline disrupts the seaside resorts’ organization based on more than two centuries of tourism development. The authorities promote the sociospatial integration of surfriding amidst the urban spaces of the seaside resorts. Through potentialstudy and territorial planning relating to surfriding, the authorities endeavour to strengthen the tourism attractiveness of thecoastline. Confronted with this institutionalization of their territories, some surfers have raised a protest which expresses their will to preserve the ontological dimension of the dwellt wave. While surfring is used to glorify the littoral of the Aquitaine region, some surfers, who are disillusioned by this project of tourism development, protest against what they feel like aninfringement of their existentiality. Surf Processus de spatialisation Habitabilité des espaces Géographie de l’intime Politiques publiques Organisation sociospatiale Prospective territoriale Attractivité touristique Aquitaine Surfing Spatialization process Spaces dwellingness Geography of the intimate Public policies Sociospatial organozation Potential study Tourism attractiveness Aquitaine region. 910
64	A shoulder-surfing resistant graphical password system Alesand, Elias, Sterneling, Hanna January 2017 (has links) The focus of this report is to discuss graphical password systems and how they can contribute to handle security problems that threaten authentication processes. One such threat is shoulder-surfing attacks, which are also reviewed in this report. Three already existing systems that are claimed to be shoulder-surfing resilient are described and a new proposed system is presented and evaluated through a user study. Moreover, the system is compared to the mentioned existing systems to further evaluate the usability, memorability and the time it takes to authenticate. The user study shows that test subjects are able to remember their chosen password one week after having registered and signed in once. It is also shown that the average time to sign in to the system after five minutes of practice is within a range of 3.30 to 5.70 seconds. The participants in the experiments gave the system an average score above 68 on the System Usability Scale, which is the score of an average system. shoulder-surfing resistant graphical password system guessing attacks graphical passwords recognition-based recall-based pure recall-based password security password space pictorial superiority effect brute-force attack dictionary attack hot-spots memorability graphical components authentication Computer Sciences Datavetenskap (datalogi)
65	The urban underclass and post-authoritarian Johannesburg : train surfing (Soweto style) as an extreme spatial practice Steenkamp, Hilke 13 December 2011 (has links) This dissertation aims to position train surfing as a visual spectacle that is practised by Sowetan train surfers within the context of post-authoritarian Johannesburg. The author argues that train surfing is a visual and spatial phenomenon that is theoretically under-researched. As such, this study aims to decode seven train surfing videos to establish what train surfing looks like, where train surfing occurs and why individuals participate in such a high risk activity. This study, furthermore, aims to frame train surfing as a spectacle by investigating the similarities between train surfing and rites of passage (initiation rites). The author also regards train surfing as a very specific form of storytelling. The narratives conveyed in the seven videos are, therefore, interpreted to establish that train surfing is practised to ‘voice’ fatalistic feelings, societal as well as individual crises. After establishing the visual aspects of train surfing, the author focuses on the spatial context of train surfing. Johannesburg is described as both an authoritarian and post-authoritarian construct by tracing the spatial and political history of the city. When the discussion turns to the post-authoritarian city, townships and squatter settlements are analysed as being both marginal and hybrid spaces. It is argued that townships are marginal spaces due to their location, they are inhabited by the underclass and they are formed by processes of capitalism and urbanisation, and as a result of these factors, township residents might have fatalistic mindsets (Gulick 1989). The author, however, contends that township space is an ambivalent construct, and as such, it can also be read as hybrid space. Here, hybrid space is interpreted as a platform from which township residents can resist oppressing spatial and political ideologies. In this context, train surfing is regarded as one way in which train surfers use hybrid space to express tactics of resistance. After establishing the spatial context of train surfing, the socio-economic and material living conditions of train surfers are investigated. The discussion firstly, explores the underclass, as theorised by Jencks and Peterson (1990), and thereafter highlights why train surfers can be classified as being part of this sub-category. It is, furthermore, argued that Sowetan train surfers are part of a new lost generation due to high unemployment rates, the HIV/AIDS pandemic and bleak future outlooks. The author aims to establish that, as a result of their socio-economic status and material living conditions, train surfers are fatalistic, and practice an extreme activity to exert control over one area of their lives, namely their bodies. Lastly, the dissertation aims to explore train surfing as being both a risk-taking activity and a new spatial practice. The dynamics of adolescent risk-taking behaviour is explored by emphasising the psychological motivations behind high risk activities. The author argues that alienating space can be regarded as an additional factor that usher adolescents into risk-taking activities. As such, the place(s) and space(s) inhabited by train surfers, namely Johannesburg, Soweto and township train stations, are discussed as alienating spaces. Moreover, it is argued that alienating spaces create opportunities for resistance (following the power-resistance dialectic inherent to space), and as such, train surfing is interpreted as a de-alienating spatial practice that enables the marginalised train surfer to exert control over his surroundings. / Dissertation (MA)--University of Pretoria, 2012. / Visual Arts / unrestricted De certeau Lefebvre Soja Debord Agency Foucault Spatial practice De-alienation Alienation Risk-taking behaviour Johannesburg Marginal space Hybrid space Underclass Townships Lost generation Fatalism Spectacle Performative theory Authoritarian Post-authoritarian Train surfing UCTD
66	An Integrative Approach to the Treatment of Adolescent Substance Abuse Martin, Kimberly 31 March 2023 (has links) No description available. Psychology Spirituality Psychotherapy Adolescence Youth Adolescent Treatment Substance Abuse Addiction False Self Persona Integrative Approaches Sensorimotor Psychotherapy Surfing Flow Equine Therapy Wilderness Nature Subjective well-being Well-being Self Spirituality Program Proposal

Page generated in 0.0343 seconds