Similarity Search and Analysis Techniques for Uncertain Time Series Data

Emerging applications, such as wireless sensor networks and location-based services, require the ability to analyze large quantities of uncertain time series, where the exact value at each timestamp is unavailable or unknown. Traditional similarity search techniques used for standard time series are not always effective for uncertain time series data analysis. This motivates our work in this dissertation. We investigate new, efficient solution techniques for similarity search and analysis of both uncertain time series models, i.e., PDF-based uncertain time series (having probability density function) and multiset-based uncertain time series (having multiset of observed values) in general, as well as correlation queries in particular. In our research, we first formalize the notion of normalization. This notion is used to introduce the idea of correlation for uncertain time series data. We model uncertain correlation as a random variable that is a basis to develop techniques for similarity search and analysis of uncertain time series. We consider a class of probabilistic, threshold-based correlation queries over such data. Moreover, we propose a few query optimization and query quality improvement techniques. Finally, we demonstrate experimentally how the proposed techniques can improve similarity search in uncertain time series. We believe that our results provide a theoretical baseline for uncertain time series management and analysis tools that will be required to support many existing and emerging applications

Smart destinations and the evolution of ICTs: a new scenario for destination management?

[EN] The impact of information and communication technologies (ICTs) on tourism and their foreseeable future evolution seem to be shaping a new scenario for destination management. This new context has given rise to the need for new management models. One of these models is the emerging smart tourism destination (STD), although it requires greater conceptual precision in order to become a new paradigm for destination management. This paper proposes a systemic model for STDs which facilitates the interpretation of the role of ICTs in the management of tourism destinations. Accordingly, the Delphi technique has been applied so as to determine the opinion of experts regarding the feasibility of the STD approach, its advantages and limitations and also the size of the impact of ICTs on the management and marketing of tourism destinations. This prospective exercise highlights the intensification of the impact of ICTs over the coming years which will shape a new scenario for management characterised by technology and data management. However, the efficiency of the STD approach will not depend exclusively only on technology but also on an appropriate governance of the destination that systematically incorporates the three levels of the STD, namely the strategic¿relational, instrumental and applied levels.This research has been carried out within the framework of the project "New approaches for tourism destinations planning and management: conceptualization, case studies and problems. Definition of smart tourist destinations models" (CSO2014-59193-R) under the Spanish National R&D&I Plan financed by the Ministry of Economy and Competitiveness.Ivars-Baidal, JA.; Celdrán-Bernabeu, MA.; Mazón, JN.; Perles Ivars, A. (2019). Smart destinations and the evolution of ICTs: a new scenario for destination management?. 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The art of place-making on Wurundjeri Country today

This thesis moves through an old stony part of south-east Australia where Merri Creek trickles along a crack in the hardened urbanised lava flow of Melbourne’s north. I connect as a non- Indigenous woman with the First Nations Wurundjeri people here. Together we acknowledge Wurundjeri Country in the thesis through its fragmented grasslands, valleys and the remnants of indigenous plants and animals including reedy Phragmites and elusive Golden Sun Moths. In Australia, ‘Country’ with a capital ‘C’, doesn’t simply refer to creeks, rocky outcrops, or hills in ‘landscape’ terms. Rather, ‘Country’ describes Aboriginal and Torres Strait Islander peoples’ family origins and associations with particular places and embraces spiritual, physical, social and cultural connections. The thesis began in the contemporary contact zone from relationships between Merri Creek Management Committee where I work, and Wurundjeri Tribe Land Compensation and Cultural Heritage Council. This thesis was planned with the Wurundjeri people I worked with. Noticing the lack of published work about Wurundjeri Country today motivated some of us who were working together to shape the necessary intercultural agreements so I could address the issues carefully in this academic context. We designed the thesis as a storying of the things we saw, did and made that connected us to Wurundjeri Country. The overarching research question between us became: ‘How do we see, feel and identify Wurundjeri Country in a contact zone of cultural differences, in a largely urbanised place?’ The formal study positioned me as researcher and therefore created a different relationship for Wurundjeri people and me. As researcher, I had to sharpen my attention to colonisation, my non-Indigeneity, and concerns regarding representation and the risks involved, such as the production of deficit narratives of Aboriginal and Torres Strait Islander peoples. Within the developing thesis, I began to recognise how layers of volatility contained unexpected possibilities in a contact zone of differences, boundaries, and responsibilities. I have used a relational, emergent and decolonising approach to read the materiality of Country and its objects, creatures, rocks, bark, feathers, plants and ochre. The product is a ‘deep map’ of Wurundjeri Country that includes our various ‘makings’, including necklaces, bouquets, shields and skirts, and two recorded conversations with two Wurundjeri leaders. This is all expressed alongside my etchings, letter writing, and journaling. The emergent deep map is ‘a/r/tographic’ in the sense that it combines art, research, teaching, writing, talking, making, feeling, and learning (Springgay et al., 2005). The concept of ‘the art of place-making’ produces this contemporary deep map of Wurundjeri Country with its intercultural volatilities as well as the unpredictable qualities of making, talking, and remembering. Findings unfolded by constantly going to and fro with people, ideas, places, materials and sharing draft versions of the text. A commitment to motion and a multiplicity of methods is shown to be a vital part of ethical practice in the contact zone, a momentum which built rich exchanges here and is applicable to knowing Country at the cultural interface elsewhere in Australia. In all these ways, ‘antiphonal calling’ has become the signature of this thesis. While antiphonal calling ordinarily refers to vocalising between birds or interacting choirs, here, antiphonal calling lies within intercultural encounters, and with Country. My antiphonal methodology is relational geologically, ancestrally, archivally, contemporarily, and seasonally. The antiphonal prism calls between intercultural spaces to connect in multiple ways with the crying, singing, and feeling that continues to make Wurundjeri Country knowable today

Design and Implementation of an Object-Oriented Space-Time GIS Data Model

Geographic data are closely related to both spatial and temporal domains. Geographic information systems (GIS) can capture, manage, analyze, and display spatial data. However, they are not suitable for handling temporal data. Rapid developments of data collection and location-aware technologies stimulate the interests of obtaining useful information from the historical data. Researchers have been working to build various spatio-temporal data models to support spatio-temporal query. Nevertheless, the existing models exhibit weaknesses in various aspects. For instance, the snapshot model is plagued with data redundancy and the event-based spatio-temporal data model (ESTDM) is limited to raster dataset. This study reviews existing spatio-temporal data models in order to design an object-oriented space-time GIS data model that makes additional contributions to processing spatio-temporal data. A binary large object (BLOB) data type, labeled Space-Time BLOB, is added to ArcGIS geodatabase data model to store instantiated space-time objects. A Space-Time BLOB is associated with an array that contains the spatial and temporal information for an object at different time points and time intervals. This study also implements a space-time GIS prototype system, along with a set of spatio-temporal query functions, based on the proposed space-time GIS data model

Argonauts of the Western Pacific

The introductory chapter, entitled 'The Subject, Method and Scope of this Enquiry,' details how anthropology is to be pursued as a science and advocates the method of participant observation