Authentication of Moving Top-k Spatial Keyword Queries

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Parity-based Data Outsourcing: Extension, Implementation, and Evaluation

Our research has developed a Parity-based Data Outsourcing (PDO) model. This model outsources a set of raw data by associating it with a set of parity data and then distributing both sets of data among a number of cloud servers that are managed independently by different service providers. Users query the servers for the data of their interest and are allowed to perform both authentication and correction. The former refers to the capability of verifying if the query result they receive is correct (i.e., all data items that satisfy the query condition are received, and every data item received is original from the data owner), whereas the latter, the capability of correcting the corrupted data, if any. Existing techniques all rely on complex cryptographic techniques and require the cloud server to build verification objects. In particular, they support only query authentication, but not error correction. In contrast, our approach enables users to perform both query authentication and error correction, and does so without having to install any additional software on a cloud server, which makes it possible to take advantage of the many cloud data management services available on the market today. This thesis makes the following contributions. 1) We extend the PDO model, which was originally designed for one-dimensional data, to handle multi-dimensional data. 2) We implement the PDO model, including parity coding, data encoding, data retrieval, query authentication and correction. 3) We evaluate the performance of the PDO model. We compare it with Merkle Hash Tree (MH-tree) and Signature Chain, two existing techniques that support query authentication, in terms of storage, communication, and computation overhead

The Spatial Agency of the Catacombs: An Analysis of the Interventions of Damasus I (305-384)

Damasus I (305-384) ascended to the office of the Bishop of Rome after a bitter and bloody battle with Ursinus in 366 CE. The violence was a culmination of doctrinal squabbles and power contests which erupted in the Roman church over the course of the fourth century. Damasus engaged in a substantial program of physical renovation and enlargement of martyr sites and personally penned numerous epigrams both extolling the virtue of the honored dead and the patronage of the bishopric. Scholarship related to Damasus and his works is typically narrowly focused, considering motive(s) for his actions, his use of specific architecture and/or materials, the content of his epigrams, etc. This dissertation expands the analysis to synthesize elements of space and architectural theory, sensory theory, and anthropological issues to fully explore the impact of his works related to martyr sites on the minds and bodies of pilgrims visiting such sites during martyr festival. The bishop’s interventions at the catacomb of Callistus serve as a prime example of his use of architectural features, materials, decoration, and rhetoric to forge a distinct collective memory for visitors to the space – memory that was both manifestly Christian and manifestly Roman. Damasus’ use of materials and architectural features redefined the catacomb as monumental space. His proscription of physical movement and the stunning impact of the performance of his epigrams, combined with the sights, sounds, and smells within the space engaged the visitors’ senses to incite synesthesia and visceral seeing toward an encounter with the divine. These elements--catacomb-as-monument and synesthesia--provided visitors a shared visceral experience, which cemented a message of unity and a distinct collective identity for the fracturing Roman Christian community

Recent Advances in Social Data and Artificial Intelligence 2019

The importance and usefulness of subjects and topics involving social data and artificial intelligence are becoming widely recognized. This book contains invited review, expository, and original research articles dealing with, and presenting state-of-the-art accounts pf, the recent advances in the subjects of social data and artificial intelligence, and potentially their links to Cyberspace

Cloaked in Life and Death: Tangi and Taonga in a Contemporary Māori Whanau

This thesis is an examination of tangihanga (indigenous funerary practices) unique to the lived experience of the Māori of Aotearoa New Zealand, drawing on fieldwork undertaken amongst Māori, by a Māori. The introduction and influence of modern practices, ideologies, and articles of significance are considered, in the context of the ongoing traditions of tangihanga, a unique and critical collective occasion. This research navigates a tribally distinct journey by way of familial experiences of death in the Māori world. In particular, this work discusses and elucidates the select materials, objects and taonga (artefacts) observable during our funerary processes, as they engage the rubric of death, burial and initial mourning. Part I: speaks to theoretical and methodological aspects pertinent to the scope of the interdisciplinary work undertaken, and intellectually framed, by the disciplines of Anthropology and Tikanga Māori Cultural Studies. This includes participant observation fieldwork; death, ritual, liminality and oral traditions; the marae context; western and indigenous worldviews and epistemologies; as well as compositional mechanisms and tensions. Part II: addresses some logistics of tangihanga, and introduces key ethnohistoric and ethnographic reflexions, which lead into select participant interviews that act to inform the work. These provide the anthropological other voice, and explore realities and concepts which are at the same time distinct from, yet similar to, my own. Part III: relates five brief tangihanga narratives which present genealogically-inflected ethnographies of death, and facilitate discussions pertaining to the core focus of the thesis. Thereafter the substantive chapter material deliberates upon processes and experiences of the arrival of death in the Māori world, as we return to the marae and eventually embrace the final moments of closing the lid of the casket in preparation for interment. With time, we can see different, innovative ideas and practices being introduced as each new generation, with their respective priorities, subsequently metamorphose the complex rubric of tangihanga. For example, transnational Māori must find new ways to cope with tūpāpaku on foreign shores, and they can also be seen to introduce non-traditional elements when returning tūpāpaku home to Aotearoa. Concern regarding the dietary health of many Māori means we are more aware of the need to reduce fat, salt and sugar intakes, so on many marae meat is becoming leaner, whilst vegetarian and gluten free options are being increasingly considered. Also, premium wall space is diminishing as growing numbers of images arrive with the passing of kin members, so the likes of digital photo albums are being introduced; reflecting increasing new technologies on marae that also includes mobile phones, iPads, laptop computers and so forth. Change seems inevitable and change, in many forms, will continue to encroach on our cultural sensibilities and abodes. As older generations perpetuate age-old traditions, and younger generations acculturate new priorities, change is no longer on the horizon of our marae, but has arrived to affect tangihanga and marae practices. This said, the Māori remain pragmatic and resilient to the winds of change, and this study shows our ability to adapt, as and where need be, whilst also foreboding future generations be as adaptable and ready to change; at the same time as maintaining core cultural traditions and practices. In its most basic form this thesis shows that whilst it matters what clothes we dress our tūpāpaku in, the taonga displayed, the form of burial vessel chosen, mode of disposal and so forth, the rubric of tangihanga nonetheless prioritises the interests of Maori as a collective, communally sharing the complex logistics and burdens of death, as we celebrate a life lived, and lost, collectively. This research will primarily consider the use of tangible materials, objects, and artefacts observable in contemporary tangihanga experiences and question how modernising or secular ideologies have impacted funerary practices for 21st century Māori. Throughout the course of this research I also intend to look into: • What taonga, materials, and objects are observable at tangihanga and why? • Are these items deemed ritually symbolic, and if so how and why? • What is the familial and cultural relevance and significance of such items? • What (if any) values and ideologies do these items express, transpose and/or communicate? • What garments and or taonga are permitted (or not) to adorn the tūpāpaku? Why or why not? • Are all types of photographs and/or images permitted to be displayed, if so where, are there restrictions, and if so then what and why? • Does the immediate physical environment make any difference to the use of materials, objects and artefacts in funerary practices, and if so how and why? Twenty-first century Māori continue to hold fast to age-old traditions, at the same time as being flexible and adapting with changing times. This body of work considers aspects of our earlier funerary traditions, and discusses current traditions, before concluding with postulations regarding potential new practices. As Māori and Pākehā of Aotearoa NZ there is much we have yet to learn from each other, and still much more we might share with our other global contemporaries. Moe mai ra koutou i te moengaroa o te Ariki He tohu aroha tēnei mō koutou kato

Death, dying and dark tourism in contemporary society : a theoretical and empirical analysis

Despite increasing academic and media attention paid to dark tourism – the act of travel to sites of death, disaster and the seemingly macabre – understanding of the concept remains limited, particularly from a consumption perspective. That is, the literature focuses primarily on the supply of dark tourism. Less attention, however, has been paid to the consumption of ‘dark’ touristic experiences and the mediation of such experiences in relation to modern-day mortality. This thesis seeks to address this gap in the literature. Drawing upon thanatological discourse – that is, the analysis of society’s perceptions of and reactions to death and dying – the research objective is to explore the potential of dark tourism as a means of contemplating mortality in (Western) societies. In so doing, the thesis appraises dark tourism consumption within society, especially within a context of contemporary perspectives of death and, consequently, offers an integrated theoretical and empirical critical analysis and interpretation of death-related travel. The study adopts a phenomenological approach and a multiple case studies design with integrative and complementary methods of covert participation observation, semi-structure interviews (n = 64) and survey research (n = 419), as well as a focus group and a diarist account. As a result, the thesis explores the fundamental interrelationships between visitors and sites that offer a representation of death. In particular, the research examines these relationships at Auschwitz-Birkenau State Museum & Memorial (Oświęcim, Poland), WTC Tribute Visitor Centre at Ground Zero (New York), Body Worlds exhibition at the O2 Arena (London), and the Dungeon visitor attractions (York and London). The research finds that in a contemporary secular age where ordinary and normal death is sequestered behind medical and professional façades, yet abnormal and extraordinary death is recreated for popular consumption, dark tourism plays a mediating role between life and death. Ultimately, therefore, the thesis argues that dark tourism is a (new) mediating institution within secularised death sequestered societies, which not only provides a physical place to link the living with the dead, but also allows the Self to construct contemporary meanings of mortality, and to reflect and contemplate both life and death through consuming the Significant Other Dead.EThOS - Electronic Theses Online ServiceGBUnited Kingdo